Fix no-ssl3 configuration option
[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_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
318         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
319         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
320         {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
321
322         /* export flag */
323         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
324         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
325
326         /* strength classes */
327         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
328         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
329         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
330         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
331         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
332         /* FIPS 140-2 approved ciphersuite */
333         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
334
335         /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
336         {0,SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,0,
337          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
338         {0,SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,0,
339          SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
340         {0,SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,0,
341          SSL_kDHE,SSL_aDSS,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
342         {0,SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,0,
343          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
344         {0,SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,0,
345          SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
346         {0,SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,0,
347          SSL_kDHE,SSL_aRSA,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
348
349         };
350 /* Search for public key algorithm with given name and 
351  * return its pkey_id if it is available. Otherwise return 0
352  */
353 #ifdef OPENSSL_NO_ENGINE
354
355 static int get_optional_pkey_id(const char *pkey_name)
356         {
357         const EVP_PKEY_ASN1_METHOD *ameth;
358         int pkey_id=0;
359         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
360         if (ameth) 
361                 {
362                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
363                 }               
364         return pkey_id;
365         }
366
367 #else
368
369 static int get_optional_pkey_id(const char *pkey_name)
370         {
371         const EVP_PKEY_ASN1_METHOD *ameth;
372         ENGINE *tmpeng = NULL;
373         int pkey_id=0;
374         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
375         if (ameth)
376                 {
377                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
378                 }
379         if (tmpeng) ENGINE_finish(tmpeng);
380         return pkey_id;
381         }
382
383 #endif
384
385 void ssl_load_ciphers(void)
386         {
387         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
388                 EVP_get_cipherbyname(SN_des_cbc);
389         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
390                 EVP_get_cipherbyname(SN_des_ede3_cbc);
391         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
392                 EVP_get_cipherbyname(SN_rc4);
393         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
394                 EVP_get_cipherbyname(SN_rc2_cbc);
395 #ifndef OPENSSL_NO_IDEA
396         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
397                 EVP_get_cipherbyname(SN_idea_cbc);
398 #else
399         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
400 #endif
401         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
402           EVP_get_cipherbyname(SN_aes_128_cbc);
403         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
404           EVP_get_cipherbyname(SN_aes_256_cbc);
405         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
406           EVP_get_cipherbyname(SN_camellia_128_cbc);
407         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
408           EVP_get_cipherbyname(SN_camellia_256_cbc);
409         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
410           EVP_get_cipherbyname(SN_gost89_cnt);
411         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
412           EVP_get_cipherbyname(SN_seed_cbc);
413
414         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
415           EVP_get_cipherbyname(SN_aes_128_gcm);
416         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
417           EVP_get_cipherbyname(SN_aes_256_gcm);
418
419         ssl_digest_methods[SSL_MD_MD5_IDX]=
420                 EVP_get_digestbyname(SN_md5);
421         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
422                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
423         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
424         ssl_digest_methods[SSL_MD_SHA1_IDX]=
425                 EVP_get_digestbyname(SN_sha1);
426         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
427                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
428         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
429         ssl_digest_methods[SSL_MD_GOST94_IDX]=
430                 EVP_get_digestbyname(SN_id_GostR3411_94);
431         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
432                 {       
433                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
434                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
435                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
436                 }
437         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
438                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
439                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
440                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
441                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
442                 }               
443
444         ssl_digest_methods[SSL_MD_SHA256_IDX]=
445                 EVP_get_digestbyname(SN_sha256);
446         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
447                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
448         ssl_digest_methods[SSL_MD_SHA384_IDX]=
449                 EVP_get_digestbyname(SN_sha384);
450         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
451                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
452         }
453 #ifndef OPENSSL_NO_COMP
454
455 static int sk_comp_cmp(const SSL_COMP * const *a,
456                         const SSL_COMP * const *b)
457         {
458         return((*a)->id-(*b)->id);
459         }
460
461 static void load_builtin_compressions(void)
462         {
463         int got_write_lock = 0;
464
465         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
466         if (ssl_comp_methods == NULL)
467                 {
468                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
469                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
470                 got_write_lock = 1;
471                 
472                 if (ssl_comp_methods == NULL)
473                         {
474                         SSL_COMP *comp = NULL;
475
476                         MemCheck_off();
477                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
478                         if (ssl_comp_methods != NULL)
479                                 {
480                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
481                                 if (comp != NULL)
482                                         {
483                                         comp->method=COMP_zlib();
484                                         if (comp->method
485                                                 && comp->method->type == NID_undef)
486                                                 OPENSSL_free(comp);
487                                         else
488                                                 {
489                                                 comp->id=SSL_COMP_ZLIB_IDX;
490                                                 comp->name=comp->method->name;
491                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
492                                                 }
493                                         }
494                                         sk_SSL_COMP_sort(ssl_comp_methods);
495                                 }
496                         MemCheck_on();
497                         }
498                 }
499         
500         if (got_write_lock)
501                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
502         else
503                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
504         }
505 #endif
506
507 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
508              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp, int use_etm)
509         {
510         int i;
511         const SSL_CIPHER *c;
512
513         c=s->cipher;
514         if (c == NULL) return(0);
515         if (comp != NULL)
516                 {
517                 SSL_COMP ctmp;
518 #ifndef OPENSSL_NO_COMP
519                 load_builtin_compressions();
520 #endif
521
522                 *comp=NULL;
523                 ctmp.id=s->compress_meth;
524                 if (ssl_comp_methods != NULL)
525                         {
526                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
527                         if (i >= 0)
528                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
529                         else
530                                 *comp=NULL;
531                         }
532                 }
533
534         if ((enc == NULL) || (md == NULL)) return(0);
535
536         switch (c->algorithm_enc)
537                 {
538         case SSL_DES:
539                 i=SSL_ENC_DES_IDX;
540                 break;
