b96d26faba2eb9c4e48b7ddcc60008a0bef15ab9
[dragonfly.git] / crypto / openssl / 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}, /* no such ciphersuites supported! */
242         {0,SSL_TXT_kDHd,0,    SSL_kDHd,  0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
243         {0,SSL_TXT_kDH,0,     SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
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                 if      (c->algorithm_enc == SSL_RC4 &&
624                          c->algorithm_mac == SSL_MD5 &&
625                          (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
626                         *enc = evp, *md = NULL;
627                 else if (c->algorithm_enc == SSL_AES128 &&
628                          c->algorithm_mac == SSL_SHA1 &&
629                          (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
630                         *enc = evp, *md = NULL;
631                 else if (c->algorithm_enc == SSL_AES256 &&
632                          c->algorithm_mac == SSL_SHA1 &&
633                          (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
634                         *enc = evp, *md = NULL;
635                 return(1);
636                 }
637         else
638                 return(0);
639         }
640
641 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md) 
642 {
643         if (idx <0||idx>=SSL_MD_NUM_IDX) 
644                 {
645                 return 0;
646                 }
647         *mask = ssl_handshake_digest_flag[idx];
648         if (*mask)
649                 *md = ssl_digest_methods[idx];
650         else
651                 *md = NULL;
652         return 1;
653 }
654
655 #define ITEM_SEP(a) \
656         (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
657
658 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
659              CIPHER_ORDER **tail)
660         {
661         if (curr == *tail) return;
662         if (curr == *head)
663                 *head=curr->next;
664         if (curr->prev != NULL)
665                 curr->prev->next=curr->next;
666         if (curr->next != NULL)
667                 curr->next->prev=curr->prev;
668         (*tail)->next=curr;
669         curr->prev= *tail;
670         curr->next=NULL;
671         *tail=curr;
672         }
673
674 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
675              CIPHER_ORDER **tail)
676         {
677         if (curr == *head) return;
678         if (curr == *tail)
679                 *tail=curr->prev;
680         if (curr->next != NULL)
681                 curr->next->prev=curr->prev;
682         if (curr->prev != NULL)
683                 curr->prev->next=curr->next;
684         (*head)->prev=curr;
685         curr->next= *head;
686         curr->prev=NULL;
687         *head=curr;
688         }
689
690 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
691         {
692         *mkey = 0;
693         *auth = 0;
694         *enc = 0;
695         *mac = 0;
696         *ssl = 0;
697
698 #ifdef OPENSSL_NO_RSA
699         *mkey |= SSL_kRSA;
700         *auth |= SSL_aRSA;
701 #endif
702 #ifdef OPENSSL_NO_DSA
703         *auth |= SSL_aDSS;
704 #endif
705         *mkey |= SSL_kDHr|SSL_kDHd; /* no such ciphersuites supported! */
706         *auth |= SSL_aDH;
707 #ifdef OPENSSL_NO_DH
708         *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
709         *auth |= SSL_aDH;
710 #endif
711 #ifdef OPENSSL_NO_KRB5
712         *mkey |= SSL_kKRB5;
713         *auth |= SSL_aKRB5;
714 #endif
715 #ifdef OPENSSL_NO_ECDSA
716         *auth |= SSL_aECDSA;
717 #endif
718 #ifdef OPENSSL_NO_ECDH
719         *mkey |= SSL_kECDHe|SSL_kECDHr;
720         *auth |= SSL_aECDH;
721 #endif
722 #ifdef OPENSSL_NO_PSK
723         *mkey |= SSL_kPSK;
724         *auth |= SSL_aPSK;
725 #endif
726 #ifdef OPENSSL_NO_SRP
727         *mkey |= SSL_kSRP;
728 #endif
729         /* Check for presence of GOST 34.10 algorithms, and if they
730          * do not present, disable  appropriate auth and key exchange */
731         if (!get_optional_pkey_id("gost94")) {
732                 *auth |= SSL_aGOST94;
733         }
734         if (!get_optional_pkey_id("gost2001")) {
735                 *auth |= SSL_aGOST01;
736         }
737         /* Disable GOST key exchange if no GOST signature algs are available * */
738         if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
739                 *mkey |= SSL_kGOST;
740         }       
741 #ifdef SSL_FORBID_ENULL
742         *enc |= SSL_eNULL;
743 #endif
744                 
745
746
747         *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
748         *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
749         *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
750         *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
751         *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
752         *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
753         *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
754         *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
755         *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
756         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
757         *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
758         *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
759         *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
760
761         *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
762         *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
763         *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
764         *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
765         *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
766         *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
767
768         }
769
770 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
771                 int num_of_ciphers,
772                 unsigned long disabled_mkey, unsigned long disabled_auth,
773                 unsigned long disabled_enc, unsigned long disabled_mac,
774                 unsigned long disabled_ssl,
775                 CIPHER_ORDER *co_list,
776                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
777         {
778         int i, co_list_num;
779         const SSL_CIPHER *c;
780
781         /*
782          * We have num_of_ciphers descriptions compiled in, depending on the
783          * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
784          * These will later be sorted in a linked list with at most num
785          * entries.
