1 /* ssl/ssl_ciph.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
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.
62 */
63 #include <stdio.h>
64 #include <openssl/objects.h>
65 #include <openssl/comp.h>
66 #include "ssl_locl.h"
67
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
78
79 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
80 NULL,NULL,NULL,NULL,NULL,NULL,
81 };
82
83 #define SSL_COMP_NULL_IDX 0
84 #define SSL_COMP_ZLIB_IDX 1
85 #define SSL_COMP_NUM_IDX 2
86
87 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
88
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]={
93 NULL,NULL,
94 };
95
96 #define CIPHER_ADD 1
97 #define CIPHER_KILL 2
98 #define CIPHER_DEL 3
99 #define CIPHER_ORD 4
100 #define CIPHER_SPECIAL 5
101
102 typedef struct cipher_order_st
103 {
104 SSL_CIPHER *cipher;
105 int active;
106 int dead;
107 struct cipher_order_st *next,*prev;
108 } CIPHER_ORDER;
109
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},
133
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},
140 #endif
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},
144
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},
148
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},
154
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},
158
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},
166 };
167
ssl_load_ciphers(void)168 void ssl_load_ciphers(void)
169 {
170 ssl_cipher_methods[SSL_ENC_DES_IDX]=
171 EVP_get_cipherbyname(SN_des_cbc);
172 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
173 EVP_get_cipherbyname(SN_des_ede3_cbc);
174 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
175 EVP_get_cipherbyname(SN_rc4);
176 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
177 EVP_get_cipherbyname(SN_rc2_cbc);
178 #ifndef OPENSSL_NO_IDEA
179 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
180 EVP_get_cipherbyname(SN_idea_cbc);
181 #else
182 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
183 #endif
184 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
185 EVP_get_cipherbyname(SN_aes_128_cbc);
186 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
187 EVP_get_cipherbyname(SN_aes_256_cbc);
188
189 ssl_digest_methods[SSL_MD_MD5_IDX]=
190 EVP_get_digestbyname(SN_md5);
191 ssl_digest_methods[SSL_MD_SHA1_IDX]=
192 EVP_get_digestbyname(SN_sha1);
193 }
194
195
196 #ifndef OPENSSL_NO_COMP
197
sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)198 static int sk_comp_cmp(const SSL_COMP * const *a,
199 const SSL_COMP * const *b)
200 {
201 return((*a)->id-(*b)->id);
202 }
203
load_builtin_compressions(void)204 static void load_builtin_compressions(void)
205 {
206 if (ssl_comp_methods != NULL)
207 return;
208
209 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
210 if (ssl_comp_methods == NULL)
211 {
212 SSL_COMP *comp = NULL;
213
214 MemCheck_off();
215 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
216 if (ssl_comp_methods != NULL)
217 {
218 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
219 if (comp != NULL)
220 {
221 comp->method=COMP_zlib();
222 if (comp->method
223 && comp->method->type == NID_undef)
224 OPENSSL_free(comp);
225 else
226 {
227 comp->id=SSL_COMP_ZLIB_IDX;
228 comp->name=comp->method->name;
229 sk_SSL_COMP_push(ssl_comp_methods,comp);
230 }
231 }
232 }
233 MemCheck_on();
234 }
235 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
236 }
237 #endif
238
ssl_cipher_get_evp(const SSL_SESSION * s,const EVP_CIPHER ** enc,const EVP_MD ** md,SSL_COMP ** comp)239 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
240 const EVP_MD **md, SSL_COMP **comp)
241 {
242 int i;
243 SSL_CIPHER *c;
244
245 c=s->cipher;
246 if (c == NULL) return(0);
247 if (comp != NULL)
248 {
249 SSL_COMP ctmp;
250 #ifndef OPENSSL_NO_COMP
251 load_builtin_compressions();
