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/*
* Copyright (C) 2008 Karel Zak <kzak@redhat.com>
*
* Inspired by libvolume_id by
* Kay Sievers <kay.sievers@vrfy.org>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <stdint.h>
#include "superblocks.h"
#define LUKS_CIPHERNAME_L 32
#define LUKS_CIPHERMODE_L 32
#define LUKS_HASHSPEC_L 32
#define LUKS_DIGESTSIZE 20
#define LUKS_SALTSIZE 32
#define LUKS_MAGIC_L 6
#define UUID_STRING_L 40
struct luks_phdr {
uint8_t magic[LUKS_MAGIC_L];
uint16_t version;
uint8_t cipherName[LUKS_CIPHERNAME_L];
uint8_t cipherMode[LUKS_CIPHERMODE_L];
uint8_t hashSpec[LUKS_HASHSPEC_L];
uint32_t payloadOffset;
uint32_t keyBytes;
uint8_t mkDigest[LUKS_DIGESTSIZE];
uint8_t mkDigestSalt[LUKS_SALTSIZE];
uint32_t mkDigestIterations;
uint8_t uuid[UUID_STRING_L];
} __attribute__((packed));
static int probe_luks(blkid_probe pr, const struct blkid_idmag *mag)
{
struct luks_phdr *header;
header = blkid_probe_get_sb(pr, mag, struct luks_phdr);
if (header == NULL)
return errno ? -errno : 1;
blkid_probe_strncpy_uuid(pr, (unsigned char *) header->uuid,
sizeof(header->uuid));
blkid_probe_sprintf_version(pr, "%u", be16_to_cpu(header->version));
return 0;
}
const struct blkid_idinfo luks_idinfo =
{
.name = "crypto_LUKS",
.usage = BLKID_USAGE_CRYPTO,
.probefunc = probe_luks,
.magics =
{
{ .magic = "LUKS\xba\xbe", .len = 6 },
{ NULL }
}
};
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