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);
122 static const SSL_METHOD *ssl23_get_client_method(int ver)
124 #ifndef OPENSSL_NO_SSL3
125 if (ver == SSL3_VERSION)
126 return(SSLv3_client_method());
128 if (ver == TLS1_VERSION)
129 return(TLSv1_client_method());
130 else if (ver == TLS1_1_VERSION)
131 return(TLSv1_1_client_method());
132 else if (ver == TLS1_2_VERSION)
133 return(TLSv1_2_client_method());
138 IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
139 ssl_undefined_function,
141 ssl23_get_client_method)
143 int ssl23_connect(SSL *s)
146 unsigned long Time=(unsigned long)time(NULL);
147 void (*cb)(const SSL *ssl,int type,int val)=NULL;
151 RAND_add(&Time,sizeof(Time),0);
155 if (s->info_callback != NULL)
157 else if (s->ctx->info_callback != NULL)
158 cb=s->ctx->info_callback;
161 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
171 case SSL_ST_BEFORE|SSL_ST_CONNECT:
172 case SSL_ST_OK|SSL_ST_CONNECT:
174 if (s->session != NULL)
176 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
181 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
183 /* s->version=TLS1_VERSION; */
184 s->type=SSL_ST_CONNECT;
186 if (s->init_buf == NULL)
188 if ((buf=BUF_MEM_new()) == NULL)
193 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
202 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
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);
216 if (ret <= 0) goto end;
217 s->state=SSL23_ST_CR_SRVR_HELLO_A;
222 case SSL23_ST_CR_SRVR_HELLO_A:
223 case SSL23_ST_CR_SRVR_HELLO_B:
224 ret=ssl23_get_server_hello(s);
225 if (ret >= 0) cb=NULL;
230 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
236 if (s->debug) { (void)BIO_flush(s->wbio); }
238 if ((cb != NULL) && (s->state != state))
242 cb(s,SSL_CB_CONNECT_LOOP,1);
251 cb(s,SSL_CB_CONNECT_EXIT,ret);
255 /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0
256 * on failure, 1 on success. */
257 int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
263 send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
265 send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
268 unsigned long Time = (unsigned long)time(NULL);
269 unsigned char *p = result;
271 return RAND_pseudo_bytes(p, len-4);
274 return RAND_pseudo_bytes(result, len);
277 static int ssl23_client_hello(SSL *s)
283 int version = 0, version_major, version_minor;
285 #ifndef OPENSSL_NO_COMP
290 unsigned long mask, options = s->options;
293 * SSL_OP_NO_X disables all protocols above X *if* there are
294 * some protocols below X enabled. This is required in order
295 * to maintain "version capability" vector contiguous. So
296 * that if application wants to disable TLS1.0 in favour of
297 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
298 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
300 mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
301 #if !defined(OPENSSL_NO_SSL3)
305 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
306 version = TLS1_2_VERSION;
308 if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
309 version = TLS1_1_VERSION;
311 version = TLS1_1_VERSION;
313 mask &= ~SSL_OP_NO_TLSv1_1;
314 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
315 version = TLS1_VERSION;
316 mask &= ~SSL_OP_NO_TLSv1;
317 #if !defined(OPENSSL_NO_SSL3)
318 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
319 version = SSL3_VERSION;
320 mask &= ~SSL_OP_NO_SSLv3;
323 buf=(unsigned char *)s->init_buf->data;
324 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
327 /* don't reuse session-id's */
328 if (!ssl_get_new_session(s,0))
334 p=s->s3->client_random;
335 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
338 if (version == TLS1_2_VERSION)
340 version_major = TLS1_2_VERSION_MAJOR;
341 version_minor = TLS1_2_VERSION_MINOR;
343 else if (tls1_suiteb(s))
345 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
346 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
349 else if (version == TLS1_1_VERSION)
351 version_major = TLS1_1_VERSION_MAJOR;
352 version_minor = TLS1_1_VERSION_MINOR;
354 else if (version == TLS1_VERSION)
356 version_major = TLS1_VERSION_MAJOR;
357 version_minor = TLS1_VERSION_MINOR;
362 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
363 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
367 else if (version == SSL3_VERSION)
369 version_major = SSL3_VERSION_MAJOR;
370 version_minor = SSL3_VERSION_MINOR;
374 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
378 s->client_version = version;
380 /* create Client Hello in SSL 3.0/TLS 1.0 format */
382 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
385 *(p++) = version_major;
386 *(p++) = version_minor;
389 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
390 p += SSL3_RANDOM_SIZE;
392 /* Session ID (zero since there is no reuse) */
395 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
396 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
399 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
402 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
403 /* Some servers hang if client hello > 256 bytes
404 * as hack workaround chop number of supported ciphers
405 * to keep it well below this if we use TLS v1.2
407 if (TLS1_get_version(s) >= TLS1_2_VERSION
408 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
409 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
415 #ifdef OPENSSL_NO_COMP
418 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
421 j=sk_SSL_COMP_num(s->ctx->comp_methods);
425 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
429 *(p++)=0; /* Add the NULL method */
431 #ifndef OPENSSL_NO_TLSEXT
433 if (ssl_prepare_clienthello_tlsext(s) <= 0)
435 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
438 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
440 ssl3_send_alert(s,SSL3_AL_FATAL,al);
441 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
448 /* fill in 4-byte handshake header */
450 *(d++)=SSL3_MT_CLIENT_HELLO;
455 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
457 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
461 /* fill in 5-byte record header */
463 *(d++) = SSL3_RT_HANDSHAKE;
464 *(d++) = version_major;
465 /* Some servers hang if we use long client hellos
466 * and a record number > TLS 1.0.
468 if (TLS1_get_client_version(s) > TLS1_VERSION)
471 *(d++) = version_minor;
474 /* number of bytes to write */
478 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
480 s->state=SSL23_ST_CW_CLNT_HELLO_B;
484 /* SSL3_ST_CW_CLNT_HELLO_B */
485 ret = ssl23_write_bytes(s);
487 if ((ret >= 2) && s->msg_callback)
489 /* Client Hello has been sent; tell msg_callback */
490 s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg);
491 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
497 static int ssl23_get_server_hello(SSL *s)
504 n=ssl23_read_bytes(s,7);
506 if (n != 7) return(n);
511 if (p[1] == SSL3_VERSION_MAJOR &&
512 p[2] <= TLS1_2_VERSION_MINOR &&
513 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
514 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
516 /* we have sslv3 or tls1 (server hello or alert) */
518 #ifndef OPENSSL_NO_SSL3
519 if ((p[2] == SSL3_VERSION_MINOR) &&
520 !(s->options & SSL_OP_NO_SSLv3))
525 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
526 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
530 s->version=SSL3_VERSION;
531 s->method=SSLv3_client_method();
535 if ((p[2] == TLS1_VERSION_MINOR) &&
536 !(s->options & SSL_OP_NO_TLSv1))
538 s->version=TLS1_VERSION;
539 s->method=TLSv1_client_method();
541 else if ((p[2] == TLS1_1_VERSION_MINOR) &&
542 !(s->options & SSL_OP_NO_TLSv1_1))
544 s->version=TLS1_1_VERSION;
545 s->method=TLSv1_1_client_method();
547 else if ((p[2] == TLS1_2_VERSION_MINOR) &&
548 !(s->options & SSL_OP_NO_TLSv1_2))
550 s->version=TLS1_2_VERSION;
551 s->method=TLSv1_2_client_method();
555 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
559 /* ensure that TLS_MAX_VERSION is up-to-date */
560 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
562 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
564 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW);
568 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
572 void (*cb)(const SSL *ssl,int type,int val)=NULL;
575 if (s->info_callback != NULL)
577 else if (s->ctx->info_callback != NULL)
578 cb=s->ctx->info_callback;
584 cb(s,SSL_CB_READ_ALERT,j);
589 s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg);
590 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
593 s->rwstate=SSL_NOTHING;
594 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
598 if (!ssl_init_wbio_buffer(s,1)) goto err;
600 /* we are in this state */
601 s->state=SSL3_ST_CR_SRVR_HELLO_A;
603 /* put the 7 bytes we have read into the input buffer
605 s->rstate=SSL_ST_READ_HEADER;
607 if (s->s3->rbuf.buf == NULL)
608 if (!ssl3_setup_read_buffer(s))
610 s->packet= &(s->s3->rbuf.buf[0]);
611 memcpy(s->packet,buf,n);
613 s->s3->rbuf.offset=0;
615 s->handshake_func=s->method->ssl_connect;
619 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
624 /* Since, if we are sending a ssl23 client hello, we are not
625 * reusing a session-id */
626 if (!ssl_get_new_session(s,0))
629 return(SSL_connect(s));