• Main Page
  • Namespaces
  • Classes
  • Files
  • File List
  • File Members

rc2.h

Go to the documentation of this file.
00001 #ifndef CRYPTOPP_RC2_H
00002 #define CRYPTOPP_RC2_H
00003 
00004 /** \file
00005 */
00006 
00007 #include "seckey.h"
00008 #include "secblock.h"
00009 #include "algparam.h"
00010 
00011 NAMESPACE_BEGIN(CryptoPP)
00012 
00013 //! _
00014 struct RC2_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 1, 128>
00015 {
00016     CRYPTOPP_CONSTANT(DEFAULT_EFFECTIVE_KEYLENGTH = 1024)
00017     CRYPTOPP_CONSTANT(MAX_EFFECTIVE_KEYLENGTH = 1024)
00018     static const char *StaticAlgorithmName() {return "RC2";}
00019 };
00020 
00021 /// <a href="http://www.weidai.com/scan-mirror/cs.html#RC2">RC2</a>
00022 class RC2 : public RC2_Info, public BlockCipherDocumentation
00023 {
00024     class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<RC2_Info>
00025     {
00026     public:
00027         void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs &params);
00028         unsigned int OptimalDataAlignment() const {return GetAlignmentOf<word16>();}
00029 
00030     protected:
00031         FixedSizeSecBlock<word16, 64> K;  // expanded key table
00032     };
00033 
00034     class CRYPTOPP_NO_VTABLE Enc : public Base
00035     {
00036     public:
00037         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00038     };
00039 
00040     class CRYPTOPP_NO_VTABLE Dec : public Base
00041     {
00042     public:
00043         void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00044     };
00045 
00046 public:
00047     class Encryption : public BlockCipherFinal<ENCRYPTION, Enc>
00048     {
00049     public:
00050         Encryption() {}
00051         Encryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
00052             {SetKey(key, keyLen);}
00053         Encryption(const byte *key, size_t keyLen, int effectiveKeyLen)
00054             {SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
00055     };
00056 
00057     class Decryption : public BlockCipherFinal<DECRYPTION, Dec>
00058     {
00059     public:
00060         Decryption() {}
00061         Decryption(const byte *key, size_t keyLen=DEFAULT_KEYLENGTH)
00062             {SetKey(key, keyLen);}
00063         Decryption(const byte *key, size_t keyLen, int effectiveKeyLen)
00064             {SetKey(key, keyLen, MakeParameters("EffectiveKeyLength", effectiveKeyLen));}
00065     };
00066 };
00067 
00068 typedef RC2::Encryption RC2Encryption;
00069 typedef RC2::Decryption RC2Decryption;
00070 
00071 NAMESPACE_END
00072 
00073 #endif

Generated on Sun Jul 25 2010 14:44:11 for Crypto++ by  doxygen 1.7.1