2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * ECC cipher suite support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
15 /* ====================================================================
16 * Copyright 2005 Nokia. All rights reserved.
18 * The portions of the attached software ("Contribution") is developed by
19 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
22 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
23 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
24 * support (see RFC 4279) to OpenSSL.
26 * No patent licenses or other rights except those expressly stated in
27 * the OpenSSL open source license shall be deemed granted or received
28 * expressly, by implication, estoppel, or otherwise.
30 * No assurances are provided by Nokia that the Contribution does not
31 * infringe the patent or other intellectual property rights of any third
32 * party or that the license provides you with all the necessary rights
33 * to make use of the Contribution.
35 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
36 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
37 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
38 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
44 #include <openssl/objects.h>
45 #include <openssl/comp.h>
46 #include <openssl/engine.h>
47 #include <openssl/crypto.h>
49 #include "internal/thread_once.h"
51 #define SSL_ENC_DES_IDX 0
52 #define SSL_ENC_3DES_IDX 1
53 #define SSL_ENC_RC4_IDX 2
54 #define SSL_ENC_RC2_IDX 3
55 #define SSL_ENC_IDEA_IDX 4
56 #define SSL_ENC_NULL_IDX 5
57 #define SSL_ENC_AES128_IDX 6
58 #define SSL_ENC_AES256_IDX 7
59 #define SSL_ENC_CAMELLIA128_IDX 8
60 #define SSL_ENC_CAMELLIA256_IDX 9
61 #define SSL_ENC_GOST89_IDX 10
62 #define SSL_ENC_SEED_IDX 11
63 #define SSL_ENC_AES128GCM_IDX 12
64 #define SSL_ENC_AES256GCM_IDX 13
65 #define SSL_ENC_AES128CCM_IDX 14
66 #define SSL_ENC_AES256CCM_IDX 15
67 #define SSL_ENC_AES128CCM8_IDX 16
68 #define SSL_ENC_AES256CCM8_IDX 17
69 #define SSL_ENC_GOST8912_IDX 18
70 #define SSL_ENC_CHACHA_IDX 19
71 #define SSL_ENC_NUM_IDX 20
73 /* NB: make sure indices in these tables match values above */
80 /* Table of NIDs for each cipher */
81 static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
82 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
83 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
84 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
85 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
86 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
87 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
88 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
89 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
90 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
91 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
92 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
93 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
94 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
95 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
96 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
97 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
98 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
99 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
100 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX */
101 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305},
104 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
105 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
109 #define SSL_COMP_NULL_IDX 0
110 #define SSL_COMP_ZLIB_IDX 1
111 #define SSL_COMP_NUM_IDX 2
113 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
115 #ifndef OPENSSL_NO_COMP
116 static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
120 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
124 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
126 /* NB: make sure indices in this table matches values above */
127 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
128 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
129 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
130 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
131 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
132 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
133 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
134 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
135 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
136 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
137 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
138 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
139 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
142 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
143 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
147 static const ssl_cipher_table ssl_cipher_table_kx[] = {
148 {SSL_kRSA, NID_kx_rsa},
149 {SSL_kECDHE, NID_kx_ecdhe},
150 {SSL_kDHE, NID_kx_dhe},
151 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
152 {SSL_kDHEPSK, NID_kx_dhe_psk},
153 {SSL_kRSAPSK, NID_kx_rsa_psk},
154 {SSL_kPSK, NID_kx_psk},
155 {SSL_kSRP, NID_kx_srp},
156 {SSL_kGOST, NID_kx_gost}
159 static const ssl_cipher_table ssl_cipher_table_auth[] = {
160 {SSL_aRSA, NID_auth_rsa},
161 {SSL_aECDSA, NID_auth_ecdsa},
162 {SSL_aPSK, NID_auth_psk},
163 {SSL_aDSS, NID_auth_dss},
164 {SSL_aGOST01, NID_auth_gost01},
165 {SSL_aGOST12, NID_auth_gost12},
166 {SSL_aSRP, NID_auth_srp},
167 {SSL_aNULL, NID_auth_null}
171 /* Utility function for table lookup */
172 static int ssl_cipher_info_find(const ssl_cipher_table * table,
173 size_t table_cnt, uint32_t mask)
176 for (i = 0; i < table_cnt; i++, table++) {
177 if (table->mask == mask)
183 #define ssl_cipher_info_lookup(table, x) \
184 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
187 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
188 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
191 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
192 /* MD5, SHA, GOST94, MAC89 */
193 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
194 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
195 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
200 static int ssl_mac_secret_size[SSL_MD_NUM_IDX];
203 #define CIPHER_KILL 2
206 #define CIPHER_SPECIAL 5
208 * Bump the ciphers to the top of the list.
