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.
63 /* ====================================================================
64 * Copyright 2005 Nokia. All rights reserved.
66 * The portions of the attached software ("Contribution") is developed by
67 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
70 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
71 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
72 * support (see RFC 4279) to OpenSSL.
74 * No patent licenses or other rights except those expressly stated in
75 * the OpenSSL open source license shall be deemed granted or received
76 * expressly, by implication, estoppel, or otherwise.
78 * No assurances are provided by Nokia that the Contribution does not
79 * infringe the patent or other intellectual property rights of any third
80 * party or that the license provides you with all the necessary rights
81 * to make use of the Contribution.
83 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
84 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
85 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
86 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
91 #include <openssl/objects.h>
92 #include <openssl/comp.h>
95 #define SSL_ENC_DES_IDX 0
96 #define SSL_ENC_3DES_IDX 1
97 #define SSL_ENC_RC4_IDX 2
98 #define SSL_ENC_RC2_IDX 3
99 #define SSL_ENC_IDEA_IDX 4
100 #define SSL_ENC_eFZA_IDX 5
101 #define SSL_ENC_NULL_IDX 6
102 #define SSL_ENC_AES128_IDX 7
103 #define SSL_ENC_AES256_IDX 8
104 #define SSL_ENC_NUM_IDX 9
106 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
107 NULL,NULL,NULL,NULL,NULL,NULL,
110 #define SSL_COMP_NULL_IDX 0
111 #define SSL_COMP_ZLIB_IDX 1
112 #define SSL_COMP_NUM_IDX 2
114 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
116 #define SSL_MD_MD5_IDX 0
117 #define SSL_MD_SHA1_IDX 1
118 #define SSL_MD_NUM_IDX 2
119 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
124 #define CIPHER_KILL 2
127 #define CIPHER_SPECIAL 5
129 typedef struct cipher_order_st
134 struct cipher_order_st *next,*prev;
137 static const SSL_CIPHER cipher_aliases[]={
138 /* Don't include eNULL unless specifically enabled. */
139 /* Don't include ECC in ALL because these ciphers are not yet official. */
140 {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 */
141 /* TODO: COMPLEMENT OF ALL and COMPLEMENT OF DEFAULT do not have ECC cipher suites handled properly. */
142 {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, /* COMPLEMENT OF ALL */
143 {0,SSL_TXT_CMPDEF,0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK,0},
144 {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */
145 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0},
146 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0},
147 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0},
148 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0},
149 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0},
150 {0,SSL_TXT_kPSK,0,SSL_kPSK, 0,0,0,0,SSL_MKEY_MASK,0},
151 {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0},
152 {0,SSL_TXT_ECC, 0,(SSL_kECDH|SSL_kECDHE), 0,0,0,0,SSL_MKEY_MASK,0},
153 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0},
154 {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */
155 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0},
156 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0},
157 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0},
158 {0,SSL_TXT_aPSK,0,SSL_aPSK, 0,0,0,0,SSL_AUTH_MASK,0},
159 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0},
160 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0},
161 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0},
163 {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0},
164 {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0},
165 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0},
166 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0},
167 #ifndef OPENSSL_NO_IDEA
168 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
170 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
171 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
172 {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0},
174 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
175 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
176 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
178 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
179 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
180 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
181 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
182 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
183 {0,SSL_TXT_PSK, 0,SSL_PSK, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
185 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
186 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
187 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
189 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
190 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
191 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
192 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
193 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
194 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
195 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
198 void ssl_load_ciphers(void)
200 ssl_cipher_methods[SSL_ENC_DES_IDX]=
