Implement FIPS_mode and FIPS_mode_set
[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 #ifndef OPENSSL_NO_COMP
146 #include <openssl/comp.h>
147 #endif
148 #ifndef OPENSSL_NO_ENGINE
149 #include <openssl/engine.h>
150 #endif
151 #include "ssl_locl.h"
152
153 #define SSL_ENC_DES_IDX         0
154 #define SSL_ENC_3DES_IDX        1
155 #define SSL_ENC_RC4_IDX         2
156 #define SSL_ENC_RC2_IDX         3
157 #define SSL_ENC_IDEA_IDX        4
158 #define SSL_ENC_NULL_IDX        5
159 #define SSL_ENC_AES128_IDX      6
160 #define SSL_ENC_AES256_IDX      7
161 #define SSL_ENC_CAMELLIA128_IDX 8
162 #define SSL_ENC_CAMELLIA256_IDX 9
163 #define SSL_ENC_GOST89_IDX      10
164 #define SSL_ENC_SEED_IDX        11
165 #define SSL_ENC_NUM_IDX         12
166
167
168 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
169         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
170         };
171
172 #define SSL_COMP_NULL_IDX       0
173 #define SSL_COMP_ZLIB_IDX       1
174 #define SSL_COMP_NUM_IDX        2
175
176 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
177
178 #define SSL_MD_MD5_IDX  0
179 #define SSL_MD_SHA1_IDX 1
180 #define SSL_MD_GOST94_IDX 2
181 #define SSL_MD_GOST89MAC_IDX 3
182 #define SSL_MD_SHA256_IDX 4
183 /*Constant SSL_MAX_DIGEST equal to size of digests array should be 
184  * defined in the
185  * ssl_locl.h */
186 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST 
187 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
188         NULL,NULL,NULL,NULL,NULL
189         };
190 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
191  * implementation is engine-provided, we'll fill it only if
192  * corresponding EVP_PKEY_METHOD is found 
193  */
194 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
195         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,EVP_PKEY_HMAC
196         };
197
198 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
199         0,0,0,0,0
200         };
201
202 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
203         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
204         SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256
205         };
206
207 #define CIPHER_ADD      1
208 #define CIPHER_KILL     2
209 #define CIPHER_DEL      3
210 #define CIPHER_ORD      4
211 #define CIPHER_SPECIAL  5
212
213 typedef struct cipher_order_st
214         {
215         const SSL_CIPHER *cipher;
216         int active;
217         int dead;
218         struct cipher_order_st *next,*prev;
219         } CIPHER_ORDER;
220
221 static const SSL_CIPHER cipher_aliases[]={
222         /* "ALL" doesn't include eNULL (must be specifically enabled) */
223         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
224         /* "COMPLEMENTOFALL" */
225         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
226
227         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
228         {0,SSL_TXT_CMPDEF,0,  SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
229
230         /* key exchange aliases
231          * (some of those using only a single bit here combine
232          * multiple key exchange algs according to the RFCs,
233          * e.g. kEDH combines DHE_DSS and DHE_RSA) */
234         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
235
236         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
237         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
238         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
239         {0,SSL_TXT_kEDH,0,    SSL_kEDH,  0,0,0,0,0,0,0,0},
240         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
241
242         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
243
244         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
245         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
246         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
247         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
248         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
249
250         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
251         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
252         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
253
254         /* server authentication aliases */
255         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
256         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
257         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
258         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
259         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
260         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
261         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
262         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
263         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
264         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
265         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
266         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
267         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
268
269         /* aliases combining key exchange and server authentication */
270         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
271         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
272         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
273         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
274         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
275         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
276         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
277         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
278         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
279
280
281         /* symmetric encryption aliases */
282         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
283         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
284         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
285         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
286         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
287         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
288         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
289         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128,0,0,0,0,0,0},
290         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256,0,0,0,0,0,0},
291         {0,SSL_TXT_AES,0,     0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0},
292         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
293         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
294         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
295
296         /* MAC aliases */       
297         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
298         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
299         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
300         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
301         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
302         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
303
304         /* protocol version aliases */
305         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
306         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
307         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
308
309         /* export flag */
310         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
311         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
312
313         /* strength classes */
314         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
315         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
316         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
317         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
