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d02b48c6 1/* ssl/ssl_ciph.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE		 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.
ae5c8664 8 *
d02b48c6
RE		 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).
ae5c8664 15 *
d02b48c6
RE		 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.
ae5c8664 22 *
d02b48c6
RE		 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 :-).
ae5c8664 37 * 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6
RE		 38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
ae5c8664 40 *
d02b48c6
RE		 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.
ae5c8664 52 *
d02b48c6
RE		 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 */
675f605d 58/* ====================================================================
52b8dad8 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
675f605d
BM		 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
ae5c8664 66 * notice, this list of conditions and the following disclaimer.
675f605d
BM		 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 */
ea262260
BM		 111/* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
ae5c8664 113 * ECC cipher suite support in OpenSSL originally developed by
ea262260
BM		 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
ddac1974
NL		 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
d02b48c6 143#include <stdio.h>
ec577822 144#include <openssl/objects.h>
fceac0bc 145#ifndef OPENSSL_NO_COMP
ae5c8664 146# include <openssl/comp.h>
fceac0bc 147#endif
70531c14 148#ifndef OPENSSL_NO_ENGINE
ae5c8664 149# include <openssl/engine.h>
70531c14 150#endif
d02b48c6
RE		 151#include "ssl_locl.h"
152
ae5c8664
MC		 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
169static 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
178static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
179
180#define SSL_MD_MD5_IDX 0
181#define SSL_MD_SHA1_IDX 1
b948e2c5
DSH		 182#define SSL_MD_GOST94_IDX 2
183#define SSL_MD_GOST89MAC_IDX 3
9472baae 184#define SSL_MD_SHA256_IDX 4
c8c6e9ec 185#define SSL_MD_SHA384_IDX 5
ae5c8664
MC		 186/*
187 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
188 * in the ssl_locl.h
b948e2c5 189 */
ae5c8664
MC		 190#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
191static 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 */
200static 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
205static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
206 0, 0, 0, 0, 0, 0
207};
208
209static 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
221typedef 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
228static 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, SSL_kEDH | SSL_kEECDH, SSL_aNULL, ~SSL_eNULL, 0, 0,
239 0, 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
81025661 371 */
70531c14
DSH		 372#ifdef OPENSSL_NO_ENGINE
373
81025661 374static int get_optional_pkey_id(const char *pkey_name)
ae5c8664
MC		 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) {
380 EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
381 }
382 return pkey_id;
383}
d02b48c6 384
70531c14
DSH		 385#else
386
387static int get_optional_pkey_id(const char *pkey_name)
ae5c8664
MC		 388{
389 const EVP_PKEY_ASN1_METHOD *ameth;
390 ENGINE *tmpeng = NULL;
391 int pkey_id = 0;
392 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
393 if (ameth) {
394 EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, ameth);
395 }
396 if (tmpeng)
397 ENGINE_finish(tmpeng);
398 return pkey_id;
399}
70531c14
DSH		 400
401#endif
402
7f3c9036 403void ssl_load_ciphers(void)
ae5c8664
MC		 404{
405 ssl_cipher_methods[SSL_ENC_DES_IDX] = EVP_get_cipherbyname(SN_des_cbc);
406 ssl_cipher_methods[SSL_ENC_3DES_IDX] =
407 EVP_get_cipherbyname(SN_des_ede3_cbc);
408 ssl_cipher_methods[SSL_ENC_RC4_IDX] = EVP_get_cipherbyname(SN_rc4);
409 ssl_cipher_methods[SSL_ENC_RC2_IDX] = EVP_get_cipherbyname(SN_rc2_cbc);
5fdf0666 410#ifndef OPENSSL_NO_IDEA
ae5c8664 411 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = EVP_get_cipherbyname(SN_idea_cbc);
5fdf0666 412#else
ae5c8664 413 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL;
5fdf0666 414#endif
ae5c8664
MC		 415 ssl_cipher_methods[SSL_ENC_AES128_IDX] =
416 EVP_get_cipherbyname(SN_aes_128_cbc);
417 ssl_cipher_methods[SSL_ENC_AES256_IDX] =
418 EVP_get_cipherbyname(SN_aes_256_cbc);
419 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] =
420 EVP_get_cipherbyname(SN_camellia_128_cbc);
421 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] =
422 EVP_get_cipherbyname(SN_camellia_256_cbc);
423 ssl_cipher_methods[SSL_ENC_GOST89_IDX] =
424 EVP_get_cipherbyname(SN_gost89_cnt);
425 ssl_cipher_methods[SSL_ENC_SEED_IDX] = EVP_get_cipherbyname(SN_seed_cbc);
426
427 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] =
428 EVP_get_cipherbyname(SN_aes_128_gcm);
429 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] =
430 EVP_get_cipherbyname(SN_aes_256_gcm);
431
432 ssl_digest_methods[SSL_MD_MD5_IDX] = EVP_get_digestbyname(SN_md5);
433 ssl_mac_secret_size[SSL_MD_MD5_IDX] =
434 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
435 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
436 ssl_digest_methods[SSL_MD_SHA1_IDX] = EVP_get_digestbyname(SN_sha1);
437 ssl_mac_secret_size[SSL_MD_SHA1_IDX] =
438 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
439 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
440 ssl_digest_methods[SSL_MD_GOST94_IDX] =
441 EVP_get_digestbyname(SN_id_GostR3411_94);
442 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) {
443 ssl_mac_secret_size[SSL_MD_GOST94_IDX] =
444 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
445 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
446 }
447 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] =
448 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
449 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
450 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
451 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
452 }
453
454 ssl_digest_methods[SSL_MD_SHA256_IDX] = EVP_get_digestbyname(SN_sha256);
455 ssl_mac_secret_size[SSL_MD_SHA256_IDX] =
456 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
457 ssl_digest_methods[SSL_MD_SHA384_IDX] = EVP_get_digestbyname(SN_sha384);
458 ssl_mac_secret_size[SSL_MD_SHA384_IDX] =
459 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
460}
461
09b6c2ef