786          */
787
788         /* Get the initial list of ciphers */
789         co_list_num = 0;        /* actual count of ciphers */
790         for (i = 0; i < num_of_ciphers; i++)
791                 {
792                 c = ssl_method->get_cipher(i);
793                 /* drop those that use any of that is not available */
794                 if ((c != NULL) && c->valid &&
795 #ifdef OPENSSL_FIPS
796                     (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
797 #endif
798                     !(c->algorithm_mkey & disabled_mkey) &&
799                     !(c->algorithm_auth & disabled_auth) &&
800                     !(c->algorithm_enc & disabled_enc) &&
801                     !(c->algorithm_mac & disabled_mac) &&
802                     !(c->algorithm_ssl & disabled_ssl))
803                         {
804                         co_list[co_list_num].cipher = c;
805                         co_list[co_list_num].next = NULL;
806                         co_list[co_list_num].prev = NULL;
807                         co_list[co_list_num].active = 0;
808                         co_list_num++;
809 #ifdef KSSL_DEBUG
810                         printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
811 #endif  /* KSSL_DEBUG */
812                         /*
813                         if (!sk_push(ca_list,(char *)c)) goto err;
814                         */
815                         }
816                 }
817
818         /*
819          * Prepare linked list from list entries
820          */     
821         if (co_list_num > 0)
822                 {
823                 co_list[0].prev = NULL;
824
825                 if (co_list_num > 1)
826                         {
827                         co_list[0].next = &co_list[1];
828                         
829                         for (i = 1; i < co_list_num - 1; i++)
830                                 {
831                                 co_list[i].prev = &co_list[i - 1];
832                                 co_list[i].next = &co_list[i + 1];
833                                 }
834
835                         co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
836                         }
837                 
838                 co_list[co_list_num - 1].next = NULL;
839
840                 *head_p = &co_list[0];
841                 *tail_p = &co_list[co_list_num - 1];
842                 }
843         }
844
845 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
846                         int num_of_group_aliases,
847                         unsigned long disabled_mkey, unsigned long disabled_auth,
848                         unsigned long disabled_enc, unsigned long disabled_mac,
849                         unsigned long disabled_ssl,
850                         CIPHER_ORDER *head)
851         {
852         CIPHER_ORDER *ciph_curr;
853         const SSL_CIPHER **ca_curr;
854         int i;
855         unsigned long mask_mkey = ~disabled_mkey;
856         unsigned long mask_auth = ~disabled_auth;
857         unsigned long mask_enc = ~disabled_enc;
858         unsigned long mask_mac = ~disabled_mac;
859         unsigned long mask_ssl = ~disabled_ssl;
860
861         /*
862          * First, add the real ciphers as already collected
863          */
864         ciph_curr = head;
865         ca_curr = ca_list;
866         while (ciph_curr != NULL)
867                 {
868                 *ca_curr = ciph_curr->cipher;
869                 ca_curr++;
870                 ciph_curr = ciph_curr->next;
871                 }
872
873         /*
874          * Now we add the available ones from the cipher_aliases[] table.
875          * They represent either one or more algorithms, some of which
876          * in any affected category must be supported (set in enabled_mask),
877          * or represent a cipher strength value (will be added in any case because algorithms=0).
