aboutsummaryrefslogtreecommitdiffstats
path: root/ssl/t1_enc.c
blob: 0c4cddedf85c703e55d7b5bbf5be6612dabaf221 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
/* ssl/t1_enc.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#include <stdio.h>
#include "ssl_locl.h"
#ifndef OPENSSL_NO_COMP
#include <openssl/comp.h>
#endif
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <openssl/md5.h>
#include <openssl/rand.h>
#ifdef KSSL_DEBUG
#include <openssl/des.h>
#endif

/* seed1 through seed5 are virtually concatenated */
static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
			int sec_len,
			const void *seed1, int seed1_len,
			const void *seed2, int seed2_len,
			const void *seed3, int seed3_len,
			const void *seed4, int seed4_len,
			const void *seed5, int seed5_len,
			unsigned char *out, int olen)
	{
	int chunk;
	size_t j;
	EVP_MD_CTX ctx, ctx_tmp;
	EVP_PKEY *mac_key;
	unsigned char A1[EVP_MAX_MD_SIZE];
	size_t A1_len;
	int ret = 0;
	
	chunk=EVP_MD_size(md);
	OPENSSL_assert(chunk >= 0);

	EVP_MD_CTX_init(&ctx);
	EVP_MD_CTX_init(&ctx_tmp);
	EVP_MD_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
	EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
	mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
	if (!mac_key)
		goto err;
	if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
		goto err;
	if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
		goto err;
	if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
		goto err;
	if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
		goto err;
	if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
		goto err;
	if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
		goto err;
	if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
		goto err;
	if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
		goto err;

	for (;;)
		{
		/* Reinit mac contexts */
		if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
			goto err;
		if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
			goto err;
		if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
			goto err;
		if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
			goto err;
		if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
			goto err;
		if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
			goto err;
		if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
			goto err;
		if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
			goto err;
		if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
			goto err;

		if (olen > chunk)
			{
			if (!EVP_DigestSignFinal(&ctx,out,&j))
				goto err;
			out+=j;
			olen-=j;
			/* calc the next A1 value */
			if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
				goto err;
			}
		else	/* last one */
			{
			if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
				goto err;
			memcpy(out,A1,olen);
			break;
			}
		}
	ret = 1;
err:
	EVP_PKEY_free(mac_key);
	EVP_MD_CTX_cleanup(&ctx);
	EVP_MD_CTX_cleanup(&ctx_tmp);
	OPENSSL_cleanse(A1,sizeof(A1));
	return ret;
	}

/* seed1 through seed5 are virtually concatenated */
static int tls1_PRF(long digest_mask,
		     const void *seed1, int seed1_len,
		     const void *seed2, int seed2_len,
		     const void *seed3, int seed3_len,
		     const void *seed4, int seed4_len,
		     const void *seed5, int seed5_len,
		     const unsigned char *sec, int slen,
		     unsigned char *out1,
		     unsigned char *out2, int olen)
	{
	int len,i,idx,count;
	const unsigned char *S1;
	long m;
	const EVP_MD *md;
	int ret = 0;

	/* Count number of digests and partition sec evenly */
	count=0;
	for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
		if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
	}	
	len=slen/count;
	if (count == 1)
		slen = 0;
	S1=sec;
	memset(out1,0,olen);
	for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
		if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
			if (!md) {
				SSLerr(SSL_F_TLS1_PRF,
				SSL_R_UNSUPPORTED_DIGEST_TYPE);
				goto err;				
			}
			if (!tls1_P_hash(md ,S1,len+(slen&1),
					seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
					out2,olen))
				goto err;
			S1+=len;
			for (i=0; i<olen; i++)
			{
				out1[i]^=out2[i];
			}
		}
	}
	ret = 1;
err:
	return ret;
}
static int tls1_generate_key_block(SSL *s, unsigned char *km,
	     unsigned char *tmp, int num)
	{
	int ret;
	ret = tls1_PRF(ssl_get_algorithm2(s),
		 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
		 s->s3->server_random,SSL3_RANDOM_SIZE,
		 s->s3->client_random,SSL3_RANDOM_SIZE,
		 NULL,0,NULL,0,
		 s->session->master_key,s->session->master_key_length,
		 km,tmp,num);
#ifdef KSSL_DEBUG
	printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
                s->session->master_key_length);
	{
        int i;
        for (i=0; i < s->session->master_key_length; i++)
                {
                printf("%02X", s->session->master_key[i]);
                }
        printf("\n");  }
#endif    /* KSSL_DEBUG */
	return ret;
	}

