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- /* ssl/statem/statem_clnt.c */
- /* 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 <stdio.h>
- #include "../ssl_locl.h"
- #include "statem_locl.h"
- #include <openssl/buffer.h>
- #include <openssl/rand.h>
- #include <openssl/objects.h>
- #include <openssl/evp.h>
- #include <openssl/md5.h>
- #ifndef OPENSSL_NO_DH
- # include <openssl/dh.h>
- #endif
- #include <openssl/bn.h>
- #ifndef OPENSSL_NO_ENGINE
- # include <openssl/engine.h>
- #endif
- static ossl_inline int cert_req_allowed(SSL *s);
- static int key_exchange_expected(SSL *s);
- static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
- static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p);
- /*
- * Is a CertificateRequest message allowed at the moment or not?
- *
- * Return values are:
- * 1: Yes
- * 0: No
- */
- static ossl_inline int cert_req_allowed(SSL *s)
- {
- /* TLS does not like anon-DH with client cert */
- if ((s->version > SSL3_VERSION
- && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
- || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
- return 0;
- return 1;
- }
- /*
- * Should we expect the ServerKeyExchange message or not?
- *
- * Return values are:
- * 1: Yes
- * 0: No
- * -1: Error
- */
- static int key_exchange_expected(SSL *s)
- {
- long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- /*
- * Can't skip server key exchange if this is an ephemeral
- * ciphersuite or for SRP
- */
- if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
- | SSL_kSRP)) {
- return 1;
- }
- return 0;
- }
- /*
- * ossl_statem_client_read_transition() encapsulates the logic for the allowed
- * handshake state transitions when the client is reading messages from the
- * server. The message type that the server has sent is provided in |mt|. The
- * current state is in |s->statem.hand_state|.
- *
- * Return values are:
- * 1: Success (transition allowed)
- * 0: Error (transition not allowed)
- */
- int ossl_statem_client_read_transition(SSL *s, int mt)
- {
- OSSL_STATEM *st = &s->statem;
- int ske_expected;
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- if (mt == SSL3_MT_SERVER_HELLO) {
- st->hand_state = TLS_ST_CR_SRVR_HELLO;
- return 1;
- }
- if (SSL_IS_DTLS(s)) {
- if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
- st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
- return 1;
- }
- }
- break;
- case TLS_ST_CR_SRVR_HELLO:
- if (s->hit) {
- if (s->tlsext_ticket_expected) {
- if (mt == SSL3_MT_NEWSESSION_TICKET) {
- st->hand_state = TLS_ST_CR_SESSION_TICKET;
- return 1;
- }
- } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- } else {
- if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
- st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
- return 1;
- } else if (s->version >= TLS1_VERSION
- && s->tls_session_secret_cb != NULL
- && s->session->tlsext_tick != NULL
- && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- /*
- * Normally, we can tell if the server is resuming the session
- * from the session ID. EAP-FAST (RFC 4851), however, relies on
- * the next server message after the ServerHello to determine if
- * the server is resuming.
- */
- s->hit = 1;
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- } else if (!(s->s3->tmp.new_cipher->algorithm_auth
- & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
- if (mt == SSL3_MT_CERTIFICATE) {
- st->hand_state = TLS_ST_CR_CERT;
- return 1;
- }
- } else {
- ske_expected = key_exchange_expected(s);
- if (ske_expected < 0)
- return 0;
- /* SKE is optional for some PSK ciphersuites */
- if (ske_expected
- || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
- && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
- if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_CR_KEY_EXCH;
- return 1;
- }
- } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
- && cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- } else if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- }
- }
- break;
- case TLS_ST_CR_CERT:
- /*
- * The CertificateStatus message is optional even if
- * |tlsext_status_expected| is set
- */
- if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
- st->hand_state = TLS_ST_CR_CERT_STATUS;
- return 1;
- }
- /* Fall through */
- case TLS_ST_CR_CERT_STATUS:
- ske_expected = key_exchange_expected(s);
- if (ske_expected < 0)
- return 0;
- /* SKE is optional for some PSK ciphersuites */
- if (ske_expected
- || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
- && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
- if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
- st->hand_state = TLS_ST_CR_KEY_EXCH;
- return 1;
- }
- return 0;
- }
- /* Fall through */
- case TLS_ST_CR_KEY_EXCH:
- if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
- if (cert_req_allowed(s)) {
- st->hand_state = TLS_ST_CR_CERT_REQ;
- return 1;
- }
- return 0;
- }
- /* Fall through */
- case TLS_ST_CR_CERT_REQ:
- if (mt == SSL3_MT_SERVER_DONE) {
- st->hand_state = TLS_ST_CR_SRVR_DONE;
- return 1;
- }
- break;
- case TLS_ST_CW_FINISHED:
- if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) {
- st->hand_state = TLS_ST_CR_SESSION_TICKET;
- return 1;
- } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- break;
- case TLS_ST_CR_SESSION_TICKET:
- if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
- st->hand_state = TLS_ST_CR_CHANGE;
- return 1;
- }
- break;
- case TLS_ST_CR_CHANGE:
- if (mt == SSL3_MT_FINISHED) {
- st->hand_state = TLS_ST_CR_FINISHED;
- return 1;
- }
- break;
- default:
- break;
- }
- /* No valid transition found */
- return 0;
- }
- /*
- * client_write_transition() works out what handshake state to move to next
- * when the client is writing messages to be sent to the server.
