Remove some unnecessary OPENSSL_FIPS references
[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_AES128GCM_IDX   12
166 #define SSL_ENC_AES256GCM_IDX   13
167 #define SSL_ENC_NUM_IDX         14
168
169
170 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
171         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
172         };
173
174 #define SSL_COMP_NULL_IDX       0
175 #define SSL_COMP_ZLIB_IDX       1
176 #define SSL_COMP_NUM_IDX        2
177
178 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
179
180 #define SSL_MD_MD5_IDX  0
181 #define SSL_MD_SHA1_IDX 1
182 #define SSL_MD_GOST94_IDX 2
183 #define SSL_MD_GOST89MAC_IDX 3
184 #define SSL_MD_SHA256_IDX 4
185 #define SSL_MD_SHA384_IDX 5
186 /*Constant SSL_MAX_DIGEST equal to size of digests array should be 
187  * defined in the
188  * ssl_locl.h */
189 #define SSL_MD_NUM_IDX  SSL_MAX_DIGEST 
190 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
191         NULL,NULL,NULL,NULL,NULL,NULL
192         };
193 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
194  * implementation is engine-provided, we'll fill it only if
195  * corresponding EVP_PKEY_METHOD is found 
196  */
197 static int  ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
198         EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,
199         EVP_PKEY_HMAC,EVP_PKEY_HMAC
200         };
201
202 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
203         0,0,0,0,0,0
204         };
205
206 static const int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
207         SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
208         SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
209         SSL_HANDSHAKE_MAC_SHA384
210         };
211
212 #define CIPHER_ADD      1
213 #define CIPHER_KILL     2
214 #define CIPHER_DEL      3
215 #define CIPHER_ORD      4
216 #define CIPHER_SPECIAL  5
217
218 typedef struct cipher_order_st
219         {
220         const SSL_CIPHER *cipher;
221         int active;
222         int dead;
223         struct cipher_order_st *next,*prev;
224         } CIPHER_ORDER;
225
226 static const SSL_CIPHER cipher_aliases[]={
227         /* "ALL" doesn't include eNULL (must be specifically enabled) */
228         {0,SSL_TXT_ALL,0,     0,0,~SSL_eNULL,0,0,0,0,0,0},
229         /* "COMPLEMENTOFALL" */
230         {0,SSL_TXT_CMPALL,0,  0,0,SSL_eNULL,0,0,0,0,0,0},
231
232         /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
233         {0,SSL_TXT_CMPDEF,0,  SSL_kDHE|SSL_kECDHE,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
234
235         /* key exchange aliases
236          * (some of those using only a single bit here combine
237          * multiple key exchange algs according to the RFCs,
238          * e.g. kDHE combines DHE_DSS and DHE_RSA) */
239         {0,SSL_TXT_kRSA,0,    SSL_kRSA,  0,0,0,0,0,0,0,0},
240
241         {0,SSL_TXT_kDHr,0,    SSL_kDHr,  0,0,0,0,0,0,0,0},
242         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0},
243         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0},
244         {0,SSL_TXT_kEDH,0,    SSL_kDHE,  0,0,0,0,0,0,0,0},
245         {0,SSL_TXT_kDHE,0,    SSL_kDHE,  0,0,0,0,0,0,0,0},
246         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kDHE,0,0,0,0,0,0,0,0},
247
248         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
249
250         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
251         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
252         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
253         {0,SSL_TXT_kEECDH,0,  SSL_kECDHE,0,0,0,0,0,0,0,0},
254         {0,SSL_TXT_kECDHE,0,  SSL_kECDHE,0,0,0,0,0,0,0,0},
255         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kECDHE,0,0,0,0,0,0,0,0},
256
257         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
258         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
259         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
260
261         /* server authentication aliases */
262         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
263         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
264         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
265         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
266         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
267         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
268         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
269         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
270         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
271         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
272         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
273         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
274         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
275         {0,SSL_TXT_aSRP,0,    0,SSL_aSRP,  0,0,0,0,0,0,0},
276
277         /* aliases combining key exchange and server authentication */
278         {0,SSL_TXT_EDH,0,     SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
279         {0,SSL_TXT_DHE,0,     SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
280         {0,SSL_TXT_EECDH,0,   SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
281         {0,SSL_TXT_ECDHE,0,   SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
282         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
283         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
284         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
285         {0,SSL_TXT_ADH,0,     SSL_kDHE,SSL_aNULL,0,0,0,0,0,0,0},
286         {0,SSL_TXT_AECDH,0,   SSL_kECDHE,SSL_aNULL,0,0,0,0,0,0,0},
287         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
288         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
289
290
291         /* symmetric encryption aliases */
292         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
293         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
294         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
295         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
296         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
297         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
298         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
299         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
300         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
301         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
302         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
303         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
304         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
305         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
306
307         /* MAC aliases */       
308         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
309         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
310         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
311         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
312         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
313         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
314         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
315
316         /* protocol version aliases */
317         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
318         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
319         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
320
321         /* export flag */
322         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
323         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
324
325         /* strength classes */
326         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
327         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
328         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
329         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
330         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
331         /* FIPS 140-2 approved ciphersuite */
332         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
333
334         /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
335         {0,SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,0,
336          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
337         {0,SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,0,
338          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
339         {0,SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,0,
340          SSL_kDHE,SSL_aDSS,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
341         {0,SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,0,
342          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
343         {0,SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,0,
344          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
345         {0,SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,0,
346          SSL_kDHE,SSL_aRSA,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
347
348         };
