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#include <precomp.h>
//
// patchapi.c
//
// Implementation of PatchAPI for creating and applying patches to files.
//
// Author: Tom McGuire (tommcg) 2/97 - 9/97
//
// Copyright (C) Microsoft, 1997-1999.
//
// MICROSOFT CONFIDENTIAL
//
typedef struct _PATCH_DATA { PVOID PatchData; ULONG PatchSize; } PATCH_DATA, *PPATCH_DATA;
//
// If we're building a DLL, and it's not the applyer-only DLL, we need to
// hook DLL_PROCESS_DETACH so we can unload imagehlp.dll if we dynamically
// load it. We only need imagehlp.dll if we're creating patches.
//
#ifdef BUILDING_PATCHAPI_DLL
#ifndef PATCH_APPLY_CODE_ONLY
BOOLWINAPIDllEntryPoint( HANDLE hDll, DWORD Reason, PVOID Reserved // NULL for dynamic unload, non-NULL for terminating
) { if ( Reason == DLL_PROCESS_ATTACH ) { DisableThreadLibraryCalls( hDll ); InitImagehlpCritSect(); } else if (( Reason == DLL_PROCESS_DETACH ) && ( ! Reserved )) { UnloadImagehlp(); }
return TRUE; }
#endif // ! PATCH_APPLY_CODE_ONLY
#endif // BUILDING_PATCHAPI_DLL
BOOLProgressCallbackWrapper( IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext, IN ULONG CurrentPosition, IN ULONG MaximumPosition ) { BOOL Success = TRUE;
if ( ProgressCallback != NULL ) {
__try {
Success = ProgressCallback( CallbackContext, CurrentPosition, MaximumPosition );
if (( ! Success ) && ( GetLastError() == ERROR_SUCCESS )) { SetLastError( ERROR_CANCELLED ); } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( ERROR_CANCELLED ); Success = FALSE; } }
return Success; }
BOOLWINAPIVNormalizeOldFileImageForPatching( IN PVOID FileMappedImage, IN ULONG FileSize, IN ULONG OptionFlags, IN PVOID OptionData, IN ULONG NewFileCoffBase, IN ULONG NewFileCoffTime, IN ULONG IgnoreRangeCount, IN PPATCH_IGNORE_RANGE IgnoreRangeArray, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, ... ) { UP_IMAGE_NT_HEADERS32 NtHeader; PUCHAR MappedFile; BOOL Modified; BOOL Success; ULONG i;
MappedFile = FileMappedImage; Modified = FALSE; Success = TRUE;
__try {
NtHeader = GetNtHeader( MappedFile, FileSize );
if ( NtHeader ) {
//
// This is a coff image.
//
Modified = NormalizeCoffImage( NtHeader, MappedFile, FileSize, OptionFlags, OptionData, NewFileCoffBase, NewFileCoffTime );
}
else {
//
// Other file type normalizations could be performed here.
//
}
#ifdef TESTCODE
//
// The following test-only code creates a file containing
// the modified coff image to verify that the coff image
// is really a valid coff image. This is for debugging
// only.
//
if ( Modified ) {
HANDLE hFile = CreateFile( "Normalized.out", GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( hFile != INVALID_HANDLE_VALUE ) {
DWORD Actual;
WriteFile( hFile, MappedFile, FileSize, &Actual, NULL );
CloseHandle( hFile );
} }
#endif // TESTCODE
for ( i = 0; i < IgnoreRangeCount; i++ ) { if (( IgnoreRangeArray[ i ].OffsetInOldFile + IgnoreRangeArray[ i ].LengthInBytes ) <= FileSize ) { ZeroMemory( MappedFile + IgnoreRangeArray[ i ].OffsetInOldFile, IgnoreRangeArray[ i ].LengthInBytes ); } }
for ( i = 0; i < RetainRangeCount; i++ ) { if (( RetainRangeArray[ i ].OffsetInOldFile + RetainRangeArray[ i ].LengthInBytes ) <= FileSize ) { ZeroMemory( MappedFile + RetainRangeArray[ i ].OffsetInOldFile, RetainRangeArray[ i ].LengthInBytes ); } } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; }
return Success; }
BOOLPATCHAPIGetFilePatchSignatureA( IN LPCSTR FileName, IN ULONG OptionFlags, IN PVOID OptionData, IN ULONG IgnoreRangeCount, IN PPATCH_IGNORE_RANGE IgnoreRangeArray, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN ULONG SignatureBufferSize, OUT PVOID SignatureBuffer ) { BOOL Success = FALSE; HANDLE FileHandle;
FileHandle = CreateFileA( FileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( FileHandle != INVALID_HANDLE_VALUE ) {
Success = GetFilePatchSignatureByHandle( FileHandle, OptionFlags, OptionData, IgnoreRangeCount, IgnoreRangeArray, RetainRangeCount, RetainRangeArray, SignatureBufferSize, SignatureBuffer );
CloseHandle( FileHandle ); }
return Success; }
BOOLPATCHAPIGetFilePatchSignatureW( IN LPCWSTR FileName, IN ULONG OptionFlags, IN PVOID OptionData, IN ULONG IgnoreRangeCount, IN PPATCH_IGNORE_RANGE IgnoreRangeArray, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN ULONG SignatureBufferSizeInBytes, OUT PVOID SignatureBuffer ) { CHAR AnsiSignatureBuffer[ 40 ]; // big enough for hex MD5 (33 bytes)
HANDLE FileHandle; INT Converted; BOOL Success = FALSE;
FileHandle = CreateFileW( FileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( FileHandle != INVALID_HANDLE_VALUE ) {
Success = GetFilePatchSignatureByHandle( FileHandle, OptionFlags, OptionData, IgnoreRangeCount, IgnoreRangeArray, RetainRangeCount, RetainRangeArray, sizeof( AnsiSignatureBuffer ), AnsiSignatureBuffer );
if ( Success ) {
//
// Worst case growth from ANSI to UNICODE is 2X.
//
if (( SignatureBufferSizeInBytes / 2 ) < ( strlen( AnsiSignatureBuffer ) + 1 )) { SetLastError( ERROR_INSUFFICIENT_BUFFER ); Success = FALSE; }
else {
Converted = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, AnsiSignatureBuffer, -1, SignatureBuffer, SignatureBufferSizeInBytes / 2 );
Success = Converted ? TRUE : FALSE; } }
CloseHandle( FileHandle ); }
return Success; }
BOOLPATCHAPIGetFilePatchSignatureByHandle( IN HANDLE FileHandle, IN ULONG OptionFlags, IN PVOID OptionData, IN ULONG IgnoreRangeCount, IN PPATCH_IGNORE_RANGE IgnoreRangeArray, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN ULONG SignatureBufferSize, OUT PVOID SignatureBuffer ) { PVOID FileMapped; ULONG FileSize; ULONG FileCrc; MD5_HASH FileMD5; BOOL Success;
Success = MyMapViewOfFileByHandle( FileHandle, &FileSize, &FileMapped );
if ( Success ) {
//
// Note that we must normalize to a fixed known rebase address,
// so the CRC from this might be different than the OldFileCrc
// in a patch header that is specific to a new file's rebase
// address. Note that if PATCH_OPTION_NO_REBASE is specified
// then the rebase address is ignored.
//
Success = NormalizeOldFileImageForPatching( FileMapped, FileSize, OptionFlags, OptionData, 0x10000000, // non-zero fixed coff base
0x10000000, // non-zero fixed coff time
IgnoreRangeCount, IgnoreRangeArray, RetainRangeCount, RetainRangeArray );
if ( Success ) {
if ( OptionFlags & PATCH_OPTION_SIGNATURE_MD5 ) {
Success = SafeCompleteMD5( FileMapped, FileSize, &FileMD5 );
if ( Success ) {
if ( SignatureBufferSize < 33 ) { SetLastError( ERROR_INSUFFICIENT_BUFFER ); Success = FALSE; }
else { HashToHexString( &FileMD5, ((LPSTR) SignatureBuffer )); } } }
else { // signature type is CRC-32
Success = SafeCompleteCrc32( FileMapped, FileSize, &FileCrc );
if ( Success ) {
if ( SignatureBufferSize < 9 ) { SetLastError( ERROR_INSUFFICIENT_BUFFER ); Success = FALSE; }
else { DwordToHexString( FileCrc, (LPSTR) SignatureBuffer ); } } } }
UnmapViewOfFile( FileMapped ); }
if (( ! Success ) && ( GetLastError() == ERROR_SUCCESS )) {
SetLastError( ERROR_EXTENDED_ERROR ); }
return Success; }
#ifndef PATCH_APPLY_CODE_ONLY
VOIDReduceRiftTable( IN PRIFT_TABLE RiftTable ) { PRIFT_ENTRY RiftEntryArray = RiftTable->RiftEntryArray; PUCHAR RiftUsageArray = RiftTable->RiftUsageArray; ULONG RiftEntryCount = RiftTable->RiftEntryCount; LONG CurrentDisplacement; LONG ThisDisplacement; ULONG i;
//
// Essentially we want to remove the usage count from any entry where
// the preceding USED entry would produce the same rift displacement.
//
// The first used entry should contain a non-zero displacement (any
// USED entries before that should be marked UNUSED because they will
// coast from zero).
//
CurrentDisplacement = 0;
for ( i = 0; i < RiftEntryCount; i++ ) {
if ( RiftUsageArray[ i ] != 0 ) {
ThisDisplacement = RiftEntryArray[ i ].NewFileRva - RiftEntryArray[ i ].OldFileRva;
if ( ThisDisplacement == CurrentDisplacement ) { RiftUsageArray[ i ] = 0; // not needed
} else { CurrentDisplacement = ThisDisplacement; } } } }
#endif // PATCH_APPLY_CODE_ONLY
BOOLWINAPIVTransformOldFileImageForPatching( IN ULONG TransformOptions, IN PVOID OldFileMapped, IN ULONG OldFileSize, IN ULONG NewFileResTime, IN PRIFT_TABLE RiftTable, ... ) { UP_IMAGE_NT_HEADERS32 NtHeader; BOOL Success = TRUE;
__try {
NtHeader = GetNtHeader( OldFileMapped, OldFileSize );
if ( NtHeader ) {
Success = TransformCoffImage( TransformOptions, NtHeader, OldFileMapped, OldFileSize, NewFileResTime, RiftTable, NULL ); }
else {
//
// Other file type transformations could be performed here.
//
}
#ifndef PATCH_APPLY_CODE_ONLY
if ( RiftTable->RiftUsageArray != NULL ) { ReduceRiftTable( RiftTable ); }
#endif // PATCH_APPLY_CODE_ONLY
}
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; }
#ifdef TESTCODE
//
// The following test-only code creates a file containing
// the modified coff image to verify that the coff image
// is really a valid coff image. This is for debugging
// only.
//
if ( Success ) {
HANDLE hFile = CreateFile( "Transformed.out", GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( hFile != INVALID_HANDLE_VALUE ) {
DWORD Actual;
WriteFile( hFile, OldFileMapped, OldFileSize, &Actual, NULL );
CloseHandle( hFile );
} }
#endif // TESTCODE
return Success; }
PUCHAR__fastcallVariableLengthUnsignedDecode( IN PUCHAR Buffer, OUT PULONG ReturnValue ) { PUCHAR p = Buffer; ULONG Value = 0; ULONG Shift = 0;
do { Value |= (( *p & 0x7F ) << Shift ); Shift += 7; } while (( ! ( *p++ & 0x80 )) && ( Shift < 32 ));
*ReturnValue = Value;
return p; }
PUCHAR__fastcallVariableLengthSignedDecode( IN PUCHAR Buffer, OUT PLONG ReturnValue ) { PUCHAR p = Buffer; ULONG Shift; LONG Value;
Value = *p & 0x3F; Shift = 6;
if ( ! ( *p++ & 0x80 )) { do { Value |= (( *p & 0x7F ) << Shift ); Shift += 7; } while (( ! ( *p++ & 0x80 )) && ( Shift < 32 )); }
if ( *Buffer & 0x40 ) { Value = -Value; }
*ReturnValue = Value;
return p; }
UCHARPatchVersion( IN ULONG PatchSignature ) { union { ULONG Signature; UCHAR Byte[ 4 ]; } u;
u.Signature = PatchSignature;
if (( u.Byte[ 0 ] == 'P' ) && ( u.Byte[ 1 ] == 'A' ) && ( u.Byte[ 2 ] >= '0' ) && ( u.Byte[ 2 ] <= '9' ) && ( u.Byte[ 3 ] >= '0' ) && ( u.Byte[ 3 ] <= '9' )) {
return (UCHAR)(( u.Byte[ 2 ] - '0' ) * 10 + ( u.Byte[ 3 ] - '0' )); }
return 0; }
BOOLDecodePatchHeader( IN PVOID PatchHeader, IN ULONG PatchHeaderMaxSize, IN HANDLE SubAllocator, OUT PULONG PatchHeaderActualSize, OUT PPATCH_HEADER_INFO *HeaderInfo ) { PHEADER_OLD_FILE_INFO OldFileInfo; PPATCH_HEADER_INFO Header; ULONG i, j; LONG Delta; LONG DeltaNew; ULONG DeltaPos; ULONG Length; ULONG PreviousOffset; ULONG PreviousOldRva; ULONG PreviousNewRva; BOOL Success; PUCHAR p;
//
// A couple of implementation notes here. The PatchHeaderMaxSize
// value does NOT guarantee that we won't try to read beyond that
// memory address in this routine. This routine should be called
// under try/except to trap the case where we walk off the end of
// a corrupt patch header. The PatchHeaderMaxSize is just a helper
// value that lets us know if we did have a corrupt header in the
// case where we walked too far but not off the end of the page.
//
Success = FALSE;
p = PatchHeader;
Header = SubAllocate( SubAllocator, sizeof( PATCH_HEADER_INFO ));
//
// SubAllocate provides zeroed memory.
//
if ( Header != NULL ) {
__try {
Header->Signature = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG );
if ( Header->Signature != PATCH_SIGNATURE ) { if ( PatchVersion( Header->Signature ) > PatchVersion( PATCH_SIGNATURE )) { SetLastError( ERROR_PATCH_NEWER_FORMAT ); } else { SetLastError( ERROR_PATCH_CORRUPT ); } __leave; }
Header->OptionFlags = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG );
//
// The PATCH_OPTION_NO_TIMESTAMP flag is stored inverse for
// backward compatibility, so flip it back here.
//
Header->OptionFlags ^= PATCH_OPTION_NO_TIMESTAMP;
//
// Now check for invalid flags.
//
if ( Header->OptionFlags & ~PATCH_OPTION_VALID_FLAGS ) { SetLastError( ERROR_PATCH_CORRUPT ); __leave; }
//
// If the PATCH_OPTION_EXTENDED_OPTIONS flag is set, the next
// 4 bytes is the ExtendedOptionFlags value.
//
if ( Header->OptionFlags & PATCH_OPTION_EXTENDED_OPTIONS ) {
Header->ExtendedOptionFlags = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG ); }
//
// No stored OptionData defined for now.
//
if ( ! ( Header->OptionFlags & PATCH_OPTION_NO_TIMESTAMP )) {
Header->NewFileTime = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG ); }
if ( ! ( Header->OptionFlags & PATCH_OPTION_NO_REBASE )) {
Header->NewFileCoffBase = ((ULONG)*(UNALIGNED USHORT *)( p )) << 16; p += sizeof( USHORT );
ASSERT( Header->NewFileCoffBase != 0 );
//
// If NewFileTime is nonzero, CoffTime is stored as a signed
// delta from NewFileTime since they are usually very close.
// If NewFileTime is zero, CoffTime is encoded as a ULONG.
//
if ( Header->NewFileTime != 0 ) {
p = VariableLengthSignedDecode( p, &Delta ); Header->NewFileCoffTime = Header->NewFileTime - Delta; }
else {
Header->NewFileCoffTime = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG ); } }
if ( ! ( Header->OptionFlags & PATCH_OPTION_NO_RESTIMEFIX )) {
//
// If NewFileCoffTime is nonzero, ResTime is stored as a
// signed delta from NewFileCoffTime since they are usually
// very close. If NewFileCoffTime is zero, ResTime is
// encoded as a ULONG.
//
if ( Header->NewFileCoffTime != 0 ) {
p = VariableLengthSignedDecode( p, &Delta ); Header->NewFileResTime = Header->NewFileCoffTime - Delta; }
else {
Header->NewFileResTime = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG ); } }
p = VariableLengthUnsignedDecode( p, &Header->NewFileSize );
Header->NewFileCrc = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG );
Header->OldFileCount = *p++;
Header->OldFileInfoArray = SubAllocate( SubAllocator, Header->OldFileCount * sizeof( HEADER_OLD_FILE_INFO ));
if ( Header->OldFileInfoArray == NULL ) { __leave; }
for ( i = 0; i < Header->OldFileCount; i++ ) {
OldFileInfo = &Header->OldFileInfoArray[ i ];
p = VariableLengthSignedDecode( p, &Delta );
if ((LONG)( Header->NewFileSize + Delta ) < 0 ) { SetLastError( ERROR_PATCH_CORRUPT ); __leave; }
OldFileInfo->OldFileSize = Header->NewFileSize + Delta;
OldFileInfo->OldFileCrc = *(UNALIGNED ULONG *)( p ); p += sizeof( ULONG );
OldFileInfo->IgnoreRangeCount = *p++;
if ( OldFileInfo->IgnoreRangeCount != 0 ) {
OldFileInfo->IgnoreRangeArray = SubAllocate( SubAllocator, OldFileInfo->IgnoreRangeCount * sizeof( PATCH_IGNORE_RANGE ));
if ( OldFileInfo->IgnoreRangeArray == NULL ) { __leave; }
PreviousOffset = 0;
for ( j = 0; j < OldFileInfo->IgnoreRangeCount; j++ ) {
p = VariableLengthSignedDecode( p, &Delta ); p = VariableLengthUnsignedDecode( p, &Length );
OldFileInfo->IgnoreRangeArray[ j ].OffsetInOldFile = PreviousOffset + Delta; OldFileInfo->IgnoreRangeArray[ j ].LengthInBytes = Length;
PreviousOffset = PreviousOffset + Delta + Length;
if ( PreviousOffset > OldFileInfo->OldFileSize ) { SetLastError( ERROR_PATCH_CORRUPT ); __leave; } } }
OldFileInfo->RetainRangeCount = *p++;
if ( OldFileInfo->RetainRangeCount != 0 ) {
OldFileInfo->RetainRangeArray = SubAllocate( SubAllocator, OldFileInfo->RetainRangeCount * sizeof( PATCH_RETAIN_RANGE ));
if ( OldFileInfo->RetainRangeArray == NULL ) { __leave; }
PreviousOffset = 0;
for ( j = 0; j < OldFileInfo->RetainRangeCount; j++ ) {
p = VariableLengthSignedDecode( p, &Delta ); p = VariableLengthSignedDecode( p, &DeltaNew ); p = VariableLengthUnsignedDecode( p, &Length );
OldFileInfo->RetainRangeArray[ j ].OffsetInOldFile = PreviousOffset + Delta; OldFileInfo->RetainRangeArray[ j ].OffsetInNewFile = PreviousOffset + Delta + DeltaNew; OldFileInfo->RetainRangeArray[ j ].LengthInBytes = Length;
PreviousOffset = PreviousOffset + Delta + Length;
if (( PreviousOffset > OldFileInfo->OldFileSize ) || (( PreviousOffset + DeltaNew ) > Header->NewFileSize )) { SetLastError( ERROR_PATCH_CORRUPT ); __leave; } } }
p = VariableLengthUnsignedDecode( p, &OldFileInfo->RiftTable.RiftEntryCount );
if ( OldFileInfo->RiftTable.RiftEntryCount != 0 ) {
OldFileInfo->RiftTable.RiftEntryArray = SubAllocate( SubAllocator, OldFileInfo->RiftTable.RiftEntryCount * sizeof( RIFT_ENTRY ));
if ( OldFileInfo->RiftTable.RiftEntryArray == NULL ) { __leave; }
OldFileInfo->RiftTable.RiftUsageArray = NULL;
PreviousOldRva = 0; PreviousNewRva = 0;
for ( j = 0; j < OldFileInfo->RiftTable.RiftEntryCount; j++ ) {
p = VariableLengthUnsignedDecode( p, &DeltaPos ); p = VariableLengthSignedDecode( p, &DeltaNew );
OldFileInfo->RiftTable.RiftEntryArray[ j ].OldFileRva = PreviousOldRva + DeltaPos; OldFileInfo->RiftTable.RiftEntryArray[ j ].NewFileRva = PreviousNewRva + DeltaNew;
PreviousOldRva += DeltaPos; PreviousNewRva += DeltaNew; } }
p = VariableLengthUnsignedDecode( p, &OldFileInfo->PatchDataSize ); }
if ( p > ((PUCHAR)PatchHeader + PatchHeaderMaxSize )) { SetLastError( ERROR_PATCH_CORRUPT ); __leave; }
Success = TRUE; }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( ERROR_PATCH_CORRUPT ); Success = FALSE; } }
if ( Success ) {
if ( PatchHeaderActualSize ) { *PatchHeaderActualSize = (ULONG)( p - (PUCHAR)PatchHeader ); }
if ( HeaderInfo ) { *HeaderInfo = Header; } }
return Success; }
//
// Following group of functions and exported apis are exclusively for
// creating patches. If we're only compiling the apply code, ignore
// this group of functions.
//
#ifndef PATCH_APPLY_CODE_ONLY
PUCHAR__fastcallVariableLengthUnsignedEncode( OUT PUCHAR Buffer, IN ULONG Value ) { UCHAR Byte = (UCHAR)( Value & 0x7F ); // low order 7 bits
Value >>= 7;
while ( Value ) {
*Buffer++ = Byte;
Byte = (UCHAR)( Value & 0x7F ); // next 7 higher order bits
Value >>= 7;
}
*Buffer++ = (UCHAR)( Byte | 0x80 );
return Buffer; }
PUCHAR__fastcallVariableLengthSignedEncode( OUT PUCHAR Buffer, IN LONG Value ) { UCHAR Byte;
if ( Value < 0 ) { Value = -Value; Byte = (UCHAR)(( Value & 0x3F ) | 0x40 ); } else { Byte = (UCHAR)( Value & 0x3F ); }
Value >>= 6;
while ( Value ) {
*Buffer++ = Byte;
Byte = (UCHAR)( Value & 0x7F ); // next 7 higher order bits
Value >>= 7;
}
*Buffer++ = (UCHAR)( Byte | 0x80 );
return Buffer; }
ULONGEncodePatchHeader( IN PPATCH_HEADER_INFO HeaderInfo, OUT PVOID PatchHeaderBuffer ) { PHEADER_OLD_FILE_INFO OldFileInfo; ULONG i, j; LONG Delta; ULONG PreviousOffset; ULONG PreviousOldRva; ULONG PreviousNewRva; ULONG ActiveRiftCount;
PUCHAR p = PatchHeaderBuffer;
#ifdef TESTCODE
PUCHAR q;#endif // TESTCODE
ASSERT( HeaderInfo->Signature == PATCH_SIGNATURE ); ASSERT((( HeaderInfo->OptionFlags & ~PATCH_OPTION_VALID_FLAGS ) == 0 )); ASSERT((( HeaderInfo->OptionFlags & PATCH_OPTION_EXTENDED_OPTIONS ) != 0 ) == ( HeaderInfo->ExtendedOptionFlags != 0 )); ASSERT((( HeaderInfo->OptionFlags & PATCH_OPTION_NO_TIMESTAMP ) == 0 ) == ( HeaderInfo->NewFileTime != 0 )); ASSERT((( HeaderInfo->OptionFlags & PATCH_OPTION_NO_REBASE ) == 0 ) == ( HeaderInfo->NewFileCoffBase != 0 )); ASSERT((( HeaderInfo->OptionFlags & PATCH_OPTION_NO_REBASE ) == 0 ) == ( HeaderInfo->NewFileCoffTime != 0 )); ASSERT((( HeaderInfo->OptionFlags & PATCH_OPTION_NO_RESTIMEFIX ) == 0 ) == ( HeaderInfo->NewFileResTime != 0 ));
*(UNALIGNED ULONG *)( p ) = HeaderInfo->Signature; p += sizeof( ULONG );
//
// The PATCH_OPTION_NO_TIMESTAMP flag is stored inverse for
// backward compatibility, so flip it when storing it here.
//
*(UNALIGNED ULONG *)( p ) = ( HeaderInfo->OptionFlags ^ PATCH_OPTION_NO_TIMESTAMP ); p += sizeof( ULONG );
//
// If the PATCH_OPTION_EXTENDED_OPTIONS flag is set, the next
// 4 bytes is the ExtendedOptionFlags value.
//
if ( HeaderInfo->OptionFlags & PATCH_OPTION_EXTENDED_OPTIONS ) {
*(UNALIGNED ULONG *)( p ) = HeaderInfo->ExtendedOptionFlags; p += sizeof( ULONG ); }
//
// No stored OptionData defined for now.
//
if ( ! ( HeaderInfo->OptionFlags & PATCH_OPTION_NO_TIMESTAMP )) {
*(UNALIGNED ULONG *)( p ) = HeaderInfo->NewFileTime; p += sizeof( ULONG ); }
if ( ! ( HeaderInfo->OptionFlags & PATCH_OPTION_NO_REBASE )) {
ASSERT(( HeaderInfo->NewFileCoffBase >> 16 ) != 0 );
*(UNALIGNED USHORT *)( p ) = (USHORT)( HeaderInfo->NewFileCoffBase >> 16 ); p += sizeof( USHORT );
//
// If NewFileTime is nonzero, CoffTime is stored as a signed
// delta from NewFileTime since they are usually very close.
// If NewFileTime is zero, CoffTime is encoded as a ULONG.
//
if ( HeaderInfo->NewFileTime != 0 ) {
Delta = HeaderInfo->NewFileTime - HeaderInfo->NewFileCoffTime; p = VariableLengthSignedEncode( p, Delta ); }
else {
*(UNALIGNED ULONG *)( p ) = HeaderInfo->NewFileCoffTime; p += sizeof( ULONG ); } }
if ( ! ( HeaderInfo->OptionFlags & PATCH_OPTION_NO_RESTIMEFIX )) {
//
// If NewFileCoffTime is nonzero, ResTime is stored as a
// signed delta from NewFileCoffTime since they are usually
// very close. If NewFileCoffTime is zero, ResTime is
// encoded as a ULONG.
//
if ( HeaderInfo->NewFileCoffTime != 0 ) {
Delta = HeaderInfo->NewFileCoffTime - HeaderInfo->NewFileResTime; p = VariableLengthSignedEncode( p, Delta ); }
else {
*(UNALIGNED ULONG *)( p ) = HeaderInfo->NewFileResTime; p += sizeof( ULONG ); } }
p = VariableLengthUnsignedEncode( p, HeaderInfo->NewFileSize );
*(UNALIGNED ULONG *)( p ) = HeaderInfo->NewFileCrc; p += sizeof( ULONG );
ASSERT( HeaderInfo->OldFileCount < 256 );
*p++ = (UCHAR)( HeaderInfo->OldFileCount );
for ( i = 0; i < HeaderInfo->OldFileCount; i++ ) {
OldFileInfo = &HeaderInfo->OldFileInfoArray[ i ];
Delta = OldFileInfo->OldFileSize - HeaderInfo->NewFileSize; p = VariableLengthSignedEncode( p, Delta );
*(UNALIGNED ULONG *)( p ) = OldFileInfo->OldFileCrc; p += sizeof( ULONG );
ASSERT( OldFileInfo->IgnoreRangeCount < 256 );
*p++ = (UCHAR)( OldFileInfo->IgnoreRangeCount );
PreviousOffset = 0;
for ( j = 0; j < OldFileInfo->IgnoreRangeCount; j++ ) {
Delta = OldFileInfo->IgnoreRangeArray[ j ].OffsetInOldFile - PreviousOffset;
PreviousOffset = OldFileInfo->IgnoreRangeArray[ j ].OffsetInOldFile + OldFileInfo->IgnoreRangeArray[ j ].LengthInBytes;
ASSERT( PreviousOffset <= OldFileInfo->OldFileSize );
p = VariableLengthSignedEncode( p, Delta );
p = VariableLengthUnsignedEncode( p, OldFileInfo->IgnoreRangeArray[ j ].LengthInBytes ); }
ASSERT( OldFileInfo->RetainRangeCount < 256 );
*p++ = (UCHAR)( OldFileInfo->RetainRangeCount );
PreviousOffset = 0;
for ( j = 0; j < OldFileInfo->RetainRangeCount; j++ ) {
Delta = OldFileInfo->RetainRangeArray[ j ].OffsetInOldFile - PreviousOffset;
PreviousOffset = OldFileInfo->RetainRangeArray[ j ].OffsetInOldFile + OldFileInfo->RetainRangeArray[ j ].LengthInBytes;
ASSERT( PreviousOffset <= OldFileInfo->OldFileSize );
p = VariableLengthSignedEncode( p, Delta );
Delta = OldFileInfo->RetainRangeArray[ j ].OffsetInNewFile - OldFileInfo->RetainRangeArray[ j ].OffsetInOldFile;
p = VariableLengthSignedEncode( p, Delta );
p = VariableLengthUnsignedEncode( p, OldFileInfo->RetainRangeArray[ j ].LengthInBytes ); }
ActiveRiftCount = 0;
ASSERT(( OldFileInfo->RiftTable.RiftEntryCount == 0 ) || ( OldFileInfo->RiftTable.RiftUsageArray != NULL ));
for ( j = 0; j < OldFileInfo->RiftTable.RiftEntryCount; j++ ) { if ( OldFileInfo->RiftTable.RiftUsageArray[ j ] ) { ++ActiveRiftCount; } }
#ifdef TESTCODE2
fprintf( stderr, "\n\n" );
#endif // TESTCODE2
#ifdef TESTCODE
q = p;
#endif // TESTCODE
if (( OldFileInfo->RiftTable.RiftEntryCount ) && ( ActiveRiftCount == 0 )) {
//
// This is a special case. We have a rift table but didn't use
// any entries during transformation. This can happen if all the
// rifts coast to zero for extremely similar files. If we encode
// the rift count as zero, no transformations will be performed
// during patch apply. To prevent that, we'll encode one rift of
// 0,0 which is usually just the implied initial rift.
//
ActiveRiftCount = 1;
p = VariableLengthUnsignedEncode( p, ActiveRiftCount ); p = VariableLengthUnsignedEncode( p, 0 ); p = VariableLengthSignedEncode( p, 0 );
}
else {
p = VariableLengthUnsignedEncode( p, ActiveRiftCount );
PreviousOldRva = 0; PreviousNewRva = 0;
for ( j = 0; j < OldFileInfo->RiftTable.RiftEntryCount; j++ ) {
if ( OldFileInfo->RiftTable.RiftUsageArray[ j ] ) {
#ifdef TESTCODE2
fprintf( stderr, "%9X ", OldFileInfo->RiftTable.RiftEntryArray[ j ].OldFileRva ); fprintf( stderr, "%9X ", OldFileInfo->RiftTable.RiftEntryArray[ j ].NewFileRva );#endif // TESTCODE2
Delta = OldFileInfo->RiftTable.RiftEntryArray[ j ].OldFileRva - PreviousOldRva;
ASSERT( Delta > 0 ); // sorted by OldFileRva
#ifdef TESTCODE2
fprintf( stderr, "%9d ", Delta );
#endif // TESTCODE2
PreviousOldRva = OldFileInfo->RiftTable.RiftEntryArray[ j ].OldFileRva;
p = VariableLengthUnsignedEncode( p, Delta );
Delta = OldFileInfo->RiftTable.RiftEntryArray[ j ].NewFileRva - PreviousNewRva;
#ifdef TESTCODE2
fprintf( stderr, "%9d\n", Delta );#endif // TESTCODE2
PreviousNewRva = OldFileInfo->RiftTable.RiftEntryArray[ j ].NewFileRva;
p = VariableLengthSignedEncode( p, Delta ); } } }
#ifdef TESTCODE
if ( ActiveRiftCount > 0 ) { printf( "\r%9d rifts encoded in %d bytes (%.1f bytes per rift)\n", ActiveRiftCount, p - q, ((double)( p - q ) / ActiveRiftCount )); }
#endif // TESTCODE
p = VariableLengthUnsignedEncode( p, OldFileInfo->PatchDataSize ); }
return (ULONG)( p - (PUCHAR) PatchHeaderBuffer ); }
BOOLPATCHAPICreatePatchFileA( IN LPCSTR OldFileName, IN LPCSTR NewFileName, OUT LPCSTR PatchFileName, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData // optional
) { PATCH_OLD_FILE_INFO_A OldFileInfo = { sizeof( PATCH_OLD_FILE_INFO_A ), OldFileName, 0, NULL, 0, NULL };
return CreatePatchFileExA( 1, &OldFileInfo, NewFileName, PatchFileName, OptionFlags, OptionData, NULL, NULL ); }
BOOLPATCHAPICreatePatchFileW( IN LPCWSTR OldFileName, IN LPCWSTR NewFileName, OUT LPCWSTR PatchFileName, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData // optional
) { PATCH_OLD_FILE_INFO_W OldFileInfo = { sizeof( PATCH_OLD_FILE_INFO_W ), OldFileName, 0, NULL, 0, NULL };
return CreatePatchFileExW( 1, &OldFileInfo, NewFileName, PatchFileName, OptionFlags, OptionData, NULL, NULL ); }
BOOLPATCHAPICreatePatchFileByHandles( IN HANDLE OldFileHandle, IN HANDLE NewFileHandle, OUT HANDLE PatchFileHandle, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData // optional
