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panama.h

00001 #ifndef CRYPTOPP_PANAMA_H 00002 #define CRYPTOPP_PANAMA_H 00003 00004 #include "seckey.h" 00005 #include "secblock.h" 00006 #include "iterhash.h" 00007 #include "strciphr.h" 00008 00009 NAMESPACE_BEGIN(CryptoPP) 00010 00011 /// base class, do not use directly 00012 template <class B> 00013 class Panama 00014 { 00015 public: 00016 void Reset(); 00017 void Iterate(unsigned int count, const word32 *p=NULL, word32 *z=NULL, const word32 *y=NULL); 00018 00019 protected: 00020 typedef word32 Stage[8]; 00021 enum {STAGES = 32}; 00022 00023 FixedSizeSecBlock<word32, 17*2 + STAGES*sizeof(Stage)> m_state; 00024 unsigned int m_bstart; 00025 }; 00026 00027 /// <a href="http://www.weidai.com/scan-mirror/md.html#Panama">Panama Hash</a> 00028 template <class B = LittleEndian> 00029 class PanamaHash : protected Panama<B>, public IteratedHash<word32, NativeByteOrder, 32> 00030 { 00031 public: 00032 enum {DIGESTSIZE = 32}; 00033 PanamaHash() : IteratedHash<word32, NativeByteOrder, 32>(0) {Panama<B>::Reset();} 00034 unsigned int DigestSize() const {return DIGESTSIZE;} 00035 void TruncatedFinal(byte *hash, unsigned int size); 00036 00037 protected: 00038 void Init() {Panama<B>::Reset();} 00039 void vTransform(const word32 *data) {Iterate(1, data);} // push 00040 unsigned int HashMultipleBlocks(const word32 *input, unsigned int length); 00041 }; 00042 00043 //! . 00044 template <class B = LittleEndian> 00045 class PanamaMAC_Base : public PanamaHash<B>, public VariableKeyLength<32, 0, UINT_MAX>, public MessageAuthenticationCode 00046 { 00047 public: 00048 void UncheckedSetKey(const byte *userKey, unsigned int keylength) 00049 { 00050 m_key.Assign(userKey, keylength); 00051 Restart(); 00052 } 00053 00054 static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN ? "Panama-BE" : "Panama-LE";} 00055 00056 protected: 00057 void Init() 00058 { 00059 PanamaHash<B>::Init(); 00060 Update(m_key, m_key.size()); 00061 } 00062 00063 SecByteBlock m_key; 00064 }; 00065 00066 /// Panama MAC 00067 template <class B = LittleEndian> 00068 class PanamaMAC : public MessageAuthenticationCodeTemplate<PanamaMAC_Base<B> > 00069 { 00070 public: 00071 PanamaMAC() {} 00072 PanamaMAC(const byte *key, unsigned int length=PanamaMAC_Base<B>::DEFAULT_KEYLENGTH) 00073 {SetKey(key, length);} 00074 }; 00075 00076 //! . 00077 template <class B> 00078 struct PanamaCipherInfo : public VariableKeyLength<32, 32, 64, 32, SimpleKeyingInterface::NOT_RESYNCHRONIZABLE> 00079 { 00080 static const char * StaticAlgorithmName() {return B::ToEnum() == BIG_ENDIAN_ORDER ? "Panama-BE" : "Panama-LE";} 00081 }; 00082 00083 //! . 00084 template <class B> 00085 class PanamaCipherPolicy : public AdditiveCipherConcretePolicy<word32, 32>, 00086 public PanamaCipherInfo<B>, 00087 protected Panama<B> 00088 { 00089 protected: 00090 void CipherSetKey(const NameValuePairs &params, const byte *key, unsigned int length); 00091 void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, unsigned int iterationCount); 00092 bool IsRandomAccess() const {return false;} 00093 }; 00094 00095 //! <a href="http://www.weidai.com/scan-mirror/cs.html#Panama">Panama Stream Cipher</a> 00096 template <class B = LittleEndian> 00097 struct PanamaCipher : public PanamaCipherInfo<B>, public SymmetricCipherDocumentation 00098 { 00099 typedef SymmetricCipherFinalTemplate<ConcretePolicyHolder<PanamaCipherPolicy<B>, AdditiveCipherTemplate<> > > Encryption; 00100 typedef Encryption Decryption; 00101 }; 00102 00103 NAMESPACE_END 00104 00105 #endif

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