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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) 1998-2006 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 "ssl_locl.h" | |
147 | ||
148 | #define SSL_ENC_DES_IDX 0 | |
149 | #define SSL_ENC_3DES_IDX 1 | |
150 | #define SSL_ENC_RC4_IDX 2 | |
151 | #define SSL_ENC_RC2_IDX 3 | |
152 | #define SSL_ENC_IDEA_IDX 4 | |
153 | #define SSL_ENC_NULL_IDX 5 | |
154 | #define SSL_ENC_AES128_IDX 6 | |
155 | #define SSL_ENC_AES256_IDX 7 | |
156 | #define SSL_ENC_CAMELLIA128_IDX 8 | |
157 | #define SSL_ENC_CAMELLIA256_IDX 9 | |
158 | #define SSL_ENC_NUM_IDX 10 | |
159 | ||
160 | ||
161 | static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ | |
162 | NULL,NULL,NULL,NULL,NULL,NULL, | |
163 | }; | |
164 | ||
165 | #define SSL_COMP_NULL_IDX 0 | |
166 | #define SSL_COMP_ZLIB_IDX 1 | |
167 | #define SSL_COMP_NUM_IDX 2 | |
168 | ||
169 | static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL; | |
170 | ||
171 | #define SSL_MD_MD5_IDX 0 | |
172 | #define SSL_MD_SHA1_IDX 1 | |
173 | #define SSL_MD_NUM_IDX 2 | |
174 | static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={ | |
175 | NULL,NULL, | |
176 | }; | |
177 | ||
178 | #define CIPHER_ADD 1 | |
179 | #define CIPHER_KILL 2 | |
180 | #define CIPHER_DEL 3 | |
181 | #define CIPHER_ORD 4 | |
182 | #define CIPHER_SPECIAL 5 | |
183 | ||
184 | typedef struct cipher_order_st | |
185 | { | |
186 | SSL_CIPHER *cipher; | |
187 | int active; | |
188 | int dead; | |
189 | struct cipher_order_st *next,*prev; | |
190 | } CIPHER_ORDER; | |
191 | ||
192 | static const SSL_CIPHER cipher_aliases[]={ | |
193 | /* "ALL" doesn't include eNULL (must be specifically enabled) */ | |
194 | {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, | |
195 | /* "COMPLEMENTOFALL" */ | |
196 | {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, | |
197 | ||
198 | /* "COMPLEMENTOFDEFAULT" (does *not* include ciphersuites not found in ALL!) */ | |
199 | {0,SSL_TXT_CMPDEF,0,SSL_ADH|SSL_AECDH|(SSL_ENC_MASK & ~SSL_eNULL), 0,0,0,0,SSL_AUTH_MASK|SSL_ENC_MASK,0}, | |
200 | ||
201 | /* Single key exchange bits | |
202 | * (some of these are multiple key exchange algs according to the RFCs, | |
203 | * e.g. kEDH combines DHE_DSS and DHE_RSA) */ | |
204 | {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0}, | |
205 | {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0}, /* no such ciphersuites supported! */ | |
206 | {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0}, /* no such ciphersuites supported! */ | |
207 | {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0}, | |
208 | {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, | |
209 | {0,SSL_TXT_kECDHr,0,SSL_kECDHr,0,0,0,0,SSL_MKEY_MASK,0}, | |
210 | {0,SSL_TXT_kECDHe,0,SSL_kECDHe,0,0,0,0,SSL_MKEY_MASK,0}, | |
211 | {0,SSL_TXT_kEECDH,0,SSL_kEECDH,0,0,0,0,SSL_MKEY_MASK,0}, | |
212 | {0,SSL_TXT_kPSK,0,SSL_kPSK, 0,0,0,0,SSL_MKEY_MASK,0}, | |
213 | ||
214 | /* More key exchange aliases (combined bits) */ | |
215 | {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0}, | |
216 | {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0}, | |
217 | {0,SSL_TXT_kECDH,0,SSL_kECDH,0,0,0,0,SSL_MKEY_MASK,0}, | |
218 | {0,SSL_TXT_ECDH,0,SSL_ECDH, 0,0,0,0,SSL_MKEY_MASK,0}, | |
219 | {0,SSL_TXT_EECDH,0,SSL_EECDH,0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0}, | |
220 | ||
221 | /* Single authentication bits */ | |
222 | {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0}, | |
223 | {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0}, | |
224 | {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, | |
225 | {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0}, | |
226 | {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0}, /* no such ciphersuites supported! */ | |
227 | {0,SSL_TXT_aECDH, 0,SSL_aECDH,0,0,0,0,SSL_AUTH_MASK,0}, | |
228 | {0,SSL_TXT_aECDSA, 0,SSL_aECDSA,0,0,0,0,SSL_AUTH_MASK,0}, | |
229 | {0,SSL_TXT_aPSK,0,SSL_aPSK, 0,0,0,0,SSL_AUTH_MASK,0}, | |
230 | ||
231 | /* More authentication aliases */ | |
232 | {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0}, | |
233 | {0,SSL_TXT_ECDSA,0,SSL_ECDSA,0,0,0,0,SSL_AUTH_MASK,0}, | |
234 | ||
235 | /* Single encryption bits */ | |
236 | {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0}, | |
237 | {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0}, | |
238 | {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0}, | |
239 | {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0}, | |
240 | #ifndef OPENSSL_NO_IDEA | |
241 | {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0}, | |
242 | #endif | |
243 | {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, | |
244 | {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0}, | |
245 | {0,SSL_TXT_CAMELLIA, 0,SSL_CAMELLIA, 0,0,0,0,SSL_ENC_MASK,0}, | |
246 | ||
247 | /* Single MAC bits */ | |
248 | {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0}, | |
249 | {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0}, | |
250 | {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0}, | |
251 | ||
252 | /* More aliases */ | |
