1#ifndef CRYPTOPP_SAFER_H 2#define CRYPTOPP_SAFER_H 3 4/** \file 5*/ 6 7#include "seckey.h" 8#include "secblock.h" 9 10NAMESPACE_BEGIN(CryptoPP) 11 12/// base class, do not use directly 13class SAFER 14{ 15public: 16 class CRYPTOPP_NO_VTABLE Base : public BlockCipher 17 { 18 public: 19 unsigned int OptimalDataAlignment() const {return 1;} 20 void UncheckedSetKey(const byte *userkey, unsigned int length, const NameValuePairs ¶ms); 21 22 protected: 23 virtual bool Strengthened() const =0; 24 25 SecByteBlock keySchedule; 26 static const byte exp_tab[256]; 27 static const byte log_tab[256]; 28 }; 29 30 class CRYPTOPP_NO_VTABLE Enc : public Base 31 { 32 public: 33 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 34 }; 35 36 class CRYPTOPP_NO_VTABLE Dec : public Base 37 { 38 public: 39 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 40 }; 41}; 42 43template <class BASE, class INFO, bool STR> 44class CRYPTOPP_NO_VTABLE SAFER_Impl : public BlockCipherImpl<INFO, BASE> 45{ 46protected: 47 bool Strengthened() const {return STR;} 48}; 49 50//! _ 51struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> 52{ 53 static const char *StaticAlgorithmName() {return "SAFER-K";} 54}; 55 56/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a> 57class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation 58{ 59public: 60 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_K_Info, false> > Encryption; 61 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_K_Info, false> > Decryption; 62}; 63 64//! _ 65struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13> 66{ 67 static const char *StaticAlgorithmName() {return "SAFER-SK";} 68}; 69 70/// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a> 71class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation 72{ 73public: 74 typedef BlockCipherFinal<ENCRYPTION, SAFER_Impl<Enc, SAFER_SK_Info, true> > Encryption; 75 typedef BlockCipherFinal<DECRYPTION, SAFER_Impl<Dec, SAFER_SK_Info, true> > Decryption; 76}; 77 78typedef SAFER_K::Encryption SAFER_K_Encryption; 79typedef SAFER_K::Decryption SAFER_K_Decryption; 80 81typedef SAFER_SK::Encryption SAFER_SK_Encryption; 82typedef SAFER_SK::Decryption SAFER_SK_Decryption; 83 84NAMESPACE_END 85 86#endif 87