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
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18 * may be used to endorse or promote products derived from this software
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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:[database:file:mkey]
55 static krb5_error_code
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 = strchr(name, ':');
68 if(mkey == NULL || mkey[1] == '\0') {
72 d->dbname = strdup(name);
73 if(d->dbname == NULL) {
75 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
81 if((mkey - db) == 0) {
84 d->dbname = malloc(mkey - db + 1);
85 if(d->dbname == NULL) {
87 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
90 memmove(d->dbname, db, mkey - db);
91 d->dbname[mkey - db] = '\0';
93 d->mkey = strdup(mkey + 1);
97 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
105 static krb5_error_code
106 hdb_close(krb5_context context, krb5_keytab id)
108 struct hdb_data *d = id->data;
116 static krb5_error_code
117 hdb_get_name(krb5_context context,
122 struct hdb_data *d = id->data;
124 snprintf(name, namesize, "%s%s%s",
125 d->dbname ? d->dbname : "",
126 (d->dbname || d->mkey) ? ":" : "",
127 d->mkey ? d->mkey : "");
132 * try to figure out the database (`dbname') and master-key (`mkey')
133 * that should be used for `principal'.
136 static krb5_error_code
137 find_db (krb5_context context,
140 krb5_const_principal principal)
142 krb5_const_realm realm = krb5_principal_get_realm(context, principal);
144 struct hdb_dbinfo *head, *dbinfo = NULL;
146 *dbname = *mkey = NULL;
148 ret = hdb_get_dbinfo(context, &head);
152 while ((dbinfo = hdb_dbinfo_get_next(head, dbinfo)) != NULL) {
153 const char *p = hdb_dbinfo_get_realm(context, dbinfo);
154 if (p && strcmp (realm, p) == 0) {
155 p = hdb_dbinfo_get_dbname(context, dbinfo);
158 p = hdb_dbinfo_get_mkey_file(context, dbinfo);
164 hdb_free_dbinfo(context, &head);
166 *dbname = strdup(HDB_DEFAULT_DB);
171 * find the keytab entry in `id' for `principal, kvno, enctype' and return
172 * it in `entry'. return 0 or an error code
175 static krb5_error_code
176 hdb_get_entry(krb5_context context,
178 krb5_const_principal principal,
180 krb5_enctype enctype,
181 krb5_keytab_entry *entry)
185 struct hdb_data *d = id->data;
186 const char *dbname = d->dbname;
187 const char *mkey = d->mkey;
188 char *fdbname = NULL, *fmkey = NULL;
192 memset(&ent, 0, sizeof(ent));
194 if (dbname == NULL) {
195 ret = find_db(context, &fdbname, &fmkey, principal);
202 ret = hdb_create (context, &db, dbname);
205 ret = hdb_set_master_keyfile (context, db, mkey);
207 (*db->hdb_destroy)(context, db);
211 ret = (*db->hdb_open)(context, db, O_RDONLY, 0);
213 (*db->hdb_destroy)(context, db);
216 ret = (*db->hdb_fetch)(context, db, principal,
218 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
221 if(ret == HDB_ERR_NOENTRY) {
222 ret = KRB5_KT_NOTFOUND;
227 if(kvno && ent.entry.kvno != kvno) {
228 hdb_free_entry(context, &ent);
229 ret = KRB5_KT_NOTFOUND;
233 if(ent.entry.keys.len > 0)
234 enctype = ent.entry.keys.val[0].key.keytype;
235 ret = KRB5_KT_NOTFOUND;
236 for(i = 0; i < ent.entry.keys.len; i++) {
237 if(ent.entry.keys.val[i].key.keytype == enctype) {
238 krb5_copy_principal(context, principal, &entry->principal);
239 entry->vno = ent.entry.kvno;
240 krb5_copy_keyblock_contents(context,
241 &ent.entry.keys.val[i].key,
247 hdb_free_entry(context, &ent);
249 (*db->hdb_close)(context, db);
250 (*db->hdb_destroy)(context, db);
258 * find the keytab entry in `id' for `principal, kvno, enctype' and return
259 * it in `entry'. return 0 or an error code
262 static krb5_error_code
263 hdb_start_seq_get(krb5_context context,
265 krb5_kt_cursor *cursor)
268 struct hdb_cursor *c;
269 struct hdb_data *d = id->data;
270 const char *dbname = d->dbname;
271 const char *mkey = d->mkey;
274 if (dbname == NULL) {
276 * We don't support enumerating without being told what
277 * backend to enumerate on
279 ret = KRB5_KT_NOTFOUND;
283 ret = hdb_create (context, &db, dbname);
286 ret = hdb_set_master_keyfile (context, db, mkey);
288 (*db->hdb_destroy)(context, db);
292 ret = (*db->hdb_open)(context, db, O_RDONLY, 0);
294 (*db->hdb_destroy)(context, db);
298 cursor->data = c = malloc (sizeof(*c));
300 (*db->hdb_close)(context, db);
301 (*db->hdb_destroy)(context, db);
302 krb5_set_error_message(context, ENOMEM, "malloc: out of memory");
316 hdb_next_entry(krb5_context context,
318 krb5_keytab_entry *entry,
319 krb5_kt_cursor *cursor)
321 struct hdb_cursor *c = cursor->data;
324 memset(entry, 0, sizeof(*entry));
328 ret = (c->db->hdb_firstkey)(context, c->db,
330 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
332 if (ret == HDB_ERR_NOENTRY)
337 if (c->hdb_entry.entry.keys.len == 0)
338 hdb_free_entry(context, &c->hdb_entry);
344 ret = (c->db->hdb_nextkey)(context, c->db,
346 HDB_F_GET_CLIENT|HDB_F_GET_SERVER|HDB_F_GET_KRBTGT,
348 if (ret == HDB_ERR_NOENTRY)
353 /* If no keys on this entry, try again */
354 if (c->hdb_entry.entry.keys.len == 0)
355 hdb_free_entry(context, &c->hdb_entry);
361 * Return next enc type (keytabs are one slot per key, while
362 * hdb is one record per principal.
365 ret = krb5_copy_principal(context,
366 c->hdb_entry.entry.principal,
371 entry->vno = c->hdb_entry.entry.kvno;
372 ret = krb5_copy_keyblock_contents(context,
373 &c->hdb_entry.entry.keys.val[c->key_idx].key,
376 krb5_free_principal(context, entry->principal);
377 memset(entry, 0, sizeof(*entry));
383 * Once we get to the end of the list, signal that we want the
387 if (c->key_idx == c->hdb_entry.entry.keys.len) {
388 hdb_free_entry(context, &c->hdb_entry);
398 hdb_end_seq_get(krb5_context context,
400 krb5_kt_cursor *cursor)
402 struct hdb_cursor *c = cursor->data;
405 hdb_free_entry(context, &c->hdb_entry);
407 (c->db->hdb_close)(context, c->db);
408 (c->db->hdb_destroy)(context, c->db);
414 krb5_kt_ops hdb_kt_ops = {