253 | {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0}, | |
254 | {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, | |
255 | {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, | |
256 | {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, | |
257 | {0,SSL_TXT_AECDH,0,SSL_AECDH,0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, | |
258 | {0,SSL_TXT_PSK, 0,SSL_PSK, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0}, | |
259 | ||
260 | {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0}, | |
261 | {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0}, | |
262 | {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0}, | |
263 | ||
264 | {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK}, | |
265 | {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK}, | |
266 | {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK}, | |
267 | {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK}, | |
268 | {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK}, | |
269 | {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK}, | |
270 | {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK}, | |
271 | }; | |
272 | ||
273 | void ssl_load_ciphers(void) | |
274 | { | |
275 | ssl_cipher_methods[SSL_ENC_DES_IDX]= | |
276 | EVP_get_cipherbyname(SN_des_cbc); | |
277 | ssl_cipher_methods[SSL_ENC_3DES_IDX]= | |
278 | EVP_get_cipherbyname(SN_des_ede3_cbc); | |
279 | ssl_cipher_methods[SSL_ENC_RC4_IDX]= | |
280 | EVP_get_cipherbyname(SN_rc4); | |
281 | ssl_cipher_methods[SSL_ENC_RC2_IDX]= | |
282 | EVP_get_cipherbyname(SN_rc2_cbc); | |
283 | #ifndef OPENSSL_NO_IDEA | |
284 | ssl_cipher_methods[SSL_ENC_IDEA_IDX]= | |
285 | EVP_get_cipherbyname(SN_idea_cbc); | |
286 | #else | |
287 | ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL; | |
288 | #endif | |
289 | ssl_cipher_methods[SSL_ENC_AES128_IDX]= | |
290 | EVP_get_cipherbyname(SN_aes_128_cbc); | |
291 | ssl_cipher_methods[SSL_ENC_AES256_IDX]= | |
292 | EVP_get_cipherbyname(SN_aes_256_cbc); | |
293 | ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]= | |
294 | EVP_get_cipherbyname(SN_camellia_128_cbc); | |
295 | ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]= | |
296 | EVP_get_cipherbyname(SN_camellia_256_cbc); | |
297 | ||
298 | ssl_digest_methods[SSL_MD_MD5_IDX]= | |
299 | EVP_get_digestbyname(SN_md5); | |
300 | ssl_digest_methods[SSL_MD_SHA1_IDX]= | |
301 | EVP_get_digestbyname(SN_sha1); | |
302 | } | |
303 | ||
304 | ||
305 | #ifndef OPENSSL_NO_COMP | |
306 | ||
307 | static int sk_comp_cmp(const SSL_COMP * const *a, | |
308 | const SSL_COMP * const *b) | |
309 | { | |
310 | return((*a)->id-(*b)->id); | |
311 | } | |
312 | ||
313 | static void load_builtin_compressions(void) | |
314 | { | |
315 | int got_write_lock = 0; | |
316 | ||
317 | CRYPTO_r_lock(CRYPTO_LOCK_SSL); | |
318 | if (ssl_comp_methods == NULL) | |
319 | { | |
320 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL); | |
321 | CRYPTO_w_lock(CRYPTO_LOCK_SSL); | |
322 | got_write_lock = 1; | |
323 | ||
324 | if (ssl_comp_methods == NULL) | |
325 | { | |
326 | SSL_COMP *comp = NULL; | |
327 | ||
328 | MemCheck_off(); | |
329 | ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp); | |
330 | if (ssl_comp_methods != NULL) | |
331 | { | |
332 | comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); | |
333 | if (comp != NULL) | |
334 | { | |
335 | comp->method=COMP_zlib(); | |
336 | if (comp->method | |
337 | && comp->method->type == NID_undef) | |
338 | OPENSSL_free(comp); | |
339 | else | |
340 | { | |
341 | comp->id=SSL_COMP_ZLIB_IDX; | |
342 | comp->name=comp->method->name; | |
343 | sk_SSL_COMP_push(ssl_comp_methods,comp); | |
344 | } | |
345 | } | |
346 | } | |
347 | MemCheck_on(); | |
348 | } | |
349 | } | |
350 | ||
351 | if (got_write_lock) | |
352 | CRYPTO_w_unlock(CRYPTO_LOCK_SSL); | |
353 | else | |
354 | CRYPTO_r_unlock(CRYPTO_LOCK_SSL); | |
355 | } | |
356 | #endif | |
357 | ||
358 | int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc, | |
359 | const EVP_MD **md, SSL_COMP **comp) | |
360 | { | |
361 | int i; | |
362 | SSL_CIPHER *c; | |
363 | ||
364 | c=s->cipher; | |
365 | if (c == NULL) return(0); | |
366 | if (comp != NULL) | |
367 | { | |
368 | SSL_COMP ctmp; | |
369 | #ifndef OPENSSL_NO_COMP | |
370 | load_builtin_compressions(); | |
371 | #endif | |
372 | ||
373 | *comp=NULL; | |
374 | ctmp.id=s->compress_meth; | |
375 | if (ssl_comp_methods != NULL) | |
376 | { | |
377 | i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp); | |
378 | if (i >= 0) | |
379 | *comp=sk_SSL_COMP_value(ssl_comp_methods,i); | |
380 | else | |
381 | *comp=NULL; | |
382 | } | |
383 | } | |
384 | ||
385 | if ((enc == NULL) || (md == NULL)) return(0); | |
386 | ||
387 | switch (c->algorithms & SSL_ENC_MASK) | |
388 | { | |
389 | case SSL_DES: | |
390 | i=SSL_ENC_DES_IDX; | |
391 | break; | |
392 | case SSL_3DES: | |
393 | i=SSL_ENC_3DES_IDX; | |
394 | break; | |
395 | case SSL_RC4: | |
396 | i=SSL_ENC_RC4_IDX; | |
397 | break; | |
398 | case SSL_RC2: | |
399 | i=SSL_ENC_RC2_IDX; | |
400 | break; | |
401 | case SSL_IDEA: | |
402 | i=SSL_ENC_IDEA_IDX; | |
403 | break; | |
