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.]
60 #include <openssl/objects.h>
61 #include <openssl/comp.h>
64 #define SSL_ENC_DES_IDX 0
65 #define SSL_ENC_3DES_IDX 1
66 #define SSL_ENC_RC4_IDX 2
67 #define SSL_ENC_RC2_IDX 3
68 #define SSL_ENC_IDEA_IDX 4
69 #define SSL_ENC_eFZA_IDX 5
70 #define SSL_ENC_NULL_IDX 6
71 #define SSL_ENC_NUM_IDX 7
73 static const EVP_CIPHER
*ssl_cipher_methods
[SSL_ENC_NUM_IDX
]={
74 NULL
,NULL
,NULL
,NULL
,NULL
,NULL
,
77 static STACK_OF(SSL_COMP
) *ssl_comp_methods
=NULL
;
79 #define SSL_MD_MD5_IDX 0
80 #define SSL_MD_SHA1_IDX 1
81 #define SSL_MD_NUM_IDX 2
82 static const EVP_MD
*ssl_digest_methods
[SSL_MD_NUM_IDX
]={
90 #define CIPHER_SPECIAL 5
92 typedef struct cipher_order_st
97 struct cipher_order_st
*next
,*prev
;
100 static const SSL_CIPHER cipher_aliases
[]={
101 /* Don't include eNULL unless specifically enabled */
102 {0,SSL_TXT_ALL
, 0,SSL_ALL
& ~SSL_eNULL
, SSL_ALL
,0,0,0,SSL_ALL
,SSL_ALL
}, /* must be first */
103 {0,SSL_TXT_kRSA
,0,SSL_kRSA
, 0,0,0,0,SSL_MKEY_MASK
,0},
104 {0,SSL_TXT_kDHr
,0,SSL_kDHr
, 0,0,0,0,SSL_MKEY_MASK
,0},
105 {0,SSL_TXT_kDHd
,0,SSL_kDHd
, 0,0,0,0,SSL_MKEY_MASK
,0},
106 {0,SSL_TXT_kEDH
,0,SSL_kEDH
, 0,0,0,0,SSL_MKEY_MASK
,0},
107 {0,SSL_TXT_kFZA
,0,SSL_kFZA
, 0,0,0,0,SSL_MKEY_MASK
,0},
108 {0,SSL_TXT_DH
, 0,SSL_DH
, 0,0,0,0,SSL_MKEY_MASK
,0},
109 {0,SSL_TXT_EDH
, 0,SSL_EDH
, 0,0,0,0,SSL_MKEY_MASK
|SSL_AUTH_MASK
,0},
111 {0,SSL_TXT_aRSA
,0,SSL_aRSA
, 0,0,0,0,SSL_AUTH_MASK
,0},
112 {0,SSL_TXT_aDSS
,0,SSL_aDSS
, 0,0,0,0,SSL_AUTH_MASK
,0},
113 {0,SSL_TXT_aFZA
,0,SSL_aFZA
, 0,0,0,0,SSL_AUTH_MASK
,0},
114 {0,SSL_TXT_aNULL
,0,SSL_aNULL
,0,0,0,0,SSL_AUTH_MASK
,0},
115 {0,SSL_TXT_aDH
, 0,SSL_aDH
, 0,0,0,0,SSL_AUTH_MASK
,0},
116 {0,SSL_TXT_DSS
, 0,SSL_DSS
, 0,0,0,0,SSL_AUTH_MASK
,0},
118 {0,SSL_TXT_DES
, 0,SSL_DES
, 0,0,0,0,SSL_ENC_MASK
,0},
119 {0,SSL_TXT_3DES
,0,SSL_3DES
, 0,0,0,0,SSL_ENC_MASK
,0},
120 {0,SSL_TXT_RC4
, 0,SSL_RC4
, 0,0,0,0,SSL_ENC_MASK
,0},
121 {0,SSL_TXT_RC2
, 0,SSL_RC2
, 0,0,0,0,SSL_ENC_MASK
,0},
122 {0,SSL_TXT_IDEA
,0,SSL_IDEA
, 0,0,0,0,SSL_ENC_MASK
,0},
123 {0,SSL_TXT_eNULL
,0,SSL_eNULL
,0,0,0,0,SSL_ENC_MASK
,0},
124 {0,SSL_TXT_eFZA
,0,SSL_eFZA
, 0,0,0,0,SSL_ENC_MASK
,0},
126 {0,SSL_TXT_MD5
, 0,SSL_MD5
, 0,0,0,0,SSL_MAC_MASK
,0},
127 {0,SSL_TXT_SHA1
,0,SSL_SHA1
, 0,0,0,0,SSL_MAC_MASK
,0},
128 {0,SSL_TXT_SHA
, 0,SSL_SHA
, 0,0,0,0,SSL_MAC_MASK
,0},
130 {0,SSL_TXT_NULL
,0,SSL_NULL
, 0,0,0,0,SSL_ENC_MASK
,0},
131 {0,SSL_TXT_RSA
, 0,SSL_RSA
, 0,0,0,0,SSL_AUTH_MASK
