--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcryptospi/inc/des.h Thu Sep 10 14:01:51 2009 +0300
@@ -0,0 +1,178 @@
+/*
+* 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:
+* ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the
+* Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.
+* DES encryptor and decryptor implementation
+*
+*/
+
+
+/**
+ @file
+ @publishedPartner
+ @released
+*/
+
+#ifndef __DATAENCRYPTIONSTANDARD_H__
+#define __DATAENCRYPTIONSTANDARD_H__
+
+#include <blocktransformation.h>
+#ifndef SYMBIAN_ENABLE_SPLIT_HEADERS
+#include <securityerr.h>
+#endif
+
+/** The size of the key schedule array (in 32-bit words).
+*
+*/
+const TUint KDESScheduleSizeInWords = 32;
+
+/**
+* Abstract base class for DES, implementing features common between DES encryption and
+* decryption. From CBlockTransformation
+*
+*/
+class CDES : public CBlockTransformation
+{
+public:
+ virtual void Transform(TDes8& aBlock);
+ virtual TInt BlockSize() const;
+ virtual TInt KeySize() const;
+ virtual void Reset();
+ virtual ~CDES();
+
+ /**
+ Indicates whether a supplied key is weak. If the key is one of the weak keys
+ defined by the crypto library (e.g. {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01})
+ ETrue is returned.
+ @param aKey The Key to be checked. The key length must be
+ KDESKeySize = 8 bytes.
+ @return Whether the key is weak (ETrue or EFalse)
+ */
+ IMPORT_C static TBool IsWeakKey(const TDesC8& aKey);
+
+protected:
+ /** @internalAll */
+ CDES();
+ /** @internalAll */
+ void DoTransform(TUint32& l, TUint32& r, const TUint32* aKey);
+ virtual void SetKey(const TDesC8& aKey, TUint32* aKeyBuffer);
+ virtual void ConstructL(const TDesC8& aKey, TBool aCheckWeakKey);
+protected:
+ /**
+ * Key schedule array
+ *
+ * Also used as the first key in triple-DES
+ */
+ TUint32 iK1[KDESScheduleSizeInWords]; // = 32
+ /**
+ * The initial key.
+ *
+ * The key length must be KDESKeySize = 8 bytes.
+ */
+ HBufC8* iKey;
+};
+
+/**
+* Concrete class for DES encryption.
+*
+*/
+class CDESEncryptor : public CDES
+{
+public:
+ /**
+ * Creates an instance of this class.
+ *
+ * @param aKey The key to be used for encryption. The key length must be
+ * KDESKeySize = 8 bytes.
+ * @param aCheckWeakKey Boolean determining whether to check the key against
+ * a set of known weak key values. Defaults to ETrue.
+ * @return A pointer to the new CDESEncryptor object.
+ *
+ * @leave KErrWeakKey If the key is a weak one, the function leaves having
+ * previously cleaned up any previously allocated memory.
+ * @leave KErrKeyNotWeakEnough If the key size is larger than that allowed by the
+ * cipher strength restrictions of the crypto library.
+ * See TCrypto::IsSymmetricWeakEnoughL()
+ */
+ IMPORT_C static CDESEncryptor* NewL(const TDesC8& aKey, TBool aCheckWeakKey = ETrue);
+
+ /**
+ * Creates an instance of this class and leaves it on the cleanup stack.
+ *
+ * @param aKey The key to be used for encryption. The key length must be
+ * KDESKeySize = 8 bytes.
+ * @param aCheckWeakKey Boolean determining whether to check the resultant key against
+ * a set of known weak key values. Defaults to ETrue.
+ * @return A pointer to the new CDESEncryptor object.
+ *
+ * @leave KErrWeakKey If the key is a weak one, the function leaves having
+ * previously cleaned up any previously allocated memory.
+ * @leave KErrKeyNotWeakEnough If the key size is larger than that allowed by the
+ * cipher strength restrictions of the crypto library.
+ * See TCrypto::IsSymmetricWeakEnoughL()
+ */
+ IMPORT_C static CDESEncryptor* NewLC(const TDesC8& aKey, TBool aCheckWeakKey = ETrue);
+protected:
+ /** @internalComponent */
+ CDESEncryptor(void);
+};
+
+/**
+* Concrete class for DES decryption.
+*
+*/
+class CDESDecryptor : public CDES
+{
+public:
+ /**
+ * Creates an instance of this class.
+ *
+ * @param aKey The key to be used for decryption. The key length must be
+ * KDESKeySize = 8 bytes.
+ * @param aCheckWeakKey Boolean determining whether to check the resultant key against
+ * a set of known weak key values. Defaults to ETrue.
+ * @return A pointer to the new CDESDecryptor object.
+ *
+ * @leave KErrWeakKey If the key is a weak one, the function leaves having
+ * previously cleaned up any previously allocated memory.
+ * @leave KErrKeyNotWeakEnough If the key size is larger than that allowed by the
+ * cipher strength restrictions of the crypto library.
+ * See TCrypto::IsSymmetricWeakEnoughL()
+ */
+ IMPORT_C static CDESDecryptor* NewL(const TDesC8& aKey, TBool aCheckWeakKey = ETrue);
+
+ /**
+ * Creates an instance of this class and leaves it on the cleanup stack.
+ *
+ * @param aKey The key to be used for decryption. The key length must be
+ * KDESKeySize = 8 bytes.
+ * @param aCheckWeakKey Boolean determining whether to check the resultant key against
+ * a set of known weak key values. Defaults to ETrue.
+ * @return A pointer to the new CDESDecryptor object.
+ *
+ * @leave KErrWeakKey If the key is a weak one, the function leaves having
+ * previously cleaned up any previously allocated memory.
+ * @leave KErrKeyNotWeakEnough If the key size is larger than that allowed by the
+ * cipher strength restrictions of the crypto library.
+ * See TCrypto::IsSymmetricWeakEnoughL()
+ */
+ IMPORT_C static CDESDecryptor* NewLC(const TDesC8& aKey, TBool aCheckWeakKey = ETrue);
+protected: // From CDES
+ virtual void SetKey(const TDesC8& aKey, TUint32* aKeyBuffer);
+ /** @internalComponent */
+ CDESDecryptor(void);
+};
+
+#endif // __DATAENCRYPTIONSTANDARD_H__