404 | case SSL_eNULL: | |
405 | i=SSL_ENC_NULL_IDX; | |
406 | break; | |
407 | case SSL_AES: | |
408 | switch(c->alg_bits) | |
409 | { | |
410 | case 128: i=SSL_ENC_AES128_IDX; break; | |
411 | case 256: i=SSL_ENC_AES256_IDX; break; | |
412 | default: i=-1; break; | |
413 | } | |
414 | break; | |
415 | case SSL_CAMELLIA: | |
416 | switch(c->alg_bits) | |
417 | { | |
418 | case 128: i=SSL_ENC_CAMELLIA128_IDX; break; | |
419 | case 256: i=SSL_ENC_CAMELLIA256_IDX; break; | |
420 | default: i=-1; break; | |
421 | } | |
422 | break; | |
423 | ||
424 | default: | |
425 | i= -1; | |
426 | break; | |
427 | } | |
428 | ||
429 | if ((i < 0) || (i > SSL_ENC_NUM_IDX)) | |
430 | *enc=NULL; | |
431 | else | |
432 | { | |
433 | if (i == SSL_ENC_NULL_IDX) | |
434 | *enc=EVP_enc_null(); | |
435 | else | |
436 | *enc=ssl_cipher_methods[i]; | |
437 | } | |
438 | ||
439 | switch (c->algorithms & SSL_MAC_MASK) | |
440 | { | |
441 | case SSL_MD5: | |
442 | i=SSL_MD_MD5_IDX; | |
443 | break; | |
444 | case SSL_SHA1: | |
445 | i=SSL_MD_SHA1_IDX; | |
446 | break; | |
447 | default: | |
448 | i= -1; | |
449 | break; | |
450 | } | |
451 | if ((i < 0) || (i > SSL_MD_NUM_IDX)) | |
452 | *md=NULL; | |
453 | else | |
454 | *md=ssl_digest_methods[i]; | |
455 | ||
456 | if ((*enc != NULL) && (*md != NULL)) | |
457 | return(1); | |
458 | else | |
459 | return(0); | |
460 | } | |
461 | ||
462 | #define ITEM_SEP(a) \ | |
463 | (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ',')) | |
464 | ||
465 | static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr, | |
466 | CIPHER_ORDER **tail) | |
467 | { | |
468 | if (curr == *tail) return; | |
469 | if (curr == *head) | |
470 | *head=curr->next; | |
471 | if (curr->prev != NULL) | |
472 | curr->prev->next=curr->next; | |
473 | if (curr->next != NULL) /* should always be true */ | |
474 | curr->next->prev=curr->prev; | |
475 | (*tail)->next=curr; | |
476 | curr->prev= *tail; | |
477 | curr->next=NULL; | |
478 | *tail=curr; | |
479 | } | |
480 | ||
481 | static unsigned long ssl_cipher_get_disabled(void) | |
482 | { | |
483 | unsigned long mask = 0; | |
484 | ||
485 | #ifdef OPENSSL_NO_RSA | |
486 | mask |= SSL_aRSA|SSL_kRSA; | |
487 | #endif | |
488 | #ifdef OPENSSL_NO_DSA | |
489 | mask |= SSL_aDSS; | |
490 | #endif | |
491 | #ifdef OPENSSL_NO_DH | |
492 | mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH; | |
493 | #endif | |
494 | #ifdef OPENSSL_NO_KRB5 | |
495 | mask |= SSL_kKRB5|SSL_aKRB5; | |
496 | #endif | |
497 | #ifdef OPENSSL_NO_ECDSA | |
498 | mask |= SSL_aECDSA; | |
499 | #endif | |
500 | #ifdef OPENSSL_NO_ECDH | |
501 | mask |= SSL_kECDHe|SSL_kECDHr|SSL_kECDHE|SSL_aECDH; | |
502 | #endif | |
503 | #ifdef OPENSSL_NO_PSK | |
504 | mask |= SSL_kPSK; | |
505 | #endif | |
506 | #ifdef SSL_FORBID_ENULL | |
507 | mask |= SSL_eNULL; | |
508 | #endif | |
509 | ||
510 | mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0; | |
511 | mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0; | |
512 | mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0; | |
513 | mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0; | |
514 | mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0; | |
515 | mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0; | |
516 | mask |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA:0; | |
517 | ||
518 | mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0; | |
519 | mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0; | |
520 | ||
521 | return(mask); | |
522 | } | |
523 | ||
524 | static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method, | |
525 | int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list, | |
526 | CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) | |
527 | { | |
528 | int i, co_list_num; | |
529 | SSL_CIPHER *c; | |
530 | ||
531 | /* | |
532 | * We have num_of_ciphers descriptions compiled in, depending on the | |
533 | * method selected (SSLv2 and/or SSLv3, TLSv1 etc). | |
534 | * These will later be sorted in a linked list with at most num | |
535 | * entries. | |
536 | */ | |
537 | ||
538 | /* Get the initial list of ciphers */ | |
539 | co_list_num = 0; /* actual count of ciphers */ | |
540 | for (i = 0; i < num_of_ciphers; i++) | |
541 | { | |
542 | c = ssl_method->get_cipher(i); | |
543 | /* drop those that use any of that is not available */ | |
544 | if ((c != NULL) && c->valid && !(c->algorithms & mask)) | |
545 | { | |
546 | co_list[co_list_num].cipher = c; | |
547 | co_list[co_list_num].next = NULL; | |
548 | co_list[co_list_num].prev = NULL; | |
549 | co_list[co_list_num].active = 0; | |
550 | co_list_num++; | |
551 | #ifdef KSSL_DEBUG | |
552 | printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms); | |
553 | #endif /* KSSL_DEBUG */ | |
554 | /* | |
555 | if (!sk_push(ca_list,(char *)c)) goto err; | |
556 | */ | |
557 | } | |
558 | } | |
559 | ||
560 | /* | |
561 | * Prepare linked list from list entries | |
562 | */ | |
563 | for (i = 1; i < co_list_num - 1; i++) | |
564 | { | |
565 | co_list[i].prev = &(co_list[i-1]); | |
566 | co_list[i].next = &(co_list[i+1]); | |
567 | } | |
568 | if (co_list_num > 0) | |
