338 lines
8.8 KiB
C
338 lines
8.8 KiB
C
/*
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* Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hdb_locl.h"
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RCSID("$Id: db.c 20215 2007-02-09 21:59:53Z lha $");
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#if HAVE_DB1
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#if defined(HAVE_DB_185_H)
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#include <db_185.h>
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#elif defined(HAVE_DB_H)
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#include <db.h>
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#endif
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static krb5_error_code
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DB_close(krb5_context context, HDB *db)
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{
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DB *d = (DB*)db->hdb_db;
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(*d->close)(d);
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return 0;
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}
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static krb5_error_code
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DB_destroy(krb5_context context, HDB *db)
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{
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krb5_error_code ret;
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ret = hdb_clear_master_key (context, db);
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free(db->hdb_name);
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free(db);
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return ret;
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}
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static krb5_error_code
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DB_lock(krb5_context context, HDB *db, int operation)
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{
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DB *d = (DB*)db->hdb_db;
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int fd = (*d->fd)(d);
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if(fd < 0) {
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krb5_set_error_string(context,
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"Can't lock database: %s", db->hdb_name);
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return HDB_ERR_CANT_LOCK_DB;
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}
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return hdb_lock(fd, operation);
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}
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static krb5_error_code
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DB_unlock(krb5_context context, HDB *db)
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{
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DB *d = (DB*)db->hdb_db;
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int fd = (*d->fd)(d);
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if(fd < 0) {
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krb5_set_error_string(context,
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"Can't unlock database: %s", db->hdb_name);
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return HDB_ERR_CANT_LOCK_DB;
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}
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return hdb_unlock(fd);
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}
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static krb5_error_code
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DB_seq(krb5_context context, HDB *db,
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unsigned flags, hdb_entry_ex *entry, int flag)
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{
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DB *d = (DB*)db->hdb_db;
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DBT key, value;
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krb5_data key_data, data;
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int code;
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code = db->hdb_lock(context, db, HDB_RLOCK);
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if(code == -1) {
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krb5_set_error_string(context, "Database %s in use", db->hdb_name);
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return HDB_ERR_DB_INUSE;
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}
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code = (*d->seq)(d, &key, &value, flag);
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db->hdb_unlock(context, db); /* XXX check value */
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if(code == -1) {
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code = errno;
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krb5_set_error_string(context, "Database %s seq error: %s",
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db->hdb_name, strerror(code));
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return code;
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}
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if(code == 1) {
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krb5_clear_error_string(context);
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return HDB_ERR_NOENTRY;
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}
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key_data.data = key.data;
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key_data.length = key.size;
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data.data = value.data;
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data.length = value.size;
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memset(entry, 0, sizeof(*entry));
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if (hdb_value2entry(context, &data, &entry->entry))
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return DB_seq(context, db, flags, entry, R_NEXT);
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if (db->hdb_master_key_set && (flags & HDB_F_DECRYPT)) {
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code = hdb_unseal_keys (context, db, &entry->entry);
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if (code)
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hdb_free_entry (context, entry);
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}
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if (code == 0 && entry->entry.principal == NULL) {
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entry->entry.principal = malloc(sizeof(*entry->entry.principal));
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if (entry->entry.principal == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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code = ENOMEM;
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hdb_free_entry (context, entry);
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} else {
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hdb_key2principal(context, &key_data, entry->entry.principal);
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}
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}
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return code;
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}
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static krb5_error_code
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DB_firstkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
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{
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return DB_seq(context, db, flags, entry, R_FIRST);
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}
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static krb5_error_code
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DB_nextkey(krb5_context context, HDB *db, unsigned flags, hdb_entry_ex *entry)
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{
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return DB_seq(context, db, flags, entry, R_NEXT);
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}
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static krb5_error_code
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DB_rename(krb5_context context, HDB *db, const char *new_name)
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{
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int ret;
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char *old, *new;
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asprintf(&old, "%s.db", db->hdb_name);
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asprintf(&new, "%s.db", new_name);
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ret = rename(old, new);
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free(old);
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free(new);
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if(ret)
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return errno;
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free(db->hdb_name);
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db->hdb_name = strdup(new_name);
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return 0;
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}
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static krb5_error_code
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DB__get(krb5_context context, HDB *db, krb5_data key, krb5_data *reply)
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{
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DB *d = (DB*)db->hdb_db;
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DBT k, v;
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int code;
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k.data = key.data;
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k.size = key.length;
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code = db->hdb_lock(context, db, HDB_RLOCK);
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if(code)
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return code;
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code = (*d->get)(d, &k, &v, 0);
