sl@0: /*
sl@0: * Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: #include "keystreamutils.h"
sl@0: #include "asymmetrickeys.h"
sl@0: 
sl@0: #ifdef SYMBIAN_KEYSTORE_USE_AUTH_SERVER
sl@0: #include <s32mem.h>
sl@0: #include <pbe.h>
sl@0: #include <pbedata.h>
sl@0: #endif // SYMBIAN_KEYSTORE_USE_AUTH_SERVER
sl@0: 
sl@0: #include <e32debug.h>
sl@0: 
sl@0: void ExternalizeL(const CRSAPublicKey& aKey, RWriteStream& aStream)
sl@0: 	{
sl@0: 	aStream << aKey.N() << aKey.E();
sl@0: 	}
sl@0: 
sl@0: void ExternalizeL(const CRSAPrivateKey& aData, RWriteStream& aStream)
sl@0: 	{
sl@0: 	aStream << aData.N();
sl@0: 	
sl@0: 	// Check the incoming RSA private key (standard or CRT)	
sl@0: 	TRSAPrivateKeyType keyType = aData.PrivateKeyType();
sl@0: 	aStream.WriteInt32L((TInt32)keyType);
sl@0: 
sl@0: 	if (EStandard==keyType)
sl@0: 		{
sl@0: 		const CRSAPrivateKeyStandard& key = static_cast<const CRSAPrivateKeyStandard&>(aData);
sl@0: 		aStream << key.D();
sl@0: 		}
sl@0: 	else if (EStandardCRT==keyType)
sl@0: 		{
sl@0: 		const CRSAPrivateKeyCRT& key = static_cast<const CRSAPrivateKeyCRT&>(aData);
sl@0: 		aStream << key.P() << key.Q() << key.DP() << key.DQ() << key.QInv();
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: void ExternalizeL(const CDSAPublicKey& aKey, RWriteStream& aStream)
sl@0: 	{
sl@0: 	aStream << aKey.P() << aKey.Q() << aKey.G() << aKey.Y();
sl@0: 	}
sl@0: 
sl@0: void ExternalizeL(const CDSAPrivateKey& aKey, RWriteStream& aStream)
sl@0: 	{
sl@0: 	aStream << aKey.P() << aKey.Q() << aKey.G() << aKey.X();
sl@0: 	}
sl@0: 
sl@0: void CreateL(RReadStream& aStream, CRSAPublicKey*& aOut)
sl@0: 	{
sl@0: 	RInteger N, keyPublicExp;
sl@0: 	CreateLC(aStream, N);
sl@0: 	CreateLC(aStream, keyPublicExp);
sl@0: 
sl@0: 	aOut = CRSAPublicKey::NewL(N, keyPublicExp);
sl@0: 
sl@0: 	CleanupStack::Pop(2, &N); // keyPublicExp, N
sl@0: 	}
sl@0: 
sl@0: void CreateL(RReadStream& aStream, CRSAPrivateKey*& aOut)
sl@0: 	{
sl@0: 	RInteger privateN;
sl@0: 	CreateLC(aStream, privateN);
sl@0: 		
sl@0: 	TRSAPrivateKeyType keyType = EStandard;
sl@0: 	keyType = (TRSAPrivateKeyType)aStream.ReadInt32L();
sl@0: 	
sl@0: 	if (EStandard==keyType)
sl@0: 		{
sl@0: 		RInteger D;
sl@0: 		CreateLC(aStream, D);
sl@0: 	
sl@0: 		aOut = CRSAPrivateKeyStandard::NewL(privateN, D);
sl@0: 
sl@0: 		CleanupStack::Pop(&D);
sl@0: 		}
sl@0: 	else if (EStandardCRT==keyType)
sl@0: 		{
sl@0: 		RInteger p, q, dP, dQ, qInv;
sl@0: 		CreateLC(aStream, p);
sl@0: 		CreateLC(aStream, q);
sl@0: 		CreateLC(aStream, dP);
sl@0: 		CreateLC(aStream, dQ);
sl@0: 		CreateLC(aStream, qInv);
sl@0: 				
sl@0: 		aOut = CRSAPrivateKeyCRT::NewL(privateN, p, q, dP, dQ, qInv);
sl@0: 		
sl@0: 		CleanupStack::Pop(5, &p);
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		User::Leave(KErrNotSupported);
sl@0: 		}
sl@0: 
sl@0: 	CleanupStack::Pop(&privateN);
sl@0: 	}
sl@0: 
sl@0: void CreateL(RReadStream& aStream, CDSAPublicKey*& aOut)
sl@0: 	{
sl@0: 	RInteger P, Q, G, Y;
sl@0: 	CreateLC(aStream, P);
sl@0: 	CreateLC(aStream, Q);
sl@0: 	CreateLC(aStream, G);
sl@0: 	CreateLC(aStream, Y);
sl@0: 
sl@0: 	aOut = CDSAPublicKey::NewL(P, Q, G, Y);
sl@0: 
sl@0: 	CleanupStack::Pop(4, &P);
sl@0: 	}
sl@0: 
sl@0: void CreateL(RReadStream& aStream, CDSAPrivateKey*& aOut)
sl@0: 	{
sl@0: 	RInteger P, Q, G, X;
sl@0: 	CreateLC(aStream, P);
sl@0: 	CreateLC(aStream, Q);
sl@0: 	CreateLC(aStream, G);
sl@0: 	CreateLC(aStream, X);
sl@0: 
sl@0: 	aOut = CDSAPrivateKey::NewL(P, Q, G, X);
sl@0: 
sl@0: 	CleanupStack::Pop(4, &P);
sl@0: 	}
sl@0: 
sl@0: #ifdef SYMBIAN_KEYSTORE_USE_AUTH_SERVER
sl@0: 
sl@0: /**
sl@0:  * The input stream contains data in encrypted form. This method 
sl@0:  * supports pbe. In this case the key is the password. It 
sl@0:  * retrieves the plaintext data by decrypting the data using the 
sl@0:  * supplied key.
sl@0:  */
sl@0: 
sl@0: HBufC8* DecryptFromStreamL( RReadStream& aInStream, TPtrC8& aKey )
sl@0: 	{
sl@0: 	
sl@0: 	CPBEncryptionData* data = CPBEncryptionData::NewL(aInStream);
sl@0: 	CleanupStack::PushL(data);
sl@0: 
sl@0: 	TInt32 encKeyLength = aInStream.ReadInt32L();
sl@0: 	HBufC8* encKey = HBufC8::NewMaxLC(encKeyLength);
sl@0: 	TPtr8 encKeyPtr(encKey->Des());
sl@0: 	encKeyPtr.FillZ();
sl@0: 	aInStream.ReadL(encKeyPtr,encKeyLength);
sl@0: 	
sl@0: 	CPBEncryptElement* encryption = CPBEncryptElement::NewLC(*data,aKey);
sl@0: 
sl@0: 	CPBDecryptor* decryptor = encryption->NewDecryptLC();
sl@0: 	HBufC8* plaintext = HBufC8::NewLC(decryptor->MaxOutputLength(encKeyPtr.Length())); 
sl@0: 	TPtr8 plaintextPtr = plaintext->Des();	
sl@0: 	plaintextPtr.FillZ();
sl@0: 	decryptor->ProcessFinalL(encKeyPtr, plaintextPtr);
sl@0: 
sl@0: 	CleanupStack::Pop(plaintext);
sl@0: 	CleanupStack::PopAndDestroy(4,data); // encKey, encryption, decryptor 
sl@0: 	
sl@0: 	return plaintext;
sl@0: 	}
sl@0: 
sl@0: #endif // SYMBIAN_KEYSTORE_USE_AUTH_SERVER
sl@0: