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 #include <stdio.h>
117 #include <openssl/objects.h>
118 #ifndef OPENSSL_NO_COMP
119 # include <openssl/comp.h>
120 #endif
121
122 #include "ssl_locl.h"
123
124 #define SSL_ENC_DES_IDX 0
125 #define SSL_ENC_3DES_IDX 1
126 #define SSL_ENC_RC4_IDX 2
127 #define SSL_ENC_RC2_IDX 3
128 #define SSL_ENC_IDEA_IDX 4
129 #define SSL_ENC_eFZA_IDX 5
130 #define SSL_ENC_NULL_IDX 6
131 #define SSL_ENC_AES128_IDX 7
132 #define SSL_ENC_AES256_IDX 8
133 #define SSL_ENC_CAMELLIA128_IDX 9
134 #define SSL_ENC_CAMELLIA256_IDX 10
135 #define SSL_ENC_SEED_IDX 11
136 #define SSL_ENC_NUM_IDX 12
137
138 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX] = {
139 NULL, NULL, NULL, NULL, NULL, NULL,
140 };
141
142 #define SSL_COMP_NULL_IDX 0
143 #define SSL_COMP_ZLIB_IDX 1
144 #define SSL_COMP_NUM_IDX 2
145
146 static STACK_OF(SSL_COMP) *ssl_comp_methods = NULL;
147
148 #define SSL_MD_MD5_IDX 0
149 #define SSL_MD_SHA1_IDX 1
150 #define SSL_MD_NUM_IDX 2
151 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX] = {
152 NULL, NULL,
153 };
154
155 #define CIPHER_ADD 1
156 #define CIPHER_KILL 2
157 #define CIPHER_DEL 3
158 #define CIPHER_ORD 4
159 #define CIPHER_SPECIAL 5
160
161 typedef struct cipher_order_st {
162 SSL_CIPHER *cipher;
163 int active;
164 int dead;
165 struct cipher_order_st *next, *prev;
166 } CIPHER_ORDER;
167
168 static const SSL_CIPHER cipher_aliases[] = {
169 /* Don't include eNULL unless specifically enabled. */
170 /*
171 * Don't include ECC in ALL because these ciphers are not yet official.
172 */
173 /* must be first */
174 {0, SSL_TXT_ALL, 0, SSL_ALL & ~SSL_eNULL & ~SSL_kECDH & ~SSL_kECDHE,
175 SSL_ALL, 0, 0, 0, SSL_ALL, SSL_ALL},
176 /*
177 * TODO: COMPLEMENT OF ALL do not have ECC cipher suites handled properly.
178 */
179 /* COMPLEMENT OF ALL */
180 {0, SSL_TXT_CMPALL, 0, SSL_eNULL, 0, 0, 0, 0, SSL_ENC_MASK, 0},
181 {0, SSL_TXT_CMPDEF, 0, SSL_ADH, SSL_EXP_MASK, 0, 0, 0, SSL_AUTH_MASK, 0},
182 /* VRS Kerberos5 */
183 {0, SSL_TXT_kKRB5, 0, SSL_kKRB5, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
184 {0, SSL_TXT_kRSA, 0, SSL_kRSA, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
185 {0, SSL_TXT_kDHr, 0, SSL_kDHr, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
186 {0, SSL_TXT_kDHd, 0, SSL_kDHd, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
187 {0, SSL_TXT_kEDH, 0, SSL_kEDH, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
188 {0, SSL_TXT_kFZA, 0, SSL_kFZA, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
189 {0, SSL_TXT_DH, 0, SSL_DH, 0, 0, 0, 0, SSL_MKEY_MASK, 0},
190 {0, SSL_TXT_ECC, 0, (SSL_kECDH | SSL_kECDHE), 0, 0, 0, 0, SSL_MKEY_MASK,
191 0},
192 {0, SSL_TXT_EDH, 0, SSL_EDH, 0, 0, 0, 0, SSL_MKEY_MASK | SSL_AUTH_MASK,
193 0},
194 /* VRS Kerberos5 */
195 {0, SSL_TXT_aKRB5, 0, SSL_aKRB5, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
196 {0, SSL_TXT_aRSA, 0, SSL_aRSA, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
197 {0, SSL_TXT_aDSS, 0, SSL_aDSS, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
198 {0, SSL_TXT_aFZA, 0, SSL_aFZA, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
199 {0, SSL_TXT_aNULL, 0, SSL_aNULL, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
200 {0, SSL_TXT_aDH, 0, SSL_aDH, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
201 {0, SSL_TXT_DSS, 0, SSL_DSS, 0, 0, 0, 0, SSL_AUTH_MASK, 0},
202
203 {0, SSL_TXT_DES, 0, SSL_DES, 0, 0, 0, 0, SSL_ENC_MASK, 0},
204 {0, SSL_TXT_3DES, 0, SSL_3DES, 0, 0, 0, 0, SSL_ENC_MASK, 0},
205 {0, SSL_TXT_RC4, 0, SSL_RC4, 0, 0, 0, 0, SSL_ENC_MASK, 0},
206 {0, SSL_TXT_RC2, 0, SSL_RC2, 0, 0, 0, 0, SSL_ENC_MASK, 0},
207 #ifndef OPENSSL_NO_IDEA
208 {0, SSL_TXT_IDEA, 0, SSL_IDEA, 0, 0, 0, 0, SSL_ENC_MASK, 0},
209 #endif
210 {0, SSL_TXT_SEED, 0, SSL_SEED, 0, 0, 0, 0, SSL_ENC_MASK, 0},
211 {0, SSL_TXT_eNULL, 0, SSL_eNULL, 0, 0, 0, 0, SSL_ENC_MASK, 0},
212 {0, SSL_TXT_eFZA, 0, SSL_eFZA, 0, 0, 0, 0, SSL_ENC_MASK, 0},
213 {0, SSL_TXT_AES, 0, SSL_AES, 0, 0, 0, 0, SSL_ENC_MASK, 0},
214 {0, SSL_TXT_CAMELLIA, 0, SSL_CAMELLIA, 0, 0, 0, 0, SSL_ENC_MASK, 0},
215
216 {0, SSL_TXT_MD5, 0, SSL_MD5, 0, 0, 0, 0, SSL_MAC_MASK, 0},
217 {0, SSL_TXT_SHA1, 0, SSL_SHA1, 0, 0, 0, 0, SSL_MAC_MASK, 0},
218 {0, SSL_TXT_SHA, 0, SSL_SHA, 0, 0, 0, 0, SSL_MAC_MASK, 0},
219
220 {0, SSL_TXT_NULL, 0, SSL_NULL, 0, 0, 0, 0, SSL_ENC_MASK, 0},
221 {0, SSL_TXT_KRB5, 0, SSL_KRB5, 0, 0, 0, 0, SSL_AUTH_MASK | SSL_MKEY_MASK,
222 0},
223 {0, SSL_TXT_RSA, 0, SSL_RSA, 0, 0, 0, 0, SSL_AUTH_MASK | SSL_MKEY_MASK,
224 0},
225 {0, SSL_TXT_ADH, 0, SSL_ADH, 0, 0, 0, 0, SSL_AUTH_MASK | SSL_MKEY_MASK,
226 0},
227 {0, SSL_TXT_FZA, 0, SSL_FZA, 0, 0, 0, 0,
228 SSL_AUTH_MASK | SSL_MKEY_MASK | SSL_ENC_MASK, 0},
229
230 {0, SSL_TXT_SSLV2, 0, SSL_SSLV2, 0, 0, 0, 0, SSL_SSL_MASK, 0},
231 {0, SSL_TXT_SSLV3, 0, SSL_SSLV3, 0, 0, 0, 0, SSL_SSL_MASK, 0},
232 {0, SSL_TXT_TLSV1, 0, SSL_TLSV1, 0, 0, 0, 0, SSL_SSL_MASK, 0},
233
234 {0, SSL_TXT_EXP, 0, 0, SSL_EXPORT, 0, 0, 0, 0, SSL_EXP_MASK},
235 {0, SSL_TXT_EXPORT, 0, 0, SSL_EXPORT, 0, 0, 0, 0, SSL_EXP_MASK},
236 {0, SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0, 0, 0, 0, SSL_STRONG_MASK},
237 {0, SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0, 0, 0, 0, SSL_STRONG_MASK},
238 {0, SSL_TXT_LOW, 0, 0, SSL_LOW, 0, 0, 0, 0, SSL_STRONG_MASK},
239 {0, SSL_TXT_MEDIUM, 0, 0, SSL_MEDIUM, 0, 0, 0, 0, SSL_STRONG_MASK},
240 {0, SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0, 0, 0, 0, SSL_STRONG_MASK},
241 {0, SSL_TXT_FIPS, 0, 0, SSL_FIPS, 0, 0, 0, 0, SSL_FIPS | SSL_STRONG_NONE},
242 };
243
ssl_load_ciphers(void)244 void ssl_load_ciphers(void)
245 {
246 ssl_cipher_methods[SSL_ENC_DES_IDX] = EVP_get_cipherbyname(SN_des_cbc);
247 ssl_cipher_methods[SSL_ENC_3DES_IDX] =
248 EVP_get_cipherbyname(SN_des_ede3_cbc);
249 ssl_cipher_methods[SSL_ENC_RC4_IDX] = EVP_get_cipherbyname(SN_rc4);
250 ssl_cipher_methods[SSL_ENC_RC2_IDX] = EVP_get_cipherbyname(SN_rc2_cbc);
251 #ifndef OPENSSL_NO_IDEA
252 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = EVP_get_cipherbyname(SN_idea_cbc);
253 #else
254 ssl_cipher_methods[SSL_ENC_IDEA_IDX] = NULL;
255 #endif
256 ssl_cipher_methods[SSL_ENC_AES128_IDX] =
257 EVP_get_cipherbyname(SN_aes_128_cbc);
258 ssl_cipher_methods[SSL_ENC_AES256_IDX] =
259 EVP_get_cipherbyname(SN_aes_256_cbc);
260 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] =
261 EVP_get_cipherbyname(SN_camellia_128_cbc);
262 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] =
263 EVP_get_cipherbyname(SN_camellia_256_cbc);
264 ssl_cipher_methods[SSL_ENC_SEED_IDX] = EVP_get_cipherbyname(SN_seed_cbc);
265
266 ssl_digest_methods[SSL_MD_MD5_IDX] = EVP_get_digestbyname(SN_md5);
267 ssl_digest_methods[SSL_MD_SHA1_IDX] = EVP_get_digestbyname(SN_sha1);
268 }
269
270 #ifndef OPENSSL_NO_COMP
271
sk_comp_cmp(const SSL_COMP * const * a,const SSL_COMP * const * b)272 static int sk_comp_cmp(const SSL_COMP *const *a, const SSL_COMP *const *b)
273 {
274 return ((*a)->id - (*b)->id);
275 }
276
load_builtin_compressions(void)277 static void load_builtin_compressions(void)
278 {
279 int got_write_lock = 0;
280
281 CRYPTO_r_lock(CRYPTO_LOCK_SSL);
282 if (ssl_comp_methods == NULL) {
283 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
284 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
285 got_write_lock = 1;
286
287 if (ssl_comp_methods == NULL) {
288 SSL_COMP *comp = NULL;
289
290 MemCheck_off();
291 ssl_comp_methods = sk_SSL_COMP_new(sk_comp_cmp);
292 if (ssl_comp_methods != NULL) {
293 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
294 if (comp != NULL) {
295 comp->method = COMP_zlib();
296 if (comp->method && comp->method->type == NID_undef)
297 OPENSSL_free(comp);
298 else {
299 comp->id = SSL_COMP_ZLIB_IDX;
300 comp->name = comp->method->name;
301 sk_SSL_COMP_push(ssl_comp_methods, comp);
302 }
303 }
304 sk_SSL_COMP_sort(ssl_comp_methods);
305 }
306 MemCheck_on();
307 }
308 }
309
310 if (got_write_lock)
311 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
312 else
313 CRYPTO_r_unlock(CRYPTO_LOCK_SSL);
314 }
315 #endif
316
ssl_cipher_get_evp(const SSL_SESSION * s,const EVP_CIPHER ** enc,const EVP_MD ** md,SSL_COMP ** comp)317 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
318 const EVP_MD **md, SSL_COMP **comp)
319 {
320 int i;
321 SSL_CIPHER *c;
322
323 c = s->cipher;
324 if (c == NULL)
325 return (0);
326 if (comp != NULL) {
327 SSL_COMP ctmp;
328 #ifndef OPENSSL_NO_COMP
329 load_builtin_compressions();
330 #endif
331
332 *comp = NULL;
333 ctmp.id = s->compress_meth;
334 if (ssl_comp_methods != NULL) {
335 i = sk_SSL_COMP_find(ssl_comp_methods, &ctmp);
336 if (i >= 0)
337 *comp = sk_SSL_COMP_value(ssl_comp_methods, i);
338 else
339 *comp = NULL;
340 }
341 }
342
343 if ((enc == NULL) || (md == NULL))
344 return (0);
345
346 switch (c->algorithms & SSL_ENC_MASK) {
347 case SSL_DES:
348 i = SSL_ENC_DES_IDX;
349 break;
350 case SSL_3DES:
351 i = SSL_ENC_3DES_IDX;
352 break;
353 case SSL_RC4:
354 i = SSL_ENC_RC4_IDX;
355 break;
356 case SSL_RC2:
357 i = SSL_ENC_RC2_IDX;
358 break;
359 case SSL_IDEA:
360 i = SSL_ENC_IDEA_IDX;
361 break;
362 case SSL_eNULL:
363 i = SSL_ENC_NULL_IDX;
364 break;
365 case SSL_AES:
366 switch (c->alg_bits) {
367 case 128:
368 i = SSL_ENC_AES128_IDX;
369 break;
370 case 256:
371 i = SSL_ENC_AES256_IDX;
372 break;
373 default:
374 i = -1;
375 break;
376 }
377 break;
378 case SSL_CAMELLIA:
379 switch (c->alg_bits) {
380 case 128:
381 i = SSL_ENC_CAMELLIA128_IDX;
382 break;
383 case 256:
384 i = SSL_ENC_CAMELLIA256_IDX;
385 break;
386 default:
387 i = -1;
388 break;
389 }
390 break;
391 case SSL_SEED:
392 i = SSL_ENC_SEED_IDX;
393 break;
394
395 default:
396 i = -1;
397 break;
398 }
399
400 if ((i < 0) || (i >= SSL_ENC_NUM_IDX))
401 *enc = NULL;
402 else {
403 if (i == SSL_ENC_NULL_IDX)
404 *enc = EVP_enc_null();
405 else
406 *enc = ssl_cipher_methods[i];
407 }
408
409 switch (c->algorithms & SSL_MAC_MASK) {
410 case SSL_MD5:
411 i = SSL_MD_MD5_IDX;
412 break;
413 case SSL_SHA1:
414 i = SSL_MD_SHA1_IDX;
415 break;
416 default:
417 i = -1;
418 break;
419 }
420 if ((i < 0) || (i >= SSL_MD_NUM_IDX))
421 *md = NULL;
422 else
423 *md = ssl_digest_methods[i];
424
425 if ((*enc != NULL) && (*md != NULL))
426 return (1);
427 else
428 return (0);
429 }
430
431 #define ITEM_SEP(a) \
432 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
433
ll_append_tail(CIPHER_ORDER ** head,CIPHER_ORDER * curr,CIPHER_ORDER ** tail)434 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
435 CIPHER_ORDER **tail)
436 {
437 if (curr == *tail)
438 return;
439 if (curr == *head)
440 *head = curr->next;
441 if (curr->prev != NULL)
442 curr->prev->next = curr->next;
443 if (curr->next != NULL) /* should always be true */
444 curr->next->prev = curr->prev;
445 (*tail)->next = curr;
446 curr->prev = *tail;
447 curr->next = NULL;
448 *tail = curr;
449 }
450
451 struct disabled_masks { /* This is a kludge no longer needed with
452 * OpenSSL 0.9.9, where 128-bit and 256-bit
453 * algorithms simply will get separate bits. */
454 unsigned long mask; /* everything except m256 */
455 unsigned long m256; /* applies to 256-bit algorithms only */
456 };
457
ssl_cipher_get_disabled(void)458 static struct disabled_masks ssl_cipher_get_disabled(void)
459 {
460 unsigned long mask;
461 unsigned long m256;
462 struct disabled_masks ret;
463
464 mask = SSL_kFZA;
465 #ifdef OPENSSL_NO_RSA
466 mask |= SSL_aRSA | SSL_kRSA;
467 #endif
468 #ifdef OPENSSL_NO_DSA
469 mask |= SSL_aDSS;
470 #endif
471 #ifdef OPENSSL_NO_DH
472 mask |= SSL_kDHr | SSL_kDHd | SSL_kEDH | SSL_aDH;
473 #endif
474 #ifdef OPENSSL_NO_KRB5
475 mask |= SSL_kKRB5 | SSL_aKRB5;
476 #endif
477 #ifdef OPENSSL_NO_ECDH
478 mask |= SSL_kECDH | SSL_kECDHE;
479 #endif
480 #ifdef SSL_FORBID_ENULL
481 mask |= SSL_eNULL;
482 #endif
483
484 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX] == NULL) ? SSL_DES : 0;
485 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES : 0;
486 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX] == NULL) ? SSL_RC4 : 0;
487 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX] == NULL) ? SSL_RC2 : 0;
488 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA : 0;
489 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA : 0;
490 mask |= (ssl_cipher_methods[SSL_ENC_SEED_IDX] == NULL) ? SSL_SEED : 0;
491
492 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX] == NULL) ? SSL_MD5 : 0;
493 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1 : 0;
494
495 /* finally consider algorithms where mask and m256 differ */
496 m256 = mask;
497 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES : 0;
498 mask |=
499 (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] ==
500 NULL) ? SSL_CAMELLIA : 0;
501 m256 |= (ssl_cipher_methods[SSL_ENC_AES256_IDX] == NULL) ? SSL_AES : 0;
502 m256 |=
503 (ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX] ==
504 NULL) ? SSL_CAMELLIA : 0;
505
506 ret.mask = mask;
507 ret.m256 = m256;
508 return ret;
509 }
510
ssl_cipher_collect_ciphers(const SSL_METHOD * ssl_method,int num_of_ciphers,unsigned long mask,unsigned long m256,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)511 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
512 int num_of_ciphers, unsigned long mask,
513 unsigned long m256,
514 CIPHER_ORDER *co_list,
515 CIPHER_ORDER **head_p,
516 CIPHER_ORDER **tail_p)
517 {
518 int i, co_list_num;
519 SSL_CIPHER *c;
520
521 /*
522 * We have num_of_ciphers descriptions compiled in, depending on the
523 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
524 * These will later be sorted in a linked list with at most num
525 * entries.
526 */
527
528 /* Get the initial list of ciphers */
529 co_list_num = 0; /* actual count of ciphers */
530 for (i = 0; i < num_of_ciphers; i++) {
531 c = ssl_method->get_cipher(i);
532 #define IS_MASKED(c) ((c)->algorithms & (((c)->alg_bits == 256) ? m256 : mask))
533 /* drop those that use any of that is not available */
534 #ifdef OPENSSL_FIPS
535 if ((c != NULL) && c->valid && !IS_MASKED(c)
536 && (!FIPS_mode() || (c->algo_strength & SSL_FIPS)))
537 #else
538 if ((c != NULL) && c->valid && !IS_MASKED(c))
539 #endif
540 {
541 co_list[co_list_num].cipher = c;
542 co_list[co_list_num].next = NULL;
543 co_list[co_list_num].prev = NULL;
544 co_list[co_list_num].active = 0;
545 co_list_num++;
546 #ifdef KSSL_DEBUG
547 printf("\t%d: %s %lx %lx\n", i, c->name, c->id, c->algorithms);
548 #endif /* KSSL_DEBUG */
549 /*
550 * if (!sk_push(ca_list,(char *)c)) goto err;
551 */
552 }
553 }
554
555 /*
556 * Prepare linked list from list entries
557 */
558 for (i = 1; i < co_list_num - 1; i++) {
559 co_list[i].prev = &(co_list[i - 1]);
560 co_list[i].next = &(co_list[i + 1]);
561 }
562 if (co_list_num > 0) {
563 (*head_p) = &(co_list[0]);
564 (*head_p)->prev = NULL;
565 (*head_p)->next = &(co_list[1]);
566 (*tail_p) = &(co_list[co_list_num - 1]);
567 (*tail_p)->prev = &(co_list[co_list_num - 2]);
568 (*tail_p)->next = NULL;
569 }
570 }
571
ssl_cipher_collect_aliases(SSL_CIPHER ** ca_list,int num_of_group_aliases,unsigned long mask,CIPHER_ORDER * head)572 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
573 int num_of_group_aliases,
574 unsigned long mask, CIPHER_ORDER *head)
575 {
576 CIPHER_ORDER *ciph_curr;
577 SSL_CIPHER **ca_curr;
578 int i;
579
580 /*
581 * First, add the real ciphers as already collected
582 */
583 ciph_curr = head;
584 ca_curr = ca_list;
585 while (ciph_curr != NULL) {
586 *ca_curr = ciph_curr->cipher;
587 ca_curr++;
588 ciph_curr = ciph_curr->next;
589 }
590
591 /*
592 * Now we add the available ones from the cipher_aliases[] table.
593 * They represent either an algorithm, that must be fully
594 * supported (not match any bit in mask) or represent a cipher
595 * strength value (will be added in any case because algorithms=0).
596 */
597 for (i = 0; i < num_of_group_aliases; i++) {
598 if ((i == 0) || /* always fetch "ALL" */
599 !(cipher_aliases[i].algorithms & mask)) {
600 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
601 ca_curr++;
602 }
603 }
604
605 *ca_curr = NULL; /* end of list */
606 }
607
ssl_cipher_apply_rule(unsigned long cipher_id,unsigned long ssl_version,unsigned long algorithms,unsigned long mask,unsigned long algo_strength,unsigned long mask_strength,int rule,int strength_bits,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)608 static void ssl_cipher_apply_rule(unsigned long cipher_id,
609 unsigned long ssl_version,
610 unsigned long algorithms,
611 unsigned long mask,
612 unsigned long algo_strength,
613 unsigned long mask_strength, int rule,
614 int strength_bits, CIPHER_ORDER *co_list,
615 CIPHER_ORDER **head_p,
616 CIPHER_ORDER **tail_p)
617 {
618 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
619 SSL_CIPHER *cp;
620 unsigned long ma, ma_s;
621
622 #ifdef CIPHER_DEBUG
623 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
624 rule, algorithms, mask, algo_strength, mask_strength,
625 strength_bits);
626 #endif
627
628 curr = head = *head_p;
629 curr2 = head;
630 tail2 = tail = *tail_p;
631 for (;;) {
632 if ((curr == NULL) || (curr == tail2))
633 break;
634 curr = curr2;
635 curr2 = curr->next;
636
637 cp = curr->cipher;
638 /* Special case: only satisfied by COMPLEMENTOFDEFAULT */
639 if (algo_strength == SSL_EXP_MASK) {
640 if ((SSL_C_IS_EXPORT(cp) || cp->algorithms & SSL_SSLV2
641 || cp->algorithms & SSL_aNULL)
642 && !(cp->algorithms & (SSL_kECDHE|SSL_kECDH)))
643 goto ok;
644 else
645 continue;
646 }
647
648 /*
649 * If explicit cipher suite, match only that one for its own protocol
650 * version. Usual selection criteria will be used for similar
651 * ciphersuites from other version!
652 */
653
654 if (cipher_id && (cp->algorithms & SSL_SSL_MASK) == ssl_version) {
655 if (cp->id != cipher_id)
656 continue;
657 }
658
659 /*
660 * Selection criteria is either the number of strength_bits
661 * or the algorithm used.
662 */
663 else if (strength_bits == -1) {
664 ma = mask & cp->algorithms;
665 ma_s = mask_strength & cp->algo_strength;
666
667 #ifdef CIPHER_DEBUG
668 printf
669 ("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n",
670 cp->name, cp->algorithms, cp->algo_strength, mask,
671 mask_strength);
672 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n",
673 ma, ma_s, ma & algorithms, ma_s & algo_strength);
674 #endif
675 /*
676 * Select: if none of the mask bit was met from the
677 * cipher or not all of the bits were met, the
678 * selection does not apply.
679 */
680 if (((ma == 0) && (ma_s == 0)) ||
681 ((ma & algorithms) != ma) || ((ma_s & algo_strength) != ma_s))
682 continue; /* does not apply */
683 } else if (strength_bits != cp->strength_bits)
684 continue; /* does not apply */
685
686 ok:
687
688 #ifdef CIPHER_DEBUG
689 printf("Action = %d\n", rule);
690 #endif
691
692 /* add the cipher if it has not been added yet. */
693 if (rule == CIPHER_ADD) {
694 if (!curr->active) {
695 int add_this_cipher = 1;
696
697 if (((cp->algorithms & (SSL_kECDHE | SSL_kECDH | SSL_aECDSA))
698 != 0)) {
699 /*
700 * Make sure "ECCdraft" ciphersuites are activated only
701 * if *explicitly* requested, but not implicitly (such as
702 * as part of the "AES" alias).
703 */
704
705 add_this_cipher =
706 (mask & (SSL_kECDHE | SSL_kECDH | SSL_aECDSA)) != 0
707 || cipher_id != 0;
708 }
709
710 if (add_this_cipher) {
711 ll_append_tail(&head, curr, &tail);
712 curr->active = 1;
713 }
714 }
715 }
716 /* Move the added cipher to this location */
717 else if (rule == CIPHER_ORD) {
718 if (curr->active) {
719 ll_append_tail(&head, curr, &tail);
720 }
721 } else if (rule == CIPHER_DEL)
722 curr->active = 0;
723 else if (rule == CIPHER_KILL) {
724 if (head == curr)
725 head = curr->next;
726 else
727 curr->prev->next = curr->next;
728 if (tail == curr)
729 tail = curr->prev;
730 curr->active = 0;
731 if (curr->next != NULL)
732 curr->next->prev = curr->prev;
733 if (curr->prev != NULL)
734 curr->prev->next = curr->next;
735 curr->next = NULL;
736 curr->prev = NULL;
737 }
738 }
739
740 *head_p = head;
741 *tail_p = tail;
742 }
743
ssl_cipher_strength_sort(CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p)744 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
745 CIPHER_ORDER **head_p,
746 CIPHER_ORDER **tail_p)
747 {
748 int max_strength_bits, i, *number_uses;
749 CIPHER_ORDER *curr;
750
751 /*
752 * This routine sorts the ciphers with descending strength. The sorting
753 * must keep the pre-sorted sequence, so we apply the normal sorting
754 * routine as '+' movement to the end of the list.
755 */
756 max_strength_bits = 0;
757 curr = *head_p;
758 while (curr != NULL) {
759 if (curr->active && (curr->cipher->strength_bits > max_strength_bits))
760 max_strength_bits = curr->cipher->strength_bits;
761 curr = curr->next;
762 }
763
764 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
765 if (!number_uses) {
766 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT, ERR_R_MALLOC_FAILURE);
767 return (0);
768 }
769 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
770
771 /*
772 * Now find the strength_bits values actually used
773 */
774 curr = *head_p;
775 while (curr != NULL) {
776 if (curr->active)
777 number_uses[curr->cipher->strength_bits]++;
778 curr = curr->next;
779 }
780 /*
781 * Go through the list of used strength_bits values in descending
782 * order.
783 */
784 for (i = max_strength_bits; i >= 0; i--)
785 if (number_uses[i] > 0)
786 ssl_cipher_apply_rule(0, 0, 0, 0, 0, 0, CIPHER_ORD, i,
787 co_list, head_p, tail_p);
788
789 OPENSSL_free(number_uses);
790 return (1);
791 }
792
ssl_cipher_process_rulestr(const char * rule_str,CIPHER_ORDER * co_list,CIPHER_ORDER ** head_p,CIPHER_ORDER ** tail_p,SSL_CIPHER ** ca_list)793 static int ssl_cipher_process_rulestr(const char *rule_str,
794 CIPHER_ORDER *co_list,
795 CIPHER_ORDER **head_p,
796 CIPHER_ORDER **tail_p,
797 SSL_CIPHER **ca_list)
798 {
799 unsigned long algorithms, mask, algo_strength, mask_strength;
800 const char *l, *buf;
801 int j, multi, found, rule, retval, ok, buflen;
802 unsigned long cipher_id = 0, ssl_version = 0;
803 char ch;
804
805 retval = 1;
806 l = rule_str;
807 for (;;) {
808 ch = *l;
809
810 if (ch == '\0')
811 break; /* done */
812 if (ch == '-') {
813 rule = CIPHER_DEL;
814 l++;
815 } else if (ch == '+') {
816 rule = CIPHER_ORD;
817 l++;
818 } else if (ch == '!') {
819 rule = CIPHER_KILL;
820 l++;
821 } else if (ch == '@') {
822 rule = CIPHER_SPECIAL;
823 l++;
824 } else {
825 rule = CIPHER_ADD;
826 }
827
828 if (ITEM_SEP(ch)) {
829 l++;
830 continue;
831 }
832
833 algorithms = mask = algo_strength = mask_strength = 0;
834
835 for (;;) {
836 ch = *l;
837 buf = l;
838 buflen = 0;
839 #ifndef CHARSET_EBCDIC
840 while (((ch >= 'A') && (ch <= 'Z')) ||
841 ((ch >= '0') && (ch <= '9')) ||
842 ((ch >= 'a') && (ch <= 'z')) || (ch == '-'))
843 #else
844 while (isalnum(ch) || (ch == '-'))
845 #endif
846 {
847 ch = *(++l);
848 buflen++;
849 }
850
851 if (buflen == 0) {
852 /*
853 * We hit something we cannot deal with,
854 * it is no command or separator nor
855 * alphanumeric, so we call this an error.