int tls1_change_cipher_state(SSL *s, int which)
	{
	static const unsigned char empty[]="";
	unsigned char *p,*mac_secret;
	unsigned char *exp_label;
	unsigned char tmp1[EVP_MAX_KEY_LENGTH];
	unsigned char tmp2[EVP_MAX_KEY_LENGTH];
	unsigned char iv1[EVP_MAX_IV_LENGTH*2];
	unsigned char iv2[EVP_MAX_IV_LENGTH*2];
	unsigned char *ms,*key,*iv;
	int client_write;
	EVP_CIPHER_CTX *dd;
	const EVP_CIPHER *c;
#ifndef OPENSSL_NO_COMP
	const SSL_COMP *comp;
#endif
	const EVP_MD *m;
	int mac_type;
	int *mac_secret_size;
	EVP_MD_CTX *mac_ctx;
	EVP_PKEY *mac_key;
	int is_export,n,i,j,k,exp_label_len,cl;
	int reuse_dd = 0;

	is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
	c=s->s3->tmp.new_sym_enc;
	m=s->s3->tmp.new_hash;
	mac_type = s->s3->tmp.new_mac_pkey_type;
#ifndef OPENSSL_NO_COMP
	comp=s->s3->tmp.new_compression;
#endif

#ifdef KSSL_DEBUG
	printf("tls1_change_cipher_state(which= %d) w/\n", which);
	printf("\talg= %ld/%ld, comp= %p\n",
	       s->s3->tmp.new_cipher->algorithm_mkey,
	       s->s3->tmp.new_cipher->algorithm_auth,
	       comp);
	printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
	printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
                c->nid,c->block_size,c->key_len,c->iv_len);
	printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
	{
        int i;
        for (i=0; i<s->s3->tmp.key_block_length; i++)
		printf("%02x", s->s3->tmp.key_block[i]);  printf("\n");
        }
#endif	/* KSSL_DEBUG */

	if (which & SSL3_CC_READ)
		{
		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
			s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
		else
			s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;

		if (s->enc_read_ctx != NULL)
			reuse_dd = 1;
		else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
			goto err;
		else
			/* make sure it's intialized in case we exit later with an error */
			EVP_CIPHER_CTX_init(s->enc_read_ctx);
		dd= s->enc_read_ctx;
		mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
#ifndef OPENSSL_NO_COMP
		if (s->expand != NULL)
			{
			COMP_CTX_free(s->expand);
			s->expand=NULL;
			}
		if (comp != NULL)
			{
			s->expand=COMP_CTX_new(comp->method);
			if (s->expand == NULL)
				{
				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
				goto err2;
				}
			if (s->s3->rrec.comp == NULL)
				s->s3->rrec.comp=(unsigned char *)
					OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
			if (s->s3->rrec.comp == NULL)
				goto err;
			}
#endif
		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 		if (s->version != DTLS1_VERSION)
			memset(&(s->s3->read_sequence[0]),0,8);
		mac_secret= &(s->s3->read_mac_secret[0]);
		mac_secret_size=&(s->s3->read_mac_secret_size);
		}
	else
		{
		if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
			s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
			else
			s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
		if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
			reuse_dd = 1;
		else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
			goto err;
		dd= s->enc_write_ctx;
		if (SSL_IS_DTLS(s))
			{
			mac_ctx = EVP_MD_CTX_create();
			if (!mac_ctx)
				goto err;
			s->write_hash = mac_ctx;
			}
		else
			mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
#ifndef OPENSSL_NO_COMP
		if (s->compress != NULL)
			{
			COMP_CTX_free(s->compress);
			s->compress=NULL;
			}
		if (comp != NULL)
			{
			s->compress=COMP_CTX_new(comp->method);
			if (s->compress == NULL)
				{
				SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
				goto err2;
				}
			}
#endif
		/* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
 		if (s->version != DTLS1_VERSION)
			memset(&(s->s3->write_sequence[0]),0,8);
		mac_secret= &(s->s3->write_mac_secret[0]);
		mac_secret_size = &(s->s3->write_mac_secret_size);
		}

