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1 /* ssl/ssl_ciph.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116 /* ====================================================================
117 * Copyright 2005 Nokia. All rights reserved.
118 *
119 * The portions of the attached software ("Contribution") is developed by
120 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
121 * license.
122 *
123 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
124 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
125 * support (see RFC 4279) to OpenSSL.
126 *
127 * No patent licenses or other rights except those expressly stated in
128 * the OpenSSL open source license shall be deemed granted or received
129 * expressly, by implication, estoppel, or otherwise.
130 *
131 * No assurances are provided by Nokia that the Contribution does not
132 * infringe the patent or other intellectual property rights of any third
133 * party or that the license provides you with all the necessary rights
134 * to make use of the Contribution.
135 *
136 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
137 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
138 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
139 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
140 * OTHERWISE.
141 */
142
143 #include <stdio.h>
144 #include <openssl/objects.h>
145 #ifndef OPENSSL_NO_COMP
146 #include <openssl/comp.h>
147 #endif
148 #ifndef OPENSSL_NO_ENGINE
149 #include <openssl/engine.h>
150 #endif
151 #include "ssl_locl.h"
152
153 #define SSL_ENC_DES_IDX 0
154 #define SSL_ENC_3DES_IDX 1
155 #define SSL_ENC_RC4_IDX 2
156 #define SSL_ENC_RC2_IDX 3
157 #define SSL_ENC_IDEA_IDX 4
158 #define SSL_ENC_NULL_IDX 5
159 #define SSL_ENC_AES128_IDX 6
160 #define SSL_ENC_AES256_IDX 7
161 #define SSL_ENC_CAMELLIA128_IDX 8
162 #define SSL_ENC_CAMELLIA256_IDX 9
163 #define SSL_ENC_GOST89_IDX 10
164 #define SSL_ENC_SEED_IDX 11
165 #define SSL_ENC_AES128GCM_IDX 12
166 #define SSL_ENC_AES256GCM_IDX 13
167 #define SSL_ENC_NUM_IDX 14
168
169
170 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
171 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
172 };
173
174 #define SSL_COMP_NULL_IDX 0
175 #define SSL_COMP_ZLIB_IDX 1
176 #define SSL_COMP_NUM_IDX 2
177
178 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
179
180 #define SSL_MD_MD5_IDX 0
181 #define SSL_MD_SHA1_IDX 1
182 #define SSL_MD_GOST94_IDX 2
183 #define SSL_MD_GOST89MAC_IDX 3
184 #define SSL_MD_SHA256_IDX 4
185 #define SSL_MD_SHA384_IDX 5
186 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
187 * defined in the
188 * ssl_locl.h */
189 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
190 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
191 NULL,NULL,NULL,NULL,NULL,NULL
192 };
193 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
194 * implementation is engine-provided, we'll fill it only if
195 * corresponding EVP_PKEY_METHOD is found
196 */
197 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
198 EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,
199 EVP_PKEY_HMAC,EVP_PKEY_HMAC
200 };
201
202 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
203 0,0,0,0,0,0
204 };
205
206 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
207 SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
208 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
209 SSL_HANDSHAKE_MAC_SHA384
210 };
211
212 #define CIPHER_ADD 1
213 #define CIPHER_KILL 2
214 #define CIPHER_DEL 3
215 #define CIPHER_ORD 4
216 #define CIPHER_SPECIAL 5
217
218 typedef struct cipher_order_st
219 {
220 const SSL_CIPHER *cipher;
221 int active;
222 int dead;
223 struct cipher_order_st *next,*prev;
224 } CIPHER_ORDER;
225
226 static const SSL_CIPHER cipher_aliases[]={
227 /* "ALL" doesn't include eNULL (must be specifically enabled) */
228 {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0},
229 /* "COMPLEMENTOFALL" */
230 {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0},
231
232 /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
233 {0,SSL_TXT_CMPDEF,0, SSL_kDHE|SSL_kECDHE,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
234
235 /* key exchange aliases
236 * (some of those using only a single bit here combine
237 * multiple key exchange algs according to the RFCs,
238 * e.g. kDHE combines DHE_DSS and DHE_RSA) */
239 {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0},
240
241 {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0},
242 {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0},
243 {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0},
244 {0,SSL_TXT_kEDH,0, SSL_kDHE, 0,0,0,0,0,0,0,0},
245 {0,SSL_TXT_kDHE,0, SSL_kDHE, 0,0,0,0,0,0,0,0},
246 {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kDHE,0,0,0,0,0,0,0,0},
247
248 {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0},
249
250 {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0},
251 {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0},
252 {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
253 {0,SSL_TXT_kEECDH,0, SSL_kECDHE,0,0,0,0,0,0,0,0},
254 {0,SSL_TXT_kECDHE,0, SSL_kECDHE,0,0,0,0,0,0,0,0},
255 {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kECDHE,0,0,0,0,0,0,0,0},
256
257 {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0},
258 {0,SSL_TXT_kSRP,0, SSL_kSRP, 0,0,0,0,0,0,0,0},
259 {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
260
261 /* server authentication aliases */
262 {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0},
263 {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
264 {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
265 {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0},
266 {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0},
267 {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
268 {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0},
269 {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0},
270 {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0},
271 {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0},
272 {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
273 {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
274 {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
275 {0,SSL_TXT_aSRP,0, 0,SSL_aSRP, 0,0,0,0,0,0,0},
276
277 /* aliases combining key exchange and server authentication */
278 {0,SSL_TXT_EDH,0, SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
279 {0,SSL_TXT_DHE,0, SSL_kDHE,~SSL_aNULL,0,0,0,0,0,0,0},
280 {0,SSL_TXT_EECDH,0, SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
281 {0,SSL_TXT_ECDHE,0, SSL_kECDHE,~SSL_aNULL,0,0,0,0,0,0,0},
282 {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
283 {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
284 {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
285 {0,SSL_TXT_ADH,0, SSL_kDHE,SSL_aNULL,0,0,0,0,0,0,0},
286 {0,SSL_TXT_AECDH,0, SSL_kECDHE,SSL_aNULL,0,0,0,0,0,0,0},
287 {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
288 {0,SSL_TXT_SRP,0, SSL_kSRP,0,0,0,0,0,0,0,0},
289
290
291 /* symmetric encryption aliases */
292 {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0},
293 {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0},
294 {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0},
295 {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0},
296 {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0},
297 {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0},
298 {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
299 {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
300 {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
301 {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0},
302 {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
