2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * ECC cipher suite support in OpenSSL originally developed by
61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
64 #include <openssl/objects.h>
65 #include <openssl/comp.h>
68 #define SSL_ENC_DES_IDX 0
69 #define SSL_ENC_3DES_IDX 1
70 #define SSL_ENC_RC4_IDX 2
71 #define SSL_ENC_RC2_IDX 3
72 #define SSL_ENC_IDEA_IDX 4
73 #define SSL_ENC_eFZA_IDX 5
74 #define SSL_ENC_NULL_IDX 6
75 #define SSL_ENC_AES128_IDX 7
76 #define SSL_ENC_AES256_IDX 8
77 #define SSL_ENC_NUM_IDX 9
79 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
80 NULL,NULL,NULL,NULL,NULL,NULL,
83 #define SSL_COMP_NULL_IDX 0
84 #define SSL_COMP_ZLIB_IDX 1
85 #define SSL_COMP_NUM_IDX 2
87 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
89 #define SSL_MD_MD5_IDX 0
90 #define SSL_MD_SHA1_IDX 1
91 #define SSL_MD_NUM_IDX 2
92 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
100 #define CIPHER_SPECIAL 5
102 typedef struct cipher_order_st
107 struct cipher_order_st *next,*prev;
110 static const SSL_CIPHER cipher_aliases[]={
111 /* Don't include eNULL unless specifically enabled. */
112 /* Don't include ECC in ALL because these ciphers are not yet official. */
113 {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL & ~SSL_kECDH & ~SSL_kECDHE, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, /* must be first */
114 /* TODO: COMPLEMENT OF ALL and COMPLEMENT OF DEFAULT do not have ECC cipher suites handled properly. */
115 {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, /* COMPLEMENT OF ALL */
116 {0,SSL_TXT_CMPDEF,0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK,0},
117 {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */
118 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0},
119 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0},
120 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0},
121 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0},
122 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0},
123 {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0},
124 {0,SSL_TXT_ECC, 0,(SSL_kECDH|SSL_kECDHE), 0,0,0,0,SSL_MKEY_MASK,0},
125 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0},
126 {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */
127 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0},
128 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0},
129 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0},
130 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0},
131 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0},
132 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0},
134 {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0},
135 {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0},
136 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0},
137 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0},
138 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
139 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
140 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
141 {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0},
143 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
144 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
145 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
147 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
148 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
149 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
150 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
151 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
153 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
154 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
155 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
157 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
158 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
159 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
160 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
161 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
162 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
163 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
166 static int init_ciphers=1;
168 static void load_ciphers(void)
171 ssl_cipher_methods[SSL_ENC_DES_IDX]=
172 EVP_get_cipherbyname(SN_des_cbc);
173 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
174 EVP_get_cipherbyname(SN_des_ede3_cbc);
175 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
176 EVP_get_cipherbyname(SN_rc4);
177 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
178 EVP_get_cipherbyname(SN_rc2_cbc);
179 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
180 EVP_get_cipherbyname(SN_idea_cbc);
181 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
182 EVP_get_cipherbyname(SN_aes_128_cbc);
183 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
184 EVP_get_cipherbyname(SN_aes_256_cbc);
186 ssl_digest_methods[SSL_MD_MD5_IDX]=
187 EVP_get_digestbyname(SN_md5);
188 ssl_digest_methods[SSL_MD_SHA1_IDX]=
189 EVP_get_digestbyname(SN_sha1);
192 static int sk_comp_cmp(const SSL_COMP * const *a,
193 const SSL_COMP * const *b)
195 return((*a)->id-(*b)->id);
198 static void load_builtin_compressions(void)
200 if (ssl_comp_methods == NULL)
202 SSL_COMP *comp = NULL;
205 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
206 if (ssl_comp_methods != NULL)
208 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
211 comp->method=COMP_zlib();
213 && comp->method->type == NID_undef)
217 comp->id=SSL_COMP_ZLIB_IDX;
218 comp->name=comp->method->name;
219 sk_SSL_COMP_push(ssl_comp_methods,comp);
227 int ssl_cipher_get_evp(SSL_SESSION *s, const EVP_CIPHER **enc,
228 const EVP_MD **md, SSL_COMP **comp)
234 if (c == NULL) return(0);
239 load_builtin_compressions();
242 ctmp.id=s->compress_meth;
243 if (ssl_comp_methods != NULL)
245 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
247 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
253 if ((enc == NULL) || (md == NULL)) return(0);
255 switch (c->algorithms & SSL_ENC_MASK)
278 case 128: i=SSL_ENC_AES128_IDX; break;
279 case 256: i=SSL_ENC_AES256_IDX; break;
280 default: i=-1; break;
288 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
292 if (i == SSL_ENC_NULL_IDX)
295 *enc=ssl_cipher_methods[i];
298 switch (c->algorithms & SSL_MAC_MASK)
310 if ((i < 0) || (i > SSL_MD_NUM_IDX))
313 *md=ssl_digest_methods[i];
315 if ((*enc != NULL) && (*md != NULL))
321 #define ITEM_SEP(a) \
322 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
324 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
327 if (curr == *tail) return;
330 if (curr->prev != NULL)
331 curr->prev->next=curr->next;
332 if (curr->next != NULL) /* should always be true */
333 curr->next->prev=curr->prev;
340 static unsigned long ssl_cipher_get_disabled(void)
345 #ifdef OPENSSL_NO_RSA
346 mask |= SSL_aRSA|SSL_kRSA;
348 #ifdef OPENSSL_NO_DSA
352 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
354 #ifdef OPENSSL_NO_KRB5
355 mask |= SSL_kKRB5|SSL_aKRB5;
357 #ifdef OPENSSL_NO_ECDH
358 mask |= SSL_kECDH|SSL_kECDHE;
360 #ifdef SSL_FORBID_ENULL
364 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
365 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
366 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
367 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
368 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
369 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
370 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
372 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
373 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
378 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
379 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *list,
380 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
386 * We have num_of_ciphers descriptions compiled in, depending on the
387 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
388 * These will later be sorted in a linked list with at most num
392 /* Get the initial list of ciphers */
393 list_num = 0; /* actual count of ciphers */
394 for (i = 0; i < num_of_ciphers; i++)
396 c = ssl_method->get_cipher(i);
397 /* drop those that use any of that is not available */
398 if ((c != NULL) && c->valid && !(c->algorithms & mask))
400 list[list_num].cipher = c;
401 list[list_num].next = NULL;
402 list[list_num].prev = NULL;
403 list[list_num].active = 0;
406 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
407 #endif /* KSSL_DEBUG */
409 if (!sk_push(ca_list,(char *)c)) goto err;
415 * Prepare linked list from list entries
417 for (i = 1; i < list_num - 1; i++)
419 list[i].prev = &(list[i-1]);
420 list[i].next = &(list[i+1]);
424 (*head_p) = &(list[0]);
425 (*head_p)->prev = NULL;
426 (*head_p)->next = &(list[1]);
427 (*tail_p) = &(list[list_num - 1]);
428 (*tail_p)->prev = &(list[list_num - 2]);
429 (*tail_p)->next = NULL;
433 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
434 int num_of_group_aliases, unsigned long mask,
437 CIPHER_ORDER *ciph_curr;
438 SSL_CIPHER **ca_curr;
442 * First, add the real ciphers as already collected
446 while (ciph_curr != NULL)
448 *ca_curr = ciph_curr->cipher;
450 ciph_curr = ciph_curr->next;
454 * Now we add the available ones from the cipher_aliases[] table.
455 * They represent either an algorithm, that must be fully
456 * supported (not match any bit in mask) or represent a cipher
457 * strength value (will be added in any case because algorithms=0).
