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;
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_set_flags(&ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
175 EVP_MD_CTX_set_flags(&ctx_tmp, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
176 mac_key = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, sec, sec_len);
179 if (!EVP_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
181 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
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_DigestSignInit(&ctx,NULL,md, NULL, mac_key))
201 if (!EVP_DigestSignInit(&ctx_tmp,NULL,md, NULL, mac_key))
203 if (!EVP_DigestSignUpdate(&ctx,A1,A1_len))
205 if (!EVP_DigestSignUpdate(&ctx_tmp,A1,A1_len))
207 if (seed1 && !EVP_DigestSignUpdate(&ctx,seed1,seed1_len))
209 if (seed2 && !EVP_DigestSignUpdate(&ctx,seed2,seed2_len))
211 if (seed3 && !EVP_DigestSignUpdate(&ctx,seed3,seed3_len))
213 if (seed4 && !EVP_DigestSignUpdate(&ctx,seed4,seed4_len))
215 if (seed5 && !EVP_DigestSignUpdate(&ctx,seed5,seed5_len))
220 if (!EVP_DigestSignFinal(&ctx,out,&j))
224 /* calc the next A1 value */
225 if (!EVP_DigestSignFinal(&ctx_tmp,A1,&A1_len))
230 if (!EVP_DigestSignFinal(&ctx,A1,&A1_len))
238 EVP_PKEY_free(mac_key);
239 EVP_MD_CTX_cleanup(&ctx);
240 EVP_MD_CTX_cleanup(&ctx_tmp);
241 OPENSSL_cleanse(A1,sizeof(A1));
245 /* seed1 through seed5 are virtually concatenated */
246 static int tls1_PRF(long digest_mask,
247 const void *seed1, int seed1_len,
248 const void *seed2, int seed2_len,
249 const void *seed3, int seed3_len,
250 const void *seed4, int seed4_len,
251 const void *seed5, int seed5_len,
252 const unsigned char *sec, int slen,
254 unsigned char *out2, int olen)
257 const unsigned char *S1;
262 /* Count number of digests and partition sec evenly */
264 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
265 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) count++;
272 for (idx=0;ssl_get_handshake_digest(idx,&m,&md);idx++) {
273 if ((m<<TLS1_PRF_DGST_SHIFT) & digest_mask) {
275 SSLerr(SSL_F_TLS1_PRF,
276 SSL_R_UNSUPPORTED_DIGEST_TYPE);
279 if (!tls1_P_hash(md ,S1,len+(slen&1),
280 seed1,seed1_len,seed2,seed2_len,seed3,seed3_len,seed4,seed4_len,seed5,seed5_len,
284 for (i=0; i<olen; i++)
294 static int tls1_generate_key_block(SSL *s, unsigned char *km,
295 unsigned char *tmp, int num)
298 ret = tls1_PRF(ssl_get_algorithm2(s),
299 TLS_MD_KEY_EXPANSION_CONST,TLS_MD_KEY_EXPANSION_CONST_SIZE,
300 s->s3->server_random,SSL3_RANDOM_SIZE,
301 s->s3->client_random,SSL3_RANDOM_SIZE,
303 s->session->master_key,s->session->master_key_length,
306 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
307 s->session->master_key_length);
310 for (i=0; i < s->session->master_key_length; i++)
312 printf("%02X", s->session->master_key[i]);
315 #endif /* KSSL_DEBUG */
319 int tls1_change_cipher_state(SSL *s, int which)
321 static const unsigned char empty[]="";
322 unsigned char *p,*mac_secret;
323 unsigned char *exp_label;
324 unsigned char tmp1[EVP_MAX_KEY_LENGTH];
325 unsigned char tmp2[EVP_MAX_KEY_LENGTH];
326 unsigned char iv1[EVP_MAX_IV_LENGTH*2];
327 unsigned char iv2[EVP_MAX_IV_LENGTH*2];
328 unsigned char *ms,*key,*iv;
