1 | /* |
2 | * Copyright 1995-2018 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. |
5 | * |
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 |
10 | */ |
11 | |
12 | #include <stdio.h> |
13 | #include <ctype.h> |
14 | #include <openssl/objects.h> |
15 | #include <openssl/comp.h> |
16 | #include <openssl/engine.h> |
17 | #include <openssl/crypto.h> |
18 | #include <openssl/conf.h> |
19 | #include <openssl/trace.h> |
20 | #include "internal/nelem.h" |
21 | #include "ssl_local.h" |
22 | #include "internal/thread_once.h" |
23 | #include "internal/cryptlib.h" |
24 | |
25 | #define SSL_ENC_DES_IDX 0 |
26 | #define SSL_ENC_3DES_IDX 1 |
27 | #define SSL_ENC_RC4_IDX 2 |
28 | #define SSL_ENC_RC2_IDX 3 |
29 | #define SSL_ENC_IDEA_IDX 4 |
30 | #define SSL_ENC_NULL_IDX 5 |
31 | #define SSL_ENC_AES128_IDX 6 |
32 | #define SSL_ENC_AES256_IDX 7 |
33 | #define SSL_ENC_CAMELLIA128_IDX 8 |
34 | #define SSL_ENC_CAMELLIA256_IDX 9 |
35 | #define SSL_ENC_GOST89_IDX 10 |
36 | #define SSL_ENC_SEED_IDX 11 |
37 | #define SSL_ENC_AES128GCM_IDX 12 |
38 | #define SSL_ENC_AES256GCM_IDX 13 |
39 | #define SSL_ENC_AES128CCM_IDX 14 |
40 | #define SSL_ENC_AES256CCM_IDX 15 |
41 | #define SSL_ENC_AES128CCM8_IDX 16 |
42 | #define SSL_ENC_AES256CCM8_IDX 17 |
43 | #define SSL_ENC_GOST8912_IDX 18 |
44 | #define SSL_ENC_CHACHA_IDX 19 |
45 | #define SSL_ENC_ARIA128GCM_IDX 20 |
46 | #define SSL_ENC_ARIA256GCM_IDX 21 |
47 | #define SSL_ENC_NUM_IDX 22 |
48 | |
49 | /* NB: make sure indices in these tables match values above */ |
50 | |
51 | typedef struct { |
52 | uint32_t mask; |
53 | int nid; |
54 | } ssl_cipher_table; |
55 | |
56 | /* Table of NIDs for each cipher */ |
57 | static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = { |
58 | {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */ |
59 | {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */ |
60 | {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */ |
61 | {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */ |
62 | {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */ |
63 | {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */ |
64 | {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */ |
65 | {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */ |
66 | {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */ |
67 | {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */ |
68 | {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */ |
69 | {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */ |
70 | {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */ |
71 | {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */ |
72 | {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */ |
73 | {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */ |
74 | {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */ |
75 | {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */ |
76 | {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */ |
77 | {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */ |
78 | {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */ |
79 | {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */ |
80 | }; |
81 | |
82 | static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]; |
83 | |
84 | #define SSL_COMP_NULL_IDX 0 |
85 | #define SSL_COMP_ZLIB_IDX 1 |
86 | #define SSL_COMP_NUM_IDX 2 |
87 | |
88 | static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL; |
89 | |
90 | #ifndef OPENSSL_NO_COMP |
91 | static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT; |
92 | #endif |
93 | |
94 | /* |
95 | * Constant SSL_MAX_DIGEST equal to size of digests array should be defined |
96 | * in the ssl_local.h |
97 | */ |
98 | |
99 | #define SSL_MD_NUM_IDX SSL_MAX_DIGEST |
100 | |
101 | /* NB: make sure indices in this table matches values above */ |
102 | static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = { |
103 | {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */ |
104 | {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */ |
105 | {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */ |
106 | {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */ |
107 | {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */ |
108 | {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */ |
109 | {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */ |
110 | {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */ |
111 | {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */ |
112 | {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */ |
113 | {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */ |
114 | {0, NID_sha512} /* SSL_MD_SHA512_IDX 11 */ |
115 | }; |
116 | |
117 | static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = { |
118 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL |
119 | }; |
120 | |
121 | /* *INDENT-OFF* */ |
122 | static const ssl_cipher_table ssl_cipher_table_kx[] = { |
123 | {SSL_kRSA, NID_kx_rsa}, |
124 | {SSL_kECDHE, NID_kx_ecdhe}, |
125 | {SSL_kDHE, NID_kx_dhe}, |
126 | {SSL_kECDHEPSK, NID_kx_ecdhe_psk}, |
127 | {SSL_kDHEPSK, NID_kx_dhe_psk}, |
128 | {SSL_kRSAPSK, NID_kx_rsa_psk}, |
129 | {SSL_kPSK, NID_kx_psk}, |
130 | {SSL_kSRP, NID_kx_srp}, |
131 | {SSL_kGOST, NID_kx_gost}, |
132 | {SSL_kANY, NID_kx_any} |
133 | }; |
134 | |
135 | static const ssl_cipher_table ssl_cipher_table_auth[] = { |
136 | {SSL_aRSA, NID_auth_rsa}, |
137 | {SSL_aECDSA, NID_auth_ecdsa}, |
138 | {SSL_aPSK, NID_auth_psk}, |
139 | {SSL_aDSS, NID_auth_dss}, |
140 | {SSL_aGOST01, NID_auth_gost01}, |
141 | {SSL_aGOST12, NID_auth_gost12}, |
142 | {SSL_aSRP, NID_auth_srp}, |
143 | {SSL_aNULL, NID_auth_null}, |
144 | {SSL_aANY, NID_auth_any} |
145 | }; |
146 | /* *INDENT-ON* */ |
147 | |
148 | /* Utility function for table lookup */ |
149 | static int ssl_cipher_info_find(const ssl_cipher_table * table, |
150 | size_t table_cnt, uint32_t mask) |
151 | { |
152 | size_t i; |
153 | for (i = 0; i < table_cnt; i++, table++) { |
154 | if (table->mask == mask) |
155 | return (int)i; |
156 | } |
157 | return -1; |
158 | } |
159 | |
160 | #define ssl_cipher_info_lookup(table, x) \ |
161 | ssl_cipher_info_find(table, OSSL_NELEM(table), x) |
162 | |
163 | /* |
164 | * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation |
165 | * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is |
166 | * found |
167 | */ |
168 | static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = { |
169 | /* MD5, SHA, GOST94, MAC89 */ |
170 | EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, |
171 | /* SHA256, SHA384, GOST2012_256, MAC89-12 */ |
172 | EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef, |
173 | /* GOST2012_512 */ |
174 | EVP_PKEY_HMAC, |
175 | /* MD5/SHA1, SHA224, SHA512 */ |
176 | NID_undef, NID_undef, NID_undef |
177 | }; |
178 | |
179 | static size_t ssl_mac_secret_size[SSL_MD_NUM_IDX]; |
180 | |
181 | #define CIPHER_ADD 1 |
182 | #define CIPHER_KILL 2 |
183 | #define CIPHER_DEL 3 |
184 | #define CIPHER_ORD 4 |
185 | #define CIPHER_SPECIAL 5 |
186 | /* |
187 | * Bump the ciphers to the top of the list. |
188 | * This rule isn't currently supported by the public cipherstring API. |
189 | */ |
190 | #define CIPHER_BUMP 6 |
191 | |
192 | typedef struct cipher_order_st { |
193 | const SSL_CIPHER *cipher; |
194 | int active; |
195 | int dead; |
196 | struct cipher_order_st *next, *prev; |
197 | } CIPHER_ORDER; |
198 | |
199 | static const SSL_CIPHER cipher_aliases[] = { |
200 | /* "ALL" doesn't include eNULL (must be specifically enabled) */ |
201 | {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL}, |
202 | /* "COMPLEMENTOFALL" */ |
203 | {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL}, |
204 | |
205 | /* |
206 | * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in |
207 | * ALL!) |
208 | */ |
209 | {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT}, |
210 | |
211 | /* |
212 | * key exchange aliases (some of those using only a single bit here |
213 | * combine multiple key exchange algs according to the RFCs, e.g. kDHE |
214 | * combines DHE_DSS and DHE_RSA) |
215 | */ |
216 | {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA}, |
217 | |
218 | {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE}, |
219 | {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE}, |
220 | {0, SSL_TXT_DH, NULL, 0, SSL_kDHE}, |
221 | |
222 | {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE}, |
223 | {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE}, |
224 | {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE}, |
225 | |
226 | {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK}, |
227 | {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK}, |
228 | {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK}, |
229 | {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK}, |
230 | {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP}, |
231 | {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST}, |
232 | |
233 | /* server authentication aliases */ |
234 | {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA}, |
