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Use DES_set_key_unchecked().
[heimdal.git] / lib / krb5 / crypto.c
blobb4a8ab572a4c37715d1c154575d3a069004948c6
1 /*
2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "krb5_locl.h"
35 RCSID("$Id$");
36 #include <pkinit_asn1.h>
37
38 #undef CRYPTO_DEBUG
39 #ifdef CRYPTO_DEBUG
40 static void krb5_crypto_debug(krb5_context, int, size_t, krb5_keyblock*);
41 #endif
42
43
44 struct key_data {
45 krb5_keyblock *key;
46 krb5_data *schedule;
47 };
48
49 struct key_usage {
50 unsigned usage;
51 struct key_data key;
52 };
53
54 struct krb5_crypto_data {
55 struct encryption_type *et;
56 struct key_data key;
57 int num_key_usage;
58 struct key_usage *key_usage;
59 };
60
61 #define CRYPTO_ETYPE(C) ((C)->et->type)
62
63 /* bits for `flags' below */
64 #define F_KEYED 1 /* checksum is keyed */
65 #define F_CPROOF 2 /* checksum is collision proof */
66 #define F_DERIVED 4 /* uses derived keys */
67 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */
68 #define F_PSEUDO 16 /* not a real protocol type */
69 #define F_SPECIAL 32 /* backwards */
70 #define F_DISABLED 64 /* enctype/checksum disabled */
71
72 struct salt_type {
73 krb5_salttype type;
74 const char *name;
75 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
76 krb5_salt, krb5_data, krb5_keyblock*);
77 };
78
79 struct key_type {
80 krb5_keytype type; /* XXX */
81 const char *name;
82 size_t bits;
83 size_t size;
84 size_t schedule_size;
85 #if 0
86 krb5_enctype best_etype;
87 #endif
88 void (*random_key)(krb5_context, krb5_keyblock*);
89 void (*schedule)(krb5_context, struct key_data *);
90 struct salt_type *string_to_key;
91 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
92 };
93
94 struct checksum_type {
95 krb5_cksumtype type;
96 const char *name;
97 size_t blocksize;
98 size_t checksumsize;
99 unsigned flags;
100 void (*checksum)(krb5_context context,
101 struct key_data *key,
102 const void *buf, size_t len,
103 unsigned usage,
104 Checksum *csum);
105 krb5_error_code (*verify)(krb5_context context,
106 struct key_data *key,
107 const void *buf, size_t len,
108 unsigned usage,
109 Checksum *csum);
110 };
111
112 struct encryption_type {
113 krb5_enctype type;
114 const char *name;
115 heim_oid *oid;
116 size_t blocksize;
117 size_t padsize;
118 size_t confoundersize;
119 struct key_type *keytype;
120 struct checksum_type *checksum;
121 struct checksum_type *keyed_checksum;
122 unsigned flags;
123 krb5_error_code (*encrypt)(krb5_context context,
124 struct key_data *key,
125 void *data, size_t len,
126 krb5_boolean encryptp,
127 int usage,
128 void *ivec);
129 size_t prf_length;
130 krb5_error_code (*prf)(krb5_context,
131 krb5_crypto, const krb5_data *, krb5_data *);
132 };
133
134 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
135 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55)
136 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99)
137
138 static struct checksum_type *_find_checksum(krb5_cksumtype type);
139 static struct encryption_type *_find_enctype(krb5_enctype type);
140 static struct key_type *_find_keytype(krb5_keytype type);
141 static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
142 unsigned, struct key_data**);
143 static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
144 static krb5_error_code derive_key(krb5_context context,
145 struct encryption_type *et,
146 struct key_data *key,
147 const void *constant,
148 size_t len);
149 static krb5_error_code hmac(krb5_context context,
150 struct checksum_type *cm,
151 const void *data,
152 size_t len,
153 unsigned usage,
154 struct key_data *keyblock,
155 Checksum *result);
156 static void free_key_data(krb5_context context, struct key_data *key);
157 static krb5_error_code usage2arcfour (krb5_context, unsigned *);
158 static void xor (DES_cblock *, const unsigned char *);
159
160 /************************************************************
161 * *
162 ************************************************************/
163
164 static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
165
166
167 static void
168 krb5_DES_random_key(krb5_context context,
169 krb5_keyblock *key)
170 {
171 DES_cblock *k = key->keyvalue.data;
172 do {
173 krb5_generate_random_block(k, sizeof(DES_cblock));
174 DES_set_odd_parity(k);
175 } while(DES_is_weak_key(k));
176 }
177
178 static void
179 krb5_DES_schedule(krb5_context context,
180 struct key_data *key)
181 {
182 DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
183 }
184
185 #ifdef ENABLE_AFS_STRING_TO_KEY
186
187 /* This defines the Andrew string_to_key function. It accepts a password
188 * string as input and converts it via a one-way encryption algorithm to a DES
189 * encryption key. It is compatible with the original Andrew authentication
190 * service password database.
191 */
192
193 /*
194 * Short passwords, i.e 8 characters or less.
195 */
196 static void
197 krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
198 krb5_data cell,
199 DES_cblock *key)
200 {
201 char password[8+1]; /* crypt is limited to 8 chars anyway */
202 int i;
203
204 for(i = 0; i < 8; i++) {
205 char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
206 ((i < cell.length) ?
207 tolower(((unsigned char*)cell.data)[i]) : 0);
208 password[i] = c ? c : 'X';
209 }
210 password[8] = '\0';
211
212 memcpy(key, crypt(password, "p1") + 2, sizeof(DES_cblock));
213
214 /* parity is inserted into the LSB so left shift each byte up one
215 bit. This allows ascii characters with a zero MSB to retain as
216 much significance as possible. */
217 for (i = 0; i < sizeof(DES_cblock); i++)
218 ((unsigned char*)key)[i] <<= 1;
219 DES_set_odd_parity (key);
220 }
221
222 /*
223 * Long passwords, i.e 9 characters or more.
224 */
225 static void
226 krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
227 krb5_data cell,
228 DES_cblock *key)
229 {
230 DES_key_schedule schedule;
231 DES_cblock temp_key;
232 DES_cblock ivec;
233 char password[512];
234 size_t passlen;
235
236 memcpy(password, pw.data, min(pw.length, sizeof(password)));
237 if(pw.length < sizeof(password)) {
238 int len = min(cell.length, sizeof(password) - pw.length);
239 int i;
240
241 memcpy(password + pw.length, cell.data, len);
242 for (i = pw.length; i < pw.length + len; ++i)
243 password[i] = tolower((unsigned char)password[i]);
244 }
245 passlen = min(sizeof(password), pw.length + cell.length);
246 memcpy(&ivec, "kerberos", 8);
247 memcpy(&temp_key, "kerberos", 8);
248 DES_set_odd_parity (&temp_key);
249 DES_set_key_unchecked (&temp_key, &schedule);
250 DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
251
252 memcpy(&temp_key, &ivec, 8);
253 DES_set_odd_parity (&temp_key);
254 DES_set_key_unchecked (&temp_key, &schedule);
255 DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
256 memset(&schedule, 0, sizeof(schedule));
257 memset(&temp_key, 0, sizeof(temp_key));
258 memset(&ivec, 0, sizeof(ivec));
259 memset(password, 0, sizeof(password));
260
261 DES_set_odd_parity (key);
262 }
263
264 static krb5_error_code
265 DES_AFS3_string_to_key(krb5_context context,
266 krb5_enctype enctype,
267 krb5_data password,
268 krb5_salt salt,
269 krb5_data opaque,
270 krb5_keyblock *key)
271 {
272 DES_cblock tmp;
273 if(password.length > 8)
274 krb5_DES_AFS3_Transarc_string_to_key(password, salt.saltvalue, &tmp);
275 else
276 krb5_DES_AFS3_CMU_string_to_key(password, salt.saltvalue, &tmp);
277 key->keytype = enctype;
278 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
279 memset(&key, 0, sizeof(key));
280 return 0;
281 }
282 #endif /* ENABLE_AFS_STRING_TO_KEY */
283
284 static void
285 DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
286 {
287 DES_key_schedule schedule;
288 int i;
289 int reverse = 0;
290 unsigned char *p;
291
292 unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
293 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
294 memset(key, 0, 8);
295
296 p = (unsigned char*)key;
297 for (i = 0; i < length; i++) {
298 unsigned char tmp = data[i];
299 if (!reverse)
300 *p++ ^= (tmp << 1);
301 else
302 *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
303 if((i % 8) == 7)
304 reverse = !reverse;
305 }
306 DES_set_odd_parity(key);
307 if(DES_is_weak_key(key))
308 (*key)[7] ^= 0xF0;
309 DES_set_key_unchecked(key, &schedule);
310 DES_cbc_cksum((void*)data, key, length, &schedule, key);
311 memset(&schedule, 0, sizeof(schedule));
312 DES_set_odd_parity(key);
313 if(DES_is_weak_key(key))
314 (*key)[7] ^= 0xF0;
315 }
316
317 static krb5_error_code
318 krb5_DES_string_to_key(krb5_context context,
319 krb5_enctype enctype,
320 krb5_data password,
321 krb5_salt salt,
322 krb5_data opaque,
323 krb5_keyblock *key)
324 {
325 unsigned char *s;
326 size_t len;
327 DES_cblock tmp;
328
329 #ifdef ENABLE_AFS_STRING_TO_KEY
330 if (opaque.length == 1) {
331 unsigned long v;
332 _krb5_get_int(opaque.data, &v, 1);
333 if (v == 1)
334 return DES_AFS3_string_to_key(context, enctype, password,
335 salt, opaque, key);
336 }
337 #endif
338
339 len = password.length + salt.saltvalue.length;
340 s = malloc(len);
341 if(len > 0 && s == NULL) {
342 krb5_set_error_string(context, "malloc: out of memory");
343 return ENOMEM;
344 }
345 memcpy(s, password.data, password.length);
346 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
347 DES_string_to_key_int(s, len, &tmp);
348 key->keytype = enctype;
349 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
350 memset(&tmp, 0, sizeof(tmp));
351 memset(s, 0, len);
352 free(s);
353 return 0;
354 }
355
356 static void
357 krb5_DES_random_to_key(krb5_context context,
358 krb5_keyblock *key,
359 const void *data,
360 size_t size)
361 {
362 DES_cblock *k = key->keyvalue.data;
363 memcpy(k, data, key->keyvalue.length);
364 DES_set_odd_parity(k);
365 if(DES_is_weak_key(k))
366 xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
367 }
368
369 /*
370 *
371 */
372
373 static void
374 DES3_random_key(krb5_context context,
375 krb5_keyblock *key)
376 {
377 DES_cblock *k = key->keyvalue.data;
378 do {
379 krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
380 DES_set_odd_parity(&k[0]);
381 DES_set_odd_parity(&k[1]);
382 DES_set_odd_parity(&k[2]);
383 } while(DES_is_weak_key(&k[0]) ||
384 DES_is_weak_key(&k[1]) ||
385 DES_is_weak_key(&k[2]));
386 }
387
388 static void
389 DES3_schedule(krb5_context context,
390 struct key_data *key)
391 {
392 DES_cblock *k = key->key->keyvalue.data;
393 DES_key_schedule *s = key->schedule->data;
394 DES_set_key_unchecked(&k[0], &s[0]);
395 DES_set_key_unchecked(&k[1], &s[1]);
396 DES_set_key_unchecked(&k[2], &s[2]);
397 }
398
399 /*
400 * A = A xor B. A & B are 8 bytes.
401 */
402
403 static void
404 xor (DES_cblock *key, const unsigned char *b)
405 {
406 unsigned char *a = (unsigned char*)key;
407 a[0] ^= b[0];
408 a[1] ^= b[1];
409 a[2] ^= b[2];
410 a[3] ^= b[3];
411 a[4] ^= b[4];
412 a[5] ^= b[5];
413 a[6] ^= b[6];
414 a[7] ^= b[7];
415 }
416
417 static krb5_error_code
418 DES3_string_to_key(krb5_context context,
419 krb5_enctype enctype,
420 krb5_data password,
421 krb5_salt salt,
422 krb5_data opaque,
423 krb5_keyblock *key)
424 {
425 char *str;
426 size_t len;
427 unsigned char tmp[24];
428 DES_cblock keys[3];
429 krb5_error_code ret;
430
431 len = password.length + salt.saltvalue.length;
432 str = malloc(len);
433 if(len != 0 && str == NULL) {
434 krb5_set_error_string(context, "malloc: out of memory");
435 return ENOMEM;
436 }
437 memcpy(str, password.data, password.length);
438 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
439 {
440 DES_cblock ivec;
441 DES_key_schedule s[3];
442 int i;
443
444 ret = _krb5_n_fold(str, len, tmp, 24);
445 if (ret) {
446 memset(str, 0, len);
447 free(str);
448 krb5_set_error_string(context, "out of memory");
449 return ret;
450 }
451
452 for(i = 0; i < 3; i++){
453 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
454 DES_set_odd_parity(keys + i);
455 if(DES_is_weak_key(keys + i))
456 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
457 DES_set_key_unchecked(keys + i, &s[i]);
458 }
459 memset(&ivec, 0, sizeof(ivec));
460 DES_ede3_cbc_encrypt(tmp,
461 tmp, sizeof(tmp),
462 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
463 memset(s, 0, sizeof(s));
464 memset(&ivec, 0, sizeof(ivec));
465 for(i = 0; i < 3; i++){
466 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
467 DES_set_odd_parity(keys + i);
468 if(DES_is_weak_key(keys + i))
469 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
470 }
471 memset(tmp, 0, sizeof(tmp));
472 }
473 key->keytype = enctype;
474 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
475 memset(keys, 0, sizeof(keys));
476 memset(str, 0, len);
477 free(str);
478 return 0;
479 }
480
481 static krb5_error_code
482 DES3_string_to_key_derived(krb5_context context,
483 krb5_enctype enctype,
484 krb5_data password,
485 krb5_salt salt,
486 krb5_data opaque,
487 krb5_keyblock *key)
488 {
489 krb5_error_code ret;
490 size_t len = password.length + salt.saltvalue.length;
491 char *s;
492
493 s = malloc(len);
494 if(len != 0 && s == NULL) {
495 krb5_set_error_string(context, "malloc: out of memory");
