fix incorrect strength bit values for certain Kerberos ciphersuites
[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 (c) 1998-2007 The OpenSSL Project.  All rights reserved.
60  *
61  * Redistribution and use in source and binary forms, with or without
62  * modification, are permitted provided that the following conditions
63  * are met:
64  *
65  * 1. Redistributions of source code must retain the above copyright
66  *    notice, this list of conditions and the following disclaimer. 
67  *
68  * 2. Redistributions in binary form must reproduce the above copyright
69  *    notice, this list of conditions and the following disclaimer in
70  *    the documentation and/or other materials provided with the
71  *    distribution.
72  *
73  * 3. All advertising materials mentioning features or use of this
74  *    software must display the following acknowledgment:
75  *    "This product includes software developed by the OpenSSL Project
76  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77  *
78  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79  *    endorse or promote products derived from this software without
80  *    prior written permission. For written permission, please contact
81  *    openssl-core@openssl.org.
82  *
83  * 5. Products derived from this software may not be called "OpenSSL"
84  *    nor may "OpenSSL" appear in their names without prior written
85  *    permission of the OpenSSL Project.
86  *
87  * 6. Redistributions of any form whatsoever must retain the following
88  *    acknowledgment:
89  *    "This product includes software developed by the OpenSSL Project
90  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91  *
92  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
96  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103  * OF THE POSSIBILITY OF SUCH DAMAGE.
104  * ====================================================================
105  *
106  * This product includes cryptographic software written by Eric Young
107  * (eay@cryptsoft.com).  This product includes software written by Tim
108  * Hudson (tjh@cryptsoft.com).
109  *
110  */
111 /* ====================================================================
112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113  * ECC cipher suite support in OpenSSL originally developed by 
114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115  */
116 /* ====================================================================
117  * Copyright 2005 Nokia. All rights reserved.
118  *
119  * The portions of the attached software ("Contribution") is developed by
120  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
121  * license.
122  *
123  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
124  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
125  * support (see RFC 4279) to OpenSSL.
126  *
127  * No patent licenses or other rights except those expressly stated in
128  * the OpenSSL open source license shall be deemed granted or received
129  * expressly, by implication, estoppel, or otherwise.
130  *
131  * No assurances are provided by Nokia that the Contribution does not
132  * infringe the patent or other intellectual property rights of any third
133  * party or that the license provides you with all the necessary rights
134  * to make use of the Contribution.
135  *
136  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
137  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
138  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
139  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
140  * OTHERWISE.
141  */
142
143 #include <stdio.h>
144 #include <openssl/objects.h>
145 #include <openssl/comp.h>
146 #include "ssl_locl.h"
147
148 #define SSL_ENC_DES_IDX         0
149 #define SSL_ENC_3DES_IDX        1
150 #define SSL_ENC_RC4_IDX         2
151 #define SSL_ENC_RC2_IDX         3
152 #define SSL_ENC_IDEA_IDX        4
153 #define SSL_ENC_NULL_IDX        5
154 #define SSL_ENC_AES128_IDX      6
155 #define SSL_ENC_AES256_IDX      7
156 #define SSL_ENC_CAMELLIA128_IDX 8
157 #define SSL_ENC_CAMELLIA256_IDX 9
158 #define SSL_ENC_NUM_IDX         10
159
160
161 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
162         NULL,NULL,NULL,NULL,NULL,NULL,
163         };
164
165 #define SSL_COMP_NULL_IDX       0
166 #define SSL_COMP_ZLIB_IDX       1
167 #define SSL_COMP_NUM_IDX        2
168
169 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
170
171 #define SSL_MD_MD5_IDX  0
172 #define SSL_MD_SHA1_IDX 1
173 #define SSL_MD_NUM_IDX  2
174 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
175         NULL,NULL,
176         };
177
178 #define CIPHER_ADD      1
179 #define CIPHER_KILL     2
180 #define CIPHER_DEL      3
181 #define CIPHER_ORD      4
182 #define CIPHER_SPECIAL  5
183
184 typedef struct cipher_order_st
185         {
186         SSL_CIPHER *cipher;
187         int active;
188         int dead;
189         struct cipher_order_st *next,*prev;
190         } CIPHER_ORDER;
191
192 static const SSL_CIPHER cipher_aliases[]={
193         /* "ALL" doesn't include eNULL (must be specifically enabled) */
194         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
195         /* "COMPLEMENTOFALL" */
196         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
197
198         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
199         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
200
201         /* key exchange aliases
202          * (some of those using only a single bit here combine
203          * multiple key exchange algs according to the RFCs,
204          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
205         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
206
207         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
208         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
209         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
210         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
211         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
212
213         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
214
215         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
216         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
217         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
218         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
219         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
220
221         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
222
223
224         /* server authentication aliases */
225         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
226         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
227         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
228         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
229         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
230         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
231         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
232         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
233         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
234         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
235
236
237         /* aliases combining key exchange and server authentication */
238         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
239         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
240         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
241         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
242         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
