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-rw-r--r--src/lib/libssl/s23_clnt.c466
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diff --git a/src/lib/libssl/s23_clnt.c 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 "buffer.h"
61#include "rand.h"
62#include "objects.h"
63#include "evp.h"
64#include "ssl_locl.h"
65
66#define BREAK break
67
68#ifndef NOPROTO
69static int ssl23_client_hello(SSL *s);
70static int ssl23_get_server_hello(SSL *s);
71#else
72static int ssl23_client_hello();
73static int ssl23_get_server_hello();
74#endif
75
76static SSL_METHOD *ssl23_get_client_method(ver)
77int ver;
78 {
79 if (ver == SSL2_VERSION)
80 return(SSLv2_client_method());
81 else if (ver == SSL3_VERSION)
82 return(SSLv3_client_method());
83 else if (ver == TLS1_VERSION)
84 return(TLSv1_client_method());
85 else
86 return(NULL);
87 }
88
89SSL_METHOD *SSLv23_client_method()
90 {
91 static int init=1;
92 static SSL_METHOD SSLv23_client_data;
93
94 if (init)
95 {
96 init=0;
97 memcpy((char *)&SSLv23_client_data,
98 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
99 SSLv23_client_data.ssl_connect=ssl23_connect;
100 SSLv23_client_data.get_ssl_method=ssl23_get_client_method;
101 }
102 return(&SSLv23_client_data);
103 }
104
105int ssl23_connect(s)
106SSL *s;
107 {
108 BUF_MEM *buf;
109 unsigned long Time=time(NULL);
110 void (*cb)()=NULL;
111 int ret= -1;
112 int new_state,state;
113
114 RAND_seed((unsigned char *)&Time,sizeof(Time));
115 ERR_clear_error();
116 clear_sys_error();
117
118 if (s->info_callback != NULL)
119 cb=s->info_callback;
120 else if (s->ctx->info_callback != NULL)
121 cb=s->ctx->info_callback;
122
123 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
124 s->in_handshake++;
125
126 for (;;)
127 {
128 state=s->state;
129
130 switch(s->state)
131 {
132 case SSL_ST_BEFORE:
133 case SSL_ST_CONNECT:
134 case SSL_ST_BEFORE|SSL_ST_CONNECT:
135 case SSL_ST_OK|SSL_ST_CONNECT:
136
137 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
138
139 /* s->version=TLS1_VERSION; */
140 s->type=SSL_ST_CONNECT;
141
142 if (s->init_buf == NULL)
143 {
144 if ((buf=BUF_MEM_new()) == NULL)
145 {
146 ret= -1;
147 goto end;
148 }
149 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
150 {
151 ret= -1;
152 goto end;
153 }
154 s->init_buf=buf;
155 }
156
157 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
158
159 ssl3_init_finished_mac(s);
160
161 s->state=SSL23_ST_CW_CLNT_HELLO_A;
162 s->ctx->sess_connect++;
163 s->init_num=0;
164 break;
165
166 case SSL23_ST_CW_CLNT_HELLO_A:
167 case SSL23_ST_CW_CLNT_HELLO_B:
168
169 s->shutdown=0;
170 ret=ssl23_client_hello(s);
171 if (ret <= 0) goto end;
172 s->state=SSL23_ST_CR_SRVR_HELLO_A;
173 s->init_num=0;
174
175 break;
176
177 case SSL23_ST_CR_SRVR_HELLO_A:
178 case SSL23_ST_CR_SRVR_HELLO_B:
179 ret=ssl23_get_server_hello(s);
180 if (ret >= 0) cb=NULL;
181 goto end;
182 break;
183
184 default:
185 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
186 ret= -1;
187 goto end;
188 /* break; */
189 }
190
191 if (s->debug) BIO_flush(s->wbio);
192
193 if ((cb != NULL) && (s->state != state))
194 {
195 new_state=s->state;
