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 #ifndef OPENSSL_NO_IDEA
139 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
141 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
142 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
143 {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0},
145 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
146 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
147 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
149 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
150 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
151 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
152 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
153 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
155 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
156 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
157 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
159 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
160 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
161 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
162 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
163 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
164 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
165 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
168 static int init_ciphers=1;
170 static void load_ciphers(void)
172 ssl_cipher_methods[SSL_ENC_DES_IDX]=
173 EVP_get_cipherbyname(SN_des_cbc);
174 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
175 EVP_get_cipherbyname(SN_des_ede3_cbc);
176 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
177 EVP_get_cipherbyname(SN_rc4);
178 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
179 EVP_get_cipherbyname(SN_rc2_cbc);
180 #ifndef OPENSSL_NO_IDEA
181 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
182 EVP_get_cipherbyname(SN_idea_cbc);
184 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
186 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
187 EVP_get_cipherbyname(SN_aes_128_cbc);
188 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
189 EVP_get_cipherbyname(SN_aes_256_cbc);
191 ssl_digest_methods[SSL_MD_MD5_IDX]=
192 EVP_get_digestbyname(SN_md5);
193 ssl_digest_methods[SSL_MD_SHA1_IDX]=
194 EVP_get_digestbyname(SN_sha1);
198 static int sk_comp_cmp(const SSL_COMP * const *a,
199 const SSL_COMP * const *b)
201 return((*a)->id-(*b)->id);
204 static void load_builtin_compressions(void)
206 if (ssl_comp_methods != NULL)
209 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
210 if (ssl_comp_methods == NULL)
212 SSL_COMP *comp = NULL;
215 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
216 if (ssl_comp_methods != NULL)
218 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
221 comp->method=COMP_zlib();
223 && comp->method->type == NID_undef)
227 comp->id=SSL_COMP_ZLIB_IDX;
228 comp->name=comp->method->name;
229 sk_SSL_COMP_push(ssl_comp_methods,comp);
235 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
238 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
239 const EVP_MD **md, SSL_COMP **comp)
245 if (c == NULL) return(0);
250 load_builtin_compressions();
253 ctmp.id=s->compress_meth;
254 if (ssl_comp_methods != NULL)
256 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
258 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
264 if ((enc == NULL) || (md == NULL)) return(0);
266 switch (c->algorithms & SSL_ENC_MASK)
289 case 128: i=SSL_ENC_AES128_IDX; break;
290 case 256: i=SSL_ENC_AES256_IDX; break;
291 default: i=-1; break;
299 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
303 if (i == SSL_ENC_NULL_IDX)
306 *enc=ssl_cipher_methods[i];
309 switch (c->algorithms & SSL_MAC_MASK)
321 if ((i < 0) || (i > SSL_MD_NUM_IDX))
324 *md=ssl_digest_methods[i];
326 if ((*enc != NULL) && (*md != NULL))
332 #define ITEM_SEP(a) \
333 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
335 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
338 if (curr == *tail) return;
341 if (curr->prev != NULL)
342 curr->prev->next=curr->next;
343 if (curr->next != NULL) /* should always be true */
344 curr->next->prev=curr->prev;
351 static unsigned long ssl_cipher_get_disabled(void)
356 #ifdef OPENSSL_NO_RSA
357 mask |= SSL_aRSA|SSL_kRSA;
359 #ifdef OPENSSL_NO_DSA
363 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
365 #ifdef OPENSSL_NO_KRB5
366 mask |= SSL_kKRB5|SSL_aKRB5;
368 #ifdef OPENSSL_NO_ECDH
369 mask |= SSL_kECDH|SSL_kECDHE;
371 #ifdef SSL_FORBID_ENULL
375 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
376 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
377 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
378 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
379 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
380 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
381 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
383 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
384 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
389 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
390 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
391 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
397 * We have num_of_ciphers descriptions compiled in, depending on the
398 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
399 * These will later be sorted in a linked list with at most num
403 /* Get the initial list of ciphers */
404 co_list_num = 0; /* actual count of ciphers */
405 for (i = 0; i < num_of_ciphers; i++)
407 c = ssl_method->get_cipher(i);
408 /* drop those that use any of that is not available */
409 if ((c != NULL) && c->valid && !(c->algorithms & mask))
411 co_list[co_list_num].cipher = c;
412 co_list[co_list_num].next = NULL;
413 co_list[co_list_num].prev = NULL;
414 co_list[co_list_num].active = 0;
417 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
418 #endif /* KSSL_DEBUG */
420 if (!sk_push(ca_list,(char *)c)) goto err;
426 * Prepare linked list from list entries
428 for (i = 1; i < co_list_num - 1; i++)
430 co_list[i].prev = &(co_list[i-1]);
431 co_list[i].next = &(co_list[i+1]);
435 (*head_p) = &(co_list[0]);
436 (*head_p)->prev = NULL;
437 (*head_p)->next = &(co_list[1]);
438 (*tail_p) = &(co_list[co_list_num - 1]);
439 (*tail_p)->prev = &(co_list[co_list_num - 2]);
440 (*tail_p)->next = NULL;
444 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
445 int num_of_group_aliases, unsigned long mask,
448 CIPHER_ORDER *ciph_curr;
449 SSL_CIPHER **ca_curr;
453 * First, add the real ciphers as already collected
457 while (ciph_curr != NULL)
459 *ca_curr = ciph_curr->cipher;
461 ciph_curr = ciph_curr->next;
465 * Now we add the available ones from the cipher_aliases[] table.
