/*

* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* (c) 1999 Symbian Ltd

*

*/

/**

 @file

*/

#include <e32base.h>

#include <e32std.h>

#include <e32test.h>

#include <random.h>

#include <f32file.h>

RTest test(_L("Random Number Generator Tests"));

TInt gNumberOfRandomNumbers=10000;

/** Wraps a console and logs output to a file. */

class CTestConsole:public CConsoleBase

	{

	public:

		static CTestConsole* NewL(CConsoleBase* aCon, const TDesC& aFilename);

		TInt Create(const TDesC16& aTitle,TSize aSize) {return iCon->Create(aTitle,aSize);};

		void Read(TRequestStatus& aStatus) {iCon->Read(aStatus);};

		void ReadCancel(void) {iCon->ReadCancel();};

		void Write(const TDesC16& aString);

		TPoint CursorPos(void) const {return iCon->CursorPos();};

		void SetCursorPosAbs(const TPoint& aPos) {iCon->SetCursorPosAbs(aPos);};

		void SetCursorPosRel(const TPoint& aPos) {iCon->SetCursorPosRel(aPos);};

		void SetCursorHeight(TInt aHeight) {iCon->SetCursorHeight(aHeight);};

		void SetTitle(const TDesC16& aTitle) {iCon->SetTitle(aTitle);};

		void ClearScreen(void) {iCon->ClearScreen();};

		void ClearToEndOfLine(void) {iCon->ClearToEndOfLine();};

		TSize ScreenSize(void) const {return iCon->ScreenSize();};

		TKeyCode KeyCode(void) const {return iCon->KeyCode();};

		TUint KeyModifiers(void) const {return iCon->KeyModifiers();};

		~CTestConsole(void);

	private:

		CTestConsole(CConsoleBase* aCon);

	    void ConstructL(const TDesC& aFilename);

	    CConsoleBase* iCon;  ///< Pointer to wrapped console, we don't own this

	    RFs iFs;

	    RFile iFile;		 ///< Log file

	};

CTestConsole* CTestConsole::NewL(CConsoleBase* aCon, const TDesC& aFilename)

	{

	CTestConsole* self;

	self=new (ELeave) CTestConsole(aCon);

	CleanupStack::PushL(self);

	self->ConstructL(aFilename);

	CleanupStack::Pop(self);

	return self;

	}

CTestConsole::CTestConsole(CConsoleBase* aCon) :

	CConsoleBase(), iCon(aCon)

	{

	}

void CTestConsole::ConstructL(const TDesC& aFilename)

	{

	User::LeaveIfError(iFs.Connect());

	User::LeaveIfError(iFile.Replace(iFs,aFilename,EFileShareAny|EFileWrite));

	}

CTestConsole::~CTestConsole(void)

	{

	iFile.Close();

	iFs.Close();

	}

void CTestConsole::Write(const TDesC16& aString)

	{

	iCon->Write(aString);

	TUint8 space[200];

	TPtr8 ptr(space,200);

	ptr.Copy(aString);

	iFile.Write(ptr);

	}

void Monobit(const TUint8* aData)

	{

	const TInt bitcount[256]=

		{ 0,1,1,2,1,2,2,3,		// 00-07

		  1,2,2,3,2,3,3,4,		// 08-0f

		  1,2,2,3,2,3,3,4,		// 10-17

		  2,3,3,4,3,4,4,5,		// 18-1f

		  1,2,2,3,2,3,3,4,		// 20-27

		  2,3,3,4,3,4,4,5,		// 28-2f

		  2,3,3,4,3,4,4,5,		// 30-37

		  3,4,4,5,4,5,5,6,		// 38-3f

		  1,2,2,3,2,3,3,4,		// 40-47

		  2,3,3,4,3,4,4,5,		// 48-4f

		  2,3,3,4,3,4,4,5,		// 50-57

		  3,4,4,5,4,5,5,6,		// 58-5f

		  2,3,3,4,3,4,4,5,		// 60-67

		  3,4,4,5,4,5,5,6,		// 68-6f

		  3,4,4,5,4,5,5,6,		// 70-77

		  4,5,5,6,5,6,6,7,		// 78-7f

		  1,2,2,3,2,3,3,4,		// 80-87

		  2,3,3,4,3,4,4,5,		// 88-8f

		  2,3,3,4,3,4,4,5,		// 90-97

		  3,4,4,5,4,5,5,6,		// 98-9f

		  2,3,3,4,3,4,4,5,		// a0-a7

		  3,4,4,5,4,5,5,6,		// a8-af

		  3,4,4,5,4,5,5,6,		// b0-b7

		  4,5,5,6,5,6,6,7,		// b8-bf

		  2,3,3,4,3,4,4,5,		// c0-c7

		  3,4,4,5,4,5,5,6,		// c8-cf

		  3,4,4,5,4,5,5,6,		// d0-d7

		  4,5,5,6,5,6,6,7,		// d8-df

		  3,4,4,5,4,5,5,6,		// e0-e7

		  4,5,5,6,5,6,6,7,		// e8-ef

		  4,5,5,6,5,6,6,7,		// f0-f7

		  5,6,6,7,6,7,7,8		// f8-ff

		};

	TInt total=0;

	TInt i;

	for (i=0;i<2500;i++)

		{

		total+=bitcount[aData[i]];

		}

	test.Printf(_L("    Total bitcount %d\r\n"),total);

	if ((total>9654)&&(total<10346))

		{

		test.Printf(_L("    Passed Monobit\r\n"));

		}

	else

		{

		test.Printf(_L("    ***FAILED!\r\n"));

		User::Panic(_L("t_random.exe"), KErrGeneral);

