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Remove static ECDH support.
[thirdparty/openssl.git] / ssl / ssl_ciph.c
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58964a49 1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE		 2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
0f113f3e 7 *
d02b48c6
RE		 8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
0f113f3e 14 *
d02b48c6
RE		 15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
0f113f3e 21 *
d02b48c6
RE		 22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
0f113f3e 36 * 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6
RE		 37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
0f113f3e 39 *
d02b48c6
RE		 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
0f113f3e 51 *
d02b48c6
RE		 52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
56 */
675f605d 57/* ====================================================================
52b8dad8 58 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
675f605d
BM		 59 *
60 * Redistribution and use in source and binary forms, with or without
61 * modification, are permitted provided that the following conditions
62 * are met:
63 *
64 * 1. Redistributions of source code must retain the above copyright
0f113f3e 65 * notice, this list of conditions and the following disclaimer.
675f605d
BM		 66 *
67 * 2. Redistributions in binary form must reproduce the above copyright
68 * notice, this list of conditions and the following disclaimer in
69 * the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3. All advertising materials mentioning features or use of this
73 * software must display the following acknowledgment:
74 * "This product includes software developed by the OpenSSL Project
75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
76 *
77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78 * endorse or promote products derived from this software without
79 * prior written permission. For written permission, please contact
80 * openssl-core@openssl.org.
81 *
82 * 5. Products derived from this software may not be called "OpenSSL"
83 * nor may "OpenSSL" appear in their names without prior written
84 * permission of the OpenSSL Project.
85 *
86 * 6. Redistributions of any form whatsoever must retain the following
87 * acknowledgment:
88 * "This product includes software developed by the OpenSSL Project
89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
90 *
91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102 * OF THE POSSIBILITY OF SUCH DAMAGE.
103 * ====================================================================
104 *
105 * This product includes cryptographic software written by Eric Young
106 * (eay@cryptsoft.com). This product includes software written by Tim
107 * Hudson (tjh@cryptsoft.com).
108 *
109 */
ea262260
BM		 110/* ====================================================================
111 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
0f113f3e 112 * ECC cipher suite support in OpenSSL originally developed by
ea262260
BM		 113 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
114 */
ddac1974
NL		 115/* ====================================================================
116 * Copyright 2005 Nokia. All rights reserved.
117 *
118 * The portions of the attached software ("Contribution") is developed by
119 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
120 * license.
121 *
122 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
123 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
124 * support (see RFC 4279) to OpenSSL.
125 *
126 * No patent licenses or other rights except those expressly stated in
127 * the OpenSSL open source license shall be deemed granted or received
128 * expressly, by implication, estoppel, or otherwise.
129 *
130 * No assurances are provided by Nokia that the Contribution does not
131 * infringe the patent or other intellectual property rights of any third
132 * party or that the license provides you with all the necessary rights
133 * to make use of the Contribution.
134 *
135 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
136 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
137 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
138 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
139 * OTHERWISE.
140 */
141
d02b48c6 142#include <stdio.h>
ec577822 143#include <openssl/objects.h>
fceac0bc 144#ifndef OPENSSL_NO_COMP
0f113f3e 145# include <openssl/comp.h>
fceac0bc 146#endif
70531c14 147#ifndef OPENSSL_NO_ENGINE
0f113f3e 148# include <openssl/engine.h>
70531c14 149#endif
d02b48c6
RE		 150#include "ssl_locl.h"
151
0f113f3e
MC		 152#define SSL_ENC_DES_IDX 0
153#define SSL_ENC_3DES_IDX 1
154#define SSL_ENC_RC4_IDX 2
155#define SSL_ENC_RC2_IDX 3
156#define SSL_ENC_IDEA_IDX 4
157#define SSL_ENC_NULL_IDX 5
158#define SSL_ENC_AES128_IDX 6
159#define SSL_ENC_AES256_IDX 7
160#define SSL_ENC_CAMELLIA128_IDX 8
161#define SSL_ENC_CAMELLIA256_IDX 9
162#define SSL_ENC_GOST89_IDX 10
163#define SSL_ENC_SEED_IDX 11
164#define SSL_ENC_AES128GCM_IDX 12
165#define SSL_ENC_AES256GCM_IDX 13
e75c5a79
DSH		 166#define SSL_ENC_AES128CCM_IDX 14
167#define SSL_ENC_AES256CCM_IDX 15
3d3701ea
DSH		 168#define SSL_ENC_AES128CCM8_IDX 16
169#define SSL_ENC_AES256CCM8_IDX 17
e44380a9 170#define SSL_ENC_GOST8912_IDX 18
a76ba82c
AP		 171#define SSL_ENC_CHACHA_IDX 19
172#define SSL_ENC_NUM_IDX 20
0f113f3e 173
98c9ce2f
DSH		 174/* NB: make sure indices in these tables match values above */
175
176typedef struct {
90d9e49a 177 uint32_t mask;
98c9ce2f
DSH		 178 int nid;
179} ssl_cipher_table;
180
181/* Table of NIDs for each cipher */
182static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
183 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
184 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
185 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
186 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
187 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
188 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
189 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
190 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
191 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
192 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
193 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
194 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
195 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
e75c5a79
DSH		 196 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
197 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
3d3701ea
DSH		 198 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
199 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
e44380a9
DB		 200 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
201 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX */
a76ba82c 202 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305},
98c9ce2f
DSH		 203};
204
0f113f3e
MC		 205static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
206 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
207 NULL, NULL
208};
209
210#define SSL_COMP_NULL_IDX 0
211#define SSL_COMP_ZLIB_IDX 1
212#define SSL_COMP_NUM_IDX 2
213
214static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
215
0f113f3e
MC		 216/*
217 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
218 * in the ssl_locl.h
b948e2c5 219 */
98c9ce2f 220
0f113f3e 221#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
98c9ce2f
DSH		 222
223/* NB: make sure indices in this table matches values above */
224static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
225 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
226 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
227 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
228 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
229 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
e44380a9
DB		 230 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
231 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
232 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
28ba2541 233 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
7afd2312
DSH		 234 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
235 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
236 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
98c9ce2f
DSH		 237};
238
0f113f3e 239static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
7afd2312 240 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
0f113f3e
MC		 241};
242
98c9ce2f
DSH		 243/* Utility function for table lookup */
244static int ssl_cipher_info_find(const ssl_cipher_table * table,
90d9e49a 245 size_t table_cnt, uint32_t mask)
98c9ce2f
DSH		 246{
247 size_t i;
248 for (i = 0; i < table_cnt; i++, table++) {
249 if (table->mask == mask)
250 return i;
251 }
252 return -1;
253}
254
255#define ssl_cipher_info_lookup(table, x) \
b6eb9827 256 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
98c9ce2f 257
0f113f3e
MC		 258/*
259 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
260 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
261 * found
262 */
263static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
e44380a9 264 /* MD5, SHA, GOST94, MAC89 */
0f113f3e 265 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
e44380a9
DB		 266 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
267 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
268 /* GOST2012_512 */
269 EVP_PKEY_HMAC,
0f113f3e
MC		 270};
271
272static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
28ba2541 273 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
0f113f3e
MC		 274};
275
276#define CIPHER_ADD 1
277#define CIPHER_KILL 2
278#define CIPHER_DEL 3
279#define CIPHER_ORD 4
280#define CIPHER_SPECIAL 5
281
282typedef struct cipher_order_st {
283 const SSL_CIPHER *cipher;
284 int active;
285 int dead;
286 struct cipher_order_st *next, *prev;
287} CIPHER_ORDER;
288
289static const SSL_CIPHER cipher_aliases[] = {
290 /* "ALL" doesn't include eNULL (must be specifically enabled) */
291 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, 0},
292 /* "COMPLEMENTOFALL" */
293 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
294
295 /*
296 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
297 * ALL!)