569 | { | |
570 | (*head_p) = &(co_list[0]); | |
571 | (*head_p)->prev = NULL; | |
572 | (*head_p)->next = &(co_list[1]); | |
573 | (*tail_p) = &(co_list[co_list_num - 1]); | |
574 | (*tail_p)->prev = &(co_list[co_list_num - 2]); | |
575 | (*tail_p)->next = NULL; | |
576 | } | |
577 | } | |
578 | ||
579 | static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list, | |
580 | int num_of_group_aliases, unsigned long mask, | |
581 | CIPHER_ORDER *head) | |
582 | { | |
583 | CIPHER_ORDER *ciph_curr; | |
584 | SSL_CIPHER **ca_curr; | |
585 | int i; | |
586 | unsigned long enabled_mask = ~mask; | |
587 | ||
588 | /* | |
589 | * First, add the real ciphers as already collected | |
590 | */ | |
591 | ciph_curr = head; | |
592 | ca_curr = ca_list; | |
593 | while (ciph_curr != NULL) | |
594 | { | |
595 | *ca_curr = ciph_curr->cipher; | |
596 | ca_curr++; | |
597 | ciph_curr = ciph_curr->next; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Now we add the available ones from the cipher_aliases[] table. | |
602 | * They represent either one or more algorithms, some of which | |
603 | * in any affected category must be supported (set in enabled_mask), | |
604 | * or represent a cipher strength value (will be added in any case because algorithms=0). | |
605 | */ | |
606 | for (i = 0; i < num_of_group_aliases; i++) | |
607 | { | |
608 | int algorithms = cipher_aliases[i].algorithms; | |
609 | ||
610 | if (SSL_MKEY_MASK & algorithms) | |
611 | { | |
612 | if ((SSL_MKEY_MASK & algorithms & enabled_mask) == 0) | |
613 | continue; | |
614 | } | |
615 | ||
616 | if (SSL_AUTH_MASK & algorithms) | |
617 | { | |
618 | if ((SSL_AUTH_MASK & algorithms & enabled_mask) == 0) | |
619 | continue; | |
620 | } | |
621 | ||
622 | if (SSL_ENC_MASK & algorithms) | |
623 | { | |
624 | if ((SSL_ENC_MASK & algorithms & enabled_mask) == 0) | |
625 | continue; | |
626 | } | |
627 | ||
628 | if (SSL_MAC_MASK & algorithms) | |
629 | { | |
630 | if ((SSL_MAC_MASK & algorithms & enabled_mask) == 0) | |
631 | continue; | |
632 | } | |
633 | ||
634 | *ca_curr = (SSL_CIPHER *)(cipher_aliases + i); | |
635 | ca_curr++; | |
636 | } | |
637 | ||
638 | *ca_curr = NULL; /* end of list */ | |
639 | } | |
640 | ||
641 | static void ssl_cipher_apply_rule(unsigned long cipher_id, | |
642 | unsigned long algorithms, unsigned long mask, | |
643 | unsigned long algo_strength, unsigned long mask_strength, | |
644 | int rule, int strength_bits, | |
645 | CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p) | |
646 | { | |
647 | CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2; | |
648 | SSL_CIPHER *cp; | |
649 | unsigned long ma, ma_s; | |
650 | ||
651 | #ifdef CIPHER_DEBUG | |
652 | printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n", | |
653 | rule, algorithms, mask, algo_strength, mask_strength, | |
654 | strength_bits); | |
655 | #endif | |
656 | ||
657 | curr = head = *head_p; | |
658 | curr2 = head; | |
659 | tail2 = tail = *tail_p; | |
660 | for (;;) | |
661 | { | |
662 | if ((curr == NULL) || (curr == tail2)) break; | |
663 | curr = curr2; | |
664 | curr2 = curr->next; | |
665 | ||
666 | cp = curr->cipher; | |
667 | ||
668 | /* If explicit cipher suite match that one only */ | |
669 | ||
670 | if (cipher_id) | |
671 | { | |
672 | if (cp->id != cipher_id) | |
673 | continue; | |
674 | } | |
675 | ||
676 | /* | |
677 | * Selection criteria is either the number of strength_bits | |
678 | * or the algorithm used. | |
679 | */ | |
680 | else if (strength_bits == -1) | |
681 | { | |
682 | ma = mask & cp->algorithms; | |
683 | ma_s = mask_strength & cp->algo_strength; | |
684 | ||
685 | #ifdef CIPHER_DEBUG | |
686 | printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength); | |
687 | printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength); | |
688 | #endif | |
689 | /* | |
690 | * Select: if none of the mask bit was met from the | |
691 | * cipher or not all of the bits were met, the | |
692 | * selection does not apply. | |
693 | */ | |
694 | if (((ma == 0) && (ma_s == 0)) || | |
695 | ((ma & algorithms) != ma) || | |
696 | ((ma_s & algo_strength) != ma_s)) | |
697 | continue; /* does not apply */ | |
698 | } | |
699 | else if (strength_bits != cp->strength_bits) | |
700 | continue; /* does not apply */ | |
701 | ||
702 | #ifdef CIPHER_DEBUG | |
703 | printf("Action = %d\n", rule); | |
704 | #endif | |
705 | ||
706 | /* add the cipher if it has not been added yet. */ | |
707 | if (rule == CIPHER_ADD) | |
708 | { | |
709 | if (!curr->active) | |
710 | { | |
711 | ll_append_tail(&head, curr, &tail); | |
712 | curr->active = 1; | |
713 | } | |
714 | } | |
715 | /* Move the added cipher to this location */ | |
716 | else if (rule == CIPHER_ORD) | |
717 | { | |
718 | if (curr->active) | |
719 | { | |
720 | ll_append_tail(&head, curr, &tail); | |
721 | } | |
722 | } | |
723 | else if (rule == CIPHER_DEL) | |
724 | curr->active = 0; | |
725 | else if (rule == CIPHER_KILL) | |
726 | { | |
727 | if (head == curr) | |
728 | head = curr->next; | |
729 | else | |
730 | curr->prev->next = curr->next; | |
731 | if (tail == curr) | |
