Update ssl library to support EVP_PKEY MAC API. Include generic MAC support.
[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 <openssl/engine.h>
147 #include "ssl_locl.h"
148
149 #define SSL_ENC_DES_IDX         0
150 #define SSL_ENC_3DES_IDX        1
151 #define SSL_ENC_RC4_IDX         2
152 #define SSL_ENC_RC2_IDX         3
153 #define SSL_ENC_IDEA_IDX        4
154 #define SSL_ENC_NULL_IDX        5
155 #define SSL_ENC_AES128_IDX      6
156 #define SSL_ENC_AES256_IDX      7
157 #define SSL_ENC_CAMELLIA128_IDX 8
158 #define SSL_ENC_CAMELLIA256_IDX 9
159 #define SSL_ENC_GOST89_IDX      10
160 #define SSL_ENC_SEED_IDX        11
161 #define SSL_ENC_NUM_IDX         12
162
163
164 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
165         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
166         };
167
168 #define SSL_COMP_NULL_IDX       0
169 #define SSL_COMP_ZLIB_IDX       1
170 #define SSL_COMP_NUM_IDX        2
171
172 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
173
174 #define SSL_MD_MD5_IDX  0
175 #define SSL_MD_SHA1_IDX 1
176 #define SSL_MD_GOST94_IDX 2
177 #define SSL_MD_GOST89MAC_IDX 3
178 #define SSL_MD_NUM_IDX  4
179 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
180         NULL,NULL,NULL,NULL
181         };
182 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
183  * implementation is engine-provided, we'll fill it only if
184  * corresponding EVP_PKEY_METHOD is found 
185  */
186 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
187         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef
188         };
189
190 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
191         0,0,0,0
192         };
193
194 #define CIPHER_ADD      1
195 #define CIPHER_KILL     2
196 #define CIPHER_DEL      3
197 #define CIPHER_ORD      4
198 #define CIPHER_SPECIAL  5
199
200 typedef struct cipher_order_st
201         {
202         SSL_CIPHER *cipher;
203         int active;
204         int dead;
205         struct cipher_order_st *next,*prev;
206         } CIPHER_ORDER;
207
208 static const SSL_CIPHER cipher_aliases[]={
209         /* "ALL" doesn't include eNULL (must be specifically enabled) */
210         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
211         /* "COMPLEMENTOFALL" */
212         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
213
214         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
215         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
216
217         /* key exchange aliases
218          * (some of those using only a single bit here combine
219          * multiple key exchange algs according to the RFCs,
220          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
221         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
222
223         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
224         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
225         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
226         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
227         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
228
229         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
230
231         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
232         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
233         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
234         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
235         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
236
237         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
238
239
240         /* server authentication aliases */
241         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
242         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
243         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
244         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
245         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
246         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
247         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
248         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
249         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
250         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
251
252
253         /* aliases combining key exchange and server authentication */
254         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
255         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
256         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
257         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
258         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
259         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
260         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
261         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
262
263
264         /* symmetric encryption aliases */
265         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
266         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
267         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
268         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
269         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
270         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
271         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
272         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
273         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
274         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
275         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
276         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
277         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
278
279         /* MAC aliases */       
280         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
281         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
282         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
283         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
284         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
285
286         /* protocol version aliases */
287         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
288         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
289         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
290
291         /* export flag */
292         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
293         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
294
295         /* strength classes */
296         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
297         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
298         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
299         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
300         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
301         };
302
303 void ssl_load_ciphers(void)
304         {
305         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
306                 EVP_get_cipherbyname(SN_des_cbc);
307         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
308                 EVP_get_cipherbyname(SN_des_ede3_cbc);
309         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
310                 EVP_get_cipherbyname(SN_rc4);
311         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
312                 EVP_get_cipherbyname(SN_rc2_cbc);
313 #ifndef OPENSSL_NO_IDEA
314         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
315                 EVP_get_cipherbyname(SN_idea_cbc);
316 #else
317         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
318 #endif
319         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
320           EVP_get_cipherbyname(SN_aes_128_cbc);
321         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
