Oops, get selection logic right.
[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 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
276         /* aliases combining key exchange and server authentication */
277         {0,SSL_TXT_EDH,0,     SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
278         {0,SSL_TXT_DHE,0,     SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
279         {0,SSL_TXT_EECDH,0,   SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
280         {0,SSL_TXT_ECDHE,0,   SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
281         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
282         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
283         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
284         {0,SSL_TXT_ADH,0,     SSL_kDHE,SSL_aNULL,0,0,0,0,0,0,0},
285         {0,SSL_TXT_AECDH,0,   SSL_kECDHE,SSL_aNULL,0,0,0,0,0,0,0},
286         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
287         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
288
289
290         /* symmetric encryption aliases */
291         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
292         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
293         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
294         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
295         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
296         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
297         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
298         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
299         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
300         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
301         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
302         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
303         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
304         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
305
306         /* MAC aliases */       
307         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
308         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
309         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
310         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
311         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
312         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
313         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
314
315         /* protocol version aliases */
316         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
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 #ifdef OPENSSL_FIPS
647                 if (FIPS_mode())
648                         return 1;
649 #endif
650
651                 if      (c->algorithm_enc == SSL_RC4 &&
652                          c->algorithm_mac == SSL_MD5 &&
653                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
654                         *enc = evp, *md = NULL;
655                 else if (c->algorithm_enc == SSL_AES128 &&
656                          c->algorithm_mac == SSL_SHA1 &&
657                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
658                         *enc = evp, *md = NULL;
659                 else if (c->algorithm_enc == SSL_AES256 &&
660                          c->algorithm_mac == SSL_SHA1 &&
661                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
662                         *enc = evp, *md = NULL;
663                 else if (c->algorithm_enc == SSL_AES128 &&
664                          c->algorithm_mac == SSL_SHA256 &&
665                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
666                         *enc = evp, *md = NULL;
667                 else if (c->algorithm_enc == SSL_AES256 &&
668                          c->algorithm_mac == SSL_SHA256 &&
669                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
670                         *enc = evp, *md = NULL;
671                 return(1);
672                 }
673         else
674                 return(0);
675         }
676
677 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
678 {
679         if (idx <0||idx>=SSL_MD_NUM_IDX) 
680                 {
681                 return 0;
682                 }
683         *mask = ssl_handshake_digest_flag[idx];
684         if (*mask)
685                 *md = ssl_digest_methods[idx];
686         else
687                 *md = NULL;
688         return 1;
689 }
690
691 #define ITEM_SEP(a) \
692         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
693
694 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
695              CIPHER_ORDER **tail)
696         {
697         if (curr == *tail) return;
698         if (curr == *head)
699                 *head=curr->next;
700         if (curr->prev != NULL)
701                 curr->prev->next=curr->next;
702         if (curr->next != NULL)
703                 curr->next->prev=curr->prev;
704         (*tail)->next=curr;
705         curr->prev= *tail;
706         curr->next=NULL;
707         *tail=curr;
708         }
709
710 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
711              CIPHER_ORDER **tail)
712         {
713         if (curr == *head) return;
714         if (curr == *tail)
715                 *tail=curr->prev;
716         if (curr->next != NULL)
717                 curr->next->prev=curr->prev;
718         if (curr->prev != NULL)
719                 curr->prev->next=curr->next;
720         (*head)->prev=curr;
721         curr->next= *head;
722         curr->prev=NULL;
723         *head=curr;
724         }
725
726 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
727         {
728         *mkey = 0;
729         *auth = 0;
730         *enc = 0;
731         *mac = 0;
732         *ssl = 0;
733
734 #ifdef OPENSSL_NO_RSA
735         *mkey |= SSL_kRSA;
736         *auth |= SSL_aRSA;
737 #endif
738 #ifdef OPENSSL_NO_DSA
739         *auth |= SSL_aDSS;
740 #endif
741 #ifdef OPENSSL_NO_DH
742         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kDHE;
743         *auth |= SSL_aDH;
744 #endif
745 #ifdef OPENSSL_NO_KRB5
746         *mkey |= SSL_kKRB5;
747         *auth |= SSL_aKRB5;
748 #endif
749 #ifdef OPENSSL_NO_ECDSA
750         *auth |= SSL_aECDSA;
751 #endif
752 #ifdef OPENSSL_NO_ECDH
753         *mkey |= SSL_kECDHe|SSL_kECDHr;
754         *auth |= SSL_aECDH;
755 #endif
756 #ifdef OPENSSL_NO_PSK
