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authorcvs2svn <admin@example.com>2016-07-23 19:31:36 +0000
committercvs2svn <admin@example.com>2016-07-23 19:31:36 +0000
commit86c49b31af735796dfde37aa29473a30d36367db (patch)
treee9a354a92a348338fe2b361e2eda703cae23cfab /src/lib/libssl/ssl_ciph.c
parent19d5fe348e8926bac4521c5807aa64c45b8f7a41 (diff)
downloadopenbsd-OPENBSD_6_0_BASE.tar.gz
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This commit was manufactured by cvs2git to create tag 'OPENBSD_6_0_BASE'.OPENBSD_6_0_BASE
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1/* $OpenBSD: ssl_ciph.c,v 1.86 2016/04/28 16:39:45 jsing Exp $ */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58/* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111/* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116/* ====================================================================
117 * Copyright 2005 Nokia. All rights reserved.
118 *
119 * The portions of the attached software ("Contribution") is developed by
120 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
121 * license.
122 *
123 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
124 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
125 * support (see RFC 4279) to OpenSSL.
126 *
127 * No patent licenses or other rights except those expressly stated in
128 * the OpenSSL open source license shall be deemed granted or received
129 * expressly, by implication, estoppel, or otherwise.
130 *
131 * No assurances are provided by Nokia that the Contribution does not
132 * infringe the patent or other intellectual property rights of any third
133 * party or that the license provides you with all the necessary rights
134 * to make use of the Contribution.
135 *
136 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
137 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
138 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
139 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
140 * OTHERWISE.
141 */
142
143#include <stdio.h>
144
145#include <openssl/objects.h>
146
147#ifndef OPENSSL_NO_ENGINE
148#include <openssl/engine.h>
149#endif
150
151#include "ssl_locl.h"
152
153#define SSL_ENC_DES_IDX 0
154#define SSL_ENC_3DES_IDX 1
155#define SSL_ENC_RC4_IDX 2
156#define SSL_ENC_IDEA_IDX 3
157#define SSL_ENC_NULL_IDX 4
158#define SSL_ENC_AES128_IDX 5
159#define SSL_ENC_AES256_IDX 6
160#define SSL_ENC_CAMELLIA128_IDX 7
161#define SSL_ENC_CAMELLIA256_IDX 8
162#define SSL_ENC_GOST89_IDX 9
163#define SSL_ENC_AES128GCM_IDX 10
164#define SSL_ENC_AES256GCM_IDX 11
165#define SSL_ENC_NUM_IDX 12
166
167
168static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
169 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
170};
171
172#define SSL_MD_MD5_IDX 0
173#define SSL_MD_SHA1_IDX 1
174#define SSL_MD_GOST94_IDX 2
175#define SSL_MD_GOST89MAC_IDX 3
176#define SSL_MD_SHA256_IDX 4
177#define SSL_MD_SHA384_IDX 5
178#define SSL_MD_STREEBOG256_IDX 6
179#define SSL_MD_STREEBOG512_IDX 7
180/*Constant SSL_MAX_DIGEST equal to size of digests array should be
181 * defined in the
182 * ssl_locl.h */
183#define SSL_MD_NUM_IDX SSL_MAX_DIGEST
184static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
185 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
186};
187
188static int ssl_mac_pkey_id[SSL_MD_NUM_IDX] = {
189 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_GOSTIMIT,
190 EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC, EVP_PKEY_HMAC,
191};
192
193static int ssl_mac_secret_size[SSL_MD_NUM_IDX] = {
194 0, 0, 0, 0, 0, 0, 0, 0
195};
196
197static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX] = {
198 SSL_HANDSHAKE_MAC_MD5, SSL_HANDSHAKE_MAC_SHA,
199 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
200 SSL_HANDSHAKE_MAC_SHA384, SSL_HANDSHAKE_MAC_STREEBOG256,
201 SSL_HANDSHAKE_MAC_STREEBOG512
202};
203
204#define CIPHER_ADD 1
205#define CIPHER_KILL 2
206#define CIPHER_DEL 3
207#define CIPHER_ORD 4
208#define CIPHER_SPECIAL 5
209
210typedef struct cipher_order_st {
211 const SSL_CIPHER *cipher;
212 int active;
213 int dead;
214 struct cipher_order_st *next, *prev;
215} CIPHER_ORDER;
216
217static const SSL_CIPHER cipher_aliases[] = {
218
219 /* "ALL" doesn't include eNULL (must be specifically enabled) */
220 {
221 .name = SSL_TXT_ALL,
222 .algorithm_enc = ~SSL_eNULL,
223 },
224
225 /* "COMPLEMENTOFALL" */
226 {
227 .name = SSL_TXT_CMPALL,
228 .algorithm_enc = SSL_eNULL,
229 },
230
231 /*
232 * "COMPLEMENTOFDEFAULT"
233 * (does *not* include ciphersuites not found in ALL!)
