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/*
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* Copyright (c) 2003-2009 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 the License "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:
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*
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*/
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#include <asymmetric.h>
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#include <asymmetrickeys.h>
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#include <bigint.h>
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#include <securityerr.h>
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#include "rsafunction.h"
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/* CRSAVerifier */
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EXPORT_C CRSAVerifier::CRSAVerifier(void)
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{
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}
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EXPORT_C TBool CRSAVerifier::VerifyL(const TDesC8& aInput,
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const CRSASignature& aSignature) const
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{
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TBool retval = EFalse;
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HBufC8* inverseSign = InverseSignLC(aSignature);
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if (inverseSign->Compare(aInput)==0)
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{
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retval = ETrue;
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}
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CleanupStack::PopAndDestroy(inverseSign);
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return retval;
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}
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/* CRSAPKCS1v15Verifier */
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EXPORT_C CRSAPKCS1v15Verifier* CRSAPKCS1v15Verifier::NewL(
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const CRSAPublicKey& aKey)
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{
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CRSAPKCS1v15Verifier* self = NewLC(aKey);
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CleanupStack::Pop();
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return self;
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}
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EXPORT_C CRSAPKCS1v15Verifier* CRSAPKCS1v15Verifier::NewLC(
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const CRSAPublicKey& aKey)
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{
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CRSAPKCS1v15Verifier* self = new(ELeave) CRSAPKCS1v15Verifier(aKey);
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CleanupStack::PushL(self);
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self->ConstructL();
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return self;
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}
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TInt CRSAPKCS1v15Verifier::MaxInputLength(void) const
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{
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return MaxOutputLength() - iPadding->MinPaddingLength();
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}
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TInt CRSAPKCS1v15Verifier::MaxOutputLength(void) const
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{
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return iPublicKey.N().ByteCount();
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}
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HBufC8* CRSAPKCS1v15Verifier::InverseSignLC(
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const CRSASignature& aSignature) const
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{
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HBufC8* unpaddedBuf = HBufC8::NewMaxLC(MaxOutputLength());
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TPtr8 unpaddedHash = unpaddedBuf->Des();
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RInteger input = RInteger::NewL(aSignature.S());
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CleanupStack::PushL(input);
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RInteger output;
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RSAFunction::VerifyL(iPublicKey, input, output);
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CleanupStack::PushL(output);
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TPtrC8 paddedHashPtr = *(output.BufferLC());
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iPadding->UnPadL(paddedHashPtr, unpaddedHash);
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CleanupStack::PopAndDestroy(3, &input); //BufferLC, output, input
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return unpaddedBuf;
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}
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CRSAPKCS1v15Verifier::CRSAPKCS1v15Verifier(const CRSAPublicKey& aKey)
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: iPublicKey(aKey)
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{
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}
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void CRSAPKCS1v15Verifier::ConstructL(void)
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{
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iPadding = CPaddingPKCS1Signature::NewL(MaxOutputLength());
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// Check if MaxInputLength() makes sense, if not the key length must
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// be too small
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if(MaxInputLength() <= 0)
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{
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User::Leave(KErrKeySize);
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}
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}
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CRSAPKCS1v15Verifier::~CRSAPKCS1v15Verifier(void)
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{
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delete iPadding;
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}
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