303 {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
304 {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
305 {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
306
307 /* MAC aliases */
308 {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0},
309 {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
310 {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
311 {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0},
312 {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0},
313 {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0},
314 {0,SSL_TXT_SHA384,0, 0,0,0,SSL_SHA384, 0,0,0,0,0},
315
316 /* protocol version aliases */
317 {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0},
318 {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0},
319 {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0},
320 {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
321
322 /* export flag */
323 {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
324 {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
325
326 /* strength classes */
327 {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0},
328 {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0},
329 {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0},
330 {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0},
331 {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0},
332 /* FIPS 140-2 approved ciphersuite */
333 {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0},
334
335 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
336 {0,SSL3_TXT_EDH_DSS_DES_40_CBC_SHA,0,
337 SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
338 {0,SSL3_TXT_EDH_DSS_DES_64_CBC_SHA,0,
339 SSL_kDHE,SSL_aDSS,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
340 {0,SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA,0,
341 SSL_kDHE,SSL_aDSS,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
342 {0,SSL3_TXT_EDH_RSA_DES_40_CBC_SHA,0,
343 SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_EXPORT|SSL_EXP40,0,0,0,},
344 {0,SSL3_TXT_EDH_RSA_DES_64_CBC_SHA,0,
345 SSL_kDHE,SSL_aRSA,SSL_DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_LOW,0,0,0,},
346 {0,SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA,0,
347 SSL_kDHE,SSL_aRSA,SSL_3DES,SSL_SHA1,SSL_SSLV3,SSL_NOT_EXP|SSL_HIGH|SSL_FIPS,0,0,0,},
348
349 };
350 /* Search for public key algorithm with given name and
351 * return its pkey_id if it is available. Otherwise return 0
352 */
353 #ifdef OPENSSL_NO_ENGINE
354
355 static int get_optional_pkey_id(const char *pkey_name)
356 {
357 const EVP_PKEY_ASN1_METHOD *ameth;
358 int pkey_id=0;
359 ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
360 if (ameth)
361 {
362 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
363 }
364 return pkey_id;
365 }
366
367 #else
368
369 static int get_optional_pkey_id(const char *pkey_name)
370 {
371 const EVP_PKEY_ASN1_METHOD *ameth;
372 ENGINE *tmpeng = NULL;
373 int pkey_id=0;
374 ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
375 if (ameth)
376 {
377 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
378 }
379 if (tmpeng) ENGINE_finish(tmpeng);
380 return pkey_id;
381 }
382
383 #endif
384
385 void ssl_load_ciphers(void)
386 {
387 ssl_cipher_methods[SSL_ENC_DES_IDX]=
388 EVP_get_cipherbyname(SN_des_cbc);
389 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
390 EVP_get_cipherbyname(SN_des_ede3_cbc);
391 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
392 EVP_get_cipherbyname(SN_rc4);
393 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
394 EVP_get_cipherbyname(SN_rc2_cbc);
395 #ifndef OPENSSL_NO_IDEA
396 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
397 EVP_get_cipherbyname(SN_idea_cbc);
398 #else
399 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
400 #endif
401 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
402 EVP_get_cipherbyname(SN_aes_128_cbc);
403 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
404 EVP_get_cipherbyname(SN_aes_256_cbc);
405 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
406 EVP_get_cipherbyname(SN_camellia_128_cbc);
407 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
408 EVP_get_cipherbyname(SN_camellia_256_cbc);
409 ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
410 EVP_get_cipherbyname(SN_gost89_cnt);
411 ssl_cipher_methods[SSL_ENC_SEED_IDX]=
412 EVP_get_cipherbyname(SN_seed_cbc);
413
414 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
415 EVP_get_cipherbyname(SN_aes_128_gcm);
416 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
417 EVP_get_cipherbyname(SN_aes_256_gcm);
418
419 ssl_digest_methods[SSL_MD_MD5_IDX]=
420 EVP_get_digestbyname(SN_md5);
421 ssl_mac_secret_size[SSL_MD_MD5_IDX]=
422 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
423 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
424 ssl_digest_methods[SSL_MD_SHA1_IDX]=
425 EVP_get_digestbyname(SN_sha1);
426 ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
427 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
428 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
429 ssl_digest_methods[SSL_MD_GOST94_IDX]=
430 EVP_get_digestbyname(SN_id_GostR3411_94);
431 if (ssl_digest_methods[SSL_MD_GOST94_IDX])
432 {
433 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
434 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
435 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
436 }
437 ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
438 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
439 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
440 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
441 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
442 }
443
444 ssl_digest_methods[SSL_MD_SHA256_IDX]=
445 EVP_get_digestbyname(SN_sha256);
446 ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
447 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
448 ssl_digest_methods[SSL_MD_SHA384_IDX]=
449 EVP_get_digestbyname(SN_sha384);
450 ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
451 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
452 }
453 #ifndef OPENSSL_NO_COMP
454
455 static int sk_comp_cmp(const SSL_COMP * const *a,
456 const SSL_COMP * const *b)
457 {
458 return((*a)->id-(*b)->id);
459 }
460
461 static void load_builtin_compressions(void)
462 {
463 int got_write_lock = 0;
464
465 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
466 if (ssl_comp_methods == NULL)
467 {
468 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
469 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
470 got_write_lock = 1;
471
472 if (ssl_comp_methods == NULL)
473 {
474 SSL_COMP *comp = NULL;
475
476 MemCheck_off();
477 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
478 if (ssl_comp_methods != NULL)
479 {
480 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
481 if (comp != NULL)
482 {
483 comp->method=COMP_zlib();
484 if (comp->method
485 && comp->method->type == NID_undef)
486 OPENSSL_free(comp);
487 else
488 {
489 comp->id=SSL_COMP_ZLIB_IDX;
490 comp->name=comp->method->name;
491 sk_SSL_COMP_push(ssl_comp_methods,comp);
492 }
493 }
494 sk_SSL_COMP_sort(ssl_comp_methods);
495 }
496 MemCheck_on();
497 }
498 }
499
500 if (got_write_lock)
501 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
502 else
503 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
504 }
505 #endif
506
507 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
508 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size,SSL_COMP **comp, int use_etm)
509 {
510 int i;
511 const SSL_CIPHER *c;
512
513 c=s->cipher;
514 if (c == NULL) return(0);
515 if (comp != NULL)
516 {
517 SSL_COMP ctmp;
518 #ifndef OPENSSL_NO_COMP