298 */
c84f7f4a 299 {0, SSL_TXT_CMPDEF, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_NOT_DEFAULT, 0, 0, 0},
0f113f3e
MC		 300
301 /*
302 * key exchange aliases (some of those using only a single bit here
303 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
304 * combines DHE_DSS and DHE_RSA)
305 */
306 {0, SSL_TXT_kRSA, 0, SSL_kRSA, 0, 0, 0, 0, 0, 0, 0, 0},
307
0f113f3e
MC		 308 {0, SSL_TXT_kEDH, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
309 {0, SSL_TXT_kDHE, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0, 0},
bc71f910 310 {0, SSL_TXT_DH, 0, SSL_kDHE, 0, 0, 0, 0, 0, 0, 0,
0f113f3e
MC		 311 0},
312
0f113f3e
MC		 313 {0, SSL_TXT_kEECDH, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
314 {0, SSL_TXT_kECDHE, 0, SSL_kECDHE, 0, 0, 0, 0, 0, 0, 0, 0},
ce0c1f2b 315 {0, SSL_TXT_ECDH, 0, SSL_kECDHE, 0, 0, 0, 0, 0,
0f113f3e
MC		 316 0, 0, 0},
317
318 {0, SSL_TXT_kPSK, 0, SSL_kPSK, 0, 0, 0, 0, 0, 0, 0, 0},
dcbd5060
DSH		 319 {0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK, 0, 0, 0, 0, 0, 0, 0, 0},
320 {0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
321 {0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK, 0, 0, 0, 0, 0, 0, 0, 0},
0f113f3e
MC		 322 {0, SSL_TXT_kSRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
323 {0, SSL_TXT_kGOST, 0, SSL_kGOST, 0, 0, 0, 0, 0, 0, 0, 0},
324
325 /* server authentication aliases */
326 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
327 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
328 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS, 0, 0, 0, 0, 0, 0, 0},
0f113f3e 329 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
0f113f3e
MC		 330 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
331 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA, 0, 0, 0, 0, 0, 0, 0},
332 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK, 0, 0, 0, 0, 0, 0, 0},
0f113f3e 333 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01, 0, 0, 0, 0, 0, 0, 0},
e44380a9
DB		 334 {0, SSL_TXT_aGOST12, 0, 0, SSL_aGOST12, 0, 0, 0, 0, 0, 0, 0},
335 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01 | SSL_aGOST12, 0, 0, 0,
336 0, 0, 0, 0},
0f113f3e
MC		 337 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP, 0, 0, 0, 0, 0, 0, 0},
338
339 /* aliases combining key exchange and server authentication */
340 {0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
341 {0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
342 {0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
343 {0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
344 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
0f113f3e
MC		 345 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA, 0, 0, 0, 0, 0, 0, 0},
346 {0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
347 {0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL, 0, 0, 0, 0, 0, 0, 0},
dcbd5060 348 {0, SSL_TXT_PSK, 0, SSL_PSK, 0, 0, 0, 0, 0, 0, 0, 0},
0f113f3e
MC		 349 {0, SSL_TXT_SRP, 0, SSL_kSRP, 0, 0, 0, 0, 0, 0, 0, 0},
350
351 /* symmetric encryption aliases */
352 {0, SSL_TXT_DES, 0, 0, 0, SSL_DES, 0, 0, 0, 0, 0, 0},
353 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES, 0, 0, 0, 0, 0, 0},
354 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4, 0, 0, 0, 0, 0, 0},
355 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2, 0, 0, 0, 0, 0, 0},
356 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA, 0, 0, 0, 0, 0, 0},
357 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED, 0, 0, 0, 0, 0, 0},
358 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL, 0, 0, 0, 0, 0, 0},
e44380a9
DB		 359 {0, SSL_TXT_GOST, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12, 0,
360 0, 0, 0, 0, 0},
3d3701ea 361 {0, SSL_TXT_AES128, 0, 0, 0, SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8, 0,
e75c5a79 362 0, 0, 0, 0, 0},
3d3701ea 363 {0, SSL_TXT_AES256, 0, 0, 0, SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8, 0,
e75c5a79 364 0, 0, 0, 0, 0},
0f113f3e
MC		 365 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES, 0, 0, 0, 0, 0, 0},
366 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM, 0, 0, 0, 0,
367 0, 0},
3d3701ea
DSH		 368 {0, SSL_TXT_AES_CCM, 0, 0, 0, SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8, 0, 0, 0, 0,
369 0, 0},
370 {0, SSL_TXT_AES_CCM_8, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8, 0, 0, 0, 0,
e75c5a79 371 0, 0},
0f113f3e
MC		 372 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128, 0, 0, 0, 0, 0, 0},
373 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256, 0, 0, 0, 0, 0, 0},
1c37fd96
TS		 374 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA, 0, 0, 0, 0, 0, 0},
375 {0, SSL_TXT_CHACHA20, 0, 0, 0, SSL_CHACHA20, 0, 0, 0, 0, 0, 0 },
0f113f3e
MC		 376
377 /* MAC aliases */
378 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5, 0, 0, 0, 0, 0},
379 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
380 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1, 0, 0, 0, 0, 0},
381 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94, 0, 0, 0, 0, 0},
e44380a9
DB		 382 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12, 0, 0,
383 0, 0, 0},
0f113f3e
MC		 384 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256, 0, 0, 0, 0, 0},
385 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384, 0, 0, 0, 0, 0},
e44380a9 386 {0, SSL_TXT_GOST12, 0, 0, 0, 0, SSL_GOST12_256, 0, 0, 0, 0, 0},
0f113f3e
MC		 387
388 /* protocol version aliases */
389 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0},
5e3d21fe 390 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, SSL_SSLV3, 0, 0, 0, 0},
60a25abd 391 {0, "TLSv1.0", 0, 0, 0, 0, 0, SSL_TLSV1, 0, 0, 0, 0},
0f113f3e
MC		 392 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, SSL_TLSV1_2, 0, 0, 0, 0},
393
0f113f3e 394 /* strength classes */
0f113f3e
MC		 395 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, SSL_LOW, 0, 0, 0},
396 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, SSL_MEDIUM, 0, 0, 0},
397 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, SSL_HIGH, 0, 0, 0},
398 /* FIPS 140-2 approved ciphersuite */
399 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, SSL_FIPS, 0, 0, 0},
400
401 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
0f113f3e
MC		 402 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, 0,
403 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, SSL_SSLV3,
361a1191 404 SSL_HIGH | SSL_FIPS, 0, 0, 0,},
0f113f3e
MC		 405 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, 0,
406 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, SSL_SSLV3,
361a1191 407 SSL_HIGH | SSL_FIPS, 0, 0, 0,},
0f113f3e
MC		 408
409};
410
411/*
412 * Search for public key algorithm with given name and return its pkey_id if
413 * it is available. Otherwise return 0
81025661 414 */
70531c14
DSH		 415#ifdef OPENSSL_NO_ENGINE
416
81025661 417static int get_optional_pkey_id(const char *pkey_name)
0f113f3e
MC		 418{
419 const EVP_PKEY_ASN1_METHOD *ameth;
420 int pkey_id = 0;
421 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
5f3d93e4
MC		 422 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
423 ameth) > 0) {
424 return pkey_id;
0f113f3e 425 }
5f3d93e4 426 return 0;
0f113f3e 427}
d02b48c6 428
70531c14
DSH		 429#else
430
431static int get_optional_pkey_id(const char *pkey_name)
0f113f3e
MC		 432{
433 const EVP_PKEY_ASN1_METHOD *ameth;
434 ENGINE *tmpeng = NULL;
435 int pkey_id = 0;
436 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
437 if (ameth) {
5f3d93e4
MC		 438 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
439 ameth) <= 0)
440 pkey_id = 0;
0f113f3e
MC		 441 }
442 if (tmpeng)
443 ENGINE_finish(tmpeng);
444 return pkey_id;
445}
70531c14
DSH		 446
447#endif
448
633d49c7 449/* masks of disabled algorithms */
90d9e49a
DSH		 450static uint32_t disabled_enc_mask;
451static uint32_t disabled_mac_mask;
452static uint32_t disabled_mkey_mask;
453static uint32_t disabled_auth_mask;
633d49c7 454
7f3c9036 455void ssl_load_ciphers(void)
0f113f3e 456{
98c9ce2f
DSH		 457 size_t i;
458 const ssl_cipher_table *t;
633d49c7 459 disabled_enc_mask = 0;
98c9ce2f 460 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
633d49c7 461 if (t->nid == NID_undef) {
98c9ce2f 462 ssl_cipher_methods[i] = NULL;
633d49c7
DSH		 463 } else {
464 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
465 ssl_cipher_methods[i] = cipher;
466 if (cipher == NULL)
467 disabled_enc_mask |= t->mask;
468 }
0f113f3e 469 }
633d49c7
DSH		 470#ifdef SSL_FORBID_ENULL
471 disabled_enc_mask |= SSL_eNULL;
472#endif
473 disabled_mac_mask = 0;
98c9ce2f 474 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
633d49c7
DSH		 475 const EVP_MD *md = EVP_get_digestbynid(t->nid);
476 ssl_digest_methods[i] = md;
477 if (md == NULL) {
478 disabled_mac_mask |= t->mask;
