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 #include <openssl/comp.h>
115 #include <openssl/evp.h>
116 #include <openssl/hmac.h>
117 #include <openssl/md5.h>
119 static void tls1_P_hash(const EVP_MD
*md
, const unsigned char *sec
,
120 int sec_len
, unsigned char *seed
, int seed_len
,
121 unsigned char *out
, int olen
)
127 unsigned char A1
[EVP_MAX_MD_SIZE
];
130 chunk
=EVP_MD_size(md
);
133 HMAC_CTX_init(&ctx_tmp
);
134 HMAC_CTX_set_flags(&ctx
, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
);
135 HMAC_CTX_set_flags(&ctx_tmp
, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
);
136 HMAC_Init_ex(&ctx
,sec
,sec_len
,md
, NULL
);
137 HMAC_Init_ex(&ctx_tmp
,sec
,sec_len
,md
, NULL
);
138 HMAC_Update(&ctx
,seed
,seed_len
);
139 HMAC_Final(&ctx
,A1
,&A1_len
);
144 HMAC_Init_ex(&ctx
,NULL
,0,NULL
,NULL
); /* re-init */
145 HMAC_Init_ex(&ctx_tmp
,NULL
,0,NULL
,NULL
); /* re-init */
146 HMAC_Update(&ctx
,A1
,A1_len
);
147 HMAC_Update(&ctx_tmp
,A1
,A1_len
);
148 HMAC_Update(&ctx
,seed
,seed_len
);
152 HMAC_Final(&ctx
,out
,&j
);
155 HMAC_Final(&ctx_tmp
,A1
,&A1_len
); /* calc the next A1 value */
159 HMAC_Final(&ctx
,A1
,&A1_len
);
164 HMAC_CTX_cleanup(&ctx
);
165 HMAC_CTX_cleanup(&ctx_tmp
);
166 OPENSSL_cleanse(A1
,sizeof(A1
));
169 static void tls1_PRF(const EVP_MD
*md5
, const EVP_MD
*sha1
,
170 unsigned char *label
, int label_len
,
171 const unsigned char *sec
, int slen
, unsigned char *out1
,
172 unsigned char *out2
, int olen
)
175 const unsigned char *S1
,*S2
;
180 len
+=(slen
&1); /* add for odd, make longer */
183 tls1_P_hash(md5
,S1
,len
,label
,label_len
,out1
,olen
);
184 tls1_P_hash(sha1
,S2
,len
,label
,label_len
,out2
,olen
);
186 for (i
=0; i
<olen
; i
++)
190 static void tls1_generate_key_block(SSL
*s
, unsigned char *km
,
191 unsigned char *tmp
, int num
)
194 unsigned char buf
[SSL3_RANDOM_SIZE
*2+
195 TLS_MD_MAX_CONST_SIZE
];
198 memcpy(p
,TLS_MD_KEY_EXPANSION_CONST
,
199 TLS_MD_KEY_EXPANSION_CONST_SIZE
);
200 p
+=TLS_MD_KEY_EXPANSION_CONST_SIZE
;
201 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
203 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
206 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(p
-buf
),
207 s
->session
->master_key
,s
->session
->master_key_length
,
210 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
211 s
->session
->master_key_length
);
214 for (i
=0; i
< s
->session
->master_key_length
; i
++)
216 printf("%02X", s
->session
->master_key
[i
]);
219 #endif /* KSSL_DEBUG */
222 int tls1_change_cipher_state(SSL
*s
, int which
)
224 static const unsigned char empty
[]="";
225 unsigned char *p
,*key_block
,*mac_secret
;
226 unsigned char *exp_label
,buf
[TLS_MD_MAX_CONST_SIZE
+
228 unsigned char tmp1
[EVP_MAX_KEY_LENGTH
];
229 unsigned char tmp2
[EVP_MAX_KEY_LENGTH
];
230 unsigned char iv1
[EVP_MAX_IV_LENGTH
*2];
231 unsigned char iv2
[EVP_MAX_IV_LENGTH
*2];
232 unsigned char *ms
,*key
,*iv
,*er1
,*er2
;
236 #ifndef OPENSSL_NO_COMP
237 const SSL_COMP
*comp
;
240 int is_export
,n
,i
,j
,k
,exp_label_len
,cl
;
243 is_export
=SSL_C_IS_EXPORT(s
->s3
->tmp
.new_cipher
);
244 c
=s
->s3
->tmp
.new_sym_enc
;
245 m
=s
->s3
->tmp
.new_hash
;
246 #ifndef OPENSSL_NO_COMP
247 comp
=s
->s3
->tmp
.new_compression
;
249 key_block
=s
->s3
->tmp
.key_block
;
252 printf("tls1_change_cipher_state(which= %d) w/\n", which
);
253 printf("\talg= %ld, comp= %p\n", s
->s3
->tmp
.new_cipher
->algorithms
