source: EcnlProtoTool/trunk/openssl-1.1.0e/ssl/ssl_ciph.c@ 331

Last change on this file since 331 was 331, checked in by coas-nagasima, 6 years ago

prototoolに関連するプロジェクトをnewlibからmuslを使うよう変更・更新
ntshellをnewlibの下位の実装から、muslのsyscallの実装に変更・更新
以下のOSSをアップデート
・mruby-1.3.0
・musl-1.1.18
・onigmo-6.1.3
・tcc-0.9.27
以下のOSSを追加
・openssl-1.1.0e
・curl-7.57.0
・zlib-1.2.11
以下のmrbgemsを追加
・iij/mruby-digest
・iij/mruby-env
・iij/mruby-errno
・iij/mruby-iijson
・iij/mruby-ipaddr
・iij/mruby-mock
・iij/mruby-require
・iij/mruby-tls-openssl
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc
File size: 60.4 KB
Line 
1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
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.
14 */
15/* ====================================================================
16 * Copyright 2005 Nokia. All rights reserved.
17 *
18 * The portions of the attached software ("Contribution") is developed by
19 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
20 * license.
21 *
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.
25 *
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.
29 *
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.
34 *
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
39 * OTHERWISE.
40 */
41
42#include <stdio.h>
43#include <ctype.h>
44#include <openssl/objects.h>
45#include <openssl/comp.h>
46#include <openssl/engine.h>
47#include <openssl/crypto.h>
48#include "ssl_locl.h"
49#include "internal/thread_once.h"
50
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
72
73/* NB: make sure indices in these tables match values above */
74
75typedef struct {
76 uint32_t mask;
77 int nid;
78} ssl_cipher_table;
79
80/* Table of NIDs for each cipher */
81static 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},
102};
103
104static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
105 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
106 NULL, NULL
107};
108
109#define SSL_COMP_NULL_IDX 0
110#define SSL_COMP_ZLIB_IDX 1
111#define SSL_COMP_NUM_IDX 2
112
113static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
114
115#ifndef OPENSSL_NO_COMP
116static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
117#endif
118
119/*
120 * Constant SSL_MAX_DIGEST equal to size of digests array should be defined
121 * in the ssl_locl.h
122 */
123
124#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
125
126/* NB: make sure indices in this table matches values above */
127static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
128 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
129 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
130 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
131 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
132 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
133 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
134 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
135 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
136 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
137 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
138 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
139 {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */
140};
141
142static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
143 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
144};
145
146/* *INDENT-OFF* */
147static const ssl_cipher_table ssl_cipher_table_kx[] = {
148 {SSL_kRSA, NID_kx_rsa},
149 {SSL_kECDHE, NID_kx_ecdhe},
150 {SSL_kDHE, NID_kx_dhe},
151 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
152 {SSL_kDHEPSK, NID_kx_dhe_psk},
153 {SSL_kRSAPSK, NID_kx_rsa_psk},
154 {SSL_kPSK, NID_kx_psk},
155 {SSL_kSRP, NID_kx_srp},
156 {SSL_kGOST, NID_kx_gost}
157};
158
159static const ssl_cipher_table ssl_cipher_table_auth[] = {
160 {SSL_aRSA, NID_auth_rsa},
161 {SSL_aECDSA, NID_auth_ecdsa},
162 {SSL_aPSK, NID_auth_psk},
163 {SSL_aDSS, NID_auth_dss},
164 {SSL_aGOST01, NID_auth_gost01},
165 {SSL_aGOST12, NID_auth_gost12},
166 {SSL_aSRP, NID_auth_srp},
167 {SSL_aNULL, NID_auth_null}
168};
169/* *INDENT-ON* */
170
171/* Utility function for table lookup */
172static int ssl_cipher_info_find(const ssl_cipher_table * table,
173 size_t table_cnt, uint32_t mask)
174{
175 size_t i;
176 for (i = 0; i < table_cnt; i++, table++) {
177 if (table->mask == mask)
178 return i;
179 }
180 return -1;
181}
182
183#define ssl_cipher_info_lookup(table, x) \
184 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
185
186/*
187 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
188 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
189 * found
190 */
191static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
192 /* MD5, SHA, GOST94, MAC89 */
193 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
194 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
195 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
196 /* GOST2012_512 */
197 EVP_PKEY_HMAC,
198};
199
200static int ssl_mac_secret_size[SSL_MD_NUM_IDX];
201
202#define CIPHER_ADD 1
203#define CIPHER_KILL 2
204#define CIPHER_DEL 3
205#define CIPHER_ORD 4
206#define CIPHER_SPECIAL 5
207/*
208 * Bump the ciphers to the top of the list.
209 * This rule isn't currently supported by the public cipherstring API.
210 */
211#define CIPHER_BUMP 6
212
213typedef struct cipher_order_st {
214 const SSL_CIPHER *cipher;
215 int active;
216 int dead;
217 struct cipher_order_st *next, *prev;
218} CIPHER_ORDER;
219
220static const SSL_CIPHER cipher_aliases[] = {
221 /* "ALL" doesn't include eNULL (must be specifically enabled) */
222 {0, SSL_TXT_ALL, 0, 0, 0, ~SSL_eNULL},
223 /* "COMPLEMENTOFALL" */
224 {0, SSL_TXT_CMPALL, 0, 0, 0, SSL_eNULL},
225
226 /*
227 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
228 * ALL!)