732 | tail = curr->prev; | |
733 | curr->active = 0; | |
734 | if (curr->next != NULL) | |
735 | curr->next->prev = curr->prev; | |
736 | if (curr->prev != NULL) | |
737 | curr->prev->next = curr->next; | |
738 | curr->next = NULL; | |
739 | curr->prev = NULL; | |
740 | } | |
741 | } | |
742 | ||
743 | *head_p = head; | |
744 | *tail_p = tail; | |
745 | } | |
746 | ||
747 | static int ssl_cipher_strength_sort(CIPHER_ORDER **head_p, | |
748 | CIPHER_ORDER **tail_p) | |
749 | { | |
750 | int max_strength_bits, i, *number_uses; | |
751 | CIPHER_ORDER *curr; | |
752 | ||
753 | /* | |
754 | * This routine sorts the ciphers with descending strength. The sorting | |
755 | * must keep the pre-sorted sequence, so we apply the normal sorting | |
756 | * routine as '+' movement to the end of the list. | |
757 | */ | |
758 | max_strength_bits = 0; | |
759 | curr = *head_p; | |
760 | while (curr != NULL) | |
761 | { | |
762 | if (curr->active && | |
763 | (curr->cipher->strength_bits > max_strength_bits)) | |
764 | max_strength_bits = curr->cipher->strength_bits; | |
765 | curr = curr->next; | |
766 | } | |
767 | ||
768 | number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int)); | |
769 | if (!number_uses) | |
770 | { | |
771 | SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE); | |
772 | return(0); | |
773 | } | |
774 | memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int)); | |
775 | ||
776 | /* | |
777 | * Now find the strength_bits values actually used | |
778 | */ | |
779 | curr = *head_p; | |
780 | while (curr != NULL) | |
781 | { | |
782 | if (curr->active) | |
783 | number_uses[curr->cipher->strength_bits]++; | |
784 | curr = curr->next; | |
785 | } | |
786 | /* | |
787 | * Go through the list of used strength_bits values in descending | |
788 | * order. | |
789 | */ | |
790 | for (i = max_strength_bits; i >= 0; i--) | |
791 | if (number_uses[i] > 0) | |
792 | ssl_cipher_apply_rule(0, 0, 0, 0, 0, CIPHER_ORD, i, | |
793 | head_p, tail_p); | |
794 | ||
795 | OPENSSL_free(number_uses); | |
796 | return(1); | |
797 | } | |
798 | ||
799 | static int ssl_cipher_process_rulestr(const char *rule_str, | |
800 | CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p, | |
801 | SSL_CIPHER **ca_list) | |
802 | { | |
803 | unsigned long algorithms, mask, algo_strength, mask_strength; | |
804 | const char *l, *start, *buf; | |
805 | int j, multi, found, rule, retval, ok, buflen; | |
806 | unsigned long cipher_id = 0; | |
807 | char ch; | |
808 | ||
809 | retval = 1; | |
810 | l = rule_str; | |
811 | for (;;) | |
812 | { | |
813 | ch = *l; | |
814 | ||
815 | if (ch == '\0') | |
816 | break; /* done */ | |
817 | if (ch == '-') | |
818 | { rule = CIPHER_DEL; l++; } | |
819 | else if (ch == '+') | |
820 | { rule = CIPHER_ORD; l++; } | |
821 | else if (ch == '!') | |
822 | { rule = CIPHER_KILL; l++; } | |
823 | else if (ch == '@') | |
824 | { rule = CIPHER_SPECIAL; l++; } | |
825 | else | |
826 | { rule = CIPHER_ADD; } | |
827 | ||
828 | if (ITEM_SEP(ch)) | |
829 | { | |
830 | l++; | |
831 | continue; | |
832 | } | |
833 | ||
834 | algorithms = mask = algo_strength = mask_strength = 0; | |
835 | ||
836 | start=l; | |
837 | for (;;) | |
838 | { | |
839 | ch = *l; | |
840 | buf = l; | |
841 | buflen = 0; | |
842 | #ifndef CHARSET_EBCDIC | |
843 | while ( ((ch >= 'A') && (ch <= 'Z')) || | |
844 | ((ch >= '0') && (ch <= '9')) || | |
845 | ((ch >= 'a') && (ch <= 'z')) || | |
846 | (ch == '-')) | |
847 | #else | |
848 | while ( isalnum(ch) || (ch == '-')) | |
849 | #endif | |
850 | { | |
851 | ch = *(++l); | |
852 | buflen++; | |
853 | } | |
854 | ||
855 | if (buflen == 0) | |
856 | { | |
857 | /* | |
858 | * We hit something we cannot deal with, | |
859 | * it is no command or separator nor | |
860 | * alphanumeric, so we call this an error. | |
861 | */ | |
862 | SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, | |
863 | SSL_R_INVALID_COMMAND); | |
864 | retval = found = 0; | |
865 | l++; | |
866 | break; | |
867 | } | |
868 | ||
869 | if (rule == CIPHER_SPECIAL) | |
870 | { | |
871 | found = 0; /* unused -- avoid compiler warning */ | |
872 | break; /* special treatment */ | |
873 | } | |
874 | ||
875 | /* check for multi-part specification */ | |
876 | if (ch == '+') | |
877 | { | |
878 | multi=1; | |
879 | l++; | |
880 | } | |
881 | else | |
882 | multi=0; | |
883 | ||
884 | /* | |
885 | * Now search for the cipher alias in the ca_list. Be careful | |
886 | * with the strncmp, because the "buflen" limitation | |
887 | * will make the rule "ADH:SOME" and the cipher | |
888 | * "ADH-MY-CIPHER" look like a match for buflen=3. | |
889 | * So additionally check whether the cipher name found | |
890 | * has the correct length. We can save a strlen() call: | |
891 | * just checking for the '\0' at the right place is | |
892 | * sufficient, we have to strncmp() anyway. (We cannot | |
893 | * use strcmp(), because buf is not '\0' terminated.) | |
894 | */ | |
895 | j = found = 0; | |
896 | cipher_id = 0; | |
897 | while (ca_list[j]) | |
898 | { | |
899 | if (!strncmp(buf, ca_list[j]->name, buflen) && | |
900 | (ca_list[j]->name[buflen] == '\0')) | |