243         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
244         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
245         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
246
247
248         /* symmetric encryption aliases */
249         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
250         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
251         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
252         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
253         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
254         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
255         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
256         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
257         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
258         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
259         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
260         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
261
262         /* MAC aliases */       
263         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
264         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
265         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
266
267         /* protocol version aliases */
268         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
269         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
270         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
271
272         /* export flag */
273         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
274         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
275
276         /* strength classes */
277         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
278         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
279         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
280         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
281         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
282         };
283
284 void ssl_load_ciphers(void)
285         {
286         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
287                 EVP_get_cipherbyname(SN_des_cbc);
288         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
289                 EVP_get_cipherbyname(SN_des_ede3_cbc);
290         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
291                 EVP_get_cipherbyname(SN_rc4);
292         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
293                 EVP_get_cipherbyname(SN_rc2_cbc);
294 #ifndef OPENSSL_NO_IDEA
295         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
296                 EVP_get_cipherbyname(SN_idea_cbc);
297 #else
298         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
299 #endif
300         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
301           EVP_get_cipherbyname(SN_aes_128_cbc);
302         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
303           EVP_get_cipherbyname(SN_aes_256_cbc);
304         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
305           EVP_get_cipherbyname(SN_camellia_128_cbc);
306         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
307           EVP_get_cipherbyname(SN_camellia_256_cbc);
308
309         ssl_digest_methods[SSL_MD_MD5_IDX]=
310                 EVP_get_digestbyname(SN_md5);
311         ssl_digest_methods[SSL_MD_SHA1_IDX]=
312                 EVP_get_digestbyname(SN_sha1);
313         }
314
315
316 #ifndef OPENSSL_NO_COMP
317
318 static int sk_comp_cmp(const SSL_COMP * const *a,
319                         const SSL_COMP * const *b)
320         {
321         return((*a)->id-(*b)->id);
322         }
323
324 static void load_builtin_compressions(void)
325         {
326         int got_write_lock = 0;
327
328         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
329         if (ssl_comp_methods == NULL)
330                 {
331                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
332                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
333                 got_write_lock = 1;
334                 
335                 if (ssl_comp_methods == NULL)
336                         {
337                         SSL_COMP *comp = NULL;
338
339                         MemCheck_off();
340                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
341                         if (ssl_comp_methods != NULL)
342                                 {
343                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
344                                 if (comp != NULL)
345                                         {
346                                         comp->method=COMP_zlib();
347                                         if (comp->method
348                                                 && comp->method->type == NID_undef)
349                                                 OPENSSL_free(comp);
350                                         else
351                                                 {
352                                                 comp->id=SSL_COMP_ZLIB_IDX;
353                                                 comp->name=comp->method->name;
354                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
355                                                 }
356                                         }
357                                 }
358                         MemCheck_on();
359                         }
360                 }
361         
362         if (got_write_lock)
363                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
364         else
365                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
366         }
367 #endif
368
369 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
370              const EVP_MD **md, SSL_COMP **comp)
371         {
372         int i;
373         SSL_CIPHER *c;
374
375         c=s->cipher;
376         if (c == NULL) return(0);
377         if (comp != NULL)
378                 {
379                 SSL_COMP ctmp;
380 #ifndef OPENSSL_NO_COMP
381                 load_builtin_compressions();
382 #endif
383
384                 *comp=NULL;
385                 ctmp.id=s->compress_meth;
386                 if (ssl_comp_methods != NULL)
387                         {
388                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
389                         if (i >= 0)
390                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
391                         else
392                                 *comp=NULL;
393                         }
394                 }
395
396         if ((enc == NULL) || (md == NULL)) return(0);
397
398         switch (c->algorithm_enc)
399                 {
400         case SSL_DES:
401                 i=SSL_ENC_DES_IDX;
402                 break;
403         case SSL_3DES:
404                 i=SSL_ENC_3DES_IDX;
405                 break;
406         case SSL_RC4:
407                 i=SSL_ENC_RC4_IDX;
408                 break;
409         case SSL_RC2:
410                 i=SSL_ENC_RC2_IDX;
411                 break;
412         case SSL_IDEA:
413                 i=SSL_ENC_IDEA_IDX;
414                 break;
415         case SSL_eNULL:
416                 i=SSL_ENC_NULL_IDX;
417                 break;
418         case SSL_AES128:
419                 i=SSL_ENC_AES128_IDX;
420                 break;
421         case SSL_AES256:
422                 i=SSL_ENC_AES256_IDX;
423                 break;
424         case SSL_CAMELLIA128:
425                 i=SSL_ENC_CAMELLIA128_IDX;