757         *mkey |= SSL_kPSK;
758         *auth |= SSL_aPSK;
759 #endif
760 #ifdef OPENSSL_NO_SRP
761         *mkey |= SSL_kSRP;
762 #endif
763         /* Check for presence of GOST 34.10 algorithms, and if they
764          * do not present, disable  appropriate auth and key exchange */
765         if (!get_optional_pkey_id("gost94")) {
766                 *auth |= SSL_aGOST94;
767         }
768         if (!get_optional_pkey_id("gost2001")) {
769                 *auth |= SSL_aGOST01;
770         }
771         /* Disable GOST key exchange if no GOST signature algs are available * */
772         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
773                 *mkey |= SSL_kGOST;
774         }       
775 #ifdef SSL_FORBID_ENULL
776         *enc |= SSL_eNULL;
777 #endif
778                 
779
780
781         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
782         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
783         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
784         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
785         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
786         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
787         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
788         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
789         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
790         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
791         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
792         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
793         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
794
795         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
796         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
797         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
798         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
799         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
800         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
801
802         }
803
804 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
805                 int num_of_ciphers,
806                 unsigned long disabled_mkey, unsigned long disabled_auth,
807                 unsigned long disabled_enc, unsigned long disabled_mac,
808                 unsigned long disabled_ssl,
809                 CIPHER_ORDER *co_list,
810                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
811         {
812         int i, co_list_num;
813         const SSL_CIPHER *c;
814
815         /*
816          * We have num_of_ciphers descriptions compiled in, depending on the
817          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
818          * These will later be sorted in a linked list with at most num
819          * entries.
820          */
821
822         /* Get the initial list of ciphers */
823         co_list_num = 0;        /* actual count of ciphers */
824         for (i = 0; i < num_of_ciphers; i++)
825                 {
826                 c = ssl_method->get_cipher(i);
827                 /* drop those that use any of that is not available */
828                 if ((c != NULL) && c->valid &&
829 #ifdef OPENSSL_FIPS
830                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
831 #endif
832                     !(c->algorithm_mkey & disabled_mkey) &&
833                     !(c->algorithm_auth & disabled_auth) &&
834                     !(c->algorithm_enc & disabled_enc) &&
835                     !(c->algorithm_mac & disabled_mac) &&
836                     !(c->algorithm_ssl & disabled_ssl))
837                         {
838                         co_list[co_list_num].cipher = c;
839                         co_list[co_list_num].next = NULL;
840                         co_list[co_list_num].prev = NULL;
841                         co_list[co_list_num].active = 0;
842                         co_list_num++;
843 #ifdef KSSL_DEBUG
844                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
845 #endif  /* KSSL_DEBUG */
846                         /*
847                         if (!sk_push(ca_list,(char *)c)) goto err;
848                         */
849                         }
850                 }
851
852         /*
853          * Prepare linked list from list entries
854          */     
855         if (co_list_num > 0)
856                 {
857                 co_list[0].prev = NULL;
858
859                 if (co_list_num > 1)
860                         {
861                         co_list[0].next = &co_list[1];
862                         
863                         for (i = 1; i < co_list_num - 1; i++)
864                                 {
865                                 co_list[i].prev = &co_list[i - 1];
866                                 co_list[i].next = &co_list[i + 1];
867                                 }
868
869                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
870                         }
871                 
872                 co_list[co_list_num - 1].next = NULL;
873
874                 *head_p = &co_list[0];
875                 *tail_p = &co_list[co_list_num - 1];
876                 }
877         }
878
879 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
880                         int num_of_group_aliases,
881                         unsigned long disabled_mkey, unsigned long disabled_auth,
882                         unsigned long disabled_enc, unsigned long disabled_mac,
883                         unsigned long disabled_ssl,
884                         CIPHER_ORDER *head)
885         {
886         CIPHER_ORDER *ciph_curr;
887         const SSL_CIPHER **ca_curr;
888         int i;
889         unsigned long mask_mkey = ~disabled_mkey;
890         unsigned long mask_auth = ~disabled_auth;
891         unsigned long mask_enc = ~disabled_enc;
892         unsigned long mask_mac = ~disabled_mac;
893         unsigned long mask_ssl = ~disabled_ssl;
894
895         /*
896          * First, add the real ciphers as already collected
897          */
898         ciph_curr = head;
899         ca_curr = ca_list;
900         while (ciph_curr != NULL)
901                 {
902                 *ca_curr = ciph_curr->cipher;
903                 ca_curr++;
904                 ciph_curr = ciph_curr->next;
905                 }
906
907         /*
908          * Now we add the available ones from the cipher_aliases[] table.
