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 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
170 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
171 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 /*
187 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
188 * in the ssl_locl.h
189 */
190 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
191 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
192 NULL, NULL, NULL, NULL, NULL, NULL
193 };
194
195 /*
196 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
197 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
198 * found
199 */
200 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
201 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
202 EVP_PKEY_HMAC, EVP_PKEY_HMAC
203 };
204
205 static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
206 0, 0, 0, 0, 0, 0
207 };
208
209 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX] = {
210 SSL_HANDSHAKE_MAC_MD5, SSL_HANDSHAKE_MAC_SHA,
211 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
212 SSL_HANDSHAKE_MAC_SHA384
213 };
214
215 #define CIPHER_ADD 1
216 #define CIPHER_KILL 2
217 #define CIPHER_DEL 3
218 #define CIPHER_ORD 4
219 #define CIPHER_SPECIAL 5
220
221 typedef struct cipher_order_st {
222 const SSL_CIPHER *cipher;
223 int active;
224 int dead;
225 struct cipher_order_st *next, *prev;
226 } CIPHER_ORDER;
227
228 static const SSL_CIPHER cipher_aliases[] = {
229 /* "ALL" doesn't include eNULL (must be specifically enabled) */
230 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, 0},
231 /* "COMPLEMENTOFALL" */
232 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
233
234 /*
235 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
236 * ALL!)
237 */
238 {0, SSL_TXT_CMPDEF, 0, 0, SSL_aNULL, ~SSL_eNULL, 0, ~SSL_SSLV2,
239 SSL_EXP_MASK, 0, 0, 0},
240
241 /*
242 * key exchange aliases (some of those using only a single bit here
243 * combine multiple key exchange algs according to the RFCs, e.g. kEDH
244 * combines DHE_DSS and DHE_RSA)
245 */
246 {0, SSL_TXT_kRSA, 0, SSL_kRSA, 0, 0, 0, 0, 0, 0, 0, 0},
247
248 {0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, 0, 0, 0, 0},
249 {0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
250 {0, SSL_TXT_kDH, 0, SSL_kDHr | SSL_kDHd, 0, 0, 0, 0, 0, 0, 0, 0},
251 {0, SSL_TXT_kEDH, 0, SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 0},
252 {0, SSL_TXT_kDHE, 0, SSL_kEDH, 0, 0, 0, 0, 0, 0, 0, 0},
253 {0, SSL_TXT_DH, 0, SSL_kDHr | SSL_kDHd | SSL_kEDH, 0, 0, 0, 0, 0, 0, 0,
254 0},
255
256 {0, SSL_TXT_kKRB5, 0, SSL_kKRB5, 0, 0, 0, 0, 0, 0, 0, 0},
257
258 {0, SSL_TXT_kECDHr, 0, SSL_kECDHr, 0, 0, 0, 0, 0, 0, 0, 0},
259 {0, SSL_TXT_kECDHe, 0, SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
260 {0, SSL_TXT_kECDH, 0, SSL_kECDHr | SSL_kECDHe, 0, 0, 0, 0, 0, 0, 0, 0},
261 {0, SSL_TXT_kEECDH, 0, SSL_kEECDH, 0, 0, 0, 0, 0, 0, 0, 0},
262 {0, SSL_TXT_kECDHE, 0, SSL_kEECDH, 0, 0, 0, 0, 0, 0, 0, 0},
263 {0, SSL_TXT_ECDH, 0, SSL_kECDHr | SSL_kECDHe | SSL_kEECDH, 0, 0, 0, 0, 0,
264 0, 0, 0},
265
266 {0, SSL_TXT_kPSK, 0, SSL_kPSK, 0, 0, 0, 0, 0, 0, 0, 0},
267 {0, SSL_TXT_kSRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
268 {0, SSL_TXT_kGOST, 0, SSL_kGOST, 0, 0, 0, 0, 0, 0, 0, 0},
269
270 /* server authentication aliases */
271 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
272 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
273 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
274 {0, SSL_TXT_aKRB5, 0, 0, SSL_aKRB5, 0, 0, 0, 0, 0, 0, 0},
275 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
276 /* no such ciphersuites supported! */
277 {0, SSL_TXT_aDH, 0, 0, SSL_aDH, 0, 0, 0, 0, 0, 0, 0},
278 {0, SSL_TXT_aECDH, 0, 0, SSL_aECDH, 0, 0, 0, 0, 0, 0, 0},
279 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
280 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
281 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0},
282 {0, SSL_TXT_aGOST94, 0, 0, SSL_aGOST94, 0, 0, 0, 0, 0, 0, 0},
283 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
284 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST94 | SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
285 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP, 0, 0, 0, 0, 0, 0, 0},
286
287 /* aliases combining key exchange and server authentication */
288 {0, SSL_TXT_EDH, 0, SSL_kEDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
289 {0, SSL_TXT_DHE, 0, SSL_kEDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
290 {0, SSL_TXT_EECDH, 0, SSL_kEECDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
291 {0, SSL_TXT_ECDHE, 0, SSL_kEECDH, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
292 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
293 {0, SSL_TXT_KRB5, 0, SSL_kKRB5, SSL_aKRB5, 0, 0, 0, 0, 0, 0, 0},
294 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
295 {0, SSL_TXT_ADH, 0, SSL_kEDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
296 {0, SSL_TXT_AECDH, 0, SSL_kEECDH, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
297 {0, SSL_TXT_PSK, 0, SSL_kPSK, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0},
298 {0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
299
300 /* symmetric encryption aliases */
301 {0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0},
302 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0},
303 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0},
304 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0},
305 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA, 0, 0, 0, 0, 0, 0},
306 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED, 0, 0, 0, 0, 0, 0},
307 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
308 {0, SSL_TXT_AES128, 0, 0, 0, SSL_AES128 | SSL_AES128GCM, 0, 0, 0, 0, 0,
309 0},
310 {0, SSL_TXT_AES256, 0, 0, 0, SSL_AES256 | SSL_AES256GCM, 0, 0, 0, 0, 0,
311 0},
312 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES, 0, 0, 0, 0, 0, 0},
313 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM, 0, 0, 0, 0,
314 0, 0},
315 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128, 0, 0, 0, 0, 0, 0},
316 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256, 0, 0, 0, 0, 0, 0},
317 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA128 | SSL_CAMELLIA256, 0, 0, 0,
318 0, 0, 0},
319
320 /* MAC aliases */
321 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5, 0, 0, 0, 0, 0},
322 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
323 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
324 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94, 0, 0, 0, 0, 0},
325 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC, 0, 0, 0, 0, 0},
326 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256, 0, 0, 0, 0, 0},
327 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384, 0, 0, 0, 0, 0},
328
329 /* protocol version aliases */
330 {0, SSL_TXT_SSLV2, 0, 0, 0, 0, 0, SSL_SSLV2, 0, 0, 0, 0},
331 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0},
332 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, SSL_TLSV1, 0, 0, 0, 0},
333 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, SSL_TLSV1_2, 0, 0, 0, 0},
334
335 /* export flag */
336 {0, SSL_TXT_EXP, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0},
337 {0, SSL_TXT_EXPORT, 0, 0, 0, 0, 0, 0, SSL_EXPORT, 0, 0, 0},
338
339 /* strength classes */
