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_AES128_IDX 7
72 #define SSL_ENC_AES256_IDX 8
73 #define SSL_ENC_NUM_IDX 9
75 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
76 NULL,NULL,NULL,NULL,NULL,NULL,
79 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
81 #define SSL_MD_MD5_IDX 0
82 #define SSL_MD_SHA1_IDX 1
83 #define SSL_MD_NUM_IDX 2
84 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
92 #define CIPHER_SPECIAL 5
94 typedef struct cipher_order_st
99 struct cipher_order_st *next,*prev;
102 static const SSL_CIPHER cipher_aliases[]={
103 /* Don't include eNULL unless specifically enabled. */
104 {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, /* must be first */
105 {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, /* COMPLEMENT OF ALL */
106 {0,SSL_TXT_CMPDEF,0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK,0},
107 {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */
108 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0},
109 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0},
110 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0},
111 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0},
112 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0},
113 {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0},
114 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0},
116 {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */
117 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0},
118 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0},
119 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0},
120 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0},
121 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0},
122 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0},
124 {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0},
125 {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0},
126 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0},
127 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0},
128 #ifndef OPENSSL_NO_IDEA
129 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
131 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
132 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
133 {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0},
135 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
136 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
137 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
139 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
140 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
141 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
142 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
143 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
145 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
146 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
147 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
149 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
150 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
151 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
152 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
153 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
154 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
155 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
158 static int init_ciphers=1;
160 static void load_ciphers(void)
163 ssl_cipher_methods[SSL_ENC_DES_IDX]=
164 EVP_get_cipherbyname(SN_des_cbc);
165 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
166 EVP_get_cipherbyname(SN_des_ede3_cbc);
167 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
168 EVP_get_cipherbyname(SN_rc4);
169 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
170 EVP_get_cipherbyname(SN_rc2_cbc);
171 #ifndef OPENSSL_NO_IDEA
172 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
173 EVP_get_cipherbyname(SN_idea_cbc);
175 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
177 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
178 EVP_get_cipherbyname(SN_aes_128_cbc);
179 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
180 EVP_get_cipherbyname(SN_aes_256_cbc);
182 ssl_digest_methods[SSL_MD_MD5_IDX]=
183 EVP_get_digestbyname(SN_md5);
184 ssl_digest_methods[SSL_MD_SHA1_IDX]=
185 EVP_get_digestbyname(SN_sha1);
188 int ssl_cipher_get_evp(SSL_SESSION *s, const EVP_CIPHER **enc,
189 const EVP_MD **md, SSL_COMP **comp)
195 if (c == NULL) return(0);
200 if (s->compress_meth == 0)
202 else if (ssl_comp_methods == NULL)
210 ctmp.id=s->compress_meth;
211 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
213 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
219 if ((enc == NULL) || (md == NULL)) return(0);
221 switch (c->algorithms & SSL_ENC_MASK)
244 case 128: i=SSL_ENC_AES128_IDX; break;
245 case 256: i=SSL_ENC_AES256_IDX; break;
246 default: i=-1; break;
254 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
258 if (i == SSL_ENC_NULL_IDX)
261 *enc=ssl_cipher_methods[i];
264 switch (c->algorithms & SSL_MAC_MASK)
276 if ((i < 0) || (i > SSL_MD_NUM_IDX))
279 *md=ssl_digest_methods[i];
281 if ((*enc != NULL) && (*md != NULL))
287 #define ITEM_SEP(a) \
288 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
290 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
293 if (curr == *tail) return;
296 if (curr->prev != NULL)
297 curr->prev->next=curr->next;
298 if (curr->next != NULL) /* should always be true */
299 curr->next->prev=curr->prev;
306 static unsigned long ssl_cipher_get_disabled(void)
311 #ifdef OPENSSL_NO_RSA
312 mask |= SSL_aRSA|SSL_kRSA;
314 #ifdef OPENSSL_NO_DSA
318 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
320 #ifdef OPENSSL_NO_KRB5
321 mask |= SSL_kKRB5|SSL_aKRB5;
324 #ifdef SSL_FORBID_ENULL
328 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
329 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
330 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
331 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
332 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
333 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
334 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
336 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
337 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
342 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
343 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
344 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
350 * We have num_of_ciphers descriptions compiled in, depending on the
351 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
352 * These will later be sorted in a linked list with at most num
356 /* Get the initial list of ciphers */
357 co_list_num = 0; /* actual count of ciphers */
358 for (i = 0; i < num_of_ciphers; i++)
360 c = ssl_method->get_cipher(i);
361 /* drop those that use any of that is not available */
362 if ((c != NULL) && c->valid && !(c->algorithms & mask))
364 co_list[co_list_num].cipher = c;
365 co_list[co_list_num].next = NULL;
366 co_list[co_list_num].prev = NULL;
367 co_list[co_list_num].active = 0;
370 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
371 #endif /* KSSL_DEBUG */
373 if (!sk_push(ca_list,(char *)c)) goto err;
379 * Prepare linked list from list entries
381 for (i = 1; i < co_list_num - 1; i++)
383 co_list[i].prev = &(co_list[i-1]);
384 co_list[i].next = &(co_list[i+1]);
388 (*head_p) = &(co_list[0]);
389 (*head_p)->prev = NULL;
390 (*head_p)->next = &(co_list[1]);
391 (*tail_p) = &(co_list[co_list_num - 1]);
392 (*tail_p)->prev = &(co_list[co_list_num - 2]);
393 (*tail_p)->next = NULL;
397 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
398 int num_of_group_aliases, unsigned long mask,
401 CIPHER_ORDER *ciph_curr;
402 SSL_CIPHER **ca_curr;
406 * First, add the real ciphers as already collected
410 while (ciph_curr != NULL)
412 *ca_curr = ciph_curr->cipher;
414 ciph_curr = ciph_curr->next;
418 * Now we add the available ones from the cipher_aliases[] table.
