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path: root/tun/wintun/memmod/syscall_windows.go
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Diffstat (limited to 'tun/wintun/memmod/syscall_windows.go')
-rw-r--r--tun/wintun/memmod/syscall_windows.go343
1 files changed, 343 insertions, 0 deletions
diff --git a/tun/wintun/memmod/syscall_windows.go b/tun/wintun/memmod/syscall_windows.go
new file mode 100644
index 0000000..beae415
--- /dev/null
+++ b/tun/wintun/memmod/syscall_windows.go
@@ -0,0 +1,343 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2020 WireGuard LLC. All Rights Reserved.
+ */
+
+package memmod
+
+import "unsafe"
+
+const (
+ IMAGE_DOS_SIGNATURE = 0x5A4D // MZ
+ IMAGE_OS2_SIGNATURE = 0x454E // NE
+ IMAGE_OS2_SIGNATURE_LE = 0x454C // LE
+ IMAGE_VXD_SIGNATURE = 0x454C // LE
+ IMAGE_NT_SIGNATURE = 0x00004550 // PE00
+)
+
+// DOS .EXE header
+type IMAGE_DOS_HEADER struct {
+ E_magic uint16 // Magic number
+ E_cblp uint16 // Bytes on last page of file
+ E_cp uint16 // Pages in file
+ E_crlc uint16 // Relocations
+ E_cparhdr uint16 // Size of header in paragraphs
+ E_minalloc uint16 // Minimum extra paragraphs needed
+ E_maxalloc uint16 // Maximum extra paragraphs needed
+ E_ss uint16 // Initial (relative) SS value
+ E_sp uint16 // Initial SP value
+ E_csum uint16 // Checksum
+ E_ip uint16 // Initial IP value
+ E_cs uint16 // Initial (relative) CS value
+ E_lfarlc uint16 // File address of relocation table
+ E_ovno uint16 // Overlay number
+ E_res [4]uint16 // Reserved words
+ E_oemid uint16 // OEM identifier (for e_oeminfo)
+ E_oeminfo uint16 // OEM information; e_oemid specific
+ E_res2 [10]uint16 // Reserved words
+ E_lfanew int32 // File address of new exe header
+}
+
+// File header format
+type IMAGE_FILE_HEADER struct {
+ Machine uint16
+ NumberOfSections uint16
+ TimeDateStamp uint32
+ PointerToSymbolTable uint32
+ NumberOfSymbols uint32
+ SizeOfOptionalHeader uint16
+ Characteristics uint16
+}
+
+const (
+ IMAGE_SIZEOF_FILE_HEADER = 20
+
+ IMAGE_FILE_RELOCS_STRIPPED = 0x0001 // Relocation info stripped from file.
+ IMAGE_FILE_EXECUTABLE_IMAGE = 0x0002 // File is executable (i.e. no unresolved external references).
+ IMAGE_FILE_LINE_NUMS_STRIPPED = 0x0004 // Line nunbers stripped from file.
+ IMAGE_FILE_LOCAL_SYMS_STRIPPED = 0x0008 // Local symbols stripped from file.
+ IMAGE_FILE_AGGRESIVE_WS_TRIM = 0x0010 // Aggressively trim working set
+ IMAGE_FILE_LARGE_ADDRESS_AWARE = 0x0020 // App can handle >2gb addresses
+ IMAGE_FILE_BYTES_REVERSED_LO = 0x0080 // Bytes of machine word are reversed.
+ IMAGE_FILE_32BIT_MACHINE = 0x0100 // 32 bit word machine.
+ IMAGE_FILE_DEBUG_STRIPPED = 0x0200 // Debugging info stripped from file in .DBG file
+ IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 0x0400 // If Image is on removable media, copy and run from the swap file.
+ IMAGE_FILE_NET_RUN_FROM_SWAP = 0x0800 // If Image is on Net, copy and run from the swap file.
+ IMAGE_FILE_SYSTEM = 0x1000 // System File.
+ IMAGE_FILE_DLL = 0x2000 // File is a DLL.
