1 /* ssl/s2_lib.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 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112 #include "ssl_locl.h"
113 #ifndef OPENSSL_NO_SSL2
114 #include <stdio.h>
115 #include <openssl/objects.h>
116 #include <openssl/evp.h>
117 #include <openssl/md5.h>
118
119 const char ssl2_version_str[]="SSLv2" OPENSSL_VERSION_PTEXT;
120
121 #define SSL2_NUM_CIPHERS (sizeof(ssl2_ciphers)/sizeof(SSL_CIPHER))
122
123 /* list of available SSLv2 ciphers (sorted by id) */
124 OPENSSL_GLOBAL const SSL_CIPHER ssl2_ciphers[]={
125 #if 0
126 /* NULL_WITH_MD5 v3 */
127 {
128 1,
129 SSL2_TXT_NULL_WITH_MD5,
130 SSL2_CK_NULL_WITH_MD5,
131 SSL_kRSA,
132 SSL_aRSA,
133 SSL_eNULL,
134 SSL_MD5,
135 SSL_SSLV2,
136 SSL_EXPORT|SSL_EXP40|SSL_STRONG_NONE,
137 0,
138 0,
139 0,
140 },
141 #endif
142
143 /* RC4_128_WITH_MD5 */
144 {
145 1,
146 SSL2_TXT_RC4_128_WITH_MD5,
147 SSL2_CK_RC4_128_WITH_MD5,
148 SSL_kRSA,
149 SSL_aRSA,
150 SSL_RC4,
151 SSL_MD5,
152 SSL_SSLV2,
153 SSL_NOT_EXP|SSL_MEDIUM,
154 0,
155 128,
156 128,
157 },
158
159 /* RC4_128_EXPORT40_WITH_MD5 */
160 {
161 1,
162 SSL2_TXT_RC4_128_EXPORT40_WITH_MD5,
163 SSL2_CK_RC4_128_EXPORT40_WITH_MD5,
164 SSL_kRSA,
165 SSL_aRSA,
166 SSL_RC4,
167 SSL_MD5,
168 SSL_SSLV2,
169 SSL_EXPORT|SSL_EXP40,
170 SSL2_CF_5_BYTE_ENC,
171 40,
172 128,
173 },
174
175 /* RC2_128_CBC_WITH_MD5 */
176 {
177 1,
178 SSL2_TXT_RC2_128_CBC_WITH_MD5,
179 SSL2_CK_RC2_128_CBC_WITH_MD5,
180 SSL_kRSA,
181 SSL_aRSA,
182 SSL_RC2,
183 SSL_MD5,
184 SSL_SSLV2,
185 SSL_NOT_EXP|SSL_MEDIUM,
186 0,
187 128,
188 128,
189 },
190
191 /* RC2_128_CBC_EXPORT40_WITH_MD5 */
192 {
193 1,
194 SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5,
195 SSL2_CK_RC2_128_CBC_EXPORT40_WITH_MD5,
196 SSL_kRSA,
197 SSL_aRSA,
198 SSL_RC2,
199 SSL_MD5,
200 SSL_SSLV2,
201 SSL_EXPORT|SSL_EXP40,
202 SSL2_CF_5_BYTE_ENC,
203 40,
204 128,
205 },
206
207 #ifndef OPENSSL_NO_IDEA
208 /* IDEA_128_CBC_WITH_MD5 */
209 {
210 1,
211 SSL2_TXT_IDEA_128_CBC_WITH_MD5,
212 SSL2_CK_IDEA_128_CBC_WITH_MD5,
213 SSL_kRSA,
214 SSL_aRSA,
215 SSL_IDEA,
216 SSL_MD5,
217 SSL_SSLV2,
218 SSL_NOT_EXP|SSL_MEDIUM,
219 0,
220 128,
221 128,
222 },
223 #endif
224
225 /* DES_64_CBC_WITH_MD5 */
226 {
227 1,
228 SSL2_TXT_DES_64_CBC_WITH_MD5,
229 SSL2_CK_DES_64_CBC_WITH_MD5,
230 SSL_kRSA,
231 SSL_aRSA,
232 SSL_DES,
233 SSL_MD5,
234 SSL_SSLV2,
235 SSL_NOT_EXP|SSL_LOW,
236 0,
237 56,
238 56,
239 },
240
241 /* DES_192_EDE3_CBC_WITH_MD5 */
242 {
243 1,
244 SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5,
245 SSL2_CK_DES_192_EDE3_CBC_WITH_MD5,
246 SSL_kRSA,
247 SSL_aRSA,
248 SSL_3DES,
249 SSL_MD5,
250 SSL_SSLV2,
251 SSL_NOT_EXP|SSL_HIGH,
252 0,
253 112,
254 168,
255 },
256
257 #if 0
258 /* RC4_64_WITH_MD5 */
259 {
260 1,
261 SSL2_TXT_RC4_64_WITH_MD5,
262 SSL2_CK_RC4_64_WITH_MD5,
263 SSL_kRSA,
264 SSL_aRSA,
265 SSL_RC4,
266 SSL_MD5,
267 SSL_SSLV2,
268 SSL_NOT_EXP|SSL_LOW,
269 SSL2_CF_8_BYTE_ENC,
270 64,
271 64,
272 },
273 #endif
274
275 #if 0
276 /* NULL SSLeay (testing) */
277 {
278 0,
279 SSL2_TXT_NULL,
280 SSL2_CK_NULL,
281 0,
282 0,
283 0,
284 0,
285 SSL_SSLV2,
286 SSL_STRONG_NONE,
287 0,
288 0,
289 0,
290 },
291 #endif
292
293 /* end of list :-) */
294 };
295
296 long ssl2_default_timeout(void)
297 {
298 return(300);
299 }
300
301 int ssl2_num_ciphers(void)
302 {
303 return(SSL2_NUM_CIPHERS);
304 }
305
306 const SSL_CIPHER *ssl2_get_cipher(unsigned int u)
307 {
308 if (u < SSL2_NUM_CIPHERS)
309 return(&(ssl2_ciphers[SSL2_NUM_CIPHERS-1-u]));
310 else
311 return(NULL);
312 }
313
314 int ssl2_pending(const SSL *s)
315 {
316 return SSL_in_init(s) ? 0 : s->s2->ract_data_length;
317 }
318
319 int ssl2_new(SSL *s)
320 {
321 SSL2_STATE *s2;
322
323 if ((s2=OPENSSL_malloc(sizeof *s2)) == NULL) goto err;
324 memset(s2,0,sizeof *s2);
325
326 #if SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER + 3 > SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER + 2
327 # error "assertion failed"
328 #endif
329
330 if ((s2->rbuf=OPENSSL_malloc(
331 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+2)) == NULL) goto err;
332 /* wbuf needs one byte more because when using two-byte headers,
333 * we leave the first byte unused in do_ssl_write (s2_pkt.c) */
334 if ((s2->wbuf=OPENSSL_malloc(
335 SSL2_MAX_RECORD_LENGTH_2_BYTE_HEADER+3)) == NULL) goto err;
336 s->s2=s2;
337
338 ssl2_clear(s);
339 return(1);
340 err:
341 if (s2 != NULL)
342 {
343 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
344 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
345 OPENSSL_free(s2);
346 }
347 return(0);
348 }
349
350 void ssl2_free(SSL *s)
351 {
352 SSL2_STATE *s2;
353
354 if(s == NULL)
355 return;
356
357 s2=s->s2;
358 if (s2->rbuf != NULL) OPENSSL_free(s2->rbuf);
359 if (s2->wbuf != NULL) OPENSSL_free(s2->wbuf);
360 OPENSSL_cleanse(s2,sizeof *s2);
361 OPENSSL_free(s2);
362 s->s2=NULL;
363 }
364
365 void ssl2_clear(SSL *s)
366 {
367 SSL2_STATE *s2;
368 unsigned char *rbuf,*wbuf;
369
370 s2=s->s2;
371
372 rbuf=s2->rbuf;
373 wbuf=s2->wbuf;
374
375 memset(s2,0,sizeof *s2);
376
377 s2->rbuf=rbuf;
378 s2->wbuf=wbuf;
379 s2->clear_text=1;
380 s->packet=s2->rbuf;
381 s->version=SSL2_VERSION;
382 s->packet_length=0;
383 }
384
385 long ssl2_ctrl(SSL *s, int cmd, long larg, void *parg)
386 {
387 int ret=0;
388
389 switch(cmd)
390 {
391 case SSL_CTRL_GET_SESSION_REUSED:
392 ret=s->hit;
393 break;
394 default:
395 break;
396 }
397 return(ret);
398 }
399
400 long ssl2_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
401 {
402 return(0);
403 }
404
405 long ssl2_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
406 {
407 return(0);
408 }
409
410 long ssl2_ctx_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
411 {
412 return(0);
413 }
414
415 /* This function needs to check if the ciphers required are actually
416 * available */
417 const SSL_CIPHER *ssl2_get_cipher_by_char(const unsigned char *p)
418 {
419 SSL_CIPHER c;
420 const SSL_CIPHER *cp;
421 unsigned long id;
422
423 id=0x02000000L|((unsigned long)p[0]<<16L)|
424 ((unsigned long)p[1]<<8L)|(unsigned long)p[2];
425 c.id=id;
426 cp = OBJ_bsearch_ssl_cipher_id(&c, ssl2_ciphers, SSL2_NUM_CIPHERS);
