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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
4 | * All rights reserved | |
6ae2364d | 5 | * |
bcbf86ec | 6 | * As far as I am concerned, the code I have written for this software |
7 | * can be used freely for any purpose. Any derived versions of this | |
8 | * software must be clearly marked as such, and if the derived work is | |
9 | * incompatible with the protocol description in the RFC file, it must be | |
10 | * called by a name other than "ssh" or "Secure Shell". | |
11 | * | |
12 | * | |
13 | * Copyright (c) 1999 Niels Provos. All rights reserved. | |
a96070d4 | 14 | * Copyright (c) 1999, 2000 Markus Friedl. All rights reserved. |
bcbf86ec | 15 | * |
16 | * Redistribution and use in source and binary forms, with or without | |
17 | * modification, are permitted provided that the following conditions | |
18 | * are met: | |
19 | * 1. Redistributions of source code must retain the above copyright | |
20 | * notice, this list of conditions and the following disclaimer. | |
21 | * 2. Redistributions in binary form must reproduce the above copyright | |
22 | * notice, this list of conditions and the following disclaimer in the | |
23 | * documentation and/or other materials provided with the distribution. | |
6ae2364d | 24 | * |
bcbf86ec | 25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
26 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
27 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
28 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
29 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
30 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
31 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
32 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
33 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
34 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
5260325f | 35 | */ |
8efc0c15 | 36 | |
37 | #include "includes.h" | |
74a66cc8 | 38 | RCSID("$OpenBSD: cipher.c,v 1.74 2005/05/23 23:32:46 djm Exp $"); |
8efc0c15 | 39 | |
a8be9f80 | 40 | #include "xmalloc.h" |
42f11eb2 | 41 | #include "log.h" |
42 | #include "cipher.h" | |
8efc0c15 | 43 | |
44 | #include <openssl/md5.h> | |
70fc1609 | 45 | |
a068d86f | 46 | #if OPENSSL_VERSION_NUMBER < 0x00906000L |
47 | #define SSH_OLD_EVP | |
48 | #define EVP_CIPHER_CTX_get_app_data(e) ((e)->app_data) | |
49 | #endif | |
50 | ||
135247df | 51 | #if OPENSSL_VERSION_NUMBER < 0x00907000L |
3b6e3da9 | 52 | extern const EVP_CIPHER *evp_rijndael(void); |
53 | extern void ssh_rijndael_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); | |
135247df | 54 | #endif |
268c23e9 | 55 | |
56 | #if !defined(EVP_CTRL_SET_ACSS_MODE) | |
c7b91244 | 57 | # if (OPENSSL_VERSION_NUMBER >= 0x00907000L) |
268c23e9 | 58 | extern const EVP_CIPHER *evp_acss(void); |
59 | # define EVP_acss evp_acss | |
60 | # define EVP_CTRL_SET_ACSS_MODE xxx /* used below */ | |