496 return ENOMEM;
497 }
498 memcpy(s, password.data, password.length);
499 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
500 ret = krb5_string_to_key_derived(context,
501 s,
502 len,
503 enctype,
504 key);
505 memset(s, 0, len);
506 free(s);
507 return ret;
508 }
509
510 static void
511 DES3_random_to_key(krb5_context context,
512 krb5_keyblock *key,
513 const void *data,
514 size_t size)
515 {
516 unsigned char *x = key->keyvalue.data;
517 const u_char *q = data;
518 DES_cblock *k;
519 int i, j;
520
521 memset(x, 0, sizeof(x));
522 for (i = 0; i < 3; ++i) {
523 unsigned char foo;
524 for (j = 0; j < 7; ++j) {
525 unsigned char b = q[7 * i + j];
526
527 x[8 * i + j] = b;
528 }
529 foo = 0;
530 for (j = 6; j >= 0; --j) {
531 foo |= q[7 * i + j] & 1;
532 foo <<= 1;
533 }
534 x[8 * i + 7] = foo;
535 }
536 k = key->keyvalue.data;
537 for (i = 0; i < 3; i++) {
538 DES_set_odd_parity(&k[i]);
539 if(DES_is_weak_key(&k[i]))
540 xor(&k[i], (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
541 }
542 }
543
544 /*
545 * ARCFOUR
546 */
547
548 static void
549 ARCFOUR_schedule(krb5_context context,
550 struct key_data *kd)
551 {
552 RC4_set_key (kd->schedule->data,
553 kd->key->keyvalue.length, kd->key->keyvalue.data);
554 }
555
556 static krb5_error_code
557 ARCFOUR_string_to_key(krb5_context context,
558 krb5_enctype enctype,
559 krb5_data password,
560 krb5_salt salt,
561 krb5_data opaque,
562 krb5_keyblock *key)
563 {
564 char *s, *p;
565 size_t len;
566 int i;
567 MD4_CTX m;
568 krb5_error_code ret;
569
570 len = 2 * password.length;
571 s = malloc (len);
572 if (len != 0 && s == NULL) {
573 krb5_set_error_string(context, "malloc: out of memory");
574 ret = ENOMEM;
575 goto out;
576 }
577 for (p = s, i = 0; i < password.length; ++i) {
578 *p++ = ((char *)password.data)[i];
579 *p++ = 0;
580 }
581 MD4_Init (&m);
582 MD4_Update (&m, s, len);
583 key->keytype = enctype;
584 ret = krb5_data_alloc (&key->keyvalue, 16);
585 if (ret) {
586 krb5_set_error_string(context, "malloc: out of memory");
587 goto out;
588 }
589 MD4_Final (key->keyvalue.data, &m);
590 memset (s, 0, len);
591 ret = 0;
592 out:
593 free (s);
594 return ret;
595 }
596
597 /*
598 * AES
599 */
600
601 int _krb5_AES_string_to_default_iterator = 4096;
602
603 static krb5_error_code
604 AES_string_to_key(krb5_context context,
605 krb5_enctype enctype,
606 krb5_data password,
607 krb5_salt salt,
608 krb5_data opaque,
609 krb5_keyblock *key)
610 {
611 krb5_error_code ret;
612 uint32_t iter;
613 struct encryption_type *et;
614 struct key_data kd;
615
616 if (opaque.length == 0)
617 iter = _krb5_AES_string_to_default_iterator;
618 else if (opaque.length == 4) {
619 unsigned long v;
620 _krb5_get_int(opaque.data, &v, 4);
621 iter = ((uint32_t)v);
622 } else
623 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
624
625 et = _find_enctype(enctype);
626 if (et == NULL)
627 return KRB5_PROG_KEYTYPE_NOSUPP;
628
629 kd.schedule = NULL;
630 ALLOC(kd.key, 1);
631 if(kd.key == NULL) {
632 krb5_set_error_string (context, "malloc: out of memory");
633 return ENOMEM;
634 }
635 kd.key->keytype = enctype;
636 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
637 if (ret) {
638 krb5_set_error_string(context, "Failed to allocate pkcs5 key");
639 return ret;
640 }
641
642 ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
643 salt.saltvalue.data, salt.saltvalue.length,
644 iter,
645 et->keytype->size, kd.key->keyvalue.data);
646 if (ret != 1) {
647 free_key_data(context, &kd);
648 krb5_set_error_string(context, "Error calculating s2k");
649 return KRB5_PROG_KEYTYPE_NOSUPP;
650 }
651
652 ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
653 if (ret == 0)
654 ret = krb5_copy_keyblock_contents(context, kd.key, key);
655 free_key_data(context, &kd);
656
657 return ret;
658 }
659
660 struct krb5_aes_schedule {
661 AES_KEY ekey;
662 AES_KEY dkey;
663 };
664
665 static void
666 AES_schedule(krb5_context context,
667 struct key_data *kd)
668 {
669 struct krb5_aes_schedule *key = kd->schedule->data;
670 int bits = kd->key->keyvalue.length * 8;
671
672 memset(key, 0, sizeof(*key));
673 AES_set_encrypt_key(kd->key->keyvalue.data, bits, &key->ekey);
674 AES_set_decrypt_key(kd->key->keyvalue.data, bits, &key->dkey);
675 }
676
677 /*
678 *
679 */
680
681 static struct salt_type des_salt[] = {
682 {
683 KRB5_PW_SALT,
684 "pw-salt",
685 krb5_DES_string_to_key
686 },
687 #ifdef ENABLE_AFS_STRING_TO_KEY
688 {
689 KRB5_AFS3_SALT,
690 "afs3-salt",
691 DES_AFS3_string_to_key
692 },
693 #endif
694 { 0 }
695 };
696
697 static struct salt_type des3_salt[] = {
698 {
699 KRB5_PW_SALT,
700 "pw-salt",
701 DES3_string_to_key
702 },
703 { 0 }
704 };
705
706 static struct salt_type des3_salt_derived[] = {
707 {
708 KRB5_PW_SALT,
709 "pw-salt",
710 DES3_string_to_key_derived
711 },
712 { 0 }
713 };
714
715 static struct salt_type AES_salt[] = {
716 {
717 KRB5_PW_SALT,
718 "pw-salt",
719 AES_string_to_key
720 },
721 { 0 }
722 };
723
724 static struct salt_type arcfour_salt[] = {
725 {
726 KRB5_PW_SALT,
727 "pw-salt",
728 ARCFOUR_string_to_key
729 },
730 { 0 }
731 };
732
733 /*
734 *
735 */
736
737 static struct key_type keytype_null = {
738 KEYTYPE_NULL,
739 "null",
740 0,
741 0,
742 0,
743 NULL,
744 NULL,
745 NULL
746 };
747
748 static struct key_type keytype_des = {
749 KEYTYPE_DES,
750 "des",
751 56,
752 sizeof(DES_cblock),
753 sizeof(DES_key_schedule),
754 krb5_DES_random_key,
755 krb5_DES_schedule,
756 des_salt,
757 krb5_DES_random_to_key
758 };
759
760 static struct key_type keytype_des3 = {
761 KEYTYPE_DES3,
762 "des3",
763 168,
764 3 * sizeof(DES_cblock),
765 3 * sizeof(DES_key_schedule),
766 DES3_random_key,
767 DES3_schedule,
768 des3_salt,
769 DES3_random_to_key
770 };
771
772 static struct key_type keytype_des3_derived = {
773 KEYTYPE_DES3,
774 "des3",
775 168,
776 3 * sizeof(DES_cblock),
777 3 * sizeof(DES_key_schedule),
778 DES3_random_key,
779 DES3_schedule,
780 des3_salt_derived,
781 DES3_random_to_key
782 };
783
784 static struct key_type keytype_aes128 = {
785 KEYTYPE_AES128,
786 "aes-128",
787 128,
788 16,
789 sizeof(struct krb5_aes_schedule),
790 NULL,
791 AES_schedule,
792 AES_salt
793 };
794
795 static struct key_type keytype_aes256 = {
796 KEYTYPE_AES256,
797 "aes-256",
798 256,
799 32,
800 sizeof(struct krb5_aes_schedule),
801 NULL,
802 AES_schedule,
803 AES_salt
804 };
805
806 static struct key_type keytype_arcfour = {
807 KEYTYPE_ARCFOUR,
808 "arcfour",
809 128,
810 16,
811 sizeof(RC4_KEY),
812 NULL,
813 ARCFOUR_schedule,
814 arcfour_salt
815 };
816
817 static struct key_type *keytypes[] = {
818 &keytype_null,
819 &keytype_des,
820 &keytype_des3_derived,
821 &keytype_des3,
822 &keytype_aes128,
823 &keytype_aes256,
824 &keytype_arcfour
825 };
826
827 static int num_keytypes = sizeof(keytypes) / sizeof(keytypes[0]);
828
829 static struct key_type *
830 _find_keytype(krb5_keytype type)
831 {
832 int i;
833 for(i = 0; i < num_keytypes; i++)
834 if(keytypes[i]->type == type)
835 return keytypes[i];
836 return NULL;
837 }
838
839
840 krb5_error_code KRB5_LIB_FUNCTION
841 krb5_salttype_to_string (krb5_context context,
842 krb5_enctype etype,
843 krb5_salttype stype,
844 char **string)
845 {
846 struct encryption_type *e;
847 struct salt_type *st;
848
849 e = _find_enctype (etype);
850 if (e == NULL) {
851 krb5_set_error_string(context, "encryption type %d not supported",
852 etype);
853 return KRB5_PROG_ETYPE_NOSUPP;
854 }
855 for (st = e->keytype->string_to_key; st && st->type; st++) {
856 if (st->type == stype) {
857 *string = strdup (st->name);
858 if (*string == NULL) {
859 krb5_set_error_string(context, "malloc: out of memory");
860 return ENOMEM;
861 }
862 return 0;
863 }
864 }
865 krb5_set_error_string(context, "salttype %d not supported", stype);
866 return HEIM_ERR_SALTTYPE_NOSUPP;
867 }
868
869 krb5_error_code KRB5_LIB_FUNCTION
870 krb5_string_to_salttype (krb5_context context,
871 krb5_enctype etype,
872 const char *string,
873 krb5_salttype *salttype)
874 {
875 struct encryption_type *e;
876 struct salt_type *st;
877
878 e = _find_enctype (etype);
879 if (e == NULL) {
880 krb5_set_error_string(context, "encryption type %d not supported",
881 etype);
882 return KRB5_PROG_ETYPE_NOSUPP;
883 }
884 for (st = e->keytype->string_to_key; st && st->type; st++) {
885 if (strcasecmp (st->name, string) == 0) {
886 *salttype = st->type;
887 return 0;
888 }
889 }
890 krb5_set_error_string(context, "salttype %s not supported", string);
891 return HEIM_ERR_SALTTYPE_NOSUPP;
892 }
893
894 krb5_error_code KRB5_LIB_FUNCTION
895 krb5_get_pw_salt(krb5_context context,
896 krb5_const_principal principal,
897 krb5_salt *salt)
898 {
899 size_t len;
900 int i;
901 krb5_error_code ret;
902 char *p;
903
904 salt->salttype = KRB5_PW_SALT;
905 len = strlen(principal->realm);
906 for (i = 0; i < principal->name.name_string.len; ++i)
907 len += strlen(principal->name.name_string.val[i]);
908 ret = krb5_data_alloc (&salt->saltvalue, len);
909 if (ret)
910 return ret;
911 p = salt->saltvalue.data;
912 memcpy (p, principal->realm, strlen(principal->realm));
913 p += strlen(principal->realm);
914 for (i = 0; i < principal->name.name_string.len; ++i) {
915 memcpy (p,
916 principal->name.name_string.val[i],
917 strlen(principal->name.name_string.val[i]));
918 p += strlen(principal->name.name_string.val[i]);
919 }
920 return 0;
921 }
922
923 krb5_error_code KRB5_LIB_FUNCTION
924 krb5_free_salt(krb5_context context,
925 krb5_salt salt)
926 {
927 krb5_data_free(&salt.saltvalue);
928 return 0;
929 }
930
931 krb5_error_code KRB5_LIB_FUNCTION
932 krb5_string_to_key_data (krb5_context context,
933 krb5_enctype enctype,
934 krb5_data password,
935 krb5_principal principal,
936 krb5_keyblock *key)
937 {
938 krb5_error_code ret;
939 krb5_salt salt;
940
941 ret = krb5_get_pw_salt(context, principal, &salt);
942 if(ret)
943 return ret;
944 ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
945 krb5_free_salt(context, salt);
946 return ret;
947 }
948
949 krb5_error_code KRB5_LIB_FUNCTION
950 krb5_string_to_key (krb5_context context,
951 krb5_enctype enctype,
952 const char *password,
953 krb5_principal principal,
954 krb5_keyblock *key)
955 {
956 krb5_data pw;
957 pw.data = rk_UNCONST(password);
958 pw.length = strlen(password);
959 return krb5_string_to_key_data(context, enctype, pw, principal, key);
960 }
961
962 krb5_error_code KRB5_LIB_FUNCTION
963 krb5_string_to_key_data_salt (krb5_context context,
964 krb5_enctype enctype,
965 krb5_data password,
966 krb5_salt salt,
967 krb5_keyblock *key)
968 {
969 krb5_data opaque;
970 krb5_data_zero(&opaque);
971 return krb5_string_to_key_data_salt_opaque(context, enctype, password,
972 salt, opaque, key);
973 }
974
975 /*
976 * Do a string -> key for encryption type `enctype' operation on
977 * `password' (with salt `salt' and the enctype specific data string
978 * `opaque'), returning the resulting key in `key'
979 */
980
981 krb5_error_code KRB5_LIB_FUNCTION
982 krb5_string_to_key_data_salt_opaque (krb5_context context,
983 krb5_enctype enctype,
984 krb5_data password,
985 krb5_salt salt,
986 krb5_data opaque,
987 krb5_keyblock *key)
988 {
989 struct encryption_type *et =_find_enctype(enctype);
990 struct salt_type *st;
991 if(et == NULL) {
992 krb5_set_error_string(context, "encryption type %d not supported",
993 enctype);
994 return KRB5_PROG_ETYPE_NOSUPP;
995 }
996 for(st = et->keytype->string_to_key; st && st->type; st++)
997 if(st->type == salt.salttype)
998 return (*st->string_to_key)(context, enctype, password,
999 salt, opaque, key);
1000 krb5_set_error_string(context, "salt type %d not supported",
1001 salt.salttype);
1002 return HEIM_ERR_SALTTYPE_NOSUPP;
1003 }
1004
1005 /*
1006 * Do a string -> key for encryption type `enctype' operation on the
1007 * string `password' (with salt `salt'), returning the resulting key
1008 * in `key'
1009 */
1010
1011 krb5_error_code KRB5_LIB_FUNCTION
1012 krb5_string_to_key_salt (krb5_context context,
1013 krb5_enctype enctype,
1014 const char *password,
1015 krb5_salt salt,
1016 krb5_keyblock *key)
1017 {
1018 krb5_data pw;
1019 pw.data = rk_UNCONST(password);
1020 pw.length = strlen(password);
1021 return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
1022 }
1023
1024 krb5_error_code KRB5_LIB_FUNCTION
1025 krb5_string_to_key_salt_opaque (krb5_context context,
1026 krb5_enctype enctype,
1027 const char *password,
1028 krb5_salt salt,
1029 krb5_data opaque,
1030 krb5_keyblock *key)
1031 {
1032 krb5_data pw;
1033 pw.data = rk_UNCONST(password);
1034 pw.length = strlen(password);
1035 return krb5_string_to_key_data_salt_opaque(context, enctype,
1036 pw, salt, opaque, key);
1037 }
1038
1039 krb5_error_code KRB5_LIB_FUNCTION
1040 krb5_keytype_to_string(krb5_context context,
1041 krb5_keytype keytype,
1042 char **string)
1043 {
1044 struct key_type *kt = _find_keytype(keytype);
1045 if(kt == NULL) {
1046 krb5_set_error_string(context, "key type %d not supported", keytype);
1047 return KRB5_PROG_KEYTYPE_NOSUPP;
1048 }
1049 *string = strdup(kt->name);
1050 if(*string == NULL) {
1051 krb5_set_error_string(context, "malloc: out of memory");
