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-rw-r--r--src/lib/libssl/s23_srvr.c576
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diff --git a/src/lib/libssl/s23_srvr.c b/src/lib/libssl/s23_srvr.c
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index 050618235f..0000000000
--- a/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 <openssl/buffer.h>
61#include <openssl/rand.h>
62#include <openssl/objects.h>
63#include <openssl/evp.h>
64#include "ssl_locl.h"
65
66static SSL_METHOD *ssl23_get_server_method(int ver);
67int ssl23_get_client_hello(SSL *s);
68static SSL_METHOD *ssl23_get_server_method(int ver)
69 {
70#ifndef NO_SSL2
71 if (ver == SSL2_VERSION)
72 return(SSLv2_server_method());
73#endif
74 if (ver == SSL3_VERSION)
75 return(SSLv3_server_method());
76 else if (ver == TLS1_VERSION)
77 return(TLSv1_server_method());
78 else
79 return(NULL);
80 }
81
82SSL_METHOD *SSLv23_server_method(void)
83 {
84 static int init=1;
85 static SSL_METHOD SSLv23_server_data;
86
87 if (init)
88 {
89 memcpy((char *)&SSLv23_server_data,
90 (char *)sslv23_base_method(),sizeof(SSL_METHOD));
91 SSLv23_server_data.ssl_accept=ssl23_accept;
92 SSLv23_server_data.get_ssl_method=ssl23_get_server_method;
93 init=0;
94 }
95 return(&SSLv23_server_data);
96 }
97
98int ssl23_accept(SSL *s)
99 {
100 BUF_MEM *buf;
101 unsigned long Time=time(NULL);
102 void (*cb)()=NULL;
103 int ret= -1;
104 int new_state,state;
105
106 RAND_add(&Time,sizeof(Time),0);
107 ERR_clear_error();
108 clear_sys_error();
109
110 if (s->info_callback != NULL)
111 cb=s->info_callback;
112 else if (s->ctx->info_callback != NULL)
113 cb=s->ctx->info_callback;
114
115 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
116 s->in_handshake++;
117
118 for (;;)
119 {
120 state=s->state;
121
122 switch(s->state)
123 {
124 case SSL_ST_BEFORE:
125 case SSL_ST_ACCEPT:
126 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
127 case SSL_ST_OK|SSL_ST_ACCEPT:
128
129 s->server=1;
130 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
131
132 /* s->version=SSL3_VERSION; */
133 s->type=SSL_ST_ACCEPT;
134
135 if (s->init_buf == NULL)
136 {
137 if ((buf=BUF_MEM_new()) == NULL)
138 {
139 ret= -1;
140 goto end;
141 }
142 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
143 {
144 ret= -1;
145 goto end;
146 }
147 s->init_buf=buf;
148 }
149
150 ssl3_init_finished_mac(s);
151
152 s->state=SSL23_ST_SR_CLNT_HELLO_A;
153 s->ctx->stats.sess_accept++;
154 s->init_num=0;
155 break;
156
157 case SSL23_ST_SR_CLNT_HELLO_A:
158 case SSL23_ST_SR_CLNT_HELLO_B:
159
160 s->shutdown=0;
161 ret=ssl23_get_client_hello(s);
162 if (ret >= 0) cb=NULL;
163 goto end;
164 /* break; */
165
166 default:
167 SSLerr(SSL_F_SSL23_ACCEPT,SSL_R_UNKNOWN_STATE);
168 ret= -1;
169 goto end;
170 /* break; */
171 }
172
173 if ((cb != NULL) && (s->state != state))
174 {
175 new_state=s->state;
176 s->state=state;
177 cb(s,SSL_CB_ACCEPT_LOOP,1);
178 s->state=new_state;
179 }
180 }
181end:
182 if (cb != NULL)
183 cb(s,SSL_CB_ACCEPT_EXIT,ret);
184 s->in_handshake--;
185 return(ret);
186 }
187
188
189int ssl23_get_client_hello(SSL *s)
190 {
191 char buf_space[11]; /* Request this many bytes in initial read.
