Avoid some shadowed variable names.
[openssl.git] / ssl / ssl_ciph.c
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         {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},
142
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},
146
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},
152
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},
156
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},
164         };
165
166 static int init_ciphers=1;
167
168 static void load_ciphers(void)
169         {
170         init_ciphers=0;
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);
185
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);
190         }
191
192 static int sk_comp_cmp(const SSL_COMP * const *a,
193                         const SSL_COMP * const *b)
194         {
195         return((*a)->id-(*b)->id);
196         }
197
198 static void load_builtin_compressions(void)
199         {
200         if (ssl_comp_methods != NULL)
201                 return;
202
203         CRYPTO_w_lock(CRYPTO_LOCK_SSL);
204         if (ssl_comp_methods == NULL)
205                 {
206                 SSL_COMP *comp = NULL;
207
208                 MemCheck_off();
209                 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
210                 if (ssl_comp_methods != NULL)
211                         {
212                         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
213                         if (comp != NULL)
214                                 {
215                                 comp->method=COMP_zlib();
216                                 if (comp->method
217                                         && comp->method->type == NID_undef)
218                                         OPENSSL_free(comp);
219                                 else
220                                         {
221                                         comp->id=SSL_COMP_ZLIB_IDX;
222                                         comp->name=comp->method->name;
223                                         sk_SSL_COMP_push(ssl_comp_methods,comp);
224                                         }
225                                 }
226                         }
227                 MemCheck_on();
228                 }
229         CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
230         }
231
232 int ssl_cipher_get_evp(SSL_SESSION *s, const EVP_CIPHER **enc,
233              const EVP_MD **md, SSL_COMP **comp)
234         {
235         int i;
236         SSL_CIPHER *c;
237
238         c=s->cipher;
239         if (c == NULL) return(0);
240         if (comp != NULL)
241                 {
242                 SSL_COMP ctmp;
243
244                 load_builtin_compressions();
245
246                 *comp=NULL;
247                 ctmp.id=s->compress_meth;
248                 if (ssl_comp_methods != NULL)
249                         {
250                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
251                         if (i >= 0)
252                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
253                         else
254                                 *comp=NULL;
255                         }
256                 }
257
258         if ((enc == NULL) || (md == NULL)) return(0);
259
260         switch (c->algorithms & SSL_ENC_MASK)
261                 {
262         case SSL_DES:
263                 i=SSL_ENC_DES_IDX;
264                 break;
265         case SSL_3DES:
266                 i=SSL_ENC_3DES_IDX;
267                 break;
268         case SSL_RC4:
269                 i=SSL_ENC_RC4_IDX;
270                 break;
271         case SSL_RC2:
272                 i=SSL_ENC_RC2_IDX;
273                 break;
274         case SSL_IDEA:
275                 i=SSL_ENC_IDEA_IDX;
276                 break;
277         case SSL_eNULL:
278                 i=SSL_ENC_NULL_IDX;
279                 break;
280         case SSL_AES:
281                 switch(c->alg_bits)
282                         {
283                 case 128: i=SSL_ENC_AES128_IDX; break;
284                 case 256: i=SSL_ENC_AES256_IDX; break;
285                 default: i=-1; break;
286                         }
287                 break;
288         default:
289                 i= -1;
290                 break;
291                 }
292
293         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
294                 *enc=NULL;
295         else
296                 {
297                 if (i == SSL_ENC_NULL_IDX)
298                         *enc=EVP_enc_null();
299                 else
300                         *enc=ssl_cipher_methods[i];
301                 }
302
303         switch (c->algorithms & SSL_MAC_MASK)
304                 {
305         case SSL_MD5:
306                 i=SSL_MD_MD5_IDX;
307                 break;
308         case SSL_SHA1:
309                 i=SSL_MD_SHA1_IDX;
310                 break;
311         default:
312                 i= -1;
313                 break;
314                 }
315         if ((i < 0) || (i > SSL_MD_NUM_IDX))
316                 *md=NULL;
317         else
318                 *md=ssl_digest_methods[i];
319
320         if ((*enc != NULL) && (*md != NULL))
