diff options
Diffstat (limited to 'crypto/bio/bf_buff.c')
| -rw-r--r-- | crypto/bio/bf_buff.c | 190 |
1 files changed, 74 insertions, 116 deletions
diff --git a/crypto/bio/bf_buff.c b/crypto/bio/bf_buff.c index 478fa16a07be..8e87a629b8b5 100644 --- a/crypto/bio/bf_buff.c +++ b/crypto/bio/bf_buff.c @@ -1,65 +1,16 @@ -/* crypto/bio/bf_buff.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. 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.] + * 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 */ #include <stdio.h> #include <errno.h> -#include "cryptlib.h" -#include <openssl/bio.h> +#include "bio_lcl.h" +#include "internal/cryptlib.h" static int buffer_write(BIO *h, const char *buf, int num); static int buffer_read(BIO *h, char *buf, int size); @@ -68,13 +19,17 @@ static int buffer_gets(BIO *h, char *str, int size); static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); static int buffer_new(BIO *h); static int buffer_free(BIO *data); -static long buffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); +static long buffer_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); #define DEFAULT_BUFFER_SIZE 4096 -static BIO_METHOD methods_buffer = { +static const BIO_METHOD methods_buffer = { BIO_TYPE_BUFFER, "buffer", + /* TODO: Convert to new style write function */ + bwrite_conv, buffer_write, + /* TODO: Convert to new style read function */ + bread_conv, buffer_read, buffer_puts, buffer_gets, @@ -84,40 +39,35 @@ static BIO_METHOD methods_buffer = { buffer_callback_ctrl, }; -BIO_METHOD *BIO_f_buffer(void) +const BIO_METHOD *BIO_f_buffer(void) { - return (&methods_buffer); + return &methods_buffer; } static int buffer_new(BIO *bi) { - BIO_F_BUFFER_CTX *ctx; + BIO_F_BUFFER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx)); - ctx = (BIO_F_BUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX)); if (ctx == NULL) - return (0); - ctx->ibuf = (char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); + return 0; + ctx->ibuf_size = DEFAULT_BUFFER_SIZE; + ctx->ibuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE); if (ctx->ibuf == NULL) { OPENSSL_free(ctx); - return (0); + return 0; } - ctx->obuf = (char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE); + ctx->obuf_size = DEFAULT_BUFFER_SIZE; + ctx->obuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE); if (ctx->obuf == NULL) { OPENSSL_free(ctx->ibuf); OPENSSL_free(ctx); - return (0); + return 0; } - ctx->ibuf_size = DEFAULT_BUFFER_SIZE; - ctx->obuf_size = DEFAULT_BUFFER_SIZE; - ctx->ibuf_len = 0; - ctx->ibuf_off = 0; - ctx->obuf_len = 0; - ctx->obuf_off = 0; bi->init = 1; bi->ptr = (char *)ctx; bi->flags = 0; - return (1); + return 1; } static int buffer_free(BIO *a) @@ -125,17 +75,15 @@ static int buffer_free(BIO *a) BIO_F_BUFFER_CTX *b; if (a == NULL) - return (0); + return 0; b = (BIO_F_BUFFER_CTX *)a->ptr; - if (b->ibuf != NULL) - OPENSSL_free(b->ibuf); - if (b->obuf != NULL) - OPENSSL_free(b->obuf); + OPENSSL_free(b->ibuf); + OPENSSL_free(b->obuf); OPENSSL_free(a->ptr); a->ptr = NULL; a->init = 0; a->flags = 0; - return (1); + return 1; } static int buffer_read(BIO *b, char *out, int outl) @@ -144,11 +92,11 @@ static int buffer_read(BIO *b, char *out, int outl) BIO_F_BUFFER_CTX *ctx; if (out == NULL) - return (0); + return 0; ctx = (BIO_F_BUFFER_CTX *)b->ptr; if ((ctx == NULL) || (b->next_bio == NULL)) - return (0); + return 0; num = 0; BIO_clear_retry_flags(b); @@ -163,7 +111,7 @@ static int buffer_read(BIO *b, char *out, int outl) ctx->ibuf_len -= i; num += i; if (outl == i) - return (num); + return num; outl -= i; out += i; } @@ -182,11 +130,11 @@ static int buffer_read(BIO *b, char *out, int outl) if (i < 0) return ((num > 0) ? num : i); if (i == 0) - return (num); + return num; } num += i; if (outl == i) - return (num); + return num; out += i; outl -= i; } @@ -200,7 +148,7 @@ static int buffer_read(BIO *b, char *out, int outl) if (i < 0) return ((num > 0) ? num : i); if (i == 0) - return (num); + return num; } ctx->ibuf_off = 0; ctx->ibuf_len = i; @@ -215,10 +163,10 @@ static int buffer_write(BIO *b, const char *in, int inl) BIO_F_BUFFER_CTX *ctx; if ((in == NULL) || (inl <= 0)) - return (0); + return 0; ctx = (BIO_F_BUFFER_CTX *)b->ptr; if ((ctx == NULL) || (b->next_bio == NULL)) - return (0); + return 0; BIO_clear_retry_flags(b); start: @@ -249,7 +197,7 @@ static int buffer_write(BIO *b, const char *in, int inl) if (i < 0) return ((num > 0) ? num : i); if (i == 0) - return (num); + return num; } ctx->obuf_off += i; ctx->obuf_len -= i; @@ -271,13 +219,13 @@ static int buffer_write(BIO *b, const char *in, int inl) if (i < 0) return ((num > 0) ? num : i); if (i == 0) - return (num); + return num; } num += i; in += i; inl -= i; if (inl == 0) - return (num); + return num; } /* @@ -304,7 +252,12 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) ctx->obuf_off = 0; ctx->obuf_len = 0; if (b->next_bio == NULL) - return (0); + return 0; + ret = BIO_ctrl(b->next_bio, cmd, num, ptr); + break; + case BIO_CTRL_EOF: + if (ctx->ibuf_len > 0) + return 0; ret = BIO_ctrl(b->next_bio, cmd, num, ptr); break; case BIO_CTRL_INFO: @@ -322,7 +275,7 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) ret = (long)ctx->obuf_len; if (ret == 0) { if (b->next_bio == NULL) - return (0); + return 0; ret = BIO_ctrl(b->next_bio, cmd, num, ptr); } break; @@ -330,7 +283,7 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) ret = (long)ctx->ibuf_len; if (ret == 0) { if (b->next_bio == NULL) - return (0); + return 0; ret = BIO_ctrl(b->next_bio, cmd, num, ptr); } break; @@ -339,8 +292,7 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) p1 = OPENSSL_malloc((int)num); if (p1 == NULL) goto malloc_error; - if (ctx->ibuf != NULL) - OPENSSL_free(ctx->ibuf); + OPENSSL_free(ctx->ibuf); ctx->ibuf = p1; } ctx->ibuf_off = 0; @@ -366,12 +318,12 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) p1 = ctx->ibuf; p2 = ctx->obuf; if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) { - p1 = (char *)OPENSSL_malloc((int)num); + p1 = OPENSSL_malloc((int)num); if (p1 == NULL) goto malloc_error; } if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) { - p2 = (char *)OPENSSL_malloc((int)num); + p2 = OPENSSL_malloc((int)num); if (p2 == NULL) { if (p1 != ctx->ibuf) OPENSSL_free(p1); @@ -395,7 +347,7 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) break; case BIO_C_DO_STATE_MACHINE: if (b->next_bio == NULL) - return (0); + return 0; BIO_clear_retry_flags(b); ret = BIO_ctrl(b->next_bio, cmd, num, ptr); BIO_copy_next_retry(b); @@ -403,7 +355,7 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) case BIO_CTRL_FLUSH: if (b->next_bio == NULL) - return (0); + return 0; if (ctx->obuf_len <= 0) { ret = BIO_ctrl(b->next_bio, cmd, num, ptr); break; @@ -414,19 +366,14 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) if (ctx->obuf_len > 0) { r = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]), ctx->obuf_len); -#if 0 - fprintf(stderr, "FLUSH [%3d] %3d -> %3d\n", ctx->obuf_off, - ctx->obuf_len, r); -#endif BIO_copy_next_retry(b); if (r <= 0) - return ((long)r); + return (long)r; ctx->obuf_off += r; ctx->obuf_len -= r; } else { ctx->obuf_len = 0; ctx->obuf_off = 0; - ret = 1; break; } } @@ -438,30 +385,41 @@ static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) !BIO_set_write_buffer_size(dbio, ctx->obuf_size)) ret = 0; break; + case BIO_CTRL_PEEK: + /* Ensure there's stuff in the input buffer */ + { + char fake_buf[1]; + (void)buffer_read(b, fake_buf, 0); + } + if (num > ctx->ibuf_len) + num = ctx->ibuf_len; + memcpy(ptr, &(ctx->ibuf[ctx->ibuf_off]), num); + ret = num; + break; default: if (b->next_bio == NULL) - return (0); + return 0; ret = BIO_ctrl(b->next_bio, cmd, num, ptr); break; } - return (ret); + return ret; malloc_error: BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE); - return (0); + return 0; } -static long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) +static long buffer_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) { long ret = 1; if (b->next_bio == NULL) - return (0); + return 0; switch (cmd) { default: ret = BIO_callback_ctrl(b->next_bio, cmd, fp); break; } - return (ret); + return ret; } static int buffer_gets(BIO *b, char *buf, int size) @@ -492,7 +450,7 @@ static int buffer_gets(BIO *b, char *buf, int size) ctx->ibuf_off += i; if (flag || size == 0) { *buf = '\0'; - return (num); + return num; } } else { /* read another chunk */ @@ -503,7 +461,7 @@ static int buffer_gets(BIO *b, char *buf, int size) if (i < 0) return ((num > 0) ? num : i); if (i == 0) - return (num); + return num; } ctx->ibuf_len = i; ctx->ibuf_off = 0; @@ -513,5 +471,5 @@ static int buffer_gets(BIO *b, char *buf, int size) static int buffer_puts(BIO *b, const char *str) { - return (buffer_write(b, str, strlen(str))); + return buffer_write(b, str, strlen(str)); } |