909          * They represent either one or more algorithms, some of which
910          * in any affected category must be supported (set in enabled_mask),
911          * or represent a cipher strength value (will be added in any case because algorithms=0).
912          */
913         for (i = 0; i < num_of_group_aliases; i++)
914                 {
915                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
916                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
917                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
918                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
919                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
920
921                 if (algorithm_mkey)
922                         if ((algorithm_mkey & mask_mkey) == 0)
923                                 continue;
924         
925                 if (algorithm_auth)
926                         if ((algorithm_auth & mask_auth) == 0)
927                                 continue;
928                 
929                 if (algorithm_enc)
930                         if ((algorithm_enc & mask_enc) == 0)
931                                 continue;
932                 
933                 if (algorithm_mac)
934                         if ((algorithm_mac & mask_mac) == 0)
935                                 continue;
936                 
937                 if (algorithm_ssl)
938                         if ((algorithm_ssl & mask_ssl) == 0)
939                                 continue;
940                 
941                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
942                 ca_curr++;
943                 }
944
945         *ca_curr = NULL;        /* end of list */
946         }
947
948 static void ssl_cipher_apply_rule(unsigned long cipher_id,
949                 unsigned long alg_mkey, unsigned long alg_auth,
950                 unsigned long alg_enc, unsigned long alg_mac,
951                 unsigned long alg_ssl,
952                 unsigned long algo_strength,
953                 int rule, int strength_bits,
954                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
955         {
956         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
957         const SSL_CIPHER *cp;
958         int reverse = 0;
959
960 #ifdef CIPHER_DEBUG
961         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
962                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
963 #endif
964
965         if (rule == CIPHER_DEL)
966                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
967
968         head = *head_p;
969         tail = *tail_p;
970
971         if (reverse)
972                 {
973                 curr = tail;
974                 last = head;
975                 }
976         else
977                 {
978                 curr = head;
979                 last = tail;
980                 }
981
982         curr2 = curr;
983         for (;;)
984                 {
985                 if ((curr == NULL) || (curr == last)) break;
986                 curr = curr2;
987                 curr2 = 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)
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 #else
1187                         while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1188 #endif
1189                                  {
1190                                  ch = *(++l);
1191                                  buflen++;
1192                                  }
1193
1194                         if (buflen == 0)
1195                                 {
1196                                 /*
1197                                  * We hit something we cannot deal with,
1198                                  * it is no command or separator nor
1199                                  * alphanumeric, so we call this an error.
1200                                  */
1201                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1202                                        SSL_R_INVALID_COMMAND);
1203                                 retval = found = 0;
1204                                 l++;
1205                                 break;
1206                                 }
1207
1208                         if (rule == CIPHER_SPECIAL)
1209                                 {
1210                                 found = 0; /* unused -- avoid compiler warning */
1211                                 break;  /* special treatment */
1212                                 }
1213
1214                         /* check for multi-part specification */
1215                         if (ch == '+')
1216                                 {
1217                                 multi=1;
1218                                 l++;
1219                                 }
1220                         else
1221                                 multi=0;
1222
1223                         /*
1224                          * Now search for the cipher alias in the ca_list. Be careful
1225                          * with the strncmp, because the "buflen" limitation
1226                          * will make the rule "ADH:SOME" and the cipher
1227                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1228                          * So additionally check whether the cipher name found
1229                          * has the correct length. We can save a strlen() call:
1230                          * just checking for the '\0' at the right place is
1231                          * sufficient, we have to strncmp() anyway. (We cannot
1232                          * use strcmp(), because buf is not '\0' terminated.)
