Go to the documentation of this file.00001 #ifndef CRYPTOPP_RABIN_H
00002 #define CRYPTOPP_RABIN_H
00003
00004
00005
00006
00007 #include "oaep.h"
00008 #include "pssr.h"
00009 #include "integer.h"
00010
00011 NAMESPACE_BEGIN(CryptoPP)
00012
00013
00014 class RabinFunction : public TrapdoorFunction, public PublicKey
00015 {
00016 typedef RabinFunction ThisClass;
00017
00018 public:
00019 void Initialize(const Integer &n, const Integer &r, const Integer &s)
00020 {m_n = n; m_r = r; m_s = s;}
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;}
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 const Integer& GetQuadraticResidueModPrime1() const {return m_r;}
00035 const Integer& GetQuadraticResidueModPrime2() const {return m_s;}
00036
00037 void SetModulus(const Integer &n) {m_n = n;}
00038 void SetQuadraticResidueModPrime1(const Integer &r) {m_r = r;}
00039 void SetQuadraticResidueModPrime2(const Integer &s) {m_s = s;}
00040
00041 protected:
00042 Integer m_n, m_r, m_s;
00043 };
00044
00045
00046 class InvertibleRabinFunction : public RabinFunction, public TrapdoorFunctionInverse, public PrivateKey
00047 {
00048 typedef InvertibleRabinFunction ThisClass;
00049
00050 public:
00051 void Initialize(const Integer &n, const Integer &r, const Integer &s,
00052 const Integer &p, const Integer &q, const Integer &u)
00053 {m_n = n; m_r = r; m_s = s; m_p = p; m_q = q; m_u = u;}
00054 void Initialize(RandomNumberGenerator &rng, unsigned int keybits)
00055 {GenerateRandomWithKeySize(rng, keybits);}
00056
00057 void BERDecode(BufferedTransformation &bt);
00058 void DEREncode(BufferedTransformation &bt) const;
00059
00060 Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
00061
00062 bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
00063 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
00064 void AssignFrom(const NameValuePairs &source);
00065
00066 void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
00067
00068 const Integer& GetPrime1() const {return m_p;}
00069 const Integer& GetPrime2() const {return m_q;}
00070 const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
00071
00072 void SetPrime1(const Integer &p) {m_p = p;}
00073 void SetPrime2(const Integer &q) {m_q = q;}
00074 void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
00075
00076 protected:
00077 Integer m_p, m_q, m_u;
00078 };
00079
00080
00081 struct Rabin
00082 {
00083 static std::string StaticAlgorithmName() {return "Rabin-Crypto++Variant";}
00084 typedef RabinFunction PublicKey;
00085 typedef InvertibleRabinFunction PrivateKey;
00086 };
00087
00088
00089 template <class STANDARD>
00090 struct RabinES : public TF_ES<STANDARD, Rabin>
00091 {
00092 };
00093
00094
00095 template <class STANDARD, class H>
00096 struct RabinSS : public TF_SS<STANDARD, H, Rabin>
00097 {
00098 };
00099
00100
00101 class SHA1;
00102 typedef RabinES<OAEP<SHA1> >::Decryptor RabinDecryptor;
00103 typedef RabinES<OAEP<SHA1> >::Encryptor RabinEncryptor;
00104
00105 NAMESPACE_END
00106
00107 #endif