00001 #ifndef CRYPTOPP_SAFER_H
00002 #define CRYPTOPP_SAFER_H
00003
00004
00005
00006
00007 #include "seckey.h"
00008 #include "secblock.h"
00009
00010 NAMESPACE_BEGIN(CryptoPP)
00011
00012
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
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
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