878          */
879         for (i = 0; i < num_of_group_aliases; i++)
880                 {
881                 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
882                 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
883                 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
884                 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
885                 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
886
887                 if (algorithm_mkey)
888                         if ((algorithm_mkey & mask_mkey) == 0)
889                                 continue;
890         
891                 if (algorithm_auth)
892                         if ((algorithm_auth & mask_auth) == 0)
893                                 continue;
894                 
895                 if (algorithm_enc)
896                         if ((algorithm_enc & mask_enc) == 0)
897                                 continue;
898                 
899                 if (algorithm_mac)
900                         if ((algorithm_mac & mask_mac) == 0)
901                                 continue;
902                 
903                 if (algorithm_ssl)
904                         if ((algorithm_ssl & mask_ssl) == 0)
905                                 continue;
906                 
907                 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
908                 ca_curr++;
909                 }
910
911         *ca_curr = NULL;        /* end of list */
912         }
913
914 static void ssl_cipher_apply_rule(unsigned long cipher_id,
915                 unsigned long alg_mkey, unsigned long alg_auth,
916                 unsigned long alg_enc, unsigned long alg_mac,
917                 unsigned long alg_ssl,
918                 unsigned long algo_strength,
919                 int rule, int strength_bits,
920                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
921         {
922         CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
923         const SSL_CIPHER *cp;
924         int reverse = 0;
925
926 #ifdef CIPHER_DEBUG
927         printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
928                 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
929 #endif
930
931         if (rule == CIPHER_DEL)
932                 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
933
934         head = *head_p;
935         tail = *tail_p;
936
937         if (reverse)
938                 {
939                 curr = tail;
940                 last = head;
941                 }
942         else
943                 {
944                 curr = head;
945                 last = tail;
946                 }
947
948         curr2 = curr;
949         for (;;)
950                 {
951                 if ((curr == NULL) || (curr == last)) break;
952                 curr = curr2;
953                 curr2 = reverse ? curr->prev : curr->next;
954
955                 cp = curr->cipher;
956
957                 /*
958                  * Selection criteria is either the value of strength_bits
959                  * or the algorithms used.
960                  */
961                 if (strength_bits >= 0)
962                         {
963                         if (strength_bits != cp->strength_bits)
964                                 continue;
965                         }
966                 else
967                         {
968 #ifdef CIPHER_DEBUG
969                         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);
970 #endif
971
972                         if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
973                                 continue;
974                         if (alg_auth && !(alg_auth & cp->algorithm_auth))
975                                 continue;
976                         if (alg_enc && !(alg_enc & cp->algorithm_enc))
977                                 continue;
978                         if (alg_mac && !(alg_mac & cp->algorithm_mac))
979                                 continue;
980                         if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
981                                 continue;
982                         if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
983                                 continue;
984                         if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
985                                 continue;
986                         }
987
988 #ifdef CIPHER_DEBUG
989                 printf("Action = %d\n", rule);
990 #endif
991
992                 /* add the cipher if it has not been added yet. */
993                 if (rule == CIPHER_ADD)
994                         {
995                         /* reverse == 0 */
996                         if (!curr->active)
997                                 {
998                                 ll_append_tail(&head, curr, &tail);
999                                 curr->active = 1;
1000                                 }
1001                         }
1002                 /* Move the added cipher to this location */
1003                 else if (rule == CIPHER_ORD)
1004                         {
1005                         /* reverse == 0 */
1006                         if (curr->active)
1007                                 {
1008                                 ll_append_tail(&head, curr, &tail);
1009                                 }
1010                         }
1011                 else if (rule == CIPHER_DEL)
1012                         {
1013                         /* reverse == 1 */
1014                         if (curr->active)
1015                                 {
1016                                 /* most recently deleted ciphersuites get best positions
1017                                  * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1018                                  * works in reverse to maintain the order) */
1019                                 ll_append_head(&head, curr, &tail);
1020                                 curr->active = 0;
1021                                 }
1022                         }
1023                 else if (rule == CIPHER_KILL)
1024                         {
1025                         /* reverse == 0 */
1026                         if (head == curr)
1027                                 head = curr->next;
1028                         else
1029                                 curr->prev->next = curr->next;
1030                         if (tail == curr)
1031                                 tail = curr->prev;
1032                         curr->active = 0;
1033                         if (curr->next != NULL)
1034                                 curr->next->prev = curr->prev;
1035                         if (curr->prev != NULL)
1036                                 curr->prev->next = curr->next;
1037                         curr->next = NULL;
1038                         curr->prev = NULL;
1039                         }
1040                 }
1041
1042         *head_p = head;
1043         *tail_p = tail;
1044         }
1045
1046 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1047                                     CIPHER_ORDER **tail_p)
1048         {
1049         int max_strength_bits, i, *number_uses;
1050         CIPHER_ORDER *curr;
1051
1052         /*
1053          * This routine sorts the ciphers with descending strength. The sorting
1054          * must keep the pre-sorted sequence, so we apply the normal sorting
1055          * routine as '+' movement to the end of the list.