+ IMAGE_FILE_UP_SYSTEM_ONLY = 0x4000 // File should only be run on a UP machine
+ IMAGE_FILE_BYTES_REVERSED_HI = 0x8000 // Bytes of machine word are reversed.
+
+ IMAGE_FILE_MACHINE_UNKNOWN = 0
+ IMAGE_FILE_MACHINE_TARGET_HOST = 0x0001 // Useful for indicating we want to interact with the host and not a WoW guest.
+ IMAGE_FILE_MACHINE_I386 = 0x014c // Intel 386.
+ IMAGE_FILE_MACHINE_R3000 = 0x0162 // MIPS little-endian, 0x160 big-endian
+ IMAGE_FILE_MACHINE_R4000 = 0x0166 // MIPS little-endian
+ IMAGE_FILE_MACHINE_R10000 = 0x0168 // MIPS little-endian
+ IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x0169 // MIPS little-endian WCE v2
+ IMAGE_FILE_MACHINE_ALPHA = 0x0184 // Alpha_AXP
+ IMAGE_FILE_MACHINE_SH3 = 0x01a2 // SH3 little-endian
+ IMAGE_FILE_MACHINE_SH3DSP = 0x01a3
+ IMAGE_FILE_MACHINE_SH3E = 0x01a4 // SH3E little-endian
+ IMAGE_FILE_MACHINE_SH4 = 0x01a6 // SH4 little-endian
+ IMAGE_FILE_MACHINE_SH5 = 0x01a8 // SH5
+ IMAGE_FILE_MACHINE_ARM = 0x01c0 // ARM Little-Endian
+ IMAGE_FILE_MACHINE_THUMB = 0x01c2 // ARM Thumb/Thumb-2 Little-Endian
+ IMAGE_FILE_MACHINE_ARMNT = 0x01c4 // ARM Thumb-2 Little-Endian
+ IMAGE_FILE_MACHINE_AM33 = 0x01d3
+ IMAGE_FILE_MACHINE_POWERPC = 0x01F0 // IBM PowerPC Little-Endian
+ IMAGE_FILE_MACHINE_POWERPCFP = 0x01f1
+ IMAGE_FILE_MACHINE_IA64 = 0x0200 // Intel 64
+ IMAGE_FILE_MACHINE_MIPS16 = 0x0266 // MIPS
+ IMAGE_FILE_MACHINE_ALPHA64 = 0x0284 // ALPHA64
+ IMAGE_FILE_MACHINE_MIPSFPU = 0x0366 // MIPS
+ IMAGE_FILE_MACHINE_MIPSFPU16 = 0x0466 // MIPS
+ IMAGE_FILE_MACHINE_AXP64 = IMAGE_FILE_MACHINE_ALPHA64
+ IMAGE_FILE_MACHINE_TRICORE = 0x0520 // Infineon
+ IMAGE_FILE_MACHINE_CEF = 0x0CEF
+ IMAGE_FILE_MACHINE_EBC = 0x0EBC // EFI Byte Code
+ IMAGE_FILE_MACHINE_AMD64 = 0x8664 // AMD64 (K8)
+ IMAGE_FILE_MACHINE_M32R = 0x9041 // M32R little-endian
+ IMAGE_FILE_MACHINE_ARM64 = 0xAA64 // ARM64 Little-Endian
+ IMAGE_FILE_MACHINE_CEE = 0xC0EE
+)
+
+// Directory format
+type IMAGE_DATA_DIRECTORY struct {
+ VirtualAddress uint32
+ Size uint32
+}
+
+const IMAGE_NUMBEROF_DIRECTORY_ENTRIES = 16
+
+type IMAGE_NT_HEADERS struct {
+ Signature uint32
+ FileHeader IMAGE_FILE_HEADER
+ OptionalHeader IMAGE_OPTIONAL_HEADER
+}
+
+func (ntheader *IMAGE_NT_HEADERS) Sections() []IMAGE_SECTION_HEADER {
+ return (*[0xffff]IMAGE_SECTION_HEADER)(unsafe.Pointer(
+ (uintptr)(unsafe.Pointer(ntheader)) +
+ unsafe.Offsetof(ntheader.OptionalHeader) +
+ uintptr(ntheader.FileHeader.SizeOfOptionalHeader)))[:ntheader.FileHeader.NumberOfSections]
+}
+
+const (
