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Add two missing SSL_CIPHER_* functions
[thirdparty/openssl.git] / ssl / ssl_ciph.c
CommitLineData
846e33c7 1/*
bbb4ceb8 2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
aa8f3d76 3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
c80149d9 4 * Copyright 2005 Nokia. All rights reserved.
675f605d 5 *
846e33c7
RS		 6 * Licensed under the OpenSSL license (the "License"). You may not use
7 * this file except in compliance with the License. You can obtain a copy
8 * in the file LICENSE in the source distribution or at
9 * https://www.openssl.org/source/license.html
675f605d 10 */
846e33c7 11
d02b48c6 12#include <stdio.h>
5fd1478d 13#include <ctype.h>
ec577822 14#include <openssl/objects.h>
3c27208f
RS		 15#include <openssl/comp.h>
16#include <openssl/engine.h>
5c4328f0 17#include <openssl/crypto.h>
677963e5 18#include "internal/nelem.h"
d02b48c6 19#include "ssl_locl.h"
c2e4e5d2 20#include "internal/thread_once.h"
67dc995e 21#include "internal/cryptlib.h"
d02b48c6 22
0f113f3e
MC		 23#define SSL_ENC_DES_IDX 0
24#define SSL_ENC_3DES_IDX 1
25#define SSL_ENC_RC4_IDX 2
26#define SSL_ENC_RC2_IDX 3
27#define SSL_ENC_IDEA_IDX 4
28#define SSL_ENC_NULL_IDX 5
29#define SSL_ENC_AES128_IDX 6
30#define SSL_ENC_AES256_IDX 7
31#define SSL_ENC_CAMELLIA128_IDX 8
32#define SSL_ENC_CAMELLIA256_IDX 9
33#define SSL_ENC_GOST89_IDX 10
34#define SSL_ENC_SEED_IDX 11
35#define SSL_ENC_AES128GCM_IDX 12
36#define SSL_ENC_AES256GCM_IDX 13
e75c5a79
DSH		 37#define SSL_ENC_AES128CCM_IDX 14
38#define SSL_ENC_AES256CCM_IDX 15
3d3701ea
DSH		 39#define SSL_ENC_AES128CCM8_IDX 16
40#define SSL_ENC_AES256CCM8_IDX 17
e44380a9 41#define SSL_ENC_GOST8912_IDX 18
a76ba82c 42#define SSL_ENC_CHACHA_IDX 19
bc326738
JS		 43#define SSL_ENC_ARIA128GCM_IDX 20
44#define SSL_ENC_ARIA256GCM_IDX 21
45#define SSL_ENC_NUM_IDX 22
0f113f3e 46
98c9ce2f
DSH		 47/* NB: make sure indices in these tables match values above */
48
49typedef struct {
90d9e49a 50 uint32_t mask;
98c9ce2f
DSH		 51 int nid;
52} ssl_cipher_table;
53
54/* Table of NIDs for each cipher */
55static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
56 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
57 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
58 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
59 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
60 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
61 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
62 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
63 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
64 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
65 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
66 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
67 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
68 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
e75c5a79
DSH		 69 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
70 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
3d3701ea
DSH		 71 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
72 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
e44380a9 73 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
bc326738
JS		 74 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
75 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
76 {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
77 {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
98c9ce2f
DSH		 78};
79
d42d0a4d 80static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX];
0f113f3e
MC		 81
82#define SSL_COMP_NULL_IDX 0
83#define SSL_COMP_ZLIB_IDX 1
84#define SSL_COMP_NUM_IDX 2
85
86static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
87
e4ad0763 88#ifndef OPENSSL_NO_COMP
16203f7b 89static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
e4ad0763 90#endif
16203f7b 91
0f113f3e
MC		 92/*
93 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
94 * in the ssl_locl.h
b948e2c5 95 */
98c9ce2f 96
0f113f3e 97#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
98c9ce2f
DSH		 98
99/* NB: make sure indices in this table matches values above */
100static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
101 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
102 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
103 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
104 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
105 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
e44380a9 106 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
a230b26e
EK		 107 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
108 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
109 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
7afd2312
DSH		 110 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
111 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
112 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
98c9ce2f
DSH		 113};
114
0f113f3e 115static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
7afd2312 116 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
0f113f3e
MC		 117};
118
a230b26e 119/* *INDENT-OFF* */
3ec13237 120static const ssl_cipher_table ssl_cipher_table_kx[] = {
a230b26e
EK		 121 {SSL_kRSA, NID_kx_rsa},
122 {SSL_kECDHE, NID_kx_ecdhe},
123 {SSL_kDHE, NID_kx_dhe},
124 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
125 {SSL_kDHEPSK, NID_kx_dhe_psk},
126 {SSL_kRSAPSK, NID_kx_rsa_psk},
127 {SSL_kPSK, NID_kx_psk},
128 {SSL_kSRP, NID_kx_srp},
7114af30
DSH		 129 {SSL_kGOST, NID_kx_gost},
130 {SSL_kANY, NID_kx_any}
3ec13237
TS		 131};
132
133static const ssl_cipher_table ssl_cipher_table_auth[] = {
a230b26e
EK		 134 {SSL_aRSA, NID_auth_rsa},
135 {SSL_aECDSA, NID_auth_ecdsa},
136 {SSL_aPSK, NID_auth_psk},
137 {SSL_aDSS, NID_auth_dss},
138 {SSL_aGOST01, NID_auth_gost01},
139 {SSL_aGOST12, NID_auth_gost12},
140 {SSL_aSRP, NID_auth_srp},
7114af30
DSH		 141 {SSL_aNULL, NID_auth_null},
142 {SSL_aANY, NID_auth_any}
3ec13237 143};
a230b26e 144/* *INDENT-ON* */
3ec13237 145
98c9ce2f
DSH		 146/* Utility function for table lookup */
147static int ssl_cipher_info_find(const ssl_cipher_table * table,
90d9e49a 148 size_t table_cnt, uint32_t mask)
98c9ce2f
DSH		 149{
150 size_t i;
151 for (i = 0; i < table_cnt; i++, table++) {
152 if (table->mask == mask)
348240c6 153 return (int)i;
98c9ce2f
DSH		 154 }
155 return -1;
156}
157
158#define ssl_cipher_info_lookup(table, x) \
b6eb9827 159 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
98c9ce2f 160
0f113f3e
MC		 161/*
162 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
163 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
164 * found
165 */
166static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
e44380a9 167 /* MD5, SHA, GOST94, MAC89 */
0f113f3e 168 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
e44380a9
DB		 169 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
170 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
171 /* GOST2012_512 */
172 EVP_PKEY_HMAC,
0f113f3e
MC		 173};
174
8c1a5343 175static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX];
0f113f3e
MC		 176
177#define CIPHER_ADD 1
178#define CIPHER_KILL 2
179#define CIPHER_DEL 3
180#define CIPHER_ORD 4
181#define CIPHER_SPECIAL 5
a556f342
EK		 182/*
183 * Bump the ciphers to the top of the list.
184 * This rule isn't currently supported by the public cipherstring API.
185 */
186#define CIPHER_BUMP 6
0f113f3e
MC		 187
188typedef struct cipher_order_st {
189 const SSL_CIPHER *cipher;
190 int active;
191 int dead;
192 struct cipher_order_st *next, *prev;
193} CIPHER_ORDER;
194
195static const SSL_CIPHER cipher_aliases[] = {
196 /* "ALL" doesn't include eNULL (must be specifically enabled) */
bbb4ceb8 197 {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
0f113f3e 198 /* "COMPLEMENTOFALL" */
bbb4ceb8 199 {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
0f113f3e
MC		 200
201 /*
202 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
203 * ALL!)