541         case SSL_3DES:
542                 i=SSL_ENC_3DES_IDX;
543                 break;
544         case SSL_RC4:
545                 i=SSL_ENC_RC4_IDX;
546                 break;
547         case SSL_RC2:
548                 i=SSL_ENC_RC2_IDX;
549                 break;
550         case SSL_IDEA:
551                 i=SSL_ENC_IDEA_IDX;
552                 break;
553         case SSL_eNULL:
554                 i=SSL_ENC_NULL_IDX;
555                 break;
556         case SSL_AES128:
557                 i=SSL_ENC_AES128_IDX;
558                 break;
559         case SSL_AES256:
560                 i=SSL_ENC_AES256_IDX;
561                 break;
562         case SSL_CAMELLIA128:
563                 i=SSL_ENC_CAMELLIA128_IDX;
564                 break;
565         case SSL_CAMELLIA256:
566                 i=SSL_ENC_CAMELLIA256_IDX;
567                 break;
568         case SSL_eGOST2814789CNT:
569                 i=SSL_ENC_GOST89_IDX;
570                 break;
571         case SSL_SEED:
572                 i=SSL_ENC_SEED_IDX;
573                 break;
574         case SSL_AES128GCM:
575                 i=SSL_ENC_AES128GCM_IDX;
576                 break;
577         case SSL_AES256GCM:
578                 i=SSL_ENC_AES256GCM_IDX;
579                 break;
580         default:
581                 i= -1;
582                 break;
583                 }
584
585         if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
586                 *enc=NULL;
587         else
588                 {
589                 if (i == SSL_ENC_NULL_IDX)
590                         *enc=EVP_enc_null();
591                 else
592                         *enc=ssl_cipher_methods[i];
593                 }
594
595         switch (c->algorithm_mac)
596                 {
597         case SSL_MD5:
598                 i=SSL_MD_MD5_IDX;
599                 break;
600         case SSL_SHA1:
601                 i=SSL_MD_SHA1_IDX;
602                 break;
603         case SSL_SHA256:
604                 i=SSL_MD_SHA256_IDX;
605                 break;
606         case SSL_SHA384:
607                 i=SSL_MD_SHA384_IDX;
608                 break;
609         case SSL_GOST94:
610                 i = SSL_MD_GOST94_IDX;
611                 break;
612         case SSL_GOST89MAC:
613                 i = SSL_MD_GOST89MAC_IDX;
614                 break;
615         default:
616                 i= -1;
617                 break;
618                 }
619         if ((i < 0) || (i >= SSL_MD_NUM_IDX))
620         {
621                 *md=NULL; 
622                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
623                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
624                 if (c->algorithm_mac == SSL_AEAD)
625                         mac_pkey_type = NULL;
626         }
627         else
628         {
629                 *md=ssl_digest_methods[i];
630                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
631                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
632         }
633
634         if ((*enc != NULL) &&
635             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
636             (!mac_pkey_type||*mac_pkey_type != NID_undef))
637                 {
638                 const EVP_CIPHER *evp;
639
640                 if (use_etm)
641                         return 1;
642
643                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
644                     s->ssl_version < TLS1_VERSION)
645                         return 1;
646
647 #ifdef OPENSSL_FIPS
648                 if (FIPS_mode())
649                         return 1;
650 #endif
651
652                 if      (c->algorithm_enc == SSL_RC4 &&
653                          c->algorithm_mac == SSL_MD5 &&
654                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
655                         *enc = evp, *md = NULL;
656                 else if (c->algorithm_enc == SSL_AES128 &&
657                          c->algorithm_mac == SSL_SHA1 &&
658                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
659                         *enc = evp, *md = NULL;
660                 else if (c->algorithm_enc == SSL_AES256 &&
661                          c->algorithm_mac == SSL_SHA1 &&
662                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
663                         *enc = evp, *md = NULL;
664                 else if (c->algorithm_enc == SSL_AES128 &&
665                          c->algorithm_mac == SSL_SHA256 &&
666                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
667                         *enc = evp, *md = NULL;
668                 else if (c->algorithm_enc == SSL_AES256 &&
669                          c->algorithm_mac == SSL_SHA256 &&
670                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
671                         *enc = evp, *md = NULL;
672                 return(1);
673                 }
674         else
675                 return(0);
676         }
677
678 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
679 {
680         if (idx <0||idx>=SSL_MD_NUM_IDX) 
681                 {
682                 return 0;
683                 }
684         *mask = ssl_handshake_digest_flag[idx];
685         if (*mask)
686                 *md = ssl_digest_methods[idx];
687         else
688                 *md = NULL;
689         return 1;
690 }
691
692 #define ITEM_SEP(a) \
693         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
694
695 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
696              CIPHER_ORDER **tail)
697         {
698         if (curr == *tail) return;
699         if (curr == *head)
700                 *head=curr->next;
701         if (curr->prev != NULL)
702                 curr->prev->next=curr->next;
703         if (curr->next != NULL)
704                 curr->next->prev=curr->prev;
705         (*tail)->next=curr;
706         curr->prev= *tail;
707         curr->next=NULL;
708         *tail=curr;
709         }
710
711 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
712              CIPHER_ORDER **tail)
713         {
714         if (curr == *head) return;
715         if (curr == *tail)
716                 *tail=curr->prev;
717         if (curr->next != NULL)
718                 curr->next->prev=curr->prev;
719         if (curr->prev != NULL)
720                 curr->prev->next=curr->next;
721         (*head)->prev=curr;
722         curr->next= *head;
723         curr->prev=NULL;
724         *head=curr;
725         }
726
727 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
728         {
729         *mkey = 0;
730         *auth = 0;
731         *enc = 0;
732         *mac = 0;
733         *ssl = 0;
734
735 #ifdef OPENSSL_NO_RSA
736         *mkey |= SSL_kRSA;
737         *auth |= SSL_aRSA;
738 #endif
739 #ifdef OPENSSL_NO_DSA
740         *auth |= SSL_aDSS;
741 #endif
742 #ifdef OPENSSL_NO_DH
743         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kDHE;
744         *auth |= SSL_aDH;
745 #endif
746 #ifdef OPENSSL_NO_KRB5
747         *mkey |= SSL_kKRB5;
748         *auth |= SSL_aKRB5;
749 #endif
750 #ifdef OPENSSL_NO_ECDSA
751         *auth |= SSL_aECDSA;
752 #endif
753 #ifdef OPENSSL_NO_ECDH
754         *mkey |= SSL_kECDHe|SSL_kECDHr;
755         *auth |= SSL_aECDH;
756 #endif
757 #ifdef OPENSSL_NO_PSK
758         *mkey |= SSL_kPSK;
759         *auth |= SSL_aPSK;
760 #endif
761 #ifdef OPENSSL_NO_SRP
762         *mkey |= SSL_kSRP;
763 #endif
764         /* Check for presence of GOST 34.10 algorithms, and if they
765          * do not present, disable  appropriate auth and key exchange */
766         if (!get_optional_pkey_id("gost94")) {
767                 *auth |= SSL_aGOST94;
768         }
769         if (!get_optional_pkey_id("gost2001")) {
770                 *auth |= SSL_aGOST01;
771         }
772         /* Disable GOST key exchange if no GOST signature algs are available * */
773         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
774                 *mkey |= SSL_kGOST;
775         }       
776 #ifdef SSL_FORBID_ENULL
777         *enc |= SSL_eNULL;
778 #endif
779                 
780
781
782         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
783         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
784         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
785         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
786         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
787         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
788         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
789         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
790         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
791         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
792         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
793         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
794         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
795
796         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
797         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
798         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
799         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
800         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
801         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
802
803         }
804
805 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
806                 int num_of_ciphers,
807                 unsigned long disabled_mkey, unsigned long disabled_auth,
808                 unsigned long disabled_enc, unsigned long disabled_mac,
809                 unsigned long disabled_ssl,
810                 CIPHER_ORDER *co_list,
811                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
812         {
813         int i, co_list_num;
814         const SSL_CIPHER *c;
815
816         /*
817          * We have num_of_ciphers descriptions compiled in, depending on the
818          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
819          * These will later be sorted in a linked list with at most num
820          * entries.