229 */
230 {0, SSL_TXT_CMPDEF, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
231
232 /*
233 * key exchange aliases (some of those using only a single bit here
234 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
235 * combines DHE_DSS and DHE_RSA)
236 */
237 {0, SSL_TXT_kRSA, 0, SSL_kRSA},
238
239 {0, SSL_TXT_kEDH, 0, SSL_kDHE},
240 {0, SSL_TXT_kDHE, 0, SSL_kDHE},
241 {0, SSL_TXT_DH, 0, SSL_kDHE},
242
243 {0, SSL_TXT_kEECDH, 0, SSL_kECDHE},
244 {0, SSL_TXT_kECDHE, 0, SSL_kECDHE},
245 {0, SSL_TXT_ECDH, 0, SSL_kECDHE},
246
247 {0, SSL_TXT_kPSK, 0, SSL_kPSK},
248 {0, SSL_TXT_kRSAPSK, 0, SSL_kRSAPSK},
249 {0, SSL_TXT_kECDHEPSK, 0, SSL_kECDHEPSK},
250 {0, SSL_TXT_kDHEPSK, 0, SSL_kDHEPSK},
251 {0, SSL_TXT_kSRP, 0, SSL_kSRP},
252 {0, SSL_TXT_kGOST, 0, SSL_kGOST},
253
254 /* server authentication aliases */
255 {0, SSL_TXT_aRSA, 0, 0, SSL_aRSA},
256 {0, SSL_TXT_aDSS, 0, 0, SSL_aDSS},
257 {0, SSL_TXT_DSS, 0, 0, SSL_aDSS},
258 {0, SSL_TXT_aNULL, 0, 0, SSL_aNULL},
259 {0, SSL_TXT_aECDSA, 0, 0, SSL_aECDSA},
260 {0, SSL_TXT_ECDSA, 0, 0, SSL_aECDSA},
261 {0, SSL_TXT_aPSK, 0, 0, SSL_aPSK},
262 {0, SSL_TXT_aGOST01, 0, 0, SSL_aGOST01},
263 {0, SSL_TXT_aGOST12, 0, 0, SSL_aGOST12},
264 {0, SSL_TXT_aGOST, 0, 0, SSL_aGOST01 | SSL_aGOST12},
265 {0, SSL_TXT_aSRP, 0, 0, SSL_aSRP},
266
267 /* aliases combining key exchange and server authentication */
268 {0, SSL_TXT_EDH, 0, SSL_kDHE, ~SSL_aNULL},
269 {0, SSL_TXT_DHE, 0, SSL_kDHE, ~SSL_aNULL},
270 {0, SSL_TXT_EECDH, 0, SSL_kECDHE, ~SSL_aNULL},
271 {0, SSL_TXT_ECDHE, 0, SSL_kECDHE, ~SSL_aNULL},
272 {0, SSL_TXT_NULL, 0, 0, 0, SSL_eNULL},
273 {0, SSL_TXT_RSA, 0, SSL_kRSA, SSL_aRSA},
274 {0, SSL_TXT_ADH, 0, SSL_kDHE, SSL_aNULL},
275 {0, SSL_TXT_AECDH, 0, SSL_kECDHE, SSL_aNULL},
276 {0, SSL_TXT_PSK, 0, SSL_PSK},
277 {0, SSL_TXT_SRP, 0, SSL_kSRP},
278
279 /* symmetric encryption aliases */
280 {0, SSL_TXT_3DES, 0, 0, 0, SSL_3DES},
281 {0, SSL_TXT_RC4, 0, 0, 0, SSL_RC4},
282 {0, SSL_TXT_RC2, 0, 0, 0, SSL_RC2},
283 {0, SSL_TXT_IDEA, 0, 0, 0, SSL_IDEA},
284 {0, SSL_TXT_SEED, 0, 0, 0, SSL_SEED},
285 {0, SSL_TXT_eNULL, 0, 0, 0, SSL_eNULL},
286 {0, SSL_TXT_GOST, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12},
287 {0, SSL_TXT_AES128, 0, 0, 0,
288 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
289 {0, SSL_TXT_AES256, 0, 0, 0,
290 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
291 {0, SSL_TXT_AES, 0, 0, 0, SSL_AES},
292 {0, SSL_TXT_AES_GCM, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
293 {0, SSL_TXT_AES_CCM, 0, 0, 0,
294 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
295 {0, SSL_TXT_AES_CCM_8, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
296 {0, SSL_TXT_CAMELLIA128, 0, 0, 0, SSL_CAMELLIA128},
297 {0, SSL_TXT_CAMELLIA256, 0, 0, 0, SSL_CAMELLIA256},
298 {0, SSL_TXT_CAMELLIA, 0, 0, 0, SSL_CAMELLIA},
299 {0, SSL_TXT_CHACHA20, 0, 0, 0, SSL_CHACHA20},
300
301 /* MAC aliases */
302 {0, SSL_TXT_MD5, 0, 0, 0, 0, SSL_MD5},
303 {0, SSL_TXT_SHA1, 0, 0, 0, 0, SSL_SHA1},
304 {0, SSL_TXT_SHA, 0, 0, 0, 0, SSL_SHA1},
305 {0, SSL_TXT_GOST94, 0, 0, 0, 0, SSL_GOST94},
306 {0, SSL_TXT_GOST89MAC, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
307 {0, SSL_TXT_SHA256, 0, 0, 0, 0, SSL_SHA256},
308 {0, SSL_TXT_SHA384, 0, 0, 0, 0, SSL_SHA384},
309 {0, SSL_TXT_GOST12, 0, 0, 0, 0, SSL_GOST12_256},
310
311 /* protocol version aliases */
312 {0, SSL_TXT_SSLV3, 0, 0, 0, 0, 0, SSL3_VERSION},
313 {0, SSL_TXT_TLSV1, 0, 0, 0, 0, 0, TLS1_VERSION},
314 {0, "TLSv1.0", 0, 0, 0, 0, 0, TLS1_VERSION},
315 {0, SSL_TXT_TLSV1_2, 0, 0, 0, 0, 0, TLS1_2_VERSION},
316
317 /* strength classes */
318 {0, SSL_TXT_LOW, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
319 {0, SSL_TXT_MEDIUM, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
320 {0, SSL_TXT_HIGH, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
321 /* FIPS 140-2 approved ciphersuite */
322 {0, SSL_TXT_FIPS, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
323
324 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
325 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, 0,
326 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
327 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, 0,
328 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
329
330};
331
332/*
333 * Search for public key algorithm with given name and return its pkey_id if
334 * it is available. Otherwise return 0
335 */
336#ifdef OPENSSL_NO_ENGINE
337
338static int get_optional_pkey_id(const char *pkey_name)
339{
340 const EVP_PKEY_ASN1_METHOD *ameth;
341 int pkey_id = 0;
342 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
343 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
344 ameth) > 0) {
345 return pkey_id;
346 }
347 return 0;
348}
349
350#else
351
352static int get_optional_pkey_id(const char *pkey_name)
353{
354 const EVP_PKEY_ASN1_METHOD *ameth;
355 ENGINE *tmpeng = NULL;
356 int pkey_id = 0;
357 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
358 if (ameth) {
359 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
360 ameth) <= 0)
361 pkey_id = 0;
362 }
363 ENGINE_finish(tmpeng);
364 return pkey_id;
365}
366
367#endif
368
369/* masks of disabled algorithms */
370static uint32_t disabled_enc_mask;
371static uint32_t disabled_mac_mask;
372static uint32_t disabled_mkey_mask;
373static uint32_t disabled_auth_mask;
374
375void ssl_load_ciphers(void)
376{
377 size_t i;
378 const ssl_cipher_table *t;
379
380 disabled_enc_mask = 0;
381 ssl_sort_cipher_list();
382 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
383 if (t->nid == NID_undef) {
384 ssl_cipher_methods[i] = NULL;
385 } else {
386 const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid);
387 ssl_cipher_methods[i] = cipher;
388 if (cipher == NULL)
389 disabled_enc_mask |= t->mask;
390 }
391 }
392#ifdef SSL_FORBID_ENULL
393 disabled_enc_mask |= SSL_eNULL;
394#endif
395 disabled_mac_mask = 0;
396 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
397 const EVP_MD *md = EVP_get_digestbynid(t->nid);
398 ssl_digest_methods[i] = md;
399 if (md == NULL) {
400 disabled_mac_mask |= t->mask;
401 } else {
402 ssl_mac_secret_size[i] = EVP_MD_size(md);
403 OPENSSL_assert(ssl_mac_secret_size[i] >= 0);
404 }
405 }
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);
409
410 disabled_mkey_mask = 0;
411 disabled_auth_mask = 0;
412
413#ifdef OPENSSL_NO_RSA
414 disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK;