318         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
319         /* FIPS 140-2 approved ciphersuite */
320         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
321         };
322 /* Search for public key algorithm with given name and 
323  * return its pkey_id if it is available. Otherwise return 0
324  */
325 #ifdef OPENSSL_NO_ENGINE
326
327 static int get_optional_pkey_id(const char *pkey_name)
328         {
329         const EVP_PKEY_ASN1_METHOD *ameth;
330         int pkey_id=0;
331         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
332         if (ameth) 
333                 {
334                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
335                 }               
336         return pkey_id;
337         }
338
339 #else
340
341 static int get_optional_pkey_id(const char *pkey_name)
342         {
343         const EVP_PKEY_ASN1_METHOD *ameth;
344         ENGINE *tmpeng = NULL;
345         int pkey_id=0;
346         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
347         if (ameth)
348                 {
349                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
350                 }
351         if (tmpeng) ENGINE_finish(tmpeng);
352         return pkey_id;
353         }
354
355 #endif
356
357 void ssl_load_ciphers(void)
358         {
359         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
360                 EVP_get_cipherbyname(SN_des_cbc);
361         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
362                 EVP_get_cipherbyname(SN_des_ede3_cbc);
363         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
364                 EVP_get_cipherbyname(SN_rc4);
365         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
366                 EVP_get_cipherbyname(SN_rc2_cbc);
367 #ifndef OPENSSL_NO_IDEA
368         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
369                 EVP_get_cipherbyname(SN_idea_cbc);
370 #else
371         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
372 #endif
373         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
374           EVP_get_cipherbyname(SN_aes_128_cbc);
375         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
376           EVP_get_cipherbyname(SN_aes_256_cbc);
377         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
378           EVP_get_cipherbyname(SN_camellia_128_cbc);
379         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
380           EVP_get_cipherbyname(SN_camellia_256_cbc);
381         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
382           EVP_get_cipherbyname(SN_gost89_cnt);
383         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
384           EVP_get_cipherbyname(SN_seed_cbc);
385
386         ssl_digest_methods[SSL_MD_MD5_IDX]=
387                 EVP_get_digestbyname(SN_md5);
388         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
389                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
390         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
391         ssl_digest_methods[SSL_MD_SHA1_IDX]=
392                 EVP_get_digestbyname(SN_sha1);
393         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
394                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
395         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
396         ssl_digest_methods[SSL_MD_GOST94_IDX]=
397                 EVP_get_digestbyname(SN_id_GostR3411_94);
398         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
399                 {       
400                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
401                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
402                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
403                 }
404         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
405                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
406                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
407                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
408                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
409                 }               
410
411         ssl_digest_methods[SSL_MD_SHA256_IDX]=
412                 EVP_get_digestbyname(SN_sha256);
413         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
414                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
415         }
416 #ifndef OPENSSL_NO_COMP
417
418 static int sk_comp_cmp(const SSL_COMP * const *a,
419                         const SSL_COMP * const *b)
420         {
421         return((*a)->id-(*b)->id);
422         }
423
424 static void load_builtin_compressions(void)
425         {
426         int got_write_lock = 0;
427
428         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
429         if (ssl_comp_methods == NULL)
430                 {
431                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
432                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
433                 got_write_lock = 1;
434                 
435                 if (ssl_comp_methods == NULL)
436                         {
437                         SSL_COMP *comp = NULL;
438
439                         MemCheck_off();
440                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
441                         if (ssl_comp_methods != NULL)
442                                 {
443                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
444                                 if (comp != NULL)
445                                         {
446                                         comp->method=COMP_zlib();
447                                         if (comp->method
448                                                 && comp->method->type == NID_undef)
449                                                 OPENSSL_free(comp);
450                                         else
451                                                 {
452                                                 comp->id=SSL_COMP_ZLIB_IDX;
453                                                 comp->name=comp->method->name;
454                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
455                                                 }
456                                         }
457                                 }
458                         MemCheck_on();
459                         }
460                 }
461         
462         if (got_write_lock)
463                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
464         else
465                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
466         }
467 #endif
468
469 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
470              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
471         {
472         int i;
473         const SSL_CIPHER *c;
474
475         c=s->cipher;
476         if (c == NULL) return(0);
477         if (comp != NULL)
478                 {
479                 SSL_COMP ctmp;
480 #ifndef OPENSSL_NO_COMP
481                 load_builtin_compressions();
482 #endif
483
484                 *comp=NULL;
485                 ctmp.id=s->compress_meth;
486                 if (ssl_comp_methods != NULL)
487                         {
488                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
489                         if (i >= 0)
490                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
491                         else
492                                 *comp=NULL;
493                         }
494                 }
495
496         if ((enc == NULL) || (md == NULL)) return(0);
497
498         switch (c->algorithm_enc)
499                 {
500         case SSL_DES:
501                 i=SSL_ENC_DES_IDX;
502                 break;
503         case SSL_3DES:
504                 i=SSL_ENC_3DES_IDX;
505                 break;
506         case SSL_RC4:
507                 i=SSL_ENC_RC4_IDX;
508                 break;
509         case SSL_RC2:
510                 i=SSL_ENC_RC2_IDX;
511                 break;
512         case SSL_IDEA:
513                 i=SSL_ENC_IDEA_IDX;
514                 break;
515         case SSL_eNULL:
516                 i=SSL_ENC_NULL_IDX;
517                 break;
518         case SSL_AES128:
519                 i=SSL_ENC_AES128_IDX;
520                 break;
521         case SSL_AES256:
522                 i=SSL_ENC_AES256_IDX;
523                 break;
524         case SSL_CAMELLIA128:
525                 i=SSL_ENC_CAMELLIA128_IDX;
526                 break;
527         case SSL_CAMELLIA256:
528                 i=SSL_ENC_CAMELLIA256_IDX;
529                 break;
530         case SSL_eGOST2814789CNT:
531                 i=SSL_ENC_GOST89_IDX;
532                 break;
533         case SSL_SEED:
534                 i=SSL_ENC_SEED_IDX;
535                 break;
536         default:
537                 i= -1;
538                 break;
539                 }
540
541         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
542                 *enc=NULL;
543         else
544                 {
545                 if (i == SSL_ENC_NULL_IDX)
546                         *enc=EVP_enc_null();
547                 else
548                         *enc=ssl_cipher_methods[i];
549                 }
550
551         switch (c->algorithm_mac)
552                 {
553         case SSL_MD5:
554                 i=SSL_MD_MD5_IDX;
555                 break;
556         case SSL_SHA1:
557                 i=SSL_MD_SHA1_IDX;
558                 break;
559         case SSL_SHA256:
560                 i=SSL_MD_SHA256_IDX;
561                 break;
562         case SSL_GOST94:
563                 i = SSL_MD_GOST94_IDX;
564                 break;
565         case SSL_GOST89MAC:
566                 i = SSL_MD_GOST89MAC_IDX;
567                 break;
568         default:
569                 i= -1;
570                 break;
571                 }
572         if ((i < 0) || (i > SSL_MD_NUM_IDX))
573         {
574                 *md=NULL; 
575                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
576                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
577
578         }
579         else
580         {
581                 *md=ssl_digest_methods[i];
582                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
583                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
584         }       
585
586         if ((*enc != NULL) && (*md != NULL) && (!mac_pkey_type||*mac_pkey_type != NID_undef))
587                 return(1);
588         else
589                 return(0);
590         }
591
592 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
593 {
594         if (idx <0||idx>=SSL_MD_NUM_IDX) 
595                 {
596                 return 0;
597                 }
598         *mask = ssl_handshake_digest_flag[idx];
599         if (*mask)
600                 *md = ssl_digest_methods[idx];
601         else
602                 *md = NULL;
603         return 1;
604 }
605
606 #define ITEM_SEP(a) \
607         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
608
609 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
610              CIPHER_ORDER **tail)
611         {
612         if (curr == *tail) return;
613         if (curr == *head)
614                 *head=curr->next;
615         if (curr->prev != NULL)
616                 curr->prev->next=curr->next;
617         if (curr->next != NULL)
618                 curr->next->prev=curr->prev;
619         (*tail)->next=curr;
620         curr->prev= *tail;
621         curr->next=NULL;
622         *tail=curr;
623         }
624
625 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
626              CIPHER_ORDER **tail)
627         {
628         if (curr == *head) return;
629         if (curr == *tail)
630                 *tail=curr->prev;
631         if (curr->next != NULL)
632                 curr->next->prev=curr->prev;
633         if (curr->prev != NULL)
634                 curr->prev->next=curr->next;
635         (*head)->prev=curr;
636         curr->next= *head;
637         curr->prev=NULL;
638         *head=curr;
639         }
640
641 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
642         {
643         *mkey = 0;
644         *auth = 0;
645         *enc = 0;
646         *mac = 0;
647         *ssl = 0;
648
649 #ifdef OPENSSL_NO_RSA
650         *mkey |= SSL_kRSA;
651         *auth |= SSL_aRSA;
652 #endif
653 #ifdef OPENSSL_NO_DSA
654         *auth |= SSL_aDSS;
655 #endif
656         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
657         *auth |= SSL_aDH;
658 #ifdef OPENSSL_NO_DH
659         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
660         *auth |= SSL_aDH;
661 #endif
662 #ifdef OPENSSL_NO_KRB5
663         *mkey |= SSL_kKRB5;
664         *auth |= SSL_aKRB5;
665 #endif
666 #ifdef OPENSSL_NO_ECDSA
667         *auth |= SSL_aECDSA;
668 #endif
669 #ifdef OPENSSL_NO_ECDH
670         *mkey |= SSL_kECDHe|SSL_kECDHr;
671         *auth |= SSL_aECDH;
672 #endif
673 #ifdef OPENSSL_NO_PSK
674         *mkey |= SSL_kPSK;
675         *auth |= SSL_aPSK;
676 #endif
677 #ifdef OPENSSL_NO_SRP
678         *mkey |= SSL_kSRP;
679 #endif
680         /* Check for presence of GOST 34.10 algorithms, and if they
681          * do not present, disable  appropriate auth and key exchange */
682         if (!get_optional_pkey_id("gost94")) {
683                 *auth |= SSL_aGOST94;
684         }
685         if (!get_optional_pkey_id("gost2001")) {
686                 *auth |= SSL_aGOST01;
687         }
688         /* Disable GOST key exchange if no GOST signature algs are available * */
689         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
690                 *mkey |= SSL_kGOST;
691         }       
692 #ifdef SSL_FORBID_ENULL
693         *enc |= SSL_eNULL;
694 #endif
695                 
696
697
698         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
699         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
700         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
701         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
702         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
703         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
704         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
705         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
706         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
707         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
708         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
709
710         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
711         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
712         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
713         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
714         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
715
716         }
717
718 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
719                 int num_of_ciphers,
720                 unsigned long disabled_mkey, unsigned long disabled_auth,
721                 unsigned long disabled_enc, unsigned long disabled_mac,
722                 unsigned long disabled_ssl,
723                 CIPHER_ORDER *co_list,
724                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
725         {
726         int i, co_list_num;
727         const SSL_CIPHER *c;
728
729         /*
730          * We have num_of_ciphers descriptions compiled in, depending on the
731          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
732          * These will later be sorted in a linked list with at most num
733          * entries.