1056          */
1057         max_strength_bits = 0;
1058         curr = *head_p;
1059         while (curr != NULL)
1060                 {
1061                 if (curr->active &&
1062                     (curr->cipher->strength_bits > max_strength_bits))
1063                     max_strength_bits = curr->cipher->strength_bits;
1064                 curr = curr->next;
1065                 }
1066
1067         number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1068         if (!number_uses)
1069                 {
1070                 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1071                 return(0);
1072                 }
1073         memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1074
1075         /*
1076          * Now find the strength_bits values actually used
1077          */
1078         curr = *head_p;
1079         while (curr != NULL)
1080                 {
1081                 if (curr->active)
1082                         number_uses[curr->cipher->strength_bits]++;
1083                 curr = curr->next;
1084                 }
1085         /*
1086          * Go through the list of used strength_bits values in descending
1087          * order.
1088          */
1089         for (i = max_strength_bits; i >= 0; i--)
1090                 if (number_uses[i] > 0)
1091                         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1092
1093         OPENSSL_free(number_uses);
1094         return(1);
1095         }
1096
1097 static int ssl_cipher_process_rulestr(const char *rule_str,
1098                 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1099                 const SSL_CIPHER **ca_list)
1100         {
1101         unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1102         const char *l, *buf;
1103         int j, multi, found, rule, retval, ok, buflen;
1104         unsigned long cipher_id = 0;
1105         char ch;
1106
1107         retval = 1;
1108         l = rule_str;
1109         for (;;)
1110                 {
1111                 ch = *l;
1112
1113                 if (ch == '\0')
1114                         break;          /* done */
1115                 if (ch == '-')
1116                         { rule = CIPHER_DEL; l++; }
1117                 else if (ch == '+')
1118                         { rule = CIPHER_ORD; l++; }
1119                 else if (ch == '!')
1120                         { rule = CIPHER_KILL; l++; }
1121                 else if (ch == '@')
1122                         { rule = CIPHER_SPECIAL; l++; }
1123                 else
1124                         { rule = CIPHER_ADD; }
1125
1126                 if (ITEM_SEP(ch))
1127                         {
1128                         l++;
1129                         continue;
1130                         }
1131
1132                 alg_mkey = 0;
1133                 alg_auth = 0;
1134                 alg_enc = 0;
1135                 alg_mac = 0;
1136                 alg_ssl = 0;
1137                 algo_strength = 0;
1138
1139                 for (;;)
1140                         {
1141                         ch = *l;
1142                         buf = l;
1143                         buflen = 0;
1144 #ifndef CHARSET_EBCDIC
1145                         while ( ((ch >= 'A') && (ch <= 'Z')) ||
1146                                 ((ch >= '0') && (ch <= '9')) ||
1147                                 ((ch >= 'a') && (ch <= 'z')) ||
1148                                  (ch == '-'))
1149 #else
1150                         while ( isalnum(ch) || (ch == '-'))
1151 #endif
1152                                  {
1153                                  ch = *(++l);
1154                                  buflen++;
1155                                  }
1156
1157                         if (buflen == 0)
1158                                 {
1159                                 /*
1160                                  * We hit something we cannot deal with,
1161                                  * it is no command or separator nor
1162                                  * alphanumeric, so we call this an error.
1163                                  */
1164                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1165                                        SSL_R_INVALID_COMMAND);
1166                                 retval = found = 0;
1167                                 l++;
1168                                 break;
1169                                 }
1170
1171                         if (rule == CIPHER_SPECIAL)
1172                                 {
1173                                 found = 0; /* unused -- avoid compiler warning */
1174                                 break;  /* special treatment */
1175                                 }
1176
1177                         /* check for multi-part specification */
1178                         if (ch == '+')
1179                                 {
1180                                 multi=1;
1181                                 l++;
1182                                 }
1183                         else
1184                                 multi=0;
1185
1186                         /*
1187                          * Now search for the cipher alias in the ca_list. Be careful
1188                          * with the strncmp, because the "buflen" limitation
1189                          * will make the rule "ADH:SOME" and the cipher
1190                          * "ADH-MY-CIPHER" look like a match for buflen=3.
1191                          * So additionally check whether the cipher name found
1192                          * has the correct length. We can save a strlen() call:
1193                          * just checking for the '\0' at the right place is
1194                          * sufficient, we have to strncmp() anyway. (We cannot
1195                          * use strcmp(), because buf is not '\0' terminated.)