479 } else {
480 ssl_mac_secret_size[i] = EVP_MD_size(md);
98c9ce2f
DSH		 481 OPENSSL_assert(ssl_mac_secret_size[i] >= 0);
482 }
483 }
484 /* Make sure we can access MD5 and SHA1 */
485 OPENSSL_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL);
486 OPENSSL_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL);
633d49c7
DSH		 487
488 disabled_mkey_mask = 0;
489 disabled_auth_mask = 0;
490
491#ifdef OPENSSL_NO_RSA
332a251f 492 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
633d49c7
DSH		 493 disabled_auth_mask |= SSL_aRSA;
494#endif
495#ifdef OPENSSL_NO_DSA
496 disabled_auth_mask |= SSL_aDSS;
497#endif
498#ifdef OPENSSL_NO_DH
bc71f910 499 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
633d49c7
DSH		 500#endif
501#ifdef OPENSSL_NO_EC
ce0c1f2b
DSH		 502 disabled_mkey_mask |= SSL_kECDHEPSK;
503 disabled_auth_mask |= SSL_aECDSA;
633d49c7
DSH		 504#endif
505#ifdef OPENSSL_NO_PSK
332a251f 506 disabled_mkey_mask |= SSL_PSK;
633d49c7
DSH		 507 disabled_auth_mask |= SSL_aPSK;
508#endif
509#ifdef OPENSSL_NO_SRP
510 disabled_mkey_mask |= SSL_kSRP;
511#endif
512
513 /*
514 * Check for presence of GOST 34.10 algorithms, and if they are not
515 * present, disable appropriate auth and key exchange
516 */
e1fa652d
DSH		 517 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
518 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
519 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
633d49c7
DSH		 520 } else {
521 disabled_mac_mask |= SSL_GOST89MAC;
e1fa652d 522 }
633d49c7 523
e44380a9
DB		 524 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] = get_optional_pkey_id("gost-mac-12");
525 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) {
526 ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
527 } else {
528 disabled_mac_mask |= SSL_GOST89MAC12;
529 }
530
633d49c7 531 if (!get_optional_pkey_id("gost2001"))
e44380a9
DB		 532 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
533 if (!get_optional_pkey_id("gost2012_256"))
534 disabled_auth_mask |= SSL_aGOST12;
535 if (!get_optional_pkey_id("gost2012_512"))
536 disabled_auth_mask |= SSL_aGOST12;
633d49c7
DSH		 537 /*
538 * Disable GOST key exchange if no GOST signature algs are available *
539 */
e44380a9 540 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) == (SSL_aGOST01 | SSL_aGOST12))
633d49c7 541 disabled_mkey_mask |= SSL_kGOST;
0f113f3e
MC		 542}
543
09b6c2ef
DSH		 544#ifndef OPENSSL_NO_COMP
545
0f113f3e
MC		 546static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
547{
548 return ((*a)->id - (*b)->id);
549}
7ba666fa
RL		 550
551static void load_builtin_compressions(void)
0f113f3e
MC		 552{
553 int got_write_lock = 0;
554
555 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
556 if (ssl_comp_methods == NULL) {
557 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
558 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
559 got_write_lock = 1;
560
561 if (ssl_comp_methods == NULL) {
562 SSL_COMP *comp = NULL;
9a555706 563 COMP_METHOD *method = COMP_zlib();
0f113f3e 564
bbd86bf5 565 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
0f113f3e 566 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
9a555706
RS		 567 if (COMP_get_type(method) != NID_undef
568 && ssl_comp_methods != NULL) {
b4faea50 569 comp = OPENSSL_malloc(sizeof(*comp));
0f113f3e 570 if (comp != NULL) {
9a555706
RS		 571 comp->method = method;
572 comp->id = SSL_COMP_ZLIB_IDX;
573 comp->name = COMP_get_name(method);
574 sk_SSL_COMP_push(ssl_comp_methods, comp);
575 sk_SSL_COMP_sort(ssl_comp_methods);
0f113f3e 576 }
0f113f3e 577 }
bbd86bf5 578 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e
MC		 579 }
580 }
581
582 if (got_write_lock)
583 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
584 else
585 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
586}
09b6c2ef 587#endif
7ba666fa 588
0821bcd4 589int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
0f113f3e
MC		 590 const EVP_MD **md, int *mac_pkey_type,
591 int *mac_secret_size, SSL_COMP **comp, int use_etm)
592{
593 int i;
594 const SSL_CIPHER *c;
595
596 c = s->cipher;
597 if (c == NULL)
598 return (0);
599 if (comp != NULL) {
600 SSL_COMP ctmp;
09b6c2ef 601#ifndef OPENSSL_NO_COMP
0f113f3e 602 load_builtin_compressions();
09b6c2ef 603#endif
413c4f45 604
0f113f3e
MC		 605 *comp = NULL;
606 ctmp.id = s->compress_meth;
607 if (ssl_comp_methods != NULL) {
608 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
609 if (i >= 0)
610 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
611 else
612 *comp = NULL;
613 }
69f68237 614 /* If were only interested in comp then return success */
61986d32 615 if ((enc == NULL) && (md == NULL))
69f68237 616 return 1;
0f113f3e
MC		 617 }
618
619 if ((enc == NULL) || (md == NULL))
69f68237 620 return 0;
0f113f3e 621
98c9ce2f 622 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
0f113f3e 623
98c9ce2f 624 if (i == -1)
0f113f3e
MC		 625 *enc = NULL;
626 else {
627 if (i == SSL_ENC_NULL_IDX)
628 *enc = EVP_enc_null();
629 else
630 *enc = ssl_cipher_methods[i];
631 }
632
98c9ce2f
DSH		 633 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
634 if (i == -1) {
0f113f3e
MC		 635 *md = NULL;
636 if (mac_pkey_type != NULL)
637 *mac_pkey_type = NID_undef;
638 if (mac_secret_size != NULL)
639 *mac_secret_size = 0;
640 if (c->algorithm_mac == SSL_AEAD)
641 mac_pkey_type = NULL;
642 } else {
643 *md = ssl_digest_methods[i];
644 if (mac_pkey_type != NULL)
645 *mac_pkey_type = ssl_mac_pkey_id[i];
646 if (mac_secret_size != NULL)
647 *mac_secret_size = ssl_mac_secret_size[i];
648 }
649
650 if ((*enc != NULL) &&
651 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
652 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
653 const EVP_CIPHER *evp;
654
655 if (use_etm)
656 return 1;
657
658 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
659 s->ssl_version < TLS1_VERSION)
660 return 1;
661
662 if (FIPS_mode())
663 return 1;
664
665 if (c->algorithm_enc == SSL_RC4 &&
666 c->algorithm_mac == SSL_MD5 &&
667 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
668 *enc = evp, *md = NULL;
669 else if (c->algorithm_enc == SSL_AES128 &&
670 c->algorithm_mac == SSL_SHA1 &&
671 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
672 *enc = evp, *md = NULL;
673 else if (c->algorithm_enc == SSL_AES256 &&
674 c->algorithm_mac == SSL_SHA1 &&
675 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
676 *enc = evp, *md = NULL;
677 else if (c->algorithm_enc == SSL_AES128 &&
678 c->algorithm_mac == SSL_SHA256 &&
679 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
680 *enc = evp, *md = NULL;
681 else if (c->algorithm_enc == SSL_AES256 &&
682 c->algorithm_mac == SSL_SHA256 &&
683 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
684 *enc = evp, *md = NULL;
685 return (1);
686 } else
687 return (0);
688}
689
152fbc28 690const EVP_MD *ssl_md(int idx)
81025661 691{
28ba2541
DSH		 692 idx &= SSL_HANDSHAKE_MAC_MASK;
693 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
694 return NULL;
695 return ssl_digest_methods[idx];
696}
697
698const EVP_MD *ssl_handshake_md(SSL *s)
699{
152fbc28 700 return ssl_md(ssl_get_algorithm2(s));
28ba2541
DSH		 701}
702
703const EVP_MD *ssl_prf_md(SSL *s)
704{
152fbc28 705 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
81025661
DSH		 706}
707
58964a49 708#define ITEM_SEP(a) \
0f113f3e 709 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
58964a49 710
6b691a5c 711static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
0f113f3e
MC		 712 CIPHER_ORDER **tail)
713{
714 if (curr == *tail)
715 return;
716 if (curr == *head)
717 *head = curr->next;
718 if (curr->prev != NULL)
719 curr->prev->next = curr->next;
720 if (curr->next != NULL)
721 curr->next->prev = curr->prev;
722 (*tail)->next = curr;
723 curr->prev = *tail;
724 curr->next = NULL;
725 *tail = curr;
726}
58964a49 727
fd5bc65c 728static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
0f113f3e
MC		 729 CIPHER_ORDER **tail)
730{
731 if (curr == *head)
732 return;
733 if (curr == *tail)
734 *tail = curr->prev;
735 if (curr->next != NULL)
736 curr->next->prev = curr->prev;
737 if (curr->prev != NULL)
738 curr->prev->next = curr->next;
739 (*head)->prev = curr;
740 curr->next = *head;
741 curr->prev = NULL;
742 *head = curr;
743}
744
018e57c7 745static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
0f113f3e 746 int num_of_ciphers,
90d9e49a
DSH		 747 uint32_t disabled_mkey,
748 uint32_t disabled_auth,
749 uint32_t disabled_enc,
750 uint32_t disabled_mac,
751 uint32_t disabled_ssl,
0f113f3e
MC		 752 CIPHER_ORDER *co_list,
753 CIPHER_ORDER **head_p,
754 CIPHER_ORDER **tail_p)
755{
756 int i, co_list_num;
757 const SSL_CIPHER *c;
758
759 /*
760 * We have num_of_ciphers descriptions compiled in, depending on the
761 * method selected (SSLv3, TLSv1 etc).