419 * They represent either an algorithm, that must be fully
420 * supported (not match any bit in mask) or represent a cipher
421 * strength value (will be added in any case because algorithms=0).
423 for (i = 0; i < num_of_group_aliases; i++)
425 if ((i == 0) || /* always fetch "ALL" */
426 !(cipher_aliases[i].algorithms & mask))
428 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
433 *ca_curr = NULL; /* end of list */
436 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
437 unsigned long algo_strength, unsigned long mask_strength,
438 int rule, int strength_bits, CIPHER_ORDER *co_list,
439 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
441 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
443 unsigned long ma, ma_s;
446 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
447 rule, algorithms, mask, algo_strength, mask_strength,
451 curr = head = *head_p;
453 tail2 = tail = *tail_p;
456 if ((curr == NULL) || (curr == tail2)) break;
463 * Selection criteria is either the number of strength_bits
464 * or the algorithm used.
466 if (strength_bits == -1)
468 ma = mask & cp->algorithms;
469 ma_s = mask_strength & cp->algo_strength;
472 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
473 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
476 * Select: if none of the mask bit was met from the
477 * cipher or not all of the bits were met, the
478 * selection does not apply.
480 if (((ma == 0) && (ma_s == 0)) ||
481 ((ma & algorithms) != ma) ||
482 ((ma_s & algo_strength) != ma_s))
483 continue; /* does not apply */
485 else if (strength_bits != cp->strength_bits)
486 continue; /* does not apply */
489 printf("Action = %d\n", rule);
492 /* add the cipher if it has not been added yet. */
493 if (rule == CIPHER_ADD)
497 ll_append_tail(&head, curr, &tail);
501 /* Move the added cipher to this location */
502 else if (rule == CIPHER_ORD)
506 ll_append_tail(&head, curr, &tail);
509 else if (rule == CIPHER_DEL)
511 else if (rule == CIPHER_KILL)
516 curr->prev->next = curr->next;
520 if (curr->next != NULL)
521 curr->next->prev = curr->prev;
522 if (curr->prev != NULL)
523 curr->prev->next = curr->next;
533 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
534 CIPHER_ORDER **head_p,
535 CIPHER_ORDER **tail_p)
537 int max_strength_bits, i, *number_uses;
541 * This routine sorts the ciphers with descending strength. The sorting
542 * must keep the pre-sorted sequence, so we apply the normal sorting
543 * routine as '+' movement to the end of the list.
545 max_strength_bits = 0;
550 (curr->cipher->strength_bits > max_strength_bits))
551 max_strength_bits = curr->cipher->strength_bits;
555 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
558 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
561 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
564 * Now find the strength_bits values actually used
570 number_uses[curr->cipher->strength_bits]++;
574 * Go through the list of used strength_bits values in descending
577 for (i = max_strength_bits; i >= 0; i--)
578 if (number_uses[i] > 0)
579 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
580 co_list, head_p, tail_p);
582 OPENSSL_free(number_uses);
586 static int ssl_cipher_process_rulestr(const char *rule_str,
587 CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
588 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
590 unsigned long algorithms, mask, algo_strength, mask_strength;
591 const char *l, *start, *buf;
592 int j, multi, found, rule, retval, ok, buflen;
604 { rule = CIPHER_DEL; l++; }
606 { rule = CIPHER_ORD; l++; }
608 { rule = CIPHER_KILL; l++; }
610 { rule = CIPHER_SPECIAL; l++; }
612 { rule = CIPHER_ADD; }
620 algorithms = mask = algo_strength = mask_strength = 0;
628 #ifndef CHARSET_EBCDIC
629 while ( ((ch >= 'A') && (ch <= 'Z')) ||
630 ((ch >= '0') && (ch <= '9')) ||
631 ((ch >= 'a') && (ch <= 'z')) ||
634 while ( isalnum(ch) || (ch == '-'))
644 * We hit something we cannot deal with,
645 * it is no command or separator nor
646 * alphanumeric, so we call this an error.
