rsa.h
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#ifndef CRYPTOPP_RSA_H
#define CRYPTOPP_RSA_H
/** \file
This file contains classes that implement the RSA
ciphers and signature schemes as defined in PKCS #1 v2.0.
*/
#include "pubkey.h"
#include "asn.h"
#include "pkcspad.h"
#include "oaep.h"
#include "emsa2.h"
NAMESPACE_BEGIN(CryptoPP)
//! _
class CRYPTOPP_DLL RSAFunction : public TrapdoorFunction, public X509PublicKey
{
typedef RSAFunction ThisClass;
public:
void Initialize(const Integer &n, const Integer &e)
{m_n = n; m_e = e;}
// X509PublicKey
OID GetAlgorithmID() const;
void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
void DEREncodePublicKey(BufferedTransformation &bt) const;
// CryptoMaterial
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);
// TrapdoorFunction
Integer ApplyFunction(const Integer &x) const;
Integer PreimageBound() const {return m_n;}
Integer ImageBound() const {return m_n;}
// non-derived
const Integer & GetModulus() const {return m_n;}
const Integer & GetPublicExponent() const {return m_e;}
void SetModulus(const Integer &n) {m_n = n;}
void SetPublicExponent(const Integer &e) {m_e = e;}
protected:
Integer m_n, m_e;
};
//! _
class CRYPTOPP_DLL InvertibleRSAFunction : public RSAFunction, public TrapdoorFunctionInverse, public PKCS8PrivateKey
{
typedef InvertibleRSAFunction ThisClass;
public:
void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits, const Integer &e = 17);
void Initialize(const Integer &n, const Integer &e, const Integer &d, const Integer &p, const Integer &q, const Integer &dp, const Integer &dq, const Integer &u)
{m_n = n; m_e = e; m_d = d; m_p = p; m_q = q; m_dp = dp; m_dq = dq; m_u = u;}
//! factor n given private exponent
void Initialize(const Integer &n, const Integer &e, const Integer &d);
// PKCS8PrivateKey
void BERDecode(BufferedTransformation &bt)
{PKCS8PrivateKey::BERDecode(bt);}
void DEREncode(BufferedTransformation &bt) const
{PKCS8PrivateKey::DEREncode(bt);}
void Load(BufferedTransformation &bt)
{PKCS8PrivateKey::BERDecode(bt);}
void Save(BufferedTransformation &bt) const
{PKCS8PrivateKey::DEREncode(bt);}
OID GetAlgorithmID() const {return RSAFunction::GetAlgorithmID();}
void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
void DEREncodePrivateKey(BufferedTransformation &bt) const;
// TrapdoorFunctionInverse
Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
// GeneratableCryptoMaterial
bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
/*! parameters: (ModulusSize, PublicExponent (default 17)) */
void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
void AssignFrom(const NameValuePairs &source);
// non-derived interface
const Integer& GetPrime1() const {return m_p;}
const Integer& GetPrime2() const {return m_q;}
const Integer& GetPrivateExponent() const {return m_d;}
const Integer& GetModPrime1PrivateExponent() const {return m_dp;}
const Integer& GetModPrime2PrivateExponent() const {return m_dq;}
const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
void SetPrime1(const Integer &p) {m_p = p;}
void SetPrime2(const Integer &q) {m_q = q;}
void SetPrivateExponent(const Integer &d) {m_d = d;}
void SetModPrime1PrivateExponent(const Integer &dp) {m_dp = dp;}
void SetModPrime2PrivateExponent(const Integer &dq) {m_dq = dq;}
void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
protected:
Integer m_d, m_p, m_q, m_dp, m_dq, m_u;
};
class CRYPTOPP_DLL RSAFunction_ISO : public RSAFunction
{
public:
Integer ApplyFunction(const Integer &x) const;
Integer PreimageBound() const {return ++(m_n>>1);}
};
class CRYPTOPP_DLL InvertibleRSAFunction_ISO : public InvertibleRSAFunction
{
public:
Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
Integer PreimageBound() const {return ++(m_n>>1);}
};
//! RSA
struct CRYPTOPP_DLL RSA
{
static const char * CRYPTOPP_API StaticAlgorithmName() {return "RSA";}
typedef RSAFunction PublicKey;
typedef InvertibleRSAFunction PrivateKey;
};
//! <a href="http://www.weidai.com/scan-mirror/ca.html#RSA">RSA cryptosystem</a>
template <class STANDARD>
struct RSAES : public TF_ES<STANDARD, RSA>
{
};
//! <a href="http://www.weidai.com/scan-mirror/sig.html#RSA">RSA signature scheme with appendix</a>
/*! See documentation of PKCS1v15 for a list of hash functions that can be used with it. */
template <class STANDARD, class H>
struct RSASS : public TF_SS<STANDARD, H, RSA>
{
};
struct CRYPTOPP_DLL RSA_ISO
{
static const char * CRYPTOPP_API StaticAlgorithmName() {return "RSA-ISO";}
typedef RSAFunction_ISO PublicKey;
typedef InvertibleRSAFunction_ISO PrivateKey;
};
template <class H>
struct RSASS_ISO : public TF_SS<P1363_EMSA2, H, RSA_ISO>
{
};
// The two RSA encryption schemes defined in PKCS #1 v2.0
typedef RSAES<PKCS1v15>::Decryptor RSAES_PKCS1v15_Decryptor;
typedef RSAES<PKCS1v15>::Encryptor RSAES_PKCS1v15_Encryptor;
typedef RSAES<OAEP<SHA> >::Decryptor RSAES_OAEP_SHA_Decryptor;
typedef RSAES<OAEP<SHA> >::Encryptor RSAES_OAEP_SHA_Encryptor;
// The three RSA signature schemes defined in PKCS #1 v2.0
typedef RSASS<PKCS1v15, SHA>::Signer RSASSA_PKCS1v15_SHA_Signer;
typedef RSASS<PKCS1v15, SHA>::Verifier RSASSA_PKCS1v15_SHA_Verifier;
namespace Weak {
typedef RSASS<PKCS1v15, Weak1::MD2>::Signer RSASSA_PKCS1v15_MD2_Signer;
typedef RSASS<PKCS1v15, Weak1::MD2>::Verifier RSASSA_PKCS1v15_MD2_Verifier;
typedef RSASS<PKCS1v15, Weak1::MD5>::Signer RSASSA_PKCS1v15_MD5_Signer;
typedef RSASS<PKCS1v15, Weak1::MD5>::Verifier RSASSA_PKCS1v15_MD5_Verifier;
}
NAMESPACE_END
#endif