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-rw-r--r--src/lib/libssl/s23_srvr.c499
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diff --git a/src/lib/libssl/s23_srvr.c b/src/lib/libssl/s23_srvr.c
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1/* ssl/s23_srvr.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
69int ssl23_get_client_hello(SSL *s);
70#else
71int ssl23_get_client_hello();
72#endif
73
74static SSL_METHOD *ssl23_get_server_method(ver)
75int ver;
76 {
77 if (ver == SSL2_VERSION)
78 return(SSLv2_server_method());
79 else if (ver == SSL3_VERSION)
80 return(SSLv3_server_method());
81 else if (ver == TLS1_VERSION)
82 return(TLSv1_server_method());
83 else
84 return(NULL);
85 }
86
87SSL_METHOD *SSLv23_server_method()
88 {
89 static int init=1;
90 static SSL_METHOD SSLv23_server_data;
91
92 if (init)
93 {
94 init=0;
95 memcpy((char *)&SSLv23_server_data,
96 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
97 SSLv23_server_data.ssl_accept=ssl23_accept;
98 SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
99 }
100 return(&SSLv23_server_data);
101 }
102
103int ssl23_accept(s)
104SSL *s;
105 {
106 BUF_MEM *buf;
107 unsigned long Time=time(NULL);
108 void (*cb)()=NULL;
109 int ret= -1;
110 int new_state,state;
111
112 RAND_seed((unsigned char *)&Time,sizeof(Time));
113 ERR_clear_error();
114 clear_sys_error();
115
116 if (s->info_callback != NULL)
117 cb=s->info_callback;
118 else if (s->ctx->info_callback != NULL)
119 cb=s->ctx->info_callback;
120
121 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
122 s->in_handshake++;
123
124 for (;;)
125 {
126 state=s->state;
127
128 switch(s->state)
129 {
130 case SSL_ST_BEFORE:
131 case SSL_ST_ACCEPT:
132 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
133 case SSL_ST_OK|SSL_ST_ACCEPT:
134
135 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
136
137 /* s->version=SSL3_VERSION; */
138 s->type=SSL_ST_ACCEPT;
139
140 if (s->init_buf == NULL)
141 {
142 if ((buf=BUF_MEM_new()) == NULL)
143 {
144 ret= -1;
145 goto end;
146 }
147 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
148 {
149 ret= -1;
150 goto end;
151 }
152 s->init_buf=buf;
153 }
154
155 ssl3_init_finished_mac(s);
156
157 s->state=SSL23_ST_SR_CLNT_HELLO_A;
158 s->ctx->sess_accept++;
159 s->init_num=0;
160 break;
161
162 case SSL23_ST_SR_CLNT_HELLO_A:
163 case SSL23_ST_SR_CLNT_HELLO_B:
164
165 s->shutdown=0;
166 ret=ssl23_get_client_hello(s);
167 if (ret >= 0) cb=NULL;
168 goto end;
169 break;
170
171 default:
172 SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
173 ret= -1;
174 goto end;
175 /* break; */
176 }
177
178 if ((cb != NULL) && (s->state != state))
179 {
180 new_state=s->state;
181 s->state=state;
182 cb(s,SSL_CB_ACCEPT_LOOP,1);
183 s->state=new_state;
184 }
185 }
186end:
187 if (cb != NULL)
188 cb(s,SSL_CB_ACCEPT_EXIT,ret);
189 s->in_handshake--;
190 return(ret);
191 }
192
193
194int ssl23_get_client_hello(s)
195SSL *s;
196 {
197 char buf_space[8];
198 char *buf= &(buf_space[0]);
199 unsigned char *p,*d,*dd;
200 unsigned int i;
201 unsigned int csl,sil,cl;
202 int n=0,j,tls1=0;
203 int type=0,use_sslv2_strong=0;