201 EVP_get_cipherbyname(SN_des_cbc);
202 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
203 EVP_get_cipherbyname(SN_des_ede3_cbc);
204 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
205 EVP_get_cipherbyname(SN_rc4);
206 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
207 EVP_get_cipherbyname(SN_rc2_cbc);
208 #ifndef OPENSSL_NO_IDEA
209 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
210 EVP_get_cipherbyname(SN_idea_cbc);
212 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
214 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
215 EVP_get_cipherbyname(SN_aes_128_cbc);
216 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
217 EVP_get_cipherbyname(SN_aes_256_cbc);
219 ssl_digest_methods[SSL_MD_MD5_IDX]=
220 EVP_get_digestbyname(SN_md5);
221 ssl_digest_methods[SSL_MD_SHA1_IDX]=
222 EVP_get_digestbyname(SN_sha1);
226 #ifndef OPENSSL_NO_COMP
228 static int sk_comp_cmp(const SSL_COMP * const *a,
229 const SSL_COMP * const *b)
231 return((*a)->id-(*b)->id);
234 static void load_builtin_compressions(void)
236 if (ssl_comp_methods != NULL)
239 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
240 if (ssl_comp_methods == NULL)
242 SSL_COMP *comp = NULL;
245 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
246 if (ssl_comp_methods != NULL)
248 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
251 comp->method=COMP_zlib();
253 && comp->method->type == NID_undef)
257 comp->id=SSL_COMP_ZLIB_IDX;
258 comp->name=comp->method->name;
259 sk_SSL_COMP_push(ssl_comp_methods,comp);
265 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
269 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
270 const EVP_MD **md, SSL_COMP **comp)
276 if (c == NULL) return(0);
280 #ifndef OPENSSL_NO_COMP
281 load_builtin_compressions();
285 ctmp.id=s->compress_meth;
286 if (ssl_comp_methods != NULL)
288 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
290 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
296 if ((enc == NULL) || (md == NULL)) return(0);
298 switch (c->algorithms & SSL_ENC_MASK)
321 case 128: i=SSL_ENC_AES128_IDX; break;
322 case 256: i=SSL_ENC_AES256_IDX; break;
323 default: i=-1; break;
331 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
335 if (i == SSL_ENC_NULL_IDX)
338 *enc=ssl_cipher_methods[i];
341 switch (c->algorithms & SSL_MAC_MASK)
353 if ((i < 0) || (i > SSL_MD_NUM_IDX))
356 *md=ssl_digest_methods[i];
358 if ((*enc != NULL) && (*md != NULL))
364 #define ITEM_SEP(a) \
365 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
367 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
370 if (curr == *tail) return;
373 if (curr->prev != NULL)
374 curr->prev->next=curr->next;
375 if (curr->next != NULL) /* should always be true */
376 curr->next->prev=curr->prev;
383 static unsigned long ssl_cipher_get_disabled(void)
388 #ifdef OPENSSL_NO_RSA
389 mask |= SSL_aRSA|SSL_kRSA;
391 #ifdef OPENSSL_NO_DSA
395 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
397 #ifdef OPENSSL_NO_KRB5
398 mask |= SSL_kKRB5|SSL_aKRB5;
400 #ifdef OPENSSL_NO_ECDH
401 mask |= SSL_kECDH|SSL_kECDHE;
403 #ifdef OPENSSL_NO_PSK
406 #ifdef SSL_FORBID_ENULL
410 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
411 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
412 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
413 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
414 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
415 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
416 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
418 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
419 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
424 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
425 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
426 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
432 * We have num_of_ciphers descriptions compiled in, depending on the
433 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
434 * These will later be sorted in a linked list with at most num
438 /* Get the initial list of ciphers */
439 co_list_num = 0; /* actual count of ciphers */
440 for (i = 0; i < num_of_ciphers; i++)
442 c = ssl_method->get_cipher(i);
443 /* drop those that use any of that is not available */
444 if ((c != NULL) && c->valid && !(c->algorithms & mask))
446 co_list[co_list_num].cipher = c;
447 co_list[co_list_num].next = NULL;
448 co_list[co_list_num].prev = NULL;
449 co_list[co_list_num].active = 0;
452 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
453 #endif /* KSSL_DEBUG */
455 if (!sk_push(ca_list,(char *)c)) goto err;
461 * Prepare linked list from list entries
463 for (i = 1; i < co_list_num - 1; i++)
465 co_list[i].prev = &(co_list[i-1]);
466 co_list[i].next = &(co_list[i+1]);
470 (*head_p) = &(co_list[0]);
471 (*head_p)->prev = NULL;
472 (*head_p)->next = &(co_list[1]);
473 (*tail_p) = &(co_list[co_list_num - 1]);
474 (*tail_p)->prev = &(co_list[co_list_num - 2]);
475 (*tail_p)->next = NULL;
479 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
480 int num_of_group_aliases, unsigned long mask,
483 CIPHER_ORDER *ciph_curr;
484 SSL_CIPHER **ca_curr;
488 * First, add the real ciphers as already collected
492 while (ciph_curr != NULL)
494 *ca_curr = ciph_curr->cipher;
496 ciph_curr = ciph_curr->next;
500 * Now we add the available ones from the cipher_aliases[] table.
