X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=ssl%2Fs3_clnt.c;h=5cf47d21ff7c59662144c30f8fcbb2e2e484f19b;hp=ace0838106883d717c631aea9d6fa5f1f7552f75;hb=8723588e1b9a13511ffd7b806c73293120bc1f44;hpb=e481f9b90b164fd1053015d1c4e0a0d92076d7a8 diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c index ace0838106..5cf47d21ff 100644 --- a/ssl/s3_clnt.c +++ b/ssl/s3_clnt.c @@ -165,13 +165,22 @@ static int ssl_set_version(SSL *s); static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); -static int ssl3_check_finished(SSL *s); +#if 0 +/* + * Temporarily disabled during development of new state machine code. + * TODO: Clean me up + */ +static int ssl3_check_change(SSL *s); +#endif static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, - unsigned char *p, - int (*put_cb) (const SSL_CIPHER *, - unsigned char *)); + unsigned char *p); +#if 0 +/* + * Temporarily disabled during development of new state machine code. + * TODO: Clean me up + */ int ssl3_connect(SSL *s) { BUF_MEM *buf = NULL; @@ -276,7 +285,6 @@ int ssl3_connect(SSL *s) s->state = SSL3_ST_CW_CLNT_HELLO_A; s->ctx->stats.sess_connect++; s->init_num = 0; - s->s3->flags &= ~SSL3_FLAGS_CCS_OK; /* * Should have been reset by ssl3_get_finished, too. */ @@ -306,7 +314,7 @@ int ssl3_connect(SSL *s) goto end; if (s->hit) { - s->state = SSL3_ST_CR_FINISHED_A; + s->state = SSL3_ST_CR_CHANGE_A; if (s->tlsext_ticket_expected) { /* receive renewed session ticket */ s->state = SSL3_ST_CR_SESSION_TICKET_A; @@ -319,22 +327,20 @@ int ssl3_connect(SSL *s) case SSL3_ST_CR_CERT_A: case SSL3_ST_CR_CERT_B: /* Noop (ret = 0) for everything but EAP-FAST. */ - ret = ssl3_check_finished(s); + ret = ssl3_check_change(s); if (ret < 0) goto end; if (ret == 1) { s->hit = 1; - s->state = SSL3_ST_CR_FINISHED_A; + s->state = SSL3_ST_CR_CHANGE_A; s->init_num = 0; break; } /* Check if it is anon DH/ECDH, SRP auth */ /* or PSK */ - if (! - (s->s3->tmp. - new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) -&& !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { + if (!(s->s3->tmp.new_cipher->algorithm_auth & + (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { ret = ssl3_get_server_certificate(s); if (ret <= 0) goto end; @@ -384,16 +390,7 @@ int ssl3_connect(SSL *s) ret = ssl3_get_server_done(s); if (ret <= 0) goto end; -#ifndef OPENSSL_NO_SRP - if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { - if ((ret = SRP_Calc_A_param(s)) <= 0) { - SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - s->state = SSL_ST_ERR; - goto end; - } - } -#endif + if (s->s3->tmp.cert_req) s->state = SSL3_ST_CW_CERT_A; else @@ -518,15 +515,8 @@ int ssl3_connect(SSL *s) goto end; s->state = SSL3_ST_CW_FLUSH; - /* clear flags */ - s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; if (s->hit) { s->s3->tmp.next_state = SSL_ST_OK; - if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { - s->state = SSL_ST_OK; - s->s3->flags |= SSL3_FLAGS_POP_BUFFER; - s->s3->delay_buf_pop_ret = 0; - } } else { /* * Allow NewSessionTicket if ticket expected @@ -534,7 +524,7 @@ int ssl3_connect(SSL *s) if (s->tlsext_ticket_expected) s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; else - s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; + s->s3->tmp.next_state = SSL3_ST_CR_CHANGE_A; } s->init_num = 0; break; @@ -544,7 +534,7 @@ int ssl3_connect(SSL *s) ret = ssl3_get_new_session_ticket(s); if (ret <= 0) goto end; - s->state = SSL3_ST_CR_FINISHED_A; + s->state = SSL3_ST_CR_CHANGE_A; s->init_num = 0; break; @@ -557,10 +547,19 @@ int ssl3_connect(SSL *s) s->init_num = 0; break; + case SSL3_ST_CR_CHANGE_A: + case SSL3_ST_CR_CHANGE_B: + ret = ssl3_get_change_cipher_spec(s, SSL3_ST_CR_CHANGE_A, + SSL3_ST_CR_CHANGE_B); + if (ret <= 0) + goto end; + + s->state = SSL3_ST_CR_FINISHED_A; + s->init_num = 0; + break; + case SSL3_ST_CR_FINISHED_A: case SSL3_ST_CR_FINISHED_B: - if (!s->s3->change_cipher_spec) - s->s3->flags |= SSL3_FLAGS_CCS_OK; ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, SSL3_ST_CR_FINISHED_B); if (ret <= 0) @@ -589,13 +588,8 @@ int ssl3_connect(SSL *s) BUF_MEM_free(s->init_buf); s->init_buf = NULL; - /* - * If we are not 'joining' the last two packets, remove the - * buffering now - */ - if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) - ssl_free_wbio_buffer(s); - /* else do it later in ssl3_write */ + /* remove the buffering */ + ssl_free_wbio_buffer(s); s->init_num = 0; s->renegotiate = 0; @@ -648,6 +642,7 @@ int ssl3_connect(SSL *s) return (ret); } +#endif /* End temp disabled ssl3_connect */ /* * Work out what version we should be using for the initial ClientHello if * the version is currently set to (D)TLS_ANY_VERSION. @@ -748,6 +743,23 @@ static int ssl_set_version(SSL *s) } int ssl3_client_hello(SSL *s) +{ + if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { + if(tls_construct_client_hello(s) == 0) + goto err; + + s->state = SSL3_ST_CW_CLNT_HELLO_B; + } + + /* SSL3_ST_CW_CLNT_HELLO_B */ + return ssl_do_write(s); + err: + s->state = SSL_ST_ERR; + return -1; + +} + +int tls_construct_client_hello(SSL *s) { unsigned char *buf; unsigned char *p, *d; @@ -758,197 +770,185 @@ int ssl3_client_hello(SSL *s) int j; SSL_COMP *comp; #endif + SSL_SESSION *sess = s->session; buf = (unsigned char *)s->init_buf->data; - if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { - SSL_SESSION *sess = s->session; - - /* Work out what SSL/TLS/DTLS version to use */ - if (ssl_set_version(s) == 0) - goto err; - - if ((sess == NULL) || (sess->ssl_version != s->version) || - /* - * In the case of EAP-FAST, we can have a pre-shared - * "ticket" without a session ID. - */ - (!sess->session_id_length && !sess->tlsext_tick) || - (sess->not_resumable)) { - if (!ssl_get_new_session(s, 0)) - goto err; - } - /* else use the pre-loaded session */ - p = s->s3->client_random; + /* Work out what SSL/TLS/DTLS version to use */ + if (ssl_set_version(s) == 0) + goto err; + if ((sess == NULL) || (sess->ssl_version != s->version) || /* - * for DTLS if client_random is initialized, reuse it, we are - * required to use same upon reply to HelloVerify + * In the case of EAP-FAST, we can have a pre-shared + * "ticket" without a session ID. */ - if (SSL_IS_DTLS(s)) { - size_t idx; - i = 1; - for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { - if (p[idx]) { - i = 0; - break; - } - } - } else - i = 1; - - if (i && ssl_fill_hello_random(s, 0, p, - sizeof(s->s3->client_random)) <= 0) + (!sess->session_id_length && !sess->tlsext_tick) || + (sess->not_resumable)) { + if (!ssl_get_new_session(s, 0)) goto err; + } + /* else use the pre-loaded session */ - /* Do the message type and length last */ - d = p = ssl_handshake_start(s); - - /*- - * version indicates the negotiated version: for example from - * an SSLv2/v3 compatible client hello). The client_version - * field is the maximum version we permit and it is also - * used in RSA encrypted premaster secrets. Some servers can - * choke if we initially report a higher version then - * renegotiate to a lower one in the premaster secret. This - * didn't happen with TLS 1.0 as most servers supported it - * but it can with TLS 1.1 or later if the server only supports - * 1.0. - * - * Possible scenario with previous logic: - * 1. Client hello indicates TLS 1.2 - * 2. Server hello says TLS 1.0 - * 3. RSA encrypted premaster secret uses 1.2. - * 4. Handhaked proceeds using TLS 1.0. - * 5. Server sends hello request to renegotiate. - * 6. Client hello indicates TLS v1.0 as we now - * know that is maximum server supports. - * 7. Server chokes on RSA encrypted premaster secret - * containing version 1.0. - * - * For interoperability it should be OK to always use the - * maximum version we support in client hello and then rely - * on the checking of version to ensure the servers isn't - * being inconsistent: for example initially negotiating with - * TLS 1.0 and renegotiating with TLS 1.2. We do this by using - * client_version in client hello and not resetting it to - * the negotiated version. - */ - *(p++) = s->client_version >> 8; - *(p++) = s->client_version & 0xff; - - /* Random stuff */ - memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); - p += SSL3_RANDOM_SIZE; + p = s->s3->client_random; - /* Session ID */ - if (s->new_session) - i = 0; - else - i = s->session->session_id_length; - *(p++) = i; - if (i != 0) { - if (i > (int)sizeof(s->session->session_id)) { - SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - goto err; + /* + * for DTLS if client_random is initialized, reuse it, we are + * required to use same upon reply to HelloVerify + */ + if (SSL_IS_DTLS(s)) { + size_t idx; + i = 1; + for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { + if (p[idx]) { + i = 0; + break; } - memcpy(p, s->session->session_id, i); - p += i; } + } else + i = 1; - /* cookie stuff for DTLS */ - if (SSL_IS_DTLS(s)) { - if (s->d1->cookie_len > sizeof(s->d1->cookie)) { - SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - goto err; - } - *(p++) = s->d1->cookie_len; - memcpy(p, s->d1->cookie, s->d1->cookie_len); - p += s->d1->cookie_len; + if (i && ssl_fill_hello_random(s, 0, p, + sizeof(s->s3->client_random)) <= 0) + goto err; + + /* Do the message type and length last */ + d = p = ssl_handshake_start(s); + + /*- + * version indicates the negotiated version: for example from + * an SSLv2/v3 compatible client hello). The client_version + * field is the maximum version we permit and it is also + * used in RSA encrypted premaster secrets. Some servers can + * choke if we initially report a higher version then + * renegotiate to a lower one in the premaster secret. This + * didn't happen with TLS 1.0 as most servers supported it + * but it can with TLS 1.1 or later if the server only supports + * 1.0. + * + * Possible scenario with previous logic: + * 1. Client hello indicates TLS 1.2 + * 2. Server hello says TLS 1.0 + * 3. RSA encrypted premaster secret uses 1.2. + * 4. Handhaked proceeds using TLS 1.0. + * 5. Server sends hello request to renegotiate. + * 6. Client hello indicates TLS v1.0 as we now + * know that is maximum server supports. + * 7. Server chokes on RSA encrypted premaster secret + * containing version 1.0. + * + * For interoperability it should be OK to always use the + * maximum version we support in client hello and then rely + * on the checking of version to ensure the servers isn't + * being inconsistent: for example initially negotiating with + * TLS 1.0 and renegotiating with TLS 1.2. We do this by using + * client_version in client hello and not resetting it to + * the negotiated version. + */ + *(p++) = s->client_version >> 8; + *(p++) = s->client_version & 0xff; + + /* Random stuff */ + memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); + p += SSL3_RANDOM_SIZE; + + /* Session ID */ + if (s->new_session) + i = 0; + else + i = s->session->session_id_length; + *(p++) = i; + if (i != 0) { + if (i > (int)sizeof(s->session->session_id)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; } + memcpy(p, s->session->session_id, i); + p += i; + } - /* Ciphers supported */ - i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); - if (i == 0) { - SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); + /* cookie stuff for DTLS */ + if (SSL_IS_DTLS(s)) { + if (s->d1->cookie_len > sizeof(s->d1->cookie)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); goto err; } + *(p++) = s->d1->cookie_len; + memcpy(p, s->d1->cookie, s->d1->cookie_len); + p += s->d1->cookie_len; + } + + /* Ciphers supported */ + i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); + if (i == 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); + goto err; + } #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH - /* - * Some servers hang if client hello > 256 bytes as hack workaround - * chop number of supported ciphers to keep it well below this if we - * use TLS v1.2 - */ - if (TLS1_get_version(s) >= TLS1_2_VERSION - && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) - i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; + /* + * Some servers hang if client hello > 256 bytes as hack workaround + * chop number of supported ciphers to keep it well below this if we + * use TLS v1.2 + */ + if (TLS1_get_version(s) >= TLS1_2_VERSION + && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) + i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; #endif - s2n(i, p); - p += i; + s2n(i, p); + p += i; - /* COMPRESSION */ + /* COMPRESSION */ #ifdef OPENSSL_NO_COMP - *(p++) = 1; + *(p++) = 1; #else - if (!ssl_allow_compression(s) || !s->ctx->comp_methods) - j = 0; - else - j = sk_SSL_COMP_num(s->ctx->comp_methods); - *(p++) = 1 + j; - for (i = 0; i < j; i++) { - comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); - *(p++) = comp->id; - } + if (!ssl_allow_compression(s) || !s->ctx->comp_methods) + j = 0; + else + j = sk_SSL_COMP_num(s->ctx->comp_methods); + *(p++) = 1 + j; + for (i = 0; i < j; i++) { + comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); + *(p++) = comp->id; + } #endif - *(p++) = 0; /* Add the NULL method */ + *(p++) = 0; /* Add the NULL method */ - /* TLS extensions */ - if (ssl_prepare_clienthello_tlsext(s) <= 0) { - SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); - goto err; - } - if ((p = - ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, - &al)) == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, al); - SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - goto err; - } + /* TLS extensions */ + if (ssl_prepare_clienthello_tlsext(s) <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); + goto err; + } + if ((p = + ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, + &al)) == NULL) { + ssl3_send_alert(s, SSL3_AL_FATAL, al); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; + } - l = p - d; - if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); - goto err; - } - s->state = SSL3_ST_CW_CLNT_HELLO_B; + l = p - d; + if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); + goto err; } - /* SSL3_ST_CW_CLNT_HELLO_B */ - return ssl_do_write(s); + return 1; err: - s->state = SSL_ST_ERR; - return (-1); + statem_set_error(s); + return 0; } int ssl3_get_server_hello(SSL *s) { - STACK_OF(SSL_CIPHER) *sk; - const SSL_CIPHER *c; - unsigned char *p, *d; - int i, al = SSL_AD_INTERNAL_ERROR, ok; - unsigned int j; + int ok, al; long n; -#ifndef OPENSSL_NO_COMP - SSL_COMP *comp; -#endif /* * Hello verify request and/or server hello version may not match so set * first packet if we're negotiating version. */ - if (SSL_IS_DTLS(s)) - s->first_packet = 1; + s->first_packet = 1; n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_HELLO_A, @@ -957,8 +957,8 @@ int ssl3_get_server_hello(SSL *s) if (!ok) return ((int)n); + s->first_packet = 0; if (SSL_IS_DTLS(s)) { - s->first_packet = 0; if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { if (s->d1->send_cookie == 0) { s->s3->tmp.reuse_message = 1; @@ -978,10 +978,40 @@ int ssl3_get_server_hello(SSL *s) goto f_err; } - d = p = (unsigned char *)s->init_msg; + return tls_process_server_hello(s, (unsigned long)n); + f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + s->state = SSL_ST_ERR; + return (-1); +} + +enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, unsigned long n) +{ + STACK_OF(SSL_CIPHER) *sk; + const SSL_CIPHER *c; + PACKET pkt, session_id; + size_t session_id_len; + unsigned char *cipherchars; + int i, al = SSL_AD_INTERNAL_ERROR; + unsigned int compression; +#ifndef OPENSSL_NO_COMP + SSL_COMP *comp; +#endif + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); + goto f_err; + } if (s->method->version == TLS_ANY_VERSION) { - int sversion = (p[0] << 8) | p[1]; + unsigned int sversion; + + if (!PACKET_get_net_2(&pkt, &sversion)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + goto f_err; + } #if TLS_MAX_VERSION != TLS1_2_VERSION #error Code needs updating for new TLS version @@ -989,7 +1019,7 @@ int ssl3_get_server_hello(SSL *s) #ifndef OPENSSL_NO_SSL3 if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) { if (FIPS_mode()) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); al = SSL_AD_PROTOCOL_VERSION; goto f_err; @@ -1006,25 +1036,33 @@ int ssl3_get_server_hello(SSL *s) !(s->options & SSL_OP_NO_TLSv1_2)) { s->method = TLSv1_2_client_method(); } else { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); al = SSL_AD_PROTOCOL_VERSION; goto f_err; } s->session->ssl_version = s->version = s->method->version; if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); al = SSL_AD_PROTOCOL_VERSION; goto f_err; } } else if (s->method->version == DTLS_ANY_VERSION) { /* Work out correct protocol version to use */ - int hversion = (p[0] << 8) | p[1]; - int options = s->options; + unsigned int hversion; + int options; + + if (!PACKET_get_net_2(&pkt, &hversion)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + goto f_err; + } + + options = s->options; if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) s->method = DTLSv1_2_client_method(); else if (tls1_suiteb(s)) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); s->version = hversion; al = SSL_AD_PROTOCOL_VERSION; @@ -1032,33 +1070,56 @@ int ssl3_get_server_hello(SSL *s) } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) s->method = DTLSv1_client_method(); else { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); s->version = hversion; al = SSL_AD_PROTOCOL_VERSION; goto f_err; } - s->version = s->method->version; - } else if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); - s->version = (s->version & 0xff00) | p[1]; - al = SSL_AD_PROTOCOL_VERSION; - goto f_err; + s->session->ssl_version = s->version = s->method->version; + } else { + unsigned char *vers; + + if (!PACKET_get_bytes(&pkt, &vers, 2)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + goto f_err; + } + if ((vers[0] != (s->version >> 8)) + || (vers[1] != (s->version & 0xff))) { + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); + s->version = (s->version & 0xff00) | vers[1]; + al = SSL_AD_PROTOCOL_VERSION; + goto f_err; + } } - p += 2; /* load the server hello data */ /* load the server random */ - memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); - p += SSL3_RANDOM_SIZE; + if (!PACKET_copy_bytes(&pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + goto f_err; + } s->hit = 0; - /* get the session-id */ - j = *(p++); - - if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { + /* Get the session-id. */ + if (!PACKET_get_length_prefixed_1(&pkt, &session_id)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + goto f_err; + } + session_id_len = PACKET_remaining(&session_id); + if (session_id_len > sizeof s->session->session_id + || session_id_len > SSL3_SESSION_ID_SIZE) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); + goto f_err; + } + + if (!PACKET_get_bytes(&pkt, &cipherchars, TLS_CIPHER_LEN)) { + SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + al = SSL_AD_DECODE_ERROR; goto f_err; } @@ -1083,21 +1144,22 @@ int ssl3_get_server_hello(SSL *s) NULL, &pref_cipher, s->tls_session_secret_cb_arg)) { s->session->cipher = pref_cipher ? - pref_cipher : ssl_get_cipher_by_char(s, p + j); + pref_cipher : ssl_get_cipher_by_char(s, cipherchars); } else { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); al = SSL_AD_INTERNAL_ERROR; goto f_err; } } - if (j != 0 && j == s->session->session_id_length - && memcmp(p, s->session->session_id, j) == 0) { + if (session_id_len != 0 && session_id_len == s->session->session_id_length + && memcmp(PACKET_data(&session_id), s->session->session_id, + session_id_len) == 0) { if (s->sid_ctx_length != s->session->sid_ctx_length || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { /* actually a client application bug */ al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); goto f_err; } @@ -1115,15 +1177,18 @@ int ssl3_get_server_hello(SSL *s) goto f_err; } } - s->session->session_id_length = j; - memcpy(s->session->session_id, p, j); /* j could be 0 */ + + s->session->session_id_length = session_id_len; + /* session_id_len could be 0 */ + memcpy(s->session->session_id, PACKET_data(&session_id), + session_id_len); } - p += j; - c = ssl_get_cipher_by_char(s, p); + + c = ssl_get_cipher_by_char(s, cipherchars); if (c == NULL) { /* unknown cipher */ al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); goto f_err; } /* Set version disabled mask now we know version */ @@ -1137,17 +1202,16 @@ int ssl3_get_server_hello(SSL *s) */ if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); goto f_err; } - p += ssl_put_cipher_by_char(s, NULL, NULL); sk = ssl_get_ciphers_by_id(s); i = sk_SSL_CIPHER_find(sk, c); if (i < 0) { /* we did not say we would use this cipher */ al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); goto f_err; } @@ -1160,7 +1224,7 @@ int ssl3_get_server_hello(SSL *s) s->session->cipher_id = s->session->cipher->id; if (s->hit && (s->session->cipher_id != c->id)) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); goto f_err; } @@ -1169,14 +1233,19 @@ int ssl3_get_server_hello(SSL *s) * Don't digest cached records if no sigalgs: we may need them for client * authentication. */ - if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s)) + if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0)) goto f_err; /* lets get the compression algorithm */ /* COMPRESSION */ + if (!PACKET_get_1(&pkt, &compression)) { + SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); + al = SSL_AD_DECODE_ERROR; + goto f_err; + } #ifdef OPENSSL_NO_COMP - if (*(p++) != 0) { + if (compression != 0) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); goto f_err; } @@ -1185,29 +1254,29 @@ int ssl3_get_server_hello(SSL *s) * using compression. */ if (s->session->compress_meth != 0) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); goto f_err; } #else - j = *(p++); - if (s->hit && j != s->session->compress_meth) { + if (s->hit && compression != s->session->compress_meth) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); goto f_err; } - if (j == 0) + if (compression == 0) comp = NULL; else if (!ssl_allow_compression(s)) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); goto f_err; - } else - comp = ssl3_comp_find(s->ctx->comp_methods, j); + } else { + comp = ssl3_comp_find(s->ctx->comp_methods, compression); + } - if ((j != 0) && (comp == NULL)) { + if (compression != 0 && comp == NULL) { al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); goto f_err; } else { @@ -1216,36 +1285,56 @@ int ssl3_get_server_hello(SSL *s) #endif /* TLS extensions */ - if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) { - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); + if (!ssl_parse_serverhello_tlsext(s, &pkt)) { + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); goto err; } - if (p != (d + n)) { + if (PACKET_remaining(&pkt) != 0) { /* wrong packet length */ al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); + SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); goto f_err; } - return (1); +#ifndef OPENSSL_NO_SCTP + if (SSL_IS_DTLS(s) && s->hit) { + unsigned char sctpauthkey[64]; + char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; + + /* + * Add new shared key for SCTP-Auth, will be ignored if + * no SCTP used. + */ + snprintf((char *)labelbuffer, + sizeof(DTLS1_SCTP_AUTH_LABEL), + DTLS1_SCTP_AUTH_LABEL); + + if (SSL_export_keying_material(s, sctpauthkey, + sizeof(sctpauthkey), + labelbuffer, + sizeof(labelbuffer), NULL, 0, + 0) <= 0) + goto err; + + BIO_ctrl(SSL_get_wbio(s), + BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, + sizeof(sctpauthkey), sctpauthkey); + } +#endif + + return MSG_PROCESS_CONTINUE_READING; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: - s->state = SSL_ST_ERR; - return (-1); + statem_set_error(s); + return MSG_PROCESS_ERROR; } int ssl3_get_server_certificate(SSL *s) { - int al, i, ok, ret = -1, exp_idx; - unsigned long n, nc, llen, l; - X509 *x = NULL; - const unsigned char *q, *p; - unsigned char *d; - STACK_OF(X509) *sk = NULL; - SESS_CERT *sc; - EVP_PKEY *pkey = NULL; + long n; + int ok, al; n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_A, @@ -1265,72 +1354,85 @@ int ssl3_get_server_certificate(SSL *s) SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); goto f_err; } - p = d = (unsigned char *)s->init_msg; + + return tls_process_server_certificate(s, (unsigned long)n); + f_err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); + s->state = SSL_ST_ERR; + return -1; +} + +enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, unsigned long n) +{ + int al, i, ret = MSG_PROCESS_ERROR, exp_idx; + unsigned long cert_list_len, cert_len; + X509 *x = NULL; + unsigned char *certstart, *certbytes; + STACK_OF(X509) *sk = NULL; + EVP_PKEY *pkey = NULL; + PACKET pkt; + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); + goto f_err; + } if ((sk = sk_X509_new_null()) == NULL) { - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); goto err; } - n2l3(p, llen); - if (llen + 3 != n) { + if (!PACKET_get_net_3(&pkt, &cert_list_len) + || PACKET_remaining(&pkt) != cert_list_len) { al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); goto f_err; } - for (nc = 0; nc < llen;) { - n2l3(p, l); - if ((l + nc + 3) > llen) { + while (PACKET_remaining(&pkt)) { + if (!PACKET_get_net_3(&pkt, &cert_len) + || !PACKET_get_bytes(&pkt, &certbytes, cert_len)) { al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_CERT_LENGTH_MISMATCH); goto f_err; } - q = p; - x = d2i_X509(NULL, &q, l); + certstart = certbytes; + x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); if (x == NULL) { al = SSL_AD_BAD_CERTIFICATE; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); goto f_err; } - if (q != (p + l)) { + if (certbytes != (certstart + cert_len)) { al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_CERT_LENGTH_MISMATCH); goto f_err; } if (!sk_X509_push(sk, x)) { - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); goto err; } x = NULL; - nc += l + 3; - p = q; } i = ssl_verify_cert_chain(s, sk); if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { al = ssl_verify_alarm_type(s->verify_result); - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_CERTIFICATE_VERIFY_FAILED); goto f_err; } ERR_clear_error(); /* but we keep s->verify_result */ if (i > 1) { - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i); + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); al = SSL_AD_HANDSHAKE_FAILURE; goto f_err; } - sc = ssl_sess_cert_new(); - if (sc == NULL) - goto err; - - ssl_sess_cert_free(s->session->sess_cert); - s->session->sess_cert = sc; - - sc->cert_chain = sk; + s->session->peer_chain = sk; /* * Inconsistency alert: cert_chain does include the peer's certificate, * which we don't include in s3_srvr.c @@ -1346,7 +1448,7 @@ int ssl3_get_server_certificate(SSL *s) if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { x = NULL; al = SSL3_AL_FATAL; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); goto f_err; } @@ -1355,7 +1457,7 @@ int ssl3_get_server_certificate(SSL *s) if (i < 0) { x = NULL; al = SSL3_AL_FATAL; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_UNKNOWN_CERTIFICATE_TYPE); goto f_err; } @@ -1364,66 +1466,37 @@ int ssl3_get_server_certificate(SSL *s) if (exp_idx >= 0 && i != exp_idx) { x = NULL; al = SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, + SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_WRONG_CERTIFICATE_TYPE); goto f_err; } - sc->peer_cert_type = i; - CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); - /* - * Why would the following ever happen? We just created sc a couple - * of lines ago. - */ - X509_free(sc->peer_pkeys[i].x509); - sc->peer_pkeys[i].x509 = x; - sc->peer_key = &(sc->peer_pkeys[i]); + s->session->peer_type = i; X509_free(s->session->peer); - CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); + X509_up_ref(x); s->session->peer = x; s->session->verify_result = s->verify_result; x = NULL; - ret = 1; + ret = MSG_PROCESS_CONTINUE_READING; goto done; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: - s->state = SSL_ST_ERR; + statem_set_error(s); done: EVP_PKEY_free(pkey); X509_free(x); sk_X509_pop_free(sk, X509_free); - return (ret); + return ret; } int ssl3_get_key_exchange(SSL *s) { -#ifndef OPENSSL_NO_RSA - unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; -#endif - EVP_MD_CTX md_ctx; - unsigned char *param, *p; - int al, j, ok; - long i, param_len, n, alg_k, alg_a; - EVP_PKEY *pkey = NULL; - const EVP_MD *md = NULL; -#ifndef OPENSSL_NO_RSA - RSA *rsa = NULL; -#endif -#ifndef OPENSSL_NO_DH - DH *dh = NULL; -#endif -#ifndef OPENSSL_NO_EC - EC_KEY *ecdh = NULL; - BN_CTX *bn_ctx = NULL; - EC_POINT *srvr_ecpoint = NULL; - int curve_nid = 0; - int encoded_pt_len = 0; -#endif - - EVP_MD_CTX_init(&md_ctx); + long n; + int ok; + long alg_k; /* * use same message size as in ssl3_get_certificate_request() as @@ -1437,68 +1510,85 @@ int ssl3_get_key_exchange(SSL *s) return ((int)n); alg_k = s->s3->tmp.new_cipher->algorithm_mkey; - + if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { /* * Can't skip server key exchange if this is an ephemeral * ciphersuite. */ - if (alg_k & (SSL_kDHE | SSL_kECDHE)) { + if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); - al = SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } -#ifndef OPENSSL_NO_PSK - /* - * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no - * identity hint is sent. Set session->sess_cert anyway to avoid - * problems later. - */ - if (alg_k & SSL_kPSK) { - s->session->sess_cert = ssl_sess_cert_new(); - OPENSSL_free(s->ctx->psk_identity_hint); - s->ctx->psk_identity_hint = NULL; + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); + return -1; } -#endif + s->s3->tmp.reuse_message = 1; - return (1); + return 1; } - param = p = (unsigned char *)s->init_msg; - if (s->session->sess_cert != NULL) { + return tls_process_key_exchange(s, (unsigned long)n); +} + +enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, unsigned long n) +{ #ifndef OPENSSL_NO_RSA - RSA_free(s->session->sess_cert->peer_rsa_tmp); - s->session->sess_cert->peer_rsa_tmp = NULL; + unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; #endif -#ifndef OPENSSL_NO_DH - DH_free(s->session->sess_cert->peer_dh_tmp); - s->session->sess_cert->peer_dh_tmp = NULL; + EVP_MD_CTX md_ctx; + int al, j, verify_ret; + long alg_k, alg_a; + EVP_PKEY *pkey = NULL; + const EVP_MD *md = NULL; +#ifndef OPENSSL_NO_RSA + RSA *rsa = NULL; +#endif +#ifndef OPENSSL_NO_DH + DH *dh = NULL; #endif #ifndef OPENSSL_NO_EC - EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); - s->session->sess_cert->peer_ecdh_tmp = NULL; + EC_KEY *ecdh = NULL; + BN_CTX *bn_ctx = NULL; + EC_POINT *srvr_ecpoint = NULL; + int curve_nid = 0; #endif - } else { - s->session->sess_cert = ssl_sess_cert_new(); + PACKET pkt, save_param_start, signature; + + EVP_MD_CTX_init(&md_ctx); + + alg_k = s->s3->tmp.new_cipher->algorithm_mkey; + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + al = SSL_AD_INTERNAL_ERROR; + goto f_err; } + save_param_start = pkt; - /* Total length of the parameters including the length prefix */ - param_len = 0; +#ifndef OPENSSL_NO_RSA + RSA_free(s->s3->peer_rsa_tmp); + s->s3->peer_rsa_tmp = NULL; +#endif +#ifndef OPENSSL_NO_DH + DH_free(s->s3->peer_dh_tmp); + s->s3->peer_dh_tmp = NULL; +#endif +#ifndef OPENSSL_NO_EC + EC_KEY_free(s->s3->peer_ecdh_tmp); + s->s3->peer_ecdh_tmp = NULL; +#endif alg_a = s->s3->tmp.new_cipher->algorithm_auth; al = SSL_AD_DECODE_ERROR; #ifndef OPENSSL_NO_PSK - if (alg_k & SSL_kPSK) { - char tmp_id_hint[PSK_MAX_IDENTITY_LEN + 1]; - - param_len = 2; - if (param_len > n) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); + /* PSK ciphersuites are preceded by an identity hint */ + if (alg_k & SSL_PSK) { + PACKET psk_identity_hint; + if (!PACKET_get_length_prefixed_2(&pkt, &psk_identity_hint)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); goto f_err; } - n2s(p, i); /* * Store PSK identity hint for later use, hint is used in @@ -1506,328 +1596,173 @@ int ssl3_get_key_exchange(SSL *s) * a PSK identity hint can be as long as the maximum length of a PSK * identity. */ - if (i > PSK_MAX_IDENTITY_LEN) { + if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); - goto f_err; - } - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, - SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); goto f_err; } - param_len += i; - /* - * If received PSK identity hint contains NULL characters, the hint - * is truncated from the first NULL. p may not be ending with NULL, - * so create a NULL-terminated string. - */ - memcpy(tmp_id_hint, p, i); - memset(tmp_id_hint + i, 0, PSK_MAX_IDENTITY_LEN + 1 - i); - OPENSSL_free(s->ctx->psk_identity_hint); - s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); - if (s->ctx->psk_identity_hint == NULL) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + if (!PACKET_strndup(&psk_identity_hint, + &s->session->psk_identity_hint)) { + al = SSL_AD_INTERNAL_ERROR; goto f_err; } + } - p += i; - n -= param_len; + /* Nothing else to do for plain PSK or RSAPSK */ + if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { } else #endif /* !OPENSSL_NO_PSK */ #ifndef OPENSSL_NO_SRP if (alg_k & SSL_kSRP) { - param_len = 2; - if (param_len > n) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - n2s(p, i); - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); - goto f_err; - } - param_len += i; - - if ((s->srp_ctx.N = BN_bin2bn(p, i, NULL)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); - goto err; - } - p += i; - - if (2 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 2; - - n2s(p, i); - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); - goto f_err; - } - param_len += i; - - if ((s->srp_ctx.g = BN_bin2bn(p, i, NULL)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); - goto err; - } - p += i; - - if (1 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 1; - - i = (unsigned int)(p[0]); - p++; - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); - goto f_err; - } - param_len += i; - - if ((s->srp_ctx.s = BN_bin2bn(p, i, NULL)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); - goto err; - } - p += i; - - if (2 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 2; - - n2s(p, i); - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); + PACKET prime, generator, salt, server_pub; + if (!PACKET_get_length_prefixed_2(&pkt, &prime) + || !PACKET_get_length_prefixed_2(&pkt, &generator) + || !PACKET_get_length_prefixed_1(&pkt, &salt) + || !PACKET_get_length_prefixed_2(&pkt, &server_pub)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); goto f_err; } - param_len += i; - if ((s->srp_ctx.B = BN_bin2bn(p, i, NULL)) == NULL) { + if ((s->srp_ctx.N = + BN_bin2bn(PACKET_data(&prime), + PACKET_remaining(&prime), NULL)) == NULL + || (s->srp_ctx.g = + BN_bin2bn(PACKET_data(&generator), + PACKET_remaining(&generator), NULL)) == NULL + || (s->srp_ctx.s = + BN_bin2bn(PACKET_data(&salt), + PACKET_remaining(&salt), NULL)) == NULL + || (s->srp_ctx.B = + BN_bin2bn(PACKET_data(&server_pub), + PACKET_remaining(&server_pub), NULL)) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } - p += i; - n -= param_len; if (!srp_verify_server_param(s, &al)) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); goto f_err; } /* We must check if there is a certificate */ -# ifndef OPENSSL_NO_RSA - if (alg_a & SSL_aRSA) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); -# else - if (0) ; -# endif -# ifndef OPENSSL_NO_DSA - else if (alg_a & SSL_aDSS) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. - x509); -# endif + if (alg_a & (SSL_aRSA|SSL_aDSS)) + pkey = X509_get_pubkey(s->session->peer); } else #endif /* !OPENSSL_NO_SRP */ #ifndef OPENSSL_NO_RSA if (alg_k & SSL_kRSA) { + PACKET mod, exp; /* Temporary RSA keys only allowed in export ciphersuites */ if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); - goto f_err; - } - if ((rsa = RSA_new()) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); - goto err; - } - - param_len = 2; - if (param_len > n) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } - n2s(p, i); - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); + if (!PACKET_get_length_prefixed_2(&pkt, &mod) + || !PACKET_get_length_prefixed_2(&pkt, &exp)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); goto f_err; } - param_len += i; - if ((rsa->n = BN_bin2bn(p, i, rsa->n)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); + if ((rsa = RSA_new()) == NULL) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } - p += i; - - if (2 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 2; - - n2s(p, i); - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); - goto f_err; - } - param_len += i; - if ((rsa->e = BN_bin2bn(p, i, rsa->e)) == NULL) { + if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod), + rsa->n)) == NULL + || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp), + rsa->e)) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } - p += i; - n -= param_len; /* this should be because we are using an export cipher */ if (alg_a & SSL_aRSA) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); + pkey = X509_get_pubkey(s->session->peer); else { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } - s->session->sess_cert->peer_rsa_tmp = rsa; + + if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { + al = SSL_AD_UNEXPECTED_MESSAGE; + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); + goto f_err; + } + + s->s3->peer_rsa_tmp = rsa; rsa = NULL; } #else /* OPENSSL_NO_RSA */ if (0) ; #endif #ifndef OPENSSL_NO_DH - else if (alg_k & SSL_kDHE) { - if ((dh = DH_new()) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); - goto err; - } - - param_len = 2; - if (param_len > n) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - n2s(p, i); + else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { + PACKET prime, generator, pub_key; - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); + if (!PACKET_get_length_prefixed_2(&pkt, &prime) + || !PACKET_get_length_prefixed_2(&pkt, &generator) + || !PACKET_get_length_prefixed_2(&pkt, &pub_key)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); goto f_err; } - param_len += i; - if ((dh->p = BN_bin2bn(p, i, NULL)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); + if ((dh = DH_new()) == NULL) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } - p += i; - - if (2 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 2; - - n2s(p, i); - - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); - goto f_err; - } - param_len += i; - if ((dh->g = BN_bin2bn(p, i, NULL)) == NULL) { + if ((dh->p = BN_bin2bn(PACKET_data(&prime), + PACKET_remaining(&prime), NULL)) == NULL + || (dh->g = BN_bin2bn(PACKET_data(&generator), + PACKET_remaining(&generator), NULL)) == NULL + || (dh->pub_key = + BN_bin2bn(PACKET_data(&pub_key), + PACKET_remaining(&pub_key), NULL)) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } - p += i; - - if (2 > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); - goto f_err; - } - param_len += 2; - - n2s(p, i); - if (i > n - param_len) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); + if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); goto f_err; } - param_len += i; - - if ((dh->pub_key = BN_bin2bn(p, i, NULL)) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); - goto err; - } - p += i; - n -= param_len; if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { al = SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); goto f_err; } -# ifndef OPENSSL_NO_RSA - if (alg_a & SSL_aRSA) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); -# else - if (0) ; -# endif -# ifndef OPENSSL_NO_DSA - else if (alg_a & SSL_aDSS) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. - x509); -# endif + if (alg_a & (SSL_aRSA|SSL_aDSS)) + pkey = X509_get_pubkey(s->session->peer); /* else anonymous DH, so no certificate or pkey. */ - s->session->sess_cert->peer_dh_tmp = dh; + s->s3->peer_dh_tmp = dh; dh = NULL; } #endif /* !OPENSSL_NO_DH */ #ifndef OPENSSL_NO_EC - else if (alg_k & SSL_kECDHE) { + else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { EC_GROUP *ngroup; const EC_GROUP *group; + PACKET encoded_pt; + unsigned char *ecparams; if ((ecdh = EC_KEY_new()) == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } /* * Extract elliptic curve parameters and the server's ephemeral ECDH - * public key. Keep accumulating lengths of various components in - * param_len and make sure it never exceeds n. + * public key. For now we only support named (not generic) curves and + * ECParameters in this case is just three bytes. */ - - /* - * XXX: For now we only support named (not generic) curves and the - * ECParameters in this case is just three bytes. We also need one - * byte for the length of the encoded point - */ - param_len = 4; - if (param_len > n) { + if (!PACKET_get_bytes(&pkt, &ecparams, 3)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } @@ -1835,25 +1770,25 @@ int ssl3_get_key_exchange(SSL *s) * Check curve is one of our preferences, if not server has sent an * invalid curve. ECParameters is 3 bytes. */ - if (!tls1_check_curve(s, p, 3)) { + if (!tls1_check_curve(s, ecparams, 3)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); goto f_err; } - if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) { + if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) { al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); goto f_err; } ngroup = EC_GROUP_new_by_curve_name(curve_nid); if (ngroup == NULL) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } if (EC_KEY_set_group(ecdh, ngroup) == 0) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } EC_GROUP_free(ngroup); @@ -1863,33 +1798,28 @@ int ssl3_get_key_exchange(SSL *s) if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && (EC_GROUP_get_degree(group) > 163)) { al = SSL_AD_EXPORT_RESTRICTION; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); goto f_err; } - p += 3; - /* Next, get the encoded ECPoint */ if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || ((bn_ctx = BN_CTX_new()) == NULL)) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } - encoded_pt_len = *p; /* length of encoded point */ - p += 1; + if (!PACKET_get_length_prefixed_1(&pkt, &encoded_pt)) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); + goto f_err; + } - if ((encoded_pt_len > n - param_len) || - (EC_POINT_oct2point(group, srvr_ecpoint, - p, encoded_pt_len, bn_ctx) == 0)) { + if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt), + PACKET_remaining(&encoded_pt), bn_ctx) == 0) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); goto f_err; } - param_len += encoded_pt_len; - - n -= param_len; - p += encoded_pt_len; /* * The ECC/TLS specification does not mention the use of DSA to sign @@ -1899,19 +1829,15 @@ int ssl3_get_key_exchange(SSL *s) if (0) ; # ifndef OPENSSL_NO_RSA else if (alg_a & SSL_aRSA) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); + pkey = X509_get_pubkey(s->session->peer); # endif # ifndef OPENSSL_NO_EC else if (alg_a & SSL_aECDSA) - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); + pkey = X509_get_pubkey(s->session->peer); # endif /* else anonymous ECDH, so no certificate or pkey. */ EC_KEY_set_public_key(ecdh, srvr_ecpoint); - s->session->sess_cert->peer_ecdh_tmp = ecdh; + s->s3->peer_ecdh_tmp = ecdh; ecdh = NULL; BN_CTX_free(bn_ctx); bn_ctx = NULL; @@ -1919,22 +1845,34 @@ int ssl3_get_key_exchange(SSL *s) srvr_ecpoint = NULL; } else if (alg_k) { al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } #endif /* !OPENSSL_NO_EC */ - /* p points to the next byte, there are 'n' bytes left */ - /* if it was signed, check the signature */ if (pkey != NULL) { + PACKET params; + /* + * |pkt| now points to the beginning of the signature, so the difference + * equals the length of the parameters. + */ + if (!PACKET_get_sub_packet(&save_param_start, ¶ms, + PACKET_remaining(&save_param_start) - + PACKET_remaining(&pkt))) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto f_err; + } + if (SSL_USE_SIGALGS(s)) { + unsigned char *sigalgs; int rv; - if (2 > n) { + if (!PACKET_get_bytes(&pkt, &sigalgs, 2)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } - rv = tls12_check_peer_sigalg(&md, s, p, pkey); + rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); if (rv == -1) goto err; else if (rv == 0) { @@ -1943,25 +1881,27 @@ int ssl3_get_key_exchange(SSL *s) #ifdef SSL_DEBUG fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); #endif - p += 2; - n -= 2; - } else + } else { md = EVP_sha1(); + } - if (2 > n) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); + if (!PACKET_get_length_prefixed_2(&pkt, &signature) + || PACKET_remaining(&pkt) != 0) { + SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); goto f_err; } - n2s(p, i); - n -= 2; j = EVP_PKEY_size(pkey); + if (j < 0) { + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto f_err; + } /* - * Check signature length. If n is 0 then signature is empty + * Check signature length */ - if ((i != n) || (n > j) || (n <= 0)) { + if (PACKET_remaining(&signature) > (size_t)j) { /* wrong packet length */ - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); goto f_err; } #ifndef OPENSSL_NO_RSA @@ -1979,21 +1919,24 @@ int ssl3_get_key_exchange(SSL *s) SSL3_RANDOM_SIZE); EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE); - EVP_DigestUpdate(&md_ctx, param, param_len); + EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms), + PACKET_remaining(¶ms)); EVP_DigestFinal_ex(&md_ctx, q, &size); q += size; j += size; } - i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); - if (i < 0) { + verify_ret = + RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature), + PACKET_remaining(&signature), pkey->pkey.rsa); + if (verify_ret < 0) { al = SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); goto f_err; } - if (i == 0) { + if (verify_ret == 0) { /* bad signature */ al = SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); goto f_err; } } else @@ -2004,32 +1947,34 @@ int ssl3_get_key_exchange(SSL *s) SSL3_RANDOM_SIZE); EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE); - EVP_VerifyUpdate(&md_ctx, param, param_len); - if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { + EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms), + PACKET_remaining(¶ms)); + if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature), + PACKET_remaining(&signature), pkey) <= 0) { /* bad signature */ al = SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); goto f_err; } } } else { - /* aNULL, aSRP or kPSK do not need public keys */ - if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) { + /* aNULL, aSRP or PSK do not need public keys */ + if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { /* Might be wrong key type, check it */ if (ssl3_check_cert_and_algorithm(s)) /* Otherwise this shouldn't happen */ - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } /* still data left over */ - if (n != 0) { - SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); + if (PACKET_remaining(&pkt) != 0) { + SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); goto f_err; } } EVP_PKEY_free(pkey); EVP_MD_CTX_cleanup(&md_ctx); - return (1); + return MSG_PROCESS_CONTINUE_READING; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: @@ -2046,19 +1991,14 @@ int ssl3_get_key_exchange(SSL *s) EC_KEY_free(ecdh); #endif EVP_MD_CTX_cleanup(&md_ctx); - s->state = SSL_ST_ERR; - return (-1); + statem_set_error(s); + return MSG_PROCESS_ERROR; } int ssl3_get_certificate_request(SSL *s) { - int ok, ret = 0; - unsigned long n, nc, l; - unsigned int llen, ctype_num, i; - X509_NAME *xn = NULL; - const unsigned char *p, *q; - unsigned char *d; - STACK_OF(X509_NAME) *ca_sk = NULL; + long n; + int ok; n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_REQ_A, @@ -2076,10 +2016,8 @@ int ssl3_get_certificate_request(SSL *s) * If we get here we don't need any cached handshake records as we * wont be doing client auth. */ - if (s->s3->handshake_buffer) { - if (!ssl3_digest_cached_records(s)) - goto err; - } + if (!ssl3_digest_cached_records(s, 0)) + goto err; return (1); } @@ -2099,100 +2037,120 @@ int ssl3_get_certificate_request(SSL *s) } } - p = d = (unsigned char *)s->init_msg; + return tls_process_certificate_request(s, (unsigned long)n); + err: + s->state = SSL_ST_ERR; + return -1; +} + + +enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, unsigned long n) +{ + int ret = MSG_PROCESS_ERROR; + unsigned int list_len, ctype_num, i, name_len; + X509_NAME *xn = NULL; + unsigned char *data; + unsigned char *namestart, *namebytes; + STACK_OF(X509_NAME) *ca_sk = NULL; + PACKET pkt; + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); + goto err; + } if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } /* get the certificate types */ - ctype_num = *(p++); + if (!PACKET_get_1(&pkt, &ctype_num) + || !PACKET_get_bytes(&pkt, &data, ctype_num)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); + goto err; + } OPENSSL_free(s->cert->ctypes); s->cert->ctypes = NULL; if (ctype_num > SSL3_CT_NUMBER) { /* If we exceed static buffer copy all to cert structure */ s->cert->ctypes = OPENSSL_malloc(ctype_num); if (s->cert->ctypes == NULL) { - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } - memcpy(s->cert->ctypes, p, ctype_num); + memcpy(s->cert->ctypes, data, ctype_num); s->cert->ctype_num = (size_t)ctype_num; ctype_num = SSL3_CT_NUMBER; } for (i = 0; i < ctype_num; i++) - s->s3->tmp.ctype[i] = p[i]; - p += p[-1]; + s->s3->tmp.ctype[i] = data[i]; + if (SSL_USE_SIGALGS(s)) { - n2s(p, llen); - /* - * Check we have enough room for signature algorithms and following - * length value. - */ - if ((unsigned long)(p - d + llen + 2) > n) { + if (!PACKET_get_net_2(&pkt, &list_len) + || !PACKET_get_bytes(&pkt, &data, list_len)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, - SSL_R_DATA_LENGTH_TOO_LONG); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, + SSL_R_LENGTH_MISMATCH); goto err; } + /* Clear certificate digests and validity flags */ for (i = 0; i < SSL_PKEY_NUM; i++) { s->s3->tmp.md[i] = NULL; s->s3->tmp.valid_flags[i] = 0; } - if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) { + if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_SIGNATURE_ALGORITHMS_ERROR); goto err; } if (!tls1_process_sigalgs(s)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } - p += llen; } /* get the CA RDNs */ - n2s(p, llen); - - if ((unsigned long)(p - d + llen) != n) { + if (!PACKET_get_net_2(&pkt, &list_len) + || PACKET_remaining(&pkt) != list_len) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); goto err; } - for (nc = 0; nc < llen;) { - n2s(p, l); - if ((l + nc + 2) > llen) { + while (PACKET_remaining(&pkt)) { + if (!PACKET_get_net_2(&pkt, &name_len) + || !PACKET_get_bytes(&pkt, &namebytes, name_len)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, + SSL_R_LENGTH_MISMATCH); goto err; } - q = p; + namestart = namebytes; - if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { + if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, + name_len)) == NULL) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); goto err; } - if (q != (p + l)) { + if (namebytes != (namestart + name_len)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_CA_DN_LENGTH_MISMATCH); goto err; } if (!sk_X509_NAME_push(ca_sk, xn)) { - SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } - - p += l; - nc += l + 2; } /* we should setup a certificate to return.... */ @@ -2202,13 +2160,13 @@ int ssl3_get_certificate_request(SSL *s) s->s3->tmp.ca_names = ca_sk; ca_sk = NULL; - ret = 1; + ret = MSG_PROCESS_CONTINUE_READING; goto done; err: - s->state = SSL_ST_ERR; + statem_set_error(s); done: sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); - return (ret); + return ret; } static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) @@ -2218,10 +2176,8 @@ static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) int ssl3_get_new_session_ticket(SSL *s) { - int ok, al, ret = 0, ticklen; long n; - const unsigned char *p; - unsigned char *d; + int ok; n = s->method->ssl_get_message(s, SSL3_ST_CR_SESSION_TICKET_A, @@ -2231,30 +2187,80 @@ int ssl3_get_new_session_ticket(SSL *s) if (!ok) return ((int)n); - if (n < 6) { - /* need at least ticket_lifetime_hint + ticket length */ - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); + return tls_process_new_session_ticket(s, (unsigned long)n); +} + +enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, unsigned long n) +{ + int al; + unsigned int ticklen; + unsigned long ticket_lifetime_hint; + PACKET pkt; + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_INTERNAL_ERROR); goto f_err; } - p = d = (unsigned char *)s->init_msg; - n2l(p, s->session->tlsext_tick_lifetime_hint); - n2s(p, ticklen); - /* ticket_lifetime_hint + ticket_length + ticket */ - if (ticklen + 6 != n) { + if (!PACKET_get_net_4(&pkt, &ticket_lifetime_hint) + || !PACKET_get_net_2(&pkt, &ticklen) + || PACKET_remaining(&pkt) != ticklen) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); goto f_err; } + + /* Server is allowed to change its mind and send an empty ticket. */ + if (ticklen == 0) + return 1; + + if (s->session->session_id_length > 0) { + int i = s->session_ctx->session_cache_mode; + SSL_SESSION *new_sess; + /* + * We reused an existing session, so we need to replace it with a new + * one + */ + if (i & SSL_SESS_CACHE_CLIENT) { + /* + * Remove the old session from the cache + */ + if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { + if (s->session_ctx->remove_session_cb != NULL) + s->session_ctx->remove_session_cb(s->session_ctx, + s->session); + } else { + /* We carry on if this fails */ + SSL_CTX_remove_session(s->session_ctx, s->session); + } + } + + if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); + goto f_err; + } + + SSL_SESSION_free(s->session); + s->session = new_sess; + } + OPENSSL_free(s->session->tlsext_tick); s->session->tlsext_ticklen = 0; + s->session->tlsext_tick = OPENSSL_malloc(ticklen); if (!s->session->tlsext_tick) { - SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); goto err; } - memcpy(s->session->tlsext_tick, p, ticklen); + if (!PACKET_copy_bytes(&pkt, s->session->tlsext_tick, ticklen)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); + goto f_err; + } + + s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; s->session->tlsext_ticklen = ticklen; /* * There are two ways to detect a resumed ticket session. One is to set @@ -2267,23 +2273,21 @@ int ssl3_get_new_session_ticket(SSL *s) * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is * SHA256 is disabled) hash of the ticket. */ - EVP_Digest(p, ticklen, + EVP_Digest(s->session->tlsext_tick, ticklen, s->session->session_id, &s->session->session_id_length, EVP_sha256(), NULL); - ret = 1; - return (ret); + return MSG_PROCESS_CONTINUE_READING; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: - s->state = SSL_ST_ERR; - return (-1); + statem_set_error(s); + return MSG_PROCESS_ERROR; } int ssl3_get_cert_status(SSL *s) { - int ok, al; - unsigned long resplen, n; - const unsigned char *p; + long n; + int ok; n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_STATUS_A, @@ -2292,29 +2296,44 @@ int ssl3_get_cert_status(SSL *s) if (!ok) return ((int)n); - if (n < 4) { - /* need at least status type + length */ - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); - goto f_err; - } - p = (unsigned char *)s->init_msg; - if (*p++ != TLSEXT_STATUSTYPE_ocsp) { - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); + + return tls_process_cert_status(s, (unsigned long)n); +} + +enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, unsigned long n) +{ + int al; + unsigned long resplen; + unsigned int type; + PACKET pkt; + + if (!PACKET_buf_init(&pkt, s->init_msg, n)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_INTERNAL_ERROR); + goto f_err; + } + if (!PACKET_get_1(&pkt, &type) + || type != TLSEXT_STATUSTYPE_ocsp) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); goto f_err; } - n2l3(p, resplen); - if (resplen + 4 != n) { + if (!PACKET_get_net_3(&pkt, &resplen) + || PACKET_remaining(&pkt) != resplen) { al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); goto f_err; } OPENSSL_free(s->tlsext_ocsp_resp); - s->tlsext_ocsp_resp = BUF_memdup(p, resplen); + s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); if (!s->tlsext_ocsp_resp) { al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); + goto f_err; + } + if (!PACKET_copy_bytes(&pkt, s->tlsext_ocsp_resp, resplen)) { + al = SSL_AD_DECODE_ERROR; + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); goto f_err; } s->tlsext_ocsp_resplen = resplen; @@ -2323,26 +2342,26 @@ int ssl3_get_cert_status(SSL *s) ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); if (ret == 0) { al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); goto f_err; } if (ret < 0) { al = SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); goto f_err; } } - return 1; + return MSG_PROCESS_CONTINUE_READING; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); - s->state = SSL_ST_ERR; - return (-1); + statem_set_error(s); + return MSG_PROCESS_ERROR; } int ssl3_get_server_done(SSL *s) { - int ok, ret = 0; long n; + int ok; /* Second to last param should be very small, like 0 :-) */ n = s->method->ssl_get_message(s, @@ -2352,21 +2371,67 @@ int ssl3_get_server_done(SSL *s) if (!ok) return ((int)n); + + return tls_process_server_done(s, (unsigned long)n); +} + +enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, unsigned long n) +{ if (n > 0) { /* should contain no data */ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); - s->state = SSL_ST_ERR; - return -1; + SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); + statem_set_error(s); + return MSG_PROCESS_ERROR; } - ret = 1; - return (ret); + +#ifndef OPENSSL_NO_SRP + if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { + if (SRP_Calc_A_param(s) <= 0) { + SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + statem_set_error(s); + return MSG_PROCESS_ERROR; + } + } +#endif + + return MSG_PROCESS_FINISHED_READING; } int ssl3_send_client_key_exchange(SSL *s) +{ + int n; + + if (s->state == SSL3_ST_CW_KEY_EXCH_A) { + if(tls_construct_client_key_exchange(s) == 0) + goto err; + + s->state = SSL3_ST_CW_KEY_EXCH_B; + } + + /* SSL3_ST_CW_KEY_EXCH_B */ + n = ssl_do_write(s); + + if (n > 0) { + if (tls_client_key_exchange_post_work(s) == 0) + goto err; + } + + return n; + err: + s->state = SSL_ST_ERR; + return -1; + +} + +int tls_construct_client_key_exchange(SSL *s) { unsigned char *p; int n; +#ifndef OPENSSL_NO_PSK + size_t pskhdrlen = 0; +#endif unsigned long alg_k; #ifndef OPENSSL_NO_RSA unsigned char *q; @@ -2382,630 +2447,542 @@ int ssl3_send_client_key_exchange(SSL *s) #endif unsigned char *pms = NULL; size_t pmslen = 0; + alg_k = s->s3->tmp.new_cipher->algorithm_mkey; - if (s->state == SSL3_ST_CW_KEY_EXCH_A) { - p = ssl_handshake_start(s); + p = ssl_handshake_start(s); - alg_k = s->s3->tmp.new_cipher->algorithm_mkey; - /* Fool emacs indentation */ - if (0) { +#ifndef OPENSSL_NO_PSK + if (alg_k & SSL_PSK) { + int psk_err = 1; + /* + * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a + * \0-terminated identity. The last byte is for us for simulating + * strnlen. + */ + char identity[PSK_MAX_IDENTITY_LEN + 1]; + size_t identitylen; + unsigned char psk[PSK_MAX_PSK_LEN]; + size_t psklen; + + if (s->psk_client_callback == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_NO_CLIENT_CB); + goto err; } -#ifndef OPENSSL_NO_RSA - else if (alg_k & SSL_kRSA) { - RSA *rsa; - pmslen = SSL_MAX_MASTER_KEY_LENGTH; - pms = OPENSSL_malloc(pmslen); - if (!pms) - goto memerr; - - if (s->session->sess_cert == NULL) { - /* - * We should always have a server certificate with SSL_kRSA. - */ - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } - - if (s->session->sess_cert->peer_rsa_tmp != NULL) - rsa = s->session->sess_cert->peer_rsa_tmp; - else { - pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. - x509); - if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) - || (pkey->pkey.rsa == NULL)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } - rsa = pkey->pkey.rsa; - EVP_PKEY_free(pkey); - } - pms[0] = s->client_version >> 8; - pms[1] = s->client_version & 0xff; - if (RAND_bytes(pms + 2, pmslen - 2) <= 0) - goto err; + memset(identity, 0, sizeof(identity)); - q = p; - /* Fix buf for TLS and beyond */ - if (s->version > SSL3_VERSION) - p += 2; - n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); -# ifdef PKCS1_CHECK - if (s->options & SSL_OP_PKCS1_CHECK_1) - p[1]++; - if (s->options & SSL_OP_PKCS1_CHECK_2) - tmp_buf[0] = 0x70; -# endif - if (n <= 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_BAD_RSA_ENCRYPT); - goto err; - } + psklen = s->psk_client_callback(s, s->session->psk_identity_hint, + identity, sizeof(identity) - 1, + psk, sizeof(psk)); - /* Fix buf for TLS and beyond */ - if (s->version > SSL3_VERSION) { - s2n(n, q); - n += 2; - } + if (psklen > PSK_MAX_PSK_LEN) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto psk_err; + } else if (psklen == 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_PSK_IDENTITY_NOT_FOUND); + goto psk_err; } -#endif -#ifndef OPENSSL_NO_DH - else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) { - DH *dh_srvr, *dh_clnt; - SESS_CERT *scert = s->session->sess_cert; - - if (scert == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_UNEXPECTED_MESSAGE); - goto err; - } - if (scert->peer_dh_tmp != NULL) - dh_srvr = scert->peer_dh_tmp; - else { - /* we get them from the cert */ - int idx = scert->peer_cert_type; - EVP_PKEY *spkey = NULL; - dh_srvr = NULL; - if (idx >= 0) - spkey = X509_get_pubkey(scert->peer_pkeys[idx].x509); - if (spkey) { - dh_srvr = EVP_PKEY_get1_DH(spkey); - EVP_PKEY_free(spkey); - } - if (dh_srvr == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } - } - if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { - /* Use client certificate key */ - EVP_PKEY *clkey = s->cert->key->privatekey; - dh_clnt = NULL; - if (clkey) - dh_clnt = EVP_PKEY_get1_DH(clkey); - if (dh_clnt == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } - } else { - /* generate a new random key */ - if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); - goto err; - } - if (!DH_generate_key(dh_clnt)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); - DH_free(dh_clnt); - goto err; - } - } - - pmslen = DH_size(dh_clnt); - pms = OPENSSL_malloc(pmslen); - if (!pms) - goto memerr; + OPENSSL_free(s->s3->tmp.psk); + s->s3->tmp.psk = BUF_memdup(psk, psklen); + OPENSSL_cleanse(psk, psklen); - /* - * use the 'p' output buffer for the DH key, but make sure to - * clear it out afterwards - */ - - n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); - if (scert->peer_dh_tmp == NULL) - DH_free(dh_srvr); + if (s->s3->tmp.psk == NULL) { + OPENSSL_cleanse(identity, sizeof(identity)); + goto memerr; + } - if (n <= 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); - DH_free(dh_clnt); - goto err; - } - pmslen = n; - - if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) - n = 0; - else { - /* send off the data */ - n = BN_num_bytes(dh_clnt->pub_key); - s2n(n, p); - BN_bn2bin(dh_clnt->pub_key, p); - n += 2; - } + s->s3->tmp.psklen = psklen; - DH_free(dh_clnt); + identitylen = strlen(identity); + if (identitylen > PSK_MAX_IDENTITY_LEN) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto psk_err; + } + OPENSSL_free(s->session->psk_identity); + s->session->psk_identity = BUF_strdup(identity); + if (s->session->psk_identity == NULL) { + OPENSSL_cleanse(identity, sizeof(identity)); + goto memerr; + } - /* perhaps clean things up a bit EAY EAY EAY EAY */ + s2n(identitylen, p); + memcpy(p, identity, identitylen); + pskhdrlen = 2 + identitylen; + p += identitylen; + psk_err = 0; +psk_err: + OPENSSL_cleanse(identity, sizeof(identity)); + if (psk_err != 0) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); + goto err; } + } + if (alg_k & SSL_kPSK) { + n = 0; + } else #endif -#ifndef OPENSSL_NO_EC - else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe)) { - const EC_GROUP *srvr_group = NULL; - EC_KEY *tkey; - int ecdh_clnt_cert = 0; - int field_size = 0; - - if (s->session->sess_cert == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_UNEXPECTED_MESSAGE); - goto err; - } - + /* Fool emacs indentation */ + if (0) { + } +#ifndef OPENSSL_NO_RSA + else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { + RSA *rsa; + pmslen = SSL_MAX_MASTER_KEY_LENGTH; + pms = OPENSSL_malloc(pmslen); + if (!pms) + goto memerr; + + if (s->session->peer == NULL) { /* - * Did we send out the client's ECDH share for use in premaster - * computation as part of client certificate? If so, set - * ecdh_clnt_cert to 1. + * We should always have a server certificate with SSL_kRSA. */ - if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { - /*- - * XXX: For now, we do not support client - * authentication using ECDH certificates. - * To add such support, one needs to add - * code that checks for appropriate - * conditions and sets ecdh_clnt_cert to 1. - * For example, the cert have an ECC - * key on the same curve as the server's - * and the key should be authorized for - * key agreement. - * - * One also needs to add code in ssl3_connect - * to skip sending the certificate verify - * message. - * - * if ((s->cert->key->privatekey != NULL) && - * (s->cert->key->privatekey->type == - * EVP_PKEY_EC) && ...) - * ecdh_clnt_cert = 1; - */ - } - - if (s->session->sess_cert->peer_ecdh_tmp != NULL) { - tkey = s->session->sess_cert->peer_ecdh_tmp; - } else { - /* Get the Server Public Key from Cert */ - srvr_pub_pkey = - X509_get_pubkey(s->session-> - sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); - if ((srvr_pub_pkey == NULL) - || (srvr_pub_pkey->type != EVP_PKEY_EC) - || (srvr_pub_pkey->pkey.ec == NULL)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + } - tkey = srvr_pub_pkey->pkey.ec; + if (s->s3->peer_rsa_tmp != NULL) + rsa = s->s3->peer_rsa_tmp; + else { + pkey = X509_get_pubkey(s->session->peer); + if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) + || (pkey->pkey.rsa == NULL)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + EVP_PKEY_free(pkey); + goto err; } + rsa = pkey->pkey.rsa; + EVP_PKEY_free(pkey); + } - srvr_group = EC_KEY_get0_group(tkey); - srvr_ecpoint = EC_KEY_get0_public_key(tkey); + pms[0] = s->client_version >> 8; + pms[1] = s->client_version & 0xff; + if (RAND_bytes(pms + 2, pmslen - 2) <= 0) + goto err; + + q = p; + /* Fix buf for TLS and beyond */ + if (s->version > SSL3_VERSION) + p += 2; + n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); +# ifdef PKCS1_CHECK + if (s->options & SSL_OP_PKCS1_CHECK_1) + p[1]++; + if (s->options & SSL_OP_PKCS1_CHECK_2) + tmp_buf[0] = 0x70; +# endif + if (n <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_BAD_RSA_ENCRYPT); + goto err; + } - if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, + /* Fix buf for TLS and beyond */ + if (s->version > SSL3_VERSION) { + s2n(n, q); + n += 2; + } + } +#endif +#ifndef OPENSSL_NO_DH + else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) { + DH *dh_srvr, *dh_clnt; + if (s->s3->peer_dh_tmp != NULL) + dh_srvr = s->s3->peer_dh_tmp; + else { + /* we get them from the cert */ + EVP_PKEY *spkey = NULL; + dh_srvr = NULL; + spkey = X509_get_pubkey(s->session->peer); + if (spkey) { + dh_srvr = EVP_PKEY_get1_DH(spkey); + EVP_PKEY_free(spkey); + } + if (dh_srvr == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } - - if ((clnt_ecdh = EC_KEY_new()) == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); + } + if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { + /* Use client certificate key */ + EVP_PKEY *clkey = s->cert->key->privatekey; + dh_clnt = NULL; + if (clkey) + dh_clnt = EVP_PKEY_get1_DH(clkey); + if (dh_clnt == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); goto err; } - - if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); + } else { + /* generate a new random key */ + if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } - if (ecdh_clnt_cert) { - /* - * Reuse key info from our certificate We only need our - * private key to perform the ECDH computation. - */ - const BIGNUM *priv_key; - tkey = s->cert->key->privatekey->pkey.ec; - priv_key = EC_KEY_get0_private_key(tkey); - if (priv_key == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } - if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); - goto err; - } - } else { - /* Generate a new ECDH key pair */ - if (!(EC_KEY_generate_key(clnt_ecdh))) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_ECDH_LIB); - goto err; - } + if (!DH_generate_key(dh_clnt)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); + DH_free(dh_clnt); + goto err; } + } - /* - * use the 'p' output buffer for the ECDH key, but make sure to - * clear it out afterwards - */ + pmslen = DH_size(dh_clnt); + pms = OPENSSL_malloc(pmslen); + if (!pms) + goto memerr; - field_size = EC_GROUP_get_degree(srvr_group); - if (field_size <= 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); - goto err; - } - pmslen = (field_size + 7) / 8; - pms = OPENSSL_malloc(pmslen); - if (!pms) - goto memerr; - n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); - if (n <= 0 || pmslen != (size_t)n) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); - goto err; - } + /* + * use the 'p' output buffer for the DH key, but make sure to + * clear it out afterwards + */ - if (ecdh_clnt_cert) { - /* Send empty client key exch message */ - n = 0; - } else { - /* - * First check the size of encoding and allocate memory - * accordingly. - */ - encoded_pt_len = - EC_POINT_point2oct(srvr_group, - EC_KEY_get0_public_key(clnt_ecdh), - POINT_CONVERSION_UNCOMPRESSED, - NULL, 0, NULL); - - encodedPoint = (unsigned char *) - OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); - bn_ctx = BN_CTX_new(); - if ((encodedPoint == NULL) || (bn_ctx == NULL)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } + n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); + if (s->s3->peer_dh_tmp == NULL) + DH_free(dh_srvr); - /* Encode the public key */ - n = EC_POINT_point2oct(srvr_group, - EC_KEY_get0_public_key(clnt_ecdh), - POINT_CONVERSION_UNCOMPRESSED, - encodedPoint, encoded_pt_len, bn_ctx); - - *p = n; /* length of encoded point */ - /* Encoded point will be copied here */ - p += 1; - /* copy the point */ - memcpy(p, encodedPoint, n); - /* increment n to account for length field */ - n += 1; - } + if (n <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); + DH_free(dh_clnt); + goto err; + } + pmslen = n; - /* Free allocated memory */ - BN_CTX_free(bn_ctx); - OPENSSL_free(encodedPoint); - EC_KEY_free(clnt_ecdh); - EVP_PKEY_free(srvr_pub_pkey); + if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) + n = 0; + else { + /* send off the data */ + n = BN_num_bytes(dh_clnt->pub_key); + s2n(n, p); + BN_bn2bin(dh_clnt->pub_key, p); + n += 2; } -#endif /* !OPENSSL_NO_EC */ - else if (alg_k & SSL_kGOST) { - /* GOST key exchange message creation */ - EVP_PKEY_CTX *pkey_ctx; - X509 *peer_cert; - size_t msglen; - unsigned int md_len; - int keytype; - unsigned char shared_ukm[32], tmp[256]; - EVP_MD_CTX *ukm_hash; - EVP_PKEY *pub_key; - - pmslen = 32; - pms = OPENSSL_malloc(pmslen); - if (!pms) - goto memerr; - /* - * Get server sertificate PKEY and create ctx from it - */ - peer_cert = - s->session-> - sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509; - if (!peer_cert) - peer_cert = - s->session-> - sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509; - if (!peer_cert) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); - goto err; - } + DH_free(dh_clnt); + } +#endif - pkey_ctx = EVP_PKEY_CTX_new(pub_key = - X509_get_pubkey(peer_cert), NULL); - /* - * If we have send a certificate, and certificate key +#ifndef OPENSSL_NO_EC + else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { + const EC_GROUP *srvr_group = NULL; + EC_KEY *tkey; + int ecdh_clnt_cert = 0; + int field_size = 0; + /* + * Did we send out the client's ECDH share for use in premaster + * computation as part of client certificate? If so, set + * ecdh_clnt_cert to 1. + */ + if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { + /*- + * XXX: For now, we do not support client + * authentication using ECDH certificates. + * To add such support, one needs to add + * code that checks for appropriate + * conditions and sets ecdh_clnt_cert to 1. + * For example, the cert have an ECC + * key on the same curve as the server's + * and the key should be authorized for + * key agreement. + * + * One also needs to add code in ssl3_connect + * to skip sending the certificate verify + * message. * - * * parameters match those of server certificate, use - * certificate key for key exchange + * if ((s->cert->key->privatekey != NULL) && + * (s->cert->key->privatekey->type == + * EVP_PKEY_EC) && ...) + * ecdh_clnt_cert = 1; */ + } - /* Otherwise, generate ephemeral key pair */ - - EVP_PKEY_encrypt_init(pkey_ctx); - /* Generate session key */ - if (RAND_bytes(pms, pmslen) <= 0) { - EVP_PKEY_CTX_free(pkey_ctx); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, + if (s->s3->peer_ecdh_tmp != NULL) { + tkey = s->s3->peer_ecdh_tmp; + } else { + /* Get the Server Public Key from Cert */ + srvr_pub_pkey = X509_get_pubkey(s->session->peer); + if ((srvr_pub_pkey == NULL) + || (srvr_pub_pkey->type != EVP_PKEY_EC) + || (srvr_pub_pkey->pkey.ec == NULL)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; - }; - /* - * If we have client certificate, use its secret as peer key - */ - if (s->s3->tmp.cert_req && s->cert->key->privatekey) { - if (EVP_PKEY_derive_set_peer - (pkey_ctx, s->cert->key->privatekey) <= 0) { - /* - * If there was an error - just ignore it. Ephemeral key - * * would be used - */ - ERR_clear_error(); - } } + + tkey = srvr_pub_pkey->pkey.ec; + } + + srvr_group = EC_KEY_get0_group(tkey); + srvr_ecpoint = EC_KEY_get0_public_key(tkey); + + if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + } + + if ((clnt_ecdh = EC_KEY_new()) == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); + goto err; + } + + if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); + goto err; + } + if (ecdh_clnt_cert) { /* - * Compute shared IV and store it in algorithm-specific context - * data + * Reuse key info from our certificate We only need our + * private key to perform the ECDH computation. */ - ukm_hash = EVP_MD_CTX_create(); - EVP_DigestInit(ukm_hash, - EVP_get_digestbynid(NID_id_GostR3411_94)); - EVP_DigestUpdate(ukm_hash, s->s3->client_random, - SSL3_RANDOM_SIZE); - EVP_DigestUpdate(ukm_hash, s->s3->server_random, - SSL3_RANDOM_SIZE); - EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); - EVP_MD_CTX_destroy(ukm_hash); - if (EVP_PKEY_CTX_ctrl - (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, - shared_ukm) < 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_LIBRARY_BUG); + const BIGNUM *priv_key; + tkey = s->cert->key->privatekey->pkey.ec; + priv_key = EC_KEY_get0_private_key(tkey); + if (priv_key == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); goto err; } - /* Make GOST keytransport blob message */ - /* - * Encapsulate it into sequence - */ - *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; - msglen = 255; - if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_LIBRARY_BUG); + if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } - if (msglen >= 0x80) { - *(p++) = 0x81; - *(p++) = msglen & 0xff; - n = msglen + 3; - } else { - *(p++) = msglen & 0xff; - n = msglen + 2; - } - memcpy(p, tmp, msglen); - /* Check if pubkey from client certificate was used */ - if (EVP_PKEY_CTX_ctrl - (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { - /* Set flag "skip certificate verify" */ - s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; + } else { + /* Generate a new ECDH key pair */ + if (!(EC_KEY_generate_key(clnt_ecdh))) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_ECDH_LIB); + goto err; } - EVP_PKEY_CTX_free(pkey_ctx); - EVP_PKEY_free(pub_key); + } + + /* + * use the 'p' output buffer for the ECDH key, but make sure to + * clear it out afterwards + */ + field_size = EC_GROUP_get_degree(srvr_group); + if (field_size <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); + goto err; } -#ifndef OPENSSL_NO_SRP - else if (alg_k & SSL_kSRP) { - if (s->srp_ctx.A != NULL) { - /* send off the data */ - n = BN_num_bytes(s->srp_ctx.A); - s2n(n, p); - BN_bn2bin(s->srp_ctx.A, p); - n += 2; - } else { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; - } - OPENSSL_free(s->session->srp_username); - s->session->srp_username = BUF_strdup(s->srp_ctx.login); - if (s->session->srp_username == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } + pmslen = (field_size + 7) / 8; + pms = OPENSSL_malloc(pmslen); + if (!pms) + goto memerr; + n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); + if (n <= 0 || pmslen != (size_t)n) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); + goto err; } -#endif -#ifndef OPENSSL_NO_PSK - else if (alg_k & SSL_kPSK) { - /* - * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a - * \0-terminated identity. The last byte is for us for simulating - * strnlen. - */ - char identity[PSK_MAX_IDENTITY_LEN + 2]; - size_t identity_len; - unsigned char *t = NULL; - unsigned int psk_len = 0; - int psk_err = 1; + if (ecdh_clnt_cert) { + /* Send empty client key exch message */ n = 0; - if (s->psk_client_callback == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_PSK_NO_CLIENT_CB); - goto err; - } - - memset(identity, 0, sizeof(identity)); - /* Allocate maximum size buffer */ - pmslen = PSK_MAX_PSK_LEN * 2 + 4; - pms = OPENSSL_malloc(pmslen); - if (!pms) - goto memerr; - - psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, - identity, sizeof(identity) - 1, - pms, pmslen); - if (psk_len > PSK_MAX_PSK_LEN) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto psk_err; - } else if (psk_len == 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - SSL_R_PSK_IDENTITY_NOT_FOUND); - goto psk_err; - } - /* Change pmslen to real length */ - pmslen = 2 + psk_len + 2 + psk_len; - identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; - identity_len = strlen(identity); - if (identity_len > PSK_MAX_IDENTITY_LEN) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto psk_err; - } - /* create PSK pre_master_secret */ - t = pms; - memmove(pms + psk_len + 4, pms, psk_len); - s2n(psk_len, t); - memset(t, 0, psk_len); - t += psk_len; - s2n(psk_len, t); - - OPENSSL_free(s->session->psk_identity_hint); - s->session->psk_identity_hint = - BUF_strdup(s->ctx->psk_identity_hint); - if (s->ctx->psk_identity_hint != NULL - && s->session->psk_identity_hint == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, + } else { + /* + * First check the size of encoding and allocate memory + * accordingly. + */ + encoded_pt_len = + EC_POINT_point2oct(srvr_group, + EC_KEY_get0_public_key(clnt_ecdh), + POINT_CONVERSION_UNCOMPRESSED, + NULL, 