1196                          */
1197                         j = found = 0;
1198                         cipher_id = 0;
1199                         while (ca_list[j])
1200                                 {
1201                                 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1202                                     (ca_list[j]->name[buflen] == '\0'))
1203                                         {
1204                                         found = 1;
1205                                         break;
1206                                         }
1207                                 else
1208                                         j++;
1209                                 }
1210
1211                         if (!found)
1212                                 break;  /* ignore this entry */
1213
1214                         if (ca_list[j]->algorithm_mkey)
1215                                 {
1216                                 if (alg_mkey)
1217                                         {
1218                                         alg_mkey &= ca_list[j]->algorithm_mkey;
1219                                         if (!alg_mkey) { found = 0; break; }
1220                                         }
1221                                 else
1222                                         alg_mkey = ca_list[j]->algorithm_mkey;
1223                                 }
1224
1225                         if (ca_list[j]->algorithm_auth)
1226                                 {
1227                                 if (alg_auth)
1228                                         {
1229                                         alg_auth &= ca_list[j]->algorithm_auth;
1230                                         if (!alg_auth) { found = 0; break; }
1231                                         }
1232                                 else
1233                                         alg_auth = ca_list[j]->algorithm_auth;
1234                                 }
1235                         
1236                         if (ca_list[j]->algorithm_enc)
1237                                 {
1238                                 if (alg_enc)
1239                                         {
1240                                         alg_enc &= ca_list[j]->algorithm_enc;
1241                                         if (!alg_enc) { found = 0; break; }
1242                                         }
1243                                 else
1244                                         alg_enc = ca_list[j]->algorithm_enc;
1245                                 }
1246                                                 
1247                         if (ca_list[j]->algorithm_mac)
1248                                 {
1249                                 if (alg_mac)
1250                                         {
1251                                         alg_mac &= ca_list[j]->algorithm_mac;
1252                                         if (!alg_mac) { found = 0; break; }
1253                                         }
1254                                 else
1255                                         alg_mac = ca_list[j]->algorithm_mac;
1256                                 }
1257                         
1258                         if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1259                                 {
1260                                 if (algo_strength & SSL_EXP_MASK)
1261                                         {
1262                                         algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1263                                         if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1264                                         }
1265                                 else
1266                                         algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1267                                 }
1268
1269                         if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1270                                 {
1271                                 if (algo_strength & SSL_STRONG_MASK)
1272                                         {
1273                                         algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1274                                         if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1275                                         }
1276                                 else
1277                                         algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1278                                 }
1279                         
1280                         if (ca_list[j]->valid)
1281                                 {
1282                                 /* explicit ciphersuite found; its protocol version
1283                                  * does not become part of the search pattern!*/
1284
1285                                 cipher_id = ca_list[j]->id;
1286                                 }
1287                         else
1288                                 {
1289                                 /* not an explicit ciphersuite; only in this case, the
1290                                  * protocol version is considered part of the search pattern */
1291
1292                                 if (ca_list[j]->algorithm_ssl)
1293                                         {
1294                                         if (alg_ssl)
1295                                                 {
1296                                                 alg_ssl &= ca_list[j]->algorithm_ssl;
1297                                                 if (!alg_ssl) { found = 0; break; }
1298                                                 }
1299                                         else
1300                                                 alg_ssl = ca_list[j]->algorithm_ssl;
1301                                         }
1302                                 }
1303                         
1304                         if (!multi) break;
1305                         }
1306
1307                 /*
1308                  * Ok, we have the rule, now apply it
1309                  */
1310                 if (rule == CIPHER_SPECIAL)
1311                         {       /* special command */
1312                         ok = 0;
1313                         if ((buflen == 8) &&
1314                                 !strncmp(buf, "STRENGTH", 8))
1315                                 ok = ssl_cipher_strength_sort(head_p, tail_p);
1316                         else
1317                                 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1318                                         SSL_R_INVALID_COMMAND);
1319                         if (ok == 0)
1320                                 retval = 0;
1321                         /*
1322                          * We do not support any "multi" options
1323                          * together with "@", so throw away the
1324                          * rest of the command, if any left, until
1325                          * end or ':' is found.
1326                          */
1327                         while ((*l != '\0') && !ITEM_SEP(*l))
1328                                 l++;
1329                         }
1330                 else if (found)
1331                         {
1332                         ssl_cipher_apply_rule(cipher_id,
1333                                 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1334                                 rule, -1, head_p, tail_p);
1335                         }
1336                 else
1337                         {
1338                         while ((*l != '\0') && !ITEM_SEP(*l))
1339                                 l++;
1340                         }
1341                 if (*l == '\0') break; /* done */
1342                 }
1343
1344         return(retval);
1345         }
1346
1347 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1348                 STACK_OF(SSL_CIPHER) **cipher_list,
1349                 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1350                 const char *rule_str)
1351         {
1352         int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1353         unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1354         STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1355         const char *rule_p;
1356         CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1357         const SSL_CIPHER **ca_list = NULL;
1358
1359         /*
1360          * Return with error if nothing to do.
1361          */
1362         if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1363                 return NULL;
1364
1365         /*
1366          * To reduce the work to do we only want to process the compiled
1367          * in algorithms, so we first get the mask of disabled ciphers.
1368          */
1369         ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1370
1371         /*
1372          * Now we have to collect the available ciphers from the compiled
1373          * in ciphers. We cannot get more than the number compiled in, so
1374          * it is used for allocation.
1375          */
1376         num_of_ciphers = ssl_method->num_ciphers();
1377 #ifdef KSSL_DEBUG
1378         printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1379 #endif    /* KSSL_DEBUG */
1380         co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1381         if (co_list == NULL)
1382                 {
1383                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1384                 return(NULL);   /* Failure */
1385                 }
1386
1387         ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1388                                    disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1389                                    co_list, &head, &tail);
1390
1391
1392         /* Now arrange all ciphers by preference: */
1393
1394         /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1395         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1396         ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1397
1398         /* AES is our preferred symmetric cipher */
1399         ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1400
1401         /* Temporarily enable everything else for sorting */
1402         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1403
1404         /* Low priority for MD5 */
1405         ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1406
1407         /* Move anonymous ciphers to the end.  Usually, these will remain disabled.
1408          * (For applications that allow them, they aren't too bad, but we prefer
1409          * authenticated ciphers.) */
1410         ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1411
1412         /* Move ciphers without forward secrecy to the end */
1413         ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1414         /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1415         ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1416         ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1417         ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1418
1419         /* RC4 is sort-of broken -- move the the end */
1420         ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1421
1422         /* Now sort by symmetric encryption strength.  The above ordering remains
1423          * in force within each class */
1424         if (!ssl_cipher_strength_sort(&head, &tail))
1425                 {
1426                 OPENSSL_free(co_list);
1427                 return NULL;
1428                 }
1429
1430         /* Now disable everything (maintaining the ordering!) */
1431         ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1432
1433
1434         /*
1435          * We also need cipher aliases for selecting based on the rule_str.
1436          * There might be two types of entries in the rule_str: 1) names
1437          * of ciphers themselves 2) aliases for groups of ciphers.
1438          * For 1) we need the available ciphers and for 2) the cipher
1439          * groups of cipher_aliases added together in one list (otherwise
1440          * we would be happy with just the cipher_aliases table).
1441          */
1442         num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1443         num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1444         ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1445         if (ca_list == NULL)
1446                 {
1447                 OPENSSL_free(co_list);
1448                 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1449                 return(NULL);   /* Failure */
1450                 }
1451         ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1452                                    disabled_mkey, disabled_auth, disabled_enc,
1453                                    disabled_mac, disabled_ssl, head);
1454
1455         /*
1456          * If the rule_string begins with DEFAULT, apply the default rule
1457          * before using the (possibly available) additional rules.
1458          */
1459         ok = 1;
1460         rule_p = rule_str;
1461         if (strncmp(rule_str,"DEFAULT",7) == 0)
1462                 {
1463                 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1464                         &head, &tail, ca_list);
1465                 rule_p += 7;
1466                 if (*rule_p == ':')
1467                         rule_p++;
1468                 }
1469
1470         if (ok && (strlen(rule_p) > 0))
1471                 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1472
1473         OPENSSL_free((void *)ca_list);  /* Not needed anymore */
1474
1475         if (!ok)
1476                 {       /* Rule processing failure */
1477                 OPENSSL_free(co_list);
1478                 return(NULL);
1479                 }
1480         
1481         /*
1482          * Allocate new "cipherstack" for the result, return with error
1483          * if we cannot get one.
1484          */
1485         if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1486                 {
1487                 OPENSSL_free(co_list);
1488                 return(NULL);
1489                 }
1490
1491         /*
1492          * The cipher selection for the list is done. The ciphers are added
1493          * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1494          */
1495         for (curr = head; curr != NULL; curr = curr->next)
1496                 {
1497 #ifdef OPENSSL_FIPS
1498                 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1499 #else
1500                 if (curr->active)
1501 #endif
1502                         {
1503                         sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1504 #ifdef CIPHER_DEBUG
1505                         printf("<%s>\n",curr->cipher->name);
1506 #endif
1507                         }
1508                 }
1509         OPENSSL_free(co_list);  /* Not needed any longer */
1510
1511         tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1512         if (tmp_cipher_list == NULL)
1513                 {
1514                 sk_SSL_CIPHER_free(cipherstack);
1515                 return NULL;
1516                 }
1517         if (*cipher_list != NULL)
1518                 sk_SSL_CIPHER_free(*cipher_list);
1519         *cipher_list = cipherstack;
1520         if (*cipher_list_by_id != NULL)
1521                 sk_SSL_CIPHER_free(*cipher_list_by_id);
1522         *cipher_list_by_id = tmp_cipher_list;
1523         (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1524
1525         sk_SSL_CIPHER_sort(*cipher_list_by_id);
1526         return(cipherstack);
1527         }
1528
1529 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1530         {
1531         int is_export,pkl,kl;
1532         const char *ver,*exp_str;
1533         const char *kx,*au,*enc,*mac;
1534         unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1535 #ifdef KSSL_DEBUG
1536         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1537 #else
1538         static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1539 #endif /* KSSL_DEBUG */
1540
1541         alg_mkey = cipher->algorithm_mkey;
1542         alg_auth = cipher->algorithm_auth;
1543         alg_enc = cipher->algorithm_enc;
1544         alg_mac = cipher->algorithm_mac;
1545         alg_ssl = cipher->algorithm_ssl;
1546
1547         alg2=cipher->algorithm2;
1548
1549         is_export=SSL_C_IS_EXPORT(cipher);
1550         pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1551         kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1552         exp_str=is_export?" export":"";
1553         
1554         if (alg_ssl & SSL_SSLV2)
1555                 ver="SSLv2";
1556         else if (alg_ssl & SSL_SSLV3)
1557                 ver="SSLv3";
1558         else if (alg_ssl & SSL_TLSV1_2)
1559                 ver="TLSv1.2";
1560         else
1561                 ver="unknown";
1562
1563         switch (alg_mkey)
1564                 {
1565         case SSL_kRSA:
1566                 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1567                 break;
1568         case SSL_kDHr:
1569                 kx="DH/RSA";
1570                 break;
1571         case SSL_kDHd:
1572                 kx="DH/DSS";
1573                 break;
1574         case SSL_kKRB5:
1575                 kx="KRB5";
1576                 break;
1577         case SSL_kEDH:
1578                 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1579                 break;
1580         case SSL_kECDHr:
1581                 kx="ECDH/RSA";
1582                 break;
1583         case SSL_kECDHe:
1584                 kx="ECDH/ECDSA";
1585                 break;
1586         case SSL_kEECDH:
1587                 kx="ECDH";
1588                 break;
1589         case SSL_kPSK:
1590                 kx="PSK";
1591                 break;
1592         case SSL_kSRP:
1593                 kx="SRP";
1594                 break;
1595         default:
1596                 kx="unknown";
1597                 }
1598
1599         switch (alg_auth)
1600                 {
1601         case SSL_aRSA:
1602                 au="RSA";
1603                 break;
1604         case SSL_aDSS:
1605                 au="DSS";
1606                 break;
1607         case SSL_aDH:
1608                 au="DH";
1609                 break;
1610         case SSL_aKRB5:
1611                 au="KRB5";
1612                 break;
1613         case SSL_aECDH:
1614                 au="ECDH";
1615                 break;
1616         case SSL_aNULL:
1617                 au="None";
1618                 break;
1619         case SSL_aECDSA:
1620                 au="ECDSA";
1621                 break;
1622         case SSL_aPSK:
1623                 au="PSK";
1624                 break;
1625         default:
1626                 au="unknown";
1627                 break;
1628                 }
1629
1630         switch (alg_enc)
1631                 {
1632         case SSL_DES:
1633                 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1634                 break;
1635         case SSL_3DES:
1636                 enc="3DES(168)";
1637                 break;
1638         case SSL_RC4:
1639                 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1640                   :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1641                 break;
1642         case SSL_RC2:
1643                 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1644                 break;
1645         case SSL_IDEA:
1646                 enc="IDEA(128)";
1647                 break;
1648         case SSL_eNULL:
1649                 enc="None";
1650                 break;
1651         case SSL_AES128:
1652                 enc="AES(128)";
1653                 break;
1654         case SSL_AES256:
1655                 enc="AES(256)";
