2 * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4 * Copyright 2005 Nokia. All rights reserved.
6 * Licensed under the Apache License 2.0 (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
12 /* We need to use some engine deprecated APIs */
13 #define OPENSSL_SUPPRESS_DEPRECATED
17 #include <openssl/objects.h>
18 #include <openssl/comp.h>
19 #include <openssl/engine.h>
20 #include <openssl/crypto.h>
21 #include <openssl/conf.h>
22 #include <openssl/trace.h>
23 #include "internal/nelem.h"
24 #include "ssl_local.h"
25 #include "internal/thread_once.h"
26 #include "internal/cryptlib.h"
28 DEFINE_STACK_OF(SSL_COMP)
29 DEFINE_STACK_OF_CONST(SSL_CIPHER)
31 /* NB: make sure indices in these tables match values above */
38 /* Table of NIDs for each cipher */
39 static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
40 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
41 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
42 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
43 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
44 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
45 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
46 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
47 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
48 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
49 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
50 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
51 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
52 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
53 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
54 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
55 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
56 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
57 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
58 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
59 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
60 {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
61 {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
62 {SSL_MAGMA, NID_magma_ctr_acpkm}, /* SSL_ENC_MAGMA_IDX */
63 {SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm}, /* SSL_ENC_KUZNYECHIK_IDX */
66 #define SSL_COMP_NULL_IDX 0
67 #define SSL_COMP_ZLIB_IDX 1
68 #define SSL_COMP_NUM_IDX 2
70 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
72 #ifndef OPENSSL_NO_COMP
73 static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
76 /* NB: make sure indices in this table matches values above */
77 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
78 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
79 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
80 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
81 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
82 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
83 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
84 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
85 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
86 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
87 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
88 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
89 {0, NID_sha512}, /* SSL_MD_SHA512_IDX 11 */
90 {SSL_MAGMAOMAC, NID_magma_mac}, /* sSL_MD_MAGMAOMAC_IDX */
91 {SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac} /* SSL_MD_KUZNYECHIKOMAC_IDX */
95 static const ssl_cipher_table ssl_cipher_table_kx[] = {
96 {SSL_kRSA, NID_kx_rsa},
97 {SSL_kECDHE, NID_kx_ecdhe},
98 {SSL_kDHE, NID_kx_dhe},
99 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
100 {SSL_kDHEPSK, NID_kx_dhe_psk},
101 {SSL_kRSAPSK, NID_kx_rsa_psk},
102 {SSL_kPSK, NID_kx_psk},
103 {SSL_kSRP, NID_kx_srp},
104 {SSL_kGOST, NID_kx_gost},
105 {SSL_kGOST18, NID_kx_gost18},
106 {SSL_kANY, NID_kx_any}
109 static const ssl_cipher_table ssl_cipher_table_auth[] = {
110 {SSL_aRSA, NID_auth_rsa},
111 {SSL_aECDSA, NID_auth_ecdsa},
112 {SSL_aPSK, NID_auth_psk},
113 {SSL_aDSS, NID_auth_dss},
114 {SSL_aGOST01, NID_auth_gost01},
115 {SSL_aGOST12, NID_auth_gost12},
116 {SSL_aSRP, NID_auth_srp},
117 {SSL_aNULL, NID_auth_null},
118 {SSL_aANY, NID_auth_any}
122 /* Utility function for table lookup */
123 static int ssl_cipher_info_find(const ssl_cipher_table * table,
124 size_t table_cnt, uint32_t mask)
127 for (i = 0; i < table_cnt; i++, table++) {
128 if (table->mask == mask)
134 #define ssl_cipher_info_lookup(table, x) \
135 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
138 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
139 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
142 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
143 /* MD5, SHA, GOST94, MAC89 */
144 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
145 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
146 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
149 /* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */
150 NID_undef, NID_undef, NID_undef, NID_undef, NID_undef
154 #define CIPHER_KILL 2
157 #define CIPHER_SPECIAL 5
159 * Bump the ciphers to the top of the list.
160 * This rule isn't currently supported by the public cipherstring API.