322           EVP_get_cipherbyname(SN_aes_256_cbc);
323         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
324           EVP_get_cipherbyname(SN_camellia_128_cbc);
325         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
326           EVP_get_cipherbyname(SN_camellia_256_cbc);
327         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
328           EVP_get_cipherbyname(SN_gost89_cnt);
329         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
330           EVP_get_cipherbyname(SN_seed_cbc);
331
332         ssl_digest_methods[SSL_MD_MD5_IDX]=
333                 EVP_get_digestbyname(SN_md5);
334         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
335                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
336         ssl_digest_methods[SSL_MD_SHA1_IDX]=
337                 EVP_get_digestbyname(SN_sha1);
338         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
339                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
340         ssl_digest_methods[SSL_MD_GOST94_IDX]=
341                 EVP_get_digestbyname(SN_id_GostR3411_94);
342         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
343                 {       
344                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
345                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
346                 }
347         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
348                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
349                 {
350                 const EVP_PKEY_ASN1_METHOD *ameth;
351                 ENGINE *tmpeng = NULL;
352                 int pkey_id;
353                 ameth = EVP_PKEY_asn1_find_str(&tmpeng,"gost-mac",-1);
354                 if (ameth) 
355                         {
356                         EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
357                         ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]= pkey_id;
358                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
359                         }               
360                 if (tmpeng) ENGINE_finish(tmpeng);      
361                 }
362
363         }
364 #ifndef OPENSSL_NO_COMP
365
366 static int sk_comp_cmp(const SSL_COMP * const *a,
367                         const SSL_COMP * const *b)
368         {
369         return((*a)->id-(*b)->id);
370         }
371
372 static void load_builtin_compressions(void)
373         {
374         int got_write_lock = 0;
375
376         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
377         if (ssl_comp_methods == NULL)
378                 {
379                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
380                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
381                 got_write_lock = 1;
382                 
383                 if (ssl_comp_methods == NULL)
384                         {
385                         SSL_COMP *comp = NULL;
386
387                         MemCheck_off();
388                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
389                         if (ssl_comp_methods != NULL)
390                                 {
391                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
392                                 if (comp != NULL)
393                                         {
394                                         comp->method=COMP_zlib();
395                                         if (comp->method
396                                                 && comp->method->type == NID_undef)
397                                                 OPENSSL_free(comp);
398                                         else
399                                                 {
400                                                 comp->id=SSL_COMP_ZLIB_IDX;
401                                                 comp->name=comp->method->name;
402                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
403                                                 }
404                                         }
405                                 }
406                         MemCheck_on();
407                         }
408                 }
409         
410         if (got_write_lock)
411                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
412         else
413                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
414         }
415 #endif
416
417 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
418              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
419         {
420         int i;
421         SSL_CIPHER *c;
422
423         c=s->cipher;
424         if (c == NULL) return(0);
425         if (comp != NULL)
426                 {
427                 SSL_COMP ctmp;
428 #ifndef OPENSSL_NO_COMP
429                 load_builtin_compressions();
430 #endif
431
432                 *comp=NULL;
433                 ctmp.id=s->compress_meth;
434                 if (ssl_comp_methods != NULL)
435                         {
436                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
437                         if (i >= 0)
438                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
439                         else
440                                 *comp=NULL;
441                         }
442                 }
443
444         if ((enc == NULL) || (md == NULL)) return(0);
445
446         switch (c->algorithm_enc)
447                 {
448         case SSL_DES:
449                 i=SSL_ENC_DES_IDX;
450                 break;
451         case SSL_3DES:
452                 i=SSL_ENC_3DES_IDX;
453                 break;
454         case SSL_RC4:
455                 i=SSL_ENC_RC4_IDX;
456                 break;
457         case SSL_RC2:
458                 i=SSL_ENC_RC2_IDX;
459                 break;
460         case SSL_IDEA:
461                 i=SSL_ENC_IDEA_IDX;
462                 break;
463         case SSL_eNULL:
464                 i=SSL_ENC_NULL_IDX;
465                 break;
466         case SSL_AES128:
467                 i=SSL_ENC_AES128_IDX;
468                 break;
469         case SSL_AES256:
470                 i=SSL_ENC_AES256_IDX;
471                 break;
472         case SSL_CAMELLIA128:
473                 i=SSL_ENC_CAMELLIA128_IDX;
474                 break;
475         case SSL_CAMELLIA256:
476                 i=SSL_ENC_CAMELLIA256_IDX;
477                 break;
478         case SSL_eGOST2814789CNT:
479                 i=SSL_ENC_GOST89_IDX;
480                 break;
481         case SSL_SEED:
482                 i=SSL_ENC_SEED_IDX;
483                 break;
484         default:
485                 i= -1;
486                 break;
487                 }
488
489         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
490                 *enc=NULL;
491         else
492                 {
493                 if (i == SSL_ENC_NULL_IDX)
494                         *enc=EVP_enc_null();
495                 else
496                         *enc=ssl_cipher_methods[i];
497                 }
498
499         switch (c->algorithm_mac)
500                 {
501         case SSL_MD5:
502                 i=SSL_MD_MD5_IDX;
503                 break;
504         case SSL_SHA1:
505                 i=SSL_MD_SHA1_IDX;
506                 break;
507         case SSL_GOST94:
508                 i = SSL_MD_GOST94_IDX;
509                 break;
510         case SSL_GOST89MAC:
511                 i = SSL_MD_GOST89MAC_IDX;
512                 break;
513         default:
514                 i= -1;
515                 break;
516                 }
517         if ((i < 0) || (i > SSL_MD_NUM_IDX))
518         {
519                 *md=NULL; 
520                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
521                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