235 | {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS}, |
236 | {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS}, |
237 | {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL}, |
238 | {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA}, |
239 | {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA}, |
240 | {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK}, |
241 | {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01}, |
242 | {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12}, |
243 | {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12}, |
244 | {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP}, |
245 | |
246 | /* aliases combining key exchange and server authentication */ |
247 | {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL}, |
248 | {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL}, |
249 | {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, |
250 | {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL}, |
251 | {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL}, |
252 | {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA}, |
253 | {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL}, |
254 | {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL}, |
255 | {0, SSL_TXT_PSK, NULL, 0, SSL_PSK}, |
256 | {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP}, |
257 | |
258 | /* symmetric encryption aliases */ |
259 | {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES}, |
260 | {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4}, |
261 | {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2}, |
262 | {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA}, |
263 | {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED}, |
264 | {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL}, |
265 | {0, SSL_TXT_GOST, NULL, 0, 0, 0, SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12}, |
266 | {0, SSL_TXT_AES128, NULL, 0, 0, 0, |
267 | SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8}, |
268 | {0, SSL_TXT_AES256, NULL, 0, 0, 0, |
269 | SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8}, |
270 | {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES}, |
271 | {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM}, |
272 | {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0, |
273 | SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8}, |
274 | {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8}, |
275 | {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128}, |
276 | {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256}, |
277 | {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA}, |
278 | {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20}, |
279 | |
280 | {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA}, |
281 | {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM}, |
282 | {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM}, |
283 | {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM}, |
284 | |
285 | /* MAC aliases */ |
286 | {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5}, |
287 | {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1}, |
288 | {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1}, |
289 | {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94}, |
290 | {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12}, |
291 | {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256}, |
292 | {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384}, |
293 | {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256}, |
294 | |
295 | /* protocol version aliases */ |
296 | {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION}, |
297 | {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, |
298 | {0, "TLSv1.0" , NULL, 0, 0, 0, 0, 0, TLS1_VERSION}, |
299 | {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION}, |
300 | |
301 | /* strength classes */ |
302 | {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW}, |
303 | {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM}, |
304 | {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH}, |
305 | /* FIPS 140-2 approved ciphersuite */ |
306 | {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS}, |
307 | |
308 | /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */ |
309 | {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0, |
310 | SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, |
311 | {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0, |
312 | SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS}, |
313 | |
314 | }; |
315 | |
316 | /* |
317 | * Search for public key algorithm with given name and return its pkey_id if |
318 | * it is available. Otherwise return 0 |
319 | */ |
320 | #ifdef OPENSSL_NO_ENGINE |
321 | |
322 | static int get_optional_pkey_id(const char *pkey_name) |
323 | { |
324 | const EVP_PKEY_ASN1_METHOD *ameth; |
325 | int pkey_id = 0; |
326 | ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1); |
327 | if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, |
328 | ameth) > 0) |
329 | return pkey_id; |
330 | return 0; |
331 | } |
332 | |
333 | #else |
334 | |
335 | static int get_optional_pkey_id(const char *pkey_name) |
336 | { |
337 | const EVP_PKEY_ASN1_METHOD *ameth; |
338 | ENGINE *tmpeng = NULL; |
339 | int pkey_id = 0; |
340 | ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1); |
341 | if (ameth) { |
342 | if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL, |
343 | ameth) <= 0) |
344 | pkey_id = 0; |
345 | } |
346 | ENGINE_finish(tmpeng); |
347 | return pkey_id; |
348 | } |
349 | |
350 | #endif |
351 | |
352 | /* masks of disabled algorithms */ |
353 | static uint32_t disabled_enc_mask; |
354 | static uint32_t disabled_mac_mask; |
355 | static uint32_t disabled_mkey_mask; |
356 | static uint32_t disabled_auth_mask; |
357 | |
358 | int ssl_load_ciphers(void) |
359 | { |
360 | size_t i; |
361 | const ssl_cipher_table *t; |
362 | |
363 | disabled_enc_mask = 0; |
364 | ssl_sort_cipher_list(); |
365 | for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) { |
366 | if (t->nid == NID_undef) { |
367 | ssl_cipher_methods[i] = NULL; |
368 | } else { |
369 | const EVP_CIPHER *cipher = EVP_get_cipherbynid(t->nid); |
370 | ssl_cipher_methods[i] = cipher; |
371 | if (cipher == NULL) |
372 | disabled_enc_mask |= t->mask; |
373 | } |
374 | } |
375 | disabled_mac_mask = 0; |
376 | for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) { |
377 | const EVP_MD *md = EVP_get_digestbynid(t->nid); |
378 | ssl_digest_methods[i] = md; |
379 | if (md == NULL) { |
380 | disabled_mac_mask |= t->mask; |
381 | } else { |
382 | int tmpsize = EVP_MD_size(md); |
383 | if (!ossl_assert(tmpsize >= 0)) |
384 | return 0; |
385 | ssl_mac_secret_size[i] = tmpsize; |
386 | } |
387 | } |
388 | /* Make sure we can access MD5 and SHA1 */ |
389 | if (!ossl_assert(ssl_digest_methods[SSL_MD_MD5_IDX] != NULL)) |
390 | return 0; |
391 | if (!ossl_assert(ssl_digest_methods[SSL_MD_SHA1_IDX] != NULL)) |
392 | return 0; |
393 | |
394 | disabled_mkey_mask = 0; |
395 | disabled_auth_mask = 0; |
396 | |
397 | #ifdef OPENSSL_NO_RSA |
398 | disabled_mkey_mask |= SSL_kRSA | SSL_kRSAPSK; |
399 | disabled_auth_mask |= SSL_aRSA; |
400 | #endif |
401 | #ifdef OPENSSL_NO_DSA |
402 | disabled_auth_mask |= SSL_aDSS; |
403 | #endif |
404 | #ifdef OPENSSL_NO_DH |
405 | disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK; |
406 | #endif |
407 | #ifdef OPENSSL_NO_EC |
408 | disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK; |
409 | disabled_auth_mask |= SSL_aECDSA; |
410 | #endif |
411 | #ifdef OPENSSL_NO_PSK |
412 | disabled_mkey_mask |= SSL_PSK; |
413 | disabled_auth_mask |= SSL_aPSK; |
414 | #endif |
415 | #ifdef OPENSSL_NO_SRP |
416 | disabled_mkey_mask |= SSL_kSRP; |
417 | #endif |
418 | |
419 | /* |
420 | * Check for presence of GOST 34.10 algorithms, and if they are not |
421 | * present, disable appropriate auth and key exchange |
422 | */ |
423 | ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac" ); |
424 | if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) |
425 | ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32; |
426 | else |
427 | disabled_mac_mask |= SSL_GOST89MAC; |
428 | |
429 | ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] = |
430 | get_optional_pkey_id("gost-mac-12" ); |
431 | if (ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX]) |
432 | ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32; |
433 | else |
434 | disabled_mac_mask |= SSL_GOST89MAC12; |
435 | |
436 | if (!get_optional_pkey_id("gost2001" )) |
437 | disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12; |
438 | if (!get_optional_pkey_id("gost2012_256" )) |
439 | disabled_auth_mask |= SSL_aGOST12; |
440 | if (!get_optional_pkey_id("gost2012_512" )) |
441 | disabled_auth_mask |= SSL_aGOST12; |
442 | /* |
443 | * Disable GOST key exchange if no GOST signature algs are available * |
444 | */ |
