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# safer.h

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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 GetAlignment() const {return 1;}
    00020                 void UncheckedSetKey(CipherDir dir, const byte *userkey, unsigned int length, unsigned nof_rounds);
    00021
    00022                 bool strengthened;
    00023                 SecByteBlock keySchedule;
    00024                 static const byte exp_tab[256];
    00025                 static const byte log_tab[256];
    00026         };
    00027
    00028         class CRYPTOPP_NO_VTABLE Enc : public Base
    00029         {
    00030         public:
    00031                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00032         };
    00033
    00034         class CRYPTOPP_NO_VTABLE Dec : public Base
    00035         {
    00036         public:
    00037                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00038         };
    00039 };
    00040
    00041 //! _
    00042 struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
    00043 {
    00044         static const char *StaticAlgorithmName() {return "SAFER-K";}
    00045         static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 6 : 10;}
    00046 };
    00047
    00048 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a>
    00049 class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation
    00050 {
    00051         class CRYPTOPP_NO_VTABLE Enc : public BlockCipherImpl<SAFER_K_Info, SAFER::Enc>
    00052         {
    00053         public:
    00054                 Enc() {strengthened = false;}
    00055         };
    00056
    00057         class CRYPTOPP_NO_VTABLE Dec : public BlockCipherImpl<SAFER_K_Info, SAFER::Dec>
    00058         {
    00059         public:
    00060                 Dec() {strengthened = false;}
    00061         };
    00062
    00063 public:
    00064         typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    00065         typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
    00066 };
    00067
    00068 //! _
    00069 struct SAFER_SK_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
    00070 {
    00071         static const char *StaticAlgorithmName() {return "SAFER-SK";}
    00072         static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 8 : 10;}
    00073 };
    00074
    00075 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a>
    00076 class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation
    00077 {
    00078         class CRYPTOPP_NO_VTABLE Enc : public BlockCipherImpl<SAFER_SK_Info, SAFER::Enc>
    00079         {
    00080         public:
    00081                 Enc() {strengthened = true;}
    00082         };
    00083
    00084         class CRYPTOPP_NO_VTABLE Dec : public BlockCipherImpl<SAFER_SK_Info, SAFER::Dec>
    00085         {
    00086         public:
    00087                 Dec() {strengthened = true;}
    00088         };
    00089
    00090 public:
    00091         typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
    00092         typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
    00093 };
    00094
    00095 typedef SAFER_K::Encryption SAFER_K_Encryption;
    00096 typedef SAFER_K::Decryption SAFER_K_Decryption;
    00097
    00098 typedef SAFER_SK::Encryption SAFER_SK_Encryption;
    00099 typedef SAFER_SK::Decryption SAFER_SK_Decryption;
    00100
    00101 NAMESPACE_END
    00102
    00103 #endif