- */
- WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_OK:
- /* Renegotiation - fall through */
- case TLS_ST_BEFORE:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CLNT_HELLO:
- /*
- * No transition at the end of writing because we don't know what
- * we will be sent
- */
- return WRITE_TRAN_FINISHED;
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- st->hand_state = TLS_ST_CW_CLNT_HELLO;
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CR_SRVR_DONE:
- if (s->s3->tmp.cert_req)
- st->hand_state = TLS_ST_CW_CERT;
- else
- st->hand_state = TLS_ST_CW_KEY_EXCH;
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CERT:
- st->hand_state = TLS_ST_CW_KEY_EXCH;
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_KEY_EXCH:
- /*
- * 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->tmp.cert_req == 1) {
- st->hand_state = TLS_ST_CW_CERT_VRFY;
- } else {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
- if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
- st->hand_state = TLS_ST_CW_CHANGE;
- }
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CERT_VRFY:
- st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
- case TLS_ST_CW_CHANGE:
- #if defined(OPENSSL_NO_NEXTPROTONEG)
- st->hand_state = TLS_ST_CW_FINISHED;
- #else
- if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
- st->hand_state = TLS_ST_CW_NEXT_PROTO;
- else
- st->hand_state = TLS_ST_CW_FINISHED;
- #endif
- return WRITE_TRAN_CONTINUE;
- #if !defined(OPENSSL_NO_NEXTPROTONEG)
- case TLS_ST_CW_NEXT_PROTO:
- st->hand_state = TLS_ST_CW_FINISHED;
- return WRITE_TRAN_CONTINUE;
- #endif
- case TLS_ST_CW_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_OK;
- ossl_statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- } else {
- return WRITE_TRAN_FINISHED;
- }
- case TLS_ST_CR_FINISHED:
- if (s->hit) {
- st->hand_state = TLS_ST_CW_CHANGE;
- return WRITE_TRAN_CONTINUE;
- } else {
- st->hand_state = TLS_ST_OK;
- ossl_statem_set_in_init(s, 0);
- return WRITE_TRAN_CONTINUE;
- }
- default:
- /* Shouldn't happen */
- return WRITE_TRAN_ERROR;
- }
- }
- /*
- * Perform any pre work that needs to be done prior to sending a message from
- * the client to the server.
- */
- WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- s->shutdown = 0;
- if (SSL_IS_DTLS(s)) {
- /* every DTLS ClientHello resets Finished MAC */
- ssl3_init_finished_mac(s);
- }
- break;
- case TLS_ST_CW_CERT:
- return tls_prepare_client_certificate(s, wst);
- case TLS_ST_CW_CHANGE:
- if (SSL_IS_DTLS(s)) {
- if (s->hit) {
- /*
- * We're into the last flight so we don't retransmit these
- * messages unless we need to.
- */
- st->use_timer = 0;
- }
- #ifndef OPENSSL_NO_SCTP
- if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
- return dtls_wait_for_dry(s);
- #endif
- }
- return WORK_FINISHED_CONTINUE;
- case TLS_ST_OK:
- return tls_finish_handshake(s, wst);
- default:
- /* No pre work to be done */
- break;
- }
- return WORK_FINISHED_CONTINUE;
- }
- /*
- * Perform any work that needs to be done after sending a message from the
- * client to the server.
- */
- WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
- {
- OSSL_STATEM *st = &s->statem;
- s->init_num = 0;
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1)
- return WORK_MORE_A;
- #ifndef OPENSSL_NO_SCTP
- /* Disable buffering for SCTP */
- if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) {
- #endif
- /*
- * turn on buffering for the next lot of output
- */
- if (s->bbio != s->wbio)
- s->wbio = BIO_push(s->bbio, s->wbio);
- #ifndef OPENSSL_NO_SCTP
- }
- #endif
- if (SSL_IS_DTLS(s)) {
- /* Treat the next message as the first packet */
- s->first_packet = 1;
- }
- break;
- case TLS_ST_CW_KEY_EXCH:
- if (tls_client_key_exchange_post_work(s) == 0)
- return WORK_ERROR;
- break;
- case TLS_ST_CW_CHANGE:
- s->session->cipher = s->s3->tmp.new_cipher;
- #ifdef OPENSSL_NO_COMP
- s->session->compress_meth = 0;
- #else
- if (s->s3->tmp.new_compression == NULL)
- s->session->compress_meth = 0;
- else
- s->session->compress_meth = s->s3->tmp.new_compression->id;
- #endif
- if (!s->method->ssl3_enc->setup_key_block(s))
- return WORK_ERROR;
- if (!s->method->ssl3_enc->change_cipher_state(s,
- SSL3_CHANGE_CIPHER_CLIENT_WRITE))
- return WORK_ERROR;
- if (SSL_IS_DTLS(s)) {
- #ifndef OPENSSL_NO_SCTP
- if (s->hit) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
- #endif
- dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
- }
- break;
- case TLS_ST_CW_FINISHED:
- #ifndef OPENSSL_NO_SCTP
- if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
- /*
- * Change to new shared key of SCTP-Auth, will be ignored if
- * no SCTP used.
- */
- BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
- 0, NULL);
- }
- #endif
- if (statem_flush(s) != 1)
- return WORK_MORE_B;
- break;
- default:
- /* No post work to be done */
- break;
- }
- return WORK_FINISHED_CONTINUE;
- }
- /*
- * Construct a message to be sent from the client to the server.
