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00006 #ifndef CRYPTOPP_SAFER_H
00007 #define CRYPTOPP_SAFER_H
00008
00009 #include "seckey.h"
00010 #include "secblock.h"
00011
00012 NAMESPACE_BEGIN(CryptoPP)
00013
00014
00015 class SAFER
00016 {
00017 public:
00018 class CRYPTOPP_NO_VTABLE Base : public BlockCipher
00019 {
00020 public:
00021 unsigned int OptimalDataAlignment() const {return 1;}
00022 void UncheckedSetKey(const byte *userkey, unsigned int length, const NameValuePairs ¶ms);
00023
00024 protected:
00025 virtual bool Strengthened() const =0;
00026
00027 SecByteBlock keySchedule;
00028 static const byte exp_tab[256];
00029 static const byte log_tab[256];
00030 };
00031
00032 class CRYPTOPP_NO_VTABLE Enc : public Base
00033 {
00034 public:
00035 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00036 };
00037
00038 class CRYPTOPP_NO_VTABLE Dec : public Base
00039 {
00040 public:
00041 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00042 };
00043 };
00044
00045 template <class BASE, class INFO, bool STR>
00046 class CRYPTOPP_NO_VTABLE SAFER_Impl : public BlockCipherImpl<INFO, BASE>
00047 {
00048 protected:
00049 bool Strengthened() const {return STR;}
00050 };
00051
00052
00053 struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
00054 {
00055 static const char *StaticAlgorithmName() {return "SAFER-K";}
00056 };
00057
00058
00059 class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation
00060 {
00061 public:
00062 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_K_Info, false> > Encryption;
00063 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_K_Info, false> > Decryption;
00064 };
00065
00066
00067 struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
00068 {
00069 static const char *StaticAlgorithmName() {return "SAFER-SK";}
00070 };
00071
00072
00073 class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation
00074 {
00075 public:
00076 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_SK_Info, true> > Encryption;
00077 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_SK_Info, true> > Decryption;
00078 };
00079
00080 typedef SAFER_K::Encryption SAFER_K_Encryption;
00081 typedef SAFER_K::Decryption SAFER_K_Decryption;
00082
00083 typedef SAFER_SK::Encryption SAFER_SK_Encryption;
00084 typedef SAFER_SK::Decryption SAFER_SK_Decryption;
00085
00086 NAMESPACE_END
00087
00088 #endif