1 /*
2 * Copyright 1995-2021 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 /* NB: make sure indices in these tables match values above */
26
27 typedef struct {
28 uint32_t mask;
29 int nid;
30 } ssl_cipher_table;
31
32 /* Table of NIDs for each cipher */
33 static const ssl_cipher_table ssl_cipher_table_cipher[SSL_ENC_NUM_IDX] = {
34 {SSL_DES, NID_des_cbc}, /* SSL_ENC_DES_IDX 0 */
35 {SSL_3DES, NID_des_ede3_cbc}, /* SSL_ENC_3DES_IDX 1 */
36 {SSL_RC4, NID_rc4}, /* SSL_ENC_RC4_IDX 2 */
37 {SSL_RC2, NID_rc2_cbc}, /* SSL_ENC_RC2_IDX 3 */
38 {SSL_IDEA, NID_idea_cbc}, /* SSL_ENC_IDEA_IDX 4 */
39 {SSL_eNULL, NID_undef}, /* SSL_ENC_NULL_IDX 5 */
40 {SSL_AES128, NID_aes_128_cbc}, /* SSL_ENC_AES128_IDX 6 */
41 {SSL_AES256, NID_aes_256_cbc}, /* SSL_ENC_AES256_IDX 7 */
42 {SSL_CAMELLIA128, NID_camellia_128_cbc}, /* SSL_ENC_CAMELLIA128_IDX 8 */
43 {SSL_CAMELLIA256, NID_camellia_256_cbc}, /* SSL_ENC_CAMELLIA256_IDX 9 */
44 {SSL_eGOST2814789CNT, NID_gost89_cnt}, /* SSL_ENC_GOST89_IDX 10 */
45 {SSL_SEED, NID_seed_cbc}, /* SSL_ENC_SEED_IDX 11 */
46 {SSL_AES128GCM, NID_aes_128_gcm}, /* SSL_ENC_AES128GCM_IDX 12 */
47 {SSL_AES256GCM, NID_aes_256_gcm}, /* SSL_ENC_AES256GCM_IDX 13 */
48 {SSL_AES128CCM, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM_IDX 14 */
49 {SSL_AES256CCM, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM_IDX 15 */
50 {SSL_AES128CCM8, NID_aes_128_ccm}, /* SSL_ENC_AES128CCM8_IDX 16 */
51 {SSL_AES256CCM8, NID_aes_256_ccm}, /* SSL_ENC_AES256CCM8_IDX 17 */
52 {SSL_eGOST2814789CNT12, NID_gost89_cnt_12}, /* SSL_ENC_GOST8912_IDX 18 */
53 {SSL_CHACHA20POLY1305, NID_chacha20_poly1305}, /* SSL_ENC_CHACHA_IDX 19 */
54 {SSL_ARIA128GCM, NID_aria_128_gcm}, /* SSL_ENC_ARIA128GCM_IDX 20 */
55 {SSL_ARIA256GCM, NID_aria_256_gcm}, /* SSL_ENC_ARIA256GCM_IDX 21 */
56 {SSL_MAGMA, NID_magma_ctr_acpkm}, /* SSL_ENC_MAGMA_IDX */
57 {SSL_KUZNYECHIK, NID_kuznyechik_ctr_acpkm}, /* SSL_ENC_KUZNYECHIK_IDX */
58 };
59
60 #define SSL_COMP_NULL_IDX 0
61 #define SSL_COMP_ZLIB_IDX 1
62 #define SSL_COMP_NUM_IDX 2
63
64 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
65
66 #ifndef OPENSSL_NO_COMP
67 static CRYPTO_ONCE ssl_load_builtin_comp_once = CRYPTO_ONCE_STATIC_INIT;
68 #endif
69
70 /* NB: make sure indices in this table matches values above */
71 static const ssl_cipher_table ssl_cipher_table_mac[SSL_MD_NUM_IDX] = {
72 {SSL_MD5, NID_md5}, /* SSL_MD_MD5_IDX 0 */
73 {SSL_SHA1, NID_sha1}, /* SSL_MD_SHA1_IDX 1 */
74 {SSL_GOST94, NID_id_GostR3411_94}, /* SSL_MD_GOST94_IDX 2 */
75 {SSL_GOST89MAC, NID_id_Gost28147_89_MAC}, /* SSL_MD_GOST89MAC_IDX 3 */
76 {SSL_SHA256, NID_sha256}, /* SSL_MD_SHA256_IDX 4 */
77 {SSL_SHA384, NID_sha384}, /* SSL_MD_SHA384_IDX 5 */
78 {SSL_GOST12_256, NID_id_GostR3411_2012_256}, /* SSL_MD_GOST12_256_IDX 6 */
79 {SSL_GOST89MAC12, NID_gost_mac_12}, /* SSL_MD_GOST89MAC12_IDX 7 */
80 {SSL_GOST12_512, NID_id_GostR3411_2012_512}, /* SSL_MD_GOST12_512_IDX 8 */
81 {0, NID_md5_sha1}, /* SSL_MD_MD5_SHA1_IDX 9 */
82 {0, NID_sha224}, /* SSL_MD_SHA224_IDX 10 */
83 {0, NID_sha512}, /* SSL_MD_SHA512_IDX 11 */
84 {SSL_MAGMAOMAC, NID_magma_mac}, /* sSL_MD_MAGMAOMAC_IDX */
85 {SSL_KUZNYECHIKOMAC, NID_kuznyechik_mac} /* SSL_MD_KUZNYECHIKOMAC_IDX */
86 };
87
88 /* *INDENT-OFF* */
89 static const ssl_cipher_table ssl_cipher_table_kx[] = {
90 {SSL_kRSA, NID_kx_rsa},
91 {SSL_kECDHE, NID_kx_ecdhe},
92 {SSL_kDHE, NID_kx_dhe},
93 {SSL_kECDHEPSK, NID_kx_ecdhe_psk},
94 {SSL_kDHEPSK, NID_kx_dhe_psk},
95 {SSL_kRSAPSK, NID_kx_rsa_psk},
96 {SSL_kPSK, NID_kx_psk},
97 {SSL_kSRP, NID_kx_srp},
98 {SSL_kGOST, NID_kx_gost},
99 {SSL_kGOST18, NID_kx_gost18},
100 {SSL_kANY, NID_kx_any}
101 };
102
103 static const ssl_cipher_table ssl_cipher_table_auth[] = {
104 {SSL_aRSA, NID_auth_rsa},
105 {SSL_aECDSA, NID_auth_ecdsa},
106 {SSL_aPSK, NID_auth_psk},
107 {SSL_aDSS, NID_auth_dss},
108 {SSL_aGOST01, NID_auth_gost01},
109 {SSL_aGOST12, NID_auth_gost12},
110 {SSL_aSRP, NID_auth_srp},
111 {SSL_aNULL, NID_auth_null},
112 {SSL_aANY, NID_auth_any}
113 };
114 /* *INDENT-ON* */
115
116 /* Utility function for table lookup */
ssl_cipher_info_find(const ssl_cipher_table * table,size_t table_cnt,uint32_t mask)117 static int ssl_cipher_info_find(const ssl_cipher_table * table,
118 size_t table_cnt, uint32_t mask)
119 {
120 size_t i;
121 for (i = 0; i < table_cnt; i++, table++) {
122 if (table->mask == mask)
123 return (int)i;
124 }
125 return -1;
126 }
127
128 #define ssl_cipher_info_lookup(table, x) \
129 ssl_cipher_info_find(table, OSSL_NELEM(table), x)
130
131 /*
132 * PKEY_TYPE for GOST89MAC is known in advance, but, because implementation
133 * is engine-provided, we'll fill it only if corresponding EVP_PKEY_METHOD is
134 * found
135 */
136 static const int default_mac_pkey_id[SSL_MD_NUM_IDX] = {
137 /* MD5, SHA, GOST94, MAC89 */
138 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
139 /* SHA256, SHA384, GOST2012_256, MAC89-12 */
140 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, NID_undef,
141 /* GOST2012_512 */
142 EVP_PKEY_HMAC,
143 /* MD5/SHA1, SHA224, SHA512, MAGMAOMAC, KUZNYECHIKOMAC */
144 NID_undef, NID_undef, NID_undef, NID_undef, NID_undef
145 };
146
147 #define CIPHER_ADD 1
148 #define CIPHER_KILL 2
149 #define CIPHER_DEL 3
150 #define CIPHER_ORD 4
151 #define CIPHER_SPECIAL 5
152 /*
153 * Bump the ciphers to the top of the list.
154 * This rule isn't currently supported by the public cipherstring API.
155 */
156 #define CIPHER_BUMP 6
157
158 typedef struct cipher_order_st {
159 const SSL_CIPHER *cipher;
160 int active;
161 int dead;
162 struct cipher_order_st *next, *prev;
163 } CIPHER_ORDER;
164
165 static const SSL_CIPHER cipher_aliases[] = {
166 /* "ALL" doesn't include eNULL (must be specifically enabled) */
167 {0, SSL_TXT_ALL, NULL, 0, 0, 0, ~SSL_eNULL},
168 /* "COMPLEMENTOFALL" */
169 {0, SSL_TXT_CMPALL, NULL, 0, 0, 0, SSL_eNULL},
170
171 /*
172 * "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in
173 * ALL!)
