/* ssl/s3_clnt.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2003 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. * */ #include #include "ssl_locl.h" #include "kssl_lcl.h" #include #include #include #include #include #ifdef OPENSSL_FIPS # include #endif #ifndef OPENSSL_NO_DH # include #endif #include #ifndef OPENSSL_NO_ENGINE # include #endif static SSL_METHOD *ssl3_get_client_method(int ver); static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); #ifndef OPENSSL_NO_ECDH static int curve_id2nid(int curve_id); int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs); #endif static SSL_METHOD *ssl3_get_client_method(int ver) { if (ver == SSL3_VERSION) return (SSLv3_client_method()); else return (NULL); } IMPLEMENT_ssl3_meth_func(SSLv3_client_method, ssl_undefined_function, ssl3_connect, ssl3_get_client_method) int ssl3_connect(SSL *s) { BUF_MEM *buf = NULL; unsigned long 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; s->in_handshake++; if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); for (;;) { state = s->state; switch (s->state) { case SSL_ST_RENEGOTIATE: s->new_session = 1; s->state = SSL_ST_CONNECT; s->ctx->stats.sess_connect_renegotiate++; /* break */ case SSL_ST_BEFORE: case SSL_ST_CONNECT: case SSL_ST_BEFORE | SSL_ST_CONNECT: case SSL_ST_OK | SSL_ST_CONNECT: s->server = 0; if (cb != NULL) cb(s, SSL_CB_HANDSHAKE_START, 1); if ((s->version & 0xff00) != 0x0300) { SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); ret = -1; goto end; } /* s->version=SSL3_VERSION; */ s->type = SSL_ST_CONNECT; 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; buf = NULL; } if (!ssl3_setup_buffers(s)) { ret = -1; goto end; } /* setup buffing BIO */ if (!ssl_init_wbio_buffer(s, 0)) { ret = -1; goto end; } /* don't push the buffering BIO quite yet */ ssl3_init_finished_mac(s); s->state = SSL3_ST_CW_CLNT_HELLO_A; s->ctx->stats.sess_connect++; s->init_num = 0; break; case SSL3_ST_CW_CLNT_HELLO_A: case SSL3_ST_CW_CLNT_HELLO_B: s->shutdown = 0; ret = ssl3_client_hello(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_SRVR_HELLO_A; s->init_num = 0; /* turn on buffering for the next lot of output */ if (s->bbio != s->wbio) s->wbio = BIO_push(s->bbio, s->wbio); break; case SSL3_ST_CR_SRVR_HELLO_A: case SSL3_ST_CR_SRVR_HELLO_B: ret = ssl3_get_server_hello(s); if (ret <= 0) goto end; if (s->hit) { s->state = SSL3_ST_CR_FINISHED_A; #ifndef OPENSSL_NO_TLSEXT if (s->tlsext_ticket_expected) { /* receive renewed session ticket */ s->state = SSL3_ST_CR_SESSION_TICKET_A; } #endif } else s->state = SSL3_ST_CR_CERT_A; s->init_num = 0; break; case SSL3_ST_CR_CERT_A: case SSL3_ST_CR_CERT_B: #ifndef OPENSSL_NO_TLSEXT ret = ssl3_check_finished(s); if (ret <= 0) goto end; if (ret == 2) { s->hit = 1; if (s->tlsext_ticket_expected) s->state = SSL3_ST_CR_SESSION_TICKET_A; else s->state = SSL3_ST_CR_FINISHED_A; s->init_num = 0; break; } #endif /* Check if it is anon DH/ECDH */ if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) { ret = ssl3_get_server_certificate(s); if (ret <= 0) goto end; #ifndef OPENSSL_NO_TLSEXT if (s->tlsext_status_expected) s->state = SSL3_ST_CR_CERT_STATUS_A; else s->state = SSL3_ST_CR_KEY_EXCH_A; } else { skip = 1; s->state = SSL3_ST_CR_KEY_EXCH_A; } #else } else skip = 1; s->state = SSL3_ST_CR_KEY_EXCH_A; #endif s->init_num = 0; break; case SSL3_ST_CR_KEY_EXCH_A: case SSL3_ST_CR_KEY_EXCH_B: ret = ssl3_get_key_exchange(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_CERT_REQ_A; s->init_num = 0; /* * at this point we check that we have the required stuff from * the server */ if (!ssl3_check_cert_and_algorithm(s)) { ret = -1; goto end; } break; case SSL3_ST_CR_CERT_REQ_A: case SSL3_ST_CR_CERT_REQ_B: ret = ssl3_get_certificate_request(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_SRVR_DONE_A; s->init_num = 0; break; case SSL3_ST_CR_SRVR_DONE_A: case SSL3_ST_CR_SRVR_DONE_B: ret = ssl3_get_server_done(s); if (ret <= 0) goto end; if (s->s3->tmp.cert_req) s->state = SSL3_ST_CW_CERT_A; else s->state = SSL3_ST_CW_KEY_EXCH_A; s->init_num = 0; break; case SSL3_ST_CW_CERT_A: case SSL3_ST_CW_CERT_B: case SSL3_ST_CW_CERT_C: case SSL3_ST_CW_CERT_D: ret = ssl3_send_client_certificate(s); if (ret <= 0) goto end; s->state = SSL3_ST_CW_KEY_EXCH_A; s->init_num = 0; break; case SSL3_ST_CW_KEY_EXCH_A: case SSL3_ST_CW_KEY_EXCH_B: ret = ssl3_send_client_key_exchange(s); if (ret <= 0) goto end; /* * EAY EAY EAY need to check for DH fix cert sent back */ /* * For TLS, cert_req is set to 2, so a cert chain of nothing is * sent, but no verify packet is sent */ /* * XXX: For now, we do not support client authentication in ECDH * cipher suites with ECDH (rather than ECDSA) certificates. We * need to skip the certificate verify message when client's * ECDH public key is sent inside the client certificate. */ if (s->s3->tmp.cert_req == 1) { s->state = SSL3_ST_CW_CERT_VRFY_A; } else { s->state = SSL3_ST_CW_CHANGE_A; s->s3->change_cipher_spec = 0; } s->init_num = 0; break; case SSL3_ST_CW_CERT_VRFY_A: case SSL3_ST_CW_CERT_VRFY_B: ret = ssl3_send_client_verify(s); if (ret <= 0) goto end; s->state = SSL3_ST_CW_CHANGE_A; s->init_num = 0; s->s3->change_cipher_spec = 0; break; case SSL3_ST_CW_CHANGE_A: case SSL3_ST_CW_CHANGE_B: ret = ssl3_send_change_cipher_spec(s, SSL3_ST_CW_CHANGE_A, SSL3_ST_CW_CHANGE_B); if (ret <= 0) goto end; s->state = SSL3_ST_CW_FINISHED_A; s->init_num = 0; s->session->cipher = s->s3->tmp.new_cipher; #ifdef OPENSSL_NO_COMP s->session->compress_meth = 0; #else if (s->s3->tmp.new_compression == NULL) s->session->compress_meth = 0; else s->session->compress_meth = s->s3->tmp.new_compression->id; #endif if (!s->method->ssl3_enc->setup_key_block(s)) { ret = -1; goto end; } if (!s->method->ssl3_enc->change_cipher_state(s, SSL3_CHANGE_CIPHER_CLIENT_WRITE)) { ret = -1; goto end; } break; case SSL3_ST_CW_FINISHED_A: case SSL3_ST_CW_FINISHED_B: ret = ssl3_send_finished(s, SSL3_ST_CW_FINISHED_A, SSL3_ST_CW_FINISHED_B, s->method-> ssl3_enc->client_finished_label, s->method-> ssl3_enc->client_finished_label_len); if (ret <= 0) goto end; s->s3->flags |= SSL3_FLAGS_CCS_OK; s->state = SSL3_ST_CW_FLUSH; /* clear flags */ s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; if (s->hit) { s->s3->tmp.next_state = SSL_ST_OK; if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { s->state = SSL_ST_OK; s->s3->flags |= SSL3_FLAGS_POP_BUFFER; s->s3->delay_buf_pop_ret = 0; } } else { #ifndef OPENSSL_NO_TLSEXT /* * Allow NewSessionTicket if ticket expected */ if (s->tlsext_ticket_expected) s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; else #endif s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; } s->init_num = 0; break; #ifndef OPENSSL_NO_TLSEXT case