204 */
bbb4ceb8 205 {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
0f113f3e
MC		 206
207 /*
208 * key exchange aliases (some of those using only a single bit here
209 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
210 * combines DHE_DSS and DHE_RSA)
211 */
bbb4ceb8 212 {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
0f113f3e 213
bbb4ceb8
PY		 214 {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
215 {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
216 {0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
0f113f3e 217
bbb4ceb8
PY		 218 {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
219 {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
220 {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
0f113f3e 221
bbb4ceb8
PY		 222 {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
223 {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
224 {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
225 {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
226 {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
227 {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
0f113f3e
MC		 228
229 /* server authentication aliases */
bbb4ceb8
PY		 230 {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
231 {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
232 {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
233 {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
234 {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
235 {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
236 {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
237 {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
238 {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
239 {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
240 {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
0f113f3e
MC		 241
242 /* aliases combining key exchange and server authentication */
bbb4ceb8
PY		 243 {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
244 {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
245 {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
246 {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
247 {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
248 {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
249 {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
250 {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
251 {0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
252 {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
0f113f3e
MC		 253
254 /* symmetric encryption aliases */
bbb4ceb8
PY		 255 {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
256 {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
257 {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
258 {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
259 {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
260 {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
261 {0, SSL_TXT_GOST, NULL, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12},
262 {0, SSL_TXT_AES128, NULL, 0, 0, 0,
e5f969a8 263 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
bbb4ceb8 264 {0, SSL_TXT_AES256, NULL, 0, 0, 0,
e5f969a8 265 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
bbb4ceb8
PY		 266 {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
267 {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
268 {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
e5f969a8 269 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
bbb4ceb8
PY		 270 {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
271 {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
272 {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
273 {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
274 {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
0f113f3e 275
bc326738
JS		 276 {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
277 {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
278 {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
279
0f113f3e 280 /* MAC aliases */
bbb4ceb8
PY		 281 {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
282 {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
283 {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
284 {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
285 {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
286 {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
287 {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
288 {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
0f113f3e
MC		 289
290 /* protocol version aliases */
bbb4ceb8
PY		 291 {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
292 {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
293 {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
294 {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
0f113f3e 295
0f113f3e 296 /* strength classes */
bbb4ceb8
PY		 297 {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
298 {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
299 {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
0f113f3e 300 /* FIPS 140-2 approved ciphersuite */
bbb4ceb8 301 {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
0f113f3e
MC		 302
303 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
bbb4ceb8 304 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
e5f969a8 305 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
bbb4ceb8 306 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
e5f969a8 307 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
0f113f3e
MC		 308
309};
310
311/*
312 * Search for public key algorithm with given name and return its pkey_id if
313 * it is available. Otherwise return 0
81025661 314 */
70531c14
DSH		 315#ifdef OPENSSL_NO_ENGINE
316
81025661 317static int get_optional_pkey_id(const char *pkey_name)
0f113f3e
MC		 318{
319 const EVP_PKEY_ASN1_METHOD *ameth;
320 int pkey_id = 0;
321 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
5f3d93e4 322 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
bbb4ceb8 323 ameth) > 0)
5f3d93e4 324 return pkey_id;
5f3d93e4 325 return 0;
0f113f3e 326}
d02b48c6 327
70531c14
DSH		 328#else
329
330static int get_optional_pkey_id(const char *pkey_name)
0f113f3e
MC		 331{
332 const EVP_PKEY_ASN1_METHOD *ameth;
333 ENGINE *tmpeng = NULL;
334 int pkey_id = 0;
335 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
336 if (ameth) {
5f3d93e4
MC		 337 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
338 ameth) <= 0)
339 pkey_id = 0;
0f113f3e 340 }
7c96dbcd 341 ENGINE_finish(tmpeng);
0f113f3e
MC		 342 return pkey_id;
343}
70531c14
DSH		 344
345#endif
346
633d49c7 347/* masks of disabled algorithms */
90d9e49a
DSH		 348static uint32_t disabled_enc_mask;
349static uint32_t disabled_mac_mask;
350static uint32_t disabled_mkey_mask;
351static uint32_t disabled_auth_mask;
633d49c7 352
380a522f 353int ssl_load_ciphers(void)
0f113f3e 354{
98c9ce2f
DSH		 355 size_t i;
356 const ssl_cipher_table *t;
748f2546 357
633d49c7 358 disabled_enc_mask = 0;
748f2546 359 ssl_sort_cipher_list();
98c9ce2f 360 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
633d49c7 361 if (t->nid == NID_undef) {
98c9ce2f 362 ssl_cipher_methods[i] = NULL;
633d49c7
DSH		 363 } else {
364 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
365 ssl_cipher_methods[i] = cipher;
366 if (cipher == NULL)
367 disabled_enc_mask |= t->mask;
368 }
0f113f3e 369 }
633d49c7 370 disabled_mac_mask = 0;
98c9ce2f 371 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
633d49c7
DSH		 372 const EVP_MD *md = EVP_get_digestbynid(t->nid);
373 ssl_digest_methods[i] = md;
374 if (md == NULL) {
375 disabled_mac_mask |= t->mask;
376 } else {
8c1a5343 377 int tmpsize = EVP_MD_size(md);
380a522f
MC		 378 if (!ossl_assert(tmpsize >= 0))
379 return 0;
8c1a5343 380 ssl_mac_secret_size[i] = tmpsize;
98c9ce2f
DSH		 381 }
382 }
383 /* Make sure we can access MD5 and SHA1 */
380a522f
MC		 384 if (!ossl_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL))
385 return 0;
386 if (!ossl_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL))
387 return 0;
633d49c7
DSH		 388
389 disabled_mkey_mask = 0;
390 disabled_auth_mask = 0;
391
392#ifdef OPENSSL_NO_RSA
332a251f 393 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
633d49c7
DSH		 394 disabled_auth_mask |= SSL_aRSA;
395#endif
396#ifdef OPENSSL_NO_DSA
397 disabled_auth_mask |= SSL_aDSS;
398#endif
399#ifdef OPENSSL_NO_DH
bc71f910 400 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
633d49c7
DSH		 401#endif
402#ifdef OPENSSL_NO_EC
ce0c1f2b
DSH		 403 disabled_mkey_mask |= SSL_kECDHEPSK;
404 disabled_auth_mask |= SSL_aECDSA;
633d49c7
DSH		 405#endif
406#ifdef OPENSSL_NO_PSK
332a251f 407 disabled_mkey_mask |= SSL_PSK;
633d49c7
DSH		 408 disabled_auth_mask |= SSL_aPSK;
409#endif
410#ifdef OPENSSL_NO_SRP
411 disabled_mkey_mask |= SSL_kSRP;
412#endif
413
414 /*
415 * Check for presence of GOST 34.10 algorithms, and if they are not
416 * present, disable appropriate auth and key exchange
417 */
e1fa652d 418 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
bbb4ceb8 419 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
e1fa652d 420 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
bbb4ceb8 421 else
633d49c7 422 disabled_mac_mask |= SSL_GOST89MAC;
633d49c7 423
a230b26e
EK		 424 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
425 get_optional_pkey_id("gost-mac-12");
