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1 /* ssl/ssl_ciph.c */
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 #include <openssl/objects.h>
145 #ifndef OPENSSL_NO_COMP
146 #include <openssl/comp.h>
147 #endif
148 #ifndef OPENSSL_NO_ENGINE
149 #include <openssl/engine.h>
150 #endif
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_RC2_IDX 3
157 #define SSL_ENC_IDEA_IDX 4
158 #define SSL_ENC_NULL_IDX 5
159 #define SSL_ENC_AES128_IDX 6
160 #define SSL_ENC_AES256_IDX 7
161 #define SSL_ENC_CAMELLIA128_IDX 8
162 #define SSL_ENC_CAMELLIA256_IDX 9
163 #define SSL_ENC_GOST89_IDX 10
164 #define SSL_ENC_SEED_IDX 11
165 #define SSL_ENC_AES128GCM_IDX 12
166 #define SSL_ENC_AES256GCM_IDX 13
167 #define SSL_ENC_NUM_IDX 14
168
169
170 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
171 NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL
172 };
173
174 #define SSL_COMP_NULL_IDX 0
175 #define SSL_COMP_ZLIB_IDX 1
176 #define SSL_COMP_NUM_IDX 2
177
178 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
179
180 #define SSL_MD_MD5_IDX 0
181 #define SSL_MD_SHA1_IDX 1
182 #define SSL_MD_GOST94_IDX 2
183 #define SSL_MD_GOST89MAC_IDX 3
184 #define SSL_MD_SHA256_IDX 4
185 #define SSL_MD_SHA384_IDX 5
186 /*Constant SSL_MAX_DIGEST equal to size of digests array should be
187 * defined in the
188 * ssl_locl.h */
189 #define SSL_MD_NUM_IDX SSL_MAX_DIGEST
190 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
191 NULL,NULL,NULL,NULL,NULL,NULL
192 };
193 /* PKEY_TYPE for GOST89MAC is known in advance, but, because
194 * implementation is engine-provided, we'll fill it only if
195 * corresponding EVP_PKEY_METHOD is found
196 */
197 static int ssl_mac_pkey_id[SSL_MD_NUM_IDX]={
198 EVP_PKEY_HMAC,EVP_PKEY_HMAC,EVP_PKEY_HMAC,NID_undef,
199 EVP_PKEY_HMAC,EVP_PKEY_HMAC
200 };
201
202 static int ssl_mac_secret_size[SSL_MD_NUM_IDX]={
203 0,0,0,0,0,0
204 };
205
206 static int ssl_handshake_digest_flag[SSL_MD_NUM_IDX]={
207 SSL_HANDSHAKE_MAC_MD5,SSL_HANDSHAKE_MAC_SHA,
208 SSL_HANDSHAKE_MAC_GOST94, 0, SSL_HANDSHAKE_MAC_SHA256,
209 SSL_HANDSHAKE_MAC_SHA384
210 };
211
212 #define CIPHER_ADD 1
213 #define CIPHER_KILL 2
214 #define CIPHER_DEL 3
215 #define CIPHER_ORD 4
216 #define CIPHER_SPECIAL 5
217
218 typedef struct cipher_order_st
219 {
220 const SSL_CIPHER *cipher;
221 int active;
222 int dead;
223 struct cipher_order_st *next,*prev;
224 } CIPHER_ORDER;
225
226 static const SSL_CIPHER cipher_aliases[]={
227 /* "ALL" doesn't include eNULL (must be specifically enabled) */
228 {0,SSL_TXT_ALL,0, 0,0,~SSL_eNULL,0,0,0,0,0,0},
229 /* "COMPLEMENTOFALL" */
230 {0,SSL_TXT_CMPALL,0, 0,0,SSL_eNULL,0,0,0,0,0,0},
231
232 /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */
233 {0,SSL_TXT_CMPDEF,0, SSL_kEDH|SSL_kEECDH,SSL_aNULL,~SSL_eNULL,0,0,0,0,0,0},
234
235 /* key exchange aliases
236 * (some of those using only a single bit here combine
237 * multiple key exchange algs according to the RFCs,
238 * e.g. kEDH combines DHE_DSS and DHE_RSA) */
239 {0,SSL_TXT_kRSA,0, SSL_kRSA, 0,0,0,0,0,0,0,0},
240
241 {0,SSL_TXT_kDHr,0, SSL_kDHr, 0,0,0,0,0,0,0,0},
242 {0,SSL_TXT_kDHd,0, SSL_kDHd, 0,0,0,0,0,0,0,0},
243 {0,SSL_TXT_kDH,0, SSL_kDHr|SSL_kDHd,0,0,0,0,0,0,0,0},
244 {0,SSL_TXT_kEDH,0, SSL_kEDH, 0,0,0,0,0,0,0,0},
245 {0,SSL_TXT_DH,0, SSL_kDHr|SSL_kDHd|SSL_kEDH,0,0,0,0,0,0,0,0},
246
247 {0,SSL_TXT_kKRB5,0, SSL_kKRB5, 0,0,0,0,0,0,0,0},
248
249 {0,SSL_TXT_kECDHr,0, SSL_kECDHr,0,0,0,0,0,0,0,0},
250 {0,SSL_TXT_kECDHe,0, SSL_kECDHe,0,0,0,0,0,0,0,0},
251 {0,SSL_TXT_kECDH,0, SSL_kECDHr|SSL_kECDHe,0,0,0,0,0,0,0,0},
252 {0,SSL_TXT_kEECDH,0, SSL_kEECDH,0,0,0,0,0,0,0,0},
253 {0,SSL_TXT_ECDH,0, SSL_kECDHr|SSL_kECDHe|SSL_kEECDH,0,0,0,0,0,0,0,0},
254
255 {0,SSL_TXT_kPSK,0, SSL_kPSK, 0,0,0,0,0,0,0,0},
256 {0,SSL_TXT_kSRP,0, SSL_kSRP, 0,0,0,0,0,0,0,0},
257 {0,SSL_TXT_kGOST,0, SSL_kGOST,0,0,0,0,0,0,0,0},
258
259 /* server authentication aliases */
260 {0,SSL_TXT_aRSA,0, 0,SSL_aRSA, 0,0,0,0,0,0,0},
261 {0,SSL_TXT_aDSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
262 {0,SSL_TXT_DSS,0, 0,SSL_aDSS, 0,0,0,0,0,0,0},
263 {0,SSL_TXT_aKRB5,0, 0,SSL_aKRB5, 0,0,0,0,0,0,0},
264 {0,SSL_TXT_aNULL,0, 0,SSL_aNULL, 0,0,0,0,0,0,0},
265 {0,SSL_TXT_aDH,0, 0,SSL_aDH, 0,0,0,0,0,0,0}, /* no such ciphersuites supported! */
266 {0,SSL_TXT_aECDH,0, 0,SSL_aECDH, 0,0,0,0,0,0,0},
267 {0,SSL_TXT_aECDSA,0, 0,SSL_aECDSA,0,0,0,0,0,0,0},
268 {0,SSL_TXT_ECDSA,0, 0,SSL_aECDSA, 0,0,0,0,0,0,0},
269 {0,SSL_TXT_aPSK,0, 0,SSL_aPSK, 0,0,0,0,0,0,0},
270 {0,SSL_TXT_aGOST94,0,0,SSL_aGOST94,0,0,0,0,0,0,0},
271 {0,SSL_TXT_aGOST01,0,0,SSL_aGOST01,0,0,0,0,0,0,0},
272 {0,SSL_TXT_aGOST,0,0,SSL_aGOST94|SSL_aGOST01,0,0,0,0,0,0,0},
273
274 /* aliases combining key exchange and server authentication */
275 {0,SSL_TXT_EDH,0, SSL_kEDH,~SSL_aNULL,0,0,0,0,0,0,0},
276 {0,SSL_TXT_EECDH,0, SSL_kEECDH,~SSL_aNULL,0,0,0,0,0,0,0},
277 {0,SSL_TXT_NULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
278 {0,SSL_TXT_KRB5,0, SSL_kKRB5,SSL_aKRB5,0,0,0,0,0,0,0},
279 {0,SSL_TXT_RSA,0, SSL_kRSA,SSL_aRSA,0,0,0,0,0,0,0},
280 {0,SSL_TXT_ADH,0, SSL_kEDH,SSL_aNULL,0,0,0,0,0,0,0},
281 {0,SSL_TXT_AECDH,0, SSL_kEECDH,SSL_aNULL,0,0,0,0,0,0,0},
282 {0,SSL_TXT_PSK,0, SSL_kPSK,SSL_aPSK,0,0,0,0,0,0,0},
283 {0,SSL_TXT_SRP,0, SSL_kSRP,0,0,0,0,0,0,0,0},
284
285
286 /* symmetric encryption aliases */
287 {0,SSL_TXT_DES,0, 0,0,SSL_DES, 0,0,0,0,0,0},
288 {0,SSL_TXT_3DES,0, 0,0,SSL_3DES, 0,0,0,0,0,0},
289 {0,SSL_TXT_RC4,0, 0,0,SSL_RC4, 0,0,0,0,0,0},
290 {0,SSL_TXT_RC2,0, 0,0,SSL_RC2, 0,0,0,0,0,0},
291 {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0},
292 {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0},
293 {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0},
294 {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0},
295 {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0},
296 {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0},
297 {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0},
298 {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0},
299 {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0},
300 {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0},