349 /* Search for public key algorithm with given name and 
350  * return its pkey_id if it is available. Otherwise return 0
351  */
352 #ifdef OPENSSL_NO_ENGINE
353
354 static int get_optional_pkey_id(const char *pkey_name)
355         {
356         const EVP_PKEY_ASN1_METHOD *ameth;
357         int pkey_id=0;
358         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
359         if (ameth) 
360                 {
361                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
362                 }               
363         return pkey_id;
364         }
365
366 #else
367
368 static int get_optional_pkey_id(const char *pkey_name)
369         {
370         const EVP_PKEY_ASN1_METHOD *ameth;
371         ENGINE *tmpeng = NULL;
372         int pkey_id=0;
373         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
374         if (ameth)
375                 {
376                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
377                 }
378         if (tmpeng) ENGINE_finish(tmpeng);
379         return pkey_id;
380         }
381
382 #endif
383
384 void ssl_load_ciphers(void)
385         {
386         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
387                 EVP_get_cipherbyname(SN_des_cbc);
388         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
389                 EVP_get_cipherbyname(SN_des_ede3_cbc);
390         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
391                 EVP_get_cipherbyname(SN_rc4);
392         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
393                 EVP_get_cipherbyname(SN_rc2_cbc);
394 #ifndef OPENSSL_NO_IDEA
395         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
396                 EVP_get_cipherbyname(SN_idea_cbc);
397 #else
398         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
399 #endif
400         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
401           EVP_get_cipherbyname(SN_aes_128_cbc);
402         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
403           EVP_get_cipherbyname(SN_aes_256_cbc);
404         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
405           EVP_get_cipherbyname(SN_camellia_128_cbc);
406         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
407           EVP_get_cipherbyname(SN_camellia_256_cbc);
408         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
409           EVP_get_cipherbyname(SN_gost89_cnt);
410         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
411           EVP_get_cipherbyname(SN_seed_cbc);
412
413         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
414           EVP_get_cipherbyname(SN_aes_128_gcm);
415         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
416           EVP_get_cipherbyname(SN_aes_256_gcm);
417
418         ssl_digest_methods[SSL_MD_MD5_IDX]=
419                 EVP_get_digestbyname(SN_md5);
420         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
421                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
422         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
423         ssl_digest_methods[SSL_MD_SHA1_IDX]=
424                 EVP_get_digestbyname(SN_sha1);
425         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
426                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
427         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
428         ssl_digest_methods[SSL_MD_GOST94_IDX]=
429                 EVP_get_digestbyname(SN_id_GostR3411_94);
430         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
431                 {       
432                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
433                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
434                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
435                 }
436         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
437                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
438                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
439                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
440                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
441                 }               
442
443         ssl_digest_methods[SSL_MD_SHA256_IDX]=
444                 EVP_get_digestbyname(SN_sha256);
445         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
446                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
447         ssl_digest_methods[SSL_MD_SHA384_IDX]=
448                 EVP_get_digestbyname(SN_sha384);
449         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
450                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
451         }
452 #ifndef OPENSSL_NO_COMP
453
454 static int sk_comp_cmp(const SSL_COMP * const *a,
455                         const SSL_COMP * const *b)
456         {
457         return((*a)->id-(*b)->id);
458         }
459
460 static void load_builtin_compressions(void)
461         {
462         int got_write_lock = 0;
463
464         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
465         if (ssl_comp_methods == NULL)
466                 {
467                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
468                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
469                 got_write_lock = 1;
470                 
471                 if (ssl_comp_methods == NULL)
472                         {
473                         SSL_COMP *comp = NULL;
474
475                         MemCheck_off();
476                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
477                         if (ssl_comp_methods != NULL)
478                                 {
479                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
480                                 if (comp != NULL)
481                                         {
482                                         comp->method=COMP_zlib();
483                                         if (comp->method
484                                                 && comp->method->type == NID_undef)
485                                                 OPENSSL_free(comp);
486                                         else
487                                                 {
488                                                 comp->id=SSL_COMP_ZLIB_IDX;
489                                                 comp->name=comp->method->name;
490                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
491                                                 }
492                                         }
493                                         sk_SSL_COMP_sort(ssl_comp_methods);
494                                 }
495                         MemCheck_on();
496                         }
497                 }
498         
499         if (got_write_lock)
500                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
501         else
502                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
503         }
504 #endif
505
506 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
507              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp, int use_etm)
508         {
509         int i;
510         const SSL_CIPHER *c;
511
512         c=s->cipher;
513         if (c == NULL) return(0);
514         if (comp != NULL)
515                 {
516                 SSL_COMP ctmp;
517 #ifndef OPENSSL_NO_COMP
518                 load_builtin_compressions();
519 #endif
520
521                 *comp=NULL;
522                 ctmp.id=s->compress_meth;
523                 if (ssl_comp_methods != NULL)
524                         {
525                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
526                         if (i >= 0)
527                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
528                         else
529                                 *comp=NULL;
530                         }
531                 }
532
533         if ((enc == NULL) || (md == NULL)) return(0);
534
535         switch (c->algorithm_enc)
536                 {
537         case SSL_DES:
538                 i=SSL_ENC_DES_IDX;
539                 break;
540         case SSL_3DES:
541                 i=SSL_ENC_3DES_IDX;
542                 break;
543         case SSL_RC4:
544                 i=SSL_ENC_RC4_IDX;
545                 break;
546         case SSL_RC2:
547                 i=SSL_ENC_RC2_IDX;
548                 break;
549         case SSL_IDEA:
550                 i=SSL_ENC_IDEA_IDX;
551                 break;
552         case SSL_eNULL:
553                 i=SSL_ENC_NULL_IDX;
554                 break;
555         case SSL_AES128:
556                 i=SSL_ENC_AES128_IDX;
557                 break;
558         case SSL_AES256:
559                 i=SSL_ENC_AES256_IDX;
560                 break;
561         case SSL_CAMELLIA128:
562                 i=SSL_ENC_CAMELLIA128_IDX;
563                 break;
564         case SSL_CAMELLIA256:
565                 i=SSL_ENC_CAMELLIA256_IDX;
566                 break;
567         case SSL_eGOST2814789CNT:
568                 i=SSL_ENC_GOST89_IDX;
