From e2496982472bdf233be95c5ea72d1c4dc6c91db3 Mon Sep 17 00:00:00 2001 From: cvs2svn Date: Sun, 23 Apr 2023 13:43:47 +0000 Subject: This commit was manufactured by cvs2git to create tag 'tb_20230422'. --- src/lib/libssl/ssl_clnt.c | 2674 --------------------------------------------- 1 file changed, 2674 deletions(-) delete mode 100644 src/lib/libssl/ssl_clnt.c (limited to 'src/lib/libssl/ssl_clnt.c') diff --git a/src/lib/libssl/ssl_clnt.c b/src/lib/libssl/ssl_clnt.c deleted file mode 100644 index c721aede4e..0000000000 --- a/src/lib/libssl/ssl_clnt.c +++ /dev/null @@ -1,2674 +0,0 @@ -/* $OpenBSD: ssl_clnt.c,v 1.158 2022/12/26 07:31:44 jmc Exp $ */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ -/* ==================================================================== - * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * openssl-core@openssl.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ -/* ==================================================================== - * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. - * - * Portions of the attached software ("Contribution") are developed by - * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. - * - * The Contribution is licensed pursuant to the OpenSSL open source - * license provided above. - * - * ECC cipher suite support in OpenSSL originally written by - * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. - * - */ -/* ==================================================================== - * Copyright 2005 Nokia. All rights reserved. - * - * The portions of the attached software ("Contribution") is developed by - * Nokia Corporation and is licensed pursuant to the OpenSSL open source - * license. - * - * The Contribution, originally written by Mika Kousa and Pasi Eronen of - * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites - * support (see RFC 4279) to OpenSSL. - * - * No patent licenses or other rights except those expressly stated in - * the OpenSSL open source license shall be deemed granted or received - * expressly, by implication, estoppel, or otherwise. - * - * No assurances are provided by Nokia that the Contribution does not - * infringe the patent or other intellectual property rights of any third - * party or that the license provides you with all the necessary rights - * to make use of the Contribution. - * - * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN - * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA - * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY - * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR - * OTHERWISE. - */ - -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include -#include - -#ifndef OPENSSL_NO_ENGINE -#include -#endif -#ifndef OPENSSL_NO_GOST -#include -#endif - -#include "bytestring.h" -#include "dtls_local.h" -#include "ssl_local.h" -#include "ssl_sigalgs.h" -#include "ssl_tlsext.h" - -static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b); - -static int ssl3_send_client_hello(SSL *s); -static int ssl3_get_dtls_hello_verify(SSL *s); -static int ssl3_get_server_hello(SSL *s); -static int ssl3_get_certificate_request(SSL *s); -static int ssl3_get_new_session_ticket(SSL *s); -static int ssl3_get_cert_status(SSL *s); -static int ssl3_get_server_done(SSL *s); -static int ssl3_send_client_verify(SSL *s); -static int ssl3_send_client_certificate(SSL *s); -static int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey); -static int ssl3_send_client_key_exchange(SSL *s); -static int ssl3_get_server_key_exchange(SSL *s); -static int ssl3_get_server_certificate(SSL *s); -static int ssl3_check_cert_and_algorithm(SSL *s); -static int ssl3_check_finished(SSL *s); -static int ssl3_send_client_change_cipher_spec(SSL *s); -static int ssl3_send_client_finished(SSL *s); -static int ssl3_get_server_finished(SSL *s); - -int -ssl3_connect(SSL *s) -{ - int new_state, state, skip = 0; - int ret = -1; - - ERR_clear_error(); - errno = 0; - - s->in_handshake++; - if (!SSL_in_init(s) || SSL_in_before(s)) - SSL_clear(s); - - for (;;) { - state = s->s3->hs.state; - - switch (s->s3->hs.state) { - case SSL_ST_RENEGOTIATE: - s->renegotiate = 1; - s->s3->hs.state = SSL_ST_CONNECT; - s->ctx->stats.sess_connect_renegotiate++; - /* break */ - case SSL_ST_BEFORE: - case SSL_ST_CONNECT: - case SSL_ST_BEFORE|SSL_ST_CONNECT: - case SSL_ST_OK|SSL_ST_CONNECT: - - s->server = 0; - - ssl_info_callback(s, SSL_CB_HANDSHAKE_START, 1); - - if (!ssl_legacy_stack_version(s, s->version)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - ret = -1; - goto end; - } - - if (!ssl_supported_tls_version_range(s, - &s->s3->hs.our_min_tls_version, - &s->s3->hs.our_max_tls_version)) { - SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE); - ret = -1; - goto end; - } - - if (!ssl_security_version(s, - s->s3->hs.our_min_tls_version)) { - SSLerror(s, SSL_R_VERSION_TOO_LOW); - ret = -1; - goto end; - } - - if (!ssl3_setup_init_buffer(s)) { - ret = -1; - goto end; - } - if (!ssl3_setup_buffers(s)) { - ret = -1; - goto end; - } - if (!ssl_init_wbio_buffer(s, 0)) { - ret = -1; - goto end; - } - - /* don't push the buffering BIO quite yet */ - - if (!tls1_transcript_init(s)) { - ret = -1; - goto end; - } - - s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_A; - s->ctx->stats.sess_connect++; - s->init_num = 0; - - if (SSL_is_dtls(s)) { - /* mark client_random uninitialized */ - memset(s->s3->client_random, 0, - sizeof(s->s3->client_random)); - s->d1->send_cookie = 0; - s->hit = 0; - } - break; - - case SSL3_ST_CW_CLNT_HELLO_A: - case SSL3_ST_CW_CLNT_HELLO_B: - s->shutdown = 0; - - if (SSL_is_dtls(s)) { - /* every DTLS ClientHello resets Finished MAC */ - tls1_transcript_reset(s); - - dtls1_start_timer(s); - } - - ret = ssl3_send_client_hello(s); - if (ret <= 0) - goto end; - - if (SSL_is_dtls(s) && s->d1->send_cookie) { - s->s3->hs.state = SSL3_ST_CW_FLUSH; - s->s3->hs.tls12.next_state = SSL3_ST_CR_SRVR_HELLO_A; - } else - s->s3->hs.state = SSL3_ST_CR_SRVR_HELLO_A; - - s->init_num = 0; - - /* turn on buffering for the next lot of output */ - if (s->bbio != s->wbio) - s->wbio = BIO_push(s->bbio, s->wbio); - - break; - - case SSL3_ST_CR_SRVR_HELLO_A: - case SSL3_ST_CR_SRVR_HELLO_B: - ret = ssl3_get_server_hello(s); - if (ret <= 0) - goto end; - - if (s->hit) { - s->s3->hs.state = SSL3_ST_CR_FINISHED_A; - if (!SSL_is_dtls(s)) { - if (s->tlsext_ticket_expected) { - /* receive renewed session ticket */ - s->s3->hs.state = SSL3_ST_CR_SESSION_TICKET_A; - } - - /* No client certificate verification. */ - tls1_transcript_free(s); - } - } else if (SSL_is_dtls(s)) { - s->s3->hs.state = DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A; - } else { - s->s3->hs.state = SSL3_ST_CR_CERT_A; - } - s->init_num = 0; - break; - - case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A: - case DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B: - ret = ssl3_get_dtls_hello_verify(s); - if (ret <= 0) - goto end; - dtls1_stop_timer(s); - if (s->d1->send_cookie) /* start again, with a cookie */ - s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_A; - else - s->s3->hs.state = SSL3_ST_CR_CERT_A; - s->init_num = 0; - break; - - case SSL3_ST_CR_CERT_A: - case SSL3_ST_CR_CERT_B: - ret = ssl3_check_finished(s); - if (ret <= 0) - goto end; - if (ret == 2) { - s->hit = 1; - if (s->tlsext_ticket_expected) - s->s3->hs.state = SSL3_ST_CR_SESSION_TICKET_A; - else - s->s3->hs.state = SSL3_ST_CR_FINISHED_A; - s->init_num = 0; - break; - } - /* Check if it is anon DH/ECDH. */ - if (!