	if (reuse_dd)
		EVP_CIPHER_CTX_cleanup(dd);

	p=s->s3->tmp.key_block;
	i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;

	cl=EVP_CIPHER_key_length(c);
	j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
	               cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
	/* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
	/* If GCM mode only part of IV comes from PRF */
	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
		k = EVP_GCM_TLS_FIXED_IV_LEN;
	else
		k=EVP_CIPHER_iv_length(c);
	if (	(which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
		(which == SSL3_CHANGE_CIPHER_SERVER_READ))
		{
		ms=  &(p[ 0]); n=i+i;
		key= &(p[ n]); n+=j+j;
		iv=  &(p[ n]); n+=k+k;
		exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
		exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
		client_write=1;
		}
	else
		{
		n=i;
		ms=  &(p[ n]); n+=i+j;
		key= &(p[ n]); n+=j+k;
		iv=  &(p[ n]); n+=k;
		exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
		exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
		client_write=0;
		}

	if (n > s->s3->tmp.key_block_length)
		{
		SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
		goto err2;
		}

	memcpy(mac_secret,ms,i);

	if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
		{
		mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
				mac_secret,*mac_secret_size);
		EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
		EVP_PKEY_free(mac_key);
		}
#ifdef TLS_DEBUG
printf("which = %04X\nmac key=",which);
{ int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
#endif
	if (is_export)
		{
		/* In here I set both the read and write key/iv to the
		 * same value since only the correct one will be used :-).
		 */
		if (!tls1_PRF(ssl_get_algorithm2(s),
				exp_label,exp_label_len,
				s->s3->client_random,SSL3_RANDOM_SIZE,
				s->s3->server_random,SSL3_RANDOM_SIZE,
				NULL,0,NULL,0,
				key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
			goto err2;
		key=tmp1;

		if (k > 0)
			{
			if (!tls1_PRF(ssl_get_algorithm2(s),
					TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
					s->s3->client_random,SSL3_RANDOM_SIZE,
					s->s3->server_random,SSL3_RANDOM_SIZE,
					NULL,0,NULL,0,
					empty,0,iv1,iv2,k*2))
				goto err2;
			if (client_write)
				iv=iv1;
			else
				iv= &(iv1[k]);
			}
		}

	s->session->key_arg_length=0;
#ifdef KSSL_DEBUG
	{
        int i;
	printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
	printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
	printf("\n");
	printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
	printf("\n");
	}
#endif	/* KSSL_DEBUG */

	if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
		{
		EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
		EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
		}
	else	
		EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));

	/* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
	if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
		EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
				*mac_secret_size,mac_secret);

#ifdef TLS_DEBUG
printf("which = %04X\nkey=",which);
{ int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
printf("\niv=");
{ int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
printf("\n");
#endif

	OPENSSL_cleanse(tmp1,sizeof(tmp1));
	OPENSSL_cleanse(tmp2,sizeof(tmp1));
	OPENSSL_cleanse(iv1,sizeof(iv1));
	OPENSSL_cleanse(iv2,sizeof(iv2));
	return(1);
err:
	SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
err2:
	return(0);
	}

int tls1_setup_key_block(SSL *s)
	{
	unsigned char *p1,*p2=NULL;
	const EVP_CIPHER *c;
	const EVP_MD *hash;
	int num;
	SSL_COMP *comp;
	int mac_type= NID_undef,mac_secret_size=0;
	int ret=0;

#ifdef KSSL_DEBUG
	printf ("tls1_setup_key_block()\n");
#endif	/* KSSL_DEBUG */

	if (s->s3->tmp.key_block_length != 0)
		return(1);

	if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
		{
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
		return(0);
		}

	s->s3->tmp.new_sym_enc=c;
	s->s3->tmp.new_hash=hash;
	s->s3->tmp.new_mac_pkey_type = mac_type;
	s->s3->tmp.new_mac_secret_size = mac_secret_size;
	num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
	num*=2;

	ssl3_cleanup_key_block(s);

	if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
		{
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	s->s3->tmp.key_block_length=num;
	s->s3->tmp.key_block=p1;

	if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
		{
		SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
		goto err;
		}

