93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
#ifndef CRYPTOPP_RW_H
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#define CRYPTOPP_RW_H
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/** \file
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This file contains classes that implement the
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Rabin-Williams signature schemes as defined in IEEE P1363.
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*/
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#include "pubkey.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! _
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class CRYPTOPP_DLL RWFunction : public TrapdoorFunction, public PublicKey
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{
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typedef RWFunction ThisClass;
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public:
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void Initialize(const Integer &n)
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{m_n = n;}
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void BERDecode(BufferedTransformation &bt);
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void DEREncode(BufferedTransformation &bt) const;
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Integer ApplyFunction(const Integer &x) const;
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Integer PreimageBound() const {return ++(m_n>>1);}
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Integer ImageBound() const {return m_n;}
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bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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void AssignFrom(const NameValuePairs &source);
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const Integer& GetModulus() const {return m_n;}
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void SetModulus(const Integer &n) {m_n = n;}
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protected:
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Integer m_n;
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};
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//! _
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class CRYPTOPP_DLL InvertibleRWFunction : public RWFunction, public TrapdoorFunctionInverse, public PrivateKey
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{
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typedef InvertibleRWFunction ThisClass;
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public:
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void Initialize(const Integer &n, const Integer &p, const Integer &q, const Integer &u)
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{m_n = n; m_p = p; m_q = q; m_u = u;}
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// generate a random private key
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void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits)
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{GenerateRandomWithKeySize(rng, modulusBits);}
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void BERDecode(BufferedTransformation &bt);
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void DEREncode(BufferedTransformation &bt) const;
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Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
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// GeneratibleCryptoMaterial
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bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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void AssignFrom(const NameValuePairs &source);
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/*! parameters: (ModulusSize) */
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void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
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const Integer& GetPrime1() const {return m_p;}
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const Integer& GetPrime2() const {return m_q;}
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const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
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void SetPrime1(const Integer &p) {m_p = p;}
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void SetPrime2(const Integer &q) {m_q = q;}
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void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
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protected:
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Integer m_p, m_q, m_u;
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};
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//! RW
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struct RW
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{
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static std::string StaticAlgorithmName() {return "RW";}
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typedef RWFunction PublicKey;
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typedef InvertibleRWFunction PrivateKey;
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};
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//! RWSS
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template <class STANDARD, class H>
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struct RWSS : public TF_SS<STANDARD, H, RW>
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{
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};
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NAMESPACE_END
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#endif
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