445 | if ((disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) == |
446 | (SSL_aGOST01 | SSL_aGOST12)) |
447 | disabled_mkey_mask |= SSL_kGOST; |
448 | |
449 | return 1; |
450 | } |
451 | |
452 | #ifndef OPENSSL_NO_COMP |
453 | |
454 | static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b) |
455 | { |
456 | return ((*a)->id - (*b)->id); |
457 | } |
458 | |
459 | DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions) |
460 | { |
461 | SSL_COMP *comp = NULL; |
462 | COMP_METHOD *method = COMP_zlib(); |
463 | |
464 | ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp); |
465 | |
466 | if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) { |
467 | comp = OPENSSL_malloc(sizeof(*comp)); |
468 | if (comp != NULL) { |
469 | comp->method = method; |
470 | comp->id = SSL_COMP_ZLIB_IDX; |
471 | comp->name = COMP_get_name(method); |
472 | sk_SSL_COMP_push(ssl_comp_methods, comp); |
473 | sk_SSL_COMP_sort(ssl_comp_methods); |
474 | } |
475 | } |
476 | return 1; |
477 | } |
478 | |
479 | static int load_builtin_compressions(void) |
480 | { |
481 | return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions); |
482 | } |
483 | #endif |
484 | |
485 | int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, |
486 | const EVP_MD **md, int *mac_pkey_type, |
487 | size_t *mac_secret_size, SSL_COMP **comp, int use_etm) |
488 | { |
489 | int i; |
490 | const SSL_CIPHER *c; |
491 | |
492 | c = s->cipher; |
493 | if (c == NULL) |
494 | return 0; |
495 | if (comp != NULL) { |
496 | SSL_COMP ctmp; |
497 | #ifndef OPENSSL_NO_COMP |
498 | if (!load_builtin_compressions()) { |
499 | /* |
500 | * Currently don't care, since a failure only means that |
501 | * ssl_comp_methods is NULL, which is perfectly OK |
502 | */ |
503 | } |
504 | #endif |
505 | *comp = NULL; |
506 | ctmp.id = s->compress_meth; |
507 | if (ssl_comp_methods != NULL) { |
508 | i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp); |
509 | *comp = sk_SSL_COMP_value(ssl_comp_methods, i); |
510 | } |
511 | /* If were only interested in comp then return success */ |
512 | if ((enc == NULL) && (md == NULL)) |
513 | return 1; |
514 | } |
515 | |
516 | if ((enc == NULL) || (md == NULL)) |
517 | return 0; |
518 | |
519 | i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); |
520 | |
521 | if (i == -1) { |
522 | *enc = NULL; |
523 | } else { |
524 | if (i == SSL_ENC_NULL_IDX) |
525 | *enc = EVP_enc_null(); |
526 | else |
527 | *enc = ssl_cipher_methods[i]; |
528 | } |
529 | |
530 | i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); |
531 | if (i == -1) { |
532 | *md = NULL; |
533 | if (mac_pkey_type != NULL) |
534 | *mac_pkey_type = NID_undef; |
535 | if (mac_secret_size != NULL) |
536 | *mac_secret_size = 0; |
537 | if (c->algorithm_mac == SSL_AEAD) |
538 | mac_pkey_type = NULL; |
539 | } else { |
540 | *md = ssl_digest_methods[i]; |
541 | if (mac_pkey_type != NULL) |
542 | *mac_pkey_type = ssl_mac_pkey_id[i]; |
543 | if (mac_secret_size != NULL) |
544 | *mac_secret_size = ssl_mac_secret_size[i]; |
545 | } |
546 | |
547 | if ((*enc != NULL) && |
548 | (*md != NULL || (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)) |
549 | && (!mac_pkey_type || *mac_pkey_type != NID_undef)) { |
550 | const EVP_CIPHER *evp; |
551 | |
552 | if (use_etm) |
553 | return 1; |
554 | |
555 | if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR || |
556 | s->ssl_version < TLS1_VERSION) |
557 | return 1; |
558 | |
559 | if (c->algorithm_enc == SSL_RC4 && |
560 | c->algorithm_mac == SSL_MD5 && |
561 | (evp = EVP_get_cipherbyname("RC4-HMAC-MD5" ))) |
562 | *enc = evp, *md = NULL; |
563 | else if (c->algorithm_enc == SSL_AES128 && |
564 | c->algorithm_mac == SSL_SHA1 && |
565 | (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1" ))) |
566 | *enc = evp, *md = NULL; |
567 | else if (c->algorithm_enc == SSL_AES256 && |
568 | c->algorithm_mac == SSL_SHA1 && |
569 | (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1" ))) |
570 | *enc = evp, *md = NULL; |
571 | else if (c->algorithm_enc == SSL_AES128 && |
572 | c->algorithm_mac == SSL_SHA256 && |
573 | (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA256" ))) |
574 | *enc = evp, *md = NULL; |
575 | else if (c->algorithm_enc == SSL_AES256 && |
576 | c->algorithm_mac == SSL_SHA256 && |
577 | (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA256" ))) |
578 | *enc = evp, *md = NULL; |
579 | return 1; |
580 | } else { |
581 | return 0; |
582 | } |
583 | } |
584 | |
585 | const EVP_MD *ssl_md(int idx) |
586 | { |
587 | idx &= SSL_HANDSHAKE_MAC_MASK; |
588 | if (idx < 0 || idx >= SSL_MD_NUM_IDX) |
589 | return NULL; |
590 | return ssl_digest_methods[idx]; |
591 | } |
592 | |
593 | const EVP_MD *ssl_handshake_md(SSL *s) |
594 | { |
595 | return ssl_md(ssl_get_algorithm2(s)); |
596 | } |
597 | |
598 | const EVP_MD *ssl_prf_md(SSL *s) |
599 | { |
600 | return ssl_md(ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT); |
601 | } |
602 | |
603 | #define ITEM_SEP(a) \ |
604 | (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) |
605 | |
606 | static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, |
607 | CIPHER_ORDER **tail) |
608 | { |
609 | if (curr == *tail) |
610 | return; |
611 | if (curr == *head) |
612 | *head = curr->next; |
613 | if (curr->prev != NULL) |
614 | curr->prev->next = curr->next; |
615 | if (curr->next != NULL) |
616 | curr->next->prev = curr->prev; |
617 | (*tail)->next = curr; |
618 | curr->prev = *tail; |
619 | curr->next = NULL; |
620 | *tail = curr; |
621 | } |
622 | |
623 | static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr, |
624 | CIPHER_ORDER **tail) |
625 | { |
626 | if (curr == *head) |
627 | return; |
628 | if (curr == *tail) |
629 | *tail = curr->prev; |
630 | if (curr->next != NULL) |
631 | curr->next->prev = curr->prev; |
632 | if (curr->prev != NULL) |
633 | curr->prev->next = curr->next; |
634 | (*head)->prev = curr; |
635 | curr->next = *head; |
636 | curr->prev = NULL; |
637 | *head = curr; |
638 | } |
639 | |
640 | static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, |
641 | int num_of_ciphers, |
642 | uint32_t disabled_mkey, |
643 | uint32_t disabled_auth, |
644 | uint32_t disabled_enc, |
645 | uint32_t disabled_mac, |
646 | CIPHER_ORDER *co_list, |
647 | CIPHER_ORDER **head_p, |
648 | CIPHER_ORDER **tail_p) |
649 | { |
650 | int i, co_list_num; |
651 | const SSL_CIPHER *c; |
652 | |
653 | /* |
654 | * We have num_of_ciphers descriptions compiled in, depending on the |
655 | * method selected (SSLv3, TLSv1 etc). |
656 | * These will later be sorted in a linked list with at most num |
657 | * entries. |
658 | */ |
659 | |
660 | /* Get the initial list of ciphers */ |
661 | co_list_num = 0; /* actual count of ciphers */ |
662 | for (i = 0; i < num_of_ciphers; i++) { |
663 | c = ssl_method->get_cipher(i); |
664 | /* drop those that use any of that is not available */ |
665 | if (c == NULL || !c->valid) |
666 | continue; |
667 | if ((c->algorithm_mkey & disabled_mkey) || |
668 | (c->algorithm_auth & disabled_auth) || |
669 | (c->algorithm_enc & disabled_enc) || |
670 | (c->algorithm_mac & disabled_mac)) |
671 | continue; |
672 | if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) && |
673 | c->min_tls == 0) |
674 | continue; |
675 | if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) && |
676 | c->min_dtls == 0) |
677 | continue; |
678 | |
679 | co_list[co_list_num].cipher = c; |
680 | co_list[co_list_num].next = NULL; |
681 | co_list[co_list_num].prev = NULL; |
682 | co_list[co_list_num].active = 0; |
683 | co_list_num++; |
684 | } |
685 | |
686 | /* |
687 | * Prepare linked list from list entries |
688 | */ |
689 | if (co_list_num > 0) { |
690 | co_list[0].prev = NULL; |
691 | |
692 | if (co_list_num > 1) { |
693 | co_list[0].next = &co_list[1]; |
694 | |
695 | for (i = 1; i < co_list_num - 1; i++) { |
696 | co_list[i].prev = &co_list[i - 1]; |
697 | co_list[i].next = &co_list[i + 1]; |
698 | } |
699 | |
700 | co_list[co_list_num - 1].prev = &co_list[co_list_num - 2]; |
701 | } |
702 | |
703 | co_list[co_list_num - 1].next = NULL; |
704 | |
705 | *head_p = &co_list[0]; |
706 | *tail_p = &co_list[co_list_num - 1]; |
707 | } |
708 | } |
709 | |
710 | static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, |
711 | int num_of_group_aliases, |
712 | uint32_t disabled_mkey, |
713 | uint32_t disabled_auth, |
714 | uint32_t disabled_enc, |
715 | uint32_t disabled_mac, |
716 | CIPHER_ORDER *head) |
717 | { |
718 | CIPHER_ORDER *ciph_curr; |
719 | const SSL_CIPHER **ca_curr; |
720 | int i; |
721 | uint32_t mask_mkey = ~disabled_mkey; |
722 | uint32_t mask_auth = ~disabled_auth; |
723 | uint32_t mask_enc = ~disabled_enc; |
724 | uint32_t mask_mac = ~disabled_mac; |
725 | |
726 | /* |
727 | * First, add the real ciphers as already collected |
728 | */ |
729 | ciph_curr = head; |
730 | ca_curr = ca_list; |
731 | while (ciph_curr != NULL) { |
732 | *ca_curr = ciph_curr->cipher; |
733 | ca_curr++; |
734 | ciph_curr = ciph_curr->next; |
735 | } |
736 | |
737 | /* |