762 * These will later be sorted in a linked list with at most num
763 * entries.
764 */
765
766 /* Get the initial list of ciphers */
767 co_list_num = 0; /* actual count of ciphers */
768 for (i = 0; i < num_of_ciphers; i++) {
769 c = ssl_method->get_cipher(i);
770 /* drop those that use any of that is not available */
771 if ((c != NULL) && c->valid &&
772 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
773 !(c->algorithm_mkey & disabled_mkey) &&
774 !(c->algorithm_auth & disabled_auth) &&
775 !(c->algorithm_enc & disabled_enc) &&
776 !(c->algorithm_mac & disabled_mac) &&
777 !(c->algorithm_ssl & disabled_ssl)) {
778 co_list[co_list_num].cipher = c;
779 co_list[co_list_num].next = NULL;
780 co_list[co_list_num].prev = NULL;
781 co_list[co_list_num].active = 0;
782 co_list_num++;
0f113f3e
MC		 783 /*
784 * if (!sk_push(ca_list,(char *)c)) goto err;
785 */
786 }
787 }
788
789 /*
790 * Prepare linked list from list entries
791 */
792 if (co_list_num > 0) {
793 co_list[0].prev = NULL;
794
795 if (co_list_num > 1) {
796 co_list[0].next = &co_list[1];
797
798 for (i = 1; i < co_list_num - 1; i++) {
799 co_list[i].prev = &co_list[i - 1];
800 co_list[i].next = &co_list[i + 1];
801 }
802
803 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
804 }
805
806 co_list[co_list_num - 1].next = NULL;
807
808 *head_p = &co_list[0];
809 *tail_p = &co_list[co_list_num - 1];
810 }
811}
d02b48c6 812
babb3798 813static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
0f113f3e 814 int num_of_group_aliases,
90d9e49a
DSH		 815 uint32_t disabled_mkey,
816 uint32_t disabled_auth,
817 uint32_t disabled_enc,
818 uint32_t disabled_mac,
819 uint32_t disabled_ssl,
0f113f3e
MC		 820 CIPHER_ORDER *head)
821{
822 CIPHER_ORDER *ciph_curr;
823 const SSL_CIPHER **ca_curr;
824 int i;
90d9e49a
DSH		 825 uint32_t mask_mkey = ~disabled_mkey;
826 uint32_t mask_auth = ~disabled_auth;
827 uint32_t mask_enc = ~disabled_enc;
828 uint32_t mask_mac = ~disabled_mac;
829 uint32_t mask_ssl = ~disabled_ssl;
0f113f3e
MC		 830
831 /*
832 * First, add the real ciphers as already collected
833 */
834 ciph_curr = head;
835 ca_curr = ca_list;
836 while (ciph_curr != NULL) {
837 *ca_curr = ciph_curr->cipher;
838 ca_curr++;
839 ciph_curr = ciph_curr->next;
840 }
841
842 /*
843 * Now we add the available ones from the cipher_aliases[] table.
844 * They represent either one or more algorithms, some of which
845 * in any affected category must be supported (set in enabled_mask),
846 * or represent a cipher strength value (will be added in any case because algorithms=0).
847 */
848 for (i = 0; i < num_of_group_aliases; i++) {
90d9e49a
DSH		 849 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
850 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
851 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
852 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
853 uint32_t algorithm_ssl = cipher_aliases[i].algorithm_ssl;
0f113f3e
MC		 854
855 if (algorithm_mkey)
856 if ((algorithm_mkey & mask_mkey) == 0)
857 continue;
858
859 if (algorithm_auth)
860 if ((algorithm_auth & mask_auth) == 0)
861 continue;
862
863 if (algorithm_enc)
864 if ((algorithm_enc & mask_enc) == 0)
865 continue;
866
867 if (algorithm_mac)
868 if ((algorithm_mac & mask_mac) == 0)
869 continue;
870
871 if (algorithm_ssl)
872 if ((algorithm_ssl & mask_ssl) == 0)
873 continue;
874
875 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
876 ca_curr++;
877 }
878
879 *ca_curr = NULL; /* end of list */
880}
d02b48c6 881
90d9e49a
DSH		 882static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
883 uint32_t alg_auth, uint32_t alg_enc,
884 uint32_t alg_mac, uint32_t alg_ssl,
885 uint32_t algo_strength, int rule,
886 int32_t strength_bits, CIPHER_ORDER **head_p,
0f113f3e
MC		 887 CIPHER_ORDER **tail_p)
888{
889 CIPHER_ORDER *head, *tail, *curr, *next, *last;
890 const SSL_CIPHER *cp;
891 int reverse = 0;
018e57c7
DSH		 892
893#ifdef CIPHER_DEBUG
0f113f3e
MC		 894 fprintf(stderr,
895 "Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
896 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl,
897 algo_strength, strength_bits);
018e57c7 898#endif
d02b48c6 899
0f113f3e
MC		 900 if (rule == CIPHER_DEL)
901 reverse = 1; /* needed to maintain sorting between
902 * currently deleted ciphers */
903
904 head = *head_p;
905 tail = *tail_p;
906
907 if (reverse) {
908 next = tail;
909 last = head;
910 } else {
911 next = head;
912 last = tail;
913 }
914
915 curr = NULL;
916 for (;;) {
917 if (curr == last)
918 break;
919
920 curr = next;
921
922 if (curr == NULL)
923 break;
924
925 next = reverse ? curr->prev : curr->next;
926
927 cp = curr->cipher;
928
929 /*
930 * Selection criteria is either the value of strength_bits
931 * or the algorithms used.