SSL3_ST_CR_SESSION_TICKET_A: case SSL3_ST_CR_SESSION_TICKET_B: ret = ssl3_get_new_session_ticket(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_FINISHED_A; s->init_num = 0; break; case SSL3_ST_CR_CERT_STATUS_A: case SSL3_ST_CR_CERT_STATUS_B: ret = ssl3_get_cert_status(s); if (ret <= 0) goto end; s->state = SSL3_ST_CR_KEY_EXCH_A; s->init_num = 0; break; #endif case SSL3_ST_CR_FINISHED_A: case SSL3_ST_CR_FINISHED_B: s->s3->flags |= SSL3_FLAGS_CCS_OK; ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, SSL3_ST_CR_FINISHED_B); if (ret <= 0) goto end; if (s->hit) s->state = SSL3_ST_CW_CHANGE_A; else s->state = SSL_ST_OK; s->init_num = 0; break; case SSL3_ST_CW_FLUSH: 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 SSL_ST_OK: /* clean a few things up */ ssl3_cleanup_key_block(s); if (s->init_buf != NULL) { BUF_MEM_free(s->init_buf); s->init_buf = NULL; } /* * If we are not 'joining' the last two packets, remove the * buffering now */ if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) ssl_free_wbio_buffer(s); /* else do it later in ssl3_write */ s->init_num = 0; s->new_session = 0; ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); if (s->hit) s->ctx->stats.sess_hit++; ret = 1; /* s->server=0; */ s->handshake_func = ssl3_connect; s->ctx->stats.sess_connect_good++; if (cb != NULL) cb(s, SSL_CB_HANDSHAKE_DONE, 1); goto end; /* break; */ default: SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); ret = -1; goto end; /* break; */ } /* did we do anything */ 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_CONNECT_LOOP, 1); s->state = new_state; } } skip = 0; } end: s->in_handshake--; if (buf != NULL) BUF_MEM_free(buf); if (cb != NULL) cb(s, SSL_CB_CONNECT_EXIT, ret); return (ret); } int ssl3_client_hello(SSL *s) { unsigned char *buf; unsigned char *p, *d; int i; unsigned long Time, l; #ifndef OPENSSL_NO_COMP int j; SSL_COMP *comp; #endif buf = (unsigned char *)s->init_buf->data; if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { SSL_SESSION *sess = s->session; if ((sess == NULL) || (sess->ssl_version != s->version) || #ifdef OPENSSL_NO_TLSEXT !sess->session_id_length || #else (!sess->session_id_length && !sess->tlsext_tick) || #endif (sess->not_resumable)) { if (!ssl_get_new_session(s, 0)) goto err; } /* else use the pre-loaded session */ p = s->s3->client_random; Time = (unsigned long)time(NULL); /* Time */ l2n(Time, p); if (RAND_pseudo_bytes(p, SSL3_RANDOM_SIZE - 4) <= 0) goto err; /* Do the message type and length last */ d = p = &(buf[4]); *(p++) = s->version >> 8; *(p++) = s->version & 0xff; s->client_version = s->version; /* Random stuff */ memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); p += SSL3_RANDOM_SIZE; /* Session ID */ if (s->new_session) i = 0; else i = s->session->session_id_length; *(p++) = i; if (i != 0) { if (i > (int)sizeof(s->session->session_id)) { SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); goto err; } memcpy(p, s->session->session_id, i); p += i; } /* Ciphers supported */ i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); if (i == 0) { SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); goto err; } s2n(i, p); p += i; /* COMPRESSION */ #ifdef OPENSSL_NO_COMP *(p++) = 1; #else if (s->ctx->comp_methods == NULL) j = 0; else j = sk_SSL_COMP_num(s->ctx->comp_methods); *(p++) = 1 + j; for (i = 0; i < j; i++) { comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); *(p++) = comp->id; } #endif *(p++) = 0; /* Add the NULL method */ #ifndef OPENSSL_NO_TLSEXT if ((p = ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) { SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); goto err; } #endif l = (p - d); d = buf; *(d++) = SSL3_MT_CLIENT_HELLO; l2n3(l, d); s->state = SSL3_ST_CW_CLNT_HELLO_B; /* number of bytes to write */ s->init_num = p - buf; s->init_off = 0; } /* SSL3_ST_CW_CLNT_HELLO_B */ return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); err: return (-1); } int ssl3_get_server_hello(SSL *s) { STACK_OF(SSL_CIPHER) *sk; SSL_CIPHER *c; unsigned char *p, *d; int i, al, ok; unsigned int j; long n; #ifndef OPENSSL_NO_COMP SSL_COMP *comp; #endif n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_HELLO_A, SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); if (!ok) return ((int)n); if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) { if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { if (s->d1->send_cookie == 0) { s->s3->tmp.reuse_message = 1; return 1; } else { /* already sent a cookie */ al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); goto f_err; } } } if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); goto f_err; } d = p = (unsigned char *)s->init_msg; if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); s->version = (s->version & 0xff00) | p[1]; al = SSL_AD_PROTOCOL_VERSION; goto f_err; } p += 2; /* load the server hello data */ /* load the server random */ memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); p += SSL3_RANDOM_SIZE; /* get the session-id */ j = *(p++); if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); goto f_err; } if (j != 0 && j == s->session->session_id_length && memcmp(p, s->session->session_id, j) == 0) { if (s->sid_ctx_length != s->session->sid_ctx_length || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { /* actually a client application bug */ al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); goto f_err; } s->s3->flags |= SSL3_FLAGS_CCS_OK; s->hit = 1; } else { /* a miss or crap from the other end */ /* * If we were trying for session-id reuse, make a new SSL_SESSION so * we don't stuff up other people */ s->hit = 0; if (s->session->session_id_length > 0) { if (!ssl_get_new_session(s, 0)) { al = SSL_AD_INTERNAL_ERROR; goto f_err; } } s->session->session_id_length = j; memcpy(s->session->session_id, p, j); /* j could be 0 */ } p += j; c = ssl_get_cipher_by_char(s, p); if (c == NULL) { /* unknown cipher */ al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); goto f_err; } p += ssl_put_cipher_by_char(s, NULL, NULL); sk = ssl_get_ciphers_by_id(s); i = sk_SSL_CIPHER_find(sk, c); if (i < 0) { /* we did not say we would use this cipher */ al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); goto f_err; } /* * Depending on the session caching (internal/external), the cipher * and/or cipher_id values may not be set. Make sure that cipher_id is * set and use it for comparison. */ if (s->session->cipher) s->session->cipher_id = s->session->cipher->id; if (s->hit && (s->session->cipher_id != c->id)) { /* Workaround is now obsolete */ #if 0 if (!