,
255 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", c
);
256 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
257 c
->nid
,c
->block_size
,c
->key_len
,c
->iv_len
);
258 printf("\tkey_block: len= %d, data= ", s
->s3
->tmp
.key_block_length
);
261 for (i
=0; i
<s
->s3
->tmp
.key_block_length
; i
++)
262 printf("%02x", key_block
[i
]); printf("\n");
264 #endif /* KSSL_DEBUG */
266 if (which
& SSL3_CC_READ
)
268 if (s
->enc_read_ctx
!= NULL
)
270 else if ((s
->enc_read_ctx
=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
)
273 /* make sure it's intialized in case we exit later with an error */
274 EVP_CIPHER_CTX_init(s
->enc_read_ctx
);
277 #ifndef OPENSSL_NO_COMP
278 if (s
->expand
!= NULL
)
280 COMP_CTX_free(s
->expand
);
285 s
->expand
=COMP_CTX_new(comp
->method
);
286 if (s
->expand
== NULL
)
288 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,SSL_R_COMPRESSION_LIBRARY_ERROR
);
291 if (s
->s3
->rrec
.comp
== NULL
)
292 s
->s3
->rrec
.comp
=(unsigned char *)
293 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH
);
294 if (s
->s3
->rrec
.comp
== NULL
)
298 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
299 if (s
->version
!= DTLS1_VERSION
)
300 memset(&(s
->s3
->read_sequence
[0]),0,8);
301 mac_secret
= &(s
->s3
->read_mac_secret
[0]);
305 if (s
->enc_write_ctx
!= NULL
)
307 else if ((s
->enc_write_ctx
=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
)
310 /* make sure it's intialized in case we exit later with an error */
311 EVP_CIPHER_CTX_init(s
->enc_write_ctx
);
312 dd
= s
->enc_write_ctx
;
314 #ifndef OPENSSL_NO_COMP
315 if (s
->compress
!= NULL
)
317 COMP_CTX_free(s
->compress
);
322 s
->compress
=COMP_CTX_new(comp
->method
);
323 if (s
->compress
== NULL
)
325 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,SSL_R_COMPRESSION_LIBRARY_ERROR
);
330 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
331 if (s
->version
!= DTLS1_VERSION
)
332 memset(&(s
->s3
->write_sequence
[0]),0,8);
333 mac_secret
= &(s
->s3
->write_mac_secret
[0]);
337 EVP_CIPHER_CTX_cleanup(dd
);
339 p
=s
->s3
->tmp
.key_block
;
341 cl
=EVP_CIPHER_key_length(c
);
342 j
=is_export
? (cl
< SSL_C_EXPORT_KEYLENGTH(s
->s3
->tmp
.new_cipher
) ?
343 cl
: SSL_C_EXPORT_KEYLENGTH(s
->s3
->tmp
.new_cipher
)) : cl
;
344 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
345 k
=EVP_CIPHER_iv_length(c
);
346 er1
= &(s
->s3
->client_random
[0]);
347 er2
= &(s
->s3
->server_random
[0]);
348 if ( (which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
349 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
))
352 key
= &(p
[ n
]); n
+=j
+j
;
353 iv
= &(p
[ n
]); n
+=k
+k
;
354 exp_label
=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST
;
355 exp_label_len
=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE
;
361 ms
= &(p
[ n
]); n
+=i
+j
;
362 key
= &(p
[ n
]); n
+=j
+k
;
364 exp_label
=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST
;
365 exp_label_len
=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE
;
369 if (n
> s
->s3
->tmp
.key_block_length
)
371 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,ERR_R_INTERNAL_ERROR
);
375 memcpy(mac_secret
,ms
,i
);
377 printf("which = %04X\nmac key=",which
);
378 { int z
; for (z
=0; z
<i
; z
++) printf("%02X%c",ms
[z
],((z
+1)%16)?' ':'\n'); }
382 /* In here I set both the read and write key/iv to the
383 * same value since only the correct one will be used :-).