61 | # else | |
62 | # define EVP_acss NULL /* Don't try to support ACSS on older OpenSSL */ | |
63 | # endif /* (OPENSSL_VERSION_NUMBER >= 0x00906000L) */ | |
64 | #endif /* !defined(EVP_CTRL_SET_ACSS_MODE) */ | |
65 | ||
3b6e3da9 | 66 | extern const EVP_CIPHER *evp_ssh1_bf(void); |
67 | extern const EVP_CIPHER *evp_ssh1_3des(void); | |
68 | extern void ssh1_3des_iv(EVP_CIPHER_CTX *, int, u_char *, int); | |
25b66522 | 69 | extern const EVP_CIPHER *evp_aes_128_ctr(void); |
70 | extern void ssh_aes_ctr_iv(EVP_CIPHER_CTX *, int, u_char *, u_int); | |
8efc0c15 | 71 | |
3ee832e5 | 72 | struct Cipher { |
73 | char *name; | |
74 | int number; /* for ssh1 only */ | |
75 | u_int block_size; | |
76 | u_int key_len; | |
74a66cc8 | 77 | u_int discard_len; |
7b5edc2b | 78 | const EVP_CIPHER *(*evptype)(void); |
70fc1609 | 79 | } ciphers[] = { |
74a66cc8 | 80 | { "none", SSH_CIPHER_NONE, 8, 0, 0, EVP_enc_null }, |
81 | { "des", SSH_CIPHER_DES, 8, 8, 0, EVP_des_cbc }, | |
82 | { "3des", SSH_CIPHER_3DES, 8, 16, 0, evp_ssh1_3des }, | |
83 | { "blowfish", SSH_CIPHER_BLOWFISH, 8, 32, 0, evp_ssh1_bf }, | |
70fc1609 | 84 | |
74a66cc8 | 85 | { "3des-cbc", SSH_CIPHER_SSH2, 8, 24, 0, EVP_des_ede3_cbc }, |
86 | { "blowfish-cbc", SSH_CIPHER_SSH2, 8, 16, 0, EVP_bf_cbc }, | |
87 | { "cast128-cbc", SSH_CIPHER_SSH2, 8, 16, 0, EVP_cast5_cbc }, | |
88 | { "arcfour", SSH_CIPHER_SSH2, 8, 16, 0, EVP_rc4 }, | |
89 | { "arcfour128", SSH_CIPHER_SSH2, 8, 16, 1536, EVP_rc4 }, | |
90 | { "arcfour256", SSH_CIPHER_SSH2, 8, 32, 1536, EVP_rc4 }, | |
135247df | 91 | #if OPENSSL_VERSION_NUMBER < 0x00907000L |
74a66cc8 | 92 | { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, 0, evp_rijndael }, |
93 | { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, 0, evp_rijndael }, | |
94 | { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, 0, evp_rijndael }, | |
bf03f2da | 95 | { "rijndael-cbc@lysator.liu.se", |
74a66cc8 | 96 | SSH_CIPHER_SSH2, 16, 32, 0, evp_rijndael }, |
135247df | 97 | #else |
74a66cc8 | 98 | { "aes128-cbc", SSH_CIPHER_SSH2, 16, 16, 0, EVP_aes_128_cbc }, |
99 | { "aes192-cbc", SSH_CIPHER_SSH2, 16, 24, 0, EVP_aes_192_cbc }, | |
100 | { "aes256-cbc", SSH_CIPHER_SSH2, 16, 32, 0, EVP_aes_256_cbc }, | |
135247df | 101 | { "rijndael-cbc@lysator.liu.se", |
74a66cc8 | 102 | SSH_CIPHER_SSH2, 16, 32, 0, EVP_aes_256_cbc }, |
135247df | 103 | #endif |
1c4d41b9 | 104 | #if OPENSSL_VERSION_NUMBER >= 0x00905000L |
74a66cc8 | 105 | { "aes128-ctr", SSH_CIPHER_SSH2, 16, 16, 0, evp_aes_128_ctr }, |
106 | { "aes192-ctr", SSH_CIPHER_SSH2, 16, 24, 0, evp_aes_128_ctr }, | |
107 | { "aes256-ctr", SSH_CIPHER_SSH2, 16, 32, 0, evp_aes_128_ctr }, | |
0a23d79f | 108 | #endif |
268c23e9 | 109 | #if defined(EVP_CTRL_SET_ACSS_MODE) |
74a66cc8 | 110 | { "acss@openssh.org", SSH_CIPHER_SSH2, 16, 5, 0, EVP_acss }, |
268c23e9 | 111 | #endif |
74a66cc8 | 112 | { NULL, SSH_CIPHER_INVALID, 0, 0, 0, NULL } |
94ec8c6b | 113 | }; |
114 | ||
115 | /*--*/ | |