bbb4ceb8 426 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
e44380a9 427 ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
bbb4ceb8 428 else
e44380a9 429 disabled_mac_mask |= SSL_GOST89MAC12;
e44380a9 430
633d49c7 431 if (!get_optional_pkey_id("gost2001"))
e44380a9
DB		 432 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
433 if (!get_optional_pkey_id("gost2012_256"))
434 disabled_auth_mask |= SSL_aGOST12;
435 if (!get_optional_pkey_id("gost2012_512"))
436 disabled_auth_mask |= SSL_aGOST12;
633d49c7
DSH		 437 /*
438 * Disable GOST key exchange if no GOST signature algs are available *
439 */
a230b26e
EK		 440 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
441 (SSL_aGOST01 | SSL_aGOST12))
633d49c7 442 disabled_mkey_mask |= SSL_kGOST;
380a522f
MC		 443
444 return 1;
0f113f3e
MC		 445}
446
09b6c2ef
DSH		 447#ifndef OPENSSL_NO_COMP
448
0f113f3e
MC		 449static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
450{
451 return ((*a)->id - (*b)->id);
452}
7ba666fa 453
c2e4e5d2 454DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
0f113f3e 455{
16203f7b
AG		 456 SSL_COMP *comp = NULL;
457 COMP_METHOD *method = COMP_zlib();
458
459 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
460 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
461
462 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
463 comp = OPENSSL_malloc(sizeof(*comp));
464 if (comp != NULL) {
465 comp->method = method;
466 comp->id = SSL_COMP_ZLIB_IDX;
467 comp->name = COMP_get_name(method);
468 sk_SSL_COMP_push(ssl_comp_methods, comp);
469 sk_SSL_COMP_sort(ssl_comp_methods);
0f113f3e
MC		 470 }
471 }
16203f7b 472 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
c2e4e5d2 473 return 1;
16203f7b 474}
0f113f3e 475
912c258f 476static int load_builtin_compressions(void)
16203f7b 477{
912c258f 478 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
0f113f3e 479}
09b6c2ef 480#endif
7ba666fa 481
0821bcd4 482int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
0f113f3e 483 const EVP_MD **md, int *mac_pkey_type,
8c1a5343 484 size_t *mac_secret_size, SSL_COMP **comp, int use_etm)
0f113f3e
MC		 485{
486 int i;
487 const SSL_CIPHER *c;
488
489 c = s->cipher;
490 if (c == NULL)
bbb4ceb8 491 return 0;
0f113f3e
MC		 492 if (comp != NULL) {
493 SSL_COMP ctmp;
09b6c2ef 494#ifndef OPENSSL_NO_COMP
912c258f
RL		 495 if (!load_builtin_compressions()) {
496 /*
497 * Currently don't care, since a failure only means that
498 * ssl_comp_methods is NULL, which is perfectly OK
499 */
500 }
09b6c2ef 501#endif
0f113f3e
MC		 502 *comp = NULL;
503 ctmp.id = s->compress_meth;
504 if (ssl_comp_methods != NULL) {
505 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
506 if (i >= 0)
507 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
508 else
509 *comp = NULL;
510 }
69f68237 511 /* If were only interested in comp then return success */
61986d32 512 if ((enc == NULL) && (md == NULL))
69f68237 513 return 1;
0f113f3e
MC		 514 }
515
516 if ((enc == NULL) || (md == NULL))
69f68237 517 return 0;
0f113f3e 518
98c9ce2f 519 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
0f113f3e 520
bbb4ceb8 521 if (i == -1) {
0f113f3e 522 *enc = NULL;
bbb4ceb8 523 } else {
0f113f3e
MC		 524 if (i == SSL_ENC_NULL_IDX)
525 *enc = EVP_enc_null();
526 else
527 *enc = ssl_cipher_methods[i];
528 }
529
98c9ce2f
DSH		 530 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
531 if (i == -1) {
0f113f3e
MC		 532 *md = NULL;
533 if (mac_pkey_type != NULL)
534 *mac_pkey_type = NID_undef;
535 if (mac_secret_size != NULL)
536 *mac_secret_size = 0;
537 if (c->algorithm_mac == SSL_AEAD)
538 mac_pkey_type = NULL;
539 } else {
540 *md = ssl_digest_methods[i];
541 if (mac_pkey_type != NULL)
542 *mac_pkey_type = ssl_mac_pkey_id[i];
543 if (mac_secret_size != NULL)
544 *mac_secret_size = ssl_mac_secret_size[i];
545 }
546
547 if ((*enc != NULL) &&
548 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
549 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
550 const EVP_CIPHER *evp;
551
552 if (use_etm)
553 return 1;
554
555 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
556 s->ssl_version < TLS1_VERSION)
557 return 1;
558
0f113f3e
MC		 559 if (c->algorithm_enc == SSL_RC4 &&
560 c->algorithm_mac == SSL_MD5 &&
561 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
562 *enc = evp, *md = NULL;
563 else if (c->algorithm_enc == SSL_AES128 &&
564 c->algorithm_mac == SSL_SHA1 &&
565 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
566 *enc = evp, *md = NULL;
567 else if (c->algorithm_enc == SSL_AES256 &&
568 c->algorithm_mac == SSL_SHA1 &&
569 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
570 *enc = evp, *md = NULL;
571 else if (c->algorithm_enc == SSL_AES128 &&
572 c->algorithm_mac == SSL_SHA256 &&
573 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
574 *enc = evp, *md = NULL;
575 else if (c->algorithm_enc == SSL_AES256 &&
576 c->algorithm_mac == SSL_SHA256 &&
577 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
578 *enc = evp, *md = NULL;
bbb4ceb8
PY		 579 return 1;
580 } else {
581 return 0;
582 }
0f113f3e
MC		 583}
584
152fbc28 585const EVP_MD *ssl_md(int idx)
81025661 586{
28ba2541
DSH		 587 idx &= SSL_HANDSHAKE_MAC_MASK;
588 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
589 return NULL;
590 return ssl_digest_methods[idx];
591}
592
593const EVP_MD *ssl_handshake_md(SSL *s)
594{
152fbc28 595 return ssl_md(ssl_get_algorithm2(s));
28ba2541
DSH		 596}
597
598const EVP_MD *ssl_prf_md(SSL *s)
599{
152fbc28 600 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
81025661
DSH		 601}
602
58964a49 603#define ITEM_SEP(a) \
0f113f3e 604 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
58964a49 605
6b691a5c 606static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
0f113f3e
MC		 607 CIPHER_ORDER **tail)
608{
609 if (curr == *tail)
610 return;
611 if (curr == *head)
612 *head = curr->next;
613 if (curr->prev != NULL)
614 curr->prev->next = curr->next;
615 if (curr->next != NULL)
616 curr->next->prev = curr->prev;
617 (*tail)->next = curr;
618 curr->prev = *tail;
619 curr->next = NULL;
620 *tail = curr;
621}
58964a49 622
fd5bc65c 623static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
0f113f3e
MC		 624 CIPHER_ORDER **tail)
625{
626 if (curr == *head)
627 return;
628 if (curr == *tail)
629 *tail = curr->prev;
630 if (curr->next != NULL)
631 curr->next->prev = curr->prev;
632 if (curr->prev != NULL)
633 curr->prev->next = curr->next;
634 (*head)->prev = curr;
635 curr->next = *head;
636 curr->prev = NULL;
637 *head = curr;
638}
639
018e57c7 640static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
0f113f3e 641 int num_of_ciphers,
90d9e49a
DSH		 642 uint32_t disabled_mkey,
643 uint32_t disabled_auth,
644 uint32_t disabled_enc,
645 uint32_t disabled_mac,
0f113f3e
MC		 646 CIPHER_ORDER *co_list,
647 CIPHER_ORDER **head_p,
648 CIPHER_ORDER **tail_p)
649{
650 int i, co_list_num;
651 const SSL_CIPHER *c;
652
653 /*
654 * We have num_of_ciphers descriptions compiled in, depending on the
655 * method selected (SSLv3, TLSv1 etc).
656 * These will later be sorted in a linked list with at most num
657 * entries.
658 */
659
660 /* Get the initial list of ciphers */
661 co_list_num = 0; /* actual count of ciphers */
662 for (i = 0; i < num_of_ciphers; i++) {
663 c = ssl_method->get_cipher(i);
664 /* drop those that use any of that is not available */
ca3895f0
KR		 665 if (c == NULL || !c->valid)
666 continue;
ca3895f0
KR		 667 if ((c->algorithm_mkey & disabled_mkey) ||
668 (c->algorithm_auth & disabled_auth) ||
669 (c->algorithm_enc & disabled_enc) ||
670 (c->algorithm_mac & disabled_mac))
671 continue;
672 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
673 c->min_tls == 0)
674 continue;
675 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
676 c->min_dtls == 0)
677 continue;
678
679 co_list[co_list_num].cipher = c;
680 co_list[co_list_num].next = NULL;
681 co_list[co_list_num].prev = NULL;
682 co_list[co_list_num].active = 0;
683 co_list_num++;
0f113f3e
MC		 684 }
685
686 /*
687 * Prepare linked list from list entries
688 */
689 if (co_list_num > 0) {
690 co_list[0].prev = NULL;
691
692 if (co_list_num > 1) {
693 co_list[0].next = &co_list[1];
694
695 for (i = 1; i < co_list_num - 1; i++) {
696 co_list[i].prev = &co_list[i - 1];
697 co_list[i].next = &co_list[i + 1];
698 }
699
700 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
701 }
702
703 co_list[co_list_num - 1].next = NULL;
704
705 *head_p = &co_list[0];
706 *tail_p = &co_list[co_list_num - 1];
707 }
708}
d02b48c6 709
babb3798 710static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
0f113f3e 711 int num_of_group_aliases,
90d9e49a
DSH		 712 uint32_t disabled_mkey,
713 uint32_t disabled_auth,
714 uint32_t disabled_enc,
715 uint32_t disabled_mac,
0f113f3e
MC		 716 CIPHER_ORDER *head)
717{
718 CIPHER_ORDER *ciph_curr;
719 const SSL_CIPHER **ca_curr;
720 int i;
90d9e49a
DSH		 721 uint32_t mask_mkey = ~disabled_mkey;
722 uint32_t mask_auth = ~disabled_auth;
723 uint32_t mask_enc = ~disabled_enc;
724 uint32_t mask_mac = ~disabled_mac;
0f113f3e
MC		 725
726 /*
727 * First, add the real ciphers as already collected
728 */
729 ciph_curr = head;
730 ca_curr = ca_list;
731 while (ciph_curr != NULL) {
732 *ca_curr = ciph_curr->cipher;
733 ca_curr++;
734 ciph_curr = ciph_curr->next;
735 }
736
737 /*
738 * Now we add the available ones from the cipher_aliases[] table.
