Import OpenSSL 1.1.1.vendor/openssl/1.1.1

1 files changed, 3661 insertions, 1714 deletions

diff --git a/ssl/ssl_lib.c b/ssl/ssl_lib.c
index 3a6c1b14d4a5..d75158e30c4f 100644
--- a/ssl/ssl_lib.c
+++ b/ssl/ssl_lib.c
@@ -1,274 +1,650 @@
 /*
- * ! \file ssl/ssl_lib.c \brief Version independent SSL functions.
- */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-/* ====================================================================
- * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
- * ECC cipher suite support in OpenSSL originally developed by
- * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
- */
-/* ====================================================================
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
  * Copyright 2005 Nokia. All rights reserved.
  *
- * The portions of the attached software ("Contribution") is developed by
- * Nokia Corporation and is licensed pursuant to the OpenSSL open source
- * license.
- *
- * The Contribution, originally written by Mika Kousa and Pasi Eronen of
- * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
- * support (see RFC 4279) to OpenSSL.
- *
- * No patent licenses or other rights except those expressly stated in
- * the OpenSSL open source license shall be deemed granted or received
- * expressly, by implication, estoppel, or otherwise.
- *
- * No assurances are provided by Nokia that the Contribution does not
- * infringe the patent or other intellectual property rights of any third
- * party or that the license provides you with all the necessary rights
- * to make use of the Contribution.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
- * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
- * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
- * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
- * OTHERWISE.
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
  */
 
-#ifdef REF_CHECK
-# include <assert.h>
-#endif
 #include <stdio.h>
 #include "ssl_locl.h"
-#include "kssl_lcl.h"
 #include <openssl/objects.h>
-#include <openssl/lhash.h>
 #include <openssl/x509v3.h>
 #include <openssl/rand.h>
+#include <openssl/rand_drbg.h>
 #include <openssl/ocsp.h>
-#ifndef OPENSSL_NO_DH
-# include <openssl/dh.h>
-#endif
-#ifndef OPENSSL_NO_ENGINE
-# include <openssl/engine.h>
-#endif
+#include <openssl/dh.h>
+#include <openssl/engine.h>
+#include <openssl/async.h>
+#include <openssl/ct.h>
+#include "internal/cryptlib.h"
+#include "internal/refcount.h"
+
+const char SSL_version_str[] = OPENSSL_VERSION_TEXT;
+
+static int ssl_undefined_function_1(SSL *ssl, SSL3_RECORD *r, size_t s, int t)
+{
+    (void)r;
+    (void)s;
+    (void)t;
+    return ssl_undefined_function(ssl);
+}
+
+static int ssl_undefined_function_2(SSL *ssl, SSL3_RECORD *r, unsigned char *s,
+                                    int t)
+{
+    (void)r;
+    (void)s;
+    (void)t;
+    return ssl_undefined_function(ssl);
+}
 
-const char *SSL_version_str = OPENSSL_VERSION_TEXT;
+static int ssl_undefined_function_3(SSL *ssl, unsigned char *r,
+                                    unsigned char *s, size_t t, size_t *u)
+{
+    (void)r;
+    (void)s;
+    (void)t;
+    (void)u;
+    return ssl_undefined_function(ssl);
+}
+
+static int ssl_undefined_function_4(SSL *ssl, int r)
+{
+    (void)r;
+    return ssl_undefined_function(ssl);
+}
+
+static size_t ssl_undefined_function_5(SSL *ssl, const char *r, size_t s,
+                                       unsigned char *t)
+{
+    (void)r;
+    (void)s;
+    (void)t;
+    return ssl_undefined_function(ssl);
+}
+
+static int ssl_undefined_function_6(int r)
+{
+    (void)r;
+    return ssl_undefined_function(NULL);
+}
+
+static int ssl_undefined_function_7(SSL *ssl, unsigned char *r, size_t s,
+                                    const char *t, size_t u,
+                                    const unsigned char *v, size_t w, int x)
+{
+    (void)r;
+    (void)s;
+    (void)t;
+    (void)u;
+    (void)v;
+    (void)w;
+    (void)x;
+    return ssl_undefined_function(ssl);
+}
 
 SSL3_ENC_METHOD ssl3_undef_enc_method = {
-    /*
-     * evil casts, but these functions are only called if there's a library
-     * bug
-     */
-    (int (*)(SSL *, int))ssl_undefined_function,
-    (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
+    ssl_undefined_function_1,
+    ssl_undefined_function_2,
     ssl_undefined_function,
-    (int (*)(SSL *, unsigned char *, unsigned char *, int))
-        ssl_undefined_function,
-    (int (*)(SSL *, int))ssl_undefined_function,
-    (int (*)(SSL *, const char *, int, unsigned char *))
-        ssl_undefined_function,
-    0,                          /* finish_mac_length */
-    (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
+    ssl_undefined_function_3,
+    ssl_undefined_function_4,
+    ssl_undefined_function_5,
     NULL,                       /* client_finished_label */
     0,                          /* client_finished_label_len */
     NULL,                       /* server_finished_label */
     0,                          /* server_finished_label_len */
-    (int (*)(int))ssl_undefined_function,
-    (int (*)(SSL *, unsigned char *, size_t, const char *,
-             size_t, const unsigned char *, size_t,
-             int use_context))ssl_undefined_function,
+    ssl_undefined_function_6,
+    ssl_undefined_function_7,
 };
 
-int SSL_clear(SSL *s)
+struct ssl_async_args {
+    SSL *s;
+    void *buf;
+    size_t num;
+    enum { READFUNC, WRITEFUNC, OTHERFUNC } type;
+    union {
+        int (*func_read) (SSL *, void *, size_t, size_t *);
+        int (*func_write) (SSL *, const void *, size_t, size_t *);
+        int (*func_other) (SSL *);
+    } f;
+};
+
+static const struct {
+    uint8_t mtype;
+    uint8_t ord;
+    int nid;
+} dane_mds[] = {
+    {
+        DANETLS_MATCHING_FULL, 0, NID_undef
+    },
+    {
+        DANETLS_MATCHING_2256, 1, NID_sha256
+    },
+    {
+        DANETLS_MATCHING_2512, 2, NID_sha512
+    },
+};
+
+static int dane_ctx_enable(struct dane_ctx_st *dctx)
+{
+    const EVP_MD **mdevp;
+    uint8_t *mdord;
+    uint8_t mdmax = DANETLS_MATCHING_LAST;
+    int n = ((int)mdmax) + 1;   /* int to handle PrivMatch(255) */
+    size_t i;
+
+    if (dctx->mdevp != NULL)
+        return 1;
+
+    mdevp = OPENSSL_zalloc(n * sizeof(*mdevp));
+    mdord = OPENSSL_zalloc(n * sizeof(*mdord));
+
+    if (mdord == NULL || mdevp == NULL) {
+        OPENSSL_free(mdord);
+        OPENSSL_free(mdevp);
+        SSLerr(SSL_F_DANE_CTX_ENABLE, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    /* Install default entries */
+    for (i = 0; i < OSSL_NELEM(dane_mds); ++i) {
+        const EVP_MD *md;
+
+        if (dane_mds[i].nid == NID_undef ||
+            (md = EVP_get_digestbynid(dane_mds[i].nid)) == NULL)
+            continue;
+        mdevp[dane_mds[i].mtype] = md;
+        mdord[dane_mds[i].mtype] = dane_mds[i].ord;
+    }
+
+    dctx->mdevp = mdevp;
+    dctx->mdord = mdord;
+    dctx->mdmax = mdmax;
+
+    return 1;
+}
+
+static void dane_ctx_final(struct dane_ctx_st *dctx)
+{
+    OPENSSL_free(dctx->mdevp);
+    dctx->mdevp = NULL;
+
+    OPENSSL_free(dctx->mdord);
+    dctx->mdord = NULL;
+    dctx->mdmax = 0;
+}
+
+static void tlsa_free(danetls_record *t)
+{
+    if (t == NULL)
+        return;
+    OPENSSL_free(t->data);
+    EVP_PKEY_free(t->spki);
+    OPENSSL_free(t);
+}
+
+static void dane_final(SSL_DANE *dane)
+{
+    sk_danetls_record_pop_free(dane->trecs, tlsa_free);
+    dane->trecs = NULL;
+
+    sk_X509_pop_free(dane->certs, X509_free);
+    dane->certs = NULL;
+
+    X509_free(dane->mcert);
+    dane->mcert = NULL;
+    dane->mtlsa = NULL;
+    dane->mdpth = -1;
+    dane->pdpth = -1;
+}
+
+/*
+ * dane_copy - Copy dane configuration, sans verification state.
+ */
+static int ssl_dane_dup(SSL *to, SSL *from)
 {
+    int num;
+    int i;
+
+    if (!DANETLS_ENABLED(&from->dane))
+        return 1;
+
+    num = sk_danetls_record_num(from->dane.trecs);
+    dane_final(&to->dane);
+    to->dane.flags = from->dane.flags;
+    to->dane.dctx = &to->ctx->dane;
+    to->dane.trecs = sk_danetls_record_new_reserve(NULL, num);
 
+    if (to->dane.trecs == NULL) {
+        SSLerr(SSL_F_SSL_DANE_DUP, ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    for (i = 0; i < num; ++i) {
+        danetls_record *t = sk_danetls_record_value(from->dane.trecs, i);
+
+        if (SSL_dane_tlsa_add(to, t->usage, t->selector, t->mtype,
+                              t->data, t->dlen) <= 0)
+            return 0;
+    }
+    return 1;
+}
+
+static int dane_mtype_set(struct dane_ctx_st *dctx,
+                          const EVP_MD *md, uint8_t mtype, uint8_t ord)
+{
+    int i;
+
+    if (mtype == DANETLS_MATCHING_FULL && md != NULL) {
+        SSLerr(SSL_F_DANE_MTYPE_SET, SSL_R_DANE_CANNOT_OVERRIDE_MTYPE_FULL);
+        return 0;
+    }
+
+    if (mtype > dctx->mdmax) {
+        const EVP_MD **mdevp;
+        uint8_t *mdord;
+        int n = ((int)mtype) + 1;
+
+        mdevp = OPENSSL_realloc(dctx->mdevp, n * sizeof(*mdevp));
+        if (mdevp == NULL) {
+            SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
+            return -1;
+        }
+        dctx->mdevp = mdevp;
+
+        mdord = OPENSSL_realloc(dctx->mdord, n * sizeof(*mdord));
+        if (mdord == NULL) {
+            SSLerr(SSL_F_DANE_MTYPE_SET, ERR_R_MALLOC_FAILURE);
+            return -1;
+        }
+        dctx->mdord = mdord;
+
+        /* Zero-fill any gaps */
+        for (i = dctx->mdmax + 1; i < mtype; ++i) {
+            mdevp[i] = NULL;
+            mdord[i] = 0;
+        }
+
+        dctx->mdmax = mtype;
+    }
+
+    dctx->mdevp[mtype] = md;
+    /* Coerce ordinal of disabled matching types to 0 */
+    dctx->mdord[mtype] = (md == NULL) ? 0 : ord;
+
+    return 1;
+}
+
+static const EVP_MD *tlsa_md_get(SSL_DANE *dane, uint8_t mtype)
+{
+    if (mtype > dane->dctx->mdmax)
+        return NULL;
+    return dane->dctx->mdevp[mtype];
+}
+
+static int dane_tlsa_add(SSL_DANE *dane,
+                         uint8_t usage,
+                         uint8_t selector,
+                         uint8_t mtype, unsigned const char *data, size_t dlen)
+{
+    danetls_record *t;
+    const EVP_MD *md = NULL;
+    int ilen = (int)dlen;
+    int i;
+    int num;
+
+    if (dane->trecs == NULL) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_NOT_ENABLED);
+        return -1;
+    }
+
+    if (ilen < 0 || dlen != (size_t)ilen) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DATA_LENGTH);
+        return 0;
+    }
+
+    if (usage > DANETLS_USAGE_LAST) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE_USAGE);
+        return 0;
+    }
+
+    if (selector > DANETLS_SELECTOR_LAST) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_SELECTOR);
+        return 0;
+    }
+
+    if (mtype != DANETLS_MATCHING_FULL) {
+        md = tlsa_md_get(dane, mtype);
+        if (md == NULL) {
+            SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_MATCHING_TYPE);
+            return 0;
+        }
+    }
+
+    if (md != NULL && dlen != (size_t)EVP_MD_size(md)) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_DIGEST_LENGTH);
+        return 0;
+    }
+    if (!data) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_NULL_DATA);
+        return 0;
+    }
+
+    if ((t = OPENSSL_zalloc(sizeof(*t))) == NULL) {
+        SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
+        return -1;
+    }
+
+    t->usage = usage;
+    t->selector = selector;
+    t->mtype = mtype;
+    t->data = OPENSSL_malloc(dlen);
+    if (t->data == NULL) {
+        tlsa_free(t);
+        SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
+        return -1;
+    }
+    memcpy(t->data, data, dlen);
+    t->dlen = dlen;
+
+    /* Validate and cache full certificate or public key */
+    if (mtype == DANETLS_MATCHING_FULL) {
+        const unsigned char *p = data;
+        X509 *cert = NULL;
+        EVP_PKEY *pkey = NULL;
+
+        switch (selector) {
+        case DANETLS_SELECTOR_CERT:
+            if (!d2i_X509(&cert, &p, ilen) || p < data ||
+                dlen != (size_t)(p - data)) {
+                tlsa_free(t);
+                SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
+                return 0;
+            }
+            if (X509_get0_pubkey(cert) == NULL) {
+                tlsa_free(t);
+                SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_CERTIFICATE);
+                return 0;
+            }
+
+            if ((DANETLS_USAGE_BIT(usage) & DANETLS_TA_MASK) == 0) {
+                X509_free(cert);
+                break;
+            }
+
+            /*
+             * For usage DANE-TA(2), we support authentication via "2 0 0" TLSA
+             * records that contain full certificates of trust-anchors that are
+             * not present in the wire chain.  For usage PKIX-TA(0), we augment
+             * the chain with untrusted Full(0) certificates from DNS, in case
+             * they are missing from the chain.
+             */
+            if ((dane->certs == NULL &&
+                 (dane->certs = sk_X509_new_null()) == NULL) ||
+                !sk_X509_push(dane->certs, cert)) {
+                SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
+                X509_free(cert);
+                tlsa_free(t);
+                return -1;
+            }
+            break;
+
+        case DANETLS_SELECTOR_SPKI:
+            if (!d2i_PUBKEY(&pkey, &p, ilen) || p < data ||
+                dlen != (size_t)(p - data)) {
+                tlsa_free(t);
+                SSLerr(SSL_F_DANE_TLSA_ADD, SSL_R_DANE_TLSA_BAD_PUBLIC_KEY);
+                return 0;
+            }
+
+            /*
+             * For usage DANE-TA(2), we support authentication via "2 1 0" TLSA
+             * records that contain full bare keys of trust-anchors that are
+             * not present in the wire chain.
+             */
+            if (usage == DANETLS_USAGE_DANE_TA)
+                t->spki = pkey;
+            else
+                EVP_PKEY_free(pkey);
+            break;
+        }
+    }
+
+    /*-
+     * Find the right insertion point for the new record.
+     *
+     * See crypto/x509/x509_vfy.c.  We sort DANE-EE(3) records first, so that
+     * they can be processed first, as they require no chain building, and no
+     * expiration or hostname checks.  Because DANE-EE(3) is numerically
+     * largest, this is accomplished via descending sort by "usage".
+     *
+     * We also sort in descending order by matching ordinal to simplify
+     * the implementation of digest agility in the verification code.
+     *
+     * The choice of order for the selector is not significant, so we
+     * use the same descending order for consistency.
+     */
+    num = sk_danetls_record_num(dane->trecs);
+    for (i = 0; i < num; ++i) {
+        danetls_record *rec = sk_danetls_record_value(dane->trecs, i);
+
+        if (rec->usage > usage)
+            continue;
+        if (rec->usage < usage)
+            break;
+        if (rec->selector > selector)
+            continue;
+        if (rec->selector < selector)
+            break;
+        if (dane->dctx->mdord[rec->mtype] > dane->dctx->mdord[mtype])
+            continue;
+        break;
+    }
+
+    if (!sk_danetls_record_insert(dane->trecs, t, i)) {
+        tlsa_free(t);
+        SSLerr(SSL_F_DANE_TLSA_ADD, ERR_R_MALLOC_FAILURE);
+        return -1;
+    }
+    dane->umask |= DANETLS_USAGE_BIT(usage);
+
+    return 1;
+}
+
+/*
+ * Return 0 if there is only one version configured and it was disabled
+ * at configure time.  Return 1 otherwise.
+ */
+static int ssl_check_allowed_versions(int min_version, int max_version)
+{
+    int minisdtls = 0, maxisdtls = 0;
+
+    /* Figure out if we're doing DTLS versions or TLS versions */
+    if (min_version == DTLS1_BAD_VER
+        || min_version >> 8 == DTLS1_VERSION_MAJOR)
+        minisdtls = 1;
+    if (max_version == DTLS1_BAD_VER
+        || max_version >> 8 == DTLS1_VERSION_MAJOR)
+        maxisdtls = 1;
+    /* A wildcard version of 0 could be DTLS or TLS. */
+    if ((minisdtls && !maxisdtls && max_version != 0)
+        || (maxisdtls && !minisdtls && min_version != 0)) {
+        /* Mixing DTLS and TLS versions will lead to sadness; deny it. */
+        return 0;
+    }
+
+    if (minisdtls || maxisdtls) {
+        /* Do DTLS version checks. */
+        if (min_version == 0)
+            /* Ignore DTLS1_BAD_VER */
+            min_version = DTLS1_VERSION;
+        if (max_version == 0)
+            max_version = DTLS1_2_VERSION;
+#ifdef OPENSSL_NO_DTLS1_2
+        if (max_version == DTLS1_2_VERSION)
+            max_version = DTLS1_VERSION;
+#endif
+#ifdef OPENSSL_NO_DTLS1
+        if (min_version == DTLS1_VERSION)
+            min_version = DTLS1_2_VERSION;
+#endif
+        /* Done massaging versions; do the check. */
+        if (0
+#ifdef OPENSSL_NO_DTLS1
+            || (DTLS_VERSION_GE(min_version, DTLS1_VERSION)
+                && DTLS_VERSION_GE(DTLS1_VERSION, max_version))
+#endif
+#ifdef OPENSSL_NO_DTLS1_2
+            || (DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)
+                && DTLS_VERSION_GE(DTLS1_2_VERSION, max_version))
+#endif
+            )
+            return 0;
+    } else {
+        /* Regular TLS version checks. */
+        if (min_version == 0)
+            min_version = SSL3_VERSION;
+        if (max_version == 0)
+            max_version = TLS1_3_VERSION;
+#ifdef OPENSSL_NO_TLS1_3
+        if (max_version == TLS1_3_VERSION)
+            max_version = TLS1_2_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1_2
+        if (max_version == TLS1_2_VERSION)
+            max_version = TLS1_1_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1_1
+        if (max_version == TLS1_1_VERSION)
+            max_version = TLS1_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1
+        if (max_version == TLS1_VERSION)
+            max_version = SSL3_VERSION;
+#endif
+#ifdef OPENSSL_NO_SSL3
+        if (min_version == SSL3_VERSION)
+            min_version = TLS1_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1
+        if (min_version == TLS1_VERSION)
+            min_version = TLS1_1_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1_1
+        if (min_version == TLS1_1_VERSION)
+            min_version = TLS1_2_VERSION;
+#endif
+#ifdef OPENSSL_NO_TLS1_2
+        if (min_version == TLS1_2_VERSION)
+            min_version = TLS1_3_VERSION;
+#endif
+        /* Done massaging versions; do the check. */
+        if (0
+#ifdef OPENSSL_NO_SSL3
+            || (min_version <= SSL3_VERSION && SSL3_VERSION <= max_version)
+#endif
+#ifdef OPENSSL_NO_TLS1
+            || (min_version <= TLS1_VERSION && TLS1_VERSION <= max_version)
+#endif
+#ifdef OPENSSL_NO_TLS1_1
+            || (min_version <= TLS1_1_VERSION && TLS1_1_VERSION <= max_version)
+#endif
+#ifdef OPENSSL_NO_TLS1_2
+            || (min_version <= TLS1_2_VERSION && TLS1_2_VERSION <= max_version)
+#endif
+#ifdef OPENSSL_NO_TLS1_3
+            || (min_version <= TLS1_3_VERSION && TLS1_3_VERSION <= max_version)
+#endif
+            )
+            return 0;
+    }
+    return 1;
+}
+
+static void clear_ciphers(SSL *s)
+{
+    /* clear the current cipher */
+    ssl_clear_cipher_ctx(s);
+    ssl_clear_hash_ctx(&s->read_hash);
+    ssl_clear_hash_ctx(&s->write_hash);
+}
+
+int SSL_clear(SSL *s)
+{
     if (s->method == NULL) {
         SSLerr(SSL_F_SSL_CLEAR, SSL_R_NO_METHOD_SPECIFIED);
-        return (0);
+        return 0;
     }
 
     if (ssl_clear_bad_session(s)) {
         SSL_SESSION_free(s->session);
         s->session = NULL;
     }
+    SSL_SESSION_free(s->psksession);
+    s->psksession = NULL;
+    OPENSSL_free(s->psksession_id);
+    s->psksession_id = NULL;
+    s->psksession_id_len = 0;
+    s->hello_retry_request = 0;
+    s->sent_tickets = 0;
 
     s->error = 0;
     s->hit = 0;
     s->shutdown = 0;
 
-#if 0
-    /*
-     * Disabled since version 1.10 of this file (early return not
-     * needed because SSL_clear is not called when doing renegotiation)
-     */
-    /*
-     * This is set if we are doing dynamic renegotiation so keep
-     * the old cipher.  It is sort of a SSL_clear_lite :-)
-     */
-    if (s->renegotiate)
-        return (1);
-#else
     if (s->renegotiate) {
         SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
         return 0;
     }
-#endif
 
-    s->type = 0;
-
-    s->state = SSL_ST_BEFORE | ((s->server) ? SSL_ST_ACCEPT : SSL_ST_CONNECT);
+    ossl_statem_clear(s);
 
     s->version = s->method->version;
     s->client_version = s->version;
     s->rwstate = SSL_NOTHING;
-    s->rstate = SSL_ST_READ_HEADER;
-#if 0
-    s->read_ahead = s->ctx->read_ahead;
-#endif
 
-    if (s->init_buf != NULL) {
-        BUF_MEM_free(s->init_buf);
-        s->init_buf = NULL;
-    }
+    BUF_MEM_free(s->init_buf);
+    s->init_buf = NULL;
+    clear_ciphers(s);
+    s->first_packet = 0;
 
-    ssl_clear_cipher_ctx(s);
-    ssl_clear_hash_ctx(&s->read_hash);
-    ssl_clear_hash_ctx(&s->write_hash);
+    s->key_update = SSL_KEY_UPDATE_NONE;
+
+    EVP_MD_CTX_free(s->pha_dgst);
+    s->pha_dgst = NULL;
+
+    /* Reset DANE verification result state */
+    s->dane.mdpth = -1;
+    s->dane.pdpth = -1;
+    X509_free(s->dane.mcert);
+    s->dane.mcert = NULL;
+    s->dane.mtlsa = NULL;
+
+    /* Clear the verification result peername */
+    X509_VERIFY_PARAM_move_peername(s->param, NULL);
 
-    s->first_packet = 0;
-#ifndef OPENSSL_NO_TLSEXT
-    if (s->cert != NULL) {
-        if (s->cert->alpn_proposed) {
-            OPENSSL_free(s->cert->alpn_proposed);
-            s->cert->alpn_proposed = NULL;
-        }
-        s->cert->alpn_proposed_len = 0;
-        s->cert->alpn_sent = 0;
-    }
-#endif
-#if 1
     /*
      * Check to see if we were changed into a different method, if so, revert
-     * back if we are not doing session-id reuse.
+     * back.
      */
-    if (!s->in_handshake && (s->session == NULL)
-        && (s->method != s->ctx->method)) {
+    if (s->method != s->ctx->method) {
         s->method->ssl_free(s);
         s->method = s->ctx->method;
         if (!s->method->ssl_new(s))
-            return (0);
-    } else
-#endif
-        s->method->ssl_clear(s);
-    return (1);
+            return 0;
+    } else {
+        if (!s->method->ssl_clear(s))
+            return 0;
+    }
+
+    RECORD_LAYER_clear(&s->rlayer);
+
+    return 1;
 }
 
 /** Used to change an SSL_CTXs default SSL method type */
@@ -278,17 +654,16 @@ int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
 
     ctx->method = meth;
 
-    sk = ssl_create_cipher_list(ctx->method, &(ctx->cipher_list),
+    sk = ssl_create_cipher_list(ctx->method,
+                                ctx->tls13_ciphersuites,
+                                &(ctx->cipher_list),
                                 &(ctx->cipher_list_by_id),
-                                meth->version ==
-                                SSL2_VERSION ? "SSLv2" :
                                 SSL_DEFAULT_CIPHER_LIST, ctx->cert);
     if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0)) {
-        SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,
-               SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
-        return (0);
+        SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION, SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
+        return 0;
     }
-    return (1);
+    return 1;
 }
 
 SSL *SSL_new(SSL_CTX *ctx)
@@ -297,141 +672,192 @@ SSL *SSL_new(SSL_CTX *ctx)
 
     if (ctx == NULL) {
         SSLerr(SSL_F_SSL_NEW, SSL_R_NULL_SSL_CTX);
-        return (NULL);
+        return NULL;
     }
     if (ctx->method == NULL) {
         SSLerr(SSL_F_SSL_NEW, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
-        return (NULL);
+        return NULL;
     }
 
-    s = (SSL *)OPENSSL_malloc(sizeof(SSL));
+    s = OPENSSL_zalloc(sizeof(*s));
     if (s == NULL)
         goto err;
-    memset(s, 0, sizeof(SSL));
 
-#ifndef OPENSSL_NO_KRB5
-    s->kssl_ctx = kssl_ctx_new();
-#endif                          /* OPENSSL_NO_KRB5 */
+    s->references = 1;
+    s->lock = CRYPTO_THREAD_lock_new();
+    if (s->lock == NULL) {
+        OPENSSL_free(s);
+        s = NULL;
+        goto err;
+    }
+
+    RECORD_LAYER_init(&s->rlayer, s);
 
     s->options = ctx->options;
+    s->dane.flags = ctx->dane.flags;
+    s->min_proto_version = ctx->min_proto_version;
+    s->max_proto_version = ctx->max_proto_version;
     s->mode = ctx->mode;
     s->max_cert_list = ctx->max_cert_list;
-    s->references = 1;
-
-    if (ctx->cert != NULL) {
-        /*
-         * Earlier library versions used to copy the pointer to the CERT, not
-         * its contents; only when setting new parameters for the per-SSL
-         * copy, ssl_cert_new would be called (and the direct reference to
-         * the per-SSL_CTX settings would be lost, but those still were
-         * indirectly accessed for various purposes, and for that reason they
-         * used to be known as s->ctx->default_cert). Now we don't look at the
-         * SSL_CTX's CERT after having duplicated it once.
-         */
+    s->max_early_data = ctx->max_early_data;
+    s->recv_max_early_data = ctx->recv_max_early_data;
+    s->num_tickets = ctx->num_tickets;
+    s->pha_enabled = ctx->pha_enabled;
+
+    /* Shallow copy of the ciphersuites stack */
+    s->tls13_ciphersuites = sk_SSL_CIPHER_dup(ctx->tls13_ciphersuites);
+    if (s->tls13_ciphersuites == NULL)
+        goto err;
 
-        s->cert = ssl_cert_dup(ctx->cert);
-        if (s->cert == NULL)
-            goto err;
-    } else
-        s->cert = NULL;         /* Cannot really happen (see SSL_CTX_new) */
+    /*
+     * Earlier library versions used to copy the pointer to the CERT, not
+     * its contents; only when setting new parameters for the per-SSL
+     * copy, ssl_cert_new would be called (and the direct reference to
+     * the per-SSL_CTX settings would be lost, but those still were
+     * indirectly accessed for various purposes, and for that reason they
+     * used to be known as s->ctx->default_cert). Now we don't look at the
+     * SSL_CTX's CERT after having duplicated it once.
+     */
+    s->cert = ssl_cert_dup(ctx->cert);
+    if (s->cert == NULL)
+        goto err;
 
