Class: Rex::PeParsey::PeBase

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/peparsey/pebase.rb

Direct Known Subclasses

Pe

Defined Under Namespace

Classes: ConfigHeader, DosHeader, ExportDirectory, ExportEntry, FileHeader, GenericHeader, GenericStruct, HeaderAccessor, ImportDescriptor, ImportEntry, OptionalHeader, OptionalHeader32, OptionalHeader64, RelocationDirectory, RelocationEntry, ResourceDirectory, ResourceEntry, RuntimeFunctionEntry, SectionHeader, TLSHeader, UnwindCode, UnwindInfo

Constant Summary collapse

IMAGE_DOS_SIGNATURE =

#define IMAGE_DOS_SIGNATURE 0x5A4D // MZ

0x5a4d
IMAGE_DOS_HEADER_SIZE =

typedef struct _IMAGE_DOS_HEADER { // DOS .EXE header

  WORD   e_magic;                     // Magic number
  WORD   e_cblp;                      // Bytes on last page of file
  WORD   e_cp;                        // Pages in file
  WORD   e_crlc;                      // Relocations
  WORD   e_cparhdr;                   // Size of header in paragraphs
  WORD   e_minalloc;                  // Minimum extra paragraphs needed
  WORD   e_maxalloc;                  // Maximum extra paragraphs needed
  WORD   e_ss;                        // Initial (relative) SS value
  WORD   e_sp;                        // Initial SP value
  WORD   e_csum;                      // Checksum
  WORD   e_ip;                        // Initial IP value
  WORD   e_cs;                        // Initial (relative) CS value
  WORD   e_lfarlc;                    // File address of relocation table
  WORD   e_ovno;                      // Overlay number
  WORD   e_res[4];                    // Reserved words
  WORD   e_oemid;                     // OEM identifier (for e_oeminfo)
  WORD   e_oeminfo;                   // OEM information; e_oemid specific
  WORD   e_res2[10];                  // Reserved words
  LONG   e_lfanew;                    // File address of new exe header
} IMAGE_DOS_HEADER, *PIMAGE_DOS_HEADER;

64
IMAGE_DOS_HEADER = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint16v', 'e_magic',     IMAGE_DOS_SIGNATURE ],
  [ 'uint16v', 'e_cblp',      0 ],
  [ 'uint16v', 'e_cp',        0 ],
  [ 'uint16v', 'e_crlc',      0 ],
  [ 'uint16v', 'e_cparhdr',   0 ],
  [ 'uint16v', 'e_minalloc',  0 ],
  [ 'uint16v', 'e_maxalloc',  0 ],
  [ 'uint16v', 'e_ss',        0 ],
  [ 'uint16v', 'e_sp',        0 ],
  [ 'uint16v', 'e_csum',      0 ],
  [ 'uint16v', 'e_ip',        0 ],
  [ 'uint16v', 'e_cs',        0 ],
  [ 'uint16v', 'e_lfarlc',    0 ],
  [ 'uint16v', 'e_ovno',      0 ],
  [ 'template', 'e_res', Rex::Struct2::CStructTemplate.new(
    [ 'uint16v', 'e_res_0', 0 ],
    [ 'uint16v', 'e_res_1', 0 ],
    [ 'uint16v', 'e_res_2', 0 ],
    [ 'uint16v', 'e_res_3', 0 ]
  )],
  [ 'uint16v', 'e_oemid',     0 ],
  [ 'uint16v', 'e_oeminfo',   0 ],
  [ 'template', 'e_res2', Rex::Struct2::CStructTemplate.new(
    [ 'uint16v', 'e_res2_0', 0 ],
    [ 'uint16v', 'e_res2_1', 0 ],
    [ 'uint16v', 'e_res2_2', 0 ],
    [ 'uint16v', 'e_res2_3', 0 ],
    [ 'uint16v', 'e_res2_4', 0 ],
    [ 'uint16v', 'e_res2_5', 0 ],
    [ 'uint16v', 'e_res2_6', 0 ],
    [ 'uint16v', 'e_res2_7', 0 ],
    [ 'uint16v', 'e_res2_8', 0 ],
    [ 'uint16v', 'e_res2_9', 0 ]
  )],
  [ 'uint32v', 'e_lfanew',    0 ]
)
IMAGE_NT_SIGNATURE =

typedef struct _IMAGE_FILE_HEADER 

WORD    Machine;
WORD    NumberOfSections;
DWORD   TimeDateStamp;
DWORD   PointerToSymbolTable;
DWORD   NumberOfSymbols;
WORD    SizeOfOptionalHeader;
WORD    Characteristics;

IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;

#define IMAGE_NT_SIGNATURE 0x00004550 // PE00 #define IMAGE_FILE_MACHINE_I386 0x014c // Intel 386. #define IMAGE_FILE_MACHINE_IA64 0x0200 // Intel 64 #define IMAGE_FILE_MACHINE_ALPHA64 0x0284 // ALPHA64 #define IMAGE_FILE_MACHINE_AMD64 0x8664 // AMD64 (K8) #define IMAGE_SIZEOF_FILE_HEADER 20

0x00004550
IMAGE_FILE_MACHINE_I386 = 
0x014c
IMAGE_FILE_MACHINE_IA64 = 
0x0200
IMAGE_FILE_MACHINE_ALPHA64 = 
0x0284
IMAGE_FILE_MACHINE_AMD64 = 
0x8664
IMAGE_FILE_HEADER_SIZE =

because we include the signature

20+4
IMAGE_FILE_HEADER = 
Rex::Struct2::CStructTemplate.new(
  # not really in the header, but easier for us this way
  [ 'uint32v', 'NtSignature',           0 ],
  [ 'uint16v', 'Machine',               0 ],
  [ 'uint16v', 'NumberOfSections',      0 ],
  [ 'uint32v', 'TimeDateStamp',         0 ],
  [ 'uint32v', 'PointerToSymbolTable',  0 ],
  [ 'uint32v', 'NumberOfSymbols',       0 ],
  [ 'uint16v', 'SizeOfOptionalHeader',  0 ],
  [ 'uint16v', 'Characteristics',       0 ]
)
SUPPORTED_MACHINES = 
[
	IMAGE_FILE_MACHINE_I386,
	IMAGE_FILE_MACHINE_IA64,
	IMAGE_FILE_MACHINE_ALPHA64,
	IMAGE_FILE_MACHINE_AMD64
]
IMAGE_ORDINAL_FLAG32 =

typedef struct _IMAGE_IMPORT_DESCRIPTOR {

union {
    DWORD   Characteristics;            // 0 for terminating null import descriptor
    DWORD   OriginalFirstThunk;         // RVA to original unbound IAT (PIMAGE_THUNK_DATA)
};
DWORD   TimeDateStamp;                  // 0 if not bound,
                                        // -1 if bound, and real date\time stamp
                                        //     in IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT (new BIND)
                                        // O.W. date/time stamp of DLL bound to (Old BIND)