|SSL_MKEY_MASK
,0},
132 {0,SSL_TXT_ADH
, 0,SSL_ADH
, 0,0,0,0,SSL_AUTH_MASK
|SSL_MKEY_MASK
,0},
133 {0,SSL_TXT_FZA
, 0,SSL_FZA
, 0,0,0,0,SSL_AUTH_MASK
|SSL_MKEY_MASK
|SSL_ENC_MASK
,0},
135 {0,SSL_TXT_SSLV2
, 0,SSL_SSLV2
, 0,0,0,0,SSL_SSL_MASK
,0},
136 {0,SSL_TXT_SSLV3
, 0,SSL_SSLV3
, 0,0,0,0,SSL_SSL_MASK
,0},
137 {0,SSL_TXT_TLSV1
, 0,SSL_TLSV1
, 0,0,0,0,SSL_SSL_MASK
,0},
139 {0,SSL_TXT_EXP
,0, 0,SSL_EXPORT
, 0,0,0,0,SSL_EXP_MASK
},
140 {0,SSL_TXT_EXPORT
,0, 0,SSL_EXPORT
, 0,0,0,0,SSL_EXP_MASK
},
141 {0,SSL_TXT_EXP40
, 0, 0, SSL_EXP40
, 0,0,0,0,SSL_STRONG_MASK
},
142 {0,SSL_TXT_EXP56
, 0, 0, SSL_EXP56
, 0,0,0,0,SSL_STRONG_MASK
},
143 {0,SSL_TXT_LOW
, 0, 0, SSL_LOW
, 0,0,0,0,SSL_STRONG_MASK
},
144 {0,SSL_TXT_MEDIUM
,0, 0,SSL_MEDIUM
, 0,0,0,0,SSL_STRONG_MASK
},
145 {0,SSL_TXT_HIGH
, 0, 0, SSL_HIGH
, 0,0,0,0,SSL_STRONG_MASK
},
148 static int init_ciphers
=1;
150 static void load_ciphers(void)
153 ssl_cipher_methods
[SSL_ENC_DES_IDX
]=
154 EVP_get_cipherbyname(SN_des_cbc
);
155 ssl_cipher_methods
[SSL_ENC_3DES_IDX
]=
156 EVP_get_cipherbyname(SN_des_ede3_cbc
);
157 ssl_cipher_methods
[SSL_ENC_RC4_IDX
]=
158 EVP_get_cipherbyname(SN_rc4
);
159 ssl_cipher_methods
[SSL_ENC_RC2_IDX
]=
160 EVP_get_cipherbyname(SN_rc2_cbc
);
161 ssl_cipher_methods
[SSL_ENC_IDEA_IDX
]=
162 EVP_get_cipherbyname(SN_idea_cbc
);
164 ssl_digest_methods
[SSL_MD_MD5_IDX
]=
165 EVP_get_digestbyname(SN_md5
);
166 ssl_digest_methods
[SSL_MD_SHA1_IDX
]=
167 EVP_get_digestbyname(SN_sha1
);
170 int ssl_cipher_get_evp(SSL_SESSION
*s
, const EVP_CIPHER
**enc
,
171 const EVP_MD
**md
, SSL_COMP
**comp
)
177 if (c
== NULL
) return(0);
182 if (s
->compress_meth
== 0)
184 else if (ssl_comp_methods
== NULL
)
192 ctmp
.id
=s
->compress_meth
;
193 i
=sk_SSL_COMP_find(ssl_comp_methods
,&ctmp
);
195 *comp
=sk_SSL_COMP_value(ssl_comp_methods
,i
);
201 if ((enc
== NULL
) || (md
== NULL
)) return(0);
203 switch (c
->algorithms
& SSL_ENC_MASK
)
228 if ((i
< 0) || (i
> SSL_ENC_NUM_IDX
))
232 if (i
== SSL_ENC_NULL_IDX
)
235 *enc
=ssl_cipher_methods
[i
];
238 switch (c
->algorithms
& SSL_MAC_MASK
)
250 if ((i
< 0) || (i
> SSL_MD_NUM_IDX
))
253 *md
=ssl_digest_methods
[i
];
255 if ((*enc
!= NULL
) && (*md
!= NULL
))
261 #define ITEM_SEP(a) \
262 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
264 static void ll_append_tail(CIPHER_ORDER
**head
, CIPHER_ORDER
*curr
,
267 if (curr
== *tail
) return;
270 if (curr
->prev
!= NULL
)
271 curr
->prev
->next
=curr
->next
;
272 if (curr
->next
!= NULL