234 */
235 {
236 .name = SSL_TXT_CMPDEF,
237 .algorithm_mkey = SSL_kDHE|SSL_kECDHE,
238 .algorithm_auth = SSL_aNULL,
239 .algorithm_enc = ~SSL_eNULL,
240 },
241
242 /*
243 * key exchange aliases
244 * (some of those using only a single bit here combine multiple key
245 * exchange algs according to the RFCs, e.g. kEDH combines DHE_DSS
246 * and DHE_RSA)
247 */
248 {
249 .name = SSL_TXT_kRSA,
250 .algorithm_mkey = SSL_kRSA,
251 },
252 {
253 .name = SSL_TXT_kEDH,
254 .algorithm_mkey = SSL_kDHE,
255 },
256 {
257 .name = SSL_TXT_DH,
258 .algorithm_mkey = SSL_kDHE,
259 },
260
261 {
262 .name = SSL_TXT_kECDHr,
263 .algorithm_mkey = SSL_kECDHr,
264 },
265 {
266 .name = SSL_TXT_kECDHe,
267 .algorithm_mkey = SSL_kECDHe,
268 },
269 {
270 .name = SSL_TXT_kECDH,
271 .algorithm_mkey = SSL_kECDHr|SSL_kECDHe,
272 },
273 {
274 .name = SSL_TXT_kEECDH,
275 .algorithm_mkey = SSL_kECDHE,
276 },
277 {
278 .name = SSL_TXT_ECDH,
279 .algorithm_mkey = SSL_kECDHr|SSL_kECDHe|SSL_kECDHE,
280 },
281
282 {
283 .name = SSL_TXT_kGOST,
284 .algorithm_mkey = SSL_kGOST,
285 },
286
287 /* server authentication aliases */
288 {
289 .name = SSL_TXT_aRSA,
290 .algorithm_auth = SSL_aRSA,
291 },
292 {
293 .name = SSL_TXT_aDSS,
294 .algorithm_auth = SSL_aDSS,
295 },
296 {
297 .name = SSL_TXT_DSS,
298 .algorithm_auth = SSL_aDSS,
299 },
300 {
301 .name = SSL_TXT_aNULL,
302 .algorithm_auth = SSL_aNULL,
303 },
304 {
305 .name = SSL_TXT_aECDH,
306 .algorithm_auth = SSL_aECDH,
307 },
308 {
309 .name = SSL_TXT_aECDSA,
310 .algorithm_auth = SSL_aECDSA,
311 },
312 {
313 .name = SSL_TXT_ECDSA,
314 .algorithm_auth = SSL_aECDSA,
315 },
316 {
317 .name = SSL_TXT_aGOST01,
318 .algorithm_auth = SSL_aGOST01,
319 },
320 {
321 .name = SSL_TXT_aGOST,
322 .algorithm_auth = SSL_aGOST01,
323 },
324
325 /* aliases combining key exchange and server authentication */
326 {
327 .name = SSL_TXT_DHE,
328 .algorithm_mkey = SSL_kDHE,
329 .algorithm_auth = ~SSL_aNULL,
330 },
331 {
332 .name = SSL_TXT_EDH,
333 .algorithm_mkey = SSL_kDHE,
334 .algorithm_auth = ~SSL_aNULL,
335 },
336 {
337 .name = SSL_TXT_ECDHE,
338 .algorithm_mkey = SSL_kECDHE,
339 .algorithm_auth = ~SSL_aNULL,
340 },
341 {
342 .name = SSL_TXT_EECDH,
343 .algorithm_mkey = SSL_kECDHE,
344 .algorithm_auth = ~SSL_aNULL,
345 },
346 {
347 .name = SSL_TXT_NULL,
348 .algorithm_enc = SSL_eNULL,
349 },
350 {
351 .name = SSL_TXT_RSA,
352 .algorithm_mkey = SSL_kRSA,
353 .algorithm_auth = SSL_aRSA,
354 },
355 {
356 .name = SSL_TXT_ADH,
357 .algorithm_mkey = SSL_kDHE,
358 .algorithm_auth = SSL_aNULL,
359 },
360 {
361 .name = SSL_TXT_AECDH,
362 .algorithm_mkey = SSL_kECDHE,
363 .algorithm_auth = SSL_aNULL,
364 },
365
366 /* symmetric encryption aliases */
367 {
368 .name = SSL_TXT_DES,
369 .algorithm_enc = SSL_DES,
370 },
371 {
372 .name = SSL_TXT_3DES,
373 .algorithm_enc = SSL_3DES,
374 },
375 {
376 .name = SSL_TXT_RC4,
377 .algorithm_enc = SSL_RC4,
378 },
379 {
380 .name = SSL_TXT_IDEA,
381 .algorithm_enc = SSL_IDEA,
382 },
383 {
384 .name = SSL_TXT_eNULL,
385 .algorithm_enc = SSL_eNULL,
386 },
387 {
388 .name = SSL_TXT_AES128,
389 .algorithm_enc = SSL_AES128|SSL_AES128GCM,
390 },
391 {
392 .name = SSL_TXT_AES256,
393 .algorithm_enc = SSL_AES256|SSL_AES256GCM,
394 },
395 {
396 .name = SSL_TXT_AES,
397 .algorithm_enc = SSL_AES,
398 },
399 {
400 .name = SSL_TXT_AES_GCM,
401 .algorithm_enc = SSL_AES128GCM|SSL_AES256GCM,
402 },
403 {
404 .name = SSL_TXT_CAMELLIA128,
405 .algorithm_enc = SSL_CAMELLIA128,
406 },
407 {
408 .name = SSL_TXT_CAMELLIA256,
409 .algorithm_enc = SSL_CAMELLIA256,
410 },
411 {
412 .name = SSL_TXT_CAMELLIA,
413 .algorithm_enc = SSL_CAMELLIA128|SSL_CAMELLIA256,
414 },
415 {
416 .name = SSL_TXT_CHACHA20,
417 .algorithm_enc = SSL_CHACHA20POLY1305|SSL_CHACHA20POLY1305_OLD,
418 },
419
420 /* MAC aliases */
421 {
422 .name = SSL_TXT_AEAD,
423 .algorithm_mac = SSL_AEAD,
424 },
425 {
426 .name = SSL_TXT_MD5,
427 .algorithm_mac = SSL_MD5,
428 },
429 {
430 .name = SSL_TXT_SHA1,
431 .algorithm_mac = SSL_SHA1,
432 },
433 {
434 .name = SSL_TXT_SHA,
435 .algorithm_mac = SSL_SHA1,
436 },
437 {
438 .name = SSL_TXT_GOST94,
439 .algorithm_mac = SSL_GOST94,
440 },
441 {
442 .name = SSL_TXT_GOST89MAC,
443 .algorithm_mac = SSL_GOST89MAC,
444 },
445 {
446 .name = SSL_TXT_SHA256,
447 .algorithm_mac = SSL_SHA256,
448 },
449 {
450 .name = SSL_TXT_SHA384,
451 .algorithm_mac = SSL_SHA384,
452 },
453 {
454 .name = SSL_TXT_STREEBOG256,
455 .algorithm_mac = SSL_STREEBOG256,
456 },
457 {
458 .name = SSL_TXT_STREEBOG512,
459 .algorithm_mac = SSL_STREEBOG512,
460 },
461
462 /* protocol version aliases */
463 {
464 .name = SSL_TXT_SSLV3,
465 .algorithm_ssl = SSL_SSLV3,
466 },
467 {
468 .name = SSL_TXT_TLSV1,
469 .algorithm_ssl = SSL_TLSV1,
470 },
471 {
472 .name = SSL_TXT_TLSV1_2,
473 .algorithm_ssl = SSL_TLSV1_2,
474 },
475
476 /* strength classes */
477 {
478 .name = SSL_TXT_LOW,
479 .algo_strength = SSL_LOW,
480 },
481 {
482 .name = SSL_TXT_MEDIUM,
483 .algo_strength = SSL_MEDIUM,
484 },
485 {
486 .name = SSL_TXT_HIGH,
487 .algo_strength = SSL_HIGH,
488 },
489};
490
491void
492ssl_load_ciphers(void)
493{
494 ssl_cipher_methods[SSL_ENC_DES_IDX] =
495 EVP_get_cipherbyname(SN_des_cbc);
496 ssl_cipher_methods[SSL_ENC_3DES_IDX] =
497 EVP_get_cipherbyname(SN_des_ede3_cbc);
498 ssl_cipher_methods[SSL_ENC_RC4_IDX] =
499 EVP_get_cipherbyname(SN_rc4);
500#ifndef OPENSSL_NO_IDEA
501 ssl_cipher_methods[SSL_ENC_IDEA_IDX] =
502 EVP_get_cipherbyname(SN_idea_cbc);
503#else
504 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL;
505#endif
506 ssl_cipher_methods[SSL_ENC_AES128_IDX] =
507 EVP_get_cipherbyname(SN_aes_128_cbc);
508 ssl_cipher_methods[SSL_ENC_AES256_IDX] =
509 EVP_get_cipherbyname(SN_aes_256_cbc);
510 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] =
