2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
111 /* ====================================================================
112 * Copyright 2005 Nokia. All rights reserved.
114 * The portions of the attached software ("Contribution") is developed by
115 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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.
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.
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.
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
139 #include "ssl_locl.h"
140 #include <openssl/comp.h>
141 #include <openssl/evp.h>
142 #include <openssl/hmac.h>
143 #include <openssl/md5.h>
145 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
146 int sec_len, unsigned char *seed, int seed_len,
147 unsigned char *out, int olen)
153 unsigned char A1[EVP_MAX_MD_SIZE];
156 chunk=EVP_MD_size(md);
159 HMAC_CTX_init(&ctx_tmp);
160 HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
161 HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
162 HMAC_Update(&ctx,seed,seed_len);
163 HMAC_Final(&ctx,A1,&A1_len);
168 HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
169 HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
170 HMAC_Update(&ctx,A1,A1_len);
171 HMAC_Update(&ctx_tmp,A1,A1_len);
172 HMAC_Update(&ctx,seed,seed_len);
176 HMAC_Final(&ctx,out,&j);
179 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
183 HMAC_Final(&ctx,A1,&A1_len);
188 HMAC_CTX_cleanup(&ctx);
189 HMAC_CTX_cleanup(&ctx_tmp);
190 OPENSSL_cleanse(A1,sizeof(A1));
193 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
194 unsigned char *label, int label_len,
195 const unsigned char *sec, int slen, unsigned char *out1,
196 unsigned char *out2, int olen)
199 const unsigned char *S1,*S2;
204 len+=(slen&1); /* add for odd, make longer */
207 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
208 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
210 for (i=0; i<olen; i++)
214 static void tls1_generate_key_block(SSL *s, unsigned char *km,
215 unsigned char *tmp, int num)
218 unsigned char buf[SSL3_RANDOM_SIZE*2+
219 TLS_MD_MAX_CONST_SIZE];
222 memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
223 TLS_MD_KEY_EXPANSION_CONST_SIZE);
224 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
225 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
227 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
230 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
231 s->session->master_key,s->session->master_key_length,
234 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
235 s->session->master_key_length);
238 for (i=0; i < s->session->master_key_length; i++)
240 printf("%02X", s->session->master_key[i]);
243 #endif /* KSSL_DEBUG */
246 int tls1_change_cipher_state(SSL *s, int which)
248 static const unsigned char empty[]="";
249 unsigned char *p,*key_block,*mac_secret;
250 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
252 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
253 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
254 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
255 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
256 unsigned char *ms,*key,*iv,*er1,*er2;
260 #ifndef OPENSSL_NO_COMP
261 const SSL_COMP *comp;
264 int is_export,n,i,j,k,exp_label_len,cl;
267 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
268 c=s->s3->tmp.new_sym_enc;
269 m=s->s3->tmp.new_hash;
270 #ifndef OPENSSL_NO_COMP
271 comp=s->s3->tmp.new_compression;
273 key_block=s->s3->tmp.key_block;
276 printf("tls1_change_cipher_state(which= %d) w/\n", which);
277 printf("\talg= %ld/%ld, comp= %p\n",
278 s->s3->tmp.new_cipher->algorithm_mkey,
279 s->s3->tmp.new_cipher->algorithm_auth,
281 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
282 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
283 c->nid,c->block_size,c->key_len,c->iv_len);
284 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
287 for (i=0; i<s->s3->tmp.key_block_length; i++)
288 printf("%02x", key_block[i]); printf("\n");
290 #endif /* KSSL_DEBUG */
292 if (which & SSL3_CC_READ)
294 if (s->enc_read_ctx != NULL)
296 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
299 /* make sure it's intialized in case we exit later with an error */
300 EVP_CIPHER_CTX_init(s->enc_read_ctx);
303 #ifndef OPENSSL_NO_COMP
304 if (s->expand != NULL)
306 COMP_CTX_free(s->expand);
311 s->expand=COMP_CTX_new(comp->method);
312 if (s->expand == NULL)
314 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
317 if (s->s3->rrec.comp == NULL)
318 s->s3->rrec.comp=(unsigned char *)
319 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
320 if (s->s3->rrec.comp == NULL)
324 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
325 if (s->version != DTLS1_VERSION)
326 memset(&(s->s3->read_sequence[0]),0,8);
327 mac_secret= &(s->s3->read_mac_secret[0]);
331 if (s->enc_write_ctx != NULL)
333 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
336 /* make sure it's intialized in case we exit later with an error */
337 EVP_CIPHER_CTX_init(s->enc_write_ctx);
338 dd= s->enc_write_ctx;
340 #ifndef OPENSSL_NO_COMP
341 if (s->compress != NULL)
343 COMP_CTX_free(s->compress);
348 s->compress=COMP_CTX_new(comp->method);
349 if (s->compress == NULL)
351 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
356 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
357 if (s->version != DTLS1_VERSION)
358 memset(&(s->s3->write_sequence[0]),0,8);
359 mac_secret= &(s->s3->write_mac_secret[0]);
363 EVP_CIPHER_CTX_cleanup(dd);
365 p=s->s3->tmp.key_block;
367 cl=EVP_CIPHER_key_length(c);
368 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
369 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
370 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
371 k=EVP_CIPHER_iv_length(c);
372 er1= &(s->s3->client_random[0]);
373 er2= &(s->s3->server_random[0]);
374 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
375 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
378 key= &(p[ n]); n+=j+j;
379 iv= &(p[ n]); n+=k+k;
380 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
381 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
387 ms= &(p[ n]); n+=i+j;
388 key= &(p[ n]); n+=j+k;
390 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
391 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
395 if (n > s->s3->tmp.key_block_length)
397 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
401 memcpy(mac_secret,ms,i);
403 printf("which = %04X\nmac key=",which);
404 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
408 /* In here I set both the read and write key/iv to the
409 * same value since only the correct one will be used :-).