901 | { | |
902 | found = 1; | |
903 | break; | |
904 | } | |
905 | else | |
906 | j++; | |
907 | } | |
908 | if (!found) | |
909 | break; /* ignore this entry */ | |
910 | ||
911 | if (ca_list[j]->valid) | |
912 | { | |
913 | cipher_id = ca_list[j]->id; | |
914 | break; | |
915 | } | |
916 | ||
917 | /* New algorithms: | |
918 | * 1 - any old restrictions apply outside new mask | |
919 | * 2 - any new restrictions apply outside old mask | |
920 | * 3 - enforce old & new where masks intersect | |
921 | */ | |
922 | algorithms = (algorithms & ~ca_list[j]->mask) | /* 1 */ | |
923 | (ca_list[j]->algorithms & ~mask) | /* 2 */ | |
924 | (algorithms & ca_list[j]->algorithms); /* 3 */ | |
925 | mask |= ca_list[j]->mask; | |
926 | algo_strength = (algo_strength & ~ca_list[j]->mask_strength) | | |
927 | (ca_list[j]->algo_strength & ~mask_strength) | | |
928 | (algo_strength & ca_list[j]->algo_strength); | |
929 | mask_strength |= ca_list[j]->mask_strength; | |
930 | ||
931 | if (!multi) break; | |
932 | } | |
933 | ||
934 | /* | |
935 | * Ok, we have the rule, now apply it | |
936 | */ | |
937 | if (rule == CIPHER_SPECIAL) | |
938 | { /* special command */ | |
939 | ok = 0; | |
940 | if ((buflen == 8) && | |
941 | !strncmp(buf, "STRENGTH", 8)) | |
942 | ok = ssl_cipher_strength_sort(head_p, tail_p); | |
943 | else | |
944 | SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR, | |
945 | SSL_R_INVALID_COMMAND); | |
946 | if (ok == 0) | |
947 | retval = 0; | |
948 | /* | |
949 | * We do not support any "multi" options | |
950 | * together with "@", so throw away the | |
951 | * rest of the command, if any left, until | |
952 | * end or ':' is found. | |
953 | */ | |
954 | while ((*l != '\0') && ITEM_SEP(*l)) | |
955 | l++; | |
956 | } | |
957 | else if (found) | |
958 | { | |
959 | ssl_cipher_apply_rule(cipher_id, algorithms, mask, | |
960 | algo_strength, mask_strength, rule, -1, | |
961 | head_p, tail_p); | |
962 | } | |
963 | else | |
964 | { | |
965 | while ((*l != '\0') && ITEM_SEP(*l)) | |
966 | l++; | |
967 | } | |
968 | if (*l == '\0') break; /* done */ | |
969 | } | |
970 | ||
971 | return(retval); | |
972 | } | |
973 | ||
974 | STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, | |
975 | STACK_OF(SSL_CIPHER) **cipher_list, | |
976 | STACK_OF(SSL_CIPHER) **cipher_list_by_id, | |
977 | const char *rule_str) | |
978 | { | |
979 | int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases; | |
980 | unsigned long disabled_mask; | |
981 | STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list; | |
982 | const char *rule_p; | |
983 | CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr; | |
984 | SSL_CIPHER **ca_list = NULL; | |
985 | ||
986 | /* | |
987 | * Return with error if nothing to do. | |
988 | */ | |
989 | if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL) | |
990 | return NULL; | |
991 | ||
992 | /* | |
993 | * To reduce the work to do we only want to process the compiled | |
994 | * in algorithms, so we first get the mask of disabled ciphers. | |
995 | */ | |
996 | disabled_mask = ssl_cipher_get_disabled(); | |
997 | ||
998 | /* | |
999 | * Now we have to collect the available ciphers from the compiled | |
1000 | * in ciphers. We cannot get more than the number compiled in, so | |
1001 | * it is used for allocation. | |
1002 | */ | |
1003 | num_of_ciphers = ssl_method->num_ciphers(); | |
1004 | #ifdef KSSL_DEBUG | |
1005 | printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers); | |
1006 | #endif /* KSSL_DEBUG */ | |
1007 | co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers); | |
1008 | if (co_list == NULL) | |
1009 | { | |
1010 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); | |
1011 | return(NULL); /* Failure */ | |
1012 | } | |
1013 | ||
1014 | ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask, | |
1015 | co_list, &head, &tail); | |
1016 | ||
1017 | /* | |
1018 | * We also need cipher aliases for selecting based on the rule_str. | |
1019 | * There might be two types of entries in the rule_str: 1) names | |
1020 | * of ciphers themselves 2) aliases for groups of ciphers. | |
1021 | * For 1) we need the available ciphers and for 2) the cipher | |
1022 | * groups of cipher_aliases added together in one list (otherwise | |
1023 | * we would be happy with just the cipher_aliases table). | |
1024 | */ | |
1025 | num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER); | |
1026 | num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1; | |
1027 | ca_list = | |
1028 | (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max); | |
1029 | if (ca_list == NULL) | |
1030 | { | |
1031 | OPENSSL_free(co_list); | |
1032 | SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE); | |
1033 | return(NULL); /* Failure */ | |
1034 | } | |
1035 | ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask, | |
1036 | head); | |
1037 | ||
1038 | /* | |
1039 | * If the rule_string begins with DEFAULT, apply the default rule | |
1040 | * before using the (possibly available) additional rules. | |
1041 | */ | |
1042 | ok = 1; | |
1043 | rule_p = rule_str; | |