		}

	}

void Poker(const TUint8* aData)

	{

	TInt f[16]= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

	TInt i;

	for (i=0;i<2500;i++)

		{

		f[(aData[i]&0x0f)]++;

		f[((aData[i]&0xf0)>>4)]++;

		}

	TReal x=0;

	for (i=0;i<16;i++)

		{

		x+=f[i]*f[i];

		}

	x*=16;

	x/=5000;

	x-=5000;

	if ((x>1.03)&&(x<57.4))

		{

		test.Printf(_L("    Passed poker test\r\n"));

		}

	else

		{

		test.Printf(_L("    ***FAILED poker test\r\n"));

		User::Panic(_L("t_random.exe"), KErrGeneral);

		}

	}

void Runs(const TUint8* aData)

	{

	TInt i;

	TInt lastbit=0;

	TInt count[7][2]={

		{ 0,0 },

		{ 0,0 },

		{ 0,0 },

		{ 0,0 },

		{ 0,0 },

		{ 0,0 },

		{ 0,0 }

		};

	TInt thisrun=0;

	TInt longrun=0;

	for (i=0;i<2500;i++)

		{

		TInt bit;

		for (bit=0;bit<8;bit++)

			{

			if (((aData[i]>>bit)&1)==lastbit)

				{

				thisrun++;

				}

			else

				{

				if (thisrun<5)

					{

					count[thisrun][lastbit]++;

					}

				else

					{

					count[5][lastbit]++;

					}

				lastbit^=1;

				if (thisrun>longrun)

					{

					longrun=thisrun;

					}

				thisrun=0;

				}

			}

		}

	TInt bound[6][2]=

		{

			{2267,2733},

			{1079,1421},

			{ 502, 748},

			{ 223, 402},

			{  90, 223},

			{  90, 223}

		};

	TBool failed=EFalse;

	for (i=0;i<6;i++)

		{

		if (!((count[i][0]>bound[i][0])&&(count[i][0]<bound[i][1])))

			{

			test.Printf(_L("    ***FAILED runs test\r\n"));

			failed=ETrue;

			}

		if (!((count[i][1]>bound[i][0])&&(count[i][1]<bound[i][1])))

			{

			test.Printf(_L("    ***FAILED runs test\r\n"));

			failed=ETrue;

			}

		}

	if (!failed)

		{

		test.Printf(_L("    Passed runs test\r\n"));

		}

	if ( (longrun>34) || (failed) )

		{

		test.Printf(_L("    ***FAILED longrun test\r\n"));

		User::Panic(_L("t_random.exe"), KErrGeneral);

		}

	}

void FIPSTest(const TUint8* aData)

//	Run some basic tests to check it's returned some numbers

//	These will panic if a failure is detected

	{

	Monobit(aData);

	Poker(aData);

	Runs(aData);

	}

void WriteFile(const TUint8* aData,const TDesC& aFileName)

	{

	RFs fs;

	fs.Connect();

	RFile file;

	TInt err;

	err=file.Open(fs,aFileName,EFileShareAny|EFileWrite);

	if (err)

		{

		if (file.Create(fs,aFileName,EFileShareAny|EFileWrite))

			{

			return;

			}

		}

	TPtrC8 ptr(aData,gNumberOfRandomNumbers);

	TInt size;

	file.Size(size);

	file.Write(size,ptr);

	file.Close();

	fs.Close();

	FIPSTest(aData);

	}

void DoTestsL(void)

	{

	test.Printf(_L("  Run random tests with normal salting\r\n"));

	TInt i;

	TBuf8<16> buf2;

	for (i=0;i<16;i++)

		{

		buf2.SetLength(i);

		TRandom::RandomL(buf2);

		}

	HBufC8* buf=HBufC8::NewMaxL(gNumberOfRandomNumbers);

	TPtr8 buffer=buf->Des();

	for (i=0;i<11;i++)

		{

		User::After(10000000);

		TPtr8 thePtr(buf->Des());

		thePtr.FillZ();

	//	Generate the random data	

		TRandom::RandomL(buffer);

		if (buf->Length()!=gNumberOfRandomNumbers)

			User::Leave(KErrGeneral);

		WriteFile(buffer.Ptr(),_L("User.rnd"));

		test.Printf(_L("."));

		}

	delete buf;

	}

void TestsL(void)

	{

	TDriveUnit sysDrive (RFs::GetSystemDrive());

	TBuf<64> logFile (sysDrive.Name());

	logFile.Append(_L("\\t_random.log"));

	CTestConsole* con = CTestConsole::NewL(test.Console(), logFile);

	test.SetConsole(con);

	DoTestsL();

	//	If test reached here, no tests failed, otherwise it would have panicked

	//	and terminated prematurely. Print this out for tester's reference.	

	test.Printf(_L("\n0 tests failed out of 11\r\n"));

	}

GLDEF_C TInt E32Main(void)

	{

	CTrapCleanup* cleanup;

	cleanup=CTrapCleanup::New();

	__UHEAP_MARK;

	test.Start(_L(" @SYMTestCaseID:SEC-CRYPTOSPI-RANDOM-0001 Starting random number generator tests\r\n"));

	CConsoleBase* originalConsole = test.Console();

	TRAPD(ret,TestsL());

	if (ret)

		{

		test.Printf(_L("Unexpected leave\r\n"));

		// Print something to let the build system know we failed

		test.Printf(_L("\n1 tests failed out of 11\r\n"));

		}	

	test.End();

	if (test.Console() != originalConsole)

		{

		delete test.Console();

		test.SetConsole(originalConsole);

		}	

	test.Close();

	__UHEAP_MARKEND;

	delete cleanup;

	return(KErrNone);

	}