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 #include "krb5_locl.h"
36 #include <pkinit_asn1.h>
39 #define __attribute__(X)
41 #ifndef HEIMDAL_SMALLER
42 #define WEAK_ENCTYPES 1
43 #define DES3_OLD_ENCTYPE 1
47 #ifdef HAVE_OPENSSL /* XXX forward decl for hcrypto glue */
48 const EVP_CIPHER * _krb5_EVP_hcrypto_aes_128_cts(void);
49 const EVP_CIPHER * _krb5_EVP_hcrypto_aes_256_cts(void);
50 #define EVP_hcrypto_aes_128_cts _krb5_EVP_hcrypto_aes_128_cts
51 #define EVP_hcrypto_aes_256_cts _krb5_EVP_hcrypto_aes_256_cts
64 struct krb5_crypto_data {
65 struct encryption_type *et;
68 struct key_usage *key_usage;
71 #define CRYPTO_ETYPE(C) ((C)->et->type)
73 /* bits for `flags' below */
74 #define F_KEYED 1 /* checksum is keyed */
75 #define F_CPROOF 2 /* checksum is collision proof */
76 #define F_DERIVED 4 /* uses derived keys */
77 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */
78 #define F_PSEUDO 16 /* not a real protocol type */
79 #define F_SPECIAL 32 /* backwards */
80 #define F_DISABLED 64 /* enctype/checksum disabled */
85 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
86 krb5_salt, krb5_data, krb5_keyblock*);
90 krb5_keytype type; /* XXX */
95 void (*random_key)(krb5_context, krb5_keyblock*);
96 void (*schedule)(krb5_context, struct key_type *, struct key_data *);
97 struct salt_type *string_to_key;
98 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
99 void (*cleanup)(krb5_context, struct key_data *);
100 const EVP_CIPHER *(*evp)(void);
103 struct checksum_type {
109 krb5_enctype (*checksum)(krb5_context context,
110 struct key_data *key,
111 const void *buf, size_t len,
114 krb5_error_code (*verify)(krb5_context context,
115 struct key_data *key,
116 const void *buf, size_t len,
121 struct encryption_type {
126 size_t confoundersize;
127 struct key_type *keytype;
128 struct checksum_type *checksum;
129 struct checksum_type *keyed_checksum;
131 krb5_error_code (*encrypt)(krb5_context context,
132 struct key_data *key,
133 void *data, size_t len,
134 krb5_boolean encryptp,
138 krb5_error_code (*prf)(krb5_context,
139 krb5_crypto, const krb5_data *, krb5_data *);
142 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
143 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55)
144 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99)
146 static struct checksum_type *_find_checksum(krb5_cksumtype type);
147 static struct encryption_type *_find_enctype(krb5_enctype type);
148 static struct key_type *_find_keytype(krb5_keytype type);
149 static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
150 unsigned, struct key_data**);
151 static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
152 static krb5_error_code derive_key(krb5_context context,
153 struct encryption_type *et,
154 struct key_data *key,
155 const void *constant,
157 static krb5_error_code hmac(krb5_context context,
158 struct checksum_type *cm,
162 struct key_data *keyblock,
164 static void free_key_data(krb5_context,
166 struct encryption_type *);
167 static krb5_error_code usage2arcfour (krb5_context, unsigned *);
168 static void xor (DES_cblock *, const unsigned char *);
170 /************************************************************
172 ************************************************************/
174 struct evp_schedule {
180 static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
183 krb5_DES_random_key(krb5_context context,
186 DES_cblock *k = key->keyvalue.data;
188 krb5_generate_random_block(k, sizeof(DES_cblock));
189 DES_set_odd_parity(k);
190 } while(DES_is_weak_key(k));
195 krb5_DES_schedule_old(krb5_context context,
197 struct key_data *key)
199 DES_set_key_unchecked(key->key->keyvalue.data, key->schedule->data);
201 #endif /* WEAK_ENCTYPES */
204 #ifdef ENABLE_AFS_STRING_TO_KEY
206 /* This defines the Andrew string_to_key function. It accepts a password
207 * string as input and converts it via a one-way encryption algorithm to a DES
208 * encryption key. It is compatible with the original Andrew authentication
209 * service password database.
213 * Short passwords, i.e 8 characters or less.
216 krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
220 char password[8+1]; /* crypt is limited to 8 chars anyway */
223 for(i = 0; i < 8; i++) {
224 char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
226 tolower(((unsigned char*)cell.data)[i]) : 0);
227 password[i] = c ? c : 'X';
231 memcpy(key, crypt(password, "p1") + 2, sizeof(DES_cblock));
233 /* parity is inserted into the LSB so left shift each byte up one
234 bit. This allows ascii characters with a zero MSB to retain as
235 much significance as possible. */
236 for (i = 0; i < sizeof(DES_cblock); i++)
237 ((unsigned char*)key)[i] <<= 1;
238 DES_set_odd_parity (key);
242 * Long passwords, i.e 9 characters or more.
245 krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
249 DES_key_schedule schedule;
255 memcpy(password, pw.data, min(pw.length, sizeof(password)));
256 if(pw.length < sizeof(password)) {
257 int len = min(cell.length, sizeof(password) - pw.length);
260 memcpy(password + pw.length, cell.data, len);
261 for (i = pw.length; i < pw.length + len; ++i)
262 password[i] = tolower((unsigned char)password[i]);
264 passlen = min(sizeof(password), pw.length + cell.length);
265 memcpy(&ivec, "kerberos", 8);
266 memcpy(&temp_key, "kerberos", 8);
267 DES_set_odd_parity (&temp_key);
268 DES_set_key_unchecked (&temp_key, &schedule);
269 DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
271 memcpy(&temp_key, &ivec, 8);
272 DES_set_odd_parity (&temp_key);
273 DES_set_key_unchecked (&temp_key, &schedule);
274 DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
275 memset(&schedule, 0, sizeof(schedule));
276 memset(&temp_key, 0, sizeof(temp_key));
277 memset(&ivec, 0, sizeof(ivec));
278 memset(password, 0, sizeof(password));
280 DES_set_odd_parity (key);
283 static krb5_error_code
284 DES_AFS3_string_to_key(krb5_context context,
285 krb5_enctype enctype,
292 if(password.length > 8)
293 krb5_DES_AFS3_Transarc_string_to_key(password, salt.saltvalue, &tmp);
295 krb5_DES_AFS3_CMU_string_to_key(password, salt.saltvalue, &tmp);
296 key->keytype = enctype;
297 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
298 memset(&key, 0, sizeof(key));
301 #endif /* ENABLE_AFS_STRING_TO_KEY */
304 DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
306 DES_key_schedule schedule;
311 unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
312 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
315 p = (unsigned char*)key;
316 for (i = 0; i < length; i++) {
317 unsigned char tmp = data[i];
321 *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
325 DES_set_odd_parity(key);
326 if(DES_is_weak_key(key))
328 DES_set_key_unchecked(key, &schedule);
329 DES_cbc_cksum((void*)data, key, length, &schedule, key);
330 memset(&schedule, 0, sizeof(schedule));
331 DES_set_odd_parity(key);
332 if(DES_is_weak_key(key))
336 static krb5_error_code
337 krb5_DES_string_to_key(krb5_context context,
338 krb5_enctype enctype,
348 #ifdef ENABLE_AFS_STRING_TO_KEY
349 if (opaque.length == 1) {
351 _krb5_get_int(opaque.data, &v, 1);
353 return DES_AFS3_string_to_key(context, enctype, password,
358 len = password.length + salt.saltvalue.length;
360 if(len > 0 && s == NULL) {
361 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
364 memcpy(s, password.data, password.length);
365 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
366 DES_string_to_key_int(s, len, &tmp);
367 key->keytype = enctype;
368 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
369 memset(&tmp, 0, sizeof(tmp));
376 krb5_DES_random_to_key(krb5_context context,
381 DES_cblock *k = key->keyvalue.data;
382 memcpy(k, data, key->keyvalue.length);
383 DES_set_odd_parity(k);
384 if(DES_is_weak_key(k))
385 xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
393 DES3_random_key(krb5_context context,
396 DES_cblock *k = key->keyvalue.data;
398 krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
399 DES_set_odd_parity(&k[0]);
400 DES_set_odd_parity(&k[1]);
401 DES_set_odd_parity(&k[2]);
402 } while(DES_is_weak_key(&k[0]) ||
403 DES_is_weak_key(&k[1]) ||
404 DES_is_weak_key(&k[2]));
408 * A = A xor B. A & B are 8 bytes.