252 #endif
253
254 *comp=NULL;
255 ctmp.id=s->compress_meth;
256 if (ssl_comp_methods != NULL)
257 {
258 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
259 if (i >= 0)
260 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
261 else
262 *comp=NULL;
263 }
264 }
265
266 if ((enc == NULL) || (md == NULL)) return(0);
267
268 switch (c->algorithms & SSL_ENC_MASK)
269 {
270 case SSL_DES:
271 i=SSL_ENC_DES_IDX;
272 break;
273 case SSL_3DES:
274 i=SSL_ENC_3DES_IDX;
275 break;
276 case SSL_RC4:
277 i=SSL_ENC_RC4_IDX;
278 break;
279 case SSL_RC2:
280 i=SSL_ENC_RC2_IDX;
281 break;
282 case SSL_IDEA:
283 i=SSL_ENC_IDEA_IDX;
284 break;
285 case SSL_eNULL:
286 i=SSL_ENC_NULL_IDX;
287 break;
288 case SSL_AES:
289 switch(c->alg_bits)
290 {
291 case 128: i=SSL_ENC_AES128_IDX; break;
292 case 256: i=SSL_ENC_AES256_IDX; break;
293 default: i=-1; break;
294 }
295 break;
296 default:
297 i= -1;
298 break;
299 }
300
301 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
302 *enc=NULL;
303 else
304 {
305 if (i == SSL_ENC_NULL_IDX)
306 *enc=EVP_enc_null();
307 else
308 *enc=ssl_cipher_methods[i];
309 }
310
311 switch (c->algorithms & SSL_MAC_MASK)
312 {
313 case SSL_MD5:
314 i=SSL_MD_MD5_IDX;
315 break;
316 case SSL_SHA1:
317 i=SSL_MD_SHA1_IDX;
318 break;
319 default:
320 i= -1;
321 break;
322 }
323 if ((i < 0) || (i > SSL_MD_NUM_IDX))
324 *md=NULL;
325 else
326 *md=ssl_digest_methods[i];
327
328 if ((*enc != NULL) && (*md != NULL))
329 return(1);
330 else
331 return(0);
332 }
333
334 #define ITEM_SEP(a) \
335 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
336
ll_append_tail(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)337 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
338 CIPHER_ORDER **tail)
339 {
340 if (curr == *tail) return;
341 if (curr == *head)
342 *head=curr->next;
343 if (curr->prev != NULL)
344 curr->prev->next=curr->next;
345 if (curr->next != NULL) /* should always be true */
346 curr->next->prev=curr->prev;
347 (*tail)->next=curr;
348 curr->prev= *tail;
349 curr->next=NULL;
350 *tail=curr;
351 }
352
ssl_cipher_get_disabled(void)353 static unsigned long ssl_cipher_get_disabled(void)
354 {
355 unsigned long mask;
356
357 mask = SSL_kFZA;
358 #ifdef OPENSSL_NO_RSA
359 mask |= SSL_aRSA|SSL_kRSA;
360 #endif
361 #ifdef OPENSSL_NO_DSA
362 mask |= SSL_aDSS;
363 #endif
364 #ifdef OPENSSL_NO_DH
365 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
366 #endif
367 #ifdef OPENSSL_NO_KRB5
368 mask |= SSL_kKRB5|SSL_aKRB5;
369 #endif
370 #ifdef OPENSSL_NO_ECDH
371 mask |= SSL_kECDH|SSL_kECDHE;
372 #endif
373 #ifdef SSL_FORBID_ENULL
374 mask |= SSL_eNULL;
375 #endif
376
377 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
378 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
379 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
380 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
381 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
382 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
383 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
384
385 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
386 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
387
388 return(mask);
389 }
390
ssl_cipher_collect_ciphers(const SSL_METHOD * ssl_method,int num_of_ciphers,unsigned long mask,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)391 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
392 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
393 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
394 {
395 int i, co_list_num;
396 SSL_CIPHER *c;
397
398 /*
399 * We have num_of_ciphers descriptions compiled in, depending on the
400 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
401 * These will later be sorted in a linked list with at most num
402 * entries.
