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_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */
104 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0},
105 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0},
106 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0},
107 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0},
108 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0},
109 {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0},
110 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0},
112 {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */
113 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0},
114 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0},
115 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0},
116 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0},
117 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0},
118 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0},
120 {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0},
121 {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0},
122 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0},
123 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0},
124 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
125 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
126 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
128 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
129 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
130 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
132 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
133 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
134 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
135 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
136 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
138 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
139 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
140 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
142 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
143 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
144 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
145 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
146 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
147 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
148 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
151 static int init_ciphers=1;
153 static void load_ciphers(void)
156 ssl_cipher_methods[SSL_ENC_DES_IDX]=
157 EVP_get_cipherbyname(SN_des_cbc);
158 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
159 EVP_get_cipherbyname(SN_des_ede3_cbc);
160 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
161 EVP_get_cipherbyname(SN_rc4);
162 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
163 EVP_get_cipherbyname(SN_rc2_cbc);
164 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
165 EVP_get_cipherbyname(SN_idea_cbc);
167 ssl_digest_methods[SSL_MD_MD5_IDX]=
168 EVP_get_digestbyname(SN_md5);
169 ssl_digest_methods[SSL_MD_SHA1_IDX]=
170 EVP_get_digestbyname(SN_sha1);
173 int ssl_cipher_get_evp(SSL_SESSION *s, const EVP_CIPHER **enc,
174 const EVP_MD **md, SSL_COMP **comp)
180 if (c == NULL) return(0);
185 if (s->compress_meth == 0)
187 else if (ssl_comp_methods == NULL)
195 ctmp.id=s->compress_meth;
196 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
198 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
204 if ((enc == NULL) || (md == NULL)) return(0);
206 switch (c->algorithms & SSL_ENC_MASK)
231 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
235 if (i == SSL_ENC_NULL_IDX)
238 *enc=ssl_cipher_methods[i];
241 switch (c->algorithms & SSL_MAC_MASK)
253 if ((i < 0) || (i > SSL_MD_NUM_IDX))
256 *md=ssl_digest_methods[i];
258 if ((*enc != NULL) && (*md != NULL))
264 #define ITEM_SEP(a) \
265 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
267 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
270 if (curr == *tail) return;
273 if (curr->prev != NULL)
274 curr->prev->next=curr->next;
275 if (curr->next != NULL) /* should always be true */
276 curr->next->prev=curr->prev;
283 static unsigned long ssl_cipher_get_disabled(void)
289 mask |= SSL_aRSA|SSL_kRSA;
295 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
298 mask |= SSL_kKRB5|SSL_aKRB5;
301 #ifdef SSL_FORBID_ENULL
305 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
306 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
307 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
308 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
309 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
310 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
312 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
313 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
318 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
319 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *list,
320 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
326 * We have num_of_ciphers descriptions compiled in, depending on the
327 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
328 * These will later be sorted in a linked list with at most num
332 /* Get the initial list of ciphers */
333 list_num = 0; /* actual count of ciphers */
334 for (i = 0; i < num_of_ciphers; i++)
336 c = ssl_method->get_cipher(i);
337 /* drop those that use any of that is not available */
338 if ((c != NULL) && c->valid && !(c->algorithms & mask))
340 list[list_num].cipher = c;
341 list[list_num].next = NULL;
342 list[list_num].prev = NULL;
343 list[list_num].active = 0;
346 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
347 #endif /* KSSL_DEBUG */
349 if (!sk_push(ca_list,(char *)c)) goto err;
355 * Prepare linked list from list entries
357 for (i = 1; i < list_num - 1; i++)
359 list[i].prev = &(list[i-1]);
360 list[i].next = &(list[i+1]);
364 (*head_p) = &(list[0]);
365 (*head_p)->prev = NULL;
366 (*head_p)->next = &(list[1]);
367 (*tail_p) = &(list[list_num - 1]);
368 (*tail_p)->prev = &(list[list_num - 2]);
369 (*tail_p)->next = NULL;
373 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
374 int num_of_group_aliases, unsigned long mask,
377 CIPHER_ORDER *ciph_curr;
378 SSL_CIPHER **ca_curr;
382 * First, add the real ciphers as already collected
386 while (ciph_curr != NULL)
388 *ca_curr = ciph_curr->cipher;
390 ciph_curr = ciph_curr->next;
394 * Now we add the available ones from the cipher_aliases[] table.