) /* should always be true */
273 curr
->next
->prev
=curr
->prev
;
280 static unsigned long ssl_cipher_get_disabled(void)
286 mask
|= SSL_aRSA
|SSL_kRSA
;
292 mask
|= SSL_kDHr
|SSL_kDHd
|SSL_kEDH
|SSL_aDH
;
295 #ifdef SSL_FORBID_ENULL
299 mask
|= (ssl_cipher_methods
[SSL_ENC_DES_IDX
] == NULL
) ? SSL_DES
:0;
300 mask
|= (ssl_cipher_methods
[SSL_ENC_3DES_IDX
] == NULL
) ? SSL_3DES
:0;
301 mask
|= (ssl_cipher_methods
[SSL_ENC_RC4_IDX
] == NULL
) ? SSL_RC4
:0;
302 mask
|= (ssl_cipher_methods
[SSL_ENC_RC2_IDX
] == NULL
) ? SSL_RC2
:0;
303 mask
|= (ssl_cipher_methods
[SSL_ENC_IDEA_IDX
] == NULL
) ? SSL_IDEA
:0;
304 mask
|= (ssl_cipher_methods
[SSL_ENC_eFZA_IDX
] == NULL
) ? SSL_eFZA
:0;
306 mask
|= (ssl_digest_methods
[SSL_MD_MD5_IDX
] == NULL
) ? SSL_MD5
:0;
307 mask
|= (ssl_digest_methods
[SSL_MD_SHA1_IDX
] == NULL
) ? SSL_SHA1
:0;
312 static void ssl_cipher_collect_ciphers(const SSL_METHOD
*ssl_method
,
313 int num_of_ciphers
, unsigned long mask
, CIPHER_ORDER
*list
,
314 CIPHER_ORDER
**head_p
, CIPHER_ORDER
**tail_p
)
320 * We have num_of_ciphers descriptions compiled in, depending on the
321 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
322 * These will later be sorted in a linked list with at most num
326 /* Get the initial list of ciphers */
327 list_num
= 0; /* actual count of ciphers */
328 for (i
= 0; i
< num_of_ciphers
; i
++)
330 c
= ssl_method
->get_cipher(i
);
331 /* drop those that use any of that is not available */
332 if ((c
!= NULL
) && c
->valid
&& !(c
->algorithms
& mask
))
334 list
[list_num
].cipher
= c
;
335 list
[list_num
].next
= NULL
;
336 list
[list_num
].prev
= NULL
;
337 list
[list_num
].active
= 0;
340 if (!sk_push(ca_list,(char *)c)) goto err;
346 * Prepare linked list from list entries
348 for (i
= 1; i
< list_num
- 1; i
++)
350 list
[i
].prev
= &(list
[i
-1]);
351 list
[i
].next
= &(list
[i
+1]);
355 (*head_p
) = &(list
[0]);
356 (*head_p
)->prev
= NULL
;
357 (*head_p
)->next
= &(list
[1]);
358 (*tail_p
) = &(list
[list_num
- 1]);
359 (*tail_p
)->prev
= &(list
[list_num
- 2]);
360 (*tail_p
)->next
= NULL
;
364 static void ssl_cipher_collect_aliases(SSL_CIPHER
**ca_list
,
365 int num_of_group_aliases
, unsigned long mask
,
368 CIPHER_ORDER
*ciph_curr
;
369 SSL_CIPHER
**ca_curr
;
373 * First, add the real ciphers as already collected
377 while (ciph_curr
!= NULL
)
379 *ca_curr
= ciph_curr
->cipher
;
381 ciph_curr
= ciph_curr
->next
;
385 * Now we add the available ones from the cipher_aliases[] table.
