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Viewing changes to shlibs/blkid/src/superblocks/luks.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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shlibs/blkid/src/superblocks/luks.c
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/*
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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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};