395 * They represent either an algorithm, that must be fully
396 * supported (not match any bit in mask) or represent a cipher
397 * strength value (will be added in any case because algorithms=0).
399 for (i = 0; i < num_of_group_aliases; i++)
401 if ((i == 0) || /* always fetch "ALL" */
402 !(cipher_aliases[i].algorithms & mask))
404 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
409 *ca_curr = NULL; /* end of list */
412 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
413 unsigned long algo_strength, unsigned long mask_strength,
414 int rule, int strength_bits, CIPHER_ORDER *list,
415 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
417 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
419 unsigned long ma, ma_s;
422 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
423 rule, algorithms, mask, algo_strength, mask_strength,
427 curr = head = *head_p;
429 tail2 = tail = *tail_p;
432 if ((curr == NULL) || (curr == tail2)) break;
439 * Selection criteria is either the number of strength_bits
440 * or the algorithm used.
442 if (strength_bits == -1)
444 ma = mask & cp->algorithms;
445 ma_s = mask_strength & cp->algo_strength;
448 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
449 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
452 * Select: if none of the mask bit was met from the
453 * cipher or not all of the bits were met, the
454 * selection does not apply.
456 if (((ma == 0) && (ma_s == 0)) ||
457 ((ma & algorithms) != ma) ||
458 ((ma_s & algo_strength) != ma_s))
459 continue; /* does not apply */
461 else if (strength_bits != cp->strength_bits)
462 continue; /* does not apply */
465 printf("Action = %d\n", rule);
468 /* add the cipher if it has not been added yet. */
469 if (rule == CIPHER_ADD)
473 ll_append_tail(&head, curr, &tail);
477 /* Move the added cipher to this location */
478 else if (rule == CIPHER_ORD)
482 ll_append_tail(&head, curr, &tail);
485 else if (rule == CIPHER_DEL)
487 else if (rule == CIPHER_KILL)
492 curr->prev->next = curr->next;
496 if (curr->next != NULL)
497 curr->next->prev = curr->prev;
498 if (curr->prev != NULL)
499 curr->prev->next = curr->next;
509 static int ssl_cipher_strength_sort(CIPHER_ORDER *list, CIPHER_ORDER **head_p,
510 CIPHER_ORDER **tail_p)
512 int max_strength_bits, i, *number_uses;
516 * This routine sorts the ciphers with descending strength. The sorting
517 * must keep the pre-sorted sequence, so we apply the normal sorting
518 * routine as '+' movement to the end of the list.
520 max_strength_bits = 0;
525 (curr->cipher->strength_bits > max_strength_bits))
526 max_strength_bits = curr->cipher->strength_bits;
530 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
533 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
536 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
539 * Now find the strength_bits values actually used
545 number_uses[curr->cipher->strength_bits]++;
549 * Go through the list of used strength_bits values in descending
552 for (i = max_strength_bits; i >= 0; i--)
553 if (number_uses[i] > 0)
554 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
555 list, head_p, tail_p);
557 OPENSSL_free(number_uses);
561 static int ssl_cipher_process_rulestr(const char *rule_str,
562 CIPHER_ORDER *list, CIPHER_ORDER **head_p,
563 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
565 unsigned long algorithms, mask, algo_strength, mask_strength;
566 const char *l, *start, *buf;
567 int j, multi, found, rule, retval, ok, buflen;
579 { rule = CIPHER_DEL; l++; }
581 { rule = CIPHER_ORD; l++; }
583 { rule = CIPHER_KILL; l++; }
585 { rule = CIPHER_SPECIAL; l++; }
587 { rule = CIPHER_ADD; }
595 algorithms = mask = algo_strength = mask_strength = 0;
603 #ifndef CHARSET_EBCDIC
604 while ( ((ch >= 'A') && (ch <= 'Z')) ||
605 ((ch >= '0') && (ch <= '9')) ||
606 ((ch >= 'a') && (ch <= 'z')) ||
609 while ( isalnum(ch) || (ch == '-'))
619 * We hit something we cannot deal with,
620 * it is no command or separator nor
621 * alphanumeric, so we call this an error.