466 * They represent either an algorithm, that must be fully
467 * supported (not match any bit in mask) or represent a cipher
468 * strength value (will be added in any case because algorithms=0).
470 for (i = 0; i < num_of_group_aliases; i++)
472 if ((i == 0) || /* always fetch "ALL" */
473 !(cipher_aliases[i].algorithms & mask))
475 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
480 *ca_curr = NULL; /* end of list */
483 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
484 unsigned long algo_strength, unsigned long mask_strength,
485 int rule, int strength_bits, CIPHER_ORDER *co_list,
486 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
488 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
490 unsigned long ma, ma_s;
493 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
494 rule, algorithms, mask, algo_strength, mask_strength,
498 curr = head = *head_p;
500 tail2 = tail = *tail_p;
503 if ((curr == NULL) || (curr == tail2)) break;
510 * Selection criteria is either the number of strength_bits
511 * or the algorithm used.
513 if (strength_bits == -1)
515 ma = mask & cp->algorithms;
516 ma_s = mask_strength & cp->algo_strength;
519 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
520 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
523 * Select: if none of the mask bit was met from the
524 * cipher or not all of the bits were met, the
525 * selection does not apply.
527 if (((ma == 0) && (ma_s == 0)) ||
528 ((ma & algorithms) != ma) ||
529 ((ma_s & algo_strength) != ma_s))
530 continue; /* does not apply */
532 else if (strength_bits != cp->strength_bits)
533 continue; /* does not apply */
536 printf("Action = %d\n", rule);
539 /* add the cipher if it has not been added yet. */
540 if (rule == CIPHER_ADD)
544 ll_append_tail(&head, curr, &tail);
548 /* Move the added cipher to this location */
549 else if (rule == CIPHER_ORD)
553 ll_append_tail(&head, curr, &tail);
556 else if (rule == CIPHER_DEL)
558 else if (rule == CIPHER_KILL)
563 curr->prev->next = curr->next;
567 if (curr->next != NULL)
568 curr->next->prev = curr->prev;
569 if (curr->prev != NULL)
570 curr->prev->next = curr->next;
580 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
581 CIPHER_ORDER **head_p,
582 CIPHER_ORDER **tail_p)
584 int max_strength_bits, i, *number_uses;
588 * This routine sorts the ciphers with descending strength. The sorting
589 * must keep the pre-sorted sequence, so we apply the normal sorting
590 * routine as '+' movement to the end of the list.
592 max_strength_bits = 0;
597 (curr->cipher->strength_bits > max_strength_bits))
598 max_strength_bits = curr->cipher->strength_bits;
602 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
605 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
608 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
611 * Now find the strength_bits values actually used
617 number_uses[curr->cipher->strength_bits]++;
621 * Go through the list of used strength_bits values in descending
624 for (i = max_strength_bits; i >= 0; i--)
625 if (number_uses[i] > 0)
626 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
627 co_list, head_p, tail_p);
629 OPENSSL_free(number_uses);
633 static int ssl_cipher_process_rulestr(const char *rule_str,
634 CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
635 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
637 unsigned long algorithms, mask, algo_strength, mask_strength;
638 const char *l, *start, *buf;
639 int j, multi, found, rule, retval, ok, buflen;
651 { rule = CIPHER_DEL; l++; }
653 { rule = CIPHER_ORD; l++; }
655 { rule = CIPHER_KILL; l++; }
657 { rule = CIPHER_SPECIAL; l++; }
659 { rule = CIPHER_ADD; }
667 algorithms = mask = algo_strength = mask_strength = 0;
675 #ifndef CHARSET_EBCDIC
676 while ( ((ch >= 'A') && (ch <= 'Z')) ||
677 ((ch >= '0') && (ch <= '9')) ||
678 ((ch >= 'a') && (ch <= 'z')) ||
681 while ( isalnum(ch) || (ch == '-'))
691 * We hit something we cannot deal with,
692 * it is no command or separator nor
693 * alphanumeric, so we call this an error.