DWORD   ForwarderChain;                 // -1 if no forwarders
DWORD   Name;
DWORD   FirstThunk;                     // RVA to IAT (if bound this IAT has actual addresses)

} IMAGE_IMPORT_DESCRIPTOR;

0x80000000
IMAGE_IMPORT_DESCRIPTOR_SIZE = 
20
IMAGE_IMPORT_DESCRIPTOR = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'OriginalFirstThunk',           0 ],
  [ 'uint32v', 'TimeDateStamp',                0 ],
  [ 'uint32v', 'ForwarderChain',               0 ],
  [ 'uint32v', 'Name',                         0 ],
  [ 'uint32v', 'FirstThunk',                   0 ]
)
IMAGE_EXPORT_DESCRIPTOR_SIZE =

typedef struct _IMAGE_EXPORT_DIRECTORY 

DWORD   Characteristics;
DWORD   TimeDateStamp;
WORD    MajorVersion;
WORD    MinorVersion;
DWORD   Name;
DWORD   Base;
DWORD   NumberOfFunctions;
DWORD   NumberOfNames;
DWORD   AddressOfFunctions;     // RVA from base of image
DWORD   AddressOfNames;         // RVA from base of image
DWORD   AddressOfNameOrdinals;  // RVA from base of image

IMAGE_EXPORT_DIRECTORY, *PIMAGE_EXPORT_DIRECTORY;

40
IMAGE_EXPORT_DESCRIPTOR = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'Characteristics',              0 ],
  [ 'uint32v', 'TimeDateStamp',                0 ],
  [ 'uint16v', 'MajorVersion',                 0 ],
  [ 'uint16v', 'MinorVersion',                 0 ],
  [ 'uint32v', 'Name',                         0 ],
  [ 'uint32v', 'Base',                         0 ],
  [ 'uint32v', 'NumberOfFunctions',            0 ],
  [ 'uint32v', 'NumberOfNames',                0 ],
  [ 'uint32v', 'AddressOfFunctions',           0 ],
  [ 'uint32v', 'AddressOfNames',               0 ],
  [ 'uint32v', 'AddressOfNameOrdinals',        0 ]
)
IMAGE_NUMBEROF_DIRECTORY_ENTRIES =

typedef struct _IMAGE_DATA_DIRECTORY 

DWORD   VirtualAddress;
DWORD   Size;

IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY;

16
IMAGE_DATA_DIRECTORY_SIZE = 
8
IMAGE_DIRECTORY_ENTRY_EXPORT = 
0
IMAGE_DIRECTORY_ENTRY_IMPORT = 
1
IMAGE_DIRECTORY_ENTRY_RESOURCE = 
2
IMAGE_DIRECTORY_ENTRY_EXCEPTION = 
3
IMAGE_DIRECTORY_ENTRY_SECURITY = 
4
IMAGE_DIRECTORY_ENTRY_BASERELOC = 
5
IMAGE_DIRECTORY_ENTRY_DEBUG = 
6
IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 
7
IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 
7
IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 
8
IMAGE_DIRECTORY_ENTRY_TLS = 
9
IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 
10
IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 
11
IMAGE_DIRECTORY_ENTRY_IAT = 
12
IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 
13
IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 
14
IMAGE_DATA_DIRECTORY = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'VirtualAddress',               0 ],
  [ 'uint32v', 'Size',                         0 ]
)
IMAGE_NT_OPTIONAL_HDR32_MAGIC =

typedef struct _IMAGE_OPTIONAL_HEADER 

//
// Standard fields.
//

WORD    Magic;
BYTE    MajorLinkerVersion;
BYTE    MinorLinkerVersion;
DWORD   SizeOfCode;
DWORD   SizeOfInitializedData;
DWORD   SizeOfUninitializedData;
DWORD   AddressOfEntryPoint;
DWORD   BaseOfCode;
DWORD   BaseOfData;

//
// NT additional fields.
//

DWORD   ImageBase;
DWORD   SectionAlignment;
DWORD   FileAlignment;
WORD    MajorOperatingSystemVersion;
WORD    MinorOperatingSystemVersion;
WORD    MajorImageVersion;
WORD    MinorImageVersion;
WORD    MajorSubsystemVersion;
WORD    MinorSubsystemVersion;
DWORD   Win32VersionValue;
DWORD   SizeOfImage;
DWORD   SizeOfHeaders;
DWORD   CheckSum;
WORD    Subsystem;
WORD    DllCharacteristics;
DWORD   SizeOfStackReserve;
DWORD   SizeOfStackCommit;
DWORD   SizeOfHeapReserve;
DWORD   SizeOfHeapCommit;
DWORD   LoaderFlags;
DWORD   NumberOfRvaAndSizes;
IMAGE_DATA_DIRECTORY DataDirectory[IMAGE_NUMBEROF_DIRECTORY_ENTRIES];

IMAGE_OPTIONAL_HEADER32, *PIMAGE_OPTIONAL_HEADER32;

#define IMAGE_NT_OPTIONAL_HDR32_MAGIC 0x10b #define IMAGE_SIZEOF_NT_OPTIONAL32_HEADER 224

0x10b
IMAGE_SIZEOF_NT_OPTIONAL32_HEADER = 
224
IMAGE_OPTIONAL_HEADER32 = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint16v', 'Magic',                        0 ],
  [ 'uint8',   'MajorLinkerVersion',           0 ],
  [ 'uint8',   'MinorLinkerVersion',           0 ],
  [ 'uint32v', 'SizeOfCode',                   0 ],
  [ 'uint32v', 'SizeOfInitializeData',         0 ],
  [ 'uint32v', 'SizeOfUninitializeData',       0 ],
  [ 'uint32v', 'AddressOfEntryPoint',          0 ],
  [ 'uint32v', 'BaseOfCode',                   0 ],
  [ 'uint32v', 'BaseOfData',                   0 ],
  [ 'uint32v', 'ImageBase',                    0 ],
  [ 'uint32v', 'SectionAlignment',             0 ],
  [ 'uint32v', 'FileAlignment',                0 ],
  [ 'uint16v', 'MajorOperatingSystemVersion',  0 ],
  [ 'uint16v', 'MinorOperatingSystemVersion',  0 ],
  [ 'uint16v', 'MajorImageVersion',            0 ],
  [ 'uint16v', 'MinorImageVersion',            0 ],
  [ 'uint16v', 'MajorSubsystemVersion',        0 ],
  [ 'uint16v', 'MinorSubsystemVersion',        0 ],
  [ 'uint32v', 'Win32VersionValue',            0 ],
  [ 'uint32v', 'SizeOfImage',                  0 ],
  [ 'uint32v', 'SizeOfHeaders',                0 ],
  [ 'uint32v', 'CheckSum',                     0 ],
  [ 'uint16v', 'Subsystem',                    0 ],
  [ 'uint16v', 'DllCharacteristics',           0 ],
  [ 'uint32v', 'SizeOfStackReserve',           0 ],
  [ 'uint32v', 'SizeOfStackCommit',            0 ],
  [ 'uint32v', 'SizeOfHeapReserve',            0 ],
  [ 'uint32v', 'SizeOfHeapCommit',             0 ],
  [ 'uint32v', 'LoaderFlags',                  0 ],
  [ 'uint32v', 'NumberOfRvaAndSizes',          0 ],
  [ 'template', 'DataDirectory', Rex::Struct2::CStructTemplate.new(
    [ 'template', 'DataDirectoryEntry_0', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_1', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_2', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_3', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_4', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_5', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_6', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_7', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_8', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_9', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_10', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_11', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_12', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_13', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_14', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_15', IMAGE_DATA_DIRECTORY ]
  )]
)
IMAGE_NT_OPTIONAL_HDR64_MAGIC =