522
523         }
524         else
525         {
526                 *md=ssl_digest_methods[i];
527                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
528                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
529         }       
530
531         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
532                 return(1);
533         else
534                 return(0);
535         }
536
537 #define ITEM_SEP(a) \
538         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
539
540 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
541              CIPHER_ORDER **tail)
542         {
543         if (curr == *tail) return;
544         if (curr == *head)
545                 *head=curr->next;
546         if (curr->prev != NULL)
547                 curr->prev->next=curr->next;
548         if (curr->next != NULL)
549                 curr->next->prev=curr->prev;
550         (*tail)->next=curr;
551         curr->prev= *tail;
552         curr->next=NULL;
553         *tail=curr;
554         }
555
556 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
557              CIPHER_ORDER **tail)
558         {
559         if (curr == *head) return;
560         if (curr == *tail)
561                 *tail=curr->prev;
562         if (curr->next != NULL)
563                 curr->next->prev=curr->prev;
564         if (curr->prev != NULL)
565                 curr->prev->next=curr->next;
566         (*head)->prev=curr;
567         curr->next= *head;
568         curr->prev=NULL;
569         *head=curr;
570         }
571
572 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
573         {
574         *mkey = 0;
575         *auth = 0;
576         *enc = 0;
577         *mac = 0;
578         *ssl = 0;
579
580 #ifdef OPENSSL_NO_RSA
581         *mkey |= SSL_kRSA;
582         *auth |= SSL_aRSA;
583 #endif
584 #ifdef OPENSSL_NO_DSA
585         *auth |= SSL_aDSS;
586 #endif
587         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
588         *auth |= SSL_aDH;
589 #ifdef OPENSSL_NO_DH
590         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
591         *auth |= SSL_aDH;
592 #endif
593 #ifdef OPENSSL_NO_KRB5
594         *mkey |= SSL_kKRB5;
595         *auth |= SSL_aKRB5;
596 #endif
597 #ifdef OPENSSL_NO_ECDSA
598         *auth |= SSL_aECDSA;
599 #endif
600 #ifdef OPENSSL_NO_ECDH
601         *mkey |= SSL_kECDHe|SSL_kECDHr;
602         *auth |= SSL_aECDH;
603 #endif
604 #ifdef OPENSSL_NO_PSK
605         *mkey |= SSL_kPSK;
606         *auth |= SSL_aPSK;
607 #endif
608 #ifdef SSL_FORBID_ENULL
609         *enc |= SSL_eNULL;
610 #endif
611
612         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
613         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
614         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
615         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
616         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
617         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
618         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
619         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
620         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
621         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
622         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
623
624         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
625         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
626         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
627         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
628
629         }
630
631 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
632                 int num_of_ciphers,
633                 unsigned long disabled_mkey, unsigned long disabled_auth,
634                 unsigned long disabled_enc, unsigned long disabled_mac,
635                 unsigned long disabled_ssl,
636                 CIPHER_ORDER *co_list,
637                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
638         {
639         int i, co_list_num;
640         SSL_CIPHER *c;
641
642         /*
643          * We have num_of_ciphers descriptions compiled in, depending on the
644          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
645          * These will later be sorted in a linked list with at most num
646          * entries.
647          */
648
649         /* Get the initial list of ciphers */
650         co_list_num = 0;        /* actual count of ciphers */
651         for (i = 0; i < num_of_ciphers; i++)
652                 {
653                 c = ssl_method->get_cipher(i);
654                 /* drop those that use any of that is not available */
655                 if ((c != NULL) && c->valid &&
656                     !(c->algorithm_mkey & disabled_mkey) &&
657                     !(c->algorithm_auth & disabled_auth) &&
658                     !(c->algorithm_enc & disabled_enc) &&
659                     !(c->algorithm_mac & disabled_mac) &&
660                     !(c->algorithm_ssl & disabled_ssl))
661                         {
662                         co_list[co_list_num].cipher = c;
663                         co_list[co_list_num].next = NULL;
664                         co_list[co_list_num].prev = NULL;
665                         co_list[co_list_num].active = 0;
666                         co_list_num++;
667 #ifdef KSSL_DEBUG
668                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
669 #endif  /* KSSL_DEBUG */
670                         /*
671                         if (!sk_push(ca_list,(char *)c)) goto err;
672                         */
673                         }
674                 }
675
676         /*
677          * Prepare linked list from list entries
678          */     
679         if (co_list_num > 0)
680                 {
681                 co_list[0].prev = NULL;
682
683                 if (co_list_num > 1)
684                         {
685                         co_list[0].next = &co_list[1];
686                         
687                         for (i = 1; i < co_list_num - 1; i++)
688                                 {
689                                 co_list[i].prev = &co_list[i - 1];
690                                 co_list[i].next = &co_list[i + 1];
691                                 }
692
693                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
694                         }
695                 
696                 co_list[co_list_num - 1].next = NULL;
697
698                 *head_p = &co_list[0];
699                 *tail_p = &co_list[co_list_num - 1];
700                 }
701         }
702
703 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
704                         int num_of_group_aliases,
705                         unsigned long disabled_mkey, unsigned long disabled_auth,
706                         unsigned long disabled_enc, unsigned long disabled_mac,
707                         unsigned long disabled_ssl,
708                         CIPHER_ORDER *head)
709         {
710         CIPHER_ORDER *ciph_curr;
711         SSL_CIPHER **ca_curr;
712         int i;
713         unsigned long mask_mkey = ~disabled_mkey;
714         unsigned long mask_auth = ~disabled_auth;
715         unsigned long mask_enc = ~disabled_enc;
716         unsigned long mask_mac = ~disabled_mac;
717         unsigned long mask_ssl = ~disabled_ssl;
718
719         /*
720          * First, add the real ciphers as already collected
721          */
722         ciph_curr = head;
723         ca_curr = ca_list;
724         while (ciph_curr != NULL)
725                 {
726                 *ca_curr = ciph_curr->cipher;
727                 ca_curr++;
728                 ciph_curr = ciph_curr->next;
729                 }
730
731         /*
732          * Now we add the available ones from the cipher_aliases[] table.