511 EVP_get_cipherbyname(SN_camellia_128_cbc);
512 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] =
513 EVP_get_cipherbyname(SN_camellia_256_cbc);
514 ssl_cipher_methods[SSL_ENC_GOST89_IDX] =
515 EVP_get_cipherbyname(SN_gost89_cnt);
516
517 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] =
518 EVP_get_cipherbyname(SN_aes_128_gcm);
519 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] =
520 EVP_get_cipherbyname(SN_aes_256_gcm);
521
522 ssl_digest_methods[SSL_MD_MD5_IDX] =
523 EVP_get_digestbyname(SN_md5);
524 ssl_mac_secret_size[SSL_MD_MD5_IDX] =
525 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
526 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
527 ssl_digest_methods[SSL_MD_SHA1_IDX] =
528 EVP_get_digestbyname(SN_sha1);
529 ssl_mac_secret_size[SSL_MD_SHA1_IDX] =
530 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
531 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
532 ssl_digest_methods[SSL_MD_GOST94_IDX] =
533 EVP_get_digestbyname(SN_id_GostR3411_94);
534 if (ssl_digest_methods[SSL_MD_GOST94_IDX]) {
535 ssl_mac_secret_size[SSL_MD_GOST94_IDX] =
536 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
537 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
538 }
539 ssl_digest_methods[SSL_MD_GOST89MAC_IDX] =
540 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
541 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
542 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX] = 32;
543 }
544
545 ssl_digest_methods[SSL_MD_SHA256_IDX] =
546 EVP_get_digestbyname(SN_sha256);
547 ssl_mac_secret_size[SSL_MD_SHA256_IDX] =
548 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
549 ssl_digest_methods[SSL_MD_SHA384_IDX] =
550 EVP_get_digestbyname(SN_sha384);
551 ssl_mac_secret_size[SSL_MD_SHA384_IDX] =
552 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
553 ssl_digest_methods[SSL_MD_STREEBOG256_IDX] =
554 EVP_get_digestbyname(SN_id_tc26_gost3411_2012_256);
555 ssl_mac_secret_size[SSL_MD_STREEBOG256_IDX] =
556 EVP_MD_size(ssl_digest_methods[SSL_MD_STREEBOG256_IDX]);
557 ssl_digest_methods[SSL_MD_STREEBOG512_IDX] =
558 EVP_get_digestbyname(SN_id_tc26_gost3411_2012_512);
559 ssl_mac_secret_size[SSL_MD_STREEBOG512_IDX] =
560 EVP_MD_size(ssl_digest_methods[SSL_MD_STREEBOG512_IDX]);
561}
562
563int
564ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
565 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
566{
567 const SSL_CIPHER *c;
568 int i;
569
570 c = s->cipher;
571 if (c == NULL)
572 return (0);
573
574 /*
575 * This function does not handle EVP_AEAD.
576 * See ssl_cipher_get_aead_evp instead.
577 */
578 if (c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD)
579 return(0);
580
581 if ((enc == NULL) || (md == NULL))
582 return (0);
583
584 switch (c->algorithm_enc) {
585 case SSL_DES:
586 i = SSL_ENC_DES_IDX;
587 break;
588 case SSL_3DES:
589 i = SSL_ENC_3DES_IDX;
590 break;
591 case SSL_RC4:
592 i = SSL_ENC_RC4_IDX;
593 break;
594 case SSL_IDEA:
595 i = SSL_ENC_IDEA_IDX;
596 break;
597 case SSL_eNULL:
598 i = SSL_ENC_NULL_IDX;
599 break;
600 case SSL_AES128:
601 i = SSL_ENC_AES128_IDX;
602 break;
603 case SSL_AES256:
604 i = SSL_ENC_AES256_IDX;
605 break;
606 case SSL_CAMELLIA128:
607 i = SSL_ENC_CAMELLIA128_IDX;
608 break;
609 case SSL_CAMELLIA256:
610 i = SSL_ENC_CAMELLIA256_IDX;
611 break;
612 case SSL_eGOST2814789CNT:
613 i = SSL_ENC_GOST89_IDX;
614 break;
615 case SSL_AES128GCM:
616 i = SSL_ENC_AES128GCM_IDX;
617 break;
618 case SSL_AES256GCM:
619 i = SSL_ENC_AES256GCM_IDX;
620 break;
621 default:
622 i = -1;
623 break;
624 }
625
626 if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
627 *enc = NULL;
628 else {
629 if (i == SSL_ENC_NULL_IDX)
630 *enc = EVP_enc_null();
631 else
632 *enc = ssl_cipher_methods[i];
633 }
634
635 switch (c->algorithm_mac) {
636 case SSL_MD5:
637 i = SSL_MD_MD5_IDX;
638 break;
639 case SSL_SHA1:
640 i = SSL_MD_SHA1_IDX;
641 break;
642 case SSL_SHA256:
643 i = SSL_MD_SHA256_IDX;
644 break;
645 case SSL_SHA384:
646 i = SSL_MD_SHA384_IDX;
647 break;
648 case SSL_GOST94:
649 i = SSL_MD_GOST94_IDX;
650 break;
651 case SSL_GOST89MAC:
652 i = SSL_MD_GOST89MAC_IDX;
653 break;
654 case SSL_STREEBOG256:
655 i = SSL_MD_STREEBOG256_IDX;
656 break;
657 case SSL_STREEBOG512:
658 i = SSL_MD_STREEBOG512_IDX;
659 break;
660 default:
661 i = -1;
662 break;
663 }
664 if ((i < 0) || (i >= SSL_MD_NUM_IDX)) {
665 *md = NULL;
666
667 if (mac_pkey_type != NULL)
668 *mac_pkey_type = NID_undef;
669 if (mac_secret_size != NULL)
670 *mac_secret_size = 0;
671 if (c->algorithm_mac == SSL_AEAD)
672 mac_pkey_type = NULL;
673 } else {
674 *md = ssl_digest_methods[i];
675 if (mac_pkey_type != NULL)
676 *mac_pkey_type = ssl_mac_pkey_id[i];
677 if (mac_secret_size != NULL)
678 *mac_secret_size = ssl_mac_secret_size[i];
679 }
680
681 if ((*enc != NULL) &&
682 (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
683 (!mac_pkey_type || *mac_pkey_type != NID_undef)) {
684 const EVP_CIPHER *evp;
685
686 if (s->ssl_version >> 8 != TLS1_VERSION_MAJOR ||
687 s->ssl_version < TLS1_VERSION)
688 return 1;
689
690 if (c->algorithm_enc == SSL_RC4 &&
691 c->algorithm_mac == SSL_MD5 &&
692 (evp = EVP_get_cipherbyname("RC4-HMAC-MD5")))
693 *enc = evp, *md = NULL;
694 else if (c->algorithm_enc == SSL_AES128 &&
695 c->algorithm_mac == SSL_SHA1 &&
696 (evp = EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
697 *enc = evp, *md = NULL;
698 else if (c->algorithm_enc == SSL_AES256 &&
699 c->algorithm_mac == SSL_SHA1 &&
700 (evp = EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
701 *enc = evp, *md = NULL;
702 return (1);
703 } else
704 return (0);
705}
706
707/*
708 * ssl_cipher_get_evp_aead sets aead to point to the correct EVP_AEAD object
709 * for s->cipher. It returns 1 on success and 0 on error.