174 */
175 {0, SSL_TXT_CMPDEF, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_NOT_DEFAULT},
176
177 /*
178 * key exchange aliases (some of those using only a single bit here
179 * combine multiple key exchange algs according to the RFCs, e.g. kDHE
180 * combines DHE_DSS and DHE_RSA)
181 */
182 {0, SSL_TXT_kRSA, NULL, 0, SSL_kRSA},
183
184 {0, SSL_TXT_kEDH, NULL, 0, SSL_kDHE},
185 {0, SSL_TXT_kDHE, NULL, 0, SSL_kDHE},
186 {0, SSL_TXT_DH, NULL, 0, SSL_kDHE},
187
188 {0, SSL_TXT_kEECDH, NULL, 0, SSL_kECDHE},
189 {0, SSL_TXT_kECDHE, NULL, 0, SSL_kECDHE},
190 {0, SSL_TXT_ECDH, NULL, 0, SSL_kECDHE},
191
192 {0, SSL_TXT_kPSK, NULL, 0, SSL_kPSK},
193 {0, SSL_TXT_kRSAPSK, NULL, 0, SSL_kRSAPSK},
194 {0, SSL_TXT_kECDHEPSK, NULL, 0, SSL_kECDHEPSK},
195 {0, SSL_TXT_kDHEPSK, NULL, 0, SSL_kDHEPSK},
196 {0, SSL_TXT_kSRP, NULL, 0, SSL_kSRP},
197 {0, SSL_TXT_kGOST, NULL, 0, SSL_kGOST},
198 {0, SSL_TXT_kGOST18, NULL, 0, SSL_kGOST18},
199
200 /* server authentication aliases */
201 {0, SSL_TXT_aRSA, NULL, 0, 0, SSL_aRSA},
202 {0, SSL_TXT_aDSS, NULL, 0, 0, SSL_aDSS},
203 {0, SSL_TXT_DSS, NULL, 0, 0, SSL_aDSS},
204 {0, SSL_TXT_aNULL, NULL, 0, 0, SSL_aNULL},
205 {0, SSL_TXT_aECDSA, NULL, 0, 0, SSL_aECDSA},
206 {0, SSL_TXT_ECDSA, NULL, 0, 0, SSL_aECDSA},
207 {0, SSL_TXT_aPSK, NULL, 0, 0, SSL_aPSK},
208 {0, SSL_TXT_aGOST01, NULL, 0, 0, SSL_aGOST01},
209 {0, SSL_TXT_aGOST12, NULL, 0, 0, SSL_aGOST12},
210 {0, SSL_TXT_aGOST, NULL, 0, 0, SSL_aGOST01 | SSL_aGOST12},
211 {0, SSL_TXT_aSRP, NULL, 0, 0, SSL_aSRP},
212
213 /* aliases combining key exchange and server authentication */
214 {0, SSL_TXT_EDH, NULL, 0, SSL_kDHE, ~SSL_aNULL},
215 {0, SSL_TXT_DHE, NULL, 0, SSL_kDHE, ~SSL_aNULL},
216 {0, SSL_TXT_EECDH, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
217 {0, SSL_TXT_ECDHE, NULL, 0, SSL_kECDHE, ~SSL_aNULL},
218 {0, SSL_TXT_NULL, NULL, 0, 0, 0, SSL_eNULL},
219 {0, SSL_TXT_RSA, NULL, 0, SSL_kRSA, SSL_aRSA},
220 {0, SSL_TXT_ADH, NULL, 0, SSL_kDHE, SSL_aNULL},
221 {0, SSL_TXT_AECDH, NULL, 0, SSL_kECDHE, SSL_aNULL},
222 {0, SSL_TXT_PSK, NULL, 0, SSL_PSK},
223 {0, SSL_TXT_SRP, NULL, 0, SSL_kSRP},
224
225 /* symmetric encryption aliases */
226 {0, SSL_TXT_3DES, NULL, 0, 0, 0, SSL_3DES},
227 {0, SSL_TXT_RC4, NULL, 0, 0, 0, SSL_RC4},
228 {0, SSL_TXT_RC2, NULL, 0, 0, 0, SSL_RC2},
229 {0, SSL_TXT_IDEA, NULL, 0, 0, 0, SSL_IDEA},
230 {0, SSL_TXT_SEED, NULL, 0, 0, 0, SSL_SEED},
231 {0, SSL_TXT_eNULL, NULL, 0, 0, 0, SSL_eNULL},
232 {0, SSL_TXT_GOST, NULL, 0, 0, 0,
233 SSL_eGOST2814789CNT | SSL_eGOST2814789CNT12 | SSL_MAGMA | SSL_KUZNYECHIK},
234 {0, SSL_TXT_AES128, NULL, 0, 0, 0,
235 SSL_AES128 | SSL_AES128GCM | SSL_AES128CCM | SSL_AES128CCM8},
236 {0, SSL_TXT_AES256, NULL, 0, 0, 0,
237 SSL_AES256 | SSL_AES256GCM | SSL_AES256CCM | SSL_AES256CCM8},
238 {0, SSL_TXT_AES, NULL, 0, 0, 0, SSL_AES},
239 {0, SSL_TXT_AES_GCM, NULL, 0, 0, 0, SSL_AES128GCM | SSL_AES256GCM},
240 {0, SSL_TXT_AES_CCM, NULL, 0, 0, 0,
241 SSL_AES128CCM | SSL_AES256CCM | SSL_AES128CCM8 | SSL_AES256CCM8},
242 {0, SSL_TXT_AES_CCM_8, NULL, 0, 0, 0, SSL_AES128CCM8 | SSL_AES256CCM8},
243 {0, SSL_TXT_CAMELLIA128, NULL, 0, 0, 0, SSL_CAMELLIA128},
244 {0, SSL_TXT_CAMELLIA256, NULL, 0, 0, 0, SSL_CAMELLIA256},
245 {0, SSL_TXT_CAMELLIA, NULL, 0, 0, 0, SSL_CAMELLIA},
246 {0, SSL_TXT_CHACHA20, NULL, 0, 0, 0, SSL_CHACHA20},
247 {0, SSL_TXT_GOST2012_GOST8912_GOST8912, NULL, 0, 0, 0, SSL_eGOST2814789CNT12},
248
249 {0, SSL_TXT_ARIA, NULL, 0, 0, 0, SSL_ARIA},
250 {0, SSL_TXT_ARIA_GCM, NULL, 0, 0, 0, SSL_ARIA128GCM | SSL_ARIA256GCM},
251 {0, SSL_TXT_ARIA128, NULL, 0, 0, 0, SSL_ARIA128GCM},
252 {0, SSL_TXT_ARIA256, NULL, 0, 0, 0, SSL_ARIA256GCM},
253 {0, SSL_TXT_CBC, NULL, 0, 0, 0, SSL_CBC},
254
255 /* MAC aliases */
256 {0, SSL_TXT_MD5, NULL, 0, 0, 0, 0, SSL_MD5},
257 {0, SSL_TXT_SHA1, NULL, 0, 0, 0, 0, SSL_SHA1},
258 {0, SSL_TXT_SHA, NULL, 0, 0, 0, 0, SSL_SHA1},
259 {0, SSL_TXT_GOST94, NULL, 0, 0, 0, 0, SSL_GOST94},
260 {0, SSL_TXT_GOST89MAC, NULL, 0, 0, 0, 0, SSL_GOST89MAC | SSL_GOST89MAC12},
261 {0, SSL_TXT_SHA256, NULL, 0, 0, 0, 0, SSL_SHA256},
262 {0, SSL_TXT_SHA384, NULL, 0, 0, 0, 0, SSL_SHA384},
263 {0, SSL_TXT_GOST12, NULL, 0, 0, 0, 0, SSL_GOST12_256},
264
265 /* protocol version aliases */
266 {0, SSL_TXT_SSLV3, NULL, 0, 0, 0, 0, 0, SSL3_VERSION},
267 {0, SSL_TXT_TLSV1, NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
268 {0, "TLSv1.0", NULL, 0, 0, 0, 0, 0, TLS1_VERSION},
269 {0, SSL_TXT_TLSV1_2, NULL, 0, 0, 0, 0, 0, TLS1_2_VERSION},
270
271 /* strength classes */
272 {0, SSL_TXT_LOW, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_LOW},
273 {0, SSL_TXT_MEDIUM, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_MEDIUM},
274 {0, SSL_TXT_HIGH, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, SSL_HIGH},
275 /* FIPS 140-2 approved ciphersuite */
276 {0, SSL_TXT_FIPS, NULL, 0, 0, 0, ~SSL_eNULL, 0, 0, 0, 0, 0, SSL_FIPS},
277
278 /* "EDH-" aliases to "DHE-" labels (for backward compatibility) */
279 {0, SSL3_TXT_EDH_DSS_DES_192_CBC3_SHA, NULL, 0,
280 SSL_kDHE, SSL_aDSS, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
281 {0, SSL3_TXT_EDH_RSA_DES_192_CBC3_SHA, NULL, 0,
282 SSL_kDHE, SSL_aRSA, SSL_3DES, SSL_SHA1, 0, 0, 0, 0, SSL_HIGH | SSL_FIPS},
283
284 };
285
286 /*
287 * Search for public key algorithm with given name and return its pkey_id if
288 * it is available. Otherwise return 0
289 */
290 #ifdef OPENSSL_NO_ENGINE
291
get_optional_pkey_id(const char * pkey_name)292 static int get_optional_pkey_id(const char *pkey_name)
293 {
294 const EVP_PKEY_ASN1_METHOD *ameth;
295 int pkey_id = 0;
296 ameth = EVP_PKEY_asn1_find_str(NULL, pkey_name, -1);
297 if (ameth && EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
298 ameth) > 0)
299 return pkey_id;
300 return 0;
301 }
302
303 #else
304
get_optional_pkey_id(const char * pkey_name)305 static int get_optional_pkey_id(const char *pkey_name)
306 {
307 const EVP_PKEY_ASN1_METHOD *ameth;
308 ENGINE *tmpeng = NULL;
309 int pkey_id = 0;
310 ameth = EVP_PKEY_asn1_find_str(&tmpeng, pkey_name, -1);
311 if (ameth) {
312 if (EVP_PKEY_asn1_get0_info(&pkey_id, NULL, NULL, NULL, NULL,
313 ameth) <= 0)
314 pkey_id = 0;
315 }
316 tls_engine_finish(tmpeng);
317 return pkey_id;
318 }
319
320 #endif
321
ssl_load_ciphers(SSL_CTX * ctx)322 int ssl_load_ciphers(SSL_CTX *ctx)
323 {
324 size_t i;
325 const ssl_cipher_table *t;
326 EVP_KEYEXCH *kex = NULL;
327 EVP_SIGNATURE *sig = NULL;
328
329 ctx->disabled_enc_mask = 0;
330 for (i = 0, t = ssl_cipher_table_cipher; i < SSL_ENC_NUM_IDX; i++, t++) {
331 if (t->nid != NID_undef) {
332 const EVP_CIPHER *cipher
333 = ssl_evp_cipher_fetch(ctx->libctx, t->nid, ctx->propq);
334
335 ctx->ssl_cipher_methods[i] = cipher;
336 if (cipher == NULL)
337 ctx->disabled_enc_mask |= t->mask;
338 }
339 }
340 ctx->disabled_mac_mask = 0;
341 for (i = 0, t = ssl_cipher_table_mac; i < SSL_MD_NUM_IDX; i++, t++) {
342 const EVP_MD *md
343 = ssl_evp_md_fetch(ctx->libctx, t->nid, ctx->propq);
344
345 ctx->ssl_digest_methods[i] = md;
346 if (md == NULL) {
347 ctx->disabled_mac_mask |= t->mask;
348 } else {
349 int tmpsize = EVP_MD_get_size(md);
350 if (!ossl_assert(tmpsize >= 0))
351 return 0;
352 ctx->ssl_mac_secret_size[i] = tmpsize;
353 }
354 }
355
356 ctx->disabled_mkey_mask = 0;
357 ctx->disabled_auth_mask = 0;
358
359 /*
360 * We ignore any errors from the fetches below. They are expected to fail
361 * if theose algorithms are not available.
