1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 /**

    17  @file

    18  @internalComponent

    19 */

    20 

    21 #include <hash.h>

    22 #include <e32math.h>

    23 #include <obex.h>

    24 #include "authentication.h"

    25 

    26 _LIT8(KColonCharacter, ":");

    27 

    28 CObexAuthenticator* CObexAuthenticator::NewL()

    29 	{

    30 	CObexAuthenticator* s = new(ELeave) CObexAuthenticator;

    31 	CleanupStack::PushL(s);

    32 	s->ConstructL();

    33 	CleanupStack::Pop();

    34 	return s;

    35 	}

    36 

    37 void CObexAuthenticator::ConstructL()

    38 	{

    39 	iMD5 = CMD5::NewL();

    40 	}

    41 

    42 CObexAuthenticator::CObexAuthenticator()

    43 	{

    44 	TTime time;

    45 	time.UniversalTime();

    46 	iSeed = time.Int64();

    47 	}

    48 

    49 CObexAuthenticator::~CObexAuthenticator()

    50 	{

    51 	delete iMD5;

    52 	}

    53 

    54 TInt CObexAuthenticator::GenerateNonce(TDes8& aNonce)

    55 	{

    56 	TTime time;

    57 	time.UniversalTime();

    58 

    59 	TInt64 randomNumber = Math::Rand(iSeed);

    60 	randomNumber <<= 32;

    61 	randomNumber += Math::Rand(iSeed);

    62 

    63 	TBuf8<33> key;

    64 	key.Zero();

    65 	key.AppendNum(time.Int64(), EHex);

    66 	key.Append(_L8(":"));

    67 	key.AppendNum(randomNumber, EHex);

    68 	

    69 	iMD5->Reset();

    70 	aNonce.Append(iMD5->Hash(key));

    71 	return KErrNone;

    72 	}

    73 

    74 void CObexAuthenticator::GenerateResponseL(const TDesC8& aPasswd, const TNonce& aNonce, TRequestDigest& aRequestDigest)

    75 	{

    76 	//work out the length of buffer we need

    77 	TInt buflen = aNonce.Length() + KColonCharacter().Length() + aPasswd.Length();

    78 	HBufC8* buf = HBufC8::NewLC(buflen);

    79 	TPtr8 ptr = buf->Des();

    80 	ptr.Zero();

    81 	ptr.Append(aNonce);

    82 	ptr.Append(KColonCharacter);

    83 	ptr.Append(aPasswd);

    84 	iMD5->Reset();

    85 	aRequestDigest.Append(iMD5->Hash(*buf));

    86 

    87 	CleanupStack::PopAndDestroy();//buf

    88 	}

    89 

    90 void CObexAuthenticator::ChallengeResponseL(const TDesC8& aPasswd, const TNonce& aNonce, const TRequestDigest& aRequestDigest)

    91 	{

    92 	TRequestDigest digest;

    93 	digest.Zero();

    94 	GenerateResponseL(aPasswd, aNonce, digest);

    95 	if (digest != aRequestDigest)

    96 		User::Leave(KErrAccessDenied);

    97 	}