2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
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
34 #include "krb5_locl.h"
35 RCSID("$Id: crypto.c,v 1.130 2005/12/02 14:47:44 lha Exp $");
39 static void krb5_crypto_debug(krb5_context, int, size_t, krb5_keyblock*);
53 struct krb5_crypto_data {
54 struct encryption_type *et;
57 struct key_usage *key_usage;
61 #define kcrypto_oid_enc(n) { sizeof(n)/sizeof(n[0]), n }
63 #define CRYPTO_ETYPE(C) ((C)->et->type)
65 /* bits for `flags' below */
66 #define F_KEYED 1 /* checksum is keyed */
67 #define F_CPROOF 2 /* checksum is collision proof */
68 #define F_DERIVED 4 /* uses derived keys */
69 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */
70 #define F_PSEUDO 16 /* not a real protocol type */
71 #define F_SPECIAL 32 /* backwards */
72 #define F_DISABLED 64 /* enctype/checksum disabled */
73 #define F_PADCMS 128 /* padding done like in CMS */
78 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
79 krb5_salt, krb5_data, krb5_keyblock*);
83 krb5_keytype type; /* XXX */
90 krb5_enctype best_etype;
92 void (*random_key)(krb5_context, krb5_keyblock*);
93 void (*schedule)(krb5_context, struct key_data *, const void *);
94 struct salt_type *string_to_key;
95 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
96 krb5_error_code (*get_params)(krb5_context, const krb5_data *,
97 void **, krb5_data *);
98 krb5_error_code (*set_params)(krb5_context, const void *,
99 const krb5_data *, krb5_data *);
102 struct checksum_type {
108 void (*checksum)(krb5_context context,
109 struct key_data *key,
110 const void *buf, size_t len,
113 krb5_error_code (*verify)(krb5_context context,
114 struct key_data *key,
115 const void *buf, size_t len,
120 struct encryption_type {
126 size_t confoundersize;
127 struct key_type *keytype;
128 struct checksum_type *checksum;
129 struct checksum_type *keyed_checksum;
131 krb5_error_code (*encrypt)(krb5_context context,
132 struct key_data *key,
133 void *data, size_t len,
134 krb5_boolean encryptp,
139 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
140 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55)
141 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99)
143 static struct checksum_type *_find_checksum(krb5_cksumtype type);
144 static struct encryption_type *_find_enctype(krb5_enctype type);
145 static struct key_type *_find_keytype(krb5_keytype type);
146 static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
147 unsigned, struct key_data**);
148 static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
149 static krb5_error_code derive_key(krb5_context context,
150 struct encryption_type *et,
151 struct key_data *key,
152 const void *constant,
154 static krb5_error_code hmac(krb5_context context,
155 struct checksum_type *cm,
159 struct key_data *keyblock,
161 static void free_key_data(krb5_context context, struct key_data *key);
162 static krb5_error_code usage2arcfour (krb5_context, unsigned *);
163 static void xor (DES_cblock *, const unsigned char *);
165 /************************************************************
167 ************************************************************/
169 static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
173 krb5_DES_random_key(krb5_context context,
176 DES_cblock *k = key->keyvalue.data;
178 krb5_generate_random_block(k, sizeof(DES_cblock));
179 DES_set_odd_parity(k);
180 } while(DES_is_weak_key(k));
184 krb5_DES_schedule(krb5_context context,
185 struct key_data *key,
188 DES_set_key(key->key->keyvalue.data, key->schedule->data);
191 #ifdef ENABLE_AFS_STRING_TO_KEY
193 /* This defines the Andrew string_to_key function. It accepts a password
194 * string as input and converts its via a one-way encryption algorithm to a DES
195 * encryption key. It is compatible with the original Andrew authentication
196 * service password database.
200 * Short passwords, i.e 8 characters or less.
203 krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
207 char password[8+1]; /* crypt is limited to 8 chars anyway */
210 for(i = 0; i < 8; i++) {
211 char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
213 tolower(((unsigned char*)cell.data)[i]) : 0);
214 password[i] = c ? c : 'X';
218 memcpy(key, crypt(password, "p1") + 2, sizeof(DES_cblock));
220 /* parity is inserted into the LSB so left shift each byte up one
221 bit. This allows ascii characters with a zero MSB to retain as
222 much significance as possible. */
223 for (i = 0; i < sizeof(DES_cblock); i++)
224 ((unsigned char*)key)[i] <<= 1;
225 DES_set_odd_parity (key);
229 * Long passwords, i.e 9 characters or more.
232 krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
236 DES_key_schedule schedule;
242 memcpy(password, pw.data, min(pw.length, sizeof(password)));
243 if(pw.length < sizeof(password)) {
244 int len = min(cell.length, sizeof(password) - pw.length);
247 memcpy(password + pw.length, cell.data, len);
248 for (i = pw.length; i < pw.length + len; ++i)
249 password[i] = tolower((unsigned char)password[i]);
251 passlen = min(sizeof(password), pw.length + cell.length);
252 memcpy(&ivec, "kerberos", 8);
253 memcpy(&temp_key, "kerberos", 8);
254 DES_set_odd_parity (&temp_key);
255 DES_set_key (&temp_key, &schedule);
256 DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
258 memcpy(&temp_key, &ivec, 8);
259 DES_set_odd_parity (&temp_key);
260 DES_set_key (&temp_key, &schedule);
261 DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
262 memset(&schedule, 0, sizeof(schedule));
263 memset(&temp_key, 0, sizeof(temp_key));
264 memset(&ivec, 0, sizeof(ivec));
265 memset(password, 0, sizeof(password));
267 DES_set_odd_parity (key);
270 static krb5_error_code
271 DES_AFS3_string_to_key(krb5_context context,
272 krb5_enctype enctype,
279 if(password.length > 8)
280 krb5_DES_AFS3_Transarc_string_to_key(password, salt.saltvalue, &tmp);
282 krb5_DES_AFS3_CMU_string_to_key(password, salt.saltvalue, &tmp);
283 key->keytype = enctype;
284 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
285 memset(&key, 0, sizeof(key));
288 #endif /* ENABLE_AFS_STRING_TO_KEY */
291 DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
293 DES_key_schedule schedule;
298 unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
299 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
302 p = (unsigned char*)key;
303 for (i = 0; i < length; i++) {
304 unsigned char tmp = data[i];
308 *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
312 DES_set_odd_parity(key);
313 if(DES_is_weak_key(key))
315 DES_set_key(key, &schedule);
316 DES_cbc_cksum((void*)data, key, length, &schedule, key);
317 memset(&schedule, 0, sizeof(schedule));
318 DES_set_odd_parity(key);
319 if(DES_is_weak_key(key))
323 static krb5_error_code
324 krb5_DES_string_to_key(krb5_context context,
325 krb5_enctype enctype,
335 #ifdef ENABLE_AFS_STRING_TO_KEY
336 if (opaque.length == 1) {
338 _krb5_get_int(opaque.data, &v, 1);
340 return DES_AFS3_string_to_key(context, enctype, password,
345 len = password.length + salt.saltvalue.length;
347 if(len > 0 && s == NULL) {
348 krb5_set_error_string(context, "malloc: out of memory");
351 memcpy(s, password.data, password.length);
352 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
353 DES_string_to_key_int(s, len, &tmp);
354 key->keytype = enctype;
355 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
356 memset(&tmp, 0, sizeof(tmp));
363 krb5_DES_random_to_key(krb5_context context,
368 DES_cblock *k = key->keyvalue.data;
369 memcpy(k, data, key->keyvalue.length);
370 DES_set_odd_parity(k);
371 if(DES_is_weak_key(k))
372 xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
380 DES3_random_key(krb5_context context,
383 DES_cblock *k = key->keyvalue.data;
385 krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
386 DES_set_odd_parity(&k[0]);
387 DES_set_odd_parity(&k[1]);
388 DES_set_odd_parity(&k[2]);
389 } while(DES_is_weak_key(&k[0]) ||
390 DES_is_weak_key(&k[1]) ||
391 DES_is_weak_key(&k[2]));
395 DES3_schedule(krb5_context context,
396 struct key_data *key,
399 DES_cblock *k = key->key->keyvalue.data;
400 DES_key_schedule *s = key->schedule->data;
401 DES_set_key(&k[0], &s[0]);
402 DES_set_key(&k[1], &s[1]);
403 DES_set_key(&k[2], &s[2]);
407 * A = A xor B. A & B are 8 bytes.