typedef struct _IMAGE_OPTIONAL_HEADER64 { USHORT Magic; UCHAR MajorLinkerVersion; UCHAR MinorLinkerVersion; ULONG SizeOfCode; ULONG SizeOfInitializedData; ULONG SizeOfUninitializedData; ULONG AddressOfEntryPoint; ULONG BaseOfCode; ULONGLONG ImageBase; ULONG SectionAlignment; ULONG FileAlignment; USHORT MajorOperatingSystemVersion; USHORT MinorOperatingSystemVersion; USHORT MajorImageVersion; USHORT MinorImageVersion; USHORT MajorSubsystemVersion; USHORT MinorSubsystemVersion; ULONG Win32VersionValue; ULONG SizeOfImage; ULONG SizeOfHeaders; ULONG CheckSum; USHORT Subsystem; USHORT DllCharacteristics; ULONGLONG SizeOfStackReserve; ULONGLONG SizeOfStackCommit; ULONGLONG SizeOfHeapReserve; ULONGLONG SizeOfHeapCommit; ULONG LoaderFlags; ULONG NumberOfRvaAndSizes; IMAGE_DATA_DIRECTORY DataDirectory; } IMAGE_OPTIONAL_HEADER64, *PIMAGE_OPTIONAL_HEADER64;

#define IMAGE_NT_OPTIONAL_HDR64_MAGIC 0x20b #define IMAGE_SIZEOF_NT_OPTIONAL64_HEADER 240

0x20b
IMAGE_SIZEOF_NT_OPTIONAL64_HEADER = 
240
IMAGE_OPTIONAL_HEADER64 = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint16v', 'Magic',                        0 ],
  [ 'uint8',   'MajorLinkerVersion',           0 ],
  [ 'uint8',   'MinorLinkerVersion',           0 ],
  [ 'uint32v', 'SizeOfCode',                   0 ],
  [ 'uint32v', 'SizeOfInitializeData',         0 ],
  [ 'uint32v', 'SizeOfUninitializeData',       0 ],
  [ 'uint32v', 'AddressOfEntryPoint',          0 ],
  [ 'uint32v', 'BaseOfCode',                   0 ],
  [ 'uint64v', 'ImageBase',                    0 ],
  [ 'uint32v', 'SectionAlignment',             0 ],
  [ 'uint32v', 'FileAlignment',                0 ],
  [ 'uint16v', 'MajorOperatingsystemVersion',  0 ],
  [ 'uint16v', 'MinorOperatingsystemVersion',  0 ],
  [ 'uint16v', 'MajorImageVersion',            0 ],
  [ 'uint16v', 'MinorImageVersion',            0 ],
  [ 'uint16v', 'MajorSubsystemVersion',        0 ],
  [ 'uint16v', 'MinorSubsystemVersion',        0 ],
  [ 'uint32v', 'Win32VersionValue',            0 ],
  [ 'uint32v', 'SizeOfImage',                  0 ],
  [ 'uint32v', 'SizeOfHeaders',                0 ],
  [ 'uint32v', 'CheckSum',                     0 ],
  [ 'uint16v', 'Subsystem',                    0 ],
  [ 'uint16v', 'DllCharacteristics',           0 ],
  [ 'uint64v', 'SizeOfStackReserve',           0 ],
  [ 'uint64v', 'SizeOfStackCommit',            0 ],
  [ 'uint64v', 'SizeOfHeapReserve',            0 ],
  [ 'uint64v', 'SizeOfHeapCommit',             0 ],
  [ 'uint32v', 'LoaderFlags',                  0 ],
  [ 'uint32v', 'NumberOfRvaAndSizes',          0 ],
  [ 'template', 'DataDirectory', Rex::Struct2::CStructTemplate.new(
    [ 'template', 'DataDirectoryEntry_0', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_1', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_2', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_3', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_4', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_5', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_6', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_7', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_8', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_9', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_10', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_11', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_12', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_13', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_14', IMAGE_DATA_DIRECTORY ],
    [ 'template', 'DataDirectoryEntry_15', IMAGE_DATA_DIRECTORY ]
  )]
)
IMAGE_SIZEOF_SECTION_HEADER =

typedef struct _IMAGE_SECTION_HEADER {

BYTE    Name[IMAGE_SIZEOF_SHORT_NAME];
union {
        DWORD   PhysicalAddress;
        DWORD   VirtualSize;
} Misc;
DWORD   VirtualAddress;
DWORD   SizeOfRawData;
DWORD   PointerToRawData;
DWORD   PointerToRelocations;
DWORD   PointerToLinenumbers;
WORD    NumberOfRelocations;
WORD    NumberOfLinenumbers;
DWORD   Characteristics;

} IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER;

#define IMAGE_SIZEOF_SECTION_HEADER 40

40
IMAGE_SECTION_HEADER = 
Rex::Struct2::CStructTemplate.new(
  [ 'string',  'Name', 8,               '' ],
  [ 'uint32v', 'Misc',                   0 ],
  [ 'uint32v', 'VirtualAddress',         0 ],
  [ 'uint32v', 'SizeOfRawData',          0 ],
  [ 'uint32v', 'PointerToRawData',       0 ],
  [ 'uint32v', 'PointerToRelocations',   0 ],
  [ 'uint32v', 'NumberOfRelocations',    0 ],
  [ 'uint32v', 'NumberOfLineNumbers',    0 ],
  [ 'uint32v', 'Characteristics',        0 ]
)
IMAGE_SIZEOF_BASE_RELOCATION =

typedef struct _IMAGE_BASE_RELOCATION {

DWORD   VirtualAddress;
DWORD   SizeOfBlock;

// WORD TypeOffset; } IMAGE_BASE_RELOCATION; typedef IMAGE_BASE_RELOCATION UNALIGNED * PIMAGE_BASE_RELOCATION;