+ IMAGE_DIRECTORY_ENTRY_EXPORT = 0 // Export Directory
+ IMAGE_DIRECTORY_ENTRY_IMPORT = 1 // Import Directory
+ IMAGE_DIRECTORY_ENTRY_RESOURCE = 2 // Resource Directory
+ IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3 // Exception Directory
+ IMAGE_DIRECTORY_ENTRY_SECURITY = 4 // Security Directory
+ IMAGE_DIRECTORY_ENTRY_BASERELOC = 5 // Base Relocation Table
+ IMAGE_DIRECTORY_ENTRY_DEBUG = 6 // Debug Directory
+ IMAGE_DIRECTORY_ENTRY_COPYRIGHT = 7 // (X86 usage)
+ IMAGE_DIRECTORY_ENTRY_ARCHITECTURE = 7 // Architecture Specific Data
+ IMAGE_DIRECTORY_ENTRY_GLOBALPTR = 8 // RVA of GP
+ IMAGE_DIRECTORY_ENTRY_TLS = 9 // TLS Directory
+ IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG = 10 // Load Configuration Directory
+ IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11 // Bound Import Directory in headers
+ IMAGE_DIRECTORY_ENTRY_IAT = 12 // Import Address Table
+ IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT = 13 // Delay Load Import Descriptors
+ IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR = 14 // COM Runtime descriptor
+)
+
+const IMAGE_SIZEOF_SHORT_NAME = 8
+
+// Section header format
+type IMAGE_SECTION_HEADER struct {
+ Name [IMAGE_SIZEOF_SHORT_NAME]byte
+ physicalAddressOrVirtualSize uint32
+ VirtualAddress uint32
+ SizeOfRawData uint32
+ PointerToRawData uint32
+ PointerToRelocations uint32
+ PointerToLinenumbers uint32
+ NumberOfRelocations uint16
+ NumberOfLinenumbers uint16
+ Characteristics uint32
+}
+
+func (ishdr *IMAGE_SECTION_HEADER) PhysicalAddress() uint32 {
+ return ishdr.physicalAddressOrVirtualSize
+}
+
+func (ishdr *IMAGE_SECTION_HEADER) SetPhysicalAddress(addr uint32) {
+ ishdr.physicalAddressOrVirtualSize = addr
+}
+
+func (ishdr *IMAGE_SECTION_HEADER) VirtualSize() uint32 {
+ return ishdr.physicalAddressOrVirtualSize
+}
+
+func (ishdr *IMAGE_SECTION_HEADER) SetVirtualSize(addr uint32) {
+ ishdr.physicalAddressOrVirtualSize = addr
+}
+
+const (
+ // Section characteristics.
+ IMAGE_SCN_TYPE_REG = 0x00000000 // Reserved.
+ IMAGE_SCN_TYPE_DSECT = 0x00000001 // Reserved.
+ IMAGE_SCN_TYPE_NOLOAD = 0x00000002 // Reserved.
+ IMAGE_SCN_TYPE_GROUP = 0x00000004 // Reserved.
+ IMAGE_SCN_TYPE_NO_PAD = 0x00000008 // Reserved.
+ IMAGE_SCN_TYPE_COPY = 0x00000010 // Reserved.
+
+ IMAGE_SCN_CNT_CODE = 0x00000020 // Section contains code.
+ IMAGE_SCN_CNT_INITIALIZED_DATA = 0x00000040 // Section contains initialized data.
+ IMAGE_SCN_CNT_UNINITIALIZED_DATA = 0x00000080 // Section contains uninitialized data.
+
+ IMAGE_SCN_LNK_OTHER = 0x00000100 // Reserved.