415 disabled_auth_mask |= SSL_aRSA;
416#endif
417#ifdef OPENSSL_NO_DSA
418 disabled_auth_mask |= SSL_aDSS;
419#endif
420#ifdef OPENSSL_NO_DH
421 disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
422#endif
423#ifdef OPENSSL_NO_EC
424 disabled_mkey_mask |= SSL_kECDHEPSK;
425 disabled_auth_mask |= SSL_aECDSA;
426#endif
427#ifdef OPENSSL_NO_PSK
428 disabled_mkey_mask |= SSL_PSK;
429 disabled_auth_mask |= SSL_aPSK;
430#endif
431#ifdef OPENSSL_NO_SRP
432 disabled_mkey_mask |= SSL_kSRP;
433#endif
434
435 /*
436 * Check for presence of GOST 34.10 algorithms, and if they are not
437 * present, disable appropriate auth and key exchange
438 */
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;
442 } else {
443 disabled_mac_mask |= SSL_GOST89MAC;
444 }
445
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;
450 } else {
451 disabled_mac_mask |= SSL_GOST89MAC12;
452 }
453
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;
460 /*
461 * Disable GOST key exchange if no GOST signature algs are available *
462 */
463 if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
464 (SSL_aGOST01 | SSL_aGOST12))
465 disabled_mkey_mask |= SSL_kGOST;
466}
467
468#ifndef OPENSSL_NO_COMP
469
470static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
471{
472 return ((*a)->id - (*b)->id);
473}
474
475DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
476{
477 SSL_COMP *comp = NULL;
478 COMP_METHOD *method = COMP_zlib();
479
480 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
481 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
482
483 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
484 comp = OPENSSL_malloc(sizeof(*comp));
485 if (comp != NULL) {
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);
491 }
492 }
493 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
494 return 1;
495}
496
497static int load_builtin_compressions(void)
498{
499 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
500}
501#endif
502
503int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
504 const EVP_MD **md, int *mac_pkey_type,
505 int *mac_secret_size, SSL_COMP **comp, int use_etm)
506{
507 int i;
508 const SSL_CIPHER *c;
509
510 c = s->cipher;
511 if (c == NULL)
512 return (0);
513 if (comp != NULL) {
514 SSL_COMP ctmp;
515#ifndef OPENSSL_NO_COMP
516 if (!load_builtin_compressions()) {
517 /*
518 * Currently don't care, since a failure only means that
519 * ssl_comp_methods is NULL, which is perfectly OK
520 */
521 }
522#endif
523 *comp = NULL;
524 ctmp.id = s->compress_meth;
525 if (ssl_comp_methods != NULL) {
526 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
527 if (i >= 0)
528 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
529 else
530 *comp = NULL;
531 }
532 /* If were only interested in comp then return success */
533 if ((enc == NULL) && (md == NULL))
534 return 1;
535 }
536
537 if ((enc == NULL) || (md == NULL))
538 return 0;
539
540 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
541
542 if (i == -1)
543 *enc = NULL;
544 else {
545 if (i == SSL_ENC_NULL_IDX)
546 *enc = EVP_enc_null();
547 else
548 *enc = ssl_cipher_methods[i];
549 }
550
551 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
552 if (i == -1) {
553 *md = NULL;
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;
560 } else {
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];
566 }
567
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;
572
573 if (use_etm)
574 return 1;
575
576 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
577 s->ssl_version < TLS1_VERSION)
578 return 1;
579
580 if (FIPS_mode())
581 return 1;
582
583 if (c->algorithm_enc == SSL_RC4 &&
584 c->algorithm_mac == SSL_MD5 &&
585 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
586 *enc = evp, *md = NULL;
587 else if (c->algorithm_enc == SSL_AES128 &&
588 c->algorithm_mac == SSL_SHA1 &&
589 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
590 *enc = evp, *md = NULL;
591 else if (c->algorithm_enc == SSL_AES256 &&
592 c->algorithm_mac == SSL_SHA1 &&
593 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
594 *enc = evp, *md = NULL;
595 else if (c->algorithm_enc == SSL_AES128 &&
596 c->algorithm_mac == SSL_SHA256 &&
597 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256")))
598 *enc = evp, *md = NULL;
599 else if (c->algorithm_enc == SSL_AES256 &&
600 c->algorithm_mac == SSL_SHA256 &&
601 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256")))
602 *enc = evp, *md = NULL;
603 return (1);
604 } else
605 return (0);
606}
607
608const EVP_MD *ssl_md(int idx)
609{
610 idx &= SSL_HANDSHAKE_MAC_MASK;
611 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
612 return NULL;
613 return ssl_digest_methods[idx];
614}
615
616const EVP_MD *ssl_handshake_md(SSL *s)
617{
618 return ssl_md(ssl_get_algorithm2(s));
619}
620
621const EVP_MD *ssl_prf_md(SSL *s)
622{
623 return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
624}
625
626#define ITEM_SEP(a) \
627 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
628
629static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
630 CIPHER_ORDER **tail)
631{
632 if (curr == *tail)
633 return;
634 if (curr == *head)
635 *head = curr->next;
636 if (curr->prev != NULL)
637 curr->prev->next = curr->next;
638 if (curr->next != NULL)
639 curr->next->prev = curr->prev;
640 (*tail)->next = curr;
641 curr->prev = *tail;
642 curr->next = NULL;
643 *tail = curr;
644}
645
646static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
647 CIPHER_ORDER **tail)
648{
649 if (curr == *head)
650 return;
651 if (curr == *tail)
652 *tail = curr->prev;
653 if (curr->next != NULL)
654 curr->next->prev = curr->prev;
655 if (curr->prev != NULL)
656 curr->prev->next = curr->next;
657 (*head)->prev = curr;
658 curr->next = *head;
659 curr->prev = NULL;
660 *head = curr;
661}
662
663static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
664 int num_of_ciphers,
665 uint32_t disabled_mkey,
666 uint32_t disabled_auth,
667 uint32_t disabled_enc,
668 uint32_t disabled_mac,
669 CIPHER_ORDER *co_list,
670 CIPHER_ORDER **head_p,
671 CIPHER_ORDER **tail_p)
672{
673 int i, co_list_num;
674 const SSL_CIPHER *c;
675
676 /*
677 * We have num_of_ciphers descriptions compiled in, depending on the
678 * method selected (SSLv3, TLSv1 etc).
679 * These will later be sorted in a linked list with at most num
680 * entries.
