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