403 */
404
405 /* Get the initial list of ciphers */
406 co_list_num = 0; /* actual count of ciphers */
407 for (i = 0; i < num_of_ciphers; i++)
408 {
409 c = ssl_method->get_cipher(i);
410 /* drop those that use any of that is not available */
411 if ((c != NULL) && c->valid && !(c->algorithms & mask))
412 {
413 co_list[co_list_num].cipher = c;
414 co_list[co_list_num].next = NULL;
415 co_list[co_list_num].prev = NULL;
416 co_list[co_list_num].active = 0;
417 co_list_num++;
418 #ifdef KSSL_DEBUG
419 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
420 #endif /* KSSL_DEBUG */
421 /*
422 if (!sk_push(ca_list,(char *)c)) goto err;
423 */
424 }
425 }
426
427 /*
428 * Prepare linked list from list entries
429 */
430 for (i = 1; i < co_list_num - 1; i++)
431 {
432 co_list[i].prev = &(co_list[i-1]);
433 co_list[i].next = &(co_list[i+1]);
434 }
435 if (co_list_num > 0)
436 {
437 (*head_p) = &(co_list[0]);
438 (*head_p)->prev = NULL;
439 (*head_p)->next = &(co_list[1]);
440 (*tail_p) = &(co_list[co_list_num - 1]);
441 (*tail_p)->prev = &(co_list[co_list_num - 2]);
442 (*tail_p)->next = NULL;
443 }
444 }
445
ssl_cipher_collect_aliases(SSL_CIPHER ** ca_list,int num_of_group_aliases,unsigned long mask,CIPHER_ORDER * head)446 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
447 int num_of_group_aliases, unsigned long mask,
448 CIPHER_ORDER *head)
449 {
450 CIPHER_ORDER *ciph_curr;
451 SSL_CIPHER **ca_curr;
452 int i;
453
454 /*
455 * First, add the real ciphers as already collected
456 */
457 ciph_curr = head;
458 ca_curr = ca_list;
459 while (ciph_curr != NULL)
460 {
461 *ca_curr = ciph_curr->cipher;
462 ca_curr++;
463 ciph_curr = ciph_curr->next;
464 }
465
466 /*
467 * Now we add the available ones from the cipher_aliases[] table.
468 * They represent either an algorithm, that must be fully
469 * supported (not match any bit in mask) or represent a cipher
470 * strength value (will be added in any case because algorithms=0).
471 */
472 for (i = 0; i < num_of_group_aliases; i++)
473 {
474 if ((i == 0) || /* always fetch "ALL" */
475 !(cipher_aliases[i].algorithms & mask))
476 {
477 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
478 ca_curr++;
479 }
480 }
481
482 *ca_curr = NULL; /* end of list */
483 }
484
ssl_cipher_apply_rule(unsigned long algorithms,unsigned long mask,unsigned long algo_strength,unsigned long mask_strength,int rule,int strength_bits,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)485 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
486 unsigned long algo_strength, unsigned long mask_strength,
487 int rule, int strength_bits, CIPHER_ORDER *co_list,
488 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
489 {
490 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
491 SSL_CIPHER *cp;
492 unsigned long ma, ma_s;
493
494 #ifdef CIPHER_DEBUG
495 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
496 rule, algorithms, mask, algo_strength, mask_strength,
497 strength_bits);
498 #endif
499
500 curr = head = *head_p;
501 curr2 = head;
502 tail2 = tail = *tail_p;
503 for (;;)
504 {
505 if ((curr == NULL) || (curr == tail2)) break;
506 curr = curr2;
507 curr2 = curr->next;
508
509 cp = curr->cipher;
510
511 /*
512 * Selection criteria is either the number of strength_bits
513 * or the algorithm used.