695 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
696 SSL_R_INVALID_COMMAND);
702 if (rule == CIPHER_SPECIAL)
704 found = 0; /* unused -- avoid compiler warning */
705 break; /* special treatment */
708 /* check for multi-part specification */
718 * Now search for the cipher alias in the ca_list. Be careful
719 * with the strncmp, because the "buflen" limitation
720 * will make the rule "ADH:SOME" and the cipher
721 * "ADH-MY-CIPHER" look like a match for buflen=3.
722 * So additionally check whether the cipher name found
723 * has the correct length. We can save a strlen() call:
724 * just checking for the '\0' at the right place is
725 * sufficient, we have to strncmp() anyway. (We cannot
726 * use strcmp(), because buf is not '\0' terminated.)
731 if (!strncmp(buf, ca_list[j]->name, buflen) &&
732 (ca_list[j]->name[buflen] == '\0'))
741 break; /* ignore this entry */
743 algorithms = (ca_list[j]->algorithms & ~mask) |
744 (ca_list[j]->algorithms & algorithms & mask);
745 mask |= ca_list[j]->mask;
746 algo_strength = (ca_list[j]->algo_strength & ~mask_strength) |
747 (ca_list[j]->algo_strength & algo_strength & mask_strength);
748 mask_strength |= ca_list[j]->mask_strength;
754 * Ok, we have the rule, now apply it
756 if (rule == CIPHER_SPECIAL)
757 { /* special command */
760 !strncmp(buf, "STRENGTH", 8))
761 ok = ssl_cipher_strength_sort(co_list,
764 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
765 SSL_R_INVALID_COMMAND);
769 * We do not support any "multi" options
770 * together with "@", so throw away the
771 * rest of the command, if any left, until
772 * end or ':' is found.
774 while ((*l != '\0') && ITEM_SEP(*l))
779 ssl_cipher_apply_rule(algorithms, mask,
780 algo_strength, mask_strength, rule, -1,
781 co_list, head_p, tail_p);
785 while ((*l != '\0') && ITEM_SEP(*l))
788 if (*l == '\0') break; /* done */
794 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
795 STACK_OF(SSL_CIPHER) **cipher_list,
796 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
797 const char *rule_str)
799 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
800 unsigned long disabled_mask;
801 STACK_OF(SSL_CIPHER) *cipherstack;
803 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
804 SSL_CIPHER **ca_list = NULL;
807 * Return with error if nothing to do.
809 if (rule_str == NULL) return(NULL);
813 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
814 if (init_ciphers) load_ciphers();
815 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
819 * To reduce the work to do we only want to process the compiled
820 * in algorithms, so we first get the mask of disabled ciphers.
822 disabled_mask = ssl_cipher_get_disabled();
825 * Now we have to collect the available ciphers from the compiled
826 * in ciphers. We cannot get more than the number compiled in, so
827 * it is used for allocation.
829 num_of_ciphers = ssl_method->num_ciphers();
831 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
832 #endif /* KSSL_DEBUG */
833 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
836 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
837 return(NULL); /* Failure */
840 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
841 co_list, &head, &tail);
844 * We also need cipher aliases for selecting based on the rule_str.
845 * There might be two types of entries in the rule_str: 1) names
846 * of ciphers themselves 2) aliases for groups of ciphers.
847 * For 1) we need the available ciphers and for 2) the cipher
848 * groups of cipher_aliases added together in one list (otherwise
849 * we would be happy with just the cipher_aliases table).
851 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
852 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
854 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
857 OPENSSL_free(co_list);
858 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
859 return(NULL); /* Failure */
861 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
865 * If the rule_string begins with DEFAULT, apply the default rule
866 * before using the (possibly available) additional rules.
870 if (strncmp(rule_str,"DEFAULT",7) == 0)
872 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
873 co_list, &head, &tail, ca_list);
879 if (ok && (strlen(rule_p) > 0))
880 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
883 OPENSSL_free(ca_list); /* Not needed anymore */
886 { /* Rule processing failure */
887 OPENSSL_free(co_list);
891 * Allocate new "cipherstack" for the result, return with error
892 * if we cannot get one.