162 #define CIPHER_BUMP 6
164 typedef struct cipher_order_st {
165 const SSL_CIPHER *cipher;
168 struct cipher_order_st *next, *prev;
171 static const SSL_CIPHER cipher_aliases[] = {
172 /* "ALL" doesn't include eNULL (must be specifically enabled) */
173 {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
174 /* "COMPLEMENTOFALL" */
175 {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
178 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
181 {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
184 * key exchange aliases (some of those using only a single bit here
185 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
186 * combines DHE_DSS and DHE_RSA)
188 {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
190 {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
191 {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
192 {0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
194 {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
195 {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
196 {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
198 {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
199 {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
200 {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
201 {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
202 {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
203 {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
204 {0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18},
206 /* server authentication aliases */
207 {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
208 {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
209 {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
210 {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
211 {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
212 {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
213 {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
214 {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
215 {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
216 {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
217 {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
219 /* aliases combining key exchange and server authentication */
220 {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
221 {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
222 {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
223 {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
224 {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
225 {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
226 {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
227 {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
228 {0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
229 {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
231 /* symmetric encryption aliases */
232 {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
233 {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
234 {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
235 {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
236 {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
237 {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
238 {0, SSL_TXT_GOST, NULL, 0, 0, 0,
239 SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK},
240 {0, SSL_TXT_AES128, NULL, 0, 0, 0,
241 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
242 {0, SSL_TXT_AES256, NULL, 0, 0, 0,
243 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
244 {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
245 {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
246 {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
247 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
248 {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
249 {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
250 {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
251 {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
252 {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
253 {0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12},
255 {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
256 {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
257 {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
258 {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
259 {0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC},
262 {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
263 {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
264 {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
265 {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
266 {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
267 {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
268 {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
269 {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
271 /* protocol version aliases */
272 {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
273 {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
274 {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
275 {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
277 /* strength classes */
278 {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
279 {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
280 {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
281 /* FIPS 140-2 approved ciphersuite */
282 {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
284 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
285 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
286 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
287 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
288 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
293 * Search for public key algorithm with given name and return its pkey_id if
294 * it is available. Otherwise return 0
296 #ifdef OPENSSL_NO_ENGINE
298 static int get_optional_pkey_id(const char *pkey_name)
300 const EVP_PKEY_ASN1_METHOD *ameth;
302 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
303 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
311 static int get_optional_pkey_id(const char *pkey_name)
313 const EVP_PKEY_ASN1_METHOD *ameth;
314 ENGINE *tmpeng = NULL;
316 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
318 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
322 ENGINE_finish(tmpeng);
328 /* masks of disabled algorithms */
329 static uint32_t disabled_enc_mask;
330 static uint32_t disabled_mac_mask;
331 static uint32_t disabled_mkey_mask;
332 static uint32_t disabled_auth_mask;
334 int ssl_load_ciphers(SSL_CTX *ctx)
337 const ssl_cipher_table *t;
339 disabled_enc_mask = 0;
340 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
341 if (t->nid != NID_undef) {
342 const EVP_CIPHER *cipher
343 = ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq);
345 ctx->ssl_cipher_methods[i] = cipher;
347 disabled_enc_mask |= t->mask;
350 disabled_mac_mask = 0;
351 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
353 = ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq);
355 ctx->ssl_digest_methods[i] = md;
357 disabled_mac_mask |= t->mask;
359 int tmpsize = EVP_MD_size(md);
360 if (!ossl_assert(tmpsize >= 0))
362 ctx->ssl_mac_secret_size[i] = tmpsize;
366 disabled_mkey_mask = 0;
367 disabled_auth_mask = 0;
369 #ifdef OPENSSL_NO_RSA
370 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
371 disabled_auth_mask |= SSL_aRSA;
373 #ifdef OPENSSL_NO_DSA
374 disabled_auth_mask |= SSL_aDSS;
377 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
380 disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
381 disabled_auth_mask |= SSL_aECDSA;
383 #ifdef OPENSSL_NO_PSK
384 disabled_mkey_mask |= SSL_PSK;
385 disabled_auth_mask |= SSL_aPSK;
387 #ifdef OPENSSL_NO_SRP
388 disabled_mkey_mask |= SSL_kSRP;
392 * Check for presence of GOST 34.10 algorithms, and if they are not
393 * present, disable appropriate auth and key exchange
395 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id(SN_id_Gost28147_89_MAC);
396 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
397 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
399 disabled_mac_mask |= SSL_GOST89MAC;
401 ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
402 get_optional_pkey_id(SN_gost_mac_12);
403 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
404 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
406 disabled_mac_mask |= SSL_GOST89MAC12;
408 ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] =
409 get_optional_pkey_id(SN_magma_mac);
410 if (ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX])
411 ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32;
413 disabled_mac_mask |= SSL_MAGMAOMAC;
415 ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] =
416 get_optional_pkey_id(SN_kuznyechik_mac);
417 if (ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX])
418 ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32;
420 disabled_mac_mask |= SSL_KUZNYECHIKOMAC;
422 if (!get_optional_pkey_id(SN_id_GostR3410_2001))
423 disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
424 if (!get_optional_pkey_id(SN_id_GostR3410_2012_256))
425 disabled_auth_mask |= SSL_aGOST12;
426 if (!get_optional_pkey_id(SN_id_GostR3410_2012_512))
427 disabled_auth_mask |= SSL_aGOST12;
429 * Disable GOST key exchange if no GOST signature algs are available *
431 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
432 (SSL_aGOST01 | SSL_aGOST12))
433 disabled_mkey_mask |= SSL_kGOST;
435 if ((disabled_auth_mask & SSL_aGOST12) == SSL_aGOST12)
436 disabled_mkey_mask |= SSL_kGOST18;
441 #ifndef OPENSSL_NO_COMP
443 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
445 return ((*a)->id - (*b)->id);
448 DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
450 SSL_COMP *comp = NULL;
451 COMP_METHOD *method = COMP_zlib();
453 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
455 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
456 comp = OPENSSL_malloc(sizeof(*comp));
458 comp->method = method;
459 comp->id = SSL_COMP_ZLIB_IDX;
460 comp->name = COMP_get_name(method);
461 sk_SSL_COMP_push(ssl_comp_methods, comp);
462 sk_SSL_COMP_sort(ssl_comp_methods);
468 static int load_builtin_compressions(void)
470 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
474 int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
475 const EVP_CIPHER **enc)
477 int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, sslc->algorithm_enc);
482 if (i == SSL_ENC_NULL_IDX) {
484 * We assume we don't care about this coming from an ENGINE so
485 * just do a normal EVP_CIPHER_fetch instead of
486 * ssl_evp_cipher_fetch()
488 *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
492 const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
495 || !ssl_evp_cipher_up_ref(cipher))
497 *enc = ctx->ssl_cipher_methods[i];
503 int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
504 const EVP_CIPHER **enc, const EVP_MD **md,
505 int *mac_pkey_type, size_t *mac_secret_size,
506 SSL_COMP **comp, int use_etm)
516 #ifndef OPENSSL_NO_COMP
517 if (!load_builtin_compressions()) {
519 * Currently don't care, since a failure only means that
520 * ssl_comp_methods is NULL, which is perfectly OK
525 ctmp.id = s->compress_meth;
526 if (ssl_comp_methods != NULL) {
527 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
528 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
530 /* If were only interested in comp then return success */
531 if ((enc == NULL) && (md == NULL))
535 if ((enc == NULL) || (md == NULL))
538 if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
541 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
544 if (mac_pkey_type != NULL)
545 *mac_pkey_type = NID_undef;
546 if (mac_secret_size != NULL)
547 *mac_secret_size = 0;
548 if (c->algorithm_mac == SSL_AEAD)
549 mac_pkey_type = NULL;
551 if (!ssl_evp_md_up_ref(ctx->ssl_digest_methods[i])) {
552 ssl_evp_cipher_free(*enc);
555 *md = ctx->ssl_digest_methods[i];
556 if (mac_pkey_type != NULL)
557 *mac_pkey_type = ssl_mac_pkey_id[i];
558 if (mac_secret_size != NULL)
559 *mac_secret_size = ctx->ssl_mac_secret_size[i];
562 if ((*enc != NULL) &&
563 (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
564 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
565 const EVP_CIPHER *evp = NULL;
568 || s->ssl_version >> 8 != TLS1_VERSION_MAJOR
569 || s->ssl_version < TLS1_VERSION)
572 if (c->algorithm_enc == SSL_RC4
573 && c->algorithm_mac == SSL_MD5)
574 evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
576 else if (c->algorithm_enc == SSL_AES128
577 && c->algorithm_mac == SSL_SHA1)
578 evp = ssl_evp_cipher_fetch(ctx->libctx,
579 NID_aes_128_cbc_hmac_sha1,
581 else if (c->algorithm_enc == SSL_AES256
582 && c->algorithm_mac == SSL_SHA1)
583 evp = ssl_evp_cipher_fetch(ctx->libctx,
584 NID_aes_256_cbc_hmac_sha1,
586 else if (c->algorithm_enc == SSL_AES128
587 && c->algorithm_mac == SSL_SHA256)
588 evp = ssl_evp_cipher_fetch(ctx->libctx,
589 NID_aes_128_cbc_hmac_sha256,
591 else if (c->algorithm_enc == SSL_AES256
592 && c->algorithm_mac == SSL_SHA256)
593 evp = ssl_evp_cipher_fetch(ctx->libctx,
594 NID_aes_256_cbc_hmac_sha256,
598 ssl_evp_cipher_free(*enc);
599 ssl_evp_md_free(*md);
609 const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
611 idx &= SSL_HANDSHAKE_MAC_MASK;
612 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
614 return ctx->ssl_digest_methods[idx];
617 const EVP_MD *ssl_handshake_md(SSL *s)
619 return ssl_md(s->ctx, ssl_get_algorithm2(s));
622 const EVP_MD *ssl_prf_md(SSL *s)
624 return ssl_md(s->ctx, ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
627 #define ITEM_SEP(a) \
628 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
630 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
637 if (curr->prev != NULL)
638 curr->prev->next = curr->next;
639 if (curr->next != NULL)
640 curr->next->prev = curr->prev;
641 (*tail)->next = curr;
647 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
654 if (curr->next != NULL)
655 curr->next->prev = curr->prev;
656 if (curr->prev != NULL)
657 curr->prev->next = curr->next;
658 (*head)->prev = curr;
664 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
666 uint32_t disabled_mkey,
667 uint32_t disabled_auth,
668 uint32_t disabled_enc,
669 uint32_t disabled_mac,
670 CIPHER_ORDER *co_list,
671 CIPHER_ORDER **head_p,
672 CIPHER_ORDER **tail_p)
678 * We have num_of_ciphers descriptions compiled in, depending on the
679 * method selected (SSLv3, TLSv1 etc).