DSH		 462#ifndef OPENSSL_NO_COMP
463
ae5c8664
MC		 464static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
465{
466 return ((*a)->id - (*b)->id);
467}
7ba666fa
RL		 468
469static void load_builtin_compressions(void)
ae5c8664
MC		 470{
471 int got_write_lock = 0;
472
473 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
474 if (ssl_comp_methods == NULL) {
475 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
476 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
477 got_write_lock = 1;
478
479 if (ssl_comp_methods == NULL) {
480 SSL_COMP *comp = NULL;
481
482 MemCheck_off();
483 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
484 if (ssl_comp_methods != NULL) {
485 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
486 if (comp != NULL) {
487 comp->method = COMP_zlib();
488 if (comp->method && comp->method->type == NID_undef)
489 OPENSSL_free(comp);
490 else {
491 comp->id = SSL_COMP_ZLIB_IDX;
492 comp->name = comp->method->name;
493 sk_SSL_COMP_push(ssl_comp_methods, comp);
494 }
495 }
496 sk_SSL_COMP_sort(ssl_comp_methods);
497 }
498 MemCheck_on();
499 }
500 }
501
502 if (got_write_lock)
503 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
504 else
505 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
506}
09b6c2ef 507#endif
7ba666fa 508
0821bcd4 509int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
ae5c8664
MC		 510 const EVP_MD **md, int *mac_pkey_type,
511 int *mac_secret_size, SSL_COMP **comp)
512{
513 int i;
514 const SSL_CIPHER *c;
515
516 c = s->cipher;
517 if (c == NULL)
518 return (0);
519 if (comp != NULL) {
520 SSL_COMP ctmp;
09b6c2ef 521#ifndef OPENSSL_NO_COMP
ae5c8664 522 load_builtin_compressions();
09b6c2ef 523#endif
413c4f45 524
ae5c8664
MC		 525 *comp = NULL;
526 ctmp.id = s->compress_meth;
527 if (ssl_comp_methods != NULL) {
528 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
529 if (i >= 0)
530 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
531 else
532 *comp = NULL;
533 }
534 }
535
536 if ((enc == NULL) || (md == NULL))
537 return (0);
538
539 switch (c->algorithm_enc) {
540 case SSL_DES:
541 i = SSL_ENC_DES_IDX;
542 break;
543 case SSL_3DES:
544 i = SSL_ENC_3DES_IDX;
545 break;
546 case SSL_RC4:
547 i = SSL_ENC_RC4_IDX;
548 break;
549 case SSL_RC2:
550 i = SSL_ENC_RC2_IDX;
551 break;
552 case SSL_IDEA:
553 i = SSL_ENC_IDEA_IDX;
554 break;
555 case SSL_eNULL:
556 i = SSL_ENC_NULL_IDX;
557 break;
558 case SSL_AES128:
559 i = SSL_ENC_AES128_IDX;
560 break;
561 case SSL_AES256:
562 i = SSL_ENC_AES256_IDX;
563 break;
564 case SSL_CAMELLIA128:
565 i = SSL_ENC_CAMELLIA128_IDX;
566 break;
567 case SSL_CAMELLIA256:
568 i = SSL_ENC_CAMELLIA256_IDX;
569 break;
570 case SSL_eGOST2814789CNT:
571 i = SSL_ENC_GOST89_IDX;
572 break;
573 case SSL_SEED:
574 i = SSL_ENC_SEED_IDX;
575 break;
576 case SSL_AES128GCM:
577 i = SSL_ENC_AES128GCM_IDX;
578 break;
579 case SSL_AES256GCM:
580 i = SSL_ENC_AES256GCM_IDX;
581 break;
582 default:
583 i = -1;
584 break;
585 }
586
587 if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
588 *enc = NULL;
589 else {
590 if (i == SSL_ENC_NULL_IDX)
591 *enc = EVP_enc_null();
592 else
593 *enc = ssl_cipher_methods[i];
594 }
595
596 switch (c->algorithm_mac) {
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 *md = NULL;
621 if (mac_pkey_type != NULL)
622 *mac_pkey_type = NID_undef;
623 if (mac_secret_size != NULL)
624 *mac_secret_size = 0;
625 if (c->algorithm_mac == SSL_AEAD)
626 mac_pkey_type = NULL;
627 } else {
628 *md = ssl_digest_methods[i];
629 if (mac_pkey_type != NULL)
630 *mac_pkey_type = ssl_mac_pkey_id[i];
631 if (mac_secret_size != NULL)
632 *mac_secret_size = ssl_mac_secret_size[i];
633 }
634
635 if ((*enc != NULL) &&
636 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
637 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
638 const EVP_CIPHER *evp;
639
640 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
641 s->ssl_version < TLS1_VERSION)
642 return 1;
1b0ae81f 643
a56f9a61 644#ifdef OPENSSL_FIPS
ae5c8664
MC		 645 if (FIPS_mode())
646 return 1;
a56f9a61
DSH		 647#endif
648
ae5c8664
MC		 649 if (c->algorithm_enc == SSL_RC4 &&
650 c->algorithm_mac == SSL_MD5 &&
651 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
652 *enc = evp, *md = NULL;
653 else if (c->algorithm_enc == SSL_AES128 &&
654 c->algorithm_mac == SSL_SHA1 &&
655 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
656 *enc = evp, *md = NULL;
657 else if (c->algorithm_enc == SSL_AES256 &&
658 c->algorithm_mac == SSL_SHA1 &&
659 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
660 *enc = evp, *md = NULL;
661 else if (c->algorithm_enc == SSL_AES128 &&
662 c->algorithm_mac == SSL_SHA256 &&
663 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
664 *enc = evp, *md = NULL;
665 else if (c->algorithm_enc == SSL_AES256 &&
666 c->algorithm_mac == SSL_SHA256 &&
667 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
668 *enc = evp, *md = NULL;
669 return (1);
670 } else
671 return (0);
672}
673
674int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
81025661 675{
ae5c8664
MC		 676 if (idx < 0 || idx >= SSL_MD_NUM_IDX) {
677 return 0;
678 }
679 *mask = ssl_handshake_digest_flag[idx];
680 if (*mask)
681 *md = ssl_digest_methods[idx];
682 else
683 *md = NULL;
684 return 1;
81025661
DSH		 685}
686
58964a49 687#define ITEM_SEP(a) \
ae5c8664 688 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
58964a49 689
6b691a5c 690static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
ae5c8664
MC		 691 CIPHER_ORDER **tail)
692{
693 if (curr == *tail)
694 return;
695 if (curr == *head)
696 *head = curr->next;
697 if (curr->prev != NULL)
698 curr->prev->next = curr->next;
699 if (curr->next != NULL)
700 curr->next->prev = curr->prev;
701 (*tail)->next = curr;
702 curr->prev = *tail;
703 curr->next = NULL;
704 *tail = curr;
705}
58964a49 706
fd5bc65c 707static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
ae5c8664
MC		 708 CIPHER_ORDER **tail)
709{
710 if (curr == *head)
711 return;
712 if (curr == *tail)
713 *tail = curr->prev;
714 if (curr->next != NULL)
715 curr->next->prev = curr->prev;
716 if (curr->prev != NULL)
717 curr->prev->next = curr->next;
718 (*head)->prev = curr;
719 curr->next = *head;
720 curr->prev = NULL;
721 *head = curr;
722}
723
724static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth,
725 unsigned long *enc, unsigned long *mac,
726 unsigned long *ssl)
727{
728 *mkey = 0;
729 *auth = 0;
730 *enc = 0;
731 *mac = 0;
732 *ssl = 0;
d02b48c6 733
bc36ee62 734#ifdef OPENSSL_NO_RSA
ae5c8664
MC		 735 *mkey |= SSL_kRSA;
736 *auth |= SSL_aRSA;
d02b48c6 737#endif
bc36ee62 738#ifdef OPENSSL_NO_DSA
ae5c8664 739 *auth |= SSL_aDSS;
d02b48c6 740#endif
bc36ee62 741#ifdef OPENSSL_NO_DH
ae5c8664
MC		 742 *mkey |= SSL_kDHr | SSL_kDHd | SSL_kEDH;
743 *auth |= SSL_aDH;
d02b48c6 744#endif
bc36ee62 745#ifdef OPENSSL_NO_KRB5
ae5c8664
MC		 746 *mkey |= SSL_kKRB5;
747 *auth |= SSL_aKRB5;
f9b3bff6 748#endif
89bbe14c 749#ifdef OPENSSL_NO_ECDSA
ae5c8664 750 *auth |= SSL_aECDSA;
89bbe14c 751#endif
ea262260 752#ifdef OPENSSL_NO_ECDH
ae5c8664
MC		 753 *mkey |= SSL_kECDHe | SSL_kECDHr;
754 *auth |= SSL_aECDH;
ea262260 755#endif
ddac1974 756#ifdef OPENSSL_NO_PSK
ae5c8664
MC		 757 *mkey |= SSL_kPSK;
758 *auth |= SSL_aPSK;
a149b246
BL		 759#endif
760#ifdef OPENSSL_NO_SRP
ae5c8664 761 *mkey |= SSL_kSRP;
ddac1974 762#endif
ae5c8664
MC		 763 /*
764 * Check for presence of GOST 34.10 algorithms, and if they do not
765 * present, disable appropriate auth and key exchange
766 */
767 if (!get_optional_pkey_id("gost94")) {
768 *auth |= SSL_aGOST94;
769 }
770 if (!get_optional_pkey_id("gost2001")) {
771 *auth |= SSL_aGOST01;
772 }
773 /*
774 * Disable GOST key exchange if no GOST signature algs are available *
775 */
776 if ((*auth & (SSL_aGOST94 | SSL_aGOST01)) == (SSL_aGOST94 | SSL_aGOST01)) {
777 *mkey |= SSL_kGOST;
778 }
988788f6 779#ifdef SSL_FORBID_ENULL
ae5c8664 780 *enc |= SSL_eNULL;
d02b48c6 781#endif
ae5c8664
MC		 782
783 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX] == NULL) ? SSL_DES : 0;
784 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0;
785 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX] == NULL) ? SSL_RC4 : 0;
786 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX] == NULL) ? SSL_RC2 : 0;
787 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0;
788 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0;
789 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0;
790 *enc |=
791 (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] ==
792 NULL) ? SSL_AES128GCM : 0;
793 *enc |=
794 (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] ==
795 NULL) ? SSL_AES256GCM : 0;
796 *enc |=
797 (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] ==
798 NULL) ? SSL_CAMELLIA128 : 0;
799 *enc |=
800 (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] ==
801 NULL) ? SSL_CAMELLIA256 : 0;
802 *enc |=
803 (ssl_cipher_methods[SSL_ENC_GOST89_IDX] ==
804 NULL) ? SSL_eGOST2814789CNT : 0;
805 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED : 0;
806
807 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX] == NULL) ? SSL_MD5 : 0;
808 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0;
809 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0;
810 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0;
811 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0;
812 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL
813 || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] ==
814 NID_undef) ? SSL_GOST89MAC : 0;
815
816}
018e57c7
DSH		 817
818static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
ae5c8664
MC		 819 int num_of_ciphers,
820 unsigned long disabled_mkey,
821 unsigned long disabled_auth,
822 unsigned long disabled_enc,
823 unsigned long disabled_mac,
824 unsigned long disabled_ssl,
825 CIPHER_ORDER *co_list,
826 CIPHER_ORDER **head_p,
827 CIPHER_ORDER **tail_p)
828{
829 int i, co_list_num;
830 const SSL_CIPHER *c;
831
832 /*
833 * We have num_of_ciphers descriptions compiled in, depending on the
834 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
835 * These will later be sorted in a linked list with at most num
836 * entries.
837 */
838
839 /* Get the initial list of ciphers */
840 co_list_num = 0; /* actual count of ciphers */
841 for (i = 0; i < num_of_ciphers; i++) {
842 c = ssl_method->get_cipher(i);
843 /* drop those that use any of that is not available */
844 if ((c != NULL) && c->valid &&
7043fa70 845#ifdef OPENSSL_FIPS
ae5c8664 846 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
7043fa70 847#endif
ae5c8664
MC		 848 !(c->algorithm_mkey & disabled_mkey) &&
849 !(c->algorithm_auth & disabled_auth) &&
850 !(c->algorithm_enc & disabled_enc) &&
851 !(c->algorithm_mac & disabled_mac) &&
852 !(c->algorithm_ssl & disabled_ssl)) {
853 co_list[co_list_num].cipher = c;
854 co_list[co_list_num].next = NULL;
855 co_list[co_list_num].prev = NULL;
856 co_list[co_list_num].active = 0;
857 co_list_num++;
f9b3bff6 858#ifdef KSSL_DEBUG
ae5c8664
MC		 859 fprintf(stderr, "\t%d: %s %lx %lx %lx\n", i, c->name, c->id,
860 c->algorithm_mkey, c->algorithm_auth);
861#endif /* KSSL_DEBUG */
862 /*
863 * if (!sk_push(ca_list,(char *)c)) goto err;
864 */
865 }
866 }
867
868 /*
869 * Prepare linked list from list entries
870 */
871 if (co_list_num > 0) {
872 co_list[0].prev = NULL;
873
874 if (co_list_num > 1) {
875 co_list[0].next = &co_list[1];
876
877 for (i = 1; i < co_list_num - 1; i++) {
878 co_list[i].prev = &co_list[i - 1];
879 co_list[i].next = &co_list[i + 1];
880 }
881
882 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
883 }
884
885 co_list[co_list_num - 1].next = NULL;
886
887 *head_p = &co_list[0];
888 *tail_p = &co_list[co_list_num - 1];
889 }
890}
d02b48c6 891
babb3798 892static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
ae5c8664
MC		 893 int num_of_group_aliases,
894 unsigned long disabled_mkey,
895 unsigned long disabled_auth,
896 unsigned long disabled_enc,
897 unsigned long disabled_mac,
898 unsigned long disabled_ssl,
899 CIPHER_ORDER *head)
900{
901 CIPHER_ORDER *ciph_curr;
902 const SSL_CIPHER **ca_curr;
903 int i;
904 unsigned long mask_mkey = ~disabled_mkey;
905 unsigned long mask_auth = ~disabled_auth;
906 unsigned long mask_enc = ~disabled_enc;
907 unsigned long mask_mac = ~disabled_mac;
908 unsigned long mask_ssl = ~disabled_ssl;
909
910 /*
911 * First, add the real ciphers as already collected
912 */
913 ciph_curr = head;
914 ca_curr = ca_list;
915 while (ciph_curr != NULL) {
916 *ca_curr = ciph_curr->cipher;
917 ca_curr++;
918 ciph_curr = ciph_curr->next;
919 }
920
921 /*
922 * Now we add the available ones from the cipher_aliases[] table.
923 * They represent either one or more algorithms, some of which
924 * in any affected category must be supported (set in enabled_mask),
925 * or represent a cipher strength value (will be added in any case because algorithms=0).