1052 return ENOMEM;
1053 }
1054 return 0;
1055 }
1056
1057 krb5_error_code KRB5_LIB_FUNCTION
1058 krb5_string_to_keytype(krb5_context context,
1059 const char *string,
1060 krb5_keytype *keytype)
1061 {
1062 int i;
1063 for(i = 0; i < num_keytypes; i++)
1064 if(strcasecmp(keytypes[i]->name, string) == 0){
1065 *keytype = keytypes[i]->type;
1066 return 0;
1067 }
1068 krb5_set_error_string(context, "key type %s not supported", string);
1069 return KRB5_PROG_KEYTYPE_NOSUPP;
1070 }
1071
1072 krb5_error_code KRB5_LIB_FUNCTION
1073 krb5_enctype_keysize(krb5_context context,
1074 krb5_enctype type,
1075 size_t *keysize)
1076 {
1077 struct encryption_type *et = _find_enctype(type);
1078 if(et == NULL) {
1079 krb5_set_error_string(context, "encryption type %d not supported",
1080 type);
1081 return KRB5_PROG_ETYPE_NOSUPP;
1082 }
1083 *keysize = et->keytype->size;
1084 return 0;
1085 }
1086
1087 krb5_error_code KRB5_LIB_FUNCTION
1088 krb5_enctype_keybits(krb5_context context,
1089 krb5_enctype type,
1090 size_t *keybits)
1091 {
1092 struct encryption_type *et = _find_enctype(type);
1093 if(et == NULL) {
1094 krb5_set_error_string(context, "encryption type %d not supported",
1095 type);
1096 return KRB5_PROG_ETYPE_NOSUPP;
1097 }
1098 *keybits = et->keytype->bits;
1099 return 0;
1100 }
1101
1102 krb5_error_code KRB5_LIB_FUNCTION
1103 krb5_generate_random_keyblock(krb5_context context,
1104 krb5_enctype type,
1105 krb5_keyblock *key)
1106 {
1107 krb5_error_code ret;
1108 struct encryption_type *et = _find_enctype(type);
1109 if(et == NULL) {
1110 krb5_set_error_string(context, "encryption type %d not supported",
1111 type);
1112 return KRB5_PROG_ETYPE_NOSUPP;
1113 }
1114 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
1115 if(ret)
1116 return ret;
1117 key->keytype = type;
1118 if(et->keytype->random_key)
1119 (*et->keytype->random_key)(context, key);
1120 else
1121 krb5_generate_random_block(key->keyvalue.data,
1122 key->keyvalue.length);
1123 return 0;
1124 }
1125
1126 static krb5_error_code
1127 _key_schedule(krb5_context context,
1128 struct key_data *key)
1129 {
1130 krb5_error_code ret;
1131 struct encryption_type *et = _find_enctype(key->key->keytype);
1132 struct key_type *kt = et->keytype;
1133
1134 if(kt->schedule == NULL)
1135 return 0;
1136 if (key->schedule != NULL)
1137 return 0;
1138 ALLOC(key->schedule, 1);
1139 if(key->schedule == NULL) {
1140 krb5_set_error_string(context, "malloc: out of memory");
1141 return ENOMEM;
1142 }
1143 ret = krb5_data_alloc(key->schedule, kt->schedule_size);
1144 if(ret) {
1145 free(key->schedule);
1146 key->schedule = NULL;
1147 return ret;
1148 }
1149 (*kt->schedule)(context, key);
1150 return 0;
1151 }
1152
1153 /************************************************************
1154 * *
1155 ************************************************************/
1156
1157 static void
1158 NONE_checksum(krb5_context context,
1159 struct key_data *key,
1160 const void *data,
1161 size_t len,
1162 unsigned usage,
1163 Checksum *C)
1164 {
1165 }
1166
1167 static void
1168 CRC32_checksum(krb5_context context,
1169 struct key_data *key,
1170 const void *data,
1171 size_t len,
1172 unsigned usage,
1173 Checksum *C)
1174 {
1175 uint32_t crc;
1176 unsigned char *r = C->checksum.data;
1177 _krb5_crc_init_table ();
1178 crc = _krb5_crc_update (data, len, 0);
1179 r[0] = crc & 0xff;
1180 r[1] = (crc >> 8) & 0xff;
1181 r[2] = (crc >> 16) & 0xff;
1182 r[3] = (crc >> 24) & 0xff;
1183 }
1184
1185 static void
1186 RSA_MD4_checksum(krb5_context context,
1187 struct key_data *key,
1188 const void *data,
1189 size_t len,
1190 unsigned usage,
1191 Checksum *C)
1192 {
1193 MD4_CTX m;
1194
1195 MD4_Init (&m);
1196 MD4_Update (&m, data, len);
1197 MD4_Final (C->checksum.data, &m);
1198 }
1199
1200 static void
1201 RSA_MD4_DES_checksum(krb5_context context,
1202 struct key_data *key,
1203 const void *data,
1204 size_t len,
1205 unsigned usage,
1206 Checksum *cksum)
1207 {
1208 MD4_CTX md4;
1209 DES_cblock ivec;
1210 unsigned char *p = cksum->checksum.data;
1211
1212 krb5_generate_random_block(p, 8);
1213 MD4_Init (&md4);
1214 MD4_Update (&md4, p, 8);
1215 MD4_Update (&md4, data, len);
1216 MD4_Final (p + 8, &md4);
1217 memset (&ivec, 0, sizeof(ivec));
1218 DES_cbc_encrypt(p,
1219 p,
1220 24,
1221 key->schedule->data,
1222 &ivec,
1223 DES_ENCRYPT);
1224 }
1225
1226 static krb5_error_code
1227 RSA_MD4_DES_verify(krb5_context context,
1228 struct key_data *key,
1229 const void *data,
1230 size_t len,
1231 unsigned usage,
1232 Checksum *C)
1233 {
1234 MD4_CTX md4;
1235 unsigned char tmp[24];
1236 unsigned char res[16];
1237 DES_cblock ivec;
1238 krb5_error_code ret = 0;
1239
1240 memset(&ivec, 0, sizeof(ivec));
1241 DES_cbc_encrypt(C->checksum.data,
1242 (void*)tmp,
1243 C->checksum.length,
1244 key->schedule->data,
1245 &ivec,
1246 DES_DECRYPT);
1247 MD4_Init (&md4);
1248 MD4_Update (&md4, tmp, 8); /* confounder */
1249 MD4_Update (&md4, data, len);
1250 MD4_Final (res, &md4);
1251 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1252 krb5_clear_error_string (context);
1253 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1254 }
1255 memset(tmp, 0, sizeof(tmp));
1256 memset(res, 0, sizeof(res));
1257 return ret;
1258 }
1259
1260 static void
1261 RSA_MD5_checksum(krb5_context context,
1262 struct key_data *key,
1263 const void *data,
1264 size_t len,
1265 unsigned usage,
1266 Checksum *C)
1267 {
1268 MD5_CTX m;
1269
1270 MD5_Init (&m);
1271 MD5_Update(&m, data, len);
1272 MD5_Final (C->checksum.data, &m);
1273 }
1274
1275 static void
1276 RSA_MD5_DES_checksum(krb5_context context,
1277 struct key_data *key,
1278 const void *data,
1279 size_t len,
1280 unsigned usage,
1281 Checksum *C)
1282 {
1283 MD5_CTX md5;
1284 DES_cblock ivec;
1285 unsigned char *p = C->checksum.data;
1286
1287 krb5_generate_random_block(p, 8);
1288 MD5_Init (&md5);
1289 MD5_Update (&md5, p, 8);
1290 MD5_Update (&md5, data, len);
1291 MD5_Final (p + 8, &md5);
1292 memset (&ivec, 0, sizeof(ivec));
1293 DES_cbc_encrypt(p,
1294 p,
1295 24,
1296 key->schedule->data,
1297 &ivec,
1298 DES_ENCRYPT);
1299 }
1300
1301 static krb5_error_code
1302 RSA_MD5_DES_verify(krb5_context context,
1303 struct key_data *key,
1304 const void *data,
1305 size_t len,
1306 unsigned usage,
1307 Checksum *C)
1308 {
1309 MD5_CTX md5;
1310 unsigned char tmp[24];
1311 unsigned char res[16];
1312 DES_cblock ivec;
1313 DES_key_schedule *sched = key->schedule->data;
1314 krb5_error_code ret = 0;
1315
1316 memset(&ivec, 0, sizeof(ivec));
1317 DES_cbc_encrypt(C->checksum.data,
1318 (void*)tmp,
1319 C->checksum.length,
1320 &sched[0],
1321 &ivec,
1322 DES_DECRYPT);
1323 MD5_Init (&md5);
1324 MD5_Update (&md5, tmp, 8); /* confounder */
1325 MD5_Update (&md5, data, len);
1326 MD5_Final (res, &md5);
1327 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1328 krb5_clear_error_string (context);
1329 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1330 }
1331 memset(tmp, 0, sizeof(tmp));
1332 memset(res, 0, sizeof(res));
1333 return ret;
1334 }
1335
1336 static void
1337 RSA_MD5_DES3_checksum(krb5_context context,
1338 struct key_data *key,
1339 const void *data,
1340 size_t len,
1341 unsigned usage,
1342 Checksum *C)
1343 {
1344 MD5_CTX md5;
1345 DES_cblock ivec;
1346 unsigned char *p = C->checksum.data;
1347 DES_key_schedule *sched = key->schedule->data;
1348
1349 krb5_generate_random_block(p, 8);
1350 MD5_Init (&md5);
1351 MD5_Update (&md5, p, 8);
1352 MD5_Update (&md5, data, len);
1353 MD5_Final (p + 8, &md5);
1354 memset (&ivec, 0, sizeof(ivec));
1355 DES_ede3_cbc_encrypt(p,
1356 p,
1357 24,
1358 &sched[0], &sched[1], &sched[2],
1359 &ivec,
1360 DES_ENCRYPT);
1361 }
1362
1363 static krb5_error_code
1364 RSA_MD5_DES3_verify(krb5_context context,
1365 struct key_data *key,
1366 const void *data,
1367 size_t len,
1368 unsigned usage,
1369 Checksum *C)
1370 {
1371 MD5_CTX md5;
1372 unsigned char tmp[24];
1373 unsigned char res[16];
1374 DES_cblock ivec;
1375 DES_key_schedule *sched = key->schedule->data;
1376 krb5_error_code ret = 0;
1377
1378 memset(&ivec, 0, sizeof(ivec));
1379 DES_ede3_cbc_encrypt(C->checksum.data,
1380 (void*)tmp,
1381 C->checksum.length,
1382 &sched[0], &sched[1], &sched[2],
1383 &ivec,
1384 DES_DECRYPT);
1385 MD5_Init (&md5);
1386 MD5_Update (&md5, tmp, 8); /* confounder */
1387 MD5_Update (&md5, data, len);
1388 MD5_Final (res, &md5);
1389 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1390 krb5_clear_error_string (context);
1391 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1392 }
1393 memset(tmp, 0, sizeof(tmp));
1394 memset(res, 0, sizeof(res));
1395 return ret;
1396 }
1397
1398 static void
1399 SHA1_checksum(krb5_context context,
1400 struct key_data *key,
1401 const void *data,
1402 size_t len,
1403 unsigned usage,
1404 Checksum *C)
1405 {
1406 SHA_CTX m;
1407
1408 SHA1_Init(&m);
1409 SHA1_Update(&m, data, len);
1410 SHA1_Final(C->checksum.data, &m);
1411 }
1412
1413 /* HMAC according to RFC2104 */
1414 static krb5_error_code
1415 hmac(krb5_context context,
1416 struct checksum_type *cm,
1417 const void *data,
1418 size_t len,
1419 unsigned usage,
1420 struct key_data *keyblock,
1421 Checksum *result)
1422 {
1423 unsigned char *ipad, *opad;
1424 unsigned char *key;
1425 size_t key_len;
1426 int i;
1427
1428 ipad = malloc(cm->blocksize + len);
1429 if (ipad == NULL)
1430 return ENOMEM;
1431 opad = malloc(cm->blocksize + cm->checksumsize);
1432 if (opad == NULL) {
1433 free(ipad);
1434 return ENOMEM;
1435 }
1436 memset(ipad, 0x36, cm->blocksize);
1437 memset(opad, 0x5c, cm->blocksize);
1438
1439 if(keyblock->key->keyvalue.length > cm->blocksize){
1440 (*cm->checksum)(context,
1441 keyblock,
1442 keyblock->key->keyvalue.data,
1443 keyblock->key->keyvalue.length,
1444 usage,
1445 result);
1446 key = result->checksum.data;
1447 key_len = result->checksum.length;
1448 } else {
1449 key = keyblock->key->keyvalue.data;
1450 key_len = keyblock->key->keyvalue.length;
1451 }
1452 for(i = 0; i < key_len; i++){
1453 ipad[i] ^= key[i];
1454 opad[i] ^= key[i];
1455 }
1456 memcpy(ipad + cm->blocksize, data, len);
1457 (*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
1458 usage, result);
1459 memcpy(opad + cm->blocksize, result->checksum.data,
1460 result->checksum.length);
1461 (*cm->checksum)(context, keyblock, opad,
1462 cm->blocksize + cm->checksumsize, usage, result);
1463 memset(ipad, 0, cm->blocksize + len);
1464 free(ipad);
1465 memset(opad, 0, cm->blocksize + cm->checksumsize);
1466 free(opad);
1467
1468 return 0;
1469 }
1470
1471 krb5_error_code KRB5_LIB_FUNCTION
1472 krb5_hmac(krb5_context context,
1473 krb5_cksumtype cktype,
1474 const void *data,
1475 size_t len,
1476 unsigned usage,
1477 krb5_keyblock *key,
1478 Checksum *result)
1479 {
1480 struct checksum_type *c = _find_checksum(cktype);
1481 struct key_data kd;
1482 krb5_error_code ret;
1483
1484 if (c == NULL) {
1485 krb5_set_error_string (context, "checksum type %d not supported",
1486 cktype);
1487 return KRB5_PROG_SUMTYPE_NOSUPP;
1488 }
1489
1490 kd.key = key;
1491 kd.schedule = NULL;
1492
1493 ret = hmac(context, c, data, len, usage, &kd, result);
1494
1495 if (kd.schedule)
1496 krb5_free_data(context, kd.schedule);
1497
1498 return ret;
1499 }
1500
1501 static void
1502 SP_HMAC_SHA1_checksum(krb5_context context,
1503 struct key_data *key,
1504 const void *data,
1505 size_t len,
1506 unsigned usage,
1507 Checksum *result)
1508 {
1509 struct checksum_type *c = _find_checksum(CKSUMTYPE_SHA1);
1510 Checksum res;
1511 char sha1_data[20];
1512 krb5_error_code ret;
1513
1514 res.checksum.data = sha1_data;
1515 res.checksum.length = sizeof(sha1_data);
1516
1517 ret = hmac(context, c, data, len, usage, key, &res);
1518 if (ret)
1519 krb5_abortx(context, "hmac failed");
1520 memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
1521 }
1522
1523 /*
1524 * checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
1525 */
1526
1527 static void
1528 HMAC_MD5_checksum(krb5_context context,
1529 struct key_data *key,
1530 const void *data,
1531 size_t len,
1532 unsigned usage,
1533 Checksum *result)
1534 {
1535 MD5_CTX md5;
1536 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1537 const char signature[] = "signaturekey";
1538 Checksum ksign_c;
1539 struct key_data ksign;
1540 krb5_keyblock kb;
1541 unsigned char t[4];
1542 unsigned char tmp[16];
1543 unsigned char ksign_c_data[16];
1544 krb5_error_code ret;
1545
1546 ksign_c.checksum.length = sizeof(ksign_c_data);
1547 ksign_c.checksum.data = ksign_c_data;
1548 ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
1549 if (ret)
1550 krb5_abortx(context, "hmac failed");
1551 ksign.key = &kb;
1552 kb.keyvalue = ksign_c.checksum;
1553 MD5_Init (&md5);
1554 t[0] = (usage >> 0) & 0xFF;
1555 t[1] = (usage >> 8) & 0xFF;
1556 t[2] = (usage >> 16) & 0xFF;
1557 t[3] = (usage >> 24) & 0xFF;
1558 MD5_Update (&md5, t, 4);
1559 MD5_Update (&md5, data, len);
1560 MD5_Final (tmp, &md5);
1561 ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
1562 if (ret)
1563 krb5_abortx(context, "hmac failed");
1564 }
1565
1566 /*
1567 * same as previous but being used while encrypting.
