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 #ifndef OPENSSL_NO_COMP
115 #include <openssl/comp.h>
117 #include <openssl/evp.h>
118 #include <openssl/hmac.h>
119 #include <openssl/md5.h>
121 #include <openssl/des.h>
124 static void tls1_P_hash(const EVP_MD
*md
, const unsigned char *sec
,
125 int sec_len
, unsigned char *seed
, int seed_len
,
126 unsigned char *out
, int olen
)
132 unsigned char A1
[EVP_MAX_MD_SIZE
];
135 chunk
=EVP_MD_size(md
);
138 HMAC_CTX_init(&ctx_tmp
);
139 HMAC_CTX_set_flags(&ctx
, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
);
140 HMAC_CTX_set_flags(&ctx_tmp
, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
);
141 HMAC_Init_ex(&ctx
,sec
,sec_len
,md
, NULL
);
142 HMAC_Init_ex(&ctx_tmp
,sec
,sec_len
,md
, NULL
);
143 HMAC_Update(&ctx
,seed
,seed_len
);
144 HMAC_Final(&ctx
,A1
,&A1_len
);
149 HMAC_Init_ex(&ctx
,NULL
,0,NULL
,NULL
); /* re-init */
150 HMAC_Init_ex(&ctx_tmp
,NULL
,0,NULL
,NULL
); /* re-init */
151 HMAC_Update(&ctx
,A1
,A1_len
);
152 HMAC_Update(&ctx_tmp
,A1
,A1_len
);
153 HMAC_Update(&ctx
,seed
,seed_len
);
157 HMAC_Final(&ctx
,out
,&j
);
160 HMAC_Final(&ctx_tmp
,A1
,&A1_len
); /* calc the next A1 value */
164 HMAC_Final(&ctx
,A1
,&A1_len
);
169 HMAC_CTX_cleanup(&ctx
);
170 HMAC_CTX_cleanup(&ctx_tmp
);
171 OPENSSL_cleanse(A1
,sizeof(A1
));
174 static void tls1_PRF(const EVP_MD
*md5
, const EVP_MD
*sha1
,
175 unsigned char *label
, int label_len
,
176 const unsigned char *sec
, int slen
, unsigned char *out1
,
177 unsigned char *out2
, int olen
)
180 const unsigned char *S1
,*S2
;
185 len
+=(slen
&1); /* add for odd, make longer */
188 tls1_P_hash(md5
,S1
,len
,label
,label_len
,out1
,olen
);
189 tls1_P_hash(sha1
,S2
,len
,label
,label_len
,out2
,olen
);
191 for (i
=0; i
<olen
; i
++)
195 static void tls1_generate_key_block(SSL
*s
, unsigned char *km
,
196 unsigned char *tmp
, int num
)
199 unsigned char buf
[SSL3_RANDOM_SIZE
*2+
200 TLS_MD_MAX_CONST_SIZE
];
203 memcpy(p
,TLS_MD_KEY_EXPANSION_CONST
,
204 TLS_MD_KEY_EXPANSION_CONST_SIZE
);
205 p
+=TLS_MD_KEY_EXPANSION_CONST_SIZE
;
206 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
208 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
211 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(p
-buf
),
212 s
->session
->master_key
,s
->session
->master_key_length
,
215 printf("tls1_generate_key_block() ==> %d byte master_key =\n\t",
216 s
->session
->master_key_length
);
219 for (i
=0; i
< s
->session
->master_key_length
; i
++)
221 printf("%02X", s
->session
->master_key
[i
]);
224 #endif /* KSSL_DEBUG */
227 int tls1_change_cipher_state(SSL
*s
, int which
)
229 static const unsigned char empty
[]="";
230 unsigned char *p
,*key_block
,*mac_secret
;
231 unsigned char *exp_label
,buf
[TLS_MD_MAX_CONST_SIZE
+
233 unsigned char tmp1
[EVP_MAX_KEY_LENGTH
];
234 unsigned char tmp2
[EVP_MAX_KEY_LENGTH