- *
- * Valid return values are:
- * 1: Success
- * 0: Error
- */
- int ossl_statem_client_construct_message(SSL *s)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CW_CLNT_HELLO:
- return tls_construct_client_hello(s);
- case TLS_ST_CW_CERT:
- return tls_construct_client_certificate(s);
- case TLS_ST_CW_KEY_EXCH:
- return tls_construct_client_key_exchange(s);
- case TLS_ST_CW_CERT_VRFY:
- return tls_construct_client_verify(s);
- case TLS_ST_CW_CHANGE:
- if (SSL_IS_DTLS(s))
- return dtls_construct_change_cipher_spec(s);
- else
- return tls_construct_change_cipher_spec(s);
- #if !defined(OPENSSL_NO_NEXTPROTONEG)
- case TLS_ST_CW_NEXT_PROTO:
- return tls_construct_next_proto(s);
- #endif
- case TLS_ST_CW_FINISHED:
- return tls_construct_finished(s,
- s->method->
- ssl3_enc->client_finished_label,
- s->method->
- ssl3_enc->client_finished_label_len);
- default:
- /* Shouldn't happen */
- break;
- }
- return 0;
- }
- /*
- * Returns the maximum allowed length for the current message that we are
- * reading. Excludes the message header.
- */
- unsigned long ossl_statem_client_max_message_size(SSL *s)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return SERVER_HELLO_MAX_LENGTH;
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return HELLO_VERIFY_REQUEST_MAX_LENGTH;
- case TLS_ST_CR_CERT:
- return s->max_cert_list;
- case TLS_ST_CR_CERT_STATUS:
- return SSL3_RT_MAX_PLAIN_LENGTH;
- case TLS_ST_CR_KEY_EXCH:
- return SERVER_KEY_EXCH_MAX_LENGTH;
- case TLS_ST_CR_CERT_REQ:
- /* Set to s->max_cert_list for compatibility with previous releases.
- * In practice these messages can get quite long if servers are
- * configured to provide a long list of acceptable CAs
- */
- return s->max_cert_list;
- case TLS_ST_CR_SRVR_DONE:
- return SERVER_HELLO_DONE_MAX_LENGTH;
- case TLS_ST_CR_CHANGE:
- return CCS_MAX_LENGTH;
- case TLS_ST_CR_SESSION_TICKET:
- return SSL3_RT_MAX_PLAIN_LENGTH;
- case TLS_ST_CR_FINISHED:
- return FINISHED_MAX_LENGTH;
- default:
- /* Shouldn't happen */
- break;
- }
- return 0;
- }
- /*
- * Process a message that the client has been received from the server.
- */
- MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- case TLS_ST_CR_SRVR_HELLO:
- return tls_process_server_hello(s, pkt);
- case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
- return dtls_process_hello_verify(s, pkt);
- case TLS_ST_CR_CERT:
- return tls_process_server_certificate(s, pkt);
- case TLS_ST_CR_CERT_STATUS:
- return tls_process_cert_status(s, pkt);
- case TLS_ST_CR_KEY_EXCH:
- return tls_process_key_exchange(s, pkt);
- case TLS_ST_CR_CERT_REQ:
- return tls_process_certificate_request(s, pkt);
- case TLS_ST_CR_SRVR_DONE:
- return tls_process_server_done(s, pkt);
- case TLS_ST_CR_CHANGE:
- return tls_process_change_cipher_spec(s, pkt);
- case TLS_ST_CR_SESSION_TICKET:
- return tls_process_new_session_ticket(s, pkt);
- case TLS_ST_CR_FINISHED:
- return tls_process_finished(s, pkt);
- default:
- /* Shouldn't happen */
- break;
- }
- return MSG_PROCESS_ERROR;
- }
- /*
- * Perform any further processing required following the receipt of a message
- * from the server
- */
- WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
- {
- OSSL_STATEM *st = &s->statem;
- switch(st->hand_state) {
- #ifndef OPENSSL_NO_SCTP
- case TLS_ST_CR_SRVR_DONE:
- /* We only get here if we are using SCTP and we are renegotiating */
- if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
- s->s3->in_read_app_data = 2;
- s->rwstate = SSL_READING;
- BIO_clear_retry_flags(SSL_get_rbio(s));
- BIO_set_retry_read(SSL_get_rbio(s));
- ossl_statem_set_sctp_read_sock(s, 1);
- return WORK_MORE_A;
- }
- ossl_statem_set_sctp_read_sock(s, 0);
- return WORK_FINISHED_STOP;
- #endif
- default:
- break;
- }
- /* Shouldn't happen */
- return WORK_ERROR;
- }
- int tls_construct_client_hello(SSL *s)
- {
- unsigned char *buf;
- unsigned char *p, *d;
- int i;
- int protverr;
- unsigned long l;
- int al = 0;
- #ifndef OPENSSL_NO_COMP
- int j;
- SSL_COMP *comp;
- #endif
- SSL_SESSION *sess = s->session;
- buf = (unsigned char *)s->init_buf->data;
- /* Work out what SSL/TLS/DTLS version to use */
- protverr = ssl_set_client_hello_version(s);
- if (protverr != 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
- 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;
- /*
- * 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;
- }
- }
- } else
- i = 1;
- 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;
- }
- /* 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;
- #endif
- s2n(i, p);
- p += i;
- /* COMPRESSION */
- #ifdef OPENSSL_NO_COMP
- *(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;
- }
- #endif
- *(p++) = 0; /* Add the NULL method */
- /* 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_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- return 1;
- err:
- ossl_statem_set_error(s);
- return 0;
- }
- MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
- {
- int al;
- unsigned int cookie_len;
- PACKET cookiepkt;
- if (!PACKET_forward(pkt, 2)
- || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- cookie_len = PACKET_remaining(&cookiepkt);
- if (cookie_len > sizeof(s->d1->cookie)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
- goto f_err;
- }
- if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- s->d1->cookie_len = cookie_len;
- return MSG_PROCESS_FINISHED_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
- {
- STACK_OF(SSL_CIPHER) *sk;
- const SSL_CIPHER *c;
- PACKET session_id;
- size_t session_id_len;
- unsigned char *cipherchars;
- int i, al = SSL_AD_INTERNAL_ERROR;
- unsigned int compression;
- unsigned int sversion;
- int protverr;
- #ifndef OPENSSL_NO_COMP
- SSL_COMP *comp;
- #endif
- 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;
- }
- protverr = ssl_choose_client_version(s, sversion);
- if (protverr != 0) {
- al = SSL_AD_PROTOCOL_VERSION;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
- goto f_err;
- }
- /* load the server hello data */
- /* load the server random */
- 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. */
- if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_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_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_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- /*
- * Check if we can resume the session based on external pre-shared secret.