362 */
363 ERR_set_mark();
364 sig = EVP_SIGNATURE_fetch(ctx->libctx, "DSA", ctx->propq);
365 if (sig == NULL)
366 ctx->disabled_auth_mask |= SSL_aDSS;
367 else
368 EVP_SIGNATURE_free(sig);
369 kex = EVP_KEYEXCH_fetch(ctx->libctx, "DH", ctx->propq);
370 if (kex == NULL)
371 ctx->disabled_mkey_mask |= SSL_kDHE | SSL_kDHEPSK;
372 else
373 EVP_KEYEXCH_free(kex);
374 kex = EVP_KEYEXCH_fetch(ctx->libctx, "ECDH", ctx->propq);
375 if (kex == NULL)
376 ctx->disabled_mkey_mask |= SSL_kECDHE | SSL_kECDHEPSK;
377 else
378 EVP_KEYEXCH_free(kex);
379 sig = EVP_SIGNATURE_fetch(ctx->libctx, "ECDSA", ctx->propq);
380 if (sig == NULL)
381 ctx->disabled_auth_mask |= SSL_aECDSA;
382 else
383 EVP_SIGNATURE_free(sig);
384 ERR_pop_to_mark();
385
386 #ifdef OPENSSL_NO_PSK
387 ctx->disabled_mkey_mask |= SSL_PSK;
388 ctx->disabled_auth_mask |= SSL_aPSK;
389 #endif
390 #ifdef OPENSSL_NO_SRP
391 ctx->disabled_mkey_mask |= SSL_kSRP;
392 #endif
393
394 /*
395 * Check for presence of GOST 34.10 algorithms, and if they are not
396 * present, disable appropriate auth and key exchange
397 */
398 memcpy(ctx->ssl_mac_pkey_id, default_mac_pkey_id,
399 sizeof(ctx->ssl_mac_pkey_id));
400
401 ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] =
402 get_optional_pkey_id(SN_id_Gost28147_89_MAC);
403 if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX])
404 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
405 else
406 ctx->disabled_mac_mask |= SSL_GOST89MAC;
407
408 ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX] =
409 get_optional_pkey_id(SN_gost_mac_12);
410 if (ctx->ssl_mac_pkey_id[SSL_MD_GOST89MAC12_IDX])
411 ctx->ssl_mac_secret_size[SSL_MD_GOST89MAC12_IDX] = 32;
412 else
413 ctx->disabled_mac_mask |= SSL_GOST89MAC12;
414
415 ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX] =
416 get_optional_pkey_id(SN_magma_mac);
417 if (ctx->ssl_mac_pkey_id[SSL_MD_MAGMAOMAC_IDX])
418 ctx->ssl_mac_secret_size[SSL_MD_MAGMAOMAC_IDX] = 32;
419 else
420 ctx->disabled_mac_mask |= SSL_MAGMAOMAC;
421
422 ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX] =
423 get_optional_pkey_id(SN_kuznyechik_mac);
424 if (ctx->ssl_mac_pkey_id[SSL_MD_KUZNYECHIKOMAC_IDX])
425 ctx->ssl_mac_secret_size[SSL_MD_KUZNYECHIKOMAC_IDX] = 32;
426 else
427 ctx->disabled_mac_mask |= SSL_KUZNYECHIKOMAC;
428
429 if (!get_optional_pkey_id(SN_id_GostR3410_2001))
430 ctx->disabled_auth_mask |= SSL_aGOST01 | SSL_aGOST12;
431 if (!get_optional_pkey_id(SN_id_GostR3410_2012_256))
432 ctx->disabled_auth_mask |= SSL_aGOST12;
433 if (!get_optional_pkey_id(SN_id_GostR3410_2012_512))
434 ctx->disabled_auth_mask |= SSL_aGOST12;
435 /*
436 * Disable GOST key exchange if no GOST signature algs are available *
437 */
438 if ((ctx->disabled_auth_mask & (SSL_aGOST01 | SSL_aGOST12)) ==
439 (SSL_aGOST01 | SSL_aGOST12))
440 ctx->disabled_mkey_mask |= SSL_kGOST;
441
442 if ((ctx->disabled_auth_mask & SSL_aGOST12) == SSL_aGOST12)
443 ctx->disabled_mkey_mask |= SSL_kGOST18;
444
445 return 1;
446 }
447
448 #ifndef OPENSSL_NO_COMP
449
sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)450 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
451 {
452 return ((*a)->id - (*b)->id);
453 }
454
DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)455 DEFINE_RUN_ONCE_STATIC(do_load_builtin_compressions)
456 {
457 SSL_COMP *comp = NULL;
458 COMP_METHOD *method = COMP_zlib();
459
460 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
461
462 if (COMP_get_type(method) != NID_undef && ssl_comp_methods != NULL) {
463 comp = OPENSSL_malloc(sizeof(*comp));
464 if (comp != NULL) {
465 comp->method = method;
466 comp->id = SSL_COMP_ZLIB_IDX;
467 comp->name = COMP_get_name(method);
468 sk_SSL_COMP_push(ssl_comp_methods, comp);
469 sk_SSL_COMP_sort(ssl_comp_methods);
470 }
471 }
472 return 1;
473 }
474
load_builtin_compressions(void)475 static int load_builtin_compressions(void)
476 {
477 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
478 }
479 #endif
480
ssl_cipher_get_evp_cipher(SSL_CTX * ctx,const SSL_CIPHER * sslc,const EVP_CIPHER ** enc)481 int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
482 const EVP_CIPHER **enc)
483 {
484 int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, sslc->algorithm_enc);
485
486 if (i == -1) {
487 *enc = NULL;
488 } else {
489 if (i == SSL_ENC_NULL_IDX) {
490 /*
491 * We assume we don't care about this coming from an ENGINE so
492 * just do a normal EVP_CIPHER_fetch instead of
493 * ssl_evp_cipher_fetch()
494 */
495 *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
496 if (*enc == NULL)
497 return 0;
498 } else {
499 const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
500
501 if (cipher == NULL
502 || !ssl_evp_cipher_up_ref(cipher))
503 return 0;
504 *enc = ctx->ssl_cipher_methods[i];
505 }
506 }
507 return 1;
508 }
509
ssl_cipher_get_evp(SSL_CTX * ctx,const SSL_SESSION * s,const EVP_CIPHER ** enc,const EVP_MD ** md,int * mac_pkey_type,size_t * mac_secret_size,SSL_COMP ** comp,int use_etm)510 int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
511 const EVP_CIPHER **enc, const EVP_MD **md,
512 int *mac_pkey_type, size_t *mac_secret_size,
513 SSL_COMP **comp, int use_etm)
514 {
515 int i;
516 const SSL_CIPHER *c;
517
518 c = s->cipher;
519 if (c == NULL)
520 return 0;
521 if (comp != NULL) {
522 SSL_COMP ctmp;
523 #ifndef OPENSSL_NO_COMP
524 if (!load_builtin_compressions()) {
525 /*
526 * Currently don't care, since a failure only means that
527 * ssl_comp_methods is NULL, which is perfectly OK
528 */
529 }
530 #endif
531 *comp = NULL;
532 ctmp.id = s->compress_meth;
533 if (ssl_comp_methods != NULL) {
534 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
535 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
536 }
537 /* If were only interested in comp then return success */
538 if ((enc == NULL) && (md == NULL))
539 return 1;
540 }
541
542 if ((enc == NULL) || (md == NULL))
543 return 0;
544
545 if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
546 return 0;
547
548 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
549 if (i == -1) {
550 *md = NULL;
551 if (mac_pkey_type != NULL)
552 *mac_pkey_type = NID_undef;
553 if (mac_secret_size != NULL)
554 *mac_secret_size = 0;
555 if (c->algorithm_mac == SSL_AEAD)
556 mac_pkey_type = NULL;
557 } else {
558 const EVP_MD *digest = ctx->ssl_digest_methods[i];
559
560 if (digest == NULL
561 || !ssl_evp_md_up_ref(digest)) {
562 ssl_evp_cipher_free(*enc);
563 return 0;
564 }
565 *md = digest;
566 if (mac_pkey_type != NULL)
567 *mac_pkey_type = ctx->ssl_mac_pkey_id[i];
568 if (mac_secret_size != NULL)
569 *mac_secret_size = ctx->ssl_mac_secret_size[i];
570 }
571
572 if ((*enc != NULL)
573 && (*md != NULL
574 || (EVP_CIPHER_get_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
575 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
576 const EVP_CIPHER *evp = NULL;
577
578 if (use_etm
579 || s->ssl_version >> 8 != TLS1_VERSION_MAJOR
580 || s->ssl_version < TLS1_VERSION)
581 return 1;
582
583 if (c->algorithm_enc == SSL_RC4
584 && c->algorithm_mac == SSL_MD5)
585 evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
586 ctx->propq);
587 else if (c->algorithm_enc == SSL_AES128
588 && c->algorithm_mac == SSL_SHA1)
589 evp = ssl_evp_cipher_fetch(ctx->libctx,
590 NID_aes_128_cbc_hmac_sha1,
591 ctx->propq);
592 else if (c->algorithm_enc == SSL_AES256
593 && c->algorithm_mac == SSL_SHA1)
594 evp = ssl_evp_cipher_fetch(ctx->libctx,
595 NID_aes_256_cbc_hmac_sha1,
596 ctx->propq);
597 else if (c->algorithm_enc == SSL_AES128
598 && c->algorithm_mac == SSL_SHA256)
599 evp = ssl_evp_cipher_fetch(ctx->libctx,
600 NID_aes_128_cbc_hmac_sha256,
601 ctx->propq);
602 else if (c->algorithm_enc == SSL_AES256
603 && c->algorithm_mac == SSL_SHA256)
604 evp = ssl_evp_cipher_fetch(ctx->libctx,
605 NID_aes_256_cbc_hmac_sha256,
606 ctx->propq);
607
608 if (evp != NULL) {
609 ssl_evp_cipher_free(*enc);
610 ssl_evp_md_free(*md);
611 *enc = evp;
612 *md = NULL;
613 }
614 return 1;
615 }
616
617 return 0;
618 }
619
ssl_md(SSL_CTX * ctx,int idx)620 const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
621 {
622 idx &= SSL_HANDSHAKE_MAC_MASK;
623 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
624 return NULL;
625 return ctx->ssl_digest_methods[idx];
626 }
627
ssl_handshake_md(SSL_CONNECTION * s)628 const EVP_MD *ssl_handshake_md(SSL_CONNECTION *s)
629 {
630 return ssl_md(SSL_CONNECTION_GET_CTX(s), ssl_get_algorithm2(s));
631 }
632
ssl_prf_md(SSL_CONNECTION * s)633 const EVP_MD *ssl_prf_md(SSL_CONNECTION *s)
634 {
635 return ssl_md(SSL_CONNECTION_GET_CTX(s),
636 ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
637 }
638
639 #define ITEM_SEP(a) \
640 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
641
ll_append_tail(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)642 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
643 CIPHER_ORDER **tail)
644 {
645 if (curr == *tail)
646 return;
647 if (curr == *head)
648 *head = curr->next;
649 if (curr->prev != NULL)
650 curr->prev->next = curr->next;
