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