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) 1998-2002 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).
113 #include "ssl_locl.h"
114 #ifndef OPENSSL_NO_COMP
115 #include <openssl/comp.h>
117 #include <openssl/evp.h>
118 #include <openssl/hmac.h>
119 #include <openssl/md5.h>
121 #include <openssl/des.h>
124 static void tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
125 int sec_len, unsigned char *seed, int seed_len,
126 unsigned char *out, int olen)
132 unsigned char A1[EVP_MAX_MD_SIZE];
135 chunk=EVP_MD_size(md);
138 HMAC_CTX_init(&ctx_tmp);
139 HMAC_CTX_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
140 HMAC_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
141 HMAC_Init_ex(&ctx,sec,sec_len,md, NULL);
142 HMAC_Init_ex(&ctx_tmp,sec,sec_len,md, NULL);
143 HMAC_Update(&ctx,seed,seed_len);
144 HMAC_Final(&ctx,A1,&A1_len);
148 HMAC_Init_ex(&ctx,NULL,0,NULL,NULL); /* re-init */
149 HMAC_Init_ex(&ctx_tmp,NULL,0,NULL,NULL); /* re-init */
150 HMAC_Update(&ctx,A1,A1_len);
151 HMAC_Update(&ctx_tmp,A1,A1_len);
152 HMAC_Update(&ctx,seed,seed_len);
156 HMAC_Final(&ctx,out,&j);
159 HMAC_Final(&ctx_tmp,A1,&A1_len); /* calc the next A1 value */
163 HMAC_Final(&ctx,A1,&A1_len);
168 HMAC_CTX_cleanup(&ctx);
169 HMAC_CTX_cleanup(&ctx_tmp);
170 OPENSSL_cleanse(A1,sizeof(A1));
173 static void tls1_PRF(const EVP_MD *md5, const EVP_MD *sha1,
174 unsigned char *label, int label_len,
175 const unsigned char *sec, int slen, unsigned char *out1,
176 unsigned char *out2, int olen)
179 const unsigned char *S1,*S2;
184 len+=(slen&1); /* add for odd, make longer */
187 tls1_P_hash(md5 ,S1,len,label,label_len,out1,olen);
188 tls1_P_hash(sha1,S2,len,label,label_len,out2,olen);
190 for (i=0; i<olen; i++)
194 static void tls1_generate_key_block(SSL *s, unsigned char *km,
195 unsigned char *tmp, int num)
198 unsigned char buf[SSL3_RANDOM_SIZE*2+
199 TLS_MD_MAX_CONST_SIZE];
202 memcpy(p,TLS_MD_KEY_EXPANSION_CONST,
203 TLS_MD_KEY_EXPANSION_CONST_SIZE);
204 p+=TLS_MD_KEY_EXPANSION_CONST_SIZE;
205 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
207 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
210 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),
211 s->session->master_key,s->session->master_key_length,
214 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
215 s->session->master_key_length);
218 for (i=0; i < s->session->master_key_length; i++)
220 printf("%02X", s->session->master_key[i]);
223 #endif /* KSSL_DEBUG */
226 int tls1_change_cipher_state(SSL *s, int which)
228 static const unsigned char empty[]="";
229 unsigned char *p,*mac_secret;
230 unsigned char *exp_label,buf[TLS_MD_MAX_CONST_SIZE+
232 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
233 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
234 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
235 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
236 unsigned char *ms,*key,*iv;
240 #ifndef OPENSSL_NO_COMP
241 const SSL_COMP *comp;
244 int is_export,n,i,j,k,exp_label_len,cl;
247 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
248 c=s->s3->tmp.new_sym_enc;
249 m=s->s3->tmp.new_hash;
250 #ifndef OPENSSL_NO_COMP
251 comp=s->s3->tmp.new_compression;
255 key_block=s->s3->tmp.key_block;
257 printf("tls1_change_cipher_state(which= %d) w/\n", which);
258 printf("\talg= %ld, comp= %p\n", s->s3->tmp.new_cipher->algorithms,
260 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", (void *)c);
261 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
262 c->nid,c->block_size,c->key_len,c->iv_len);
263 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
266 for (ki=0; ki<s->s3->tmp.key_block_length; ki++)
267 printf("%02x", s->s3->tmp.key_block[ki]); printf("\n");
269 #endif /* KSSL_DEBUG */
271 if (which & SSL3_CC_READ)
273 if (s->enc_read_ctx != NULL)
275 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
278 /* make sure it's intialized in case we exit later with an error */
279 EVP_CIPHER_CTX_init(s->enc_read_ctx);
282 #ifndef OPENSSL_NO_COMP
283 if (s->expand != NULL)
285 COMP_CTX_free(s->expand);