192 * We can detect SSL 3.0/TLS 1.0 Client Hellos
193 * ('type == 3') correctly only when the following
194 * is in a single record, which is not guaranteed by
195 * the protocol specification:
196 * Byte Content
197 * 0 type \
198 * 1/2 version > record header
199 * 3/4 length /
200 * 5 msg_type \
201 * 6-8 length > Client Hello message
202 * 9/10 client_version /
203 */
204 char *buf= &(buf_space[0]);
205 unsigned char *p,*d,*dd;
206 unsigned int i;
207 unsigned int csl,sil,cl;
208 int n=0,j;
209 int type=0;
210 int v[2];
211#ifndef NO_RSA
212 int use_sslv2_strong=0;
213#endif
214
215 if (s->state == SSL23_ST_SR_CLNT_HELLO_A)
216 {
217 /* read the initial header */
218 v[0]=v[1]=0;
219
220 if (!ssl3_setup_buffers(s)) goto err;
221
222 n=ssl23_read_bytes(s, sizeof buf_space);
223 if (n != sizeof buf_space) return(n); /* n == -1 || n == 0 */
224
225 p=s->packet;
226
227 memcpy(buf,p,n);
228
229 if ((p[0] & 0x80) && (p[2] == SSL2_MT_CLIENT_HELLO))
230 {
231 /*
232 * SSLv2 header
233 */
234 if ((p[3] == 0x00) && (p[4] == 0x02))
235 {
236 v[0]=p[3]; v[1]=p[4];
237 /* SSLv2 */
238 if (!(s->options & SSL_OP_NO_SSLv2))
239 type=1;
240 }
241 else if (p[3] == SSL3_VERSION_MAJOR)
242 {
243 v[0]=p[3]; v[1]=p[4];
244 /* SSLv3/TLSv1 */
245 if (p[4] >= TLS1_VERSION_MINOR)
246 {
247 if (!(s->options & SSL_OP_NO_TLSv1))
248 {
249 s->version=TLS1_VERSION;
250 /* type=2; */ /* done later to survive restarts */
251 s->state=SSL23_ST_SR_CLNT_HELLO_B;
252 }
253 else if (!(s->options & SSL_OP_NO_SSLv3))
254 {
255 s->version=SSL3_VERSION;
256 /* type=2; */
257 s->state=SSL23_ST_SR_CLNT_HELLO_B;
258 }
259 else if (!(s->options & SSL_OP_NO_SSLv2))
260 {
261 type=1;
262 }
263 }
264 else if (!(s->options & SSL_OP_NO_SSLv3))
265 {
266 s->version=SSL3_VERSION;
267 /* type=2; */
268 s->state=SSL23_ST_SR_CLNT_HELLO_B;
269 }
270 else if (!(s->options & SSL_OP_NO_SSLv2))
271 type=1;
272
273 if (s->options & SSL_OP_NON_EXPORT_FIRST)
274 /* Not only utterly confusing, but broken
275 * ('fractured programming'?) -- the details
276 * of this block nearly make it work
277 * as intended in this environment, but on one
278 * of the fine points (w.r.t. restarts) it fails.
279 * The obvious fix would be even more devastating
280 * to program structure; if you want the functionality,
281 * throw this away and implement it in a way
282 * that makes sense */
283 {
284#if 0
285 STACK_OF(SSL_CIPHER) *sk;
286 SSL_CIPHER *c;
287 int ne2,ne3;
288
289 j=((p[0]&0x7f)<<8)|p[1];
290 if (j > (1024*4))
291 {
292 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
293 goto err;
294 }
295
296 n=ssl23_read_bytes(s,j+2);
297 if (n <= 0) return(n);
298 p=s->packet;
299
300 if ((buf=OPENSSL_malloc(n)) == NULL)
301 {
302 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
303 goto err;
304 }
305 memcpy(buf,p,n);
306
307 p+=5;
308 n2s(p,csl);
309 p+=4;
310
311 sk=ssl_bytes_to_cipher_list(
312 s,p,csl,NULL);
313 if (sk != NULL)
314 {
315 ne2=ne3=0;
316 for (j=0; j<sk_SSL_CIPHER_num(sk); j++)
317 {
318 c=sk_SSL_CIPHER_value(sk,j);
319 if (!SSL_C_IS_EXPORT(c))
320 {
321 if ((c->id>>24L) == 2L)
322 ne2=1;
323 else
324 ne3=1;
325 }
326 }
327 if (ne2 && !ne3)
328 {
329 type=1;
330 use_sslv2_strong=1;
331 goto next_bit;
332 }
333 }
334#else
335 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_OPTION);
336 goto err;
337#endif
338 }
339 }
340 }
341 else if ((p[0] == SSL3_RT_HANDSHAKE) &&
342 (p[1] == SSL3_VERSION_MAJOR) &&
343 (p[5] == SSL3_MT_CLIENT_HELLO) &&
344 ((p[3] == 0 && p[4] < 5 /* silly record length? */)
345 || (p[9] == p[1])))
346 {
347 /*
348 * SSLv3 or tls1 header
349 */
350
351 v[0]=p[1]; /* major version (= SSL3_VERSION_MAJOR) */
352 /* We must look at client_version inside the Client Hello message
353 * to get the correct minor version.