739 * They represent either one or more algorithms, some of which
740 * in any affected category must be supported (set in enabled_mask),
741 * or represent a cipher strength value (will be added in any case because algorithms=0).
742 */
743 for (i = 0; i < num_of_group_aliases; i++) {
90d9e49a
DSH		 744 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
745 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
746 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
747 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
0f113f3e
MC		 748
749 if (algorithm_mkey)
750 if ((algorithm_mkey & mask_mkey) == 0)
751 continue;
752
753 if (algorithm_auth)
754 if ((algorithm_auth & mask_auth) == 0)
755 continue;
756
757 if (algorithm_enc)
758 if ((algorithm_enc & mask_enc) == 0)
759 continue;
760
761 if (algorithm_mac)
762 if ((algorithm_mac & mask_mac) == 0)
763 continue;
764
0f113f3e
MC		 765 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
766 ca_curr++;
767 }
768
769 *ca_curr = NULL; /* end of list */
770}
d02b48c6 771
90d9e49a
DSH		 772static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
773 uint32_t alg_auth, uint32_t alg_enc,
3eb2aff4 774 uint32_t alg_mac, int min_tls,
90d9e49a
DSH		 775 uint32_t algo_strength, int rule,
776 int32_t strength_bits, CIPHER_ORDER **head_p,
0f113f3e
MC		 777 CIPHER_ORDER **tail_p)
778{
779 CIPHER_ORDER *head, *tail, *curr, *next, *last;
780 const SSL_CIPHER *cp;
781 int reverse = 0;
018e57c7
DSH		 782
783#ifdef CIPHER_DEBUG
0f113f3e 784 fprintf(stderr,
d1776fde 785 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
3eb2aff4 786 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
0f113f3e 787 algo_strength, strength_bits);
018e57c7 788#endif
d02b48c6 789
a556f342 790 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
a230b26e
EK		 791 reverse = 1; /* needed to maintain sorting between currently
792 * deleted ciphers */
0f113f3e
MC		 793
794 head = *head_p;
795 tail = *tail_p;
796
797 if (reverse) {
798 next = tail;
799 last = head;
800 } else {
801 next = head;
802 last = tail;
803 }
804
805 curr = NULL;
806 for (;;) {
807 if (curr == last)
808 break;
809
810 curr = next;
811
812 if (curr == NULL)
813 break;
814
815 next = reverse ? curr->prev : curr->next;
816
817 cp = curr->cipher;
818
819 /*
820 * Selection criteria is either the value of strength_bits
821 * or the algorithms used.
822 */
823 if (strength_bits >= 0) {
824 if (strength_bits != cp->strength_bits)
825 continue;
826 } else {
018e57c7 827#ifdef CIPHER_DEBUG
0f113f3e 828 fprintf(stderr,
d1776fde 829 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
0f113f3e 830 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
a4a18b2f 831 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
0f113f3e 832 cp->algo_strength);
323fa645 833#endif
0ced42e0
MC		 834 if (cipher_id != 0 && (cipher_id != cp->id))
835 continue;
0f113f3e
MC		 836 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
837 continue;
838 if (alg_auth && !(alg_auth & cp->algorithm_auth))
839 continue;
840 if (alg_enc && !(alg_enc & cp->algorithm_enc))
841 continue;
842 if (alg_mac && !(alg_mac & cp->algorithm_mac))
843 continue;
3eb2aff4 844 if (min_tls && (min_tls != cp->min_tls))
0f113f3e 845 continue;
88a9614b
KR		 846 if ((algo_strength & SSL_STRONG_MASK)
847 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
0f113f3e 848 continue;
c84f7f4a
MC		 849 if ((algo_strength & SSL_DEFAULT_MASK)
850 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
851 continue;
0f113f3e 852 }
018e57c7
DSH		 853
854#ifdef CIPHER_DEBUG
0f113f3e 855 fprintf(stderr, "Action = %d\n", rule);
018e57c7
DSH		 856#endif
857
0f113f3e
MC		 858 /* add the cipher if it has not been added yet. */
859 if (rule == CIPHER_ADD) {
860 /* reverse == 0 */
861 if (!curr->active) {
862 ll_append_tail(&head, curr, &tail);
863 curr->active = 1;
864 }
865 }
866 /* Move the added cipher to this location */
867 else if (rule == CIPHER_ORD) {
868 /* reverse == 0 */
869 if (curr->active) {
870 ll_append_tail(&head, curr, &tail);
871 }
872 } else if (rule == CIPHER_DEL) {
873 /* reverse == 1 */
874 if (curr->active) {
875 /*
876 * most recently deleted ciphersuites get best positions for
877 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
878 * in reverse to maintain the order)
879 */
880 ll_append_head(&head, curr, &tail);
881 curr->active = 0;
882 }
a556f342
EK		 883 } else if (rule == CIPHER_BUMP) {
884 if (curr->active)
885 ll_append_head(&head, curr, &tail);
0f113f3e
MC		 886 } else if (rule == CIPHER_KILL) {
887 /* reverse == 0 */
888 if (head == curr)
889 head = curr->next;
890 else
891 curr->prev->next = curr->next;
892 if (tail == curr)
893 tail = curr->prev;
894 curr->active = 0;
895 if (curr->next != NULL)
896 curr->next->prev = curr->prev;
897 if (curr->prev != NULL)
898 curr->prev->next = curr->next;
899 curr->next = NULL;
900 curr->prev = NULL;
901 }
902 }
903
904 *head_p = head;
905 *tail_p = tail;
906}
018e57c7 907
a717831d 908static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
0f113f3e
MC		 909 CIPHER_ORDER **tail_p)
910{
90d9e49a
DSH		 911 int32_t max_strength_bits;
912 int i, *number_uses;
0f113f3e
MC		 913 CIPHER_ORDER *curr;
914
915 /*
916 * This routine sorts the ciphers with descending strength. The sorting
917 * must keep the pre-sorted sequence, so we apply the normal sorting
918 * routine as '+' movement to the end of the list.
919 */
920 max_strength_bits = 0;
921 curr = *head_p;
922 while (curr != NULL) {
923 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
924 max_strength_bits = curr->cipher->strength_bits;
925 curr = curr->next;
926 }
927
b51bce94 928 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
a71edf3b 929 if (number_uses == NULL) {
0f113f3e 930 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
bbb4ceb8 931 return 0;
0f113f3e 932 }
0f113f3e
MC		 933
934 /*
935 * Now find the strength_bits values actually used
936 */
937 curr = *head_p;
938 while (curr != NULL) {
939 if (curr->active)
940 number_uses[curr->cipher->strength_bits]++;
941 curr = curr->next;
942 }
943 /*
944 * Go through the list of used strength_bits values in descending
945 * order.
946 */
947 for (i = max_strength_bits; i >= 0; i--)
948 if (number_uses[i] > 0)
949 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
950 tail_p);
951
952 OPENSSL_free(number_uses);
bbb4ceb8 953 return 1;
0f113f3e 954}
018e57c7
DSH		 955
956static int ssl_cipher_process_rulestr(const char *rule_str,
0f113f3e
MC		 957 CIPHER_ORDER **head_p,
958 CIPHER_ORDER **tail_p,
959 const SSL_CIPHER **ca_list, CERT *c)
960{
3eb2aff4
KR		 961 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
962 int min_tls;
0f113f3e
MC		 963 const char *l, *buf;
964 int j, multi, found, rule, retval, ok, buflen;
90d9e49a 965 uint32_t cipher_id = 0;
0f113f3e
MC		 966 char ch;
967
968 retval = 1;
969 l = rule_str;
bbb4ceb8 970 for ( ; ; ) {
0f113f3e
MC		 971 ch = *l;
972
973 if (ch == '\0')
974 break; /* done */
975 if (ch == '-') {
976 rule = CIPHER_DEL;
977 l++;
978 } else if (ch == '+') {
979 rule = CIPHER_ORD;
980 l++;
981 } else if (ch == '!') {
982 rule = CIPHER_KILL;
983 l++;
984 } else if (ch == '@') {
985 rule = CIPHER_SPECIAL;
986 l++;
987 } else {
988 rule = CIPHER_ADD;
989 }
990
991 if (ITEM_SEP(ch)) {
992 l++;
993 continue;
994 }
995
996 alg_mkey = 0;
997 alg_auth = 0;
998 alg_enc = 0;
999 alg_mac = 0;
3eb2aff4 1000 min_tls = 0;
0f113f3e
MC		 1001 algo_strength = 0;
1002
1003 for (;;) {
1004 ch = *l;
1005 buf = l;
1006 buflen = 0;
ca570cfd 1007#ifndef CHARSET_EBCDIC
0f113f3e
MC		 1008 while (((ch >= 'A') && (ch <= 'Z')) ||
1009 ((ch >= '0') && (ch <= '9')) ||
1010 ((ch >= 'a') && (ch <= 'z')) ||
1011 (ch == '-') || (ch == '.') || (ch == '='))
ca570cfd 1012#else
00dfbaad
P		 1013 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.')