-    s->read_ahead = ctx->read_ahead;
+    RECORD_LAYER_set_read_ahead(&s->rlayer, ctx->read_ahead);
     s->msg_callback = ctx->msg_callback;
     s->msg_callback_arg = ctx->msg_callback_arg;
     s->verify_mode = ctx->verify_mode;
-#if 0
-    s->verify_depth = ctx->verify_depth;
-#endif
+    s->not_resumable_session_cb = ctx->not_resumable_session_cb;
+    s->record_padding_cb = ctx->record_padding_cb;
+    s->record_padding_arg = ctx->record_padding_arg;
+    s->block_padding = ctx->block_padding;
     s->sid_ctx_length = ctx->sid_ctx_length;
-    OPENSSL_assert(s->sid_ctx_length <= sizeof(s->sid_ctx));
+    if (!ossl_assert(s->sid_ctx_length <= sizeof(s->sid_ctx)))
+        goto err;
     memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
     s->verify_callback = ctx->default_verify_callback;
     s->generate_session_id = ctx->generate_session_id;
 
     s->param = X509_VERIFY_PARAM_new();
-    if (!s->param)
+    if (s->param == NULL)
         goto err;
     X509_VERIFY_PARAM_inherit(s->param, ctx->param);
-#if 0
-    s->purpose = ctx->purpose;
-    s->trust = ctx->trust;
-#endif
     s->quiet_shutdown = ctx->quiet_shutdown;
-    s->max_send_fragment = ctx->max_send_fragment;
 
-    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
+    s->ext.max_fragment_len_mode = ctx->ext.max_fragment_len_mode;
+    s->max_send_fragment = ctx->max_send_fragment;
+    s->split_send_fragment = ctx->split_send_fragment;
+    s->max_pipelines = ctx->max_pipelines;
+    if (s->max_pipelines > 1)
+        RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
+    if (ctx->default_read_buf_len > 0)
+        SSL_set_default_read_buffer_len(s, ctx->default_read_buf_len);
+
+    SSL_CTX_up_ref(ctx);
     s->ctx = ctx;
-#ifndef OPENSSL_NO_TLSEXT
-    s->tlsext_debug_cb = 0;
-    s->tlsext_debug_arg = NULL;
-    s->tlsext_ticket_expected = 0;
-    s->tlsext_status_type = -1;
-    s->tlsext_status_expected = 0;
-    s->tlsext_ocsp_ids = NULL;
-    s->tlsext_ocsp_exts = NULL;
-    s->tlsext_ocsp_resp = NULL;
-    s->tlsext_ocsp_resplen = -1;
-    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
-    s->initial_ctx = ctx;
-# ifndef OPENSSL_NO_EC
-    if (ctx->tlsext_ecpointformatlist) {
-        s->tlsext_ecpointformatlist =
-            BUF_memdup(ctx->tlsext_ecpointformatlist,
-                       ctx->tlsext_ecpointformatlist_length);
-        if (!s->tlsext_ecpointformatlist)
+    s->ext.debug_cb = 0;
+    s->ext.debug_arg = NULL;
+    s->ext.ticket_expected = 0;
+    s->ext.status_type = ctx->ext.status_type;
+    s->ext.status_expected = 0;
+    s->ext.ocsp.ids = NULL;
+    s->ext.ocsp.exts = NULL;
+    s->ext.ocsp.resp = NULL;
+    s->ext.ocsp.resp_len = 0;
+    SSL_CTX_up_ref(ctx);
+    s->session_ctx = ctx;
+#ifndef OPENSSL_NO_EC
+    if (ctx->ext.ecpointformats) {
+        s->ext.ecpointformats =
+            OPENSSL_memdup(ctx->ext.ecpointformats,
+                           ctx->ext.ecpointformats_len);
+        if (!s->ext.ecpointformats)
             goto err;
-        s->tlsext_ecpointformatlist_length =
-            ctx->tlsext_ecpointformatlist_length;
-    }
-    if (ctx->tlsext_ellipticcurvelist) {
-        s->tlsext_ellipticcurvelist =
-            BUF_memdup(ctx->tlsext_ellipticcurvelist,
-                       ctx->tlsext_ellipticcurvelist_length);
-        if (!s->tlsext_ellipticcurvelist)
+        s->ext.ecpointformats_len =
+            ctx->ext.ecpointformats_len;
+    }
+    if (ctx->ext.supportedgroups) {
+        s->ext.supportedgroups =
+            OPENSSL_memdup(ctx->ext.supportedgroups,
+                           ctx->ext.supportedgroups_len
+                                * sizeof(*ctx->ext.supportedgroups));
+        if (!s->ext.supportedgroups)
             goto err;
-        s->tlsext_ellipticcurvelist_length =
-            ctx->tlsext_ellipticcurvelist_length;
+        s->ext.supportedgroups_len = ctx->ext.supportedgroups_len;
     }
-# endif
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    s->next_proto_negotiated = NULL;
-# endif
+#endif
+#ifndef OPENSSL_NO_NEXTPROTONEG
+    s->ext.npn = NULL;
+#endif
 
-    if (s->ctx->alpn_client_proto_list) {
-        s->alpn_client_proto_list =
-            OPENSSL_malloc(s->ctx->alpn_client_proto_list_len);
-        if (s->alpn_client_proto_list == NULL)
+    if (s->ctx->ext.alpn) {
+        s->ext.alpn = OPENSSL_malloc(s->ctx->ext.alpn_len);
+        if (s->ext.alpn == NULL)
             goto err;
-        memcpy(s->alpn_client_proto_list, s->ctx->alpn_client_proto_list,
-               s->ctx->alpn_client_proto_list_len);
-        s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len;
+        memcpy(s->ext.alpn, s->ctx->ext.alpn, s->ctx->ext.alpn_len);
+        s->ext.alpn_len = s->ctx->ext.alpn_len;
     }
-#endif
 
+    s->verified_chain = NULL;
     s->verify_result = X509_V_OK;
 
+    s->default_passwd_callback = ctx->default_passwd_callback;
+    s->default_passwd_callback_userdata = ctx->default_passwd_callback_userdata;
+
     s->method = ctx->method;
 
+    s->key_update = SSL_KEY_UPDATE_NONE;
+
+    s->allow_early_data_cb = ctx->allow_early_data_cb;
+    s->allow_early_data_cb_data = ctx->allow_early_data_cb_data;
+
     if (!s->method->ssl_new(s))
         goto err;
 
     s->server = (ctx->method->ssl_accept == ssl_undefined_function) ? 0 : 1;
 
-    SSL_clear(s);
+    if (!SSL_clear(s))
+        goto err;
 
-    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
+    if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data))
+        goto err;
 
 #ifndef OPENSSL_NO_PSK
     s->psk_client_callback = ctx->psk_client_callback;
     s->psk_server_callback = ctx->psk_server_callback;
 #endif
+    s->psk_find_session_cb = ctx->psk_find_session_cb;
+    s->psk_use_session_cb = ctx->psk_use_session_cb;
+
+    s->job = NULL;
+
+#ifndef OPENSSL_NO_CT
+    if (!SSL_set_ct_validation_callback(s, ctx->ct_validation_callback,
+                                        ctx->ct_validation_callback_arg))
+        goto err;
+#endif
 
-    return (s);
+    return s;
  err:
-    if (s != NULL)
-        SSL_free(s);
+    SSL_free(s);
     SSLerr(SSL_F_SSL_NEW, ERR_R_MALLOC_FAILURE);
-    return (NULL);
+    return NULL;
+}
+
+int SSL_is_dtls(const SSL *s)
+{
+    return SSL_IS_DTLS(s) ? 1 : 0;
+}
+
+int SSL_up_ref(SSL *s)
+{
+    int i;
+
+    if (CRYPTO_UP_REF(&s->references, &i, s->lock) <= 0)
+        return 0;
+
+    REF_PRINT_COUNT("SSL", s);
+    REF_ASSERT_ISNT(i < 2);
+    return ((i > 1) ? 1 : 0);
 }
 
 int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
@@ -464,17 +890,17 @@ int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx,
 
 int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
 {
-    CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+    CRYPTO_THREAD_write_lock(ctx->lock);
     ctx->generate_session_id = cb;
-    CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+    CRYPTO_THREAD_unlock(ctx->lock);
     return 1;
 }
 
 int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
 {
-    CRYPTO_w_lock(CRYPTO_LOCK_SSL);
+    CRYPTO_THREAD_write_lock(ssl->lock);
     ssl->generate_session_id = cb;
-    CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
+    CRYPTO_THREAD_unlock(ssl->lock);
     return 1;
 }
 
@@ -483,7 +909,7 @@ int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
 {
     /*
      * A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
-     * we can "construct" a session to give us the desired check - ie. to
+     * we can "construct" a session to give us the desired check - i.e. to
      * find if there's a session in the hash table that would conflict with
      * any new session built out of this id/id_len and the ssl_version in use
      * by this SSL.
@@ -496,21 +922,10 @@ int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
     r.ssl_version = ssl->version;
     r.session_id_length = id_len;
     memcpy(r.session_id, id, id_len);
-    /*
-     * NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
-     * callback is calling us to check the uniqueness of a shorter ID, it
-     * must be compared as a padded-out ID because that is what it will be
-     * converted to when the callback has finished choosing it.
-     */
-    if ((r.ssl_version == SSL2_VERSION) &&
-        (id_len < SSL2_SSL_SESSION_ID_LENGTH)) {
-        memset(r.session_id + id_len, 0, SSL2_SSL_SESSION_ID_LENGTH - id_len);
-        r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
-    }
 
-    CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
-    p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
-    CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+    CRYPTO_THREAD_read_lock(ssl->session_ctx->lock);
+    p = lh_SSL_SESSION_retrieve(ssl->session_ctx->sessions, &r);
+    CRYPTO_THREAD_unlock(ssl->session_ctx->lock);
     return (p != NULL);
 }
 
@@ -534,6 +949,160 @@ int SSL_set_trust(SSL *s, int trust)
     return X509_VERIFY_PARAM_set_trust(s->param, trust);
 }
 
+int SSL_set1_host(SSL *s, const char *hostname)
+{
+    return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
+}
+
+int SSL_add1_host(SSL *s, const char *hostname)
+{
+    return X509_VERIFY_PARAM_add1_host(s->param, hostname, 0);
+}
+
+void SSL_set_hostflags(SSL *s, unsigned int flags)
+{
+    X509_VERIFY_PARAM_set_hostflags(s->param, flags);
+}
+
+const char *SSL_get0_peername(SSL *s)
+{
+    return X509_VERIFY_PARAM_get0_peername(s->param);
+}
+
+int SSL_CTX_dane_enable(SSL_CTX *ctx)
+{
+    return dane_ctx_enable(&ctx->dane);
+}
+
+unsigned long SSL_CTX_dane_set_flags(SSL_CTX *ctx, unsigned long flags)
+{
+    unsigned long orig = ctx->dane.flags;
+
+    ctx->dane.flags |= flags;
+    return orig;
+}
+
+unsigned long SSL_CTX_dane_clear_flags(SSL_CTX *ctx, unsigned long flags)
+{
+    unsigned long orig = ctx->dane.flags;
+
+    ctx->dane.flags &= ~flags;
+    return orig;
+}
+
+int SSL_dane_enable(SSL *s, const char *basedomain)
+{
+    SSL_DANE *dane = &s->dane;
+
+    if (s->ctx->dane.mdmax == 0) {
+        SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_CONTEXT_NOT_DANE_ENABLED);
+        return 0;
+    }
+    if (dane->trecs != NULL) {
+        SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_DANE_ALREADY_ENABLED);
+        return 0;
+    }
+
+    /*
+     * Default SNI name.  This rejects empty names, while set1_host below
+     * accepts them and disables host name checks.  To avoid side-effects with
+     * invalid input, set the SNI name first.
+     */
+    if (s->ext.hostname == NULL) {
+        if (!SSL_set_tlsext_host_name(s, basedomain)) {
+            SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
+            return -1;
+        }
+    }
+
+    /* Primary RFC6125 reference identifier */
+    if (!X509_VERIFY_PARAM_set1_host(s->param, basedomain, 0)) {
+        SSLerr(SSL_F_SSL_DANE_ENABLE, SSL_R_ERROR_SETTING_TLSA_BASE_DOMAIN);
+        return -1;
+    }
+
+    dane->mdpth = -1;
+    dane->pdpth = -1;
+    dane->dctx = &s->ctx->dane;
+    dane->trecs = sk_danetls_record_new_null();
+
+    if (dane->trecs == NULL) {
+        SSLerr(SSL_F_SSL_DANE_ENABLE, ERR_R_MALLOC_FAILURE);
+        return -1;
+    }
+    return 1;
+}
+
+unsigned long SSL_dane_set_flags(SSL *ssl, unsigned long flags)
+{
+    unsigned long orig = ssl->dane.flags;
+
+    ssl->dane.flags |= flags;
+    return orig;
+}
+
+unsigned long SSL_dane_clear_flags(SSL *ssl, unsigned long flags)
+{
+    unsigned long orig = ssl->dane.flags;
+
+    ssl->dane.flags &= ~flags;
+    return orig;
+}
+
+int SSL_get0_dane_authority(SSL *s, X509 **mcert, EVP_PKEY **mspki)
+{
+    SSL_DANE *dane = &s->dane;
+
+    if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
+        return -1;
+    if (dane->mtlsa) {
+        if (mcert)
+            *mcert = dane->mcert;
+        if (mspki)
+            *mspki = (dane->mcert == NULL) ? dane->mtlsa->spki : NULL;
+    }
+    return dane->mdpth;
+}
+
+int SSL_get0_dane_tlsa(SSL *s, uint8_t *usage, uint8_t *selector,
+                       uint8_t *mtype, unsigned const char **data, size_t *dlen)
+{
+    SSL_DANE *dane = &s->dane;
+
+    if (!DANETLS_ENABLED(dane) || s->verify_result != X509_V_OK)
+        return -1;
+    if (dane->mtlsa) {
+        if (usage)
+            *usage = dane->mtlsa->usage;
+        if (selector)
+            *selector = dane->mtlsa->selector;
+        if (mtype)
+            *mtype = dane->mtlsa->mtype;
+        if (data)
+            *data = dane->mtlsa->data;
+        if (dlen)
+            *dlen = dane->mtlsa->dlen;
+    }
+    return dane->mdpth;
+}
+
+SSL_DANE *SSL_get0_dane(SSL *s)
+{
+    return &s->dane;
+}
+
+int SSL_dane_tlsa_add(SSL *s, uint8_t usage, uint8_t selector,
+                      uint8_t mtype, unsigned const char *data, size_t dlen)
+{
+    return dane_tlsa_add(&s->dane, usage, selector, mtype, data, dlen);
+}
+
+int SSL_CTX_dane_mtype_set(SSL_CTX *ctx, const EVP_MD *md, uint8_t mtype,
+                           uint8_t ord)
+{
+    return dane_mtype_set(&ctx->dane, md, mtype, ord);
+}
+
 int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
 {
     return X509_VERIFY_PARAM_set1(ctx->param, vpm);
@@ -565,143 +1134,171 @@ void SSL_free(SSL *s)
 
     if (s == NULL)
         return;
-
-    i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL);
-#ifdef REF_PRINT
-    REF_PRINT("SSL", s);
-#endif
+    CRYPTO_DOWN_REF(&s->references, &i, s->lock);
+    REF_PRINT_COUNT("SSL", s);
     if (i > 0)
         return;
-#ifdef REF_CHECK
-    if (i < 0) {
-        fprintf(stderr, "SSL_free, bad reference count\n");
-        abort();                /* ok */
-    }
-#endif
-
-    if (s->param)
-        X509_VERIFY_PARAM_free(s->param);
+    REF_ASSERT_ISNT(i < 0);
 
+    X509_VERIFY_PARAM_free(s->param);
+    dane_final(&s->dane);
     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);
 
-    if (s->bbio != NULL) {
-        /* If the buffering BIO is in place, pop it off */
-        if (s->bbio == s->wbio) {
-            s->wbio = BIO_pop(s->wbio);
-        }
-        BIO_free(s->bbio);
-        s->bbio = NULL;
-    }
-    if (s->rbio != NULL)
-        BIO_free_all(s->rbio);
-    if ((s->wbio != NULL) && (s->wbio != s->rbio))
-        BIO_free_all(s->wbio);
+    /* Ignore return value */
+    ssl_free_wbio_buffer(s);
+
+    BIO_free_all(s->wbio);
+    BIO_free_all(s->rbio);
 
-    if (s->init_buf != NULL)
-        BUF_MEM_free(s->init_buf);
+    BUF_MEM_free(s->init_buf);
 
     /* add extra stuff */
-    if (s->cipher_list != NULL)
-        sk_SSL_CIPHER_free(s->cipher_list);
-    if (s->cipher_list_by_id != NULL)
-        sk_SSL_CIPHER_free(s->cipher_list_by_id);
+    sk_SSL_CIPHER_free(s->cipher_list);
+    sk_SSL_CIPHER_free(s->cipher_list_by_id);
+    sk_SSL_CIPHER_free(s->tls13_ciphersuites);
 
     /* Make the next call work :-) */
     if (s->session != NULL) {
         ssl_clear_bad_session(s);
         SSL_SESSION_free(s->session);
     }
+    SSL_SESSION_free(s->psksession);
+    OPENSSL_free(s->psksession_id);
 
-    ssl_clear_cipher_ctx(s);
-    ssl_clear_hash_ctx(&s->read_hash);
-    ssl_clear_hash_ctx(&s->write_hash);
+    clear_ciphers(s);
 
-    if (s->cert != NULL)
-        ssl_cert_free(s->cert);
+    ssl_cert_free(s->cert);
     /* Free up if allocated */
 
-#ifndef OPENSSL_NO_TLSEXT
-    if (s->tlsext_hostname)
-        OPENSSL_free(s->tlsext_hostname);
-    if (s->initial_ctx)
-        SSL_CTX_free(s->initial_ctx);
-# ifndef OPENSSL_NO_EC
-    if (s->tlsext_ecpointformatlist)
-        OPENSSL_free(s->tlsext_ecpointformatlist);
-    if (s->tlsext_ellipticcurvelist)
-        OPENSSL_free(s->tlsext_ellipticcurvelist);
-# endif                         /* OPENSSL_NO_EC */
-    if (s->tlsext_opaque_prf_input)
-        OPENSSL_free(s->tlsext_opaque_prf_input);
-    if (s->tlsext_ocsp_exts)
-        sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, X509_EXTENSION_free);
-    if (s->tlsext_ocsp_ids)
-        sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
-    if (s->tlsext_ocsp_resp)
-        OPENSSL_free(s->tlsext_ocsp_resp);
-    if (s->alpn_client_proto_list)
-        OPENSSL_free(s->alpn_client_proto_list);
+    OPENSSL_free(s->ext.hostname);
+    SSL_CTX_free(s->session_ctx);
+#ifndef OPENSSL_NO_EC
+    OPENSSL_free(s->ext.ecpointformats);
+    OPENSSL_free(s->ext.supportedgroups);
+#endif                          /* OPENSSL_NO_EC */
+    sk_X509_EXTENSION_pop_free(s->ext.ocsp.exts, X509_EXTENSION_free);
+#ifndef OPENSSL_NO_OCSP
+    sk_OCSP_RESPID_pop_free(s->ext.ocsp.ids, OCSP_RESPID_free);
+#endif
+#ifndef OPENSSL_NO_CT
+    SCT_LIST_free(s->scts);
+    OPENSSL_free(s->ext.scts);
 #endif
+    OPENSSL_free(s->ext.ocsp.resp);
+    OPENSSL_free(s->ext.alpn);
+    OPENSSL_free(s->ext.tls13_cookie);
+    OPENSSL_free(s->clienthello);
+    OPENSSL_free(s->pha_context);
+    EVP_MD_CTX_free(s->pha_dgst);
 
-    if (s->client_CA != NULL)
-        sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free);
+    sk_X509_NAME_pop_free(s->ca_names, X509_NAME_free);
+
+    sk_X509_pop_free(s->verified_chain, X509_free);
 
     if (s->method != NULL)
         s->method->ssl_free(s);
 
-    if (s->ctx)
-        SSL_CTX_free(s->ctx);
+    RECORD_LAYER_release(&s->rlayer);
+
+    SSL_CTX_free(s->ctx);
 
-#ifndef OPENSSL_NO_KRB5
-    if (s->kssl_ctx != NULL)
-        kssl_ctx_free(s->kssl_ctx);
-#endif                          /* OPENSSL_NO_KRB5 */
+    ASYNC_WAIT_CTX_free(s->waitctx);
 
-#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
-    if (s->next_proto_negotiated)
-        OPENSSL_free(s->next_proto_negotiated);
+#if !defined(OPENSSL_NO_NEXTPROTONEG)
+    OPENSSL_free(s->ext.npn);
 #endif
 
 #ifndef OPENSSL_NO_SRTP
-    if (s->srtp_profiles)
-        sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
+    sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
 #endif
 
+    CRYPTO_THREAD_lock_free(s->lock);
+
     OPENSSL_free(s);
 }
 
-void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
+void SSL_set0_rbio(SSL *s, BIO *rbio)
+{
+    BIO_free_all(s->rbio);
+    s->rbio = rbio;
+}
+
+void SSL_set0_wbio(SSL *s, BIO *wbio)
 {
     /*
      * If the output buffering BIO is still in place, remove it
      */
-    if (s->bbio != NULL) {
-        if (s->wbio == s->bbio) {
-            s->wbio = s->wbio->next_bio;
-            s->bbio->next_bio = NULL;
-        }
-    }
-    if ((s->rbio != NULL) && (s->rbio != rbio))
-        BIO_free_all(s->rbio);
-    if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
-        BIO_free_all(s->wbio);
-    s->rbio = rbio;
+    if (s->bbio != NULL)
+        s->wbio = BIO_pop(s->wbio);
+
+    BIO_free_all(s->wbio);
     s->wbio = wbio;
+
+    /* Re-attach |bbio| to the new |wbio|. */
+    if (s->bbio != NULL)
+        s->wbio = BIO_push(s->bbio, s->wbio);
+}
+
+void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio)
+{
+    /*
+     * For historical reasons, this function has many different cases in
+     * ownership handling.
+     */
+
+    /* If nothing has changed, do nothing */
+    if (rbio == SSL_get_rbio(s) && wbio == SSL_get_wbio(s))
+        return;
+
+    /*
+     * If the two arguments are equal then one fewer reference is granted by the
+     * caller than we want to take
+     */
+    if (rbio != NULL && rbio == wbio)
+        BIO_up_ref(rbio);
+
+    /*
+     * If only the wbio is changed only adopt one reference.
+     */
+    if (rbio == SSL_get_rbio(s)) {
+        SSL_set0_wbio(s, wbio);
+        return;
+    }
+    /*
+     * There is an asymmetry here for historical reasons. If only the rbio is
+     * changed AND the rbio and wbio were originally different, then we only
+     * adopt one reference.
+     */
+    if (wbio == SSL_get_wbio(s) && SSL_get_rbio(s) != SSL_get_wbio(s)) {
+        SSL_set0_rbio(s, rbio);
+        return;
+    }
+
+    /* Otherwise, adopt both references. */
+    SSL_set0_rbio(s, rbio);
+    SSL_set0_wbio(s, wbio);
 }
 
 BIO *SSL_get_rbio(const SSL *s)
 {
-    return (s->rbio);
+    return s->rbio;
 }
 
 BIO *SSL_get_wbio(const SSL *s)
 {
-    return (s->wbio);
+    if (s->bbio != NULL) {
+        /*
+         * If |bbio| is active, the true caller-configured BIO is its
+         * |next_bio|.
+         */
+        return BIO_next(s->bbio);
+    }
+    return s->wbio;
 }
 
 int SSL_get_fd(const SSL *s)
 {
-    return (SSL_get_rfd(s));
+    return SSL_get_rfd(s);
 }
 
 int SSL_get_rfd(const SSL *s)
@@ -713,7 +1310,7 @@ int SSL_get_rfd(const SSL *s)
     r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
     if (r != NULL)
         BIO_get_fd(r, &ret);
-    return (ret);
+    return ret;
 }
 
 int SSL_get_wfd(const SSL *s)
@@ -725,7 +1322,7 @@ int SSL_get_wfd(const SSL *s)
     r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR);
     if (r != NULL)
         BIO_get_fd(r, &ret);
-    return (ret);
+    return ret;
 }
 
 #ifndef OPENSSL_NO_SOCK
@@ -744,51 +1341,50 @@ int SSL_set_fd(SSL *s, int fd)
     SSL_set_bio(s, bio, bio);
     ret = 1;
  err:
-    return (ret);
+    return ret;
 }
 
 int SSL_set_wfd(SSL *s, int fd)
 {
-    int ret = 0;
-    BIO *bio = NULL;
+    BIO *rbio = SSL_get_rbio(s);
 
-    if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
-        || ((int)BIO_get_fd(s->rbio, NULL) != fd)) {
-        bio = BIO_new(BIO_s_socket());
+    if (rbio == NULL || BIO_method_type(rbio) != BIO_TYPE_SOCKET
+        || (int)BIO_get_fd(rbio, NULL) != fd) {
+        BIO *bio = BIO_new(BIO_s_socket());
 
         if (bio == NULL) {
             SSLerr(SSL_F_SSL_SET_WFD, ERR_R_BUF_LIB);
-            goto err;
+            return 0;
         }
         BIO_set_fd(bio, fd, BIO_NOCLOSE);
-        SSL_set_bio(s, SSL_get_rbio(s), bio);
-    } else
-        SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s));
-    ret = 1;
- err:
-    return (ret);
+        SSL_set0_wbio(s, bio);
+    } else {
+        BIO_up_ref(rbio);
+        SSL_set0_wbio(s, rbio);
+    }
+    return 1;
 }
 
 int SSL_set_rfd(SSL *s, int fd)
 {
-    int ret = 0;
-    BIO *bio = NULL;
+    BIO *wbio = SSL_get_wbio(s);
 
-    if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
-        || ((int)BIO_get_fd(s->wbio, NULL) != fd)) {
-        bio = BIO_new(BIO_s_socket());
+    if (wbio == NULL || BIO_method_type(wbio) != BIO_TYPE_SOCKET
+        || ((int)BIO_get_fd(wbio, NULL) != fd)) {
+        BIO *bio = BIO_new(BIO_s_socket());
 
         if (bio == NULL) {
             SSLerr(SSL_F_SSL_SET_RFD, ERR_R_BUF_LIB);
-            goto err;
+            return 0;
         }
         BIO_set_fd(bio, fd, BIO_NOCLOSE);
-        SSL_set_bio(s, bio, SSL_get_wbio(s));
-    } else
-        SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s));
-    ret = 1;
- err:
-    return (ret);
+        SSL_set0_rbio(s, bio);
+    } else {
+        BIO_up_ref(wbio);
+        SSL_set0_rbio(s, wbio);
+    }
+
+    return 1;
 }
 #endif
 