386 memcpy(p
,exp_label
,exp_label_len
);
388 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
390 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
392 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(p
-buf
),key
,j
,
393 tmp1
,tmp2
,EVP_CIPHER_key_length(c
));
399 memcpy(p
,TLS_MD_IV_BLOCK_CONST
,
400 TLS_MD_IV_BLOCK_CONST_SIZE
);
401 p
+=TLS_MD_IV_BLOCK_CONST_SIZE
;
402 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
404 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
406 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,p
-buf
,empty
,0,
415 s
->session
->key_arg_length
=0;
419 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
420 printf("\tkey= "); for (i
=0; i
<c
->key_len
; i
++) printf("%02x", key
[i
]);
422 printf("\t iv= "); for (i
=0; i
<c
->iv_len
; i
++) printf("%02x", iv
[i
]);
425 #endif /* KSSL_DEBUG */
427 EVP_CipherInit_ex(dd
,c
,NULL
,key
,iv
,(which
& SSL3_CC_WRITE
));
429 printf("which = %04X\nkey=",which
);
430 { int z
; for (z
=0; z
<EVP_CIPHER_key_length(c
); z
++) printf("%02X%c",key
[z
],((z
+1)%16)?' ':'\n'); }
432 { int z
; for (z
=0; z
<k
; z
++) printf("%02X%c",iv
[z
],((z
+1)%16)?' ':'\n'); }
436 OPENSSL_cleanse(tmp1
,sizeof(tmp1
));
437 OPENSSL_cleanse(tmp2
,sizeof(tmp1
));
438 OPENSSL_cleanse(iv1
,sizeof(iv1
));
439 OPENSSL_cleanse(iv2
,sizeof(iv2
));
442 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,ERR_R_MALLOC_FAILURE
);
447 int tls1_setup_key_block(SSL
*s
)
449 unsigned char *p1
,*p2
;
456 printf ("tls1_setup_key_block()\n");
457 #endif /* KSSL_DEBUG */
459 if (s
->s3
->tmp
.key_block_length
!= 0)
462 if (!ssl_cipher_get_evp(s
->session
,&c
,&hash
,&comp
))
464 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
468 s
->s3
->tmp
.new_sym_enc
=c
;
469 s
->s3
->tmp
.new_hash
=hash
;
471 num
=EVP_CIPHER_key_length(c
)+EVP_MD_size(hash
)+EVP_CIPHER_iv_length(c
);
474 ssl3_cleanup_key_block(s
);
476 if ((p1
=(unsigned char *)OPENSSL_malloc(num
)) == NULL
)
478 if ((p2
=(unsigned char *)OPENSSL_malloc(num
)) == NULL
)
481 s
->s3
->tmp
.key_block_length
=num
;
482 s
->s3
->tmp
.key_block
=p1
;
486 printf("client random\n");
487 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->client_random
[z
],((z
+1)%16)?' ':'\n'); }
488 printf("server random\n");
489 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->server_random
[z
],((z
+1)%16)?' ':'\n'); }
490 printf("pre-master\n");
491 { int z
; for (z
=0; z
<s
->session
->master_key_length
; z
++) printf("%02X%c",s
->session
->master_key
[z
],((z
+1)%16)?' ':'\n'); }
493 tls1_generate_key_block(s
,p1
,p2
,num
);
494 OPENSSL_cleanse(p2
,num
);
497 printf("\nkey block\n");
498 { int z
; for (z
=0; z
<num
; z
++) printf("%02X%c",p1
[z
],((z
+1)%16)?' ':'\n'); }
501 if (!(s
->options
& SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
))
503 /* enable vulnerability countermeasure for CBC ciphers with
504 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
506 s
->s3
->need_empty_fragments
= 1;
508 if (s
->session
->cipher
!= NULL
)
510 if ((s
->session
->cipher
->algorithms
& SSL_ENC_MASK
) == SSL_eNULL
)
511 s
->s3
->need_empty_fragments
= 0;
513 #ifndef OPENSSL_NO_RC4
514 if ((s
->session
->cipher
->algorithms
& SSL_ENC_MASK
) == SSL_RC4
)
515 s
->s3
->need_empty_fragments
= 0;
522 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,ERR_R_MALLOC_FAILURE
);
526 int tls1_enc(SSL
*s
, int send
)
532 const EVP_CIPHER
*enc
;
536 if (s
->write_hash
!= NULL
)
537 n
=EVP_MD_size(s
->write_hash
);
540 if (s
->enc_write_ctx
== NULL
)
543 enc
=EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
);
547 if (s
->read_hash
!= NULL
)
548 n
=EVP_MD_size(s
->read_hash
);
551 if (s
->enc_read_ctx
== NULL
)
554 enc
=EVP_CIPHER_CTX_cipher(s
->enc_read_ctx
);
558 printf("tls1_enc(%d)\n", send
);
559 #endif /* KSSL_DEBUG */
561 if ((s
->session
== NULL
) || (ds
== NULL
) ||
564 memmove(rec
->data
,rec
->input
,rec
->length
);
565 rec
->input
=rec
->data
;
570 bs
=EVP_CIPHER_block_size(ds
->cipher
);
572 if ((bs
!= 1) && send
)
576 /* Add weird padding of upto 256 bytes */
578 /* we need to add 'i' padding bytes of value j */
580 if (s
->options
& SSL_OP_TLS_BLOCK_PADDING_BUG
)
582 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
585 for (k
=(int)l
; k
<(int)(l
+i
); k
++)
594 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
595 ds
,rec
->data
,rec
->input
,l
);
596 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%d %d], %d iv_len\n",
597 ds
->buf_len
, ds
->cipher
->key_len
,
598 DES_KEY_SZ
, DES_SCHEDULE_SZ
,
601 for (i
=0; i
<ds
->cipher
->iv_len
; i
++) printf("%02X", ds
->iv
[i
]);
603 printf("\trec->input=");
604 for (ui
=0; ui
<l
; ui
++) printf(" %02x", rec
->input
[ui
]);
607 #endif /* KSSL_DEBUG */
611 if (l
== 0 || l
%bs
!= 0)
613 SSLerr(SSL_F_TLS1_ENC
,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG
);
614 ssl3_send_alert(s
,SSL3_AL_FATAL
,SSL_AD_DECRYPTION_FAILED
);
619 EVP_Cipher(ds
,rec
->data
,rec
->input
,l
);
624 printf("\trec->data=");
626 printf(" %02x", rec
->data
[i
]); printf("\n");
628 #endif /* KSSL_DEBUG */
630 if ((bs
!= 1) && !send
)
632 ii
=i
=rec
->data
[l
-1]; /* padding_length */
634 /* NB: if compression is in operation the first packet
635 * may not be of even length so the padding bug check
636 * cannot be performed. This bug workaround has been
637 * around since SSLeay so hopefully it is either fixed
638 * now or no buggy implementation supports compression
641 if ( (s
->options
&SSL_OP_TLS_BLOCK_PADDING_BUG
)
644 /* First packet is even in size, so check */
645 if ((memcmp(s
->s3
->read_sequence
,
646 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii
& 1))
647 s
->s3
->flags
|=TLS1_FLAGS_TLS_PADDING_BUG
;
648 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
651 /* TLS 1.0 does not bound the number of padding bytes by the block size.
652 * All of them must have value 'padding_length'. */
653 if (i
> (int)rec
->length
)
655 /* Incorrect padding. SSLerr() and ssl3_alert are done
656 * by caller: we don't want to reveal whether this is
657 * a decryption error or a MAC verification failure
658 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
661 for (j
=(int)(l
-i
); j
<(int)l
; j
++)
663 if (rec
->data
[j
] != ii
)
665 /* Incorrect padding */
675 int tls1_cert_verify_mac(SSL
*s
, EVP_MD_CTX
*in_ctx
, unsigned char *out
)
680 EVP_MD_CTX_init(&ctx
);
681 EVP_MD_CTX_copy_ex(&ctx
,in_ctx
);
682 EVP_DigestFinal_ex(&ctx
,out
,&ret
);
683 EVP_MD_CTX_cleanup(&ctx
);
687 int tls1_final_finish_mac(SSL
*s
, EVP_MD_CTX
*in1_ctx
, EVP_MD_CTX
*in2_ctx
,
688 const char *str
, int slen
, unsigned char *out
)
692 unsigned char buf
[TLS_MD_MAX_CONST_SIZE
+MD5_DIGEST_LENGTH
+SHA_DIGEST_LENGTH
];
693 unsigned char *q
,buf2
[12];
699 EVP_MD_CTX_init(&ctx
);
700 EVP_MD_CTX_copy_ex(&ctx
,in1_ctx
);
701 EVP_DigestFinal_ex(&ctx
,q
,&i
);
703 EVP_MD_CTX_copy_ex(&ctx
,in2_ctx
);
704 EVP_DigestFinal_ex(&ctx
,q
,&i
);
707 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(q
-buf
),
708 s
->session
->master_key
,s
->session
->master_key_length
,
709 out
,buf2
,sizeof buf2
);
710 EVP_MD_CTX_cleanup(&ctx
);
715 int tls1_mac(SSL
*ssl
, unsigned char *md
, int send
)
718 unsigned char *mac_sec
,*seq
;
720 unsigned int md_size
;
723 unsigned char buf
[5];
727 rec
= &(ssl
->s3
->wrec
);
728 mac_sec
= &(ssl
->s3
->write_mac_secret
[0]);
729 seq
= &(ssl
->s3
->write_sequence
[0]);
730 hash
=ssl
->write_hash
;
734 rec
= &(ssl
->s3
->rrec
);
735 mac_sec
= &(ssl
->s3
->read_mac_secret
[0]);
736 seq
= &(ssl
->s3
->read_sequence
[0]);
740 md_size
=EVP_MD_size(hash
);
743 if (ssl
->version
== DTLS1_VERSION
&& ssl
->client_version
== DTLS1_BAD_VER
)
745 buf
[1]=TLS1_VERSION_MAJOR
;
746 buf
[2]=TLS1_VERSION_MINOR
;
749 buf
[1]=(unsigned char)(ssl
->version
>>8);
750 buf
[2]=(unsigned char)(ssl
->version
);
753 buf
[3]=rec
->length
>>8;
754 buf
[4]=rec
->length
&0xff;
756 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
757 HMAC_CTX_init(&hmac
);
758 HMAC_Init_ex(&hmac
,mac_sec
,EVP_MD_size(hash
),hash
,NULL
);
760 if (ssl
->version
== DTLS1_VERSION
&& ssl
->client_version
!= DTLS1_BAD_VER
)
762 unsigned char dtlsseq
[8],*p
=dtlsseq
;
764 s2n(send
?ssl
->d1
->w_epoch
:ssl
->d1
->r_epoch
, p
);
765 memcpy (p
,&seq
[2],6);
767 HMAC_Update(&hmac
,dtlsseq
,8);
770 HMAC_Update(&hmac
,seq
,8);
772 HMAC_Update(&hmac
,buf
,5);
773 HMAC_Update(&hmac
,rec
->input
,rec
->length
);
774 HMAC_Final(&hmac
,md
,&md_size
);
775 HMAC_CTX_cleanup(&hmac
);
779 {unsigned int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",mac_sec
[z
]); printf("\n"); }
781 {int z
; for (z
=0; z
<8; z
++) printf("%02X ",seq
[z
]); printf("\n"); }
783 {int z
; for (z
=0; z
<5; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
785 {unsigned int z
; for (z
=0; z
<rec
->length
; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
788 if ( SSL_version(ssl
