--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/obex/obexprotocol/obex/src/authentication.cpp	Tue Oct 19 11:00:12 2010 +0800
@@ -0,0 +1,97 @@
+// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "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:
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#include <hash.h>
+#include <e32math.h>
+#include <obex.h>
+#include "authentication.h"
+
+_LIT8(KColonCharacter, ":");
+
+CObexAuthenticator* CObexAuthenticator::NewL()
+	{
+	CObexAuthenticator* s = new(ELeave) CObexAuthenticator;
+	CleanupStack::PushL(s);
+	s->ConstructL();
+	CleanupStack::Pop();
+	return s;
+	}
+
+void CObexAuthenticator::ConstructL()
+	{
+	iMD5 = CMD5::NewL();
+	}
+
+CObexAuthenticator::CObexAuthenticator()
+	{
+	TTime time;
+	time.UniversalTime();
+	iSeed = time.Int64();
+	}
+
+CObexAuthenticator::~CObexAuthenticator()
+	{
+	delete iMD5;
+	}
+
+TInt CObexAuthenticator::GenerateNonce(TDes8& aNonce)
+	{
+	TTime time;
+	time.UniversalTime();
+
+	TInt64 randomNumber = Math::Rand(iSeed);
+	randomNumber <<= 32;
+	randomNumber += Math::Rand(iSeed);
+
+	TBuf8<33> key;
+	key.Zero();
+	key.AppendNum(time.Int64(), EHex);
+	key.Append(_L8(":"));
+	key.AppendNum(randomNumber, EHex);
+	
+	iMD5->Reset();
+	aNonce.Append(iMD5->Hash(key));
+	return KErrNone;
+	}
+
+void CObexAuthenticator::GenerateResponseL(const TDesC8& aPasswd, const TNonce& aNonce, TRequestDigest& aRequestDigest)
+	{
+	//work out the length of buffer we need
+	TInt buflen = aNonce.Length() + KColonCharacter().Length() + aPasswd.Length();
+	HBufC8* buf = HBufC8::NewLC(buflen);
+	TPtr8 ptr = buf->Des();
+	ptr.Zero();
+	ptr.Append(aNonce);
+	ptr.Append(KColonCharacter);
+	ptr.Append(aPasswd);
+	iMD5->Reset();
+	aRequestDigest.Append(iMD5->Hash(*buf));
+
+	CleanupStack::PopAndDestroy();//buf
+	}
+
+void CObexAuthenticator::ChallengeResponseL(const TDesC8& aPasswd, const TNonce& aNonce, const TRequestDigest& aRequestDigest)
+	{
+	TRequestDigest digest;
+	digest.Zero();
+	GenerateResponseL(aPasswd, aNonce, digest);
+	if (digest != aRequestDigest)
+		User::Leave(KErrAccessDenied);
+	}