386 * They represent either an algorithm, that must be fully
387 * supported (not match any bit in mask) or represent a cipher
388 * strength value (will be added in any case because algorithms=0).
390 for (i
= 0; i
< num_of_group_aliases
; i
++)
392 if ((i
== 0) || /* always fetch "ALL" */
393 !(cipher_aliases
[i
].algorithms
& mask
))
395 *ca_curr
= (SSL_CIPHER
*)(cipher_aliases
+ i
);
400 *ca_curr
= NULL
; /* end of list */
403 static void ssl_cipher_apply_rule(unsigned long algorithms
, unsigned long mask
,
404 unsigned long algo_strength
, unsigned long mask_strength
,
405 int rule
, int strength_bits
, CIPHER_ORDER
*list
,
406 CIPHER_ORDER
**head_p
, CIPHER_ORDER
**tail_p
)
408 CIPHER_ORDER
*head
, *tail
, *curr
, *curr2
, *tail2
;
410 unsigned long ma
, ma_s
;
413 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
414 rule
, algorithms
, mask
, algo_strength
, mask_strength
,
418 curr
= head
= *head_p
;
420 tail2
= tail
= *tail_p
;
423 if ((curr
== NULL
) || (curr
== tail2
)) break;
430 * Selection criteria is either the number of strength_bits
431 * or the algorithm used.
433 if (strength_bits
== -1)
435 ma
= mask
& cp
->algorithms
;
436 ma_s
= mask_strength
& cp
->algo_strength
;
439 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp
->name
, cp
->algorithms
, cp
->algo_strength
, mask
, mask_strength
);
440 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma
, ma_s
, ma
&algorithms
, ma_s
&algo_strength
);
443 * Select: if none of the mask bit was met from the
444 * cipher or not all of the bits were met, the
445 * selection does not apply.
447 if (((ma
== 0) && (ma_s
== 0)) ||
448 ((ma
& algorithms
) != ma
) ||
449 ((ma_s
& algo_strength
) != ma_s
))
450 continue; /* does not apply */
452 else if (strength_bits
!= cp
->strength_bits
)
453 continue; /* does not apply */
456 printf("Action = %d\n", rule
);
459 /* add the cipher if it has not been added yet. */
460 if (rule
== CIPHER_ADD
)
464 ll_append_tail(&head
, curr
, &tail
);
468 /* Move the added cipher to this location */
469 else if (rule
== CIPHER_ORD
)
473 ll_append_tail(&head
, curr
, &tail
);
476 else if (rule
== CIPHER_DEL
)
478 else if (rule
== CIPHER_KILL
)
483 curr
->prev
->next
= curr
->next
;
487 if (curr
->next
!= NULL
)
488 curr
->next
->prev
= curr
->prev
;
489 if (curr
->prev
!= NULL
)
490 curr
->prev
->next
= curr
->next
;
500 static int ssl_cipher_strength_sort(CIPHER_ORDER
*list
, CIPHER_ORDER
**head_p
,
501 CIPHER_ORDER
**tail_p
)
503 int max_strength_bits
, i
, *number_uses
;
507 * This routine sorts the ciphers with descending strength. The sorting
508 * must keep the pre-sorted sequence, so we apply the normal sorting
509 * routine as '+' movement to the end of the list.