412 xor (DES_cblock *key, const unsigned char *b)
414 unsigned char *a = (unsigned char*)key;
425 #ifdef DES3_OLD_ENCTYPE
426 static krb5_error_code
427 DES3_string_to_key(krb5_context context,
428 krb5_enctype enctype,
436 unsigned char tmp[24];
440 len = password.length + salt.saltvalue.length;
442 if(len != 0 && str == NULL) {
443 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
446 memcpy(str, password.data, password.length);
447 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
450 DES_key_schedule s[3];
453 ret = _krb5_n_fold(str, len, tmp, 24);
457 krb5_set_error_message (context, ret, "malloc: out of memory");
461 for(i = 0; i < 3; i++){
462 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
463 DES_set_odd_parity(keys + i);
464 if(DES_is_weak_key(keys + i))
465 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
466 DES_set_key_unchecked(keys + i, &s[i]);
468 memset(&ivec, 0, sizeof(ivec));
469 DES_ede3_cbc_encrypt(tmp,
471 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
472 memset(s, 0, sizeof(s));
473 memset(&ivec, 0, sizeof(ivec));
474 for(i = 0; i < 3; i++){
475 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
476 DES_set_odd_parity(keys + i);
477 if(DES_is_weak_key(keys + i))
478 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
480 memset(tmp, 0, sizeof(tmp));
482 key->keytype = enctype;
483 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
484 memset(keys, 0, sizeof(keys));
491 static krb5_error_code
492 DES3_string_to_key_derived(krb5_context context,
493 krb5_enctype enctype,
500 size_t len = password.length + salt.saltvalue.length;
504 if(len != 0 && s == NULL) {
505 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
508 memcpy(s, password.data, password.length);
509 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
510 ret = krb5_string_to_key_derived(context,
521 DES3_random_to_key(krb5_context context,
526 unsigned char *x = key->keyvalue.data;
527 const u_char *q = data;
531 memset(x, 0, sizeof(x));
532 for (i = 0; i < 3; ++i) {
534 for (j = 0; j < 7; ++j) {
535 unsigned char b = q[7 * i + j];
540 for (j = 6; j >= 0; --j) {
541 foo |= q[7 * i + j] & 1;
546 k = key->keyvalue.data;
547 for (i = 0; i < 3; i++) {
548 DES_set_odd_parity(&k[i]);
549 if(DES_is_weak_key(&k[i]))
550 xor(&k[i], (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
559 ARCFOUR_schedule(krb5_context context,
563 RC4_set_key (kd->schedule->data,
564 kd->key->keyvalue.length, kd->key->keyvalue.data);
567 static krb5_error_code
568 ARCFOUR_string_to_key(krb5_context context,
569 krb5_enctype enctype,
580 m = EVP_MD_CTX_create();
583 krb5_set_error_message(context, ret, "Malloc: out of memory");
587 EVP_DigestInit_ex(m, EVP_md4(), NULL);
589 ret = wind_utf8ucs2_length(password.data, &len);
591 krb5_set_error_message (context, ret, "Password not an UCS2 string");
595 s = malloc (len * sizeof(s[0]));
596 if (len != 0 && s == NULL) {
597 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
602 ret = wind_utf8ucs2(password.data, s, &len);
604 krb5_set_error_message (context, ret, "Password not an UCS2 string");
609 for (i = 0; i < len; i++) {
612 EVP_DigestUpdate (m, &p, 1);
613 p = (s[i] >> 8) & 0xff;
614 EVP_DigestUpdate (m, &p, 1);
617 key->keytype = enctype;
618 ret = krb5_data_alloc (&key->keyvalue, 16);
620 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
623 EVP_DigestFinal_ex (m, key->keyvalue.data, NULL);
626 EVP_MD_CTX_destroy(m);
637 int _krb5_AES_string_to_default_iterator = 4096;
639 static krb5_error_code
640 AES_string_to_key(krb5_context context,
641 krb5_enctype enctype,
649 struct encryption_type *et;
652 if (opaque.length == 0)
653 iter = _krb5_AES_string_to_default_iterator;
654 else if (opaque.length == 4) {
656 _krb5_get_int(opaque.data, &v, 4);
657 iter = ((uint32_t)v);
659 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
661 et = _find_enctype(enctype);
663 return KRB5_PROG_KEYTYPE_NOSUPP;
668 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
671 kd.key->keytype = enctype;
672 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
674 krb5_set_error_message (context, ret, "malloc: out of memory");
678 ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
679 salt.saltvalue.data, salt.saltvalue.length,
681 et->keytype->size, kd.key->keyvalue.data);
683 free_key_data(context, &kd, et);
684 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
685 "Error calculating s2k");
686 return KRB5_PROG_KEYTYPE_NOSUPP;
689 ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
691 ret = krb5_copy_keyblock_contents(context, kd.key, key);
692 free_key_data(context, &kd, et);
698 evp_schedule(krb5_context context, struct key_type *kt, struct key_data *kd)
700 struct evp_schedule *key = kd->schedule->data;
701 const EVP_CIPHER *c = (*kt->evp)();
703 EVP_CIPHER_CTX_init(&key->ectx);
704 EVP_CIPHER_CTX_init(&key->dctx);
706 EVP_CipherInit_ex(&key->ectx, c, NULL, kd->key->keyvalue.data, NULL, 1);
707 EVP_CipherInit_ex(&key->dctx, c, NULL, kd->key->keyvalue.data, NULL, 0);
711 evp_cleanup(krb5_context context, struct key_data *kd)
713 struct evp_schedule *key = kd->schedule->data;
714 EVP_CIPHER_CTX_cleanup(&key->ectx);
715 EVP_CIPHER_CTX_cleanup(&key->dctx);
722 static struct salt_type des_salt[] = {
726 krb5_DES_string_to_key
728 #ifdef ENABLE_AFS_STRING_TO_KEY
732 DES_AFS3_string_to_key
738 #ifdef DES3_OLD_ENCTYPE
739 static struct salt_type des3_salt[] = {
749 static struct salt_type des3_salt_derived[] = {
753 DES3_string_to_key_derived
758 static struct salt_type AES_salt[] = {
767 static struct salt_type arcfour_salt[] = {
771 ARCFOUR_string_to_key
780 static struct key_type keytype_null = {
792 static struct key_type keytype_des_old = {
797 sizeof(DES_key_schedule),
799 krb5_DES_schedule_old,
801 krb5_DES_random_to_key
803 #endif /* WEAK_ENCTYPES */
805 static struct key_type keytype_des = {
810 sizeof(struct evp_schedule),
814 krb5_DES_random_to_key,
819 #ifdef DES3_OLD_ENCTYPE
820 static struct key_type keytype_des3 = {
825 sizeof(struct evp_schedule),
835 static struct key_type keytype_des3_derived = {
840 sizeof(struct evp_schedule),
849 static struct key_type keytype_aes128 = {
854 sizeof(struct evp_schedule),
860 EVP_hcrypto_aes_128_cts
863 static struct key_type keytype_aes256 = {
868 sizeof(struct evp_schedule),
874 EVP_hcrypto_aes_256_cts
877 static struct key_type keytype_arcfour = {
888 static struct key_type *keytypes[] = {
891 &keytype_des3_derived,
892 #ifdef DES3_OLD_ENCTYPE
900 static int num_keytypes = sizeof(keytypes) / sizeof(keytypes[0]);
902 static struct key_type *
903 _find_keytype(krb5_keytype type)
906 for(i = 0; i < num_keytypes; i++)
907 if(keytypes[i]->type == type)
913 krb5_error_code KRB5_LIB_FUNCTION
914 krb5_salttype_to_string (krb5_context context,
919 struct encryption_type *e;
920 struct salt_type *st;
922 e = _find_enctype (etype);
924 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
925 "encryption type %d not supported",
927 return KRB5_PROG_ETYPE_NOSUPP;
929 for (st = e->keytype->string_to_key; st && st->type; st++) {
930 if (st->type == stype) {
931 *string = strdup (st->name);
932 if (*string == NULL) {
933 krb5_set_error_message (context, ENOMEM,
934 "malloc: out of memory");
940 krb5_set_error_message (context, HEIM_ERR_SALTTYPE_NOSUPP,
941 "salttype %d not supported", stype);
942 return HEIM_ERR_SALTTYPE_NOSUPP;
945 krb5_error_code KRB5_LIB_FUNCTION
946 krb5_string_to_salttype (krb5_context context,
949 krb5_salttype *salttype)
951 struct encryption_type *e;
952 struct salt_type *st;
954 e = _find_enctype (etype);
956 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
957 "encryption type %d not supported",
959 return KRB5_PROG_ETYPE_NOSUPP;
961 for (st = e->keytype->string_to_key; st && st->type; st++) {
962 if (strcasecmp (st->name, string) == 0) {
963 *salttype = st->type;
967 krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
968 "salttype %s not supported", string);
969 return HEIM_ERR_SALTTYPE_NOSUPP;
972 krb5_error_code KRB5_LIB_FUNCTION
973 krb5_get_pw_salt(krb5_context context,
974 krb5_const_principal principal,
982 salt->salttype = KRB5_PW_SALT;
983 len = strlen(principal->realm);
984 for (i = 0; i < principal->name.name_string.len; ++i)
985 len += strlen(principal->name.name_string.val[i]);
986 ret = krb5_data_alloc (&salt->saltvalue, len);
989 p = salt->saltvalue.data;
990 memcpy (p, principal->realm, strlen(principal->realm));
991 p += strlen(principal->realm);
992 for (i = 0; i < principal->name.name_string.len; ++i) {
994 principal->name.name_string.val[i],
995 strlen(principal->name.name_string.val[i]));
996 p += strlen(principal->name.name_string.val[i]);
1001 krb5_error_code KRB5_LIB_FUNCTION
1002 krb5_free_salt(krb5_context context,
1005 krb5_data_free(&salt.saltvalue);
1009 krb5_error_code KRB5_LIB_FUNCTION
1010 krb5_string_to_key_data (krb5_context context,
1011 krb5_enctype enctype,
1013 krb5_principal principal,
1016 krb5_error_code ret;
1019 ret = krb5_get_pw_salt(context, principal, &salt);
1022 ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
1023 krb5_free_salt(context, salt);
1027 krb5_error_code KRB5_LIB_FUNCTION
1028 krb5_string_to_key (krb5_context context,
1029 krb5_enctype enctype,
1030 const char *password,
1031 krb5_principal principal,
1035 pw.data = rk_UNCONST(password);
1036 pw.length = strlen(password);
1037 return krb5_string_to_key_data(context, enctype, pw, principal, key);
1040 krb5_error_code KRB5_LIB_FUNCTION
1041 krb5_string_to_key_data_salt (krb5_context context,
1042 krb5_enctype enctype,
1048 krb5_data_zero(&opaque);
1049 return krb5_string_to_key_data_salt_opaque(context, enctype, password,
1054 * Do a string -> key for encryption type `enctype' operation on
1055 * `password' (with salt `salt' and the enctype specific data string
1056 * `opaque'), returning the resulting key in `key'
1059 krb5_error_code KRB5_LIB_FUNCTION
1060 krb5_string_to_key_data_salt_opaque (krb5_context context,
1061 krb5_enctype enctype,
1067 struct encryption_type *et =_find_enctype(enctype);
1068 struct salt_type *st;
1070 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1071 "encryption type %d not supported",
1073 return KRB5_PROG_ETYPE_NOSUPP;
1075 for(st = et->keytype->string_to_key; st && st->type; st++)
1076 if(st->type == salt.salttype)
1077 return (*st->string_to_key)(context, enctype, password,
1079 krb5_set_error_message(context, HEIM_ERR_SALTTYPE_NOSUPP,
1080 "salt type %d not supported",
1082 return HEIM_ERR_SALTTYPE_NOSUPP;
1086 * Do a string -> key for encryption type `enctype' operation on the
1087 * string `password' (with salt `salt'), returning the resulting key
1091 krb5_error_code KRB5_LIB_FUNCTION
1092 krb5_string_to_key_salt (krb5_context context,
1093 krb5_enctype enctype,