569                 break;
570         case SSL_SEED:
571                 i=SSL_ENC_SEED_IDX;
572                 break;
573         case SSL_AES128GCM:
574                 i=SSL_ENC_AES128GCM_IDX;
575                 break;
576         case SSL_AES256GCM:
577                 i=SSL_ENC_AES256GCM_IDX;
578                 break;
579         default:
580                 i= -1;
581                 break;
582                 }
583
584         if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
585                 *enc=NULL;
586         else
587                 {
588                 if (i == SSL_ENC_NULL_IDX)
589                         *enc=EVP_enc_null();
590                 else
591                         *enc=ssl_cipher_methods[i];
592                 }
593
594         switch (c->algorithm_mac)
595                 {
596         case SSL_MD5:
597                 i=SSL_MD_MD5_IDX;
598                 break;
599         case SSL_SHA1:
600                 i=SSL_MD_SHA1_IDX;
601                 break;
602         case SSL_SHA256:
603                 i=SSL_MD_SHA256_IDX;
604                 break;
605         case SSL_SHA384:
606                 i=SSL_MD_SHA384_IDX;
607                 break;
608         case SSL_GOST94:
609                 i = SSL_MD_GOST94_IDX;
610                 break;
611         case SSL_GOST89MAC:
612                 i = SSL_MD_GOST89MAC_IDX;
613                 break;
614         default:
615                 i= -1;
616                 break;
617                 }
618         if ((i < 0) || (i >= SSL_MD_NUM_IDX))
619         {
620                 *md=NULL; 
621                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
622                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
623                 if (c->algorithm_mac == SSL_AEAD)
624                         mac_pkey_type = NULL;
625         }
626         else
627         {
628                 *md=ssl_digest_methods[i];
629                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
630                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
631         }
632
633         if ((*enc != NULL) &&
634             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
635             (!mac_pkey_type||*mac_pkey_type != NID_undef))
636                 {
637                 const EVP_CIPHER *evp;
638
639                 if (use_etm)
640                         return 1;
641
642                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
643                     s->ssl_version < TLS1_VERSION)
644                         return 1;
645
646                 if (FIPS_mode())
647                         return 1;
648
649                 if      (c->algorithm_enc == SSL_RC4 &&
650                          c->algorithm_mac == SSL_MD5 &&
651                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
652                         *enc = evp, *md = NULL;
653                 else if (c->algorithm_enc == SSL_AES128 &&
654                          c->algorithm_mac == SSL_SHA1 &&
655                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
656                         *enc = evp, *md = NULL;
657                 else if (c->algorithm_enc == SSL_AES256 &&
658                          c->algorithm_mac == SSL_SHA1 &&
659                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
660                         *enc = evp, *md = NULL;
661                 else if (c->algorithm_enc == SSL_AES128 &&
662                          c->algorithm_mac == SSL_SHA256 &&
663                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
664                         *enc = evp, *md = NULL;
665                 else if (c->algorithm_enc == SSL_AES256 &&
666                          c->algorithm_mac == SSL_SHA256 &&
667                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
668                         *enc = evp, *md = NULL;
669                 return(1);
670                 }
671         else
672                 return(0);
673         }
674
675 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
676 {
677         if (idx <0||idx>=SSL_MD_NUM_IDX) 
678                 {
679                 return 0;
680                 }
681         *mask = ssl_handshake_digest_flag[idx];
682         if (*mask)
683                 *md = ssl_digest_methods[idx];
684         else
685                 *md = NULL;
686         return 1;
687 }
688
689 #define ITEM_SEP(a) \
690         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
691
692 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
693              CIPHER_ORDER **tail)
694         {
695         if (curr == *tail) return;
696         if (curr == *head)
697                 *head=curr->next;
698         if (curr->prev != NULL)
699                 curr->prev->next=curr->next;
700         if (curr->next != NULL)
701                 curr->next->prev=curr->prev;
702         (*tail)->next=curr;
703         curr->prev= *tail;
704         curr->next=NULL;
705         *tail=curr;
706         }
707
708 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
709              CIPHER_ORDER **tail)
710         {
711         if (curr == *head) return;
712         if (curr == *tail)
713                 *tail=curr->prev;
714         if (curr->next != NULL)
715                 curr->next->prev=curr->prev;
716         if (curr->prev != NULL)
717                 curr->prev->next=curr->next;
718         (*head)->prev=curr;
719         curr->next= *head;
720         curr->prev=NULL;
721         *head=curr;
722         }
723
724 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
725         {
726         *mkey = 0;
727         *auth = 0;
728         *enc = 0;
729         *mac = 0;
730         *ssl = 0;
731
732 #ifdef OPENSSL_NO_RSA
733         *mkey |= SSL_kRSA;
734         *auth |= SSL_aRSA;
735 #endif
736 #ifdef OPENSSL_NO_DSA
737         *auth |= SSL_aDSS;
738 #endif
739 #ifdef OPENSSL_NO_DH
740         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kDHE;
741         *auth |= SSL_aDH;
742 #endif
743 #ifdef OPENSSL_NO_KRB5
744         *mkey |= SSL_kKRB5;
745         *auth |= SSL_aKRB5;
746 #endif
747 #ifdef OPENSSL_NO_ECDSA
748         *auth |= SSL_aECDSA;
749 #endif
750 #ifdef OPENSSL_NO_ECDH
751         *mkey |= SSL_kECDHe|SSL_kECDHr;
752         *auth |= SSL_aECDH;
753 #endif
754 #ifdef OPENSSL_NO_PSK
755         *mkey |= SSL_kPSK;
756         *auth |= SSL_aPSK;
757 #endif
758 #ifdef OPENSSL_NO_SRP
759         *mkey |= SSL_kSRP;
760 #endif
761         /* Check for presence of GOST 34.10 algorithms, and if they
762          * do not present, disable  appropriate auth and key exchange */
763         if (!get_optional_pkey_id("gost94")) {
764                 *auth |= SSL_aGOST94;
765         }
766         if (!get_optional_pkey_id("gost2001")) {
767                 *auth |= SSL_aGOST01;
768         }
769         /* Disable GOST key exchange if no GOST signature algs are available * */
770         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
771                 *mkey |= SSL_kGOST;
772         }       
773 #ifdef SSL_FORBID_ENULL
774         *enc |= SSL_eNULL;
775 #endif
776                 
777
778
779         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
780         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
781         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
782         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
783         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
784         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
785         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
786         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
787         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
788         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
789         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
790         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
791         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
792
793         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
794         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
795         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
796         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
797         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
798         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
799
800         }
801
802 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
803                 int num_of_ciphers,
804                 unsigned long disabled_mkey, unsigned long disabled_auth,
805                 unsigned long disabled_enc, unsigned long disabled_mac,
806                 unsigned long disabled_ssl,
807                 CIPHER_ORDER *co_list,
808                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
809         {
810         int i, co_list_num;
811         const SSL_CIPHER *c;
812
813         /*
814          * We have num_of_ciphers descriptions compiled in, depending on the
815          * method selected (SSLv3, TLSv1 etc).
816          * These will later be sorted in a linked list with at most num
817          * entries.