209 * This rule isn't currently supported by the public cipherstring API.
211 #define CIPHER_BUMP 6
213 typedef struct cipher_order_st {
214 const SSL_CIPHER *cipher;
217 struct cipher_order_st *next, *prev;
220 static const SSL_CIPHER cipher_aliases[] = {
221 /* "ALL" doesn't include eNULL (must be specifically enabled) */
222 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL},
223 /* "COMPLEMENTOFALL" */
224 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL},
227 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
230 {0, SSL_TXT_CMPDEF, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
233 * key exchange aliases (some of those using only a single bit here
234 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
235 * combines DHE_DSS and DHE_RSA)
237 {0, SSL_TXT_kRSA, 0, SSL_kRSA},
239 {0, SSL_TXT_kEDH, 0, SSL_kDHE},
240 {0, SSL_TXT_kDHE, 0, SSL_kDHE},
241 {0, SSL_TXT_DH, 0, SSL_kDHE},
243 {0, SSL_TXT_kEECDH, 0, SSL_kECDHE},
244 {0, SSL_TXT_kECDHE, 0, SSL_kECDHE},
245 {0, SSL_TXT_ECDH, 0, SSL_kECDHE},
247 {0, SSL_TXT_kPSK, 0, SSL_kPSK},
248 {0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK},
249 {0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK},
250 {0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK},
251 {0, SSL_TXT_kSRP, 0, SSL_kSRP},
252 {0, SSL_TXT_kGOST, 0, SSL_kGOST},
254 /* server authentication aliases */
255 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA},
256 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS},
257 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS},
258 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL},
259 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA},
260 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA},
261 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK},
262 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01},
263 {0, SSL_TXT_aGOST12, 0, 0, SSL_aGOST12},
264 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01 | SSL_aGOST12},
265 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP},
267 /* aliases combining key exchange and server authentication */
268 {0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL},
269 {0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL},
270 {0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL},
271 {0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL},
272 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL},
273 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA},
274 {0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL},
275 {0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL},
276 {0, SSL_TXT_PSK, 0, SSL_PSK},
277 {0, SSL_TXT_SRP, 0, SSL_kSRP},
279 /* symmetric encryption aliases */
280 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES},
281 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4},
282 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2},
283 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA},
284 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED},
285 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL},
286 {0, SSL_TXT_GOST, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12},
287 {0, SSL_TXT_AES128, 0, 0, 0,
288 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
289 {0, SSL_TXT_AES256, 0, 0, 0,
290 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
291 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES},
292 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
293 {0, SSL_TXT_AES_CCM, 0, 0, 0,
294 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
295 {0, SSL_TXT_AES_CCM_8, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
296 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128},
297 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256},
298 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA},
299 {0, SSL_TXT_CHACHA20, 0, 0, 0, SSL_CHACHA20},
302 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5},
303 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1},
304 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1},
305 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94},
306 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
307 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256},
308 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384},
309 {0, SSL_TXT_GOST12, 0, 0, 0, 0, SSL_GOST12_256},
311 /* protocol version aliases */
312 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL3_VERSION},
313 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, TLS1_VERSION},
314 {0, "TLSv1.0", 0, 0, 0, 0, 0, TLS1_VERSION},
315 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, TLS1_2_VERSION},
317 /* strength classes */
318 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
319 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
320 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
321 /* FIPS 140-2 approved ciphersuite */
322 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