354 * However if we have only a pathologically small fragment of the
355 * Client Hello message, this would be difficult, we'd have
356 * to read at least one additional record to find out.
357 * This doesn't usually happen in real life, so we just complain
358 * for now.
359 */
360 if (p[3] == 0 && p[4] < 6)
361 {
362 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_SMALL);
363 goto err;
364 }
365 v[1]=p[10]; /* minor version according to client_version */
366 if (v[1] >= TLS1_VERSION_MINOR)
367 {
368 if (!(s->options & SSL_OP_NO_TLSv1))
369 {
370 s->version=TLS1_VERSION;
371 type=3;
372 }
373 else if (!(s->options & SSL_OP_NO_SSLv3))
374 {
375 s->version=SSL3_VERSION;
376 type=3;
377 }
378 }
379 else if (!(s->options & SSL_OP_NO_SSLv3))
380 {
381 s->version=SSL3_VERSION;
382 type=3;
383 }
384 }
385 else if ((strncmp("GET ", (char *)p,4) == 0) ||
386 (strncmp("POST ",(char *)p,5) == 0) ||
387 (strncmp("HEAD ",(char *)p,5) == 0) ||
388 (strncmp("PUT ", (char *)p,4) == 0))
389 {
390 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTP_REQUEST);
391 goto err;
392 }
393 else if (strncmp("CONNECT",(char *)p,7) == 0)
394 {
395 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_HTTPS_PROXY_REQUEST);
396 goto err;
397 }
398 }
399
400 if (s->state == SSL23_ST_SR_CLNT_HELLO_B)
401 {
402 /* we have SSLv3/TLSv1 in an SSLv2 header
403 * (other cases skip this state) */
404
405 type=2;
406 p=s->packet;
407 v[0] = p[3]; /* == SSL3_VERSION_MAJOR */
408 v[1] = p[4];
409
410 n=((p[0]&0x7f)<<8)|p[1];
411 if (n > (1024*4))
412 {
413 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_TOO_LARGE);
414 goto err;
415 }
416
417 j=ssl23_read_bytes(s,n+2);
418 if (j <= 0) return(j);
419
420 ssl3_finish_mac(s,&(s->packet[2]),s->packet_length-2);
421
422 p=s->packet;
423 p+=5;
424 n2s(p,csl);
425 n2s(p,sil);
426 n2s(p,cl);
427 d=(unsigned char *)s->init_buf->data;
428 if ((csl+sil+cl+11) != s->packet_length)
429 {
430 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_RECORD_LENGTH_MISMATCH);
431 goto err;
432 }
433
434 *(d++) = SSL3_VERSION_MAJOR; /* == v[0] */
435 *(d++) = v[1];
436
437 /* lets populate the random area */
438 /* get the challenge_length */
439 i=(cl > SSL3_RANDOM_SIZE)?SSL3_RANDOM_SIZE:cl;
440 memset(d,0,SSL3_RANDOM_SIZE);
441 memcpy(&(d[SSL3_RANDOM_SIZE-i]),&(p[csl+sil]),i);
442 d+=SSL3_RANDOM_SIZE;
443
444 /* no session-id reuse */
445 *(d++)=0;
446
447 /* ciphers */
448 j=0;
449 dd=d;
450 d+=2;
451 for (i=0; i<csl; i+=3)
452 {
453 if (p[i] != 0) continue;
454 *(d++)=p[i+1];
455 *(d++)=p[i+2];
456 j+=2;
457 }
458 s2n(j,dd);
459
460 /* COMPRESSION */
461 *(d++)=1;
462 *(d++)=0;
463
464 i=(d-(unsigned char *)s->init_buf->data);
465
466 /* get the data reused from the init_buf */
467 s->s3->tmp.reuse_message=1;
