2 * Copyright (c) 1999 - 2002 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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36 /* keytab backend for HDB databases */
38 RCSID("$Id: keytab.c,v 1.5 2002/08/26 13:28:11 assar Exp $");
46 * the format for HDB keytabs is:
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);
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 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 krb5_config_binding *default_binding = NULL;
149 krb5_config_binding *db;
150 krb5_realm *prealm = krb5_princ_realm(context, (krb5_principal)principal);
152 *dbname = *mkey = NULL;
154 while ((db = (krb5_config_binding *)
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;
205 find_db (context, &dbname, &mkey, principal);
207 ret = hdb_create (context, &db, dbname);
210 ret = hdb_set_master_keyfile (context, db, mkey);
212 (*db->destroy)(context, db);
216 ret = (*db->open)(context, db, O_RDONLY, 0);
218 (*db->destroy)(context, db);
221 ent.principal = (krb5_principal)principal;
222 ret = (*db->fetch)(context, db, HDB_F_DECRYPT, &ent);
223 (*db->close)(context, db);
224 (*db->destroy)(context, db);
226 if(ret == HDB_ERR_NOENTRY)
227 return KRB5_KT_NOTFOUND;
230 if(kvno && ent.kvno != kvno) {
231 hdb_free_entry(context, &ent);
232 return KRB5_KT_NOTFOUND;
236 enctype = ent.keys.val[0].key.keytype;
237 ret = KRB5_KT_NOTFOUND;
238 for(i = 0; i < ent.keys.len; i++) {
239 if(ent.keys.val[i].key.keytype == enctype) {
240 krb5_copy_principal(context, principal, &entry->principal);
241 entry->vno = ent.kvno;
242 krb5_copy_keyblock_contents(context,
243 &ent.keys.val[i].key,
249 hdb_free_entry(context, &ent);
253 krb5_kt_ops hdb_kt_ops = {
259 NULL, /* start_seq_get */
260 NULL, /* next_entry */
261 NULL, /* end_seq_get */