340 {0, SSL_TXT_EXP40, 0, 0, 0, 0, 0, 0, SSL_EXP40, 0, 0, 0},
341 {0, SSL_TXT_EXP56, 0, 0, 0, 0, 0, 0, SSL_EXP56, 0, 0, 0},
342 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, SSL_LOW, 0, 0, 0},
343 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, SSL_MEDIUM, 0, 0, 0},
344 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, SSL_HIGH, 0, 0, 0},
345 /* FIPS 140-2 approved ciphersuite */
346 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_FIPS, 0, 0, 0},
347 /* "DHE-" aliases to "EDH-" labels (for forward compatibility) */
348 {0, SSL3_TXT_DHE_DSS_DES_40_CBC_SHA, 0,
349 SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40,
350 0, 0, 0,},
351 {0, SSL3_TXT_DHE_DSS_DES_64_CBC_SHA, 0,
352 SSL_kDHE, SSL_aDSS, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW,
353 0, 0, 0,},
354 {0, SSL3_TXT_DHE_DSS_DES_192_CBC3_SHA, 0,
355 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, SSL_SSLV3,
356 SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,},
357 {0, SSL3_TXT_DHE_RSA_DES_40_CBC_SHA, 0,
358 SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_EXPORT | SSL_EXP40,
359 0, 0, 0,},
360 {0, SSL3_TXT_DHE_RSA_DES_64_CBC_SHA, 0,
361 SSL_kDHE, SSL_aRSA, SSL_DES, SSL_SHA1, SSL_SSLV3, SSL_NOT_EXP | SSL_LOW,
362 0, 0, 0,},
363 {0, SSL3_TXT_DHE_RSA_DES_192_CBC3_SHA, 0,
364 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, SSL_SSLV3,
365 SSL_NOT_EXP | SSL_HIGH | SSL_FIPS, 0, 0, 0,},
366 };
367
368 /*
369 * Search for public key algorithm with given name and return its pkey_id if
370 * it is available. Otherwise return 0
371 */
372 #ifdef OPENSSL_NO_ENGINE
373
get_optional_pkey_id(const char * pkey_name)374 static int get_optional_pkey_id(const char *pkey_name)
375 {
376 const EVP_PKEY_ASN1_METHOD *ameth;
377 int pkey_id = 0;
378 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
379 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
380 ameth) > 0) {
381 return pkey_id;
382 }
383 return 0;
384 }
385
386 #else
387
get_optional_pkey_id(const char * pkey_name)388 static int get_optional_pkey_id(const char *pkey_name)
389 {
390 const EVP_PKEY_ASN1_METHOD *ameth;
391 ENGINE *tmpeng = NULL;
392 int pkey_id = 0;
393 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
394 if (ameth) {
395 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
396 ameth) <= 0)
397 pkey_id = 0;
398 }
399 if (tmpeng)
400 ENGINE_finish(tmpeng);
401 return pkey_id;
402 }
403
404 #endif
405
ssl_load_ciphers(void)406 void ssl_load_ciphers(void)
407 {
408 ssl_cipher_methods[SSL_ENC_DES_IDX] = EVP_get_cipherbyname(SN_des_cbc);
409 ssl_cipher_methods[SSL_ENC_3DES_IDX] =
410 EVP_get_cipherbyname(SN_des_ede3_cbc);
411 ssl_cipher_methods[SSL_ENC_RC4_IDX] = EVP_get_cipherbyname(SN_rc4);
412 ssl_cipher_methods[SSL_ENC_RC2_IDX] = EVP_get_cipherbyname(SN_rc2_cbc);
413 #ifndef OPENSSL_NO_IDEA
414 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = EVP_get_cipherbyname(SN_idea_cbc);
415 #else
416 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL;
417 #endif
418 ssl_cipher_methods[SSL_ENC_AES128_IDX] =
419 EVP_get_cipherbyname(SN_aes_128_cbc);
420 ssl_cipher_methods[SSL_ENC_AES256_IDX] =
421 EVP_get_cipherbyname(SN_aes_256_cbc);
422 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] =
423 EVP_get_cipherbyname(SN_camellia_128_cbc);
424 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] =
425 EVP_get_cipherbyname(SN_camellia_256_cbc);
426 ssl_cipher_methods[SSL_ENC_GOST89_IDX] =
427 EVP_get_cipherbyname(SN_gost89_cnt);
428 ssl_cipher_methods[SSL_ENC_SEED_IDX] = EVP_get_cipherbyname(SN_seed_cbc);
429
430 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] =
431 EVP_get_cipherbyname(SN_aes_128_gcm);
432 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] =
433 EVP_get_cipherbyname(SN_aes_256_gcm);
434
435 ssl_digest_methods[SSL_MD_MD5_IDX] = EVP_get_digestbyname(SN_md5);
436 ssl_mac_secret_size[SSL_MD_MD5_IDX] =
437 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
438 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
439 ssl_digest_methods[SSL_MD_SHA1_IDX] = EVP_get_digestbyname(SN_sha1);
440 ssl_mac_secret_size[SSL_MD_SHA1_IDX] =
441 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
442 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
443 ssl_digest_methods[SSL_MD_GOST94_IDX] =
444 EVP_get_digestbyname(SN_id_GostR3411_94);
445 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) {
446 ssl_mac_secret_size[SSL_MD_GOST94_IDX] =
447 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
448 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
449 }
450 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] =
451 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
452 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
453 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
454 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
455 }
456
457 ssl_digest_methods[SSL_MD_SHA256_IDX] = EVP_get_digestbyname(SN_sha256);
458 ssl_mac_secret_size[SSL_MD_SHA256_IDX] =
459 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
460 ssl_digest_methods[SSL_MD_SHA384_IDX] = EVP_get_digestbyname(SN_sha384);
461 ssl_mac_secret_size[SSL_MD_SHA384_IDX] =
462 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
463 }
464
465 #ifndef OPENSSL_NO_COMP
466
sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)467 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
468 {
469 return ((*a)->id - (*b)->id);
470 }
471
load_builtin_compressions(void)472 static void load_builtin_compressions(void)
473 {
474 int got_write_lock = 0;
475
476 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
477 if (ssl_comp_methods == NULL) {
478 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
479 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
480 got_write_lock = 1;
481
482 if (ssl_comp_methods == NULL) {
483 SSL_COMP *comp = NULL;
484
485 MemCheck_off();
486 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
487 if (ssl_comp_methods != NULL) {
488 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
489 if (comp != NULL) {
490 comp->method = COMP_zlib();
491 if (comp->method && comp->method->type == NID_undef)
492 OPENSSL_free(comp);
493 else {
494 comp->id = SSL_COMP_ZLIB_IDX;
495 comp->name = comp->method->name;
496 sk_SSL_COMP_push(ssl_comp_methods, comp);
497 }
498 }
499 sk_SSL_COMP_sort(ssl_comp_methods);
500 }
501 MemCheck_on();
502 }
503 }
504
505 if (got_write_lock)
506 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
507 else
508 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
509 }
510 #endif
511
ssl_cipher_get_evp(const SSL_SESSION * s,const EVP_CIPHER ** enc,const EVP_MD ** md,int * mac_pkey_type,int * mac_secret_size,SSL_COMP ** comp)512 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
513 const EVP_MD **md, int *mac_pkey_type,
514 int *mac_secret_size, SSL_COMP **comp)
515 {
516 int i;
517 const SSL_CIPHER *c;
518
519 c = s->cipher;
520 if (c == NULL)
521 return (0);
522 if (comp != NULL) {
523 SSL_COMP ctmp;
524 #ifndef OPENSSL_NO_COMP
525 load_builtin_compressions();
526 #endif
527
528 *comp = NULL;
529 ctmp.id = s->compress_meth;
530 if (ssl_comp_methods != NULL) {
531 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
532 if (i >= 0)
533 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
534 else
535 *comp = NULL;
536 }
537 }
538
539 if ((enc == NULL) || (md == NULL))
540 return (0);
541
542 switch (c->algorithm_enc) {