468 s->s3->tmp.message_type=SSL3_MT_CLIENT_HELLO;
469 s->s3->tmp.message_size=i;
470 }
471
472 /* imaginary new state (for program structure): */
473 /* s->state = SSL23_SR_CLNT_HELLO_C */
474
475 if (type == 1)
476 {
477#ifdef NO_SSL2
478 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
479 goto err;
480#else
481 /* we are talking sslv2 */
482 /* we need to clean up the SSLv3/TLSv1 setup and put in the
483 * sslv2 stuff. */
484
485 if (s->s2 == NULL)
486 {
487 if (!ssl2_new(s))
488 goto err;
489 }
490 else
491 ssl2_clear(s);
492
493 if (s->s3 != NULL) ssl3_free(s);
494
495 if (!BUF_MEM_grow(s->init_buf,
496 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
497 {
498 goto err;
499 }
500
501 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
502 if ((s->options & SSL_OP_MSIE_SSLV2_RSA_PADDING) ||
503 use_sslv2_strong ||
504 (s->options & SSL_OP_NO_TLSv1 && s->options & SSL_OP_NO_SSLv3))
505 s->s2->ssl2_rollback=0;
506 else
507 /* reject SSL 2.0 session if client supports SSL 3.0 or TLS 1.0
508 * (SSL 3.0 draft/RFC 2246, App. E.2) */
509 s->s2->ssl2_rollback=1;
510
511 /* setup the n bytes we have read so we get them from
512 * the sslv2 buffer */
513 s->rstate=SSL_ST_READ_HEADER;
514 s->packet_length=n;
515 s->packet= &(s->s2->rbuf[0]);
516 memcpy(s->packet,buf,n);
517 s->s2->rbuf_left=n;
518 s->s2->rbuf_offs=0;
519
520 s->method=SSLv2_server_method();
521 s->handshake_func=s->method->ssl_accept;
522#endif
523 }
524
525 if ((type == 2) || (type == 3))
526 {
527 /* we have SSLv3/TLSv1 (type 2: SSL2 style, type 3: SSL3/TLS style) */
528
529 if (!ssl_init_wbio_buffer(s,1)) goto err;
530
531 /* we are in this state */
532 s->state=SSL3_ST_SR_CLNT_HELLO_A;
533
534 if (type == 3)
535 {
536 /* put the 'n' bytes we have read into the input buffer
537 * for SSLv3 */
538 s->rstate=SSL_ST_READ_HEADER;
539 s->packet_length=n;
540 s->packet= &(s->s3->rbuf.buf[0]);
541 memcpy(s->packet,buf,n);
542 s->s3->rbuf.left=n;
543 s->s3->rbuf.offset=0;
544 }
545 else
546 {
547 s->packet_length=0;
548 s->s3->rbuf.left=0;
549 s->s3->rbuf.offset=0;
550 }
551
552 if (s->version == TLS1_VERSION)
553 s->method = TLSv1_server_method();
554 else
555 s->method = SSLv3_server_method();
556#if 0 /* ssl3_get_client_hello does this */
557 s->client_version=(v[0]<<8)|v[1];
558#endif
559 s->handshake_func=s->method->ssl_accept;
560 }
561
562 if ((type < 1) || (type > 3))
563 {
564 /* bad, very bad */
565 SSLerr(SSL_F_SSL23_GET_CLIENT_HELLO,SSL_R_UNKNOWN_PROTOCOL);
566 goto err;
567 }
568 s->init_num=0;
569
570 if (buf != buf_space) OPENSSL_free(buf);
571 s->first_packet=1;
572 return(SSL_accept(s));
573err:
574 if (buf != buf_space) OPENSSL_free(buf);
575 return(-1);
576 }
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