VirtualBox

source: vbox/trunk/src/libs/openssl-3.1.7/ssl/ssl_ciph.c@ 106724

Last change on this file since 106724 was 104078, checked in by vboxsync, 8 months ago

openssl-3.1.5: Applied and adjusted our OpenSSL changes to 3.1.4. bugref:10638
File size: 69.9 KB
Line 
1/*
2 * Copyright 1995-2022 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
27typedef struct {
28 uint32_t mask;
29 int nid;
30} ssl_cipher_table;
31
32/* Table of NIDs for each cipher */
33static 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
64static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
65
66#ifndef OPENSSL_NO_COMP
67static 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 */
71static 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* */
89static 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
103static 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 */
117static 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 */
136static 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
158typedef 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
165static 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
292static 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
305static 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
322int 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
450static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
451{
452 return ((*a)->id - (*b)->id);
453}
454
455DEFINE_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 if (!sk_SSL_COMP_push(ssl_comp_methods, comp))
469 OPENSSL_free(comp);
470 sk_SSL_COMP_sort(ssl_comp_methods);
471 }
472 }
473 return 1;
474}
475
476static int load_builtin_compressions(void)
477{
478 return RUN_ONCE(&ssl_load_builtin_comp_once, do_load_builtin_compressions);
479}
480#endif
481
482int ssl_cipher_get_evp_cipher(SSL_CTX *ctx, const SSL_CIPHER *sslc,
483 const EVP_CIPHER **enc)
484{
485 int i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, sslc->algorithm_enc);
486
487 if (i == -1) {
488 *enc = NULL;
489 } else {
490 if (i == SSL_ENC_NULL_IDX) {
491 /*
492 * We assume we don't care about this coming from an ENGINE so
493 * just do a normal EVP_CIPHER_fetch instead of
494 * ssl_evp_cipher_fetch()
495 */
496 *enc = EVP_CIPHER_fetch(ctx->libctx, "NULL", ctx->propq);
497 if (*enc == NULL)
498 return 0;
499 } else {
500 const EVP_CIPHER *cipher = ctx->ssl_cipher_methods[i];
501
502 if (cipher == NULL
503 || !ssl_evp_cipher_up_ref(cipher))
504 return 0;
505 *enc = ctx->ssl_cipher_methods[i];
506 }
507 }
508 return 1;
509}
510
511int ssl_cipher_get_evp(SSL_CTX *ctx, const SSL_SESSION *s,
512 const EVP_CIPHER **enc, const EVP_MD **md,
513 int *mac_pkey_type, size_t *mac_secret_size,
514 SSL_COMP **comp, int use_etm)
515{
516 int i;
517 const SSL_CIPHER *c;
518
519 c = s->cipher;
520 if (c == NULL)
521 return 0;
522 if (comp != NULL) {
523 SSL_COMP ctmp;
524#ifndef OPENSSL_NO_COMP
525 if (!load_builtin_compressions()) {
526 /*
527 * Currently don't care, since a failure only means that
528 * ssl_comp_methods is NULL, which is perfectly OK
529 */
530 }
531#endif
532 *comp = NULL;
533 ctmp.id = s->compress_meth;
534 if (ssl_comp_methods != NULL) {
535 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
536 if (i >= 0)
537 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
538 }
539 /* If were only interested in comp then return success */
540 if ((enc == NULL) && (md == NULL))
541 return 1;
542 }
543
544 if ((enc == NULL) || (md == NULL))
545 return 0;
546
547 if (!ssl_cipher_get_evp_cipher(ctx, c, enc))
548 return 0;
549
550 i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
551 if (i == -1) {
552 *md = NULL;
553 if (mac_pkey_type != NULL)
554 *mac_pkey_type = NID_undef;
555 if (mac_secret_size != NULL)
556 *mac_secret_size = 0;
557 if (c->algorithm_mac == SSL_AEAD)
558 mac_pkey_type = NULL;
559 } else {
560 const EVP_MD *digest = ctx->ssl_digest_methods[i];
561
562 if (digest == NULL
563 || !ssl_evp_md_up_ref(digest)) {
564 ssl_evp_cipher_free(*enc);
565 return 0;
566 }
567 *md = digest;
568 if (mac_pkey_type != NULL)
569 *mac_pkey_type = ctx->ssl_mac_pkey_id[i];
570 if (mac_secret_size != NULL)
571 *mac_secret_size = ctx->ssl_mac_secret_size[i];
572 }
573
574 if ((*enc != NULL)
575 && (*md != NULL
576 || (EVP_CIPHER_get_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER))
577 && (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
578 const EVP_CIPHER *evp = NULL;
579
580 if (use_etm
581 || s->ssl_version >> 8 != TLS1_VERSION_MAJOR
582 || s->ssl_version < TLS1_VERSION)
583 return 1;
584
585 if (c->algorithm_enc == SSL_RC4
586 && c->algorithm_mac == SSL_MD5)
587 evp = ssl_evp_cipher_fetch(ctx->libctx, NID_rc4_hmac_md5,
588 ctx->propq);
589 else if (c->algorithm_enc == SSL_AES128
590 && c->algorithm_mac == SSL_SHA1)
591 evp = ssl_evp_cipher_fetch(ctx->libctx,
592 NID_aes_128_cbc_hmac_sha1,
593 ctx->propq);
594 else if (c->algorithm_enc == SSL_AES256
595 && c->algorithm_mac == SSL_SHA1)
596 evp = ssl_evp_cipher_fetch(ctx->libctx,
597 NID_aes_256_cbc_hmac_sha1,
598 ctx->propq);
599 else if (c->algorithm_enc == SSL_AES128
600 && c->algorithm_mac == SSL_SHA256)
601 evp = ssl_evp_cipher_fetch(ctx->libctx,
602 NID_aes_128_cbc_hmac_sha256,
603 ctx->propq);
604 else if (c->algorithm_enc == SSL_AES256
605 && c->algorithm_mac == SSL_SHA256)
606 evp = ssl_evp_cipher_fetch(ctx->libctx,
607 NID_aes_256_cbc_hmac_sha256,
608 ctx->propq);
609
610 if (evp != NULL) {
611 ssl_evp_cipher_free(*enc);
612 ssl_evp_md_free(*md);
613 *enc = evp;
614 *md = NULL;
615 }
616 return 1;
617 }
618
619 return 0;
620}
621
622const EVP_MD *ssl_md(SSL_CTX *ctx, int idx)
623{
624 idx &= SSL_HANDSHAKE_MAC_MASK;
625 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
626 return NULL;
627 return ctx->ssl_digest_methods[idx];
628}
629
630const EVP_MD *ssl_handshake_md(SSL *s)
631{
632 return ssl_md(s->ctx, ssl_get_algorithm2(s));
633}
634
635const EVP_MD *ssl_prf_md(SSL *s)
636{
637 return ssl_md(s->ctx, ssl_get_algorithm2(s) >> TLS1_PRF_DGST_SHIFT);
638}
639
640#define ITEM_SEP(a) \
641 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
642
643static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
644 CIPHER_ORDER **tail)
645{
646 if (curr == *tail)
647 return;
648 if (curr == *head)
649 *head = curr->next;
650 if (curr->prev != NULL)
651 curr->prev->next = curr->next;
652 if (curr->next != NULL)
653 curr->next->prev = curr->prev;
654 (*tail)->next = curr;
655 curr->prev = *tail;
656 curr->next = NULL;
657 *tail = curr;
658}
659
660static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
661 CIPHER_ORDER **tail)
662{
663 if (curr == *head)
664 return;
665 if (curr == *tail)
666 *tail = curr->prev;
667 if (curr->next != NULL)
668 curr->next->prev = curr->prev;
669 if (curr->prev != NULL)
670 curr->prev->next = curr->next;
671 (*head)->prev = curr;
672 curr->next = *head;
673 curr->prev = NULL;
674 *head = curr;
675}
676
677static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
678 int num_of_ciphers,
679 uint32_t disabled_mkey,
680 uint32_t disabled_auth,
681 uint32_t disabled_enc,
682 uint32_t disabled_mac,
683 CIPHER_ORDER *co_list,
684 CIPHER_ORDER **head_p,
685 CIPHER_ORDER **tail_p)
686{
687 int i, co_list_num;
688 const SSL_CIPHER *c;
689
690 /*
691 * We have num_of_ciphers descriptions compiled in, depending on the
692 * method selected (SSLv3, TLSv1 etc).
