2 * Copyright (c) 1999 - 2002 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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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
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 /* keytab backend for HDB databases */
45 hdb_entry_ex hdb_entry;
51 * the format for HDB keytabs is:
52 * HDB:[HDBFORMAT:database-specific-data[:mkey=mkey-file]]
55 static krb5_error_code KRB5_CALLCONV
56 hdb_resolve(krb5_context context, const char *name, krb5_keytab id)
59 const char *db, *mkey;
61 d = malloc(sizeof(*d));
63 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
67 mkey = strstr(name, ":mkey=");
68 if(mkey == NULL || mkey[5] == '\0') {
72 d->dbname = strdup(name);
73 if(d->dbname == NULL) {
75 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
81 d->dbname = malloc(mkey - db + 1);
82 if(d->dbname == NULL) {
84 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
87 memmove(d->dbname, db, mkey - db);
88 d->dbname[mkey - db] = '\0';
90 d->mkey = strdup(mkey + 5);
94 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
102 static krb5_error_code KRB5_CALLCONV
103 hdb_close(krb5_context context, krb5_keytab id)
105 struct hdb_data *d = id->data;
113 static krb5_error_code KRB5_CALLCONV
114 hdb_get_name(krb5_context context,
119 struct hdb_data *d = id->data;
121 snprintf(name, namesize, "%s%s%s",
122 d->dbname ? d->dbname : "",
123 (d->dbname || d->mkey) ? ":" : "",
124 d->mkey ? d->mkey : "");
129 * try to figure out the database (`dbname') and master-key (`mkey')
130 * that should be used for `principal'.
133 static krb5_error_code
134 find_db (krb5_context context,
137 krb5_const_principal principal)
139 krb5_const_realm realm = krb5_principal_get_realm(context, principal);
141 struct hdb_dbinfo *head, *dbinfo = NULL;
143 *dbname = *mkey = NULL;
145 ret = hdb_get_dbinfo(context, &head);
149 while ((dbinfo = hdb_dbinfo_get_next(head, dbinfo)) != NULL) {
150 const char *p = hdb_dbinfo_get_realm(context, dbinfo);
151 if (p && strcmp (realm, p) == 0) {
152 p = hdb_dbinfo_get_dbname(context, dbinfo);
155 p = hdb_dbinfo_get_mkey_file(context, dbinfo);
161 hdb_free_dbinfo(context, &head);
163 *dbname = strdup(HDB_DEFAULT_DB);
168 * find the keytab entry in `id' for `principal, kvno, enctype' and return
169 * it in `entry'. return 0 or an error code
172 static krb5_error_code KRB5_CALLCONV
173 hdb_get_entry(krb5_context context,
175 krb5_const_principal principal,
177 krb5_enctype enctype,
178 krb5_keytab_entry *entry)
182 struct hdb_data *d = id->data;
183 const char *dbname = d->dbname;
184 const char *mkey = d->mkey;
185 char *fdbname = NULL, *fmkey = NULL;
189 memset(&ent, 0, sizeof(ent));
191 if (dbname == NULL) {
192 ret = find_db(context, &fdbname, &fmkey, principal);
199 ret = hdb_create (context, &db, dbname);
202 ret = hdb_set_master_keyfile (context, db, mkey);
204 (*db->hdb_destroy)(context, db);
208 ret = (*db->hdb_open)(context, db, O_RDONLY, 0);
210 (*db->hdb_destroy)(context, db);
214 ret = (*db->hdb_fetch_kvno)(context, db, principal,
215 HDB_F_DECRYPT|HDB_F_KVNO_SPECIFIED|
216 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
219 if(ret == HDB_ERR_NOENTRY) {
220 ret = KRB5_KT_NOTFOUND;
225 if(kvno && (krb5_kvno)ent.entry.kvno != kvno) {
226 hdb_free_entry(context, &ent);
227 ret = KRB5_KT_NOTFOUND;
231 if(ent.entry.keys.len > 0)
232 enctype = ent.entry.keys.val[0].key.keytype;
233 ret = KRB5_KT_NOTFOUND;
234 for(i = 0; i < ent.entry.keys.len; i++) {
235 if(ent.entry.keys.val[i].key.keytype == enctype) {
236 krb5_copy_principal(context, principal, &entry->principal);
237 entry->vno = ent.entry.kvno;
238 krb5_copy_keyblock_contents(context,
239 &ent.entry.keys.val[i].key,
245 hdb_free_entry(context, &ent);
247 (*db->hdb_close)(context, db);
248 (*db->hdb_destroy)(context, db);
256 * find the keytab entry in `id' for `principal, kvno, enctype' and return
257 * it in `entry'. return 0 or an error code
260 static krb5_error_code KRB5_CALLCONV
261 hdb_start_seq_get(krb5_context context,
263 krb5_kt_cursor *cursor)
266 struct hdb_cursor *c;
267 struct hdb_data *d = id->data;
268 const char *dbname = d->dbname;
269 const char *mkey = d->mkey;
272 if (dbname == NULL) {
274 * We don't support enumerating without being told what
275 * backend to enumerate on
277 ret = KRB5_KT_NOTFOUND;
281 ret = hdb_create (context, &db, dbname);
284 ret = hdb_set_master_keyfile (context, db, mkey);
286 (*db->hdb_destroy)(context, db);
290 ret = (*db->hdb_open)(context, db, O_RDONLY, 0);
292 (*db->hdb_destroy)(context, db);
296 cursor->data = c = malloc (sizeof(*c));
298 (*db->hdb_close)(context, db);
299 (*db->hdb_destroy)(context, db);
300 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
313 static int KRB5_CALLCONV
314 hdb_next_entry(krb5_context context,
316 krb5_keytab_entry *entry,
317 krb5_kt_cursor *cursor)
319 struct hdb_cursor *c = cursor->data;
322 memset(entry, 0, sizeof(*entry));
326 ret = (c->db->hdb_firstkey)(context, c->db,
328 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
330 if (ret == HDB_ERR_NOENTRY)
335 if (c->hdb_entry.entry.keys.len == 0)
336 hdb_free_entry(context, &c->hdb_entry);
342 ret = (c->db->hdb_nextkey)(context, c->db,
344 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
346 if (ret == HDB_ERR_NOENTRY)
351 /* If no keys on this entry, try again */
352 if (c->hdb_entry.entry.keys.len == 0)
353 hdb_free_entry(context, &c->hdb_entry);
359 * Return next enc type (keytabs are one slot per key, while
360 * hdb is one record per principal.
363 ret = krb5_copy_principal(context,
364 c->hdb_entry.entry.principal,
369 entry->vno = c->hdb_entry.entry.kvno;
370 ret = krb5_copy_keyblock_contents(context,
371 &c->hdb_entry.entry.keys.val[c->key_idx].key,
374 krb5_free_principal(context, entry->principal);
375 memset(entry, 0, sizeof(*entry));
381 * Once we get to the end of the list, signal that we want the
385 if ((size_t)c->key_idx == c->hdb_entry.entry.keys.len) {
386 hdb_free_entry(context, &c->hdb_entry);
395 static int KRB5_CALLCONV
396 hdb_end_seq_get(krb5_context context,
398 krb5_kt_cursor *cursor)
400 struct hdb_cursor *c = cursor->data;
403 hdb_free_entry(context, &c->hdb_entry);
405 (c->db->hdb_close)(context, c->db);
406 (c->db->hdb_destroy)(context, c->db);
412 krb5_kt_ops hdb_kt_ops = {