932 */
933 if (strength_bits >= 0) {
934 if (strength_bits != cp->strength_bits)
935 continue;
936 } else {
018e57c7 937#ifdef CIPHER_DEBUG
0f113f3e
MC		 938 fprintf(stderr,
939 "\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n",
940 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
941 cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl,
942 cp->algo_strength);
018e57c7 943#endif
323fa645 944#ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
0f113f3e
MC		 945 if (cipher_id && cipher_id != cp->id)
946 continue;
323fa645 947#endif
0f113f3e
MC		 948 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
949 continue;
950 if (alg_auth && !(alg_auth & cp->algorithm_auth))
951 continue;
952 if (alg_enc && !(alg_enc & cp->algorithm_enc))
953 continue;
954 if (alg_mac && !(alg_mac & cp->algorithm_mac))
955 continue;
956 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
957 continue;
361a1191 958 if (algo_strength && !(algo_strength & cp->algo_strength))
0f113f3e 959 continue;
c84f7f4a
MC		 960 if ((algo_strength & SSL_DEFAULT_MASK)
961 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
962 continue;
0f113f3e 963 }
018e57c7
DSH		 964
965#ifdef CIPHER_DEBUG
0f113f3e 966 fprintf(stderr, "Action = %d\n", rule);
018e57c7
DSH		 967#endif
968
0f113f3e
MC		 969 /* add the cipher if it has not been added yet. */
970 if (rule == CIPHER_ADD) {
971 /* reverse == 0 */
972 if (!curr->active) {
973 ll_append_tail(&head, curr, &tail);
974 curr->active = 1;
975 }
976 }
977 /* Move the added cipher to this location */
978 else if (rule == CIPHER_ORD) {
979 /* reverse == 0 */
980 if (curr->active) {
981 ll_append_tail(&head, curr, &tail);
982 }
983 } else if (rule == CIPHER_DEL) {
984 /* reverse == 1 */
985 if (curr->active) {
986 /*
987 * most recently deleted ciphersuites get best positions for
988 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
989 * in reverse to maintain the order)
990 */
991 ll_append_head(&head, curr, &tail);
992 curr->active = 0;
993 }
994 } else if (rule == CIPHER_KILL) {
995 /* reverse == 0 */
996 if (head == curr)
997 head = curr->next;
998 else
999 curr->prev->next = curr->next;
1000 if (tail == curr)
1001 tail = curr->prev;
1002 curr->active = 0;
1003 if (curr->next != NULL)
1004 curr->next->prev = curr->prev;
1005 if (curr->prev != NULL)
1006 curr->prev->next = curr->next;
1007 curr->next = NULL;
1008 curr->prev = NULL;
1009 }
1010 }
1011
1012 *head_p = head;
1013 *tail_p = tail;
1014}
018e57c7 1015
a717831d 1016static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
0f113f3e
MC		 1017 CIPHER_ORDER **tail_p)
1018{
90d9e49a
DSH		 1019 int32_t max_strength_bits;
1020 int i, *number_uses;
0f113f3e
MC		 1021 CIPHER_ORDER *curr;
1022
1023 /*
1024 * This routine sorts the ciphers with descending strength. The sorting
1025 * must keep the pre-sorted sequence, so we apply the normal sorting
1026 * routine as '+' movement to the end of the list.
1027 */
1028 max_strength_bits = 0;
1029 curr = *head_p;
1030 while (curr != NULL) {
1031 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
1032 max_strength_bits = curr->cipher->strength_bits;
1033 curr = curr->next;
1034 }
1035
b51bce94 1036 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
a71edf3b 1037 if (number_uses == NULL) {
0f113f3e
MC		 1038 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
1039 return (0);
1040 }
0f113f3e
MC		 1041
1042 /*
1043 * Now find the strength_bits values actually used
1044 */
1045 curr = *head_p;
1046 while (curr != NULL) {
1047 if (curr->active)
1048 number_uses[curr->cipher->strength_bits]++;
1049 curr = curr->next;
1050 }
1051 /*
1052 * Go through the list of used strength_bits values in descending
1053 * order.
1054 */
1055 for (i = max_strength_bits; i >= 0; i--)
1056 if (number_uses[i] > 0)
1057 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
1058 tail_p);
1059
1060 OPENSSL_free(number_uses);
1061 return (1);
1062}
018e57c7
DSH		 1063
1064static int ssl_cipher_process_rulestr(const char *rule_str,
0f113f3e
MC		 1065 CIPHER_ORDER **head_p,
1066 CIPHER_ORDER **tail_p,
1067 const SSL_CIPHER **ca_list, CERT *c)
1068{
90d9e49a 1069 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
0f113f3e
MC		 1070 const char *l, *buf;
1071 int j, multi, found, rule, retval, ok, buflen;
90d9e49a 1072 uint32_t cipher_id = 0;
0f113f3e
MC		 1073 char ch;
1074
1075 retval = 1;
1076 l = rule_str;
1077 for (;;) {
1078 ch = *l;
1079
1080 if (ch == '\0')
1081 break; /* done */
1082 if (ch == '-') {
1083 rule = CIPHER_DEL;
1084 l++;
1085 } else if (ch == '+') {
1086 rule = CIPHER_ORD;
1087 l++;
1088 } else if (ch == '!') {
1089 rule = CIPHER_KILL;
1090 l++;
1091 } else if (ch == '@') {
1092 rule = CIPHER_SPECIAL;
1093 l++;
1094 } else {
1095 rule = CIPHER_ADD;
1096 }
1097
1098 if (ITEM_SEP(ch)) {
1099 l++;
1100 continue;
1101 }
1102
1103 alg_mkey = 0;
1104 alg_auth = 0;
1105 alg_enc = 0;
1106 alg_mac = 0;
1107 alg_ssl = 0;
1108 algo_strength = 0;
1109
1110 for (;;) {
1111 ch = *l;
1112 buf = l;
1113 buflen = 0;
ca570cfd 1114#ifndef CHARSET_EBCDIC
0f113f3e
MC		 1115 while (((ch >= 'A') && (ch <= 'Z')) ||
1116 ((ch >= '0') && (ch <= '9')) ||
1117 ((ch >= 'a') && (ch <= 'z')) ||
1118 (ch == '-') || (ch == '.') || (ch == '='))
ca570cfd 1119#else
0f113f3e 1120 while (isalnum(ch) || (ch == '-') || (ch == '.') || (ch == '='))
ca570cfd 1121#endif
0f113f3e
MC		 1122 {
1123 ch = *(++l);
1124 buflen++;
1125 }
1126
1127 if (buflen == 0) {
1128 /*
1129 * We hit something we cannot deal with,
1130 * it is no command or separator nor
1131 * alphanumeric, so we call this an error.
1132 */
1133 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1134 SSL_R_INVALID_COMMAND);
1135 retval = found = 0;
1136 l++;
1137 break;
1138 }
1139
1140 if (rule == CIPHER_SPECIAL) {
1141 found = 0; /* unused -- avoid compiler warning */
1142 break; /* special treatment */
1143 }
1144
1145 /* check for multi-part specification */
1146 if (ch == '+') {
1147 multi = 1;
1148 l++;
1149 } else
1150 multi = 0;
1151
1152 /*
1153 * Now search for the cipher alias in the ca_list. Be careful
1154 * with the strncmp, because the "buflen" limitation
1155 * will make the rule "ADH:SOME" and the cipher
1156 * "ADH-MY-CIPHER" look like a match for buflen=3.
1157 * So additionally check whether the cipher name found
1158 * has the correct length. We can save a strlen() call:
1159 * just checking for the '\0' at the right place is
1160 * sufficient, we have to strncmp() anyway. (We cannot
1161 * use strcmp(), because buf is not '\0' terminated.)