1568 */
1569
1570 static void
1571 HMAC_MD5_checksum_enc(krb5_context context,
1572 struct key_data *key,
1573 const void *data,
1574 size_t len,
1575 unsigned usage,
1576 Checksum *result)
1577 {
1578 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1579 Checksum ksign_c;
1580 struct key_data ksign;
1581 krb5_keyblock kb;
1582 unsigned char t[4];
1583 unsigned char ksign_c_data[16];
1584 krb5_error_code ret;
1585
1586 t[0] = (usage >> 0) & 0xFF;
1587 t[1] = (usage >> 8) & 0xFF;
1588 t[2] = (usage >> 16) & 0xFF;
1589 t[3] = (usage >> 24) & 0xFF;
1590
1591 ksign_c.checksum.length = sizeof(ksign_c_data);
1592 ksign_c.checksum.data = ksign_c_data;
1593 ret = hmac(context, c, t, sizeof(t), 0, key, &ksign_c);
1594 if (ret)
1595 krb5_abortx(context, "hmac failed");
1596 ksign.key = &kb;
1597 kb.keyvalue = ksign_c.checksum;
1598 ret = hmac(context, c, data, len, 0, &ksign, result);
1599 if (ret)
1600 krb5_abortx(context, "hmac failed");
1601 }
1602
1603 static struct checksum_type checksum_none = {
1604 CKSUMTYPE_NONE,
1605 "none",
1606 1,
1607 0,
1608 0,
1609 NONE_checksum,
1610 NULL
1611 };
1612 static struct checksum_type checksum_crc32 = {
1613 CKSUMTYPE_CRC32,
1614 "crc32",
1615 1,
1616 4,
1617 0,
1618 CRC32_checksum,
1619 NULL
1620 };
1621 static struct checksum_type checksum_rsa_md4 = {
1622 CKSUMTYPE_RSA_MD4,
1623 "rsa-md4",
1624 64,
1625 16,
1626 F_CPROOF,
1627 RSA_MD4_checksum,
1628 NULL
1629 };
1630 static struct checksum_type checksum_rsa_md4_des = {
1631 CKSUMTYPE_RSA_MD4_DES,
1632 "rsa-md4-des",
1633 64,
1634 24,
1635 F_KEYED | F_CPROOF | F_VARIANT,
1636 RSA_MD4_DES_checksum,
1637 RSA_MD4_DES_verify
1638 };
1639 #if 0
1640 static struct checksum_type checksum_des_mac = {
1641 CKSUMTYPE_DES_MAC,
1642 "des-mac",
1643 0,
1644 0,
1645 0,
1646 DES_MAC_checksum
1647 };
1648 static struct checksum_type checksum_des_mac_k = {
1649 CKSUMTYPE_DES_MAC_K,
1650 "des-mac-k",
1651 0,
1652 0,
1653 0,
1654 DES_MAC_K_checksum
1655 };
1656 static struct checksum_type checksum_rsa_md4_des_k = {
1657 CKSUMTYPE_RSA_MD4_DES_K,
1658 "rsa-md4-des-k",
1659 0,
1660 0,
1661 0,
1662 RSA_MD4_DES_K_checksum,
1663 RSA_MD4_DES_K_verify
1664 };
1665 #endif
1666 static struct checksum_type checksum_rsa_md5 = {
1667 CKSUMTYPE_RSA_MD5,
1668 "rsa-md5",
1669 64,
1670 16,
1671 F_CPROOF,
1672 RSA_MD5_checksum,
1673 NULL
1674 };
1675 static struct checksum_type checksum_rsa_md5_des = {
1676 CKSUMTYPE_RSA_MD5_DES,
1677 "rsa-md5-des",
1678 64,
1679 24,
1680 F_KEYED | F_CPROOF | F_VARIANT,
1681 RSA_MD5_DES_checksum,
1682 RSA_MD5_DES_verify
1683 };
1684 static struct checksum_type checksum_rsa_md5_des3 = {
1685 CKSUMTYPE_RSA_MD5_DES3,
1686 "rsa-md5-des3",
1687 64,
1688 24,
1689 F_KEYED | F_CPROOF | F_VARIANT,
1690 RSA_MD5_DES3_checksum,
1691 RSA_MD5_DES3_verify
1692 };
1693 static struct checksum_type checksum_sha1 = {
1694 CKSUMTYPE_SHA1,
1695 "sha1",
1696 64,
1697 20,
1698 F_CPROOF,
1699 SHA1_checksum,
1700 NULL
1701 };
1702 static struct checksum_type checksum_hmac_sha1_des3 = {
1703 CKSUMTYPE_HMAC_SHA1_DES3,
1704 "hmac-sha1-des3",
1705 64,
1706 20,
1707 F_KEYED | F_CPROOF | F_DERIVED,
1708 SP_HMAC_SHA1_checksum,
1709 NULL
1710 };
1711
1712 static struct checksum_type checksum_hmac_sha1_aes128 = {
1713 CKSUMTYPE_HMAC_SHA1_96_AES_128,
1714 "hmac-sha1-96-aes128",
1715 64,
1716 12,
1717 F_KEYED | F_CPROOF | F_DERIVED,
1718 SP_HMAC_SHA1_checksum,
1719 NULL
1720 };
1721
1722 static struct checksum_type checksum_hmac_sha1_aes256 = {
1723 CKSUMTYPE_HMAC_SHA1_96_AES_256,
1724 "hmac-sha1-96-aes256",
1725 64,
1726 12,
1727 F_KEYED | F_CPROOF | F_DERIVED,
1728 SP_HMAC_SHA1_checksum,
1729 NULL
1730 };
1731
1732 static struct checksum_type checksum_hmac_md5 = {
1733 CKSUMTYPE_HMAC_MD5,
1734 "hmac-md5",
1735 64,
1736 16,
1737 F_KEYED | F_CPROOF,
1738 HMAC_MD5_checksum,
1739 NULL
1740 };
1741
1742 static struct checksum_type checksum_hmac_md5_enc = {
1743 CKSUMTYPE_HMAC_MD5_ENC,
1744 "hmac-md5-enc",
1745 64,
1746 16,
1747 F_KEYED | F_CPROOF | F_PSEUDO,
1748 HMAC_MD5_checksum_enc,
1749 NULL
1750 };
1751
1752 static struct checksum_type *checksum_types[] = {
1753 &checksum_none,
1754 &checksum_crc32,
1755 &checksum_rsa_md4,
1756 &checksum_rsa_md4_des,
1757 #if 0
1758 &checksum_des_mac,
1759 &checksum_des_mac_k,
1760 &checksum_rsa_md4_des_k,
1761 #endif
1762 &checksum_rsa_md5,
1763 &checksum_rsa_md5_des,
1764 &checksum_rsa_md5_des3,
1765 &checksum_sha1,
1766 &checksum_hmac_sha1_des3,
1767 &checksum_hmac_sha1_aes128,
1768 &checksum_hmac_sha1_aes256,
1769 &checksum_hmac_md5,
1770 &checksum_hmac_md5_enc
1771 };
1772
1773 static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
1774
1775 static struct checksum_type *
1776 _find_checksum(krb5_cksumtype type)
1777 {
1778 int i;
1779 for(i = 0; i < num_checksums; i++)
1780 if(checksum_types[i]->type == type)
1781 return checksum_types[i];
1782 return NULL;
1783 }
1784
1785 static krb5_error_code
1786 get_checksum_key(krb5_context context,
1787 krb5_crypto crypto,
1788 unsigned usage, /* not krb5_key_usage */
1789 struct checksum_type *ct,
1790 struct key_data **key)
1791 {
1792 krb5_error_code ret = 0;
1793
1794 if(ct->flags & F_DERIVED)
1795 ret = _get_derived_key(context, crypto, usage, key);
1796 else if(ct->flags & F_VARIANT) {
1797 int i;
1798
1799 *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
1800 if(*key == NULL) {
1801 krb5_set_error_string(context, "malloc: out of memory");
1802 return ENOMEM;
1803 }
1804 ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
1805 if(ret)
1806 return ret;
1807 for(i = 0; i < (*key)->key->keyvalue.length; i++)
1808 ((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
1809 } else {
1810 *key = &crypto->key;
1811 }
1812 if(ret == 0)
1813 ret = _key_schedule(context, *key);
1814 return ret;
1815 }
1816
1817 static krb5_error_code
1818 create_checksum (krb5_context context,
1819 struct checksum_type *ct,
1820 krb5_crypto crypto,
1821 unsigned usage,
1822 void *data,
1823 size_t len,
1824 Checksum *result)
1825 {
1826 krb5_error_code ret;
1827 struct key_data *dkey;
1828 int keyed_checksum;
1829
1830 if (ct->flags & F_DISABLED) {
1831 krb5_clear_error_string (context);
1832 return KRB5_PROG_SUMTYPE_NOSUPP;
1833 }
1834 keyed_checksum = (ct->flags & F_KEYED) != 0;
1835 if(keyed_checksum && crypto == NULL) {
1836 krb5_set_error_string (context, "Checksum type %s is keyed "
1837 "but no crypto context (key) was passed in",
1838 ct->name);
1839 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1840 }
1841 if(keyed_checksum) {
1842 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1843 if (ret)
1844 return ret;
1845 } else
1846 dkey = NULL;
1847 result->cksumtype = ct->type;
1848 ret = krb5_data_alloc(&result->checksum, ct->checksumsize);
1849 if (ret)
1850 return (ret);
1851 (*ct->checksum)(context, dkey, data, len, usage, result);
1852 return 0;
1853 }
1854
1855 static int
1856 arcfour_checksum_p(struct checksum_type *ct, krb5_crypto crypto)
1857 {
1858 return (ct->type == CKSUMTYPE_HMAC_MD5) &&
1859 (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
1860 }
1861
1862 krb5_error_code KRB5_LIB_FUNCTION
1863 krb5_create_checksum(krb5_context context,
1864 krb5_crypto crypto,
1865 krb5_key_usage usage,
1866 int type,
1867 void *data,
1868 size_t len,
1869 Checksum *result)
1870 {
1871 struct checksum_type *ct = NULL;
1872 unsigned keyusage;
1873
1874 /* type 0 -> pick from crypto */
1875 if (type) {
1876 ct = _find_checksum(type);
1877 } else if (crypto) {
1878 ct = crypto->et->keyed_checksum;
1879 if (ct == NULL)
1880 ct = crypto->et->checksum;
1881 }
1882
1883 if(ct == NULL) {
1884 krb5_set_error_string (context, "checksum type %d not supported",
1885 type);
1886 return KRB5_PROG_SUMTYPE_NOSUPP;
1887 }
1888
1889 if (arcfour_checksum_p(ct, crypto)) {
1890 keyusage = usage;
1891 usage2arcfour(context, &keyusage);
1892 } else
1893 keyusage = CHECKSUM_USAGE(usage);
1894
1895 return create_checksum(context, ct, crypto, keyusage,
1896 data, len, result);
1897 }
1898
1899 static krb5_error_code
1900 verify_checksum(krb5_context context,
1901 krb5_crypto crypto,
1902 unsigned usage, /* not krb5_key_usage */
1903 void *data,
1904 size_t len,
1905 Checksum *cksum)
1906 {
1907 krb5_error_code ret;
1908 struct key_data *dkey;
1909 int keyed_checksum;
1910 Checksum c;
1911 struct checksum_type *ct;
1912
1913 ct = _find_checksum(cksum->cksumtype);
1914 if (ct == NULL || (ct->flags & F_DISABLED)) {
1915 krb5_set_error_string (context, "checksum type %d not supported",
1916 cksum->cksumtype);
1917 return KRB5_PROG_SUMTYPE_NOSUPP;
1918 }
1919 if(ct->checksumsize != cksum->checksum.length) {
1920 krb5_clear_error_string (context);
1921 return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
1922 }
1923 keyed_checksum = (ct->flags & F_KEYED) != 0;
1924 if(keyed_checksum && crypto == NULL) {
1925 krb5_set_error_string (context, "Checksum type %s is keyed "
1926 "but no crypto context (key) was passed in",
1927 ct->name);
1928 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1929 }
1930 if(keyed_checksum)
1931 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1932 else
1933 dkey = NULL;
1934 if(ct->verify)
1935 return (*ct->verify)(context, dkey, data, len, usage, cksum);
1936
1937 ret = krb5_data_alloc (&c.checksum, ct->checksumsize);
1938 if (ret)
1939 return ret;
1940
1941 (*ct->checksum)(context, dkey, data, len, usage, &c);
1942
1943 if(c.checksum.length != cksum->checksum.length ||
1944 memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
1945 krb5_clear_error_string (context);
1946 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1947 } else {
1948 ret = 0;
1949 }
1950 krb5_data_free (&c.checksum);
1951 return ret;
1952 }
1953
1954 krb5_error_code KRB5_LIB_FUNCTION
1955 krb5_verify_checksum(krb5_context context,
1956 krb5_crypto crypto,
1957 krb5_key_usage usage,
1958 void *data,
1959 size_t len,
1960 Checksum *cksum)
1961 {
1962 struct checksum_type *ct;
1963 unsigned keyusage;
1964
1965 ct = _find_checksum(cksum->cksumtype);
1966 if(ct == NULL) {
1967 krb5_set_error_string (context, "checksum type %d not supported",
1968 cksum->cksumtype);
1969 return KRB5_PROG_SUMTYPE_NOSUPP;
1970 }
1971
1972 if (arcfour_checksum_p(ct, crypto)) {
1973 keyusage = usage;
1974 usage2arcfour(context, &keyusage);
1975 } else
1976 keyusage = CHECKSUM_USAGE(usage);
1977
1978 return verify_checksum(context, crypto, keyusage,
1979 data, len, cksum);
1980 }
1981
1982 krb5_error_code KRB5_LIB_FUNCTION
1983 krb5_crypto_get_checksum_type(krb5_context context,
1984 krb5_crypto crypto,
1985 krb5_cksumtype *type)
1986 {
1987 struct checksum_type *ct = NULL;
1988
1989 if (crypto != NULL) {
1990 ct = crypto->et->keyed_checksum;
1991 if (ct == NULL)
1992 ct = crypto->et->checksum;
1993 }
1994
1995 if (ct == NULL) {
1996 krb5_set_error_string (context, "checksum type not found");
1997 return KRB5_PROG_SUMTYPE_NOSUPP;
1998 }
1999
2000 *type = ct->type;
2001
2002 return 0;
2003 }
2004
2005
2006 krb5_error_code KRB5_LIB_FUNCTION
2007 krb5_checksumsize(krb5_context context,
2008 krb5_cksumtype type,
2009 size_t *size)
2010 {
2011 struct checksum_type *ct = _find_checksum(type);
2012 if(ct == NULL) {
2013 krb5_set_error_string (context, "checksum type %d not supported",
2014 type);
2015 return KRB5_PROG_SUMTYPE_NOSUPP;
2016 }
2017 *size = ct->checksumsize;
2018 return 0;
2019 }
2020
2021 krb5_boolean KRB5_LIB_FUNCTION
2022 krb5_checksum_is_keyed(krb5_context context,
2023 krb5_cksumtype type)
2024 {
2025 struct checksum_type *ct = _find_checksum(type);
2026 if(ct == NULL) {
2027 if (context)
2028 krb5_set_error_string (context, "checksum type %d not supported",
2029 type);
2030 return KRB5_PROG_SUMTYPE_NOSUPP;
2031 }
2032 return ct->flags & F_KEYED;
2033 }
2034
2035 krb5_boolean KRB5_LIB_FUNCTION
2036 krb5_checksum_is_collision_proof(krb5_context context,
2037 krb5_cksumtype type)
2038 {
2039 struct checksum_type *ct = _find_checksum(type);
2040 if(ct == NULL) {
2041 if (context)
2042 krb5_set_error_string (context, "checksum type %d not supported",
2043 type);
2044 return KRB5_PROG_SUMTYPE_NOSUPP;
2045 }
2046 return ct->flags & F_CPROOF;
2047 }
2048
2049 krb5_error_code KRB5_LIB_FUNCTION
2050 krb5_checksum_disable(krb5_context context,
2051 krb5_cksumtype type)
2052 {
2053 struct checksum_type *ct = _find_checksum(type);
2054 if(ct == NULL) {
2055 if (context)
2056 krb5_set_error_string (context, "checksum type %d not supported",
2057 type);
2058 return KRB5_PROG_SUMTYPE_NOSUPP;
2059 }
2060 ct->flags |= F_DISABLED;
2061 return 0;
2062 }
2063
2064 /************************************************************
2065 * *
2066 ************************************************************/
2067
2068 static krb5_error_code
2069 NULL_encrypt(krb5_context context,
2070 struct key_data *key,
2071 void *data,
2072 size_t len,
2073 krb5_boolean encryptp,
2074 int usage,
2075 void *ivec)
2076 {
2077 return 0;
2078 }
2079
2080 static krb5_error_code
2081 DES_CBC_encrypt_null_ivec(krb5_context context,
2082 struct key_data *key,
2083 void *data,
2084 size_t len,
2085 krb5_boolean encryptp,
2086 int usage,
2087 void *ignore_ivec)
2088 {
2089 DES_cblock ivec;
2090 DES_key_schedule *s = key->schedule->data;
2091 memset(&ivec, 0, sizeof(ivec));
2092 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2093 return 0;
2094 }
2095
2096 static krb5_error_code
2097 DES_CBC_encrypt_key_ivec(krb5_context context,
2098 struct key_data *key,
2099 void *data,
2100 size_t len,
2101 krb5_boolean encryptp,
2102 int usage,
2103 void *ignore_ivec)
2104 {
2105 DES_cblock ivec;
2106 DES_key_schedule *s = key->schedule->data;
2107 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2108 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2109 return 0;
2110 }
2111
2112 static krb5_error_code
2113 DES3_CBC_encrypt(krb5_context context,
2114 struct key_data *key,
2115 void *data,
2116 size_t len,
2117 krb5_boolean encryptp,
2118 int usage,
2119 void *ivec)
2120 {
2121 DES_cblock local_ivec;
2122 DES_key_schedule *s = key->schedule->data;
2123 if(ivec == NULL) {
2124 ivec = &local_ivec;
2125 memset(local_ivec, 0, sizeof(local_ivec));
2126 }
2127 DES_ede3_cbc_encrypt(data, data, len, &s[0], &s[1], &s[2], ivec, encryptp);
2128 return 0;
2129 }
2130
2131 static krb5_error_code
2132 DES_CFB64_encrypt_null_ivec(krb5_context context,
2133 struct key_data *key,
2134 void *data,
2135 size_t len,
2136 krb5_boolean encryptp,
2137 int usage,
2138 void *ignore_ivec)
2139 {
2140 DES_cblock ivec;
2141 int num = 0;
2142 DES_key_schedule *s = key->schedule->data;
2143 memset(&ivec, 0, sizeof(ivec));
2144
2145 DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
2146 return 0;
2147 }
2148
2149 static krb5_error_code
2150 DES_PCBC_encrypt_key_ivec(krb5_context context,
2151 struct key_data *key,
2152 void *data,
2153 size_t len,
2154 krb5_boolean encryptp,
2155 int usage,
2156 void *ignore_ivec)
2157 {
2158 DES_cblock ivec;
2159 DES_key_schedule *s = key->schedule->data;
2160 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2161
2162 DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
2163 return 0;
2164 }
2165
2166 /*
2167 * AES draft-raeburn-krb-rijndael-krb-02
2168 */
2169
2170 void KRB5_LIB_FUNCTION
2171 _krb5_aes_cts_encrypt(const unsigned char *in, unsigned char *out,
2172 size_t len, const AES_KEY *key,
2173 unsigned char *ivec, const int encryptp)
2174 {
2175 unsigned char tmp[AES_BLOCK_SIZE];
2176 int i;
2177
2178 /*
2179 * In the framework of kerberos, the length can never be shorter
2180 * then at least one blocksize.