734          */
735
736         /* Get the initial list of ciphers */
737         co_list_num = 0;        /* actual count of ciphers */
738         for (i = 0; i < num_of_ciphers; i++)
739                 {
740                 c = ssl_method->get_cipher(i);
741                 /* drop those that use any of that is not available */
742                 if ((c != NULL) && c->valid &&
743 #ifdef OPENSSL_FIPS
744                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
745 #endif
746                     !(c->algorithm_mkey & disabled_mkey) &&
747                     !(c->algorithm_auth & disabled_auth) &&
748                     !(c->algorithm_enc & disabled_enc) &&
749                     !(c->algorithm_mac & disabled_mac) &&
750                     !(c->algorithm_ssl & disabled_ssl))
751                         {
752                         co_list[co_list_num].cipher = c;
753                         co_list[co_list_num].next = NULL;
754                         co_list[co_list_num].prev = NULL;
755                         co_list[co_list_num].active = 0;
756                         co_list_num++;
757 #ifdef KSSL_DEBUG
758                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
759 #endif  /* KSSL_DEBUG */
760                         /*
761                         if (!sk_push(ca_list,(char *)c)) goto err;
762                         */
763                         }
764                 }
765
766         /*
767          * Prepare linked list from list entries
768          */     
769         if (co_list_num > 0)
770                 {
771                 co_list[0].prev = NULL;
772
773                 if (co_list_num > 1)
774                         {
775                         co_list[0].next = &co_list[1];
776                         
777                         for (i = 1; i < co_list_num - 1; i++)
778                                 {
779                                 co_list[i].prev = &co_list[i - 1];
780                                 co_list[i].next = &co_list[i + 1];
781                                 }
782
783                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
784                         }
785                 
786                 co_list[co_list_num - 1].next = NULL;
787
788                 *head_p = &co_list[0];
789                 *tail_p = &co_list[co_list_num - 1];
790                 }
791         }
792
793 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
794                         int num_of_group_aliases,
795                         unsigned long disabled_mkey, unsigned long disabled_auth,
796                         unsigned long disabled_enc, unsigned long disabled_mac,
797                         unsigned long disabled_ssl,
798                         CIPHER_ORDER *head)
799         {
800         CIPHER_ORDER *ciph_curr;
801         const SSL_CIPHER **ca_curr;
802         int i;
803         unsigned long mask_mkey = ~disabled_mkey;
804         unsigned long mask_auth = ~disabled_auth;
805         unsigned long mask_enc = ~disabled_enc;
806         unsigned long mask_mac = ~disabled_mac;
807         unsigned long mask_ssl = ~disabled_ssl;
808
809         /*
810          * First, add the real ciphers as already collected
811          */
812         ciph_curr = head;
813         ca_curr = ca_list;
814         while (ciph_curr != NULL)
815                 {
816                 *ca_curr = ciph_curr->cipher;
817                 ca_curr++;
818                 ciph_curr = ciph_curr->next;
819                 }
820
821         /*
822          * Now we add the available ones from the cipher_aliases[] table.
823          * They represent either one or more algorithms, some of which
824          * in any affected category must be supported (set in enabled_mask),
825          * or represent a cipher strength value (will be added in any case because algorithms=0).
826          */
827         for (i = 0; i < num_of_group_aliases; i++)
828                 {
829                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
830                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
831                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
832                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
833                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
834
835                 if (algorithm_mkey)
836                         if ((algorithm_mkey & mask_mkey) == 0)
837                                 continue;
838         
839                 if (algorithm_auth)
840                         if ((algorithm_auth & mask_auth) == 0)
841                                 continue;
842                 
843                 if (algorithm_enc)
844                         if ((algorithm_enc & mask_enc) == 0)
845                                 continue;
846                 
847                 if (algorithm_mac)
848                         if ((algorithm_mac & mask_mac) == 0)
849                                 continue;
850                 
851                 if (algorithm_ssl)
852                         if ((algorithm_ssl & mask_ssl) == 0)
853                                 continue;
854                 
855                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
856                 ca_curr++;
857                 }
858
859         *ca_curr = NULL;        /* end of list */
860         }
861
862 static void ssl_cipher_apply_rule(unsigned long cipher_id,
863                 unsigned long alg_mkey, unsigned long alg_auth,
864                 unsigned long alg_enc, unsigned long alg_mac,
865                 unsigned long alg_ssl,
866                 unsigned long algo_strength,
867                 int rule, int strength_bits,
868                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
869         {
870         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
871         const SSL_CIPHER *cp;
872         int reverse = 0;
873
874 #ifdef CIPHER_DEBUG
875         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
876                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
877 #endif
878
879         if (rule == CIPHER_DEL)
880                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
881
882         head = *head_p;
883         tail = *tail_p;
884
885         if (reverse)
886                 {
887                 curr = tail;
888                 last = head;
889                 }
890         else
891                 {
892                 curr = head;
893                 last = tail;
894                 }
895
896         curr2 = curr;
897         for (;;)
898                 {
899                 if ((curr == NULL) || (curr == last)) break;
900                 curr = curr2;
901                 curr2 = reverse ? curr->prev : curr->next;
902
903                 cp = curr->cipher;
904
905                 /*
906                  * Selection criteria is either the value of strength_bits
907                  * or the algorithms used.
908                  */
909                 if (strength_bits >= 0)
910                         {
911                         if (strength_bits != cp->strength_bits)
912                                 continue;
913                         }
914                 else
915                         {
916 #ifdef CIPHER_DEBUG
917                         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);
918 #endif
919
920                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
921                                 continue;
922                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
923                                 continue;
924                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
925                                 continue;
926                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
927                                 continue;
928                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
929                                 continue;
930                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
931                                 continue;
932                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
933                                 continue;
934                         }
935
936 #ifdef CIPHER_DEBUG
937                 printf("Action = %d\n", rule);
938 #endif
939
940                 /* add the cipher if it has not been added yet. */
941                 if (rule == CIPHER_ADD)
942                         {
943                         /* reverse == 0 */
944                         if (!curr->active)
945                                 {
946                                 ll_append_tail(&head, curr, &tail);
947                                 curr->active = 1;
948                                 }
949                         }
950                 /* Move the added cipher to this location */
951                 else if (rule == CIPHER_ORD)
952                         {
953                         /* reverse == 0 */
954                         if (curr->active)
955                                 {
956                                 ll_append_tail(&head, curr, &tail);
957                                 }
958                         }
959                 else if (rule == CIPHER_DEL)
960                         {
961                         /* reverse == 1 */
962                         if (curr->active)
963                                 {
964                                 /* most recently deleted ciphersuites get best positions
965                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
966                                  * works in reverse to maintain the order) */
967                                 ll_append_head(&head, curr, &tail);
968                                 curr->active = 0;
969                                 }
970                         }
971                 else if (rule == CIPHER_KILL)
972                         {
973                         /* reverse == 0 */
974                         if (head == curr)
975                                 head = curr->next;
976                         else
977                                 curr->prev->next = curr->next;
978                         if (tail == curr)
979                                 tail = curr->prev;
980                         curr->active = 0;
981                         if (curr->next != NULL)
982                                 curr->next->prev = curr->prev;
983                         if (curr->prev != NULL)
984                                 curr->prev->next = curr->next;
985                         curr->next = NULL;
986                         curr->prev = NULL;
987                         }
988                 }
989
990         *head_p = head;
991         *tail_p = tail;
992         }
993
994 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
995                                     CIPHER_ORDER **tail_p)
996         {
997         int max_strength_bits, i, *number_uses;
998         CIPHER_ORDER *curr;
999
1000         /*
1001          * This routine sorts the ciphers with descending strength. The sorting
1002          * must keep the pre-sorted sequence, so we apply the normal sorting
1003          * routine as '+' movement to the end of the list.
