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.]
64 static void tls1_P_hash(md
,sec
,sec_len
,seed
,seed_len
,out
,olen
)
77 unsigned char A1
[HMAC_MAX_MD_CBLOCK
];
80 chunk
=EVP_MD_size(md
);
82 HMAC_Init(&ctx
,sec
,sec_len
,md
);
83 HMAC_Update(&ctx
,seed
,seed_len
);
84 HMAC_Final(&ctx
,A1
,&A1_len
);
89 HMAC_Init(&ctx
,NULL
,0,NULL
); /* re-init */
90 HMAC_Update(&ctx
,A1
,A1_len
);
91 memcpy(&ctx_tmp
,&ctx
,sizeof(ctx
)); /* Copy for A2 */ /* not needed for last one */
92 HMAC_Update(&ctx
,seed
,seed_len
);
96 HMAC_Final(&ctx
,out
,&j
);
99 HMAC_Final(&ctx_tmp
,A1
,&A1_len
); /* calc the next A1 value */
103 HMAC_Final(&ctx
,A1
,&A1_len
);
109 HMAC_cleanup(&ctx_tmp
);
110 memset(A1
,0,sizeof(A1
));
113 static void tls1_PRF(md5
,sha1
,label
,label_len
,sec
,slen
,out1
,out2
,olen
)
116 unsigned char *label
;
125 unsigned char *S1
,*S2
;
130 len
+=(slen
&1); /* add for odd, make longer */
133 tls1_P_hash(md5
,S1
,len
,label
,label_len
,out1
,olen
);
134 tls1_P_hash(sha1
,S2
,len
,label
,label_len
,out2
,olen
);
136 for (i
=0; i
<olen
; i
++)
140 static void tls1_generate_key_block(s
,km
,tmp
,num
)
142 unsigned char *km
,*tmp
;
146 unsigned char buf
[SSL3_RANDOM_SIZE
*2+
147 TLS_MD_MAX_CONST_SIZE
];
150 memcpy(p
,TLS_MD_KEY_EXPANSION_CONST
,
151 TLS_MD_KEY_EXPANSION_CONST_SIZE
);
152 p
+=TLS_MD_KEY_EXPANSION_CONST_SIZE
;
153 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
155 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
158 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,p
-buf
,
159 s
->session
->master_key
,s
->session
->master_key_length
,
163 int tls1_change_cipher_state(s
,which
)
167 unsigned char *p
,*key_block
,*mac_secret
;
168 unsigned char *exp_label
,buf
[TLS_MD_MAX_CONST_SIZE
+
170 unsigned char tmp1
[EVP_MAX_KEY_LENGTH
];
171 unsigned char tmp2
[EVP_MAX_KEY_LENGTH
];
172 unsigned char iv1
[EVP_MAX_IV_LENGTH
*2];
173 unsigned char iv2
[EVP_MAX_IV_LENGTH
*2];
174 unsigned char *ms
,*key
,*iv
,*er1
,*er2
;
178 SSL_COMPRESSION
*comp
;
180 int exp
,n
,i
,j
,k
,exp_label_len
;
182 exp
=(s
->s3
->tmp
.new_cipher
->algorithms
& SSL_EXPORT
)?1:0;
183 c
=s
->s3
->tmp
.new_sym_enc
;
184 m
=s
->s3
->tmp
.new_hash
;
185 comp
=s
->s3
->tmp
.new_compression
;
186 key_block
=s
->s3
->tmp
.key_block
;
188 if (which
& SSL3_CC_READ
)
190 if ((s
->enc_read_ctx
== NULL
) &&
191 ((s
->enc_read_ctx
=(EVP_CIPHER_CTX
*)
192 Malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
))
196 s
->read_compression
=comp
;
197 memset(&(s
->s3
->read_sequence
[0]),0,8);
198 mac_secret
= &(s
->s3
->read_mac_secret
[0]);
202 if ((s
->enc_write_ctx
== NULL
) &&
203 ((s
->enc_write_ctx
=(EVP_CIPHER_CTX
*)
204 Malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
))
206 dd
= s
->enc_write_ctx
;
208 s
->write_compression
=comp
;
209 memset(&(s
->s3
->write_sequence
[0]),0,8);
210 mac_secret
= &(s
->s3
->write_mac_secret
[0]);
213 EVP_CIPHER_CTX_init(dd
);
215 p
=s
->s3
->tmp
.key_block
;
217 j
=(exp
)?5:EVP_CIPHER_key_length(c
);
218 k
=EVP_CIPHER_iv_length(c
);
219 er1
= &(s
->s3
->client_random
[0]);
220 er2
= &(s
->s3
->server_random
[0]);
221 if ( (which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
222 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
))
225 key
= &(p
[ n
]); n
+=j
+j
;
226 iv
= &(p
[ n
]); n
+=k
+k
;
227 exp_label
=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST
;
228 exp_label_len
=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE
;
234 ms
= &(p
[ n
]); n
+=i
+j
;
235 key
= &(p
[ n
]); n
+=j
+k
;
237 exp_label
=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST
;
238 exp_label_len
=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE
;
242 if (n
> s
->s3
->tmp
.key_block_length
)
244 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,SSL_R_INTERNAL_ERROR
);
248 memcpy(mac_secret
,ms
,i
);
250 printf("which = %04X\nmac key=",which
);
251 { int z
; for (z
=0; z
<i
; z
++) printf("%02X%c",ms
[z
],((z
+1)%16)?' ':'\n'); }
255 /* In here I set both the read and write key/iv to the
256 * same value since only the correct one will be used :-).