926 */
927 for (i = 0; i < num_of_group_aliases; i++) {
928 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
929 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
930 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
931 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
932 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
933
934 if (algorithm_mkey)
935 if ((algorithm_mkey & mask_mkey) == 0)
936 continue;
937
938 if (algorithm_auth)
939 if ((algorithm_auth & mask_auth) == 0)
940 continue;
941
942 if (algorithm_enc)
943 if ((algorithm_enc & mask_enc) == 0)
944 continue;
945
946 if (algorithm_mac)
947 if ((algorithm_mac & mask_mac) == 0)
948 continue;
949
950 if (algorithm_ssl)
951 if ((algorithm_ssl & mask_ssl) == 0)
952 continue;
953
954 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
955 ca_curr++;
956 }
957
958 *ca_curr = NULL; /* end of list */
959}
d02b48c6 960
52b8dad8 961static void ssl_cipher_apply_rule(unsigned long cipher_id,
ae5c8664
MC		 962 unsigned long alg_mkey,
963 unsigned long alg_auth,
964 unsigned long alg_enc,
965 unsigned long alg_mac,
966 unsigned long alg_ssl,
967 unsigned long algo_strength, int rule,
968 int strength_bits, CIPHER_ORDER **head_p,
969 CIPHER_ORDER **tail_p)
970{
971 CIPHER_ORDER *head, *tail, *curr, *next, *last;
972 const SSL_CIPHER *cp;
973 int reverse = 0;
018e57c7
DSH		 974
975#ifdef CIPHER_DEBUG
ae5c8664
MC		 976 fprintf(stderr,
977 "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
978 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
979 algo_strength, strength_bits);
018e57c7 980#endif
d02b48c6 981
ae5c8664
MC		 982 if (rule == CIPHER_DEL)
983 reverse = 1; /* needed to maintain sorting between
984 * currently deleted ciphers */
985
986 head = *head_p;
987 tail = *tail_p;
988
989 if (reverse) {
990 next = tail;
991 last = head;
992 } else {
993 next = head;
994 last = tail;
995 }
996
997 curr = NULL;
998 for (;;) {
999 if (curr == last)
1000 break;
1001
1002 curr = next;
1003
1004 if (curr == NULL)
1005 break;
1006
1007 next = reverse ? curr->prev : curr->next;
1008
1009 cp = curr->cipher;
1010
1011 /*
1012 * Selection criteria is either the value of strength_bits
1013 * or the algorithms used.
1014 */
1015 if (strength_bits >= 0) {
1016 if (strength_bits != cp->strength_bits)
1017 continue;
1018 } else {
018e57c7 1019#ifdef CIPHER_DEBUG
ae5c8664
MC		 1020 fprintf(stderr,
1021 "\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n",
1022 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
1023 cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl,
1024 cp->algo_strength);
018e57c7 1025#endif
50b5966e 1026#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
ae5c8664
MC		 1027 if (cipher_id && cipher_id != cp->id)
1028 continue;
50b5966e 1029#endif
ae5c8664
MC		 1030 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1031 continue;
1032 if (alg_auth && !(alg_auth & cp->algorithm_auth))
1033 continue;
1034 if (alg_enc && !(alg_enc & cp->algorithm_enc))
1035 continue;
1036 if (alg_mac && !(alg_mac & cp->algorithm_mac))
1037 continue;
1038 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1039 continue;
1040 if ((algo_strength & SSL_EXP_MASK)
1041 && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1042 continue;
1043 if ((algo_strength & SSL_STRONG_MASK)
1044 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1045 continue;
1046 }
018e57c7
DSH		 1047
1048#ifdef CIPHER_DEBUG
ae5c8664 1049 fprintf(stderr, "Action = %d\n", rule);
018e57c7
DSH		 1050#endif
1051
ae5c8664
MC		 1052 /* add the cipher if it has not been added yet. */
1053 if (rule == CIPHER_ADD) {
1054 /* reverse == 0 */
1055 if (!curr->active) {
1056 ll_append_tail(&head, curr, &tail);
1057 curr->active = 1;
1058 }
1059 }
1060 /* Move the added cipher to this location */
1061 else if (rule == CIPHER_ORD) {
1062 /* reverse == 0 */
1063 if (curr->active) {
1064 ll_append_tail(&head, curr, &tail);
1065 }
1066 } else if (rule == CIPHER_DEL) {
1067 /* reverse == 1 */
1068 if (curr->active) {
1069 /*
1070 * most recently deleted ciphersuites get best positions for
1071 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
1072 * in reverse to maintain the order)
1073 */
1074 ll_append_head(&head, curr, &tail);
1075 curr->active = 0;
1076 }
1077 } else if (rule == CIPHER_KILL) {
1078 /* reverse == 0 */
1079 if (head == curr)
1080 head = curr->next;
1081 else
1082 curr->prev->next = curr->next;
1083 if (tail == curr)
1084 tail = curr->prev;
1085 curr->active = 0;
1086 if (curr->next != NULL)
1087 curr->next->prev = curr->prev;
1088 if (curr->prev != NULL)
1089 curr->prev->next = curr->next;
1090 curr->next = NULL;
1091 curr->prev = NULL;
1092 }
1093 }
1094
1095 *head_p = head;
1096 *tail_p = tail;
1097}
018e57c7 1098
a717831d 1099static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
ae5c8664
MC		 1100 CIPHER_ORDER **tail_p)
1101{
1102 int max_strength_bits, i, *number_uses;
1103 CIPHER_ORDER *curr;
1104
1105 /*
1106 * This routine sorts the ciphers with descending strength. The sorting
1107 * must keep the pre-sorted sequence, so we apply the normal sorting
1108 * routine as '+' movement to the end of the list.
1109 */
1110 max_strength_bits = 0;
1111 curr = *head_p;
1112 while (curr != NULL) {
1113 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
1114 max_strength_bits = curr->cipher->strength_bits;
1115 curr = curr->next;
1116 }
1117
1118 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1119 if (!number_uses) {
1120 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
1121 return (0);
1122 }
1123 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1124
1125 /*
1126 * Now find the strength_bits values actually used
1127 */
1128 curr = *head_p;
1129 while (curr != NULL) {
1130 if (curr->active)
1131 number_uses[curr->cipher->strength_bits]++;
1132 curr = curr->next;
1133 }
1134 /*
1135 * Go through the list of used strength_bits values in descending
1136 * order.