301 {0,SSL_TXT_CHACHA20 ,0,0,0,SSL_CHACHA20POLY1305,0,0,0,0,0,0},
302
303 /* MAC aliases */
304 {0,SSL_TXT_MD5,0, 0,0,0,SSL_MD5, 0,0,0,0,0},
305 {0,SSL_TXT_SHA1,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
306 {0,SSL_TXT_SHA,0, 0,0,0,SSL_SHA1, 0,0,0,0,0},
307 {0,SSL_TXT_GOST94,0, 0,0,0,SSL_GOST94, 0,0,0,0,0},
308 {0,SSL_TXT_GOST89MAC,0, 0,0,0,SSL_GOST89MAC, 0,0,0,0,0},
309 {0,SSL_TXT_SHA256,0, 0,0,0,SSL_SHA256, 0,0,0,0,0},
310 {0,SSL_TXT_SHA384,0, 0,0,0,SSL_SHA384, 0,0,0,0,0},
311
312 /* protocol version aliases */
313 {0,SSL_TXT_SSLV2,0, 0,0,0,0,SSL_SSLV2, 0,0,0,0},
314 {0,SSL_TXT_SSLV3,0, 0,0,0,0,SSL_SSLV3, 0,0,0,0},
315 {0,SSL_TXT_TLSV1,0, 0,0,0,0,SSL_TLSV1, 0,0,0,0},
316 {0,SSL_TXT_TLSV1_2,0, 0,0,0,0,SSL_TLSV1_2, 0,0,0,0},
317
318 /* export flag */
319 {0,SSL_TXT_EXP,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
320 {0,SSL_TXT_EXPORT,0, 0,0,0,0,0,SSL_EXPORT,0,0,0},
321
322 /* strength classes */
323 {0,SSL_TXT_EXP40,0, 0,0,0,0,0,SSL_EXP40, 0,0,0},
324 {0,SSL_TXT_EXP56,0, 0,0,0,0,0,SSL_EXP56, 0,0,0},
325 {0,SSL_TXT_LOW,0, 0,0,0,0,0,SSL_LOW, 0,0,0},
326 {0,SSL_TXT_MEDIUM,0, 0,0,0,0,0,SSL_MEDIUM,0,0,0},
327 {0,SSL_TXT_HIGH,0, 0,0,0,0,0,SSL_HIGH, 0,0,0},
328 /* FIPS 140-2 approved ciphersuite */
329 {0,SSL_TXT_FIPS,0, 0,0,~SSL_eNULL,0,0,SSL_FIPS, 0,0,0},
330 };
331 /* Search for public key algorithm with given name and
332 * return its pkey_id if it is available. Otherwise return 0
333 */
334 #ifdef OPENSSL_NO_ENGINE
335
336 static int get_optional_pkey_id(const char *pkey_name)
337 {
338 const EVP_PKEY_ASN1_METHOD *ameth;
339 int pkey_id=0;
340 ameth = EVP_PKEY_asn1_find_str(NULL,pkey_name,-1);
341 if (ameth)
342 {
343 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
344 }
345 return pkey_id;
346 }
347
348 #else
349
350 static int get_optional_pkey_id(const char *pkey_name)
351 {
352 const EVP_PKEY_ASN1_METHOD *ameth;
353 ENGINE *tmpeng = NULL;
354 int pkey_id=0;
355 ameth = EVP_PKEY_asn1_find_str(&tmpeng,pkey_name,-1);
356 if (ameth)
357 {
358 EVP_PKEY_asn1_get0_info(&pkey_id, NULL,NULL,NULL,NULL,ameth);
359 }
360 if (tmpeng) ENGINE_finish(tmpeng);
361 return pkey_id;
362 }
363
364 #endif
365
366 void ssl_load_ciphers(void)
367 {
368 ssl_cipher_methods[SSL_ENC_DES_IDX]=
369 EVP_get_cipherbyname(SN_des_cbc);
370 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
371 EVP_get_cipherbyname(SN_des_ede3_cbc);
372 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
373 EVP_get_cipherbyname(SN_rc4);
374 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
375 EVP_get_cipherbyname(SN_rc2_cbc);
376 #ifndef OPENSSL_NO_IDEA
377 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
378 EVP_get_cipherbyname(SN_idea_cbc);
379 #else
380 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
381 #endif
382 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
383 EVP_get_cipherbyname(SN_aes_128_cbc);
384 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
385 EVP_get_cipherbyname(SN_aes_256_cbc);
386 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
387 EVP_get_cipherbyname(SN_camellia_128_cbc);
388 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
389 EVP_get_cipherbyname(SN_camellia_256_cbc);
390 ssl_cipher_methods[SSL_ENC_GOST89_IDX]=
391 EVP_get_cipherbyname(SN_gost89_cnt);
392 ssl_cipher_methods[SSL_ENC_SEED_IDX]=
393 EVP_get_cipherbyname(SN_seed_cbc);
394
395 ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]=
396 EVP_get_cipherbyname(SN_aes_128_gcm);
397 ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]=
398 EVP_get_cipherbyname(SN_aes_256_gcm);
399
400 ssl_digest_methods[SSL_MD_MD5_IDX]=
401 EVP_get_digestbyname(SN_md5);
402 ssl_mac_secret_size[SSL_MD_MD5_IDX]=
403 EVP_MD_size(ssl_digest_methods[SSL_MD_MD5_IDX]);
404 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_MD5_IDX] >= 0);
405 ssl_digest_methods[SSL_MD_SHA1_IDX]=
406 EVP_get_digestbyname(SN_sha1);
407 ssl_mac_secret_size[SSL_MD_SHA1_IDX]=
408 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA1_IDX]);
409 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_SHA1_IDX] >= 0);
410 ssl_digest_methods[SSL_MD_GOST94_IDX]=
411 EVP_get_digestbyname(SN_id_GostR3411_94);
412 if (ssl_digest_methods[SSL_MD_GOST94_IDX])
413 {
414 ssl_mac_secret_size[SSL_MD_GOST94_IDX]=
415 EVP_MD_size(ssl_digest_methods[SSL_MD_GOST94_IDX]);
416 OPENSSL_assert(ssl_mac_secret_size[SSL_MD_GOST94_IDX] >= 0);
417 }
418 ssl_digest_methods[SSL_MD_GOST89MAC_IDX]=
419 EVP_get_digestbyname(SN_id_Gost28147_89_MAC);
420 ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX] = get_optional_pkey_id("gost-mac");
421 if (ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]) {
422 ssl_mac_secret_size[SSL_MD_GOST89MAC_IDX]=32;
423 }
424
425 ssl_digest_methods[SSL_MD_SHA256_IDX]=
426 EVP_get_digestbyname(SN_sha256);
427 ssl_mac_secret_size[SSL_MD_SHA256_IDX]=
428 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA256_IDX]);
429 ssl_digest_methods[SSL_MD_SHA384_IDX]=
430 EVP_get_digestbyname(SN_sha384);
431 ssl_mac_secret_size[SSL_MD_SHA384_IDX]=
432 EVP_MD_size(ssl_digest_methods[SSL_MD_SHA384_IDX]);
433 }
434 #ifndef OPENSSL_NO_COMP
435
436 static int sk_comp_cmp(const SSL_COMP * const *a,
437 const SSL_COMP * const *b)
438 {
439 return((*a)->id-(*b)->id);
440 }
441
442 static void load_builtin_compressions(void)
443 {
444 int got_write_lock = 0;
445
446 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
447 if (ssl_comp_methods == NULL)
448 {
449 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
450 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
451 got_write_lock = 1;
452
453 if (ssl_comp_methods == NULL)
454 {
455 SSL_COMP *comp = NULL;
456
457 MemCheck_off();
458 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
459 if (ssl_comp_methods != NULL)
460 {
461 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
462 if (comp != NULL)
463 {
464 comp->method=COMP_zlib();
465 if (comp->method
466 && comp->method->type == NID_undef)
467 OPENSSL_free(comp);
468 else
469 {
470 comp->id=SSL_COMP_ZLIB_IDX;
471 comp->name=comp->method->name;
472 sk_SSL_COMP_push(ssl_comp_methods,comp);
473 }
474 }