321                 return(1);
322         else
323                 return(0);
324         }
325
326 #define ITEM_SEP(a) \
327         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
328
329 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
330              CIPHER_ORDER **tail)
331         {
332         if (curr == *tail) return;
333         if (curr == *head)
334                 *head=curr->next;
335         if (curr->prev != NULL)
336                 curr->prev->next=curr->next;
337         if (curr->next != NULL) /* should always be true */
338                 curr->next->prev=curr->prev;
339         (*tail)->next=curr;
340         curr->prev= *tail;
341         curr->next=NULL;
342         *tail=curr;
343         }
344
345 static unsigned long ssl_cipher_get_disabled(void)
346         {
347         unsigned long mask;
348
349         mask = SSL_kFZA;
350 #ifdef OPENSSL_NO_RSA
351         mask |= SSL_aRSA|SSL_kRSA;
352 #endif
353 #ifdef OPENSSL_NO_DSA
354         mask |= SSL_aDSS;
355 #endif
356 #ifdef OPENSSL_NO_DH
357         mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
358 #endif
359 #ifdef OPENSSL_NO_KRB5
360         mask |= SSL_kKRB5|SSL_aKRB5;
361 #endif
362 #ifdef OPENSSL_NO_ECDH
363         mask |= SSL_kECDH|SSL_kECDHE;
364 #endif
365 #ifdef SSL_FORBID_ENULL
366         mask |= SSL_eNULL;
367 #endif
368
369         mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
370         mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
371         mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
372         mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
373         mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
374         mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
375         mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
376
377         mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
378         mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
379
380         return(mask);
381         }
382
383 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
384                 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *list,
385                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
386         {
387         int i, list_num;
388         SSL_CIPHER *c;
389
390         /*
391          * We have num_of_ciphers descriptions compiled in, depending on the
392          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
393          * These will later be sorted in a linked list with at most num
394          * entries.
395          */
396
397         /* Get the initial list of ciphers */
398         list_num = 0;   /* actual count of ciphers */
399         for (i = 0; i < num_of_ciphers; i++)
400                 {
401                 c = ssl_method->get_cipher(i);
402                 /* drop those that use any of that is not available */
403                 if ((c != NULL) && c->valid && !(c->algorithms & mask))
404                         {
405                         list[list_num].cipher = c;
406                         list[list_num].next = NULL;
407                         list[list_num].prev = NULL;
408                         list[list_num].active = 0;
409                         list_num++;
410 #ifdef KSSL_DEBUG
411                         printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
412 #endif  /* KSSL_DEBUG */
413                         /*
414                         if (!sk_push(ca_list,(char *)c)) goto err;
415                         */
416                         }
417                 }
418
419         /*
420          * Prepare linked list from list entries
421          */     
422         for (i = 1; i < list_num - 1; i++)
423                 {
424                 list[i].prev = &(list[i-1]);
425                 list[i].next = &(list[i+1]);
426                 }
427         if (list_num > 0)
428                 {
429                 (*head_p) = &(list[0]);
430                 (*head_p)->prev = NULL;
431                 (*head_p)->next = &(list[1]);
432                 (*tail_p) = &(list[list_num - 1]);
433                 (*tail_p)->prev = &(list[list_num - 2]);
434                 (*tail_p)->next = NULL;
435                 }
436         }
437
438 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
439                         int num_of_group_aliases, unsigned long mask,
440                         CIPHER_ORDER *head)
441         {
442         CIPHER_ORDER *ciph_curr;
443         SSL_CIPHER **ca_curr;
444         int i;
445
446         /*
447          * First, add the real ciphers as already collected
448          */
449         ciph_curr = head;
450         ca_curr = ca_list;
451         while (ciph_curr != NULL)
452                 {
453                 *ca_curr = ciph_curr->cipher;
454                 ca_curr++;
455                 ciph_curr = ciph_curr->next;
456                 }
457
458         /*
459          * Now we add the available ones from the cipher_aliases[] table.
460          * They represent either an algorithm, that must be fully
461          * supported (not match any bit in mask) or represent a cipher
462          * strength value (will be added in any case because algorithms=0).