680 * These will later be sorted in a linked list with at most num
684 /* Get the initial list of ciphers */
685 co_list_num = 0; /* actual count of ciphers */
686 for (i = 0; i < num_of_ciphers; i++) {
687 c = ssl_method->get_cipher(i);
688 /* drop those that use any of that is not available */
689 if (c == NULL || !c->valid)
691 if ((c->algorithm_mkey & disabled_mkey) ||
692 (c->algorithm_auth & disabled_auth) ||
693 (c->algorithm_enc & disabled_enc) ||
694 (c->algorithm_mac & disabled_mac))
696 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
699 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
703 co_list[co_list_num].cipher = c;
704 co_list[co_list_num].next = NULL;
705 co_list[co_list_num].prev = NULL;
706 co_list[co_list_num].active = 0;
711 * Prepare linked list from list entries
713 if (co_list_num > 0) {
714 co_list[0].prev = NULL;
716 if (co_list_num > 1) {
717 co_list[0].next = &co_list[1];
719 for (i = 1; i < co_list_num - 1; i++) {
720 co_list[i].prev = &co_list[i - 1];
721 co_list[i].next = &co_list[i + 1];
724 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
727 co_list[co_list_num - 1].next = NULL;
729 *head_p = &co_list[0];
730 *tail_p = &co_list[co_list_num - 1];
734 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
735 int num_of_group_aliases,
736 uint32_t disabled_mkey,
737 uint32_t disabled_auth,
738 uint32_t disabled_enc,
739 uint32_t disabled_mac,
742 CIPHER_ORDER *ciph_curr;
743 const SSL_CIPHER **ca_curr;
745 uint32_t mask_mkey = ~disabled_mkey;
746 uint32_t mask_auth = ~disabled_auth;
747 uint32_t mask_enc = ~disabled_enc;
748 uint32_t mask_mac = ~disabled_mac;
751 * First, add the real ciphers as already collected
755 while (ciph_curr != NULL) {
756 *ca_curr = ciph_curr->cipher;
758 ciph_curr = ciph_curr->next;
762 * Now we add the available ones from the cipher_aliases[] table.
763 * They represent either one or more algorithms, some of which
764 * in any affected category must be supported (set in enabled_mask),
765 * or represent a cipher strength value (will be added in any case because algorithms=0).
767 for (i = 0; i < num_of_group_aliases; i++) {
768 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
769 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
770 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
771 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
774 if ((algorithm_mkey & mask_mkey) == 0)
778 if ((algorithm_auth & mask_auth) == 0)
782 if ((algorithm_enc & mask_enc) == 0)
786 if ((algorithm_mac & mask_mac) == 0)
789 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
793 *ca_curr = NULL; /* end of list */
796 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
797 uint32_t alg_auth, uint32_t alg_enc,
798 uint32_t alg_mac, int min_tls,
799 uint32_t algo_strength, int rule,
800 int32_t strength_bits, CIPHER_ORDER **head_p,
801 CIPHER_ORDER **tail_p)
803 CIPHER_ORDER *head, *tail, *curr, *next, *last;
804 const SSL_CIPHER *cp;
807 OSSL_TRACE_BEGIN(TLS_CIPHER){
809 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
810 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
811 algo_strength, strength_bits);
814 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
815 reverse = 1; /* needed to maintain sorting between currently
839 next = reverse ? curr->prev : curr->next;
844 * Selection criteria is either the value of strength_bits
845 * or the algorithms used.
847 if (strength_bits >= 0) {
848 if (strength_bits != cp->strength_bits)
851 if (trc_out != NULL) {
854 "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
855 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
856 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
859 if (cipher_id != 0 && (cipher_id != cp->id))
861 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
863 if (alg_auth && !(alg_auth & cp->algorithm_auth))
865 if (alg_enc && !(alg_enc & cp->algorithm_enc))
867 if (alg_mac && !(alg_mac & cp->algorithm_mac))
869 if (min_tls && (min_tls != cp->min_tls))
871 if ((algo_strength & SSL_STRONG_MASK)
872 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
874 if ((algo_strength & SSL_DEFAULT_MASK)
875 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
880 BIO_printf(trc_out, "Action = %d\n", rule);
882 /* add the cipher if it has not been added yet. */
883 if (rule == CIPHER_ADD) {
886 ll_append_tail(&head, curr, &tail);
890 /* Move the added cipher to this location */
891 else if (rule == CIPHER_ORD) {
894 ll_append_tail(&head, curr, &tail);
896 } else if (rule == CIPHER_DEL) {
900 * most recently deleted ciphersuites get best positions for
901 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
902 * in reverse to maintain the order)
904 ll_append_head(&head, curr, &tail);
907 } else if (rule == CIPHER_BUMP) {
909 ll_append_head(&head, curr, &tail);
910 } else if (rule == CIPHER_KILL) {
915 curr->prev->next = curr->next;
919 if (curr->next != NULL)
920 curr->next->prev = curr->prev;
921 if (curr->prev != NULL)
922 curr->prev->next = curr->next;
931 OSSL_TRACE_END(TLS_CIPHER);
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 */
1073 * Now search for the cipher alias in the ca_list. Be careful
1074 * with the strncmp, because the "buflen" limitation
1075 * will make the rule "ADH:SOME" and the cipher
1076 * "ADH-MY-CIPHER" look like a match for buflen=3.
