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authorcvs2svn <admin@example.com>2022-05-04 18:02:08 +0000
committercvs2svn <admin@example.com>2022-05-04 18:02:08 +0000
commit3c94dc45dfb15483d76c47a128ec352cc0b655ac (patch)
treea7cfb4512c784e9518f1b1c2f4009295b8766ef4 /src/lib/libssl/ssl_ciph.c
parentf32cca700e59c0fd1ddd8f1fd4b35a5401be28fe (diff)
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This commit was manufactured by cvs2git to create tag 'tb_20220504'.tb_20220504
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diff --git a/src/lib/libssl/ssl_ciph.c b/src/lib/libssl/ssl_ciph.c
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1/* $OpenBSD: ssl_ciph.c,v 1.127 2022/03/05 07:13:48 bket 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#include <openssl/opensslconf.h>
147
148#ifndef OPENSSL_NO_ENGINE
149#include <openssl/engine.h>
150#endif
151
152#include "ssl_locl.h"
153
154#define CIPHER_ADD 1
155#define CIPHER_KILL 2
156#define CIPHER_DEL 3
157#define CIPHER_ORD 4
158#define CIPHER_SPECIAL 5
159
160typedef struct cipher_order_st {
161 const SSL_CIPHER *cipher;
162 int active;
163 int dead;
164 struct cipher_order_st *next, *prev;
165} CIPHER_ORDER;
166
167static const SSL_CIPHER cipher_aliases[] = {
168
169 /* "ALL" doesn't include eNULL (must be specifically enabled) */
170 {
171 .name = SSL_TXT_ALL,
172 .algorithm_enc = ~SSL_eNULL,
173 },
174
175 /* "COMPLEMENTOFALL" */
176 {
177 .name = SSL_TXT_CMPALL,
178 .algorithm_enc = SSL_eNULL,
179 },
180
181 /*
182 * "COMPLEMENTOFDEFAULT"
183 * (does *not* include ciphersuites not found in ALL!)
184 */
185 {
186 .name = SSL_TXT_CMPDEF,
187 .algorithm_mkey = SSL_kDHE|SSL_kECDHE,
188 .algorithm_auth = SSL_aNULL,
189 .algorithm_enc = ~SSL_eNULL,
190 },
191
192 /*
193 * key exchange aliases
194 * (some of those using only a single bit here combine multiple key
195 * exchange algs according to the RFCs, e.g. kEDH combines DHE_DSS
196 * and DHE_RSA)
197 */
198 {
199 .name = SSL_TXT_kRSA,
200 .algorithm_mkey = SSL_kRSA,
201 },
202 {
203 .name = SSL_TXT_kEDH,
204 .algorithm_mkey = SSL_kDHE,
205 },
206 {
207 .name = SSL_TXT_DH,
208 .algorithm_mkey = SSL_kDHE,
209 },
210 {
211 .name = SSL_TXT_kEECDH,
212 .algorithm_mkey = SSL_kECDHE,
213 },
214 {
215 .name = SSL_TXT_ECDH,
216 .algorithm_mkey = SSL_kECDHE,
217 },
218 {
219 .name = SSL_TXT_kGOST,
220 .algorithm_mkey = SSL_kGOST,
221 },
222
223 /* server authentication aliases */
224 {
225 .name = SSL_TXT_aRSA,
226 .algorithm_auth = SSL_aRSA,
227 },
228 {
229 .name = SSL_TXT_aDSS,
230 .algorithm_auth = SSL_aDSS,
231 },
232 {
233 .name = SSL_TXT_DSS,
234 .algorithm_auth = SSL_aDSS,
235 },
236 {
237 .name = SSL_TXT_aNULL,
238 .algorithm_auth = SSL_aNULL,
239 },
240 {
241 .name = SSL_TXT_aECDSA,
242 .algorithm_auth = SSL_aECDSA,
243 },
244 {
245 .name = SSL_TXT_ECDSA,
246 .algorithm_auth = SSL_aECDSA,
247 },
248 {
249 .name = SSL_TXT_aGOST01,
250 .algorithm_auth = SSL_aGOST01,
251 },
252 {
253 .name = SSL_TXT_aGOST,
254 .algorithm_auth = SSL_aGOST01,
255 },
256
257 /* aliases combining key exchange and server authentication */
258 {
259 .name = SSL_TXT_DHE,
260 .algorithm_mkey = SSL_kDHE,
261 .algorithm_auth = ~SSL_aNULL,
262 },
263 {
264 .name = SSL_TXT_EDH,
265 .algorithm_mkey = SSL_kDHE,
266 .algorithm_auth = ~SSL_aNULL,
267 },
268 {
269 .name = SSL_TXT_ECDHE,
270 .algorithm_mkey = SSL_kECDHE,
271 .algorithm_auth = ~SSL_aNULL,
272 },
273 {
274 .name = SSL_TXT_EECDH,
275 .algorithm_mkey = SSL_kECDHE,
276 .algorithm_auth = ~SSL_aNULL,
277 },
278 {
279 .name = SSL_TXT_NULL,
280 .algorithm_enc = SSL_eNULL,
281 },
282 {
283 .name = SSL_TXT_RSA,
284 .algorithm_mkey = SSL_kRSA,
285 .algorithm_auth = SSL_aRSA,
286 },
287 {
288 .name = SSL_TXT_ADH,
289 .algorithm_mkey = SSL_kDHE,
290 .algorithm_auth = SSL_aNULL,
291 },
292 {
293 .name = SSL_TXT_AECDH,
294 .algorithm_mkey = SSL_kECDHE,
295 .algorithm_auth = SSL_aNULL,
296 },
297
298 /* symmetric encryption aliases */
299 {
300 .name = SSL_TXT_3DES,
301 .algorithm_enc = SSL_3DES,
302 },
303 {
304 .name = SSL_TXT_RC4,
305 .algorithm_enc = SSL_RC4,
306 },
307 {
308 .name = SSL_TXT_eNULL,
309 .algorithm_enc = SSL_eNULL,
310 },