@@ -822,7 +1418,7 @@ size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
 
 int SSL_get_verify_mode(const SSL *s)
 {
-    return (s->verify_mode);
+    return s->verify_mode;
 }
 
 int SSL_get_verify_depth(const SSL *s)
@@ -831,12 +1427,12 @@ int SSL_get_verify_depth(const SSL *s)
 }
 
 int (*SSL_get_verify_callback(const SSL *s)) (int, X509_STORE_CTX *) {
-    return (s->verify_callback);
+    return s->verify_callback;
 }
 
 int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
 {
-    return (ctx->verify_mode);
+    return ctx->verify_mode;
 }
 
 int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
@@ -845,7 +1441,7 @@ int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
 }
 
 int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx)) (int, X509_STORE_CTX *) {
-    return (ctx->default_verify_callback);
+    return ctx->default_verify_callback;
 }
 
 void SSL_set_verify(SSL *s, int mode,
@@ -863,24 +1459,45 @@ void SSL_set_verify_depth(SSL *s, int depth)
 
 void SSL_set_read_ahead(SSL *s, int yes)
 {
-    s->read_ahead = yes;
+    RECORD_LAYER_set_read_ahead(&s->rlayer, yes);
 }
 
 int SSL_get_read_ahead(const SSL *s)
 {
-    return (s->read_ahead);
+    return RECORD_LAYER_get_read_ahead(&s->rlayer);
 }
 
 int SSL_pending(const SSL *s)
 {
+    size_t pending = s->method->ssl_pending(s);
+
     /*
      * SSL_pending cannot work properly if read-ahead is enabled
      * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is
      * impossible to fix since SSL_pending cannot report errors that may be
      * observed while scanning the new data. (Note that SSL_pending() is
      * often used as a boolean value, so we'd better not return -1.)
+     *
+     * SSL_pending also cannot work properly if the value >INT_MAX. In that case
+     * we just return INT_MAX.
+     */
+    return pending < INT_MAX ? (int)pending : INT_MAX;
+}
+
+int SSL_has_pending(const SSL *s)
+{
+    /*
+     * Similar to SSL_pending() but returns a 1 to indicate that we have
+     * unprocessed data available or 0 otherwise (as opposed to the number of
+     * bytes available). Unlike SSL_pending() this will take into account
+     * read_ahead data. A 1 return simply indicates that we have unprocessed
+     * data. That data may not result in any application data, or we may fail
+     * to parse the records for some reason.
      */
-    return (s->method->ssl_pending(s));
+    if (RECORD_LAYER_processed_read_pending(&s->rlayer))
+        return 1;
+
+    return RECORD_LAYER_read_pending(&s->rlayer);
 }
 
 X509 *SSL_get_peer_certificate(const SSL *s)
@@ -893,78 +1510,75 @@ X509 *SSL_get_peer_certificate(const SSL *s)
         r = s->session->peer;
 
     if (r == NULL)
-        return (r);
+        return r;
 
-    CRYPTO_add(&r->references, 1, CRYPTO_LOCK_X509);
+    X509_up_ref(r);
 
-    return (r);
+    return r;
 }
 
 STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
 {
     STACK_OF(X509) *r;
 
-    if ((s == NULL) || (s->session == NULL)
-        || (s->session->sess_cert == NULL))
+    if ((s == NULL) || (s->session == NULL))
         r = NULL;
     else
-        r = s->session->sess_cert->cert_chain;
+        r = s->session->peer_chain;
 
     /*
      * If we are a client, cert_chain includes the peer's own certificate; if
      * we are a server, it does not.
      */
 
-    return (r);
+    return r;
 }
 
 /*
  * Now in theory, since the calling process own 't' it should be safe to
  * modify.  We need to be able to read f without being hassled
  */
-void SSL_copy_session_id(SSL *t, const SSL *f)
+int SSL_copy_session_id(SSL *t, const SSL *f)
 {
-    CERT *tmp;
-
+    int i;
     /* Do we need to to SSL locking? */
-    SSL_set_session(t, SSL_get_session(f));
+    if (!SSL_set_session(t, SSL_get_session(f))) {
+        return 0;
+    }
 
     /*
-     * what if we are setup as SSLv2 but want to talk SSLv3 or vice-versa
+     * what if we are setup for one protocol version but want to talk another
      */
     if (t->method != f->method) {
-        t->method->ssl_free(t); /* cleanup current */
-        t->method = f->method;  /* change method */
-        t->method->ssl_new(t);  /* setup new */
+        t->method->ssl_free(t);
+        t->method = f->method;
+        if (t->method->ssl_new(t) == 0)
+            return 0;
     }
 
-    tmp = t->cert;
-    if (f->cert != NULL) {
-        CRYPTO_add(&f->cert->references, 1, CRYPTO_LOCK_SSL_CERT);
-        t->cert = f->cert;
-    } else
-        t->cert = NULL;
-    if (tmp != NULL)
-        ssl_cert_free(tmp);
-    SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length);
+    CRYPTO_UP_REF(&f->cert->references, &i, f->cert->lock);
+    ssl_cert_free(t->cert);
+    t->cert = f->cert;
+    if (!SSL_set_session_id_context(t, f->sid_ctx, (int)f->sid_ctx_length)) {
+        return 0;
+    }
+
+    return 1;
 }
 
 /* Fix this so it checks all the valid key/cert options */
 int SSL_CTX_check_private_key(const SSL_CTX *ctx)
 {
-    if ((ctx == NULL) ||
-        (ctx->cert == NULL) || (ctx->cert->key->x509 == NULL)) {
-        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
-               SSL_R_NO_CERTIFICATE_ASSIGNED);
-        return (0);
+    if ((ctx == NULL) || (ctx->cert->key->x509 == NULL)) {
+        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
+        return 0;
     }
     if (ctx->cert->key->privatekey == NULL) {
-        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,
-               SSL_R_NO_PRIVATE_KEY_ASSIGNED);
-        return (0);
+        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
+        return 0;
     }
-    return (X509_check_private_key
-            (ctx->cert->key->x509, ctx->cert->key->privatekey));
+    return X509_check_private_key
+            (ctx->cert->key->x509, ctx->cert->key->privatekey);
 }
 
 /* Fix this function so that it takes an optional type parameter */
@@ -972,87 +1586,460 @@ int SSL_check_private_key(const SSL *ssl)
 {
     if (ssl == NULL) {
         SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, ERR_R_PASSED_NULL_PARAMETER);
-        return (0);
-    }
-    if (ssl->cert == NULL) {
-        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
         return 0;
     }
     if (ssl->cert->key->x509 == NULL) {
         SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_CERTIFICATE_ASSIGNED);
-        return (0);
+        return 0;
     }
     if (ssl->cert->key->privatekey == NULL) {
         SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY, SSL_R_NO_PRIVATE_KEY_ASSIGNED);
-        return (0);
+        return 0;
     }
-    return (X509_check_private_key(ssl->cert->key->x509,
-                                   ssl->cert->key->privatekey));
+    return X509_check_private_key(ssl->cert->key->x509,
+                                   ssl->cert->key->privatekey);
+}
+
+int SSL_waiting_for_async(SSL *s)
+{
+    if (s->job)
+        return 1;
+
+    return 0;
+}
+
+int SSL_get_all_async_fds(SSL *s, OSSL_ASYNC_FD *fds, size_t *numfds)
+{
+    ASYNC_WAIT_CTX *ctx = s->waitctx;
+
+    if (ctx == NULL)
+        return 0;
+    return ASYNC_WAIT_CTX_get_all_fds(ctx, fds, numfds);
+}
+
+int SSL_get_changed_async_fds(SSL *s, OSSL_ASYNC_FD *addfd, size_t *numaddfds,
+                              OSSL_ASYNC_FD *delfd, size_t *numdelfds)
+{
+    ASYNC_WAIT_CTX *ctx = s->waitctx;
+
+    if (ctx == NULL)
+        return 0;
+    return ASYNC_WAIT_CTX_get_changed_fds(ctx, addfd, numaddfds, delfd,
+                                          numdelfds);
 }
 
 int SSL_accept(SSL *s)
 {
-    if (s->handshake_func == 0)
+    if (s->handshake_func == NULL) {
         /* Not properly initialized yet */
         SSL_set_accept_state(s);
+    }
 
-    return (s->method->ssl_accept(s));
+    return SSL_do_handshake(s);
 }
 
 int SSL_connect(SSL *s)
 {
-    if (s->handshake_func == 0)
+    if (s->handshake_func == NULL) {
         /* Not properly initialized yet */
         SSL_set_connect_state(s);
+    }
 
-    return (s->method->ssl_connect(s));
+    return SSL_do_handshake(s);
 }
 
 long SSL_get_default_timeout(const SSL *s)
 {
-    return (s->method->get_timeout());
+    return s->method->get_timeout();
 }
 
-int SSL_read(SSL *s, void *buf, int num)
+static int ssl_start_async_job(SSL *s, struct ssl_async_args *args,
+                               int (*func) (void *))
+{
+    int ret;
+    if (s->waitctx == NULL) {
+        s->waitctx = ASYNC_WAIT_CTX_new();
+        if (s->waitctx == NULL)
+            return -1;
+    }
+    switch (ASYNC_start_job(&s->job, s->waitctx, &ret, func, args,
+                            sizeof(struct ssl_async_args))) {
+    case ASYNC_ERR:
+        s->rwstate = SSL_NOTHING;
+        SSLerr(SSL_F_SSL_START_ASYNC_JOB, SSL_R_FAILED_TO_INIT_ASYNC);
+        return -1;
+    case ASYNC_PAUSE:
+        s->rwstate = SSL_ASYNC_PAUSED;
+        return -1;
+    case ASYNC_NO_JOBS:
+        s->rwstate = SSL_ASYNC_NO_JOBS;
+        return -1;
+    case ASYNC_FINISH:
+        s->job = NULL;
+        return ret;
+    default:
+        s->rwstate = SSL_NOTHING;
+        SSLerr(SSL_F_SSL_START_ASYNC_JOB, ERR_R_INTERNAL_ERROR);
+        /* Shouldn't happen */
+        return -1;
+    }
+}
+
+static int ssl_io_intern(void *vargs)
 {
-    if (s->handshake_func == 0) {
-        SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
+    struct ssl_async_args *args;
+    SSL *s;
+    void *buf;
+    size_t num;
+
+    args = (struct ssl_async_args *)vargs;
+    s = args->s;
+    buf = args->buf;
+    num = args->num;
+    switch (args->type) {
+    case READFUNC:
+        return args->f.func_read(s, buf, num, &s->asyncrw);
+    case WRITEFUNC:
+        return args->f.func_write(s, buf, num, &s->asyncrw);
+    case OTHERFUNC:
+        return args->f.func_other(s);
+    }
+    return -1;
+}
+
+int ssl_read_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
+{
+    if (s->handshake_func == NULL) {
+        SSLerr(SSL_F_SSL_READ_INTERNAL, SSL_R_UNINITIALIZED);
         return -1;
     }
 
     if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
         s->rwstate = SSL_NOTHING;
-        return (0);
+        return 0;
+    }
+
+    if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
+                || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY) {
+        SSLerr(SSL_F_SSL_READ_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+        return 0;
+    }
+    /*
+     * If we are a client and haven't received the ServerHello etc then we
+     * better do that
+     */
+    ossl_statem_check_finish_init(s, 0);
+
+    if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
+        struct ssl_async_args args;
+        int ret;
+
+        args.s = s;
+        args.buf = buf;
+        args.num = num;
+        args.type = READFUNC;
+        args.f.func_read = s->method->ssl_read;
+
+        ret = ssl_start_async_job(s, &args, ssl_io_intern);
+        *readbytes = s->asyncrw;
+        return ret;
+    } else {
+        return s->method->ssl_read(s, buf, num, readbytes);
     }
-    return (s->method->ssl_read(s, buf, num));
 }
 
-int SSL_peek(SSL *s, void *buf, int num)
+int SSL_read(SSL *s, void *buf, int num)
+{
+    int ret;
+    size_t readbytes;
+
+    if (num < 0) {
+        SSLerr(SSL_F_SSL_READ, SSL_R_BAD_LENGTH);
+        return -1;
+    }
+
+    ret = ssl_read_internal(s, buf, (size_t)num, &readbytes);
+
+    /*
+     * The cast is safe here because ret should be <= INT_MAX because num is
+     * <= INT_MAX
+     */
+    if (ret > 0)
+        ret = (int)readbytes;
+
+    return ret;
+}
+
+int SSL_read_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
+{
+    int ret = ssl_read_internal(s, buf, num, readbytes);
+
+    if (ret < 0)
+        ret = 0;
+    return ret;
+}
+
+int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
+{
+    int ret;
+
+    if (!s->server) {
+        SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+        return SSL_READ_EARLY_DATA_ERROR;
+    }
+
+    switch (s->early_data_state) {
+    case SSL_EARLY_DATA_NONE:
+        if (!SSL_in_before(s)) {
+            SSLerr(SSL_F_SSL_READ_EARLY_DATA,
+                   ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+            return SSL_READ_EARLY_DATA_ERROR;
+        }
+        /* fall through */
+
+    case SSL_EARLY_DATA_ACCEPT_RETRY:
+        s->early_data_state = SSL_EARLY_DATA_ACCEPTING;
+        ret = SSL_accept(s);
+        if (ret <= 0) {
+            /* NBIO or error */
+            s->early_data_state = SSL_EARLY_DATA_ACCEPT_RETRY;
+            return SSL_READ_EARLY_DATA_ERROR;
+        }
+        /* fall through */
+
+    case SSL_EARLY_DATA_READ_RETRY:
+        if (s->ext.early_data == SSL_EARLY_DATA_ACCEPTED) {
+            s->early_data_state = SSL_EARLY_DATA_READING;
+            ret = SSL_read_ex(s, buf, num, readbytes);
+            /*
+             * State machine will update early_data_state to
+             * SSL_EARLY_DATA_FINISHED_READING if we get an EndOfEarlyData
+             * message
+             */
+            if (ret > 0 || (ret <= 0 && s->early_data_state
+                                        != SSL_EARLY_DATA_FINISHED_READING)) {
+                s->early_data_state = SSL_EARLY_DATA_READ_RETRY;
+                return ret > 0 ? SSL_READ_EARLY_DATA_SUCCESS
+                               : SSL_READ_EARLY_DATA_ERROR;
+            }
+        } else {
+            s->early_data_state = SSL_EARLY_DATA_FINISHED_READING;
+        }
+        *readbytes = 0;
+        return SSL_READ_EARLY_DATA_FINISH;
+
+    default:
+        SSLerr(SSL_F_SSL_READ_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+        return SSL_READ_EARLY_DATA_ERROR;
+    }
+}
+
+int SSL_get_early_data_status(const SSL *s)
 {
-    if (s->handshake_func == 0) {
-        SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
+    return s->ext.early_data;
+}
+
+static int ssl_peek_internal(SSL *s, void *buf, size_t num, size_t *readbytes)
+{
+    if (s->handshake_func == NULL) {
+        SSLerr(SSL_F_SSL_PEEK_INTERNAL, SSL_R_UNINITIALIZED);
         return -1;
     }
 
     if (s->shutdown & SSL_RECEIVED_SHUTDOWN) {
-        return (0);
+        return 0;
+    }
+    if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
+        struct ssl_async_args args;
+        int ret;
+
+        args.s = s;
+        args.buf = buf;
+        args.num = num;
+        args.type = READFUNC;
+        args.f.func_read = s->method->ssl_peek;
+
+        ret = ssl_start_async_job(s, &args, ssl_io_intern);
+        *readbytes = s->asyncrw;
+        return ret;
+    } else {
+        return s->method->ssl_peek(s, buf, num, readbytes);
     }
-    return (s->method->ssl_peek(s, buf, num));
 }
 
-int SSL_write(SSL *s, const void *buf, int num)
+int SSL_peek(SSL *s, void *buf, int num)
+{
+    int ret;
+    size_t readbytes;
+
+    if (num < 0) {
+        SSLerr(SSL_F_SSL_PEEK, SSL_R_BAD_LENGTH);
+        return -1;
+    }
+
+    ret = ssl_peek_internal(s, buf, (size_t)num, &readbytes);
+
+    /*
+     * The cast is safe here because ret should be <= INT_MAX because num is
+     * <= INT_MAX
+     */
+    if (ret > 0)
+        ret = (int)readbytes;
+
+    return ret;
+}
+
+
+int SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *readbytes)
+{
+    int ret = ssl_peek_internal(s, buf, num, readbytes);
+
+    if (ret < 0)
+        ret = 0;
+    return ret;
+}
+
+int ssl_write_internal(SSL *s, const void *buf, size_t num, size_t *written)
 {
-    if (s->handshake_func == 0) {
-        SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
+    if (s->handshake_func == NULL) {
+        SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_UNINITIALIZED);
         return -1;
     }
 
     if (s->shutdown & SSL_SENT_SHUTDOWN) {
         s->rwstate = SSL_NOTHING;
-        SSLerr(SSL_F_SSL_WRITE, SSL_R_PROTOCOL_IS_SHUTDOWN);
-        return (-1);
+        SSLerr(SSL_F_SSL_WRITE_INTERNAL, SSL_R_PROTOCOL_IS_SHUTDOWN);
+        return -1;
+    }
+
+    if (s->early_data_state == SSL_EARLY_DATA_CONNECT_RETRY
+                || s->early_data_state == SSL_EARLY_DATA_ACCEPT_RETRY
+                || s->early_data_state == SSL_EARLY_DATA_READ_RETRY) {
+        SSLerr(SSL_F_SSL_WRITE_INTERNAL, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+        return 0;
+    }
+    /* If we are a client and haven't sent the Finished we better do that */
+    ossl_statem_check_finish_init(s, 1);
+
+    if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
+        int ret;
+        struct ssl_async_args args;
+
+        args.s = s;
+        args.buf = (void *)buf;
+        args.num = num;
+        args.type = WRITEFUNC;
+        args.f.func_write = s->method->ssl_write;
+
+        ret = ssl_start_async_job(s, &args, ssl_io_intern);
+        *written = s->asyncrw;
+        return ret;
+    } else {
+        return s->method->ssl_write(s, buf, num, written);
+    }
+}
+
+int SSL_write(SSL *s, const void *buf, int num)
+{
+    int ret;
+    size_t written;
+
+    if (num < 0) {
+        SSLerr(SSL_F_SSL_WRITE, SSL_R_BAD_LENGTH);
+        return -1;
+    }
+
+    ret = ssl_write_internal(s, buf, (size_t)num, &written);
+
+    /*
+     * The cast is safe here because ret should be <= INT_MAX because num is
+     * <= INT_MAX
+     */
+    if (ret > 0)
+        ret = (int)written;
+
+    return ret;
+}
+
+int SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *written)
+{
+    int ret = ssl_write_internal(s, buf, num, written);
+
+    if (ret < 0)
+        ret = 0;
+    return ret;
+}
+
+int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
+{
+    int ret, early_data_state;
+    size_t writtmp;
+    uint32_t partialwrite;
+
+    switch (s->early_data_state) {
+    case SSL_EARLY_DATA_NONE:
+        if (s->server
+                || !SSL_in_before(s)
+                || ((s->session == NULL || s->session->ext.max_early_data == 0)
+                     && (s->psk_use_session_cb == NULL))) {
+            SSLerr(SSL_F_SSL_WRITE_EARLY_DATA,
+                   ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+            return 0;
+        }
+        /* fall through */
+
+    case SSL_EARLY_DATA_CONNECT_RETRY:
+        s->early_data_state = SSL_EARLY_DATA_CONNECTING;
+        ret = SSL_connect(s);
+        if (ret <= 0) {
+            /* NBIO or error */
+            s->early_data_state = SSL_EARLY_DATA_CONNECT_RETRY;
+            return 0;
+        }
+        /* fall through */
+
+    case SSL_EARLY_DATA_WRITE_RETRY:
+        s->early_data_state = SSL_EARLY_DATA_WRITING;
+        /*
+         * We disable partial write for early data because we don't keep track
+         * of how many bytes we've written between the SSL_write_ex() call and
+         * the flush if the flush needs to be retried)
+         */
+        partialwrite = s->mode & SSL_MODE_ENABLE_PARTIAL_WRITE;
+        s->mode &= ~SSL_MODE_ENABLE_PARTIAL_WRITE;
+        ret = SSL_write_ex(s, buf, num, &writtmp);
+        s->mode |= partialwrite;
+        if (!ret) {
+            s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
+            return ret;
+        }
+        s->early_data_state = SSL_EARLY_DATA_WRITE_FLUSH;
+        /* fall through */
+
+    case SSL_EARLY_DATA_WRITE_FLUSH:
+        /* The buffering BIO is still in place so we need to flush it */
+        if (statem_flush(s) != 1)
+            return 0;
+        *written = num;
+        s->early_data_state = SSL_EARLY_DATA_WRITE_RETRY;
+        return 1;
+
+    case SSL_EARLY_DATA_FINISHED_READING:
+    case SSL_EARLY_DATA_READ_RETRY:
+        early_data_state = s->early_data_state;
+        /* We are a server writing to an unauthenticated client */
+        s->early_data_state = SSL_EARLY_DATA_UNAUTH_WRITING;
+        ret = SSL_write_ex(s, buf, num, written);
+        /* The buffering BIO is still in place */
+        if (ret)
+            (void)BIO_flush(s->wbio);
+        s->early_data_state = early_data_state;
+        return ret;
+
+    default:
+        SSLerr(SSL_F_SSL_WRITE_EARLY_DATA, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+        return 0;
     }
-    return (s->method->ssl_write(s, buf, num));
 }
 
 int SSL_shutdown(SSL *s)
@@ -1064,37 +2051,96 @@ int SSL_shutdown(SSL *s)
      * (see ssl3_shutdown).
      */
 
-    if (s->handshake_func == 0) {
+    if (s->handshake_func == NULL) {
         SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
         return -1;
     }
 
     if (!SSL_in_init(s)) {
-        return s->method->ssl_shutdown(s);
+        if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
+            struct ssl_async_args args;
+
+            args.s = s;
+            args.type = OTHERFUNC;
+            args.f.func_other = s->method->ssl_shutdown;
+
+            return ssl_start_async_job(s, &args, ssl_io_intern);
+        } else {
+            return s->method->ssl_shutdown(s);
+        }
     } else {
         SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_SHUTDOWN_WHILE_IN_INIT);
         return -1;
     }
 }
 
+int SSL_key_update(SSL *s, int updatetype)
+{
+    /*
+     * TODO(TLS1.3): How will applications know whether TLSv1.3 has been
+     * negotiated, and that it is appropriate to call SSL_key_update() instead
+     * of SSL_renegotiate().
+     */
+    if (!SSL_IS_TLS13(s)) {
+        SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_WRONG_SSL_VERSION);
+        return 0;
+    }
+
+    if (updatetype != SSL_KEY_UPDATE_NOT_REQUESTED
+            && updatetype != SSL_KEY_UPDATE_REQUESTED) {
+        SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_INVALID_KEY_UPDATE_TYPE);
+        return 0;
+    }
+
+    if (!SSL_is_init_finished(s)) {
+        SSLerr(SSL_F_SSL_KEY_UPDATE, SSL_R_STILL_IN_INIT);
+        return 0;
+    }
+
+    ossl_statem_set_in_init(s, 1);
+    s->key_update = updatetype;
+    return 1;
+}
+
+int SSL_get_key_update_type(SSL *s)
+{
+    return s->key_update;
+}
+
 int SSL_renegotiate(SSL *s)
 {
-    if (s->renegotiate == 0)
-        s->renegotiate = 1;
+    if (SSL_IS_TLS13(s)) {
+        SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_WRONG_SSL_VERSION);
+        return 0;
+    }
+
+    if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
+        SSLerr(SSL_F_SSL_RENEGOTIATE, SSL_R_NO_RENEGOTIATION);
+        return 0;
+    }
 
+    s->renegotiate = 1;
     s->new_session = 1;
 
-    return (s->method->ssl_renegotiate(s));
+    return s->method->ssl_renegotiate(s);
 }
 
 int SSL_renegotiate_abbreviated(SSL *s)
 {
-    if (s->renegotiate == 0)
-        s->renegotiate = 1;
+    if (SSL_IS_TLS13(s)) {
+        SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_WRONG_SSL_VERSION);
+        return 0;
+    }
+
+    if ((s->options & SSL_OP_NO_RENEGOTIATION)) {
+        SSLerr(SSL_F_SSL_RENEGOTIATE_ABBREVIATED, SSL_R_NO_RENEGOTIATION);
+        return 0;
+    }
 
+    s->renegotiate = 1;
     s->new_session = 0;
 
-    return (s->method->ssl_renegotiate(s));
+    return s->method->ssl_renegotiate(s);
 }
 
 int SSL_renegotiate_pending(SSL *s)
@@ -1112,34 +2158,46 @@ long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
 
     switch (cmd) {
     case SSL_CTRL_GET_READ_AHEAD:
-        return (s->read_ahead);
+        return RECORD_LAYER_get_read_ahead(&s->rlayer);
     case SSL_CTRL_SET_READ_AHEAD:
-        l = s->read_ahead;
-        s->read_ahead = larg;
-        return (l);
+        l = RECORD_LAYER_get_read_ahead(&s->rlayer);
+        RECORD_LAYER_set_read_ahead(&s->rlayer, larg);
+        return l;
 
     case SSL_CTRL_SET_MSG_CALLBACK_ARG:
         s->msg_callback_arg = parg;
         return 1;
 
-    case SSL_CTRL_OPTIONS:
-        return (s->options |= larg);
-    case SSL_CTRL_CLEAR_OPTIONS:
-        return (s->options &= ~larg);
     case SSL_CTRL_MODE:
         return (s->mode |= larg);
     case SSL_CTRL_CLEAR_MODE:
         return (s->mode &= ~larg);
     case SSL_CTRL_GET_MAX_CERT_LIST:
-        return (s->max_cert_list);
+        return (long)s->max_cert_list;
     case SSL_CTRL_SET_MAX_CERT_LIST:
-        l = s->max_cert_list;
-        s->max_cert_list = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)s->max_cert_list;
+        s->max_cert_list = (size_t)larg;
+        return l;
     case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
         if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
             return 0;
         s->max_send_fragment = larg;
+        if (s->max_send_fragment < s->split_send_fragment)
+            s->split_send_fragment = s->max_send_fragment;
+        return 1;
+    case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
+        if ((size_t)larg > s->max_send_fragment || larg == 0)
+            return 0;
+        s->split_send_fragment = larg;
+        return 1;
+    case SSL_CTRL_SET_MAX_PIPELINES:
+        if (larg < 1 || larg > SSL_MAX_PIPELINES)
+            return 0;
+        s->max_pipelines = larg;
+        if (larg > 1)
+            RECORD_LAYER_set_read_ahead(&s->rlayer, 1);
         return 1;
     case SSL_CTRL_GET_RI_SUPPORT:
         if (s->s3)
@@ -1153,14 +2211,34 @@ long SSL_ctrl(SSL *s, int cmd, long larg, void *parg)
 
     case SSL_CTRL_GET_RAW_CIPHERLIST:
         if (parg) {
-            if (s->cert->ciphers_raw == NULL)
+            if (s->s3->tmp.ciphers_raw == NULL)
                 return 0;
-            *(unsigned char **)parg = s->cert->ciphers_raw;
-            return (int)s->cert->ciphers_rawlen;
-        } else
-            return ssl_put_cipher_by_char(s, NULL, NULL);
+            *(unsigned char **)parg = s->s3->tmp.ciphers_raw;
+            return (int)s->s3->tmp.ciphers_rawlen;
+        } else {
+            return TLS_CIPHER_LEN;
+        }
+    case SSL_CTRL_GET_EXTMS_SUPPORT:
+        if (!s->session || SSL_in_init(s) || ossl_statem_get_in_handshake(s))
+            return -1;
+        if (s->session->flags & SSL_SESS_FLAG_EXTMS)
+            return 1;
+        else
+            return 0;
+    case SSL_CTRL_SET_MIN_PROTO_VERSION:
+        return ssl_check_allowed_versions(larg, s->max_proto_version)
+               && ssl_set_version_bound(s->ctx->method->version, (int)larg,
+                                        &s->min_proto_version);
+    case SSL_CTRL_GET_MIN_PROTO_VERSION:
+        return s->min_proto_version;
+    case SSL_CTRL_SET_MAX_PROTO_VERSION:
+        return ssl_check_allowed_versions(s->min_proto_version, larg)
+               && ssl_set_version_bound(s->ctx->method->version, (int)larg,
+                                        &s->max_proto_version);
+    case SSL_CTRL_GET_MAX_PROTO_VERSION:
+        return s->max_proto_version;
     default:
-        return (s->method->ssl_ctrl(s, cmd, larg, parg));
+        return s->method->ssl_ctrl(s, cmd, larg, parg);
     }
 }
 
@@ -1175,7 +2253,7 @@ long SSL_callback_ctrl(SSL *s, int cmd, void (*fp) (void))
         return 1;
 
     default:
-        return (s->method->ssl_callback_ctrl(s, cmd, fp));
+        return s->method->ssl_callback_ctrl(s, cmd, fp);
     }
 }
 