2181 */
2182
2183 if (encryptp) {
2184
2185 while(len > AES_BLOCK_SIZE) {
2186 for (i = 0; i < AES_BLOCK_SIZE; i++)
2187 tmp[i] = in[i] ^ ivec[i];
2188 AES_encrypt(tmp, out, key);
2189 memcpy(ivec, out, AES_BLOCK_SIZE);
2190 len -= AES_BLOCK_SIZE;
2191 in += AES_BLOCK_SIZE;
2192 out += AES_BLOCK_SIZE;
2193 }
2194
2195 for (i = 0; i < len; i++)
2196 tmp[i] = in[i] ^ ivec[i];
2197 for (; i < AES_BLOCK_SIZE; i++)
2198 tmp[i] = 0 ^ ivec[i];
2199
2200 AES_encrypt(tmp, out - AES_BLOCK_SIZE, key);
2201
2202 memcpy(out, ivec, len);
2203 memcpy(ivec, out - AES_BLOCK_SIZE, AES_BLOCK_SIZE);
2204
2205 } else {
2206 unsigned char tmp2[AES_BLOCK_SIZE];
2207 unsigned char tmp3[AES_BLOCK_SIZE];
2208
2209 while(len > AES_BLOCK_SIZE * 2) {
2210 memcpy(tmp, in, AES_BLOCK_SIZE);
2211 AES_decrypt(in, out, key);
2212 for (i = 0; i < AES_BLOCK_SIZE; i++)
2213 out[i] ^= ivec[i];
2214 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2215 len -= AES_BLOCK_SIZE;
2216 in += AES_BLOCK_SIZE;
2217 out += AES_BLOCK_SIZE;
2218 }
2219
2220 len -= AES_BLOCK_SIZE;
2221
2222 memcpy(tmp, in, AES_BLOCK_SIZE); /* save last iv */
2223 AES_decrypt(in, tmp2, key);
2224
2225 memcpy(tmp3, in + AES_BLOCK_SIZE, len);
2226 memcpy(tmp3 + len, tmp2 + len, AES_BLOCK_SIZE - len); /* xor 0 */
2227
2228 for (i = 0; i < len; i++)
2229 out[i + AES_BLOCK_SIZE] = tmp2[i] ^ tmp3[i];
2230
2231 AES_decrypt(tmp3, out, key);
2232 for (i = 0; i < AES_BLOCK_SIZE; i++)
2233 out[i] ^= ivec[i];
2234 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2235 }
2236 }
2237
2238 static krb5_error_code
2239 AES_CTS_encrypt(krb5_context context,
2240 struct key_data *key,
2241 void *data,
2242 size_t len,
2243 krb5_boolean encryptp,
2244 int usage,
2245 void *ivec)
2246 {
2247 struct krb5_aes_schedule *aeskey = key->schedule->data;
2248 char local_ivec[AES_BLOCK_SIZE];
2249 AES_KEY *k;
2250
2251 if (encryptp)
2252 k = &aeskey->ekey;
2253 else
2254 k = &aeskey->dkey;
2255
2256 if (len < AES_BLOCK_SIZE)
2257 krb5_abortx(context, "invalid use of AES_CTS_encrypt");
2258 if (len == AES_BLOCK_SIZE) {
2259 if (encryptp)
2260 AES_encrypt(data, data, k);
2261 else
2262 AES_decrypt(data, data, k);
2263 } else {
2264 if(ivec == NULL) {
2265 memset(local_ivec, 0, sizeof(local_ivec));
2266 ivec = local_ivec;
2267 }
2268 _krb5_aes_cts_encrypt(data, data, len, k, ivec, encryptp);
2269 }
2270
2271 return 0;
2272 }
2273
2274 /*
2275 * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
2276 *
2277 * warning: not for small children
2278 */
2279
2280 static krb5_error_code
2281 ARCFOUR_subencrypt(krb5_context context,
2282 struct key_data *key,
2283 void *data,
2284 size_t len,
2285 unsigned usage,
2286 void *ivec)
2287 {
2288 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2289 Checksum k1_c, k2_c, k3_c, cksum;
2290 struct key_data ke;
2291 krb5_keyblock kb;
2292 unsigned char t[4];
2293 RC4_KEY rc4_key;
2294 unsigned char *cdata = data;
2295 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2296 krb5_error_code ret;
2297
2298 t[0] = (usage >> 0) & 0xFF;
2299 t[1] = (usage >> 8) & 0xFF;
2300 t[2] = (usage >> 16) & 0xFF;
2301 t[3] = (usage >> 24) & 0xFF;
2302
2303 k1_c.checksum.length = sizeof(k1_c_data);
2304 k1_c.checksum.data = k1_c_data;
2305
2306 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2307 if (ret)
2308 krb5_abortx(context, "hmac failed");
2309
2310 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2311
2312 k2_c.checksum.length = sizeof(k2_c_data);
2313 k2_c.checksum.data = k2_c_data;
2314
2315 ke.key = &kb;
2316 kb.keyvalue = k2_c.checksum;
2317
2318 cksum.checksum.length = 16;
2319 cksum.checksum.data = data;
2320
2321 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2322 if (ret)
2323 krb5_abortx(context, "hmac failed");
2324
2325 ke.key = &kb;
2326 kb.keyvalue = k1_c.checksum;
2327
2328 k3_c.checksum.length = sizeof(k3_c_data);
2329 k3_c.checksum.data = k3_c_data;
2330
2331 ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
2332 if (ret)
2333 krb5_abortx(context, "hmac failed");
2334
2335 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2336 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2337 memset (k1_c_data, 0, sizeof(k1_c_data));
2338 memset (k2_c_data, 0, sizeof(k2_c_data));
2339 memset (k3_c_data, 0, sizeof(k3_c_data));
2340 return 0;
2341 }
2342
2343 static krb5_error_code
2344 ARCFOUR_subdecrypt(krb5_context context,
2345 struct key_data *key,
2346 void *data,
2347 size_t len,
2348 unsigned usage,
2349 void *ivec)
2350 {
2351 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2352 Checksum k1_c, k2_c, k3_c, cksum;
2353 struct key_data ke;
2354 krb5_keyblock kb;
2355 unsigned char t[4];
2356 RC4_KEY rc4_key;
2357 unsigned char *cdata = data;
2358 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2359 unsigned char cksum_data[16];
2360 krb5_error_code ret;
2361
2362 t[0] = (usage >> 0) & 0xFF;
2363 t[1] = (usage >> 8) & 0xFF;
2364 t[2] = (usage >> 16) & 0xFF;
2365 t[3] = (usage >> 24) & 0xFF;
2366
2367 k1_c.checksum.length = sizeof(k1_c_data);
2368 k1_c.checksum.data = k1_c_data;
2369
2370 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2371 if (ret)
2372 krb5_abortx(context, "hmac failed");
2373
2374 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2375
2376 k2_c.checksum.length = sizeof(k2_c_data);
2377 k2_c.checksum.data = k2_c_data;
2378
2379 ke.key = &kb;
2380 kb.keyvalue = k1_c.checksum;
2381
2382 k3_c.checksum.length = sizeof(k3_c_data);
2383 k3_c.checksum.data = k3_c_data;
2384
2385 ret = hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
2386 if (ret)
2387 krb5_abortx(context, "hmac failed");
2388
2389 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2390 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2391
2392 ke.key = &kb;
2393 kb.keyvalue = k2_c.checksum;
2394
2395 cksum.checksum.length = 16;
2396 cksum.checksum.data = cksum_data;
2397
2398 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2399 if (ret)
2400 krb5_abortx(context, "hmac failed");
2401
2402 memset (k1_c_data, 0, sizeof(k1_c_data));
2403 memset (k2_c_data, 0, sizeof(k2_c_data));
2404 memset (k3_c_data, 0, sizeof(k3_c_data));
2405
2406 if (memcmp (cksum.checksum.data, data, 16) != 0) {
2407 krb5_clear_error_string (context);
2408 return KRB5KRB_AP_ERR_BAD_INTEGRITY;
2409 } else {
2410 return 0;
2411 }
2412 }
2413
2414 /*
2415 * convert the usage numbers used in
2416 * draft-ietf-cat-kerb-key-derivation-00.txt to the ones in
2417 * draft-brezak-win2k-krb-rc4-hmac-04.txt
2418 */
2419
2420 static krb5_error_code
2421 usage2arcfour (krb5_context context, unsigned *usage)
2422 {
2423 switch (*usage) {
2424 case KRB5_KU_AS_REP_ENC_PART : /* 3 */
2425 case KRB5_KU_TGS_REP_ENC_PART_SUB_KEY : /* 9 */
2426 *usage = 8;
2427 return 0;
2428 case KRB5_KU_USAGE_SEAL : /* 22 */
2429 *usage = 13;
2430 return 0;
2431 case KRB5_KU_USAGE_SIGN : /* 23 */
2432 *usage = 15;
2433 return 0;
2434 case KRB5_KU_USAGE_SEQ: /* 24 */
2435 *usage = 0;
2436 return 0;
2437 default :
2438 return 0;
2439 }
2440 }
2441
2442 static krb5_error_code
2443 ARCFOUR_encrypt(krb5_context context,
2444 struct key_data *key,
2445 void *data,
2446 size_t len,
2447 krb5_boolean encryptp,
2448 int usage,
2449 void *ivec)
2450 {
2451 krb5_error_code ret;
2452 unsigned keyusage = usage;
2453
2454 if((ret = usage2arcfour (context, &keyusage)) != 0)
2455 return ret;
2456
2457 if (encryptp)
2458 return ARCFOUR_subencrypt (context, key, data, len, keyusage, ivec);
2459 else
2460 return ARCFOUR_subdecrypt (context, key, data, len, keyusage, ivec);
2461 }
2462
2463
2464 /*
2465 *
2466 */
2467
2468 static krb5_error_code
2469 AES_PRF(krb5_context context,
2470 krb5_crypto crypto,
2471 const krb5_data *in,
2472 krb5_data *out)
2473 {
2474 struct checksum_type *ct = crypto->et->checksum;
2475 krb5_error_code ret;
2476 Checksum result;
2477 krb5_keyblock *derived;
2478
2479 result.cksumtype = ct->type;
2480 ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
2481 if (ret) {
2482 krb5_set_error_string(context, "out memory");
2483 return ret;
2484 }
2485
2486 (*ct->checksum)(context, NULL, in->data, in->length, 0, &result);
2487
2488 if (result.checksum.length < crypto->et->blocksize)
2489 krb5_abortx(context, "internal prf error");
2490
2491 derived = NULL;
2492 ret = krb5_derive_key(context, crypto->key.key,
2493 crypto->et->type, "prf", 3, &derived);
2494 if (ret)
2495 krb5_abortx(context, "krb5_derive_key");
2496
2497 ret = krb5_data_alloc(out, crypto->et->blocksize);
2498 if (ret)
2499 krb5_abortx(context, "malloc failed");
2500
2501 {
2502 AES_KEY key;
2503
2504 AES_set_encrypt_key(derived->keyvalue.data,
2505 crypto->et->keytype->bits, &key);
2506 AES_encrypt(result.checksum.data, out->data, &key);
2507 memset(&key, 0, sizeof(key));
2508 }
2509
2510 krb5_data_free(&result.checksum);
2511 krb5_free_keyblock(context, derived);
2512
2513 return ret;
2514 }
2515
2516 /*
2517 * these should currently be in reverse preference order.
2518 * (only relevant for !F_PSEUDO) */
2519
2520 static struct encryption_type enctype_null = {
2521 ETYPE_NULL,
2522 "null",
2523 NULL,
2524 1,
2525 1,
2526 0,
2527 &keytype_null,
2528 &checksum_none,
2529 NULL,
2530 F_DISABLED,
2531 NULL_encrypt,
2532 0,
2533 NULL
2534 };
2535 static struct encryption_type enctype_des_cbc_crc = {
2536 ETYPE_DES_CBC_CRC,
2537 "des-cbc-crc",
2538 NULL,
2539 8,
2540 8,
2541 8,
2542 &keytype_des,
2543 &checksum_crc32,
2544 NULL,
2545 0,
2546 DES_CBC_encrypt_key_ivec,
2547 0,
2548 NULL
2549 };
2550 static struct encryption_type enctype_des_cbc_md4 = {
2551 ETYPE_DES_CBC_MD4,
2552 "des-cbc-md4",
2553 NULL,
2554 8,
2555 8,
2556 8,
2557 &keytype_des,
2558 &checksum_rsa_md4,
2559 &checksum_rsa_md4_des,
2560 0,
2561 DES_CBC_encrypt_null_ivec,
2562 0,
2563 NULL
2564 };
2565 static struct encryption_type enctype_des_cbc_md5 = {
2566 ETYPE_DES_CBC_MD5,
2567 "des-cbc-md5",
2568 NULL,
2569 8,
2570 8,
2571 8,
2572 &keytype_des,
2573 &checksum_rsa_md5,
2574 &checksum_rsa_md5_des,
2575 0,
2576 DES_CBC_encrypt_null_ivec,
2577 0,
2578 NULL
2579 };
2580 static struct encryption_type enctype_arcfour_hmac_md5 = {
2581 ETYPE_ARCFOUR_HMAC_MD5,
2582 "arcfour-hmac-md5",
2583 NULL,
2584 1,
2585 1,
2586 8,
2587 &keytype_arcfour,
2588 &checksum_hmac_md5,
2589 NULL,
2590 F_SPECIAL,
2591 ARCFOUR_encrypt,
2592 0,
2593 NULL
2594 };
2595 static struct encryption_type enctype_des3_cbc_md5 = {
2596 ETYPE_DES3_CBC_MD5,
2597 "des3-cbc-md5",
2598 NULL,
2599 8,
2600 8,
2601 8,
2602 &keytype_des3,
2603 &checksum_rsa_md5,
2604 &checksum_rsa_md5_des3,
2605 0,
2606 DES3_CBC_encrypt,
2607 0,
2608 NULL
2609 };
2610 static struct encryption_type enctype_des3_cbc_sha1 = {
2611 ETYPE_DES3_CBC_SHA1,
2612 "des3-cbc-sha1",
2613 NULL,
2614 8,
2615 8,
2616 8,
2617 &keytype_des3_derived,
2618 &checksum_sha1,
2619 &checksum_hmac_sha1_des3,
2620 F_DERIVED,
2621 DES3_CBC_encrypt,
2622 0,
2623 NULL
2624 };
2625 static struct encryption_type enctype_old_des3_cbc_sha1 = {
2626 ETYPE_OLD_DES3_CBC_SHA1,
2627 "old-des3-cbc-sha1",
2628 NULL,
2629 8,
2630 8,
2631 8,
2632 &keytype_des3,
2633 &checksum_sha1,
2634 &checksum_hmac_sha1_des3,
2635 0,
2636 DES3_CBC_encrypt,
2637 0,
2638 NULL
2639 };
2640 static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
2641 ETYPE_AES128_CTS_HMAC_SHA1_96,
2642 "aes128-cts-hmac-sha1-96",
2643 NULL,
2644 16,
2645 1,
2646 16,
2647 &keytype_aes128,
2648 &checksum_sha1,
2649 &checksum_hmac_sha1_aes128,
2650 F_DERIVED,
2651 AES_CTS_encrypt,
2652 16,
2653 AES_PRF
2654 };
2655 static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
2656 ETYPE_AES256_CTS_HMAC_SHA1_96,
2657 "aes256-cts-hmac-sha1-96",
2658 NULL,
2659 16,
2660 1,
2661 16,
2662 &keytype_aes256,
2663 &checksum_sha1,
2664 &checksum_hmac_sha1_aes256,
2665 F_DERIVED,
2666 AES_CTS_encrypt,
2667 16,
2668 AES_PRF
2669 };
2670 static struct encryption_type enctype_des_cbc_none = {
2671 ETYPE_DES_CBC_NONE,
2672 "des-cbc-none",
2673 NULL,
2674 8,
2675 8,
2676 0,
2677 &keytype_des,
2678 &checksum_none,
2679 NULL,
2680 F_PSEUDO,
2681 DES_CBC_encrypt_null_ivec,
2682 0,
2683 NULL
2684 };
2685 static struct encryption_type enctype_des_cfb64_none = {
2686 ETYPE_DES_CFB64_NONE,
2687 "des-cfb64-none",
2688 NULL,
2689 1,
2690 1,
2691 0,
2692 &keytype_des,
2693 &checksum_none,
2694 NULL,
2695 F_PSEUDO,
2696 DES_CFB64_encrypt_null_ivec,
2697 0,
2698 NULL
2699 };
2700 static struct encryption_type enctype_des_pcbc_none = {
2701 ETYPE_DES_PCBC_NONE,
2702 "des-pcbc-none",
2703 NULL,
2704 8,
2705 8,
2706 0,
2707 &keytype_des,
2708 &checksum_none,
2709 NULL,
2710 F_PSEUDO,
2711 DES_PCBC_encrypt_key_ivec,
2712 0,
2713 NULL
2714 };
2715 static struct encryption_type enctype_des3_cbc_none = {
2716 ETYPE_DES3_CBC_NONE,
2717 "des3-cbc-none",
2718 NULL,
2719 8,
2720 8,
2721 0,
2722 &keytype_des3_derived,
2723 &checksum_none,
2724 NULL,
2725 F_PSEUDO,
2726 DES3_CBC_encrypt,
2727 0,
2728 NULL
2729 };
2730
2731 static struct encryption_type *etypes[] = {
2732 &enctype_null,
2733 &enctype_des_cbc_crc,
2734 &enctype_des_cbc_md4,
2735 &enctype_des_cbc_md5,
2736 &enctype_arcfour_hmac_md5,
2737 &enctype_des3_cbc_md5,
2738 &enctype_des3_cbc_sha1,
2739 &enctype_old_des3_cbc_sha1,
2740 &enctype_aes128_cts_hmac_sha1,
2741 &enctype_aes256_cts_hmac_sha1,
2742 &enctype_des_cbc_none,
2743 &enctype_des_cfb64_none,
2744 &enctype_des_pcbc_none,
2745 &enctype_des3_cbc_none
2746 };
2747
2748 static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
2749
2750
2751 static struct encryption_type *
2752 _find_enctype(krb5_enctype type)
2753 {
2754 int i;
2755 for(i = 0; i < num_etypes; i++)
2756 if(etypes[i]->type == type)
2757 return etypes[i];
2758 return NULL;
2759 }
2760
2761
2762 krb5_error_code KRB5_LIB_FUNCTION
2763 krb5_enctype_to_string(krb5_context context,
2764 krb5_enctype etype,
2765 char **string)
2766 {
2767 struct encryption_type *e;
2768 e = _find_enctype(etype);
2769 if(e == NULL) {
2770 krb5_set_error_string (context, "encryption type %d not supported",
2771 etype);
2772 *string = NULL;
2773 return KRB5_PROG_ETYPE_NOSUPP;
2774 }
2775 *string = strdup(e->name);
2776 if(*string == NULL) {
2777 krb5_set_error_string(context, "malloc: out of memory");
2778 return ENOMEM;
2779 }
2780 return 0;
2781 }
2782
2783 krb5_error_code KRB5_LIB_FUNCTION
2784 krb5_string_to_enctype(krb5_context context,
2785 const char *string,
2786 krb5_enctype *etype)
2787 {
2788 int i;
2789 for(i = 0; i < num_etypes; i++)
2790 if(strcasecmp(etypes[i]->name, string) == 0){
2791 *etype = etypes[i]->type;
2792 return 0;
2793 }
2794 krb5_set_error_string (context, "encryption type %s not supported",
2795 string);
2796 return KRB5_PROG_ETYPE_NOSUPP;
2797 }
2798
2799 krb5_error_code KRB5_LIB_FUNCTION
2800 _krb5_enctype_to_oid(krb5_context context,
2801 krb5_enctype etype,
2802 heim_oid *oid)
2803 {
2804 struct encryption_type *et = _find_enctype(etype);
2805 if(et == NULL) {
2806 krb5_set_error_string (context, "encryption type %d not supported",
2807 etype);
2808 return KRB5_PROG_ETYPE_NOSUPP;
2809 }
2810 if(et->oid == NULL) {
2811 krb5_set_error_string (context, "%s have not oid", et->name);
2812 return KRB5_PROG_ETYPE_NOSUPP;
2813 }
2814 krb5_clear_error_string(context);
2815 return der_copy_oid(et->oid, oid);
2816 }
2817
2818 krb5_error_code KRB5_LIB_FUNCTION
2819 _krb5_oid_to_enctype(krb5_context context,
2820 const heim_oid *oid,
2821 krb5_enctype *etype)
2822 {
2823 int i;
2824 for(i = 0; i < num_etypes; i++) {
2825 if(etypes[i]->oid && der_heim_oid_cmp(etypes[i]->oid, oid) == 0) {
2826 *etype = etypes[i]->type;
2827 return 0;
2828 }
2829 }
2830 krb5_set_error_string(context, "enctype for oid not supported");
2831 return KRB5_PROG_ETYPE_NOSUPP;
2832 }
2833
2834 krb5_error_code KRB5_LIB_FUNCTION
2835 krb5_enctype_to_keytype(krb5_context context,
2836 krb5_enctype etype,
2837 krb5_keytype *keytype)
2838 {
2839 struct encryption_type *e = _find_enctype(etype);
2840 if(e == NULL) {
2841 krb5_set_error_string (context, "encryption type %d not supported",
2842 etype);
2843 return KRB5_PROG_ETYPE_NOSUPP;
2844 }
2845 *keytype = e->keytype->type; /* XXX */
2846 return 0;
2847 }
2848
2849 #if 0
2850 krb5_error_code KRB5_LIB_FUNCTION
2851 krb5_keytype_to_enctype(krb5_context context,
2852 krb5_keytype keytype,
2853 krb5_enctype *etype)
2854 {
2855 struct key_type *kt = _find_keytype(keytype);
2856 krb5_warnx(context, "krb5_keytype_to_enctype(%u)", keytype);
2857 if(kt == NULL)
2858 return KRB5_PROG_KEYTYPE_NOSUPP;
2859 *etype = kt->best_etype;
2860 return 0;
2861 }
2862 #endif
2863
2864 krb5_error_code KRB5_LIB_FUNCTION
2865 krb5_keytype_to_enctypes (krb5_context context,
2866 krb5_keytype keytype,
2867 unsigned *len,
2868 krb5_enctype **val)
2869 {
2870 int i;
2871 unsigned n = 0;
2872 krb5_enctype *ret;
2873
2874 for (i = num_etypes - 1; i >= 0; --i) {
2875 if (etypes[i]->keytype->type == keytype
2876 && !(etypes[i]->flags & F_PSEUDO))
2877 ++n;
2878 }
2879 ret = malloc(n * sizeof(*ret));
2880 if (ret == NULL && n != 0) {
2881 krb5_set_error_string(context, "malloc: out of memory");
2882 return ENOMEM;
2883 }
2884 n = 0;
2885 for (i = num_etypes - 1; i >= 0; --i) {
2886 if (etypes[i]->keytype->type == keytype
2887 && !(etypes[i]->flags & F_PSEUDO))
2888 ret[n++] = etypes[i]->type;
2889 }
2890 *len = n;
2891 *val = ret;
2892 return 0;
2893 }
2894
2895 /*
2896 * First take the configured list of etypes for `keytype' if available,
2897 * else, do `krb5_keytype_to_enctypes'.