623 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
624 SSL_R_INVALID_COMMAND);
630 if (rule == CIPHER_SPECIAL)
632 found = 0; /* unused -- avoid compiler warning */
633 break; /* special treatment */
636 /* check for multi-part specification */
646 * Now search for the cipher alias in the ca_list. Be careful
647 * with the strncmp, because the "buflen" limitation
648 * will make the rule "ADH:SOME" and the cipher
649 * "ADH-MY-CIPHER" look like a match for buflen=3.
650 * So additionally check whether the cipher name found
651 * has the correct length. We can save a strlen() call:
652 * just checking for the '\0' at the right place is
653 * sufficient, we have to strncmp() anyway.
658 if ((ca_list[j]->name[buflen] == '\0') &&
659 !strncmp(buf, ca_list[j]->name, buflen))
668 break; /* ignore this entry */
670 algorithms |= ca_list[j]->algorithms;
671 mask |= ca_list[j]->mask;
672 algo_strength |= ca_list[j]->algo_strength;
673 mask_strength |= ca_list[j]->mask_strength;
679 * Ok, we have the rule, now apply it
681 if (rule == CIPHER_SPECIAL)
682 { /* special command */
685 !strncmp(buf, "STRENGTH", 8))
686 ok = ssl_cipher_strength_sort(list,
689 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
690 SSL_R_INVALID_COMMAND);
694 * We do not support any "multi" options
695 * together with "@", so throw away the
696 * rest of the command, if any left, until
697 * end or ':' is found.
699 while ((*l != '\0') && ITEM_SEP(*l))
704 ssl_cipher_apply_rule(algorithms, mask,
705 algo_strength, mask_strength, rule, -1,
706 list, head_p, tail_p);
710 while ((*l != '\0') && ITEM_SEP(*l))
713 if (*l == '\0') break; /* done */
719 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
720 STACK_OF(SSL_CIPHER) **cipher_list,
721 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
722 const char *rule_str)
724 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
725 unsigned long disabled_mask;
726 STACK_OF(SSL_CIPHER) *cipherstack;
728 CIPHER_ORDER *list = NULL, *head = NULL, *tail = NULL, *curr;
729 SSL_CIPHER **ca_list = NULL;
732 * Return with error if nothing to do.
734 if (rule_str == NULL) return(NULL);
736 if (init_ciphers) load_ciphers();
739 * To reduce the work to do we only want to process the compiled
740 * in algorithms, so we first get the mask of disabled ciphers.
742 disabled_mask = ssl_cipher_get_disabled();
745 * Now we have to collect the available ciphers from the compiled
746 * in ciphers. We cannot get more than the number compiled in, so
747 * it is used for allocation.
749 num_of_ciphers = ssl_method->num_ciphers();
751 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
752 #endif /* KSSL_DEBUG */
753 list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
756 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
757 return(NULL); /* Failure */
760 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
764 * We also need cipher aliases for selecting based on the rule_str.
765 * There might be two types of entries in the rule_str: 1) names
766 * of ciphers themselves 2) aliases for groups of ciphers.
767 * For 1) we need the available ciphers and for 2) the cipher
768 * groups of cipher_aliases added together in one list (otherwise
769 * we would be happy with just the cipher_aliases table).
771 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
772 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
774 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
778 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
779 return(NULL); /* Failure */
781 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
785 * If the rule_string begins with DEFAULT, apply the default rule
786 * before using the (possibly available) additional rules.
790 if (strncmp(rule_str,"DEFAULT",7) == 0)
792 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
793 list, &head, &tail, ca_list);
799 if (ok && (strlen(rule_p) > 0))
800 ok = ssl_cipher_process_rulestr(rule_p, list, &head, &tail,
803 OPENSSL_free(ca_list); /* Not needed anymore */
806 { /* Rule processing failure */
811 * Allocate new "cipherstack" for the result, return with error
812 * if we cannot get one.