821          */
822
823         /* Get the initial list of ciphers */
824         co_list_num = 0;        /* actual count of ciphers */
825         for (i = 0; i < num_of_ciphers; i++)
826                 {
827                 c = ssl_method->get_cipher(i);
828                 /* drop those that use any of that is not available */
829                 if ((c != NULL) && c->valid &&
830 #ifdef OPENSSL_FIPS
831                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
832 #endif
833                     !(c->algorithm_mkey & disabled_mkey) &&
834                     !(c->algorithm_auth & disabled_auth) &&
835                     !(c->algorithm_enc & disabled_enc) &&
836                     !(c->algorithm_mac & disabled_mac) &&
837                     !(c->algorithm_ssl & disabled_ssl))
838                         {
839                         co_list[co_list_num].cipher = c;
840                         co_list[co_list_num].next = NULL;
841                         co_list[co_list_num].prev = NULL;
842                         co_list[co_list_num].active = 0;
843                         co_list_num++;
844 #ifdef KSSL_DEBUG
845                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
846 #endif  /* KSSL_DEBUG */
847                         /*
848                         if (!sk_push(ca_list,(char *)c)) goto err;
849                         */
850                         }
851                 }
852
853         /*
854          * Prepare linked list from list entries
855          */     
856         if (co_list_num > 0)
857                 {
858                 co_list[0].prev = NULL;
859
860                 if (co_list_num > 1)
861                         {
862                         co_list[0].next = &co_list[1];
863                         
864                         for (i = 1; i < co_list_num - 1; i++)
865                                 {
866                                 co_list[i].prev = &co_list[i - 1];
867                                 co_list[i].next = &co_list[i + 1];
868                                 }
869
870                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
871                         }
872                 
873                 co_list[co_list_num - 1].next = NULL;
874
875                 *head_p = &co_list[0];
876                 *tail_p = &co_list[co_list_num - 1];
877                 }
878         }
879
880 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
881                         int num_of_group_aliases,
882                         unsigned long disabled_mkey, unsigned long disabled_auth,
883                         unsigned long disabled_enc, unsigned long disabled_mac,
884                         unsigned long disabled_ssl,
885                         CIPHER_ORDER *head)
886         {
887         CIPHER_ORDER *ciph_curr;
888         const SSL_CIPHER **ca_curr;
889         int i;
890         unsigned long mask_mkey = ~disabled_mkey;
891         unsigned long mask_auth = ~disabled_auth;
892         unsigned long mask_enc = ~disabled_enc;
893         unsigned long mask_mac = ~disabled_mac;
894         unsigned long mask_ssl = ~disabled_ssl;
895
896         /*
897          * First, add the real ciphers as already collected
898          */
899         ciph_curr = head;
900         ca_curr = ca_list;
901         while (ciph_curr != NULL)
902                 {
903                 *ca_curr = ciph_curr->cipher;
904                 ca_curr++;
905                 ciph_curr = ciph_curr->next;
906                 }
907
908         /*
909          * Now we add the available ones from the cipher_aliases[] table.
910          * They represent either one or more algorithms, some of which
911          * in any affected category must be supported (set in enabled_mask),
912          * or represent a cipher strength value (will be added in any case because algorithms=0).
913          */
914         for (i = 0; i < num_of_group_aliases; i++)
915                 {
916                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
917                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
918                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
919                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
920                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
921
922                 if (algorithm_mkey)
923                         if ((algorithm_mkey & mask_mkey) == 0)
924                                 continue;
925         
926                 if (algorithm_auth)
927                         if ((algorithm_auth & mask_auth) == 0)
928                                 continue;
929                 
930                 if (algorithm_enc)
931                         if ((algorithm_enc & mask_enc) == 0)
932                                 continue;
933                 
934                 if (algorithm_mac)
935                         if ((algorithm_mac & mask_mac) == 0)
936                                 continue;
937                 
938                 if (algorithm_ssl)
939                         if ((algorithm_ssl & mask_ssl) == 0)
940                                 continue;
941                 
942                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
943                 ca_curr++;
944                 }
945
946         *ca_curr = NULL;        /* end of list */
947         }
948
949 static void ssl_cipher_apply_rule(unsigned long cipher_id,
950                 unsigned long alg_mkey, unsigned long alg_auth,
951                 unsigned long alg_enc, unsigned long alg_mac,
952                 unsigned long alg_ssl,
953                 unsigned long algo_strength,
954                 int rule, int strength_bits,
955                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
956         {
957         CIPHER_ORDER *head, *tail, *curr, *next, *last;
958         const SSL_CIPHER *cp;
959         int reverse = 0;
960
961 #ifdef CIPHER_DEBUG
962         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
963                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
964 #endif
965
966         if (rule == CIPHER_DEL)
967                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
968
969         head = *head_p;
970         tail = *tail_p;
971
972         if (reverse)
973                 {
974                 next = tail;
975                 last = head;
976                 }
977         else
978                 {
979                 next = head;
980                 last = tail;
981                 }
982
983         curr = NULL;
984         for (;;)
985                 {
986                 if (curr == last) break;
987
988                 curr = next;
989
990                 if (curr == NULL) break;
991
992                 next = reverse ? curr->prev : curr->next;
993
994                 cp = curr->cipher;
995
996                 /*
997                  * Selection criteria is either the value of strength_bits
998                  * or the algorithms used.