196 s->state=state;
197 cb(s,SSL_CB_CONNECT_LOOP,1);
198 s->state=new_state;
199 }
200 }
201end:
202 s->in_handshake--;
203 if (cb != NULL)
204 cb(s,SSL_CB_CONNECT_EXIT,ret);
205 return(ret);
206 }
207
208
209static int ssl23_client_hello(s)
210SSL *s;
211 {
212 unsigned char *buf;
213 unsigned char *p,*d;
214 int i,ch_len;
215
216 buf=(unsigned char *)s->init_buf->data;
217 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
218 {
219#if 0
220 /* don't reuse session-id's */
221 if (!ssl_get_new_session(s,0))
222 {
223 return(-1);
224 }
225#endif
226
227 p=s->s3->client_random;
228 RAND_bytes(p,SSL3_RANDOM_SIZE);
229
230 /* Do the message type and length last */
231 d= &(buf[2]);
232 p=d+9;
233
234 *(d++)=SSL2_MT_CLIENT_HELLO;
235 if (!(s->options & SSL_OP_NO_TLSv1))
236 {
237 *(d++)=TLS1_VERSION_MAJOR;
238 *(d++)=TLS1_VERSION_MINOR;
239 }
240 else if (!(s->options & SSL_OP_NO_SSLv3))
241 {
242 *(d++)=SSL3_VERSION_MAJOR;
243 *(d++)=SSL3_VERSION_MINOR;
244 }
245 else if (!(s->options & SSL_OP_NO_SSLv2))
246 {
247 *(d++)=SSL2_VERSION_MAJOR;
248 *(d++)=SSL2_VERSION_MINOR;
249 }
250 else
251 {
252 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
253 return(-1);
254 }
255
256 /* Ciphers supported */
257 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p);
258 if (i == 0)
259 {
260 /* no ciphers */
261 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
262 return(-1);
263 }
264 s2n(i,d);
265 p+=i;
266
267 /* put in the session-id, zero since there is no
268 * reuse. */
269#if 0
270 s->session->session_id_length=0;
271#endif
272 s2n(0,d);
273
274 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
275 ch_len=SSL2_CHALLENGE_LENGTH;
276 else
277 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
278
279 /* write out sslv2 challenge */
280 if (SSL3_RANDOM_SIZE < ch_len)
281 i=SSL3_RANDOM_SIZE;
282 else
283 i=ch_len;
284 s2n(i,d);
285 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
286 RAND_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
287 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
288 p+=i;
289
290 i= p- &(buf[2]);
291 buf[0]=((i>>8)&0xff)|0x80;
292 buf[1]=(i&0xff);
293
294 s->state=SSL23_ST_CW_CLNT_HELLO_B;
295 /* number of bytes to write */
296 s->init_num=i+2;
297 s->init_off=0;
298
299 ssl3_finish_mac(s,&(buf[2]),i);
300 }
301
302 /* SSL3_ST_CW_CLNT_HELLO_B */
303 return(ssl23_write_bytes(s));
304 }
305
306static int ssl23_get_server_hello(s)
307SSL *s;
308 {
309 char buf[8];
310 unsigned char *p;
311 int i,ch_len;
312 int n;
313
314 n=ssl23_read_bytes(s,7);
315
316 if (n != 7) return(n);
317 p=s->packet;
318
319 memcpy(buf,p,n);
320
321 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
322 (p[5] == 0x00) && (p[6] == 0x02))
323 {
324 /* we are talking sslv2 */
325 /* we need to clean up the SSLv3 setup and put in the
326 * sslv2 stuff. */
327
328 if (s->options & SSL_OP_NO_SSLv2)
329 {
330 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
331 goto err;
332 }
333 if (s->s2 == NULL)
334 {
335 if (!ssl2_new(s))
336 goto err;
337 }
338 else
339 ssl2_clear(s);
340
341 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