733          * They represent either one or more algorithms, some of which
734          * in any affected category must be supported (set in enabled_mask),
735          * or represent a cipher strength value (will be added in any case because algorithms=0).
736          */
737         for (i = 0; i < num_of_group_aliases; i++)
738                 {
739                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
740                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
741                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
742                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
743                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
744
745                 if (algorithm_mkey)
746                         if ((algorithm_mkey & mask_mkey) == 0)
747                                 continue;
748         
749                 if (algorithm_auth)
750                         if ((algorithm_auth & mask_auth) == 0)
751                                 continue;
752                 
753                 if (algorithm_enc)
754                         if ((algorithm_enc & mask_enc) == 0)
755                                 continue;
756                 
757                 if (algorithm_mac)
758                         if ((algorithm_mac & mask_mac) == 0)
759                                 continue;
760                 
761                 if (algorithm_ssl)
762                         if ((algorithm_ssl & mask_ssl) == 0)
763                                 continue;
764                 
765                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
766                 ca_curr++;
767                 }
768
769         *ca_curr = NULL;        /* end of list */
770         }
771
772 static void ssl_cipher_apply_rule(unsigned long cipher_id,
773                 unsigned long alg_mkey, unsigned long alg_auth,
774                 unsigned long alg_enc, unsigned long alg_mac,
775                 unsigned long alg_ssl,
776                 unsigned long algo_strength,
777                 int rule, int strength_bits,
778                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
779         {
780         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
781         SSL_CIPHER *cp;
782         int reverse = 0;
783
784 #ifdef CIPHER_DEBUG
785         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
786                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
787 #endif
788
789         if (rule == CIPHER_DEL)
790                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
791
792         head = *head_p;
793         tail = *tail_p;
794
795         if (reverse)
796                 {
797                 curr = tail;
798                 last = head;
799                 }
800         else
801                 {
802                 curr = head;
803                 last = tail;
804                 }
805
806         curr2 = curr;
807         for (;;)
808                 {
809                 if ((curr == NULL) || (curr == last)) break;
810                 curr = curr2;
811                 curr2 = reverse ? curr->prev : curr->next;
812
813                 cp = curr->cipher;
814
815                 /*
816                  * Selection criteria is either the value of strength_bits
817                  * or the algorithms used.
818                  */
819                 if (strength_bits >= 0)
820                         {
821                         if (strength_bits != cp->strength_bits)
822                                 continue;
823                         }
824                 else
825                         {
826 #ifdef CIPHER_DEBUG
827                         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);
828 #endif
829
830                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
831                                 continue;
832                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
833                                 continue;
834                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
835                                 continue;
836                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
837                                 continue;
838                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
839                                 continue;
840                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
841                                 continue;
842                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
843                                 continue;
844                         }
845
846 #ifdef CIPHER_DEBUG
847                 printf("Action = %d\n", rule);
848 #endif
849
850                 /* add the cipher if it has not been added yet. */
851                 if (rule == CIPHER_ADD)
852                         {
853                         /* reverse == 0 */
854                         if (!curr->active)
855                                 {
856                                 ll_append_tail(&head, curr, &tail);
857                                 curr->active = 1;
858                                 }
859                         }
860                 /* Move the added cipher to this location */
861                 else if (rule == CIPHER_ORD)
862                         {
863                         /* reverse == 0 */
864                         if (curr->active)
865                                 {
866                                 ll_append_tail(&head, curr, &tail);
867                                 }
868                         }
869                 else if (rule == CIPHER_DEL)
870                         {
871                         /* reverse == 1 */
872                         if (curr->active)
873                                 {
874                                 /* most recently deleted ciphersuites get best positions
875                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
876                                  * works in reverse to maintain the order) */
877                                 ll_append_head(&head, curr, &tail);
878                                 curr->active = 0;
879                                 }
880                         }
881                 else if (rule == CIPHER_KILL)
882                         {
883                         /* reverse == 0 */
884                         if (head == curr)
885                                 head = curr->next;
886                         else
887                                 curr->prev->next = curr->next;
888                         if (tail == curr)
889                                 tail = curr->prev;
890                         curr->active = 0;
891                         if (curr->next != NULL)
892                                 curr->next->prev = curr->prev;
893                         if (curr->prev != NULL)
894                                 curr->prev->next = curr->next;
895                         curr->next = NULL;
896                         curr->prev = NULL;
897                         }
898                 }
899
900         *head_p = head;
901         *tail_p = tail;
902         }
903
904 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
905                                     CIPHER_ORDER **tail_p)
906         {
907         int max_strength_bits, i, *number_uses;
908         CIPHER_ORDER *curr;
909
910         /*
911          * This routine sorts the ciphers with descending strength. The sorting
912          * must keep the pre-sorted sequence, so we apply the normal sorting
913          * routine as '+' movement to the end of the list.