426                 break;
427         case SSL_CAMELLIA256:
428                 i=SSL_ENC_CAMELLIA256_IDX;
429                 break;
430         default:
431                 i= -1;
432                 break;
433                 }
434
435         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
436                 *enc=NULL;
437         else
438                 {
439                 if (i == SSL_ENC_NULL_IDX)
440                         *enc=EVP_enc_null();
441                 else
442                         *enc=ssl_cipher_methods[i];
443                 }
444
445         switch (c->algorithm_mac)
446                 {
447         case SSL_MD5:
448                 i=SSL_MD_MD5_IDX;
449                 break;
450         case SSL_SHA1:
451                 i=SSL_MD_SHA1_IDX;
452                 break;
453         default:
454                 i= -1;
455                 break;
456                 }
457         if ((i < 0) || (i > SSL_MD_NUM_IDX))
458                 *md=NULL;
459         else
460                 *md=ssl_digest_methods[i];
461
462         if ((*enc != NULL) && (*md != NULL))
463                 return(1);
464         else
465                 return(0);
466         }
467
468 #define ITEM_SEP(a) \
469         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
470
471 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
472              CIPHER_ORDER **tail)
473         {
474         if (curr == *tail) return;
475         if (curr == *head)
476                 *head=curr->next;
477         if (curr->prev != NULL)
478                 curr->prev->next=curr->next;
479         if (curr->next != NULL) /* should always be true */
480                 curr->next->prev=curr->prev;
481         (*tail)->next=curr;
482         curr->prev= *tail;
483         curr->next=NULL;
484         *tail=curr;
485         }
486
487 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
488         {
489         *mkey = 0;
490         *auth = 0;
491         *enc = 0;
492         *mac = 0;
493         *ssl = 0;
494
495 #ifdef OPENSSL_NO_RSA
496         *mkey |= SSL_kRSA;
497         *auth |= SSL_aRSA;
498 #endif
499 #ifdef OPENSSL_NO_DSA
500         *auth |= SSL_aDSS;
501 #endif
502         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
503         *auth |= SSL_aDH;
504 #ifdef OPENSSL_NO_DH
505         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
506         *auth |= SSL_aDH;
507 #endif
508 #ifdef OPENSSL_NO_KRB5
509         *mkey |= SSL_kKRB5;
510         *auth |= SSL_aKRB5;
511 #endif
512 #ifdef OPENSSL_NO_ECDSA
513         *auth |= SSL_aECDSA;
514 #endif
515 #ifdef OPENSSL_NO_ECDH
516         *mkey |= SSL_kECDHe|SSL_kECDHr;
517         *auth |= SSL_aECDH;
518 #endif
519 #ifdef OPENSSL_NO_PSK
520         *mkey |= SSL_kPSK;
521         *auth |= SSL_aPSK;
522 #endif
523 #ifdef SSL_FORBID_ENULL
524         *enc |= SSL_eNULL;
525 #endif
526
527         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
528         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
529         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
530         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
531         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
532         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
533         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
534         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
535         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
536
537         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
538         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
539         }
540
541 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
542                 int num_of_ciphers,
543                 unsigned long disabled_mkey, unsigned long disabled_auth,
544                 unsigned long disabled_enc, unsigned long disabled_mac,
545                 unsigned long disabled_ssl,
546                 CIPHER_ORDER *co_list,
547                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
548         {
549         int i, co_list_num;
550         SSL_CIPHER *c;
551
552         /*
553          * We have num_of_ciphers descriptions compiled in, depending on the
554          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
555          * These will later be sorted in a linked list with at most num
556          * entries.
557          */
558
559         /* Get the initial list of ciphers */
560         co_list_num = 0;        /* actual count of ciphers */
561         for (i = 0; i < num_of_ciphers; i++)
562                 {
563                 c = ssl_method->get_cipher(i);
564                 /* drop those that use any of that is not available */
565                 if ((c != NULL) && c->valid &&
566                     !(c->algorithm_mkey & disabled_mkey) &&
567                     !(c->algorithm_auth & disabled_auth) &&
568                     !(c->algorithm_enc & disabled_enc) &&
569                     !(c->algorithm_mac & disabled_mac) &&
570                     !(c->algorithm_ssl & disabled_ssl))
571                         {
572                         co_list[co_list_num].cipher = c;
573                         co_list[co_list_num].next = NULL;
574                         co_list[co_list_num].prev = NULL;
575                         co_list[co_list_num].active = 0;
576                         co_list_num++;
577 #ifdef KSSL_DEBUG
578                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
579 #endif  /* KSSL_DEBUG */
580                         /*
581                         if (!sk_push(ca_list,(char *)c)) goto err;
582                         */
583                         }
584                 }
585
586         /*
587          * Prepare linked list from list entries
588          */     
589         for (i = 1; i < co_list_num - 1; i++)
590                 {
591                 co_list[i].prev = &(co_list[i-1]);
592                 co_list[i].next = &(co_list[i+1]);
593                 }
594         if (co_list_num > 0)
595                 {
596                 (*head_p) = &(co_list[0]);
597                 (*head_p)->prev = NULL;
598                 (*head_p)->next = &(co_list[1]);
599                 (*tail_p) = &(co_list[co_list_num - 1]);
600                 (*tail_p)->prev = &(co_list[co_list_num - 2]);
601                 (*tail_p)->next = NULL;
602                 }
603         }
604
605 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
606                         int num_of_group_aliases,
607                         unsigned long disabled_mkey, unsigned long disabled_auth,
608                         unsigned long disabled_enc, unsigned long disabled_mac,
609                         unsigned long disabled_ssl,
610                         CIPHER_ORDER *head)
611         {
612         CIPHER_ORDER *ciph_curr;
613         SSL_CIPHER **ca_curr;
614         int i;
615         unsigned long mask_mkey = ~disabled_mkey;
616         unsigned long mask_auth = ~disabled_auth;
617         unsigned long mask_enc = ~disabled_enc;
618         unsigned long mask_mac = ~disabled_mac;
619         unsigned long mask_ssl = ~disabled_ssl;
620
621         /*
622          * First, add the real ciphers as already collected
623          */
624         ciph_curr = head;
625         ca_curr = ca_list;
626         while (ciph_curr != NULL)
627                 {
628                 *ca_curr = ciph_curr->cipher;
629                 ca_curr++;
630                 ciph_curr = ciph_curr->next;
631                 }
632
633         /*
634          * Now we add the available ones from the cipher_aliases[] table.