514 */
515 if (strength_bits == -1)
516 {
517 ma = mask & cp->algorithms;
518 ma_s = mask_strength & cp->algo_strength;
519
520 #ifdef CIPHER_DEBUG
521 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
522 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
523 #endif
524 /*
525 * Select: if none of the mask bit was met from the
526 * cipher or not all of the bits were met, the
527 * selection does not apply.
528 */
529 if (((ma == 0) && (ma_s == 0)) ||
530 ((ma & algorithms) != ma) ||
531 ((ma_s & algo_strength) != ma_s))
532 continue; /* does not apply */
533 }
534 else if (strength_bits != cp->strength_bits)
535 continue; /* does not apply */
536
537 #ifdef CIPHER_DEBUG
538 printf("Action = %d\n", rule);
539 #endif
540
541 /* add the cipher if it has not been added yet. */
542 if (rule == CIPHER_ADD)
543 {
544 if (!curr->active)
545 {
546 ll_append_tail(&head, curr, &tail);
547 curr->active = 1;
548 }
549 }
550 /* Move the added cipher to this location */
551 else if (rule == CIPHER_ORD)
552 {
553 if (curr->active)
554 {
555 ll_append_tail(&head, curr, &tail);
556 }
557 }
558 else if (rule == CIPHER_DEL)
559 curr->active = 0;
560 else if (rule == CIPHER_KILL)
561 {
562 if (head == curr)
563 head = curr->next;
564 else
565 curr->prev->next = curr->next;
566 if (tail == curr)
567 tail = curr->prev;
568 curr->active = 0;
569 if (curr->next != NULL)
570 curr->next->prev = curr->prev;
571 if (curr->prev != NULL)
572 curr->prev->next = curr->next;
573 curr->next = NULL;
574 curr->prev = NULL;
575 }
576 }
577
578 *head_p = head;
579 *tail_p = tail;
580 }
581
ssl_cipher_strength_sort(CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)582 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
583 CIPHER_ORDER **head_p,
584 CIPHER_ORDER **tail_p)
585 {
586 int max_strength_bits, i, *number_uses;
587 CIPHER_ORDER *curr;
588
589 /*
590 * This routine sorts the ciphers with descending strength. The sorting
591 * must keep the pre-sorted sequence, so we apply the normal sorting
592 * routine as '+' movement to the end of the list.
593 */
594 max_strength_bits = 0;
595 curr = *head_p;
596 while (curr != NULL)
597 {
598 if (curr->active &&
599 (curr->cipher->strength_bits > max_strength_bits))
600 max_strength_bits = curr->cipher->strength_bits;
601 curr = curr->next;
602 }
603
604 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
605 if (!number_uses)
606 {
607 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
608 return(0);
609 }
610 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
611
612 /*
613 * Now find the strength_bits values actually used
614 */
615 curr = *head_p;
616 while (curr != NULL)
617 {
618 if (curr->active)
619 number_uses[curr->cipher->strength_bits]++;
620 curr = curr->next;
621 }
622 /*
623 * Go through the list of used strength_bits values in descending
624 * order.
625 */
626 for (i = max_strength_bits; i >= 0; i--)
627 if (number_uses[i] > 0)
628 ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
629 co_list, head_p, tail_p);
630
631 OPENSSL_free(number_uses);
632 return(1);
633 }
634
ssl_cipher_process_rulestr(const char * rule_str,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p,SSL_CIPHER ** ca_list)635 static int ssl_cipher_process_rulestr(const char *rule_str,
636 CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
637 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
638 {
639 unsigned long algorithms, mask, algo_strength, mask_strength;
640 const char *l, *start, *buf;
641 int j, multi, found, rule, retval, ok, buflen;
642 char ch;
643
644 retval = 1;
645 l = rule_str;
646 for (;;)
647 {
648 ch = *l;
649
650 if (ch == '\0')
651 break; /* done */
652 if (ch == '-')
653 { rule = CIPHER_DEL; l++; }
654 else if (ch == '+')
655 { rule = CIPHER_ORD; l++; }
656 else if (ch == '!')