@@ -1191,8 +2269,8 @@ long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
     if (ctx == NULL) {
         switch (cmd) {
 #ifndef OPENSSL_NO_EC
-        case SSL_CTRL_SET_CURVES_LIST:
-            return tls1_set_curves_list(NULL, NULL, parg);
+        case SSL_CTRL_SET_GROUPS_LIST:
+            return tls1_set_groups_list(NULL, NULL, parg);
 #endif
         case SSL_CTRL_SET_SIGALGS_LIST:
         case SSL_CTRL_SET_CLIENT_SIGALGS_LIST:
@@ -1204,64 +2282,64 @@ long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
 
     switch (cmd) {
     case SSL_CTRL_GET_READ_AHEAD:
-        return (ctx->read_ahead);
+        return ctx->read_ahead;
     case SSL_CTRL_SET_READ_AHEAD:
         l = ctx->read_ahead;
         ctx->read_ahead = larg;
-        return (l);
+        return l;
 
     case SSL_CTRL_SET_MSG_CALLBACK_ARG:
         ctx->msg_callback_arg = parg;
         return 1;
 
     case SSL_CTRL_GET_MAX_CERT_LIST:
-        return (ctx->max_cert_list);
+        return (long)ctx->max_cert_list;
     case SSL_CTRL_SET_MAX_CERT_LIST:
-        l = ctx->max_cert_list;
-        ctx->max_cert_list = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)ctx->max_cert_list;
+        ctx->max_cert_list = (size_t)larg;
+        return l;
 
     case SSL_CTRL_SET_SESS_CACHE_SIZE:
-        l = ctx->session_cache_size;
-        ctx->session_cache_size = larg;
-        return (l);
+        if (larg < 0)
+            return 0;
+        l = (long)ctx->session_cache_size;
+        ctx->session_cache_size = (size_t)larg;
+        return l;
     case SSL_CTRL_GET_SESS_CACHE_SIZE:
-        return (ctx->session_cache_size);
+        return (long)ctx->session_cache_size;
     case SSL_CTRL_SET_SESS_CACHE_MODE:
         l = ctx->session_cache_mode;
         ctx->session_cache_mode = larg;
-        return (l);
+        return l;
     case SSL_CTRL_GET_SESS_CACHE_MODE:
-        return (ctx->session_cache_mode);
+        return ctx->session_cache_mode;
 
     case SSL_CTRL_SESS_NUMBER:
-        return (lh_SSL_SESSION_num_items(ctx->sessions));
+        return lh_SSL_SESSION_num_items(ctx->sessions);
     case SSL_CTRL_SESS_CONNECT:
-        return (ctx->stats.sess_connect);
+        return tsan_load(&ctx->stats.sess_connect);
     case SSL_CTRL_SESS_CONNECT_GOOD:
-        return (ctx->stats.sess_connect_good);
+        return tsan_load(&ctx->stats.sess_connect_good);
     case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
-        return (ctx->stats.sess_connect_renegotiate);
+        return tsan_load(&ctx->stats.sess_connect_renegotiate);
     case SSL_CTRL_SESS_ACCEPT:
-        return (ctx->stats.sess_accept);
+        return tsan_load(&ctx->stats.sess_accept);
     case SSL_CTRL_SESS_ACCEPT_GOOD:
-        return (ctx->stats.sess_accept_good);
+        return tsan_load(&ctx->stats.sess_accept_good);
     case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
-        return (ctx->stats.sess_accept_renegotiate);
+        return tsan_load(&ctx->stats.sess_accept_renegotiate);
     case SSL_CTRL_SESS_HIT:
-        return (ctx->stats.sess_hit);
+        return tsan_load(&ctx->stats.sess_hit);
     case SSL_CTRL_SESS_CB_HIT:
-        return (ctx->stats.sess_cb_hit);
+        return tsan_load(&ctx->stats.sess_cb_hit);
     case SSL_CTRL_SESS_MISSES:
-        return (ctx->stats.sess_miss);
+        return tsan_load(&ctx->stats.sess_miss);
     case SSL_CTRL_SESS_TIMEOUTS:
-        return (ctx->stats.sess_timeout);
+        return tsan_load(&ctx->stats.sess_timeout);
     case SSL_CTRL_SESS_CACHE_FULL:
-        return (ctx->stats.sess_cache_full);
-    case SSL_CTRL_OPTIONS:
-        return (ctx->options |= larg);
-    case SSL_CTRL_CLEAR_OPTIONS:
-        return (ctx->options &= ~larg);
+        return tsan_load(&ctx->stats.sess_cache_full);
     case SSL_CTRL_MODE:
         return (ctx->mode |= larg);
     case SSL_CTRL_CLEAR_MODE:
@@ -1270,13 +2348,37 @@ long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
         if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
             return 0;
         ctx->max_send_fragment = larg;
+        if (ctx->max_send_fragment < ctx->split_send_fragment)
+            ctx->split_send_fragment = ctx->max_send_fragment;
+        return 1;
+    case SSL_CTRL_SET_SPLIT_SEND_FRAGMENT:
+        if ((size_t)larg > ctx->max_send_fragment || larg == 0)
+            return 0;
+        ctx->split_send_fragment = larg;
+        return 1;
+    case SSL_CTRL_SET_MAX_PIPELINES:
+        if (larg < 1 || larg > SSL_MAX_PIPELINES)
+            return 0;
+        ctx->max_pipelines = larg;
         return 1;
     case SSL_CTRL_CERT_FLAGS:
         return (ctx->cert->cert_flags |= larg);
     case SSL_CTRL_CLEAR_CERT_FLAGS:
         return (ctx->cert->cert_flags &= ~larg);
+    case SSL_CTRL_SET_MIN_PROTO_VERSION:
+        return ssl_check_allowed_versions(larg, ctx->max_proto_version)
+               && ssl_set_version_bound(ctx->method->version, (int)larg,
+                                        &ctx->min_proto_version);
+    case SSL_CTRL_GET_MIN_PROTO_VERSION:
+        return ctx->min_proto_version;
+    case SSL_CTRL_SET_MAX_PROTO_VERSION:
+        return ssl_check_allowed_versions(ctx->min_proto_version, larg)
+               && ssl_set_version_bound(ctx->method->version, (int)larg,
+                                        &ctx->max_proto_version);
+    case SSL_CTRL_GET_MAX_PROTO_VERSION:
+        return ctx->max_proto_version;
     default:
-        return (ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg));
+        return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg);
     }
 }
 
@@ -1291,31 +2393,27 @@ long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp) (void))
         return 1;
 
     default:
-        return (ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp));
+        return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp);
     }
 }
 
 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
 {
-    long l;
-
-    l = a->id - b->id;
-    if (l == 0L)
-        return (0);
-    else
-        return ((l > 0) ? 1 : -1);
+    if (a->id > b->id)
+        return 1;
+    if (a->id < b->id)
+        return -1;
+    return 0;
 }
 
 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER *const *ap,
                           const SSL_CIPHER *const *bp)
 {
-    long l;
-
-    l = (*ap)->id - (*bp)->id;
-    if (l == 0L)
-        return (0);
-    else
-        return ((l > 0) ? 1 : -1);
+    if ((*ap)->id > (*bp)->id)
+        return 1;
+    if ((*ap)->id < (*bp)->id)
+        return -1;
+    return 0;
 }
 
 /** return a STACK of the ciphers available for the SSL and in order of
@@ -1324,12 +2422,45 @@ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
 {
     if (s != NULL) {
         if (s->cipher_list != NULL) {
-            return (s->cipher_list);
+            return s->cipher_list;
         } else if ((s->ctx != NULL) && (s->ctx->cipher_list != NULL)) {
-            return (s->ctx->cipher_list);
+            return s->ctx->cipher_list;
         }
     }
-    return (NULL);
+    return NULL;
+}
+
+STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
+{
+    if ((s == NULL) || (s->session == NULL) || !s->server)
+        return NULL;
+    return s->session->ciphers;
+}
+
+STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
+{
+    STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;
+    int i;
+
+    ciphers = SSL_get_ciphers(s);
+    if (!ciphers)
+        return NULL;
+    if (!ssl_set_client_disabled(s))
+        return NULL;
+    for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
+        const SSL_CIPHER *c = sk_SSL_CIPHER_value(ciphers, i);
+        if (!ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED, 0)) {
+            if (!sk)
+                sk = sk_SSL_CIPHER_new_null();
+            if (!sk)
+                return NULL;
+            if (!sk_SSL_CIPHER_push(sk, c)) {
+                sk_SSL_CIPHER_free(sk);
+                return NULL;
+            }
+        }
+    }
+    return sk;
 }
 
 /** return a STACK of the ciphers available for the SSL and in order of
@@ -1338,29 +2469,38 @@ STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)
 {
     if (s != NULL) {
         if (s->cipher_list_by_id != NULL) {
-            return (s->cipher_list_by_id);
+            return s->cipher_list_by_id;
         } else if ((s->ctx != NULL) && (s->ctx->cipher_list_by_id != NULL)) {
-            return (s->ctx->cipher_list_by_id);
+            return s->ctx->cipher_list_by_id;
         }
     }
-    return (NULL);
+    return NULL;
 }
 
 /** The old interface to get the same thing as SSL_get_ciphers() */
 const char *SSL_get_cipher_list(const SSL *s, int n)
 {
-    SSL_CIPHER *c;
+    const SSL_CIPHER *c;
     STACK_OF(SSL_CIPHER) *sk;
 
     if (s == NULL)
-        return (NULL);
+        return NULL;
     sk = SSL_get_ciphers(s);
     if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))
-        return (NULL);
+        return NULL;
     c = sk_SSL_CIPHER_value(sk, n);
     if (c == NULL)
-        return (NULL);
-    return (c->name);
+        return NULL;
+    return c->name;
+}
+
+/** return a STACK of the ciphers available for the SSL_CTX and in order of
+ * preference */
+STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx)
+{
+    if (ctx != NULL)
+        return ctx->cipher_list;
+    return NULL;
 }
 
 /** specify the ciphers to be used by default by the SSL_CTX */
@@ -1368,8 +2508,9 @@ int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
 {
     STACK_OF(SSL_CIPHER) *sk;
 
-    sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
-                                &ctx->cipher_list_by_id, str, ctx->cert);
+    sk = ssl_create_cipher_list(ctx->method, ctx->tls13_ciphersuites,
+                                &ctx->cipher_list, &ctx->cipher_list_by_id, str,
+                                ctx->cert);
     /*
      * ssl_create_cipher_list may return an empty stack if it was unable to
      * find a cipher matching the given rule string (for example if the rule
@@ -1391,8 +2532,9 @@ int SSL_set_cipher_list(SSL *s, const char *str)
 {
     STACK_OF(SSL_CIPHER) *sk;
 
-    sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
-                                &s->cipher_list_by_id, str, s->cert);
+    sk = ssl_create_cipher_list(s->ctx->method, s->tls13_ciphersuites,
+                                &s->cipher_list, &s->cipher_list_by_id, str,
+                                s->cert);
     /* see comment in SSL_CTX_set_cipher_list */
     if (sk == NULL)
         return 0;
@@ -1403,29 +2545,37 @@ int SSL_set_cipher_list(SSL *s, const char *str)
     return 1;
 }
 
-/* works well for SSLv2, not so good for SSLv3 */
-char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
+char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size)
 {
     char *p;
-    STACK_OF(SSL_CIPHER) *sk;
-    SSL_CIPHER *c;
+    STACK_OF(SSL_CIPHER) *clntsk, *srvrsk;
+    const SSL_CIPHER *c;
     int i;
 
-    if ((s->session == NULL) || (s->session->ciphers == NULL) || (len < 2))
-        return (NULL);
+    if (!s->server
+            || s->session == NULL
+            || s->session->ciphers == NULL
+            || size < 2)
+        return NULL;
 
     p = buf;
-    sk = s->session->ciphers;
+    clntsk = s->session->ciphers;
+    srvrsk = SSL_get_ciphers(s);
+    if (clntsk == NULL || srvrsk == NULL)
+        return NULL;
 
-    if (sk_SSL_CIPHER_num(sk) == 0)
+    if (sk_SSL_CIPHER_num(clntsk) == 0 || sk_SSL_CIPHER_num(srvrsk) == 0)
         return NULL;
 
-    for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
+    for (i = 0; i < sk_SSL_CIPHER_num(clntsk); i++) {
         int n;
 
-        c = sk_SSL_CIPHER_value(sk, i);
+        c = sk_SSL_CIPHER_value(clntsk, i);
+        if (sk_SSL_CIPHER_find(srvrsk, c) < 0)
+            continue;
+
         n = strlen(c->name);
-        if (n + 1 > len) {
+        if (n + 1 > size) {
             if (p != buf)
                 --p;
             *p = '\0';
@@ -1434,174 +2584,12 @@ char *SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
         strcpy(p, c->name);
         p += n;
         *(p++) = ':';
-        len -= n + 1;
+        size -= n + 1;
     }
     p[-1] = '\0';
-    return (buf);
-}
-
-int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
-                             unsigned char *p,
-                             int (*put_cb) (const SSL_CIPHER *,
-                                            unsigned char *))
-{
-    int i, j = 0;
-    SSL_CIPHER *c;
-    CERT *ct = s->cert;
-    unsigned char *q;
-    int empty_reneg_info_scsv = !s->renegotiate;
-    /* Set disabled masks for this session */
-    ssl_set_client_disabled(s);
-
-    if (sk == NULL)
-        return (0);
-    q = p;
-    if (put_cb == NULL)
-        put_cb = s->method->put_cipher_by_char;
-
-    for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
-        c = sk_SSL_CIPHER_value(sk, i);
-        /* Skip disabled ciphers */
-        if (c->algorithm_ssl & ct->mask_ssl ||
-            c->algorithm_mkey & ct->mask_k || c->algorithm_auth & ct->mask_a)
-            continue;
-#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-        if (c->id == SSL3_CK_SCSV) {
-            if (!empty_reneg_info_scsv)
-                continue;
-            else
-                empty_reneg_info_scsv = 0;
-        }
-#endif
-        j = put_cb(c, p);
-        p += j;
-    }
-    /*
-     * If p == q, no ciphers; caller indicates an error. Otherwise, add
-     * applicable SCSVs.
-     */
-    if (p != q) {
-        if (empty_reneg_info_scsv) {
-            static SSL_CIPHER scsv = {
-                0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
-            };
-            j = put_cb(&scsv, p);
-            p += j;
-#ifdef OPENSSL_RI_DEBUG
-            fprintf(stderr,
-                    "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
-#endif
-        }
-        if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
-            static SSL_CIPHER scsv = {
-                0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
-            };
-            j = put_cb(&scsv, p);
-            p += j;
-        }
-    }
-
-    return (p - q);
-}
-
-STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s, unsigned char *p,
-                                               int num,
-                                               STACK_OF(SSL_CIPHER) **skp)
-{
-    const SSL_CIPHER *c;
-    STACK_OF(SSL_CIPHER) *sk;
-    int i, n;
-
-    if (s->s3)
-        s->s3->send_connection_binding = 0;
-
-    n = ssl_put_cipher_by_char(s, NULL, NULL);
-    if (n == 0 || (num % n) != 0) {
-        SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
-               SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
-        return (NULL);
-    }
-    if ((skp == NULL) || (*skp == NULL)) {
-        sk = sk_SSL_CIPHER_new_null(); /* change perhaps later */
-        if(sk == NULL) {
-            SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
-            return NULL;
-        }
-    } else {
-        sk = *skp;
-        sk_SSL_CIPHER_zero(sk);
-    }
-
-    if (s->cert->ciphers_raw)
-        OPENSSL_free(s->cert->ciphers_raw);
-    s->cert->ciphers_raw = BUF_memdup(p, num);
-    if (s->cert->ciphers_raw == NULL) {
-        SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
-        goto err;
-    }
-    s->cert->ciphers_rawlen = (size_t)num;
-
-    for (i = 0; i < num; i += n) {
-        /* Check for TLS_EMPTY_RENEGOTIATION_INFO_SCSV */
-        if (s->s3 && (n != 3 || !p[0]) &&
-            (p[n - 2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
-            (p[n - 1] == (SSL3_CK_SCSV & 0xff))) {
-            /* SCSV fatal if renegotiating */
-            if (s->renegotiate) {
-                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
-                       SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
-                ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
-                goto err;
-            }
-            s->s3->send_connection_binding = 1;
-            p += n;
-#ifdef OPENSSL_RI_DEBUG
-            fprintf(stderr, "SCSV received by server\n");
-#endif
-            continue;
-        }
-
-        /* Check for TLS_FALLBACK_SCSV */
-        if ((n != 3 || !p[0]) &&
-            (p[n - 2] == ((SSL3_CK_FALLBACK_SCSV >> 8) & 0xff)) &&
-            (p[n - 1] == (SSL3_CK_FALLBACK_SCSV & 0xff))) {
-            /*
-             * The SCSV indicates that the client previously tried a higher
-             * version. Fail if the current version is an unexpected
-             * downgrade.
-             */
-            if (!SSL_ctrl(s, SSL_CTRL_CHECK_PROTO_VERSION, 0, NULL)) {
-                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
-                       SSL_R_INAPPROPRIATE_FALLBACK);
-                if (s->s3)
-                    ssl3_send_alert(s, SSL3_AL_FATAL,
-                                    SSL_AD_INAPPROPRIATE_FALLBACK);
-                goto err;
-            }
-            p += n;
-            continue;
-        }
-
-        c = ssl_get_cipher_by_char(s, p);
-        p += n;
-        if (c != NULL) {
-            if (!sk_SSL_CIPHER_push(sk, c)) {
-                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
-                goto err;
-            }
-        }
-    }
-
-    if (skp != NULL)
-        *skp = sk;
-    return (sk);
- err:
-    if ((skp == NULL) || (*skp == NULL))
-        sk_SSL_CIPHER_free(sk);
-    return (NULL);
+    return buf;
 }
 
-#ifndef OPENSSL_NO_TLSEXT
 /** return a servername extension value if provided in Client Hello, or NULL.
  * So far, only host_name types are defined (RFC 3546).
  */
@@ -1611,15 +2599,22 @@ const char *SSL_get_servername(const SSL *s, const int type)
     if (type != TLSEXT_NAMETYPE_host_name)
         return NULL;
 
-    return s->session && !s->tlsext_hostname ?
-        s->session->tlsext_hostname : s->tlsext_hostname;
+    /*
+     * SNI is not negotiated in pre-TLS-1.3 resumption flows, so fake up an
+     * SNI value to return if we are resuming/resumed.  N.B. that we still
+     * call the relevant callbacks for such resumption flows, and callbacks
+     * might error out if there is not a SNI value available.
+     */
+    if (s->hit)
+        return s->session->ext.hostname;
+    return s->ext.hostname;
 }
 
 int SSL_get_servername_type(const SSL *s)
 {
     if (s->session
-        && (!s->tlsext_hostname ? s->session->
-            tlsext_hostname : s->tlsext_hostname))
+        && (!s->ext.hostname ? s->session->
+            ext.hostname : s->ext.hostname))
         return TLSEXT_NAMETYPE_host_name;
     return -1;
 }
@@ -1635,7 +2630,7 @@ int SSL_get_servername_type(const SSL *s)
  * is indicated to the callback. In this case, the client application has to
  * abort the connection or have a default application level protocol. 2) If
  * the server supports NPN, but advertises an empty list then the client
- * selects the first protcol in its list, but indicates via the API that this
+ * selects the first protocol in its list, but indicates via the API that this
  * fallback case was enacted. 3) Otherwise, the client finds the first
  * protocol in the server's list that it supports and selects this protocol.
  * This is because it's assumed that the server has better information about
@@ -1647,8 +2642,7 @@ int SSL_get_servername_type(const SSL *s)
 int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
                           const unsigned char *server,
                           unsigned int server_len,
-                          const unsigned char *client,
-                          unsigned int client_len)
+                          const unsigned char *client, unsigned int client_len)
 {
     unsigned int i, j;
     const unsigned char *result;
@@ -1683,7 +2677,7 @@ int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
     return status;
 }
 
-# ifndef OPENSSL_NO_NEXTPROTONEG
+#ifndef OPENSSL_NO_NEXTPROTONEG
 /*
  * SSL_get0_next_proto_negotiated sets *data and *len to point to the
  * client's requested protocol for this connection and returns 0. If the
@@ -1695,16 +2689,16 @@ int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
 void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
                                     unsigned *len)
 {
-    *data = s->next_proto_negotiated;
+    *data = s->ext.npn;
     if (!*data) {
         *len = 0;
     } else {
-        *len = s->next_proto_negotiated_len;
+        *len = (unsigned int)s->ext.npn_len;
     }
 }
 
 /*
- * SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when
+ * SSL_CTX_set_npn_advertised_cb sets a callback that is called when
  * a TLS server needs a list of supported protocols for Next Protocol
  * Negotiation. The returned list must be in wire format.  The list is
  * returned by setting |out| to point to it and |outlen| to its length. This
@@ -1713,15 +2707,12 @@ void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
  * wishes to advertise. Otherwise, no such extension will be included in the
  * ServerHello.
  */
-void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx,
-                                           int (*cb) (SSL *ssl,
-                                                      const unsigned char
-                                                      **out,
-                                                      unsigned int *outlen,
-                                                      void *arg), void *arg)
+void SSL_CTX_set_npn_advertised_cb(SSL_CTX *ctx,
+                                   SSL_CTX_npn_advertised_cb_func cb,
+                                   void *arg)
 {
-    ctx->next_protos_advertised_cb = cb;
-    ctx->next_protos_advertised_cb_arg = arg;
+    ctx->ext.npn_advertised_cb = cb;
+    ctx->ext.npn_advertised_cb_arg = arg;
 }
 
 /*
@@ -1734,17 +2725,14 @@ void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx,
  * select a protocol. It is fatal to the connection if this callback returns
  * a value other than SSL_TLSEXT_ERR_OK.
  */
-void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx,
-                                      int (*cb) (SSL *s, unsigned char **out,
-                                                 unsigned char *outlen,
-                                                 const unsigned char *in,
-                                                 unsigned int inlen,
-                                                 void *arg), void *arg)
+void SSL_CTX_set_npn_select_cb(SSL_CTX *ctx,
+                               SSL_CTX_npn_select_cb_func cb,
+                               void *arg)
 {
-    ctx->next_proto_select_cb = cb;
-    ctx->next_proto_select_cb_arg = arg;
+    ctx->ext.npn_select_cb = cb;
+    ctx->ext.npn_select_cb_arg = arg;
 }
-# endif
+#endif
 
 /*
  * SSL_CTX_set_alpn_protos sets the ALPN protocol list on |ctx| to |protos|.
@@ -1752,16 +2740,15 @@ void SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx,
  * length-prefixed strings). Returns 0 on success.
  */
 int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
-                            unsigned protos_len)
+                            unsigned int protos_len)
 {
-    if (ctx->alpn_client_proto_list)
-        OPENSSL_free(ctx->alpn_client_proto_list);
-
-    ctx->alpn_client_proto_list = OPENSSL_malloc(protos_len);
-    if (!ctx->alpn_client_proto_list)
+    OPENSSL_free(ctx->ext.alpn);
+    ctx->ext.alpn = OPENSSL_memdup(protos, protos_len);
+    if (ctx->ext.alpn == NULL) {
+        SSLerr(SSL_F_SSL_CTX_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
         return 1;
-    memcpy(ctx->alpn_client_proto_list, protos, protos_len);
-    ctx->alpn_client_proto_list_len = protos_len;
+    }
+    ctx->ext.alpn_len = protos_len;
 
     return 0;
 }
@@ -1772,16 +2759,15 @@ int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
  * length-prefixed strings). Returns 0 on success.
  */
 int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
-                        unsigned protos_len)
+                        unsigned int protos_len)
 {
-    if (ssl->alpn_client_proto_list)
-        OPENSSL_free(ssl->alpn_client_proto_list);
-
-    ssl->alpn_client_proto_list = OPENSSL_malloc(protos_len);
-    if (!ssl->alpn_client_proto_list)
+    OPENSSL_free(ssl->ext.alpn);
+    ssl->ext.alpn = OPENSSL_memdup(protos, protos_len);
+    if (ssl->ext.alpn == NULL) {
+        SSLerr(SSL_F_SSL_SET_ALPN_PROTOS, ERR_R_MALLOC_FAILURE);
         return 1;
-    memcpy(ssl->alpn_client_proto_list, protos, protos_len);
-    ssl->alpn_client_proto_list_len = protos_len;
+    }
+    ssl->ext.alpn_len = protos_len;
 
     return 0;
 }
@@ -1792,25 +2778,21 @@ int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
  * from the client's list of offered protocols.
  */
 void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx,
-                                int (*cb) (SSL *ssl,
-                                           const unsigned char **out,
-                                           unsigned char *outlen,
-                                           const unsigned char *in,
-                                           unsigned int inlen,
-                                           void *arg), void *arg)
+                                SSL_CTX_alpn_select_cb_func cb,
+                                void *arg)
 {
-    ctx->alpn_select_cb = cb;
-    ctx->alpn_select_cb_arg = arg;
+    ctx->ext.alpn_select_cb = cb;
+    ctx->ext.alpn_select_cb_arg = arg;
 }
 
 /*
- * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from
- * |ssl|. On return it sets |*data| to point to |*len| bytes of protocol name
+ * SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|.
+ * On return it sets |*data| to point to |*len| bytes of protocol name
  * (not including the leading length-prefix byte). If the server didn't
  * respond with a negotiated protocol then |*len| will be zero.
  */
 void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
-                            unsigned *len)
+                            unsigned int *len)
 {
     *data = NULL;
     if (ssl->s3)
@@ -1818,11 +2800,9 @@ void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
     if (*data == NULL)
         *len = 0;
     else
-        *len = ssl->s3->alpn_selected_len;
+        *len = (unsigned int)ssl->s3->alpn_selected_len;
 }
 
-#endif                          /* !OPENSSL_NO_TLSEXT */
-
 int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
                                const char *label, size_t llen,
                                const unsigned char *context, size_t contextlen,
@@ -1836,6 +2816,18 @@ int SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
                                                        contextlen, use_context);
 }
 
+int SSL_export_keying_material_early(SSL *s, unsigned char *out, size_t olen,
+                                     const char *label, size_t llen,
+                                     const unsigned char *context,
+                                     size_t contextlen)
+{
+    if (s->version != TLS1_3_VERSION)
+        return 0;
+
+    return tls13_export_keying_material_early(s, out, olen, label, llen,
+                                              context, contextlen);
+}
+
 static unsigned long ssl_session_hash(const SSL_SESSION *a)
 {
     const unsigned char *session_id = a->session_id;
@@ -1853,7 +2845,7 @@ static unsigned long ssl_session_hash(const SSL_SESSION *a)
         ((unsigned long)session_id[1] << 8L) |
         ((unsigned long)session_id[2] << 16L) |
         ((unsigned long)session_id[3] << 24L);
-    return (l);
+    return l;
 }
 
 /*
@@ -1866,10 +2858,10 @@ static unsigned long ssl_session_hash(const SSL_SESSION *a)
 static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
 {
     if (a->ssl_version != b->ssl_version)
-        return (1);
+        return 1;
     if (a->session_id_length != b->session_id_length)
-        return (1);
-    return (memcmp(a->session_id, b->session_id, a->session_id_length));
+        return 1;
+    return memcmp(a->session_id, b->session_id, a->session_id_length);
 }
 
 /*
@@ -1878,8 +2870,6 @@ static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
  * variable. The reason is that the functions aren't static, they're exposed
  * via ssl.h.
  */
-static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
-static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
 
 SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
 {
@@ -1887,102 +2877,68 @@ SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
 
     if (meth == NULL) {
         SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_NULL_SSL_METHOD_PASSED);
-        return (NULL);
-    }
-#ifdef OPENSSL_FIPS
-    if (FIPS_mode() && (meth->version < TLS1_VERSION)) {
-        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
         return NULL;
     }
-#endif
+
+    if (!OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS, NULL))
+        return NULL;
 
     if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
         SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
         goto err;
     }
-    ret = (SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
+    ret = OPENSSL_zalloc(sizeof(*ret));
     if (ret == NULL)
         goto err;
 