475 sk_SSL_COMP_sort(ssl_comp_methods);
476 }
477 MemCheck_on();
478 }
479 }
480
481 if (got_write_lock)
482 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
483 else
484 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
485 }
486 #endif
487
488 /* ssl_cipher_get_comp sets |comp| to the correct SSL_COMP for the given
489 * session and returns 1. On error it returns 0. */
490 int ssl_cipher_get_comp(const SSL_SESSION *s, SSL_COMP **comp)
491 {
492 int i;
493
494 SSL_COMP ctmp;
495 #ifndef OPENSSL_NO_COMP
496 load_builtin_compressions();
497 #endif
498
499 *comp=NULL;
500 ctmp.id=s->compress_meth;
501 if (ssl_comp_methods != NULL)
502 {
503 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
504 if (i >= 0)
505 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
506 else
507 *comp=NULL;
508 }
509
510 return 1;
511 }
512
513 /* ssl_cipher_get_evp_aead sets |*aead| to point to the correct EVP_AEAD object
514 * for |s->cipher|. It returns 1 on success and 0 on error. */
515 int ssl_cipher_get_evp_aead(const SSL_SESSION *s, const EVP_AEAD **aead)
516 {
517 const SSL_CIPHER *c = s->cipher;
518
519 *aead = NULL;
520
521 if (c == NULL)
522 return 0;
523 if ((c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD) == 0)
524 return 0;
525
526 switch (c->algorithm_enc)
527 {
528 #ifndef OPENSSL_NO_AES
529 case SSL_AES128GCM:
530 *aead = EVP_aead_aes_128_gcm();
531 return 1;
532 case SSL_AES256GCM:
533 *aead = EVP_aead_aes_256_gcm();
534 return 1;
535 #endif
536 #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305)
537 case SSL_CHACHA20POLY1305:
538 *aead = EVP_aead_chacha20_poly1305();
539 return 1;
540 #endif
541 }
542
543 return 0;
544 }
545
546 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
547 const EVP_MD **md, int *mac_pkey_type, int *mac_secret_size)
548 {
549 int i;
550 const SSL_CIPHER *c;
551
552 c=s->cipher;
553 if (c == NULL) return(0);
554
555 /* This function doesn't deal with EVP_AEAD. See
556 * |ssl_cipher_get_aead_evp|. */
557 if (c->algorithm2 & SSL_CIPHER_ALGORITHM2_AEAD)
558 return(0);
559
560 if ((enc == NULL) || (md == NULL)) return(0);
561
562 switch (c->algorithm_enc)
563 {
564 case SSL_DES:
565 i=SSL_ENC_DES_IDX;
566 break;
567 case SSL_3DES:
568 i=SSL_ENC_3DES_IDX;
569 break;
570 case SSL_RC4:
571 i=SSL_ENC_RC4_IDX;
572 break;
573 case SSL_RC2:
574 i=SSL_ENC_RC2_IDX;
575 break;
576 case SSL_IDEA:
577 i=SSL_ENC_IDEA_IDX;
578 break;
579 case SSL_eNULL:
580 i=SSL_ENC_NULL_IDX;
581 break;
582 case SSL_AES128:
583 i=SSL_ENC_AES128_IDX;
584 break;
585 case SSL_AES256:
586 i=SSL_ENC_AES256_IDX;
587 break;
588 case SSL_CAMELLIA128:
589 i=SSL_ENC_CAMELLIA128_IDX;
590 break;
591 case SSL_CAMELLIA256:
592 i=SSL_ENC_CAMELLIA256_IDX;
593 break;
594 case SSL_eGOST2814789CNT:
595 i=SSL_ENC_GOST89_IDX;
596 break;
597 case SSL_SEED:
598 i=SSL_ENC_SEED_IDX;
599 break;
600 case SSL_AES128GCM:
601 i=SSL_ENC_AES128GCM_IDX;
602 break;
603 case SSL_AES256GCM:
604 i=SSL_ENC_AES256GCM_IDX;
605 break;
606 default:
607 i= -1;
608 break;
609 }
610
611 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
612 *enc=NULL;
613 else
614 {
615 if (i == SSL_ENC_NULL_IDX)
616 *enc=EVP_enc_null();
617 else
618 *enc=ssl_cipher_methods[i];
619 }
620
621 switch (c->algorithm_mac)
622 {
623 case SSL_MD5:
624 i=SSL_MD_MD5_IDX;
625 break;
626 case SSL_SHA1:
627 i=SSL_MD_SHA1_IDX;
628 break;
629 case SSL_SHA256:
630 i=SSL_MD_SHA256_IDX;
631 break;
632 case SSL_SHA384:
633 i=SSL_MD_SHA384_IDX;
634 break;
635 case SSL_GOST94:
636 i = SSL_MD_GOST94_IDX;
637 break;
638 case SSL_GOST89MAC:
639 i = SSL_MD_GOST89MAC_IDX;
640 break;
641 default:
642 i= -1;
643 break;
644 }
645 if ((i < 0) || (i > SSL_MD_NUM_IDX))
646 {
647 *md=NULL;
648 if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef;
649 if (mac_secret_size!=NULL) *mac_secret_size = 0;
650 if (c->algorithm_mac == SSL_AEAD)
651 mac_pkey_type = NULL;
652 }
653 else
654 {
655 *md=ssl_digest_methods[i];
656 if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i];
657 if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i];
658 }
659
660 if ((*enc != NULL) &&
661 (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) &&
662 (!mac_pkey_type||*mac_pkey_type != NID_undef))
663 {
664 const EVP_CIPHER *evp;
665
666 if (s->ssl_version>>8 != TLS1_VERSION_MAJOR ||
667 s->ssl_version < TLS1_VERSION)
668 return 1;
669
670 #ifdef OPENSSL_FIPS
671 if (FIPS_mode())
672 return 1;
673 #endif
674
675 if (c->algorithm_enc == SSL_RC4 &&
676 c->algorithm_mac == SSL_MD5 &&
677 (evp=EVP_get_cipherbyname("RC4-HMAC-MD5")))
678 *enc = evp, *md = NULL;
679 else if (c->algorithm_enc == SSL_AES128 &&
680 c->algorithm_mac == SSL_SHA1 &&
681 (evp=EVP_get_cipherbyname("AES-128-CBC-HMAC-SHA1")))
682 *enc = evp, *md = NULL;
683 else if (c->algorithm_enc == SSL_AES256 &&
684 c->algorithm_mac == SSL_SHA1 &&
685 (evp=EVP_get_cipherbyname("AES-256-CBC-HMAC-SHA1")))
686 *enc = evp, *md = NULL;
687 return(1);
688 }
689 else
690 return(0);
691 }
692
693 int ssl_get_handshake_digest(int idx, long *mask, const EVP_MD **md)
694 {
695 if (idx <0||idx>=SSL_MD_NUM_IDX)
696 {
697 return 0;
698 }
699 *mask = ssl_handshake_digest_flag[idx];
700 if (*mask)
701 *md = ssl_digest_methods[idx];
702 else
703 *md = NULL;
704 return 1;
705 }
706
707 #define ITEM_SEP(a) \
708 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
709
710 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
711 CIPHER_ORDER **tail)
712 {
713 if (curr == *tail) return;
714 if (curr == *head)
715 *head=curr->next;
716 if (curr->prev != NULL)
717 curr->prev->next=curr->next;
718 if (curr->next != NULL)
719 curr->next->prev=curr->prev;
720 (*tail)->next=curr;
721 curr->prev= *tail;
722 curr->next=NULL;
723 *tail=curr;
724 }
725
726 static void ll_append_head(CIPHER_ORDER **head, CIPHER_ORDER *curr,
727 CIPHER_ORDER **tail)
728 {
729 if (curr == *head) return;
730 if (curr == *tail)
731 *tail=curr->prev;
732 if (curr->next != NULL)
733 curr->next->prev=curr->prev;
734 if (curr->prev != NULL)
735 curr->prev->next=curr->next;
736 (*head)->prev=curr;
737 curr->next= *head;
738 curr->prev=NULL;
739 *head=curr;
740 }