+ IMAGE_SCN_LNK_INFO = 0x00000200 // Section contains comments or some other type of information.
+ IMAGE_SCN_TYPE_OVER = 0x00000400 // Reserved.
+ IMAGE_SCN_LNK_REMOVE = 0x00000800 // Section contents will not become part of image.
+ IMAGE_SCN_LNK_COMDAT = 0x00001000 // Section contents comdat.
+ IMAGE_SCN_MEM_PROTECTED = 0x00004000 // Obsolete.
+ IMAGE_SCN_NO_DEFER_SPEC_EXC = 0x00004000 // Reset speculative exceptions handling bits in the TLB entries for this section.
+ IMAGE_SCN_GPREL = 0x00008000 // Section content can be accessed relative to GP
+ IMAGE_SCN_MEM_FARDATA = 0x00008000
+ IMAGE_SCN_MEM_SYSHEAP = 0x00010000 // Obsolete.
+ IMAGE_SCN_MEM_PURGEABLE = 0x00020000
+ IMAGE_SCN_MEM_16BIT = 0x00020000
+ IMAGE_SCN_MEM_LOCKED = 0x00040000
+ IMAGE_SCN_MEM_PRELOAD = 0x00080000
+
+ IMAGE_SCN_ALIGN_1BYTES = 0x00100000 //
+ IMAGE_SCN_ALIGN_2BYTES = 0x00200000 //
+ IMAGE_SCN_ALIGN_4BYTES = 0x00300000 //
+ IMAGE_SCN_ALIGN_8BYTES = 0x00400000 //
+ IMAGE_SCN_ALIGN_16BYTES = 0x00500000 // Default alignment if no others are specified.
+ IMAGE_SCN_ALIGN_32BYTES = 0x00600000 //
+ IMAGE_SCN_ALIGN_64BYTES = 0x00700000 //
+ IMAGE_SCN_ALIGN_128BYTES = 0x00800000 //
+ IMAGE_SCN_ALIGN_256BYTES = 0x00900000 //
+ IMAGE_SCN_ALIGN_512BYTES = 0x00A00000 //
+ IMAGE_SCN_ALIGN_1024BYTES = 0x00B00000 //
+ IMAGE_SCN_ALIGN_2048BYTES = 0x00C00000 //
+ IMAGE_SCN_ALIGN_4096BYTES = 0x00D00000 //
+ IMAGE_SCN_ALIGN_8192BYTES = 0x00E00000 //
+ IMAGE_SCN_ALIGN_MASK = 0x00F00000
+
+ IMAGE_SCN_LNK_NRELOC_OVFL = 0x01000000 // Section contains extended relocations.
+ IMAGE_SCN_MEM_DISCARDABLE = 0x02000000 // Section can be discarded.
+ IMAGE_SCN_MEM_NOT_CACHED = 0x04000000 // Section is not cachable.
+ IMAGE_SCN_MEM_NOT_PAGED = 0x08000000 // Section is not pageable.
+ IMAGE_SCN_MEM_SHARED = 0x10000000 // Section is shareable.
+ IMAGE_SCN_MEM_EXECUTE = 0x20000000 // Section is executable.
+ IMAGE_SCN_MEM_READ = 0x40000000 // Section is readable.
+ IMAGE_SCN_MEM_WRITE = 0x80000000 // Section is writeable.
+
+ // TLS Characteristic Flags
+ IMAGE_SCN_SCALE_INDEX = 0x00000001 // Tls index is scaled.
