2 * Copyright 1995-2016 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];
106 #define SSL_COMP_NULL_IDX 0
107 #define SSL_COMP_ZLIB_IDX 1
108 #define SSL_COMP_NUM_IDX 2
110 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
112 #ifndef OPENSSL_NO_COMP
113 static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
117 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
121 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
123 /* NB: make sure indices in this table matches values above */
124 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
125 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
126 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
127 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
128 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
129 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
130 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
131 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
132 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
133 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
134 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
135 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
136 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
139 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
140 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
144 static const ssl_cipher_table ssl_cipher_table_kx[] = {
145 {SSL_kRSA, NID_kx_rsa},
146 {SSL_kECDHE, NID_kx_ecdhe},
147 {SSL_kDHE, NID_kx_dhe},
148 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
149 {SSL_kDHEPSK, NID_kx_dhe_psk},
150 {SSL_kRSAPSK, NID_kx_rsa_psk},
151 {SSL_kPSK, NID_kx_psk},
152 {SSL_kSRP, NID_kx_srp},
153 {SSL_kGOST, NID_kx_gost},
154 {SSL_kANY, NID_kx_any}
157 static const ssl_cipher_table ssl_cipher_table_auth[] = {
158 {SSL_aRSA, NID_auth_rsa},
159 {SSL_aECDSA, NID_auth_ecdsa},
160 {SSL_aPSK, NID_auth_psk},
161 {SSL_aDSS, NID_auth_dss},
162 {SSL_aGOST01, NID_auth_gost01},
163 {SSL_aGOST12, NID_auth_gost12},
164 {SSL_aSRP, NID_auth_srp},
165 {SSL_aNULL, NID_auth_null},
166 {SSL_aANY, NID_auth_any}
170 /* Utility function for table lookup */
171 static int ssl_cipher_info_find(const ssl_cipher_table * table,
172 size_t table_cnt, uint32_t mask)
175 for (i = 0; i < table_cnt; i++, table++) {
176 if (table->mask == mask)
182 #define ssl_cipher_info_lookup(table, x) \
183 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
186 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
187 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
190 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
191 /* MD5, SHA, GOST94, MAC89 */
192 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
193 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
194 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
199 static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX];
202 #define CIPHER_KILL 2
205 #define CIPHER_SPECIAL 5
207 * Bump the ciphers to the top of the list.
208 * This rule isn't currently supported by the public cipherstring API.
210 #define CIPHER_BUMP 6
212 typedef struct cipher_order_st {
213 const SSL_CIPHER *cipher;
216 struct cipher_order_st *next, *prev;
219 static const SSL_CIPHER cipher_aliases[] = {
220 /* "ALL" doesn't include eNULL (must be specifically enabled) */
221 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL},
222 /* "COMPLEMENTOFALL" */
223 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL},
226 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
229 {0, SSL_TXT_CMPDEF, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
232 * key exchange aliases (some of those using only a single bit here
233 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
234 * combines DHE_DSS and DHE_RSA)
236 {0, SSL_TXT_kRSA, 0, SSL_kRSA},
238 {0, SSL_TXT_kEDH, 0, SSL_kDHE},
239 {0, SSL_TXT_kDHE, 0, SSL_kDHE},
240 {0, SSL_TXT_DH, 0, SSL_kDHE},
242 {0, SSL_TXT_kEECDH, 0, SSL_kECDHE},
243 {0, SSL_TXT_kECDHE, 0, SSL_kECDHE},
244 {0, SSL_TXT_ECDH, 0, SSL_kECDHE},
246 {0, SSL_TXT_kPSK, 0, SSL_kPSK},
247 {0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK},
248 {0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK},
249 {0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK},
250 {0, SSL_TXT_kSRP, 0, SSL_kSRP},
251 {0, SSL_TXT_kGOST, 0, SSL_kGOST},
253 /* server authentication aliases */
254 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA},
255 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS},
256 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS},
257 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL},
258 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA},
259 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA},