1162 */
1163 j = found = 0;
1164 cipher_id = 0;
1165 while (ca_list[j]) {
86885c28
RS		 1166 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1167 && (ca_list[j]->name[buflen] == '\0')) {
0f113f3e
MC		 1168 found = 1;
1169 break;
1170 } else
1171 j++;
1172 }
1173
1174 if (!found)
1175 break; /* ignore this entry */
1176
1177 if (ca_list[j]->algorithm_mkey) {
1178 if (alg_mkey) {
1179 alg_mkey &= ca_list[j]->algorithm_mkey;
1180 if (!alg_mkey) {
1181 found = 0;
1182 break;
1183 }
1184 } else
1185 alg_mkey = ca_list[j]->algorithm_mkey;
1186 }
1187
1188 if (ca_list[j]->algorithm_auth) {
1189 if (alg_auth) {
1190 alg_auth &= ca_list[j]->algorithm_auth;
1191 if (!alg_auth) {
1192 found = 0;
1193 break;
1194 }
1195 } else
1196 alg_auth = ca_list[j]->algorithm_auth;
1197 }
1198
1199 if (ca_list[j]->algorithm_enc) {
1200 if (alg_enc) {
1201 alg_enc &= ca_list[j]->algorithm_enc;
1202 if (!alg_enc) {
1203 found = 0;
1204 break;
1205 }
1206 } else
1207 alg_enc = ca_list[j]->algorithm_enc;
1208 }
1209
1210 if (ca_list[j]->algorithm_mac) {
1211 if (alg_mac) {
1212 alg_mac &= ca_list[j]->algorithm_mac;
1213 if (!alg_mac) {
1214 found = 0;
1215 break;
1216 }
1217 } else
1218 alg_mac = ca_list[j]->algorithm_mac;
1219 }
1220
361a1191
KR		 1221 if (ca_list[j]->algo_strength) {
1222 if (algo_strength) {
1223 algo_strength &= ca_list[j]->algo_strength;
1224 if (!algo_strength) {
0f113f3e
MC		 1225 found = 0;
1226 break;
1227 }
1228 } else
361a1191 1229 algo_strength = ca_list[j]->algo_strength;
0f113f3e
MC		 1230 }
1231
c84f7f4a
MC		 1232 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1233 if (algo_strength & SSL_DEFAULT_MASK) {
1234 algo_strength &=
1235 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1236 ~SSL_DEFAULT_MASK;
1237 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1238 found = 0;
1239 break;
1240 }
1241 } else
1242 algo_strength |=
1243 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1244 }
1245
0f113f3e
MC		 1246 if (ca_list[j]->valid) {
1247 /*
1248 * explicit ciphersuite found; its protocol version does not
1249 * become part of the search pattern!
1250 */
1251
1252 cipher_id = ca_list[j]->id;
1253 } else {
1254 /*
1255 * not an explicit ciphersuite; only in this case, the
1256 * protocol version is considered part of the search pattern
1257 */
1258
1259 if (ca_list[j]->algorithm_ssl) {
1260 if (alg_ssl) {
1261 alg_ssl &= ca_list[j]->algorithm_ssl;
1262 if (!alg_ssl) {
1263 found = 0;
1264 break;
1265 }
1266 } else
1267 alg_ssl = ca_list[j]->algorithm_ssl;
1268 }
1269 }
1270
1271 if (!multi)
1272 break;
1273 }
1274
1275 /*
1276 * Ok, we have the rule, now apply it
1277 */
1278 if (rule == CIPHER_SPECIAL) { /* special command */
1279 ok = 0;
86885c28 1280 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0)
0f113f3e 1281 ok = ssl_cipher_strength_sort(head_p, tail_p);
86885c28 1282 else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
0f113f3e
MC		 1283 int level = buf[9] - '0';
1284 if (level < 0 || level > 5) {
1285 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1286 SSL_R_INVALID_COMMAND);
1287 } else {
1288 c->sec_level = level;
1289 ok = 1;
1290 }
1291 } else
1292 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1293 SSL_R_INVALID_COMMAND);
1294 if (ok == 0)
1295 retval = 0;
1296 /*
1297 * We do not support any "multi" options
1298 * together with "@", so throw away the
1299 * rest of the command, if any left, until
1300 * end or ':' is found.
1301 */
1302 while ((*l != '\0') && !ITEM_SEP(*l))
1303 l++;
1304 } else if (found) {
1305 ssl_cipher_apply_rule(cipher_id,
1306 alg_mkey, alg_auth, alg_enc, alg_mac,
1307 alg_ssl, algo_strength, rule, -1, head_p,
1308 tail_p);
1309 } else {
1310 while ((*l != '\0') && !ITEM_SEP(*l))
1311 l++;
1312 }
1313 if (*l == '\0')
1314 break; /* done */
1315 }
1316
1317 return (retval);
1318}
1319
14536c8c 1320#ifndef OPENSSL_NO_EC
2ea80354 1321static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
0f113f3e
MC		 1322 const char **prule_str)
1323{
1324 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
13e228d6 1325 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
0f113f3e 1326 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
13e228d6 1327 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
0f113f3e
MC		 1328 suiteb_comb2 = 1;
1329 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
13e228d6
DSH		 1330 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1331 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1332 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
0f113f3e 1333 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
13e228d6 1334 }
0f113f3e
MC		 1335
1336 if (suiteb_flags) {
1337 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1338 c->cert_flags |= suiteb_flags;
1339 } else
1340 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1341
1342 if (!suiteb_flags)
1343 return 1;
1344 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1345
1346 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
4fa52141
VD		 1347 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1348 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
0f113f3e
MC		 1349 return 0;
1350 }
10bf4fc2 1351# ifndef OPENSSL_NO_EC
0f113f3e
MC		 1352 switch (suiteb_flags) {
1353 case SSL_CERT_FLAG_SUITEB_128_LOS:
1354 if (suiteb_comb2)
1355 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1356 else
1357 *prule_str =
1358 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1359 break;
1360 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1361 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1362 break;
1363 case SSL_CERT_FLAG_SUITEB_192_LOS:
1364 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1365 break;
1366 }
0f113f3e
MC		 1367 return 1;
1368# else
1369 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1370 SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1371 return 0;
1372# endif
1373}
14536c8c 1374#endif
2ea80354 1375
0f113f3e
MC		 1376STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1377 **cipher_list, STACK_OF(SSL_CIPHER)
1378 **cipher_list_by_id,
1379 const char *rule_str, CERT *c)
1380{
1381 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
90d9e49a 1382 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac,
0f113f3e
MC		 1383 disabled_ssl;
1384 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1385 const char *rule_p;
1386 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1387 const SSL_CIPHER **ca_list = NULL;
1388
1389 /*
1390 * Return with error if nothing to do.
1391 */
1392 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1393 return NULL;
14536c8c 1394#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1395 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1396 return NULL;
14536c8c 1397#endif
2ea80354 1398
0f113f3e
MC		 1399 /*
1400 * To reduce the work to do we only want to process the compiled
1401 * in algorithms, so we first get the mask of disabled ciphers.
1402 */
633d49c7
DSH		 1403
1404 disabled_mkey = disabled_mkey_mask;
1405 disabled_auth = disabled_auth_mask;
1406 disabled_enc = disabled_enc_mask;
1407 disabled_mac = disabled_mac_mask;
1408 disabled_ssl = 0;
0f113f3e
MC		 1409
1410 /*
1411 * Now we have to collect the available ciphers from the compiled
1412 * in ciphers. We cannot get more than the number compiled in, so
1413 * it is used for allocation.
1414 */
1415 num_of_ciphers = ssl_method->num_ciphers();
55a9a16f 1416
b4faea50 1417 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
0f113f3e
MC		 1418 if (co_list == NULL) {
1419 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1420 return (NULL); /* Failure */
1421 }
1422
1423 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1424 disabled_mkey, disabled_auth, disabled_enc,
1425 disabled_mac, disabled_ssl, co_list, &head,
1426 &tail);
1427
1428 /* Now arrange all ciphers by preference: */
1429
1430 /*
1431 * Everything else being equal, prefer ephemeral ECDH over other key
1432 * exchange mechanisms
1433 */
1434 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1435 &tail);
1436 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1437 &tail);
1438
1439 /* AES is our preferred symmetric cipher */
1440 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head,
1441 &tail);
1442
1443 /* Temporarily enable everything else for sorting */
1444 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1445
1446 /* Low priority for MD5 */
1447 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1448 &tail);
1449
1450 /*
1451 * Move anonymous ciphers to the end. Usually, these will remain
1452 * disabled. (For applications that allow them, they aren't too bad, but
1453 * we prefer authenticated ciphers.)
1454 */
1455 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1456 &tail);
1457
0f113f3e
MC		 1458 /*
1459 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
1460 * &head, &tail);
1461 */
1462 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1463 &tail);
1464 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1465 &tail);
0f113f3e
MC		 1466
1467 /* RC4 is sort-of broken -- move the the end */
1468 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1469 &tail);
1470
1471 /*
1472 * Now sort by symmetric encryption strength. The above ordering remains
1473 * in force within each class
1474 */
1475 if (!ssl_cipher_strength_sort(&head, &tail)) {
1476 OPENSSL_free(co_list);
1477 return NULL;
1478 }
1479
1480 /* Now disable everything (maintaining the ordering!) */
1481 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1482
1483 /*
1484 * We also need cipher aliases for selecting based on the rule_str.