1004          */
1005         max_strength_bits = 0;
1006         curr = *head_p;
1007         while (curr != NULL)
1008                 {
1009                 if (curr->active &&
1010                     (curr->cipher->strength_bits > max_strength_bits))
1011                     max_strength_bits = curr->cipher->strength_bits;
1012                 curr = curr->next;
1013                 }
1014
1015         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1016         if (!number_uses)
1017                 {
1018                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1019                 return(0);
1020                 }
1021         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1022
1023         /*
1024          * Now find the strength_bits values actually used
1025          */
1026         curr = *head_p;
1027         while (curr != NULL)
1028                 {
1029                 if (curr->active)
1030                         number_uses[curr->cipher->strength_bits]++;
1031                 curr = curr->next;
1032                 }
1033         /*
1034          * Go through the list of used strength_bits values in descending
1035          * order.
1036          */
1037         for (i = max_strength_bits; i >= 0; i--)
1038                 if (number_uses[i] > 0)
1039                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1040
1041         OPENSSL_free(number_uses);
1042         return(1);
1043         }
1044
1045 static int ssl_cipher_process_rulestr(const char *rule_str,
1046                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1047                 const SSL_CIPHER **ca_list)
1048         {
1049         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1050         const char *l, *buf;
1051         int j, multi, found, rule, retval, ok, buflen;
1052         unsigned long cipher_id = 0;
1053         char ch;
1054
1055         retval = 1;
1056         l = rule_str;
1057         for (;;)
1058                 {
1059                 ch = *l;
1060
1061                 if (ch == '\0')
1062                         break;          /* done */
1063                 if (ch == '-')
1064                         { rule = CIPHER_DEL; l++; }
1065                 else if (ch == '+')
1066                         { rule = CIPHER_ORD; l++; }
1067                 else if (ch == '!')
1068                         { rule = CIPHER_KILL; l++; }
1069                 else if (ch == '@')
1070                         { rule = CIPHER_SPECIAL; l++; }
1071                 else
1072                         { rule = CIPHER_ADD; }
1073
1074                 if (ITEM_SEP(ch))
1075                         {
1076                         l++;
1077                         continue;
1078                         }
1079
1080                 alg_mkey = 0;
1081                 alg_auth = 0;
1082                 alg_enc = 0;
1083                 alg_mac = 0;
1084                 alg_ssl = 0;
1085                 algo_strength = 0;
1086
1087                 for (;;)
1088                         {
1089                         ch = *l;
1090                         buf = l;
1091                         buflen = 0;
1092 #ifndef CHARSET_EBCDIC
1093                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1094                                 ((ch >= '0') && (ch <= '9')) ||
1095                                 ((ch >= 'a') && (ch <= 'z')) ||
1096                                  (ch == '-'))
1097 #else
1098                         while ( isalnum(ch) || (ch == '-'))
1099 #endif
1100                                  {
1101                                  ch = *(++l);
1102                                  buflen++;
1103                                  }
1104
1105                         if (buflen == 0)
1106                                 {
1107                                 /*
1108                                  * We hit something we cannot deal with,
1109                                  * it is no command or separator nor
1110                                  * alphanumeric, so we call this an error.
1111                                  */
1112                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1113                                        SSL_R_INVALID_COMMAND);
1114                                 retval = found = 0;
1115                                 l++;
1116                                 break;
1117                                 }
1118
1119                         if (rule == CIPHER_SPECIAL)
1120                                 {
1121                                 found = 0; /* unused -- avoid compiler warning */
1122                                 break;  /* special treatment */
1123                                 }
1124
1125                         /* check for multi-part specification */
1126                         if (ch == '+')
1127                                 {
1128                                 multi=1;
1129                                 l++;
1130                                 }
1131                         else
1132                                 multi=0;
1133
1134                         /*
1135                          * Now search for the cipher alias in the ca_list. Be careful
1136                          * with the strncmp, because the "buflen" limitation
1137                          * will make the rule "ADH:SOME" and the cipher
1138                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1139                          * So additionally check whether the cipher name found
1140                          * has the correct length. We can save a strlen() call:
1141                          * just checking for the '\0' at the right place is
1142                          * sufficient, we have to strncmp() anyway. (We cannot
1143                          * use strcmp(), because buf is not '\0' terminated.)