463          */
464         for (i = 0; i < num_of_group_aliases; i++)
465                 {
466                 if ((i == 0) ||         /* always fetch "ALL" */
467                     !(cipher_aliases[i].algorithms & mask))
468                         {
469                         *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
470                         ca_curr++;
471                         }
472                 }
473
474         *ca_curr = NULL;        /* end of list */
475         }
476
477 static void ssl_cipher_apply_rule(unsigned long algorithms, unsigned long mask,
478                 unsigned long algo_strength, unsigned long mask_strength,
479                 int rule, int strength_bits, CIPHER_ORDER *list,
480                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
481         {
482         CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
483         SSL_CIPHER *cp;
484         unsigned long ma, ma_s;
485
486 #ifdef CIPHER_DEBUG
487         printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
488                 rule, algorithms, mask, algo_strength, mask_strength,
489                 strength_bits);
490 #endif
491
492         curr = head = *head_p;
493         curr2 = head;
494         tail2 = tail = *tail_p;
495         for (;;)
496                 {
497                 if ((curr == NULL) || (curr == tail2)) break;
498                 curr = curr2;
499                 curr2 = curr->next;
500
501                 cp = curr->cipher;
502
503                 /*
504                  * Selection criteria is either the number of strength_bits
505                  * or the algorithm used.
506                  */
507                 if (strength_bits == -1)
508                         {
509                         ma = mask & cp->algorithms;
510                         ma_s = mask_strength & cp->algo_strength;
511
512 #ifdef CIPHER_DEBUG
513                         printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
514                         printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
515 #endif
516                         /*
517                          * Select: if none of the mask bit was met from the
518                          * cipher or not all of the bits were met, the
519                          * selection does not apply.
520                          */
521                         if (((ma == 0) && (ma_s == 0)) ||
522                             ((ma & algorithms) != ma) ||
523                             ((ma_s & algo_strength) != ma_s))
524                                 continue; /* does not apply */
525                         }
526                 else if (strength_bits != cp->strength_bits)
527                         continue;       /* does not apply */
528
529 #ifdef CIPHER_DEBUG
530                 printf("Action = %d\n", rule);
531 #endif
532
533                 /* add the cipher if it has not been added yet. */
534                 if (rule == CIPHER_ADD)
535                         {
536                         if (!curr->active)
537                                 {
538                                 ll_append_tail(&head, curr, &tail);
539                                 curr->active = 1;
540                                 }
541                         }
542                 /* Move the added cipher to this location */
543                 else if (rule == CIPHER_ORD)
544                         {
545                         if (curr->active)
546                                 {
547                                 ll_append_tail(&head, curr, &tail);
548                                 }
549                         }
550                 else if (rule == CIPHER_DEL)
551                         curr->active = 0;
552                 else if (rule == CIPHER_KILL)
553                         {
554                         if (head == curr)
555                                 head = curr->next;
556                         else
557                                 curr->prev->next = curr->next;
558                         if (tail == curr)
559                                 tail = curr->prev;
560                         curr->active = 0;
561                         if (curr->next != NULL)
562                                 curr->next->prev = curr->prev;
563                         if (curr->prev != NULL)
564                                 curr->prev->next = curr->next;
565                         curr->next = NULL;
566                         curr->prev = NULL;
567                         }
568                 }
569
570         *head_p = head;
571         *tail_p = tail;
572         }
573
574 static int ssl_cipher_strength_sort(CIPHER_ORDER *list, CIPHER_ORDER **head_p,
575                                      CIPHER_ORDER **tail_p)
576         {
577         int max_strength_bits, i, *number_uses;
578         CIPHER_ORDER *curr;
579
580         /*
581          * This routine sorts the ciphers with descending strength. The sorting
582          * must keep the pre-sorted sequence, so we apply the normal sorting
583          * routine as '+' movement to the end of the list.
584          */
585         max_strength_bits = 0;
586         curr = *head_p;
587         while (curr != NULL)
588                 {
589                 if (curr->active &&
590                     (curr->cipher->strength_bits > max_strength_bits))
591                     max_strength_bits = curr->cipher->strength_bits;
592                 curr = curr->next;
593                 }
594
595         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
596         if (!number_uses)
597         {
598                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
599                 return(0);
600         }
601         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
602
603         /*
604          * Now find the strength_bits values actually used
605          */
606         curr = *head_p;
607         while (curr != NULL)
608                 {
609                 if (curr->active)
610                         number_uses[curr->cipher->strength_bits]++;
611                 curr = curr->next;
612                 }
613         /*
614          * Go through the list of used strength_bits values in descending
615          * order.