#define IMAGE_SIZEOF_BASE_RELOCATION 8

8
IMAGE_BASE_RELOCATION = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'VirtualAddress',         0 ],
  [ 'uint32v', 'SizeOfBlock',            0 ]
)
IMAGE_BASE_RELOCATION_TYPE_OFFSET = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint16v', 'TypeOffset',             0 ]
)
IMAGE_LOAD_CONFIG_DIRECTORY32 =

typedef struct 

DWORD   Size;
DWORD   TimeDateStamp;
WORD    MajorVersion;
WORD    MinorVersion;
DWORD   GlobalFlagsClear;
DWORD   GlobalFlagsSet;
DWORD   CriticalSectionDefaultTimeout;
DWORD   DeCommitFreeBlockThreshold;
DWORD   DeCommitTotalFreeThreshold;
DWORD   LockPrefixTable;            // VA
DWORD   MaximumAllocationSize;
DWORD   VirtualMemoryThreshold;
DWORD   ProcessHeapFlags;
DWORD   ProcessAffinityMask;
WORD    CSDVersion;
WORD    Reserved1;
DWORD   EditList;                   // VA
DWORD   SecurityCookie;             // VA
DWORD   SEHandlerTable;             // VA
DWORD   SEHandlerCount;

IMAGE_LOAD_CONFIG_DIRECTORY32, *PIMAGE_LOAD_CONFIG_DIRECTORY32;

Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'Size',                          0 ],
  [ 'uint32v', 'TimeDateStamp',                 0 ],
  [ 'uint16v', 'MajorVersion',                  0 ],
  [ 'uint16v', 'MinorVersion',                  0 ],
  [ 'uint32v', 'GlobalFlagsClear',              0 ],
  [ 'uint32v', 'GlobalFlagsSet',                0 ],
  [ 'uint32v', 'CriticalSectionDefaultTimeout', 0 ],
  [ 'uint32v', 'DeCommitFreeBlockThreshold',    0 ],
  [ 'uint32v', 'DeCommitTotalFreeThreshold',    0 ],
  [ 'uint32v', 'LockPrefixTable',               0 ],
  [ 'uint32v', 'MaximumAllocationSize',         0 ],
  [ 'uint32v', 'VirtualMemoryThreshold',        0 ],
  [ 'uint32v', 'ProcessHeapFlags',              0 ],
  [ 'uint32v', 'ProcessAffinityMask',           0 ],
  [ 'uint16v', 'CSDVersion',                    0 ],
  [ 'uint16v', 'Reserved1',                     0 ],
  [ 'uint32v', 'EditList',                      0 ],
  [ 'uint32v', 'SecurityCookie',                0 ],
  [ 'uint32v', 'SEHandlerTable',                0 ],
  [ 'uint32v', 'SEHandlerCount',                0 ]
)
IMAGE_LOAD_CONFIG_DIRECTORY64 =

typedef struct { ULONG Size; ULONG TimeDateStamp; USHORT MajorVersion; USHORT MinorVersion; ULONG GlobalFlagsClear; ULONG GlobalFlagsSet; ULONG CriticalSectionDefaultTimeout; ULONGLONG DeCommitFreeBlockThreshold; ULONGLONG DeCommitTotalFreeThreshold; ULONGLONG LockPrefixTable; // VA ULONGLONG MaximumAllocationSize; ULONGLONG VirtualMemoryThreshold; ULONGLONG ProcessAffinityMask; ULONG ProcessHeapFlags; USHORT CSDVersion; USHORT Reserved1; ULONGLONG EditList; // VA ULONGLONG SecurityCookie; // VA ULONGLONG SEHandlerTable; // VA ULONGLONG SEHandlerCount; } IMAGE_LOAD_CONFIG_DIRECTORY64, *PIMAGE_LOAD_CONFIG_DIRECTORY64;

Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'Size',                          0 ],
  [ 'uint32v', 'TimeDateStamp',                 0 ],
  [ 'uint16v', 'MajorVersion',                  0 ],
  [ 'uint16v', 'MinorVersion',                  0 ],
  [ 'uint32v', 'GlobalFlagsClear',              0 ],
  [ 'uint32v', 'GlobalFlagsSet',                0 ],
  [ 'uint32v', 'CriticalSectionDefaultTimeout', 0 ],
  [ 'uint64v', 'DeCommitFreeBlockThreshold',    0 ],
  [ 'uint64v', 'DeCommitTotalFreeThreshold',    0 ],
  [ 'uint64v', 'LockPrefixTable',               0 ],
  [ 'uint64v', 'MaximumAllocationSize',         0 ],
  [ 'uint64v', 'VirtualMemoryThreshold',        0 ],
  [ 'uint64v', 'ProcessAffinityMask',           0 ],
  [ 'uint32v', 'ProcessHeapFlags',              0 ],
  [ 'uint16v', 'CSDVersion',                    0 ],
  [ 'uint16v', 'Reserved1',                     0 ],
  [ 'uint64v', 'EditList',                      0 ],
  [ 'uint64v', 'SecurityCookie',                0 ],
  [ 'uint64v', 'SEHandlerTable',                0 ],
  [ 'uint64v', 'SEHandlerCount',                0 ]
)
IMAGE_LOAD_TLS_DIRECTORY32 =

typedef struct 

DWORD   Size;
DWORD   TimeDateStamp;
WORD    MajorVersion;
WORD    MinorVersion;
DWORD   GlobalFlagsClear;
DWORD   GlobalFlagsSet;
DWORD   CriticalSectionDefaultTimeout;
DWORD   DeCommitFreeBlockThreshold;
DWORD   DeCommitTotalFreeThreshold;
DWORD   LockPrefixTable;            // VA
DWORD   MaximumAllocationSize;
DWORD   VirtualMemoryThreshold;
DWORD   ProcessHeapFlags;
DWORD   ProcessAffinityMask;
WORD    CSDVersion;
WORD    Reserved1;
DWORD   EditList;                   // VA
DWORD   SecurityCookie;             // VA
DWORD   SEHandlerTable;             // VA
DWORD   SEHandlerCount;

IMAGE_LOAD_CONFIG_DIRECTORY32, *PIMAGE_LOAD_CONFIG_DIRECTORY32;

Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'Size',                          0 ],
  [ 'uint32v', 'TimeDateStamp',                 0 ],
  [ 'uint16v', 'MajorVersion',                  0 ],
  [ 'uint16v', 'MinorVersion',                  0 ],
  [ 'uint32v', 'GlobalFlagsClear',              0 ],
  [ 'uint32v', 'GlobalFlagsSet',                0 ],
  [ 'uint32v', 'CriticalSectionDefaultTimeout', 0 ],
  [ 'uint32v', 'DeCommitFreeBlockThreshold',    0 ],
  [ 'uint32v', 'DeCommitTotalFreeThreshold',    0 ],
  [ 'uint32v', 'LockPrefixTable',               0 ],
  [ 'uint32v', 'MaximumAllocationSize',         0 ],
  [ 'uint32v', 'VirtualMemoryThreshold',        0 ],
  [ 'uint32v', 'ProcessHeapFlags',              0 ],
  [ 'uint32v', 'ProcessAffinityMask',           0 ],
  [ 'uint16v', 'CSDVersion',                    0 ],
  [ 'uint16v', 'Reserved1',                     0 ],
  [ 'uint32v', 'EditList',                      0 ],
  [ 'uint32v', 'SecurityCookie',                0 ],
  [ 'uint32v', 'SEHandlerTable',                0 ],
  [ 'uint32v', 'SEHandlerCount',                0 ]
)
IMAGE_LOAD_TLS_DIRECTORY64 =

typedef struct { ULONG Size; ULONG TimeDateStamp; USHORT MajorVersion; USHORT MinorVersion; ULONG GlobalFlagsClear; ULONG GlobalFlagsSet; ULONG CriticalSectionDefaultTimeout; ULONGLONG DeCommitFreeBlockThreshold; ULONGLONG DeCommitTotalFreeThreshold; ULONGLONG LockPrefixTable; // VA ULONGLONG MaximumAllocationSize; ULONGLONG VirtualMemoryThreshold; ULONGLONG ProcessAffinityMask; ULONG ProcessHeapFlags; USHORT CSDVersion; USHORT Reserved1; ULONGLONG EditList; // VA ULONGLONG SecurityCookie; // VA ULONGLONG SEHandlerTable; // VA ULONGLONG SEHandlerCount; } IMAGE_LOAD_CONFIG_DIRECTORY64, *PIMAGE_LOAD_CONFIG_DIRECTORY64;

Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'Size',                          0 ],
  [ 'uint32v', 'TimeDateStamp',                 0 ],
  [ 'uint16v', 'MajorVersion',                  0 ],
  [ 'uint16v', 'MinorVersion',                  0 ],
  [ 'uint32v', 'GlobalFlagsClear',              0 ],
  [ 'uint32v', 'GlobalFlagsSet',                0 ],
  [ 'uint32v', 'CriticalSectionDefaultTimeout', 0 ],
  [ 'uint64v', 'DeCommitFreeBlockThreshold',    0 ],
  [ 'uint64v', 'DeCommitTotalFreeThreshold',    0 ],
  [ 'uint64v', 'LockPrefixTable',               0 ],
  [ 'uint64v', 'MaximumAllocationSize',         0 ],
  [ 'uint64v', 'VirtualMemoryThreshold',        0 ],
  [ 'uint64v', 'ProcessAffinityMask',           0 ],
  [ 'uint32v', 'ProcessHeapFlags',              0 ],
  [ 'uint16v', 'CSDVersion',                    0 ],
  [ 'uint16v', 'Reserved1',                     0 ],
  [ 'uint64v', 'EditList',                      0 ],
  [ 'uint64v', 'SecurityCookie',                0 ],
  [ 'uint64v', 'SEHandlerTable',                0 ],
  [ 'uint64v', 'SEHandlerCount',                0 ]
)
IMAGE_RUNTIME_FUNCTION_ENTRY_SZ =

typedef struct _IMAGE_RUNTIME_FUNCTION_ENTRY 

DWORD BeginAddress;
DWORD EndAddress;
DWORD UnwindInfoAddress;

_IMAGE_RUNTIME_FUNCTION_ENTRY, *_PIMAGE_RUNTIME_FUNCTION_ENTRY;

12
IMAGE_RUNTIME_FUNCTION_ENTRY = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint32v', 'BeginAddress',                  0 ],
  [ 'uint32v', 'EndAddress',                    0 ],
  [ 'uint32v', 'UnwindInfoAddress',             0 ]
)
UNWIND_INFO_HEADER_SZ = 
4
UNWIND_INFO_HEADER = 
Rex::Struct2::CStructTemplate.new(
  [ 'uint8', 'VersionFlags',                  0 ],
  [ 'uint8', 'SizeOfProlog',                  0 ],
  [ 'uint8', 'CountOfCodes',                  0 ],
  [ 'uint8', 'FrameRegisterAndOffset',        0 ]
)
UWOP_PUSH_NONVOL =

1 node

0
UWOP_ALLOC_LARGE =

2 or 3 nodes

1
UWOP_ALLOC_SMALL =

1 node

2
UWOP_SET_FPREG =

1 node

3
UWOP_SAVE_NONVOL =

2 nodes

4
UWOP_SAVE_NONVOL_FAR =

3 nodes

5
UWOP_SAVE_XMM128 =

2 nodes

8
UWOP_SAVE_XMM128_FAR =

3 nodes

9
UWOP_PUSH_MACHFRAME =

1 node

10
UNW_FLAG_EHANDLER = 
1
UNW_FLAG_UHANDLER = 
2
UNW_FLAG_CHAININFO = 
4

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#_config_header ⇒ Object

Returns the value of attribute _config_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _config_header
  @_config_header
end

#_dos_header ⇒ Object

Returns the value of attribute _dos_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _dos_header
  @_dos_header
end

#_exception_header ⇒ Object

Returns the value of attribute _exception_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _exception_header
  @_exception_header
end

#_exports_cache ⇒ Object

Returns the value of attribute _exports_cache.



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# File 'lib/rex/peparsey/pebase.rb', line 1169

def _exports_cache
  @_exports_cache
end

#_exports_cached ⇒ Object

Returns the value of attribute _exports_cached.



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# File 'lib/rex/peparsey/pebase.rb', line 1169

def _exports_cached
  @_exports_cached
end

#_file_header ⇒ Object

Returns the value of attribute _file_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _file_header
  @_file_header
end

#_imports_cache ⇒ Object

Returns the value of attribute _imports_cache.



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# File 'lib/rex/peparsey/pebase.rb', line 1168

def _imports_cache
  @_imports_cache
end

#_imports_cached ⇒ Object

Returns the value of attribute _imports_cached.



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# File 'lib/rex/peparsey/pebase.rb', line 1168

def _imports_cached
  @_imports_cached
end

#_isource ⇒ Object

instance stuff



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# File 'lib/rex/peparsey/pebase.rb', line 1162

def _isource
  @_isource
end

#_optional_header ⇒ Object

Returns the value of attribute _optional_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _optional_header
  @_optional_header
end

#_relocations_cache ⇒ Object

Returns the value of attribute _relocations_cache.



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# File 'lib/rex/peparsey/pebase.rb', line 1170

def _relocations_cache
  @_relocations_cache
end

#_relocations_cached ⇒ Object

Returns the value of attribute _relocations_cached.



