--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/source/asymmetric/rsaencryptor.cpp Wed Jul 08 11:25:26 2009 +0100
@@ -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 <asymmetric.h>
+#include <asymmetrickeys.h>
+#include <bigint.h>
+#include <padding.h>
+#include <cryptostrength.h>
+#include <securityerr.h>
+#include <cryptopanic.h>
+#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;
+ }