616          */
617         for (i = max_strength_bits; i >= 0; i--)
618                 if (number_uses[i] > 0)
619                         ssl_cipher_apply_rule(0, 0, 0, 0, CIPHER_ORD, i,
620                                         list, head_p, tail_p);
621
622         OPENSSL_free(number_uses);
623         return(1);
624         }
625
626 static int ssl_cipher_process_rulestr(const char *rule_str,
627                 CIPHER_ORDER *list, CIPHER_ORDER **head_p,
628                 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
629         {
630         unsigned long algorithms, mask, algo_strength, mask_strength;
631         const char *l, *start, *buf;
632         int j, multi, found, rule, retval, ok, buflen;
633         char ch;
634
635         retval = 1;
636         l = rule_str;
637         for (;;)
638                 {
639                 ch = *l;
640
641                 if (ch == '\0')
642                         break;          /* done */
643                 if (ch == '-')
644                         { rule = CIPHER_DEL; l++; }
645                 else if (ch == '+')
646                         { rule = CIPHER_ORD; l++; }
647                 else if (ch == '!')
648                         { rule = CIPHER_KILL; l++; }
649                 else if (ch == '@')
650                         { rule = CIPHER_SPECIAL; l++; }
651                 else
652                         { rule = CIPHER_ADD; }
653
654                 if (ITEM_SEP(ch))
655                         {
656                         l++;
657                         continue;
658                         }
659
660                 algorithms = mask = algo_strength = mask_strength = 0;
661
662                 start=l;
663                 for (;;)
664                         {
665                         ch = *l;
666                         buf = l;
667                         buflen = 0;
668 #ifndef CHARSET_EBCDIC
669                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
670                                 ((ch >= '0') && (ch <= '9')) ||
671                                 ((ch >= 'a') && (ch <= 'z')) ||
672                                  (ch == '-'))
673 #else
674                         while ( isalnum(ch) || (ch == '-'))
675 #endif
676                                  {
677                                  ch = *(++l);
678                                  buflen++;
679                                  }
680
681                         if (buflen == 0)
682                                 {
683                                 /*
684                                  * We hit something we cannot deal with,
685                                  * it is no command or separator nor
686                                  * alphanumeric, so we call this an error.
687                                  */
688                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
689                                        SSL_R_INVALID_COMMAND);
690                                 retval = found = 0;
691                                 l++;
692                                 break;
693                                 }
694
695                         if (rule == CIPHER_SPECIAL)
696                                 {
697                                 found = 0; /* unused -- avoid compiler warning */
698                                 break;  /* special treatment */
699                                 }
700
701                         /* check for multi-part specification */
702                         if (ch == '+')
703                                 {
704                                 multi=1;
705                                 l++;
706                                 }
707                         else
708                                 multi=0;
709
710                         /*
711                          * Now search for the cipher alias in the ca_list. Be careful
712                          * with the strncmp, because the "buflen" limitation
713                          * will make the rule "ADH:SOME" and the cipher
714                          * "ADH-MY-CIPHER" look like a match for buflen=3.
715                          * So additionally check whether the cipher name found
716                          * has the correct length. We can save a strlen() call:
717                          * just checking for the '\0' at the right place is
718                          * sufficient, we have to strncmp() anyway. (We cannot
719                          * use strcmp(), because buf is not '\0' terminated.)
720                          */
721                          j = found = 0;
722                          while (ca_list[j])
723                                 {
724                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
725                                     (ca_list[j]->name[buflen] == '\0'))
726                                         {
727                                         found = 1;
728                                         break;
729                                         }
730                                 else
731                                         j++;
732                                 }
733                         if (!found)
734                                 break;  /* ignore this entry */
735
736                         algorithms |= ca_list[j]->algorithms;
737                         mask |= ca_list[j]->mask;
738                         algo_strength |= ca_list[j]->algo_strength;
739                         mask_strength |= ca_list[j]->mask_strength;
740
741                         if (!multi) break;
742                         }
743
744                 /*
745                  * Ok, we have the rule, now apply it
746                  */
747                 if (rule == CIPHER_SPECIAL)
748                         {       /* special command */
749                         ok = 0;
750                         if ((buflen == 8) &&
751                                 !strncmp(buf, "STRENGTH", 8))
752                                 ok = ssl_cipher_strength_sort(list,
753                                         head_p, tail_p);
754                         else
755                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
756                                         SSL_R_INVALID_COMMAND);
757                         if (ok == 0)
758                                 retval = 0;
759                         /*
760                          * We do not support any "multi" options
761                          * together with "@", so throw away the
762                          * rest of the command, if any left, until
763                          * end or ':' is found.
