Crypto++
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00001 #ifndef CRYPTOPP_RW_H 00002 #define CRYPTOPP_RW_H 00003 00004 /** \file 00005 This file contains classes that implement the 00006 Rabin-Williams signature schemes as defined in IEEE P1363. 00007 */ 00008 00009 #include "pubkey.h" 00010 00011 NAMESPACE_BEGIN(CryptoPP) 00012 00013 //! _ 00014 class CRYPTOPP_DLL RWFunction : public TrapdoorFunction, public PublicKey 00015 { 00016 typedef RWFunction ThisClass; 00017 00018 public: 00019 void Initialize(const Integer &n) 00020 {m_n = n;} 00021 00022 void BERDecode(BufferedTransformation &bt); 00023 void DEREncode(BufferedTransformation &bt) const; 00024 00025 Integer ApplyFunction(const Integer &x) const; 00026 Integer PreimageBound() const {return ++(m_n>>1);} 00027 Integer ImageBound() const {return m_n;} 00028 00029 bool Validate(RandomNumberGenerator &rng, unsigned int level) const; 00030 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; 00031 void AssignFrom(const NameValuePairs &source); 00032 00033 const Integer& GetModulus() const {return m_n;} 00034 void SetModulus(const Integer &n) {m_n = n;} 00035 00036 protected: 00037 Integer m_n; 00038 }; 00039 00040 //! _ 00041 class CRYPTOPP_DLL InvertibleRWFunction : public RWFunction, public TrapdoorFunctionInverse, public PrivateKey 00042 { 00043 typedef InvertibleRWFunction ThisClass; 00044 00045 public: 00046 void Initialize(const Integer &n, const Integer &p, const Integer &q, const Integer &u) 00047 {m_n = n; m_p = p; m_q = q; m_u = u;} 00048 // generate a random private key 00049 void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits) 00050 {GenerateRandomWithKeySize(rng, modulusBits);} 00051 00052 void BERDecode(BufferedTransformation &bt); 00053 void DEREncode(BufferedTransformation &bt) const; 00054 00055 Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const; 00056 00057 // GeneratibleCryptoMaterial 00058 bool Validate(RandomNumberGenerator &rng, unsigned int level) const; 00059 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; 00060 void AssignFrom(const NameValuePairs &source); 00061 /*! parameters: (ModulusSize) */ 00062 void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg); 00063 00064 const Integer& GetPrime1() const {return m_p;} 00065 const Integer& GetPrime2() const {return m_q;} 00066 const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;} 00067 00068 void SetPrime1(const Integer &p) {m_p = p;} 00069 void SetPrime2(const Integer &q) {m_q = q;} 00070 void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;} 00071 00072 protected: 00073 Integer m_p, m_q, m_u; 00074 }; 00075 00076 //! RW 00077 struct RW 00078 { 00079 static std::string StaticAlgorithmName() {return "RW";} 00080 typedef RWFunction PublicKey; 00081 typedef InvertibleRWFunction PrivateKey; 00082 }; 00083 00084 //! RWSS 00085 template <class STANDARD, class H> 00086 struct RWSS : public TF_SS<STANDARD, H, RW> 00087 { 00088 }; 00089 00090 NAMESPACE_END 00091 00092 #endif