741
742 static void ssl_cipher_get_disabled(unsigned long *mkey, unsigned long *auth, unsigned long *enc, unsigned long *mac, unsigned long *ssl)
743 {
744 *mkey = 0;
745 *auth = 0;
746 *enc = 0;
747 *mac = 0;
748 *ssl = 0;
749
750 #ifdef OPENSSL_NO_RSA
751 *mkey |= SSL_kRSA;
752 *auth |= SSL_aRSA;
753 #endif
754 #ifdef OPENSSL_NO_DSA
755 *auth |= SSL_aDSS;
756 #endif
757 #ifdef OPENSSL_NO_DH
758 *mkey |= SSL_kDHr|SSL_kDHd|SSL_kEDH;
759 *auth |= SSL_aDH;
760 #endif
761 #ifdef OPENSSL_NO_KRB5
762 *mkey |= SSL_kKRB5;
763 *auth |= SSL_aKRB5;
764 #endif
765 #ifdef OPENSSL_NO_ECDSA
766 *auth |= SSL_aECDSA;
767 #endif
768 #ifdef OPENSSL_NO_ECDH
769 *mkey |= SSL_kECDHe|SSL_kECDHr;
770 *auth |= SSL_aECDH;
771 #endif
772 #ifdef OPENSSL_NO_PSK
773 *mkey |= SSL_kPSK;
774 *auth |= SSL_aPSK;
775 #endif
776 #ifdef OPENSSL_NO_SRP
777 *mkey |= SSL_kSRP;
778 #endif
779 /* Check for presence of GOST 34.10 algorithms, and if they
780 * do not present, disable appropriate auth and key exchange */
781 if (!get_optional_pkey_id("gost94")) {
782 *auth |= SSL_aGOST94;
783 }
784 if (!get_optional_pkey_id("gost2001")) {
785 *auth |= SSL_aGOST01;
786 }
787 /* Disable GOST key exchange if no GOST signature algs are available * */
788 if ((*auth & (SSL_aGOST94|SSL_aGOST01)) == (SSL_aGOST94|SSL_aGOST01)) {
789 *mkey |= SSL_kGOST;
790 }
791 #ifdef SSL_FORBID_ENULL
792 *enc |= SSL_eNULL;
793 #endif
794
795
796
797 *enc |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
798 *enc |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
799 *enc |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
800 *enc |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
801 *enc |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
802 *enc |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES128:0;
803 *enc |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES256:0;
804 *enc |= (ssl_cipher_methods[SSL_ENC_AES128GCM_IDX] == NULL) ? SSL_AES128GCM:0;
805 *enc |= (ssl_cipher_methods[SSL_ENC_AES256GCM_IDX] == NULL) ? SSL_AES256GCM:0;
806 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA128:0;
807 *enc |= (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] == NULL) ? SSL_CAMELLIA256:0;
808 *enc |= (ssl_cipher_methods[SSL_ENC_GOST89_IDX] == NULL) ? SSL_eGOST2814789CNT:0;
809 *enc |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED:0;
810
811 *mac |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
812 *mac |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
813 *mac |= (ssl_digest_methods[SSL_MD_SHA256_IDX] == NULL) ? SSL_SHA256:0;
814 *mac |= (ssl_digest_methods[SSL_MD_SHA384_IDX] == NULL) ? SSL_SHA384:0;
815 *mac |= (ssl_digest_methods[SSL_MD_GOST94_IDX] == NULL) ? SSL_GOST94:0;
816 *mac |= (ssl_digest_methods[SSL_MD_GOST89MAC_IDX] == NULL || ssl_mac_pkey_id[SSL_MD_GOST89MAC_IDX]==NID_undef)? SSL_GOST89MAC:0;
817
818 }
819
820 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
821 int num_of_ciphers,
822 unsigned long disabled_mkey, unsigned long disabled_auth,
823 unsigned long disabled_enc, unsigned long disabled_mac,
824 unsigned long disabled_ssl,
825 CIPHER_ORDER *co_list,
826 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
827 {
828 int i, co_list_num;
829 const SSL_CIPHER *c;
830
831 /*
832 * We have num_of_ciphers descriptions compiled in, depending on the
833 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
834 * These will later be sorted in a linked list with at most num
835 * entries.
836 */
837
838 /* Get the initial list of ciphers */
839 co_list_num = 0; /* actual count of ciphers */
840 for (i = 0; i < num_of_ciphers; i++)
841 {
842 c = ssl_method->get_cipher(i);
843 /* drop those that use any of that is not available */
844 if ((c != NULL) && c->valid &&
845 #ifdef OPENSSL_FIPS
846 (!FIPS_mode() || (c->algo_strength & SSL_FIPS)) &&
847 #endif
848 !(c->algorithm_mkey & disabled_mkey) &&
849 !(c->algorithm_auth & disabled_auth) &&
850 !(c->algorithm_enc & disabled_enc) &&
851 !(c->algorithm_mac & disabled_mac) &&
852 !(c->algorithm_ssl & disabled_ssl))
853 {
854 co_list[co_list_num].cipher = c;
855 co_list[co_list_num].next = NULL;
856 co_list[co_list_num].prev = NULL;
857 co_list[co_list_num].active = 0;
858 co_list_num++;
859 #ifdef KSSL_DEBUG
860 printf("\t%d: %s %lx %lx %lx\n",i,c->name,c->id,c->algorithm_mkey,c->algorithm_auth);
861 #endif /* KSSL_DEBUG */
862 /*
863 if (!sk_push(ca_list,(char *)c)) goto err;
864 */
865 }
866 }
867
868 /*
869 * Prepare linked list from list entries
870 */
871 if (co_list_num > 0)
872 {
873 co_list[0].prev = NULL;
874
875 if (co_list_num > 1)
876 {
877 co_list[0].next = &co_list[1];
878
879 for (i = 1; i < co_list_num - 1; i++)
880 {
881 co_list[i].prev = &co_list[i - 1];
882 co_list[i].next = &co_list[i + 1];
883 }
884
885 co_list[co_list_num - 1].prev = &co_list[co_list_num - 2];
886 }
887
888 co_list[co_list_num - 1].next = NULL;
889
890 *head_p = &co_list[0];
891 *tail_p = &co_list[co_list_num - 1];
892 }
893 }
894
895 static void ssl_cipher_collect_aliases(const SSL_CIPHER **ca_list,
896 int num_of_group_aliases,
897 unsigned long disabled_mkey, unsigned long disabled_auth,
898 unsigned long disabled_enc, unsigned long disabled_mac,
899 unsigned long disabled_ssl,
900 CIPHER_ORDER *head)
901 {
902 CIPHER_ORDER *ciph_curr;
903 const SSL_CIPHER **ca_curr;
904 int i;
905 unsigned long mask_mkey = ~disabled_mkey;
906 unsigned long mask_auth = ~disabled_auth;
907 unsigned long mask_enc = ~disabled_enc;
908 unsigned long mask_mac = ~disabled_mac;
909 unsigned long mask_ssl = ~disabled_ssl;
910
911 /*
912 * First, add the real ciphers as already collected
913 */
914 ciph_curr = head;
915 ca_curr = ca_list;
916 while (ciph_curr != NULL)
917 {
918 *ca_curr = ciph_curr->cipher;
919 ca_curr++;
920 ciph_curr = ciph_curr->next;
921 }
922
923 /*
924 * Now we add the available ones from the cipher_aliases[] table.
925 * They represent either one or more algorithms, some of which
926 * in any affected category must be supported (set in enabled_mask),
927 * or represent a cipher strength value (will be added in any case because algorithms=0).