(s->s3->hs.cipher->algorithm_auth & - SSL_aNULL)) { - ret = ssl3_get_server_certificate(s); - if (ret <= 0) - goto end; - if (s->tlsext_status_expected) - s->s3->hs.state = SSL3_ST_CR_CERT_STATUS_A; - else - s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A; - } else { - skip = 1; - s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A; - } - s->init_num = 0; - break; - - case SSL3_ST_CR_KEY_EXCH_A: - case SSL3_ST_CR_KEY_EXCH_B: - ret = ssl3_get_server_key_exchange(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CR_CERT_REQ_A; - s->init_num = 0; - - /* - * At this point we check that we have the - * required stuff from the server. - */ - if (!ssl3_check_cert_and_algorithm(s)) { - ret = -1; - goto end; - } - break; - - case SSL3_ST_CR_CERT_REQ_A: - case SSL3_ST_CR_CERT_REQ_B: - ret = ssl3_get_certificate_request(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CR_SRVR_DONE_A; - s->init_num = 0; - break; - - case SSL3_ST_CR_SRVR_DONE_A: - case SSL3_ST_CR_SRVR_DONE_B: - ret = ssl3_get_server_done(s); - if (ret <= 0) - goto end; - if (SSL_is_dtls(s)) - dtls1_stop_timer(s); - if (s->s3->hs.tls12.cert_request) - s->s3->hs.state = SSL3_ST_CW_CERT_A; - else - s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_A; - s->init_num = 0; - - break; - - case SSL3_ST_CW_CERT_A: - case SSL3_ST_CW_CERT_B: - case SSL3_ST_CW_CERT_C: - case SSL3_ST_CW_CERT_D: - if (SSL_is_dtls(s)) - dtls1_start_timer(s); - ret = ssl3_send_client_certificate(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_A; - s->init_num = 0; - break; - - case SSL3_ST_CW_KEY_EXCH_A: - case SSL3_ST_CW_KEY_EXCH_B: - if (SSL_is_dtls(s)) - dtls1_start_timer(s); - ret = ssl3_send_client_key_exchange(s); - if (ret <= 0) - goto end; - /* - * EAY EAY EAY need to check for DH fix cert - * sent back - */ - /* - * For TLS, cert_req is set to 2, so a cert chain - * of nothing is sent, but no verify packet is sent - */ - /* - * XXX: For now, we do not support client - * authentication in ECDH cipher suites with - * ECDH (rather than ECDSA) certificates. - * We need to skip the certificate verify - * message when client's ECDH public key is sent - * inside the client certificate. - */ - if (s->s3->hs.tls12.cert_request == 1) { - s->s3->hs.state = SSL3_ST_CW_CERT_VRFY_A; - } else { - s->s3->hs.state = SSL3_ST_CW_CHANGE_A; - s->s3->change_cipher_spec = 0; - } - if (!SSL_is_dtls(s)) { - if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { - s->s3->hs.state = SSL3_ST_CW_CHANGE_A; - s->s3->change_cipher_spec = 0; - } - } - - s->init_num = 0; - break; - - case SSL3_ST_CW_CERT_VRFY_A: - case SSL3_ST_CW_CERT_VRFY_B: - if (SSL_is_dtls(s)) - dtls1_start_timer(s); - ret = ssl3_send_client_verify(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CW_CHANGE_A; - s->init_num = 0; - s->s3->change_cipher_spec = 0; - break; - - case SSL3_ST_CW_CHANGE_A: - case SSL3_ST_CW_CHANGE_B: - if (SSL_is_dtls(s) && !s->hit) - dtls1_start_timer(s); - ret = ssl3_send_client_change_cipher_spec(s); - if (ret <= 0) - goto end; - - s->s3->hs.state = SSL3_ST_CW_FINISHED_A; - s->init_num = 0; - s->session->cipher = s->s3->hs.cipher; - - if (!tls1_setup_key_block(s)) { - ret = -1; - goto end; - } - if (!tls1_change_write_cipher_state(s)) { - ret = -1; - goto end; - } - break; - - case SSL3_ST_CW_FINISHED_A: - case SSL3_ST_CW_FINISHED_B: - if (SSL_is_dtls(s) && !s->hit) - dtls1_start_timer(s); - ret = ssl3_send_client_finished(s); - if (ret <= 0) - goto end; - if (!SSL_is_dtls(s)) - s->s3->flags |= SSL3_FLAGS_CCS_OK; - s->s3->hs.state = SSL3_ST_CW_FLUSH; - - /* clear flags */ - if (s->hit) { - s->s3->hs.tls12.next_state = SSL_ST_OK; - } else { - /* Allow NewSessionTicket if ticket expected */ - if (s->tlsext_ticket_expected) - s->s3->hs.tls12.next_state = - SSL3_ST_CR_SESSION_TICKET_A; - else - s->s3->hs.tls12.next_state = - SSL3_ST_CR_FINISHED_A; - } - s->init_num = 0; - break; - - case SSL3_ST_CR_SESSION_TICKET_A: - case SSL3_ST_CR_SESSION_TICKET_B: - ret = ssl3_get_new_session_ticket(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CR_FINISHED_A; - s->init_num = 0; - break; - - case SSL3_ST_CR_CERT_STATUS_A: - case SSL3_ST_CR_CERT_STATUS_B: - ret = ssl3_get_cert_status(s); - if (ret <= 0) - goto end; - s->s3->hs.state = SSL3_ST_CR_KEY_EXCH_A; - s->init_num = 0; - break; - - case SSL3_ST_CR_FINISHED_A: - case SSL3_ST_CR_FINISHED_B: - if (SSL_is_dtls(s)) - s->d1->change_cipher_spec_ok = 1; - else - s->s3->flags |= SSL3_FLAGS_CCS_OK; - ret = ssl3_get_server_finished(s); - if (ret <= 0) - goto end; - if (SSL_is_dtls(s)) - dtls1_stop_timer(s); - - if (s->hit) - s->s3->hs.state = SSL3_ST_CW_CHANGE_A; - else - s->s3->hs.state = SSL_ST_OK; - s->init_num = 0; - break; - - case SSL3_ST_CW_FLUSH: - s->rwstate = SSL_WRITING; - if (BIO_flush(s->wbio) <= 0) { - if (SSL_is_dtls(s)) { - /* If the write error was fatal, stop trying */ - if (!BIO_should_retry(s->wbio)) { - s->rwstate = SSL_NOTHING; - s->s3->hs.state = s->s3->hs.tls12.next_state; - } - } - ret = -1; - goto end; - } - s->rwstate = SSL_NOTHING; - s->s3->hs.state = s->s3->hs.tls12.next_state; - break; - - case SSL_ST_OK: - /* clean a few things up */ - tls1_cleanup_key_block(s); - - if (s->s3->handshake_transcript != NULL) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - ret = -1; - goto end; - } - - if (!SSL_is_dtls(s)) - ssl3_release_init_buffer(s); - - ssl_free_wbio_buffer(s); - - s->init_num = 0; - s->renegotiate = 0; - s->new_session = 0; - - ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); - if (s->hit) - s->ctx->stats.sess_hit++; - - ret = 1; - /* s->server=0; */ - s->handshake_func = ssl3_connect; - s->ctx->stats.sess_connect_good++; - - ssl_info_callback(s, SSL_CB_HANDSHAKE_DONE, 1); - - if (SSL_is_dtls(s)) { - /* done with handshaking */ - s->d1->handshake_read_seq = 0; - s->d1->next_handshake_write_seq = 0; - } - - goto end; - /* break; */ - - default: - SSLerror(s, SSL_R_UNKNOWN_STATE); - ret = -1; - goto end; - /* break; */ - } - - /* did we do anything */ - if (!s->s3->hs.tls12.reuse_message && !skip) { - if (s->debug) { - if ((ret = BIO_flush(s->wbio)) <= 0) - goto end; - } - - if (s->s3->hs.state != state) { - new_state = s->s3->hs.state; - s->s3->hs.state = state; - ssl_info_callback(s, SSL_CB_CONNECT_LOOP, 1); - s->s3->hs.state = new_state; - } - } - skip = 0; - } - - end: - s->in_handshake--; - ssl_info_callback(s, SSL_CB_CONNECT_EXIT, ret); - - return (ret); -} - -static int -ssl3_send_client_hello(SSL *s) -{ - CBB cbb, client_hello, session_id, cookie, cipher_suites; - CBB compression_methods; - uint16_t max_version; - size_t sl; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_CLNT_HELLO_A) { - SSL_SESSION *sess = s->session; - - if (!ssl_max_supported_version(s, &max_version)) { - SSLerror(s, SSL_R_NO_PROTOCOLS_AVAILABLE); - return (-1); - } - s->version = max_version; - - if (sess == NULL || sess->ssl_version != s->version || - (sess->session_id_length == 0 && sess->tlsext_tick == NULL) || - sess->not_resumable) { - if (!ssl_get_new_session(s, 0)) - goto err; - } - /* else use the pre-loaded session */ - - /* - * If a DTLS ClientHello message is being resent after a - * HelloVerifyRequest, we must retain the original client - * random value. - */ - if (!SSL_is_dtls(s) || s->d1->send_cookie == 0) - arc4random_buf(s->s3->client_random, SSL3_RANDOM_SIZE); - - if (!ssl3_handshake_msg_start(s, &cbb, &client_hello, - SSL3_MT_CLIENT_HELLO)) - goto err; - - if (!CBB_add_u16(&client_hello, s->version)) - goto err; - - /* Random stuff */ - if (!CBB_add_bytes(&client_hello, s->s3->client_random, - sizeof(s->s3->client_random))) - goto err; - - /* Session ID */ - if (!CBB_add_u8_length_prefixed(&client_hello, &session_id)) - goto err; - if (!s->new_session && - s->session->session_id_length > 0) { - sl = s->session->session_id_length; - if (sl > sizeof(s->session->session_id)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - if (!CBB_add_bytes(&session_id, - s->session->session_id, sl)) - goto err; - } - - /* DTLS Cookie. */ - if (SSL_is_dtls(s)) { - if (s->d1->cookie_len > sizeof(s->d1->cookie)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - if (!CBB_add_u8_length_prefixed(&client_hello, &cookie)) - goto err; - if (!CBB_add_bytes(&cookie, s->d1->cookie, - s->d1->cookie_len)) - goto err; - } - - /* Ciphers supported */ - if (!CBB_add_u16_length_prefixed(&client_hello, &cipher_suites)) - return 0; - if (!ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), - &cipher_suites)) { - SSLerror(s, SSL_R_NO_CIPHERS_AVAILABLE); - goto err; - } - - /* Add in compression methods (null) */ - if (!CBB_add_u8_length_prefixed(&client_hello, - &compression_methods)) - goto err; - if (!CBB_add_u8(&compression_methods, 0)) - goto err; - - /* TLS extensions */ - if (!tlsext_client_build(s, SSL_TLSEXT_MSG_CH, &client_hello)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - if (!ssl3_handshake_msg_finish(s, &cbb)) - goto err; - - s->s3->hs.state = SSL3_ST_CW_CLNT_HELLO_B; - } - - /* SSL3_ST_CW_CLNT_HELLO_B */ - return (ssl3_handshake_write(s)); - - err: - CBB_cleanup(&cbb); - - return (-1); -} - -static int -ssl3_get_dtls_hello_verify(SSL *s) -{ - CBS hello_verify_request, cookie; - size_t cookie_len; - uint16_t ssl_version; - int al, ret; - - if ((ret = ssl3_get_message(s, DTLS1_ST_CR_HELLO_VERIFY_REQUEST_A, - DTLS1_ST_CR_HELLO_VERIFY_REQUEST_B, -1, s->max_cert_list)) <= 0) - return ret; - - if (s->s3->hs.tls12.message_type != DTLS1_MT_HELLO_VERIFY_REQUEST) { - s->d1->send_cookie = 0; - s->s3->hs.tls12.reuse_message = 1; - return (1); - } - - if (s->init_num < 0) - goto decode_err; - - CBS_init(&hello_verify_request, s->init_msg, - s->init_num); - - if (!CBS_get_u16(&hello_verify_request, &ssl_version)) - goto decode_err; - if (!CBS_get_u8_length_prefixed(&hello_verify_request, &cookie)) - goto decode_err; - if (CBS_len(&hello_verify_request) != 0) - goto decode_err; - - /* - * Per RFC 6347 section 4.2.1, the HelloVerifyRequest should always - * contain DTLSv1.0 the version that is going to be negotiated. - * Tolerate DTLSv1.2 just in case. - */ - if (ssl_version != DTLS1_VERSION && ssl_version != DTLS1_2_VERSION) { - SSLerror(s, SSL_R_WRONG_SSL_VERSION); - s->version = (s->version & 0xff00) | (ssl_version & 0xff); - al = SSL_AD_PROTOCOL_VERSION; - goto fatal_err; - } - - if (!CBS_write_bytes(&cookie, s->d1->cookie, - sizeof(s->d1->cookie), &cookie_len)) { - s->d1->cookie_len = 0; - al = SSL_AD_ILLEGAL_PARAMETER; - goto fatal_err; - } - s->d1->cookie_len = cookie_len; - s->d1->send_cookie = 1; - - return 1; - - decode_err: - al = SSL_AD_DECODE_ERROR; - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return -1; -} - -static int -ssl3_get_server_hello(SSL *s) -{ - CBS cbs, server_random, session_id; - uint16_t server_version, cipher_suite; - uint8_t compression_method; - const SSL_CIPHER *cipher; - const SSL_METHOD *method; - unsigned long alg_k; - int al, ret; - - s->first_packet = 1; - if ((ret = ssl3_get_message(s, SSL3_ST_CR_SRVR_HELLO_A, - SSL3_ST_CR_SRVR_HELLO_B, -1, 20000 /* ?? */)) <= 0) - return ret; - s->first_packet = 0; - - if (s->init_num < 0) - goto decode_err; - - CBS_init(&cbs, s->init_msg, s->init_num); - - if (SSL_is_dtls(s)) { - if (s->s3->hs.tls12.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { - if (s->d1->send_cookie == 0) { - s->s3->hs.tls12.reuse_message = 1; - return (1); - } else { - /* Already sent a cookie. */ - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_BAD_MESSAGE_TYPE); - goto fatal_err; - } - } - } - - if (s->s3->hs.tls12.message_type != SSL3_MT_SERVER_HELLO) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_BAD_MESSAGE_TYPE); - goto fatal_err; - } - - if (!CBS_get_u16(&cbs, &server_version)) - goto decode_err; - - if (!ssl_check_version_from_server(s, server_version)) { - SSLerror(s, SSL_R_WRONG_SSL_VERSION); - s->version = (s->version & 0xff00) | (server_version & 0xff); - al = SSL_AD_PROTOCOL_VERSION; - goto fatal_err; - } - s->s3->hs.peer_legacy_version = server_version; - s->version = server_version; - - s->s3->hs.negotiated_tls_version = ssl_tls_version(server_version); - if (s->s3->hs.negotiated_tls_version == 0) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - if ((method = ssl_get_method(server_version)) == NULL) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - s->method = method; - - /* Server random. */ - if (!CBS_get_bytes(&cbs, &server_random, SSL3_RANDOM_SIZE)) - goto decode_err; - if (!CBS_write_bytes(&server_random, s->s3->server_random, - sizeof(s->s3->server_random), NULL)) - goto err; - - if (s->s3->hs.our_max_tls_version >= TLS1_2_VERSION && - s->s3->hs.negotiated_tls_version < s->s3->hs.our_max_tls_version) { - /* - * RFC 8446 section 4.1.3. We must not downgrade if the server - * random value contains the TLS 1.2 or TLS 1.1 magical value. - */ - if (!CBS_skip(&server_random, - CBS_len(&server_random) - sizeof(tls13_downgrade_12))) - goto err; - if (s->s3->hs.negotiated_tls_version == TLS1_2_VERSION && - CBS_mem_equal(&server_random, tls13_downgrade_12, - sizeof(tls13_downgrade_12))) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK); - goto fatal_err; - } - if (CBS_mem_equal(&server_random, tls13_downgrade_11, - sizeof(tls13_downgrade_11))) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_INAPPROPRIATE_FALLBACK); - goto fatal_err; - } - } - - /* Session ID. */ - if (!CBS_get_u8_length_prefixed(&cbs, &session_id)) - goto decode_err; - - if (CBS_len(&session_id) > SSL3_SESSION_ID_SIZE) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_SSL3_SESSION_ID_TOO_LONG); - goto fatal_err; - } - - /* Cipher suite. */ - if (!CBS_get_u16(&cbs, &cipher_suite)) - goto decode_err; - - /* - * Check if we want to resume the session based on external - * pre-shared secret. - */ - if (s->tls_session_secret_cb != NULL) { - SSL_CIPHER *pref_cipher = NULL; - int master_key_length = sizeof(s->session->master_key); - - if (!s->tls_session_secret_cb(s, - s->session->master_key, &master_key_length, NULL, - &pref_cipher, s->tls_session_secret_cb_arg)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - if (master_key_length <= 0) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - s->session->master_key_length = master_key_length; - - if ((s->session->cipher = pref_cipher) == NULL) - s->session->cipher = - ssl3_get_cipher_by_value(cipher_suite); - s->s3->flags |= SSL3_FLAGS_CCS_OK; - } - - if (s->session->session_id_length != 0 && - CBS_mem_equal(&session_id, s->session->session_id, - s->session->session_id_length)) { - if (s->sid_ctx_length != s->session->sid_ctx_length || - timingsafe_memcmp(s->session->sid_ctx, - s->sid_ctx, s->sid_ctx_length) != 0) { - /* actually a client application bug */ - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); - goto fatal_err; - } - s->s3->flags |= SSL3_FLAGS_CCS_OK; - s->hit = 1; - } else { - /* a miss or crap from the other end */ - - /* If we were trying for session-id reuse, make a new - * SSL_SESSION so we don't stuff up other people */ - s->hit = 0; - if (s->session->session_id_length > 0) { - if (!ssl_get_new_session(s, 0)) { - al = SSL_AD_INTERNAL_ERROR; - goto fatal_err; - } - } - - /* - * XXX - improve the handling for the case where there is a - * zero length session identifier. - */ - if (!CBS_write_bytes(&session_id, s->session->session_id, - sizeof(s->session->session_id), - &s->session->session_id_length)) - goto err; - - s->session->ssl_version = s->version; - } - - if ((cipher = ssl3_get_cipher_by_value(cipher_suite)) == NULL) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_UNKNOWN_CIPHER_RETURNED); - goto fatal_err; - } - - /* TLS v1.2 only ciphersuites require v1.2 or later. */ - if ((cipher->algorithm_ssl & SSL_TLSV1_2) && - s->s3->hs.negotiated_tls_version < TLS1_2_VERSION) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED); - goto fatal_err; - } - - if (!ssl_cipher_in_list(SSL_get_ciphers(s), cipher)) { - /* we did not say we would use this cipher */ - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_WRONG_CIPHER_RETURNED); - goto fatal_err; - } - - /* - * Depending on the session caching (internal/external), the cipher - * and/or cipher_id values may not be set. Make sure that - * cipher_id is set and use it for comparison. - */ - if (s->session->cipher) - s->session->cipher_id = s->session->cipher->id; - if (s->hit && (s->session->cipher_id != cipher->id)) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); - goto fatal_err; - } - s->s3->hs.cipher = cipher; - - if (!tls1_transcript_hash_init(s)) - goto err; - - /* - * Don't digest cached records if no sigalgs: we may need them for - * client authentication. - */ - alg_k = s->s3->hs.cipher->algorithm_mkey; - if (!