856 */
857 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
858 SSL_R_INVALID_COMMAND);
859 retval = found = 0;
860 l++;
861 break;
862 }
863
864 if (rule == CIPHER_SPECIAL) {
865 found = 0; /* unused -- avoid compiler warning */
866 break; /* special treatment */
867 }
868
869 /* check for multi-part specification */
870 if (ch == '+') {
871 multi = 1;
872 l++;
873 } else
874 multi = 0;
875
876 /*
877 * Now search for the cipher alias in the ca_list. Be careful
878 * with the strncmp, because the "buflen" limitation
879 * will make the rule "ADH:SOME" and the cipher
880 * "ADH-MY-CIPHER" look like a match for buflen=3.
881 * So additionally check whether the cipher name found
882 * has the correct length. We can save a strlen() call:
883 * just checking for the '\0' at the right place is
884 * sufficient, we have to strncmp() anyway. (We cannot
885 * use strcmp(), because buf is not '\0' terminated.)
886 */
887 j = found = 0;
888 cipher_id = 0;
889 ssl_version = 0;
890 while (ca_list[j]) {
891 if (!strncmp(buf, ca_list[j]->name, buflen) &&
892 (ca_list[j]->name[buflen] == '\0')) {
893 found = 1;
894 break;
895 } else
896 j++;
897 }
898 if (!found)
899 break; /* ignore this entry */
900
901 /*-
902 * New algorithms:
903 * 1 - any old restrictions apply outside new mask
904 * 2 - any new restrictions apply outside old mask
905 * 3 - enforce old & new where masks intersect
906 */
907 algorithms = (algorithms & ~ca_list[j]->mask) | /* 1 */
908 (ca_list[j]->algorithms & ~mask) | /* 2 */
909 (algorithms & ca_list[j]->algorithms); /* 3 */
910 mask |= ca_list[j]->mask;
911 algo_strength = (algo_strength & ~ca_list[j]->mask_strength) |
912 (ca_list[j]->algo_strength & ~mask_strength) |
913 (algo_strength & ca_list[j]->algo_strength);
914 mask_strength |= ca_list[j]->mask_strength;
915
916 /* explicit ciphersuite found */
917 if (ca_list[j]->valid) {
918 cipher_id = ca_list[j]->id;
919 ssl_version = ca_list[j]->algorithms & SSL_SSL_MASK;
920 break;
921 }
922
923 if (!multi)
924 break;
925 }
926
927 /*
928 * Ok, we have the rule, now apply it
929 */
930 if (rule == CIPHER_SPECIAL) { /* special command */
931 ok = 0;
932 if ((buflen == 8) && !strncmp(buf, "STRENGTH", 8))
933 ok = ssl_cipher_strength_sort(co_list, head_p, tail_p);
934 else
935 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
936 SSL_R_INVALID_COMMAND);
937 if (ok == 0)
938 retval = 0;
939 /*
940 * We do not support any "multi" options
941 * together with "@", so throw away the
942 * rest of the command, if any left, until
943 * end or ':' is found.
944 */
945 while ((*l != '\0') && !ITEM_SEP(*l))
946 l++;
947 } else if (found) {
948 ssl_cipher_apply_rule(cipher_id, ssl_version, algorithms, mask,
949 algo_strength, mask_strength, rule, -1,
950 co_list, head_p, tail_p);
951 } else {
952 while ((*l != '\0') && !ITEM_SEP(*l))
953 l++;
954 }
955 if (*l == '\0')
956 break; /* done */
957 }
958
959 return (retval);
960 }
961
STACK_OF(SSL_CIPHER)962 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method, STACK_OF(SSL_CIPHER)
963 **cipher_list, STACK_OF(SSL_CIPHER)
964 **cipher_list_by_id,
965 const char *rule_str)
966 {
967 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
968 unsigned long disabled_mask;
969 unsigned long disabled_m256;
970 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
971 const char *rule_p;
972 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
973 SSL_CIPHER **ca_list = NULL;
974
975 /*
976 * Return with error if nothing to do.
977 */
978 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
979 return NULL;
980
981 /*
982 * To reduce the work to do we only want to process the compiled
983 * in algorithms, so we first get the mask of disabled ciphers.
984 */
985 {
986 struct disabled_masks d;
987 d = ssl_cipher_get_disabled();
988 disabled_mask = d.mask;
989 disabled_m256 = d.m256;
990 }
991
992 /*
993 * Now we have to collect the available ciphers from the compiled
994 * in ciphers. We cannot get more than the number compiled in, so
995 * it is used for allocation.
996 */
997 num_of_ciphers = ssl_method->num_ciphers();
998 #ifdef KSSL_DEBUG
999 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
1000 #endif /* KSSL_DEBUG */
1001 co_list =
1002 (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
1003 if (co_list == NULL) {
1004 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1005 return (NULL); /* Failure */
1006 }
1007
1008 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
1009 disabled_m256, co_list, &head, &tail);
1010
1011 /*
1012 * We also need cipher aliases for selecting based on the rule_str.
1013 * There might be two types of entries in the rule_str: 1) names
1014 * of ciphers themselves 2) aliases for groups of ciphers.
1015 * For 1) we need the available ciphers and for 2) the cipher
1016 * groups of cipher_aliases added together in one list (otherwise
1017 * we would be happy with just the cipher_aliases table).
1018 */
1019 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
1020 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
1021 ca_list =
1022 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) *
1023 num_of_alias_max);
1024 if (ca_list == NULL) {
1025 OPENSSL_free(co_list);
1026 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
1027 return (NULL); /* Failure */
1028 }
1029 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases,
1030 (disabled_mask & disabled_m256), head);
1031
1032 /*
1033 * If the rule_string begins with DEFAULT, apply the default rule
1034 * before using the (possibly available) additional rules.