1137 */
1138 for (i = max_strength_bits; i >= 0; i--)
1139 if (number_uses[i] > 0)
1140 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
1141 tail_p);
1142
1143 OPENSSL_free(number_uses);
1144 return (1);
1145}
018e57c7
DSH		 1146
1147static int ssl_cipher_process_rulestr(const char *rule_str,
ae5c8664
MC		 1148 CIPHER_ORDER **head_p,
1149 CIPHER_ORDER **tail_p,
1150 const SSL_CIPHER **ca_list)
1151{
1152 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
1153 algo_strength;
1154 const char *l, *buf;
1155 int j, multi, found, rule, retval, ok, buflen;
1156 unsigned long cipher_id = 0;
1157 char ch;
1158
1159 retval = 1;
1160 l = rule_str;
1161 for (;;) {
1162 ch = *l;
1163
1164 if (ch == '\0')
1165 break; /* done */
1166 if (ch == '-') {
1167 rule = CIPHER_DEL;
1168 l++;
1169 } else if (ch == '+') {
1170 rule = CIPHER_ORD;
1171 l++;
1172 } else if (ch == '!') {
1173 rule = CIPHER_KILL;
1174 l++;
1175 } else if (ch == '@') {
1176 rule = CIPHER_SPECIAL;
1177 l++;
1178 } else {
1179 rule = CIPHER_ADD;
1180 }
1181
1182 if (ITEM_SEP(ch)) {
1183 l++;
1184 continue;
1185 }
1186
1187 alg_mkey = 0;
1188 alg_auth = 0;
1189 alg_enc = 0;
1190 alg_mac = 0;
1191 alg_ssl = 0;
1192 algo_strength = 0;
1193
1194 for (;;) {
1195 ch = *l;
1196 buf = l;
1197 buflen = 0;
ca570cfd 1198#ifndef CHARSET_EBCDIC
ae5c8664
MC		 1199 while (((ch >= 'A') && (ch <= 'Z')) ||
1200 ((ch >= '0') && (ch <= '9')) ||
1201 ((ch >= 'a') && (ch <= 'z')) || (ch == '-') || (ch == '.'))
ca570cfd 1202#else
ae5c8664 1203 while (isalnum(ch) || (ch == '-') || (ch == '.'))
ca570cfd 1204#endif
ae5c8664
MC		 1205 {
1206 ch = *(++l);
1207 buflen++;
1208 }
1209
1210 if (buflen == 0) {
1211 /*
1212 * We hit something we cannot deal with,
1213 * it is no command or separator nor
1214 * alphanumeric, so we call this an error.
1215 */
1216 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1217 SSL_R_INVALID_COMMAND);
1218 retval = found = 0;
1219 l++;
1220 break;
1221 }
1222
1223 if (rule == CIPHER_SPECIAL) {
1224 found = 0; /* unused -- avoid compiler warning */
1225 break; /* special treatment */
1226 }
1227
1228 /* check for multi-part specification */
1229 if (ch == '+') {
1230 multi = 1;
1231 l++;
1232 } else
1233 multi = 0;
1234
1235 /*
1236 * Now search for the cipher alias in the ca_list. Be careful
1237 * with the strncmp, because the "buflen" limitation
1238 * will make the rule "ADH:SOME" and the cipher
1239 * "ADH-MY-CIPHER" look like a match for buflen=3.
1240 * So additionally check whether the cipher name found
1241 * has the correct length. We can save a strlen() call:
1242 * just checking for the '\0' at the right place is
1243 * sufficient, we have to strncmp() anyway. (We cannot
1244 * use strcmp(), because buf is not '\0' terminated.)
1245 */
1246 j = found = 0;
1247 cipher_id = 0;
1248 while (ca_list[j]) {
1249 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1250 (ca_list[j]->name[buflen] == '\0')) {
1251 found = 1;
1252 break;
1253 } else
1254 j++;
1255 }
1256
1257 if (!found)
1258 break; /* ignore this entry */
1259
1260 if (ca_list[j]->algorithm_mkey) {
1261 if (alg_mkey) {
1262 alg_mkey &= ca_list[j]->algorithm_mkey;
1263 if (!alg_mkey) {
1264 found = 0;
1265 break;
1266 }
1267 } else
1268 alg_mkey = ca_list[j]->algorithm_mkey;
1269 }
1270
1271 if (ca_list[j]->algorithm_auth) {
1272 if (alg_auth) {
1273 alg_auth &= ca_list[j]->algorithm_auth;
1274 if (!alg_auth) {
1275 found = 0;
1276 break;
1277 }
1278 } else
1279 alg_auth = ca_list[j]->algorithm_auth;
1280 }
1281
1282 if (ca_list[j]->algorithm_enc) {
1283 if (alg_enc) {
1284 alg_enc &= ca_list[j]->algorithm_enc;
1285 if (!alg_enc) {
1286 found = 0;
1287 break;
1288 }
1289 } else
1290 alg_enc = ca_list[j]->algorithm_enc;
1291 }
1292
1293 if (ca_list[j]->algorithm_mac) {
1294 if (alg_mac) {
1295 alg_mac &= ca_list[j]->algorithm_mac;
1296 if (!alg_mac) {
1297 found = 0;
1298 break;
1299 }
1300 } else
1301 alg_mac = ca_list[j]->algorithm_mac;
1302 }
1303
1304 if (ca_list[j]->algo_strength & SSL_EXP_MASK) {
1305 if (algo_strength & SSL_EXP_MASK) {
1306 algo_strength &=
1307 (ca_list[j]->algo_strength & SSL_EXP_MASK) |
1308 ~SSL_EXP_MASK;
1309 if (!(algo_strength & SSL_EXP_MASK)) {
1310 found = 0;
1311 break;
1312 }
1313 } else
1314 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1315 }
1316
1317 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1318 if (algo_strength & SSL_STRONG_MASK) {
1319 algo_strength &=
1320 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1321 ~SSL_STRONG_MASK;
1322 if (!(algo_strength & SSL_STRONG_MASK)) {
1323 found = 0;
1324 break;
1325 }
1326 } else
1327 algo_strength |=
1328 ca_list[j]->algo_strength & SSL_STRONG_MASK;
1329 }
1330
1331 if (ca_list[j]->valid) {
1332 /*
1333 * explicit ciphersuite found; its protocol version does not
1334 * become part of the search pattern!
1335 */
1336
1337 cipher_id = ca_list[j]->id;
1338 } else {
1339 /*
1340 * not an explicit ciphersuite; only in this case, the
1341 * protocol version is considered part of the search pattern
1342 */
1343
1344 if (ca_list[j]->algorithm_ssl) {
1345 if (alg_ssl) {
1346 alg_ssl &= ca_list[j]->algorithm_ssl;
1347 if (!alg_ssl) {
1348 found = 0;
1349 break;
1350 }
1351 } else
1352 alg_ssl = ca_list[j]->algorithm_ssl;
1353 }
1354 }
1355
1356 if (!multi)
1357 break;
1358 }
1359
1360 /*
1361 * Ok, we have the rule, now apply it
1362 */
1363 if (rule == CIPHER_SPECIAL) { /* special command */
1364 ok = 0;
1365 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8))
1366 ok = ssl_cipher_strength_sort(head_p, tail_p);
1367 else
1368 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1369 SSL_R_INVALID_COMMAND);
1370 if (ok == 0)
1371 retval = 0;
1372 /*
1373 * We do not support any "multi" options
1374 * together with "@", so throw away the
1375 * rest of the command, if any left, until
1376 * end or ':' is found.