1144                          */
1145                         j = found = 0;
1146                         cipher_id = 0;
1147                         while (ca_list[j])
1148                                 {
1149                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1150                                     (ca_list[j]->name[buflen] == '\0'))
1151                                         {
1152                                         found = 1;
1153                                         break;
1154                                         }
1155                                 else
1156                                         j++;
1157                                 }
1158
1159                         if (!found)
1160                                 break;  /* ignore this entry */
1161
1162                         if (ca_list[j]->algorithm_mkey)
1163                                 {
1164                                 if (alg_mkey)
1165                                         {
1166                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1167                                         if (!alg_mkey) { found = 0; break; }
1168                                         }
1169                                 else
1170                                         alg_mkey = ca_list[j]->algorithm_mkey;
1171                                 }
1172
1173                         if (ca_list[j]->algorithm_auth)
1174                                 {
1175                                 if (alg_auth)
1176                                         {
1177                                         alg_auth &= ca_list[j]->algorithm_auth;
1178                                         if (!alg_auth) { found = 0; break; }
1179                                         }
1180                                 else
1181                                         alg_auth = ca_list[j]->algorithm_auth;
1182                                 }
1183                         
1184                         if (ca_list[j]->algorithm_enc)
1185                                 {
1186                                 if (alg_enc)
1187                                         {
1188                                         alg_enc &= ca_list[j]->algorithm_enc;
1189                                         if (!alg_enc) { found = 0; break; }
1190                                         }
1191                                 else
1192                                         alg_enc = ca_list[j]->algorithm_enc;
1193                                 }
1194                                                 
1195                         if (ca_list[j]->algorithm_mac)
1196                                 {
1197                                 if (alg_mac)
1198                                         {
1199                                         alg_mac &= ca_list[j]->algorithm_mac;
1200                                         if (!alg_mac) { found = 0; break; }
1201                                         }
1202                                 else
1203                                         alg_mac = ca_list[j]->algorithm_mac;
1204                                 }
1205                         
1206                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1207                                 {
1208                                 if (algo_strength & SSL_EXP_MASK)
1209                                         {
1210                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1211                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1212                                         }
1213                                 else
1214                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1215                                 }
1216
1217                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1218                                 {
1219                                 if (algo_strength & SSL_STRONG_MASK)
1220                                         {
1221                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1222                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1223                                         }
1224                                 else
1225                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1226                                 }
1227                         
1228                         if (ca_list[j]->valid)
1229                                 {
1230                                 /* explicit ciphersuite found; its protocol version
1231                                  * does not become part of the search pattern!*/
1232
1233                                 cipher_id = ca_list[j]->id;
1234                                 }
1235                         else
1236                                 {
1237                                 /* not an explicit ciphersuite; only in this case, the
1238                                  * protocol version is considered part of the search pattern */
1239
1240                                 if (ca_list[j]->algorithm_ssl)
1241                                         {
1242                                         if (alg_ssl)
1243                                                 {
1244                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1245                                                 if (!alg_ssl) { found = 0; break; }
1246                                                 }
1247                                         else
1248                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1249                                         }
1250                                 }
1251                         
1252                         if (!multi) break;
1253                         }
1254
1255                 /*
1256                  * Ok, we have the rule, now apply it
1257                  */
1258                 if (rule == CIPHER_SPECIAL)
1259                         {       /* special command */
1260                         ok = 0;
1261                         if ((buflen == 8) &&
1262                                 !strncmp(buf, "STRENGTH", 8))
1263                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1264                         else
1265                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1266                                         SSL_R_INVALID_COMMAND);
1267                         if (ok == 0)
1268                                 retval = 0;
1269                         /*
1270                          * We do not support any "multi" options
1271                          * together with "@", so throw away the
1272                          * rest of the command, if any left, until
1273                          * end or ':' is found.
1274                          */
1275                         while ((*l != '\0') && !ITEM_SEP(*l))
1276                                 l++;
1277                         }
1278                 else if (found)
1279                         {
1280                         ssl_cipher_apply_rule(cipher_id,
1281                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1282                                 rule, -1, head_p, tail_p);
1283                         }
1284                 else
1285                         {
1286                         while ((*l != '\0') && !ITEM_SEP(*l))
1287                                 l++;
1288                         }
1289                 if (*l == '\0') break; /* done */
1290                 }
1291
1292         return(retval);
1293         }
1294
1295 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1296                 STACK_OF(SSL_CIPHER) **cipher_list,
1297                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1298                 const char *rule_str)
1299         {
1300         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1301         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1302         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1303         const char *rule_p;
1304         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1305         const SSL_CIPHER **ca_list = NULL;
1306
1307         /*
1308          * Return with error if nothing to do.
1309          */
1310         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1311                 return NULL;
1312
1313         /*
1314          * To reduce the work to do we only want to process the compiled
1315          * in algorithms, so we first get the mask of disabled ciphers.
1316          */
1317         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1318
1319         /*
1320          * Now we have to collect the available ciphers from the compiled
1321          * in ciphers. We cannot get more than the number compiled in, so
1322          * it is used for allocation.
1323          */
1324         num_of_ciphers = ssl_method->num_ciphers();
1325 #ifdef KSSL_DEBUG
1326         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1327 #endif    /* KSSL_DEBUG */
1328         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1329         if (co_list == NULL)
1330                 {
1331                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1332                 return(NULL);   /* Failure */
1333                 }
1334
1335         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1336                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1337                                    co_list, &head, &tail);
1338
1339
1340         /* Now arrange all ciphers by preference: */
1341
1342         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1343         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1344         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1345
1346         /* AES is our preferred symmetric cipher */
1347         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1348
1349         /* Temporarily enable everything else for sorting */
1350         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1351
1352         /* Low priority for MD5 */
1353         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1354
1355         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1356          * (For applications that allow them, they aren't too bad, but we prefer
1357          * authenticated ciphers.) */
1358         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1359
1360         /* Move ciphers without forward secrecy to the end */
1361         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1362         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1363         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1364         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1365         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1366
1367         /* RC4 is sort-of broken -- move the the end */
1368         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1369
1370         /* Now sort by symmetric encryption strength.  The above ordering remains
1371          * in force within each class */
1372         if (!ssl_cipher_strength_sort(&head, &tail))
1373                 {
1374                 OPENSSL_free(co_list);
1375                 return NULL;
1376                 }
1377
1378         /* Now disable everything (maintaining the ordering!) */
1379         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1380
1381
1382         /*
1383          * We also need cipher aliases for selecting based on the rule_str.