814 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
821 * The cipher selection for the list is done. The ciphers are added
822 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
824 for (curr = head; curr != NULL; curr = curr->next)
828 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
830 printf("<%s>\n",curr->cipher->name);
834 OPENSSL_free(list); /* Not needed any longer */
837 * The following passage is a little bit odd. If pointer variables
838 * were supplied to hold STACK_OF(SSL_CIPHER) return information,
839 * the old memory pointed to is free()ed. Then, however, the
840 * cipher_list entry will be assigned just a copy of the returned
841 * cipher stack. For cipher_list_by_id a copy of the cipher stack
842 * will be created. See next comment...
844 if (cipher_list != NULL)
846 if (*cipher_list != NULL)
847 sk_SSL_CIPHER_free(*cipher_list);
848 *cipher_list = cipherstack;
851 if (cipher_list_by_id != NULL)
853 if (*cipher_list_by_id != NULL)
854 sk_SSL_CIPHER_free(*cipher_list_by_id);
855 *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
859 * Now it is getting really strange. If something failed during
860 * the previous pointer assignment or if one of the pointers was
861 * not requested, the error condition is met. That might be
862 * discussable. The strange thing is however that in this case
863 * the memory "ret" pointed to is "free()ed" and hence the pointer
864 * cipher_list becomes wild. The memory reserved for
865 * cipher_list_by_id however is not "free()ed" and stays intact.
867 if ( (cipher_list_by_id == NULL) ||
868 (*cipher_list_by_id == NULL) ||
869 (cipher_list == NULL) ||
870 (*cipher_list == NULL))
872 sk_SSL_CIPHER_free(cipherstack);
876 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
881 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
883 int is_export,pkl,kl;
885 char *kx,*au,*enc,*mac;
886 unsigned long alg,alg2,alg_s;
888 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
890 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
891 #endif /* KSSL_DEBUG */
893 alg=cipher->algorithms;
894 alg_s=cipher->algo_strength;
895 alg2=cipher->algorithm2;
897 is_export=SSL_C_IS_EXPORT(cipher);
898 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
899 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
900 exp=is_export?" export":"";
904 else if (alg & SSL_SSLV3)
909 switch (alg&SSL_MKEY_MASK)
912 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
920 case SSL_kKRB5: /* VRS */
921 case SSL_KRB5: /* VRS */
928 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
934 switch (alg&SSL_AUTH_MASK)
945 case SSL_aKRB5: /* VRS */
946 case SSL_KRB5: /* VRS */
958 switch (alg&SSL_ENC_MASK)
961 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
967 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
968 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
971 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
987 switch (alg&SSL_MAC_MASK)
1003 buf=OPENSSL_malloc(len);
1004 if (buf == NULL) return("OPENSSL_malloc Error");
1007 return("Buffer too small");
1010 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp,alg);
1012 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp);
1013 #endif /* KSSL_DEBUG */
1017 char *SSL_CIPHER_get_version(SSL_CIPHER *c)
1021 if (c == NULL) return("(NONE)");
1022 i=(int)(c->id>>24L);
1024 return("TLSv1/SSLv3");
1031 /* return the actual cipher being used */
1032 const char *SSL_CIPHER_get_name(SSL_CIPHER *c)
1039 /* number of bits for symmetric cipher */
1040 int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
1046 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1047 ret = c->strength_bits;
1052 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1057 if ((n == 0) || (sk == NULL)) return(NULL);
1058 nn=sk_SSL_COMP_num(sk);
1059 for (i=0; i<nn; i++)
1061 ctmp=sk_SSL_COMP_value(sk,i);
1068 static int sk_comp_cmp(const SSL_COMP * const *a,
1069 const SSL_COMP * const *b)
1071 return((*a)->id-(*b)->id);
1074 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1076 return(ssl_comp_methods);
1079 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1082 STACK_OF(SSL_COMP) *sk;
1084 if (cm == NULL || cm->type == NID_undef)
1088 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1091 if (ssl_comp_methods == NULL)
1092 sk=ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
1094 sk=ssl_comp_methods;
1095 if ((sk == NULL) || !sk_SSL_COMP_push(sk,comp))
1098 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);