100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
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/*
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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 __GPT_H
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#define __GPT_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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/* GPT sector size is normally 512 bytes be can be set to much larger
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* values. Sector size for GPT can be found by the offset the GPT header
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* signature is located (marking the beginning of the second sector.
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*/
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#define GPT_SIGNATURE 0x4546492050415254ULL
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#define GPT_SIGNATURE_STR "EFI PART"
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#define GPT_PRIMARY_HDR_LBA 1
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#define GPT_HDR_RESERVED 0
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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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/* 92-byte gpt_header, these are little endian */
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struct gpt_header {
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uint64_t signature __attribute__((packed));
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uint32_t revision __attribute__((packed));
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uint32_t headerSize __attribute__((packed)); /* should be 92 bytes */
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uint32_t headerCRC32 __attribute__((packed));
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uint32_t reserved __attribute__((packed)); /* this MUST be zero */
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/* LBA values should be 1 and the last sector index */
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uint64_t currentLBA __attribute__((packed));
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uint64_t backupLBA __attribute__((packed));
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/* data not including the gpt_header and partition table */
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uint64_t firstUsableLBA __attribute__((packed));
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uint64_t lastUsableLBA __attribute__((packed));
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uint8_t DiskGUID[16];
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/* partition table information */
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uint64_t tableStartLBA __attribute__((packed));
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uint32_t tableNumEntries __attribute__((packed));
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uint32_t tableEntrySize __attribute__((packed));
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uint32_t tableCRC32 __attribute__((packed));
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/* zeroes fill remainder of sector (420 bytes in 512 sector size) */
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};
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/* 128-byte partition entry, part of an array of 128+ entries, in little_endian */
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struct gpt_partition_entry {
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uint8_t typeGUID[16];
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uint8_t uniqueGUID[16];
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uint64_t firstLBA __attribute__((packed));
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uint64_t lastLBA __attribute__((packed));
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uint64_t attributes __attribute__((packed));
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uint16_t name[36] __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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size_t gpt_detect_size(fmap_t *map);
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int cli_scangpt(cli_ctx *ctx, size_t sectorsize);
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#endif
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