311 {
312 .name = SSL_TXT_AES128,
313 .algorithm_enc = SSL_AES128|SSL_AES128GCM,
314 },
315 {
316 .name = SSL_TXT_AES256,
317 .algorithm_enc = SSL_AES256|SSL_AES256GCM,
318 },
319 {
320 .name = SSL_TXT_AES,
321 .algorithm_enc = SSL_AES,
322 },
323 {
324 .name = SSL_TXT_AES_GCM,
325 .algorithm_enc = SSL_AES128GCM|SSL_AES256GCM,
326 },
327 {
328 .name = SSL_TXT_CAMELLIA128,
329 .algorithm_enc = SSL_CAMELLIA128,
330 },
331 {
332 .name = SSL_TXT_CAMELLIA256,
333 .algorithm_enc = SSL_CAMELLIA256,
334 },
335 {
336 .name = SSL_TXT_CAMELLIA,
337 .algorithm_enc = SSL_CAMELLIA128|SSL_CAMELLIA256,
338 },
339 {
340 .name = SSL_TXT_CHACHA20,
341 .algorithm_enc = SSL_CHACHA20POLY1305,
342 },
343
344 /* MAC aliases */
345 {
346 .name = SSL_TXT_AEAD,
347 .algorithm_mac = SSL_AEAD,
348 },
349 {
350 .name = SSL_TXT_MD5,
351 .algorithm_mac = SSL_MD5,
352 },
353 {
354 .name = SSL_TXT_SHA1,
355 .algorithm_mac = SSL_SHA1,
356 },
357 {
358 .name = SSL_TXT_SHA,
359 .algorithm_mac = SSL_SHA1,
360 },
361 {
362 .name = SSL_TXT_GOST94,
363 .algorithm_mac = SSL_GOST94,
364 },
365 {
366 .name = SSL_TXT_GOST89MAC,
367 .algorithm_mac = SSL_GOST89MAC,
368 },
369 {
370 .name = SSL_TXT_SHA256,
371 .algorithm_mac = SSL_SHA256,
372 },
373 {
374 .name = SSL_TXT_SHA384,
375 .algorithm_mac = SSL_SHA384,
376 },
377 {
378 .name = SSL_TXT_STREEBOG256,
379 .algorithm_mac = SSL_STREEBOG256,
380 },
381
382 /* protocol version aliases */
383 {
384 .name = SSL_TXT_SSLV3,
385 .algorithm_ssl = SSL_SSLV3,
386 },
387 {
388 .name = SSL_TXT_TLSV1,
389 .algorithm_ssl = SSL_TLSV1,
390 },
391 {
392 .name = SSL_TXT_TLSV1_2,
393 .algorithm_ssl = SSL_TLSV1_2,
394 },
395 {
396 .name = SSL_TXT_TLSV1_3,
397 .algorithm_ssl = SSL_TLSV1_3,
398 },
399
400 /* cipher suite aliases */
401#ifdef LIBRESSL_HAS_TLS1_3
402 {
403 .valid = 1,
404 .name = "TLS_AES_128_GCM_SHA256",
405 .id = TLS1_3_CK_AES_128_GCM_SHA256,
406 .algorithm_ssl = SSL_TLSV1_3,
407 },
408 {
409 .valid = 1,
410 .name = "TLS_AES_256_GCM_SHA384",
411 .id = TLS1_3_CK_AES_256_GCM_SHA384,
412 .algorithm_ssl = SSL_TLSV1_3,
413 },
414 {
415 .valid = 1,
416 .name = "TLS_CHACHA20_POLY1305_SHA256",
417 .id = TLS1_3_CK_CHACHA20_POLY1305_SHA256,
418 .algorithm_ssl = SSL_TLSV1_3,
419 },
420#endif
421
422 /* strength classes */
423 {
424 .name = SSL_TXT_LOW,
425 .algo_strength = SSL_LOW,
426 },
427 {
428 .name = SSL_TXT_MEDIUM,
429 .algo_strength = SSL_MEDIUM,
430 },
431 {
432 .name = SSL_TXT_HIGH,
433 .algo_strength = SSL_HIGH,
434 },
435};
436
437int
438ssl_cipher_get_evp(const SSL_SESSION *ss, const EVP_CIPHER **enc,
439 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
440{
441 *enc = NULL;
442 *md = NULL;
443 *mac_pkey_type = NID_undef;
444 *mac_secret_size = 0;
445
446 if (ss->cipher == NULL)
447 return 0;
448
449 /*
450 * This function does not handle EVP_AEAD.
451 * See ssl_cipher_get_evp_aead instead.
452 */
453 if (ss->cipher->algorithm_mac & SSL_AEAD)
454 return 0;
455
456 switch (ss->cipher->algorithm_enc) {
457 case SSL_3DES:
458 *enc = EVP_des_ede3_cbc();
459 break;
460 case SSL_RC4:
461 *enc = EVP_rc4();
462 break;
463 case SSL_eNULL:
464 *enc = EVP_enc_null();
465 break;
466 case SSL_AES128:
467 *enc = EVP_aes_128_cbc();
468 break;
469 case SSL_AES256:
470 *enc = EVP_aes_256_cbc();
471 break;
472 case SSL_CAMELLIA128:
473 *enc = EVP_camellia_128_cbc();
474 break;
475 case SSL_CAMELLIA256:
476 *enc = EVP_camellia_256_cbc();
477 break;
478 case SSL_eGOST2814789CNT:
479 *enc = EVP_gost2814789_cnt();
480 break;
481 }
482
483 switch (ss->cipher->algorithm_mac) {
484 case SSL_MD5:
485 *md = EVP_md5();
486 break;
487 case SSL_SHA1:
488 *md = EVP_sha1();
489 break;
490 case SSL_SHA256:
491 *md = EVP_sha256();
492 break;
493 case SSL_SHA384:
494 *md = EVP_sha384();
495 break;
496 case SSL_GOST89MAC:
497 *md = EVP_gost2814789imit();
498 break;
499 case SSL_GOST94:
500 *md = EVP_gostr341194();
501 break;
502 case SSL_STREEBOG256:
503 *md = EVP_streebog256();
504 break;
505 }
506
507 if (*enc == NULL || *md == NULL)
508 return 0;
509
510 /*
511 * EVP_CIPH_FLAG_AEAD_CIPHER and EVP_CIPH_GCM_MODE ciphers are not
512 * supported via EVP_CIPHER (they should be using EVP_AEAD instead).