411 xor (DES_cblock *key, const unsigned char *b)
413 unsigned char *a = (unsigned char*)key;
424 static krb5_error_code
425 DES3_string_to_key(krb5_context context,
426 krb5_enctype enctype,
434 unsigned char tmp[24];
437 len = password.length + salt.saltvalue.length;
439 if(len != 0 && str == NULL) {
440 krb5_set_error_string(context, "malloc: out of memory");
443 memcpy(str, password.data, password.length);
444 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
447 DES_key_schedule s[3];
450 _krb5_n_fold(str, len, tmp, 24);
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(keys + i, &s[i]);
459 memset(&ivec, 0, sizeof(ivec));
460 DES_ede3_cbc_encrypt(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");
471 memset(tmp, 0, sizeof(tmp));
473 key->keytype = enctype;
474 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
475 memset(keys, 0, sizeof(keys));
481 static krb5_error_code
482 DES3_string_to_key_derived(krb5_context context,
483 krb5_enctype enctype,
490 size_t len = password.length + salt.saltvalue.length;
494 if(len != 0 && s == NULL) {
495 krb5_set_error_string(context, "malloc: out of memory");
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,
511 DES3_random_to_key(krb5_context context,
516 unsigned char *x = key->keyvalue.data;
517 const u_char *q = data;
521 memset(x, 0, sizeof(x));
522 for (i = 0; i < 3; ++i) {
524 for (j = 0; j < 7; ++j) {
525 unsigned char b = q[7 * i + j];
530 for (j = 6; j >= 0; --j) {
531 foo |= q[7 * i + j] & 1;
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");
549 ARCFOUR_schedule(krb5_context context,
553 RC4_set_key (kd->schedule->data,
554 kd->key->keyvalue.length, kd->key->keyvalue.data);
557 static krb5_error_code
558 ARCFOUR_string_to_key(krb5_context context,
559 krb5_enctype enctype,
570 len = 2 * password.length;
572 if (len != 0 && s == NULL) {
573 krb5_set_error_string(context, "malloc: out of memory");
576 for (p = s, i = 0; i < password.length; ++i) {
577 *p++ = ((char *)password.data)[i];
581 MD4_Update (&m, s, len);
582 key->keytype = enctype;
583 krb5_data_alloc (&key->keyvalue, 16);
584 MD4_Final (key->keyvalue.data, &m);
594 /* iter is really 1 based, so iter == 0 will be 1 iteration */
596 krb5_error_code KRB5_LIB_FUNCTION
597 _krb5_PKCS5_PBKDF2(krb5_context context, krb5_cksumtype cktype,
598 krb5_data password, krb5_salt salt, u_int32_t iter,
599 krb5_keytype type, krb5_keyblock *key)
601 struct checksum_type *c = _find_checksum(cktype);
603 size_t datalen, leftofkey;
606 struct key_data ksign;
609 char *data, *tmpcksum;
614 krb5_set_error_string(context, "checksum %d not supported", cktype);
615 return KRB5_PROG_KEYTYPE_NOSUPP;
618 kt = _find_keytype(type);
620 krb5_set_error_string(context, "key type %d not supported", type);
621 return KRB5_PROG_KEYTYPE_NOSUPP;
625 ret = krb5_data_alloc (&key->keyvalue, kt->bits / 8);
627 krb5_set_error_string(context, "malloc: out of memory");
631 ret = krb5_data_alloc (&result.checksum, c->checksumsize);
633 krb5_set_error_string(context, "malloc: out of memory");
634 krb5_data_free (&key->keyvalue);
638 tmpcksum = malloc(c->checksumsize);
639 if (tmpcksum == NULL) {
640 krb5_set_error_string(context, "malloc: out of memory");
641 krb5_data_free (&key->keyvalue);
642 krb5_data_free (&result.checksum);
646 datalen = salt.saltvalue.length + 4;
647 data = malloc(datalen);
649 krb5_set_error_string(context, "malloc: out of memory");
651 krb5_data_free (&key->keyvalue);
652 krb5_data_free (&result.checksum);
656 kb.keyvalue = password;
659 memcpy(data, salt.saltvalue.data, salt.saltvalue.length);
662 leftofkey = key->keyvalue.length;
663 p = key->keyvalue.data;
668 if (leftofkey > c->checksumsize)
669 len = c->checksumsize;
673 _krb5_put_int(data + datalen - 4, keypart, 4);
675 ret = hmac(context, c, data, datalen, 0, &ksign, &result);
677 krb5_abortx(context, "hmac failed");
678 memcpy(p, result.checksum.data, len);
679 memcpy(tmpcksum, result.checksum.data, result.checksum.length);
680 for (i = 0; i < iter; i++) {
681 ret = hmac(context, c, tmpcksum, result.checksum.length,
684 krb5_abortx(context, "hmac failed");
685 memcpy(tmpcksum, result.checksum.data, result.checksum.length);
686 for (j = 0; j < len; j++)
697 krb5_data_free (&result.checksum);
702 int _krb5_AES_string_to_default_iterator = 4096;
704 static krb5_error_code
705 AES_string_to_key(krb5_context context,
706 krb5_enctype enctype,
714 struct encryption_type *et;
717 if (opaque.length == 0)
718 iter = _krb5_AES_string_to_default_iterator - 1;
719 else if (opaque.length == 4) {
721 _krb5_get_int(opaque.data, &v, 4);
722 iter = ((u_int32_t)v) - 1;
724 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
727 et = _find_enctype(enctype);
729 return KRB5_PROG_KEYTYPE_NOSUPP;
731 ret = _krb5_PKCS5_PBKDF2(context, CKSUMTYPE_SHA1, password, salt,
736 ret = krb5_copy_keyblock(context, key, &kd.key);
739 ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
740 krb5_free_keyblock_contents(context, key);
742 ret = krb5_copy_keyblock_contents(context, kd.key, key);
743 free_key_data(context, &kd);
749 struct krb5_aes_schedule {
755 AES_schedule(krb5_context context,
759 struct krb5_aes_schedule *key = kd->schedule->data;
760 int bits = kd->key->keyvalue.length * 8;
762 memset(key, 0, sizeof(*key));
763 AES_set_encrypt_key(kd->key->keyvalue.data, bits, &key->ekey);
764 AES_set_decrypt_key(kd->key->keyvalue.data, bits, &key->dkey);
772 int maximum_effective_key;
775 static krb5_error_code
776 rc2_get_params(krb5_context context,
777 const krb5_data *data,
781 RC2CBCParameter rc2params;
782 struct _RC2_params *p;
786 ret = decode_RC2CBCParameter(data->data, data->length, &rc2params, &size);
788 krb5_set_error_string(context, "Can't decode RC2 parameters");
791 p = malloc(sizeof(*p));
793 free_RC2CBCParameter(&rc2params);
794 krb5_set_error_string(context, "malloc - out of memory");
798 switch(rc2params.rc2ParameterVersion) {
800 p->maximum_effective_key = 40;
803 p->maximum_effective_key = 64;
806 p->maximum_effective_key = 128;
811 ret = copy_octet_string(&rc2params.iv, ivec);
812 free_RC2CBCParameter(&rc2params);
818 static krb5_error_code
819 rc2_set_params(krb5_context context,
821 const krb5_data *ivec,
824 RC2CBCParameter rc2params;
825 const struct _RC2_params *p = params;
826 int maximum_effective_key = 128;
830 memset(&rc2params, 0, sizeof(rc2params));
833 maximum_effective_key = p->maximum_effective_key;
836 switch(maximum_effective_key) {
838 rc2params.rc2ParameterVersion = 160;
841 rc2params.rc2ParameterVersion = 120;
844 rc2params.rc2ParameterVersion = 58;
847 ret = copy_octet_string(ivec, &rc2params.iv);
851 ASN1_MALLOC_ENCODE(RC2CBCParameter, data->data, data->length,
852 &rc2params, &size, ret);
853 if (ret == 0 && size != data->length)
854 krb5_abortx(context, "Internal asn1 encoder failure");
855 free_RC2CBCParameter(&rc2params);
861 rc2_schedule(krb5_context context,
865 const struct _RC2_params *p = params;
866 int maximum_effective_key = 128;
868 maximum_effective_key = p->maximum_effective_key;
869 RC2_set_key (kd->schedule->data,
870 kd->key->keyvalue.length,
871 kd->key->keyvalue.data,
872 maximum_effective_key);
880 static struct salt_type des_salt[] = {
884 krb5_DES_string_to_key
886 #ifdef ENABLE_AFS_STRING_TO_KEY
890 DES_AFS3_string_to_key
896 static struct salt_type des3_salt[] = {
905 static struct salt_type des3_salt_derived[] = {
909 DES3_string_to_key_derived
914 static struct salt_type AES_salt[] = {
923 static struct salt_type arcfour_salt[] = {
927 ARCFOUR_string_to_key
936 static struct key_type keytype_null = {
948 static struct key_type keytype_des = {
954 sizeof(DES_key_schedule),
958 krb5_DES_random_to_key
961 static struct key_type keytype_des3 = {
965 3 * sizeof(DES_cblock),
966 3 * sizeof(DES_cblock),
967 3 * sizeof(DES_key_schedule),
974 static struct key_type keytype_des3_derived = {
978 3 * sizeof(DES_cblock),
979 3 * sizeof(DES_cblock),
980 3 * sizeof(DES_key_schedule),
987 static struct key_type keytype_aes128 = {
993 sizeof(struct krb5_aes_schedule),
999 static struct key_type keytype_aes192 = {
1005 sizeof(struct krb5_aes_schedule),
1011 static struct key_type keytype_aes256 = {
1017 sizeof(struct krb5_aes_schedule),
1023 static struct key_type keytype_arcfour = {
1035 static struct key_type keytype_rc2 = {
1044 NULL, /* XXX salt */
1050 static struct key_type *keytypes[] = {
1053 &keytype_des3_derived,
1062 static int num_keytypes = sizeof(keytypes) / sizeof(keytypes[0]);
1064 static struct key_type *
1065 _find_keytype(krb5_keytype type)
1068 for(i = 0; i < num_keytypes; i++)
1069 if(keytypes[i]->type == type)
1075 krb5_error_code KRB5_LIB_FUNCTION
1076 krb5_salttype_to_string (krb5_context context,
1078 krb5_salttype stype,
1081 struct encryption_type *e;
1082 struct salt_type *st;
1084 e = _find_enctype (etype);
1086 krb5_set_error_string(context, "encryption type %d not supported",
1088 return KRB5_PROG_ETYPE_NOSUPP;
1090 for (st = e->keytype->string_to_key; st && st->type; st++) {
1091 if (st->type == stype) {
1092 *string = strdup (st->name);
1093 if (*string == NULL) {
1094 krb5_set_error_string(context, "malloc: out of memory");
1100 krb5_set_error_string(context, "salttype %d not supported", stype);
1101 return HEIM_ERR_SALTTYPE_NOSUPP;
1104 krb5_error_code KRB5_LIB_FUNCTION
1105 krb5_string_to_salttype (krb5_context context,
1108 krb5_salttype *salttype)
1110 struct encryption_type *e;
1111 struct salt_type *st;
1113 e = _find_enctype (etype);
1115 krb5_set_error_string(context, "encryption type %d not supported",
1117 return KRB5_PROG_ETYPE_NOSUPP;
1119 for (st = e->keytype->string_to_key; st && st->type; st++) {
1120 if (strcasecmp (st->name, string) == 0) {
1121 *salttype = st->type;
1125 krb5_set_error_string(context, "salttype %s not supported", string);
1126 return HEIM_ERR_SALTTYPE_NOSUPP;
1129 krb5_error_code KRB5_LIB_FUNCTION
1130 krb5_get_pw_salt(krb5_context context,
1131 krb5_const_principal principal,
1136 krb5_error_code ret;
1139 salt->salttype = KRB5_PW_SALT;
1140 len = strlen(principal->realm);
1141 for (i = 0; i < principal->name.name_string.len; ++i)
1142 len += strlen(principal->name.name_string.val[i]);
1143 ret = krb5_data_alloc (&salt->saltvalue, len);
1146 p = salt->saltvalue.data;
1147 memcpy (p, principal->realm, strlen(principal->realm));
1148 p += strlen(principal->realm);
1149 for (i = 0; i < principal->name.name_string.len; ++i) {
1151 principal->name.name_string.val[i],
1152 strlen(principal->name.name_string.val[i]));
1153 p += strlen(principal->name.name_string.val[i]);
1158 krb5_error_code KRB5_LIB_FUNCTION
1159 krb5_free_salt(krb5_context context,
1162 krb5_data_free(&salt.saltvalue);
1166 krb5_error_code KRB5_LIB_FUNCTION
1167 krb5_string_to_key_data (krb5_context context,
1168 krb5_enctype enctype,
1170 krb5_principal principal,
1173 krb5_error_code ret;
1176 ret = krb5_get_pw_salt(context, principal, &salt);
1179 ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
1180 krb5_free_salt(context, salt);
1184 krb5_error_code KRB5_LIB_FUNCTION