657 { rule = CIPHER_KILL; l++; }
658 else if (ch == '@')
659 { rule = CIPHER_SPECIAL; l++; }
660 else
661 { rule = CIPHER_ADD; }
662
663 if (ITEM_SEP(ch))
664 {
665 l++;
666 continue;
667 }
668
669 algorithms = mask = algo_strength = mask_strength = 0;
670
671 start=l;
672 for (;;)
673 {
674 ch = *l;
675 buf = l;
676 buflen = 0;
677 #ifndef CHARSET_EBCDIC
678 while ( ((ch >= 'A') && (ch <= 'Z')) ||
679 ((ch >= '0') && (ch <= '9')) ||
680 ((ch >= 'a') && (ch <= 'z')) ||
681 (ch == '-'))
682 #else
683 while ( isalnum(ch) || (ch == '-'))
684 #endif
685 {
686 ch = *(++l);
687 buflen++;
688 }
689
690 if (buflen == 0)
691 {
692 /*
693 * We hit something we cannot deal with,
694 * it is no command or separator nor
695 * alphanumeric, so we call this an error.
696 */
697 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
698 SSL_R_INVALID_COMMAND);
699 retval = found = 0;
700 l++;
701 break;
702 }
703
704 if (rule == CIPHER_SPECIAL)
705 {
706 found = 0; /* unused -- avoid compiler warning */
707 break; /* special treatment */
708 }
709
710 /* check for multi-part specification */
711 if (ch == '+')
712 {
713 multi=1;
714 l++;
715 }
716 else
717 multi=0;
718
719 /*
720 * Now search for the cipher alias in the ca_list. Be careful
721 * with the strncmp, because the "buflen" limitation
722 * will make the rule "ADH:SOME" and the cipher
723 * "ADH-MY-CIPHER" look like a match for buflen=3.
724 * So additionally check whether the cipher name found
725 * has the correct length. We can save a strlen() call:
726 * just checking for the '\0' at the right place is
727 * sufficient, we have to strncmp() anyway. (We cannot
728 * use strcmp(), because buf is not '\0' terminated.)
729 */
730 j = found = 0;
731 while (ca_list[j])
732 {
733 if (!strncmp(buf, ca_list[j]->name, buflen) &&
734 (ca_list[j]->name[buflen] == '\0'))
735 {
736 found = 1;
737 break;
738 }
739 else
740 j++;
741 }
742 if (!found)
743 break; /* ignore this entry */
744
745 /* New algorithms:
746 * 1 - any old restrictions apply outside new mask
747 * 2 - any new restrictions apply outside old mask
748 * 3 - enforce old & new where masks intersect
749 */
750 algorithms = (algorithms & ~ca_list[j]->mask) | /* 1 */
751 (ca_list[j]->algorithms & ~mask) | /* 2 */
752 (algorithms & ca_list[j]->algorithms); /* 3 */
753 mask |= ca_list[j]->mask;
754 algo_strength = (algo_strength & ~ca_list[j]->mask_strength) |
755 (ca_list[j]->algo_strength & ~mask_strength) |
756 (algo_strength & ca_list[j]->algo_strength);
757 mask_strength |= ca_list[j]->mask_strength;
758
759 if (!multi) break;
760 }
761
762 /*
763 * Ok, we have the rule, now apply it
764 */
765 if (rule == CIPHER_SPECIAL)
766 { /* special command */
767 ok = 0;
768 if ((buflen == 8) &&
769 !strncmp(buf, "STRENGTH", 8))
770 ok = ssl_cipher_strength_sort(co_list,
771 head_p, tail_p);
772 else
773 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
774 SSL_R_INVALID_COMMAND);
775 if (ok == 0)
776 retval = 0;
777 /*
778 * We do not support any "multi" options
779 * together with "@", so throw away the
780 * rest of the command, if any left, until
781 * end or ':' is found.