];
235 unsigned char iv1
[EVP_MAX_IV_LENGTH
*2];
236 unsigned char iv2
[EVP_MAX_IV_LENGTH
*2];
237 unsigned char *ms
,*key
,*iv
,*er1
,*er2
;
241 #ifndef OPENSSL_NO_COMP
242 const SSL_COMP
*comp
;
245 int is_export
,n
,i
,j
,k
,exp_label_len
,cl
;
248 is_export
=SSL_C_IS_EXPORT(s
->s3
->tmp
.new_cipher
);
249 c
=s
->s3
->tmp
.new_sym_enc
;
250 m
=s
->s3
->tmp
.new_hash
;
251 #ifndef OPENSSL_NO_COMP
252 comp
=s
->s3
->tmp
.new_compression
;
254 key_block
=s
->s3
->tmp
.key_block
;
257 printf("tls1_change_cipher_state(which= %d) w/\n", which
);
258 printf("\talg= %ld, comp= %p\n", s
->s3
->tmp
.new_cipher
->algorithms
,
260 printf("\tevp_cipher == %p ==? &d_cbc_ede_cipher3\n", (void *)c
);
261 printf("\tevp_cipher: nid, blksz= %d, %d, keylen=%d, ivlen=%d\n",
262 c
->nid
,c
->block_size
,c
->key_len
,c
->iv_len
);
263 printf("\tkey_block: len= %d, data= ", s
->s3
->tmp
.key_block_length
);
266 for (ki
=0; ki
<s
->s3
->tmp
.key_block_length
; ki
++)
267 printf("%02x", key_block
[ki
]); printf("\n");
269 #endif /* KSSL_DEBUG */
271 if (which
& SSL3_CC_READ
)
273 if (s
->enc_read_ctx
!= NULL
)
275 else if ((s
->enc_read_ctx
=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
)
278 /* make sure it's intialized in case we exit later with an error */
279 EVP_CIPHER_CTX_init(s
->enc_read_ctx
);
282 #ifndef OPENSSL_NO_COMP
283 if (s
->expand
!= NULL
)
285 COMP_CTX_free(s
->expand
);
290 s
->expand
=COMP_CTX_new(comp
->method
);
291 if (s
->expand
== NULL
)
293 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,SSL_R_COMPRESSION_LIBRARY_ERROR
);
296 if (s
->s3
->rrec
.comp
== NULL
)
297 s
->s3
->rrec
.comp
=(unsigned char *)
298 OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH
);
299 if (s
->s3
->rrec
.comp
== NULL
)
303 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
304 if (s
->version
!= DTLS1_VERSION
)
305 memset(&(s
->s3
->read_sequence
[0]),0,8);
306 mac_secret
= &(s
->s3
->read_mac_secret
[0]);
310 if (s
->enc_write_ctx
!= NULL
)
312 else if ((s
->enc_write_ctx
=OPENSSL_malloc(sizeof(EVP_CIPHER_CTX
))) == NULL
)
315 /* make sure it's intialized in case we exit later with an error */
316 EVP_CIPHER_CTX_init(s
->enc_write_ctx
);
317 dd
= s
->enc_write_ctx
;
319 #ifndef OPENSSL_NO_COMP
320 if (s
->compress
!= NULL
)
322 COMP_CTX_free(s
->compress
);
327 s
->compress
=COMP_CTX_new(comp
->method
);
328 if (s
->compress
== NULL
)
330 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,SSL_R_COMPRESSION_LIBRARY_ERROR
);
335 /* this is done by dtls1_reset_seq_numbers for DTLS1_VERSION */
336 if (s
->version
!= DTLS1_VERSION
)
337 memset(&(s
->s3
->write_sequence
[0]),0,8);
338 mac_secret
= &(s
->s3
->write_mac_secret
[0]);
342 EVP_CIPHER_CTX_cleanup(dd
);
344 p
=s
->s3
->tmp
.key_block
;
346 cl
=EVP_CIPHER_key_length(c
);
347 j
=is_export
? (cl
< SSL_C_EXPORT_KEYLENGTH(s
->s3
->tmp
.new_cipher
) ?
