Crypto++
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00001 #ifndef CRYPTOPP_TEA_H 00002 #define CRYPTOPP_TEA_H 00003 00004 /** \file 00005 */ 00006 00007 #include "seckey.h" 00008 #include "secblock.h" 00009 00010 NAMESPACE_BEGIN(CryptoPP) 00011 00012 //! _ 00013 struct TEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public VariableRounds<32> 00014 { 00015 static const char *StaticAlgorithmName() {return "TEA";} 00016 }; 00017 00018 /// <a href="http://www.weidai.com/scan-mirror/cs.html#TEA">TEA</a> 00019 class TEA : public TEA_Info, public BlockCipherDocumentation 00020 { 00021 class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<TEA_Info> 00022 { 00023 public: 00024 void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms); 00025 00026 protected: 00027 FixedSizeSecBlock<word32, 4> m_k; 00028 word32 m_limit; 00029 }; 00030 00031 class CRYPTOPP_NO_VTABLE Enc : public Base 00032 { 00033 public: 00034 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00035 }; 00036 00037 class CRYPTOPP_NO_VTABLE Dec : public Base 00038 { 00039 public: 00040 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00041 }; 00042 00043 public: 00044 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; 00045 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; 00046 }; 00047 00048 typedef TEA::Encryption TEAEncryption; 00049 typedef TEA::Decryption TEADecryption; 00050 00051 //! _ 00052 struct XTEA_Info : public FixedBlockSize<8>, public FixedKeyLength<16>, public VariableRounds<32> 00053 { 00054 static const char *StaticAlgorithmName() {return "XTEA";} 00055 }; 00056 00057 /// <a href="http://www.weidai.com/scan-mirror/cs.html#TEA">XTEA</a> 00058 class XTEA : public XTEA_Info, public BlockCipherDocumentation 00059 { 00060 class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<XTEA_Info> 00061 { 00062 public: 00063 void UncheckedSetKey(const byte *userKey, unsigned int length, const NameValuePairs ¶ms); 00064 00065 protected: 00066 FixedSizeSecBlock<word32, 4> m_k; 00067 word32 m_limit; 00068 }; 00069 00070 class CRYPTOPP_NO_VTABLE Enc : public Base 00071 { 00072 public: 00073 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00074 }; 00075 00076 class CRYPTOPP_NO_VTABLE Dec : public Base 00077 { 00078 public: 00079 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00080 }; 00081 00082 public: 00083 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; 00084 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; 00085 }; 00086 00087 //! _ 00088 struct BTEA_Info : public FixedKeyLength<16> 00089 { 00090 static const char *StaticAlgorithmName() {return "BTEA";} 00091 }; 00092 00093 //! <a href="http://www.weidai.com/scan-mirror/cs.html#TEA">corrected Block TEA</a> (as described in "xxtea"). 00094 /*! This class hasn't been tested yet. */ 00095 class BTEA : public BTEA_Info, public BlockCipherDocumentation 00096 { 00097 class CRYPTOPP_NO_VTABLE Base : public AlgorithmImpl<SimpleKeyingInterfaceImpl<BlockCipher, BTEA_Info>, BTEA_Info>, public BTEA_Info 00098 { 00099 public: 00100 void UncheckedSetKey(const byte *key, unsigned int length, const NameValuePairs ¶ms) 00101 { 00102 m_blockSize = params.GetIntValueWithDefault("BlockSize", 60*4); 00103 GetUserKey(BIG_ENDIAN_ORDER, m_k.begin(), 4, key, KEYLENGTH); 00104 } 00105 00106 unsigned int BlockSize() const {return m_blockSize;} 00107 00108 protected: 00109 FixedSizeSecBlock<word32, 4> m_k; 00110 unsigned int m_blockSize; 00111 }; 00112 00113 class CRYPTOPP_NO_VTABLE Enc : public Base 00114 { 00115 public: 00116 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00117 }; 00118 00119 class CRYPTOPP_NO_VTABLE Dec : public Base 00120 { 00121 public: 00122 void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const; 00123 }; 00124 00125 public: 00126 typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption; 00127 typedef BlockCipherFinal<DECRYPTION, Dec> Decryption; 00128 }; 00129 00130 NAMESPACE_END 00131 00132 #endif