204
205 /* read the initial header */
206 if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
207 {
208 if (!ssl3_setup_buffers(s)) goto err;
209
210 n=ssl23_read_bytes(s,7);
211 if (n != 7) return(n);
212
213 p=s->packet;
214
215 memcpy(buf,p,n);
216
217 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
218 {
219 /* SSLv2 header */
220 if ((p[3] == 0x00) && (p[4] == 0x02))
221 {
222 /* SSLv2 */
223 if (!(s->options & SSL_OP_NO_SSLv2))
224 type=1;
225 }
226 else if (p[3] == SSL3_VERSION_MAJOR)
227 {
228 /* SSLv3/TLSv1 */
229 if (p[4] >= TLS1_VERSION_MINOR)
230 {
231 if (!(s->options & SSL_OP_NO_TLSv1))
232 {
233 tls1=1;
234 s->state=SSL23_ST_SR_CLNT_HELLO_B;
235 }
236 else if (!(s->options & SSL_OP_NO_SSLv3))
237 {
238 s->state=SSL23_ST_SR_CLNT_HELLO_B;
239 }
240 }
241 else if (!(s->options & SSL_OP_NO_SSLv3))
242 s->state=SSL23_ST_SR_CLNT_HELLO_B;
243
244 if (s->options & SSL_OP_NON_EXPORT_FIRST)
245 {
246 STACK *sk;
247 SSL_CIPHER *c;
248 int ne2,ne3;
249
250 j=((p[0]&0x7f)<<8)|p[1];
251 if (j > (1024*4))
252 {
253 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
254 goto err;
255 }
256
257 n=ssl23_read_bytes(s,j+2);
258 if (n <= 0) return(n);
259 p=s->packet;
260
261 if ((buf=Malloc(n)) == NULL)
262 {
263 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
264 goto err;
265 }
266 memcpy(buf,p,n);
267
268 p+=5;
269 n2s(p,csl);
270 p+=4;
271
272 sk=ssl_bytes_to_cipher_list(
273 s,p,csl,NULL);
274 if (sk != NULL)
275 {
276 ne2=ne3=0;
277 for (j=0; j<sk_num(sk); j++)
278 {
279 c=(SSL_CIPHER *)sk_value(sk,j);
280 if (!(c->algorithms & SSL_EXP))
281 {
282 if ((c->id>>24L) == 2L)
283 ne2=1;
284 else
285 ne3=1;
286 }
287 }
288 if (ne2 && !ne3)
289 {
290 type=1;
291 use_sslv2_strong=1;
292 goto next_bit;
293 }
294 }
295 }
296 }
297 }
298 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
299 (p[1] == SSL3_VERSION_MAJOR) &&
300 (p[5] == SSL3_MT_CLIENT_HELLO))
301 {
302 /* true SSLv3 or tls1 */
303 if (p[2] >= TLS1_VERSION_MINOR)
304 {
305 if (!(s->options & SSL_OP_NO_TLSv1))
306 {
307 type=3;
308 tls1=1;
309 }
310 else if (!(s->options & SSL_OP_NO_SSLv3))
311 type=3;
312 }
313 else if (!(s->options & SSL_OP_NO_SSLv3))
314 type=3;
315 }
316 else if ((strncmp("GET ", p,4) == 0) ||
317 (strncmp("POST ",p,5) == 0) ||
318 (strncmp("HEAD ",p,5) == 0) ||
319 (strncmp("PUT ", p,4) == 0))
320 {
321 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
322 goto err;
323 }
324 else if (strncmp("CONNECT",p,7) == 0)
325 {
326 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
327 goto err;
328 }
329 }
330
331next_bit:
332 if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
333 {
334 /* we have a SSLv3/TLSv1 in a SSLv2 header */
335 type=2;
336 p=s->packet;
337 n=((p[0]&0x7f)<<8)|p[1];
338 if (n > (1024*4))
339 {
340 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
341 goto err;
342 }
343
344 j=ssl23_read_bytes(s,n+2);
345 if (j <= 0) return(j);
346
347 ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
348
349 p=s->packet;
350 p+=5;
351 n2s(p,csl);
352 n2s(p,sil);
353 n2s(p,cl);
354 d=(unsigned char *)s->init_buf->data;
355 if ((csl+sil+cl+11) != s->packet_length)
356 {