1094 const char *password,
1099 pw.data = rk_UNCONST(password);
1100 pw.length = strlen(password);
1101 return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
1104 krb5_error_code KRB5_LIB_FUNCTION
1105 krb5_string_to_key_salt_opaque (krb5_context context,
1106 krb5_enctype enctype,
1107 const char *password,
1113 pw.data = rk_UNCONST(password);
1114 pw.length = strlen(password);
1115 return krb5_string_to_key_data_salt_opaque(context, enctype,
1116 pw, salt, opaque, key);
1119 krb5_error_code KRB5_LIB_FUNCTION
1120 krb5_enctype_keysize(krb5_context context,
1124 struct encryption_type *et = _find_enctype(type);
1126 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1127 "encryption type %d not supported",
1129 return KRB5_PROG_ETYPE_NOSUPP;
1131 *keysize = et->keytype->size;
1135 krb5_error_code KRB5_LIB_FUNCTION
1136 krb5_enctype_keybits(krb5_context context,
1140 struct encryption_type *et = _find_enctype(type);
1142 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1143 "encryption type %d not supported",
1145 return KRB5_PROG_ETYPE_NOSUPP;
1147 *keybits = et->keytype->bits;
1151 krb5_error_code KRB5_LIB_FUNCTION
1152 krb5_generate_random_keyblock(krb5_context context,
1156 krb5_error_code ret;
1157 struct encryption_type *et = _find_enctype(type);
1159 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
1160 "encryption type %d not supported",
1162 return KRB5_PROG_ETYPE_NOSUPP;
1164 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
1167 key->keytype = type;
1168 if(et->keytype->random_key)
1169 (*et->keytype->random_key)(context, key);
1171 krb5_generate_random_block(key->keyvalue.data,
1172 key->keyvalue.length);
1176 static krb5_error_code
1177 _key_schedule(krb5_context context,
1178 struct key_data *key)
1180 krb5_error_code ret;
1181 struct encryption_type *et = _find_enctype(key->key->keytype);
1182 struct key_type *kt = et->keytype;
1184 if(kt->schedule == NULL)
1186 if (key->schedule != NULL)
1188 ALLOC(key->schedule, 1);
1189 if(key->schedule == NULL) {
1190 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
1193 ret = krb5_data_alloc(key->schedule, kt->schedule_size);
1195 free(key->schedule);
1196 key->schedule = NULL;
1199 (*kt->schedule)(context, kt, key);
1203 /************************************************************
1205 ************************************************************/
1207 static krb5_error_code
1208 NONE_checksum(krb5_context context,
1209 struct key_data *key,
1218 static krb5_error_code
1219 CRC32_checksum(krb5_context context,
1220 struct key_data *key,
1227 unsigned char *r = C->checksum.data;
1228 _krb5_crc_init_table ();
1229 crc = _krb5_crc_update (data, len, 0);
1231 r[1] = (crc >> 8) & 0xff;
1232 r[2] = (crc >> 16) & 0xff;
1233 r[3] = (crc >> 24) & 0xff;
1237 static krb5_error_code
1238 RSA_MD4_checksum(krb5_context context,
1239 struct key_data *key,
1245 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md4(), NULL) != 1)
1246 krb5_abortx(context, "md4 checksum failed");
1250 static krb5_error_code
1251 des_checksum(krb5_context context,
1252 const EVP_MD *evp_md,
1253 struct key_data *key,
1258 struct evp_schedule *ctx = key->schedule->data;
1261 unsigned char *p = cksum->checksum.data;
1263 krb5_generate_random_block(p, 8);
1265 m = EVP_MD_CTX_create();
1267 krb5_set_error_message(context, ENOMEM, "Malloc: out of memory");
1271 EVP_DigestInit_ex(m, evp_md, NULL);
1272 EVP_DigestUpdate(m, p, 8);
1273 EVP_DigestUpdate(m, data, len);
1274 EVP_DigestFinal_ex (m, p + 8, NULL);
1275 EVP_MD_CTX_destroy(m);
1276 memset (&ivec, 0, sizeof(ivec));
1277 EVP_CipherInit_ex(&ctx->ectx, NULL, NULL, NULL, (void *)&ivec, -1);
1278 EVP_Cipher(&ctx->ectx, p, p, 24);
1283 static krb5_error_code
1284 des_verify(krb5_context context,
1285 const EVP_MD *evp_md,
1286 struct key_data *key,
1291 struct evp_schedule *ctx = key->schedule->data;
1293 unsigned char tmp[24];
1294 unsigned char res[16];
1296 krb5_error_code ret = 0;
1298 m = EVP_MD_CTX_create();
1300 krb5_set_error_message(context, ENOMEM, "Malloc: out of memory");
1304 memset(&ivec, 0, sizeof(ivec));
1305 EVP_CipherInit_ex(&ctx->dctx, NULL, NULL, NULL, (void *)&ivec, -1);
1306 EVP_Cipher(&ctx->dctx, tmp, C->checksum.data, 24);
1308 EVP_DigestInit_ex(m, evp_md, NULL);
1309 EVP_DigestUpdate(m, tmp, 8); /* confounder */
1310 EVP_DigestUpdate(m, data, len);
1311 EVP_DigestFinal_ex (m, res, NULL);
1312 EVP_MD_CTX_destroy(m);
1313 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1314 krb5_clear_error_string (context);
1315 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1317 memset(tmp, 0, sizeof(tmp));
1318 memset(res, 0, sizeof(res));
1322 static krb5_error_code
1323 RSA_MD4_DES_checksum(krb5_context context,
1324 struct key_data *key,
1330 return des_checksum(context, EVP_md4(), key, data, len, cksum);
1333 static krb5_error_code
1334 RSA_MD4_DES_verify(krb5_context context,
1335 struct key_data *key,
1341 return des_verify(context, EVP_md5(), key, data, len, C);
1344 static krb5_error_code
1345 RSA_MD5_checksum(krb5_context context,
1346 struct key_data *key,
1352 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_md5(), NULL) != 1)
1353 krb5_abortx(context, "md5 checksum failed");
1357 static krb5_error_code
1358 RSA_MD5_DES_checksum(krb5_context context,
1359 struct key_data *key,
1365 return des_checksum(context, EVP_md5(), key, data, len, C);
1368 static krb5_error_code
1369 RSA_MD5_DES_verify(krb5_context context,
1370 struct key_data *key,
1376 return des_verify(context, EVP_md5(), key, data, len, C);
1379 static krb5_error_code
1380 RSA_MD5_DES3_checksum(krb5_context context,
1381 struct key_data *key,
1387 return des_checksum(context, EVP_md5(), key, data, len, C);
1390 static krb5_error_code
1391 RSA_MD5_DES3_verify(krb5_context context,
1392 struct key_data *key,
1398 return des_verify(context, EVP_md5(), key, data, len, C);
1401 static krb5_error_code
1402 SHA1_checksum(krb5_context context,
1403 struct key_data *key,
1409 if (EVP_Digest(data, len, C->checksum.data, NULL, EVP_sha1(), NULL) != 1)
1410 krb5_abortx(context, "sha1 checksum failed");
1414 /* HMAC according to RFC2104 */
1415 static krb5_error_code
1416 hmac(krb5_context context,
1417 struct checksum_type *cm,
1421 struct key_data *keyblock,
1424 unsigned char *ipad, *opad;
1429 ipad = malloc(cm->blocksize + len);
1432 opad = malloc(cm->blocksize + cm->checksumsize);
1437 memset(ipad, 0x36, cm->blocksize);
1438 memset(opad, 0x5c, cm->blocksize);
1440 if(keyblock->key->keyvalue.length > cm->blocksize){
1441 (*cm->checksum)(context,
1443 keyblock->key->keyvalue.data,
1444 keyblock->key->keyvalue.length,
1447 key = result->checksum.data;
1448 key_len = result->checksum.length;
1450 key = keyblock->key->keyvalue.data;
1451 key_len = keyblock->key->keyvalue.length;
1453 for(i = 0; i < key_len; i++){
1457 memcpy(ipad + cm->blocksize, data, len);
1458 (*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
1460 memcpy(opad + cm->blocksize, result->checksum.data,
1461 result->checksum.length);
1462 (*cm->checksum)(context, keyblock, opad,
1463 cm->blocksize + cm->checksumsize, usage, result);
1464 memset(ipad, 0, cm->blocksize + len);
1466 memset(opad, 0, cm->blocksize + cm->checksumsize);
1472 krb5_error_code KRB5_LIB_FUNCTION
1473 krb5_hmac(krb5_context context,
1474 krb5_cksumtype cktype,
1481 struct checksum_type *c = _find_checksum(cktype);
1483 krb5_error_code ret;
1486 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1487 "checksum type %d not supported",
1489 return KRB5_PROG_SUMTYPE_NOSUPP;
1495 ret = hmac(context, c, data, len, usage, &kd, result);
1498 krb5_free_data(context, kd.schedule);
1503 static krb5_error_code
1504 SP_HMAC_SHA1_checksum(krb5_context context,
1505 struct key_data *key,
1511 struct checksum_type *c = _find_checksum(CKSUMTYPE_SHA1);
1514 krb5_error_code ret;
1516 res.checksum.data = sha1_data;
1517 res.checksum.length = sizeof(sha1_data);
1519 ret = hmac(context, c, data, len, usage, key, &res);
1521 krb5_abortx(context, "hmac failed");
1522 memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
1527 * checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
1530 static krb5_error_code
1531 HMAC_MD5_checksum(krb5_context context,
1532 struct key_data *key,
1539 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1540 const char signature[] = "signaturekey";
1542 struct key_data ksign;
1545 unsigned char tmp[16];
1546 unsigned char ksign_c_data[16];
1547 krb5_error_code ret;
1549 m = EVP_MD_CTX_create();
1551 krb5_set_error_message(context, ENOMEM, "Malloc: out of memory");
1554 ksign_c.checksum.length = sizeof(ksign_c_data);
1555 ksign_c.checksum.data = ksign_c_data;
1556 ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
1558 EVP_MD_CTX_destroy(m);
1562 kb.keyvalue = ksign_c.checksum;
1563 EVP_DigestInit_ex(m, EVP_md5(), NULL);
1564 t[0] = (usage >> 0) & 0xFF;
1565 t[1] = (usage >> 8) & 0xFF;
1566 t[2] = (usage >> 16) & 0xFF;
1567 t[3] = (usage >> 24) & 0xFF;
1568 EVP_DigestUpdate(m, t, 4);
1569 EVP_DigestUpdate(m, data, len);
1570 EVP_DigestFinal_ex (m, tmp, NULL);
1571 EVP_MD_CTX_destroy(m);
1573 ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
1579 static struct checksum_type checksum_none = {
1588 static struct checksum_type checksum_crc32 = {
1597 static struct checksum_type checksum_rsa_md4 = {
1606 static struct checksum_type checksum_rsa_md4_des = {
1607 CKSUMTYPE_RSA_MD4_DES,
1611 F_KEYED | F_CPROOF | F_VARIANT,
1612 RSA_MD4_DES_checksum,
1615 static struct checksum_type checksum_rsa_md5 = {
1624 static struct checksum_type checksum_rsa_md5_des = {
1625 CKSUMTYPE_RSA_MD5_DES,
1629 F_KEYED | F_CPROOF | F_VARIANT,
1630 RSA_MD5_DES_checksum,
1633 #ifdef DES3_OLD_ENCTYPE
1634 static struct checksum_type checksum_rsa_md5_des3 = {
1635 CKSUMTYPE_RSA_MD5_DES3,
1639 F_KEYED | F_CPROOF | F_VARIANT,
1640 RSA_MD5_DES3_checksum,
1644 static struct checksum_type checksum_sha1 = {
1653 static struct checksum_type checksum_hmac_sha1_des3 = {
1654 CKSUMTYPE_HMAC_SHA1_DES3,
1658 F_KEYED | F_CPROOF | F_DERIVED,
1659 SP_HMAC_SHA1_checksum,
1663 static struct checksum_type checksum_hmac_sha1_aes128 = {
1664 CKSUMTYPE_HMAC_SHA1_96_AES_128,
1665 "hmac-sha1-96-aes128",
1668 F_KEYED | F_CPROOF | F_DERIVED,
1669 SP_HMAC_SHA1_checksum,
1673 static struct checksum_type checksum_hmac_sha1_aes256 = {
1674 CKSUMTYPE_HMAC_SHA1_96_AES_256,
1675 "hmac-sha1-96-aes256",
1678 F_KEYED | F_CPROOF | F_DERIVED,
1679 SP_HMAC_SHA1_checksum,
1683 static struct checksum_type checksum_hmac_md5 = {
1693 static struct checksum_type *checksum_types[] = {
1697 &checksum_rsa_md4_des,
1699 &checksum_rsa_md5_des,
1700 #ifdef DES3_OLD_ENCTYPE
1701 &checksum_rsa_md5_des3,
1704 &checksum_hmac_sha1_des3,
1705 &checksum_hmac_sha1_aes128,
1706 &checksum_hmac_sha1_aes256,