710 */
711int
712ssl_cipher_get_evp_aead(const SSL_SESSION *s, const EVP_AEAD **aead)
713{
714 const SSL_CIPHER *c = s->cipher;
715
716 *aead = NULL;
717
718 if (c == NULL)
719 return 0;
720 if ((c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD) == 0)
721 return 0;
722
723 switch (c->algorithm_enc) {
724#ifndef OPENSSL_NO_AES
725 case SSL_AES128GCM:
726 *aead = EVP_aead_aes_128_gcm();
727 return 1;
728 case SSL_AES256GCM:
729 *aead = EVP_aead_aes_256_gcm();
730 return 1;
731#endif
732#if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
733 case SSL_CHACHA20POLY1305:
734 *aead = EVP_aead_chacha20_poly1305();
735 return 1;
736 case SSL_CHACHA20POLY1305_OLD:
737 *aead = EVP_aead_chacha20_poly1305_old();
738 return 1;
739#endif
740 default:
741 break;
742 }
743 return 0;
744}
745
746int
747ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
748{
749 if (idx < 0 || idx >= SSL_MD_NUM_IDX) {
750 return 0;
751 }
752 *mask = ssl_handshake_digest_flag[idx];
753 if (*mask)
754 *md = ssl_digest_methods[idx];
755 else
756 *md = NULL;
757 return 1;
758}
759
760#define ITEM_SEP(a) \
761 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
762
763static void
764ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
765 CIPHER_ORDER **tail)
766{
767 if (curr == *tail)
768 return;
769 if (curr == *head)
770 *head = curr->next;
771 if (curr->prev != NULL)
772 curr->prev->next = curr->next;
773 if (curr->next != NULL)
774 curr->next->prev = curr->prev;
775 (*tail)->next = curr;
776 curr->prev= *tail;
777 curr->next = NULL;
778 *tail = curr;
779}
780
781static void
782ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
783 CIPHER_ORDER **tail)
784{
785 if (curr == *head)
786 return;
787 if (curr == *tail)
788 *tail = curr->prev;
789 if (curr->next != NULL)
790 curr->next->prev = curr->prev;
791 if (curr->prev != NULL)
792 curr->prev->next = curr->next;
793 (*head)->prev = curr;
794 curr->next= *head;
795 curr->prev = NULL;
796 *head = curr;
797}
798
799static void
800ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth,
801 unsigned long *enc, unsigned long *mac, unsigned long *ssl)
802{
803 *mkey = 0;
804 *auth = 0;
805 *enc = 0;
806 *mac = 0;
807 *ssl = 0;
808
809 /*
810 * Check for the availability of GOST 34.10 public/private key
811 * algorithms. If they are not available disable the associated
812 * authentication and key exchange algorithms.
813 */
814 if (EVP_PKEY_meth_find(NID_id_GostR3410_2001) == NULL) {
815 *auth |= SSL_aGOST01;
816 *mkey |= SSL_kGOST;
817 }
818
819#ifdef SSL_FORBID_ENULL
820 *enc |= SSL_eNULL;
821#endif
822
823 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES : 0;
824 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0;
825 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 : 0;
826 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0;
827 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128 : 0;
828 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256 : 0;
829 *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM : 0;
830 *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM : 0;
831 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128 : 0;
832 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256 : 0;
833 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT : 0;
834
835 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 : 0;
836 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0;
837 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256 : 0;
838 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384 : 0;
839 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94 : 0;
840 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL) ? SSL_GOST89MAC : 0;
841 *mac |= (ssl_digest_methods[SSL_MD_STREEBOG256_IDX] == NULL) ? SSL_STREEBOG256 : 0;
842 *mac |= (ssl_digest_methods[SSL_MD_STREEBOG512_IDX] == NULL) ? SSL_STREEBOG512 : 0;
843
844}
845
846static void
847ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, int num_of_ciphers,
848 unsigned long disabled_mkey, unsigned long disabled_auth,
849 unsigned long disabled_enc, unsigned long disabled_mac,
850 unsigned long disabled_ssl, CIPHER_ORDER *co_list,
851 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
852{
853 int i, co_list_num;
854 const SSL_CIPHER *c;
855
856 /*
857 * We have num_of_ciphers descriptions compiled in, depending on the
858 * method selected (SSLv3, TLSv1, etc). These will later be sorted in
859 * a linked list with at most num entries.