2898 */
2899
2900 krb5_error_code KRB5_LIB_FUNCTION
2901 krb5_keytype_to_enctypes_default (krb5_context context,
2902 krb5_keytype keytype,
2903 unsigned *len,
2904 krb5_enctype **val)
2905 {
2906 unsigned int i, n;
2907 krb5_enctype *ret;
2908
2909 if (keytype != KEYTYPE_DES || context->etypes_des == NULL)
2910 return krb5_keytype_to_enctypes (context, keytype, len, val);
2911
2912 for (n = 0; context->etypes_des[n]; ++n)
2913 ;
2914 ret = malloc (n * sizeof(*ret));
2915 if (ret == NULL && n != 0) {
2916 krb5_set_error_string(context, "malloc: out of memory");
2917 return ENOMEM;
2918 }
2919 for (i = 0; i < n; ++i)
2920 ret[i] = context->etypes_des[i];
2921 *len = n;
2922 *val = ret;
2923 return 0;
2924 }
2925
2926 krb5_error_code KRB5_LIB_FUNCTION
2927 krb5_enctype_valid(krb5_context context,
2928 krb5_enctype etype)
2929 {
2930 struct encryption_type *e = _find_enctype(etype);
2931 if(e == NULL) {
2932 krb5_set_error_string (context, "encryption type %d not supported",
2933 etype);
2934 return KRB5_PROG_ETYPE_NOSUPP;
2935 }
2936 if (e->flags & F_DISABLED) {
2937 krb5_set_error_string (context, "encryption type %s is disabled",
2938 e->name);
2939 return KRB5_PROG_ETYPE_NOSUPP;
2940 }
2941 return 0;
2942 }
2943
2944 krb5_error_code KRB5_LIB_FUNCTION
2945 krb5_cksumtype_valid(krb5_context context,
2946 krb5_cksumtype ctype)
2947 {
2948 struct checksum_type *c = _find_checksum(ctype);
2949 if (c == NULL) {
2950 krb5_set_error_string (context, "checksum type %d not supported",
2951 ctype);
2952 return KRB5_PROG_SUMTYPE_NOSUPP;
2953 }
2954 if (c->flags & F_DISABLED) {
2955 krb5_set_error_string (context, "checksum type %s is disabled",
2956 c->name);
2957 return KRB5_PROG_SUMTYPE_NOSUPP;
2958 }
2959 return 0;
2960 }
2961
2962
2963 /* if two enctypes have compatible keys */
2964 krb5_boolean KRB5_LIB_FUNCTION
2965 krb5_enctypes_compatible_keys(krb5_context context,
2966 krb5_enctype etype1,
2967 krb5_enctype etype2)
2968 {
2969 struct encryption_type *e1 = _find_enctype(etype1);
2970 struct encryption_type *e2 = _find_enctype(etype2);
2971 return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
2972 }
2973
2974 static krb5_boolean
2975 derived_crypto(krb5_context context,
2976 krb5_crypto crypto)
2977 {
2978 return (crypto->et->flags & F_DERIVED) != 0;
2979 }
2980
2981 static krb5_boolean
2982 special_crypto(krb5_context context,
2983 krb5_crypto crypto)
2984 {
2985 return (crypto->et->flags & F_SPECIAL) != 0;
2986 }
2987
2988 #define CHECKSUMSIZE(C) ((C)->checksumsize)
2989 #define CHECKSUMTYPE(C) ((C)->type)
2990
2991 static krb5_error_code
2992 encrypt_internal_derived(krb5_context context,
2993 krb5_crypto crypto,
2994 unsigned usage,
2995 const void *data,
2996 size_t len,
2997 krb5_data *result,
2998 void *ivec)
2999 {
3000 size_t sz, block_sz, checksum_sz, total_sz;
3001 Checksum cksum;
3002 unsigned char *p, *q;
3003 krb5_error_code ret;
3004 struct key_data *dkey;
3005 const struct encryption_type *et = crypto->et;
3006
3007 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3008
3009 sz = et->confoundersize + len;
3010 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3011 total_sz = block_sz + checksum_sz;
3012 p = calloc(1, total_sz);
3013 if(p == NULL) {
3014 krb5_set_error_string(context, "malloc: out of memory");
3015 return ENOMEM;
3016 }
3017
3018 q = p;
3019 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3020 q += et->confoundersize;
3021 memcpy(q, data, len);
3022
3023 ret = create_checksum(context,
3024 et->keyed_checksum,
3025 crypto,
3026 INTEGRITY_USAGE(usage),
3027 p,
3028 block_sz,
3029 &cksum);
3030 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3031 free_Checksum (&cksum);
3032 krb5_clear_error_string (context);
3033 ret = KRB5_CRYPTO_INTERNAL;
3034 }
3035 if(ret)
3036 goto fail;
3037 memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
3038 free_Checksum (&cksum);
3039 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3040 if(ret)
3041 goto fail;
3042 ret = _key_schedule(context, dkey);
3043 if(ret)
3044 goto fail;
3045 #ifdef CRYPTO_DEBUG
3046 krb5_crypto_debug(context, 1, block_sz, dkey->key);
3047 #endif
3048 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
3049 if (ret)
3050 goto fail;
3051 result->data = p;
3052 result->length = total_sz;
3053 return 0;
3054 fail:
3055 memset(p, 0, total_sz);
3056 free(p);
3057 return ret;
3058 }
3059
3060
3061 static krb5_error_code
3062 encrypt_internal(krb5_context context,
3063 krb5_crypto crypto,
3064 const void *data,
3065 size_t len,
3066 krb5_data *result,
3067 void *ivec)
3068 {
3069 size_t sz, block_sz, checksum_sz;
3070 Checksum cksum;
3071 unsigned char *p, *q;
3072 krb5_error_code ret;
3073 const struct encryption_type *et = crypto->et;
3074
3075 checksum_sz = CHECKSUMSIZE(et->checksum);
3076
3077 sz = et->confoundersize + checksum_sz + len;
3078 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3079 p = calloc(1, block_sz);
3080 if(p == NULL) {
3081 krb5_set_error_string(context, "malloc: out of memory");
3082 return ENOMEM;
3083 }
3084
3085 q = p;
3086 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3087 q += et->confoundersize;
3088 memset(q, 0, checksum_sz);
3089 q += checksum_sz;
3090 memcpy(q, data, len);
3091
3092 ret = create_checksum(context,
3093 et->checksum,
3094 crypto,
3095 0,
3096 p,
3097 block_sz,
3098 &cksum);
3099 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3100 krb5_clear_error_string (context);
3101 free_Checksum(&cksum);
3102 ret = KRB5_CRYPTO_INTERNAL;
3103 }
3104 if(ret)
3105 goto fail;
3106 memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
3107 free_Checksum(&cksum);
3108 ret = _key_schedule(context, &crypto->key);
3109 if(ret)
3110 goto fail;
3111 #ifdef CRYPTO_DEBUG
3112 krb5_crypto_debug(context, 1, block_sz, crypto->key.key);
3113 #endif
3114 ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
3115 if (ret) {
3116 memset(p, 0, block_sz);
3117 free(p);
3118 return ret;
3119 }
3120 result->data = p;
3121 result->length = block_sz;
3122 return 0;
3123 fail:
3124 memset(p, 0, block_sz);
3125 free(p);
3126 return ret;
3127 }
3128
3129 static krb5_error_code
3130 encrypt_internal_special(krb5_context context,
3131 krb5_crypto crypto,
3132 int usage,
3133 const void *data,
3134 size_t len,
3135 krb5_data *result,
3136 void *ivec)
3137 {
3138 struct encryption_type *et = crypto->et;
3139 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3140 size_t sz = len + cksum_sz + et->confoundersize;
3141 char *tmp, *p;
3142 krb5_error_code ret;
3143
3144 tmp = malloc (sz);
3145 if (tmp == NULL) {
3146 krb5_set_error_string(context, "malloc: out of memory");
3147 return ENOMEM;
3148 }
3149 p = tmp;
3150 memset (p, 0, cksum_sz);
3151 p += cksum_sz;
3152 krb5_generate_random_block(p, et->confoundersize);
3153 p += et->confoundersize;
3154 memcpy (p, data, len);
3155 ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
3156 if (ret) {
3157 memset(tmp, 0, sz);
3158 free(tmp);
3159 return ret;
3160 }
3161 result->data = tmp;
3162 result->length = sz;
3163 return 0;
3164 }
3165
3166 static krb5_error_code
3167 decrypt_internal_derived(krb5_context context,
3168 krb5_crypto crypto,
3169 unsigned usage,
3170 void *data,
3171 size_t len,
3172 krb5_data *result,
3173 void *ivec)
3174 {
3175 size_t checksum_sz;
3176 Checksum cksum;
3177 unsigned char *p;
3178 krb5_error_code ret;
3179 struct key_data *dkey;
3180 struct encryption_type *et = crypto->et;
3181 unsigned long l;
3182
3183 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3184 if (len < checksum_sz + et->confoundersize) {
3185 krb5_set_error_string(context, "Encrypted data shorter then "
3186 "checksum + confunder");
3187 return KRB5_BAD_MSIZE;
3188 }
3189
3190 if (((len - checksum_sz) % et->padsize) != 0) {
3191 krb5_clear_error_string(context);
3192 return KRB5_BAD_MSIZE;
3193 }
3194
3195 p = malloc(len);
3196 if(len != 0 && p == NULL) {
3197 krb5_set_error_string(context, "malloc: out of memory");
3198 return ENOMEM;
3199 }
3200 memcpy(p, data, len);
3201
3202 len -= checksum_sz;
3203
3204 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3205 if(ret) {
3206 free(p);
3207 return ret;
3208 }
3209 ret = _key_schedule(context, dkey);
3210 if(ret) {
3211 free(p);
3212 return ret;
3213 }
3214 #ifdef CRYPTO_DEBUG
3215 krb5_crypto_debug(context, 0, len, dkey->key);
3216 #endif
3217 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3218 if (ret) {
3219 free(p);
3220 return ret;
3221 }
3222
3223 cksum.checksum.data = p + len;
3224 cksum.checksum.length = checksum_sz;
3225 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3226
3227 ret = verify_checksum(context,
3228 crypto,
3229 INTEGRITY_USAGE(usage),
3230 p,
3231 len,
3232 &cksum);
3233 if(ret) {
3234 free(p);
3235 return ret;
3236 }
3237 l = len - et->confoundersize;
3238 memmove(p, p + et->confoundersize, l);
3239 result->data = realloc(p, l);
3240 if(result->data == NULL && l != 0) {
3241 free(p);
3242 krb5_set_error_string(context, "malloc: out of memory");
3243 return ENOMEM;
3244 }
3245 result->length = l;
3246 return 0;
3247 }
3248
3249 static krb5_error_code
3250 decrypt_internal(krb5_context context,
3251 krb5_crypto crypto,
3252 void *data,
3253 size_t len,
3254 krb5_data *result,
3255 void *ivec)
3256 {
3257 krb5_error_code ret;
3258 unsigned char *p;
3259 Checksum cksum;
3260 size_t checksum_sz, l;
3261 struct encryption_type *et = crypto->et;
3262
3263 if ((len % et->padsize) != 0) {
3264 krb5_clear_error_string(context);
3265 return KRB5_BAD_MSIZE;
3266 }
3267
3268 checksum_sz = CHECKSUMSIZE(et->checksum);
3269 p = malloc(len);
3270 if(len != 0 && p == NULL) {
3271 krb5_set_error_string(context, "malloc: out of memory");
3272 return ENOMEM;
3273 }
3274 memcpy(p, data, len);
3275
3276 ret = _key_schedule(context, &crypto->key);
3277 if(ret) {
3278 free(p);
3279 return ret;
3280 }
3281 #ifdef CRYPTO_DEBUG
3282 krb5_crypto_debug(context, 0, len, crypto->key.key);
3283 #endif
3284 ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
3285 if (ret) {
3286 free(p);
3287 return ret;
3288 }
3289 ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
3290 if(ret) {
3291 free(p);
3292 return ret;
3293 }
3294 memset(p + et->confoundersize, 0, checksum_sz);
3295 cksum.cksumtype = CHECKSUMTYPE(et->checksum);
3296 ret = verify_checksum(context, NULL, 0, p, len, &cksum);
3297 free_Checksum(&cksum);
3298 if(ret) {
3299 free(p);
3300 return ret;
3301 }
3302 l = len - et->confoundersize - checksum_sz;
3303 memmove(p, p + et->confoundersize + checksum_sz, l);
3304 result->data = realloc(p, l);
3305 if(result->data == NULL && l != 0) {
3306 free(p);
3307 krb5_set_error_string(context, "malloc: out of memory");
3308 return ENOMEM;
3309 }
3310 result->length = l;
3311 return 0;
3312 }
3313
3314 static krb5_error_code
3315 decrypt_internal_special(krb5_context context,
3316 krb5_crypto crypto,
3317 int usage,
3318 void *data,
3319 size_t len,
3320 krb5_data *result,
3321 void *ivec)
3322 {
3323 struct encryption_type *et = crypto->et;
3324 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3325 size_t sz = len - cksum_sz - et->confoundersize;
3326 unsigned char *p;
3327 krb5_error_code ret;
3328
3329 if ((len % et->padsize) != 0) {
3330 krb5_clear_error_string(context);
3331 return KRB5_BAD_MSIZE;
3332 }
3333
3334 p = malloc (len);
3335 if (p == NULL) {
3336 krb5_set_error_string(context, "malloc: out of memory");
3337 return ENOMEM;
3338 }
3339 memcpy(p, data, len);
3340
3341 ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
3342 if (ret) {
3343 free(p);
3344 return ret;
3345 }
3346
3347 memmove (p, p + cksum_sz + et->confoundersize, sz);
3348 result->data = realloc(p, sz);
3349 if(result->data == NULL && sz != 0) {
3350 free(p);
3351 krb5_set_error_string(context, "malloc: out of memory");
3352 return ENOMEM;
3353 }
3354 result->length = sz;
3355 return 0;
3356 }
3357
3358
3359 krb5_error_code KRB5_LIB_FUNCTION
3360 krb5_encrypt_ivec(krb5_context context,
3361 krb5_crypto crypto,
3362 unsigned usage,
3363 const void *data,
3364 size_t len,
3365 krb5_data *result,
3366 void *ivec)
3367 {
3368 if(derived_crypto(context, crypto))
3369 return encrypt_internal_derived(context, crypto, usage,
3370 data, len, result, ivec);
3371 else if (special_crypto(context, crypto))
3372 return encrypt_internal_special (context, crypto, usage,
3373 data, len, result, ivec);
3374 else
3375 return encrypt_internal(context, crypto, data, len, result, ivec);
3376 }
3377
3378 krb5_error_code KRB5_LIB_FUNCTION
3379 krb5_encrypt(krb5_context context,
3380 krb5_crypto crypto,
3381 unsigned usage,
3382 const void *data,
3383 size_t len,
3384 krb5_data *result)
3385 {
3386 return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
3387 }
3388
3389 krb5_error_code KRB5_LIB_FUNCTION
3390 krb5_encrypt_EncryptedData(krb5_context context,
3391 krb5_crypto crypto,
3392 unsigned usage,
3393 void *data,
3394 size_t len,
3395 int kvno,
3396 EncryptedData *result)
3397 {