651 if (curr->next != NULL)
652 curr->next->prev = curr->prev;
653 (*tail)->next = curr;
654 curr->prev = *tail;
655 curr->next = NULL;
656 *tail = curr;
657 }
658
ll_append_head(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)659 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
660 CIPHER_ORDER **tail)
661 {
662 if (curr == *head)
663 return;
664 if (curr == *tail)
665 *tail = curr->prev;
666 if (curr->next != NULL)
667 curr->next->prev = curr->prev;
668 if (curr->prev != NULL)
669 curr->prev->next = curr->next;
670 (*head)->prev = curr;
671 curr->next = *head;
672 curr->prev = NULL;
673 *head = curr;
674 }
675
ssl_cipher_collect_ciphers(const SSL_METHOD * ssl_method,int num_of_ciphers,uint32_t disabled_mkey,uint32_t disabled_auth,uint32_t disabled_enc,uint32_t disabled_mac,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)676 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
677 int num_of_ciphers,
678 uint32_t disabled_mkey,
679 uint32_t disabled_auth,
680 uint32_t disabled_enc,
681 uint32_t disabled_mac,
682 CIPHER_ORDER *co_list,
683 CIPHER_ORDER **head_p,
684 CIPHER_ORDER **tail_p)
685 {
686 int i, co_list_num;
687 const SSL_CIPHER *c;
688
689 /*
690 * We have num_of_ciphers descriptions compiled in, depending on the
691 * method selected (SSLv3, TLSv1 etc).
692 * These will later be sorted in a linked list with at most num
693 * entries.
694 */
695
696 /* Get the initial list of ciphers */
697 co_list_num = 0; /* actual count of ciphers */
698 for (i = 0; i < num_of_ciphers; i++) {
699 c = ssl_method->get_cipher(i);
700 /* drop those that use any of that is not available */
701 if (c == NULL || !c->valid)
702 continue;
703 if ((c->algorithm_mkey & disabled_mkey) ||
704 (c->algorithm_auth & disabled_auth) ||
705 (c->algorithm_enc & disabled_enc) ||
706 (c->algorithm_mac & disabled_mac))
707 continue;
708 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
709 c->min_tls == 0)
710 continue;
711 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
712 c->min_dtls == 0)
713 continue;
714
715 co_list[co_list_num].cipher = c;
716 co_list[co_list_num].next = NULL;
717 co_list[co_list_num].prev = NULL;
718 co_list[co_list_num].active = 0;
719 co_list_num++;
720 }
721
722 /*
723 * Prepare linked list from list entries
724 */
725 if (co_list_num > 0) {
726 co_list[0].prev = NULL;
727
728 if (co_list_num > 1) {
729 co_list[0].next = &co_list[1];
730
731 for (i = 1; i < co_list_num - 1; i++) {
732 co_list[i].prev = &co_list[i - 1];
733 co_list[i].next = &co_list[i + 1];
734 }
735
736 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
737 }
738
739 co_list[co_list_num - 1].next = NULL;
740
741 *head_p = &co_list[0];
742 *tail_p = &co_list[co_list_num - 1];
743 }
744 }
745
ssl_cipher_collect_aliases(const SSL_CIPHER ** ca_list,int num_of_group_aliases,uint32_t disabled_mkey,uint32_t disabled_auth,uint32_t disabled_enc,uint32_t disabled_mac,CIPHER_ORDER * head)746 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
747 int num_of_group_aliases,
748 uint32_t disabled_mkey,
749 uint32_t disabled_auth,
750 uint32_t disabled_enc,
751 uint32_t disabled_mac,
752 CIPHER_ORDER *head)
753 {
754 CIPHER_ORDER *ciph_curr;
755 const SSL_CIPHER **ca_curr;
756 int i;
757 uint32_t mask_mkey = ~disabled_mkey;
758 uint32_t mask_auth = ~disabled_auth;
759 uint32_t mask_enc = ~disabled_enc;
760 uint32_t mask_mac = ~disabled_mac;
761
762 /*
763 * First, add the real ciphers as already collected
764 */
765 ciph_curr = head;
766 ca_curr = ca_list;
767 while (ciph_curr != NULL) {
768 *ca_curr = ciph_curr->cipher;
769 ca_curr++;
770 ciph_curr = ciph_curr->next;
771 }
772
773 /*
774 * Now we add the available ones from the cipher_aliases[] table.
775 * They represent either one or more algorithms, some of which
776 * in any affected category must be supported (set in enabled_mask),
777 * or represent a cipher strength value (will be added in any case because algorithms=0).
778 */
779 for (i = 0; i < num_of_group_aliases; i++) {
780 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
781 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
782 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
783 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
784
785 if (algorithm_mkey)
786 if ((algorithm_mkey & mask_mkey) == 0)
787 continue;
788
789 if (algorithm_auth)
790 if ((algorithm_auth & mask_auth) == 0)
791 continue;
792
793 if (algorithm_enc)
794 if ((algorithm_enc & mask_enc) == 0)
795 continue;
796
797 if (algorithm_mac)
798 if ((algorithm_mac & mask_mac) == 0)
799 continue;
800
801 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
802 ca_curr++;
803 }
804
805 *ca_curr = NULL; /* end of list */
806 }
807
ssl_cipher_apply_rule(uint32_t cipher_id,uint32_t alg_mkey,uint32_t alg_auth,uint32_t alg_enc,uint32_t alg_mac,int min_tls,uint32_t algo_strength,int rule,int32_t strength_bits,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)808 static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
809 uint32_t alg_auth, uint32_t alg_enc,
810 uint32_t alg_mac, int min_tls,
811 uint32_t algo_strength, int rule,
812 int32_t strength_bits, CIPHER_ORDER **head_p,
813 CIPHER_ORDER **tail_p)
814 {
815 CIPHER_ORDER *head, *tail, *curr, *next, *last;
816 const SSL_CIPHER *cp;
817 int reverse = 0;
818
819 OSSL_TRACE_BEGIN(TLS_CIPHER) {
820 BIO_printf(trc_out,
821 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
822 rule, alg_mkey, alg_auth, alg_enc, alg_mac, min_tls,
823 algo_strength, strength_bits);
824 }
825
826 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
827 reverse = 1; /* needed to maintain sorting between currently
828 * deleted ciphers */
829
830 head = *head_p;
831 tail = *tail_p;
832
833 if (reverse) {
834 next = tail;
835 last = head;
836 } else {
837 next = head;
838 last = tail;
839 }
840
841 curr = NULL;
842 for (;;) {
843 if (curr == last)
844 break;
845
846 curr = next;
847
848 if (curr == NULL)
849 break;
850
851 next = reverse ? curr->prev : curr->next;
852
853 cp = curr->cipher;
854
855 /*
856 * Selection criteria is either the value of strength_bits
857 * or the algorithms used.
858 */
859 if (strength_bits >= 0) {
860 if (strength_bits != cp->strength_bits)
861 continue;
862 } else {
863 if (trc_out != NULL) {
864 BIO_printf(trc_out,
865 "\nName: %s:"
866 "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
867 cp->name, cp->algorithm_mkey, cp->algorithm_auth,
868 cp->algorithm_enc, cp->algorithm_mac, cp->min_tls,
869 cp->algo_strength);
870 }
871 if (cipher_id != 0 && (cipher_id != cp->id))
872 continue;
873 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
874 continue;
875 if (alg_auth && !(alg_auth & cp->algorithm_auth))
876 continue;
877 if (alg_enc && !(alg_enc & cp->algorithm_enc))
878 continue;
879 if (alg_mac && !(alg_mac & cp->algorithm_mac))
880 continue;
881 if (min_tls && (min_tls != cp->min_tls))
882 continue;
883 if ((algo_strength & SSL_STRONG_MASK)
884 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
885 continue;
886 if ((algo_strength & SSL_DEFAULT_MASK)
887 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
888 continue;
889 }
890
891 if (trc_out != NULL)
892 BIO_printf(trc_out, "Action = %d\n", rule);
893
894 /* add the cipher if it has not been added yet. */
895 if (rule == CIPHER_ADD) {
896 /* reverse == 0 */
897 if (!curr->active) {
898 ll_append_tail(&head, curr, &tail);
899 curr->active = 1;
900 }
901 }
902 /* Move the added cipher to this location */
903 else if (rule == CIPHER_ORD) {
904 /* reverse == 0 */
905 if (curr->active) {
906 ll_append_tail(&head, curr, &tail);
907 }
908 } else if (rule == CIPHER_DEL) {
909 /* reverse == 1 */
910 if (curr->active) {
911 /*
912 * most recently deleted ciphersuites get best positions for
913 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
914 * in reverse to maintain the order)
915 */
916 ll_append_head(&head, curr, &tail);
917 curr->active = 0;
918 }
919 } else if (rule == CIPHER_BUMP) {
920 if (curr->active)
921 ll_append_head(&head, curr, &tail);
922 } else if (rule == CIPHER_KILL) {
923 /* reverse == 0 */
924 if (head == curr)
925 head = curr->next;
926 else
927 curr->prev->next = curr->next;
928 if (tail == curr)
929 tail = curr->prev;
930 curr->active = 0;
931 if (curr->next != NULL)
932 curr->next->prev = curr->prev;
933 if (curr->prev != NULL)
934 curr->prev->next = curr->next;
935 curr->next = NULL;
936 curr->prev = NULL;
937 }
938 }
939
940 *head_p = head;
941 *tail_p = tail;
942
943 OSSL_TRACE_END(TLS_CIPHER);
944 }
945
ssl_cipher_strength_sort(CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)946 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
947 CIPHER_ORDER **tail_p)
948 {
949 int32_t max_strength_bits;
950 int i, *number_uses;
951 CIPHER_ORDER *curr;
952
953 /*
954 * This routine sorts the ciphers with descending strength. The sorting
955 * must keep the pre-sorted sequence, so we apply the normal sorting
956 * routine as '+' movement to the end of the list.