260 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK},
261 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01},
262 {0, SSL_TXT_aGOST12, 0, 0, SSL_aGOST12},
263 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01 | SSL_aGOST12},
264 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP},
266 /* aliases combining key exchange and server authentication */
267 {0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL},
268 {0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL},
269 {0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL},
270 {0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL},
271 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL},
272 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA},
273 {0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL},
274 {0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL},
275 {0, SSL_TXT_PSK, 0, SSL_PSK},
276 {0, SSL_TXT_SRP, 0, SSL_kSRP},
278 /* symmetric encryption aliases */
279 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES},
280 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4},
281 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2},
282 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA},
283 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED},
284 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL},
285 {0, SSL_TXT_GOST, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12},
286 {0, SSL_TXT_AES128, 0, 0, 0,
287 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
288 {0, SSL_TXT_AES256, 0, 0, 0,
289 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
290 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES},
291 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
292 {0, SSL_TXT_AES_CCM, 0, 0, 0,
293 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
294 {0, SSL_TXT_AES_CCM_8, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
295 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128},
296 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256},
297 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA},
298 {0, SSL_TXT_CHACHA20, 0, 0, 0, SSL_CHACHA20},
301 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5},
302 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1},
303 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1},
304 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94},
305 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
306 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256},
307 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384},
308 {0, SSL_TXT_GOST12, 0, 0, 0, 0, SSL_GOST12_256},
310 /* protocol version aliases */
311 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL3_VERSION},
312 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, TLS1_VERSION},
313 {0, "TLSv1.0", 0, 0, 0, 0, 0, TLS1_VERSION},
314 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, TLS1_2_VERSION},
316 /* strength classes */
317 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
318 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
319 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
320 /* FIPS 140-2 approved ciphersuite */
321 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
323 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
324 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, 0,
325 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
326 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, 0,
327 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
332 * Search for public key algorithm with given name and return its pkey_id if
333 * it is available. Otherwise return 0
335 #ifdef OPENSSL_NO_ENGINE
337 static int get_optional_pkey_id(const char *pkey_name)
339 const EVP_PKEY_ASN1_METHOD *ameth;
341 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
342 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
351 static int get_optional_pkey_id(const char *pkey_name)
353 const EVP_PKEY_ASN1_METHOD *ameth;
354 ENGINE *tmpeng = NULL;
356 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
358 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
362 ENGINE_finish(tmpeng);
368 /* masks of disabled algorithms */
369 static uint32_t disabled_enc_mask;
370 static uint32_t disabled_mac_mask;
371 static uint32_t disabled_mkey_mask;
372 static uint32_t disabled_auth_mask;
374 void ssl_load_ciphers(void)
377 const ssl_cipher_table *t;
379 disabled_enc_mask = 0;
380 ssl_sort_cipher_list();
381 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
382 if (t->nid == NID_undef) {
383 ssl_cipher_methods[i] = NULL;
385 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
386 ssl_cipher_methods[i] = cipher;