894 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
896 OPENSSL_free(co_list);
901 * The cipher selection for the list is done. The ciphers are added
902 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
904 for (curr = head; curr != NULL; curr = curr->next)
908 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
910 printf("<%s>\n",curr->cipher->name);
914 OPENSSL_free(co_list); /* Not needed any longer */
915 /* if no ciphers where selected let's return NULL */
916 if (sk_SSL_CIPHER_num(cipherstack) == 0)
918 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
919 sk_SSL_CIPHER_free(cipherstack);
924 * The following passage is a little bit odd. If pointer variables
925 * were supplied to hold STACK_OF(SSL_CIPHER) return information,
926 * the old memory pointed to is free()ed. Then, however, the
927 * cipher_list entry will be assigned just a copy of the returned
928 * cipher stack. For cipher_list_by_id a copy of the cipher stack
929 * will be created. See next comment...
931 if (cipher_list != NULL)
933 if (*cipher_list != NULL)
934 sk_SSL_CIPHER_free(*cipher_list);
935 *cipher_list = cipherstack;
938 if (cipher_list_by_id != NULL)
940 if (*cipher_list_by_id != NULL)
941 sk_SSL_CIPHER_free(*cipher_list_by_id);
942 *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
946 * Now it is getting really strange. If something failed during
947 * the previous pointer assignment or if one of the pointers was
948 * not requested, the error condition is met. That might be
949 * discussable. The strange thing is however that in this case
950 * the memory "ret" pointed to is "free()ed" and hence the pointer
951 * cipher_list becomes wild. The memory reserved for
952 * cipher_list_by_id however is not "free()ed" and stays intact.
954 if ( (cipher_list_by_id == NULL) ||
955 (*cipher_list_by_id == NULL) ||
956 (cipher_list == NULL) ||
957 (*cipher_list == NULL))
959 sk_SSL_CIPHER_free(cipherstack);
963 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
968 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
970 int is_export,pkl,kl;
971 const char *ver,*exp_str;
972 const char *kx,*au,*enc,*mac;
973 unsigned long alg,alg2,alg_s;
975 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
977 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
978 #endif /* KSSL_DEBUG */
980 alg=cipher->algorithms;
981 alg_s=cipher->algo_strength;
982 alg2=cipher->algorithm2;
984 is_export=SSL_C_IS_EXPORT(cipher);
985 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
986 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
987 exp_str=is_export?" export":"";
991 else if (alg & SSL_SSLV3)
996 switch (alg&SSL_MKEY_MASK)
999 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1007 case SSL_kKRB5: /* VRS */
1008 case SSL_KRB5: /* VRS */
1015 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1019 kx=is_export?"ECDH(<=163)":"ECDH";
1025 switch (alg&SSL_AUTH_MASK)
1036 case SSL_aKRB5: /* VRS */
1037 case SSL_KRB5: /* VRS */
1052 switch (alg&SSL_ENC_MASK)
1055 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1061 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1062 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1065 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1077 switch(cipher->strength_bits)
1079 case 128: enc="AES(128)"; break;
1080 case 192: enc="AES(192)"; break;
1081 case 256: enc="AES(256)"; break;
1082 default: enc="AES(?""?""?)"; break;
1090 switch (alg&SSL_MAC_MASK)
1106 buf=OPENSSL_malloc(len);
1107 if (buf == NULL) return("OPENSSL_malloc Error");
1110 return("Buffer too small");
1113 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1115 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1116 #endif /* KSSL_DEBUG */
1120 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1124 if (c == NULL) return("(NONE)");
1125 i=(int)(c->id>>24L);
1127 return("TLSv1/SSLv3");
1134 /* return the actual cipher being used */
1135 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1142 /* number of bits for symmetric cipher */
1143 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1149 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1150 ret = c->strength_bits;
1155 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1160 if ((n == 0) || (sk == NULL)) return(NULL);
1161 nn=sk_SSL_COMP_num(sk);
1162 for (i=0; i<nn; i++)
1164 ctmp=sk_SSL_COMP_value(sk,i);
1171 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1173 load_builtin_compressions();
1174 return(ssl_comp_methods);
1177 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1181 if (cm == NULL || cm->type == NID_undef)
1184 /* According to draft-ietf-tls-compression-04.txt, the
1185 compression number ranges should be the following:
1187 0 to 63: methods defined by the IETF
1188 64 to 192: external party methods assigned by IANA
1189 193 to 255: reserved for private use */
1190 if (id < 193 || id > 255)
1192 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1197 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1200 load_builtin_compressions();
1201 if (ssl_comp_methods
1202 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1206 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1209 else if ((ssl_comp_methods == NULL)
1210 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1214 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1224 const char *SSL_COMP_get_name(const COMP_METHOD *comp)