1656                 break;
1657         case SSL_AES128GCM:
1658                 enc="AESGCM(128)";
1659                 break;
1660         case SSL_AES256GCM:
1661                 enc="AESGCM(256)";
1662                 break;
1663         case SSL_CAMELLIA128:
1664                 enc="Camellia(128)";
1665                 break;
1666         case SSL_CAMELLIA256:
1667                 enc="Camellia(256)";
1668                 break;
1669         case SSL_SEED:
1670                 enc="SEED(128)";
1671                 break;
1672         default:
1673                 enc="unknown";
1674                 break;
1675                 }
1676
1677         switch (alg_mac)
1678                 {
1679         case SSL_MD5:
1680                 mac="MD5";
1681                 break;
1682         case SSL_SHA1:
1683                 mac="SHA1";
1684                 break;
1685         case SSL_SHA256:
1686                 mac="SHA256";
1687                 break;
1688         case SSL_SHA384:
1689                 mac="SHA384";
1690                 break;
1691         case SSL_AEAD:
1692                 mac="AEAD";
1693                 break;
1694         default:
1695                 mac="unknown";
1696                 break;
1697                 }
1698
1699         if (buf == NULL)
1700                 {
1701                 len=128;
1702                 buf=OPENSSL_malloc(len);
1703                 if (buf == NULL) return("OPENSSL_malloc Error");
1704                 }
1705         else if (len < 128)
1706                 return("Buffer too small");
1707
1708 #ifdef KSSL_DEBUG
1709         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1710 #else
1711         BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1712 #endif /* KSSL_DEBUG */
1713         return(buf);
1714         }
1715
1716 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1717         {
1718         int i;
1719
1720         if (c == NULL) return("(NONE)");
1721         i=(int)(c->id>>24L);
1722         if (i == 3)
1723                 return("TLSv1/SSLv3");
1724         else if (i == 2)
1725                 return("SSLv2");
1726         else
1727                 return("unknown");
1728         }
1729
1730 /* return the actual cipher being used */
1731 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1732         {
1733         if (c != NULL)
1734                 return(c->name);
1735         return("(NONE)");
1736         }
1737
1738 /* number of bits for symmetric cipher */
1739 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1740         {
1741         int ret=0;
1742
1743         if (c != NULL)
1744                 {
1745                 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1746                 ret = c->strength_bits;
1747                 }
1748         return(ret);
1749         }
1750
1751 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1752         {
1753         return c->id;
1754         }
1755
1756 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1757         {
1758         SSL_COMP *ctmp;
1759         int i,nn;
1760
1761         if ((n == 0) || (sk == NULL)) return(NULL);
1762         nn=sk_SSL_COMP_num(sk);
1763         for (i=0; i<nn; i++)
1764                 {
1765                 ctmp=sk_SSL_COMP_value(sk,i);
1766                 if (ctmp->id == n)
1767                         return(ctmp);
1768                 }
1769         return(NULL);
1770         }
1771
1772 #ifdef OPENSSL_NO_COMP
1773 void *SSL_COMP_get_compression_methods(void)
1774         {
1775         return NULL;
1776         }
1777 int SSL_COMP_add_compression_method(int id, void *cm)
1778         {
1779         return 1;
1780         }
1781
1782 const char *SSL_COMP_get_name(const void *comp)
1783         {
1784         return NULL;
1785         }
1786 #else
1787 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1788         {
1789         load_builtin_compressions();
1790         return(ssl_comp_methods);
1791         }
1792
1793 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1794         {
1795         SSL_COMP *comp;
1796
1797         if (cm == NULL || cm->type == NID_undef)
1798                 return 1;
1799
1800         /* According to draft-ietf-tls-compression-04.txt, the
1801            compression number ranges should be the following:
1802
1803            0 to 63:    methods defined by the IETF
1804            64 to 192:  external party methods assigned by IANA
1805            193 to 255: reserved for private use */
1806         if (id < 193 || id > 255)
1807                 {
1808                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1809                 return 0;
1810                 }
1811
1812         MemCheck_off();
1813         comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1814         comp->id=id;
1815         comp->method=cm;
1816         load_builtin_compressions();
1817         if (ssl_comp_methods
1818                 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1819                 {
1820                 OPENSSL_free(comp);
1821                 MemCheck_on();
1822                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1823                 return(1);
1824                 }
1825         else if ((ssl_comp_methods == NULL)
1826                 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1827                 {
1828                 OPENSSL_free(comp);
1829                 MemCheck_on();
1830                 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1831                 return(1);
1832                 }
1833         else
1834                 {
1835                 MemCheck_on();
1836                 return(0);
1837                 }
1838         }
1839
1840 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1841         {
1842         if (comp)
1843                 return comp->name;
1844         return NULL;
1845         }
1846
1847 #endif