(SSL_USE_SIGALGS(s) || (alg_k & SSL_kGOST))) - tls1_transcript_free(s); - - if (!CBS_get_u8(&cbs, &compression_method)) - goto decode_err; - - if (compression_method != 0) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); - goto fatal_err; - } - - if (!tlsext_client_parse(s, SSL_TLSEXT_MSG_SH, &cbs, &al)) { - SSLerror(s, SSL_R_PARSE_TLSEXT); - goto fatal_err; - } - - if (CBS_len(&cbs) != 0) - goto decode_err; - - /* - * Determine if we need to see RI. Strictly speaking if we want to - * avoid an attack we should *always* see RI even on initial server - * hello because the client doesn't see any renegotiation during an - * attack. However this would mean we could not connect to any server - * which doesn't support RI so for the immediate future tolerate RI - * absence on initial connect only. - */ - if (!s->s3->renegotiate_seen && - !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)) { - al = SSL_AD_HANDSHAKE_FAILURE; - SSLerror(s, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); - goto fatal_err; - } - - if (ssl_check_serverhello_tlsext(s) <= 0) { - SSLerror(s, SSL_R_SERVERHELLO_TLSEXT); - goto err; - } - - return (1); - - decode_err: - /* wrong packet length */ - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - err: - return (-1); -} - -static int -ssl3_get_server_certificate(SSL *s) -{ - CBS cbs, cert_list, cert_data; - STACK_OF(X509) *certs = NULL; - X509 *cert = NULL; - const uint8_t *p; - int al, ret; - - if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_A, - SSL3_ST_CR_CERT_B, -1, s->max_cert_list)) <= 0) - return ret; - - ret = -1; - - if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) { - s->s3->hs.tls12.reuse_message = 1; - return (1); - } - - if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_BAD_MESSAGE_TYPE); - goto fatal_err; - } - - if ((certs = sk_X509_new_null()) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - if (s->init_num < 0) - goto decode_err; - - CBS_init(&cbs, s->init_msg, s->init_num); - - if (!CBS_get_u24_length_prefixed(&cbs, &cert_list)) - goto decode_err; - if (CBS_len(&cbs) != 0) - goto decode_err; - - while (CBS_len(&cert_list) > 0) { - if (!CBS_get_u24_length_prefixed(&cert_list, &cert_data)) - goto decode_err; - p = CBS_data(&cert_data); - if ((cert = d2i_X509(NULL, &p, CBS_len(&cert_data))) == NULL) { - al = SSL_AD_BAD_CERTIFICATE; - SSLerror(s, ERR_R_ASN1_LIB); - goto fatal_err; - } - if (p != CBS_data(&cert_data) + CBS_len(&cert_data)) - goto decode_err; - if (!sk_X509_push(certs, cert)) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - cert = NULL; - } - - /* A server must always provide a non-empty certificate list. */ - if (sk_X509_num(certs) < 1) { - SSLerror(s, SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); - goto decode_err; - } - - if (ssl_verify_cert_chain(s, certs) <= 0 && - s->verify_mode != SSL_VERIFY_NONE) { - al = ssl_verify_alarm_type(s->verify_result); - SSLerror(s, SSL_R_CERTIFICATE_VERIFY_FAILED); - goto fatal_err; - } - s->session->verify_result = s->verify_result; - ERR_clear_error(); - - if (!tls_process_peer_certs(s, certs)) - goto err; - - ret = 1; - - if (0) { - decode_err: - /* wrong packet length */ - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - } - err: - sk_X509_pop_free(certs, X509_free); - X509_free(cert); - - return (ret); -} - -static int -ssl3_get_server_kex_dhe(SSL *s, CBS *cbs) -{ - int decode_error, invalid_params, invalid_key; - int nid = NID_dhKeyAgreement; - - tls_key_share_free(s->s3->hs.key_share); - if ((s->s3->hs.key_share = tls_key_share_new_nid(nid)) == NULL) - goto err; - - if (!tls_key_share_peer_params(s->s3->hs.key_share, cbs, - &decode_error, &invalid_params)) { - if (decode_error) { - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - } - goto err; - } - if (!tls_key_share_peer_public(s->s3->hs.key_share, cbs, - &decode_error, &invalid_key)) { - if (decode_error) { - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - } - goto err; - } - - if (invalid_params) { - SSLerror(s, SSL_R_BAD_DH_P_LENGTH); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); - goto err; - } - if (invalid_key) { - SSLerror(s, SSL_R_BAD_DH_PUB_KEY_LENGTH); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); - goto err; - } - - if (!tls_key_share_peer_security(s, s->s3->hs.key_share)) { - SSLerror(s, SSL_R_DH_KEY_TOO_SMALL); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - return 0; - } - - return 1; - - err: - return 0; -} - -static int -ssl3_get_server_kex_ecdhe(SSL *s, CBS *cbs) -{ - uint8_t curve_type; - uint16_t group_id; - int decode_error; - CBS public; - - if (!CBS_get_u8(cbs, &curve_type)) - goto decode_err; - if (!CBS_get_u16(cbs, &group_id)) - goto decode_err; - - /* Only named curves are supported. */ - if (curve_type != NAMED_CURVE_TYPE) { - SSLerror(s, SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - goto err; - } - - if (!CBS_get_u8_length_prefixed(cbs, &public)) - goto decode_err; - - /* - * Check that the group is one of our preferences - if it is not, - * the server has sent us an invalid group. - */ - if (!tls1_check_group(s, group_id)) { - SSLerror(s, SSL_R_WRONG_CURVE); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_ILLEGAL_PARAMETER); - goto err; - } - - tls_key_share_free(s->s3->hs.key_share); - if ((s->s3->hs.key_share = tls_key_share_new(group_id)) == NULL) - goto err; - - if (!tls_key_share_peer_public(s->s3->hs.key_share, &public, - &decode_error, NULL)) { - if (decode_error) - goto decode_err; - goto err; - } - - return 1; - - decode_err: - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - err: - return 0; -} - -static int -ssl3_get_server_key_exchange(SSL *s) -{ - CBS cbs, signature; - EVP_MD_CTX *md_ctx; - const unsigned char *param; - size_t param_len; - long alg_k, alg_a; - int al, ret; - - alg_k = s->s3->hs.cipher->algorithm_mkey; - alg_a = s->s3->hs.cipher->algorithm_auth; - - /* - * Use same message size as in ssl3_get_certificate_request() - * as ServerKeyExchange message may be skipped. - */ - if ((ret = ssl3_get_message(s, SSL3_ST_CR_KEY_EXCH_A, - SSL3_ST_CR_KEY_EXCH_B, -1, s->max_cert_list)) <= 0) - return ret; - - if ((md_ctx = EVP_MD_CTX_new()) == NULL) - goto err; - - if (s->init_num < 0) - goto err; - - CBS_init(&cbs, s->init_msg, s->init_num); - - if (s->s3->hs.tls12.