1044 | if (strncmp(rule_str,"DEFAULT",7) == 0) | |
1045 | { | |
1046 | ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST, | |
1047 | &head, &tail, ca_list); | |
1048 | rule_p += 7; | |
1049 | if (*rule_p == ':') | |
1050 | rule_p++; | |
1051 | } | |
1052 | ||
1053 | if (ok && (strlen(rule_p) > 0)) | |
1054 | ok = ssl_cipher_process_rulestr(rule_p, &head, &tail, ca_list); | |
1055 | ||
1056 | OPENSSL_free(ca_list); /* Not needed anymore */ | |
1057 | ||
1058 | if (!ok) | |
1059 | { /* Rule processing failure */ | |
1060 | OPENSSL_free(co_list); | |
1061 | return(NULL); | |
1062 | } | |
1063 | /* | |
1064 | * Allocate new "cipherstack" for the result, return with error | |
1065 | * if we cannot get one. | |
1066 | */ | |
1067 | if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) | |
1068 | { | |
1069 | OPENSSL_free(co_list); | |
1070 | return(NULL); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * The cipher selection for the list is done. The ciphers are added | |
1075 | * to the resulting precedence to the STACK_OF(SSL_CIPHER). | |
1076 | */ | |
1077 | for (curr = head; curr != NULL; curr = curr->next) | |
1078 | { | |
1079 | if (curr->active) | |
1080 | { | |
1081 | sk_SSL_CIPHER_push(cipherstack, curr->cipher); | |
1082 | #ifdef CIPHER_DEBUG | |
1083 | printf("<%s>\n",curr->cipher->name); | |
1084 | #endif | |
1085 | } | |
1086 | } | |
1087 | OPENSSL_free(co_list); /* Not needed any longer */ | |
1088 | ||
1089 | tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack); | |
1090 | if (tmp_cipher_list == NULL) | |
1091 | { | |
1092 | sk_SSL_CIPHER_free(cipherstack); | |
1093 | return NULL; | |
1094 | } | |
1095 | if (*cipher_list != NULL) | |
1096 | sk_SSL_CIPHER_free(*cipher_list); | |
1097 | *cipher_list = cipherstack; | |
1098 | if (*cipher_list_by_id != NULL) | |
1099 | sk_SSL_CIPHER_free(*cipher_list_by_id); | |
1100 | *cipher_list_by_id = tmp_cipher_list; | |
1101 | sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp); | |
1102 | ||
1103 | return(cipherstack); | |
1104 | } | |
1105 | ||
1106 | char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len) | |
1107 | { | |
1108 | int is_export,pkl,kl; | |
1109 | const char *ver,*exp_str; | |
1110 | const char *kx,*au,*enc,*mac; | |
1111 | unsigned long alg,alg2,alg_s; | |
1112 | #ifdef KSSL_DEBUG | |
1113 | static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n"; | |
1114 | #else | |
1115 | static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n"; | |
1116 | #endif /* KSSL_DEBUG */ | |
1117 | ||
1118 | alg=cipher->algorithms; | |
1119 | alg_s=cipher->algo_strength; | |
1120 | alg2=cipher->algorithm2; | |
1121 | ||
1122 | is_export=SSL_C_IS_EXPORT(cipher); | |
1123 | pkl=SSL_C_EXPORT_PKEYLENGTH(cipher); | |
1124 | kl=SSL_C_EXPORT_KEYLENGTH(cipher); | |
1125 | exp_str=is_export?" export":""; | |
1126 | ||
1127 | if (alg & SSL_SSLV2) | |
1128 | ver="SSLv2"; | |
1129 | else if (alg & SSL_SSLV3) | |
1130 | ver="SSLv3"; | |
1131 | else | |
1132 | ver="unknown"; | |
1133 | ||
1134 | switch (alg&SSL_MKEY_MASK) | |
1135 | { | |
1136 | case SSL_kRSA: | |
1137 | kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA"; | |
1138 | break; | |
1139 | case SSL_kDHr: | |
1140 | kx="DH/RSA"; | |
1141 | break; | |
1142 | case SSL_kDHd: | |
1143 | kx="DH/DSS"; | |
1144 | break; | |
1145 | case SSL_kKRB5: | |
1146 | kx="KRB5"; | |
1147 | break; | |
1148 | case SSL_kEDH: | |
1149 | kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH"; | |
1150 | break; | |
1151 | case SSL_kECDHr: | |
1152 | kx="ECDH/RSA"; | |
1153 | break; | |
1154 | case SSL_kECDHe: | |
1155 | kx="ECDH/ECDSA"; | |
1156 | break; | |
1157 | case SSL_kEECDH: | |
1158 | kx="ECDH"; | |
1159 | break; | |
1160 | case SSL_kPSK: | |
1161 | kx="PSK"; | |
1162 | break; | |
1163 | default: | |
1164 | kx="unknown"; | |
1165 | } | |
1166 | ||
1167 | switch (alg&SSL_AUTH_MASK) | |
1168 | { | |
1169 | case SSL_aRSA: | |
1170 | au="RSA"; | |
1171 | break; | |
1172 | case SSL_aDSS: | |
1173 | au="DSS"; | |
1174 | break; | |
1175 | case SSL_aDH: | |
1176 | au="DH"; | |
1177 | break; | |
1178 | case SSL_aKRB5: | |
1179 | au="KRB5"; | |
1180 | break; | |
1181 | case SSL_aECDH: | |
1182 | au="ECDH"; | |
1183 | break; | |
1184 | case SSL_aNULL: | |
1185 | au="None"; | |
1186 | break; | |
1187 | case SSL_aECDSA: | |
1188 | au="ECDSA"; | |
1189 | break; | |
1190 | case SSL_aPSK: | |
1191 | au="PSK"; | |
1192 | break; | |
1193 | default: | |
1194 | au="unknown"; | |
1195 | break; | |
1196 | } | |
1197 | ||
1198 | switch (alg&SSL_ENC_MASK) | |
1199 | { | |
1200 | case SSL_DES: | |
1201 | enc=(is_export && kl == 5)?"DES(40)":"DES(56)"; | |
1202 | break; | |
1203 | case SSL_3DES: | |
1204 | enc="3DES(168)"; | |
1205 | break; | |
1206 | case SSL_RC4: | |
1207 | enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)") | |
1208 | :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)"); | |
1209 | break; | |
1210 | case SSL_RC2: | |
1211 | enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)"; | |
1212 | break; | |
1213 | case SSL_IDEA: | |
1214 | enc="IDEA(128)"; | |
1215 | break; | |
1216 | case SSL_eNULL: | |
1217 | enc="None"; | |
