1#ifndef CRYPTOPP_RABIN_H 2#define CRYPTOPP_RABIN_H 3 4/** \file 5*/ 6 7#include "oaep.h" 8#include "pssr.h" 9#include "integer.h" 10 11NAMESPACE_BEGIN(CryptoPP) 12 13//! _ 14class RabinFunction : public TrapdoorFunction, public PublicKey 15{ 16 typedef RabinFunction ThisClass; 17 18public: 19 void Initialize(const Integer &n, const Integer &r, const Integer &s) 20 {m_n = n; m_r = r; m_s = s;} 21 22 void BERDecode(BufferedTransformation &bt); 23 void DEREncode(BufferedTransformation &bt) const; 24 25 Integer ApplyFunction(const Integer &x) const; 26 Integer PreimageBound() const {return m_n;} 27 Integer ImageBound() const {return m_n;} 28 29 bool Validate(RandomNumberGenerator &rng, unsigned int level) const; 30 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; 31 void AssignFrom(const NameValuePairs &source); 32 33 const Integer& GetModulus() const {return m_n;} 34 const Integer& GetQuadraticResidueModPrime1() const {return m_r;} 35 const Integer& GetQuadraticResidueModPrime2() const {return m_s;} 36 37 void SetModulus(const Integer &n) {m_n = n;} 38 void SetQuadraticResidueModPrime1(const Integer &r) {m_r = r;} 39 void SetQuadraticResidueModPrime2(const Integer &s) {m_s = s;} 40 41protected: 42 Integer m_n, m_r, m_s; 43}; 44 45//! _ 46class InvertibleRabinFunction : public RabinFunction, public TrapdoorFunctionInverse, public PrivateKey 47{ 48 typedef InvertibleRabinFunction ThisClass; 49 50public: 51 void Initialize(const Integer &n, const Integer &r, const Integer &s, 52 const Integer &p, const Integer &q, const Integer &u) 53 {m_n = n; m_r = r; m_s = s; m_p = p; m_q = q; m_u = u;} 54 void Initialize(RandomNumberGenerator &rng, unsigned int keybits) 55 {GenerateRandomWithKeySize(rng, keybits);} 56 57 void BERDecode(BufferedTransformation &bt); 58 void DEREncode(BufferedTransformation &bt) const; 59 60 Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const; 61 62 bool Validate(RandomNumberGenerator &rng, unsigned int level) const; 63 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; 64 void AssignFrom(const NameValuePairs &source); 65 /*! parameters: (ModulusSize) */ 66 void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg); 67 68 const Integer& GetPrime1() const {return m_p;} 69 const Integer& GetPrime2() const {return m_q;} 70 const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;} 71 72 void SetPrime1(const Integer &p) {m_p = p;} 73 void SetPrime2(const Integer &q) {m_q = q;} 74 void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;} 75 76protected: 77 Integer m_p, m_q, m_u; 78}; 79 80//! Rabin 81struct Rabin 82{ 83 static std::string StaticAlgorithmName() {return "Rabin-Crypto++Variant";} 84 typedef RabinFunction PublicKey; 85 typedef InvertibleRabinFunction PrivateKey; 86}; 87 88//! Rabin encryption 89template <class STANDARD> 90struct RabinES : public TF_ES<STANDARD, Rabin> 91{ 92}; 93 94//! Rabin signature 95template <class STANDARD, class H> 96struct RabinSS : public TF_SS<STANDARD, H, Rabin> 97{ 98}; 99 100// More typedefs for backwards compatibility 101class SHA1; 102typedef RabinES<OAEP<SHA1> >::Decryptor RabinDecryptor; 103typedef RabinES<OAEP<SHA1> >::Encryptor RabinEncryptor; 104 105NAMESPACE_END 106 107#endif 108