681 */
682
683 /* Get the initial list of ciphers */
684 co_list_num = 0; /* actual count of ciphers */
685 for (i = 0; i < num_of_ciphers; i++) {
686 c = ssl_method->get_cipher(i);
687 /* drop those that use any of that is not available */
688 if (c == NULL || !c->valid)
689 continue;
690 if (FIPS_mode() && (c->algo_strength & SSL_FIPS))
691 continue;
692 if ((c->algorithm_mkey & disabled_mkey) ||
693 (c->algorithm_auth & disabled_auth) ||
694 (c->algorithm_enc & disabled_enc) ||
695 (c->algorithm_mac & disabled_mac))
696 continue;
697 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
698 c->min_tls == 0)
699 continue;
700 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
701 c->min_dtls == 0)
702 continue;
703
704 co_list[co_list_num].cipher = c;
705 co_list[co_list_num].next = NULL;
706 co_list[co_list_num].prev = NULL;
707 co_list[co_list_num].active = 0;
708 co_list_num++;
709 /*
710 * if (!sk_push(ca_list,(char *)c)) goto err;
711 */
712 }
713
714 /*
715 * Prepare linked list from list entries
716 */
717 if (co_list_num > 0) {
718 co_list[0].prev = NULL;
719
720 if (co_list_num > 1) {
721 co_list[0].next = &co_list[1];
722
723 for (i = 1; i < co_list_num - 1; i++) {
724 co_list[i].prev = &co_list[i - 1];
725 co_list[i].next = &co_list[i + 1];
726 }
727
728 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
729 }
730
731 co_list[co_list_num - 1].next = NULL;
732
733 *head_p = &co_list[0];
734 *tail_p = &co_list[co_list_num - 1];
735 }
736}
737
738static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
739 int num_of_group_aliases,
740 uint32_t disabled_mkey,
741 uint32_t disabled_auth,
742 uint32_t disabled_enc,
743 uint32_t disabled_mac,
744 CIPHER_ORDER *head)
745{
746 CIPHER_ORDER *ciph_curr;
747 const SSL_CIPHER **ca_curr;
748 int i;
749 uint32_t mask_mkey = ~disabled_mkey;
750 uint32_t mask_auth = ~disabled_auth;
751 uint32_t mask_enc = ~disabled_enc;
752 uint32_t mask_mac = ~disabled_mac;
753
754 /*
755 * First, add the real ciphers as already collected
756 */
757 ciph_curr = head;
758 ca_curr = ca_list;
759 while (ciph_curr != NULL) {
760 *ca_curr = ciph_curr->cipher;
761 ca_curr++;
762 ciph_curr = ciph_curr->next;
763 }
764
765 /*
766 * Now we add the available ones from the cipher_aliases[] table.
767 * They represent either one or more algorithms, some of which
768 * in any affected category must be supported (set in enabled_mask),
769 * or represent a cipher strength value (will be added in any case because algorithms=0).
770 */
771 for (i = 0; i < num_of_group_aliases; i++) {
772 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
773 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
774 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
775 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
776
777 if (algorithm_mkey)
778 if ((algorithm_mkey & mask_mkey) == 0)
779 continue;
780
781 if (algorithm_auth)
782 if ((algorithm_auth & mask_auth) == 0)
783 continue;
784
785 if (algorithm_enc)
786 if ((algorithm_enc & mask_enc) == 0)
787 continue;
788
789 if (algorithm_mac)
790 if ((algorithm_mac & mask_mac) == 0)
791 continue;
792
793 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
794 ca_curr++;
795 }
796
797 *ca_curr = NULL; /* end of list */
798}
799
800static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
801 uint32_t alg_auth, uint32_t alg_enc,
802 uint32_t alg_mac, int min_tls,
803 uint32_t algo_strength, int rule,
804 int32_t strength_bits, CIPHER_ORDER **head_p,
805 CIPHER_ORDER **tail_p)
806{
807 CIPHER_ORDER *head, *tail, *curr, *next, *last;
808 const SSL_CIPHER *cp;
809 int reverse = 0;
810
811#ifdef CIPHER_DEBUG
812 fprintf(stderr,
813 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
814 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
815 algo_strength, strength_bits);
816#endif
817
818 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
819 reverse = 1; /* needed to maintain sorting between currently
820 * deleted ciphers */
821
822 head = *head_p;
823 tail = *tail_p;
824
825 if (reverse) {
826 next = tail;
827 last = head;
828 } else {
829 next = head;
830 last = tail;
831 }
832
833 curr = NULL;
834 for (;;) {
835 if (curr == last)
836 break;
837
838 curr = next;
839
840 if (curr == NULL)
841 break;
842
843 next = reverse ? curr->prev : curr->next;
844
845 cp = curr->cipher;
846
847 /*
848 * Selection criteria is either the value of strength_bits
849 * or the algorithms used.
850 */
851 if (strength_bits >= 0) {
852 if (strength_bits != cp->strength_bits)
853 continue;
854 } else {
855#ifdef CIPHER_DEBUG
856 fprintf(stderr,
857 "\nName: %s:\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
858 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
859 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
860 cp->algo_strength);
861#endif
862 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
863 continue;
864 if (alg_auth && !(alg_auth & cp->algorithm_auth))
865 continue;
866 if (alg_enc && !(alg_enc & cp->algorithm_enc))
867 continue;
868 if (alg_mac && !(alg_mac & cp->algorithm_mac))
869 continue;
870 if (min_tls && (min_tls != cp->min_tls))
871 continue;
872 if ((algo_strength & SSL_STRONG_MASK)
873 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
874 continue;
875 if ((algo_strength & SSL_DEFAULT_MASK)
876 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
877 continue;
878 }
879
880#ifdef CIPHER_DEBUG
881 fprintf(stderr, "Action = %d\n", rule);
882#endif
883
884 /* add the cipher if it has not been added yet. */
885 if (rule == CIPHER_ADD) {
886 /* reverse == 0 */
887 if (!curr->active) {
888 ll_append_tail(&head, curr, &tail);
889 curr->active = 1;
890 }
891 }
892 /* Move the added cipher to this location */
893 else if (rule == CIPHER_ORD) {
894 /* reverse == 0 */
895 if (curr->active) {
896 ll_append_tail(&head, curr, &tail);
897 }
898 } else if (rule == CIPHER_DEL) {
899 /* reverse == 1 */
900 if (curr->active) {
901 /*
902 * most recently deleted ciphersuites get best positions for
903 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
904 * in reverse to maintain the order)
905 */
906 ll_append_head(&head, curr, &tail);
907 curr->active = 0;
908 }
909 } else if (rule == CIPHER_BUMP) {
910 if (curr->active)
911 ll_append_head(&head, curr, &tail);
912 } else if (rule == CIPHER_KILL) {
913 /* reverse == 0 */
914 if (head == curr)
915 head = curr->next;
916 else
917 curr->prev->next = curr->next;
918 if (tail == curr)
919 tail = curr->prev;
920 curr->active = 0;
921 if (curr->next != NULL)
922 curr->next->prev = curr->prev;
923 if (curr->prev != NULL)
924 curr->prev->next = curr->next;
925 curr->next = NULL;
926 curr->prev = NULL;
927 }
928 }
929
930 *head_p = head;
931 *tail_p = tail;
932}
933
934static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
935 CIPHER_ORDER **tail_p)
936{
937 int32_t max_strength_bits;
938 int i, *number_uses;
939 CIPHER_ORDER *curr;
940
941 /*
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.