957 */
958 max_strength_bits = 0;
959 curr = *head_p;
960 while (curr != NULL) {
961 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
962 max_strength_bits = curr->cipher->strength_bits;
963 curr = curr->next;
964 }
965
966 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
967 if (number_uses == NULL) {
968 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
969 return 0;
970 }
971
972 /*
973 * Now find the strength_bits values actually used
974 */
975 curr = *head_p;
976 while (curr != NULL) {
977 if (curr->active)
978 number_uses[curr->cipher->strength_bits]++;
979 curr = curr->next;
980 }
981 /*
982 * Go through the list of used strength_bits values in descending
983 * order.
984 */
985 for (i = max_strength_bits; i >= 0; i--)
986 if (number_uses[i] > 0)
987 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
988 tail_p);
989
990 OPENSSL_free(number_uses);
991 return 1;
992 }
993
ssl_cipher_process_rulestr(const char * rule_str,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p,const SSL_CIPHER ** ca_list,CERT * c)994 static int ssl_cipher_process_rulestr(const char *rule_str,
995 CIPHER_ORDER **head_p,
996 CIPHER_ORDER **tail_p,
997 const SSL_CIPHER **ca_list, CERT *c)
998 {
999 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
1000 int min_tls;
1001 const char *l, *buf;
1002 int j, multi, found, rule, retval, ok, buflen;
1003 uint32_t cipher_id = 0;
1004 char ch;
1005
1006 retval = 1;
1007 l = rule_str;
1008 for (;;) {
1009 ch = *l;
1010
1011 if (ch == '\0')
1012 break; /* done */
1013 if (ch == '-') {
1014 rule = CIPHER_DEL;
1015 l++;
1016 } else if (ch == '+') {
1017 rule = CIPHER_ORD;
1018 l++;
1019 } else if (ch == '!') {
1020 rule = CIPHER_KILL;
1021 l++;
1022 } else if (ch == '@') {
1023 rule = CIPHER_SPECIAL;
1024 l++;
1025 } else {
1026 rule = CIPHER_ADD;
1027 }
1028
1029 if (ITEM_SEP(ch)) {
1030 l++;
1031 continue;
1032 }
1033
1034 alg_mkey = 0;
1035 alg_auth = 0;
1036 alg_enc = 0;
1037 alg_mac = 0;
1038 min_tls = 0;
1039 algo_strength = 0;
1040
1041 for (;;) {
1042 ch = *l;
1043 buf = l;
1044 buflen = 0;
1045 #ifndef CHARSET_EBCDIC
1046 while (((ch >= 'A') && (ch <= 'Z')) ||
1047 ((ch >= '0') && (ch <= '9')) ||
1048 ((ch >= 'a') && (ch <= 'z')) ||
1049 (ch == '-') || (ch == '_') || (ch == '.') || (ch == '='))
1050 #else
1051 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '_') || (ch == '.')
1052 || (ch == '='))
1053 #endif
1054 {
1055 ch = *(++l);
1056 buflen++;
1057 }
1058
1059 if (buflen == 0) {
1060 /*
1061 * We hit something we cannot deal with,
1062 * it is no command or separator nor
1063 * alphanumeric, so we call this an error.
1064 */
1065 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1066 retval = found = 0;
1067 l++;
1068 break;
1069 }
1070
1071 if (rule == CIPHER_SPECIAL) {
1072 found = 0; /* unused -- avoid compiler warning */
1073 break; /* special treatment */
1074 }
1075
1076 /* check for multi-part specification */
1077 if (ch == '+') {
1078 multi = 1;
1079 l++;
1080 } else {
1081 multi = 0;
1082 }
1083
1084 /*
1085 * Now search for the cipher alias in the ca_list. Be careful
1086 * with the strncmp, because the "buflen" limitation
1087 * will make the rule "ADH:SOME" and the cipher
1088 * "ADH-MY-CIPHER" look like a match for buflen=3.
1089 * So additionally check whether the cipher name found
1090 * has the correct length. We can save a strlen() call:
1091 * just checking for the '\0' at the right place is
1092 * sufficient, we have to strncmp() anyway. (We cannot
1093 * use strcmp(), because buf is not '\0' terminated.)
1094 */
1095 j = found = 0;
1096 cipher_id = 0;
1097 while (ca_list[j]) {
1098 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1099 && (ca_list[j]->name[buflen] == '\0')) {
1100 found = 1;
1101 break;
1102 } else if (ca_list[j]->stdname != NULL
1103 && strncmp(buf, ca_list[j]->stdname, buflen) == 0
1104 && ca_list[j]->stdname[buflen] == '\0') {
1105 found = 1;
1106 break;
1107 } else
1108 j++;
1109 }
1110
1111 if (!found)
1112 break; /* ignore this entry */
1113
1114 if (ca_list[j]->algorithm_mkey) {
1115 if (alg_mkey) {
1116 alg_mkey &= ca_list[j]->algorithm_mkey;
1117 if (!alg_mkey) {
1118 found = 0;
1119 break;
1120 }
1121 } else {
1122 alg_mkey = ca_list[j]->algorithm_mkey;
1123 }
1124 }
1125
1126 if (ca_list[j]->algorithm_auth) {
1127 if (alg_auth) {
1128 alg_auth &= ca_list[j]->algorithm_auth;
1129 if (!alg_auth) {
1130 found = 0;
1131 break;
1132 }
1133 } else {
1134 alg_auth = ca_list[j]->algorithm_auth;
1135 }
1136 }
1137
1138 if (ca_list[j]->algorithm_enc) {
1139 if (alg_enc) {
1140 alg_enc &= ca_list[j]->algorithm_enc;
1141 if (!alg_enc) {
1142 found = 0;
1143 break;
1144 }
1145 } else {
1146 alg_enc = ca_list[j]->algorithm_enc;
1147 }
1148 }
1149
1150 if (ca_list[j]->algorithm_mac) {
1151 if (alg_mac) {
1152 alg_mac &= ca_list[j]->algorithm_mac;
1153 if (!alg_mac) {
1154 found = 0;
1155 break;
1156 }
1157 } else {
1158 alg_mac = ca_list[j]->algorithm_mac;
1159 }
1160 }
1161
1162 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1163 if (algo_strength & SSL_STRONG_MASK) {
1164 algo_strength &=
1165 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1166 ~SSL_STRONG_MASK;
1167 if (!(algo_strength & SSL_STRONG_MASK)) {
1168 found = 0;
1169 break;
1170 }
1171 } else {
1172 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1173 }
1174 }
1175
1176 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1177 if (algo_strength & SSL_DEFAULT_MASK) {
1178 algo_strength &=
1179 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1180 ~SSL_DEFAULT_MASK;
1181 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1182 found = 0;
1183 break;
1184 }
1185 } else {
1186 algo_strength |=
1187 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1188 }
1189 }
1190
1191 if (ca_list[j]->valid) {
1192 /*
1193 * explicit ciphersuite found; its protocol version does not
1194 * become part of the search pattern!
1195 */
1196
1197 cipher_id = ca_list[j]->id;
1198 } else {
1199 /*
1200 * not an explicit ciphersuite; only in this case, the
1201 * protocol version is considered part of the search pattern
1202 */
1203
1204 if (ca_list[j]->min_tls) {
1205 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1206 found = 0;
1207 break;
1208 } else {
1209 min_tls = ca_list[j]->min_tls;
1210 }
1211 }
1212 }
1213
1214 if (!multi)
1215 break;
1216 }
1217
1218 /*
1219 * Ok, we have the rule, now apply it
1220 */
1221 if (rule == CIPHER_SPECIAL) { /* special command */
1222 ok = 0;
1223 if ((buflen == 8) && HAS_PREFIX(buf, "STRENGTH")) {
1224 ok = ssl_cipher_strength_sort(head_p, tail_p);
1225 } else if (buflen == 10 && CHECK_AND_SKIP_PREFIX(buf, "SECLEVEL=")) {
1226 int level = *buf - '0';
1227 if (level < 0 || level > 5) {
1228 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1229 } else {
1230 c->sec_level = level;
1231 ok = 1;
1232 }
1233 } else {
1234 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1235 }
1236 if (ok == 0)
1237 retval = 0;
1238 /*
1239 * We do not support any "multi" options
1240 * together with "@", so throw away the
1241 * rest of the command, if any left, until
1242 * end or ':' is found.