501 * They represent either an algorithm, that must be fully
502 * supported (not match any bit in mask) or represent a cipher
503 * strength value (will be added in any case because algorithms=0).
505 for (i = 0; i < num_of_group_aliases; i++)
507 if ((i == 0) || /* always fetch "ALL" */
508 !(cipher_aliases[i].algorithms & mask))
510 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
515 *ca_curr = NULL; /* end of list */
518 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
519 unsigned long algo_strength, unsigned long mask_strength,
520 int rule, int strength_bits, CIPHER_ORDER *co_list,
521 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
523 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
525 unsigned long ma, ma_s;
528 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
529 rule, algorithms, mask, algo_strength, mask_strength,
533 curr = head = *head_p;
535 tail2 = tail = *tail_p;
538 if ((curr == NULL) || (curr == tail2)) break;
545 * Selection criteria is either the number of strength_bits
546 * or the algorithm used.
548 if (strength_bits == -1)
550 ma = mask & cp->algorithms;
551 ma_s = mask_strength & cp->algo_strength;
554 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
555 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
558 * Select: if none of the mask bit was met from the
559 * cipher or not all of the bits were met, the
560 * selection does not apply.
562 if (((ma == 0) && (ma_s == 0)) ||
563 ((ma & algorithms) != ma) ||
564 ((ma_s & algo_strength) != ma_s))
565 continue; /* does not apply */
567 else if (strength_bits != cp->strength_bits)
568 continue; /* does not apply */
571 printf("Action = %d\n", rule);
574 /* add the cipher if it has not been added yet. */
575 if (rule == CIPHER_ADD)
579 ll_append_tail(&head, curr, &tail);
583 /* Move the added cipher to this location */
584 else if (rule == CIPHER_ORD)
588 ll_append_tail(&head, curr, &tail);
591 else if (rule == CIPHER_DEL)
593 else if (rule == CIPHER_KILL)
598 curr->prev->next = curr->next;
602 if (curr->next != NULL)
603 curr->next->prev = curr->prev;
604 if (curr->prev != NULL)
605 curr->prev->next = curr->next;
615 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
616 CIPHER_ORDER **head_p,
617 CIPHER_ORDER **tail_p)
619 int max_strength_bits, i, *number_uses;
623 * This routine sorts the ciphers with descending strength. The sorting
624 * must keep the pre-sorted sequence, so we apply the normal sorting
625 * routine as '+' movement to the end of the list.
627 max_strength_bits = 0;
632 (curr->cipher->strength_bits > max_strength_bits))
633 max_strength_bits = curr->cipher->strength_bits;
637 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
640 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
643 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
646 * Now find the strength_bits values actually used
652 number_uses[curr->cipher->strength_bits]++;
656 * Go through the list of used strength_bits values in descending
659 for (i = max_strength_bits; i >= 0; i--)
660 if (number_uses[i] > 0)
661 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
662 co_list, head_p, tail_p);
664 OPENSSL_free(number_uses);
668 static int ssl_cipher_process_rulestr(const char *rule_str,
669 CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
670 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
672 unsigned long algorithms, mask, algo_strength, mask_strength;
673 const char *l, *start, *buf;
674 int j, multi, found, rule, retval, ok, buflen;
686 { rule = CIPHER_DEL; l++; }
688 { rule = CIPHER_ORD; l++; }
690 { rule = CIPHER_KILL; l++; }
692 { rule = CIPHER_SPECIAL; l++; }
694 { rule = CIPHER_ADD; }
702 algorithms = mask = algo_strength = mask_strength = 0;
710 #ifndef CHARSET_EBCDIC
711 while ( ((ch >= 'A') && (ch <= 'Z')) ||
712 ((ch >= '0') && (ch <= '9')) ||
713 ((ch >= 'a') && (ch <= 'z')) ||
716 while ( isalnum(ch) || (ch == '-'))
726 * We hit something we cannot deal with,
727 * it is no command or separator nor
728 * alphanumeric, so we call this an error.