388 disabled_enc_mask |= t->mask;
391 #ifdef SSL_FORBID_ENULL
392 disabled_enc_mask |= SSL_eNULL;
394 disabled_mac_mask = 0;
395 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
396 const EVP_MD *md = EVP_get_digestbynid(t->nid);
397 ssl_digest_methods[i] = md;
399 disabled_mac_mask |= t->mask;
401 int tmpsize = EVP_MD_size(md);
402 OPENSSL_assert(tmpsize >= 0);
403 ssl_mac_secret_size[i] = tmpsize;
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 size_t *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)
580 if (c->algorithm_enc == SSL_RC4 &&
581 c->algorithm_mac == SSL_MD5 &&
582 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
583 *enc = evp, *md = NULL;
584 else if (c->algorithm_enc == SSL_AES128 &&
585 c->algorithm_mac == SSL_SHA1 &&
586 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
587 *enc = evp, *md = NULL;
588 else if (c->algorithm_enc == SSL_AES256 &&
589 c->algorithm_mac == SSL_SHA1 &&
590 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
591 *enc = evp, *md = NULL;
592 else if (c->algorithm_enc == SSL_AES128 &&
593 c->algorithm_mac == SSL_SHA256 &&
594 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
595 *enc = evp, *md = NULL;
596 else if (c->algorithm_enc == SSL_AES256 &&
597 c->algorithm_mac == SSL_SHA256 &&
598 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
599 *enc = evp, *md = NULL;
605 const EVP_MD *ssl_md(int idx)
607 idx &= SSL_HANDSHAKE_MAC_MASK;
608 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
610 return ssl_digest_methods[idx];
613 const EVP_MD *ssl_handshake_md(SSL *s)
615 return ssl_md(ssl_get_algorithm2(s));
618 const EVP_MD *ssl_prf_md(SSL *s)
620 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
623 #define ITEM_SEP(a) \
624 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
626 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
633 if (curr->prev != NULL)
634 curr->prev->next = curr->next;
635 if (curr->next != NULL)
636 curr->next->prev = curr->prev;
637 (*tail)->next = curr;
643 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
650 if (curr->next != NULL)
651 curr->next->prev = curr->prev;
652 if (curr->prev != NULL)
653 curr->prev->next = curr->next;
654 (*head)->prev = curr;
660 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
662 uint32_t disabled_mkey,
663 uint32_t disabled_auth,
664 uint32_t disabled_enc,
665 uint32_t disabled_mac,
666 CIPHER_ORDER *co_list,
667 CIPHER_ORDER **head_p,
668 CIPHER_ORDER **tail_p)
674 * We have num_of_ciphers descriptions compiled in, depending on the
675 * method selected (SSLv3, TLSv1 etc).
676 * These will later be sorted in a linked list with at most num
680 /* Get the initial list of ciphers */
681 co_list_num = 0; /* actual count of ciphers */
682 for (i = 0; i < num_of_ciphers; i++) {
683 c = ssl_method->get_cipher(i);
684 /* drop those that use any of that is not available */
685 if (c == NULL || !c->valid)
687 if ((c->algorithm_mkey & disabled_mkey) ||
688 (c->algorithm_auth & disabled_auth) ||
689 (c->algorithm_enc & disabled_enc) ||
690 (c->algorithm_mac & disabled_mac))
692 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
695 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
699 co_list[co_list_num].cipher = c;
700 co_list[co_list_num].next = NULL;
701 co_list[co_list_num].prev = NULL;
702 co_list[co_list_num].active = 0;
705 * if (!sk_push(ca_list,(char *)c)) goto err;
710 * Prepare linked list from list entries
712 if (co_list_num > 0) {
713 co_list[0].prev = NULL;
715 if (co_list_num > 1) {
716 co_list[0].next = &co_list[1];
718 for (i = 1; i < co_list_num - 1; i++) {
719 co_list[i].prev = &co_list[i - 1];
720 co_list[i].next = &co_list[i + 1];
723 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
726 co_list[co_list_num - 1].next = NULL;
728 *head_p = &co_list[0];
729 *tail_p = &co_list[co_list_num - 1];
733 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
734 int num_of_group_aliases,
735 uint32_t disabled_mkey,
736 uint32_t disabled_auth,
737 uint32_t disabled_enc,
738 uint32_t disabled_mac,
741 CIPHER_ORDER *ciph_curr;
742 const SSL_CIPHER **ca_curr;
744 uint32_t mask_mkey = ~disabled_mkey;
745 uint32_t mask_auth = ~disabled_auth;
746 uint32_t mask_enc = ~disabled_enc;
747 uint32_t mask_mac = ~disabled_mac;
750 * First, add the real ciphers as already collected
754 while (ciph_curr != NULL) {
755 *ca_curr = ciph_curr->cipher;
757 ciph_curr = ciph_curr->next;
761 * Now we add the available ones from the cipher_aliases[] table.
762 * They represent either one or more algorithms, some of which
763 * in any affected category must be supported (set in enabled_mask),
764 * or represent a cipher strength value (will be added in any case because algorithms=0).