1185 krb5_string_to_key (krb5_context context,
1186 krb5_enctype enctype,
1187 const char *password,
1188 krb5_principal principal,
1192 pw.data = rk_UNCONST(password);
1193 pw.length = strlen(password);
1194 return krb5_string_to_key_data(context, enctype, pw, principal, key);
1197 krb5_error_code KRB5_LIB_FUNCTION
1198 krb5_string_to_key_data_salt (krb5_context context,
1199 krb5_enctype enctype,
1205 krb5_data_zero(&opaque);
1206 return krb5_string_to_key_data_salt_opaque(context, enctype, password,
1211 * Do a string -> key for encryption type `enctype' operation on
1212 * `password' (with salt `salt' and the enctype specific data string
1213 * `opaque'), returning the resulting key in `key'
1216 krb5_error_code KRB5_LIB_FUNCTION
1217 krb5_string_to_key_data_salt_opaque (krb5_context context,
1218 krb5_enctype enctype,
1224 struct encryption_type *et =_find_enctype(enctype);
1225 struct salt_type *st;
1227 krb5_set_error_string(context, "encryption type %d not supported",
1229 return KRB5_PROG_ETYPE_NOSUPP;
1231 for(st = et->keytype->string_to_key; st && st->type; st++)
1232 if(st->type == salt.salttype)
1233 return (*st->string_to_key)(context, enctype, password,
1235 krb5_set_error_string(context, "salt type %d not supported",
1237 return HEIM_ERR_SALTTYPE_NOSUPP;
1241 * Do a string -> key for encryption type `enctype' operation on the
1242 * string `password' (with salt `salt'), returning the resulting key
1246 krb5_error_code KRB5_LIB_FUNCTION
1247 krb5_string_to_key_salt (krb5_context context,
1248 krb5_enctype enctype,
1249 const char *password,
1254 pw.data = rk_UNCONST(password);
1255 pw.length = strlen(password);
1256 return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
1259 krb5_error_code KRB5_LIB_FUNCTION
1260 krb5_string_to_key_salt_opaque (krb5_context context,
1261 krb5_enctype enctype,
1262 const char *password,
1268 pw.data = rk_UNCONST(password);
1269 pw.length = strlen(password);
1270 return krb5_string_to_key_data_salt_opaque(context, enctype,
1271 pw, salt, opaque, key);
1274 krb5_error_code KRB5_LIB_FUNCTION
1275 krb5_keytype_to_string(krb5_context context,
1276 krb5_keytype keytype,
1279 struct key_type *kt = _find_keytype(keytype);
1281 krb5_set_error_string(context, "key type %d not supported", keytype);
1282 return KRB5_PROG_KEYTYPE_NOSUPP;
1284 *string = strdup(kt->name);
1285 if(*string == NULL) {
1286 krb5_set_error_string(context, "malloc: out of memory");
1292 krb5_error_code KRB5_LIB_FUNCTION
1293 krb5_string_to_keytype(krb5_context context,
1295 krb5_keytype *keytype)
1298 for(i = 0; i < num_keytypes; i++)
1299 if(strcasecmp(keytypes[i]->name, string) == 0){
1300 *keytype = keytypes[i]->type;
1303 krb5_set_error_string(context, "key type %s not supported", string);
1304 return KRB5_PROG_KEYTYPE_NOSUPP;
1307 krb5_error_code KRB5_LIB_FUNCTION
1308 krb5_enctype_keysize(krb5_context context,
1312 struct encryption_type *et = _find_enctype(type);
1314 krb5_set_error_string(context, "encryption type %d not supported",
1316 return KRB5_PROG_ETYPE_NOSUPP;
1318 *keysize = et->keytype->size;
1322 krb5_error_code KRB5_LIB_FUNCTION
1323 krb5_generate_random_keyblock(krb5_context context,
1327 krb5_error_code ret;
1328 struct encryption_type *et = _find_enctype(type);
1330 krb5_set_error_string(context, "encryption type %d not supported",
1332 return KRB5_PROG_ETYPE_NOSUPP;
1334 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
1337 key->keytype = type;
1338 if(et->keytype->random_key)
1339 (*et->keytype->random_key)(context, key);
1341 krb5_generate_random_block(key->keyvalue.data,
1342 key->keyvalue.length);
1346 static krb5_error_code
1347 _key_schedule(krb5_context context,
1348 struct key_data *key,
1351 krb5_error_code ret;
1352 struct encryption_type *et = _find_enctype(key->key->keytype);
1353 struct key_type *kt = et->keytype;
1355 if(kt->schedule == NULL)
1357 if (key->schedule != NULL)
1359 ALLOC(key->schedule, 1);
1360 if(key->schedule == NULL) {
1361 krb5_set_error_string(context, "malloc: out of memory");
1364 ret = krb5_data_alloc(key->schedule, kt->schedule_size);
1366 free(key->schedule);
1367 key->schedule = NULL;
1370 (*kt->schedule)(context, key, params);
1374 /************************************************************
1376 ************************************************************/
1379 NONE_checksum(krb5_context context,
1380 struct key_data *key,
1389 CRC32_checksum(krb5_context context,
1390 struct key_data *key,
1397 unsigned char *r = C->checksum.data;
1398 _krb5_crc_init_table ();
1399 crc = _krb5_crc_update (data, len, 0);
1401 r[1] = (crc >> 8) & 0xff;
1402 r[2] = (crc >> 16) & 0xff;
1403 r[3] = (crc >> 24) & 0xff;
1407 RSA_MD4_checksum(krb5_context context,
1408 struct key_data *key,
1417 MD4_Update (&m, data, len);
1418 MD4_Final (C->checksum.data, &m);
1422 RSA_MD4_DES_checksum(krb5_context context,
1423 struct key_data *key,
1431 unsigned char *p = cksum->checksum.data;
1433 krb5_generate_random_block(p, 8);
1435 MD4_Update (&md4, p, 8);
1436 MD4_Update (&md4, data, len);
1437 MD4_Final (p + 8, &md4);
1438 memset (&ivec, 0, sizeof(ivec));
1442 key->schedule->data,
1447 static krb5_error_code
1448 RSA_MD4_DES_verify(krb5_context context,
1449 struct key_data *key,
1456 unsigned char tmp[24];
1457 unsigned char res[16];
1459 krb5_error_code ret = 0;
1461 memset(&ivec, 0, sizeof(ivec));
1462 DES_cbc_encrypt(C->checksum.data,
1465 key->schedule->data,
1469 MD4_Update (&md4, tmp, 8); /* confounder */
1470 MD4_Update (&md4, data, len);
1471 MD4_Final (res, &md4);
1472 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1473 krb5_clear_error_string (context);
1474 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1476 memset(tmp, 0, sizeof(tmp));
1477 memset(res, 0, sizeof(res));
1482 RSA_MD5_checksum(krb5_context context,
1483 struct key_data *key,
1492 MD5_Update(&m, data, len);
1493 MD5_Final (C->checksum.data, &m);
1497 RSA_MD5_DES_checksum(krb5_context context,
1498 struct key_data *key,
1506 unsigned char *p = C->checksum.data;
1508 krb5_generate_random_block(p, 8);
1510 MD5_Update (&md5, p, 8);
1511 MD5_Update (&md5, data, len);
1512 MD5_Final (p + 8, &md5);
1513 memset (&ivec, 0, sizeof(ivec));
1517 key->schedule->data,
1522 static krb5_error_code
1523 RSA_MD5_DES_verify(krb5_context context,
1524 struct key_data *key,
1531 unsigned char tmp[24];
1532 unsigned char res[16];
1534 DES_key_schedule *sched = key->schedule->data;
1535 krb5_error_code ret = 0;
1537 memset(&ivec, 0, sizeof(ivec));
1538 DES_cbc_encrypt(C->checksum.data,
1545 MD5_Update (&md5, tmp, 8); /* confounder */
1546 MD5_Update (&md5, data, len);
1547 MD5_Final (res, &md5);
1548 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1549 krb5_clear_error_string (context);
1550 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1552 memset(tmp, 0, sizeof(tmp));
1553 memset(res, 0, sizeof(res));
1558 RSA_MD5_DES3_checksum(krb5_context context,
1559 struct key_data *key,
1567 unsigned char *p = C->checksum.data;
1568 DES_key_schedule *sched = key->schedule->data;
1570 krb5_generate_random_block(p, 8);
1572 MD5_Update (&md5, p, 8);
1573 MD5_Update (&md5, data, len);
1574 MD5_Final (p + 8, &md5);
1575 memset (&ivec, 0, sizeof(ivec));
1576 DES_ede3_cbc_encrypt(p,
1579 &sched[0], &sched[1], &sched[2],
1584 static krb5_error_code
1585 RSA_MD5_DES3_verify(krb5_context context,
1586 struct key_data *key,
1593 unsigned char tmp[24];
1594 unsigned char res[16];
1596 DES_key_schedule *sched = key->schedule->data;
1597 krb5_error_code ret = 0;
1599 memset(&ivec, 0, sizeof(ivec));
1600 DES_ede3_cbc_encrypt(C->checksum.data,
1603 &sched[0], &sched[1], &sched[2],
1607 MD5_Update (&md5, tmp, 8); /* confounder */
1608 MD5_Update (&md5, data, len);
1609 MD5_Final (res, &md5);
1610 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1611 krb5_clear_error_string (context);
1612 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1614 memset(tmp, 0, sizeof(tmp));
1615 memset(res, 0, sizeof(res));
1620 SHA1_checksum(krb5_context context,
1621 struct key_data *key,
1630 SHA1_Update(&m, data, len);
1631 SHA1_Final(C->checksum.data, &m);
1634 /* HMAC according to RFC2104 */
1635 static krb5_error_code
1636 hmac(krb5_context context,
1637 struct checksum_type *cm,
1641 struct key_data *keyblock,
1644 unsigned char *ipad, *opad;
1649 ipad = malloc(cm->blocksize + len);
1652 opad = malloc(cm->blocksize + cm->checksumsize);
1657 memset(ipad, 0x36, cm->blocksize);
1658 memset(opad, 0x5c, cm->blocksize);
1660 if(keyblock->key->keyvalue.length > cm->blocksize){
1661 (*cm->checksum)(context,
1663 keyblock->key->keyvalue.data,
1664 keyblock->key->keyvalue.length,
1667 key = result->checksum.data;
1668 key_len = result->checksum.length;
1670 key = keyblock->key->keyvalue.data;
1671 key_len = keyblock->key->keyvalue.length;
1673 for(i = 0; i < key_len; i++){
1677 memcpy(ipad + cm->blocksize, data, len);
1678 (*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
1680 memcpy(opad + cm->blocksize, result->checksum.data,
1681 result->checksum.length);
1682 (*cm->checksum)(context, keyblock, opad,
1683 cm->blocksize + cm->checksumsize, usage, result);
1684 memset(ipad, 0, cm->blocksize + len);
1686 memset(opad, 0, cm->blocksize + cm->checksumsize);
1692 krb5_error_code KRB5_LIB_FUNCTION
1693 krb5_hmac(krb5_context context,
1694 krb5_cksumtype cktype,
1701 struct checksum_type *c = _find_checksum(cktype);
1703 krb5_error_code ret;
1706 krb5_set_error_string (context, "checksum type %d not supported",
1708 return KRB5_PROG_SUMTYPE_NOSUPP;
1714 ret = hmac(context, c, data, len, usage, &kd, result);
1717 krb5_free_data(context, kd.schedule);
1723 SP_HMAC_SHA1_checksum(krb5_context context,
1724 struct key_data *key,
1730 struct checksum_type *c = _find_checksum(CKSUMTYPE_SHA1);
1733 krb5_error_code ret;
1735 res.checksum.data = sha1_data;
1736 res.checksum.length = sizeof(sha1_data);
1738 ret = hmac(context, c, data, len, usage, key, &res);
1740 krb5_abortx(context, "hmac failed");
1741 memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
1745 * checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
1749 HMAC_MD5_checksum(krb5_context context,
1750 struct key_data *key,
1757 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1758 const char signature[] = "signaturekey";
1760 struct key_data ksign;
1763 unsigned char tmp[16];
1764 unsigned char ksign_c_data[16];
1765 krb5_error_code ret;
1767 ksign_c.checksum.length = sizeof(ksign_c_data);
1768 ksign_c.checksum.data = ksign_c_data;
1769 ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
1771 krb5_abortx(context, "hmac failed");
1773 kb.keyvalue = ksign_c.checksum;
1775 t[0] = (usage >> 0) & 0xFF;
1776 t[1] = (usage >> 8) & 0xFF;
1777 t[2] = (usage >> 16) & 0xFF;
1778 t[3] = (usage >> 24) & 0xFF;
1779 MD5_Update (&md5, t, 4);
1780 MD5_Update (&md5, data, len);
1781 MD5_Final (tmp, &md5);
1782 ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
1784 krb5_abortx(context, "hmac failed");
1788 * same as previous but being used while encrypting.