764                          */
765                         while ((*l != '\0') && ITEM_SEP(*l))
766                                 l++;
767                         }
768                 else if (found)
769                         {
770                         ssl_cipher_apply_rule(algorithms, mask,
771                                 algo_strength, mask_strength, rule, -1,
772                                 list, head_p, tail_p);
773                         }
774                 else
775                         {
776                         while ((*l != '\0') && ITEM_SEP(*l))
777                                 l++;
778                         }
779                 if (*l == '\0') break; /* done */
780                 }
781
782         return(retval);
783         }
784
785 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
786                 STACK_OF(SSL_CIPHER) **cipher_list,
787                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
788                 const char *rule_str)
789         {
790         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
791         unsigned long disabled_mask;
792         STACK_OF(SSL_CIPHER) *cipherstack;
793         const char *rule_p;
794         CIPHER_ORDER *list = NULL, *head = NULL, *tail = NULL, *curr;
795         SSL_CIPHER **ca_list = NULL;
796
797         /*
798          * Return with error if nothing to do.
799          */
800         if (rule_str == NULL) return(NULL);
801
802         if (init_ciphers)
803                 {
804                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
805                 if (init_ciphers) load_ciphers();
806                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
807                 }
808
809         /*
810          * To reduce the work to do we only want to process the compiled
811          * in algorithms, so we first get the mask of disabled ciphers.
812          */
813         disabled_mask = ssl_cipher_get_disabled();
814
815         /*
816          * Now we have to collect the available ciphers from the compiled
817          * in ciphers. We cannot get more than the number compiled in, so
818          * it is used for allocation.
819          */
820         num_of_ciphers = ssl_method->num_ciphers();
821 #ifdef KSSL_DEBUG
822         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
823 #endif    /* KSSL_DEBUG */
824         list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
825         if (list == NULL)
826                 {
827                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
828                 return(NULL);   /* Failure */
829                 }
830
831         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
832                                    list, &head, &tail);
833
834         /*
835          * We also need cipher aliases for selecting based on the rule_str.
836          * There might be two types of entries in the rule_str: 1) names
837          * of ciphers themselves 2) aliases for groups of ciphers.
838          * For 1) we need the available ciphers and for 2) the cipher
839          * groups of cipher_aliases added together in one list (otherwise
840          * we would be happy with just the cipher_aliases table).
841          */
842         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
843         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
844         ca_list =
845                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
846         if (ca_list == NULL)
847                 {
848                 OPENSSL_free(list);
849                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
850                 return(NULL);   /* Failure */
851                 }
852         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
853                                    head);
854
855         /*
856          * If the rule_string begins with DEFAULT, apply the default rule
857          * before using the (possibly available) additional rules.
858          */
859         ok = 1;
860         rule_p = rule_str;
861         if (strncmp(rule_str,"DEFAULT",7) == 0)
862                 {
863                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
864                         list, &head, &tail, ca_list);
865                 rule_p += 7;
866                 if (*rule_p == ':')
867                         rule_p++;
868                 }
869
870         if (ok && (strlen(rule_p) > 0))
871                 ok = ssl_cipher_process_rulestr(rule_p, list, &head, &tail,
872                                                 ca_list);
873
874         OPENSSL_free(ca_list);  /* Not needed anymore */
875
876         if (!ok)
877                 {       /* Rule processing failure */
878                 OPENSSL_free(list);
879                 return(NULL);
880                 }
881         /*
882          * Allocate new "cipherstack" for the result, return with error
883          * if we cannot get one.
884          */
885         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
886                 {
887                 OPENSSL_free(list);
888                 return(NULL);
889                 }
890
891         /*
892          * The cipher selection for the list is done. The ciphers are added
893          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
894          */
895         for (curr = head; curr != NULL; curr = curr->next)
896                 {
897                 if (curr->active)
898                         {
899                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
900 #ifdef CIPHER_DEBUG
901                         printf("<%s>\n",curr->cipher->name);
902 #endif
903                         }
904                 }
905         OPENSSL_free(list);     /* Not needed any longer */
906
907         /*
908          * The following passage is a little bit odd. If pointer variables
909          * were supplied to hold STACK_OF(SSL_CIPHER) return information,
910          * the old memory pointed to is free()ed. Then, however, the
911          * cipher_list entry will be assigned just a copy of the returned
912          * cipher stack. For cipher_list_by_id a copy of the cipher stack
913          * will be created. See next comment...