818          */
819
820         /* Get the initial list of ciphers */
821         co_list_num = 0;        /* actual count of ciphers */
822         for (i = 0; i < num_of_ciphers; i++)
823                 {
824                 c = ssl_method->get_cipher(i);
825                 /* drop those that use any of that is not available */
826                 if ((c != NULL) && c->valid &&
827                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
828                     !(c->algorithm_mkey & disabled_mkey) &&
829                     !(c->algorithm_auth & disabled_auth) &&
830                     !(c->algorithm_enc & disabled_enc) &&
831                     !(c->algorithm_mac & disabled_mac) &&
832                     !(c->algorithm_ssl & disabled_ssl))
833                         {
834                         co_list[co_list_num].cipher = c;
835                         co_list[co_list_num].next = NULL;
836                         co_list[co_list_num].prev = NULL;
837                         co_list[co_list_num].active = 0;
838                         co_list_num++;
839 #ifdef KSSL_DEBUG
840                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
841 #endif  /* KSSL_DEBUG */
842                         /*
843                         if (!sk_push(ca_list,(char *)c)) goto err;
844                         */
845                         }
846                 }
847
848         /*
849          * Prepare linked list from list entries
850          */     
851         if (co_list_num > 0)
852                 {
853                 co_list[0].prev = NULL;
854
855                 if (co_list_num > 1)
856                         {
857                         co_list[0].next = &co_list[1];
858                         
859                         for (i = 1; i < co_list_num - 1; i++)
860                                 {
861                                 co_list[i].prev = &co_list[i - 1];
862                                 co_list[i].next = &co_list[i + 1];
863                                 }
864
865                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
866                         }
867                 
868                 co_list[co_list_num - 1].next = NULL;
869
870                 *head_p = &co_list[0];
871                 *tail_p = &co_list[co_list_num - 1];
872                 }
873         }
874
875 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
876                         int num_of_group_aliases,
877                         unsigned long disabled_mkey, unsigned long disabled_auth,
878                         unsigned long disabled_enc, unsigned long disabled_mac,
879                         unsigned long disabled_ssl,
880                         CIPHER_ORDER *head)
881         {
882         CIPHER_ORDER *ciph_curr;
883         const SSL_CIPHER **ca_curr;
884         int i;
885         unsigned long mask_mkey = ~disabled_mkey;
886         unsigned long mask_auth = ~disabled_auth;
887         unsigned long mask_enc = ~disabled_enc;
888         unsigned long mask_mac = ~disabled_mac;
889         unsigned long mask_ssl = ~disabled_ssl;
890
891         /*
892          * First, add the real ciphers as already collected
893          */
894         ciph_curr = head;
895         ca_curr = ca_list;
896         while (ciph_curr != NULL)
897                 {
898                 *ca_curr = ciph_curr->cipher;
899                 ca_curr++;
900                 ciph_curr = ciph_curr->next;
901                 }
902
903         /*
904          * Now we add the available ones from the cipher_aliases[] table.
905          * They represent either one or more algorithms, some of which
906          * in any affected category must be supported (set in enabled_mask),
907          * or represent a cipher strength value (will be added in any case because algorithms=0).
908          */
909         for (i = 0; i < num_of_group_aliases; i++)
910                 {
911                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
912                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
913                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
914                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
915                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
916
917                 if (algorithm_mkey)
918                         if ((algorithm_mkey & mask_mkey) == 0)
919                                 continue;
920         
921                 if (algorithm_auth)
922                         if ((algorithm_auth & mask_auth) == 0)
923                                 continue;
924                 
925                 if (algorithm_enc)
926                         if ((algorithm_enc & mask_enc) == 0)
927                                 continue;
928                 
929                 if (algorithm_mac)
930                         if ((algorithm_mac & mask_mac) == 0)
931                                 continue;
932                 
933                 if (algorithm_ssl)
934                         if ((algorithm_ssl & mask_ssl) == 0)
935                                 continue;
936                 
937                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
938                 ca_curr++;
939                 }
940
941         *ca_curr = NULL;        /* end of list */
942         }
943
944 static void ssl_cipher_apply_rule(unsigned long cipher_id,
945                 unsigned long alg_mkey, unsigned long alg_auth,
946                 unsigned long alg_enc, unsigned long alg_mac,
947                 unsigned long alg_ssl,
948                 unsigned long algo_strength,
949                 int rule, int strength_bits,
950                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
951         {
952         CIPHER_ORDER *head, *tail, *curr, *next, *last;
953         const SSL_CIPHER *cp;
954         int reverse = 0;
955
956 #ifdef CIPHER_DEBUG
957         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
958                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
959 #endif
960
961         if (rule == CIPHER_DEL)
962                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
963
964         head = *head_p;
965         tail = *tail_p;
966
967         if (reverse)
968                 {
969                 next = tail;
970                 last = head;
971                 }
972         else
973                 {
974                 next = head;
975                 last = tail;
976                 }
977
978         curr = NULL;
979         for (;;)
980                 {
981                 if (curr == last) break;
982
983                 curr = next;
984
985                 if (curr == NULL) break;
986
987                 next = reverse ? curr->prev : curr->next;
988
989                 cp = curr->cipher;
990
991                 /*
992                  * Selection criteria is either the value of strength_bits
993                  * or the algorithms used.
994                  */
995                 if (strength_bits >= 0)
996                         {
997                         if (strength_bits != cp->strength_bits)
998                                 continue;
999                         }
1000                 else
1001                         {
1002 #ifdef CIPHER_DEBUG
1003                         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);
1004 #endif
1005 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1006                         if (cipher_id && cipher_id != cp->id)
1007                                 continue;
1008 #endif
1009                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1010                                 continue;
1011                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
1012                                 continue;
1013                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
1014                                 continue;
1015                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
1016                                 continue;
1017                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1018                                 continue;
1019                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1020                                 continue;
1021                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1022                                 continue;
1023                         }
1024
1025 #ifdef CIPHER_DEBUG
1026                 printf("Action = %d\n", rule);
1027 #endif
1028
1029                 /* add the cipher if it has not been added yet. */
1030                 if (rule == CIPHER_ADD)
1031                         {
1032                         /* reverse == 0 */
1033                         if (!curr->active)
1034                                 {
1035                                 ll_append_tail(&head, curr, &tail);
1036                                 curr->active = 1;
1037                                 }
1038                         }
1039                 /* Move the added cipher to this location */
1040                 else if (rule == CIPHER_ORD)
1041                         {
1042                         /* reverse == 0 */
1043                         if (curr->active)
1044                                 {
1045                                 ll_append_tail(&head, curr, &tail);
1046                                 }
1047                         }
1048                 else if (rule == CIPHER_DEL)
1049                         {
1050                         /* reverse == 1 */
1051                         if (curr->active)
1052                                 {
1053                                 /* most recently deleted ciphersuites get best positions
1054                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1055                                  * works in reverse to maintain the order) */
1056                                 ll_append_head(&head, curr, &tail);
1057                                 curr->active = 0;
1058                                 }
1059                         }
1060                 else if (rule == CIPHER_KILL)
1061                         {
1062                         /* reverse == 0 */
1063                         if (head == curr)
1064                                 head = curr->next;
1065                         else
1066                                 curr->prev->next = curr->next;
1067                         if (tail == curr)
1068                                 tail = curr->prev;
1069                         curr->active = 0;
1070                         if (curr->next != NULL)
1071                                 curr->next->prev = curr->prev;
1072                         if (curr->prev != NULL)
1073                                 curr->prev->next = curr->next;
1074                         curr->next = NULL;
1075                         curr->prev = NULL;
1076                         }
1077                 }
1078
1079         *head_p = head;
1080         *tail_p = tail;
1081         }
1082
1083 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1084                                     CIPHER_ORDER **tail_p)
1085         {
1086         int max_strength_bits, i, *number_uses;
1087         CIPHER_ORDER *curr;
1088
1089         /*
1090          * This routine sorts the ciphers with descending strength. The sorting
1091          * must keep the pre-sorted sequence, so we apply the normal sorting
1092          * routine as '+' movement to the end of the list.
1093          */
1094         max_strength_bits = 0;
1095         curr = *head_p;
1096         while (curr != NULL)
1097                 {
1098                 if (curr->active &&
1099                     (curr->cipher->strength_bits > max_strength_bits))
1100                     max_strength_bits = curr->cipher->strength_bits;
1101                 curr = curr->next;
1102                 }
1103
1104         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1105         if (!number_uses)
1106                 {
1107                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1108                 return(0);
1109                 }
1110         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1111
1112         /*
1113          * Now find the strength_bits values actually used
1114          */
1115         curr = *head_p;
1116         while (curr != NULL)
1117                 {
1118                 if (curr->active)
1119                         number_uses[curr->cipher->strength_bits]++;
1120                 curr = curr->next;
1121                 }
1122         /*
1123          * Go through the list of used strength_bits values in descending
1124          * order.
1125          */
1126         for (i = max_strength_bits; i >= 0; i--)
1127                 if (number_uses[i] > 0)
1128                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1129
1130         OPENSSL_free(number_uses);
1131         return(1);
1132         }
1133
1134 static int ssl_cipher_process_rulestr(const char *rule_str,
1135                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1136                 const SSL_CIPHER **ca_list, CERT *c)
1137         {
1138         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1139         const char *l, *buf;
1140         int j, multi, found, rule, retval, ok, buflen;
1141         unsigned long cipher_id = 0;
1142         char ch;
1143
1144         retval = 1;
1145         l = rule_str;
1146         for (;;)
1147                 {
1148                 ch = *l;
1149
1150                 if (ch == '\0')
1151                         break;          /* done */
1152                 if (ch == '-')
1153                         { rule = CIPHER_DEL; l++; }
1154                 else if (ch == '+')
1155                         { rule = CIPHER_ORD; l++; }
1156                 else if (ch == '!')
1157                         { rule = CIPHER_KILL; l++; }
1158                 else if (ch == '@')
1159                         { rule = CIPHER_SPECIAL; l++; }
1160                 else
1161                         { rule = CIPHER_ADD; }
1162
1163                 if (ITEM_SEP(ch))
1164                         {
1165                         l++;
1166                         continue;
1167                         }
1168
1169                 alg_mkey = 0;
1170                 alg_auth = 0;
1171                 alg_enc = 0;
1172                 alg_mac = 0;
1173                 alg_ssl = 0;
1174                 algo_strength = 0;
1175
1176                 for (;;)
1177                         {
1178                         ch = *l;
1179                         buf = l;
1180                         buflen = 0;
1181 #ifndef CHARSET_EBCDIC
1182                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1183                                 ((ch >= '0') && (ch <= '9')) ||
1184                                 ((ch >= 'a') && (ch <= 'z')) ||
1185                                  (ch == '-') || (ch == '.')  ||
1186                                  (ch == '='))
1187 #else
1188                         while ( isalnum(ch) || (ch == '-') || (ch == '.') ||
1189                                 (ch == '='))
1190 #endif
1191                                  {
1192                                  ch = *(++l);
1193                                  buflen++;
1194                                  }
1195
1196                         if (buflen == 0)
1197                                 {
1198                                 /*
1199                                  * We hit something we cannot deal with,
1200                                  * it is no command or separator nor
1201                                  * alphanumeric, so we call this an error.
1202                                  */
1203                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1204                                        SSL_R_INVALID_COMMAND);
1205                                 retval = found = 0;
1206                                 l++;
1207                                 break;
1208                                 }
1209
1210                         if (rule == CIPHER_SPECIAL)
1211                                 {
1212                                 found = 0; /* unused -- avoid compiler warning */
1213                                 break;  /* special treatment */
1214                                 }
1215
1216                         /* check for multi-part specification */
1217                         if (ch == '+')
1218                                 {
1219                                 multi=1;
1220                                 l++;
1221                                 }
1222                         else
1223                                 multi=0;
1224
1225                         /*
1226                          * Now search for the cipher alias in the ca_list. Be careful
1227                          * with the strncmp, because the "buflen" limitation
1228                          * will make the rule "ADH:SOME" and the cipher
1229                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1230                          * So additionally check whether the cipher name found
1231                          * has the correct length. We can save a strlen() call:
1232                          * just checking for the '\0' at the right place is
1233                          * sufficient, we have to strncmp() anyway. (We cannot
1234                          * use strcmp(), because buf is not '\0' terminated.)
1235                          */
1236                         j = found = 0;
1237                         cipher_id = 0;
1238                         while (ca_list[j])
1239                                 {
1240                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1241                                     (ca_list[j]->name[buflen] == '\0'))
1242                                         {
1243                                         found = 1;
1244                                         break;
1245                                         }
1246                                 else
1247                                         j++;
1248                                 }
1249
1250                         if (!found)
1251                                 break;  /* ignore this entry */
1252
1253                         if (ca_list[j]->algorithm_mkey)
1254                                 {
1255                                 if (alg_mkey)
1256                                         {
1257                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1258                                         if (!alg_mkey) { found = 0; break; }
1259                                         }
1260                                 else
1261                                         alg_mkey = ca_list[j]->algorithm_mkey;
1262                                 }
1263
1264                         if (ca_list[j]->algorithm_auth)
1265                                 {
1266                                 if (alg_auth)
1267                                         {
1268                                         alg_auth &= ca_list[j]->algorithm_auth;
1269                                         if (!alg_auth) { found = 0; break; }
1270                                         }
1271                                 else
1272                                         alg_auth = ca_list[j]->algorithm_auth;
1273                                 }
1274                         
1275                         if (ca_list[j]->algorithm_enc)
1276                                 {
1277                                 if (alg_enc)
1278                                         {
1279                                         alg_enc &= ca_list[j]->algorithm_enc;
1280                                         if (!alg_enc) { found = 0; break; }
1281                                         }
1282                                 else
1283                                         alg_enc = ca_list[j]->algorithm_enc;
1284                                 }
1285                                                 
1286                         if (ca_list[j]->algorithm_mac)
1287                                 {
1288                                 if (alg_mac)
1289                                         {
1290                                         alg_mac &= ca_list[j]->algorithm_mac;
1291                                         if (!alg_mac) { found = 0; break; }
1292                                         }
1293                                 else
1294                                         alg_mac = ca_list[j]->algorithm_mac;
1295                                 }
1296                         
1297                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1298                                 {
1299                                 if (algo_strength & SSL_EXP_MASK)
1300                                         {
1301                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1302                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1303                                         }
1304                                 else
1305                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1306                                 }
1307
1308                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1309                                 {
1310                                 if (algo_strength & SSL_STRONG_MASK)
1311                                         {
1312                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1313                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1314                                         }
1315                                 else
1316                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1317                                 }
1318                         
1319                         if (ca_list[j]->valid)
1320                                 {
1321                                 /* explicit ciphersuite found; its protocol version
1322                                  * does not become part of the search pattern!*/
1323
1324                                 cipher_id = ca_list[j]->id;
1325                                 }
1326                         else
1327                                 {
1328                                 /* not an explicit ciphersuite; only in this case, the
1329                                  * protocol version is considered part of the search pattern */
1330
1331                                 if (ca_list[j]->algorithm_ssl)
1332                                         {
1333                                         if (alg_ssl)
1334                                                 {
1335                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1336                                                 if (!alg_ssl) { found = 0; break; }
1337                                                 }
1338                                         else
1339                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1340                                         }
1341                                 }
1342                         
1343                         if (!multi) break;
1344                         }
1345
1346                 /*
1347                  * Ok, we have the rule, now apply it
1348                  */
1349                 if (rule == CIPHER_SPECIAL)
1350                         {       /* special command */
1351                         ok = 0;
1352                         if ((buflen == 8) &&
1353                                 !strncmp(buf, "STRENGTH", 8))
1354                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1355                         else if (buflen == 10 && !strncmp(buf, "SECLEVEL=", 9))
1356                                 {
1357                                 int level = buf[9] - '0';
1358                                 if (level < 0 || level > 5)
1359                                         {
1360                                         SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1361                                                 SSL_R_INVALID_COMMAND);
1362                                         }
1363                                 else
1364                                         {
1365                                         c->sec_level = level;
1366                                         ok = 1;
1367                                         }
1368                                 }
1369                         else
1370                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1371                                         SSL_R_INVALID_COMMAND);
1372                         if (ok == 0)
1373                                 retval = 0;
1374                         /*
1375                          * We do not support any "multi" options
1376                          * together with "@", so throw away the
1377                          * rest of the command, if any left, until
1378                          * end or ':' is found.
