diff options
Diffstat (limited to 'openssl/ssl/s3_srvr.c')
| -rw-r--r-- | openssl/ssl/s3_srvr.c | 3314 |
1 files changed, 0 insertions, 3314 deletions
diff --git a/openssl/ssl/s3_srvr.c b/openssl/ssl/s3_srvr.c deleted file mode 100644 index 60591622..00000000 --- a/openssl/ssl/s3_srvr.c +++ /dev/null @@ -1,3314 +0,0 @@ -/* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */ -/* 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. - */ - -#define REUSE_CIPHER_BUG -#define NETSCAPE_HANG_BUG - -#include <stdio.h> -#include "ssl_locl.h" -#include "kssl_lcl.h" -#include <openssl/buffer.h> -#include <openssl/rand.h> -#include <openssl/objects.h> -#include <openssl/evp.h> -#include <openssl/hmac.h> -#include <openssl/x509.h> -#ifndef OPENSSL_NO_DH -#include <openssl/dh.h> -#endif -#include <openssl/bn.h> -#ifndef OPENSSL_NO_KRB5 -#include <openssl/krb5_asn.h> -#endif -#include <openssl/md5.h> - -static const SSL_METHOD *ssl3_get_server_method(int ver); - -static const SSL_METHOD *ssl3_get_server_method(int ver) - { - if (ver == SSL3_VERSION) - return(SSLv3_server_method()); - else - return(NULL); - } - -IMPLEMENT_ssl3_meth_func(SSLv3_server_method, - ssl3_accept, - ssl_undefined_function, - ssl3_get_server_method) - -int ssl3_accept(SSL *s) - { - BUF_MEM *buf; - unsigned long alg_k,Time=(unsigned long)time(NULL); - void (*cb)(const SSL *ssl,int type,int val)=NULL; - int ret= -1; - int new_state,state,skip=0; - - RAND_add(&Time,sizeof(Time),0); - ERR_clear_error(); - clear_sys_error(); - - if (s->info_callback != NULL) - cb=s->info_callback; - else if (s->ctx->info_callback != NULL) - cb=s->ctx->info_callback; - - /* init things to blank */ - s->in_handshake++; - if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); - - if (s->cert == NULL) - { - SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); - return(-1); - } - - for (;;) - { - state=s->state; - - switch (s->state) - { - case SSL_ST_RENEGOTIATE: - s->new_session=1; - /* s->state=SSL_ST_ACCEPT; */ - - case SSL_ST_BEFORE: - case SSL_ST_ACCEPT: - case SSL_ST_BEFORE|SSL_ST_ACCEPT: - case SSL_ST_OK|SSL_ST_ACCEPT: - - s->server=1; - if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); - - if ((s->version>>8) != 3) - { - SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); - return -1; - } - s->type=SSL_ST_ACCEPT; - - if (s->init_buf == NULL) - { - if ((buf=BUF_MEM_new()) == NULL) - { - ret= -1; - goto end; - } - if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) - { - ret= -1; - goto end; - } - s->init_buf=buf; - } - - if (!ssl3_setup_buffers(s)) - { - ret= -1; - goto end; - } - - s->init_num=0; - - if (s->state != SSL_ST_RENEGOTIATE) - { - /* Ok, we now need to push on a buffering BIO so that - * the output is sent in a way that TCP likes :-) - */ - if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } - - ssl3_init_finished_mac(s); - s->state=SSL3_ST_SR_CLNT_HELLO_A; - s->ctx->stats.sess_accept++; - } - else if (!s->s3->send_connection_binding && - !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) - { - /* Server attempting to renegotiate with - * client that doesn't support secure - * renegotiation. - */ - SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); - ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); - ret = -1; - goto end; - } - else - { - /* s->state == SSL_ST_RENEGOTIATE, - * we will just send a HelloRequest */ - s->ctx->stats.sess_accept_renegotiate++; - s->state=SSL3_ST_SW_HELLO_REQ_A; - } - break; - - case SSL3_ST_SW_HELLO_REQ_A: - case SSL3_ST_SW_HELLO_REQ_B: - - s->shutdown=0; - ret=ssl3_send_hello_request(s); - if (ret <= 0) goto end; - s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; - s->state=SSL3_ST_SW_FLUSH; - s->init_num=0; - - ssl3_init_finished_mac(s); - break; - - case SSL3_ST_SW_HELLO_REQ_C: - s->state=SSL_ST_OK; - break; - - case SSL3_ST_SR_CLNT_HELLO_A: - case SSL3_ST_SR_CLNT_HELLO_B: - case SSL3_ST_SR_CLNT_HELLO_C: - - s->shutdown=0; - ret=ssl3_get_client_hello(s); - if (ret <= 0) goto end; - - s->new_session = 2; - s->state=SSL3_ST_SW_SRVR_HELLO_A; - s->init_num=0; - break; - - case SSL3_ST_SW_SRVR_HELLO_A: - case SSL3_ST_SW_SRVR_HELLO_B: - ret=ssl3_send_server_hello(s); - if (ret <= 0) goto end; -#ifndef OPENSSL_NO_TLSEXT - if (s->hit) - { - if (s->tlsext_ticket_expected) - s->state=SSL3_ST_SW_SESSION_TICKET_A; - else - s->state=SSL3_ST_SW_CHANGE_A; - } -#else - if (s->hit) - s->state=SSL3_ST_SW_CHANGE_A; -#endif - else - s->state=SSL3_ST_SW_CERT_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_A: - case SSL3_ST_SW_CERT_B: - /* Check if it is anon DH or anon ECDH, */ - /* normal PSK or KRB5 */ - if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) - && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) - && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) - { - ret=ssl3_send_server_certificate(s); - if (ret <= 0) goto end; -#ifndef OPENSSL_NO_TLSEXT - if (s->tlsext_status_expected) - s->state=SSL3_ST_SW_CERT_STATUS_A; - else - s->state=SSL3_ST_SW_KEY_EXCH_A; - } - else - { - skip = 1; - s->state=SSL3_ST_SW_KEY_EXCH_A; - } -#else - } - else - skip=1; - - s->state=SSL3_ST_SW_KEY_EXCH_A; -#endif - s->init_num=0; - break; - - case SSL3_ST_SW_KEY_EXCH_A: - case SSL3_ST_SW_KEY_EXCH_B: - alg_k = s->s3->tmp.new_cipher->algorithm_mkey; - - /* clear this, it may get reset by - * send_server_key_exchange */ - if ((s->options & SSL_OP_EPHEMERAL_RSA) -#ifndef OPENSSL_NO_KRB5 - && !(alg_k & SSL_kKRB5) -#endif /* OPENSSL_NO_KRB5 */ - ) - /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key - * even when forbidden by protocol specs - * (handshake may fail as clients are not required to - * be able to handle this) */ - s->s3->tmp.use_rsa_tmp=1; - else - s->s3->tmp.use_rsa_tmp=0; - - - /* only send if a DH key exchange, fortezza or - * RSA but we have a sign only certificate - * - * PSK: may send PSK identity hints - * - * For ECC ciphersuites, we send a serverKeyExchange - * message only if the cipher suite is either - * ECDH-anon or ECDHE. In other cases, the - * server certificate contains the server's - * public key for key exchange. - */ - if (s->s3->tmp.use_rsa_tmp - /* PSK: send ServerKeyExchange if PSK identity - * hint if provided */ -#ifndef OPENSSL_NO_PSK - || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) -#endif - || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH)) - || (alg_k & SSL_kEECDH) - || ((alg_k & SSL_kRSA) - && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL - || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) - && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) - ) - ) - ) - ) - { - ret=ssl3_send_server_key_exchange(s); - if (ret <= 0) goto end; - } - else - skip=1; - - s->state=SSL3_ST_SW_CERT_REQ_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_REQ_A: - case SSL3_ST_SW_CERT_REQ_B: - if (/* don't request cert unless asked for it: */ - !(s->verify_mode & SSL_VERIFY_PEER) || - /* if SSL_VERIFY_CLIENT_ONCE is set, - * don't request cert during re-negotiation: */ - ((s->session->peer != NULL) && - (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || - /* never request cert in anonymous ciphersuites - * (see section "Certificate request" in SSL 3 drafts - * and in RFC 2246): */ - ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && - /* ... except when the application insists on verification - * (against the specs, but s3_clnt.c accepts this for SSL 3) */ - !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || - /* never request cert in Kerberos ciphersuites */ - (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) - /* With normal PSK Certificates and - * Certificate Requests are omitted */ - || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) - { - /* no cert request */ - skip=1; - s->s3->tmp.cert_request=0; - s->state=SSL3_ST_SW_SRVR_DONE_A; - } - else - { - s->s3->tmp.cert_request=1; - ret=ssl3_send_certificate_request(s); - if (ret <= 0) goto end; -#ifndef NETSCAPE_HANG_BUG - s->state=SSL3_ST_SW_SRVR_DONE_A; -#else - s->state=SSL3_ST_SW_FLUSH; - s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; -#endif - s->init_num=0; - } - break; - - case SSL3_ST_SW_SRVR_DONE_A: - case SSL3_ST_SW_SRVR_DONE_B: - ret=ssl3_send_server_done(s); - if (ret <= 0) goto end; - s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; - s->state=SSL3_ST_SW_FLUSH; - s->init_num=0; - break; - - case SSL3_ST_SW_FLUSH: - - /* This code originally checked to see if - * any data was pending using BIO_CTRL_INFO - * and then flushed. This caused problems - * as documented in PR#1939. The proposed - * fix doesn't completely resolve this issue - * as buggy implementations of BIO_CTRL_PENDING - * still exist. So instead we just flush - * unconditionally. - */ - - s->rwstate=SSL_WRITING; - if (BIO_flush(s->wbio) <= 0) - { - ret= -1; - goto end; - } - s->rwstate=SSL_NOTHING; - - s->state=s->s3->tmp.next_state; - break; - - case