324 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
325 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, 0,
326 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
327 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, 0,
328 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
333 * Search for public key algorithm with given name and return its pkey_id if
334 * it is available. Otherwise return 0
336 #ifdef OPENSSL_NO_ENGINE
338 static int get_optional_pkey_id(const char *pkey_name)
340 const EVP_PKEY_ASN1_METHOD *ameth;
342 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
343 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
352 static int get_optional_pkey_id(const char *pkey_name)
354 const EVP_PKEY_ASN1_METHOD *ameth;
355 ENGINE *tmpeng = NULL;
357 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
359 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
363 ENGINE_finish(tmpeng);
369 /* masks of disabled algorithms */
370 static uint32_t disabled_enc_mask;
371 static uint32_t disabled_mac_mask;
372 static uint32_t disabled_mkey_mask;
373 static uint32_t disabled_auth_mask;
375 void ssl_load_ciphers(void)
378 const ssl_cipher_table *t;
380 disabled_enc_mask = 0;
381 ssl_sort_cipher_list();
382 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
383 if (t->nid == NID_undef) {
384 ssl_cipher_methods[i] = NULL;
386 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
387 ssl_cipher_methods[i] = cipher;
389 disabled_enc_mask |= t->mask;
392 #ifdef SSL_FORBID_ENULL
393 disabled_enc_mask |= SSL_eNULL;
395 disabled_mac_mask = 0;
396 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
397 const EVP_MD *md = EVP_get_digestbynid(t->nid);
398 ssl_digest_methods[i] = md;
400 disabled_mac_mask |= t->mask;
402 ssl_mac_secret_size[i] = EVP_MD_size(md);
403 OPENSSL_assert(ssl_mac_secret_size[i] >= 0);
406 /* Make sure we can access MD5 and SHA1 */
407 OPENSSL_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL);
408 OPENSSL_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL);
410 disabled_mkey_mask = 0;
411 disabled_auth_mask = 0;
413 #ifdef OPENSSL_NO_RSA
414 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
415 disabled_auth_mask |= SSL_aRSA;
417 #ifdef OPENSSL_NO_DSA
418 disabled_auth_mask |= SSL_aDSS;
421 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
424 disabled_mkey_mask |= SSL_kECDHEPSK;
425 disabled_auth_mask |= SSL_aECDSA;
427 #ifdef OPENSSL_NO_PSK
428 disabled_mkey_mask |= SSL_PSK;
429 disabled_auth_mask |= SSL_aPSK;
431 #ifdef OPENSSL_NO_SRP
432 disabled_mkey_mask |= SSL_kSRP;
436 * Check for presence of GOST 34.10 algorithms, and if they are not
437 * present, disable appropriate auth and key exchange
439 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
440 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
441 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
443 disabled_mac_mask |= SSL_GOST89MAC;
446 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
447 get_optional_pkey_id("gost-mac-12");
448 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) {
449 ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
451 disabled_mac_mask |= SSL_GOST89MAC12;
454 if (!get_optional_pkey_id("gost2001"))
455 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
456 if (!get_optional_pkey_id("gost2012_256"))
457 disabled_auth_mask |= SSL_aGOST12;
458 if (!get_optional_pkey_id("gost2012_512"))
459 disabled_auth_mask |= SSL_aGOST12;
461 * Disable GOST key exchange if no GOST signature algs are available *
463 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
464 (SSL_aGOST01 | SSL_aGOST12))
465 disabled_mkey_mask |= SSL_kGOST;
468 #ifndef OPENSSL_NO_COMP
470 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
472 return ((*a)->id - (*b)->id);
475 DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
477 SSL_COMP *comp = NULL;
478 COMP_METHOD *method = COMP_zlib();
480 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
481 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
483 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
484 comp = OPENSSL_malloc(sizeof(*comp));
486 comp->method = method;
487 comp->id = SSL_COMP_ZLIB_IDX;
488 comp->name = COMP_get_name(method);
489 sk_SSL_COMP_push(ssl_comp_methods, comp);
490 sk_SSL_COMP_sort(ssl_comp_methods);
493 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
497 static int load_builtin_compressions(void)
499 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
503 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
504 const EVP_MD **md, int *mac_pkey_type,
505 int *mac_secret_size, SSL_COMP **comp, int use_etm)
515 #ifndef OPENSSL_NO_COMP
516 if (!load_builtin_compressions()) {
518 * Currently don't care, since a failure only means that
519 * ssl_comp_methods is NULL, which is perfectly OK
524 ctmp.id = s->compress_meth;
525 if (ssl_comp_methods != NULL) {
526 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
528 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