513 */
514 if (EVP_CIPHER_flags(*enc) & EVP_CIPH_FLAG_AEAD_CIPHER)
515 return 0;
516 if (EVP_CIPHER_mode(*enc) == EVP_CIPH_GCM_MODE)
517 return 0;
518
519 if (ss->cipher->algorithm_mac == SSL_GOST89MAC) {
520 *mac_pkey_type = EVP_PKEY_GOSTIMIT;
521 *mac_secret_size = 32; /* XXX */
522 } else {
523 *mac_pkey_type = EVP_PKEY_HMAC;
524 *mac_secret_size = EVP_MD_size(*md);
525 }
526
527 return 1;
528}
529
530/*
531 * ssl_cipher_get_evp_aead sets aead to point to the correct EVP_AEAD object
532 * for s->cipher. It returns 1 on success and 0 on error.
533 */
534int
535ssl_cipher_get_evp_aead(const SSL_SESSION *ss, const EVP_AEAD **aead)
536{
537 *aead = NULL;
538
539 if (ss->cipher == NULL)
540 return 0;
541 if ((ss->cipher->algorithm_mac & SSL_AEAD) == 0)
542 return 0;
543
544 switch (ss->cipher->algorithm_enc) {
545 case SSL_AES128GCM:
546 *aead = EVP_aead_aes_128_gcm();
547 return 1;
548 case SSL_AES256GCM:
549 *aead = EVP_aead_aes_256_gcm();
550 return 1;
551 case SSL_CHACHA20POLY1305:
552 *aead = EVP_aead_chacha20_poly1305();
553 return 1;
554 default:
555 break;
556 }
557 return 0;
558}
559
560int
561ssl_get_handshake_evp_md(SSL *s, const EVP_MD **md)
562{
563 unsigned long handshake_mac;
564
565 *md = NULL;
566
567 if (s->s3->hs.cipher == NULL)
568 return 0;
569
570 handshake_mac = s->s3->hs.cipher->algorithm2 &
571 SSL_HANDSHAKE_MAC_MASK;
572
573 /* For TLSv1.2 we upgrade the default MD5+SHA1 MAC to SHA256. */
574 if (SSL_USE_SHA256_PRF(s) && handshake_mac == SSL_HANDSHAKE_MAC_DEFAULT)
575 handshake_mac = SSL_HANDSHAKE_MAC_SHA256;
576
577 switch (handshake_mac) {
578 case SSL_HANDSHAKE_MAC_DEFAULT:
579 *md = EVP_md5_sha1();
580 return 1;
581 case SSL_HANDSHAKE_MAC_GOST94:
582 *md = EVP_gostr341194();
583 return 1;
584 case SSL_HANDSHAKE_MAC_SHA256:
585 *md = EVP_sha256();
586 return 1;
587 case SSL_HANDSHAKE_MAC_SHA384:
588 *md = EVP_sha384();
589 return 1;
590 case SSL_HANDSHAKE_MAC_STREEBOG256:
591 *md = EVP_streebog256();
592 return 1;
593 default:
594 break;
595 }
596
597 return 0;
598}
599
600#define ITEM_SEP(a) \
601 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
602
603static void
604ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
605 CIPHER_ORDER **tail)
606{
607 if (curr == *tail)
608 return;
609 if (curr == *head)
610 *head = curr->next;
611 if (curr->prev != NULL)
612 curr->prev->next = curr->next;
613 if (curr->next != NULL)
614 curr->next->prev = curr->prev;
615 (*tail)->next = curr;
616 curr->prev= *tail;
617 curr->next = NULL;
618 *tail = curr;
619}
620
621static void
622ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
623 CIPHER_ORDER **tail)
624{
625 if (curr == *head)
626 return;
627 if (curr == *tail)
628 *tail = curr->prev;
629 if (curr->next != NULL)
630 curr->next->prev = curr->prev;
631 if (curr->prev != NULL)
632 curr->prev->next = curr->next;
633 (*head)->prev = curr;
634 curr->next= *head;
635 curr->prev = NULL;
636 *head = curr;
637}
638
639static void
640ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth,
641 unsigned long *enc, unsigned long *mac, unsigned long *ssl)
642{
643 *mkey = 0;
644 *auth = 0;
645 *enc = 0;
646 *mac = 0;
647 *ssl = 0;
648
649 /*
650 * Check for the availability of GOST 34.10 public/private key
651 * algorithms. If they are not available disable the associated
652 * authentication and key exchange algorithms.
653 */
654 if (EVP_PKEY_meth_find(NID_id_GostR3410_2001) == NULL) {
655 *auth |= SSL_aGOST01;
656 *mkey |= SSL_kGOST;
657 }
658
659#ifdef SSL_FORBID_ENULL
660 *enc |= SSL_eNULL;
661#endif
662}
663
664static void
665ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, int num_of_ciphers,
666 unsigned long disabled_mkey, unsigned long disabled_auth,
667 unsigned long disabled_enc, unsigned long disabled_mac,
668 unsigned long disabled_ssl, CIPHER_ORDER *co_list,
669 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
670{
671 int i, co_list_num;
672 const SSL_CIPHER *c;
673
674 /*
675 * We have num_of_ciphers descriptions compiled in, depending on the
676 * method selected (SSLv3, TLSv1, etc). These will later be sorted in
677 * a linked list with at most num entries.
678 */
679
680 /* Get the initial list of ciphers */
681 co_list_num = 0; /* actual count of ciphers */
682 for (i = 0; i < num_of_ciphers; i++) {
683 c = ssl_method->get_cipher(i);
684 /*
685 * Drop any invalid ciphers and any which use unavailable
686 * algorithms.
