xref: /freebsd/crypto/openssl/ssl/t1_enc.c (revision 3b8f08459569bf0faa21473e5cec2491e95c9349)
1 /* ssl/t1_enc.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  * Copyright 2005 Nokia. All rights reserved.
113  *
114  * The portions of the attached software ("Contribution") is developed by
115  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
116  * license.
117  *
118  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
119  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
120  * support (see RFC 4279) to OpenSSL.
121  *
122  * No patent licenses or other rights except those expressly stated in
123  * the OpenSSL open source license shall be deemed granted or received
124  * expressly, by implication, estoppel, or otherwise.
125  *
126  * No assurances are provided by Nokia that the Contribution does not
127  * infringe the patent or other intellectual property rights of any third
128  * party or that the license provides you with all the necessary rights
129  * to make use of the Contribution.
130  *
131  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
132  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
133  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
134  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
135  * OTHERWISE.
136  */
137 
138 #include <stdio.h>
139 #include "ssl_locl.h"
140 #ifndef OPENSSL_NO_COMP
141 #include <openssl/comp.h>
142 #endif
143 #include <openssl/evp.h>
144 #include <openssl/hmac.h>
145 #include <openssl/md5.h>
146 #include <openssl/rand.h>
147 #ifdef KSSL_DEBUG
148 #include <openssl/des.h>
149 #endif
150 
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
153 			int sec_len,
154 			const void *seed1, int seed1_len,
155 			const void *seed2, int seed2_len,
156 			const void *seed3, int seed3_len,
157 			const void *seed4, int seed4_len,
158 			const void *seed5, int seed5_len,
159 			unsigned char *out, int olen)
160 	{
161 	int chunk;
162 	size_t j;
163 	EVP_MD_CTX ctx, ctx_tmp;
164 	EVP_PKEY *mac_key;
165 	unsigned char A1[EVP_MAX_MD_SIZE];
166 	size_t A1_len;
167 	int ret = 0;
168 
169 	chunk=EVP_MD_size(md);
170 	OPENSSL_assert(chunk >= 0);
171 
172 	EVP_MD_CTX_init(&ctx);
173 	EVP_MD_CTX_init(&ctx_tmp);
174 	EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
175 	EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176 	mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
177 	if (!mac_key)
178 		goto err;
179 	if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
180 		goto err;
181 	if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
182 		goto err;
183 	if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
184 		goto err;
185 	if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
186 		goto err;
187 	if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
188 		goto err;
189 	if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
190 		goto err;
191 	if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
192 		goto err;
193 	if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
194 		goto err;
195 
196 	for (;;)
197 		{
198 		/* Reinit mac contexts */
199 		if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
200 			goto err;
201 		if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
202 			goto err;
203 		if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
204 			goto err;
205 		if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
206 			goto err;
207 		if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
208 			goto err;
209 		if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
210 			goto err;
211 		if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
212 			goto err;
213 		if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
214 			goto err;
215 		if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
216 			goto err;
217 
218 		if (olen > chunk)
219 			{
220 			if (!EVP_DigestSignFinal(&ctx,out,&j))
221 				goto err;
222 			out+=j;
223 			olen-=j;
224 			/* calc the next A1 value */
225 			if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
226 				goto err;
227 			}
228 		else	/* last one */
229 			{
230 			if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
231 				goto err;
232 			memcpy(out,A1,olen);
233 			break;
234 			}
235 		}
236 	ret = 1;
237 err:
238 	EVP_PKEY_free(mac_key);
239 	EVP_MD_CTX_cleanup(&ctx);