914          */
915         max_strength_bits = 0;
916         curr = *head_p;
917         while (curr != NULL)
918                 {
919                 if (curr->active &&
920                     (curr->cipher->strength_bits > max_strength_bits))
921                     max_strength_bits = curr->cipher->strength_bits;
922                 curr = curr->next;
923                 }
924
925         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
926         if (!number_uses)
927                 {
928                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
929                 return(0);
930                 }
931         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
932
933         /*
934          * Now find the strength_bits values actually used
935          */
936         curr = *head_p;
937         while (curr != NULL)
938                 {
939                 if (curr->active)
940                         number_uses[curr->cipher->strength_bits]++;
941                 curr = curr->next;
942                 }
943         /*
944          * Go through the list of used strength_bits values in descending
945          * order.
946          */
947         for (i = max_strength_bits; i >= 0; i--)
948                 if (number_uses[i] > 0)
949                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
950
951         OPENSSL_free(number_uses);
952         return(1);
953         }
954
955 static int ssl_cipher_process_rulestr(const char *rule_str,
956                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
957                 SSL_CIPHER **ca_list)
958         {
959         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
960         const char *l, *start, *buf;
961         int j, multi, found, rule, retval, ok, buflen;
962         unsigned long cipher_id = 0;
963         char ch;
964
965         retval = 1;
966         l = rule_str;
967         for (;;)
968                 {
969                 ch = *l;
970
971                 if (ch == '\0')
972                         break;          /* done */
973                 if (ch == '-')
974                         { rule = CIPHER_DEL; l++; }
975                 else if (ch == '+')
976                         { rule = CIPHER_ORD; l++; }
977                 else if (ch == '!')
978                         { rule = CIPHER_KILL; l++; }
979                 else if (ch == '@')
980                         { rule = CIPHER_SPECIAL; l++; }
981                 else
982                         { rule = CIPHER_ADD; }
983
984                 if (ITEM_SEP(ch))
985                         {
986                         l++;
987                         continue;
988                         }
989
990                 alg_mkey = 0;
991                 alg_auth = 0;
992                 alg_enc = 0;
993                 alg_mac = 0;
994                 alg_ssl = 0;
995                 algo_strength = 0;
996
997                 start=l;
998                 for (;;)
999                         {
1000                         ch = *l;
1001                         buf = l;
1002                         buflen = 0;
1003 #ifndef CHARSET_EBCDIC
1004                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1005                                 ((ch >= '0') && (ch <= '9')) ||
1006                                 ((ch >= 'a') && (ch <= 'z')) ||
1007                                  (ch == '-'))
1008 #else
1009                         while ( isalnum(ch) || (ch == '-'))
1010 #endif
1011                                  {
1012                                  ch = *(++l);
1013                                  buflen++;
1014                                  }
1015
1016                         if (buflen == 0)
1017                                 {
1018                                 /*
1019                                  * We hit something we cannot deal with,
1020                                  * it is no command or separator nor
1021                                  * alphanumeric, so we call this an error.
1022                                  */
1023                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1024                                        SSL_R_INVALID_COMMAND);
1025                                 retval = found = 0;
1026                                 l++;
1027                                 break;
1028                                 }
1029
1030                         if (rule == CIPHER_SPECIAL)
1031                                 {
1032                                 found = 0; /* unused -- avoid compiler warning */
1033                                 break;  /* special treatment */
1034                                 }
1035
1036                         /* check for multi-part specification */
1037                         if (ch == '+')
1038                                 {
1039                                 multi=1;
1040                                 l++;
1041                                 }
1042                         else
1043                                 multi=0;
1044
1045                         /*
1046                          * Now search for the cipher alias in the ca_list. Be careful
1047                          * with the strncmp, because the "buflen" limitation
1048                          * will make the rule "ADH:SOME" and the cipher
1049                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1050                          * So additionally check whether the cipher name found
1051                          * has the correct length. We can save a strlen() call:
1052                          * just checking for the '\0' at the right place is
1053                          * sufficient, we have to strncmp() anyway. (We cannot
1054                          * use strcmp(), because buf is not '\0' terminated.)