766 for (i = 0; i < num_of_group_aliases; i++) {
767 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
768 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
769 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
770 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
773 if ((algorithm_mkey & mask_mkey) == 0)
777 if ((algorithm_auth & mask_auth) == 0)
781 if ((algorithm_enc & mask_enc) == 0)
785 if ((algorithm_mac & mask_mac) == 0)
788 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
792 *ca_curr = NULL; /* end of list */
795 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
796 uint32_t alg_auth, uint32_t alg_enc,
797 uint32_t alg_mac, int min_tls,
798 uint32_t algo_strength, int rule,
799 int32_t strength_bits, CIPHER_ORDER **head_p,
800 CIPHER_ORDER **tail_p)
802 CIPHER_ORDER *head, *tail, *curr, *next, *last;
803 const SSL_CIPHER *cp;
808 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
809 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
810 algo_strength, strength_bits);
813 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
814 reverse = 1; /* needed to maintain sorting between currently
838 next = reverse ? curr->prev : curr->next;
843 * Selection criteria is either the value of strength_bits
844 * or the algorithms used.
846 if (strength_bits >= 0) {
847 if (strength_bits != cp->strength_bits)
852 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
853 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
854 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
857 if (cipher_id != 0 && (cipher_id != cp->id))
859 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
861 if (alg_auth && !(alg_auth & cp->algorithm_auth))
863 if (alg_enc && !(alg_enc & cp->algorithm_enc))
865 if (alg_mac && !(alg_mac & cp->algorithm_mac))
867 if (min_tls && (min_tls != cp->min_tls))
869 if ((algo_strength & SSL_STRONG_MASK)
870 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
872 if ((algo_strength & SSL_DEFAULT_MASK)
873 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
878 fprintf(stderr, "Action = %d\n", rule);
881 /* add the cipher if it has not been added yet. */
882 if (rule == CIPHER_ADD) {
885 ll_append_tail(&head, curr, &tail);
889 /* Move the added cipher to this location */
890 else if (rule == CIPHER_ORD) {
893 ll_append_tail(&head, curr, &tail);
895 } else if (rule == CIPHER_DEL) {
899 * most recently deleted ciphersuites get best positions for
900 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
901 * in reverse to maintain the order)
903 ll_append_head(&head, curr, &tail);
906 } else if (rule == CIPHER_BUMP) {
908 ll_append_head(&head, curr, &tail);
909 } else if (rule == CIPHER_KILL) {
914 curr->prev->next = curr->next;
918 if (curr->next != NULL)
919 curr->next->prev = curr->prev;
920 if (curr->prev != NULL)
921 curr->prev->next = curr->next;
931 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
932 CIPHER_ORDER **tail_p)
934 int32_t max_strength_bits;
939 * This routine sorts the ciphers with descending strength. The sorting
940 * must keep the pre-sorted sequence, so we apply the normal sorting
941 * routine as '+' movement to the end of the list.
943 max_strength_bits = 0;
945 while (curr != NULL) {
946 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
947 max_strength_bits = curr->cipher->strength_bits;
951 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
952 if (number_uses == NULL) {
953 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
958 * Now find the strength_bits values actually used
961 while (curr != NULL) {
963 number_uses[curr->cipher->strength_bits]++;
967 * Go through the list of used strength_bits values in descending
970 for (i = max_strength_bits; i >= 0; i--)
971 if (number_uses[i] > 0)
972 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
975 OPENSSL_free(number_uses);
979 static int ssl_cipher_process_rulestr(const char *rule_str,
980 CIPHER_ORDER **head_p,
981 CIPHER_ORDER **tail_p,
982 const SSL_CIPHER **ca_list, CERT *c)
984 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
987 int j, multi, found, rule, retval, ok, buflen;
988 uint32_t cipher_id = 0;
1001 } else if (ch == '+') {
1004 } else if (ch == '!') {
1007 } else if (ch == '@') {
1008 rule = CIPHER_SPECIAL;
1030 #ifndef CHARSET_EBCDIC
1031 while (((ch >= 'A') && (ch <= 'Z')) ||
1032 ((ch >= '0') && (ch <= '9')) ||
1033 ((ch >= 'a') && (ch <= 'z')) ||
1034 (ch == '-') || (ch == '.') || (ch == '='))
1036 while (isalnum(ch) || (ch == '-') || (ch == '.') || (ch == '='))
1045 * We hit something we cannot deal with,
1046 * it is no command or separator nor
1047 * alphanumeric, so we call this an error.