-    memset(ret, 0, sizeof(SSL_CTX));
-
     ret->method = meth;
-
-    ret->cert_store = NULL;
+    ret->min_proto_version = 0;
+    ret->max_proto_version = 0;
+    ret->mode = SSL_MODE_AUTO_RETRY;
     ret->session_cache_mode = SSL_SESS_CACHE_SERVER;
     ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
-    ret->session_cache_head = NULL;
-    ret->session_cache_tail = NULL;
-
-    /* We take the system default */
+    /* We take the system default. */
     ret->session_timeout = meth->get_timeout();
-
-    ret->new_session_cb = 0;
-    ret->remove_session_cb = 0;
-    ret->get_session_cb = 0;
-    ret->generate_session_id = 0;
-
-    memset((char *)&ret->stats, 0, sizeof(ret->stats));
-
     ret->references = 1;
-    ret->quiet_shutdown = 0;
-
-/*  ret->cipher=NULL;*/
-/*-
-    ret->s2->challenge=NULL;
-    ret->master_key=NULL;
-    ret->key_arg=NULL;
-    ret->s2->conn_id=NULL; */
-
-    ret->info_callback = NULL;
-
-    ret->app_verify_callback = 0;
-    ret->app_verify_arg = NULL;
-
+    ret->lock = CRYPTO_THREAD_lock_new();
+    if (ret->lock == NULL) {
+        SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
+        OPENSSL_free(ret);
+        return NULL;
+    }
     ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
-    ret->read_ahead = 0;
-    ret->msg_callback = 0;
-    ret->msg_callback_arg = NULL;
     ret->verify_mode = SSL_VERIFY_NONE;
-#if 0
-    ret->verify_depth = -1;     /* Don't impose a limit (but x509_lu.c does) */
-#endif
-    ret->sid_ctx_length = 0;
-    ret->default_verify_callback = NULL;
     if ((ret->cert = ssl_cert_new()) == NULL)
         goto err;
 
-    ret->default_passwd_callback = 0;
-    ret->default_passwd_callback_userdata = NULL;
-    ret->client_cert_cb = 0;
-    ret->app_gen_cookie_cb = 0;
-    ret->app_verify_cookie_cb = 0;
-
-    ret->sessions = lh_SSL_SESSION_new();
+    ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp);
     if (ret->sessions == NULL)
         goto err;
     ret->cert_store = X509_STORE_new();
     if (ret->cert_store == NULL)
         goto err;
+#ifndef OPENSSL_NO_CT
+    ret->ctlog_store = CTLOG_STORE_new();
+    if (ret->ctlog_store == NULL)
+        goto err;
+#endif
 
-    ssl_create_cipher_list(ret->method,
-                           &ret->cipher_list, &ret->cipher_list_by_id,
-                           meth->version ==
-                           SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST,
-                           ret->cert);
-    if (ret->cipher_list == NULL || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
+    if (!SSL_CTX_set_ciphersuites(ret, TLS_DEFAULT_CIPHERSUITES))
+        goto err;
+
+    if (!ssl_create_cipher_list(ret->method,
+                                ret->tls13_ciphersuites,
+                                &ret->cipher_list, &ret->cipher_list_by_id,
+                                SSL_DEFAULT_CIPHER_LIST, ret->cert)
+        || sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
         SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_LIBRARY_HAS_NO_CIPHERS);
         goto err2;
     }
 
     ret->param = X509_VERIFY_PARAM_new();
-    if (!ret->param)
+    if (ret->param == NULL)
         goto err;
 
-    if ((ret->rsa_md5 = EVP_get_digestbyname("ssl2-md5")) == NULL) {
-        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
-        goto err2;
-    }
     if ((ret->md5 = EVP_get_digestbyname("ssl3-md5")) == NULL) {
         SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
         goto err2;
@@ -1992,60 +2948,40 @@ SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
         goto err2;
     }
 
-    if ((ret->client_CA = sk_X509_NAME_new_null()) == NULL)
+    if ((ret->ca_names = sk_X509_NAME_new_null()) == NULL)
         goto err;
 
-    CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);
+    if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data))
+        goto err;
+
+    if ((ret->ext.secure = OPENSSL_secure_zalloc(sizeof(*ret->ext.secure))) == NULL)
+        goto err;
 
-    ret->extra_certs = NULL;
     /* No compression for DTLS */
     if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS))
         ret->comp_methods = SSL_COMP_get_compression_methods();
 
     ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
-
-#ifndef OPENSSL_NO_TLSEXT
-    ret->tlsext_servername_callback = 0;
-    ret->tlsext_servername_arg = NULL;
-    /* Setup RFC4507 ticket keys */
-    if ((RAND_bytes(ret->tlsext_tick_key_name, 16) <= 0)
-        || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
-        || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
+    ret->split_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
+
+    /* Setup RFC5077 ticket keys */
+    if ((RAND_bytes(ret->ext.tick_key_name,
+                    sizeof(ret->ext.tick_key_name)) <= 0)
+        || (RAND_priv_bytes(ret->ext.secure->tick_hmac_key,
+                       sizeof(ret->ext.secure->tick_hmac_key)) <= 0)
+        || (RAND_priv_bytes(ret->ext.secure->tick_aes_key,
+                       sizeof(ret->ext.secure->tick_aes_key)) <= 0))
         ret->options |= SSL_OP_NO_TICKET;
 
-    ret->tlsext_status_cb = 0;
-    ret->tlsext_status_arg = NULL;
+    if (RAND_priv_bytes(ret->ext.cookie_hmac_key,
+                   sizeof(ret->ext.cookie_hmac_key)) <= 0)
+        goto err;
 
-# ifndef OPENSSL_NO_NEXTPROTONEG
-    ret->next_protos_advertised_cb = 0;
-    ret->next_proto_select_cb = 0;
-# endif
-#endif
-#ifndef OPENSSL_NO_PSK
-    ret->psk_identity_hint = NULL;
-    ret->psk_client_callback = NULL;
-    ret->psk_server_callback = NULL;
-#endif
 #ifndef OPENSSL_NO_SRP
-    SSL_CTX_SRP_CTX_init(ret);
-#endif
-#ifndef OPENSSL_NO_BUF_FREELISTS
-    ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
-    ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
-    if (!ret->rbuf_freelist)
+    if (!SSL_CTX_SRP_CTX_init(ret))
         goto err;
-    ret->rbuf_freelist->chunklen = 0;
-    ret->rbuf_freelist->len = 0;
-    ret->rbuf_freelist->head = NULL;
-    ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
-    if (!ret->wbuf_freelist)
-        goto err;
-    ret->wbuf_freelist->chunklen = 0;
-    ret->wbuf_freelist->len = 0;
-    ret->wbuf_freelist->head = NULL;
 #endif
 #ifndef OPENSSL_NO_ENGINE
-    ret->client_cert_engine = NULL;
 # ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
 #  define eng_strx(x)     #x
 #  define eng_str(x)      eng_strx(x)
@@ -2068,41 +3004,70 @@ SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
      * deployed might change this.
      */
     ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
+    /*
+     * Disable compression by default to prevent CRIME. Applications can
+     * re-enable compression by configuring
+     * SSL_CTX_clear_options(ctx, SSL_OP_NO_COMPRESSION);
+     * or by using the SSL_CONF library. Similarly we also enable TLSv1.3
+     * middlebox compatibility by default. This may be disabled by default in
+     * a later OpenSSL version.
+     */
+    ret->options |= SSL_OP_NO_COMPRESSION | SSL_OP_ENABLE_MIDDLEBOX_COMPAT;
+
+    ret->ext.status_type = TLSEXT_STATUSTYPE_nothing;
+
+    /*
+     * We cannot usefully set a default max_early_data here (which gets
+     * propagated in SSL_new(), for the following reason: setting the
+     * SSL field causes tls_construct_stoc_early_data() to tell the
+     * client that early data will be accepted when constructing a TLS 1.3
+     * session ticket, and the client will accordingly send us early data
+     * when using that ticket (if the client has early data to send).
+     * However, in order for the early data to actually be consumed by
+     * the application, the application must also have calls to
+     * SSL_read_early_data(); otherwise we'll just skip past the early data
+     * and ignore it.  So, since the application must add calls to
+     * SSL_read_early_data(), we also require them to add
+     * calls to SSL_CTX_set_max_early_data() in order to use early data,
+     * eliminating the bandwidth-wasting early data in the case described
+     * above.
+     */
+    ret->max_early_data = 0;
 
     /*
-     * Disable SSLv2 by default, callers that want to enable SSLv2 will have to
-     * explicitly clear this option via either of SSL_CTX_clear_options() or
-     * SSL_clear_options().
+     * Default recv_max_early_data is a fully loaded single record. Could be
+     * split across multiple records in practice. We set this differently to
+     * max_early_data so that, in the default case, we do not advertise any
+     * support for early_data, but if a client were to send us some (e.g.
+     * because of an old, stale ticket) then we will tolerate it and skip over
+     * it.
      */
-    ret->options |= SSL_OP_NO_SSLv2;
+    ret->recv_max_early_data = SSL3_RT_MAX_PLAIN_LENGTH;
 
-    return (ret);
+    /* By default we send two session tickets automatically in TLSv1.3 */
+    ret->num_tickets = 2;
+
+    ssl_ctx_system_config(ret);
+
+    return ret;
  err:
     SSLerr(SSL_F_SSL_CTX_NEW, ERR_R_MALLOC_FAILURE);
  err2:
-    if (ret != NULL)
-        SSL_CTX_free(ret);
-    return (NULL);
+    SSL_CTX_free(ret);
+    return NULL;
 }
 
-#if 0
-static void SSL_COMP_free(SSL_COMP *comp)
+int SSL_CTX_up_ref(SSL_CTX *ctx)
 {
-    OPENSSL_free(comp);
-}
-#endif
+    int i;
 
-#ifndef OPENSSL_NO_BUF_FREELISTS
-static void ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
-{
-    SSL3_BUF_FREELIST_ENTRY *ent, *next;
-    for (ent = list->head; ent; ent = next) {
-        next = ent->next;
-        OPENSSL_free(ent);
-    }
-    OPENSSL_free(list);
+    if (CRYPTO_UP_REF(&ctx->references, &i, ctx->lock) <= 0)
+        return 0;
+
+    REF_PRINT_COUNT("SSL_CTX", ctx);
+    REF_ASSERT_ISNT(i < 2);
+    return ((i > 1) ? 1 : 0);
 }
-#endif
 
 void SSL_CTX_free(SSL_CTX *a)
 {
@@ -2111,21 +3076,14 @@ void SSL_CTX_free(SSL_CTX *a)
     if (a == NULL)
         return;
 
-    i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX);
-#ifdef REF_PRINT
-    REF_PRINT("SSL_CTX", a);
-#endif
+    CRYPTO_DOWN_REF(&a->references, &i, a->lock);
+    REF_PRINT_COUNT("SSL_CTX", a);
     if (i > 0)
         return;
-#ifdef REF_CHECK
-    if (i < 0) {
-        fprintf(stderr, "SSL_CTX_free, bad reference count\n");
-        abort();                /* ok */
-    }
-#endif
+    REF_ASSERT_ISNT(i < 0);
 
-    if (a->param)
-        X509_VERIFY_PARAM_free(a->param);
+    X509_VERIFY_PARAM_free(a->param);
+    dane_ctx_final(&a->dane);
 
     /*
      * Free internal session cache. However: the remove_cb() may reference
@@ -2140,63 +3098,36 @@ void SSL_CTX_free(SSL_CTX *a)
         SSL_CTX_flush_sessions(a, 0);
 
     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);
-
-    if (a->sessions != NULL)
-        lh_SSL_SESSION_free(a->sessions);
-
-    if (a->cert_store != NULL)
-        X509_STORE_free(a->cert_store);
-    if (a->cipher_list != NULL)
-        sk_SSL_CIPHER_free(a->cipher_list);
-    if (a->cipher_list_by_id != NULL)
-        sk_SSL_CIPHER_free(a->cipher_list_by_id);
-    if (a->cert != NULL)
-        ssl_cert_free(a->cert);
-    if (a->client_CA != NULL)
-        sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free);
-    if (a->extra_certs != NULL)
-        sk_X509_pop_free(a->extra_certs, X509_free);
-#if 0                           /* This should never be done, since it
-                                 * removes a global database */
-    if (a->comp_methods != NULL)
-        sk_SSL_COMP_pop_free(a->comp_methods, SSL_COMP_free);
-#else
-    a->comp_methods = NULL;
+    lh_SSL_SESSION_free(a->sessions);
+    X509_STORE_free(a->cert_store);
+#ifndef OPENSSL_NO_CT
+    CTLOG_STORE_free(a->ctlog_store);
 #endif
-
+    sk_SSL_CIPHER_free(a->cipher_list);
+    sk_SSL_CIPHER_free(a->cipher_list_by_id);
+    sk_SSL_CIPHER_free(a->tls13_ciphersuites);
+    ssl_cert_free(a->cert);
+    sk_X509_NAME_pop_free(a->ca_names, X509_NAME_free);
+    sk_X509_pop_free(a->extra_certs, X509_free);
+    a->comp_methods = NULL;
 #ifndef OPENSSL_NO_SRTP
-    if (a->srtp_profiles)
-        sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
-#endif
-
-#ifndef OPENSSL_NO_PSK
-    if (a->psk_identity_hint)
-        OPENSSL_free(a->psk_identity_hint);
+    sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
 #endif
 #ifndef OPENSSL_NO_SRP
     SSL_CTX_SRP_CTX_free(a);
 #endif
 #ifndef OPENSSL_NO_ENGINE
-    if (a->client_cert_engine)
-        ENGINE_finish(a->client_cert_engine);
+    ENGINE_finish(a->client_cert_engine);
 #endif
 
-#ifndef OPENSSL_NO_BUF_FREELISTS
-    if (a->wbuf_freelist)
-        ssl_buf_freelist_free(a->wbuf_freelist);
-    if (a->rbuf_freelist)
-        ssl_buf_freelist_free(a->rbuf_freelist);
-#endif
-#ifndef OPENSSL_NO_TLSEXT
-# ifndef OPENSSL_NO_EC
-    if (a->tlsext_ecpointformatlist)
-        OPENSSL_free(a->tlsext_ecpointformatlist);
-    if (a->tlsext_ellipticcurvelist)
-        OPENSSL_free(a->tlsext_ellipticcurvelist);
-# endif                         /* OPENSSL_NO_EC */
-    if (a->alpn_client_proto_list != NULL)
-        OPENSSL_free(a->alpn_client_proto_list);
+#ifndef OPENSSL_NO_EC
+    OPENSSL_free(a->ext.ecpointformats);
+    OPENSSL_free(a->ext.supportedgroups);
 #endif
+    OPENSSL_free(a->ext.alpn);
+    OPENSSL_secure_free(a->ext.secure);
+
+    CRYPTO_THREAD_lock_free(a->lock);
 
     OPENSSL_free(a);
 }
@@ -2211,6 +3142,36 @@ void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
     ctx->default_passwd_callback_userdata = u;
 }
 
+pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback;
+}
+
+void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
+{
+    return ctx->default_passwd_callback_userdata;
+}
+
+void SSL_set_default_passwd_cb(SSL *s, pem_password_cb *cb)
+{
+    s->default_passwd_callback = cb;
+}
+
+void SSL_set_default_passwd_cb_userdata(SSL *s, void *u)
+{
+    s->default_passwd_callback_userdata = u;
+}
+
+pem_password_cb *SSL_get_default_passwd_cb(SSL *s)
+{
+    return s->default_passwd_callback;
+}
+
+void *SSL_get_default_passwd_cb_userdata(SSL *s)
+{
+    return s->default_passwd_callback_userdata;
+}
+
 void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx,
                                       int (*cb) (X509_STORE_CTX *, void *),
                                       void *arg)
@@ -2231,8 +3192,7 @@ void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
     X509_VERIFY_PARAM_set_depth(ctx->param, depth);
 }
 
-void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg),
-                         void *arg)
+void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb) (SSL *ssl, void *arg), void *arg)
 {
     ssl_cert_set_cert_cb(c->cert, cb, arg);
 }
@@ -2242,140 +3202,74 @@ void SSL_set_cert_cb(SSL *s, int (*cb) (SSL *ssl, void *arg), void *arg)
     ssl_cert_set_cert_cb(s->cert, cb, arg);
 }
 
-void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
+void ssl_set_masks(SSL *s)
 {
-    CERT_PKEY *cpk;
-    int rsa_enc, rsa_tmp, rsa_sign, dh_tmp, dh_rsa, dh_dsa, dsa_sign;
-    int rsa_enc_export, dh_rsa_export, dh_dsa_export;
-    int rsa_tmp_export, dh_tmp_export, kl;
-    unsigned long mask_k, mask_a, emask_k, emask_a;
-#ifndef OPENSSL_NO_ECDSA
-    int have_ecc_cert, ecdsa_ok, ecc_pkey_size;
-#endif
-#ifndef OPENSSL_NO_ECDH
-    int have_ecdh_tmp, ecdh_ok;
-#endif
+    CERT *c = s->cert;
+    uint32_t *pvalid = s->s3->tmp.valid_flags;
+    int rsa_enc, rsa_sign, dh_tmp, dsa_sign;
+    unsigned long mask_k, mask_a;
 #ifndef OPENSSL_NO_EC
-    X509 *x = NULL;
-    EVP_PKEY *ecc_pkey = NULL;
-    int signature_nid = 0, pk_nid = 0, md_nid = 0;
+    int have_ecc_cert, ecdsa_ok;
 #endif
     if (c == NULL)
         return;
 
-    kl = SSL_C_EXPORT_PKEYLENGTH(cipher);
-
-#ifndef OPENSSL_NO_RSA
-    rsa_tmp = (c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
-    rsa_tmp_export = (c->rsa_tmp_cb != NULL ||
-                      (rsa_tmp && RSA_size(c->rsa_tmp) * 8 <= kl));
-#else
-    rsa_tmp = rsa_tmp_export = 0;
-#endif
 #ifndef OPENSSL_NO_DH
-    dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
-    dh_tmp_export = (c->dh_tmp_cb != NULL ||
-                     (dh_tmp && DH_size(c->dh_tmp) * 8 <= kl));
+    dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL || c->dh_tmp_auto);
 #else
-    dh_tmp = dh_tmp_export = 0;
+    dh_tmp = 0;
 #endif
 
-#ifndef OPENSSL_NO_ECDH
-    have_ecdh_tmp = (c->ecdh_tmp || c->ecdh_tmp_cb || c->ecdh_tmp_auto);
-#endif
-    cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]);
-    rsa_enc = cpk->valid_flags & CERT_PKEY_VALID;
-    rsa_enc_export = (rsa_enc && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
-    cpk = &(c->pkeys[SSL_PKEY_RSA_SIGN]);
-    rsa_sign = cpk->valid_flags & CERT_PKEY_SIGN;
-    cpk = &(c->pkeys[SSL_PKEY_DSA_SIGN]);
-    dsa_sign = cpk->valid_flags & CERT_PKEY_SIGN;
-    cpk = &(c->pkeys[SSL_PKEY_DH_RSA]);
-    dh_rsa = cpk->valid_flags & CERT_PKEY_VALID;
-    dh_rsa_export = (dh_rsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
-    cpk = &(c->pkeys[SSL_PKEY_DH_DSA]);
-/* FIX THIS EAY EAY EAY */
-    dh_dsa = cpk->valid_flags & CERT_PKEY_VALID;
-    dh_dsa_export = (dh_dsa && EVP_PKEY_size(cpk->privatekey) * 8 <= kl);
-    cpk = &(c->pkeys[SSL_PKEY_ECC]);
+    rsa_enc = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
+    rsa_sign = pvalid[SSL_PKEY_RSA] & CERT_PKEY_VALID;
+    dsa_sign = pvalid[SSL_PKEY_DSA_SIGN] & CERT_PKEY_VALID;
 #ifndef OPENSSL_NO_EC
-    have_ecc_cert = cpk->valid_flags & CERT_PKEY_VALID;
+    have_ecc_cert = pvalid[SSL_PKEY_ECC] & CERT_PKEY_VALID;
 #endif
     mask_k = 0;
     mask_a = 0;
-    emask_k = 0;
-    emask_a = 0;
 
 #ifdef CIPHER_DEBUG
-    fprintf(stderr,
-            "rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
-            rsa_tmp, rsa_tmp_export, dh_tmp, have_ecdh_tmp, rsa_enc,
-            rsa_enc_export, rsa_sign, dsa_sign, dh_rsa, dh_dsa);
+    fprintf(stderr, "dht=%d re=%d rs=%d ds=%d\n",
+            dh_tmp, rsa_enc, rsa_sign, dsa_sign);
 #endif
 
-    cpk = &(c->pkeys[SSL_PKEY_GOST01]);
-    if (cpk->x509 != NULL && cpk->privatekey != NULL) {
+#ifndef OPENSSL_NO_GOST
+    if (ssl_has_cert(s, SSL_PKEY_GOST12_512)) {
         mask_k |= SSL_kGOST;
-        mask_a |= SSL_aGOST01;
+        mask_a |= SSL_aGOST12;
     }
-    cpk = &(c->pkeys[SSL_PKEY_GOST94]);
-    if (cpk->x509 != NULL && cpk->privatekey != NULL) {
+    if (ssl_has_cert(s, SSL_PKEY_GOST12_256)) {
         mask_k |= SSL_kGOST;
-        mask_a |= SSL_aGOST94;
+        mask_a |= SSL_aGOST12;
+    }
+    if (ssl_has_cert(s, SSL_PKEY_GOST01)) {
+        mask_k |= SSL_kGOST;
+        mask_a |= SSL_aGOST01;
     }
-
-    if (rsa_enc || (rsa_tmp && rsa_sign))
-        mask_k |= SSL_kRSA;
-    if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
-        emask_k |= SSL_kRSA;
-
-#if 0
-    /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
-    if ((dh_tmp || dh_rsa || dh_dsa) && (rsa_enc || rsa_sign || dsa_sign))
-        mask_k |= SSL_kEDH;
-    if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
-        (rsa_enc || rsa_sign || dsa_sign))
-        emask_k |= SSL_kEDH;
 #endif
 
-    if (dh_tmp_export)
-        emask_k |= SSL_kEDH;
+    if (rsa_enc)
+        mask_k |= SSL_kRSA;
 
     if (dh_tmp)
-        mask_k |= SSL_kEDH;
+        mask_k |= SSL_kDHE;
 
-    if (dh_rsa)
-        mask_k |= SSL_kDHr;
-    if (dh_rsa_export)
-        emask_k |= SSL_kDHr;
-
-    if (dh_dsa)
-        mask_k |= SSL_kDHd;
-    if (dh_dsa_export)
-        emask_k |= SSL_kDHd;
-
-    if (mask_k & (SSL_kDHr | SSL_kDHd))
-        mask_a |= SSL_aDH;
+    /*
+     * If we only have an RSA-PSS certificate allow RSA authentication
+     * if TLS 1.2 and peer supports it.
+     */
 
-    if (rsa_enc || rsa_sign) {
+    if (rsa_enc || rsa_sign || (ssl_has_cert(s, SSL_PKEY_RSA_PSS_SIGN)
+                && pvalid[SSL_PKEY_RSA_PSS_SIGN] & CERT_PKEY_EXPLICIT_SIGN
+                && TLS1_get_version(s) == TLS1_2_VERSION))
         mask_a |= SSL_aRSA;
-        emask_a |= SSL_aRSA;
-    }
 
     if (dsa_sign) {
         mask_a |= SSL_aDSS;
-        emask_a |= SSL_aDSS;
     }
 
     mask_a |= SSL_aNULL;
-    emask_a |= SSL_aNULL;
-
-#ifndef OPENSSL_NO_KRB5
-    mask_k |= SSL_kKRB5;
-    mask_a |= SSL_aKRB5;
-    emask_k |= SSL_kKRB5;
-    emask_a |= SSL_aKRB5;
-#endif
 
     /*
      * An ECC certificate may be usable for ECDH and/or ECDSA cipher suites
@@ -2383,251 +3277,76 @@ void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
      */
 #ifndef OPENSSL_NO_EC
     if (have_ecc_cert) {
-        cpk = &c->pkeys[SSL_PKEY_ECC];
-        x = cpk->x509;
-        /* This call populates extension flags (ex_flags) */
-        X509_check_purpose(x, -1, 0);
-# ifndef OPENSSL_NO_ECDH
-        ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
-            (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
-# endif
-        ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
-            (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
-        if (!(cpk->valid_flags & CERT_PKEY_SIGN))
+        uint32_t ex_kusage;
+        ex_kusage = X509_get_key_usage(c->pkeys[SSL_PKEY_ECC].x509);
+        ecdsa_ok = ex_kusage & X509v3_KU_DIGITAL_SIGNATURE;
+        if (!(pvalid[SSL_PKEY_ECC] & CERT_PKEY_SIGN))
             ecdsa_ok = 0;
-        ecc_pkey = X509_get_pubkey(x);
-        ecc_pkey_size = (ecc_pkey != NULL) ? EVP_PKEY_bits(ecc_pkey) : 0;
-        EVP_PKEY_free(ecc_pkey);
-        if ((x->sig_alg) && (x->sig_alg->algorithm)) {
-            signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
-            OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
-        }
-# ifndef OPENSSL_NO_ECDH
-        if (ecdh_ok) {
-
-            if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) {
-                mask_k |= SSL_kECDHr;
-                mask_a |= SSL_aECDH;
-                if (ecc_pkey_size <= 163) {
-                    emask_k |= SSL_kECDHr;
-                    emask_a |= SSL_aECDH;
-                }
-            }
-
-            if (pk_nid == NID_X9_62_id_ecPublicKey) {
-                mask_k |= SSL_kECDHe;
-                mask_a |= SSL_aECDH;
-                if (ecc_pkey_size <= 163) {
-                    emask_k |= SSL_kECDHe;
-                    emask_a |= SSL_aECDH;
-                }
-            }
-        }
-# endif
-# ifndef OPENSSL_NO_ECDSA
-        if (ecdsa_ok) {
+        if (ecdsa_ok)
             mask_a |= SSL_aECDSA;
-            emask_a |= SSL_aECDSA;
-        }
-# endif
     }
+    /* Allow Ed25519 for TLS 1.2 if peer supports it */
+    if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED25519)
+            && pvalid[SSL_PKEY_ED25519] & CERT_PKEY_EXPLICIT_SIGN
+            && TLS1_get_version(s) == TLS1_2_VERSION)
+            mask_a |= SSL_aECDSA;
+
+    /* Allow Ed448 for TLS 1.2 if peer supports it */
+    if (!(mask_a & SSL_aECDSA) && ssl_has_cert(s, SSL_PKEY_ED448)
+            && pvalid[SSL_PKEY_ED448] & CERT_PKEY_EXPLICIT_SIGN
+            && TLS1_get_version(s) == TLS1_2_VERSION)
+            mask_a |= SSL_aECDSA;
 #endif
 
-#ifndef OPENSSL_NO_ECDH
-    if (have_ecdh_tmp) {
-        mask_k |= SSL_kEECDH;
-        emask_k |= SSL_kEECDH;
-    }
+#ifndef OPENSSL_NO_EC
+    mask_k |= SSL_kECDHE;
 #endif
 
 #ifndef OPENSSL_NO_PSK
     mask_k |= SSL_kPSK;
     mask_a |= SSL_aPSK;
-    emask_k |= SSL_kPSK;
-    emask_a |= SSL_aPSK;
+    if (mask_k & SSL_kRSA)
+        mask_k |= SSL_kRSAPSK;
+    if (mask_k & SSL_kDHE)
+        mask_k |= SSL_kDHEPSK;
+    if (mask_k & SSL_kECDHE)
+        mask_k |= SSL_kECDHEPSK;
 #endif
 
-    c->mask_k = mask_k;
-    c->mask_a = mask_a;
-    c->export_mask_k = emask_k;
-    c->export_mask_a = emask_a;
-    c->valid = 1;
+    s->s3->tmp.mask_k = mask_k;
+    s->s3->tmp.mask_a = mask_a;
 }
 
