Crypto++
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00001 #ifndef CRYPTOPP_SAFER_H 00002 #define CRYPTOPP_SAFER_H 00003 00004 /** \file 00005 */ 00006 00007 #include "seckey.h" 00008 #include "secblock.h" 00009 00010 NAMESPACE_BEGIN(CryptoPP) 00011 00012 /// base class, do not use directly 00013 class SAFER 00014 { 00015 public: 00016 class CRYPTOPP_NO_VTABLE Base : public BlockCipher 00017 { 00018 public: 00019 unsigned int OptimalDataAlignment() const {return 1;} 00020 void UncheckedSetKey(const byte *userkey, unsigned int length, const NameValuePairs ¶ms); 00021 00022 protected: 00023 virtual bool Strengthened() const =0; 00024 00025 SecByteBlock keySchedule; 00026 static const byte exp_tab[256]; 00027 static const byte log_tab[256]; 00028 }; 00029 00030 class CRYPTOPP_NO_VTABLE Enc : public Base 00031 { 00032 public: 00033 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00034 }; 00035 00036 class CRYPTOPP_NO_VTABLE Dec : public Base 00037 { 00038 public: 00039 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00040 }; 00041 }; 00042 00043 template <class BASE, class INFO, bool STR> 00044 class CRYPTOPP_NO_VTABLE SAFER_Impl : public BlockCipherImpl<INFO, BASE> 00045 { 00046 protected: 00047 bool Strengthened() const {return STR;} 00048 }; 00049 00050 //! _ 00051 struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> 00052 { 00053 static const char *StaticAlgorithmName() {return "SAFER-K";} 00054 }; 00055 00056 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a> 00057 class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation 00058 { 00059 public: 00060 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_K_Info, false> > Encryption; 00061 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_K_Info, false> > Decryption; 00062 }; 00063 00064 //! _ 00065 struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> 00066 { 00067 static const char *StaticAlgorithmName() {return "SAFER-SK";} 00068 }; 00069 00070 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a> 00071 class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation 00072 { 00073 public: 00074 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_SK_Info, true> > Encryption; 00075 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_SK_Info, true> > Decryption; 00076 }; 00077 00078 typedef SAFER_K::Encryption SAFER_K_Encryption; 00079 typedef SAFER_K::Decryption SAFER_K_Decryption; 00080 00081 typedef SAFER_SK::Encryption SAFER_SK_Encryption; 00082 typedef SAFER_SK::Decryption SAFER_SK_Decryption; 00083 00084 NAMESPACE_END 00085 00086 #endif