35ed940c3a68a232e9cfd3f330f2d8d1aeb08855
[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_kEDH|SSL_kEECDH,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. kEDH 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_kEDH,  0,0,0,0,0,0,0,0},
245         {0,SSL_TXT_DH,0,      SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
246
247         {0,SSL_TXT_kKRB5,0,   SSL_kKRB5, 0,0,0,0,0,0,0,0},
248
249         {0,SSL_TXT_kECDHr,0,  SSL_kECDHr,0,0,0,0,0,0,0,0},
250         {0,SSL_TXT_kECDHe,0,  SSL_kECDHe,0,0,0,0,0,0,0,0},
251         {0,SSL_TXT_kECDH,0,   SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
252         {0,SSL_TXT_kEECDH,0,  SSL_kEECDH,0,0,0,0,0,0,0,0},
253         {0,SSL_TXT_ECDH,0,    SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
254
255         {0,SSL_TXT_kPSK,0,    SSL_kPSK,  0,0,0,0,0,0,0,0},
256         {0,SSL_TXT_kSRP,0,    SSL_kSRP,  0,0,0,0,0,0,0,0},
257         {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
258
259         /* server authentication aliases */
260         {0,SSL_TXT_aRSA,0,    0,SSL_aRSA,  0,0,0,0,0,0,0},
261         {0,SSL_TXT_aDSS,0,    0,SSL_aDSS,  0,0,0,0,0,0,0},
262         {0,SSL_TXT_DSS,0,     0,SSL_aDSS,   0,0,0,0,0,0,0},
263         {0,SSL_TXT_aKRB5,0,   0,SSL_aKRB5, 0,0,0,0,0,0,0},
264         {0,SSL_TXT_aNULL,0,   0,SSL_aNULL, 0,0,0,0,0,0,0},
265         {0,SSL_TXT_aDH,0,     0,SSL_aDH,   0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
266         {0,SSL_TXT_aECDH,0,   0,SSL_aECDH, 0,0,0,0,0,0,0},
267         {0,SSL_TXT_aECDSA,0,  0,SSL_aECDSA,0,0,0,0,0,0,0},
268         {0,SSL_TXT_ECDSA,0,   0,SSL_aECDSA, 0,0,0,0,0,0,0},
269         {0,SSL_TXT_aPSK,0,    0,SSL_aPSK,  0,0,0,0,0,0,0},
270         {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
271         {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
272         {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
273
274         /* aliases combining key exchange and server authentication */
275         {0,SSL_TXT_EDH,0,     SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
276         {0,SSL_TXT_EECDH,0,   SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
277         {0,SSL_TXT_NULL,0,    0,0,SSL_eNULL, 0,0,0,0,0,0},
278         {0,SSL_TXT_KRB5,0,    SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
279         {0,SSL_TXT_RSA,0,     SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
280         {0,SSL_TXT_ADH,0,     SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
281         {0,SSL_TXT_AECDH,0,   SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
282         {0,SSL_TXT_PSK,0,     SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
283         {0,SSL_TXT_SRP,0,     SSL_kSRP,0,0,0,0,0,0,0,0},
284
285
286         /* symmetric encryption aliases */
287         {0,SSL_TXT_DES,0,     0,0,SSL_DES,   0,0,0,0,0,0},
288         {0,SSL_TXT_3DES,0,    0,0,SSL_3DES,  0,0,0,0,0,0},
289         {0,SSL_TXT_RC4,0,     0,0,SSL_RC4,   0,0,0,0,0,0},
290         {0,SSL_TXT_RC2,0,     0,0,SSL_RC2,   0,0,0,0,0,0},
291         {0,SSL_TXT_IDEA,0,    0,0,SSL_IDEA,  0,0,0,0,0,0},
292         {0,SSL_TXT_SEED,0,    0,0,SSL_SEED,  0,0,0,0,0,0},
293         {0,SSL_TXT_eNULL,0,   0,0,SSL_eNULL, 0,0,0,0,0,0},
294         {0,SSL_TXT_AES128,0,  0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
295         {0,SSL_TXT_AES256,0,  0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
296         {0,SSL_TXT_AES,0,     0,0,SSL_AES,0,0,0,0,0,0},
297         {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
298         {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
299         {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
300         {0,SSL_TXT_CAMELLIA   ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
301
302         /* MAC aliases */       
303         {0,SSL_TXT_MD5,0,     0,0,0,SSL_MD5,   0,0,0,0,0},
304         {0,SSL_TXT_SHA1,0,    0,0,0,SSL_SHA1,  0,0,0,0,0},
305         {0,SSL_TXT_SHA,0,     0,0,0,SSL_SHA1,  0,0,0,0,0},
306         {0,SSL_TXT_GOST94,0,     0,0,0,SSL_GOST94,  0,0,0,0,0},
307         {0,SSL_TXT_GOST89MAC,0,     0,0,0,SSL_GOST89MAC,  0,0,0,0,0},
308         {0,SSL_TXT_SHA256,0,    0,0,0,SSL_SHA256,  0,0,0,0,0},
309         {0,SSL_TXT_SHA384,0,    0,0,0,SSL_SHA384,  0,0,0,0,0},
310
311         /* protocol version aliases */
312         {0,SSL_TXT_SSLV2,0,   0,0,0,0,SSL_SSLV2, 0,0,0,0},
313         {0,SSL_TXT_SSLV3,0,   0,0,0,0,SSL_SSLV3, 0,0,0,0},
314         {0,SSL_TXT_TLSV1,0,   0,0,0,0,SSL_TLSV1, 0,0,0,0},
315
316         /* export flag */
317         {0,SSL_TXT_EXP,0,     0,0,0,0,0,SSL_EXPORT,0,0,0},
318         {0,SSL_TXT_EXPORT,0,  0,0,0,0,0,SSL_EXPORT,0,0,0},
319
320         /* strength classes */
321         {0,SSL_TXT_EXP40,0,   0,0,0,0,0,SSL_EXP40, 0,0,0},
322         {0,SSL_TXT_EXP56,0,   0,0,0,0,0,SSL_EXP56, 0,0,0},
323         {0,SSL_TXT_LOW,0,     0,0,0,0,0,SSL_LOW,   0,0,0},
324         {0,SSL_TXT_MEDIUM,0,  0,0,0,0,0,SSL_MEDIUM,0,0,0},
325         {0,SSL_TXT_HIGH,0,    0,0,0,0,0,SSL_HIGH,  0,0,0},
326         /* FIPS 140-2 approved ciphersuite */
327         {0,SSL_TXT_FIPS,0,    0,0,~SSL_eNULL,0,0,SSL_FIPS,  0,0,0},
328         };
329 /* Search for public key algorithm with given name and 
330  * return its pkey_id if it is available. Otherwise return 0
331  */
332 #ifdef OPENSSL_NO_ENGINE
333
334 static int get_optional_pkey_id(const char *pkey_name)
335         {
336         const EVP_PKEY_ASN1_METHOD *ameth;
337         int pkey_id=0;
338         ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
339         if (ameth) 
340                 {
341                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
342                 }               
343         return pkey_id;
344         }
345
346 #else
347
348 static int get_optional_pkey_id(const char *pkey_name)
349         {
350         const EVP_PKEY_ASN1_METHOD *ameth;
351         ENGINE *tmpeng = NULL;
352         int pkey_id=0;
353         ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
354         if (ameth)
355                 {
356                 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
357                 }
358         if (tmpeng) ENGINE_finish(tmpeng);
359         return pkey_id;
360         }
361
362 #endif
363
364 void ssl_load_ciphers(void)
365         {
366         ssl_cipher_methods[SSL_ENC_DES_IDX]= 
367                 EVP_get_cipherbyname(SN_des_cbc);
368         ssl_cipher_methods[SSL_ENC_3DES_IDX]=
369                 EVP_get_cipherbyname(SN_des_ede3_cbc);
370         ssl_cipher_methods[SSL_ENC_RC4_IDX]=
371                 EVP_get_cipherbyname(SN_rc4);
372         ssl_cipher_methods[SSL_ENC_RC2_IDX]= 
373                 EVP_get_cipherbyname(SN_rc2_cbc);
374 #ifndef OPENSSL_NO_IDEA
375         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= 
376                 EVP_get_cipherbyname(SN_idea_cbc);
377 #else
378         ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
379 #endif
380         ssl_cipher_methods[SSL_ENC_AES128_IDX]=
381           EVP_get_cipherbyname(SN_aes_128_cbc);
382         ssl_cipher_methods[SSL_ENC_AES256_IDX]=
383           EVP_get_cipherbyname(SN_aes_256_cbc);
384         ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
385           EVP_get_cipherbyname(SN_camellia_128_cbc);
386         ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
387           EVP_get_cipherbyname(SN_camellia_256_cbc);
388         ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
389           EVP_get_cipherbyname(SN_gost89_cnt);
390         ssl_cipher_methods[SSL_ENC_SEED_IDX]=
391           EVP_get_cipherbyname(SN_seed_cbc);
392
393         ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
394           EVP_get_cipherbyname(SN_aes_128_gcm);
395         ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
396           EVP_get_cipherbyname(SN_aes_256_gcm);
397
398         ssl_digest_methods[SSL_MD_MD5_IDX]=
399                 EVP_get_digestbyname(SN_md5);
400         ssl_mac_secret_size[SSL_MD_MD5_IDX]=
401                 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
402         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
403         ssl_digest_methods[SSL_MD_SHA1_IDX]=
404                 EVP_get_digestbyname(SN_sha1);
405         ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
406                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
407         OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
408         ssl_digest_methods[SSL_MD_GOST94_IDX]=
409                 EVP_get_digestbyname(SN_id_GostR3411_94);
410         if (ssl_digest_methods[SSL_MD_GOST94_IDX])
411                 {       
412                 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
413                         EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
414                 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
415                 }
416         ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
417                 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
418                 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
419                 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
420                         ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
421                 }               
422
423         ssl_digest_methods[SSL_MD_SHA256_IDX]=
424                 EVP_get_digestbyname(SN_sha256);
425         ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
426                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
427         ssl_digest_methods[SSL_MD_SHA384_IDX]=
428                 EVP_get_digestbyname(SN_sha384);
429         ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
430                 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
431         }
432 #ifndef OPENSSL_NO_COMP
433
434 static int sk_comp_cmp(const SSL_COMP * const *a,
435                         const SSL_COMP * const *b)
436         {
437         return((*a)->id-(*b)->id);
438         }
439
440 static void load_builtin_compressions(void)
441         {
442         int got_write_lock = 0;
443
444         CRYPTO_r_lock(CRYPTO_LOCK_SSL);
445         if (ssl_comp_methods == NULL)
446                 {
447                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
448                 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
449                 got_write_lock = 1;
450                 
451                 if (ssl_comp_methods == NULL)
452                         {
453                         SSL_COMP *comp = NULL;
454
455                         MemCheck_off();
456                         ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
457                         if (ssl_comp_methods != NULL)
458                                 {
459                                 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
460                                 if (comp != NULL)
461                                         {
462                                         comp->method=COMP_zlib();
463                                         if (comp->method
464                                                 && comp->method->type == NID_undef)
465                                                 OPENSSL_free(comp);
466                                         else
467                                                 {
468                                                 comp->id=SSL_COMP_ZLIB_IDX;
469                                                 comp->name=comp->method->name;
470                                                 sk_SSL_COMP_push(ssl_comp_methods,comp);
471                                                 }
472                                         }
473                                         sk_SSL_COMP_sort(ssl_comp_methods);
474                                 }
475                         MemCheck_on();
476                         }
477                 }
478         
479         if (got_write_lock)
480                 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
481         else
482                 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
483         }
484 #endif
485
486 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
487              const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp)
488         {
489         int i;
490         const SSL_CIPHER *c;
491
492         c=s->cipher;
493         if (c == NULL) return(0);
494         if (comp != NULL)
495                 {
496                 SSL_COMP ctmp;
497 #ifndef OPENSSL_NO_COMP
498                 load_builtin_compressions();
499 #endif
500
501                 *comp=NULL;
502                 ctmp.id=s->compress_meth;
503                 if (ssl_comp_methods != NULL)
504                         {
505                         i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
506                         if (i >= 0)
507                                 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
508                         else
509                                 *comp=NULL;
510                         }
511                 }
512
513         if ((enc == NULL) || (md == NULL)) return(0);
514
515         switch (c->algorithm_enc)
516                 {
517         case SSL_DES:
518                 i=SSL_ENC_DES_IDX;
519                 break;
520         case SSL_3DES:
521                 i=SSL_ENC_3DES_IDX;
522                 break;
523         case SSL_RC4:
524                 i=SSL_ENC_RC4_IDX;
525                 break;
526         case SSL_RC2:
527                 i=SSL_ENC_RC2_IDX;
528                 break;
529         case SSL_IDEA:
530                 i=SSL_ENC_IDEA_IDX;
531                 break;
532         case SSL_eNULL:
533                 i=SSL_ENC_NULL_IDX;
534                 break;
535         case SSL_AES128:
536                 i=SSL_ENC_AES128_IDX;
537                 break;
538         case SSL_AES256:
539                 i=SSL_ENC_AES256_IDX;
540                 break;
541         case SSL_CAMELLIA128:
542                 i=SSL_ENC_CAMELLIA128_IDX;
543                 break;
544         case SSL_CAMELLIA256:
545                 i=SSL_ENC_CAMELLIA256_IDX;
546                 break;
547         case SSL_eGOST2814789CNT:
548                 i=SSL_ENC_GOST89_IDX;
549                 break;
550         case SSL_SEED:
551                 i=SSL_ENC_SEED_IDX;
552                 break;
553         case SSL_AES128GCM:
554                 i=SSL_ENC_AES128GCM_IDX;
555                 break;
556         case SSL_AES256GCM:
557                 i=SSL_ENC_AES256GCM_IDX;
558                 break;
559         default:
560                 i= -1;
561                 break;
562                 }
563
564         if ((i < 0) || (i > SSL_ENC_NUM_IDX))
565                 *enc=NULL;
566         else
567                 {
568                 if (i == SSL_ENC_NULL_IDX)
569                         *enc=EVP_enc_null();
570                 else
571                         *enc=ssl_cipher_methods[i];
572                 }
573
574         switch (c->algorithm_mac)
575                 {
576         case SSL_MD5:
577                 i=SSL_MD_MD5_IDX;
578                 break;
579         case SSL_SHA1:
580                 i=SSL_MD_SHA1_IDX;
581                 break;