0, NULL); + + encodedPoint = (unsigned char *) + OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); + bn_ctx = BN_CTX_new(); + if ((encodedPoint == NULL) || (bn_ctx == NULL)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); - goto psk_err; + goto err; } - OPENSSL_free(s->session->psk_identity); - s->session->psk_identity = BUF_strdup(identity); - if (s->session->psk_identity == NULL) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto psk_err; - } + /* Encode the public key */ + n = EC_POINT_point2oct(srvr_group, + EC_KEY_get0_public_key(clnt_ecdh), + POINT_CONVERSION_UNCOMPRESSED, + encodedPoint, encoded_pt_len, bn_ctx); - s2n(identity_len, p); - memcpy(p, identity, identity_len); - n = 2 + identity_len; - psk_err = 0; - psk_err: - OPENSSL_cleanse(identity, sizeof(identity)); - if (psk_err != 0) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - goto err; - } - } -#endif - else { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto err; + *p = n; /* length of encoded point */ + /* Encoded point will be copied here */ + p += 1; + /* copy the point */ + memcpy(p, encodedPoint, n); + /* increment n to account for length field */ + n += 1; } - if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + /* Free allocated memory */ + BN_CTX_free(bn_ctx); + OPENSSL_free(encodedPoint); + EC_KEY_free(clnt_ecdh); + EVP_PKEY_free(srvr_pub_pkey); + } +#endif /* !OPENSSL_NO_EC */ + else if (alg_k & SSL_kGOST) { + /* GOST key exchange message creation */ + EVP_PKEY_CTX *pkey_ctx; + X509 *peer_cert; + size_t msglen; + unsigned int md_len; + unsigned char shared_ukm[32], tmp[256]; + EVP_MD_CTX *ukm_hash; + EVP_PKEY *pub_key; + + pmslen = 32; + pms = OPENSSL_malloc(pmslen); + if (!pms) + goto memerr; + + /* + * Get server sertificate PKEY and create ctx from it + */ + peer_cert = s->session->peer; + if (!peer_cert) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); goto err; } - s->state = SSL3_ST_CW_KEY_EXCH_B; - } + pkey_ctx = EVP_PKEY_CTX_new(pub_key = + X509_get_pubkey(peer_cert), NULL); + /* + * If we have send a certificate, and certificate key + * + * * parameters match those of server certificate, use + * certificate key for key exchange + */ - /* SSL3_ST_CW_KEY_EXCH_B */ - n = ssl_do_write(s); -#ifndef OPENSSL_NO_SRP - /* Check for SRP */ - if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { + /* Otherwise, generate ephemeral key pair */ + + EVP_PKEY_encrypt_init(pkey_ctx); + /* Generate session key */ + if (RAND_bytes(pms, pmslen) <= 0) { + EVP_PKEY_CTX_free(pkey_ctx); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + }; /* - * If everything written generate master key: no need to save PMS as - * SRP_generate_client_master_secret generates it internally. + * If we have client certificate, use its secret as peer key */ - if (n > 0) { - if ((s->session->master_key_length = - SRP_generate_client_master_secret(s, - s->session->master_key)) < - 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto err; + if (s->s3->tmp.cert_req && s->cert->key->privatekey) { + if (EVP_PKEY_derive_set_peer + (pkey_ctx, s->cert->key->privatekey) <= 0) { + /* + * If there was an error - just ignore it. Ephemeral key + * * would be used + */ + ERR_clear_error(); } } - } else -#endif - /* If we haven't written everything save PMS */ - if (n <= 0) { - s->s3->tmp.pms = pms; - s->s3->tmp.pmslen = pmslen; - } else { - /* If we don't have a PMS restore */ - if (pms == NULL) { - pms = s->s3->tmp.pms; - pmslen = s->s3->tmp.pmslen; + /* + * Compute shared IV and store it in algorithm-specific context + * data + */ + ukm_hash = EVP_MD_CTX_create(); + EVP_DigestInit(ukm_hash, + EVP_get_digestbynid(NID_id_GostR3411_94)); + EVP_DigestUpdate(ukm_hash, s->s3->client_random, + SSL3_RANDOM_SIZE); + EVP_DigestUpdate(ukm_hash, s->s3->server_random, + SSL3_RANDOM_SIZE); + EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); + EVP_MD_CTX_destroy(ukm_hash); + if (EVP_PKEY_CTX_ctrl + (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, + shared_ukm) < 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_LIBRARY_BUG); + goto err; } - if (pms == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + /* Make GOST keytransport blob message */ + /* + * Encapsulate it into sequence + */ + *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; + msglen = 255; + if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + SSL_R_LIBRARY_BUG); goto err; } - s->session->master_key_length = - s->method->ssl3_enc->generate_master_secret(s, - s-> - session->master_key, - pms, pmslen); - OPENSSL_clear_free(pms, pmslen); - s->s3->tmp.pms = NULL; - if (s->session->master_key_length < 0) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + if (msglen >= 0x80) { + *(p++) = 0x81; + *(p++) = msglen & 0xff; + n = msglen + 3; + } else { + *(p++) = msglen & 0xff; + n = msglen + 2; + } + memcpy(p, tmp, msglen); + /* Check if pubkey from client certificate was used */ + if (EVP_PKEY_CTX_ctrl + (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { + /* Set flag "skip certificate verify" */ + s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; + } + EVP_PKEY_CTX_free(pkey_ctx); + EVP_PKEY_free(pub_key); + + } +#ifndef OPENSSL_NO_SRP + else if (alg_k & SSL_kSRP) { + if (s->srp_ctx.A != NULL) { + /* send off the data */ + n = BN_num_bytes(s->srp_ctx.A); + s2n(n, p); + BN_bn2bin(s->srp_ctx.A, p); + n += 2; + } else { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_INTERNAL_ERROR); + goto err; + } + OPENSSL_free(s->session->srp_username); + s->session->srp_username = BUF_strdup(s->srp_ctx.login); + if (s->session->srp_username == NULL) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, + ERR_R_MALLOC_FAILURE); goto err; } } - return n; +#endif + else { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; + } + +#ifndef OPENSSL_NO_PSK + n += pskhdrlen; +#endif + + if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); + goto err; + } + + s->s3->tmp.pms = pms; + s->s3->tmp.pmslen = pmslen; + + return 1; memerr: ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); err: OPENSSL_clear_free(pms, pmslen); s->s3->tmp.pms = NULL; @@ -3015,11 +2992,68 @@ int ssl3_send_client_key_exchange(SSL *s) EC_KEY_free(clnt_ecdh); EVP_PKEY_free(srvr_pub_pkey); #endif - s->state = SSL_ST_ERR; - return (-1); +#ifndef OPENSSL_NO_PSK + OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); + s->s3->tmp.psk = NULL; +#endif + statem_set_error(s); + return 0; +} + +int tls_client_key_exchange_post_work(SSL *s) +{ + unsigned char *pms = NULL; + size_t pmslen = 0; + +#ifndef OPENSSL_NO_SRP + /* Check for SRP */ + if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { + if (!srp_generate_client_master_secret(s)) { + SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, + ERR_R_INTERNAL_ERROR); + goto err; + } + return 1; + } +#endif + pms = s->s3->tmp.pms; + pmslen = s->s3->tmp.pmslen; + + if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); + goto err; + } + if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); + goto err; + } + return 1; + err: + OPENSSL_clear_free(pms, pmslen); + s->s3->tmp.pms = NULL; + return 0; } int ssl3_send_client_verify(SSL *s) +{ + if (s->state == SSL3_ST_CW_CERT_VRFY_A) { + if(tls_construct_client_verify(s) == 0) + goto err; + + s->state = SSL3_ST_CW_CERT_VRFY_B; + } + + /* SSL3_ST_CW_CERT_VRFY_B */ + return ssl_do_write(s); + err: + s->state = SSL_ST_ERR; + return -1; + +} + +int tls_construct_client_verify(SSL *s) { unsigned char *p; unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; @@ -3032,131 +3066,120 @@ int ssl3_send_client_verify(SSL *s) EVP_MD_CTX_init(&mctx); - if (s->state == SSL3_ST_CW_CERT_VRFY_A) { - p = ssl_handshake_start(s); - pkey = s->cert->key->privatekey; + p = ssl_handshake_start(s); + pkey = s->cert->key->privatekey; /* Create context from key and test if sha1 is allowed as digest */ - pctx = EVP_PKEY_CTX_new(pkey, NULL); - EVP_PKEY_sign_init(pctx); - if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { - if (!SSL_USE_SIGALGS(s)) - s->method->ssl3_enc->cert_verify_mac(s, - NID_sha1, - &(data - [MD5_DIGEST_LENGTH])); - } else { - ERR_clear_error(); + pctx = EVP_PKEY_CTX_new(pkey, NULL); + EVP_PKEY_sign_init(pctx); + if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { + if (!SSL_USE_SIGALGS(s)) + s->method->ssl3_enc->cert_verify_mac(s, + NID_sha1, + &(data + [MD5_DIGEST_LENGTH])); + } else { + ERR_clear_error(); + } + /* + * For TLS v1.2 send signature algorithm and signature using agreed + * digest and cached handshake records. + */ + if (SSL_USE_SIGALGS(s)) { + long hdatalen = 0; + void *hdata; + const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; + hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); + if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); + goto err; } - /* - * For TLS v1.2 send signature algorithm and signature using agreed - * digest and cached handshake records. - */ - if (SSL_USE_SIGALGS(s)) { - long hdatalen = 0; - void *hdata; - const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; - hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); - if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); - goto err; - } - p += 2; + p += 2; #ifdef SSL_DEBUG - fprintf(stderr, "Using TLS 1.2 with client alg %s\n", - EVP_MD_name(md)); + fprintf(stderr, "Using TLS 1.2 with client alg %s\n", + EVP_MD_name(md)); #endif - if (!EVP_SignInit_ex(&mctx, md, NULL) - || !EVP_SignUpdate(&mctx, hdata, hdatalen) - || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); - goto err; - } - s2n(u, p); - n = u + 4; - /* - * For extended master secret we've already digested cached - * records. - */ - if (s->session->flags & SSL_SESS_FLAG_EXTMS) { - BIO_free(s->s3->handshake_buffer); - s->s3->handshake_buffer = NULL; - s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE; - } else if (!ssl3_digest_cached_records(s)) - goto err; - } else + if (!EVP_SignInit_ex(&mctx, md, NULL) + || !EVP_SignUpdate(&mctx, hdata, hdatalen) + || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); + goto err; + } + s2n(u, p); + n = u + 4; + /* Digest cached records and discard handshake buffer */ + if (!ssl3_digest_cached_records(s, 0)) + goto err; + } else #ifndef OPENSSL_NO_RSA - if (pkey->type == EVP_PKEY_RSA) { - s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); - if (RSA_sign(NID_md5_sha1, data, - MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, - &(p[2]), &u, pkey->pkey.rsa) <= 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); - goto err; - } - s2n(u, p); - n = u + 2; - } else + if (pkey->type == EVP_PKEY_RSA) { + s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); + if (RSA_sign(NID_md5_sha1, data, + MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, + &(p[2]), &u, pkey->pkey.rsa) <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB); + goto err; + } + s2n(u, p); + n = u + 2; + } else #endif #ifndef OPENSSL_NO_DSA - if (pkey->type == EVP_PKEY_DSA) { - if (!DSA_sign(pkey->save_type, - &(data[MD5_DIGEST_LENGTH]), - SHA_DIGEST_LENGTH, &(p[2]), - (unsigned int *)&j, pkey->pkey.dsa)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); - goto err; - } - s2n(j, p); - n = j + 2; - } else + if (pkey->type == EVP_PKEY_DSA) { + if (!DSA_sign(pkey->save_type, + &(data[MD5_DIGEST_LENGTH]), + SHA_DIGEST_LENGTH, &(p[2]), + (unsigned int *)&j, pkey->pkey.dsa)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB); + goto err; + } + s2n(j, p); + n = j + 2; + } else #endif #ifndef OPENSSL_NO_EC - if (pkey->type == EVP_PKEY_EC) { - if (!ECDSA_sign(pkey->save_type, - &(data[MD5_DIGEST_LENGTH]), - SHA_DIGEST_LENGTH, &(p[2]), - (unsigned int *)&j, pkey->pkey.ec)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); - goto err; - } - s2n(j, p); - n = j + 2; - } else -#endif - if (pkey->type == NID_id_GostR3410_94 - || pkey->type == NID_id_GostR3410_2001) { - unsigned char signbuf[64]; - int i; - size_t sigsize = 64; - s->method->ssl3_enc->cert_verify_mac(s, - NID_id_GostR3411_94, data); - if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); - goto err; - } - for (i = 63, j = 0; i >= 0; j++, i--) { - p[2 + j] = signbuf[i]; - } - s2n(j, p); - n = j + 2; - } else { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); + if (pkey->type == EVP_PKEY_EC) { + if (!ECDSA_sign(pkey->save_type, + &(data[MD5_DIGEST_LENGTH]), + SHA_DIGEST_LENGTH, &(p[2]), + (unsigned int *)&j, pkey->pkey.ec)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB); goto err; } - if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); + s2n(j, p); + n = j + 2; + } else +#endif + if (pkey->type == NID_id_GostR3410_2001) { + unsigned char signbuf[64]; + int i; + size_t sigsize = 64; + s->method->ssl3_enc->cert_verify_mac(s, + NID_id_GostR3411_94, data); + if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); goto err; } - s->state = SSL3_ST_CW_CERT_VRFY_B; + for (i = 63, j = 0; i >= 0; j++, i--) { + p[2 + j] = signbuf[i]; + } + s2n(j, p); + n = j + 2; + } else { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); + goto err; + } + if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); + goto err; } + EVP_MD_CTX_cleanup(&mctx); EVP_PKEY_CTX_free(pctx); - return