999                  */
1000                 if (strength_bits >= 0)
1001                         {
1002                         if (strength_bits != cp->strength_bits)
1003                                 continue;
1004                         }
1005                 else
1006                         {
1007 #ifdef CIPHER_DEBUG
1008                         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);
1009 #endif
1010 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1011                         if (cipher_id && cipher_id != cp->id)
1012                                 continue;
1013 #endif
1014                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1015                                 continue;
1016                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
1017                                 continue;
1018                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
1019                                 continue;
1020                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
1021                                 continue;
1022                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1023                                 continue;
1024                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1025                                 continue;
1026                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1027                                 continue;
1028                         }
1029
1030 #ifdef CIPHER_DEBUG
1031                 printf("Action = %d\n", rule);
1032 #endif
1033
1034                 /* add the cipher if it has not been added yet. */
1035                 if (rule == CIPHER_ADD)
1036                         {
1037                         /* reverse == 0 */
1038                         if (!curr->active)
1039                                 {
1040                                 ll_append_tail(&head, curr, &tail);
1041                                 curr->active = 1;
1042                                 }
1043                         }
1044                 /* Move the added cipher to this location */
1045                 else if (rule == CIPHER_ORD)
1046                         {
1047                         /* reverse == 0 */
1048                         if (curr->active)
1049                                 {
1050                                 ll_append_tail(&head, curr, &tail);
1051                                 }
1052                         }
1053                 else if (rule == CIPHER_DEL)
1054                         {
1055                         /* reverse == 1 */
1056                         if (curr->active)
1057                                 {
1058                                 /* most recently deleted ciphersuites get best positions
1059                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1060                                  * works in reverse to maintain the order) */
1061                                 ll_append_head(&head, curr, &tail);
1062                                 curr->active = 0;
1063                                 }
1064                         }
1065                 else if (rule == CIPHER_KILL)
1066                         {
1067                         /* reverse == 0 */
1068                         if (head == curr)
1069                                 head = curr->next;
1070                         else
1071                                 curr->prev->next = curr->next;
1072                         if (tail == curr)
1073                                 tail = curr->prev;
1074                         curr->active = 0;
1075                         if (curr->next != NULL)
1076                                 curr->next->prev = curr->prev;
1077                         if (curr->prev != NULL)
1078                                 curr->prev->next = curr->next;
1079                         curr->next = NULL;
1080                         curr->prev = NULL;
1081                         }
1082                 }
1083
1084         *head_p = head;
1085         *tail_p = tail;
1086         }
1087
1088 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1089                                     CIPHER_ORDER **tail_p)
1090         {
1091         int max_strength_bits, i, *number_uses;
1092         CIPHER_ORDER *curr;
1093
1094         /*
1095          * This routine sorts the ciphers with descending strength. The sorting
1096          * must keep the pre-sorted sequence, so we apply the normal sorting
1097          * routine as '+' movement to the end of the list.
1098          */
1099         max_strength_bits = 0;
1100         curr = *head_p;
1101         while (curr != NULL)
1102                 {
1103                 if (curr->active &&
1104                     (curr->cipher->strength_bits > max_strength_bits))
1105                     max_strength_bits = curr->cipher->strength_bits;
1106                 curr = curr->next;
1107                 }
1108
1109         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1110         if (!number_uses)
1111                 {
1112                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1113                 return(0);
1114                 }
1115         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1116
1117         /*
1118          * Now find the strength_bits values actually used
1119          */
1120         curr = *head_p;
1121         while (curr != NULL)
1122                 {
1123                 if (curr->active)
1124                         number_uses[curr->cipher->strength_bits]++;
1125                 curr = curr->next;
1126                 }
1127         /*
1128          * Go through the list of used strength_bits values in descending
1129          * order.
1130          */
1131         for (i = max_strength_bits; i >= 0; i--)
1132                 if (number_uses[i] > 0)
1133                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1134
1135         OPENSSL_free(number_uses);
1136         return(1);
1137         }
1138
1139 static int ssl_cipher_process_rulestr(const char *rule_str,
1140                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1141                 const SSL_CIPHER **ca_list, CERT *c)
1142         {
1143         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1144         const char *l, *buf;
1145         int j, multi, found, rule, retval, ok, buflen;
1146         unsigned long cipher_id = 0;
1147         char ch;
1148
1149         retval = 1;
1150         l = rule_str;
1151         for (;;)
1152                 {
1153                 ch = *l;
1154
1155                 if (ch == '\0')
1156                         break;          /* done */
1157                 if (ch == '-')
1158                         { rule = CIPHER_DEL; l++; }
1159                 else if (ch == '+')
1160                         { rule = CIPHER_ORD; l++; }
1161                 else if (ch == '!')