532 /* If were only interested in comp then return success */
533 if ((enc == NULL) && (md == NULL))
537 if ((enc == NULL) || (md == NULL))
540 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
545 if (i == SSL_ENC_NULL_IDX)
546 *enc = EVP_enc_null();
548 *enc = ssl_cipher_methods[i];
551 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
554 if (mac_pkey_type != NULL)
555 *mac_pkey_type = NID_undef;
556 if (mac_secret_size != NULL)
557 *mac_secret_size = 0;
558 if (c->algorithm_mac == SSL_AEAD)
559 mac_pkey_type = NULL;
561 *md = ssl_digest_methods[i];
562 if (mac_pkey_type != NULL)
563 *mac_pkey_type = ssl_mac_pkey_id[i];
564 if (mac_secret_size != NULL)
565 *mac_secret_size = ssl_mac_secret_size[i];
568 if ((*enc != NULL) &&
569 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
570 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
571 const EVP_CIPHER *evp;
576 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
577 s->ssl_version < TLS1_VERSION)
583 if (c->algorithm_enc == SSL_RC4 &&
584 c->algorithm_mac == SSL_MD5 &&
585 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
586 *enc = evp, *md = NULL;
587 else if (c->algorithm_enc == SSL_AES128 &&
588 c->algorithm_mac == SSL_SHA1 &&
589 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
590 *enc = evp, *md = NULL;
591 else if (c->algorithm_enc == SSL_AES256 &&
592 c->algorithm_mac == SSL_SHA1 &&
593 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
594 *enc = evp, *md = NULL;
595 else if (c->algorithm_enc == SSL_AES128 &&
596 c->algorithm_mac == SSL_SHA256 &&
597 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
598 *enc = evp, *md = NULL;
599 else if (c->algorithm_enc == SSL_AES256 &&
600 c->algorithm_mac == SSL_SHA256 &&
601 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
602 *enc = evp, *md = NULL;
608 const EVP_MD *ssl_md(int idx)
610 idx &= SSL_HANDSHAKE_MAC_MASK;
611 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
613 return ssl_digest_methods[idx];
616 const EVP_MD *ssl_handshake_md(SSL *s)
618 return ssl_md(ssl_get_algorithm2(s));
621 const EVP_MD *ssl_prf_md(SSL *s)
623 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
626 #define ITEM_SEP(a) \
627 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
629 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
636 if (curr->prev != NULL)
637 curr->prev->next = curr->next;
638 if (curr->next != NULL)
639 curr->next->prev = curr->prev;
640 (*tail)->next = curr;
646 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
653 if (curr->next != NULL)
654 curr->next->prev = curr->prev;
655 if (curr->prev != NULL)
656 curr->prev->next = curr->next;
657 (*head)->prev = curr;
663 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
665 uint32_t disabled_mkey,
666 uint32_t disabled_auth,
667 uint32_t disabled_enc,
668 uint32_t disabled_mac,
669 CIPHER_ORDER *co_list,
670 CIPHER_ORDER **head_p,
671 CIPHER_ORDER **tail_p)
677 * We have num_of_ciphers descriptions compiled in, depending on the
678 * method selected (SSLv3, TLSv1 etc).
679 * These will later be sorted in a linked list with at most num
683 /* Get the initial list of ciphers */
684 co_list_num = 0; /* actual count of ciphers */
685 for (i = 0; i < num_of_ciphers; i++) {
686 c = ssl_method->get_cipher(i);
687 /* drop those that use any of that is not available */
688 if (c == NULL || !c->valid)
690 if (FIPS_mode() && (c->algo_strength & SSL_FIPS))
692 if ((c->algorithm_mkey & disabled_mkey) ||
693 (c->algorithm_auth & disabled_auth) ||
694 (c->algorithm_enc & disabled_enc) ||
695 (c->algorithm_mac & disabled_mac))
697 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
700 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
704 co_list[co_list_num].cipher = c;
705 co_list[co_list_num].next = NULL;
706 co_list[co_list_num].prev = NULL;
707 co_list[co_list_num].active = 0;
710 * if (!sk_push(ca_list,(char *)c)) goto err;
715 * Prepare linked list from list entries
717 if (co_list_num > 0) {
718 co_list[0].prev = NULL;
720 if (co_list_num > 1) {
721 co_list[0].next = &co_list[1];
723 for (i = 1; i < co_list_num - 1; i++) {
724 co_list[i].prev = &co_list[i - 1];
725 co_list[i].next = &co_list[i + 1];
728 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
731 co_list[co_list_num - 1].next = NULL;
733 *head_p = &co_list[0];
734 *tail_p = &co_list[co_list_num - 1];
738 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
739 int num_of_group_aliases,
740 uint32_t disabled_mkey,
741 uint32_t disabled_auth,
742 uint32_t disabled_enc,
743 uint32_t disabled_mac,
746 CIPHER_ORDER *ciph_curr;
747 const SSL_CIPHER **ca_curr;
749 uint32_t mask_mkey = ~disabled_mkey;
750 uint32_t mask_auth = ~disabled_auth;
751 uint32_t mask_enc = ~disabled_enc;
752 uint32_t mask_mac = ~disabled_mac;
755 * First, add the real ciphers as already collected
759 while (ciph_curr != NULL) {
760 *ca_curr = ciph_curr->cipher;
762 ciph_curr = ciph_curr->next;
766 * Now we add the available ones from the cipher_aliases[] table.