) { PATCH_OLD_FILE_INFO_H OldFileInfo = { sizeof( PATCH_OLD_FILE_INFO_H ), OldFileHandle, 0, NULL, 0, NULL };
return CreatePatchFileByHandlesEx( 1, &OldFileInfo, NewFileHandle, PatchFileHandle, OptionFlags, OptionData, NULL, NULL ); }
BOOLPATCHAPICreatePatchFileExA( IN ULONG OldFileCount, IN PPATCH_OLD_FILE_INFO_A OldFileInfoArray, IN LPCSTR NewFileName, OUT LPCSTR PatchFileName, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData, // optional
IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { PPATCH_OLD_FILE_INFO_H OldFileInfoByHandle; HANDLE PatchFileHandle; HANDLE NewFileHandle; BOOL Success; ULONG i;
OldFileInfoByHandle = _alloca( OldFileCount * sizeof( PATCH_OLD_FILE_INFO_H )); ZeroMemory( OldFileInfoByHandle, OldFileCount * sizeof( PATCH_OLD_FILE_INFO_H ));
if ( OldFileCount == 0 ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; }
Success = TRUE;
for ( i = 0; i < OldFileCount; i++ ) {
OldFileInfoByHandle[ i ].SizeOfThisStruct = sizeof( PATCH_OLD_FILE_INFO_H ); OldFileInfoByHandle[ i ].IgnoreRangeCount = OldFileInfoArray[ i ].IgnoreRangeCount; OldFileInfoByHandle[ i ].IgnoreRangeArray = OldFileInfoArray[ i ].IgnoreRangeArray; OldFileInfoByHandle[ i ].RetainRangeCount = OldFileInfoArray[ i ].RetainRangeCount; OldFileInfoByHandle[ i ].RetainRangeArray = OldFileInfoArray[ i ].RetainRangeArray;
OldFileInfoByHandle[ i ].OldFileHandle = CreateFileA( OldFileInfoArray[ i ].OldFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( OldFileInfoByHandle[ i ].OldFileHandle == INVALID_HANDLE_VALUE ) { Success = FALSE; break; } }
if ( Success ) {
Success = FALSE;
NewFileHandle = CreateFileA( NewFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( NewFileHandle != INVALID_HANDLE_VALUE ) {
PatchFileHandle = CreateFileA( PatchFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
Success = CreatePatchFileByHandlesEx( OldFileCount, OldFileInfoByHandle, NewFileHandle, PatchFileHandle, OptionFlags, OptionData, ProgressCallback, CallbackContext );
CloseHandle( PatchFileHandle );
if ( ! Success ) { DeleteFileA( PatchFileName ); } }
CloseHandle( NewFileHandle ); } }
for ( i = 0; i < OldFileCount; i++ ) { if (( OldFileInfoByHandle[ i ].OldFileHandle != NULL ) && ( OldFileInfoByHandle[ i ].OldFileHandle != INVALID_HANDLE_VALUE )) {
CloseHandle( OldFileInfoByHandle[ i ].OldFileHandle ); } }
return Success; }
BOOLPATCHAPICreatePatchFileExW( IN ULONG OldFileCount, IN PPATCH_OLD_FILE_INFO_W OldFileInfoArray, IN LPCWSTR NewFileName, OUT LPCWSTR PatchFileName, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData, // optional
IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { PPATCH_OLD_FILE_INFO_H OldFileInfoByHandle; HANDLE PatchFileHandle; HANDLE NewFileHandle; BOOL Success; ULONG i;
OldFileInfoByHandle = _alloca( OldFileCount * sizeof( PATCH_OLD_FILE_INFO_H )); ZeroMemory( OldFileInfoByHandle, OldFileCount * sizeof( PATCH_OLD_FILE_INFO_H ));
if ( OldFileCount == 0 ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; }
Success = TRUE;
for ( i = 0; i < OldFileCount; i++ ) {
OldFileInfoByHandle[ i ].SizeOfThisStruct = sizeof( PATCH_OLD_FILE_INFO_H ); OldFileInfoByHandle[ i ].IgnoreRangeCount = OldFileInfoArray[ i ].IgnoreRangeCount; OldFileInfoByHandle[ i ].IgnoreRangeArray = OldFileInfoArray[ i ].IgnoreRangeArray; OldFileInfoByHandle[ i ].RetainRangeCount = OldFileInfoArray[ i ].RetainRangeCount; OldFileInfoByHandle[ i ].RetainRangeArray = OldFileInfoArray[ i ].RetainRangeArray;
OldFileInfoByHandle[ i ].OldFileHandle = CreateFileW( OldFileInfoArray[ i ].OldFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( OldFileInfoByHandle[ i ].OldFileHandle == INVALID_HANDLE_VALUE ) { Success = FALSE; break; } }
if ( Success ) {
Success = FALSE;
NewFileHandle = CreateFileW( NewFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( NewFileHandle != INVALID_HANDLE_VALUE ) {
PatchFileHandle = CreateFileW( PatchFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
Success = CreatePatchFileByHandlesEx( OldFileCount, OldFileInfoByHandle, NewFileHandle, PatchFileHandle, OptionFlags, OptionData, ProgressCallback, CallbackContext );
CloseHandle( PatchFileHandle );
if ( ! Success ) { DeleteFileW( PatchFileName ); } }
CloseHandle( NewFileHandle ); } }
for ( i = 0; i < OldFileCount; i++ ) { if (( OldFileInfoByHandle[ i ].OldFileHandle != NULL ) && ( OldFileInfoByHandle[ i ].OldFileHandle != INVALID_HANDLE_VALUE )) {
CloseHandle( OldFileInfoByHandle[ i ].OldFileHandle ); } }
return Success; }
BOOLPATCHAPICreatePatchFileByHandlesEx( IN ULONG OldFileCount, IN PPATCH_OLD_FILE_INFO_H OldFileInfoArray, IN HANDLE NewFileHandle, OUT HANDLE PatchFileHandle, IN ULONG OptionFlags, IN PPATCH_OPTION_DATA OptionData, // optional
IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { PATCH_HEADER_INFO HeaderInfo; UP_IMAGE_NT_HEADERS32 NtHeader; UP_IMAGE_NT_HEADERS32 OldFileNtHeader; PPATCH_DATA PatchArray; PFILETIME PatchFileTime; FILETIME NewFileTime; PUCHAR NewFileMapped; ULONG NewFileSize; ULONG NewFileCrc; ULONG NewFileCoffBase; ULONG NewFileCoffTime; ULONG NewFileResTime; ULONG NewFileCompressedSize; PUCHAR OldFileMapped; ULONG OldFileSize; ULONG OldFileCrc; PUCHAR PatchFileMapped; PUCHAR PatchBuffer; ULONG PatchBufferSize; PUCHAR PatchAltBuffer; ULONG PatchAltSize; ULONG PatchDataSize; ULONG PatchFileCrc; ULONG HeaderSize; ULONG HeaderOldFileCount; ULONG ProgressPosition; ULONG ProgressMaximum; ULONG ErrorCode; BOOL TryLzxBoth; BOOL Success; BOOL Transform; HANDLE SubAllocatorHandle; ULONG EstimatedLzxMemory; ULONG ExtendedOptionFlags; ULONG AltExtendedOptionFlags; ULONG OldFileOriginalChecksum; ULONG OldFileOriginalTimeDate; ULONG i, j; PUCHAR p; ULONG LargestOldFileSize = 0;
HeaderInfo.OldFileInfoArray = _alloca( OldFileCount * sizeof( HEADER_OLD_FILE_INFO )); PatchArray = _alloca( OldFileCount * sizeof( PATCH_DATA ));
ZeroMemory( HeaderInfo.OldFileInfoArray, OldFileCount * sizeof( HEADER_OLD_FILE_INFO )); ZeroMemory( PatchArray, OldFileCount * sizeof( PATCH_DATA ));
if (( OldFileCount == 0 ) || ( OldFileCount > 127 )) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; }
if ( OptionFlags & PATCH_OPTION_SIGNATURE_MD5 ) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; }
if (( OptionFlags & 0x0000FFFF ) == PATCH_OPTION_USE_BEST ) { OptionFlags |= PATCH_OPTION_USE_LZX_BEST; }
for ( i = 1; i < OldFileCount; i++ ) { if ( OldFileInfoArray[ i ].RetainRangeCount != OldFileInfoArray[ 0 ].RetainRangeCount ) { SetLastError( ERROR_PATCH_RETAIN_RANGES_DIFFER ); return FALSE; }
for ( j = 0; j < OldFileInfoArray[ 0 ].RetainRangeCount; j++ ) { if (( OldFileInfoArray[ i ].RetainRangeArray[ j ].OffsetInNewFile != OldFileInfoArray[ 0 ].RetainRangeArray[ j ].OffsetInNewFile ) || ( OldFileInfoArray[ i ].RetainRangeArray[ j ].LengthInBytes != OldFileInfoArray[ 0 ].RetainRangeArray[ j ].LengthInBytes )) {
SetLastError( ERROR_PATCH_RETAIN_RANGES_DIFFER ); return FALSE; } } }
ExtendedOptionFlags = 0;
if (( OptionData ) && ( OptionData->SizeOfThisStruct >= sizeof( PATCH_OPTION_DATA ))) { ExtendedOptionFlags = OptionData->ExtendedOptionFlags; }
Success = MyMapViewOfFileByHandle( NewFileHandle, &NewFileSize, &NewFileMapped );
if ( ! Success ) {
if ( GetLastError() == ERROR_SUCCESS ) {
SetLastError( ERROR_EXTENDED_ERROR ); }
return FALSE; }
GetFileTime( NewFileHandle, NULL, NULL, &NewFileTime ); PatchFileTime = &NewFileTime;
NewFileCoffBase = 0; NewFileCoffTime = 0; NewFileResTime = 0; HeaderOldFileCount = 0; HeaderSize = 0; NewFileCrc = 0; // prevent compiler warning
ProgressPosition = 0; ProgressMaximum = 0; // prevent compiler warning
__try {
NtHeader = GetNtHeader( NewFileMapped, NewFileSize );
if ( ! ( OptionFlags & PATCH_OPTION_NO_REBASE )) { if ( NtHeader ) { NewFileCoffTime = NtHeader->FileHeader.TimeDateStamp; NewFileCoffBase = NtHeader->OptionalHeader.ImageBase; } else { OptionFlags |= PATCH_OPTION_NO_REBASE; } }
if (( NtHeader ) && ( NtHeader->OptionalHeader.CheckSum == 0 )) { OptionFlags |= PATCH_OPTION_NO_CHECKSUM; }
if ( ! ( OptionFlags & PATCH_OPTION_NO_RESTIMEFIX )) {
if ( NtHeader ) {
UP_IMAGE_RESOURCE_DIRECTORY ResDir;
ResDir = ImageDirectoryMappedAddress( NtHeader, IMAGE_DIRECTORY_ENTRY_RESOURCE, NULL, NewFileMapped, NewFileSize );
if ( ResDir ) { NewFileResTime = ResDir->TimeDateStamp; } }
if ( NewFileResTime == 0 ) { OptionFlags |= PATCH_OPTION_NO_RESTIMEFIX; } }
TryLzxBoth = FALSE;
if (( OptionFlags & PATCH_OPTION_USE_LZX_BEST ) == PATCH_OPTION_USE_LZX_BEST ) {
OptionFlags &= ~PATCH_OPTION_USE_LZX_B; // No E8 translation on first try.
if ((( ! NtHeader ) && ( *(UNALIGNED USHORT *)NewFileMapped == 0x5A4D )) || // MZ, not PE
(( NtHeader ) && ( NtHeader->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 ))) { // PE, i386
TryLzxBoth = TRUE; // Will force E8 translation on second try.