1243 */
1244 while ((*l != '\0') && !ITEM_SEP(*l))
1245 l++;
1246 } else if (found) {
1247 ssl_cipher_apply_rule(cipher_id,
1248 alg_mkey, alg_auth, alg_enc, alg_mac,
1249 min_tls, algo_strength, rule, -1, head_p,
1250 tail_p);
1251 } else {
1252 while ((*l != '\0') && !ITEM_SEP(*l))
1253 l++;
1254 }
1255 if (*l == '\0')
1256 break; /* done */
1257 }
1258
1259 return retval;
1260 }
1261
check_suiteb_cipher_list(const SSL_METHOD * meth,CERT * c,const char ** prule_str)1262 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1263 const char **prule_str)
1264 {
1265 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1266 if (HAS_PREFIX(*prule_str, "SUITEB128ONLY")) {
1267 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1268 } else if (HAS_PREFIX(*prule_str, "SUITEB128C2")) {
1269 suiteb_comb2 = 1;
1270 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1271 } else if (HAS_PREFIX(*prule_str, "SUITEB128")) {
1272 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1273 } else if (HAS_PREFIX(*prule_str, "SUITEB192")) {
1274 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1275 }
1276
1277 if (suiteb_flags) {
1278 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1279 c->cert_flags |= suiteb_flags;
1280 } else {
1281 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1282 }
1283
1284 if (!suiteb_flags)
1285 return 1;
1286 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1287
1288 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1289 ERR_raise(ERR_LIB_SSL, SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1290 return 0;
1291 }
1292
1293 switch (suiteb_flags) {
1294 case SSL_CERT_FLAG_SUITEB_128_LOS:
1295 if (suiteb_comb2)
1296 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1297 else
1298 *prule_str =
1299 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1300 break;
1301 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1302 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1303 break;
1304 case SSL_CERT_FLAG_SUITEB_192_LOS:
1305 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1306 break;
1307 }
1308 return 1;
1309 }
1310
ciphersuite_cb(const char * elem,int len,void * arg)1311 static int ciphersuite_cb(const char *elem, int len, void *arg)
1312 {
1313 STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg;
1314 const SSL_CIPHER *cipher;
1315 /* Arbitrary sized temp buffer for the cipher name. Should be big enough */
1316 char name[80];
1317
1318 if (len > (int)(sizeof(name) - 1))
1319 /* Anyway return 1 so we can parse rest of the list */
1320 return 1;
1321
1322 memcpy(name, elem, len);
1323 name[len] = '\0';
1324
1325 cipher = ssl3_get_cipher_by_std_name(name);
1326 if (cipher == NULL)
1327 /* Ciphersuite not found but return 1 to parse rest of the list */
1328 return 1;
1329
1330 if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
1331 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
1332 return 0;
1333 }
1334
1335 return 1;
1336 }
1337
set_ciphersuites(STACK_OF (SSL_CIPHER)** currciphers,const char * str)1338 static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str)
1339 {
1340 STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null();
1341
1342 if (newciphers == NULL)
1343 return 0;
1344
1345 /* Parse the list. We explicitly allow an empty list */
1346 if (*str != '\0'
1347 && (CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers) <= 0
1348 || sk_SSL_CIPHER_num(newciphers) == 0)) {
1349 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
1350 sk_SSL_CIPHER_free(newciphers);
1351 return 0;
1352 }
1353 sk_SSL_CIPHER_free(*currciphers);
1354 *currciphers = newciphers;
1355
1356 return 1;
1357 }
1358
update_cipher_list_by_id(STACK_OF (SSL_CIPHER)** cipher_list_by_id,STACK_OF (SSL_CIPHER)* cipherstack)1359 static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1360 STACK_OF(SSL_CIPHER) *cipherstack)
1361 {
1362 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1363
1364 if (tmp_cipher_list == NULL) {
1365 return 0;
1366 }
1367
1368 sk_SSL_CIPHER_free(*cipher_list_by_id);
1369 *cipher_list_by_id = tmp_cipher_list;
1370
1371 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1372 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1373
1374 return 1;
1375 }
1376
update_cipher_list(SSL_CTX * ctx,STACK_OF (SSL_CIPHER)** cipher_list,STACK_OF (SSL_CIPHER)** cipher_list_by_id,STACK_OF (SSL_CIPHER)* tls13_ciphersuites)1377 static int update_cipher_list(SSL_CTX *ctx,
1378 STACK_OF(SSL_CIPHER) **cipher_list,
1379 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1380 STACK_OF(SSL_CIPHER) *tls13_ciphersuites)
1381 {
1382 int i;
1383 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list);
1384
1385 if (tmp_cipher_list == NULL)
1386 return 0;
1387
1388 /*
1389 * Delete any existing TLSv1.3 ciphersuites. These are always first in the
1390 * list.
1391 */
1392 while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0
1393 && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls
1394 == TLS1_3_VERSION)
1395 (void)sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
1396
1397 /* Insert the new TLSv1.3 ciphersuites */
1398 for (i = sk_SSL_CIPHER_num(tls13_ciphersuites) - 1; i >= 0; i--) {
1399 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
1400
1401 /* Don't include any TLSv1.3 ciphersuites that are disabled */
1402 if ((sslc->algorithm_enc & ctx->disabled_enc_mask) == 0
1403 && (ssl_cipher_table_mac[sslc->algorithm2
1404 & SSL_HANDSHAKE_MAC_MASK].mask
1405 & ctx->disabled_mac_mask) == 0) {
1406 sk_SSL_CIPHER_unshift(tmp_cipher_list, sslc);
1407 }
1408 }
1409
1410 if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) {
1411 sk_SSL_CIPHER_free(tmp_cipher_list);
1412 return 0;
1413 }
1414
1415 sk_SSL_CIPHER_free(*cipher_list);
1416 *cipher_list = tmp_cipher_list;
1417
1418 return 1;
1419 }
1420
SSL_CTX_set_ciphersuites(SSL_CTX * ctx,const char * str)1421 int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
1422 {
1423 int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str);
1424
1425 if (ret && ctx->cipher_list != NULL)
1426 return update_cipher_list(ctx, &ctx->cipher_list, &ctx->cipher_list_by_id,
1427 ctx->tls13_ciphersuites);
1428
1429 return ret;
1430 }
1431
SSL_set_ciphersuites(SSL * s,const char * str)1432 int SSL_set_ciphersuites(SSL *s, const char *str)
1433 {
1434 STACK_OF(SSL_CIPHER) *cipher_list;
1435 SSL_CONNECTION *sc = SSL_CONNECTION_FROM_SSL(s);
1436 int ret;
1437
1438 if (sc == NULL)
1439 return 0;
1440
1441 ret = set_ciphersuites(&(sc->tls13_ciphersuites), str);
1442
1443 if (sc->cipher_list == NULL) {
1444 if ((cipher_list = SSL_get_ciphers(s)) != NULL)
1445 sc->cipher_list = sk_SSL_CIPHER_dup(cipher_list);
1446 }
1447 if (ret && sc->cipher_list != NULL)
1448 return update_cipher_list(s->ctx, &sc->cipher_list,
1449 &sc->cipher_list_by_id,
1450 sc->tls13_ciphersuites);
1451
1452 return ret;
1453 }
1454
STACK_OF(SSL_CIPHER)1455 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx,
1456 STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
1457 STACK_OF(SSL_CIPHER) **cipher_list,
1458 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1459 const char *rule_str,
1460 CERT *c)
1461 {
1462 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i;
1463 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1464 STACK_OF(SSL_CIPHER) *cipherstack;
1465 const char *rule_p;
1466 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1467 const SSL_CIPHER **ca_list = NULL;
1468 const SSL_METHOD *ssl_method = ctx->method;
1469
1470 /*
1471 * Return with error if nothing to do.
1472 */
1473 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1474 return NULL;
1475
1476 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1477 return NULL;
1478
1479 /*
1480 * To reduce the work to do we only want to process the compiled
1481 * in algorithms, so we first get the mask of disabled ciphers.
1482 */
1483
1484 disabled_mkey = ctx->disabled_mkey_mask;
1485 disabled_auth = ctx->disabled_auth_mask;
1486 disabled_enc = ctx->disabled_enc_mask;
1487 disabled_mac = ctx->disabled_mac_mask;
1488
1489 /*
1490 * Now we have to collect the available ciphers from the compiled
1491 * in ciphers. We cannot get more than the number compiled in, so
1492 * it is used for allocation.
1493 */
1494 num_of_ciphers = ssl_method->num_ciphers();
1495
1496 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1497 if (co_list == NULL) {
1498 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1499 return NULL; /* Failure */
1500 }
1501
1502 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1503 disabled_mkey, disabled_auth, disabled_enc,
1504 disabled_mac, co_list, &head, &tail);
1505
1506 /* Now arrange all ciphers by preference. */
1507
1508 /*
1509 * Everything else being equal, prefer ephemeral ECDH over other key
1510 * exchange mechanisms.
1511 * For consistency, prefer ECDSA over RSA (though this only matters if the
1512 * server has both certificates, and is using the DEFAULT, or a client
1513 * preference).
1514 */
1515 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1516 -1, &head, &tail);
1517 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1518 &tail);
1519 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1520 &tail);
1521
1522 /* Within each strength group, we prefer GCM over CHACHA... */
1523 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1524 &head, &tail);
1525 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1526 &head, &tail);
1527
1528 /*
1529 * ...and generally, our preferred cipher is AES.
1530 * Note that AEADs will be bumped to take preference after sorting by
1531 * strength.
1532 */
1533 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1534 -1, &head, &tail);
1535
1536 /* Temporarily enable everything else for sorting */
1537 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1538
1539 /* Low priority for MD5 */
1540 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1541 &tail);
1542
1543 /*
1544 * Move anonymous ciphers to the end. Usually, these will remain
1545 * disabled. (For applications that allow them, they aren't too bad, but
1546 * we prefer authenticated ciphers.)
1547 */
1548 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1549 &tail);
1550
1551 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1552 &tail);
1553 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1554 &tail);
1555
1556 /* RC4 is sort-of broken -- move to the end */
1557 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1558 &tail);
1559
1560 /*
1561 * Now sort by symmetric encryption strength. The above ordering remains
1562 * in force within each class
1563 */
1564 if (!ssl_cipher_strength_sort(&head, &tail)) {
1565 OPENSSL_free(co_list);
1566 return NULL;
1567 }
1568
1569 /*
1570 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1571 */
1572 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
1573 &head, &tail);
1574
1575 /*
1576 * Irrespective of strength, enforce the following order:
1577 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1578 * Within each group, ciphers remain sorted by strength and previous
1579 * preference, i.e.,
1580 * 1) ECDHE > DHE
1581 * 2) GCM > CHACHA
1582 * 3) AES > rest
1583 * 4) TLS 1.2 > legacy
1584 *
1585 * Because we now bump ciphers to the top of the list, we proceed in
1586 * reverse order of preference.
