mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-11-01 09:21:11 +03:00
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
|
|
* volume_id - reads filesystem label and uuid
|
|
*
|
|
* Copyright (C) 2005 W. Michael Petullo <mike@flyn.org>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _GNU_SOURCE
|
|
#define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
|
|
#include "libvolume_id.h"
|
|
#include "libvolume_id-private.h"
|
|
|
|
#define SECTOR_SHIFT 9
|
|
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
|
|
|
|
#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_NUMKEYS 8
|
|
|
|
#define LUKS_MAGIC_L 6
|
|
#define LUKS_PHDR_SIZE (sizeof(struct luks_phdr)/SECTOR_SIZE+1)
|
|
#define UUID_STRING_L 40
|
|
static const uint8_t LUKS_MAGIC[] = {'L','U','K','S', 0xba, 0xbe};
|
|
|
|
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];
|
|
struct {
|
|
uint32_t active;
|
|
uint32_t passwordIterations;
|
|
uint8_t passwordSalt[LUKS_SALTSIZE];
|
|
uint32_t keyMaterialOffset;
|
|
uint32_t stripes;
|
|
} keyblock[LUKS_NUMKEYS];
|
|
};
|
|
|
|
int volume_id_probe_luks(struct volume_id *id, uint64_t off, uint64_t size)
|
|
{
|
|
struct luks_phdr *header;
|
|
|
|
header = (struct luks_phdr*) volume_id_get_buffer(id, off, LUKS_PHDR_SIZE);
|
|
if (header == NULL)
|
|
return -1;
|
|
|
|
if (memcmp(header->magic, LUKS_MAGIC, LUKS_MAGIC_L))
|
|
return -1;
|
|
|
|
volume_id_set_usage(id, VOLUME_ID_CRYPTO);
|
|
volume_id_set_uuid(id, header->uuid, 36, UUID_HEX_STRING);
|
|
snprintf(id->type_version, sizeof(header->version), "%u", le16_to_cpu(header->version));
|
|
id->type = "crypto_LUKS";
|
|
return 0;
|
|
}
|