543 case SSL_DES:
544 i = SSL_ENC_DES_IDX;
545 break;
546 case SSL_3DES:
547 i = SSL_ENC_3DES_IDX;
548 break;
549 case SSL_RC4:
550 i = SSL_ENC_RC4_IDX;
551 break;
552 case SSL_RC2:
553 i = SSL_ENC_RC2_IDX;
554 break;
555 case SSL_IDEA:
556 i = SSL_ENC_IDEA_IDX;
557 break;
558 case SSL_eNULL:
559 i = SSL_ENC_NULL_IDX;
560 break;
561 case SSL_AES128:
562 i = SSL_ENC_AES128_IDX;
563 break;
564 case SSL_AES256:
565 i = SSL_ENC_AES256_IDX;
566 break;
567 case SSL_CAMELLIA128:
568 i = SSL_ENC_CAMELLIA128_IDX;
569 break;
570 case SSL_CAMELLIA256:
571 i = SSL_ENC_CAMELLIA256_IDX;
572 break;
573 case SSL_eGOST2814789CNT:
574 i = SSL_ENC_GOST89_IDX;
575 break;
576 case SSL_SEED:
577 i = SSL_ENC_SEED_IDX;
578 break;
579 case SSL_AES128GCM:
580 i = SSL_ENC_AES128GCM_IDX;
581 break;
582 case SSL_AES256GCM:
583 i = SSL_ENC_AES256GCM_IDX;
584 break;
585 default:
586 i = -1;
587 break;
588 }
589
590 if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
591 *enc = NULL;
592 else {
593 if (i == SSL_ENC_NULL_IDX)
594 *enc = EVP_enc_null();
595 else
596 *enc = ssl_cipher_methods[i];
597 }
598
599 switch (c->algorithm_mac) {
600 case SSL_MD5:
601 i = SSL_MD_MD5_IDX;
602 break;
603 case SSL_SHA1:
604 i = SSL_MD_SHA1_IDX;
605 break;
606 case SSL_SHA256:
607 i = SSL_MD_SHA256_IDX;
608 break;
609 case SSL_SHA384:
610 i = SSL_MD_SHA384_IDX;
611 break;
612 case SSL_GOST94:
613 i = SSL_MD_GOST94_IDX;
614 break;
615 case SSL_GOST89MAC:
616 i = SSL_MD_GOST89MAC_IDX;
617 break;
618 default:
619 i = -1;
620 break;
621 }
622 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) {
623 *md = NULL;
624 if (mac_pkey_type != NULL)
625 *mac_pkey_type = NID_undef;
626 if (mac_secret_size != NULL)
627 *mac_secret_size = 0;
628 if (c->algorithm_mac == SSL_AEAD)
629 mac_pkey_type = NULL;
630 } else {
631 *md = ssl_digest_methods[i];
632 if (mac_pkey_type != NULL)
633 *mac_pkey_type = ssl_mac_pkey_id[i];
634 if (mac_secret_size != NULL)
635 *mac_secret_size = ssl_mac_secret_size[i];
636 }
637
638 if ((*enc != NULL) &&
639 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
640 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
641 const EVP_CIPHER *evp;
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 } else
674 return (0);
675 }
676
ssl_get_handshake_digest(int idx,long * mask,const EVP_MD ** md)677 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
678 {
679 if (idx < 0 || idx >= SSL_MD_NUM_IDX) {
680 return 0;
681 }
682 *mask = ssl_handshake_digest_flag[idx];
683 if (*mask)
684 *md = ssl_digest_methods[idx];
685 else
686 *md = NULL;
687 return 1;
688 }
689
690 #define ITEM_SEP(a) \
691 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
692
ll_append_tail(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)693 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
694 CIPHER_ORDER **tail)
695 {
696 if (curr == *tail)
697 return;
698 if (curr == *head)
699 *head = curr->next;
700 if (curr->prev != NULL)
701 curr->prev->next = curr->next;
702 if (curr->next != NULL)
703 curr->next->prev = curr->prev;
704 (*tail)->next = curr;
705 curr->prev = *tail;
706 curr->next = NULL;
707 *tail = curr;
708 }
709
ll_append_head(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)710 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
711 CIPHER_ORDER **tail)
712 {
713 if (curr == *head)
714 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
ssl_cipher_get_disabled(unsigned long * mkey,unsigned long * auth,unsigned long * enc,unsigned long * mac,unsigned long * ssl)727 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth,
728 unsigned long *enc, unsigned long *mac,
729 unsigned long *ssl)
730 {
731 *mkey = 0;
732 *auth = 0;
733 *enc = 0;
734 *mac = 0;
735 *ssl = 0;
736
737 #ifdef OPENSSL_NO_RSA
738 *mkey |= SSL_kRSA;
739 *auth |= SSL_aRSA;
740 #endif
741 #ifdef OPENSSL_NO_DSA
742 *auth |= SSL_aDSS;
743 #endif
744 #ifdef OPENSSL_NO_DH
745 *mkey |= SSL_kDHr | SSL_kDHd | SSL_kEDH;
746 *auth |= SSL_aDH;
747 #endif
748 #ifdef OPENSSL_NO_KRB5
749 *mkey |= SSL_kKRB5;
750 *auth |= SSL_aKRB5;
751 #endif
752 #ifdef OPENSSL_NO_ECDSA
753 *auth |= SSL_aECDSA;
754 #endif
755 #ifdef OPENSSL_NO_ECDH
756 *mkey |= SSL_kECDHe | SSL_kECDHr;
757 *auth |= SSL_aECDH;
758 #endif
759 #ifdef OPENSSL_NO_PSK
760 *mkey |= SSL_kPSK;
761 *auth |= SSL_aPSK;
762 #endif
763 #ifdef OPENSSL_NO_SRP
764 *mkey |= SSL_kSRP;
765 #endif
766 /*
767 * Check for presence of GOST 34.10 algorithms, and if they do not
768 * present, disable appropriate auth and key exchange
769 */
770 if (!get_optional_pkey_id("gost94")) {
771 *auth |= SSL_aGOST94;
772 }
773 if (!get_optional_pkey_id("gost2001")) {
774 *auth |= SSL_aGOST01;
775 }
776 /*
777 * Disable GOST key exchange if no GOST signature algs are available *
778 */
779 if ((*auth & (SSL_aGOST94 | SSL_aGOST01)) == (SSL_aGOST94 | SSL_aGOST01)) {
780 *mkey |= SSL_kGOST;
781 }
782 #ifdef SSL_FORBID_ENULL
783 *enc |= SSL_eNULL;
784 #endif
785
786 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX] == NULL) ? SSL_DES : 0;
787 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0;
788 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX] == NULL) ? SSL_RC4 : 0;
789 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX] == NULL) ? SSL_RC2 : 0;
790 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0;
791 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0;
792 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0;
793 *enc |=
794 (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] ==
795 NULL) ? SSL_AES128GCM : 0;
796 *enc |=
797 (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] ==
798 NULL) ? SSL_AES256GCM : 0;
799 *enc |=
800 (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] ==
801 NULL) ? SSL_CAMELLIA128 : 0;
802 *enc |=
803 (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] ==
804 NULL) ? SSL_CAMELLIA256 : 0;
805 *enc |=
806 (ssl_cipher_methods[SSL_ENC_GOST89_IDX] ==
807 NULL) ? SSL_eGOST2814789CNT : 0;
808 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED : 0;
809
810 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX] == NULL) ? SSL_MD5 : 0;
811 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0;
812 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0;
813 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0;
814 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0;
815 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL
816 || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] ==
817 NID_undef) ? SSL_GOST89MAC : 0;
818
819 }
820
ssl_cipher_collect_ciphers(const SSL_METHOD * ssl_method,int num_of_ciphers,unsigned long disabled_mkey,unsigned long disabled_auth,unsigned long disabled_enc,unsigned long disabled_mac,unsigned long disabled_ssl,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)821 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
822 int num_of_ciphers,
823 unsigned long disabled_mkey,
824 unsigned long disabled_auth,
825 unsigned long disabled_enc,
826 unsigned long disabled_mac,
827 unsigned long disabled_ssl,
828 CIPHER_ORDER *co_list,
829 CIPHER_ORDER **head_p,
830 CIPHER_ORDER **tail_p)
831 {
832 int i, co_list_num;
833 const SSL_CIPHER *c;
834
835 /*
836 * We have num_of_ciphers descriptions compiled in, depending on the
837 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
838 * These will later be sorted in a linked list with at most num
839 * entries.