635          * They represent either one or more algorithms, some of which
636          * in any affected category must be supported (set in enabled_mask),
637          * or represent a cipher strength value (will be added in any case because algorithms=0).
638          */
639         for (i = 0; i < num_of_group_aliases; i++)
640                 {
641                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
642                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
643                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
644                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
645                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
646
647                 if (algorithm_mkey)
648                         if ((algorithm_mkey & mask_mkey) == 0)
649                                 continue;
650         
651                 if (algorithm_auth)
652                         if ((algorithm_auth & mask_auth) == 0)
653                                 continue;
654                 
655                 if (algorithm_enc)
656                         if ((algorithm_enc & mask_enc) == 0)
657                                 continue;
658                 
659                 if (algorithm_mac)
660                         if ((algorithm_mac & mask_mac) == 0)
661                                 continue;
662                 
663                 if (algorithm_ssl)
664                         if ((algorithm_ssl & mask_ssl) == 0)
665                                 continue;
666                 
667                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
668                 ca_curr++;
669                 }
670
671         *ca_curr = NULL;        /* end of list */
672         }
673
674 static void ssl_cipher_apply_rule(unsigned long cipher_id,
675                 unsigned long alg_mkey, unsigned long alg_auth,
676                 unsigned long alg_enc, unsigned long alg_mac,
677                 unsigned long alg_ssl,
678                 unsigned long algo_strength,
679                 int rule, int strength_bits,
680                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
681         {
682         CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
683         SSL_CIPHER *cp;
684
685 #ifdef CIPHER_DEBUG
686         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
687                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
688 #endif
689
690         curr = head = *head_p;
691         curr2 = head;
692         tail2 = tail = *tail_p;
693         for (;;)
694                 {
695                 if ((curr == NULL) || (curr == tail2)) break;
696                 curr = curr2;
697                 curr2 = curr->next;
698
699                 cp = curr->cipher;
700
701                 /*
702                  * Selection criteria is either the value of strength_bits
703                  * or the algorithms used.
704                  */
705                 if (strength_bits >= 0)
706                         {
707                         if (strength_bits != cp->strength_bits)
708                                 continue;
709                         }
710                 else
711                         {
712 #ifdef CIPHER_DEBUG
713                         printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
714 #endif
715
716                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
717                                 continue;
718                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
719                                 continue;
720                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
721                                 continue;
722                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
723                                 continue;
724                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
725                                 continue;
726                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
727                                 continue;
728                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
729                                 continue;
730                         }
731
732 #ifdef CIPHER_DEBUG
733                 printf("Action = %d\n", rule);
734 #endif
735
736                 /* add the cipher if it has not been added yet. */
737                 if (rule == CIPHER_ADD)
738                         {
739                         if (!curr->active)
740                                 {
741                                 ll_append_tail(&head, curr, &tail);
742                                 curr->active = 1;
743                                 }
744                         }
745                 /* Move the added cipher to this location */
746                 else if (rule == CIPHER_ORD)
747                         {
748                         if (curr->active)
749                                 {
750                                 ll_append_tail(&head, curr, &tail);
751                                 }
752                         }
753                 else if (rule == CIPHER_DEL)
754                         curr->active = 0;
755                 else if (rule == CIPHER_KILL)
756                         {
757                         if (head == curr)
758                                 head = curr->next;
759                         else
760                                 curr->prev->next = curr->next;
761                         if (tail == curr)
762                                 tail = curr->prev;
763                         curr->active = 0;
764                         if (curr->next != NULL)
765                                 curr->next->prev = curr->prev;
766                         if (curr->prev != NULL)
767                                 curr->prev->next = curr->next;
768                         curr->next = NULL;
769                         curr->prev = NULL;
770                         }
771                 }
772
773         *head_p = head;
774         *tail_p = tail;
775         }
776
777 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
778                                     CIPHER_ORDER **tail_p)
779         {
780         int max_strength_bits, i, *number_uses;
781         CIPHER_ORDER *curr;
782
783         /*
784          * This routine sorts the ciphers with descending strength. The sorting
785          * must keep the pre-sorted sequence, so we apply the normal sorting
786          * routine as '+' movement to the end of the list.
787          */
788         max_strength_bits = 0;
789         curr = *head_p;
790         while (curr != NULL)
791                 {
792                 if (curr->active &&
793                     (curr->cipher->strength_bits > max_strength_bits))
794                     max_strength_bits = curr->cipher->strength_bits;
795                 curr = curr->next;
796                 }
797
798         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
799         if (!number_uses)
800                 {
801                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
802                 return(0);
803                 }
804         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
805
806         /*
807          * Now find the strength_bits values actually used
808          */
809         curr = *head_p;
810         while (curr != NULL)
811                 {
812                 if (curr->active)
813                         number_uses[curr->cipher->strength_bits]++;
814                 curr = curr->next;
815                 }
816         /*
817          * Go through the list of used strength_bits values in descending
818          * order.
819          */
820         for (i = max_strength_bits; i >= 0; i--)
821                 if (number_uses[i] > 0)
822                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
823
824         OPENSSL_free(number_uses);
825         return(1);
826         }
827
828 static int ssl_cipher_process_rulestr(const char *rule_str,
829                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
830                 SSL_CIPHER **ca_list)
831         {
832         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
833         const char *l, *start, *buf;
834         int j, multi, found, rule, retval, ok, buflen;
835         unsigned long cipher_id = 0;
836         char ch;
837
838         retval = 1;
839         l = rule_str;
840         for (;;)
841                 {
842                 ch = *l;
843
844                 if (ch == '\0')
845                         break;          /* done */
846                 if (ch == '-')
847                         { rule = CIPHER_DEL; l++; }
848                 else if (ch == '+')
849                         { rule = CIPHER_ORD; l++; }
850                 else if (ch == '!')
851                         { rule = CIPHER_KILL; l++; }
852                 else if (ch == '@')
853                         { rule = CIPHER_SPECIAL; l++; }
854                 else
855                         { rule = CIPHER_ADD; }
856
857                 if (ITEM_SEP(ch))
858                         {
859                         l++;
860                         continue;
861                         }
862
863                 alg_mkey = 0;
864                 alg_auth = 0;
865                 alg_enc = 0;
866                 alg_mac = 0;
867                 alg_ssl = 0;
868                 algo_strength = 0;
869
870                 start=l;
871                 for (;;)
872                         {
873                         ch = *l;
874                         buf = l;
875                         buflen = 0;
876 #ifndef CHARSET_EBCDIC
877                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
878                                 ((ch >= '0') && (ch <= '9')) ||
879                                 ((ch >= 'a') && (ch <= 'z')) ||
880                                  (ch == '-'))
881 #else
882                         while ( isalnum(ch) || (ch == '-'))
883 #endif
884                                  {
885                                  ch = *(++l);
886                                  buflen++;
887                                  }
888
889                         if (buflen == 0)
890                                 {
891                                 /*
892                                  * We hit something we cannot deal with,
893                                  * it is no command or separator nor
894                                  * alphanumeric, so we call this an error.
895                                  */
896                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
897                                        SSL_R_INVALID_COMMAND);
898                                 retval = found = 0;
899                                 l++;
900                                 break;
901                                 }
902
903                         if (rule == CIPHER_SPECIAL)
904                                 {
905                                 found = 0; /* unused -- avoid compiler warning */
906                                 break;  /* special treatment */
907                                 }
908
909                         /* check for multi-part specification */
910                         if (ch == '+')
911                                 {
912                                 multi=1;
913                                 l++;
914                                 }
915                         else
916                                 multi=0;
917
918                         /*
919                          * Now search for the cipher alias in the ca_list. Be careful
920                          * with the strncmp, because the "buflen" limitation
921                          * will make the rule "ADH:SOME" and the cipher
922                          * "ADH-MY-CIPHER" look like a match for buflen=3.
923                          * So additionally check whether the cipher name found
924                          * has the correct length. We can save a strlen() call:
925                          * just checking for the '\0' at the right place is
926                          * sufficient, we have to strncmp() anyway. (We cannot
927                          * use strcmp(), because buf is not '\0' terminated.)
928                          */
929                         j = found = 0;
930                         cipher_id = 0;
931                         while (ca_list[j])
932                                 {
933                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
934                                     (ca_list[j]->name[buflen] == '\0'))
935                                         {
936                                         found = 1;
937                                         break;
938                                         }
939                                 else
940                                         j++;
941                                 }
942
943                         if (!found)
944                                 break;  /* ignore this entry */
945
946                         if (ca_list[j]->algorithm_mkey)
947                                 {
948                                 if (alg_mkey)
949                                         {
950                                         alg_mkey &= ca_list[j]->algorithm_mkey;
951                                         if (!alg_mkey) { found = 0; break; }
952                                         }
953                                 else
954                                         alg_mkey = ca_list[j]->algorithm_mkey;
955                                 }
956
957                         if (ca_list[j]->algorithm_auth)
958                                 {
959                                 if (alg_auth)
960                                         {
961                                         alg_auth &= ca_list[j]->algorithm_auth;
962                                         if (!alg_auth) { found = 0; break; }
963                                         }
964                                 else
965                                         alg_auth = ca_list[j]->algorithm_auth;
966                                 }
967                         
968                         if (ca_list[j]->algorithm_enc)
969                                 {
970                                 if (alg_enc)
971                                         {
972                                         alg_enc &= ca_list[j]->algorithm_enc;
973                                         if (!alg_enc) { found = 0; break; }
974                                         }
975                                 else
976                                         alg_enc = ca_list[j]->algorithm_enc;
977                                 }
978                                                 
979                         if (ca_list[j]->algorithm_mac)
980                                 {
981                                 if (alg_mac)
982                                         {
983                                         alg_mac &= ca_list[j]->algorithm_mac;
984                                         if (!alg_mac) { found = 0; break; }
985                                         }
986                                 else
987                                         alg_mac = ca_list[j]->algorithm_mac;
988                                 }
989                         
990                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
991                                 {
992                                 if (algo_strength & SSL_EXP_MASK)
993                                         {
994                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
995                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
996                                         }
997                                 else
998                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
999                                 }
1000
1001                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1002                                 {
1003                                 if (algo_strength & SSL_STRONG_MASK)
1004                                         {
1005                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1006                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1007                                         }
1008                                 else
1009                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1010                                 }
1011                         
1012                         if (ca_list[j]->valid)
1013                                 {
1014                                 /* explicit ciphersuite found; its protocol version
1015                                  * does not become part of the search pattern!*/
1016
1017                                 cipher_id = ca_list[j]->id;
1018                                 }
1019                         else
1020                                 {
1021                                 /* not an explicit ciphersuite; only in this case, the
1022                                  * protocol version is considered part of the search pattern */
1023
1024                                 if (ca_list[j]->algorithm_ssl)
1025                                         {
1026                                         if (alg_ssl)
1027                                                 {
1028                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1029                                                 if (!alg_ssl) { found = 0; break; }
1030                                                 }
1031                                         else
1032                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1033                                         }
1034                                 }
1035                         
1036                         if (!multi) break;
1037                         }
1038
1039                 /*
1040                  * Ok, we have the rule, now apply it
1041                  */
1042                 if (rule == CIPHER_SPECIAL)
1043                         {       /* special command */
1044                         ok = 0;
1045                         if ((buflen == 8) &&
1046                                 !strncmp(buf, "STRENGTH", 8))
1047                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1048                         else
1049                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1050                                         SSL_R_INVALID_COMMAND);
1051                         if (ok == 0)
1052                                 retval = 0;
1053                         /*
1054                          * We do not support any "multi" options
1055                          * together with "@", so throw away the
1056                          * rest of the command, if any left, until
1057                          * end or ':' is found.
1058                          */
1059                         while ((*l != '\0') && !ITEM_SEP(*l))
1060                                 l++;
1061                         }
1062                 else if (found)
1063                         {
1064                         ssl_cipher_apply_rule(cipher_id,
1065                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1066                                 rule, -1, head_p, tail_p);
1067                         }
1068                 else
1069                         {
1070                         while ((*l != '\0') && !ITEM_SEP(*l))
1071                                 l++;
1072                         }
1073                 if (*l == '\0') break; /* done */
1074                 }
1075
1076         return(retval);
1077         }
1078
1079 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1080                 STACK_OF(SSL_CIPHER) **cipher_list,
1081                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1082                 const char *rule_str)
1083         {
1084         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1085         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1086         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1087         const char *rule_p;
1088         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1089         SSL_CIPHER **ca_list = NULL;
1090
1091         /*
1092          * Return with error if nothing to do.
1093          */
1094         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1095                 return NULL;
1096
1097         /*
1098          * To reduce the work to do we only want to process the compiled
1099          * in algorithms, so we first get the mask of disabled ciphers.
1100          */
1101         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1102
1103         /*
1104          * Now we have to collect the available ciphers from the compiled
1105          * in ciphers. We cannot get more than the number compiled in, so
1106          * it is used for allocation.
1107          */
1108         num_of_ciphers = ssl_method->num_ciphers();
1109 #ifdef KSSL_DEBUG
1110         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1111 #endif    /* KSSL_DEBUG */
1112         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1113         if (co_list == NULL)
1114                 {
1115                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1116                 return(NULL);   /* Failure */
1117                 }
1118
1119         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1120                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1121                                    co_list, &head, &tail);
1122
1123         /*
1124          * We also need cipher aliases for selecting based on the rule_str.
1125          * There might be two types of entries in the rule_str: 1) names
1126          * of ciphers themselves 2) aliases for groups of ciphers.
1127          * For 1) we need the available ciphers and for 2) the cipher
1128          * groups of cipher_aliases added together in one list (otherwise
1129          * we would be happy with just the cipher_aliases table).
1130          */
1131         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1132         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1133         ca_list =
1134                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1135         if (ca_list == NULL)
1136                 {
1137                 OPENSSL_free(co_list);
1138                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1139                 return(NULL);   /* Failure */
1140                 }
1141         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1142                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1143                                    head);
1144
1145         /*
1146          * If the rule_string begins with DEFAULT, apply the default rule
1147          * before using the (possibly available) additional rules.
1148          */
1149         ok = 1;
1150         rule_p = rule_str;
1151         if (strncmp(rule_str,"DEFAULT",7) == 0)
1152                 {
1153                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1154                         &head, &tail, ca_list);
1155                 rule_p += 7;
1156                 if (*rule_p == ':')
1157                         rule_p++;
1158                 }
1159
1160         if (ok && (strlen(rule_p) > 0))
1161                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1162
1163         OPENSSL_free(ca_list);  /* Not needed anymore */
1164
1165         if (!ok)
1166                 {       /* Rule processing failure */
1167                 OPENSSL_free(co_list);
1168                 return(NULL);
1169                 }
1170         /*
1171          * Allocate new "cipherstack" for the result, return with error
1172          * if we cannot get one.
1173          */
1174         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1175                 {
1176                 OPENSSL_free(co_list);
1177                 return(NULL);
1178                 }
1179
1180         /*
1181          * The cipher selection for the list is done. The ciphers are added
1182          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1183          */
1184         for (curr = head; curr != NULL; curr = curr->next)
1185                 {
1186                 if (curr->active)
1187                         {
1188                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1189 #ifdef CIPHER_DEBUG
1190                         printf("<%s>\n",curr->cipher->name);
1191 #endif
1192                         }
1193                 }
1194         OPENSSL_free(co_list);  /* Not needed any longer */
1195
1196         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1197         if (tmp_cipher_list == NULL)
1198                 {
1199                 sk_SSL_CIPHER_free(cipherstack);
1200                 return NULL;
1201                 }
1202         if (*cipher_list != NULL)
1203                 sk_SSL_CIPHER_free(*cipher_list);
1204         *cipher_list = cipherstack;
1205         if (*cipher_list_by_id != NULL)
1206                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1207         *cipher_list_by_id = tmp_cipher_list;
1208         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1209
1210         return(cipherstack);
1211         }
1212
1213 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1214         {
1215         int is_export,pkl,kl;
1216         const char *ver,*exp_str;
1217         const char *kx,*au,*enc,*mac;
1218         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1219 #ifdef KSSL_DEBUG
1220         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1221 #else
1222         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1223 #endif /* KSSL_DEBUG */
1224
1225         alg_mkey = cipher->algorithm_mkey;
1226         alg_auth = cipher->algorithm_auth;
1227         alg_enc = cipher->algorithm_enc;
1228         alg_mac = cipher->algorithm_mac;
1229         alg_ssl = cipher->algorithm_ssl;
1230
1231         alg_s=cipher->algo_strength;
1232         alg2=cipher->algorithm2;
1233
1234         is_export=SSL_C_IS_EXPORT(cipher);
1235         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1236         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1237         exp_str=is_export?" export":"";
1238         
1239         if (alg_ssl & SSL_SSLV2)
1240                 ver="SSLv2";
1241         else if (alg_ssl & SSL_SSLV3)
1242                 ver="SSLv3";
1243         else
1244                 ver="unknown";
1245
1246         switch (alg_mkey)
1247                 {
1248         case SSL_kRSA:
1249                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1250                 break;
1251         case SSL_kDHr:
1252                 kx="DH/RSA";
1253                 break;
1254         case SSL_kDHd:
1255                 kx="DH/DSS";
1256                 break;
1257         case SSL_kKRB5:
1258                 kx="KRB5";
1259                 break;
1260         case SSL_kEDH:
1261                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1262                 break;
1263         case SSL_kECDHr:
1264                 kx="ECDH/RSA";
1265                 break;
1266         case SSL_kECDHe:
1267                 kx="ECDH/ECDSA";
1268                 break;
1269         case SSL_kEECDH:
1270                 kx="ECDH";
1271                 break;
1272         case SSL_kPSK:
1273                 kx="PSK";
1274                 break;
1275         default:
1276                 kx="unknown";
1277                 }
1278
1279         switch (alg_auth)
1280                 {
1281         case SSL_aRSA:
1282                 au="RSA";
1283                 break;
1284         case SSL_aDSS:
1285                 au="DSS";
1286                 break;
1287         case SSL_aDH:
1288                 au="DH";
1289                 break;
1290         case SSL_aKRB5:
1291                 au="KRB5";
1292                 break;
1293         case SSL_aECDH:
1294                 au="ECDH";
1295                 break;
1296         case SSL_aNULL:
1297                 au="None";
1298                 break;
1299         case SSL_aECDSA:
1300                 au="ECDSA";
