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-rw-r--r--ssl/statem/statem_local.h420
1 files changed, 420 insertions, 0 deletions
diff --git a/ssl/statem/statem_local.h b/ssl/statem/statem_local.h
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index 000000000000..e27c0c13a2bb
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+++ b/ssl/statem/statem_local.h
@@ -0,0 +1,420 @@
+/*
+ * Copyright 2015-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * 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
+ */
+
+/*****************************************************************************
+ * *
+ * The following definitions are PRIVATE to the state machine. They should *
+ * NOT be used outside of the state machine. *
+ * *
+ *****************************************************************************/
+
+/* Max message length definitions */
+
+/* The spec allows for a longer length than this, but we limit it */
+#define HELLO_VERIFY_REQUEST_MAX_LENGTH 258
+#define END_OF_EARLY_DATA_MAX_LENGTH 0
+#define SERVER_HELLO_MAX_LENGTH 20000
+#define HELLO_RETRY_REQUEST_MAX_LENGTH 20000
+#define ENCRYPTED_EXTENSIONS_MAX_LENGTH 20000
+#define SERVER_KEY_EXCH_MAX_LENGTH 102400
+#define SERVER_HELLO_DONE_MAX_LENGTH 0
+#define KEY_UPDATE_MAX_LENGTH 1
+#define CCS_MAX_LENGTH 1
+/* Max should actually be 36 but we are generous */
+#define FINISHED_MAX_LENGTH 64
+
+/* Dummy message type */
+#define SSL3_MT_DUMMY -1
+
+extern const unsigned char hrrrandom[];
+
+/* Message processing return codes */
+typedef enum {
+ /* Something bad happened */
+ MSG_PROCESS_ERROR,
+ /* We've finished reading - swap to writing */
+ MSG_PROCESS_FINISHED_READING,
+ /*
+ * We've completed the main processing of this message but there is some
+ * post processing to be done.
+ */
+ MSG_PROCESS_CONTINUE_PROCESSING,
+ /* We've finished this message - read the next message */
+ MSG_PROCESS_CONTINUE_READING
+} MSG_PROCESS_RETURN;
+
+typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
+
+int ssl3_take_mac(SSL *s);
+int check_in_list(SSL *s, uint16_t group_id, const uint16_t *groups,
+ size_t num_groups, int checkallow);
+int create_synthetic_message_hash(SSL *s, const unsigned char *hashval,
+ size_t hashlen, const unsigned char *hrr,
+ size_t hrrlen);
+int parse_ca_names(SSL *s, PACKET *pkt);
+const STACK_OF(X509_NAME) *get_ca_names(SSL *s);
+int construct_ca_names(SSL *s, const STACK_OF(X509_NAME) *ca_sk, WPACKET *pkt);
+size_t construct_key_exchange_tbs(SSL *s, unsigned char **ptbs,
+ const void *param, size_t paramlen);
+
+/*
+ * TLS/DTLS client state machine functions
+ */
+int ossl_statem_client_read_transition(SSL *s, int mt);
+WRITE_TRAN ossl_statem_client_write_transition(SSL *s);
+WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
+WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
+int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
+ confunc_f *confunc, int *mt);
+size_t ossl_statem_client_max_message_size(SSL *s);
+MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
+WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
+
+/*
+ * TLS/DTLS server state machine functions
+ */
+int ossl_statem_server_read_transition(SSL *s, int mt);
+WRITE_TRAN ossl_statem_server_write_transition(SSL *s);
+WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
+WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
+int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
+ confunc_f *confunc,int *mt);
+size_t ossl_statem_server_max_message_size(SSL *s);
+MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
+WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
+
+/* Functions for getting new message data */
+__owur int tls_get_message_header(SSL *s, int *mt);
+__owur int tls_get_message_body(SSL *s, size_t *len);
+__owur int dtls_get_message(SSL *s, int *mt, size_t *len);
+
+/* Message construction and processing functions */
+__owur int tls_process_initial_server_flight(SSL *s);
+__owur MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt);
+__owur int tls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
+__owur int dtls_construct_change_cipher_spec(SSL *s, WPACKET *pkt);
+
+__owur int tls_construct_finished(SSL *s, WPACKET *pkt);
+__owur int tls_construct_key_update(SSL *s, WPACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_key_update(SSL *s, PACKET *pkt);
+__owur WORK_STATE tls_finish_handshake(SSL *s, WORK_STATE wst, int clearbufs,
+ int stop);
+__owur WORK_STATE dtls_wait_for_dry(SSL *s);
+
+/* some client-only functions */
+__owur int tls_construct_client_hello(SSL *s, WPACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt);
+__owur int tls_process_cert_status_body(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt);
+__owur int tls_construct_cert_verify(SSL *s, WPACKET *pkt);
+__owur WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst);
+__owur int tls_construct_client_certificate(SSL *s, WPACKET *pkt);
+__owur int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey);
+__owur int tls_construct_client_key_exchange(SSL *s, WPACKET *pkt);
+__owur int tls_client_key_exchange_post_work(SSL *s);
+__owur int tls_construct_cert_status_body(SSL *s, WPACKET *pkt);
+__owur int tls_construct_cert_status(SSL *s, WPACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt);
+__owur int ssl3_check_cert_and_algorithm(SSL *s);
+#ifndef OPENSSL_NO_NEXTPROTONEG
+__owur int tls_construct_next_proto(SSL *s, WPACKET *pkt);
+#endif
+__owur MSG_PROCESS_RETURN tls_process_hello_req(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt);
+__owur int tls_construct_end_of_early_data(SSL *s, WPACKET *pkt);
+
+/* some server-only functions */
+__owur MSG_PROCESS_RETURN tls_process_client_hello(SSL *s, PACKET *pkt);
+__owur WORK_STATE tls_post_process_client_hello(SSL *s, WORK_STATE wst);
+__owur int tls_construct_server_hello(SSL *s, WPACKET *pkt);
+__owur int dtls_construct_hello_verify_request(SSL *s, WPACKET *pkt);
+__owur int tls_construct_server_certificate(SSL *s, WPACKET *pkt);
+__owur int tls_construct_server_key_exchange(SSL *s, WPACKET *pkt);
+__owur int tls_construct_certificate_request(SSL *s, WPACKET *pkt);
+__owur int tls_construct_server_done(SSL *s, WPACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_client_certificate(SSL *s, PACKET *pkt);
+__owur MSG_PROCESS_RETURN tls_process_client_key_exchange(SSL *s, PACKET *pkt);
+__owur WORK_STATE tls_post_process_client_key_exchange(SSL *s, WORK_STATE wst);
+__owur MSG_PROCESS_RETURN tls_process_cert_verify(SSL *s, PACKET *pkt);
+#ifndef OPENSSL_NO_NEXTPROTONEG
+__owur MSG_PROCESS_RETURN tls_process_next_proto(SSL *s, PACKET *pkt);
+#endif
+__owur int tls_construct_new_session_ticket(SSL *s, WPACKET *pkt);
+MSG_PROCESS_RETURN tls_process_end_of_early_data(SSL *s, PACKET *pkt);
+
+
+/* Extension processing */
+
+typedef enum ext_return_en {
+ EXT_RETURN_FAIL,
+ EXT_RETURN_SENT,
+ EXT_RETURN_NOT_SENT
+} EXT_RETURN;
+
+__owur int tls_validate_all_contexts(SSL *s, unsigned int thisctx,
+ RAW_EXTENSION *exts);
+__owur int extension_is_relevant(SSL *s, unsigned int extctx,
+ unsigned int thisctx);
+__owur int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
+ RAW_EXTENSION **res, size_t *len, int init);
+__owur int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
+ RAW_EXTENSION *exts, X509 *x, size_t chainidx);
+__owur int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts,
+ X509 *x, size_t chainidx, int fin);
+__owur int should_add_extension(SSL *s, unsigned int extctx,
+ unsigned int thisctx, int max_version);
+__owur int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+
+__owur int tls_psk_do_binder(SSL *s, const EVP_MD *md,
+ const unsigned char *msgstart,
+ size_t binderoffset, const unsigned char *binderin,
+ unsigned char *binderout,
+ SSL_SESSION *sess, int sign, int external);
+
+/* Server Extension processing */
+int tls_parse_ctos_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_server_name(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_SRP
+int tls_parse_ctos_srp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+int tls_parse_ctos_early_data(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_EC
+int tls_parse_ctos_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_supported_groups(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidxl);
+#endif
+int tls_parse_ctos_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_sig_algs_cert(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_sig_algs(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_OCSP
+int tls_parse_ctos_status_request(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_NEXTPROTONEG
+int tls_parse_ctos_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+int tls_parse_ctos_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_SRTP
+int tls_parse_ctos_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+int tls_parse_ctos_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_ctos_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_ctos_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_ctos_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_ctos_psk_kex_modes(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_ctos_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_ctos_post_handshake_auth(SSL *, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+
+EXT_RETURN tls_construct_stoc_renegotiate(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_server_name(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_early_data(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_maxfragmentlen(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_EC
+EXT_RETURN tls_construct_stoc_ec_pt_formats(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+EXT_RETURN tls_construct_stoc_supported_groups(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_session_ticket(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_OCSP
+EXT_RETURN tls_construct_stoc_status_request(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_NEXTPROTONEG
+EXT_RETURN tls_construct_stoc_next_proto_neg(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+EXT_RETURN tls_construct_stoc_alpn(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_SRTP
+EXT_RETURN tls_construct_stoc_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+EXT_RETURN tls_construct_stoc_etm(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_stoc_ems(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_stoc_supported_versions(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_key_share(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_cookie(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+/*
+ * Not in public headers as this is not an official extension. Only used when
+ * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set.
+ */
+#define TLSEXT_TYPE_cryptopro_bug 0xfde8
+EXT_RETURN tls_construct_stoc_cryptopro_bug(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_stoc_psk(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+
+/* Client Extension processing */
+EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_SRP
+EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_EC
+EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_OCSP
+EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_NEXTPROTONEG
+EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_SRTP
+EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_CT
+EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
+ unsigned int context, X509 *x,
+ size_t chainidx);
+EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+
+int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_EC
+int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#ifndef OPENSSL_NO_OCSP
+int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_CT
+int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+#ifndef OPENSSL_NO_NEXTPROTONEG
+int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#ifndef OPENSSL_NO_SRTP
+int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+#endif
+int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
+ X509 *x, size_t chainidx);
+int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
+ size_t chainidx);
+
+int tls_handle_alpn(SSL *s);
+
+int tls13_save_handshake_digest_for_pha(SSL *s);
+int tls13_restore_handshake_digest_for_pha(SSL *s);