519 load_builtin_compressions();
520 #endif
521
522 *comp=NULL;
523 ctmp.id=s->compress_meth;
524 if (ssl_comp_methods != NULL)
525 {
526 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
527 if (i >= 0)
528 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
529 else
530 *comp=NULL;
531 }
532 }
533
534 if ((enc == NULL) || (md == NULL)) return(0);
535
536 switch (c->algorithm_enc)
537 {
538 case SSL_DES:
539 i=SSL_ENC_DES_IDX;
540 break;
541 case SSL_3DES:
542 i=SSL_ENC_3DES_IDX;
543 break;
544 case SSL_RC4:
545 i=SSL_ENC_RC4_IDX;
546 break;
547 case SSL_RC2:
548 i=SSL_ENC_RC2_IDX;
549 break;
550 case SSL_IDEA:
551 i=SSL_ENC_IDEA_IDX;
552 break;
553 case SSL_eNULL:
554 i=SSL_ENC_NULL_IDX;
555 break;
556 case SSL_AES128:
557 i=SSL_ENC_AES128_IDX;
558 break;
559 case SSL_AES256:
560 i=SSL_ENC_AES256_IDX;
561 break;
562 case SSL_CAMELLIA128:
563 i=SSL_ENC_CAMELLIA128_IDX;
564 break;
565 case SSL_CAMELLIA256:
566 i=SSL_ENC_CAMELLIA256_IDX;
567 break;
568 case SSL_eGOST2814789CNT:
569 i=SSL_ENC_GOST89_IDX;
570 break;
571 case SSL_SEED:
572 i=SSL_ENC_SEED_IDX;
573 break;
574 case SSL_AES128GCM:
575 i=SSL_ENC_AES128GCM_IDX;
576 break;
577 case SSL_AES256GCM:
578 i=SSL_ENC_AES256GCM_IDX;
579 break;
580 default:
581 i= -1;
582 break;
583 }
584
585 if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
586 *enc=NULL;
587 else
588 {
589 if (i == SSL_ENC_NULL_IDX)
590 *enc=EVP_enc_null();
591 else
592 *enc=ssl_cipher_methods[i];
593 }
594
595 switch (c->algorithm_mac)
596 {
597 case SSL_MD5:
598 i=SSL_MD_MD5_IDX;
599 break;
600 case SSL_SHA1:
601 i=SSL_MD_SHA1_IDX;
602 break;
603 case SSL_SHA256:
604 i=SSL_MD_SHA256_IDX;
605 break;
606 case SSL_SHA384:
607 i=SSL_MD_SHA384_IDX;
608 break;
609 case SSL_GOST94:
610 i = SSL_MD_GOST94_IDX;
611 break;
612 case SSL_GOST89MAC:
613 i = SSL_MD_GOST89MAC_IDX;
614 break;
615 default:
616 i= -1;
617 break;
618 }
619 if ((i < 0) || (i >= SSL_MD_NUM_IDX))
620 {
621 *md=NULL;
622 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
623 if (mac_secret_size!=NULL) *mac_secret_size = 0;
624 if (c->algorithm_mac == SSL_AEAD)
625 mac_pkey_type = NULL;
626 }
627 else
628 {
629 *md=ssl_digest_methods[i];
630 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
631 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
632 }
633
634 if ((*enc != NULL) &&
635 (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
636 (!mac_pkey_type||*mac_pkey_type != NID_undef))
637 {
638 const EVP_CIPHER *evp;
639
640 if (use_etm)
641 return 1;
642
643 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
644 s->ssl_version < TLS1_VERSION)
645 return 1;
646
647 #ifdef OPENSSL_FIPS
648 if (FIPS_mode())
649 return 1;
650 #endif
651
652 if (c->algorithm_enc == SSL_RC4 &&
653 c->algorithm_mac == SSL_MD5 &&
654 (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
655 *enc = evp, *md = NULL;
656 else if (c->algorithm_enc == SSL_AES128 &&
657 c->algorithm_mac == SSL_SHA1 &&
658 (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
659 *enc = evp, *md = NULL;
660 else if (c->algorithm_enc == SSL_AES256 &&
661 c->algorithm_mac == SSL_SHA1 &&
662 (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
663 *enc = evp, *md = NULL;
664 else if (c->algorithm_enc == SSL_AES128 &&
665 c->algorithm_mac == SSL_SHA256 &&
666 (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
667 *enc = evp, *md = NULL;
668 else if (c->algorithm_enc == SSL_AES256 &&
669 c->algorithm_mac == SSL_SHA256 &&
670 (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
671 *enc = evp, *md = NULL;
672 return(1);
673 }
674 else
675 return(0);
676 }
677
678 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
679 {
680 if (idx <0||idx>=SSL_MD_NUM_IDX)
681 {
682 return 0;
683 }
684 *mask = ssl_handshake_digest_flag[idx];
685 if (*mask)
686 *md = ssl_digest_methods[idx];
687 else
688 *md = NULL;
689 return 1;
690 }
691
692 #define ITEM_SEP(a) \
693 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
694
695 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
696 CIPHER_ORDER **tail)
697 {
698 if (curr == *tail) return;
699 if (curr == *head)
700 *head=curr->next;
701 if (curr->prev != NULL)
702 curr->prev->next=curr->next;
703 if (curr->next != NULL)
704 curr->next->prev=curr->prev;
705 (*tail)->next=curr;
706 curr->prev= *tail;
707 curr->next=NULL;
708 *tail=curr;
709 }
710
711 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
712 CIPHER_ORDER **tail)
713 {
714 if (curr == *head) return;
715 if (curr == *tail)
716 *tail=curr->prev;
717 if (curr->next != NULL)
718 curr->next->prev=curr->prev;
719 if (curr->prev != NULL)
720 curr->prev->next=curr->next;
721 (*head)->prev=curr;
722 curr->next= *head;
723 curr->prev=NULL;
724 *head=curr;
725 }
726
727 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
728 {
729 *mkey = 0;
730 *auth = 0;
731 *enc = 0;
732 *mac = 0;
733 *ssl = 0;
734
735 #ifdef OPENSSL_NO_RSA
736 *mkey |= SSL_kRSA;
737 *auth |= SSL_aRSA;
738 #endif
739 #ifdef OPENSSL_NO_DSA
740 *auth |= SSL_aDSS;
741 #endif
742 #ifdef OPENSSL_NO_DH
743 *mkey |= SSL_kDHr|SSL_kDHd|SSL_kDHE;
744 *auth |= SSL_aDH;
745 #endif
746 #ifdef OPENSSL_NO_KRB5
747 *mkey |= SSL_kKRB5;
748 *auth |= SSL_aKRB5;
749 #endif
750 #ifdef OPENSSL_NO_ECDSA
751 *auth |= SSL_aECDSA;
752 #endif
753 #ifdef OPENSSL_NO_ECDH
754 *mkey |= SSL_kECDHe|SSL_kECDHr;
755 *auth |= SSL_aECDH;
756 #endif
757 #ifdef OPENSSL_NO_PSK
758 *mkey |= SSL_kPSK;
759 *auth |= SSL_aPSK;
760 #endif
761 #ifdef OPENSSL_NO_SRP
762 *mkey |= SSL_kSRP;
763 #endif
764 /* Check for presence of GOST 34.10 algorithms, and if they
765 * do not present, disable appropriate auth and key exchange */
766 if (!get_optional_pkey_id("gost94")) {
767 *auth |= SSL_aGOST94;
768 }
769 if (!get_optional_pkey_id("gost2001")) {
770 *auth |= SSL_aGOST01;
771 }
772 /* Disable GOST key exchange if no GOST signature algs are available * */
773 if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
774 *mkey |= SSL_kGOST;
775 }
776 #ifdef SSL_FORBID_ENULL
777 *enc |= SSL_eNULL;
778 #endif
779
780
781
782 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
783 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
784 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
785 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
786 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
787 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
788 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
789 *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
790 *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
791 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
792 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
793 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
794 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
795
796 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
797 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
798 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
799 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
800 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
801 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
802
803 }
804
805 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
806 int num_of_ciphers,
807 unsigned long disabled_mkey, unsigned long disabled_auth,
808 unsigned long disabled_enc, unsigned long disabled_mac,
809 unsigned long disabled_ssl,
810 CIPHER_ORDER *co_list,
811 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
812 {
813 int i, co_list_num;
814 const SSL_CIPHER *c;
815
816 /*
817 * We have num_of_ciphers descriptions compiled in, depending on the
818 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
819 * These will later be sorted in a linked list with at most num
820 * entries.
821 */
822
823 /* Get the initial list of ciphers */
824 co_list_num = 0; /* actual count of ciphers */
825 for (i = 0; i < num_of_ciphers; i++)
826 {
827 c = ssl_method->get_cipher(i);
828 /* drop those that use any of that is not available */
829 if ((c != NULL) && c->valid &&
830 #ifdef OPENSSL_FIPS
831 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
832 #endif
833 !(c->algorithm_mkey & disabled_mkey) &&
834 !(c->algorithm_auth & disabled_auth) &&
835 !(c->algorithm_enc & disabled_enc) &&
836 !(c->algorithm_mac & disabled_mac) &&
837 !(c->algorithm_ssl & disabled_ssl))
838 {
839 co_list[co_list_num].cipher = c;
840 co_list[co_list_num].next = NULL;
841 co_list[co_list_num].prev = NULL;
842 co_list[co_list_num].active = 0;
843 co_list_num++;
844 #ifdef KSSL_DEBUG
845 printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
846 #endif /* KSSL_DEBUG */
847 /*
848 if (!sk_push(ca_list,(char *)c)) goto err;
849 */
850 }
851 }
852
853 /*
854 * Prepare linked list from list entries
855 */
856 if (co_list_num > 0)
857 {
858 co_list[0].prev = NULL;
859
860 if (co_list_num > 1)
861 {
862 co_list[0].next = &co_list[1];
863
864 for (i = 1; i < co_list_num - 1; i++)
865 {
866 co_list[i].prev = &co_list[i - 1];
867 co_list[i].next = &co_list[i + 1];
868 }
869
870 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
871 }
872
873 co_list[co_list_num - 1].next = NULL;
874
875 *head_p = &co_list[0];
876 *tail_p = &co_list[co_list_num - 1];
877 }
878 }
879
880 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
881 int num_of_group_aliases,
882 unsigned long disabled_mkey, unsigned long disabled_auth,
883 unsigned long disabled_enc, unsigned long disabled_mac,
884 unsigned long disabled_ssl,
885 CIPHER_ORDER *head)
886 {
887 CIPHER_ORDER *ciph_curr;
888 const SSL_CIPHER **ca_curr;
889 int i;
890 unsigned long mask_mkey = ~disabled_mkey;
891 unsigned long mask_auth = ~disabled_auth;
892 unsigned long mask_enc = ~disabled_enc;
893 unsigned long mask_mac = ~disabled_mac;
894 unsigned long mask_ssl = ~disabled_ssl;
895
896 /*
897 * First, add the real ciphers as already collected
898 */
899 ciph_curr = head;
900 ca_curr = ca_list;
901 while (ciph_curr != NULL)
902 {
903 *ca_curr = ciph_curr->cipher;
904 ca_curr++;
905 ciph_curr = ciph_curr->next;
906 }
907
908 /*
909 * Now we add the available ones from the cipher_aliases[] table.
910 * They represent either one or more algorithms, some of which
911 * in any affected category must be supported (set in enabled_mask),
912 * or represent a cipher strength value (will be added in any case because algorithms=0).
913 */
914 for (i = 0; i < num_of_group_aliases; i++)
915 {
916 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
917 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
918 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
919 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
920 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
921
922 if (algorithm_mkey)
923 if ((algorithm_mkey & mask_mkey) == 0)
924 continue;
925
926 if (algorithm_auth)
927 if ((algorithm_auth & mask_auth) == 0)
928 continue;
929
930 if (algorithm_enc)
931 if ((algorithm_enc & mask_enc) == 0)
932 continue;
933
934 if (algorithm_mac)
935 if ((algorithm_mac & mask_mac) == 0)
936 continue;
937
938 if (algorithm_ssl)
939 if ((algorithm_ssl & mask_ssl) == 0)
940 continue;
941
942 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
943 ca_curr++;
944 }
945
946 *ca_curr = NULL; /* end of list */
947 }
948
949 static void ssl_cipher_apply_rule(unsigned long cipher_id,
950 unsigned long alg_mkey, unsigned long alg_auth,
951 unsigned long alg_enc, unsigned long alg_mac,
952 unsigned long alg_ssl,
953 unsigned long algo_strength,
954 int rule, int strength_bits,
955 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
956 {
957 CIPHER_ORDER *head, *tail, *curr, *next, *last;
958 const SSL_CIPHER *cp;
959 int reverse = 0;
960
961 #ifdef CIPHER_DEBUG
962 printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
963 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
964 #endif
965
966 if (rule == CIPHER_DEL)
967 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
968
969 head = *head_p;
970 tail = *tail_p;
971
972 if (reverse)
973 {
974 next = tail;
975 last = head;
976 }
977 else
978 {
979 next = head;
980 last = tail;
981 }
982
983 curr = NULL;
984 for (;;)
985 {
986 if (curr == last) break;
987
988 curr = next;
989
990 if (curr == NULL) break;
991
992 next = reverse ? curr->prev : curr->next;
993
994 cp = curr->cipher;
995
996 /*
997 * Selection criteria is either the value of strength_bits
998 * or the algorithms used.
999 */
1000 if (strength_bits >= 0)
1001 {
1002 if (strength_bits != cp->strength_bits)
1003 continue;
1004 }
1005 else
1006 {
1007 #ifdef CIPHER_DEBUG
1008 printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
1009 #endif
1010 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1011 if (cipher_id && cipher_id != cp->id)
1012 continue;
1013 #endif
1014 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1015 continue;
1016 if (alg_auth && !(alg_auth & cp->algorithm_auth))
1017 continue;
1018 if (alg_enc && !(alg_enc & cp->algorithm_enc))
1019 continue;
1020 if (alg_mac && !(alg_mac & cp->algorithm_mac))
1021 continue;
1022 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1023 continue;
1024 if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1025 continue;
1026 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1027 continue;
1028 }
1029
1030 #ifdef CIPHER_DEBUG
1031 printf("Action = %d\n", rule);
1032 #endif
1033
1034 /* add the cipher if it has not been added yet. */
1035 if (rule == CIPHER_ADD)
1036 {
1037 /* reverse == 0 */
1038 if (!curr->active)
1039 {
1040 ll_append_tail(&head, curr, &tail);
1041 curr->active = 1;
1042 }
1043 }
1044 /* Move the added cipher to this location */
1045 else if (rule == CIPHER_ORD)
1046 {
1047 /* reverse == 0 */
1048 if (curr->active)
1049 {
1050 ll_append_tail(&head, curr, &tail);
1051 }
1052 }
1053 else if (rule == CIPHER_DEL)
1054 {
1055 /* reverse == 1 */
1056 if (curr->active)
1057 {
1058 /* most recently deleted ciphersuites get best positions
1059 * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1060 * works in reverse to maintain the order) */
1061 ll_append_head(&head, curr, &tail);
1062 curr->active = 0;
1063 }
1064 }
1065 else if (rule == CIPHER_KILL)
1066 {
1067 /* reverse == 0 */
1068 if (head == curr)
1069 head = curr->next;
1070 else
1071 curr->prev->next = curr->next;
1072 if (tail == curr)
1073 tail = curr->prev;
1074 curr->active = 0;
1075 if (curr->next != NULL)
1076 curr->next->prev = curr->prev;
1077 if (curr->prev != NULL)
1078 curr->prev->next = curr->next;
1079 curr->next = NULL;
1080 curr->prev = NULL;
1081 }
1082 }
1083
1084 *head_p = head;
1085 *tail_p = tail;
1086 }
1087
1088 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1089 CIPHER_ORDER **tail_p)
1090 {
1091 int max_strength_bits, i, *number_uses;
1092 CIPHER_ORDER *curr;
1093
1094 /*
1095 * This routine sorts the ciphers with descending strength. The sorting
1096 * must keep the pre-sorted sequence, so we apply the normal sorting
1097 * routine as '+' movement to the end of the list.
1098 */
1099 max_strength_bits = 0;
1100 curr = *head_p;
1101 while (curr != NULL)
1102 {
1103 if (curr->active &&
1104 (curr->cipher->strength_bits > max_strength_bits))
1105 max_strength_bits = curr->cipher->strength_bits;
1106 curr = curr->next;
1107 }
1108
1109 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1110 if (!number_uses)
1111 {
1112 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1113 return(0);
1114 }
1115 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1116
1117 /*
1118 * Now find the strength_bits values actually used
1119 */
1120 curr = *head_p;
1121 while (curr != NULL)
1122 {
1123 if (curr->active)
1124 number_uses[curr->cipher->strength_bits]++;
1125 curr = curr->next;
1126 }
1127 /*
1128 * Go through the list of used strength_bits values in descending
1129 * order.
1130 */
1131 for (i = max_strength_bits; i >= 0; i--)
1132 if (number_uses[i] > 0)
1133 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1134
1135 OPENSSL_free(number_uses);
1136 return(1);
1137 }
1138
1139 static int ssl_cipher_process_rulestr(const char *rule_str,
1140 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1141 const SSL_CIPHER **ca_list, CERT *c)
1142 {
1143 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1144 const char *l, *buf;
1145 int j, multi, found, rule, retval, ok, buflen;
1146 unsigned long cipher_id = 0;
1147 char ch;
1148
1149 retval = 1;
1150 l = rule_str;
1151 for (;;)
1152 {
1153 ch = *l;
1154
1155 if (ch == '\0')
1156 break; /* done */
1157 if (ch == '-')
1158 { rule = CIPHER_DEL; l++; }
1159 else if (ch == '+')
1160 { rule = CIPHER_ORD; l++; }
1161 else if (ch == '!')
1162 { rule = CIPHER_KILL; l++; }
1163 else if (ch == '@')
1164 { rule = CIPHER_SPECIAL; l++; }
1165 else
1166 { rule = CIPHER_ADD; }
1167
1168 if (ITEM_SEP(ch))
1169 {
1170 l++;
1171 continue;
1172 }
1173
1174 alg_mkey = 0;
1175 alg_auth = 0;
1176 alg_enc = 0;
1177 alg_mac = 0;
1178 alg_ssl = 0;
1179 algo_strength = 0;
1180
1181 for (;;)
1182 {
1183 ch = *l;
1184 buf = l;
1185 buflen = 0;
1186 #ifndef CHARSET_EBCDIC
1187 while ( ((ch >= 'A') && (ch <= 'Z')) ||
1188 ((ch >= '0') && (ch <= '9')) ||
1189 ((ch >= 'a') && (ch <= 'z')) ||
1190 (ch == '-') || (ch == '.') ||
1191 (ch == '='))
1192 #else
1193 while ( isalnum(ch) || (ch == '-') || (ch == '.') ||
1194 (ch == '='))
1195 #endif
1196 {
1197 ch = *(++l);
1198 buflen++;
1199 }
1200
1201 if (buflen == 0)
1202 {
1203 /*
1204 * We hit something we cannot deal with,
1205 * it is no command or separator nor
1206 * alphanumeric, so we call this an error.
1207 */
1208 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1209 SSL_R_INVALID_COMMAND);
1210 retval = found = 0;
1211 l++;
1212 break;
1213 }
1214
1215 if (rule == CIPHER_SPECIAL)
1216 {
1217 found = 0; /* unused -- avoid compiler warning */
1218 break; /* special treatment */
1219 }
1220
1221 /* check for multi-part specification */
1222 if (ch == '+')
1223 {
1224 multi=1;
1225 l++;
1226 }
1227 else
1228 multi=0;
1229
1230 /*
1231 * Now search for the cipher alias in the ca_list. Be careful
1232 * with the strncmp, because the "buflen" limitation
1233 * will make the rule "ADH:SOME" and the cipher
1234 * "ADH-MY-CIPHER" look like a match for buflen=3.
1235 * So additionally check whether the cipher name found
1236 * has the correct length. We can save a strlen() call:
1237 * just checking for the '\0' at the right place is
1238 * sufficient, we have to strncmp() anyway. (We cannot
1239 * use strcmp(), because buf is not '\0' terminated.)
1240 */
1241 j = found = 0;
1242 cipher_id = 0;
1243 while (ca_list[j])
1244 {
1245 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1246 (ca_list[j]->name[buflen] == '\0'))
1247 {
1248 found = 1;
1249 break;
1250 }
1251 else
1252 j++;
1253 }
1254
1255 if (!found)
1256 break; /* ignore this entry */
1257
1258 if (ca_list[j]->algorithm_mkey)
1259 {
1260 if (alg_mkey)
1261 {
1262 alg_mkey &= ca_list[j]->algorithm_mkey;
1263 if (!alg_mkey) { found = 0; break; }
1264 }
1265 else
1266 alg_mkey = ca_list[j]->algorithm_mkey;
1267 }
1268
1269 if (ca_list[j]->algorithm_auth)
1270 {
1271 if (alg_auth)
1272 {
1273 alg_auth &= ca_list[j]->algorithm_auth;
1274 if (!alg_auth) { found = 0; break; }
1275 }
1276 else
1277 alg_auth = ca_list[j]->algorithm_auth;
1278 }
1279
1280 if (ca_list[j]->algorithm_enc)
1281 {
1282 if (alg_enc)
1283 {
1284 alg_enc &= ca_list[j]->algorithm_enc;
1285 if (!alg_enc) { found = 0; break; }
1286 }
1287 else
1288 alg_enc = ca_list[j]->algorithm_enc;
1289 }
1290
1291 if (ca_list[j]->algorithm_mac)
1292 {
1293 if (alg_mac)
1294 {
1295 alg_mac &= ca_list[j]->algorithm_mac;
1296 if (!alg_mac) { found = 0; break; }
1297 }
1298 else
1299 alg_mac = ca_list[j]->algorithm_mac;
1300 }
1301
1302 if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1303 {
1304 if (algo_strength & SSL_EXP_MASK)
1305 {
1306 algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1307 if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1308 }
1309 else
1310 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1311 }
1312
1313 if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1314 {
1315 if (algo_strength & SSL_STRONG_MASK)
1316 {
1317 algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1318 if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1319 }
1320 else
1321 algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1322 }
1323
1324 if (ca_list[j]->valid)
1325 {
1326 /* explicit ciphersuite found; its protocol version
1327 * does not become part of the search pattern!*/
1328
1329 cipher_id = ca_list[j]->id;
1330 }
1331 else
1332 {
1333 /* not an explicit ciphersuite; only in this case, the
1334 * protocol version is considered part of the search pattern */
1335
1336 if (ca_list[j]->algorithm_ssl)
1337 {
1338 if (alg_ssl)
1339 {
1340 alg_ssl &= ca_list[j]->algorithm_ssl;
1341 if (!alg_ssl) { found = 0; break; }
1342 }
1343 else
1344 alg_ssl = ca_list[j]->algorithm_ssl;
1345 }
1346 }
1347
1348 if (!multi) break;
1349 }
1350
1351 /*
1352 * Ok, we have the rule, now apply it
1353 */
1354 if (rule == CIPHER_SPECIAL)
1355 { /* special command */
1356 ok = 0;
1357 if ((buflen == 8) &&
1358 !strncmp(buf, "STRENGTH", 8))
1359 ok = ssl_cipher_strength_sort(head_p, tail_p);
1360 else if (buflen == 10 && !strncmp(buf, "SECLEVEL=", 9))
1361 {
1362 int level = buf[9] - '0';
1363 if (level < 0 || level > 5)
1364 {
1365 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1366 SSL_R_INVALID_COMMAND);
1367 }
1368 else
1369 {
1370 c->sec_level = level;
1371 ok = 1;
1372 }
1373 }
1374 else
1375 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1376 SSL_R_INVALID_COMMAND);
1377 if (ok == 0)
1378 retval = 0;
1379 /*
1380 * We do not support any "multi" options
1381 * together with "@", so throw away the
1382 * rest of the command, if any left, until
1383 * end or ':' is found.
1384 */
1385 while ((*l != '\0') && !ITEM_SEP(*l))
1386 l++;
1387 }
1388 else if (found)
1389 {
1390 ssl_cipher_apply_rule(cipher_id,
1391 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1392 rule, -1, head_p, tail_p);
1393 }
1394 else
1395 {
1396 while ((*l != '\0') && !ITEM_SEP(*l))
1397 l++;
1398 }
1399 if (*l == '\0') break; /* done */
1400 }
1401
1402 return(retval);
1403 }
1404 #ifndef OPENSSL_NO_EC
1405 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1406 const char **prule_str)
1407 {
1408 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1409 if (!strcmp(*prule_str, "SUITEB128"))
1410 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1411 else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1412 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1413 else if (!strcmp(*prule_str, "SUITEB128C2"))
1414 {
1415 suiteb_comb2 = 1;
1416 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1417 }
1418 else if (!strcmp(*prule_str, "SUITEB192"))
1419 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1420
1421 if (suiteb_flags)
1422 {
1423 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1424 c->cert_flags |= suiteb_flags;
1425 }
1426 else
1427 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1428
1429 if (!suiteb_flags)
1430 return 1;
1431 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1432
1433 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1434 {
1435 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1436 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1437 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1438 else
1439 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1440 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1441 return 0;
1442 }
1443
1444 switch(suiteb_flags)
1445 {
1446 case SSL_CERT_FLAG_SUITEB_128_LOS:
1447 if (suiteb_comb2)
1448 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1449 else
1450 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1451 break;
1452 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1453 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1454 break;
1455 case SSL_CERT_FLAG_SUITEB_192_LOS:
1456 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1457 break;
1458 }
1459 /* Set auto ECDH parameter determination */
1460 c->ecdh_tmp_auto = 1;
1461 return 1;
1462 }
1463 #endif
1464
1465 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1466 STACK_OF(SSL_CIPHER) **cipher_list,
1467 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1468 const char *rule_str, CERT *c)
1469 {
1470 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1471 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1472 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1473 const char *rule_p;
1474 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1475 const SSL_CIPHER **ca_list = NULL;
1476
1477 /*
1478 * Return with error if nothing to do.
1479 */
1480 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1481 return NULL;
1482 #ifndef OPENSSL_NO_EC
1483 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1484 return NULL;
1485 #endif
1486
1487 /*
1488 * To reduce the work to do we only want to process the compiled
1489 * in algorithms, so we first get the mask of disabled ciphers.
1490 */
1491 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1492
1493 /*
1494 * Now we have to collect the available ciphers from the compiled
1495 * in ciphers. We cannot get more than the number compiled in, so
1496 * it is used for allocation.
1497 */
1498 num_of_ciphers = ssl_method->num_ciphers();
1499 #ifdef KSSL_DEBUG
1500 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1501 #endif /* KSSL_DEBUG */
1502 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1503 if (co_list == NULL)
1504 {
1505 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1506 return(NULL); /* Failure */
1507 }
1508
1509 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1510 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1511 co_list, &head, &tail);
1512
1513
1514 /* Now arrange all ciphers by preference: */
1515
1516 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1517 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1518 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1519
1520 /* AES is our preferred symmetric cipher */
1521 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1522
1523 /* Temporarily enable everything else for sorting */
1524 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1525
1526 /* Low priority for MD5 */
1527 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1528
1529 /* Move anonymous ciphers to the end. Usually, these will remain disabled.
1530 * (For applications that allow them, they aren't too bad, but we prefer
1531 * authenticated ciphers.) */
1532 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1533
1534 /* Move ciphers without forward secrecy to the end */
1535 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1536 /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1537 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1538 ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1539 ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1540
1541 /* RC4 is sort-of broken -- move the the end */
1542 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1543
1544 /* Now sort by symmetric encryption strength. The above ordering remains
1545 * in force within each class */
1546 if (!ssl_cipher_strength_sort(&head, &tail))
1547 {
1548 OPENSSL_free(co_list);
1549 return NULL;
1550 }
1551
1552 /* Now disable everything (maintaining the ordering!) */
1553 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1554
1555
1556 /*
1557 * We also need cipher aliases for selecting based on the rule_str.
1558 * There might be two types of entries in the rule_str: 1) names
1559 * of ciphers themselves 2) aliases for groups of ciphers.
1560 * For 1) we need the available ciphers and for 2) the cipher
1561 * groups of cipher_aliases added together in one list (otherwise
1562 * we would be happy with just the cipher_aliases table).
1563 */
1564 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1565 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1566 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1567 if (ca_list == NULL)
1568 {
1569 OPENSSL_free(co_list);
1570 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1571 return(NULL); /* Failure */
1572 }
1573 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1574 disabled_mkey, disabled_auth, disabled_enc,
1575 disabled_mac, disabled_ssl, head);
1576
1577 /*
1578 * If the rule_string begins with DEFAULT, apply the default rule
1579 * before using the (possibly available) additional rules.
1580 */
1581 ok = 1;
1582 rule_p = rule_str;
1583 if (strncmp(rule_str,"DEFAULT",7) == 0)
1584 {
1585 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1586 &head, &tail, ca_list, c);
1587 rule_p += 7;
1588 if (*rule_p == ':')
1589 rule_p++;
1590 }
1591
1592 if (ok && (strlen(rule_p) > 0))
1593 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1594
1595 OPENSSL_free((void *)ca_list); /* Not needed anymore */
1596
1597 if (!ok)
1598 { /* Rule processing failure */
1599 OPENSSL_free(co_list);
1600 return(NULL);
1601 }
1602
1603 /*
1604 * Allocate new "cipherstack" for the result, return with error
1605 * if we cannot get one.
1606 */
1607 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1608 {
1609 OPENSSL_free(co_list);
1610 return(NULL);
1611 }
1612
1613 /*
1614 * The cipher selection for the list is done. The ciphers are added
1615 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1616 */
1617 for (curr = head; curr != NULL; curr = curr->next)
1618 {
1619 #ifdef OPENSSL_FIPS
1620 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1621 #else
1622 if (curr->active)
1623 #endif
1624 {
1625 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1626 #ifdef CIPHER_DEBUG
1627 printf("<%s>\n",curr->cipher->name);
1628 #endif
1629 }
1630 }
1631 OPENSSL_free(co_list); /* Not needed any longer */
1632
1633 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1634 if (tmp_cipher_list == NULL)
1635 {
1636 sk_SSL_CIPHER_free(cipherstack);
1637 return NULL;
1638 }
1639 if (*cipher_list != NULL)
1640 sk_SSL_CIPHER_free(*cipher_list);
1641 *cipher_list = cipherstack;
1642 if (*cipher_list_by_id != NULL)
1643 sk_SSL_CIPHER_free(*cipher_list_by_id);
1644 *cipher_list_by_id = tmp_cipher_list;
1645 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1646
1647 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1648 return(cipherstack);
1649 }
1650
1651 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1652 {
1653 int is_export,pkl,kl;
1654 const char *ver,*exp_str;
1655 const char *kx,*au,*enc,*mac;
1656 unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1657 #ifdef KSSL_DEBUG
1658 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1659 #else
1660 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1661 #endif /* KSSL_DEBUG */
1662
1663 alg_mkey = cipher->algorithm_mkey;
1664 alg_auth = cipher->algorithm_auth;
1665 alg_enc = cipher->algorithm_enc;
1666 alg_mac = cipher->algorithm_mac;
1667 alg_ssl = cipher->algorithm_ssl;
1668
1669 alg2=cipher->algorithm2;
1670
1671 is_export=SSL_C_IS_EXPORT(cipher);
1672 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1673 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1674 exp_str=is_export?" export":"";
1675
1676 if (alg_ssl & SSL_SSLV2)
1677 ver="SSLv2";
1678 else if (alg_ssl & SSL_SSLV3)
1679 ver="SSLv3";
1680 else if (alg_ssl & SSL_TLSV1_2)
1681 ver="TLSv1.2";
1682 else
1683 ver="unknown";
1684
1685 switch (alg_mkey)
1686 {
1687 case SSL_kRSA:
1688 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1689 break;
1690 case SSL_kDHr:
1691 kx="DH/RSA";
1692 break;
1693 case SSL_kDHd:
1694 kx="DH/DSS";
1695 break;
1696 case SSL_kKRB5:
1697 kx="KRB5";
1698 break;
1699 case SSL_kDHE:
1700 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1701 break;
1702 case SSL_kECDHr:
1703 kx="ECDH/RSA";
1704 break;
1705 case SSL_kECDHe:
1706 kx="ECDH/ECDSA";
1707 break;
1708 case SSL_kECDHE:
1709 kx="ECDH";
1710 break;
1711 case SSL_kPSK:
1712 kx="PSK";
1713 break;
1714 case SSL_kSRP:
1715 kx="SRP";
1716 break;
1717 case SSL_kGOST:
1718 kx="GOST";
1719 break;
1720 default:
1721 kx="unknown";
1722 }
1723
1724 switch (alg_auth)
1725 {
1726 case SSL_aRSA:
1727 au="RSA";
1728 break;
1729 case SSL_aDSS:
1730 au="DSS";
1731 break;
1732 case SSL_aDH:
1733 au="DH";
1734 break;
1735 case SSL_aKRB5:
1736 au="KRB5";
1737 break;
1738 case SSL_aECDH:
1739 au="ECDH";
1740 break;
1741 case SSL_aNULL:
1742 au="None";
1743 break;
1744 case SSL_aECDSA:
1745 au="ECDSA";
1746 break;
1747 case SSL_aPSK:
1748 au="PSK";
1749 break;
1750 case SSL_aSRP:
1751 au="SRP";
1752 break;
1753 case SSL_aGOST94:
1754 au="GOST94";
1755 break;
1756 case SSL_aGOST01:
1757 au="GOST01";
1758 break;
1759 default:
1760 au="unknown";
1761 break;
1762 }
1763
1764 switch (alg_enc)
1765 {
1766 case SSL_DES:
1767 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1768 break;
1769 case SSL_3DES:
1770 enc="3DES(168)";
1771 break;
1772 case SSL_RC4:
1773 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1774 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1775 break;
1776 case SSL_RC2:
1777 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1778 break;
1779 case SSL_IDEA:
1780 enc="IDEA(128)";
1781 break;
1782 case SSL_eNULL:
1783 enc="None";
1784 break;
1785 case SSL_AES128:
1786 enc="AES(128)";
1787 break;
1788 case SSL_AES256:
1789 enc="AES(256)";
1790 break;
1791 case SSL_AES128GCM:
1792 enc="AESGCM(128)";
1793 break;
1794 case SSL_AES256GCM:
1795 enc="AESGCM(256)";
1796 break;
1797 case SSL_CAMELLIA128:
1798 enc="Camellia(128)";
1799 break;
1800 case SSL_CAMELLIA256:
1801 enc="Camellia(256)";
1802 break;
1803 case SSL_SEED:
1804 enc="SEED(128)";
1805 break;