1077 * So additionally check whether the cipher name found
1078 * has the correct length. We can save a strlen() call:
1079 * just checking for the '\0' at the right place is
1080 * sufficient, we have to strncmp() anyway. (We cannot
1081 * use strcmp(), because buf is not '\0' terminated.)
1085 while (ca_list[j]) {
1086 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1087 && (ca_list[j]->name[buflen] == '\0')) {
1095 break; /* ignore this entry */
1097 if (ca_list[j]->algorithm_mkey) {
1099 alg_mkey &= ca_list[j]->algorithm_mkey;
1105 alg_mkey = ca_list[j]->algorithm_mkey;
1109 if (ca_list[j]->algorithm_auth) {
1111 alg_auth &= ca_list[j]->algorithm_auth;
1117 alg_auth = ca_list[j]->algorithm_auth;
1121 if (ca_list[j]->algorithm_enc) {
1123 alg_enc &= ca_list[j]->algorithm_enc;
1129 alg_enc = ca_list[j]->algorithm_enc;
1133 if (ca_list[j]->algorithm_mac) {
1135 alg_mac &= ca_list[j]->algorithm_mac;
1141 alg_mac = ca_list[j]->algorithm_mac;
1145 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1146 if (algo_strength & SSL_STRONG_MASK) {
1148 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1150 if (!(algo_strength & SSL_STRONG_MASK)) {
1155 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1159 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1160 if (algo_strength & SSL_DEFAULT_MASK) {
1162 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1164 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1170 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1174 if (ca_list[j]->valid) {
1176 * explicit ciphersuite found; its protocol version does not
1177 * become part of the search pattern!
1180 cipher_id = ca_list[j]->id;
1183 * not an explicit ciphersuite; only in this case, the
1184 * protocol version is considered part of the search pattern
1187 if (ca_list[j]->min_tls) {
1188 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1192 min_tls = ca_list[j]->min_tls;
1202 * Ok, we have the rule, now apply it
1204 if (rule == CIPHER_SPECIAL) { /* special command */
1206 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0) {
1207 ok = ssl_cipher_strength_sort(head_p, tail_p);
1208 } else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
1209 int level = buf[9] - '0';
1210 if (level < 0 || level > 5) {
1211 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1212 SSL_R_INVALID_COMMAND);
1214 c->sec_level = level;
1218 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1223 * We do not support any "multi" options
1224 * together with "@", so throw away the
1225 * rest of the command, if any left, until
1226 * end or ':' is found.
1228 while ((*l != '\0') && !ITEM_SEP(*l))
1231 ssl_cipher_apply_rule(cipher_id,
1232 alg_mkey, alg_auth, alg_enc, alg_mac,
1233 min_tls, algo_strength, rule, -1, head_p,
1236 while ((*l != '\0') && !ITEM_SEP(*l))
1246 #ifndef OPENSSL_NO_EC
1247 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1248 const char **prule_str)
1250 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1251 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1252 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1253 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1255 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1256 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1257 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1258 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1259 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1263 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1264 c->cert_flags |= suiteb_flags;
1266 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1271 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1273 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1274 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1275 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1278 # ifndef OPENSSL_NO_EC
1279 switch (suiteb_flags) {
1280 case SSL_CERT_FLAG_SUITEB_128_LOS:
1282 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1285 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1287 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1288 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1290 case SSL_CERT_FLAG_SUITEB_192_LOS:
1291 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1296 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1302 static int ciphersuite_cb(const char *elem, int len, void *arg)
1304 STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg;
1305 const SSL_CIPHER *cipher;
1306 /* Arbitrary sized temp buffer for the cipher name. Should be big enough */
1309 if (len > (int)(sizeof(name) - 1)) {
1310 SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH);
1314 memcpy(name, elem, len);
1317 cipher = ssl3_get_cipher_by_std_name(name);
1318 if (cipher == NULL) {
1319 SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH);
1323 if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
1324 SSLerr(SSL_F_CIPHERSUITE_CB, ERR_R_INTERNAL_ERROR);
1331 static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str)
1333 STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null();
1335 if (newciphers == NULL)
1338 /* Parse the list. We explicitly allow an empty list */
1340 && !CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers)) {
1341 sk_SSL_CIPHER_free(newciphers);
1344 sk_SSL_CIPHER_free(*currciphers);
1345 *currciphers = newciphers;
1350 static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1351 STACK_OF(SSL_CIPHER) *cipherstack)
1353 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1355 if (tmp_cipher_list == NULL) {