SSL3_ST_SR_CERT_A: - case SSL3_ST_SR_CERT_B: - /* Check for second client hello (MS SGC) */ - ret = ssl3_check_client_hello(s); - if (ret <= 0) - goto end; - if (ret == 2) - s->state = SSL3_ST_SR_CLNT_HELLO_C; - else { - if (s->s3->tmp.cert_request) - { - ret=ssl3_get_client_certificate(s); - if (ret <= 0) goto end; - } - s->init_num=0; - s->state=SSL3_ST_SR_KEY_EXCH_A; - } - break; - - case SSL3_ST_SR_KEY_EXCH_A: - case SSL3_ST_SR_KEY_EXCH_B: - ret=ssl3_get_client_key_exchange(s); - if (ret <= 0) - goto end; - if (ret == 2) - { - /* For the ECDH ciphersuites when - * the client sends its ECDH pub key in - * a certificate, the CertificateVerify - * message is not sent. - * Also for GOST ciphersuites when - * the client uses its key from the certificate - * for key exchange. - */ -#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) - s->state=SSL3_ST_SR_FINISHED_A; -#else - if (s->s3->next_proto_neg_seen) - s->state=SSL3_ST_SR_NEXT_PROTO_A; - else - s->state=SSL3_ST_SR_FINISHED_A; -#endif - s->init_num = 0; - } - else - { - int offset=0; - int dgst_num; - - s->state=SSL3_ST_SR_CERT_VRFY_A; - s->init_num=0; - - /* We need to get hashes here so if there is - * a client cert, it can be verified - * FIXME - digest processing for CertificateVerify - * should be generalized. But it is next step - */ - if (s->s3->handshake_buffer) - if (!ssl3_digest_cached_records(s)) - return -1; - for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) - if (s->s3->handshake_dgst[dgst_num]) - { - int dgst_size; - - s->method->ssl3_enc->cert_verify_mac(s,EVP_MD_CTX_type(s->s3->handshake_dgst[dgst_num]),&(s->s3->tmp.cert_verify_md[offset])); - dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); - if (dgst_size < 0) - { - ret = -1; - goto end; - } - offset+=dgst_size; - } - } - break; - - case SSL3_ST_SR_CERT_VRFY_A: - case SSL3_ST_SR_CERT_VRFY_B: - - /* we should decide if we expected this one */ - ret=ssl3_get_cert_verify(s); - if (ret <= 0) goto end; - -#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) - s->state=SSL3_ST_SR_FINISHED_A; -#else - if (s->s3->next_proto_neg_seen) - s->state=SSL3_ST_SR_NEXT_PROTO_A; - else - s->state=SSL3_ST_SR_FINISHED_A; -#endif - s->init_num=0; - break; - -#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) - case SSL3_ST_SR_NEXT_PROTO_A: - case SSL3_ST_SR_NEXT_PROTO_B: - ret=ssl3_get_next_proto(s); - if (ret <= 0) goto end; - s->init_num = 0; - s->state=SSL3_ST_SR_FINISHED_A; - break; -#endif - - case SSL3_ST_SR_FINISHED_A: - case SSL3_ST_SR_FINISHED_B: - ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, - SSL3_ST_SR_FINISHED_B); - if (ret <= 0) goto end; -#ifndef OPENSSL_NO_TLSEXT - if (s->tlsext_ticket_expected) - s->state=SSL3_ST_SW_SESSION_TICKET_A; - else if (s->hit) - s->state=SSL_ST_OK; -#else - if (s->hit) - s->state=SSL_ST_OK; -#endif - else - s->state=SSL3_ST_SW_CHANGE_A; - s->init_num=0; - break; - -#ifndef OPENSSL_NO_TLSEXT - case SSL3_ST_SW_SESSION_TICKET_A: - case SSL3_ST_SW_SESSION_TICKET_B: - ret=ssl3_send_newsession_ticket(s); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_CHANGE_A; - s->init_num=0; - break; - - case SSL3_ST_SW_CERT_STATUS_A: - case SSL3_ST_SW_CERT_STATUS_B: - ret=ssl3_send_cert_status(s); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_KEY_EXCH_A; - s->init_num=0; - break; - -#endif - - case SSL3_ST_SW_CHANGE_A: - case SSL3_ST_SW_CHANGE_B: - - s->session->cipher=s->s3->tmp.new_cipher; - if (!s->method->ssl3_enc->setup_key_block(s)) - { ret= -1; goto end; } - - ret=ssl3_send_change_cipher_spec(s, - SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); - - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_FINISHED_A; - s->init_num=0; - - if (!s->method->ssl3_enc->change_cipher_state(s, - SSL3_CHANGE_CIPHER_SERVER_WRITE)) - { - ret= -1; - goto end; - } - - break; - - case SSL3_ST_SW_FINISHED_A: - case SSL3_ST_SW_FINISHED_B: - ret=ssl3_send_finished(s, - SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, - s->method->ssl3_enc->server_finished_label, - s->method->ssl3_enc->server_finished_label_len); - if (ret <= 0) goto end; - s->state=SSL3_ST_SW_FLUSH; - if (s->hit) - { -#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) - s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; -#else - if (s->s3->next_proto_neg_seen) - s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A; - else - s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; -#endif - } - else - s->s3->tmp.next_state=SSL_ST_OK; - s->init_num=0; - break; - - case SSL_ST_OK: - /* clean a few things up */ - ssl3_cleanup_key_block(s); - - BUF_MEM_free(s->init_buf); - s->init_buf=NULL; - - /* remove buffering on output */ - ssl_free_wbio_buffer(s); - - s->init_num=0; - - if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ - { - /* actually not necessarily a 'new' session unless - * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ - - s->new_session=0; - - ssl_update_cache(s,SSL_SESS_CACHE_SERVER); - - s->ctx->stats.sess_accept_good++; - /* s->server=1; */ - s->handshake_func=ssl3_accept; - - if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); - } - - ret = 1; - goto end; - /* break; */ - - default: - SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); - ret= -1; - goto end; - /* break; */ - } - - if (!s->s3->tmp.reuse_message && !skip) - { - if (s->debug) - { - if ((ret=BIO_flush(s->wbio)) <= 0) - goto end; - } - - - if ((cb != NULL) && (s->state != state)) - { - new_state=s->state; - s->state=state; - cb(s,SSL_CB_ACCEPT_LOOP,1); - s->state=new_state; - } - } - skip=0; - } -end: - /* BIO_flush(s->wbio); */ - - s->in_handshake--; - if (cb != NULL) - cb(s,SSL_CB_ACCEPT_EXIT,ret); - return(ret); - } - -int ssl3_send_hello_request(SSL *s) - { - unsigned char *p; - - if (s->state == SSL3_ST_SW_HELLO_REQ_A) - { - p=(unsigned char *)s->init_buf->data; - *(p++)=SSL3_MT_HELLO_REQUEST; - *(p++)=0; - *(p++)=0; - *(p++)=0; - - s->state=SSL3_ST_SW_HELLO_REQ_B; - /* number of bytes to write */ - s->init_num=4; - s->init_off=0; - } - - /* SSL3_ST_SW_HELLO_REQ_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int ssl3_check_client_hello(SSL *s) - { - int ok; - long n; - - /* this function is called when we really expect a Certificate message, - * so permit appropriate message length */ - n=s->method->ssl_get_message(s, - SSL3_ST_SR_CERT_A, - SSL3_ST_SR_CERT_B, - -1, - s->max_cert_list, - &ok); - if (!ok) return((int)n); - s->s3->tmp.reuse_message = 1; - if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) - { - /* Throw away what we have done so far in the current handshake, - * which will now be aborted. (A full SSL_clear would be too much.) */ -#ifndef OPENSSL_NO_DH - if (s->s3->tmp.dh != NULL) - { - DH_free(s->s3->tmp.dh); - s->s3->tmp.dh = NULL; - } -#endif -#ifndef OPENSSL_NO_ECDH - if (s->s3->tmp.ecdh != NULL) - { - EC_KEY_free(s->s3->tmp.ecdh); - s->s3->tmp.ecdh = NULL; - } -#endif - return 2; - } - return 1; -} - -int ssl3_get_client_hello(SSL *s) - { - int i,j,ok,al,ret= -1; - unsigned int cookie_len; - long n; - unsigned long id; - unsigned char *p,*d,*q; - SSL_CIPHER *c; -#ifndef OPENSSL_NO_COMP - SSL_COMP *comp=NULL; -#endif - STACK_OF(SSL_CIPHER) *ciphers=NULL; - - /* We do this so that we will respond with our native type. - * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, - * This down switching should be handled by a different method. - * If we are SSLv3, we will respond with SSLv3, even if prompted with - * TLSv1. - */ - if (s->state == SSL3_ST_SR_CLNT_HELLO_A) - { - s->state=SSL3_ST_SR_CLNT_HELLO_B; - } - s->first_packet=1; - n=s->method->ssl_get_message(s, - SSL3_ST_SR_CLNT_HELLO_B, - SSL3_ST_SR_CLNT_HELLO_C, - SSL3_MT_CLIENT_HELLO, - SSL3_RT_MAX_PLAIN_LENGTH, - &ok); - - if (!ok) return((int)n); - s->first_packet=0; - d=p=(unsigned char *)s->init_msg; - - /* use version from inside client hello, not from record header - * (may differ: see RFC 2246, Appendix E, second paragraph) */ - s->client_version=(((int)p[0])<<8)|(int)p[1]; - p+=2; - - if ((s->version == DTLS1_VERSION && s->client_version > s->version) || - (s->version != DTLS1_VERSION && s->client_version < s->version)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); - if ((s->client_version>>8) == SSL3_VERSION_MAJOR) - { - /* similar to ssl3_get_record, send alert using remote version number */ - s->version = s->client_version; - } - al = SSL_AD_PROTOCOL_VERSION; - goto f_err; - } - - /* If we require cookies and this ClientHello doesn't - * contain one, just return since we do not want to - * allocate any memory yet. So check cookie length... - */ - if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) - { - unsigned int session_length, cookie_length; - - session_length = *(p + SSL3_RANDOM_SIZE); - cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1); - - if (cookie_length == 0) - return 1; - } - - /* load the