693 * These will later be sorted in a linked list with at most num
694 * entries.
695 */
696
697 /* Get the initial list of ciphers */
698 co_list_num = 0; /* actual count of ciphers */
699 for (i = 0; i < num_of_ciphers; i++) {
700 c = ssl_method->get_cipher(i);
701 /* drop those that use any of that is not available */
702 if (c == NULL || !c->valid)
703 continue;
704 if ((c->algorithm_mkey & disabled_mkey) ||
705 (c->algorithm_auth & disabled_auth) ||
706 (c->algorithm_enc & disabled_enc) ||
707 (c->algorithm_mac & disabled_mac))
708 continue;
709 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) == 0) &&
710 c->min_tls == 0)
711 continue;
712 if (((ssl_method->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS) != 0) &&
713 c->min_dtls == 0)
714 continue;
715
716 co_list[co_list_num].cipher = c;
717 co_list[co_list_num].next = NULL;
718 co_list[co_list_num].prev = NULL;
719 co_list[co_list_num].active = 0;
720 co_list_num++;
721 }
722
723 /*
724 * Prepare linked list from list entries
725 */
726 if (co_list_num > 0) {
727 co_list[0].prev = NULL;
728
729 if (co_list_num > 1) {
730 co_list[0].next = &co_list[1];
731
732 for (i = 1; i < co_list_num - 1; i++) {
733 co_list[i].prev = &co_list[i - 1];
734 co_list[i].next = &co_list[i + 1];
735 }
736
737 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
738 }
739
740 co_list[co_list_num - 1].next = NULL;
741
742 *head_p = &co_list[0];
743 *tail_p = &co_list[co_list_num - 1];
744 }
745}
746
747static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
748 int num_of_group_aliases,
749 uint32_t disabled_mkey,
750 uint32_t disabled_auth,
751 uint32_t disabled_enc,
752 uint32_t disabled_mac,
753 CIPHER_ORDER *head)
754{
755 CIPHER_ORDER *ciph_curr;
756 const SSL_CIPHER **ca_curr;
757 int i;
758 uint32_t mask_mkey = ~disabled_mkey;
759 uint32_t mask_auth = ~disabled_auth;
760 uint32_t mask_enc = ~disabled_enc;
761 uint32_t mask_mac = ~disabled_mac;
762
763 /*
764 * First, add the real ciphers as already collected
765 */
766 ciph_curr = head;
767 ca_curr = ca_list;
768 while (ciph_curr != NULL) {
769 *ca_curr = ciph_curr->cipher;
770 ca_curr++;
771 ciph_curr = ciph_curr->next;
772 }
773
774 /*
775 * Now we add the available ones from the cipher_aliases[] table.
776 * They represent either one or more algorithms, some of which
777 * in any affected category must be supported (set in enabled_mask),
778 * or represent a cipher strength value (will be added in any case because algorithms=0).
779 */
780 for (i = 0; i < num_of_group_aliases; i++) {
781 uint32_t algorithm_mkey = cipher_aliases[i].algorithm_mkey;
782 uint32_t algorithm_auth = cipher_aliases[i].algorithm_auth;
783 uint32_t algorithm_enc = cipher_aliases[i].algorithm_enc;
784 uint32_t algorithm_mac = cipher_aliases[i].algorithm_mac;
785
786 if (algorithm_mkey)
787 if ((algorithm_mkey & mask_mkey) == 0)
788 continue;
789
790 if (algorithm_auth)
791 if ((algorithm_auth & mask_auth) == 0)
792 continue;
793
794 if (algorithm_enc)
795 if ((algorithm_enc & mask_enc) == 0)
796 continue;
797
798 if (algorithm_mac)
799 if ((algorithm_mac & mask_mac) == 0)
800 continue;
801
802 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
803 ca_curr++;
804 }
805
806 *ca_curr = NULL; /* end of list */
807}
808
809static void ssl_cipher_apply_rule(uint32_t cipher_id, uint32_t alg_mkey,
810 uint32_t alg_auth, uint32_t alg_enc,
811 uint32_t alg_mac, int min_tls,
812 uint32_t algo_strength, int rule,
813 int32_t strength_bits, CIPHER_ORDER **head_p,
814 CIPHER_ORDER **tail_p)
815{
816 CIPHER_ORDER *head, *tail, *curr, *next, *last;
817 const SSL_CIPHER *cp;
818 int reverse = 0;
819
820 OSSL_TRACE_BEGIN(TLS_CIPHER){
821 BIO_printf(trc_out,
822 "Applying rule %d with %08x/%08x/%08x/%08x/%08x %08x (%d)\n",
823 rule, (unsigned int)alg_mkey, (unsigned int)alg_auth,
824 (unsigned int)alg_enc, (unsigned int)alg_mac, min_tls,
825 (unsigned int)algo_strength, (int)strength_bits);
826 }
827
828 if (rule == CIPHER_DEL || rule == CIPHER_BUMP)
829 reverse = 1; /* needed to maintain sorting between currently
830 * deleted ciphers */
831
832 head = *head_p;
833 tail = *tail_p;
834
835 if (reverse) {
836 next = tail;
837 last = head;
838 } else {
839 next = head;
840 last = tail;
841 }
842
843 curr = NULL;
844 for (;;) {
845 if (curr == last)
846 break;
847
848 curr = next;
849
850 if (curr == NULL)
851 break;
852
853 next = reverse ? curr->prev : curr->next;
854
855 cp = curr->cipher;
856
857 /*
858 * Selection criteria is either the value of strength_bits
859 * or the algorithms used.
