#include <windows.h>
#include "..\..\inc\nt_rsa.h"
#include "..\..\inc\rsa.h"
#include "winperf.h"

LPBSAFE_PUB_KEY		PUB;
LPBSAFE_PRV_KEY		PRV;

BYTE RandState[20];

unsigned char pubmodulus[] =
{
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x3d, 0x3a, 0x5e, 0xbd, 0x72, 0x43, 0x3e, 0xc9,
0x4d, 0xbb, 0xc1, 0x1e, 0x4a, 0xba, 0x5f, 0xcb,
0x3e, 0x88, 0x20, 0x87, 0xef, 0xf5, 0xc1, 0xe2,
0xd7, 0xb7, 0x6b, 0x9a, 0xf2, 0x52, 0x45, 0x95,
0xce, 0x63, 0x65, 0x6b, 0x58, 0x3a, 0xfe, 0xef,
0x7c, 0xe7, 0xbf, 0xfe, 0x3d, 0xf6, 0x5c, 0x7d,
0x6c, 0x5e, 0x06, 0x09, 0x1a, 0xf5, 0x61, 0xbb,
0x20, 0x93, 0x09, 0x5f, 0x05, 0x6d, 0xea, 0x87,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

unsigned char prvmodulus[] =
{
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x3d, 0x3a, 0x5e, 0xbd,
0x72, 0x43, 0x3e, 0xc9, 0x4d, 0xbb, 0xc1, 0x1e,
0x4a, 0xba, 0x5f, 0xcb, 0x3e, 0x88, 0x20, 0x87,
0xef, 0xf5, 0xc1, 0xe2, 0xd7, 0xb7, 0x6b, 0x9a,
0xf2, 0x52, 0x45, 0x95, 0xce, 0x63, 0x65, 0x6b,
0x58, 0x3a, 0xfe, 0xef, 0x7c, 0xe7, 0xbf, 0xfe,
0x3d, 0xf6, 0x5c, 0x7d, 0x6c, 0x5e, 0x06, 0x09,
0x1a, 0xf5, 0x61, 0xbb, 0x20, 0x93, 0x09, 0x5f,
0x05, 0x6d, 0xea, 0x87, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x3f, 0xbd, 0x29, 0x20,
0x57, 0xd2, 0x3b, 0xf1, 0x07, 0xfa, 0xdf, 0xc1,
0x16, 0x31, 0xe4, 0x95, 0xea, 0xc1, 0x2a, 0x46,
0x2b, 0xad, 0x88, 0x57, 0x55, 0xf0, 0x57, 0x58,
0xc6, 0x6f, 0x95, 0xeb, 0x00, 0x00, 0x00, 0x00,
0x83, 0xdd, 0x9d, 0xd0, 0x03, 0xb1, 0x5a, 0x9b,
0x9e, 0xb4, 0x63, 0x02, 0x43, 0x3e, 0xdf, 0xb0,
0x52, 0x83, 0x5f, 0x6a, 0x03, 0xe7, 0xd6, 0x78,
0x45, 0x83, 0x6a, 0x5b, 0xc4, 0xcb, 0xb1, 0x93,
0x00, 0x00, 0x00, 0x00, 0x65, 0x9d, 0x43, 0xe8,
0x48, 0x17, 0xcd, 0x29, 0x7e, 0xb9, 0x26, 0x5c,
0x79, 0x66, 0x58, 0x61, 0x72, 0x86, 0x6a, 0xa3,
0x63, 0xad, 0x63, 0xb8, 0xe1, 0x80, 0x4c, 0x0f,
0x36, 0x7d, 0xd9, 0xa6, 0x00, 0x00, 0x00, 0x00,
0x75, 0x3f, 0xef, 0x5a, 0x01, 0x5f, 0xf6, 0x0e,
0xd7, 0xcd, 0x59, 0x1c, 0xc6, 0xec, 0xde, 0xf3,
0x5a, 0x03, 0x09, 0xff, 0xf5, 0x23, 0xcc, 0x90,
0x27, 0x1d, 0xaa, 0x29, 0x60, 0xde, 0x05, 0x6e,
0x00, 0x00, 0x00, 0x00, 0xc0, 0x17, 0x0e, 0x57,
0xf8, 0x9e, 0xd9, 0x5c, 0xf5, 0xb9, 0x3a, 0xfc,
0x0e, 0xe2, 0x33, 0x27, 0x59, 0x1d, 0xd0, 0x97,
0x4a, 0xb1, 0xb1, 0x1f, 0xc3, 0x37, 0xd1, 0xd6,
0xe6, 0x9b, 0x35, 0xab, 0x00, 0x00, 0x00, 0x00,
0x87, 0xa7, 0x19, 0x32, 0xda, 0x11, 0x87, 0x55,
0x58, 0x00, 0x16, 0x16, 0x25, 0x65, 0x68, 0xf8,
0x24, 0x3e, 0xe6, 0xfa, 0xe9, 0x67, 0x49, 0x94,
0xcf, 0x92, 0xcc, 0x33, 0x99, 0xe8, 0x08, 0x60,
0x17, 0x9a, 0x12, 0x9f, 0x24, 0xdd, 0xb1, 0x24,
0x99, 0xc7, 0x3a, 0xb8, 0x0a, 0x7b, 0x0d, 0xdd,
0x35, 0x07, 0x79, 0x17, 0x0b, 0x51, 0x9b, 0xb3,
0xc7, 0x10, 0x01, 0x13, 0xe7, 0x3f, 0xf3, 0x5f,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};

BOOL initkey(void)
{
    DWORD       bits;