860 */
861
862 /* Get the initial list of ciphers */
863 co_list_num = 0; /* actual count of ciphers */
864 for (i = 0; i < num_of_ciphers; i++) {
865 c = ssl_method->get_cipher(i);
866 /* drop those that use any of that is not available */
867 if ((c != NULL) && c->valid &&
868 !(c->algorithm_mkey & disabled_mkey) &&
869 !(c->algorithm_auth & disabled_auth) &&
870 !(c->algorithm_enc & disabled_enc) &&
871 !(c->algorithm_mac & disabled_mac) &&
872 !(c->algorithm_ssl & disabled_ssl)) {
873 co_list[co_list_num].cipher = c;
874 co_list[co_list_num].next = NULL;
875 co_list[co_list_num].prev = NULL;
876 co_list[co_list_num].active = 0;
877 co_list_num++;
878 /*
879 if (!sk_push(ca_list,(char *)c)) goto err;
880 */
881 }
882 }
883
884 /*
885 * Prepare linked list from list entries
886 */
887 if (co_list_num > 0) {
888 co_list[0].prev = NULL;
889
890 if (co_list_num > 1) {
891 co_list[0].next = &co_list[1];
892
893 for (i = 1; i < co_list_num - 1; i++) {
894 co_list[i].prev = &co_list[i - 1];
895 co_list[i].next = &co_list[i + 1];
896 }
897
898 co_list[co_list_num - 1].prev =
899 &co_list[co_list_num - 2];
900 }
901
902 co_list[co_list_num - 1].next = NULL;
903
904 *head_p = &co_list[0];
905 *tail_p = &co_list[co_list_num - 1];
906 }
907}
908
909static void
910ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, int num_of_group_aliases,
911 unsigned long disabled_mkey, unsigned long disabled_auth,
912 unsigned long disabled_enc, unsigned long disabled_mac,
913 unsigned long disabled_ssl, CIPHER_ORDER *head)
914{
915 CIPHER_ORDER *ciph_curr;
916 const SSL_CIPHER **ca_curr;
917 int i;
918 unsigned long mask_mkey = ~disabled_mkey;
919 unsigned long mask_auth = ~disabled_auth;
920 unsigned long mask_enc = ~disabled_enc;
921 unsigned long mask_mac = ~disabled_mac;
922 unsigned long mask_ssl = ~disabled_ssl;
923
924 /*
925 * First, add the real ciphers as already collected
926 */
927 ciph_curr = head;
928 ca_curr = ca_list;
929 while (ciph_curr != NULL) {
930 *ca_curr = ciph_curr->cipher;
931 ca_curr++;
932 ciph_curr = ciph_curr->next;
933 }
934
935 /*
936 * Now we add the available ones from the cipher_aliases[] table.
937 * They represent either one or more algorithms, some of which
938 * in any affected category must be supported (set in enabled_mask),
939 * or represent a cipher strength value (will be added in any case because algorithms=0).
940 */
941 for (i = 0; i < num_of_group_aliases; i++) {
942 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
943 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
944 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
945 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
946 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
947
948 if (algorithm_mkey)
949 if ((algorithm_mkey & mask_mkey) == 0)
950 continue;
951
952 if (algorithm_auth)
953 if ((algorithm_auth & mask_auth) == 0)
954 continue;
955
956 if (algorithm_enc)
957 if ((algorithm_enc & mask_enc) == 0)
958 continue;
959
960 if (algorithm_mac)
961 if ((algorithm_mac & mask_mac) == 0)
962 continue;
963
964 if (algorithm_ssl)
965 if ((algorithm_ssl & mask_ssl) == 0)
966 continue;
967
968 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
969 ca_curr++;
970 }
971
972 *ca_curr = NULL; /* end of list */
973}
974
975static void
976ssl_cipher_apply_rule(unsigned long cipher_id, unsigned long alg_mkey,
977 unsigned long alg_auth, unsigned long alg_enc, unsigned long alg_mac,
978 unsigned long alg_ssl, unsigned long algo_strength,
979 int rule, int strength_bits, CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
980{
981 CIPHER_ORDER *head, *tail, *curr, *next, *last;
982 const SSL_CIPHER *cp;
983 int reverse = 0;
984
985
986 if (rule == CIPHER_DEL)
987 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
988
989 head = *head_p;
990 tail = *tail_p;
991
992 if (reverse) {
993 next = tail;
994 last = head;
995 } else {
996 next = head;
997 last = tail;
998 }
999
1000 curr = NULL;
1001 for (;;) {
1002 if (curr == last)
1003 break;
1004 curr = next;
1005 next = reverse ? curr->prev : curr->next;
1006
1007 cp = curr->cipher;
1008
1009 /*
1010 * Selection criteria is either the value of strength_bits
1011 * or the algorithms used.
1012 */
1013 if (strength_bits >= 0) {
1014 if (strength_bits != cp->strength_bits)
1015 continue;
1016 } else {
1017
1018 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1019 continue;
1020 if (alg_auth && !(alg_auth & cp->algorithm_auth))
1021 continue;
1022 if (alg_enc && !(alg_enc & cp->algorithm_enc))
1023 continue;
1024 if (alg_mac && !(alg_mac & cp->algorithm_mac))
1025 continue;
1026 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1027 continue;
1028 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1029 continue;
1030 }
1031
1032
1033 /* add the cipher if it has not been added yet. */
1034 if (rule == CIPHER_ADD) {
1035 /* reverse == 0 */
1036 if (!curr->active) {
1037 ll_append_tail(&head, curr, &tail);
1038 curr->active = 1;
1039 }
1040 }
1041 /* Move the added cipher to this location */
1042 else if (rule == CIPHER_ORD) {
1043 /* reverse == 0 */
1044 if (curr->active) {
1045 ll_append_tail(&head, curr, &tail);
1046 }
1047 } else if (rule == CIPHER_DEL) {
1048 /* reverse == 1 */
1049 if (curr->active) {
1050 /* most recently deleted ciphersuites get best positions
1051 * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1052 * works in reverse to maintain the order) */
1053 ll_append_head(&head, curr, &tail);
1054 curr->active = 0;
1055 }
1056 } else if (rule == CIPHER_KILL) {
1057 /* reverse == 0 */
1058 if (head == curr)
1059 head = curr->next;
1060 else
1061 curr->prev->next = curr->next;
1062 if (tail == curr)
1063 tail = curr->prev;
1064 curr->active = 0;
1065 if (curr->next != NULL)
1066 curr->next->prev = curr->prev;
1067 if (curr->prev != NULL)
1068 curr->prev->next = curr->next;
1069 curr->next = NULL;
1070 curr->prev = NULL;
1071 }
1072 }
1073
1074 *head_p = head;
1075 *tail_p = tail;
1076}
1077
1078static int
1079ssl_cipher_strength_sort(CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
1080{
1081 int max_strength_bits, i, *number_uses;
1082 CIPHER_ORDER *curr;
1083
1084 /*
1085 * This routine sorts the ciphers with descending strength. The sorting
1086 * must keep the pre-sorted sequence, so we apply the normal sorting
1087 * routine as '+' movement to the end of the list.
1088 */
1089 max_strength_bits = 0;
1090 curr = *head_p;
1091 while (curr != NULL) {
1092 if (curr->active &&
1093 (curr->cipher->strength_bits > max_strength_bits))
1094 max_strength_bits = curr->cipher->strength_bits;
1095 curr = curr->next;
1096 }
1097
1098 number_uses = calloc((max_strength_bits + 1), sizeof(int));
1099 if (!number_uses) {
1100 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
1101 return (0);
1102 }
1103
1104 /*
1105 * Now find the strength_bits values actually used
1106 */
1107 curr = *head_p;
1108 while (curr != NULL) {
1109 if (curr->active)
1110 number_uses[curr->cipher->strength_bits]++;
1111 curr = curr->next;
1112 }
1113 /*
1114 * Go through the list of used strength_bits values in descending
1115 * order.