1377 */
1378 while ((*l != '\0') && !ITEM_SEP(*l))
1379 l++;
1380 } else if (found) {
1381 ssl_cipher_apply_rule(cipher_id,
1382 alg_mkey, alg_auth, alg_enc, alg_mac,
1383 alg_ssl, algo_strength, rule, -1, head_p,
1384 tail_p);
1385 } else {
1386 while ((*l != '\0') && !ITEM_SEP(*l))
1387 l++;
1388 }
1389 if (*l == '\0')
1390 break; /* done */
1391 }
1392
1393 return (retval);
1394}
1395
5b430cfc 1396#ifndef OPENSSL_NO_EC
ccf6a19e 1397static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
ae5c8664
MC		 1398 const char **prule_str)
1399{
1400 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1401 if (!strcmp(*prule_str, "SUITEB128"))
1402 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1403 else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1404 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1405 else if (!strcmp(*prule_str, "SUITEB128C2")) {
1406 suiteb_comb2 = 1;
1407 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1408 } else if (!strcmp(*prule_str, "SUITEB192"))
1409 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1410
1411 if (suiteb_flags) {
1412 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1413 c->cert_flags |= suiteb_flags;
1414 } else
1415 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1416
1417 if (!suiteb_flags)
1418 return 1;
1419 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1420
1421 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1422 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1423 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1424 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1425 else
1426 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1427 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1428 return 0;
1429 }
1430# ifndef OPENSSL_NO_ECDH
1431 switch (suiteb_flags) {
1432 case SSL_CERT_FLAG_SUITEB_128_LOS:
1433 if (suiteb_comb2)
1434 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1435 else
1436 *prule_str =
1437 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1438 break;
1439 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1440 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1441 break;
1442 case SSL_CERT_FLAG_SUITEB_192_LOS:
1443 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1444 break;
1445 }
1446 /* Set auto ECDH parameter determination */
1447 c->ecdh_tmp_auto = 1;
1448 return 1;
1449# else
1450 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1451 SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1452 return 0;
1453# endif
1454}
5b430cfc 1455#endif
ccf6a19e 1456
ae5c8664
MC		 1457STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1458 **cipher_list, STACK_OF(SSL_CIPHER)
1459 **cipher_list_by_id,
1460 const char *rule_str, CERT *c)
1461{
1462 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1463 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac,
1464 disabled_ssl;
1465 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1466 const char *rule_p;
1467 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1468 const SSL_CIPHER **ca_list = NULL;
1469
1470 /*
1471 * Return with error if nothing to do.
1472 */
1473 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1474 return NULL;
5b430cfc 1475#ifndef OPENSSL_NO_EC
ae5c8664
MC		 1476 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1477 return NULL;
5b430cfc 1478#endif
ccf6a19e 1479
ae5c8664
MC		 1480 /*
1481 * To reduce the work to do we only want to process the compiled
1482 * in algorithms, so we first get the mask of disabled ciphers.
1483 */
1484 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc,
1485 &disabled_mac, &disabled_ssl);
1486
1487 /*
1488 * Now we have to collect the available ciphers from the compiled
1489 * in ciphers. We cannot get more than the number compiled in, so
1490 * it is used for allocation.
1491 */
1492 num_of_ciphers = ssl_method->num_ciphers();
f9b3bff6 1493#ifdef KSSL_DEBUG
ae5c8664
MC		 1494 fprintf(stderr, "ssl_create_cipher_list() for %d ciphers\n",
1495 num_of_ciphers);
1496#endif /* KSSL_DEBUG */
1497 co_list =
1498 (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1499 if (co_list == NULL) {
1500 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1501 return (NULL); /* Failure */
1502 }
1503
1504 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1505 disabled_mkey, disabled_auth, disabled_enc,
1506 disabled_mac, disabled_ssl, co_list, &head,
1507 &tail);
1508
1509 /* Now arrange all ciphers by preference: */
1510
1511 /*
1512 * Everything else being equal, prefer ephemeral ECDH over other key
1513 * exchange mechanisms
1514 */
1515 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1516 &tail);
1517 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1518 &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,
1522 &tail);
1523
1524 /* Temporarily enable everything else for sorting */
1525 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1526
1527 /* Low priority for MD5 */
1528 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1529 &tail);
1530
1531 /*
1532 * Move anonymous ciphers to the end. Usually, these will remain
1533 * disabled. (For applications that allow them, they aren't too bad, but
1534 * we prefer authenticated ciphers.)
1535 */
1536 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1537 &tail);
1538
1539 /* Move ciphers without forward secrecy to the end */
1540 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1541 &tail);
1542 /*
1543 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
1544 * &head, &tail);
1545 */
1546 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1547 &tail);
1548 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1549 &tail);
1550 ssl_cipher_apply_rule(0, SSL_kKRB5, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1551 &tail);
1552
1553 /* RC4 is sort-of broken -- move the the end */
1554 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1555 &tail);
1556
1557 /*
1558 * Now sort by symmetric encryption strength. The above ordering remains
1559 * in force within each class
1560 */
1561 if (!ssl_cipher_strength_sort(&head, &tail)) {
1562 OPENSSL_free(co_list);
1563 return NULL;
1564 }
1565
1566 /* Now disable everything (maintaining the ordering!) */
1567 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1568
1569 /*
1570 * We also need cipher aliases for selecting based on the rule_str.
1571 * There might be two types of entries in the rule_str: 1) names
1572 * of ciphers themselves 2) aliases for groups of ciphers.
1573 * For 1) we need the available ciphers and for 2) the cipher
1574 * groups of cipher_aliases added together in one list (otherwise
1575 * we would be happy with just the cipher_aliases table).
1576 */
1577 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1578 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1579 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1580 if (ca_list == NULL) {
1581 OPENSSL_free(co_list);
1582 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1583 return (NULL); /* Failure */
1584 }
1585 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1586 disabled_mkey, disabled_auth, disabled_enc,
1587 disabled_mac, disabled_ssl, head);
1588
1589 /*
1590 * If the rule_string begins with DEFAULT, apply the default rule
1591 * before using the (possibly available) additional rules.
1592 */
1593 ok = 1;
1594 rule_p = rule_str;
1595 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1596 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1597 &head, &tail, ca_list);
1598 rule_p += 7;
1599 if (*rule_p == ':')
1600 rule_p++;
1601 }
1602
1603 if (ok && (strlen(rule_p) > 0))
1604 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1605
1606 OPENSSL_free((void *)ca_list); /* Not needed anymore */
1607
1608 if (!ok) { /* Rule processing failure */
1609 OPENSSL_free(co_list);
1610 return (NULL);
1611 }
1612
1613 /*
1614 * Allocate new "cipherstack" for the result, return with error
1615 * if we cannot get one.