290 s->expand=COMP_CTX_new(comp->method);
291 if (s->expand == NULL)
293 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
296 if (s->s3->rrec.comp == NULL)
297 s->s3->rrec.comp=(unsigned char *)
298 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
299 if (s->s3->rrec.comp == NULL)
303 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
304 if (s->version != DTLS1_VERSION)
305 memset(&(s->s3->read_sequence[0]),0,8);
306 mac_secret= &(s->s3->read_mac_secret[0]);
310 if (s->enc_write_ctx != NULL)
312 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
315 /* make sure it's intialized in case we exit later with an error */
316 EVP_CIPHER_CTX_init(s->enc_write_ctx);
317 dd= s->enc_write_ctx;
319 #ifndef OPENSSL_NO_COMP
320 if (s->compress != NULL)
322 COMP_CTX_free(s->compress);
327 s->compress=COMP_CTX_new(comp->method);
328 if (s->compress == NULL)
330 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
335 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
336 if (s->version != DTLS1_VERSION)
337 memset(&(s->s3->write_sequence[0]),0,8);
338 mac_secret= &(s->s3->write_mac_secret[0]);
342 EVP_CIPHER_CTX_cleanup(dd);
344 p=s->s3->tmp.key_block;
346 cl=EVP_CIPHER_key_length(c);
347 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
348 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
349 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
350 k=EVP_CIPHER_iv_length(c);
351 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
352 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
355 key= &(p[ n]); n+=j+j;
356 iv= &(p[ n]); n+=k+k;
357 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
358 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
364 ms= &(p[ n]); n+=i+j;
365 key= &(p[ n]); n+=j+k;
367 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
368 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
372 if (n > s->s3->tmp.key_block_length)
374 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
378 memcpy(mac_secret,ms,i);
380 printf("which = %04X\nmac key=",which);
381 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
385 /* In here I set both the read and write key/iv to the
386 * same value since only the correct one will be used :-).
389 memcpy(p,exp_label,exp_label_len);
391 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
393 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
395 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(p-buf),key,j,
396 tmp1,tmp2,EVP_CIPHER_key_length(c));
402 memcpy(p,TLS_MD_IV_BLOCK_CONST,
403 TLS_MD_IV_BLOCK_CONST_SIZE);
404 p+=TLS_MD_IV_BLOCK_CONST_SIZE;
405 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
407 memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE);
409 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,p-buf,empty,0,
418 s->session->key_arg_length=0;
422 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
424 for (ki=0; ki<c->key_len; ki++) printf("%02x", key[ki]);
427 for (ki=0; ki<c->iv_len; ki++) printf("%02x", iv[ki]);
430 #endif /* KSSL_DEBUG */
432 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
434 printf("which = %04X\nkey=",which);
435 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
437 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
441 OPENSSL_cleanse(tmp1,sizeof(tmp1));
442 OPENSSL_cleanse(tmp2,sizeof(tmp1));
443 OPENSSL_cleanse(iv1,sizeof(iv1));
444 OPENSSL_cleanse(iv2,sizeof(iv2));
447 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
452 int tls1_setup_key_block(SSL *s)
454 unsigned char *p1,*p2;
461 printf ("tls1_setup_key_block()\n");
462 #endif /* KSSL_DEBUG */
464 if (s->s3->tmp.key_block_length != 0)
467 if (!ssl_cipher_get_evp(s->session,&c,&hash,&comp))
469 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
473 s->s3->tmp.new_sym_enc=c;
474 s->s3->tmp.new_hash=hash;
476 num=EVP_CIPHER_key_length(c)+EVP_MD_size(hash)+EVP_CIPHER_iv_length(c);
479 ssl3_cleanup_key_block(s);
481 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
483 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
486 s->s3->tmp.key_block_length=num;