1792 HMAC_MD5_checksum_enc(krb5_context context,
1793 struct key_data *key,
1799 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1801 struct key_data ksign;
1804 unsigned char ksign_c_data[16];
1805 krb5_error_code ret;
1807 t[0] = (usage >> 0) & 0xFF;
1808 t[1] = (usage >> 8) & 0xFF;
1809 t[2] = (usage >> 16) & 0xFF;
1810 t[3] = (usage >> 24) & 0xFF;
1812 ksign_c.checksum.length = sizeof(ksign_c_data);
1813 ksign_c.checksum.data = ksign_c_data;
1814 ret = hmac(context, c, t, sizeof(t), 0, key, &ksign_c);
1816 krb5_abortx(context, "hmac failed");
1818 kb.keyvalue = ksign_c.checksum;
1819 ret = hmac(context, c, data, len, 0, &ksign, result);
1821 krb5_abortx(context, "hmac failed");
1824 static struct checksum_type checksum_none = {
1833 static struct checksum_type checksum_crc32 = {
1842 static struct checksum_type checksum_rsa_md4 = {
1851 static struct checksum_type checksum_rsa_md4_des = {
1852 CKSUMTYPE_RSA_MD4_DES,
1856 F_KEYED | F_CPROOF | F_VARIANT,
1857 RSA_MD4_DES_checksum,
1861 static struct checksum_type checksum_des_mac = {
1869 static struct checksum_type checksum_des_mac_k = {
1870 CKSUMTYPE_DES_MAC_K,
1877 static struct checksum_type checksum_rsa_md4_des_k = {
1878 CKSUMTYPE_RSA_MD4_DES_K,
1883 RSA_MD4_DES_K_checksum,
1884 RSA_MD4_DES_K_verify
1887 static struct checksum_type checksum_rsa_md5 = {
1896 static struct checksum_type checksum_rsa_md5_des = {
1897 CKSUMTYPE_RSA_MD5_DES,
1901 F_KEYED | F_CPROOF | F_VARIANT,
1902 RSA_MD5_DES_checksum,
1905 static struct checksum_type checksum_rsa_md5_des3 = {
1906 CKSUMTYPE_RSA_MD5_DES3,
1910 F_KEYED | F_CPROOF | F_VARIANT,
1911 RSA_MD5_DES3_checksum,
1914 static struct checksum_type checksum_sha1 = {
1923 static struct checksum_type checksum_hmac_sha1_des3 = {
1924 CKSUMTYPE_HMAC_SHA1_DES3,
1928 F_KEYED | F_CPROOF | F_DERIVED,
1929 SP_HMAC_SHA1_checksum,
1933 static struct checksum_type checksum_hmac_sha1_aes128 = {
1934 CKSUMTYPE_HMAC_SHA1_96_AES_128,
1935 "hmac-sha1-96-aes128",
1938 F_KEYED | F_CPROOF | F_DERIVED,
1939 SP_HMAC_SHA1_checksum,
1943 static struct checksum_type checksum_hmac_sha1_aes256 = {
1944 CKSUMTYPE_HMAC_SHA1_96_AES_256,
1945 "hmac-sha1-96-aes256",
1948 F_KEYED | F_CPROOF | F_DERIVED,
1949 SP_HMAC_SHA1_checksum,
1953 static struct checksum_type checksum_hmac_md5 = {
1963 static struct checksum_type checksum_hmac_md5_enc = {
1964 CKSUMTYPE_HMAC_MD5_ENC,
1968 F_KEYED | F_CPROOF | F_PSEUDO,
1969 HMAC_MD5_checksum_enc,
1973 static struct checksum_type *checksum_types[] = {
1977 &checksum_rsa_md4_des,
1980 &checksum_des_mac_k,
1981 &checksum_rsa_md4_des_k,
1984 &checksum_rsa_md5_des,
1985 &checksum_rsa_md5_des3,
1987 &checksum_hmac_sha1_des3,
1988 &checksum_hmac_sha1_aes128,
1989 &checksum_hmac_sha1_aes256,
1991 &checksum_hmac_md5_enc
1994 static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
1996 static struct checksum_type *
1997 _find_checksum(krb5_cksumtype type)
2000 for(i = 0; i < num_checksums; i++)
2001 if(checksum_types[i]->type == type)
2002 return checksum_types[i];
2006 static krb5_error_code
2007 get_checksum_key(krb5_context context,
2009 unsigned usage, /* not krb5_key_usage */
2010 struct checksum_type *ct,
2011 struct key_data **key)
2013 krb5_error_code ret = 0;
2015 if(ct->flags & F_DERIVED)
2016 ret = _get_derived_key(context, crypto, usage, key);
2017 else if(ct->flags & F_VARIANT) {
2020 *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
2022 krb5_set_error_string(context, "malloc: out of memory");
2025 ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
2028 for(i = 0; i < (*key)->key->keyvalue.length; i++)
2029 ((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
2031 *key = &crypto->key;
2034 ret = _key_schedule(context, *key, crypto->params);
2038 static krb5_error_code
2039 create_checksum (krb5_context context,
2040 struct checksum_type *ct,
2047 krb5_error_code ret;
2048 struct key_data *dkey;
2051 if (ct->flags & F_DISABLED) {
2052 krb5_clear_error_string (context);
2053 return KRB5_PROG_SUMTYPE_NOSUPP;
2055 keyed_checksum = (ct->flags & F_KEYED) != 0;
2056 if(keyed_checksum && crypto == NULL) {
2057 krb5_clear_error_string (context);
2058 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
2060 if(keyed_checksum) {
2061 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
2066 result->cksumtype = ct->type;
2067 krb5_data_alloc(&result->checksum, ct->checksumsize);
2068 (*ct->checksum)(context, dkey, data, len, usage, result);
2073 arcfour_checksum_p(struct checksum_type *ct, krb5_crypto crypto)
2075 return (ct->type == CKSUMTYPE_HMAC_MD5) &&
2076 (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
2079 krb5_error_code KRB5_LIB_FUNCTION
2080 krb5_create_checksum(krb5_context context,
2082 krb5_key_usage usage,
2088 struct checksum_type *ct = NULL;
2091 /* type 0 -> pick from crypto */
2093 ct = _find_checksum(type);
2094 } else if (crypto) {
2095 ct = crypto->et->keyed_checksum;
2097 ct = crypto->et->checksum;
2101 krb5_set_error_string (context, "checksum type %d not supported",
2103 return KRB5_PROG_SUMTYPE_NOSUPP;
2106 if (arcfour_checksum_p(ct, crypto)) {
2108 usage2arcfour(context, &keyusage);
2110 keyusage = CHECKSUM_USAGE(usage);
2112 return create_checksum(context, ct, crypto, keyusage,
2116 static krb5_error_code
2117 verify_checksum(krb5_context context,
2119 unsigned usage, /* not krb5_key_usage */
2124 krb5_error_code ret;
2125 struct key_data *dkey;
2128 struct checksum_type *ct;
2130 ct = _find_checksum(cksum->cksumtype);
2131 if (ct == NULL || (ct->flags & F_DISABLED)) {
2132 krb5_set_error_string (context, "checksum type %d not supported",
2134 return KRB5_PROG_SUMTYPE_NOSUPP;
2136 if(ct->checksumsize != cksum->checksum.length) {
2137 krb5_clear_error_string (context);
2138 return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
2140 keyed_checksum = (ct->flags & F_KEYED) != 0;
2141 if(keyed_checksum && crypto == NULL) {
2142 krb5_clear_error_string (context);
2143 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
2146 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
2150 return (*ct->verify)(context, dkey, data, len, usage, cksum);
2152 ret = krb5_data_alloc (&c.checksum, ct->checksumsize);
2156 (*ct->checksum)(context, dkey, data, len, usage, &c);
2158 if(c.checksum.length != cksum->checksum.length ||
2159 memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
2160 krb5_clear_error_string (context);
2161 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2165 krb5_data_free (&c.checksum);
2169 krb5_error_code KRB5_LIB_FUNCTION
2170 krb5_verify_checksum(krb5_context context,
2172 krb5_key_usage usage,
2177 struct checksum_type *ct;
2180 ct = _find_checksum(cksum->cksumtype);
2182 krb5_set_error_string (context, "checksum type %d not supported",
2184 return KRB5_PROG_SUMTYPE_NOSUPP;
2187 if (arcfour_checksum_p(ct, crypto)) {
2189 usage2arcfour(context, &keyusage);
2191 keyusage = CHECKSUM_USAGE(usage);
2193 return verify_checksum(context, crypto, keyusage,
2197 krb5_error_code KRB5_LIB_FUNCTION
2198 krb5_crypto_get_checksum_type(krb5_context context,
2200 krb5_cksumtype *type)
2202 struct checksum_type *ct = NULL;
2204 if (crypto != NULL) {
2205 ct = crypto->et->keyed_checksum;
2207 ct = crypto->et->checksum;
2211 krb5_set_error_string (context, "checksum type not found");
2212 return KRB5_PROG_SUMTYPE_NOSUPP;
2221 krb5_error_code KRB5_LIB_FUNCTION
2222 krb5_checksumsize(krb5_context context,
2223 krb5_cksumtype type,
2226 struct checksum_type *ct = _find_checksum(type);
2228 krb5_set_error_string (context, "checksum type %d not supported",
2230 return KRB5_PROG_SUMTYPE_NOSUPP;
2232 *size = ct->checksumsize;
2236 krb5_boolean KRB5_LIB_FUNCTION
2237 krb5_checksum_is_keyed(krb5_context context,
2238 krb5_cksumtype type)
2240 struct checksum_type *ct = _find_checksum(type);
2243 krb5_set_error_string (context, "checksum type %d not supported",
2245 return KRB5_PROG_SUMTYPE_NOSUPP;
2247 return ct->flags & F_KEYED;
2250 krb5_boolean KRB5_LIB_FUNCTION
2251 krb5_checksum_is_collision_proof(krb5_context context,
2252 krb5_cksumtype type)
2254 struct checksum_type *ct = _find_checksum(type);
2257 krb5_set_error_string (context, "checksum type %d not supported",
2259 return KRB5_PROG_SUMTYPE_NOSUPP;
2261 return ct->flags & F_CPROOF;
2264 krb5_error_code KRB5_LIB_FUNCTION
2265 krb5_checksum_disable(krb5_context context,
2266 krb5_cksumtype type)
2268 struct checksum_type *ct = _find_checksum(type);
2271 krb5_set_error_string (context, "checksum type %d not supported",
2273 return KRB5_PROG_SUMTYPE_NOSUPP;
2275 ct->flags |= F_DISABLED;
2279 /************************************************************
2281 ************************************************************/
2283 static krb5_error_code
2284 NULL_encrypt(krb5_context context,
2285 struct key_data *key,
2288 krb5_boolean encryptp,
2295 static krb5_error_code
2296 DES_CBC_encrypt_null_ivec(krb5_context context,
2297 struct key_data *key,
2300 krb5_boolean encryptp,
2305 DES_key_schedule *s = key->schedule->data;
2306 memset(&ivec, 0, sizeof(ivec));
2307 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2311 static krb5_error_code
2312 DES_CBC_encrypt_key_ivec(krb5_context context,
2313 struct key_data *key,
2316 krb5_boolean encryptp,
2321 DES_key_schedule *s = key->schedule->data;
2322 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2323 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2327 static krb5_error_code
2328 DES3_CBC_encrypt(krb5_context context,
2329 struct key_data *key,
2332 krb5_boolean encryptp,
2336 DES_cblock local_ivec;
2337 DES_key_schedule *s = key->schedule->data;
2340 memset(local_ivec, 0, sizeof(local_ivec));
2342 DES_ede3_cbc_encrypt(data, data, len, &s[0], &s[1], &s[2], ivec, encryptp);
2346 static krb5_error_code
2347 DES_CFB64_encrypt_null_ivec(krb5_context context,
2348 struct key_data *key,
2351 krb5_boolean encryptp,
2357 DES_key_schedule *s = key->schedule->data;
2358 memset(&ivec, 0, sizeof(ivec));
2360 DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
2364 static krb5_error_code
2365 DES_PCBC_encrypt_key_ivec(krb5_context context,
2366 struct key_data *key,
2369 krb5_boolean encryptp,
2374 DES_key_schedule *s = key->schedule->data;
2375 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2377 DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
2382 * AES draft-raeburn-krb-rijndael-krb-02
2385 void KRB5_LIB_FUNCTION
2386 _krb5_aes_cts_encrypt(const unsigned char *in, unsigned char *out,
2387 size_t len, const void *aes_key,
2388 unsigned char *ivec, const int encryptp)
2390 unsigned char tmp[AES_BLOCK_SIZE];
2391 const AES_KEY *key = aes_key; /* XXX remove this when we always have AES */
2395 * In the framework of kerberos, the length can never be shorter
2396 * then at least one blocksize.
