2 * Copyright (c) 1997 - 2008 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 #define KRB5_DEPRECATED
36 #include "krb5_locl.h"
37 #include <pkinit_asn1.h>
39 #ifndef HEIMDAL_SMALLER
40 #define DES3_OLD_ENCTYPE 1
53 struct krb5_crypto_data {
54 struct encryption_type *et;
57 struct key_usage *key_usage;
60 #define CRYPTO_ETYPE(C) ((C)->et->type)
62 /* bits for `flags' below */
63 #define F_KEYED 1 /* checksum is keyed */
64 #define F_CPROOF 2 /* checksum is collision proof */
65 #define F_DERIVED 4 /* uses derived keys */
66 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */
67 #define F_PSEUDO 16 /* not a real protocol type */
68 #define F_SPECIAL 32 /* backwards */
69 #define F_DISABLED 64 /* enctype/checksum disabled */
74 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
75 krb5_salt, krb5_data, krb5_keyblock*);
79 krb5_keytype type; /* XXX */
84 void (*random_key)(krb5_context, krb5_keyblock*);
85 void (*schedule)(krb5_context, struct key_type *, struct key_data *);
86 struct salt_type *string_to_key;
87 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
88 void (*cleanup)(krb5_context, struct key_data *);
89 const EVP_CIPHER *(*evp)(void);
92 struct checksum_type {
98 krb5_enctype (*checksum)(krb5_context context,
100 const void *buf, size_t len,
103 krb5_error_code (*verify)(krb5_context context,
104 struct key_data *key,
105 const void *buf, size_t len,
110 struct encryption_type {
115 size_t confoundersize;
116 struct key_type *keytype;
117 struct checksum_type *checksum;
118 struct checksum_type *keyed_checksum;
120 krb5_error_code (*encrypt)(krb5_context context,
121 struct key_data *key,
122 void *data, size_t len,
123 krb5_boolean encryptp,
127 krb5_error_code (*prf)(krb5_context,
128 krb5_crypto, const krb5_data *, krb5_data *);
131 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
132 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55)
133 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99)
135 static struct checksum_type *_find_checksum(krb5_cksumtype type);
136 static struct encryption_type *_find_enctype(krb5_enctype type);
137 static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
138 unsigned, struct key_data**);
139 static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
140 static krb5_error_code derive_key(krb5_context context,
141 struct encryption_type *et,
142 struct key_data *key,
143 const void *constant,
145 static krb5_error_code hmac(krb5_context context,
146 struct checksum_type *cm,
150 struct key_data *keyblock,
152 static void free_key_data(krb5_context,
154 struct encryption_type *);
155 static void free_key_schedule(krb5_context,
157 struct encryption_type *);
158 static krb5_error_code usage2arcfour (krb5_context, unsigned *);
159 static void xor (DES_cblock *, const unsigned char *);
161 /************************************************************
163 ************************************************************/
165 struct evp_schedule {
171 static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
173 #ifdef HEIM_WEAK_CRYPTO
175 krb5_DES_random_key(krb5_context context,
178 DES_cblock *k = key->keyvalue.data;
180 krb5_generate_random_block(k, sizeof(DES_cblock));
181 DES_set_odd_parity(k);
182 } while(DES_is_weak_key(k));
186 krb5_DES_schedule_old(krb5_context context,
188 struct key_data *key)
190 DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
193 #ifdef ENABLE_AFS_STRING_TO_KEY
195 /* This defines the Andrew string_to_key function. It accepts a password
196 * string as input and converts it via a one-way encryption algorithm to a DES
197 * encryption key. It is compatible with the original Andrew authentication
198 * service password database.
202 * Short passwords, i.e 8 characters or less.
205 krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
209 char password[8+1]; /* crypt is limited to 8 chars anyway */
212 for(i = 0; i < 8; i++) {
213 char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
215 tolower(((unsigned char*)cell.data)[i]) : 0);
216 password[i] = c ? c : 'X';
220 memcpy(key, crypt(password, "p1") + 2, sizeof(DES_cblock));
222 /* parity is inserted into the LSB so left shift each byte up one
223 bit. This allows ascii characters with a zero MSB to retain as
224 much significance as possible. */
225 for (i = 0; i < sizeof(DES_cblock); i++)
226 ((unsigned char*)key)[i] <<= 1;
227 DES_set_odd_parity (key);
231 * Long passwords, i.e 9 characters or more.
234 krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
238 DES_key_schedule schedule;
244 memcpy(password, pw.data, min(pw.length, sizeof(password)));
245 if(pw.length < sizeof(password)) {
246 int len = min(cell.length, sizeof(password) - pw.length);
249 memcpy(password + pw.length, cell.data, len);
250 for (i = pw.length; i < pw.length + len; ++i)
251 password[i] = tolower((unsigned char)password[i]);
253 passlen = min(sizeof(password), pw.length + cell.length);
254 memcpy(&ivec, "kerberos", 8);
255 memcpy(&temp_key, "kerberos", 8);
256 DES_set_odd_parity (&temp_key);
257 DES_set_key_unchecked (&temp_key, &schedule);
258 DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
260 memcpy(&temp_key, &ivec, 8);
261 DES_set_odd_parity (&temp_key);
262 DES_set_key_unchecked (&temp_key, &schedule);
263 DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
264 memset(&schedule, 0, sizeof(schedule));
265 memset(&temp_key, 0, sizeof(temp_key));
266 memset(&ivec, 0, sizeof(ivec));
267 memset(password, 0, sizeof(password));
269 DES_set_odd_parity (key);
272 static krb5_error_code
273 DES_AFS3_string_to_key(krb5_context context,
274 krb5_enctype enctype,
281 if(password.length > 8)
282 krb5_DES_AFS3_Transarc_string_to_key(password, salt.saltvalue, &tmp);
284 krb5_DES_AFS3_CMU_string_to_key(password, salt.saltvalue, &tmp);
285 key->keytype = enctype;
286 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
287 memset(&key, 0, sizeof(key));
290 #endif /* ENABLE_AFS_STRING_TO_KEY */
293 DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
295 DES_key_schedule schedule;
300 unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
301 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
304 p = (unsigned char*)key;
305 for (i = 0; i < length; i++) {
306 unsigned char tmp = data[i];
310 *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
314 DES_set_odd_parity(key);
315 if(DES_is_weak_key(key))
317 DES_set_key_unchecked(key, &schedule);
318 DES_cbc_cksum((void*)data, key, length, &schedule, key);
319 memset(&schedule, 0, sizeof(schedule));
320 DES_set_odd_parity(key);
321 if(DES_is_weak_key(key))
325 static krb5_error_code
326 krb5_DES_string_to_key(krb5_context context,
327 krb5_enctype enctype,
337 #ifdef ENABLE_AFS_STRING_TO_KEY
338 if (opaque.length == 1) {
340 _krb5_get_int(opaque.data, &v, 1);
342 return DES_AFS3_string_to_key(context, enctype, password,
347 len = password.length + salt.saltvalue.length;
349 if(len > 0 && s == NULL) {
350 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
353 memcpy(s, password.data, password.length);
354 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
355 DES_string_to_key_int(s, len, &tmp);
356 key->keytype = enctype;
357 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
358 memset(&tmp, 0, sizeof(tmp));
365 krb5_DES_random_to_key(krb5_context context,
370 DES_cblock *k = key->keyvalue.data;
371 memcpy(k, data, key->keyvalue.length);
372 DES_set_odd_parity(k);
373 if(DES_is_weak_key(k))
374 xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
383 DES3_random_key(krb5_context context,
386 DES_cblock *k = key->keyvalue.data;
388 krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
389 DES_set_odd_parity(&k[0]);
390 DES_set_odd_parity(&k[1]);
391 DES_set_odd_parity(&k[2]);
392 } while(DES_is_weak_key(&k[0]) ||
393 DES_is_weak_key(&k[1]) ||
394 DES_is_weak_key(&k[2]));
398 * A = A xor B. A & B are 8 bytes.
402 xor (DES_cblock *key, const unsigned char *b)
404 unsigned char *a = (unsigned char*)key;
415 #ifdef DES3_OLD_ENCTYPE
416 static krb5_error_code
417 DES3_string_to_key(krb5_context context,
418 krb5_enctype enctype,
426 unsigned char tmp[24];
430 len = password.length + salt.saltvalue.length;
432 if(len != 0 && str == NULL) {
433 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
436 memcpy(str, password.data, password.length);
437 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
440 DES_key_schedule s[3];
443 ret = _krb5_n_fold(str, len, tmp, 24);
447 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
451 for(i = 0; i < 3; i++){
452 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
453 DES_set_odd_parity(keys + i);
454 if(DES_is_weak_key(keys + i))
455 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
456 DES_set_key_unchecked(keys + i, &s[i]);
458 memset(&ivec, 0, sizeof(ivec));
459 DES_ede3_cbc_encrypt(tmp,
461 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
462 memset(s, 0, sizeof(s));
463 memset(&ivec, 0, sizeof(ivec));
464 for(i = 0; i < 3; i++){
465 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
466 DES_set_odd_parity(keys + i);
467 if(DES_is_weak_key(keys + i))
468 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
470 memset(tmp, 0, sizeof(tmp));
472 key->keytype = enctype;
473 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
474 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_message(context, ENOMEM, N_("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");
548 static krb5_error_code
549 ARCFOUR_string_to_key(krb5_context context,
550 krb5_enctype enctype,
561 m = EVP_MD_CTX_create();
564 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
568 EVP_DigestInit_ex(m, EVP_md4(), NULL);
570 ret = wind_utf8ucs2_length(password.data, &len);
572 krb5_set_error_message (context, ret,
573 N_("Password not an UCS2 string", ""));
577 s = malloc (len * sizeof(s[0]));
578 if (len != 0 && s == NULL) {
579 krb5_set_error_message (context, ENOMEM,
580 N_("malloc: out of memory", ""));
585 ret = wind_utf8ucs2(password.data, s, &len);
587 krb5_set_error_message (context, ret,
588 N_("Password not an UCS2 string", ""));
593 for (i = 0; i < len; i++) {
596 EVP_DigestUpdate (m, &p, 1);
597 p = (s[i] >> 8) & 0xff;
598 EVP_DigestUpdate (m, &p, 1);
601 key->keytype = enctype;
602 ret = krb5_data_alloc (&key->keyvalue, 16);
604 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
607 EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
610 EVP_MD_CTX_destroy(m);
621 int _krb5_AES_string_to_default_iterator = 4096;
623 static krb5_error_code
624 AES_string_to_key(krb5_context context,
625 krb5_enctype enctype,
633 struct encryption_type *et;
636 if (opaque.length == 0)
637 iter = _krb5_AES_string_to_default_iterator;
638 else if (opaque.length == 4) {
640 _krb5_get_int(opaque.data, &v, 4);
641 iter = ((uint32_t)v);
643 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
645 et = _find_enctype(enctype);
647 return KRB5_PROG_KEYTYPE_NOSUPP;
652 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
655 kd.key->keytype = enctype;
656 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
658 krb5_set_error_message (context, ret, N_("malloc: out of memory", ""));
662 ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
663 salt.saltvalue.data, salt.saltvalue.length,
665 et->keytype->size, kd.key->keyvalue.data);
