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 = 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);
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 *)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 **)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 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 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 if (buf == NULL) return("Malloc Error");
982 return("Buffer too small");
984 sprintf(buf,format,cipher->name,ver,kx,au,enc,mac,exp);
988 char *SSL_CIPHER_get_version(SSL_CIPHER *c)
992 if (c == NULL) return("(NONE)");
995 return("TLSv1/SSLv3");
1002 /* return the actual cipher being used */
1003 const char *SSL_CIPHER_get_name(SSL_CIPHER *c)
1010 /* number of bits for symmetric cipher */
1011 int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
1017 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1018 ret = c->strength_bits;
1023 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1028 if ((n == 0) || (sk == NULL)) return(NULL);
1029 nn=sk_SSL_COMP_num(sk);
1030 for (i=0; i<nn; i++)
1032 ctmp=sk_SSL_COMP_value(sk,i);
1039 static int sk_comp_cmp(SSL_COMP **a,SSL_COMP **b)
1041 return((*a)->id-(*b)->id);
1044 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1046 return(ssl_comp_methods);
1049 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1052 STACK_OF(SSL_COMP) *sk;
1054 comp=(SSL_COMP *)Malloc(sizeof(SSL_COMP));
1057 if (ssl_comp_methods == NULL)
1058 sk=ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
1060 sk=ssl_comp_methods;
1061 if ((sk == NULL) || !sk_SSL_COMP_push(sk,comp))
1063 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);