2401 while(len > AES_BLOCK_SIZE) {
2402 for (i = 0; i < AES_BLOCK_SIZE; i++)
2403 tmp[i] = in[i] ^ ivec[i];
2404 AES_encrypt(tmp, out, key);
2405 memcpy(ivec, out, AES_BLOCK_SIZE);
2406 len -= AES_BLOCK_SIZE;
2407 in += AES_BLOCK_SIZE;
2408 out += AES_BLOCK_SIZE;
2411 for (i = 0; i < len; i++)
2412 tmp[i] = in[i] ^ ivec[i];
2413 for (; i < AES_BLOCK_SIZE; i++)
2414 tmp[i] = 0 ^ ivec[i];
2416 AES_encrypt(tmp, out - AES_BLOCK_SIZE, key);
2418 memcpy(out, ivec, len);
2419 memcpy(ivec, out - AES_BLOCK_SIZE, AES_BLOCK_SIZE);
2422 unsigned char tmp2[AES_BLOCK_SIZE];
2423 unsigned char tmp3[AES_BLOCK_SIZE];
2425 while(len > AES_BLOCK_SIZE * 2) {
2426 memcpy(tmp, in, AES_BLOCK_SIZE);
2427 AES_decrypt(in, out, key);
2428 for (i = 0; i < AES_BLOCK_SIZE; i++)
2430 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2431 len -= AES_BLOCK_SIZE;
2432 in += AES_BLOCK_SIZE;
2433 out += AES_BLOCK_SIZE;
2436 len -= AES_BLOCK_SIZE;
2438 memcpy(tmp, in, AES_BLOCK_SIZE); /* save last iv */
2439 AES_decrypt(in, tmp2, key);
2441 memcpy(tmp3, in + AES_BLOCK_SIZE, len);
2442 memcpy(tmp3 + len, tmp2 + len, AES_BLOCK_SIZE - len); /* xor 0 */
2444 for (i = 0; i < len; i++)
2445 out[i + AES_BLOCK_SIZE] = tmp2[i] ^ tmp3[i];
2447 AES_decrypt(tmp3, out, key);
2448 for (i = 0; i < AES_BLOCK_SIZE; i++)
2450 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2454 static krb5_error_code
2455 AES_CTS_encrypt(krb5_context context,
2456 struct key_data *key,
2459 krb5_boolean encryptp,
2463 struct krb5_aes_schedule *aeskey = key->schedule->data;
2464 char local_ivec[AES_BLOCK_SIZE];
2472 if (len < AES_BLOCK_SIZE)
2473 krb5_abortx(context, "invalid use of AES_CTS_encrypt");
2474 if (len == AES_BLOCK_SIZE) {
2476 AES_encrypt(data, data, k);
2478 AES_decrypt(data, data, k);
2481 memset(local_ivec, 0, sizeof(local_ivec));
2484 _krb5_aes_cts_encrypt(data, data, len, k, ivec, encryptp);
2490 static krb5_error_code
2491 AES_CBC_encrypt(krb5_context context,
2492 struct key_data *key,
2495 krb5_boolean encryptp,
2499 struct krb5_aes_schedule *aeskey = key->schedule->data;
2500 char local_ivec[AES_BLOCK_SIZE];
2510 memset(local_ivec, 0, sizeof(local_ivec));
2512 AES_cbc_encrypt(data, data, len, k, ivec, encryptp);
2520 static krb5_error_code
2521 RC2_CBC_encrypt(krb5_context context,
2522 struct key_data *key,
2525 krb5_boolean encryptp,
2529 unsigned char local_ivec[8];
2530 RC2_KEY *s = key->schedule->data;
2533 memset(local_ivec, 0, sizeof(local_ivec));
2535 RC2_cbc_encrypt(data, data, len, s, ivec, encryptp);
2540 * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
2542 * warning: not for small children
2545 static krb5_error_code
2546 ARCFOUR_subencrypt(krb5_context context,
2547 struct key_data *key,
2553 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2554 Checksum k1_c, k2_c, k3_c, cksum;
2559 unsigned char *cdata = data;
2560 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2561 krb5_error_code ret;
2563 t[0] = (usage >> 0) & 0xFF;
2564 t[1] = (usage >> 8) & 0xFF;
2565 t[2] = (usage >> 16) & 0xFF;
2566 t[3] = (usage >> 24) & 0xFF;
2568 k1_c.checksum.length = sizeof(k1_c_data);
2569 k1_c.checksum.data = k1_c_data;
2571 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2573 krb5_abortx(context, "hmac failed");
2575 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2577 k2_c.checksum.length = sizeof(k2_c_data);
2578 k2_c.checksum.data = k2_c_data;
2581 kb.keyvalue = k2_c.checksum;
2583 cksum.checksum.length = 16;
2584 cksum.checksum.data = data;
2586 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2588 krb5_abortx(context, "hmac failed");
2591 kb.keyvalue = k1_c.checksum;
2593 k3_c.checksum.length = sizeof(k3_c_data);
2594 k3_c.checksum.data = k3_c_data;
2596 ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
2598 krb5_abortx(context, "hmac failed");
2600 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2601 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2602 memset (k1_c_data, 0, sizeof(k1_c_data));
2603 memset (k2_c_data, 0, sizeof(k2_c_data));
2604 memset (k3_c_data, 0, sizeof(k3_c_data));
2608 static krb5_error_code
2609 ARCFOUR_subdecrypt(krb5_context context,
2610 struct key_data *key,
2616 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2617 Checksum k1_c, k2_c, k3_c, cksum;
2622 unsigned char *cdata = data;
2623 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2624 unsigned char cksum_data[16];
2625 krb5_error_code ret;
2627 t[0] = (usage >> 0) & 0xFF;
2628 t[1] = (usage >> 8) & 0xFF;
2629 t[2] = (usage >> 16) & 0xFF;
2630 t[3] = (usage >> 24) & 0xFF;
2632 k1_c.checksum.length = sizeof(k1_c_data);
2633 k1_c.checksum.data = k1_c_data;
2635 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2637 krb5_abortx(context, "hmac failed");
2639 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2641 k2_c.checksum.length = sizeof(k2_c_data);
2642 k2_c.checksum.data = k2_c_data;
2645 kb.keyvalue = k1_c.checksum;
2647 k3_c.checksum.length = sizeof(k3_c_data);
2648 k3_c.checksum.data = k3_c_data;
2650 ret = hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
2652 krb5_abortx(context, "hmac failed");
2654 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2655 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2658 kb.keyvalue = k2_c.checksum;
2660 cksum.checksum.length = 16;
2661 cksum.checksum.data = cksum_data;
2663 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2665 krb5_abortx(context, "hmac failed");
2667 memset (k1_c_data, 0, sizeof(k1_c_data));
2668 memset (k2_c_data, 0, sizeof(k2_c_data));
2669 memset (k3_c_data, 0, sizeof(k3_c_data));
2671 if (memcmp (cksum.checksum.data, data, 16) != 0) {
2672 krb5_clear_error_string (context);
2673 return KRB5KRB_AP_ERR_BAD_INTEGRITY;
2680 * convert the usage numbers used in
2681 * draft-ietf-cat-kerb-key-derivation-00.txt to the ones in
2682 * draft-brezak-win2k-krb-rc4-hmac-04.txt
2685 static krb5_error_code
2686 usage2arcfour (krb5_context context, unsigned *usage)
2689 case KRB5_KU_AS_REP_ENC_PART : /* 3 */
2690 case KRB5_KU_TGS_REP_ENC_PART_SUB_KEY : /* 9 */
2693 case KRB5_KU_USAGE_SEAL : /* 22 */
2696 case KRB5_KU_USAGE_SIGN : /* 23 */
2699 case KRB5_KU_USAGE_SEQ: /* 24 */
2707 static krb5_error_code
2708 ARCFOUR_encrypt(krb5_context context,
2709 struct key_data *key,
2712 krb5_boolean encryptp,
2716 krb5_error_code ret;
2717 unsigned keyusage = usage;
2719 if((ret = usage2arcfour (context, &keyusage)) != 0)
2723 return ARCFOUR_subencrypt (context, key, data, len, keyusage, ivec);
2725 return ARCFOUR_subdecrypt (context, key, data, len, keyusage, ivec);
2730 * these should currently be in reverse preference order.