ssl_do_write(s); + return 1; err: EVP_MD_CTX_cleanup(&mctx); EVP_PKEY_CTX_free(pctx); - s->state = SSL_ST_ERR; - return (-1); + return 0; } /* @@ -3182,15 +3205,14 @@ static int ssl3_check_client_certificate(SSL *s) alg_k = s->s3->tmp.new_cipher->algorithm_mkey; /* See if we can use client certificate for fixed DH */ if (alg_k & (SSL_kDHr | SSL_kDHd)) { - SESS_CERT *scert = s->session->sess_cert; - int i = scert->peer_cert_type; + int i = s->session->peer_type; EVP_PKEY *clkey = NULL, *spkey = NULL; clkey = s->cert->key->privatekey; /* If client key not DH assume it can be used */ if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) return 1; if (i >= 0) - spkey = X509_get_pubkey(scert->peer_pkeys[i].x509); + spkey = X509_get_pubkey(s->session->peer); if (spkey) { /* Compare server and client parameters */ i = EVP_PKEY_cmp_parameters(clkey, spkey); @@ -3203,53 +3225,95 @@ static int ssl3_check_client_certificate(SSL *s) return 1; } + int ssl3_send_client_certificate(SSL *s) +{ + enum WORK_STATE wst; + + if (s->state == SSL3_ST_CW_CERT_A || s->state == SSL3_ST_CW_CERT_B) { + if (s->state == SSL3_ST_CW_CERT_A) + wst = tls_prepare_client_certificate(s, WORK_MORE_A); + else + wst = tls_prepare_client_certificate(s, WORK_MORE_B); + if (wst == WORK_ERROR) + goto err; + if (wst == WORK_MORE_A) + return -1; + if (wst == WORK_MORE_B) { + s->state = SSL3_ST_CW_CERT_B; + return -1; + } + + s->state = SSL3_ST_CW_CERT_C; + } + + if (s->state == SSL3_ST_CW_CERT_B) { + wst = tls_prepare_client_certificate(s, WORK_MORE_B); + if (wst == WORK_ERROR) + goto err; + if (wst == WORK_MORE_A) + return -1; + + /* Skip state C...it was entirely temporary in the original code */ + s->state = SSL3_ST_CW_CERT_D; + } + + if (tls_construct_client_certificate(s) == 0) + goto err; + + return ssl_do_write(s); + err: + s->state = SSL_ST_ERR; + return -1; + +} + +enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst) { X509 *x509 = NULL; EVP_PKEY *pkey = NULL; int i; - if (s->state == SSL3_ST_CW_CERT_A) { + if (wst == WORK_MORE_A) { /* Let cert callback update client certificates if required */ if (s->cert->cert_cb) { i = s->cert->cert_cb(s, s->cert->cert_cb_arg); if (i < 0) { s->rwstate = SSL_X509_LOOKUP; - return -1; + return WORK_MORE_A; } if (i == 0) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - s->state = SSL_ST_ERR; + statem_set_error(s); return 0; } s->rwstate = SSL_NOTHING; } if (ssl3_check_client_certificate(s)) - s->state = SSL3_ST_CW_CERT_C; - else - s->state = SSL3_ST_CW_CERT_B; + return WORK_FINISHED_CONTINUE; + + /* Fall through to WORK_MORE_B */ + wst = WORK_MORE_B; } /* We need to get a client cert */ - if (s->state == SSL3_ST_CW_CERT_B) { + if (wst == WORK_MORE_B) { /* * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; * return(-1); We then get retied later */ - i = 0; i = ssl_do_client_cert_cb(s, &x509, &pkey); if (i < 0) { s->rwstate = SSL_X509_LOOKUP; - return (-1); + return WORK_MORE_B; } s->rwstate = SSL_NOTHING; if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { - s->state = SSL3_ST_CW_CERT_B; if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) i = 0; } else if (i == 1) { i = 0; - SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, + SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); } @@ -3261,34 +3325,36 @@ int ssl3_send_client_certificate(SSL *s) if (s->version == SSL3_VERSION) { s->s3->tmp.cert_req = 0; ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); - return (1); + return WORK_FINISHED_CONTINUE; } else { s->s3->tmp.cert_req = 2; - if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) { + if (!ssl3_digest_cached_records(s, 0)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - s->state = SSL_ST_ERR; + statem_set_error(s); return 0; } } } - /* Ok, we have a cert */ - s->state = SSL3_ST_CW_CERT_C; + return WORK_FINISHED_CONTINUE; } - if (s->state == SSL3_ST_CW_CERT_C) { - s->state = SSL3_ST_CW_CERT_D; - if (!ssl3_output_cert_chain(s, - (s->s3->tmp.cert_req == - 2) ? NULL : s->cert->key)) { - SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); - s->state = SSL_ST_ERR; - return 0; - } + /* Shouldn't ever get here */ + return WORK_ERROR; +} + +int tls_construct_client_certificate(SSL *s) +{ + if (!ssl3_output_cert_chain(s, + (s->s3->tmp.cert_req == + 2) ? NULL : s->cert->key)) { + SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); + ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); + statem_set_error(s); + return 0; } - /* SSL3_ST_CW_CERT_D */ - return ssl_do_write(s); + + return 1; } #define has_bits(i,m) (((i)&(m)) == (m)) @@ -3299,13 +3365,13 @@ int ssl3_check_cert_and_algorithm(SSL *s) long alg_k, alg_a; EVP_PKEY *pkey = NULL; int pkey_bits; - SESS_CERT *sc; #ifndef OPENSSL_NO_RSA RSA *rsa; #endif #ifndef OPENSSL_NO_DH DH *dh; #endif + int al = SSL_AD_HANDSHAKE_FAILURE; alg_k = s->s3->tmp.new_cipher->algorithm_mkey; alg_a = s->s3->tmp.new_cipher->algorithm_auth; @@ -3313,25 +3379,19 @@ int ssl3_check_cert_and_algorithm(SSL *s) /* we don't have a certificate */ if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) return (1); - - sc = s->session->sess_cert; - if (sc == NULL) { - SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); - goto err; - } #ifndef OPENSSL_NO_RSA - rsa = s->session->sess_cert->peer_rsa_tmp; + rsa = s->s3->peer_rsa_tmp; #endif #ifndef OPENSSL_NO_DH - dh = s->session->sess_cert->peer_dh_tmp; + dh = s->s3->peer_dh_tmp; #endif /* This is the passed certificate */ - idx = sc->peer_cert_type; + idx = s->session->peer_type; #ifndef OPENSSL_NO_EC if (idx == SSL_PKEY_ECC) { - if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) { + if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { /* check failed */ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); goto f_err; @@ -3347,9 +3407,9 @@ int ssl3_check_cert_and_algorithm(SSL *s) goto f_err; } #endif - pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); + pkey = X509_get_pubkey(s->session->peer); pkey_bits = EVP_PKEY_bits(pkey); - i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); + i = X509_certificate_type(s->session->peer, pkey); EVP_PKEY_free(pkey); /* Check that we have a certificate if we require one */ @@ -3366,17 +3426,33 @@ int ssl3_check_cert_and_algorithm(SSL *s) } #endif #ifndef OPENSSL_NO_RSA - if ((alg_k & SSL_kRSA) && - !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) { - SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, - SSL_R_MISSING_RSA_ENCRYPTING_CERT); - goto f_err; + if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { + if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && + !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, + SSL_R_MISSING_RSA_ENCRYPTING_CERT); + goto f_err; + } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { + if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { + if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, + SSL_R_MISSING_RSA_ENCRYPTING_CERT); + goto f_err; + } + if (rsa != NULL) { + /* server key exchange is not allowed. */ + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); + goto f_err; + } + } + } } #endif #ifndef OPENSSL_NO_DH - if ((alg_k & SSL_kDHE) && - !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) { - SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY); + if ((alg_k & SSL_kDHE) && (dh == NULL)) { + al = SSL_AD_INTERNAL_ERROR; + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); goto f_err; } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { @@ -3398,9 +3474,14 @@ int ssl3_check_cert_and_algorithm(SSL *s) pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { #ifndef OPENSSL_NO_RSA if (alg_k & SSL_kRSA) { - if (rsa == NULL - || RSA_size(rsa) * 8 > + if (rsa == NULL) { + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, + SSL_R_MISSING_EXPORT_TMP_RSA_KEY); + goto f_err; + } else if (RSA_bits(rsa) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { + /* We have a temporary RSA key but it's too large. */ + al = SSL_AD_EXPORT_RESTRICTION; SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_EXPORT_TMP_RSA_KEY); goto f_err; @@ -3408,14 +3489,21 @@ int ssl3_check_cert_and_algorithm(SSL *s) } else #endif #ifndef OPENSSL_NO_DH - if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) { - if (dh == NULL - || DH_size(dh) * 8 > + if (alg_k & SSL_kDHE) { + if (DH_bits(dh) > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { + /* We have a temporary DH key but it's too large. */ + al = SSL_AD_EXPORT_RESTRICTION; SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_EXPORT_TMP_DH_KEY); goto f_err; } + } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { + /* The cert should have had an export DH key. */ + al = SSL_AD_EXPORT_RESTRICTION; + SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, + SSL_R_MISSING_EXPORT_TMP_DH_KEY); + goto f_err; } else #endif { @@ -3426,8 +3514,7 @@ int ssl3_check_cert_and_algorithm(SSL *s) } return (1); f_err: - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - err: + ssl3_send_alert(s, SSL3_AL_FATAL, al); return (0); } @@ -3436,11 +3523,16 @@ int ssl3_check_cert_and_algorithm(SSL *s) * the session ID. EAP-FAST (RFC 4851), however, relies on the next server * message after the ServerHello to determine if the server is resuming. * Therefore, we allow EAP-FAST to peek ahead. - * ssl3_check_finished returns 1 if we are resuming from an external - * pre-shared secret, we have a "ticket" and the next server handshake message - * is Finished; and 0 otherwise. It returns -1 upon an error. + * ssl3_check_change returns 1 if we are resuming from an external + * pre-shared secret, we have a "ticket" and the next server message + * is CCS; and 0 otherwise. It returns -1 upon an error. */ -static int ssl3_check_finished(SSL *s) + #if 0 + /* + * TODO: No longer required. Temporarily kept during state machine development + * To be deleted by later commits + */ +static int ssl3_check_change(SSL *s) { int ok = 0; @@ -3448,8 +3540,6 @@ static int ssl3_check_finished(SSL *s) !s->session->tlsext_tick) return 0; - /* Need to permit this temporarily, in case the next message is Finished. */ - s->s3->flags |= SSL3_FLAGS_CCS_OK; /* * This function is called when we might get a Certificate message instead, * so permit appropriate message length. @@ -3460,49 +3550,52 @@ static int ssl3_check_finished(SSL *s) SSL3_ST_CR_CERT_A, SSL3_ST_CR_CERT_B, -1, s->max_cert_list, &ok); - s->s3->flags &= ~SSL3_FLAGS_CCS_OK; if (!ok) return -1; s->s3->tmp.reuse_message = 1; - if (s->s3->tmp.message_type == SSL3_MT_FINISHED) + if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) return 1; - /* If we're not done, then the CCS arrived early and we should bail. */ - if (s->s3->change_cipher_spec) { - SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); - return -1; - } - return 0; } +#endif #ifndef OPENSSL_NO_NEXTPROTONEG int ssl3_send_next_proto(SSL *s) { - unsigned int len, padding_len; - unsigned char *d; - if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { - len = s->next_proto_negotiated_len; - padding_len = 32 - ((len + 2) % 32); - d = (unsigned char *)s->init_buf->data; - d[4] = len; - memcpy(d + 5, s->next_proto_negotiated, len); - d[5 + len] = padding_len; - memset(d + 6 + len, 0, padding_len); - *(d++) = SSL3_MT_NEXT_PROTO; - l2n3(2 + len + padding_len, d); + if (tls_construct_next_proto(s) == 0) { + s->state = SSL_ST_ERR; + return -1; + } s->state = SSL3_ST_CW_NEXT_PROTO_B; - s->init_num = 4 + 2 + len + padding_len; - s->init_off = 0; } return ssl3_do_write(s, SSL3_RT_HANDSHAKE); } + +int tls_construct_next_proto(SSL *s) +{ + unsigned int len, padding_len; + unsigned char *d; + + len = s->next_proto_negotiated_len; + padding_len = 32 - ((len + 2) % 32); + d = (unsigned char *)s->init_buf->data; + d[4] = len; + memcpy(d + 5, s->next_proto_negotiated, len); + d[5 + len] = padding_len; + memset(d + 6 + len, 0, padding_len); + *(d++) = SSL3_MT_NEXT_PROTO; + l2n3(2 + len + padding_len, d); + s->init_num = 4 + 2 + len + padding_len; + s->init_off = 0; + + return 1; +} #endif int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) @@ -3523,9 +3616,7 @@ int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) } int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, - unsigned char *p, - int (*put_cb) (const SSL_CIPHER *, - unsigned char *)) + unsigned char *p) { int i, j = 0; SSL_CIPHER *c; @@ -3537,8 +3628,6 @@ int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, 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); @@ -3553,7 +3642,7 @@ int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, empty_reneg_info_scsv = 0; } #endif - j = put_cb(c, p); + j = s->method->put_cipher_by_char(c, p); p += j; } /* @@ -3565,7 +3654,7 @@ int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, static SSL_CIPHER scsv = { 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; - j = put_cb(&scsv, p); + j = s->method->put_cipher_by_char(&scsv, p); p += j; #ifdef OPENSSL_RI_DEBUG fprintf(stderr, @@ -3576,7 +3665,7 @@ int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, static SSL_CIPHER scsv = { 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; - j = put_cb(&scsv, p); + j = s->method->put_cipher_by_char(&scsv, p); p += j; } }