1162                         { rule = CIPHER_KILL; l++; }
1163                 else if (ch == '@')
1164                         { rule = CIPHER_SPECIAL; l++; }
1165                 else
1166                         { rule = CIPHER_ADD; }
1167
1168                 if (ITEM_SEP(ch))
1169                         {
1170                         l++;
1171                         continue;
1172                         }
1173
1174                 alg_mkey = 0;
1175                 alg_auth = 0;
1176                 alg_enc = 0;
1177                 alg_mac = 0;
1178                 alg_ssl = 0;
1179                 algo_strength = 0;
1180
1181                 for (;;)
1182                         {
1183                         ch = *l;
1184                         buf = l;
1185                         buflen = 0;
1186 #ifndef CHARSET_EBCDIC
1187                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1188                                 ((ch >= '0') && (ch <= '9')) ||
1189                                 ((ch >= 'a') && (ch <= 'z')) ||
1190                                  (ch == '-') || (ch == '.')  ||
1191                                  (ch == '='))
1192 #else
1193                         while ( isalnum(ch) || (ch == '-') || (ch == '.') ||
1194                                 (ch == '='))
1195 #endif
1196                                  {
1197                                  ch = *(++l);
1198                                  buflen++;
1199                                  }
1200
1201                         if (buflen == 0)
1202                                 {
1203                                 /*
1204                                  * We hit something we cannot deal with,
1205                                  * it is no command or separator nor
1206                                  * alphanumeric, so we call this an error.
1207                                  */
1208                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1209                                        SSL_R_INVALID_COMMAND);
1210                                 retval = found = 0;
1211                                 l++;
1212                                 break;
1213                                 }
1214
1215                         if (rule == CIPHER_SPECIAL)
1216                                 {
1217                                 found = 0; /* unused -- avoid compiler warning */
1218                                 break;  /* special treatment */
1219                                 }
1220
1221                         /* check for multi-part specification */
1222                         if (ch == '+')
1223                                 {
1224                                 multi=1;
1225                                 l++;
1226                                 }
1227                         else
1228                                 multi=0;
1229
1230                         /*
1231                          * Now search for the cipher alias in the ca_list. Be careful
1232                          * with the strncmp, because the "buflen" limitation
1233                          * will make the rule "ADH:SOME" and the cipher
1234                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1235                          * So additionally check whether the cipher name found
1236                          * has the correct length. We can save a strlen() call:
1237                          * just checking for the '\0' at the right place is
1238                          * sufficient, we have to strncmp() anyway. (We cannot
1239                          * use strcmp(), because buf is not '\0' terminated.)
1240                          */
1241                         j = found = 0;
1242                         cipher_id = 0;
1243                         while (ca_list[j])
1244                                 {
1245                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1246                                     (ca_list[j]->name[buflen] == '\0'))
1247                                         {
1248                                         found = 1;
1249                                         break;
1250                                         }
1251                                 else
1252                                         j++;
1253                                 }
1254
1255                         if (!found)
1256                                 break;  /* ignore this entry */
1257
1258                         if (ca_list[j]->algorithm_mkey)
1259                                 {
1260                                 if (alg_mkey)
1261                                         {
1262                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1263                                         if (!alg_mkey) { found = 0; break; }
1264                                         }
1265                                 else
1266                                         alg_mkey = ca_list[j]->algorithm_mkey;
1267                                 }
1268
1269                         if (ca_list[j]->algorithm_auth)
1270                                 {
1271                                 if (alg_auth)
1272                                         {
1273                                         alg_auth &= ca_list[j]->algorithm_auth;
1274                                         if (!alg_auth) { found = 0; break; }
1275                                         }
1276                                 else
1277                                         alg_auth = ca_list[j]->algorithm_auth;
1278                                 }
1279                         
1280                         if (ca_list[j]->algorithm_enc)
1281                                 {
1282                                 if (alg_enc)
1283                                         {
1284                                         alg_enc &= ca_list[j]->algorithm_enc;
1285                                         if (!alg_enc) { found = 0; break; }
1286                                         }
1287                                 else
1288                                         alg_enc = ca_list[j]->algorithm_enc;
1289                                 }
1290                                                 
1291                         if (ca_list[j]->algorithm_mac)
1292                                 {
1293                                 if (alg_mac)
1294                                         {
1295                                         alg_mac &= ca_list[j]->algorithm_mac;
1296                                         if (!alg_mac) { found = 0; break; }
1297                                         }
1298                                 else
1299                                         alg_mac = ca_list[j]->algorithm_mac;
1300                                 }
1301                         
1302                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1303                                 {
1304                                 if (algo_strength & SSL_EXP_MASK)
1305                                         {
1306                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1307                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1308                                         }
1309                                 else
1310                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1311                                 }
1312
1313                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1314                                 {
1315                                 if (algo_strength & SSL_STRONG_MASK)
1316                                         {
1317                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1318                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1319                                         }
1320                                 else
1321                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1322                                 }
1323                         
1324                         if (ca_list[j]->valid)
1325                                 {
1326                                 /* explicit ciphersuite found; its protocol version
1327                                  * does not become part of the search pattern!*/
1328
1329                                 cipher_id = ca_list[j]->id;
1330                                 }
1331                         else
1332                                 {
1333                                 /* not an explicit ciphersuite; only in this case, the
1334                                  * protocol version is considered part of the search pattern */
1335
1336                                 if (ca_list[j]->algorithm_ssl)
1337                                         {
1338                                         if (alg_ssl)
1339                                                 {
1340                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1341                                                 if (!alg_ssl) { found = 0; break; }
1342                                                 }
1343                                         else
1344                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1345                                         }
1346                                 }
1347                         
1348                         if (!multi) break;
1349                         }
1350
1351                 /*
1352                  * Ok, we have the rule, now apply it
1353                  */
1354                 if (rule == CIPHER_SPECIAL)
1355                         {       /* special command */
1356                         ok = 0;
1357                         if ((buflen == 8) &&
1358                                 !strncmp(buf, "STRENGTH", 8))
1359                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1360                         else if (buflen == 10 && !strncmp(buf, "SECLEVEL=", 9))
1361                                 {
1362                                 int level = buf[9] - '0';
1363                                 if (level < 0 || level > 5)
1364                                         {
1365                                         SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1366                                                 SSL_R_INVALID_COMMAND);
1367                                         }
1368                                 else
1369                                         {
1370                                         c->sec_level = level;
1371                                         ok = 1;
1372                                         }
1373                                 }
1374                         else
1375                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1376                                         SSL_R_INVALID_COMMAND);
1377                         if (ok == 0)
1378                                 retval = 0;
1379                         /*
1380                          * We do not support any "multi" options
1381                          * together with "@", so throw away the
1382                          * rest of the command, if any left, until
1383                          * end or ':' is found.