782 */
783 while ((*l != '\0') && ITEM_SEP(*l))
784 l++;
785 }
786 else if (found)
787 {
788 ssl_cipher_apply_rule(algorithms, mask,
789 algo_strength, mask_strength, rule, -1,
790 co_list, head_p, tail_p);
791 }
792 else
793 {
794 while ((*l != '\0') && ITEM_SEP(*l))
795 l++;
796 }
797 if (*l == '\0') break; /* done */
798 }
799
800 return(retval);
801 }
802
STACK_OF(SSL_CIPHER)803 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
804 STACK_OF(SSL_CIPHER) **cipher_list,
805 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
806 const char *rule_str)
807 {
808 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
809 unsigned long disabled_mask;
810 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
811 const char *rule_p;
812 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
813 SSL_CIPHER **ca_list = NULL;
814
815 /*
816 * Return with error if nothing to do.
817 */
818 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
819 return NULL;
820
821 /*
822 * To reduce the work to do we only want to process the compiled
823 * in algorithms, so we first get the mask of disabled ciphers.
824 */
825 disabled_mask = ssl_cipher_get_disabled();
826
827 /*
828 * Now we have to collect the available ciphers from the compiled
829 * in ciphers. We cannot get more than the number compiled in, so
830 * it is used for allocation.
831 */
832 num_of_ciphers = ssl_method->num_ciphers();
833 #ifdef KSSL_DEBUG
834 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
835 #endif /* KSSL_DEBUG */
836 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
837 if (co_list == NULL)
838 {
839 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
840 return(NULL); /* Failure */
841 }
842
843 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
844 co_list, &head, &tail);
845
846 /*
847 * We also need cipher aliases for selecting based on the rule_str.
848 * There might be two types of entries in the rule_str: 1) names
849 * of ciphers themselves 2) aliases for groups of ciphers.
850 * For 1) we need the available ciphers and for 2) the cipher
851 * groups of cipher_aliases added together in one list (otherwise
852 * we would be happy with just the cipher_aliases table).
853 */
854 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
855 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
856 ca_list =
857 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
858 if (ca_list == NULL)
859 {
860 OPENSSL_free(co_list);
861 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
862 return(NULL); /* Failure */
863 }
864 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
865 head);
866
867 /*
868 * If the rule_string begins with DEFAULT, apply the default rule
869 * before using the (possibly available) additional rules.
870 */
871 ok = 1;
872 rule_p = rule_str;
873 if (strncmp(rule_str,"DEFAULT",7) == 0)
874 {
875 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
876 co_list, &head, &tail, ca_list);
877 rule_p += 7;
878 if (*rule_p == ':')
879 rule_p++;
880 }
881
882 if (ok && (strlen(rule_p) > 0))
883 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
884 ca_list);
885
886 OPENSSL_free(ca_list); /* Not needed anymore */
887
888 if (!ok)
889 { /* Rule processing failure */
890 OPENSSL_free(co_list);
891 return(NULL);
892 }
893 /*
894 * Allocate new "cipherstack" for the result, return with error
895 * if we cannot get one.