1710 static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
1712 static struct checksum_type *
1713 _find_checksum(krb5_cksumtype type)
1716 for(i = 0; i < num_checksums; i++)
1717 if(checksum_types[i]->type == type)
1718 return checksum_types[i];
1722 static krb5_error_code
1723 get_checksum_key(krb5_context context,
1725 unsigned usage, /* not krb5_key_usage */
1726 struct checksum_type *ct,
1727 struct key_data **key)
1729 krb5_error_code ret = 0;
1731 if(ct->flags & F_DERIVED)
1732 ret = _get_derived_key(context, crypto, usage, key);
1733 else if(ct->flags & F_VARIANT) {
1736 *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
1738 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
1741 ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
1744 for(i = 0; i < (*key)->key->keyvalue.length; i++)
1745 ((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
1747 *key = &crypto->key;
1750 ret = _key_schedule(context, *key);
1754 static krb5_error_code
1755 create_checksum (krb5_context context,
1756 struct checksum_type *ct,
1763 krb5_error_code ret;
1764 struct key_data *dkey;
1767 if (ct->flags & F_DISABLED) {
1768 krb5_clear_error_string (context);
1769 return KRB5_PROG_SUMTYPE_NOSUPP;
1771 keyed_checksum = (ct->flags & F_KEYED) != 0;
1772 if(keyed_checksum && crypto == NULL) {
1773 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1774 "Checksum type %s is keyed "
1775 "but no crypto context (key) was passed in",
1777 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1779 if(keyed_checksum) {
1780 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1785 result->cksumtype = ct->type;
1786 ret = krb5_data_alloc(&result->checksum, ct->checksumsize);
1789 return (*ct->checksum)(context, dkey, data, len, usage, result);
1793 arcfour_checksum_p(struct checksum_type *ct, krb5_crypto crypto)
1795 return (ct->type == CKSUMTYPE_HMAC_MD5) &&
1796 (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
1799 krb5_error_code KRB5_LIB_FUNCTION
1800 krb5_create_checksum(krb5_context context,
1802 krb5_key_usage usage,
1808 struct checksum_type *ct = NULL;
1811 /* type 0 -> pick from crypto */
1813 ct = _find_checksum(type);
1814 } else if (crypto) {
1815 ct = crypto->et->keyed_checksum;
1817 ct = crypto->et->checksum;
1821 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1822 "checksum type %d not supported",
1824 return KRB5_PROG_SUMTYPE_NOSUPP;
1827 if (arcfour_checksum_p(ct, crypto)) {
1829 usage2arcfour(context, &keyusage);
1831 keyusage = CHECKSUM_USAGE(usage);
1833 return create_checksum(context, ct, crypto, keyusage,
1837 static krb5_error_code
1838 verify_checksum(krb5_context context,
1840 unsigned usage, /* not krb5_key_usage */
1845 krb5_error_code ret;
1846 struct key_data *dkey;
1849 struct checksum_type *ct;
1851 ct = _find_checksum(cksum->cksumtype);
1852 if (ct == NULL || (ct->flags & F_DISABLED)) {
1853 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1854 "checksum type %d not supported",
1856 return KRB5_PROG_SUMTYPE_NOSUPP;
1858 if(ct->checksumsize != cksum->checksum.length) {
1859 krb5_clear_error_string (context);
1860 return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
1862 keyed_checksum = (ct->flags & F_KEYED) != 0;
1863 if(keyed_checksum && crypto == NULL) {
1864 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
1865 "Checksum type %s is keyed "
1866 "but no crypto context (key) was passed in",
1868 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1870 if(keyed_checksum) {
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 memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
1891 krb5_clear_error_string (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 "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 "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 "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 "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 "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 "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_string(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 #ifdef WEAK_ENCTYPES
2062 static krb5_error_code
2063 evp_des_encrypt_null_ivec(krb5_context context,
2064 struct key_data *key,
2067 krb5_boolean encryptp,
2071 struct evp_schedule *ctx = key->schedule->data;
2074 memset(&ivec, 0, sizeof(ivec));
2075 c = encryptp ? &ctx->ectx : &ctx->dctx;
2076 EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
2077 EVP_Cipher(c, data, data, len);
2081 static krb5_error_code
2082 evp_des_encrypt_key_ivec(krb5_context context,
2083 struct key_data *key,
2086 krb5_boolean encryptp,
2090 struct evp_schedule *ctx = key->schedule->data;
2093 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2094 c = encryptp ? &ctx->ectx : &ctx->dctx;
2095 EVP_CipherInit_ex(c, NULL, NULL, NULL, (void *)&ivec, -1);
2096 EVP_Cipher(c, data, data, len);
2100 static krb5_error_code
2101 DES_CFB64_encrypt_null_ivec(krb5_context context,
2102 struct key_data *key,
2105 krb5_boolean encryptp,
2111 DES_key_schedule *s = key->schedule->data;
2112 memset(&ivec, 0, sizeof(ivec));
2114 DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
2118 static krb5_error_code
2119 DES_PCBC_encrypt_key_ivec(krb5_context context,
2120 struct key_data *key,
2123 krb5_boolean encryptp,
2128 DES_key_schedule *s = key->schedule->data;
2129 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2131 DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
2137 * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
2139 * warning: not for small children
2142 static krb5_error_code
2143 ARCFOUR_subencrypt(krb5_context context,
2144 struct key_data *key,
2150 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2151 Checksum k1_c, k2_c, k3_c, cksum;
2156 unsigned char *cdata = data;
2157 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2158 krb5_error_code ret;
2160 t[0] = (usage >> 0) & 0xFF;
2161 t[1] = (usage >> 8) & 0xFF;
2162 t[2] = (usage >> 16) & 0xFF;
2163 t[3] = (usage >> 24) & 0xFF;
2165 k1_c.checksum.length = sizeof(k1_c_data);
2166 k1_c.checksum.data = k1_c_data;
2168 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2170 krb5_abortx(context, "hmac failed");
2172 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2174 k2_c.checksum.length = sizeof(k2_c_data);
2175 k2_c.checksum.data = k2_c_data;
2178 kb.keyvalue = k2_c.checksum;
2180 cksum.checksum.length = 16;
2181 cksum.checksum.data = data;
2183 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2185 krb5_abortx(context, "hmac failed");
2188 kb.keyvalue = k1_c.checksum;
2190 k3_c.checksum.length = sizeof(k3_c_data);
2191 k3_c.checksum.data = k3_c_data;
2193 ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
2195 krb5_abortx(context, "hmac failed");
2197 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2198 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2199 memset (k1_c_data, 0, sizeof(k1_c_data));
2200 memset (k2_c_data, 0, sizeof(k2_c_data));
2201 memset (k3_c_data, 0, sizeof(k3_c_data));
2205 static krb5_error_code
2206 ARCFOUR_subdecrypt(krb5_context context,
2207 struct key_data *key,
2213 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2214 Checksum k1_c, k2_c, k3_c, cksum;
2219 unsigned char *cdata = data;
2220 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2221 unsigned char cksum_data[16];
2222 krb5_error_code ret;
2224 t[0] = (usage >> 0) & 0xFF;
2225 t[1] = (usage >> 8) & 0xFF;
2226 t[2] = (usage >> 16) & 0xFF;
2227 t[3] = (usage >> 24) & 0xFF;
2229 k1_c.checksum.length = sizeof(k1_c_data);
2230 k1_c.checksum.data = k1_c_data;
2232 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2234 krb5_abortx(context, "hmac failed");
2236 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2238 k2_c.checksum.length = sizeof(k2_c_data);
2239 k2_c.checksum.data = k2_c_data;
2242 kb.keyvalue = k1_c.checksum;
2244 k3_c.checksum.length = sizeof(k3_c_data);
2245 k3_c.checksum.data = k3_c_data;
2247 ret = hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
2249 krb5_abortx(context, "hmac failed");
2251 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2252 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2255 kb.keyvalue = k2_c.checksum;
2257 cksum.checksum.length = 16;
2258 cksum.checksum.data = cksum_data;
2260 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2262 krb5_abortx(context, "hmac failed");
2264 memset (k1_c_data, 0, sizeof(k1_c_data));
2265 memset (k2_c_data, 0, sizeof(k2_c_data));
2266 memset (k3_c_data, 0, sizeof(k3_c_data));
2268 if (memcmp (cksum.checksum.data, data, 16) != 0) {
2269 krb5_clear_error_string (context);
2270 return KRB5KRB_AP_ERR_BAD_INTEGRITY;
2277 * convert the usage numbers used in
2278 * draft-ietf-cat-kerb-key-derivation-00.txt to the ones in
2279 * draft-brezak-win2k-krb-rc4-hmac-04.txt
2282 static krb5_error_code
2283 usage2arcfour (krb5_context context, unsigned *usage)
2286 case KRB5_KU_AS_REP_ENC_PART : /* 3 */
2287 case KRB5_KU_TGS_REP_ENC_PART_SUB_KEY : /* 9 */
2290 case KRB5_KU_USAGE_SEAL : /* 22 */
2293 case KRB5_KU_USAGE_SIGN : /* 23 */
2296 case KRB5_KU_USAGE_SEQ: /* 24 */
2304 static krb5_error_code
2305 ARCFOUR_encrypt(krb5_context context,
2306 struct key_data *key,
2309 krb5_boolean encryptp,
2313 krb5_error_code ret;
2314 unsigned keyusage = usage;
2316 if((ret = usage2arcfour (context, &keyusage)) != 0)
2320 return ARCFOUR_subencrypt (context, key, data, len, keyusage, ivec);
2322 return ARCFOUR_subdecrypt (context, key, data, len, keyusage, ivec);
2330 static krb5_error_code
2331 AES_PRF(krb5_context context,
2333 const krb5_data *in,
2336 struct checksum_type *ct = crypto->et->checksum;
2337 krb5_error_code ret;
2339 krb5_keyblock *derived;
2341 result.cksumtype = ct->type;
2342 ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
2344 krb5_set_error_message(context, ret, "out memory");
2348 ret = (*ct->checksum)(context, NULL, in->data, in->length, 0, &result);
2350 krb5_data_free(&result.checksum);
2354 if (result.checksum.length < crypto->et->blocksize)
2355 krb5_abortx(context, "internal prf error");
2358 ret = krb5_derive_key(context, crypto->key.key,
2359 crypto->et->type, "prf", 3, &derived);
2361 krb5_abortx(context, "krb5_derive_key");
2363 ret = krb5_data_alloc(out, crypto->et->blocksize);
2365 krb5_abortx(context, "malloc failed");
2368 const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
2370 /* XXX blksz 1 for cts, so we can't use that */
2371 EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
2372 EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
2373 EVP_Cipher(&ctx, out->data, result.checksum.data, 16);
2374 EVP_CIPHER_CTX_cleanup(&ctx);
2377 krb5_data_free(&result.checksum);
2378 krb5_free_keyblock(context, derived);
2384 * these should currently be in reverse preference order.
2385 * (only relevant for !F_PSEUDO) */
2387 static struct encryption_type enctype_null = {
2401 static struct encryption_type enctype_arcfour_hmac_md5 = {
2402 ETYPE_ARCFOUR_HMAC_MD5,
2415 #ifdef DES3_OLD_ENCTYPE
2416 static struct encryption_type enctype_des3_cbc_md5 = {
2424 &checksum_rsa_md5_des3,
2431 static struct encryption_type enctype_des3_cbc_sha1 = {
2432 ETYPE_DES3_CBC_SHA1,
2437 &keytype_des3_derived,
2439 &checksum_hmac_sha1_des3,
2445 #ifdef DES3_OLD_ENCTYPE
2446 static struct encryption_type enctype_old_des3_cbc_sha1 = {
2447 ETYPE_OLD_DES3_CBC_SHA1,
2448 "old-des3-cbc-sha1",
2454 &checksum_hmac_sha1_des3,
2461 static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
2462 ETYPE_AES128_CTS_HMAC_SHA1_96,
2463 "aes128-cts-hmac-sha1-96",
2469 &checksum_hmac_sha1_aes128,
2475 static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
2476 ETYPE_AES256_CTS_HMAC_SHA1_96,
2477 "aes256-cts-hmac-sha1-96",
2483 &checksum_hmac_sha1_aes256,
2489 static struct encryption_type enctype_des3_cbc_none = {
2490 ETYPE_DES3_CBC_NONE,
2495 &keytype_des3_derived,
2503 #ifdef WEAK_ENCTYPES
2504 static struct encryption_type enctype_des_cbc_crc = {
2514 evp_des_encrypt_key_ivec,
2518 static struct encryption_type enctype_des_cbc_md4 = {
2526 &checksum_rsa_md4_des,
2528 evp_des_encrypt_null_ivec,
2532 static struct encryption_type enctype_des_cbc_md5 = {
2540 &checksum_rsa_md5_des,
2542 evp_des_encrypt_null_ivec,
2546 static struct encryption_type enctype_des_cbc_none = {
2555 F_PSEUDO|F_DISABLED,
2556 evp_des_encrypt_null_ivec,
2560 static struct encryption_type enctype_des_cfb64_none = {
2561 ETYPE_DES_CFB64_NONE,
2569 F_PSEUDO|F_DISABLED,
2570 DES_CFB64_encrypt_null_ivec,
2574 static struct encryption_type enctype_des_pcbc_none = {
2575 ETYPE_DES_PCBC_NONE,
2583 F_PSEUDO|F_DISABLED,
2584 DES_PCBC_encrypt_key_ivec,
2588 #endif /* WEAK_ENCTYPES */
2590 static struct encryption_type *etypes[] = {
2591 &enctype_aes256_cts_hmac_sha1,
2592 &enctype_aes128_cts_hmac_sha1,
2593 &enctype_des3_cbc_sha1,
2594 &enctype_des3_cbc_none, /* used by the gss-api mech */
2595 &enctype_arcfour_hmac_md5,
2596 #ifdef DES3_OLD_ENCTYPE
2597 &enctype_des3_cbc_md5,
2598 &enctype_old_des3_cbc_sha1,
2600 #ifdef WEAK_ENCTYPES
2601 &enctype_des_cbc_crc,
2602 &enctype_des_cbc_md4,
2603 &enctype_des_cbc_md5,
2604 &enctype_des_cbc_none,
2605 &enctype_des_cfb64_none,
2606 &enctype_des_pcbc_none,
2611 static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
2614 static struct encryption_type *
2615 _find_enctype(krb5_enctype type)
2618 for(i = 0; i < num_etypes; i++)
2619 if(etypes[i]->type == type)
2625 krb5_error_code KRB5_LIB_FUNCTION
2626 krb5_enctype_to_string(krb5_context context,
2630 struct encryption_type *e;
2631 e = _find_enctype(etype);
2633 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2634 "encryption type %d not supported",
2637 return KRB5_PROG_ETYPE_NOSUPP;
2639 *string = strdup(e->name);
2640 if(*string == NULL) {
2641 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
2647 krb5_error_code KRB5_LIB_FUNCTION
2648 krb5_string_to_enctype(krb5_context context,
2650 krb5_enctype *etype)
2653 for(i = 0; i < num_etypes; i++)
2654 if(strcasecmp(etypes[i]->name, string) == 0){
2655 *etype = etypes[i]->type;
2658 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2659 "encryption type %s not supported",
2661 return KRB5_PROG_ETYPE_NOSUPP;
2664 krb5_error_code KRB5_LIB_FUNCTION
2665 krb5_enctype_to_keytype(krb5_context context,
2667 krb5_keytype *keytype)
2669 struct encryption_type *e = _find_enctype(etype);
2671 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2672 "encryption type %d not supported",
2674 return KRB5_PROG_ETYPE_NOSUPP;
2676 *keytype = e->keytype->type; /* XXX */
2680 krb5_error_code KRB5_LIB_FUNCTION
2681 krb5_enctype_valid(krb5_context context,
2684 struct encryption_type *e = _find_enctype(etype);
2686 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2687 "encryption type %d not supported",
2689 return KRB5_PROG_ETYPE_NOSUPP;
2691 if (e->flags & F_DISABLED) {
2692 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
2693 "encryption type %s is disabled",
2695 return KRB5_PROG_ETYPE_NOSUPP;
2701 * Return the coresponding encryption type for a checksum type.
2703 * @param context Kerberos context
2704 * @param ctype The checksum type to get the result enctype for
2705 * @param etype The returned encryption, when the matching etype is
2706 * not found, etype is set to ETYPE_NULL.
2708 * @return Return an error code for an failure or 0 on success.
2709 * @ingroup krb5_crypto
2713 krb5_error_code KRB5_LIB_FUNCTION
2714 krb5_cksumtype_to_enctype(krb5_context context,
2715 krb5_cksumtype ctype,
2716 krb5_enctype *etype)
2720 *etype = ETYPE_NULL;
2722 for(i = 0; i < num_etypes; i++) {
2723 if(etypes[i]->keyed_checksum &&
2724 etypes[i]->keyed_checksum->type == ctype)
2726 *etype = etypes[i]->type;
2731 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2732 "ckecksum type %d not supported",
2734 return KRB5_PROG_SUMTYPE_NOSUPP;
2738 krb5_error_code KRB5_LIB_FUNCTION
2739 krb5_cksumtype_valid(krb5_context context,
2740 krb5_cksumtype ctype)
2742 struct checksum_type *c = _find_checksum(ctype);
2744 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2745 "checksum type %d not supported",
2747 return KRB5_PROG_SUMTYPE_NOSUPP;
2749 if (c->flags & F_DISABLED) {
2750 krb5_set_error_message (context, KRB5_PROG_SUMTYPE_NOSUPP,
2751 "checksum type %s is disabled",
2753 return KRB5_PROG_SUMTYPE_NOSUPP;
2759 /* if two enctypes have compatible keys */
2760 krb5_boolean KRB5_LIB_FUNCTION
2761 krb5_enctypes_compatible_keys(krb5_context context,
2762 krb5_enctype etype1,
2763 krb5_enctype etype2)
2765 struct encryption_type *e1 = _find_enctype(etype1);
2766 struct encryption_type *e2 = _find_enctype(etype2);
2767 return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
2771 derived_crypto(krb5_context context,
2774 return (crypto->et->flags & F_DERIVED) != 0;
2778 special_crypto(krb5_context context,
2781 return (crypto->et->flags & F_SPECIAL) != 0;
2784 #define CHECKSUMSIZE(C) ((C)->checksumsize)
2785 #define CHECKSUMTYPE(C) ((C)->type)
2787 static krb5_error_code
2788 encrypt_internal_derived(krb5_context context,
2796 size_t sz, block_sz, checksum_sz, total_sz;
2798 unsigned char *p, *q;
2799 krb5_error_code ret;
2800 struct key_data *dkey;
2801 const struct encryption_type *et = crypto->et;
2803 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
2805 sz = et->confoundersize + len;
2806 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
2807 total_sz = block_sz + checksum_sz;
2808 p = calloc(1, total_sz);
2810 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
2815 krb5_generate_random_block(q, et->confoundersize); /* XXX */
2816 q += et->confoundersize;
2817 memcpy(q, data, len);
2819 ret = create_checksum(context,
2822 INTEGRITY_USAGE(usage),
2826 if(ret == 0 && cksum.checksum.length != checksum_sz) {
2827 free_Checksum (&cksum);
2828 krb5_clear_error_string (context);
2829 ret = KRB5_CRYPTO_INTERNAL;
2833 memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
2834 free_Checksum (&cksum);
2835 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
2838 ret = _key_schedule(context, dkey);
2841 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
2845 result->length = total_sz;
2848 memset(p, 0, total_sz);
2854 static krb5_error_code
2855 encrypt_internal(krb5_context context,
2862 size_t sz, block_sz, checksum_sz;
2864 unsigned char *p, *q;
2865 krb5_error_code ret;
2866 const struct encryption_type *et = crypto->et;
2868 checksum_sz = CHECKSUMSIZE(et->checksum);
2870 sz = et->confoundersize + checksum_sz + len;
2871 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
2872 p = calloc(1, block_sz);
2874 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
2879 krb5_generate_random_block(q, et->confoundersize); /* XXX */
2880 q += et->confoundersize;
2881 memset(q, 0, checksum_sz);
2883 memcpy(q, data, len);
2885 ret = create_checksum(context,
2892 if(ret == 0 && cksum.checksum.length != checksum_sz) {
2893 krb5_clear_error_string (context);
2894 free_Checksum(&cksum);
2895 ret = KRB5_CRYPTO_INTERNAL;
2899 memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
2900 free_Checksum(&cksum);
2901 ret = _key_schedule(context, &crypto->key);
2904 ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
2906 memset(p, 0, block_sz);
2911 result->length = block_sz;
2914 memset(p, 0, block_sz);
2919 static krb5_error_code
2920 encrypt_internal_special(krb5_context context,
2928 struct encryption_type *et = crypto->et;
2929 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
2930 size_t sz = len + cksum_sz + et->confoundersize;
2932 krb5_error_code ret;
2936 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
2940 memset (p, 0, cksum_sz);
2942 krb5_generate_random_block(p, et->confoundersize);
2943 p += et->confoundersize;
2944 memcpy (p, data, len);
2945 ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
2952 result->length = sz;
2956 static krb5_error_code
2957 decrypt_internal_derived(krb5_context context,
2968 krb5_error_code ret;
2969 struct key_data *dkey;
2970 struct encryption_type *et = crypto->et;
2973 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
2974 if (len < checksum_sz + et->confoundersize) {
2975 krb5_set_error_message(context, KRB5_BAD_MSIZE,
2976 "Encrypted data shorter then "
2977 "checksum + confunder");
2978 return KRB5_BAD_MSIZE;
2981 if (((len - checksum_sz) % et->padsize) != 0) {
2982 krb5_clear_error_string(context);
2983 return KRB5_BAD_MSIZE;
2987 if(len != 0 && p == NULL) {
2988 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
2991 memcpy(p, data, len);
2995 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3000 ret = _key_schedule(context, dkey);
3005 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3011 cksum.checksum.data = p + len;
3012 cksum.checksum.length = checksum_sz;
3013 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3015 ret = verify_checksum(context,
3017 INTEGRITY_USAGE(usage),
3025 l = len - et->confoundersize;
3026 memmove(p, p + et->confoundersize, l);
3027 result->data = realloc(p, l);
3028 if(result->data == NULL && l != 0) {
3030 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3037 static krb5_error_code
3038 decrypt_internal(krb5_context context,
3045 krb5_error_code ret;
3048 size_t checksum_sz, l;
3049 struct encryption_type *et = crypto->et;
3051 if ((len % et->padsize) != 0) {
3052 krb5_clear_error_string(context);
3053 return KRB5_BAD_MSIZE;
3056 checksum_sz = CHECKSUMSIZE(et->checksum);
3058 if(len != 0 && p == NULL) {
3059 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3062 memcpy(p, data, len);
3064 ret = _key_schedule(context, &crypto->key);
3069 ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
3074 ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
3079 memset(p + et->confoundersize, 0, checksum_sz);
3080 cksum.cksumtype = CHECKSUMTYPE(et->checksum);
3081 ret = verify_checksum(context, NULL, 0, p, len, &cksum);
3082 free_Checksum(&cksum);
3087 l = len - et->confoundersize - checksum_sz;
3088 memmove(p, p + et->confoundersize + checksum_sz, l);
3089 result->data = realloc(p, l);
3090 if(result->data == NULL && l != 0) {
3092 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3099 static krb5_error_code
3100 decrypt_internal_special(krb5_context context,
3108 struct encryption_type *et = crypto->et;
3109 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3110 size_t sz = len - cksum_sz - et->confoundersize;
3112 krb5_error_code ret;
3114 if ((len % et->padsize) != 0) {
3115 krb5_clear_error_string(context);
3116 return KRB5_BAD_MSIZE;
3121 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3124 memcpy(p, data, len);
3126 ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
3132 memmove (p, p + cksum_sz + et->confoundersize, sz);
3133 result->data = realloc(p, sz);
3134 if(result->data == NULL && sz != 0) {
3136 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3139 result->length = sz;
3144 * Inline encrypt a kerberos message
3146 * @param context Kerberos context
3147 * @param crypto Kerberos crypto context
3148 * @param usage Key usage for this buffer
3149 * @param data array of buffers to process
3150 * @param num_data length of array
3151 * @param ivec initial cbc/cts vector
3153 * @return Return an error code or 0.
