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