860 */
861 if (strength_bits >= 0) {
862 if (strength_bits != cp->strength_bits)
863 continue;
864 } else {
865 if (trc_out != NULL) {
866 BIO_printf(trc_out,
867 "\nName: %s:"
868 "\nAlgo = %08x/%08x/%08x/%08x/%08x Algo_strength = %08x\n",
869 cp->name,
870 (unsigned int)cp->algorithm_mkey,
871 (unsigned int)cp->algorithm_auth,
872 (unsigned int)cp->algorithm_enc,
873 (unsigned int)cp->algorithm_mac,
874 cp->min_tls,
875 (unsigned int)cp->algo_strength);
876 }
877 if (cipher_id != 0 && (cipher_id != cp->id))
878 continue;
879 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
880 continue;
881 if (alg_auth && !(alg_auth & cp->algorithm_auth))
882 continue;
883 if (alg_enc && !(alg_enc & cp->algorithm_enc))
884 continue;
885 if (alg_mac && !(alg_mac & cp->algorithm_mac))
886 continue;
887 if (min_tls && (min_tls != cp->min_tls))
888 continue;
889 if ((algo_strength & SSL_STRONG_MASK)
890 && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
891 continue;
892 if ((algo_strength & SSL_DEFAULT_MASK)
893 && !(algo_strength & SSL_DEFAULT_MASK & cp->algo_strength))
894 continue;
895 }
896
897 if (trc_out != NULL)
898 BIO_printf(trc_out, "Action = %d\n", rule);
899
900 /* add the cipher if it has not been added yet. */
901 if (rule == CIPHER_ADD) {
902 /* reverse == 0 */
903 if (!curr->active) {
904 ll_append_tail(&head, curr, &tail);
905 curr->active = 1;
906 }
907 }
908 /* Move the added cipher to this location */
909 else if (rule == CIPHER_ORD) {
910 /* reverse == 0 */
911 if (curr->active) {
912 ll_append_tail(&head, curr, &tail);
913 }
914 } else if (rule == CIPHER_DEL) {
915 /* reverse == 1 */
916 if (curr->active) {
917 /*
918 * most recently deleted ciphersuites get best positions for
919 * any future CIPHER_ADD (note that the CIPHER_DEL loop works
920 * in reverse to maintain the order)
921 */
922 ll_append_head(&head, curr, &tail);
923 curr->active = 0;
924 }
925 } else if (rule == CIPHER_BUMP) {
926 if (curr->active)
927 ll_append_head(&head, curr, &tail);
928 } else if (rule == CIPHER_KILL) {
929 /* reverse == 0 */
930 if (head == curr)
931 head = curr->next;
932 else
933 curr->prev->next = curr->next;
934 if (tail == curr)
935 tail = curr->prev;
936 curr->active = 0;
937 if (curr->next != NULL)
938 curr->next->prev = curr->prev;
939 if (curr->prev != NULL)
940 curr->prev->next = curr->next;
941 curr->next = NULL;
942 curr->prev = NULL;
943 }
944 }
945
946 *head_p = head;
947 *tail_p = tail;
948
949 OSSL_TRACE_END(TLS_CIPHER);
950}
951
952static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
953 CIPHER_ORDER **tail_p)
954{
955 int32_t max_strength_bits;
956 int i, *number_uses;
957 CIPHER_ORDER *curr;
958
959 /*
960 * This routine sorts the ciphers with descending strength. The sorting
961 * must keep the pre-sorted sequence, so we apply the normal sorting
962 * routine as '+' movement to the end of the list.
963 */
964 max_strength_bits = 0;
965 curr = *head_p;
966 while (curr != NULL) {
967 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
968 max_strength_bits = curr->cipher->strength_bits;
969 curr = curr->next;
970 }
971
972 number_uses = OPENSSL_zalloc(sizeof(int) * (max_strength_bits + 1));
973 if (number_uses == NULL) {
974 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
975 return 0;
976 }
977
978 /*
979 * Now find the strength_bits values actually used
980 */
981 curr = *head_p;
982 while (curr != NULL) {
983 if (curr->active)
984 number_uses[curr->cipher->strength_bits]++;
985 curr = curr->next;
986 }
987 /*
988 * Go through the list of used strength_bits values in descending
989 * order.
990 */
991 for (i = max_strength_bits; i >= 0; i--)
992 if (number_uses[i] > 0)
993 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p,
994 tail_p);
995
996 OPENSSL_free(number_uses);
997 return 1;
998}
999
1000static int ssl_cipher_process_rulestr(const char *rule_str,
1001 CIPHER_ORDER **head_p,
1002 CIPHER_ORDER **tail_p,
1003 const SSL_CIPHER **ca_list, CERT *c)
1004{
1005 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac, algo_strength;
1006 int min_tls;
1007 const char *l, *buf;
1008 int j, multi, found, rule, retval, ok, buflen;
1009 uint32_t cipher_id = 0;
1010 char ch;
1011
1012 retval = 1;
1013 l = rule_str;
1014 for ( ; ; ) {
1015 ch = *l;
1016
1017 if (ch == '\0')
1018 break; /* done */
1019 if (ch == '-') {
1020 rule = CIPHER_DEL;
1021 l++;
1022 } else if (ch == '+') {
1023 rule = CIPHER_ORD;
1024 l++;
1025 } else if (ch == '!') {
1026 rule = CIPHER_KILL;
1027 l++;
1028 } else if (ch == '@') {
1029 rule = CIPHER_SPECIAL;
1030 l++;
1031 } else {
1032 rule = CIPHER_ADD;
1033 }
1034
1035 if (ITEM_SEP(ch)) {
1036 l++;
1037 continue;
1038 }
1039
1040 alg_mkey = 0;
1041 alg_auth = 0;
1042 alg_enc = 0;
1043 alg_mac = 0;
1044 min_tls = 0;
1045 algo_strength = 0;
1046
1047 for (;;) {
1048 ch = *l;
1049 buf = l;
1050 buflen = 0;
1051#ifndef CHARSET_EBCDIC
1052 while (((ch >= 'A') && (ch <= 'Z')) ||
1053 ((ch >= '0') && (ch <= '9')) ||
1054 ((ch >= 'a') && (ch <= 'z')) ||
1055 (ch == '-') || (ch == '.') || (ch == '='))
1056#else
1057 while (isalnum((unsigned char)ch) || (ch == '-') || (ch == '.')
1058 || (ch == '='))
1059#endif
1060 {
1061 ch = *(++l);
1062 buflen++;
1063 }
1064
1065 if (buflen == 0) {
1066 /*
1067 * We hit something we cannot deal with,
1068 * it is no command or separator nor
1069 * alphanumeric, so we call this an error.
1070 */
1071 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1072 return 0;
1073 }
1074
1075 if (rule == CIPHER_SPECIAL) {
1076 found = 0; /* unused -- avoid compiler warning */
1077 break; /* special treatment */
1078 }
1079
1080 /* check for multi-part specification */
1081 if (ch == '+') {
1082 multi = 1;
1083 l++;
1084 } else {
1085 multi = 0;
1086 }
1087
1088 /*
1089 * Now search for the cipher alias in the ca_list. Be careful
1090 * with the strncmp, because the "buflen" limitation
1091 * will make the rule "ADH:SOME" and the cipher
1092 * "ADH-MY-CIPHER" look like a match for buflen=3.
1093 * So additionally check whether the cipher name found
1094 * has the correct length. We can save a strlen() call:
1095 * just checking for the '\0' at the right place is
1096 * sufficient, we have to strncmp() anyway. (We cannot
1097 * use strcmp(), because buf is not '\0' terminated.)