348 cl
: SSL_C_EXPORT_KEYLENGTH(s
->s3
->tmp
.new_cipher
)) : cl
;
349 /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */
350 k
=EVP_CIPHER_iv_length(c
);
351 er1
= &(s
->s3
->client_random
[0]);
352 er2
= &(s
->s3
->server_random
[0]);
353 if ( (which
== SSL3_CHANGE_CIPHER_CLIENT_WRITE
) ||
354 (which
== SSL3_CHANGE_CIPHER_SERVER_READ
))
357 key
= &(p
[ n
]); n
+=j
+j
;
358 iv
= &(p
[ n
]); n
+=k
+k
;
359 exp_label
=(unsigned char *)TLS_MD_CLIENT_WRITE_KEY_CONST
;
360 exp_label_len
=TLS_MD_CLIENT_WRITE_KEY_CONST_SIZE
;
366 ms
= &(p
[ n
]); n
+=i
+j
;
367 key
= &(p
[ n
]); n
+=j
+k
;
369 exp_label
=(unsigned char *)TLS_MD_SERVER_WRITE_KEY_CONST
;
370 exp_label_len
=TLS_MD_SERVER_WRITE_KEY_CONST_SIZE
;
374 if (n
> s
->s3
->tmp
.key_block_length
)
376 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,ERR_R_INTERNAL_ERROR
);
380 memcpy(mac_secret
,ms
,i
);
382 printf("which = %04X\nmac key=",which
);
383 { int z
; for (z
=0; z
<i
; z
++) printf("%02X%c",ms
[z
],((z
+1)%16)?' ':'\n'); }
387 /* In here I set both the read and write key/iv to the
388 * same value since only the correct one will be used :-).
391 memcpy(p
,exp_label
,exp_label_len
);
393 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
395 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
397 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(p
-buf
),key
,j
,
398 tmp1
,tmp2
,EVP_CIPHER_key_length(c
));
404 memcpy(p
,TLS_MD_IV_BLOCK_CONST
,
405 TLS_MD_IV_BLOCK_CONST_SIZE
);
406 p
+=TLS_MD_IV_BLOCK_CONST_SIZE
;
407 memcpy(p
,s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
409 memcpy(p
,s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
411 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,p
-buf
,empty
,0,
420 s
->session
->key_arg_length
=0;
424 printf("EVP_CipherInit_ex(dd,c,key=,iv=,which)\n");
426 for (ki
=0; ki
<c
->key_len
; ki
++) printf("%02x", key
[ki
]);
429 for (ki
=0; ki
<c
->iv_len
; ki
++) printf("%02x", iv
[ki
]);
432 #endif /* KSSL_DEBUG */
434 EVP_CipherInit_ex(dd
,c
,NULL
,key
,iv
,(which
& SSL3_CC_WRITE
));
436 printf("which = %04X\nkey=",which
);
437 { int z
; for (z
=0; z
<EVP_CIPHER_key_length(c
); z
++) printf("%02X%c",key
[z
],((z
+1)%16)?' ':'\n'); }
439 { int z
; for (z
=0; z
<k
; z
++) printf("%02X%c",iv
[z
],((z
+1)%16)?' ':'\n'); }
443 OPENSSL_cleanse(tmp1
,sizeof(tmp1
));
444 OPENSSL_cleanse(tmp2
,sizeof(tmp1
));
445 OPENSSL_cleanse(iv1
,sizeof(iv1
));
446 OPENSSL_cleanse(iv2
,sizeof(iv2
));
449 SSLerr(SSL_F_TLS1_CHANGE_CIPHER_STATE
,ERR_R_MALLOC_FAILURE
);
454 int tls1_setup_key_block(SSL
*s
)
456 unsigned char *p1
,*p2
;