730 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
731 SSL_R_INVALID_COMMAND);
737 if (rule == CIPHER_SPECIAL)
739 found = 0; /* unused -- avoid compiler warning */
740 break; /* special treatment */
743 /* check for multi-part specification */
753 * Now search for the cipher alias in the ca_list. Be careful
754 * with the strncmp, because the "buflen" limitation
755 * will make the rule "ADH:SOME" and the cipher
756 * "ADH-MY-CIPHER" look like a match for buflen=3.
757 * So additionally check whether the cipher name found
758 * has the correct length. We can save a strlen() call:
759 * just checking for the '\0' at the right place is
760 * sufficient, we have to strncmp() anyway. (We cannot
761 * use strcmp(), because buf is not '\0' terminated.)
766 if (!strncmp(buf, ca_list[j]->name, buflen) &&
767 (ca_list[j]->name[buflen] == '\0'))
776 break; /* ignore this entry */
779 * 1 - any old restrictions apply outside new mask
780 * 2 - any new restrictions apply outside old mask
781 * 3 - enforce old & new where masks intersect
783 algorithms = (algorithms & ~ca_list[j]->mask) | /* 1 */
784 (ca_list[j]->algorithms & ~mask) | /* 2 */
785 (algorithms & ca_list[j]->algorithms); /* 3 */
786 mask |= ca_list[j]->mask;
787 algo_strength = (algo_strength & ~ca_list[j]->mask_strength) |
788 (ca_list[j]->algo_strength & ~mask_strength) |
789 (algo_strength & ca_list[j]->algo_strength);
790 mask_strength |= ca_list[j]->mask_strength;
796 * Ok, we have the rule, now apply it
798 if (rule == CIPHER_SPECIAL)
799 { /* special command */
802 !strncmp(buf, "STRENGTH", 8))
803 ok = ssl_cipher_strength_sort(co_list,
806 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
807 SSL_R_INVALID_COMMAND);
811 * We do not support any "multi" options
812 * together with "@", so throw away the
813 * rest of the command, if any left, until
814 * end or ':' is found.
816 while ((*l != '\0') && ITEM_SEP(*l))
821 ssl_cipher_apply_rule(algorithms, mask,
822 algo_strength, mask_strength, rule, -1,
823 co_list, head_p, tail_p);
827 while ((*l != '\0') && ITEM_SEP(*l))
830 if (*l == '\0') break; /* done */
836 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
837 STACK_OF(SSL_CIPHER) **cipher_list,
838 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
839 const char *rule_str)
841 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
842 unsigned long disabled_mask;
843 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
845 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
846 SSL_CIPHER **ca_list = NULL;
849 * Return with error if nothing to do.
851 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
855 * To reduce the work to do we only want to process the compiled
856 * in algorithms, so we first get the mask of disabled ciphers.
858 disabled_mask = ssl_cipher_get_disabled();
861 * Now we have to collect the available ciphers from the compiled
862 * in ciphers. We cannot get more than the number compiled in, so
863 * it is used for allocation.
865 num_of_ciphers = ssl_method->num_ciphers();
867 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
868 #endif /* KSSL_DEBUG */
869 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
872 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
873 return(NULL); /* Failure */
876 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
877 co_list, &head, &tail);
880 * We also need cipher aliases for selecting based on the rule_str.
881 * There might be two types of entries in the rule_str: 1) names
882 * of ciphers themselves 2) aliases for groups of ciphers.
883 * For 1) we need the available ciphers and for 2) the cipher
884 * groups of cipher_aliases added together in one list (otherwise
885 * we would be happy with just the cipher_aliases table).
887 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
888 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
890 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
893 OPENSSL_free(co_list);
894 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
895 return(NULL); /* Failure */
897 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
901 * If the rule_string begins with DEFAULT, apply the default rule
902 * before using the (possibly available) additional rules.