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { - /* - * Do not skip server key exchange if this cipher suite uses - * ephemeral keys. - */ - if (alg_k & (SSL_kDHE|SSL_kECDHE)) { - SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); - al = SSL_AD_UNEXPECTED_MESSAGE; - goto fatal_err; - } - - s->s3->hs.tls12.reuse_message = 1; - EVP_MD_CTX_free(md_ctx); - return (1); - } - - param = CBS_data(&cbs); - param_len = CBS_len(&cbs); - - if (alg_k & SSL_kDHE) { - if (!ssl3_get_server_kex_dhe(s, &cbs)) - goto err; - } else if (alg_k & SSL_kECDHE) { - if (!ssl3_get_server_kex_ecdhe(s, &cbs)) - goto err; - } else if (alg_k != 0) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_UNEXPECTED_MESSAGE); - goto fatal_err; - } - - param_len -= CBS_len(&cbs); - - /* if it was signed, check the signature */ - if ((alg_a & SSL_aNULL) == 0) { - uint16_t sigalg_value = SIGALG_NONE; - const struct ssl_sigalg *sigalg; - EVP_PKEY_CTX *pctx; - EVP_PKEY *pkey = NULL; - - if ((alg_a & SSL_aRSA) != 0 && - s->session->peer_cert_type == SSL_PKEY_RSA) { - pkey = X509_get0_pubkey(s->session->peer_cert); - } else if ((alg_a & SSL_aECDSA) != 0 && - s->session->peer_cert_type == SSL_PKEY_ECC) { - pkey = X509_get0_pubkey(s->session->peer_cert); - } - if (pkey == NULL) { - al = SSL_AD_ILLEGAL_PARAMETER; - SSLerror(s, SSL_R_UNKNOWN_CERTIFICATE_TYPE); - goto fatal_err; - } - - if (SSL_USE_SIGALGS(s)) { - if (!CBS_get_u16(&cbs, &sigalg_value)) - goto decode_err; - } - if (!CBS_get_u16_length_prefixed(&cbs, &signature)) - goto decode_err; - if (CBS_len(&signature) > EVP_PKEY_size(pkey)) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_WRONG_SIGNATURE_LENGTH); - goto fatal_err; - } - - if ((sigalg = ssl_sigalg_for_peer(s, pkey, - sigalg_value)) == NULL) { - al = SSL_AD_DECODE_ERROR; - goto fatal_err; - } - s->s3->hs.peer_sigalg = sigalg; - - if (!EVP_DigestVerifyInit(md_ctx, &pctx, sigalg->md(), - NULL, pkey)) - goto err; - if (!EVP_DigestVerifyUpdate(md_ctx, s->s3->client_random, - SSL3_RANDOM_SIZE)) - goto err; - if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) && - (!EVP_PKEY_CTX_set_rsa_padding(pctx, - RSA_PKCS1_PSS_PADDING) || - !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) - goto err; - if (!EVP_DigestVerifyUpdate(md_ctx, s->s3->server_random, - SSL3_RANDOM_SIZE)) - goto err; - if (!EVP_DigestVerifyUpdate(md_ctx, param, param_len)) - goto err; - if (EVP_DigestVerifyFinal(md_ctx, CBS_data(&signature), - CBS_len(&signature)) <= 0) { - al = SSL_AD_DECRYPT_ERROR; - SSLerror(s, SSL_R_BAD_SIGNATURE); - goto fatal_err; - } - } - - if (CBS_len(&cbs) != 0) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_EXTRA_DATA_IN_MESSAGE); - goto fatal_err; - } - - EVP_MD_CTX_free(md_ctx); - - return (1); - - decode_err: - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - - err: - EVP_MD_CTX_free(md_ctx); - - return (-1); -} - -static int -ssl3_get_certificate_request(SSL *s) -{ - CBS cert_request, cert_types, rdn_list; - X509_NAME *xn = NULL; - const unsigned char *q; - STACK_OF(X509_NAME) *ca_sk = NULL; - int ret; - - if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_REQ_A, - SSL3_ST_CR_CERT_REQ_B, -1, s->max_cert_list)) <= 0) - return ret; - - ret = 0; - - s->s3->hs.tls12.cert_request = 0; - - if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_DONE) { - s->s3->hs.tls12.reuse_message = 1; - /* - * If we get here we don't need any cached handshake records - * as we wont be doing client auth. - */ - tls1_transcript_free(s); - return (1); - } - - if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE_REQUEST) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); - SSLerror(s, SSL_R_WRONG_MESSAGE_TYPE); - goto err; - } - - /* TLS does not like anon-DH with client cert */ - if (s->s3->hs.cipher->algorithm_auth & SSL_aNULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); - SSLerror(s, SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); - goto err; - } - - if (s->init_num < 0) - goto decode_err; - CBS_init(&cert_request, s->init_msg, s->init_num); - - if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - if (!CBS_get_u8_length_prefixed(&cert_request, &cert_types)) - goto decode_err; - - if (SSL_USE_SIGALGS(s)) { - CBS sigalgs; - - if (CBS_len(&cert_request) < 2) { - SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - if (!CBS_get_u16_length_prefixed(&cert_request, &sigalgs)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - if (CBS_len(&sigalgs) % 2 != 0 || CBS_len(&sigalgs) > 64) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR); - goto err; - } - if (!CBS_stow(&sigalgs, &s->s3->hs.sigalgs, - &s->s3->hs.sigalgs_len)) - goto err; - } - - /* get the CA RDNs */ - if (CBS_len(&cert_request) < 2) { - SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - if (!CBS_get_u16_length_prefixed(&cert_request, &rdn_list) || - CBS_len(&cert_request) != 0) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto err; - } - - while (CBS_len(&rdn_list) > 0) { - CBS rdn; - - if (CBS_len(&rdn_list) < 2) { - SSLerror(s, SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - if (!CBS_get_u16_length_prefixed(&rdn_list, &rdn)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_CA_DN_TOO_LONG); - goto err; - } - - q = CBS_data(&rdn); - if ((xn = d2i_X509_NAME(NULL, &q, CBS_len(&rdn))) == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, - SSL_AD_DECODE_ERROR); - SSLerror(s, ERR_R_ASN1_LIB); - goto err; - } - - if (q != CBS_data(&rdn) + CBS_len(&rdn)) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_CA_DN_LENGTH_MISMATCH); - goto err; - } - if (!sk_X509_NAME_push(ca_sk, xn)) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - xn = NULL; /* avoid free in err block */ - } - - /* we should setup a certificate to return.... */ - s->s3->hs.tls12.cert_request = 1; - sk_X509_NAME_pop_free(s->s3->hs.tls12.ca_names, X509_NAME_free); - s->s3->hs.tls12.ca_names = ca_sk; - ca_sk = NULL; - - ret = 1; - if (0) { - decode_err: - SSLerror(s, SSL_R_BAD_PACKET_LENGTH); - } - err: - X509_NAME_free(xn); - sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); - return (ret); -} - -static int -ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) -{ - return (X509_NAME_cmp(*a, *b)); -} - -static int -ssl3_get_new_session_ticket(SSL *s) -{ - uint32_t lifetime_hint; - CBS cbs, session_ticket; - unsigned int session_id_length = 0; - int al, ret; - - if ((ret = ssl3_get_message(s, SSL3_ST_CR_SESSION_TICKET_A, - SSL3_ST_CR_SESSION_TICKET_B, -1, 16384)) <= 0) - return ret; - - if (s->s3->hs.tls12.message_type == SSL3_MT_FINISHED) { - s->s3->hs.tls12.reuse_message = 1; - return (1); - } - if (s->s3->hs.tls12.message_type != SSL3_MT_NEWSESSION_TICKET) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_BAD_MESSAGE_TYPE); - goto fatal_err; - } - - if (s->init_num < 0) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto fatal_err; - } - - CBS_init(&cbs, s->init_msg, s->init_num); - if (!CBS_get_u32(&cbs, &lifetime_hint) || - !CBS_get_u16_length_prefixed(&cbs, &session_ticket) || - CBS_len(&cbs) != 0) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto fatal_err; - } - s->session->tlsext_tick_lifetime_hint = lifetime_hint; - - if (!CBS_stow(&session_ticket, &s->session->tlsext_tick, - &s->session->tlsext_ticklen)) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - /* - * There are two ways to detect a resumed ticket session. - * One is to set an appropriate session ID and then the server - * must return a match in ServerHello. This allows the normal - * client session ID matching to work and we know much - * earlier that the ticket has been accepted. - * - * The other way is to set zero length session ID when the - * ticket is presented and rely on the handshake to determine - * session resumption. - * - * We choose the former approach because this fits in with - * assumptions elsewhere in OpenSSL. The session ID is set - * to the SHA256 hash of the ticket. - */ - /* XXX - ensure this doesn't overflow session_id if hash is changed. */ - if (!EVP_Digest(CBS_data(&session_ticket), CBS_len(&session_ticket), - s->session->session_id, &session_id_length, EVP_sha256(), NULL)) { - al = SSL_AD_INTERNAL_ERROR; - SSLerror(s, ERR_R_EVP_LIB); - goto fatal_err; - } - s->session->session_id_length = session_id_length; - - return (1); - - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - err: - return (-1); -} - -static int -ssl3_get_cert_status(SSL *s) -{ - CBS cert_status, response; - uint8_t status_type; - int al, ret; - - if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_STATUS_A, - SSL3_ST_CR_CERT_STATUS_B, -1, 16384)) <= 0) - return ret; - - if (s->s3->hs.tls12.