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 #ifndef OPENSSL_NO_COMP
141 #include <openssl/comp.h>
143 #include <openssl/evp.h>
144 #include <openssl/hmac.h>
145 #include <openssl/md5.h>
146 #include <openssl/rand.h>
148 #include <openssl/des.h>
151 /* seed1 through seed5 are virtually concatenated */
152 static int tls1_P_hash(const EVP_MD *md, const unsigned char *sec,
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)
163 EVP_MD_CTX ctx, ctx_tmp, ctx_init;
165 unsigned char A1[EVP_MAX_MD_SIZE];
169 chunk=EVP_MD_size(md);
170 OPENSSL_assert(chunk >= 0);
172 EVP_MD_CTX_init(&ctx);
173 EVP_MD_CTX_init(&ctx_tmp);
174 EVP_MD_CTX_init(&ctx_init);
175 EVP_MD_CTX_set_flags(&ctx_init, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176 mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
179 if (!EVP_DigestSignInit(&ctx_init,NULL,md, NULL, mac_key))
181 if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
183 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
185 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
187 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
189 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
191 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
193 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
198 /* Reinit mac contexts */
199 if (!EVP_MD_CTX_copy_ex(&ctx,&ctx_init))
201 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
203 if (olen>chunk && !EVP_MD_CTX_copy_ex(&ctx_tmp,&ctx))
205 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
207 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
209 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
211 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
213 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
218 if (!EVP_DigestSignFinal(&ctx,out,&j))
222 /* calc the next A1 value */
223 if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
228 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
236 EVP_PKEY_free(mac_key);
237 EVP_MD_CTX_cleanup(&ctx);
238 EVP_MD_CTX_cleanup(&ctx_tmp);
239 EVP_MD_CTX_cleanup(&ctx_init);
240 OPENSSL_cleanse(A1,sizeof(A1));
244 /* seed1 through seed5 are virtually concatenated */
245 static int tls1_PRF(long digest_mask,
246 const void *seed1, int seed1_len,
247 const void *seed2, int seed2_len,
248 const void *seed3, int seed3_len,
249 const void *seed4, int seed4_len,
250 const void *seed5, int seed5_len,
251 const unsigned char *sec, int slen,
253 unsigned char *out2, int olen)
256 const unsigned char *S1;
261 /* Count number of digests and partition sec evenly */
263 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
264 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
271 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
272 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
274 SSLerr(SSL_F_TLS1_PRF,
275 SSL_R_UNSUPPORTED_DIGEST_TYPE);
278 if (!tls1_P_hash(md ,S1,len+(slen&1),
279 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
283 for (i=0; i<olen; i++)
293 static int tls1_generate_key_block(SSL *s, unsigned char *km,
294 unsigned char *tmp, int num)
297 ret = tls1_PRF(ssl_get_algorithm2(s),
298 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
299 s->s3->server_random,SSL3_RANDOM_SIZE,
300 s->s3->client_random,SSL3_RANDOM_SIZE,
302 s->session->master_key,s->session->master_key_length,
305 fprintf(stderr,"tls1_generate_key_block() ==> %d byte master_key =\n\t",
306 s->session->master_key_length);
309 for (i=0; i < s->session->master_key_length; i++)
311 fprintf(stderr,"%02X", s->session->master_key[i]);
313 fprintf(stderr,"\n"); }
314 #endif /* KSSL_DEBUG */
318 int tls1_change_cipher_state(SSL *s, int which)
320 static const unsigned char empty[]="";
321 unsigned char *p,*mac_secret;
322 unsigned char *exp_label;
323 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
324 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
325 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
326 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
327 unsigned char *ms,*key,*iv;
331 #ifndef OPENSSL_NO_COMP
332 const SSL_COMP *comp;
336 int *mac_secret_size;
339 int is_export,n,i,j,k,exp_label_len,cl;
342 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
343 c=s->s3->tmp.new_sym_enc;
344 m=s->s3->tmp.new_hash;