582         case SSL_SHA256:
583                 i=SSL_MD_SHA256_IDX;
584                 break;
585         case SSL_SHA384:
586                 i=SSL_MD_SHA384_IDX;
587                 break;
588         case SSL_GOST94:
589                 i = SSL_MD_GOST94_IDX;
590                 break;
591         case SSL_GOST89MAC:
592                 i = SSL_MD_GOST89MAC_IDX;
593                 break;
594         default:
595                 i= -1;
596                 break;
597                 }
598         if ((i < 0) || (i > SSL_MD_NUM_IDX))
599         {
600                 *md=NULL; 
601                 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
602                 if (mac_secret_size!=NULL) *mac_secret_size = 0;
603                 if (c->algorithm_mac == SSL_AEAD)
604                         mac_pkey_type = NULL;
605         }
606         else
607         {
608                 *md=ssl_digest_methods[i];
609                 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
610                 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
611         }
612
613         if ((*enc != NULL) &&
614             (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
615             (!mac_pkey_type||*mac_pkey_type != NID_undef))
616                 {
617                 const EVP_CIPHER *evp;
618
619                 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
620                     s->ssl_version < TLS1_VERSION)
621                         return 1;
622
623 #ifdef OPENSSL_FIPS
624                 if (FIPS_mode())
625                         return 1;
626 #endif
627
628                 if      (c->algorithm_enc == SSL_RC4 &&
629                          c->algorithm_mac == SSL_MD5 &&
630                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
631                         *enc = evp, *md = NULL;
632                 else if (c->algorithm_enc == SSL_AES128 &&
633                          c->algorithm_mac == SSL_SHA1 &&
634                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
635                         *enc = evp, *md = NULL;
636                 else if (c->algorithm_enc == SSL_AES256 &&
637                          c->algorithm_mac == SSL_SHA1 &&
638                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
639                         *enc = evp, *md = NULL;
640                 return(1);
641                 }
642         else
643                 return(0);
644         }
645
646 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
647 {
648         if (idx <0||idx>=SSL_MD_NUM_IDX) 
649                 {
650                 return 0;
651                 }
652         *mask = ssl_handshake_digest_flag[idx];
653         if (*mask)
654                 *md = ssl_digest_methods[idx];
655         else
656                 *md = NULL;
657         return 1;
658 }
659
660 #define ITEM_SEP(a) \
661         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
662
663 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
664              CIPHER_ORDER **tail)
665         {
666         if (curr == *tail) return;
667         if (curr == *head)
668                 *head=curr->next;
669         if (curr->prev != NULL)
670                 curr->prev->next=curr->next;
671         if (curr->next != NULL)
672                 curr->next->prev=curr->prev;
673         (*tail)->next=curr;
674         curr->prev= *tail;
675         curr->next=NULL;
676         *tail=curr;
677         }
678
679 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
680              CIPHER_ORDER **tail)
681         {
682         if (curr == *head) return;
683         if (curr == *tail)
684                 *tail=curr->prev;
685         if (curr->next != NULL)
686                 curr->next->prev=curr->prev;
687         if (curr->prev != NULL)
688                 curr->prev->next=curr->next;
689         (*head)->prev=curr;
690         curr->next= *head;
691         curr->prev=NULL;
692         *head=curr;
693         }
694
695 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
696         {
697         *mkey = 0;
698         *auth = 0;
699         *enc = 0;
700         *mac = 0;
701         *ssl = 0;
702
703 #ifdef OPENSSL_NO_RSA
704         *mkey |= SSL_kRSA;
705         *auth |= SSL_aRSA;
706 #endif
707 #ifdef OPENSSL_NO_DSA
708         *auth |= SSL_aDSS;
709 #endif
710 #ifdef OPENSSL_NO_DH
711         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
712         *auth |= SSL_aDH;
713 #endif
714 #ifdef OPENSSL_NO_KRB5
715         *mkey |= SSL_kKRB5;
716         *auth |= SSL_aKRB5;
717 #endif
718 #ifdef OPENSSL_NO_ECDSA
719         *auth |= SSL_aECDSA;
720 #endif
721 #ifdef OPENSSL_NO_ECDH
722         *mkey |= SSL_kECDHe|SSL_kECDHr;
723         *auth |= SSL_aECDH;
724 #endif
725 #ifdef OPENSSL_NO_PSK
726         *mkey |= SSL_kPSK;
727         *auth |= SSL_aPSK;
728 #endif
729 #ifdef OPENSSL_NO_SRP
730         *mkey |= SSL_kSRP;
731 #endif
732         /* Check for presence of GOST 34.10 algorithms, and if they
733          * do not present, disable  appropriate auth and key exchange */
734         if (!get_optional_pkey_id("gost94")) {
735                 *auth |= SSL_aGOST94;
736         }
737         if (!get_optional_pkey_id("gost2001")) {
738                 *auth |= SSL_aGOST01;
739         }
740         /* Disable GOST key exchange if no GOST signature algs are available * */
741         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
742                 *mkey |= SSL_kGOST;
743         }       
744 #ifdef SSL_FORBID_ENULL
745         *enc |= SSL_eNULL;
746 #endif
747                 
748
749
750         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
751         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
752         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
753         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
754         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
755         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
756         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
757         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
758         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
759         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
760         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
761         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
762         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
763
764         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
765         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
766         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
767         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
768         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
769         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
770
771         }
772
773 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
774                 int num_of_ciphers,
775                 unsigned long disabled_mkey, unsigned long disabled_auth,
776                 unsigned long disabled_enc, unsigned long disabled_mac,
777                 unsigned long disabled_ssl,
778                 CIPHER_ORDER *co_list,
779                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
780         {
781         int i, co_list_num;
782         const SSL_CIPHER *c;
783
784         /*
785          * We have num_of_ciphers descriptions compiled in, depending on the
786          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
787          * These will later be sorted in a linked list with at most num
788          * entries.