357 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
358 goto err;
359 }
360
361 *(d++)=SSL3_VERSION_MAJOR;
362 if (tls1)
363 *(d++)=TLS1_VERSION_MINOR;
364 else
365 *(d++)=SSL3_VERSION_MINOR;
366
367 /* lets populate the random area */
368 /* get the chalenge_length */
369 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
370 memset(d,0,SSL3_RANDOM_SIZE);
371 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
372 d+=SSL3_RANDOM_SIZE;
373
374 /* no session-id reuse */
375 *(d++)=0;
376
377 /* ciphers */
378 j=0;
379 dd=d;
380 d+=2;
381 for (i=0; i<csl; i+=3)
382 {
383 if (p[i] != 0) continue;
384 *(d++)=p[i+1];
385 *(d++)=p[i+2];
386 j+=2;
387 }
388 s2n(j,dd);
389
390 /* compression */
391 *(d++)=1;
392 *(d++)=0;
393
394 i=(d-(unsigned char *)s->init_buf->data);
395
396 /* get the data reused from the init_buf */
397 s->s3->tmp.reuse_message=1;
398 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
399 s->s3->tmp.message_size=i;
400 }
401
402 if (type == 1)
403 {
404 /* we are talking sslv2 */
405 /* we need to clean up the SSLv3/TLSv1 setup and put in the
406 * sslv2 stuff. */
407
408 if (s->s2 == NULL)
409 {
410 if (!ssl2_new(s))
411 goto err;
412 }
413 else
414 ssl2_clear(s);
415
416 if (s->s3 != NULL) ssl3_free(s);
417
418 if (!BUF_MEM_grow(s->init_buf,
419 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
420 {
421 goto err;
422 }
423
424 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
425 if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) ||
426 use_sslv2_strong)
427 s->s2->ssl2_rollback=0;
428 else
429 s->s2->ssl2_rollback=1;
430
431 /* setup the 5 bytes we have read so we get them from
432 * the sslv2 buffer */
433 s->rstate=SSL_ST_READ_HEADER;
434 s->packet_length=n;
435 s->packet= &(s->s2->rbuf[0]);
436 memcpy(s->packet,buf,n);
437 s->s2->rbuf_left=n;
438 s->s2->rbuf_offs=0;
439
440 s->method=SSLv2_server_method();
441 s->handshake_func=s->method->ssl_accept;
442 }
443
444 if ((type == 2) || (type == 3))
445 {
446 /* we have SSLv3/TLSv1 */
447
448 if (!ssl_init_wbio_buffer(s,1)) goto err;
449
450 /* we are in this state */
451 s->state=SSL3_ST_SR_CLNT_HELLO_A;
452
453 if (type == 3)
454 {
455 /* put the 'n' bytes we have read into the input buffer
456 * for SSLv3 */
457 s->rstate=SSL_ST_READ_HEADER;
458 s->packet_length=n;
459 s->packet= &(s->s3->rbuf.buf[0]);
460 memcpy(s->packet,buf,n);
461 s->s3->rbuf.left=n;
462 s->s3->rbuf.offset=0;
463 }
464 else
465 {
466 s->packet_length=0;
467 s->s3->rbuf.left=0;
468 s->s3->rbuf.offset=0;
469 }
470
471 if (tls1)
472 {
473 s->version=TLS1_VERSION;
474 s->method=TLSv1_server_method();
475 }
476 else
477 {
478 s->version=SSL3_VERSION;
479 s->method=SSLv3_server_method();
480 }
481 s->handshake_func=s->method->ssl_accept;
482 }
483
484 if ((type < 1) || (type > 3))
485 {
486 /* bad, very bad */
487 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
488 goto err;
489 }
490 s->init_num=0;
491
492 if (buf != buf_space) Free(buf);
493 s->first_packet=1;
494 return(SSL_accept(s));
495err:
496 if (buf != buf_space) Free(buf);
497 return(-1);
498 }
499
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