2 Unix SMB/CIFS implementation.
4 Database Glue between Samba and the KDC
6 Copyright (C) Guenther Deschner <gd@samba.org> 2014
7 Copyright (C) Andreas Schneider <asn@samba.org> 2014
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "system/kerberos.h"
27 #include "samba_kdc.h"
28 #include "lib/krb5_wrap/krb5_samba.h"
31 #define DBGC_CLASS DBGC_KERBEROS
33 void sdb_key_free(struct sdb_key *k)
40 * Passing NULL as the Kerberos context is intentional here, as
41 * both Heimdal and MIT libraries don't use the context when
42 * clearing the keyblocks.
44 krb5_free_keyblock_contents(NULL, &k->key);
47 smb_krb5_free_data_contents(NULL, &k->salt->salt);
54 void sdb_keys_free(struct sdb_keys *keys)
62 for (i=0; i < keys->len; i++) {
63 sdb_key_free(&keys->val[i]);
70 void sdb_entry_free(struct sdb_entry *s)
72 if (s->skdc_entry != NULL) {
73 s->skdc_entry->db_entry = NULL;
74 TALLOC_FREE(s->skdc_entry);
78 * Passing NULL as the Kerberos context is intentional here, as both
79 * Heimdal and MIT libraries don't use the context when clearing the
82 krb5_free_principal(NULL, s->principal);
84 sdb_keys_free(&s->keys);
85 sdb_keys_free(&s->old_keys);
86 sdb_keys_free(&s->older_keys);
87 krb5_free_principal(NULL, s->created_by.principal);
89 krb5_free_principal(NULL, s->modified_by->principal);
91 SAFE_FREE(s->valid_start);
92 SAFE_FREE(s->valid_end);
98 struct SDBFlags int2SDBFlags(unsigned n)
100 struct SDBFlags flags;
102 memset(&flags, 0, sizeof(flags));
104 flags.initial = (n >> 0) & 1;
105 flags.forwardable = (n >> 1) & 1;
106 flags.proxiable = (n >> 2) & 1;
107 flags.renewable = (n >> 3) & 1;
108 flags.postdate = (n >> 4) & 1;
109 flags.server = (n >> 5) & 1;
110 flags.client = (n >> 6) & 1;
111 flags.invalid = (n >> 7) & 1;
112 flags.require_preauth = (n >> 8) & 1;
113 flags.change_pw = (n >> 9) & 1;
114 flags.require_hwauth = (n >> 10) & 1;
115 flags.ok_as_delegate = (n >> 11) & 1;
116 flags.user_to_user = (n >> 12) & 1;
117 flags.immutable = (n >> 13) & 1;
118 flags.trusted_for_delegation = (n >> 14) & 1;
119 flags.allow_kerberos4 = (n >> 15) & 1;
120 flags.allow_digest = (n >> 16) & 1;
121 flags.locked_out = (n >> 17) & 1;
122 flags.do_not_store = (n >> 31) & 1;
126 /* Set the etypes of an sdb_entry based on its available current keys. */
127 krb5_error_code sdb_entry_set_etypes(struct sdb_entry *s)
129 if (s->keys.val != NULL) {
132 s->etypes = malloc(sizeof(*s->etypes));
133 if (s->etypes == NULL) {
137 s->etypes->len = s->keys.len;
139 s->etypes->val = calloc(s->etypes->len, sizeof(*s->etypes->val));
140 if (s->etypes->val == NULL) {
144 for (i = 0; i < s->etypes->len; i++) {
145 const struct sdb_key *k = &s->keys.val[i];
147 s->etypes->val[i] = KRB5_KEY_TYPE(&(k->key));
155 * Set the session etypes of a server sdb_entry based on its etypes, forcing in
156 * strong etypes as desired.
158 krb5_error_code sdb_entry_set_session_etypes(struct sdb_entry *s,
166 /* Reserve space for AES256 */
171 /* Reserve space for AES128 */
176 /* Reserve space for RC4. */
183 s->session_etypes = malloc(sizeof(*s->session_etypes));
184 if (s->session_etypes == NULL) {
188 /* session_etypes must be sorted in order of strength, with preferred etype first. */
190 s->session_etypes->val = calloc(len, sizeof(*s->session_etypes->val));
191 if (s->session_etypes->val == NULL) {
192 SAFE_FREE(s->session_etypes);
198 s->session_etypes->val[j++] = ENCTYPE_AES256_CTS_HMAC_SHA1_96;
203 s->session_etypes->val[j++] = ENCTYPE_AES128_CTS_HMAC_SHA1_96;
208 s->session_etypes->val[j++] = ENCTYPE_ARCFOUR_HMAC;
211 s->session_etypes->len = j;