3154 * @ingroup krb5_crypto
3156 * Kerberos encrypted data look like this:
3158 * 1. KRB5_CRYPTO_TYPE_HEADER
3159 * 2. array KRB5_CRYPTO_TYPE_DATA and KRB5_CRYPTO_TYPE_SIGN_ONLY in
3160 * any order, however the receiver have to aware of the
3161 * order. KRB5_CRYPTO_TYPE_SIGN_ONLY is commonly used headers and
3163 * 3. KRB5_CRYPTO_TYPE_TRAILER
3166 static krb5_crypto_iov *
3167 find_iv(krb5_crypto_iov *data, int num_data, int type)
3170 for (i = 0; i < num_data; i++)
3171 if (data[i].flags == type)
3176 krb5_error_code KRB5_LIB_FUNCTION
3177 krb5_encrypt_iov_ivec(krb5_context context,
3180 krb5_crypto_iov *data,
3184 size_t headersz, trailersz, len;
3185 size_t i, sz, block_sz, pad_sz;
3187 unsigned char *p, *q;
3188 krb5_error_code ret;
3189 struct key_data *dkey;
3190 const struct encryption_type *et = crypto->et;
3191 krb5_crypto_iov *tiv, *piv, *hiv;
3193 if(!derived_crypto(context, crypto)) {
3194 krb5_clear_error_string(context);
3195 return KRB5_CRYPTO_INTERNAL;
3198 headersz = et->confoundersize;
3199 trailersz = CHECKSUMSIZE(et->keyed_checksum);
3201 for (len = 0, i = 0; i < num_data; i++) {
3202 if (data[i].flags != KRB5_CRYPTO_TYPE_HEADER &&
3203 data[i].flags == KRB5_CRYPTO_TYPE_DATA) {
3204 len += data[i].data.length;
3208 sz = headersz + len;
3209 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3211 pad_sz = block_sz - sz;
3212 trailersz += pad_sz;
3216 hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
3217 if (hiv == NULL || hiv->data.length != headersz)
3218 return KRB5_BAD_MSIZE;
3220 krb5_generate_random_block(hiv->data.data, hiv->data.length);
3224 piv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_PADDING);
3225 /* its ok to have no TYPE_PADDING if there is no padding */
3226 if (piv == NULL && pad_sz != 0)
3227 return KRB5_BAD_MSIZE;
3229 if (piv->data.length < pad_sz)
3230 return KRB5_BAD_MSIZE;
3231 piv->data.length = pad_sz;
3237 tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
3238 if (tiv == NULL || tiv->data.length != trailersz)
3239 return KRB5_BAD_MSIZE;
3243 * XXX replace with EVP_Sign? at least make create_checksum an iov
3245 * XXX CTS EVP is broken, can't handle multi buffers :(
3248 len = hiv->data.length;
3249 for (i = 0; i < num_data; i++) {
3250 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3251 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3253 len += data[i].data.length;
3256 p = q = malloc(len);
3258 memcpy(q, hiv->data.data, hiv->data.length);
3259 q += hiv->data.length;
3260 for (i = 0; i < num_data; i++) {
3261 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3262 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3264 memcpy(q, data[i].data.data, data[i].data.length);
3265 q += data[i].data.length;
3268 ret = create_checksum(context,
3271 INTEGRITY_USAGE(usage),
3276 if(ret == 0 && cksum.checksum.length != trailersz) {
3277 free_Checksum (&cksum);
3278 krb5_clear_error_string (context);
3279 ret = KRB5_CRYPTO_INTERNAL;
3284 /* save cksum at end */
3285 memcpy(tiv->data.data, cksum.checksum.data, cksum.checksum.length);
3286 free_Checksum (&cksum);
3288 /* now encrypt data */
3290 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3293 ret = _key_schedule(context, dkey);
3297 /* XXX replace with EVP_Cipher */
3299 len = hiv->data.length;
3300 for (i = 0; i < num_data; i++) {
3301 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3302 data[i].flags != KRB5_CRYPTO_TYPE_PADDING)
3304 len += data[i].data.length;
3307 p = q = malloc(len);
3311 memcpy(q, hiv->data.data, hiv->data.length);
3312 q += hiv->data.length;
3313 for (i = 0; i < num_data; i++) {
3314 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3315 data[i].flags != KRB5_CRYPTO_TYPE_PADDING)
3317 memcpy(q, data[i].data.data, data[i].data.length);
3318 q += data[i].data.length;
3321 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3326 ret = _key_schedule(context, dkey);
3332 ret = (*et->encrypt)(context, dkey, p, len, 1, usage, ivec);
3338 /* now copy data back to buffers */
3340 memcpy(hiv->data.data, q, hiv->data.length);
3341 q += hiv->data.length;
3343 for (i = 0; i < num_data; i++) {
3344 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3345 data[i].flags != KRB5_CRYPTO_TYPE_PADDING)
3347 memcpy(data[i].data.data, q, data[i].data.length);
3348 q += data[i].data.length;
3355 krb5_error_code KRB5_LIB_FUNCTION
3356 krb5_decrypt_iov_ivec(krb5_context context,
3359 krb5_crypto_iov *data,
3363 size_t headersz, trailersz, len;
3364 size_t i, sz, block_sz, pad_sz;
3366 unsigned char *p, *q;
3367 krb5_error_code ret;
3368 struct key_data *dkey;
3369 struct encryption_type *et = crypto->et;
3370 krb5_crypto_iov *tiv, *hiv;
3372 if(!derived_crypto(context, crypto)) {
3373 krb5_clear_error_string(context);
3374 return KRB5_CRYPTO_INTERNAL;
3377 headersz = et->confoundersize;
3378 trailersz = CHECKSUMSIZE(et->keyed_checksum);
3380 for (len = 0, i = 0; i < num_data; i++)
3381 if (data[i].flags == KRB5_CRYPTO_TYPE_DATA)
3382 len += data[i].data.length;
3384 sz = headersz + len;
3385 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3387 pad_sz = block_sz - sz;
3388 trailersz += pad_sz;
3392 hiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_HEADER);
3393 if (hiv == NULL || hiv->data.length < headersz)
3394 return KRB5_BAD_MSIZE;
3395 hiv->data.length = headersz;
3399 tiv = find_iv(data, num_data, KRB5_CRYPTO_TYPE_TRAILER);
3400 if (tiv == NULL || tiv->data.length < trailersz)
3401 return KRB5_BAD_MSIZE;
3402 tiv->data.length = trailersz;
3406 /* XXX replace with EVP_Cipher */
3408 for (len = 0, i = 0; i < num_data; i++) {
3409 if (data[i].flags != KRB5_CRYPTO_TYPE_HEADER &&
3410 data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3412 len += data[i].data.length;
3415 p = q = malloc(len);
3419 memcpy(q, hiv->data.data, hiv->data.length);
3420 q += hiv->data.length;
3421 for (i = 0; i < num_data; i++) {
3422 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3424 memcpy(q, data[i].data.data, data[i].data.length);
3425 q += data[i].data.length;
3428 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3433 ret = _key_schedule(context, dkey);
3439 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3445 /* XXX now copy data back to buffers */
3447 memcpy(hiv->data.data, q, hiv->data.length);
3448 q += hiv->data.length;
3449 len -= hiv->data.length;
3451 for (i = 0; i < num_data; i++) {
3452 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA)
3454 if (len < data[i].data.length)
3455 data[i].data.length = len;
3456 memcpy(data[i].data.data, q, data[i].data.length);
3457 q += data[i].data.length;
3458 len -= data[i].data.length;
3462 krb5_abortx(context, "data still in the buffer");
3464 len = hiv->data.length;
3465 for (i = 0; i < num_data; i++) {
3466 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3467 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3469 len += data[i].data.length;
3472 p = q = malloc(len);
3474 memcpy(q, hiv->data.data, hiv->data.length);
3475 q += hiv->data.length;
3476 for (i = 0; i < num_data; i++) {
3477 if (data[i].flags != KRB5_CRYPTO_TYPE_DATA &&
3478 data[i].flags != KRB5_CRYPTO_TYPE_SIGN_ONLY)
3480 memcpy(q, data[i].data.data, data[i].data.length);
3481 q += data[i].data.length;
3484 cksum.checksum.data = tiv->data.data;
3485 cksum.checksum.length = tiv->data.length;
3486 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3488 ret = verify_checksum(context,
3490 INTEGRITY_USAGE(usage),
3501 size_t KRB5_LIB_FUNCTION
3502 krb5_crypto_length(krb5_context context,
3506 if (!derived_crypto(context, crypto))
3509 case KRB5_CRYPTO_TYPE_EMPTY:
3511 case KRB5_CRYPTO_TYPE_HEADER:
3512 return crypto->et->blocksize;
3513 case KRB5_CRYPTO_TYPE_PADDING:
3514 if (crypto->et->padsize > 1)
3515 return crypto->et->padsize;
3517 case KRB5_CRYPTO_TYPE_TRAILER:
3518 return CHECKSUMSIZE(crypto->et->keyed_checksum);
3523 krb5_error_code KRB5_LIB_FUNCTION
3524 krb5_encrypt_ivec(krb5_context context,
3532 if(derived_crypto(context, crypto))
3533 return encrypt_internal_derived(context, crypto, usage,
3534 data, len, result, ivec);
3535 else if (special_crypto(context, crypto))
3536 return encrypt_internal_special (context, crypto, usage,
3537 data, len, result, ivec);
3539 return encrypt_internal(context, crypto, data, len, result, ivec);
3542 krb5_error_code KRB5_LIB_FUNCTION
3543 krb5_encrypt(krb5_context context,
3550 return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
3553 krb5_error_code KRB5_LIB_FUNCTION
3554 krb5_encrypt_EncryptedData(krb5_context context,
3560 EncryptedData *result)
3562 result->etype = CRYPTO_ETYPE(crypto);
3564 ALLOC(result->kvno, 1);
3565 *result->kvno = kvno;
3567 result->kvno = NULL;
3568 return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
3571 krb5_error_code KRB5_LIB_FUNCTION
