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

  • Committer: Bazaar Package Importer
  • Author(s): Scott James Remnant
  • Date: 2009-07-16 15:48:23 UTC
  • mfrom: (1.3.7 upstream)
  • Revision ID: james.westby@ubuntu.com-20090716154823-i26fshvs4v8h90qh
Tags: 2.16-1ubuntu1
https://launchpad.net/bugs/383697
* Merge from Debian, remaining changes:
  - Since udev is required in Ubuntu, the hwclock.sh init script is
    not called on startup and the hwclockfirst.sh init script is
    removed.
  - Remove /etc/adjtime on upgrade if it was not used.
  - Install custom blkid.conf to use /dev/.blkid.tab since we don't
    expect device names to survive a reboot
  - No lsb_release call in mount.preinst since we'd need Pre-Depends
    (LP: #383697).

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shlibs/blkid/src/probers/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 "blkidP.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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};
 
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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", le16_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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};