240 	EVP_MD_CTX_cleanup(&ctx_tmp);
241 	OPENSSL_cleanse(A1,sizeof(A1));
242 	return ret;
243 	}
244 
245 /* seed1 through seed5 are virtually concatenated */
246 static int tls1_PRF(long digest_mask,
247 		     const void *seed1, int seed1_len,
248 		     const void *seed2, int seed2_len,
249 		     const void *seed3, int seed3_len,
250 		     const void *seed4, int seed4_len,
251 		     const void *seed5, int seed5_len,
252 		     const unsigned char *sec, int slen,
253 		     unsigned char *out1,
254 		     unsigned char *out2, int olen)
255 	{
256 	int len,i,idx,count;
257 	const unsigned char *S1;
258 	long m;
259 	const EVP_MD *md;
260 	int ret = 0;
261 
262 	/* Count number of digests and partition sec evenly */
263 	count=0;
264 	for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
265 		if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
266 	}
267 	len=slen/count;
268 	if (count == 1)
269 		slen = 0;
270 	S1=sec;
271 	memset(out1,0,olen);
272 	for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
273 		if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
274 			if (!md) {
275 				SSLerr(SSL_F_TLS1_PRF,
276 				SSL_R_UNSUPPORTED_DIGEST_TYPE);
277 				goto err;
278 			}
279 			if (!tls1_P_hash(md ,S1,len+(slen&1),
280 					seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
281 					out2,olen))
282 				goto err;
283 			S1+=len;
284 			for (i=0; i<olen; i++)
285 			{
286 				out1[i]^=out2[i];
287 			}
288 		}
289 	}
290 	ret = 1;
291 err:
292 	return ret;
293 }
294 static int tls1_generate_key_block(SSL *s, unsigned char *km,
295 	     unsigned char *tmp, int num)
296 	{
297 	int ret;
298 	ret = tls1_PRF(ssl_get_algorithm2(s),
299 		 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
300 		 s->s3->server_random,SSL3_RANDOM_SIZE,
301 		 s->s3->client_random,SSL3_RANDOM_SIZE,
302 		 NULL,0,NULL,0,
303 		 s->session->master_key,s->session->master_key_length,
304 		 km,tmp,num);
305 #ifdef KSSL_DEBUG
306 	printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
307                 s->session->master_key_length);
308 	{
309         int i;
310         for (i=0; i < s->session->master_key_length; i++)
311                 {
312                 printf("%02X", s->session->master_key[i]);
313                 }
314         printf("\n");  }
315 #endif    /* KSSL_DEBUG */
316 	return ret;
317 	}
318 
319 int tls1_change_cipher_state(SSL *s, int which)
320 	{
321 	static const unsigned char empty[]="";
322 	unsigned char *p,*mac_secret;
323 	unsigned char *exp_label;
324 	unsigned char tmp1[EVP_MAX_KEY_LENGTH];
325 	unsigned char tmp2[EVP_MAX_KEY_LENGTH];
326 	unsigned char iv1[EVP_MAX_IV_LENGTH*2];
327 	unsigned char iv2[EVP_MAX_IV_LENGTH*2];
328 	unsigned char *ms,*key,*iv;
329 	int client_write;
330 	EVP_CIPHER_CTX *dd;
331 	const EVP_CIPHER *c;
332 #ifndef OPENSSL_NO_COMP
333 	const SSL_COMP *comp;
334 #endif
335 	const EVP_MD *m;
336 	int mac_type;
337 	int *mac_secret_size;
338 	EVP_MD_CTX *mac_ctx;
339 	EVP_PKEY *mac_key;
340 	int is_export,n,i,j,k,exp_label_len,cl;
341 	int reuse_dd = 0;
342 
343 	is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
344 	c=s->s3->tmp.new_sym_enc;
345 	m=s->s3->tmp.new_hash;
346 	mac_type = s->s3->tmp.new_mac_pkey_type;
347 #ifndef OPENSSL_NO_COMP
348 	comp=s->s3->tmp.new_compression;
349 #endif
350 
351 #ifdef KSSL_DEBUG
352 	printf("tls1_change_cipher_state(which= %d) w/\n", which);
353 	printf("\talg= %ld/%ld, comp= %p\n",
354 	       s->s3->tmp.new_cipher->algorithm_mkey,
355 	       s->s3->tmp.new_cipher->algorithm_auth,
356 	       comp);
357 	printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
358 	printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
359                 c->nid,c->block_size,c->key_len,c->iv_len);
360 	printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
361 	{
362         int i;
363         for (i=0; i<s->s3->tmp.key_block_length; i++)
364 		printf("%02x", s->s3->tmp.key_block[i]);  printf("\n");
365         }
366 #endif	/* KSSL_DEBUG */
367 
368 	if (which & SSL3_CC_READ)
369 		{
370 		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
371 			s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
372 		else
373 			s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
374 
375 		if (s->enc_read_ctx != NULL)
376 			reuse_dd = 1;