116 | ||
762715ce | 117 | u_int |
b6c7b7b7 | 118 | cipher_blocksize(const Cipher *c) |
3ee832e5 | 119 | { |
120 | return (c->block_size); | |
121 | } | |
3ddc795d | 122 | |
762715ce | 123 | u_int |
b6c7b7b7 | 124 | cipher_keylen(const Cipher *c) |
3ee832e5 | 125 | { |
126 | return (c->key_len); | |
127 | } | |
3ddc795d | 128 | |
762715ce | 129 | u_int |
b6c7b7b7 | 130 | cipher_get_number(const Cipher *c) |
bf8269a9 | 131 | { |
132 | return (c->number); | |
133 | } | |
3ee832e5 | 134 | |
1e3b8b07 | 135 | u_int |
94ec8c6b | 136 | cipher_mask_ssh1(int client) |
8ce64345 | 137 | { |
1e3b8b07 | 138 | u_int mask = 0; |
184eed6a | 139 | mask |= 1 << SSH_CIPHER_3DES; /* Mandatory */ |
94ec8c6b | 140 | mask |= 1 << SSH_CIPHER_BLOWFISH; |
141 | if (client) { | |
142 | mask |= 1 << SSH_CIPHER_DES; | |
143 | } | |
5260325f | 144 | return mask; |
8efc0c15 | 145 | } |
94ec8c6b | 146 | |
147 | Cipher * | |
148 | cipher_by_name(const char *name) | |
8ce64345 | 149 | { |
94ec8c6b | 150 | Cipher *c; |
151 | for (c = ciphers; c->name != NULL; c++) | |
3ebbcf03 | 152 | if (strcmp(c->name, name) == 0) |
94ec8c6b | 153 | return c; |
154 | return NULL; | |
8ce64345 | 155 | } |
8efc0c15 | 156 | |
94ec8c6b | 157 | Cipher * |
158 | cipher_by_number(int id) | |
8efc0c15 | 159 | { |
94ec8c6b | 160 | Cipher *c; |
161 | for (c = ciphers; c->name != NULL; c++) | |
162 | if (c->number == id) | |
163 | return c; | |
164 | return NULL; | |
8efc0c15 | 165 | } |
166 | ||
a8be9f80 | 167 | #define CIPHER_SEP "," |
168 | int | |
169 | ciphers_valid(const char *names) | |
170 | { | |
94ec8c6b | 171 | Cipher *c; |
ca75d7de | 172 | char *cipher_list, *cp; |
a8be9f80 | 173 | char *p; |
a8be9f80 | 174 | |
71276795 | 175 | if (names == NULL || strcmp(names, "") == 0) |
a8be9f80 | 176 | return 0; |
ca75d7de | 177 | cipher_list = cp = xstrdup(names); |
94ec8c6b | 178 | for ((p = strsep(&cp, CIPHER_SEP)); p && *p != '\0'; |
184eed6a | 179 | (p = strsep(&cp, CIPHER_SEP))) { |
94ec8c6b | 180 | c = cipher_by_name(p); |
181 | if (c == NULL || c->number != SSH_CIPHER_SSH2) { | |
182 | debug("bad cipher %s [%s]", p, names); | |
ca75d7de | 183 | xfree(cipher_list); |
a8be9f80 | 184 | return 0; |
94ec8c6b | 185 | } else { |
33de75a3 | 186 | debug3("cipher ok: %s [%s]", p, names); |
a8be9f80 | 187 | } |
188 | } | |
33de75a3 | 189 | debug3("ciphers ok: [%s]", names); |
ca75d7de | 190 | xfree(cipher_list); |
a8be9f80 | 191 | return 1; |
192 | } | |
193 | ||
aa3378df | 194 | /* |
195 | * Parses the name of the cipher. Returns the number of the corresponding | |
196 | * cipher, or -1 on error. | |
197 | */ | |
8efc0c15 | 198 | |
199 | int | |
200 | cipher_number(const char *name) | |
201 | { | |
94ec8c6b | 202 | Cipher *c; |
71276795 | 203 | if (name == NULL) |
204 | return -1; | |
3ebbcf03 | 205 | for (c = ciphers; c->name != NULL; c++) |
206 | if (strcasecmp(c->name, name) == 0) | |
207 | return c->number; | |
208 | return -1; | |
94ec8c6b | 209 | } |