332 #ifndef OPENSSL_NO_COMP
333 const SSL_COMP *comp;
337 int *mac_secret_size;
340 int is_export,n,i,j,k,exp_label_len,cl;
343 is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);
344 c=s->s3->tmp.new_sym_enc;
345 m=s->s3->tmp.new_hash;
346 mac_type = s->s3->tmp.new_mac_pkey_type;
347 #ifndef OPENSSL_NO_COMP
348 comp=s->s3->tmp.new_compression;
352 printf("tls1_change_cipher_state(which= %d) w/\n", which);
353 printf("\talg= %ld/%ld, comp= %p\n",
354 s->s3->tmp.new_cipher->algorithm_mkey,
355 s->s3->tmp.new_cipher->algorithm_auth,
357 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c);
358 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
359 c->nid,c->block_size,c->key_len,c->iv_len);
360 printf("\tkey_block: len= %d, data= ", s->s3->tmp.key_block_length);
363 for (i=0; i<s->s3->tmp.key_block_length; i++)
364 printf("%02x", s->s3->tmp.key_block[i]); printf("\n");
366 #endif /* KSSL_DEBUG */
368 if (which & SSL3_CC_READ)
370 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
371 s->mac_flags |= SSL_MAC_FLAG_READ_MAC_STREAM;
373 s->mac_flags &= ~SSL_MAC_FLAG_READ_MAC_STREAM;
375 if (s->enc_read_ctx != NULL)
377 else if ((s->enc_read_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
380 /* make sure it's intialized in case we exit later with an error */
381 EVP_CIPHER_CTX_init(s->enc_read_ctx);
383 mac_ctx=ssl_replace_hash(&s->read_hash,NULL);
384 #ifndef OPENSSL_NO_COMP
385 if (s->expand != NULL)
387 COMP_CTX_free(s->expand);
392 s->expand=COMP_CTX_new(comp->method);
393 if (s->expand == NULL)
395 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
398 if (s->s3->rrec.comp == NULL)
399 s->s3->rrec.comp=(unsigned char *)
400 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
401 if (s->s3->rrec.comp == NULL)
405 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
406 if (s->version != DTLS1_VERSION)
407 memset(&(s->s3->read_sequence[0]),0,8);
408 mac_secret= &(s->s3->read_mac_secret[0]);
409 mac_secret_size=&(s->s3->read_mac_secret_size);
413 if (s->s3->tmp.new_cipher->algorithm2 & TLS1_STREAM_MAC)
414 s->mac_flags |= SSL_MAC_FLAG_WRITE_MAC_STREAM;
416 s->mac_flags &= ~SSL_MAC_FLAG_WRITE_MAC_STREAM;
417 if (s->enc_write_ctx != NULL)
419 else if ((s->enc_write_ctx=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX))) == NULL)
422 /* make sure it's intialized in case we exit later with an error */
423 EVP_CIPHER_CTX_init(s->enc_write_ctx);
424 dd= s->enc_write_ctx;
425 mac_ctx = ssl_replace_hash(&s->write_hash,NULL);
426 #ifndef OPENSSL_NO_COMP
427 if (s->compress != NULL)
429 COMP_CTX_free(s->compress);
434 s->compress=COMP_CTX_new(comp->method);
435 if (s->compress == NULL)
437 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,SSL_R_COMPRESSION_LIBRARY_ERROR);
442 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
443 if (s->version != DTLS1_VERSION)
444 memset(&(s->s3->write_sequence[0]),0,8);
445 mac_secret= &(s->s3->write_mac_secret[0]);
446 mac_secret_size = &(s->s3->write_mac_secret_size);
450 EVP_CIPHER_CTX_cleanup(dd);
452 p=s->s3->tmp.key_block;
453 i=*mac_secret_size=s->s3->tmp.new_mac_secret_size;
455 cl=EVP_CIPHER_key_length(c);
456 j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ?
