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korayakov
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Файл:Документация по криптоалгоритмам / CRYPTO30 / rabin
.h#ifndef CRYPTOPP_RABIN_H
#define CRYPTOPP_RABIN_H
#include "oaep.h"
#include "pssr.h"
#include "integer.h"
NAMESPACE_BEGIN(CryptoPP)
class RabinFunction : virtual public TrapdoorFunction
{
public:
RabinFunction(const Integer &n, const Integer &r, const Integer &s);
RabinFunction(BufferedTransformation &bt);
void DEREncode(BufferedTransformation &bt) const;
Integer ApplyFunction(const Integer &x) const;
Integer MaxPreimage() const {return n-1;}
Integer MaxImage() const {return n-1;}
protected:
RabinFunction() {} // to be used only by InvertableRabinFunction
Integer n, r, s; // these are only modified in constructors
};
class InvertableRabinFunction : public RabinFunction, public InvertableTrapdoorFunction
{
public:
InvertableRabinFunction(const Integer &n, const Integer &r, const Integer &s,
const Integer &p, const Integer &q, const Integer &u);
// generate a random private key
InvertableRabinFunction(RandomNumberGenerator &rng, unsigned int keybits);
InvertableRabinFunction(BufferedTransformation &bt);
void DEREncode(BufferedTransformation &bt) const;
Integer CalculateInverse(const Integer &x) const;
protected:
Integer p, q, u;
};
template <class B>
class RabinPrivateKeyTemplate : public B
{
public:
RabinPrivateKeyTemplate(const Integer &n, const Integer &r, const Integer &s,
const Integer &p, const Integer &q, const Integer &u)
: PublicKeyBaseTemplate<InvertableRabinFunction>(
InvertableRabinFunction(n, r, s, p, q, u)) {}
RabinPrivateKeyTemplate(RandomNumberGenerator &rng, unsigned int keybits)
: PublicKeyBaseTemplate<InvertableRabinFunction>(
InvertableRabinFunction(rng, keybits)) {}
RabinPrivateKeyTemplate(BufferedTransformation &bt)
: PublicKeyBaseTemplate<InvertableRabinFunction>(bt) {}
};
template <class B, class V>
class RabinPublicKeyTemplate : public B
{
public:
RabinPublicKeyTemplate(const Integer &n, const Integer &r, const Integer &s)
: PublicKeyBaseTemplate<RabinFunction>(RabinFunction(n, r, s)) {}
RabinPublicKeyTemplate(const V &priv)
: PublicKeyBaseTemplate<RabinFunction>(priv.GetTrapdoorFunction()) {}
RabinPublicKeyTemplate(BufferedTransformation &bt)
: PublicKeyBaseTemplate<RabinFunction>(bt) {}
};
class SHA;
typedef RabinPrivateKeyTemplate<DecryptorTemplate<OAEP<SHA>, InvertableRabinFunction> >
RabinDecryptor;
typedef RabinPublicKeyTemplate<EncryptorTemplate<OAEP<SHA>, RabinFunction>, RabinDecryptor>
RabinEncryptor;
// simulate template typedef
#define RabinSignerWith(H) RabinPrivateKeyTemplate<SignerWithRecoveryTemplate<InvertableRabinFunction, PSSR<H> > >
#define RabinVerifierWith(H) RabinPublicKeyTemplate<VerifierWithRecoveryTemplate<RabinFunction, PSSR<H> >, RabinSignerWith(H) >
NAMESPACE_END
#endif
Соседние файлы в папке CRYPTO30