511 max_strength_bits
= 0;
516 (curr
->cipher
->strength_bits
> max_strength_bits
))
517 max_strength_bits
= curr
->cipher
->strength_bits
;
521 number_uses
= OPENSSL_malloc((max_strength_bits
+ 1) * sizeof(int));
524 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT
,ERR_R_MALLOC_FAILURE
);
527 memset(number_uses
, 0, (max_strength_bits
+ 1) * sizeof(int));
530 * Now find the strength_bits values actually used
536 number_uses
[curr
->cipher
->strength_bits
]++;
540 * Go through the list of used strength_bits values in descending
543 for (i
= max_strength_bits
; i
>= 0; i
--)
544 if (number_uses
[i
] > 0)
545 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD
, i
,
546 list
, head_p
, tail_p
);
548 OPENSSL_free(number_uses
);
552 static int ssl_cipher_process_rulestr(const char *rule_str
,
553 CIPHER_ORDER
*list
, CIPHER_ORDER
**head_p
,
554 CIPHER_ORDER
**tail_p
, SSL_CIPHER
**ca_list
)
556 unsigned long algorithms
, mask
, algo_strength
, mask_strength
;
557 const char *l
, *start
, *buf
;
558 int j
, multi
, found
, rule
, retval
, ok
, buflen
;
570 { rule
= CIPHER_DEL
; l
++; }
572 { rule
= CIPHER_ORD
; l
++; }
574 { rule
= CIPHER_KILL
; l
++; }
576 { rule
= CIPHER_SPECIAL
; l
++; }
578 { rule
= CIPHER_ADD
; }
586 algorithms
= mask
= algo_strength
= mask_strength
= 0;
594 #ifndef CHARSET_EBCDIC
595 while ( ((ch
>= 'A') && (ch
<= 'Z')) ||
596 ((ch
>= '0') && (ch
<= '9')) ||
597 ((ch
>= 'a') && (ch
<= 'z')) ||
600 while ( isalnum(ch
) || (ch
== '-'))
610 * We hit something we cannot deal with,
611 * it is no command or separator nor
612 * alphanumeric, so we call this an error.
614 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR
,
615 SSL_R_INVALID_COMMAND
);
621 if (rule
== CIPHER_SPECIAL
)
623 found
= 0; /* unused -- avoid compiler warning */
624 break; /* special treatment */
627 /* check for multi-part specification */
637 * Now search for the cipher alias in the ca_list. Be careful
638 * with the strncmp, because the "buflen" limitation
639 * will make the rule "ADH:SOME" and the cipher
640 * "ADH-MY-CIPHER" look like a match for buflen=3.
641 * So additionally check whether the cipher name found
642 * has the correct length. We can save a strlen() call:
643 * just checking for the '\0' at the right place is
644 * sufficient, we have to strncmp() anyway.
649 if ((ca_list
[j
]->name
[buflen
] == '\0') &&
650 !strncmp(buf
, ca_list
[j
]->name
, buflen
))
659 break; /* ignore this entry */
661 algorithms
|= ca_list
[j
]->algorithms
;
662 mask
|= ca_list
[j
]->mask
;
663 algo_strength
|= ca_list
[j
]->algo_strength
;
664 mask_strength
|= ca_list
[j
]->mask_strength
;
670 * Ok, we have the rule, now apply it
672 if (rule
== CIPHER_SPECIAL
)
673 { /* special command */
676 !strncmp(buf
, "STRENGTH", 8))
677 ok
= ssl_cipher_strength_sort(list
,
680 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR
,
681 SSL_R_INVALID_COMMAND
);
685 * We do not support any "multi" options
686 * together with "@", so throw away the
687 * rest of the command, if any left, until
688 * end or ':' is found.
690 while ((*l
!= '\0') && ITEM_SEP(*l
))
695 ssl_cipher_apply_rule(algorithms
, mask
,
696 algo_strength
, mask_strength
, rule
, -1,
697 list
, head_p
, tail_p
);
701 while ((*l
!= '\0') && ITEM_SEP(*l
))
704 if (*l
== '\0') break; /* done */
710 STACK_OF(SSL_CIPHER
) *ssl_create_cipher_list(const SSL_METHOD
*ssl_method
,
711 STACK_OF(SSL_CIPHER
) **cipher_list
,
712 STACK_OF(SSL_CIPHER
) **cipher_list_by_id
,
713 const char *rule_str
)
715 int ok
, num_of_ciphers
, num_of_alias_max
, num_of_group_aliases
;
716 unsigned long disabled_mask
;
717 STACK_OF(SSL_CIPHER
) *cipherstack
;
719 CIPHER_ORDER
*list
= NULL
, *head
= NULL
, *tail
= NULL
, *curr
;
720 SSL_CIPHER
**ca_list
= NULL
;
723 * Return with error if nothing to do.