459 for (i = 0; i < num_of_group_aliases; i++)
461 if ((i == 0) || /* always fetch "ALL" */
462 !(cipher_aliases[i].algorithms & mask))
464 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
469 *ca_curr = NULL; /* end of list */
472 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
473 unsigned long algo_strength, unsigned long mask_strength,
474 int rule, int strength_bits, CIPHER_ORDER *list,
475 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
477 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
479 unsigned long ma, ma_s;
482 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
483 rule, algorithms, mask, algo_strength, mask_strength,
487 curr = head = *head_p;
489 tail2 = tail = *tail_p;
492 if ((curr == NULL) || (curr == tail2)) break;
499 * Selection criteria is either the number of strength_bits
500 * or the algorithm used.
502 if (strength_bits == -1)
504 ma = mask & cp->algorithms;
505 ma_s = mask_strength & cp->algo_strength;
508 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
509 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
512 * Select: if none of the mask bit was met from the
513 * cipher or not all of the bits were met, the
514 * selection does not apply.
516 if (((ma == 0) && (ma_s == 0)) ||
517 ((ma & algorithms) != ma) ||
518 ((ma_s & algo_strength) != ma_s))
519 continue; /* does not apply */
521 else if (strength_bits != cp->strength_bits)
522 continue; /* does not apply */
525 printf("Action = %d\n", rule);
528 /* add the cipher if it has not been added yet. */
529 if (rule == CIPHER_ADD)
533 ll_append_tail(&head, curr, &tail);
537 /* Move the added cipher to this location */
538 else if (rule == CIPHER_ORD)
542 ll_append_tail(&head, curr, &tail);
545 else if (rule == CIPHER_DEL)
547 else if (rule == CIPHER_KILL)
552 curr->prev->next = curr->next;
556 if (curr->next != NULL)
557 curr->next->prev = curr->prev;
558 if (curr->prev != NULL)
559 curr->prev->next = curr->next;
569 static int ssl_cipher_strength_sort(CIPHER_ORDER *list, CIPHER_ORDER **head_p,
570 CIPHER_ORDER **tail_p)
572 int max_strength_bits, i, *number_uses;
576 * This routine sorts the ciphers with descending strength. The sorting
577 * must keep the pre-sorted sequence, so we apply the normal sorting
578 * routine as '+' movement to the end of the list.
580 max_strength_bits = 0;
585 (curr->cipher->strength_bits > max_strength_bits))
586 max_strength_bits = curr->cipher->strength_bits;
590 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
593 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
596 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
599 * Now find the strength_bits values actually used
605 number_uses[curr->cipher->strength_bits]++;
609 * Go through the list of used strength_bits values in descending
612 for (i = max_strength_bits; i >= 0; i--)
613 if (number_uses[i] > 0)
614 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
615 list, head_p, tail_p);
617 OPENSSL_free(number_uses);
621 static int ssl_cipher_process_rulestr(const char *rule_str,
622 CIPHER_ORDER *list, CIPHER_ORDER **head_p,
623 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
625 unsigned long algorithms, mask, algo_strength, mask_strength;
626 const char *l, *start, *buf;
627 int j, multi, found, rule, retval, ok, buflen;
639 { rule = CIPHER_DEL; l++; }
641 { rule = CIPHER_ORD; l++; }
643 { rule = CIPHER_KILL; l++; }
645 { rule = CIPHER_SPECIAL; l++; }
647 { rule = CIPHER_ADD; }
655 algorithms = mask = algo_strength = mask_strength = 0;
663 #ifndef CHARSET_EBCDIC
664 while ( ((ch >= 'A') && (ch <= 'Z')) ||
665 ((ch >= '0') && (ch <= '9')) ||
666 ((ch >= 'a') && (ch <= 'z')) ||
669 while ( isalnum(ch) || (ch == '-'))
679 * We hit something we cannot deal with,
680 * it is no command or separator nor
681 * alphanumeric, so we call this an error.
683 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
684 SSL_R_INVALID_COMMAND);
690 if (rule == CIPHER_SPECIAL)
692 found = 0; /* unused -- avoid compiler warning */
693 break; /* special treatment */
696 /* check for multi-part specification */
706 * Now search for the cipher alias in the ca_list. Be careful
707 * with the strncmp, because the "buflen" limitation
708 * will make the rule "ADH:SOME" and the cipher
709 * "ADH-MY-CIPHER" look like a match for buflen=3.
