//===============================================================================================//
// Copyright (c) 2012, Stephen Fewer of Harmony Security (www.harmonysecurity.com)
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without modification, are permitted 
// provided that the following conditions are met:
// 
//     * Redistributions of source code must retain the above copyright notice, this list of 
// conditions and the following disclaimer.
// 
//     * Redistributions in binary form must reproduce the above copyright notice, this list of 
// conditions and the following disclaimer in the documentation and/or other materials provided 
// with the distribution.
// 
//     * Neither the name of Harmony Security nor the names of its contributors may be used to
// endorse or promote products derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR 
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
// POSSIBILITY OF SUCH DAMAGE.
//===============================================================================================//
#ifndef _REFLECTIVEDLLINJECTION_REFLECTIVELOADER_H
#define _REFLECTIVEDLLINJECTION_REFLECTIVELOADER_H
//===============================================================================================//
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <intrin.h>

#include "ReflectiveDLLInjection.h"

typedef HMODULE(WINAPI * LOADLIBRARYA)(LPCSTR);
typedef FARPROC(WINAPI * GETPROCADDRESS)(HMODULE, LPCSTR);
typedef LPVOID(WINAPI * VIRTUALALLOC)(LPVOID, SIZE_T, DWORD, DWORD);
typedef DWORD(NTAPI * NTFLUSHINSTRUCTIONCACHE)(HANDLE, PVOID, ULONG);

#define KERNEL32DLL_HASH				0x6A4ABC5B
#define NTDLLDLL_HASH					0x3CFA685D

#define LOADLIBRARYA_HASH				0xEC0E4E8E
#define GETPROCADDRESS_HASH				0x7C0DFCAA
#define VIRTUALALLOC_HASH				0x91AFCA54
#define NTFLUSHINSTRUCTIONCACHE_HASH	0x534C0AB8

#define IMAGE_REL_BASED_ARM_MOV32A		5
#define IMAGE_REL_BASED_ARM_MOV32T		7

#define ARM_MOV_MASK					(DWORD)(0xFBF08000)
#define ARM_MOV_MASK2					(DWORD)(0xFBF08F00)
#define ARM_MOVW						0xF2400000
#define ARM_MOVT						0xF2C00000

#define HASH_KEY						13
//===============================================================================================//
#pragma intrinsic( _rotr )

__forceinline DWORD ror(DWORD d)
{
	return _rotr(d, HASH_KEY);
}

__forceinline DWORD hash(char * c)
{
	register DWORD h = 0;
	do
	{
		h = ror(h);
		h += *c;
	} while (*++c);

	return h;
}
//===============================================================================================//
typedef struct _UNICODE_STR
{
	USHORT Length;
	USHORT MaximumLength;
	PWSTR pBuffer;
} UNICODE_STR, *PUNICODE_STR;

// WinDbg> dt -v ntdll!_LDR_DATA_TABLE_ENTRY
//__declspec( align(8) ) 
typedef struct _LDR_DATA_TABLE_ENTRY
{
	//LIST_ENTRY InLoadOrderLinks; // As we search from PPEB_LDR_DATA->InMemoryOrderModuleList we dont use the first entry.
	LIST_ENTRY InMemoryOrderModuleList;
	LIST_ENTRY InInitializationOrderModuleList;
	PVOID DllBase;
	PVOID EntryPoint;
	ULONG SizeOfImage;
	UNICODE_STR FullDllName;
	UNICODE_STR BaseDllName;
	ULONG Flags;
	SHORT LoadCount;
	SHORT TlsIndex;
	LIST_ENTRY HashTableEntry;
	ULONG TimeDateStamp;
} LDR_DATA_TABLE_ENTRY, *PLDR_DATA_TABLE_ENTRY;

// WinDbg> dt -v ntdll!_PEB_LDR_DATA
typedef struct _PEB_LDR_DATA //, 7 elements, 0x28 bytes
{
	DWORD dwLength;
	DWORD dwInitialized;
	LPVOID lpSsHandle;
	LIST_ENTRY InLoadOrderModuleList;
	LIST_ENTRY InMemoryOrderModuleList;
	LIST_ENTRY InInitializationOrderModuleList;
	LPVOID lpEntryInProgress;
} PEB_LDR_DATA, *PPEB_LDR_DATA;