945 */
946 max_strength_bits = 0;
947 curr = *head_p;
948 while (curr != NULL) {
949 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
950 max_strength_bits = curr->cipher->strength_bits;
951 curr = curr->next;
952 }
953
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);
957 return (0);
958 }
959
960 /*
961 * Now find the strength_bits values actually used
962 */
963 curr = *head_p;
964 while (curr != NULL) {
965 if (curr->active)
966 number_uses[curr->cipher->strength_bits]++;
967 curr = curr->next;
968 }
969 /*
970 * Go through the list of used strength_bits values in descending
971 * order.
972 */
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,
976 tail_p);
977
978 OPENSSL_free(number_uses);
979 return (1);
980}
981
982static 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)
986{
987 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
988 int min_tls;
989 const char *l, *buf;
990 int j, multi, found, rule, retval, ok, buflen;
991 uint32_t cipher_id = 0;
992 char ch;
993
994 retval = 1;
995 l = rule_str;
996 for (;;) {
997 ch = *l;
998
999 if (ch == '\0')
1000 break; /* done */
1001 if (ch == '-') {
1002 rule = CIPHER_DEL;
1003 l++;
1004 } else if (ch == '+') {
1005 rule = CIPHER_ORD;
1006 l++;
1007 } else if (ch == '!') {
1008 rule = CIPHER_KILL;
1009 l++;
1010 } else if (ch == '@') {
1011 rule = CIPHER_SPECIAL;
1012 l++;
1013 } else {
1014 rule = CIPHER_ADD;
1015 }
1016
1017 if (ITEM_SEP(ch)) {
1018 l++;
1019 continue;
1020 }
1021
1022 alg_mkey = 0;
1023 alg_auth = 0;
1024 alg_enc = 0;
1025 alg_mac = 0;
1026 min_tls = 0;
1027 algo_strength = 0;
1028
1029 for (;;) {
1030 ch = *l;
1031 buf = l;
1032 buflen = 0;
1033#ifndef CHARSET_EBCDIC
1034 while (((ch >= 'A') && (ch <= 'Z')) ||
1035 ((ch >= '0') && (ch <= '9')) ||
1036 ((ch >= 'a') && (ch <= 'z')) ||
1037 (ch == '-') || (ch == '.') || (ch == '='))
1038#else
1039 while (isalnum(ch) || (ch == '-') || (ch == '.') || (ch == '='))
1040#endif
1041 {
1042 ch = *(++l);
1043 buflen++;
1044 }
1045
1046 if (buflen == 0) {
1047 /*
1048 * We hit something we cannot deal with,
1049 * it is no command or separator nor
1050 * alphanumeric, so we call this an error.
1051 */
1052 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1053 retval = found = 0;
1054 l++;
1055 break;
1056 }
1057
1058 if (rule == CIPHER_SPECIAL) {
1059 found = 0; /* unused -- avoid compiler warning */
1060 break; /* special treatment */
1061 }
1062
1063 /* check for multi-part specification */
1064 if (ch == '+') {
1065 multi = 1;
1066 l++;
1067 } else
1068 multi = 0;
1069
1070 /*
1071 * Now search for the cipher alias in the ca_list. Be careful
1072 * with the strncmp, because the "buflen" limitation
1073 * will make the rule "ADH:SOME" and the cipher
1074 * "ADH-MY-CIPHER" look like a match for buflen=3.
1075 * So additionally check whether the cipher name found
1076 * has the correct length. We can save a strlen() call:
1077 * just checking for the '\0' at the right place is
1078 * sufficient, we have to strncmp() anyway. (We cannot
1079 * use strcmp(), because buf is not '\0' terminated.)
1080 */
1081 j = found = 0;
1082 cipher_id = 0;
1083 while (ca_list[j]) {
1084 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1085 && (ca_list[j]->name[buflen] == '\0')) {
1086 found = 1;
1087 break;
1088 } else
1089 j++;
1090 }
1091
1092 if (!found)
1093 break; /* ignore this entry */
1094
1095 if (ca_list[j]->algorithm_mkey) {
1096 if (alg_mkey) {
1097 alg_mkey &= ca_list[j]->algorithm_mkey;
1098 if (!alg_mkey) {
1099 found = 0;
1100 break;
1101 }
1102 } else
1103 alg_mkey = ca_list[j]->algorithm_mkey;
1104 }
1105
1106 if (ca_list[j]->algorithm_auth) {
1107 if (alg_auth) {
1108 alg_auth &= ca_list[j]->algorithm_auth;
1109 if (!alg_auth) {
1110 found = 0;
1111 break;
1112 }
1113 } else
1114 alg_auth = ca_list[j]->algorithm_auth;
1115 }
1116
1117 if (ca_list[j]->algorithm_enc) {
1118 if (alg_enc) {
1119 alg_enc &= ca_list[j]->algorithm_enc;
1120 if (!alg_enc) {
1121 found = 0;
1122 break;
1123 }
1124 } else
1125 alg_enc = ca_list[j]->algorithm_enc;
1126 }
1127
1128 if (ca_list[j]->algorithm_mac) {
1129 if (alg_mac) {
1130 alg_mac &= ca_list[j]->algorithm_mac;
1131 if (!alg_mac) {
1132 found = 0;
1133 break;
1134 }
1135 } else
1136 alg_mac = ca_list[j]->algorithm_mac;
1137 }
1138
1139 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1140 if (algo_strength & SSL_STRONG_MASK) {
1141 algo_strength &=
1142 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1143 ~SSL_STRONG_MASK;
1144 if (!(algo_strength & SSL_STRONG_MASK)) {
1145 found = 0;
1146 break;
1147 }
1148 } else
1149 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1150 }
1151
1152 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1153 if (algo_strength & SSL_DEFAULT_MASK) {
1154 algo_strength &=
1155 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1156 ~SSL_DEFAULT_MASK;
1157 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1158 found = 0;
1159 break;
1160 }
1161 } else
1162 algo_strength |=
1163 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1164 }
1165
1166 if (ca_list[j]->valid) {
1167 /*
1168 * explicit ciphersuite found; its protocol version does not
1169 * become part of the search pattern!
