--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/source/pbe/pbedata.cpp	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,481 @@
+/*
+* Copyright (c) 2002-2009 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 "pkcs5kdf.h"
+#include "pkcs12kdf.h"
+#include "pbedata.h"
+#include "pbesymmetricfactory.h"
+#include "cryptostrength.h"
+
+EXPORT_C CPBEncryptionData* CPBEncryptionData::NewL(const TDesC8& aPassword,
+	TPBECipher aCipher, const TDesC8& aAuthSalt, 
+	const TDesC8& aEncryptSalt, const TDesC8& aIV, TUint aIterations)
+	{
+	CPBEncryptionData* self = NewLC(aPassword, aCipher, aAuthSalt, aEncryptSalt,
+		aIV, aIterations);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBEncryptionData* CPBEncryptionData::NewLC(const TDesC8& aPassword,
+	TPBECipher aCipher, const TDesC8& aAuthSalt, 
+	const TDesC8& aEncryptSalt, const TDesC8& aIV, TUint aIterations)
+	{
+	CPBEncryptionData* self = new(ELeave)CPBEncryptionData();
+	CleanupStack::PushL(self);
+	self->ConstructL(aPassword, aCipher, aAuthSalt, aEncryptSalt, aIV,
+		aIterations);
+	return self;
+	}
+
+EXPORT_C CPBEncryptionData* CPBEncryptionData::NewL(
+	const CPBEncryptionData& aData)
+	{
+	CPBEncryptionData* self = NewLC(aData);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBEncryptionData* CPBEncryptionData::NewLC(
+	const CPBEncryptionData& aData)
+	{
+	CPBEncryptionData* self = new(ELeave)CPBEncryptionData(); 
+	CleanupStack::PushL(self);
+	self->ConstructL(aData);
+	return self;
+	}
+
+EXPORT_C CPBEncryptionData* CPBEncryptionData::NewL(
+	const TDesC8& aPassword, const TDesC8& aAuthSalt,
+	const CPBEncryptParms& aParms)
+/**
+	This factory function takes the user-supplied password
+	and the randomly-generated authentication salt, along
+	with the encryption paramaters.  It is provided so the
+	encryption parameters can be extended without having to
+	provide multiple factory functions.
+
+	@param	aPassword		User-supplied password.  This
+							password is not transformed so
+							if it needs to be in a particular
+							format, e.g. for PKCS#12, the
+							transformation must be applied before
+							this function is called.
+	@param	aAuthSalt		The salt is used to derive the
+							authentication key; not the encryption
+							key.
+	@param	aParms			Encryption parameters describe how the
+							data is encrypted.
+	@return					New instance of CPBEncryptionData.
+ */
+	{
+	CPBEncryptionData* self = new(ELeave) CPBEncryptionData;
+	CleanupStack::PushL(self);
+	self->ConstructL(aPassword, aAuthSalt, aParms);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+void CPBEncryptionData::ConstructL(
+	const TDesC8& aPassword, const TDesC8& aAuthSalt,
+	const CPBEncryptParms& aParms)
+/**
+	Second-phase constructor for factory function with
+	same signature.
+ */
+	{
+	iParms = CPBEncryptParms::NewL(aParms);
+	iAuth = CPBAuthData::NewL(
+		aPassword,
+		aAuthSalt,
+		PBE::GetKeyBytes(aParms.Cipher()),
+		aParms.Iterations());
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+EXPORT_C CPBEncryptionData::CPBEncryptionData(void)
+	{
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+CPBEncryptionData::~CPBEncryptionData(void)
+	{
+	delete iParms;
+	delete iAuth;
+	}
+
+void CPBEncryptionData::ConstructL(const TDesC8& aPassword,
+	TPBECipher aCipher, const TDesC8& aAuthSalt, 
+	const TDesC8& aEncryptSalt, const TDesC8& aIV, TUint aIterations)
+	{
+	iParms = CPBEncryptParms::NewL(aCipher, aEncryptSalt, aIV, aIterations);
+	iAuth = CPBAuthData::NewL(aPassword, aAuthSalt,
+		PBE::GetKeyBytes(aCipher), aIterations);
+	}
+
+void CPBEncryptionData::ConstructL(const CPBEncryptionData& aData)
+	{
+	iParms = CPBEncryptParms::NewL(aData.EncryptParms());
+	iAuth = CPBAuthData::NewL(aData.AuthData());
+	}
+
+EXPORT_C const CPBEncryptParms& CPBEncryptionData::EncryptParms(void) const
+	{
+	return *iParms;
+	} 
+EXPORT_C const CPBAuthData& CPBEncryptionData::AuthData(void) const
+	{
+	return *iAuth;
+	}
+
+/* CPBEncryptParms */
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewL()
+/**
+	This factory function allocates an encryption
+	parameters object with default settings.  The
+	individual settings can be retrieved and modified
+	with the accessor and mutator functions after
+	this object has been created.
+
+	This factory function is provided so that individual
+	parameters can be modified without providing many
+	factory functions.
+
+	@return					New instance of CPBEncryptParms.