840 */
841
842 /* Get the initial list of ciphers */
843 co_list_num = 0; /* actual count of ciphers */
844 for (i = 0; i < num_of_ciphers; i++) {
845 c = ssl_method->get_cipher(i);
846 /* drop those that use any of that is not available */
847 if ((c != NULL) && c->valid &&
848 #ifdef OPENSSL_FIPS
849 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
850 #endif
851 !(c->algorithm_mkey & disabled_mkey) &&
852 !(c->algorithm_auth & disabled_auth) &&
853 !(c->algorithm_enc & disabled_enc) &&
854 !(c->algorithm_mac & disabled_mac) &&
855 !(c->algorithm_ssl & disabled_ssl)) {
856 co_list[co_list_num].cipher = c;
857 co_list[co_list_num].next = NULL;
858 co_list[co_list_num].prev = NULL;
859 co_list[co_list_num].active = 0;
860 co_list_num++;
861 #ifdef KSSL_DEBUG
862 fprintf(stderr, "\t%d: %s %lx %lx %lx\n", i, c->name, c->id,
863 c->algorithm_mkey, c->algorithm_auth);
864 #endif /* KSSL_DEBUG */
865 /*
866 * if (!sk_push(ca_list,(char *)c)) goto err;
867 */
868 }
869 }
870
871 /*
872 * Prepare linked list from list entries
873 */
874 if (co_list_num > 0) {
875 co_list[0].prev = NULL;
876
877 if (co_list_num > 1) {
878 co_list[0].next = &co_list[1];
879
880 for (i = 1; i < co_list_num - 1; i++) {
881 co_list[i].prev = &co_list[i - 1];
882 co_list[i].next = &co_list[i + 1];
883 }
884
885 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
886 }
887
888 co_list[co_list_num - 1].next = NULL;
889
890 *head_p = &co_list[0];
891 *tail_p = &co_list[co_list_num - 1];
892 }
893 }
894
ssl_cipher_collect_aliases(const SSL_CIPHER ** ca_list,int num_of_group_aliases,unsigned long disabled_mkey,unsigned long disabled_auth,unsigned long disabled_enc,unsigned long disabled_mac,unsigned long disabled_ssl,CIPHER_ORDER * head)895 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
896 int num_of_group_aliases,
897 unsigned long disabled_mkey,
898 unsigned long disabled_auth,
899 unsigned long disabled_enc,
900 unsigned long disabled_mac,
901 unsigned long disabled_ssl,
902 CIPHER_ORDER *head)
903 {
904 CIPHER_ORDER *ciph_curr;
905 const SSL_CIPHER **ca_curr;
906 int i;
907 unsigned long mask_mkey = ~disabled_mkey;
908 unsigned long mask_auth = ~disabled_auth;
909 unsigned long mask_enc = ~disabled_enc;
910 unsigned long mask_mac = ~disabled_mac;
911 unsigned long mask_ssl = ~disabled_ssl;
912
913 /*
914 * First, add the real ciphers as already collected
915 */
916 ciph_curr = head;
917 ca_curr = ca_list;
918 while (ciph_curr != NULL) {
919 *ca_curr = ciph_curr->cipher;
920 ca_curr++;
921 ciph_curr = ciph_curr->next;
922 }
923
924 /*
925 * Now we add the available ones from the cipher_aliases[] table.
926 * They represent either one or more algorithms, some of which
927 * in any affected category must be supported (set in enabled_mask),
928 * or represent a cipher strength value (will be added in any case because algorithms=0).
929 */
930 for (i = 0; i < num_of_group_aliases; i++) {
931 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
932 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
933 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
934 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
935 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
936
937 if (algorithm_mkey)
938 if ((algorithm_mkey & mask_mkey) == 0)
939 continue;
940
941 if (algorithm_auth)
942 if ((algorithm_auth & mask_auth) == 0)
943 continue;
944
945 if (algorithm_enc)
946 if ((algorithm_enc & mask_enc) == 0)
947 continue;
948
949 if (algorithm_mac)
950 if ((algorithm_mac & mask_mac) == 0)
951 continue;
952
953 if (algorithm_ssl)
954 if ((algorithm_ssl & mask_ssl) == 0)
955 continue;
956
957 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
958 ca_curr++;
959 }
960
961 *ca_curr = NULL; /* end of list */
962 }
963
ssl_cipher_apply_rule(unsigned long cipher_id,unsigned long alg_mkey,unsigned long alg_auth,unsigned long alg_enc,unsigned long alg_mac,unsigned long alg_ssl,unsigned long algo_strength,int rule,int strength_bits,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)964 static void ssl_cipher_apply_rule(unsigned long cipher_id,
965 unsigned long alg_mkey,
966 unsigned long alg_auth,
967 unsigned long alg_enc,
968 unsigned long alg_mac,
969 unsigned long alg_ssl,
970 unsigned long algo_strength, int rule,
971 int strength_bits, CIPHER_ORDER **head_p,
972 CIPHER_ORDER **tail_p)
973 {
974 CIPHER_ORDER *head, *tail, *curr, *next, *last;
975 const SSL_CIPHER *cp;
976 int reverse = 0;
977
978 #ifdef CIPHER_DEBUG
979 fprintf(stderr,
980 "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
981 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
982 algo_strength, strength_bits);
983 #endif
984
985 if (rule == CIPHER_DEL)
986 reverse = 1; /* needed to maintain sorting between
987 * currently deleted ciphers */
988
989 head = *head_p;
990 tail = *tail_p;
991
992 if (reverse) {
993 next = tail;
994 last = head;
995 } else {
996 next = head;
997 last = tail;
998 }
999
1000 curr = NULL;
1001 for (;;) {
1002 if (curr == last)
1003 break;
1004
1005 curr = next;
1006
1007 if (curr == NULL)
1008 break;
1009
1010 next = reverse ? curr->prev : curr->next;
1011
1012 cp = curr->cipher;
1013
1014 /*
1015 * Selection criteria is either the value of strength_bits
1016 * or the algorithms used.
1017 */
1018 if (strength_bits >= 0) {
1019 if (strength_bits != cp->strength_bits)
1020 continue;
1021 } else {
1022 #ifdef CIPHER_DEBUG
1023 fprintf(stderr,
1024 "\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n",
1025 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
1026 cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl,
1027 cp->algo_strength);
1028 #endif
1029 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1030 if (cipher_id && cipher_id != cp->id)
1031 continue;
1032 #endif
1033 if (algo_strength == SSL_EXP_MASK && SSL_C_IS_EXPORT(cp))
1034 goto ok;
1035 if (alg_ssl == ~SSL_SSLV2 && cp->algorithm_ssl == SSL_SSLV2)
1036 goto ok;
1037 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1038 continue;
1039 if (alg_auth && !(alg_auth & cp->algorithm_auth))
1040 continue;
1041 if (alg_enc && !(alg_enc & cp->algorithm_enc))
1042 continue;
1043 if (alg_mac && !(alg_mac & cp->algorithm_mac))
1044 continue;
1045 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1046 continue;
1047 if ((algo_strength & SSL_EXP_MASK)
1048 && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1049 continue;
1050 if ((algo_strength & SSL_STRONG_MASK)
1051 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1052 continue;
1053 }
1054
1055 ok:
1056
1057 #ifdef CIPHER_DEBUG
1058 fprintf(stderr, "Action = %d\n", rule);
1059 #endif
1060
1061 /* add the cipher if it has not been added yet. */
1062 if (rule == CIPHER_ADD) {
1063 /* reverse == 0 */
1064 if (!curr->active) {
1065 ll_append_tail(&head, curr, &tail);
1066 curr->active = 1;
1067 }
1068 }
1069 /* Move the added cipher to this location */
1070 else if (rule == CIPHER_ORD) {
1071 /* reverse == 0 */
1072 if (curr->active) {
1073 ll_append_tail(&head, curr, &tail);
1074 }
1075 } else if (rule == CIPHER_DEL) {
1076 /* reverse == 1 */
1077 if (curr->active) {
1078 /*
1079 * most recently deleted ciphersuites get best positions for
1080 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
1081 * in reverse to maintain the order)
1082 */
1083 ll_append_head(&head, curr, &tail);
1084 curr->active = 0;
1085 }
1086 } else if (rule == CIPHER_KILL) {
1087 /* reverse == 0 */
1088 if (head == curr)
1089 head = curr->next;
1090 else
1091 curr->prev->next = curr->next;
1092 if (tail == curr)
1093 tail = curr->prev;
1094 curr->active = 0;
1095 if (curr->next != NULL)
1096 curr->next->prev = curr->prev;
1097 if (curr->prev != NULL)
1098 curr->prev->next = curr->next;
1099 curr->next = NULL;
1100 curr->prev = NULL;
1101 }
1102 }
1103
1104 *head_p = head;
1105 *tail_p = tail;
1106 }
1107
ssl_cipher_strength_sort(CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)1108 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1109 CIPHER_ORDER **tail_p)
1110 {
1111 int max_strength_bits, i, *number_uses;
1112 CIPHER_ORDER *curr;
1113
1114 /*
1115 * This routine sorts the ciphers with descending strength. The sorting
1116 * must keep the pre-sorted sequence, so we apply the normal sorting
1117 * routine as '+' movement to the end of the list.
1118 */
1119 max_strength_bits = 0;
1120 curr = *head_p;
1121 while (curr != NULL) {
1122 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
1123 max_strength_bits = curr->cipher->strength_bits;
1124 curr = curr->next;
1125 }
1126
1127 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1128 if (!number_uses) {
1129 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
1130 return (0);
1131 }
1132 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1133
1134 /*
1135 * Now find the strength_bits values actually used
1136 */
1137 curr = *head_p;
1138 while (curr != NULL) {
1139 if (curr->active)
1140 number_uses[curr->cipher->strength_bits]++;
1141 curr = curr->next;
1142 }
1143 /*
1144 * Go through the list of used strength_bits values in descending
1145 * order.
1146 */
1147 for (i = max_strength_bits; i >= 0; i--)
1148 if (number_uses[i] > 0)
1149 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
1150 tail_p);
1151
1152 OPENSSL_free(number_uses);
1153 return (1);
1154 }
1155
ssl_cipher_process_rulestr(const char * rule_str,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p,const SSL_CIPHER ** ca_list)1156 static int ssl_cipher_process_rulestr(const char *rule_str,
1157 CIPHER_ORDER **head_p,
1158 CIPHER_ORDER **tail_p,
1159 const SSL_CIPHER **ca_list)
1160 {
1161 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
1162 algo_strength;
1163 const char *l, *buf;
1164 int j, multi, found, rule, retval, ok, buflen;
1165 unsigned long cipher_id = 0;
1166 char ch;
1167
1168 retval = 1;
1169 l = rule_str;
1170 for (;;) {
1171 ch = *l;
1172
1173 if (ch == '\0')
1174 break; /* done */
1175 if (ch == '-') {
1176 rule = CIPHER_DEL;
1177 l++;
1178 } else if (ch == '+') {
1179 rule = CIPHER_ORD;
1180 l++;
1181 } else if (ch == '!') {
1182 rule = CIPHER_KILL;
1183 l++;
1184 } else if (ch == '@') {
1185 rule = CIPHER_SPECIAL;
1186 l++;
1187 } else {
1188 rule = CIPHER_ADD;
1189 }
1190
1191 if (ITEM_SEP(ch)) {
1192 l++;
1193 continue;
1194 }
1195
1196 alg_mkey = 0;
1197 alg_auth = 0;
1198 alg_enc = 0;
1199 alg_mac = 0;
1200 alg_ssl = 0;
1201 algo_strength = 0;
1202
1203 for (;;) {
1204 ch = *l;
1205 buf = l;
1206 buflen = 0;
1207 #ifndef CHARSET_EBCDIC
1208 while (((ch >= 'A') && (ch <= 'Z')) ||
1209 ((ch >= '0') && (ch <= '9')) ||
1210 ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '.'))
1211 #else
1212 while (isalnum(ch) || (ch == '-') || (ch == '.'))
1213 #endif
1214 {
1215 ch = *(++l);
1216 buflen++;
1217 }
1218
1219 if (buflen == 0) {
1220 /*
1221 * We hit something we cannot deal with,
1222 * it is no command or separator nor
1223 * alphanumeric, so we call this an error.
1224 */
1225 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1226 SSL_R_INVALID_COMMAND);
1227 retval = found = 0;
1228 l++;
1229 break;
1230 }
1231
1232 if (rule == CIPHER_SPECIAL) {
1233 found = 0; /* unused -- avoid compiler warning */
1234 break; /* special treatment */
1235 }
1236
1237 /* check for multi-part specification */
1238 if (ch == '+') {
1239 multi = 1;
1240 l++;
1241 } else
1242 multi = 0;
1243
1244 /*
1245 * Now search for the cipher alias in the ca_list. Be careful
1246 * with the strncmp, because the "buflen" limitation
1247 * will make the rule "ADH:SOME" and the cipher
1248 * "ADH-MY-CIPHER" look like a match for buflen=3.
1249 * So additionally check whether the cipher name found
1250 * has the correct length. We can save a strlen() call:
1251 * just checking for the '\0' at the right place is
1252 * sufficient, we have to strncmp() anyway. (We cannot
1253 * use strcmp(), because buf is not '\0' terminated.)
1254 */
1255 j = found = 0;
1256 cipher_id = 0;
1257 while (ca_list[j]) {
1258 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1259 (ca_list[j]->name[buflen] == '\0')) {
1260 found = 1;
1261 break;
1262 } else
1263 j++;
1264 }
1265
1266 if (!found)
1267 break; /* ignore this entry */
1268
1269 if (ca_list[j]->algorithm_mkey) {
1270 if (alg_mkey) {
1271 alg_mkey &= ca_list[j]->algorithm_mkey;
1272 if (!alg_mkey) {
1273 found = 0;
1274 break;
1275 }
1276 } else
1277 alg_mkey = ca_list[j]->algorithm_mkey;
1278 }
1279
1280 if (ca_list[j]->algorithm_auth) {
1281 if (alg_auth) {
1282 alg_auth &= ca_list[j]->algorithm_auth;
1283 if (!alg_auth) {
1284 found = 0;
1285 break;
1286 }
1287 } else
1288 alg_auth = ca_list[j]->algorithm_auth;
1289 }
1290
1291 if (ca_list[j]->algorithm_enc) {
1292 if (alg_enc) {
1293 alg_enc &= ca_list[j]->algorithm_enc;
1294 if (!alg_enc) {
1295 found = 0;
1296 break;
1297 }
1298 } else
1299 alg_enc = ca_list[j]->algorithm_enc;
1300 }
1301
1302 if (ca_list[j]->algorithm_mac) {
1303 if (alg_mac) {
1304 alg_mac &= ca_list[j]->algorithm_mac;
1305 if (!alg_mac) {
1306 found = 0;
1307 break;
1308 }
1309 } else
1310 alg_mac = ca_list[j]->algorithm_mac;
1311 }
1312
1313 if (ca_list[j]->algo_strength & SSL_EXP_MASK) {
1314 if (algo_strength & SSL_EXP_MASK) {
1315 algo_strength &=
1316 (ca_list[j]->algo_strength & SSL_EXP_MASK) |
1317 ~SSL_EXP_MASK;
1318 if (!(algo_strength & SSL_EXP_MASK)) {
1319 found = 0;
1320 break;
1321 }
1322 } else
1323 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1324 }
1325
1326 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1327 if (algo_strength & SSL_STRONG_MASK) {
1328 algo_strength &=
1329 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1330 ~SSL_STRONG_MASK;
1331 if (!(algo_strength & SSL_STRONG_MASK)) {
1332 found = 0;
1333 break;
1334 }
1335 } else
1336 algo_strength |=
1337 ca_list[j]->algo_strength & SSL_STRONG_MASK;
1338 }
1339
1340 if (ca_list[j]->valid) {
1341 /*
1342 * explicit ciphersuite found; its protocol version does not
1343 * become part of the search pattern!
1344 */
1345
1346 cipher_id = ca_list[j]->id;
1347 } else {
1348 /*
1349 * not an explicit ciphersuite; only in this case, the
1350 * protocol version is considered part of the search pattern
1351 */
1352
1353 if (ca_list[j]->algorithm_ssl) {
1354 if (alg_ssl) {
1355 alg_ssl &= ca_list[j]->algorithm_ssl;
1356 if (!alg_ssl) {
1357 found = 0;
1358 break;
1359 }
1360 } else
1361 alg_ssl = ca_list[j]->algorithm_ssl;
1362 }
1363 }
1364
1365 if (!multi)
1366 break;
1367 }
1368
1369 /*
1370 * Ok, we have the rule, now apply it
1371 */
1372 if (rule == CIPHER_SPECIAL) { /* special command */
1373 ok = 0;
1374 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8))
1375 ok = ssl_cipher_strength_sort(head_p, tail_p);
1376 else
1377 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1378 SSL_R_INVALID_COMMAND);
1379 if (ok == 0)
1380 retval = 0;
1381 /*
1382 * We do not support any "multi" options
1383 * together with "@", so throw away the
1384 * rest of the command, if any left, until
1385 * end or ':' is found.
1386 */
1387 while ((*l != '\0') && !ITEM_SEP(*l))
1388 l++;
1389 } else if (found) {
1390 ssl_cipher_apply_rule(cipher_id,
1391 alg_mkey, alg_auth, alg_enc, alg_mac,
1392 alg_ssl, algo_strength, rule, -1, head_p,
1393 tail_p);
1394 } else {
1395 while ((*l != '\0') && !ITEM_SEP(*l))
1396 l++;
1397 }
1398 if (*l == '\0')
1399 break; /* done */
1400 }
1401
1402 return (retval);
1403 }
1404
1405 #ifndef OPENSSL_NO_EC
check_suiteb_cipher_list(const SSL_METHOD * meth,CERT * c,const char ** prule_str)1406 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1407 const char **prule_str)
1408 {
1409 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1410 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1411 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1412 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1413 suiteb_comb2 = 1;
1414 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1415 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1416 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1417 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1418 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1419 }
1420
1421 if (suiteb_flags) {
1422 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1423 c->cert_flags |= suiteb_flags;
1424 } else
1425 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1426
1427 if (!suiteb_flags)
1428 return 1;
1429 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1430
1431 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1432 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1433 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1434 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1435 else
1436 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1437 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1438 return 0;
1439 }
1440 # ifndef OPENSSL_NO_ECDH
1441 switch (suiteb_flags) {
1442 case SSL_CERT_FLAG_SUITEB_128_LOS:
1443 if (suiteb_comb2)
1444 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1445 else
1446 *prule_str =
1447 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1448 break;
1449 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1450 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1451 break;
1452 case SSL_CERT_FLAG_SUITEB_192_LOS:
1453 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1454 break;
1455 }
1456 /* Set auto ECDH parameter determination */
1457 c->ecdh_tmp_auto = 1;
1458 return 1;
1459 # else
1460 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1461 SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1462 return 0;
1463 # endif
1464 }
1465 #endif
1466
STACK_OF(SSL_CIPHER)1467 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1468 **cipher_list, STACK_OF(SSL_CIPHER)
1469 **cipher_list_by_id,
1470 const char *rule_str, CERT *c)
1471 {
1472 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1473 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac,
1474 disabled_ssl;
1475 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1476 const char *rule_p;
1477 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1478 const SSL_CIPHER **ca_list = NULL;
1479
1480 /*
1481 * Return with error if nothing to do.
1482 */
1483 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1484 return NULL;
1485 #ifndef OPENSSL_NO_EC
1486 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1487 return NULL;
1488 #endif
1489
1490 /*
1491 * To reduce the work to do we only want to process the compiled
1492 * in algorithms, so we first get the mask of disabled ciphers.
1493 */
1494 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc,
1495 &disabled_mac, &disabled_ssl);
1496
1497 /*
1498 * Now we have to collect the available ciphers from the compiled
1499 * in ciphers. We cannot get more than the number compiled in, so
1500 * it is used for allocation.
1501 */
1502 num_of_ciphers = ssl_method->num_ciphers();
1503 #ifdef KSSL_DEBUG
1504 fprintf(stderr, "ssl_create_cipher_list() for %d ciphers\n",
1505 num_of_ciphers);
1506 #endif /* KSSL_DEBUG */
1507 co_list =
1508 (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1509 if (co_list == NULL) {
1510 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1511 return (NULL); /* Failure */
1512 }
1513
1514 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1515 disabled_mkey, disabled_auth, disabled_enc,
1516 disabled_mac, disabled_ssl, co_list, &head,
1517 &tail);
1518
1519 /* Now arrange all ciphers by preference: */
1520
1521 /*
1522 * Everything else being equal, prefer ephemeral ECDH over other key
1523 * exchange mechanisms
1524 */
1525 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1526 &tail);
1527 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1528 &tail);
1529
1530 /* AES is our preferred symmetric cipher */
1531 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head,
1532 &tail);
1533
1534 /* Temporarily enable everything else for sorting */
1535 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1536
1537 /* Low priority for MD5 */
1538 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1539 &tail);
1540
1541 /*
1542 * Move anonymous ciphers to the end. Usually, these will remain
1543 * disabled. (For applications that allow them, they aren't too bad, but
1544 * we prefer authenticated ciphers.)
1545 */
1546 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1547 &tail);
1548
1549 /* Move ciphers without forward secrecy to the end */
1550 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1551 &tail);
1552 /*
1553 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
1554 * &head, &tail);
1555 */
1556 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1557 &tail);
1558 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1559 &tail);
1560 ssl_cipher_apply_rule(0, SSL_kKRB5, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1561 &tail);
1562
1563 /* RC4 is sort-of broken -- move the the end */
1564 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1565 &tail);
1566
1567 /*
1568 * Now sort by symmetric encryption strength. The above ordering remains
1569 * in force within each class
1570 */
1571 if (!ssl_cipher_strength_sort(&head, &tail)) {
1572 OPENSSL_free(co_list);
1573 return NULL;
1574 }
1575
1576 /* Now disable everything (maintaining the ordering!) */
1577 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1578
1579 /*
1580 * We also need cipher aliases for selecting based on the rule_str.
1581 * There might be two types of entries in the rule_str: 1) names
1582 * of ciphers themselves 2) aliases for groups of ciphers.
1583 * For 1) we need the available ciphers and for 2) the cipher
1584 * groups of cipher_aliases added together in one list (otherwise
1585 * we would be happy with just the cipher_aliases table).
1586 */
1587 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1588 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1589 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1590 if (ca_list == NULL) {
1591 OPENSSL_free(co_list);
1592 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1593 return (NULL); /* Failure */
1594 }
1595 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1596 disabled_mkey, disabled_auth, disabled_enc,
1597 disabled_mac, disabled_ssl, head);
1598
1599 /*
1600 * If the rule_string begins with DEFAULT, apply the default rule
1601 * before using the (possibly available) additional rules.
1602 */
1603 ok = 1;
1604 rule_p = rule_str;
1605 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1606 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1607 &head, &tail, ca_list);
1608 rule_p += 7;
1609 if (*rule_p == ':')
1610 rule_p++;
1611 }
1612
1613 if (ok && (strlen(rule_p) > 0))
1614 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1615
1616 OPENSSL_free((void *)ca_list); /* Not needed anymore */
1617
1618 if (!ok) { /* Rule processing failure */
1619 OPENSSL_free(co_list);
1620 return (NULL);
1621 }
1622
1623 /*
1624 * Allocate new "cipherstack" for the result, return with error
1625 * if we cannot get one.
1626 */
1627 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1628 OPENSSL_free(co_list);
1629 return (NULL);
1630 }
1631
1632 /*
1633 * The cipher selection for the list is done. The ciphers are added
1634 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1635 */
1636 for (curr = head; curr != NULL; curr = curr->next) {
1637 #ifdef OPENSSL_FIPS
1638 if (curr->active
1639 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1640 #else
1641 if (curr->active)
1642 #endif
1643 {
1644 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1645 #ifdef CIPHER_DEBUG
1646 fprintf(stderr, "<%s>\n", curr->cipher->name);
1647 #endif
1648 }
1649 }
1650 OPENSSL_free(co_list); /* Not needed any longer */
1651
1652 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1653 if (tmp_cipher_list == NULL) {
1654 sk_SSL_CIPHER_free(cipherstack);
1655 return NULL;
1656 }
1657 if (*cipher_list != NULL)
1658 sk_SSL_CIPHER_free(*cipher_list);
1659 *cipher_list = cipherstack;
1660 if (*cipher_list_by_id != NULL)
1661 sk_SSL_CIPHER_free(*cipher_list_by_id);
1662 *cipher_list_by_id = tmp_cipher_list;
1663 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,
1664 ssl_cipher_ptr_id_cmp);
1665
1666 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1667 return (cipherstack);
1668 }
1669
SSL_CIPHER_description(const SSL_CIPHER * cipher,char * buf,int len)1670 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1671 {
1672 int is_export, pkl, kl;
1673 const char *ver, *exp_str;
1674 const char *kx, *au, *enc, *mac;
1675 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2;
1676 #ifdef KSSL_DEBUG
1677 static const char *format =
1678 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1679 #else
1680 static const char *format =
1681 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1682 #endif /* KSSL_DEBUG */
1683
1684 alg_mkey = cipher->algorithm_mkey;
1685 alg_auth = cipher->algorithm_auth;
1686 alg_enc = cipher->algorithm_enc;
1687 alg_mac = cipher->algorithm_mac;
1688 alg_ssl = cipher->algorithm_ssl;
1689
1690 alg2 = cipher->algorithm2;
1691
1692 is_export = SSL_C_IS_EXPORT(cipher);
1693 pkl = SSL_C_EXPORT_PKEYLENGTH(cipher);
1694 kl = SSL_C_EXPORT_KEYLENGTH(cipher);
1695 exp_str = is_export ? " export" : "";
1696
1697 if (alg_ssl & SSL_SSLV2)
1698 ver = "SSLv2";
1699 else if (alg_ssl & SSL_SSLV3)
1700 ver = "SSLv3";
1701 else if (alg_ssl & SSL_TLSV1_2)
1702 ver = "TLSv1.2";
1703 else
1704 ver = "unknown";
1705
1706 switch (alg_mkey) {
1707 case SSL_kRSA:
1708 kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA";
1709 break;
1710 case SSL_kDHr:
1711 kx = "DH/RSA";
1712 break;
1713 case SSL_kDHd:
1714 kx = "DH/DSS";
1715 break;
1716 case SSL_kKRB5:
1717 kx = "KRB5";
1718 break;
1719 case SSL_kEDH:
1720 kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH";
1721 break;
1722 case SSL_kECDHr:
1723 kx = "ECDH/RSA";
1724 break;
1725 case SSL_kECDHe:
1726 kx = "ECDH/ECDSA";
1727 break;
1728 case SSL_kEECDH:
1729 kx = "ECDH";
1730 break;
1731 case SSL_kPSK:
1732 kx = "PSK";
1733 break;
1734 case SSL_kSRP:
1735 kx = "SRP";
1736 break;
1737 case SSL_kGOST:
1738 kx = "GOST";
1739 break;
1740 default:
1741 kx = "unknown";
1742 }
1743
1744 switch (alg_auth) {
1745 case SSL_aRSA:
1746 au = "RSA";
1747 break;
1748 case SSL_aDSS:
1749 au = "DSS";
1750 break;
1751 case SSL_aDH:
1752 au = "DH";
1753 break;
1754 case SSL_aKRB5:
1755 au = "KRB5";
1756 break;
1757 case SSL_aECDH:
1758 au = "ECDH";
1759 break;
1760 case SSL_aNULL:
1761 au = "None";
1762 break;
1763 case SSL_aECDSA:
1764 au = "ECDSA";
1765 break;
1766 case SSL_aPSK:
1767 au = "PSK";
1768 break;
1769 case SSL_aSRP:
1770 au = "SRP";
1771 break;
1772 case SSL_aGOST94:
1773 au = "GOST94";
1774 break;
1775 case SSL_aGOST01:
1776 au = "GOST01";
1777 break;
1778 default:
1779 au = "unknown";
1780 break;
1781 }
1782
1783 switch (alg_enc) {
1784 case SSL_DES:
1785 enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)";
1786 break;
1787 case SSL_3DES:
1788 enc = "3DES(168)";
1789 break;
1790 case SSL_RC4:
1791 enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)")
1792 : ((alg2 & SSL2_CF_8_BYTE_ENC) ? "RC4(64)" : "RC4(128)");
1793 break;
1794 case SSL_RC2:
1795 enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "RC2(128)";
1796 break;
1797 case SSL_IDEA:
1798 enc = "IDEA(128)";
1799 break;
1800 case SSL_eNULL:
1801 enc = "None";
1802 break;
1803 case SSL_AES128:
1804 enc = "AES(128)";
1805 break;
1806 case SSL_AES256:
1807 enc = "AES(256)";
1808 break;
1809 case SSL_AES128GCM:
1810 enc = "AESGCM(128)";
1811 break;
1812 case SSL_AES256GCM:
1813 enc = "AESGCM(256)";
1814 break;
1815 case SSL_CAMELLIA128:
1816 enc = "Camellia(128)";
1817 break;
1818 case SSL_CAMELLIA256:
1819 enc = "Camellia(256)";
1820 break;
1821 case SSL_SEED:
1822 enc = "SEED(128)";
1823 break;
1824 case SSL_eGOST2814789CNT:
1825 enc = "GOST89(256)";
1826 break;
1827 default:
1828 enc = "unknown";
1829 break;
1830 }
1831
1832 switch (alg_mac) {
1833 case SSL_MD5:
1834 mac = "MD5";
1835 break;
1836 case SSL_SHA1:
1837 mac = "SHA1";
1838 break;
1839 case SSL_SHA256:
1840 mac = "SHA256";
1841 break;