767 * They represent either one or more algorithms, some of which
768 * in any affected category must be supported (set in enabled_mask),
769 * or represent a cipher strength value (will be added in any case because algorithms=0).
771 for (i = 0; i < num_of_group_aliases; i++) {
772 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
773 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
774 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
775 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
778 if ((algorithm_mkey & mask_mkey) == 0)
782 if ((algorithm_auth & mask_auth) == 0)
786 if ((algorithm_enc & mask_enc) == 0)
790 if ((algorithm_mac & mask_mac) == 0)
793 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
797 *ca_curr = NULL; /* end of list */
800 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
801 uint32_t alg_auth, uint32_t alg_enc,
802 uint32_t alg_mac, int min_tls,
803 uint32_t algo_strength, int rule,
804 int32_t strength_bits, CIPHER_ORDER **head_p,
805 CIPHER_ORDER **tail_p)
807 CIPHER_ORDER *head, *tail, *curr, *next, *last;
808 const SSL_CIPHER *cp;
813 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
814 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
815 algo_strength, strength_bits);
818 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
819 reverse = 1; /* needed to maintain sorting between currently
843 next = reverse ? curr->prev : curr->next;
848 * Selection criteria is either the value of strength_bits
849 * or the algorithms used.
851 if (strength_bits >= 0) {
852 if (strength_bits != cp->strength_bits)
857 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
858 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
859 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
862 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
864 if (alg_auth && !(alg_auth & cp->algorithm_auth))
866 if (alg_enc && !(alg_enc & cp->algorithm_enc))
868 if (alg_mac && !(alg_mac & cp->algorithm_mac))
870 if (min_tls && (min_tls != cp->min_tls))
872 if ((algo_strength & SSL_STRONG_MASK)
873 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
875 if ((algo_strength & SSL_DEFAULT_MASK)
876 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
881 fprintf(stderr, "Action = %d\n", rule);
884 /* add the cipher if it has not been added yet. */
885 if (rule == CIPHER_ADD) {
888 ll_append_tail(&head, curr, &tail);
892 /* Move the added cipher to this location */
893 else if (rule == CIPHER_ORD) {
896 ll_append_tail(&head, curr, &tail);
898 } else if (rule == CIPHER_DEL) {
902 * most recently deleted ciphersuites get best positions for
903 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
904 * in reverse to maintain the order)
906 ll_append_head(&head, curr, &tail);
909 } else if (rule == CIPHER_BUMP) {
911 ll_append_head(&head, curr, &tail);
912 } else if (rule == CIPHER_KILL) {
917 curr->prev->next = curr->next;
921 if (curr->next != NULL)
922 curr->next->prev = curr->prev;
923 if (curr->prev != NULL)
924 curr->prev->next = curr->next;
934 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
935 CIPHER_ORDER **tail_p)
937 int32_t max_strength_bits;
942 * This routine sorts the ciphers with descending strength. The sorting
943 * must keep the pre-sorted sequence, so we apply the normal sorting
944 * routine as '+' movement to the end of the list.
946 max_strength_bits = 0;
948 while (curr != NULL) {
949 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
950 max_strength_bits = curr->cipher->strength_bits;
954 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
955 if (number_uses == NULL) {
956 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
961 * Now find the strength_bits values actually used
964 while (curr != NULL) {
966 number_uses[curr->cipher->strength_bits]++;
970 * Go through the list of used strength_bits values in descending
973 for (i = max_strength_bits; i >= 0; i--)
974 if (number_uses[i] > 0)
975 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
978 OPENSSL_free(number_uses);
982 static int ssl_cipher_process_rulestr(const char *rule_str,
983 CIPHER_ORDER **head_p,
984 CIPHER_ORDER **tail_p,
985 const SSL_CIPHER **ca_list, CERT *c)
987 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
990 int j, multi, found, rule, retval, ok, buflen;
991 uint32_t cipher_id = 0;
1004 } else if (ch == '+') {
1007 } else if (ch == '!') {
1010 } else if (ch == '@') {
1011 rule = CIPHER_SPECIAL;
1033 #ifndef CHARSET_EBCDIC
1034 while (((ch >= 'A') && (ch <= 'Z')) ||
1035 ((ch >= '0') && (ch <= '9')) ||
1036 ((ch >= 'a') && (ch <= 'z')) ||
1037 (ch == '-') || (ch == '.') || (ch == '='))
1039 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.')
1049 * We hit something we cannot deal with,
1050 * it is no command or separator nor
1051 * alphanumeric, so we call this an error.