2731 * (only relevant for !F_PSEUDO) */
2733 static struct encryption_type enctype_null = {
2746 static struct encryption_type enctype_des_cbc_crc = {
2757 DES_CBC_encrypt_key_ivec,
2759 static struct encryption_type enctype_des_cbc_md4 = {
2768 &checksum_rsa_md4_des,
2770 DES_CBC_encrypt_null_ivec,
2772 static struct encryption_type enctype_des_cbc_md5 = {
2781 &checksum_rsa_md5_des,
2783 DES_CBC_encrypt_null_ivec,
2785 static struct encryption_type enctype_arcfour_hmac_md5 = {
2786 ETYPE_ARCFOUR_HMAC_MD5,
2798 static struct encryption_type enctype_des3_cbc_md5 = {
2807 &checksum_rsa_md5_des3,
2811 static struct encryption_type enctype_des3_cbc_sha1 = {
2812 ETYPE_DES3_CBC_SHA1,
2818 &keytype_des3_derived,
2820 &checksum_hmac_sha1_des3,
2824 static struct encryption_type enctype_old_des3_cbc_sha1 = {
2825 ETYPE_OLD_DES3_CBC_SHA1,
2826 "old-des3-cbc-sha1",
2833 &checksum_hmac_sha1_des3,
2837 static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
2838 ETYPE_AES128_CTS_HMAC_SHA1_96,
2839 "aes128-cts-hmac-sha1-96",
2846 &checksum_hmac_sha1_aes128,
2850 static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
2851 ETYPE_AES256_CTS_HMAC_SHA1_96,
2852 "aes256-cts-hmac-sha1-96",
2859 &checksum_hmac_sha1_aes256,
2863 static unsigned aes_128_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 2 };
2864 static heim_oid aes_128_cbc_oid = kcrypto_oid_enc(aes_128_cbc_num);
2865 static struct encryption_type enctype_aes128_cbc_none = {
2866 ETYPE_AES128_CBC_NONE,
2878 static unsigned aes_192_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 22 };
2879 static heim_oid aes_192_cbc_oid = kcrypto_oid_enc(aes_192_cbc_num);
2880 static struct encryption_type enctype_aes192_cbc_none = {
2881 ETYPE_AES192_CBC_NONE,
2893 static unsigned aes_256_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 42 };
2894 static heim_oid aes_256_cbc_oid = kcrypto_oid_enc(aes_256_cbc_num);
2895 static struct encryption_type enctype_aes256_cbc_none = {
2896 ETYPE_AES256_CBC_NONE,
2908 static struct encryption_type enctype_des_cbc_none = {
2919 DES_CBC_encrypt_null_ivec,
2921 static struct encryption_type enctype_des_cfb64_none = {
2922 ETYPE_DES_CFB64_NONE,
2932 DES_CFB64_encrypt_null_ivec,
2934 static struct encryption_type enctype_des_pcbc_none = {
2935 ETYPE_DES_PCBC_NONE,
2945 DES_PCBC_encrypt_key_ivec,
2947 static unsigned des_ede3_cbc_num[] = { 1, 2, 840, 113549, 3, 7 };
2948 static heim_oid des_ede3_cbc_oid = kcrypto_oid_enc(des_ede3_cbc_num);
2949 static struct encryption_type enctype_des3_cbc_none_cms = {
2950 ETYPE_DES3_CBC_NONE_CMS,
2951 "des3-cbc-none-cms",
2956 &keytype_des3_derived,
2962 static struct encryption_type enctype_des3_cbc_none = {
2963 ETYPE_DES3_CBC_NONE,
2969 &keytype_des3_derived,
2975 static unsigned rc2CBC_num[] = { 1, 2, 840, 113549, 3, 2 };
2976 static heim_oid rc2CBC_oid = kcrypto_oid_enc(rc2CBC_num);
2977 static struct encryption_type enctype_rc2_cbc_none = {
2991 static struct encryption_type *etypes[] = {
2993 &enctype_des_cbc_crc,
2994 &enctype_des_cbc_md4,
2995 &enctype_des_cbc_md5,
2996 &enctype_arcfour_hmac_md5,
2997 &enctype_des3_cbc_md5,
2998 &enctype_des3_cbc_sha1,
2999 &enctype_old_des3_cbc_sha1,
3000 &enctype_aes128_cts_hmac_sha1,
3001 &enctype_aes256_cts_hmac_sha1,
3002 &enctype_aes128_cbc_none,
3003 &enctype_aes192_cbc_none,
3004 &enctype_aes256_cbc_none,
3005 &enctype_des_cbc_none,
3006 &enctype_des_cfb64_none,
3007 &enctype_des_pcbc_none,
3008 &enctype_des3_cbc_none,
3009 &enctype_des3_cbc_none_cms,
3010 &enctype_rc2_cbc_none
3013 static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
3016 static struct encryption_type *
3017 _find_enctype(krb5_enctype type)
3020 for(i = 0; i < num_etypes; i++)
3021 if(etypes[i]->type == type)
3027 krb5_error_code KRB5_LIB_FUNCTION
3028 krb5_enctype_to_string(krb5_context context,
3032 struct encryption_type *e;
3033 e = _find_enctype(etype);
3035 krb5_set_error_string (context, "encryption type %d not supported",
3037 return KRB5_PROG_ETYPE_NOSUPP;
3039 *string = strdup(e->name);
3040 if(*string == NULL) {
3041 krb5_set_error_string(context, "malloc: out of memory");
3047 krb5_error_code KRB5_LIB_FUNCTION
3048 krb5_string_to_enctype(krb5_context context,
3050 krb5_enctype *etype)
3053 for(i = 0; i < num_etypes; i++)
3054 if(strcasecmp(etypes[i]->name, string) == 0){
3055 *etype = etypes[i]->type;
3058 krb5_set_error_string (context, "encryption type %s not supported",
3060 return KRB5_PROG_ETYPE_NOSUPP;
3063 krb5_error_code KRB5_LIB_FUNCTION
3064 krb5_enctype_to_oid(krb5_context context,
3068 struct encryption_type *et = _find_enctype(etype);
3070 krb5_set_error_string (context, "encryption type %d not supported",
3072 return KRB5_PROG_ETYPE_NOSUPP;
3074 if(et->oid == NULL) {
3075 krb5_set_error_string (context, "%s have not oid", et->name);
3076 return KRB5_PROG_ETYPE_NOSUPP;
3078 krb5_clear_error_string(context);
3079 return copy_oid(et->oid, oid);
3082 krb5_error_code KRB5_LIB_FUNCTION
3083 _krb5_oid_to_enctype(krb5_context context,
3084 const heim_oid *oid,
3085 krb5_enctype *etype)
3088 for(i = 0; i < num_etypes; i++) {
3089 if(etypes[i]->oid && heim_oid_cmp(etypes[i]->oid, oid) == 0) {
3090 *etype = etypes[i]->type;
3094 krb5_set_error_string(context, "enctype for oid not supported");
3095 return KRB5_PROG_ETYPE_NOSUPP;
3098 krb5_error_code KRB5_LIB_FUNCTION
3099 krb5_enctype_to_keytype(krb5_context context,
3101 krb5_keytype *keytype)
3103 struct encryption_type *e = _find_enctype(etype);
3105 krb5_set_error_string (context, "encryption type %d not supported",
3107 return KRB5_PROG_ETYPE_NOSUPP;
3109 *keytype = e->keytype->type; /* XXX */
3114 krb5_error_code KRB5_LIB_FUNCTION
3115 krb5_keytype_to_enctype(krb5_context context,
3116 krb5_keytype keytype,
3117 krb5_enctype *etype)
3119 struct key_type *kt = _find_keytype(keytype);
3120 krb5_warnx(context, "krb5_keytype_to_enctype(%u)", keytype);
3122 return KRB5_PROG_KEYTYPE_NOSUPP;
3123 *etype = kt->best_etype;
3128 krb5_error_code KRB5_LIB_FUNCTION
3129 krb5_keytype_to_enctypes (krb5_context context,
3130 krb5_keytype keytype,
3138 for (i = num_etypes - 1; i >= 0; --i) {
3139 if (etypes[i]->keytype->type == keytype
3140 && !(etypes[i]->flags & F_PSEUDO))
3143 ret = malloc(n * sizeof(*ret));
3144 if (ret == NULL && n != 0) {
3145 krb5_set_error_string(context, "malloc: out of memory");
3149 for (i = num_etypes - 1; i >= 0; --i) {
3150 if (etypes[i]->keytype->type == keytype
3151 && !(etypes[i]->flags & F_PSEUDO))
3152 ret[n++] = etypes[i]->type;
3160 * First take the configured list of etypes for `keytype' if available,
3161 * else, do `krb5_keytype_to_enctypes'.
3164 krb5_error_code KRB5_LIB_FUNCTION
3165 krb5_keytype_to_enctypes_default (krb5_context context,
3166 krb5_keytype keytype,
3173 if (keytype != KEYTYPE_DES || context->etypes_des == NULL)
3174 return krb5_keytype_to_enctypes (context, keytype, len, val);
3176 for (n = 0; context->etypes_des[n]; ++n)
3178 ret = malloc (n * sizeof(*ret));
3179 if (ret == NULL && n != 0) {
3180 krb5_set_error_string(context, "malloc: out of memory");
3183 for (i = 0; i < n; ++i)
3184 ret[i] = context->etypes_des[i];
3190 krb5_error_code KRB5_LIB_FUNCTION
3191 krb5_enctype_valid(krb5_context context,
3194 struct encryption_type *e = _find_enctype(etype);
3196 krb5_set_error_string (context, "encryption type %d not supported",
3198 return KRB5_PROG_ETYPE_NOSUPP;
3200 if (e->flags & F_DISABLED) {
3201 krb5_set_error_string (context, "encryption type %s is disabled",
3203 return KRB5_PROG_ETYPE_NOSUPP;
3208 krb5_error_code KRB5_LIB_FUNCTION
3209 krb5_cksumtype_valid(krb5_context context,
3210 krb5_cksumtype ctype)
3212 struct checksum_type *c = _find_checksum(ctype);
3214 krb5_set_error_string (context, "checksum type %d not supported",
3216 return KRB5_PROG_SUMTYPE_NOSUPP;
3218 if (c->flags & F_DISABLED) {
3219 krb5_set_error_string (context, "checksum type %s is disabled",
3221 return KRB5_PROG_SUMTYPE_NOSUPP;
3227 /* if two enctypes have compatible keys */
3228 krb5_boolean KRB5_LIB_FUNCTION
3229 krb5_enctypes_compatible_keys(krb5_context context,
3230 krb5_enctype etype1,
3231 krb5_enctype etype2)
3233 struct encryption_type *e1 = _find_enctype(etype1);
3234 struct encryption_type *e2 = _find_enctype(etype2);
3235 return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
3239 derived_crypto(krb5_context context,
3242 return (crypto->et->flags & F_DERIVED) != 0;
3246 special_crypto(krb5_context context,
3249 return (crypto->et->flags & F_SPECIAL) != 0;
3252 #define CHECKSUMSIZE(C) ((C)->checksumsize)
3253 #define CHECKSUMTYPE(C) ((C)->type)
3255 static krb5_error_code
3256 encrypt_internal_derived(krb5_context context,
3264 size_t sz, block_sz, checksum_sz, total_sz;
3266 unsigned char *p, *q;
3267 krb5_error_code ret;
3268 struct key_data *dkey;
3269 const struct encryption_type *et = crypto->et;
3271 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3273 sz = et->confoundersize + len;
3274 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3275 total_sz = block_sz + checksum_sz;
3276 p = calloc(1, total_sz);
3278 krb5_set_error_string(context, "malloc: out of memory");
3283 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3284 q += et->confoundersize;
3285 memcpy(q, data, len);
3287 ret = create_checksum(context,
3290 INTEGRITY_USAGE(usage),
3294 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3295 free_Checksum (&cksum);
3296 krb5_clear_error_string (context);
3297 ret = KRB5_CRYPTO_INTERNAL;
3301 memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
3302 free_Checksum (&cksum);
3303 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3306 ret = _key_schedule(context, dkey, crypto->params);
3310 krb5_crypto_debug(context, 1, block_sz, dkey->key);
3312 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
3316 result->length = total_sz;
3319 memset(p, 0, total_sz);
3325 static krb5_error_code
3326 encrypt_internal(krb5_context context,
3333 size_t sz, block_sz, checksum_sz, padsize = 0;
3335 unsigned char *p, *q;
3336 krb5_error_code ret;
3337 const struct encryption_type *et = crypto->et;
3339 checksum_sz = CHECKSUMSIZE(et->checksum);
3341 sz = et->confoundersize + checksum_sz + len;
3342 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3343 if ((et->flags & F_PADCMS) && et->padsize != 1) {
3344 padsize = et->padsize - (sz % et->padsize);
3345 if (padsize == et->padsize)
3346 block_sz += et->padsize;
3348 p = calloc(1, block_sz);
3350 krb5_set_error_string(context, "malloc: out of memory");
3355 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3356 q += et->confoundersize;
3357 memset(q, 0, checksum_sz);
3359 memcpy(q, data, len);
3361 ret = create_checksum(context,
3368 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3369 krb5_clear_error_string (context);
3370 free_Checksum(&cksum);
3371 ret = KRB5_CRYPTO_INTERNAL;
3375 memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
3376 free_Checksum(&cksum);
3377 ret = _key_schedule(context, &crypto->key, crypto->params);
3380 if (et->flags & F_PADCMS) {
3382 q = p + len + checksum_sz + et->confoundersize;
3383 for (i = 0; i < padsize; i++)
3387 krb5_crypto_debug(context, 1, block_sz, crypto->key.key);
3389 ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
3391 memset(p, 0, block_sz);
3396 result->length = block_sz;
3399 memset(p, 0, block_sz);
3404 static krb5_error_code
3405 encrypt_internal_special(krb5_context context,
3413 struct encryption_type *et = crypto->et;
3414 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3415 size_t sz = len + cksum_sz + et->confoundersize;
3417 krb5_error_code ret;
3421 krb5_set_error_string(context, "malloc: out of memory");
3425 memset (p, 0, cksum_sz);
3427 krb5_generate_random_block(p, et->confoundersize);
3428 p += et->confoundersize;
3429 memcpy (p, data, len);
3430 ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
3437 result->length = sz;
3441 static krb5_error_code
3442 decrypt_internal_derived(krb5_context context,
3453 krb5_error_code ret;
3454 struct key_data *dkey;
3455 struct encryption_type *et = crypto->et;
3458 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3459 if (len < checksum_sz) {
3460 krb5_clear_error_string (context);
3461 return EINVAL; /* XXX - better error code? */
3464 if (((len - checksum_sz) % et->padsize) != 0) {
3465 krb5_clear_error_string(context);
3466 return KRB5_BAD_MSIZE;
3470 if(len != 0 && p == NULL) {
3471 krb5_set_error_string(context, "malloc: out of memory");
3474 memcpy(p, data, len);
3478 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3483 ret = _key_schedule(context, dkey, crypto->params);
3489 krb5_crypto_debug(context, 0, len, dkey->key);
3491 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3497 cksum.checksum.data = p + len;
3498 cksum.checksum.length = checksum_sz;
3499 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3501 ret = verify_checksum(context,
3503 INTEGRITY_USAGE(usage),
3511 l = len - et->confoundersize;
3512 memmove(p, p + et->confoundersize, l);
3513 result->data = realloc(p, l);
3514 if(result->data == NULL) {
3516 krb5_set_error_string(context, "malloc: out of memory");
3523 static krb5_error_code
3524 decrypt_internal(krb5_context context,
3531 krb5_error_code ret;
3534 size_t checksum_sz, l;
3535 struct encryption_type *et = crypto->et;
3537 if ((len % et->padsize) != 0) {
3538 krb5_clear_error_string(context);
3539 return KRB5_BAD_MSIZE;
3542 checksum_sz = CHECKSUMSIZE(et->checksum);
3544 if(len != 0 && p == NULL) {
3545 krb5_set_error_string(context, "malloc: out of memory");
3548 memcpy(p, data, len);
3550 ret = _key_schedule(context, &crypto->key, crypto->params);
3556 krb5_crypto_debug(context, 0, len, crypto->key.key);
3558 ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
3563 ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
3568 memset(p + et->confoundersize, 0, checksum_sz);
3569 cksum.cksumtype = CHECKSUMTYPE(et->checksum);
3570 ret = verify_checksum(context, NULL, 0, p, len, &cksum);
3571 free_Checksum(&cksum);
3576 l = len - et->confoundersize - checksum_sz;
3577 memmove(p, p + et->confoundersize + checksum_sz, l);
3578 result->data = realloc(p, l);
3579 if(result->data == NULL) {
3581 krb5_set_error_string(context, "malloc: out of memory");
3588 static krb5_error_code
3589 decrypt_internal_special(krb5_context context,
3597 struct encryption_type *et = crypto->et;
3598 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3599 size_t sz = len - cksum_sz - et->confoundersize;
3601 krb5_error_code ret;
3603 if ((len % et->padsize) != 0) {
3604 krb5_clear_error_string(context);
3605 return KRB5_BAD_MSIZE;
3610 krb5_set_error_string(context, "malloc: out of memory");
3613 memcpy(p, data, len);
3615 ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
3621 memmove (p, p + cksum_sz + et->confoundersize, sz);
3622 result->data = realloc(p, sz);
3623 if(result->data == NULL) {
3625 krb5_set_error_string(context, "malloc: out of memory");
3628 result->length = sz;
3633 krb5_error_code KRB5_LIB_FUNCTION
3634 krb5_encrypt_ivec(krb5_context context,
3642 if(derived_crypto(context, crypto))
3643 return encrypt_internal_derived(context, crypto, usage,
3644 data, len, result, ivec);
3645 else if (special_crypto(context, crypto))
3646 return encrypt_internal_special (context, crypto, usage,
3647 data, len, result, ivec);
3649 return encrypt_internal(context, crypto, data, len, result, ivec);
3652 krb5_error_code KRB5_LIB_FUNCTION
3653 krb5_encrypt(krb5_context context,
3660 return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
3663 krb5_error_code KRB5_LIB_FUNCTION
3664 krb5_encrypt_EncryptedData(krb5_context context,
3670 EncryptedData *result)
3672 result->etype = CRYPTO_ETYPE(crypto);
3674 ALLOC(result->kvno, 1);
3675 *result->kvno = kvno;
3677 result->kvno = NULL;
3678 return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
3681 krb5_error_code KRB5_LIB_FUNCTION
3682 krb5_decrypt_ivec(krb5_context context,
3690 if(derived_crypto(context, crypto))
3691 return decrypt_internal_derived(context, crypto, usage,
3692 data, len, result, ivec);
3693 else if (special_crypto (context, crypto))
3694 return decrypt_internal_special(context, crypto, usage,
3695 data, len, result, ivec);
3697 return decrypt_internal(context, crypto, data, len, result, ivec);
3700 krb5_error_code KRB5_LIB_FUNCTION
3701 krb5_decrypt(krb5_context context,
3708 return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
3712 krb5_error_code KRB5_LIB_FUNCTION
3713 krb5_decrypt_EncryptedData(krb5_context context,
3716 const EncryptedData *e,
3719 return krb5_decrypt(context, crypto, usage,
3720 e->cipher.data, e->cipher.length, result);
3723 /************************************************************
3725 ************************************************************/
3728 #include <openssl/rand.h>
3730 /* From openssl/crypto/rand/rand_lcl.h */
3731 #define ENTROPY_NEEDED 20
3733 seed_something(void)
3735 char buf[1024], seedfile[256];
3737 /* If there is a seed file, load it. But such a file cannot be trusted,
3738 so use 0 for the entropy estimate */
3739 if (RAND_file_name(seedfile, sizeof(seedfile))) {
3741 fd = open(seedfile, O_RDONLY);
3744 ret = read(fd, buf, sizeof(buf));
3746 RAND_add(buf, ret, 0.0);
3753 /* Calling RAND_status() will try to use /dev/urandom if it exists so
3754 we do not have to deal with it. */
3755 if (RAND_status() != 1) {
3756 krb5_context context;
3760 if (!krb5_init_context(&context)) {
3761 p = krb5_config_get_string(context, NULL, "libdefaults",
3762 "egd_socket", NULL);
3764 RAND_egd_bytes(p, ENTROPY_NEEDED);
3765 krb5_free_context(context);
3769 if (RAND_status() == 1) {
3770 /* Update the seed file */
3772 RAND_write_file(seedfile);
3779 void KRB5_LIB_FUNCTION
3780 krb5_generate_random_block(void *buf, size_t len)
3782 static int rng_initialized = 0;
3784 HEIMDAL_MUTEX_lock(&crypto_mutex);
3785 if (!rng_initialized) {
3786 if (seed_something())
3787 krb5_abortx(NULL, "Fatal: could not seed the random number generator");
3789 rng_initialized = 1;
3791 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3792 RAND_bytes(buf, len);
3797 void KRB5_LIB_FUNCTION
3798 krb5_generate_random_block(void *buf, size_t len)
3800 DES_cblock key, out;
3801 static DES_cblock counter;
3802 static DES_key_schedule schedule;
3804 static int initialized = 0;
3806 HEIMDAL_MUTEX_lock(&crypto_mutex);
3808 DES_new_random_key(&key);
3809 DES_set_key(&key, &schedule);
3810 memset(&key, 0, sizeof(key));
3811 DES_new_random_key(&counter);
3814 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3816 DES_ecb_encrypt(&counter, &out, &schedule, DES_ENCRYPT);
3817 for(i = 7; i >=0; i--)
3820 memcpy(buf, out, min(len, sizeof(out)));
3821 len -= min(len, sizeof(out));
3822 buf = (char*)buf + sizeof(out);
3828 DES3_postproc(krb5_context context,
3829 unsigned char *k, size_t len, struct key_data *key)
3831 DES3_random_to_key(context, key->key, k, len);
3833 if (key->schedule) {
3834 krb5_free_data(context, key->schedule);
3835 key->schedule = NULL;
3839 static krb5_error_code
3840 derive_key(krb5_context context,
3841 struct encryption_type *et,
3842 struct key_data *key,
3843 const void *constant,
3847 unsigned int nblocks = 0, i;
3848 krb5_error_code ret = 0;
3850 struct key_type *kt = et->keytype;
3851 /* since RC2 is only the weird crypto alg with parameter and this
3852 * function not defined with work with RC2, this is ok */
3853 ret = _key_schedule(context, key, NULL);
3856 if(et->blocksize * 8 < kt->bits ||
3857 len != et->blocksize) {
3858 nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
3859 k = malloc(nblocks * et->blocksize);
3861 krb5_set_error_string(context, "malloc: out of memory");
3864 _krb5_n_fold(constant, len, k, et->blocksize);
3865 for(i = 0; i < nblocks; i++) {
3867 memcpy(k + i * et->blocksize,
3868 k + (i - 1) * et->blocksize,
3870 (*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
3874 /* this case is probably broken, but won't be run anyway */
3875 void *c = malloc(len);
3876 size_t res_len = (kt->bits + 7) / 8;
3878 if(len != 0 && c == NULL) {
3879 krb5_set_error_string(context, "malloc: out of memory");
3882 memcpy(c, constant, len);
3883 (*et->encrypt)(context, key, c, len, 1, 0, NULL);
3884 k = malloc(res_len);
3885 if(res_len != 0 && k == NULL) {
3887 krb5_set_error_string(context, "malloc: out of memory");
3890 _krb5_n_fold(c, len, k, res_len);
3894 /* XXX keytype dependent post-processing */
3897 DES3_postproc(context, k, nblocks * et->blocksize, key);
3899 case KEYTYPE_AES128:
3900 case KEYTYPE_AES256:
3901 memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
3904 krb5_set_error_string(context,
3905 "derive_key() called with unknown keytype (%u)",
3907 ret = KRB5_CRYPTO_INTERNAL;
3910 if (key->schedule) {
3911 krb5_free_data(context, key->schedule);
3912 key->schedule = NULL;
3914 memset(k, 0, nblocks * et->blocksize);
3919 static struct key_data *
3920 _new_derived_key(krb5_crypto crypto, unsigned usage)
3922 struct key_usage *d = crypto->key_usage;
3923 d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
3926 crypto->key_usage = d;
3927 d += crypto->num_key_usage++;
