2 * Copyright (c) 1999 - 2002 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
36 /* keytab backend for HDB databases */
38 RCSID("$Id: keytab.c 18380 2006-10-09 12:36:40Z lha $");
46 * the format for HDB keytabs is:
47 * HDB:[database:file:mkey]
50 static krb5_error_code
51 hdb_resolve(krb5_context context, const char *name, krb5_keytab id)
54 const char *db, *mkey;
56 d = malloc(sizeof(*d));
58 krb5_set_error_string(context, "malloc: out of memory");
62 mkey = strchr(name, ':');
63 if(mkey == NULL || mkey[1] == '\0') {
67 d->dbname = strdup(name);
68 if(d->dbname == NULL) {
70 krb5_set_error_string(context, "malloc: out of memory");
76 if((mkey - db) == 0) {
79 d->dbname = malloc(mkey - db + 1);
80 if(d->dbname == NULL) {
82 krb5_set_error_string(context, "malloc: out of memory");
85 memmove(d->dbname, db, mkey - db);
86 d->dbname[mkey - db] = '\0';
88 d->mkey = strdup(mkey + 1);
92 krb5_set_error_string(context, "malloc: out of memory");
100 static krb5_error_code
101 hdb_close(krb5_context context, krb5_keytab id)
103 struct hdb_data *d = id->data;
111 static krb5_error_code
112 hdb_get_name(krb5_context context,
117 struct hdb_data *d = id->data;
119 snprintf(name, namesize, "%s%s%s",
120 d->dbname ? d->dbname : "",
121 (d->dbname || d->mkey) ? ":" : "",
122 d->mkey ? d->mkey : "");
127 set_config (krb5_context context,
128 const krb5_config_binding *binding,
132 *dbname = krb5_config_get_string(context, binding, "dbname", NULL);
133 *mkey = krb5_config_get_string(context, binding, "mkey_file", NULL);
137 * try to figure out the database (`dbname') and master-key (`mkey')
138 * that should be used for `principal'.
142 find_db (krb5_context context,
145 krb5_const_principal principal)
147 const krb5_config_binding *top_bind = NULL;
148 const krb5_config_binding *default_binding = NULL;
149 const krb5_config_binding *db;
150 krb5_realm *prealm = krb5_princ_realm(context, rk_UNCONST(principal));
152 *dbname = *mkey = NULL;
155 krb5_config_get_next(context,
164 p = krb5_config_get_string (context, db, "realm", NULL);
166 if(default_binding) {
167 krb5_warnx(context, "WARNING: more than one realm-less "
168 "database specification");
169 krb5_warnx(context, "WARNING: using the first encountered");
171 default_binding = db;
172 } else if (strcmp (*prealm, p) == 0) {
173 set_config (context, db, dbname, mkey);
177 if (*dbname == NULL && default_binding != NULL)
178 set_config (context, default_binding, dbname, mkey);
180 *dbname = HDB_DEFAULT_DB;
184 * find the keytab entry in `id' for `principal, kvno, enctype' and return
185 * it in `entry'. return 0 or an error code
188 static krb5_error_code
189 hdb_get_entry(krb5_context context,
191 krb5_const_principal principal,
193 krb5_enctype enctype,
194 krb5_keytab_entry *entry)
198 struct hdb_data *d = id->data;
201 const char *dbname = d->dbname;
202 const char *mkey = d->mkey;
204 memset(&ent, 0, sizeof(ent));
207 find_db (context, &dbname, &mkey, principal);
209 ret = hdb_create (context, &db, dbname);
212 ret = hdb_set_master_keyfile (context, db, mkey);
214 (*db->hdb_destroy)(context, db);
218 ret = (*db->hdb_open)(context, db, O_RDONLY, 0);
220 (*db->hdb_destroy)(context, db);
223 ret = (*db->hdb_fetch)(context, db, principal,
225 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
228 if(ret == HDB_ERR_NOENTRY) {
229 ret = KRB5_KT_NOTFOUND;
234 if(kvno && ent.entry.kvno != kvno) {
235 hdb_free_entry(context, &ent);
236 ret = KRB5_KT_NOTFOUND;
240 if(ent.entry.keys.len > 0)
241 enctype = ent.entry.keys.val[0].key.keytype;
242 ret = KRB5_KT_NOTFOUND;
243 for(i = 0; i < ent.entry.keys.len; i++) {
244 if(ent.entry.keys.val[i].key.keytype == enctype) {
245 krb5_copy_principal(context, principal, &entry->principal);
246 entry->vno = ent.entry.kvno;
247 krb5_copy_keyblock_contents(context,
248 &ent.entry.keys.val[i].key,
254 hdb_free_entry(context, &ent);
256 (*db->hdb_close)(context, db);
257 (*db->hdb_destroy)(context, db);
261 krb5_kt_ops hdb_kt_ops = {
267 NULL, /* start_seq_get */
268 NULL, /* next_entry */
269 NULL, /* end_seq_get */