1170 */
1171
1172 cipher_id = ca_list[j]->id;
1173 } else {
1174 /*
1175 * not an explicit ciphersuite; only in this case, the
1176 * protocol version is considered part of the search pattern
1177 */
1178
1179 if (ca_list[j]->min_tls) {
1180 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1181 found = 0;
1182 break;
1183 } else {
1184 min_tls = ca_list[j]->min_tls;
1185 }
1186 }
1187 }
1188
1189 if (!multi)
1190 break;
1191 }
1192
1193 /*
1194 * Ok, we have the rule, now apply it
1195 */
1196 if (rule == CIPHER_SPECIAL) { /* special command */
1197 ok = 0;
1198 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0)
1199 ok = ssl_cipher_strength_sort(head_p, tail_p);
1200 else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
1201 int level = buf[9] - '0';
1202 if (level < 0 || level > 5) {
1203 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1204 SSL_R_INVALID_COMMAND);
1205 } else {
1206 c->sec_level = level;
1207 ok = 1;
1208 }
1209 } else
1210 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND);
1211 if (ok == 0)
1212 retval = 0;
1213 /*
1214 * We do not support any "multi" options
1215 * together with "@", so throw away the
1216 * rest of the command, if any left, until
1217 * end or ':' is found.
1218 */
1219 while ((*l != '\0') && !ITEM_SEP(*l))
1220 l++;
1221 } else if (found) {
1222 ssl_cipher_apply_rule(cipher_id,
1223 alg_mkey, alg_auth, alg_enc, alg_mac,
1224 min_tls, algo_strength, rule, -1, head_p,
1225 tail_p);
1226 } else {
1227 while ((*l != '\0') && !ITEM_SEP(*l))
1228 l++;
1229 }
1230 if (*l == '\0')
1231 break; /* done */
1232 }
1233
1234 return (retval);
1235}
1236
1237#ifndef OPENSSL_NO_EC
1238static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1239 const char **prule_str)
1240{
1241 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1242 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1243 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1244 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1245 suiteb_comb2 = 1;
1246 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1247 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1248 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1249 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1250 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1251 }
1252
1253 if (suiteb_flags) {
1254 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1255 c->cert_flags |= suiteb_flags;
1256 } else
1257 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1258
1259 if (!suiteb_flags)
1260 return 1;
1261 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1262
1263 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1264 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1265 SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1266 return 0;
1267 }
1268# ifndef OPENSSL_NO_EC
1269 switch (suiteb_flags) {
1270 case SSL_CERT_FLAG_SUITEB_128_LOS:
1271 if (suiteb_comb2)
1272 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1273 else
1274 *prule_str =
1275 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1276 break;
1277 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1278 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1279 break;
1280 case SSL_CERT_FLAG_SUITEB_192_LOS:
1281 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1282 break;
1283 }
1284 return 1;
1285# else
1286 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE);
1287 return 0;
1288# endif
1289}
1290#endif
1291
1292STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
1293 **cipher_list, STACK_OF(SSL_CIPHER)
1294 **cipher_list_by_id,
1295 const char *rule_str, CERT *c)
1296{
1297 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1298 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1299 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1300 const char *rule_p;
1301 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1302 const SSL_CIPHER **ca_list = NULL;
1303
1304 /*
1305 * Return with error if nothing to do.
1306 */
1307 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1308 return NULL;
1309#ifndef OPENSSL_NO_EC
1310 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1311 return NULL;
1312#endif
1313
1314 /*
1315 * To reduce the work to do we only want to process the compiled
1316 * in algorithms, so we first get the mask of disabled ciphers.
1317 */
1318
1319 disabled_mkey = disabled_mkey_mask;
1320 disabled_auth = disabled_auth_mask;
1321 disabled_enc = disabled_enc_mask;
1322 disabled_mac = disabled_mac_mask;
1323
1324 /*
1325 * Now we have to collect the available ciphers from the compiled
1326 * in ciphers. We cannot get more than the number compiled in, so
1327 * it is used for allocation.
1328 */
1329 num_of_ciphers = ssl_method->num_ciphers();
1330
1331 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1332 if (co_list == NULL) {
1333 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1334 return (NULL); /* Failure */
1335 }
1336
1337 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1338 disabled_mkey, disabled_auth, disabled_enc,
1339 disabled_mac, co_list, &head, &tail);
1340
1341 /* Now arrange all ciphers by preference. */
1342
1343 /*
1344 * Everything else being equal, prefer ephemeral ECDH over other key
1345 * exchange mechanisms.
1346 * For consistency, prefer ECDSA over RSA (though this only matters if the
1347 * server has both certificates, and is using the DEFAULT, or a client
1348 * preference).
1349 */
1350 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1351 -1, &head, &tail);
1352 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1353 &tail);
1354 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1355 &tail);
1356
1357 /* Within each strength group, we prefer GCM over CHACHA... */
1358 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1359 &head, &tail);
1360 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1361 &head, &tail);
1362
1363 /*
1364 * ...and generally, our preferred cipher is AES.
1365 * Note that AEADs will be bumped to take preference after sorting by
1366 * strength.
1367 */
1368 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1369 -1, &head, &tail);
1370
1371 /* Temporarily enable everything else for sorting */
1372 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1373
1374 /* Low priority for MD5 */
1375 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1376 &tail);
1377
1378 /*
1379 * Move anonymous ciphers to the end. Usually, these will remain
1380 * disabled. (For applications that allow them, they aren't too bad, but
1381 * we prefer authenticated ciphers.)
1382 */
1383 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1384 &tail);
1385
1386 /*
1387 * ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1,
1388 * &head, &tail);
1389 */
1390 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1391 &tail);
1392 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1393 &tail);
1394
1395 /* RC4 is sort-of broken -- move the the end */
1396 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1397 &tail);
1398
1399 /*
1400 * Now sort by symmetric encryption strength. The above ordering remains
1401 * in force within each class
1402 */
1403 if (!ssl_cipher_strength_sort(&head, &tail)) {
1404 OPENSSL_free(co_list);
1405 return NULL;
1406 }
1407
1408 /*
1409 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1410 * TODO(openssl-team): is there an easier way to accomplish all this?
1411 */
1412 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
1413 &head, &tail);
1414
1415 /*
1416 * Irrespective of strength, enforce the following order:
1417 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1418 * Within each group, ciphers remain sorted by strength and previous
1419 * preference, i.e.,
1420 * 1) ECDHE > DHE
1421 * 2) GCM > CHACHA
1422 * 3) AES > rest
1423 * 4) TLS 1.2 > legacy
1424 *
1425 * Because we now bump ciphers to the top of the list, we proceed in
1426 * reverse order of preference.
1427 */
1428 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1429 &head, &tail);
1430 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
1431 CIPHER_BUMP, -1, &head, &tail);
1432 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
1433 CIPHER_BUMP, -1, &head, &tail);
1434
1435 /* Now disable everything (maintaining the ordering!) */
1436 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1437
1438 /*
1439 * We also need cipher aliases for selecting based on the rule_str.