210 | ||
211 | char * | |
212 | cipher_name(int id) | |
213 | { | |
214 | Cipher *c = cipher_by_number(id); | |
215 | return (c==NULL) ? "<unknown>" : c->name; | |
216 | } | |
217 | ||
218 | void | |
70fc1609 | 219 | cipher_init(CipherContext *cc, Cipher *cipher, |
220 | const u_char *key, u_int keylen, const u_char *iv, u_int ivlen, | |
ca75d7de | 221 | int do_encrypt) |
94ec8c6b | 222 | { |
70fc1609 | 223 | static int dowarn = 1; |
a068d86f | 224 | #ifdef SSH_OLD_EVP |
225 | EVP_CIPHER *type; | |
226 | #else | |
70fc1609 | 227 | const EVP_CIPHER *type; |
a068d86f | 228 | #endif |
70fc1609 | 229 | int klen; |
74a66cc8 | 230 | u_char *junk, *discard; |
70fc1609 | 231 | |
232 | if (cipher->number == SSH_CIPHER_DES) { | |
233 | if (dowarn) { | |
234 | error("Warning: use of DES is strongly discouraged " | |
235 | "due to cryptographic weaknesses"); | |
236 | dowarn = 0; | |
237 | } | |
238 | if (keylen > 8) | |
239 | keylen = 8; | |
240 | } | |
241 | cc->plaintext = (cipher->number == SSH_CIPHER_NONE); | |
242 | ||
94ec8c6b | 243 | if (keylen < cipher->key_len) |
244 | fatal("cipher_init: key length %d is insufficient for %s.", | |
245 | keylen, cipher->name); | |
246 | if (iv != NULL && ivlen < cipher->block_size) | |
247 | fatal("cipher_init: iv length %d is insufficient for %s.", | |
248 | ivlen, cipher->name); | |
249 | cc->cipher = cipher; | |
70fc1609 | 250 | |
251 | type = (*cipher->evptype)(); | |
252 | ||
253 | EVP_CIPHER_CTX_init(&cc->evp); | |
a068d86f | 254 | #ifdef SSH_OLD_EVP |
255 | if (type->key_len > 0 && type->key_len != keylen) { | |
256 | debug("cipher_init: set keylen (%d -> %d)", | |
257 | type->key_len, keylen); | |
258 | type->key_len = keylen; | |
259 | } | |
260 | EVP_CipherInit(&cc->evp, type, (u_char *)key, (u_char *)iv, | |
9ea217e8 | 261 | (do_encrypt == CIPHER_ENCRYPT)); |
a068d86f | 262 | #else |
70fc1609 | 263 | if (EVP_CipherInit(&cc->evp, type, NULL, (u_char *)iv, |
ca75d7de | 264 | (do_encrypt == CIPHER_ENCRYPT)) == 0) |
70fc1609 | 265 | fatal("cipher_init: EVP_CipherInit failed for %s", |
266 | cipher->name); | |
267 | klen = EVP_CIPHER_CTX_key_length(&cc->evp); | |
268 | if (klen > 0 && keylen != klen) { | |
a77673cc | 269 | debug2("cipher_init: set keylen (%d -> %d)", klen, keylen); |
70fc1609 | 270 | if (EVP_CIPHER_CTX_set_key_length(&cc->evp, keylen) == 0) |
271 | fatal("cipher_init: set keylen failed (%d -> %d)", | |
272 | klen, keylen); | |
273 | } | |
274 | if (EVP_CipherInit(&cc->evp, NULL, (u_char *)key, NULL, -1) == 0) | |
275 | fatal("cipher_init: EVP_CipherInit: set key failed for %s", | |
276 | cipher->name); | |
a068d86f | 277 | #endif |
74a66cc8 | 278 | |
279 | if (cipher->discard_len > 0) { | |
280 | junk = xmalloc(cipher->discard_len); | |
281 | discard = xmalloc(cipher->discard_len); | |
282 | if (EVP_Cipher(&cc->evp, discard, junk, | |
283 | cipher->discard_len) == 0) | |
284 | fatal("evp_crypt: EVP_Cipher failed during discard"); | |