) != DTLS1_VERSION
)
793 if (seq
[i
] != 0) break;
798 {unsigned int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",md
[z
]); printf("\n"); }
803 int tls1_generate_master_secret(SSL
*s
, unsigned char *out
, unsigned char *p
,
806 unsigned char buf
[SSL3_RANDOM_SIZE
*2+TLS_MD_MASTER_SECRET_CONST_SIZE
];
807 unsigned char buff
[SSL_MAX_MASTER_KEY_LENGTH
];
810 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", s
,out
, p
,len
);
811 #endif /* KSSL_DEBUG */
813 /* Setup the stuff to munge */
814 memcpy(buf
,TLS_MD_MASTER_SECRET_CONST
,
815 TLS_MD_MASTER_SECRET_CONST_SIZE
);
816 memcpy(&(buf
[TLS_MD_MASTER_SECRET_CONST_SIZE
]),
817 s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
818 memcpy(&(buf
[SSL3_RANDOM_SIZE
+TLS_MD_MASTER_SECRET_CONST_SIZE
]),
819 s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
820 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,
821 buf
,TLS_MD_MASTER_SECRET_CONST_SIZE
+SSL3_RANDOM_SIZE
*2,p
,len
,
822 s
->session
->master_key
,buff
,sizeof buff
);
824 printf ("tls1_generate_master_secret() complete\n");
825 #endif /* KSSL_DEBUG */
826 return(SSL3_MASTER_SECRET_SIZE
);
829 int tls1_alert_code(int code
)
833 case SSL_AD_CLOSE_NOTIFY
: return(SSL3_AD_CLOSE_NOTIFY
);
834 case SSL_AD_UNEXPECTED_MESSAGE
: return(SSL3_AD_UNEXPECTED_MESSAGE
);
835 case SSL_AD_BAD_RECORD_MAC
: return(SSL3_AD_BAD_RECORD_MAC
);
836 case SSL_AD_DECRYPTION_FAILED
: return(TLS1_AD_DECRYPTION_FAILED
);
837 case SSL_AD_RECORD_OVERFLOW
: return(TLS1_AD_RECORD_OVERFLOW
);
838 case SSL_AD_DECOMPRESSION_FAILURE
:return(SSL3_AD_DECOMPRESSION_FAILURE
);
839 case SSL_AD_HANDSHAKE_FAILURE
: return(SSL3_AD_HANDSHAKE_FAILURE
);
840 case SSL_AD_NO_CERTIFICATE
: return(-1);
841 case SSL_AD_BAD_CERTIFICATE
: return(SSL3_AD_BAD_CERTIFICATE
);
842 case SSL_AD_UNSUPPORTED_CERTIFICATE
:return(SSL3_AD_UNSUPPORTED_CERTIFICATE
);
843 case SSL_AD_CERTIFICATE_REVOKED
:return(SSL3_AD_CERTIFICATE_REVOKED
);
844 case SSL_AD_CERTIFICATE_EXPIRED
:return(SSL3_AD_CERTIFICATE_EXPIRED
);
845 case SSL_AD_CERTIFICATE_UNKNOWN
:return(SSL3_AD_CERTIFICATE_UNKNOWN
);
846 case SSL_AD_ILLEGAL_PARAMETER
: return(SSL3_AD_ILLEGAL_PARAMETER
);
847 case SSL_AD_UNKNOWN_CA
: return(TLS1_AD_UNKNOWN_CA
);
848 case SSL_AD_ACCESS_DENIED
: return(TLS1_AD_ACCESS_DENIED
);
849 case SSL_AD_DECODE_ERROR
: return(TLS1_AD_DECODE_ERROR
);
850 case SSL_AD_DECRYPT_ERROR
: return(TLS1_AD_DECRYPT_ERROR
);
851 case SSL_AD_EXPORT_RESTRICTION
: return(TLS1_AD_EXPORT_RESTRICTION
);
852 case SSL_AD_PROTOCOL_VERSION
: return(TLS1_AD_PROTOCOL_VERSION
);
853 case SSL_AD_INSUFFICIENT_SECURITY
:return(TLS1_AD_INSUFFICIENT_SECURITY
);
854 case SSL_AD_INTERNAL_ERROR
: return(TLS1_AD_INTERNAL_ERROR
);
855 case SSL_AD_USER_CANCELLED
: return(TLS1_AD_USER_CANCELLED
);
856 case SSL_AD_NO_RENEGOTIATION
: return(TLS1_AD_NO_RENEGOTIATION
);
857 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
858 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
: return
859 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
);