1806 case SSL_eGOST2814789CNT:
1807 enc="GOST89(256)";
1808 break;
1809 default:
1810 enc="unknown";
1811 break;
1812 }
1813
1814 switch (alg_mac)
1815 {
1816 case SSL_MD5:
1817 mac="MD5";
1818 break;
1819 case SSL_SHA1:
1820 mac="SHA1";
1821 break;
1822 case SSL_SHA256:
1823 mac="SHA256";
1824 break;
1825 case SSL_SHA384:
1826 mac="SHA384";
1827 break;
1828 case SSL_AEAD:
1829 mac="AEAD";
1830 break;
1831 case SSL_GOST89MAC:
1832 mac="GOST89";
1833 break;
1834 case SSL_GOST94:
1835 mac="GOST94";
1836 break;
1837 default:
1838 mac="unknown";
1839 break;
1840 }
1841
1842 if (buf == NULL)
1843 {
1844 len=128;
1845 buf=OPENSSL_malloc(len);
1846 if (buf == NULL) return("OPENSSL_malloc Error");
1847 }
1848 else if (len < 128)
1849 return("Buffer too small");
1850
1851 #ifdef KSSL_DEBUG
1852 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1853 #else
1854 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1855 #endif /* KSSL_DEBUG */
1856 return(buf);
1857 }
1858
1859 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1860 {
1861 int i;
1862
1863 if (c == NULL) return("(NONE)");
1864 i=(int)(c->id>>24L);
1865 if (i == 3)
1866 return("TLSv1/SSLv3");
1867 else if (i == 2)
1868 return("SSLv2");
1869 else
1870 return("unknown");
1871 }
1872
1873 /* return the actual cipher being used */
1874 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1875 {
1876 if (c != NULL)
1877 return(c->name);
1878 return("(NONE)");
1879 }
1880
1881 /* number of bits for symmetric cipher */
1882 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1883 {
1884 int ret=0;
1885
1886 if (c != NULL)
1887 {
1888 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1889 ret = c->strength_bits;
1890 }
1891 return(ret);
1892 }
1893
1894 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1895 {
1896 return c->id;
1897 }
1898
1899 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1900 {
1901 SSL_COMP *ctmp;
1902 int i,nn;
1903
1904 if ((n == 0) || (sk == NULL)) return(NULL);
1905 nn=sk_SSL_COMP_num(sk);
1906 for (i=0; i<nn; i++)
1907 {
1908 ctmp=sk_SSL_COMP_value(sk,i);
1909 if (ctmp->id == n)
1910 return(ctmp);
1911 }
1912 return(NULL);
1913 }
1914
1915 #ifdef OPENSSL_NO_COMP
1916 void *SSL_COMP_get_compression_methods(void)
1917 {
1918 return NULL;
1919 }
1920 int SSL_COMP_add_compression_method(int id, void *cm)
1921 {
1922 return 1;
1923 }
1924
1925 const char *SSL_COMP_get_name(const void *comp)
1926 {
1927 return NULL;
1928 }
1929 #else
1930 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1931 {
1932 load_builtin_compressions();
1933 return(ssl_comp_methods);
1934 }
1935
1936 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) *meths)
1937 {
1938 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1939 ssl_comp_methods = meths;
1940 return old_meths;
1941 }
1942
1943 static void cmeth_free(SSL_COMP *cm)
1944 {
1945 OPENSSL_free(cm);
1946 }
1947
1948 void SSL_COMP_free_compression_methods(void)
1949 {
1950 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1951 ssl_comp_methods = NULL;
1952 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1953 }
1954
1955 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1956 {
1957 SSL_COMP *comp;
1958
1959 if (cm == NULL || cm->type == NID_undef)
1960 return 1;
1961
1962 /* According to draft-ietf-tls-compression-04.txt, the
1963 compression number ranges should be the following:
1964
1965 0 to 63: methods defined by the IETF
1966 64 to 192: external party methods assigned by IANA
1967 193 to 255: reserved for private use */
1968 if (id < 193 || id > 255)
1969 {
1970 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1971 return 0;
1972 }
1973
1974 MemCheck_off();
1975 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1976 comp->id=id;
1977 comp->method=cm;
1978 load_builtin_compressions();
1979 if (ssl_comp_methods
1980 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1981 {
1982 OPENSSL_free(comp);
1983 MemCheck_on();
1984 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1985 return(1);
1986 }
1987 else if ((ssl_comp_methods == NULL)
1988 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1989 {
1990 OPENSSL_free(comp);
1991 MemCheck_on();
1992 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1993 return(1);
1994 }
1995 else
1996 {
1997 MemCheck_on();
1998 return(0);
1999 }
2000 }
2001
2002 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2003 {
2004 if (comp)
2005 return comp->name;
2006 return NULL;
2007 }
2008 #endif
2009 /* For a cipher return the index corresponding to the certificate type */
2010 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
2011 {
2012 unsigned long alg_k, alg_a;
2013
2014 alg_k = c->algorithm_mkey;
2015 alg_a = c->algorithm_auth;
2016
2017 if (alg_k & (SSL_kECDHr|SSL_kECDHe))
2018 {
2019 /* we don't need to look at SSL_kECDHE
2020 * since no certificate is needed for
2021 * anon ECDH and for authenticated
2022 * ECDHE, the check for the auth
2023 * algorithm will set i correctly
2024 * NOTE: For ECDH-RSA, we need an ECC
2025 * not an RSA cert but for ECDHE-RSA
2026 * we need an RSA cert. Placing the
2027 * checks for SSL_kECDH before RSA
2028 * checks ensures the correct cert is chosen.
2029 */
2030 return SSL_PKEY_ECC;
2031 }
2032 else if (alg_a & SSL_aECDSA)
2033 return SSL_PKEY_ECC;
2034 else if (alg_k & SSL_kDHr)
2035 return SSL_PKEY_DH_RSA;
2036 else if (alg_k & SSL_kDHd)
2037 return SSL_PKEY_DH_DSA;
2038 else if (alg_a & SSL_aDSS)
2039 return SSL_PKEY_DSA_SIGN;
2040 else if (alg_a & SSL_aRSA)
2041 return SSL_PKEY_RSA_ENC;
2042 else if (alg_a & SSL_aKRB5)
2043 /* VRS something else here? */
2044 return -1;
2045 else if (alg_a & SSL_aGOST94)
2046 return SSL_PKEY_GOST94;
2047 else if (alg_a & SSL_aGOST01)
2048 return SSL_PKEY_GOST01;
2049 return -1;
2050 }
2051
2052 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2053 {
2054 const SSL_CIPHER *c;
2055 c = ssl->method->get_cipher_by_char(ptr);
2056 if (c == NULL || c->valid == 0)
2057 return NULL;
2058 return c;
2059 }
2060
2061 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2062 {
2063 return ssl->method->get_cipher_by_char(ptr);
2064 }
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