} }
else if (( OptionFlags & PATCH_OPTION_USE_LZX_BEST ) == PATCH_OPTION_USE_LZX_B ) {
//
// Caller is requesting forced E8 translation, so disable E8
// transformation.
//
if (( NtHeader ) && ( NtHeader->FileHeader.Machine == IMAGE_FILE_MACHINE_I386 )) { // PE, i386
ExtendedOptionFlags |= PATCH_TRANSFORM_NO_RELCALLS; } }
ProgressMaximum = NewFileSize * OldFileCount;
for ( i = 0; i < OldFileCount; i++ ) { OldFileSize = GetFileSize( OldFileInfoArray[ i ].OldFileHandle, NULL );
if ( LargestOldFileSize < OldFileSize ) { LargestOldFileSize = OldFileSize; }
ProgressMaximum += LzxInsertSize( OldFileSize, OptionFlags ); }
if ( TryLzxBoth ) { ProgressMaximum *= 2; }
if ( OptionFlags & PATCH_OPTION_FAIL_IF_BIGGER ) { ProgressMaximum += NewFileSize; }
Success = ProgressCallbackWrapper( ProgressCallback, CallbackContext, 0, ProgressMaximum );
if ( ! Success ) { __leave; }
for ( j = 0; j < OldFileInfoArray[ 0 ].RetainRangeCount; j++ ) { ZeroMemory( OldFileInfoArray[ 0 ].RetainRangeArray[ j ].OffsetInNewFile + NewFileMapped, OldFileInfoArray[ 0 ].RetainRangeArray[ j ].LengthInBytes ); }
NewFileCrc = Crc32( 0xFFFFFFFF, NewFileMapped, NewFileSize ) ^ 0xFFFFFFFF;
PatchBufferSize = ROUNDUP2( NewFileSize + ( NewFileSize / 256 ), 0x10000 );
Success = FALSE;
for ( i = 0; i < OldFileCount; i++ ) {
Success = MyMapViewOfFileByHandle( OldFileInfoArray[ i ].OldFileHandle, &OldFileSize, &OldFileMapped );
if ( ! Success ) { break; }
OldFileOriginalChecksum = 0; OldFileOriginalTimeDate = 0; OldFileNtHeader = NULL;
__try {
OldFileNtHeader = GetNtHeader( OldFileMapped, OldFileSize );
if ( OldFileNtHeader ) {
OldFileOriginalChecksum = OldFileNtHeader->OptionalHeader.CheckSum; OldFileOriginalTimeDate = OldFileNtHeader->FileHeader.TimeDateStamp; } }
__except( EXCEPTION_EXECUTE_HANDLER ) { }
Success = NormalizeOldFileImageForPatching( OldFileMapped, OldFileSize, OptionFlags, OptionData, NewFileCoffBase, NewFileCoffTime, OldFileInfoArray[ i ].IgnoreRangeCount, OldFileInfoArray[ i ].IgnoreRangeArray, OldFileInfoArray[ i ].RetainRangeCount, OldFileInfoArray[ i ].RetainRangeArray );
if ( Success ) {
Success = SafeCompleteCrc32( OldFileMapped, OldFileSize, &OldFileCrc );
if ( Success ) {
//
// First determine if this old file is the same as any already
// processed old files.
//
Success = FALSE;
for ( j = 0; j < HeaderOldFileCount; j++ ) {
if (( HeaderInfo.OldFileInfoArray[ j ].OldFileCrc == OldFileCrc ) && ( HeaderInfo.OldFileInfoArray[ j ].OldFileSize == OldFileSize )) {
//
// We have to remap the other old file here to make the
// comparison.
//
PUCHAR CompareFileMapped; ULONG CompareFileSize;
Success = MyMapViewOfFileByHandle( HeaderInfo.OldFileInfoArray[ j ].OldFileHandle, &CompareFileSize, &CompareFileMapped );
if ( Success ) {
ASSERT( CompareFileSize == HeaderInfo.OldFileInfoArray[ j ].OldFileSize );
NormalizeOldFileImageForPatching( CompareFileMapped, CompareFileSize, OptionFlags, OptionData, NewFileCoffBase, NewFileCoffTime, HeaderInfo.OldFileInfoArray[ j ].IgnoreRangeCount, HeaderInfo.OldFileInfoArray[ j ].IgnoreRangeArray, HeaderInfo.OldFileInfoArray[ j ].RetainRangeCount, HeaderInfo.OldFileInfoArray[ j ].RetainRangeArray );
__try { Success = ( memcmp( CompareFileMapped, OldFileMapped, OldFileSize ) == 0 ); } __except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; }
UnmapViewOfFile( CompareFileMapped );
if ( Success ) { break; } } } }
if ( ! Success ) {
//
// Now see if old file is same as new file.
//
HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryAlloc = 0; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount = 0; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryArray = NULL; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftUsageArray = NULL;
PatchBuffer = NULL; PatchDataSize = 0;
if (( NewFileCrc == OldFileCrc ) && ( NewFileSize == OldFileSize )) {
__try { Success = ( memcmp( NewFileMapped, OldFileMapped, NewFileSize ) == 0 ); } __except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; } }
if ( ! Success ) {
//
// It's a unique file, so create the patch for it.
//
// First we need to apply the transforms.
//
Transform = TRUE;
//
// NOTE: This test for NtHeader is a perf tweak
// for non-coff files. If we ever have any
// transformations for non-coff files, this
// test should be removed.
//
if (( NtHeader ) && ( OldFileNtHeader )) {
//
// See if rift table already provided by
// caller so we don't need to generate it.
//
if (( OptionData ) && ( OptionData->SizeOfThisStruct >= sizeof( PATCH_OPTION_DATA )) && ( OptionData->SymbolOptionFlags & PATCH_SYMBOL_EXTERNAL_RIFT ) && ( OptionData->OldFileSymbolPathArray ) && ( OptionData->OldFileSymbolPathArray[ i ] )) {
//
// This hidden private flag that tells us the rift information
// is already specified for us. The LPCSTR pointer at
// OptionData->OldFileSymbolPathArray[ i ] is really a
// PRIFT_TABLE pointer. Note that no validation of external
// rift data is performed (must be in ascending order with
// no OldRva duplicates).
//
// We need to be careful to treat this external rift table
// differently in that we don't want to free the arrays
// like we do for our internally allocated rift tables.
// So, mark the RiftEntryAlloc field as zero to indicate
// that the rift arrays were not internally allocated.
//
PRIFT_TABLE ExternalRiftTable = (PVOID) OptionData->OldFileSymbolPathArray[ i ];
HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryAlloc = 0; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount = ExternalRiftTable->RiftEntryCount; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryArray = ExternalRiftTable->RiftEntryArray; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftUsageArray = ExternalRiftTable->RiftUsageArray; }
else {
//
// Need to allocate rift arrays and generate rift data.
// This (NewSize+OldSize)/sizeof(RIFT) allocation will
// provide enough space for one rift entry for every
// four bytes in the files.
//
ULONG AllocCount = ( NewFileSize + OldFileSize ) / sizeof( RIFT_ENTRY );
HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount = 0; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryAlloc = AllocCount; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryArray = MyVirtualAlloc( AllocCount * sizeof( RIFT_ENTRY )); HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftUsageArray = MyVirtualAlloc( AllocCount * sizeof( UCHAR ));
if (( HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryArray == NULL ) || ( HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftUsageArray == NULL )) {
Transform = FALSE; }
else {
Transform = GenerateRiftTable( OldFileInfoArray[ i ].OldFileHandle, OldFileMapped, OldFileSize, OldFileOriginalChecksum, OldFileOriginalTimeDate, NewFileHandle, NewFileMapped, NewFileSize, OptionFlags, OptionData, i, &HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable );
ASSERT( HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount <= HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryAlloc );
#ifdef TESTCODE
printf( "\r%9d unique rift entries generated\n", HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount );#endif
} }
if ( Transform ) {
if ( HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount != 0 ) {
Transform = TransformOldFileImageForPatching( ExtendedOptionFlags, OldFileMapped, OldFileSize, NewFileResTime, &HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable ); } } }
if ( Transform ) {
PatchBuffer = MyVirtualAlloc( PatchBufferSize );
if ( PatchBuffer != NULL ) {
EstimatedLzxMemory = EstimateLzxCompressionMemoryRequirement( OldFileSize, NewFileSize, OptionFlags );
SubAllocatorHandle = CreateSubAllocator( EstimatedLzxMemory, MINIMUM_VM_ALLOCATION );
if ( SubAllocatorHandle != NULL ) {
__try { ErrorCode = CreateRawLzxPatchDataFromBuffers( OldFileMapped, OldFileSize, NewFileMapped, NewFileSize, PatchBufferSize, PatchBuffer, &PatchDataSize, OptionFlags, OptionData, SubAllocate, SubAllocatorHandle, ProgressCallback, CallbackContext, ProgressPosition, ProgressMaximum ); } __except( EXCEPTION_EXECUTE_HANDLER ) { ErrorCode = GetExceptionCode(); }
DestroySubAllocator( SubAllocatorHandle );
if ( ErrorCode == NO_ERROR ) {
Success = TRUE;
if ( TryLzxBoth ) {
AltExtendedOptionFlags = ExtendedOptionFlags;
if (( NtHeader ) && ( ! ( AltExtendedOptionFlags | PATCH_TRANSFORM_NO_RELCALLS ))) {
//
// Need to map, normalize, and transform
// old file again without E8 transform.
//
AltExtendedOptionFlags |= PATCH_TRANSFORM_NO_RELCALLS;
UnmapViewOfFile( OldFileMapped ); OldFileMapped = NULL;
Success = MyMapViewOfFileByHandle( OldFileInfoArray[ i ].OldFileHandle, &OldFileSize, &OldFileMapped );
if ( Success ) {
Success = NormalizeOldFileImageForPatching( OldFileMapped, OldFileSize, OptionFlags, OptionData, NewFileCoffBase, NewFileCoffTime, OldFileInfoArray[ i ].IgnoreRangeCount, OldFileInfoArray[ i ].IgnoreRangeArray, OldFileInfoArray[ i ].RetainRangeCount, OldFileInfoArray[ i ].RetainRangeArray );
if ( Success ) {
if ( HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount != 0 ) {
Success = TransformOldFileImageForPatching( AltExtendedOptionFlags, OldFileMapped, OldFileSize, NewFileResTime, &HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable ); } } } }
if ( Success ) {
PatchAltBuffer = MyVirtualAlloc( PatchBufferSize );
if ( PatchAltBuffer != NULL ) {
SubAllocatorHandle = CreateSubAllocator( EstimatedLzxMemory, MINIMUM_VM_ALLOCATION );
if ( SubAllocatorHandle != NULL ) {
PatchAltSize = 0; // prevent compiler warning
__try { ErrorCode = CreateRawLzxPatchDataFromBuffers( OldFileMapped, OldFileSize, NewFileMapped, NewFileSize, PatchBufferSize, PatchAltBuffer, &PatchAltSize, OptionFlags | PATCH_OPTION_USE_LZX_B, OptionData, SubAllocate, SubAllocatorHandle, ProgressCallback, CallbackContext, ProgressPosition + NewFileSize + LzxInsertSize( OldFileSize, OptionFlags ), ProgressMaximum ); } __except( EXCEPTION_EXECUTE_HANDLER ) { ErrorCode = GetExceptionCode(); }
DestroySubAllocator( SubAllocatorHandle );
if (( ErrorCode == NO_ERROR ) && ( PatchAltSize <= PatchDataSize )) { MyVirtualFree( PatchBuffer ); PatchBuffer = PatchAltBuffer; PatchDataSize = PatchAltSize; ExtendedOptionFlags = AltExtendedOptionFlags; } else { MyVirtualFree( PatchAltBuffer ); } } } } } }
else { SetLastError( ErrorCode ); } } } } }
if ( Success ) {
PatchArray[ HeaderOldFileCount ].PatchData = PatchBuffer; PatchArray[ HeaderOldFileCount ].PatchSize = PatchDataSize;
HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].OldFileHandle = OldFileInfoArray[ i ].OldFileHandle; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].OldFileSize = OldFileSize; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].OldFileCrc = OldFileCrc; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].PatchDataSize = PatchDataSize; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].IgnoreRangeCount = OldFileInfoArray[ i ].IgnoreRangeCount; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].IgnoreRangeArray = OldFileInfoArray[ i ].IgnoreRangeArray; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RetainRangeCount = OldFileInfoArray[ i ].RetainRangeCount; HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RetainRangeArray = OldFileInfoArray[ i ].RetainRangeArray;
//
// We overestimate (worst case) the possible
// header size here. Note that typical rift
// encoding size is around 5 bytes per entry,
// but we expect that to decrease when we switch
// to Huffman encoding for the rift table.