738 | * Now we add the available ones from the cipher_aliases[] table. |
739 | * They represent either one or more algorithms, some of which |
740 | * in any affected category must be supported (set in enabled_mask), |
741 | * or represent a cipher strength value (will be added in any case because algorithms=0). |
742 | */ |
743 | for (i = 0; i < num_of_group_aliases; i++) { |
744 | uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey; |
745 | uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth; |
746 | uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc; |
747 | uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac; |
748 | |
749 | if (algorithm_mkey) |
750 | if ((algorithm_mkey & mask_mkey) == 0) |
751 | continue; |
752 | |
753 | if (algorithm_auth) |
754 | if ((algorithm_auth & mask_auth) == 0) |
755 | continue; |
756 | |
757 | if (algorithm_enc) |
758 | if ((algorithm_enc & mask_enc) == 0) |
759 | continue; |
760 | |
761 | if (algorithm_mac) |
762 | if ((algorithm_mac & mask_mac) == 0) |
763 | continue; |
764 | |
765 | *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); |
766 | ca_curr++; |
767 | } |
768 | |
769 | *ca_curr = NULL; /* end of list */ |
770 | } |
771 | |
772 | static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey, |
773 | uint32_t alg_auth, uint32_t alg_enc, |
774 | uint32_t alg_mac, int min_tls, |
775 | uint32_t algo_strength, int rule, |
776 | int32_t strength_bits, CIPHER_ORDER **head_p, |
777 | CIPHER_ORDER **tail_p) |
778 | { |
779 | CIPHER_ORDER *head, *tail, *curr, *next, *last; |
780 | const SSL_CIPHER *cp; |
781 | int reverse = 0; |
782 | |
783 | OSSL_TRACE_BEGIN(TLS_CIPHER){ |
784 | BIO_printf(trc_out, |
785 | "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n" , |
786 | rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls, |
787 | algo_strength, strength_bits); |
788 | } |
789 | |
790 | if (rule == CIPHER_DEL || rule == CIPHER_BUMP) |
791 | reverse = 1; /* needed to maintain sorting between currently |
792 | * deleted ciphers */ |
793 | |
794 | head = *head_p; |
795 | tail = *tail_p; |
796 | |
797 | if (reverse) { |
798 | next = tail; |
799 | last = head; |
800 | } else { |
801 | next = head; |
802 | last = tail; |
803 | } |
804 | |
805 | curr = NULL; |
806 | for (;;) { |
807 | if (curr == last) |
808 | break; |
809 | |
810 | curr = next; |
811 | |
812 | if (curr == NULL) |
813 | break; |
814 | |
815 | next = reverse ? curr->prev : curr->next; |
816 | |
817 | cp = curr->cipher; |
818 | |
819 | /* |
820 | * Selection criteria is either the value of strength_bits |
821 | * or the algorithms used. |
822 | */ |
823 | if (strength_bits >= 0) { |
824 | if (strength_bits != cp->strength_bits) |
825 | continue; |
826 | } else { |
827 | if (trc_out != NULL) { |
828 | BIO_printf(trc_out, |
829 | "\nName: %s:" |
830 | "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n" , |
831 | cp->name, cp->algorithm_mkey, cp->algorithm_auth, |
832 | cp->algorithm_enc, cp->algorithm_mac, cp->min_tls, |
833 | cp->algo_strength); |
834 | } |
835 | if (cipher_id != 0 && (cipher_id != cp->id)) |
836 | continue; |
837 | if (alg_mkey && !(alg_mkey & cp->algorithm_mkey)) |
838 | continue; |
839 | if (alg_auth && !(alg_auth & cp->algorithm_auth)) |
840 | continue; |
841 | if (alg_enc && !(alg_enc & cp->algorithm_enc)) |
842 | continue; |
843 | if (alg_mac && !(alg_mac & cp->algorithm_mac)) |
844 | continue; |
845 | if (min_tls && (min_tls != cp->min_tls)) |
846 | continue; |
847 | if ((algo_strength & SSL_STRONG_MASK) |
848 | && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength)) |
849 | continue; |
850 | if ((algo_strength & SSL_DEFAULT_MASK) |
851 | && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength)) |
852 | continue; |
853 | } |
854 | |
855 | if (trc_out != NULL) |
856 | BIO_printf(trc_out, "Action = %d\n" , rule); |
857 | |
858 | /* add the cipher if it has not been added yet. */ |
859 | if (rule == CIPHER_ADD) { |
860 | /* reverse == 0 */ |
861 | if (!curr->active) { |
862 | ll_append_tail(&head, curr, &tail); |
863 | curr->active = 1; |
864 | } |
865 | } |
866 | /* Move the added cipher to this location */ |
867 | else if (rule == CIPHER_ORD) { |
868 | /* reverse == 0 */ |
869 | if (curr->active) { |
870 | ll_append_tail(&head, curr, &tail); |
871 | } |
872 | } else if (rule == CIPHER_DEL) { |
873 | /* reverse == 1 */ |
874 | if (curr->active) { |
875 | /* |
876 | * most recently deleted ciphersuites get best positions for |
877 | * any future CIPHER_ADD (note that the CIPHER_DEL loop works |
878 | * in reverse to maintain the order) |
879 | */ |
880 | ll_append_head(&head, curr, &tail); |
881 | curr->active = 0; |
882 | } |
883 | } else if (rule == CIPHER_BUMP) { |
884 | if (curr->active) |
885 | ll_append_head(&head, curr, &tail); |
886 | } else if (rule == CIPHER_KILL) { |
887 | /* reverse == 0 */ |
888 | if (head == curr) |
889 | head = curr->next; |
890 | else |
891 | curr->prev->next = curr->next; |
892 | if (tail == curr) |
893 | tail = curr->prev; |
894 | curr->active = 0; |
895 | if (curr->next != NULL) |
896 | curr->next->prev = curr->prev; |
897 | if (curr->prev != NULL) |
898 | curr->prev->next = curr->next; |
899 | curr->next = NULL; |
900 | curr->prev = NULL; |
901 | } |
902 | } |
903 | |
904 | *head_p = head; |
905 | *tail_p = tail; |
906 | |
907 | OSSL_TRACE_END(TLS_CIPHER); |
908 | } |
909 | |
910 | static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, |
911 | CIPHER_ORDER **tail_p) |
912 | { |
913 | int32_t max_strength_bits; |
914 | int i, *number_uses; |
915 | CIPHER_ORDER *curr; |
916 | |
917 | /* |
918 | * This routine sorts the ciphers with descending strength. The sorting |
919 | * must keep the pre-sorted sequence, so we apply the normal sorting |
920 | * routine as '+' movement to the end of the list. |
921 | */ |
922 | max_strength_bits = 0; |
923 | curr = *head_p; |
924 | while (curr != NULL) { |
925 | if (curr->active && (curr->cipher->strength_bits > max_strength_bits)) |
926 | max_strength_bits = curr->cipher->strength_bits; |
927 | curr = curr->next; |
928 | } |
929 | |
930 | number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1)); |
931 | if (number_uses == NULL) { |
932 | SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE); |
933 | return 0; |
934 | } |
935 | |
936 | /* |
937 | * Now find the strength_bits values actually used |
938 | */ |
939 | curr = *head_p; |
940 | while (curr != NULL) { |
941 | if (curr->active) |
942 | number_uses[curr->cipher->strength_bits]++; |
943 | curr = curr->next; |
944 | } |
945 | /* |
946 | * Go through the list of used strength_bits values in descending |
947 | * order. |
948 | */ |
949 | for (i = max_strength_bits; i >= 0; i--) |
950 | if (number_uses[i] > 0) |
951 | ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, |
952 | tail_p); |
953 | |
954 | OPENSSL_free(number_uses); |
955 | return 1; |
956 | } |
957 | |
958 | static int ssl_cipher_process_rulestr(const char *rule_str, |
959 | CIPHER_ORDER **head_p, |
960 | CIPHER_ORDER **tail_p, |
961 | const SSL_CIPHER **ca_list, CERT *c) |
962 | { |
963 | uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength; |
964 | int min_tls; |
965 | const char *l, *buf; |
966 | int j, multi, found, rule, retval, ok, buflen; |
967 | uint32_t cipher_id = 0; |
968 | char ch; |
969 | |
970 | retval = 1; |
971 | l = rule_str; |
972 | for ( ; ; ) { |
973 | ch = *l; |
974 | |
975 | if (ch == '\0') |
976 | break; /* done */ |
977 | if (ch == '-') { |
978 | rule = CIPHER_DEL; |
979 | l++; |
980 | } else if (ch == '+') { |
981 | rule = CIPHER_ORD; |
982 | l++; |
983 | } else if (ch == '!') { |
984 | rule = CIPHER_KILL; |
985 | l++; |
986 | } else if (ch == '@') { |
987 | rule = CIPHER_SPECIAL; |
988 | l++; |
989 | } else { |
990 | rule = CIPHER_ADD; |
991 | } |
992 | |
993 | if (ITEM_SEP(ch)) { |
994 | l++; |
995 | continue; |
996 | } |
997 | |
998 | alg_mkey = 0; |
999 | alg_auth = 0; |
1000 | alg_enc = 0; |
1001 | alg_mac = 0; |
1002 | min_tls = 0; |
1003 | algo_strength = 0; |
1004 | |
1005 | for (;;) { |
1006 | ch = *l; |
1007 | buf = l; |
1008 | buflen = 0; |
1009 | #ifndef CHARSET_EBCDIC |
1010 | while (((ch >= 'A') && (ch <= 'Z')) || |
1011 | ((ch >= '0') && (ch <= '9')) || |
1012 | ((ch >= 'a') && (ch <= 'z')) || |
1013 | (ch == '-') || (ch == '.') || (ch == '=')) |
1014 | #else |
1015 | while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.') |
1016 | || (ch == '=')) |
1017 | #endif |
1018 | { |
1019 | ch = *(++l); |
1020 | buflen++; |
1021 | } |
1022 | |
1023 | if (buflen == 0) { |
1024 | /* |
1025 | * We hit something we cannot deal with, |
1026 | * it is no command or separator nor |
1027 | * alphanumeric, so we call this an error. |
1028 | */ |
1029 | SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND); |
1030 | retval = found = 0; |
1031 | l++; |
1032 | break; |
1033 | } |
1034 | |
1035 | if (rule == CIPHER_SPECIAL) { |
1036 | found = 0; /* unused -- avoid compiler warning */ |
1037 | break; /* special treatment */ |
1038 | } |
1039 | |
1040 | /* check for multi-part specification */ |
1041 | if (ch == '+') { |
1042 | multi = 1; |
1043 | l++; |
1044 | } else { |
1045 | multi = 0; |
1046 | } |
1047 | |
1048 | /* |
1049 | * Now search for the cipher alias in the ca_list. Be careful |
1050 | * with the strncmp, because the "buflen" limitation |
1051 | * will make the rule "ADH:SOME" and the cipher |
1052 | * "ADH-MY-CIPHER" look like a match for buflen=3. |
1053 | * So additionally check whether the cipher name found |
1054 | * has the correct length. We can save a strlen() call: |
1055 | * just checking for the '\0' at the right place is |
1056 | * sufficient, we have to strncmp() anyway. (We cannot |
1057 | * use strcmp(), because buf is not '\0' terminated.) |
1058 | */ |
1059 | j = found = 0; |
1060 | cipher_id = 0; |
1061 | while (ca_list[j]) { |
1062 | if (strncmp(buf, ca_list[j]->name, buflen) == 0 |
1063 | && (ca_list[j]->name[buflen] == '\0')) { |
1064 | found = 1; |
1065 | break; |
1066 | } else |
1067 | j++; |
1068 | } |
1069 | |
1070 | if (!found) |
1071 | break; /* ignore this entry */ |
1072 | |
1073 | if (ca_list[j]->algorithm_mkey) { |
1074 | if (alg_mkey) { |
1075 | alg_mkey &= ca_list[j]->algorithm_mkey; |
1076 | if (!alg_mkey) { |
1077 | found = 0; |
1078 | break; |
1079 | } |
1080 | } else { |
1081 | alg_mkey = ca_list[j]->algorithm_mkey; |
1082 | } |
1083 | } |
1084 | |
1085 | if (ca_list[j]->algorithm_auth) { |
1086 | if (alg_auth) { |
1087 | alg_auth &= ca_list[j]->algorithm_auth; |
1088 | if (!alg_auth) { |
1089 | found = 0; |
1090 | break; |
1091 | } |
1092 | } else { |
1093 | alg_auth = ca_list[j]->algorithm_auth; |
1094 | } |
1095 | } |
1096 | |
1097 | if (ca_list[j]->algorithm_enc) { |
1098 | if (alg_enc) { |
1099 | alg_enc &= ca_list[j]->algorithm_enc; |
1100 | if (!alg_enc) { |
1101 | found = 0; |
1102 | break; |
1103 | } |
1104 | } else { |
1105 | alg_enc = ca_list[j]->algorithm_enc; |
1106 | } |
1107 | } |
1108 | |
1109 | if (ca_list[j]->algorithm_mac) { |
1110 | if (alg_mac) { |
1111 | alg_mac &= ca_list[j]->algorithm_mac; |
1112 | if (!alg_mac) { |
1113 | found = 0; |
1114 | break; |
1115 | } |
1116 | } else { |
1117 | alg_mac = ca_list[j]->algorithm_mac; |
1118 | } |
1119 | } |
1120 | |
1121 | if (ca_list[j]->algo_strength & SSL_STRONG_MASK) { |
1122 | if (algo_strength & SSL_STRONG_MASK) { |
1123 | algo_strength &= |
1124 | (ca_list[j]->algo_strength & SSL_STRONG_MASK) | |
1125 | ~SSL_STRONG_MASK; |
1126 | if (!(algo_strength & SSL_STRONG_MASK)) { |
1127 | found = 0; |
1128 | break; |
1129 | } |
1130 | } else { |
1131 | algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK; |
1132 | } |
1133 | } |
1134 | |
1135 | if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) { |
1136 | if (algo_strength & SSL_DEFAULT_MASK) { |
1137 | algo_strength &= |
1138 | (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) | |
1139 | ~SSL_DEFAULT_MASK; |
1140 | if (!(algo_strength & SSL_DEFAULT_MASK)) { |
1141 | found = 0; |
1142 | break; |
1143 | } |
1144 | } else { |
1145 | algo_strength |= |
1146 | ca_list[j]->algo_strength & SSL_DEFAULT_MASK; |
1147 | } |
1148 | } |
1149 | |
1150 | if (ca_list[j]->valid) { |
1151 | /* |
1152 | * explicit ciphersuite found; its protocol version does not |
1153 | * become part of the search pattern! |
1154 | */ |
1155 | |
1156 | cipher_id = ca_list[j]->id; |
1157 | } else { |
1158 | /* |
1159 | * not an explicit ciphersuite; only in this case, the |
1160 | * protocol version is considered part of the search pattern |
1161 | */ |
1162 | |
1163 | if (ca_list[j]->min_tls) { |
1164 | if (min_tls != 0 && min_tls != ca_list[j]->min_tls) { |
1165 | found = 0; |
1166 | break; |
1167 | } else { |
1168 | min_tls = ca_list[j]->min_tls; |
1169 | } |
1170 | } |
1171 | } |
1172 | |
1173 | if (!multi) |
1174 | break; |
1175 | } |
1176 | |
1177 | /* |
1178 | * Ok, we have the rule, now apply it |
1179 | */ |
1180 | if (rule == CIPHER_SPECIAL) { /* special command */ |
1181 | ok = 0; |
1182 | if ((buflen == 8) && strncmp(buf, "STRENGTH" , 8) == 0) { |
1183 | ok = ssl_cipher_strength_sort(head_p, tail_p); |
1184 | } else if (buflen == 10 && strncmp(buf, "SECLEVEL=" , 9) == 0) { |
1185 | int level = buf[9] - '0'; |
1186 | if (level < 0 || level > 5) { |
1187 | SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, |
1188 | SSL_R_INVALID_COMMAND); |
1189 | } else { |
1190 | c->sec_level = level; |
1191 | ok = 1; |
1192 | } |
1193 | } else { |
1194 | SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, SSL_R_INVALID_COMMAND); |
1195 | } |
1196 | if (ok == 0) |
1197 | retval = 0; |
1198 | /* |
1199 | * We do not support any "multi" options |
1200 | * together with "@", so throw away the |
1201 | * rest of the command, if any left, until |
1202 | * end or ':' is found. |
1203 | */ |
1204 | while ((*l != '\0') && !ITEM_SEP(*l)) |
1205 | l++; |
1206 | } else if (found) { |
1207 | ssl_cipher_apply_rule(cipher_id, |
1208 | alg_mkey, alg_auth, alg_enc, alg_mac, |
1209 | min_tls, algo_strength, rule, -1, head_p, |
1210 | tail_p); |
1211 | } else { |
1212 | while ((*l != '\0') && !ITEM_SEP(*l)) |
1213 | l++; |
1214 | } |
1215 | if (*l == '\0') |
1216 | break; /* done */ |
1217 | } |
1218 | |
1219 | return retval; |
1220 | } |
1221 | |
1222 | #ifndef OPENSSL_NO_EC |
1223 | static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c, |
1224 | const char **prule_str) |
1225 | { |
1226 | unsigned int suiteb_flags = 0, suiteb_comb2 = 0; |
1227 | if (strncmp(*prule_str, "SUITEB128ONLY" , 13) == 0) { |
1228 | suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY; |
1229 | } else if (strncmp(*prule_str, "SUITEB128C2" , 11) == 0) { |
1230 | suiteb_comb2 = 1; |
1231 | suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; |
1232 | } else if (strncmp(*prule_str, "SUITEB128" , 9) == 0) { |
1233 | suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS; |
1234 | } else if (strncmp(*prule_str, "SUITEB192" , 9) == 0) { |
1235 | suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS; |
1236 | } |
1237 | |
1238 | if (suiteb_flags) { |
1239 | c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS; |
1240 | c->cert_flags |= suiteb_flags; |
1241 | } else { |
1242 | suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS; |
1243 | } |
1244 | |
1245 | if (!suiteb_flags) |
1246 | return 1; |
1247 | /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */ |
1248 | |
1249 | if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) { |
1250 | SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, |
1251 | SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE); |
1252 | return 0; |
1253 | } |
1254 | # ifndef OPENSSL_NO_EC |
1255 | switch (suiteb_flags) { |
1256 | case SSL_CERT_FLAG_SUITEB_128_LOS: |
1257 | if (suiteb_comb2) |
1258 | *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384" ; |
1259 | else |
1260 | *prule_str = |
1261 | "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384" ; |
1262 | break; |
1263 | case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY: |
1264 | *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256" ; |
1265 | break; |
1266 | case SSL_CERT_FLAG_SUITEB_192_LOS: |
1267 | *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384" ; |
1268 | break; |
1269 | } |
1270 | return 1; |
1271 | # else |
1272 | SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST, SSL_R_ECDH_REQUIRED_FOR_SUITEB_MODE); |
1273 | return 0; |
1274 | # endif |
1275 | } |
1276 | #endif |
1277 | |
1278 | static int ciphersuite_cb(const char *elem, int len, void *arg) |
1279 | { |
1280 | STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg; |
1281 | const SSL_CIPHER *cipher; |
1282 | /* Arbitrary sized temp buffer for the cipher name. Should be big enough */ |
1283 | char name[80]; |
1284 | |
1285 | if (len > (int)(sizeof(name) - 1)) { |
1286 | SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH); |
1287 | return 0; |
1288 | } |
1289 | |
1290 | memcpy(name, elem, len); |
1291 | name[len] = '\0'; |
1292 | |
1293 | cipher = ssl3_get_cipher_by_std_name(name); |
1294 | if (cipher == NULL) { |
1295 | SSLerr(SSL_F_CIPHERSUITE_CB, SSL_R_NO_CIPHER_MATCH); |
1296 | return 0; |
1297 | } |
1298 | |
1299 | if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) { |
1300 | SSLerr(SSL_F_CIPHERSUITE_CB, ERR_R_INTERNAL_ERROR); |
1301 | return 0; |
1302 | } |
1303 | |
1304 | return 1; |
1305 | } |
1306 | |
1307 | static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str) |
1308 | { |
1309 | STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null(); |
1310 | |
1311 | if (newciphers == NULL) |
1312 | return 0; |
1313 | |
1314 | /* Parse the list. We explicitly allow an empty list */ |
1315 | if (*str != '\0' |
1316 | && !CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers)) { |
1317 | sk_SSL_CIPHER_free(newciphers); |
1318 | return 0; |
1319 | } |
1320 | sk_SSL_CIPHER_free(*currciphers); |
1321 | *currciphers = newciphers; |
1322 | |
1323 | return 1; |
1324 | } |
1325 | |
1326 | static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id, |
1327 | STACK_OF(SSL_CIPHER) *cipherstack) |
1328 | { |
1329 | STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); |
1330 | |
1331 | if (tmp_cipher_list == NULL) { |
1332 | return 0; |
1333 | } |
1334 | |
1335 | sk_SSL_CIPHER_free(*cipher_list_by_id); |
1336 | *cipher_list_by_id = tmp_cipher_list; |
1337 | |
1338 | (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp); |
1339 | sk_SSL_CIPHER_sort(*cipher_list_by_id); |
1340 | |
1341 | return 1; |
1342 | } |
1343 | |
1344 | static int update_cipher_list(STACK_OF(SSL_CIPHER) **cipher_list, |
1345 | STACK_OF(SSL_CIPHER) **cipher_list_by_id, |
1346 | STACK_OF(SSL_CIPHER) *tls13_ciphersuites) |
1347 | { |
1348 | int i; |
1349 | STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list); |
1350 | |
1351 | if (tmp_cipher_list == NULL) |
1352 | return 0; |
1353 | |
1354 | /* |
1355 | * Delete any existing TLSv1.3 ciphersuites. These are always first in the |
1356 | * list. |
1357 | */ |
1358 | while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0 |
1359 | && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls |
1360 | == TLS1_3_VERSION) |
1361 | sk_SSL_CIPHER_delete(tmp_cipher_list, 0); |
1362 | |
1363 | /* Insert the new TLSv1.3 ciphersuites */ |
1364 | for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) |
1365 | sk_SSL_CIPHER_insert(tmp_cipher_list, |
1366 | sk_SSL_CIPHER_value(tls13_ciphersuites, i), i); |
1367 | |
1368 | if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) |
1369 | return 0; |
1370 | |
1371 | sk_SSL_CIPHER_free(*cipher_list); |
1372 | *cipher_list = tmp_cipher_list; |
1373 | |
1374 | return 1; |
1375 | } |
1376 | |
1377 | int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str) |
1378 | { |
1379 | int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str); |
1380 | |
1381 | if (ret && ctx->cipher_list != NULL) |
1382 | return update_cipher_list(&ctx->cipher_list, &ctx->cipher_list_by_id, |
1383 | ctx->tls13_ciphersuites); |
1384 | |
1385 | return ret; |
1386 | } |
1387 | |
1388 | int SSL_set_ciphersuites(SSL *s, const char *str) |
1389 | { |
1390 | STACK_OF(SSL_CIPHER) *cipher_list; |
1391 | int ret = set_ciphersuites(&(s->tls13_ciphersuites), str); |
1392 | |
1393 | if (s->cipher_list == NULL) { |
1394 | if ((cipher_list = SSL_get_ciphers(s)) != NULL) |
1395 | s->cipher_list = sk_SSL_CIPHER_dup(cipher_list); |
1396 | } |
1397 | if (ret && s->cipher_list != NULL) |
1398 | return update_cipher_list(&s->cipher_list, &s->cipher_list_by_id, |
1399 | s->tls13_ciphersuites); |
1400 | |
1401 | return ret; |
1402 | } |
1403 | |
1404 | STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, |
1405 | STACK_OF(SSL_CIPHER) *tls13_ciphersuites, |
1406 | STACK_OF(SSL_CIPHER) **cipher_list, |
1407 | STACK_OF(SSL_CIPHER) **cipher_list_by_id, |
1408 | const char *rule_str, |
1409 | CERT *c) |
1410 | { |
1411 | int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i; |
1412 | uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac; |
1413 | STACK_OF(SSL_CIPHER) *cipherstack; |
1414 | const char *rule_p; |
1415 | CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; |
1416 | const SSL_CIPHER **ca_list = NULL; |
1417 | |
1418 | /* |
1419 | * Return with error if nothing to do. |
1420 | */ |
1421 | if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) |
1422 | return NULL; |
1423 | #ifndef OPENSSL_NO_EC |
1424 | if (!check_suiteb_cipher_list(ssl_method, c, &rule_str)) |
1425 | return NULL; |
1426 | #endif |
1427 | |
1428 | /* |
1429 | * To reduce the work to do we only want to process the compiled |
1430 | * in algorithms, so we first get the mask of disabled ciphers. |
1431 | */ |
1432 | |
1433 | disabled_mkey = disabled_mkey_mask; |
1434 | disabled_auth = disabled_auth_mask; |
1435 | disabled_enc = disabled_enc_mask; |
1436 | disabled_mac = disabled_mac_mask; |
1437 | |
1438 | /* |
1439 | * Now we have to collect the available ciphers from the compiled |
1440 | * in ciphers. We cannot get more than the number compiled in, so |
1441 | * it is used for allocation. |
1442 | */ |
1443 | num_of_ciphers = ssl_method->num_ciphers(); |
1444 | |
1445 | co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers); |
1446 | if (co_list == NULL) { |
1447 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); |
1448 | return NULL; /* Failure */ |
1449 | } |
1450 | |
1451 | ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, |
1452 | disabled_mkey, disabled_auth, disabled_enc, |
1453 | disabled_mac, co_list, &head, &tail); |
1454 | |
1455 | /* Now arrange all ciphers by preference. */ |
1456 | |
1457 | /* |
1458 | * Everything else being equal, prefer ephemeral ECDH over other key |
1459 | * exchange mechanisms. |
1460 | * For consistency, prefer ECDSA over RSA (though this only matters if the |
1461 | * server has both certificates, and is using the DEFAULT, or a client |
1462 | * preference). |
1463 | */ |
1464 | ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD, |
1465 | -1, &head, &tail); |
1466 | ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, |
1467 | &tail); |
1468 | ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, |
1469 | &tail); |
1470 | |
1471 | /* Within each strength group, we prefer GCM over CHACHA... */ |
1472 | ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1, |
1473 | &head, &tail); |
1474 | ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1, |
1475 | &head, &tail); |
1476 | |
1477 | /* |
1478 | * ...and generally, our preferred cipher is AES. |
1479 | * Note that AEADs will be bumped to take preference after sorting by |
1480 | * strength. |
1481 | */ |
1482 | ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD, |
1483 | -1, &head, &tail); |
1484 | |
1485 | /* Temporarily enable everything else for sorting */ |
1486 | ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail); |
1487 | |
1488 | /* Low priority for MD5 */ |
1489 | ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, |
1490 | &tail); |
1491 | |
1492 | /* |
1493 | * Move anonymous ciphers to the end. Usually, these will remain |
1494 | * disabled. (For applications that allow them, they aren't too bad, but |
1495 | * we prefer authenticated ciphers.) |
1496 | */ |
1497 | ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, |
1498 | &tail); |
1499 | |
1500 | ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, |
1501 | &tail); |
1502 | ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, |
1503 | &tail); |
1504 | |
1505 | /* RC4 is sort-of broken -- move to the end */ |
1506 | ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, |
1507 | &tail); |
1508 | |
1509 | /* |
1510 | * Now sort by symmetric encryption strength. The above ordering remains |
1511 | * in force within each class |
1512 | */ |
1513 | if (!ssl_cipher_strength_sort(&head, &tail)) { |
1514 | OPENSSL_free(co_list); |
1515 | return NULL; |
1516 | } |
1517 | |
1518 | /* |
1519 | * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs. |
1520 | * TODO(openssl-team): is there an easier way to accomplish all this? |
1521 | */ |
1522 | ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1, |
1523 | &head, &tail); |
1524 | |
1525 | /* |
1526 | * Irrespective of strength, enforce the following order: |
1527 | * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest. |
1528 | * Within each group, ciphers remain sorted by strength and previous |
1529 | * preference, i.e., |
1530 | * 1) ECDHE > DHE |
1531 | * 2) GCM > CHACHA |
1532 | * 3) AES > rest |
1533 | * 4) TLS 1.2 > legacy |
1534 | * |
1535 | * Because we now bump ciphers to the top of the list, we proceed in |
1536 | * reverse order of preference. |
1537 | */ |
1538 | ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1, |
1539 | &head, &tail); |
1540 | ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0, |
1541 | CIPHER_BUMP, -1, &head, &tail); |
1542 | ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0, |
1543 | CIPHER_BUMP, -1, &head, &tail); |
1544 | |
1545 | /* Now disable everything (maintaining the ordering!) */ |
1546 | ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail); |
1547 | |
1548 | /* |
1549 | * We also need cipher aliases for selecting based on the rule_str. |
1550 | * There might be two types of entries in the rule_str: 1) names |
1551 | * of ciphers themselves 2) aliases for groups of ciphers. |
1552 | * For 1) we need the available ciphers and for 2) the cipher |
1553 | * groups of cipher_aliases added together in one list (otherwise |
1554 | * we would be happy with just the cipher_aliases table). |
1555 | */ |
1556 | num_of_group_aliases = OSSL_NELEM(cipher_aliases); |
1557 | num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; |
1558 | ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max); |
1559 | if (ca_list == NULL) { |
1560 | OPENSSL_free(co_list); |
1561 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE); |
1562 | return NULL; /* Failure */ |
1563 | } |
1564 | ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, |
1565 | disabled_mkey, disabled_auth, disabled_enc, |
1566 | disabled_mac, head); |
1567 | |
1568 | /* |
1569 | * If the rule_string begins with DEFAULT, apply the default rule |
1570 | * before using the (possibly available) additional rules. |
1571 | */ |
1572 | ok = 1; |
1573 | rule_p = rule_str; |
1574 | if (strncmp(rule_str, "DEFAULT" , 7) == 0) { |
1575 | ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(), |
1576 | &head, &tail, ca_list, c); |
1577 | rule_p += 7; |
1578 | if (*rule_p == ':') |
1579 | rule_p++; |
1580 | } |
1581 | |
1582 | if (ok && (rule_p[0] != '\0')) |
1583 | ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c); |
1584 | |
1585 | OPENSSL_free(ca_list); /* Not needed anymore */ |
1586 | |
1587 | if (!ok) { /* Rule processing failure */ |
1588 | OPENSSL_free(co_list); |
1589 | return NULL; |
1590 | } |
1591 | |
1592 | /* |
1593 | * Allocate new "cipherstack" for the result, return with error |
1594 | * if we cannot get one. |
1595 | */ |
1596 | if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) { |
1597 | OPENSSL_free(co_list); |
1598 | return NULL; |
1599 | } |
1600 | |
1601 | /* Add TLSv1.3 ciphers first - we always prefer those if possible */ |
1602 | for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) { |
1603 | if (!sk_SSL_CIPHER_push(cipherstack, |
1604 | sk_SSL_CIPHER_value(tls13_ciphersuites, i))) { |
1605 | sk_SSL_CIPHER_free(cipherstack); |
1606 | return NULL; |
1607 | } |
1608 | } |
1609 | |
1610 | OSSL_TRACE_BEGIN(TLS_CIPHER) { |
1611 | BIO_printf(trc_out, "cipher selection:\n" ); |
1612 | } |
1613 | /* |
1614 | * The cipher selection for the list is done. The ciphers are added |
1615 | * to the resulting precedence to the STACK_OF(SSL_CIPHER). |
1616 | */ |
1617 | for (curr = head; curr != NULL; curr = curr->next) { |
1618 | if (curr->active) { |
1619 | if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) { |
1620 | OPENSSL_free(co_list); |
1621 | sk_SSL_CIPHER_free(cipherstack); |
1622 | OSSL_TRACE_CANCEL(TLS_CIPHER); |
1623 | return NULL; |
1624 | } |
1625 | if (trc_out != NULL) |
1626 | BIO_printf(trc_out, "<%s>\n" , curr->cipher->name); |
1627 | } |
1628 | } |
1629 | OPENSSL_free(co_list); /* Not needed any longer */ |
1630 | OSSL_TRACE_END(TLS_CIPHER); |
1631 | |
1632 | if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) { |
1633 | sk_SSL_CIPHER_free(cipherstack); |
1634 | return NULL; |
1635 | } |
1636 | sk_SSL_CIPHER_free(*cipher_list); |
1637 | *cipher_list = cipherstack; |
1638 | |
1639 | return cipherstack; |
1640 | } |
1641 | |
1642 | char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len) |
1643 | { |
1644 | const char *ver; |
1645 | const char *kx, *au, *enc, *mac; |
1646 | uint32_t alg_mkey, alg_auth, alg_enc, alg_mac; |
1647 | static const char *format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-9s Mac=%-4s\n" ; |
1648 | |
1649 | if (buf == NULL) { |
1650 | len = 128; |
1651 | if ((buf = OPENSSL_malloc(len)) == NULL) { |
1652 | SSLerr(SSL_F_SSL_CIPHER_DESCRIPTION, ERR_R_MALLOC_FAILURE); |
1653 | return NULL; |
1654 | } |
1655 | } else if (len < 128) { |
1656 | return NULL; |
1657 | } |
1658 | |
1659 | alg_mkey = cipher->algorithm_mkey; |
1660 | alg_auth = cipher->algorithm_auth; |
1661 | alg_enc = cipher->algorithm_enc; |
1662 | alg_mac = cipher->algorithm_mac; |
1663 | |
1664 | ver = ssl_protocol_to_string(cipher->min_tls); |
1665 | |
1666 | switch (alg_mkey) { |
1667 | case SSL_kRSA: |
1668 | kx = "RSA" ; |
1669 | break; |
1670 | case SSL_kDHE: |
1671 | kx = "DH" ; |
1672 | break; |
1673 | case SSL_kECDHE: |
1674 | kx = "ECDH" ; |
1675 | break; |
1676 | case SSL_kPSK: |
1677 | kx = "PSK" ; |
1678 | break; |
1679 | case SSL_kRSAPSK: |
1680 | kx = "RSAPSK" ; |
1681 | break; |
1682 | case SSL_kECDHEPSK: |
1683 | kx = "ECDHEPSK" ; |
1684 | break; |
1685 | case SSL_kDHEPSK: |
1686 | kx = "DHEPSK" ; |
1687 | break; |
1688 | case SSL_kSRP: |
1689 | kx = "SRP" ; |
1690 | break; |
1691 | case SSL_kGOST: |
1692 | kx = "GOST" ; |
1693 | break; |
1694 | case SSL_kANY: |
1695 | kx = "any" ; |
1696 | break; |
1697 | default: |
1698 | kx = "unknown" ; |
1699 | } |
1700 | |
1701 | switch (alg_auth) { |
1702 | case SSL_aRSA: |
1703 | au = "RSA" ; |
1704 | break; |
1705 | case SSL_aDSS: |
1706 | au = "DSS" ; |
1707 | break; |
1708 | case SSL_aNULL: |
1709 | au = "None" ; |
1710 | break; |
1711 | case SSL_aECDSA: |
1712 | au = "ECDSA" ; |
1713 | break; |
1714 | case SSL_aPSK: |
1715 | au = "PSK" ; |
1716 | break; |
1717 | case SSL_aSRP: |
1718 | au = "SRP" ; |
1719 | break; |
1720 | case SSL_aGOST01: |
1721 | au = "GOST01" ; |
1722 | break; |
1723 | /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */ |
1724 | case (SSL_aGOST12 | SSL_aGOST01): |
1725 | au = "GOST12" ; |
1726 | break; |
1727 | case SSL_aANY: |
1728 | au = "any" ; |
1729 | break; |
1730 | default: |
1731 | au = "unknown" ; |
1732 | break; |
1733 | } |
1734 | |
1735 | switch (alg_enc) { |
1736 | case SSL_DES: |
1737 | enc = "DES(56)" ; |
1738 | break; |
1739 | case SSL_3DES: |
1740 | enc = "3DES(168)" ; |
1741 | break; |
1742 | case SSL_RC4: |
1743 | enc = "RC4(128)" ; |
1744 | break; |
1745 | case SSL_RC2: |
1746 | enc = "RC2(128)" ; |
1747 | break; |
1748 | case SSL_IDEA: |
1749 | enc = "IDEA(128)" ; |
1750 | break; |
1751 | case SSL_eNULL: |
1752 | enc = "None" ; |
1753 | break; |
1754 | case SSL_AES128: |
1755 | enc = "AES(128)" ; |
1756 | break; |
1757 | case SSL_AES256: |
1758 | enc = "AES(256)" ; |
1759 | break; |
1760 | case SSL_AES128GCM: |
1761 | enc = "AESGCM(128)" ; |
1762 | break; |
1763 | case SSL_AES256GCM: |
1764 | enc = "AESGCM(256)" ; |
1765 | break; |
1766 | case SSL_AES128CCM: |
1767 | enc = "AESCCM(128)" ; |
1768 | break; |
1769 | case SSL_AES256CCM: |
1770 | enc = "AESCCM(256)" ; |
1771 | break; |
1772 | case SSL_AES128CCM8: |
1773 | enc = "AESCCM8(128)" ; |
1774 | break; |
1775 | case SSL_AES256CCM8: |
1776 | enc = "AESCCM8(256)" ; |
1777 | break; |
1778 | case SSL_CAMELLIA128: |
1779 | enc = "Camellia(128)" ; |
1780 | break; |
1781 | case SSL_CAMELLIA256: |
1782 | enc = "Camellia(256)" ; |
1783 | break; |
1784 | case SSL_ARIA128GCM: |
1785 | enc = "ARIAGCM(128)" ; |
1786 | break; |
1787 | case SSL_ARIA256GCM: |
1788 | enc = "ARIAGCM(256)" ; |
1789 | break; |
1790 | case SSL_SEED: |
1791 | enc = "SEED(128)" ; |
1792 | break; |
1793 | case SSL_eGOST2814789CNT: |
1794 | case SSL_eGOST2814789CNT12: |
1795 | enc = "GOST89(256)" ; |
1796 | break; |
1797 | case SSL_CHACHA20POLY1305: |
1798 | enc = "CHACHA20/POLY1305(256)" ; |
1799 | break; |
1800 | default: |
1801 | enc = "unknown" ; |
1802 | break; |
1803 | } |
1804 | |
1805 | switch (alg_mac) { |
1806 | case SSL_MD5: |
1807 | mac = "MD5" ; |
1808 | break; |
1809 | case SSL_SHA1: |
1810 | mac = "SHA1" ; |
1811 | break; |
1812 | case SSL_SHA256: |
1813 | mac = "SHA256" ; |
1814 | break; |
1815 | case SSL_SHA384: |
1816 | mac = "SHA384" ; |
1817 | break; |
1818 | case SSL_AEAD: |
1819 | mac = "AEAD" ; |
1820 | break; |
1821 | case SSL_GOST89MAC: |
1822 | case SSL_GOST89MAC12: |
1823 | mac = "GOST89" ; |
1824 | break; |
1825 | case SSL_GOST94: |
1826 | mac = "GOST94" ; |
1827 | break; |
1828 | case SSL_GOST12_256: |
1829 | case SSL_GOST12_512: |
1830 | mac = "GOST2012" ; |
1831 | break; |
1832 | default: |
1833 | mac = "unknown" ; |
1834 | break; |
1835 | } |
1836 | |
1837 | BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac); |
1838 | |
1839 | return buf; |
1840 | } |
1841 | |
1842 | const char *SSL_CIPHER_get_version(const SSL_CIPHER *c) |
1843 | { |
1844 | if (c == NULL) |
1845 | return "(NONE)" ; |
1846 | |
1847 | /* |
1848 | * Backwards-compatibility crutch. In almost all contexts we report TLS |
1849 | * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0". |
1850 | */ |
1851 | if (c->min_tls == TLS1_VERSION) |
1852 | return "TLSv1.0" ; |
1853 | return ssl_protocol_to_string(c->min_tls); |
1854 | } |
1855 | |
1856 | /* return the actual cipher being used */ |
1857 | const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) |
1858 | { |
1859 | if (c != NULL) |
1860 | return c->name; |
1861 | return "(NONE)" ; |
1862 | } |
1863 | |
1864 | /* return the actual cipher being used in RFC standard name */ |
1865 | const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c) |
1866 | { |
1867 | if (c != NULL) |
1868 | return c->stdname; |
1869 | return "(NONE)" ; |
1870 | } |
1871 | |
1872 | /* return the OpenSSL name based on given RFC standard name */ |
1873 | const char *OPENSSL_cipher_name(const char *stdname) |
1874 | { |
1875 | const SSL_CIPHER *c; |
1876 | |
1877 | if (stdname == NULL) |
1878 | return "(NONE)" ; |
1879 | c = ssl3_get_cipher_by_std_name(stdname); |
1880 | return SSL_CIPHER_get_name(c); |
1881 | } |
1882 | |
1883 | /* number of bits for symmetric cipher */ |
1884 | int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) |
1885 | { |
1886 | int ret = 0; |
1887 | |
1888 | if (c != NULL) { |
1889 | if (alg_bits != NULL) |
1890 | *alg_bits = (int)c->alg_bits; |
1891 | ret = (int)c->strength_bits; |
1892 | } |
1893 | return ret; |
1894 | } |
1895 | |
1896 | uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c) |
1897 | { |
1898 | return c->id; |
1899 | } |
1900 | |
1901 | uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c) |
1902 | { |
1903 | return c->id & 0xFFFF; |
1904 | } |
1905 | |
1906 | SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) |
1907 | { |
1908 | SSL_COMP *ctmp; |
1909 | int i, nn; |
1910 | |
1911 | if ((n == 0) || (sk == NULL)) |
1912 | return NULL; |
1913 | nn = sk_SSL_COMP_num(sk); |
1914 | for (i = 0; i < nn; i++) { |
1915 | ctmp = sk_SSL_COMP_value(sk, i); |
1916 | if (ctmp->id == n) |
1917 | return ctmp; |
1918 | } |
1919 | return NULL; |
1920 | } |
1921 | |
1922 | #ifdef OPENSSL_NO_COMP |
1923 | STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) |
1924 | { |
1925 | return NULL; |
1926 | } |
1927 | |
1928 | STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) |
1929 | *meths) |
1930 | { |
1931 | return meths; |
1932 | } |
1933 | |
1934 | int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) |
1935 | { |
1936 | return 1; |
1937 | } |
1938 | |
1939 | #else |
1940 | STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) |
1941 | { |
1942 | load_builtin_compressions(); |
1943 | return ssl_comp_methods; |
1944 | } |
1945 | |
1946 | STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) |
1947 | *meths) |
1948 | { |
1949 | STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; |
1950 | ssl_comp_methods = meths; |
1951 | return old_meths; |
1952 | } |
1953 | |
1954 | static void cmeth_free(SSL_COMP *cm) |
1955 | { |
1956 | OPENSSL_free(cm); |
1957 | } |
1958 | |
1959 | void ssl_comp_free_compression_methods_int(void) |
1960 | { |
1961 | STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods; |
1962 | ssl_comp_methods = NULL; |
1963 | sk_SSL_COMP_pop_free(old_meths, cmeth_free); |
1964 | } |
1965 | |
1966 | int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) |
1967 | { |
1968 | SSL_COMP *comp; |
1969 | |
1970 | if (cm == NULL || COMP_get_type(cm) == NID_undef) |
1971 | return 1; |
1972 | |
1973 | /*- |
1974 | * According to draft-ietf-tls-compression-04.txt, the |
1975 | * compression number ranges should be the following: |
1976 | * |
1977 | * 0 to 63: methods defined by the IETF |
1978 | * 64 to 192: external party methods assigned by IANA |
1979 | * 193 to 255: reserved for private use |
1980 | */ |
1981 | if (id < 193 || id > 255) { |
1982 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, |
1983 | SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); |
1984 | return 1; |
1985 | } |
1986 | |
1987 | comp = OPENSSL_malloc(sizeof(*comp)); |
1988 | if (comp == NULL) { |
1989 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); |
1990 | return 1; |
1991 | } |
1992 | |
1993 | comp->id = id; |
1994 | comp->method = cm; |
1995 | load_builtin_compressions(); |
1996 | if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) { |
1997 | OPENSSL_free(comp); |
1998 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, |
1999 | SSL_R_DUPLICATE_COMPRESSION_ID); |
2000 | return 1; |
2001 | } |
2002 | if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) { |
2003 | OPENSSL_free(comp); |
2004 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE); |
2005 | return 1; |
2006 | } |
2007 | return 0; |
2008 | } |
2009 | #endif |
2010 | |
2011 | const char *SSL_COMP_get_name(const COMP_METHOD *comp) |
2012 | { |
2013 | #ifndef OPENSSL_NO_COMP |
2014 | return comp ? COMP_get_name(comp) : NULL; |
2015 | #else |
2016 | return NULL; |
2017 | #endif |
2018 | } |
2019 | |
2020 | const char *SSL_COMP_get0_name(const SSL_COMP *comp) |
2021 | { |
2022 | #ifndef OPENSSL_NO_COMP |
2023 | return comp->name; |
2024 | #else |
2025 | return NULL; |
2026 | #endif |
2027 | } |
2028 | |
2029 | int SSL_COMP_get_id(const SSL_COMP *comp) |
2030 | { |
2031 | #ifndef OPENSSL_NO_COMP |
2032 | return comp->id; |
2033 | #else |
2034 | return -1; |
2035 | #endif |
2036 | } |
2037 | |
2038 | const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr, |
2039 | int all) |
2040 | { |
2041 | const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr); |
2042 | |
2043 | if (c == NULL || (!all && c->valid == 0)) |
2044 | return NULL; |
2045 | return c; |
2046 | } |
2047 | |
2048 | const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr) |
2049 | { |
2050 | return ssl->method->get_cipher_by_char(ptr); |
2051 | } |
2052 | |
2053 | int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c) |
2054 | { |
2055 | int i; |
2056 | if (c == NULL) |
2057 | return NID_undef; |
2058 | i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc); |
2059 | if (i == -1) |
2060 | return NID_undef; |
2061 | return ssl_cipher_table_cipher[i].nid; |
2062 | } |
2063 | |
2064 | int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c) |
2065 | { |
2066 | int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac); |
2067 | |
2068 | if (i == -1) |
2069 | return NID_undef; |
2070 | return ssl_cipher_table_mac[i].nid; |
2071 | } |
2072 | |
2073 | int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c) |
2074 | { |
2075 | int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey); |
2076 | |
2077 | if (i == -1) |
2078 | return NID_undef; |
2079 | return ssl_cipher_table_kx[i].nid; |
2080 | } |
2081 | |
2082 | int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c) |
2083 | { |
2084 | int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth); |
2085 | |
2086 | if (i == -1) |
2087 | return NID_undef; |
2088 | return ssl_cipher_table_auth[i].nid; |
2089 | } |
2090 | |
2091 | const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c) |
2092 | { |
2093 | int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK; |
2094 | |
2095 | if (idx < 0 || idx >= SSL_MD_NUM_IDX) |
2096 | return NULL; |
2097 | return ssl_digest_methods[idx]; |
2098 | } |
2099 | |
2100 | int SSL_CIPHER_is_aead(const SSL_CIPHER *c) |
2101 | { |
2102 | return (c->algorithm_mac & SSL_AEAD) ? 1 : 0; |
2103 | } |
2104 | |
2105 | int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead, |
2106 | size_t *int_overhead, size_t *blocksize, |
2107 | size_t *ext_overhead) |
2108 | { |
2109 | size_t mac = 0, in = 0, blk = 0, out = 0; |
2110 | |
2111 | /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead |
2112 | * because there are no handy #defines for those. */ |
2113 | if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) { |
2114 | out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; |
2115 | } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) { |
2116 | out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16; |
2117 | } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) { |
2118 | out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8; |
2119 | } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) { |
2120 | out = 16; |
2121 | } else if (c->algorithm_mac & SSL_AEAD) { |
2122 | /* We're supposed to have handled all the AEAD modes above */ |
2123 | return 0; |
2124 | } else { |
2125 | /* Non-AEAD modes. Calculate MAC/cipher overhead separately */ |
2126 | int digest_nid = SSL_CIPHER_get_digest_nid(c); |
2127 | const EVP_MD *e_md = EVP_get_digestbynid(digest_nid); |
2128 | |
2129 | if (e_md == NULL) |
2130 | return 0; |
2131 | |
2132 | mac = EVP_MD_size(e_md); |
2133 | if (c->algorithm_enc != SSL_eNULL) { |
2134 | int cipher_nid = SSL_CIPHER_get_cipher_nid(c); |
2135 | const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid); |
2136 | |
2137 | /* If it wasn't AEAD or SSL_eNULL, we expect it to be a |
2138 | known CBC cipher. */ |
2139 | if (e_ciph == NULL || |
2140 | EVP_CIPHER_mode(e_ciph) != EVP_CIPH_CBC_MODE) |
2141 | return 0; |
2142 | |
2143 | in = 1; /* padding length byte */ |
2144 | out = EVP_CIPHER_iv_length(e_ciph); |
2145 | blk = EVP_CIPHER_block_size(e_ciph); |
2146 | } |
2147 | } |
2148 | |
2149 | *mac_overhead = mac; |
2150 | *int_overhead = in; |
2151 | *blocksize = blk; |
2152 | *ext_overhead = out; |
2153 | |
2154 | return 1; |
2155 | } |
2156 | |
2157 | int ssl_cert_is_disabled(size_t idx) |
2158 | { |
2159 | const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx); |
2160 | |
2161 | if (cl == NULL || (cl->amask & disabled_auth_mask) != 0) |
2162 | return 1; |
2163 | return 0; |
2164 | } |
2165 | |
2166 | /* |
2167 | * Default list of TLSv1.2 (and earlier) ciphers |
2168 | * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0 |
2169 | * Update both macro and function simultaneously |
2170 | */ |
2171 | const char *OSSL_default_cipher_list(void) |
2172 | { |
2173 | return "ALL:!COMPLEMENTOFDEFAULT:!eNULL" ; |
2174 | } |
2175 | |
2176 | /* |
2177 | * Default list of TLSv1.3 (and later) ciphers |
2178 | * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0 |
2179 | * Update both macro and function simultaneously |
2180 | */ |
2181 | const char *OSSL_default_ciphersuites(void) |
2182 | { |
2183 | return "TLS_AES_256_GCM_SHA384:" |
2184 | #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305) |
2185 | "TLS_CHACHA20_POLY1305_SHA256:" |
2186 | #endif |
2187 | "TLS_AES_128_GCM_SHA256" ; |
2188 | } |
2189 | |