928 */
929 for (i = 0; i < num_of_group_aliases; i++)
930 {
931 unsigned long algorithm_mkey = cipher_aliases[i].algorithm_mkey;
932 unsigned long algorithm_auth = cipher_aliases[i].algorithm_auth;
933 unsigned long algorithm_enc = cipher_aliases[i].algorithm_enc;
934 unsigned long algorithm_mac = cipher_aliases[i].algorithm_mac;
935 unsigned long algorithm_ssl = cipher_aliases[i].algorithm_ssl;
936
937 if (algorithm_mkey)
938 if ((algorithm_mkey & mask_mkey) == 0)
939 continue;
940
941 if (algorithm_auth)
942 if ((algorithm_auth & mask_auth) == 0)
943 continue;
944
945 if (algorithm_enc)
946 if ((algorithm_enc & mask_enc) == 0)
947 continue;
948
949 if (algorithm_mac)
950 if ((algorithm_mac & mask_mac) == 0)
951 continue;
952
953 if (algorithm_ssl)
954 if ((algorithm_ssl & mask_ssl) == 0)
955 continue;
956
957 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
958 ca_curr++;
959 }
960
961 *ca_curr = NULL; /* end of list */
962 }
963
964 static void ssl_cipher_apply_rule(unsigned long cipher_id,
965 unsigned long alg_mkey, unsigned long alg_auth,
966 unsigned long alg_enc, unsigned long alg_mac,
967 unsigned long alg_ssl,
968 unsigned long algo_strength,
969 int rule, int strength_bits,
970 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
971 {
972 CIPHER_ORDER *head, *tail, *curr, *curr2, *last;
973 const SSL_CIPHER *cp;
974 int reverse = 0;
975
976 #ifdef CIPHER_DEBUG
977 printf("Applying rule %d with %08lx/%08lx/%08lx/%08lx/%08lx %08lx (%d)\n",
978 rule, alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength, strength_bits);
979 #endif
980
981 if (rule == CIPHER_DEL)
982 reverse = 1; /* needed to maintain sorting between currently deleted ciphers */
983
984 head = *head_p;
985 tail = *tail_p;
986
987 if (reverse)
988 {
989 curr = tail;
990 last = head;
991 }
992 else
993 {
994 curr = head;
995 last = tail;
996 }
997
998 curr2 = curr;
999 for (;;)
1000 {
1001 if ((curr == NULL) || (curr == last)) break;
1002 curr = curr2;
1003 curr2 = reverse ? curr->prev : curr->next;
1004
1005 cp = curr->cipher;
1006
1007 /*
1008 * Selection criteria is either the value of strength_bits
1009 * or the algorithms used.
1010 */
1011 if (strength_bits >= 0)
1012 {
1013 if (strength_bits != cp->strength_bits)
1014 continue;
1015 }
1016 else
1017 {
1018 #ifdef CIPHER_DEBUG
1019 printf("\nName: %s:\nAlgo = %08lx/%08lx/%08lx/%08lx/%08lx Algo_strength = %08lx\n", cp->name, cp->algorithm_mkey, cp->algorithm_auth, cp->algorithm_enc, cp->algorithm_mac, cp->algorithm_ssl, cp->algo_strength);
1020 #endif
1021 #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL
1022 if (cipher_id && cipher_id != cp->id)
1023 continue;
1024 #endif
1025 if (alg_mkey && !(alg_mkey & cp->algorithm_mkey))
1026 continue;
1027 if (alg_auth && !(alg_auth & cp->algorithm_auth))
1028 continue;
1029 if (alg_enc && !(alg_enc & cp->algorithm_enc))
1030 continue;
1031 if (alg_mac && !(alg_mac & cp->algorithm_mac))
1032 continue;
1033 if (alg_ssl && !(alg_ssl & cp->algorithm_ssl))
1034 continue;
1035 if ((algo_strength & SSL_EXP_MASK) && !(algo_strength & SSL_EXP_MASK & cp->algo_strength))
1036 continue;
1037 if ((algo_strength & SSL_STRONG_MASK) && !(algo_strength & SSL_STRONG_MASK & cp->algo_strength))
1038 continue;
1039 }
1040
1041 #ifdef CIPHER_DEBUG
1042 printf("Action = %d\n", rule);
1043 #endif
1044
1045 /* add the cipher if it has not been added yet. */
1046 if (rule == CIPHER_ADD)
1047 {
1048 /* reverse == 0 */
1049 if (!curr->active)
1050 {
1051 ll_append_tail(&head, curr, &tail);
1052 curr->active = 1;
1053 }
1054 }
1055 /* Move the added cipher to this location */
1056 else if (rule == CIPHER_ORD)
1057 {
1058 /* reverse == 0 */
1059 if (curr->active)
1060 {
1061 ll_append_tail(&head, curr, &tail);
1062 }
1063 }
1064 else if (rule == CIPHER_DEL)
1065 {
1066 /* reverse == 1 */
1067 if (curr->active)
1068 {
1069 /* most recently deleted ciphersuites get best positions
1070 * for any future CIPHER_ADD (note that the CIPHER_DEL loop
1071 * works in reverse to maintain the order) */
1072 ll_append_head(&head, curr, &tail);
1073 curr->active = 0;
1074 }
1075 }
1076 else if (rule == CIPHER_KILL)
1077 {
1078 /* reverse == 0 */
1079 if (head == curr)
1080 head = curr->next;
1081 else
1082 curr->prev->next = curr->next;
1083 if (tail == curr)
1084 tail = curr->prev;
1085 curr->active = 0;
1086 if (curr->next != NULL)
1087 curr->next->prev = curr->prev;
1088 if (curr->prev != NULL)
1089 curr->prev->next = curr->next;
1090 curr->next = NULL;
1091 curr->prev = NULL;
1092 }
1093 }
1094
1095 *head_p = head;
1096 *tail_p = tail;
1097 }
1098
1099 static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p,
1100 CIPHER_ORDER **tail_p)
1101 {
1102 int max_strength_bits, i, *number_uses;
1103 CIPHER_ORDER *curr;
1104
1105 /*
1106 * This routine sorts the ciphers with descending strength. The sorting
1107 * must keep the pre-sorted sequence, so we apply the normal sorting
1108 * routine as '+' movement to the end of the list.
1109 */
1110 max_strength_bits = 0;
1111 curr = *head_p;
1112 while (curr != NULL)
1113 {
1114 if (curr->active &&
1115 (curr->cipher->strength_bits > max_strength_bits))
1116 max_strength_bits = curr->cipher->strength_bits;
1117 curr = curr->next;
1118 }
1119
1120 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
1121 if (!number_uses)
1122 {
1123 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
1124 return(0);
1125 }
1126 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
1127
1128 /*
1129 * Now find the strength_bits values actually used
1130 */
1131 curr = *head_p;
1132 while (curr != NULL)
1133 {
1134 if (curr->active)
1135 number_uses[curr->cipher->strength_bits]++;
1136 curr = curr->next;
1137 }
1138 /*
1139 * Go through the list of used strength_bits values in descending
1140 * order.
1141 */
1142 for (i = max_strength_bits; i >= 0; i--)
1143 if (number_uses[i] > 0)
1144 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ORD, i, head_p, tail_p);
1145
1146 OPENSSL_free(number_uses);
1147 return(1);
1148 }
1149
1150 static int ssl_cipher_process_rulestr(const char *rule_str,
1151 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p,
1152 const SSL_CIPHER **ca_list)
1153 {
1154 unsigned long alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength;
1155 const char *l, *buf;
1156 int j, multi, found, rule, retval, ok, buflen;
1157 unsigned long cipher_id = 0;
1158 char ch;
1159
1160 retval = 1;
1161 l = rule_str;
1162 for (;;)
1163 {
1164 ch = *l;
1165
1166 if (ch == '\0')
1167 break; /* done */
1168 if (ch == '-')
1169 { rule = CIPHER_DEL; l++; }
1170 else if (ch == '+')
1171 { rule = CIPHER_ORD; l++; }
1172 else if (ch == '!')
1173 { rule = CIPHER_KILL; l++; }
1174 else if (ch == '@')
1175 { rule = CIPHER_SPECIAL; l++; }
1176 else
1177 { rule = CIPHER_ADD; }
1178
1179 if (ITEM_SEP(ch))
1180 {
1181 l++;
1182 continue;
1183 }
1184
1185 alg_mkey = 0;
1186 alg_auth = 0;
1187 alg_enc = 0;
1188 alg_mac = 0;
1189 alg_ssl = 0;
1190 algo_strength = 0;
1191
1192 for (;;)
1193 {
1194 ch = *l;
1195 buf = l;
1196 buflen = 0;
1197 #ifndef CHARSET_EBCDIC
1198 while ( ((ch >= 'A') && (ch <= 'Z')) ||
1199 ((ch >= '0') && (ch <= '9')) ||
1200 ((ch >= 'a') && (ch <= 'z')) ||
1201 (ch == '-') || (ch == '.'))
1202 #else
1203 while ( isalnum(ch) || (ch == '-') || (ch == '.'))
1204 #endif
1205 {
1206 ch = *(++l);
1207 buflen++;
1208 }
1209
1210 if (buflen == 0)
1211 {
1212 /*
1213 * We hit something we cannot deal with,
1214 * it is no command or separator nor
1215 * alphanumeric, so we call this an error.