3928 memset(d, 0, sizeof(*d));
3933 krb5_error_code KRB5_LIB_FUNCTION
3934 krb5_derive_key(krb5_context context,
3935 const krb5_keyblock *key,
3937 const void *constant,
3938 size_t constant_len,
3939 krb5_keyblock **derived_key)
3941 krb5_error_code ret;
3942 struct encryption_type *et;
3945 *derived_key = NULL;
3947 et = _find_enctype (etype);
3949 krb5_set_error_string(context, "encryption type %d not supported",
3951 return KRB5_PROG_ETYPE_NOSUPP;
3954 ret = krb5_copy_keyblock(context, key, &d.key);
3959 ret = derive_key(context, et, &d, constant, constant_len);
3961 ret = krb5_copy_keyblock(context, d.key, derived_key);
3962 free_key_data(context, &d);
3966 static krb5_error_code
3967 _get_derived_key(krb5_context context,
3970 struct key_data **key)
3974 unsigned char constant[5];
3976 for(i = 0; i < crypto->num_key_usage; i++)
3977 if(crypto->key_usage[i].usage == usage) {
3978 *key = &crypto->key_usage[i].key;
3981 d = _new_derived_key(crypto, usage);
3983 krb5_set_error_string(context, "malloc: out of memory");
3986 krb5_copy_keyblock(context, crypto->key.key, &d->key);
3987 _krb5_put_int(constant, usage, 5);
3988 derive_key(context, crypto->et, d, constant, sizeof(constant));
3994 krb5_error_code KRB5_LIB_FUNCTION
3995 krb5_crypto_init(krb5_context context,
3996 const krb5_keyblock *key,
3998 krb5_crypto *crypto)
4000 krb5_error_code ret;
4002 if(*crypto == NULL) {
4003 krb5_set_error_string(context, "malloc: out of memory");
4006 if(etype == ETYPE_NULL)
4007 etype = key->keytype;
4008 (*crypto)->et = _find_enctype(etype);
4009 if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
4012 krb5_set_error_string (context, "encryption type %d not supported",
4014 return KRB5_PROG_ETYPE_NOSUPP;
4016 if((*crypto)->et->keytype->minsize > key->keyvalue.length) {
4019 krb5_set_error_string (context, "encryption key has bad length");
4020 return KRB5_BAD_KEYSIZE;
4022 ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
4028 (*crypto)->key.schedule = NULL;
4029 (*crypto)->num_key_usage = 0;
4030 (*crypto)->key_usage = NULL;
4031 (*crypto)->params = NULL;
4036 free_key_data(krb5_context context, struct key_data *key)
4038 krb5_free_keyblock(context, key->key);
4040 memset(key->schedule->data, 0, key->schedule->length);
4041 krb5_free_data(context, key->schedule);
4046 free_key_usage(krb5_context context, struct key_usage *ku)
4048 free_key_data(context, &ku->key);
4051 krb5_error_code KRB5_LIB_FUNCTION
4052 krb5_crypto_destroy(krb5_context context,
4057 for(i = 0; i < crypto->num_key_usage; i++)
4058 free_key_usage(context, &crypto->key_usage[i]);
4059 free(crypto->key_usage);
4060 free_key_data(context, &crypto->key);
4061 free(crypto->params);
4066 krb5_error_code KRB5_LIB_FUNCTION
4067 krb5_crypto_get_params(krb5_context context,
4068 const krb5_crypto crypto,
4069 const krb5_data *params,
4072 krb5_error_code (*gp)(krb5_context, const krb5_data *,void **,krb5_data *);
4073 krb5_error_code ret;
4075 gp = crypto->et->keytype->get_params;
4077 if (crypto->params) {
4078 krb5_set_error_string(context,
4079 "krb5_crypto_get_params called "
4081 return KRB5_PROG_ETYPE_NOSUPP;
4083 ret = (*gp)(context, params, &crypto->params, ivec);
4088 ret = decode_CBCParameter(params->data, params->length, ivec, &size);
4092 if (ivec->length < crypto->et->blocksize) {
4093 krb5_data_free(ivec);
4094 krb5_set_error_string(context, "%s IV of wrong size",
4096 return ASN1_PARSE_ERROR;
4101 krb5_error_code KRB5_LIB_FUNCTION
4102 krb5_crypto_set_params(krb5_context context,
4103 const krb5_crypto crypto,
4104 const krb5_data *ivec,
4107 krb5_error_code (*sp)(krb5_context, const void *,
4108 const krb5_data *, krb5_data *);
4109 krb5_error_code ret;
4111 sp = crypto->et->keytype->set_params;
4116 ASN1_MALLOC_ENCODE(CBCParameter, params->data, params->length,
4120 if (size != params->length)
4121 krb5_abortx(context, "Internal asn1 encoder failure");
4124 if (crypto->params) {
4125 krb5_set_error_string(context,
4126 "krb5_crypto_set_params called "
4128 return KRB5_PROG_ETYPE_NOSUPP;
4130 return (*sp)(context, crypto->params, ivec, params);
4134 krb5_error_code KRB5_LIB_FUNCTION
4135 krb5_crypto_getblocksize(krb5_context context,
4139 *blocksize = crypto->et->blocksize;
4143 krb5_error_code KRB5_LIB_FUNCTION
4144 krb5_crypto_getenctype(krb5_context context,
4146 krb5_enctype *enctype)
4148 *enctype = crypto->et->type;
4152 krb5_error_code KRB5_LIB_FUNCTION
4153 krb5_crypto_getpadsize(krb5_context context,
4157 *padsize = crypto->et->padsize;
4161 krb5_error_code KRB5_LIB_FUNCTION
4162 krb5_crypto_getconfoundersize(krb5_context context,
4164 size_t *confoundersize)
4166 *confoundersize = crypto->et->confoundersize;
4170 krb5_error_code KRB5_LIB_FUNCTION
4171 krb5_enctype_disable(krb5_context context,
4172 krb5_enctype enctype)
4174 struct encryption_type *et = _find_enctype(enctype);
4177 krb5_set_error_string (context, "encryption type %d not supported",
4179 return KRB5_PROG_ETYPE_NOSUPP;
4181 et->flags |= F_DISABLED;
4185 krb5_error_code KRB5_LIB_FUNCTION
4186 krb5_string_to_key_derived(krb5_context context,
4192 struct encryption_type *et = _find_enctype(etype);
4193 krb5_error_code ret;
4195 size_t keylen = et->keytype->bits / 8;
4199 krb5_set_error_string (context, "encryption type %d not supported",
4201 return KRB5_PROG_ETYPE_NOSUPP;
4204 if(kd.key == NULL) {
4205 krb5_set_error_string (context, "malloc: out of memory");
4208 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
4213 kd.key->keytype = etype;
4214 tmp = malloc (keylen);
4216 krb5_free_keyblock(context, kd.key);
4217 krb5_set_error_string (context, "malloc: out of memory");
4220 _krb5_n_fold(str, len, tmp, keylen);
4222 DES3_postproc (context, tmp, keylen, &kd); /* XXX */
4223 memset(tmp, 0, keylen);
4225 ret = derive_key(context,
4228 "kerberos", /* XXX well known constant */
4229 strlen("kerberos"));
4230 ret = krb5_copy_keyblock_contents(context, kd.key, key);
4231 free_key_data(context, &kd);
4236 wrapped_length (krb5_context context,
4240 struct encryption_type *et = crypto->et;
4241 size_t padsize = et->padsize;
4242 size_t checksumsize = CHECKSUMSIZE(et->checksum);
4245 res = et->confoundersize + checksumsize + data_len;
4246 res = (res + padsize - 1) / padsize * padsize;
4251 wrapped_length_dervied (krb5_context context,
4255 struct encryption_type *et = crypto->et;
4256 size_t padsize = et->padsize;
4259 res = et->confoundersize + data_len;
4260 res = (res + padsize - 1) / padsize * padsize;
4261 if (et->keyed_checksum)
4262 res += et->keyed_checksum->checksumsize;
4264 res += et->checksum->checksumsize;
4269 * Return the size of an encrypted packet of length `data_len'
4273 krb5_get_wrapped_length (krb5_context context,
4277 if (derived_crypto (context, crypto))
4278 return wrapped_length_dervied (context, crypto, data_len);
4280 return wrapped_length (context, crypto, data_len);
4283 krb5_error_code KRB5_LIB_FUNCTION
4284 krb5_random_to_key(krb5_context context,
4290 krb5_error_code ret;
4291 struct encryption_type *et = _find_enctype(type);
4293 krb5_set_error_string(context, "encryption type %d not supported",
4295 return KRB5_PROG_ETYPE_NOSUPP;
4297 if ((et->keytype->bits + 7) / 8 > size) {
4298 krb5_set_error_string(context, "encryption key %s needs %d bytes "
4299 "of random to make an encryption key out of it",
4300 et->name, (int)et->keytype->size);
4301 return KRB5_PROG_ETYPE_NOSUPP;
4303 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
4306 key->keytype = type;
4307 if (et->keytype->random_to_key)
4308 (*et->keytype->random_to_key)(context, key, data, size);
4310 memcpy(key->keyvalue.data, data, et->keytype->size);
4316 _krb5_pk_octetstring2key(krb5_context context,
4320 const heim_octet_string *c_n,
4321 const heim_octet_string *k_n,
4324 struct encryption_type *et = _find_enctype(type);
4325 krb5_error_code ret;
4326 size_t keylen, offset;
4328 unsigned char counter;
4329 unsigned char shaoutput[20];
4332 krb5_set_error_string(context, "encryption type %d not supported",
4334 return KRB5_PROG_ETYPE_NOSUPP;
4336 keylen = (et->keytype->bits + 7) / 8;
4338 keydata = malloc(keylen);
4339 if (keydata == NULL) {
4340 krb5_set_error_string(context, "malloc: out of memory");
4350 SHA1_Update(&m, &counter, 1);
4351 SHA1_Update(&m, dhdata, dhsize);
4353 SHA1_Update(&m, c_n->data, c_n->length);
4355 SHA1_Update(&m, k_n->data, k_n->length);
4356 SHA1_Final(shaoutput, &m);
4358 memcpy((unsigned char *)keydata + offset,
4360 min(keylen - offset, sizeof(shaoutput)));
4362 offset += sizeof(shaoutput);
4364 } while(offset < keylen);
4365 memset(shaoutput, 0, sizeof(shaoutput));
4367 ret = krb5_random_to_key(context, type, keydata, keylen, key);
4368 memset(keydata, 0, sizeof(keylen));
4376 static krb5_error_code
4377 krb5_get_keyid(krb5_context context,
4382 unsigned char tmp[16];
4385 MD5_Update (&md5, key->keyvalue.data, key->keyvalue.length);
4386 MD5_Final (tmp, &md5);
4387 *keyid = (tmp[12] << 24) | (tmp[13] << 16) | (tmp[14] << 8) | tmp[15];
4392 krb5_crypto_debug(krb5_context context,
4399 krb5_get_keyid(context, key, &keyid);
4400 krb5_enctype_to_string(context, key->keytype, &kt);
4401 krb5_warnx(context, "%s %lu bytes with key-id %#x (%s)",
4402 encryptp ? "encrypting" : "decrypting",
4409 #endif /* CRYPTO_DEBUG */
4417 krb5_context context;
4422 unsigned usage = ENCRYPTION_USAGE(3);
4423 krb5_error_code ret;
4425 ret = krb5_init_context(&context);
4427 errx (1, "krb5_init_context failed: %d", ret);
4429 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4430 key.keyvalue.data = "\xb3\x85\x58\x94\xd9\xdc\x7c\xc8"
4431 "\x25\xe9\x85\xab\x3e\xb5\xfb\x0e"
4432 "\xc8\xdf\xab\x26\x86\x64\x15\x25";
4433 key.keyvalue.length = 24;
4435 krb5_crypto_init(context, &key, 0, &crypto);
4437 d = _new_derived_key(crypto, usage);
4440 krb5_copy_keyblock(context, crypto->key.key, &d->key);
4441 _krb5_put_int(constant, usage, 4);
4442 derive_key(context, crypto->et, d, constant, sizeof(constant));
4446 krb5_context context;
4450 krb5_error_code ret;
4453 char *data = "what do ya want for nothing?";
4455 ret = krb5_init_context(&context);
4457 errx (1, "krb5_init_context failed: %d", ret);
4459 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4460 key.keyvalue.data = "Jefe";
4461 /* "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"
4462 "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"; */
4463 key.keyvalue.length = 4;
4465 d = calloc(1, sizeof(*d));
4468 res.checksum.length = 20;
4469 res.checksum.data = malloc(res.checksum.length);
4470 SP_HMAC_SHA1_checksum(context, d, data, 28, &res);