457 cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl;
458 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
459 /* If GCM mode only part of IV comes from PRF */
460 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
461 k = EVP_GCM_TLS_FIXED_IV_LEN;
463 k=EVP_CIPHER_iv_length(c);
464 if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) ||
465 (which == SSL3_CHANGE_CIPHER_SERVER_READ))
468 key= &(p[ n]); n+=j+j;
469 iv= &(p[ n]); n+=k+k;
470 exp_label=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST;
471 exp_label_len=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE;
477 ms= &(p[ n]); n+=i+j;
478 key= &(p[ n]); n+=j+k;
480 exp_label=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST;
481 exp_label_len=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE;
485 if (n > s->s3->tmp.key_block_length)
487 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_INTERNAL_ERROR);
491 memcpy(mac_secret,ms,i);
493 if (!(EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER))
495 mac_key = EVP_PKEY_new_mac_key(mac_type, NULL,
496 mac_secret,*mac_secret_size);
497 EVP_DigestSignInit(mac_ctx,NULL,m,NULL,mac_key);
498 EVP_PKEY_free(mac_key);
501 printf("which = %04X\nmac key=",which);
502 { int z; for (z=0; z<i; z++) printf("%02X%c",ms[z],((z+1)%16)?' ':'\n'); }
506 /* In here I set both the read and write key/iv to the
507 * same value since only the correct one will be used :-).
509 if (!tls1_PRF(ssl_get_algorithm2(s),
510 exp_label,exp_label_len,
511 s->s3->client_random,SSL3_RANDOM_SIZE,
512 s->s3->server_random,SSL3_RANDOM_SIZE,
514 key,j,tmp1,tmp2,EVP_CIPHER_key_length(c)))
520 if (!tls1_PRF(ssl_get_algorithm2(s),
521 TLS_MD_IV_BLOCK_CONST,TLS_MD_IV_BLOCK_CONST_SIZE,
522 s->s3->client_random,SSL3_RANDOM_SIZE,
523 s->s3->server_random,SSL3_RANDOM_SIZE,
525 empty,0,iv1,iv2,k*2))
534 s->session->key_arg_length=0;
538 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
539 printf("\tkey= "); for (i=0; i<c->key_len; i++) printf("%02x", key[i]);
541 printf("\t iv= "); for (i=0; i<c->iv_len; i++) printf("%02x", iv[i]);
544 #endif /* KSSL_DEBUG */
546 if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE)
548 EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE));
549 EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv);
552 EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE));
554 /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */
555 if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size)
556 EVP_CIPHER_CTX_ctrl(dd,EVP_CTRL_AEAD_SET_MAC_KEY,
557 *mac_secret_size,mac_secret);
560 printf("which = %04X\nkey=",which);
561 { int z; for (z=0; z<EVP_CIPHER_key_length(c); z++) printf("%02X%c",key[z],((z+1)%16)?' ':'\n'); }
563 { int z; for (z=0; z<k; z++) printf("%02X%c",iv[z],((z+1)%16)?' ':'\n'); }
567 OPENSSL_cleanse(tmp1,sizeof(tmp1));
568 OPENSSL_cleanse(tmp2,sizeof(tmp1));
569 OPENSSL_cleanse(iv1,sizeof(iv1));
570 OPENSSL_cleanse(iv2,sizeof(iv2));
573 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE,ERR_R_MALLOC_FAILURE);
578 int tls1_setup_key_block(SSL *s)
580 unsigned char *p1,*p2=NULL;