1301                 break;
1302         case SSL_aPSK:
1303                 au="PSK";
1304                 break;
1305         default:
1306                 au="unknown";
1307                 break;
1308                 }
1309
1310         switch (alg_enc)
1311                 {
1312         case SSL_DES:
1313                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1314                 break;
1315         case SSL_3DES:
1316                 enc="3DES(168)";
1317                 break;
1318         case SSL_RC4:
1319                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1320                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1321                 break;
1322         case SSL_RC2:
1323                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1324                 break;
1325         case SSL_IDEA:
1326                 enc="IDEA(128)";
1327                 break;
1328         case SSL_eNULL:
1329                 enc="None";
1330                 break;
1331         case SSL_AES128:
1332                 enc="AES(128)";
1333                 break;
1334         case SSL_AES256:
1335                 enc="AES(256)";
1336                 break;
1337         case SSL_CAMELLIA128:
1338                 enc="Camellia(128)";
1339                 break;
1340         case SSL_CAMELLIA256:
1341                 enc="Camellia(256)";
1342                 break;
1343         default:
1344                 enc="unknown";
1345                 break;
1346                 }
1347
1348         switch (alg_mac)
1349                 {
1350         case SSL_MD5:
1351                 mac="MD5";
1352                 break;
1353         case SSL_SHA1:
1354                 mac="SHA1";
1355                 break;
1356         default:
1357                 mac="unknown";
1358                 break;
1359                 }
1360
1361         if (buf == NULL)
1362                 {
1363                 len=128;
1364                 buf=OPENSSL_malloc(len);
1365                 if (buf == NULL) return("OPENSSL_malloc Error");
1366                 }
1367         else if (len < 128)
1368                 return("Buffer too small");
1369
1370 #ifdef KSSL_DEBUG
1371         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1372 #else
1373         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1374 #endif /* KSSL_DEBUG */
1375         return(buf);
1376         }
1377
1378 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1379         {
1380         int i;
1381
1382         if (c == NULL) return("(NONE)");
1383         i=(int)(c->id>>24L);
1384         if (i == 3)
1385                 return("TLSv1/SSLv3");
1386         else if (i == 2)
1387                 return("SSLv2");
1388         else
1389                 return("unknown");
1390         }
1391
1392 /* return the actual cipher being used */
1393 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1394         {
1395         if (c != NULL)
1396                 return(c->name);
1397         return("(NONE)");
1398         }
1399
1400 /* number of bits for symmetric cipher */
1401 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1402         {
1403         int ret=0;
1404
1405         if (c != NULL)
1406                 {
1407                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1408                 ret = c->strength_bits;
1409                 }
1410         return(ret);
1411         }
1412
1413 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1414         {
1415         SSL_COMP *ctmp;
1416         int i,nn;
1417
1418         if ((n == 0) || (sk == NULL)) return(NULL);
1419         nn=sk_SSL_COMP_num(sk);
1420         for (i=0; i<nn; i++)
1421                 {
1422                 ctmp=sk_SSL_COMP_value(sk,i);
1423                 if (ctmp->id == n)
1424                         return(ctmp);
1425                 }
1426         return(NULL);
1427         }
1428
1429 #ifdef OPENSSL_NO_COMP
1430 void *SSL_COMP_get_compression_methods(void)
1431         {
1432         return NULL;
1433         }
1434 int SSL_COMP_add_compression_method(int id, void *cm)
1435         {
1436         return 1;
1437         }
1438
1439 const char *SSL_COMP_get_name(const void *comp)
1440         {
1441         return NULL;
1442         }
1443 #else
1444 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1445         {
1446         load_builtin_compressions();
1447         return(ssl_comp_methods);
1448         }
1449
1450 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1451         {
1452         SSL_COMP *comp;
1453
1454         if (cm == NULL || cm->type == NID_undef)
1455                 return 1;
1456
1457         /* According to draft-ietf-tls-compression-04.txt, the
1458            compression number ranges should be the following:
1459
1460            0 to 63:    methods defined by the IETF
1461            64 to 192:  external party methods assigned by IANA
1462            193 to 255: reserved for private use */
1463         if (id < 193 || id > 255)
1464                 {
1465                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1466                 return 0;
1467                 }
1468
1469         MemCheck_off();
1470         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1471         comp->id=id;
1472         comp->method=cm;
1473         load_builtin_compressions();
1474         if (ssl_comp_methods
1475                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1476                 {
1477                 OPENSSL_free(comp);
1478                 MemCheck_on();
1479                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1480                 return(1);
1481                 }
1482         else if ((ssl_comp_methods == NULL)
1483                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1484                 {
1485                 OPENSSL_free(comp);
1486                 MemCheck_on();
1487                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1488                 return(1);
1489                 }
1490         else
1491                 {
1492                 MemCheck_on();
1493                 return(0);
1494                 }
1495         }
1496
1497 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1498         {
1499         if (comp)
1500                 return comp->name;
1501         return NULL;
1502         }
1503
1504 #endif