710 * So additionally check whether the cipher name found
711 * has the correct length. We can save a strlen() call:
712 * just checking for the '\0' at the right place is
713 * sufficient, we have to strncmp() anyway.
718 if ((ca_list[j]->name[buflen] == '\0') &&
719 !strncmp(buf, ca_list[j]->name, buflen))
728 break; /* ignore this entry */
730 algorithms |= ca_list[j]->algorithms;
731 mask |= ca_list[j]->mask;
732 algo_strength |= ca_list[j]->algo_strength;
733 mask_strength |= ca_list[j]->mask_strength;
739 * Ok, we have the rule, now apply it
741 if (rule == CIPHER_SPECIAL)
742 { /* special command */
745 !strncmp(buf, "STRENGTH", 8))
746 ok = ssl_cipher_strength_sort(list,
749 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
750 SSL_R_INVALID_COMMAND);
754 * We do not support any "multi" options
755 * together with "@", so throw away the
756 * rest of the command, if any left, until
757 * end or ':' is found.
759 while ((*l != '\0') && ITEM_SEP(*l))
764 ssl_cipher_apply_rule(algorithms, mask,
765 algo_strength, mask_strength, rule, -1,
766 list, head_p, tail_p);
770 while ((*l != '\0') && ITEM_SEP(*l))
773 if (*l == '\0') break; /* done */
779 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
780 STACK_OF(SSL_CIPHER) **cipher_list,
781 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
782 const char *rule_str)
784 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
785 unsigned long disabled_mask;
786 STACK_OF(SSL_CIPHER) *cipherstack;
788 CIPHER_ORDER *list = NULL, *head = NULL, *tail = NULL, *curr;
789 SSL_CIPHER **ca_list = NULL;
792 * Return with error if nothing to do.
794 if (rule_str == NULL) return(NULL);
796 if (init_ciphers) load_ciphers();
799 * To reduce the work to do we only want to process the compiled
800 * in algorithms, so we first get the mask of disabled ciphers.
802 disabled_mask = ssl_cipher_get_disabled();
805 * Now we have to collect the available ciphers from the compiled
806 * in ciphers. We cannot get more than the number compiled in, so
807 * it is used for allocation.
809 num_of_ciphers = ssl_method->num_ciphers();
811 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
812 #endif /* KSSL_DEBUG */
813 list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
816 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
817 return(NULL); /* Failure */
820 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
824 * We also need cipher aliases for selecting based on the rule_str.
825 * There might be two types of entries in the rule_str: 1) names
826 * of ciphers themselves 2) aliases for groups of ciphers.
827 * For 1) we need the available ciphers and for 2) the cipher
828 * groups of cipher_aliases added together in one list (otherwise
829 * we would be happy with just the cipher_aliases table).
831 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
832 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
834 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
838 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
839 return(NULL); /* Failure */
841 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
845 * If the rule_string begins with DEFAULT, apply the default rule
846 * before using the (possibly available) additional rules.
850 if (strncmp(rule_str,"DEFAULT",7) == 0)
852 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
853 list, &head, &tail, ca_list);
859 if (ok && (strlen(rule_p) > 0))
860 ok = ssl_cipher_process_rulestr(rule_p, list, &head, &tail,
863 OPENSSL_free(ca_list); /* Not needed anymore */
866 { /* Rule processing failure */
871 * Allocate new "cipherstack" for the result, return with error
872 * if we cannot get one.
874 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
881 * The cipher selection for the list is done. The ciphers are added
882 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
884 for (curr = head; curr != NULL; curr = curr->next)
888 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
890 printf("<%s>\n",curr->cipher->name);
894 OPENSSL_free(list); /* Not needed any longer */
897 * The following passage is a little bit odd. If pointer variables
898 * were supplied to hold STACK_OF(SSL_CIPHER) return information,
899 * the old memory pointed to is free()ed. Then, however, the
900 * cipher_list entry will be assigned just a copy of the returned
901 * cipher stack. For cipher_list_by_id a copy of the cipher stack
902 * will be created. See next comment...
