/usr/include/crypto++/rabin.h is in libcrypto++-dev 5.6.4-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | // rabin.h - written and placed in the public domain by Wei Dai
//! \file
//! \headerfile rabin.h
//! \brief Classes for Rabin encryption and signature schemes
#ifndef CRYPTOPP_RABIN_H
#define CRYPTOPP_RABIN_H
#include "cryptlib.h"
#include "oaep.h"
#include "pssr.h"
#include "integer.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
class RabinFunction : public TrapdoorFunction, public PublicKey
{
typedef RabinFunction ThisClass;
public:
void Initialize(const Integer &n, const Integer &r, const Integer &s)
{m_n = n; m_r = r; m_s = s;}
void BERDecode(BufferedTransformation &bt);
void DEREncode(BufferedTransformation &bt) const;
Integer ApplyFunction(const Integer &x) const;
Integer PreimageBound() const {return m_n;}
Integer ImageBound() const {return m_n;}
bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
void AssignFrom(const NameValuePairs &source);
const Integer& GetModulus() const {return m_n;}
const Integer& GetQuadraticResidueModPrime1() const {return m_r;}
const Integer& GetQuadraticResidueModPrime2() const {return m_s;}
void SetModulus(const Integer &n) {m_n = n;}
void SetQuadraticResidueModPrime1(const Integer &r) {m_r = r;}
void SetQuadraticResidueModPrime2(const Integer &s) {m_s = s;}
protected:
Integer m_n, m_r, m_s;
};
//! _
class InvertibleRabinFunction : public RabinFunction, public TrapdoorFunctionInverse, public PrivateKey
{
typedef InvertibleRabinFunction ThisClass;
public:
void Initialize(const Integer &n, const Integer &r, const Integer &s,
const Integer &p, const Integer &q, const Integer &u)
{m_n = n; m_r = r; m_s = s; m_p = p; m_q = q; m_u = u;}
void Initialize(RandomNumberGenerator &rng, unsigned int keybits)
{GenerateRandomWithKeySize(rng, keybits);}
void BERDecode(BufferedTransformation &bt);
void DEREncode(BufferedTransformation &bt) const;
Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
void AssignFrom(const NameValuePairs &source);
/*! parameters: (ModulusSize) */
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
const Integer& GetPrime1() const {return m_p;}
const Integer& GetPrime2() const {return m_q;}
const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
void SetPrime1(const Integer &p) {m_p = p;}
void SetPrime2(const Integer &q) {m_q = q;}
void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
protected:
Integer m_p, m_q, m_u;
};
//! Rabin
struct Rabin
{
static std::string StaticAlgorithmName() {return "Rabin-Crypto++Variant";}
typedef RabinFunction PublicKey;
typedef InvertibleRabinFunction PrivateKey;
};
//! Rabin encryption
template <class STANDARD>
struct RabinES : public TF_ES<STANDARD, Rabin>
{
};
//! Rabin signature
template <class STANDARD, class H>
struct RabinSS : public TF_SS<STANDARD, H, Rabin>
{
};
// More typedefs for backwards compatibility
class SHA1;
typedef RabinES<OAEP<SHA1> >::Decryptor RabinDecryptor;
typedef RabinES<OAEP<SHA1> >::Encryptor RabinEncryptor;
NAMESPACE_END
#endif
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