1116 */
1117 for (i = max_strength_bits; i >= 0; i--)
1118 if (number_uses[i] > 0)
1119 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1120
1121 free(number_uses);
1122 return (1);
1123}
1124
1125static int
1126ssl_cipher_process_rulestr(const char *rule_str, CIPHER_ORDER **head_p,
1127 CIPHER_ORDER **tail_p, const SSL_CIPHER **ca_list)
1128{
1129 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
1130 unsigned long algo_strength;
1131 int j, multi, found, rule, retval, ok, buflen;
1132 unsigned long cipher_id = 0;
1133 const char *l, *buf;
1134 char ch;
1135
1136 retval = 1;
1137 l = rule_str;
1138 for (;;) {
1139 ch = *l;
1140
1141 if (ch == '\0')
1142 break;
1143
1144 if (ch == '-') {
1145 rule = CIPHER_DEL;
1146 l++;
1147 } else if (ch == '+') {
1148 rule = CIPHER_ORD;
1149 l++;
1150 } else if (ch == '!') {
1151 rule = CIPHER_KILL;
1152 l++;
1153 } else if (ch == '@') {
1154 rule = CIPHER_SPECIAL;
1155 l++;
1156 } else {
1157 rule = CIPHER_ADD;
1158 }
1159
1160 if (ITEM_SEP(ch)) {
1161 l++;
1162 continue;
1163 }
1164
1165 alg_mkey = 0;
1166 alg_auth = 0;
1167 alg_enc = 0;
1168 alg_mac = 0;
1169 alg_ssl = 0;
1170 algo_strength = 0;
1171
1172 for (;;) {
1173 ch = *l;
1174 buf = l;
1175 buflen = 0;
1176 while (((ch >= 'A') && (ch <= 'Z')) ||
1177 ((ch >= '0') && (ch <= '9')) ||
1178 ((ch >= 'a') && (ch <= 'z')) ||
1179 (ch == '-') || (ch == '.')) {
1180 ch = *(++l);
1181 buflen++;
1182 }
1183
1184 if (buflen == 0) {
1185 /*
1186 * We hit something we cannot deal with,
1187 * it is no command or separator nor
1188 * alphanumeric, so we call this an error.
1189 */
1190 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1191 SSL_R_INVALID_COMMAND);
1192 retval = found = 0;
1193 l++;
1194 break;
1195 }
1196
1197 if (rule == CIPHER_SPECIAL) {
1198 /* unused -- avoid compiler warning */
1199 found = 0;
1200 /* special treatment */
1201 break;
1202 }
1203
1204 /* check for multi-part specification */
1205 if (ch == '+') {
1206 multi = 1;
1207 l++;
1208 } else
1209 multi = 0;
1210
1211 /*
1212 * Now search for the cipher alias in the ca_list.
1213 * Be careful with the strncmp, because the "buflen"
1214 * limitation will make the rule "ADH:SOME" and the
1215 * cipher "ADH-MY-CIPHER" look like a match for
1216 * buflen=3. So additionally check whether the cipher
1217 * name found has the correct length. We can save a
1218 * strlen() call: just checking for the '\0' at the
1219 * right place is sufficient, we have to strncmp()
1220 * anyway (we cannot use strcmp(), because buf is not
1221 * '\0' terminated.)
1222 */
1223 j = found = 0;
1224 cipher_id = 0;
1225 while (ca_list[j]) {
1226 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1227 (ca_list[j]->name[buflen] == '\0')) {
1228 found = 1;
1229 break;
1230 } else
1231 j++;
1232 }
1233
1234 if (!found)
1235 break; /* ignore this entry */
1236
1237 if (ca_list[j]->algorithm_mkey) {
1238 if (alg_mkey) {
1239 alg_mkey &= ca_list[j]->algorithm_mkey;
1240 if (!alg_mkey) {
1241 found = 0;
1242 break;
1243 }
1244 } else
1245 alg_mkey = ca_list[j]->algorithm_mkey;
1246 }
1247
1248 if (ca_list[j]->algorithm_auth) {
1249 if (alg_auth) {
1250 alg_auth &= ca_list[j]->algorithm_auth;
1251 if (!alg_auth) {
1252 found = 0;
1253 break;
1254 }
1255 } else
1256 alg_auth = ca_list[j]->algorithm_auth;
1257 }
1258
1259 if (ca_list[j]->algorithm_enc) {
1260 if (alg_enc) {
1261 alg_enc &= ca_list[j]->algorithm_enc;
1262 if (!alg_enc) {
1263 found = 0;
1264 break;
1265 }
1266 } else
1267 alg_enc = ca_list[j]->algorithm_enc;
1268 }
1269
1270 if (ca_list[j]->algorithm_mac) {
1271 if (alg_mac) {
1272 alg_mac &= ca_list[j]->algorithm_mac;
1273 if (!alg_mac) {
1274 found = 0;
1275 break;
1276 }
1277 } else
1278 alg_mac = ca_list[j]->algorithm_mac;
1279 }
1280
1281 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1282 if (algo_strength & SSL_STRONG_MASK) {
1283 algo_strength &=
1284 (ca_list[j]->algo_strength &
1285 SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1286 if (!(algo_strength &
1287 SSL_STRONG_MASK)) {
1288 found = 0;
1289 break;
1290 }
1291 } else
1292 algo_strength |=
1293 ca_list[j]->algo_strength &
1294 SSL_STRONG_MASK;
1295 }
1296
1297 if (ca_list[j]->valid) {
1298 /*
1299 * explicit ciphersuite found; its protocol
1300 * version does not become part of the search
1301 * pattern!
1302 */
1303 cipher_id = ca_list[j]->id;
1304 } else {
1305 /*
1306 * not an explicit ciphersuite; only in this
1307 * case, the protocol version is considered
1308 * part of the search pattern
1309 */
1310 if (ca_list[j]->algorithm_ssl) {
1311 if (alg_ssl) {
1312 alg_ssl &=
1313 ca_list[j]->algorithm_ssl;
1314 if (!alg_ssl) {
1315 found = 0;
1316 break;
1317 }
1318 } else
1319 alg_ssl =
1320 ca_list[j]->algorithm_ssl;
1321 }
1322 }
1323
1324 if (!multi)
1325 break;
1326 }
1327
1328 /*
1329 * Ok, we have the rule, now apply it
1330 */
1331 if (rule == CIPHER_SPECIAL) {
1332 /* special command */
1333 ok = 0;
1334 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8))
1335 ok = ssl_cipher_strength_sort(head_p, tail_p);
1336 else
1337 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1338 SSL_R_INVALID_COMMAND);
1339 if (ok == 0)
1340 retval = 0;
1341 /*
1342 * We do not support any "multi" options
1343 * together with "@", so throw away the
1344 * rest of the command, if any left, until
1345 * end or ':' is found.
