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-rw-r--r--src/lib/libssl/s23_clnt.c615
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diff --git a/src/lib/libssl/s23_clnt.c b/src/lib/libssl/s23_clnt.c
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index 0000000000..bc918170e1
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+++ b/src/lib/libssl/s23_clnt.c
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1/* ssl/s23_clnt.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59#include <stdio.h>
60#include "ssl_locl.h"
61#include <openssl/buffer.h>
62#include <openssl/rand.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65
66static SSL_METHOD *ssl23_get_client_method(int ver);
67static int ssl23_client_hello(SSL *s);
68static int ssl23_get_server_hello(SSL *s);
69static SSL_METHOD *ssl23_get_client_method(int ver)
70 {
71#ifndef OPENSSL_NO_SSL2
72 if (ver == SSL2_VERSION)
73 return(SSLv2_client_method());
74#endif
75 if (ver == SSL3_VERSION)
76 return(SSLv3_client_method());
77 else if (ver == TLS1_VERSION)
78 return(TLSv1_client_method());
79 else
80 return(NULL);
81 }
82
83IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
84 ssl_undefined_function,
85 ssl23_connect,
86 ssl23_get_client_method)
87
88int ssl23_connect(SSL *s)
89 {
90 BUF_MEM *buf=NULL;
91 unsigned long Time=(unsigned long)time(NULL);
92 void (*cb)(const SSL *ssl,int type,int val)=NULL;
93 int ret= -1;
94 int new_state,state;
95
96 RAND_add(&Time,sizeof(Time),0);
97 ERR_clear_error();
98 clear_sys_error();
99
100 if (s->info_callback != NULL)
101 cb=s->info_callback;
102 else if (s->ctx->info_callback != NULL)
103 cb=s->ctx->info_callback;
104
105 s->in_handshake++;
106 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
107
108 for (;;)
109 {
110 state=s->state;
111
112 switch(s->state)
113 {
114 case SSL_ST_BEFORE:
115 case SSL_ST_CONNECT:
116 case SSL_ST_BEFORE|SSL_ST_CONNECT:
117 case SSL_ST_OK|SSL_ST_CONNECT:
118
119 if (s->session != NULL)
120 {
121 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
122 ret= -1;
123 goto end;
124 }
125 s->server=0;
126 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
127
128 /* s->version=TLS1_VERSION; */
129 s->type=SSL_ST_CONNECT;
130
131 if (s->init_buf == NULL)
132 {
133 if ((buf=BUF_MEM_new()) == NULL)
134 {
135 ret= -1;
136 goto end;
137 }
138 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
139 {
140 ret= -1;
141 goto end;
142 }
143 s->init_buf=buf;
144 buf=NULL;
145 }
146
147 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
148
149 ssl3_init_finished_mac(s);
150
151 s->state=SSL23_ST_CW_CLNT_HELLO_A;
152 s->ctx->stats.sess_connect++;
153 s->init_num=0;
154 break;
155
156 case SSL23_ST_CW_CLNT_HELLO_A:
157 case SSL23_ST_CW_CLNT_HELLO_B:
158
159 s->shutdown=0;
160 ret=ssl23_client_hello(s);
161 if (ret <= 0) goto end;
162 s->state=SSL23_ST_CR_SRVR_HELLO_A;
163 s->init_num=0;
164
165 break;
166
167 case SSL23_ST_CR_SRVR_HELLO_A:
168 case SSL23_ST_CR_SRVR_HELLO_B:
169 ret=ssl23_get_server_hello(s);
170 if (ret >= 0) cb=NULL;
171 goto end;
172 /* break; */
173
174 default:
175 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
176 ret= -1;
177 goto end;
178 /* break; */
179 }
180
181 if (s->debug) { (void)BIO_flush(s->wbio); }
182
183 if ((cb != NULL) && (s->state != state))
184 {
185 new_state=s->state;
186 s->state=state;
187 cb(s,SSL_CB_CONNECT_LOOP,1);
188 s->state=new_state;
189 }
190 }
191end:
192 s->in_handshake--;
193 if (buf != NULL)
194 BUF_MEM_free(buf);
195 if (cb != NULL)
196 cb(s,SSL_CB_CONNECT_EXIT,ret);
197 return(ret);
198 }
199
200
201static int ssl23_client_hello(SSL *s)
202 {
203 unsigned char *buf;
204 unsigned char *p,*d;
205 int i,j,ch_len;
206 unsigned long Time,l;
207 int ssl2_compat;
208 int version = 0, version_major, version_minor;
209 SSL_COMP *comp;
210 int ret;
211
212 ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
213
214 if (!(s->options & SSL_OP_NO_TLSv1))
215 {
216 version = TLS1_VERSION;
217 }
218 else if (!(s->options & SSL_OP_NO_SSLv3))
219 {
220 version = SSL3_VERSION;
221 }
222 else if (!(s->options & SSL_OP_NO_SSLv2))
223 {
224 version = SSL2_VERSION;
225 }
226#ifndef OPENSSL_NO_TLSEXT
227 if (version != SSL2_VERSION)
228 {
229 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
230
231 if (s->tlsext_hostname != NULL)
232 ssl2_compat = 0;
233 if (s->tlsext_status_type != -1)
234 ssl2_compat = 0;
235 }
236#endif
237
238 buf=(unsigned char *)s->init_buf->data;
239 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