3572 krb5_decrypt_ivec(krb5_context context,
3580 if(derived_crypto(context, crypto))
3581 return decrypt_internal_derived(context, crypto, usage,
3582 data, len, result, ivec);
3583 else if (special_crypto (context, crypto))
3584 return decrypt_internal_special(context, crypto, usage,
3585 data, len, result, ivec);
3587 return decrypt_internal(context, crypto, data, len, result, ivec);
3590 krb5_error_code KRB5_LIB_FUNCTION
3591 krb5_decrypt(krb5_context context,
3598 return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
3602 krb5_error_code KRB5_LIB_FUNCTION
3603 krb5_decrypt_EncryptedData(krb5_context context,
3606 const EncryptedData *e,
3609 return krb5_decrypt(context, crypto, usage,
3610 e->cipher.data, e->cipher.length, result);
3613 /************************************************************
3615 ************************************************************/
3617 #define ENTROPY_NEEDED 128
3620 seed_something(void)
3622 char buf[1024], seedfile[256];
3624 /* If there is a seed file, load it. But such a file cannot be trusted,
3625 so use 0 for the entropy estimate */
3626 if (RAND_file_name(seedfile, sizeof(seedfile))) {
3628 fd = open(seedfile, O_RDONLY | O_BINARY | O_CLOEXEC);
3632 ret = read(fd, buf, sizeof(buf));
3634 RAND_add(buf, ret, 0.0);
3641 /* Calling RAND_status() will try to use /dev/urandom if it exists so
3642 we do not have to deal with it. */
3643 if (RAND_status() != 1) {
3644 krb5_context context;
3648 if (!krb5_init_context(&context)) {
3649 p = krb5_config_get_string(context, NULL, "libdefaults",
3650 "egd_socket", NULL);
3652 RAND_egd_bytes(p, ENTROPY_NEEDED);
3653 krb5_free_context(context);
3657 if (RAND_status() == 1) {
3658 /* Update the seed file */
3660 RAND_write_file(seedfile);
3667 void KRB5_LIB_FUNCTION
3668 krb5_generate_random_block(void *buf, size_t len)
3670 static int rng_initialized = 0;
3672 HEIMDAL_MUTEX_lock(&crypto_mutex);
3673 if (!rng_initialized) {
3674 if (seed_something())
3675 krb5_abortx(NULL, "Fatal: could not seed the "
3676 "random number generator");
3678 rng_initialized = 1;
3680 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3681 if (RAND_bytes(buf, len) != 1)
3682 krb5_abortx(NULL, "Failed to generate random block");
3686 DES3_postproc(krb5_context context,
3687 unsigned char *k, size_t len, struct key_data *key)
3689 DES3_random_to_key(context, key->key, k, len);
3691 if (key->schedule) {
3692 krb5_free_data(context, key->schedule);
3693 key->schedule = NULL;
3697 static krb5_error_code
3698 derive_key(krb5_context context,
3699 struct encryption_type *et,
3700 struct key_data *key,
3701 const void *constant,
3705 unsigned int nblocks = 0, i;
3706 krb5_error_code ret = 0;
3707 struct key_type *kt = et->keytype;
3709 ret = _key_schedule(context, key);
3712 if(et->blocksize * 8 < kt->bits || len != et->blocksize) {
3713 nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
3714 k = malloc(nblocks * et->blocksize);
3716 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3719 ret = _krb5_n_fold(constant, len, k, et->blocksize);
3722 krb5_set_error_message(context, ret, "malloc: out of memory");
3725 for(i = 0; i < nblocks; i++) {
3727 memcpy(k + i * et->blocksize,
3728 k + (i - 1) * et->blocksize,
3730 (*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
3734 /* this case is probably broken, but won't be run anyway */
3735 void *c = malloc(len);
3736 size_t res_len = (kt->bits + 7) / 8;
3738 if(len != 0 && c == NULL) {
3739 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3742 memcpy(c, constant, len);
3743 (*et->encrypt)(context, key, c, len, 1, 0, NULL);
3744 k = malloc(res_len);
3745 if(res_len != 0 && k == NULL) {
3747 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3750 ret = _krb5_n_fold(c, len, k, res_len);
3753 krb5_set_error_message(context, ret, "malloc: out of memory");
3759 /* XXX keytype dependent post-processing */
3762 DES3_postproc(context, k, nblocks * et->blocksize, key);
3764 case KEYTYPE_AES128:
3765 case KEYTYPE_AES256:
3766 memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
3769 ret = KRB5_CRYPTO_INTERNAL;
3770 krb5_set_error_message(context, ret,
3771 "derive_key() called with unknown keytype (%u)",
3775 if (key->schedule) {
3776 krb5_free_data(context, key->schedule);
3777 key->schedule = NULL;
3779 memset(k, 0, nblocks * et->blocksize);
3784 static struct key_data *
3785 _new_derived_key(krb5_crypto crypto, unsigned usage)
3787 struct key_usage *d = crypto->key_usage;
3788 d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
3791 crypto->key_usage = d;
3792 d += crypto->num_key_usage++;
3793 memset(d, 0, sizeof(*d));
3798 krb5_error_code KRB5_LIB_FUNCTION
3799 krb5_derive_key(krb5_context context,
3800 const krb5_keyblock *key,
3802 const void *constant,
3803 size_t constant_len,
3804 krb5_keyblock **derived_key)
3806 krb5_error_code ret;
3807 struct encryption_type *et;
3810 *derived_key = NULL;
3812 et = _find_enctype (etype);
3814 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
3815 "encryption type %d not supported",
3817 return KRB5_PROG_ETYPE_NOSUPP;
3820 ret = krb5_copy_keyblock(context, key, &d.key);
3825 ret = derive_key(context, et, &d, constant, constant_len);
3827 ret = krb5_copy_keyblock(context, d.key, derived_key);
3828 free_key_data(context, &d, et);
3832 static krb5_error_code
3833 _get_derived_key(krb5_context context,
3836 struct key_data **key)
3840 unsigned char constant[5];
3842 for(i = 0; i < crypto->num_key_usage; i++)
3843 if(crypto->key_usage[i].usage == usage) {
3844 *key = &crypto->key_usage[i].key;
3847 d = _new_derived_key(crypto, usage);
3849 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3852 krb5_copy_keyblock(context, crypto->key.key, &d->key);
3853 _krb5_put_int(constant, usage, 5);
3854 derive_key(context, crypto->et, d, constant, sizeof(constant));
3860 krb5_error_code KRB5_LIB_FUNCTION
3861 krb5_crypto_init(krb5_context context,
3862 const krb5_keyblock *key,
3864 krb5_crypto *crypto)
3866 krb5_error_code ret;
3868 if(*crypto == NULL) {
3869 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
3872 if(etype == ETYPE_NULL)
3873 etype = key->keytype;
3874 (*crypto)->et = _find_enctype(etype);
3875 if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
3878 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
3879 "encryption type %d not supported",
3881 return KRB5_PROG_ETYPE_NOSUPP;
3883 if((*crypto)->et->keytype->size != key->keyvalue.length) {
3886 krb5_set_error_message (context, KRB5_BAD_KEYSIZE,
3887 "encryption key has bad length");
3888 return KRB5_BAD_KEYSIZE;
3890 ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
3896 (*crypto)->key.schedule = NULL;
3897 (*crypto)->num_key_usage = 0;
3898 (*crypto)->key_usage = NULL;
3903 free_key_data(krb5_context context, struct key_data *key,
3904 struct encryption_type *et)
3906 krb5_free_keyblock(context, key->key);
3908 if (et->keytype->cleanup)
3909 (*et->keytype->cleanup)(context, key);
3910 memset(key->schedule->data, 0, key->schedule->length);
3911 krb5_free_data(context, key->schedule);
3916 free_key_usage(krb5_context context, struct key_usage *ku,
3917 struct encryption_type *et)
3919 free_key_data(context, &ku->key, et);
3922 krb5_error_code KRB5_LIB_FUNCTION
3923 krb5_crypto_destroy(krb5_context context,
3928 for(i = 0; i < crypto->num_key_usage; i++)
3929 free_key_usage(context, &crypto->key_usage[i], crypto->et);
3930 free(crypto->key_usage);
3931 free_key_data(context, &crypto->key, crypto->et);
3936 krb5_error_code KRB5_LIB_FUNCTION
3937 krb5_crypto_getblocksize(krb5_context context,
3941 *blocksize = crypto->et->blocksize;
3945 krb5_error_code KRB5_LIB_FUNCTION
3946 krb5_crypto_getenctype(krb5_context context,
3948 krb5_enctype *enctype)
3950 *enctype = crypto->et->type;
3954 krb5_error_code KRB5_LIB_FUNCTION
3955 krb5_crypto_getpadsize(krb5_context context,
3959 *padsize = crypto->et->padsize;
3963 krb5_error_code KRB5_LIB_FUNCTION
3964 krb5_crypto_getconfoundersize(krb5_context context,
3966 size_t *confoundersize)
3968 *confoundersize = crypto->et->confoundersize;
3974 * Disable encryption type
3976 * @param context Kerberos 5 context
3977 * @param enctype encryption type to disable
3979 * @return Return an error code or 0.
3981 * @ingroup krb5_crypto
3984 krb5_error_code KRB5_LIB_FUNCTION
3985 krb5_enctype_disable(krb5_context context,
3986 krb5_enctype enctype)
3988 struct encryption_type *et = _find_enctype(enctype);
3991 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
3992 "encryption type %d not supported",
3994 return KRB5_PROG_ETYPE_NOSUPP;
3996 et->flags |= F_DISABLED;
4001 * Enable encryption type
4003 * @param context Kerberos 5 context
4004 * @param enctype encryption type to enable
4006 * @return Return an error code or 0.