1216 */
1217 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1218 SSL_R_INVALID_COMMAND);
1219 retval = found = 0;
1220 l++;
1221 break;
1222 }
1223
1224 if (rule == CIPHER_SPECIAL)
1225 {
1226 found = 0; /* unused -- avoid compiler warning */
1227 break; /* special treatment */
1228 }
1229
1230 /* check for multi-part specification */
1231 if (ch == '+')
1232 {
1233 multi=1;
1234 l++;
1235 }
1236 else
1237 multi=0;
1238
1239 /*
1240 * Now search for the cipher alias in the ca_list. Be careful
1241 * with the strncmp, because the "buflen" limitation
1242 * will make the rule "ADH:SOME" and the cipher
1243 * "ADH-MY-CIPHER" look like a match for buflen=3.
1244 * So additionally check whether the cipher name found
1245 * has the correct length. We can save a strlen() call:
1246 * just checking for the '\0' at the right place is
1247 * sufficient, we have to strncmp() anyway. (We cannot
1248 * use strcmp(), because buf is not '\0' terminated.)
1249 */
1250 j = found = 0;
1251 cipher_id = 0;
1252 while (ca_list[j])
1253 {
1254 if (!strncmp(buf, ca_list[j]->name, buflen) &&
1255 (ca_list[j]->name[buflen] == '\0'))
1256 {
1257 found = 1;
1258 break;
1259 }
1260 else
1261 j++;
1262 }
1263
1264 if (!found)
1265 break; /* ignore this entry */
1266
1267 if (ca_list[j]->algorithm_mkey)
1268 {
1269 if (alg_mkey)
1270 {
1271 alg_mkey &= ca_list[j]->algorithm_mkey;
1272 if (!alg_mkey) { found = 0; break; }
1273 }
1274 else
1275 alg_mkey = ca_list[j]->algorithm_mkey;
1276 }
1277
1278 if (ca_list[j]->algorithm_auth)
1279 {
1280 if (alg_auth)
1281 {
1282 alg_auth &= ca_list[j]->algorithm_auth;
1283 if (!alg_auth) { found = 0; break; }
1284 }
1285 else
1286 alg_auth = ca_list[j]->algorithm_auth;
1287 }
1288
1289 if (ca_list[j]->algorithm_enc)
1290 {
1291 if (alg_enc)
1292 {
1293 alg_enc &= ca_list[j]->algorithm_enc;
1294 if (!alg_enc) { found = 0; break; }
1295 }
1296 else
1297 alg_enc = ca_list[j]->algorithm_enc;
1298 }
1299
1300 if (ca_list[j]->algorithm_mac)
1301 {
1302 if (alg_mac)
1303 {
1304 alg_mac &= ca_list[j]->algorithm_mac;
1305 if (!alg_mac) { found = 0; break; }
1306 }
1307 else
1308 alg_mac = ca_list[j]->algorithm_mac;
1309 }
1310
1311 if (ca_list[j]->algo_strength & SSL_EXP_MASK)
1312 {
1313 if (algo_strength & SSL_EXP_MASK)
1314 {
1315 algo_strength &= (ca_list[j]->algo_strength & SSL_EXP_MASK) | ~SSL_EXP_MASK;
1316 if (!(algo_strength & SSL_EXP_MASK)) { found = 0; break; }
1317 }
1318 else
1319 algo_strength |= ca_list[j]->algo_strength & SSL_EXP_MASK;
1320 }
1321
1322 if (ca_list[j]->algo_strength & SSL_STRONG_MASK)
1323 {
1324 if (algo_strength & SSL_STRONG_MASK)
1325 {
1326 algo_strength &= (ca_list[j]->algo_strength & SSL_STRONG_MASK) | ~SSL_STRONG_MASK;
1327 if (!(algo_strength & SSL_STRONG_MASK)) { found = 0; break; }
1328 }
1329 else
1330 algo_strength |= ca_list[j]->algo_strength & SSL_STRONG_MASK;
1331 }
1332
1333 if (ca_list[j]->valid)
1334 {
1335 /* explicit ciphersuite found; its protocol version
1336 * does not become part of the search pattern!*/
1337
1338 cipher_id = ca_list[j]->id;
1339 }
1340 else
1341 {
1342 /* not an explicit ciphersuite; only in this case, the
1343 * protocol version is considered part of the search pattern */
1344
1345 if (ca_list[j]->algorithm_ssl)
1346 {
1347 if (alg_ssl)
1348 {
1349 alg_ssl &= ca_list[j]->algorithm_ssl;
1350 if (!alg_ssl) { found = 0; break; }
1351 }
1352 else
1353 alg_ssl = ca_list[j]->algorithm_ssl;
1354 }
1355 }
1356
1357 if (!multi) break;
1358 }
1359
1360 /*
1361 * Ok, we have the rule, now apply it
1362 */
1363 if (rule == CIPHER_SPECIAL)
1364 { /* special command */
1365 ok = 0;
1366 if ((buflen == 8) &&
1367 !strncmp(buf, "STRENGTH", 8))
1368 ok = ssl_cipher_strength_sort(head_p, tail_p);
1369 else
1370 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
1371 SSL_R_INVALID_COMMAND);
1372 if (ok == 0)
1373 retval = 0;
1374 /*
1375 * We do not support any "multi" options
1376 * together with "@", so throw away the
1377 * rest of the command, if any left, until
1378 * end or ':' is found.
1379 */
1380 while ((*l != '\0') && !ITEM_SEP(*l))
1381 l++;
1382 }
1383 else if (found)
1384 {
1385 ssl_cipher_apply_rule(cipher_id,
1386 alg_mkey, alg_auth, alg_enc, alg_mac, alg_ssl, algo_strength,
1387 rule, -1, head_p, tail_p);
1388 }
1389 else
1390 {
1391 while ((*l != '\0') && !ITEM_SEP(*l))
1392 l++;
1393 }
1394 if (*l == '\0') break; /* done */
1395 }
1396
1397 return(retval);
1398 }
1399 #ifndef OPENSSL_NO_EC
1400 static int check_suiteb_cipher_list(const SSL_METHOD *meth, CERT *c,
1401 const char **prule_str)
1402 {
1403 unsigned int suiteb_flags = 0, suiteb_comb2 = 0;
1404 if (!strcmp(*prule_str, "SUITEB128"))
1405 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1406 else if (!strcmp(*prule_str, "SUITEB128ONLY"))
1407 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS_ONLY;
1408 else if (!strcmp(*prule_str, "SUITEB128C2"))
1409 {
1410 suiteb_comb2 = 1;
1411 suiteb_flags = SSL_CERT_FLAG_SUITEB_128_LOS;
1412 }
1413 else if (!strcmp(*prule_str, "SUITEB192"))
1414 suiteb_flags = SSL_CERT_FLAG_SUITEB_192_LOS;
1415
1416 if (suiteb_flags)
1417 {
1418 c->cert_flags &= ~SSL_CERT_FLAG_SUITEB_128_LOS;
1419 c->cert_flags |= suiteb_flags;
1420 }
1421 else
1422 suiteb_flags = c->cert_flags & SSL_CERT_FLAG_SUITEB_128_LOS;
1423
1424 if (!suiteb_flags)
1425 return 1;
1426 /* Check version: if TLS 1.2 ciphers allowed we can use Suite B */
1427
1428 if (!(meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_TLS1_2_CIPHERS))
1429 {
1430 if (meth->ssl3_enc->enc_flags & SSL_ENC_FLAG_DTLS)
1431 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1432 SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE);
1433 else
1434 SSLerr(SSL_F_CHECK_SUITEB_CIPHER_LIST,
1435 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
1436 return 0;
1437 }
1438
1439 switch(suiteb_flags)
1440 {
1441 case SSL_CERT_FLAG_SUITEB_128_LOS:
1442 if (suiteb_comb2)
1443 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1444 else
1445 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384";
1446 break;
1447 case SSL_CERT_FLAG_SUITEB_128_LOS_ONLY:
1448 *prule_str = "ECDHE-ECDSA-AES128-GCM-SHA256";
1449 break;
1450 case SSL_CERT_FLAG_SUITEB_192_LOS:
1451 *prule_str = "ECDHE-ECDSA-AES256-GCM-SHA384";
1452 break;
1453 }
1454 /* Set auto ECDH parameter determination */
1455 c->ecdh_tmp_auto = 1;
1456 return 1;
1457 }
1458 #endif
1459
1460
1461 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
1462 STACK_OF(SSL_CIPHER) **cipher_list,
1463 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
1464 const char *rule_str, CERT *c)
1465 {
1466 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
1467 unsigned long disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl;
1468 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
1469 const char *rule_p;
1470 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
1471 const SSL_CIPHER **ca_list = NULL;
1472
1473 /*
1474 * Return with error if nothing to do.