687 */
688 if ((c != NULL) && c->valid &&
689 !(c->algorithm_mkey & disabled_mkey) &&
690 !(c->algorithm_auth & disabled_auth) &&
691 !(c->algorithm_enc & disabled_enc) &&
692 !(c->algorithm_mac & disabled_mac) &&
693 !(c->algorithm_ssl & disabled_ssl)) {
694 co_list[co_list_num].cipher = c;
695 co_list[co_list_num].next = NULL;
696 co_list[co_list_num].prev = NULL;
697 co_list[co_list_num].active = 0;
698 co_list_num++;
699 /*
700 if (!sk_push(ca_list,(char *)c)) goto err;
701 */
702 }
703 }
704
705 /*
706 * Prepare linked list from list entries
707 */
708 if (co_list_num > 0) {
709 co_list[0].prev = NULL;
710
711 if (co_list_num > 1) {
712 co_list[0].next = &co_list[1];
713
714 for (i = 1; i < co_list_num - 1; i++) {
715 co_list[i].prev = &co_list[i - 1];
716 co_list[i].next = &co_list[i + 1];
717 }
718
719 co_list[co_list_num - 1].prev =
720 &co_list[co_list_num - 2];
721 }
722
723 co_list[co_list_num - 1].next = NULL;
724
725 *head_p = &co_list[0];
726 *tail_p = &co_list[co_list_num - 1];
727 }
728}
729
730static void
731ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list, int num_of_group_aliases,
732 unsigned long disabled_mkey, unsigned long disabled_auth,
733 unsigned long disabled_enc, unsigned long disabled_mac,
734 unsigned long disabled_ssl, CIPHER_ORDER *head)
735{
736 CIPHER_ORDER *ciph_curr;
737 const SSL_CIPHER **ca_curr;
738 int i;
739 unsigned long mask_mkey = ~disabled_mkey;
740 unsigned long mask_auth = ~disabled_auth;
741 unsigned long mask_enc = ~disabled_enc;
742 unsigned long mask_mac = ~disabled_mac;
743 unsigned long mask_ssl = ~disabled_ssl;
744
745 /*
746 * First, add the real ciphers as already collected
747 */
748 ciph_curr = head;
749 ca_curr = ca_list;
750 while (ciph_curr != NULL) {
751 *ca_curr = ciph_curr->cipher;
752 ca_curr++;
753 ciph_curr = ciph_curr->next;
754 }
755
756 /*
757 * Now we add the available ones from the cipher_aliases[] table.
758 * They represent either one or more algorithms, some of which
759 * in any affected category must be supported (set in enabled_mask),
760 * or represent a cipher strength value (will be added in any case because algorithms=0).
761 */
762 for (i = 0; i < num_of_group_aliases; i++) {
763 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
764 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
765 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
766 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
767 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
768
769 if (algorithm_mkey)
770 if ((algorithm_mkey & mask_mkey) == 0)
771 continue;
772
773 if (algorithm_auth)
774 if ((algorithm_auth & mask_auth) == 0)
775 continue;
776
777 if (algorithm_enc)
778 if ((algorithm_enc & mask_enc) == 0)
779 continue;
780
781 if (algorithm_mac)
782 if ((algorithm_mac & mask_mac) == 0)
783 continue;
784
785 if (algorithm_ssl)
786 if ((algorithm_ssl & mask_ssl) == 0)
787 continue;
788
789 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
790 ca_curr++;
791 }
792
793 *ca_curr = NULL; /* end of list */
794}
795
796static void
797ssl_cipher_apply_rule(unsigned long cipher_id, unsigned long alg_mkey,
798 unsigned long alg_auth, unsigned long alg_enc, unsigned long alg_mac,
799 unsigned long alg_ssl, unsigned long algo_strength, int rule,
800 int strength_bits, CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
801{
802 CIPHER_ORDER *head, *tail, *curr, *next, *last;
803 const SSL_CIPHER *cp;
804 int reverse = 0;
805
806 if (rule == CIPHER_DEL)
807 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
808
809 head = *head_p;
810 tail = *tail_p;
811
812 if (reverse) {
813 next = tail;
814 last = head;
815 } else {
816 next = head;
817 last = tail;
818 }
819
820 curr = NULL;
821 for (;;) {
822 if (curr == last)
823 break;
824 curr = next;
825 next = reverse ? curr->prev : curr->next;
826
827 cp = curr->cipher;
828
829 if (cipher_id && cp->id != cipher_id)
830 continue;
831
832 /*
833 * Selection criteria is either the value of strength_bits
834 * or the algorithms used.
835 */
836 if (strength_bits >= 0) {
837 if (strength_bits != cp->strength_bits)
838 continue;
839 } else {
840 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
841 continue;
842 if (alg_auth && !(alg_auth & cp->algorithm_auth))
843 continue;
844 if (alg_enc && !(alg_enc & cp->algorithm_enc))
845 continue;
846 if (alg_mac && !(alg_mac & cp->algorithm_mac))
847 continue;
848 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
849 continue;
850 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
851 continue;
852 }
853
854 /* add the cipher if it has not been added yet. */
855 if (rule == CIPHER_ADD) {
856 /* reverse == 0 */
857 if (!curr->active) {
858 ll_append_tail(&head, curr, &tail);
859 curr->active = 1;
860 }
861 }
862 /* Move the added cipher to this location */
863 else if (rule == CIPHER_ORD) {
864 /* reverse == 0 */
865 if (curr->active) {
866 ll_append_tail(&head, curr, &tail);
867 }
868 } else if (rule == CIPHER_DEL) {
869 /* reverse == 1 */
870 if (curr->active) {
871 /* most recently deleted ciphersuites get best positions
872 * for any future CIPHER_ADD (note that the CIPHER_DEL loop
873 * works in reverse to maintain the order) */
874 ll_append_head(&head, curr, &tail);
875 curr->active = 0;
876 }
877 } else if (rule == CIPHER_KILL) {
878 /* reverse == 0 */
879 if (head == curr)
880 head = curr->next;
881 else
882 curr->prev->next = curr->next;
883 if (tail == curr)
884 tail = curr->prev;
885 curr->active = 0;
886 if (curr->next != NULL)
887 curr->next->prev = curr->prev;
888 if (curr->prev != NULL)
889 curr->prev->next = curr->next;
890 curr->next = NULL;
891 curr->prev = NULL;
892 }
893 }
894
895 *head_p = head;
896 *tail_p = tail;
897}
898
899static int
900ssl_cipher_strength_sort(CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
901{
902 int max_strength_bits, i, *number_uses;
903 CIPHER_ORDER *curr;
904
905 /*
906 * This routine sorts the ciphers with descending strength. The sorting
907 * must keep the pre-sorted sequence, so we apply the normal sorting
908 * routine as '+' movement to the end of the list.