1035 */
1036 ok = 1;
1037 rule_p = rule_str;
1038 if (strncmp(rule_str, "DEFAULT", 7) == 0) {
1039 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
1040 co_list, &head, &tail, ca_list);
1041 rule_p += 7;
1042 if (*rule_p == ':')
1043 rule_p++;
1044 }
1045
1046 if (ok && (strlen(rule_p) > 0))
1047 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
1048 ca_list);
1049
1050 OPENSSL_free(ca_list); /* Not needed anymore */
1051
1052 if (!ok) { /* Rule processing failure */
1053 OPENSSL_free(co_list);
1054 return (NULL);
1055 }
1056 /*
1057 * Allocate new "cipherstack" for the result, return with error
1058 * if we cannot get one.
1059 */
1060 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL) {
1061 OPENSSL_free(co_list);
1062 return (NULL);
1063 }
1064
1065 /*
1066 * The cipher selection for the list is done. The ciphers are added
1067 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
1068 */
1069 for (curr = head; curr != NULL; curr = curr->next) {
1070 #ifdef OPENSSL_FIPS
1071 if (curr->active
1072 && (!FIPS_mode() || curr->cipher->algo_strength & SSL_FIPS))
1073 #else
1074 if (curr->active)
1075 #endif
1076 {
1077 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
1078 #ifdef CIPHER_DEBUG
1079 printf("<%s>\n", curr->cipher->name);
1080 #endif
1081 }
1082 }
1083 OPENSSL_free(co_list); /* Not needed any longer */
1084
1085 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
1086 if (tmp_cipher_list == NULL) {
1087 sk_SSL_CIPHER_free(cipherstack);
1088 return NULL;
1089 }
1090 if (*cipher_list != NULL)
1091 sk_SSL_CIPHER_free(*cipher_list);
1092 *cipher_list = cipherstack;
1093 if (*cipher_list_by_id != NULL)
1094 sk_SSL_CIPHER_free(*cipher_list_by_id);
1095 *cipher_list_by_id = tmp_cipher_list;
1096 (void)sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,
1097 ssl_cipher_ptr_id_cmp);
1098
1099 sk_SSL_CIPHER_sort(*cipher_list_by_id);
1100 return (cipherstack);
1101 }
1102
SSL_CIPHER_description(const SSL_CIPHER * cipher,char * buf,int len)1103 char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int len)
1104 {
1105 int is_export, pkl, kl;
1106 const char *ver, *exp_str;
1107 const char *kx, *au, *enc, *mac;
1108 unsigned long alg, alg2;
1109 #ifdef KSSL_DEBUG
1110 static const char *format =
1111 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
1112 #else
1113 static const char *format =
1114 "%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1115 #endif /* KSSL_DEBUG */
1116
1117 alg = cipher->algorithms;
1118 alg2 = cipher->algorithm2;
1119
1120 is_export = SSL_C_IS_EXPORT(cipher);
1121 pkl = SSL_C_EXPORT_PKEYLENGTH(cipher);
1122 kl = SSL_C_EXPORT_KEYLENGTH(cipher);
1123 exp_str = is_export ? " export" : "";
1124
1125 if (alg & SSL_SSLV2)
1126 ver = "SSLv2";
1127 else if (alg & SSL_SSLV3)
1128 ver = "SSLv3";
1129 else
1130 ver = "unknown";
1131
1132 switch (alg & SSL_MKEY_MASK) {
1133 case SSL_kRSA:
1134 kx = is_export ? (pkl == 512 ? "RSA(512)" : "RSA(1024)") : "RSA";
1135 break;
1136 case SSL_kDHr:
1137 kx = "DH/RSA";
1138 break;
1139 case SSL_kDHd:
1140 kx = "DH/DSS";
1141 break;
1142 case SSL_kKRB5: /* VRS */
1143 case SSL_KRB5: /* VRS */
1144 kx = "KRB5";
1145 break;
1146 case SSL_kFZA:
1147 kx = "Fortezza";
1148 break;
1149 case SSL_kEDH:
1150 kx = is_export ? (pkl == 512 ? "DH(512)" : "DH(1024)") : "DH";
1151 break;
1152 case SSL_kECDH:
1153 case SSL_kECDHE:
1154 kx = is_export ? "ECDH(<=163)" : "ECDH";
1155 break;
1156 default:
1157 kx = "unknown";
1158 }
1159
1160 switch (alg & SSL_AUTH_MASK) {
1161 case SSL_aRSA:
1162 au = "RSA";
1163 break;
1164 case SSL_aDSS:
1165 au = "DSS";
1166 break;
1167 case SSL_aDH:
1168 au = "DH";
1169 break;
1170 case SSL_aKRB5: /* VRS */
1171 case SSL_KRB5: /* VRS */
1172 au = "KRB5";
1173 break;
1174 case SSL_aFZA:
1175 case SSL_aNULL:
1176 au = "None";
1177 break;
1178 case SSL_aECDSA:
1179 au = "ECDSA";
1180 break;
1181 default:
1182 au = "unknown";
1183 break;
1184 }
1185
1186 switch (alg & SSL_ENC_MASK) {
1187 case SSL_DES:
1188 enc = (is_export && kl == 5) ? "DES(40)" : "DES(56)";
1189 break;
1190 case SSL_3DES:
1191 enc = "3DES(168)";
1192 break;
1193 case SSL_RC4:
1194 enc = is_export ? (kl == 5 ? "RC4(40)" : "RC4(56)")
1195 : ((alg2 & SSL2_CF_8_BYTE_ENC) ? "RC4(64)" : "RC4(128)");
1196 break;
1197 case SSL_RC2:
1198 enc = is_export ? (kl == 5 ? "RC2(40)" : "RC2(56)") : "RC2(128)";
1199 break;
1200 case SSL_IDEA:
1201 enc = "IDEA(128)";
1202 break;
1203 case SSL_eFZA:
1204 enc = "Fortezza";
1205 break;
1206 case SSL_eNULL:
1207 enc = "None";
1208 break;
1209 case SSL_AES:
1210 switch (cipher->strength_bits) {
1211 case 128:
1212 enc = "AES(128)";
1213 break;
1214 case 192:
1215 enc = "AES(192)";
1216 break;
1217 case 256:
1218 enc = "AES(256)";
1219 break;
1220 default:
1221 enc = "AES(?" "?" "?)";
1222 break;
1223 }
1224 break;
1225 case SSL_CAMELLIA:
1226 switch (cipher->strength_bits) {
1227 case 128:
1228 enc = "Camellia(128)";
1229 break;
1230 case 256:
1231 enc = "Camellia(256)";
1232 break;
1233 default:
1234 enc = "Camellia(?" "?" "?)";
1235 break;
1236 }
1237 break;
1238 case SSL_SEED:
1239 enc = "SEED(128)";
1240 break;
1241
1242 default:
1243 enc = "unknown";
1244 break;
1245 }
1246
1247 switch (alg & SSL_MAC_MASK) {
1248 case SSL_MD5:
1249 mac = "MD5";
1250 break;
1251 case SSL_SHA1:
1252 mac = "SHA1";
1253 break;
1254 default:
1255 mac = "unknown";
1256 break;
1257 }
1258
1259 if (buf == NULL) {
1260 len = 128;
1261 buf = OPENSSL_malloc(len);
1262 if (buf == NULL)
1263 return ("OPENSSL_malloc Error");
1264 } else if (len < 128)
1265 return ("Buffer too small");
1266
1267 #ifdef KSSL_DEBUG
1268 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1269 exp_str, alg);
1270 #else
1271 BIO_snprintf(buf, len, format, cipher->name, ver, kx, au, enc, mac,
1272 exp_str);
1273 #endif /* KSSL_DEBUG */
1274 return (buf);
1275 }
1276
SSL_CIPHER_get_version(const SSL_CIPHER * c)1277 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1278 {
1279 int i;
1280
1281 if (c == NULL)
1282 return ("(NONE)");
1283 i = (int)(c->id >> 24L);
1284 if (i == 3)
1285 return ("TLSv1/SSLv3");
1286 else if (i == 2)
1287 return ("SSLv2");
1288 else
1289 return ("unknown");
1290 }
1291
1292 /* return the actual cipher being used */
SSL_CIPHER_get_name(const SSL_CIPHER * c)1293 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1294 {
1295 if (c != NULL)
1296 return (c->name);
1297 return ("(NONE)");
1298 }
1299
1300 /* number of bits for symmetric cipher */
SSL_CIPHER_get_bits(const SSL_CIPHER * c,int * alg_bits)1301 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1302 {
1303 int ret = 0;
1304
1305 if (c != NULL) {
1306 if (alg_bits != NULL)
1307 *alg_bits = c->alg_bits;
1308 ret = c->strength_bits;
1309 }
1310 return (ret);
1311 }
1312
ssl3_comp_find(STACK_OF (SSL_COMP)* sk,int n)1313 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1314 {
1315 SSL_COMP *ctmp;
1316 int i, nn;
1317
1318 if ((n == 0) || (sk == NULL))
1319 return (NULL);
1320 nn = sk_SSL_COMP_num(sk);
1321 for (i = 0; i < nn; i++) {
1322 ctmp = sk_SSL_COMP_value(sk, i);
1323 if (ctmp->id == n)
1324 return (ctmp);
1325 }
1326 return (NULL);
1327 }
1328
1329 #ifdef OPENSSL_NO_COMP
SSL_COMP_get_compression_methods(void)1330 void *SSL_COMP_get_compression_methods(void)
1331 {
1332 return NULL;
1333 }
1334
SSL_COMP_add_compression_method(int id,void * cm)1335 int SSL_COMP_add_compression_method(int id, void *cm)
1336 {
1337 return 1;
1338 }
1339
SSL_COMP_get_name(const void * comp)1340 const char *SSL_COMP_get_name(const void *comp)
1341 {
1342 return NULL;
1343 }
1344 #else
STACK_OF(SSL_COMP)1345 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1346 {
1347 load_builtin_compressions();
1348 return (ssl_comp_methods);
1349 }
1350
SSL_COMP_add_compression_method(int id,COMP_METHOD * cm)1351 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1352 {
1353 SSL_COMP *comp;
1354
1355 if (cm == NULL || cm->type == NID_undef)
1356 return 1;
1357
1358 /*-
1359 * According to draft-ietf-tls-compression-04.txt, the
1360 * compression number ranges should be the following:
1361 *
1362 * 0 to 63: methods defined by the IETF
1363 * 64 to 192: external party methods assigned by IANA
1364 * 193 to 255: reserved for private use
1365 */
1366 if (id < 193 || id > 255) {
1367 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1368 SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1369 return 0;
1370 }
1371
1372 MemCheck_off();
1373 comp = (SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1374 comp->id = id;
1375 comp->method = cm;
1376 load_builtin_compressions();
1377 if (ssl_comp_methods && sk_SSL_COMP_find(ssl_comp_methods, comp) >= 0) {
1378 OPENSSL_free(comp);
1379 MemCheck_on();
1380 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,
1381 SSL_R_DUPLICATE_COMPRESSION_ID);
1382 return (1);
1383 } else if ((ssl_comp_methods == NULL)
1384 || !sk_SSL_COMP_push(ssl_comp_methods, comp)) {
1385 OPENSSL_free(comp);
1386 MemCheck_on();
1387 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD, ERR_R_MALLOC_FAILURE);
1388 return (1);
1389 } else {
1390 MemCheck_on();
1391 return (0);
1392 }
1393 }
1394
SSL_COMP_get_name(const COMP_METHOD * comp)1395 const char *SSL_COMP_get_name(const COMP_METHOD *comp)
1396 {
1397 if (comp)
1398 return comp->name;
1399 return NULL;
1400 }
1401
1402 #endif
1403