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# File 'lib/rex/peparsey/pebase.rb', line 1170

def _relocations_cached
  @_relocations_cached
end

#_resources_cache ⇒ Object

Returns the value of attribute _resources_cache.



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# File 'lib/rex/peparsey/pebase.rb', line 1171

def _resources_cache
  @_resources_cache
end

#_resources_cached ⇒ Object

Returns the value of attribute _resources_cached.



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# File 'lib/rex/peparsey/pebase.rb', line 1171

def _resources_cached
  @_resources_cached
end

#_section_headers ⇒ Object

Returns the value of attribute _section_headers.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _section_headers
  @_section_headers
end

#_tls_header ⇒ Object

Returns the value of attribute _tls_header.



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# File 'lib/rex/peparsey/pebase.rb', line 1163

def _tls_header
  @_tls_header
end

#hdr ⇒ Object

Returns the value of attribute hdr.



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# File 'lib/rex/peparsey/pebase.rb', line 1173

def hdr
  @hdr
end

#header_section ⇒ Object

Returns the value of attribute header_section.



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# File 'lib/rex/peparsey/pebase.rb', line 1166

def header_section
  @header_section
end

#image_base ⇒ Object

Returns the value of attribute image_base.



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# File 'lib/rex/peparsey/pebase.rb', line 1166

def image_base
  @image_base
end

#sections ⇒ Object

Returns the value of attribute sections.



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# File 'lib/rex/peparsey/pebase.rb', line 1166

def sections
  @sections
end

Class Method Details

._align_offset(offset, alignment) ⇒ Object

Just a stupid routine to round an offset up to it’s alignment.

For example, you’re going to want this for FileAlignment and SectionAlignment, etc…



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# File 'lib/rex/peparsey/pebase.rb', line 1152

def self._align_offset(offset, alignment)
	offset += alignment - 1
	offset -= offset % alignment
	return offset
end

._parse_dos_header(rawdata) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 140

def self._parse_dos_header(rawdata)
	return DosHeader.new(rawdata)
end

._parse_file_header(rawdata) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 220

def self._parse_file_header(rawdata)
	return FileHeader.new(rawdata)
end

._parse_optional_header(rawdata) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 583

def self._parse_optional_header(rawdata)
	case rawdata.length
		# no optional header
		when 0
			return nil

		# good, good
		when IMAGE_SIZEOF_NT_OPTIONAL32_HEADER
			return OptionalHeader32.new(rawdata)

		when IMAGE_SIZEOF_NT_OPTIONAL64_HEADER
			return OptionalHeader64.new(rawdata)

		# bad, bad
		else
			raise OptionalHeaderError, "I don't know this header size, #{rawdata.length}", caller
	end

end

._parse_section_headers(rawdata) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 658

def self._parse_section_headers(rawdata)
	section_headers = [ ]
	size = IMAGE_SIZEOF_SECTION_HEADER
	numsections = rawdata.length / size

	numsections.times do |i|
		data = rawdata[i * size, size]
		section_headers << SectionHeader.new(data)
	end

	return section_headers
end

.new_from_file(filename, disk_backed = false) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1175

def self.new_from_file(filename, disk_backed = false)

	file = ::File.new(filename)
	file.binmode # windows... :\

	if disk_backed
		return self.new(ImageSource::Disk.new(file))
	else
		obj = new_from_string(file.read)
		file.close
		return obj
	end
end

.new_from_string(data) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1189

def self.new_from_string(data)
	return self.new(ImageSource::Memory.new(data))
end

Instance Method Details

#_find_section_by_rva(rva) ⇒ Object

Find a section by an RVA



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# File 'lib/rex/peparsey/pebase.rb', line 1253

def _find_section_by_rva(rva)
	all_sections.each do |section|
		if section.contains_rva?(rva)
			return section
		end
	end

	return nil
end

#_load_exception_directory ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1115

def _load_exception_directory
	@exception   = []
	
	exception_entry = _optional_header['DataDirectory'][IMAGE_DIRECTORY_ENTRY_EXCEPTION]
	rva             = exception_entry.v['VirtualAddress']
	size            = exception_entry.v['Size']
	
	return if (rva == 0)
	
	data = _isource.read(rva_to_file_offset(rva), size)
	
	case hdr.file.Machine
		when IMAGE_FILE_MACHINE_AMD64
			count = data.length / IMAGE_RUNTIME_FUNCTION_ENTRY_SZ
			
			count.times { |current|
				@exception << RuntimeFunctionEntry.new(self,
					data.slice!(0, IMAGE_RUNTIME_FUNCTION_ENTRY_SZ))
			}
		else
	end
	
	return @exception
end

#_load_exports ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1397

def _load_exports

	#
	# Get the data directory entry, size, etc
	#
	exports_entry = _optional_header['DataDirectory'][0]
	rva           = exports_entry.v['VirtualAddress']
	size          = exports_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#

	directory = IMAGE_EXPORT_DESCRIPTOR.make_struct
	directory.from_s(_isource.read(rva_to_file_offset(rva), IMAGE_EXPORT_DESCRIPTOR_SIZE))

	#
	# We can have nameless exports, so we need to do the whole
	# NumberOfFunctions NumberOfNames foo
	#
	num_functions = directory.v['NumberOfFunctions']
	num_names     = directory.v['NumberOfNames']

	dllname_rva   = directory.v['Name']
	dllname       = _isource.read_asciiz(rva_to_file_offset(dllname_rva))

	# FIXME Base, etc
	fun_off       = rva_to_file_offset(directory.v['AddressOfFunctions'])
	name_off      = rva_to_file_offset(directory.v['AddressOfNames'])
	ord_off       = rva_to_file_offset(directory.v['AddressOfNameOrdinals'])
	base          = directory.v['Base']

	# Allocate the list of names
	names = Array.new(num_functions)

	#
	# Iterate the names and name/ordinal list, getting the names
	# and storing them in the name list...
	#
	num_names.times do |i|
		name_rva = _isource.read(name_off + (i * 4), 4).unpack('V')[0]
		ordinal  = _isource.read(ord_off + (i * 2), 2).unpack('v')[0]
		name     = _isource.read_asciiz(rva_to_file_offset(name_rva))

		# store the exported name in the name list
		names[ordinal] = name
	end

	exports = ExportDirectory.new(dllname, [ ], base)

	#
	# Now just iterate the functions (rvas) list..
	#
	num_functions.times do |i|
		rva      = _isource.read(fun_off + (i * 4), 4).unpack('V')[0]