345 mac_type = s->s3->tmp.new_mac_pkey_type;
346 #ifndef OPENSSL_NO_COMP
347 comp=s->s3->tmp.new_compression;
351 fprintf(stderr,"tls1_change_cipher_state(which= %d) w/\n", which);
352 fprintf(stderr,"\talg= %ld/%ld, comp= %p\n",
353 s->s3->tmp.new_cipher->algorithm_mkey,
354 s->s3->tmp.new_cipher->algorithm_auth,
356 fprintf(stderr,"\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
357 fprintf(stderr,"\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
358 c->nid,c->block_size,c->key_len,c->iv_len);
359 fprintf(stderr,"\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
362 for (i=0; i<s->s3->tmp.key_block_length; i++)
363 fprintf(stderr,"%02x", s->s3->tmp.key_block[i]); fprintf(stderr,"\n");
365 #endif /* KSSL_DEBUG */
367 if (which & SSL3_CC_READ)
369 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
370 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
372 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
374 if (s->enc_read_ctx != NULL)
376 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
379 /* make sure it's intialized in case we exit later with an error */
380 EVP_CIPHER_CTX_init(s->enc_read_ctx);
382 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
383 #ifndef OPENSSL_NO_COMP
384 if (s->expand != NULL)
386 COMP_CTX_free(s->expand);
391 s->expand=COMP_CTX_new(comp->method);
392 if (s->expand == NULL)
394 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
397 if (s->s3->rrec.comp == NULL)
398 s->s3->rrec.comp=(unsigned char *)
399 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
400 if (s->s3->rrec.comp == NULL)
404 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
405 if (s->version != DTLS1_VERSION)
406 memset(&(s->s3->read_sequence[0]),0,8);
407 mac_secret= &(s->s3->read_mac_secret[0]);
408 mac_secret_size=&(s->s3->read_mac_secret_size);
412 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
413 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
415 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
416 if (s->enc_write_ctx != NULL && !SSL_IS_DTLS(s))
418 else if ((s->enc_write_ctx=EVP_CIPHER_CTX_new()) == NULL)
420 dd= s->enc_write_ctx;
423 mac_ctx = EVP_MD_CTX_create();
426 s->write_hash = mac_ctx;
429 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
430 #ifndef OPENSSL_NO_COMP
431 if (s->compress != NULL)
433 COMP_CTX_free(s->compress);
438 s->compress=COMP_CTX_new(comp->method);
439 if (s->compress == NULL)
441 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
446 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
447 if (s->version != DTLS1_VERSION)
448 memset(&(s->s3->write_sequence[0]),0,8);
449 mac_secret= &(s->s3->write_mac_secret[0]);
450 mac_secret_size = &(s->s3->write_mac_secret_size);
454 EVP_CIPHER_CTX_cleanup(dd);
456 p=s->s3->tmp.key_block;
457 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
459 cl=EVP_CIPHER_key_length(c);
460 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
461 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
462 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
463 /* If GCM mode only part of IV comes from PRF */
464 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
465 k = EVP_GCM_TLS_FIXED_IV_LEN;
467 k=EVP_CIPHER_iv_length(c);
468 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
469 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
472 key= &(p[ n]); n+=j+j;
473 iv= &(p[ n]); n+=k+k;
474 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
475 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
481 ms= &(p[ n]); n+=i+j;
482 key= &(p[ n]); n+=j+k;
484 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
485 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
489 if (n > s->s3->tmp.key_block_length)
491 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
495 memcpy(mac_secret,ms,i);
497 if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
499 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
500 mac_secret,*mac_secret_size);
501 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
502 EVP_PKEY_free(mac_key);
505 printf("which = %04X\nmac key=",which);
506 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
510 /* In here I set both the read and write key/iv to the
511 * same value since only the correct one will be used :-).