1485 * There might be two types of entries in the rule_str: 1) names
1486 * of ciphers themselves 2) aliases for groups of ciphers.
1487 * For 1) we need the available ciphers and for 2) the cipher
1488 * groups of cipher_aliases added together in one list (otherwise
1489 * we would be happy with just the cipher_aliases table).
1490 */
b6eb9827 1491 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
0f113f3e 1492 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
b4faea50 1493 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
0f113f3e
MC		 1494 if (ca_list == NULL) {
1495 OPENSSL_free(co_list);
1496 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1497 return (NULL); /* Failure */
1498 }
1499 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1500 disabled_mkey, disabled_auth, disabled_enc,
1501 disabled_mac, disabled_ssl, head);
1502
1503 /*
1504 * If the rule_string begins with DEFAULT, apply the default rule
1505 * before using the (possibly available) additional rules.
1506 */
1507 ok = 1;
1508 rule_p = rule_str;
1509 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1510 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1511 &head, &tail, ca_list, c);
1512 rule_p += 7;
1513 if (*rule_p == ':')
1514 rule_p++;
1515 }
1516
1517 if (ok && (strlen(rule_p) > 0))
1518 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1519
b548a1f1 1520 OPENSSL_free(ca_list); /* Not needed anymore */
0f113f3e
MC		 1521
1522 if (!ok) { /* Rule processing failure */
1523 OPENSSL_free(co_list);
1524 return (NULL);
1525 }
1526
1527 /*
1528 * Allocate new "cipherstack" for the result, return with error
1529 * if we cannot get one.
1530 */
1531 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1532 OPENSSL_free(co_list);
1533 return (NULL);
1534 }
1535
1536 /*
1537 * The cipher selection for the list is done. The ciphers are added
1538 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1539 */
1540 for (curr = head; curr != NULL; curr = curr->next) {
1541 if (curr->active
1542 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) {
1543 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1544 OPENSSL_free(co_list);
1545 sk_SSL_CIPHER_free(cipherstack);
1546 return NULL;
1547 }
d02b48c6 1548#ifdef CIPHER_DEBUG
0f113f3e 1549 fprintf(stderr, "<%s>\n", curr->cipher->name);
d02b48c6 1550#endif
0f113f3e
MC		 1551 }
1552 }
1553 OPENSSL_free(co_list); /* Not needed any longer */
1554
1555 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1556 if (tmp_cipher_list == NULL) {
1557 sk_SSL_CIPHER_free(cipherstack);
1558 return NULL;
1559 }
25aaa98a 1560 sk_SSL_CIPHER_free(*cipher_list);
0f113f3e
MC		 1561 *cipher_list = cipherstack;
1562 if (*cipher_list_by_id != NULL)
1563 sk_SSL_CIPHER_free(*cipher_list_by_id);
1564 *cipher_list_by_id = tmp_cipher_list;
1565 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,
1566 ssl_cipher_ptr_id_cmp);
1567
1568 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1569 return (cipherstack);
1570}
d02b48c6 1571
7689ed34 1572char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
0f113f3e 1573{
361a1191 1574 const char *ver;
0f113f3e 1575 const char *kx, *au, *enc, *mac;
baf245ec 1576 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
0f113f3e 1577 static const char *format =
361a1191 1578 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
0f113f3e 1579
baf245ec
RS		 1580 if (buf == NULL) {
1581 len = 128;
1582 buf = OPENSSL_malloc(len);
1583 if (buf == NULL)
1584 return NULL;
1585 } else if (len < 128)
1586 return NULL;
1587
0f113f3e
MC		 1588 alg_mkey = cipher->algorithm_mkey;
1589 alg_auth = cipher->algorithm_auth;
1590 alg_enc = cipher->algorithm_enc;
1591 alg_mac = cipher->algorithm_mac;
0f113f3e 1592
baf245ec 1593 ver = SSL_CIPHER_get_version(cipher);
0f113f3e
MC		 1594
1595 switch (alg_mkey) {
1596 case SSL_kRSA:
361a1191 1597 kx = "RSA";
0f113f3e 1598 break;
0f113f3e 1599 case SSL_kDHE:
361a1191 1600 kx = "DH";
0f113f3e 1601 break;
0f113f3e
MC		 1602 case SSL_kECDHE:
1603 kx = "ECDH";
1604 break;
1605 case SSL_kPSK:
1606 kx = "PSK";
1607 break;
8baac6a2
DSH		 1608 case SSL_kRSAPSK:
1609 kx = "RSAPSK";
1610 break;
1611 case SSL_kECDHEPSK:
1612 kx = "ECDHEPSK";
1613 break;
1614 case SSL_kDHEPSK:
1615 kx = "DHEPSK";
1616 break;
0f113f3e
MC		 1617 case SSL_kSRP:
1618 kx = "SRP";
1619 break;
1620 case SSL_kGOST:
1621 kx = "GOST";
1622 break;
1623 default:
1624 kx = "unknown";
1625 }
1626
1627 switch (alg_auth) {
1628 case SSL_aRSA:
1629 au = "RSA";
1630 break;
1631 case SSL_aDSS:
1632 au = "DSS";
1633 break;
0f113f3e
MC		 1634 case SSL_aNULL:
1635 au = "None";
1636 break;
1637 case SSL_aECDSA:
1638 au = "ECDSA";
1639 break;
1640 case SSL_aPSK:
1641 au = "PSK";
1642 break;
1643 case SSL_aSRP:
1644 au = "SRP";
1645 break;
0f113f3e
MC		 1646 case SSL_aGOST01:
1647 au = "GOST01";
1648 break;
e44380a9
DB		 1649 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1650 case (SSL_aGOST12 | SSL_aGOST01):
1651 au = "GOST12";
1652 break;
0f113f3e
MC		 1653 default:
1654 au = "unknown";
1655 break;
1656 }
1657
1658 switch (alg_enc) {
1659 case SSL_DES:
361a1191 1660 enc = "DES(56)";
0f113f3e
MC		 1661 break;
1662 case SSL_3DES:
1663 enc = "3DES(168)";
1664 break;
1665 case SSL_RC4:
361a1191 1666 enc = "RC4(128)";
0f113f3e
MC		 1667 break;
1668 case SSL_RC2:
361a1191 1669 enc = "RC2(128)";
0f113f3e
MC		 1670 break;
1671 case SSL_IDEA:
1672 enc = "IDEA(128)";
1673 break;
1674 case SSL_eNULL:
1675 enc = "None";
1676 break;
1677 case SSL_AES128:
1678 enc = "AES(128)";
1679 break;
1680 case SSL_AES256:
1681 enc = "AES(256)";
1682 break;
1683 case SSL_AES128GCM:
1684 enc = "AESGCM(128)";
1685 break;
1686 case SSL_AES256GCM:
1687 enc = "AESGCM(256)";
1688 break;
e75c5a79
DSH		 1689 case SSL_AES128CCM:
1690 enc = "AESCCM(128)";
1691 break;
1692 case SSL_AES256CCM:
1693 enc = "AESCCM(256)";
1694 break;
3d3701ea
DSH		 1695 case SSL_AES128CCM8:
1696 enc = "AESCCM8(128)";
1697 break;
1698 case SSL_AES256CCM8:
1699 enc = "AESCCM8(256)";
1700 break;
0f113f3e
MC		 1701 case SSL_CAMELLIA128:
1702 enc = "Camellia(128)";
1703 break;
1704 case SSL_CAMELLIA256:
1705 enc = "Camellia(256)";
1706 break;
1707 case SSL_SEED:
1708 enc = "SEED(128)";
1709 break;
1710 case SSL_eGOST2814789CNT:
e44380a9 1711 case SSL_eGOST2814789CNT12:
0f113f3e
MC		 1712 enc = "GOST89(256)";
1713 break;
0d3587c7
MC		 1714 case SSL_CHACHA20POLY1305:
1715 enc = "CHACHA20/POLY1305(256)";
1716 break;
0f113f3e
MC		 1717 default:
1718 enc = "unknown";
1719 break;
1720 }
1721
1722 switch (alg_mac) {
1723 case SSL_MD5:
1724 mac = "MD5";
1725 break;
1726 case SSL_SHA1:
1727 mac = "SHA1";
1728 break;
1729 case SSL_SHA256:
1730 mac = "SHA256";
1731 break;
1732 case SSL_SHA384:
1733 mac = "SHA384";
1734 break;
1735 case SSL_AEAD:
1736 mac = "AEAD";
1737 break;
1738 case SSL_GOST89MAC:
e44380a9 1739 case SSL_GOST89MAC12:
0f113f3e
MC		 1740 mac = "GOST89";
1741 break;
1742 case SSL_GOST94:
1743 mac = "GOST94";
