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rw.h
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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