(s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) #endif { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); goto f_err; } } s->s3->tmp.new_cipher = c; /* lets get the compression algorithm */ /* COMPRESSION */ #ifdef OPENSSL_NO_COMP if (*(p++) != 0) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); goto f_err; } #else j = *(p++); if (j == 0) comp = NULL; else comp = ssl3_comp_find(s->ctx->comp_methods, j); if ((j != 0) && (comp == NULL)) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); goto f_err; } else { s->s3->tmp.new_compression = comp; } #endif #ifndef OPENSSL_NO_TLSEXT /* TLS extensions */ if (s->version >= SSL3_VERSION) { if (!ssl_parse_serverhello_tlsext(s, &p, d, n, &al)) { /* 'al' set by ssl_parse_serverhello_tlsext */ SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); goto f_err; } if (ssl_check_serverhello_tlsext(s) <= 0) { SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SERVERHELLO_TLSEXT); goto err; } } #endif if (p != (d + n)) { /* wrong packet length */ al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); goto f_err; } return (1); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); #ifndef OPENSSL_NO_TLSEXT err: #endif return (-1); } int ssl3_get_server_certificate(SSL *s) { int al, i, ok, ret = -1; unsigned long n, nc, llen, l; X509 *x = NULL; const unsigned char *q, *p; unsigned char *d; STACK_OF(X509) *sk = NULL; SESS_CERT *sc; EVP_PKEY *pkey = NULL; int need_cert = 1; /* VRS: 0=> will allow null cert if auth == * KRB5 */ n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_A, SSL3_ST_CR_CERT_B, -1, s->max_cert_list, &ok); if (!ok) return ((int)n); if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) { 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_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); goto f_err; } p = d = (unsigned char *)s->init_msg; if ((sk = sk_X509_new_null()) == NULL) { SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); goto err; } n2l3(p, llen); if (llen + 3 != n) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_SERVER_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_SERVER_CERTIFICATE, SSL_R_CERT_LENGTH_MISMATCH); goto f_err; } q = p; x = d2i_X509(NULL, &q, l); if (x == NULL) { al = SSL_AD_BAD_CERTIFICATE; SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); goto f_err; } if (q != (p + l)) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_CERT_LENGTH_MISMATCH); goto f_err; } if (!sk_X509_push(sk, x)) { SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); goto err; } x = NULL; nc += l + 3; p = q; } i = ssl_verify_cert_chain(s, sk); if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) #ifndef OPENSSL_NO_KRB5 && (s->s3->tmp. new_cipher->algorithms & (SSL_MKEY_MASK | SSL_AUTH_MASK)) != (SSL_aKRB5 | SSL_kKRB5) #endif /* OPENSSL_NO_KRB5 */ ) { al = ssl_verify_alarm_type(s->verify_result); SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_CERTIFICATE_VERIFY_FAILED); goto f_err; } ERR_clear_error(); /* but we keep s->verify_result */ sc = ssl_sess_cert_new(); if (sc == NULL) goto err; if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); s->session->sess_cert = sc; sc->cert_chain = sk; /* * Inconsistency alert: cert_chain does include the peer's certificate, * which we don't include in s3_srvr.c */ x = sk_X509_value(sk, 0); sk = NULL; /* * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end */ pkey = X509_get_pubkey(x); /* VRS: allow null cert if auth == KRB5 */ need_cert = ((s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK | SSL_AUTH_MASK)) == (SSL_aKRB5 | SSL_kKRB5)) ? 0 : 1; #ifdef KSSL_DEBUG printf("pkey,x = %p, %p\n", (void *)pkey, (void *)x); printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, s->s3->tmp.new_cipher->algorithms, need_cert); #endif /* KSSL_DEBUG */ if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { x = NULL; al = SSL3_AL_FATAL; SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); goto f_err; } i = ssl_cert_type(x, pkey); if (need_cert && i < 0) { x = NULL; al = SSL3_AL_FATAL; SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_UNKNOWN_CERTIFICATE_TYPE); goto f_err; } if (need_cert) { sc->peer_cert_type = i; CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); /* * Why would the following ever happen? We just created sc a couple * of lines ago. */ if (sc->peer_pkeys[i].x509 != NULL) X509_free(sc->peer_pkeys[i].x509); sc->peer_pkeys[i].x509 = x; sc->peer_key = &(sc->peer_pkeys[i]); if (s->session->peer != NULL) X509_free(s->session->peer); CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); s->session->peer = x; } else { sc->peer_cert_type = i; sc->peer_key = NULL; if (s->session->peer != NULL) X509_free(s->session->peer); s->session->peer = NULL; } s->session->verify_result = s->verify_result; x = NULL; ret = 1; if (0) { f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); } err: EVP_PKEY_free(pkey); X509_free(x); sk_X509_pop_free(sk, X509_free); return (ret); } int ssl3_get_key_exchange(SSL *s) { #ifndef OPENSSL_NO_RSA unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; #endif EVP_MD_CTX md_ctx; unsigned char *param, *p; int al, j, ok; long i, param_len, n, alg; EVP_PKEY *pkey = NULL; #ifndef OPENSSL_NO_RSA RSA *rsa = NULL; #endif #ifndef OPENSSL_NO_DH DH *dh = NULL; #endif #ifndef OPENSSL_NO_ECDH EC_KEY *ecdh = NULL; BN_CTX *bn_ctx = NULL; EC_POINT *srvr_ecpoint = NULL; int curve_nid = 0; int encoded_pt_len = 0; #endif /* * use same message size as in ssl3_get_certificate_request() as * ServerKeyExchange message may be skipped */ n = s->method->ssl_get_message(s, SSL3_ST_CR_KEY_EXCH_A, SSL3_ST_CR_KEY_EXCH_B, -1, s->max_cert_list, &ok); if (!ok) return ((int)n); alg = s->s3->tmp.new_cipher->algorithms; EVP_MD_CTX_init(&md_ctx); if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { /* * Can't skip server key exchange if this is an ephemeral * ciphersuite. */ if (alg & (SSL_kEDH | SSL_kECDHE)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); al = SSL_AD_UNEXPECTED_MESSAGE; goto f_err; } s->s3->tmp.reuse_message = 1; return (1); } param = p = (unsigned char *)s->init_msg; if (s->session->sess_cert != NULL) { #ifndef OPENSSL_NO_RSA if (s->session->sess_cert->peer_rsa_tmp != NULL) { RSA_free(s->session->sess_cert->peer_rsa_tmp); s->session->sess_cert->peer_rsa_tmp = NULL; } #endif #ifndef OPENSSL_NO_DH if (s->session->sess_cert->peer_dh_tmp) { DH_free(s->session->sess_cert->peer_dh_tmp); s->session->sess_cert->peer_dh_tmp = NULL; } #endif #ifndef OPENSSL_NO_ECDH if (s->session->sess_cert->peer_ecdh_tmp) { EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); s->session->sess_cert->peer_ecdh_tmp = NULL; } #endif } else { s->session->sess_cert = ssl_sess_cert_new(); } /* Total length of the parameters including the length prefix */ param_len = 0; al = SSL_AD_DECODE_ERROR; #ifndef OPENSSL_NO_RSA if (alg & SSL_kRSA) { /* Temporary RSA keys only allowed in export ciphersuites */ if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } if ((rsa = RSA_new()) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } param_len = 2; if (param_len > n) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } n2s(p, i); if (i > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); goto f_err; } param_len += i; if (!