1098 */
1099 j = found = 0;
1100 cipher_id = 0;
1101 while (ca_list[j]) {
1102 if (strncmp(buf, ca_list[j]->name, buflen) == 0
1103 && (ca_list[j]->name[buflen] == '\0')) {
1104 found = 1;
1105 break;
1106 } else
1107 j++;
1108 }
1109
1110 if (!found)
1111 break; /* ignore this entry */
1112
1113 if (ca_list[j]->algorithm_mkey) {
1114 if (alg_mkey) {
1115 alg_mkey &= ca_list[j]->algorithm_mkey;
1116 if (!alg_mkey) {
1117 found = 0;
1118 break;
1119 }
1120 } else {
1121 alg_mkey = ca_list[j]->algorithm_mkey;
1122 }
1123 }
1124
1125 if (ca_list[j]->algorithm_auth) {
1126 if (alg_auth) {
1127 alg_auth &= ca_list[j]->algorithm_auth;
1128 if (!alg_auth) {
1129 found = 0;
1130 break;
1131 }
1132 } else {
1133 alg_auth = ca_list[j]->algorithm_auth;
1134 }
1135 }
1136
1137 if (ca_list[j]->algorithm_enc) {
1138 if (alg_enc) {
1139 alg_enc &= ca_list[j]->algorithm_enc;
1140 if (!alg_enc) {
1141 found = 0;
1142 break;
1143 }
1144 } else {
1145 alg_enc = ca_list[j]->algorithm_enc;
1146 }
1147 }
1148
1149 if (ca_list[j]->algorithm_mac) {
1150 if (alg_mac) {
1151 alg_mac &= ca_list[j]->algorithm_mac;
1152 if (!alg_mac) {
1153 found = 0;
1154 break;
1155 }
1156 } else {
1157 alg_mac = ca_list[j]->algorithm_mac;
1158 }
1159 }
1160
1161 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1162 if (algo_strength & SSL_STRONG_MASK) {
1163 algo_strength &=
1164 (ca_list[j]->algo_strength & SSL_STRONG_MASK) |
1165 ~SSL_STRONG_MASK;
1166 if (!(algo_strength & SSL_STRONG_MASK)) {
1167 found = 0;
1168 break;
1169 }
1170 } else {
1171 algo_strength = ca_list[j]->algo_strength & SSL_STRONG_MASK;
1172 }
1173 }
1174
1175 if (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) {
1176 if (algo_strength & SSL_DEFAULT_MASK) {
1177 algo_strength &=
1178 (ca_list[j]->algo_strength & SSL_DEFAULT_MASK) |
1179 ~SSL_DEFAULT_MASK;
1180 if (!(algo_strength & SSL_DEFAULT_MASK)) {
1181 found = 0;
1182 break;
1183 }
1184 } else {
1185 algo_strength |=
1186 ca_list[j]->algo_strength & SSL_DEFAULT_MASK;
1187 }
1188 }
1189
1190 if (ca_list[j]->valid) {
1191 /*
1192 * explicit ciphersuite found; its protocol version does not
1193 * become part of the search pattern!
1194 */
1195
1196 cipher_id = ca_list[j]->id;
1197 } else {
1198 /*
1199 * not an explicit ciphersuite; only in this case, the
1200 * protocol version is considered part of the search pattern
1201 */
1202
1203 if (ca_list[j]->min_tls) {
1204 if (min_tls != 0 && min_tls != ca_list[j]->min_tls) {
1205 found = 0;
1206 break;
1207 } else {
1208 min_tls = ca_list[j]->min_tls;
1209 }
1210 }
1211 }
1212
1213 if (!multi)
1214 break;
1215 }
1216
1217 /*
1218 * Ok, we have the rule, now apply it
1219 */
1220 if (rule == CIPHER_SPECIAL) { /* special command */
1221 ok = 0;
1222 if ((buflen == 8) && strncmp(buf, "STRENGTH", 8) == 0) {
1223 ok = ssl_cipher_strength_sort(head_p, tail_p);
1224 } else if (buflen == 10 && strncmp(buf, "SECLEVEL=", 9) == 0) {
1225 int level = buf[9] - '0';
1226 if (level < 0 || level > 5) {
1227 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1228 } else {
1229 c->sec_level = level;
1230 ok = 1;
1231 }
1232 } else {
1233 ERR_raise(ERR_LIB_SSL, SSL_R_INVALID_COMMAND);
1234 }
1235 if (ok == 0)
1236 retval = 0;
1237 /*
1238 * We do not support any "multi" options
1239 * together with "@", so throw away the
1240 * rest of the command, if any left, until
1241 * end or ':' is found.
1242 */
1243 while ((*l != '\0') && !ITEM_SEP(*l))
1244 l++;
1245 } else if (found) {
1246 ssl_cipher_apply_rule(cipher_id,
1247 alg_mkey, alg_auth, alg_enc, alg_mac,
1248 min_tls, algo_strength, rule, -1, head_p,
1249 tail_p);
1250 } else {
1251 while ((*l != '\0') && !ITEM_SEP(*l))
1252 l++;
1253 }
1254 if (*l == '\0')
1255 break; /* done */
1256 }
1257
1258 return retval;
1259}
1260
1261static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1262 const char **prule_str)
1263{
1264 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1265 if (strncmp(*prule_str, "SUITEB128ONLY", 13) == 0) {
1266 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1267 } else if (strncmp(*prule_str, "SUITEB128C2", 11) == 0) {
1268 suiteb_comb2 = 1;
1269 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1270 } else if (strncmp(*prule_str, "SUITEB128", 9) == 0) {
1271 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1272 } else if (strncmp(*prule_str, "SUITEB192", 9) == 0) {
1273 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1274 }
1275
1276 if (suiteb_flags) {
1277 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1278 c->cert_flags |= suiteb_flags;
1279 } else {
1280 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1281 }
1282
1283 if (!suiteb_flags)
1284 return 1;
1285 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1286
1287 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS)) {
1288 ERR_raise(ERR_LIB_SSL, SSL_R_AT_LEAST_TLS_1_2_NEEDED_IN_SUITEB_MODE);
1289 return 0;
1290 }
1291
1292 switch (suiteb_flags) {
1293 case SSL_CERT_FLAG_SUITEB_128_LOS:
1294 if (suiteb_comb2)
1295 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1296 else
1297 *prule_str =
1298 "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1299 break;
1300 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1301 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1302 break;
1303 case SSL_CERT_FLAG_SUITEB_192_LOS:
1304 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1305 break;
1306 }
1307 return 1;
1308}
1309
1310static int ciphersuite_cb(const char *elem, int len, void *arg)
1311{
1312 STACK_OF(SSL_CIPHER) *ciphersuites = (STACK_OF(SSL_CIPHER) *)arg;
1313 const SSL_CIPHER *cipher;
1314 /* Arbitrary sized temp buffer for the cipher name. Should be big enough */
1315 char name[80];
1316
1317 if (len > (int)(sizeof(name) - 1))
1318 /* Anyway return 1 so we can parse rest of the list */
1319 return 1;
1320
1321 memcpy(name, elem, len);
1322 name[len] = '\0';
1323
1324 cipher = ssl3_get_cipher_by_std_name(name);
1325 if (cipher == NULL)
1326 /* Ciphersuite not found but return 1 to parse rest of the list */
1327 return 1;
1328
1329 if (!sk_SSL_CIPHER_push(ciphersuites, cipher)) {
1330 ERR_raise(ERR_LIB_SSL, ERR_R_INTERNAL_ERROR);
1331 return 0;
1332 }
1333
1334 return 1;
1335}
1336
1337static __owur int set_ciphersuites(STACK_OF(SSL_CIPHER) **currciphers, const char *str)
1338{
1339 STACK_OF(SSL_CIPHER) *newciphers = sk_SSL_CIPHER_new_null();
1340
1341 if (newciphers == NULL)
1342 return 0;
1343
1344 /* Parse the list. We explicitly allow an empty list */
1345 if (*str != '\0'
1346 && (CONF_parse_list(str, ':', 1, ciphersuite_cb, newciphers) <= 0
1347 || sk_SSL_CIPHER_num(newciphers) == 0)) {
1348 ERR_raise(ERR_LIB_SSL, SSL_R_NO_CIPHER_MATCH);
1349 sk_SSL_CIPHER_free(newciphers);
1350 return 0;
1351 }
1352 sk_SSL_CIPHER_free(*currciphers);
1353 *currciphers = newciphers;
1354
1355 return 1;
1356}
1357
1358static int update_cipher_list_by_id(STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1359 STACK_OF(SSL_CIPHER) *cipherstack)
1360{
1361 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1362
1363 if (tmp_cipher_list == NULL) {
1364 return 0;
1365 }
1366
1367 sk_SSL_CIPHER_free(*cipher_list_by_id);
1368 *cipher_list_by_id = tmp_cipher_list;
1369
1370 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id, ssl_cipher_ptr_id_cmp);
1371 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1372
1373 return 1;
1374}
1375
1376static int update_cipher_list(SSL_CTX *ctx,
1377 STACK_OF(SSL_CIPHER) **cipher_list,
1378 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1379 STACK_OF(SSL_CIPHER) *tls13_ciphersuites)
1380{
1381 int i;
1382 STACK_OF(SSL_CIPHER) *tmp_cipher_list = sk_SSL_CIPHER_dup(*cipher_list);
1383
1384 if (tmp_cipher_list == NULL)
1385 return 0;
1386
1387 /*
1388 * Delete any existing TLSv1.3 ciphersuites. These are always first in the
1389 * list.
