Main Page | Namespace List | Class Hierarchy | Alphabetical List | Compound List | File List | Namespace Members | Compound Members | File Members

# safer.h

Go to the documentation of this file.

    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 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 Enc : public Base
    00029         {
    00030         public:
    00031                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00032         };
    00033
    00034         class Dec : public Base
    00035         {
    00036         public:
    00037                 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
    00038         };
    00039 };
    00040
    00041 struct SAFER_K_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 8, 16, 8>, public VariableRounds<10, 1, 13>
    00042 {
    00043         static const char *StaticAlgorithmName() {return "SAFER-K";}
    00044         static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 6 : 10;}
    00045 };
    00046
    00047 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-K">SAFER-K</a>
    00048 class SAFER_K : public SAFER_K_Info, public SAFER, public BlockCipherDocumentation
    00049 {
    00050         class Enc : public BlockCipherBaseTemplate<SAFER_K_Info, SAFER::Enc>
    00051         {
    00052         public:
    00053                 Enc() {strengthened = false;}
    00054         };
    00055
    00056         class Dec : public BlockCipherBaseTemplate<SAFER_K_Info, SAFER::Dec>
    00057         {
    00058         public:
    00059                 Dec() {strengthened = false;}
    00060         };
    00061
    00062 public:
    00063         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
    00064         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
    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         static unsigned int DefaultRounds(unsigned int keylength) {return keylength == 8 ? 8 : 10;}
    00071 };
    00072
    00073 /// <a href="http://www.weidai.com/scan-mirror/cs.html#SAFER-SK">SAFER-SK</a>
    00074 class SAFER_SK : public SAFER_SK_Info, public SAFER, public BlockCipherDocumentation
    00075 {
    00076         class Enc : public BlockCipherBaseTemplate<SAFER_SK_Info, SAFER::Enc>
    00077         {
    00078         public:
    00079                 Enc() {strengthened = true;}
    00080         };
    00081
    00082         class Dec : public BlockCipherBaseTemplate<SAFER_SK_Info, SAFER::Dec>
    00083         {
    00084         public:
    00085                 Dec() {strengthened = true;}
    00086         };
    00087
    00088 public:
    00089         typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
    00090         typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
    00091 };
    00092
    00093 typedef SAFER_K::Encryption SAFER_K_Encryption;
    00094 typedef SAFER_K::Decryption SAFER_K_Decryption;
    00095
    00096 typedef SAFER_SK::Encryption SAFER_SK_Encryption;
    00097 typedef SAFER_SK::Decryption SAFER_SK_Decryption;
    00098
    00099 NAMESPACE_END
    00100
    00101 #endif