(rsa->n = BN_bin2bn(p, i, rsa->n))) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } p += i; if (2 > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } param_len += 2; n2s(p, i); if (i > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); goto f_err; } param_len += i; if (!(rsa->e = BN_bin2bn(p, i, rsa->e))) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } p += i; n -= param_len; /* this should be because we are using an export cipher */ if (alg & SSL_aRSA) pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); else { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } s->session->sess_cert->peer_rsa_tmp = rsa; rsa = NULL; } #else /* OPENSSL_NO_RSA */ if (0) ; #endif #ifndef OPENSSL_NO_DH else if (alg & SSL_kEDH) { if ((dh = DH_new()) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } param_len = 2; if (param_len > n) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } n2s(p, i); if (i > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); goto f_err; } param_len += i; if (!(dh->p = BN_bin2bn(p, i, NULL))) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } p += i; if (2 > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } param_len += 2; n2s(p, i); if (i > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); goto f_err; } param_len += i; if (!(dh->g = BN_bin2bn(p, i, NULL))) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } p += i; if (2 > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } param_len += 2; n2s(p, i); if (i > n - param_len) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); goto f_err; } param_len += i; if (!(dh->pub_key = BN_bin2bn(p, i, NULL))) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); goto err; } p += i; n -= param_len; # ifndef OPENSSL_NO_RSA if (alg & SSL_aRSA) pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); # else if (0) ; # endif # ifndef OPENSSL_NO_DSA else if (alg & SSL_aDSS) pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. x509); # endif /* else anonymous DH, so no certificate or pkey. */ s->session->sess_cert->peer_dh_tmp = dh; dh = NULL; } else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) { al = SSL_AD_ILLEGAL_PARAMETER; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); goto f_err; } #endif /* !OPENSSL_NO_DH */ #ifndef OPENSSL_NO_ECDH else if (alg & SSL_kECDHE) { EC_GROUP *ngroup; const EC_GROUP *group; if ((ecdh = EC_KEY_new()) == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } /* * Extract elliptic curve parameters and the server's ephemeral ECDH * public key. Keep accumulating lengths of various components in * param_len and make sure it never exceeds n. */ /* * XXX: For now we only support named (not generic) curves and the * ECParameters in this case is just three bytes. We also need one * byte for the length of the encoded point */ param_len = 4; if (param_len > n) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); goto f_err; } if ((*p != NAMED_CURVE_TYPE) || ((curve_nid = curve_id2nid(*(p + 2))) == 0)) { al = SSL_AD_INTERNAL_ERROR; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); goto f_err; } ngroup = EC_GROUP_new_by_curve_name(curve_nid); if (ngroup == NULL) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } if (EC_KEY_set_group(ecdh, ngroup) == 0) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } EC_GROUP_free(ngroup); group = EC_KEY_get0_group(ecdh); if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && (EC_GROUP_get_degree(group) > 163)) { al = SSL_AD_EXPORT_RESTRICTION; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); goto f_err; } p += 3; /* Next, get the encoded ECPoint */ if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || ((bn_ctx = BN_CTX_new()) == NULL)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } encoded_pt_len = *p; /* length of encoded point */ p += 1; if ((encoded_pt_len > n - param_len) || (EC_POINT_oct2point(group, srvr_ecpoint, p, encoded_pt_len, bn_ctx) == 0)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); goto f_err; } param_len += encoded_pt_len; n -= param_len; p += encoded_pt_len; /* * The ECC/TLS specification does not mention the use of DSA to sign * ECParameters in the server key exchange message. We do support RSA * and ECDSA. */ if (0) ; # ifndef OPENSSL_NO_RSA else if (alg & SSL_aRSA) pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); # endif # ifndef OPENSSL_NO_ECDSA else if (alg & SSL_aECDSA) pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); # endif /* else anonymous ECDH, so no certificate or pkey. */ EC_KEY_set_public_key(ecdh, srvr_ecpoint); s->session->sess_cert->peer_ecdh_tmp = ecdh; ecdh = NULL; BN_CTX_free(bn_ctx); bn_ctx = NULL; EC_POINT_free(srvr_ecpoint); srvr_ecpoint = NULL; } else if (alg & SSL_kECDH) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto f_err; } #endif /* !OPENSSL_NO_ECDH */ if (alg & SSL_aFZA) { al = SSL_AD_HANDSHAKE_FAILURE; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); goto f_err; } /* p points to the next byte, there are 'n' bytes left */ /* if it was signed, check the signature */ if (pkey != NULL) { n2s(p, i); n -= 2; j = EVP_PKEY_size(pkey); /* * Check signature length. If n is 0 then signature is empty */ if ((i != n) || (n > j) || (n <= 0)) { /* wrong packet length */ SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); goto f_err; } #ifndef OPENSSL_NO_RSA if (pkey->type == EVP_PKEY_RSA) { int num; unsigned int size; j = 0; q = md_buf; 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, param, param_len); EVP_DigestFinal_ex(&md_ctx, q, &size); q += size; j += size; } i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); if (i < 0) { al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); goto f_err; } if (i == 0) { /* bad signature */ al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); goto f_err; } } else #endif #ifndef OPENSSL_NO_DSA if (pkey->type == EVP_PKEY_DSA) { /* lets do DSS */ EVP_VerifyInit_ex(&md_ctx, EVP_dss1(), NULL); EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), SSL3_RANDOM_SIZE); EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE); EVP_VerifyUpdate(&md_ctx, param, param_len); if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { /* bad signature */ al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); goto f_err; } } else #endif #ifndef OPENSSL_NO_ECDSA if (pkey->type == EVP_PKEY_EC) { /* let's do ECDSA */ EVP_VerifyInit_ex(&md_ctx, EVP_ecdsa(), NULL); EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), SSL3_RANDOM_SIZE); EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), SSL3_RANDOM_SIZE); EVP_VerifyUpdate(&md_ctx, param, param_len); if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { /* bad signature */ al = SSL_AD_DECRYPT_ERROR; SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); goto f_err; } } else #endif { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } } else { /* still data left over */ if (!