3398 result->etype = CRYPTO_ETYPE(crypto);
3399 if(kvno){
3400 ALLOC(result->kvno, 1);
3401 *result->kvno = kvno;
3402 }else
3403 result->kvno = NULL;
3404 return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
3405 }
3406
3407 krb5_error_code KRB5_LIB_FUNCTION
3408 krb5_decrypt_ivec(krb5_context context,
3409 krb5_crypto crypto,
3410 unsigned usage,
3411 void *data,
3412 size_t len,
3413 krb5_data *result,
3414 void *ivec)
3415 {
3416 if(derived_crypto(context, crypto))
3417 return decrypt_internal_derived(context, crypto, usage,
3418 data, len, result, ivec);
3419 else if (special_crypto (context, crypto))
3420 return decrypt_internal_special(context, crypto, usage,
3421 data, len, result, ivec);
3422 else
3423 return decrypt_internal(context, crypto, data, len, result, ivec);
3424 }
3425
3426 krb5_error_code KRB5_LIB_FUNCTION
3427 krb5_decrypt(krb5_context context,
3428 krb5_crypto crypto,
3429 unsigned usage,
3430 void *data,
3431 size_t len,
3432 krb5_data *result)
3433 {
3434 return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
3435 NULL);
3436 }
3437
3438 krb5_error_code KRB5_LIB_FUNCTION
3439 krb5_decrypt_EncryptedData(krb5_context context,
3440 krb5_crypto crypto,
3441 unsigned usage,
3442 const EncryptedData *e,
3443 krb5_data *result)
3444 {
3445 return krb5_decrypt(context, crypto, usage,
3446 e->cipher.data, e->cipher.length, result);
3447 }
3448
3449 /************************************************************
3450 * *
3451 ************************************************************/
3452
3453 #define ENTROPY_NEEDED 128
3454
3455 static int
3456 seed_something(void)
3457 {
3458 char buf[1024], seedfile[256];
3459
3460 /* If there is a seed file, load it. But such a file cannot be trusted,
3461 so use 0 for the entropy estimate */
3462 if (RAND_file_name(seedfile, sizeof(seedfile))) {
3463 int fd;
3464 fd = open(seedfile, O_RDONLY);
3465 if (fd >= 0) {
3466 ssize_t ret;
3467 ret = read(fd, buf, sizeof(buf));
3468 if (ret > 0)
3469 RAND_add(buf, ret, 0.0);
3470 close(fd);
3471 } else
3472 seedfile[0] = '\0';
3473 } else
3474 seedfile[0] = '\0';
3475
3476 /* Calling RAND_status() will try to use /dev/urandom if it exists so
3477 we do not have to deal with it. */
3478 if (RAND_status() != 1) {
3479 krb5_context context;
3480 const char *p;
3481
3482 /* Try using egd */
3483 if (!krb5_init_context(&context)) {
3484 p = krb5_config_get_string(context, NULL, "libdefaults",
3485 "egd_socket", NULL);
3486 if (p != NULL)
3487 RAND_egd_bytes(p, ENTROPY_NEEDED);
3488 krb5_free_context(context);
3489 }
3490 }
3491
3492 if (RAND_status() == 1) {
3493 /* Update the seed file */
3494 if (seedfile[0])
3495 RAND_write_file(seedfile);
3496
3497 return 0;
3498 } else
3499 return -1;
3500 }
3501
3502 void KRB5_LIB_FUNCTION
3503 krb5_generate_random_block(void *buf, size_t len)
3504 {
3505 static int rng_initialized = 0;
3506
3507 HEIMDAL_MUTEX_lock(&crypto_mutex);
3508 if (!rng_initialized) {
3509 if (seed_something())
3510 krb5_abortx(NULL, "Fatal: could not seed the "
3511 "random number generator");
3512
3513 rng_initialized = 1;
3514 }
3515 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3516 if (RAND_bytes(buf, len) != 1)
3517 krb5_abortx(NULL, "Failed to generate random block");
3518 }
3519
3520 static void
3521 DES3_postproc(krb5_context context,
3522 unsigned char *k, size_t len, struct key_data *key)
3523 {
3524 DES3_random_to_key(context, key->key, k, len);
3525
3526 if (key->schedule) {
3527 krb5_free_data(context, key->schedule);
3528 key->schedule = NULL;
3529 }
3530 }
3531
3532 static krb5_error_code
3533 derive_key(krb5_context context,
3534 struct encryption_type *et,
3535 struct key_data *key,
3536 const void *constant,
3537 size_t len)
3538 {
3539 unsigned char *k;
3540 unsigned int nblocks = 0, i;
3541 krb5_error_code ret = 0;
3542 struct key_type *kt = et->keytype;
3543
3544 ret = _key_schedule(context, key);
3545 if(ret)
3546 return ret;
3547 if(et->blocksize * 8 < kt->bits || len != et->blocksize) {
3548 nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
3549 k = malloc(nblocks * et->blocksize);
3550 if(k == NULL) {
3551 krb5_set_error_string(context, "malloc: out of memory");
3552 return ENOMEM;
3553 }
3554 ret = _krb5_n_fold(constant, len, k, et->blocksize);
3555 if (ret) {
3556 free(k);
3557 krb5_set_error_string(context, "out of memory");
3558 return ret;
3559 }
3560 for(i = 0; i < nblocks; i++) {
3561 if(i > 0)
3562 memcpy(k + i * et->blocksize,
3563 k + (i - 1) * et->blocksize,
3564 et->blocksize);
3565 (*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
3566 1, 0, NULL);
3567 }
3568 } else {
3569 /* this case is probably broken, but won't be run anyway */
3570 void *c = malloc(len);
3571 size_t res_len = (kt->bits + 7) / 8;
3572
3573 if(len != 0 && c == NULL) {
3574 krb5_set_error_string(context, "malloc: out of memory");
3575 return ENOMEM;
3576 }
3577 memcpy(c, constant, len);
3578 (*et->encrypt)(context, key, c, len, 1, 0, NULL);
3579 k = malloc(res_len);
3580 if(res_len != 0 && k == NULL) {
3581 free(c);
3582 krb5_set_error_string(context, "malloc: out of memory");
3583 return ENOMEM;
3584 }
3585 ret = _krb5_n_fold(c, len, k, res_len);
3586 if (ret) {
3587 free(k);
3588 krb5_set_error_string(context, "out of memory");
3589 return ret;
3590 }
3591 free(c);
3592 }
3593
3594 /* XXX keytype dependent post-processing */
3595 switch(kt->type) {
3596 case KEYTYPE_DES3:
3597 DES3_postproc(context, k, nblocks * et->blocksize, key);
3598 break;
3599 case KEYTYPE_AES128:
3600 case KEYTYPE_AES256:
3601 memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
3602 break;
3603 default:
3604 krb5_set_error_string(context,
3605 "derive_key() called with unknown keytype (%u)",
3606 kt->type);
3607 ret = KRB5_CRYPTO_INTERNAL;
3608 break;
3609 }
3610 if (key->schedule) {
3611 krb5_free_data(context, key->schedule);
3612 key->schedule = NULL;
3613 }
3614 memset(k, 0, nblocks * et->blocksize);
3615 free(k);
3616 return ret;
3617 }
3618
3619 static struct key_data *
3620 _new_derived_key(krb5_crypto crypto, unsigned usage)
3621 {
3622 struct key_usage *d = crypto->key_usage;
3623 d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
3624 if(d == NULL)
3625 return NULL;
3626 crypto->key_usage = d;
3627 d += crypto->num_key_usage++;
3628 memset(d, 0, sizeof(*d));
3629 d->usage = usage;
3630 return &d->key;
3631 }
3632
3633 krb5_error_code KRB5_LIB_FUNCTION
3634 krb5_derive_key(krb5_context context,
3635 const krb5_keyblock *key,
3636 krb5_enctype etype,
3637 const void *constant,
3638 size_t constant_len,
3639 krb5_keyblock **derived_key)
3640 {
3641 krb5_error_code ret;
3642 struct encryption_type *et;
3643 struct key_data d;
3644
3645 *derived_key = NULL;
3646
3647 et = _find_enctype (etype);
3648 if (et == NULL) {
3649 krb5_set_error_string(context, "encryption type %d not supported",
3650 etype);
3651 return KRB5_PROG_ETYPE_NOSUPP;
3652 }
3653
3654 ret = krb5_copy_keyblock(context, key, &d.key);
3655 if (ret)
3656 return ret;
3657
3658 d.schedule = NULL;
3659 ret = derive_key(context, et, &d, constant, constant_len);
3660 if (ret == 0)
3661 ret = krb5_copy_keyblock(context, d.key, derived_key);
3662 free_key_data(context, &d);
3663 return ret;
3664 }
3665
3666 static krb5_error_code
3667 _get_derived_key(krb5_context context,
3668 krb5_crypto crypto,
3669 unsigned usage,
3670 struct key_data **key)
3671 {
3672 int i;
3673 struct key_data *d;
3674 unsigned char constant[5];
3675
3676 for(i = 0; i < crypto->num_key_usage; i++)
3677 if(crypto->key_usage[i].usage == usage) {
3678 *key = &crypto->key_usage[i].key;
3679 return 0;
3680 }
3681 d = _new_derived_key(crypto, usage);
3682 if(d == NULL) {
3683 krb5_set_error_string(context, "malloc: out of memory");
3684 return ENOMEM;
3685 }
3686 krb5_copy_keyblock(context, crypto->key.key, &d->key);
3687 _krb5_put_int(constant, usage, 5);
3688 derive_key(context, crypto->et, d, constant, sizeof(constant));
3689 *key = d;
3690 return 0;
3691 }
3692
3693
3694 krb5_error_code KRB5_LIB_FUNCTION
3695 krb5_crypto_init(krb5_context context,
3696 const krb5_keyblock *key,
3697 krb5_enctype etype,
3698 krb5_crypto *crypto)
3699 {
3700 krb5_error_code ret;
3701 ALLOC(*crypto, 1);
3702 if(*crypto == NULL) {
3703 krb5_set_error_string(context, "malloc: out of memory");
3704 return ENOMEM;
3705 }
3706 if(etype == ETYPE_NULL)
3707 etype = key->keytype;
3708 (*crypto)->et = _find_enctype(etype);
3709 if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
3710 free(*crypto);
3711 *crypto = NULL;
3712 krb5_set_error_string (context, "encryption type %d not supported",
3713 etype);
3714 return KRB5_PROG_ETYPE_NOSUPP;
3715 }
3716 if((*crypto)->et->keytype->size != key->keyvalue.length) {
3717 free(*crypto);
3718 *crypto = NULL;
3719 krb5_set_error_string (context, "encryption key has bad length");
3720 return KRB5_BAD_KEYSIZE;
3721 }
3722 ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
3723 if(ret) {
3724 free(*crypto);
3725 *crypto = NULL;
3726 return ret;
3727 }
3728 (*crypto)->key.schedule = NULL;
3729 (*crypto)->num_key_usage = 0;
3730 (*crypto)->key_usage = NULL;
3731 return 0;
3732 }
3733
3734 static void
3735 free_key_data(krb5_context context, struct key_data *key)
3736 {
3737 krb5_free_keyblock(context, key->key);
3738 if(key->schedule) {
3739 memset(key->schedule->data, 0, key->schedule->length);
3740 krb5_free_data(context, key->schedule);
3741 }
3742 }
3743
3744 static void
3745 free_key_usage(krb5_context context, struct key_usage *ku)
3746 {
3747 free_key_data(context, &ku->key);
3748 }
3749
3750 krb5_error_code KRB5_LIB_FUNCTION
3751 krb5_crypto_destroy(krb5_context context,
3752 krb5_crypto crypto)
3753 {
3754 int i;
3755
3756 for(i = 0; i < crypto->num_key_usage; i++)
3757 free_key_usage(context, &crypto->key_usage[i]);
3758 free(crypto->key_usage);
3759 free_key_data(context, &crypto->key);
3760 free (crypto);
3761 return 0;
3762 }
3763
3764 krb5_error_code KRB5_LIB_FUNCTION
3765 krb5_crypto_getblocksize(krb5_context context,
3766 krb5_crypto crypto,
3767 size_t *blocksize)
3768 {
3769 *blocksize = crypto->et->blocksize;
3770 return 0;
3771 }
3772
3773 krb5_error_code KRB5_LIB_FUNCTION
3774 krb5_crypto_getenctype(krb5_context context,
3775 krb5_crypto crypto,
3776 krb5_enctype *enctype)
3777 {
3778 *enctype = crypto->et->type;
3779 return 0;
3780 }
3781
3782 krb5_error_code KRB5_LIB_FUNCTION
3783 krb5_crypto_getpadsize(krb5_context context,
3784 krb5_crypto crypto,
3785 size_t *padsize)
3786 {
3787 *padsize = crypto->et->padsize;
3788 return 0;
3789 }
3790
3791 krb5_error_code KRB5_LIB_FUNCTION
3792 krb5_crypto_getconfoundersize(krb5_context context,
3793 krb5_crypto crypto,
3794 size_t *confoundersize)
3795 {
3796 *confoundersize = crypto->et->confoundersize;
3797 return 0;
3798 }
3799
3800 krb5_error_code KRB5_LIB_FUNCTION
3801 krb5_enctype_disable(krb5_context context,
3802 krb5_enctype enctype)
3803 {
3804 struct encryption_type *et = _find_enctype(enctype);
3805 if(et == NULL) {
3806 if (context)
3807 krb5_set_error_string (context, "encryption type %d not supported",
3808 enctype);
3809 return KRB5_PROG_ETYPE_NOSUPP;
3810 }
3811 et->flags |= F_DISABLED;
3812 return 0;
3813 }
3814
3815 krb5_error_code KRB5_LIB_FUNCTION
3816 krb5_string_to_key_derived(krb5_context context,
3817 const void *str,
3818 size_t len,
3819 krb5_enctype etype,
3820 krb5_keyblock *key)
3821 {
3822 struct encryption_type *et = _find_enctype(etype);
3823 krb5_error_code ret;
3824 struct key_data kd;
3825 size_t keylen;
3826 u_char *tmp;
3827
3828 if(et == NULL) {
3829 krb5_set_error_string (context, "encryption type %d not supported",
3830 etype);
3831 return KRB5_PROG_ETYPE_NOSUPP;
3832 }
3833 keylen = et->keytype->bits / 8;
3834
3835 ALLOC(kd.key, 1);
3836 if(kd.key == NULL) {
3837 krb5_set_error_string (context, "malloc: out of memory");
3838 return ENOMEM;
3839 }
3840 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
3841 if(ret) {
3842 free(kd.key);
3843 return ret;
3844 }
3845 kd.key->keytype = etype;
3846 tmp = malloc (keylen);
3847 if(tmp == NULL) {
3848 krb5_free_keyblock(context, kd.key);
3849 krb5_set_error_string (context, "malloc: out of memory");
3850 return ENOMEM;
3851 }
3852 ret = _krb5_n_fold(str, len, tmp, keylen);
3853 if (ret) {
3854 free(tmp);
3855 krb5_set_error_string(context, "out of memory");
3856 return ret;
3857 }
3858 kd.schedule = NULL;
3859 DES3_postproc (context, tmp, keylen, &kd); /* XXX */
3860 memset(tmp, 0, keylen);
3861 free(tmp);
3862 ret = derive_key(context,
3863 et,
3864 &kd,
3865 "kerberos", /* XXX well known constant */
3866 strlen("kerberos"));
3867 ret = krb5_copy_keyblock_contents(context, kd.key, key);
3868 free_key_data(context, &kd);
3869 return ret;
3870 }
3871
3872 static size_t
3873 wrapped_length (krb5_context context,
3874 krb5_crypto crypto,
3875 size_t data_len)
3876 {
3877 struct encryption_type *et = crypto->et;
3878 size_t padsize = et->padsize;
3879 size_t checksumsize = CHECKSUMSIZE(et->checksum);