896 */
897 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
898 {
899 OPENSSL_free(co_list);
900 return(NULL);
901 }
902
903 /*
904 * The cipher selection for the list is done. The ciphers are added
905 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
906 */
907 for (curr = head; curr != NULL; curr = curr->next)
908 {
909 if (curr->active)
910 {
911 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
912 #ifdef CIPHER_DEBUG
913 printf("<%s>\n",curr->cipher->name);
914 #endif
915 }
916 }
917 OPENSSL_free(co_list); /* Not needed any longer */
918
919 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
920 if (tmp_cipher_list == NULL)
921 {
922 sk_SSL_CIPHER_free(cipherstack);
923 return NULL;
924 }
925 if (*cipher_list != NULL)
926 sk_SSL_CIPHER_free(*cipher_list);
927 *cipher_list = cipherstack;
928 if (*cipher_list_by_id != NULL)
929 sk_SSL_CIPHER_free(*cipher_list_by_id);
930 *cipher_list_by_id = tmp_cipher_list;
931 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
932
933 return(cipherstack);
934 }
935
SSL_CIPHER_description(SSL_CIPHER * cipher,char * buf,int len)936 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
937 {
938 int is_export,pkl,kl;
939 const char *ver,*exp_str;
940 const char *kx,*au,*enc,*mac;
941 unsigned long alg,alg2,alg_s;
942 #ifdef KSSL_DEBUG
943 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
944 #else
945 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
946 #endif /* KSSL_DEBUG */
947
948 alg=cipher->algorithms;
949 alg_s=cipher->algo_strength;
950 alg2=cipher->algorithm2;
951
952 is_export=SSL_C_IS_EXPORT(cipher);
953 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
954 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
955 exp_str=is_export?" export":"";
956
957 if (alg & SSL_SSLV2)
958 ver="SSLv2";
959 else if (alg & SSL_SSLV3)
960 ver="SSLv3";
961 else
962 ver="unknown";
963
964 switch (alg&SSL_MKEY_MASK)
965 {
966 case SSL_kRSA:
967 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
968 break;
969 case SSL_kDHr:
970 kx="DH/RSA";
971 break;
972 case SSL_kDHd:
973 kx="DH/DSS";
974 break;
975 case SSL_kKRB5: /* VRS */
976 case SSL_KRB5: /* VRS */
977 kx="KRB5";
978 break;
979 case SSL_kFZA:
980 kx="Fortezza";
981 break;
982 case SSL_kEDH:
983 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
984 break;
985 case SSL_kECDH:
986 case SSL_kECDHE:
987 kx=is_export?"ECDH(<=163)":"ECDH";
988 break;
989 default:
990 kx="unknown";
991 }
992
993 switch (alg&SSL_AUTH_MASK)
994 {
995 case SSL_aRSA:
996 au="RSA";
997 break;
998 case SSL_aDSS:
999 au="DSS";
1000 break;
1001 case SSL_aDH:
1002 au="DH";
1003 break;
1004 case SSL_aKRB5: /* VRS */
1005 case SSL_KRB5: /* VRS */
1006 au="KRB5";
1007 break;
1008 case SSL_aFZA:
1009 case SSL_aNULL:
1010 au="None";
1011 break;
1012 case SSL_aECDSA:
1013 au="ECDSA";
1014 break;
1015 default:
1016 au="unknown";
1017 break;
1018 }
1019
1020 switch (alg&SSL_ENC_MASK)
1021 {
1022 case SSL_DES:
1023 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1024 break;
1025 case SSL_3DES:
1026 enc="3DES(168)";
1027 break;
1028 case SSL_RC4:
1029 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1030 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1031 break;
1032 case SSL_RC2:
1033 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1034 break;
1035 case SSL_IDEA:
1036 enc="IDEA(128)";
1037 break;
1038 case SSL_eFZA:
1039 enc="Fortezza";
1040 break;
1041 case SSL_eNULL:
1042 enc="None";
1043 break;
1044 case SSL_AES:
1045 switch(cipher->strength_bits)
1046 {
1047 case 128: enc="AES(128)"; break;
1048 case 192: enc="AES(192)"; break;
1049 case 256: enc="AES(256)"; break;
1050 default: enc="AES(?""?""?)"; break;
1051 }
1052 break;
1053 default:
1054 enc="unknown";
1055 break;
1056 }
1057
1058 switch (alg&SSL_MAC_MASK)
1059 {
1060 case SSL_MD5:
1061 mac="MD5";
1062 break;