1390 */
1391 while (sk_SSL_CIPHER_num(tmp_cipher_list) > 0
1392 && sk_SSL_CIPHER_value(tmp_cipher_list, 0)->min_tls
1393 == TLS1_3_VERSION)
1394 (void)sk_SSL_CIPHER_delete(tmp_cipher_list, 0);
1395
1396 /* Insert the new TLSv1.3 ciphersuites */
1397 for (i = sk_SSL_CIPHER_num(tls13_ciphersuites) - 1; i >= 0; i--) {
1398 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
1399
1400 /* Don't include any TLSv1.3 ciphersuites that are disabled */
1401 if ((sslc->algorithm_enc & ctx->disabled_enc_mask) == 0
1402 && (ssl_cipher_table_mac[sslc->algorithm2
1403 & SSL_HANDSHAKE_MAC_MASK].mask
1404 & ctx->disabled_mac_mask) == 0) {
1405 sk_SSL_CIPHER_unshift(tmp_cipher_list, sslc);
1406 }
1407 }
1408
1409 if (!update_cipher_list_by_id(cipher_list_by_id, tmp_cipher_list)) {
1410 sk_SSL_CIPHER_free(tmp_cipher_list);
1411 return 0;
1412 }
1413
1414 sk_SSL_CIPHER_free(*cipher_list);
1415 *cipher_list = tmp_cipher_list;
1416
1417 return 1;
1418}
1419
1420int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
1421{
1422 int ret = set_ciphersuites(&(ctx->tls13_ciphersuites), str);
1423
1424 if (ret && ctx->cipher_list != NULL)
1425 return update_cipher_list(ctx, &ctx->cipher_list, &ctx->cipher_list_by_id,
1426 ctx->tls13_ciphersuites);
1427
1428 return ret;
1429}
1430
1431int SSL_set_ciphersuites(SSL *s, const char *str)
1432{
1433 STACK_OF(SSL_CIPHER) *cipher_list;
1434 int ret = set_ciphersuites(&(s->tls13_ciphersuites), str);
1435
1436 if (s->cipher_list == NULL) {
1437 if ((cipher_list = SSL_get_ciphers(s)) != NULL)
1438 s->cipher_list = sk_SSL_CIPHER_dup(cipher_list);
1439 }
1440 if (ret && s->cipher_list != NULL)
1441 return update_cipher_list(s->ctx, &s->cipher_list, &s->cipher_list_by_id,
1442 s->tls13_ciphersuites);
1443
1444 return ret;
1445}
1446
1447STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(SSL_CTX *ctx,
1448 STACK_OF(SSL_CIPHER) *tls13_ciphersuites,
1449 STACK_OF(SSL_CIPHER) **cipher_list,
1450 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1451 const char *rule_str,
1452 CERT *c)
1453{
1454 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases, i;
1455 uint32_t disabled_mkey, disabled_auth, disabled_enc, disabled_mac;
1456 STACK_OF(SSL_CIPHER) *cipherstack;
1457 const char *rule_p;
1458 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1459 const SSL_CIPHER **ca_list = NULL;
1460 const SSL_METHOD *ssl_method = ctx->method;
1461
1462 /*
1463 * Return with error if nothing to do.
1464 */
1465 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1466 return NULL;
1467
1468 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1469 return NULL;
1470
1471 /*
1472 * To reduce the work to do we only want to process the compiled
1473 * in algorithms, so we first get the mask of disabled ciphers.
1474 */
1475
1476 disabled_mkey = ctx->disabled_mkey_mask;
1477 disabled_auth = ctx->disabled_auth_mask;
1478 disabled_enc = ctx->disabled_enc_mask;
1479 disabled_mac = ctx->disabled_mac_mask;
1480
1481 /*
1482 * Now we have to collect the available ciphers from the compiled
1483 * in ciphers. We cannot get more than the number compiled in, so
1484 * it is used for allocation.
1485 */
1486 num_of_ciphers = ssl_method->num_ciphers();
1487
1488 co_list = OPENSSL_malloc(sizeof(*co_list) * num_of_ciphers);
1489 if (co_list == NULL) {
1490 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1491 return NULL; /* Failure */
1492 }
1493
1494 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1495 disabled_mkey, disabled_auth, disabled_enc,
1496 disabled_mac, co_list, &head, &tail);
1497
1498 /* Now arrange all ciphers by preference. */
1499
1500 /*
1501 * Everything else being equal, prefer ephemeral ECDH over other key
1502 * exchange mechanisms.
1503 * For consistency, prefer ECDSA over RSA (though this only matters if the
1504 * server has both certificates, and is using the DEFAULT, or a client
1505 * preference).
1506 */
1507 ssl_cipher_apply_rule(0, SSL_kECDHE, SSL_aECDSA, 0, 0, 0, 0, CIPHER_ADD,
1508 -1, &head, &tail);
1509 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head,
1510 &tail);
1511 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head,
1512 &tail);
1513
1514 /* Within each strength group, we prefer GCM over CHACHA... */
1515 ssl_cipher_apply_rule(0, 0, 0, SSL_AESGCM, 0, 0, 0, CIPHER_ADD, -1,
1516 &head, &tail);
1517 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20, 0, 0, 0, CIPHER_ADD, -1,
1518 &head, &tail);
1519
1520 /*
1521 * ...and generally, our preferred cipher is AES.
1522 * Note that AEADs will be bumped to take preference after sorting by
1523 * strength.
1524 */
1525 ssl_cipher_apply_rule(0, 0, 0, SSL_AES ^ SSL_AESGCM, 0, 0, 0, CIPHER_ADD,
1526 -1, &head, &tail);
1527
1528 /* Temporarily enable everything else for sorting */
1529 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1530
1531 /* Low priority for MD5 */
1532 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head,
1533 &tail);
1534
1535 /*
1536 * Move anonymous ciphers to the end. Usually, these will remain
1537 * disabled. (For applications that allow them, they aren't too bad, but
1538 * we prefer authenticated ciphers.)
1539 */
1540 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1541 &tail);
1542
1543 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1544 &tail);
1545 ssl_cipher_apply_rule(0, SSL_kPSK, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head,
1546 &tail);
1547
1548 /* RC4 is sort-of broken -- move to the end */
1549 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head,
1550 &tail);
1551
1552 /*
1553 * Now sort by symmetric encryption strength. The above ordering remains
1554 * in force within each class
1555 */
1556 if (!ssl_cipher_strength_sort(&head, &tail)) {
1557 OPENSSL_free(co_list);
1558 return NULL;
1559 }
1560
1561 /*
1562 * Partially overrule strength sort to prefer TLS 1.2 ciphers/PRFs.