789          */
790
791         /* Get the initial list of ciphers */
792         co_list_num = 0;        /* actual count of ciphers */
793         for (i = 0; i < num_of_ciphers; i++)
794                 {
795                 c = ssl_method->get_cipher(i);
796                 /* drop those that use any of that is not available */
797                 if ((c != NULL) && c->valid &&
798 #ifdef OPENSSL_FIPS
799                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
800 #endif
801                     !(c->algorithm_mkey & disabled_mkey) &&
802                     !(c->algorithm_auth & disabled_auth) &&
803                     !(c->algorithm_enc & disabled_enc) &&
804                     !(c->algorithm_mac & disabled_mac) &&
805                     !(c->algorithm_ssl & disabled_ssl))
806                         {
807                         co_list[co_list_num].cipher = c;
808                         co_list[co_list_num].next = NULL;
809                         co_list[co_list_num].prev = NULL;
810                         co_list[co_list_num].active = 0;
811                         co_list_num++;
812 #ifdef KSSL_DEBUG
813                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
814 #endif  /* KSSL_DEBUG */
815                         /*
816                         if (!sk_push(ca_list,(char *)c)) goto err;
817                         */
818                         }
819                 }
820
821         /*
822          * Prepare linked list from list entries
823          */     
824         if (co_list_num > 0)
825                 {
826                 co_list[0].prev = NULL;
827
828                 if (co_list_num > 1)
829                         {
830                         co_list[0].next = &co_list[1];
831                         
832                         for (i = 1; i < co_list_num - 1; i++)
833                                 {
834                                 co_list[i].prev = &co_list[i - 1];
835                                 co_list[i].next = &co_list[i + 1];
836                                 }
837
838                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
839                         }
840                 
841                 co_list[co_list_num - 1].next = NULL;
842
843                 *head_p = &co_list[0];
844                 *tail_p = &co_list[co_list_num - 1];
845                 }
846         }
847
848 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
849                         int num_of_group_aliases,
850                         unsigned long disabled_mkey, unsigned long disabled_auth,
851                         unsigned long disabled_enc, unsigned long disabled_mac,
852                         unsigned long disabled_ssl,
853                         CIPHER_ORDER *head)
854         {
855         CIPHER_ORDER *ciph_curr;
856         const SSL_CIPHER **ca_curr;
857         int i;
858         unsigned long mask_mkey = ~disabled_mkey;
859         unsigned long mask_auth = ~disabled_auth;
860         unsigned long mask_enc = ~disabled_enc;
861         unsigned long mask_mac = ~disabled_mac;
862         unsigned long mask_ssl = ~disabled_ssl;
863
864         /*
865          * First, add the real ciphers as already collected
866          */
867         ciph_curr = head;
868         ca_curr = ca_list;
869         while (ciph_curr != NULL)
870                 {
871                 *ca_curr = ciph_curr->cipher;
872                 ca_curr++;
873                 ciph_curr = ciph_curr->next;
874                 }
875
876         /*
877          * Now we add the available ones from the cipher_aliases[] table.
878          * They represent either one or more algorithms, some of which
879          * in any affected category must be supported (set in enabled_mask),
880          * or represent a cipher strength value (will be added in any case because algorithms=0).
881          */
882         for (i = 0; i < num_of_group_aliases; i++)
883                 {
884                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
885                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
886                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
887                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
888                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
889
890                 if (algorithm_mkey)
891                         if ((algorithm_mkey & mask_mkey) == 0)
892                                 continue;
893         
894                 if (algorithm_auth)
895                         if ((algorithm_auth & mask_auth) == 0)
896                                 continue;
897                 
898                 if (algorithm_enc)
899                         if ((algorithm_enc & mask_enc) == 0)
900                                 continue;
901                 
902                 if (algorithm_mac)
903                         if ((algorithm_mac & mask_mac) == 0)
904                                 continue;
905                 
906                 if (algorithm_ssl)
907                         if ((algorithm_ssl & mask_ssl) == 0)
908                                 continue;
909                 
910                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
911                 ca_curr++;
912                 }
913
914         *ca_curr = NULL;        /* end of list */
915         }
916
917 static void ssl_cipher_apply_rule(unsigned long cipher_id,
918                 unsigned long alg_mkey, unsigned long alg_auth,
919                 unsigned long alg_enc, unsigned long alg_mac,
920                 unsigned long alg_ssl,
921                 unsigned long algo_strength,
922                 int rule, int strength_bits,
923                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
924         {
925         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
926         const SSL_CIPHER *cp;
927         int reverse = 0;
928
929 #ifdef CIPHER_DEBUG
930         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
931                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
932 #endif
933
934         if (rule == CIPHER_DEL)
935                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
936
937         head = *head_p;
938         tail = *tail_p;
939
940         if (reverse)
941                 {
942                 curr = tail;
943                 last = head;
944                 }
945         else
946                 {
947                 curr = head;
948                 last = tail;
949                 }
950
951         curr2 = curr;
952         for (;;)
953                 {
954                 if ((curr == NULL) || (curr == last)) break;
955                 curr = curr2;
956                 curr2 = reverse ? curr->prev : curr->next;
957
958                 cp = curr->cipher;
959
960                 /*
961                  * Selection criteria is either the value of strength_bits
962                  * or the algorithms used.
