~zooko/cryptopp/trunk

#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