1049 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1055 if (rule == CIPHER_SPECIAL) {
1056 found = 0; /* unused -- avoid compiler warning */
1057 break; /* special treatment */
1060 /* check for multi-part specification */
1068 * Now search for the cipher alias in the ca_list. Be careful
1069 * with the strncmp, because the "buflen" limitation
1070 * will make the rule "ADH:SOME" and the cipher
1071 * "ADH-MY-CIPHER" look like a match for buflen=3.
1072 * So additionally check whether the cipher name found
1073 * has the correct length. We can save a strlen() call:
1074 * just checking for the '\0' at the right place is
1075 * sufficient, we have to strncmp() anyway. (We cannot
1076 * use strcmp(), because buf is not '\0' terminated.)
1080 while (ca_list[j]) {
1081 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1082 && (ca_list[j]->name[buflen] == '\0')) {
1090 break; /* ignore this entry */
1092 if (ca_list[j]->algorithm_mkey) {
1094 alg_mkey &= ca_list[j]->algorithm_mkey;
1100 alg_mkey = ca_list[j]->algorithm_mkey;
1103 if (ca_list[j]->algorithm_auth) {
1105 alg_auth &= ca_list[j]->algorithm_auth;
1111 alg_auth = ca_list[j]->algorithm_auth;
1114 if (ca_list[j]->algorithm_enc) {
1116 alg_enc &= ca_list[j]->algorithm_enc;
1122 alg_enc = ca_list[j]->algorithm_enc;
1125 if (ca_list[j]->algorithm_mac) {
1127 alg_mac &= ca_list[j]->algorithm_mac;
1133 alg_mac = ca_list[j]->algorithm_mac;
1136 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1137 if (algo_strength & SSL_STRONG_MASK) {
1139 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1141 if (!(algo_strength & SSL_STRONG_MASK)) {
1146 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1149 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1150 if (algo_strength & SSL_DEFAULT_MASK) {
1152 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1154 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1160 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1163 if (ca_list[j]->valid) {
1165 * explicit ciphersuite found; its protocol version does not
1166 * become part of the search pattern!
1169 cipher_id = ca_list[j]->id;
1172 * not an explicit ciphersuite; only in this case, the
1173 * protocol version is considered part of the search pattern
1176 if (ca_list[j]->min_tls) {
1177 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1181 min_tls = ca_list[j]->min_tls;
1191 * Ok, we have the rule, now apply it
1193 if (rule == CIPHER_SPECIAL) { /* special command */
1195 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0)
1196 ok = ssl_cipher_strength_sort(head_p, tail_p);
1197 else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
1198 int level = buf[9] - '0';
1199 if (level < 0 || level > 5) {
1200 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1201 SSL_R_INVALID_COMMAND);
1203 c->sec_level = level;
1207 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1211 * We do not support any "multi" options
1212 * together with "@", so throw away the
1213 * rest of the command, if any left, until
1214 * end or ':' is found.
1216 while ((*l != '\0') && !ITEM_SEP(*l))
1219 ssl_cipher_apply_rule(cipher_id,
1220 alg_mkey, alg_auth, alg_enc, alg_mac,
1221 min_tls, algo_strength, rule, -1, head_p,
1224 while ((*l != '\0') && !ITEM_SEP(*l))
1234 #ifndef OPENSSL_NO_EC
1235 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1236 const char **prule_str)
1238 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1239 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1240 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1241 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1243 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1244 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1245 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1246 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1247 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1251 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1252 c->cert_flags |= suiteb_flags;
1254 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1258 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1260 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1261 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1262 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1265 # ifndef OPENSSL_NO_EC
1266 switch (suiteb_flags) {
1267 case SSL_CERT_FLAG_SUITEB_128_LOS:
1269 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1272 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1274 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1275 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1277 case SSL_CERT_FLAG_SUITEB_192_LOS:
1278 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1283 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1289 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1290 **cipher_list, STACK_OF(SSL_CIPHER)
1291 **cipher_list_by_id,
1292 const char *rule_str, CERT *c)
1294 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1295 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1296 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1298 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1299 const SSL_CIPHER **ca_list = NULL;
1302 * Return with error if nothing to do.
1304 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1306 #ifndef OPENSSL_NO_EC
1307 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1312 * To reduce the work to do we only want to process the compiled
1313 * in algorithms, so we first get the mask of disabled ciphers.