667 free_key_data(context, &kd, et);
668 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
669 "Error calculating s2k");
670 return KRB5_PROG_KEYTYPE_NOSUPP;
673 ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
675 ret = krb5_copy_keyblock_contents(context, kd.key, key);
676 free_key_data(context, &kd, et);
682 evp_schedule(krb5_context context, struct key_type *kt, struct key_data *kd)
684 struct evp_schedule *key = kd->schedule->data;
685 const EVP_CIPHER *c = (*kt->evp)();
687 EVP_CIPHER_CTX_init(&key->ectx);
688 EVP_CIPHER_CTX_init(&key->dctx);
690 EVP_CipherInit_ex(&key->ectx, c, NULL, kd->key->keyvalue.data, NULL, 1);
691 EVP_CipherInit_ex(&key->dctx, c, NULL, kd->key->keyvalue.data, NULL, 0);
695 evp_cleanup(krb5_context context, struct key_data *kd)
697 struct evp_schedule *key = kd->schedule->data;
698 EVP_CIPHER_CTX_cleanup(&key->ectx);
699 EVP_CIPHER_CTX_cleanup(&key->dctx);
706 #ifdef HEIM_WEAK_CRYPTO
707 static struct salt_type des_salt[] = {
711 krb5_DES_string_to_key
713 #ifdef ENABLE_AFS_STRING_TO_KEY
717 DES_AFS3_string_to_key
724 #ifdef DES3_OLD_ENCTYPE
725 static struct salt_type des3_salt[] = {
735 static struct salt_type des3_salt_derived[] = {
739 DES3_string_to_key_derived
744 static struct salt_type AES_salt[] = {
753 static struct salt_type arcfour_salt[] = {
757 ARCFOUR_string_to_key
766 static struct key_type keytype_null = {
777 #ifdef HEIM_WEAK_CRYPTO
778 static struct key_type keytype_des_old = {
783 sizeof(DES_key_schedule),
785 krb5_DES_schedule_old,
787 krb5_DES_random_to_key
790 static struct key_type keytype_des = {
795 sizeof(struct evp_schedule),
799 krb5_DES_random_to_key,
803 #endif /* HEIM_WEAK_CRYPTO */
805 #ifdef DES3_OLD_ENCTYPE
806 static struct key_type keytype_des3 = {
811 sizeof(struct evp_schedule),
821 static struct key_type keytype_des3_derived = {
826 sizeof(struct evp_schedule),
835 static struct key_type keytype_aes128 = {
840 sizeof(struct evp_schedule),
849 static struct key_type keytype_aes256 = {
854 sizeof(struct evp_schedule),
863 static struct key_type keytype_arcfour = {
868 sizeof(struct evp_schedule),
877 krb5_error_code KRB5_LIB_FUNCTION
878 krb5_salttype_to_string (krb5_context context,
883 struct encryption_type *e;
884 struct salt_type *st;
886 e = _find_enctype (etype);
888 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
889 "encryption type %d not supported",
891 return KRB5_PROG_ETYPE_NOSUPP;
893 for (st = e->keytype->string_to_key; st && st->type; st++) {
894 if (st->type == stype) {
895 *string = strdup (st->name);
896 if (*string == NULL) {
897 krb5_set_error_message (context, ENOMEM,
898 N_("malloc: out of memory", ""));
904 krb5_set_error_message (context, HEIM_ERR_SALTTYPE_NOSUPP,
905 "salttype %d not supported", stype);
906 return HEIM_ERR_SALTTYPE_NOSUPP;
909 krb5_error_code KRB5_LIB_FUNCTION
910 krb5_string_to_salttype (krb5_context context,
913 krb5_salttype *salttype)
915 struct encryption_type *e;
916 struct salt_type *st;
918 e = _find_enctype (etype);
920 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
921 N_("encryption type %d not supported", ""),
923 return KRB5_PROG_ETYPE_NOSUPP;
925 for (st = e->keytype->string_to_key; st && st->type; st++) {
926 if (strcasecmp (st->name, string) == 0) {
927 *salttype = st->type;
931 krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
932 N_("salttype %s not supported", ""), string);
933 return HEIM_ERR_SALTTYPE_NOSUPP;
936 krb5_error_code KRB5_LIB_FUNCTION
937 krb5_get_pw_salt(krb5_context context,
938 krb5_const_principal principal,
946 salt->salttype = KRB5_PW_SALT;
947 len = strlen(principal->realm);
948 for (i = 0; i < principal->name.name_string.len; ++i)
949 len += strlen(principal->name.name_string.val[i]);
950 ret = krb5_data_alloc (&salt->saltvalue, len);
953 p = salt->saltvalue.data;
954 memcpy (p, principal->realm, strlen(principal->realm));
955 p += strlen(principal->realm);
956 for (i = 0; i < principal->name.name_string.len; ++i) {
958 principal->name.name_string.val[i],
959 strlen(principal->name.name_string.val[i]));
960 p += strlen(principal->name.name_string.val[i]);
965 krb5_error_code KRB5_LIB_FUNCTION
966 krb5_free_salt(krb5_context context,
969 krb5_data_free(&salt.saltvalue);
973 krb5_error_code KRB5_LIB_FUNCTION
974 krb5_string_to_key_data (krb5_context context,
975 krb5_enctype enctype,
977 krb5_principal principal,
983 ret = krb5_get_pw_salt(context, principal, &salt);
986 ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
987 krb5_free_salt(context, salt);
991 krb5_error_code KRB5_LIB_FUNCTION
992 krb5_string_to_key (krb5_context context,
993 krb5_enctype enctype,
994 const char *password,
995 krb5_principal principal,
999 pw.data = rk_UNCONST(password);
1000 pw.length = strlen(password);
1001 return krb5_string_to_key_data(context, enctype, pw, principal, key);
1004 krb5_error_code KRB5_LIB_FUNCTION
1005 krb5_string_to_key_data_salt (krb5_context context,
1006 krb5_enctype enctype,
1012 krb5_data_zero(&opaque);
1013 return krb5_string_to_key_data_salt_opaque(context, enctype, password,
1018 * Do a string -> key for encryption type `enctype' operation on
1019 * `password' (with salt `salt' and the enctype specific data string
1020 * `opaque'), returning the resulting key in `key'
1023 krb5_error_code KRB5_LIB_FUNCTION
1024 krb5_string_to_key_data_salt_opaque (krb5_context context,
1025 krb5_enctype enctype,
1031 struct encryption_type *et =_find_enctype(enctype);
1032 struct salt_type *st;
1034 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1035 N_("encryption type %d not supported", ""),
1037 return KRB5_PROG_ETYPE_NOSUPP;
1039 for(st = et->keytype->string_to_key; st && st->type; st++)
1040 if(st->type == salt.salttype)
1041 return (*st->string_to_key)(context, enctype, password,
1043 krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
1044 N_("salt type %d not supported", ""),
1046 return HEIM_ERR_SALTTYPE_NOSUPP;
1050 * Do a string -> key for encryption type `enctype' operation on the
1051 * string `password' (with salt `salt'), returning the resulting key
1055 krb5_error_code KRB5_LIB_FUNCTION
1056 krb5_string_to_key_salt (krb5_context context,
1057 krb5_enctype enctype,
1058 const char *password,
1063 pw.data = rk_UNCONST(password);
1064 pw.length = strlen(password);
1065 return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
1068 krb5_error_code KRB5_LIB_FUNCTION
1069 krb5_string_to_key_salt_opaque (krb5_context context,
1070 krb5_enctype enctype,
1071 const char *password,
1077 pw.data = rk_UNCONST(password);
1078 pw.length = strlen(password);
1079 return krb5_string_to_key_data_salt_opaque(context, enctype,
1080 pw, salt, opaque, key);
1083 krb5_error_code KRB5_LIB_FUNCTION
1084 krb5_enctype_keysize(krb5_context context,
1088 struct encryption_type *et = _find_enctype(type);
1090 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1091 N_("encryption type %d not supported", ""),
1093 return KRB5_PROG_ETYPE_NOSUPP;
1095 *keysize = et->keytype->size;
1099 krb5_error_code KRB5_LIB_FUNCTION
1100 krb5_enctype_keybits(krb5_context context,
1104 struct encryption_type *et = _find_enctype(type);
1106 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1107 "encryption type %d not supported",
1109 return KRB5_PROG_ETYPE_NOSUPP;
1111 *keybits = et->keytype->bits;
1115 krb5_error_code KRB5_LIB_FUNCTION
1116 krb5_generate_random_keyblock(krb5_context context,
1120 krb5_error_code ret;
1121 struct encryption_type *et = _find_enctype(type);
1123 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1124 N_("encryption type %d not supported", ""),
1126 return KRB5_PROG_ETYPE_NOSUPP;
1128 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
1131 key->keytype = type;
1132 if(et->keytype->random_key)
1133 (*et->keytype->random_key)(context, key);
1135 krb5_generate_random_block(key->keyvalue.data,
1136 key->keyvalue.length);
1140 static krb5_error_code
1141 _key_schedule(krb5_context context,
1142 struct key_data *key)
1144 krb5_error_code ret;
1145 struct encryption_type *et = _find_enctype(key->key->keytype);
1146 struct key_type *kt;
1149 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
1150 N_("encryption type %d not supported", ""),
1152 return KRB5_PROG_ETYPE_NOSUPP;
1157 if(kt->schedule == NULL)
1159 if (key->schedule != NULL)
1161 ALLOC(key->schedule, 1);
1162 if(key->schedule == NULL) {
1163 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1166 ret = krb5_data_alloc(key->schedule, kt->schedule_size);
1168 free(key->schedule);
1169 key->schedule = NULL;
1172 (*kt->schedule)(context, kt, key);
1176 /************************************************************
1178 ************************************************************/
1180 static krb5_error_code
1181 NONE_checksum(krb5_context context,
1182 struct key_data *key,
1191 #if defined(DES3_OLD_ENCTYPE) || defined(HEIM_WEAK_CRYPTO)
1193 static krb5_error_code
1194 des_checksum(krb5_context context,
1195 const EVP_MD *evp_md,
1196 struct key_data *key,
1201 struct evp_schedule *ctx = key->schedule->data;
1204 unsigned char *p = cksum->checksum.data;
1206 krb5_generate_random_block(p, 8);
1208 m = EVP_MD_CTX_create();
1210 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1214 EVP_DigestInit_ex(m, evp_md, NULL);
1215 EVP_DigestUpdate(m, p, 8);
1216 EVP_DigestUpdate(m, data, len);
1217 EVP_DigestFinal_ex (m, p + 8, NULL);
1218 EVP_MD_CTX_destroy(m);
1219 memset (&ivec, 0, sizeof(ivec));
1220 EVP_CipherInit_ex(&ctx->ectx, NULL, NULL, NULL, (void *)&ivec, -1);
1221 EVP_Cipher(&ctx->ectx, p, p, 24);
1226 static krb5_error_code
1227 des_verify(krb5_context context,
1228 const EVP_MD *evp_md,
1229 struct key_data *key,
1234 struct evp_schedule *ctx = key->schedule->data;
1236 unsigned char tmp[24];
1237 unsigned char res[16];
1239 krb5_error_code ret = 0;
1241 m = EVP_MD_CTX_create();
1243 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1247 memset(&ivec, 0, sizeof(ivec));
1248 EVP_CipherInit_ex(&ctx->dctx, NULL, NULL, NULL, (void *)&ivec, -1);
1249 EVP_Cipher(&ctx->dctx, tmp, C->checksum.data, 24);
1251 EVP_DigestInit_ex(m, evp_md, NULL);
1252 EVP_DigestUpdate(m, tmp, 8); /* confounder */
1253 EVP_DigestUpdate(m, data, len);
1254 EVP_DigestFinal_ex (m, res, NULL);
1255 EVP_MD_CTX_destroy(m);
1256 if(ct_memcmp(res, tmp + 8, sizeof(res)) != 0) {
1257 krb5_clear_error_message (context);
1258 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1260 memset(tmp, 0, sizeof(tmp));
1261 memset(res, 0, sizeof(res));
1267 #ifdef HEIM_WEAK_CRYPTO
1269 static krb5_error_code
1270 CRC32_checksum(krb5_context context,
1271 struct key_data *key,
1278 unsigned char *r = C->checksum.data;
1279 _krb5_crc_init_table ();
1280 crc = _krb5_crc_update (data, len, 0);
1282 r[1] = (crc >> 8) & 0xff;
1283 r[2] = (crc >> 16) & 0xff;
1284 r[3] = (crc >> 24) & 0xff;
1288 static krb5_error_code
1289 RSA_MD4_checksum(krb5_context context,
1290 struct key_data *key,
1296 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md4(), NULL) != 1)
1297 krb5_abortx(context, "md4 checksum failed");
1301 static krb5_error_code
1302 RSA_MD4_DES_checksum(krb5_context context,
1303 struct key_data *key,
1309 return des_checksum(context, EVP_md4(), key, data, len, cksum);
1312 static krb5_error_code