-/* This handy macro borrowed from crypto/x509v3/v3_purp.c */
-#define ku_reject(x, usage) \
-        (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))
-
 #ifndef OPENSSL_NO_EC
 
 int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
 {
-    unsigned long alg_k, alg_a;
-    EVP_PKEY *pkey = NULL;
-    int keysize = 0;
-    int signature_nid = 0, md_nid = 0, pk_nid = 0;
-    const SSL_CIPHER *cs = s->s3->tmp.new_cipher;
-
-    alg_k = cs->algorithm_mkey;
-    alg_a = cs->algorithm_auth;
-
-    if (SSL_C_IS_EXPORT(cs)) {
-        /* ECDH key length in export ciphers must be <= 163 bits */
-        pkey = X509_get_pubkey(x);
-        if (pkey == NULL)
-            return 0;
-        keysize = EVP_PKEY_bits(pkey);
-        EVP_PKEY_free(pkey);
-        if (keysize > 163)
-            return 0;
-    }
-
-    /* This call populates the ex_flags field correctly */
-    X509_check_purpose(x, -1, 0);
-    if ((x->sig_alg) && (x->sig_alg->algorithm)) {
-        signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
-        OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
-    }
-    if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr) {
-        /* key usage, if present, must allow key agreement */
-        if (ku_reject(x, X509v3_KU_KEY_AGREEMENT)) {
-            SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
-                   SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
-            return 0;
-        }
-        if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION) {
-            /* signature alg must be ECDSA */
-            if (pk_nid != NID_X9_62_id_ecPublicKey) {
-                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
-                       SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
-                return 0;
-            }
-        }
-        if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION) {
-            /* signature alg must be RSA */
-
-            if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa) {
-                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
-                       SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
-                return 0;
-            }
-        }
-    }
-    if (alg_a & SSL_aECDSA) {
+    if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA) {
         /* key usage, if present, must allow signing */
-        if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) {
+        if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
             SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG,
                    SSL_R_ECC_CERT_NOT_FOR_SIGNING);
             return 0;
         }
     }
-
     return 1;                   /* all checks are ok */
 }
 
 #endif
 
-static int ssl_get_server_cert_index(const SSL *s)
-{
-    int idx;
-    idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
-    if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509)
-        idx = SSL_PKEY_RSA_SIGN;
-    if (idx == -1)
-        SSLerr(SSL_F_SSL_GET_SERVER_CERT_INDEX, ERR_R_INTERNAL_ERROR);
-    return idx;
-}
-
-CERT_PKEY *ssl_get_server_send_pkey(const SSL *s)
-{
-    CERT *c;
-    int i;
-
-    c = s->cert;
-    if (!s->s3 || !s->s3->tmp.new_cipher)
-        return NULL;
-    ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
-
-#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-    /*
-     * Broken protocol test: return last used certificate: which may mismatch
-     * the one expected.
-     */
-    if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
-        return c->key;
-#endif
-
-    i = ssl_get_server_cert_index(s);
-
-    /* This may or may not be an error. */
-    if (i < 0)
-        return NULL;
-
-    /* May be NULL. */
-    return &c->pkeys[i];
-}
-
-EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher,
-                            const EVP_MD **pmd)
-{
-    unsigned long alg_a;
-    CERT *c;
-    int idx = -1;
-
-    alg_a = cipher->algorithm_auth;
-    c = s->cert;
-
-#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
-    /*
-     * Broken protocol test: use last key: which may mismatch the one
-     * expected.
-     */
-    if (c->cert_flags & SSL_CERT_FLAG_BROKEN_PROTOCOL)
-        idx = c->key - c->pkeys;
-    else
-#endif
-
-    if ((alg_a & SSL_aDSS) &&
-            (c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
-        idx = SSL_PKEY_DSA_SIGN;
-    else if (alg_a & SSL_aRSA) {
-        if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
-            idx = SSL_PKEY_RSA_SIGN;
-        else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
-            idx = SSL_PKEY_RSA_ENC;
-    } else if ((alg_a & SSL_aECDSA) &&
-               (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
-        idx = SSL_PKEY_ECC;
-    if (idx == -1) {
-        SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR);
-        return (NULL);
-    }
-    if (pmd)
-        *pmd = c->pkeys[idx].digest;
-    return c->pkeys[idx].privatekey;
-}
-
-#ifndef OPENSSL_NO_TLSEXT
 int ssl_get_server_cert_serverinfo(SSL *s, const unsigned char **serverinfo,
                                    size_t *serverinfo_length)
 {
-    CERT *c = NULL;
-    int i = 0;
+    CERT_PKEY *cpk = s->s3->tmp.cert;
     *serverinfo_length = 0;
 
-    c = s->cert;
-    i = ssl_get_server_cert_index(s);
-
-    if (i == -1)
-        return 0;
-    if (c->pkeys[i].serverinfo == NULL)
+    if (cpk == NULL || cpk->serverinfo == NULL)
         return 0;
 
-    *serverinfo = c->pkeys[i].serverinfo;
-    *serverinfo_length = c->pkeys[i].serverinfo_length;
+    *serverinfo = cpk->serverinfo;
+    *serverinfo_length = cpk->serverinfo_length;
     return 1;
 }
-#endif
 
 void ssl_update_cache(SSL *s, int mode)
 {
@@ -2640,23 +3359,63 @@ void ssl_update_cache(SSL *s, int mode)
     if (s->session->session_id_length == 0)
         return;
 
+    /*
+     * If sid_ctx_length is 0 there is no specific application context
+     * associated with this session, so when we try to resume it and
+     * SSL_VERIFY_PEER is requested to verify the client identity, we have no
+     * indication that this is actually a session for the proper application
+     * context, and the *handshake* will fail, not just the resumption attempt.
+     * Do not cache (on the server) these sessions that are not resumable
+     * (clients can set SSL_VERIFY_PEER without needing a sid_ctx set).
+     */
+    if (s->server && s->session->sid_ctx_length == 0
+            && (s->verify_mode & SSL_VERIFY_PEER) != 0)
+        return;
+
     i = s->session_ctx->session_cache_mode;
-    if ((i & mode) && (!s->hit)
-        && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
-            || SSL_CTX_add_session(s->session_ctx, s->session))
-        && (s->session_ctx->new_session_cb != NULL)) {
-        CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION);
-        if (!s->session_ctx->new_session_cb(s, s->session))
-            SSL_SESSION_free(s->session);
+    if ((i & mode) != 0
+        && (!s->hit || SSL_IS_TLS13(s))) {
+        /*
+         * Add the session to the internal cache. In server side TLSv1.3 we
+         * normally don't do this because by default it's a full stateless ticket
+         * with only a dummy session id so there is no reason to cache it,
+         * unless:
+         * - we are doing early_data, in which case we cache so that we can
+         *   detect replays
+         * - the application has set a remove_session_cb so needs to know about
+         *   session timeout events
+         * - SSL_OP_NO_TICKET is set in which case it is a stateful ticket
+         */
+        if ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE) == 0
+                && (!SSL_IS_TLS13(s)
+                    || !s->server
+                    || (s->max_early_data > 0
+                        && (s->options & SSL_OP_NO_ANTI_REPLAY) == 0)
+                    || s->session_ctx->remove_session_cb != NULL
+                    || (s->options & SSL_OP_NO_TICKET) != 0))
+            SSL_CTX_add_session(s->session_ctx, s->session);
+
+        /*
+         * Add the session to the external cache. We do this even in server side
+         * TLSv1.3 without early data because some applications just want to
+         * know about the creation of a session and aren't doing a full cache.
+         */
+        if (s->session_ctx->new_session_cb != NULL) {
+            SSL_SESSION_up_ref(s->session);
+            if (!s->session_ctx->new_session_cb(s, s->session))
+                SSL_SESSION_free(s->session);
+        }
     }
 
     /* auto flush every 255 connections */
     if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) && ((i & mode) == mode)) {
-        if ((((mode & SSL_SESS_CACHE_CLIENT)
-              ? s->session_ctx->stats.sess_connect_good
-              : s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff) {
+        TSAN_QUALIFIER int *stat;
+        if (mode & SSL_SESS_CACHE_CLIENT)
+            stat = &s->session_ctx->stats.sess_connect_good;
+        else
+            stat = &s->session_ctx->stats.sess_accept_good;
+        if ((tsan_load(stat) & 0xff) == 0xff)
             SSL_CTX_flush_sessions(s->session_ctx, (unsigned long)time(NULL));
-        }
     }
 }
 
@@ -2667,32 +3426,31 @@ const SSL_METHOD *SSL_CTX_get_ssl_method(SSL_CTX *ctx)
 
 const SSL_METHOD *SSL_get_ssl_method(SSL *s)
 {
-    return (s->method);
+    return s->method;
 }
 
 int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
 {
-    int conn = -1;
     int ret = 1;
 
     if (s->method != meth) {
-        if (s->handshake_func != NULL)
-            conn = (s->handshake_func == s->method->ssl_connect);
+        const SSL_METHOD *sm = s->method;
+        int (*hf) (SSL *) = s->handshake_func;
 
-        if (s->method->version == meth->version)
+        if (sm->version == meth->version)
             s->method = meth;
         else {
-            s->method->ssl_free(s);
+            sm->ssl_free(s);
             s->method = meth;
             ret = s->method->ssl_new(s);
         }
 
-        if (conn == 1)
+        if (hf == sm->ssl_connect)
             s->handshake_func = meth->ssl_connect;
-        else if (conn == 0)
+        else if (hf == sm->ssl_accept)
             s->handshake_func = meth->ssl_accept;
     }
-    return (ret);
+    return ret;
 }
 
 int SSL_get_error(const SSL *s, int i)
@@ -2702,7 +3460,7 @@ int SSL_get_error(const SSL *s, int i)
     BIO *bio;
 
     if (i > 0)
-        return (SSL_ERROR_NONE);
+        return SSL_ERROR_NONE;
 
     /*
      * Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc,
@@ -2710,15 +3468,15 @@ int SSL_get_error(const SSL *s, int i)
      */
     if ((l = ERR_peek_error()) != 0) {
         if (ERR_GET_LIB(l) == ERR_LIB_SYS)
-            return (SSL_ERROR_SYSCALL);
+            return SSL_ERROR_SYSCALL;
         else
-            return (SSL_ERROR_SSL);
+            return SSL_ERROR_SSL;
     }
 
-    if ((i < 0) && SSL_want_read(s)) {
+    if (SSL_want_read(s)) {
         bio = SSL_get_rbio(s);
         if (BIO_should_read(bio))
-            return (SSL_ERROR_WANT_READ);
+            return SSL_ERROR_WANT_READ;
         else if (BIO_should_write(bio))
             /*
              * This one doesn't make too much sense ... We never try to write
@@ -2729,52 +3487,63 @@ int SSL_get_error(const SSL *s, int i)
              * wbio *are* the same, this test works around that bug; so it
              * might be safer to keep it.
              */
-            return (SSL_ERROR_WANT_WRITE);
+            return SSL_ERROR_WANT_WRITE;
         else if (BIO_should_io_special(bio)) {
             reason = BIO_get_retry_reason(bio);
             if (reason == BIO_RR_CONNECT)
-                return (SSL_ERROR_WANT_CONNECT);
+                return SSL_ERROR_WANT_CONNECT;
             else if (reason == BIO_RR_ACCEPT)
-                return (SSL_ERROR_WANT_ACCEPT);
+                return SSL_ERROR_WANT_ACCEPT;
             else
-                return (SSL_ERROR_SYSCALL); /* unknown */
+                return SSL_ERROR_SYSCALL; /* unknown */
         }
     }
 
-    if ((i < 0) && SSL_want_write(s)) {
-        bio = SSL_get_wbio(s);
+    if (SSL_want_write(s)) {
+        /* Access wbio directly - in order to use the buffered bio if present */
+        bio = s->wbio;
         if (BIO_should_write(bio))
-            return (SSL_ERROR_WANT_WRITE);
+            return SSL_ERROR_WANT_WRITE;
         else if (BIO_should_read(bio))
             /*
              * See above (SSL_want_read(s) with BIO_should_write(bio))
              */
-            return (SSL_ERROR_WANT_READ);
+            return SSL_ERROR_WANT_READ;
         else if (BIO_should_io_special(bio)) {
             reason = BIO_get_retry_reason(bio);
             if (reason == BIO_RR_CONNECT)
-                return (SSL_ERROR_WANT_CONNECT);
+                return SSL_ERROR_WANT_CONNECT;
             else if (reason == BIO_RR_ACCEPT)
-                return (SSL_ERROR_WANT_ACCEPT);
+                return SSL_ERROR_WANT_ACCEPT;
             else
-                return (SSL_ERROR_SYSCALL);
+                return SSL_ERROR_SYSCALL;
         }
     }
-    if ((i < 0) && SSL_want_x509_lookup(s)) {
-        return (SSL_ERROR_WANT_X509_LOOKUP);
-    }
+    if (SSL_want_x509_lookup(s))
+        return SSL_ERROR_WANT_X509_LOOKUP;
+    if (SSL_want_async(s))
+        return SSL_ERROR_WANT_ASYNC;
+    if (SSL_want_async_job(s))
+        return SSL_ERROR_WANT_ASYNC_JOB;
+    if (SSL_want_client_hello_cb(s))
+        return SSL_ERROR_WANT_CLIENT_HELLO_CB;
 
-    if (i == 0) {
-        if (s->version == SSL2_VERSION) {
-            /* assume it is the socket being closed */
-            return (SSL_ERROR_ZERO_RETURN);
-        } else {
-            if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
-                (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
-                return (SSL_ERROR_ZERO_RETURN);
-        }
-    }
-    return (SSL_ERROR_SYSCALL);
+    if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
+        (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
+        return SSL_ERROR_ZERO_RETURN;
+
+    return SSL_ERROR_SYSCALL;
+}
+
+static int ssl_do_handshake_intern(void *vargs)
+{
+    struct ssl_async_args *args;
+    SSL *s;
+
+    args = (struct ssl_async_args *)vargs;
+    s = args->s;
+
+    return s->handshake_func(s);
 }
 
 int SSL_do_handshake(SSL *s)
@@ -2783,91 +3552,105 @@ int SSL_do_handshake(SSL *s)
 
     if (s->handshake_func == NULL) {
         SSLerr(SSL_F_SSL_DO_HANDSHAKE, SSL_R_CONNECTION_TYPE_NOT_SET);
-        return (-1);
+        return -1;
     }
 
-    s->method->ssl_renegotiate_check(s);
+    ossl_statem_check_finish_init(s, -1);
+
+    s->method->ssl_renegotiate_check(s, 0);
 
     if (SSL_in_init(s) || SSL_in_before(s)) {
-        ret = s->handshake_func(s);
+        if ((s->mode & SSL_MODE_ASYNC) && ASYNC_get_current_job() == NULL) {
+            struct ssl_async_args args;
+
+            args.s = s;
+
+            ret = ssl_start_async_job(s, &args, ssl_do_handshake_intern);
+        } else {
+            ret = s->handshake_func(s);
+        }
     }
-    return (ret);
+    return ret;
 }
 
-/*
- * For the next 2 functions, SSL_clear() sets shutdown and so one of these
- * calls will reset it
- */
 void SSL_set_accept_state(SSL *s)
 {
     s->server = 1;
     s->shutdown = 0;
-    s->state = SSL_ST_ACCEPT | SSL_ST_BEFORE;
+    ossl_statem_clear(s);
     s->handshake_func = s->method->ssl_accept;
-    /* clear the current cipher */
-    ssl_clear_cipher_ctx(s);
-    ssl_clear_hash_ctx(&s->read_hash);
-    ssl_clear_hash_ctx(&s->write_hash);
+    clear_ciphers(s);
 }
 
 void SSL_set_connect_state(SSL *s)
 {
     s->server = 0;
     s->shutdown = 0;
-    s->state = SSL_ST_CONNECT | SSL_ST_BEFORE;
+    ossl_statem_clear(s);
     s->handshake_func = s->method->ssl_connect;
-    /* clear the current cipher */
-    ssl_clear_cipher_ctx(s);
-    ssl_clear_hash_ctx(&s->read_hash);
-    ssl_clear_hash_ctx(&s->write_hash);
+    clear_ciphers(s);
 }
 
 int ssl_undefined_function(SSL *s)
 {
     SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
-    return (0);
+    return 0;
 }
 
 int ssl_undefined_void_function(void)
 {
     SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,
            ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
-    return (0);
+    return 0;
 }
 
 int ssl_undefined_const_function(const SSL *s)
 {
-    SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,
-           ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
-    return (0);
+    return 0;
 }
 
-SSL_METHOD *ssl_bad_method(int ver)
+const SSL_METHOD *ssl_bad_method(int ver)
 {
     SSLerr(SSL_F_SSL_BAD_METHOD, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
-    return (NULL);
+    return NULL;
+}
+
+const char *ssl_protocol_to_string(int version)
+{
+    switch(version)
+    {
+    case TLS1_3_VERSION:
+        return "TLSv1.3";
+
+    case TLS1_2_VERSION:
+        return "TLSv1.2";
+
+    case TLS1_1_VERSION:
+        return "TLSv1.1";
+
+    case TLS1_VERSION:
+        return "TLSv1";
+
+    case SSL3_VERSION:
+        return "SSLv3";
+
+    case DTLS1_BAD_VER:
+        return "DTLSv0.9";
+
+    case DTLS1_VERSION:
+        return "DTLSv1";
+
+    case DTLS1_2_VERSION:
+        return "DTLSv1.2";
+
+    default:
+        return "unknown";
+    }
 }
 
 const char *SSL_get_version(const SSL *s)
 {
-    if (s->version == TLS1_2_VERSION)
-        return ("TLSv1.2");
-    else if (s->version == TLS1_1_VERSION)
-        return ("TLSv1.1");
-    else if (s->version == TLS1_VERSION)
-        return ("TLSv1");
-    else if (s->version == SSL3_VERSION)
-        return ("SSLv3");
-    else if (s->version == SSL2_VERSION)
-        return ("SSLv2");
-    else if (s->version == DTLS1_BAD_VER)
-        return ("DTLSv0.9");
-    else if (s->version == DTLS1_VERSION)
-        return ("DTLSv1");
-    else if (s->version == DTLS1_2_VERSION)
-        return ("DTLSv1.2");
-    else
-        return ("unknown");
+    return ssl_protocol_to_string(s->version);
 }
 
 SSL *SSL_dup(SSL *s)
@@ -2877,16 +3660,25 @@ SSL *SSL_dup(SSL *s)
     SSL *ret;
     int i;
 
-    if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
-        return (NULL);
+    /* If we're not quiescent, just up_ref! */
+    if (!SSL_in_init(s) || !SSL_in_before(s)) {
+        CRYPTO_UP_REF(&s->references, &i, s->lock);
+        return s;
+    }
 
-    ret->version = s->version;
-    ret->type = s->type;
-    ret->method = s->method;
+    /*
+     * Otherwise, copy configuration state, and session if set.
+     */
+    if ((ret = SSL_new(SSL_get_SSL_CTX(s))) == NULL)
+        return NULL;
 
     if (s->session != NULL) {
-        /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
-        SSL_copy_session_id(ret, s);
+        /*
+         * Arranges to share the same session via up_ref.  This "copies"
+         * session-id, SSL_METHOD, sid_ctx, and 'cert'
+         */
+        if (!SSL_copy_session_id(ret, s))
+            goto err;
     } else {
         /*
          * No session has been established yet, so we have to expect that
@@ -2894,23 +3686,24 @@ SSL *SSL_dup(SSL *s)
          * point to the same object, and thus we can't use
          * SSL_copy_session_id.
          */
-
-        ret->method->ssl_free(ret);
-        ret->method = s->method;
-        ret->method->ssl_new(ret);
+        if (!SSL_set_ssl_method(ret, s->method))
+            goto err;
 
         if (s->cert != NULL) {
-            if (ret->cert != NULL) {
-                ssl_cert_free(ret->cert);
-            }
+            ssl_cert_free(ret->cert);
             ret->cert = ssl_cert_dup(s->cert);
             if (ret->cert == NULL)
                 goto err;
         }
 
-        SSL_set_session_id_context(ret, s->sid_ctx, s->sid_ctx_length);
+        if (!SSL_set_session_id_context(ret, s->sid_ctx,
+                                        (int)s->sid_ctx_length))
+            goto err;
     }
 
+    if (!ssl_dane_dup(ret, s))
+        goto err;
+    ret->version = s->version;
     ret->options = s->options;
     ret->mode = s->mode;
     SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
@@ -2923,8 +3716,6 @@ SSL *SSL_dup(SSL *s)
 
     SSL_set_info_callback(ret, SSL_get_info_callback(s));
 
-    ret->debug = s->debug;
-
     /* copy app data, a little dangerous perhaps */
     if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
         goto err;
@@ -2938,25 +3729,25 @@ SSL *SSL_dup(SSL *s)
         if (s->wbio != s->rbio) {
             if (!BIO_dup_state(s->wbio, (char *)&ret->wbio))
                 goto err;
-        } else
+        } else {
+            BIO_up_ref(ret->rbio);
             ret->wbio = ret->rbio;
+        }
     }
-    ret->rwstate = s->rwstate;
-    ret->in_handshake = s->in_handshake;
-    ret->handshake_func = s->handshake_func;
+
     ret->server = s->server;
-    ret->renegotiate = s->renegotiate;
-    ret->new_session = s->new_session;
-    ret->quiet_shutdown = s->quiet_shutdown;
+    if (s->handshake_func) {
+        if (s->server)
+            SSL_set_accept_state(ret);
+        else
+            SSL_set_connect_state(ret);
+    }
     ret->shutdown = s->shutdown;
-    ret->state = s->state;      /* SSL_dup does not really work at any state,
-                                 * though */
-    ret->rstate = s->rstate;
-    ret->init_num = 0;          /* would have to copy ret->init_buf,
-                                 * ret->init_msg, ret->init_num,
-                                 * ret->init_off */
     ret->hit = s->hit;
 
+    ret->default_passwd_callback = s->default_passwd_callback;
+    ret->default_passwd_callback_userdata = s->default_passwd_callback_userdata;
+
     X509_VERIFY_PARAM_inherit(ret->param, s->param);
 
     /* dup the cipher_list and cipher_list_by_id stacks */
@@ -2970,10 +3761,10 @@ SSL *SSL_dup(SSL *s)
             goto err;
 
     /* Dup the client_CA list */
-    if (s->client_CA != NULL) {
-        if ((sk = sk_X509_NAME_dup(s->client_CA)) == NULL)
+    if (s->ca_names != NULL) {
+        if ((sk = sk_X509_NAME_dup(s->ca_names)) == NULL)
             goto err;
-        ret->client_CA = sk;
+        ret->ca_names = sk;
         for (i = 0; i < sk_X509_NAME_num(sk); i++) {
             xn = sk_X509_NAME_value(sk, i);
             if (sk_X509_NAME_set(sk, i, X509_NAME_dup(xn)) == NULL) {
@@ -2982,54 +3773,45 @@ SSL *SSL_dup(SSL *s)
             }
         }
     }
+    return ret;
 
-    if (0) {
  err:
-        if (ret != NULL)
-            SSL_free(ret);
-        ret = NULL;
-    }
-    return (ret);
+    SSL_free(ret);
+    return NULL;
 }
 
 void ssl_clear_cipher_ctx(SSL *s)
 {
     if (s->enc_read_ctx != NULL) {
-        EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
-        OPENSSL_free(s->enc_read_ctx);
+        EVP_CIPHER_CTX_free(s->enc_read_ctx);
         s->enc_read_ctx = NULL;
     }
     if (s->enc_write_ctx != NULL) {
-        EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
-        OPENSSL_free(s->enc_write_ctx);
+        EVP_CIPHER_CTX_free(s->enc_write_ctx);
         s->enc_write_ctx = NULL;
     }
 #ifndef OPENSSL_NO_COMP
-    if (s->expand != NULL) {
-        COMP_CTX_free(s->expand);
-        s->expand = NULL;
-    }
-    if (s->compress != NULL) {
-        COMP_CTX_free(s->compress);
-        s->compress = NULL;
-    }
+    COMP_CTX_free(s->expand);
+    s->expand = NULL;
+    COMP_CTX_free(s->compress);
+    s->compress = NULL;
 #endif
 }
 
 X509 *SSL_get_certificate(const SSL *s)
 {
     if (s->cert != NULL)
-        return (s->cert->key->x509);
+        return s->cert->key->x509;
     else
-        return (NULL);
+        return NULL;
 }
 
 EVP_PKEY *SSL_get_privatekey(const SSL *s)
 {
     if (s->cert != NULL)
-        return (s->cert->key->privatekey);
+        return s->cert->key->privatekey;
     else
-        return (NULL);
+        return NULL;
 }
 
 X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx)
@@ -3051,82 +3833,65 @@ EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
 const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
 {
     if ((s->session != NULL) && (s->session->cipher != NULL))
-        return (s->session->cipher);
-    return (NULL);
-}
-
-#ifdef OPENSSL_NO_COMP
-const COMP_METHOD *SSL_get_current_compression(SSL *s)
-{
+        return s->session->cipher;
     return NULL;
 }
 
-const COMP_METHOD *SSL_get_current_expansion(SSL *s)
+const SSL_CIPHER *SSL_get_pending_cipher(const SSL *s)
 {
-    return NULL;
+    return s->s3->tmp.new_cipher;
 }
-#else
 
 const COMP_METHOD *SSL_get_current_compression(SSL *s)
 {
-    if (s->compress != NULL)
-        return (s->compress->meth);
-    return (NULL);
+#ifndef OPENSSL_NO_COMP
+    return s->compress ? COMP_CTX_get_method(s->compress) : NULL;
+#else
+    return NULL;
+#endif
 }
 
 const COMP_METHOD *SSL_get_current_expansion(SSL *s)
 {
-    if (s->expand != NULL)
-        return (s->expand->meth);
-    return (NULL);
-}
+#ifndef OPENSSL_NO_COMP
+    return s->expand ? COMP_CTX_get_method(s->expand) : NULL;
+#else
+    return NULL;
 #endif
+}
 
-int ssl_init_wbio_buffer(SSL *s, int push)
+int ssl_init_wbio_buffer(SSL *s)
 {
     BIO *bbio;
 
-    if (s->bbio == NULL) {
-        bbio = BIO_new(BIO_f_buffer());
-        if (bbio == NULL)
-            return (0);
-        s->bbio = bbio;
-    } else {
-        bbio = s->bbio;
-        if (s->bbio == s->wbio)
-            s->wbio = BIO_pop(s->wbio);
+    if (s->bbio != NULL) {
+        /* Already buffered. */
+        return 1;
     }
-    (void)BIO_reset(bbio);
-/*      if (!BIO_set_write_buffer_size(bbio,16*1024)) */
-    if (!BIO_set_read_buffer_size(bbio, 1)) {
+
+    bbio = BIO_new(BIO_f_buffer());
+    if (bbio == NULL || !BIO_set_read_buffer_size(bbio, 1)) {
+        BIO_free(bbio);
         SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER, ERR_R_BUF_LIB);
-        return (0);
-    }
-    if (push) {
-        if (s->wbio != bbio)
-            s->wbio = BIO_push(bbio, s->wbio);
-    } else {
-        if (s->wbio == bbio)
-            s->wbio = BIO_pop(bbio);
+        return 0;
     }
-    return (1);
+    s->bbio = bbio;
+    s->wbio = BIO_push(bbio, s->wbio);
+
+    return 1;
 }
 
-void ssl_free_wbio_buffer(SSL *s)
+int ssl_free_wbio_buffer(SSL *s)
 {
+    /* callers ensure s is never null */
     if (s->bbio == NULL)
-        return;
+        return 1;
 