1014 || (ch == '='))
ca570cfd 1015#endif
0f113f3e
MC		 1016 {
1017 ch = *(++l);
1018 buflen++;
1019 }
1020
1021 if (buflen == 0) {
1022 /*
1023 * We hit something we cannot deal with,
1024 * it is no command or separator nor
1025 * alphanumeric, so we call this an error.
1026 */
a230b26e 1027 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
0f113f3e
MC		 1028 retval = found = 0;
1029 l++;
1030 break;
1031 }
1032
1033 if (rule == CIPHER_SPECIAL) {
1034 found = 0; /* unused -- avoid compiler warning */
1035 break; /* special treatment */
1036 }
1037
1038 /* check for multi-part specification */
1039 if (ch == '+') {
1040 multi = 1;
1041 l++;
bbb4ceb8 1042 } else {
0f113f3e 1043 multi = 0;
bbb4ceb8 1044 }
0f113f3e
MC		 1045
1046 /*
1047 * Now search for the cipher alias in the ca_list. Be careful
1048 * with the strncmp, because the "buflen" limitation
1049 * will make the rule "ADH:SOME" and the cipher
1050 * "ADH-MY-CIPHER" look like a match for buflen=3.
1051 * So additionally check whether the cipher name found
1052 * has the correct length. We can save a strlen() call:
1053 * just checking for the '\0' at the right place is
1054 * sufficient, we have to strncmp() anyway. (We cannot
1055 * use strcmp(), because buf is not '\0' terminated.)
1056 */
1057 j = found = 0;
1058 cipher_id = 0;
1059 while (ca_list[j]) {
86885c28
RS		 1060 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1061 && (ca_list[j]->name[buflen] == '\0')) {
0f113f3e
MC		 1062 found = 1;
1063 break;
1064 } else
1065 j++;
1066 }
1067
1068 if (!found)
1069 break; /* ignore this entry */
1070
1071 if (ca_list[j]->algorithm_mkey) {
1072 if (alg_mkey) {
1073 alg_mkey &= ca_list[j]->algorithm_mkey;
1074 if (!alg_mkey) {
1075 found = 0;
1076 break;
1077 }
bbb4ceb8 1078 } else {
0f113f3e 1079 alg_mkey = ca_list[j]->algorithm_mkey;
bbb4ceb8 1080 }
0f113f3e
MC		 1081 }
1082
1083 if (ca_list[j]->algorithm_auth) {
1084 if (alg_auth) {
1085 alg_auth &= ca_list[j]->algorithm_auth;
1086 if (!alg_auth) {
1087 found = 0;
1088 break;
1089 }
bbb4ceb8 1090 } else {
0f113f3e 1091 alg_auth = ca_list[j]->algorithm_auth;
bbb4ceb8 1092 }
0f113f3e
MC		 1093 }
1094
1095 if (ca_list[j]->algorithm_enc) {
1096 if (alg_enc) {
1097 alg_enc &= ca_list[j]->algorithm_enc;
1098 if (!alg_enc) {
1099 found = 0;
1100 break;
1101 }
bbb4ceb8 1102 } else {
0f113f3e 1103 alg_enc = ca_list[j]->algorithm_enc;
bbb4ceb8 1104 }
0f113f3e
MC		 1105 }
1106
1107 if (ca_list[j]->algorithm_mac) {
1108 if (alg_mac) {
1109 alg_mac &= ca_list[j]->algorithm_mac;
1110 if (!alg_mac) {
1111 found = 0;
1112 break;
1113 }
bbb4ceb8 1114 } else {
0f113f3e 1115 alg_mac = ca_list[j]->algorithm_mac;
bbb4ceb8 1116 }
0f113f3e
MC		 1117 }
1118
88a9614b
KR		 1119 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1120 if (algo_strength & SSL_STRONG_MASK) {
1121 algo_strength &=
1122 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1123 ~SSL_STRONG_MASK;
1124 if (!(algo_strength & SSL_STRONG_MASK)) {
0f113f3e
MC		 1125 found = 0;
1126 break;
1127 }
bbb4ceb8 1128 } else {
88a9614b 1129 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
bbb4ceb8 1130 }
0f113f3e
MC		 1131 }
1132
c84f7f4a
MC		 1133 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1134 if (algo_strength & SSL_DEFAULT_MASK) {
1135 algo_strength &=
1136 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1137 ~SSL_DEFAULT_MASK;
1138 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1139 found = 0;
1140 break;
1141 }
bbb4ceb8 1142 } else {
c84f7f4a
MC		 1143 algo_strength |=
1144 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
bbb4ceb8 1145 }
c84f7f4a
MC		 1146 }
1147
0f113f3e
MC		 1148 if (ca_list[j]->valid) {
1149 /*
1150 * explicit ciphersuite found; its protocol version does not
1151 * become part of the search pattern!
1152 */
1153
1154 cipher_id = ca_list[j]->id;
1155 } else {
1156 /*
1157 * not an explicit ciphersuite; only in this case, the
1158 * protocol version is considered part of the search pattern
1159 */
1160
3eb2aff4
KR		 1161 if (ca_list[j]->min_tls) {
1162 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1163 found = 0;
1164 break;
1165 } else {
1166 min_tls = ca_list[j]->min_tls;
1167 }
0f113f3e
MC		 1168 }
1169 }
1170
1171 if (!multi)
1172 break;
1173 }
1174
1175 /*
1176 * Ok, we have the rule, now apply it
1177 */
1178 if (rule == CIPHER_SPECIAL) { /* special command */
1179 ok = 0;
bbb4ceb8 1180 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0) {
0f113f3e 1181 ok = ssl_cipher_strength_sort(head_p, tail_p);
bbb4ceb8 1182 } else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
0f113f3e
MC		 1183 int level = buf[9] - '0';
1184 if (level < 0 || level > 5) {
1185 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1186 SSL_R_INVALID_COMMAND);
1187 } else {
1188 c->sec_level = level;
1189 ok = 1;
1190 }
bbb4ceb8 1191 } else {
a230b26e 1192 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
bbb4ceb8 1193 }
0f113f3e
MC		 1194 if (ok == 0)
1195 retval = 0;
1196 /*
1197 * We do not support any "multi" options
1198 * together with "@", so throw away the
1199 * rest of the command, if any left, until
1200 * end or ':' is found.
1201 */
1202 while ((*l != '\0') && !ITEM_SEP(*l))
1203 l++;
1204 } else if (found) {
1205 ssl_cipher_apply_rule(cipher_id,
1206 alg_mkey, alg_auth, alg_enc, alg_mac,
3eb2aff4 1207 min_tls, algo_strength, rule, -1, head_p,
0f113f3e
MC		 1208 tail_p);
1209 } else {
1210 while ((*l != '\0') && !ITEM_SEP(*l))
1211 l++;
1212 }
1213 if (*l == '\0')
1214 break; /* done */
1215 }
1216
bbb4ceb8 1217 return retval;
0f113f3e
MC		 1218}
1219
14536c8c 1220#ifndef OPENSSL_NO_EC
2ea80354 1221static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
0f113f3e
MC		 1222 const char **prule_str)
1223{
1224 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
13e228d6 1225 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
0f113f3e 1226 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
13e228d6 1227 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
0f113f3e
MC		 1228 suiteb_comb2 = 1;
1229 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
13e228d6
DSH		 1230 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1231 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1232 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
0f113f3e 1233 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
13e228d6 1234 }
0f113f3e
MC		 1235
1236 if (suiteb_flags) {
1237 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1238 c->cert_flags |= suiteb_flags;
bbb4ceb8 1239 } else {
0f113f3e 1240 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
bbb4ceb8 1241 }
0f113f3e
MC		 1242
1243 if (!suiteb_flags)
1244 return 1;
1245 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1246
1247 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
4fa52141
VD		 1248 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1249 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
0f113f3e
MC		 1250 return 0;
1251 }
10bf4fc2 1252# ifndef OPENSSL_NO_EC
0f113f3e
MC		 1253 switch (suiteb_flags) {
1254 case SSL_CERT_FLAG_SUITEB_128_LOS:
1255 if (suiteb_comb2)
1256 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1257 else
1258 *prule_str =
1259 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1260 break;
1261 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1262 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1263 break;
1264 case SSL_CERT_FLAG_SUITEB_192_LOS:
1265 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1266 break;
1267 }
0f113f3e
MC		 1268 return 1;
1269# else
a230b26e 1270 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
0f113f3e
MC		 1271 return 0;
1272# endif
1273}
14536c8c 1274#endif
2ea80354 1275
0f113f3e
MC		 1276STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1277 **cipher_list, STACK_OF(SSL_CIPHER)
1278 **cipher_list_by_id,
1279 const char *rule_str, CERT *c)
1280{
1281 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
6063453c 1282 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
0f113f3e
MC		 1283 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1284 const char *rule_p;
1285 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1286 const SSL_CIPHER **ca_list = NULL;
1287
1288 /*
1289 * Return with error if nothing to do.