1359 sk_SSL_CIPHER_free(*cipher_list_by_id);
1360 *cipher_list_by_id = tmp_cipher_list;
1362 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1363 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1368 static int update_cipher_list(STACK_OF(SSL_CIPHER) **cipher_list,
1369 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1370 STACK_OF(SSL_CIPHER) *tls13_ciphersuites)
1373 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list);
1375 if (tmp_cipher_list == NULL)
1379 * Delete any existing TLSv1.3 ciphersuites. These are always first in the
1382 while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0
1383 && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls
1385 sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
1387 /* Insert the new TLSv1.3 ciphersuites */
1388 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++)
1389 sk_SSL_CIPHER_insert(tmp_cipher_list,
1390 sk_SSL_CIPHER_value(tls13_ciphersuites, i), i);
1392 if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list))
1395 sk_SSL_CIPHER_free(*cipher_list);
1396 *cipher_list = tmp_cipher_list;
1401 int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
1403 int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str);
1405 if (ret && ctx->cipher_list != NULL)
1406 return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id,
1407 ctx->tls13_ciphersuites);
1412 int SSL_set_ciphersuites(SSL *s, const char *str)
1414 STACK_OF(SSL_CIPHER) *cipher_list;
1415 int ret = set_ciphersuites(&(s->tls13_ciphersuites), str);
1417 if (s->cipher_list == NULL) {
1418 if ((cipher_list = SSL_get_ciphers(s)) != NULL)
1419 s->cipher_list = sk_SSL_CIPHER_dup(cipher_list);
1421 if (ret && s->cipher_list != NULL)
1422 return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id,
1423 s->tls13_ciphersuites);
1428 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1429 STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
1430 STACK_OF(SSL_CIPHER) **cipher_list,
1431 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1432 const char *rule_str,
1435 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i;
1436 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1437 STACK_OF(SSL_CIPHER) *cipherstack;
1439 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1440 const SSL_CIPHER **ca_list = NULL;
1443 * Return with error if nothing to do.
1445 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1447 #ifndef OPENSSL_NO_EC
1448 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1453 * To reduce the work to do we only want to process the compiled
1454 * in algorithms, so we first get the mask of disabled ciphers.
1457 disabled_mkey = disabled_mkey_mask;
1458 disabled_auth = disabled_auth_mask;
1459 disabled_enc = disabled_enc_mask;
1460 disabled_mac = disabled_mac_mask;
1463 * Now we have to collect the available ciphers from the compiled
1464 * in ciphers. We cannot get more than the number compiled in, so
1465 * it is used for allocation.
1467 num_of_ciphers = ssl_method->num_ciphers();
1469 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1470 if (co_list == NULL) {
1471 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1472 return NULL; /* Failure */
1475 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1476 disabled_mkey, disabled_auth, disabled_enc,
1477 disabled_mac, co_list, &head, &tail);
1479 /* Now arrange all ciphers by preference. */
1482 * Everything else being equal, prefer ephemeral ECDH over other key
1483 * exchange mechanisms.
1484 * For consistency, prefer ECDSA over RSA (though this only matters if the
1485 * server has both certificates, and is using the DEFAULT, or a client
1488 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1490 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1492 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1495 /* Within each strength group, we prefer GCM over CHACHA... */
1496 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1498 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1502 * ...and generally, our preferred cipher is AES.
1503 * Note that AEADs will be bumped to take preference after sorting by
1506 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1509 /* Temporarily enable everything else for sorting */
1510 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1512 /* Low priority for MD5 */
1513 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1517 * Move anonymous ciphers to the end. Usually, these will remain
1518 * disabled. (For applications that allow them, they aren't too bad, but
1519 * we prefer authenticated ciphers.)
1521 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1524 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1526 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1529 /* RC4 is sort-of broken -- move to the end */
1530 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1534 * Now sort by symmetric encryption strength. The above ordering remains
1535 * in force within each class
1537 if (!ssl_cipher_strength_sort(&head, &tail)) {
1538 OPENSSL_free(co_list);
1543 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1544 * TODO(openssl-team): is there an easier way to accomplish all this?
1546 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
1550 * Irrespective of strength, enforce the following order:
1551 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1552 * Within each group, ciphers remain sorted by strength and previous
1557 * 4) TLS 1.2 > legacy
1559 * Because we now bump ciphers to the top of the list, we proceed in
1560 * reverse order of preference.