- * EAP-FAST (RFC 4851) supports two types of session resumption.
- * Resumption based on server-side state works with session IDs.
- * Resumption based on pre-shared Protected Access Credentials (PACs)
- * works by overriding the SessionTicket extension at the application
- * layer, and does not send a session ID. (We do not know whether EAP-FAST
- * servers would honour the session ID.) Therefore, the session ID alone
- * is not a reliable indicator of session resumption, so we first check if
- * we can resume, and later peek at the next handshake message to see if the
- * server wants to resume.
- */
- if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
- s->session->tlsext_tick) {
- const SSL_CIPHER *pref_cipher = NULL;
- s->session->master_key_length = sizeof(s->session->master_key);
- if (s->tls_session_secret_cb(s, s->session->master_key,
- &s->session->master_key_length,
- NULL, &pref_cipher,
- s->tls_session_secret_cb_arg)) {
- s->session->cipher = pref_cipher ?
- pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
- } else {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
- }
- 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_TLS_PROCESS_SERVER_HELLO,
- SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
- goto f_err;
- }
- s->hit = 1;
- } else {
- /*
- * If we were trying for session-id reuse but the server
- * didn't echo the ID, make a new SSL_SESSION.
- * In the case of EAP-FAST and PAC, we do not send a session ID,
- * so the PAC-based session secret is always preserved. It'll be
- * overwritten if the server refuses resumption.
- */
- if (s->session->session_id_length > 0) {
- if (!ssl_get_new_session(s, 0)) {
- goto f_err;
- }
- }
- 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);
- }
- c = ssl_get_cipher_by_char(s, cipherchars);
- if (c == NULL) {
- /* unknown cipher */
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
- goto f_err;
- }
- /* Set version disabled mask now we know version */
- if (!SSL_USE_TLS1_2_CIPHERS(s))
- s->s3->tmp.mask_ssl = SSL_TLSV1_2;
- else
- s->s3->tmp.mask_ssl = 0;
- /* Skip TLS v1.0 ciphersuites if SSLv3 */
- if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION)
- s->s3->tmp.mask_ssl |= SSL_TLSV1;
- /*
- * If it is a disabled cipher we didn't send it in client hello, so
- * return an error.
- */
- if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
- goto f_err;
- }
- 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_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
- goto f_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 != c->id)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
- goto f_err;
- }
- s->s3->tmp.new_cipher = c;
- /* lets get the compression algorithm */
- /* COMPRESSION */
- if (!PACKET_get_1(pkt, &compression)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
- al = SSL_AD_DECODE_ERROR;
- goto f_err;
- }
- #ifdef OPENSSL_NO_COMP
- if (compression != 0) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
- goto f_err;
- }
- /*
- * If compression is disabled we'd better not try to resume a session
- * using compression.
- */
- if (s->session->compress_meth != 0) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
- goto f_err;
- }
- #else
- if (s->hit && compression != s->session->compress_meth) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
- goto f_err;
- }
- if (compression == 0)
- comp = NULL;
- else if (!ssl_allow_compression(s)) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
- goto f_err;
- } else {
- comp = ssl3_comp_find(s->ctx->comp_methods, compression);
- }
- if (compression != 0 && comp == NULL) {
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
- SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
- goto f_err;
- } else {
- s->s3->tmp.new_compression = comp;
- }
- #endif
- /* TLS extensions */
- if (!ssl_parse_serverhello_tlsext(s, pkt)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
- goto err;
- }
- if (PACKET_remaining(pkt) != 0) {
- /* wrong packet length */
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
- goto f_err;
- }
- #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.