//
HeaderSize += 32; HeaderSize += HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].IgnoreRangeCount * sizeof( PATCH_IGNORE_RANGE ); HeaderSize += HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RetainRangeCount * sizeof( PATCH_RETAIN_RANGE ); HeaderSize += HeaderInfo.OldFileInfoArray[ HeaderOldFileCount ].RiftTable.RiftEntryCount * sizeof( RIFT_ENTRY );
++HeaderOldFileCount; } } } }
if ( OldFileMapped != NULL ) { UnmapViewOfFile( OldFileMapped ); OldFileMapped = NULL; }
if ( Success ) {
ProgressPosition += ( LzxInsertSize( OldFileSize, OptionFlags ) + NewFileSize ) * ( TryLzxBoth ? 2 : 1 );
Success = ProgressCallbackWrapper( ProgressCallback, CallbackContext, ProgressPosition, ProgressMaximum ); }
if ( ! Success ) { break; } } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; }
if ( Success ) {
if (( OptionFlags & PATCH_OPTION_FAIL_IF_SAME_FILE ) && ( HeaderOldFileCount == 1 ) && ( PatchArray[ 0 ].PatchSize == 0 )) {
SetLastError( ERROR_PATCH_SAME_FILE ); Success = FALSE; } }
PatchBuffer = NULL; PatchDataSize = 0;
if ( Success ) {
//
// Create header
//
Success = FALSE;
HeaderSize = ROUNDUP2( HeaderSize, 0x10000 );
PatchBuffer = MyVirtualAlloc( HeaderSize );
if ( PatchBuffer != NULL ) {
Success = TRUE;
//
// Compute size of PatchData without the header.
//
PatchDataSize = 0;
for ( i = 0; i < HeaderOldFileCount; i++ ) { PatchDataSize += PatchArray[ i ].PatchSize; }
//
// Don't need to encode NewFileResTime if the patch is simply
// a header with no patch data (new file is same as old file).
// We do still need the NewFileCoffTime and NewFileCoffBase
// though because we still need to normalize the old file.
//
if ( PatchDataSize == 0 ) { OptionFlags |= PATCH_OPTION_NO_RESTIMEFIX; NewFileResTime = 0; }
if ( ExtendedOptionFlags ) { OptionFlags |= PATCH_OPTION_EXTENDED_OPTIONS; } else { OptionFlags &= ~PATCH_OPTION_EXTENDED_OPTIONS; }
//
// Don't need to set PATCH_OPTION_LZX_LARGE unless an LZX window larger
// than 8Mb was used. This allows backwards compatibility by default for
// files smaller than 8Mb.
//
if ( OptionFlags & PATCH_OPTION_USE_LZX_LARGE ) {
if ( LzxWindowSize( LargestOldFileSize, NewFileSize, OptionFlags ) <= LZX_MAXWINDOW_8 ) {
OptionFlags &= ~PATCH_OPTION_USE_LZX_LARGE; } }
HeaderInfo.Signature = PATCH_SIGNATURE; HeaderInfo.OptionFlags = OptionFlags; HeaderInfo.ExtendedOptionFlags = ExtendedOptionFlags; HeaderInfo.OptionData = OptionData; HeaderInfo.NewFileCoffBase = NewFileCoffBase; HeaderInfo.NewFileCoffTime = NewFileCoffTime; HeaderInfo.NewFileResTime = NewFileResTime; HeaderInfo.NewFileSize = NewFileSize; HeaderInfo.NewFileCrc = NewFileCrc; HeaderInfo.OldFileCount = HeaderOldFileCount; HeaderInfo.NewFileTime = 0;
if ( ! ( OptionFlags & PATCH_OPTION_NO_TIMESTAMP )) {
HeaderInfo.NewFileTime = FileTimeToUlongTime( &NewFileTime ); PatchFileTime = NULL; }
HeaderSize = EncodePatchHeader( &HeaderInfo, PatchBuffer );
PatchDataSize += HeaderSize + sizeof( ULONG );
//
// Now we know the size of the patch file, so if we want to
// make sure it's not bigger than just compressing the new
// file, we need to compress the new file to see (the output
// of the compression is discarded -- we just want to know
// how big it would be. Obviously if the patch file is bigger
// than the raw new file, no need to compress the new file to
// see if that is smaller!
//
if ( OptionFlags & PATCH_OPTION_FAIL_IF_BIGGER ) {
if ( PatchDataSize > NewFileSize ) { SetLastError( ERROR_PATCH_BIGGER_THAN_COMPRESSED ); Success = FALSE; }
else {
EstimatedLzxMemory = EstimateLzxCompressionMemoryRequirement( 0, NewFileSize, 0 // CAB has only 2Mb window size
);
SubAllocatorHandle = CreateSubAllocator( EstimatedLzxMemory, MINIMUM_VM_ALLOCATION );
if ( SubAllocatorHandle != NULL ) {
NewFileCompressedSize = 0; // prevent compiler warning
__try { ErrorCode = RawLzxCompressBuffer( NewFileMapped, NewFileSize, 0, NULL, &NewFileCompressedSize, SubAllocate, SubAllocatorHandle, ProgressCallback, CallbackContext, ProgressPosition, ProgressMaximum ); } __except( EXCEPTION_EXECUTE_HANDLER ) { ErrorCode = GetExceptionCode(); }
DestroySubAllocator( SubAllocatorHandle );
if ( ErrorCode == NO_ERROR ) { if ( PatchDataSize > NewFileCompressedSize ) { SetLastError( ERROR_PATCH_BIGGER_THAN_COMPRESSED ); Success = FALSE; } } } }
if ( Success ) {
ProgressPosition += NewFileSize;
Success = ProgressCallbackWrapper( ProgressCallback, CallbackContext, ProgressPosition, ProgressMaximum ); } } } }
UnmapViewOfFile( NewFileMapped );
if ( Success ) {
Success = MyCreateMappedFileByHandle( PatchFileHandle, PatchDataSize, &PatchFileMapped );
if ( Success ) {
__try {
p = PatchFileMapped; CopyMemory( p, PatchBuffer, HeaderSize ); p += HeaderSize;
for ( i = 0; i < HeaderOldFileCount; i++ ) { if ( PatchArray[ i ].PatchSize != 0 ) { CopyMemory( p, PatchArray[ i ].PatchData, PatchArray[ i ].PatchSize ); p += PatchArray[ i ].PatchSize; } }
PatchFileCrc = Crc32( 0xFFFFFFFF, PatchFileMapped, PatchDataSize - sizeof( ULONG ));
*(UNALIGNED ULONG *)( PatchFileMapped + PatchDataSize - sizeof( ULONG )) = PatchFileCrc;
}
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); PatchDataSize = 0; Success = FALSE; }
MyUnmapCreatedMappedFile( PatchFileHandle, PatchFileMapped, PatchDataSize, PatchFileTime ); } }
//
// Cleanup
//
if ( PatchBuffer ) { MyVirtualFree( PatchBuffer ); }
for ( i = 0; i < OldFileCount; i++ ) { if ( PatchArray[ i ].PatchData ) { MyVirtualFree( PatchArray[ i ].PatchData ); } if ( HeaderInfo.OldFileInfoArray[ i ].RiftTable.RiftEntryAlloc ) { if ( HeaderInfo.OldFileInfoArray[ i ].RiftTable.RiftEntryArray ) { MyVirtualFree( HeaderInfo.OldFileInfoArray[ i ].RiftTable.RiftEntryArray ); } if ( HeaderInfo.OldFileInfoArray[ i ].RiftTable.RiftUsageArray ) { MyVirtualFree( HeaderInfo.OldFileInfoArray[ i ].RiftTable.RiftUsageArray ); } } }
if ( Success ) { ASSERT( ProgressPosition == ProgressMaximum ); }
if (( ! Success ) && ( GetLastError() == ERROR_SUCCESS )) {
SetLastError( ERROR_EXTENDED_ERROR ); }
return Success; }
BOOLPATCHAPIExtractPatchHeaderToFileA( IN LPCSTR PatchFileName, OUT LPCSTR PatchHeaderFileName ) { HANDLE PatchFileHandle; HANDLE HeaderFileHandle; BOOL Success = FALSE;
PatchFileHandle = CreateFileA( PatchFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
HeaderFileHandle = CreateFileA( PatchHeaderFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( HeaderFileHandle != INVALID_HANDLE_VALUE ) {
Success = ExtractPatchHeaderToFileByHandles( PatchFileHandle, HeaderFileHandle );
CloseHandle( HeaderFileHandle );
if ( ! Success ) { DeleteFileA( PatchHeaderFileName ); } }
CloseHandle( PatchFileHandle ); }
return Success; }
BOOLPATCHAPIExtractPatchHeaderToFileW( IN LPCWSTR PatchFileName, OUT LPCWSTR PatchHeaderFileName ) { HANDLE PatchFileHandle; HANDLE HeaderFileHandle; BOOL Success = FALSE;
PatchFileHandle = CreateFileW( PatchFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
HeaderFileHandle = CreateFileW( PatchHeaderFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( HeaderFileHandle != INVALID_HANDLE_VALUE ) {
Success = ExtractPatchHeaderToFileByHandles( PatchFileHandle, HeaderFileHandle );
CloseHandle( HeaderFileHandle );
if ( ! Success ) { DeleteFileW( PatchHeaderFileName ); } }
CloseHandle( PatchFileHandle ); }
return Success; }
BOOLPATCHAPIExtractPatchHeaderToFileByHandles( IN HANDLE PatchFileHandle, OUT HANDLE PatchHeaderFileHandle ) { PPATCH_HEADER_INFO HeaderInfo; HANDLE SubAllocator; PUCHAR PatchFileMapped; FILETIME PatchFileTime; ULONG PatchFileSize; ULONG PatchFileCrc; ULONG PatchHeaderSize; ULONG ActualSize; ULONG i; BOOL Success; BOOL Mapped;
Success = FALSE;
Mapped = MyMapViewOfFileByHandle( PatchFileHandle, &PatchFileSize, &PatchFileMapped );
if ( Mapped ) {
GetFileTime( PatchFileHandle, NULL, NULL, &PatchFileTime );
PatchFileCrc = 0;
SafeCompleteCrc32( PatchFileMapped, PatchFileSize, &PatchFileCrc );
if ( PatchFileCrc == 0xFFFFFFFF ) {
SubAllocator = CreateSubAllocator( 0x10000, 0x10000 );
if ( SubAllocator ) {
Success = DecodePatchHeader( PatchFileMapped, PatchFileSize, SubAllocator, &PatchHeaderSize, &HeaderInfo );
if ( Success ) {
//
// Header extraction is provided so that a header without
// the bulk of the patch data can be used to determine if
// an old file is correct for this patch header (can be
// patched).