1616 */
1617 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1618 OPENSSL_free(co_list);
1619 return (NULL);
1620 }
1621
1622 /*
1623 * The cipher selection for the list is done. The ciphers are added
1624 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1625 */
1626 for (curr = head; curr != NULL; curr = curr->next) {
7043fa70 1627#ifdef OPENSSL_FIPS
ae5c8664
MC		 1628 if (curr->active
1629 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
7043fa70 1630#else
ae5c8664 1631 if (curr->active)
7043fa70 1632#endif
ae5c8664
MC		 1633 {
1634 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
d02b48c6 1635#ifdef CIPHER_DEBUG
ae5c8664 1636 fprintf(stderr, "<%s>\n", curr->cipher->name);
d02b48c6 1637#endif
ae5c8664
MC		 1638 }
1639 }
1640 OPENSSL_free(co_list); /* Not needed any longer */
1641
1642 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1643 if (tmp_cipher_list == NULL) {
1644 sk_SSL_CIPHER_free(cipherstack);
1645 return NULL;
1646 }
1647 if (*cipher_list != NULL)
1648 sk_SSL_CIPHER_free(*cipher_list);
1649 *cipher_list = cipherstack;
1650 if (*cipher_list_by_id != NULL)
1651 sk_SSL_CIPHER_free(*cipher_list_by_id);
1652 *cipher_list_by_id = tmp_cipher_list;
1653 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,
1654 ssl_cipher_ptr_id_cmp);
1655
1656 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1657 return (cipherstack);
1658}
d02b48c6 1659
a131de9b 1660char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
ae5c8664
MC		 1661{
1662 int is_export, pkl, kl;
1663 const char *ver, *exp_str;
1664 const char *kx, *au, *enc, *mac;
1665 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2;
f9b3bff6 1666#ifdef KSSL_DEBUG
ae5c8664
MC		 1667 static const char *format =
1668 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
f9b3bff6 1669#else
ae5c8664
MC		 1670 static const char *format =
1671 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1672#endif /* KSSL_DEBUG */
1673
1674 alg_mkey = cipher->algorithm_mkey;
1675 alg_auth = cipher->algorithm_auth;
1676 alg_enc = cipher->algorithm_enc;
1677 alg_mac = cipher->algorithm_mac;
1678 alg_ssl = cipher->algorithm_ssl;
1679
1680 alg2 = cipher->algorithm2;
1681
1682 is_export = SSL_C_IS_EXPORT(cipher);
1683 pkl = SSL_C_EXPORT_PKEYLENGTH(cipher);
1684 kl = SSL_C_EXPORT_KEYLENGTH(cipher);
1685 exp_str = is_export ? " export" : "";
1686
1687 if (alg_ssl & SSL_SSLV2)
1688 ver = "SSLv2";
1689 else if (alg_ssl & SSL_SSLV3)
1690 ver = "SSLv3";
1691 else if (alg_ssl & SSL_TLSV1_2)
1692 ver = "TLSv1.2";
1693 else
1694 ver = "unknown";
1695
1696 switch (alg_mkey) {
1697 case SSL_kRSA:
1698 kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA";
1699 break;
1700 case SSL_kDHr:
1701 kx = "DH/RSA";
1702 break;
1703 case SSL_kDHd:
1704 kx = "DH/DSS";
1705 break;
1706 case SSL_kKRB5:
1707 kx = "KRB5";
1708 break;
1709 case SSL_kEDH:
1710 kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH";
1711 break;
1712 case SSL_kECDHr:
1713 kx = "ECDH/RSA";
1714 break;
1715 case SSL_kECDHe:
1716 kx = "ECDH/ECDSA";
1717 break;
1718 case SSL_kEECDH:
1719 kx = "ECDH";
1720 break;
1721 case SSL_kPSK:
1722 kx = "PSK";
1723 break;
1724 case SSL_kSRP:
1725 kx = "SRP";
1726 break;
1727 case SSL_kGOST:
1728 kx = "GOST";
1729 break;
1730 default:
1731 kx = "unknown";
1732 }
1733
1734 switch (alg_auth) {
1735 case SSL_aRSA:
1736 au = "RSA";
1737 break;
1738 case SSL_aDSS:
1739 au = "DSS";
1740 break;
1741 case SSL_aDH:
1742 au = "DH";
1743 break;
1744 case SSL_aKRB5:
1745 au = "KRB5";
1746 break;
1747 case SSL_aECDH:
1748 au = "ECDH";
1749 break;
1750 case SSL_aNULL:
1751 au = "None";
1752 break;
1753 case SSL_aECDSA:
1754 au = "ECDSA";
1755 break;
1756 case SSL_aPSK:
1757 au = "PSK";
1758 break;
1759 case SSL_aSRP:
1760 au = "SRP";
1761 break;
1762 case SSL_aGOST94:
1763 au = "GOST94";
1764 break;
1765 case SSL_aGOST01:
1766 au = "GOST01";
1767 break;
1768 default:
1769 au = "unknown";
1770 break;
1771 }
1772
1773 switch (alg_enc) {
1774 case SSL_DES:
1775 enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)";
1776 break;
1777 case SSL_3DES:
1778 enc = "3DES(168)";
1779 break;
1780 case SSL_RC4:
1781 enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)")
1782 : ((alg2 & SSL2_CF_8_BYTE_ENC) ? "RC4(64)" : "RC4(128)");
1783 break;
1784 case SSL_RC2:
1785 enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "RC2(128)";
1786 break;
1787 case SSL_IDEA:
1788 enc = "IDEA(128)";
1789 break;
1790 case SSL_eNULL:
1791 enc = "None";
1792 break;
1793 case SSL_AES128:
1794 enc = "AES(128)";
1795 break;
1796 case SSL_AES256:
1797 enc = "AES(256)";
1798 break;
1799 case SSL_AES128GCM:
1800 enc = "AESGCM(128)";
1801 break;
1802 case SSL_AES256GCM:
1803 enc = "AESGCM(256)";
1804 break;
1805 case SSL_CAMELLIA128:
1806 enc = "Camellia(128)";
1807 break;
1808 case SSL_CAMELLIA256:
1809 enc = "Camellia(256)";
1810 break;
1811 case SSL_SEED:
1812 enc = "SEED(128)";
1813 break;
1814 case SSL_eGOST2814789CNT:
1815 enc = "GOST89(256)";
1816 break;
1817 default:
1818 enc = "unknown";
1819 break;
1820 }
1821
1822 switch (alg_mac) {
1823 case SSL_MD5:
1824 mac = "MD5";
1825 break;
1826 case SSL_SHA1:
1827 mac = "SHA1";
1828 break;
1829 case SSL_SHA256:
1830 mac = "SHA256";
1831 break;
1832 case SSL_SHA384:
1833 mac = "SHA384";
1834 break;
1835 case SSL_AEAD:
1836 mac = "AEAD";
1837 break;
1838 case SSL_GOST89MAC:
1839 mac = "GOST89";
1840 break;
1841 case SSL_GOST94:
1842 mac = "GOST94";
1843 break;
1844 default:
1845 mac = "unknown";
1846 break;
1847 }
1848
1849 if (buf == NULL) {
1850 len = 128;
1851 buf = OPENSSL_malloc(len);
1852 if (buf == NULL)
1853 return ("OPENSSL_malloc Error");
1854 } else if (len < 128)
1855 return ("Buffer too small");
d02b48c6 1856
f9b3bff6 1857#ifdef KSSL_DEBUG
ae5c8664
MC		 1858 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1859 exp_str, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl);
f9b3bff6 1860#else
ae5c8664