914          */
915         if (cipher_list != NULL)
916                 {
917                 if (*cipher_list != NULL)
918                         sk_SSL_CIPHER_free(*cipher_list);
919                 *cipher_list = cipherstack;
920                 }
921
922         if (cipher_list_by_id != NULL)
923                 {
924                 if (*cipher_list_by_id != NULL)
925                         sk_SSL_CIPHER_free(*cipher_list_by_id);
926                 *cipher_list_by_id = sk_SSL_CIPHER_dup(cipherstack);
927                 }
928
929         /*
930          * Now it is getting really strange. If something failed during
931          * the previous pointer assignment or if one of the pointers was
932          * not requested, the error condition is met. That might be
933          * discussable. The strange thing is however that in this case
934          * the memory "ret" pointed to is "free()ed" and hence the pointer
935          * cipher_list becomes wild. The memory reserved for
936          * cipher_list_by_id however is not "free()ed" and stays intact.
937          */
938         if (    (cipher_list_by_id == NULL) ||
939                 (*cipher_list_by_id == NULL) ||
940                 (cipher_list == NULL) ||
941                 (*cipher_list == NULL))
942                 {
943                 sk_SSL_CIPHER_free(cipherstack);
944                 return(NULL);
945                 }
946
947         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
948
949         return(cipherstack);
950         }
951
952 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
953         {
954         int is_export,pkl,kl;
955         char *ver,*exp_str;
956         char *kx,*au,*enc,*mac;
957         unsigned long alg,alg2,alg_s;
958 #ifdef KSSL_DEBUG
959         static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
960 #else
961         static char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
962 #endif /* KSSL_DEBUG */
963
964         alg=cipher->algorithms;
965         alg_s=cipher->algo_strength;
966         alg2=cipher->algorithm2;
967
968         is_export=SSL_C_IS_EXPORT(cipher);
969         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
970         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
971         exp_str=is_export?" export":"";
972         
973         if (alg & SSL_SSLV2)
974                 ver="SSLv2";
975         else if (alg & SSL_SSLV3)
976                 ver="SSLv3";
977         else
978                 ver="unknown";
979
980         switch (alg&SSL_MKEY_MASK)
981                 {
982         case SSL_kRSA:
983                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
984                 break;
985         case SSL_kDHr:
986                 kx="DH/RSA";
987                 break;
988         case SSL_kDHd:
989                 kx="DH/DSS";
990                 break;
991         case SSL_kKRB5:         /* VRS */
992         case SSL_KRB5:          /* VRS */
993             kx="KRB5";
994             break;
995         case SSL_kFZA:
996                 kx="Fortezza";
997                 break;
998         case SSL_kEDH:
999                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1000                 break;
1001         case SSL_kECDH:
1002         case SSL_kECDHE:
1003                 kx=is_export?"ECDH(<=163)":"ECDH";
1004                 break;
1005         default:
1006                 kx="unknown";
1007                 }
1008
1009         switch (alg&SSL_AUTH_MASK)
1010                 {
1011         case SSL_aRSA:
1012                 au="RSA";
1013                 break;
1014         case SSL_aDSS:
1015                 au="DSS";
1016                 break;
1017         case SSL_aDH:
1018                 au="DH";
1019                 break;
1020         case SSL_aKRB5:         /* VRS */
1021         case SSL_KRB5:          /* VRS */
1022             au="KRB5";
1023             break;
1024         case SSL_aFZA:
1025         case SSL_aNULL:
1026                 au="None";
1027                 break;
1028         case SSL_aECDSA:
1029                 au="ECDSA";
1030                 break;
1031         default:
1032                 au="unknown";
1033                 break;
1034                 }
1035
1036         switch (alg&SSL_ENC_MASK)
1037                 {
1038         case SSL_DES:
1039                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1040                 break;
1041         case SSL_3DES:
1042                 enc="3DES(168)";
1043                 break;
1044         case SSL_RC4:
1045                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1046                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1047                 break;
1048         case SSL_RC2:
1049                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1050                 break;
1051         case SSL_IDEA:
1052                 enc="IDEA(128)";
1053                 break;
1054         case SSL_eFZA:
1055                 enc="Fortezza";
1056                 break;