1384                          */
1385                         while ((*l != '\0') && !ITEM_SEP(*l))
1386                                 l++;
1387                         }
1388                 else if (found)
1389                         {
1390                         ssl_cipher_apply_rule(cipher_id,
1391                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1392                                 rule, -1, head_p, tail_p);
1393                         }
1394                 else
1395                         {
1396                         while ((*l != '\0') && !ITEM_SEP(*l))
1397                                 l++;
1398                         }
1399                 if (*l == '\0') break; /* done */
1400                 }
1401
1402         return(retval);
1403         }
1404 #ifndef OPENSSL_NO_EC
1405 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1406                                         const char **prule_str)
1407         {
1408         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1409         if (!strcmp(*prule_str, "SUITEB128"))
1410                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1411         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1412                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1413         else if (!strcmp(*prule_str, "SUITEB128C2"))
1414                 {
1415                 suiteb_comb2 = 1;
1416                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1417                 }
1418         else if (!strcmp(*prule_str, "SUITEB192"))
1419                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1420
1421         if (suiteb_flags)
1422                 {
1423                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1424                 c->cert_flags |= suiteb_flags;
1425                 }
1426         else
1427                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1428
1429         if (!suiteb_flags)
1430                 return 1;
1431         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1432
1433         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1434                 {
1435                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1436                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1437                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1438                 else
1439                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1440                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1441                 return 0;
1442                 }
1443
1444         switch(suiteb_flags)
1445                 {
1446         case SSL_CERT_FLAG_SUITEB_128_LOS:
1447                 if (suiteb_comb2)
1448                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1449                 else
1450                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1451                 break;
1452         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1453                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1454                 break;
1455         case SSL_CERT_FLAG_SUITEB_192_LOS:
1456                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1457                 break;
1458                 }
1459         /* Set auto ECDH parameter determination */
1460         c->ecdh_tmp_auto = 1;
1461         return 1;
1462         }
1463 #endif
1464
1465 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1466                 STACK_OF(SSL_CIPHER) **cipher_list,
1467                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1468                 const char *rule_str, CERT *c)
1469         {
1470         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1471         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1472         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1473         const char *rule_p;
1474         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1475         const SSL_CIPHER **ca_list = NULL;
1476
1477         /*
1478          * Return with error if nothing to do.
1479          */
1480         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1481                 return NULL;
1482 #ifndef OPENSSL_NO_EC
1483         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1484                 return NULL;
1485 #endif
1486
1487         /*
1488          * To reduce the work to do we only want to process the compiled
1489          * in algorithms, so we first get the mask of disabled ciphers.
1490          */
1491         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1492
1493         /*
1494          * Now we have to collect the available ciphers from the compiled
1495          * in ciphers. We cannot get more than the number compiled in, so
1496          * it is used for allocation.
1497          */
1498         num_of_ciphers = ssl_method->num_ciphers();
1499 #ifdef KSSL_DEBUG
1500         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1501 #endif    /* KSSL_DEBUG */
1502         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1503         if (co_list == NULL)
1504                 {
1505                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1506                 return(NULL);   /* Failure */
1507                 }
1508
1509         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1510                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1511                                    co_list, &head, &tail);
1512
1513
1514         /* Now arrange all ciphers by preference: */
1515
1516         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1517         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1518         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1519
1520         /* AES is our preferred symmetric cipher */
1521         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1522
1523         /* Temporarily enable everything else for sorting */
1524         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1525
1526         /* Low priority for MD5 */
1527         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1528
1529         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1530          * (For applications that allow them, they aren't too bad, but we prefer
1531          * authenticated ciphers.) */
1532         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1533
1534         /* Move ciphers without forward secrecy to the end */
1535         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1536         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1537         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1538         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1539         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1540
1541         /* RC4 is sort-of broken -- move the the end */
1542         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1543
1544         /* Now sort by symmetric encryption strength.  The above ordering remains
1545          * in force within each class */
1546         if (!ssl_cipher_strength_sort(&head, &tail))
1547                 {
1548                 OPENSSL_free(co_list);
1549                 return NULL;
1550                 }
1551
1552         /* Now disable everything (maintaining the ordering!) */
1553         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1554
1555
1556         /*
1557          * We also need cipher aliases for selecting based on the rule_str.
1558          * There might be two types of entries in the rule_str: 1) names
1559          * of ciphers themselves 2) aliases for groups of ciphers.
1560          * For 1) we need the available ciphers and for 2) the cipher
1561          * groups of cipher_aliases added together in one list (otherwise
1562          * we would be happy with just the cipher_aliases table).
1563          */
1564         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1565         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1566         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1567         if (ca_list == NULL)
1568                 {
1569                 OPENSSL_free(co_list);
1570                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1571                 return(NULL);   /* Failure */
1572                 }
1573         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1574                                    disabled_mkey, disabled_auth, disabled_enc,
1575                                    disabled_mac, disabled_ssl, head);
1576
1577         /*
1578          * If the rule_string begins with DEFAULT, apply the default rule
1579          * before using the (possibly available) additional rules.
1580          */
1581         ok = 1;
1582         rule_p = rule_str;
1583         if (strncmp(rule_str,"DEFAULT",7) == 0)
1584                 {
1585                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1586                         &head, &tail, ca_list, c);
1587                 rule_p += 7;
1588                 if (*rule_p == ':')
1589                         rule_p++;
1590                 }
1591
1592         if (ok && (strlen(rule_p) > 0))
1593                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1594
1595         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1596
1597         if (!ok)
1598                 {       /* Rule processing failure */
1599                 OPENSSL_free(co_list);
1600                 return(NULL);
1601                 }
1602         
1603         /*
1604          * Allocate new "cipherstack" for the result, return with error
1605          * if we cannot get one.