MC		 1861 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1862 exp_str);
1863#endif /* KSSL_DEBUG */
1864 return (buf);
1865}
d02b48c6 1866
0821bcd4 1867char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
ae5c8664
MC		 1868{
1869 int i;
1870
1871 if (c == NULL)
1872 return ("(NONE)");
1873 i = (int)(c->id >> 24L);
1874 if (i == 3)
1875 return ("TLSv1/SSLv3");
1876 else if (i == 2)
1877 return ("SSLv2");
1878 else
1879 return ("unknown");
1880}
d02b48c6
RE		 1881
1882/* return the actual cipher being used */
0821bcd4 1883const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
ae5c8664
MC		 1884{
1885 if (c != NULL)
1886 return (c->name);
1887 return ("(NONE)");
1888}
d02b48c6 1889
657e60fa 1890/* number of bits for symmetric cipher */
0821bcd4 1891int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
ae5c8664
MC		 1892{
1893 int ret = 0;
1894
1895 if (c != NULL) {
1896 if (alg_bits != NULL)
1897 *alg_bits = c->alg_bits;
1898 ret = c->strength_bits;
1899 }
1900 return (ret);
1901}
d02b48c6 1902
74096890 1903unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
ae5c8664
MC		 1904{
1905 return c->id;
1906}
74096890 1907
6b691a5c 1908SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
ae5c8664
MC		 1909{
1910 SSL_COMP *ctmp;
1911 int i, nn;
1912
1913 if ((n == 0) || (sk == NULL))
1914 return (NULL);
1915 nn = sk_SSL_COMP_num(sk);
1916 for (i = 0; i < nn; i++) {
1917 ctmp = sk_SSL_COMP_value(sk, i);
1918 if (ctmp->id == n)
1919 return (ctmp);
1920 }
1921 return (NULL);
1922}
413c4f45 1923
09b6c2ef
DSH		 1924#ifdef OPENSSL_NO_COMP
1925void *SSL_COMP_get_compression_methods(void)
ae5c8664
MC		 1926{
1927 return NULL;
1928}
1929
09b6c2ef 1930int SSL_COMP_add_compression_method(int id, void *cm)
ae5c8664
MC		 1931{
1932 return 1;
1933}
09b6c2ef
DSH		 1934
1935const char *SSL_COMP_get_name(const void *comp)
ae5c8664
MC		 1936{
1937 return NULL;
1938}
09b6c2ef 1939#else
6b691a5c 1940STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
ae5c8664
MC		 1941{
1942 load_builtin_compressions();
1943 return (ssl_comp_methods);
1944}
1945
1946STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1947 *meths)
1948{
1949 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1950 ssl_comp_methods = meths;
1951 return old_meths;
1952}
9f1979b9 1953
976c5830 1954static void cmeth_free(SSL_COMP *cm)
ae5c8664
MC		 1955{
1956 OPENSSL_free(cm);
1957}
976c5830
DSH		 1958
1959void SSL_COMP_free_compression_methods(void)
ae5c8664
MC		 1960{
1961 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1962 ssl_comp_methods = NULL;
1963 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1964}
976c5830 1965
6b691a5c 1966int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
ae5c8664
MC		 1967{
1968 SSL_COMP *comp;
413c4f45 1969
ae5c8664
MC		 1970 if (cm == NULL || cm->type == NID_undef)
1971 return 1;
9f495243 1972
ae5c8664
MC		 1973 /*-
1974 * According to draft-ietf-tls-compression-04.txt, the
1975 * compression number ranges should be the following:
6977c7e2
TH		 1976 *
1977 * 0 to 63: methods defined by the IETF
ae5c8664
MC		 1978 * 64 to 192: external party methods assigned by IANA
1979 * 193 to 255: reserved for private use
1980 */
1981 if (id < 193 || id > 255) {
1982 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1983 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1984 return 0;
1985 }
1986
1987 MemCheck_off();
1988 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1989 comp->id = id;
1990 comp->method = cm;
1991 load_builtin_compressions();
1992 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1993 OPENSSL_free(comp);
1994 MemCheck_on();
1995 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1996 SSL_R_DUPLICATE_COMPRESSION_ID);
1997 return (1);
1998 } else if ((ssl_comp_methods == NULL)
1999 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
2000 OPENSSL_free(comp);
2001 MemCheck_on();
2002 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
2003 return (1);
2004 } else {
2005 MemCheck_on();
2006 return (0);
2007 }
2008}
377dcdba
RL		 2009
2010const char *SSL_COMP_get_name(const COMP_METHOD *comp)
ae5c8664
MC		 2011{
2012 if (comp)
2013 return comp->name;
2014 return NULL;
2015}
09b6c2ef 2016#endif
67d9dcf0
DSH		 2017/* For a cipher return the index corresponding to the certificate type */
2018int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
ae5c8664
MC		 2019{
2020 unsigned long alg_k, alg_a;
2021
2022 alg_k = c->algorithm_mkey;
2023 alg_a = c->algorithm_auth;
2024
2025 if (alg_k & (SSL_kECDHr | SSL_kECDHe)) {
2026 /*
2027 * we don't need to look at SSL_kEECDH since no certificate is needed
2028 * for anon ECDH and for authenticated EECDH, the check for the auth
2029 * algorithm will set i correctly NOTE: For ECDH-RSA, we need an ECC
2030 * not an RSA cert but for EECDH-RSA we need an RSA cert. Placing the
2031 * checks for SSL_kECDH before RSA checks ensures the correct cert is
2032 * chosen.
2033 */
2034 return SSL_PKEY_ECC;
2035 } else if (alg_a & SSL_aECDSA)
2036 return SSL_PKEY_ECC;
2037 else if (alg_k & SSL_kDHr)
2038 return SSL_PKEY_DH_RSA;
2039 else if (alg_k & SSL_kDHd)
2040 return SSL_PKEY_DH_DSA;
2041 else if (alg_a & SSL_aDSS)
2042 return SSL_PKEY_DSA_SIGN;
2043 else if (alg_a & SSL_aRSA)
2044 return SSL_PKEY_RSA_ENC;
2045 else if (alg_a & SSL_aKRB5)
2046 /* VRS something else here? */
2047 return -1;
2048 else if (alg_a & SSL_aGOST94)
2049 return SSL_PKEY_GOST94;
2050 else if (alg_a & SSL_aGOST01)
2051 return SSL_PKEY_GOST01;
2052 return -1;
2053}
67d9dcf0 2054
1520e6c0 2055const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
ae5c8664
MC		 2056{
2057 const SSL_CIPHER *c;
2058 c = ssl->method->get_cipher_by_char(ptr);
2059 if (c == NULL || c->valid == 0)
2060 return NULL;
2061 return c;
2062}
1520e6c0
DSH		 2063
2064const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
ae5c8664
MC		 2065{
2066 return ssl->method->get_cipher_by_char(ptr);
2067}
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