463 printf ("tls1_setup_key_block()\n");
464 #endif /* KSSL_DEBUG */
466 if (s
->s3
->tmp
.key_block_length
!= 0)
469 if (!ssl_cipher_get_evp(s
->session
,&c
,&hash
,&comp
))
471 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,SSL_R_CIPHER_OR_HASH_UNAVAILABLE
);
475 s
->s3
->tmp
.new_sym_enc
=c
;
476 s
->s3
->tmp
.new_hash
=hash
;
478 num
=EVP_CIPHER_key_length(c
)+EVP_MD_size(hash
)+EVP_CIPHER_iv_length(c
);
481 ssl3_cleanup_key_block(s
);
483 if ((p1
=(unsigned char *)OPENSSL_malloc(num
)) == NULL
)
485 if ((p2
=(unsigned char *)OPENSSL_malloc(num
)) == NULL
)
488 s
->s3
->tmp
.key_block_length
=num
;
489 s
->s3
->tmp
.key_block
=p1
;
493 printf("client random\n");
494 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->client_random
[z
],((z
+1)%16)?' ':'\n'); }
495 printf("server random\n");
496 { int z
; for (z
=0; z
<SSL3_RANDOM_SIZE
; z
++) printf("%02X%c",s
->s3
->server_random
[z
],((z
+1)%16)?' ':'\n'); }
497 printf("pre-master\n");
498 { int z
; for (z
=0; z
<s
->session
->master_key_length
; z
++) printf("%02X%c",s
->session
->master_key
[z
],((z
+1)%16)?' ':'\n'); }
500 tls1_generate_key_block(s
,p1
,p2
,num
);
501 OPENSSL_cleanse(p2
,num
);
504 printf("\nkey block\n");
505 { int z
; for (z
=0; z
<num
; z
++) printf("%02X%c",p1
[z
],((z
+1)%16)?' ':'\n'); }
508 if (!(s
->options
& SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
))
510 /* enable vulnerability countermeasure for CBC ciphers with
511 * known-IV problem (http://www.openssl.org/~bodo/tls-cbc.txt)
513 s
->s3
->need_empty_fragments
= 1;
515 if (s
->session
->cipher
!= NULL
)
517 if ((s
->session
->cipher
->algorithms
& SSL_ENC_MASK
) == SSL_eNULL
)
518 s
->s3
->need_empty_fragments
= 0;
520 #ifndef OPENSSL_NO_RC4
521 if ((s
->session
->cipher
->algorithms
& SSL_ENC_MASK
) == SSL_RC4
)
522 s
->s3
->need_empty_fragments
= 0;
529 SSLerr(SSL_F_TLS1_SETUP_KEY_BLOCK
,ERR_R_MALLOC_FAILURE
);
533 int tls1_enc(SSL
*s
, int send
)
539 const EVP_CIPHER
*enc
;
543 if (s
->write_hash
!= NULL
)
544 n
=EVP_MD_size(s
->write_hash
);
547 if (s
->enc_write_ctx
== NULL
)
550 enc
=EVP_CIPHER_CTX_cipher(s
->enc_write_ctx
);
554 if (s
->read_hash
!= NULL
)
555 n
=EVP_MD_size(s
->read_hash
);
558 if (s
->enc_read_ctx
== NULL
)
561 enc
=EVP_CIPHER_CTX_cipher(s
->enc_read_ctx
);
565 printf("tls1_enc(%d)\n", send
);
566 #endif /* KSSL_DEBUG */
568 if ((s
->session
== NULL
) || (ds
== NULL
) ||
571 memmove(rec
->data
,rec
->input
,rec
->length
);
572 rec
->input
=rec
->data
;
577 bs
=EVP_CIPHER_block_size(ds
->cipher
);
579 if ((bs
!= 1) && send
)
583 /* Add weird padding of upto 256 bytes */