513 if (!tls1_PRF(ssl_get_algorithm2(s),
514 exp_label,exp_label_len,
515 s->s3->client_random,SSL3_RANDOM_SIZE,
516 s->s3->server_random,SSL3_RANDOM_SIZE,
518 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
524 if (!tls1_PRF(ssl_get_algorithm2(s),
525 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
526 s->s3->client_random,SSL3_RANDOM_SIZE,
527 s->s3->server_random,SSL3_RANDOM_SIZE,
529 empty,0,iv1,iv2,k*2))
538 s->session->key_arg_length=0;
542 fprintf(stderr,"EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
543 fprintf(stderr,"\tkey= "); for (i=0; i<c->key_len; i++) fprintf(stderr,"%02x", key[i]);
544 fprintf(stderr,"\n");
545 fprintf(stderr,"\t iv= "); for (i=0; i<c->iv_len; i++) fprintf(stderr,"%02x", iv[i]);
546 fprintf(stderr,"\n");
548 #endif /* KSSL_DEBUG */
550 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
552 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
553 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
556 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
558 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
559 if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
560 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
561 *mac_secret_size,mac_secret);
563 #ifdef OPENSSL_SSL_TRACE_CRYPTO
566 int wh = which & SSL3_CC_WRITE ? TLS1_RT_CRYPTO_WRITE : 0;
567 if (*mac_secret_size)
568 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_MAC,
569 mac_secret, *mac_secret_size,
570 s, s->msg_callback_arg);
572 s->msg_callback(2, s->version, wh | TLS1_RT_CRYPTO_KEY,
574 s, s->msg_callback_arg);
577 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
578 wh |= TLS1_RT_CRYPTO_FIXED_IV;
580 wh |= TLS1_RT_CRYPTO_IV;
581 s->msg_callback(2, s->version, wh, iv, k,
582 s, s->msg_callback_arg);
588 printf("which = %04X\nkey=",which);
589 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
591 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
595 OPENSSL_cleanse(tmp1,sizeof(tmp1));
596 OPENSSL_cleanse(tmp2,sizeof(tmp1));
597 OPENSSL_cleanse(iv1,sizeof(iv1));
598 OPENSSL_cleanse(iv2,sizeof(iv2));
601 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
606 int tls1_setup_key_block(SSL *s)
608 unsigned char *p1,*p2=NULL;
613 int mac_type= NID_undef,mac_secret_size=0;
617 fprintf(stderr,"tls1_setup_key_block()\n");
618 #endif /* KSSL_DEBUG */
620 if (s->s3->tmp.key_block_length != 0)
623 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
625 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
629 s->s3->tmp.new_sym_enc=c;
630 s->s3->tmp.new_hash=hash;
631 s->s3->tmp.new_mac_pkey_type = mac_type;
632 s->s3->tmp.new_mac_secret_size = mac_secret_size;
633 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
636 ssl3_cleanup_key_block(s);
638 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
640 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
644 s->s3->tmp.key_block_length=num;
645 s->s3->tmp.key_block=p1;
647 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
649 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
654 printf("client random\n");
655 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
656 printf("server random\n");
657 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
658 printf("pre-master\n");
659 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
661 if (!tls1_generate_key_block(s,p1,p2,num))
664 printf("\nkey block\n");
665 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
668 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
669 && s->method->version <= TLS1_VERSION)
671 /* enable vulnerability countermeasure for CBC ciphers with
672 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
674 s->s3->need_empty_fragments = 1;
676 if (s->session->cipher != NULL)
678 if (s->session->cipher->algorithm_enc == SSL_eNULL)
679 s->s3->need_empty_fragments = 0;
681 #ifndef OPENSSL_NO_RC4
682 if (s->session->cipher->algorithm_enc == SSL_RC4)
683 s->s3->need_empty_fragments = 0;
692 OPENSSL_cleanse(p2,num);
699 * tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
702 * 0: (in non-constant time) if the record is publically invalid (i.e. too
704 * 1: if the record's padding is valid / the encryption was successful.
705 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
706 * an internal error occured.
