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# rsa.h

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    00001 #ifndef CRYPTOPP_RSA_H
    00002 #define CRYPTOPP_RSA_H
    00003
    00004 /** \file
    00005         This file contains classes that implement the RSA
    00006         ciphers and signature schemes as defined in PKCS #1 v2.0.
    00007 */
    00008
    00009 #include "pkcspad.h"
    00010 #include "oaep.h"
    00011 #include "integer.h"
    00012 #include "asn.h"
    00013
    00014 NAMESPACE_BEGIN(CryptoPP)
    00015
    00016 //! .
    00017 class CRYPTOPP_DLL RSAFunction : public TrapdoorFunction, public X509PublicKey
    00018 {
    00019         typedef RSAFunction ThisClass;
    00020
    00021 public:
    00022         void Initialize(const Integer &n, const Integer &e)
    00023                 {m_n = n; m_e = e;}
    00024
    00025         // X509PublicKey
    00026         OID GetAlgorithmID() const;
    00027         void BERDecodeKey(BufferedTransformation &bt);
    00028         void DEREncodeKey(BufferedTransformation &bt) const;
    00029
    00030         // CryptoMaterial
    00031         bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
    00032         bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
    00033         void AssignFrom(const NameValuePairs &source);
    00034
    00035         // TrapdoorFunction
    00036         Integer ApplyFunction(const Integer &x) const;
    00037         Integer PreimageBound() const {return m_n;}
    00038         Integer ImageBound() const {return m_n;}
    00039
    00040         // non-derived
    00041         const Integer & GetModulus() const {return m_n;}
    00042         const Integer & GetPublicExponent() const {return m_e;}
    00043
    00044         void SetModulus(const Integer &n) {m_n = n;}
    00045         void SetPublicExponent(const Integer &e) {m_e = e;}
    00046
    00047 protected:
    00048         Integer m_n, m_e;
    00049 };
    00050
    00051 //! .
    00052 class CRYPTOPP_DLL InvertibleRSAFunction : public RSAFunction, public TrapdoorFunctionInverse, public PKCS8PrivateKey
    00053 {
    00054         typedef InvertibleRSAFunction ThisClass;
    00055
    00056 public:
    00057         void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits, const Integer &e = 17);
    00058         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)
    00059                 {m_n = n; m_e = e; m_d = d; m_p = p; m_q = q; m_dp = dp; m_dq = dq; m_u = u;}
    00060
    00061         // PKCS8PrivateKey
    00062         void BERDecode(BufferedTransformation &bt)
    00063                 {PKCS8PrivateKey::BERDecode(bt);}
    00064         void DEREncode(BufferedTransformation &bt) const
    00065                 {PKCS8PrivateKey::DEREncode(bt);}
    00066         void BERDecodeKey(BufferedTransformation &bt);
    00067         void DEREncodeKey(BufferedTransformation &bt) const;
    00068
    00069         // TrapdoorFunctionInverse
    00070         Integer CalculateInverse(const Integer &x) const;
    00071
    00072         // GeneratableCryptoMaterial
    00073         bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
    00074         /*! parameters: (ModulusSize, PublicExponent (default 17)) */
    00075         void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
    00076         bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
    00077         void AssignFrom(const NameValuePairs &source);
    00078
    00079         // non-derived interface
    00080         const Integer& GetPrime1() const {return m_p;}
    00081         const Integer& GetPrime2() const {return m_q;}
    00082         const Integer& GetPrivateExponent() const {return m_d;}
    00083         const Integer& GetModPrime1PrivateExponent() const {return m_dp;}
    00084         const Integer& GetModPrime2PrivateExponent() const {return m_dq;}
    00085         const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
    00086
    00087         void SetPrime1(const Integer &p) {m_p = p;}
    00088         void SetPrime2(const Integer &q) {m_q = q;}
    00089         void SetPrivateExponent(const Integer &d) {m_d = d;}
    00090         void SetModPrime1PrivateExponent(const Integer &dp) {m_dp = dp;}
    00091         void SetModPrime2PrivateExponent(const Integer &dq) {m_dq = dq;}
    00092         void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
    00093
    00094 protected:
    00095         virtual void DEREncodeOptionalAttributes(BufferedTransformation &bt) const {}
    00096         virtual void BERDecodeOptionalAttributes(BufferedTransformation &bt) {}
    00097
    00098         Integer m_d, m_p, m_q, m_dp, m_dq, m_u;
    00099 };
    00100
    00101 /*
    00102 //! .
