00001 #ifndef CRYPTOPP_RW_H
00002 #define CRYPTOPP_RW_H
00003
00004
00005
00006
00007
00008
00009 #include "integer.h"
00010 #include "pssr.h"
00011
00012 NAMESPACE_BEGIN(CryptoPP)
00013
00014
00015 class RWFunction : virtual public TrapdoorFunction, public PublicKey
00016 {
00017 typedef RWFunction ThisClass;
00018
00019 public:
00020 void Initialize(const Integer &n)
00021 {m_n = n;}
00022
00023 void BERDecode(BufferedTransformation &bt);
00024 void DEREncode(BufferedTransformation &bt) const;
00025
00026 Integer ApplyFunction(const Integer &x) const;
00027 Integer PreimageBound() const {return ++(m_n>>1);}
00028 Integer ImageBound() const {return m_n;}
00029
00030 bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
00031 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
00032 void AssignFrom(const NameValuePairs &source);
00033
00034 const Integer& GetModulus() const {return m_n;}
00035 void SetModulus(const Integer &n) {m_n = n;}
00036
00037 protected:
00038 Integer m_n;
00039 };
00040
00041
00042 class InvertibleRWFunction : public RWFunction, public TrapdoorFunctionInverse, public PrivateKey
00043 {
00044 typedef InvertibleRWFunction ThisClass;
00045
00046 public:
00047 void Initialize(const Integer &n, const Integer &p, const Integer &q, const Integer &u)
00048 {m_n = n; m_p = p; m_q = q; m_u = u;}
00049
00050 void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits)
00051 {GenerateRandomWithKeySize(rng, modulusBits);}
00052
00053 void BERDecode(BufferedTransformation &bt);
00054 void DEREncode(BufferedTransformation &bt) const;
00055
00056 Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
00057
00058
00059 bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
00060 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
00061 void AssignFrom(const NameValuePairs &source);
00062
00063 void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
00064
00065 const Integer& GetPrime1() const {return m_p;}
00066 const Integer& GetPrime2() const {return m_q;}
00067 const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
00068
00069 void SetPrime1(const Integer &p) {m_p = p;}
00070 void SetPrime2(const Integer &q) {m_q = q;}
00071 void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
00072
00073 protected:
00074 Integer m_p, m_q, m_u;
00075 };
00076
00077
00078 class EMSA2Pad : public EMSA2HashIdLookup<PK_DeterministicSignatureMessageEncodingMethod>
00079 {
00080 public:
00081 static const char *StaticAlgorithmName() {return "EMSA2";}
00082
00083 unsigned int MaxUnpaddedLength(unsigned int paddedLength) const {return (paddedLength+1)/8-2;}
00084
00085 void ComputeMessageRepresentative(RandomNumberGenerator &rng,
00086 const byte *recoverableMessage, unsigned int recoverableMessageLength,
00087 HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
00088 byte *representative, unsigned int representativeBitLength) const;
00089 };
00090
00091
00092
00093
00094
00095
00096
00097 struct P1363_EMSA2 : public SignatureStandard
00098 {
00099 typedef EMSA2Pad SignatureMessageEncodingMethod;
00100 };
00101
00102
00103 struct RW
00104 {
00105 static std::string StaticAlgorithmName() {return "RW";}
00106 typedef RWFunction PublicKey;
00107 typedef InvertibleRWFunction PrivateKey;
00108 };
00109
00110
00111 template <class STANDARD, class H>
00112 struct RWSS : public TF_SS<STANDARD, H, RW>
00113 {
00114 };
00115
00116 NAMESPACE_END
00117
00118 #endif