1290 */
1291 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1292 return NULL;
14536c8c 1293#ifndef OPENSSL_NO_EC
0f113f3e
MC		 1294 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1295 return NULL;
14536c8c 1296#endif
2ea80354 1297
0f113f3e
MC		 1298 /*
1299 * To reduce the work to do we only want to process the compiled
1300 * in algorithms, so we first get the mask of disabled ciphers.
1301 */
633d49c7
DSH		 1302
1303 disabled_mkey = disabled_mkey_mask;
1304 disabled_auth = disabled_auth_mask;
1305 disabled_enc = disabled_enc_mask;
1306 disabled_mac = disabled_mac_mask;
0f113f3e
MC		 1307
1308 /*
1309 * Now we have to collect the available ciphers from the compiled
1310 * in ciphers. We cannot get more than the number compiled in, so
1311 * it is used for allocation.
1312 */
1313 num_of_ciphers = ssl_method->num_ciphers();
55a9a16f 1314
b4faea50 1315 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
0f113f3e
MC		 1316 if (co_list == NULL) {
1317 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
bbb4ceb8 1318 return NULL; /* Failure */
0f113f3e
MC		 1319 }
1320
1321 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1322 disabled_mkey, disabled_auth, disabled_enc,
a230b26e 1323 disabled_mac, co_list, &head, &tail);
0f113f3e 1324
a556f342 1325 /* Now arrange all ciphers by preference. */
0f113f3e
MC		 1326
1327 /*
1328 * Everything else being equal, prefer ephemeral ECDH over other key
a556f342
EK		 1329 * exchange mechanisms.
1330 * For consistency, prefer ECDSA over RSA (though this only matters if the
1331 * server has both certificates, and is using the DEFAULT, or a client
1332 * preference).
0f113f3e 1333 */
a556f342
EK		 1334 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1335 -1, &head, &tail);
0f113f3e
MC		 1336 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1337 &tail);
1338 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1339 &tail);
1340
a556f342
EK		 1341 /* Within each strength group, we prefer GCM over CHACHA... */
1342 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1343 &head, &tail);
1344 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1345 &head, &tail);
1346
a230b26e
EK		 1347 /*
1348 * ...and generally, our preferred cipher is AES.
1349 * Note that AEADs will be bumped to take preference after sorting by
1350 * strength.
1351 */
a556f342
EK		 1352 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1353 -1, &head, &tail);
0f113f3e
MC		 1354
1355 /* Temporarily enable everything else for sorting */
1356 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1357
1358 /* Low priority for MD5 */
1359 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1360 &tail);
1361
1362 /*
1363 * Move anonymous ciphers to the end. Usually, these will remain
1364 * disabled. (For applications that allow them, they aren't too bad, but
1365 * we prefer authenticated ciphers.)
1366 */
1367 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1368 &tail);
1369
0f113f3e
MC		 1370 /*
1371 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
1372 * &head, &tail);
1373 */
1374 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1375 &tail);
1376 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1377 &tail);
0f113f3e 1378
3519bae5 1379 /* RC4 is sort-of broken -- move to the end */
0f113f3e
MC		 1380 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1381 &tail);
1382
1383 /*
1384 * Now sort by symmetric encryption strength. The above ordering remains
1385 * in force within each class
1386 */
1387 if (!ssl_cipher_strength_sort(&head, &tail)) {
1388 OPENSSL_free(co_list);
1389 return NULL;
1390 }
1391
a556f342
EK		 1392 /*
1393 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1394 * TODO(openssl-team): is there an easier way to accomplish all this?
1395 */
3eb2aff4 1396 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
a556f342
EK		 1397 &head, &tail);
1398
1399 /*
1400 * Irrespective of strength, enforce the following order:
1401 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1402 * Within each group, ciphers remain sorted by strength and previous
1403 * preference, i.e.,
1404 * 1) ECDHE > DHE
1405 * 2) GCM > CHACHA
1406 * 3) AES > rest
1407 * 4) TLS 1.2 > legacy
1408 *
1409 * Because we now bump ciphers to the top of the list, we proceed in
1410 * reverse order of preference.
1411 */
1412 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1413 &head, &tail);
1414 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
a230b26e 1415 CIPHER_BUMP, -1, &head, &tail);
a556f342 1416 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
a230b26e 1417 CIPHER_BUMP, -1, &head, &tail);
a556f342 1418
0f113f3e
MC		 1419 /* Now disable everything (maintaining the ordering!) */
1420 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1421
1422 /*
1423 * We also need cipher aliases for selecting based on the rule_str.
1424 * There might be two types of entries in the rule_str: 1) names
1425 * of ciphers themselves 2) aliases for groups of ciphers.
1426 * For 1) we need the available ciphers and for 2) the cipher
1427 * groups of cipher_aliases added together in one list (otherwise
1428 * we would be happy with just the cipher_aliases table).
1429 */
b6eb9827 1430 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
0f113f3e 1431 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
b4faea50 1432 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
0f113f3e
MC		 1433 if (ca_list == NULL) {
1434 OPENSSL_free(co_list);
1435 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
bbb4ceb8 1436 return NULL; /* Failure */
0f113f3e
MC		 1437 }
1438 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1439 disabled_mkey, disabled_auth, disabled_enc,
6063453c 1440 disabled_mac, head);
0f113f3e
MC		 1441
1442 /*
1443 * If the rule_string begins with DEFAULT, apply the default rule
1444 * before using the (possibly available) additional rules.
1445 */
1446 ok = 1;
1447 rule_p = rule_str;
1448 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1449 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1450 &head, &tail, ca_list, c);
1451 rule_p += 7;
1452 if (*rule_p == ':')
1453 rule_p++;
1454 }
1455
1456 if (ok && (strlen(rule_p) > 0))
1457 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1458
a230b26e 1459 OPENSSL_free(ca_list); /* Not needed anymore */
0f113f3e
MC		 1460
1461 if (!ok) { /* Rule processing failure */
1462 OPENSSL_free(co_list);
bbb4ceb8 1463 return NULL;
0f113f3e
MC		 1464 }
1465
1466 /*
1467 * Allocate new "cipherstack" for the result, return with error
1468 * if we cannot get one.
1469 */
1470 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1471 OPENSSL_free(co_list);
bbb4ceb8 1472 return NULL;
0f113f3e
MC		 1473 }
1474
1475 /*
1476 * The cipher selection for the list is done. The ciphers are added
1477 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1478 */
1479 for (curr = head; curr != NULL; curr = curr->next) {
b53338cb 1480 if (curr->active) {
0f113f3e
MC		 1481 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1482 OPENSSL_free(co_list);
1483 sk_SSL_CIPHER_free(cipherstack);
1484 return NULL;
1485 }
d02b48c6 1486#ifdef CIPHER_DEBUG
0f113f3e 1487 fprintf(stderr, "<%s>\n", curr->cipher->name);
d02b48c6 1488#endif
0f113f3e
MC		 1489 }
1490 }
1491 OPENSSL_free(co_list); /* Not needed any longer */
1492
1493 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1494 if (tmp_cipher_list == NULL) {
1495 sk_SSL_CIPHER_free(cipherstack);
1496 return NULL;
1497 }
25aaa98a 1498 sk_SSL_CIPHER_free(*cipher_list);
0f113f3e
MC		 1499 *cipher_list = cipherstack;
1500 if (*cipher_list_by_id != NULL)
1501 sk_SSL_CIPHER_free(*cipher_list_by_id);
1502 *cipher_list_by_id = tmp_cipher_list;
a230b26e 1503 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
0f113f3e
MC		 1504
1505 sk_SSL_CIPHER_sort(*cipher_list_by_id);
bbb4ceb8 1506 return cipherstack;
0f113f3e 1507}
d02b48c6 1508
7689ed34 1509char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
0f113f3e 1510{
361a1191 1511 const char *ver;
0f113f3e 1512 const char *kx, *au, *enc, *mac;
baf245ec 1513 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
a230b26e 1514 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
0f113f3e 1515
baf245ec
RS		 1516 if (buf == NULL) {
1517 len = 128;
1518 buf = OPENSSL_malloc(len);
1519 if (buf == NULL)
1520 return NULL;
bbb4ceb8 1521 } else if (len < 128) {
baf245ec 1522 return NULL;
bbb4ceb8 1523 }
baf245ec 1524
0f113f3e
MC		 1525 alg_mkey = cipher->algorithm_mkey;
1526 alg_auth = cipher->algorithm_auth;
1527 alg_enc = cipher->algorithm_enc;
1528 alg_mac = cipher->algorithm_mac;
0f113f3e 1529
3eb2aff4 1530 ver = ssl_protocol_to_string(cipher->min_tls);
0f113f3e
MC		 1531
1532 switch (alg_mkey) {
1533 case SSL_kRSA:
361a1191 1534 kx = "RSA";
0f113f3e 1535 break;
0f113f3e 1536 case SSL_kDHE:
361a1191 1537 kx = "DH";
0f113f3e 1538 break;
0f113f3e
MC		 1539 case SSL_kECDHE:
1540 kx = "ECDH";
1541 break;
1542 case SSL_kPSK:
1543 kx = "PSK";
1544 break;
8baac6a2
DSH		 1545 case SSL_kRSAPSK:
1546 kx = "RSAPSK";
1547 break;
1548 case SSL_kECDHEPSK:
1549 kx = "ECDHEPSK";
1550 break;
1551 case SSL_kDHEPSK:
1552 kx = "DHEPSK";
1553 break;
0f113f3e
MC		 1554 case SSL_kSRP:
1555 kx = "SRP";
1556 break;
1557 case SSL_kGOST:
1558 kx = "GOST";
1559 break;
e5c4bf93
DSH		 1560 case SSL_kANY:
1561 kx = "any";
1562 break;
0f113f3e
MC		 1563 default:
1564 kx = "unknown";
1565 }
1566
1567 switch (alg_auth) {
1568 case SSL_aRSA:
1569 au = "RSA";
1570 break;
1571 case SSL_aDSS:
1572 au = "DSS";
1573 break;
0f113f3e
MC		 1574 case SSL_aNULL:
1575 au = "None";
1576 break;
1577 case SSL_aECDSA:
1578 au = "ECDSA";
1579 break;
1580 case SSL_aPSK:
1581 au = "PSK";
1582 break;
1583 case SSL_aSRP:
1584 au = "SRP";
1585 break;
0f113f3e
MC		 1586 case SSL_aGOST01:
1587 au = "GOST01";
1588 break;
48722ff5 1589 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
e44380a9
DB		 1590 case (SSL_aGOST12 | SSL_aGOST01):
1591 au = "GOST12";
1592 break;
e5c4bf93
DSH		 1593 case SSL_aANY:
1594 au = "any";
1595 break;
0f113f3e
MC		 1596 default:
1597 au = "unknown";
1598 break;
1599 }
1600
1601 switch (alg_enc) {
1602 case SSL_DES:
361a1191 1603 enc = "DES(56)";
0f113f3e
MC		 1604 break;
1605 case SSL_3DES:
1606 enc = "3DES(168)";
1607 break;
1608 case SSL_RC4:
361a1191 1609 enc = "RC4(128)";
0f113f3e
MC		 1610 break;
1611 case SSL_RC2:
361a1191 1612 enc = "RC2(128)";
0f113f3e
MC		 1613 break;
1614 case SSL_IDEA:
1615 enc = "IDEA(128)";
1616 break;
1617 case SSL_eNULL:
1618 enc = "None";
1619 break;
1620 case SSL_AES128:
1621 enc = "AES(128)";
1622 break;
1623 case SSL_AES256:
1624 enc = "AES(256)";
1625 break;
1626 case SSL_AES128GCM:
1627 enc = "AESGCM(128)";
1628 break;
1629 case SSL_AES256GCM:
1630 enc = "AESGCM(256)";
1631 break;
e75c5a79
DSH		 1632 case SSL_AES128CCM:
1633 enc = "AESCCM(128)";
1634 break;
1635 case SSL_AES256CCM:
1636 enc = "AESCCM(256)";
1637 break;
3d3701ea
DSH		 1638 case SSL_AES128CCM8:
1639 enc = "AESCCM8(128)";
1640 break;
1641 case SSL_AES256CCM8:
1642 enc = "AESCCM8(256)";
1643 break;
0f113f3e
MC		 1644 case SSL_CAMELLIA128:
1645 enc = "Camellia(128)";
1646 break;
1647 case SSL_CAMELLIA256:
1648 enc = "Camellia(256)";
1649 break;
bc326738
JS		 1650 case SSL_ARIA128GCM:
1651 enc = "ARIAGCM(128)";
1652 break;
1653 case SSL_ARIA256GCM:
1654 enc = "ARIAGCM(256)";
1655 break;
0f113f3e
MC		 1656 case SSL_SEED:
1657 enc = "SEED(128)";
1658 break;
1659 case SSL_eGOST2814789CNT:
e44380a9 1660 case SSL_eGOST2814789CNT12:
0f113f3e
MC		 1661 enc = "GOST89(256)";
1662 break;
0d3587c7
MC		 1663 case SSL_CHACHA20POLY1305:
1664 enc = "CHACHA20/POLY1305(256)";
1665 break;
0f113f3e
MC		 1666 default:
1667 enc = "unknown";
1668 break;
1669 }
1670
1671 switch (alg_mac) {
1672 case SSL_MD5:
1673 mac = "MD5";
1674 break;
1675 case SSL_SHA1:
1676 mac = "SHA1";
1677 break;
1678 case SSL_SHA256:
1679 mac = "SHA256";
1680 break;
1681 case SSL_SHA384:
1682 mac = "SHA384";
1683 break;
1684 case SSL_AEAD:
1685 mac = "AEAD";
1686 break;
1687 case SSL_GOST89MAC:
e44380a9 1688 case SSL_GOST89MAC12:
0f113f3e
MC		 1689 mac = "GOST89";
1690 break;
1691 case SSL_GOST94:
1692 mac = "GOST94";
1693 break;
e44380a9
DB		 1694 case SSL_GOST12_256:
1695 case SSL_GOST12_512:
1696 mac = "GOST2012";
1697 break;
0f113f3e
MC		 1698 default:
1699 mac = "unknown";
1700 break;
1701 }
1702
361a1191 1703 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
55a9a16f 1704
bbb4ceb8 1705 return buf;
0f113f3e 1706}
d02b48c6 1707
b11836a6 1708const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
0f113f3e 1709{
0f113f3e 1710 if (c == NULL)
baf245ec 1711 return "(NONE)";
ee3a6c64
VD		 1712
1713 /*
1714 * Backwards-compatibility crutch. In almost all contexts we report TLS
1715 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1716 */
1717 if (c->min_tls == TLS1_VERSION)
1718 return "TLSv1.0";
3eb2aff4 1719 return ssl_protocol_to_string(c->min_tls);
0f113f3e 1720}
d02b48c6
RE		 1721
1722/* return the actual cipher being used */
0821bcd4 1723const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
0f113f3e
MC		 1724{
1725 if (c != NULL)
bbb4ceb8
PY		 1726 return c->name;
1727 return "(NONE)";
1728}
1729
1730/* return the actual cipher being used in RFC standard name */
1731const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
1732{
1733 if (c != NULL)
1734 return c->stdname;
1735 return "(NONE)";
1736}
1737
1738/* return the OpenSSL name based on given RFC standard name */
1739const char *OPENSSL_cipher_name(const char *stdname)
1740{
1741 const SSL_CIPHER *c;
1742
1743 if (stdname == NULL)
1744 return "(NONE)";
1745 c = ssl3_get_cipher_by_std_name(stdname);
1746 return SSL_CIPHER_get_name(c);
0f113f3e 1747}
d02b48c6 1748
657e60fa 1749/* number of bits for symmetric cipher */
1c86d8fd 1750int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
0f113f3e 1751{
1c86d8fd 1752 int ret = 0;
0f113f3e
MC		 1753
1754 if (c != NULL) {
1755 if (alg_bits != NULL)
a230b26e
EK		 1756 *alg_bits = (int)c->alg_bits;
1757 ret = (int)c->strength_bits;
0f113f3e 1758 }
90d9e49a 1759 return ret;
0f113f3e 1760}
d02b48c6 1761
90d9e49a 1762uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
0f113f3e
MC		 1763{
1764 return c->id;
1765}
08557cf2 1766
6b691a5c 1767SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
0f113f3e
MC		 1768{
1769 SSL_COMP *ctmp;
1770 int i, nn;
1771
1772 if ((n == 0) || (sk == NULL))
1773 return (NULL);
1774 nn = sk_SSL_COMP_num(sk);
1775 for (i = 0; i < nn; i++) {
1776 ctmp = sk_SSL_COMP_value(sk, i);