1233                          */
1234                         j = found = 0;
1235                         cipher_id = 0;
1236                         while (ca_list[j])
1237                                 {
1238                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1239                                     (ca_list[j]->name[buflen] == '\0'))
1240                                         {
1241                                         found = 1;
1242                                         break;
1243                                         }
1244                                 else
1245                                         j++;
1246                                 }
1247
1248                         if (!found)
1249                                 break;  /* ignore this entry */
1250
1251                         if (ca_list[j]->algorithm_mkey)
1252                                 {
1253                                 if (alg_mkey)
1254                                         {
1255                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1256                                         if (!alg_mkey) { found = 0; break; }
1257                                         }
1258                                 else
1259                                         alg_mkey = ca_list[j]->algorithm_mkey;
1260                                 }
1261
1262                         if (ca_list[j]->algorithm_auth)
1263                                 {
1264                                 if (alg_auth)
1265                                         {
1266                                         alg_auth &= ca_list[j]->algorithm_auth;
1267                                         if (!alg_auth) { found = 0; break; }
1268                                         }
1269                                 else
1270                                         alg_auth = ca_list[j]->algorithm_auth;
1271                                 }
1272                         
1273                         if (ca_list[j]->algorithm_enc)
1274                                 {
1275                                 if (alg_enc)
1276                                         {
1277                                         alg_enc &= ca_list[j]->algorithm_enc;
1278                                         if (!alg_enc) { found = 0; break; }
1279                                         }
1280                                 else
1281                                         alg_enc = ca_list[j]->algorithm_enc;
1282                                 }
1283                                                 
1284                         if (ca_list[j]->algorithm_mac)
1285                                 {
1286                                 if (alg_mac)
1287                                         {
1288                                         alg_mac &= ca_list[j]->algorithm_mac;
1289                                         if (!alg_mac) { found = 0; break; }
1290                                         }
1291                                 else
1292                                         alg_mac = ca_list[j]->algorithm_mac;
1293                                 }
1294                         
1295                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1296                                 {
1297                                 if (algo_strength & SSL_EXP_MASK)
1298                                         {
1299                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1300                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1301                                         }
1302                                 else
1303                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1304                                 }
1305
1306                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1307                                 {
1308                                 if (algo_strength & SSL_STRONG_MASK)
1309                                         {
1310                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1311                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1312                                         }
1313                                 else
1314                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1315                                 }
1316                         
1317                         if (ca_list[j]->valid)
1318                                 {
1319                                 /* explicit ciphersuite found; its protocol version
1320                                  * does not become part of the search pattern!*/
1321
1322                                 cipher_id = ca_list[j]->id;
1323                                 }
1324                         else
1325                                 {
1326                                 /* not an explicit ciphersuite; only in this case, the
1327                                  * protocol version is considered part of the search pattern */
1328
1329                                 if (ca_list[j]->algorithm_ssl)
1330                                         {
1331                                         if (alg_ssl)
1332                                                 {
1333                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1334                                                 if (!alg_ssl) { found = 0; break; }
1335                                                 }
1336                                         else
1337                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1338                                         }
1339                                 }
1340                         
1341                         if (!multi) break;
1342                         }
1343
1344                 /*
1345                  * Ok, we have the rule, now apply it
1346                  */
1347                 if (rule == CIPHER_SPECIAL)
1348                         {       /* special command */
1349                         ok = 0;
1350                         if ((buflen == 8) &&
1351                                 !strncmp(buf, "STRENGTH", 8))
1352                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1353                         else
1354                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1355                                         SSL_R_INVALID_COMMAND);
1356                         if (ok == 0)
1357                                 retval = 0;
1358                         /*
1359                          * We do not support any "multi" options
1360                          * together with "@", so throw away the
1361                          * rest of the command, if any left, until
1362                          * end or ':' is found.