585 int mac_type= NID_undef,mac_secret_size=0;
589 printf ("tls1_setup_key_block()\n");
590 #endif /* KSSL_DEBUG */
592 if (s->s3->tmp.key_block_length != 0)
595 if (!ssl_cipher_get_evp(s->session,&c,&hash,&mac_type,&mac_secret_size,&comp))
597 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,SSL_R_CIPHER_OR_HASH_UNAVAILABLE);
601 s->s3->tmp.new_sym_enc=c;
602 s->s3->tmp.new_hash=hash;
603 s->s3->tmp.new_mac_pkey_type = mac_type;
604 s->s3->tmp.new_mac_secret_size = mac_secret_size;
605 num=EVP_CIPHER_key_length(c)+mac_secret_size+EVP_CIPHER_iv_length(c);
608 ssl3_cleanup_key_block(s);
610 if ((p1=(unsigned char *)OPENSSL_malloc(num)) == NULL)
612 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
616 s->s3->tmp.key_block_length=num;
617 s->s3->tmp.key_block=p1;
619 if ((p2=(unsigned char *)OPENSSL_malloc(num)) == NULL)
621 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK,ERR_R_MALLOC_FAILURE);
626 printf("client random\n");
627 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->client_random[z],((z+1)%16)?' ':'\n'); }
628 printf("server random\n");
629 { int z; for (z=0; z<SSL3_RANDOM_SIZE; z++) printf("%02X%c",s->s3->server_random[z],((z+1)%16)?' ':'\n'); }
630 printf("pre-master\n");
631 { int z; for (z=0; z<s->session->master_key_length; z++) printf("%02X%c",s->session->master_key[z],((z+1)%16)?' ':'\n'); }
633 if (!tls1_generate_key_block(s,p1,p2,num))
636 printf("\nkey block\n");
637 { int z; for (z=0; z<num; z++) printf("%02X%c",p1[z],((z+1)%16)?' ':'\n'); }
640 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)
641 && s->method->version <= TLS1_VERSION)
643 /* enable vulnerability countermeasure for CBC ciphers with
644 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
646 s->s3->need_empty_fragments = 1;
648 if (s->session->cipher != NULL)
650 if (s->session->cipher->algorithm_enc == SSL_eNULL)
651 s->s3->need_empty_fragments = 0;
653 #ifndef OPENSSL_NO_RC4
654 if (s->session->cipher->algorithm_enc == SSL_RC4)
655 s->s3->need_empty_fragments = 0;
664 OPENSSL_cleanse(p2,num);
670 /* tls1_enc encrypts/decrypts the record in |s->wrec| / |s->rrec|, respectively.
673 * 0: (in non-constant time) if the record is publically invalid (i.e. too
675 * 1: if the record's padding is valid / the encryption was successful.
676 * -1: if the record's padding/AEAD-authenticator is invalid or, if sending,
677 * an internal error occured.
679 int tls1_enc(SSL *s, int send)
684 int bs,i,j,k,pad=0,ret,mac_size=0;
685 const EVP_CIPHER *enc;
689 if (EVP_MD_CTX_md(s->write_hash))
691 int n=EVP_MD_CTX_size(s->write_hash);
692 OPENSSL_assert(n >= 0);
696 if (s->enc_write_ctx == NULL)
701 enc=EVP_CIPHER_CTX_cipher(s->enc_write_ctx);
702 /* For TLSv1.1 and later explicit IV */
703 if (s->version >= TLS1_1_VERSION
704 && EVP_CIPHER_mode(enc) == EVP_CIPH_CBC_MODE)
705 ivlen = EVP_CIPHER_iv_length(enc);
710 if ( rec->data != rec->input)
711 /* we can't write into the input stream:
712 * Can this ever happen?? (steve)
715 "%s:%d: rec->data != rec->input\n",
717 else if (RAND_bytes(rec->input, ivlen) <= 0)
724 if (EVP_MD_CTX_md(s->read_hash))