377 		else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
378 			goto err;
379 		else
380 			/* make sure it's intialized in case we exit later with an error */
381 			EVP_CIPHER_CTX_init(s->enc_read_ctx);
382 		dd= s->enc_read_ctx;
383 		mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
384 #ifndef OPENSSL_NO_COMP
385 		if (s->expand != NULL)
386 			{
387 			COMP_CTX_free(s->expand);
388 			s->expand=NULL;
389 			}
390 		if (comp != NULL)
391 			{
392 			s->expand=COMP_CTX_new(comp->method);
393 			if (s->expand == NULL)
394 				{
395 				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
396 				goto err2;
397 				}
398 			if (s->s3->rrec.comp == NULL)
399 				s->s3->rrec.comp=(unsigned char *)
400 					OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
401 			if (s->s3->rrec.comp == NULL)
402 				goto err;
403 			}
404 #endif
405 		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
406  		if (s->version != DTLS1_VERSION)
407 			memset(&(s->s3->read_sequence[0]),0,8);
408 		mac_secret= &(s->s3->read_mac_secret[0]);
409 		mac_secret_size=&(s->s3->read_mac_secret_size);
410 		}
411 	else
412 		{
413 		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
414 			s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
415 			else
416 			s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
417 		if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
418 			reuse_dd = 1;
419 		else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
420 			goto err;
421 		dd= s->enc_write_ctx;
422 		if (SSL_IS_DTLS(s))
423 			{
424 			mac_ctx = EVP_MD_CTX_create();
425 			if (!mac_ctx)
426 				goto err;
427 			s->write_hash = mac_ctx;
428 			}
429 		else
430 			mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
431 #ifndef OPENSSL_NO_COMP
432 		if (s->compress != NULL)
433 			{
434 			COMP_CTX_free(s->compress);
435 			s->compress=NULL;
436 			}
437 		if (comp != NULL)
438 			{
439 			s->compress=COMP_CTX_new(comp->method);
440 			if (s->compress == NULL)
441 				{
442 				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
443 				goto err2;
444 				}
445 			}
446 #endif
447 		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
448  		if (s->version != DTLS1_VERSION)
449 			memset(&(s->s3->write_sequence[0]),0,8);
450 		mac_secret= &(s->s3->write_mac_secret[0]);
451 		mac_secret_size = &(s->s3->write_mac_secret_size);
452 		}
453 
454 	if (reuse_dd)
455 		EVP_CIPHER_CTX_cleanup(dd);
456 
457 	p=s->s3->tmp.key_block;
458 	i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
459 
460 	cl=EVP_CIPHER_key_length(c);
461 	j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
462 	               cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
463 	/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
464 	/* If GCM mode only part of IV comes from PRF */
465 	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
466 		k = EVP_GCM_TLS_FIXED_IV_LEN;
467 	else
468 		k=EVP_CIPHER_iv_length(c);
469 	if (	(which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
470 		(which == SSL3_CHANGE_CIPHER_SERVER_READ))
471 		{
472 		ms=  &(p[ 0]); n=i+i;
473 		key= &(p[ n]); n+=j+j;
474 		iv=  &(p[ n]); n+=k+k;
475 		exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
476 		exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
477 		client_write=1;
478 		}
479 	else
480 		{
481 		n=i;
482 		ms=  &(p[ n]); n+=i+j;
483 		key= &(p[ n]); n+=j+k;
484 		iv=  &(p[ n]); n+=k;
485 		exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
486 		exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
487 		client_write=0;
488 		}
489 
490 	if (n > s->s3->tmp.key_block_length)
491 		{
492 		SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
493 		goto err2;
494 		}
495 
496 	memcpy(mac_secret,ms,i);
497 
498 	if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
499 		{
500 		mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
501 				mac_secret,*mac_secret_size);
502 		EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
503 		EVP_PKEY_free(mac_key);
504 		}
505 #ifdef TLS_DEBUG
506 printf("which = %04X\nmac key=",which);
507 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
508 #endif
509 	if (is_export)
510 		{
511 		/* In here I set both the read and write key/iv to the
512 		 * same value since only the correct one will be used :-).