585 /* we need to add 'i' padding bytes of value j */
587 if (s
->options
& SSL_OP_TLS_BLOCK_PADDING_BUG
)
589 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
592 for (k
=(int)l
; k
<(int)(l
+i
); k
++)
601 printf("EVP_Cipher(ds=%p,rec->data=%p,rec->input=%p,l=%ld) ==>\n",
602 (void *)ds
,rec
->data
,rec
->input
,l
);
603 printf("\tEVP_CIPHER_CTX: %d buf_len, %d key_len [%ld %ld], %d iv_len\n",
604 ds
->buf_len
, ds
->cipher
->key_len
,
605 (unsigned long)DES_KEY_SZ
,
606 (unsigned long)DES_SCHEDULE_SZ
,
609 for (i
=0; i
<ds
->cipher
->iv_len
; i
++) printf("%02X", ds
->iv
[i
]);
611 printf("\trec->input=");
612 for (ui
=0; ui
<l
; ui
++) printf(" %02x", rec
->input
[ui
]);
615 #endif /* KSSL_DEBUG */
619 if (l
== 0 || l
%bs
!= 0)
621 SSLerr(SSL_F_TLS1_ENC
,SSL_R_BLOCK_CIPHER_PAD_IS_WRONG
);
622 ssl3_send_alert(s
,SSL3_AL_FATAL
,SSL_AD_DECRYPTION_FAILED
);
627 EVP_Cipher(ds
,rec
->data
,rec
->input
,l
);
632 printf("\trec->data=");
633 for (ki
=0; ki
<l
; i
++)
634 printf(" %02x", rec
->data
[ki
]); printf("\n");
636 #endif /* KSSL_DEBUG */
638 if ((bs
!= 1) && !send
)
640 ii
=i
=rec
->data
[l
-1]; /* padding_length */
642 /* NB: if compression is in operation the first packet
643 * may not be of even length so the padding bug check
644 * cannot be performed. This bug workaround has been
645 * around since SSLeay so hopefully it is either fixed
646 * now or no buggy implementation supports compression
649 if ( (s
->options
&SSL_OP_TLS_BLOCK_PADDING_BUG
)
652 /* First packet is even in size, so check */
653 if ((memcmp(s
->s3
->read_sequence
,
654 "\0\0\0\0\0\0\0\0",8) == 0) && !(ii
& 1))
655 s
->s3
->flags
|=TLS1_FLAGS_TLS_PADDING_BUG
;
656 if (s
->s3
->flags
& TLS1_FLAGS_TLS_PADDING_BUG
)
659 /* TLS 1.0 does not bound the number of padding bytes by the block size.
660 * All of them must have value 'padding_length'. */
661 if (i
> (int)rec
->length
)
663 /* Incorrect padding. SSLerr() and ssl3_alert are done
664 * by caller: we don't want to reveal whether this is
665 * a decryption error or a MAC verification failure
666 * (see http://www.openssl.org/~bodo/tls-cbc.txt) */
669 for (j
=(int)(l
-i
); j
<(int)l
; j
++)
671 if (rec
->data
[j
] != ii
)
673 /* Incorrect padding */
683 int tls1_cert_verify_mac(SSL
*s
, EVP_MD_CTX
*in_ctx
, unsigned char *out
)
688 EVP_MD_CTX_init(&ctx
);
689 EVP_MD_CTX_copy_ex(&ctx
,in_ctx
);
690 EVP_DigestFinal_ex(&ctx
,out
,&ret
);
691 EVP_MD_CTX_cleanup(&ctx
);
695 int tls1_final_finish_mac(SSL
*s
, EVP_MD_CTX
*in1_ctx
, EVP_MD_CTX
*in2_ctx
,
696 const char *str
, int slen
, unsigned char *out
)
700 unsigned char buf
