2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
113 #include "ssl_locl.h"
114 #include <openssl/buffer.h>
115 #include <openssl/rand.h>
116 #include <openssl/objects.h>
117 #include <openssl/evp.h>
119 /*static const SSL_METHOD *ssl23_get_client_method(int ver);*/
120 static int ssl23_client_hello(SSL *s);
121 static int ssl23_get_server_hello(SSL *s);
124 static const SSL_METHOD *ssl23_get_client_method(int ver)
126 #ifndef OPENSSL_NO_SSL3
127 if (ver == SSL3_VERSION)
128 return (SSLv3_client_method());
130 if (ver == TLS1_VERSION)
131 return (TLSv1_client_method());
132 else if (ver == TLS1_1_VERSION)
133 return (TLSv1_1_client_method());
134 else if (ver == TLS1_2_VERSION)
135 return (TLSv1_2_client_method());
141 int ssl23_connect(SSL *s)
144 unsigned long Time = (unsigned long)time(NULL);
145 void (*cb) (const SSL *ssl, int type, int val) = NULL;
147 int new_state, state;
149 RAND_add(&Time, sizeof(Time), 0);
153 if (s->info_callback != NULL)
154 cb = s->info_callback;
155 else if (s->ctx->info_callback != NULL)
156 cb = s->ctx->info_callback;
159 if (!SSL_in_init(s) || SSL_in_before(s)) {
170 case SSL_ST_BEFORE | SSL_ST_CONNECT:
171 case SSL_ST_OK | SSL_ST_CONNECT:
173 if (s->session != NULL) {
174 SSLerr(SSL_F_SSL23_CONNECT,
175 SSL_R_SSL23_DOING_SESSION_ID_REUSE);
181 cb(s, SSL_CB_HANDSHAKE_START, 1);
183 /* s->version=TLS1_VERSION; */
184 s->type = SSL_ST_CONNECT;
186 if (s->init_buf == NULL) {
187 if ((buf = BUF_MEM_new()) == NULL) {
191 if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) {
199 if (!ssl3_setup_buffers(s)) {
204 ssl3_init_finished_mac(s);
206 s->state = SSL23_ST_CW_CLNT_HELLO_A;
207 s->ctx->stats.sess_connect++;
211 case SSL23_ST_CW_CLNT_HELLO_A:
212 case SSL23_ST_CW_CLNT_HELLO_B:
215 ret = ssl23_client_hello(s);
218 s->state = SSL23_ST_CR_SRVR_HELLO_A;
223 case SSL23_ST_CR_SRVR_HELLO_A:
224 case SSL23_ST_CR_SRVR_HELLO_B:
225 ret = ssl23_get_server_hello(s);
232 SSLerr(SSL_F_SSL23_CONNECT, SSL_R_UNKNOWN_STATE);
239 (void)BIO_flush(s->wbio);
242 if ((cb != NULL) && (s->state != state)) {
243 new_state = s->state;
245 cb(s, SSL_CB_CONNECT_LOOP, 1);
246 s->state = new_state;
253 cb(s, SSL_CB_CONNECT_EXIT, ret);
258 * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
259 * failure, 1 on success.
261 int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
268 send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
270 send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
272 unsigned long Time = (unsigned long)time(NULL);
273 unsigned char *p = result;
275 return RAND_bytes(p, len - 4);
277 return RAND_bytes(result, len);
280 static int ssl23_client_hello(SSL *s)
283 unsigned char *p, *d;
286 int version = 0, version_major, version_minor;
288 #ifndef OPENSSL_NO_COMP
293 unsigned long mask, options = s->options;
296 * SSL_OP_NO_X disables all protocols above X *if* there are
297 * some protocols below X enabled. This is required in order
298 * to maintain "version capability" vector contiguous. So
299 * that if application wants to disable TLS1.0 in favour of
300 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
301 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
303 mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1
304 #if !defined(OPENSSL_NO_SSL3)
308 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
309 version = TLS1_2_VERSION;
311 if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
312 version = TLS1_1_VERSION;
314 version = TLS1_1_VERSION;
316 mask &= ~SSL_OP_NO_TLSv1_1;
317 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
318 version = TLS1_VERSION;
319 mask &= ~SSL_OP_NO_TLSv1;
320 #if !defined(OPENSSL_NO_SSL3)
321 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
322 version = SSL3_VERSION;
323 mask &= ~SSL_OP_NO_SSLv3;
326 buf = (unsigned char *)s->init_buf->data;
327 if (s->state == SSL23_ST_CW_CLNT_HELLO_A) {
328 p = s->s3->client_random;
329 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
332 if (version == TLS1_2_VERSION) {
333 version_major = TLS1_2_VERSION_MAJOR;
334 version_minor = TLS1_2_VERSION_MINOR;
335 } else if (tls1_suiteb(s)) {
336 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
337 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
339 } else if (version == TLS1_1_VERSION) {
340 version_major = TLS1_1_VERSION_MAJOR;
341 version_minor = TLS1_1_VERSION_MINOR;
342 } else if (version == TLS1_VERSION) {
343 version_major = TLS1_VERSION_MAJOR;
344 version_minor = TLS1_VERSION_MINOR;
345 } else if (FIPS_mode()) {
346 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
347 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
349 } else if (version == SSL3_VERSION) {
350 version_major = SSL3_VERSION_MAJOR;
351 version_minor = SSL3_VERSION_MINOR;
353 SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_PROTOCOLS_AVAILABLE);
357 s->client_version = version;
359 /* create Client Hello in SSL 3.0/TLS 1.0 format */