    PUB = (LPBSAFE_PUB_KEY)pubmodulus;
    
    PUB->magic = RSA1;
    PUB->keylen = 0x48;
    PUB->bitlen = 0x0200;
    PUB->datalen = 0x3f;
    PUB->pubexp = 0xc0887b5b;

    PRV = (LPBSAFE_PRV_KEY)prvmodulus;
    PRV->magic = RSA2;
    PRV->keylen = 0x48;
    PRV->bitlen = 0x0200;
    PRV->datalen = 0x3f;
    PRV->pubexp = 0xc0887b5b;

    bits = PRV->bitlen;

    return TRUE;

}

void memnuke(volatile BYTE *pData, DWORD dwLen)
{
	DWORD	i;

	for(i=0;i<dwLen;i++)
	{
	 	pData[i] = 0x00;
		pData[i] = 0xff;
		pData[i] = 0x00;
	}

	return;
}

BOOL				// Keep as BOOL for the future
GenRandom (ULONG huid, BYTE *pbBuffer, size_t dwLength)
	{
	BYTE 	Randoms[20];
	long	i;
	int		index=0;
	SYSTEMTIME	lpSysTime;
	LARGE_INTEGER liPerfCount;
	MEMORYSTATUS	lpmstMemStat;
	POINT			Point;
	RC4_KEYSTRUCT	RC4Struct;
	BYTE			*pbTmp;

	DWORD	Type;
	LONG	lReturnCode;
	char	pReturnedData[100];			//good enough guesstimate (?)
	DWORD	dwMemPerfDataLen = 100;
	PERF_DATA_BLOCK	*pPDBlock;


	//mouse
	if (GetCursorPos(&Point))
		{
		Randoms[index++] =  LOBYTE(Point.x) ^ HIBYTE(Point.x);
		Randoms[index++] =  LOBYTE(Point.y) ^ HIBYTE(Point.y);
		}

	//local time: seconds and milliseconds
	GetLocalTime(&lpSysTime);
		Randoms[index++] = LOBYTE(lpSysTime.wMilliseconds);
		Randoms[index++] = HIBYTE(lpSysTime.wMilliseconds);
		Randoms[index++] = LOBYTE(lpSysTime.wSecond) ^ LOBYTE(lpSysTime.wMinute);

	//performance counter (millisecond counters of machine time)
	if (QueryPerformanceCounter(&liPerfCount))
		{
//		printf("Performance Counters\n");
		Randoms[index++] = (LOBYTE(LOWORD(liPerfCount.LowPart)) ^ LOBYTE(LOWORD(liPerfCount.HighPart)));
		Randoms[index++] = (HIBYTE(LOWORD(liPerfCount.LowPart)) ^ LOBYTE(LOWORD(liPerfCount.HighPart)));
		Randoms[index++] = (LOBYTE(HIWORD(liPerfCount.LowPart)) ^ LOBYTE(LOWORD(liPerfCount.HighPart)));
		Randoms[index++] = (HIBYTE(HIWORD(liPerfCount.LowPart)) ^ LOBYTE(LOWORD(liPerfCount.HighPart)));
		}

	//memory status report: available resources
	GlobalMemoryStatus(&lpmstMemStat);
		//only use hiwords, since lowwords always zero
		Randoms[index++] = LOBYTE(HIWORD(lpmstMemStat.dwAvailPhys));
		Randoms[index++] = HIBYTE(HIWORD(lpmstMemStat.dwAvailPhys));

		Randoms[index++] = LOBYTE(HIWORD(lpmstMemStat.dwAvailPageFile));
		Randoms[index++] = HIBYTE(HIWORD(lpmstMemStat.dwAvailPageFile));

		Randoms[index++] = LOBYTE(HIWORD(lpmstMemStat.dwAvailVirtual));
		//high byte doesn't change much

	//query high-res 100ns timer
	lReturnCode = RegQueryValueEx(HKEY_PERFORMANCE_DATA,
		TEXT("2"),
		NULL,
		&Type,
		(BYTE *) pReturnedData,
		&dwMemPerfDataLen);

	pPDBlock = (PERF_DATA_BLOCK *)pReturnedData;

	if (lReturnCode == ERROR_SUCCESS)
		{
		Randoms[index++] = LOBYTE(LOWORD(pPDBlock->PerfTime100nSec.LowPart)) ^ LOBYTE(LOWORD(pPDBlock->PerfTime100nSec.HighPart));
		Randoms[index++] = HIBYTE(LOWORD(pPDBlock->PerfTime100nSec.LowPart)) ^ LOBYTE(LOWORD(pPDBlock->PerfTime100nSec.HighPart));
		Randoms[index++] = LOBYTE(HIWORD(pPDBlock->PerfTime100nSec.LowPart)) ^ LOBYTE(LOWORD(pPDBlock->PerfTime100nSec.HighPart));
		Randoms[index++] = HIBYTE(HIWORD(pPDBlock->PerfTime100nSec.LowPart)) ^ LOBYTE(LOWORD(pPDBlock->PerfTime100nSec.HighPart));
		}

	//now we have %index% - 1 bytes of data! XOR with previous random data and
	// use this as the seed for RC4 stream, flip around and XOR
	for (i=0; i < 20; i++) {
		RandState[i] ^= Randoms[19-i];
	}
	rc4_key (&RC4Struct, 20, RandState);
	
	//now call RC4 and generate bits
	rc4 (&RC4Struct, dwLength, pbBuffer);

	// scrub rc4 struct & random work area
	pbTmp = (unsigned char *)&RC4Struct;
	memnuke(pbTmp, 258);
	memnuke(Randoms, 20);

	return TRUE;
	}