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db->hdb_unlock(context, db);
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if(code < 0) {
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code = errno;
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krb5_set_error_string(context, "Database %s get error: %s",
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db->hdb_name, strerror(code));
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return code;
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}
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if(code == 1) {
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krb5_clear_error_string(context);
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return HDB_ERR_NOENTRY;
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}
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krb5_data_copy(reply, v.data, v.size);
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return 0;
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}
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static krb5_error_code
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DB__put(krb5_context context, HDB *db, int replace,
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krb5_data key, krb5_data value)
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{
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DB *d = (DB*)db->hdb_db;
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DBT k, v;
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int code;
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k.data = key.data;
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k.size = key.length;
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v.data = value.data;
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v.size = value.length;
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code = db->hdb_lock(context, db, HDB_WLOCK);
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if(code)
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return code;
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code = (*d->put)(d, &k, &v, replace ? 0 : R_NOOVERWRITE);
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db->hdb_unlock(context, db);
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if(code < 0) {
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code = errno;
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krb5_set_error_string(context, "Database %s put error: %s",
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db->hdb_name, strerror(code));
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return code;
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}
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if(code == 1) {
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krb5_clear_error_string(context);
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return HDB_ERR_EXISTS;
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}
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return 0;
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}
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static krb5_error_code
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DB__del(krb5_context context, HDB *db, krb5_data key)
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{
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DB *d = (DB*)db->hdb_db;
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DBT k;
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krb5_error_code code;
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k.data = key.data;
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k.size = key.length;
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code = db->hdb_lock(context, db, HDB_WLOCK);
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if(code)
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return code;
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code = (*d->del)(d, &k, 0);
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db->hdb_unlock(context, db);
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if(code == 1) {
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code = errno;
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krb5_set_error_string(context, "Database %s put error: %s",
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db->hdb_name, strerror(code));
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return code;
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}
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if(code < 0)
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return errno;
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return 0;
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}
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static krb5_error_code
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DB_open(krb5_context context, HDB *db, int flags, mode_t mode)
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{
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char *fn;
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krb5_error_code ret;
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asprintf(&fn, "%s.db", db->hdb_name);
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if (fn == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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db->hdb_db = dbopen(fn, flags, mode, DB_BTREE, NULL);
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free(fn);
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/* try to open without .db extension */
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if(db->hdb_db == NULL && errno == ENOENT)
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db->hdb_db = dbopen(db->hdb_name, flags, mode, DB_BTREE, NULL);
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if(db->hdb_db == NULL) {
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ret = errno;
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krb5_set_error_string(context, "dbopen (%s): %s",
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db->hdb_name, strerror(ret));
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return ret;
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}
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if((flags & O_ACCMODE) == O_RDONLY)
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ret = hdb_check_db_format(context, db);
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else
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ret = hdb_init_db(context, db);
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if(ret == HDB_ERR_NOENTRY) {
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krb5_clear_error_string(context);
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return 0;
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}
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if (ret) {
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DB_close(context, db);
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krb5_set_error_string(context, "hdb_open: failed %s database %s",
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(flags & O_ACCMODE) == O_RDONLY ?
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"checking format of" : "initialize",
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db->hdb_name);
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}
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return ret;
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}
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krb5_error_code
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hdb_db_create(krb5_context context, HDB **db,
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const char *filename)
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{
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*db = calloc(1, sizeof(**db));
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if (*db == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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return ENOMEM;
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}
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(*db)->hdb_db = NULL;
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(*db)->hdb_name = strdup(filename);
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if ((*db)->hdb_name == NULL) {
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krb5_set_error_string(context, "malloc: out of memory");
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free(*db);
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*db = NULL;
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return ENOMEM;
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}
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(*db)->hdb_master_key_set = 0;
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(*db)->hdb_openp = 0;
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(*db)->hdb_open = DB_open;
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(*db)->hdb_close = DB_close;
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(*db)->hdb_fetch = _hdb_fetch;
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(*db)->hdb_store = _hdb_store;
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(*db)->hdb_remove = _hdb_remove;
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(*db)->hdb_firstkey = DB_firstkey;
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(*db)->hdb_nextkey= DB_nextkey;
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(*db)->hdb_lock = DB_lock;
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(*db)->hdb_unlock = DB_unlock;
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(*db)->hdb_rename = DB_rename;
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(*db)->hdb__get = DB__get;
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(*db)->hdb__put = DB__put;
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(*db)->hdb__del = DB__del;
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(*db)->hdb_destroy = DB_destroy;
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return 0;
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}
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#endif /* HAVE_DB1 */
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