3880 size_t res;
3881
3882 res = et->confoundersize + checksumsize + data_len;
3883 res = (res + padsize - 1) / padsize * padsize;
3884 return res;
3885 }
3886
3887 static size_t
3888 wrapped_length_dervied (krb5_context context,
3889 krb5_crypto crypto,
3890 size_t data_len)
3891 {
3892 struct encryption_type *et = crypto->et;
3893 size_t padsize = et->padsize;
3894 size_t res;
3895
3896 res = et->confoundersize + data_len;
3897 res = (res + padsize - 1) / padsize * padsize;
3898 if (et->keyed_checksum)
3899 res += et->keyed_checksum->checksumsize;
3900 else
3901 res += et->checksum->checksumsize;
3902 return res;
3903 }
3904
3905 /*
3906 * Return the size of an encrypted packet of length `data_len'
3907 */
3908
3909 size_t
3910 krb5_get_wrapped_length (krb5_context context,
3911 krb5_crypto crypto,
3912 size_t data_len)
3913 {
3914 if (derived_crypto (context, crypto))
3915 return wrapped_length_dervied (context, crypto, data_len);
3916 else
3917 return wrapped_length (context, crypto, data_len);
3918 }
3919
3920 /*
3921 * Return the size of an encrypted packet of length `data_len'
3922 */
3923
3924 static size_t
3925 crypto_overhead (krb5_context context,
3926 krb5_crypto crypto)
3927 {
3928 struct encryption_type *et = crypto->et;
3929 size_t res;
3930
3931 res = CHECKSUMSIZE(et->checksum);
3932 res += et->confoundersize;
3933 if (et->padsize > 1)
3934 res += et->padsize;
3935 return res;
3936 }
3937
3938 static size_t
3939 crypto_overhead_dervied (krb5_context context,
3940 krb5_crypto crypto)
3941 {
3942 struct encryption_type *et = crypto->et;
3943 size_t res;
3944
3945 if (et->keyed_checksum)
3946 res = CHECKSUMSIZE(et->keyed_checksum);
3947 else
3948 res = CHECKSUMSIZE(et->checksum);
3949 res += et->confoundersize;
3950 if (et->padsize > 1)
3951 res += et->padsize;
3952 return res;
3953 }
3954
3955 size_t
3956 krb5_crypto_overhead (krb5_context context, krb5_crypto crypto)
3957 {
3958 if (derived_crypto (context, crypto))
3959 return crypto_overhead_dervied (context, crypto);
3960 else
3961 return crypto_overhead (context, crypto);
3962 }
3963
3964 krb5_error_code KRB5_LIB_FUNCTION
3965 krb5_random_to_key(krb5_context context,
3966 krb5_enctype type,
3967 const void *data,
3968 size_t size,
3969 krb5_keyblock *key)
3970 {
3971 krb5_error_code ret;
3972 struct encryption_type *et = _find_enctype(type);
3973 if(et == NULL) {
3974 krb5_set_error_string(context, "encryption type %d not supported",
3975 type);
3976 return KRB5_PROG_ETYPE_NOSUPP;
3977 }
3978 if ((et->keytype->bits + 7) / 8 > size) {
3979 krb5_set_error_string(context, "encryption key %s needs %d bytes "
3980 "of random to make an encryption key out of it",
3981 et->name, (int)et->keytype->size);
3982 return KRB5_PROG_ETYPE_NOSUPP;
3983 }
3984 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
3985 if(ret)
3986 return ret;
3987 key->keytype = type;
3988 if (et->keytype->random_to_key)
3989 (*et->keytype->random_to_key)(context, key, data, size);
3990 else
3991 memcpy(key->keyvalue.data, data, et->keytype->size);
3992
3993 return 0;
3994 }
3995
3996 krb5_error_code
3997 _krb5_pk_octetstring2key(krb5_context context,
3998 krb5_enctype type,
3999 const void *dhdata,
4000 size_t dhsize,
4001 const heim_octet_string *c_n,
4002 const heim_octet_string *k_n,
4003 krb5_keyblock *key)
4004 {
4005 struct encryption_type *et = _find_enctype(type);
4006 krb5_error_code ret;
4007 size_t keylen, offset;
4008 void *keydata;
4009 unsigned char counter;
4010 unsigned char shaoutput[20];
4011
4012 if(et == NULL) {
4013 krb5_set_error_string(context, "encryption type %d not supported",
4014 type);
4015 return KRB5_PROG_ETYPE_NOSUPP;
4016 }
4017 keylen = (et->keytype->bits + 7) / 8;
4018
4019 keydata = malloc(keylen);
4020 if (keydata == NULL) {
4021 krb5_set_error_string(context, "malloc: out of memory");
4022 return ENOMEM;
4023 }
4024
4025 counter = 0;
4026 offset = 0;
4027 do {
4028 SHA_CTX m;
4029
4030 SHA1_Init(&m);
4031 SHA1_Update(&m, &counter, 1);
4032 SHA1_Update(&m, dhdata, dhsize);
4033 if (c_n)
4034 SHA1_Update(&m, c_n->data, c_n->length);
4035 if (k_n)
4036 SHA1_Update(&m, k_n->data, k_n->length);
4037 SHA1_Final(shaoutput, &m);
4038
4039 memcpy((unsigned char *)keydata + offset,
4040 shaoutput,
4041 min(keylen - offset, sizeof(shaoutput)));
4042
4043 offset += sizeof(shaoutput);
4044 counter++;
4045 } while(offset < keylen);
4046 memset(shaoutput, 0, sizeof(shaoutput));
4047
4048 ret = krb5_random_to_key(context, type, keydata, keylen, key);
4049 memset(keydata, 0, sizeof(keylen));
4050 free(keydata);
4051 return ret;
4052 }
4053
4054 static krb5_error_code
4055 encode_uvinfo(krb5_context context, krb5_const_principal p, krb5_data *data)
4056 {
4057 KRB5PrincipalName pn;
4058 krb5_error_code ret;
4059 size_t size;
4060
4061 pn.principalName = p->name;
4062 pn.realm = p->realm;
4063
4064 ASN1_MALLOC_ENCODE(KRB5PrincipalName, data->data, data->length,
4065 &pn, &size, ret);
4066 if (ret) {
4067 krb5_data_zero(data);
4068 krb5_set_error_string(context, "Failed to encode KRB5PrincipalName");
4069 return ret;
4070 }
4071 if (data->length != size)
4072 krb5_abortx(context, "asn1 compiler internal error");
4073 return 0;
4074 }
4075
4076 static krb5_error_code
4077 encode_otherinfo(krb5_context context,
4078 const AlgorithmIdentifier *ai,
4079 krb5_const_principal client,
4080 krb5_const_principal server,
4081 krb5_enctype enctype,
4082 const krb5_data *as_req,
4083 const krb5_data *pk_as_rep,
4084 const Ticket *ticket,
4085 krb5_data *other)
4086 {
4087 PkinitSP80056AOtherInfo otherinfo;
4088 PkinitSuppPubInfo pubinfo;
4089 krb5_error_code ret;
4090 krb5_data pub;
4091 size_t size;
4092
4093 krb5_data_zero(other);
4094 memset(&otherinfo, 0, sizeof(otherinfo));
4095 memset(&pubinfo, 0, sizeof(pubinfo));
4096
4097 pubinfo.enctype = enctype;
4098 pubinfo.as_REQ = *as_req;
4099 pubinfo.pk_as_rep = *pk_as_rep;
4100 pubinfo.ticket = *ticket;
4101 ASN1_MALLOC_ENCODE(PkinitSuppPubInfo, pub.data, pub.length,
4102 &pubinfo, &size, ret);
4103 if (ret) {
4104 krb5_set_error_string(context, "out of memory");
4105 return ret;
4106 }
4107 if (pub.length != size)
4108 krb5_abortx(context, "asn1 compiler internal error");
4109
4110 ret = encode_uvinfo(context, client, &otherinfo.partyUInfo);
4111 if (ret) {
4112 free(pub.data);
4113 return ret;
4114 }
4115 ret = encode_uvinfo(context, server, &otherinfo.partyVInfo);
4116 if (ret) {
4117 free(otherinfo.partyUInfo.data);
4118 free(pub.data);
4119 return ret;
4120 }
4121
4122 otherinfo.algorithmID = *ai;
4123 otherinfo.suppPubInfo = &pub;
4124
4125 ASN1_MALLOC_ENCODE(PkinitSP80056AOtherInfo, other->data, other->length,
4126 &otherinfo, &size, ret);
4127 free(otherinfo.partyUInfo.data);
4128 free(otherinfo.partyVInfo.data);
4129 free(pub.data);
4130 if (ret) {
4131 krb5_set_error_string(context, "out of memory");
4132 return ret;
4133 }
4134 if (other->length != size)
4135 krb5_abortx(context, "asn1 compiler internal error");
4136
4137 return 0;
4138 }
4139
4140 krb5_error_code
4141 _krb5_pk_kdf(krb5_context context,
4142 const struct AlgorithmIdentifier *ai,
4143 const void *dhdata,
4144 size_t dhsize,
4145 krb5_const_principal client,
4146 krb5_const_principal server,
4147 krb5_enctype enctype,
4148 const krb5_data *as_req,
4149 const krb5_data *pk_as_rep,
4150 const Ticket *ticket,
4151 krb5_keyblock *key)
4152 {
4153 struct encryption_type *et;
4154 krb5_error_code ret;
4155 krb5_data other;
4156 size_t keylen, offset;
4157 uint32_t counter;
4158 unsigned char *keydata;
4159 unsigned char shaoutput[20];
4160
4161 if (der_heim_oid_cmp(oid_id_pkinit_kdf_ah_sha1(), &ai->algorithm) != 0) {
4162 krb5_set_error_string(context, "kdf not supported");
4163 return KRB5_PROG_ETYPE_NOSUPP;
4164 }
4165 if (ai->parameters != NULL &&
4166 (ai->parameters->length != 2 ||
4167 memcmp(ai->parameters->data, "\x05\x00", 2) != 0))
4168 {
4169 krb5_set_error_string(context, "kdf params not NULL or the NULL-type");
4170 return KRB5_PROG_ETYPE_NOSUPP;
4171 }
4172
4173 et = _find_enctype(enctype);
4174 if(et == NULL) {
4175 krb5_set_error_string(context, "encryption type %d not supported",
4176 enctype);
4177 return KRB5_PROG_ETYPE_NOSUPP;
4178 }
4179 keylen = (et->keytype->bits + 7) / 8;
4180
4181 keydata = malloc(keylen);
4182 if (keydata == NULL) {
4183 krb5_set_error_string(context, "malloc: out of memory");
4184 return ENOMEM;
4185 }
4186
4187 ret = encode_otherinfo(context, ai, client, server,
4188 enctype, as_req, pk_as_rep, ticket, &other);
4189 if (ret) {
4190 free(keydata);
4191 return ret;
4192 }
4193
4194 offset = 0;
4195 counter = 1;
4196 do {
4197 unsigned char cdata[4];
4198 SHA_CTX m;
4199
4200 SHA1_Init(&m);
4201 _krb5_put_int(cdata, counter, 4);
4202 SHA1_Update(&m, cdata, 4);
4203 SHA1_Update(&m, dhdata, dhsize);
4204 SHA1_Update(&m, other.data, other.length);
4205 SHA1_Final(shaoutput, &m);
4206
4207 memcpy((unsigned char *)keydata + offset,
4208 shaoutput,
4209 min(keylen - offset, sizeof(shaoutput)));
4210
4211 offset += sizeof(shaoutput);
4212 counter++;
4213 } while(offset < keylen);
4214 memset(shaoutput, 0, sizeof(shaoutput));
4215
4216 free(other.data);
4217
4218 ret = krb5_random_to_key(context, enctype, keydata, keylen, key);
4219 memset(keydata, 0, sizeof(keylen));
4220 free(keydata);
4221
4222 return ret;
4223 }
4224
4225
4226 krb5_error_code KRB5_LIB_FUNCTION
4227 krb5_crypto_prf_length(krb5_context context,
4228 krb5_enctype type,
4229 size_t *length)
4230 {
4231 struct encryption_type *et = _find_enctype(type);
4232
4233 if(et == NULL || et->prf_length == 0) {
4234 krb5_set_error_string(context, "encryption type %d not supported",
4235 type);
4236 return KRB5_PROG_ETYPE_NOSUPP;
4237 }
4238
4239 *length = et->prf_length;
4240 return 0;
4241 }
4242
4243 krb5_error_code KRB5_LIB_FUNCTION
4244 krb5_crypto_prf(krb5_context context,
4245 const krb5_crypto crypto,
4246 const krb5_data *input,
4247 krb5_data *output)
4248 {
4249 struct encryption_type *et = crypto->et;
4250
4251 krb5_data_zero(output);
4252
4253 if(et->prf == NULL) {
4254 krb5_set_error_string(context, "kerberos prf for %s not supported",
4255 et->name);
4256 return KRB5_PROG_ETYPE_NOSUPP;
4257 }
4258
4259 return (*et->prf)(context, crypto, input, output);
4260 }
4261
4262
4263
4264
4265 #ifdef CRYPTO_DEBUG
4266
4267 static krb5_error_code
4268 krb5_get_keyid(krb5_context context,
4269 krb5_keyblock *key,
4270 uint32_t *keyid)
4271 {
4272 MD5_CTX md5;
4273 unsigned char tmp[16];
4274
4275 MD5_Init (&md5);
4276 MD5_Update (&md5, key->keyvalue.data, key->keyvalue.length);
4277 MD5_Final (tmp, &md5);
4278 *keyid = (tmp[12] << 24) | (tmp[13] << 16) | (tmp[14] << 8) | tmp[15];
4279 return 0;
4280 }
4281
4282 static void
4283 krb5_crypto_debug(krb5_context context,
4284 int encryptp,
4285 size_t len,
4286 krb5_keyblock *key)
4287 {
4288 uint32_t keyid;
4289 char *kt;
4290 krb5_get_keyid(context, key, &keyid);
4291 krb5_enctype_to_string(context, key->keytype, &kt);
4292 krb5_warnx(context, "%s %lu bytes with key-id %#x (%s)",
4293 encryptp ? "encrypting" : "decrypting",
4294 (unsigned long)len,
4295 keyid,
4296 kt);
4297 free(kt);
4298 }
4299
4300 #endif /* CRYPTO_DEBUG */
4301
4302 #if 0
4303 int
4304 main()
4305 {
4306 #if 0
4307 int i;
4308 krb5_context context;
4309 krb5_crypto crypto;
4310 struct key_data *d;
4311 krb5_keyblock key;
4312 char constant[4];
4313 unsigned usage = ENCRYPTION_USAGE(3);
4314 krb5_error_code ret;
4315
4316 ret = krb5_init_context(&context);
4317 if (ret)
4318 errx (1, "krb5_init_context failed: %d", ret);
4319
4320 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4321 key.keyvalue.data = "\xb3\x85\x58\x94\xd9\xdc\x7c\xc8"
4322 "\x25\xe9\x85\xab\x3e\xb5\xfb\x0e"
4323 "\xc8\xdf\xab\x26\x86\x64\x15\x25";
4324 key.keyvalue.length = 24;
4325
4326 krb5_crypto_init(context, &key, 0, &crypto);
4327
4328 d = _new_derived_key(crypto, usage);
4329 if(d == NULL)
4330 krb5_errx(context, 1, "_new_derived_key failed");
4331 krb5_copy_keyblock(context, crypto->key.key, &d->key);
4332 _krb5_put_int(constant, usage, 4);
4333 derive_key(context, crypto->et, d, constant, sizeof(constant));
4334 return 0;
4335 #else
4336 int i;
4337 krb5_context context;
4338 krb5_crypto crypto;
4339 struct key_data *d;
4340 krb5_keyblock key;
4341 krb5_error_code ret;
4342 Checksum res;
4343
4344 char *data = "what do ya want for nothing?";
4345
4346 ret = krb5_init_context(&context);
4347 if (ret)
4348 errx (1, "krb5_init_context failed: %d", ret);
4349
4350 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4351 key.keyvalue.data = "Jefe";
4352 /* "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"
4353 "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"; */
4354 key.keyvalue.length = 4;
4355
4356 d = ecalloc(1, sizeof(*d));
4357 d->key = &key;
4358 res.checksum.length = 20;
4359 res.checksum.data = emalloc(res.checksum.length);
4360 SP_HMAC_SHA1_checksum(context, d, data, 28, &res);
4361
4362 return 0;
4363 #endif
4364 }
4365 #endif
Heimdal