726 int n=EVP_MD_CTX_size(s->read_hash);
727 OPENSSL_assert(n >= 0);
731 if (s->enc_read_ctx == NULL)
734 enc=EVP_CIPHER_CTX_cipher(s->enc_read_ctx);
738 printf("tls1_enc(%d)\n", send);
739 #endif /* KSSL_DEBUG */
741 if ((s->session == NULL) || (ds == NULL) || (enc == NULL))
743 memmove(rec->data,rec->input,rec->length);
744 rec->input=rec->data;
750 bs=EVP_CIPHER_block_size(ds->cipher);
752 if (EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_AEAD_CIPHER)
754 unsigned char buf[13],*seq;
756 seq = send?s->s3->write_sequence:s->s3->read_sequence;
758 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
760 unsigned char dtlsseq[9],*p=dtlsseq;
762 s2n(send?s->d1->w_epoch:s->d1->r_epoch,p);
764 memcpy(buf,dtlsseq,8);
769 for (i=7; i>=0; i--) /* increment */
772 if (seq[i] != 0) break;
777 buf[9]=(unsigned char)(s->version>>8);
778 buf[10]=(unsigned char)(s->version);
779 buf[11]=rec->length>>8;
780 buf[12]=rec->length&0xff;
781 pad=EVP_CIPHER_CTX_ctrl(ds,EVP_CTRL_AEAD_TLS1_AAD,13,buf);
788 else if ((bs != 1) && send)
792 /* Add weird padding of upto 256 bytes */
794 /* we need to add 'i' padding bytes of value j */
796 if (s->options & SSL_OP_TLS_BLOCK_PADDING_BUG)
798 if (s->s3->flags & TLS1_FLAGS_TLS_PADDING_BUG)
801 for (k=(int)l; k<(int)(l+i); k++)
810 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
811 ds,rec->data,rec->input,l);
812 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
813 ds->buf_len, ds->cipher->key_len,
814 DES_KEY_SZ, DES_SCHEDULE_SZ,
817 for (i=0; i<ds->cipher->iv_len; i++) printf("%02X", ds->iv[i]);
819 printf("\trec->input=");
820 for (ui=0; ui<l; ui++) printf(" %02x", rec->input[ui]);
823 #endif /* KSSL_DEBUG */
827 if (l == 0 || l%bs != 0)
831 i = EVP_Cipher(ds,rec->data,rec->input,l);
832 if ((EVP_CIPHER_flags(ds->cipher)&EVP_CIPH_FLAG_CUSTOM_CIPHER)
835 return -1; /* AEAD can fail to verify MAC */
836 if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send)
838 rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN;
839 rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN;
840 rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
846 printf("\trec->data=");
848 printf(" %02x", rec->data[i]); printf("\n");
850 #endif /* KSSL_DEBUG */
853 if (EVP_MD_CTX_md(s->read_hash) != NULL)
854 mac_size = EVP_MD_CTX_size(s->read_hash);
855 if ((bs != 1) && !send)
856 ret = tls1_cbc_remove_padding(s, rec, bs, mac_size);
863 int tls1_cert_verify_mac(SSL *s, int md_nid, unsigned char *out)
866 EVP_MD_CTX ctx, *d=NULL;
869 if (s->s3->handshake_buffer)
870 if (!ssl3_digest_cached_records(s))
873 for (i=0;i<SSL_MAX_DIGEST;i++)
875 if (s->s3->handshake_dgst[i]&&EVP_MD_CTX_type(s->s3->handshake_dgst[i])==md_nid)
877 d=s->s3->handshake_dgst[i];
882 SSLerr(SSL_F_TLS1_CERT_VERIFY_MAC,SSL_R_NO_REQUIRED_DIGEST);
886 EVP_MD_CTX_init(&ctx);
887 EVP_MD_CTX_copy_ex(&ctx,d);
888 EVP_DigestFinal_ex(&ctx,out,&ret);
889 EVP_MD_CTX_cleanup(&ctx);
893 int tls1_final_finish_mac(SSL *s,
894 const char *str, int slen, unsigned char *out)
898 unsigned char buf[2*EVP_MAX_MD_SIZE];
899 unsigned char *q,buf2[12];
907 if (s->s3->handshake_buffer)
908 if (!ssl3_digest_cached_records(s))
911 EVP_MD_CTX_init(&ctx);
913 for (idx=0;ssl_get_handshake_digest(idx,&mask,&md);idx++)
915 if (mask & ssl_get_algorithm2(s))
917 int hashsize = EVP_MD_size(md);
918 if (hashsize < 0 || hashsize > (int)(sizeof buf - (size_t)(q-buf)))
920 /* internal error: 'buf' is too small for this cipersuite! */
925 EVP_MD_CTX_copy_ex(&ctx,s->s3->handshake_dgst[idx]);
926 EVP_DigestFinal_ex(&ctx,q,&i);
927 if (i != (unsigned int)hashsize) /* can't really happen */
934 if (!tls1_PRF(ssl_get_algorithm2(s),
935 str,slen, buf,(int)(q-buf), NULL,0, NULL,0, NULL,0,
936 s->session->master_key,s->session->master_key_length,
937 out,buf2,sizeof buf2))
939 EVP_MD_CTX_cleanup(&ctx);
947 int tls1_mac(SSL *ssl, unsigned char *md, int send)
954 EVP_MD_CTX hmac, *mac_ctx;
955 unsigned char header[13];
956 int stream_mac = (send?(ssl->mac_flags & SSL_MAC_FLAG_WRITE_MAC_STREAM):(ssl->mac_flags&SSL_MAC_FLAG_READ_MAC_STREAM));
961 rec= &(ssl->s3->wrec);
962 seq= &(ssl->s3->write_sequence[0]);
963 hash=ssl->write_hash;
967 rec= &(ssl->s3->rrec);
968 seq= &(ssl->s3->read_sequence[0]);
972 t=EVP_MD_CTX_size(hash);
973 OPENSSL_assert(t >= 0);
976 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
983 EVP_MD_CTX_copy(&hmac,hash);
987 if (ssl->version == DTLS1_VERSION || ssl->version == DTLS1_BAD_VER)
989 unsigned char dtlsseq[8],*p=dtlsseq;
991 s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p);
992 memcpy (p,&seq[2],6);
994 memcpy(header, dtlsseq, 8);
997 memcpy(header, seq, 8);
1000 header[9]=(unsigned char)(ssl->version>>8);
1001 header[10]=(unsigned char)(ssl->version);
1002 header[11]=(rec->length)>>8;
1003 header[12]=(rec->length)&0xff;
1006 EVP_CIPHER_CTX_mode(ssl->enc_read_ctx) == EVP_CIPH_CBC_MODE &&
1007 ssl3_cbc_record_digest_supported(mac_ctx))
1009 /* This is a CBC-encrypted record. We must avoid leaking any
1010 * timing-side channel information about how many blocks of
1011 * data we are hashing because that gives an attacker a
1013 ssl3_cbc_digest_record(
1017 rec->length + md_size, rec->orig_len,
1018 ssl->s3->read_mac_secret,
1019 ssl->s3->read_mac_secret_size,
1024 EVP_DigestSignUpdate(mac_ctx,header,sizeof(header));
1025 EVP_DigestSignUpdate(mac_ctx,rec->input,rec->length);
1026 t=EVP_DigestSignFinal(mac_ctx,md,&md_size);
1027 OPENSSL_assert(t > 0);
1031 EVP_MD_CTX_cleanup(&hmac);
1034 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",mac_sec[z]); printf("\n"); }
1036 {int z; for (z=0; z<8; z++) printf("%02X ",seq[z]); printf("\n"); }
1038 {int z; for (z=0; z<5; z++) printf("%02X ",buf[z]); printf("\n"); }
1040 {unsigned int z; for (z=0; z<rec->length; z++) printf("%02X ",buf[z]); printf("\n"); }
1043 if (ssl->version != DTLS1_VERSION && ssl->version != DTLS1_BAD_VER)
1045 for (i=7; i>=0; i--)
1048 if (seq[i] != 0) break;
1053 {unsigned int z; for (z=0; z<md_size; z++) printf("%02X ",md[z]); printf("\n"); }
1058 int tls1_generate_master_secret(SSL *s, unsigned char *out, unsigned char *p,
1061 unsigned char buff[SSL_MAX_MASTER_KEY_LENGTH];
1062 const void *co = NULL, *so = NULL;
1063 int col = 0, sol = 0;
1067 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s,out, p,len);
1068 #endif /* KSSL_DEBUG */
1070 #ifdef TLSEXT_TYPE_opaque_prf_input
1071 if (s->s3->client_opaque_prf_input != NULL && s->s3->server_opaque_prf_input != NULL &&
1072 s->s3->client_opaque_prf_input_len > 0 &&
1073 s->s3->client_opaque_prf_input_len == s->s3->server_opaque_prf_input_len)
1075 co = s->s3->client_opaque_prf_input;
1076 col = s->s3->server_opaque_prf_input_len;
1077 so = s->s3->server_opaque_prf_input;
1078 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) */
1082 tls1_PRF(ssl_get_algorithm2(s),
1083 TLS_MD_MASTER_SECRET_CONST,TLS_MD_MASTER_SECRET_CONST_SIZE,
1084 s->s3->client_random,SSL3_RANDOM_SIZE,
1086 s->s3->server_random,SSL3_RANDOM_SIZE,
1089 s->session->master_key,buff,sizeof buff);
1091 fprintf(stderr, "Premaster Secret:\n");
1092 BIO_dump_fp(stderr, (char *)p, len);
1093 fprintf(stderr, "Client Random:\n");
1094 BIO_dump_fp(stderr, (char *)s->s3->client_random, SSL3_RANDOM_SIZE);
1095 fprintf(stderr, "Server Random:\n");
1096 BIO_dump_fp(stderr, (char *)s->s3->server_random, SSL3_RANDOM_SIZE);
1097 fprintf(stderr, "Master Secret:\n");
1098 BIO_dump_fp(stderr, (char *)s->session->master_key, SSL3_MASTER_SECRET_SIZE);
1102 printf ("tls1_generate_master_secret() complete\n");
1103 #endif /* KSSL_DEBUG */
1104 return(SSL3_MASTER_SECRET_SIZE);
1107 int tls1_export_keying_material(SSL *s, unsigned char *out, size_t olen,
1108 const char *label, size_t llen, const unsigned char *context,
1109 size_t contextlen, int use_context)
1111 unsigned char *buff;
1112 unsigned char *val = NULL;
1113 size_t vallen, currentvalpos;
1117 printf ("tls1_export_keying_material(%p,%p,%d,%s,%d,%p,%d)\n", s, out, olen, label, llen, p, plen);
1118 #endif /* KSSL_DEBUG */
1120 buff = OPENSSL_malloc(olen);
1121 if (buff == NULL) goto err2;
1123 /* construct PRF arguments
1124 * we construct the PRF argument ourself rather than passing separate
1125 * values into the TLS PRF to ensure that the concatenation of values
1126 * does not create a prohibited label.
1128 vallen = llen + SSL3_RANDOM_SIZE * 2;
1131 vallen += 2 + contextlen;
1134 val = OPENSSL_malloc(vallen);
1135 if (val == NULL) goto err2;
1137 memcpy(val + currentvalpos, (unsigned char *) label, llen);
1138 currentvalpos += llen;
1139 memcpy(val + currentvalpos, s->s3->client_random, SSL3_RANDOM_SIZE);
1140 currentvalpos += SSL3_RANDOM_SIZE;
1141 memcpy(val + currentvalpos, s->s3->server_random, SSL3_RANDOM_SIZE);
1142 currentvalpos += SSL3_RANDOM_SIZE;
1146 val[currentvalpos] = (contextlen >> 8) & 0xff;
1148 val[currentvalpos] = contextlen & 0xff;
1150 if ((contextlen > 0) || (context != NULL))
1152 memcpy(val + currentvalpos, context, contextlen);
1156 /* disallow prohibited labels
1157 * note that SSL3_RANDOM_SIZE > max(prohibited label len) =
1158 * 15, so size of val > max(prohibited label len) = 15 and the
1159 * comparisons won't have buffer overflow
1161 if (memcmp(val, TLS_MD_CLIENT_FINISH_CONST,
1162 TLS_MD_CLIENT_FINISH_CONST_SIZE) == 0) goto err1;
1163 if (memcmp(val, TLS_MD_SERVER_FINISH_CONST,