362 * do the record header (5 bytes) and handshake message header (4
367 *(p++) = version_major;
368 *(p++) = version_minor;
371 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
372 p += SSL3_RANDOM_SIZE;
374 /* Session ID (zero since there is no reuse) */
377 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
378 i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]),
379 ssl3_put_cipher_by_char);
381 SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
384 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
386 * Some servers hang if client hello > 256 bytes as hack workaround
387 * chop number of supported ciphers to keep it well below this if we
390 if (TLS1_get_version(s) >= TLS1_2_VERSION
391 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
392 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
398 #ifdef OPENSSL_NO_COMP
401 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
404 j = sk_SSL_COMP_num(s->ctx->comp_methods);
406 for (i = 0; i < j; i++) {
407 comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
411 *(p++) = 0; /* Add the NULL method */
413 #ifndef OPENSSL_NO_TLSEXT
415 if (ssl_prepare_clienthello_tlsext(s) <= 0) {
416 SSLerr(SSL_F_SSL23_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
420 ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
422 ssl3_send_alert(s, SSL3_AL_FATAL, al);
423 SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
430 /* fill in 4-byte handshake header */
432 *(d++) = SSL3_MT_CLIENT_HELLO;
437 if (l > SSL3_RT_MAX_PLAIN_LENGTH) {
438 SSLerr(SSL_F_SSL23_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
442 /* fill in 5-byte record header */
444 *(d++) = SSL3_RT_HANDSHAKE;
445 *(d++) = version_major;
447 * Some servers hang if we use long client hellos and a record number
450 if (TLS1_get_client_version(s) > TLS1_VERSION)
453 *(d++) = version_minor;
456 /* number of bytes to write */
457 s->init_num = p - buf;
460 ssl3_finish_mac(s, &(buf[5]), s->init_num - 5);
462 s->state = SSL23_ST_CW_CLNT_HELLO_B;
466 /* SSL3_ST_CW_CLNT_HELLO_B */
467 ret = ssl23_write_bytes(s);
469 if ((ret >= 2) && s->msg_callback) {
470 /* Client Hello has been sent; tell msg_callback */
471 s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s,
472 s->msg_callback_arg);
473 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data + 5,
474 ret - 5, s, s->msg_callback_arg);
480 static int ssl23_get_server_hello(SSL *s)
482 unsigned char buf[8];
487 n = ssl23_read_bytes(s, 7);
491 p = RECORD_LAYER_get_packet(&s->rlayer);
495 if (p[1] == SSL3_VERSION_MAJOR &&
496 p[2] <= TLS1_2_VERSION_MINOR &&
497 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
498 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2))) {
499 /* we have sslv3 or tls1 (server hello or alert) */
501 #ifndef OPENSSL_NO_SSL3
502 if ((p[2] == SSL3_VERSION_MINOR) && !(s->options & SSL_OP_NO_SSLv3)) {
504 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
505 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
508 s->version = SSL3_VERSION;
509 s->method = SSLv3_client_method();
512 if ((p[2] == TLS1_VERSION_MINOR) && !(s->options & SSL_OP_NO_TLSv1)) {
513 s->version = TLS1_VERSION;
514 s->method = TLSv1_client_method();
515 } else if ((p[2] == TLS1_1_VERSION_MINOR) &&
516 !(s->options & SSL_OP_NO_TLSv1_1)) {
517 s->version = TLS1_1_VERSION;
518 s->method = TLSv1_1_client_method();
519 } else if ((p[2] == TLS1_2_VERSION_MINOR) &&
520 !(s->options & SSL_OP_NO_TLSv1_2)) {
521 s->version = TLS1_2_VERSION;
522 s->method = TLSv1_2_client_method();
524 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL);
528 /* ensure that TLS_MAX_VERSION is up-to-date */
529 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
531 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) {
532 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW);
536 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING) {
539 void (*cb) (const SSL *ssl, int type, int val) = NULL;
542 if (s->info_callback != NULL)
543 cb = s->info_callback;
544 else if (s->ctx->info_callback != NULL)
545 cb = s->ctx->info_callback;
550 cb(s, SSL_CB_READ_ALERT, j);
553 if (s->msg_callback) {
554 s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s,
555 s->msg_callback_arg);
556 s->msg_callback(0, s->version, SSL3_RT_ALERT, p + 5, 2, s,
557 s->msg_callback_arg);
560 s->rwstate = SSL_NOTHING;
561 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_AD_REASON_OFFSET + p[6]);
565 if (!ssl_init_wbio_buffer(s, 1))
568 /* we are in this state */
569 s->state = SSL3_ST_CR_SRVR_HELLO_A;
572 * put the 7 bytes we have read into the input buffer for SSLv3
574 if (!RECORD_LAYER_set_data(&s->rlayer, buf, n))
577 s->handshake_func = s->method->ssl_connect;
579 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO, SSL_R_UNKNOWN_PROTOCOL);
585 * Since, if we are sending a ssl23 client hello, we are not reusing a
588 if (!ssl_get_new_session(s, 0))
591 return (SSL_connect(s));