diff -r f18401adf8e1 -r 641f389e9157 crypto/weakcrypto/source/asymmetric/rsaencryptor.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/crypto/weakcrypto/source/asymmetric/rsaencryptor.cpp Tue Aug 31 17:00:08 2010 +0300 @@ -0,0 +1,97 @@ +/* +* Copyright (c) 2003-2009 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: +* +*/ + + +#include +#include +#include +#include +#include +#include +#include +#include "rsafunction.h" + + +EXPORT_C CRSAPKCS1v15Encryptor* CRSAPKCS1v15Encryptor::NewL( + const CRSAPublicKey& aKey) + { + CRSAPKCS1v15Encryptor* self = NewLC(aKey); + CleanupStack::Pop(self); + return self; + } + +EXPORT_C CRSAPKCS1v15Encryptor* CRSAPKCS1v15Encryptor::NewLC( + const CRSAPublicKey& aKey) + { + CRSAPKCS1v15Encryptor* self = new(ELeave) CRSAPKCS1v15Encryptor(aKey); + CleanupStack::PushL(self); + self->ConstructL(); + return self; + } + +TInt CRSAPKCS1v15Encryptor::MaxInputLength(void) const + { + return MaxOutputLength() - iPadding->MinPaddingLength(); + } + +TInt CRSAPKCS1v15Encryptor::MaxOutputLength() const + { + return iPublicKey.N().ByteCount(); + } + +void CRSAPKCS1v15Encryptor::EncryptL(const TDesC8& aInput, TDes8& aOutput)const + { + __ASSERT_DEBUG(aOutput.MaxLength() >= MaxOutputLength(), User::Panic(KCryptoPanic, ECryptoPanicOutputDescriptorOverflow)); + __ASSERT_DEBUG(aInput.Length() <= MaxInputLength(), User::Panic(KCryptoPanic, ECryptoPanicInputTooLarge)); + + HBufC8* buf = HBufC8::NewLC(MaxOutputLength()); + TPtr8 ptr = buf->Des(); + + iPadding->DoPadL(aInput, ptr); + RInteger input = RInteger::NewL(ptr); + CleanupStack::PushL(input); + + RInteger output; + RSAFunction::EncryptL(iPublicKey, input, output); + CleanupStack::PushL(output); + + aOutput.Append(*(output.BufferLC())); + CleanupStack::PopAndDestroy(4, buf); //BufferLC, output, input, buf + } + +CRSAPKCS1v15Encryptor::CRSAPKCS1v15Encryptor(const CRSAPublicKey& aKey) + : iPublicKey(aKey) + { + } + +void CRSAPKCS1v15Encryptor::ConstructL(void) + { + iPadding = CPaddingPKCS1Encryption::NewL(MaxOutputLength()); + + // Check if MaxInputLength() makes sense, if not the key length must + // be too small + if(MaxInputLength() <= 0) + { + User::Leave(KErrKeySize); + } + TCrypto::IsAsymmetricWeakEnoughL(iPublicKey.N().BitCount()); + } + +CRSAPKCS1v15Encryptor::~CRSAPKCS1v15Encryptor(void) + { + delete iPadding; + }