#ifdef TLS_DEBUG
printf("client random\n");
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
printf("server random\n");
{ int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
printf("pre-master\n");
{ int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
#endif
	if (!tls1_generate_key_block(s,p1,p2,num))
		goto err;
#ifdef TLS_DEBUG
printf("\nkey block\n");
{ int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
#endif

	if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
		&& s->method->version <= TLS1_VERSION)
		{
		/* enable vulnerability countermeasure for CBC ciphers with
		 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
		 */
		s->s3->need_empty_fragments = 1;

		if (s->session->cipher != NULL)
			{
			if (s->session->cipher->algorithm_enc == SSL_eNULL)
				s->s3->need_empty_fragments = 0;
			
#ifndef OPENSSL_NO_RC4
			if (s->session->cipher->algorithm_enc == SSL_RC4)
				s->s3->need_empty_fragments = 0;
#endif
			}
		}
		
	ret = 1;
err:
	if (p2)
		{
		OPENSSL_cleanse(p2,num);
		OPENSSL_free(p2);
		}
	return(ret);
	}

/* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
 *
 * Returns:
 *   0: (in non-constant time) if the record is publically invalid (i.e. too
 *       short etc).
 *   1: if the record's padding is valid / the encryption was successful.
 *   -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
 *       an internal error occured.
 */
int tls1_enc(SSL *s, int send)
	{
	SSL3_RECORD *rec;
	EVP_CIPHER_CTX *ds;
	unsigned long l;
	int bs,i,j,k,pad=0,ret,mac_size=0;
	const EVP_CIPHER *enc;

	if (send)
		{
		if (EVP_MD_CTX_md(s->write_hash))
			{
			int n=EVP_MD_CTX_size(s->write_hash);
			OPENSSL_assert(n >= 0);
			}
		ds=s->enc_write_ctx;
		rec= &(s->s3->wrec);
		if (s->enc_write_ctx == NULL)
			enc=NULL;
		else
			{
			int ivlen;
			enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
			/* For TLSv1.1 and later explicit IV */
			if (s->version >= TLS1_1_VERSION
				&& EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
				ivlen = EVP_CIPHER_iv_length(enc);
			else
				ivlen = 0;
			if (ivlen > 1)
				{
				if ( rec->data != rec->input)
					/* we can't write into the input stream:
					 * Can this ever happen?? (steve)
					 */
					fprintf(stderr,
						"%s:%d: rec->data != rec->input\n",
						__FILE__, __LINE__);
				else if (RAND_bytes(rec->input, ivlen) <= 0)
					return -1;
				}
			}
		}
	else
		{
		if (EVP_MD_CTX_md(s->read_hash))
			{
			int n=EVP_MD_CTX_size(s->read_hash);
			OPENSSL_assert(n >= 0);
			}
		ds=s->enc_read_ctx;
		rec= &(s->s3->rrec);
		if (s->enc_read_ctx == NULL)
			enc=NULL;
		else
			enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
		}

#ifdef KSSL_DEBUG
	printf("tls1_enc(%d)\n", send);
#endif    /* KSSL_DEBUG */

	if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
		{
		memmove(rec->data,rec->input,rec->length);
		rec->input=rec->data;
		ret = 1;
		}
	else
		{
		l=rec->length;
		bs=EVP_CIPHER_block_size(ds->cipher);

		if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
			{
			unsigned char buf[13],*seq;

			seq = send?s->s3->write_sequence:s->s3->read_sequence;

			if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
				{
				unsigned char dtlsseq[9],*p=dtlsseq;

				s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
				memcpy(p,&seq[2],6);
				memcpy(buf,dtlsseq,8);
				}
			else
				{
				memcpy(buf,seq,8);
				for (i=7; i>=0; i--)	/* increment */
					{
					++seq[i];
					if (seq[i] != 0) break; 
					}
				}

			buf[8]=rec->type;
			buf[9]=(unsigned char)(s->version>>8);
			buf[10]=(unsigned char)(s->version);
			buf[11]=rec->length>>8;
			buf[12]=rec->length&0xff;
			pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
			if (send)
				{
				l+=pad;
				rec->length+=pad;
				}
			}
		else if ((bs != 1) && send)
			{
			i=bs-((int)l%bs);