1379                          */
1380                         while ((*l != '\0') && !ITEM_SEP(*l))
1381                                 l++;
1382                         }
1383                 else if (found)
1384                         {
1385                         ssl_cipher_apply_rule(cipher_id,
1386                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1387                                 rule, -1, head_p, tail_p);
1388                         }
1389                 else
1390                         {
1391                         while ((*l != '\0') && !ITEM_SEP(*l))
1392                                 l++;
1393                         }
1394                 if (*l == '\0') break; /* done */
1395                 }
1396
1397         return(retval);
1398         }
1399 #ifndef OPENSSL_NO_EC
1400 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1401                                         const char **prule_str)
1402         {
1403         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1404         if (!strcmp(*prule_str, "SUITEB128"))
1405                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1406         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1407                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1408         else if (!strcmp(*prule_str, "SUITEB128C2"))
1409                 {
1410                 suiteb_comb2 = 1;
1411                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1412                 }
1413         else if (!strcmp(*prule_str, "SUITEB192"))
1414                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1415
1416         if (suiteb_flags)
1417                 {
1418                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1419                 c->cert_flags |= suiteb_flags;
1420                 }
1421         else
1422                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1423
1424         if (!suiteb_flags)
1425                 return 1;
1426         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1427
1428         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1429                 {
1430                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1431                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1432                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1433                 else
1434                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1435                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1436                 return 0;
1437                 }
1438
1439         switch(suiteb_flags)
1440                 {
1441         case SSL_CERT_FLAG_SUITEB_128_LOS:
1442                 if (suiteb_comb2)
1443                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1444                 else
1445                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1446                 break;
1447         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1448                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1449                 break;
1450         case SSL_CERT_FLAG_SUITEB_192_LOS:
1451                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1452                 break;
1453                 }
1454         /* Set auto ECDH parameter determination */
1455         c->ecdh_tmp_auto = 1;
1456         return 1;
1457         }
1458 #endif
1459
1460 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1461                 STACK_OF(SSL_CIPHER) **cipher_list,
1462                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1463                 const char *rule_str, CERT *c)
1464         {
1465         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1466         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1467         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1468         const char *rule_p;
1469         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1470         const SSL_CIPHER **ca_list = NULL;
1471
1472         /*
1473          * Return with error if nothing to do.
1474          */
1475         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1476                 return NULL;
1477 #ifndef OPENSSL_NO_EC
1478         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1479                 return NULL;
1480 #endif
1481
1482         /*
1483          * To reduce the work to do we only want to process the compiled
1484          * in algorithms, so we first get the mask of disabled ciphers.
1485          */
1486         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1487
1488         /*
1489          * Now we have to collect the available ciphers from the compiled
1490          * in ciphers. We cannot get more than the number compiled in, so
1491          * it is used for allocation.
1492          */
1493         num_of_ciphers = ssl_method->num_ciphers();
1494 #ifdef KSSL_DEBUG
1495         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1496 #endif    /* KSSL_DEBUG */
1497         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1498         if (co_list == NULL)
1499                 {
1500                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1501                 return(NULL);   /* Failure */
1502                 }
1503
1504         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1505                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1506                                    co_list, &head, &tail);
1507
1508
1509         /* Now arrange all ciphers by preference: */
1510
1511         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1512         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1513         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1514
1515         /* AES is our preferred symmetric cipher */
1516         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1517
1518         /* Temporarily enable everything else for sorting */
1519         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1520
1521         /* Low priority for MD5 */
1522         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1523
1524         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1525          * (For applications that allow them, they aren't too bad, but we prefer
1526          * authenticated ciphers.) */
1527         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1528
1529         /* Move ciphers without forward secrecy to the end */
1530         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1531         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1532         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1533         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1534         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1535
1536         /* RC4 is sort-of broken -- move the the end */
1537         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1538
1539         /* Now sort by symmetric encryption strength.  The above ordering remains
1540          * in force within each class */
1541         if (!ssl_cipher_strength_sort(&head, &tail))
1542                 {
1543                 OPENSSL_free(co_list);
1544                 return NULL;
1545                 }
1546
1547         /* Now disable everything (maintaining the ordering!) */
1548         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1549
1550
1551         /*
1552          * We also need cipher aliases for selecting based on the rule_str.
1553          * There might be two types of entries in the rule_str: 1) names
1554          * of ciphers themselves 2) aliases for groups of ciphers.
1555          * For 1) we need the available ciphers and for 2) the cipher
1556          * groups of cipher_aliases added together in one list (otherwise
1557          * we would be happy with just the cipher_aliases table).