1475 */
1476 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
1477 return NULL;
1478 #ifndef OPENSSL_NO_EC
1479 if (!check_suiteb_cipher_list(ssl_method, c, &rule_str))
1480 return NULL;
1481 #endif
1482
1483 /*
1484 * To reduce the work to do we only want to process the compiled
1485 * in algorithms, so we first get the mask of disabled ciphers.
1486 */
1487 ssl_cipher_get_disabled(&disabled_mkey, &disabled_auth, &disabled_enc, &disabled_mac, &disabled_ssl);
1488
1489 /*
1490 * Now we have to collect the available ciphers from the compiled
1491 * in ciphers. We cannot get more than the number compiled in, so
1492 * it is used for allocation.
1493 */
1494 num_of_ciphers = ssl_method->num_ciphers();
1495 #ifdef KSSL_DEBUG
1496 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1497 #endif /* KSSL_DEBUG */
1498 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1499 if (co_list == NULL)
1500 {
1501 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1502 return(NULL); /* Failure */
1503 }
1504
1505 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers,
1506 disabled_mkey, disabled_auth, disabled_enc, disabled_mac, disabled_ssl,
1507 co_list, &head, &tail);
1508
1509
1510 /* Now arrange all ciphers by preference: */
1511
1512 /* Everything else being equal, prefer ephemeral ECDH over other key exchange mechanisms */
1513 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1514 ssl_cipher_apply_rule(0, SSL_kEECDH, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1515
1516 /* AES is our preferred symmetric cipher */
1517 ssl_cipher_apply_rule(0, 0, 0, SSL_AES, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1518
1519 /* Temporarily enable everything else for sorting */
1520 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_ADD, -1, &head, &tail);
1521
1522 /* Low priority for MD5 */
1523 ssl_cipher_apply_rule(0, 0, 0, 0, SSL_MD5, 0, 0, CIPHER_ORD, -1, &head, &tail);
1524
1525 /* Move anonymous ciphers to the end. Usually, these will remain disabled.
1526 * (For applications that allow them, they aren't too bad, but we prefer
1527 * authenticated ciphers.) */
1528 ssl_cipher_apply_rule(0, 0, SSL_aNULL, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1529
1530 /* Move ciphers without forward secrecy to the end */
1531 ssl_cipher_apply_rule(0, 0, SSL_aECDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1532 /* ssl_cipher_apply_rule(0, 0, SSL_aDH, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail); */
1533 ssl_cipher_apply_rule(0, SSL_kRSA, 0, 0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1534 ssl_cipher_apply_rule(0, SSL_kPSK, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1535 ssl_cipher_apply_rule(0, SSL_kKRB5, 0,0, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1536
1537 /* RC4 is sort-of broken -- move the the end */
1538 ssl_cipher_apply_rule(0, 0, 0, SSL_RC4, 0, 0, 0, CIPHER_ORD, -1, &head, &tail);
1539
1540 /* Now sort by symmetric encryption strength. The above ordering remains
1541 * in force within each class */
1542 if (!ssl_cipher_strength_sort(&head, &tail))
1543 {
1544 OPENSSL_free(co_list);
1545 return NULL;
1546 }
1547
1548 /* Now disable everything (maintaining the ordering!) */
1549 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, 0, CIPHER_DEL, -1, &head, &tail);
1550
1551
1552 /*
1553 * We also need cipher aliases for selecting based on the rule_str.
1554 * There might be two types of entries in the rule_str: 1) names
1555 * of ciphers themselves 2) aliases for groups of ciphers.
1556 * For 1) we need the available ciphers and for 2) the cipher
1557 * groups of cipher_aliases added together in one list (otherwise
1558 * we would be happy with just the cipher_aliases table).
1559 */
1560 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1561 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1562 ca_list = OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
1563 if (ca_list == NULL)
1564 {
1565 OPENSSL_free(co_list);
1566 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
1567 return(NULL); /* Failure */
1568 }
1569 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1570 disabled_mkey, disabled_auth, disabled_enc,
1571 disabled_mac, disabled_ssl, head);
1572
1573 /*
1574 * If the rule_string begins with DEFAULT, apply the default rule
1575 * before using the (possibly available) additional rules.
1576 */
1577 ok = 1;
1578 rule_p = rule_str;
1579 if (strncmp(rule_str,"DEFAULT",7) == 0)
1580 {
1581 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1582 &head, &tail, ca_list);
1583 rule_p += 7;
1584 if (*rule_p == ':')
1585 rule_p++;
1586 }
1587
1588 if (ok && (strlen(rule_p) > 0))
1589 ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list);
1590
1591 OPENSSL_free((void *)ca_list); /* Not needed anymore */
1592
1593 if (!ok)
1594 { /* Rule processing failure */
1595 OPENSSL_free(co_list);
1596 return(NULL);
1597 }
1598
1599 /*
1600 * Allocate new "cipherstack" for the result, return with error
1601 * if we cannot get one.
1602 */
1603 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
1604 {
1605 OPENSSL_free(co_list);
1606 return(NULL);
1607 }
1608
1609 /*
1610 * The cipher selection for the list is done. The ciphers are added
1611 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1612 */
1613 for (curr = head; curr != NULL; curr = curr->next)
1614 {
1615 #ifdef OPENSSL_FIPS
1616 if (curr->active && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1617 #else
1618 if (curr->active)
1619 #endif
1620 {
1621 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1622 #ifdef CIPHER_DEBUG
1623 printf("<%s>\n",curr->cipher->name);
1624 #endif
1625 }
1626 }
1627 OPENSSL_free(co_list); /* Not needed any longer */
1628
1629 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1630 if (tmp_cipher_list == NULL)
1631 {
1632 sk_SSL_CIPHER_free(cipherstack);
1633 return NULL;
1634 }
1635 if (*cipher_list != NULL)
1636 sk_SSL_CIPHER_free(*cipher_list);
1637 *cipher_list = cipherstack;
1638 if (*cipher_list_by_id != NULL)
1639 sk_SSL_CIPHER_free(*cipher_list_by_id);
1640 *cipher_list_by_id = tmp_cipher_list;
1641 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1642
1643 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1644 return(cipherstack);
1645 }
1646
1647 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1648 {
1649 int is_export,pkl,kl;
1650 const char *ver,*exp_str;
1651 const char *kx,*au,*enc,*mac;
1652 unsigned long alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl,alg2;
1653 #ifdef KSSL_DEBUG
1654 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx/%lx/%lx/%lx/%lx\n";
1655 #else
1656 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1657 #endif /* KSSL_DEBUG */
1658
1659 alg_mkey = cipher->algorithm_mkey;
1660 alg_auth = cipher->algorithm_auth;
1661 alg_enc = cipher->algorithm_enc;
1662 alg_mac = cipher->algorithm_mac;
1663 alg_ssl = cipher->algorithm_ssl;
1664
1665 alg2=cipher->algorithm2;
1666
1667 is_export=SSL_C_IS_EXPORT(cipher);
1668 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1669 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1670 exp_str=is_export?" export":"";
1671
1672 if (alg_ssl & SSL_SSLV2)
1673 ver="SSLv2";
1674 else if (alg_ssl & SSL_SSLV3)
1675 ver="SSLv3";
1676 else if (alg_ssl & SSL_TLSV1_2)
1677 ver="TLSv1.2";
1678 else
1679 ver="unknown";
1680
1681 switch (alg_mkey)
1682 {
1683 case SSL_kRSA:
1684 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1685 break;
1686 case SSL_kDHr:
1687 kx="DH/RSA";
1688 break;