client random */ - memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); - p+=SSL3_RANDOM_SIZE; - - /* get the session-id */ - j= *(p++); - - s->hit=0; - /* Versions before 0.9.7 always allow session reuse during renegotiation - * (i.e. when s->new_session is true), option - * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. - * Maybe this optional behaviour should always have been the default, - * but we cannot safely change the default behaviour (or new applications - * might be written that become totally unsecure when compiled with - * an earlier library version) - */ - if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) - { - if (!s->session_creation_enabled) - { - ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); - goto err; - } - if (!ssl_get_new_session(s,1)) - goto err; - } - else - { - i=ssl_get_prev_session(s, p, j, d + n); - if (i == 1) - { /* previous session */ - s->hit=1; - } - else if (i == -1) - goto err; - else /* i == 0 */ - { - if (!s->session_creation_enabled) - { - ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); - goto err; - } - if (!ssl_get_new_session(s,1)) - goto err; - } - } - - p+=j; - - if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) - { - /* cookie stuff */ - cookie_len = *(p++); - - /* - * The ClientHello may contain a cookie even if the - * HelloVerify message has not been sent--make sure that it - * does not cause an overflow. - */ - if ( cookie_len > sizeof(s->d1->rcvd_cookie)) - { - /* too much data */ - al = SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); - goto f_err; - } - - /* verify the cookie if appropriate option is set. */ - if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && - cookie_len > 0) - { - memcpy(s->d1->rcvd_cookie, p, cookie_len); - - if ( s->ctx->app_verify_cookie_cb != NULL) - { - if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, - cookie_len) == 0) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, - SSL_R_COOKIE_MISMATCH); - goto f_err; - } - /* else cookie verification succeeded */ - } - else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, - s->d1->cookie_len) != 0) /* default verification */ - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, - SSL_R_COOKIE_MISMATCH); - goto f_err; - } - - ret = 2; - } - - p += cookie_len; - } - - n2s(p,i); - if ((i == 0) && (j != 0)) - { - /* we need a cipher if we are not resuming a session */ - al=SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); - goto f_err; - } - if ((p+i) >= (d+n)) - { - /* not enough data */ - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); - goto f_err; - } - if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) - == NULL)) - { - goto err; - } - p+=i; - - /* If it is a hit, check that the cipher is in the list */ - if ((s->hit) && (i > 0)) - { - j=0; - id=s->session->cipher->id; - -#ifdef CIPHER_DEBUG - printf("client sent %d ciphers\n",sk_num(ciphers)); -#endif - for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) - { - c=sk_SSL_CIPHER_value(ciphers,i); -#ifdef CIPHER_DEBUG - printf("client [%2d of %2d]:%s\n", - i,sk_num(ciphers),SSL_CIPHER_get_name(c)); -#endif - if (c->id == id) - { - j=1; - break; - } - } -/* Disabled because it can be used in a ciphersuite downgrade - * attack: CVE-2010-4180. - */ -#if 0 - if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) - { - /* Special case as client bug workaround: the previously used cipher may - * not be in the current list, the client instead might be trying to - * continue using a cipher that before wasn't chosen due to server - * preferences. We'll have to reject the connection if the cipher is not - * enabled, though. */ - c = sk_SSL_CIPHER_value(ciphers, 0); - if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) - { - s->session->cipher = c; - j = 1; - } - } -#endif - if (j == 0) - { - /* we need to have the cipher in the cipher - * list if we are asked to reuse it */ - al=SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); - goto f_err; - } - } - - /* compression */ - i= *(p++); - if ((p+i) > (d+n)) - { - /* not enough data */ - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); - goto f_err; - } - q=p; - for (j=0; j<i; j++) - { - if (p[j] == 0) break; - } - - p+=i; - if (j >= i) - { - /* no compress */ - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); - goto f_err; - } - -#ifndef OPENSSL_NO_TLSEXT - /* TLS extensions*/ - if (s->version >= SSL3_VERSION) - { - if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) - { - /* 'al' set by ssl_parse_clienthello_tlsext */ - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); - goto f_err; - } - } - if (ssl_check_clienthello_tlsext(s) <= 0) { - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); - goto err; - } - - /* Check if we want to use external pre-shared secret for this - * handshake for not reused session only. We need to generate - * server_random before calling tls_session_secret_cb in order to allow - * SessionTicket processing to use it in key derivation. */ - { - unsigned long Time; - unsigned char *pos; - Time=(unsigned long)time(NULL); /* Time */ - pos=s->s3->server_random; - l2n(Time,pos); - if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0) - { - al=SSL_AD_INTERNAL_ERROR; - goto f_err; - } - } - - if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) - { - 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, - ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) - { - s->hit=1; - s->session->ciphers=ciphers; - s->session->verify_result=X509_V_OK; - - ciphers=NULL; - - /* check if some cipher was preferred by call back */ - pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); - if (pref_cipher == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); - goto f_err; - } - - s->session->cipher=pref_cipher; - - if (s->cipher_list) - sk_SSL_CIPHER_free(s->cipher_list); - - if (s->cipher_list_by_id) - sk_SSL_CIPHER_free(s->cipher_list_by_id); - - s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); - s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); - } - } -#endif - - /* Worst case, we will use the NULL compression, but if we have other - * options, we will now look for them. We have i-1 compression - * algorithms from the client, starting at q. */ - s->s3->tmp.new_compression=NULL; -#ifndef OPENSSL_NO_COMP - /* This only happens if we have a cache hit */ - if (s->session->compress_meth != 0) - { - int m, comp_id = s->session->compress_meth; - /* Perform sanity checks on resumed compression algorithm */ - /* Can't disable compression */ - if (s->options & SSL_OP_NO_COMPRESSION) - { - al=SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); - goto f_err; - } - /* Look for resumed compression method */ - for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) - { - comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); - if (comp_id == comp->id) - { - s->s3->tmp.new_compression=comp; - break; - } - } - if (s->s3->tmp.new_compression == NULL) - { - al=SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM); - goto f_err; - } - /* Look for resumed method in compression list */ - for (m = 0; m < i; m++) - { - if (q[m] == comp_id) - break; - } - if (m >= i) - { - al=SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING); - goto f_err; - } - } - else if (s->hit) - comp = NULL; - else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) - { /* See if we have a match */ - int m,nn,o,v,done=0; - - nn=sk_SSL_COMP_num(s->ctx->comp_methods); - for (m=0; m<nn; m++) - { - comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); - v=comp->id; - for (o=0; o<i; o++) - { - if (v == q[o]) - { - done=1; - break; - } - } - if (done) break; - } - if (done) - s->s3->tmp.new_compression=comp; - else - comp=NULL; - } -#else - /* If compression is disabled we'd better not try to resume a session - * using compression. - */ - if (s->session->compress_meth != 0) - { - al=SSL_AD_INTERNAL_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); - goto f_err; - } -#endif - - /* Given s->session->ciphers and SSL_get_ciphers, we must - * pick a cipher */ - - if (!s->hit) - { -#ifdef OPENSSL_NO_COMP - s->session->compress_meth=0; -#else - s->session->compress_meth=(comp == NULL)?0:comp->id; -#endif - if (s->session->ciphers != NULL) - sk_SSL_CIPHER_free(s->session->ciphers); - s->session->ciphers=ciphers; - if (ciphers == NULL) - { - al=SSL_AD_ILLEGAL_PARAMETER; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); - goto f_err; - } - ciphers=NULL; - c=ssl3_choose_cipher(s,s->session->ciphers, - SSL_get_ciphers(s)); - - if (c == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); - goto f_err; - } - s->s3->tmp.new_cipher=c; - } - else - { - /* Session-id reuse */ -#ifdef REUSE_CIPHER_BUG - STACK_OF(SSL_CIPHER) *sk; - SSL_CIPHER *nc=NULL; - SSL_CIPHER *ec=NULL; - - if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) - { - sk=s->session->ciphers; - for (i=0; i<sk_SSL_CIPHER_num(sk); i++) - { - c=sk_SSL_CIPHER_value(sk,i); - if (c->algorithm_enc & SSL_eNULL) - nc=c; - if (SSL_C_IS_EXPORT(c)) - ec=c; - } - if (nc != NULL) - s->s3->tmp.new_cipher=nc; - else if (ec != NULL) - s->s3->tmp.new_cipher=ec; - else - s->s3->tmp.new_cipher=s->session->cipher; - } - else -#endif - s->s3->tmp.new_cipher=s->session->cipher; - } - - if (!ssl3_digest_cached_records(s)) - goto f_err; - - /* we now have the following setup. - * client_random - * cipher_list - our prefered list of ciphers - * ciphers - the clients prefered list of ciphers - * compression - basically ignored right now - * ssl version is set - sslv3 - * s->session - The ssl session has been setup. - * s->hit - session reuse flag - * s->tmp.new_cipher - the new cipher to use. - */ - - if (ret < 0) ret=1; - if (0) - { -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); - } -err: - if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); - return(ret); - } - -int ssl3_send_server_hello(SSL *s) - { - unsigned char *buf; - unsigned char *p,*d; - int i,sl; - unsigned long l; -#ifdef OPENSSL_NO_TLSEXT - unsigned long Time; -#endif - - if (s->state == SSL3_ST_SW_SRVR_HELLO_A) - { - buf=(unsigned char *)s->init_buf->data; -#ifdef OPENSSL_NO_TLSEXT - p=s->s3->server_random; - /* Generate server_random if it was not needed previously */ - Time=(unsigned long)time(NULL); /* Time */ - l2n(Time,p); - if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) - return -1; -#endif - /* Do the message type and length last */ - d=p= &(buf[4]); - - *(p++)=s->version>>8; - *(p++)=s->version&0xff; - - /* Random stuff */ - memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); - p+=SSL3_RANDOM_SIZE; - - /* now in theory we have 3 options to sending back the - * session id. If it is a re-use, we send back the - * old session-id, if it is a new session, we send - * back the new session-id or we send back a 0 length - * session-id if we want it to be single use. - * Currently I will not implement the '0' length session-id - * 12-Jan-98 - I'll now support the '0' length stuff. - * - * We also have an additional case where stateless session - * resumption is successful: we always send back the old - * session id. In this case s->hit is non zero: this can - * only happen if stateless session resumption is succesful - * if session caching is disabled so existing functionality - * is unaffected. - */ - if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) - && !s->hit) - s->session->session_id_length=0; - - sl=s->session->session_id_length; - if (sl > (int)sizeof(s->session->session_id)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); - return -1; - } - *(p++)=sl; - memcpy(p,s->session->session_id,sl); - p+=sl; - - /* put the cipher */ - i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); - p+=i; - - /* put the compression method */ -#ifdef OPENSSL_NO_COMP - *(p++)=0; -#else - if (s->s3->tmp.new_compression == NULL) - *(p++)=0; - else - *(p++)=s->s3->tmp.new_compression->id; -#endif -#ifndef OPENSSL_NO_TLSEXT - if (ssl_prepare_serverhello_tlsext(s) <= 0) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); - return -1; - } - if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); - return -1; - } -#endif - /* do the header */ - l=(p-d); - d=buf; - *(d++)=SSL3_MT_SERVER_HELLO; - l2n3(l,d); - - s->state=SSL3_ST_SW_SRVR_HELLO_B; - /* number of bytes to write */ - s->init_num=p-buf; - s->init_off=0; - } - - /* SSL3_ST_SW_SRVR_HELLO_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int ssl3_send_server_done(SSL *s) - { - unsigned char *p; - - if (s->state == SSL3_ST_SW_SRVR_DONE_A) - { - p=(unsigned char *)s->init_buf->data; - - /* do the header */ - *(p++)=SSL3_MT_SERVER_DONE; - *(p++)=0; - *(p++)=0; - *(p++)=0; - - s->state=SSL3_ST_SW_SRVR_DONE_B; - /* number of bytes to write */ - s->init_num=4; - s->init_off=0; - } - - /* SSL3_ST_SW_SRVR_DONE_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int ssl3_send_server_key_exchange(SSL *s) - { -#ifndef OPENSSL_NO_RSA - unsigned char *q; - int j,num; - RSA *rsa; - unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; - unsigned int u; -#endif -#ifndef OPENSSL_NO_DH - DH *dh=NULL,*dhp; -#endif -#ifndef OPENSSL_NO_ECDH - EC_KEY *ecdh=NULL, *ecdhp; - unsigned char *encodedPoint = NULL; - int encodedlen = 0; - int curve_id = 0; - BN_CTX *bn_ctx = NULL; -#endif - EVP_PKEY *pkey; - unsigned char *p,*d; - int al,i; - unsigned long type; - int n; - CERT *cert; - BIGNUM *r[4]; - int nr[4],kn; - BUF_MEM *buf; - EVP_MD_CTX md_ctx; - - EVP_MD_CTX_init(&md_ctx); - if (s->state == SSL3_ST_SW_KEY_EXCH_A) - { - type=s->s3->tmp.new_cipher->algorithm_mkey; - cert=s->cert; - - buf=s->init_buf; - - r[0]=r[1]=r[2]=r[3]=NULL; - n=0; -#ifndef OPENSSL_NO_RSA - if (type & SSL_kRSA) - { - rsa=cert->rsa_tmp; - if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) - { - rsa=s->cert->rsa_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - if(rsa == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); - goto f_err; - } - RSA_up_ref(rsa); - cert->rsa_tmp=rsa; - } - if (rsa == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); - goto f_err; - } - r[0]=rsa->n; - r[1]=rsa->e; - s->s3->tmp.use_rsa_tmp=1; - } - else -#endif -#ifndef OPENSSL_NO_DH - if (type & SSL_kEDH) - { - dhp=cert->dh_tmp; - if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) - dhp=s->cert->dh_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - if (dhp == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); - goto f_err; - } - - if (s->s3->tmp.dh != NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto err; - } - - if ((dh=DHparams_dup(dhp)) == NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); - goto err; - } - - s->s3->tmp.dh=dh; - if ((dhp->pub_key == NULL || - dhp->priv_key == NULL || - (s->options & SSL_OP_SINGLE_DH_USE))) - { - if(!DH_generate_key(dh)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, - ERR_R_DH_LIB); - goto err; - } - } - else - { - dh->pub_key=BN_dup(dhp->pub_key); - dh->priv_key=BN_dup(dhp->priv_key); - if ((dh->pub_key == NULL) || - (dh->priv_key == NULL)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); - goto err; - } - } - r[0]=dh->p; - r[1]=dh->g; - r[2]=dh->pub_key; - } - else -#endif -#ifndef OPENSSL_NO_ECDH - if (type & SSL_kEECDH) - { - const EC_GROUP *group; - - ecdhp=cert->ecdh_tmp; - if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) - { - ecdhp=s->cert->ecdh_tmp_cb(s, - SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), - SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); - } - if (ecdhp == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); - goto f_err; - } - - if (s->s3->tmp.ecdh != NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); - goto err; - } - - /* Duplicate the ECDH structure. */ - if (ecdhp == NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - s->s3->tmp.ecdh=ecdh; - if ((EC_KEY_get0_public_key(ecdh) == NULL) || - (EC_KEY_get0_private_key(ecdh) == NULL) || - (s->options & SSL_OP_SINGLE_ECDH_USE)) - { - if(!EC_KEY_generate_key(ecdh)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - } - - if (((group = EC_KEY_get0_group(ecdh)) == NULL) || - (EC_KEY_get0_public_key(ecdh) == NULL) || - (EC_KEY_get0_private_key(ecdh) == NULL)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && - (EC_GROUP_get_degree(group) > 163)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); - goto err; - } - - /* XXX: For now, we only support ephemeral ECDH - * keys over named (not generic) curves. For - * supported named curves, curve_id is non-zero. - */ - if ((curve_id = - tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) - == 0) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); - goto err; - } - - /* Encode the public key. - * First check the size of encoding and - * allocate memory accordingly. - */ - encodedlen = EC_POINT_point2oct(group, - EC_KEY_get0_public_key(ecdh), - POINT_CONVERSION_UNCOMPRESSED, - NULL, 0, NULL); - - encodedPoint = (unsigned char *) - OPENSSL_malloc(encodedlen*sizeof(unsigned char)); - bn_ctx = BN_CTX_new(); - if ((encodedPoint == NULL) || (bn_ctx == NULL)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); - goto err; - } - - - encodedlen = EC_POINT_point2oct(group, - EC_KEY_get0_public_key(ecdh), - POINT_CONVERSION_UNCOMPRESSED, - encodedPoint, encodedlen, bn_ctx); - - if (encodedlen == 0) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); - goto err; - } - - BN_CTX_free(bn_ctx); bn_ctx=NULL; - - /* XXX: For now, we only support named (not - * generic) curves in ECDH ephemeral key exchanges. - * In this situation, we need four additional bytes - * to encode the entire ServerECDHParams - * structure. - */ - n = 4 + encodedlen; - - /* We'll generate the serverKeyExchange message - * explicitly so we can set these to NULLs - */ - r[0]=NULL; - r[1]=NULL; - r[2]=NULL; - r[3]=NULL; - } - else -#endif /* !OPENSSL_NO_ECDH */ -#ifndef OPENSSL_NO_PSK - if (type & SSL_kPSK) - { - /* reserve size for record length and PSK identity hint*/ - n+=2+strlen(s->ctx->psk_identity_hint); - } - else -#endif /* !OPENSSL_NO_PSK */ - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); - goto f_err; - } - for (i=0; r[i] != NULL; i++) - { - nr[i]=BN_num_bytes(r[i]); - n+=2+nr[i]; - } - - if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) - && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) - { - if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) - == NULL) - { - al=SSL_AD_DECODE_ERROR; - goto f_err; - } - kn=EVP_PKEY_size(pkey); - } - else - { - pkey=NULL; - kn=0; - } - - if (!BUF_MEM_grow_clean(buf,n+4+kn)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); - goto err; - } - d=(unsigned char *)s->init_buf->data; - p= &(d[4]); - - for (i=0; r[i] != NULL; i++) - { - s2n(nr[i],p); - BN_bn2bin(r[i],p); - p+=nr[i]; - } - -#ifndef OPENSSL_NO_ECDH - if (type & SSL_kEECDH) - { - /* XXX: For now, we only support named (not generic) curves. - * In this situation, the serverKeyExchange message has: - * [1 byte CurveType], [2 byte CurveName] - * [1 byte length of encoded point], followed by - * the actual encoded point itself - */ - *p = NAMED_CURVE_TYPE; - p += 1; - *p = 0; - p += 1; - *p = curve_id; - p += 1; - *p = encodedlen; - p += 1; - memcpy((unsigned char*)p, - (unsigned char *)encodedPoint, - encodedlen); - OPENSSL_free(encodedPoint); - encodedPoint = NULL; - p += encodedlen; - } -#endif - -#ifndef OPENSSL_NO_PSK - if (type & SSL_kPSK) - { - /* copy PSK identity hint */ - s2n(strlen(s->ctx->psk_identity_hint), p); - strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); - p+=strlen(s->ctx->psk_identity_hint); - } -#endif - - /* not anonymous */ - if (pkey != NULL) - { - /* n is the length of the params, they start at &(d[4]) - * and p points to the space at the end. */ -#ifndef OPENSSL_NO_RSA - if (pkey->type == EVP_PKEY_RSA) - { - q=md_buf; - j=0; - for (num=2; num > 0; num--) - { - EVP_DigestInit_ex(&md_ctx,(num == 2) - ?s->ctx->md5:s->ctx->sha1, NULL); - EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_DigestUpdate(&md_ctx,&(d[4]),n); - EVP_DigestFinal_ex(&md_ctx,q, - (unsigned int *)&i); - q+=i; - j+=i; - } - if (RSA_sign(NID_md5_sha1, md_buf, j, - &(p[2]), &u, pkey->pkey.rsa) <= 0) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); - goto err; - } - s2n(u,p); - n+=u+2; - } - else -#endif -#if !defined(OPENSSL_NO_DSA) - if (pkey->type == EVP_PKEY_DSA) - { - /* lets do DSS */ - EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); - EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(d[4]),n); - if (!EVP_SignFinal(&md_ctx,&(p[2]), - (unsigned int *)&i,pkey)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); - goto err; - } - s2n(i,p); - n+=i+2; - } - else -#endif -#if !defined(OPENSSL_NO_ECDSA) - if (pkey->type == EVP_PKEY_EC) - { - /* let's do ECDSA */ - EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); - EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); - EVP_SignUpdate(&md_ctx,&(d[4]),n); - if (!EVP_SignFinal(&md_ctx,&(p[2]), - (unsigned int *)&i,pkey)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); - goto err; - } - s2n(i,p); - n+=i+2; - } - else -#endif - { - /* Is this error check actually needed? */ - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); - goto f_err; - } - } - - *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; - l2n3(n,d); - - /* we should now have things packed up, so lets send - * it off */ - s->init_num=n+4; - s->init_off=0; - } - - s->state = SSL3_ST_SW_KEY_EXCH_B; - EVP_MD_CTX_cleanup(&md_ctx); - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); -err: -#ifndef OPENSSL_NO_ECDH - if (encodedPoint != NULL) OPENSSL_free(encodedPoint); - BN_CTX_free(bn_ctx); -#endif - EVP_MD_CTX_cleanup(&md_ctx); - return(-1); - } - -int ssl3_send_certificate_request(SSL *s) - { - unsigned char *p,*d; - int i,j,nl,off,n; - STACK_OF(X509_NAME) *sk=NULL; - X509_NAME *name; - BUF_MEM *buf; - - if (s->state == SSL3_ST_SW_CERT_REQ_A) - { - buf=s->init_buf; - - d=p=(unsigned char *)&(buf->data[4]); - - /* get the list of acceptable cert types */ - p++; - n=ssl3_get_req_cert_type(s,p); - d[0]=n; - p+=n; - n++; - - off=n; - p+=2; - n+=2; - - sk=SSL_get_client_CA_list(s); - nl=0; - if (sk != NULL) - { - for (i=0; i<sk_X509_NAME_num(sk); i++) - { - name=sk_X509_NAME_value(sk,i); - j=i2d_X509_NAME(name,NULL); - if (!BUF_MEM_grow_clean(buf,4+n+j+2)) - { - SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); - goto err; - } - p=(unsigned char *)&(buf->data[4+n]); - if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) - { - s2n(j,p); - i2d_X509_NAME(name,&p); - n+=2+j; - nl+=2+j; - } - else - { - d=p; - i2d_X509_NAME(name,&p); - j-=2; s2n(j,d); j+=2; - n+=j; - nl+=j; - } - } - } - /* else no CA names */ - p=(unsigned char *)&(buf->data[4+off]); - s2n(nl,p); - - d=(unsigned char *)buf->data; - *(d++)=SSL3_MT_CERTIFICATE_REQUEST; - l2n3(n,d); - - /* we should now have things packed up, so lets send - * it off */ - - s->init_num=n+4; - s->init_off=0; -#ifdef NETSCAPE_HANG_BUG - p=(unsigned char *)s->init_buf->data + s->init_num; - - /* do the header */ - *(p++)=SSL3_MT_SERVER_DONE; - *(p++)=0; - *(p++)=0; - *(p++)=0; - s->init_num += 4; -#endif - - s->state = SSL3_ST_SW_CERT_REQ_B; - } - - /* SSL3_ST_SW_CERT_REQ_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); -err: - return(-1); - } - -int ssl3_get_client_key_exchange(SSL *s) - { - int i,al,ok; - long n; - unsigned long alg_k; - unsigned char *p; -#ifndef OPENSSL_NO_RSA - RSA *rsa=NULL; - EVP_PKEY *pkey=NULL; -#endif -#ifndef OPENSSL_NO_DH - BIGNUM *pub=NULL; - DH *dh_srvr; -#endif -#ifndef OPENSSL_NO_KRB5 - KSSL_ERR kssl_err; -#endif /* OPENSSL_NO_KRB5 */ - -#ifndef OPENSSL_NO_ECDH - EC_KEY *srvr_ecdh = NULL; - EVP_PKEY *clnt_pub_pkey = NULL; - EC_POINT *clnt_ecpoint = NULL; - BN_CTX *bn_ctx = NULL; -#endif - - n=s->method->ssl_get_message(s, - SSL3_ST_SR_KEY_EXCH_A, - SSL3_ST_SR_KEY_EXCH_B, - SSL3_MT_CLIENT_KEY_EXCHANGE, - 2048, /* ??? */ - &ok); - - if (!ok) return((int)n); - p=(unsigned char *)s->init_msg; - - alg_k=s->s3->tmp.new_cipher->algorithm_mkey; - -#ifndef OPENSSL_NO_RSA - if (alg_k & SSL_kRSA) - { - /* FIX THIS UP EAY EAY EAY EAY */ - if (s->s3->tmp.use_rsa_tmp) - { - if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) - rsa=s->cert->rsa_tmp; - /* Don't do a callback because rsa_tmp should - * be sent already */ - if (rsa == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); - goto f_err; - - } - } - else - { - pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; - if ( (pkey == NULL) || - (pkey->type != EVP_PKEY_RSA) || - (pkey->pkey.rsa == NULL)) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); - goto f_err; - } - rsa=pkey->pkey.rsa; - } - - /* TLS and [incidentally] DTLS{0xFEFF} */ - if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER) - { - n2s(p,i); - if (n != i+2) - { - if (!(s->options & SSL_OP_TLS_D5_BUG)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); - goto err; - } - else - p-=2; - } - else - n=i; - } - - i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); - - al = -1; - - if (i != SSL_MAX_MASTER_KEY_LENGTH) - { - al=SSL_AD_DECODE_ERROR; - /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ - } - - if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) - { - /* The premaster secret must contain the same version number as the - * ClientHello to detect version rollback attacks (strangely, the - * protocol does not offer such protection for DH ciphersuites). - * However, buggy clients exist that send the negotiated protocol - * version instead if the server does not support the requested - * protocol version. - * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ - if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && - (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) - { - al=SSL_AD_DECODE_ERROR; - /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ - - /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack - * (http://eprint.iacr.org/2003/052/) exploits the version - * number check as a "bad version oracle" -- an alert would - * reveal that the plaintext corresponding to some ciphertext - * made up by the adversary is properly formatted except - * that the version number is wrong. To avoid such attacks, - * we should treat this just like any other decryption error. */ - } - } - - if (al != -1) - { - /* Some decryption failure -- use random value instead as countermeasure - * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding - * (see RFC 2246, section 7.4.7.1). */ - ERR_clear_error(); - i = SSL_MAX_MASTER_KEY_LENGTH; - p[0] = s->client_version >> 8; - p[1] = s->client_version & 0xff; - if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ - goto err; - } - - s->session->master_key_length= - s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key, - p,i); - OPENSSL_cleanse(p,i); - } - else -#endif -#ifndef OPENSSL_NO_DH - if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) - { - n2s(p,i); - if (n != i+2) - { - if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); - goto err; - } - else - { - p-=2; - i=(int)n; - } - } - - if (n == 0L) /* the parameters are in the cert */ - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); - goto f_err; - } - else - { - if (s->s3->tmp.dh == NULL) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); - goto f_err; - } - else - dh_srvr=s->s3->tmp.dh; - } - - pub=BN_bin2bn(p,i,NULL); - if (pub == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); - goto err; - } - - i=DH_compute_key(p,pub,dh_srvr); - - if (i <= 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); - goto err; - } - - DH_free(s->s3->tmp.dh); - s->s3->tmp.dh=NULL; - - BN_clear_free(pub); - pub=NULL; - s->session->master_key_length= - s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key,p,i); - OPENSSL_cleanse(p,i); - } - else -#endif -#ifndef OPENSSL_NO_KRB5 - if (alg_k & SSL_kKRB5) - { - krb5_error_code krb5rc; - krb5_data enc_ticket; - krb5_data authenticator; - krb5_data enc_pms; - KSSL_CTX *kssl_ctx = s->kssl_ctx; - EVP_CIPHER_CTX ciph_ctx; - const EVP_CIPHER *enc = NULL; - unsigned char iv[EVP_MAX_IV_LENGTH]; - unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH - + EVP_MAX_BLOCK_LENGTH]; - int padl, outl; - krb5_timestamp authtime = 0; - krb5_ticket_times ttimes; - - EVP_CIPHER_CTX_init(&ciph_ctx); - - if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); - - n2s(p,i); - enc_ticket.length = i; - - if (n < (long)(enc_ticket.length + 6)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - enc_ticket.data = (char *)p; - p+=enc_ticket.length; - - n2s(p,i); - authenticator.length = i; - - if (n < (long)(enc_ticket.length + authenticator.length + 6)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - authenticator.data = (char *)p; - p+=authenticator.length; - - n2s(p,i); - enc_pms.length = i; - enc_pms.data = (char *)p; - p+=enc_pms.length; - - /* Note that the length is checked again below, - ** after decryption - */ - if(enc_pms.length > sizeof pms) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - if (n != (long)(enc_ticket.length + authenticator.length + - enc_pms.length + 6)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - - if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, - &kssl_err)) != 0) - { -#ifdef KSSL_DEBUG - printf("kssl_sget_tkt rtn %d [%d]\n", - krb5rc, kssl_err.reason); - if (kssl_err.text) - printf("kssl_err text= %s\n", kssl_err.text); -#endif /* KSSL_DEBUG */ - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - kssl_err.reason); - goto err; - } - - /* Note: no authenticator is not considered an error, - ** but will return authtime == 0. - */ - if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, - &authtime, &kssl_err)) != 0) - { -#ifdef KSSL_DEBUG - printf("kssl_check_authent rtn %d [%d]\n", - krb5rc, kssl_err.reason); - if (kssl_err.text) - printf("kssl_err text= %s\n", kssl_err.text); -#endif /* KSSL_DEBUG */ - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - kssl_err.reason); - goto err; - } - - if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); - goto err; - } - -#ifdef KSSL_DEBUG - kssl_ctx_show(kssl_ctx); -#endif /* KSSL_DEBUG */ - - enc = kssl_map_enc(kssl_ctx->enctype); - if (enc == NULL) - goto err; - - memset(iv, 0, sizeof iv); /* per RFC 1510 */ - - if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DECRYPTION_FAILED); - goto err; - } - if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, - (unsigned char *)enc_pms.data, enc_pms.length)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DECRYPTION_FAILED); - goto err; - } - if (outl > SSL_MAX_MASTER_KEY_LENGTH) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DECRYPTION_FAILED); - goto err; - } - outl += padl; - if (outl > SSL_MAX_MASTER_KEY_LENGTH) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto err; - } - if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff)))) - { - /* The premaster secret must contain the same version number as the - * ClientHello to detect version rollback attacks (strangely, the - * protocol does not offer such protection for DH ciphersuites). - * However, buggy clients exist that send random bytes instead of - * the protocol version. - * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. - * (Perhaps we should have a separate BUG value for the Kerberos cipher) - */ - if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_AD_DECODE_ERROR); - goto err; - } - } - - EVP_CIPHER_CTX_cleanup(&ciph_ctx); - - s->session->master_key_length= - s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key, pms, outl); - - if (kssl_ctx->client_princ) - { - size_t len = strlen(kssl_ctx->client_princ); - if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) - { - s->session->krb5_client_princ_len = len; - memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); - } - } - - - /* Was doing kssl_ctx_free() here, - ** but it caused problems for apache. - ** kssl_ctx = kssl_ctx_free(kssl_ctx); - ** if (s->kssl_ctx) s->kssl_ctx = NULL; - */ - } - else -#endif /* OPENSSL_NO_KRB5 */ - -#ifndef OPENSSL_NO_ECDH - if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) - { - int ret = 1; - int field_size = 0; - const EC_KEY *tkey; - const EC_GROUP *group; - const BIGNUM *priv_key; - - /* initialize structures for server's ECDH key pair */ - if ((srvr_ecdh = EC_KEY_new()) == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } - - /* Let's get server private key and group information */ - if (alg_k & (SSL_kECDHr|SSL_kECDHe)) - { - /* use the certificate */ - tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; - } - else - { - /* use the ephermeral values we saved when - * generating the ServerKeyExchange msg. - */ - tkey = s->s3->tmp.ecdh; - } - - group = EC_KEY_get0_group(tkey); - priv_key = EC_KEY_get0_private_key(tkey); - - if (!EC_KEY_set_group(srvr_ecdh, group) || - !EC_KEY_set_private_key(srvr_ecdh, priv_key)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_EC_LIB); - goto err; - } - - /* Let's get client's public key */ - if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } - - if (n == 0L) - { - /* Client Publickey was in Client Certificate */ - - if (alg_k & SSL_kEECDH) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); - goto f_err; - } - if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) - == NULL) || - (clnt_pub_pkey->type != EVP_PKEY_EC)) - { - /* XXX: For now, we do not support client - * authentication using ECDH certificates - * so this branch (n == 0L) of the code is - * never executed. When that support is - * added, we ought to ensure the key - * received in the certificate is - * authorized for key agreement. - * ECDH_compute_key implicitly checks that - * the two ECDH shares are for the same - * group. - */ - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); - goto f_err; - } - - if (EC_POINT_copy(clnt_ecpoint, - EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_EC_LIB); - goto err; - } - ret = 2; /* Skip certificate verify processing */ - } - else - { - /* Get client's public key from encoded point - * in the ClientKeyExchange message. - */ - if ((bn_ctx = BN_CTX_new()) == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto err; - } - - /* Get encoded point length */ - i = *p; - p += 1; - if (n != 1 + i) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_EC_LIB); - goto err; - } - if (EC_POINT_oct2point(group, - clnt_ecpoint, p, i, bn_ctx) == 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_EC_LIB); - goto err; - } - /* p is pointing to somewhere in the buffer - * currently, so set it to the start - */ - p=(unsigned char *)s->init_buf->data; - } - - /* Compute the shared pre-master secret */ - field_size = EC_GROUP_get_degree(group); - if (field_size <= 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_ECDH_LIB); - goto err; - } - i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); - if (i <= 0) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_ECDH_LIB); - goto err; - } - - EVP_PKEY_free(clnt_pub_pkey); - EC_POINT_free(clnt_ecpoint); - EC_KEY_free(srvr_ecdh); - BN_CTX_free(bn_ctx); - EC_KEY_free(s->s3->tmp.ecdh); - s->s3->tmp.ecdh = NULL; - - /* Compute the master secret */ - s->session->master_key_length = s->method->ssl3_enc-> \ - generate_master_secret(s, s->session->master_key, p, i); - - OPENSSL_cleanse(p, i); - return (ret); - } - else -#endif -#ifndef OPENSSL_NO_PSK - if (alg_k & SSL_kPSK) - { - unsigned char *t = NULL; - unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; - unsigned int pre_ms_len = 0, psk_len = 0; - int psk_err = 