1063 case SSL_SHA1:
1064 mac="SHA1";
1065 break;
1066 default:
1067 mac="unknown";
1068 break;
1069 }
1070
1071 if (buf == NULL)
1072 {
1073 len=128;
1074 buf=OPENSSL_malloc(len);
1075 if (buf == NULL) return("OPENSSL_malloc Error");
1076 }
1077 else if (len < 128)
1078 return("Buffer too small");
1079
1080 #ifdef KSSL_DEBUG
1081 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1082 #else
1083 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1084 #endif /* KSSL_DEBUG */
1085 return(buf);
1086 }
1087
SSL_CIPHER_get_version(const SSL_CIPHER * c)1088 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1089 {
1090 int i;
1091
1092 if (c == NULL) return("(NONE)");
1093 i=(int)(c->id>>24L);
1094 if (i == 3)
1095 return("TLSv1/SSLv3");
1096 else if (i == 2)
1097 return("SSLv2");
1098 else
1099 return("unknown");
1100 }
1101
1102 /* return the actual cipher being used */
SSL_CIPHER_get_name(const SSL_CIPHER * c)1103 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1104 {
1105 if (c != NULL)
1106 return(c->name);
1107 return("(NONE)");
1108 }
1109
1110 /* number of bits for symmetric cipher */
SSL_CIPHER_get_bits(const SSL_CIPHER * c,int * alg_bits)1111 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1112 {
1113 int ret=0;
1114
1115 if (c != NULL)
1116 {
1117 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1118 ret = c->strength_bits;
1119 }
1120 return(ret);
1121 }
1122
ssl3_comp_find(STACK_OF (SSL_COMP)* sk,int n)1123 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1124 {
1125 SSL_COMP *ctmp;
1126 int i,nn;
1127
1128 if ((n == 0) || (sk == NULL)) return(NULL);
1129 nn=sk_SSL_COMP_num(sk);
1130 for (i=0; i<nn; i++)
1131 {
1132 ctmp=sk_SSL_COMP_value(sk,i);
1133 if (ctmp->id == n)
1134 return(ctmp);
1135 }
1136 return(NULL);
1137 }
1138
1139 #ifdef OPENSSL_NO_COMP
SSL_COMP_get_compression_methods(void)1140 void *SSL_COMP_get_compression_methods(void)
1141 {
1142 return NULL;
1143 }
SSL_COMP_add_compression_method(int id,void * cm)1144 int SSL_COMP_add_compression_method(int id, void *cm)
1145 {
1146 return 1;
1147 }
1148
SSL_COMP_get_name(const void * comp)1149 const char *SSL_COMP_get_name(const void *comp)
1150 {
1151 return NULL;
1152 }
1153 #else
STACK_OF(SSL_COMP)1154 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1155 {
1156 load_builtin_compressions();
1157 return(ssl_comp_methods);
1158 }
1159
SSL_COMP_add_compression_method(int id,COMP_METHOD * cm)1160 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1161 {
1162 SSL_COMP *comp;
1163
1164 if (cm == NULL || cm->type == NID_undef)
1165 return 1;
1166
1167 /* According to draft-ietf-tls-compression-04.txt, the
1168 compression number ranges should be the following:
1169
1170 0 to 63: methods defined by the IETF
1171 64 to 192: external party methods assigned by IANA
1172 193 to 255: reserved for private use */
1173 if (id < 193 || id > 255)
1174 {
1175 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1176 return 0;
1177 }
1178
1179 MemCheck_off();
1180 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1181 comp->id=id;
1182 comp->method=cm;
1183 load_builtin_compressions();
1184 if (ssl_comp_methods
1185 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1186 {
1187 OPENSSL_free(comp);
1188 MemCheck_on();
1189 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1190 return(1);
1191 }
1192 else if ((ssl_comp_methods == NULL)
1193 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1194 {
1195 OPENSSL_free(comp);
1196 MemCheck_on();
1197 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1198 return(1);
1199 }
1200 else
1201 {
1202 MemCheck_on();
1203 return(0);
1204 }
1205 }
1206
SSL_COMP_get_name(const COMP_METHOD * comp)1207 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1208 {
1209 if (comp)
1210 return comp->name;
1211 return NULL;
1212 }
1213
1214 #endif
1215