1313 RSA_MD4_DES_verify(krb5_context context,
1314 struct key_data *key,
1320 return des_verify(context, EVP_md5(), key, data, len, C);
1323 static krb5_error_code
1324 RSA_MD5_DES_checksum(krb5_context context,
1325 struct key_data *key,
1331 return des_checksum(context, EVP_md5(), key, data, len, C);
1334 static krb5_error_code
1335 RSA_MD5_DES_verify(krb5_context context,
1336 struct key_data *key,
1342 return des_verify(context, EVP_md5(), key, data, len, C);
1345 #endif /* HEIM_WEAK_CRYPTO */
1347 #ifdef DES3_OLD_ENCTYPE
1348 static krb5_error_code
1349 RSA_MD5_DES3_checksum(krb5_context context,
1350 struct key_data *key,
1356 return des_checksum(context, EVP_md5(), key, data, len, C);
1359 static krb5_error_code
1360 RSA_MD5_DES3_verify(krb5_context context,
1361 struct key_data *key,
1367 return des_verify(context, EVP_md5(), key, data, len, C);
1371 static krb5_error_code
1372 SHA1_checksum(krb5_context context,
1373 struct key_data *key,
1379 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_sha1(), NULL) != 1)
1380 krb5_abortx(context, "sha1 checksum failed");
1384 /* HMAC according to RFC2104 */
1385 static krb5_error_code
1386 hmac(krb5_context context,
1387 struct checksum_type *cm,
1391 struct key_data *keyblock,
1394 unsigned char *ipad, *opad;
1399 ipad = malloc(cm->blocksize + len);
1402 opad = malloc(cm->blocksize + cm->checksumsize);
1407 memset(ipad, 0x36, cm->blocksize);
1408 memset(opad, 0x5c, cm->blocksize);
1410 if(keyblock->key->keyvalue.length > cm->blocksize){
1411 (*cm->checksum)(context,
1413 keyblock->key->keyvalue.data,
1414 keyblock->key->keyvalue.length,
1417 key = result->checksum.data;
1418 key_len = result->checksum.length;
1420 key = keyblock->key->keyvalue.data;
1421 key_len = keyblock->key->keyvalue.length;
1423 for(i = 0; i < key_len; i++){
1427 memcpy(ipad + cm->blocksize, data, len);
1428 (*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
1430 memcpy(opad + cm->blocksize, result->checksum.data,
1431 result->checksum.length);
1432 (*cm->checksum)(context, keyblock, opad,
1433 cm->blocksize + cm->checksumsize, usage, result);
1434 memset(ipad, 0, cm->blocksize + len);
1436 memset(opad, 0, cm->blocksize + cm->checksumsize);
1442 krb5_error_code KRB5_LIB_FUNCTION
1443 krb5_hmac(krb5_context context,
1444 krb5_cksumtype cktype,
1451 struct checksum_type *c = _find_checksum(cktype);
1453 krb5_error_code ret;
1456 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1457 N_("checksum type %d not supported", ""),
1459 return KRB5_PROG_SUMTYPE_NOSUPP;
1465 ret = hmac(context, c, data, len, usage, &kd, result);
1468 krb5_free_data(context, kd.schedule);
1473 static krb5_error_code
1474 SP_HMAC_SHA1_checksum(krb5_context context,
1475 struct key_data *key,
1481 struct checksum_type *c = _find_checksum(CKSUMTYPE_SHA1);
1484 krb5_error_code ret;
1486 res.checksum.data = sha1_data;
1487 res.checksum.length = sizeof(sha1_data);
1489 ret = hmac(context, c, data, len, usage, key, &res);
1491 krb5_abortx(context, "hmac failed");
1492 memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
1497 * checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
1500 static krb5_error_code
1501 HMAC_MD5_checksum(krb5_context context,
1502 struct key_data *key,
1509 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1510 const char signature[] = "signaturekey";
1512 struct key_data ksign;
1515 unsigned char tmp[16];
1516 unsigned char ksign_c_data[16];
1517 krb5_error_code ret;
1519 m = EVP_MD_CTX_create();
1521 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1524 ksign_c.checksum.length = sizeof(ksign_c_data);
1525 ksign_c.checksum.data = ksign_c_data;
1526 ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
1528 EVP_MD_CTX_destroy(m);
1532 kb.keyvalue = ksign_c.checksum;
1533 EVP_DigestInit_ex(m, EVP_md5(), NULL);
1534 t[0] = (usage >> 0) & 0xFF;
1535 t[1] = (usage >> 8) & 0xFF;
1536 t[2] = (usage >> 16) & 0xFF;
1537 t[3] = (usage >> 24) & 0xFF;
1538 EVP_DigestUpdate(m, t, 4);
1539 EVP_DigestUpdate(m, data, len);
1540 EVP_DigestFinal_ex (m, tmp, NULL);
1541 EVP_MD_CTX_destroy(m);
1543 ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
1549 static struct checksum_type checksum_none = {
1558 #ifdef HEIM_WEAK_CRYPTO
1559 static struct checksum_type checksum_crc32 = {
1568 static struct checksum_type checksum_rsa_md4 = {
1577 static struct checksum_type checksum_rsa_md4_des = {
1578 CKSUMTYPE_RSA_MD4_DES,
1582 F_KEYED | F_CPROOF | F_VARIANT,
1583 RSA_MD4_DES_checksum,
1586 static struct checksum_type checksum_rsa_md5_des = {
1587 CKSUMTYPE_RSA_MD5_DES,
1591 F_KEYED | F_CPROOF | F_VARIANT,
1592 RSA_MD5_DES_checksum,
1595 #endif /* HEIM_WEAK_CRYPTO */
1597 static krb5_error_code
1598 RSA_MD5_checksum(krb5_context context,
1599 struct key_data *key,
1605 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md5(), NULL) != 1)
1606 krb5_abortx(context, "md5 checksum failed");
1610 static struct checksum_type checksum_rsa_md5 = {
1620 #ifdef DES3_OLD_ENCTYPE
1621 static struct checksum_type checksum_rsa_md5_des3 = {
1622 CKSUMTYPE_RSA_MD5_DES3,
1626 F_KEYED | F_CPROOF | F_VARIANT,
1627 RSA_MD5_DES3_checksum,
1631 static struct checksum_type checksum_sha1 = {
1640 static struct checksum_type checksum_hmac_sha1_des3 = {
1641 CKSUMTYPE_HMAC_SHA1_DES3,
1645 F_KEYED | F_CPROOF | F_DERIVED,
1646 SP_HMAC_SHA1_checksum,
1650 static struct checksum_type checksum_hmac_sha1_aes128 = {
1651 CKSUMTYPE_HMAC_SHA1_96_AES_128,
1652 "hmac-sha1-96-aes128",
1655 F_KEYED | F_CPROOF | F_DERIVED,
1656 SP_HMAC_SHA1_checksum,
1660 static struct checksum_type checksum_hmac_sha1_aes256 = {
1661 CKSUMTYPE_HMAC_SHA1_96_AES_256,
1662 "hmac-sha1-96-aes256",
1665 F_KEYED | F_CPROOF | F_DERIVED,
1666 SP_HMAC_SHA1_checksum,
1670 static struct checksum_type checksum_hmac_md5 = {
1680 static struct checksum_type *checksum_types[] = {
1682 #ifdef HEIM_WEAK_CRYPTO
1685 &checksum_rsa_md4_des,
1686 &checksum_rsa_md5_des,
1688 #ifdef DES3_OLD_ENCTYPE
1689 &checksum_rsa_md5_des3,
1693 &checksum_hmac_sha1_des3,
1694 &checksum_hmac_sha1_aes128,
1695 &checksum_hmac_sha1_aes256,
1699 static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
1701 static struct checksum_type *
1702 _find_checksum(krb5_cksumtype type)
1705 for(i = 0; i < num_checksums; i++)
1706 if(checksum_types[i]->type == type)
1707 return checksum_types[i];
1711 static krb5_error_code
1712 get_checksum_key(krb5_context context,
1714 unsigned usage, /* not krb5_key_usage */
1715 struct checksum_type *ct,
1716 struct key_data **key)
1718 krb5_error_code ret = 0;
1720 if(ct->flags & F_DERIVED)
1721 ret = _get_derived_key(context, crypto, usage, key);
1722 else if(ct->flags & F_VARIANT) {
1725 *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
1727 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
1730 ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
1733 for(i = 0; i < (*key)->key->keyvalue.length; i++)
1734 ((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
1736 *key = &crypto->key;
1739 ret = _key_schedule(context, *key);
1743 static krb5_error_code
1744 create_checksum (krb5_context context,
1745 struct checksum_type *ct,
1752 krb5_error_code ret;
1753 struct key_data *dkey;
1756 if (ct->flags & F_DISABLED) {
1757 krb5_clear_error_message (context);
1758 return KRB5_PROG_SUMTYPE_NOSUPP;
1760 keyed_checksum = (ct->flags & F_KEYED) != 0;
1761 if(keyed_checksum && crypto == NULL) {
1762 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1763 N_("Checksum type %s is keyed but no "
1764 "crypto context (key) was passed in", ""),
1766 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1768 if(keyed_checksum) {
1769 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1774 result->cksumtype = ct->type;
1775 ret = krb5_data_alloc(&result->checksum, ct->checksumsize);
1778 return (*ct->checksum)(context, dkey, data, len, usage, result);
1782 arcfour_checksum_p(struct checksum_type *ct, krb5_crypto crypto)
1784 return (ct->type == CKSUMTYPE_HMAC_MD5) &&
1785 (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
1788 krb5_error_code KRB5_LIB_FUNCTION
1789 krb5_create_checksum(krb5_context context,
1791 krb5_key_usage usage,
1797 struct checksum_type *ct = NULL;
1800 /* type 0 -> pick from crypto */
1802 ct = _find_checksum(type);
1803 } else if (crypto) {
1804 ct = crypto->et->keyed_checksum;
1806 ct = crypto->et->checksum;
1810 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1811 N_("checksum type %d not supported", ""),
1813 return KRB5_PROG_SUMTYPE_NOSUPP;
1816 if (arcfour_checksum_p(ct, crypto)) {
1818 usage2arcfour(context, &keyusage);
1820 keyusage = CHECKSUM_USAGE(usage);
1822 return create_checksum(context, ct, crypto, keyusage,
1826 static krb5_error_code
1827 verify_checksum(krb5_context context,
1829 unsigned usage, /* not krb5_key_usage */
1834 krb5_error_code ret;
1835 struct key_data *dkey;
1838 struct checksum_type *ct;
1840 ct = _find_checksum(cksum->cksumtype);
1841 if (ct == NULL || (ct->flags & F_DISABLED)) {
1842 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1843 N_("checksum type %d not supported", ""),
1845 return KRB5_PROG_SUMTYPE_NOSUPP;
1847 if(ct->checksumsize != cksum->checksum.length) {
1848 krb5_clear_error_message (context);
1849 return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
1851 keyed_checksum = (ct->flags & F_KEYED) != 0;
1852 if(keyed_checksum) {
1853 struct checksum_type *kct;
1854 if (crypto == NULL) {
1855 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1856 N_("Checksum type %s is keyed but no "
1857 "crypto context (key) was passed in", ""),
1859 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1861 kct = crypto->et->keyed_checksum;
1862 if (kct != NULL && kct->type != ct->type) {
1863 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1864 N_("Checksum type %s is keyed, but "
1865 "the key type %s passed didnt have that checksum "
1866 "type as the keyed type", ""),
1867 ct->name, crypto->et->name);
1868 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1871 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1877 return (*ct->verify)(context, dkey, data, len, usage, cksum);
1879 ret = krb5_data_alloc (&c.checksum, ct->checksumsize);
1883 ret = (*ct->checksum)(context, dkey, data, len, usage, &c);
1885 krb5_data_free(&c.checksum);
1889 if(c.checksum.length != cksum->checksum.length ||
1890 ct_memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
1891 krb5_clear_error_message (context);
1892 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1896 krb5_data_free (&c.checksum);
1900 krb5_error_code KRB5_LIB_FUNCTION
1901 krb5_verify_checksum(krb5_context context,
1903 krb5_key_usage usage,
1908 struct checksum_type *ct;
1911 ct = _find_checksum(cksum->cksumtype);
1913 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1914 N_("checksum type %d not supported", ""),
1916 return KRB5_PROG_SUMTYPE_NOSUPP;
1919 if (arcfour_checksum_p(ct, crypto)) {
1921 usage2arcfour(context, &keyusage);
1923 keyusage = CHECKSUM_USAGE(usage);
1925 return verify_checksum(context, crypto, keyusage,
1929 krb5_error_code KRB5_LIB_FUNCTION
1930 krb5_crypto_get_checksum_type(krb5_context context,
1932 krb5_cksumtype *type)
1934 struct checksum_type *ct = NULL;
1936 if (crypto != NULL) {
1937 ct = crypto->et->keyed_checksum;
1939 ct = crypto->et->checksum;
1943 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1944 N_("checksum type not found", ""));
1945 return KRB5_PROG_SUMTYPE_NOSUPP;
1954 krb5_error_code KRB5_LIB_FUNCTION
1955 krb5_checksumsize(krb5_context context,
1956 krb5_cksumtype type,
1959 struct checksum_type *ct = _find_checksum(type);
1961 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1962 N_("checksum type %d not supported", ""),
1964 return KRB5_PROG_SUMTYPE_NOSUPP;
1966 *size = ct->checksumsize;
1970 krb5_boolean KRB5_LIB_FUNCTION
1971 krb5_checksum_is_keyed(krb5_context context,
1972 krb5_cksumtype type)
1974 struct checksum_type *ct = _find_checksum(type);
1977 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1978 N_("checksum type %d not supported", ""),
1980 return KRB5_PROG_SUMTYPE_NOSUPP;
1982 return ct->flags & F_KEYED;
1985 krb5_boolean KRB5_LIB_FUNCTION
1986 krb5_checksum_is_collision_proof(krb5_context context,
1987 krb5_cksumtype type)
1989 struct checksum_type *ct = _find_checksum(type);
1992 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1993 N_("checksum type %d not supported", ""),
1995 return KRB5_PROG_SUMTYPE_NOSUPP;
1997 return ct->flags & F_CPROOF;
2000 krb5_error_code KRB5_LIB_FUNCTION
2001 krb5_checksum_disable(krb5_context context,
2002 krb5_cksumtype type)
2004 struct checksum_type *ct = _find_checksum(type);
2007 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2008 N_("checksum type %d not supported", ""),
2010 return KRB5_PROG_SUMTYPE_NOSUPP;
2012 ct->flags |= F_DISABLED;
2016 /************************************************************
2018 ************************************************************/
2020 static krb5_error_code
2021 NULL_encrypt(krb5_context context,
2022 struct key_data *key,
2025 krb5_boolean encryptp,
2032 static krb5_error_code
2033 evp_encrypt(krb5_context context,
2034 struct key_data *key,
2037 krb5_boolean encryptp,
2041 struct evp_schedule *ctx = key->schedule->data;
2043 c = encryptp ? &ctx->ectx : &ctx->dctx;
2046 size_t len = EVP_CIPHER_CTX_iv_length(c);
2047 void *loiv = malloc(len);
2049 krb5_clear_error_message(context);
2052 memset(loiv, 0, len);
2053 EVP_CipherInit_ex(c, NULL, NULL, NULL, loiv, -1);
2056 EVP_CipherInit_ex(c, NULL, NULL, NULL, ivec, -1);
2057 EVP_Cipher(c, data, data, len);
2061 static const char zero_ivec[EVP_MAX_BLOCK_LENGTH] = { 0 };
2063 static krb5_error_code
2064 evp_encrypt_cts(krb5_context context,
2065 struct key_data *key,
2068 krb5_boolean encryptp,
2072 size_t i, blocksize;
2073 struct evp_schedule *ctx = key->schedule->data;
2074 char tmp[EVP_MAX_BLOCK_LENGTH], ivec2[EVP_MAX_BLOCK_LENGTH];
2078 c = encryptp ? &ctx->ectx : &ctx->dctx;
2080 blocksize = EVP_CIPHER_CTX_block_size(c);
2082 if (len < blocksize) {
2083 krb5_set_error_message(context, EINVAL,
2084 "message block too short");
2086 } else if (len == blocksize) {
2087 EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
2088 EVP_Cipher(c, data, data, len);
2093 EVP_CipherInit_ex(c, NULL, NULL, NULL, ivec, -1);
2095 EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
2100 i = ((len - 1) / blocksize) * blocksize;
2101 EVP_Cipher(c, p, p, i);
2104 memcpy(ivec2, p, blocksize);
2106 for (i = 0; i < len; i++)
2107 tmp[i] = p[i + blocksize] ^ ivec2[i];
2108 for (; i < blocksize; i++)
2109 tmp[i] = 0 ^ ivec2[i];
2111 EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
2112 EVP_Cipher(c, p, tmp, blocksize);
2114 memcpy(p + blocksize, ivec2, len);
2116 memcpy(ivec, p, blocksize);
2118 char tmp2[EVP_MAX_BLOCK_LENGTH], tmp3[EVP_MAX_BLOCK_LENGTH];
2121 if (len > blocksize * 2) {
2122 /* remove last two blocks and round up, decrypt this with cbc, then do cts dance */
2123 i = ((((len - blocksize * 2) + blocksize - 1) / blocksize) * blocksize);
2124 memcpy(ivec2, p + i - blocksize, blocksize);
2125 EVP_Cipher(c, p, p, i);
2127 len -= i + blocksize;
2130 memcpy(ivec2, ivec, blocksize);
2132 memcpy(ivec2, zero_ivec, blocksize);
2136 memcpy(tmp, p, blocksize);
2137 EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
2138 EVP_Cipher(c, tmp2, p, blocksize);
2140 memcpy(tmp3, p + blocksize, len);
2141 memcpy(tmp3 + len, tmp2 + len, blocksize - len); /* xor 0 */
2143 for (i = 0; i < len; i++)
2144 p[i + blocksize] = tmp2[i] ^ tmp3[i];
2146 EVP_CipherInit_ex(c, NULL, NULL, NULL, zero_ivec, -1);
2147 EVP_Cipher(c, p, tmp3, blocksize);
2149 for (i = 0; i < blocksize; i++)
2152 memcpy(ivec, tmp, blocksize);
2157 #ifdef HEIM_WEAK_CRYPTO
2158 static krb5_error_code
2159 evp_des_encrypt_null_ivec(krb5_context context,
2160 struct key_data *key,
2163 krb5_boolean encryptp,
2167 struct evp_schedule *ctx = key->schedule->data;
2170 memset(&ivec, 0, sizeof(ivec));
2171 c = encryptp ? &ctx->ectx : &ctx->dctx;
2172 EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
2173 EVP_Cipher(c, data, data, len);
2177 static krb5_error_code
2178 evp_des_encrypt_key_ivec(krb5_context context,
2179 struct key_data *key,
2182 krb5_boolean encryptp,
2186 struct evp_schedule *ctx = key->schedule->data;
2189 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2190 c = encryptp ? &ctx->ectx : &ctx->dctx;
2191 EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
2192 EVP_Cipher(c, data, data, len);
2196 static krb5_error_code
2197 DES_CFB64_encrypt_null_ivec(krb5_context context,
2198 struct key_data *key,
2201 krb5_boolean encryptp,
2207 DES_key_schedule *s = key->schedule->data;
2208 memset(&ivec, 0, sizeof(ivec));
2210 DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
2214 static krb5_error_code
2215 DES_PCBC_encrypt_key_ivec(krb5_context context,
2216 struct key_data *key,
2219 krb5_boolean encryptp,
2224 DES_key_schedule *s = key->schedule->data;
2225 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2227 DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
2233 * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
2235 * warning: not for small children
2238 static krb5_error_code
2239 ARCFOUR_subencrypt(krb5_context context,
2240 struct key_data *key,
2247 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2248 Checksum k1_c, k2_c, k3_c, cksum;
2252 unsigned char *cdata = data;
2253 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2254 krb5_error_code ret;
2256 t[0] = (usage >> 0) & 0xFF;
2257 t[1] = (usage >> 8) & 0xFF;
2258 t[2] = (usage >> 16) & 0xFF;
2259 t[3] = (usage >> 24) & 0xFF;
2261 k1_c.checksum.length = sizeof(k1_c_data);
2262 k1_c.checksum.data = k1_c_data;
2264 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2266 krb5_abortx(context, "hmac failed");
2268 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2270 k2_c.checksum.length = sizeof(k2_c_data);
2271 k2_c.checksum.data = k2_c_data;
2274 kb.keyvalue = k2_c.checksum;
2276 cksum.checksum.length = 16;
2277 cksum.checksum.data = data;
2279 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2281 krb5_abortx(context, "hmac failed");
2284 kb.keyvalue = k1_c.checksum;
2286 k3_c.checksum.length = sizeof(k3_c_data);
2287 k3_c.checksum.data = k3_c_data;
2289 ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
2291 krb5_abortx(context, "hmac failed");
2293 EVP_CIPHER_CTX_init(&ctx);
2295 EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 1);
2296 EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16);
2297 EVP_CIPHER_CTX_cleanup(&ctx);
2299 memset (k1_c_data, 0, sizeof(k1_c_data));
2300 memset (k2_c_data, 0, sizeof(k2_c_data));
2301 memset (k3_c_data, 0, sizeof(k3_c_data));
2305 static krb5_error_code
2306 ARCFOUR_subdecrypt(krb5_context context,
2307 struct key_data *key,
2314 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2315 Checksum k1_c, k2_c, k3_c, cksum;
2319 unsigned char *cdata = data;
2320 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2321 unsigned char cksum_data[16];
2322 krb5_error_code ret;
2324 t[0] = (usage >> 0) & 0xFF;
2325 t[1] = (usage >> 8) & 0xFF;
2326 t[2] = (usage >> 16) & 0xFF;
2327 t[3] = (usage >> 24) & 0xFF;
2329 k1_c.checksum.length = sizeof(k1_c_data);
2330 k1_c.checksum.data = k1_c_data;
2332 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2334 krb5_abortx(context, "hmac failed");
2336 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2338 k2_c.checksum.length = sizeof(k2_c_data);
2339 k2_c.checksum.data = k2_c_data;
2342 kb.keyvalue = k1_c.checksum;
2344 k3_c.checksum.length = sizeof(k3_c_data);
2345 k3_c.checksum.data = k3_c_data;
2347 ret = hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
2349 krb5_abortx(context, "hmac failed");
2351 EVP_CIPHER_CTX_init(&ctx);
2352 EVP_CipherInit_ex(&ctx, EVP_rc4(), NULL, k3_c.checksum.data, NULL, 0);
2353 EVP_Cipher(&ctx, cdata + 16, cdata + 16, len - 16);
2354 EVP_CIPHER_CTX_cleanup(&ctx);
2357 kb.keyvalue = k2_c.checksum;
2359 cksum.checksum.length = 16;
2360 cksum.checksum.data = cksum_data;
2362 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2364 krb5_abortx(context, "hmac failed");
2366 memset (k1_c_data, 0, sizeof(k1_c_data));
2367 memset (k2_c_data, 0, sizeof(k2_c_data));
2368 memset (k3_c_data, 0, sizeof(k3_c_data));
2370 if (ct_memcmp (cksum.checksum.data, data, 16) != 0) {
2371 krb5_clear_error_message (context);
2372 return KRB5KRB_AP_ERR_BAD_INTEGRITY;
2379 * convert the usage numbers used in
2380 * draft-ietf-cat-kerb-key-derivation-00.txt to the ones in
2381 * draft-brezak-win2k-krb-rc4-hmac-04.txt
2384 static krb5_error_code
2385 usage2arcfour (krb5_context context, unsigned *usage)
2388 case KRB5_KU_AS_REP_ENC_PART : /* 3 */
2389 case KRB5_KU_TGS_REP_ENC_PART_SUB_KEY : /* 9 */
2392 case KRB5_KU_USAGE_SEAL : /* 22 */
2395 case KRB5_KU_USAGE_SIGN : /* 23 */
2398 case KRB5_KU_USAGE_SEQ: /* 24 */
2406 static krb5_error_code
2407 ARCFOUR_encrypt(krb5_context context,
2408 struct key_data *key,
2411 krb5_boolean encryptp,
2415 krb5_error_code ret;
2416 unsigned keyusage = usage;
2418 if((ret = usage2arcfour (context, &keyusage)) != 0)
2422 return ARCFOUR_subencrypt (context, key, data, len, keyusage, ivec);
2424 return ARCFOUR_subdecrypt (context, key, data, len, keyusage, ivec);
2432 static krb5_error_code
2433 AES_PRF(krb5_context context,
2435 const krb5_data *in,
2438 struct checksum_type *ct = crypto->et->checksum;
2439 krb5_error_code ret;
2441 krb5_keyblock *derived;
2443 result.cksumtype = ct->type;
2444 ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
2446 krb5_set_error_message(context, ret, N_("malloc: out memory", ""));
2450 ret = (*ct->checksum)(context, NULL, in->data, in->length, 0, &result);
2452 krb5_data_free(&result.checksum);
2456 if (result.checksum.length < crypto->et->blocksize)
2457 krb5_abortx(context, "internal prf error");
2460 ret = krb5_derive_key(context, crypto->key.key,
2461 crypto->et->type, "prf", 3, &derived);
2463 krb5_abortx(context, "krb5_derive_key");
2465 ret = krb5_data_alloc(out, crypto->et->blocksize);
2467 krb5_abortx(context, "malloc failed");
2470 const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
2473 EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
2474 EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
2475 EVP_Cipher(&ctx, out->data, result.checksum.data,
2476 crypto->et->blocksize);
2477 EVP_CIPHER_CTX_cleanup(&ctx);
2480 krb5_data_free(&result.checksum);
2481 krb5_free_keyblock(context, derived);
2487 * these should currently be in reverse preference order.
2488 * (only relevant for !F_PSEUDO) */
2490 static struct encryption_type enctype_null = {
2504 static struct encryption_type enctype_arcfour_hmac_md5 = {
2505 ETYPE_ARCFOUR_HMAC_MD5,
2518 #ifdef DES3_OLD_ENCTYPE
2519 static struct encryption_type enctype_des3_cbc_md5 = {
2527 &checksum_rsa_md5_des3,
2534 static struct encryption_type enctype_des3_cbc_sha1 = {
2535 ETYPE_DES3_CBC_SHA1,
2540 &keytype_des3_derived,
2542 &checksum_hmac_sha1_des3,
2548 #ifdef DES3_OLD_ENCTYPE
2549 static struct encryption_type enctype_old_des3_cbc_sha1 = {
2550 ETYPE_OLD_DES3_CBC_SHA1,
2551 "old-des3-cbc-sha1",
2557 &checksum_hmac_sha1_des3,
2564 static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
2565 ETYPE_AES128_CTS_HMAC_SHA1_96,
2566 "aes128-cts-hmac-sha1-96",
2572 &checksum_hmac_sha1_aes128,
2578 static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
2579 ETYPE_AES256_CTS_HMAC_SHA1_96,
2580 "aes256-cts-hmac-sha1-96",
2586 &checksum_hmac_sha1_aes256,
2592 static struct encryption_type enctype_des3_cbc_none = {
2593 ETYPE_DES3_CBC_NONE,
2598 &keytype_des3_derived,
2606 #ifdef HEIM_WEAK_CRYPTO
2607 static struct encryption_type enctype_des_cbc_crc = {
2617 evp_des_encrypt_key_ivec,
2621 static struct encryption_type enctype_des_cbc_md4 = {
2629 &checksum_rsa_md4_des,
2631 evp_des_encrypt_null_ivec,
2635 static struct encryption_type enctype_des_cbc_md5 = {
2643 &checksum_rsa_md5_des,
2645 evp_des_encrypt_null_ivec,
2649 static struct encryption_type enctype_des_cbc_none = {
2658 F_PSEUDO|F_DISABLED,
2659 evp_des_encrypt_null_ivec,
2663 static struct encryption_type enctype_des_cfb64_none = {
2664 ETYPE_DES_CFB64_NONE,
2672 F_PSEUDO|F_DISABLED,
2673 DES_CFB64_encrypt_null_ivec,
2677 static struct encryption_type enctype_des_pcbc_none = {
2678 ETYPE_DES_PCBC_NONE,
2686 F_PSEUDO|F_DISABLED,
2687 DES_PCBC_encrypt_key_ivec,
2691 #endif /* HEIM_WEAK_CRYPTO */
2693 static struct encryption_type *etypes[] = {
2694 &enctype_aes256_cts_hmac_sha1,
2695 &enctype_aes128_cts_hmac_sha1,
2696 &enctype_des3_cbc_sha1,
2697 &enctype_des3_cbc_none, /* used by the gss-api mech */
2698 &enctype_arcfour_hmac_md5,
2699 #ifdef DES3_OLD_ENCTYPE
2700 &enctype_des3_cbc_md5,
2701 &enctype_old_des3_cbc_sha1,
2703 #ifdef HEIM_WEAK_CRYPTO
2704 &enctype_des_cbc_crc,
2705 &enctype_des_cbc_md4,
2706 &enctype_des_cbc_md5,
2707 &enctype_des_cbc_none,
2708 &enctype_des_cfb64_none,
2709 &enctype_des_pcbc_none,
2714 static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
2717 static struct encryption_type *
2718 _find_enctype(krb5_enctype type)
2721 for(i = 0; i < num_etypes; i++)
2722 if(etypes[i]->type == type)
2728 krb5_error_code KRB5_LIB_FUNCTION
2729 krb5_enctype_to_string(krb5_context context,
2733 struct encryption_type *e;
2734 e = _find_enctype(etype);
2736 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2737 N_("encryption type %d not supported", ""),
2740 return KRB5_PROG_ETYPE_NOSUPP;
2742 *string = strdup(e->name);
2743 if(*string == NULL) {
2744 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
2750 krb5_error_code KRB5_LIB_FUNCTION
2751 krb5_string_to_enctype(krb5_context context,
2753 krb5_enctype *etype)
2756 for(i = 0; i < num_etypes; i++)
2757 if(strcasecmp(etypes[i]->name, string) == 0){
2758 *etype = etypes[i]->type;
2761 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2762 N_("encryption type %s not supported", ""),
2764 return KRB5_PROG_ETYPE_NOSUPP;
2767 krb5_error_code KRB5_LIB_FUNCTION
2768 krb5_enctype_to_keytype(krb5_context context,
2770 krb5_keytype *keytype)
2772 struct encryption_type *e = _find_enctype(etype);
2774 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2775 N_("encryption type %d not supported", ""),
2777 return KRB5_PROG_ETYPE_NOSUPP;
2779 *keytype = e->keytype->type; /* XXX */
2783 krb5_error_code KRB5_LIB_FUNCTION
2784 krb5_enctype_valid(krb5_context context,
2787 struct encryption_type *e = _find_enctype(etype);
2789 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2790 N_("encryption type %d not supported", ""),
2792 return KRB5_PROG_ETYPE_NOSUPP;
2794 if (e->flags & F_DISABLED) {
2795 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2796 N_("encryption type %s is disabled", ""),
2798 return KRB5_PROG_ETYPE_NOSUPP;
2804 * Return the coresponding encryption type for a checksum type.
2806 * @param context Kerberos context
2807 * @param ctype The checksum type to get the result enctype for
2808 * @param etype The returned encryption, when the matching etype is
2809 * not found, etype is set to ETYPE_NULL.
2811 * @return Return an error code for an failure or 0 on success.
2812 * @ingroup krb5_crypto
2816 krb5_error_code KRB5_LIB_FUNCTION
2817 krb5_cksumtype_to_enctype(krb5_context context,
2818 krb5_cksumtype ctype,
2819 krb5_enctype *etype)
2823 *etype = ETYPE_NULL;
2825 for(i = 0; i < num_etypes; i++) {
2826 if(etypes[i]->keyed_checksum &&
2827 etypes[i]->keyed_checksum->type == ctype)
2829 *etype = etypes[i]->type;
2834 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2835 N_("checksum type %d not supported", ""),
2837 return KRB5_PROG_SUMTYPE_NOSUPP;
2841 krb5_error_code KRB5_LIB_FUNCTION
2842 krb5_cksumtype_valid(krb5_context context,
2843 krb5_cksumtype ctype)
2845 struct checksum_type *c = _find_checksum(ctype);
2847 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2848 N_("checksum type %d not supported", ""),
2850 return KRB5_PROG_SUMTYPE_NOSUPP;
2852 if (c->flags & F_DISABLED) {
2853 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2854 N_("checksum type %s is disabled", ""),
2856 return KRB5_PROG_SUMTYPE_NOSUPP;
2863 derived_crypto(krb5_context context,
2866 return (crypto->et->flags & F_DERIVED) != 0;
2870 special_crypto(krb5_context context,
2873 return (crypto->et->flags & F_SPECIAL) != 0;
2876 #define CHECKSUMSIZE(C) ((C)->checksumsize)
2877 #define CHECKSUMTYPE(C) ((C)->type)
2879 static krb5_error_code
2880 encrypt_internal_derived(krb5_context context,
2888 size_t sz, block_sz, checksum_sz, total_sz;
2890 unsigned char *p, *q;
2891 krb5_error_code ret;
2892 struct key_data *dkey;
2893 const struct encryption_type *et = crypto->et;
2895 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
2897 sz = et->confoundersize + len;
2898 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
2899 total_sz = block_sz + checksum_sz;
2900 p = calloc(1, total_sz);
2902 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
2907 krb5_generate_random_block(q, et->confoundersize); /* XXX */
2908 q += et->confoundersize;
2909 memcpy(q, data, len);
2911 ret = create_checksum(context,
2914 INTEGRITY_USAGE(usage),
2918 if(ret == 0 && cksum.checksum.length != checksum_sz) {
2919 free_Checksum (&cksum);
2920 krb5_clear_error_message (context);
2921 ret = KRB5_CRYPTO_INTERNAL;
2925 memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
2926 free_Checksum (&cksum);
2927 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
2930 ret = _key_schedule(context, dkey);
2933 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
2937 result->length = total_sz;
2940 memset(p, 0, total_sz);
2946 static krb5_error_code
2947 encrypt_internal(krb5_context context,
2954 size_t sz, block_sz, checksum_sz;
2956 unsigned char *p, *q;
2957 krb5_error_code ret;
2958 const struct encryption_type *et = crypto->et;
2960 checksum_sz = CHECKSUMSIZE(et->checksum);
2962 sz = et->confoundersize + checksum_sz + len;
2963 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
2964 p = calloc(1, block_sz);
2966 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
2971 krb5_generate_random_block(q, et->confoundersize); /* XXX */
2972 q += et->confoundersize;
2973 memset(q, 0, checksum_sz);
2975 memcpy(q, data, len);
2977 ret = create_checksum(context,
2984 if(ret == 0 && cksum.checksum.length != checksum_sz) {
2985 krb5_clear_error_message (context);
2986 free_Checksum(&cksum);
2987 ret = KRB5_CRYPTO_INTERNAL;
2991 memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
2992 free_Checksum(&cksum);
2993 ret = _key_schedule(context, &crypto->key);
2996 ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
2998 memset(p, 0, block_sz);
3003 result->length = block_sz;
3006 memset(p, 0, block_sz);
3011 static krb5_error_code
3012 encrypt_internal_special(krb5_context context,
3020 struct encryption_type *et = crypto->et;
3021 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3022 size_t sz = len + cksum_sz + et->confoundersize;
3024 krb5_error_code ret;
3028 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3032 memset (p, 0, cksum_sz);
3034 krb5_generate_random_block(p, et->confoundersize);
3035 p += et->confoundersize;
3036 memcpy (p, data, len);
3037 ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
3044 result->length = sz;
3048 static krb5_error_code
3049 decrypt_internal_derived(krb5_context context,
3060 krb5_error_code ret;
3061 struct key_data *dkey;
3062 struct encryption_type *et = crypto->et;
3065 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3066 if (len < checksum_sz + et->confoundersize) {
3067 krb5_set_error_message(context, KRB5_BAD_MSIZE,
3068 N_("Encrypted data shorter then "
3069 "checksum + confunder", ""));
3070 return KRB5_BAD_MSIZE;
3073 if (((len - checksum_sz) % et->padsize) != 0) {
3074 krb5_clear_error_message(context);
3075 return KRB5_BAD_MSIZE;
3079 if(len != 0 && p == NULL) {
3080 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3083 memcpy(p, data, len);
3087 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3092 ret = _key_schedule(context, dkey);
3097 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3103 cksum.checksum.data = p + len;
3104 cksum.checksum.length = checksum_sz;
3105 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3107 ret = verify_checksum(context,
3109 INTEGRITY_USAGE(usage),
3117 l = len - et->confoundersize;
3118 memmove(p, p + et->confoundersize, l);
3119 result->data = realloc(p, l);
3120 if(result->data == NULL && l != 0) {
3122 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3129 static krb5_error_code
3130 decrypt_internal(krb5_context context,
3137 krb5_error_code ret;
3140 size_t checksum_sz, l;
3141 struct encryption_type *et = crypto->et;
3143 if ((len % et->padsize) != 0) {
3144 krb5_clear_error_message(context);
3145 return KRB5_BAD_MSIZE;
3148 checksum_sz = CHECKSUMSIZE(et->checksum);
3150 if(len != 0 && p == NULL) {
3151 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3154 memcpy(p, data, len);
3156 ret = _key_schedule(context, &crypto->key);
3161 ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
3166 ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
3171 memset(p + et->confoundersize, 0, checksum_sz);
3172 cksum.cksumtype = CHECKSUMTYPE(et->checksum);
3173 ret = verify_checksum(context, NULL, 0, p, len, &cksum);
3174 free_Checksum(&cksum);
3179 l = len - et->confoundersize - checksum_sz;
3180 memmove(p, p + et->confoundersize + checksum_sz, l);
3181 result->data = realloc(p, l);
3182 if(result->data == NULL && l != 0) {
3184 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3191 static krb5_error_code
3192 decrypt_internal_special(krb5_context context,
3200 struct encryption_type *et = crypto->et;
3201 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3202 size_t sz = len - cksum_sz - et->confoundersize;
3204 krb5_error_code ret;
3206 if ((len % et->padsize) != 0) {
3207 krb5_clear_error_message(context);
3208 return KRB5_BAD_MSIZE;
3213 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3216 memcpy(p, data, len);
3218 ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
3224 memmove (p, p + cksum_sz + et->confoundersize, sz);
3225 result->data = realloc(p, sz);
3226 if(result->data == NULL && sz != 0) {
3228 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
3231 result->length = sz;
3235 static krb5_crypto_iov *
3236 find_iv(krb5_crypto_iov *data, int num_data, int type)
3239 for (i = 0; i < num_data; i++)
3240 if (data[i].flags == type)
3246 * Inline encrypt a kerberos message
3248 * @param context Kerberos context
3249 * @param crypto Kerberos crypto context
3250 * @param usage Key usage for this buffer
3251 * @param data array of buffers to process
3252 * @param num_data length of array
3253 * @param ivec initial cbc/cts vector
3255 * @return Return an error code or 0.
3256 * @ingroup krb5_crypto
3258 * Kerberos encrypted data look like this:
3260 * 1. KRB5_CRYPTO_TYPE_HEADER
3261 * 2. array [1,...] KRB5_CRYPTO_TYPE_DATA and array [0,...]
3262 * KRB5_CRYPTO_TYPE_SIGN_ONLY in any order, however the receiver
3263 * have to aware of the order. KRB5_CRYPTO_TYPE_SIGN_ONLY is
3264 * commonly used headers and trailers.
3265 * 3. KRB5_CRYPTO_TYPE_PADDING, at least on padsize long if padsize > 1
3266 * 4. KRB5_CRYPTO_TYPE_TRAILER
3269 krb5_error_code KRB5_LIB_FUNCTION
3270 krb5_encrypt_iov_ivec(krb5_context context,
3273 krb5_crypto_iov *data,
3277 size_t headersz, trailersz, len;
3279 size_t sz, block_sz, pad_sz;
3281 unsigned char *p, *q;
3282 krb5_error_code ret;
3283 struct key_data *dkey;
3284 const struct encryption_type *et = crypto->et;
3285 krb5_crypto_iov *tiv, *piv, *hiv;
3288 krb5_clear_error_message(context);
3289 return KRB5_CRYPTO_INTERNAL;
3292 if(!derived_crypto(context, crypto)) {
3293 krb5_clear_error_message(context);
3294 return KRB5_CRYPTO_INTERNAL;
3297 headersz = et->confoundersize;
3298 trailersz = CHECKSUMSIZE(et->keyed_checksum);
3300 for (len = 0, i = 0; i < num_data; i++) {
3301 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3303 len += data[i].data.length;
3306 sz = headersz + len;
3307 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3309 pad_sz = block_sz - sz;
3313 hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
3314 if (hiv == NULL || hiv->data.length != headersz)
3315 return KRB5_BAD_MSIZE;
3317 krb5_generate_random_block(hiv->data.data, hiv->data.length);
3320 piv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_PADDING);
3321 /* its ok to have no TYPE_PADDING if there is no padding */
3322 if (piv == NULL && pad_sz != 0)
3323 return KRB5_BAD_MSIZE;
3325 if (piv->data.length < pad_sz)
3326 return KRB5_BAD_MSIZE;
3327 piv->data.length = pad_sz;
3329 memset(piv->data.data, pad_sz, pad_sz);
3335 tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
3336 if (tiv == NULL || tiv->data.length != trailersz)
3337 return KRB5_BAD_MSIZE;
3340 * XXX replace with EVP_Sign? at least make create_checksum an iov
3342 * XXX CTS EVP is broken, can't handle multi buffers :(
3346 for (i = 0; i < num_data; i++) {
3347 if (data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3349 len += data[i].data.length;
3352 p = q = malloc(len);
3354 memcpy(q, hiv->data.data, hiv->data.length);
3355 q += hiv->data.length;
3356 for (i = 0; i < num_data; i++) {
3357 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3358 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3360 memcpy(q, data[i].data.data, data[i].data.length);
3361 q += data[i].data.length;
3364 memset(q, 0, piv->data.length);
3366 ret = create_checksum(context,
3369 INTEGRITY_USAGE(usage),
3374 if(ret == 0 && cksum.checksum.length != trailersz) {
3375 free_Checksum (&cksum);
3376 krb5_clear_error_message (context);
3377 ret = KRB5_CRYPTO_INTERNAL;
3382 /* save cksum at end */
3383 memcpy(tiv->data.data, cksum.checksum.data, cksum.checksum.length);
3384 free_Checksum (&cksum);
3386 /* XXX replace with EVP_Cipher */
3387 p = q = malloc(block_sz);
3391 memcpy(q, hiv->data.data, hiv->data.length);
3392 q += hiv->data.length;
3394 for (i = 0; i < num_data; i++) {
3395 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3397 memcpy(q, data[i].data.data, data[i].data.length);
3398 q += data[i].data.length;
3401 memset(q, 0, piv->data.length);
3404 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3409 ret = _key_schedule(context, dkey);
3415 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
3421 /* now copy data back to buffers */
3424 memcpy(hiv->data.data, q, hiv->data.length);
3425 q += hiv->data.length;
3427 for (i = 0; i < num_data; i++) {
3428 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3430 memcpy(data[i].data.data, q, data[i].data.length);
3431 q += data[i].data.length;
3434 memcpy(piv->data.data, q, pad_sz);
3442 * Inline decrypt a Kerberos message.
3444 * @param context Kerberos context
3445 * @param crypto Kerberos crypto context
3446 * @param usage Key usage for this buffer
3447 * @param data array of buffers to process
3448 * @param num_data length of array
3449 * @param ivec initial cbc/cts vector
3451 * @return Return an error code or 0.
3452 * @ingroup krb5_crypto
3454 * 1. KRB5_CRYPTO_TYPE_HEADER
3455 * 2. one KRB5_CRYPTO_TYPE_DATA and array [0,...] of KRB5_CRYPTO_TYPE_SIGN_ONLY in
3456 * any order, however the receiver have to aware of the
3457 * order. KRB5_CRYPTO_TYPE_SIGN_ONLY is commonly used unencrypoted
3458 * protocol headers and trailers. The output data will be of same
3459 * size as the input data or shorter.
3462 krb5_error_code KRB5_LIB_FUNCTION
3463 krb5_decrypt_iov_ivec(krb5_context context,
3466 krb5_crypto_iov *data,
3467 unsigned int num_data,
3471 size_t headersz, trailersz, len;
3473 unsigned char *p, *q;
3474 krb5_error_code ret;
3475 struct key_data *dkey;
3476 struct encryption_type *et = crypto->et;
3477 krb5_crypto_iov *tiv, *hiv;
3480 krb5_clear_error_message(context);
3481 return KRB5_CRYPTO_INTERNAL;
3484 if(!derived_crypto(context, crypto)) {
3485 krb5_clear_error_message(context);
3486 return KRB5_CRYPTO_INTERNAL;
3489 headersz = et->confoundersize;
3491 hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
3492 if (hiv == NULL || hiv->data.length != headersz)
3493 return KRB5_BAD_MSIZE;
3496 trailersz = CHECKSUMSIZE(et->keyed_checksum);
3498 tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
3499 if (tiv->data.length != trailersz)
3500 return KRB5_BAD_MSIZE;
3502 /* Find length of data we will decrypt */
3505 for (i = 0; i < num_data; i++) {
3506 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3508 len += data[i].data.length;
3511 if ((len % et->padsize) != 0) {
3512 krb5_clear_error_message(context);
3513 return KRB5_BAD_MSIZE;
3516 /* XXX replace with EVP_Cipher */
3518 p = q = malloc(len);
3522 memcpy(q, hiv->data.data, hiv->data.length);
3523 q += hiv->data.length;
3525 for (i = 0; i < num_data; i++) {
3526 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3528 memcpy(q, data[i].data.data, data[i].data.length);
3529 q += data[i].data.length;
3532 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3537 ret = _key_schedule(context, dkey);
3543 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3549 /* copy data back to buffers */
3550 memcpy(hiv->data.data, p, hiv->data.length);
3551 q = p + hiv->data.length;
3552 for (i = 0; i < num_data; i++) {
3553 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3555 memcpy(data[i].data.data, q, data[i].data.length);
3556 q += data[i].data.length;
3561 /* check signature */
3562 for (i = 0; i < num_data; i++) {
3563 if (data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3565 len += data[i].data.length;
3568 p = q = malloc(len);
3572 memcpy(q, hiv->data.data, hiv->data.length);
3573 q += hiv->data.length;
3574 for (i = 0; i < num_data; i++) {
3575 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3576 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3578 memcpy(q, data[i].data.data, data[i].data.length);
3579 q += data[i].data.length;
3582 cksum.checksum.data = tiv->data.data;
3583 cksum.checksum.length = tiv->data.length;
3584 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3586 ret = verify_checksum(context,
3588 INTEGRITY_USAGE(usage),
3597 * Create a Kerberos message checksum.
3599 * @param context Kerberos context
3600 * @param crypto Kerberos crypto context
3601 * @param usage Key usage for this buffer
3602 * @param data array of buffers to process
3603 * @param num_data length of array
3604 * @param type output data
3606 * @return Return an error code or 0.
3607 * @ingroup krb5_crypto
3610 krb5_error_code KRB5_LIB_FUNCTION
3611 krb5_create_checksum_iov(krb5_context context,
3614 krb5_crypto_iov *data,
3615 unsigned int num_data,
3616 krb5_cksumtype *type)
3619 krb5_crypto_iov *civ;
3620 krb5_error_code ret;
3626 krb5_clear_error_message(context);
3627 return KRB5_CRYPTO_INTERNAL;
3630 if(!derived_crypto(context, crypto)) {
3631 krb5_clear_error_message(context);
3632 return KRB5_CRYPTO_INTERNAL;
3635 civ = find_iv(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
3637 return KRB5_BAD_MSIZE;
3640 for (i = 0; i < num_data; i++) {
3641 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3642 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3644 len += data[i].data.length;
3647 p = q = malloc(len);
3649 for (i = 0; i < num_data; i++) {
3650 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3651 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3653 memcpy(q, data[i].data.data, data[i].data.length);
3654 q += data[i].data.length;
3657 ret = krb5_create_checksum(context, crypto, usage, 0, p, len, &cksum);
3663 *type = cksum.cksumtype;
3665 if (cksum.checksum.length > civ->data.length) {
3666 krb5_set_error_message(context, KRB5_BAD_MSIZE,
3667 N_("Checksum larger then input buffer", ""));
3668 free_Checksum(&cksum);
3669 return KRB5_BAD_MSIZE;
3672 civ->data.length = cksum.checksum.length;
3673 memcpy(civ->data.data, cksum.checksum.data, civ->data.length);
3674 free_Checksum(&cksum);
3680 * Verify a Kerberos message checksum.
3682 * @param context Kerberos context
3683 * @param crypto Kerberos crypto context
3684 * @param usage Key usage for this buffer
3685 * @param data array of buffers to process
3686 * @param num_data length of array
3687 * @param type return checksum type if not NULL
3689 * @return Return an error code or 0.
3690 * @ingroup krb5_crypto
3693 krb5_error_code KRB5_LIB_FUNCTION
3694 krb5_verify_checksum_iov(krb5_context context,
3697 krb5_crypto_iov *data,
3698 unsigned int num_data,
3699 krb5_cksumtype *type)
3701 struct encryption_type *et = crypto->et;
3703 krb5_crypto_iov *civ;
3704 krb5_error_code ret;
3710 krb5_clear_error_message(context);
3711 return KRB5_CRYPTO_INTERNAL;
3714 if(!derived_crypto(context, crypto)) {
3715 krb5_clear_error_message(context);
3716 return KRB5_CRYPTO_INTERNAL;
3719 civ = find_iv(data, num_data, KRB5_CRYPTO_TYPE_CHECKSUM);
3721 return KRB5_BAD_MSIZE;
3724 for (i = 0; i < num_data; i++) {
3725 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3726 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3728 len += data[i].data.length;
3731 p = q = malloc(len);
3733 for (i = 0; i < num_data; i++) {
3734 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3735 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3737 memcpy(q, data[i].data.data, data[i].data.length);
3738 q += data[i].data.length;
3741 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3742 cksum.checksum.length = civ->data.length;
3743 cksum.checksum.data = civ->data.data;
3745 ret = krb5_verify_checksum(context, crypto, usage, p, len, &cksum);
3748 if (ret == 0 && type)
3749 *type = cksum.cksumtype;
3755 krb5_error_code KRB5_LIB_FUNCTION
3756 krb5_crypto_length(krb5_context context,
3761 if (!derived_crypto(context, crypto)) {
3762 krb5_set_error_message(context, EINVAL, "not a derived crypto");
3767 case KRB5_CRYPTO_TYPE_EMPTY:
3770 case KRB5_CRYPTO_TYPE_HEADER:
3771 *len = crypto->et->blocksize;
3773 case KRB5_CRYPTO_TYPE_DATA:
3774 case KRB5_CRYPTO_TYPE_SIGN_ONLY:
3775 /* len must already been filled in */
3777 case KRB5_CRYPTO_TYPE_PADDING:
3778 if (crypto->et->padsize > 1)
3779 *len = crypto->et->padsize;
3783 case KRB5_CRYPTO_TYPE_TRAILER:
3784 *len = CHECKSUMSIZE(crypto->et->keyed_checksum);
3786 case KRB5_CRYPTO_TYPE_CHECKSUM:
3787 if (crypto->et->keyed_checksum)
3788 *len = CHECKSUMSIZE(crypto->et->keyed_checksum);
3790 *len = CHECKSUMSIZE(crypto->et->checksum);
3793 krb5_set_error_message(context, EINVAL,
3794 "%d not a supported type", type);
3799 krb5_error_code KRB5_LIB_FUNCTION
3800 krb5_crypto_length_iov(krb5_context context,
3802 krb5_crypto_iov *data,
3803 unsigned int num_data)
3805 krb5_error_code ret;
3808 for (i = 0; i < num_data; i++) {
3809 ret = krb5_crypto_length(context, crypto,
3811 &data[i].data.length);
3819 krb5_error_code KRB5_LIB_FUNCTION
3820 krb5_encrypt_ivec(krb5_context context,
3828 if(derived_crypto(context, crypto))
3829 return encrypt_internal_derived(context, crypto, usage,
3830 data, len, result, ivec);
3831 else if (special_crypto(context, crypto))
3832 return encrypt_internal_special (context, crypto, usage,
3833 data, len, result, ivec);
3835 return encrypt_internal(context, crypto, data, len, result, ivec);
3838 krb5_error_code KRB5_LIB_FUNCTION
3839 krb5_encrypt(krb5_context context,
3846 return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
3849 krb5_error_code KRB5_LIB_FUNCTION
3850 krb5_encrypt_EncryptedData(krb5_context context,
3856 EncryptedData *result)
3858 result->etype = CRYPTO_ETYPE(crypto);
3860 ALLOC(result->kvno, 1);
3861 *result->kvno = kvno;
3863 result->kvno = NULL;
3864 return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
3867 krb5_error_code KRB5_LIB_FUNCTION
3868 krb5_decrypt_ivec(krb5_context context,
3876 if(derived_crypto(context, crypto))
3877 return decrypt_internal_derived(context, crypto, usage,
3878 data, len, result, ivec);
3879 else if (special_crypto (context, crypto))
3880 return decrypt_internal_special(context, crypto, usage,
3881 data, len, result, ivec);
3883 return decrypt_internal(context, crypto, data, len, result, ivec);
3886 krb5_error_code KRB5_LIB_FUNCTION
3887 krb5_decrypt(krb5_context context,
3894 return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
3898 krb5_error_code KRB5_LIB_FUNCTION
3899 krb5_decrypt_EncryptedData(krb5_context context,
3902 const EncryptedData *e,
3905 return krb5_decrypt(context, crypto, usage,
3906 e->cipher.data, e->cipher.length, result);
3909 /************************************************************
3911 ************************************************************/
3913 #define ENTROPY_NEEDED 128
3916 seed_something(void)
3918 char buf[1024], seedfile[256];
3920 /* If there is a seed file, load it. But such a file cannot be trusted,
3921 so use 0 for the entropy estimate */
3922 if (RAND_file_name(seedfile, sizeof(seedfile))) {
3924 fd = open(seedfile, O_RDONLY | O_BINARY | O_CLOEXEC);
3928 ret = read(fd, buf, sizeof(buf));
3930 RAND_add(buf, ret, 0.0);
3937 /* Calling RAND_status() will try to use /dev/urandom if it exists so
3938 we do not have to deal with it. */
3939 if (RAND_status() != 1) {
3940 krb5_context context;
3944 if (!krb5_init_context(&context)) {
3945 p = krb5_config_get_string(context, NULL, "libdefaults",
3946 "egd_socket", NULL);
3948 RAND_egd_bytes(p, ENTROPY_NEEDED);
3949 krb5_free_context(context);
3953 if (RAND_status() == 1) {
3954 /* Update the seed file */
3956 RAND_write_file(seedfile);
3963 void KRB5_LIB_FUNCTION
3964 krb5_generate_random_block(void *buf, size_t len)
3966 static int rng_initialized = 0;
3968 HEIMDAL_MUTEX_lock(&crypto_mutex);
3969 if (!rng_initialized) {
3970 if (seed_something())
3971 krb5_abortx(NULL, "Fatal: could not seed the "
3972 "random number generator");
3974 rng_initialized = 1;
3976 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3977 if (RAND_bytes(buf, len) != 1)
3978 krb5_abortx(NULL, "Failed to generate random block");
3981 static krb5_error_code
3982 derive_key(krb5_context context,
3983 struct encryption_type *et,
3984 struct key_data *key,
3985 const void *constant,
3988 unsigned char *k = NULL;
3989 unsigned int nblocks = 0, i;
3990 krb5_error_code ret = 0;
3991 struct key_type *kt = et->keytype;
3993 ret = _key_schedule(context, key);
3996 if(et->blocksize * 8 < kt->bits || len != et->blocksize) {
3997 nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
3998 k = malloc(nblocks * et->blocksize);
4001 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4004 ret = _krb5_n_fold(constant, len, k, et->blocksize);
4006 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4010 for(i = 0; i < nblocks; i++) {
4012 memcpy(k + i * et->blocksize,
4013 k + (i - 1) * et->blocksize,
4015 (*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
4019 /* this case is probably broken, but won't be run anyway */
4020 void *c = malloc(len);
4021 size_t res_len = (kt->bits + 7) / 8;
4023 if(len != 0 && c == NULL) {
4025 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4028 memcpy(c, constant, len);
4029 (*et->encrypt)(context, key, c, len, 1, 0, NULL);
4030 k = malloc(res_len);
4031 if(res_len != 0 && k == NULL) {
4034 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4037 ret = _krb5_n_fold(c, len, k, res_len);
4040 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4045 /* XXX keytype dependent post-processing */
4048 DES3_random_to_key(context, key->key, k, nblocks * et->blocksize);
4050 case KEYTYPE_AES128:
4051 case KEYTYPE_AES256:
4052 memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
4055 ret = KRB5_CRYPTO_INTERNAL;
4056 krb5_set_error_message(context, ret,
4057 N_("derive_key() called with unknown keytype (%u)", ""),
4062 if (key->schedule) {
4063 free_key_schedule(context, key, et);
4064 key->schedule = NULL;
4067 memset(k, 0, nblocks * et->blocksize);
4073 static struct key_data *
4074 _new_derived_key(krb5_crypto crypto, unsigned usage)
4076 struct key_usage *d = crypto->key_usage;
4077 d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
4080 crypto->key_usage = d;
4081 d += crypto->num_key_usage++;
4082 memset(d, 0, sizeof(*d));
4087 krb5_error_code KRB5_LIB_FUNCTION
4088 krb5_derive_key(krb5_context context,
4089 const krb5_keyblock *key,
4091 const void *constant,
4092 size_t constant_len,
4093 krb5_keyblock **derived_key)
4095 krb5_error_code ret;
4096 struct encryption_type *et;
4099 *derived_key = NULL;
4101 et = _find_enctype (etype);
4103 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4104 N_("encryption type %d not supported", ""),
4106 return KRB5_PROG_ETYPE_NOSUPP;
4109 ret = krb5_copy_keyblock(context, key, &d.key);
4114 ret = derive_key(context, et, &d, constant, constant_len);
4116 ret = krb5_copy_keyblock(context, d.key, derived_key);
4117 free_key_data(context, &d, et);
4121 static krb5_error_code
4122 _get_derived_key(krb5_context context,
4125 struct key_data **key)
4129 unsigned char constant[5];
4131 for(i = 0; i < crypto->num_key_usage; i++)
4132 if(crypto->key_usage[i].usage == usage) {
4133 *key = &crypto->key_usage[i].key;
4136 d = _new_derived_key(crypto, usage);
4138 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4141 krb5_copy_keyblock(context, crypto->key.key, &d->key);
4142 _krb5_put_int(constant, usage, 5);
4143 derive_key(context, crypto->et, d, constant, sizeof(constant));
4149 * Create a crypto context used for all encryption and signature
4150 * operation. The encryption type to use is taken from the key, but
4151 * can be overridden with the enctype parameter. This can be useful
4152 * for encryptions types which is compatiable (DES for example).
4154 * To free the crypto context, use krb5_crypto_destroy().
4156 * @param context Kerberos context
4157 * @param key the key block information with all key data
4158 * @param etype the encryption type
4159 * @param crypto the resulting crypto context
4161 * @return Return an error code or 0.
4163 * @ingroup krb5_crypto
4166 krb5_error_code KRB5_LIB_FUNCTION
4167 krb5_crypto_init(krb5_context context,
4168 const krb5_keyblock *key,
4170 krb5_crypto *crypto)
4172 krb5_error_code ret;
4174 if(*crypto == NULL) {
4175 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4178 if(etype == ETYPE_NULL)
4179 etype = key->keytype;
4180 (*crypto)->et = _find_enctype(etype);
4181 if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
4184 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4185 N_("encryption type %d not supported", ""),
4187 return KRB5_PROG_ETYPE_NOSUPP;
4189 if((*crypto)->et->keytype->size != key->keyvalue.length) {
4192 krb5_set_error_message (context, KRB5_BAD_KEYSIZE,
4193 "encryption key has bad length");
4194 return KRB5_BAD_KEYSIZE;
4196 ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
4202 (*crypto)->key.schedule = NULL;
4203 (*crypto)->num_key_usage = 0;
4204 (*crypto)->key_usage = NULL;
4209 free_key_schedule(krb5_context context,
4210 struct key_data *key,
4211 struct encryption_type *et)
4213 if (et->keytype->cleanup)
4214 (*et->keytype->cleanup)(context, key);
4215 memset(key->schedule->data, 0, key->schedule->length);
4216 krb5_free_data(context, key->schedule);
4220 free_key_data(krb5_context context, struct key_data *key,
4221 struct encryption_type *et)
4223 krb5_free_keyblock(context, key->key);
4225 free_key_schedule(context, key, et);
4226 key->schedule = NULL;
4231 free_key_usage(krb5_context context, struct key_usage *ku,
4232 struct encryption_type *et)
4234 free_key_data(context, &ku->key, et);
4238 * Free a crypto context created by krb5_crypto_init().
4240 * @param context Kerberos context
4241 * @param crypto crypto context to free
4243 * @return Return an error code or 0.
4245 * @ingroup krb5_crypto
4248 krb5_error_code KRB5_LIB_FUNCTION
4249 krb5_crypto_destroy(krb5_context context,
4254 for(i = 0; i < crypto->num_key_usage; i++)
4255 free_key_usage(context, &crypto->key_usage[i], crypto->et);
4256 free(crypto->key_usage);
4257 free_key_data(context, &crypto->key, crypto->et);
4263 * Return the blocksize used algorithm referenced by the crypto context
4265 * @param context Kerberos context
4266 * @param crypto crypto context to query
4267 * @param blocksize the resulting blocksize
4269 * @return Return an error code or 0.
4271 * @ingroup krb5_crypto
4274 krb5_error_code KRB5_LIB_FUNCTION
4275 krb5_crypto_getblocksize(krb5_context context,
4279 *blocksize = crypto->et->blocksize;
4284 * Return the encryption type used by the crypto context
4286 * @param context Kerberos context
4287 * @param crypto crypto context to query
4288 * @param enctype the resulting encryption type
4290 * @return Return an error code or 0.
4292 * @ingroup krb5_crypto
4295 krb5_error_code KRB5_LIB_FUNCTION
4296 krb5_crypto_getenctype(krb5_context context,
4298 krb5_enctype *enctype)
4300 *enctype = crypto->et->type;
4305 * Return the padding size used by the crypto context
4307 * @param context Kerberos context
4308 * @param crypto crypto context to query
4309 * @param padsize the return padding size
4311 * @return Return an error code or 0.
4313 * @ingroup krb5_crypto
4316 krb5_error_code KRB5_LIB_FUNCTION
4317 krb5_crypto_getpadsize(krb5_context context,
4321 *padsize = crypto->et->padsize;
4326 * Return the confounder size used by the crypto context
4328 * @param context Kerberos context
4329 * @param crypto crypto context to query
4330 * @param confoundersize the returned confounder size
4332 * @return Return an error code or 0.
4334 * @ingroup krb5_crypto
4337 krb5_error_code KRB5_LIB_FUNCTION
4338 krb5_crypto_getconfoundersize(krb5_context context,
4340 size_t *confoundersize)
4342 *confoundersize = crypto->et->confoundersize;
4348 * Disable encryption type
4350 * @param context Kerberos 5 context
4351 * @param enctype encryption type to disable
4353 * @return Return an error code or 0.
4355 * @ingroup krb5_crypto
4358 krb5_error_code KRB5_LIB_FUNCTION
4359 krb5_enctype_disable(krb5_context context,
4360 krb5_enctype enctype)
4362 struct encryption_type *et = _find_enctype(enctype);
4365 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4366 N_("encryption type %d not supported", ""),
4368 return KRB5_PROG_ETYPE_NOSUPP;
4370 et->flags |= F_DISABLED;
4375 * Enable encryption type
4377 * @param context Kerberos 5 context
4378 * @param enctype encryption type to enable
4380 * @return Return an error code or 0.
4382 * @ingroup krb5_crypto
4385 krb5_error_code KRB5_LIB_FUNCTION
4386 krb5_enctype_enable(krb5_context context,
4387 krb5_enctype enctype)
4389 struct encryption_type *et = _find_enctype(enctype);
4392 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4393 N_("encryption type %d not supported", ""),
4395 return KRB5_PROG_ETYPE_NOSUPP;
4397 et->flags &= ~F_DISABLED;
4402 krb5_error_code KRB5_LIB_FUNCTION
4403 krb5_string_to_key_derived(krb5_context context,
4409 struct encryption_type *et = _find_enctype(etype);
4410 krb5_error_code ret;
4416 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4417 N_("encryption type %d not supported", ""),
4419 return KRB5_PROG_ETYPE_NOSUPP;
4421 keylen = et->keytype->bits / 8;
4424 if(kd.key == NULL) {
4425 krb5_set_error_message (context, ENOMEM,
4426 N_("malloc: out of memory", ""));
4429 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
4434 kd.key->keytype = etype;
4435 tmp = malloc (keylen);
4437 krb5_free_keyblock(context, kd.key);
4438 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
4441 ret = _krb5_n_fold(str, len, tmp, keylen);
4444 krb5_set_error_message (context, ENOMEM, N_("malloc: out of memory", ""));
4448 DES3_random_to_key(context, kd.key, tmp, keylen);
4449 memset(tmp, 0, keylen);
4451 ret = derive_key(context,
4454 "kerberos", /* XXX well known constant */
4455 strlen("kerberos"));
4457 free_key_data(context, &kd, et);
4460 ret = krb5_copy_keyblock_contents(context, kd.key, key);
4461 free_key_data(context, &kd, et);
4466 wrapped_length (krb5_context context,
4470 struct encryption_type *et = crypto->et;
4471 size_t padsize = et->padsize;
4472 size_t checksumsize = CHECKSUMSIZE(et->checksum);
4475 res = et->confoundersize + checksumsize + data_len;
4476 res = (res + padsize - 1) / padsize * padsize;
4481 wrapped_length_dervied (krb5_context context,
4485 struct encryption_type *et = crypto->et;
4486 size_t padsize = et->padsize;
4489 res = et->confoundersize + data_len;
4490 res = (res + padsize - 1) / padsize * padsize;
4491 if (et->keyed_checksum)
4492 res += et->keyed_checksum->checksumsize;
4494 res += et->checksum->checksumsize;
4499 * Return the size of an encrypted packet of length `data_len'
4503 krb5_get_wrapped_length (krb5_context context,
4507 if (derived_crypto (context, crypto))
4508 return wrapped_length_dervied (context, crypto, data_len);
4510 return wrapped_length (context, crypto, data_len);
4514 * Return the size of an encrypted packet of length `data_len'
4518 crypto_overhead (krb5_context context,
4521 struct encryption_type *et = crypto->et;
4524 res = CHECKSUMSIZE(et->checksum);
4525 res += et->confoundersize;
4526 if (et->padsize > 1)
4532 crypto_overhead_dervied (krb5_context context,
4535 struct encryption_type *et = crypto->et;
4538 if (et->keyed_checksum)
4539 res = CHECKSUMSIZE(et->keyed_checksum);
4541 res = CHECKSUMSIZE(et->checksum);
4542 res += et->confoundersize;
4543 if (et->padsize > 1)
4549 krb5_crypto_overhead (krb5_context context, krb5_crypto crypto)
4551 if (derived_crypto (context, crypto))
4552 return crypto_overhead_dervied (context, crypto);
4554 return crypto_overhead (context, crypto);
4558 * Converts the random bytestring to a protocol key according to
4559 * Kerberos crypto frame work. It may be assumed that all the bits of
4560 * the input string are equally random, even though the entropy
4561 * present in the random source may be limited.
4563 * @param context Kerberos 5 context
4564 * @param type the enctype resulting key will be of
4565 * @param data input random data to convert to a key
4566 * @param size size of input random data, at least krb5_enctype_keysize() long
4567 * @param key key, output key, free with krb5_free_keyblock_contents()
4569 * @return Return an error code or 0.
4571 * @ingroup krb5_crypto
4574 krb5_error_code KRB5_LIB_FUNCTION
4575 krb5_random_to_key(krb5_context context,
4581 krb5_error_code ret;
4582 struct encryption_type *et = _find_enctype(type);
4584 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4585 N_("encryption type %d not supported", ""),
4587 return KRB5_PROG_ETYPE_NOSUPP;
4589 if ((et->keytype->bits + 7) / 8 > size) {
4590 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4591 N_("encryption key %s needs %d bytes "
4592 "of random to make an encryption key "
4594 et->name, (int)et->keytype->size);
4595 return KRB5_PROG_ETYPE_NOSUPP;
4597 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
4600 key->keytype = type;
4601 if (et->keytype->random_to_key)
4602 (*et->keytype->random_to_key)(context, key, data, size);
4604 memcpy(key->keyvalue.data, data, et->keytype->size);
4610 _krb5_pk_octetstring2key(krb5_context context,
4614 const heim_octet_string *c_n,
4615 const heim_octet_string *k_n,
4618 struct encryption_type *et = _find_enctype(type);
4619 krb5_error_code ret;
4620 size_t keylen, offset;
4622 unsigned char counter;
4623 unsigned char shaoutput[SHA_DIGEST_LENGTH];
4627 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4628 N_("encryption type %d not supported", ""),
4630 return KRB5_PROG_ETYPE_NOSUPP;
4632 keylen = (et->keytype->bits + 7) / 8;
4634 keydata = malloc(keylen);
4635 if (keydata == NULL) {
4636 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4640 m = EVP_MD_CTX_create();
4643 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4651 EVP_DigestInit_ex(m, EVP_sha1(), NULL);
4652 EVP_DigestUpdate(m, &counter, 1);
4653 EVP_DigestUpdate(m, dhdata, dhsize);
4656 EVP_DigestUpdate(m, c_n->data, c_n->length);
4658 EVP_DigestUpdate(m, k_n->data, k_n->length);
4660 EVP_DigestFinal_ex(m, shaoutput, NULL);
4662 memcpy((unsigned char *)keydata + offset,
4664 min(keylen - offset, sizeof(shaoutput)));
4666 offset += sizeof(shaoutput);
4668 } while(offset < keylen);
4669 memset(shaoutput, 0, sizeof(shaoutput));
4671 EVP_MD_CTX_destroy(m);
4673 ret = krb5_random_to_key(context, type, keydata, keylen, key);
4674 memset(keydata, 0, sizeof(keylen));
4679 static krb5_error_code
4680 encode_uvinfo(krb5_context context, krb5_const_principal p, krb5_data *data)
4682 KRB5PrincipalName pn;
4683 krb5_error_code ret;
4686 pn.principalName = p->name;
4687 pn.realm = p->realm;
4689 ASN1_MALLOC_ENCODE(KRB5PrincipalName, data->data, data->length,
4692 krb5_data_zero(data);
4693 krb5_set_error_message(context, ret,
4694 N_("Failed to encode KRB5PrincipalName", ""));
4697 if (data->length != size)
4698 krb5_abortx(context, "asn1 compiler internal error");
4702 static krb5_error_code
4703 encode_otherinfo(krb5_context context,
4704 const AlgorithmIdentifier *ai,
4705 krb5_const_principal client,
4706 krb5_const_principal server,
4707 krb5_enctype enctype,
4708 const krb5_data *as_req,
4709 const krb5_data *pk_as_rep,
4710 const Ticket *ticket,
4713 PkinitSP80056AOtherInfo otherinfo;
4714 PkinitSuppPubInfo pubinfo;
4715 krb5_error_code ret;
4719 krb5_data_zero(other);
4720 memset(&otherinfo, 0, sizeof(otherinfo));
4721 memset(&pubinfo, 0, sizeof(pubinfo));
4723 pubinfo.enctype = enctype;
4724 pubinfo.as_REQ = *as_req;
4725 pubinfo.pk_as_rep = *pk_as_rep;
4726 pubinfo.ticket = *ticket;
4727 ASN1_MALLOC_ENCODE(PkinitSuppPubInfo, pub.data, pub.length,
4728 &pubinfo, &size, ret);
4730 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4733 if (pub.length != size)
4734 krb5_abortx(context, "asn1 compiler internal error");
4736 ret = encode_uvinfo(context, client, &otherinfo.partyUInfo);
4741 ret = encode_uvinfo(context, server, &otherinfo.partyVInfo);
4743 free(otherinfo.partyUInfo.data);
4748 otherinfo.algorithmID = *ai;
4749 otherinfo.suppPubInfo = &pub;
4751 ASN1_MALLOC_ENCODE(PkinitSP80056AOtherInfo, other->data, other->length,
4752 &otherinfo, &size, ret);
4753 free(otherinfo.partyUInfo.data);
4754 free(otherinfo.partyVInfo.data);
4757 krb5_set_error_message(context, ret, N_("malloc: out of memory", ""));
4760 if (other->length != size)
4761 krb5_abortx(context, "asn1 compiler internal error");
4767 _krb5_pk_kdf(krb5_context context,
4768 const struct AlgorithmIdentifier *ai,
4771 krb5_const_principal client,
4772 krb5_const_principal server,
4773 krb5_enctype enctype,
4774 const krb5_data *as_req,
4775 const krb5_data *pk_as_rep,
4776 const Ticket *ticket,
4779 struct encryption_type *et;
4780 krb5_error_code ret;
4782 size_t keylen, offset;
4784 unsigned char *keydata;
4785 unsigned char shaoutput[SHA_DIGEST_LENGTH];
4788 if (der_heim_oid_cmp(&asn1_oid_id_pkinit_kdf_ah_sha1, &ai->algorithm) != 0) {
4789 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4790 N_("KDF not supported", ""));
4791 return KRB5_PROG_ETYPE_NOSUPP;
4793 if (ai->parameters != NULL &&
4794 (ai->parameters->length != 2 ||
4795 memcmp(ai->parameters->data, "\x05\x00", 2) != 0))
4797 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4798 N_("kdf params not NULL or the NULL-type",
4800 return KRB5_PROG_ETYPE_NOSUPP;
4803 et = _find_enctype(enctype);
4805 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4806 N_("encryption type %d not supported", ""),
4808 return KRB5_PROG_ETYPE_NOSUPP;
4810 keylen = (et->keytype->bits + 7) / 8;
4812 keydata = malloc(keylen);
4813 if (keydata == NULL) {
4814 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4818 ret = encode_otherinfo(context, ai, client, server,
4819 enctype, as_req, pk_as_rep, ticket, &other);
4825 m = EVP_MD_CTX_create();
4829 krb5_set_error_message(context, ENOMEM, N_("malloc: out of memory", ""));
4836 unsigned char cdata[4];
4838 EVP_DigestInit_ex(m, EVP_sha1(), NULL);
4839 _krb5_put_int(cdata, counter, 4);
4840 EVP_DigestUpdate(m, cdata, 4);
4841 EVP_DigestUpdate(m, dhdata, dhsize);
4842 EVP_DigestUpdate(m, other.data, other.length);
4844 EVP_DigestFinal_ex(m, shaoutput, NULL);
4846 memcpy((unsigned char *)keydata + offset,
4848 min(keylen - offset, sizeof(shaoutput)));
4850 offset += sizeof(shaoutput);
4852 } while(offset < keylen);
4853 memset(shaoutput, 0, sizeof(shaoutput));
4855 EVP_MD_CTX_destroy(m);
4858 ret = krb5_random_to_key(context, enctype, keydata, keylen, key);
4859 memset(keydata, 0, sizeof(keylen));
4866 krb5_error_code KRB5_LIB_FUNCTION
4867 krb5_crypto_prf_length(krb5_context context,
4871 struct encryption_type *et = _find_enctype(type);
4873 if(et == NULL || et->prf_length == 0) {
4874 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4875 N_("encryption type %d not supported", ""),
4877 return KRB5_PROG_ETYPE_NOSUPP;
4880 *length = et->prf_length;
4884 krb5_error_code KRB5_LIB_FUNCTION
4885 krb5_crypto_prf(krb5_context context,
4886 const krb5_crypto crypto,
4887 const krb5_data *input,
4890 struct encryption_type *et = crypto->et;
4892 krb5_data_zero(output);
4894 if(et->prf == NULL) {
4895 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4896 "kerberos prf for %s not supported",
4898 return KRB5_PROG_ETYPE_NOSUPP;
4901 return (*et->prf)(context, crypto, input, output);
4904 static krb5_error_code
4905 krb5_crypto_prfplus(krb5_context context,
4906 const krb5_crypto crypto,
4907 const krb5_data *input,
4911 krb5_error_code ret;
4913 unsigned char i = 1;
4916 krb5_data_zero(&input2);
4917 krb5_data_zero(output);
4919 krb5_clear_error_message(context);
4921 ret = krb5_data_alloc(output, length);
4923 ret = krb5_data_alloc(&input2, input->length + 1);
4926 krb5_clear_error_message(context);
4928 memcpy(((unsigned char *)input2.data) + 1, input->data, input->length);
4935 ((unsigned char *)input2.data)[0] = i++;
4937 ret = krb5_crypto_prf(context, crypto, &input2, &block);
4941 if (block.length < length) {
4942 memcpy(p, block.data, block.length);
4943 length -= block.length;
4945 memcpy(p, block.data, length);
4949 krb5_data_free(&block);
4953 krb5_data_free(&input2);
4955 krb5_data_free(output);
4960 * The FX-CF2 key derivation function, used in FAST and preauth framework.
4962 * @param context Kerberos 5 context
4963 * @param crypto1 first key to combine
4964 * @param crypto2 second key to combine
4965 * @param pepper1 factor to combine with first key to garante uniqueness
4966 * @param pepper2 factor to combine with second key to garante uniqueness
4967 * @param enctype the encryption type of the resulting key
4968 * @param res allocated key, free with krb5_free_keyblock_contents()
4970 * @return Return an error code or 0.
4972 * @ingroup krb5_crypto
4975 krb5_error_code KRB5_LIB_FUNCTION
4976 krb5_crypto_fx_cf2(krb5_context context,
4977 const krb5_crypto crypto1,
4978 const krb5_crypto crypto2,
4981 krb5_enctype enctype,
4984 krb5_error_code ret;
4988 memset(res, 0, sizeof(*res));
4990 ret = krb5_enctype_keysize(context, enctype, &keysize);
4994 ret = krb5_data_alloc(&res->keyvalue, keysize);
4997 ret = krb5_crypto_prfplus(context, crypto1, pepper1, keysize, &os1);
5000 ret = krb5_crypto_prfplus(context, crypto2, pepper2, keysize, &os2);
5004 res->keytype = enctype;
5006 unsigned char *p1 = os1.data, *p2 = os2.data, *p3 = res->keyvalue.data;
5007 for (i = 0; i < keysize; i++)
5008 p3[i] = p1[i] ^ p2[i];
5012 krb5_data_free(&res->keyvalue);
5013 krb5_data_free(&os1);
5014 krb5_data_free(&os2);
5021 #ifndef HEIMDAL_SMALLER
5023 krb5_error_code KRB5_LIB_FUNCTION
5024 krb5_keytype_to_enctypes (krb5_context context,
5025 krb5_keytype keytype,
5034 for (i = num_etypes - 1; i >= 0; --i) {
5035 if (etypes[i]->keytype->type == keytype
5036 && !(etypes[i]->flags & F_PSEUDO)
5037 && krb5_enctype_valid(context, etypes[i]->type) == 0)
5041 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
5042 "Keytype have no mapping");
5043 return KRB5_PROG_KEYTYPE_NOSUPP;
5046 ret = malloc(n * sizeof(*ret));
5047 if (ret == NULL && n != 0) {
5048 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
5052 for (i = num_etypes - 1; i >= 0; --i) {
5053 if (etypes[i]->keytype->type == keytype
5054 && !(etypes[i]->flags & F_PSEUDO)
5055 && krb5_enctype_valid(context, etypes[i]->type) == 0)
5056 ret[n++] = etypes[i]->type;
5063 /* if two enctypes have compatible keys */
5064 krb5_boolean KRB5_LIB_FUNCTION
5065 krb5_enctypes_compatible_keys(krb5_context context,
5066 krb5_enctype etype1,
5067 krb5_enctype etype2)
5070 struct encryption_type *e1 = _find_enctype(etype1);
5071 struct encryption_type *e2 = _find_enctype(etype2);
5072 return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
5075 #endif /* HEIMDAL_SMALLER */