1164 TLS_MD_SERVER_FINISH_CONST_SIZE) == 0) goto err1;
1165 if (memcmp(val, TLS_MD_MASTER_SECRET_CONST,
1166 TLS_MD_MASTER_SECRET_CONST_SIZE) == 0) goto err1;
1167 if (memcmp(val, TLS_MD_KEY_EXPANSION_CONST,
1168 TLS_MD_KEY_EXPANSION_CONST_SIZE) == 0) goto err1;
1170 rv = tls1_PRF(s->s3->tmp.new_cipher->algorithm2,
1176 s->session->master_key,s->session->master_key_length,
1180 printf ("tls1_export_keying_material() complete\n");
1181 #endif /* KSSL_DEBUG */
1184 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
1188 SSLerr(SSL_F_TLS1_EXPORT_KEYING_MATERIAL, ERR_R_MALLOC_FAILURE);
1191 if (buff != NULL) OPENSSL_free(buff);
1192 if (val != NULL) OPENSSL_free(val);
1196 int tls1_alert_code(int code)
1200 case SSL_AD_CLOSE_NOTIFY: return(SSL3_AD_CLOSE_NOTIFY);
1201 case SSL_AD_UNEXPECTED_MESSAGE: return(SSL3_AD_UNEXPECTED_MESSAGE);
1202 case SSL_AD_BAD_RECORD_MAC: return(SSL3_AD_BAD_RECORD_MAC);
1203 case SSL_AD_DECRYPTION_FAILED: return(TLS1_AD_DECRYPTION_FAILED);
1204 case SSL_AD_RECORD_OVERFLOW: return(TLS1_AD_RECORD_OVERFLOW);
1205 case SSL_AD_DECOMPRESSION_FAILURE:return(SSL3_AD_DECOMPRESSION_FAILURE);
1206 case SSL_AD_HANDSHAKE_FAILURE: return(SSL3_AD_HANDSHAKE_FAILURE);
1207 case SSL_AD_NO_CERTIFICATE: return(-1);
1208 case SSL_AD_BAD_CERTIFICATE: return(SSL3_AD_BAD_CERTIFICATE);
1209 case SSL_AD_UNSUPPORTED_CERTIFICATE:return(SSL3_AD_UNSUPPORTED_CERTIFICATE);
1210 case SSL_AD_CERTIFICATE_REVOKED:return(SSL3_AD_CERTIFICATE_REVOKED);
1211 case SSL_AD_CERTIFICATE_EXPIRED:return(SSL3_AD_CERTIFICATE_EXPIRED);
1212 case SSL_AD_CERTIFICATE_UNKNOWN:return(SSL3_AD_CERTIFICATE_UNKNOWN);
1213 case SSL_AD_ILLEGAL_PARAMETER: return(SSL3_AD_ILLEGAL_PARAMETER);
1214 case SSL_AD_UNKNOWN_CA: return(TLS1_AD_UNKNOWN_CA);
1215 case SSL_AD_ACCESS_DENIED: return(TLS1_AD_ACCESS_DENIED);
1216 case SSL_AD_DECODE_ERROR: return(TLS1_AD_DECODE_ERROR);
1217 case SSL_AD_DECRYPT_ERROR: return(TLS1_AD_DECRYPT_ERROR);
1218 case SSL_AD_EXPORT_RESTRICTION: return(TLS1_AD_EXPORT_RESTRICTION);
1219 case SSL_AD_PROTOCOL_VERSION: return(TLS1_AD_PROTOCOL_VERSION);
1220 case SSL_AD_INSUFFICIENT_SECURITY:return(TLS1_AD_INSUFFICIENT_SECURITY);
1221 case SSL_AD_INTERNAL_ERROR: return(TLS1_AD_INTERNAL_ERROR);
1222 case SSL_AD_USER_CANCELLED: return(TLS1_AD_USER_CANCELLED);
1223 case SSL_AD_NO_RENEGOTIATION: return(TLS1_AD_NO_RENEGOTIATION);
1224 case SSL_AD_UNSUPPORTED_EXTENSION: return(TLS1_AD_UNSUPPORTED_EXTENSION);
1225 case SSL_AD_CERTIFICATE_UNOBTAINABLE: return(TLS1_AD_CERTIFICATE_UNOBTAINABLE);
1226 case SSL_AD_UNRECOGNIZED_NAME: return(TLS1_AD_UNRECOGNIZED_NAME);
1227 case SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE: return(TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
1228 case SSL_AD_BAD_CERTIFICATE_HASH_VALUE: return(TLS1_AD_BAD_CERTIFICATE_HASH_VALUE);
1229 case SSL_AD_UNKNOWN_PSK_IDENTITY:return(TLS1_AD_UNKNOWN_PSK_IDENTITY);
1230 #if 0 /* not appropriate for TLS, not used for DTLS */
1231 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE: return
1232 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE);
1234 default: return(-1);