963                  */
964                 if (strength_bits >= 0)
965                         {
966                         if (strength_bits != cp->strength_bits)
967                                 continue;
968                         }
969                 else
970                         {
971 #ifdef CIPHER_DEBUG
972                         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);
973 #endif
974
975                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
976                                 continue;
977                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
978                                 continue;
979                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
980                                 continue;
981                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
982                                 continue;
983                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
984                                 continue;
985                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
986                                 continue;
987                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
988                                 continue;
989                         }
990
991 #ifdef CIPHER_DEBUG
992                 printf("Action = %d\n", rule);
993 #endif
994
995                 /* add the cipher if it has not been added yet. */
996                 if (rule == CIPHER_ADD)
997                         {
998                         /* reverse == 0 */
999                         if (!curr->active)
1000                                 {
1001                                 ll_append_tail(&head, curr, &tail);
1002                                 curr->active = 1;
1003                                 }
1004                         }
1005                 /* Move the added cipher to this location */
1006                 else if (rule == CIPHER_ORD)
1007                         {
1008                         /* reverse == 0 */
1009                         if (curr->active)
1010                                 {
1011                                 ll_append_tail(&head, curr, &tail);
1012                                 }
1013                         }
1014                 else if (rule == CIPHER_DEL)
1015                         {
1016                         /* reverse == 1 */
1017                         if (curr->active)
1018                                 {
1019                                 /* most recently deleted ciphersuites get best positions
1020                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1021                                  * works in reverse to maintain the order) */
1022                                 ll_append_head(&head, curr, &tail);
1023                                 curr->active = 0;
1024                                 }
1025                         }
1026                 else if (rule == CIPHER_KILL)
1027                         {
1028                         /* reverse == 0 */
1029                         if (head == curr)
1030                                 head = curr->next;
1031                         else
1032                                 curr->prev->next = curr->next;
1033                         if (tail == curr)
1034                                 tail = curr->prev;
1035                         curr->active = 0;
1036                         if (curr->next != NULL)
1037                                 curr->next->prev = curr->prev;
1038                         if (curr->prev != NULL)
1039                                 curr->prev->next = curr->next;
1040                         curr->next = NULL;
1041                         curr->prev = NULL;
1042                         }
1043                 }
1044
1045         *head_p = head;
1046         *tail_p = tail;
1047         }
1048
1049 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1050                                     CIPHER_ORDER **tail_p)
1051         {
1052         int max_strength_bits, i, *number_uses;
1053         CIPHER_ORDER *curr;
1054
1055         /*
1056          * This routine sorts the ciphers with descending strength. The sorting
1057          * must keep the pre-sorted sequence, so we apply the normal sorting
1058          * routine as '+' movement to the end of the list.
1059          */
1060         max_strength_bits = 0;
1061         curr = *head_p;
1062         while (curr != NULL)
1063                 {
1064                 if (curr->active &&
1065                     (curr->cipher->strength_bits > max_strength_bits))
1066                     max_strength_bits = curr->cipher->strength_bits;
1067                 curr = curr->next;
1068                 }
1069
1070         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1071         if (!number_uses)
1072                 {
1073                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1074                 return(0);
1075                 }
1076         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1077
1078         /*
1079          * Now find the strength_bits values actually used
1080          */
1081         curr = *head_p;
1082         while (curr != NULL)
1083                 {
1084                 if (curr->active)
1085                         number_uses[curr->cipher->strength_bits]++;
1086                 curr = curr->next;
1087                 }
1088         /*
1089          * Go through the list of used strength_bits values in descending
1090          * order.
1091          */
1092         for (i = max_strength_bits; i >= 0; i--)
1093                 if (number_uses[i] > 0)
1094                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1095
1096         OPENSSL_free(number_uses);
1097         return(1);
1098         }
1099
1100 static int ssl_cipher_process_rulestr(const char *rule_str,
1101                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1102                 const SSL_CIPHER **ca_list)
1103         {
1104         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1105         const char *l, *buf;
1106         int j, multi, found, rule, retval, ok, buflen;
1107         unsigned long cipher_id = 0;
1108         char ch;
1109
1110         retval = 1;
1111         l = rule_str;
1112         for (;;)
1113                 {
1114                 ch = *l;
1115
1116                 if (ch == '\0')
1117                         break;          /* done */
1118                 if (ch == '-')
1119                         { rule = CIPHER_DEL; l++; }
1120                 else if (ch == '+')
1121                         { rule = CIPHER_ORD; l++; }
1122                 else if (ch == '!')
1123                         { rule = CIPHER_KILL; l++; }
1124                 else if (ch == '@')
1125                         { rule = CIPHER_SPECIAL; l++; }
1126                 else
1127                         { rule = CIPHER_ADD; }
1128
1129                 if (ITEM_SEP(ch))
1130                         {
1131                         l++;
1132                         continue;
1133                         }
1134
1135                 alg_mkey = 0;
1136                 alg_auth = 0;
1137                 alg_enc = 0;
1138                 alg_mac = 0;
1139                 alg_ssl = 0;
1140                 algo_strength = 0;
1141
1142                 for (;;)
1143                         {
1144                         ch = *l;
1145                         buf = l;
1146                         buflen = 0;
1147 #ifndef CHARSET_EBCDIC
1148                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1149                                 ((ch >= '0') && (ch <= '9')) ||
1150                                 ((ch >= 'a') && (ch <= 'z')) ||
1151                                  (ch == '-'))
1152 #else
1153                         while ( isalnum(ch) || (ch == '-'))
1154 #endif
1155                                  {
1156                                  ch = *(++l);
1157                                  buflen++;
1158                                  }
1159
1160                         if (buflen == 0)
1161                                 {
1162                                 /*
1163                                  * We hit something we cannot deal with,
1164                                  * it is no command or separator nor
1165                                  * alphanumeric, so we call this an error.
1166                                  */
1167                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1168                                        SSL_R_INVALID_COMMAND);
1169                                 retval = found = 0;
1170                                 l++;
1171                                 break;
1172                                 }
1173
1174                         if (rule == CIPHER_SPECIAL)
1175                                 {
1176                                 found = 0; /* unused -- avoid compiler warning */
1177                                 break;  /* special treatment */
1178                                 }
1179
1180                         /* check for multi-part specification */
1181                         if (ch == '+')
1182                                 {
1183                                 multi=1;
1184                                 l++;
1185                                 }
1186                         else
1187                                 multi=0;
1188
1189                         /*
1190                          * Now search for the cipher alias in the ca_list. Be careful
1191                          * with the strncmp, because the "buflen" limitation
1192                          * will make the rule "ADH:SOME" and the cipher
1193                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1194                          * So additionally check whether the cipher name found
1195                          * has the correct length. We can save a strlen() call:
1196                          * just checking for the '\0' at the right place is
1197                          * sufficient, we have to strncmp() anyway. (We cannot
1198                          * use strcmp(), because buf is not '\0' terminated.)