648 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
649 SSL_R_INVALID_COMMAND);
655 if (rule == CIPHER_SPECIAL)
657 found = 0; /* unused -- avoid compiler warning */
658 break; /* special treatment */
661 /* check for multi-part specification */
671 * Now search for the cipher alias in the ca_list. Be careful
672 * with the strncmp, because the "buflen" limitation
673 * will make the rule "ADH:SOME" and the cipher
674 * "ADH-MY-CIPHER" look like a match for buflen=3.
675 * So additionally check whether the cipher name found
676 * has the correct length. We can save a strlen() call:
677 * just checking for the '\0' at the right place is
678 * sufficient, we have to strncmp() anyway. (We cannot
679 * use strcmp(), because buf is not '\0' terminated.)
684 if (!strncmp(buf, ca_list[j]->name, buflen) &&
685 (ca_list[j]->name[buflen] == '\0'))
694 break; /* ignore this entry */
696 algorithms |= ca_list[j]->algorithms;
697 mask |= ca_list[j]->mask;
698 algo_strength |= ca_list[j]->algo_strength;
699 mask_strength |= ca_list[j]->mask_strength;
705 * Ok, we have the rule, now apply it
707 if (rule == CIPHER_SPECIAL)
708 { /* special command */
711 !strncmp(buf, "STRENGTH", 8))
712 ok = ssl_cipher_strength_sort(co_list,
715 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
716 SSL_R_INVALID_COMMAND);
720 * We do not support any "multi" options
721 * together with "@", so throw away the
722 * rest of the command, if any left, until
723 * end or ':' is found.
725 while ((*l != '\0') && ITEM_SEP(*l))
730 ssl_cipher_apply_rule(algorithms, mask,
731 algo_strength, mask_strength, rule, -1,
732 co_list, head_p, tail_p);
736 while ((*l != '\0') && ITEM_SEP(*l))
739 if (*l == '\0') break; /* done */
745 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
746 STACK_OF(SSL_CIPHER) **cipher_list,
747 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
748 const char *rule_str)
750 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
751 unsigned long disabled_mask;
752 STACK_OF(SSL_CIPHER) *cipherstack;
754 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
755 SSL_CIPHER **ca_list = NULL;
758 * Return with error if nothing to do.
760 if (rule_str == NULL) return(NULL);
764 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
765 if (init_ciphers) load_ciphers();
766 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
770 * To reduce the work to do we only want to process the compiled
771 * in algorithms, so we first get the mask of disabled ciphers.
773 disabled_mask = ssl_cipher_get_disabled();
776 * Now we have to collect the available ciphers from the compiled
777 * in ciphers. We cannot get more than the number compiled in, so
778 * it is used for allocation.
780 num_of_ciphers = ssl_method->num_ciphers();
782 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
783 #endif /* KSSL_DEBUG */
784 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
787 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
788 return(NULL); /* Failure */
791 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
792 co_list, &head, &tail);
795 * We also need cipher aliases for selecting based on the rule_str.
796 * There might be two types of entries in the rule_str: 1) names
797 * of ciphers themselves 2) aliases for groups of ciphers.
798 * For 1) we need the available ciphers and for 2) the cipher
799 * groups of cipher_aliases added together in one list (otherwise
800 * we would be happy with just the cipher_aliases table).
802 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
803 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
805 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
808 OPENSSL_free(co_list);
809 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
810 return(NULL); /* Failure */
812 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
816 * If the rule_string begins with DEFAULT, apply the default rule
817 * before using the (possibly available) additional rules.
821 if (strncmp(rule_str,"DEFAULT",7) == 0)
823 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
824 co_list, &head, &tail, ca_list);
830 if (ok && (strlen(rule_p) > 0))
831 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
834 OPENSSL_free(ca_list); /* Not needed anymore */
837 { /* Rule processing failure */
838 OPENSSL_free(co_list);
842 * Allocate new "cipherstack" for the result, return with error
843 * if we cannot get one.