- */
- memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
- sizeof(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:
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
- {
- 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;
- if ((sk = sk_X509_new_null()) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- if (!PACKET_get_net_3(pkt, &cert_list_len)
- || PACKET_remaining(pkt) != cert_list_len) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- 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_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
- certstart = certbytes;
- x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
- if (x == NULL) {
- al = SSL_AD_BAD_CERTIFICATE;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
- goto f_err;
- }
- if (certbytes != (certstart + cert_len)) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_CERT_LENGTH_MISMATCH);
- goto f_err;
- }
- if (!sk_X509_push(sk, x)) {
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- x = NULL;
- }
- 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_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_TLS_PROCESS_SERVER_CERTIFICATE, i);
- al = SSL_AD_HANDSHAKE_FAILURE;
- goto f_err;
- }
- s->session->peer_chain = sk;
- /*
- * Inconsistency alert: cert_chain does include the peer's certificate,
- * which we don't include in s3_srvr.c
- */
- x = sk_X509_value(sk, 0);
- sk = NULL;
- /*
- * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
- */
- pkey = X509_get0_pubkey(x);
- if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
- x = NULL;
- al = SSL3_AL_FATAL;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
- goto f_err;
- }
- i = ssl_cert_type(x, pkey);
- if (i < 0) {
- x = NULL;
- al = SSL3_AL_FATAL;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_UNKNOWN_CERTIFICATE_TYPE);
- goto f_err;
- }
- exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
- if (exp_idx >= 0 && i != exp_idx
- && (exp_idx != SSL_PKEY_GOST_EC ||
- (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
- && i != SSL_PKEY_GOST01))) {
- x = NULL;
- al = SSL_AD_ILLEGAL_PARAMETER;
- SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
- SSL_R_WRONG_CERTIFICATE_TYPE);
- goto f_err;
- }
- s->session->peer_type = i;
- X509_free(s->session->peer);
- X509_up_ref(x);
- s->session->peer = x;
- s->session->verify_result = s->verify_result;
- x = NULL;
- ret = MSG_PROCESS_CONTINUE_READING;
- goto done;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- ossl_statem_set_error(s);
- done:
- X509_free(x);
- sk_X509_pop_free(sk, X509_free);
- return ret;
- }
- MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
- {
- EVP_MD_CTX *md_ctx;
- int al, j;
- 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_EC
- EVP_PKEY_CTX *pctx = NULL;
- #endif
- PACKET save_param_start, signature;
- md_ctx = EVP_MD_CTX_new();
- if (md_ctx == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- goto f_err;
- }
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- save_param_start = *pkt;
- #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY_free(s->s3->peer_tmp);
- s->s3->peer_tmp = NULL;
- #endif
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- al = SSL_AD_DECODE_ERROR;
- #ifndef OPENSSL_NO_PSK
- /* 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_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- /*
- * Store PSK identity hint for later use, hint is used in
- * ssl3_send_client_key_exchange. Assume that the maximum length of
- * a PSK identity hint can be as long as the maximum length of a PSK
- * identity.
- */
- if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG);
- goto f_err;
- }
- if (PACKET_remaining(&psk_identity_hint) == 0) {
- OPENSSL_free(s->session->psk_identity_hint);
- s->session->psk_identity_hint = NULL;
- } else if (!PACKET_strndup(&psk_identity_hint,
- &s->session->psk_identity_hint)) {
- al = SSL_AD_INTERNAL_ERROR;
- goto f_err;
- }
- }
- /* Nothing else to do for plain PSK or RSAPSK */
- if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
- } else
- #endif /* !OPENSSL_NO_PSK */
- /*
- * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_*
- * options
- */
- if (0) {
- }
- #ifndef OPENSSL_NO_SRP
- else if (alg_k & SSL_kSRP) {
- 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_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- 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_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
- if (!srp_verify_server_param(s, &al)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS);
- goto f_err;
- }
- /* We must check if there is a certificate */
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get0_pubkey(s->session->peer);
- }
- #endif /* !OPENSSL_NO_SRP */
- #ifndef OPENSSL_NO_DH
- else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
- PACKET prime, generator, pub_key;
- DH *dh;
- 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_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- s->s3->peer_tmp = EVP_PKEY_new();
- dh = DH_new();
- if (s->s3->peer_tmp == NULL || dh == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- DH_free(dh);
- goto err;
- }
- if (EVP_PKEY_assign_DH(s->s3->peer_tmp, dh) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- DH_free(dh);
- goto err;
- }
- 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_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB);
- goto err;
- }
- if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE);
- goto f_err;
- }
- if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
- al = SSL_AD_HANDSHAKE_FAILURE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL);
- goto f_err;
- }
- if (alg_a & (SSL_aRSA|SSL_aDSS))
- pkey = X509_get0_pubkey(s->session->peer);
- /* else anonymous DH, so no certificate or pkey. */
- }
- #endif /* !OPENSSL_NO_DH */
- #ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
- PACKET encoded_pt;
- unsigned char *ecparams;
- int curve_nid;
- /*
- * Extract elliptic curve parameters and the server's ephemeral ECDH
- * public key. For now we only support named (not generic) curves and
- * ECParameters in this case is just three bytes.
- */
- if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- /*
- * Check curve is one of our preferences, if not server has sent an
- * invalid curve. ECParameters is 3 bytes.
- */
- if (!tls1_check_curve(s, ecparams, 3)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE);
- goto f_err;
- }
- curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2));
- if (curve_nid == 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
- SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
- goto f_err;
- }
- /* Set up EVP_PKEY with named curve as parameters */
- pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
- if (pctx == NULL
- || EVP_PKEY_paramgen_init(pctx) <= 0
- || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
- || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto f_err;
- }
- EVP_PKEY_CTX_free(pctx);
- pctx = NULL;
- if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp),
- PACKET_data(&encoded_pt),
- PACKET_remaining(&encoded_pt), NULL) == 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT);
- goto f_err;
- }
- /*
- * The ECC/TLS specification does not mention the use of DSA to sign
- * ECParameters in the server key exchange message. We do support RSA
- * and ECDSA.