285 | memset(discard, 0, cipher->discard_len); | |
286 | xfree(junk); | |
287 | xfree(discard); | |
288 | } | |
94ec8c6b | 289 | } |
290 | ||
291 | void | |
3ee832e5 | 292 | cipher_crypt(CipherContext *cc, u_char *dest, const u_char *src, u_int len) |
94ec8c6b | 293 | { |
294 | if (len % cc->cipher->block_size) | |
295 | fatal("cipher_encrypt: bad plaintext length %d", len); | |
a068d86f | 296 | #ifdef SSH_OLD_EVP |
297 | EVP_Cipher(&cc->evp, dest, (u_char *)src, len); | |
298 | #else | |
70fc1609 | 299 | if (EVP_Cipher(&cc->evp, dest, (u_char *)src, len) == 0) |
300 | fatal("evp_crypt: EVP_Cipher failed"); | |
a068d86f | 301 | #endif |
94ec8c6b | 302 | } |
303 | ||
304 | void | |
3ee832e5 | 305 | cipher_cleanup(CipherContext *cc) |
94ec8c6b | 306 | { |
a068d86f | 307 | #ifdef SSH_OLD_EVP |
308 | EVP_CIPHER_CTX_cleanup(&cc->evp); | |
309 | #else | |
70fc1609 | 310 | if (EVP_CIPHER_CTX_cleanup(&cc->evp) == 0) |
311 | error("cipher_cleanup: EVP_CIPHER_CTX_cleanup failed"); | |
a068d86f | 312 | #endif |
8efc0c15 | 313 | } |
314 | ||
aa3378df | 315 | /* |
316 | * Selects the cipher, and keys if by computing the MD5 checksum of the | |
317 | * passphrase and using the resulting 16 bytes as the key. | |
318 | */ | |
8efc0c15 | 319 | |
6ae2364d | 320 | void |
94ec8c6b | 321 | cipher_set_key_string(CipherContext *cc, Cipher *cipher, |
ca75d7de | 322 | const char *passphrase, int do_encrypt) |
8efc0c15 | 323 | { |
5260325f | 324 | MD5_CTX md; |
1e3b8b07 | 325 | u_char digest[16]; |
5260325f | 326 | |
327 | MD5_Init(&md); | |
94ec8c6b | 328 | MD5_Update(&md, (const u_char *)passphrase, strlen(passphrase)); |
5260325f | 329 | MD5_Final(digest, &md); |
330 | ||
ca75d7de | 331 | cipher_init(cc, cipher, digest, 16, NULL, 0, do_encrypt); |
5260325f | 332 | |
333 | memset(digest, 0, sizeof(digest)); | |
334 | memset(&md, 0, sizeof(md)); | |
8efc0c15 | 335 | } |
70fc1609 | 336 | |
762715ce | 337 | /* |
bf8269a9 | 338 | * Exports an IV from the CipherContext required to export the key |
339 | * state back from the unprivileged child to the privileged parent | |
340 | * process. | |
341 | */ | |
342 | ||
343 | int | |
b6c7b7b7 | 344 | cipher_get_keyiv_len(const CipherContext *cc) |
bf8269a9 | 345 | { |
346 | Cipher *c = cc->cipher; | |
347 | int ivlen; | |
348 | ||
349 | if (c->number == SSH_CIPHER_3DES) | |
350 | ivlen = 24; | |
351 | else | |
352 | ivlen = EVP_CIPHER_CTX_iv_length(&cc->evp); | |
353 | return (ivlen); | |
354 | } | |
355 | ||
356 | void | |
357 | cipher_get_keyiv(CipherContext *cc, u_char *iv, u_int len) | |
358 | { | |
359 | Cipher *c = cc->cipher; | |
bf8269a9 | 360 | int evplen; |
361 | ||
362 | switch (c->number) { | |
363 | case SSH_CIPHER_SSH2: | |
364 | case SSH_CIPHER_DES: | |
365 | case SSH_CIPHER_BLOWFISH: | |
366 | evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); | |
367 | if (evplen == 0) | |
368 | return; | |
369 | if (evplen != len) | |