1199                          */
1200                         j = found = 0;
1201                         cipher_id = 0;
1202                         while (ca_list[j])
1203                                 {
1204                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1205                                     (ca_list[j]->name[buflen] == '\0'))
1206                                         {
1207                                         found = 1;
1208                                         break;
1209                                         }
1210                                 else
1211                                         j++;
1212                                 }
1213
1214                         if (!found)
1215                                 break;  /* ignore this entry */
1216
1217                         if (ca_list[j]->algorithm_mkey)
1218                                 {
1219                                 if (alg_mkey)
1220                                         {
1221                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1222                                         if (!alg_mkey) { found = 0; break; }
1223                                         }
1224                                 else
1225                                         alg_mkey = ca_list[j]->algorithm_mkey;
1226                                 }
1227
1228                         if (ca_list[j]->algorithm_auth)
1229                                 {
1230                                 if (alg_auth)
1231                                         {
1232                                         alg_auth &= ca_list[j]->algorithm_auth;
1233                                         if (!alg_auth) { found = 0; break; }
1234                                         }
1235                                 else
1236                                         alg_auth = ca_list[j]->algorithm_auth;
1237                                 }
1238                         
1239                         if (ca_list[j]->algorithm_enc)
1240                                 {
1241                                 if (alg_enc)
1242                                         {
1243                                         alg_enc &= ca_list[j]->algorithm_enc;
1244                                         if (!alg_enc) { found = 0; break; }
1245                                         }
1246                                 else
1247                                         alg_enc = ca_list[j]->algorithm_enc;
1248                                 }
1249                                                 
1250                         if (ca_list[j]->algorithm_mac)
1251                                 {
1252                                 if (alg_mac)
1253                                         {
1254                                         alg_mac &= ca_list[j]->algorithm_mac;
1255                                         if (!alg_mac) { found = 0; break; }
1256                                         }
1257                                 else
1258                                         alg_mac = ca_list[j]->algorithm_mac;
1259                                 }
1260                         
1261                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1262                                 {
1263                                 if (algo_strength & SSL_EXP_MASK)
1264                                         {
1265                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1266                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1267                                         }
1268                                 else
1269                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1270                                 }
1271
1272                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1273                                 {
1274                                 if (algo_strength & SSL_STRONG_MASK)
1275                                         {
1276                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1277                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1278                                         }
1279                                 else
1280                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1281                                 }
1282                         
1283                         if (ca_list[j]->valid)
1284                                 {
1285                                 /* explicit ciphersuite found; its protocol version
1286                                  * does not become part of the search pattern!*/
1287
1288                                 cipher_id = ca_list[j]->id;
1289                                 }
1290                         else
1291                                 {
1292                                 /* not an explicit ciphersuite; only in this case, the
1293                                  * protocol version is considered part of the search pattern */
1294
1295                                 if (ca_list[j]->algorithm_ssl)
1296                                         {
1297                                         if (alg_ssl)
1298                                                 {
1299                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1300                                                 if (!alg_ssl) { found = 0; break; }
1301                                                 }
1302                                         else
1303                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1304                                         }
1305                                 }
1306                         
1307                         if (!multi) break;
1308                         }
1309
1310                 /*
1311                  * Ok, we have the rule, now apply it
1312                  */
1313                 if (rule == CIPHER_SPECIAL)
1314                         {       /* special command */
1315                         ok = 0;
1316                         if ((buflen == 8) &&
1317                                 !strncmp(buf, "STRENGTH", 8))
1318                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1319                         else
1320                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1321                                         SSL_R_INVALID_COMMAND);
1322                         if (ok == 0)
1323                                 retval = 0;
1324                         /*
1325                          * We do not support any "multi" options
1326                          * together with "@", so throw away the
1327                          * rest of the command, if any left, until
1328                          * end or ':' is found.
1329                          */
1330                         while ((*l != '\0') && !ITEM_SEP(*l))
1331                                 l++;
1332                         }
1333                 else if (found)
1334                         {
1335                         ssl_cipher_apply_rule(cipher_id,
1336                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1337                                 rule, -1, head_p, tail_p);
1338                         }
1339                 else
1340                         {
1341                         while ((*l != '\0') && !ITEM_SEP(*l))
1342                                 l++;
1343                         }
1344                 if (*l == '\0') break; /* done */
1345                 }
1346
1347         return(retval);
1348         }
1349
1350 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1351                                         const char **prule_str)
1352         {
1353         unsigned int suiteb_flags = 0;
1354         if (!strcmp(*prule_str, "SUITEB128"))
1355                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1356         else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1357                 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1358         else if (!strcmp(*prule_str, "SUITEB192"))
1359                 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1360
1361         if (suiteb_flags)
1362                 {
1363                 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1364                 c->cert_flags |= suiteb_flags;
1365                 }
1366         else
1367                 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1368
1369         if (!suiteb_flags)
1370                 return 1;
1371         /* Check version */
1372
1373         switch(suiteb_flags)
1374                 {
1375         case SSL_CERT_FLAG_SUITEB_128_LOS:
1376                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1377                 break;
1378         case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1379                 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1380                 break;
1381         case SSL_CERT_FLAG_SUITEB_192_LOS:
1382                 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1383                 break;
1384                 }
1385         return 1;
1386         }
1387
1388
1389 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1390                 STACK_OF(SSL_CIPHER) **cipher_list,
1391                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1392                 const char *rule_str, CERT *c)
1393         {
1394         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1395         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1396         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1397         const char *rule_p;
1398         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1399         const SSL_CIPHER **ca_list = NULL;
1400
1401         /*
1402          * Return with error if nothing to do.
1403          */
1404         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1405                 return NULL;
1406
1407         if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1408                 return NULL;
1409
1410
1411         /*
1412          * To reduce the work to do we only want to process the compiled
1413          * in algorithms, so we first get the mask of disabled ciphers.
1414          */
1415         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1416
1417         /*
1418          * Now we have to collect the available ciphers from the compiled
1419          * in ciphers. We cannot get more than the number compiled in, so
1420          * it is used for allocation.
1421          */
1422         num_of_ciphers = ssl_method->num_ciphers();
1423 #ifdef KSSL_DEBUG
1424         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1425 #endif    /* KSSL_DEBUG */
1426         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1427         if (co_list == NULL)
1428                 {
1429                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1430                 return(NULL);   /* Failure */
1431                 }
1432
1433         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1434                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1435                                    co_list, &head, &tail);
1436
1437
1438         /* Now arrange all ciphers by preference: */
1439
1440         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1441         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1442         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1443
1444         /* AES is our preferred symmetric cipher */
1445         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1446
1447         /* Temporarily enable everything else for sorting */
1448         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1449
1450         /* Low priority for MD5 */
1451         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1452
1453         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1454          * (For applications that allow them, they aren't too bad, but we prefer
1455          * authenticated ciphers.) */
1456         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1457
1458         /* Move ciphers without forward secrecy to the end */
1459         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1460         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1461         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1462         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1463         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1464
1465         /* RC4 is sort-of broken -- move the the end */
1466         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1467
1468         /* Now sort by symmetric encryption strength.  The above ordering remains
1469          * in force within each class */
1470         if (!ssl_cipher_strength_sort(&head, &tail))
1471                 {
1472                 OPENSSL_free(co_list);
1473                 return NULL;
1474                 }
1475
1476         /* Now disable everything (maintaining the ordering!) */
1477         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1478
1479
1480         /*
1481          * We also need cipher aliases for selecting based on the rule_str.