1363                          */
1364                         while ((*l != '\0') && !ITEM_SEP(*l))
1365                                 l++;
1366                         }
1367                 else if (found)
1368                         {
1369                         ssl_cipher_apply_rule(cipher_id,
1370                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1371                                 rule, -1, head_p, tail_p);
1372                         }
1373                 else
1374                         {
1375                         while ((*l != '\0') && !ITEM_SEP(*l))
1376                                 l++;
1377                         }
1378                 if (*l == '\0') break; /* done */
1379                 }
1380
1381         return(retval);
1382         }
1383 #ifndef OPENSSL_NO_EC
1384 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1385                                         const char **prule_str)
1386         {
1387         unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1388         if (!strcmp(*prule_str, "SUITEB128"))
1389                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1390         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1391                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1392         else if (!strcmp(*prule_str, "SUITEB128C2"))
1393                 {
1394                 suiteb_comb2 = 1;
1395                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1396                 }
1397         else if (!strcmp(*prule_str, "SUITEB192"))
1398                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1399
1400         if (suiteb_flags)
1401                 {
1402                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1403                 c->cert_flags |= suiteb_flags;
1404                 }
1405         else
1406                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1407
1408         if (!suiteb_flags)
1409                 return 1;
1410         /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1411
1412         if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1413                 {
1414                 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1415                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1416                                 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1417                 else
1418                         SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1419                                 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1420                 return 0;
1421                 }
1422
1423         switch(suiteb_flags)
1424                 {
1425         case SSL_CERT_FLAG_SUITEB_128_LOS:
1426                 if (suiteb_comb2)
1427                         *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1428                 else
1429                         *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1430                 break;
1431         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1432                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1433                 break;
1434         case SSL_CERT_FLAG_SUITEB_192_LOS:
1435                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1436                 break;
1437                 }
1438         /* Set auto ECDH parameter determination */
1439         c->ecdh_tmp_auto = 1;
1440         return 1;
1441         }
1442 #endif
1443
1444
1445 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1446                 STACK_OF(SSL_CIPHER) **cipher_list,
1447                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1448                 const char *rule_str, CERT *c)
1449         {
1450         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1451         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1452         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1453         const char *rule_p;
1454         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1455         const SSL_CIPHER **ca_list = NULL;
1456
1457         /*
1458          * Return with error if nothing to do.
1459          */
1460         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1461                 return NULL;
1462 #ifndef OPENSSL_NO_EC
1463         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1464                 return NULL;
1465 #endif
1466
1467         /*
1468          * To reduce the work to do we only want to process the compiled
1469          * in algorithms, so we first get the mask of disabled ciphers.
1470          */
1471         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1472
1473         /*
1474          * Now we have to collect the available ciphers from the compiled
1475          * in ciphers. We cannot get more than the number compiled in, so
1476          * it is used for allocation.
1477          */
1478         num_of_ciphers = ssl_method->num_ciphers();
1479 #ifdef KSSL_DEBUG
1480         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1481 #endif    /* KSSL_DEBUG */
1482         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1483         if (co_list == NULL)
1484                 {
1485                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1486                 return(NULL);   /* Failure */
1487                 }
1488
1489         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1490                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1491                                    co_list, &head, &tail);
1492
1493
1494         /* Now arrange all ciphers by preference: */
1495
1496         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1497         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1498         ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1499
1500         /* AES is our preferred symmetric cipher */
1501         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1502
1503         /* Temporarily enable everything else for sorting */
1504         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1505
1506         /* Low priority for MD5 */
1507         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1508
1509         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1510          * (For applications that allow them, they aren't too bad, but we prefer
1511          * authenticated ciphers.) */
1512         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1513
1514         /* Move ciphers without forward secrecy to the end */
1515         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1516         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1517         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1518         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1519         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1520
1521         /* RC4 is sort-of broken -- move the the end */
1522         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1523
1524         /* Now sort by symmetric encryption strength.  The above ordering remains
1525          * in force within each class */
1526         if (!ssl_cipher_strength_sort(&head, &tail))
1527                 {
1528                 OPENSSL_free(co_list);
1529                 return NULL;
1530                 }
1531
1532         /* Now disable everything (maintaining the ordering!) */
1533         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1534
1535
1536         /*
1537          * We also need cipher aliases for selecting based on the rule_str.
1538          * There might be two types of entries in the rule_str: 1) names
1539          * of ciphers themselves 2) aliases for groups of ciphers.
1540          * For 1) we need the available ciphers and for 2) the cipher
1541          * groups of cipher_aliases added together in one list (otherwise
1542          * we would be happy with just the cipher_aliases table).