1562 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1564 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
1565 CIPHER_BUMP, -1, &head, &tail);
1566 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
1567 CIPHER_BUMP, -1, &head, &tail);
1569 /* Now disable everything (maintaining the ordering!) */
1570 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1573 * We also need cipher aliases for selecting based on the rule_str.
1574 * There might be two types of entries in the rule_str: 1) names
1575 * of ciphers themselves 2) aliases for groups of ciphers.
1576 * For 1) we need the available ciphers and for 2) the cipher
1577 * groups of cipher_aliases added together in one list (otherwise
1578 * we would be happy with just the cipher_aliases table).
1580 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
1581 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1582 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
1583 if (ca_list == NULL) {
1584 OPENSSL_free(co_list);
1585 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1586 return NULL; /* Failure */
1588 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1589 disabled_mkey, disabled_auth, disabled_enc,
1590 disabled_mac, head);
1593 * If the rule_string begins with DEFAULT, apply the default rule
1594 * before using the (possibly available) additional rules.
1598 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1599 ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(),
1600 &head, &tail, ca_list, c);
1606 if (ok && (rule_p[0] != '\0'))
1607 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1609 OPENSSL_free(ca_list); /* Not needed anymore */
1611 if (!ok) { /* Rule processing failure */
1612 OPENSSL_free(co_list);
1617 * Allocate new "cipherstack" for the result, return with error
1618 * if we cannot get one.
1620 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1621 OPENSSL_free(co_list);
1625 /* Add TLSv1.3 ciphers first - we always prefer those if possible */
1626 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
1627 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
1629 /* Don't include any TLSv1.3 ciphers that are disabled */
1630 if ((sslc->algorithm_enc & disabled_enc) != 0
1631 || (ssl_cipher_table_mac[sslc->algorithm2
1632 & SSL_HANDSHAKE_MAC_MASK].mask
1633 & disabled_mac_mask) != 0)
1636 if (!sk_SSL_CIPHER_push(cipherstack, sslc)) {
1637 sk_SSL_CIPHER_free(cipherstack);
1642 OSSL_TRACE_BEGIN(TLS_CIPHER) {
1643 BIO_printf(trc_out, "cipher selection:\n");
1646 * The cipher selection for the list is done. The ciphers are added
1647 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1649 for (curr = head; curr != NULL; curr = curr->next) {
1651 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1652 OPENSSL_free(co_list);
1653 sk_SSL_CIPHER_free(cipherstack);
1654 OSSL_TRACE_CANCEL(TLS_CIPHER);
1657 if (trc_out != NULL)
1658 BIO_printf(trc_out, "<%s>\n", curr->cipher->name);
1661 OPENSSL_free(co_list); /* Not needed any longer */
1662 OSSL_TRACE_END(TLS_CIPHER);
1664 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) {
1665 sk_SSL_CIPHER_free(cipherstack);
1668 sk_SSL_CIPHER_free(*cipher_list);
1669 *cipher_list = cipherstack;
1674 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1677 const char *kx, *au, *enc, *mac;
1678 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1679 static const char *format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-9s Mac=%-4s\n";
1683 if ((buf = OPENSSL_malloc(len)) == NULL) {
1684 SSLerr(SSL_F_SSL_CIPHER_DESCRIPTION, ERR_R_MALLOC_FAILURE);
1687 } else if (len < 128) {
1691 alg_mkey = cipher->algorithm_mkey;
1692 alg_auth = cipher->algorithm_auth;
1693 alg_enc = cipher->algorithm_enc;
1694 alg_mac = cipher->algorithm_mac;
1696 ver = ssl_protocol_to_string(cipher->min_tls);
1758 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1759 case (SSL_aGOST12 | SSL_aGOST01):
1796 enc = "AESGCM(128)";
1799 enc = "AESGCM(256)";
1802 enc = "AESCCM(128)";
1805 enc = "AESCCM(256)";
1807 case SSL_AES128CCM8:
1808 enc = "AESCCM8(128)";
1810 case SSL_AES256CCM8:
1811 enc = "AESCCM8(256)";
1813 case SSL_CAMELLIA128:
1814 enc = "Camellia(128)";
1816 case SSL_CAMELLIA256:
1817 enc = "Camellia(256)";
1819 case SSL_ARIA128GCM:
1820 enc = "ARIAGCM(128)";
1822 case SSL_ARIA256GCM:
1823 enc = "ARIAGCM(256)";
1828 case SSL_eGOST2814789CNT:
1829 case SSL_eGOST2814789CNT12:
1830 enc = "GOST89(256)";
1835 case SSL_KUZNYECHIK:
1838 case SSL_CHACHA20POLY1305:
1839 enc = "CHACHA20/POLY1305(256)";
1863 case SSL_GOST89MAC12:
1869 case SSL_GOST12_256:
1870 case SSL_GOST12_512:
1878 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1883 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1889 * Backwards-compatibility crutch. In almost all contexts we report TLS
1890 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1892 if (c->min_tls == TLS1_VERSION)
1894 return ssl_protocol_to_string(c->min_tls);
1897 /* return the actual cipher being used */
1898 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1905 /* return the actual cipher being used in RFC standard name */
1906 const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
1913 /* return the OpenSSL name based on given RFC standard name */
1914 const char *OPENSSL_cipher_name(const char *stdname)
1916 const SSL_CIPHER *c;
1918 if (stdname == NULL)
1920 c = ssl3_get_cipher_by_std_name(stdname);
1921 return SSL_CIPHER_get_name(c);
1924 /* number of bits for symmetric cipher */
1925 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1930 if (alg_bits != NULL)
1931 *alg_bits = (int)c->alg_bits;
1932 ret = (int)c->strength_bits;
1937 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1942 uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c)
1944 return c->id & 0xFFFF;