1440 * There might be two types of entries in the rule_str: 1) names
1441 * of ciphers themselves 2) aliases for groups of ciphers.
1442 * For 1) we need the available ciphers and for 2) the cipher
1443 * groups of cipher_aliases added together in one list (otherwise
1444 * we would be happy with just the cipher_aliases table).
1445 */
1446 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
1447 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1448 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
1449 if (ca_list == NULL) {
1450 OPENSSL_free(co_list);
1451 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1452 return (NULL); /* Failure */
1453 }
1454 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1455 disabled_mkey, disabled_auth, disabled_enc,
1456 disabled_mac, head);
1457
1458 /*
1459 * If the rule_string begins with DEFAULT, apply the default rule
1460 * before using the (possibly available) additional rules.
1461 */
1462 ok = 1;
1463 rule_p = rule_str;
1464 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1465 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1466 &head, &tail, ca_list, c);
1467 rule_p += 7;
1468 if (*rule_p == ':')
1469 rule_p++;
1470 }
1471
1472 if (ok && (strlen(rule_p) > 0))
1473 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1474
1475 OPENSSL_free(ca_list); /* Not needed anymore */
1476
1477 if (!ok) { /* Rule processing failure */
1478 OPENSSL_free(co_list);
1479 return (NULL);
1480 }
1481
1482 /*
1483 * Allocate new "cipherstack" for the result, return with error
1484 * if we cannot get one.
1485 */
1486 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1487 OPENSSL_free(co_list);
1488 return (NULL);
1489 }
1490
1491 /*
1492 * The cipher selection for the list is done. The ciphers are added
1493 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1494 */
1495 for (curr = head; curr != NULL; curr = curr->next) {
1496 if (curr->active
1497 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS)) {
1498 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1499 OPENSSL_free(co_list);
1500 sk_SSL_CIPHER_free(cipherstack);
1501 return NULL;
1502 }
1503#ifdef CIPHER_DEBUG
1504 fprintf(stderr, "<%s>\n", curr->cipher->name);
1505#endif
1506 }
1507 }
1508 OPENSSL_free(co_list); /* Not needed any longer */
1509
1510 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1511 if (tmp_cipher_list == NULL) {
1512 sk_SSL_CIPHER_free(cipherstack);
1513 return NULL;
1514 }
1515 sk_SSL_CIPHER_free(*cipher_list);
1516 *cipher_list = cipherstack;
1517 if (*cipher_list_by_id != NULL)
1518 sk_SSL_CIPHER_free(*cipher_list_by_id);
1519 *cipher_list_by_id = tmp_cipher_list;
1520 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1521
1522 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1523 return (cipherstack);
1524}
1525
1526char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1527{
1528 const char *ver;
1529 const char *kx, *au, *enc, *mac;
1530 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1531 static const char *format = "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n";
1532
1533 if (buf == NULL) {
1534 len = 128;
1535 buf = OPENSSL_malloc(len);
1536 if (buf == NULL)
1537 return NULL;
1538 } else if (len < 128)
1539 return NULL;
1540
1541 alg_mkey = cipher->algorithm_mkey;
1542 alg_auth = cipher->algorithm_auth;
1543 alg_enc = cipher->algorithm_enc;
1544 alg_mac = cipher->algorithm_mac;
1545
1546 ver = ssl_protocol_to_string(cipher->min_tls);
1547
1548 switch (alg_mkey) {
1549 case SSL_kRSA:
1550 kx = "RSA";
1551 break;
1552 case SSL_kDHE:
1553 kx = "DH";
1554 break;
1555 case SSL_kECDHE:
1556 kx = "ECDH";
1557 break;
1558 case SSL_kPSK:
1559 kx = "PSK";
1560 break;
1561 case SSL_kRSAPSK:
1562 kx = "RSAPSK";
1563 break;
1564 case SSL_kECDHEPSK:
1565 kx = "ECDHEPSK";
1566 break;
1567 case SSL_kDHEPSK:
1568 kx = "DHEPSK";
1569 break;
1570 case SSL_kSRP:
1571 kx = "SRP";
1572 break;
1573 case SSL_kGOST:
1574 kx = "GOST";
1575 break;
1576 default:
1577 kx = "unknown";
1578 }
1579
1580 switch (alg_auth) {
1581 case SSL_aRSA:
1582 au = "RSA";
1583 break;
1584 case SSL_aDSS:
1585 au = "DSS";
1586 break;
1587 case SSL_aNULL:
1588 au = "None";
1589 break;
1590 case SSL_aECDSA:
1591 au = "ECDSA";
1592 break;
1593 case SSL_aPSK:
1594 au = "PSK";
1595 break;
1596 case SSL_aSRP:
1597 au = "SRP";
1598 break;
1599 case SSL_aGOST01:
1600 au = "GOST01";
1601 break;
1602 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1603 case (SSL_aGOST12 | SSL_aGOST01):
1604 au = "GOST12";
1605 break;
1606 default:
1607 au = "unknown";
1608 break;
1609 }
1610
1611 switch (alg_enc) {
1612 case SSL_DES:
1613 enc = "DES(56)";
1614 break;
1615 case SSL_3DES:
1616 enc = "3DES(168)";
1617 break;
1618 case SSL_RC4:
1619 enc = "RC4(128)";
1620 break;
1621 case SSL_RC2:
1622 enc = "RC2(128)";
1623 break;
1624 case SSL_IDEA:
1625 enc = "IDEA(128)";
1626 break;
1627 case SSL_eNULL:
1628 enc = "None";
1629 break;
1630 case SSL_AES128:
1631 enc = "AES(128)";
1632 break;
1633 case SSL_AES256:
1634 enc = "AES(256)";
1635 break;
1636 case SSL_AES128GCM:
1637 enc = "AESGCM(128)";
1638 break;
1639 case SSL_AES256GCM:
1640 enc = "AESGCM(256)";
1641 break;
1642 case SSL_AES128CCM:
1643 enc = "AESCCM(128)";
1644 break;
1645 case SSL_AES256CCM:
1646 enc = "AESCCM(256)";
1647 break;
1648 case SSL_AES128CCM8:
1649 enc = "AESCCM8(128)";
1650 break;
1651 case SSL_AES256CCM8:
1652 enc = "AESCCM8(256)";
1653 break;
1654 case SSL_CAMELLIA128:
1655 enc = "Camellia(128)";
1656 break;
1657 case SSL_CAMELLIA256:
1658 enc = "Camellia(256)";
1659 break;
1660 case SSL_SEED:
1661 enc = "SEED(128)";
1662 break;
1663 case SSL_eGOST2814789CNT:
1664 case SSL_eGOST2814789CNT12:
1665 enc = "GOST89(256)";
1666 break;
1667 case SSL_CHACHA20POLY1305:
1668 enc = "CHACHA20/POLY1305(256)";
1669 break;
1670 default:
1671 enc = "unknown";
1672 break;
1673 }
1674
1675 switch (alg_mac) {
1676 case SSL_MD5:
1677 mac = "MD5";
1678 break;
1679 case SSL_SHA1:
1680 mac = "SHA1";
1681 break;
1682 case SSL_SHA256:
1683 mac = "SHA256";
1684 break;
1685 case SSL_SHA384:
1686 mac = "SHA384";
1687 break;
1688 case SSL_AEAD:
1689 mac = "AEAD";
1690 break;
1691 case SSL_GOST89MAC:
1692 case SSL_GOST89MAC12:
1693 mac = "GOST89";
1694 break;
1695 case SSL_GOST94:
1696 mac = "GOST94";
1697 break;
1698 case SSL_GOST12_256:
1699 case SSL_GOST12_512:
1700 mac = "GOST2012";
1701 break;
1702 default:
1703 mac = "unknown";
1704 break;
1705 }
1706
1707 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1708
1709 return (buf);
1710}
1711
1712const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1713{
1714 if (c == NULL)
1715 return "(NONE)";
1716
1717 /*
1718 * Backwards-compatibility crutch. In almost all contexts we report TLS
1719 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1720 */
1721 if (c->min_tls == TLS1_VERSION)
1722 return "TLSv1.0";
1723 return ssl_protocol_to_string(c->min_tls);
1724}
1725
1726/* return the actual cipher being used */
1727const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1728{
1729 if (c != NULL)
1730 return (c->name);
1731 return ("(NONE)");
1732}
1733
1734/* number of bits for symmetric cipher */
1735int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1736{
1737 int ret = 0;
1738
1739 if (c != NULL) {
1740 if (alg_bits != NULL)
1741 *alg_bits = (int)c->alg_bits;
1742 ret = (int)c->strength_bits;
1743 }
1744 return ret;
1745}
1746
1747uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1748{
1749 return c->id;
1750}
1751
1752SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1753{
1754 SSL_COMP *ctmp;
1755 int i, nn;
1756
1757 if ((n == 0) || (sk == NULL))
1758 return (NULL);
1759 nn = sk_SSL_COMP_num(sk);
1760 for (i = 0; i < nn; i++) {
1761 ctmp = sk_SSL_COMP_value(sk, i);
1762 if (ctmp->id == n)
1763 return (ctmp);
1764 }
1765 return (NULL);
1766}
1767
1768#ifdef OPENSSL_NO_COMP
1769STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1770{
1771 return NULL;
1772}
1773
1774STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1775 *meths)
1776{
1777 return meths;
1778}
1779
1780int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1781{
1782 return 1;
1783}
1784
1785#else
1786STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1787{
1788 load_builtin_compressions();
1789 return (ssl_comp_methods);
1790}
1791
1792STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1793 *meths)
1794{
1795 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1796 ssl_comp_methods = meths;
1797 return old_meths;
1798}
1799
1800static void cmeth_free(SSL_COMP *cm)
1801{
1802 OPENSSL_free(cm);
1803}
1804
1805void ssl_comp_free_compression_methods_int(void)
1806{
1807 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
1808 ssl_comp_methods = NULL;
1809 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
1810}
1811
1812int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1813{
1814 SSL_COMP *comp;
1815
1816 if (cm == NULL || COMP_get_type(cm) == NID_undef)
1817 return 1;
1818
1819 /*-
1820 * According to draft-ietf-tls-compression-04.txt, the
1821 * compression number ranges should be the following:
1822 *
1823 * 0 to 63: methods defined by the IETF
1824 * 64 to 192: external party methods assigned by IANA
1825 * 193 to 255: reserved for private use
1826 */
1827 if (id < 193 || id > 255) {
1828 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1829 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1830 return 1;
1831 }
1832
1833 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
1834 comp = OPENSSL_malloc(sizeof(*comp));
1835 if (comp == NULL) {
1836 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1837 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1838 return (1);
1839 }
1840
1841 comp->id = id;
1842 comp->method = cm;
1843 load_builtin_compressions();
1844 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1845 OPENSSL_free(comp);
1846 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1847 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1848 SSL_R_DUPLICATE_COMPRESSION_ID);
1849 return (1);
1850 }
1851 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
1852 OPENSSL_free(comp);
1853 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1854 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1855 return (1);
1856 }
1857 CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
1858 return (0);
1859}
1860#endif
1861
1862const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1863{
1864#ifndef OPENSSL_NO_COMP
1865 return comp ? COMP_get_name(comp) : NULL;
1866#else
1867 return NULL;
1868#endif
1869}
1870
1871const char *SSL_COMP_get0_name(const SSL_COMP *comp)
1872{
1873#ifndef OPENSSL_NO_COMP
1874 return comp->name;
1875#else
1876 return NULL;
1877#endif
1878}
1879
1880int SSL_COMP_get_id(const SSL_COMP *comp)
1881{
1882#ifndef OPENSSL_NO_COMP
1883 return comp->id;
1884#else
1885 return -1;
1886#endif
1887}
1888
1889/* For a cipher return the index corresponding to the certificate type */
1890int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1891{
1892 uint32_t alg_a;
1893
1894 alg_a = c->algorithm_auth;
1895
1896 if (alg_a & SSL_aECDSA)
1897 return SSL_PKEY_ECC;
1898 else if (alg_a & SSL_aDSS)
1899 return SSL_PKEY_DSA_SIGN;
1900 else if (alg_a & SSL_aRSA)
1901 return SSL_PKEY_RSA_ENC;
1902 else if (alg_a & SSL_aGOST12)
1903 return SSL_PKEY_GOST_EC;
1904 else if (alg_a & SSL_aGOST01)
1905 return SSL_PKEY_GOST01;
1906
1907 return -1;
1908}
1909
1910const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
1911{
1912 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
1913
1914 if (c == NULL || c->valid == 0)
1915 return NULL;
1916 return c;
1917}
1918
1919const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
1920{
1921 return ssl->method->get_cipher_by_char(ptr);
1922}
1923
1924int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1925{
1926 int i;
1927 if (c == NULL)
1928 return NID_undef;
1929 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
1930 if (i == -1)
1931 return NID_undef;
1932 return ssl_cipher_table_cipher[i].nid;
1933}
1934
1935int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1936{
1937 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
1938
1939 if (i == -1)
1940 return NID_undef;
1941 return ssl_cipher_table_mac[i].nid;
1942}
1943
1944int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
1945{
1946 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
1947
1948 if (i == -1)
1949 return NID_undef;
1950 return ssl_cipher_table_kx[i].nid;
1951}
1952
1953int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
1954{
1955 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
1956
1957 if (i == -1)
1958 return NID_undef;
1959 return ssl_cipher_table_auth[i].nid;
1960}
1961
1962int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
1963{
1964 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
1965}
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