(alg & SSL_aNULL)) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } if (n != 0) { SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); goto f_err; } } EVP_PKEY_free(pkey); EVP_MD_CTX_cleanup(&md_ctx); return (1); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: EVP_PKEY_free(pkey); #ifndef OPENSSL_NO_RSA if (rsa != NULL) RSA_free(rsa); #endif #ifndef OPENSSL_NO_DH if (dh != NULL) DH_free(dh); #endif #ifndef OPENSSL_NO_ECDH BN_CTX_free(bn_ctx); EC_POINT_free(srvr_ecpoint); if (ecdh != NULL) EC_KEY_free(ecdh); #endif EVP_MD_CTX_cleanup(&md_ctx); return (-1); } int ssl3_get_certificate_request(SSL *s) { int ok, ret = 0; unsigned long n, nc, l; unsigned int llen, ctype_num, i; X509_NAME *xn = NULL; const unsigned char *p, *q; unsigned char *d; STACK_OF(X509_NAME) *ca_sk = NULL; n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_REQ_A, SSL3_ST_CR_CERT_REQ_B, -1, s->max_cert_list, &ok); if (!ok) return ((int)n); s->s3->tmp.cert_req = 0; if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { s->s3->tmp.reuse_message = 1; return (1); } if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); goto err; } /* TLS does not like anon-DH with client cert */ if (s->version > SSL3_VERSION) { l = s->s3->tmp.new_cipher->algorithms; if (l & SSL_aNULL) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); goto err; } } p = d = (unsigned char *)s->init_msg; if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } /* get the certificate types */ ctype_num = *(p++); if (ctype_num > SSL3_CT_NUMBER) ctype_num = SSL3_CT_NUMBER; for (i = 0; i < ctype_num; i++) s->s3->tmp.ctype[i] = p[i]; p += ctype_num; /* get the CA RDNs */ n2s(p, llen); #if 0 { FILE *out; out = fopen("/tmp/vsign.der", "w"); fwrite(p, 1, llen, out); fclose(out); } #endif if ((llen + ctype_num + 2 + 1) != n) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); goto err; } for (nc = 0; nc < llen;) { n2s(p, l); if ((l + nc + 2) > llen) { if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) goto cont; /* netscape bugs */ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); goto err; } q = p; if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { /* If netscape tolerance is on, ignore errors */ if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) goto cont; else { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); goto err; } } if (q != (p + l)) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_LENGTH_MISMATCH); goto err; } if (!sk_X509_NAME_push(ca_sk, xn)) { SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); goto err; } p += l; nc += l + 2; } if (0) { cont: ERR_clear_error(); } /* we should setup a certificate to return.... */ s->s3->tmp.cert_req = 1; s->s3->tmp.ctype_num = ctype_num; if (s->s3->tmp.ca_names != NULL) sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); s->s3->tmp.ca_names = ca_sk; ca_sk = NULL; ret = 1; err: if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); return (ret); } static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) { return (X509_NAME_cmp(*a, *b)); } #ifndef OPENSSL_NO_TLSEXT int ssl3_get_new_session_ticket(SSL *s) { int ok, al, ret = 0, ticklen; long n; const unsigned char *p; unsigned char *d; n = s->method->ssl_get_message(s, SSL3_ST_CR_SESSION_TICKET_A, SSL3_ST_CR_SESSION_TICKET_B, -1, 16384, &ok); if (!ok) return ((int)n); if (s->s3->tmp.message_type == SSL3_MT_FINISHED) { s->s3->tmp.reuse_message = 1; return (1); } if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) { al = SSL_AD_UNEXPECTED_MESSAGE; SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_BAD_MESSAGE_TYPE); goto f_err; } if (n < 6) { /* need at least ticket_lifetime_hint + ticket length */ al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); goto f_err; } p = d = (unsigned char *)s->init_msg; if (s->session->session_id_length > 0) { int i = s->session_ctx->session_cache_mode; SSL_SESSION *new_sess; /* * We reused an existing session, so we need to replace it with a new * one */ if (i & SSL_SESS_CACHE_CLIENT) { /* * Remove the old session from the cache */ if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { if (s->session_ctx->remove_session_cb != NULL) s->session_ctx->remove_session_cb(s->session_ctx, s->session); } else { /* We carry on if this fails */ SSL_CTX_remove_session(s->session_ctx, s->session); } } if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { al = SSL_AD_INTERNAL_ERROR; SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); goto f_err; } SSL_SESSION_free(s->session); s->session = new_sess; } n2l(p, s->session->tlsext_tick_lifetime_hint); n2s(p, ticklen); /* ticket_lifetime_hint + ticket_length + ticket */ if (ticklen + 6 != n) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); goto f_err; } if (s->session->tlsext_tick) { OPENSSL_free(s->session->tlsext_tick); s->session->tlsext_ticklen = 0; } s->session->tlsext_tick = OPENSSL_malloc(ticklen); if (!s->session->tlsext_tick) { SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); goto err; } memcpy(s->session->tlsext_tick, p, ticklen); s->session->tlsext_ticklen = ticklen; /* * There are two ways to detect a resumed ticket sesion. One is to set an * appropriate session ID and then the server must return a match in * ServerHello. This allows the normal client session ID matching to work * and we know much earlier that the ticket has been accepted. The * other way is to set zero length session ID when the ticket is * presented and rely on the handshake to determine session resumption. * We choose the former approach because this fits in with assumptions * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is * SHA256 is disabled) hash of the ticket. */ EVP_Digest(p, ticklen, s->session->session_id, &s->session->session_id_length, # ifndef OPENSSL_NO_SHA256 EVP_sha256(), NULL); # else EVP_sha1(), NULL); # endif ret = 1; return (ret); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); err: return (-1); } int ssl3_get_cert_status(SSL *s) { int ok, al; unsigned long resplen; long n; const unsigned char *p; n = s->method->ssl_get_message(s, SSL3_ST_CR_CERT_STATUS_A, SSL3_ST_CR_CERT_STATUS_B, SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); if (!ok) return ((int)n); if (n < 4) { /* need at least status type + length */ al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); goto f_err; } p = (unsigned char *)s->init_msg; if (*p++ != TLSEXT_STATUSTYPE_ocsp) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); goto f_err; } n2l3(p, resplen); if (resplen + 4 != (unsigned long)n) { al = SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); goto f_err; } if (s->tlsext_ocsp_resp) OPENSSL_free(s->tlsext_ocsp_resp); s->tlsext_ocsp_resp = BUF_memdup(p, resplen); if (!s->tlsext_ocsp_resp) { al = SSL_AD_INTERNAL_ERROR; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); goto f_err; } s->tlsext_ocsp_resplen = resplen; if (s->ctx->tlsext_status_cb) { int ret; ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); if (ret == 0) { al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); goto f_err; } if (ret < 0) { al = SSL_AD_INTERNAL_ERROR; SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); goto f_err; } } return 1; f_err: ssl3_send_alert(s, SSL3_AL_FATAL, al); return (-1); } #endif int ssl3_get_server_done(SSL *s) { int ok, ret = 0; long n; /* Second to last param should be very small, like 0 :-) */ n = s->method->ssl_get_message(s, SSL3_ST_CR_SRVR_DONE_A, SSL3_ST_CR_SRVR_DONE_B, SSL3_MT_SERVER_DONE, 30, &ok); if (!ok) return ((int)n); if (n > 0) { /* should contain no data */ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); return -1; } ret = 1; return (ret); } int ssl3_send_client_key_exchange(SSL *s) { unsigned char *p, *d; int n; unsigned long l; #ifndef OPENSSL_NO_RSA unsigned char *q; EVP_PKEY *pkey = NULL; #endif #ifndef OPENSSL_NO_KRB5 KSSL_ERR kssl_err; #endif /* OPENSSL_NO_KRB5 */ #ifndef OPENSSL_NO_ECDH EC_KEY *clnt_ecdh = NULL; const EC_POINT *srvr_ecpoint = NULL; EVP_PKEY *srvr_pub_pkey = NULL; unsigned char *encodedPoint = NULL; int encoded_pt_len = 0; BN_CTX *bn_ctx = NULL; #endif if (s->state == SSL3_ST_CW_KEY_EXCH_A) { d = (unsigned char *)s->init_buf->data; p = &(d[4]); l = s->s3->tmp.new_cipher->algorithms; /* Fool emacs indentation */ if (0) { } #ifndef OPENSSL_NO_RSA else if (l & SSL_kRSA) { RSA *rsa; unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; if (s->session->sess_cert == NULL) { /* * We should always have a server certificate with SSL_kRSA. */ SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } if (s->session->sess_cert->peer_rsa_tmp != NULL) rsa = s->session->sess_cert->peer_rsa_tmp; else { pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. x509); if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) || (pkey->pkey.rsa == NULL)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } rsa = pkey->pkey.rsa; EVP_PKEY_free(pkey); } tmp_buf[0] = s->client_version >> 8; tmp_buf[1] = s->client_version & 0xff; if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) goto err; s->session->master_key_length = sizeof tmp_buf; q = p; /* Fix buf for TLS and beyond */ if (s->version > SSL3_VERSION) p += 2; n = RSA_public_encrypt(sizeof tmp_buf, tmp_buf, p, rsa, RSA_PKCS1_PADDING); # ifdef PKCS1_CHECK if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0] = 0x70; # endif if (n <= 0) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, SSL_R_BAD_RSA_ENCRYPT); goto err; } /* Fix buf for TLS and beyond */ if (s->version > SSL3_VERSION) { s2n(n, q); n += 2; } s->session->master_key_length = s->method->ssl3_enc->generate_master_secret(s, s-> session->master_key, tmp_buf, sizeof tmp_buf); OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); } #endif #ifndef OPENSSL_NO_KRB5 else if (l & SSL_kKRB5) { krb5_error_code krb5rc; KSSL_CTX *kssl_ctx = s->kssl_ctx; /* krb5_data krb5_ap_req; */ krb5_data *enc_ticket; krb5_data authenticator, *authp = NULL; EVP_CIPHER_CTX ciph_ctx; EVP_CIPHER *enc = NULL; unsigned char iv[EVP_MAX_IV_LENGTH]; unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; int padl, outl = sizeof(epms); EVP_CIPHER_CTX_init(&ciph_ctx); # ifdef KSSL_DEBUG printf("ssl3_send_client_key_exchange(%lx & %lx)\n", l, SSL_kKRB5); # endif /* KSSL_DEBUG */ authp = NULL; # ifdef KRB5SENDAUTH if (KRB5SENDAUTH) authp = &authenticator; # endif /* KRB5SENDAUTH */ krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); enc = kssl_map_enc(kssl_ctx->enctype); if (enc == NULL) goto err; # ifdef KSSL_DEBUG { printf("kssl_cget_tkt rtn %d\n", krb5rc); if (krb5rc && kssl_err.text) printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); } # endif /* KSSL_DEBUG */ if (krb5rc) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); goto err; } /*- * 20010406 VRS - Earlier versions used KRB5 AP_REQ * in place of RFC 2712 KerberosWrapper, as in: * * Send ticket (copy to *p, set n = length) * n = krb5_ap_req.length; * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); * if (krb5_ap_req.data) * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); * * Now using real RFC 2712 KerberosWrapper * (Thanks to Simon Wilkinson ) * Note: 2712 "opaque" types are here replaced * with a 2-byte length followed by the value. * Example: * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms * Where "xx xx" = length bytes. Shown here with * optional authenticator omitted. */ /* KerberosWrapper.Ticket */ s2n(enc_ticket->length, p); memcpy(p, enc_ticket->data, enc_ticket->length); p += enc_ticket->length; n = enc_ticket->length + 2; /* KerberosWrapper.Authenticator */ if (authp && authp->length) { s2n(authp->length, p); memcpy(p, authp->data, authp->length); p += authp->length; n += authp->length + 2; free(authp->data); authp->data = NULL; authp->length = 0; } else { s2n(0, p); /* null authenticator length */ n += 2; } tmp_buf[0] = s->client_version >> 8; tmp_buf[1] = s->client_version & 0xff; if (RAND_bytes(&(tmp_buf[2]), sizeof tmp_buf - 2) <= 0) goto err; /*- * 20010420 VRS. Tried it this way; failed. * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, * kssl_ctx->length); * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); */ memset(iv, 0, sizeof iv); /* per RFC 1510 */ EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); EVP_EncryptUpdate(&ciph_ctx, epms, &outl, tmp_buf, sizeof tmp_buf); EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); outl += padl; if (outl > sizeof epms) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } EVP_CIPHER_CTX_cleanup(&ciph_ctx); /* KerberosWrapper.EncryptedPreMasterSecret */ s2n(outl, p); memcpy(p, epms, outl); p += outl; n += outl + 2; s->session->master_key_length = s->method->ssl3_enc->generate_master_secret(s, s-> session->master_key, tmp_buf, sizeof tmp_buf); OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); OPENSSL_cleanse(epms, outl); } #endif #ifndef OPENSSL_NO_DH else if (l & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { DH *dh_srvr, *dh_clnt; if (s->session->sess_cert == NULL) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto err; } if (s->session->sess_cert->peer_dh_tmp != NULL) dh_srvr = s->session->sess_cert->peer_dh_tmp; else { /* we get them from the cert */ ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); goto err; } /* generate a new random key */ if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } if (!DH_generate_key(dh_clnt)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } /* * use the 'p' output buffer for the DH key, but make sure to * clear it out afterwards */ n = DH_compute_key(p, dh_srvr->pub_key, dh_clnt); if (n <= 0) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); goto err; } /* generate master key from the result */ s->session->master_key_length = s->method->ssl3_enc->generate_master_secret(s, s-> session->master_key, p, n); /* clean up */ memset(p, 0, n); /* send off the data */ n = BN_num_bytes(dh_clnt->pub_key); s2n(n, p); BN_bn2bin(dh_clnt->pub_key, p); n += 2; DH_free(dh_clnt); /* perhaps clean things up a bit EAY EAY EAY EAY */ } #endif #ifndef OPENSSL_NO_ECDH else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) { const EC_GROUP *srvr_group = NULL; EC_KEY *tkey; int ecdh_clnt_cert = 0; int field_size = 0; if (s->session->sess_cert == NULL) { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); goto err; } /* * Did we send out the client's ECDH share for use in premaster * computation as part of client certificate? If so, set * ecdh_clnt_cert to 1. */ if ((l & SSL_kECDH) && (s->cert != NULL)) { /*- * XXX: For now, we do not support client * authentication using ECDH certificates. * To add such support, one needs to add * code that checks for appropriate * conditions and sets ecdh_clnt_cert to 1. * For example, the cert have an ECC * key on the same curve as the server's * and the key should be authorized for * key agreement. * * One also needs to add code in ssl3_connect * to skip sending the certificate verify * message. * * if ((s->cert->key->privatekey != NULL) && * (s->cert->key->privatekey->type == * EVP_PKEY_EC) && ...) * ecdh_clnt_cert = 1; */ } if (s->session->sess_cert->peer_ecdh_tmp != NULL) { tkey = s->session->sess_cert->peer_ecdh_tmp; } else { /* Get the Server Public Key from Cert */ srvr_pub_pkey = X509_get_pubkey(s->session-> sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); if ((srvr_pub_pkey == NULL) || (srvr_pub_pkey->type != EVP_PKEY_EC) || (srvr_pub_pkey->pkey.ec == NULL)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } tkey = srvr_pub_pkey->pkey.ec; } srvr_group = EC_KEY_get0_group(tkey); srvr_ecpoint = EC_KEY_get0_public_key(tkey); if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } if ((clnt_ecdh = EC_KEY_new()) == NULL) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } if (ecdh_clnt_cert) { /* * Reuse key info from our certificate We only need our * private key to perform the ECDH computation. */ const BIGNUM *priv_key; tkey = s->cert->key->privatekey->pkey.ec; priv_key = EC_KEY_get0_private_key(tkey); if (priv_key == NULL) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); goto err; } } else { /* Generate a new ECDH key pair */ if (!(EC_KEY_generate_key(clnt_ecdh))) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); goto err; } } /* * use the 'p' output buffer for the ECDH key, but make sure to * clear it out afterwards */ field_size = EC_GROUP_get_degree(srvr_group); if (field_size <= 0) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); goto err; } n = ECDH_compute_key(p, (field_size + 7) / 8, srvr_ecpoint, clnt_ecdh, NULL); if (n <= 0) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); goto err; } /* generate master key from the result */ s->session->master_key_length = s->method->ssl3_enc->generate_master_secret(s, s-> session->master_key, p, n); memset(p, 0, n); /* clean up */ if (ecdh_clnt_cert) { /* Send empty client key exch message */ n = 0; } else { /* * First check the size of encoding and allocate memory * accordingly. */ encoded_pt_len = EC_POINT_point2oct(srvr_group, EC_KEY_get0_public_key(clnt_ecdh), POINT_CONVERSION_UNCOMPRESSED, NULL, 0, NULL); encodedPoint = (unsigned char *) OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); bn_ctx = BN_CTX_new(); if ((encodedPoint == NULL) || (bn_ctx == NULL)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); goto err; } /* Encode the public key */ n = EC_POINT_point2oct(srvr_group, EC_KEY_get0_public_key(clnt_ecdh), POINT_CONVERSION_UNCOMPRESSED, encodedPoint, encoded_pt_len, bn_ctx); *p = n; /* length of encoded point */ /* Encoded point will be copied here */ p += 1; /* copy the point */ memcpy((unsigned char *)p, encodedPoint, n); /* increment n to account for length field */ n += 1; } /* Free allocated memory */ BN_CTX_free(bn_ctx); if (encodedPoint != NULL) OPENSSL_free(encodedPoint); if (clnt_ecdh != NULL) EC_KEY_free(clnt_ecdh); EVP_PKEY_free(srvr_pub_pkey); } #endif /* !OPENSSL_NO_ECDH */ else { ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); goto err; } *(d++) = SSL3_MT_CLIENT_KEY_EXCHANGE; l2n3(n, d); s->state = SSL3_ST_CW_KEY_EXCH_B; /* number of bytes to write */ s->init_num = n + 4; s->init_off = 0; } /* SSL3_ST_CW_KEY_EXCH_B */ return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); err: #ifndef OPENSSL_NO_ECDH BN_CTX_free(bn_ctx); if (encodedPoint != NULL) OPENSSL_free(encodedPoint); if (clnt_ecdh != NULL) EC_KEY_free(clnt_ecdh); EVP_PKEY_free(srvr_pub_pkey); #endif return (-1); } int ssl3_send_client_verify(SSL *s) { unsigned char *p, *d; unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; EVP_PKEY *pkey; #ifndef OPENSSL_NO_RSA unsigned u = 0; #endif unsigned long n; #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) int j; #endif if (s->state == SSL3_ST_CW_CERT_VRFY_A) { d = (unsigned char *)s->init_buf->data; p = &(d[4]); pkey = s->cert->key->privatekey; s->method->ssl3_enc->cert_verify_mac(s, &(s->s3->finish_dgst2), &(data[MD5_DIGEST_LENGTH])); #ifndef OPENSSL_NO_RSA if (pkey->type == EVP_PKEY_RSA) { s->method->ssl3_enc->cert_verify_mac(s, &(s->s3->finish_dgst1), &(data[0])); if (RSA_sign (NID_md5_sha1, data, MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, &(p[2]), &u, pkey->pkey.rsa) <= 0) { SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); goto err; } s2n(u, p); n = u + 2; } else #endif #ifndef OPENSSL_NO_DSA if (pkey->type == EVP_PKEY_DSA) { if (!DSA_sign(pkey->save_type, &(data[MD5_DIGEST_LENGTH]), SHA_DIGEST_LENGTH, &(p[2]), (unsigned int *)&j, pkey->pkey.dsa)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); goto err; } s2n(j, p); n = j + 2; } else #endif #ifndef OPENSSL_NO_ECDSA if (pkey->type == EVP_PKEY_EC) { if (!ECDSA_sign(pkey->save_type, &(data[MD5_DIGEST_LENGTH]), SHA_DIGEST_LENGTH, &(p[2]), (unsigned int *)&j, pkey->pkey.ec)) { SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); goto err; } s2n(j, p); n = j + 2; } else #endif { SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); goto err; } *(d++) = SSL3_MT_CERTIFICATE_VERIFY; l2n3(n, d); s->state = SSL3_ST_CW_CERT_VRFY_B; s->init_num = (int)n + 4; s->init_off = 0; } return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); err: return (-1); } int ssl3_send_client_certificate(SSL *s) { X509 *x509 = NULL; EVP_PKEY *pkey = NULL; int i; unsigned long l; if (s->state == SSL3_ST_CW_CERT_A) { if ((s->cert == NULL) || (s->cert->key->x509 == NULL) || (s->cert->key->privatekey == NULL)) s->state = SSL3_ST_CW_CERT_B; else s->state = SSL3_ST_CW_CERT_C; } /* We need to get a client cert */ if (s->state == SSL3_ST_CW_CERT_B) { /* * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; * return(-1); We then get retied later */ i = 0; i = ssl_do_client_cert_cb(s, &x509, &pkey); if (i < 0) { s->rwstate = SSL_X509_LOOKUP; return (-1); } s->rwstate = SSL_NOTHING; if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { s->state = SSL3_ST_CW_CERT_B; if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) i = 0; } else if (i == 1) { i = 0; SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); } if (x509 != NULL) X509_free(x509); if (pkey != NULL) EVP_PKEY_free(pkey); if (i == 0) { if (s->version == SSL3_VERSION) { s->s3->tmp.cert_req = 0; ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); return (1); } else { s->s3->tmp.cert_req = 2; } } /* Ok, we have a cert */ s->state = SSL3_ST_CW_CERT_C; } if (s->state == SSL3_ST_CW_CERT_C) { s->state = SSL3_ST_CW_CERT_D; l = ssl3_output_cert_chain(s, (s->s3->tmp.cert_req == 2) ? NULL : s->cert->key->x509); s->init_num = (int)l; s->init_off = 0; } /* SSL3_ST_CW_CERT_D */ return (ssl3_do_write(s, SSL3_RT_HANDSHAKE)); } #define has_bits(i,m) (((i)&(m)) == (m)) int ssl3_check_cert_and_algorithm(SSL *s) { int i, idx; long algs; EVP_PKEY *pkey = NULL; SESS_CERT *sc; #ifndef OPENSSL_NO_RSA RSA *rsa; #endif #ifndef OPENSSL_NO_DH DH *dh; #endif sc = s->session->sess_cert; algs = s->s3->tmp.new_cipher->algorithms; /* we don't have a certificate */ if (algs & (SSL_aDH | SSL_aNULL | SSL_aKRB5)) return (1); if (sc == NULL) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); goto err; } #ifndef OPENSSL_NO_RSA rsa = s->session->sess_cert->peer_rsa_tmp; #endif #ifndef OPENSSL_NO_DH dh = s->session->sess_cert->peer_dh_tmp; #endif /* This is the passed certificate */ idx = sc->peer_cert_type; #ifndef OPENSSL_NO_ECDH if (idx == SSL_PKEY_ECC) { if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s->s3->tmp.new_cipher) == 0) { /* check failed */ SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); goto f_err; } else { return 1; } } #endif pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); EVP_PKEY_free(pkey); /* Check that we have a certificate if we require one */ if ((algs & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_RSA_SIGNING_CERT); goto f_err; } #ifndef OPENSSL_NO_DSA else if ((algs & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DSA_SIGNING_CERT); goto f_err; } #endif #ifndef OPENSSL_NO_RSA if ((algs & SSL_kRSA) && !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_RSA_ENCRYPTING_CERT); goto f_err; } #endif #ifndef OPENSSL_NO_DH if ((algs & SSL_kEDH) && !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY); goto f_err; } else if ((algs & SSL_kDHr) && !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_RSA_CERT); goto f_err; } # ifndef OPENSSL_NO_DSA else if ((algs & SSL_kDHd) && !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_DSA_CERT); goto f_err; } # endif #endif if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) { #ifndef OPENSSL_NO_RSA if (algs & SSL_kRSA) { if (rsa == NULL || RSA_size(rsa) * 8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_EXPORT_TMP_RSA_KEY); goto f_err; } } else #endif #ifndef OPENSSL_NO_DH if (algs & (SSL_kEDH | SSL_kDHr | SSL_kDHd)) { if (dh == NULL || DH_size(dh) * 8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_EXPORT_TMP_DH_KEY); goto f_err; } } else #endif { SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); goto f_err; } } return (1); f_err: ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); err: return (0); } #ifndef OPENSSL_NO_ECDH /* This is the complement of nid2curve_id in s3_srvr.c. */ static int curve_id2nid(int curve_id) { /* * ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) (no changes * in draft-ietf-tls-ecc-03.txt [June 2003]) */ static int nid_list[26] = { 0, NID_sect163k1, /* sect163k1 (1) */ NID_sect163r1, /* sect163r1 (2) */ NID_sect163r2, /* sect163r2 (3) */ NID_sect193r1, /* sect193r1 (4) */ NID_sect193r2, /* sect193r2 (5) */ NID_sect233k1, /* sect233k1 (6) */ NID_sect233r1, /* sect233r1 (7) */ NID_sect239k1, /* sect239k1 (8) */ NID_sect283k1, /* sect283k1 (9) */ NID_sect283r1, /* sect283r1 (10) */ NID_sect409k1, /* sect409k1 (11) */ NID_sect409r1, /* sect409r1 (12) */ NID_sect571k1, /* sect571k1 (13) */ NID_sect571r1, /* sect571r1 (14) */ NID_secp160k1, /* secp160k1 (15) */ NID_secp160r1, /* secp160r1 (16) */ NID_secp160r2, /* secp160r2 (17) */ NID_secp192k1, /* secp192k1 (18) */ NID_X9_62_prime192v1, /* secp192r1 (19) */ NID_secp224k1, /* secp224k1 (20) */ NID_secp224r1, /* secp224r1 (21) */ NID_secp256k1, /* secp256k1 (22) */ NID_X9_62_prime256v1, /* secp256r1 (23) */ NID_secp384r1, /* secp384r1 (24) */ NID_secp521r1 /* secp521r1 (25) */ }; if ((curve_id < 1) || (curve_id > 25)) return 0; return nid_list[curve_id]; } #endif /* * Check to see if handshake is full or resumed. Usually this is just a case * of checking to see if a cache hit has occurred. In the case of session * tickets we have to check the next message to be sure. */ #ifndef OPENSSL_NO_TLSEXT int ssl3_check_finished(SSL *s) { int ok; long n; /* * If we have no ticket or session ID is non-zero length (a match of a * non-zero session length would never reach here) it cannot be a resumed * session. */ if (!s->session->tlsext_tick || s->session->session_id_length) return 1; /* * 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_CR_CERT_A, SSL3_ST_CR_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_FINISHED) || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) return 2; return 1; } #endif int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) { int i = 0; #ifndef OPENSSL_NO_ENGINE if (s->ctx->client_cert_engine) { i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, SSL_get_client_CA_list(s), px509, ppkey, NULL, NULL, NULL); if (i != 0) return i; } #endif if (s->ctx->client_cert_cb) i = s->ctx->client_cert_cb(s, px509, ppkey); return i; }