513 		 */
514 		if (!tls1_PRF(ssl_get_algorithm2(s),
515 				exp_label,exp_label_len,
516 				s->s3->client_random,SSL3_RANDOM_SIZE,
517 				s->s3->server_random,SSL3_RANDOM_SIZE,
518 				NULL,0,NULL,0,
519 				key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
520 			goto err2;
521 		key=tmp1;
522 
523 		if (k > 0)
524 			{
525 			if (!tls1_PRF(ssl_get_algorithm2(s),
526 					TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
527 					s->s3->client_random,SSL3_RANDOM_SIZE,
528 					s->s3->server_random,SSL3_RANDOM_SIZE,
529 					NULL,0,NULL,0,
530 					empty,0,iv1,iv2,k*2))
531 				goto err2;
532 			if (client_write)
533 				iv=iv1;
534 			else
535 				iv= &(iv1[k]);
536 			}
537 		}
538 
539 	s->session->key_arg_length=0;
540 #ifdef KSSL_DEBUG
541 	{
542         int i;
543 	printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
544 	printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
545 	printf("\n");
546 	printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
547 	printf("\n");
548 	}
549 #endif	/* KSSL_DEBUG */
550 
551 	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
552 		{
553 		EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
554 		EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
555 		}
556 	else
557 		EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
558 
559 	/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
560 	if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
561 		EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
562 				*mac_secret_size,mac_secret);
563 
564 #ifdef TLS_DEBUG
565 printf("which = %04X\nkey=",which);
566 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
567 printf("\niv=");
568 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
569 printf("\n");
570 #endif
571 
572 	OPENSSL_cleanse(tmp1,sizeof(tmp1));
573 	OPENSSL_cleanse(tmp2,sizeof(tmp1));
574 	OPENSSL_cleanse(iv1,sizeof(iv1));
575 	OPENSSL_cleanse(iv2,sizeof(iv2));
576 	return(1);
577 err:
578 	SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
579 err2:
580 	return(0);
581 	}
582 
583 int tls1_setup_key_block(SSL *s)
584 	{
585 	unsigned char *p1,*p2=NULL;
586 	const EVP_CIPHER *c;
587 	const EVP_MD *hash;
588 	int num;
589 	SSL_COMP *comp;
590 	int mac_type= NID_undef,mac_secret_size=0;
591 	int ret=0;
592 
593 #ifdef KSSL_DEBUG
594 	printf ("tls1_setup_key_block()\n");
595 #endif	/* KSSL_DEBUG */
596 
597 	if (s->s3->tmp.key_block_length != 0)
598 		return(1);
599 
600 	if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
601 		{
602 		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
603 		return(0);
604 		}
605 
606 	s->s3->tmp.new_sym_enc=c;
607 	s->s3->tmp.new_hash=hash;
608 	s->s3->tmp.new_mac_pkey_type = mac_type;
609 	s->s3->tmp.new_mac_secret_size = mac_secret_size;
610 	num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
611 	num*=2;
612 
613 	ssl3_cleanup_key_block(s);
614 
615 	if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
616 		{
617 		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
618 		goto err;
619 		}
620 
621 	s->s3->tmp.key_block_length=num;
622 	s->s3->tmp.key_block=p1;
623 
624 	if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
625 		{
626 		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
627 		goto err;
628 		}
629 
630 #ifdef TLS_DEBUG
631 printf("client random\n");
632 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
633 printf("server random\n");
634 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
635 printf("pre-master\n");
636 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
637 #endif
638 	if (!tls1_generate_key_block(s,p1,p2,num))
639 		goto err;
640 #ifdef TLS_DEBUG
641 printf("\nkey block\n");
642 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
643 #endif
644 
645 	if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
646 		&& s->method->version <= TLS1_VERSION)
647 		{
648 		/* enable vulnerability countermeasure for CBC ciphers with
649 		 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
650 		 */
651 		s->s3->need_empty_fragments = 1;
652 
653 		if (s->session->cipher != NULL)
654 			{
655 			if (s->session->cipher->algorithm_enc == SSL_eNULL)
656 				s->s3->need_empty_fragments = 0;
657 
658 #ifndef OPENSSL_NO_RC4
659 			if (s->session->cipher->algorithm_enc == SSL_RC4)
660 				s->s3->need_empty_fragments = 0;
661 #endif
662 			}
663 		}
664 
665 	ret = 1;
666 err:
667 	if (p2)
668 		{
669 		OPENSSL_cleanse(p2,num);
670 		OPENSSL_free(p2);
671 		}
672 	return(ret);
673 	}
674 
675 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
676  *
677  * Returns:
678  *   0: (in non-constant time) if the record is publically invalid (i.e. too
679  *       short etc).
680  *   1: if the record's padding is valid / the encryption was successful.
681  *   -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
682  *       an internal error occured.
