00001 #ifndef CRYPTOPP_ARC4_H
00002 #define CRYPTOPP_ARC4_H
00003
00004 #include "strciphr.h"
00005
00006 NAMESPACE_BEGIN(CryptoPP)
00007
00008 namespace Weak1 {
00009
00010
00011 class CRYPTOPP_NO_VTABLE ARC4_Base : public VariableKeyLength<16, 1, 256>, public RandomNumberGenerator, public SymmetricCipher, public SymmetricCipherDocumentation
00012 {
00013 public:
00014 ~ARC4_Base();
00015
00016 static const char *StaticAlgorithmName() {return "ARC4";}
00017
00018 void GenerateBlock(byte *output, size_t size);
00019 void DiscardBytes(size_t n);
00020
00021 void ProcessData(byte *outString, const byte *inString, size_t length);
00022
00023 bool IsRandomAccess() const {return false;}
00024 bool IsSelfInverting() const {return true;}
00025 bool IsForwardTransformation() const {return true;}
00026
00027 typedef SymmetricCipherFinal<ARC4_Base> Encryption;
00028 typedef SymmetricCipherFinal<ARC4_Base> Decryption;
00029
00030 protected:
00031 void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms);
00032 virtual unsigned int GetDefaultDiscardBytes() const {return 0;}
00033
00034 FixedSizeSecBlock<byte, 256> m_state;
00035 byte m_x, m_y;
00036 };
00037
00038
00039 DOCUMENTED_TYPEDEF(SymmetricCipherFinal<ARC4_Base>, ARC4)
00040
00041
00042 class CRYPTOPP_NO_VTABLE MARC4_Base : public ARC4_Base
00043 {
00044 public:
00045 static const char *StaticAlgorithmName() {return "MARC4";}
00046
00047 typedef SymmetricCipherFinal<MARC4_Base> Encryption;
00048 typedef SymmetricCipherFinal<MARC4_Base> Decryption;
00049
00050 protected:
00051 unsigned int GetDefaultDiscardBytes() const {return 256;}
00052 };
00053
00054
00055 DOCUMENTED_TYPEDEF(SymmetricCipherFinal<MARC4_Base>, MARC4)
00056
00057 }
00058 #if CRYPTOPP_ENABLE_NAMESPACE_WEAK >= 1
00059 namespace Weak {using namespace Weak1;}
00060 #else
00061 using namespace Weak1;
00062 #ifdef __GNUC__
00063 #warning "You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning."
00064 #else
00065 #pragma message("You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning.")
00066 #endif
00067 #endif
00068
00069 NAMESPACE_END
00070
00071 #endif