omadrm/drmengine/roap/src/RoapSigner.cpp
author hgs
Thu, 24 Jun 2010 12:39:58 +0300
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permissions -rw-r--r--
201025_01
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/*
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* Copyright (c) 2002 - 2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  ROAP message signer class implementation
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*
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*/
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// INCLUDE FILES
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#include <e32std.h>
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#include <f32file.h>
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#include <s32file.h>
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#include <hash.h>
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#include <signed.h>
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#include <asymmetric.h>
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#include <hash.h>
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#include <asn1enc.h>
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#include <x509cert.h>
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#include "Base64.h"
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#include "RoapSigner.h"
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#include "RoapStorageClient.h"
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#include "RoapLog.h"
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using namespace Roap;
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// CONSTANTS
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_LIT8( KSignatureStart, "<signature>" );
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_LIT8( KSignatureEnd, "</signature>" );
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_LIT8( KRoEndWithPrefix, "</roap:protectedRO>" );
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_LIT8( KRoEnd, "</protectedRO>" );
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// ============================ MEMBER FUNCTIONS ===============================
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// -----------------------------------------------------------------------------
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// RoapSigner::RoapSigner
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// -----------------------------------------------------------------------------
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//
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CRoapSigner::CRoapSigner():
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    iHash( NULL ),
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    iStorage( NULL )
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    {
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    }
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// -----------------------------------------------------------------------------
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// CRIHello::ConstructL
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// Symbian 2nd phase constructor can leave.
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// -----------------------------------------------------------------------------
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//
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void CRoapSigner::ConstructL( RRoapStorageClient& aStorageClient )
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    {
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    iHash = CSHA1::NewL();
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    iStorage = &aStorageClient;
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    }
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// Destructor
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CRoapSigner::~CRoapSigner()
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    {
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    iRequests.ResetAndDestroy();
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    iResponses.ResetAndDestroy();
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    delete iHash;
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    }
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// -----------------------------------------------------------------------------
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// RoapSigner::
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//
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// -----------------------------------------------------------------------------
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//
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CRoapSigner* CRoapSigner::NewL( RRoapStorageClient& aStorageClient )
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    {
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    CRoapSigner* self = new ( ELeave ) CRoapSigner();
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    CleanupStack::PushL( self );
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    self->ConstructL( aStorageClient );
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    CleanupStack::Pop( self );
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    return self;
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    }
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// -----------------------------------------------------------------------------
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// CRoapSigner::ResetRequests
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// -----------------------------------------------------------------------------
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//
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void CRoapSigner::ResetRequests( void )
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    {
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    iRequests.ResetAndDestroy();
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    }
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// -----------------------------------------------------------------------------
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// CRoapSigner::ResetResponses
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// -----------------------------------------------------------------------------
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//
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void CRoapSigner::ResetResponses( void )
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    {
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    iResponses.ResetAndDestroy();
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    }
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// -----------------------------------------------------------------------------
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// CRoapSigner::AddResponseL
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// -----------------------------------------------------------------------------
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//
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void CRoapSigner::AddResponseL(
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    const TDesC8& aResponse )
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    {
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    HBufC8* b = aResponse.AllocLC();
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    iResponses.AppendL( b );
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    CleanupStack::Pop( b );
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    }
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   123
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   124
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// -----------------------------------------------------------------------------
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// CRoapSigner::VerifyAndAddResponseL
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// -----------------------------------------------------------------------------
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//
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TBool CRoapSigner::VerifyAndAddResponseL(
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    const TDesC8& aResponse,
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    const TDesC8& aSignature,
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    const RPointerArray<HBufC8>& aCertificateChain )
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    {
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    TBool r = ETrue;
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    TInt i( 0 );
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    TInt startPoint = 0;
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    TInt endPoint = 0;
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    TInt roEnd = 0;
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   139
    TPtr8 ptr( 0, 0 );
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    TPtrC8 hash( 0, 0 );
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    HBufC8* tempMessage = NULL;
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    TInt lastRoEnd( 0 );
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   143
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    LOGLIT( "CRoapSigner::VerifyAndAddResponseL" );
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   145
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    // locate the last protectedRO endtag - there could be also <signature> elemet
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    // inside the ro element
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    while ( lastRoEnd >= 0 )
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        {
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        TInt tagIncrement( KRoEndWithPrefix().Length() );
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        roEnd += lastRoEnd;
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        TPtrC8 startPtr( aResponse.Mid( roEnd ) );
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        lastRoEnd = startPtr.Find( KRoEndWithPrefix );
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        if ( lastRoEnd == KErrNotFound )
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            {
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            // try again without namespace prefix
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            lastRoEnd = startPtr.Find( KRoEnd );
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            tagIncrement = KRoEnd().Length();
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            }
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        if ( lastRoEnd > 0 )
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            {
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            lastRoEnd += tagIncrement;
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            }