683  */
684 int tls1_enc(SSL *s, int send)
685 	{
686 	SSL3_RECORD *rec;
687 	EVP_CIPHER_CTX *ds;
688 	unsigned long l;
689 	int bs,i,j,k,pad=0,ret,mac_size=0;
690 	const EVP_CIPHER *enc;
691 
692 	if (send)
693 		{
694 		if (EVP_MD_CTX_md(s->write_hash))
695 			{
696 			int n=EVP_MD_CTX_size(s->write_hash);
697 			OPENSSL_assert(n >= 0);
698 			}
699 		ds=s->enc_write_ctx;
700 		rec= &(s->s3->wrec);
701 		if (s->enc_write_ctx == NULL)
702 			enc=NULL;
703 		else
704 			{
705 			int ivlen;
706 			enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
707 			/* For TLSv1.1 and later explicit IV */
708 			if (s->version >= TLS1_1_VERSION
709 				&& EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
710 				ivlen = EVP_CIPHER_iv_length(enc);
711 			else
712 				ivlen = 0;
713 			if (ivlen > 1)
714 				{
715 				if ( rec->data != rec->input)
716 					/* we can't write into the input stream:
717 					 * Can this ever happen?? (steve)
718 					 */
719 					fprintf(stderr,
720 						"%s:%d: rec->data != rec->input\n",
721 						__FILE__, __LINE__);
722 				else if (RAND_bytes(rec->input, ivlen) <= 0)
723 					return -1;
724 				}
725 			}
726 		}
727 	else
728 		{
729 		if (EVP_MD_CTX_md(s->read_hash))
730 			{
731 			int n=EVP_MD_CTX_size(s->read_hash);
732 			OPENSSL_assert(n >= 0);
733 			}
734 		ds=s->enc_read_ctx;
735 		rec= &(s->s3->rrec);
736 		if (s->enc_read_ctx == NULL)
737 			enc=NULL;
738 		else
739 			enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
740 		}
741 
742 #ifdef KSSL_DEBUG
743 	printf("tls1_enc(%d)\n", send);
744 #endif    /* KSSL_DEBUG */
745 
746 	if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
747 		{
748 		memmove(rec->data,rec->input,rec->length);
749 		rec->input=rec->data;
750 		ret = 1;
751 		}
752 	else
753 		{
754 		l=rec->length;
755 		bs=EVP_CIPHER_block_size(ds->cipher);
756 
757 		if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
758 			{
759 			unsigned char buf[13],*seq;
760 
761 			seq = send?s->s3->write_sequence:s->s3->read_sequence;
762 
763 			if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
764 				{
765 				unsigned char dtlsseq[9],*p=dtlsseq;
766 
767 				s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
768 				memcpy(p,&seq[2],6);
769 				memcpy(buf,dtlsseq,8);
770 				}
771 			else
772 				{
773 				memcpy(buf,seq,8);
774 				for (i=7; i>=0; i--)	/* increment */
775 					{
776 					++seq[i];
777 					if (seq[i] != 0) break;
778 					}
779 				}
780 
781 			buf[8]=rec->type;
782 			buf[9]=(unsigned char)(s->version>>8);
783 			buf[10]=(unsigned char)(s->version);
784 			buf[11]=rec->length>>8;
785 			buf[12]=rec->length&0xff;
786 			pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
787 			if (send)
788 				{
789 				l+=pad;
790 				rec->length+=pad;
791 				}
792 			}
793 		else if ((bs != 1) && send)
794 			{
795 			i=bs-((int)l%bs);
796 
797 			/* Add weird padding of upto 256 bytes */
798 
799 			/* we need to add 'i' padding bytes of value j */
800 			j=i-1;
801 			if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
802 				{
803 				if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
804 					j++;
805 				}
806 			for (k=(int)l; k<(int)(l+i); k++)
807 				rec->input[k]=j;
808 			l+=i;
809 			rec->length+=i;
810 			}
811 
812 #ifdef KSSL_DEBUG
813 		{
814 		unsigned long ui;
815 		printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
816 			ds,rec->data,rec->input,l);
817 		printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
818 			ds->buf_len, ds->cipher->key_len,
819 			DES_KEY_SZ, DES_SCHEDULE_SZ,
820 			ds->cipher->iv_len);
821 		printf("\t\tIV: ");
822 		for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
823 		printf("\n");
824 		printf("\trec->input=");
825 		for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
826 		printf("\n");
827 		}
828 #endif	/* KSSL_DEBUG */
829 
830 		if (!send)
831 			{
832 			if (l == 0 || l%bs != 0)
833 				return 0;
834 			}
835 
836 		i = EVP_Cipher(ds,rec->data,rec->input,l);
837 		if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
838 						?(i<0)
839 						:(i==0))
840 			return -1;	/* AEAD can fail to verify MAC */
841 		if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
842 			{
843 			rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
