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+/*
+ * Copyright (c) 1997-2002 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "hdb_locl.h"
+
+RCSID("$Id: common.c 20236 2007-02-16 23:52:29Z lha $");
+
+int
+hdb_principal2key(krb5_context context, krb5_const_principal p, krb5_data *key)
+{
+ Principal new;
+ size_t len;
+ int ret;
+
+ ret = copy_Principal(p, &new);
+ if(ret)
+ return ret;
+ new.name.name_type = 0;
+
+ ASN1_MALLOC_ENCODE(Principal, key->data, key->length, &new, &len, ret);
+ if (ret == 0 && key->length != len)
+ krb5_abortx(context, "internal asn.1 encoder error");
+ free_Principal(&new);
+ return ret;
+}
+
+int
+hdb_key2principal(krb5_context context, krb5_data *key, krb5_principal p)
+{
+ return decode_Principal(key->data, key->length, p, NULL);
+}
+
+int
+hdb_entry2value(krb5_context context, const hdb_entry *ent, krb5_data *value)
+{
+ size_t len;
+ int ret;
+
+ ASN1_MALLOC_ENCODE(hdb_entry, value->data, value->length, ent, &len, ret);
+ if (ret == 0 && value->length != len)
+ krb5_abortx(context, "internal asn.1 encoder error");
+ return ret;
+}
+
+int
+hdb_value2entry(krb5_context context, krb5_data *value, hdb_entry *ent)
+{
+ return decode_hdb_entry(value->data, value->length, ent, NULL);
+}
+
+int
+hdb_entry_alias2value(krb5_context context,
+ const hdb_entry_alias *alias,
+ krb5_data *value)
+{
+ size_t len;
+ int ret;
+
+ ASN1_MALLOC_ENCODE(hdb_entry_alias, value->data, value->length,
+ alias, &len, ret);
+ if (ret == 0 && value->length != len)
+ krb5_abortx(context, "internal asn.1 encoder error");
+ return ret;
+}
+
+int
+hdb_value2entry_alias(krb5_context context, krb5_data *value,
+ hdb_entry_alias *ent)
+{
+ return decode_hdb_entry_alias(value->data, value->length, ent, NULL);
+}
+
+krb5_error_code
+_hdb_fetch(krb5_context context, HDB *db, krb5_const_principal principal,
+ unsigned flags, hdb_entry_ex *entry)
+{
+ krb5_data key, value;
+ int code;
+
+ hdb_principal2key(context, principal, &key);
+ code = db->hdb__get(context, db, key, &value);
+ krb5_data_free(&key);
+ if(code)
+ return code;
+ code = hdb_value2entry(context, &value, &entry->entry);
+ if (code == ASN1_BAD_ID && (flags & HDB_F_CANON) == 0) {
+ krb5_data_free(&value);
+ return HDB_ERR_NOENTRY;
+ } else if (code == ASN1_BAD_ID) {
+ hdb_entry_alias alias;
+
+ code = hdb_value2entry_alias(context, &value, &alias);
+ if (code) {
+ krb5_data_free(&value);
+ return code;
+ }
+ hdb_principal2key(context, alias.principal, &key);
+ krb5_data_free(&value);
+ free_hdb_entry_alias(&alias);
+
+ code = db->hdb__get(context, db, key, &value);
+ krb5_data_free(&key);
+ if (code)
+ return code;
+ code = hdb_value2entry(context, &value, &entry->entry);
+ if (code) {
+ krb5_data_free(&value);
+ return code;
+ }
+ }
+ krb5_data_free(&value);
+ if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
+ code = hdb_unseal_keys (context, db, &entry->entry);
+ if (code)
+ hdb_free_entry(context, entry);
+ }
+ return code;
+}
+
+static krb5_error_code
+hdb_remove_aliases(krb5_context context, HDB *db, krb5_data *key)
+{
+ const HDB_Ext_Aliases *aliases;
