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174 lines
6.5 KiB
174 lines
6.5 KiB
/*
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* Copyright (C) 2015 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2008 Sourcefire, Inc.
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*
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* Authors: Alberto Wu, Tomasz Kojm
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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 __PE_H
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#define __PE_H
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#include "clamav.h"
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#include "execs.h"
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#include "others.h"
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#include "cltypes.h"
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#include "fmap.h"
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#include "bcfeatures.h"
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/** @file */
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/** Header for this PE file
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\group_pe */
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struct pe_image_file_hdr {
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uint32_t Magic; /**< PE magic header: PE\\0\\0 */
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uint16_t Machine;/**< CPU this executable runs on, see libclamav/pe.c for possible values */
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uint16_t NumberOfSections;/**< Number of sections in this executable */
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uint32_t TimeDateStamp; /**< Unreliable */
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uint32_t PointerToSymbolTable; /**< debug */
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uint32_t NumberOfSymbols; /**< debug */
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uint16_t SizeOfOptionalHeader; /**< == 224 */
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uint16_t Characteristics;
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};
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/** PE data directory header
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\group_pe */
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struct pe_image_data_dir {
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uint32_t VirtualAddress;
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uint32_t Size;
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};
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/** 32-bit PE optional header
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\group_pe */
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struct pe_image_optional_hdr32 {
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uint16_t Magic;
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uint8_t MajorLinkerVersion; /**< unreliable */
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uint8_t MinorLinkerVersion; /**< unreliable */
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uint32_t SizeOfCode; /**< unreliable */
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uint32_t SizeOfInitializedData; /**< unreliable */
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uint32_t SizeOfUninitializedData; /**< unreliable */
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uint32_t AddressOfEntryPoint;
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uint32_t BaseOfCode;
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uint32_t BaseOfData;
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uint32_t ImageBase; /**< multiple of 64 KB */
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uint32_t SectionAlignment; /**< usually 32 or 4096 */
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uint32_t FileAlignment; /**< usually 32 or 512 */
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uint16_t MajorOperatingSystemVersion; /**< not used */
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uint16_t MinorOperatingSystemVersion; /**< not used */
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uint16_t MajorImageVersion; /**< unreliable */
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uint16_t MinorImageVersion; /**< unreliable */
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uint16_t MajorSubsystemVersion;
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uint16_t MinorSubsystemVersion;
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uint32_t Win32VersionValue; /*< ? */
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uint32_t SizeOfImage;
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uint32_t SizeOfHeaders;
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uint32_t CheckSum; /**< NT drivers only */
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uint16_t Subsystem;
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uint16_t DllCharacteristics;
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uint32_t SizeOfStackReserve;
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uint32_t SizeOfStackCommit;
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uint32_t SizeOfHeapReserve;
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uint32_t SizeOfHeapCommit;
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uint32_t LoaderFlags; /*< ? */
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uint32_t NumberOfRvaAndSizes; /**< unreliable */
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struct pe_image_data_dir DataDirectory[16];
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};
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/** PE 64-bit optional header
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\group_pe */
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struct pe_image_optional_hdr64 {
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uint16_t Magic;
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uint8_t MajorLinkerVersion; /**< unreliable */
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uint8_t MinorLinkerVersion; /**< unreliable */
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uint32_t SizeOfCode; /**< unreliable */
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uint32_t SizeOfInitializedData; /**< unreliable */
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uint32_t SizeOfUninitializedData; /**< unreliable */
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uint32_t AddressOfEntryPoint;
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uint32_t BaseOfCode;
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uint64_t ImageBase; /**< multiple of 64 KB */
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uint32_t SectionAlignment; /**< usually 32 or 4096 */
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uint32_t FileAlignment; /**< usually 32 or 512 */
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uint16_t MajorOperatingSystemVersion; /**< not used */
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uint16_t MinorOperatingSystemVersion; /**< not used */
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uint16_t MajorImageVersion; /**< unreliable */
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uint16_t MinorImageVersion; /**< unreliable */
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uint16_t MajorSubsystemVersion;
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uint16_t MinorSubsystemVersion;
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uint32_t Win32VersionValue; /* ? */
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uint32_t SizeOfImage;
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uint32_t SizeOfHeaders;
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uint32_t CheckSum; /**< NT drivers only */
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uint16_t Subsystem;
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uint16_t DllCharacteristics;
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uint64_t SizeOfStackReserve;
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uint64_t SizeOfStackCommit;
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uint64_t SizeOfHeapReserve;
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uint64_t SizeOfHeapCommit;
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uint32_t LoaderFlags; /* ? */
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uint32_t NumberOfRvaAndSizes; /**< unreliable */
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struct pe_image_data_dir DataDirectory[16];
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};
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/** PE section header
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\group_pe */
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struct pe_image_section_hdr {
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uint8_t Name[8]; /**< may not end with NULL */
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/*
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union {
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uint32_t PhysicalAddress;
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uint32_t VirtualSize;
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} AddrSize;
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*/
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uint32_t VirtualSize;
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uint32_t VirtualAddress;
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uint32_t SizeOfRawData; /**< multiple of FileAlignment */
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uint32_t PointerToRawData; /**< offset to the section's data */
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uint32_t PointerToRelocations; /**< object files only */
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uint32_t PointerToLinenumbers; /**< object files only */
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uint16_t NumberOfRelocations; /**< object files only */
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uint16_t NumberOfLinenumbers; /**< object files only */
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uint32_t Characteristics;
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};
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/** Data for the bytecode PE hook
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\group_pe */
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struct cli_pe_hook_data {
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uint32_t offset;
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uint32_t ep; /**< EntryPoint as file offset */
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uint16_t nsections;/**< Number of sections */
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uint16_t dummy; /* align */
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struct pe_image_file_hdr file_hdr;/**< Header for this PE file */
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struct pe_image_optional_hdr32 opt32; /**< 32-bit PE optional header */
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uint32_t dummy2; /* align */
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struct pe_image_optional_hdr64 opt64;/**< 64-bit PE optional header */
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struct pe_image_data_dir dirs[16]; /**< PE data directory header */
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uint32_t e_lfanew;/**< address of new exe header */
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uint32_t overlays;/**< number of overlays */
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int32_t overlays_sz;/**< size of overlays */
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uint32_t hdr_size;/**< internally needed by rawaddr */
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};
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int cli_scanpe(cli_ctx *ctx);
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#define CL_CHECKFP_PE_FLAG_NONE 0x00000000
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#define CL_CHECKFP_PE_FLAG_STATS 0x00000001
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#define CL_CHECKFP_PE_FLAG_AUTHENTICODE 0x00000002
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int cli_peheader(fmap_t *map, struct cli_exe_info *peinfo);
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int cli_checkfp_pe(cli_ctx *ctx, uint8_t *authsha1, stats_section_t *hashes, uint32_t flags);
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uint32_t cli_rawaddr(uint32_t, const struct cli_exe_section *, uint16_t, unsigned int *, size_t, uint32_t);
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void findres(uint32_t, uint32_t, uint32_t, fmap_t *map, struct cli_exe_section *, uint16_t, uint32_t, int (*)(void *, uint32_t, uint32_t, uint32_t, uint32_t), void *);
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#endif
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