904 if (cipher_list != NULL)
906 if (*cipher_list != NULL)
907 sk_SSL_CIPHER_free(*cipher_list);
908 *cipher_list = cipherstack;
911 if (cipher_list_by_id != NULL)
913 if (*cipher_list_by_id != NULL)
914 sk_SSL_CIPHER_free(*cipher_list_by_id);
915 *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
919 * Now it is getting really strange. If something failed during
920 * the previous pointer assignment or if one of the pointers was
921 * not requested, the error condition is met. That might be
922 * discussable. The strange thing is however that in this case
923 * the memory "ret" pointed to is "free()ed" and hence the pointer
924 * cipher_list becomes wild. The memory reserved for
925 * cipher_list_by_id however is not "free()ed" and stays intact.
927 if ( (cipher_list_by_id == NULL) ||
928 (*cipher_list_by_id == NULL) ||
929 (cipher_list == NULL) ||
930 (*cipher_list == NULL))
932 sk_SSL_CIPHER_free(cipherstack);
936 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
941 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
943 int is_export,pkl,kl;
945 char *kx,*au,*enc,*mac;
946 unsigned long alg,alg2,alg_s;
948 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
950 static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
951 #endif /* KSSL_DEBUG */
953 alg=cipher->algorithms;
954 alg_s=cipher->algo_strength;
955 alg2=cipher->algorithm2;
957 is_export=SSL_C_IS_EXPORT(cipher);
958 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
959 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
960 exp=is_export?" export":"";
964 else if (alg & SSL_SSLV3)
969 switch (alg&SSL_MKEY_MASK)
972 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
980 case SSL_kKRB5: /* VRS */
981 case SSL_KRB5: /* VRS */
988 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
992 kx=is_export?"ECDH(<=163)":"ECDH";
998 switch (alg&SSL_AUTH_MASK)
1009 case SSL_aKRB5: /* VRS */
1010 case SSL_KRB5: /* VRS */
1025 switch (alg&SSL_ENC_MASK)
1028 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1034 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1035 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1038 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1050 switch(cipher->strength_bits)
1052 case 128: enc="AES(128)"; break;
1053 case 192: enc="AES(192)"; break;
1054 case 256: enc="AES(256)"; break;
1055 default: enc="AES(?""?""?)"; break;
1063 switch (alg&SSL_MAC_MASK)
1079 buf=OPENSSL_malloc(len);
1080 if (buf == NULL) return("OPENSSL_malloc Error");
1083 return("Buffer too small");
1086 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp,alg);
1088 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp);
1089 #endif /* KSSL_DEBUG */
1093 char *SSL_CIPHER_get_version(SSL_CIPHER *c)
1097 if (c == NULL) return("(NONE)");
1098 i=(int)(c->id>>24L);
1100 return("TLSv1/SSLv3");
1107 /* return the actual cipher being used */
1108 const char *SSL_CIPHER_get_name(SSL_CIPHER *c)
1115 /* number of bits for symmetric cipher */
1116 int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
1122 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1123 ret = c->strength_bits;
1128 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1133 if ((n == 0) || (sk == NULL)) return(NULL);
1134 nn=sk_SSL_COMP_num(sk);
1135 for (i=0; i<nn; i++)
1137 ctmp=sk_SSL_COMP_value(sk,i);
1144 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1146 load_builtin_compressions();
1147 return(ssl_comp_methods);
1150 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1154 if (cm == NULL || cm->type == NID_undef)
1157 /* According to draft-ietf-tls-compression-04.txt, the
1158 compression number ranges should be the following:
1160 0 to 63: methods defined by the IETF
1161 64 to 192: external party methods assigned by IANA
1162 193 to 255: reserved for private use */
1163 if (id < 193 || id > 255)
1165 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1170 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1173 load_builtin_compressions();
1174 if ((ssl_comp_methods == NULL)
1175 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1179 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);