1947 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1952 if ((n == 0) || (sk == NULL))
1954 nn = sk_SSL_COMP_num(sk);
1955 for (i = 0; i < nn; i++) {
1956 ctmp = sk_SSL_COMP_value(sk, i);
1963 #ifdef OPENSSL_NO_COMP
1964 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1969 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1975 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1981 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1983 load_builtin_compressions();
1984 return ssl_comp_methods;
1987 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1990 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1991 ssl_comp_methods = meths;
1995 static void cmeth_free(SSL_COMP *cm)
2000 void ssl_comp_free_compression_methods_int(void)
2002 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
2003 ssl_comp_methods = NULL;
2004 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
2007 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
2011 if (cm == NULL || COMP_get_type(cm) == NID_undef)
2015 * According to draft-ietf-tls-compression-04.txt, the
2016 * compression number ranges should be the following:
2018 * 0 to 63: methods defined by the IETF
2019 * 64 to 192: external party methods assigned by IANA
2020 * 193 to 255: reserved for private use
2022 if (id < 193 || id > 255) {
2023 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
2024 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
2028 comp = OPENSSL_malloc(sizeof(*comp));
2030 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
2036 load_builtin_compressions();
2037 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
2039 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
2040 SSL_R_DUPLICATE_COMPRESSION_ID);
2043 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
2045 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
2052 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2054 #ifndef OPENSSL_NO_COMP
2055 return comp ? COMP_get_name(comp) : NULL;
2061 const char *SSL_COMP_get0_name(const SSL_COMP *comp)
2063 #ifndef OPENSSL_NO_COMP
2070 int SSL_COMP_get_id(const SSL_COMP *comp)
2072 #ifndef OPENSSL_NO_COMP
2079 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr,
2082 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
2084 if (c == NULL || (!all && c->valid == 0))
2089 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2091 return ssl->method->get_cipher_by_char(ptr);
2094 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
2099 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
2102 return ssl_cipher_table_cipher[i].nid;
2105 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
2107 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
2111 return ssl_cipher_table_mac[i].nid;
2114 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
2116 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
2120 return ssl_cipher_table_kx[i].nid;
2123 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
2125 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
2129 return ssl_cipher_table_auth[i].nid;
2132 const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
2134 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
2136 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
2138 return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid);
2141 int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
2143 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
2146 int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
2147 size_t *int_overhead, size_t *blocksize,
2148 size_t *ext_overhead)
2150 size_t mac = 0, in = 0, blk = 0, out = 0;
2152 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
2153 * because there are no handy #defines for those. */
2154 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
2155 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
2156 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
2157 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
2158 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
2159 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
2160 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
2162 } else if (c->algorithm_mac & SSL_AEAD) {
2163 /* We're supposed to have handled all the AEAD modes above */
2166 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
2167 int digest_nid = SSL_CIPHER_get_digest_nid(c);
2168 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
2173 mac = EVP_MD_size(e_md);
2174 if (c->algorithm_enc != SSL_eNULL) {
2175 int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
2176 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
2178 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
2179 known CBC cipher. */
2180 if (e_ciph == NULL ||
2181 EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE)
2184 in = 1; /* padding length byte */
2185 out = EVP_CIPHER_iv_length(e_ciph);
2186 blk = EVP_CIPHER_block_size(e_ciph);
2190 *mac_overhead = mac;
2193 *ext_overhead = out;
2198 int ssl_cert_is_disabled(size_t idx)
2200 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
2202 if (cl == NULL || (cl->amask & disabled_auth_mask) != 0)
2208 * Default list of TLSv1.2 (and earlier) ciphers
2209 * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0
2210 * Update both macro and function simultaneously
2212 const char *OSSL_default_cipher_list(void)
2214 return "ALL:!COMPLEMENTOFDEFAULT:!eNULL";
2218 * Default list of TLSv1.3 (and later) ciphers
2219 * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0
2220 * Update both macro and function simultaneously
2222 const char *OSSL_default_ciphersuites(void)
2224 return "TLS_AES_256_GCM_SHA384:"
2225 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
2226 "TLS_CHACHA20_POLY1305_SHA256:"
2228 "TLS_AES_128_GCM_SHA256";