/* * Copyright (C) 2010 Red Hat, Inc. All rights reserved. * * This file is part of LVM2. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU Lesser General Public License v.2.1. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "lib.h" #include "dev-type.h" #define LUKS_SIGNATURE "LUKS\xba\xbe" #define LUKS_SIGNATURE_SIZE 6 int dev_is_luks(struct device *dev, uint64_t *signature) { char buf[LUKS_SIGNATURE_SIZE]; int ret = -1; if (!dev_open_readonly(dev)) { stack; return -1; } *signature = 0; if (!dev_read(dev, 0, LUKS_SIGNATURE_SIZE, buf)) goto_out; ret = memcmp(buf, LUKS_SIGNATURE, LUKS_SIGNATURE_SIZE) ? 0 : 1; out: if (!dev_close(dev)) stack; return ret; }