1777 if (ctmp->id == n)
bbb4ceb8 1778 return ctmp;
0f113f3e 1779 }
bbb4ceb8 1780 return NULL;
0f113f3e 1781}
413c4f45 1782
09b6c2ef 1783#ifdef OPENSSL_NO_COMP
9a555706 1784STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
0f113f3e
MC		 1785{
1786 return NULL;
1787}
a230b26e 1788
9a555706
RS		 1789STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1790 *meths)
0f113f3e 1791{
9a555706 1792 return meths;
0f113f3e 1793}
a230b26e 1794
9a555706
RS		 1795int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1796{
1797 return 1;
1798}
1799
09b6c2ef 1800#else
6b691a5c 1801STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
0f113f3e
MC		 1802{
1803 load_builtin_compressions();
bbb4ceb8 1804 return ssl_comp_methods;
0f113f3e
MC		 1805}
1806
1807STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1808 *meths)
1809{
1810 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1811 ssl_comp_methods = meths;
1812 return old_meths;
1813}
cbb67448 1814
db7b5e0d 1815static void cmeth_free(SSL_COMP *cm)
0f113f3e
MC		 1816{
1817 OPENSSL_free(cm);
1818}
db7b5e0d 1819
b3599dbb 1820void ssl_comp_free_compression_methods_int(void)
0f113f3e
MC		 1821{
1822 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1823 ssl_comp_methods = NULL;
1824 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1825}
db7b5e0d 1826
6b691a5c 1827int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
0f113f3e
MC		 1828{
1829 SSL_COMP *comp;
413c4f45 1830
9a555706 1831 if (cm == NULL || COMP_get_type(cm) == NID_undef)
0f113f3e 1832 return 1;
9f495243 1833
50e735f9
MC		 1834 /*-
1835 * According to draft-ietf-tls-compression-04.txt, the
1836 * compression number ranges should be the following:
1837 *
1838 * 0 to 63: methods defined by the IETF
1839 * 64 to 192: external party methods assigned by IANA
1840 * 193 to 255: reserved for private use
1841 */
0f113f3e
MC		 1842 if (id < 193 || id > 255) {
1843 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1844 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
e0670973 1845 return 1;
0f113f3e
MC		 1846 }
1847
bbd86bf5 1848 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
b4faea50 1849 comp = OPENSSL_malloc(sizeof(*comp));
0f113f3e 1850 if (comp == NULL) {
bbd86bf5 1851 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e 1852 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
bbb4ceb8 1853 return 1;
0f113f3e
MC		 1854 }
1855
1856 comp->id = id;
1857 comp->method = cm;
1858 load_builtin_compressions();
1859 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1860 OPENSSL_free(comp);
bbd86bf5 1861 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e
MC		 1862 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1863 SSL_R_DUPLICATE_COMPRESSION_ID);
bbb4ceb8 1864 return 1;
bbd86bf5 1865 }
a230b26e 1866 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
0f113f3e 1867 OPENSSL_free(comp);
bbd86bf5 1868 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
0f113f3e 1869 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
bbb4ceb8 1870 return 1;
0f113f3e 1871 }
bbd86bf5 1872 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
bbb4ceb8 1873 return 0;
0f113f3e 1874}
9a555706 1875#endif
377dcdba
RL		 1876
1877const char *SSL_COMP_get_name(const COMP_METHOD *comp)
0f113f3e 1878{
9a555706
RS		 1879#ifndef OPENSSL_NO_COMP
1880 return comp ? COMP_get_name(comp) : NULL;
1881#else
0f113f3e 1882 return NULL;
09b6c2ef 1883#endif
9a555706
RS		 1884}
1885
e304d3e2
MC		 1886const char *SSL_COMP_get0_name(const SSL_COMP *comp)
1887{
1888#ifndef OPENSSL_NO_COMP
1889 return comp->name;
1890#else
1891 return NULL;
1892#endif
1893}
1894
1895int SSL_COMP_get_id(const SSL_COMP *comp)
1896{
1897#ifndef OPENSSL_NO_COMP
1898 return comp->id;
1899#else
1900 return -1;
1901#endif
1902}
1903
60d685d1
BK		 1904const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr,
1905 int all)
0f113f3e 1906{
1316ca80
TS		 1907 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
1908
60d685d1 1909 if (c == NULL || (!all && c->valid == 0))
0f113f3e
MC		 1910 return NULL;
1911 return c;
1912}
94a209d8
DSH		 1913
1914const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
0f113f3e
MC		 1915{
1916 return ssl->method->get_cipher_by_char(ptr);
1917}
98c9ce2f
DSH		 1918
1919int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1920{
1921 int i;
1922 if (c == NULL)
3ec13237 1923 return NID_undef;
98c9ce2f
DSH		 1924 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
1925 if (i == -1)
3ec13237 1926 return NID_undef;
98c9ce2f
DSH		 1927 return ssl_cipher_table_cipher[i].nid;
1928}
1929
1930int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1931{
1316ca80
TS		 1932 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
1933
98c9ce2f 1934 if (i == -1)
3ec13237 1935 return NID_undef;
98c9ce2f
DSH		 1936 return ssl_cipher_table_mac[i].nid;
1937}
3ec13237
TS		 1938
1939int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
1940{
1941 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
1316ca80 1942
3ec13237
TS		 1943 if (i == -1)
1944 return NID_undef;
1945 return ssl_cipher_table_kx[i].nid;
1946}
1947
1948int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
1949{
1316ca80
TS		 1950 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
1951
3ec13237
TS		 1952 if (i == -1)
1953 return NID_undef;
8eb33e4f 1954 return ssl_cipher_table_auth[i].nid;
3ec13237
TS		 1955}
1956
ba4df682
MC		 1957const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
1958{
72257204 1959 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
ba4df682 1960
ba4df682
MC		 1961 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
1962 return NULL;
1963 return ssl_digest_methods[idx];
1964}
1965
3ec13237
TS		 1966int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
1967{
1968 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
1969}
045bd047
DW		 1970
1971int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
1972 size_t *int_overhead, size_t *blocksize,
1973 size_t *ext_overhead)
1974{
1975 size_t mac = 0, in = 0, blk = 0, out = 0;
1976
1977 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
1978 * because there are no handy #defines for those. */
bc326738 1979 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
045bd047
DW		 1980 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1981 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
1982 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
1983 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
1984 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
1985 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
1986 out = 16;
1987 } else if (c->algorithm_mac & SSL_AEAD) {
1988 /* We're supposed to have handled all the AEAD modes above */
1989 return 0;
1990 } else {
1991 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
1992 int digest_nid = SSL_CIPHER_get_digest_nid(c);
1993 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
1994
1995 if (e_md == NULL)
1996 return 0;
1997
1998 mac = EVP_MD_size(e_md);
1999 if (c->algorithm_enc != SSL_eNULL) {
2000 int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
2001 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
2002
2003 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
2004 known CBC cipher. */
2005 if (e_ciph == NULL ||
2006 EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE)
2007 return 0;
2008
2009 in = 1; /* padding length byte */
2010 out = EVP_CIPHER_iv_length(e_ciph);
2011 blk = EVP_CIPHER_block_size(e_ciph);
2012 }
2013 }
2014
2015 *mac_overhead = mac;
2016 *int_overhead = in;
2017 *blocksize = blk;
2018 *ext_overhead = out;
2019
2020 return 1;
2021}
c04cd728
DSH		 2022
2023int ssl_cert_is_disabled(size_t idx)
2024{
2025 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
2026
2027 if (cl == NULL || (cl->amask & disabled_auth_mask) != 0)
2028 return 1;
2029 return 0;
2030}
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