909 */
910 max_strength_bits = 0;
911 curr = *head_p;
912 while (curr != NULL) {
913 if (curr->active &&
914 (curr->cipher->strength_bits > max_strength_bits))
915 max_strength_bits = curr->cipher->strength_bits;
916 curr = curr->next;
917 }
918
919 number_uses = calloc((max_strength_bits + 1), sizeof(int));
920 if (!number_uses) {
921 SSLerrorx(ERR_R_MALLOC_FAILURE);
922 return (0);
923 }
924
925 /*
926 * Now find the strength_bits values actually used
927 */
928 curr = *head_p;
929 while (curr != NULL) {
930 if (curr->active)
931 number_uses[curr->cipher->strength_bits]++;
932 curr = curr->next;
933 }
934 /*
935 * Go through the list of used strength_bits values in descending
936 * order.
937 */
938 for (i = max_strength_bits; i >= 0; i--)
939 if (number_uses[i] > 0)
940 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
941
942 free(number_uses);
943 return (1);
944}
945
946static int
947ssl_cipher_process_rulestr(const char *rule_str, CIPHER_ORDER **head_p,
948 CIPHER_ORDER **tail_p, const SSL_CIPHER **ca_list, int *tls13_seen)
949{
950 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl;
951 unsigned long algo_strength;
952 int j, multi, found, rule, retval, ok, buflen;
953 unsigned long cipher_id = 0;
954 const char *l, *buf;
955 char ch;
956
957 *tls13_seen = 0;
958
959 retval = 1;
960 l = rule_str;
961 for (;;) {
962 ch = *l;
963
964 if (ch == '\0')
965 break;
966
967 if (ch == '-') {
968 rule = CIPHER_DEL;
969 l++;
970 } else if (ch == '+') {
971 rule = CIPHER_ORD;
972 l++;
973 } else if (ch == '!') {
974 rule = CIPHER_KILL;
975 l++;
976 } else if (ch == '@') {
977 rule = CIPHER_SPECIAL;
978 l++;
979 } else {
980 rule = CIPHER_ADD;
981 }
982
983 if (ITEM_SEP(ch)) {
984 l++;
985 continue;
986 }
987
988 alg_mkey = 0;
989 alg_auth = 0;
990 alg_enc = 0;
991 alg_mac = 0;
992 alg_ssl = 0;
993 algo_strength = 0;
994
995 for (;;) {
996 ch = *l;
997 buf = l;
998 buflen = 0;
999 while (((ch >= 'A') && (ch <= 'Z')) ||
1000 ((ch >= '0') && (ch <= '9')) ||
1001 ((ch >= 'a') && (ch <= 'z')) ||
1002 (ch == '-') || (ch == '.') ||
1003 (ch == '_')) {
1004 ch = *(++l);
1005 buflen++;
1006 }
1007
1008 if (buflen == 0) {
1009 /*
1010 * We hit something we cannot deal with,
1011 * it is no command or separator nor
1012 * alphanumeric, so we call this an error.
1013 */
1014 SSLerrorx(SSL_R_INVALID_COMMAND);
1015 retval = found = 0;
1016 l++;
1017 break;
1018 }
1019
1020 if (rule == CIPHER_SPECIAL) {
1021 /* unused -- avoid compiler warning */
1022 found = 0;
1023 /* special treatment */
1024 break;
1025 }
1026
1027 /* check for multi-part specification */
1028 if (ch == '+') {
1029 multi = 1;
1030 l++;
1031 } else
1032 multi = 0;
1033
1034 /*
1035 * Now search for the cipher alias in the ca_list.
1036 * Be careful with the strncmp, because the "buflen"
1037 * limitation will make the rule "ADH:SOME" and the
1038 * cipher "ADH-MY-CIPHER" look like a match for
1039 * buflen=3. So additionally check whether the cipher
1040 * name found has the correct length. We can save a
1041 * strlen() call: just checking for the '\0' at the
1042 * right place is sufficient, we have to strncmp()
1043 * anyway (we cannot use strcmp(), because buf is not
1044 * '\0' terminated.)
1045 */
1046 j = found = 0;
1047 cipher_id = 0;
1048 while (ca_list[j]) {
1049 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1050 (ca_list[j]->name[buflen] == '\0')) {
1051 found = 1;
1052 break;
1053 } else
1054 j++;
1055 }
1056
1057 if (!found)
1058 break; /* ignore this entry */
1059
1060 if (ca_list[j]->algorithm_mkey) {
1061 if (alg_mkey) {
1062 alg_mkey &= ca_list[j]->algorithm_mkey;
1063 if (!alg_mkey) {
1064 found = 0;
1065 break;
1066 }
1067 } else
1068 alg_mkey = ca_list[j]->algorithm_mkey;
1069 }
1070
1071 if (ca_list[j]->algorithm_auth) {
1072 if (alg_auth) {
1073 alg_auth &= ca_list[j]->algorithm_auth;
1074 if (!alg_auth) {
1075 found = 0;
1076 break;
1077 }
1078 } else
1079 alg_auth = ca_list[j]->algorithm_auth;
1080 }
1081
1082 if (ca_list[j]->algorithm_enc) {
1083 if (alg_enc) {
1084 alg_enc &= ca_list[j]->algorithm_enc;
1085 if (!alg_enc) {
1086 found = 0;
1087 break;
1088 }
1089 } else
1090 alg_enc = ca_list[j]->algorithm_enc;
1091 }
1092
1093 if (ca_list[j]->algorithm_mac) {
1094 if (alg_mac) {
1095 alg_mac &= ca_list[j]->algorithm_mac;
1096 if (!alg_mac) {
1097 found = 0;
1098 break;
1099 }
1100 } else
1101 alg_mac = ca_list[j]->algorithm_mac;
1102 }
1103
1104 if (ca_list[j]->algo_strength & SSL_STRONG_MASK) {
1105 if (algo_strength & SSL_STRONG_MASK) {
1106 algo_strength &=
1107 (ca_list[j]->algo_strength &
1108 SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1109 if (!(algo_strength &
1110 SSL_STRONG_MASK)) {
1111 found = 0;
1112 break;
1113 }
1114 } else
1115 algo_strength |=
1116 ca_list[j]->algo_strength &
1117 SSL_STRONG_MASK;
1118 }
1119
1120 if (ca_list[j]->valid) {
1121 /*
1122 * explicit ciphersuite found; its protocol
1123 * version does not become part of the search
1124 * pattern!