1558          */
1559         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1560         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1561         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1562         if (ca_list == NULL)
1563                 {
1564                 OPENSSL_free(co_list);
1565                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1566                 return(NULL);   /* Failure */
1567                 }
1568         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1569                                    disabled_mkey, disabled_auth, disabled_enc,
1570                                    disabled_mac, disabled_ssl, head);
1571
1572         /*
1573          * If the rule_string begins with DEFAULT, apply the default rule
1574          * before using the (possibly available) additional rules.
1575          */
1576         ok = 1;
1577         rule_p = rule_str;
1578         if (strncmp(rule_str,"DEFAULT",7) == 0)
1579                 {
1580                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1581                         &head, &tail, ca_list, c);
1582                 rule_p += 7;
1583                 if (*rule_p == ':')
1584                         rule_p++;
1585                 }
1586
1587         if (ok && (strlen(rule_p) > 0))
1588                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1589
1590         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1591
1592         if (!ok)
1593                 {       /* Rule processing failure */
1594                 OPENSSL_free(co_list);
1595                 return(NULL);
1596                 }
1597         
1598         /*
1599          * Allocate new "cipherstack" for the result, return with error
1600          * if we cannot get one.
1601          */
1602         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1603                 {
1604                 OPENSSL_free(co_list);
1605                 return(NULL);
1606                 }
1607
1608         /*
1609          * The cipher selection for the list is done. The ciphers are added
1610          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1611          */
1612         for (curr = head; curr != NULL; curr = curr->next)
1613                 {
1614                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1615                         {
1616                         if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher))
1617                                 {
1618                                 OPENSSL_free(co_list);
1619                                 sk_SSL_CIPHER_free(cipherstack);
1620                                 return NULL;
1621                                 }
1622 #ifdef CIPHER_DEBUG
1623                         printf("<%s>\n",curr->cipher->name);
1624 #endif
1625                         }
1626                 }
1627         OPENSSL_free(co_list);  /* Not needed any longer */
1628
1629         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1630         if (tmp_cipher_list == NULL)
1631                 {
1632                 sk_SSL_CIPHER_free(cipherstack);
1633                 return NULL;
1634                 }
1635         if (*cipher_list != NULL)
1636                 sk_SSL_CIPHER_free(*cipher_list);
1637         *cipher_list = cipherstack;
1638         if (*cipher_list_by_id != NULL)
1639                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1640         *cipher_list_by_id = tmp_cipher_list;
1641         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1642
1643         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1644         return(cipherstack);
1645         }
1646
1647 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1648         {
1649         int is_export,pkl,kl;
1650         const char *ver,*exp_str;
1651         const char *kx,*au,*enc,*mac;
1652         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl;
1653 #ifdef KSSL_DEBUG
1654         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1655 #else
1656         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1657 #endif /* KSSL_DEBUG */
1658
1659         alg_mkey = cipher->algorithm_mkey;
1660         alg_auth = cipher->algorithm_auth;
1661         alg_enc = cipher->algorithm_enc;
1662         alg_mac = cipher->algorithm_mac;
1663         alg_ssl = cipher->algorithm_ssl;
1664
1665         is_export=SSL_C_IS_EXPORT(cipher);
1666         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1667         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1668         exp_str=is_export?" export":"";
1669         
1670         if (alg_ssl & SSL_SSLV3)
1671                 ver="SSLv3";
1672         else if (alg_ssl & SSL_TLSV1_2)
1673                 ver="TLSv1.2";
1674         else
1675                 ver="unknown";
1676
1677         switch (alg_mkey)
1678                 {
1679         case SSL_kRSA:
1680                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1681                 break;
1682         case SSL_kDHr:
1683                 kx="DH/RSA";
1684                 break;
1685         case SSL_kDHd:
1686                 kx="DH/DSS";
1687                 break;
1688         case SSL_kKRB5:
1689                 kx="KRB5";
1690                 break;
1691         case SSL_kDHE:
1692                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1693                 break;
1694         case SSL_kECDHr:
1695                 kx="ECDH/RSA";
1696                 break;
1697         case SSL_kECDHe:
1698                 kx="ECDH/ECDSA";
1699                 break;
1700         case SSL_kECDHE:
1701                 kx="ECDH";
1702                 break;
1703         case SSL_kPSK:
1704                 kx="PSK";
1705                 break;
1706         case SSL_kSRP:
1707                 kx="SRP";
1708                 break;
1709         case SSL_kGOST:
1710                 kx="GOST";
1711                 break;
1712         default:
1713                 kx="unknown";
1714                 }
1715
1716         switch (alg_auth)
1717                 {
1718         case SSL_aRSA:
1719                 au="RSA";
1720                 break;
1721         case SSL_aDSS:
1722                 au="DSS";
1723                 break;
1724         case SSL_aDH:
1725                 au="DH";
1726                 break;
1727         case SSL_aKRB5:
1728                 au="KRB5";
1729                 break;
1730         case SSL_aECDH:
1731                 au="ECDH";
1732                 break;
1733         case SSL_aNULL:
1734                 au="None";
1735                 break;
1736         case SSL_aECDSA:
1737                 au="ECDSA";
1738                 break;
1739         case SSL_aPSK:
1740                 au="PSK";
1741                 break;
1742         case SSL_aSRP:
1743                 au="SRP";
1744                 break;
1745         case SSL_aGOST94:
1746                 au="GOST94";
1747                 break;
1748         case SSL_aGOST01:
1749                 au="GOST01";
1750                 break;
1751         default:
1752                 au="unknown";
1753                 break;
1754                 }
1755
1756         switch (alg_enc)
1757                 {
1758         case SSL_DES:
1759                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1760                 break;
1761         case SSL_3DES:
1762                 enc="3DES(168)";
1763                 break;
1764         case SSL_RC4:
1765                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)"):"RC4(128)";
1766                 break;
1767         case SSL_RC2:
1768                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1769                 break;
1770         case SSL_IDEA:
1771                 enc="IDEA(128)";
1772                 break;
1773         case SSL_eNULL:
1774                 enc="None";
1775                 break;
1776         case SSL_AES128:
1777                 enc="AES(128)";
1778                 break;
1779         case SSL_AES256:
1780                 enc="AES(256)";
1781                 break;
1782         case SSL_AES128GCM:
1783                 enc="AESGCM(128)";
1784                 break;
1785         case SSL_AES256GCM:
1786                 enc="AESGCM(256)";
1787                 break;
1788         case SSL_CAMELLIA128:
1789                 enc="Camellia(128)";
1790                 break;
1791         case SSL_CAMELLIA256:
1792                 enc="Camellia(256)";
1793                 break;