844 			rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
845 			rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
846 			}
847 
848 #ifdef KSSL_DEBUG
849 		{
850 		unsigned long i;
851 		printf("\trec->data=");
852 		for (i=0; i<l; i++)
853 			printf(" %02x", rec->data[i]);  printf("\n");
854 		}
855 #endif	/* KSSL_DEBUG */
856 
857 		ret = 1;
858 		if (EVP_MD_CTX_md(s->read_hash) != NULL)
859 			mac_size = EVP_MD_CTX_size(s->read_hash);
860 		if ((bs != 1) && !send)
861 			ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
862 		if (pad && !send)
863 			rec->length -= pad;
864 		}
865 	return ret;
866 	}
867 
868 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
869 	{
870 	unsigned int ret;
871 	EVP_MD_CTX ctx, *d=NULL;
872 	int i;
873 
874 	if (s->s3->handshake_buffer)
875 		if (!ssl3_digest_cached_records(s))
876 			return 0;
877 
878 	for (i=0;i<SSL_MAX_DIGEST;i++)
879 		{
880 		  if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
881 		  	{
882 		  	d=s->s3->handshake_dgst[i];
883 			break;
884 			}
885 		}
886 	if (!d) {
887 		SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
888 		return 0;
889 	}
890 
891 	EVP_MD_CTX_init(&ctx);
892 	EVP_MD_CTX_copy_ex(&ctx,d);
893 	EVP_DigestFinal_ex(&ctx,out,&ret);
894 	EVP_MD_CTX_cleanup(&ctx);
895 	return((int)ret);
896 	}
897 
898 int tls1_final_finish_mac(SSL *s,
899 	     const char *str, int slen, unsigned char *out)
900 	{
901 	unsigned int i;
902 	EVP_MD_CTX ctx;
903 	unsigned char buf[2*EVP_MAX_MD_SIZE];
904 	unsigned char *q,buf2[12];
905 	int idx;
906 	long mask;
907 	int err=0;
908 	const EVP_MD *md;
909 
910 	q=buf;
911 
912 	if (s->s3->handshake_buffer)
913 		if (!ssl3_digest_cached_records(s))
914 			return 0;
915 
916 	EVP_MD_CTX_init(&ctx);
917 
918 	for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
919 		{
920 		if (mask & ssl_get_algorithm2(s))
921 			{
922 			int hashsize = EVP_MD_size(md);
923 			EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
924 			if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
925 				{
926 				/* internal error: 'buf' is too small for this cipersuite! */
927 				err = 1;
928 				}
929 			else
930 				{
931 				if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
932 					!EVP_DigestFinal_ex(&ctx,q,&i) ||
933 					(i != (unsigned int)hashsize))
934 					err = 1;
935 				q+=hashsize;
936 				}
937 			}
938 		}
939 
940 	if (!tls1_PRF(ssl_get_algorithm2(s),
941 			str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
942 			s->session->master_key,s->session->master_key_length,
943 			out,buf2,sizeof buf2))
944 		err = 1;
945 	EVP_MD_CTX_cleanup(&ctx);
946 
947 	if (err)
948 		return 0;
949 	else
950 		return sizeof buf2;
951 	}
952 
953 int tls1_mac(SSL *ssl, unsigned char *md, int send)
954 	{
955 	SSL3_RECORD *rec;
956 	unsigned char *seq;
957 	EVP_MD_CTX *hash;
958 	size_t md_size, orig_len;
959 	int i;
960 	EVP_MD_CTX hmac, *mac_ctx;
961 	unsigned char header[13];
962 	int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
963 	int t;
964 
965 	if (send)
966 		{
967 		rec= &(ssl->s3->wrec);
968 		seq= &(ssl->s3->write_sequence[0]);
969 		hash=ssl->write_hash;
970 		}
971 	else
972 		{
973 		rec= &(ssl->s3->rrec);
974 		seq= &(ssl->s3->read_sequence[0]);
975 		hash=ssl->read_hash;
976 		}
977 
978 	t=EVP_MD_CTX_size(hash);
979 	OPENSSL_assert(t >= 0);
980 	md_size=t;
981 
982 	/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
983 	if (stream_mac)
984 		{
985 			mac_ctx = hash;
986 		}
987 		else
988 		{
989 			if (!EVP_MD_CTX_copy(&hmac,hash))
990 				return -1;
991 			mac_ctx = &hmac;
992 		}
993 
994 	if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
995 		{
996 		unsigned char dtlsseq[8],*p=dtlsseq;
997 
998 		s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
999 		memcpy (p,&seq[2],6);
1000 
1001 		memcpy(header, dtlsseq, 8);
1002 		}
1003 	else
1004 		memcpy(header, seq, 8);
1005 
1006 	/* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
1007 	orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
1008 	rec->type &= 0xff;
1009 
1010 	header[8]=rec->type;
1011 	header[9]=(unsigned char)(ssl->version>>8);
1012 	header[10]=(unsigned char)(ssl->version);
1013 	header[11]=(rec->length)>>8;
1014 	header[12]=(rec->length)&0xff;