1744 break;
e44380a9
DB		 1745 case SSL_GOST12_256:
1746 case SSL_GOST12_512:
1747 mac = "GOST2012";
1748 break;
0f113f3e
MC		 1749 default:
1750 mac = "unknown";
1751 break;
1752 }
1753
361a1191 1754 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
55a9a16f 1755
0f113f3e
MC		 1756 return (buf);
1757}
d02b48c6 1758
0821bcd4 1759char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
0f113f3e 1760{
baf245ec 1761 uint32_t alg_ssl;
0f113f3e
MC		 1762
1763 if (c == NULL)
baf245ec
RS		 1764 return "(NONE)";
1765 alg_ssl = c->algorithm_ssl;
1766
1767 if (alg_ssl & SSL_SSLV3)
1768 return "SSLv3";
1769 if (alg_ssl & SSL_TLSV1)
1770 return "TLSv1.0";
1771 if (alg_ssl & SSL_TLSV1_2)
1772 return "TLSv1.2";
1773 return "unknown";
0f113f3e 1774}
d02b48c6
RE		 1775
1776/* return the actual cipher being used */
0821bcd4 1777const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
0f113f3e
MC		 1778{
1779 if (c != NULL)
1780 return (c->name);
1781 return ("(NONE)");
1782}
d02b48c6 1783
657e60fa 1784/* number of bits for symmetric cipher */
1c86d8fd 1785int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
0f113f3e 1786{
1c86d8fd 1787 int ret = 0;
0f113f3e
MC		 1788
1789 if (c != NULL) {
1790 if (alg_bits != NULL)
1c86d8fd
VD		 1791 *alg_bits = (int) c->alg_bits;
1792 ret = (int) c->strength_bits;
0f113f3e 1793 }
90d9e49a 1794 return ret;
0f113f3e 1795}
d02b48c6 1796
90d9e49a 1797uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
0f113f3e
MC		 1798{
1799 return c->id;
1800}
08557cf2 1801
6b691a5c 1802SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
0f113f3e
MC		 1803{
1804 SSL_COMP *ctmp;
1805 int i, nn;
1806
1807 if ((n == 0) || (sk == NULL))
1808 return (NULL);
1809 nn = sk_SSL_COMP_num(sk);
1810 for (i = 0; i < nn; i++) {
1811 ctmp = sk_SSL_COMP_value(sk, i);
1812 if (ctmp->id == n)
1813 return (ctmp);
1814 }
1815 return (NULL);
1816}
413c4f45 1817
09b6c2ef 1818#ifdef OPENSSL_NO_COMP
9a555706 1819STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
0f113f3e
MC		 1820{
1821 return NULL;
1822}
9a555706
RS		 1823STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1824 *meths)
0f113f3e 1825{
9a555706 1826 return meths;
0f113f3e 1827}
9a555706 1828void SSL_COMP_free_compression_methods(void)
0f113f3e 1829{
0f113f3e 1830}
9a555706
RS		 1831int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1832{
1833 return 1;
1834}
1835
09b6c2ef 1836#else
6b691a5c 1837STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
0f113f3e
MC		 1838{
1839 load_builtin_compressions();
1840 return (ssl_comp_methods);
1841}
1842
1843STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1844 *meths)
1845{
1846 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1847 ssl_comp_methods = meths;
1848 return old_meths;
1849}
cbb67448 1850
db7b5e0d 1851static void cmeth_free(SSL_COMP *cm)
0f113f3e
MC		 1852{
1853 OPENSSL_free(cm);
1854}
db7b5e0d
DSH		 1855
1856void SSL_COMP_free_compression_methods(void)
0f113f3e
MC		 1857{
1858 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1859 ssl_comp_methods = NULL;
1860 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1861}
db7b5e0d 1862
6b691a5c 1863int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
0f113f3e
MC		 1864{
1865 SSL_COMP *comp;
413c4f45 1866
9a555706 1867 if (cm == NULL || COMP_get_type(cm) == NID_undef)
0f113f3e 1868 return 1;
9f495243 1869
50e735f9
MC		 1870 /*-
1871 * According to draft-ietf-tls-compression-04.txt, the
1872 * compression number ranges should be the following:
1873 *
1874 * 0 to 63: methods defined by the IETF
1875 * 64 to 192: external party methods assigned by IANA
1876 * 193 to 255: reserved for private use
1877 */
0f113f3e
MC		 1878 if (id < 193 || id > 255) {
1879 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1880 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1881 return 0;
1882 }
1883
bbd86bf5 1884 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
b4faea50 1885 comp = OPENSSL_malloc(sizeof(*comp));
0f113f3e 1886 if (comp == NULL) {
bbd86bf5 1887 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e
MC		 1888 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1889 return (1);
1890 }
1891
1892 comp->id = id;
1893 comp->method = cm;
1894 load_builtin_compressions();
1895 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1896 OPENSSL_free(comp);
bbd86bf5 1897 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e
MC		 1898 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1899 SSL_R_DUPLICATE_COMPRESSION_ID);
1900 return (1);
bbd86bf5
RS		 1901 }
1902 if ((ssl_comp_methods == NULL)
0f113f3e
MC		 1903 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
1904 OPENSSL_free(comp);
bbd86bf5 1905 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e
MC		 1906 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1907 return (1);
0f113f3e 1908 }
bbd86bf5
RS		 1909 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1910 return (0);
0f113f3e 1911}
9a555706 1912#endif
377dcdba
RL		 1913
1914const char *SSL_COMP_get_name(const COMP_METHOD *comp)
0f113f3e 1915{
9a555706
RS		 1916#ifndef OPENSSL_NO_COMP
1917 return comp ? COMP_get_name(comp) : NULL;
1918#else
0f113f3e 1919 return NULL;
09b6c2ef 1920#endif
9a555706
RS		 1921}
1922
d47c01a3
DSH		 1923/* For a cipher return the index corresponding to the certificate type */
1924int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
0f113f3e 1925{
ce0c1f2b 1926 uint32_t alg_a;
0f113f3e 1927
0f113f3e
MC		 1928 alg_a = c->algorithm_auth;
1929
ce0c1f2b 1930 if (alg_a & SSL_aECDSA)
0f113f3e 1931 return SSL_PKEY_ECC;
0f113f3e
MC		 1932 else if (alg_a & SSL_aDSS)
1933 return SSL_PKEY_DSA_SIGN;
1934 else if (alg_a & SSL_aRSA)
1935 return SSL_PKEY_RSA_ENC;
e44380a9
DB		 1936 else if (alg_a & SSL_aGOST12)
1937 return SSL_PKEY_GOST_EC;
0f113f3e
MC		 1938 else if (alg_a & SSL_aGOST01)
1939 return SSL_PKEY_GOST01;
e44380a9 1940
0f113f3e
MC		 1941 return -1;
1942}
d47c01a3 1943
94a209d8 1944const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
0f113f3e
MC		 1945{
1946 const SSL_CIPHER *c;
1947 c = ssl->method->get_cipher_by_char(ptr);
1948 if (c == NULL || c->valid == 0)
1949 return NULL;
1950 return c;
1951}
94a209d8
DSH		 1952
1953const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
0f113f3e
MC		 1954{
1955 return ssl->method->get_cipher_by_char(ptr);
1956}
98c9ce2f
DSH		 1957
1958int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1959{
1960 int i;
1961 if (c == NULL)
1962 return -1;
1963 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
1964 if (i == -1)
1965 return -1;
1966 return ssl_cipher_table_cipher[i].nid;
1967}
1968
1969int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1970{
1971 int i;
1972 if (c == NULL)
1973 return -1;
1974 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
1975 if (i == -1)
1976 return -1;
1977 return ssl_cipher_table_mac[i].nid;
1978}
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