1794         case SSL_SEED:
1795                 enc="SEED(128)";
1796                 break;
1797         case SSL_eGOST2814789CNT:
1798                 enc="GOST89(256)";
1799                 break;
1800         default:
1801                 enc="unknown";
1802                 break;
1803                 }
1804
1805         switch (alg_mac)
1806                 {
1807         case SSL_MD5:
1808                 mac="MD5";
1809                 break;
1810         case SSL_SHA1:
1811                 mac="SHA1";
1812                 break;
1813         case SSL_SHA256:
1814                 mac="SHA256";
1815                 break;
1816         case SSL_SHA384:
1817                 mac="SHA384";
1818                 break;
1819         case SSL_AEAD:
1820                 mac="AEAD";
1821                 break;
1822         case SSL_GOST89MAC:
1823                 mac="GOST89";
1824                 break;
1825         case SSL_GOST94:
1826                 mac="GOST94";
1827                 break;
1828         default:
1829                 mac="unknown";
1830                 break;
1831                 }
1832
1833         if (buf == NULL)
1834                 {
1835                 len=128;
1836                 buf=OPENSSL_malloc(len);
1837                 if (buf == NULL) return("OPENSSL_malloc Error");
1838                 }
1839         else if (len < 128)
1840                 return("Buffer too small");
1841
1842 #ifdef KSSL_DEBUG
1843         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1844 #else
1845         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1846 #endif /* KSSL_DEBUG */
1847         return(buf);
1848         }
1849
1850 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1851         {
1852         int i;
1853
1854         if (c == NULL) return("(NONE)");
1855         i=(int)(c->id>>24L);
1856         if (i == 3)
1857                 return("TLSv1/SSLv3");
1858         else
1859                 return("unknown");
1860         }
1861
1862 /* return the actual cipher being used */
1863 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1864         {
1865         if (c != NULL)
1866                 return(c->name);
1867         return("(NONE)");
1868         }
1869
1870 /* number of bits for symmetric cipher */
1871 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1872         {
1873         int ret=0;
1874
1875         if (c != NULL)
1876                 {
1877                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1878                 ret = c->strength_bits;
1879                 }
1880         return(ret);
1881         }
1882
1883 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1884         {
1885         return c->id;
1886         }
1887
1888 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1889         {
1890         SSL_COMP *ctmp;
1891         int i,nn;
1892
1893         if ((n == 0) || (sk == NULL)) return(NULL);
1894         nn=sk_SSL_COMP_num(sk);
1895         for (i=0; i<nn; i++)
1896                 {
1897                 ctmp=sk_SSL_COMP_value(sk,i);
1898                 if (ctmp->id == n)
1899                         return(ctmp);
1900                 }
1901         return(NULL);
1902         }
1903
1904 #ifdef OPENSSL_NO_COMP
1905 void *SSL_COMP_get_compression_methods(void)
1906         {
1907         return NULL;
1908         }
1909 int SSL_COMP_add_compression_method(int id, void *cm)
1910         {
1911         return 1;
1912         }
1913
1914 const char *SSL_COMP_get_name(const void *comp)
1915         {
1916         return NULL;
1917         }
1918 #else
1919 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1920         {
1921         load_builtin_compressions();
1922         return(ssl_comp_methods);
1923         }
1924
1925 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1926         {
1927         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1928         ssl_comp_methods = meths;
1929         return old_meths;
1930         }
1931
1932 static void cmeth_free(SSL_COMP *cm)
1933         {
1934         OPENSSL_free(cm);
1935         }
1936
1937 void SSL_COMP_free_compression_methods(void)
1938         {
1939         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1940         ssl_comp_methods = NULL;
1941         sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1942         }
1943
1944 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1945         {
1946         SSL_COMP *comp;
1947
1948         if (cm == NULL || cm->type == NID_undef)
1949                 return 1;
1950
1951         /* According to draft-ietf-tls-compression-04.txt, the
1952            compression number ranges should be the following:
1953
1954            0 to 63:    methods defined by the IETF
1955            64 to 192:  external party methods assigned by IANA
1956            193 to 255: reserved for private use */
1957         if (id < 193 || id > 255)
1958                 {
1959                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1960                 return 0;
1961                 }
1962
1963         MemCheck_off();
1964         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1965         comp->id=id;
1966         comp->method=cm;
1967         load_builtin_compressions();
1968         if (ssl_comp_methods
1969                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1970                 {
1971                 OPENSSL_free(comp);
1972                 MemCheck_on();
1973                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1974                 return(1);
1975                 }
1976         else if ((ssl_comp_methods == NULL)
1977                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1978                 {
1979                 OPENSSL_free(comp);
1980                 MemCheck_on();
1981                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1982                 return(1);
1983                 }
1984         else
1985                 {
1986                 MemCheck_on();
1987                 return(0);
1988                 }
1989         }
1990
1991 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1992         {
1993         if (comp)
1994                 return comp->name;
1995         return NULL;
1996         }
1997 #endif
1998 /* For a cipher return the index corresponding to the certificate type */
1999 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
2000         {
2001         unsigned long alg_k, alg_a;
2002
2003         alg_k = c->algorithm_mkey;
2004         alg_a = c->algorithm_auth;
2005
2006         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2007                 {
2008                 /* we don't need to look at SSL_kECDHE
2009                  * since no certificate is needed for
2010                  * anon ECDH and for authenticated
2011                  * ECDHE, the check for the auth
2012                  * algorithm will set i correctly
2013                  * NOTE: For ECDH-RSA, we need an ECC
2014                  * not an RSA cert but for ECDHE-RSA
2015                  * we need an RSA cert. Placing the
2016                  * checks for SSL_kECDH before RSA
2017                  * checks ensures the correct cert is chosen.
2018                  */
2019                 return SSL_PKEY_ECC;
2020                 }
2021         else if (alg_a & SSL_aECDSA)
2022                 return SSL_PKEY_ECC;
2023         else if (alg_k & SSL_kDHr)
2024                 return SSL_PKEY_DH_RSA;
2025         else if (alg_k & SSL_kDHd)
2026                 return SSL_PKEY_DH_DSA;
2027         else if (alg_a & SSL_aDSS)
2028                 return SSL_PKEY_DSA_SIGN;
2029         else if (alg_a & SSL_aRSA)
2030                 return SSL_PKEY_RSA_ENC;
2031         else if (alg_a & SSL_aKRB5)
2032                 /* VRS something else here? */
2033                 return -1;
2034         else if (alg_a & SSL_aGOST94) 
2035                 return SSL_PKEY_GOST94;
2036         else if (alg_a & SSL_aGOST01)
2037                 return SSL_PKEY_GOST01;
2038         return -1;
2039         }
2040
2041 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2042         {
2043         const SSL_CIPHER *c;
2044         c = ssl->method->get_cipher_by_char(ptr);
2045         if (c == NULL || c->valid == 0)
2046                 return NULL;
2047         return c;
2048         }
2049
2050 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2051         {
2052         return ssl->method->get_cipher_by_char(ptr);
2053         }