+ krb5_error_code code;
+ hdb_entry oldentry;
+ krb5_data value;
+ int i;
+
+ code = db->hdb__get(context, db, *key, &value);
+ if (code == HDB_ERR_NOENTRY)
+ return 0;
+ else if (code)
+ return code;
+
+ code = hdb_value2entry(context, &value, &oldentry);
+ krb5_data_free(&value);
+ if (code)
+ return code;
+
+ code = hdb_entry_get_aliases(&oldentry, &aliases);
+ if (code || aliases == NULL) {
+ free_hdb_entry(&oldentry);
+ return code;
+ }
+ for (i = 0; i < aliases->aliases.len; i++) {
+ krb5_data akey;
+
+ hdb_principal2key(context, &aliases->aliases.val[i], &akey);
+ code = db->hdb__del(context, db, akey);
+ krb5_data_free(&akey);
+ if (code) {
+ free_hdb_entry(&oldentry);
+ return code;
+ }
+ }
+ free_hdb_entry(&oldentry);
+ return 0;
+}
+
+static krb5_error_code
+hdb_add_aliases(krb5_context context, HDB *db,
+ unsigned flags, hdb_entry_ex *entry)
+{
+ const HDB_Ext_Aliases *aliases;
+ krb5_error_code code;
+ krb5_data key, value;
+ int i;
+
+ code = hdb_entry_get_aliases(&entry->entry, &aliases);
+ if (code || aliases == NULL)
+ return code;
+
+ for (i = 0; i < aliases->aliases.len; i++) {
+ hdb_entry_alias entryalias;
+ entryalias.principal = entry->entry.principal;
+
+ hdb_principal2key(context, &aliases->aliases.val[i], &key);
+ code = hdb_entry_alias2value(context, &entryalias, &value);
+ if (code) {
+ krb5_data_free(&key);
+ return code;
+ }
+ code = db->hdb__put(context, db, flags, key, value);
+ krb5_data_free(&key);
+ krb5_data_free(&value);
+ if (code)
+ return code;
+ }
+ return 0;
+}
+
+krb5_error_code
+_hdb_store(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
+{
+ krb5_data key, value;
+ int code;
+
+ if(entry->entry.generation == NULL) {
+ struct timeval t;
+ entry->entry.generation = malloc(sizeof(*entry->entry.generation));
+ if(entry->entry.generation == NULL) {
+ krb5_set_error_string(context, "malloc: out of memory");
+ return ENOMEM;
+ }
+ gettimeofday(&t, NULL);
+ entry->entry.generation->time = t.tv_sec;
+ entry->entry.generation->usec = t.tv_usec;
+ entry->entry.generation->gen = 0;
+ } else
+ entry->entry.generation->gen++;
+ hdb_principal2key(context, entry->entry.principal, &key);
+ code = hdb_seal_keys(context, db, &entry->entry);
+ if (code) {
+ krb5_data_free(&key);
+ return code;
+ }
+
+ /* remove aliases */
+ code = hdb_remove_aliases(context, db, &key);
+ if (code) {
+ krb5_data_free(&key);
+ return code;
+ }
+ hdb_entry2value(context, &entry->entry, &value);
+ code = db->hdb__put(context, db, flags & HDB_F_REPLACE, key, value);
+ krb5_data_free(&value);
+ krb5_data_free(&key);
+ if (code)
+ return code;
+
+ code = hdb_add_aliases(context, db, flags, entry);
+
+ return code;
+}
+
+krb5_error_code
+_hdb_remove(krb5_context context, HDB *db, krb5_const_principal principal)
+{
+ krb5_data key;
+ int code;
+
+ hdb_principal2key(context, principal, &key);
+
+ code = hdb_remove_aliases(context, db, &key);
+ if (code) {
+ krb5_data_free(&key);
+ return code;
+ }
+ code = db->hdb__del(context, db, key);
+ krb5_data_free(&key);
+ return code;
+}
+
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