487 s->s3->tmp.key_block=p1;
491 printf("client random\n");
492 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
493 printf("server random\n");
494 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
495 printf("pre-master\n");
496 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
498 tls1_generate_key_block(s,p1,p2,num);
499 OPENSSL_cleanse(p2,num);
502 printf("\nkey block\n");
503 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
506 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
508 /* enable vulnerability countermeasure for CBC ciphers with
509 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
511 s->s3->need_empty_fragments = 1;
513 if (s->session->cipher != NULL)
515 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_eNULL)
516 s->s3->need_empty_fragments = 0;
518 #ifndef OPENSSL_NO_RC4
519 if ((s->session->cipher->algorithms & SSL_ENC_MASK) == SSL_RC4)
520 s->s3->need_empty_fragments = 0;
527 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
531 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
534 * 0: (in non-constant time) if the record is publically invalid (i.e. too
536 * 1: if the record's padding is valid / the encryption was successful.
537 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
538 * an internal error occured.
540 int tls1_enc(SSL *s, int send)
545 int bs,i,j,k,pad=0,ret,mac_size=0;
546 const EVP_CIPHER *enc;
552 if (s->enc_write_ctx == NULL)
555 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
561 if (s->enc_read_ctx == NULL)
564 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
568 printf("tls1_enc(%d)\n", send);
569 #endif /* KSSL_DEBUG */
571 if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
573 memmove(rec->data,rec->input,rec->length);
574 rec->input=rec->data;
580 bs=EVP_CIPHER_block_size(ds->cipher);
582 if ((bs != 1) && send)
586 /* Add weird padding of upto 256 bytes */
588 /* we need to add 'i' padding bytes of value j */
590 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
592 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
595 for (k=(int)l; k<(int)(l+i); k++)
604 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
605 ds,rec->data,rec->input,l);
606 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
607 ds->buf_len, ds->cipher->key_len,
608 DES_KEY_SZ, DES_SCHEDULE_SZ,
611 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
613 printf("\trec->input=");
614 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
617 #endif /* KSSL_DEBUG */
621 if (l == 0 || l%bs != 0)
625 EVP_Cipher(ds,rec->data,rec->input,l);
630 printf("\trec->data=");
631 for (ki=0; ki<l; i++)
632 printf(" %02x", rec->data[ki]); printf("\n");
634 #endif /* KSSL_DEBUG */
637 if (s->read_hash != NULL)
638 mac_size = EVP_MD_size(s->read_hash);
639 if ((bs != 1) && !send)
640 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
647 int tls1_cert_verify_mac(SSL *s, EVP_MD_CTX *in_ctx, unsigned char *out)
652 EVP_MD_CTX_init(&ctx);
653 EVP_MD_CTX_copy_ex(&ctx,in_ctx);
654 EVP_DigestFinal_ex(&ctx,out,&ret);
655 EVP_MD_CTX_cleanup(&ctx);
659 int tls1_final_finish_mac(SSL *s, EVP_MD_CTX *in1_ctx, EVP_MD_CTX *in2_ctx,
660 const char *str, int slen, unsigned char *out)
664 unsigned char buf[TLS_MD_MAX_CONST_SIZE+MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
665 unsigned char *q,buf2[12];
671 EVP_MD_CTX_init(&ctx);
672 EVP_MD_CTX_copy_ex(&ctx,in1_ctx);
673 EVP_DigestFinal_ex(&ctx,q,&i);
675 EVP_MD_CTX_copy_ex(&ctx,in2_ctx);
676 EVP_DigestFinal_ex(&ctx,q,&i);
679 tls1_PRF(s->ctx->md5,s->ctx->sha1,buf,(int)(q-buf),
680 s->session->master_key,s->session->master_key_length,
681 out,buf2,sizeof buf2);
682 EVP_MD_CTX_cleanup(&ctx);
687 int tls1_mac(SSL *ssl, unsigned char *md, int send)
690 unsigned char *mac_sec,*seq;
695 unsigned char header[13];
699 rec= &(ssl->s3->wrec);
700 mac_sec= &(ssl->s3->write_mac_secret[0]);
701 seq= &(ssl->s3->write_sequence[0]);
702 hash=ssl->write_hash;
706 rec= &(ssl->s3->rrec);
707 mac_sec= &(ssl->s3->read_mac_secret[0]);
708 seq= &(ssl->s3->read_sequence[0]);
712 md_size=EVP_MD_size(hash);
714 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
715 HMAC_CTX_init(&hmac);
716 HMAC_Init_ex(&hmac,mac_sec,EVP_MD_size(hash),hash,NULL);
718 if (ssl->version == DTLS1_BAD_VER ||
719 (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER))
721 unsigned char dtlsseq[8],*p=dtlsseq;
722 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
723 memcpy (p,&seq[2],6);
725 memcpy(header, dtlsseq, 8);
728 memcpy(header, seq, 8);
731 header[9]=(unsigned char)(ssl->version>>8);
732 header[10]=(unsigned char)(ssl->version);
733 header[11]=(rec->length)>>8;
734 header[12]=(rec->length)&0xff;
737 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
738 ssl3_cbc_record_digest_supported(hash))
740 /* This is a CBC-encrypted record. We must avoid leaking any
741 * timing-side channel information about how many blocks of
742 * data we are hashing because that gives an attacker a
744 ssl3_cbc_digest_record(
748 rec->length + md_size, rec->orig_len,
749 ssl->s3->read_mac_secret,
750 EVP_MD_size(ssl->read_hash),
757 HMAC_Update(&hmac,header,sizeof(header));
758 HMAC_Update(&hmac,rec->input,rec->length);
759 HMAC_Final(&hmac,md,&mds);
763 HMAC_CTX_cleanup(&hmac);
766 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
768 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
770 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
772 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
775 if ( SSL_version(ssl) != DTLS1_VERSION && SSL_version(ssl) != DTLS1_BAD_VER)
780 if (seq[i] != 0) break;
785 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
790 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
793 unsigned char buf[SSL3_RANDOM_SIZE*2+TLS_MD_MASTER_SECRET_CONST_SIZE];
794 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
797 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", (void *)s,out, p,len);
798 #endif /* KSSL_DEBUG */
800 /* Setup the stuff to munge */
801 memcpy(buf,TLS_MD_MASTER_SECRET_CONST,
802 TLS_MD_MASTER_SECRET_CONST_SIZE);
803 memcpy(&(buf[TLS_MD_MASTER_SECRET_CONST_SIZE]),
804 s->s3->client_random,SSL3_RANDOM_SIZE);
805 memcpy(&(buf[SSL3_RANDOM_SIZE+TLS_MD_MASTER_SECRET_CONST_SIZE]),
806 s->s3->server_random,SSL3_RANDOM_SIZE);
807 tls1_PRF(s->ctx->md5,s->ctx->sha1,
808 buf,TLS_MD_MASTER_SECRET_CONST_SIZE+SSL3_RANDOM_SIZE*2,p,len,
809 s->session->master_key,buff,sizeof buff);
811 printf ("tls1_generate_master_secret() complete\n");
812 #endif /* KSSL_DEBUG */
813 return(SSL3_MASTER_SECRET_SIZE);
816 int tls1_alert_code(int code)
820 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
821 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
822 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
823 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
824 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
825 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
826 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
827 case SSL_AD_NO_CERTIFICATE: return(-1);
828 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
829 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
830 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
831 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
832 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
833 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
834 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
835 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
836 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
837 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
838 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
839 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
840 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
841 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
842 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
843 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
844 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
845 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
846 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);