240 {
241#if 0
242 /* don't reuse session-id's */
243 if (!ssl_get_new_session(s,0))
244 {
245 return(-1);
246 }
247#endif
248
249 p=s->s3->client_random;
250 Time=(unsigned long)time(NULL); /* Time */
251 l2n(Time,p);
252 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
253 return -1;
254
255 if (version == TLS1_VERSION)
256 {
257 version_major = TLS1_VERSION_MAJOR;
258 version_minor = TLS1_VERSION_MINOR;
259 }
260#ifdef OPENSSL_FIPS
261 else if(FIPS_mode())
262 {
263 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
264 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
265 return -1;
266 }
267#endif
268 else if (version == SSL3_VERSION)
269 {
270 version_major = SSL3_VERSION_MAJOR;
271 version_minor = SSL3_VERSION_MINOR;
272 }
273 else if (version == SSL2_VERSION)
274 {
275 version_major = SSL2_VERSION_MAJOR;
276 version_minor = SSL2_VERSION_MINOR;
277 }
278 else
279 {
280 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
281 return(-1);
282 }
283
284 s->client_version = version;
285
286 if (ssl2_compat)
287 {
288 /* create SSL 2.0 compatible Client Hello */
289
290 /* two byte record header will be written last */
291 d = &(buf[2]);
292 p = d + 9; /* leave space for message type, version, individual length fields */
293
294 *(d++) = SSL2_MT_CLIENT_HELLO;
295 *(d++) = version_major;
296 *(d++) = version_minor;
297
298 /* Ciphers supported */
299 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
300 if (i == 0)
301 {
302 /* no ciphers */
303 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
304 return -1;
305 }
306 s2n(i,d);
307 p+=i;
308
309 /* put in the session-id length (zero since there is no reuse) */
310#if 0
311 s->session->session_id_length=0;
312#endif
313 s2n(0,d);
314
315 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
316 ch_len=SSL2_CHALLENGE_LENGTH;
317 else
318 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
319
320 /* write out sslv2 challenge */
321 if (SSL3_RANDOM_SIZE < ch_len)
322 i=SSL3_RANDOM_SIZE;
323 else
324 i=ch_len;
325 s2n(i,d);
326 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
327 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
328 return -1;
329
330 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
331 p+=i;
332
333 i= p- &(buf[2]);
334 buf[0]=((i>>8)&0xff)|0x80;
335 buf[1]=(i&0xff);
336
337 /* number of bytes to write */
338 s->init_num=i+2;
339 s->init_off=0;
340
341 ssl3_finish_mac(s,&(buf[2]),i);
342 }
343 else
344 {
345 /* create Client Hello in SSL 3.0/TLS 1.0 format */
346
347 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
348 d = p = &(buf[9]);
349
350 *(p++) = version_major;
351 *(p++) = version_minor;
352
353 /* Random stuff */
354 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
355 p += SSL3_RANDOM_SIZE;
356
357 /* Session ID (zero since there is no reuse) */
358 *(p++) = 0;
359
360 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
361 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
362 if (i == 0)
363 {
364 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
365 return -1;
366 }
367 s2n(i,p);
368 p+=i;
369
370 /* COMPRESSION */
371 if (s->ctx->comp_methods == NULL)
372 j=0;
373 else
374 j=sk_SSL_COMP_num(s->ctx->comp_methods);
375 *(p++)=1+j;
376 for (i=0; i<j; i++)
377 {
378 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
379 *(p++)=comp->id;
380 }
381 *(p++)=0; /* Add the NULL method */
382#ifndef OPENSSL_NO_TLSEXT
383 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
384 {
385 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
386 return -1;
387 }
388#endif
389
390 l = p-d;
391 *p = 42;
392
393 /* fill in 4-byte handshake header */
394 d=&(buf[5]);
395 *(d++)=SSL3_MT_CLIENT_HELLO;
396 l2n3(l,d);
397
398 l += 4;
399
400 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
401 {
402 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
403 return -1;
404 }
405
406 /* fill in 5-byte record header */
407 d=buf;
408 *(d++) = SSL3_RT_HANDSHAKE;
409 *(d++) = version_major;
410 *(d++) = version_minor; /* arguably we should send the *lowest* suported version here
411 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
412 s2n((int)l,d);
413
414 /* number of bytes to write */
415 s->init_num=p-buf;
416 s->init_off=0;
417
418 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
419 }
420
421 s->state=SSL23_ST_CW_CLNT_HELLO_B;
422 s->init_off=0;
423 }
424
425 /* SSL3_ST_CW_CLNT_HELLO_B */
426 ret = ssl23_write_bytes(s);
427
428 if ((ret >= 2) && s->msg_callback)
429 {