[TLS_MD_MAX_CONST_SIZE
+MD5_DIGEST_LENGTH
+SHA_DIGEST_LENGTH
];
701 unsigned char *q
,buf2
[12];
707 EVP_MD_CTX_init(&ctx
);
708 EVP_MD_CTX_copy_ex(&ctx
,in1_ctx
);
709 EVP_DigestFinal_ex(&ctx
,q
,&i
);
711 EVP_MD_CTX_copy_ex(&ctx
,in2_ctx
);
712 EVP_DigestFinal_ex(&ctx
,q
,&i
);
715 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,buf
,(int)(q
-buf
),
716 s
->session
->master_key
,s
->session
->master_key_length
,
717 out
,buf2
,sizeof buf2
);
718 EVP_MD_CTX_cleanup(&ctx
);
723 int tls1_mac(SSL
*ssl
, unsigned char *md
, int send
)
726 unsigned char *mac_sec
,*seq
;
728 unsigned int md_size
;
731 unsigned char buf
[5];
735 rec
= &(ssl
->s3
->wrec
);
736 mac_sec
= &(ssl
->s3
->write_mac_secret
[0]);
737 seq
= &(ssl
->s3
->write_sequence
[0]);
738 hash
=ssl
->write_hash
;
742 rec
= &(ssl
->s3
->rrec
);
743 mac_sec
= &(ssl
->s3
->read_mac_secret
[0]);
744 seq
= &(ssl
->s3
->read_sequence
[0]);
748 md_size
=EVP_MD_size(hash
);
751 if (ssl
->version
== DTLS1_VERSION
&& ssl
->client_version
== DTLS1_BAD_VER
)
753 buf
[1]=TLS1_VERSION_MAJOR
;
754 buf
[2]=TLS1_VERSION_MINOR
;
757 buf
[1]=(unsigned char)(ssl
->version
>>8);
758 buf
[2]=(unsigned char)(ssl
->version
);
761 buf
[3]=rec
->length
>>8;
762 buf
[4]=rec
->length
&0xff;
764 /* I should fix this up TLS TLS TLS TLS TLS XXXXXXXX */
765 HMAC_CTX_init(&hmac
);
766 HMAC_Init_ex(&hmac
,mac_sec
,EVP_MD_size(hash
),hash
,NULL
);
768 if (ssl
->version
== DTLS1_VERSION
&& ssl
->client_version
!= DTLS1_BAD_VER
)
770 unsigned char dtlsseq
[8],*p
=dtlsseq
;
772 s2n(send
?ssl
->d1
->w_epoch
:ssl
->d1
->r_epoch
, p
);
773 memcpy (p
,&seq
[2],6);
775 HMAC_Update(&hmac
,dtlsseq
,8);
778 HMAC_Update(&hmac
,seq
,8);
780 HMAC_Update(&hmac
,buf
,5);
781 HMAC_Update(&hmac
,rec
->input
,rec
->length
);
782 HMAC_Final(&hmac
,md
,&md_size
);
783 HMAC_CTX_cleanup(&hmac
);
787 {unsigned int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",mac_sec
[z
]); printf("\n"); }
789 {int z
; for (z
=0; z
<8; z
++) printf("%02X ",seq
[z
]); printf("\n"); }
791 {int z
; for (z
=0; z
<5; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
793 {unsigned int z
; for (z
=0; z
<rec
->length
; z
++) printf("%02X ",buf
[z
]); printf("\n"); }
796 if ( SSL_version(ssl
) != DTLS1_VERSION
)
801 if (seq
[i
] != 0) break;
806 {unsigned int z
; for (z
=0; z
<md_size
; z
++) printf("%02X ",md
[z
]); printf("\n"); }
811 int tls1_generate_master_secret(SSL
*s
, unsigned char *out
, unsigned char *p
,
814 unsigned char buf
[SSL3_RANDOM_SIZE
*2+TLS_MD_MASTER_SECRET_CONST_SIZE
];
815 unsigned char buff
[SSL_MAX_MASTER_KEY_LENGTH
];
