| /* ssl/s3_srvr.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) 1998-2005 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. |
| * |
| */ |
| |
| #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 SSL_METHOD *ssl3_get_server_method(int ver); |
| #ifndef OPENSSL_NO_ECDH |
| static int nid2curve_id(int nid); |
| #endif |
| |
| static 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 l,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 or KRB5 */ |
| if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL) |
| && !(s->s3->tmp.new_cipher->algorithms & 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: |
| l=s->s3->tmp.new_cipher->algorithms; |
| |
| /* clear this, it may get reset by |
| * send_server_key_exchange */ |
| if ((s->options & SSL_OP_EPHEMERAL_RSA) |
| #ifndef OPENSSL_NO_KRB5 |
| && !(l & SSL_KRB5) |
| #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 |
| * |
| * 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 |
| || (l & SSL_kECDHE) |
| || (l & (SSL_DH|SSL_kFZA)) |
| || ((l & 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->algorithms & 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->algorithms & SSL_aKRB5)) |
| { |
| /* 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. |
| */ |
| s->state=SSL3_ST_SR_FINISHED_A; |
| s->init_num = 0; |
| } |
| else |
| { |
| 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 |
| */ |
| s->method->ssl3_enc->cert_verify_mac(s, |
| &(s->s3->finish_dgst1), |
| &(s->s3->tmp.cert_verify_md[0])); |
| s->method->ssl3_enc->cert_verify_mac(s, |
| &(s->s3->finish_dgst2), |
| &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); |
| } |
| 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; |
| |
| s->state=SSL3_ST_SR_FINISHED_A; |
| s->init_num=0; |
| break; |
| |
| 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; |
| if (s->hit) |
| s->state=SSL_ST_OK; |
| #ifndef OPENSSL_NO_TLSEXT |
| else if (s->tlsext_ticket_expected) |
| s->state=SSL3_ST_SW_SESSION_TICKET_A; |
| #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) |
| s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
| 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.) |
| * I hope that tmp.dh is the only thing that may need to be cleared |
| * when a handshake is not completed ... */ |
| #ifndef OPENSSL_NO_DH |
| if (s->s3->tmp.dh != NULL) |
| { |
| DH_free(s->s3->tmp.dh); |
| s->s3->tmp.dh = 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 (!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 (!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; |
| } |
| } |
| 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; |
| } |
| } |
| 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; |
| } |
| #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 |
| if (s->ctx->comp_methods != NULL) |
| { /* 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; |
| } |
| #endif |
| |
| /* TLS does not mind if there is extra stuff */ |
| #if 0 /* SSL 3.0 does not mind either, so we should disable this test |
| * (was enabled in 0.9.6d through 0.9.6j and 0.9.7 through 0.9.7b, |
| * in earlier SSLeay/OpenSSL releases this test existed but was buggy) */ |
| if (s->version == SSL3_VERSION) |
| { |
| if (p < (d+n)) |
| { |
| /* wrong number of bytes, |
| * there could be more to follow */ |
| al=SSL_AD_DECODE_ERROR; |
| SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
| 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->algorithms & 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; |
| } |
| |
| /* 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,Time; |
| |
| if (s->state == SSL3_ST_SW_SRVR_HELLO_A) |
| { |
| buf=(unsigned char *)s->init_buf->data; |
| p=s->s3->server_random; |
| Time=(unsigned long)time(NULL); /* Time */ |
| l2n(Time,p); |
| if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
| return -1; |
| /* 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 ((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->algorithms & SSL_MKEY_MASK; |
| 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) |
| { |
| DH_free(dh); |
| 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_kECDHE) |
| { |
| 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) |
| { |
| EC_KEY_free(s->s3->tmp.ecdh); |
| 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 (!EC_KEY_up_ref(ecdhp)) |
| { |
| SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
| goto err; |
| } |
| ecdh = ecdhp; |
| |
| 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 = |
| 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 */ |
| { |
| 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->algorithms & SSL_aNULL)) |
| { |
| 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_kECDHE) |
| { |
| /* 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); |
| p += encodedlen; |
| } |
| #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_MD_CTX_set_flags(&md_ctx, |
| EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); |
| 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 l; |
| 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; |
| |
| l=s->s3->tmp.new_cipher->algorithms; |
| |
| #ifndef OPENSSL_NO_RSA |
| if (l & 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, including pre-0.9.8f */ |
| if (s->version > SSL3_VERSION && |
| s->client_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 (l & (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 (l & 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; |
| 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 < (int)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 < (int)(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 ((l & SSL_kECDH) || (l & 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 (l & SSL_kECDH) |
| { |
| /* 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 (l & SSL_kECDHE) |
| { |
| 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 (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); |
| if (srvr_ecdh != NULL) |
| EC_KEY_free(srvr_ecdh); |
| BN_CTX_free(bn_ctx); |
| |
| /* 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 |
| { |
| 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; |
| 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 |
| { |
| 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 */ |
| (s->s3->tmp.new_cipher->algorithms |
| & (SSL_MKEY_MASK|SSL_AUTH_MASK)) |
| != (SSL_aKRB5|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_ECDH |
| /* This is the complement of curve_id2nid in s3_clnt.c. */ |
| static int nid2curve_id(int nid) |
| { |
| /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) |
| * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ |
| switch (nid) { |
| case NID_sect163k1: /* sect163k1 (1) */ |
| return 1; |
| case NID_sect163r1: /* sect163r1 (2) */ |
| return 2; |
| case NID_sect163r2: /* sect163r2 (3) */ |
| return 3; |
| case NID_sect193r1: /* sect193r1 (4) */ |
| return 4; |
| case NID_sect193r2: /* sect193r2 (5) */ |
| return 5; |
| case NID_sect233k1: /* sect233k1 (6) */ |
| return 6; |
| case NID_sect233r1: /* sect233r1 (7) */ |
| return 7; |
| case NID_sect239k1: /* sect239k1 (8) */ |
| return 8; |
| case NID_sect283k1: /* sect283k1 (9) */ |
| return 9; |
| case NID_sect283r1: /* sect283r1 (10) */ |
| return 10; |
| case NID_sect409k1: /* sect409k1 (11) */ |
| return 11; |
| case NID_sect409r1: /* sect409r1 (12) */ |
| return 12; |
| case NID_sect571k1: /* sect571k1 (13) */ |
| return 13; |
| case NID_sect571r1: /* sect571r1 (14) */ |
| return 14; |
| case NID_secp160k1: /* secp160k1 (15) */ |
| return 15; |
| case NID_secp160r1: /* secp160r1 (16) */ |
| return 16; |
| case NID_secp160r2: /* secp160r2 (17) */ |
| return 17; |
| case NID_secp192k1: /* secp192k1 (18) */ |
| return 18; |
| case NID_X9_62_prime192v1: /* secp192r1 (19) */ |
| return 19; |
| case NID_secp224k1: /* secp224k1 (20) */ |
| return 20; |
| case NID_secp224r1: /* secp224r1 (21) */ |
| return 21; |
| case NID_secp256k1: /* secp256k1 (22) */ |
| return 22; |
| case NID_X9_62_prime256v1: /* secp256r1 (23) */ |
| return 23; |
| case NID_secp384r1: /* secp384r1 (24) */ |
| return 24; |
| case NID_secp521r1: /* secp521r1 (25) */ |
| return 25; |
| default: |
| return 0; |
| } |
| } |
| #endif |
| #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)); |
| } |
| #endif |