93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
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* Copyright (C) 2014-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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*
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* Authors: Kevin Lin <klin@sourcefire.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef __MBR_H
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#define __MBR_H
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include "clamav-types.h"
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#include "others.h"
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#define MBR_SECTOR_SIZE 512
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#define MBR_MAX_PARTITION_ENTRIES 4
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#define CL_MAX_LOGICAL_PARTITIONS 50
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#define MBR_SIGNATURE 0x55aa
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#define MBR_SECTOR 0
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/* MBR Status */
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#define MBR_STATUS_INACTIVE 0x00
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/* other values are invalid status */
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#define MBR_STATUS_ACTIVE 0x80
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/* End MBR Status */
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/* MBR Partition Types */
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#define MBR_EMPTY 0x00
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#define MBR_EXTENDED 0x05
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#define MBR_HYBRID 0xed
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#define MBR_PROTECTIVE 0xee
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/* End Partition Types */
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#ifndef HAVE_ATTRIB_PACKED
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#define __attribute__(x)
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#endif
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack(1)
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack 1
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#endif
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/* 16-byte MBR partition entry, little-endian */
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struct mbr_partition_entry {
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uint8_t status; /* 0x80 = active, 0x00 = inactive */
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uint8_t firstCHS[3];
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uint8_t type;
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uint8_t lastCHS[3];
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uint32_t firstLBA __attribute__((packed));
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uint32_t numLBA __attribute__((packed));
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};
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struct mbr_boot_record {
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/* 446 bytes of reserved, implementation-based data */
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struct mbr_partition_entry entries[4];
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uint16_t signature __attribute__((packed));
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};
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#ifdef HAVE_PRAGMA_PACK
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#pragma pack()
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#endif
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#ifdef HAVE_PRAGMA_PACK_HPPA
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#pragma pack
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#endif
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cl_error_t cli_mbr_check(const unsigned char *buff, size_t len, size_t maplen);
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cl_error_t cli_mbr_check2(cli_ctx *ctx, size_t sectorsize);
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cl_error_t cli_scanmbr(cli_ctx *ctx, size_t sectorsize);
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void mbr_convert_to_host(struct mbr_boot_record *record);
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#endif
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