1055                          */
1056                         j = found = 0;
1057                         cipher_id = 0;
1058                         while (ca_list[j])
1059                                 {
1060                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1061                                     (ca_list[j]->name[buflen] == '\0'))
1062                                         {
1063                                         found = 1;
1064                                         break;
1065                                         }
1066                                 else
1067                                         j++;
1068                                 }
1069
1070                         if (!found)
1071                                 break;  /* ignore this entry */
1072
1073                         if (ca_list[j]->algorithm_mkey)
1074                                 {
1075                                 if (alg_mkey)
1076                                         {
1077                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1078                                         if (!alg_mkey) { found = 0; break; }
1079                                         }
1080                                 else
1081                                         alg_mkey = ca_list[j]->algorithm_mkey;
1082                                 }
1083
1084                         if (ca_list[j]->algorithm_auth)
1085                                 {
1086                                 if (alg_auth)
1087                                         {
1088                                         alg_auth &= ca_list[j]->algorithm_auth;
1089                                         if (!alg_auth) { found = 0; break; }
1090                                         }
1091                                 else
1092                                         alg_auth = ca_list[j]->algorithm_auth;
1093                                 }
1094                         
1095                         if (ca_list[j]->algorithm_enc)
1096                                 {
1097                                 if (alg_enc)
1098                                         {
1099                                         alg_enc &= ca_list[j]->algorithm_enc;
1100                                         if (!alg_enc) { found = 0; break; }
1101                                         }
1102                                 else
1103                                         alg_enc = ca_list[j]->algorithm_enc;
1104                                 }
1105                                                 
1106                         if (ca_list[j]->algorithm_mac)
1107                                 {
1108                                 if (alg_mac)
1109                                         {
1110                                         alg_mac &= ca_list[j]->algorithm_mac;
1111                                         if (!alg_mac) { found = 0; break; }
1112                                         }
1113                                 else
1114                                         alg_mac = ca_list[j]->algorithm_mac;
1115                                 }
1116                         
1117                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1118                                 {
1119                                 if (algo_strength & SSL_EXP_MASK)
1120                                         {
1121                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1122                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1123                                         }
1124                                 else
1125                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1126                                 }
1127
1128                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1129                                 {
1130                                 if (algo_strength & SSL_STRONG_MASK)
1131                                         {
1132                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1133                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1134                                         }
1135                                 else
1136                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1137                                 }
1138                         
1139                         if (ca_list[j]->valid)
1140                                 {
1141                                 /* explicit ciphersuite found; its protocol version
1142                                  * does not become part of the search pattern!*/
1143
1144                                 cipher_id = ca_list[j]->id;
1145                                 }
1146                         else
1147                                 {
1148                                 /* not an explicit ciphersuite; only in this case, the
1149                                  * protocol version is considered part of the search pattern */
1150
1151                                 if (ca_list[j]->algorithm_ssl)
1152                                         {
1153                                         if (alg_ssl)
1154                                                 {
1155                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1156                                                 if (!alg_ssl) { found = 0; break; }
1157                                                 }
1158                                         else
1159                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1160                                         }
1161                                 }
1162                         
1163                         if (!multi) break;
1164                         }
1165
1166                 /*
1167                  * Ok, we have the rule, now apply it
1168                  */
1169                 if (rule == CIPHER_SPECIAL)
1170                         {       /* special command */
1171                         ok = 0;
1172                         if ((buflen == 8) &&
1173                                 !strncmp(buf, "STRENGTH", 8))
1174                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1175                         else
1176                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1177                                         SSL_R_INVALID_COMMAND);
1178                         if (ok == 0)
1179                                 retval = 0;
1180                         /*
1181                          * We do not support any "multi" options
1182                          * together with "@", so throw away the
1183                          * rest of the command, if any left, until
1184                          * end or ':' is found.
1185                          */
1186                         while ((*l != '\0') && !ITEM_SEP(*l))
1187                                 l++;
1188                         }
1189                 else if (found)
1190                         {
1191                         ssl_cipher_apply_rule(cipher_id,
1192                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1193                                 rule, -1, head_p, tail_p);
1194                         }
1195                 else
1196                         {
1197                         while ((*l != '\0') && !ITEM_SEP(*l))
1198                                 l++;
1199                         }
1200                 if (*l == '\0') break; /* done */
1201                 }
1202
1203         return(retval);
1204         }
1205
1206 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1207                 STACK_OF(SSL_CIPHER) **cipher_list,
1208                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1209                 const char *rule_str)
1210         {
1211         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1212         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1213         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1214         const char *rule_p;
1215         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1216         SSL_CIPHER **ca_list = NULL;
1217
1218         /*
1219          * Return with error if nothing to do.
1220          */
1221         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1222                 return NULL;
1223
1224         /*
1225          * To reduce the work to do we only want to process the compiled
1226          * in algorithms, so we first get the mask of disabled ciphers.
1227          */
1228         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1229
1230         /*
1231          * Now we have to collect the available ciphers from the compiled
1232          * in ciphers. We cannot get more than the number compiled in, so
1233          * it is used for allocation.
1234          */
1235         num_of_ciphers = ssl_method->num_ciphers();
1236 #ifdef KSSL_DEBUG
1237         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1238 #endif    /* KSSL_DEBUG */
1239         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1240         if (co_list == NULL)
1241                 {
1242                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1243                 return(NULL);   /* Failure */
1244                 }
1245
1246         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1247                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1248                                    co_list, &head, &tail);
1249
1250
1251         /* Now arrange all ciphers by preference: */
1252
1253         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1254         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1255         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1256
1257         /* AES is our preferred symmetric cipher */
1258         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1259
1260         /* Temporarily enable everything else for sorting */
1261         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1262
1263         /* Low priority for MD5 */
1264         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1265
1266         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1267          * (For applications that allow them, they aren't too bad, but we prefer
1268          * authenticated ciphers.) */
1269         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1270
1271         /* Move ciphers without forward secrecy to the end */
1272         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1273         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1274         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1275         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1276         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1277
1278         /* RC4 is sort-of broken -- move the the end */
1279         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1280
1281         /* Now sort by symmetric encryption strength.  The above ordering remains
1282          * in force within each class */
1283         if (!ssl_cipher_strength_sort(&head, &tail))
1284                 {
1285                 OPENSSL_free(co_list);
1286                 return NULL;
1287                 }
1288
1289         /* Now disable everything (maintaining the ordering!) */
1290         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1291
1292
1293         /*
1294          * We also need cipher aliases for selecting based on the rule_str.