4008 * @ingroup krb5_crypto
4011 krb5_error_code KRB5_LIB_FUNCTION
4012 krb5_enctype_enable(krb5_context context,
4013 krb5_enctype enctype)
4015 struct encryption_type *et = _find_enctype(enctype);
4018 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4019 "encryption type %d not supported",
4021 return KRB5_PROG_ETYPE_NOSUPP;
4023 et->flags &= ~F_DISABLED;
4028 krb5_error_code KRB5_LIB_FUNCTION
4029 krb5_string_to_key_derived(krb5_context context,
4035 struct encryption_type *et = _find_enctype(etype);
4036 krb5_error_code ret;
4042 krb5_set_error_message (context, KRB5_PROG_ETYPE_NOSUPP,
4043 "encryption type %d not supported",
4045 return KRB5_PROG_ETYPE_NOSUPP;
4047 keylen = et->keytype->bits / 8;
4050 if(kd.key == NULL) {
4051 krb5_set_error_message (context, ENOMEM,
4052 "malloc: out of memory");
4055 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
4060 kd.key->keytype = etype;
4061 tmp = malloc (keylen);
4063 krb5_free_keyblock(context, kd.key);
4064 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
4067 ret = _krb5_n_fold(str, len, tmp, keylen);
4070 krb5_set_error_message (context, ENOMEM, "malloc: out of memory");
4074 DES3_postproc (context, tmp, keylen, &kd); /* XXX */
4075 memset(tmp, 0, keylen);
4077 ret = derive_key(context,
4080 "kerberos", /* XXX well known constant */
4081 strlen("kerberos"));
4083 free_key_data(context, &kd, et);
4086 ret = krb5_copy_keyblock_contents(context, kd.key, key);
4087 free_key_data(context, &kd, et);
4092 wrapped_length (krb5_context context,
4096 struct encryption_type *et = crypto->et;
4097 size_t padsize = et->padsize;
4098 size_t checksumsize = CHECKSUMSIZE(et->checksum);
4101 res = et->confoundersize + checksumsize + data_len;
4102 res = (res + padsize - 1) / padsize * padsize;
4107 wrapped_length_dervied (krb5_context context,
4111 struct encryption_type *et = crypto->et;
4112 size_t padsize = et->padsize;
4115 res = et->confoundersize + data_len;
4116 res = (res + padsize - 1) / padsize * padsize;
4117 if (et->keyed_checksum)
4118 res += et->keyed_checksum->checksumsize;
4120 res += et->checksum->checksumsize;
4125 * Return the size of an encrypted packet of length `data_len'
4129 krb5_get_wrapped_length (krb5_context context,
4133 if (derived_crypto (context, crypto))
4134 return wrapped_length_dervied (context, crypto, data_len);
4136 return wrapped_length (context, crypto, data_len);
4140 * Return the size of an encrypted packet of length `data_len'
4144 crypto_overhead (krb5_context context,
4147 struct encryption_type *et = crypto->et;
4150 res = CHECKSUMSIZE(et->checksum);
4151 res += et->confoundersize;
4152 if (et->padsize > 1)
4158 crypto_overhead_dervied (krb5_context context,
4161 struct encryption_type *et = crypto->et;
4164 if (et->keyed_checksum)
4165 res = CHECKSUMSIZE(et->keyed_checksum);
4167 res = CHECKSUMSIZE(et->checksum);
4168 res += et->confoundersize;
4169 if (et->padsize > 1)
4175 krb5_crypto_overhead (krb5_context context, krb5_crypto crypto)
4177 if (derived_crypto (context, crypto))
4178 return crypto_overhead_dervied (context, crypto);
4180 return crypto_overhead (context, crypto);
4183 krb5_error_code KRB5_LIB_FUNCTION
4184 krb5_random_to_key(krb5_context context,
4190 krb5_error_code ret;
4191 struct encryption_type *et = _find_enctype(type);
4193 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4194 "encryption type %d not supported",
4196 return KRB5_PROG_ETYPE_NOSUPP;
4198 if ((et->keytype->bits + 7) / 8 > size) {
4199 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4200 "encryption key %s needs %d bytes "
4201 "of random to make an encryption key out of it",
4202 et->name, (int)et->keytype->size);
4203 return KRB5_PROG_ETYPE_NOSUPP;
4205 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
4208 key->keytype = type;
4209 if (et->keytype->random_to_key)
4210 (*et->keytype->random_to_key)(context, key, data, size);
4212 memcpy(key->keyvalue.data, data, et->keytype->size);
4218 _krb5_pk_octetstring2key(krb5_context context,
4222 const heim_octet_string *c_n,
4223 const heim_octet_string *k_n,
4226 struct encryption_type *et = _find_enctype(type);
4227 krb5_error_code ret;
4228 size_t keylen, offset;
4230 unsigned char counter;
4231 unsigned char shaoutput[20];
4234 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4235 "encryption type %d not supported",
4237 return KRB5_PROG_ETYPE_NOSUPP;
4239 keylen = (et->keytype->bits + 7) / 8;
4241 keydata = malloc(keylen);
4242 if (keydata == NULL) {
4243 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
4253 SHA1_Update(&m, &counter, 1);
4254 SHA1_Update(&m, dhdata, dhsize);
4256 SHA1_Update(&m, c_n->data, c_n->length);
4258 SHA1_Update(&m, k_n->data, k_n->length);
4259 SHA1_Final(shaoutput, &m);
4261 memcpy((unsigned char *)keydata + offset,
4263 min(keylen - offset, sizeof(shaoutput)));
4265 offset += sizeof(shaoutput);
4267 } while(offset < keylen);
4268 memset(shaoutput, 0, sizeof(shaoutput));
4270 ret = krb5_random_to_key(context, type, keydata, keylen, key);
4271 memset(keydata, 0, sizeof(keylen));
4276 static krb5_error_code
4277 encode_uvinfo(krb5_context context, krb5_const_principal p, krb5_data *data)
4279 KRB5PrincipalName pn;
4280 krb5_error_code ret;
4283 pn.principalName = p->name;
4284 pn.realm = p->realm;
4286 ASN1_MALLOC_ENCODE(KRB5PrincipalName, data->data, data->length,
4289 krb5_data_zero(data);
4290 krb5_set_error_message(context, ret,
4291 "Failed to encode KRB5PrincipalName");
4294 if (data->length != size)
4295 krb5_abortx(context, "asn1 compiler internal error");
4299 static krb5_error_code
4300 encode_otherinfo(krb5_context context,
4301 const AlgorithmIdentifier *ai,
4302 krb5_const_principal client,
4303 krb5_const_principal server,
4304 krb5_enctype enctype,
4305 const krb5_data *as_req,
4306 const krb5_data *pk_as_rep,
4307 const Ticket *ticket,
4310 PkinitSP80056AOtherInfo otherinfo;
4311 PkinitSuppPubInfo pubinfo;
4312 krb5_error_code ret;
4316 krb5_data_zero(other);
4317 memset(&otherinfo, 0, sizeof(otherinfo));
4318 memset(&pubinfo, 0, sizeof(pubinfo));
4320 pubinfo.enctype = enctype;
4321 pubinfo.as_REQ = *as_req;
4322 pubinfo.pk_as_rep = *pk_as_rep;
4323 pubinfo.ticket = *ticket;
4324 ASN1_MALLOC_ENCODE(PkinitSuppPubInfo, pub.data, pub.length,
4325 &pubinfo, &size, ret);
4327 krb5_set_error_message(context, ret, "out of memory");
4330 if (pub.length != size)
4331 krb5_abortx(context, "asn1 compiler internal error");
4333 ret = encode_uvinfo(context, client, &otherinfo.partyUInfo);
4338 ret = encode_uvinfo(context, server, &otherinfo.partyVInfo);
4340 free(otherinfo.partyUInfo.data);
4345 otherinfo.algorithmID = *ai;
4346 otherinfo.suppPubInfo = &pub;
4348 ASN1_MALLOC_ENCODE(PkinitSP80056AOtherInfo, other->data, other->length,
4349 &otherinfo, &size, ret);
4350 free(otherinfo.partyUInfo.data);
4351 free(otherinfo.partyVInfo.data);
4354 krb5_set_error_message(context, ret, "out of memory");
4357 if (other->length != size)
4358 krb5_abortx(context, "asn1 compiler internal error");
4364 _krb5_pk_kdf(krb5_context context,
4365 const struct AlgorithmIdentifier *ai,
4368 krb5_const_principal client,
4369 krb5_const_principal server,
4370 krb5_enctype enctype,
4371 const krb5_data *as_req,
4372 const krb5_data *pk_as_rep,
4373 const Ticket *ticket,
4376 struct encryption_type *et;
4377 krb5_error_code ret;
4379 size_t keylen, offset;
4381 unsigned char *keydata;
4382 unsigned char shaoutput[20];
4384 if (der_heim_oid_cmp(oid_id_pkinit_kdf_ah_sha1(), &ai->algorithm) != 0) {
4385 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4386 "kdf not supported");
4387 return KRB5_PROG_ETYPE_NOSUPP;
4389 if (ai->parameters != NULL &&
4390 (ai->parameters->length != 2 ||
4391 memcmp(ai->parameters->data, "\x05\x00", 2) != 0))
4393 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4394 "kdf params not NULL or the NULL-type");
4395 return KRB5_PROG_ETYPE_NOSUPP;
4398 et = _find_enctype(enctype);
4400 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4401 "encryption type %d not supported",
4403 return KRB5_PROG_ETYPE_NOSUPP;
4405 keylen = (et->keytype->bits + 7) / 8;
4407 keydata = malloc(keylen);
4408 if (keydata == NULL) {
4409 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
4413 ret = encode_otherinfo(context, ai, client, server,
4414 enctype, as_req, pk_as_rep, ticket, &other);
4423 unsigned char cdata[4];
4427 _krb5_put_int(cdata, counter, 4);
4428 SHA1_Update(&m, cdata, 4);
4429 SHA1_Update(&m, dhdata, dhsize);
4430 SHA1_Update(&m, other.data, other.length);
4431 SHA1_Final(shaoutput, &m);
4433 memcpy((unsigned char *)keydata + offset,
4435 min(keylen - offset, sizeof(shaoutput)));
4437 offset += sizeof(shaoutput);
4439 } while(offset < keylen);
4440 memset(shaoutput, 0, sizeof(shaoutput));
4444 ret = krb5_random_to_key(context, enctype, keydata, keylen, key);
4445 memset(keydata, 0, sizeof(keylen));
4452 krb5_error_code KRB5_LIB_FUNCTION
4453 krb5_crypto_prf_length(krb5_context context,
4457 struct encryption_type *et = _find_enctype(type);
4459 if(et == NULL || et->prf_length == 0) {
4460 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4461 "encryption type %d not supported",
4463 return KRB5_PROG_ETYPE_NOSUPP;
4466 *length = et->prf_length;
4470 krb5_error_code KRB5_LIB_FUNCTION
4471 krb5_crypto_prf(krb5_context context,
4472 const krb5_crypto crypto,
4473 const krb5_data *input,
4476 struct encryption_type *et = crypto->et;
4478 krb5_data_zero(output);
4480 if(et->prf == NULL) {
4481 krb5_set_error_message(context, KRB5_PROG_ETYPE_NOSUPP,
4482 "kerberos prf for %s not supported",
4484 return KRB5_PROG_ETYPE_NOSUPP;
4487 return (*et->prf)(context, crypto, input, output);
4490 #ifndef HEIMDAL_SMALLER
4493 * First take the configured list of etypes for `keytype' if available,
4494 * else, do `krb5_keytype_to_enctypes'.
4497 krb5_error_code KRB5_LIB_FUNCTION
4498 krb5_keytype_to_enctypes_default (krb5_context context,
4499 krb5_keytype keytype,
4502 __attribute__((deprecated))
4507 if (keytype != KEYTYPE_DES || context->etypes_des == NULL)
4508 return krb5_keytype_to_enctypes (context, keytype, len, val);
4510 for (n = 0; context->etypes_des[n]; ++n)
4512 ret = malloc (n * sizeof(*ret));
4513 if (ret == NULL && n != 0) {
4514 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
4517 for (i = 0; i < n; ++i)
4518 ret[i] = context->etypes_des[i];
4524 krb5_error_code KRB5_LIB_FUNCTION
4525 krb5_keytype_to_string(krb5_context context,
4526 krb5_keytype keytype,
4528 __attribute__((deprecated))
4530 struct key_type *kt = _find_keytype(keytype);
4532 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
4533 "key type %d not supported", keytype);
4534 return KRB5_PROG_KEYTYPE_NOSUPP;
4536 *string = strdup(kt->name);
4537 if(*string == NULL) {
4538 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
4545 krb5_error_code KRB5_LIB_FUNCTION
4546 krb5_string_to_keytype(krb5_context context,
4548 krb5_keytype *keytype)
4549 __attribute__((deprecated))
4554 for(i = 0; i < num_keytypes; i++)
4555 if(strcasecmp(keytypes[i]->name, string) == 0){
4556 *keytype = keytypes[i]->type;
4560 /* check if the enctype is a number */
4561 *keytype = strtol(string, &end, 0);
4562 if(*end == '\0' && *keytype != 0) {
4563 if (krb5_enctype_valid(context, *keytype) == 0)
4567 krb5_set_error_message(context, KRB5_PROG_KEYTYPE_NOSUPP,
4568 "key type %s not supported", string);
4569 return KRB5_PROG_KEYTYPE_NOSUPP;
4572 krb5_error_code KRB5_LIB_FUNCTION
4573 krb5_keytype_to_enctypes (krb5_context context,
4574 krb5_keytype keytype,
4582 for (i = num_etypes - 1; i >= 0; --i) {
4583 if (etypes[i]->keytype->type == keytype
4584 && !(etypes[i]->flags & F_PSEUDO))
4587 ret = malloc(n * sizeof(*ret));
4588 if (ret == NULL && n != 0) {
4589 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
4593 for (i = num_etypes - 1; i >= 0; --i) {
4594 if (etypes[i]->keytype->type == keytype
4595 && !(etypes[i]->flags & F_PSEUDO))
4596 ret[n++] = etypes[i]->type;