1015 
1016 	if (!send &&
1017 	    EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1018 	    ssl3_cbc_record_digest_supported(mac_ctx))
1019 		{
1020 		/* This is a CBC-encrypted record. We must avoid leaking any
1021 		 * timing-side channel information about how many blocks of
1022 		 * data we are hashing because that gives an attacker a
1023 		 * timing-oracle. */
1024 		ssl3_cbc_digest_record(
1025 			mac_ctx,
1026 			md, &md_size,
1027 			header, rec->input,
1028 			rec->length + md_size, orig_len,
1029 			ssl->s3->read_mac_secret,
1030 			ssl->s3->read_mac_secret_size,
1031 			0 /* not SSLv3 */);
1032 		}
1033 	else
1034 		{
1035 		EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1036 		EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1037 		t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1038 		OPENSSL_assert(t > 0);
1039 #ifdef OPENSSL_FIPS
1040 		if (!send && FIPS_mode())
1041 			tls_fips_digest_extra(
1042 	    				ssl->enc_read_ctx,
1043 					mac_ctx, rec->input,
1044 					rec->length, orig_len);
1045 #endif
1046 		}
1047 
1048 	if (!stream_mac)
1049 		EVP_MD_CTX_cleanup(&hmac);
1050 #ifdef TLS_DEBUG
1051 printf("sec=");
1052 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
1053 printf("seq=");
1054 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1055 printf("buf=");
1056 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
1057 printf("rec=");
1058 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
1059 #endif
1060 
1061 	if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
1062 		{
1063 		for (i=7; i>=0; i--)
1064 			{
1065 			++seq[i];
1066 			if (seq[i] != 0) break;
1067 			}
1068 		}
1069 
1070 #ifdef TLS_DEBUG
1071 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1072 #endif
1073 	return(md_size);
1074 	}
1075 
1076 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1077 	     int len)
1078 	{
1079 	unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1080 	const void *co = NULL, *so = NULL;
1081 	int col = 0, sol = 0;
1082 
1083 
1084 #ifdef KSSL_DEBUG
1085 	printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1086 #endif	/* KSSL_DEBUG */
1087 
1088 #ifdef TLSEXT_TYPE_opaque_prf_input
1089 	if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1090 	    s->s3->client_opaque_prf_input_len > 0 &&
1091 	    s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1092 		{
1093 		co = s->s3->client_opaque_prf_input;
1094 		col = s->s3->server_opaque_prf_input_len;
1095 		so = s->s3->server_opaque_prf_input;
1096 		sol = s->s3->client_opaque_prf_input_len; /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
1097 		}
1098 #endif
1099 
1100 	tls1_PRF(ssl_get_algorithm2(s),
1101 		TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1102 		s->s3->client_random,SSL3_RANDOM_SIZE,
1103 		co, col,
1104 		s->s3->server_random,SSL3_RANDOM_SIZE,
1105 		so, sol,
1106 		p,len,
1107 		s->session->master_key,buff,sizeof buff);
1108 #ifdef SSL_DEBUG
1109 	fprintf(stderr, "Premaster Secret:\n");
1110 	BIO_dump_fp(stderr, (char *)p, len);
1111 	fprintf(stderr, "Client Random:\n");
1112 	BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1113 	fprintf(stderr, "Server Random:\n");
1114 	BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1115 	fprintf(stderr, "Master Secret:\n");
1116 	BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1117 #endif
1118 
1119 #ifdef KSSL_DEBUG
1120 	printf ("tls1_generate_master_secret() complete\n");
1121 #endif	/* KSSL_DEBUG */
1122 	return(SSL3_MASTER_SECRET_SIZE);
1123 	}
1124 
1125 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1126 	 const char *label, size_t llen, const unsigned char *context,
1127 	 size_t contextlen, int use_context)
1128 	{
1129 	unsigned char *buff;
1130 	unsigned char *val = NULL;
1131 	size_t vallen, currentvalpos;
1132 	int rv;
1133 
1134 #ifdef KSSL_DEBUG
1135 	printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
1136 #endif	/* KSSL_DEBUG */
1137 
1138 	buff = OPENSSL_malloc(olen);
1139 	if (buff == NULL) goto err2;
1140 
1141 	/* construct PRF arguments
1142 	 * we construct the PRF argument ourself rather than passing separate
1143 	 * values into the TLS PRF to ensure that the concatenation of values
1144 	 * does not create a prohibited label.