1563 */
1564 ssl_cipher_apply_rule(0, 0, 0, 0, 0, TLS1_2_VERSION, 0, CIPHER_BUMP, -1,
1565 &head, &tail);
1566
1567 /*
1568 * Irrespective of strength, enforce the following order:
1569 * (EC)DHE + AEAD > (EC)DHE > rest of AEAD > rest.
1570 * Within each group, ciphers remain sorted by strength and previous
1571 * preference, i.e.,
1572 * 1) ECDHE > DHE
1573 * 2) GCM > CHACHA
1574 * 3) AES > rest
1575 * 4) TLS 1.2 > legacy
1576 *
1577 * Because we now bump ciphers to the top of the list, we proceed in
1578 * reverse order of preference.
1579 */
1580 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_AEAD, 0, 0, CIPHER_BUMP, -1,
1581 &head, &tail);
1582 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, 0, 0, 0,
1583 CIPHER_BUMP, -1, &head, &tail);
1584 ssl_cipher_apply_rule(0, SSL_kDHE | SSL_kECDHE, 0, 0, SSL_AEAD, 0, 0,
1585 CIPHER_BUMP, -1, &head, &tail);
1586
1587 /* Now disable everything (maintaining the ordering!) */
1588 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1589
1590 /*
1591 * We also need cipher aliases for selecting based on the rule_str.
1592 * There might be two types of entries in the rule_str: 1) names
1593 * of ciphers themselves 2) aliases for groups of ciphers.
1594 * For 1) we need the available ciphers and for 2) the cipher
1595 * groups of cipher_aliases added together in one list (otherwise
1596 * we would be happy with just the cipher_aliases table).
1597 */
1598 num_of_group_aliases = OSSL_NELEM(cipher_aliases);
1599 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1600 ca_list = OPENSSL_malloc(sizeof(*ca_list) * num_of_alias_max);
1601 if (ca_list == NULL) {
1602 OPENSSL_free(co_list);
1603 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1604 return NULL; /* Failure */
1605 }
1606 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1607 disabled_mkey, disabled_auth, disabled_enc,
1608 disabled_mac, head);
1609
1610 /*
1611 * If the rule_string begins with DEFAULT, apply the default rule
1612 * before using the (possibly available) additional rules.
1613 */
1614 ok = 1;
1615 rule_p = rule_str;
1616 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1617 ok = ssl_cipher_process_rulestr(OSSL_default_cipher_list(),
1618 &head, &tail, ca_list, c);
1619 rule_p += 7;
1620 if (*rule_p == ':')
1621 rule_p++;
1622 }
1623
1624 if (ok && (rule_p[0] != '\0'))
1625 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list, c);
1626
1627 OPENSSL_free(ca_list); /* Not needed anymore */
1628
1629 if (!ok) { /* Rule processing failure */
1630 OPENSSL_free(co_list);
1631 return NULL;
1632 }
1633
1634 /*
1635 * Allocate new "cipherstack" for the result, return with error
1636 * if we cannot get one.
1637 */
1638 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1639 OPENSSL_free(co_list);
1640 return NULL;
1641 }
1642
1643 /* Add TLSv1.3 ciphers first - we always prefer those if possible */
1644 for (i = 0; i < sk_SSL_CIPHER_num(tls13_ciphersuites); i++) {
1645 const SSL_CIPHER *sslc = sk_SSL_CIPHER_value(tls13_ciphersuites, i);
1646
1647 /* Don't include any TLSv1.3 ciphers that are disabled */
1648 if ((sslc->algorithm_enc & disabled_enc) != 0
1649 || (ssl_cipher_table_mac[sslc->algorithm2
1650 & SSL_HANDSHAKE_MAC_MASK].mask
1651 & ctx->disabled_mac_mask) != 0) {
1652 sk_SSL_CIPHER_delete(tls13_ciphersuites, i);
1653 i--;
1654 continue;
1655 }
1656
1657 if (!sk_SSL_CIPHER_push(cipherstack, sslc)) {
1658 OPENSSL_free(co_list);
1659 sk_SSL_CIPHER_free(cipherstack);
1660 return NULL;
1661 }
1662 }
1663
1664 OSSL_TRACE_BEGIN(TLS_CIPHER) {
1665 BIO_printf(trc_out, "cipher selection:\n");
1666 }
1667 /*
1668 * The cipher selection for the list is done. The ciphers are added
1669 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1670 */
1671 for (curr = head; curr != NULL; curr = curr->next) {
1672 if (curr->active) {
1673 if (!sk_SSL_CIPHER_push(cipherstack, curr->cipher)) {
1674 OPENSSL_free(co_list);
1675 sk_SSL_CIPHER_free(cipherstack);
1676 OSSL_TRACE_CANCEL(TLS_CIPHER);
1677 return NULL;
1678 }
1679 if (trc_out != NULL)
1680 BIO_printf(trc_out, "<%s>\n", curr->cipher->name);
1681 }
1682 }
1683 OPENSSL_free(co_list); /* Not needed any longer */
1684 OSSL_TRACE_END(TLS_CIPHER);
1685
1686 if (!update_cipher_list_by_id(cipher_list_by_id, cipherstack)) {
1687 sk_SSL_CIPHER_free(cipherstack);
1688 return NULL;
1689 }
1690 sk_SSL_CIPHER_free(*cipher_list);
1691 *cipher_list = cipherstack;
1692
1693 return cipherstack;
1694}
1695
1696char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1697{
1698 const char *ver;
1699 const char *kx, *au, *enc, *mac;
1700 uint32_t alg_mkey, alg_auth, alg_enc, alg_mac;
1701 static const char *format = "%-30s %-7s Kx=%-8s Au=%-5s Enc=%-22s Mac=%-4s\n";
1702
1703 if (buf == NULL) {
1704 len = 128;
1705 if ((buf = OPENSSL_malloc(len)) == NULL) {
1706 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
1707 return NULL;
1708 }
1709 } else if (len < 128) {
1710 return NULL;
1711 }
1712
1713 alg_mkey = cipher->algorithm_mkey;
1714 alg_auth = cipher->algorithm_auth;
1715 alg_enc = cipher->algorithm_enc;
1716 alg_mac = cipher->algorithm_mac;
1717
1718 ver = ssl_protocol_to_string(cipher->min_tls);
1719
1720 switch (alg_mkey) {
1721 case SSL_kRSA:
1722 kx = "RSA";
1723 break;
1724 case SSL_kDHE:
1725 kx = "DH";
1726 break;
1727 case SSL_kECDHE:
1728 kx = "ECDH";
1729 break;
1730 case SSL_kPSK:
1731 kx = "PSK";
1732 break;
1733 case SSL_kRSAPSK:
1734 kx = "RSAPSK";
1735 break;
1736 case SSL_kECDHEPSK:
1737 kx = "ECDHEPSK";
1738 break;
1739 case SSL_kDHEPSK:
1740 kx = "DHEPSK";
1741 break;
1742 case SSL_kSRP:
1743 kx = "SRP";
1744 break;
1745 case SSL_kGOST:
1746 kx = "GOST";
1747 break;
1748 case SSL_kGOST18:
1749 kx = "GOST18";
1750 break;
1751 case SSL_kANY:
1752 kx = "any";
1753 break;
1754 default:
1755 kx = "unknown";
1756 }
1757
1758 switch (alg_auth) {
1759 case SSL_aRSA:
1760 au = "RSA";
1761 break;
1762 case SSL_aDSS:
1763 au = "DSS";