1053 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1059 if (rule == CIPHER_SPECIAL) {
1060 found = 0; /* unused -- avoid compiler warning */
1061 break; /* special treatment */
1064 /* check for multi-part specification */
1072 * Now search for the cipher alias in the ca_list. Be careful
1073 * with the strncmp, because the "buflen" limitation
1074 * will make the rule "ADH:SOME" and the cipher
1075 * "ADH-MY-CIPHER" look like a match for buflen=3.
1076 * So additionally check whether the cipher name found
1077 * has the correct length. We can save a strlen() call:
1078 * just checking for the '\0' at the right place is
1079 * sufficient, we have to strncmp() anyway. (We cannot
1080 * use strcmp(), because buf is not '\0' terminated.)
1084 while (ca_list[j]) {
1085 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1086 && (ca_list[j]->name[buflen] == '\0')) {
1094 break; /* ignore this entry */
1096 if (ca_list[j]->algorithm_mkey) {
1098 alg_mkey &= ca_list[j]->algorithm_mkey;
1104 alg_mkey = ca_list[j]->algorithm_mkey;
1107 if (ca_list[j]->algorithm_auth) {
1109 alg_auth &= ca_list[j]->algorithm_auth;
1115 alg_auth = ca_list[j]->algorithm_auth;
1118 if (ca_list[j]->algorithm_enc) {
1120 alg_enc &= ca_list[j]->algorithm_enc;
1126 alg_enc = ca_list[j]->algorithm_enc;
1129 if (ca_list[j]->algorithm_mac) {
1131 alg_mac &= ca_list[j]->algorithm_mac;
1137 alg_mac = ca_list[j]->algorithm_mac;
1140 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1141 if (algo_strength & SSL_STRONG_MASK) {
1143 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1145 if (!(algo_strength & SSL_STRONG_MASK)) {
1150 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1153 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1154 if (algo_strength & SSL_DEFAULT_MASK) {
1156 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1158 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1164 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1167 if (ca_list[j]->valid) {
1169 * explicit ciphersuite found; its protocol version does not
1170 * become part of the search pattern!
1173 cipher_id = ca_list[j]->id;
1176 * not an explicit ciphersuite; only in this case, the
1177 * protocol version is considered part of the search pattern
1180 if (ca_list[j]->min_tls) {
1181 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1185 min_tls = ca_list[j]->min_tls;
1195 * Ok, we have the rule, now apply it
1197 if (rule == CIPHER_SPECIAL) { /* special command */
1199 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0)
1200 ok = ssl_cipher_strength_sort(head_p, tail_p);
1201 else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
1202 int level = buf[9] - '0';
1203 if (level < 0 || level > 5) {
1204 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1205 SSL_R_INVALID_COMMAND);
1207 c->sec_level = level;
1211 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1215 * We do not support any "multi" options
1216 * together with "@", so throw away the
1217 * rest of the command, if any left, until
1218 * end or ':' is found.
1220 while ((*l != '\0') && !ITEM_SEP(*l))
1223 ssl_cipher_apply_rule(cipher_id,
1224 alg_mkey, alg_auth, alg_enc, alg_mac,
1225 min_tls, algo_strength, rule, -1, head_p,
1228 while ((*l != '\0') && !ITEM_SEP(*l))
1238 #ifndef OPENSSL_NO_EC
1239 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1240 const char **prule_str)
1242 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1243 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1244 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1245 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1247 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1248 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1249 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1250 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1251 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1255 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1256 c->cert_flags |= suiteb_flags;
1258 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1262 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1264 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1265 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1266 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1269 # ifndef OPENSSL_NO_EC
1270 switch (suiteb_flags) {
1271 case SSL_CERT_FLAG_SUITEB_128_LOS:
1273 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1276 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1278 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1279 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1281 case SSL_CERT_FLAG_SUITEB_192_LOS:
1282 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1287 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1293 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1294 **cipher_list, STACK_OF(SSL_CIPHER)
1295 **cipher_list_by_id,
1296 const char *rule_str, CERT *c)
1298 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1299 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1300 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1302 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1303 const SSL_CIPHER **ca_list = NULL;
1306 * Return with error if nothing to do.
1308 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1310 #ifndef OPENSSL_NO_EC
1311 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1316 * To reduce the work to do we only want to process the compiled
1317 * in algorithms, so we first get the mask of disabled ciphers.
1320 disabled_mkey = disabled_mkey_mask;
1321 disabled_auth = disabled_auth_mask;
1322 disabled_enc = disabled_enc_mask;
1323 disabled_mac = disabled_mac_mask;
1326 * Now we have to collect the available ciphers from the compiled
1327 * in ciphers. We cannot get more than the number compiled in, so
1328 * it is used for allocation.