			/* Add weird padding of upto 256 bytes */

			/* we need to add 'i' padding bytes of value j */
			j=i-1;
			if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
				{
				if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
					j++;
				}
			for (k=(int)l; k<(int)(l+i); k++)
				rec->input[k]=j;
			l+=i;
			rec->length+=i;
			}

#ifdef KSSL_DEBUG
		{
		unsigned long ui;
		printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
			ds,rec->data,rec->input,l);
		printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
			ds->buf_len, ds->cipher->key_len,
			DES_KEY_SZ, DES_SCHEDULE_SZ,
			ds->cipher->iv_len);
		printf("\t\tIV: ");
		for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
		printf("\n");
		printf("\trec->input=");
		for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
		printf("\n");
		}
#endif	/* KSSL_DEBUG */

		if (!send)
			{
			if (l == 0 || l%bs != 0)
				return 0;
			}
		
		i = EVP_Cipher(ds,rec->data,rec->input,l);
		if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
						?(i<0)
						:(i==0))
			return -1;	/* AEAD can fail to verify MAC */
		if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
			{
			rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
			rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
			rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
			}

#ifdef KSSL_DEBUG
		{
		unsigned long i;
		printf("\trec->data=");
		for (i=0; i<l; i++)
			printf(" %02x", rec->data[i]);  printf("\n");
		}
#endif	/* KSSL_DEBUG */

		ret = 1;
		if (EVP_MD_CTX_md(s->read_hash) != NULL)
			mac_size = EVP_MD_CTX_size(s->read_hash);
		if ((bs != 1) && !send)
			ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
		if (pad && !send)
			rec->length -= pad;
		}
	return ret;
	}

int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
	{
	unsigned int ret;
	EVP_MD_CTX ctx, *d=NULL;
	int i;

	if (s->s3->handshake_buffer) 
		if (!ssl3_digest_cached_records(s))
			return 0;

	for (i=0;i<SSL_MAX_DIGEST;i++) 
		{
		  if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid) 
		  	{
		  	d=s->s3->handshake_dgst[i];
			break;
			}
		}
	if (!d) {
		SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
		return 0;
	}	

	EVP_MD_CTX_init(&ctx);
	EVP_MD_CTX_copy_ex(&ctx,d);
	EVP_DigestFinal_ex(&ctx,out,&ret);
	EVP_MD_CTX_cleanup(&ctx);
	return((int)ret);
	}

int tls1_final_finish_mac(SSL *s,
	     const char *str, int slen, unsigned char *out)
	{
	unsigned int i;
	EVP_MD_CTX ctx;
	unsigned char buf[2*EVP_MAX_MD_SIZE];
	unsigned char *q,buf2[12];
	int idx;
	long mask;
	int err=0;
	const EVP_MD *md; 

	q=buf;

	if (s->s3->handshake_buffer) 
		if (!ssl3_digest_cached_records(s))
			return 0;

	EVP_MD_CTX_init(&ctx);

	for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
		{
		if (mask & ssl_get_algorithm2(s))
			{
			int hashsize = EVP_MD_size(md);
			EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
			if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
				{
				/* internal error: 'buf' is too small for this cipersuite! */
				err = 1;
				}
			else
				{
				if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
					!EVP_DigestFinal_ex(&ctx,q,&i) ||
					(i != (unsigned int)hashsize))
					err = 1;
				q+=hashsize;
				}
			}
		}
		
	if (!tls1_PRF(ssl_get_algorithm2(s),
			str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
			s->session->master_key,s->session->master_key_length,
			out,buf2,sizeof buf2))
		err = 1;
	EVP_MD_CTX_cleanup(&ctx);

	if (err)
		return 0;
	else
		return sizeof buf2;
	}

int tls1_mac(SSL *ssl, unsigned char *md, int send)
	{
	SSL3_RECORD *rec;
	unsigned char *seq;
	EVP_MD_CTX *hash;
	size_t md_size, orig_len;
	int i;
	EVP_MD_CTX hmac, *mac_ctx;
	unsigned char header[13];
	int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
	int t;

	if (send)
		{
		rec= &(ssl->s3->wrec);
		seq= &(ssl->s3->write_sequence[0]);
		hash=ssl->write_hash;
		}
	else
		{
		rec= &(ssl->s3->rrec);
		seq= &(ssl->s3->read_sequence[0]);
		hash=ssl->read_hash;
		}

	t=EVP_MD_CTX_size(hash);
	OPENSSL_assert(t >= 0);
	md_size=t;