1482          * There might be two types of entries in the rule_str: 1) names
1483          * of ciphers themselves 2) aliases for groups of ciphers.
1484          * For 1) we need the available ciphers and for 2) the cipher
1485          * groups of cipher_aliases added together in one list (otherwise
1486          * we would be happy with just the cipher_aliases table).
1487          */
1488         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1489         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1490         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1491         if (ca_list == NULL)
1492                 {
1493                 OPENSSL_free(co_list);
1494                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1495                 return(NULL);   /* Failure */
1496                 }
1497         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1498                                    disabled_mkey, disabled_auth, disabled_enc,
1499                                    disabled_mac, disabled_ssl, head);
1500
1501         /*
1502          * If the rule_string begins with DEFAULT, apply the default rule
1503          * before using the (possibly available) additional rules.
1504          */
1505         ok = 1;
1506         rule_p = rule_str;
1507         if (strncmp(rule_str,"DEFAULT",7) == 0)
1508                 {
1509                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1510                         &head, &tail, ca_list);
1511                 rule_p += 7;
1512                 if (*rule_p == ':')
1513                         rule_p++;
1514                 }
1515
1516         if (ok && (strlen(rule_p) > 0))
1517                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1518
1519         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1520
1521         if (!ok)
1522                 {       /* Rule processing failure */
1523                 OPENSSL_free(co_list);
1524                 return(NULL);
1525                 }
1526         
1527         /*
1528          * Allocate new "cipherstack" for the result, return with error
1529          * if we cannot get one.
1530          */
1531         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1532                 {
1533                 OPENSSL_free(co_list);
1534                 return(NULL);
1535                 }
1536
1537         /*
1538          * The cipher selection for the list is done. The ciphers are added
1539          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1540          */
1541         for (curr = head; curr != NULL; curr = curr->next)
1542                 {
1543 #ifdef OPENSSL_FIPS
1544                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1545 #else
1546                 if (curr->active)
1547 #endif
1548                         {
1549                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1550 #ifdef CIPHER_DEBUG
1551                         printf("<%s>\n",curr->cipher->name);
1552 #endif
1553                         }
1554                 }
1555         OPENSSL_free(co_list);  /* Not needed any longer */
1556
1557         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1558         if (tmp_cipher_list == NULL)
1559                 {
1560                 sk_SSL_CIPHER_free(cipherstack);
1561                 return NULL;
1562                 }
1563         if (*cipher_list != NULL)
1564                 sk_SSL_CIPHER_free(*cipher_list);
1565         *cipher_list = cipherstack;
1566         if (*cipher_list_by_id != NULL)
1567                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1568         *cipher_list_by_id = tmp_cipher_list;
1569         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1570
1571         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1572         return(cipherstack);
1573         }
1574
1575 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1576         {
1577         int is_export,pkl,kl;
1578         const char *ver,*exp_str;
1579         const char *kx,*au,*enc,*mac;
1580         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1581 #ifdef KSSL_DEBUG
1582         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1583 #else
1584         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1585 #endif /* KSSL_DEBUG */
1586
1587         alg_mkey = cipher->algorithm_mkey;
1588         alg_auth = cipher->algorithm_auth;
1589         alg_enc = cipher->algorithm_enc;
1590         alg_mac = cipher->algorithm_mac;
1591         alg_ssl = cipher->algorithm_ssl;
1592
1593         alg2=cipher->algorithm2;
1594
1595         is_export=SSL_C_IS_EXPORT(cipher);
1596         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1597         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1598         exp_str=is_export?" export":"";
1599         
1600         if (alg_ssl & SSL_SSLV2)
1601                 ver="SSLv2";
1602         else if (alg_ssl & SSL_SSLV3)
1603                 ver="SSLv3";
1604         else if (alg_ssl & SSL_TLSV1_2)
1605                 ver="TLSv1.2";
1606         else
1607                 ver="unknown";
1608
1609         switch (alg_mkey)
1610                 {
1611         case SSL_kRSA:
1612                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1613                 break;
1614         case SSL_kDHr:
1615                 kx="DH/RSA";
1616                 break;
1617         case SSL_kDHd:
1618                 kx="DH/DSS";
1619                 break;
1620         case SSL_kKRB5:
1621                 kx="KRB5";
1622                 break;
1623         case SSL_kEDH:
1624                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1625                 break;
1626         case SSL_kECDHr:
1627                 kx="ECDH/RSA";
1628                 break;
1629         case SSL_kECDHe:
1630                 kx="ECDH/ECDSA";
1631                 break;
1632         case SSL_kEECDH:
1633                 kx="ECDH";
1634                 break;
1635         case SSL_kPSK:
1636                 kx="PSK";
1637                 break;
1638         case SSL_kSRP:
1639                 kx="SRP";
1640                 break;
1641         default:
1642                 kx="unknown";
1643                 }
1644
1645         switch (alg_auth)
1646                 {
1647         case SSL_aRSA:
1648                 au="RSA";
1649                 break;
1650         case SSL_aDSS:
1651                 au="DSS";
1652                 break;
1653         case SSL_aDH:
1654                 au="DH";
1655                 break;
1656         case SSL_aKRB5:
1657                 au="KRB5";
1658                 break;
1659         case SSL_aECDH:
1660                 au="ECDH";
1661                 break;
1662         case SSL_aNULL:
1663                 au="None";
1664                 break;
1665         case SSL_aECDSA:
1666                 au="ECDSA";
1667                 break;
1668         case SSL_aPSK:
1669                 au="PSK";
1670                 break;
1671         default:
1672                 au="unknown";
1673                 break;
1674                 }
1675
1676         switch (alg_enc)
1677                 {
1678         case SSL_DES:
1679                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1680                 break;
1681         case SSL_3DES:
1682                 enc="3DES(168)";
1683                 break;
1684         case SSL_RC4:
1685                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1686                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1687                 break;
1688         case SSL_RC2:
1689                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1690                 break;
1691         case SSL_IDEA:
1692                 enc="IDEA(128)";
1693                 break;
1694         case SSL_eNULL:
1695                 enc="None";
1696                 break;
1697         case SSL_AES128:
1698                 enc="AES(128)";
1699                 break;
1700         case SSL_AES256:
1701                 enc="AES(256)";
1702                 break;