// WinDbg> dt -v ntdll!_PEB_FREE_BLOCK
typedef struct _PEB_FREE_BLOCK // 2 elements, 0x8 bytes
{
	struct _PEB_FREE_BLOCK * pNext;
	DWORD dwSize;
} PEB_FREE_BLOCK, *PPEB_FREE_BLOCK;

// struct _PEB is defined in Winternl.h but it is incomplete
// WinDbg> dt -v ntdll!_PEB
typedef struct __PEB // 65 elements, 0x210 bytes
{
	BYTE bInheritedAddressSpace;
	BYTE bReadImageFileExecOptions;
	BYTE bBeingDebugged;
	BYTE bSpareBool;
	LPVOID lpMutant;
	LPVOID lpImageBaseAddress;
	PPEB_LDR_DATA pLdr;
	LPVOID lpProcessParameters;
	LPVOID lpSubSystemData;
	LPVOID lpProcessHeap;
	PRTL_CRITICAL_SECTION pFastPebLock;
	LPVOID lpFastPebLockRoutine;
	LPVOID lpFastPebUnlockRoutine;
	DWORD dwEnvironmentUpdateCount;
	LPVOID lpKernelCallbackTable;
	DWORD dwSystemReserved;
	DWORD dwAtlThunkSListPtr32;
	PPEB_FREE_BLOCK pFreeList;
	DWORD dwTlsExpansionCounter;
	LPVOID lpTlsBitmap;
	DWORD dwTlsBitmapBits[2];
	LPVOID lpReadOnlySharedMemoryBase;
	LPVOID lpReadOnlySharedMemoryHeap;
	LPVOID lpReadOnlyStaticServerData;
	LPVOID lpAnsiCodePageData;
	LPVOID lpOemCodePageData;
	LPVOID lpUnicodeCaseTableData;
	DWORD dwNumberOfProcessors;
	DWORD dwNtGlobalFlag;
	LARGE_INTEGER liCriticalSectionTimeout;
	DWORD dwHeapSegmentReserve;
	DWORD dwHeapSegmentCommit;
	DWORD dwHeapDeCommitTotalFreeThreshold;
	DWORD dwHeapDeCommitFreeBlockThreshold;
	DWORD dwNumberOfHeaps;
	DWORD dwMaximumNumberOfHeaps;
	LPVOID lpProcessHeaps;
	LPVOID lpGdiSharedHandleTable;
	LPVOID lpProcessStarterHelper;
	DWORD dwGdiDCAttributeList;
	LPVOID lpLoaderLock;
	DWORD dwOSMajorVersion;
	DWORD dwOSMinorVersion;
	WORD wOSBuildNumber;
	WORD wOSCSDVersion;
	DWORD dwOSPlatformId;
	DWORD dwImageSubsystem;
	DWORD dwImageSubsystemMajorVersion;
	DWORD dwImageSubsystemMinorVersion;
	DWORD dwImageProcessAffinityMask;
	DWORD dwGdiHandleBuffer[34];
	LPVOID lpPostProcessInitRoutine;
	LPVOID lpTlsExpansionBitmap;
	DWORD dwTlsExpansionBitmapBits[32];
	DWORD dwSessionId;
	ULARGE_INTEGER liAppCompatFlags;
	ULARGE_INTEGER liAppCompatFlagsUser;
	LPVOID lppShimData;
	LPVOID lpAppCompatInfo;
	UNICODE_STR usCSDVersion;
	LPVOID lpActivationContextData;
	LPVOID lpProcessAssemblyStorageMap;
	LPVOID lpSystemDefaultActivationContextData;
	LPVOID lpSystemAssemblyStorageMap;
	DWORD dwMinimumStackCommit;
} _PEB, *_PPEB;

typedef struct
{
	WORD	offset : 12;
	WORD	type : 4;
} IMAGE_RELOC, *PIMAGE_RELOC;
//===============================================================================================//
#endif
//===============================================================================================//