+ */
+	{
+	CPBEncryptParms* self = NewLC();
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewLC()
+/**
+	Similar to the NewL overload which takes no
+	arguments, this function additionally puts the
+	allocated instance of CPBEncryptParms on the
+	cleanup stack.
+
+	@return					New instance of CPBEncryptParms.
+ */
+	{
+	CPBEncryptParms* self = new(ELeave) CPBEncryptParms;
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	return self;
+	}
+
+void CPBEncryptParms::ConstructL()
+/**
+	Initialize this object with default cipher, kdf (PKCS#5,)
+	salt length, iteration count, and IV.
+ */
+	{
+	iData = new(ELeave) TParamsData;
+	iData->iKdf = EKdfPkcs5;
+	
+	iSalt = HBufC8::NewMaxL(KPBEDefaultSaltBytes);
+	TPtr8 saltDes = iSalt->Des();
+	TRandom::RandomL(saltDes);
+	
+	iIterations = KDefaultIterations;
+	
+	iIV = HBufC8::NewMaxL(KPBEMaxCipherIVBytes);
+	
+	SetCipher(
+			(TCrypto::Strength() == TCrypto::EStrong)
+		?	KPBEDefaultStrongCipher : KPBEDefaultWeakCipher );
+	}
+
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewL(TPBECipher aCipher,
+	const TDesC8& aSalt, const TDesC8& aIV, TUint aIterations)
+	{
+	CPBEncryptParms* self = NewLC(aCipher, aSalt, aIV, aIterations);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewLC(TPBECipher aCipher,
+	const TDesC8& aSalt, const TDesC8& aIV, TUint aIterations) 
+	{
+	CPBEncryptParms* self = new(ELeave)CPBEncryptParms();
+	CleanupStack::PushL(self);
+	self->ConstructL(aCipher, aSalt, aIV, aIterations);
+	return self;
+	}
+
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewL(const CPBEncryptParms& aParms)
+	{
+	CPBEncryptParms* self = NewLC(aParms);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBEncryptParms* CPBEncryptParms::NewLC(const CPBEncryptParms& aParms)
+	{
+	CPBEncryptParms* self = new(ELeave)CPBEncryptParms();
+	CleanupStack::PushL(self);
+	self->ConstructL(aParms);
+	return self;
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+EXPORT_C CPBEncryptParms::CPBEncryptParms()
+	{
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+CPBEncryptParms::~CPBEncryptParms()
+	{
+	delete iData;
+	delete iSalt;
+	delete iIV;	
+	}
+
+void CPBEncryptParms::ConstructL(TPBECipher aCipher, const TDesC8& aSalt,
+	const TDesC8& aIV, TUint aIterations)
+	{
+	iData = new(ELeave) TParamsData;
+	iData->iCipher = aCipher;
+	iData->iKdf = EKdfPkcs5;
+	iSalt = aSalt.AllocL();
+	iIV = aIV.AllocL();
+	iIterations = aIterations;
+	}
+
+void CPBEncryptParms::ConstructL(const CPBEncryptParms& aParms)
+	{
+	iData = new(ELeave) TParamsData;
+	iData->iCipher = aParms.Cipher();
+	iData->iKdf = aParms.iData->iKdf;
+	iSalt = aParms.Salt().AllocL();
+	iIterations = aParms.Iterations();
+	iIV = aParms.IV().AllocL();
+	}
+
+EXPORT_C TPBECipher CPBEncryptParms::Cipher() const
+	{
+	return iData->iCipher;
+	}
+
+EXPORT_C void CPBEncryptParms::SetCipher(TPBECipher aCipher)
+/**
+ *	Replace the current cipher.  This function resizes the
+ *	IV and replaces its existing contents.
+ *	
+ *	@param aCipher	New cipher.
+ * 
+ * @deprecated		Use SetCipherL instead.
+ * @see				SetCipherL
+ */
+	{
+	TPtr8 ivDes = iIV->Des();
+	ivDes.SetLength(PBE::GetBlockBytes(aCipher));
+	TRandom::RandomL(ivDes);
+	
+	iData->iCipher = aCipher;
+	}
+
+EXPORT_C CPBEncryptParms::TKdf CPBEncryptParms::Kdf() const
+/**
+	Accessor function returns the key derivation function
+	(KDF) specified by this object.
+
+	@return					KDF specified by this object.
+ */
+	{
+	return iData->iKdf;
+	}
+
+EXPORT_C void CPBEncryptParms::SetKdf(CPBEncryptParms::TKdf aKdf)
+/**
+	Replace the current key derivation function.
+
+	@param	aKdf			Key derivation function.
+ */
+	{
+	iData->iKdf = aKdf;
+	}
+
+EXPORT_C TPtrC8 CPBEncryptParms::Salt() const
+	{
+	return TPtrC8(*iSalt);
+	}
+
+EXPORT_C void CPBEncryptParms::ResizeSaltL(TInt aNewLen)
+/**
+	Resize the current salt and replace its contents.
+
+	@param	aNewLen			New salt length.
+ */
+	{
+	iSalt = iSalt->ReAllocL(aNewLen);
+	TPtr8 saltDes = iSalt->Des();
+	TRandom::RandomL(saltDes);
+	}
+
+EXPORT_C TInt CPBEncryptParms::Iterations() const
+	{
+	return iIterations;
+	}
+
+EXPORT_C void CPBEncryptParms::SetIterations(TInt aIterCount)
+/**
+	Replace the current iteration count with the supplied value.
+	
+	@param	aIterCount		Number of iterations to apply in
+							the KDF.
+ */
+	{
+	ASSERT(aIterCount >= 0);
+	iIterations = aIterCount;
+	}
+
+EXPORT_C TPtrC8 CPBEncryptParms::IV() const
+	{
+	return TPtrC8(*iIV);
+	}
+
+EXPORT_C void CPBEncryptParms::SetIV(const TDesC8& aNewIv)
+/**
+	Replace the initialization vector.
+	
+	@param	aNewIv			New initialization vector length.
+							This must have no more than
+							KPBEMaxCipherIVBytes bytes.
+ */
+	{
+	iIV->Des().Copy(aNewIv);
+	}
+
+void CPBEncryptParms::DeriveKeyL(const TDesC8& aPassword, TDes8& aKeyBuf) const
+/**
+	Derive a key from this object's kdf, salt, amd iteration count.
+	
+	@param	aPassword		User-supplied password used to generate key.
+	@param	aKeyBuf			Buffer to populate with new key.
+							On entry it must be set to the required
+							key length.
+ */
+	{
+	switch (iData->iKdf)
+		{
+	case CPBEncryptParms::EKdfPkcs5:
+		TPKCS5KDF::DeriveKeyL(aKeyBuf, aPassword, *iSalt, iIterations);
+		break;
+	
+	case CPBEncryptParms::EKdfPkcs12:
+		PKCS12KDF::DeriveKeyL(aKeyBuf, PKCS12KDF::EIDByteEncryptKey, aPassword, *iSalt, iIterations);
+		break;
+	
+	default:
+		ASSERT(EFalse);
+		break;
+		}
+	}
+
+/* CPBAuthData */
+
+EXPORT_C CPBAuthData* CPBAuthData::NewL(const TDesC8& aPassword,
+	const TDesC8& aSalt, TUint aKeySize, TUint aIterations)
+	{
+	CPBAuthData* self = NewLC(aPassword, aSalt, aKeySize, aIterations);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBAuthData* CPBAuthData::NewLC(const TDesC8& aPassword,
+	const TDesC8& aSalt, TUint aKeySize, TUint aIterations) 
+	{
+	CPBAuthData* self = new(ELeave)CPBAuthData();
+	CleanupStack::PushL(self);
+	self->ConstructL(aPassword, aSalt, aKeySize, aIterations);
+	return self;
+	}
+
+EXPORT_C CPBAuthData* CPBAuthData::NewL(const CPBAuthData& aData)
+	{
+	CPBAuthData* self = NewLC(aData);
+	CleanupStack::Pop(self);
+	return self;
+	}
+
+EXPORT_C CPBAuthData* CPBAuthData::NewLC(const CPBAuthData& aData)
+	{
+	CPBAuthData* self = new(ELeave)CPBAuthData();
+	CleanupStack::PushL(self);
+	self->ConstructL(aData);
+	return self;
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+EXPORT_C CPBAuthData::CPBAuthData()
+	{
+	}
+
+// HPRE-5TDFK2: Remove Store/estor.dll dependency on Cryptography/pbe.dll
+// This method is DUPLICATED in common/generic/syslibs/store/ucrypt/ue_strm.cpp
+CPBAuthData::~CPBAuthData()
+	{
+	delete iAuthKey;
+	delete iSalt;
+	}
+
+void CPBAuthData::ConstructL(const TDesC8& aPassword, const TDesC8& aSalt, 
+	TUint aKeySize, TUint aIterations)
+	{
+	iSalt = aSalt.AllocL();
+	iIterations = aIterations;
+	iAuthKey = HBufC8::NewMaxL(aKeySize);
+	TPtr8 authKeyPtr = iAuthKey->Des();
+	TPKCS5KDF::DeriveKeyL(authKeyPtr, aPassword, *iSalt, iIterations);
+	}
+
+void CPBAuthData::ConstructL(const CPBAuthData& aData)
+	{
+	iAuthKey = aData.Key().AllocL();
+	iSalt = aData.Salt().AllocL();
+	iIterations = aData.Iterations();
+	}
+
+EXPORT_C TPtrC8 CPBAuthData::Key() const
+	{
+	return TPtrC8(*iAuthKey);
+	}
+
+EXPORT_C TPtrC8 CPBAuthData::Salt() const
+	{
+	return TPtrC8(*iSalt);
+	}
+
+EXPORT_C TInt CPBAuthData::Iterations() const
+	{
+	return iIterations;
+	}
+
+EXPORT_C TBool CPBAuthData::operator==(const CPBAuthData& aAuth) const
+	{
+	//if the key's are equal, the its true, as the other members are used in key derivation
+	return (*iAuthKey == aAuth.Key());
+	}