1145 	 */
1146 	vallen = llen + SSL3_RANDOM_SIZE * 2;
1147 	if (use_context)
1148 		{
1149 		vallen += 2 + contextlen;
1150 		}
1151 
1152 	val = OPENSSL_malloc(vallen);
1153 	if (val == NULL) goto err2;
1154 	currentvalpos = 0;
1155 	memcpy(val + currentvalpos, (unsigned char *) label, llen);
1156 	currentvalpos += llen;
1157 	memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1158 	currentvalpos += SSL3_RANDOM_SIZE;
1159 	memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1160 	currentvalpos += SSL3_RANDOM_SIZE;
1161 
1162 	if (use_context)
1163 		{
1164 		val[currentvalpos] = (contextlen >> 8) & 0xff;
1165 		currentvalpos++;
1166 		val[currentvalpos] = contextlen & 0xff;
1167 		currentvalpos++;
1168 		if ((contextlen > 0) || (context != NULL))
1169 			{
1170 			memcpy(val + currentvalpos, context, contextlen);
1171 			}
1172 		}
1173 
1174 	/* disallow prohibited labels
1175 	 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1176 	 * 15, so size of val > max(prohibited label len) = 15 and the
1177 	 * comparisons won't have buffer overflow
1178 	 */
1179 	if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1180 		 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1181 	if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1182 		 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1183 	if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1184 		 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1185 	if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1186 		 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1187 
1188 	rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1189 		      val, vallen,
1190 		      NULL, 0,
1191 		      NULL, 0,
1192 		      NULL, 0,
1193 		      NULL, 0,
1194 		      s->session->master_key,s->session->master_key_length,
1195 		      out,buff,olen);
1196 
1197 #ifdef KSSL_DEBUG
1198 	printf ("tls1_export_keying_material() complete\n");
1199 #endif	/* KSSL_DEBUG */
1200 	goto ret;
1201 err1:
1202 	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1203 	rv = 0;
1204 	goto ret;
1205 err2:
1206 	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1207 	rv = 0;
1208 ret:
1209 	if (buff != NULL) OPENSSL_free(buff);
1210 	if (val != NULL) OPENSSL_free(val);
1211 	return(rv);
1212 	}
1213 
1214 int tls1_alert_code(int code)
1215 	{
1216 	switch (code)
1217 		{
1218 	case SSL_AD_CLOSE_NOTIFY:	return(SSL3_AD_CLOSE_NOTIFY);
1219 	case SSL_AD_UNEXPECTED_MESSAGE:	return(SSL3_AD_UNEXPECTED_MESSAGE);
1220 	case SSL_AD_BAD_RECORD_MAC:	return(SSL3_AD_BAD_RECORD_MAC);
1221 	case SSL_AD_DECRYPTION_FAILED:	return(TLS1_AD_DECRYPTION_FAILED);
1222 	case SSL_AD_RECORD_OVERFLOW:	return(TLS1_AD_RECORD_OVERFLOW);
1223 	case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1224 	case SSL_AD_HANDSHAKE_FAILURE:	return(SSL3_AD_HANDSHAKE_FAILURE);
1225 	case SSL_AD_NO_CERTIFICATE:	return(-1);
1226 	case SSL_AD_BAD_CERTIFICATE:	return(SSL3_AD_BAD_CERTIFICATE);
1227 	case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1228 	case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1229 	case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1230 	case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1231 	case SSL_AD_ILLEGAL_PARAMETER:	return(SSL3_AD_ILLEGAL_PARAMETER);
1232 	case SSL_AD_UNKNOWN_CA:		return(TLS1_AD_UNKNOWN_CA);
1233 	case SSL_AD_ACCESS_DENIED:	return(TLS1_AD_ACCESS_DENIED);
1234 	case SSL_AD_DECODE_ERROR:	return(TLS1_AD_DECODE_ERROR);
1235 	case SSL_AD_DECRYPT_ERROR:	return(TLS1_AD_DECRYPT_ERROR);
1236 	case SSL_AD_EXPORT_RESTRICTION:	return(TLS1_AD_EXPORT_RESTRICTION);
1237 	case SSL_AD_PROTOCOL_VERSION:	return(TLS1_AD_PROTOCOL_VERSION);
1238 	case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1239 	case SSL_AD_INTERNAL_ERROR:	return(TLS1_AD_INTERNAL_ERROR);
1240 	case SSL_AD_USER_CANCELLED:	return(TLS1_AD_USER_CANCELLED);
1241 	case SSL_AD_NO_RENEGOTIATION:	return(TLS1_AD_NO_RENEGOTIATION);
1242 	case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1243 	case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1244 	case SSL_AD_UNRECOGNIZED_NAME:	return(TLS1_AD_UNRECOGNIZED_NAME);
1245 	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1246 	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1247 	case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1248 #if 0 /* not appropriate for TLS, not used for DTLS */
1249 	case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1250 					  (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1251 #endif
1252 	default:			return(-1);
1253 		}
1254 	}
1255