1125 */
1126 cipher_id = ca_list[j]->id;
1127 if (ca_list[j]->algorithm_ssl == SSL_TLSV1_3)
1128 *tls13_seen = 1;
1129 } else {
1130 /*
1131 * not an explicit ciphersuite; only in this
1132 * case, the protocol version is considered
1133 * part of the search pattern
1134 */
1135 if (ca_list[j]->algorithm_ssl) {
1136 if (alg_ssl) {
1137 alg_ssl &=
1138 ca_list[j]->algorithm_ssl;
1139 if (!alg_ssl) {
1140 found = 0;
1141 break;
1142 }
1143 } else
1144 alg_ssl =
1145 ca_list[j]->algorithm_ssl;
1146 }
1147 }
1148
1149 if (!multi)
1150 break;
1151 }
1152
1153 /*
1154 * Ok, we have the rule, now apply it
1155 */
1156 if (rule == CIPHER_SPECIAL) {
1157 /* special command */
1158 ok = 0;
1159 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8))
1160 ok = ssl_cipher_strength_sort(head_p, tail_p);
1161 else
1162 SSLerrorx(SSL_R_INVALID_COMMAND);
1163 if (ok == 0)
1164 retval = 0;
1165 /*
1166 * We do not support any "multi" options
1167 * together with "@", so throw away the
1168 * rest of the command, if any left, until
1169 * end or ':' is found.
1170 */
1171 while ((*l != '\0') && !ITEM_SEP(*l))
1172 l++;
1173 } else if (found) {
1174 if (alg_ssl == SSL_TLSV1_3)
1175 *tls13_seen = 1;
1176 ssl_cipher_apply_rule(cipher_id, alg_mkey, alg_auth,
1177 alg_enc, alg_mac, alg_ssl, algo_strength, rule,
1178 -1, head_p, tail_p);
1179 } else {
1180 while ((*l != '\0') && !ITEM_SEP(*l))
1181 l++;
1182 }
1183 if (*l == '\0')
1184 break; /* done */
1185 }
1186
1187 return (retval);
1188}
1189
1190static inline int
1191ssl_aes_is_accelerated(void)
1192{
1193#if defined(__i386__) || defined(__x86_64__)
1194 return ((OPENSSL_cpu_caps() & (1ULL << 57)) != 0);
1195#else
1196 return (0);
1197#endif
1198}
1199
1200STACK_OF(SSL_CIPHER) *
1201ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1202 STACK_OF(SSL_CIPHER) **cipher_list,
1203 STACK_OF(SSL_CIPHER) *cipher_list_tls13,
1204 const char *rule_str)
1205{
1206 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1207 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1208 STACK_OF(SSL_CIPHER) *cipherstack;
1209 const char *rule_p;
1210 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1211 const SSL_CIPHER **ca_list = NULL;
1212 const SSL_CIPHER *cipher;
1213 int tls13_seen = 0;
1214 int any_active;
1215 int i;
1216
1217 /*
1218 * Return with error if nothing to do.
1219 */
1220 if (rule_str == NULL || cipher_list == NULL)
1221 return NULL;
1222
1223 /*
1224 * To reduce the work to do we only want to process the compiled
1225 * in algorithms, so we first get the mask of disabled ciphers.
1226 */
1227 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1228
1229 /*
1230 * Now we have to collect the available ciphers from the compiled
1231 * in ciphers. We cannot get more than the number compiled in, so
1232 * it is used for allocation.
1233 */
1234 num_of_ciphers = ssl3_num_ciphers();
1235 co_list = reallocarray(NULL, num_of_ciphers, sizeof(CIPHER_ORDER));
1236 if (co_list == NULL) {
1237 SSLerrorx(ERR_R_MALLOC_FAILURE);
1238 return(NULL); /* Failure */
1239 }
1240
1241 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1242 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1243 co_list, &head, &tail);
1244
1245
1246 /* Now arrange all ciphers by preference: */
1247
1248 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1249 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1250 ssl_cipher_apply_rule(0, SSL_kECDHE, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1251
1252 if (ssl_aes_is_accelerated()) {
1253 /*
1254 * We have hardware assisted AES - prefer AES as a symmetric
1255 * cipher, with CHACHA20 second.
1256 */
1257 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
1258 CIPHER_ADD, -1, &head, &tail);
1259 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
1260 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1261 } else {
1262 /*
1263 * CHACHA20 is fast and safe on all hardware and is thus our
1264 * preferred symmetric cipher, with AES second.
1265 */
1266 ssl_cipher_apply_rule(0, 0, 0, SSL_CHACHA20POLY1305,
1267 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1268 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0,
1269 CIPHER_ADD, -1, &head, &tail);
1270 }
1271
1272 /* Temporarily enable everything else for sorting */
1273 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1274
1275 /* Low priority for MD5 */
1276 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1277
1278 /* Move anonymous ciphers to the end. Usually, these will remain disabled.
1279 * (For applications that allow them, they aren't too bad, but we prefer
1280 * authenticated ciphers.) */
1281 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1282
1283 /* Move ciphers without forward secrecy to the end */
1284 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1285
1286 /* RC4 is sort of broken - move it to the end */
1287 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1288
1289 /* Now sort by symmetric encryption strength. The above ordering remains
1290 * in force within each class */
1291 if (!ssl_cipher_strength_sort(&head, &tail)) {
1292 free(co_list);
1293 return NULL;
1294 }
1295
1296 /* Now disable everything (maintaining the ordering!) */
1297 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1298
1299 /* TLSv1.3 first. */
1300 ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 0, CIPHER_ADD, -1, &head, &tail);
1301 ssl_cipher_apply_rule(0, 0, 0, 0, 0, SSL_TLSV1_3, 0, CIPHER_DEL, -1, &head, &tail);
1302
1303 /*
1304 * We also need cipher aliases for selecting based on the rule_str.
1305 * There might be two types of entries in the rule_str: 1) names
1306 * of ciphers themselves 2) aliases for groups of ciphers.
1307 * For 1) we need the available ciphers and for 2) the cipher
1308 * groups of cipher_aliases added together in one list (otherwise
1309 * we would be happy with just the cipher_aliases table).