818 printf ("tls1_generate_master_secret(%p,%p, %p, %d)\n", (void *)s
,out
, p
,len
);
819 #endif /* KSSL_DEBUG */
821 /* Setup the stuff to munge */
822 memcpy(buf
,TLS_MD_MASTER_SECRET_CONST
,
823 TLS_MD_MASTER_SECRET_CONST_SIZE
);
824 memcpy(&(buf
[TLS_MD_MASTER_SECRET_CONST_SIZE
]),
825 s
->s3
->client_random
,SSL3_RANDOM_SIZE
);
826 memcpy(&(buf
[SSL3_RANDOM_SIZE
+TLS_MD_MASTER_SECRET_CONST_SIZE
]),
827 s
->s3
->server_random
,SSL3_RANDOM_SIZE
);
828 tls1_PRF(s
->ctx
->md5
,s
->ctx
->sha1
,
829 buf
,TLS_MD_MASTER_SECRET_CONST_SIZE
+SSL3_RANDOM_SIZE
*2,p
,len
,
830 s
->session
->master_key
,buff
,sizeof buff
);
832 printf ("tls1_generate_master_secret() complete\n");
833 #endif /* KSSL_DEBUG */
834 return(SSL3_MASTER_SECRET_SIZE
);
837 int tls1_alert_code(int code
)
841 case SSL_AD_CLOSE_NOTIFY
: return(SSL3_AD_CLOSE_NOTIFY
);
842 case SSL_AD_UNEXPECTED_MESSAGE
: return(SSL3_AD_UNEXPECTED_MESSAGE
);
843 case SSL_AD_BAD_RECORD_MAC
: return(SSL3_AD_BAD_RECORD_MAC
);
844 case SSL_AD_DECRYPTION_FAILED
: return(TLS1_AD_DECRYPTION_FAILED
);
845 case SSL_AD_RECORD_OVERFLOW
: return(TLS1_AD_RECORD_OVERFLOW
);
846 case SSL_AD_DECOMPRESSION_FAILURE
:return(SSL3_AD_DECOMPRESSION_FAILURE
);
847 case SSL_AD_HANDSHAKE_FAILURE
: return(SSL3_AD_HANDSHAKE_FAILURE
);
848 case SSL_AD_NO_CERTIFICATE
: return(-1);
849 case SSL_AD_BAD_CERTIFICATE
: return(SSL3_AD_BAD_CERTIFICATE
);
850 case SSL_AD_UNSUPPORTED_CERTIFICATE
:return(SSL3_AD_UNSUPPORTED_CERTIFICATE
);
851 case SSL_AD_CERTIFICATE_REVOKED
:return(SSL3_AD_CERTIFICATE_REVOKED
);
852 case SSL_AD_CERTIFICATE_EXPIRED
:return(SSL3_AD_CERTIFICATE_EXPIRED
);
853 case SSL_AD_CERTIFICATE_UNKNOWN
:return(SSL3_AD_CERTIFICATE_UNKNOWN
);
854 case SSL_AD_ILLEGAL_PARAMETER
: return(SSL3_AD_ILLEGAL_PARAMETER
);
855 case SSL_AD_UNKNOWN_CA
: return(TLS1_AD_UNKNOWN_CA
);
856 case SSL_AD_ACCESS_DENIED
: return(TLS1_AD_ACCESS_DENIED
);
857 case SSL_AD_DECODE_ERROR
: return(TLS1_AD_DECODE_ERROR
);
858 case SSL_AD_DECRYPT_ERROR
: return(TLS1_AD_DECRYPT_ERROR
);
859 case SSL_AD_EXPORT_RESTRICTION
: return(TLS1_AD_EXPORT_RESTRICTION
);
860 case SSL_AD_PROTOCOL_VERSION
: return(TLS1_AD_PROTOCOL_VERSION
);
861 case SSL_AD_INSUFFICIENT_SECURITY
:return(TLS1_AD_INSUFFICIENT_SECURITY
);
862 case SSL_AD_INTERNAL_ERROR
: return(TLS1_AD_INTERNAL_ERROR
);
863 case SSL_AD_USER_CANCELLED
: return(TLS1_AD_USER_CANCELLED
);
864 case SSL_AD_NO_RENEGOTIATION
: return(TLS1_AD_NO_RENEGOTIATION
);
865 #ifdef DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
866 case DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
: return
867 (DTLS1_AD_MISSING_HANDSHAKE_MESSAGE
);