- */
- if (0) ;
- # ifndef OPENSSL_NO_RSA
- else if (alg_a & SSL_aRSA)
- pkey = X509_get0_pubkey(s->session->peer);
- # endif
- # ifndef OPENSSL_NO_EC
- else if (alg_a & SSL_aECDSA)
- pkey = X509_get0_pubkey(s->session->peer);
- # endif
- /* else anonymous ECDH, so no certificate or pkey. */
- } else if (alg_k) {
- al = SSL_AD_UNEXPECTED_MESSAGE;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
- goto f_err;
- }
- #endif /* !OPENSSL_NO_EC */
- /* 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_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- if (SSL_USE_SIGALGS(s)) {
- unsigned char *sigalgs;
- int rv;
- if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
- goto f_err;
- }
- rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
- if (rv == -1)
- goto err;
- else if (rv == 0) {
- goto f_err;
- }
- #ifdef SSL_DEBUG
- fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
- #endif
- } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
- md = EVP_md5_sha1();
- } else {
- md = EVP_sha1();
- }
- if (!PACKET_get_length_prefixed_2(pkt, &signature)
- || PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- 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 (PACKET_remaining(&signature) > (size_t)j) {
- /* wrong packet length */
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH);
- goto f_err;
- }
- if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
- || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
- SSL3_RANDOM_SIZE) <= 0
- || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
- SSL3_RANDOM_SIZE) <= 0
- || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
- PACKET_remaining(¶ms)) <= 0) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto f_err;
- }
- if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
- PACKET_remaining(&signature), pkey) <= 0) {
- /* bad signature */
- al = SSL_AD_DECRYPT_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
- goto f_err;
- }
- } else {
- /* 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_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- /* still data left over */
- if (PACKET_remaining(pkt) != 0) {
- SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
- goto f_err;
- }
- }
- EVP_MD_CTX_free(md_ctx);
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- #ifndef OPENSSL_NO_RSA
- RSA_free(rsa);
- #endif
- #ifndef OPENSSL_NO_EC
- EVP_PKEY_CTX_free(pctx);
- #endif
- EVP_MD_CTX_free(md_ctx);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
- {
- 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;
- if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- /* get the certificate types */
- 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_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- 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] = data[i];
- if (SSL_USE_SIGALGS(s)) {
- 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_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 ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- 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_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- } else {
- ssl_set_default_md(s);
- }
- /* get the CA RDNs */
- 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_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
- goto err;
- }
- 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_TLS_PROCESS_CERTIFICATE_REQUEST,
- SSL_R_LENGTH_MISMATCH);
- goto err;
- }
- namestart = namebytes;
- 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_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
- goto err;
- }
- if (namebytes != (namestart + name_len)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- 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_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- }
- /* we should setup a certificate to return.... */
- s->s3->tmp.cert_req = 1;
- s->s3->tmp.ctype_num = ctype_num;
- sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
- s->s3->tmp.ca_names = ca_sk;
- ca_sk = NULL;
- ret = MSG_PROCESS_CONTINUE_READING;
- goto done;
- err:
- ossl_statem_set_error(s);
- done:
- 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));
- }
- MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
- {
- int al;
- unsigned int ticklen;
- unsigned long ticket_lifetime_hint;
- 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_TLS_PROCESS_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 MSG_PROCESS_CONTINUE_READING;
- 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 == NULL) {
- SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- 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
- * 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 (or SHA1 is
- * SHA256 is disabled) hash of the ticket.
- */
- EVP_Digest(s->session->tlsext_tick, ticklen,
- s->session->session_id, &s->session->session_id_length,
- EVP_sha256(), NULL);
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- err:
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
- {
- int al;
- unsigned long resplen;
- unsigned int type;
- 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;
- }
- if (!PACKET_get_net_3(pkt, &resplen)
- || PACKET_remaining(pkt) != resplen) {
- al = SSL_AD_DECODE_ERROR;
- SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
- goto f_err;
- }
- s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
- if (s->tlsext_ocsp_resp == NULL) {
- al = SSL_AD_INTERNAL_ERROR;
- 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;
- return MSG_PROCESS_CONTINUE_READING;
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
- {
- if (PACKET_remaining(pkt) > 0) {
- /* should contain no data */
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- #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);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- }
- #endif
- /*
- * at this point we check that we have the required stuff from
- * the server
- */
- if (!ssl3_check_cert_and_algorithm(s)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
- ossl_statem_set_error(s);
- return MSG_PROCESS_ERROR;
- }
- /*
- * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
- * |tlsext_ocsp_resplen| values will be set if we actually received a status
- * message, or NULL and -1 otherwise
- */
- if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
- int ret;
- ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
- if (ret == 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL,
- SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
- SSL_R_INVALID_STATUS_RESPONSE);
- return MSG_PROCESS_ERROR;
- }
- if (ret < 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
- return MSG_PROCESS_ERROR;
- }
- }
- #ifndef OPENSSL_NO_SCTP
- /* Only applies to renegotiation */
- if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
- && s->renegotiate != 0)
- return MSG_PROCESS_CONTINUE_PROCESSING;
- else
- #endif
- return MSG_PROCESS_FINISHED_READING;
- }
- 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;
- EVP_PKEY *pkey = NULL;
- EVP_PKEY_CTX *pctx = NULL;
- #endif
- #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY *ckey = NULL, *skey = NULL;
- #endif
- #ifndef OPENSSL_NO_EC
- unsigned char *encodedPoint = NULL;
- int encoded_pt_len = 0;
- #endif
- unsigned char *pms = NULL;
- size_t pmslen = 0;
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- p = ssl_handshake_start(s);
- #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;
- }
- memset(identity, 0, sizeof(identity));
- psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
- identity, sizeof(identity) - 1,
- psk, sizeof(psk));
- 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;
- }
- OPENSSL_free(s->s3->tmp.psk);
- s->s3->tmp.psk = OPENSSL_memdup(psk, psklen);
- OPENSSL_cleanse(psk, psklen);
- if (s->s3->tmp.psk == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
- s->s3->tmp.psklen = psklen;
- 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 = OPENSSL_strdup(identity);
- if (s->session->psk_identity == NULL) {
- OPENSSL_cleanse(identity, sizeof(identity));
- goto memerr;
- }
- 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
- /* Fool emacs indentation */
- if (0) {
- }
- #ifndef OPENSSL_NO_RSA
- else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
- size_t enclen;
- pmslen = SSL_MAX_MASTER_KEY_LENGTH;
- pms = OPENSSL_malloc(pmslen);
- if (pms == NULL)
- goto memerr;
- if (s->session->peer == NULL) {
- /*
- * We should always have a server certificate with SSL_kRSA.
