00001 #ifndef CRYPTOPP_TWOFISH_H
00002 #define CRYPTOPP_TWOFISH_H
00003
00004
00005
00006
00007 #include "seckey.h"
00008 #include "secblock.h"
00009
00010 NAMESPACE_BEGIN(CryptoPP)
00011
00012 struct Twofish_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 0, 32>, FixedRounds<16>
00013 {
00014 static const char *StaticAlgorithmName() {return "Twofish";}
00015 };
00016
00017
00018 class Twofish : public Twofish_Info, public BlockCipherDocumentation
00019 {
00020 class Base : public BlockCipherBaseTemplate<Twofish_Info>
00021 {
00022 public:
00023 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
00024
00025 protected:
00026 static word32 h0(word32 x, const word32 *key, unsigned int kLen);
00027 static word32 h(word32 x, const word32 *key, unsigned int kLen);
00028
00029 static const byte q[2][256];
00030 static const word32 mds[4][256];
00031
00032 FixedSizeSecBlock<word32, 40> m_k;
00033 FixedSizeSecBlock<word32[256], 4> m_s;
00034 };
00035
00036 class Enc : public Base
00037 {
00038 public:
00039 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00040 };
00041
00042 class Dec : public Base
00043 {
00044 public:
00045 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00046 };
00047
00048 public:
00049 typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
00050 typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
00051 };
00052
00053 typedef Twofish::Encryption TwofishEncryption;
00054 typedef Twofish::Decryption TwofishDecryption;
00055
00056 NAMESPACE_END
00057
00058 #endif