1346 */
1347 while ((*l != '\0') && !ITEM_SEP(*l))
1348 l++;
1349 } else if (found) {
1350 ssl_cipher_apply_rule(cipher_id, alg_mkey, alg_auth,
1351 alg_enc, alg_mac, alg_ssl, algo_strength, rule,
1352 -1, head_p, tail_p);
1353 } else {
1354 while ((*l != '\0') && !ITEM_SEP(*l))
1355 l++;
1356 }
1357 if (*l == '\0')
1358 break; /* done */
1359 }
1360
1361 return (retval);
1362}
1363
1364static inline int
1365ssl_aes_is_accelerated(void)
1366{
1367#if defined(__i386__) || defined(__x86_64__)
1368 return ((OPENSSL_cpu_caps() & (1ULL << 57)) != 0);
1369#else
1370 return (0);
1371#endif
1372}
1373
1374STACK_OF(SSL_CIPHER) *
1375ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1376 STACK_OF(SSL_CIPHER) **cipher_list,
1377 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1378 const char *rule_str)
1379{
1380 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1381 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1382 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1383 const char *rule_p;
1384 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1385 const SSL_CIPHER **ca_list = NULL;
1386
1387 /*
1388 * Return with error if nothing to do.
1389 */
1390 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1391 return NULL;
1392
1393 /*
1394 * To reduce the work to do we only want to process the compiled
1395 * in algorithms, so we first get the mask of disabled ciphers.
1396 */
1397 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1398
1399 /*
1400 * Now we have to collect the available ciphers from the compiled
1401 * in ciphers. We cannot get more than the number compiled in, so
1402 * it is used for allocation.
1403 */
1404 num_of_ciphers = ssl_method->num_ciphers();
1405 co_list = reallocarray(NULL, num_of_ciphers, sizeof(CIPHER_ORDER));
1406 if (co_list == NULL) {
1407 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1408 return(NULL); /* Failure */
1409 }
1410
1411 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1412 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1413 co_list, &head, &tail);
1414
1415
1416 /* Now arrange all ciphers by preference: */
1417
1418 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1419 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1420 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1421
1422 if (ssl_aes_is_accelerated() == 1) {
1423 /*
1424 * We have hardware assisted AES - prefer AES as a symmetric
1425 * cipher, with CHACHA20 second.
1426 */
1427 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
1428 CIPHER_ADD, -1, &head, &tail);
1429 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
1430 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1431 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305_OLD,
1432 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1433 } else {
1434 /*
1435 * CHACHA20 is fast and safe on all hardware and is thus our
1436 * preferred symmetric cipher, with AES second.
1437 */
1438 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
1439 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1440 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305_OLD,
1441 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1442 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
1443 CIPHER_ADD, -1, &head, &tail);
1444 }
1445
1446 /* Temporarily enable everything else for sorting */
1447 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1448
1449 /* Low priority for MD5 */
1450 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1451
1452 /* Move anonymous ciphers to the end. Usually, these will remain disabled.
1453 * (For applications that allow them, they aren't too bad, but we prefer
1454 * authenticated ciphers.) */
1455 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1456
1457 /* Move ciphers without forward secrecy to the end */
1458 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1459 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1460
1461 /* RC4 is sort of broken - move it to the end */
1462 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1463
1464 /* Now sort by symmetric encryption strength. The above ordering remains
1465 * in force within each class */
1466 if (!ssl_cipher_strength_sort(&head, &tail)) {
1467 free(co_list);
1468 return NULL;
1469 }
1470
1471 /* Now disable everything (maintaining the ordering!) */
1472 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1473
1474
1475 /*
1476 * We also need cipher aliases for selecting based on the rule_str.
1477 * There might be two types of entries in the rule_str: 1) names
1478 * of ciphers themselves 2) aliases for groups of ciphers.
1479 * For 1) we need the available ciphers and for 2) the cipher
1480 * groups of cipher_aliases added together in one list (otherwise
1481 * we would be happy with just the cipher_aliases table).
1482 */
1483 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1484 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1485 ca_list = reallocarray(NULL, num_of_alias_max, sizeof(SSL_CIPHER *));
1486 if (ca_list == NULL) {
1487 free(co_list);
1488 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1489 return(NULL); /* Failure */
1490 }
1491 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1492 disabled_mkey, disabled_auth, disabled_enc,
1493 disabled_mac, disabled_ssl, head);
1494
1495 /*
1496 * If the rule_string begins with DEFAULT, apply the default rule
1497 * before using the (possibly available) additional rules.
1498 */
1499 ok = 1;
1500 rule_p = rule_str;
1501 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1502 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1503 &head, &tail, ca_list);
1504 rule_p += 7;
1505 if (*rule_p == ':')
1506 rule_p++;
1507 }
1508
1509 if (ok && (strlen(rule_p) > 0))
1510 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1511
1512 free((void *)ca_list); /* Not needed anymore */
1513
1514 if (!ok) {
1515 /* Rule processing failure */
1516 free(co_list);
1517 return (NULL);
1518 }
1519
1520 /*
1521 * Allocate new "cipherstack" for the result, return with error
1522 * if we cannot get one.