1587 */
1588 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1589 &head, &tail);
1590 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
1591 CIPHER_BUMP, -1, &head, &tail);
1592 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
1593 CIPHER_BUMP, -1, &head, &tail);
1594
1595 /* Now disable everything (maintaining the ordering!) */
1596 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1597
1598 /*
1599 * We also need cipher aliases for selecting based on the rule_str.
1600 * There might be two types of entries in the rule_str: 1) names
1601 * of ciphers themselves 2) aliases for groups of ciphers.
1602 * For 1) we need the available ciphers and for 2) the cipher
1603 * groups of cipher_aliases added together in one list (otherwise
1604 * we would be happy with just the cipher_aliases table).
1605 */
1606 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
1607 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1608 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
1609 if (ca_list == NULL) {
1610 OPENSSL_free(co_list);
1611 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1612 return NULL; /* Failure */
1613 }
1614 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1615 disabled_mkey, disabled_auth, disabled_enc,
1616 disabled_mac, head);
1617
1618 /*
1619 * If the rule_string begins with DEFAULT, apply the default rule
1620 * before using the (possibly available) additional rules.
1621 */
1622 ok = 1;
1623 rule_p = rule_str;
1624 if (HAS_PREFIX(rule_str, "DEFAULT")) {
1625 ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(),
1626 &head, &tail, ca_list, c);
1627 rule_p += 7;
1628 if (*rule_p == ':')
1629 rule_p++;
1630 }
1631
1632 if (ok && (rule_p[0] != '\0'))
1633 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1634
1635 OPENSSL_free(ca_list); /* Not needed anymore */
1636
1637 if (!ok) { /* Rule processing failure */
1638 OPENSSL_free(co_list);
1639 return NULL;
1640 }
1641
1642 /*
1643 * Allocate new "cipherstack" for the result, return with error
1644 * if we cannot get one.
1645 */
1646 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1647 OPENSSL_free(co_list);
1648 return NULL;
1649 }
1650
1651 /* Add TLSv1.3 ciphers first - we always prefer those if possible */
1652 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
1653 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
1654
1655 /* Don't include any TLSv1.3 ciphers that are disabled */
1656 if ((sslc->algorithm_enc & disabled_enc) != 0
1657 || (ssl_cipher_table_mac[sslc->algorithm2
1658 & SSL_HANDSHAKE_MAC_MASK].mask
1659 & ctx->disabled_mac_mask) != 0) {
1660 sk_SSL_CIPHER_delete(tls13_ciphersuites, i);
1661 i--;
1662 continue;
1663 }
1664
1665 if (!sk_SSL_CIPHER_push(cipherstack, sslc)) {
1666 OPENSSL_free(co_list);
1667 sk_SSL_CIPHER_free(cipherstack);
1668 return NULL;
1669 }
1670 }
1671
1672 OSSL_TRACE_BEGIN(TLS_CIPHER) {
1673 BIO_printf(trc_out, "cipher selection:\n");
1674 }
1675 /*
1676 * The cipher selection for the list is done. The ciphers are added
1677 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1678 */
1679 for (curr = head; curr != NULL; curr = curr->next) {
1680 if (curr->active) {
1681 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1682 OPENSSL_free(co_list);
1683 sk_SSL_CIPHER_free(cipherstack);
1684 OSSL_TRACE_CANCEL(TLS_CIPHER);
1685 return NULL;
1686 }
1687 if (trc_out != NULL)
1688 BIO_printf(trc_out, "<%s>\n", curr->cipher->name);
1689 }
1690 }
1691 OPENSSL_free(co_list); /* Not needed any longer */
1692 OSSL_TRACE_END(TLS_CIPHER);
1693
1694 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) {
1695 sk_SSL_CIPHER_free(cipherstack);
1696 return NULL;
1697 }
1698 sk_SSL_CIPHER_free(*cipher_list);
1699 *cipher_list = cipherstack;
1700
1701 return cipherstack;
1702 }
1703
SSL_CIPHER_description(const SSL_CIPHER * cipher,char * buf,int len)1704 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1705 {
1706 const char *ver;
1707 const char *kx, *au, *enc, *mac;
1708 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1709 static const char *format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-22s Mac=%-4s\n";
1710
1711 if (buf == NULL) {
1712 len = 128;
1713 if ((buf = OPENSSL_malloc(len)) == NULL) {
1714 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1715 return NULL;
1716 }
1717 } else if (len < 128) {
1718 return NULL;
1719 }
1720
1721 alg_mkey = cipher->algorithm_mkey;
1722 alg_auth = cipher->algorithm_auth;
1723 alg_enc = cipher->algorithm_enc;
1724 alg_mac = cipher->algorithm_mac;
1725
1726 ver = ssl_protocol_to_string(cipher->min_tls);
1727
1728 switch (alg_mkey) {
1729 case SSL_kRSA:
1730 kx = "RSA";
1731 break;
1732 case SSL_kDHE:
1733 kx = "DH";
1734 break;
1735 case SSL_kECDHE:
1736 kx = "ECDH";
1737 break;
1738 case SSL_kPSK:
1739 kx = "PSK";
1740 break;
1741 case SSL_kRSAPSK:
1742 kx = "RSAPSK";
1743 break;
1744 case SSL_kECDHEPSK:
1745 kx = "ECDHEPSK";
1746 break;
1747 case SSL_kDHEPSK:
1748 kx = "DHEPSK";
1749 break;
1750 case SSL_kSRP:
1751 kx = "SRP";
1752 break;
1753 case SSL_kGOST:
1754 kx = "GOST";
1755 break;
1756 case SSL_kGOST18:
1757 kx = "GOST18";
1758 break;
1759 case SSL_kANY:
1760 kx = "any";
1761 break;
1762 default:
1763 kx = "unknown";
1764 }
1765
1766 switch (alg_auth) {
1767 case SSL_aRSA:
1768 au = "RSA";
1769 break;
1770 case SSL_aDSS:
1771 au = "DSS";
1772 break;
1773 case SSL_aNULL:
1774 au = "None";
1775 break;
1776 case SSL_aECDSA:
1777 au = "ECDSA";
1778 break;
1779 case SSL_aPSK:
1780 au = "PSK";
1781 break;
1782 case SSL_aSRP:
1783 au = "SRP";
1784 break;
1785 case SSL_aGOST01:
1786 au = "GOST01";
1787 break;
1788 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1789 case (SSL_aGOST12 | SSL_aGOST01):
1790 au = "GOST12";
1791 break;
1792 case SSL_aANY:
1793 au = "any";
1794 break;
1795 default:
1796 au = "unknown";
1797 break;
1798 }
1799
1800 switch (alg_enc) {
1801 case SSL_DES:
1802 enc = "DES(56)";
1803 break;
1804 case SSL_3DES:
1805 enc = "3DES(168)";
1806 break;
1807 case SSL_RC4:
1808 enc = "RC4(128)";
1809 break;
1810 case SSL_RC2:
1811 enc = "RC2(128)";
1812 break;
1813 case SSL_IDEA:
1814 enc = "IDEA(128)";
1815 break;
1816 case SSL_eNULL:
1817 enc = "None";
1818 break;
1819 case SSL_AES128:
1820 enc = "AES(128)";
1821 break;
1822 case SSL_AES256:
1823 enc = "AES(256)";
1824 break;
1825 case SSL_AES128GCM:
1826 enc = "AESGCM(128)";
1827 break;
1828 case SSL_AES256GCM:
1829 enc = "AESGCM(256)";
1830 break;
1831 case SSL_AES128CCM:
1832 enc = "AESCCM(128)";
1833 break;
1834 case SSL_AES256CCM:
1835 enc = "AESCCM(256)";
1836 break;
1837 case SSL_AES128CCM8:
1838 enc = "AESCCM8(128)";
1839 break;
1840 case SSL_AES256CCM8:
1841 enc = "AESCCM8(256)";
1842 break;
1843 case SSL_CAMELLIA128:
1844 enc = "Camellia(128)";
1845 break;
1846 case SSL_CAMELLIA256:
1847 enc = "Camellia(256)";
1848 break;
1849 case SSL_ARIA128GCM:
1850 enc = "ARIAGCM(128)";
1851 break;
1852 case SSL_ARIA256GCM:
1853 enc = "ARIAGCM(256)";
1854 break;
1855 case SSL_SEED:
1856 enc = "SEED(128)";
1857 break;
1858 case SSL_eGOST2814789CNT:
1859 case SSL_eGOST2814789CNT12:
1860 enc = "GOST89(256)";
1861 break;
1862 case SSL_MAGMA:
1863 enc = "MAGMA";
1864 break;
1865 case SSL_KUZNYECHIK:
1866 enc = "KUZNYECHIK";
1867 break;
1868 case SSL_CHACHA20POLY1305:
1869 enc = "CHACHA20/POLY1305(256)";
1870 break;
1871 default:
1872 enc = "unknown";
1873 break;
1874 }
1875
1876 switch (alg_mac) {
1877 case SSL_MD5:
1878 mac = "MD5";
1879 break;
1880 case SSL_SHA1:
1881 mac = "SHA1";
1882 break;
1883 case SSL_SHA256:
1884 mac = "SHA256";
1885 break;
1886 case SSL_SHA384:
1887 mac = "SHA384";
1888 break;
1889 case SSL_AEAD:
1890 mac = "AEAD";
1891 break;
1892 case SSL_GOST89MAC:
1893 case SSL_GOST89MAC12:
1894 mac = "GOST89";
1895 break;
1896 case SSL_GOST94:
1897 mac = "GOST94";
1898 break;
1899 case SSL_GOST12_256:
1900 case SSL_GOST12_512:
1901 mac = "GOST2012";
1902 break;
1903 default:
1904 mac = "unknown";
1905 break;
1906 }
1907
1908 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1909
1910 return buf;
1911 }
1912
SSL_CIPHER_get_version(const SSL_CIPHER * c)1913 const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1914 {
1915 if (c == NULL)
1916 return "(NONE)";
1917
1918 /*
1919 * Backwards-compatibility crutch. In almost all contexts we report TLS
1920 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1921 */
1922 if (c->min_tls == TLS1_VERSION)
1923 return "TLSv1.0";
1924 return ssl_protocol_to_string(c->min_tls);
1925 }
1926
1927 /* return the actual cipher being used */
SSL_CIPHER_get_name(const SSL_CIPHER * c)1928 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1929 {
1930 if (c != NULL)
1931 return c->name;
1932 return "(NONE)";
1933 }
1934
1935 /* return the actual cipher being used in RFC standard name */
SSL_CIPHER_standard_name(const SSL_CIPHER * c)1936 const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
1937 {
1938 if (c != NULL)
1939 return c->stdname;
1940 return "(NONE)";
1941 }
1942
1943 /* return the OpenSSL name based on given RFC standard name */
OPENSSL_cipher_name(const char * stdname)1944 const char *OPENSSL_cipher_name(const char *stdname)
1945 {
1946 const SSL_CIPHER *c;
1947
1948 if (stdname == NULL)
1949 return "(NONE)";
1950 c = ssl3_get_cipher_by_std_name(stdname);