725 if (rule_str
== NULL
) return(NULL
);
727 if (init_ciphers
) load_ciphers();
730 * To reduce the work to do we only want to process the compiled
731 * in algorithms, so we first get the mask of disabled ciphers.
733 disabled_mask
= ssl_cipher_get_disabled();
736 * Now we have to collect the available ciphers from the compiled
737 * in ciphers. We cannot get more than the number compiled in, so
738 * it is used for allocation.
740 num_of_ciphers
= ssl_method
->num_ciphers();
741 list
= (CIPHER_ORDER
*)OPENSSL_malloc(sizeof(CIPHER_ORDER
) * num_of_ciphers
);
744 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST
,ERR_R_MALLOC_FAILURE
);
745 return(NULL
); /* Failure */
748 ssl_cipher_collect_ciphers(ssl_method
, num_of_ciphers
, disabled_mask
,
752 * We also need cipher aliases for selecting based on the rule_str.
753 * There might be two types of entries in the rule_str: 1) names
754 * of ciphers themselves 2) aliases for groups of ciphers.
755 * For 1) we need the available ciphers and for 2) the cipher
756 * groups of cipher_aliases added together in one list (otherwise
757 * we would be happy with just the cipher_aliases table).
759 num_of_group_aliases
= sizeof(cipher_aliases
) / sizeof(SSL_CIPHER
);
760 num_of_alias_max
= num_of_ciphers
+ num_of_group_aliases
+ 1;
762 (SSL_CIPHER
**)OPENSSL_malloc(sizeof(SSL_CIPHER
*) * num_of_alias_max
);
766 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST
,ERR_R_MALLOC_FAILURE
);
767 return(NULL
); /* Failure */
769 ssl_cipher_collect_aliases(ca_list
, num_of_group_aliases
, disabled_mask
,
773 * If the rule_string begins with DEFAULT, apply the default rule
774 * before using the (possibly available) additional rules.
778 if (strncmp(rule_str
,"DEFAULT",7) == 0)
780 ok
= ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST
,
781 list
, &head
, &tail
, ca_list
);
787 if (ok
&& (strlen(rule_p
) > 0))
788 ok
= ssl_cipher_process_rulestr(rule_p
, list
, &head
, &tail
,
791 OPENSSL_free(ca_list
); /* Not needed anymore */
794 { /* Rule processing failure */
799 * Allocate new "cipherstack" for the result, return with error
800 * if we cannot get one.
802 if ((cipherstack
= sk_SSL_CIPHER_new_null()) == NULL
)
809 * The cipher selection for the list is done. The ciphers are added
810 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
812 for (curr
= head
; curr
!= NULL
; curr
= curr
->next
)
816 sk_SSL_CIPHER_push(cipherstack
, curr
->cipher
);
818 printf("<%s>\n",curr
->cipher
->name
);
822 OPENSSL_free(list
); /* Not needed any longer */
825 * The following passage is a little bit odd. If pointer variables
826 * were supplied to hold STACK_OF(SSL_CIPHER) return information,
827 * the old memory pointed to is free()ed. Then, however, the
828 * cipher_list entry will be assigned just a copy of the returned
829 * cipher stack. For cipher_list_by_id a copy of the cipher stack
830 * will be created. See next comment...
832 if (cipher_list
!= NULL
)
834 if (*cipher_list
!= NULL
)
835 sk_SSL_CIPHER_free(*cipher_list
);
836 *cipher_list
= cipherstack
;
839 if (cipher_list_by_id
!= NULL
)
841 if (*cipher_list_by_id
!= NULL
)
842 sk_SSL_CIPHER_free(*cipher_list_by_id
);
843 *cipher_list_by_id
= sk_SSL_CIPHER_dup(cipherstack
);
847 * Now it is getting really strange. If something failed during
848 * the previous pointer assignment or if one of the pointers was
849 * not requested, the error condition is met. That might be
850 * discussable. The strange thing is however that in this case
851 * the memory "ret" pointed to is "free()ed" and hence the pointer
852 * cipher_list becomes wild. The memory reserved for
853 * cipher_list_by_id however is not "free()ed" and stays intact.