	/* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
	if (stream_mac) 
		{
			mac_ctx = hash;
		}
		else
		{
			if (!EVP_MD_CTX_copy(&hmac,hash))
				return -1;
			mac_ctx = &hmac;
		}

	if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
		{
		unsigned char dtlsseq[8],*p=dtlsseq;

		s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
		memcpy (p,&seq[2],6);

		memcpy(header, dtlsseq, 8);
		}
	else
		memcpy(header, seq, 8);

	/* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
	orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
	rec->type &= 0xff;

	header[8]=rec->type;
	header[9]=(unsigned char)(ssl->version>>8);
	header[10]=(unsigned char)(ssl->version);
	header[11]=(rec->length)>>8;
	header[12]=(rec->length)&0xff;

	if (!send &&
	    EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
	    ssl3_cbc_record_digest_supported(mac_ctx))
		{
		/* This is a CBC-encrypted record. We must avoid leaking any
		 * timing-side channel information about how many blocks of
		 * data we are hashing because that gives an attacker a
		 * timing-oracle. */
		ssl3_cbc_digest_record(
			mac_ctx,
			md, &md_size,
			header, rec->input,
			rec->length + md_size, orig_len,
			ssl->s3->read_mac_secret,
			ssl->s3->read_mac_secret_size,
			0 /* not SSLv3 */);
		}
	else
		{
		EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
		EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
		t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
		OPENSSL_assert(t > 0);
#ifdef OPENSSL_FIPS
		if (!send && FIPS_mode())
			tls_fips_digest_extra(
	    				ssl->enc_read_ctx,
					mac_ctx, rec->input,
					rec->length, orig_len);
#endif
		}
		
	if (!stream_mac)
		EVP_MD_CTX_cleanup(&hmac);
#ifdef TLS_DEBUG
printf("sec=");
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
printf("seq=");
{int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
printf("buf=");
{int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
printf("rec=");
{unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
#endif

	if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
		{
		for (i=7; i>=0; i--)
			{
			++seq[i];
			if (seq[i] != 0) break; 
			}
		}

#ifdef TLS_DEBUG
{unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
#endif
	return(md_size);
	}

int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
	     int len)
	{
	unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
	const void *co = NULL, *so = NULL;
	int col = 0, sol = 0;


#ifdef KSSL_DEBUG
	printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
#endif	/* KSSL_DEBUG */

#ifdef TLSEXT_TYPE_opaque_prf_input
	if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
	    s->s3->client_opaque_prf_input_len > 0 &&
	    s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
		{
		co = s->s3->client_opaque_prf_input;
		col = s->s3->server_opaque_prf_input_len;
		so = s->s3->server_opaque_prf_input;
		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) */
		}
#endif

	tls1_PRF(ssl_get_algorithm2(s),
		TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
		s->s3->client_random,SSL3_RANDOM_SIZE,
		co, col,
		s->s3->server_random,SSL3_RANDOM_SIZE,
		so, sol,
		p,len,
		s->session->master_key,buff,sizeof buff);
#ifdef SSL_DEBUG
	fprintf(stderr, "Premaster Secret:\n");
	BIO_dump_fp(stderr, (char *)p, len);
	fprintf(stderr, "Client Random:\n");
	BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
	fprintf(stderr, "Server Random:\n");
	BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
	fprintf(stderr, "Master Secret:\n");
	BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
#endif

#ifdef KSSL_DEBUG
	printf ("tls1_generate_master_secret() complete\n");
#endif	/* KSSL_DEBUG */
	return(SSL3_MASTER_SECRET_SIZE);
	}

int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
	 const char *label, size_t llen, const unsigned char *context,
	 size_t contextlen, int use_context)
	{
	unsigned char *buff;
	unsigned char *val = NULL;
	size_t vallen, currentvalpos;
	int rv;

#ifdef KSSL_DEBUG
	printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
#endif	/* KSSL_DEBUG */

	buff = OPENSSL_malloc(olen);
	if (buff == NULL) goto err2;