1330 num_of_ciphers = ssl_method->num_ciphers();
1332 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1333 if (co_list == NULL) {
1334 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1335 return (NULL); /* Failure */
1338 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1339 disabled_mkey, disabled_auth, disabled_enc,
1340 disabled_mac, co_list, &head, &tail);
1342 /* Now arrange all ciphers by preference. */
1345 * Everything else being equal, prefer ephemeral ECDH over other key
1346 * exchange mechanisms.
1347 * For consistency, prefer ECDSA over RSA (though this only matters if the
1348 * server has both certificates, and is using the DEFAULT, or a client
1351 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1353 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1355 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1358 /* Within each strength group, we prefer GCM over CHACHA... */
1359 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1361 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1365 * ...and generally, our preferred cipher is AES.
1366 * Note that AEADs will be bumped to take preference after sorting by
1369 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1372 /* Temporarily enable everything else for sorting */
1373 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1375 /* Low priority for MD5 */
1376 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1380 * Move anonymous ciphers to the end. Usually, these will remain
1381 * disabled. (For applications that allow them, they aren't too bad, but
1382 * we prefer authenticated ciphers.)
1384 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1387 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1389 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1392 /* RC4 is sort-of broken -- move the the end */
1393 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1397 * Now sort by symmetric encryption strength. The above ordering remains
1398 * in force within each class
1400 if (!ssl_cipher_strength_sort(&head, &tail)) {
1401 OPENSSL_free(co_list);
1406 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1407 * TODO(openssl-team): is there an easier way to accomplish all this?
1409 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
1413 * Irrespective of strength, enforce the following order:
1414 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1415 * Within each group, ciphers remain sorted by strength and previous
1420 * 4) TLS 1.2 > legacy
1422 * Because we now bump ciphers to the top of the list, we proceed in
1423 * reverse order of preference.
1425 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1427 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
1428 CIPHER_BUMP, -1, &head, &tail);
1429 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
1430 CIPHER_BUMP, -1, &head, &tail);
1432 /* Now disable everything (maintaining the ordering!) */
1433 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1436 * We also need cipher aliases for selecting based on the rule_str.
1437 * There might be two types of entries in the rule_str: 1) names
1438 * of ciphers themselves 2) aliases for groups of ciphers.
1439 * For 1) we need the available ciphers and for 2) the cipher
1440 * groups of cipher_aliases added together in one list (otherwise
1441 * we would be happy with just the cipher_aliases table).
1443 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
1444 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1445 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
1446 if (ca_list == NULL) {
1447 OPENSSL_free(co_list);
1448 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1449 return (NULL); /* Failure */
1451 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1452 disabled_mkey, disabled_auth, disabled_enc,
1453 disabled_mac, head);
1456 * If the rule_string begins with DEFAULT, apply the default rule
1457 * before using the (possibly available) additional rules.
1461 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1462 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1463 &head, &tail, ca_list, c);
1469 if (ok && (strlen(rule_p) > 0))
1470 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1472 OPENSSL_free(ca_list); /* Not needed anymore */
1474 if (!ok) { /* Rule processing failure */
1475 OPENSSL_free(co_list);
1480 * Allocate new "cipherstack" for the result, return with error
1481 * if we cannot get one.