1703         case SSL_AES128GCM:
1704                 enc="AESGCM(128)";
1705                 break;
1706         case SSL_AES256GCM:
1707                 enc="AESGCM(256)";
1708                 break;
1709         case SSL_CAMELLIA128:
1710                 enc="Camellia(128)";
1711                 break;
1712         case SSL_CAMELLIA256:
1713                 enc="Camellia(256)";
1714                 break;
1715         case SSL_SEED:
1716                 enc="SEED(128)";
1717                 break;
1718         default:
1719                 enc="unknown";
1720                 break;
1721                 }
1722
1723         switch (alg_mac)
1724                 {
1725         case SSL_MD5:
1726                 mac="MD5";
1727                 break;
1728         case SSL_SHA1:
1729                 mac="SHA1";
1730                 break;
1731         case SSL_SHA256:
1732                 mac="SHA256";
1733                 break;
1734         case SSL_SHA384:
1735                 mac="SHA384";
1736                 break;
1737         case SSL_AEAD:
1738                 mac="AEAD";
1739                 break;
1740         default:
1741                 mac="unknown";
1742                 break;
1743                 }
1744
1745         if (buf == NULL)
1746                 {
1747                 len=128;
1748                 buf=OPENSSL_malloc(len);
1749                 if (buf == NULL) return("OPENSSL_malloc Error");
1750                 }
1751         else if (len < 128)
1752                 return("Buffer too small");
1753
1754 #ifdef KSSL_DEBUG
1755         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1756 #else
1757         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1758 #endif /* KSSL_DEBUG */
1759         return(buf);
1760         }
1761
1762 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1763         {
1764         int i;
1765
1766         if (c == NULL) return("(NONE)");
1767         i=(int)(c->id>>24L);
1768         if (i == 3)
1769                 return("TLSv1/SSLv3");
1770         else if (i == 2)
1771                 return("SSLv2");
1772         else
1773                 return("unknown");
1774         }
1775
1776 /* return the actual cipher being used */
1777 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1778         {
1779         if (c != NULL)
1780                 return(c->name);
1781         return("(NONE)");
1782         }
1783
1784 /* number of bits for symmetric cipher */
1785 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1786         {
1787         int ret=0;
1788
1789         if (c != NULL)
1790                 {
1791                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1792                 ret = c->strength_bits;
1793                 }
1794         return(ret);
1795         }
1796
1797 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1798         {
1799         return c->id;
1800         }
1801
1802 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1803         {
1804         SSL_COMP *ctmp;
1805         int i,nn;
1806
1807         if ((n == 0) || (sk == NULL)) return(NULL);
1808         nn=sk_SSL_COMP_num(sk);
1809         for (i=0; i<nn; i++)
1810                 {
1811                 ctmp=sk_SSL_COMP_value(sk,i);
1812                 if (ctmp->id == n)
1813                         return(ctmp);
1814                 }
1815         return(NULL);
1816         }
1817
1818 #ifdef OPENSSL_NO_COMP
1819 void *SSL_COMP_get_compression_methods(void)
1820         {
1821         return NULL;
1822         }
1823 int SSL_COMP_add_compression_method(int id, void *cm)
1824         {
1825         return 1;
1826         }
1827
1828 const char *SSL_COMP_get_name(const void *comp)
1829         {
1830         return NULL;
1831         }
1832 #else
1833 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1834         {
1835         load_builtin_compressions();
1836         return(ssl_comp_methods);
1837         }
1838
1839 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1840         {
1841         SSL_COMP *comp;
1842
1843         if (cm == NULL || cm->type == NID_undef)
1844                 return 1;
1845
1846         /* According to draft-ietf-tls-compression-04.txt, the
1847            compression number ranges should be the following:
1848
1849            0 to 63:    methods defined by the IETF
1850            64 to 192:  external party methods assigned by IANA
1851            193 to 255: reserved for private use */
1852         if (id < 193 || id > 255)
1853                 {
1854                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1855                 return 0;
1856                 }
1857
1858         MemCheck_off();
1859         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1860         comp->id=id;
1861         comp->method=cm;
1862         load_builtin_compressions();
1863         if (ssl_comp_methods
1864                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1865                 {
1866                 OPENSSL_free(comp);
1867                 MemCheck_on();
1868                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1869                 return(1);
1870                 }
1871         else if ((ssl_comp_methods == NULL)
1872                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1873                 {
1874                 OPENSSL_free(comp);
1875                 MemCheck_on();
1876                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1877                 return(1);
1878                 }
1879         else
1880                 {
1881                 MemCheck_on();
1882                 return(0);
1883                 }
1884         }
1885
1886 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1887         {
1888         if (comp)
1889                 return comp->name;
1890         return NULL;
1891         }
1892 #endif
1893 /* For a cipher return the index corresponding to the certificate type */
1894 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1895         {
1896         unsigned long alg_k, alg_a;
1897
1898         alg_k = c->algorithm_mkey;
1899         alg_a = c->algorithm_auth;
1900
1901         if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1902                 {
1903                 /* we don't need to look at SSL_kEECDH
1904                  * since no certificate is needed for
1905                  * anon ECDH and for authenticated
1906                  * EECDH, the check for the auth
1907                  * algorithm will set i correctly
1908                  * NOTE: For ECDH-RSA, we need an ECC
1909                  * not an RSA cert but for EECDH-RSA
1910                  * we need an RSA cert. Placing the
1911                  * checks for SSL_kECDH before RSA
1912                  * checks ensures the correct cert is chosen.
1913                  */
1914                 return SSL_PKEY_ECC;
1915                 }
1916         else if (alg_a & SSL_aECDSA)
1917                 return SSL_PKEY_ECC;
1918         else if (alg_k & SSL_kDHr)
1919                 return SSL_PKEY_DH_RSA;
1920         else if (alg_k & SSL_kDHd)
1921                 return SSL_PKEY_DH_DSA;
1922         else if (alg_a & SSL_aDSS)
1923                 return SSL_PKEY_DSA_SIGN;
1924         else if (alg_a & SSL_aRSA)
1925                 return SSL_PKEY_RSA_ENC;
1926         else if (alg_a & SSL_aKRB5)
1927                 /* VRS something else here? */
1928                 return -1;
1929         else if (alg_a & SSL_aGOST94) 
1930                 return SSL_PKEY_GOST94;
1931         else if (alg_a & SSL_aGOST01)
1932                 return SSL_PKEY_GOST01;
1933         return -1;
1934         }
1935
1936 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
1937         {
1938         const SSL_CIPHER *c;
1939         c = ssl->method->get_cipher_by_char(ptr);
1940         if (c == NULL || c->valid == 0)
1941                 return NULL;
1942         return c;
1943         }
1944
1945 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
1946         {
1947         return ssl->method->get_cipher_by_char(ptr);
1948         }