1; - char tmp_id[PSK_MAX_IDENTITY_LEN+1]; - - al=SSL_AD_HANDSHAKE_FAILURE; - - n2s(p,i); - if (n != i+2) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_LENGTH_MISMATCH); - goto psk_err; - } - if (i > PSK_MAX_IDENTITY_LEN) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_DATA_LENGTH_TOO_LONG); - goto psk_err; - } - if (s->psk_server_callback == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_PSK_NO_SERVER_CB); - goto psk_err; - } - - /* Create guaranteed NULL-terminated identity - * string for the callback */ - memcpy(tmp_id, p, i); - memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); - psk_len = s->psk_server_callback(s, tmp_id, - psk_or_pre_ms, sizeof(psk_or_pre_ms)); - OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); - - if (psk_len > PSK_MAX_PSK_LEN) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_INTERNAL_ERROR); - goto psk_err; - } - else if (psk_len == 0) - { - /* PSK related to the given identity not found */ - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_PSK_IDENTITY_NOT_FOUND); - al=SSL_AD_UNKNOWN_PSK_IDENTITY; - goto psk_err; - } - - /* create PSK pre_master_secret */ - pre_ms_len=2+psk_len+2+psk_len; - t = psk_or_pre_ms; - memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); - s2n(psk_len, t); - memset(t, 0, psk_len); - t+=psk_len; - s2n(psk_len, t); - - if (s->session->psk_identity != NULL) - OPENSSL_free(s->session->psk_identity); - s->session->psk_identity = BUF_strdup((char *)p); - if (s->session->psk_identity == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto psk_err; - } - - if (s->session->psk_identity_hint != NULL) - OPENSSL_free(s->session->psk_identity_hint); - s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); - if (s->ctx->psk_identity_hint != NULL && - s->session->psk_identity_hint == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - ERR_R_MALLOC_FAILURE); - goto psk_err; - } - - s->session->master_key_length= - s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key, psk_or_pre_ms, pre_ms_len); - psk_err = 0; - psk_err: - OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); - if (psk_err != 0) - goto f_err; - } - else -#endif - if (alg_k & SSL_kGOST) - { - int ret = 0; - EVP_PKEY_CTX *pkey_ctx; - EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; - unsigned char premaster_secret[32], *start; - size_t outlen=32, inlen; - unsigned long alg_a; - - /* Get our certificate private key*/ - alg_a = s->s3->tmp.new_cipher->algorithm_auth; - if (alg_a & SSL_aGOST94) - pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey; - else if (alg_a & SSL_aGOST01) - pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; - - pkey_ctx = EVP_PKEY_CTX_new(pk,NULL); - EVP_PKEY_decrypt_init(pkey_ctx); - /* If client certificate is present and is of the same type, maybe - * use it for key exchange. Don't mind errors from - * EVP_PKEY_derive_set_peer, because it is completely valid to use - * a client certificate for authorization only. */ - client_pub_pkey = X509_get_pubkey(s->session->peer); - if (client_pub_pkey) - { - if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) - ERR_clear_error(); - } - /* Decrypt session key */ - if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED))) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); - goto gerr; - } - if (p[1] == 0x81) - { - start = p+3; - inlen = p[2]; - } - else if (p[1] < 0x80) - { - start = p+2; - inlen = p[1]; - } - else - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); - goto gerr; - } - if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0) - - { - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); - goto gerr; - } - /* Generate master secret */ - s->session->master_key_length= - s->method->ssl3_enc->generate_master_secret(s, - s->session->master_key,premaster_secret,32); - /* 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) - ret = 2; - else - ret = 1; - gerr: - EVP_PKEY_free(client_pub_pkey); - EVP_PKEY_CTX_free(pkey_ctx); - if (ret) - return ret; - else - goto err; - } - else - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, - SSL_R_UNKNOWN_CIPHER_TYPE); - goto f_err; - } - - return(1); -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); -#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) -err: -#endif -#ifndef OPENSSL_NO_ECDH - EVP_PKEY_free(clnt_pub_pkey); - EC_POINT_free(clnt_ecpoint); - if (srvr_ecdh != NULL) - EC_KEY_free(srvr_ecdh); - BN_CTX_free(bn_ctx); -#endif - return(-1); - } - -int ssl3_get_cert_verify(SSL *s) - { - EVP_PKEY *pkey=NULL; - unsigned char *p; - int al,ok,ret=0; - long n; - int type=0,i,j; - X509 *peer; - - n=s->method->ssl_get_message(s, - SSL3_ST_SR_CERT_VRFY_A, - SSL3_ST_SR_CERT_VRFY_B, - -1, - 514, /* 514? */ - &ok); - - if (!ok) return((int)n); - - if (s->session->peer != NULL) - { - peer=s->session->peer; - pkey=X509_get_pubkey(peer); - type=X509_certificate_type(peer,pkey); - } - else - { - peer=NULL; - pkey=NULL; - } - - if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) - { - s->s3->tmp.reuse_message=1; - if ((peer != NULL) && (type | EVP_PKT_SIGN)) - { - al=SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); - goto f_err; - } - ret=1; - goto end; - } - - if (peer == NULL) - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); - al=SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } - - if (!(type & EVP_PKT_SIGN)) - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); - al=SSL_AD_ILLEGAL_PARAMETER; - goto f_err; - } - - if (s->s3->change_cipher_spec) - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); - al=SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } - - /* we now have a signature that we need to verify */ - p=(unsigned char *)s->init_msg; - /* Check for broken implementations of GOST ciphersuites */ - /* If key is GOST and n is exactly 64, it is bare - * signature without length field */ - if (n==64 && (pkey->type==NID_id_GostR3410_94 || - pkey->type == NID_id_GostR3410_2001) ) - { - i=64; - } - else - { - n2s(p,i); - n-=2; - if (i > n) - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); - al=SSL_AD_DECODE_ERROR; - goto f_err; - } - } - j=EVP_PKEY_size(pkey); - if ((i > j) || (n > j) || (n <= 0)) - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); - al=SSL_AD_DECODE_ERROR; - goto f_err; - } - -#ifndef OPENSSL_NO_RSA - if (pkey->type == EVP_PKEY_RSA) - { - i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, - MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, - pkey->pkey.rsa); - if (i < 0) - { - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); - goto f_err; - } - if (i == 0) - { - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); - goto f_err; - } - } - else -#endif -#ifndef OPENSSL_NO_DSA - if (pkey->type == EVP_PKEY_DSA) - { - j=DSA_verify(pkey->save_type, - &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), - SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); - if (j <= 0) - { - /* bad signature */ - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); - goto f_err; - } - } - else -#endif -#ifndef OPENSSL_NO_ECDSA - if (pkey->type == EVP_PKEY_EC) - { - j=ECDSA_verify(pkey->save_type, - &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), - SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); - if (j <= 0) - { - /* bad signature */ - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, - SSL_R_BAD_ECDSA_SIGNATURE); - goto f_err; - } - } - else -#endif - if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) - { unsigned char signature[64]; - int idx; - EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); - EVP_PKEY_verify_init(pctx); - if (i!