		# ExportEntry.new(name, ordinal, rva)
		exports.entries << ExportEntry.new(names[i], i + base, rva)
	end

	return exports
end

#_load_imports ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1326

def _load_imports
	#
	# Get the data directory entry, size, etc
	#
	imports_entry = _optional_header['DataDirectory'][1]
	rva           = imports_entry.v['VirtualAddress']
	size          = imports_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#

	imports = [ ]

	descriptors_data = _isource.read(rva_to_file_offset(rva), size)

	while descriptors_data.length >= IMAGE_IMPORT_DESCRIPTOR_SIZE
		descriptor = IMAGE_IMPORT_DESCRIPTOR.make_struct
		descriptor.from_s(descriptors_data)
		descriptors_data = descriptor.leftover

		othunk = descriptor.v['OriginalFirstThunk']
		fthunk = descriptor.v['FirstThunk']

		break if fthunk == 0

		dllname = _isource.read_asciiz(rva_to_file_offset(descriptor.v['Name']))

		import = ImportDescriptor.new(dllname, [ ])

		# we prefer the Characteristics/OriginalFirstThunk...
		thunk_off = rva_to_file_offset(othunk == 0 ? fthunk : othunk)

		while (orgrva = _isource.read(thunk_off, 4).unpack('V')[0]) != 0
			hint = nil
			name = nil

			if (orgrva & IMAGE_ORDINAL_FLAG32) != 0
				hint = orgrva & 0xffff
			else
				foff = rva_to_file_offset(orgrva)
				hint = _isource.read(foff, 2).unpack('v')[0]
				name = _isource.read_asciiz(foff + 2)
			end

			import.entries << ImportEntry.new(name, hint)

			thunk_off += 4
		end

		imports << import
	end

	return imports
end

#_load_relocations ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1473

def _load_relocations

	#
	# Get the data directory entry, size, etc
	#
	exports_entry = _optional_header['DataDirectory'][5]
	rva           = exports_entry.v['VirtualAddress']
	size          = exports_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#

	dirdata = _isource.read(rva_to_file_offset(rva), size)

	relocdirs = [ ]

	while dirdata.length >= IMAGE_SIZEOF_BASE_RELOCATION
		header = IMAGE_BASE_RELOCATION.make_struct
		header.from_s(dirdata)
		dirdata = header.leftover

		numrelocs = (header.v['SizeOfBlock'] - IMAGE_SIZEOF_BASE_RELOCATION) / 2

		relocbase = header.v['VirtualAddress']

		relocdir = RelocationDirectory.new(relocbase, [ ])

		numrelocs.times do
			reloc = IMAGE_BASE_RELOCATION_TYPE_OFFSET.make_struct
			reloc.from_s(dirdata)
			dirdata = reloc.leftover

			typeoffset = reloc.v['TypeOffset']

			relocrva  = relocbase + (typeoffset & 0xfff)
			reloctype = (typeoffset >> 12) & 0xf

			relocdir.entries << RelocationEntry.new(relocrva, reloctype)
		end

		relocdirs << relocdir
	end

	return relocdirs
end

#_load_resources ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1535

def _load_resources
	#
	# Get the data directory entry, size, etc
	#
	rsrc_entry = _optional_header['DataDirectory'][IMAGE_DIRECTORY_ENTRY_RESOURCE]
	rva        = rsrc_entry.v['VirtualAddress']
	size       = rsrc_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#
	data = _isource.read(rva_to_file_offset(rva), size)

	self._resources_cache = {}
	_parse_resource_directory(data)
end

#_parse_config_header ⇒ Object

doesn’t seem to be used – not compatible with 64-bit def self._parse_config_header(rawdata) header = IMAGE_LOAD_CONFIG_DIRECTORY32.make_struct header.from_s(rawdata) ConfigHeader.new(header) end



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# File 'lib/rex/peparsey/pebase.rb', line 847

def _parse_config_header

	#
	# Get the data directory entry, size, etc
	#
	exports_entry = _optional_header['DataDirectory'][IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG]
	rva           = exports_entry.v['VirtualAddress']
	size          = exports_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#

	dirdata = _isource.read(rva_to_file_offset(rva), size)
	klass   = (ptr_64?) ? IMAGE_LOAD_CONFIG_DIRECTORY64 : IMAGE_LOAD_CONFIG_DIRECTORY32
	header  = klass.make_struct

	header.from_s(dirdata)

	@config = ConfigHeader.new(header)
end

#_parse_resource_directory(data, rname = 0, rvalue = 0x80000000, path = '0', pname = nil) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1554

def _parse_resource_directory(data, rname=0, rvalue=0x80000000, path='0', pname=nil)

	pname = _parse_resource_name(data, rname)
	if (path.scan('/').length == 1)
		if (pname !~ /^\d+/)
			path = "/" + pname
		else
			path = "/" + _resource_lookup( (rname & ~0x80000000).to_s)
		end
	end


	rvalue &= ~0x80000000
	vals  = data[rvalue, 16].unpack('VVvvvv')

	chars = vals[0]
	tdate = vals[1]
	vers  = "#{vals[2]}#{vals[3]}"
	count = vals[4] + vals[5]

	0.upto(count-1) do |i|

		ename, evalue = data[rvalue + 16 + ( i * 8), 8].unpack('VV')
		epath = path + '/' + i.to_s

		if (ename & 0x80000000 != 0)
			pname = _parse_resource_name(data, ename)
		end

		if (evalue & 0x80000000 != 0)
			# This is a subdirectory
			_parse_resource_directory(data, ename, evalue, epath, pname)
		else
			# This is an entry
			_parse_resource_entry(data, ename, evalue, epath, pname)
		end
	end

end

#_parse_resource_entry(data, rname, rvalue, path, pname) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1626

def _parse_resource_entry(data, rname, rvalue, path, pname)

	rva, size, code = data[rvalue, 12].unpack('VVV')
	lang = _parse_resource_name(data, rname)

	ent = ResourceEntry.new(
		self,
		path,
		lang,
		code,
		rva,
		size,
		pname
	)
	self._resources_cache[path] = ent
end

#_parse_resource_name(data, rname) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1643

def _parse_resource_name(data, rname)
	if (rname & 0x80000000 != 0)
		rname &= ~0x80000000
		unistr = data[rname+2, 2 * data[rname,2].unpack('v')[0] ]
		unistr, trash = unistr.split(/\x00\x00/, 2)
		return unistr ? unistr.gsub(/\x00/, '') : nil
	end

	rname.to_s
end

#_parse_tls_header ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 980

def _parse_tls_header

	#
	# Get the data directory entry, size, etc
	#
	exports_entry = _optional_header['DataDirectory'][IMAGE_DIRECTORY_ENTRY_TLS]
	rva           = exports_entry.v['VirtualAddress']
	size          = exports_entry.v['Size']

	return nil if size == 0

	#
	# Ok, so we have the data directory, now lets parse it
	#

	dirdata = _isource.read(rva_to_file_offset(rva), size)
	klass   = (ptr_64?) ? IMAGE_LOAD_TLS_DIRECTORY64 : IMAGE_LOAD_TLS_DIRECTORY32
	header  = klass.make_struct

	header.from_s(dirdata)