	/* construct PRF arguments
	 * we construct the PRF argument ourself rather than passing separate
	 * values into the TLS PRF to ensure that the concatenation of values
	 * does not create a prohibited label.
	 */
	vallen = llen + SSL3_RANDOM_SIZE * 2;
	if (use_context)
		{
		vallen += 2 + contextlen;
		}

	val = OPENSSL_malloc(vallen);
	if (val == NULL) goto err2;
	currentvalpos = 0;
	memcpy(val + currentvalpos, (unsigned char *) label, llen);
	currentvalpos += llen;
	memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
	currentvalpos += SSL3_RANDOM_SIZE;
	memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
	currentvalpos += SSL3_RANDOM_SIZE;

	if (use_context)
		{
		val[currentvalpos] = (contextlen >> 8) & 0xff;
		currentvalpos++;
		val[currentvalpos] = contextlen & 0xff;
		currentvalpos++;
		if ((contextlen > 0) || (context != NULL))
			{
			memcpy(val + currentvalpos, context, contextlen);
			}
		}

	/* disallow prohibited labels
	 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
	 * 15, so size of val > max(prohibited label len) = 15 and the
	 * comparisons won't have buffer overflow
	 */
	if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
		 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
	if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
		 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
	if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
		 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
	if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
		 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;

	rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
		      val, vallen,
		      NULL, 0,
		      NULL, 0,
		      NULL, 0,
		      NULL, 0,
		      s->session->master_key,s->session->master_key_length,
		      out,buff,olen);

#ifdef KSSL_DEBUG
	printf ("tls1_export_keying_material() complete\n");
#endif	/* KSSL_DEBUG */
	goto ret;
err1:
	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
	rv = 0;
	goto ret;
err2:
	SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
	rv = 0;
ret:
	if (buff != NULL) OPENSSL_free(buff);
	if (val != NULL) OPENSSL_free(val);
	return(rv);
	}

int tls1_alert_code(int code)
	{
	switch (code)
		{
	case SSL_AD_CLOSE_NOTIFY:	return(SSL3_AD_CLOSE_NOTIFY);
	case SSL_AD_UNEXPECTED_MESSAGE:	return(SSL3_AD_UNEXPECTED_MESSAGE);
	case SSL_AD_BAD_RECORD_MAC:	return(SSL3_AD_BAD_RECORD_MAC);
	case SSL_AD_DECRYPTION_FAILED:	return(TLS1_AD_DECRYPTION_FAILED);
	case SSL_AD_RECORD_OVERFLOW:	return(TLS1_AD_RECORD_OVERFLOW);
	case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
	case SSL_AD_HANDSHAKE_FAILURE:	return(SSL3_AD_HANDSHAKE_FAILURE);
	case SSL_AD_NO_CERTIFICATE:	return(-1);
	case SSL_AD_BAD_CERTIFICATE:	return(SSL3_AD_BAD_CERTIFICATE);
	case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
	case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
	case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
	case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
	case SSL_AD_ILLEGAL_PARAMETER:	return(SSL3_AD_ILLEGAL_PARAMETER);
	case SSL_AD_UNKNOWN_CA:		return(TLS1_AD_UNKNOWN_CA);
	case SSL_AD_ACCESS_DENIED:	return(TLS1_AD_ACCESS_DENIED);
	case SSL_AD_DECODE_ERROR:	return(TLS1_AD_DECODE_ERROR);
	case SSL_AD_DECRYPT_ERROR:	return(TLS1_AD_DECRYPT_ERROR);
	case SSL_AD_EXPORT_RESTRICTION:	return(TLS1_AD_EXPORT_RESTRICTION);
	case SSL_AD_PROTOCOL_VERSION:	return(TLS1_AD_PROTOCOL_VERSION);
	case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
	case SSL_AD_INTERNAL_ERROR:	return(TLS1_AD_INTERNAL_ERROR);
	case SSL_AD_USER_CANCELLED:	return(TLS1_AD_USER_CANCELLED);
	case SSL_AD_NO_RENEGOTIATION:	return(TLS1_AD_NO_RENEGOTIATION);
	case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
	case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
	case SSL_AD_UNRECOGNIZED_NAME:	return(TLS1_AD_UNRECOGNIZED_NAME);
	case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
	case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
	case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
#if 0 /* not appropriate for TLS, not used for DTLS */
	case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return 
					  (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
#endif
	default:			return(-1);
		}
	}