//
// Since the extracted header will not be used to actually
// apply, we don't need any of the header data that is
// used only for transformation (RiftTable and NewResTime).
// Since NewResTime is typically encoded as one byte (as
// delta from NewCoffTime), we won't bother throwing it
// away, but we will throw away the RiftTable.
//
// Zero out the rift entry counts, then re-create the
// patch header with the zeroed rift counts (create over
// the write-copy mapped patch file buffer, then write
// that buffer to disk).
//
for ( i = 0; i < HeaderInfo->OldFileCount; i++ ) { HeaderInfo->OldFileInfoArray[ i ].RiftTable.RiftEntryCount = 0; }
__try {
PatchHeaderSize = EncodePatchHeader( HeaderInfo, PatchFileMapped );
PatchFileCrc = Crc32( 0xFFFFFFFF, PatchFileMapped, PatchHeaderSize );
*(UNALIGNED ULONG *)( PatchFileMapped + PatchHeaderSize ) = PatchFileCrc;
Success = WriteFile( PatchHeaderFileHandle, PatchFileMapped, PatchHeaderSize + sizeof( ULONG ), &ActualSize, NULL ); }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Success = FALSE; }
if ( Success ) { SetFileTime( PatchHeaderFileHandle, NULL, NULL, &PatchFileTime ); } }
DestroySubAllocator( SubAllocator ); } }
else { SetLastError( ERROR_PATCH_CORRUPT ); }
UnmapViewOfFile( PatchFileMapped ); }
return Success; }
#endif // ! PATCH_APPLY_CODE_ONLY
//
// Following group of functions and exported apis are exclusively for
// applying patches. If we're only compiling the create code, ignore
// this group of functions.
//
#ifndef PATCH_CREATE_CODE_ONLY
PVOIDSaveRetainRanges( IN PUCHAR MappedFile, IN ULONG FileSize, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN BOOL SaveFromNewFile ) { PUCHAR Buffer, p; ULONG Offset; ULONG TotalSize = 0; ULONG i;
for ( i = 0; i < RetainRangeCount; i++ ) { TotalSize += RetainRangeArray[ i ].LengthInBytes; }
Buffer = MyVirtualAlloc( TotalSize );
if ( Buffer ) {
__try {
p = Buffer;
for ( i = 0; i < RetainRangeCount; i++ ) {
Offset = SaveFromNewFile ? RetainRangeArray[ i ].OffsetInNewFile : RetainRangeArray[ i ].OffsetInOldFile;
if (( Offset + RetainRangeArray[ i ].LengthInBytes ) <= FileSize ) { CopyMemory( p, MappedFile + Offset, RetainRangeArray[ i ].LengthInBytes ); }
p += RetainRangeArray[ i ].LengthInBytes; } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); MyVirtualFree( Buffer ); Buffer = NULL; } }
return Buffer; }
BOOLCreateNewFileFromOldFileMapped( IN PUCHAR OldFileMapped, IN ULONG OldFileSize, OUT HANDLE NewFileHandle, IN PFILETIME NewFileTime, IN ULONG NewFileExpectedCrc, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN PUCHAR RetainBuffer, IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { PUCHAR NewFileMapped; ULONG NewFileCrc; BOOL Success; ULONG i;
Success = MyCreateMappedFileByHandle( NewFileHandle, OldFileSize, &NewFileMapped );
if ( Success ) {
__try {
CopyMemory( NewFileMapped, OldFileMapped, OldFileSize );
NewFileCrc = Crc32( 0xFFFFFFFF, NewFileMapped, OldFileSize ) ^ 0xFFFFFFFF;
if ( NewFileCrc == NewFileExpectedCrc ) {
for ( i = 0; i < RetainRangeCount; i++ ) { if (( RetainRangeArray[ i ].OffsetInNewFile + RetainRangeArray[ i ].LengthInBytes ) <= OldFileSize ) { CopyMemory( RetainRangeArray[ i ].OffsetInNewFile + NewFileMapped, RetainBuffer, RetainRangeArray[ i ].LengthInBytes ); } RetainBuffer += RetainRangeArray[ i ].LengthInBytes; }
Success = ProgressCallbackWrapper( ProgressCallback, CallbackContext, OldFileSize, OldFileSize ); }
else { SetLastError( ERROR_PATCH_WRONG_FILE ); OldFileSize = 0; Success = FALSE; } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode()); OldFileSize = 0; Success = FALSE; }
MyUnmapCreatedMappedFile( NewFileHandle, NewFileMapped, OldFileSize, NewFileTime ); }
return Success; }
BOOLCreateNewFileFromPatchData( IN PUCHAR OldFileMapped, IN ULONG OldFileSize, IN PUCHAR PatchData, IN ULONG PatchDataSize, OUT HANDLE NewFileHandle, IN ULONG NewFileSize, IN PFILETIME NewFileTime, IN ULONG NewFileExpectedCrc, IN ULONG RetainRangeCount, IN PPATCH_RETAIN_RANGE RetainRangeArray, IN PUCHAR RetainBuffer, IN ULONG OptionFlags, IN PVOID OptionData, IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { HANDLE SubAllocatorHandle; ULONG EstimatedLzxMemory; PUCHAR NewFileMapped; ULONG NewFileCrc; ULONG ErrorCode; BOOL Success; ULONG i;
UNREFERENCED_PARAMETER( OptionData );
Success = MyCreateMappedFileByHandle( NewFileHandle, NewFileSize, &NewFileMapped );
if ( Success ) {
ErrorCode = NO_ERROR;
EstimatedLzxMemory = EstimateLzxDecompressionMemoryRequirement( OldFileSize, NewFileSize, OptionFlags );
SubAllocatorHandle = CreateSubAllocator( EstimatedLzxMemory, MINIMUM_VM_ALLOCATION );
if ( SubAllocatorHandle != NULL ) {
__try {
ErrorCode = ApplyRawLzxPatchToBuffer( OldFileMapped, OldFileSize, PatchData, PatchDataSize, NewFileMapped, NewFileSize, OptionFlags, OptionData, SubAllocate, SubAllocatorHandle, ProgressCallback, CallbackContext, 0, NewFileSize );
if ( ErrorCode == NO_ERROR ) {
NewFileCrc = Crc32( 0xFFFFFFFF, NewFileMapped, NewFileSize ) ^ 0xFFFFFFFF;
if ( NewFileCrc == NewFileExpectedCrc ) {
for ( i = 0; i < RetainRangeCount; i++ ) { if (( RetainRangeArray[ i ].OffsetInNewFile + RetainRangeArray[ i ].LengthInBytes ) <= OldFileSize ) { CopyMemory( RetainRangeArray[ i ].OffsetInNewFile + NewFileMapped, RetainBuffer, RetainRangeArray[ i ].LengthInBytes ); } RetainBuffer += RetainRangeArray[ i ].LengthInBytes; } }
else {
ErrorCode = ERROR_PATCH_WRONG_FILE;
} }
#ifdef TESTCODE
if ( ErrorCode != NO_ERROR ) {
HANDLE hFile = CreateFile( "Wrong.out", GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( hFile != INVALID_HANDLE_VALUE ) {
DWORD Actual;
WriteFile( hFile, NewFileMapped, NewFileSize, &Actual, NULL );
CloseHandle( hFile );
} }
#endif // TESTCODE
}
__except( EXCEPTION_EXECUTE_HANDLER ) { ErrorCode = GetExceptionCode(); }
DestroySubAllocator( SubAllocatorHandle ); }
MyUnmapCreatedMappedFile( NewFileHandle, NewFileMapped, ( ErrorCode == NO_ERROR ) ? NewFileSize : 0, NewFileTime );
if ( ErrorCode == NO_ERROR ) { Success = TRUE; } else { SetLastError( ErrorCode ); Success = FALSE; } }
return Success; }
BOOLPATCHAPIApplyPatchToFileByHandlesEx( IN HANDLE PatchFileHandle, IN HANDLE OldFileHandle, OUT HANDLE NewFileHandle, IN ULONG ApplyOptionFlags, IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { PHEADER_OLD_FILE_INFO OldFileInfo; PPATCH_HEADER_INFO HeaderInfo; PPATCH_RETAIN_RANGE RetainRangeArray; ULONG RetainRangeCount; PUCHAR RetainBuffer; HANDLE SubAllocator; ULONG PatchHeaderSize; FILETIME NewFileTime; PUCHAR PatchFileMapped; ULONG PatchFileSize; ULONG PatchFileCrc; PUCHAR PatchData; PUCHAR OldFileMapped; ULONG OldFileSize; ULONG OldFileCrc; BOOL Mapped; BOOL Success; BOOL Finished; ULONG i;
Success = FALSE;
Mapped = MyMapViewOfFileByHandle( PatchFileHandle, &PatchFileSize, &PatchFileMapped );
if ( Mapped ) {
GetFileTime( PatchFileHandle, NULL, NULL, &NewFileTime );
PatchFileCrc = 0;
SafeCompleteCrc32( PatchFileMapped, PatchFileSize, &PatchFileCrc );
if ( PatchFileCrc == 0xFFFFFFFF ) {
SubAllocator = CreateSubAllocator( 0x10000, 0x10000 );
if ( SubAllocator ) {
Success = DecodePatchHeader( PatchFileMapped, PatchFileSize, SubAllocator, &PatchHeaderSize, &HeaderInfo );
if ( Success ) {
//
// Patch is valid.
//
Success = ProgressCallbackWrapper( ProgressCallback, CallbackContext, 0, HeaderInfo->NewFileSize );
if ( Success ) {
Finished = FALSE; Success = FALSE;
if (( ! ( HeaderInfo->OptionFlags & PATCH_OPTION_NO_TIMESTAMP )) && ( HeaderInfo->NewFileTime != 0 )) {
UlongTimeToFileTime( HeaderInfo->NewFileTime, &NewFileTime ); }
OldFileSize = GetFileSize( OldFileHandle, NULL );
//
// First see if the old file is really the new file.
//
if ( OldFileSize == HeaderInfo->NewFileSize ) {
Mapped = MyMapViewOfFileByHandle( OldFileHandle, &OldFileSize, &OldFileMapped );
if ( ! Mapped ) { Success = FALSE; Finished = TRUE; }
else {
RetainBuffer = NULL; OldFileCrc = 0; OldFileInfo = &HeaderInfo->OldFileInfoArray[ 0 ]; RetainRangeCount = OldFileInfo->RetainRangeCount; RetainRangeArray = OldFileInfo->RetainRangeArray;
if (( RetainRangeCount != 0 ) && ( ! ( ApplyOptionFlags & APPLY_OPTION_TEST_ONLY ))) {
RetainBuffer = SaveRetainRanges( OldFileMapped, OldFileSize, RetainRangeCount, RetainRangeArray, TRUE );
if ( RetainBuffer == NULL ) { Finished = TRUE; } }
if ( ! Finished ) {
__try {
//
// First see if they match exact, without
// normalizing.