1543          */
1544         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1545         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1546         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1547         if (ca_list == NULL)
1548                 {
1549                 OPENSSL_free(co_list);
1550                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1551                 return(NULL);   /* Failure */
1552                 }
1553         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1554                                    disabled_mkey, disabled_auth, disabled_enc,
1555                                    disabled_mac, disabled_ssl, head);
1556
1557         /*
1558          * If the rule_string begins with DEFAULT, apply the default rule
1559          * before using the (possibly available) additional rules.
1560          */
1561         ok = 1;
1562         rule_p = rule_str;
1563         if (strncmp(rule_str,"DEFAULT",7) == 0)
1564                 {
1565                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1566                         &head, &tail, ca_list);
1567                 rule_p += 7;
1568                 if (*rule_p == ':')
1569                         rule_p++;
1570                 }
1571
1572         if (ok && (strlen(rule_p) > 0))
1573                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1574
1575         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1576
1577         if (!ok)
1578                 {       /* Rule processing failure */
1579                 OPENSSL_free(co_list);
1580                 return(NULL);
1581                 }
1582         
1583         /*
1584          * Allocate new "cipherstack" for the result, return with error
1585          * if we cannot get one.
1586          */
1587         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1588                 {
1589                 OPENSSL_free(co_list);
1590                 return(NULL);
1591                 }
1592
1593         /*
1594          * The cipher selection for the list is done. The ciphers are added
1595          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1596          */
1597         for (curr = head; curr != NULL; curr = curr->next)
1598                 {
1599 #ifdef OPENSSL_FIPS
1600                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1601 #else
1602                 if (curr->active)
1603 #endif
1604                         {
1605                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1606 #ifdef CIPHER_DEBUG
1607                         printf("<%s>\n",curr->cipher->name);
1608 #endif
1609                         }
1610                 }
1611         OPENSSL_free(co_list);  /* Not needed any longer */
1612
1613         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1614         if (tmp_cipher_list == NULL)
1615                 {
1616                 sk_SSL_CIPHER_free(cipherstack);
1617                 return NULL;
1618                 }
1619         if (*cipher_list != NULL)
1620                 sk_SSL_CIPHER_free(*cipher_list);
1621         *cipher_list = cipherstack;
1622         if (*cipher_list_by_id != NULL)
1623                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1624         *cipher_list_by_id = tmp_cipher_list;
1625         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1626
1627         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1628         return(cipherstack);
1629         }
1630
1631 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1632         {
1633         int is_export,pkl,kl;
1634         const char *ver,*exp_str;
1635         const char *kx,*au,*enc,*mac;
1636         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1637 #ifdef KSSL_DEBUG
1638         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1639 #else
1640         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1641 #endif /* KSSL_DEBUG */
1642
1643         alg_mkey = cipher->algorithm_mkey;
1644         alg_auth = cipher->algorithm_auth;
1645         alg_enc = cipher->algorithm_enc;
1646         alg_mac = cipher->algorithm_mac;
1647         alg_ssl = cipher->algorithm_ssl;
1648
1649         alg2=cipher->algorithm2;
1650
1651         is_export=SSL_C_IS_EXPORT(cipher);
1652         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1653         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1654         exp_str=is_export?" export":"";
1655         
1656         if (alg_ssl & SSL_SSLV2)
1657                 ver="SSLv2";
1658         else if (alg_ssl & SSL_SSLV3)
1659                 ver="SSLv3";
1660         else if (alg_ssl & SSL_TLSV1_2)
1661                 ver="TLSv1.2";
1662         else
1663                 ver="unknown";
1664
1665         switch (alg_mkey)
1666                 {
1667         case SSL_kRSA:
1668                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1669                 break;
1670         case SSL_kDHr:
1671                 kx="DH/RSA";
1672                 break;
1673         case SSL_kDHd:
1674                 kx="DH/DSS";
1675                 break;
1676         case SSL_kKRB5:
1677                 kx="KRB5";
1678                 break;
1679         case SSL_kDHE:
1680                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1681                 break;
1682         case SSL_kECDHr:
1683                 kx="ECDH/RSA";
1684                 break;
1685         case SSL_kECDHe:
1686                 kx="ECDH/ECDSA";
1687                 break;
1688         case SSL_kECDHE:
1689                 kx="ECDH";
1690                 break;
1691         case SSL_kPSK:
1692                 kx="PSK";
1693                 break;
1694         case SSL_kSRP:
1695                 kx="SRP";
1696                 break;
1697         default:
1698                 kx="unknown";
1699                 }
1700
1701         switch (alg_auth)
1702                 {
1703         case SSL_aRSA:
1704                 au="RSA";
1705                 break;
1706         case SSL_aDSS:
1707                 au="DSS";
1708                 break;
1709         case SSL_aDH:
1710                 au="DH";
1711                 break;
1712         case SSL_aKRB5:
1713                 au="KRB5";
1714                 break;
1715         case SSL_aECDH:
1716                 au="ECDH";
1717                 break;
1718         case SSL_aNULL:
1719                 au="None";
1720                 break;
1721         case SSL_aECDSA:
1722                 au="ECDSA";
1723                 break;
1724         case SSL_aPSK:
1725                 au="PSK";
1726                 break;
1727         default:
1728                 au="unknown";
1729                 break;
1730                 }
1731
1732         switch (alg_enc)
1733                 {
1734         case SSL_DES:
1735                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1736                 break;
1737         case SSL_3DES:
1738                 enc="3DES(168)";
1739                 break;
1740         case SSL_RC4:
1741                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1742                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1743                 break;
1744         case SSL_RC2:
1745                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1746                 break;
1747         case SSL_IDEA:
1748                 enc="IDEA(128)";
1749                 break;
1750         case SSL_eNULL:
1751                 enc="None";
1752                 break;
1753         case SSL_AES128:
1754                 enc="AES(128)";
1755                 break;
1756         case SSL_AES256:
1757                 enc="AES(256)";
1758                 break;
1759         case SSL_AES128GCM:
1760                 enc="AESGCM(128)";
1761                 break;
1762         case SSL_AES256GCM:
1763                 enc="AESGCM(256)";
1764                 break;
1765         case SSL_CAMELLIA128:
1766                 enc="Camellia(128)";
1767                 break;
1768         case SSL_CAMELLIA256:
1769                 enc="Camellia(256)";
1770                 break;
1771         case SSL_SEED:
1772                 enc="SEED(128)";
1773                 break;
1774         default:
1775                 enc="unknown";
1776                 break;
1777                 }
1778
1779         switch (alg_mac)
1780                 {
1781         case SSL_MD5:
1782                 mac="MD5";
1783                 break;
1784         case SSL_SHA1:
1785                 mac="SHA1";
1786                 break;
1787         case SSL_SHA256:
1788                 mac="SHA256";
1789                 break;
1790         case SSL_SHA384:
1791                 mac="SHA384";
1792                 break;
1793         case SSL_AEAD:
1794                 mac="AEAD";
1795                 break;
1796         default:
1797                 mac="unknown";
1798                 break;
1799                 }
1800
1801         if (buf == NULL)
1802                 {
1803                 len=128;
1804                 buf=OPENSSL_malloc(len);
1805                 if (buf == NULL) return("OPENSSL_malloc Error");
1806                 }
1807         else if (len < 128)
1808                 return("Buffer too small");
1809
1810 #ifdef KSSL_DEBUG
1811         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1812 #else
1813         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1814 #endif /* KSSL_DEBUG */
1815         return(buf);
1816         }
1817
1818 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1819         {
1820         int i;
1821
1822         if (c == NULL) return("(NONE)");
1823         i=(int)(c->id>>24L);
1824         if (i == 3)
1825                 return("TLSv1/SSLv3");
1826         else if (i == 2)
1827                 return("SSLv2");
1828         else
1829                 return("unknown");
1830         }
1831
1832 /* return the actual cipher being used */
1833 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1834         {
1835         if (c != NULL)
1836                 return(c->name);
1837         return("(NONE)");
1838         }
1839
1840 /* number of bits for symmetric cipher */
1841 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1842         {
1843         int ret=0;
1844
1845         if (c != NULL)
1846                 {
1847                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1848                 ret = c->strength_bits;
1849                 }
1850         return(ret);
1851         }
1852
1853 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1854         {
1855         return c->id;
1856         }
1857