1951 return SSL_CIPHER_get_name(c);
1952 }
1953
1954 /* number of bits for symmetric cipher */
SSL_CIPHER_get_bits(const SSL_CIPHER * c,int * alg_bits)1955 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1956 {
1957 int ret = 0;
1958
1959 if (c != NULL) {
1960 if (alg_bits != NULL)
1961 *alg_bits = (int)c->alg_bits;
1962 ret = (int)c->strength_bits;
1963 }
1964 return ret;
1965 }
1966
SSL_CIPHER_get_id(const SSL_CIPHER * c)1967 uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1968 {
1969 return c->id;
1970 }
1971
SSL_CIPHER_get_protocol_id(const SSL_CIPHER * c)1972 uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c)
1973 {
1974 return c->id & 0xFFFF;
1975 }
1976
ssl3_comp_find(STACK_OF (SSL_COMP)* sk,int n)1977 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1978 {
1979 SSL_COMP *ctmp;
1980 int i, nn;
1981
1982 if ((n == 0) || (sk == NULL))
1983 return NULL;
1984 nn = sk_SSL_COMP_num(sk);
1985 for (i = 0; i < nn; i++) {
1986 ctmp = sk_SSL_COMP_value(sk, i);
1987 if (ctmp->id == n)
1988 return ctmp;
1989 }
1990 return NULL;
1991 }
1992
1993 #ifdef OPENSSL_NO_COMP
STACK_OF(SSL_COMP)1994 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1995 {
1996 return NULL;
1997 }
1998
STACK_OF(SSL_COMP)1999 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
2000 *meths)
2001 {
2002 return meths;
2003 }
2004
SSL_COMP_add_compression_method(int id,COMP_METHOD * cm)2005 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
2006 {
2007 return 1;
2008 }
2009
2010 #else
STACK_OF(SSL_COMP)2011 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
2012 {
2013 load_builtin_compressions();
2014 return ssl_comp_methods;
2015 }
2016
STACK_OF(SSL_COMP)2017 STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
2018 *meths)
2019 {
2020 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
2021 ssl_comp_methods = meths;
2022 return old_meths;
2023 }
2024
cmeth_free(SSL_COMP * cm)2025 static void cmeth_free(SSL_COMP *cm)
2026 {
2027 OPENSSL_free(cm);
2028 }
2029
ssl_comp_free_compression_methods_int(void)2030 void ssl_comp_free_compression_methods_int(void)
2031 {
2032 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
2033 ssl_comp_methods = NULL;
2034 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
2035 }
2036
SSL_COMP_add_compression_method(int id,COMP_METHOD * cm)2037 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
2038 {
2039 SSL_COMP *comp;
2040
2041 if (cm == NULL || COMP_get_type(cm) == NID_undef)
2042 return 1;
2043
2044 /*-
2045 * According to draft-ietf-tls-compression-04.txt, the
2046 * compression number ranges should be the following:
2047 *
2048 * 0 to 63: methods defined by the IETF
2049 * 64 to 192: external party methods assigned by IANA
2050 * 193 to 255: reserved for private use
2051 */
2052 if (id < 193 || id > 255) {
2053 ERR_raise(ERR_LIB_SSL, SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
2054 return 1;
2055 }
2056
2057 comp = OPENSSL_malloc(sizeof(*comp));
2058 if (comp == NULL) {
2059 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
2060 return 1;
2061 }
2062
2063 comp->id = id;
2064 comp->method = cm;
2065 load_builtin_compressions();
2066 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
2067 OPENSSL_free(comp);
2068 ERR_raise(ERR_LIB_SSL, SSL_R_DUPLICATE_COMPRESSION_ID);
2069 return 1;
2070 }
2071 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
2072 OPENSSL_free(comp);
2073 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
2074 return 1;
2075 }
2076 return 0;
2077 }
2078 #endif
2079
SSL_COMP_get_name(const COMP_METHOD * comp)2080 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2081 {
2082 #ifndef OPENSSL_NO_COMP
2083 return comp ? COMP_get_name(comp) : NULL;
2084 #else
2085 return NULL;
2086 #endif
2087 }
2088
SSL_COMP_get0_name(const SSL_COMP * comp)2089 const char *SSL_COMP_get0_name(const SSL_COMP *comp)
2090 {
2091 #ifndef OPENSSL_NO_COMP
2092 return comp->name;
2093 #else
2094 return NULL;
2095 #endif
2096 }
2097
SSL_COMP_get_id(const SSL_COMP * comp)2098 int SSL_COMP_get_id(const SSL_COMP *comp)
2099 {
2100 #ifndef OPENSSL_NO_COMP
2101 return comp->id;
2102 #else
2103 return -1;
2104 #endif
2105 }
2106
ssl_get_cipher_by_char(SSL_CONNECTION * s,const unsigned char * ptr,int all)2107 const SSL_CIPHER *ssl_get_cipher_by_char(SSL_CONNECTION *s,
2108 const unsigned char *ptr,
2109 int all)
2110 {
2111 const SSL_CIPHER *c = SSL_CONNECTION_GET_SSL(s)->method->get_cipher_by_char(ptr);
2112
2113 if (c == NULL || (!all && c->valid == 0))
2114 return NULL;
2115 return c;
2116 }
2117
SSL_CIPHER_find(SSL * ssl,const unsigned char * ptr)2118 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2119 {
2120 return ssl->method->get_cipher_by_char(ptr);
2121 }
2122
SSL_CIPHER_get_cipher_nid(const SSL_CIPHER * c)2123 int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
2124 {
2125 int i;
2126 if (c == NULL)
2127 return NID_undef;
2128 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
2129 if (i == -1)
2130 return NID_undef;
2131 return ssl_cipher_table_cipher[i].nid;
2132 }
2133
SSL_CIPHER_get_digest_nid(const SSL_CIPHER * c)2134 int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
2135 {
2136 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
2137
2138 if (i == -1)
2139 return NID_undef;
2140 return ssl_cipher_table_mac[i].nid;
2141 }
2142
SSL_CIPHER_get_kx_nid(const SSL_CIPHER * c)2143 int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
2144 {
2145 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
2146
2147 if (i == -1)
2148 return NID_undef;
2149 return ssl_cipher_table_kx[i].nid;
2150 }
2151
SSL_CIPHER_get_auth_nid(const SSL_CIPHER * c)2152 int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
2153 {
2154 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
2155
2156 if (i == -1)
2157 return NID_undef;
2158 return ssl_cipher_table_auth[i].nid;
2159 }
2160
SSL_CIPHER_get_handshake_digest(const SSL_CIPHER * c)2161 const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
2162 {
2163 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
2164
2165 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
2166 return NULL;
2167 return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid);
2168 }
2169
SSL_CIPHER_is_aead(const SSL_CIPHER * c)2170 int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
2171 {
2172 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
2173 }
2174
ssl_cipher_get_overhead(const SSL_CIPHER * c,size_t * mac_overhead,size_t * int_overhead,size_t * blocksize,size_t * ext_overhead)2175 int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
2176 size_t *int_overhead, size_t *blocksize,
2177 size_t *ext_overhead)
2178 {
2179 size_t mac = 0, in = 0, blk = 0, out = 0;
2180
2181 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
2182 * because there are no handy #defines for those. */
2183 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
2184 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
2185 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
2186 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
2187 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
2188 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
2189 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
2190 out = 16;
2191 } else if (c->algorithm_mac & SSL_AEAD) {
2192 /* We're supposed to have handled all the AEAD modes above */
2193 return 0;
2194 } else {
2195 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
2196 int digest_nid = SSL_CIPHER_get_digest_nid(c);
2197 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
2198
2199 if (e_md == NULL)
2200 return 0;
2201
2202 mac = EVP_MD_get_size(e_md);
2203 if (c->algorithm_enc != SSL_eNULL) {
2204 int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
2205 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
2206
2207 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
2208 known CBC cipher. */
2209 if (e_ciph == NULL ||
2210 EVP_CIPHER_get_mode(e_ciph) != EVP_CIPH_CBC_MODE)
2211 return 0;
2212
2213 in = 1; /* padding length byte */
2214 out = EVP_CIPHER_get_iv_length(e_ciph);
2215 blk = EVP_CIPHER_get_block_size(e_ciph);
2216 }
2217 }
2218
2219 *mac_overhead = mac;
2220 *int_overhead = in;
2221 *blocksize = blk;
2222 *ext_overhead = out;
2223
2224 return 1;
2225 }
2226
ssl_cert_is_disabled(SSL_CTX * ctx,size_t idx)2227 int ssl_cert_is_disabled(SSL_CTX *ctx, size_t idx)
2228 {
2229 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
2230
2231 if (cl == NULL || (cl->amask & ctx->disabled_auth_mask) != 0)
2232 return 1;
2233 return 0;
2234 }
2235
2236 /*
2237 * Default list of TLSv1.2 (and earlier) ciphers
2238 * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0
2239 * Update both macro and function simultaneously
2240 */
OSSL_default_cipher_list(void)2241 const char *OSSL_default_cipher_list(void)
2242 {
2243 return "ALL:!COMPLEMENTOFDEFAULT:!eNULL";
2244 }
2245
2246 /*
2247 * Default list of TLSv1.3 (and later) ciphers
2248 * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0
2249 * Update both macro and function simultaneously
2250 */
OSSL_default_ciphersuites(void)2251 const char *OSSL_default_ciphersuites(void)
2252 {
2253 return "TLS_AES_256_GCM_SHA384:"
2254 "TLS_CHACHA20_POLY1305_SHA256:"
2255 "TLS_AES_128_GCM_SHA256";
2256 }
2257