412 memcpy(p,exp_label,exp_label_len);
414 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
416 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
418 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
419 tmp1,tmp2,EVP_CIPHER_key_length(c));
425 memcpy(p,TLS_MD_IV_BLOCK_CONST,
426 TLS_MD_IV_BLOCK_CONST_SIZE);
427 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
428 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
430 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
432 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
441 s->session->key_arg_length=0;
445 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
446 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
448 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
451 #endif /* KSSL_DEBUG */
453 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
455 printf("which = %04X\nkey=",which);
456 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
458 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
462 OPENSSL_cleanse(tmp1,sizeof(tmp1));
463 OPENSSL_cleanse(tmp2,sizeof(tmp1));
464 OPENSSL_cleanse(iv1,sizeof(iv1));
465 OPENSSL_cleanse(iv2,sizeof(iv2));
468 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
473 int tls1_setup_key_block(SSL *s)
475 unsigned char *p1,*p2;
482 printf ("tls1_setup_key_block()\n");
483 #endif /* KSSL_DEBUG */
485 if (s->s3->tmp.key_block_length != 0)
488 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
490 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
494 s->s3->tmp.new_sym_enc=c;
495 s->s3->tmp.new_hash=hash;
497 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
500 ssl3_cleanup_key_block(s);
502 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
504 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
507 s->s3->tmp.key_block_length=num;
508 s->s3->tmp.key_block=p1;
512 printf("client random\n");
513 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
514 printf("server random\n");
515 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
516 printf("pre-master\n");
517 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
519 tls1_generate_key_block(s,p1,p2,num);
520 OPENSSL_cleanse(p2,num);
523 printf("\nkey block\n");
524 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
527 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
529 /* enable vulnerability countermeasure for CBC ciphers with
530 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
532 s->s3->need_empty_fragments = 1;
534 if (s->session->cipher != NULL)
536 if (s->session->cipher->algorithm_enc == SSL_eNULL)
537 s->s3->need_empty_fragments = 0;
539 #ifndef OPENSSL_NO_RC4
540 if (s->session->cipher->algorithm_enc == SSL_RC4)
541 s->s3->need_empty_fragments = 0;
548 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
552 int tls1_enc(SSL *s, int send)
558 const EVP_CIPHER *enc;
562 if (s->write_hash != NULL)
563 n=EVP_MD_size(s->write_hash);
566 if (s->enc_write_ctx == NULL)
569 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
573 if (s->read_hash != NULL)
574 n=EVP_MD_size(s->read_hash);
577 if (s->enc_read_ctx == NULL)
580 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
584 printf("tls1_enc(%d)\n", send);
585 #endif /* KSSL_DEBUG */
587 if ((s->session == NULL) || (ds == NULL) ||
590 memmove(rec->data,rec->input,rec->length);
591 rec->input=rec->data;
596 bs=EVP_CIPHER_block_size(ds->cipher);
598 if ((bs != 1) && send)
602 /* Add weird padding of upto 256 bytes */
604 /* we need to add 'i' padding bytes of value j */
606 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
608 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
611 for (k=(int)l; k<(int)(l+i); k++)
620 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
621 ds,rec->data,rec->input,l);
622 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
623 ds->buf_len, ds->cipher->key_len,
624 DES_KEY_SZ, DES_SCHEDULE_SZ,
627 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
629 printf("\trec->input=");
630 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
633 #endif /* KSSL_DEBUG */
637 if (l == 0 || l%bs != 0)
639 SSLerr(SSL_F_TLS1_ENC,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG);
640 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECRYPTION_FAILED);
645 EVP_Cipher(ds,rec->data,rec->input,l);
650 printf("\trec->data=");
652 printf(" %02x", rec->data[i]); printf("\n");
654 #endif /* KSSL_DEBUG */
656 if ((bs != 1) && !send)
658 ii=i=rec->data[l-1]; /* padding_length */
660 /* NB: if compression is in operation the first packet
661 * may not be of even length so the padding bug check
662 * cannot be performed. This bug workaround has been
663 * around since SSLeay so hopefully it is either fixed
664 * now or no buggy implementation supports compression
667 if ( (s->options&SSL_OP_TLS_BLOCK_PADDING_BUG)
670 /* First packet is even in size, so check */
671 if ((memcmp(s->s3->read_sequence,
672 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii & 1))
673 s->s3->flags|=TLS1_FLAGS_TLS_PADDING_BUG;
674 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
677 /* TLS 1.0 does not bound the number of padding bytes by the block size.