1588c277 | 370 | fatal("%s: wrong iv length %d != %d", __func__, |
bf8269a9 | 371 | evplen, len); |
135247df | 372 | #if OPENSSL_VERSION_NUMBER < 0x00907000L |
18ae3c67 | 373 | if (c->evptype == evp_rijndael) |
374 | ssh_rijndael_iv(&cc->evp, 0, iv, len); | |
375 | else | |
135247df | 376 | #endif |
25b66522 | 377 | if (c->evptype == evp_aes_128_ctr) |
378 | ssh_aes_ctr_iv(&cc->evp, 0, iv, len); | |
379 | else | |
18ae3c67 | 380 | memcpy(iv, cc->evp.iv, len); |
381 | break; | |
382 | case SSH_CIPHER_3DES: | |
383 | ssh1_3des_iv(&cc->evp, 0, iv, 24); | |
bf8269a9 | 384 | break; |
bf8269a9 | 385 | default: |
1588c277 | 386 | fatal("%s: bad cipher %d", __func__, c->number); |
bf8269a9 | 387 | } |
bf8269a9 | 388 | } |
389 | ||
390 | void | |
391 | cipher_set_keyiv(CipherContext *cc, u_char *iv) | |
392 | { | |
393 | Cipher *c = cc->cipher; | |
bf8269a9 | 394 | int evplen = 0; |
395 | ||
396 | switch (c->number) { | |
397 | case SSH_CIPHER_SSH2: | |
398 | case SSH_CIPHER_DES: | |
399 | case SSH_CIPHER_BLOWFISH: | |
400 | evplen = EVP_CIPHER_CTX_iv_length(&cc->evp); | |
401 | if (evplen == 0) | |
402 | return; | |
135247df | 403 | #if OPENSSL_VERSION_NUMBER < 0x00907000L |
18ae3c67 | 404 | if (c->evptype == evp_rijndael) |
405 | ssh_rijndael_iv(&cc->evp, 1, iv, evplen); | |
406 | else | |
135247df | 407 | #endif |
25b66522 | 408 | if (c->evptype == evp_aes_128_ctr) |
409 | ssh_aes_ctr_iv(&cc->evp, 1, iv, evplen); | |
410 | else | |
18ae3c67 | 411 | memcpy(cc->evp.iv, iv, evplen); |
412 | break; | |
413 | case SSH_CIPHER_3DES: | |
414 | ssh1_3des_iv(&cc->evp, 1, iv, 24); | |
bf8269a9 | 415 | break; |
bf8269a9 | 416 | default: |
1588c277 | 417 | fatal("%s: bad cipher %d", __func__, c->number); |
bf8269a9 | 418 | } |
bf8269a9 | 419 | } |
420 | ||
421 | #if OPENSSL_VERSION_NUMBER < 0x00907000L | |
422 | #define EVP_X_STATE(evp) &(evp).c | |
423 | #define EVP_X_STATE_LEN(evp) sizeof((evp).c) | |
424 | #else | |
425 | #define EVP_X_STATE(evp) (evp).cipher_data | |
426 | #define EVP_X_STATE_LEN(evp) (evp).cipher->ctx_size | |
427 | #endif | |
428 | ||
429 | int | |
b6c7b7b7 | 430 | cipher_get_keycontext(const CipherContext *cc, u_char *dat) |
bf8269a9 | 431 | { |
432 | Cipher *c = cc->cipher; | |
9459414c | 433 | int plen = 0; |
bf8269a9 | 434 | |
268c23e9 | 435 | if (c->evptype == EVP_rc4 || c->evptype == EVP_acss) { |
9459414c | 436 | plen = EVP_X_STATE_LEN(cc->evp); |
bf8269a9 | 437 | if (dat == NULL) |
9459414c | 438 | return (plen); |
439 | memcpy(dat, EVP_X_STATE(cc->evp), plen); | |
bf8269a9 | 440 | } |
bf8269a9 | 441 | return (plen); |
442 | } | |
443 | ||
444 | void | |
445 | cipher_set_keycontext(CipherContext *cc, u_char *dat) | |
446 | { | |
447 | Cipher *c = cc->cipher; | |
448 | int plen; | |
449 | ||
268c23e9 | 450 | if (c->evptype == EVP_rc4 || c->evptype == EVP_acss) { |
bf8269a9 | 451 | plen = EVP_X_STATE_LEN(cc->evp); |
452 | memcpy(EVP_X_STATE(cc->evp), dat, plen); | |
453 | } | |
70fc1609 | 454 | } |