//
for ( i = 0; i < RetainRangeCount; i++ ) { if (( RetainRangeArray[ i ].OffsetInNewFile + RetainRangeArray[ i ].LengthInBytes ) <= OldFileSize ) { ZeroMemory( OldFileMapped + RetainRangeArray[ i ].OffsetInNewFile, RetainRangeArray[ i ].LengthInBytes ); } }
OldFileCrc = Crc32( 0xFFFFFFFF, OldFileMapped, OldFileSize ) ^ 0xFFFFFFFF;
if ( OldFileCrc != HeaderInfo->NewFileCrc ) {
//
// Don't match exact, so try with
// normalizing.
//
// NOTE: We're assuming here that the
// zeroed retain ranges don't overlap
// with the binding info that we're
// correcting.
//
NormalizeOldFileImageForPatching( OldFileMapped, OldFileSize, HeaderInfo->OptionFlags, HeaderInfo->OptionData, HeaderInfo->NewFileCoffBase, HeaderInfo->NewFileCoffTime, 0, NULL, 0, NULL );
OldFileCrc = Crc32( 0xFFFFFFFF, OldFileMapped, OldFileSize ) ^ 0xFFFFFFFF; } }
__except( EXCEPTION_EXECUTE_HANDLER ) { SetLastError( GetExceptionCode() ); Finished = TRUE; }
if (( ! Finished ) && ( OldFileCrc == HeaderInfo->NewFileCrc ) && ( OldFileSize == HeaderInfo->NewFileSize )) {
Finished = TRUE;
if ( ApplyOptionFlags & APPLY_OPTION_FAIL_IF_EXACT ) { SetLastError( ERROR_PATCH_NOT_NECESSARY ); Success = FALSE; } else if ( ApplyOptionFlags & APPLY_OPTION_TEST_ONLY ) { Success = TRUE; } else { Success = CreateNewFileFromOldFileMapped( OldFileMapped, OldFileSize, NewFileHandle, &NewFileTime, HeaderInfo->NewFileCrc, RetainRangeCount, RetainRangeArray, RetainBuffer, ProgressCallback, CallbackContext ); } }
if ( RetainBuffer != NULL ) { MyVirtualFree( RetainBuffer ); } }
UnmapViewOfFile( OldFileMapped ); } }
if ( ! Finished ) {
//
// Now see if the old file matches one of the old
// files we have in our patch file. For each set
// of old file info in our patch file, we have to
// remap the old file to check it since each old
// file might have different ignore range parameters
// (we modify the buffer for the ignore ranges).
//
PatchData = PatchFileMapped + PatchHeaderSize; Success = FALSE;
for ( i = 0; ( i < HeaderInfo->OldFileCount ) && ( ! Finished ) && ( ! Success ); i++ ) {
OldFileInfo = &HeaderInfo->OldFileInfoArray[ i ];
if ( OldFileInfo->OldFileSize == OldFileSize ) {
Mapped = MyMapViewOfFileByHandle( OldFileHandle, &OldFileSize, &OldFileMapped );
if ( ! Mapped ) { Finished = TRUE; }
else {
RetainBuffer = NULL;
if (( OldFileInfo->RetainRangeCount != 0 ) && ( ! ( ApplyOptionFlags & APPLY_OPTION_TEST_ONLY ))) {
RetainBuffer = SaveRetainRanges( OldFileMapped, OldFileSize, OldFileInfo->RetainRangeCount, OldFileInfo->RetainRangeArray, FALSE );
if ( RetainBuffer == NULL ) { Finished = TRUE; } }
if ( ! Finished ) {
NormalizeOldFileImageForPatching( OldFileMapped, OldFileSize, HeaderInfo->OptionFlags, HeaderInfo->OptionData, HeaderInfo->NewFileCoffBase, HeaderInfo->NewFileCoffTime, OldFileInfo->IgnoreRangeCount, OldFileInfo->IgnoreRangeArray, OldFileInfo->RetainRangeCount, OldFileInfo->RetainRangeArray );
OldFileCrc = 0;
if (( SafeCompleteCrc32( OldFileMapped, OldFileSize, &OldFileCrc )) && ( OldFileCrc == OldFileInfo->OldFileCrc ) && ( OldFileSize == OldFileInfo->OldFileSize )) {
//
// CRC's match
//
if ( OldFileInfo->PatchDataSize == 0 ) { if ( ApplyOptionFlags & APPLY_OPTION_FAIL_IF_CLOSE ) { SetLastError( ERROR_PATCH_NOT_NECESSARY ); Finished = TRUE; } else if ( ApplyOptionFlags & APPLY_OPTION_TEST_ONLY ) { Success = TRUE; } else { Success = CreateNewFileFromOldFileMapped( OldFileMapped, OldFileSize, NewFileHandle, &NewFileTime, HeaderInfo->NewFileCrc, OldFileInfo->RetainRangeCount, OldFileInfo->RetainRangeArray, RetainBuffer, ProgressCallback, CallbackContext ); if ( ! Success ) { Finished = TRUE; } } }
else {
if ( ApplyOptionFlags & APPLY_OPTION_TEST_ONLY ) { Success = TRUE; } else if (( PatchData + OldFileInfo->PatchDataSize ) > ( PatchFileMapped + PatchFileSize )) { SetLastError( ERROR_PATCH_NOT_AVAILABLE ); Finished = TRUE; } else {
Success = TRUE;
if ( OldFileInfo->RiftTable.RiftEntryCount != 0 ) {
Success = TransformOldFileImageForPatching( HeaderInfo->ExtendedOptionFlags, OldFileMapped, OldFileSize, HeaderInfo->NewFileResTime, &OldFileInfo->RiftTable ); }
if ( Success ) {
Success = CreateNewFileFromPatchData( OldFileMapped, OldFileSize, PatchData, OldFileInfo->PatchDataSize, NewFileHandle, HeaderInfo->NewFileSize, &NewFileTime, HeaderInfo->NewFileCrc, OldFileInfo->RetainRangeCount, OldFileInfo->RetainRangeArray, RetainBuffer, HeaderInfo->OptionFlags, HeaderInfo->OptionData, ProgressCallback, CallbackContext ); }
if ( ! Success ) { Finished = TRUE; } } } }
if ( RetainBuffer != NULL ) { MyVirtualFree( RetainBuffer ); } }
UnmapViewOfFile( OldFileMapped ); } }
PatchData += OldFileInfo->PatchDataSize; }
if (( ! Finished ) && ( ! Success )) { SetLastError( ERROR_PATCH_WRONG_FILE ); } } } }
DestroySubAllocator( SubAllocator ); } }
else { SetLastError( ERROR_PATCH_CORRUPT ); }
UnmapViewOfFile( PatchFileMapped ); }
if (( ! Success ) && ( GetLastError() == ERROR_SUCCESS )) {
SetLastError( ERROR_EXTENDED_ERROR ); }
return Success; }
BOOLPATCHAPITestApplyPatchToFileByHandles( IN HANDLE PatchFileHandle, // requires GENERIC_READ access
IN HANDLE OldFileHandle, // requires GENERIC_READ access
IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileByHandles( PatchFileHandle, OldFileHandle, INVALID_HANDLE_VALUE, ApplyOptionFlags | APPLY_OPTION_TEST_ONLY ); }
BOOLPATCHAPIApplyPatchToFileByHandles( IN HANDLE PatchFileHandle, // requires GENERIC_READ access
IN HANDLE OldFileHandle, // requires GENERIC_READ access
OUT HANDLE NewFileHandle, // requires GENERIC_READ | GENERIC_WRITE
IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileByHandlesEx( PatchFileHandle, OldFileHandle, NewFileHandle, ApplyOptionFlags, NULL, NULL ); }
BOOLPATCHAPITestApplyPatchToFileA( IN LPCSTR PatchFileName, IN LPCSTR OldFileName, IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileA( PatchFileName, OldFileName, INVALID_HANDLE_VALUE, ApplyOptionFlags | APPLY_OPTION_TEST_ONLY ); }
BOOLPATCHAPIApplyPatchToFileA( IN LPCSTR PatchFileName, IN LPCSTR OldFileName, OUT LPCSTR NewFileName, IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileExA( PatchFileName, OldFileName, NewFileName, ApplyOptionFlags, NULL, NULL ); }
BOOLPATCHAPIApplyPatchToFileExA( IN LPCSTR PatchFileName, IN LPCSTR OldFileName, OUT LPCSTR NewFileName, IN ULONG ApplyOptionFlags, IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { HANDLE PatchFileHandle; HANDLE OldFileHandle; HANDLE NewFileHandle; BOOL Success = FALSE;
PatchFileHandle = CreateFileA( PatchFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
OldFileHandle = CreateFileA( OldFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( OldFileHandle != INVALID_HANDLE_VALUE ) {
NewFileHandle = CreateFileA( NewFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( NewFileHandle != INVALID_HANDLE_VALUE ) {
Success = ApplyPatchToFileByHandlesEx( PatchFileHandle, OldFileHandle, NewFileHandle, ApplyOptionFlags, ProgressCallback, CallbackContext );
CloseHandle( NewFileHandle );
if ( ! Success ) { DeleteFileA( NewFileName ); } }
CloseHandle( OldFileHandle ); }
CloseHandle( PatchFileHandle ); }
return Success; }
BOOLPATCHAPITestApplyPatchToFileW( IN LPCWSTR PatchFileName, IN LPCWSTR OldFileName, IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileW( PatchFileName, OldFileName, INVALID_HANDLE_VALUE, ApplyOptionFlags | APPLY_OPTION_TEST_ONLY ); }
BOOLPATCHAPIApplyPatchToFileW( IN LPCWSTR PatchFileName, IN LPCWSTR OldFileName, OUT LPCWSTR NewFileName, IN ULONG ApplyOptionFlags ) { return ApplyPatchToFileExW( PatchFileName, OldFileName, NewFileName, ApplyOptionFlags, NULL, NULL ); }
BOOLPATCHAPIApplyPatchToFileExW( IN LPCWSTR PatchFileName, IN LPCWSTR OldFileName, OUT LPCWSTR NewFileName, IN ULONG ApplyOptionFlags, IN PPATCH_PROGRESS_CALLBACK ProgressCallback, IN PVOID CallbackContext ) { HANDLE PatchFileHandle; HANDLE OldFileHandle; HANDLE NewFileHandle; BOOL Success = FALSE;
PatchFileHandle = CreateFileW( PatchFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( PatchFileHandle != INVALID_HANDLE_VALUE ) {
OldFileHandle = CreateFileW( OldFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL );
if ( OldFileHandle != INVALID_HANDLE_VALUE ) {
NewFileHandle = CreateFileW( NewFileName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
if ( NewFileHandle != INVALID_HANDLE_VALUE ) {
Success = ApplyPatchToFileByHandlesEx( PatchFileHandle, OldFileHandle, NewFileHandle, ApplyOptionFlags, ProgressCallback, CallbackContext );
CloseHandle( NewFileHandle );
if ( ! Success ) { DeleteFileW( NewFileName ); } }
CloseHandle( OldFileHandle ); }
CloseHandle( PatchFileHandle ); }
return Success; }
#endif // ! PATCH_CREATE_CODE_ONLY
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