- */
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- pkey = X509_get0_pubkey(s->session->peer);
- if (EVP_PKEY_get0_RSA(pkey) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- 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;
- pctx = EVP_PKEY_CTX_new(pkey, NULL);
- if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
- || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_EVP_LIB);
- goto err;
- }
- if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- SSL_R_BAD_RSA_ENCRYPT);
- goto err;
- }
- n = enclen;
- EVP_PKEY_CTX_free(pctx);
- pctx = NULL;
- # 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
- /* 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_kDHEPSK)) {
- DH *dh_clnt = NULL;
- skey = s->s3->peer_tmp;
- if (skey == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- ckey = ssl_generate_pkey(skey, NID_undef);
- dh_clnt = EVP_PKEY_get0_DH(ckey);
- if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- /* send off the data */
- n = BN_num_bytes(dh_clnt->pub_key);
- s2n(n, p);
- BN_bn2bin(dh_clnt->pub_key, p);
- n += 2;
- EVP_PKEY_free(ckey);
- ckey = NULL;
- }
- #endif
- #ifndef OPENSSL_NO_EC
- else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) {
- if (s->s3->peer_tmp != NULL) {
- skey = s->s3->peer_tmp;
- } else {
- /* Get the Server Public Key from Cert */
- skey = X509_get0_pubkey(s->session->peer);
- if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- }
- ckey = ssl_generate_pkey(skey, NID_undef);
- if (ssl_derive(s, ckey, skey) == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB);
- goto err;
- }
- /* Generate encoding of client key */
- encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey),
- POINT_CONVERSION_UNCOMPRESSED,
- &encodedPoint, NULL);
- if (encoded_pt_len == 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB);
- goto err;
- }
- EVP_PKEY_free(ckey);
- ckey = NULL;
- n = encoded_pt_len;
- *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;
- /* Free allocated memory */
- OPENSSL_free(encodedPoint);
- }
- #endif /* !OPENSSL_NO_EC */
- #ifndef OPENSSL_NO_GOST
- 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;
- int dgst_nid = NID_id_GostR3411_94;
- if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
- dgst_nid = NID_id_GostR3411_2012_256;
- pmslen = 32;
- pms = OPENSSL_malloc(pmslen);
- if (pms == NULL)
- 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;
- }
- pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
- if (pkey_ctx == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- 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 (pkey_ctx == NULL
- || EVP_PKEY_encrypt_init(pkey_ctx) <= 0
- /* Generate session key */
- || 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 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();
- }
- }
- /*
- * Compute shared IV and store it in algorithm-specific context
- * data
- */
- ukm_hash = EVP_MD_CTX_new();
- if (EVP_DigestInit(ukm_hash,
- EVP_get_digestbynid(dgst_nid)) <= 0
- || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
- SSL3_RANDOM_SIZE) <= 0
- || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
- SSL3_RANDOM_SIZE) <= 0
- || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
- EVP_MD_CTX_free(ukm_hash);
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE,
- ERR_R_INTERNAL_ERROR);
- goto err;
- }
- EVP_MD_CTX_free(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;
- }
- /* 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;
- }
- 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);
- }
- #endif
- #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 = OPENSSL_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;
- }
- }
- #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;
- }
- if (pms != NULL) {
- 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_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
- err:
- OPENSSL_clear_free(pms, pmslen);
- s->s3->tmp.pms = NULL;
- #ifndef OPENSSL_NO_RSA
- EVP_PKEY_CTX_free(pctx);
- #endif
- #ifndef OPENSSL_NO_EC
- OPENSSL_free(encodedPoint);
- #endif
- #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
- EVP_PKEY_free(ckey);
- #endif
- #ifndef OPENSSL_NO_PSK
- OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
- s->s3->tmp.psk = NULL;
- #endif
- ossl_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;
- }
- #ifndef OPENSSL_NO_SCTP
- if (SSL_IS_DTLS(s)) {
- 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.
- */
- memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
- sizeof(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 1;
- err:
- OPENSSL_clear_free(pms, pmslen);
- s->s3->tmp.pms = NULL;
- return 0;
- }
- int tls_construct_client_verify(SSL *s)
- {
- unsigned char *p;
- EVP_PKEY *pkey;
- const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
- EVP_MD_CTX *mctx;
- unsigned u = 0;
- unsigned long n = 0;
- long hdatalen = 0;
- void *hdata;
- mctx = EVP_MD_CTX_new();
- if (mctx == NULL) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
- goto err;
- }
- p = ssl_handshake_start(s);
- pkey = s->cert->key->privatekey;
- hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
- if (hdatalen <= 0) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- if (SSL_USE_SIGALGS(s)) {
- if (!tls12_get_sigandhash(p, pkey, md)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
- goto err;
- }
- p += 2;
- n = 2;
- }
- #ifdef SSL_DEBUG
- fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
- #endif
- if (!EVP_SignInit_ex(mctx, md, NULL)
- || !EVP_SignUpdate(mctx, hdata, hdatalen)
- || (s->version == SSL3_VERSION
- && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
- s->session->master_key_length,
- s->session->master_key))
- || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
- SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
- goto err;
- }
- #ifndef OPENSSL_NO_GOST
- {
- int pktype = EVP_PKEY_id(pkey);
- if (pktype == NID_id_GostR3410_2001
- || pktype == NID_id_GostR3410_2012_256
- || pktype == NID_id_GostR3410_2012_512)
- BUF_reverse(p + 2, NULL, u);
- }
- #endif
- s2n(u, p);
- n += u + 2;
- /* Digest cached records and discard handshake buffer */
- if (!ssl3_digest_cached_records(s, 0))
- 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_free(mctx);
- return 1;
- err:
- EVP_MD_CTX_free(mctx);
- return 0;
- }
- /*
- * Check a certificate can be used for client authentication. Currently check
- * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
- * certificates can be used and optionally checks suitability for Suite B.