1295          * There might be two types of entries in the rule_str: 1) names
1296          * of ciphers themselves 2) aliases for groups of ciphers.
1297          * For 1) we need the available ciphers and for 2) the cipher
1298          * groups of cipher_aliases added together in one list (otherwise
1299          * we would be happy with just the cipher_aliases table).
1300          */
1301         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1302         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1303         ca_list =
1304                 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1305         if (ca_list == NULL)
1306                 {
1307                 OPENSSL_free(co_list);
1308                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1309                 return(NULL);   /* Failure */
1310                 }
1311         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1312                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1313                                    head);
1314
1315         /*
1316          * If the rule_string begins with DEFAULT, apply the default rule
1317          * before using the (possibly available) additional rules.
1318          */
1319         ok = 1;
1320         rule_p = rule_str;
1321         if (strncmp(rule_str,"DEFAULT",7) == 0)
1322                 {
1323                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1324                         &head, &tail, ca_list);
1325                 rule_p += 7;
1326                 if (*rule_p == ':')
1327                         rule_p++;
1328                 }
1329
1330         if (ok && (strlen(rule_p) > 0))
1331                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1332
1333         OPENSSL_free(ca_list);  /* Not needed anymore */
1334
1335         if (!ok)
1336                 {       /* Rule processing failure */
1337                 OPENSSL_free(co_list);
1338                 return(NULL);
1339                 }
1340         
1341         /*
1342          * Allocate new "cipherstack" for the result, return with error
1343          * if we cannot get one.
1344          */
1345         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1346                 {
1347                 OPENSSL_free(co_list);
1348                 return(NULL);
1349                 }
1350
1351         /*
1352          * The cipher selection for the list is done. The ciphers are added
1353          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1354          */
1355         for (curr = head; curr != NULL; curr = curr->next)
1356                 {
1357                 if (curr->active)
1358                         {
1359                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1360 #ifdef CIPHER_DEBUG
1361                         printf("<%s>\n",curr->cipher->name);
1362 #endif
1363                         }
1364                 }
1365         OPENSSL_free(co_list);  /* Not needed any longer */
1366
1367         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1368         if (tmp_cipher_list == NULL)
1369                 {
1370                 sk_SSL_CIPHER_free(cipherstack);
1371                 return NULL;
1372                 }
1373         if (*cipher_list != NULL)
1374                 sk_SSL_CIPHER_free(*cipher_list);
1375         *cipher_list = cipherstack;
1376         if (*cipher_list_by_id != NULL)
1377                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1378         *cipher_list_by_id = tmp_cipher_list;
1379         sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1380
1381         return(cipherstack);
1382         }
1383
1384 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1385         {
1386         int is_export,pkl,kl;
1387         const char *ver,*exp_str;
1388         const char *kx,*au,*enc,*mac;
1389         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2,alg_s;
1390 #ifdef KSSL_DEBUG
1391         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1392 #else
1393         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1394 #endif /* KSSL_DEBUG */
1395
1396         alg_mkey = cipher->algorithm_mkey;
1397         alg_auth = cipher->algorithm_auth;
1398         alg_enc = cipher->algorithm_enc;
1399         alg_mac = cipher->algorithm_mac;
1400         alg_ssl = cipher->algorithm_ssl;
1401
1402         alg_s=cipher->algo_strength;
1403         alg2=cipher->algorithm2;
1404
1405         is_export=SSL_C_IS_EXPORT(cipher);
1406         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1407         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1408         exp_str=is_export?" export":"";
1409         
1410         if (alg_ssl & SSL_SSLV2)
1411                 ver="SSLv2";
1412         else if (alg_ssl & SSL_SSLV3)
1413                 ver="SSLv3";
1414         else
1415                 ver="unknown";
1416
1417         switch (alg_mkey)
1418                 {
1419         case SSL_kRSA:
1420                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1421                 break;
1422         case SSL_kDHr:
1423                 kx="DH/RSA";
1424                 break;
1425         case SSL_kDHd:
1426                 kx="DH/DSS";
1427                 break;
1428         case SSL_kKRB5:
1429                 kx="KRB5";
1430                 break;
1431         case SSL_kEDH:
1432                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1433                 break;
1434         case SSL_kECDHr:
1435                 kx="ECDH/RSA";
1436                 break;
1437         case SSL_kECDHe:
1438                 kx="ECDH/ECDSA";
1439                 break;
1440         case SSL_kEECDH:
1441                 kx="ECDH";
1442                 break;
1443         case SSL_kPSK:
1444                 kx="PSK";
1445                 break;
1446         default:
1447                 kx="unknown";
1448                 }
1449
1450         switch (alg_auth)
1451                 {
1452         case SSL_aRSA:
1453                 au="RSA";
1454                 break;
1455         case SSL_aDSS:
1456                 au="DSS";
1457                 break;
1458         case SSL_aDH:
1459                 au="DH";
1460                 break;
1461         case SSL_aKRB5:
1462                 au="KRB5";
1463                 break;
1464         case SSL_aECDH:
1465                 au="ECDH";
1466                 break;
1467         case SSL_aNULL:
1468                 au="None";
1469                 break;
1470         case SSL_aECDSA:
1471                 au="ECDSA";
1472                 break;
1473         case SSL_aPSK:
1474                 au="PSK";
1475                 break;
1476         default:
1477                 au="unknown";
1478                 break;
1479                 }
1480
1481         switch (alg_enc)
1482                 {
1483         case SSL_DES:
1484                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1485                 break;
1486         case SSL_3DES:
1487                 enc="3DES(168)";
1488                 break;
1489         case SSL_RC4:
1490                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1491                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1492                 break;
1493         case SSL_RC2:
1494                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1495                 break;
1496         case SSL_IDEA:
1497                 enc="IDEA(128)";
1498                 break;
1499         case SSL_eNULL:
1500                 enc="None";
1501                 break;
1502         case SSL_AES128:
1503                 enc="AES(128)";
1504                 break;
1505         case SSL_AES256:
1506                 enc="AES(256)";
1507                 break;
1508         case SSL_CAMELLIA128:
1509                 enc="Camellia(128)";
1510                 break;
1511         case SSL_CAMELLIA256:
1512                 enc="Camellia(256)";
1513                 break;
1514         case SSL_SEED:
1515                 enc="SEED(128)";
1516                 break;
1517         default:
1518                 enc="unknown";
1519                 break;
1520                 }
1521
1522         switch (alg_mac)
1523                 {
1524         case SSL_MD5:
1525                 mac="MD5";
1526                 break;
1527         case SSL_SHA1:
1528                 mac="SHA1";
1529                 break;
1530         default:
1531                 mac="unknown";
1532                 break;
1533                 }
1534
1535         if (buf == NULL)
1536                 {
1537                 len=128;
1538                 buf=OPENSSL_malloc(len);
1539                 if (buf == NULL) return("OPENSSL_malloc Error");
1540                 }
1541         else if (len < 128)
1542                 return("Buffer too small");
1543
1544 #ifdef KSSL_DEBUG
1545         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1546 #else
1547         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1548 #endif /* KSSL_DEBUG */
1549         return(buf);
1550         }
1551
1552 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1553         {
1554         int i;
1555
1556         if (c == NULL) return("(NONE)");
1557         i=(int)(c->id>>24L);
1558         if (i == 3)
1559                 return("TLSv1/SSLv3");
1560         else if (i == 2)
1561                 return("SSLv2");
1562         else
1563                 return("unknown");
1564         }
1565
1566 /* return the actual cipher being used */
1567 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1568         {
1569         if (c != NULL)
1570                 return(c->name);
1571         return("(NONE)");
1572         }
1573
1574 /* number of bits for symmetric cipher */
1575 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1576         {
1577         int ret=0;
1578
1579         if (c != NULL)
1580                 {
1581                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1582                 ret = c->strength_bits;
1583                 }
1584         return(ret);
1585         }
1586
1587 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1588         {
1589         SSL_COMP *ctmp;
1590         int i,nn;
1591
1592         if ((n == 0) || (sk == NULL)) return(NULL);
1593         nn=sk_SSL_COMP_num(sk);
1594         for (i=0; i<nn; i++)
1595                 {
1596                 ctmp=sk_SSL_COMP_value(sk,i);
1597                 if (ctmp->id == n)
1598                         return(ctmp);
1599                 }
1600         return(NULL);
1601         }
1602
1603 #ifdef OPENSSL_NO_COMP
1604 void *SSL_COMP_get_compression_methods(void)
1605         {
1606         return NULL;
1607         }
1608 int SSL_COMP_add_compression_method(int id, void *cm)
1609         {
1610         return 1;
1611         }
1612
1613 const char *SSL_COMP_get_name(const void *comp)
1614         {
1615         return NULL;
1616         }
1617 #else
1618 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1619         {
1620         load_builtin_compressions();
1621         return(ssl_comp_methods);
1622         }
1623
1624 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1625         {
1626         SSL_COMP *comp;
1627
1628         if (cm == NULL || cm->type == NID_undef)
1629                 return 1;
1630
1631         /* According to draft-ietf-tls-compression-04.txt, the
1632            compression number ranges should be the following:
1633
1634            0 to 63:    methods defined by the IETF
1635            64 to 192:  external party methods assigned by IANA
1636            193 to 255: reserved for private use */
1637         if (id < 193 || id > 255)
1638                 {
1639                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1640                 return 0;
1641                 }
1642
1643         MemCheck_off();
1644         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1645         comp->id=id;
1646         comp->method=cm;
1647         load_builtin_compressions();
1648         if (ssl_comp_methods
1649                 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1650                 {
1651                 OPENSSL_free(comp);
1652                 MemCheck_on();
1653                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1654                 return(1);
1655                 }
1656         else if ((ssl_comp_methods == NULL)
1657                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1658                 {
1659                 OPENSSL_free(comp);
1660                 MemCheck_on();
1661                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1662                 return(1);
1663                 }
1664         else
1665                 {
1666                 MemCheck_on();
1667                 return(0);
1668                 }
1669         }
1670
1671 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1672         {
1673         if (comp)
1674                 return comp->name;
1675         return NULL;
1676         }
1677
1678 #endif