845 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
847 OPENSSL_free(co_list);
852 * The cipher selection for the list is done. The ciphers are added
853 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
855 for (curr = head; curr != NULL; curr = curr->next)
859 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
861 printf("<%s>\n",curr->cipher->name);
865 OPENSSL_free(co_list); /* Not needed any longer */
868 * The following passage is a little bit odd. If pointer variables
869 * were supplied to hold STACK_OF(SSL_CIPHER) return information,
870 * the old memory pointed to is free()ed. Then, however, the
871 * cipher_list entry will be assigned just a copy of the returned
872 * cipher stack. For cipher_list_by_id a copy of the cipher stack
873 * will be created. See next comment...
875 if (cipher_list != NULL)
877 if (*cipher_list != NULL)
878 sk_SSL_CIPHER_free(*cipher_list);
879 *cipher_list = cipherstack;
882 if (cipher_list_by_id != NULL)
884 if (*cipher_list_by_id != NULL)
885 sk_SSL_CIPHER_free(*cipher_list_by_id);
886 *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
890 * Now it is getting really strange. If something failed during
891 * the previous pointer assignment or if one of the pointers was
892 * not requested, the error condition is met. That might be
893 * discussable. The strange thing is however that in this case
894 * the memory "ret" pointed to is "free()ed" and hence the pointer
895 * cipher_list becomes wild. The memory reserved for
896 * cipher_list_by_id however is not "free()ed" and stays intact.
898 if ( (cipher_list_by_id == NULL) ||
899 (*cipher_list_by_id == NULL) ||
900 (cipher_list == NULL) ||
901 (*cipher_list == NULL))
903 sk_SSL_CIPHER_free(cipherstack);
907 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
912 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
914 int is_export,pkl,kl;
916 char *kx,*au,*enc,*mac;
917 unsigned long alg,alg2,alg_s;
919 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
921 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
922 #endif /* KSSL_DEBUG */
924 alg=cipher->algorithms;
925 alg_s=cipher->algo_strength;
926 alg2=cipher->algorithm2;
928 is_export=SSL_C_IS_EXPORT(cipher);
929 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
930 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
931 exp_str=is_export?" export":"";
935 else if (alg & SSL_SSLV3)
940 switch (alg&SSL_MKEY_MASK)
943 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
951 case SSL_kKRB5: /* VRS */
952 case SSL_KRB5: /* VRS */
959 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
965 switch (alg&SSL_AUTH_MASK)
976 case SSL_aKRB5: /* VRS */
977 case SSL_KRB5: /* VRS */
989 switch (alg&SSL_ENC_MASK)
992 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
998 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
999 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1002 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1014 switch(cipher->strength_bits)
1016 case 128: enc="AES(128)"; break;
1017 case 192: enc="AES(192)"; break;
1018 case 256: enc="AES(256)"; break;
1019 default: enc="AES(?""?""?)"; break;
1027 switch (alg&SSL_MAC_MASK)
1043 buf=OPENSSL_malloc(len);
1044 if (buf == NULL) return("OPENSSL_malloc Error");
1047 return("Buffer too small");
1050 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1052 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1053 #endif /* KSSL_DEBUG */
1057 char *SSL_CIPHER_get_version(SSL_CIPHER *c)
1061 if (c == NULL) return("(NONE)");
1062 i=(int)(c->id>>24L);
1064 return("TLSv1/SSLv3");
1071 /* return the actual cipher being used */
1072 const char *SSL_CIPHER_get_name(SSL_CIPHER *c)
1079 /* number of bits for symmetric cipher */
1080 int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
1086 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1087 ret = c->strength_bits;
1092 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1097 if ((n == 0) || (sk == NULL)) return(NULL);
1098 nn=sk_SSL_COMP_num(sk);
1099 for (i=0; i<nn; i++)
1101 ctmp=sk_SSL_COMP_value(sk,i);
1108 static int sk_comp_cmp(const SSL_COMP * const *a,
1109 const SSL_COMP * const *b)
1111 return((*a)->id-(*b)->id);
1114 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1116 return(ssl_comp_methods);
1119 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1122 STACK_OF(SSL_COMP) *sk;
1124 if (cm == NULL || cm->type == NID_undef)
1128 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1131 if (ssl_comp_methods == NULL)
1132 sk=ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
1134 sk=ssl_comp_methods;
1135 if ((sk == NULL) || !sk_SSL_COMP_push(sk,comp))
1138 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);