00001 #ifndef CRYPTOPP_TEA_H
00002 #define CRYPTOPP_TEA_H
00003
00004
00005
00006
00007 #include "seckey.h"
00008 #include "secblock.h"
00009
00010 NAMESPACE_BEGIN(CryptoPP)
00011
00012 struct TEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public FixedRounds<32>
00013 {
00014 enum {LOG_ROUNDS=5};
00015 static const char *StaticAlgorithmName() {return "TEA";}
00016 };
00017
00018
00019 class TEA : public TEA_Info, public BlockCipherDocumentation
00020 {
00021 class Base : public BlockCipherBaseTemplate<TEA_Info>
00022 {
00023 public:
00024 void UncheckedSetKey(CipherDir direction, const byte *userKey, unsigned int length);
00025
00026 protected:
00027 static const word32 DELTA;
00028 FixedSizeSecBlock<word32, 4> k;
00029 };
00030
00031 class Enc : public Base
00032 {
00033 public:
00034 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00035 };
00036
00037 class Dec : public Base
00038 {
00039 public:
00040 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
00041 };
00042
00043 public:
00044 typedef BlockCipherTemplate<ENCRYPTION, Enc> Encryption;
00045 typedef BlockCipherTemplate<DECRYPTION, Dec> Decryption;
00046 };
00047
00048 typedef TEA::Encryption TEAEncryption;
00049 typedef TEA::Decryption TEADecryption;
00050
00051 NAMESPACE_END
00052
00053 #endif