1764 break;
1765 case SSL_aNULL:
1766 au = "None";
1767 break;
1768 case SSL_aECDSA:
1769 au = "ECDSA";
1770 break;
1771 case SSL_aPSK:
1772 au = "PSK";
1773 break;
1774 case SSL_aSRP:
1775 au = "SRP";
1776 break;
1777 case SSL_aGOST01:
1778 au = "GOST01";
1779 break;
1780 /* New GOST ciphersuites have both SSL_aGOST12 and SSL_aGOST01 bits */
1781 case (SSL_aGOST12 | SSL_aGOST01):
1782 au = "GOST12";
1783 break;
1784 case SSL_aANY:
1785 au = "any";
1786 break;
1787 default:
1788 au = "unknown";
1789 break;
1790 }
1791
1792 switch (alg_enc) {
1793 case SSL_DES:
1794 enc = "DES(56)";
1795 break;
1796 case SSL_3DES:
1797 enc = "3DES(168)";
1798 break;
1799 case SSL_RC4:
1800 enc = "RC4(128)";
1801 break;
1802 case SSL_RC2:
1803 enc = "RC2(128)";
1804 break;
1805 case SSL_IDEA:
1806 enc = "IDEA(128)";
1807 break;
1808 case SSL_eNULL:
1809 enc = "None";
1810 break;
1811 case SSL_AES128:
1812 enc = "AES(128)";
1813 break;
1814 case SSL_AES256:
1815 enc = "AES(256)";
1816 break;
1817 case SSL_AES128GCM:
1818 enc = "AESGCM(128)";
1819 break;
1820 case SSL_AES256GCM:
1821 enc = "AESGCM(256)";
1822 break;
1823 case SSL_AES128CCM:
1824 enc = "AESCCM(128)";
1825 break;
1826 case SSL_AES256CCM:
1827 enc = "AESCCM(256)";
1828 break;
1829 case SSL_AES128CCM8:
1830 enc = "AESCCM8(128)";
1831 break;
1832 case SSL_AES256CCM8:
1833 enc = "AESCCM8(256)";
1834 break;
1835 case SSL_CAMELLIA128:
1836 enc = "Camellia(128)";
1837 break;
1838 case SSL_CAMELLIA256:
1839 enc = "Camellia(256)";
1840 break;
1841 case SSL_ARIA128GCM:
1842 enc = "ARIAGCM(128)";
1843 break;
1844 case SSL_ARIA256GCM:
1845 enc = "ARIAGCM(256)";
1846 break;
1847 case SSL_SEED:
1848 enc = "SEED(128)";
1849 break;
1850 case SSL_eGOST2814789CNT:
1851 case SSL_eGOST2814789CNT12:
1852 enc = "GOST89(256)";
1853 break;
1854 case SSL_MAGMA:
1855 enc = "MAGMA";
1856 break;
1857 case SSL_KUZNYECHIK:
1858 enc = "KUZNYECHIK";
1859 break;
1860 case SSL_CHACHA20POLY1305:
1861 enc = "CHACHA20/POLY1305(256)";
1862 break;
1863 default:
1864 enc = "unknown";
1865 break;
1866 }
1867
1868 switch (alg_mac) {
1869 case SSL_MD5:
1870 mac = "MD5";
1871 break;
1872 case SSL_SHA1:
1873 mac = "SHA1";
1874 break;
1875 case SSL_SHA256:
1876 mac = "SHA256";
1877 break;
1878 case SSL_SHA384:
1879 mac = "SHA384";
1880 break;
1881 case SSL_AEAD:
1882 mac = "AEAD";
1883 break;
1884 case SSL_GOST89MAC:
1885 case SSL_GOST89MAC12:
1886 mac = "GOST89";
1887 break;
1888 case SSL_GOST94:
1889 mac = "GOST94";
1890 break;
1891 case SSL_GOST12_256:
1892 case SSL_GOST12_512:
1893 mac = "GOST2012";
1894 break;
1895 default:
1896 mac = "unknown";
1897 break;
1898 }
1899
1900 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac);
1901
1902 return buf;
1903}
1904
1905const char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1906{
1907 if (c == NULL)
1908 return "(NONE)";
1909
1910 /*
1911 * Backwards-compatibility crutch. In almost all contexts we report TLS
1912 * 1.0 as "TLSv1", but for ciphers we report "TLSv1.0".
1913 */
1914 if (c->min_tls == TLS1_VERSION)
1915 return "TLSv1.0";
1916 return ssl_protocol_to_string(c->min_tls);
1917}
1918
1919/* return the actual cipher being used */
1920const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1921{
1922 if (c != NULL)
1923 return c->name;
1924 return "(NONE)";
1925}
1926
1927/* return the actual cipher being used in RFC standard name */
1928const char *SSL_CIPHER_standard_name(const SSL_CIPHER *c)
1929{
1930 if (c != NULL)
1931 return c->stdname;
1932 return "(NONE)";
1933}
1934
1935/* return the OpenSSL name based on given RFC standard name */
1936const char *OPENSSL_cipher_name(const char *stdname)
1937{
1938 const SSL_CIPHER *c;
1939
1940 if (stdname == NULL)
1941 return "(NONE)";
1942 c = ssl3_get_cipher_by_std_name(stdname);
1943 return SSL_CIPHER_get_name(c);
1944}
1945
1946/* number of bits for symmetric cipher */
1947int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1948{
1949 int ret = 0;
1950
1951 if (c != NULL) {
1952 if (alg_bits != NULL)
1953 *alg_bits = (int)c->alg_bits;
1954 ret = (int)c->strength_bits;
1955 }
1956 return ret;
1957}
1958
1959uint32_t SSL_CIPHER_get_id(const SSL_CIPHER *c)
1960{
1961 return c->id;
1962}
1963
1964uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER *c)
1965{
1966 return c->id & 0xFFFF;
1967}
1968
1969SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1970{
1971 SSL_COMP *ctmp;
1972 int i, nn;
1973
1974 if ((n == 0) || (sk == NULL))
1975 return NULL;
1976 nn = sk_SSL_COMP_num(sk);
1977 for (i = 0; i < nn; i++) {
1978 ctmp = sk_SSL_COMP_value(sk, i);
1979 if (ctmp->id == n)
1980 return ctmp;
1981 }
1982 return NULL;
1983}
1984
1985#ifdef OPENSSL_NO_COMP
1986STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1987{
1988 return NULL;
1989}
1990
1991STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
1992 *meths)
1993{
1994 return meths;
1995}
1996
1997int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1998{
1999 return 1;
2000}
2001
2002#else
2003STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
2004{
2005 load_builtin_compressions();
2006 return ssl_comp_methods;
2007}
2008
2009STACK_OF(SSL_COMP) *SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP)
2010 *meths)
2011{
2012 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
2013 ssl_comp_methods = meths;
2014 return old_meths;
2015}
2016
2017static void cmeth_free(SSL_COMP *cm)
2018{
2019 OPENSSL_free(cm);
2020}
2021
2022void ssl_comp_free_compression_methods_int(void)
2023{
2024 STACK_OF(SSL_COMP) *old_meths = ssl_comp_methods;
2025 ssl_comp_methods = NULL;
2026 sk_SSL_COMP_pop_free(old_meths, cmeth_free);
2027}
2028
2029int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
2030{
2031 SSL_COMP *comp;
2032
2033 if (cm == NULL || COMP_get_type(cm) == NID_undef)
2034 return 1;
2035
2036 /*-
2037 * According to draft-ietf-tls-compression-04.txt, the
2038 * compression number ranges should be the following:
2039 *
2040 * 0 to 63: methods defined by the IETF
2041 * 64 to 192: external party methods assigned by IANA
2042 * 193 to 255: reserved for private use
2043 */
2044 if (id < 193 || id > 255) {
2045 ERR_raise(ERR_LIB_SSL, SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
2046 return 1;
2047 }
2048
2049 comp = OPENSSL_malloc(sizeof(*comp));
2050 if (comp == NULL) {
2051 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
2052 return 1;
2053 }
2054
2055 comp->id = id;
2056 comp->method = cm;
2057 load_builtin_compressions();
2058 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
2059 OPENSSL_free(comp);
2060 ERR_raise(ERR_LIB_SSL, SSL_R_DUPLICATE_COMPRESSION_ID);
2061 return 1;
2062 }
2063 if (ssl_comp_methods == NULL || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
2064 OPENSSL_free(comp);
2065 ERR_raise(ERR_LIB_SSL, ERR_R_MALLOC_FAILURE);
2066 return 1;
2067 }
2068 return 0;
2069}
2070#endif
2071
2072const char *SSL_COMP_get_name(const COMP_METHOD *comp)
2073{
2074#ifndef OPENSSL_NO_COMP
2075 return comp ? COMP_get_name(comp) : NULL;
2076#else
2077 return NULL;
2078#endif
2079}
2080
2081const char *SSL_COMP_get0_name(const SSL_COMP *comp)
2082{
2083#ifndef OPENSSL_NO_COMP
2084 return comp->name;
2085#else
2086 return NULL;
2087#endif
2088}
2089
2090int SSL_COMP_get_id(const SSL_COMP *comp)
2091{
2092#ifndef OPENSSL_NO_COMP
2093 return comp->id;
2094#else
2095 return -1;
2096#endif
2097}
2098
2099const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr,
2100 int all)
2101{
2102 const SSL_CIPHER *c = ssl->method->get_cipher_by_char(ptr);
2103
2104 if (c == NULL || (!all && c->valid == 0))
2105 return NULL;
2106 return c;
2107}
2108
2109const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2110{
2111 return ssl->method->get_cipher_by_char(ptr);
2112}
2113
2114int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
2115{
2116 int i;
2117 if (c == NULL)
2118 return NID_undef;
2119 i = ssl_cipher_info_lookup(ssl_cipher_table_cipher, c->algorithm_enc);
2120 if (i == -1)
2121 return NID_undef;
2122 return ssl_cipher_table_cipher[i].nid;
2123}
2124
2125int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
2126{
2127 int i = ssl_cipher_info_lookup(ssl_cipher_table_mac, c->algorithm_mac);
2128
2129 if (i == -1)
2130 return NID_undef;
2131 return ssl_cipher_table_mac[i].nid;
2132}
2133
2134int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
2135{
2136 int i = ssl_cipher_info_lookup(ssl_cipher_table_kx, c->algorithm_mkey);
2137
2138 if (i == -1)
2139 return NID_undef;
2140 return ssl_cipher_table_kx[i].nid;
2141}
2142
2143int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
2144{
2145 int i = ssl_cipher_info_lookup(ssl_cipher_table_auth, c->algorithm_auth);
2146
2147 if (i == -1)
2148 return NID_undef;
2149 return ssl_cipher_table_auth[i].nid;
2150}
2151
2152const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c)
2153{
2154 int idx = c->algorithm2 & SSL_HANDSHAKE_MAC_MASK;
2155
2156 if (idx < 0 || idx >= SSL_MD_NUM_IDX)
2157 return NULL;
2158 return EVP_get_digestbynid(ssl_cipher_table_mac[idx].nid);
2159}
2160
2161int SSL_CIPHER_is_aead(const SSL_CIPHER *c)
2162{
2163 return (c->algorithm_mac & SSL_AEAD) ? 1 : 0;
2164}
2165
2166int ssl_cipher_get_overhead(const SSL_CIPHER *c, size_t *mac_overhead,
2167 size_t *int_overhead, size_t *blocksize,
2168 size_t *ext_overhead)
2169{
2170 size_t mac = 0, in = 0, blk = 0, out = 0;
2171
2172 /* Some hard-coded numbers for the CCM/Poly1305 MAC overhead
2173 * because there are no handy #defines for those. */
2174 if (c->algorithm_enc & (SSL_AESGCM | SSL_ARIAGCM)) {
2175 out = EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
2176 } else if (c->algorithm_enc & (SSL_AES128CCM | SSL_AES256CCM)) {
2177 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 16;
2178 } else if (c->algorithm_enc & (SSL_AES128CCM8 | SSL_AES256CCM8)) {
2179 out = EVP_CCM_TLS_EXPLICIT_IV_LEN + 8;
2180 } else if (c->algorithm_enc & SSL_CHACHA20POLY1305) {
2181 out = 16;
2182 } else if (c->algorithm_mac & SSL_AEAD) {
2183 /* We're supposed to have handled all the AEAD modes above */
2184 return 0;
2185 } else {
2186 /* Non-AEAD modes. Calculate MAC/cipher overhead separately */
2187 int digest_nid = SSL_CIPHER_get_digest_nid(c);
2188 const EVP_MD *e_md = EVP_get_digestbynid(digest_nid);
2189
2190 if (e_md == NULL)
2191 return 0;
2192
2193 mac = EVP_MD_get_size(e_md);
2194 if (c->algorithm_enc != SSL_eNULL) {
2195 int cipher_nid = SSL_CIPHER_get_cipher_nid(c);
2196 const EVP_CIPHER *e_ciph = EVP_get_cipherbynid(cipher_nid);
2197
2198 /* If it wasn't AEAD or SSL_eNULL, we expect it to be a
2199 known CBC cipher. */
2200 if (e_ciph == NULL ||
2201 EVP_CIPHER_get_mode(e_ciph) != EVP_CIPH_CBC_MODE)
2202 return 0;
2203
2204 in = 1; /* padding length byte */
2205 out = EVP_CIPHER_get_iv_length(e_ciph);
2206 blk = EVP_CIPHER_get_block_size(e_ciph);
2207 }
2208 }
2209
2210 *mac_overhead = mac;
2211 *int_overhead = in;
2212 *blocksize = blk;
2213 *ext_overhead = out;
2214
2215 return 1;
2216}
2217
2218int ssl_cert_is_disabled(SSL_CTX *ctx, size_t idx)
2219{
2220 const SSL_CERT_LOOKUP *cl = ssl_cert_lookup_by_idx(idx);
2221
2222 if (cl == NULL || (cl->amask & ctx->disabled_auth_mask) != 0)
2223 return 1;
2224 return 0;
2225}
2226
2227/*
2228 * Default list of TLSv1.2 (and earlier) ciphers
2229 * SSL_DEFAULT_CIPHER_LIST deprecated in 3.0.0
2230 * Update both macro and function simultaneously
2231 */
2232const char *OSSL_default_cipher_list(void)
2233{
2234 return "ALL:!COMPLEMENTOFDEFAULT:!eNULL";
2235}
2236
2237/*
2238 * Default list of TLSv1.3 (and later) ciphers
2239 * TLS_DEFAULT_CIPHERSUITES deprecated in 3.0.0
2240 * Update both macro and function simultaneously
2241 */
2242const char *OSSL_default_ciphersuites(void)
2243{
2244 return "TLS_AES_256_GCM_SHA384:"
2245 "TLS_CHACHA20_POLY1305_SHA256:"
2246 "TLS_AES_128_GCM_SHA256";
2247}
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette