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.]
61 #include <openssl/buffer.h>
62 #include <openssl/rand.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
66 static SSL_METHOD *ssl23_get_client_method(int ver);
67 static int ssl23_client_hello(SSL *s);
68 static int ssl23_get_server_hello(SSL *s);
69 static SSL_METHOD *ssl23_get_client_method(int ver)
71 #ifndef OPENSSL_NO_SSL2
72 if (ver == SSL2_VERSION)
73 return(SSLv2_client_method());
75 #ifndef OPENSSL_NO_SSL3
76 if (ver == SSL3_VERSION)
77 return(SSLv3_client_method());
79 if (ver == TLS1_VERSION)
80 return(TLSv1_client_method());
85 IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
86 ssl_undefined_function,
88 ssl23_get_client_method)
90 int ssl23_connect(SSL *s)
93 unsigned long Time=(unsigned long)time(NULL);
94 void (*cb)(const SSL *ssl,int type,int val)=NULL;
98 RAND_add(&Time,sizeof(Time),0);
102 if (s->info_callback != NULL)
104 else if (s->ctx->info_callback != NULL)
105 cb=s->ctx->info_callback;
108 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
118 case SSL_ST_BEFORE|SSL_ST_CONNECT:
119 case SSL_ST_OK|SSL_ST_CONNECT:
121 if (s->session != NULL)
123 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
128 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
130 /* s->version=TLS1_VERSION; */
131 s->type=SSL_ST_CONNECT;
133 if (s->init_buf == NULL)
135 if ((buf=BUF_MEM_new()) == NULL)
140 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
149 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
151 ssl3_init_finished_mac(s);
153 s->state=SSL23_ST_CW_CLNT_HELLO_A;
154 s->ctx->stats.sess_connect++;
158 case SSL23_ST_CW_CLNT_HELLO_A:
159 case SSL23_ST_CW_CLNT_HELLO_B:
162 ret=ssl23_client_hello(s);
163 if (ret <= 0) goto end;
164 s->state=SSL23_ST_CR_SRVR_HELLO_A;
169 case SSL23_ST_CR_SRVR_HELLO_A:
170 case SSL23_ST_CR_SRVR_HELLO_B:
171 ret=ssl23_get_server_hello(s);
172 if (ret >= 0) cb=NULL;
177 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
183 if (s->debug) { (void)BIO_flush(s->wbio); }
185 if ((cb != NULL) && (s->state != state))
189 cb(s,SSL_CB_CONNECT_LOOP,1);
198 cb(s,SSL_CB_CONNECT_EXIT,ret);
203 static int ssl23_client_hello(SSL *s)
208 unsigned long Time,l;
210 int version = 0, version_major, version_minor;
211 #ifndef OPENSSL_NO_COMP
217 ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
219 if (!(s->options & SSL_OP_NO_TLSv1))
221 version = TLS1_VERSION;
223 else if (!(s->options & SSL_OP_NO_SSLv3))
225 version = SSL3_VERSION;
227 else if (!(s->options & SSL_OP_NO_SSLv2))
229 version = SSL2_VERSION;
231 #ifndef OPENSSL_NO_TLSEXT
232 if (version != SSL2_VERSION)
234 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
236 if (s->tlsext_hostname != NULL)
238 if (s->tlsext_status_type != -1)
243 buf=(unsigned char *)s->init_buf->data;
244 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
247 /* don't reuse session-id's */
248 if (!ssl_get_new_session(s,0))
254 p=s->s3->client_random;
255 Time=(unsigned long)time(NULL); /* Time */
257 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
260 if (version == TLS1_VERSION)
262 version_major = TLS1_VERSION_MAJOR;
263 version_minor = TLS1_VERSION_MINOR;
268 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
269 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
273 else if (version == SSL3_VERSION)
275 version_major = SSL3_VERSION_MAJOR;
276 version_minor = SSL3_VERSION_MINOR;
278 else if (version == SSL2_VERSION)
280 version_major = SSL2_VERSION_MAJOR;
281 version_minor = SSL2_VERSION_MINOR;
285 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
289 s->client_version = version;
293 /* create SSL 2.0 compatible Client Hello */
295 /* two byte record header will be written last */
297 p = d + 9; /* leave space for message type, version, individual length fields */
299 *(d++) = SSL2_MT_CLIENT_HELLO;
300 *(d++) = version_major;
301 *(d++) = version_minor;
303 /* Ciphers supported */
304 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
308 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
314 /* put in the session-id length (zero since there is no reuse) */
316 s->session->session_id_length=0;
320 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
321 ch_len=SSL2_CHALLENGE_LENGTH;
323 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
325 /* write out sslv2 challenge */
326 if (SSL3_RANDOM_SIZE < ch_len)
331 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
332 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
335 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
339 buf[0]=((i>>8)&0xff)|0x80;
342 /* number of bytes to write */
346 ssl3_finish_mac(s,&(buf[2]),i);
350 /* create Client Hello in SSL 3.0/TLS 1.0 format */
352 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
355 *(p++) = version_major;
356 *(p++) = version_minor;
359 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
360 p += SSL3_RANDOM_SIZE;
362 /* Session ID (zero since there is no reuse) */
365 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
366 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
369 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
374 #ifdef OPENSSL_NO_COMP
378 if (s->ctx->comp_methods == NULL)
381 j=sk_SSL_COMP_num(s->ctx->comp_methods);
385 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
389 *(p++)=0; /* Add the NULL method */
390 #ifndef OPENSSL_NO_TLSEXT
391 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
393 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
401 /* fill in 4-byte handshake header */
403 *(d++)=SSL3_MT_CLIENT_HELLO;
408 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
410 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
414 /* fill in 5-byte record header */
416 *(d++) = SSL3_RT_HANDSHAKE;
417 *(d++) = version_major;
418 *(d++) = version_minor; /* arguably we should send the *lowest* suported version here
419 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
422 /* number of bytes to write */
426 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
429 s->state=SSL23_ST_CW_CLNT_HELLO_B;
433 /* SSL3_ST_CW_CLNT_HELLO_B */
434 ret = ssl23_write_bytes(s);
436 if ((ret >= 2) && s->msg_callback)
438 /* Client Hello has been sent; tell msg_callback */
441 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
443 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
449 static int ssl23_get_server_hello(SSL *s)
456 n=ssl23_read_bytes(s,7);
458 if (n != 7) return(n);
463 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
464 (p[5] == 0x00) && (p[6] == 0x02))
466 #ifdef OPENSSL_NO_SSL2
467 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
470 /* we are talking sslv2 */
471 /* we need to clean up the SSLv3 setup and put in the
475 if (s->options & SSL_OP_NO_SSLv2)
477 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
488 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
489 ch_len=SSL2_CHALLENGE_LENGTH;
491 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
493 /* write out sslv2 challenge */
494 i=(SSL3_RANDOM_SIZE < ch_len)
495 ?SSL3_RANDOM_SIZE:ch_len;
496 s->s2->challenge_length=i;
497 memcpy(s->s2->challenge,
498 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
500 if (s->s3 != NULL) ssl3_free(s);
502 if (!BUF_MEM_grow_clean(s->init_buf,
503 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
505 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
509 s->state=SSL2_ST_GET_SERVER_HELLO_A;
510 if (!(s->client_version == SSL2_VERSION))
511 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
512 s->s2->ssl2_rollback=1;
514 /* setup the 7 bytes we have read so we get them from
515 * the sslv2 buffer */
516 s->rstate=SSL_ST_READ_HEADER;
518 s->packet= &(s->s2->rbuf[0]);
519 memcpy(s->packet,buf,n);
523 /* we have already written one */
524 s->s2->write_sequence=1;
526 s->method=SSLv2_client_method();
527 s->handshake_func=s->method->ssl_connect;
530 else if (p[1] == SSL3_VERSION_MAJOR &&
531 ((p[2] == SSL3_VERSION_MINOR) ||
532 (p[2] == TLS1_VERSION_MINOR)) &&
533 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
534 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
536 /* we have sslv3 or tls1 (server hello or alert) */
538 #ifndef OPENSSL_NO_SSL3
539 if ((p[2] == SSL3_VERSION_MINOR) &&
540 !(s->options & SSL_OP_NO_SSLv3))
545 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
546 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
550 s->version=SSL3_VERSION;
551 s->method=SSLv3_client_method();
555 if ((p[2] == TLS1_VERSION_MINOR) &&
556 !(s->options & SSL_OP_NO_TLSv1))
558 s->version=TLS1_VERSION;
559 s->method=TLSv1_client_method();
563 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
567 /* ensure that TLS_MAX_VERSION is up-to-date */
568 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
570 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
574 void (*cb)(const SSL *ssl,int type,int val)=NULL;
577 if (s->info_callback != NULL)
579 else if (s->ctx->info_callback != NULL)
580 cb=s->ctx->info_callback;
586 cb(s,SSL_CB_READ_ALERT,j);
590 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
592 s->rwstate=SSL_NOTHING;
593 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
597 if (!ssl_init_wbio_buffer(s,1)) goto err;
599 /* we are in this state */
600 s->state=SSL3_ST_CR_SRVR_HELLO_A;
602 /* put the 7 bytes we have read into the input buffer
604 s->rstate=SSL_ST_READ_HEADER;
606 if (s->s3->rbuf.buf == NULL)
607 if (!ssl3_setup_buffers(s))
609 s->packet= &(s->s3->rbuf.buf[0]);
610 memcpy(s->packet,buf,n);
612 s->s3->rbuf.offset=0;
614 s->handshake_func=s->method->ssl_connect;
618 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
623 /* Since, if we are sending a ssl23 client hello, we are not
624 * reusing a session-id */
625 if (!ssl_get_new_session(s,0))
628 return(SSL_connect(s));