1316 disabled_mkey = disabled_mkey_mask;
1317 disabled_auth = disabled_auth_mask;
1318 disabled_enc = disabled_enc_mask;
1319 disabled_mac = disabled_mac_mask;
1322 * Now we have to collect the available ciphers from the compiled
1323 * in ciphers. We cannot get more than the number compiled in, so
1324 * it is used for allocation.
1326 num_of_ciphers = ssl_method->num_ciphers();
1328 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1329 if (co_list == NULL) {
1330 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1331 return (NULL); /* Failure */
1334 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1335 disabled_mkey, disabled_auth, disabled_enc,
1336 disabled_mac, co_list, &head, &tail);
1338 /* Now arrange all ciphers by preference. */
1341 * Everything else being equal, prefer ephemeral ECDH over other key
1342 * exchange mechanisms.
1343 * For consistency, prefer ECDSA over RSA (though this only matters if the
1344 * server has both certificates, and is using the DEFAULT, or a client
1347 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1349 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1351 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1354 /* Within each strength group, we prefer GCM over CHACHA... */
1355 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1357 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1361 * ...and generally, our preferred cipher is AES.
1362 * Note that AEADs will be bumped to take preference after sorting by
1365 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1368 /* Temporarily enable everything else for sorting */
1369 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1371 /* Low priority for MD5 */
1372 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1376 * Move anonymous ciphers to the end. Usually, these will remain
1377 * disabled. (For applications that allow them, they aren't too bad, but
1378 * we prefer authenticated ciphers.)
1380 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1384 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
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 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1495 OPENSSL_free(co_list);
1496 sk_SSL_CIPHER_free(cipherstack);
1500 fprintf(stderr, "<%s>\n", curr->cipher->name);
1504 OPENSSL_free(co_list); /* Not needed any longer */
1506 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1507 if (tmp_cipher_list == NULL) {
1508 sk_SSL_CIPHER_free(cipherstack);
1511 sk_SSL_CIPHER_free(*cipher_list);
1512 *cipher_list = cipherstack;
1513 if (*cipher_list_by_id != NULL)
1514 sk_SSL_CIPHER_free(*cipher_list_by_id);
1515 *cipher_list_by_id = tmp_cipher_list;
1516 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1518 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1519 return (cipherstack);
1522 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1525 const char *kx, *au, *enc, *mac;
1526 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1527 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
1531 buf = OPENSSL_malloc(len);
1534 } else if (len < 128)
1537 alg_mkey = cipher->algorithm_mkey;
1538 alg_auth = cipher->algorithm_auth;
1539 alg_enc = cipher->algorithm_enc;
1540 alg_mac = cipher->algorithm_mac;
1542 ver = ssl_protocol_to_string(cipher->min_tls);
1601 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1602 case (SSL_aGOST12 | SSL_aGOST01):
1639 enc = "AESGCM(128)";
1642 enc = "AESGCM(256)";
1645 enc = "AESCCM(128)";
1648 enc = "AESCCM(256)";
1650 case SSL_AES128CCM8:
1651 enc = "AESCCM8(128)";
1653 case SSL_AES256CCM8:
1654 enc = "AESCCM8(256)";
1656 case SSL_CAMELLIA128:
1657 enc = "Camellia(128)";
1659 case SSL_CAMELLIA256:
1660 enc = "Camellia(256)";
1665 case SSL_eGOST2814789CNT:
1666 case SSL_eGOST2814789CNT12:
1667 enc = "GOST89(256)";
1669 case SSL_CHACHA20POLY1305:
1670 enc = "CHACHA20/POLY1305(256)";
1694 case SSL_GOST89MAC12:
1700 case SSL_GOST12_256:
1701 case SSL_GOST12_512:
1709 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1714 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1720 * Backwards-compatibility crutch. In almost all contexts we report TLS
1721 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1723 if (c->min_tls == TLS1_VERSION)
1725 return ssl_protocol_to_string(c->min_tls);
1728 /* return the actual cipher being used */
1729 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1736 /* number of bits for symmetric cipher */
1737 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1742 if (alg_bits != NULL)
1743 *alg_bits = (int)c->alg_bits;
1744 ret = (int)c->strength_bits;
1749 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1754 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1759 if ((n == 0) || (sk == NULL))
1761 nn = sk_SSL_COMP_num(sk);
1762 for (i = 0; i < nn; i++) {
1763 ctmp = sk_SSL_COMP_value(sk, i);
1770 #ifdef OPENSSL_NO_COMP
1771 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1776 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1782 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1788 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1790 load_builtin_compressions();