1218 | break; | |
1219 | case SSL_AES: | |
1220 | switch(cipher->strength_bits) | |
1221 | { | |
1222 | case 128: enc="AES(128)"; break; | |
1223 | case 192: enc="AES(192)"; break; | |
1224 | case 256: enc="AES(256)"; break; | |
1225 | default: enc="AES(?""?""?)"; break; | |
1226 | } | |
1227 | break; | |
1228 | case SSL_CAMELLIA: | |
1229 | switch(cipher->strength_bits) | |
1230 | { | |
1231 | case 128: enc="Camellia(128)"; break; | |
1232 | case 256: enc="Camellia(256)"; break; | |
1233 | default: enc="Camellia(?""?""?)"; break; | |
1234 | } | |
1235 | break; | |
1236 | ||
1237 | default: | |
1238 | enc="unknown"; | |
1239 | break; | |
1240 | } | |
1241 | ||
1242 | switch (alg&SSL_MAC_MASK) | |
1243 | { | |
1244 | case SSL_MD5: | |
1245 | mac="MD5"; | |
1246 | break; | |
1247 | case SSL_SHA1: | |
1248 | mac="SHA1"; | |
1249 | break; | |
1250 | default: | |
1251 | mac="unknown"; | |
1252 | break; | |
1253 | } | |
1254 | ||
1255 | if (buf == NULL) | |
1256 | { | |
1257 | len=128; | |
1258 | buf=OPENSSL_malloc(len); | |
1259 | if (buf == NULL) return("OPENSSL_malloc Error"); | |
1260 | } | |
1261 | else if (len < 128) | |
1262 | return("Buffer too small"); | |
1263 | ||
1264 | #ifdef KSSL_DEBUG | |
1265 | BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg); | |
1266 | #else | |
1267 | BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str); | |
1268 | #endif /* KSSL_DEBUG */ | |
1269 | return(buf); | |
1270 | } | |
1271 | ||
1272 | char *SSL_CIPHER_get_version(const SSL_CIPHER *c) | |
1273 | { | |
1274 | int i; | |
1275 | ||
1276 | if (c == NULL) return("(NONE)"); | |
1277 | i=(int)(c->id>>24L); | |
1278 | if (i == 3) | |
1279 | return("TLSv1/SSLv3"); | |
1280 | else if (i == 2) | |
1281 | return("SSLv2"); | |
1282 | else | |
1283 | return("unknown"); | |
1284 | } | |
1285 | ||
1286 | /* return the actual cipher being used */ | |
1287 | const char *SSL_CIPHER_get_name(const SSL_CIPHER *c) | |
1288 | { | |
1289 | if (c != NULL) | |
1290 | return(c->name); | |
1291 | return("(NONE)"); | |
1292 | } | |
1293 | ||
1294 | /* number of bits for symmetric cipher */ | |
1295 | int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits) | |
1296 | { | |
1297 | int ret=0; | |
1298 | ||
1299 | if (c != NULL) | |
1300 | { | |
1301 | if (alg_bits != NULL) *alg_bits = c->alg_bits; | |
1302 | ret = c->strength_bits; | |
1303 | } | |
1304 | return(ret); | |
1305 | } | |
1306 | ||
1307 | SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n) | |
1308 | { | |
1309 | SSL_COMP *ctmp; | |
1310 | int i,nn; | |
1311 | ||
1312 | if ((n == 0) || (sk == NULL)) return(NULL); | |
1313 | nn=sk_SSL_COMP_num(sk); | |
1314 | for (i=0; i<nn; i++) | |
1315 | { | |
1316 | ctmp=sk_SSL_COMP_value(sk,i); | |
1317 | if (ctmp->id == n) | |
1318 | return(ctmp); | |
1319 | } | |
1320 | return(NULL); | |
1321 | } | |
1322 | ||
1323 | #ifdef OPENSSL_NO_COMP | |
1324 | void *SSL_COMP_get_compression_methods(void) | |
1325 | { | |
1326 | return NULL; | |
1327 | } | |
1328 | int SSL_COMP_add_compression_method(int id, void *cm) | |
1329 | { | |
1330 | return 1; | |
1331 | } | |
1332 | ||
1333 | const char *SSL_COMP_get_name(const void *comp) | |
1334 | { | |
1335 | return NULL; | |
1336 | } | |
1337 | #else | |
1338 | STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void) | |
1339 | { | |
1340 | load_builtin_compressions(); | |
1341 | return(ssl_comp_methods); | |
1342 | } | |
1343 | ||
1344 | int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm) | |
1345 | { | |
1346 | SSL_COMP *comp; | |
1347 | ||
1348 | if (cm == NULL || cm->type == NID_undef) | |
1349 | return 1; | |
1350 | ||
1351 | /* According to draft-ietf-tls-compression-04.txt, the | |
1352 | compression number ranges should be the following: | |
1353 | ||
1354 | 0 to 63: methods defined by the IETF | |
1355 | 64 to 192: external party methods assigned by IANA | |
1356 | 193 to 255: reserved for private use */ | |
1357 | if (id < 193 || id > 255) | |
1358 | { | |
1359 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE); | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | MemCheck_off(); | |
1364 | comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP)); | |
1365 | comp->id=id; | |
1366 | comp->method=cm; | |
1367 | load_builtin_compressions(); | |
1368 | if (ssl_comp_methods | |
1369 | && !sk_SSL_COMP_find(ssl_comp_methods,comp)) | |
1370 | { | |
1371 | OPENSSL_free(comp); | |
1372 | MemCheck_on(); | |
1373 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID); | |
1374 | return(1); | |
1375 | } | |
1376 | else if ((ssl_comp_methods == NULL) | |
1377 | || !sk_SSL_COMP_push(ssl_comp_methods,comp)) | |
1378 | { | |
1379 | OPENSSL_free(comp); | |
1380 | MemCheck_on(); | |
1381 | SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE); | |
1382 | return(1); | |
1383 | } | |
1384 | else | |
1385 | { | |
1386 | MemCheck_on(); | |
1387 | return(0); | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | const char *SSL_COMP_get_name(const COMP_METHOD *comp) | |
1392 | { | |
1393 | if (comp) | |
1394 | return comp->name; | |
1395 | return NULL; | |
1396 | } | |
1397 | ||
1398 | #endif |