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.]
63 static unsigned char ssl3_pad_1
[48]={
64 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
65 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
66 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
67 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
68 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36,
69 0x36,0x36,0x36,0x36,0x36,0x36,0x36,0x36 };
71 static unsigned char ssl3_pad_2
[48]={
72 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
73 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
74 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
75 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
76 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,
77 0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c,0x5c };
80 static int ssl3_handshake_mac(SSL
*s
, EVP_MD_CTX
*in_ctx
,
81 unsigned char *sender
, int len
, unsigned char *p
);
83 static int ssl3_handshake_mac();
86 static void ssl3_generate_key_block(s
,km
,num
)
93 unsigned char buf
[8],smd
[SHA_DIGEST_LENGTH
];
98 for (i
=0; i
<num
; i
+=MD5_DIGEST_LENGTH
)
105 SHA1_Update(&s1
,buf
,k
);
106 SHA1_Update(&s1
,s
->session
->master_key
,
107 s
->session
->master_key_length
);
108 SHA1_Update(&s1
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
109 SHA1_Update(&s1
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
110 SHA1_Final( smd
,&s1
);
113 MD5_Update(&m5
,s
->session
->master_key
,
114 s
->session
->master_key_length
);
115 MD5_Update(&m5
,smd
,SHA_DIGEST_LENGTH
);
116 if ((i
+MD5_DIGEST_LENGTH
) > num
)
119 memcpy(km
,smd
,(num
-i
));
124 km
+=MD5_DIGEST_LENGTH
;
126 memset(smd
,0,SHA_DIGEST_LENGTH
);
129 int ssl3_change_cipher_state(s
,which
)
133 unsigned char *p
,*key_block
,*mac_secret
;
134 unsigned char exp_key
[EVP_MAX_KEY_LENGTH
];
135 unsigned char exp_iv
[EVP_MAX_KEY_LENGTH
];
136 unsigned char *ms
,*key
,*iv
,*er1
,*er2
;
139 SSL_COMPRESSION
*comp
;
144 exp
=(s
->s3
->tmp
.new_cipher
->algorithms
& SSL_EXPORT
)?1:0;
145 c
=s
->s3
->tmp
.new_sym_enc
;
146 m
=s
->s3
->tmp
.new_hash
;
147 comp
=s
->s3
->tmp
.new_compression
;
148 key_block
=s
->s3
->tmp
.key_block
;
150 if (which
& SSL3_CC_READ
)
152 if ((s
->enc_read_ctx
== NULL
) &&
153 ((s
->enc_read_ctx
=(EVP_CIPHER_CTX
*)
154 Malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
))
158 s
->read_compression
=comp
;
159 memset(&(s
->s3
->read_sequence
[0]),0,8);
160 mac_secret
= &(s
->s3
->read_mac_secret
[0]);
164 if ((s
->enc_write_ctx
== NULL
) &&
165 ((s
->enc_write_ctx
=(EVP_CIPHER_CTX
*)
166 Malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
))
168 dd
= s
->enc_write_ctx
;
170 s
->write_compression
=comp
;
171 memset(&(s
->s3
->write_sequence
[0]),0,8);
172 mac_secret
= &(s
->s3
->write_mac_secret
[0]);
175 EVP_CIPHER_CTX_init(dd
);
177 p
=s
->s3
->tmp
.key_block
;
179 j
=(exp
)?5:EVP_CIPHER_key_length(c
);
180 k
=EVP_CIPHER_iv_length(c
);
181 if ( (which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
182 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
))
185 key
= &(p
[ n
]); n
+=j
+j
;
186 iv
= &(p
[ n
]); n
+=k
+k
;
187 er1
= &(s
->s3
->client_random
[0]);
188 er2
= &(s
->s3
->server_random
[0]);
193 ms
= &(p
[ n
]); n
+=i
+j
;
194 key
= &(p
[ n
]); n
+=j
+k
;
196 er1
= &(s
->s3
->server_random
[0]);
197 er2
= &(s
->s3
->client_random
[0]);
200 if (n
> s
->s3
->tmp
.key_block_length
)
202 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE
,SSL_R_INTERNAL_ERROR
);
206 memcpy(mac_secret
,ms
,i
);
209 /* In here I set both the read and write key/iv to the
210 * same value since only the correct one will be used :-).
213 MD5_Update(&md
,key
,j
);
214 MD5_Update(&md
,er1
,SSL3_RANDOM_SIZE
);
215 MD5_Update(&md
,er2
,SSL3_RANDOM_SIZE
);
216 MD5_Final(&(exp_key
[0]),&md
);
222 MD5_Update(&md
,er1
,SSL3_RANDOM_SIZE
);
223 MD5_Update(&md
,er2
,SSL3_RANDOM_SIZE
);
224 MD5_Final(&(exp_iv
[0]),&md
);
229 s
->session
->key_arg_length
=0;
231 EVP_CipherInit(dd
,c
,key
,iv
,(which
& SSL3_CC_WRITE
));
233 memset(&(exp_key
[0]),0,sizeof(exp_key
));
234 memset(&(exp_iv
[0]),0,sizeof(exp_iv
));
237 SSLerr(SSL_F_SSL3_CHANGE_CIPHER_STATE
,ERR_R_MALLOC_FAILURE
);
242 int ssl3_setup_key_block(s
)
250 if (s
->s3
->tmp
.key_block_length
!= 0)
253 if (!ssl_cipher_get_evp(s
->session
->cipher
,&c
,&hash
))
255 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK
,SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
259 s
->s3
->tmp
.new_sym_enc
=c
;
260 s
->s3
->tmp
.new_hash
=hash
;
262 exp
=(s
->session
->cipher
->algorithms
& SSL_EXPORT
)?1:0;
264 num
=EVP_CIPHER_key_length(c
)+EVP_MD_size(hash
)+EVP_CIPHER_iv_length(c
);
267 ssl3_cleanup_key_block(s
);
269 if ((p
=(unsigned char *)Malloc(num
)) == NULL
)
272 s
->s3
->tmp
.key_block_length
=num
;
273 s
->s3
->tmp
.key_block
=p
;
275 ssl3_generate_key_block(s
,p
,num
);
279 SSLerr(SSL_F_SSL3_SETUP_KEY_BLOCK
,ERR_R_MALLOC_FAILURE
);
283 void ssl3_cleanup_key_block(s
)
286 if (s
->s3
->tmp
.key_block
!= NULL
)
288 memset(s
->s3
->tmp
.key_block
,0,
289 s
->s3
->tmp
.key_block_length
);
290 Free(s
->s3
->tmp
.key_block
);
291 s
->s3
->tmp
.key_block
=NULL
;
293 s
->s3
->tmp
.key_block_length
=0;
305 SSL_COMPRESSION
*comp
;
311 if (s
->enc_write_ctx
== NULL
)
312 { enc
=NULL
; comp
=NULL
; }
315 enc
=EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
);
316 comp
=s
->write_compression
;
323 if (s
->enc_read_ctx
== NULL
)
324 { enc
=NULL
; comp
=NULL
; }
327 enc
=EVP_CIPHER_CTX_cipher(s
->enc_read_ctx
);
328 comp
=s
->read_compression
;
332 if ((s
->session
== NULL
) || (ds
== NULL
) ||
333 ((enc
== NULL
) && (comp
== NULL
)))
335 memcpy(rec
->data
,rec
->input
,rec
->length
);
336 rec
->input
=rec
->data
;
341 bs
=EVP_CIPHER_block_size(ds
->cipher
);
343 /* This should be using (bs-1) and bs instead of 7 and 8 */
344 if ((bs
!= 1) && send
)
348 /* we need to add 'i-1' padding bytes */
351 rec
->input
[l
-1]=(i
-1);
354 EVP_Cipher(ds
,rec
->data
,rec
->input
,l
);
356 if ((bs
!= 1) && !send
)
361 SSLerr(SSL_F_SSL3_ENC
,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG
);
362 ssl3_send_alert(s