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        DETAILLOG2( _L( "lastRoEnd %08x:" ), lastRoEnd );
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        }
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    DETAILLOG2( _L( "roEnd %08x:" ), roEnd );
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    if ( roEnd > 0 )
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        {
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        startPoint = aResponse.Right( aResponse.Length() - roEnd ).Find( KSignatureStart );
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        startPoint += roEnd;
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        endPoint = aResponse.Right( aResponse.Length() - roEnd ).Find( KSignatureEnd )
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                                   + KSignatureEnd().Length();
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        endPoint += roEnd;
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   174
        }
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    else
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        {
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        startPoint = aResponse.Find( KSignatureStart );
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        endPoint = aResponse.Find( KSignatureEnd ) + KSignatureEnd().Length();
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        }
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   180
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    tempMessage = HBufC8::NewMax( aResponse.Length() -
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                                 2 * KSignatureStart().Length() );
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   183
    User::LeaveIfNull( tempMessage );
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   184
    ptr.Set( tempMessage->Des() );
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    ptr.Copy( aResponse.Left( startPoint ) );
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    ptr.Append( aResponse.Right( aResponse.Length() - endPoint ) );
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   187
49
69d8e75812b7 201025_01
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    CleanupStack::PushL( tempMessage );
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    iResponses.AppendL ( tempMessage );
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    CleanupStack::Pop( tempMessage );
0
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   191
    iHash->Reset();
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   192
    for ( i = 0; i < iResponses.Count(); i++ )
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   193
        {
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   194
        DETAILLOG2( _L( "Message %d:" ), i );
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   195
        DETAILLOGHEX( iResponses[ i ]->Ptr(), iResponses[ i ]->Length() );
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   196
        iHash->Update( *iResponses[ i ] );
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   197
        }
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   198
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   199
    hash.Set( iHash->Final() );
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   200
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    LOGLIT( "Hash" );
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    LOGHEX( hash.Ptr(), hash.Length() );
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   203
    LOGLIT( "Signature" );
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   204
    LOGHEX( aSignature.Ptr(), aSignature.Length() );
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   205
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    r= iStorage->VerifyL( aSignature, hash, aCertificateChain );
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   207
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#ifdef _ROAP_TESTING
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    if ( r )
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        {
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        LOGLIT( "Signature verification ok." );
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   212
        }
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   213
    else
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        {
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        LOGLIT( "Signature verification failed." );
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   216
        }
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#endif
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   218
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    return r;
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   220
    }
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   221
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   222
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// -----------------------------------------------------------------------------
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// CRoapSigner::AddRequestL
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// -----------------------------------------------------------------------------
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//
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void CRoapSigner::AddRequestL(
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    const TDesC8& aRequest )
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   229
    {
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   230
    HBufC8* b = aRequest.AllocLC();
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   231
    iRequests.AppendL( b );
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   232
    CleanupStack::Pop( b );
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   233
    }
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// -----------------------------------------------------------------------------
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// CRoapSigner::SignAndAddRequestL
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// -----------------------------------------------------------------------------
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//
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HBufC8* CRoapSigner::SignAndAddRequestL(
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    const TDesC8& aRequest )
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    {
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    TInt i;
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    TInt insertPoint;
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    HBufC8* s;
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    HBufC8* r;
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    TPtr8 ptr( 0, 0 );
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    HBufC8* signature = NULL;
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    HBufC8* tempMessage = NULL;
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    TPtrC8 hash( 0, 0 );
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    LOGLIT( "CRoapSigner::SignAndAddRequestL" );
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    insertPoint = aRequest.Find( KSignatureStart ) + KSignatureStart().Length();
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    tempMessage = HBufC8::NewMax( aRequest.Length() -
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        2 * KSignatureStart().Length() );
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    User::LeaveIfNull( tempMessage );
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    ptr.Set( tempMessage->Des() );
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    ptr.Copy( aRequest.Left( insertPoint - KSignatureStart().Length() ) );
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    ptr.Append( aRequest.Right( aRequest.Length() - insertPoint -
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        KSignatureStart().Length() - 1 ) );
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    iHash->Reset();
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    for ( i = 0; i < iRequests.Count(); i++ )
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        {
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        DETAILLOG2( _L( "Message %d:" ), i );
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        DETAILLOGHEX( iRequests[ i ]->Ptr(), iRequests[ i ]->Length() );
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        iHash->Update( *iRequests[ i ] );
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        }
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    DETAILLOG2( _L( "Message %d:" ), i );
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    DETAILLOGHEX( tempMessage->Ptr(), tempMessage->Length() );
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    iHash->Update( *tempMessage );
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    delete tempMessage;
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    hash.Set( iHash->Final() );
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    LOGLIT( "Hash" );
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    LOGHEX( hash.Ptr(), hash.Length() );
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    iStorage->SignL( hash, signature );
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    CleanupStack::PushL( signature );
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    LOGLIT( "Signature" );
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    LOGHEX( signature->Ptr(), signature->Length() );
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    s = Base64EncodeL( *signature );
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    CleanupStack::PushL( s );
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    r = HBufC8::NewMax( s->Length() + aRequest.Length() );
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    User::LeaveIfNull( r );
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    ptr.Set( r->Des() );
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    ptr.Copy( aRequest.Left( insertPoint ) );
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    ptr.Append( *s );
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    ptr.Append( aRequest.Right( aRequest.Length() - insertPoint ) );
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    CleanupStack::PopAndDestroy( s );
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    CleanupStack::PopAndDestroy( signature );
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    CleanupStack::PushL( r );
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    iRequests.AppendL ( r->Des().AllocL() );
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    CleanupStack::Pop( r );
0
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    return r;
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    }
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//  End of File