--- 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;
- }
-