430 /* Client Hello has been sent; tell msg_callback */
431
432 if (ssl2_compat)
433 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
434 else
435 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
436 }
437
438 return ret;
439 }
440
441static int ssl23_get_server_hello(SSL *s)
442 {
443 char buf[8];
444 unsigned char *p;
445 int i;
446 int n;
447
448 n=ssl23_read_bytes(s,7);
449
450 if (n != 7) return(n);
451 p=s->packet;
452
453 memcpy(buf,p,n);
454
455 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
456 (p[5] == 0x00) && (p[6] == 0x02))
457 {
458#ifdef OPENSSL_NO_SSL2
459 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
460 goto err;
461#else
462 /* we are talking sslv2 */
463 /* we need to clean up the SSLv3 setup and put in the
464 * sslv2 stuff. */
465 int ch_len;
466
467 if (s->options & SSL_OP_NO_SSLv2)
468 {
469 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
470 goto err;
471 }
472 if (s->s2 == NULL)
473 {
474 if (!ssl2_new(s))
475 goto err;
476 }
477 else
478 ssl2_clear(s);
479
480 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
481 ch_len=SSL2_CHALLENGE_LENGTH;
482 else
483 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
484
485 /* write out sslv2 challenge */
486 i=(SSL3_RANDOM_SIZE < ch_len)
487 ?SSL3_RANDOM_SIZE:ch_len;
488 s->s2->challenge_length=i;
489 memcpy(s->s2->challenge,
490 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
491
492 if (s->s3 != NULL) ssl3_free(s);
493
494 if (!BUF_MEM_grow_clean(s->init_buf,
495 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
496 {
497 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
498 goto err;
499 }
500
501 s->state=SSL2_ST_GET_SERVER_HELLO_A;
502 if (!(s->client_version == SSL2_VERSION))
503 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
504 s->s2->ssl2_rollback=1;
505
506 /* setup the 5 bytes we have read so we get them from
507 * the sslv2 buffer */
508 s->rstate=SSL_ST_READ_HEADER;
509 s->packet_length=n;
510 s->packet= &(s->s2->rbuf[0]);
511 memcpy(s->packet,buf,n);
512 s->s2->rbuf_left=n;
513 s->s2->rbuf_offs=0;
514
515 /* we have already written one */
516 s->s2->write_sequence=1;
517
518 s->method=SSLv2_client_method();
519 s->handshake_func=s->method->ssl_connect;
520#endif
521 }
522 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
523 (p[1] == SSL3_VERSION_MAJOR) &&
524 ((p[2] == SSL3_VERSION_MINOR) ||
525 (p[2] == TLS1_VERSION_MINOR)) &&
526 (p[5] == SSL3_MT_SERVER_HELLO))
527 {
528 /* we have sslv3 or tls1 */
529
530 if (!ssl_init_wbio_buffer(s,1)) goto err;
531
532 /* we are in this state */
533 s->state=SSL3_ST_CR_SRVR_HELLO_A;
534
535 /* put the 5 bytes we have read into the input buffer
536 * for SSLv3 */
537 s->rstate=SSL_ST_READ_HEADER;
538 s->packet_length=n;
539 s->packet= &(s->s3->rbuf.buf[0]);
540 memcpy(s->packet,buf,n);
541 s->s3->rbuf.left=n;
542 s->s3->rbuf.offset=0;
543
544 if ((p[2] == SSL3_VERSION_MINOR) &&
545 !(s->options & SSL_OP_NO_SSLv3))
546 {
547#ifdef OPENSSL_FIPS
548 if(FIPS_mode())
549 {
550 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
551 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
552 goto err;
553 }
554#endif
555 s->version=SSL3_VERSION;
556 s->method=SSLv3_client_method();
557 }
558 else if ((p[2] == TLS1_VERSION_MINOR) &&
559 !(s->options & SSL_OP_NO_TLSv1))
560 {
561 s->version=TLS1_VERSION;
562 s->method=TLSv1_client_method();
563 }
564 else
565 {
566 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
567 goto err;
568 }
569
570 s->handshake_func=s->method->ssl_connect;
571 }
572 else if ((p[0] == SSL3_RT_ALERT) &&
573 (p[1] == SSL3_VERSION_MAJOR) &&
574 ((p[2] == SSL3_VERSION_MINOR) ||
575 (p[2] == TLS1_VERSION_MINOR)) &&
576 (p[3] == 0) &&
577 (p[4] == 2))
578 {
579 void (*cb)(const SSL *ssl,int type,int val)=NULL;
580 int j;
581
582 /* An alert */
583 if (s->info_callback != NULL)
584 cb=s->info_callback;
585 else if (s->ctx->info_callback != NULL)
586 cb=s->ctx->info_callback;
587
588 i=p[5];
589 if (cb != NULL)
590 {
591 j=(i<<8)|p[6];
592 cb(s,SSL_CB_READ_ALERT,j);
593 }
594
595 s->rwstate=SSL_NOTHING;
596 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
597 goto err;
598 }
599 else
600 {
601 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
602 goto err;
603 }
604 s->init_num=0;
605
606 /* Since, if we are sending a ssl23 client hello, we are not
607 * reusing a session-id */
608 if (!ssl_get_new_session(s,0))
609 goto err;
610
611 return(SSL_connect(s));
612err:
613 return(-1);
614 }
615
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