1483 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1484 OPENSSL_free(co_list);
1489 * The cipher selection for the list is done. The ciphers are added
1490 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1492 for (curr = head; curr != NULL; curr = curr->next) {
1494 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) {
1495 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1496 OPENSSL_free(co_list);
1497 sk_SSL_CIPHER_free(cipherstack);
1501 fprintf(stderr, "<%s>\n", curr->cipher->name);
1505 OPENSSL_free(co_list); /* Not needed any longer */
1507 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1508 if (tmp_cipher_list == NULL) {
1509 sk_SSL_CIPHER_free(cipherstack);
1512 sk_SSL_CIPHER_free(*cipher_list);
1513 *cipher_list = cipherstack;
1514 if (*cipher_list_by_id != NULL)
1515 sk_SSL_CIPHER_free(*cipher_list_by_id);
1516 *cipher_list_by_id = tmp_cipher_list;
1517 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1519 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1520 return (cipherstack);
1523 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1526 const char *kx, *au, *enc, *mac;
1527 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1528 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
1532 buf = OPENSSL_malloc(len);
1535 } else if (len < 128)
1538 alg_mkey = cipher->algorithm_mkey;
1539 alg_auth = cipher->algorithm_auth;
1540 alg_enc = cipher->algorithm_enc;
1541 alg_mac = cipher->algorithm_mac;
1543 ver = ssl_protocol_to_string(cipher->min_tls);
1599 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1600 case (SSL_aGOST12 | SSL_aGOST01):
1634 enc = "AESGCM(128)";
1637 enc = "AESGCM(256)";
1640 enc = "AESCCM(128)";
1643 enc = "AESCCM(256)";
1645 case SSL_AES128CCM8:
1646 enc = "AESCCM8(128)";
1648 case SSL_AES256CCM8:
1649 enc = "AESCCM8(256)";
1651 case SSL_CAMELLIA128:
1652 enc = "Camellia(128)";
1654 case SSL_CAMELLIA256:
1655 enc = "Camellia(256)";
1660 case SSL_eGOST2814789CNT:
1661 case SSL_eGOST2814789CNT12:
1662 enc = "GOST89(256)";
1664 case SSL_CHACHA20POLY1305:
1665 enc = "CHACHA20/POLY1305(256)";
1689 case SSL_GOST89MAC12:
1695 case SSL_GOST12_256:
1696 case SSL_GOST12_512:
1704 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1709 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1715 * Backwards-compatibility crutch. In almost all contexts we report TLS
1716 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1718 if (c->min_tls == TLS1_VERSION)
1720 return ssl_protocol_to_string(c->min_tls);
1723 /* return the actual cipher being used */
1724 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1731 /* number of bits for symmetric cipher */
1732 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1737 if (alg_bits != NULL)
1738 *alg_bits = (int)c->alg_bits;
1739 ret = (int)c->strength_bits;
1744 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1749 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1754 if ((n == 0) || (sk == NULL))
1756 nn = sk_SSL_COMP_num(sk);
1757 for (i = 0; i < nn; i++) {
1758 ctmp = sk_SSL_COMP_value(sk, i);
1765 #ifdef OPENSSL_NO_COMP
1766 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1771 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1777 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1783 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1785 load_builtin_compressions();
1786 return (ssl_comp_methods);
1789 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1792 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1793 ssl_comp_methods = meths;
1797 static void cmeth_free(SSL_COMP *cm)
1802 void ssl_comp_free_compression_methods_int(void)
1804 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1805 ssl_comp_methods = NULL;
1806 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1809 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1813 if (cm == NULL || COMP_get_type(cm) == NID_undef)
1817 * According to draft-ietf-tls-compression-04.txt, the
1818 * compression number ranges should be the following:
1820 * 0 to 63: methods defined by the IETF
1821 * 64 to 192: external party methods assigned by IANA
1822 * 193 to 255: reserved for private use
1824 if (id < 193 || id > 255) {
1825 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1826 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1830 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
1831 comp = OPENSSL_malloc(sizeof(*comp));
1833 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1834 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1840 load_builtin_compressions();
1841 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1843 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1844 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1845 SSL_R_DUPLICATE_COMPRESSION_ID);
1848 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
1850 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1851 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1854 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1859 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1861 #ifndef OPENSSL_NO_COMP
1862 return comp ? COMP_get_name(comp) : NULL;
1868 const char *SSL_COMP_get0_name(const SSL_COMP *comp)
1870 #ifndef OPENSSL_NO_COMP
1877 int SSL_COMP_get_id(const SSL_COMP *comp)
1879 #ifndef OPENSSL_NO_COMP
1886 /* For a cipher return the index corresponding to the certificate type */
1887 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1891 alg_a = c->algorithm_auth;
1893 if (alg_a & SSL_aECDSA)
1894 return SSL_PKEY_ECC;
1895 else if (alg_a & SSL_aDSS)
1896 return SSL_PKEY_DSA_SIGN;
1897 else if (alg_a & SSL_aRSA)
1898 return SSL_PKEY_RSA_ENC;
1899 else if (alg_a & SSL_aGOST12)
1900 return SSL_PKEY_GOST_EC;
1901 else if (alg_a & SSL_aGOST01)
1902 return SSL_PKEY_GOST01;
1907 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
1909 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
1911 if (c == NULL || c->valid == 0)
1916 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
1918 return ssl->method->get_cipher_by_char(ptr);
1921 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1926 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
1929 return ssl_cipher_table_cipher[i].nid;
1932 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1934 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
1938 return ssl_cipher_table_mac[i].nid;
1941 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
1943 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
1947 return ssl_cipher_table_kx[i].nid;
1950 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
1952 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
1956 return ssl_cipher_table_auth[i].nid;
1959 int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
1961 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;