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) { - /* - * Tell the callback the server did not send us an OSCP - * response, and has decided to head directly to key exchange. - */ - if (s->ctx->tlsext_status_cb) { - free(s->tlsext_ocsp_resp); - s->tlsext_ocsp_resp = NULL; - s->tlsext_ocsp_resp_len = 0; - - ret = s->ctx->tlsext_status_cb(s, - s->ctx->tlsext_status_arg); - if (ret == 0) { - al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; - SSLerror(s, SSL_R_INVALID_STATUS_RESPONSE); - goto fatal_err; - } - if (ret < 0) { - al = SSL_AD_INTERNAL_ERROR; - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto fatal_err; - } - } - s->s3->hs.tls12.reuse_message = 1; - return (1); - } - - if (s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE && - s->s3->hs.tls12.message_type != SSL3_MT_CERTIFICATE_STATUS) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_BAD_MESSAGE_TYPE); - goto fatal_err; - } - - if (s->init_num < 0) { - /* need at least status type + length */ - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto fatal_err; - } - - CBS_init(&cert_status, s->init_msg, s->init_num); - if (!CBS_get_u8(&cert_status, &status_type) || - CBS_len(&cert_status) < 3) { - /* need at least status type + length */ - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto fatal_err; - } - - if (status_type != TLSEXT_STATUSTYPE_ocsp) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_UNSUPPORTED_STATUS_TYPE); - goto fatal_err; - } - - if (!CBS_get_u24_length_prefixed(&cert_status, &response) || - CBS_len(&cert_status) != 0) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_LENGTH_MISMATCH); - goto fatal_err; - } - - if (!CBS_stow(&response, &s->tlsext_ocsp_resp, - &s->tlsext_ocsp_resp_len)) { - al = SSL_AD_INTERNAL_ERROR; - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto fatal_err; - } - - if (s->ctx->tlsext_status_cb) { - ret = s->ctx->tlsext_status_cb(s, - s->ctx->tlsext_status_arg); - if (ret == 0) { - al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; - SSLerror(s, SSL_R_INVALID_STATUS_RESPONSE); - goto fatal_err; - } - if (ret < 0) { - al = SSL_AD_INTERNAL_ERROR; - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto fatal_err; - } - } - return (1); - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return (-1); -} - -static int -ssl3_get_server_done(SSL *s) -{ - int ret; - - if ((ret = ssl3_get_message(s, SSL3_ST_CR_SRVR_DONE_A, - SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE, - 30 /* should be very small, like 0 :-) */)) <= 0) - return ret; - - if (s->init_num != 0) { - /* should contain no data */ - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); - SSLerror(s, SSL_R_LENGTH_MISMATCH); - return -1; - } - - return 1; -} - -static int -ssl3_send_client_kex_rsa(SSL *s, CBB *cbb) -{ - unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH]; - unsigned char *enc_pms = NULL; - uint16_t max_legacy_version; - EVP_PKEY *pkey; - RSA *rsa; - int ret = 0; - int enc_len; - CBB epms; - - /* - * RSA-Encrypted Premaster Secret Message - RFC 5246 section 7.4.7.1. - */ - - pkey = X509_get0_pubkey(s->session->peer_cert); - if (pkey == NULL || (rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - /* - * Our maximum legacy protocol version - while RFC 5246 section 7.4.7.1 - * says "The latest (newest) version supported by the client", if we're - * doing RSA key exchange then we have to presume that we're talking to - * a server that does not understand the supported versions extension - * and therefore our maximum version is that sent in the ClientHello. - */ - if (!ssl_max_legacy_version(s, &max_legacy_version)) - goto err; - pms[0] = max_legacy_version >> 8; - pms[1] = max_legacy_version & 0xff; - arc4random_buf(&pms[2], sizeof(pms) - 2); - - if ((enc_pms = malloc(RSA_size(rsa))) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - enc_len = RSA_public_encrypt(sizeof(pms), pms, enc_pms, rsa, - RSA_PKCS1_PADDING); - if (enc_len <= 0) { - SSLerror(s, SSL_R_BAD_RSA_ENCRYPT); - goto err; - } - - if (!CBB_add_u16_length_prefixed(cbb, &epms)) - goto err; - if (!CBB_add_bytes(&epms, enc_pms, enc_len)) - goto err; - if (!CBB_flush(cbb)) - goto err; - - if (!tls12_derive_master_secret(s, pms, sizeof(pms))) - goto err; - - ret = 1; - - err: - explicit_bzero(pms, sizeof(pms)); - free(enc_pms); - - return ret; -} - -static int -ssl3_send_client_kex_dhe(SSL *s, CBB *cbb) -{ - uint8_t *key = NULL; - size_t key_len = 0; - int ret = 0; - - /* Ensure that we have an ephemeral key from the server for DHE. */ - if (s->s3->hs.key_share == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - SSLerror(s, SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); - goto err; - } - - if (!tls_key_share_generate(s->s3->hs.key_share)) - goto err; - if (!tls_key_share_public(s->s3->hs.key_share, cbb)) - goto err; - if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len)) - goto err; - - if (!tls_key_share_peer_security(s, s->s3->hs.key_share)) { - SSLerror(s, SSL_R_DH_KEY_TOO_SMALL); - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - return 0; - } - - if (!tls12_derive_master_secret(s, key, key_len)) - goto err; - - ret = 1; - - err: - freezero(key, key_len); - - return ret; -} - -static int -ssl3_send_client_kex_ecdhe(SSL *s, CBB *cbb) -{ - uint8_t *key = NULL; - size_t key_len = 0; - CBB public; - int ret = 0; - - /* Ensure that we have an ephemeral key for ECDHE. */ - if (s->s3->hs.key_share == NULL) { - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - if (!tls_key_share_generate(s->s3->hs.key_share)) - goto err; - - if (!CBB_add_u8_length_prefixed(cbb, &public)) - return 0; - if (!tls_key_share_public(s->s3->hs.key_share, &public)) - goto err; - if (!CBB_flush(cbb)) - goto err; - - if (!tls_key_share_derive(s->s3->hs.key_share, &key, &key_len)) - goto err; - - if (!tls12_derive_master_secret(s, key, key_len)) - goto err; - - ret = 1; - - err: - freezero(key, key_len); - - return ret; -} - -static int -ssl3_send_client_kex_gost(SSL *s, CBB *cbb) -{ - unsigned char premaster_secret[32], shared_ukm[32], tmp[256]; - EVP_PKEY_CTX *pkey_ctx = NULL; - EVP_MD_CTX *ukm_hash = NULL; - EVP_PKEY *pkey; - size_t msglen; - unsigned int md_len; - CBB gostblob; - int nid; - int ret = 0; - - /* Get server certificate PKEY and create ctx from it */ - pkey = X509_get0_pubkey(s->session->peer_cert); - if (pkey == NULL || s->session->peer_cert_type != SSL_PKEY_GOST01) { - SSLerror(s, SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); - goto err; - } - if ((pkey_ctx = EVP_PKEY_CTX_new(pkey, NULL)) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - /* - * If we have send a certificate, and certificate key parameters match - * those of server certificate, use certificate key for key exchange. - * Otherwise, generate ephemeral key pair. - */ - if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0) - goto err; - - /* Generate session key. */ - arc4random_buf(premaster_secret, sizeof(premaster_secret)); - - /* - * If we have client certificate, use its secret as peer key. - * XXX - this presumably lacks PFS. - */ - if (s->s3->hs.tls12.cert_request != 0 && - s->cert->key->privatekey != NULL) { - 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(); - } - } - - /* - * Compute shared IV and store it in algorithm-specific context data. - */ - if ((ukm_hash = EVP_MD_CTX_new()) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - - /* XXX check handshake hash instead. */ - if (s->s3->hs.cipher->algorithm2 & SSL_HANDSHAKE_MAC_GOST94) - nid = NID_id_GostR3411_94; - else - nid = NID_id_tc26_gost3411_2012_256; - if (!EVP_DigestInit(ukm_hash, EVP_get_digestbynid(nid))) - goto err; - if (!EVP_DigestUpdate(ukm_hash, s->s3->client_random, SSL3_RANDOM_SIZE)) - goto err; - if (!EVP_DigestUpdate(ukm_hash, s->s3->server_random, SSL3_RANDOM_SIZE)) - goto err; - if (!EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len)) - goto