crypto/weakcrypto/source/pbe/pbeset.cpp
branchRCL_3
changeset 62 a71299154b21
parent 61 641f389e9157
child 63 94225563cd41
--- a/crypto/weakcrypto/source/pbe/pbeset.cpp	Tue Aug 31 17:00:08 2010 +0300
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,261 +0,0 @@
-/*
-* 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 <e32std.h>
-#include <random.h>
-#include <pbedata.h>
-#include "pkcs5kdf.h"
-#include "pbencryptor.h"
-#include "pbe.h"
-#include <securityerr.h>
-#include "pbesymmetricfactory.h"
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewL(const TPBPassword& aPassword)
-	{
-	CPBEncryptSet* self = NewLC(aPassword);
-	CleanupStack::Pop();
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewLC(const TPBPassword& aPassword)
-	{
-	CPBEncryptSet* self = new(ELeave) CPBEncryptSet;
-	CleanupStack::PushL(self);
-	self->ConstructL(aPassword.Password());
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewL(const TPBPassword& aPassword, 
-	const TPBECipher aCipher)
-	{
-	CPBEncryptSet* self = NewLC(aPassword, aCipher);
-	CleanupStack::Pop();
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewLC(const TPBPassword& aPassword, 
-	const TPBECipher aCipher)
-	{
-	CPBEncryptSet* self = new(ELeave) CPBEncryptSet;
-	CleanupStack::PushL(self);
-	self->ConstructL(aPassword.Password(), aCipher);
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewL(const TPBPassword& aPassword,
-	const CPBEncryptParms& aParms)
-	{
-	CPBEncryptSet* self = NewLC(aPassword, aParms);
-	CleanupStack::Pop();
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewLC(const TPBPassword& aPassword, 
-	const CPBEncryptParms& aParms)
-	{
-	CPBEncryptSet* self = new(ELeave) CPBEncryptSet;
-	CleanupStack::PushL(self);
-	self->ConstructL(aPassword.Password(), aParms);
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewL(const CPBEncryptionData& aData, 
-	const TDesC8& aEncryptedKey, const TPBPassword& aPassword)
-	{
-	CPBEncryptSet* self = NewLC(aData, aEncryptedKey, aPassword);
-	CleanupStack::Pop();
-	return self;
-	}
-
-EXPORT_C CPBEncryptSet* CPBEncryptSet::NewLC(const CPBEncryptionData& aData,
-	const TDesC8& aEncryptedKey, const TPBPassword& aPassword)
-	{
-	CPBEncryptSet* self = new(ELeave) CPBEncryptSet;
-	CleanupStack::PushL(self);
-	self->ConstructL(aData, aEncryptedKey, aPassword);
-	return self;
-	}
-
-void CPBEncryptSet::ConstructL(const TDesC8& aPassword)
-	{
-	CPBEncryptElement::ConstructL(aPassword);
-	ConstructMasterKeyL();
-	}
-
-void CPBEncryptSet::ConstructL(const TDesC8& aPassword,
-	const TPBECipher aCipher)
-	{
-	CPBEncryptElement::ConstructL(aPassword, aCipher);
-	ConstructMasterKeyL();
-	}
-
-void CPBEncryptSet::ConstructL(const TDesC8& aPassword, 
-	const CPBEncryptParms& aParms)
-	{
-	CPBEncryptElement::ConstructL(aPassword, aParms);
-	ConstructMasterKeyL();
-	}
-
-void CPBEncryptSet::ConstructMasterKeyL(void)
-	{
-	TBuf8<KAESKeyBytes256> masterKey(KAESKeyBytes256);
-	TRandom::RandomL(masterKey);
-	iEncryptedMasterKey = HBufC8::NewL(KAESKeyBytes256);
-	EncryptMasterKeyL(masterKey);
-	}
-
-void CPBEncryptSet::ConstructL(const CPBEncryptionData& aData,
-	const TDesC8& aEncryptedMasterKey, const TPBPassword& aPassword)
-	{
-	CPBEncryptElement::ConstructL(aData, aPassword);
-	iEncryptedMasterKey = aEncryptedMasterKey.AllocL();
-	}
-
-EXPORT_C void CPBEncryptSet::ChangePasswordL(const TPBPassword& aNewPassword)
-	{
-	//1) Decrypt master key with old encrypt key 
-	TBuf8<KPBEMaxCipherKeyBytes> masterKey;
-	DecryptMasterKeyL(masterKey);
-
-	//2) create new encrypt parms
-
-	TBuf8<KPBEMaxSaltBytes> authSalt(KPBEMaxSaltBytes);
-	TRandom::RandomL(authSalt);
-
-	//3) create a totally new CPBEncryptionData representing the new password
-	CPBEncryptionData* newData = CPBEncryptionData::NewL(
-		aNewPassword.Password(), authSalt, iData->EncryptParms());
-
-	delete iData;
-	iData = newData;
-
-	// regenerate the password using a maximum length salt.
-	CPBEncryptParms& epNonConst =
-		const_cast<CPBEncryptParms&>(iData->EncryptParms());
-	epNonConst.ResizeSaltL(KPBEMaxSaltBytes);
-
-	TPtr8 iEncryptKeyBuf(iEncryptKey->Des());
-	iEncryptKeyBuf.SetLength(PBE::GetKeyBytes(iData->EncryptParms().Cipher()));
-	
-	iData->EncryptParms().DeriveKeyL(aNewPassword.Password(), iEncryptKeyBuf);
-
-	//4) Encrypt master key with new encrypt key
-	EncryptMasterKeyL(masterKey);
-	}
-
-EXPORT_C const TDesC8& CPBEncryptSet::EncryptedMasterKey(void) const
-	{
-	return *iEncryptedMasterKey;
-	}
-
-CPBEncryptor* CPBEncryptSet::NewEncryptLC(void) const
-	{
-	CPBEncryptor* encryptor = NewEncryptL();
-	CleanupStack::PushL(encryptor);
-	return encryptor;
-	}
-
-CPBEncryptor* CPBEncryptSet::NewEncryptL(void) const
-	{
-	TBuf8<KPBEMaxCipherKeyBytes> masterKey;
-	DecryptMasterKeyL(masterKey);
-
-	CPBEncryptor* encryptor = 0;
-	//make sure the masterkey we pass is exactly the right length for the cipher
-	encryptor = CPBEncryptorSet::NewL(iData->EncryptParms().Cipher(),
-		masterKey.Left(PBE::GetKeyBytes(iData->EncryptParms().Cipher())));		
-	return encryptor;
-	}
-
-CPBDecryptor* CPBEncryptSet::NewDecryptLC(void) const
-	{
-	CPBDecryptor* decryptor = NewDecryptL();
-	CleanupStack::PushL(decryptor);
-	return decryptor;
-	}
-
-CPBDecryptor* CPBEncryptSet::NewDecryptL(void) const
-	{
-	TBuf8<KPBEMaxCipherKeyBytes> masterKey;
-	DecryptMasterKeyL(masterKey);
-
-	CPBDecryptor* decryptor = 0;
-	//make sure the masterkey we pass is exactly the right length for the cipher
-	decryptor = CPBDecryptorSet::NewL(iData->EncryptParms().Cipher(),
-		masterKey.Left(PBE::GetKeyBytes(iData->EncryptParms().Cipher())));		
-	return decryptor;
-	}
-
-void CPBEncryptSet::DecryptMasterKeyL(TDes8& aMasterKey) const
-	{
-	CPBDecryptorElement* decryptor = CPBDecryptorElement::NewLC(
-		iData->EncryptParms().Cipher(), *iEncryptKey, iData->EncryptParms().IV());
-	aMasterKey.SetLength(0);
-	decryptor->Process(*iEncryptedMasterKey, aMasterKey);
-	CleanupStack::PopAndDestroy(decryptor);
-	}
-
-void CPBEncryptSet::EncryptMasterKeyL(const TDesC8& aMasterKey)
-	{
-	CPBEncryptorElement* encryptor = CPBEncryptorElement::NewLC(
-		iData->EncryptParms().Cipher(), *iEncryptKey, iData->EncryptParms().IV());
-	TPtr8 encryptedMasterKeyBuf(iEncryptedMasterKey->Des());
-	encryptedMasterKeyBuf.SetLength(0);
-	encryptor->Process(aMasterKey, encryptedMasterKeyBuf);
-	CleanupStack::PopAndDestroy(encryptor);
-	}
-
-CPBEncryptSet::CPBEncryptSet()
-	{
-	}
-
-CPBEncryptSet::~CPBEncryptSet()
-	{
-	delete iEncryptedMasterKey;
-	}
-
-// Warning: This function is only valid BEFORE you call NewEncryptL
-// After creating the cipher, ask it about itself, not me!
-// This is _very_ dodgy as I assume all sorts of things about the encryptor.
-// 1) That it uses SSLv3 or similar style padding
-// 2) That it stores the IV for that stream at the front.
-// This is here for specific application that requires this and aren't able to
-// actually construct the cipher and ask it.  In almost all other cases you
-// should construct the cipher and ask it.
-TInt CPBEncryptSet::MaxCiphertextLength(TInt aPlaintextLength) const
-    {
-	TUint blocksize = PBE::GetBlockBytes(iData->EncryptParms().Cipher());
-	TUint padding = blocksize - aPlaintextLength % blocksize;
-	//totallength = blocksize of iv hidden at beginning + inputLength + padding
-	return blocksize + aPlaintextLength + padding;
-    }
-
-// Warning: This function is only valid BEFORE you call NewDecryptL
-// After creating the cipher, ask it about itself, not me!
-TInt CPBEncryptSet::MaxPlaintextLength(TInt aCiphertextLength) const
-    {
-	/*It's impossible to determine anything about how much padding will be
-	 * removed.  So we'll return a max length that is longer than will ever
-	 * happen by at most a blocksize - 1.
-	 */
-	//In all cases SSLv3 padding has at least one byte of padding.
-	TUint blocksize = PBE::GetBlockBytes(iData->EncryptParms().Cipher());
-	//totallength = inputlength - iv hidden at beginning - 1 byte of padding
-    return aCiphertextLength - blocksize - 1;
-    }
-