Go to the documentation of this file.00001 #ifndef CRYPTOPP_CAST_H
00002 #define CRYPTOPP_CAST_H
00003
00004
00005
00006
00007 #include "seckey.h"
00008 #include "secblock.h"
00009
00010 NAMESPACE_BEGIN(CryptoPP)
00011
00012 class CAST
00013 {
00014 protected:
00015 static const word32 S[8][256];
00016 };
00017
00018
00019 struct CAST128_Info : public FixedBlockSize<8>, public VariableKeyLength<16, 5, 16>
00020 {
00021 static const char *StaticAlgorithmName() {return "CAST-128";}
00022 };
00023
00024
00025 class CAST128 : public CAST128_Info, public BlockCipherDocumentation
00026 {
00027 class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST128_Info>
00028 {
00029 public:
00030 void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
00031
00032 protected:
00033 bool reduced;
00034 FixedSizeSecBlock<word32, 32> K;
00035 };
00036
00037 class CRYPTOPP_NO_VTABLE Enc : public Base
00038 {
00039 public:
00040 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00041 };
00042
00043 class CRYPTOPP_NO_VTABLE Dec : public Base
00044 {
00045 public:
00046 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00047 };
00048
00049 public:
00050 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
00051 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
00052 };
00053
00054
00055 struct CAST256_Info : public FixedBlockSize<16>, public VariableKeyLength<16, 16, 32>
00056 {
00057 static const char *StaticAlgorithmName() {return "CAST-256";}
00058 };
00059
00060
00061 class CAST256 : public CAST256_Info, public BlockCipherDocumentation
00062 {
00063 class CRYPTOPP_NO_VTABLE Base : public CAST, public BlockCipherImpl<CAST256_Info>
00064 {
00065 public:
00066 void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms);
00067 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00068
00069 protected:
00070 static const word32 t_m[8][24];
00071 static const unsigned int t_r[8][24];
00072
00073 static void Omega(int i, word32 kappa[8]);
00074
00075 FixedSizeSecBlock<word32, 8*12> K;
00076 };
00077
00078 public:
00079 typedef BlockCipherFinal<ENCRYPTION, Base> Encryption;
00080 typedef BlockCipherFinal<DECRYPTION, Base> Decryption;
00081 };
00082
00083 typedef CAST128::Encryption CAST128Encryption;
00084 typedef CAST128::Decryption CAST128Decryption;
00085
00086 typedef CAST256::Encryption CAST256Encryption;
00087 typedef CAST256::Decryption CAST256Decryption;
00088
00089 NAMESPACE_END
00090
00091 #endif