342 ch_len=SSL2_CHALLENGE_LENGTH;
343 else
344 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
345
346 /* write out sslv2 challenge */
347 i=(SSL3_RANDOM_SIZE < ch_len)
348 ?SSL3_RANDOM_SIZE:ch_len;
349 s->s2->challenge_length=i;
350 memcpy(s->s2->challenge,
351 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
352
353 if (s->s3 != NULL) ssl3_free(s);
354
355 if (!BUF_MEM_grow(s->init_buf,
356 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
357 {
358 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
359 goto err;
360 }
361
362 s->state=SSL2_ST_GET_SERVER_HELLO_A;
363 s->s2->ssl2_rollback=1;
364
365 /* setup the 5 bytes we have read so we get them from
366 * the sslv2 buffer */
367 s->rstate=SSL_ST_READ_HEADER;
368 s->packet_length=n;
369 s->packet= &(s->s2->rbuf[0]);
370 memcpy(s->packet,buf,n);
371 s->s2->rbuf_left=n;
372 s->s2->rbuf_offs=0;
373
374 /* we have already written one */
375 s->s2->write_sequence=1;
376
377 s->method=SSLv2_client_method();
378 s->handshake_func=s->method->ssl_connect;
379 }
380 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
381 (p[1] == SSL3_VERSION_MAJOR) &&
382 ((p[2] == SSL3_VERSION_MINOR) ||
383 (p[2] == TLS1_VERSION_MINOR)) &&
384 (p[5] == SSL3_MT_SERVER_HELLO))
385 {
386 /* we have sslv3 or tls1 */
387
388 if (!ssl_init_wbio_buffer(s,1)) goto err;
389
390 /* we are in this state */
391 s->state=SSL3_ST_CR_SRVR_HELLO_A;
392
393 /* put the 5 bytes we have read into the input buffer
394 * for SSLv3 */
395 s->rstate=SSL_ST_READ_HEADER;
396 s->packet_length=n;
397 s->packet= &(s->s3->rbuf.buf[0]);
398 memcpy(s->packet,buf,n);
399 s->s3->rbuf.left=n;
400 s->s3->rbuf.offset=0;
401
402 if ((p[2] == SSL3_VERSION_MINOR) &&
403 !(s->options & SSL_OP_NO_SSLv3))
404 {
405 s->version=SSL3_VERSION;
406 s->method=SSLv3_client_method();
407 }
408 else if ((p[2] == TLS1_VERSION_MINOR) &&
409 !(s->options & SSL_OP_NO_TLSv1))
410 {
411 s->version=TLS1_VERSION;
412 s->method=TLSv1_client_method();
413 }
414 else
415 {
416 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
417 goto err;
418 }
419
420 s->handshake_func=s->method->ssl_connect;
421 }
422 else if ((p[0] == SSL3_RT_ALERT) &&
423 (p[1] == SSL3_VERSION_MAJOR) &&
424 ((p[2] == SSL3_VERSION_MINOR) ||
425 (p[2] == TLS1_VERSION_MINOR)) &&
426 (p[3] == 0) &&
427 (p[4] == 2))
428 {
429 void (*cb)()=NULL;
430 int j;
431
432 /* An alert */
433 if (s->info_callback != NULL)
434 cb=s->info_callback;
435 else if (s->ctx->info_callback != NULL)
436 cb=s->ctx->info_callback;
437
438 i=p[5];
439 if (cb != NULL)
440 {
441 j=(i<<8)|p[6];
442 cb(s,SSL_CB_READ_ALERT,j);
443 }
444
445 s->rwstate=SSL_NOTHING;
446 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,1000+p[6]);
447 goto err;
448 }
449 else
450 {
451 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
452 goto err;
453 }
454 s->init_num=0;
455
456 /* Since, if we are sending a ssl23 client hello, we are not
457 * reusing a session-id */
458 if (!ssl_get_new_session(s,0))
459 goto err;
460
461 s->first_packet=1;
462 return(SSL_connect(s));
463err:
464 return(-1);
465 }
466
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