1606          */
1607         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1608                 {
1609                 OPENSSL_free(co_list);
1610                 return(NULL);
1611                 }
1612
1613         /*
1614          * The cipher selection for the list is done. The ciphers are added
1615          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1616          */
1617         for (curr = head; curr != NULL; curr = curr->next)
1618                 {
1619 #ifdef OPENSSL_FIPS
1620                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1621 #else
1622                 if (curr->active)
1623 #endif
1624                         {
1625                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1626 #ifdef CIPHER_DEBUG
1627                         printf("<%s>\n",curr->cipher->name);
1628 #endif
1629                         }
1630                 }
1631         OPENSSL_free(co_list);  /* Not needed any longer */
1632
1633         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1634         if (tmp_cipher_list == NULL)
1635                 {
1636                 sk_SSL_CIPHER_free(cipherstack);
1637                 return NULL;
1638                 }
1639         if (*cipher_list != NULL)
1640                 sk_SSL_CIPHER_free(*cipher_list);
1641         *cipher_list = cipherstack;
1642         if (*cipher_list_by_id != NULL)
1643                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1644         *cipher_list_by_id = tmp_cipher_list;
1645         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1646
1647         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1648         return(cipherstack);
1649         }
1650
1651 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1652         {
1653         int is_export,pkl,kl;
1654         const char *ver,*exp_str;
1655         const char *kx,*au,*enc,*mac;
1656         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1657 #ifdef KSSL_DEBUG
1658         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1659 #else
1660         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1661 #endif /* KSSL_DEBUG */
1662
1663         alg_mkey = cipher->algorithm_mkey;
1664         alg_auth = cipher->algorithm_auth;
1665         alg_enc = cipher->algorithm_enc;
1666         alg_mac = cipher->algorithm_mac;
1667         alg_ssl = cipher->algorithm_ssl;
1668
1669         alg2=cipher->algorithm2;
1670
1671         is_export=SSL_C_IS_EXPORT(cipher);
1672         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1673         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1674         exp_str=is_export?" export":"";
1675         
1676         if (alg_ssl & SSL_SSLV2)
1677                 ver="SSLv2";
1678         else if (alg_ssl & SSL_SSLV3)
1679                 ver="SSLv3";
1680         else if (alg_ssl & SSL_TLSV1_2)
1681                 ver="TLSv1.2";
1682         else
1683                 ver="unknown";
1684
1685         switch (alg_mkey)
1686                 {
1687         case SSL_kRSA:
1688                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1689                 break;
1690         case SSL_kDHr:
1691                 kx="DH/RSA";
1692                 break;
1693         case SSL_kDHd:
1694                 kx="DH/DSS";
1695                 break;
1696         case SSL_kKRB5:
1697                 kx="KRB5";
1698                 break;
1699         case SSL_kDHE:
1700                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1701                 break;
1702         case SSL_kECDHr:
1703                 kx="ECDH/RSA";
1704                 break;
1705         case SSL_kECDHe:
1706                 kx="ECDH/ECDSA";
1707                 break;
1708         case SSL_kECDHE:
1709                 kx="ECDH";
1710                 break;
1711         case SSL_kPSK:
1712                 kx="PSK";
1713                 break;
1714         case SSL_kSRP:
1715                 kx="SRP";
1716                 break;
1717         case SSL_kGOST:
1718                 kx="GOST";
1719                 break;
1720         default:
1721                 kx="unknown";
1722                 }
1723
1724         switch (alg_auth)
1725                 {
1726         case SSL_aRSA:
1727                 au="RSA";
1728                 break;
1729         case SSL_aDSS:
1730                 au="DSS";
1731                 break;
1732         case SSL_aDH:
1733                 au="DH";
1734                 break;
1735         case SSL_aKRB5:
1736                 au="KRB5";
1737                 break;
1738         case SSL_aECDH:
1739                 au="ECDH";
1740                 break;
1741         case SSL_aNULL:
1742                 au="None";
1743                 break;
1744         case SSL_aECDSA:
1745                 au="ECDSA";
1746                 break;
1747         case SSL_aPSK:
1748                 au="PSK";
1749                 break;
1750         case SSL_aSRP:
1751                 au="SRP";
1752                 break;
1753         case SSL_aGOST94:
1754                 au="GOST94";
1755                 break;
1756         case SSL_aGOST01:
1757                 au="GOST01";
1758                 break;
1759         default:
1760                 au="unknown";
1761                 break;
1762                 }
1763
1764         switch (alg_enc)
1765                 {
1766         case SSL_DES:
1767                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1768                 break;
1769         case SSL_3DES:
1770                 enc="3DES(168)";
1771                 break;
1772         case SSL_RC4:
1773                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1774                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1775                 break;
1776         case SSL_RC2:
1777                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1778                 break;
1779         case SSL_IDEA:
1780                 enc="IDEA(128)";
1781                 break;
1782         case SSL_eNULL:
1783                 enc="None";
1784                 break;
1785         case SSL_AES128:
1786                 enc="AES(128)";
1787                 break;
1788         case SSL_AES256:
1789                 enc="AES(256)";
1790                 break;
1791         case SSL_AES128GCM:
1792                 enc="AESGCM(128)";
1793                 break;
1794         case SSL_AES256GCM:
1795                 enc="AESGCM(256)";
1796                 break;
1797         case SSL_CAMELLIA128:
1798                 enc="Camellia(128)";
1799                 break;
1800         case SSL_CAMELLIA256:
1801                 enc="Camellia(256)";
1802                 break;
1803         case SSL_SEED:
1804                 enc="SEED(128)";
1805                 break;
1806         case SSL_eGOST2814789CNT:
1807                 enc="GOST89(256)";
1808                 break;
1809         default:
1810                 enc="unknown";
1811                 break;
1812                 }
1813
1814         switch (alg_mac)
1815                 {
1816         case SSL_MD5:
1817                 mac="MD5";
1818                 break;
1819         case SSL_SHA1:
1820                 mac="SHA1";
1821                 break;
1822         case SSL_SHA256:
1823                 mac="SHA256";
1824                 break;
1825         case SSL_SHA384:
1826                 mac="SHA384";
1827                 break;
1828         case SSL_AEAD:
1829                 mac="AEAD";
1830                 break;
1831         case SSL_GOST89MAC:
1832                 mac="GOST89";
1833                 break;
1834         case SSL_GOST94:
1835                 mac="GOST94";
1836                 break;
1837         default:
1838                 mac="unknown";
1839                 break;
1840                 }
1841
1842         if (buf == NULL)
1843                 {
1844                 len=128;
1845                 buf=OPENSSL_malloc(len);
1846                 if (buf == NULL) return("OPENSSL_malloc Error");
1847                 }
1848         else if (len < 128)
1849                 return("Buffer too small");
1850
1851 #ifdef KSSL_DEBUG
1852         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1853 #else
1854         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1855 #endif /* KSSL_DEBUG */
1856         return(buf);
1857         }
1858
1859 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1860         {
1861         int i;
1862
1863         if (c == NULL) return("(NONE)");
1864         i=(int)(c->id>>24L);
1865         if (i == 3)
1866                 return("TLSv1/SSLv3");
1867         else if (i == 2)
1868                 return("SSLv2");
1869         else
1870                 return("unknown");
1871         }
1872
1873 /* return the actual cipher being used */
1874 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1875         {
1876         if (c != NULL)
1877                 return(c->name);
1878         return("(NONE)");
1879         }
1880
1881 /* number of bits for symmetric cipher */
1882 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1883         {
1884         int ret=0;
1885
1886         if (c != NULL)
1887                 {
1888                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1889                 ret = c->strength_bits;
1890                 }
1891         return(ret);
1892         }
1893
1894 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1895         {
1896         return c->id;
1897         }
1898
1899 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1900         {
1901         SSL_COMP *ctmp;
1902         int i,nn;
1903
1904         if ((n == 0) || (sk == NULL)) return(NULL);
1905         nn=sk_SSL_COMP_num(sk);
1906         for (i=0; i<nn; i++)
1907                 {
1908                 ctmp=sk_SSL_COMP_value(sk,i);
1909                 if (ctmp->id == n)
1910                         return(ctmp);
1911                 }
1912         return(NULL);
1913         }
1914
1915 #ifdef OPENSSL_NO_COMP
1916 void *SSL_COMP_get_compression_methods(void)
1917         {
1918         return NULL;
1919         }
1920 int SSL_COMP_add_compression_method(int id, void *cm)
1921         {
1922         return 1;
1923         }
1924
1925 const char *SSL_COMP_get_name(const void *comp)
1926         {
1927         return NULL;
1928         }
1929 #else
1930 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1931         {
1932         load_builtin_compressions();
1933         return(ssl_comp_methods);
1934         }
1935
1936 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1937         {
1938         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1939         ssl_comp_methods = meths;
1940         return old_meths;
1941         }
1942
1943 static void cmeth_free(SSL_COMP *cm)
1944         {
1945         OPENSSL_free(cm);
1946         }
1947
1948 void SSL_COMP_free_compression_methods(void)
1949         {
1950         STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1951         ssl_comp_methods = NULL;
1952         sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1953         }
1954
1955 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1956         {
1957         SSL_COMP *comp;
1958
1959         if (cm == NULL || cm->type == NID_undef)
1960                 return 1;
1961
1962         /* According to draft-ietf-tls-compression-04.txt, the
1963            compression number ranges should be the following:
1964
1965            0 to 63:    methods defined by the IETF
1966            64 to 192:  external party methods assigned by IANA
1967            193 to 255: reserved for private use */
1968         if (id < 193 || id > 255)
1969                 {
1970                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1971                 return 0;
1972                 }
1973
1974         MemCheck_off();
1975         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1976         comp->id=id;
1977         comp->method=cm;
1978         load_builtin_compressions();
1979         if (ssl_comp_methods
1980                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1981                 {
1982                 OPENSSL_free(comp);
1983                 MemCheck_on();
1984                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1985                 return(1);
1986                 }
1987         else if ((ssl_comp_methods == NULL)
1988                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1989                 {
1990                 OPENSSL_free(comp);
1991                 MemCheck_on();
1992                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1993                 return(1);
1994                 }
1995         else
1996                 {
1997                 MemCheck_on();
1998                 return(0);
1999                 }
2000         }
2001
2002 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2003         {
2004         if (comp)
2005                 return comp->name;
2006         return NULL;
2007         }
2008 #endif
2009 /* For a cipher return the index corresponding to the certificate type */
2010 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
2011         {
2012         unsigned long alg_k, alg_a;
2013
2014         alg_k = c->algorithm_mkey;
2015         alg_a = c->algorithm_auth;
2016
2017         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2018                 {
2019                 /* we don't need to look at SSL_kECDHE
2020                  * since no certificate is needed for
2021                  * anon ECDH and for authenticated
2022                  * ECDHE, the check for the auth
2023                  * algorithm will set i correctly
2024                  * NOTE: For ECDH-RSA, we need an ECC
2025                  * not an RSA cert but for ECDHE-RSA
2026                  * we need an RSA cert. Placing the
2027                  * checks for SSL_kECDH before RSA
2028                  * checks ensures the correct cert is chosen.
2029                  */
2030                 return SSL_PKEY_ECC;
2031                 }
2032         else if (alg_a & SSL_aECDSA)
2033                 return SSL_PKEY_ECC;
2034         else if (alg_k & SSL_kDHr)
2035                 return SSL_PKEY_DH_RSA;
2036         else if (alg_k & SSL_kDHd)
2037                 return SSL_PKEY_DH_DSA;
2038         else if (alg_a & SSL_aDSS)
2039                 return SSL_PKEY_DSA_SIGN;
2040         else if (alg_a & SSL_aRSA)
2041                 return SSL_PKEY_RSA_ENC;
2042         else if (alg_a & SSL_aKRB5)
2043                 /* VRS something else here? */
2044                 return -1;
2045         else if (alg_a & SSL_aGOST94) 
2046                 return SSL_PKEY_GOST94;
2047         else if (alg_a & SSL_aGOST01)
2048                 return SSL_PKEY_GOST01;
2049         return -1;
2050         }
2051
2052 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2053         {
2054         const SSL_CIPHER *c;
2055         c = ssl->method->get_cipher_by_char(ptr);
2056         if (c == NULL || c->valid == 0)
2057                 return NULL;
2058         return c;
2059         }
2060
2061 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2062         {
2063         return ssl->method->get_cipher_by_char(ptr);
2064         }