1858 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1859         {
1860         SSL_COMP *ctmp;
1861         int i,nn;
1862
1863         if ((n == 0) || (sk == NULL)) return(NULL);
1864         nn=sk_SSL_COMP_num(sk);
1865         for (i=0; i<nn; i++)
1866                 {
1867                 ctmp=sk_SSL_COMP_value(sk,i);
1868                 if (ctmp->id == n)
1869                         return(ctmp);
1870                 }
1871         return(NULL);
1872         }
1873
1874 #ifdef OPENSSL_NO_COMP
1875 void *SSL_COMP_get_compression_methods(void)
1876         {
1877         return NULL;
1878         }
1879 int SSL_COMP_add_compression_method(int id, void *cm)
1880         {
1881         return 1;
1882         }
1883
1884 const char *SSL_COMP_get_name(const void *comp)
1885         {
1886         return NULL;
1887         }
1888 #else
1889 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1890         {
1891         load_builtin_compressions();
1892         return(ssl_comp_methods);
1893         }
1894
1895 void SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1896         {
1897         ssl_comp_methods = meths;
1898         }
1899
1900 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1901         {
1902         SSL_COMP *comp;
1903
1904         if (cm == NULL || cm->type == NID_undef)
1905                 return 1;
1906
1907         /* According to draft-ietf-tls-compression-04.txt, the
1908            compression number ranges should be the following:
1909
1910            0 to 63:    methods defined by the IETF
1911            64 to 192:  external party methods assigned by IANA
1912            193 to 255: reserved for private use */
1913         if (id < 193 || id > 255)
1914                 {
1915                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1916                 return 0;
1917                 }
1918
1919         MemCheck_off();
1920         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1921         comp->id=id;
1922         comp->method=cm;
1923         load_builtin_compressions();
1924         if (ssl_comp_methods
1925                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1926                 {
1927                 OPENSSL_free(comp);
1928                 MemCheck_on();
1929                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1930                 return(1);
1931                 }
1932         else if ((ssl_comp_methods == NULL)
1933                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1934                 {
1935                 OPENSSL_free(comp);
1936                 MemCheck_on();
1937                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1938                 return(1);
1939                 }
1940         else
1941                 {
1942                 MemCheck_on();
1943                 return(0);
1944                 }
1945         }
1946
1947 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1948         {
1949         if (comp)
1950                 return comp->name;
1951         return NULL;
1952         }
1953 #endif
1954 /* For a cipher return the index corresponding to the certificate type */
1955 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1956         {
1957         unsigned long alg_k, alg_a;
1958
1959         alg_k = c->algorithm_mkey;
1960         alg_a = c->algorithm_auth;
1961
1962         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1963                 {
1964                 /* we don't need to look at SSL_kECDHE
1965                  * since no certificate is needed for
1966                  * anon ECDH and for authenticated
1967                  * ECDHE, the check for the auth
1968                  * algorithm will set i correctly
1969                  * NOTE: For ECDH-RSA, we need an ECC
1970                  * not an RSA cert but for ECDHE-RSA
1971                  * we need an RSA cert. Placing the
1972                  * checks for SSL_kECDH before RSA
1973                  * checks ensures the correct cert is chosen.
1974                  */
1975                 return SSL_PKEY_ECC;
1976                 }
1977         else if (alg_a & SSL_aECDSA)
1978                 return SSL_PKEY_ECC;
1979         else if (alg_k & SSL_kDHr)
1980                 return SSL_PKEY_DH_RSA;
1981         else if (alg_k & SSL_kDHd)
1982                 return SSL_PKEY_DH_DSA;
1983         else if (alg_a & SSL_aDSS)
1984                 return SSL_PKEY_DSA_SIGN;
1985         else if (alg_a & SSL_aRSA)
1986                 return SSL_PKEY_RSA_ENC;
1987         else if (alg_a & SSL_aKRB5)
1988                 /* VRS something else here? */
1989                 return -1;
1990         else if (alg_a & SSL_aGOST94) 
1991                 return SSL_PKEY_GOST94;
1992         else if (alg_a & SSL_aGOST01)
1993                 return SSL_PKEY_GOST01;
1994         return -1;
1995         }
1996
1997 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
1998         {
1999         const SSL_CIPHER *c;
2000         c = ssl->method->get_cipher_by_char(ptr);
2001         if (c == NULL || c->valid == 0)
2002                 return NULL;
2003         return c;
2004         }
2005
2006 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2007         {
2008         return ssl->method->get_cipher_by_char(ptr);
2009         }