1384          * There might be two types of entries in the rule_str: 1) names
1385          * of ciphers themselves 2) aliases for groups of ciphers.
1386          * For 1) we need the available ciphers and for 2) the cipher
1387          * groups of cipher_aliases added together in one list (otherwise
1388          * we would be happy with just the cipher_aliases table).
1389          */
1390         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1391         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1392         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1393         if (ca_list == NULL)
1394                 {
1395                 OPENSSL_free(co_list);
1396                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1397                 return(NULL);   /* Failure */
1398                 }
1399         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1400                                    disabled_mkey, disabled_auth, disabled_enc,
1401                                    disabled_mac, disabled_ssl, head);
1402
1403         /*
1404          * If the rule_string begins with DEFAULT, apply the default rule
1405          * before using the (possibly available) additional rules.
1406          */
1407         ok = 1;
1408         rule_p = rule_str;
1409         if (strncmp(rule_str,"DEFAULT",7) == 0)
1410                 {
1411                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1412                         &head, &tail, ca_list);
1413                 rule_p += 7;
1414                 if (*rule_p == ':')
1415                         rule_p++;
1416                 }
1417
1418         if (ok && (strlen(rule_p) > 0))
1419                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1420
1421         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1422
1423         if (!ok)
1424                 {       /* Rule processing failure */
1425                 OPENSSL_free(co_list);
1426                 return(NULL);
1427                 }
1428         
1429         /*
1430          * Allocate new "cipherstack" for the result, return with error
1431          * if we cannot get one.
1432          */
1433         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1434                 {
1435                 OPENSSL_free(co_list);
1436                 return(NULL);
1437                 }
1438
1439         /*
1440          * The cipher selection for the list is done. The ciphers are added
1441          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1442          */
1443         for (curr = head; curr != NULL; curr = curr->next)
1444                 {
1445 #ifdef OPENSSL_FIPS
1446                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1447 #else
1448                 if (curr->active)
1449 #endif
1450                         {
1451                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1452 #ifdef CIPHER_DEBUG
1453                         printf("<%s>\n",curr->cipher->name);
1454 #endif
1455                         }
1456                 }
1457         OPENSSL_free(co_list);  /* Not needed any longer */
1458
1459         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1460         if (tmp_cipher_list == NULL)
1461                 {
1462                 sk_SSL_CIPHER_free(cipherstack);
1463                 return NULL;
1464                 }
1465         if (*cipher_list != NULL)
1466                 sk_SSL_CIPHER_free(*cipher_list);
1467         *cipher_list = cipherstack;
1468         if (*cipher_list_by_id != NULL)
1469                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1470         *cipher_list_by_id = tmp_cipher_list;
1471         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1472
1473         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1474         return(cipherstack);
1475         }
1476
1477 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1478         {
1479         int is_export,pkl,kl;
1480         const char *ver,*exp_str;
1481         const char *kx,*au,*enc,*mac;
1482         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1483 #ifdef KSSL_DEBUG
1484         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1485 #else
1486         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1487 #endif /* KSSL_DEBUG */
1488
1489         alg_mkey = cipher->algorithm_mkey;
1490         alg_auth = cipher->algorithm_auth;
1491         alg_enc = cipher->algorithm_enc;
1492         alg_mac = cipher->algorithm_mac;
1493         alg_ssl = cipher->algorithm_ssl;
1494
1495         alg2=cipher->algorithm2;
1496
1497         is_export=SSL_C_IS_EXPORT(cipher);
1498         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1499         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1500         exp_str=is_export?" export":"";
1501         
1502         if (alg_ssl & SSL_SSLV2)
1503                 ver="SSLv2";
1504         else if (alg_ssl & SSL_SSLV3)
1505                 ver="SSLv3";
1506         else
1507                 ver="unknown";
1508
1509         switch (alg_mkey)
1510                 {
1511         case SSL_kRSA:
1512                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1513                 break;
1514         case SSL_kDHr:
1515                 kx="DH/RSA";
1516                 break;
1517         case SSL_kDHd:
1518                 kx="DH/DSS";
1519                 break;
1520         case SSL_kKRB5:
1521                 kx="KRB5";
1522                 break;
1523         case SSL_kEDH:
1524                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1525                 break;
1526         case SSL_kECDHr:
1527                 kx="ECDH/RSA";
1528                 break;
1529         case SSL_kECDHe:
1530                 kx="ECDH/ECDSA";
1531                 break;
1532         case SSL_kEECDH:
1533                 kx="ECDH";
1534                 break;
1535         case SSL_kPSK:
1536                 kx="PSK";
1537                 break;
1538         case SSL_kSRP:
1539                 kx="SRP";
1540                 break;
1541         default:
1542                 kx="unknown";
1543                 }
1544
1545         switch (alg_auth)
1546                 {
1547         case SSL_aRSA:
1548                 au="RSA";
1549                 break;
1550         case SSL_aDSS:
1551                 au="DSS";
1552                 break;
1553         case SSL_aDH:
1554                 au="DH";
1555                 break;
1556         case SSL_aKRB5:
1557                 au="KRB5";
1558                 break;
1559         case SSL_aECDH:
1560                 au="ECDH";
1561                 break;
1562         case SSL_aNULL:
1563                 au="None";
1564                 break;