855 if ( (cipher_list_by_id
== NULL
) ||
856 (*cipher_list_by_id
== NULL
) ||
857 (cipher_list
== NULL
) ||
858 (*cipher_list
== NULL
))
860 sk_SSL_CIPHER_free(cipherstack
);
864 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id
,ssl_cipher_ptr_id_cmp
);
869 char *SSL_CIPHER_description(SSL_CIPHER
*cipher
, char *buf
, int len
)
871 int is_export
,pkl
,kl
;
873 char *kx
,*au
,*enc
,*mac
;
874 unsigned long alg
,alg2
,alg_s
;
875 static char *format
="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
877 alg
=cipher
->algorithms
;
878 alg_s
=cipher
->algo_strength
;
879 alg2
=cipher
->algorithm2
;
881 is_export
=SSL_C_IS_EXPORT(cipher
);
882 pkl
=SSL_C_EXPORT_PKEYLENGTH(cipher
);
883 kl
=SSL_C_EXPORT_KEYLENGTH(cipher
);
884 exp
=is_export
?" export":"";
888 else if (alg
& SSL_SSLV3
)
893 switch (alg
&SSL_MKEY_MASK
)
896 kx
=is_export
?(pkl
== 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
908 kx
=is_export
?(pkl
== 512 ? "DH(512)" : "DH(1024)"):"DH";
914 switch (alg
&SSL_AUTH_MASK
)
934 switch (alg
&SSL_ENC_MASK
)
937 enc
=(is_export
&& kl
== 5)?"DES(40)":"DES(56)";
943 enc
=is_export
?(kl
== 5 ? "RC4(40)" : "RC4(56)")
944 :((alg2
&SSL2_CF_8_BYTE_ENC
)?"RC4(64)":"RC4(128)");
947 enc
=is_export
?(kl
== 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
963 switch (alg
&SSL_MAC_MASK
)
979 buf
=OPENSSL_malloc(len
);
980 if (buf
== NULL
) return("OPENSSL_malloc Error");
983 return("Buffer too small");
985 BIO_snprintf(buf
,len
,format
,cipher
->name
,ver
,kx
,au
,enc
,mac
,exp
);
989 char *SSL_CIPHER_get_version(SSL_CIPHER
*c
)
993 if (c
== NULL
) return("(NONE)");
996 return("TLSv1/SSLv3");
1003 /* return the actual cipher being used */
1004 const char *SSL_CIPHER_get_name(SSL_CIPHER
*c
)
1011 /* number of bits for symmetric cipher */
1012 int SSL_CIPHER_get_bits(SSL_CIPHER
*c
, int *alg_bits
)
1018 if (alg_bits
!= NULL
) *alg_bits
= c
->alg_bits
;
1019 ret
= c
->strength_bits
;
1024 SSL_COMP
*ssl3_comp_find(STACK_OF(SSL_COMP
) *sk
, int n
)
1029 if ((n
== 0) || (sk
== NULL
)) return(NULL
);
1030 nn
=sk_SSL_COMP_num(sk
);
1031 for (i
=0; i
<nn
; i
++)
1033 ctmp
=sk_SSL_COMP_value(sk
,i
);
1040 static int sk_comp_cmp(const SSL_COMP
* const *a
,
1041 const SSL_COMP
* const *b
)
1043 return((*a
)->id
-(*b
)->id
);
1046 STACK_OF(SSL_COMP
) *SSL_COMP_get_compression_methods(void)
1048 return(ssl_comp_methods
);
1051 int SSL_COMP_add_compression_method(int id
, COMP_METHOD
*cm
)
1054 STACK_OF(SSL_COMP
) *sk
;
1056 comp
=(SSL_COMP
*)OPENSSL_malloc(sizeof(SSL_COMP
));
1059 if (ssl_comp_methods
== NULL
)
1060 sk
=ssl_comp_methods
=sk_SSL_COMP_new(sk_comp_cmp
);
1062 sk
=ssl_comp_methods
;
1063 if ((sk
== NULL
) || !sk_SSL_COMP_push(sk
,comp
))
1065 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD
,ERR_R_MALLOC_FAILURE
);