-    if (s->bbio == s->wbio) {
-        /* remove buffering */
-        s->wbio = BIO_pop(s->wbio);
-#ifdef REF_CHECK                /* not the usual REF_CHECK, but this avoids
-                                 * adding one more preprocessor symbol */
-        assert(s->wbio != NULL);
-#endif
-    }
+    s->wbio = BIO_pop(s->wbio);
     BIO_free(s->bbio);
     s->bbio = NULL;
+
+    return 1;
 }
 
 void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
@@ -3136,7 +3901,7 @@ void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
 
 int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
 {
-    return (ctx->quiet_shutdown);
+    return ctx->quiet_shutdown;
 }
 
 void SSL_set_quiet_shutdown(SSL *s, int mode)
@@ -3146,7 +3911,7 @@ void SSL_set_quiet_shutdown(SSL *s, int mode)
 
 int SSL_get_quiet_shutdown(const SSL *s)
 {
-    return (s->quiet_shutdown);
+    return s->quiet_shutdown;
 }
 
 void SSL_set_shutdown(SSL *s, int mode)
@@ -3156,60 +3921,50 @@ void SSL_set_shutdown(SSL *s, int mode)
 
 int SSL_get_shutdown(const SSL *s)
 {
-    return (s->shutdown);
+    return s->shutdown;
 }
 
 int SSL_version(const SSL *s)
 {
-    return (s->version);
+    return s->version;
+}
+
+int SSL_client_version(const SSL *s)
+{
+    return s->client_version;
 }
 
 SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
 {
-    return (ssl->ctx);
+    return ssl->ctx;
 }
 
 SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
 {
-    CERT *ocert = ssl->cert;
+    CERT *new_cert;
     if (ssl->ctx == ctx)
         return ssl->ctx;
-#ifndef OPENSSL_NO_TLSEXT
     if (ctx == NULL)
-        ctx = ssl->initial_ctx;
-#endif
-    ssl->cert = ssl_cert_dup(ctx->cert);
-    if (ocert) {
-        int i;
-        /* Preserve any already negotiated parameters */
-        if (ssl->server) {
-            ssl->cert->peer_sigalgs = ocert->peer_sigalgs;
-            ssl->cert->peer_sigalgslen = ocert->peer_sigalgslen;
-            ocert->peer_sigalgs = NULL;
-            ssl->cert->ciphers_raw = ocert->ciphers_raw;
-            ssl->cert->ciphers_rawlen = ocert->ciphers_rawlen;
-            ocert->ciphers_raw = NULL;
-        }
-        for (i = 0; i < SSL_PKEY_NUM; i++) {
-            ssl->cert->pkeys[i].digest = ocert->pkeys[i].digest;
-        }
-#ifndef OPENSSL_NO_TLSEXT
-        ssl->cert->alpn_proposed = ocert->alpn_proposed;
-        ssl->cert->alpn_proposed_len = ocert->alpn_proposed_len;
-        ocert->alpn_proposed = NULL;
-        ssl->cert->alpn_sent = ocert->alpn_sent;
-
-        if (!custom_exts_copy_flags(&ssl->cert->srv_ext, &ocert->srv_ext))
-            return NULL;
-#endif
-        ssl_cert_free(ocert);
+        ctx = ssl->session_ctx;
+    new_cert = ssl_cert_dup(ctx->cert);
+    if (new_cert == NULL) {
+        return NULL;
     }
 
+    if (!custom_exts_copy_flags(&new_cert->custext, &ssl->cert->custext)) {
+        ssl_cert_free(new_cert);
+        return NULL;
+    }
+
+    ssl_cert_free(ssl->cert);
+    ssl->cert = new_cert;
+
     /*
      * Program invariant: |sid_ctx| has fixed size (SSL_MAX_SID_CTX_LENGTH),
      * so setter APIs must prevent invalid lengths from entering the system.
      */
-    OPENSSL_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx));
+    if (!ossl_assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)))
+        return NULL;
 
     /*
      * If the session ID context matches that of the parent SSL_CTX,
@@ -3224,26 +3979,54 @@ SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx)
         memcpy(&ssl->sid_ctx, &ctx->sid_ctx, sizeof(ssl->sid_ctx));
     }
 
-    CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
-    if (ssl->ctx != NULL)
-        SSL_CTX_free(ssl->ctx); /* decrement reference count */
+    SSL_CTX_up_ref(ctx);
+    SSL_CTX_free(ssl->ctx);     /* decrement reference count */
     ssl->ctx = ctx;
 
-    return (ssl->ctx);
+    return ssl->ctx;
 }
 
-#ifndef OPENSSL_NO_STDIO
 int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
 {
-    return (X509_STORE_set_default_paths(ctx->cert_store));
+    return X509_STORE_set_default_paths(ctx->cert_store);
+}
+
+int SSL_CTX_set_default_verify_dir(SSL_CTX *ctx)
+{
+    X509_LOOKUP *lookup;
+
+    lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_hash_dir());
+    if (lookup == NULL)
+        return 0;
+    X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT);
+
+    /* Clear any errors if the default directory does not exist */
+    ERR_clear_error();
+
+    return 1;
+}
+
+int SSL_CTX_set_default_verify_file(SSL_CTX *ctx)
+{
+    X509_LOOKUP *lookup;
+
+    lookup = X509_STORE_add_lookup(ctx->cert_store, X509_LOOKUP_file());
+    if (lookup == NULL)
+        return 0;
+
+    X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT);
+
+    /* Clear any errors if the default file does not exist */
+    ERR_clear_error();
+
+    return 1;
 }
 
 int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
                                   const char *CApath)
 {
-    return (X509_STORE_load_locations(ctx->cert_store, CAfile, CApath));
+    return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath);
 }
-#endif
 
 void SSL_set_info_callback(SSL *ssl,
                            void (*cb) (const SSL *ssl, int type, int val))
@@ -3261,120 +4044,101 @@ void (*SSL_get_info_callback(const SSL *ssl)) (const SSL * /* ssl */ ,
     return ssl->info_callback;
 }
 
-int SSL_state(const SSL *ssl)
+void SSL_set_verify_result(SSL *ssl, long arg)
 {
-    return (ssl->state);
+    ssl->verify_result = arg;
 }
 
-void SSL_set_state(SSL *ssl, int state)
+long SSL_get_verify_result(const SSL *ssl)
 {
-    ssl->state = state;
+    return ssl->verify_result;
 }
 
-void SSL_set_verify_result(SSL *ssl, long arg)
+size_t SSL_get_client_random(const SSL *ssl, unsigned char *out, size_t outlen)
 {
-    ssl->verify_result = arg;
+    if (outlen == 0)
+        return sizeof(ssl->s3->client_random);
+    if (outlen > sizeof(ssl->s3->client_random))
+        outlen = sizeof(ssl->s3->client_random);
+    memcpy(out, ssl->s3->client_random, outlen);
+    return outlen;
 }
 
-long SSL_get_verify_result(const SSL *ssl)
+size_t SSL_get_server_random(const SSL *ssl, unsigned char *out, size_t outlen)
 {
-    return (ssl->verify_result);
+    if (outlen == 0)
+        return sizeof(ssl->s3->server_random);
+    if (outlen > sizeof(ssl->s3->server_random))
+        outlen = sizeof(ssl->s3->server_random);
+    memcpy(out, ssl->s3->server_random, outlen);
+    return outlen;
 }
 
-int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
-                         CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+size_t SSL_SESSION_get_master_key(const SSL_SESSION *session,
+                                  unsigned char *out, size_t outlen)
 {
-    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,
-                                   new_func, dup_func, free_func);
+    if (outlen == 0)
+        return session->master_key_length;
+    if (outlen > session->master_key_length)
+        outlen = session->master_key_length;
+    memcpy(out, session->master_key, outlen);
+    return outlen;
 }
 
-int SSL_set_ex_data(SSL *s, int idx, void *arg)
+int SSL_SESSION_set1_master_key(SSL_SESSION *sess, const unsigned char *in,
+                                size_t len)
 {
-    return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
+    if (len > sizeof(sess->master_key))
+        return 0;
+
+    memcpy(sess->master_key, in, len);
+    sess->master_key_length = len;
+    return 1;
 }
 
-void *SSL_get_ex_data(const SSL *s, int idx)
+
+int SSL_set_ex_data(SSL *s, int idx, void *arg)
 {
-    return (CRYPTO_get_ex_data(&s->ex_data, idx));
+    return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
 }
 
-int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
-                             CRYPTO_EX_dup *dup_func,
-                             CRYPTO_EX_free *free_func)
+void *SSL_get_ex_data(const SSL *s, int idx)
 {
-    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,
-                                   new_func, dup_func, free_func);
+    return CRYPTO_get_ex_data(&s->ex_data, idx);
 }
 
 int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
 {
-    return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
+    return CRYPTO_set_ex_data(&s->ex_data, idx, arg);
 }
 
 void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
 {
-    return (CRYPTO_get_ex_data(&s->ex_data, idx));
-}
-
-int ssl_ok(SSL *s)
-{
-    return (1);
+    return CRYPTO_get_ex_data(&s->ex_data, idx);
 }
 
 X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
 {
-    return (ctx->cert_store);
+    return ctx->cert_store;
 }
 
 void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
 {
-    if (ctx->cert_store != NULL)
-        X509_STORE_free(ctx->cert_store);
+    X509_STORE_free(ctx->cert_store);
     ctx->cert_store = store;
 }
 
-int SSL_want(const SSL *s)
+void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
 {
-    return (s->rwstate);
+    if (store != NULL)
+        X509_STORE_up_ref(store);
+    SSL_CTX_set_cert_store(ctx, store);
 }
 
-/**
- * \brief Set the callback for generating temporary RSA keys.
- * \param ctx the SSL context.
- * \param cb the callback
- */
-
-#ifndef OPENSSL_NO_RSA
-void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb) (SSL *ssl,
-                                                            int is_export,
-                                                            int keylength))
-{
-    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb);
-}
-
-void SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb) (SSL *ssl,
-                                                    int is_export,
-                                                    int keylength))
-{
-    SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb);
-}
-#endif
-
-#ifdef DOXYGEN
-/**
- * \brief The RSA temporary key callback function.
- * \param ssl the SSL session.
- * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.
- * \param keylength if \c is_export is \c TRUE, then \c keylength is the size
- * of the required key in bits.
- * \return the temporary RSA key.
- * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback
- */
-
-RSA *cb(SSL *ssl, int is_export, int keylength)
+int SSL_want(const SSL *s)
 {
+    return s->rwstate;
 }
-#endif
 
 /**
  * \brief Set the callback for generating temporary DH keys.
@@ -3397,39 +4161,20 @@ void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh) (SSL *ssl, int is_export,
 }
 #endif
 
-#ifndef OPENSSL_NO_ECDH
-void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,
-                                   EC_KEY *(*ecdh) (SSL *ssl, int is_export,
-                                                    int keylength))
-{
-    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB,
-                          (void (*)(void))ecdh);
-}
-
-void SSL_set_tmp_ecdh_callback(SSL *ssl,
-                               EC_KEY *(*ecdh) (SSL *ssl, int is_export,
-                                                int keylength))
-{
-    SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh);
-}
-#endif
-
 #ifndef OPENSSL_NO_PSK
 int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
 {
     if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
-        SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT,
-               SSL_R_DATA_LENGTH_TOO_LONG);
+        SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
         return 0;
     }
-    if (ctx->psk_identity_hint != NULL)
-        OPENSSL_free(ctx->psk_identity_hint);
+    OPENSSL_free(ctx->cert->psk_identity_hint);
     if (identity_hint != NULL) {
-        ctx->psk_identity_hint = BUF_strdup(identity_hint);
-        if (ctx->psk_identity_hint == NULL)
+        ctx->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
+        if (ctx->cert->psk_identity_hint == NULL)
             return 0;
     } else
-        ctx->psk_identity_hint = NULL;
+        ctx->cert->psk_identity_hint = NULL;
     return 1;
 }
 
@@ -3438,21 +4183,17 @@ int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
     if (s == NULL)
         return 0;
 
-    if (s->session == NULL)
-        return 1;               /* session not created yet, ignored */
-
     if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) {
         SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
         return 0;
     }
-    if (s->session->psk_identity_hint != NULL)
-        OPENSSL_free(s->session->psk_identity_hint);
+    OPENSSL_free(s->cert->psk_identity_hint);
     if (identity_hint != NULL) {
-        s->session->psk_identity_hint = BUF_strdup(identity_hint);
-        if (s->session->psk_identity_hint == NULL)
+        s->cert->psk_identity_hint = OPENSSL_strdup(identity_hint);
+        if (s->cert->psk_identity_hint == NULL)
             return 0;
     } else
-        s->session->psk_identity_hint = NULL;
+        s->cert->psk_identity_hint = NULL;
     return 1;
 }
 
@@ -3460,63 +4201,59 @@ const char *SSL_get_psk_identity_hint(const SSL *s)
 {
     if (s == NULL || s->session == NULL)
         return NULL;
-    return (s->session->psk_identity_hint);
+    return s->session->psk_identity_hint;
 }
 
 const char *SSL_get_psk_identity(const SSL *s)
 {
     if (s == NULL || s->session == NULL)
         return NULL;
-    return (s->session->psk_identity);
+    return s->session->psk_identity;
 }
 
-void SSL_set_psk_client_callback(SSL *s,
-                                 unsigned int (*cb) (SSL *ssl,
-                                                     const char *hint,
-                                                     char *identity,
-                                                     unsigned int
-                                                     max_identity_len,
-                                                     unsigned char *psk,
-                                                     unsigned int
-                                                     max_psk_len))
+void SSL_set_psk_client_callback(SSL *s, SSL_psk_client_cb_func cb)
 {
     s->psk_client_callback = cb;
 }
 
-void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
-                                     unsigned int (*cb) (SSL *ssl,
-                                                         const char *hint,
-                                                         char *identity,
-                                                         unsigned int
-                                                         max_identity_len,
-                                                         unsigned char *psk,
-                                                         unsigned int
-                                                         max_psk_len))
+void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx, SSL_psk_client_cb_func cb)
 {
     ctx->psk_client_callback = cb;
 }
 
-void SSL_set_psk_server_callback(SSL *s,
-                                 unsigned int (*cb) (SSL *ssl,
-                                                     const char *identity,
-                                                     unsigned char *psk,
-                                                     unsigned int
-                                                     max_psk_len))
+void SSL_set_psk_server_callback(SSL *s, SSL_psk_server_cb_func cb)
 {
     s->psk_server_callback = cb;
 }
 
-void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
-                                     unsigned int (*cb) (SSL *ssl,
-                                                         const char *identity,
-                                                         unsigned char *psk,
-                                                         unsigned int
-                                                         max_psk_len))
+void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx, SSL_psk_server_cb_func cb)
 {
     ctx->psk_server_callback = cb;
 }
 #endif
 
+void SSL_set_psk_find_session_callback(SSL *s, SSL_psk_find_session_cb_func cb)
+{
+    s->psk_find_session_cb = cb;
+}
+
+void SSL_CTX_set_psk_find_session_callback(SSL_CTX *ctx,
+                                           SSL_psk_find_session_cb_func cb)
+{
+    ctx->psk_find_session_cb = cb;
+}
+
+void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
+{
+    s->psk_use_session_cb = cb;
+}
+
+void SSL_CTX_set_psk_use_session_callback(SSL_CTX *ctx,
+                                           SSL_psk_use_session_cb_func cb)
+{
+    ctx->psk_use_session_cb = cb;
+}
+
 void SSL_CTX_set_msg_callback(SSL_CTX *ctx,
                               void (*cb) (int write_p, int version,
                                           int content_type, const void *buf,
@@ -3533,19 +4270,118 @@ void SSL_set_msg_callback(SSL *ssl,
     SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
 }
 
+void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx,
+                                                int (*cb) (SSL *ssl,
+                                                           int
+                                                           is_forward_secure))
+{
+    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
+                          (void (*)(void))cb);
+}
+
+void SSL_set_not_resumable_session_callback(SSL *ssl,
+                                            int (*cb) (SSL *ssl,
+                                                       int is_forward_secure))
+{
+    SSL_callback_ctrl(ssl, SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB,
+                      (void (*)(void))cb);
+}
+
+void SSL_CTX_set_record_padding_callback(SSL_CTX *ctx,
+                                         size_t (*cb) (SSL *ssl, int type,
+                                                       size_t len, void *arg))
+{
+    ctx->record_padding_cb = cb;
+}
+
+void SSL_CTX_set_record_padding_callback_arg(SSL_CTX *ctx, void *arg)
+{
+    ctx->record_padding_arg = arg;
+}
+
+void *SSL_CTX_get_record_padding_callback_arg(SSL_CTX *ctx)
+{
+    return ctx->record_padding_arg;
+}
+
+int SSL_CTX_set_block_padding(SSL_CTX *ctx, size_t block_size)
+{
+    /* block size of 0 or 1 is basically no padding */
+    if (block_size == 1)
+        ctx->block_padding = 0;
+    else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
+        ctx->block_padding = block_size;
+    else
+        return 0;
+    return 1;
+}
+
+void SSL_set_record_padding_callback(SSL *ssl,
+                                     size_t (*cb) (SSL *ssl, int type,
+                                                   size_t len, void *arg))
+{
+    ssl->record_padding_cb = cb;
+}
+
+void SSL_set_record_padding_callback_arg(SSL *ssl, void *arg)
+{
+    ssl->record_padding_arg = arg;
+}
+
+void *SSL_get_record_padding_callback_arg(SSL *ssl)
+{
+    return ssl->record_padding_arg;
+}
+
+int SSL_set_block_padding(SSL *ssl, size_t block_size)
+{
+    /* block size of 0 or 1 is basically no padding */
+    if (block_size == 1)
+        ssl->block_padding = 0;
+    else if (block_size <= SSL3_RT_MAX_PLAIN_LENGTH)
+        ssl->block_padding = block_size;
+    else
+        return 0;
+    return 1;
+}
+
+int SSL_set_num_tickets(SSL *s, size_t num_tickets)
+{
+    s->num_tickets = num_tickets;
+
+    return 1;
+}
+
+size_t SSL_get_num_tickets(SSL *s)
+{
+    return s->num_tickets;
+}
+
+int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
+{
+    ctx->num_tickets = num_tickets;
+
+    return 1;
+}
+
+size_t SSL_CTX_get_num_tickets(SSL_CTX *ctx)
+{
+    return ctx->num_tickets;
+}
+
 /*
  * Allocates new EVP_MD_CTX and sets pointer to it into given pointer
- * vairable, freeing EVP_MD_CTX previously stored in that variable, if any.
- * If EVP_MD pointer is passed, initializes ctx with this md Returns newly
- * allocated ctx;
+ * variable, freeing EVP_MD_CTX previously stored in that variable, if any.
+ * If EVP_MD pointer is passed, initializes ctx with this |md|.
+ * Returns the newly allocated ctx;
  */
 
 EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
 {
     ssl_clear_hash_ctx(hash);
-    *hash = EVP_MD_CTX_create();
+    *hash = EVP_MD_CTX_new();
     if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
-        EVP_MD_CTX_destroy(*hash);
+        EVP_MD_CTX_free(*hash);
         *hash = NULL;
         return NULL;
     }
@@ -3555,30 +4391,1141 @@ EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
 void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
 {
 
-    if (*hash)
-        EVP_MD_CTX_destroy(*hash);
+    EVP_MD_CTX_free(*hash);
     *hash = NULL;
 }
 
-void SSL_set_debug(SSL *s, int debug)
+/* Retrieve handshake hashes */
+int ssl_handshake_hash(SSL *s, unsigned char *out, size_t outlen,
+                       size_t *hashlen)
 {
-    s->debug = debug;
+    EVP_MD_CTX *ctx = NULL;
+    EVP_MD_CTX *hdgst = s->s3->handshake_dgst;
+    int hashleni = EVP_MD_CTX_size(hdgst);
+    int ret = 0;
+
+    if (hashleni < 0 || (size_t)hashleni > outlen) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
+                 ERR_R_INTERNAL_ERROR);
+        goto err;
+    }
+
+    ctx = EVP_MD_CTX_new();
+    if (ctx == NULL)
+        goto err;
+
+    if (!EVP_MD_CTX_copy_ex(ctx, hdgst)
+        || EVP_DigestFinal_ex(ctx, out, NULL) <= 0) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_HANDSHAKE_HASH,
+                 ERR_R_INTERNAL_ERROR);
+        goto err;
+    }
+
+    *hashlen = hashleni;
+
+    ret = 1;
+ err:
+    EVP_MD_CTX_free(ctx);
+    return ret;
 }
 
-int SSL_cache_hit(SSL *s)
+int SSL_session_reused(SSL *s)
 {
     return s->hit;
 }
 
-int SSL_is_server(SSL *s)
+int SSL_is_server(const SSL *s)
 {
     return s->server;
 }
 
-#if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
-# include "../crypto/bio/bss_file.c"
+#if OPENSSL_API_COMPAT < 0x10100000L
+void SSL_set_debug(SSL *s, int debug)
+{
+    /* Old function was do-nothing anyway... */
+    (void)s;
+    (void)debug;
+}
 #endif
 
