| /* |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 *offset_found) |
| { |
| char buf[LUKS_SIGNATURE_SIZE]; |
| int ret = -1; |
| |
| if (!dev_open_readonly(dev)) { |
| stack; |
| return -1; |
| } |
| |
| if (offset_found) |
| *offset_found = 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; |
| } |