708 int tls1_enc(SSL *s, int send)
713 int bs,i,j,k,pad=0,ret,mac_size=0;
714 const EVP_CIPHER *enc;
718 if (EVP_MD_CTX_md(s->write_hash))
720 int n=EVP_MD_CTX_size(s->write_hash);
721 OPENSSL_assert(n >= 0);
725 if (s->enc_write_ctx == NULL)
730 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
731 /* For TLSv1.1 and later explicit IV */
732 if (SSL_USE_EXPLICIT_IV(s)
733 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
734 ivlen = EVP_CIPHER_iv_length(enc);
739 if ( rec->data != rec->input)
740 /* we can't write into the input stream:
741 * Can this ever happen?? (steve)
744 "%s:%d: rec->data != rec->input\n",
746 else if (RAND_bytes(rec->input, ivlen) <= 0)
753 if (EVP_MD_CTX_md(s->read_hash))
755 int n=EVP_MD_CTX_size(s->read_hash);
756 OPENSSL_assert(n >= 0);
760 if (s->enc_read_ctx == NULL)
763 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
767 fprintf(stderr,"tls1_enc(%d)\n", send);
768 #endif /* KSSL_DEBUG */
770 if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
772 memmove(rec->data,rec->input,rec->length);
773 rec->input=rec->data;
779 bs=EVP_CIPHER_block_size(ds->cipher);
781 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
783 unsigned char buf[13],*seq;
785 seq = send?s->s3->write_sequence:s->s3->read_sequence;
789 unsigned char dtlsseq[9],*p=dtlsseq;
791 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
793 memcpy(buf,dtlsseq,8);
798 for (i=7; i>=0; i--) /* increment */
801 if (seq[i] != 0) break;
806 buf[9]=(unsigned char)(s->version>>8);
807 buf[10]=(unsigned char)(s->version);
808 buf[11]=rec->length>>8;
809 buf[12]=rec->length&0xff;
810 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
817 else if ((bs != 1) && send)
821 /* Add weird padding of upto 256 bytes */
823 /* we need to add 'i' padding bytes of value j */
825 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
827 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
830 for (k=(int)l; k<(int)(l+i); k++)
839 fprintf(stderr,"EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
840 ds,rec->data,rec->input,l);
841 fprintf(stderr,"\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%lu %lu], %d iv_len\n",
842 ds->buf_len, ds->cipher->key_len,
843 DES_KEY_SZ, DES_SCHEDULE_SZ,
845 fprintf(stderr,"\t\tIV: ");
846 for (i=0; i<ds->cipher->iv_len; i++) fprintf(stderr,"%02X", ds->iv[i]);
847 fprintf(stderr,"\n");
848 fprintf(stderr,"\trec->input=");
849 for (ui=0; ui<l; ui++) fprintf(stderr," %02x", rec->input[ui]);
850 fprintf(stderr,"\n");
852 #endif /* KSSL_DEBUG */
856 if (l == 0 || l%bs != 0)
860 i = EVP_Cipher(ds,rec->data,rec->input,l);
861 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
864 return -1; /* AEAD can fail to verify MAC */
865 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
867 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
868 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
869 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
875 fprintf(stderr,"\trec->data=");
877 fprintf(stderr," %02x", rec->data[i]); fprintf(stderr,"\n");
879 #endif /* KSSL_DEBUG */
882 if (EVP_MD_CTX_md(s->read_hash) != NULL)
883 mac_size = EVP_MD_CTX_size(s->read_hash);
884 if ((bs != 1) && !send)
885 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
892 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
895 EVP_MD_CTX ctx, *d=NULL;
898 if (s->s3->handshake_buffer)
899 if (!ssl3_digest_cached_records(s))
902 for (i=0;i<SSL_MAX_DIGEST;i++)
904 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
906 d=s->s3->handshake_dgst[i];
911 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
915 EVP_MD_CTX_init(&ctx);
916 EVP_MD_CTX_copy_ex(&ctx,d);
917 EVP_DigestFinal_ex(&ctx,out,&ret);
918 EVP_MD_CTX_cleanup(&ctx);
922 int tls1_final_finish_mac(SSL *s,
923 const char *str, int slen, unsigned char *out)
927 unsigned char buf[2*EVP_MAX_MD_SIZE];
928 unsigned char *q,buf2[12];
936 if (s->s3->handshake_buffer)
937 if (!ssl3_digest_cached_records(s))
940 EVP_MD_CTX_init(&ctx);
942 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
944 if (mask & ssl_get_algorithm2(s))
946 int hashsize = EVP_MD_size(md);
947 EVP_MD_CTX *hdgst = s->s3->handshake_dgst[idx];
948 if (!hdgst || hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
950 /* internal error: 'buf' is too small for this cipersuite! */
955 if (!EVP_MD_CTX_copy_ex(&ctx, hdgst) ||
956 !EVP_DigestFinal_ex(&ctx,q,&i) ||
957 (i != (unsigned int)hashsize))
964 if (!tls1_PRF(ssl_get_algorithm2(s),
965 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