=64) { - fprintf(stderr,"GOST signature length is %d",i); - } - for (idx=0;idx<64;idx++) { - signature[63-idx]=p[idx]; - } - j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); - EVP_PKEY_CTX_free(pctx); - if (j<=0) - { - al=SSL_AD_DECRYPT_ERROR; - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, - SSL_R_BAD_ECDSA_SIGNATURE); - goto f_err; - } - } - else - { - SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); - al=SSL_AD_UNSUPPORTED_CERTIFICATE; - goto f_err; - } - - - ret=1; - if (0) - { -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); - } -end: - EVP_PKEY_free(pkey); - return(ret); - } - -int ssl3_get_client_certificate(SSL *s) - { - int i,ok,al,ret= -1; - X509 *x=NULL; - unsigned long l,nc,llen,n; - const unsigned char *p,*q; - unsigned char *d; - STACK_OF(X509) *sk=NULL; - - n=s->method->ssl_get_message(s, - SSL3_ST_SR_CERT_A, - SSL3_ST_SR_CERT_B, - -1, - s->max_cert_list, - &ok); - - if (!ok) return((int)n); - - if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) - { - if ( (s->verify_mode & SSL_VERIFY_PEER) && - (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); - al=SSL_AD_HANDSHAKE_FAILURE; - goto f_err; - } - /* If tls asked for a client cert, the client must return a 0 list */ - if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); - al=SSL_AD_UNEXPECTED_MESSAGE; - goto f_err; - } - s->s3->tmp.reuse_message=1; - return(1); - } - - if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) - { - al=SSL_AD_UNEXPECTED_MESSAGE; - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); - goto f_err; - } - p=d=(unsigned char *)s->init_msg; - - if ((sk=sk_X509_new_null()) == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); - goto err; - } - - n2l3(p,llen); - if (llen+3 != n) - { - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); - goto f_err; - } - for (nc=0; nc<llen; ) - { - n2l3(p,l); - if ((l+nc+3) > llen) - { - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); - goto f_err; - } - - q=p; - x=d2i_X509(NULL,&p,l); - if (x == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); - goto err; - } - if (p != (q+l)) - { - al=SSL_AD_DECODE_ERROR; - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); - goto f_err; - } - if (!sk_X509_push(sk,x)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); - goto err; - } - x=NULL; - nc+=l+3; - } - - if (sk_X509_num(sk) <= 0) - { - /* TLS does not mind 0 certs returned */ - if (s->version == SSL3_VERSION) - { - al=SSL_AD_HANDSHAKE_FAILURE; - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); - goto f_err; - } - /* Fail for TLS only if we required a certificate */ - else if ((s->verify_mode & SSL_VERIFY_PEER) && - (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); - al=SSL_AD_HANDSHAKE_FAILURE; - goto f_err; - } - } - else - { - i=ssl_verify_cert_chain(s,sk); - if (i <= 0) - { - al=ssl_verify_alarm_type(s->verify_result); - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); - goto f_err; - } - } - - if (s->session->peer != NULL) /* This should not be needed */ - X509_free(s->session->peer); - s->session->peer=sk_X509_shift(sk); - s->session->verify_result = s->verify_result; - - /* With the current implementation, sess_cert will always be NULL - * when we arrive here. */ - if (s->session->sess_cert == NULL) - { - s->session->sess_cert = ssl_sess_cert_new(); - if (s->session->sess_cert == NULL) - { - SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); - goto err; - } - } - if (s->session->sess_cert->cert_chain != NULL) - sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); - s->session->sess_cert->cert_chain=sk; - /* Inconsistency alert: cert_chain does *not* include the - * peer's own certificate, while we do include it in s3_clnt.c */ - - sk=NULL; - - ret=1; - if (0) - { -f_err: - ssl3_send_alert(s,SSL3_AL_FATAL,al); - } -err: - if (x != NULL) X509_free(x); - if (sk != NULL) sk_X509_pop_free(sk,X509_free); - return(ret); - } - -int ssl3_send_server_certificate(SSL *s) - { - unsigned long l; - X509 *x; - - if (s->state == SSL3_ST_SW_CERT_A) - { - x=ssl_get_server_send_cert(s); - if (x == NULL) - { - /* VRS: allow null cert if auth == KRB5 */ - if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || - (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) - { - SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); - return(0); - } - } - - l=ssl3_output_cert_chain(s,x); - s->state=SSL3_ST_SW_CERT_B; - s->init_num=(int)l; - s->init_off=0; - } - - /* SSL3_ST_SW_CERT_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } -#ifndef OPENSSL_NO_TLSEXT -int ssl3_send_newsession_ticket(SSL *s) - { - if (s->state == SSL3_ST_SW_SESSION_TICKET_A) - { - unsigned char *p, *senc, *macstart; - int len, slen; - unsigned int hlen; - EVP_CIPHER_CTX ctx; - HMAC_CTX hctx; - SSL_CTX *tctx = s->initial_ctx; - unsigned char iv[EVP_MAX_IV_LENGTH]; - unsigned char key_name[16]; - - /* get session encoding length */ - slen = i2d_SSL_SESSION(s->session, NULL); - /* Some length values are 16 bits, so forget it if session is - * too long - */ - if (slen > 0xFF00) - return -1; - /* Grow buffer if need be: the length calculation is as - * follows 1 (size of message name) + 3 (message length - * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + - * 16 (key name) + max_iv_len (iv length) + - * session_length + max_enc_block_size (max encrypted session - * length) + max_md_size (HMAC). - */ - if (!BUF_MEM_grow(s->init_buf, - 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + - EVP_MAX_MD_SIZE + slen)) - return -1; - senc = OPENSSL_malloc(slen); - if (!senc) - return -1; - p = senc; - i2d_SSL_SESSION(s->session, &p); - - p=(unsigned char *)s->init_buf->data; - /* do the header */ - *(p++)=SSL3_MT_NEWSESSION_TICKET; - /* Skip message length for now */ - p += 3; - EVP_CIPHER_CTX_init(&ctx); - HMAC_CTX_init(&hctx); - /* Initialize HMAC and cipher contexts. If callback present - * it does all the work otherwise use generated values - * from parent ctx. - */ - if (tctx->tlsext_ticket_key_cb) - { - if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, - &hctx, 1) < 0) - { - OPENSSL_free(senc); - return -1; - } - } - else - { - RAND_pseudo_bytes(iv, 16); - EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, - tctx->tlsext_tick_aes_key, iv); - HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, - tlsext_tick_md(), NULL); - memcpy(key_name, tctx->tlsext_tick_key_name, 16); - } - l2n(s->session->tlsext_tick_lifetime_hint, p); - /* Skip ticket length for now */ - p += 2; - /* Output key name */ - macstart = p; - memcpy(p, key_name, 16); - p += 16; - /* output IV */ - memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); - p += EVP_CIPHER_CTX_iv_length(&ctx); - /* Encrypt session data */ - EVP_EncryptUpdate(&ctx, p, &len, senc, slen); - p += len; - EVP_EncryptFinal(&ctx, p, &len); - p += len; - EVP_CIPHER_CTX_cleanup(&ctx); - - HMAC_Update(&hctx, macstart, p - macstart); - HMAC_Final(&hctx, p, &hlen); - HMAC_CTX_cleanup(&hctx); - - p += hlen; - /* Now write out lengths: p points to end of data written */ - /* Total length */ - len = p - (unsigned char *)s->init_buf->data; - p=(unsigned char *)s->init_buf->data + 1; - l2n3(len - 4, p); /* Message length */ - p += 4; - s2n(len - 10, p); /* Ticket length */ - - /* number of bytes to write */ - s->init_num= len; - s->state=SSL3_ST_SW_SESSION_TICKET_B; - s->init_off=0; - OPENSSL_free(senc); - } - - /* SSL3_ST_SW_SESSION_TICKET_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -int ssl3_send_cert_status(SSL *s) - { - if (s->state == SSL3_ST_SW_CERT_STATUS_A) - { - unsigned char *p; - /* Grow buffer if need be: the length calculation is as - * follows 1 (message type) + 3 (message length) + - * 1 (ocsp response type) + 3 (ocsp response length) - * + (ocsp response) - */ - if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) - return -1; - - p=(unsigned char *)s->init_buf->data; - - /* do the header */ - *(p++)=SSL3_MT_CERTIFICATE_STATUS; - /* message length */ - l2n3(s->tlsext_ocsp_resplen + 4, p); - /* status type */ - *(p++)= s->tlsext_status_type; - /* length of OCSP response */ - l2n3(s->tlsext_ocsp_resplen, p); - /* actual response */ - memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); - /* number of bytes to write */ - s->init_num = 8 + s->tlsext_ocsp_resplen; - s->state=SSL3_ST_SW_CERT_STATUS_B; - s->init_off = 0; - } - - /* SSL3_ST_SW_CERT_STATUS_B */ - return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); - } - -# ifndef OPENSSL_NO_NPN -/* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It - * sets the next_proto member in s if found */ -int ssl3_get_next_proto(SSL *s) - { - int ok; - unsigned proto_len, padding_len; - long n; - const unsigned char *p; - - /* Clients cannot send a NextProtocol message if we didn't see the - * extension in their ClientHello */ - if (!s->s3->next_proto_neg_seen) - { - SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION); - return -1; - } - - n=s->method->ssl_get_message(s, - SSL3_ST_SR_NEXT_PROTO_A, - SSL3_ST_SR_NEXT_PROTO_B, - SSL3_MT_NEXT_PROTO, - 514, /* See the payload format below */ - &ok); - - if (!ok) - return((int)n); - - /* s->state doesn't reflect whether ChangeCipherSpec has been received - * in this handshake, but s->s3->change_cipher_spec does (will be reset - * by ssl3_get_finished). */ - if (!s->s3->change_cipher_spec) - { - SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS); - return -1; - } - - if (n < 2) - return 0; /* The body must be > 1 bytes long */ - - p=(unsigned char *)s->init_msg; - - /* The payload looks like: - * uint8 proto_len; - * uint8 proto[proto_len]; - * uint8 padding_len; - * uint8 padding[padding_len]; - */ - proto_len = p[0]; - if (proto_len + 2 > s->init_num) - return 0; - padding_len = p[proto_len + 1]; - if (proto_len + padding_len + 2 != s->init_num) - return 0; - - s->next_proto_negotiated = OPENSSL_malloc(proto_len); - if (!s->next_proto_negotiated) - { - SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE); - return 0; - } - memcpy(s->next_proto_negotiated, p + 1, proto_len); - s->next_proto_negotiated_len = proto_len; - - return 1; - } -# endif -#endif |