427 if ((cp == NULL) || (cp->valid == 0))
428 return NULL;
429 else
430 return cp;
431 }
432
433 int ssl2_put_cipher_by_char(const SSL_CIPHER *c, unsigned char *p)
434 {
435 long l;
436
437 if (p != NULL)
438 {
439 l=c->id;
440 if ((l & 0xff000000) != 0x02000000) return(0);
441 p[0]=((unsigned char)(l>>16L))&0xFF;
442 p[1]=((unsigned char)(l>> 8L))&0xFF;
443 p[2]=((unsigned char)(l ))&0xFF;
444 }
445 return(3);
446 }
447
448 int ssl2_generate_key_material(SSL *s)
449 {
450 unsigned int i;
451 EVP_MD_CTX ctx;
452 unsigned char *km;
453 unsigned char c='0';
454 const EVP_MD *md5;
455 int md_size;
456
457 md5 = EVP_md5();
458
459 #ifdef CHARSET_EBCDIC
460 c = os_toascii['0']; /* Must be an ASCII '0', not EBCDIC '0',
461 see SSLv2 docu */
462 #endif
463 EVP_MD_CTX_init(&ctx);
464 km=s->s2->key_material;
465
466 if (s->session->master_key_length < 0 ||
467 s->session->master_key_length > (int)sizeof(s->session->master_key))
468 {
469 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
470 return 0;
471 }
472 md_size = EVP_MD_size(md5);
473 if (md_size < 0)
474 return 0;
475 for (i=0; i<s->s2->key_material_length; i += md_size)
476 {
477 if (((km - s->s2->key_material) + md_size) >
478 (int)sizeof(s->s2->key_material))
479 {
480 /* EVP_DigestFinal_ex() below would write beyond buffer */
481 SSLerr(SSL_F_SSL2_GENERATE_KEY_MATERIAL, ERR_R_INTERNAL_ERROR);
482 return 0;
483 }
484
485 EVP_DigestInit_ex(&ctx, md5, NULL);
486
487 OPENSSL_assert(s->session->master_key_length >= 0
488 && s->session->master_key_length
489 < (int)sizeof(s->session->master_key));
490 EVP_DigestUpdate(&ctx,s->session->master_key,s->session->master_key_length);
491 EVP_DigestUpdate(&ctx,&c,1);
492 c++;
493 EVP_DigestUpdate(&ctx,s->s2->challenge,s->s2->challenge_length);
494 EVP_DigestUpdate(&ctx,s->s2->conn_id,s->s2->conn_id_length);
495 EVP_DigestFinal_ex(&ctx,km,NULL);
496 km += md_size;
497 }
498
499 EVP_MD_CTX_cleanup(&ctx);
500 return 1;
501 }
502
503 void ssl2_return_error(SSL *s, int err)
504 {
505 if (!s->error)
506 {
507 s->error=3;
508 s->error_code=err;
509
510 ssl2_write_error(s);
511 }
512 }
513
514
515 void ssl2_write_error(SSL *s)
516 {
517 unsigned char buf[3];
518 int i,error;
519
520 buf[0]=SSL2_MT_ERROR;
521 buf[1]=(s->error_code>>8)&0xff;
522 buf[2]=(s->error_code)&0xff;
523
524 /* state=s->rwstate;*/
525
526 error=s->error; /* number of bytes left to write */
527 s->error=0;
528 OPENSSL_assert(error >= 0 && error <= (int)sizeof(buf));
529 i=ssl2_write(s,&(buf[3-error]),error);
530
531 /* if (i == error) s->rwstate=state; */
532
533 if (i < 0)
534 s->error=error;
535 else
536 {
537 s->error=error-i;
538
539 if (s->error == 0)
540 if (s->msg_callback)
541 s->msg_callback(1, s->version, 0, buf, 3, s, s->msg_callback_arg); /* ERROR */
542 }
543 }
544
545 int ssl2_shutdown(SSL *s)
546 {
547 s->shutdown=(SSL_SENT_SHUTDOWN|SSL_RECEIVED_SHUTDOWN);
548 return(1);
549 }
550 #else /* !OPENSSL_NO_SSL2 */
551
552 # if PEDANTIC
553 static void *dummy=&dummy;
554 # endif
555
556 #endif