1057         case SSL_eNULL:
1058                 enc="None";
1059                 break;
1060         case SSL_AES:
1061                 switch(cipher->strength_bits)
1062                         {
1063                 case 128: enc="AES(128)"; break;
1064                 case 192: enc="AES(192)"; break;
1065                 case 256: enc="AES(256)"; break;
1066                 default: enc="AES(?""?""?)"; break;
1067                         }
1068                 break;
1069         default:
1070                 enc="unknown";
1071                 break;
1072                 }
1073
1074         switch (alg&SSL_MAC_MASK)
1075                 {
1076         case SSL_MD5:
1077                 mac="MD5";
1078                 break;
1079         case SSL_SHA1:
1080                 mac="SHA1";
1081                 break;
1082         default:
1083                 mac="unknown";
1084                 break;
1085                 }
1086
1087         if (buf == NULL)
1088                 {
1089                 len=128;
1090                 buf=OPENSSL_malloc(len);
1091                 if (buf == NULL) return("OPENSSL_malloc Error");
1092                 }
1093         else if (len < 128)
1094                 return("Buffer too small");
1095
1096 #ifdef KSSL_DEBUG
1097         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1098 #else
1099         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1100 #endif /* KSSL_DEBUG */
1101         return(buf);
1102         }
1103
1104 char *SSL_CIPHER_get_version(SSL_CIPHER *c)
1105         {
1106         int i;
1107
1108         if (c == NULL) return("(NONE)");
1109         i=(int)(c->id>>24L);
1110         if (i == 3)
1111                 return("TLSv1/SSLv3");
1112         else if (i == 2)
1113                 return("SSLv2");
1114         else
1115                 return("unknown");
1116         }
1117
1118 /* return the actual cipher being used */
1119 const char *SSL_CIPHER_get_name(SSL_CIPHER *c)
1120         {
1121         if (c != NULL)
1122                 return(c->name);
1123         return("(NONE)");
1124         }
1125
1126 /* number of bits for symmetric cipher */
1127 int SSL_CIPHER_get_bits(SSL_CIPHER *c, int *alg_bits)
1128         {
1129         int ret=0;
1130
1131         if (c != NULL)
1132                 {
1133                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1134                 ret = c->strength_bits;
1135                 }
1136         return(ret);
1137         }
1138
1139 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1140         {
1141         SSL_COMP *ctmp;
1142         int i,nn;
1143
1144         if ((n == 0) || (sk == NULL)) return(NULL);
1145         nn=sk_SSL_COMP_num(sk);
1146         for (i=0; i<nn; i++)
1147                 {
1148                 ctmp=sk_SSL_COMP_value(sk,i);
1149                 if (ctmp->id == n)
1150                         return(ctmp);
1151                 }
1152         return(NULL);
1153         }
1154
1155 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1156         {
1157         load_builtin_compressions();
1158         return(ssl_comp_methods);
1159         }
1160
1161 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1162         {
1163         SSL_COMP *comp;
1164
1165         if (cm == NULL || cm->type == NID_undef)
1166                 return 1;
1167
1168         /* According to draft-ietf-tls-compression-04.txt, the
1169            compression number ranges should be the following:
1170
1171            0 to 63:    methods defined by the IETF
1172            64 to 192:  external party methods assigned by IANA
1173            193 to 255: reserved for private use */
1174         if (id < 193 || id > 255)
1175                 {
1176                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1177                 return 0;
1178                 }
1179
1180         MemCheck_off();
1181         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1182         comp->id=id;
1183         comp->method=cm;
1184         load_builtin_compressions();
1185         if (ssl_comp_methods
1186                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1187                 {
1188                 OPENSSL_free(comp);
1189                 MemCheck_on();
1190                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1191                 return(1);
1192                 }
1193         else if ((ssl_comp_methods == NULL)
1194                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1195                 {
1196                 OPENSSL_free(comp);
1197                 MemCheck_on();
1198                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1199                 return(1);
1200                 }
1201         else
1202                 {
1203                 MemCheck_on();
1204                 return(0);
1205                 }
1206         }
1207
1208 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1209         {
1210         if (comp)
1211                 return comp->name;
1212         return NULL;
1213         }
1214