    00103 class RSAFunctionInverse_NonCRT : public TrapdoorFunctionBounds, public TrapdoorFunctionInverse, public PrivateKey
    00104 {
    00105 public:
    00106         Integer CalculateInverse(const Integer &x) const
    00107                 {return a_exp_b_mod_c(x, m_d, m_n);}
    00108         Integer PreimageBound() const {return m_n;}
    00109         Integer ImageBound() const {return m_n;}
    00110
    00111         bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
    00112
    00113         const Integer& GetModulus() const {return m_n;}
    00114         const Integer& GetDecryptionExponent() const {return m_d;}
    00115
    00116         void SetModulus(const Integer &n) {m_n = n;}
    00117         void SetDecryptionExponent(const Integer &d) {m_d = d;}
    00118
    00119         void SetPrivateValues(const Integer &n, const Integer &d)
    00120                 {m_n = n; m_d = d;}
    00121
    00122 private:
    00123         Integer m_n, m_d;
    00124 };
    00125 */
    00126
    00127 //! .
    00128 struct CRYPTOPP_DLL RSA
    00129 {
    00130         static std::string StaticAlgorithmName() {return "RSA";}
    00131         typedef RSAFunction PublicKey;
    00132         typedef InvertibleRSAFunction PrivateKey;
    00133 };
    00134
    00135 //! <a href="http://www.weidai.com/scan-mirror/ca.html#RSA">RSA cryptosystem</a>
    00136 template <class STANDARD>
    00137 struct RSAES : public TF_ES<STANDARD, RSA>
    00138 {
    00139 };
    00140
    00141 //! <a href="http://www.weidai.com/scan-mirror/sig.html#RSA">RSA signature scheme with appendix</a>
    00142 /*! See documentation of PKCS1v15 for a list of hash functions that can be used with it. */
    00143 template <class STANDARD, class H>
    00144 struct RSASSA : public TF_SSA<STANDARD, H, RSA>
    00145 {
    00146 };
    00147
    00148 // The two RSA encryption schemes defined in PKCS #1 v2.0
    00149 typedef RSAES<PKCS1v15>::Decryptor RSAES_PKCS1v15_Decryptor;
    00150 typedef RSAES<PKCS1v15>::Encryptor RSAES_PKCS1v15_Encryptor;
    00151
    00152 typedef RSAES<OAEP<SHA> >::Decryptor RSAES_OAEP_SHA_Decryptor;
    00153 typedef RSAES<OAEP<SHA> >::Encryptor RSAES_OAEP_SHA_Encryptor;
    00154
    00155 // The three RSA signature schemes defined in PKCS #1 v2.0
    00156 typedef RSASSA<PKCS1v15, SHA>::Signer RSASSA_PKCS1v15_SHA_Signer;
    00157 typedef RSASSA<PKCS1v15, SHA>::Verifier RSASSA_PKCS1v15_SHA_Verifier;
    00158
    00159 typedef RSASSA<PKCS1v15, MD2>::Signer RSASSA_PKCS1v15_MD2_Signer;
    00160 typedef RSASSA<PKCS1v15, MD2>::Verifier RSASSA_PKCS1v15_MD2_Verifier;
    00161
    00162 typedef RSASSA<PKCS1v15, MD5>::Signer RSASSA_PKCS1v15_MD5_Signer;
    00163 typedef RSASSA<PKCS1v15, MD5>::Verifier RSASSA_PKCS1v15_MD5_Verifier;
    00164
    00165 NAMESPACE_END
    00166
    00167 #endif