-IMPLEMENT_STACK_OF(SSL_CIPHER)
-IMPLEMENT_STACK_OF(SSL_COMP)
+void SSL_set_security_level(SSL *s, int level)
+{
+    s->cert->sec_level = level;
+}
+
+int SSL_get_security_level(const SSL *s)
+{
+    return s->cert->sec_level;
+}
+
+void SSL_set_security_callback(SSL *s,
+                               int (*cb) (const SSL *s, const SSL_CTX *ctx,
+                                          int op, int bits, int nid,
+                                          void *other, void *ex))
+{
+    s->cert->sec_cb = cb;
+}
+
+int (*SSL_get_security_callback(const SSL *s)) (const SSL *s,
+                                                const SSL_CTX *ctx, int op,
+                                                int bits, int nid, void *other,
+                                                void *ex) {
+    return s->cert->sec_cb;
+}
+
+void SSL_set0_security_ex_data(SSL *s, void *ex)
+{
+    s->cert->sec_ex = ex;
+}
+
+void *SSL_get0_security_ex_data(const SSL *s)
+{
+    return s->cert->sec_ex;
+}
+
+void SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
+{
+    ctx->cert->sec_level = level;
+}
+
+int SSL_CTX_get_security_level(const SSL_CTX *ctx)
+{
+    return ctx->cert->sec_level;
+}
+
+void SSL_CTX_set_security_callback(SSL_CTX *ctx,
+                                   int (*cb) (const SSL *s, const SSL_CTX *ctx,
+                                              int op, int bits, int nid,
+                                              void *other, void *ex))
+{
+    ctx->cert->sec_cb = cb;
+}
+
+int (*SSL_CTX_get_security_callback(const SSL_CTX *ctx)) (const SSL *s,
+                                                          const SSL_CTX *ctx,
+                                                          int op, int bits,
+                                                          int nid,
+                                                          void *other,
+                                                          void *ex) {
+    return ctx->cert->sec_cb;
+}
+
+void SSL_CTX_set0_security_ex_data(SSL_CTX *ctx, void *ex)
+{
+    ctx->cert->sec_ex = ex;
+}
+
+void *SSL_CTX_get0_security_ex_data(const SSL_CTX *ctx)
+{
+    return ctx->cert->sec_ex;
+}
+
+/*
+ * Get/Set/Clear options in SSL_CTX or SSL, formerly macros, now functions that
+ * can return unsigned long, instead of the generic long return value from the
+ * control interface.
+ */
+unsigned long SSL_CTX_get_options(const SSL_CTX *ctx)
+{
+    return ctx->options;
+}
+
+unsigned long SSL_get_options(const SSL *s)
+{
+    return s->options;
+}
+
+unsigned long SSL_CTX_set_options(SSL_CTX *ctx, unsigned long op)
+{
+    return ctx->options |= op;
+}
+
+unsigned long SSL_set_options(SSL *s, unsigned long op)
+{
+    return s->options |= op;
+}
+
+unsigned long SSL_CTX_clear_options(SSL_CTX *ctx, unsigned long op)
+{
+    return ctx->options &= ~op;
+}
+
+unsigned long SSL_clear_options(SSL *s, unsigned long op)
+{
+    return s->options &= ~op;
+}
+
+STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s)
+{
+    return s->verified_chain;
+}
+
 IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);
+
+#ifndef OPENSSL_NO_CT
+
+/*
+ * Moves SCTs from the |src| stack to the |dst| stack.
+ * The source of each SCT will be set to |origin|.
+ * If |dst| points to a NULL pointer, a new stack will be created and owned by
+ * the caller.
+ * Returns the number of SCTs moved, or a negative integer if an error occurs.
+ */
+static int ct_move_scts(STACK_OF(SCT) **dst, STACK_OF(SCT) *src,
+                        sct_source_t origin)
+{
+    int scts_moved = 0;
+    SCT *sct = NULL;
+
+    if (*dst == NULL) {
+        *dst = sk_SCT_new_null();
+        if (*dst == NULL) {
+            SSLerr(SSL_F_CT_MOVE_SCTS, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+    }
+
+    while ((sct = sk_SCT_pop(src)) != NULL) {
+        if (SCT_set_source(sct, origin) != 1)
+            goto err;
+
+        if (sk_SCT_push(*dst, sct) <= 0)
+            goto err;
+        scts_moved += 1;
+    }
+
+    return scts_moved;
+ err:
+    if (sct != NULL)
+        sk_SCT_push(src, sct);  /* Put the SCT back */
+    return -1;
+}
+
+/*
+ * Look for data collected during ServerHello and parse if found.
+ * Returns the number of SCTs extracted.
+ */
+static int ct_extract_tls_extension_scts(SSL *s)
+{
+    int scts_extracted = 0;
+
+    if (s->ext.scts != NULL) {
+        const unsigned char *p = s->ext.scts;
+        STACK_OF(SCT) *scts = o2i_SCT_LIST(NULL, &p, s->ext.scts_len);
+
+        scts_extracted = ct_move_scts(&s->scts, scts, SCT_SOURCE_TLS_EXTENSION);
+
+        SCT_LIST_free(scts);
+    }
+
+    return scts_extracted;
+}
+
+/*
+ * Checks for an OCSP response and then attempts to extract any SCTs found if it
+ * contains an SCT X509 extension. They will be stored in |s->scts|.
+ * Returns:
+ * - The number of SCTs extracted, assuming an OCSP response exists.
+ * - 0 if no OCSP response exists or it contains no SCTs.
+ * - A negative integer if an error occurs.
+ */
+static int ct_extract_ocsp_response_scts(SSL *s)
+{
+# ifndef OPENSSL_NO_OCSP
+    int scts_extracted = 0;
+    const unsigned char *p;
+    OCSP_BASICRESP *br = NULL;
+    OCSP_RESPONSE *rsp = NULL;
+    STACK_OF(SCT) *scts = NULL;
+    int i;
+
+    if (s->ext.ocsp.resp == NULL || s->ext.ocsp.resp_len == 0)
+        goto err;
+
+    p = s->ext.ocsp.resp;
+    rsp = d2i_OCSP_RESPONSE(NULL, &p, (int)s->ext.ocsp.resp_len);
+    if (rsp == NULL)
+        goto err;
+
+    br = OCSP_response_get1_basic(rsp);
+    if (br == NULL)
+        goto err;
+
+    for (i = 0; i < OCSP_resp_count(br); ++i) {
+        OCSP_SINGLERESP *single = OCSP_resp_get0(br, i);
+
+        if (single == NULL)
+            continue;
+
+        scts =
+            OCSP_SINGLERESP_get1_ext_d2i(single, NID_ct_cert_scts, NULL, NULL);
+        scts_extracted =
+            ct_move_scts(&s->scts, scts, SCT_SOURCE_OCSP_STAPLED_RESPONSE);
+        if (scts_extracted < 0)
+            goto err;
+    }
+ err:
+    SCT_LIST_free(scts);
+    OCSP_BASICRESP_free(br);
+    OCSP_RESPONSE_free(rsp);
+    return scts_extracted;
+# else
+    /* Behave as if no OCSP response exists */
+    return 0;
+# endif
+}
+
+/*
+ * Attempts to extract SCTs from the peer certificate.
+ * Return the number of SCTs extracted, or a negative integer if an error
+ * occurs.
+ */
+static int ct_extract_x509v3_extension_scts(SSL *s)
+{
+    int scts_extracted = 0;
+    X509 *cert = s->session != NULL ? s->session->peer : NULL;
+
+    if (cert != NULL) {
+        STACK_OF(SCT) *scts =
+            X509_get_ext_d2i(cert, NID_ct_precert_scts, NULL, NULL);
+
+        scts_extracted =
+            ct_move_scts(&s->scts, scts, SCT_SOURCE_X509V3_EXTENSION);
+
+        SCT_LIST_free(scts);
+    }
+
+    return scts_extracted;
+}
+
+/*
+ * Attempts to find all received SCTs by checking TLS extensions, the OCSP
+ * response (if it exists) and X509v3 extensions in the certificate.
+ * Returns NULL if an error occurs.
+ */
+const STACK_OF(SCT) *SSL_get0_peer_scts(SSL *s)
+{
+    if (!s->scts_parsed) {
+        if (ct_extract_tls_extension_scts(s) < 0 ||
+            ct_extract_ocsp_response_scts(s) < 0 ||
+            ct_extract_x509v3_extension_scts(s) < 0)
+            goto err;
+
+        s->scts_parsed = 1;
+    }
+    return s->scts;
+ err:
+    return NULL;
+}
+
+static int ct_permissive(const CT_POLICY_EVAL_CTX * ctx,
+                         const STACK_OF(SCT) *scts, void *unused_arg)
+{
+    return 1;
+}
+
+static int ct_strict(const CT_POLICY_EVAL_CTX * ctx,
+                     const STACK_OF(SCT) *scts, void *unused_arg)
+{
+    int count = scts != NULL ? sk_SCT_num(scts) : 0;
+    int i;
+
+    for (i = 0; i < count; ++i) {
+        SCT *sct = sk_SCT_value(scts, i);
+        int status = SCT_get_validation_status(sct);
+
+        if (status == SCT_VALIDATION_STATUS_VALID)
+            return 1;
+    }
+    SSLerr(SSL_F_CT_STRICT, SSL_R_NO_VALID_SCTS);
+    return 0;
+}
+
+int SSL_set_ct_validation_callback(SSL *s, ssl_ct_validation_cb callback,
+                                   void *arg)
+{
+    /*
+     * Since code exists that uses the custom extension handler for CT, look
+     * for this and throw an error if they have already registered to use CT.
+     */
+    if (callback != NULL && SSL_CTX_has_client_custom_ext(s->ctx,
+                                                          TLSEXT_TYPE_signed_certificate_timestamp))
+    {
+        SSLerr(SSL_F_SSL_SET_CT_VALIDATION_CALLBACK,
+               SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
+        return 0;
+    }
+
+    if (callback != NULL) {
+        /*
+         * If we are validating CT, then we MUST accept SCTs served via OCSP
+         */
+        if (!SSL_set_tlsext_status_type(s, TLSEXT_STATUSTYPE_ocsp))
+            return 0;
+    }
+
+    s->ct_validation_callback = callback;
+    s->ct_validation_callback_arg = arg;
+
+    return 1;
+}
+
+int SSL_CTX_set_ct_validation_callback(SSL_CTX *ctx,
+                                       ssl_ct_validation_cb callback, void *arg)
+{
+    /*
+     * Since code exists that uses the custom extension handler for CT, look for
+     * this and throw an error if they have already registered to use CT.
+     */
+    if (callback != NULL && SSL_CTX_has_client_custom_ext(ctx,
+                                                          TLSEXT_TYPE_signed_certificate_timestamp))
+    {
+        SSLerr(SSL_F_SSL_CTX_SET_CT_VALIDATION_CALLBACK,
+               SSL_R_CUSTOM_EXT_HANDLER_ALREADY_INSTALLED);
+        return 0;
+    }
+
+    ctx->ct_validation_callback = callback;
+    ctx->ct_validation_callback_arg = arg;
+    return 1;
+}
+
+int SSL_ct_is_enabled(const SSL *s)
+{
+    return s->ct_validation_callback != NULL;
+}
+
+int SSL_CTX_ct_is_enabled(const SSL_CTX *ctx)
+{
+    return ctx->ct_validation_callback != NULL;
+}
+
+int ssl_validate_ct(SSL *s)
+{
+    int ret = 0;
+    X509 *cert = s->session != NULL ? s->session->peer : NULL;
+    X509 *issuer;
+    SSL_DANE *dane = &s->dane;
+    CT_POLICY_EVAL_CTX *ctx = NULL;
+    const STACK_OF(SCT) *scts;
+
+    /*
+     * If no callback is set, the peer is anonymous, or its chain is invalid,
+     * skip SCT validation - just return success.  Applications that continue
+     * handshakes without certificates, with unverified chains, or pinned leaf
+     * certificates are outside the scope of the WebPKI and CT.
+     *
+     * The above exclusions notwithstanding the vast majority of peers will
+     * have rather ordinary certificate chains validated by typical
+     * applications that perform certificate verification and therefore will
+     * process SCTs when enabled.
+     */
+    if (s->ct_validation_callback == NULL || cert == NULL ||
+        s->verify_result != X509_V_OK ||
+        s->verified_chain == NULL || sk_X509_num(s->verified_chain) <= 1)
+        return 1;
+
+    /*
+     * CT not applicable for chains validated via DANE-TA(2) or DANE-EE(3)
+     * trust-anchors.  See https://tools.ietf.org/html/rfc7671#section-4.2
+     */
+    if (DANETLS_ENABLED(dane) && dane->mtlsa != NULL) {
+        switch (dane->mtlsa->usage) {
+        case DANETLS_USAGE_DANE_TA:
+        case DANETLS_USAGE_DANE_EE:
+            return 1;
+        }
+    }
+
+    ctx = CT_POLICY_EVAL_CTX_new();
+    if (ctx == NULL) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_VALIDATE_CT,
+                 ERR_R_MALLOC_FAILURE);
+        goto end;
+    }
+
+    issuer = sk_X509_value(s->verified_chain, 1);
+    CT_POLICY_EVAL_CTX_set1_cert(ctx, cert);
+    CT_POLICY_EVAL_CTX_set1_issuer(ctx, issuer);
+    CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(ctx, s->ctx->ctlog_store);
+    CT_POLICY_EVAL_CTX_set_time(
+            ctx, (uint64_t)SSL_SESSION_get_time(SSL_get0_session(s)) * 1000);
+
+    scts = SSL_get0_peer_scts(s);
+
+    /*
+     * This function returns success (> 0) only when all the SCTs are valid, 0
+     * when some are invalid, and < 0 on various internal errors (out of
+     * memory, etc.).  Having some, or even all, invalid SCTs is not sufficient
+     * reason to abort the handshake, that decision is up to the callback.
+     * Therefore, we error out only in the unexpected case that the return
+     * value is negative.
+     *
+     * XXX: One might well argue that the return value of this function is an
+     * unfortunate design choice.  Its job is only to determine the validation
+     * status of each of the provided SCTs.  So long as it correctly separates
+     * the wheat from the chaff it should return success.  Failure in this case
+     * ought to correspond to an inability to carry out its duties.
+     */
+    if (SCT_LIST_validate(scts, ctx) < 0) {
+        SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
+                 SSL_R_SCT_VERIFICATION_FAILED);
+        goto end;
+    }
+
+    ret = s->ct_validation_callback(ctx, scts, s->ct_validation_callback_arg);
+    if (ret < 0)
+        ret = 0;                /* This function returns 0 on failure */
+    if (!ret)
+        SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_SSL_VALIDATE_CT,
+                 SSL_R_CALLBACK_FAILED);
+
+ end:
+    CT_POLICY_EVAL_CTX_free(ctx);
+    /*
+     * With SSL_VERIFY_NONE the session may be cached and re-used despite a
+     * failure return code here.  Also the application may wish the complete
+     * the handshake, and then disconnect cleanly at a higher layer, after
+     * checking the verification status of the completed connection.
+     *
+     * We therefore force a certificate verification failure which will be
+     * visible via SSL_get_verify_result() and cached as part of any resumed
+     * session.
+     *
+     * Note: the permissive callback is for information gathering only, always
+     * returns success, and does not affect verification status.  Only the
+     * strict callback or a custom application-specified callback can trigger
+     * connection failure or record a verification error.
+     */
+    if (ret <= 0)
+        s->verify_result = X509_V_ERR_NO_VALID_SCTS;
+    return ret;
+}
+
+int SSL_CTX_enable_ct(SSL_CTX *ctx, int validation_mode)
+{
+    switch (validation_mode) {
+    default:
+        SSLerr(SSL_F_SSL_CTX_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
+        return 0;
+    case SSL_CT_VALIDATION_PERMISSIVE:
+        return SSL_CTX_set_ct_validation_callback(ctx, ct_permissive, NULL);
+    case SSL_CT_VALIDATION_STRICT:
+        return SSL_CTX_set_ct_validation_callback(ctx, ct_strict, NULL);
+    }
+}
+
+int SSL_enable_ct(SSL *s, int validation_mode)
+{
+    switch (validation_mode) {
+    default:
+        SSLerr(SSL_F_SSL_ENABLE_CT, SSL_R_INVALID_CT_VALIDATION_TYPE);
+        return 0;
+    case SSL_CT_VALIDATION_PERMISSIVE:
+        return SSL_set_ct_validation_callback(s, ct_permissive, NULL);
+    case SSL_CT_VALIDATION_STRICT:
+        return SSL_set_ct_validation_callback(s, ct_strict, NULL);
+    }
+}
+
+int SSL_CTX_set_default_ctlog_list_file(SSL_CTX *ctx)
+{
+    return CTLOG_STORE_load_default_file(ctx->ctlog_store);
+}
+
+int SSL_CTX_set_ctlog_list_file(SSL_CTX *ctx, const char *path)
+{
+    return CTLOG_STORE_load_file(ctx->ctlog_store, path);
+}
+
+void SSL_CTX_set0_ctlog_store(SSL_CTX *ctx, CTLOG_STORE * logs)
+{
+    CTLOG_STORE_free(ctx->ctlog_store);
+    ctx->ctlog_store = logs;
+}
+
+const CTLOG_STORE *SSL_CTX_get0_ctlog_store(const SSL_CTX *ctx)
+{
+    return ctx->ctlog_store;
+}
+
+#endif  /* OPENSSL_NO_CT */
+
+void SSL_CTX_set_client_hello_cb(SSL_CTX *c, SSL_client_hello_cb_fn cb,
+                                 void *arg)
+{
+    c->client_hello_cb = cb;
+    c->client_hello_cb_arg = arg;
+}
+
+int SSL_client_hello_isv2(SSL *s)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    return s->clienthello->isv2;
+}
+
+unsigned int SSL_client_hello_get0_legacy_version(SSL *s)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    return s->clienthello->legacy_version;
+}
+
+size_t SSL_client_hello_get0_random(SSL *s, const unsigned char **out)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    if (out != NULL)
+        *out = s->clienthello->random;
+    return SSL3_RANDOM_SIZE;
+}
+
+size_t SSL_client_hello_get0_session_id(SSL *s, const unsigned char **out)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    if (out != NULL)
+        *out = s->clienthello->session_id;
+    return s->clienthello->session_id_len;
+}
+
+size_t SSL_client_hello_get0_ciphers(SSL *s, const unsigned char **out)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    if (out != NULL)
+        *out = PACKET_data(&s->clienthello->ciphersuites);
+    return PACKET_remaining(&s->clienthello->ciphersuites);
+}
+
+size_t SSL_client_hello_get0_compression_methods(SSL *s, const unsigned char **out)
+{
+    if (s->clienthello == NULL)
+        return 0;
+    if (out != NULL)
+        *out = s->clienthello->compressions;
+    return s->clienthello->compressions_len;
+}
+
+int SSL_client_hello_get1_extensions_present(SSL *s, int **out, size_t *outlen)
+{
+    RAW_EXTENSION *ext;
+    int *present;
+    size_t num = 0, i;
+
+    if (s->clienthello == NULL || out == NULL || outlen == NULL)
+        return 0;
+    for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
+        ext = s->clienthello->pre_proc_exts + i;
+        if (ext->present)
+            num++;
+    }
+    if ((present = OPENSSL_malloc(sizeof(*present) * num)) == NULL) {
+        SSLerr(SSL_F_SSL_CLIENT_HELLO_GET1_EXTENSIONS_PRESENT,
+               ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+    for (i = 0; i < s->clienthello->pre_proc_exts_len; i++) {
+        ext = s->clienthello->pre_proc_exts + i;
+        if (ext->present) {
+            if (ext->received_order >= num)
+                goto err;
+            present[ext->received_order] = ext->type;
+        }
+    }
+    *out = present;
+    *outlen = num;
+    return 1;
+ err:
+    OPENSSL_free(present);
+    return 0;
+}
+
+int SSL_client_hello_get0_ext(SSL *s, unsigned int type, const unsigned char **out,
+                       size_t *outlen)
+{
+    size_t i;
+    RAW_EXTENSION *r;
+
+    if (s->clienthello == NULL)
+        return 0;
+    for (i = 0; i < s->clienthello->pre_proc_exts_len; ++i) {
+        r = s->clienthello->pre_proc_exts + i;
+        if (r->present && r->type == type) {
+            if (out != NULL)
+                *out = PACKET_data(&r->data);
+            if (outlen != NULL)
+                *outlen = PACKET_remaining(&r->data);
+            return 1;
+        }
+    }
+    return 0;
+}
+
+int SSL_free_buffers(SSL *ssl)
+{
+    RECORD_LAYER *rl = &ssl->rlayer;
+
+    if (RECORD_LAYER_read_pending(rl) || RECORD_LAYER_write_pending(rl))
+        return 0;
+
+    RECORD_LAYER_release(rl);
+    return 1;
+}
+
+int SSL_alloc_buffers(SSL *ssl)
+{
+    return ssl3_setup_buffers(ssl);
+}
+
+void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
+{
+    ctx->keylog_callback = cb;
+}
+
+SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
+{
+    return ctx->keylog_callback;
+}
+
+static int nss_keylog_int(const char *prefix,
+                          SSL *ssl,
+                          const uint8_t *parameter_1,
+                          size_t parameter_1_len,
+                          const uint8_t *parameter_2,
+                          size_t parameter_2_len)
+{
+    char *out = NULL;
+    char *cursor = NULL;
+    size_t out_len = 0;
+    size_t i;
+    size_t prefix_len;
+
+    if (ssl->ctx->keylog_callback == NULL) return 1;
+
+    /*
+     * Our output buffer will contain the following strings, rendered with
+     * space characters in between, terminated by a NULL character: first the
+     * prefix, then the first parameter, then the second parameter. The
+     * meaning of each parameter depends on the specific key material being
+     * logged. Note that the first and second parameters are encoded in
+     * hexadecimal, so we need a buffer that is twice their lengths.
+     */
+    prefix_len = strlen(prefix);
+    out_len = prefix_len + (2*parameter_1_len) + (2*parameter_2_len) + 3;
+    if ((out = cursor = OPENSSL_malloc(out_len)) == NULL) {
+        SSLfatal(ssl, SSL_AD_INTERNAL_ERROR, SSL_F_NSS_KEYLOG_INT,
+                 ERR_R_MALLOC_FAILURE);
+        return 0;
+    }
+
+    strcpy(cursor, prefix);
+    cursor += prefix_len;
+    *cursor++ = ' ';
+
+    for (i = 0; i < parameter_1_len; i++) {
+        sprintf(cursor, "%02x", parameter_1[i]);
+        cursor += 2;
+    }
+    *cursor++ = ' ';
+
+    for (i = 0; i < parameter_2_len; i++) {
+        sprintf(cursor, "%02x", parameter_2[i]);
+        cursor += 2;
+    }
+    *cursor = '\0';
+
+    ssl->ctx->keylog_callback(ssl, (const char *)out);
+    OPENSSL_free(out);
+    return 1;
+
+}
+
+int ssl_log_rsa_client_key_exchange(SSL *ssl,
+                                    const uint8_t *encrypted_premaster,
+                                    size_t encrypted_premaster_len,
+                                    const uint8_t *premaster,
+                                    size_t premaster_len)
+{
+    if (encrypted_premaster_len < 8) {
+        SSLfatal(ssl, SSL_AD_INTERNAL_ERROR,
+                 SSL_F_SSL_LOG_RSA_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
+        return 0;
+    }
+
+    /* We only want the first 8 bytes of the encrypted premaster as a tag. */
+    return nss_keylog_int("RSA",
+                          ssl,
+                          encrypted_premaster,
+                          8,
+                          premaster,
+                          premaster_len);
+}
+
+int ssl_log_secret(SSL *ssl,
+                   const char *label,
+                   const uint8_t *secret,
+                   size_t secret_len)
+{
+    return nss_keylog_int(label,
+                          ssl,
+                          ssl->s3->client_random,
+                          SSL3_RANDOM_SIZE,
+                          secret,
+                          secret_len);
+}
+
+#define SSLV2_CIPHER_LEN    3
+
+int ssl_cache_cipherlist(SSL *s, PACKET *cipher_suites, int sslv2format)
+{
+    int n;
+
+    n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
+
+    if (PACKET_remaining(cipher_suites) == 0) {
+        SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_SSL_CACHE_CIPHERLIST,
+                 SSL_R_NO_CIPHERS_SPECIFIED);
+        return 0;
+    }
+
+    if (PACKET_remaining(cipher_suites) % n != 0) {
+        SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
+                 SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
+        return 0;
+    }
+
+    OPENSSL_free(s->s3->tmp.ciphers_raw);
+    s->s3->tmp.ciphers_raw = NULL;
+    s->s3->tmp.ciphers_rawlen = 0;
+
+    if (sslv2format) {
+        size_t numciphers = PACKET_remaining(cipher_suites) / n;
+        PACKET sslv2ciphers = *cipher_suites;
+        unsigned int leadbyte;
+        unsigned char *raw;
+
+        /*
+         * We store the raw ciphers list in SSLv3+ format so we need to do some
+         * preprocessing to convert the list first. If there are any SSLv2 only
+         * ciphersuites with a non-zero leading byte then we are going to
+         * slightly over allocate because we won't store those. But that isn't a
+         * problem.
+         */
+        raw = OPENSSL_malloc(numciphers * TLS_CIPHER_LEN);
+        s->s3->tmp.ciphers_raw = raw;
+        if (raw == NULL) {
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
+                     ERR_R_MALLOC_FAILURE);
+            return 0;
+        }
+        for (s->s3->tmp.ciphers_rawlen = 0;
+             PACKET_remaining(&sslv2ciphers) > 0;
+             raw += TLS_CIPHER_LEN) {
+            if (!PACKET_get_1(&sslv2ciphers, &leadbyte)
+                    || (leadbyte == 0
+                        && !PACKET_copy_bytes(&sslv2ciphers, raw,
+                                              TLS_CIPHER_LEN))
+                    || (leadbyte != 0
+                        && !PACKET_forward(&sslv2ciphers, TLS_CIPHER_LEN))) {
+                SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
+                         SSL_R_BAD_PACKET);
+                OPENSSL_free(s->s3->tmp.ciphers_raw);
+                s->s3->tmp.ciphers_raw = NULL;
+                s->s3->tmp.ciphers_rawlen = 0;
+                return 0;
+            }
+            if (leadbyte == 0)
+                s->s3->tmp.ciphers_rawlen += TLS_CIPHER_LEN;
+        }
+    } else if (!PACKET_memdup(cipher_suites, &s->s3->tmp.ciphers_raw,
+                           &s->s3->tmp.ciphers_rawlen)) {
+        SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_SSL_CACHE_CIPHERLIST,
+                 ERR_R_INTERNAL_ERROR);
+        return 0;
+    }
+    return 1;
+}
+
+int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
+                             int isv2format, STACK_OF(SSL_CIPHER) **sk,
+                             STACK_OF(SSL_CIPHER) **scsvs)
+{
+    PACKET pkt;
+
+    if (!PACKET_buf_init(&pkt, bytes, len))
+        return 0;
+    return bytes_to_cipher_list(s, &pkt, sk, scsvs, isv2format, 0);
+}
+
+int bytes_to_cipher_list(SSL *s, PACKET *cipher_suites,
+                         STACK_OF(SSL_CIPHER) **skp,
+                         STACK_OF(SSL_CIPHER) **scsvs_out,
+                         int sslv2format, int fatal)
+{
+    const SSL_CIPHER *c;
+    STACK_OF(SSL_CIPHER) *sk = NULL;
+    STACK_OF(SSL_CIPHER) *scsvs = NULL;
+    int n;
+    /* 3 = SSLV2_CIPHER_LEN > TLS_CIPHER_LEN = 2. */
+    unsigned char cipher[SSLV2_CIPHER_LEN];
+
+    n = sslv2format ? SSLV2_CIPHER_LEN : TLS_CIPHER_LEN;
+
+    if (PACKET_remaining(cipher_suites) == 0) {
+        if (fatal)
+            SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_BYTES_TO_CIPHER_LIST,
+                     SSL_R_NO_CIPHERS_SPECIFIED);
+        else
+            SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_NO_CIPHERS_SPECIFIED);
+        return 0;
+    }
+
+    if (PACKET_remaining(cipher_suites) % n != 0) {
+        if (fatal)
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
+                     SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
+        else
+            SSLerr(SSL_F_BYTES_TO_CIPHER_LIST,
+                   SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
+        return 0;
+    }
+
+    sk = sk_SSL_CIPHER_new_null();
+    scsvs = sk_SSL_CIPHER_new_null();
+    if (sk == NULL || scsvs == NULL) {
+        if (fatal)
+            SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
+                     ERR_R_MALLOC_FAILURE);
+        else
+            SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    while (PACKET_copy_bytes(cipher_suites, cipher, n)) {
+        /*
+         * SSLv3 ciphers wrapped in an SSLv2-compatible ClientHello have the
+         * first byte set to zero, while true SSLv2 ciphers have a non-zero
+         * first byte. We don't support any true SSLv2 ciphers, so skip them.
+         */
+        if (sslv2format && cipher[0] != '\0')
+            continue;
+
+        /* For SSLv2-compat, ignore leading 0-byte. */
+        c = ssl_get_cipher_by_char(s, sslv2format ? &cipher[1] : cipher, 1);
+        if (c != NULL) {
+            if ((c->valid && !sk_SSL_CIPHER_push(sk, c)) ||
+                (!c->valid && !sk_SSL_CIPHER_push(scsvs, c))) {
+                if (fatal)
+                    SSLfatal(s, SSL_AD_INTERNAL_ERROR,
+                             SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
+                else
+                    SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
+                goto err;
+            }
+        }
+    }
+    if (PACKET_remaining(cipher_suites) > 0) {
+        if (fatal)
+            SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_BYTES_TO_CIPHER_LIST,
+                     SSL_R_BAD_LENGTH);
+        else
+            SSLerr(SSL_F_BYTES_TO_CIPHER_LIST, SSL_R_BAD_LENGTH);
+        goto err;
+    }
+
+    if (skp != NULL)
+        *skp = sk;
+    else
+        sk_SSL_CIPHER_free(sk);
+    if (scsvs_out != NULL)
+        *scsvs_out = scsvs;
+    else
+        sk_SSL_CIPHER_free(scsvs);
+    return 1;
+ err:
+    sk_SSL_CIPHER_free(sk);
+    sk_SSL_CIPHER_free(scsvs);
+    return 0;
+}
+
+int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
+{
+    ctx->max_early_data = max_early_data;
+
+    return 1;
+}
+
+uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
+{
+    return ctx->max_early_data;
+}
+
+int SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
+{
+    s->max_early_data = max_early_data;
+
+    return 1;
+}
+
+uint32_t SSL_get_max_early_data(const SSL *s)
+{
+    return s->max_early_data;
+}
+
+int SSL_CTX_set_recv_max_early_data(SSL_CTX *ctx, uint32_t recv_max_early_data)
+{
+    ctx->recv_max_early_data = recv_max_early_data;
+
+    return 1;
+}
+
+uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX *ctx)
+{
+    return ctx->recv_max_early_data;
+}
+
+int SSL_set_recv_max_early_data(SSL *s, uint32_t recv_max_early_data)
+{
+    s->recv_max_early_data = recv_max_early_data;
+
+    return 1;
+}
+
+uint32_t SSL_get_recv_max_early_data(const SSL *s)
+{
+    return s->recv_max_early_data;
+}
+
+__owur unsigned int ssl_get_max_send_fragment(const SSL *ssl)
+{
+    /* Return any active Max Fragment Len extension */
+    if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session))
+        return GET_MAX_FRAGMENT_LENGTH(ssl->session);
+
+    /* return current SSL connection setting */
+    return ssl->max_send_fragment;
+}
+
+__owur unsigned int ssl_get_split_send_fragment(const SSL *ssl)
+{
+    /* Return a value regarding an active Max Fragment Len extension */
+    if (ssl->session != NULL && USE_MAX_FRAGMENT_LENGTH_EXT(ssl->session)
+        && ssl->split_send_fragment > GET_MAX_FRAGMENT_LENGTH(ssl->session))
+        return GET_MAX_FRAGMENT_LENGTH(ssl->session);
+
+    /* else limit |split_send_fragment| to current |max_send_fragment| */
+    if (ssl->split_send_fragment > ssl->max_send_fragment)
+        return ssl->max_send_fragment;
+
+    /* return current SSL connection setting */
+    return ssl->split_send_fragment;
+}
+
+int SSL_stateless(SSL *s)
+{
+    int ret;
+
+    /* Ensure there is no state left over from a previous invocation */
+    if (!SSL_clear(s))
+        return 0;
+
+    ERR_clear_error();
+
+    s->s3->flags |= TLS1_FLAGS_STATELESS;
+    ret = SSL_accept(s);
+    s->s3->flags &= ~TLS1_FLAGS_STATELESS;
+
+    if (ret > 0 && s->ext.cookieok)
+        return 1;
+
+    if (s->hello_retry_request == SSL_HRR_PENDING && !ossl_statem_in_error(s))
+        return 0;
+
+    return -1;
+}
+
+void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
+{
+    ctx->pha_enabled = val;
+}
+
+void SSL_set_post_handshake_auth(SSL *ssl, int val)
+{
+    ssl->pha_enabled = val;
+}
+
+int SSL_verify_client_post_handshake(SSL *ssl)
+{
+    if (!SSL_IS_TLS13(ssl)) {
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_WRONG_SSL_VERSION);
+        return 0;
+    }
+    if (!ssl->server) {
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_NOT_SERVER);
+        return 0;
+    }
+
+    if (!SSL_is_init_finished(ssl)) {
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_STILL_IN_INIT);
+        return 0;
+    }
+
+    switch (ssl->post_handshake_auth) {
+    case SSL_PHA_NONE:
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_EXTENSION_NOT_RECEIVED);
+        return 0;
+    default:
+    case SSL_PHA_EXT_SENT:
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, ERR_R_INTERNAL_ERROR);
+        return 0;
+    case SSL_PHA_EXT_RECEIVED:
+        break;
+    case SSL_PHA_REQUEST_PENDING:
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_PENDING);
+        return 0;
+    case SSL_PHA_REQUESTED:
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_REQUEST_SENT);
+        return 0;
+    }
+
+    ssl->post_handshake_auth = SSL_PHA_REQUEST_PENDING;
+
+    /* checks verify_mode and algorithm_auth */
+    if (!send_certificate_request(ssl)) {
+        ssl->post_handshake_auth = SSL_PHA_EXT_RECEIVED; /* restore on error */
+        SSLerr(SSL_F_SSL_VERIFY_CLIENT_POST_HANDSHAKE, SSL_R_INVALID_CONFIG);
+        return 0;
+    }
+
+    ossl_statem_set_in_init(ssl, 1);
+    return 1;
+}
+
+int SSL_CTX_set_session_ticket_cb(SSL_CTX *ctx,
+                                  SSL_CTX_generate_session_ticket_fn gen_cb,
+                                  SSL_CTX_decrypt_session_ticket_fn dec_cb,
+                                  void *arg)
+{
+    ctx->generate_ticket_cb = gen_cb;
+    ctx->decrypt_ticket_cb = dec_cb;
+    ctx->ticket_cb_data = arg;
+    return 1;
+}
+
+void SSL_CTX_set_allow_early_data_cb(SSL_CTX *ctx,
+                                     SSL_allow_early_data_cb_fn cb,
+                                     void *arg)
+{
+    ctx->allow_early_data_cb = cb;
+    ctx->allow_early_data_cb_data = arg;
+}
+
+void SSL_set_allow_early_data_cb(SSL *s,
+                                 SSL_allow_early_data_cb_fn cb,
+                                 void *arg)
+{
+    s->allow_early_data_cb = cb;
+    s->allow_early_data_cb_data = arg;
+}