1310 */
1311 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1312 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1313 ca_list = reallocarray(NULL, num_of_alias_max, sizeof(SSL_CIPHER *));
1314 if (ca_list == NULL) {
1315 free(co_list);
1316 SSLerrorx(ERR_R_MALLOC_FAILURE);
1317 return(NULL); /* Failure */
1318 }
1319 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mkey,
1320 disabled_auth, disabled_enc, disabled_mac, disabled_ssl, head);
1321
1322 /*
1323 * If the rule_string begins with DEFAULT, apply the default rule
1324 * before using the (possibly available) additional rules.
1325 */
1326 ok = 1;
1327 rule_p = rule_str;
1328 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1329 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1330 &head, &tail, ca_list, &tls13_seen);
1331 rule_p += 7;
1332 if (*rule_p == ':')
1333 rule_p++;
1334 }
1335
1336 if (ok && (strlen(rule_p) > 0))
1337 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list,
1338 &tls13_seen);
1339
1340 free((void *)ca_list); /* Not needed anymore */
1341
1342 if (!ok) {
1343 /* Rule processing failure */
1344 free(co_list);
1345 return (NULL);
1346 }
1347
1348 /*
1349 * Allocate new "cipherstack" for the result, return with error
1350 * if we cannot get one.
1351 */
1352 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1353 free(co_list);
1354 return (NULL);
1355 }
1356
1357 /* Prefer TLSv1.3 cipher suites. */
1358 if (cipher_list_tls13 != NULL) {
1359 for (i = 0; i < sk_SSL_CIPHER_num(cipher_list_tls13); i++) {
1360 cipher = sk_SSL_CIPHER_value(cipher_list_tls13, i);
1361 sk_SSL_CIPHER_push(cipherstack, cipher);
1362 }
1363 tls13_seen = 1;
1364 }
1365
1366 /*
1367 * The cipher selection for the list is done. The ciphers are added
1368 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1369 *
1370 * If the rule string did not contain any references to TLSv1.3 and
1371 * TLSv1.3 cipher suites have not been configured separately,
1372 * include inactive TLSv1.3 cipher suites. This avoids attempts to
1373 * use TLSv1.3 with an older rule string that does not include
1374 * TLSv1.3 cipher suites. If the rule string resulted in no active
1375 * cipher suites then we return an empty stack.
1376 */
1377 any_active = 0;
1378 for (curr = head; curr != NULL; curr = curr->next) {
1379 if (curr->active ||
1380 (!tls13_seen && curr->cipher->algorithm_ssl == SSL_TLSV1_3))
1381 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1382 any_active |= curr->active;
1383 }
1384 if (!any_active)
1385 sk_SSL_CIPHER_zero(cipherstack);
1386
1387 free(co_list); /* Not needed any longer */
1388
1389 sk_SSL_CIPHER_free(*cipher_list);
1390 *cipher_list = cipherstack;
1391
1392 return (cipherstack);
1393}
1394
1395const SSL_CIPHER *
1396SSL_CIPHER_get_by_id(unsigned int id)
1397{
1398 return ssl3_get_cipher_by_id(id);
1399}
1400
1401const SSL_CIPHER *
1402SSL_CIPHER_get_by_value(uint16_t value)
1403{
1404 return ssl3_get_cipher_by_value(value);
1405}
1406
1407char *
1408SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1409{
1410 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, alg2;
1411 const char *ver, *kx, *au, *enc, *mac;
1412 char *ret;
1413 int l;
1414
1415 alg_mkey = cipher->algorithm_mkey;
1416 alg_auth = cipher->algorithm_auth;
1417 alg_enc = cipher->algorithm_enc;
1418 alg_mac = cipher->algorithm_mac;
1419 alg_ssl = cipher->algorithm_ssl;
1420
1421 alg2 = cipher->algorithm2;
1422
1423 if (alg_ssl & SSL_SSLV3)
1424 ver = "SSLv3";
1425 else if (alg_ssl & SSL_TLSV1_2)
1426 ver = "TLSv1.2";
1427 else if (alg_ssl & SSL_TLSV1_3)
1428 ver = "TLSv1.3";
1429 else
1430 ver = "unknown";
1431
1432 switch (alg_mkey) {
1433 case SSL_kRSA:
1434 kx = "RSA";
1435 break;
1436 case SSL_kDHE:
1437 kx = "DH";
1438 break;
1439 case SSL_kECDHE:
1440 kx = "ECDH";
1441 break;
1442 case SSL_kGOST:
1443 kx = "GOST";
1444 break;
1445 case SSL_kTLS1_3:
1446 kx = "TLSv1.3";
1447 break;
1448 default:
1449 kx = "unknown";
1450 }
1451
1452 switch (alg_auth) {
1453 case SSL_aRSA:
1454 au = "RSA";
1455 break;
1456 case SSL_aDSS:
1457 au = "DSS";
1458 break;
1459 case SSL_aNULL:
1460 au = "None";
1461 break;
1462 case SSL_aECDSA:
1463 au = "ECDSA";
1464 break;
1465 case SSL_aGOST01:
1466 au = "GOST01";
1467 break;
1468 case SSL_aTLS1_3:
1469 au = "TLSv1.3";
1470 break;
1471 default:
1472 au = "unknown";
1473 break;
1474 }
1475
1476 switch (alg_enc) {
1477 case SSL_3DES:
1478 enc = "3DES(168)";
1479 break;
1480 case SSL_RC4:
1481 enc = alg2 & SSL2_CF_8_BYTE_ENC ? "RC4(64)" : "RC4(128)";
1482 break;
1483 case SSL_eNULL:
1484 enc = "None";
1485 break;
1486 case SSL_AES128:
1487 enc = "AES(128)";
1488 break;
1489 case SSL_AES256:
1490 enc = "AES(256)";
1491 break;
1492 case SSL_AES128GCM:
1493 enc = "AESGCM(128)";
1494 break;
1495 case SSL_AES256GCM:
1496 enc = "AESGCM(256)";
1497 break;
1498 case SSL_CAMELLIA128:
1499 enc = "Camellia(128)";
1500 break;
1501 case SSL_CAMELLIA256:
1502 enc = "Camellia(256)";
1503 break;
1504 case SSL_CHACHA20POLY1305:
1505 enc = "ChaCha20-Poly1305";
1506 break;
1507 case SSL_eGOST2814789CNT:
1508 enc = "GOST-28178-89-CNT";
1509 break;
1510 default:
1511 enc = "unknown";
1512 break;
1513 }
1514
1515 switch (alg_mac) {
1516 case SSL_MD5:
1517 mac = "MD5";
1518 break;
1519 case SSL_SHA1:
1520 mac = "SHA1";
1521 break;
1522 case SSL_SHA256:
1523 mac = "SHA256";
1524 break;
1525 case SSL_SHA384:
1526 mac = "SHA384";
1527 break;
1528 case SSL_AEAD:
1529 mac = "AEAD";
1530 break;
1531 case SSL_GOST94:
1532 mac = "GOST94";
1533 break;
1534 case SSL_GOST89MAC:
1535 mac = "GOST89IMIT";
1536 break;
1537 case SSL_STREEBOG256:
1538 mac = "STREEBOG256";
1539 break;
1540 default:
1541 mac = "unknown";
1542 break;
1543 }
1544
1545 if (asprintf(&ret, "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s\n",
1546 cipher->name, ver, kx, au, enc, mac) == -1)
1547 return "OPENSSL_malloc Error";
1548
1549 if (buf != NULL) {
1550 l = strlcpy(buf, ret, len);
1551 free(ret);
1552 ret = buf;
1553 if (l >= len)
1554 ret = "Buffer too small";
1555 }
1556
1557 return (ret);
1558}
1559
1560const char *
1561SSL_CIPHER_get_version(const SSL_CIPHER *c)
1562{
1563 if (c == NULL)
1564 return("(NONE)");
1565 if ((c->id >> 24) == 3)
1566 return("TLSv1/SSLv3");
1567 else
1568 return("unknown");
1569}
1570
1571/* return the actual cipher being used */
1572const char *
1573SSL_CIPHER_get_name(const SSL_CIPHER *c)
1574{
1575 if (c != NULL)
1576 return (c->name);
1577 return("(NONE)");
1578}
1579
1580/* number of bits for symmetric cipher */
1581int
1582SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1583{
1584 int ret = 0;
1585
1586 if (c != NULL) {
1587 if (alg_bits != NULL)
1588 *alg_bits = c->alg_bits;
1589 ret = c->strength_bits;
1590 }
1591 return (ret);
1592}
1593
1594unsigned long
1595SSL_CIPHER_get_id(const SSL_CIPHER *c)
1596{
1597 return c->id;
1598}
1599
1600uint16_t
1601SSL_CIPHER_get_value(const SSL_CIPHER *c)
1602{
1603 return ssl3_cipher_get_value(c);
1604}
1605
1606const SSL_CIPHER *
1607SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
1608{
1609 uint16_t cipher_value;
1610 CBS cbs;
1611
1612 /* This API is documented with ptr being an array of length two. */
1613 CBS_init(&cbs, ptr, 2);
1614 if (!CBS_get_u16(&cbs, &cipher_value))
1615 return NULL;
1616
1617 return ssl3_get_cipher_by_value(cipher_value);
1618}
1619
1620int
1621SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c)
1622{
1623 switch (c->algorithm_enc) {
1624 case SSL_eNULL:
1625 return NID_undef;
1626 case SSL_3DES:
1627 return NID_des_ede3_cbc;
1628 case SSL_AES128:
1629 return NID_aes_128_cbc;
1630 case SSL_AES128GCM:
1631 return NID_aes_128_gcm;
1632 case SSL_AES256:
1633 return NID_aes_256_cbc;
1634 case SSL_AES256GCM:
1635 return NID_aes_256_gcm;
1636 case SSL_CAMELLIA128:
1637 return NID_camellia_128_cbc;
1638 case SSL_CAMELLIA256:
1639 return NID_camellia_256_cbc;
1640 case SSL_CHACHA20POLY1305:
1641 return NID_chacha20_poly1305;
1642 case SSL_DES:
1643 return NID_des_cbc;
1644 case SSL_RC4:
1645 return NID_rc4;
1646 case SSL_eGOST2814789CNT:
1647 return NID_gost89_cnt;
1648 default:
1649 return NID_undef;
1650 }
1651}
1652
1653int
1654SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c)
1655{
1656 switch (c->algorithm_mac) {
1657 case SSL_AEAD:
1658 return NID_undef;
1659 case SSL_GOST89MAC:
1660 return NID_id_Gost28147_89_MAC;
1661 case SSL_GOST94:
1662 return NID_id_GostR3411_94;
1663 case SSL_MD5:
1664 return NID_md5;
1665 case SSL_SHA1:
1666 return NID_sha1;
1667 case SSL_SHA256:
1668 return NID_sha256;
1669 case SSL_SHA384:
1670 return NID_sha384;
1671 case SSL_STREEBOG256:
1672 return NID_id_tc26_gost3411_2012_256;
1673 default:
1674 return NID_undef;
1675 }
1676}
1677
1678int
1679SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c)
1680{
1681 switch (c->algorithm_mkey) {
1682 case SSL_kDHE:
1683 return NID_kx_dhe;
1684 case SSL_kECDHE:
1685 return NID_kx_ecdhe;
1686 case SSL_kGOST:
1687 return NID_kx_gost;
1688 case SSL_kRSA:
1689 return NID_kx_rsa;
1690 default:
1691 return NID_undef;
1692 }
1693}
1694
1695int
1696SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c)
1697{
1698 switch (c->algorithm_auth) {
1699 case SSL_aNULL:
1700 return NID_auth_null;
1701 case SSL_aECDSA:
1702 return NID_auth_ecdsa;
1703 case SSL_aGOST01:
1704 return NID_auth_gost01;
1705 case SSL_aRSA:
1706 return NID_auth_rsa;
1707 default:
1708 return NID_undef;
1709 }
1710}
1711
1712int
1713SSL_CIPHER_is_aead(const SSL_CIPHER *c)
1714{
1715 return (c->algorithm_mac & SSL_AEAD) == SSL_AEAD;
1716}
1717
1718void *
1719SSL_COMP_get_compression_methods(void)
1720{
1721 return NULL;
1722}
1723
1724int
1725SSL_COMP_add_compression_method(int id, void *cm)
1726{
1727 return 1;
1728}
1729
1730const char *
1731SSL_COMP_get_name(const void *comp)
1732{
1733 return NULL;
1734}
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2026-02-14 10:42:41 +0000