1842 case SSL_SHA384:
1843 mac = "SHA384";
1844 break;
1845 case SSL_AEAD:
1846 mac = "AEAD";
1847 break;
1848 case SSL_GOST89MAC:
1849 mac = "GOST89";
1850 break;
1851 case SSL_GOST94:
1852 mac = "GOST94";
1853 break;
1854 default:
1855 mac = "unknown";
1856 break;
1857 }
1858
1859 if (buf == NULL) {
1860 len = 128;
1861 buf = OPENSSL_malloc(len);
1862 if (buf == NULL)
1863 return ("OPENSSL_malloc Error");
1864 } else if (len < 128)
1865 return ("Buffer too small");
1866
1867 #ifdef KSSL_DEBUG
1868 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1869 exp_str, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl);
1870 #else
1871 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1872 exp_str);
1873 #endif /* KSSL_DEBUG */
1874 return (buf);
1875 }
1876
SSL_CIPHER_get_version(const SSL_CIPHER * c)1877 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1878 {
1879 int i;
1880
1881 if (c == NULL)
1882 return ("(NONE)");
1883 i = (int)(c->id >> 24L);
1884 if (i == 3)
1885 return ("TLSv1/SSLv3");
1886 else if (i == 2)
1887 return ("SSLv2");
1888 else
1889 return ("unknown");
1890 }
1891
1892 /* return the actual cipher being used */
SSL_CIPHER_get_name(const SSL_CIPHER * c)1893 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1894 {
1895 if (c != NULL)
1896 return (c->name);
1897 return ("(NONE)");
1898 }
1899
1900 /* number of bits for symmetric cipher */
SSL_CIPHER_get_bits(const SSL_CIPHER * c,int * alg_bits)1901 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1902 {
1903 int ret = 0;
1904
1905 if (c != NULL) {
1906 if (alg_bits != NULL)
1907 *alg_bits = c->alg_bits;
1908 ret = c->strength_bits;
1909 }
1910 return (ret);
1911 }
1912
SSL_CIPHER_get_id(const SSL_CIPHER * c)1913 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1914 {
1915 return c->id;
1916 }
1917
ssl3_comp_find(STACK_OF (SSL_COMP)* sk,int n)1918 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1919 {
1920 SSL_COMP *ctmp;
1921 int i, nn;
1922
1923 if ((n == 0) || (sk == NULL))
1924 return (NULL);
1925 nn = sk_SSL_COMP_num(sk);
1926 for (i = 0; i < nn; i++) {
1927 ctmp = sk_SSL_COMP_value(sk, i);
1928 if (ctmp->id == n)
1929 return (ctmp);
1930 }
1931 return (NULL);
1932 }
1933
1934 #ifdef OPENSSL_NO_COMP
SSL_COMP_get_compression_methods(void)1935 void *SSL_COMP_get_compression_methods(void)
1936 {
1937 return NULL;
1938 }
1939
SSL_COMP_add_compression_method(int id,void * cm)1940 int SSL_COMP_add_compression_method(int id, void *cm)
1941 {
1942 return 1;
1943 }
1944
SSL_COMP_get_name(const void * comp)1945 const char *SSL_COMP_get_name(const void *comp)
1946 {
1947 return NULL;
1948 }
1949 #else
STACK_OF(SSL_COMP)1950 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1951 {
1952 load_builtin_compressions();
1953 return (ssl_comp_methods);
1954 }
1955
STACK_OF(SSL_COMP)1956 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1957 *meths)
1958 {
1959 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1960 ssl_comp_methods = meths;
1961 return old_meths;
1962 }
1963
cmeth_free(SSL_COMP * cm)1964 static void cmeth_free(SSL_COMP *cm)
1965 {
1966 OPENSSL_free(cm);
1967 }
1968
SSL_COMP_free_compression_methods(void)1969 void SSL_COMP_free_compression_methods(void)
1970 {
1971 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1972 ssl_comp_methods = NULL;
1973 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1974 }
1975
SSL_COMP_add_compression_method(int id,COMP_METHOD * cm)1976 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1977 {
1978 SSL_COMP *comp;
1979
1980 if (cm == NULL || cm->type == NID_undef)
1981 return 1;
1982
1983 /*-
1984 * According to draft-ietf-tls-compression-04.txt, the
1985 * compression number ranges should be the following:
1986 *
1987 * 0 to 63: methods defined by the IETF
1988 * 64 to 192: external party methods assigned by IANA
1989 * 193 to 255: reserved for private use
1990 */
1991 if (id < 193 || id > 255) {
1992 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1993 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1994 return 0;
1995 }
1996
1997 MemCheck_off();
1998 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1999 comp->id = id;
2000 comp->method = cm;
2001 load_builtin_compressions();
2002 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
2003 OPENSSL_free(comp);
2004 MemCheck_on();
2005 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
2006 SSL_R_DUPLICATE_COMPRESSION_ID);
2007 return (1);
2008 } else if ((ssl_comp_methods == NULL)
2009 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
2010 OPENSSL_free(comp);
2011 MemCheck_on();
2012 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
2013 return (1);
2014 } else {
2015 MemCheck_on();
2016 return (0);
2017 }
2018 }
2019
SSL_COMP_get_name(const COMP_METHOD * comp)2020 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2021 {
2022 if (comp)
2023 return comp->name;
2024 return NULL;
2025 }
2026 #endif
2027 /* For a cipher return the index corresponding to the certificate type */
ssl_cipher_get_cert_index(const SSL_CIPHER * c)2028 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
2029 {
2030 unsigned long alg_k, alg_a;
2031
2032 alg_k = c->algorithm_mkey;
2033 alg_a = c->algorithm_auth;
2034
2035 if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
2036 /*
2037 * we don't need to look at SSL_kEECDH since no certificate is needed
2038 * for anon ECDH and for authenticated EECDH, the check for the auth
2039 * algorithm will set i correctly NOTE: For ECDH-RSA, we need an ECC
2040 * not an RSA cert but for EECDH-RSA we need an RSA cert. Placing the
2041 * checks for SSL_kECDH before RSA checks ensures the correct cert is
2042 * chosen.
2043 */
2044 return SSL_PKEY_ECC;
2045 } else if (alg_a & SSL_aECDSA)
2046 return SSL_PKEY_ECC;
2047 else if (alg_k & SSL_kDHr)
2048 return SSL_PKEY_DH_RSA;
2049 else if (alg_k & SSL_kDHd)
2050 return SSL_PKEY_DH_DSA;
2051 else if (alg_a & SSL_aDSS)
2052 return SSL_PKEY_DSA_SIGN;
2053 else if (alg_a & SSL_aRSA)
2054 return SSL_PKEY_RSA_ENC;
2055 else if (alg_a & SSL_aKRB5)
2056 /* VRS something else here? */
2057 return -1;
2058 else if (alg_a & SSL_aGOST94)
2059 return SSL_PKEY_GOST94;
2060 else if (alg_a & SSL_aGOST01)
2061 return SSL_PKEY_GOST01;
2062 return -1;
2063 }
2064
ssl_get_cipher_by_char(SSL * ssl,const unsigned char * ptr)2065 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2066 {
2067 const SSL_CIPHER *c;
2068 c = ssl->method->get_cipher_by_char(ptr);
2069 if (c == NULL || c->valid == 0)
2070 return NULL;
2071 return c;
2072 }
2073
SSL_CIPHER_find(SSL * ssl,const unsigned char * ptr)2074 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2075 {
2076 return ssl->method->get_cipher_by_char(ptr);
2077 }
2078