1791 return (ssl_comp_methods);
1794 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1797 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1798 ssl_comp_methods = meths;
1802 static void cmeth_free(SSL_COMP *cm)
1807 void ssl_comp_free_compression_methods_int(void)
1809 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1810 ssl_comp_methods = NULL;
1811 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1814 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1818 if (cm == NULL || COMP_get_type(cm) == NID_undef)
1822 * According to draft-ietf-tls-compression-04.txt, the
1823 * compression number ranges should be the following:
1825 * 0 to 63: methods defined by the IETF
1826 * 64 to 192: external party methods assigned by IANA
1827 * 193 to 255: reserved for private use
1829 if (id < 193 || id > 255) {
1830 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1831 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1835 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
1836 comp = OPENSSL_malloc(sizeof(*comp));
1838 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1839 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1845 load_builtin_compressions();
1846 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1848 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1849 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1850 SSL_R_DUPLICATE_COMPRESSION_ID);
1853 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
1855 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1856 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1859 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1864 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1866 #ifndef OPENSSL_NO_COMP
1867 return comp ? COMP_get_name(comp) : NULL;
1873 const char *SSL_COMP_get0_name(const SSL_COMP *comp)
1875 #ifndef OPENSSL_NO_COMP
1882 int SSL_COMP_get_id(const SSL_COMP *comp)
1884 #ifndef OPENSSL_NO_COMP
1891 /* For a cipher return the index corresponding to the certificate type */
1892 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1896 alg_a = c->algorithm_auth;
1898 if (alg_a & SSL_aECDSA)
1899 return SSL_PKEY_ECC;
1900 else if (alg_a & SSL_aDSS)
1901 return SSL_PKEY_DSA_SIGN;
1902 else if (alg_a & SSL_aRSA)
1903 return SSL_PKEY_RSA;
1904 else if (alg_a & SSL_aGOST12)
1905 return SSL_PKEY_GOST_EC;
1906 else if (alg_a & SSL_aGOST01)
1907 return SSL_PKEY_GOST01;
1912 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr,
1915 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
1917 if (c == NULL || (!all && c->valid == 0))
1922 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
1924 return ssl->method->get_cipher_by_char(ptr);
1927 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1932 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
1935 return ssl_cipher_table_cipher[i].nid;
1938 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1940 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
1944 return ssl_cipher_table_mac[i].nid;
1947 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
1949 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
1953 return ssl_cipher_table_kx[i].nid;
1956 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
1958 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
1962 return ssl_cipher_table_auth[i].nid;
1965 int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
1967 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
1970 int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
1971 size_t *int_overhead, size_t *blocksize,
1972 size_t *ext_overhead)
1974 size_t mac = 0, in = 0, blk = 0, out = 0;
1976 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
1977 * because there are no handy #defines for those. */
1978 if (c->algorithm_enc & SSL_AESGCM) {
1979 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
1980 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
1981 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
1982 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
1983 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
1984 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
1986 } else if (c->algorithm_mac & SSL_AEAD) {
1987 /* We're supposed to have handled all the AEAD modes above */
1990 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
1991 int digest_nid = SSL_CIPHER_get_digest_nid(c);
1992 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
1997 mac = EVP_MD_size(e_md);
1998 if (c->algorithm_enc != SSL_eNULL) {
1999 int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
2000 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
2002 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
2003 known CBC cipher. */
2004 if (e_ciph == NULL ||
2005 EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE)
2008 in = 1; /* padding length byte */
2009 out = EVP_CIPHER_iv_length(e_ciph);
2010 blk = EVP_CIPHER_block_size(e_ciph);
2014 *mac_overhead = mac;
2017 *ext_overhead = out;