err; - if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, - EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) { - SSLerror(s, SSL_R_LIBRARY_BUG); - goto err; - } - - /* - * Make GOST keytransport blob message, encapsulate it into sequence. - */ - msglen = 255; - if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, premaster_secret, - sizeof(premaster_secret)) < 0) { - SSLerror(s, SSL_R_LIBRARY_BUG); - goto err; - } - - if (!CBB_add_asn1(cbb, &gostblob, CBS_ASN1_SEQUENCE)) - goto err; - if (!CBB_add_bytes(&gostblob, tmp, msglen)) - goto err; - if (!CBB_flush(cbb)) - goto err; - - /* 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) - s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; - - if (!tls12_derive_master_secret(s, premaster_secret, 32)) - goto err; - - ret = 1; - - err: - explicit_bzero(premaster_secret, sizeof(premaster_secret)); - EVP_PKEY_CTX_free(pkey_ctx); - EVP_MD_CTX_free(ukm_hash); - - return ret; -} - -static int -ssl3_send_client_key_exchange(SSL *s) -{ - unsigned long alg_k; - CBB cbb, kex; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_KEY_EXCH_A) { - alg_k = s->s3->hs.cipher->algorithm_mkey; - - if (!ssl3_handshake_msg_start(s, &cbb, &kex, - SSL3_MT_CLIENT_KEY_EXCHANGE)) - goto err; - - if (alg_k & SSL_kRSA) { - if (!ssl3_send_client_kex_rsa(s, &kex)) - goto err; - } else if (alg_k & SSL_kDHE) { - if (!ssl3_send_client_kex_dhe(s, &kex)) - goto err; - } else if (alg_k & SSL_kECDHE) { - if (!ssl3_send_client_kex_ecdhe(s, &kex)) - goto err; - } else if (alg_k & SSL_kGOST) { - if (!ssl3_send_client_kex_gost(s, &kex)) - goto err; - } else { - ssl3_send_alert(s, SSL3_AL_FATAL, - SSL_AD_HANDSHAKE_FAILURE); - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - if (!ssl3_handshake_msg_finish(s, &cbb)) - goto err; - - s->s3->hs.state = SSL3_ST_CW_KEY_EXCH_B; - } - - /* SSL3_ST_CW_KEY_EXCH_B */ - return (ssl3_handshake_write(s)); - - err: - CBB_cleanup(&cbb); - - return (-1); -} - -static int -ssl3_send_client_verify_sigalgs(SSL *s, EVP_PKEY *pkey, - const struct ssl_sigalg *sigalg, CBB *cert_verify) -{ - CBB cbb_signature; - EVP_PKEY_CTX *pctx = NULL; - EVP_MD_CTX *mctx = NULL; - const unsigned char *hdata; - unsigned char *signature = NULL; - size_t signature_len, hdata_len; - int ret = 0; - - if ((mctx = EVP_MD_CTX_new()) == NULL) - goto err; - - if (!tls1_transcript_data(s, &hdata, &hdata_len)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - if (!EVP_DigestSignInit(mctx, &pctx, sigalg->md(), NULL, pkey)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (sigalg->key_type == EVP_PKEY_GOSTR01 && - EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, - EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if ((sigalg->flags & SIGALG_FLAG_RSA_PSS) && - (!EVP_PKEY_CTX_set_rsa_padding(pctx, RSA_PKCS1_PSS_PADDING) || - !EVP_PKEY_CTX_set_rsa_pss_saltlen(pctx, -1))) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (!EVP_DigestSignUpdate(mctx, hdata, hdata_len)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (!EVP_DigestSignFinal(mctx, NULL, &signature_len) || - signature_len == 0) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if ((signature = calloc(1, signature_len)) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - if (!EVP_DigestSignFinal(mctx, signature, &signature_len)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - - if (!CBB_add_u16(cert_verify, sigalg->value)) - goto err; - if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature)) - goto err; - if (!CBB_add_bytes(&cbb_signature, signature, signature_len)) - goto err; - if (!CBB_flush(cert_verify)) - goto err; - - ret = 1; - - err: - EVP_MD_CTX_free(mctx); - free(signature); - return ret; -} - -static int -ssl3_send_client_verify_rsa(SSL *s, EVP_PKEY *pkey, CBB *cert_verify) -{ - CBB cbb_signature; - RSA *rsa; - unsigned char data[EVP_MAX_MD_SIZE]; - unsigned char *signature = NULL; - unsigned int signature_len; - size_t data_len; - int ret = 0; - - if (!tls1_transcript_hash_value(s, data, sizeof(data), &data_len)) - goto err; - if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL) - goto err; - if ((rsa = EVP_PKEY_get0_RSA(pkey)) == NULL) - goto err; - if (RSA_sign(NID_md5_sha1, data, data_len, signature, &signature_len, - rsa) <= 0 ) { - SSLerror(s, ERR_R_RSA_LIB); - goto err; - } - - if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature)) - goto err; - if (!CBB_add_bytes(&cbb_signature, signature, signature_len)) - goto err; - if (!CBB_flush(cert_verify)) - goto err; - - ret = 1; - err: - free(signature); - return ret; -} - -static int -ssl3_send_client_verify_ec(SSL *s, EVP_PKEY *pkey, CBB *cert_verify) -{ - CBB cbb_signature; - EC_KEY *eckey; - unsigned char data[EVP_MAX_MD_SIZE]; - unsigned char *signature = NULL; - unsigned int signature_len; - int ret = 0; - - if (!tls1_transcript_hash_value(s, data, sizeof(data), NULL)) - goto err; - if ((signature = calloc(1, EVP_PKEY_size(pkey))) == NULL) - goto err; - if ((eckey = EVP_PKEY_get0_EC_KEY(pkey)) == NULL) - goto err; - if (!ECDSA_sign(0, &data[MD5_DIGEST_LENGTH], SHA_DIGEST_LENGTH, - signature, &signature_len, eckey)) { - SSLerror(s, ERR_R_ECDSA_LIB); - goto err; - } - - if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature)) - goto err; - if (!CBB_add_bytes(&cbb_signature, signature, signature_len)) - goto err; - if (!CBB_flush(cert_verify)) - goto err; - - ret = 1; - err: - free(signature); - return ret; -} - -#ifndef OPENSSL_NO_GOST -static int -ssl3_send_client_verify_gost(SSL *s, EVP_PKEY *pkey, CBB *cert_verify) -{ - CBB cbb_signature; - EVP_MD_CTX *mctx; - EVP_PKEY_CTX *pctx; - const EVP_MD *md; - const unsigned char *hdata; - unsigned char *signature = NULL; - size_t signature_len; - size_t hdata_len; - int nid; - int ret = 0; - - if ((mctx = EVP_MD_CTX_new()) == NULL) - goto err; - - if (!tls1_transcript_data(s, &hdata, &hdata_len)) { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - if (!EVP_PKEY_get_default_digest_nid(pkey, &nid) || - (md = EVP_get_digestbynid(nid)) == NULL) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (!EVP_DigestSignInit(mctx, &pctx, md, NULL, pkey)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, - EVP_PKEY_CTRL_GOST_SIG_FORMAT, GOST_SIG_FORMAT_RS_LE, NULL) <= 0) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (!EVP_DigestSignUpdate(mctx, hdata, hdata_len)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if (!EVP_DigestSignFinal(mctx, NULL, &signature_len) || - signature_len == 0) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - if ((signature = calloc(1, signature_len)) == NULL) { - SSLerror(s, ERR_R_MALLOC_FAILURE); - goto err; - } - if (!EVP_DigestSignFinal(mctx, signature, &signature_len)) { - SSLerror(s, ERR_R_EVP_LIB); - goto err; - } - - if (!CBB_add_u16_length_prefixed(cert_verify, &cbb_signature)) - goto err; - if (!CBB_add_bytes(&cbb_signature, signature, signature_len)) - goto err; - if (!CBB_flush(cert_verify)) - goto err; - - ret = 1; - err: - EVP_MD_CTX_free(mctx); - free(signature); - return ret; -} -#endif - -static int -ssl3_send_client_verify(SSL *s) -{ - const struct ssl_sigalg *sigalg; - CBB cbb, cert_verify; - EVP_PKEY *pkey; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_CERT_VRFY_A) { - if (!ssl3_handshake_msg_start(s, &cbb, &cert_verify, - SSL3_MT_CERTIFICATE_VERIFY)) - goto err; - - pkey = s->cert->key->privatekey; - if ((sigalg = ssl_sigalg_select(s, pkey)) == NULL) { - SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR); - goto err; - } - s->s3->hs.our_sigalg = sigalg; - - /* - * For TLS v1.2 send signature algorithm and signature using - * agreed digest and cached handshake records. - */ - if (SSL_USE_SIGALGS(s)) { - if (!ssl3_send_client_verify_sigalgs(s, pkey, sigalg, - &cert_verify)) - goto err; - } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { - if (!ssl3_send_client_verify_rsa(s, pkey, &cert_verify)) - goto err; - } else if (EVP_PKEY_id(pkey) == EVP_PKEY_EC) { - if (!ssl3_send_client_verify_ec(s, pkey, &cert_verify)) - goto err; -#ifndef OPENSSL_NO_GOST - } else if (EVP_PKEY_id(pkey) == NID_id_GostR3410_94 || - EVP_PKEY_id(pkey) == NID_id_GostR3410_2001) { - if (!ssl3_send_client_verify_gost(s, pkey, &cert_verify)) - goto err; -#endif - } else { - SSLerror(s, ERR_R_INTERNAL_ERROR); - goto err; - } - - tls1_transcript_free(s); - - if (!ssl3_handshake_msg_finish(s, &cbb)) - goto err; - - s->s3->hs.state = SSL3_ST_CW_CERT_VRFY_B; - } - - return (ssl3_handshake_write(s)); - - err: - CBB_cleanup(&cbb); - - return (-1); -} - -static int -ssl3_send_client_certificate(SSL *s) -{ - EVP_PKEY *pkey = NULL; - X509 *x509 = NULL; - CBB cbb, client_cert; - int i; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_CERT_A) { - if (s->cert->key->x509 == NULL || - s->cert->key->privatekey == NULL) - s->s3->hs.state = SSL3_ST_CW_CERT_B; - else - s->s3->hs.state = SSL3_ST_CW_CERT_C; - } - - /* We need to get a client cert */ - if (s->s3->hs.state == SSL3_ST_CW_CERT_B) { - /* - * If we get an error, we need to - * ssl->rwstate = SSL_X509_LOOKUP; return(-1); - * We then get retried later. - */ - i = ssl_do_client_cert_cb(s, &x509, &pkey); - if (i < 0) { - s->rwstate = SSL_X509_LOOKUP; - return (-1); - } - s->rwstate = SSL_NOTHING; - if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { - s->s3->hs.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; - SSLerror(s, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); - } - - X509_free(x509); - EVP_PKEY_free(pkey); - if (i == 0) { - s->s3->hs.tls12.cert_request = 2; - - /* There is no client certificate to verify. */ - tls1_transcript_free(s); - } - - /* Ok, we have a cert */ - s->s3->hs.state = SSL3_ST_CW_CERT_C; - } - - if (s->s3->hs.state == SSL3_ST_CW_CERT_C) { - if (!ssl3_handshake_msg_start(s, &cbb, &client_cert, - SSL3_MT_CERTIFICATE)) - goto err; - if (!ssl3_output_cert_chain(s, &client_cert, - (s->s3->hs.tls12.cert_request == 2) ? NULL : s->cert->key)) - goto err; - if (!ssl3_handshake_msg_finish(s, &cbb)) - goto err; - - s->s3->hs.state = SSL3_ST_CW_CERT_D; - } - - /* SSL3_ST_CW_CERT_D */ - return (ssl3_handshake_write(s)); - - err: - CBB_cleanup(&cbb); - - return (0); -} - -#define has_bits(i,m) (((i)&(m)) == (m)) - -static int -ssl3_check_cert_and_algorithm(SSL *s) -{ - long alg_k, alg_a; - int nid = NID_undef; - int i; - - alg_k = s->s3->hs.cipher->algorithm_mkey; - alg_a = s->s3->hs.cipher->algorithm_auth; - - /* We don't have a certificate. */ - if (alg_a & SSL_aNULL) - return (1); - - if (s->s3->hs.key_share != NULL) - nid = tls_key_share_nid(s->s3->hs.key_share); - - /* This is the passed certificate. */ - - if (s->session->peer_cert_type == SSL_PKEY_ECC) { - if (!ssl_check_srvr_ecc_cert_and_alg(s, s->session->peer_cert)) { - SSLerror(s, SSL_R_BAD_ECC_CERT); - goto fatal_err; - } - return (1); - } - - i = X509_certificate_type(s->session->peer_cert, NULL); - - /* Check that we have a certificate if we require one. */ - if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_SIGN)) { - SSLerror(s, SSL_R_MISSING_RSA_SIGNING_CERT); - goto fatal_err; - } - if ((alg_k & SSL_kRSA) && !has_bits(i, EVP_PK_RSA|EVP_PKT_ENC)) { - SSLerror(s, SSL_R_MISSING_RSA_ENCRYPTING_CERT); - goto fatal_err; - } - if ((alg_k & SSL_kDHE) && - !(has_bits(i, EVP_PK_DH|EVP_PKT_EXCH) || (nid == NID_dhKeyAgreement))) { - SSLerror(s, SSL_R_MISSING_DH_KEY); - goto fatal_err; - } - - return (1); - - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); - - return (0); -} - -/* - * Check to see if handshake is full or resumed. Usually this is just a - * case of checking to see if a cache hit has occurred. In the case of - * session tickets we have to check the next message to be sure. - */ - -static int -ssl3_check_finished(SSL *s) -{ - int ret; - - /* If we have no ticket it cannot be a resumed session. */ - if (!s->session->tlsext_tick) - return (1); - /* this function is called when we really expect a Certificate - * message, so permit appropriate message length */ - if ((ret = ssl3_get_message(s, SSL3_ST_CR_CERT_A, - SSL3_ST_CR_CERT_B, -1, s->max_cert_list)) <= 0) - return ret; - - s->s3->hs.tls12.reuse_message = 1; - if ((s->s3->hs.tls12.message_type == SSL3_MT_FINISHED) || - (s->s3->hs.tls12.message_type == SSL3_MT_NEWSESSION_TICKET)) - return (2); - - return (1); -} - -static int -ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) -{ - int i = 0; - -#ifndef OPENSSL_NO_ENGINE - if (s->ctx->client_cert_engine) { - i = ENGINE_load_ssl_client_cert( - s->ctx->client_cert_engine, s, - SSL_get_client_CA_list(s), px509, ppkey, NULL, NULL, NULL); - if (i != 0) - return (i); - } -#endif - if (s->ctx->client_cert_cb) - i = s->ctx->client_cert_cb(s, px509, ppkey); - return (i); -} - -static int -ssl3_send_client_change_cipher_spec(SSL *s) -{ - size_t outlen; - CBB cbb; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_CHANGE_A) { - if (!CBB_init_fixed(&cbb, s->init_buf->data, - s->init_buf->length)) - goto err; - if (!CBB_add_u8(&cbb, SSL3_MT_CCS)) - goto err; - if (!CBB_finish(&cbb, NULL, &outlen)) - goto err; - - if (outlen > INT_MAX) - goto err; - - s->init_num = (int)outlen; - s->init_off = 0; - - if (SSL_is_dtls(s)) { - s->d1->handshake_write_seq = - s->d1->next_handshake_write_seq; - dtls1_set_message_header_int(s, SSL3_MT_CCS, 0, - s->d1->handshake_write_seq, 0, 0); - dtls1_buffer_message(s, 1); - } - - s->s3->hs.state = SSL3_ST_CW_CHANGE_B; - } - - /* SSL3_ST_CW_CHANGE_B */ - return ssl3_record_write(s, SSL3_RT_CHANGE_CIPHER_SPEC); - - err: - CBB_cleanup(&cbb); - - return -1; -} - -static int -ssl3_send_client_finished(SSL *s) -{ - CBB cbb, finished; - - memset(&cbb, 0, sizeof(cbb)); - - if (s->s3->hs.state == SSL3_ST_CW_FINISHED_A) { - if (!tls12_derive_finished(s)) - goto err; - - /* Copy finished so we can use it for renegotiation checks. */ - memcpy(s->s3->previous_client_finished, - s->s3->hs.finished, s->s3->hs.finished_len); - s->s3->previous_client_finished_len = - s->s3->hs.finished_len; - - if (!ssl3_handshake_msg_start(s, &cbb, &finished, - SSL3_MT_FINISHED)) - goto err; - if (!CBB_add_bytes(&finished, s->s3->hs.finished, - s->s3->hs.finished_len)) - goto err; - if (!ssl3_handshake_msg_finish(s, &cbb)) - goto err; - - s->s3->hs.state = SSL3_ST_CW_FINISHED_B; - } - - return (ssl3_handshake_write(s)); - - err: - CBB_cleanup(&cbb); - - return (-1); -} - -static int -ssl3_get_server_finished(SSL *s) -{ - int al, md_len, ret; - CBS cbs; - - /* should actually be 36+4 :-) */ - if ((ret = ssl3_get_message(s, SSL3_ST_CR_FINISHED_A, - SSL3_ST_CR_FINISHED_B, SSL3_MT_FINISHED, 64)) <= 0) - return ret; - - /* If this occurs, we have missed a message */ - if (!s->s3->change_cipher_spec) { - al = SSL_AD_UNEXPECTED_MESSAGE; - SSLerror(s, SSL_R_GOT_A_FIN_BEFORE_A_CCS); - goto fatal_err; - } - s->s3->change_cipher_spec = 0; - - md_len = TLS1_FINISH_MAC_LENGTH; - - if (s->init_num < 0) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); - goto fatal_err; - } - - CBS_init(&cbs, s->init_msg, s->init_num); - - if (s->s3->hs.peer_finished_len != md_len || - CBS_len(&cbs) != md_len) { - al = SSL_AD_DECODE_ERROR; - SSLerror(s, SSL_R_BAD_DIGEST_LENGTH); - goto fatal_err; - } - - if (!CBS_mem_equal(&cbs, s->s3->hs.peer_finished, CBS_len(&cbs))) { - al = SSL_AD_DECRYPT_ERROR; - SSLerror(s, SSL_R_DIGEST_CHECK_FAILED); - goto fatal_err; - } - - /* Copy finished so we can use it for renegotiation checks. */ - OPENSSL_assert(md_len <= EVP_MAX_MD_SIZE); - memcpy(s->s3->previous_server_finished, - s->s3->hs.peer_finished, md_len); - s->s3->previous_server_finished_len = md_len; - - return (1); - fatal_err: - ssl3_send_alert(s, SSL3_AL_FATAL, al); - return (0); -} -- cgit v1.2.3-55-g6feb