906 if (strncmp(rule_str,"DEFAULT",7) == 0)
908 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
909 co_list, &head, &tail, ca_list);
915 if (ok && (strlen(rule_p) > 0))
916 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
919 OPENSSL_free(ca_list); /* Not needed anymore */
922 { /* Rule processing failure */
923 OPENSSL_free(co_list);
927 * Allocate new "cipherstack" for the result, return with error
928 * if we cannot get one.
930 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
932 OPENSSL_free(co_list);
937 * The cipher selection for the list is done. The ciphers are added
938 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
940 for (curr = head; curr != NULL; curr = curr->next)
944 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
946 printf("<%s>\n",curr->cipher->name);
950 OPENSSL_free(co_list); /* Not needed any longer */
952 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
953 if (tmp_cipher_list == NULL)
955 sk_SSL_CIPHER_free(cipherstack);
958 if (*cipher_list != NULL)
959 sk_SSL_CIPHER_free(*cipher_list);
960 *cipher_list = cipherstack;
961 if (*cipher_list_by_id != NULL)
962 sk_SSL_CIPHER_free(*cipher_list_by_id);
963 *cipher_list_by_id = tmp_cipher_list;
964 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
969 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
971 int is_export,pkl,kl;
972 const char *ver,*exp_str;
973 const char *kx,*au,*enc,*mac;
974 unsigned long alg,alg2,alg_s;
976 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
978 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
979 #endif /* KSSL_DEBUG */
981 alg=cipher->algorithms;
982 alg_s=cipher->algo_strength;
983 alg2=cipher->algorithm2;
985 is_export=SSL_C_IS_EXPORT(cipher);
986 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
987 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
988 exp_str=is_export?" export":"";
992 else if (alg & SSL_SSLV3)
997 switch (alg&SSL_MKEY_MASK)
1000 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1008 case SSL_kKRB5: /* VRS */
1009 case SSL_KRB5: /* VRS */
1016 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1020 kx=is_export?"ECDH(<=163)":"ECDH";
1029 switch (alg&SSL_AUTH_MASK)
1040 case SSL_aKRB5: /* VRS */
1041 case SSL_KRB5: /* VRS */
1059 switch (alg&SSL_ENC_MASK)
1062 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1068 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1069 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1072 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1084 switch(cipher->strength_bits)
1086 case 128: enc="AES(128)"; break;
1087 case 192: enc="AES(192)"; break;
1088 case 256: enc="AES(256)"; break;
1089 default: enc="AES(?""?""?)"; break;
1097 switch (alg&SSL_MAC_MASK)
1113 buf=OPENSSL_malloc(len);
1114 if (buf == NULL) return("OPENSSL_malloc Error");
1117 return("Buffer too small");
1120 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1122 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1123 #endif /* KSSL_DEBUG */
1127 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1131 if (c == NULL) return("(NONE)");
1132 i=(int)(c->id>>24L);
1134 return("TLSv1/SSLv3");
1141 /* return the actual cipher being used */
1142 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1149 /* number of bits for symmetric cipher */
1150 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1156 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1157 ret = c->strength_bits;
1162 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1167 if ((n == 0) || (sk == NULL)) return(NULL);
1168 nn=sk_SSL_COMP_num(sk);
1169 for (i=0; i<nn; i++)
1171 ctmp=sk_SSL_COMP_value(sk,i);
1178 #ifdef OPENSSL_NO_COMP
1179 void *SSL_COMP_get_compression_methods(void)
1183 int SSL_COMP_add_compression_method(int id, void *cm)
1188 const char *SSL_COMP_get_name(const void *comp)
1193 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1195 load_builtin_compressions();
1196 return(ssl_comp_methods);
1199 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1203 if (cm == NULL || cm->type == NID_undef)
1206 /* According to draft-ietf-tls-compression-04.txt, the
1207 compression number ranges should be the following:
1209 0 to 63: methods defined by the IETF
1210 64 to 192: external party methods assigned by IANA
1211 193 to 255: reserved for private use */
1212 if (id < 193 || id > 255)
1214 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1219 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1222 load_builtin_compressions();
1223 if (ssl_comp_methods
1224 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1228 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1231 else if ((ssl_comp_methods == NULL)
1232 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1236 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1246 const char *SSL_COMP_get_name(const COMP_METHOD *comp)