- */
- static int ssl3_check_client_certificate(SSL *s)
- {
- if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
- return 0;
- /* If no suitable signature algorithm can't use certificate */
- if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
- return 0;
- /*
- * If strict mode check suitability of chain before using it. This also
- * adjusts suite B digest if necessary.
- */
- if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
- !tls1_check_chain(s, NULL, NULL, NULL, -2))
- return 0;
- return 1;
- }
- WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
- {
- X509 *x509 = NULL;
- EVP_PKEY *pkey = NULL;
- int i;
- 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 WORK_MORE_A;
- }
- if (i == 0) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- ossl_statem_set_error(s);
- return 0;
- }
- s->rwstate = SSL_NOTHING;
- }
- if (ssl3_check_client_certificate(s))
- return WORK_FINISHED_CONTINUE;
- /* Fall through to WORK_MORE_B */
- wst = WORK_MORE_B;
- }
- /* We need to get a client cert */
- 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 = ssl_do_client_cert_cb(s, &x509, &pkey);
- if (i < 0) {
- s->rwstate = SSL_X509_LOOKUP;
- return WORK_MORE_B;
- }
- s->rwstate = SSL_NOTHING;
- if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
- if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
- i = 0;
- } else if (i == 1) {
- i = 0;
- SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
- SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
- }
- X509_free(x509);
- EVP_PKEY_free(pkey);
- if (i && !ssl3_check_client_certificate(s))
- i = 0;
- if (i == 0) {
- if (s->version == SSL3_VERSION) {
- s->s3->tmp.cert_req = 0;
- ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
- return WORK_FINISHED_CONTINUE;
- } else {
- s->s3->tmp.cert_req = 2;
- if (!ssl3_digest_cached_records(s, 0)) {
- ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
- ossl_statem_set_error(s);
- return 0;
- }
- }
- }
- return WORK_FINISHED_CONTINUE;
- }
- /* 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);
- ossl_statem_set_error(s);
- return 0;
- }
- return 1;
- }
- #define has_bits(i,m) (((i)&(m)) == (m))
- int ssl3_check_cert_and_algorithm(SSL *s)
- {
- int i;
- #ifndef OPENSSL_NO_EC
- int idx;
- #endif
- long alg_k, alg_a;
- EVP_PKEY *pkey = NULL;
- int al = SSL_AD_HANDSHAKE_FAILURE;
- alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
- alg_a = s->s3->tmp.new_cipher->algorithm_auth;
- /* we don't have a certificate */
- if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
- return (1);
- /* This is the passed certificate */
- #ifndef OPENSSL_NO_EC
- idx = s->session->peer_type;
- if (idx == SSL_PKEY_ECC) {
- 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;
- } else {
- return 1;
- }
- } else if (alg_a & SSL_aECDSA) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_ECDSA_SIGNING_CERT);
- goto f_err;
- } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT);
- goto f_err;
- }
- #endif
- pkey = X509_get0_pubkey(s->session->peer);
- i = X509_certificate_type(s->session->peer, pkey);
- /* Check that we have a certificate if we require one */
- if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_RSA_SIGNING_CERT);
- goto f_err;
- }
- #ifndef OPENSSL_NO_DSA
- else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
- SSL_R_MISSING_DSA_SIGNING_CERT);
- goto f_err;
- }
- #endif
- #ifndef OPENSSL_NO_RSA
- if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
- !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;
- }
- #endif
- #ifndef OPENSSL_NO_DH
- if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
- al = SSL_AD_INTERNAL_ERROR;
- SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
- goto f_err;
- }
- #endif
- return (1);
- f_err:
- ssl3_send_alert(s, SSL3_AL_FATAL, al);
- return (0);
- }
- #ifndef OPENSSL_NO_NEXTPROTONEG
- 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)
- {
- 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;
- }
- int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
- unsigned char *p)
- {
- int i, j = 0;
- const SSL_CIPHER *c;
- unsigned char *q;
- int empty_reneg_info_scsv = !s->renegotiate;
- /* Set disabled masks for this session */
- ssl_set_client_disabled(s);
- if (sk == NULL)
- return (0);
- q = p;
- for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
- c = sk_SSL_CIPHER_value(sk, i);
- /* Skip disabled ciphers */
- if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
- continue;
- #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
- if (c->id == SSL3_CK_SCSV) {
- if (!empty_reneg_info_scsv)
- continue;
- else
- empty_reneg_info_scsv = 0;
- }
- #endif
- j = s->method->put_cipher_by_char(c, p);
- p += j;
- }
- /*
- * If p == q, no ciphers; caller indicates an error. Otherwise, add
- * applicable SCSVs.
- */
- if (p != q) {
- if (empty_reneg_info_scsv) {
- static SSL_CIPHER scsv = {
- 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
- #ifdef OPENSSL_RI_DEBUG
- fprintf(stderr,
- "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n");
- #endif
- }
- if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
- static SSL_CIPHER scsv = {
- 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- j = s->method->put_cipher_by_char(&scsv, p);
- p += j;
- }
- }
- return (p - q);
- }
|