+)
+
+// Based relocation format
+type IMAGE_BASE_RELOCATION struct {
+ VirtualAddress uint32
+ SizeOfBlock uint32
+}
+
+const (
+ IMAGE_REL_BASED_ABSOLUTE = 0
+ IMAGE_REL_BASED_HIGH = 1
+ IMAGE_REL_BASED_LOW = 2
+ IMAGE_REL_BASED_HIGHLOW = 3
+ IMAGE_REL_BASED_HIGHADJ = 4
+ IMAGE_REL_BASED_MACHINE_SPECIFIC_5 = 5
+ IMAGE_REL_BASED_RESERVED = 6
+ IMAGE_REL_BASED_MACHINE_SPECIFIC_7 = 7
+ IMAGE_REL_BASED_MACHINE_SPECIFIC_8 = 8
+ IMAGE_REL_BASED_MACHINE_SPECIFIC_9 = 9
+ IMAGE_REL_BASED_DIR64 = 10
+
+ IMAGE_REL_BASED_IA64_IMM64 = 9
+
+ IMAGE_REL_BASED_MIPS_JMPADDR = 5
+ IMAGE_REL_BASED_MIPS_JMPADDR16 = 9
+
+ IMAGE_REL_BASED_ARM_MOV32 = 5
+ IMAGE_REL_BASED_THUMB_MOV32 = 7
+)
+
+// Export Format
+type IMAGE_EXPORT_DIRECTORY struct {
+ Characteristics uint32
+ TimeDateStamp uint32
+ MajorVersion uint16
+ MinorVersion uint16
+ Name uint32
+ Base uint32
+ NumberOfFunctions uint32
+ NumberOfNames uint32
+ AddressOfFunctions uint32 // RVA from base of image
+ AddressOfNames uint32 // RVA from base of image
+ AddressOfNameOrdinals uint32 // RVA from base of image
+}
+
+type IMAGE_IMPORT_BY_NAME struct {
+ Hint uint16
+ Name [1]byte
+}
+
+func IMAGE_ORDINAL(ordinal uintptr) uintptr {
+ return ordinal & 0xffff
+}
+
+func IMAGE_SNAP_BY_ORDINAL(ordinal uintptr) bool {
+ return (ordinal & IMAGE_ORDINAL_FLAG) != 0
+}
+
+// Thread Local Storage
+type IMAGE_TLS_DIRECTORY struct {
+ StartAddressOfRawData uintptr
+ EndAddressOfRawData uintptr
+ AddressOfIndex uintptr // PDWORD
+ AddressOfCallbacks uintptr // PIMAGE_TLS_CALLBACK *;
+ SizeOfZeroFill uint32
+ Characteristics uint32
+}
+
+type IMAGE_IMPORT_DESCRIPTOR struct {
+ characteristicsOrOriginalFirstThunk uint32 // 0 for terminating null import descriptor
+ // RVA to original unbound IAT (PIMAGE_THUNK_DATA)
+ TimeDateStamp uint32 // 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)
+ ForwarderChain uint32 // -1 if no forwarders
+ Name uint32
+ FirstThunk uint32 // RVA to IAT (if bound this IAT has actual addresses)
+}
+
+func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) Characteristics() uint32 {
+ return imgimpdesc.characteristicsOrOriginalFirstThunk
+}
+
+func (imgimpdesc *IMAGE_IMPORT_DESCRIPTOR) OriginalFirstThunk() uint32 {
+ return imgimpdesc.characteristicsOrOriginalFirstThunk
+}
+
+const (
+ DLL_PROCESS_ATTACH = 1
+ DLL_THREAD_ATTACH = 2
+ DLL_THREAD_DETACH = 3
+ DLL_PROCESS_DETACH = 0
+)
+
+//sys loadLibraryA(libFileName *byte) (module windows.Handle, err error) = kernel32.LoadLibraryA
+//sys getProcAddress(module windows.Handle, procName *byte) (addr uintptr, err error) = kernel32.GetProcAddress
+//sys isBadReadPtr(addr uintptr, ucb uintptr) (ret bool) = kernel32.IsBadReadPtr
+
+type SYSTEM_INFO struct {
+ ProcessorArchitecture uint16
+ Reserved uint16
+ PageSize uint32
+ MinimumApplicationAddress uintptr
+ MaximumApplicationAddress uintptr
+ ActiveProcessorMask uintptr
+ NumberOfProcessors uint32
+ ProcessorType uint32
+ AllocationGranularity uint32
+ ProcessorLevel uint16
+ ProcessorRevision uint16
+}