106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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File: luks.c
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Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "common.h"
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#include "luks.h"
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#include "fnctdsk.h"
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#include "log.h"
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#include "guid_cpy.h"
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static void set_LUKS_info(const struct luks_phdr *sb, partition_t *partition)
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{
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const unsigned int version=be16(sb->version);
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partition->upart_type=UP_LUKS;
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if(partition->part_size > 0)
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sprintf(partition->info,"LUKS %u", version);
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else
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sprintf(partition->info,"LUKS %u (Data size unknown)", version);
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}
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static int test_LUKS(const disk_t *disk_car, const struct luks_phdr *sb, const partition_t *partition, const int dump_ind)
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{
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static const uint8_t LUKS_MAGIC[LUKS_MAGIC_L] = {'L','U','K','S', 0xba, 0xbe};
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if(memcmp(sb->magic, LUKS_MAGIC, LUKS_MAGIC_L)!=0)
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return 1;
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if(dump_ind!=0)
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{
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if(partition!=NULL && disk_car!=NULL)
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log_info("\nLUKS magic value at %u/%u/%u\n",
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offset2cylinder(disk_car,partition->part_offset),
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offset2head(disk_car,partition->part_offset),
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offset2sector(disk_car,partition->part_offset));
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dump_log(sb,DEFAULT_SECTOR_SIZE);
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}
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return 0;
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}
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int check_LUKS(disk_t *disk_car,partition_t *partition)
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{
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unsigned char *buffer=(unsigned char*)MALLOC(DEFAULT_SECTOR_SIZE);
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if(disk_car->pread(disk_car, buffer, DEFAULT_SECTOR_SIZE, partition->part_offset) != DEFAULT_SECTOR_SIZE)
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{
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free(buffer);
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return 1;
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}
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if(test_LUKS(disk_car, (struct luks_phdr*)buffer, partition, 0)!=0)
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{
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free(buffer);
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return 1;
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}
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set_LUKS_info((struct luks_phdr*)buffer, partition);
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free(buffer);
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return 0;
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}
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int recover_LUKS(const disk_t *disk_car, const struct luks_phdr *sb,partition_t *partition,const int verbose, const int dump_ind)
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{
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if(test_LUKS(disk_car, sb, partition, dump_ind)!=0)
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return 1;
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if(partition==NULL)
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return 0;
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set_LUKS_info(sb, partition);
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partition->part_type_i386=P_LINUX;
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partition->part_type_mac=PMAC_LINUX;
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partition->part_type_sun=PSUN_LINUX;
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partition->part_type_gpt=GPT_ENT_TYPE_LINUX_DATA;
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partition->part_size=(uint64_t)be32(sb->payloadOffset)*disk_car->sector_size;
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partition->blocksize=0;
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partition->sborg_offset=0;
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partition->sb_offset=0;
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/* sb->uuid is bigger than part_uuid */
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guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb->uuid);
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if(verbose>0)
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{
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log_info("\n");
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}
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return 0;
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}
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