1689 case SSL_kDHd:
1690 kx="DH/DSS";
1691 break;
1692 case SSL_kKRB5:
1693 kx="KRB5";
1694 break;
1695 case SSL_kEDH:
1696 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1697 break;
1698 case SSL_kECDHr:
1699 kx="ECDH/RSA";
1700 break;
1701 case SSL_kECDHe:
1702 kx="ECDH/ECDSA";
1703 break;
1704 case SSL_kEECDH:
1705 kx="ECDH";
1706 break;
1707 case SSL_kPSK:
1708 kx="PSK";
1709 break;
1710 case SSL_kSRP:
1711 kx="SRP";
1712 break;
1713 default:
1714 kx="unknown";
1715 }
1716
1717 switch (alg_auth)
1718 {
1719 case SSL_aRSA:
1720 au="RSA";
1721 break;
1722 case SSL_aDSS:
1723 au="DSS";
1724 break;
1725 case SSL_aDH:
1726 au="DH";
1727 break;
1728 case SSL_aKRB5:
1729 au="KRB5";
1730 break;
1731 case SSL_aECDH:
1732 au="ECDH";
1733 break;
1734 case SSL_aNULL:
1735 au="None";
1736 break;
1737 case SSL_aECDSA:
1738 au="ECDSA";
1739 break;
1740 case SSL_aPSK:
1741 au="PSK";
1742 break;
1743 default:
1744 au="unknown";
1745 break;
1746 }
1747
1748 switch (alg_enc)
1749 {
1750 case SSL_DES:
1751 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1752 break;
1753 case SSL_3DES:
1754 enc="3DES(168)";
1755 break;
1756 case SSL_RC4:
1757 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1758 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1759 break;
1760 case SSL_RC2:
1761 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1762 break;
1763 case SSL_IDEA:
1764 enc="IDEA(128)";
1765 break;
1766 case SSL_eNULL:
1767 enc="None";
1768 break;
1769 case SSL_AES128:
1770 enc="AES(128)";
1771 break;
1772 case SSL_AES256:
1773 enc="AES(256)";
1774 break;
1775 case SSL_AES128GCM:
1776 enc="AESGCM(128)";
1777 break;
1778 case SSL_AES256GCM:
1779 enc="AESGCM(256)";
1780 break;
1781 case SSL_CAMELLIA128:
1782 enc="Camellia(128)";
1783 break;
1784 case SSL_CAMELLIA256:
1785 enc="Camellia(256)";
1786 break;
1787 case SSL_SEED:
1788 enc="SEED(128)";
1789 break;
1790 case SSL_CHACHA20POLY1305:
1791 enc="ChaCha20-Poly1305";
1792 break;
1793 default:
1794 enc="unknown";
1795 break;
1796 }
1797
1798 switch (alg_mac)
1799 {
1800 case SSL_MD5:
1801 mac="MD5";
1802 break;
1803 case SSL_SHA1:
1804 mac="SHA1";
1805 break;
1806 case SSL_SHA256:
1807 mac="SHA256";
1808 break;
1809 case SSL_SHA384:
1810 mac="SHA384";
1811 break;
1812 case SSL_AEAD:
1813 mac="AEAD";
1814 break;
1815 default:
1816 mac="unknown";
1817 break;
1818 }
1819
1820 if (buf == NULL)
1821 {
1822 len=128;
1823 buf=OPENSSL_malloc(len);
1824 if (buf == NULL) return("OPENSSL_malloc Error");
1825 }
1826 else if (len < 128)
1827 return("Buffer too small");
1828
1829 #ifdef KSSL_DEBUG
1830 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg_mkey,alg_auth,alg_enc,alg_mac,alg_ssl);
1831 #else
1832 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1833 #endif /* KSSL_DEBUG */
1834 return(buf);
1835 }
1836
1837 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1838 {
1839 int i;
1840
1841 if (c == NULL) return("(NONE)");
1842 i=(int)(c->id>>24L);
1843 if (i == 3)
1844 return("TLSv1/SSLv3");
1845 else if (i == 2)
1846 return("SSLv2");
1847 else
1848 return("unknown");
1849 }
1850
1851 /* return the actual cipher being used */
1852 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1853 {
1854 if (c != NULL)
1855 return(c->name);
1856 return("(NONE)");
1857 }
1858
1859 /* number of bits for symmetric cipher */
1860 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1861 {
1862 int ret=0;
1863
1864 if (c != NULL)
1865 {
1866 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1867 ret = c->strength_bits;
1868 }
1869 return(ret);
1870 }
1871
1872 unsigned long SSL_CIPHER_get_id(const SSL_CIPHER *c)
1873 {
1874 return c->id;
1875 }
1876
1877 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1878 {
1879 SSL_COMP *ctmp;
1880 int i,nn;
1881
1882 if ((n == 0) || (sk == NULL)) return(NULL);
1883 nn=sk_SSL_COMP_num(sk);
1884 for (i=0; i<nn; i++)
1885 {
1886 ctmp=sk_SSL_COMP_value(sk,i);
1887 if (ctmp->id == n)
1888 return(ctmp);
1889 }
1890 return(NULL);
1891 }
1892
1893 #ifdef OPENSSL_NO_COMP
1894 void *SSL_COMP_get_compression_methods(void)
1895 {
1896 return NULL;
1897 }
1898 int SSL_COMP_add_compression_method(int id, void *cm)
1899 {
1900 return 1;
1901 }
1902
1903 const char *SSL_COMP_get_name(const void *comp)
1904 {
1905 return NULL;
1906 }
1907 #else
1908 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1909 {
1910 load_builtin_compressions();
1911 return(ssl_comp_methods);
1912 }
1913
1914 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1915 {
1916 SSL_COMP *comp;
1917
1918 if (cm == NULL || cm->type == NID_undef)
1919 return 1;
1920
1921 /* According to draft-ietf-tls-compression-04.txt, the
1922 compression number ranges should be the following:
1923
1924 0 to 63: methods defined by the IETF
1925 64 to 192: external party methods assigned by IANA
1926 193 to 255: reserved for private use */
1927 if (id < 193 || id > 255)
1928 {
1929 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1930 return 0;
1931 }
1932
1933 MemCheck_off();
1934 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1935 comp->id=id;
1936 comp->method=cm;
1937 load_builtin_compressions();
1938 if (ssl_comp_methods
1939 && sk_SSL_COMP_find(ssl_comp_methods,comp) >= 0)
1940 {
1941 OPENSSL_free(comp);
1942 MemCheck_on();
1943 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1944 return(1);
1945 }
1946 else if ((ssl_comp_methods == NULL)
1947 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1948 {
1949 OPENSSL_free(comp);
1950 MemCheck_on();
1951 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1952 return(1);
1953 }
1954 else
1955 {
1956 MemCheck_on();
1957 return(0);
1958 }
1959 }
1960
1961 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1962 {
1963 if (comp)
1964 return comp->name;
1965 return NULL;
1966 }
1967 #endif
1968 /* For a cipher return the index corresponding to the certificate type */
1969 int ssl_cipher_get_cert_index(const SSL_CIPHER *c)
1970 {
1971 unsigned long alg_k, alg_a;
1972
1973 alg_k = c->algorithm_mkey;
1974 alg_a = c->algorithm_auth;
1975
1976 if (alg_k & (SSL_kECDHr|SSL_kECDHe))
1977 {
1978 /* we don't need to look at SSL_kEECDH
1979 * since no certificate is needed for
1980 * anon ECDH and for authenticated
1981 * EECDH, the check for the auth
1982 * algorithm will set i correctly
1983 * NOTE: For ECDH-RSA, we need an ECC
1984 * not an RSA cert but for EECDH-RSA
1985 * we need an RSA cert. Placing the
1986 * checks for SSL_kECDH before RSA
1987 * checks ensures the correct cert is chosen.
1988 */
1989 return SSL_PKEY_ECC;
1990 }
1991 else if (alg_a & SSL_aECDSA)
1992 return SSL_PKEY_ECC;
1993 else if (alg_k & SSL_kDHr)
1994 return SSL_PKEY_DH_RSA;
1995 else if (alg_k & SSL_kDHd)
1996 return SSL_PKEY_DH_DSA;
1997 else if (alg_a & SSL_aDSS)
1998 return SSL_PKEY_DSA_SIGN;
1999 else if (alg_a & SSL_aRSA)
2000 return SSL_PKEY_RSA_ENC;
2001 else if (alg_a & SSL_aKRB5)
2002 /* VRS something else here? */
2003 return -1;
2004 else if (alg_a & SSL_aGOST94)
2005 return SSL_PKEY_GOST94;
2006 else if (alg_a & SSL_aGOST01)
2007 return SSL_PKEY_GOST01;
2008 return -1;
2009 }
2010
2011 const SSL_CIPHER *ssl_get_cipher_by_char(SSL *ssl, const unsigned char *ptr)
2012 {
2013 const SSL_CIPHER *c;
2014 c = ssl->method->get_cipher_by_char(ptr);
2015 if (c == NULL || c->valid == 0)
2016 return NULL;
2017 return c;
2018 }
2019
2020 const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr)
2021 {
2022 return ssl->method->get_cipher_by_char(ptr);
2023 }
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