1523 */
1524 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1525 free(co_list);
1526 return (NULL);
1527 }
1528
1529 /*
1530 * The cipher selection for the list is done. The ciphers are added
1531 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1532 */
1533 for (curr = head; curr != NULL; curr = curr->next) {
1534 if (curr->active) {
1535 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1536 }
1537 }
1538 free(co_list); /* Not needed any longer */
1539
1540 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1541 if (tmp_cipher_list == NULL) {
1542 sk_SSL_CIPHER_free(cipherstack);
1543 return NULL;
1544 }
1545 if (*cipher_list != NULL)
1546 sk_SSL_CIPHER_free(*cipher_list);
1547 *cipher_list = cipherstack;
1548 if (*cipher_list_by_id != NULL)
1549 sk_SSL_CIPHER_free(*cipher_list_by_id);
1550 *cipher_list_by_id = tmp_cipher_list;
1551 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,
1552 ssl_cipher_ptr_id_cmp);
1553
1554 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1555 return (cipherstack);
1556}
1557
1558const SSL_CIPHER *
1559SSL_CIPHER_get_by_id(unsigned int id)
1560{
1561 return ssl3_get_cipher_by_id(id);
1562}
1563
1564const SSL_CIPHER *
1565SSL_CIPHER_get_by_value(uint16_t value)
1566{
1567 return ssl3_get_cipher_by_value(value);
1568}
1569
1570char *
1571SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1572{
1573 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2;
1574 const char *ver, *kx, *au, *enc, *mac;
1575 char *ret;
1576 int l;
1577
1578 alg_mkey = cipher->algorithm_mkey;
1579 alg_auth = cipher->algorithm_auth;
1580 alg_enc = cipher->algorithm_enc;
1581 alg_mac = cipher->algorithm_mac;
1582 alg_ssl = cipher->algorithm_ssl;
1583
1584 alg2 = cipher->algorithm2;
1585
1586 if (alg_ssl & SSL_SSLV3)
1587 ver = "SSLv3";
1588 else if (alg_ssl & SSL_TLSV1_2)
1589 ver = "TLSv1.2";
1590 else
1591 ver = "unknown";
1592
1593 switch (alg_mkey) {
1594 case SSL_kRSA:
1595 kx = "RSA";
1596 break;
1597 case SSL_kDHE:
1598 kx = "DH";
1599 break;
1600 case SSL_kECDHr:
1601 kx = "ECDH/RSA";
1602 break;
1603 case SSL_kECDHe:
1604 kx = "ECDH/ECDSA";
1605 break;
1606 case SSL_kECDHE:
1607 kx = "ECDH";
1608 break;
1609 case SSL_kGOST:
1610 kx = "GOST";
1611 break;
1612 default:
1613 kx = "unknown";
1614 }
1615
1616 switch (alg_auth) {
1617 case SSL_aRSA:
1618 au = "RSA";
1619 break;
1620 case SSL_aDSS:
1621 au = "DSS";
1622 break;
1623 case SSL_aECDH:
1624 au = "ECDH";
1625 break;
1626 case SSL_aNULL:
1627 au = "None";
1628 break;
1629 case SSL_aECDSA:
1630 au = "ECDSA";
1631 break;
1632 case SSL_aGOST01:
1633 au = "GOST01";
1634 break;
1635 default:
1636 au = "unknown";
1637 break;
1638 }
1639
1640 switch (alg_enc) {
1641 case SSL_DES:
1642 enc = "DES(56)";
1643 break;
1644 case SSL_3DES:
1645 enc = "3DES(168)";
1646 break;
1647 case SSL_RC4:
1648 enc = alg2 & SSL2_CF_8_BYTE_ENC ? "RC4(64)" : "RC4(128)";
1649 break;
1650 case SSL_IDEA:
1651 enc = "IDEA(128)";
1652 break;
1653 case SSL_eNULL:
1654 enc = "None";
1655 break;
1656 case SSL_AES128:
1657 enc = "AES(128)";
1658 break;
1659 case SSL_AES256:
1660 enc = "AES(256)";
1661 break;
1662 case SSL_AES128GCM:
1663 enc = "AESGCM(128)";
1664 break;
1665 case SSL_AES256GCM:
1666 enc = "AESGCM(256)";
1667 break;
1668 case SSL_CAMELLIA128:
1669 enc = "Camellia(128)";
1670 break;
1671 case SSL_CAMELLIA256:
1672 enc = "Camellia(256)";
1673 break;
1674 case SSL_CHACHA20POLY1305:
1675 enc = "ChaCha20-Poly1305";
1676 break;
1677 case SSL_CHACHA20POLY1305_OLD:
1678 enc = "ChaCha20-Poly1305-Old";
1679 break;
1680 case SSL_eGOST2814789CNT:
1681 enc = "GOST-28178-89-CNT";
1682 break;
1683 default:
1684 enc = "unknown";
1685 break;
1686 }
1687
1688 switch (alg_mac) {
1689 case SSL_MD5:
1690 mac = "MD5";
1691 break;
1692 case SSL_SHA1:
1693 mac = "SHA1";
1694 break;
1695 case SSL_SHA256:
1696 mac = "SHA256";
1697 break;
1698 case SSL_SHA384:
1699 mac = "SHA384";
1700 break;
1701 case SSL_AEAD:
1702 mac = "AEAD";
1703 break;
1704 case SSL_GOST94:
1705 mac = "GOST94";
1706 break;
1707 case SSL_GOST89MAC:
1708 mac = "GOST89IMIT";
1709 break;
1710 case SSL_STREEBOG256:
1711 mac = "STREEBOG256";
1712 break;
1713 case SSL_STREEBOG512:
1714 mac = "STREEBOG512";
1715 break;
1716 default:
1717 mac = "unknown";
1718 break;
1719 }
1720
1721 if (asprintf(&ret, "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n",
1722 cipher->name, ver, kx, au, enc, mac) == -1)
1723 return "OPENSSL_malloc Error";
1724
1725 if (buf != NULL) {
1726 l = strlcpy(buf, ret, len);
1727 free(ret);
1728 ret = buf;
1729 if (l >= len)
1730 ret = "Buffer too small";
1731 }
1732
1733 return (ret);
1734}
1735
1736char *
1737SSL_CIPHER_get_version(const SSL_CIPHER *c)
1738{
1739 if (c == NULL)
1740 return("(NONE)");
1741 if ((c->id >> 24) == 3)
1742 return("TLSv1/SSLv3");
1743 else
1744 return("unknown");
1745}
1746
1747/* return the actual cipher being used */
1748const char *
1749SSL_CIPHER_get_name(const SSL_CIPHER *c)
1750{
1751 if (c != NULL)
1752 return (c->name);
1753 return("(NONE)");
1754}
1755
1756/* number of bits for symmetric cipher */
1757int
1758SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1759{
1760 int ret = 0;
1761
1762 if (c != NULL) {
1763 if (alg_bits != NULL)
1764 *alg_bits = c->alg_bits;
1765 ret = c->strength_bits;
1766 }
1767 return (ret);
1768}
1769
1770unsigned long
1771SSL_CIPHER_get_id(const SSL_CIPHER *c)
1772{
1773 return c->id;
1774}
1775
1776uint16_t
1777SSL_CIPHER_get_value(const SSL_CIPHER *c)
1778{
1779 return ssl3_cipher_get_value(c);
1780}
1781
1782void *
1783SSL_COMP_get_compression_methods(void)
1784{
1785 return NULL;
1786}
1787
1788int
1789SSL_COMP_add_compression_method(int id, void *cm)
1790{
1791 return 1;
1792}
1793
1794const char *
1795SSL_COMP_get_name(const void *comp)
1796{
1797 return NULL;
1798}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-05-09 10:03:24 +0000