Crypto++

- Main Page
- Namespaces
- Classes
- Files

- File List
- File Members

tea.h
Go to the documentation of this file.

    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 &params);
    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 &params);
    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 &params)
    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