966 s->session->master_key,s->session->master_key_length,
967 out,buf2,sizeof buf2))
969 EVP_MD_CTX_cleanup(&ctx);
977 int tls1_mac(SSL *ssl, unsigned char *md, int send)
982 size_t md_size, orig_len;
984 EVP_MD_CTX hmac, *mac_ctx;
985 unsigned char header[13];
986 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
991 rec= &(ssl->s3->wrec);
992 seq= &(ssl->s3->write_sequence[0]);
993 hash=ssl->write_hash;
997 rec= &(ssl->s3->rrec);
998 seq= &(ssl->s3->read_sequence[0]);
1002 t=EVP_MD_CTX_size(hash);
1003 OPENSSL_assert(t >= 0);
1006 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
1013 if (!EVP_MD_CTX_copy(&hmac,hash))
1018 if (SSL_IS_DTLS(ssl))
1020 unsigned char dtlsseq[8],*p=dtlsseq;
1022 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
1023 memcpy (p,&seq[2],6);
1025 memcpy(header, dtlsseq, 8);
1028 memcpy(header, seq, 8);
1030 /* kludge: tls1_cbc_remove_padding passes padding length in rec->type */
1031 orig_len = rec->length+md_size+((unsigned int)rec->type>>8);
1034 header[8]=rec->type;
1035 header[9]=(unsigned char)(ssl->version>>8);
1036 header[10]=(unsigned char)(ssl->version);
1037 header[11]=(rec->length)>>8;
1038 header[12]=(rec->length)&0xff;
1041 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1042 ssl3_cbc_record_digest_supported(mac_ctx))
1044 /* This is a CBC-encrypted record. We must avoid leaking any
1045 * timing-side channel information about how many blocks of
1046 * data we are hashing because that gives an attacker a
1048 /* Final param == not SSLv3 */
1049 ssl3_cbc_digest_record(
1053 rec->length + md_size, orig_len,
1054 ssl->s3->read_mac_secret,
1055 ssl->s3->read_mac_secret_size,
1060 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1061 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1062 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1063 OPENSSL_assert(t > 0);
1065 if (!send && FIPS_mode())
1066 tls_fips_digest_extra(
1068 mac_ctx, rec->input,
1069 rec->length, orig_len);
1074 EVP_MD_CTX_cleanup(&hmac);
1076 fprintf(stderr,"seq=");
1077 {int z; for (z=0; z<8; z++) fprintf(stderr,"%02X ",seq[z]); fprintf(stderr,"\n"); }
1078 fprintf(stderr,"rec=");
1079 {unsigned int z; for (z=0; z<rec->length; z++) fprintf(stderr,"%02X ",rec->data[z]); fprintf(stderr,"\n"); }
1082 if (!SSL_IS_DTLS(ssl))
1084 for (i=7; i>=0; i--)
1087 if (seq[i] != 0) break;
1092 {unsigned int z; for (z=0; z<md_size; z++) fprintf(stderr,"%02X ",md[z]); fprintf(stderr,"\n"); }
1097 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1100 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1101 const void *co = NULL, *so = NULL;
1102 int col = 0, sol = 0;
1106 fprintf(stderr,"tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1107 #endif /* KSSL_DEBUG */
1109 #ifdef TLSEXT_TYPE_opaque_prf_input
1110 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1111 s->s3->client_opaque_prf_input_len > 0 &&
1112 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1114 co = s->s3->client_opaque_prf_input;
1115 col = s->s3->server_opaque_prf_input_len;
1116 so = s->s3->server_opaque_prf_input;
1117 /* must be same as col (see draft-rescorla-tls-opaque-prf-input-00.txt, section 3.1) */
1118 sol = s->s3->client_opaque_prf_input_len;
1122 tls1_PRF(ssl_get_algorithm2(s),
1123 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1124 s->s3->client_random,SSL3_RANDOM_SIZE,
1126 s->s3->server_random,SSL3_RANDOM_SIZE,
1129 s->session->master_key,buff,sizeof buff);
1131 fprintf(stderr, "Premaster Secret:\n");
1132 BIO_dump_fp(stderr, (char *)p, len);
1133 fprintf(stderr, "Client Random:\n");
1134 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1135 fprintf(stderr, "Server Random:\n");
1136 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1137 fprintf(stderr, "Master Secret:\n");
1138 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1141 #ifdef OPENSSL_SSL_TRACE_CRYPTO
1142 if (s->msg_callback)
1144 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_PREMASTER,
1145 p, len, s, s->msg_callback_arg);
1146 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_CLIENT_RANDOM,
1147 s->s3->client_random, SSL3_RANDOM_SIZE,
1148 s, s->msg_callback_arg);
1149 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_SERVER_RANDOM,
1150 s->s3->server_random, SSL3_RANDOM_SIZE,
1151 s, s->msg_callback_arg);
1152 s->msg_callback(2, s->version, TLS1_RT_CRYPTO_MASTER,
1153 s->session->master_key,
1154 SSL3_MASTER_SECRET_SIZE,
1155 s, s->msg_callback_arg);
1160 fprintf(stderr,"tls1_generate_master_secret() complete\n");
1161 #endif /* KSSL_DEBUG */
1162 return(SSL3_MASTER_SECRET_SIZE);
1165 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1166 const char *label, size_t llen, const unsigned char *context,
1167 size_t contextlen, int use_context)
1169 unsigned char *buff;
1170 unsigned char *val = NULL;
1171 size_t vallen, currentvalpos;
1175 fprintf(stderr,"tls1_export_keying_material(%p,%p,%lu,%s,%lu,%p,%lu)\n", s, out, olen, label, llen, context, contextlen);
1176 #endif /* KSSL_DEBUG */
1178 buff = OPENSSL_malloc(olen);
1179 if (buff == NULL) goto err2;
1181 /* construct PRF arguments
1182 * we construct the PRF argument ourself rather than passing separate
1183 * values into the TLS PRF to ensure that the concatenation of values
1184 * does not create a prohibited label.
1186 vallen = llen + SSL3_RANDOM_SIZE * 2;
1189 vallen += 2 + contextlen;
1192 val = OPENSSL_malloc(vallen);
1193 if (val == NULL) goto err2;
1195 memcpy(val + currentvalpos, (unsigned char *) label, llen);
1196 currentvalpos += llen;
1197 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1198 currentvalpos += SSL3_RANDOM_SIZE;
1199 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1200 currentvalpos += SSL3_RANDOM_SIZE;
1204 val[currentvalpos] = (contextlen >> 8) & 0xff;
1206 val[currentvalpos] = contextlen & 0xff;
1208 if ((contextlen > 0) || (context != NULL))
1210 memcpy(val + currentvalpos, context, contextlen);
1214 /* disallow prohibited labels
1215 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1216 * 15, so size of val > max(prohibited label len) = 15 and the
1217 * comparisons won't have buffer overflow
1219 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1220 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1221 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1222 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1223 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1224 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1225 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1226 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1228 rv = tls1_PRF(ssl_get_algorithm2(s),
1234 s->session->master_key,s->session->master_key_length,
1238 fprintf(stderr,"tls1_export_keying_material() complete\n");
1239 #endif /* KSSL_DEBUG */
1242 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1246 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1249 if (buff != NULL) OPENSSL_free(buff);
1250 if (val != NULL) OPENSSL_free(val);
1254 int tls1_alert_code(int code)
1258 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1259 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1260 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1261 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1262 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1263 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1264 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1265 case SSL_AD_NO_CERTIFICATE: return(-1);
1266 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1267 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1268 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1269 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1270 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1271 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1272 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1273 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1274 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1275 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1276 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1277 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1278 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1279 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1280 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1281 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1282 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1283 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1284 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1285 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1286 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1287 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1288 case SSL_AD_INAPPROPRIATE_FALLBACK:return(TLS1_AD_INAPPROPRIATE_FALLBACK);
1290 /* not appropriate for TLS, not used for DTLS */
1291 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1292 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1294 default: return(-1);