	@tls = TLSHeader.new(header)
end

#_resource_lookup(i) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1594

def _resource_lookup(i)
	tbl = {
		'1'      => 'RT_CURSOR',
		'2'      => 'RT_BITMAP',
		'3'      => 'RT_ICON',
		'4'      => 'RT_MENU',
		'5'      => 'RT_DIALOG',
		'6'      => 'RT_STRING',
		'7'      => 'RT_FONTDIR',
		'8'      => 'RT_FONT',
		'9'      => 'RT_ACCELERATORS',
		'10'     => 'RT_RCDATA',
		'11'     => 'RT_MESSAGETABLE',
		'12'     => 'RT_GROUP_CURSOR',
		'14'     => 'RT_GROUP_ICON',
		'16'     => 'RT_VERSION',
		'17'     => 'RT_DLGINCLUDE',
		'19'     => 'RT_PLUGPLAY',
		'20'     => 'RT_VXD',
		'21'     => 'RT_ANICURSOR',
		'22'     => 'RT_ANIICON',
		'23'     => 'RT_HTML',
		'24'     => 'RT_MANIFEST',
		'32767'  => 'RT_ERROR',
		'8192'   => 'RT_NEWRESOURCE',
		'8194'   => 'RT_NEWBITMAP',
		'8196'   => 'RT_NEWMENU',
		'8197'   => 'RT_NEWDIALOG'
	}
	tbl[i] || i
end

#close ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1193

def close
	_isource.close
end

#config ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 872

def config
	_parse_config_header if @config.nil?
	@config
end

#exception ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1141

def exception
	_load_exception_directory if @exception.nil?
	@exception
end

#exports ⇒ Object

We lazily parse the exports, and then cache it



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# File 'lib/rex/peparsey/pebase.rb', line 1389

def exports
	if !_exports_cached
		self._exports_cache  = _load_exports
		self._exports_cached = true
	end
	return _exports_cache
end

#file_offset_to_rva(foffset) ⇒ Object

Raises:



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# File 'lib/rex/peparsey/pebase.rb', line 1224

def file_offset_to_rva(foffset)
	if foffset < 0
		raise WtfError, "lame", caller
	end

	all_sections.each do |section|
		if section.contains_file_offset?(foffset)
			return section.file_offset_to_rva(foffset)
		end
	end

	raise WtfError, "wtf! #{foffset}", caller
end

#file_offset_to_vma(foffset) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1238

def file_offset_to_vma(foffset)
	return rva_to_vma(file_offset_to_rva(foffset))
end

#find_section_by_rva(rva) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1262

def find_section_by_rva(rva)
	section = _find_section_by_rva(rva)

	if !section
		raise WtfError, "Cannot find rva! #{rva}", caller
	end

	return section
end

#find_section_by_vma(vma) ⇒ Object

Find a section by a VMA



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# File 'lib/rex/peparsey/pebase.rb', line 1275

def find_section_by_vma(vma)
	return find_section_by_rva(vma_to_rva(vma))
end

#imports ⇒ Object

We lazily parse the imports, and then cache it



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# File 'lib/rex/peparsey/pebase.rb', line 1318

def imports
	if !_imports_cached
		self._imports_cache  = _load_imports
		self._imports_cached = true
	end
	return _imports_cache
end

#read_asciiz_rva(rva) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1301

def read_asciiz_rva(rva)
	return find_section_by_rva(rva).read_asciiz_rva(rva)
end

#read_asciiz_vma(vma) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1305

def read_asciiz_vma(vma)
	return read_asciiz_rva(vma_to_rva(vma))
end

#read_rva(rva, length) ⇒ Object

Some convenient methods to read a vma/rva without having the section… (inefficent though I suppose…)



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# File 'lib/rex/peparsey/pebase.rb', line 1293

def read_rva(rva, length)
	return find_section_by_rva(rva).read_rva(rva, length)
end

#read_vma(vma, length) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1297

def read_vma(vma, length)
	return read_rva(vma_to_rva(vma), length)
end

#relocations ⇒ Object

Base relocations in the hizzy



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# File 'lib/rex/peparsey/pebase.rb', line 1465

def relocations
	if !_relocations_cached
		self._relocations_cache  = _load_relocations
		self._relocations_cached = true
	end
	return _relocations_cache
end

#resources ⇒ Object

We lazily parse the resources, and then cache them



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# File 'lib/rex/peparsey/pebase.rb', line 1526

def resources
	if !_resources_cached
		_load_resources
		self._resources_cached = true
	end

	return self._resources_cache
end

#rva_to_file_offset(rva) ⇒ Object

Raises:



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# File 'lib/rex/peparsey/pebase.rb', line 1211

def rva_to_file_offset(rva)
	all_sections.each do |section|
		if section.contains_rva?(rva)
			return section.rva_to_file_offset(rva)
		end
	end
	raise WtfError, "wtf!", caller
end

#rva_to_vma(rva) ⇒ Object

Random rva, vma, file offset, section offset, etc conversion routines…



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# File 'lib/rex/peparsey/pebase.rb', line 1203

def rva_to_vma(rva)
	return rva + image_base
end

#tls ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1005

def tls
	_parse_config_header if @tls.nil?
	@tls
end

#update_checksum ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1654

def update_checksum
	off = _dos_header.e_lfanew + IMAGE_FILE_HEADER_SIZE + 0x40
	_isource.rawdata[off, 4] = [0].pack('V')

	rem = _isource.size % 4
	sum_me = ''
	sum_me << _isource.rawdata
	sum_me << "\x00" * (4 - rem) if rem > 0

	cksum = 0
	sum_me.unpack('V*').each { |el|
		cksum = (cksum & 0xffffffff) + (cksum >> 32) + el
		if cksum > 2**32
			cksum = (cksum & 0xffffffff) + (cksum >> 32)
		end
	}

	cksum = (cksum & 0xffff) + (cksum >> 16)
	cksum += (cksum >> 16)
	cksum &= 0xffff

	cksum += _isource.size

	_isource.rawdata[off, 4] = [cksum].pack('V')
end

#valid_rva?(rva) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rex/peparsey/pebase.rb', line 1279

def valid_rva?(rva)
	_find_section_by_rva(rva) != nil
end

#valid_vma?(vma) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rex/peparsey/pebase.rb', line 1282

def valid_vma?(vma)
	_find_section_by_rva(vma_to_rva(vma)) != nil
end

#vma_to_file_offset(vma) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1220

def vma_to_file_offset(vma)
	return rva_to_file_offset(vma_to_rva(vma))
end

#vma_to_rva(vma) ⇒ Object 



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# File 'lib/rex/peparsey/pebase.rb', line 1207

def vma_to_rva(vma)
	return vma - image_base
end