259 memcpy(p
,exp_label
,exp_label_len
);
261 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
263 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
265 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,p
-buf
,key
,j
,
266 tmp1
,tmp2
,EVP_CIPHER_key_length(c
));
272 memcpy(p
,TLS_MD_IV_BLOCK_CONST
,
273 TLS_MD_IV_BLOCK_CONST_SIZE
);
274 p
+=TLS_MD_IV_BLOCK_CONST_SIZE
;
275 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
277 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
279 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,
280 buf
,p
-buf
,"",0,iv1
,iv2
,k
*2);
288 s
->session
->key_arg_length
=0;
290 EVP_CipherInit(dd
,c
,key
,iv
,(which
& SSL3_CC_WRITE
));
292 printf("which = %04X\nkey=",which
);
293 { int z
; for (z
=0; z
<EVP_CIPHER_key_length(c
); z
++) printf("%02X%c",key
[z
],((z
+1)%16)?' ':'\n'); }
295 { int z
; for (z
=0; z
<k
; z
++) printf("%02X%c",iv
[z
],((z
+1)%16)?' ':'\n'); }
299 memset(tmp1
,0,sizeof(tmp1
));
300 memset(tmp2
,0,sizeof(tmp1
));
301 memset(iv1
,0,sizeof(iv1
));
302 memset(iv2
,0,sizeof(iv2
));
305 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,ERR_R_MALLOC_FAILURE
);
310 int tls1_setup_key_block(s
)
313 unsigned char *p1
,*p2
;
318 if (s
->s3
->tmp
.key_block_length
!= 0)
321 if (!ssl_cipher_get_evp(s
->session
->cipher
,&c
,&hash
))
323 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
327 s
->s3
->tmp
.new_sym_enc
=c
;
328 s
->s3
->tmp
.new_hash
=hash
;
330 exp
=(s
->session
->cipher
->algorithms
& SSL_EXPORT
)?1:0;
332 num
=EVP_CIPHER_key_length(c
)+EVP_MD_size(hash
)+EVP_CIPHER_iv_length(c
);
335 ssl3_cleanup_key_block(s
);
337 if ((p1
=(unsigned char *)Malloc(num
)) == NULL
)
339 if ((p2
=(unsigned char *)Malloc(num
)) == NULL
)
342 s
->s3
->tmp
.key_block_length
=num
;
343 s
->s3
->tmp
.key_block
=p1
;
347 printf("client random\n");
348 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->client_random
[z
],((z
+1)%16)?' ':'\n'); }
349 printf("server random\n");
350 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->server_random
[z
],((z
+1)%16)?' ':'\n'); }
351 printf("pre-master\n");
352 { int z
; for (z
=0; z
<s
->session
->master_key_length
; z
++) printf("%02X%c",s
->session
->master_key
[z
],((z
+1)%16)?' ':'\n'); }
354 tls1_generate_key_block(s
,p1
,p2
,num
);
358 printf("\nkey block\n");
359 { int z
; for (z
=0; z
<num
; z
++) printf("%02X%c",p1
[z
],((z
+1)%16)?' ':'\n'); }
364 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,ERR_R_MALLOC_FAILURE
);
377 SSL_COMPRESSION
*comp
;
381 if (s
->write_hash
!= NULL
)
382 n
=EVP_MD_size(s
->write_hash
);
385 if (s
->enc_write_ctx
== NULL
)
386 { enc
=NULL
; comp
=NULL
; }
389 enc
=EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
);
390 comp
=s
->write_compression
;
395 if (s
->read_hash
!= NULL
)
396 n
=EVP_MD_size(s
->read_hash
);
399 if (s
->enc_read_ctx
== NULL
)
400 { enc
=NULL
; comp
=NULL
; }
403 enc
=EVP_CIPHER_CTX_cipher(s
->enc_read_ctx
);
404 comp
=s
->read_compression
;
408 if ((s
->session
== NULL
) || (ds
== NULL
) ||
409 ((enc
== NULL
) && (comp
== NULL
)))
411 memcpy(rec
->data
,rec
->input
,rec
->length
);
412 rec
->input
=rec
->data
;
417 bs
=EVP_CIPHER_block_size(ds
->cipher
);
419 if ((bs
!= 1) && send
)
423 /* Add weird padding of upto 256 bytes */
425 /* we need to add 'i' padding bytes of value j */
427 if (s
->options
& SSL_OP_TLS_BLOCK_PADDING_BUG
)
429 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
432 for (k
=(int)l
; k
<(int)(l
+i
); k
++)
438 EVP_Cipher(ds
,rec
->data
,rec
->input
,l
);
440 if ((bs
!= 1) && !send
)
444 if (s
->options
&SSL_OP_TLS_BLOCK_PADDING_BUG
)
446 /* First packet is even in size, so check */
447 if ((memcmp(s
->s3
->read_sequence
,
448 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii
& 1))
449 s
->s3
->flags
|=TLS1_FLAGS_TLS_PADDING_BUG
;
450 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
453 if (i
> (int)rec
->length
)
455 SSLerr(SSL_F_TLS1_ENC
,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG
);
456 ssl3_send_alert(s
,SSL3_AL_FATAL
,SSL_AD_DECRYPTION_FAILED
);
459 for (j
=(int)(l
-i
); j
<(int)l
; j
++)
461 if (rec
->data
[j
] != ii
)
463 SSLerr(SSL_F_TLS1_ENC
,SSL_R_DECRYPTION_FAILED
);
464 ssl3_send_alert(s
,SSL3_AL_FATAL
,SSL_AD_DECRYPTION_FAILED
);
474 int tls1_cert_verify_mac(s
,in_ctx
,out
)
482 memcpy(&ctx
,in_ctx
,sizeof(EVP_MD_CTX
));
483 EVP_DigestFinal(&ctx
,out
,&ret
);
487 int tls1_final_finish_mac(s
,in1_ctx
,in2_ctx
,str
,slen
,out
)
489 EVP_MD_CTX
*in1_ctx
,*in2_ctx
;
496 unsigned char buf
[TLS_MD_MAX_CONST_SIZE
+MD5_DIGEST_LENGTH
+SHA_DIGEST_LENGTH
];
497 unsigned char *q
,buf2
[12];
503 memcpy(&ctx
,in1_ctx
,sizeof(EVP_MD_CTX
));
504 EVP_DigestFinal(&ctx
,q
,&i
);
506 memcpy(&ctx
,in2_ctx
,sizeof(EVP_MD_CTX
));
507 EVP_DigestFinal(&ctx
,q
,&i
);
510 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,q
-buf
,
511 s
->session
->master_key
,s
->session
->master_key_length
,
513 memset(&ctx
,0,sizeof(EVP_MD_CTX
));
518 int tls1_mac(ssl
,md
,send
)
524 unsigned char *mac_sec
,*seq
;
526 unsigned int md_size
;
529 unsigned char buf
[5];
533 rec
= &(ssl
->s3
->wrec
);
534 mac_sec
= &(ssl
->s3
->write_mac_secret
[0]);
535 seq
= &(ssl
->s3
->write_sequence
[0]);
536 hash
=ssl
->write_hash
;
540 rec
= &(ssl
->s3
->rrec
);
541 mac_sec
= &(ssl
->s3
->read_mac_secret
[0]);
542 seq
= &(ssl
->s3
->read_sequence
[0]);
546 md_size
=EVP_MD_size(hash
);
549 buf
[1]=TLS1_VERSION_MAJOR
;
550 buf
[2]=TLS1_VERSION_MINOR
;
551 buf
[3]=rec
->length
>>8;
552 buf
[4]=rec
->length
&0xff;
554 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
555 HMAC_Init(&hmac
,mac_sec
,EVP_MD_size(hash
),hash
);
556 HMAC_Update(&hmac
,seq
,8);
557 HMAC_Update(&hmac
,buf
,5);
558 HMAC_Update(&hmac
,rec
->input
,rec
->length
);
559 HMAC_Final(&hmac
,md
,&md_size
);
563 {int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",mac_sec
[z
]); printf("\n"); }
565 {int z
; for (z
=0; z
<8; z
++) printf("%02X ",seq
[z
]); printf("\n"); }
567 {int z
; for (z
=0; z
<5; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
569 {int z
; for (z
=0; z
<rec
->length
; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
576 {int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",md
[z
]); printf("\n"); }
581 int tls1_generate_master_secret(s
,out
,p
,len
)
587 unsigned char buf
[SSL3_RANDOM_SIZE
*2+TLS_MD_MASTER_SECRET_CONST_SIZE
];
588 unsigned char buff
[SSL_MAX_MASTER_KEY_LENGTH
];
590 /* Setup the stuff to munge */
591 memcpy(buf
,TLS_MD_MASTER_SECRET_CONST
,
592 TLS_MD_MASTER_SECRET_CONST_SIZE
);
593 memcpy(&(buf
[TLS_MD_MASTER_SECRET_CONST_SIZE
]),
594 s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
595 memcpy(&(buf
[SSL3_RANDOM_SIZE
+TLS_MD_MASTER_SECRET_CONST_SIZE
]),
596 s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
597 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,
598 buf
,TLS_MD_MASTER_SECRET_CONST_SIZE
+SSL3_RANDOM_SIZE
*2,p
,len
,
599 s
->session
->master_key
,buff
,SSL3_MASTER_SECRET_SIZE
);
600 return(SSL3_MASTER_SECRET_SIZE
);
603 int tls1_alert_code(code
)
608 case SSL_AD_CLOSE_NOTIFY
: return(SSL3_AD_CLOSE_NOTIFY
);
609 case SSL_AD_UNEXPECTED_MESSAGE
: return(SSL3_AD_UNEXPECTED_MESSAGE
);
610 case SSL_AD_BAD_RECORD_MAC
: return(SSL3_AD_BAD_RECORD_MAC
);
611 case SSL_AD_DECRYPTION_FAILED
: return(TLS1_AD_DECRYPTION_FAILED
);
612 case SSL_AD_RECORD_OVERFLOW
: return(TLS1_AD_RECORD_OVERFLOW
);
613 case SSL_AD_DECOMPRESSION_FAILURE
:return(SSL3_AD_DECOMPRESSION_FAILURE
);
614 case SSL_AD_HANDSHAKE_FAILURE
: return(SSL3_AD_HANDSHAKE_FAILURE
);
615 case SSL_AD_NO_CERTIFICATE
: return(-1);
616 case SSL_AD_BAD_CERTIFICATE
: return(SSL3_AD_BAD_CERTIFICATE
);
617 case SSL_AD_UNSUPPORTED_CERTIFICATE
:return(SSL3_AD_UNSUPPORTED_CERTIFICATE
);
618 case SSL_AD_CERTIFICATE_REVOKED
:return(SSL3_AD_CERTIFICATE_REVOKED
);
619 case SSL_AD_CERTIFICATE_EXPIRED
:return(SSL3_AD_CERTIFICATE_EXPIRED
);
620 case SSL_AD_CERTIFICATE_UNKNOWN
:return(SSL3_AD_CERTIFICATE_UNKNOWN
);
621 case SSL_AD_ILLEGAL_PARAMETER
: return(SSL3_AD_ILLEGAL_PARAMETER
);
622 case SSL_AD_UNKNOWN_CA
: return(TLS1_AD_UNKNOWN_CA
);
623 case SSL_AD_ACCESS_DENIED
: return(TLS1_AD_ACCESS_DENIED
);
624 case SSL_AD_DECODE_ERROR
: return(TLS1_AD_DECODE_ERROR
);
625 case SSL_AD_DECRYPT_ERROR
: return(TLS1_AD_DECRYPT_ERROR
);
626 case SSL_AD_EXPORT_RESTRICION
: return(TLS1_AD_EXPORT_RESTRICION
);
627 case SSL_AD_PROTOCOL_VERSION
: return(TLS1_AD_PROTOCOL_VERSION
);
628 case SSL_AD_INSUFFICIENT_SECURITY
:return(TLS1_AD_INSUFFICIENT_SECURITY
);
629 case SSL_AD_INTERNAL_ERROR
: return(TLS1_AD_INTERNAL_ERROR
);
630 case SSL_AD_USER_CANCLED
: return(TLS1_AD_USER_CANCLED
);
631 case SSL_AD_NO_RENEGOTIATION
: return(TLS1_AD_NO_RENEGOTIATION
);