1565         case SSL_aECDSA:
1566                 au="ECDSA";
1567                 break;
1568         case SSL_aPSK:
1569                 au="PSK";
1570                 break;
1571         default:
1572                 au="unknown";
1573                 break;
1574                 }
1575
1576         switch (alg_enc)
1577                 {
1578         case SSL_DES:
1579                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1580                 break;
1581         case SSL_3DES:
1582                 enc="3DES(168)";
1583                 break;
1584         case SSL_RC4:
1585                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1586                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1587                 break;
1588         case SSL_RC2:
1589                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1590                 break;
1591         case SSL_IDEA:
1592                 enc="IDEA(128)";
1593                 break;
1594         case SSL_eNULL:
1595                 enc="None";
1596                 break;
1597         case SSL_AES128:
1598                 enc="AES(128)";
1599                 break;
1600         case SSL_AES256:
1601                 enc="AES(256)";
1602                 break;
1603         case SSL_CAMELLIA128:
1604                 enc="Camellia(128)";
1605                 break;
1606         case SSL_CAMELLIA256:
1607                 enc="Camellia(256)";
1608                 break;
1609         case SSL_SEED:
1610                 enc="SEED(128)";
1611                 break;
1612         default:
1613                 enc="unknown";
1614                 break;
1615                 }
1616
1617         switch (alg_mac)
1618                 {
1619         case SSL_MD5:
1620                 mac="MD5";
1621                 break;
1622         case SSL_SHA1:
1623                 mac="SHA1";
1624                 break;
1625         case SSL_SHA256:
1626                 mac="SHA256";
1627                 break;
1628         default:
1629                 mac="unknown";
1630                 break;
1631                 }
1632
1633         if (buf == NULL)
1634                 {
1635                 len=128;
1636                 buf=OPENSSL_malloc(len);
1637                 if (buf == NULL) return("OPENSSL_malloc Error");
1638                 }
1639         else if (len < 128)
1640                 return("Buffer too small");
1641
1642 #ifdef KSSL_DEBUG
1643         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1644 #else
1645         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1646 #endif /* KSSL_DEBUG */
1647         return(buf);
1648         }
1649
1650 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1651         {
1652         int i;
1653
1654         if (c == NULL) return("(NONE)");
1655         i=(int)(c->id>>24L);
1656         if (i == 3)
1657                 return("TLSv1/SSLv3");
1658         else if (i == 2)
1659                 return("SSLv2");
1660         else
1661                 return("unknown");
1662         }
1663
1664 /* return the actual cipher being used */
1665 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1666         {
1667         if (c != NULL)
1668                 return(c->name);
1669         return("(NONE)");
1670         }
1671
1672 /* number of bits for symmetric cipher */
1673 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1674         {
1675         int ret=0;
1676
1677         if (c != NULL)
1678                 {
1679                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1680                 ret = c->strength_bits;
1681                 }
1682         return(ret);
1683         }
1684
1685 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1686         {
1687         return c->id;
1688         }
1689
1690 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1691         {
1692         SSL_COMP *ctmp;
1693         int i,nn;
1694
1695         if ((n == 0) || (sk == NULL)) return(NULL);
1696         nn=sk_SSL_COMP_num(sk);
1697         for (i=0; i<nn; i++)
1698                 {
1699                 ctmp=sk_SSL_COMP_value(sk,i);
1700                 if (ctmp->id == n)
1701                         return(ctmp);
1702                 }
1703         return(NULL);
1704         }
1705
1706 #ifdef OPENSSL_NO_COMP
1707 void *SSL_COMP_get_compression_methods(void)
1708         {
1709         return NULL;
1710         }
1711 int SSL_COMP_add_compression_method(int id, void *cm)
1712         {
1713         return 1;
1714         }
1715
1716 const char *SSL_COMP_get_name(const void *comp)
1717         {
1718         return NULL;
1719         }
1720 #else
1721 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1722         {
1723         load_builtin_compressions();
1724         return(ssl_comp_methods);
1725         }
1726
1727 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1728         {
1729         SSL_COMP *comp;
1730
1731         if (cm == NULL || cm->type == NID_undef)
1732                 return 1;
1733
1734         /* According to draft-ietf-tls-compression-04.txt, the
1735            compression number ranges should be the following:
1736
1737            0 to 63:    methods defined by the IETF
1738            64 to 192:  external party methods assigned by IANA
1739            193 to 255: reserved for private use */
1740         if (id < 193 || id > 255)
1741                 {
1742                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1743                 return 0;
1744                 }
1745
1746         MemCheck_off();
1747         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1748         comp->id=id;
1749         comp->method=cm;
1750         load_builtin_compressions();
1751         if (ssl_comp_methods
1752                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1753                 {
1754                 OPENSSL_free(comp);
1755                 MemCheck_on();
1756                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1757                 return(1);
1758                 }
1759         else if ((ssl_comp_methods == NULL)
1760                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1761                 {
1762                 OPENSSL_free(comp);
1763                 MemCheck_on();
1764                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1765                 return(1);
1766                 }
1767         else
1768                 {
1769                 MemCheck_on();
1770                 return(0);
1771                 }
1772         }
1773
1774 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1775         {
1776         if (comp)
1777                 return comp->name;
1778         return NULL;
1779         }
1780
1781 #endif