678 * All of them must have value 'padding_length'. */
679 if (i > (int)rec->length)
681 /* Incorrect padding. SSLerr() and ssl3_alert are done
682 * by caller: we don't want to reveal whether this is
683 * a decryption error or a MAC verification failure
684 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
687 for (j=(int)(l-i); j<(int)l; j++)
689 if (rec->data[j] != ii)
691 /* Incorrect padding */
701 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
706 EVP_MD_CTX_init(&ctx);
707 EVP_MD_CTX_copy_ex(&ctx,in_ctx);
708 EVP_DigestFinal_ex(&ctx,out,&ret);
709 EVP_MD_CTX_cleanup(&ctx);
713 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
714 const char *str, int slen, unsigned char *out)
718 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
719 unsigned char *q,buf2[12];
725 EVP_MD_CTX_init(&ctx);
726 EVP_MD_CTX_copy_ex(&ctx,in1_ctx);
727 EVP_DigestFinal_ex(&ctx,q,&i);
729 EVP_MD_CTX_copy_ex(&ctx,in2_ctx);
730 EVP_DigestFinal_ex(&ctx,q,&i);
733 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
734 s->session->master_key,s->session->master_key_length,
735 out,buf2,sizeof buf2);
736 EVP_MD_CTX_cleanup(&ctx);
741 int tls1_mac(SSL *ssl, unsigned char *md, int send)
744 unsigned char *mac_sec,*seq;
746 unsigned int md_size;
749 unsigned char buf[5];
753 rec= &(ssl->s3->wrec);
754 mac_sec= &(ssl->s3->write_mac_secret[0]);
755 seq= &(ssl->s3->write_sequence[0]);
756 hash=ssl->write_hash;
760 rec= &(ssl->s3->rrec);
761 mac_sec= &(ssl->s3->read_mac_secret[0]);
762 seq= &(ssl->s3->read_sequence[0]);
766 md_size=EVP_MD_size(hash);
769 buf[1]=TLS1_VERSION_MAJOR;
770 buf[2]=TLS1_VERSION_MINOR;
771 buf[3]=rec->length>>8;
772 buf[4]=rec->length&0xff;
774 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
775 HMAC_CTX_init(&hmac);
776 HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
777 HMAC_Update(&hmac,seq,8);
778 HMAC_Update(&hmac,buf,5);
779 HMAC_Update(&hmac,rec->input,rec->length);
780 HMAC_Final(&hmac,md,&md_size);
781 HMAC_CTX_cleanup(&hmac);
785 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
787 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
789 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
791 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
794 if ( SSL_version(ssl) != DTLS1_VERSION)
799 if (seq[i] != 0) break;
804 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
809 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
812 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
813 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
816 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
817 #endif /* KSSL_DEBUG */
819 /* Setup the stuff to munge */
820 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
821 TLS_MD_MASTER_SECRET_CONST_SIZE);
822 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
823 s->s3->client_random,SSL3_RANDOM_SIZE);
824 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
825 s->s3->server_random,SSL3_RANDOM_SIZE);
826 tls1_PRF(s->ctx->md5,s->ctx->sha1,
827 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
828 s->session->master_key,buff,sizeof buff);
830 printf ("tls1_generate_master_secret() complete\n");
831 #endif /* KSSL_DEBUG */
832 return(SSL3_MASTER_SECRET_SIZE);
835 int tls1_alert_code(int code)
839 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
840 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
841 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
842 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
843 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
844 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
845 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
846 case SSL_AD_NO_CERTIFICATE: return(-1);
847 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
848 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
849 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
850 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
851 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
852 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
853 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
854 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
855 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
856 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
857 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
858 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
859 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
860 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
861 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
862 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
863 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
864 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
865 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
866 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
867 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
868 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
869 #if 0 /* not appropriate for TLS, not used for DTLS */
870 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
871 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);