,SSL3_AL_FATAL
,SSL_AD_DECRYPT_ERROR
);
371 void ssl3_init_finished_mac(s
)
374 EVP_DigestInit(&(s
->s3
->finish_dgst1
),s
->ctx
->md5
);
375 EVP_DigestInit(&(s
->s3
->finish_dgst2
),s
->ctx
->sha1
);
378 void ssl3_finish_mac(s
,buf
,len
)
383 EVP_DigestUpdate(&(s
->s3
->finish_dgst1
),buf
,len
);
384 EVP_DigestUpdate(&(s
->s3
->finish_dgst2
),buf
,len
);
387 int ssl3_cert_verify_mac(s
,ctx
,p
)
392 return(ssl3_handshake_mac(s
,ctx
,NULL
,0,p
));
395 int ssl3_final_finish_mac(s
,ctx1
,ctx2
,sender
,len
,p
)
397 EVP_MD_CTX
*ctx1
,*ctx2
;
398 unsigned char *sender
;
404 ret
=ssl3_handshake_mac(s
,ctx1
,sender
,len
,p
);
406 ret
+=ssl3_handshake_mac(s
,ctx2
,sender
,len
,p
);
410 static int ssl3_handshake_mac(s
,in_ctx
,sender
,len
,p
)
413 unsigned char *sender
;
420 unsigned char md_buf
[EVP_MAX_MD_SIZE
];
423 memcpy(&ctx
,in_ctx
,sizeof(EVP_MD_CTX
));
425 n
=EVP_MD_CTX_size(&ctx
);
429 EVP_DigestUpdate(&ctx
,sender
,len
);
430 EVP_DigestUpdate(&ctx
,s
->session
->master_key
,
431 s
->session
->master_key_length
);
432 EVP_DigestUpdate(&ctx
,ssl3_pad_1
,npad
);
433 EVP_DigestFinal(&ctx
,md_buf
,&i
);
435 EVP_DigestInit(&ctx
,EVP_MD_CTX_type(&ctx
));
436 EVP_DigestUpdate(&ctx
,s
->session
->master_key
,
437 s
->session
->master_key_length
);
438 EVP_DigestUpdate(&ctx
,ssl3_pad_2
,npad
);
439 EVP_DigestUpdate(&ctx
,md_buf
,i
);
440 EVP_DigestFinal(&ctx
,p
,&ret
);
442 memset(&ctx
,0,sizeof(EVP_MD_CTX
));
447 int ssl3_mac(ssl
,md
,send
)
453 unsigned char *mac_sec
,*seq
;
456 unsigned char *p
,rec_char
;
457 unsigned int md_size
;
462 rec
= &(ssl
->s3
->wrec
);
463 mac_sec
= &(ssl
->s3
->write_mac_secret
[0]);
464 seq
= &(ssl
->s3
->write_sequence
[0]);
465 hash
=ssl
->write_hash
;
469 rec
= &(ssl
->s3
->rrec
);
470 mac_sec
= &(ssl
->s3
->read_mac_secret
[0]);
471 seq
= &(ssl
->s3
->read_sequence
[0]);
475 md_size
=EVP_MD_size(hash
);
476 npad
=(48/md_size
)*md_size
;
478 /* Chop the digest off the end :-) */
480 EVP_DigestInit( &md_ctx
,hash
);
481 EVP_DigestUpdate(&md_ctx
,mac_sec
,md_size
);
482 EVP_DigestUpdate(&md_ctx
,ssl3_pad_1
,npad
);
483 EVP_DigestUpdate(&md_ctx
,seq
,8);
485 EVP_DigestUpdate(&md_ctx
,&rec_char
,1);
488 EVP_DigestUpdate(&md_ctx
,md
,2);
489 EVP_DigestUpdate(&md_ctx
,rec
->input
,rec
->length
);
490 EVP_DigestFinal( &md_ctx
,md
,NULL
);
492 EVP_DigestInit( &md_ctx
,hash
);
493 EVP_DigestUpdate(&md_ctx
,mac_sec
,md_size
);
494 EVP_DigestUpdate(&md_ctx
,ssl3_pad_2
,npad
);
495 EVP_DigestUpdate(&md_ctx
,md
,md_size
);
496 EVP_DigestFinal( &md_ctx
,md
,&md_size
);
504 int ssl3_generate_master_secret(s
,out
,p
,len
)
510 static unsigned char *salt
[3]={
511 (unsigned char *)"A",
512 (unsigned char *)"BB",
513 (unsigned char *)"CCC",
515 unsigned char buf
[EVP_MAX_MD_SIZE
];
522 EVP_DigestInit(&ctx
,s
->ctx
->sha1
);
523 EVP_DigestUpdate(&ctx
,salt
[i
],strlen((char *)salt
[i
]));
524 EVP_DigestUpdate(&ctx
,p
,len
);
525 EVP_DigestUpdate(&ctx
,&(s
->s3
->client_random
[0]),
527 EVP_DigestUpdate(&ctx
,&(s
->s3
->server_random
[0]),
529 EVP_DigestFinal(&ctx
,buf
,&n
);
531 EVP_DigestInit(&ctx
,s
->ctx
->md5
);
532 EVP_DigestUpdate(&ctx
,p
,len
);
533 EVP_DigestUpdate(&ctx
,buf
,n
);
534 EVP_DigestFinal(&ctx
,out
,&n
);
541 int ssl3_alert_code(code
)
546 case SSL_AD_CLOSE_NOTIFY
: return(SSL3_AD_CLOSE_NOTIFY
);
547 case SSL_AD_UNEXPECTED_MESSAGE
: return(SSL3_AD_UNEXPECTED_MESSAGE
);
548 case SSL_AD_BAD_RECORD_MAC
: return(SSL3_AD_BAD_RECORD_MAC
);
549 case SSL_AD_DECRYPTION_FAILED
: return(SSL3_AD_BAD_RECORD_MAC
);
550 case SSL_AD_RECORD_OVERFLOW
: return(SSL3_AD_BAD_RECORD_MAC
);
551 case SSL_AD_DECOMPRESSION_FAILURE
:return(SSL3_AD_DECOMPRESSION_FAILURE
);
552 case SSL_AD_HANDSHAKE_FAILURE
: return(SSL3_AD_HANDSHAKE_FAILURE
);
553 case SSL_AD_NO_CERTIFICATE
: return(SSL3_AD_NO_CERTIFICATE
);
554 case SSL_AD_BAD_CERTIFICATE
: return(SSL3_AD_BAD_CERTIFICATE
);
555 case SSL_AD_UNSUPPORTED_CERTIFICATE
:return(SSL3_AD_UNSUPPORTED_CERTIFICATE
);
556 case SSL_AD_CERTIFICATE_REVOKED
:return(SSL3_AD_CERTIFICATE_REVOKED
);
557 case SSL_AD_CERTIFICATE_EXPIRED
:return(SSL3_AD_CERTIFICATE_EXPIRED
);
558 case SSL_AD_CERTIFICATE_UNKNOWN
:return(SSL3_AD_CERTIFICATE_UNKNOWN
);
559 case SSL_AD_ILLEGAL_PARAMETER
: return(SSL3_AD_ILLEGAL_PARAMETER
);
560 case SSL_AD_UNKNOWN_CA
: return(SSL3_AD_BAD_CERTIFICATE
);
561 case SSL_AD_ACCESS_DENIED
: return(SSL3_AD_HANDSHAKE_FAILURE
);
562 case SSL_AD_DECODE_ERROR
: return(SSL3_AD_HANDSHAKE_FAILURE
);
563 case SSL_AD_DECRYPT_ERROR
: return(SSL3_AD_HANDSHAKE_FAILURE
);
564 case SSL_AD_EXPORT_RESTRICION
: return(SSL3_AD_HANDSHAKE_FAILURE
);
565 case SSL_AD_PROTOCOL_VERSION
: return(SSL3_AD_HANDSHAKE_FAILURE
);
566 case SSL_AD_INSUFFICIENT_SECURITY
:return(SSL3_AD_HANDSHAKE_FAILURE
);
567 case SSL_AD_INTERNAL_ERROR
: return(SSL3_AD_HANDSHAKE_FAILURE
);
568 case SSL_AD_USER_CANCLED
: return(SSL3_AD_HANDSHAKE_FAILURE
);
569 case SSL_AD_NO_RENEGOTIATION
: return(-1); /* Don't send it :-) */