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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 "pubkey.h"
    00010 #include "asn.h"
    00011 #include "pkcspad.h"
    00012 #include "oaep.h"
    00013 #include "emsa2.h"
    00014
    00015 NAMESPACE_BEGIN(CryptoPP)
    00016
    00017 //! _
    00018 class CRYPTOPP_DLL RSAFunction : public TrapdoorFunction, public X509PublicKey
    00019 {
    00020         typedef RSAFunction ThisClass;
    00021
    00022 public:
    00023         void Initialize(const Integer &n, const Integer &e)
    00024                 {m_n = n; m_e = e;}
    00025
    00026         // X509PublicKey
    00027         OID GetAlgorithmID() const;
    00028         void BERDecodePublicKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
    00029         void DEREncodePublicKey(BufferedTransformation &bt) const;
    00030
    00031         // CryptoMaterial
    00032         bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
    00033         bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
    00034         void AssignFrom(const NameValuePairs &source);
    00035
    00036         // TrapdoorFunction
    00037         Integer ApplyFunction(const Integer &x) const;
    00038         Integer PreimageBound() const {return m_n;}
    00039         Integer ImageBound() const {return m_n;}
    00040
    00041         // non-derived
    00042         const Integer & GetModulus() const {return m_n;}
    00043         const Integer & GetPublicExponent() const {return m_e;}
    00044
    00045         void SetModulus(const Integer &n) {m_n = n;}
    00046         void SetPublicExponent(const Integer &e) {m_e = e;}
    00047
    00048 protected:
    00049         Integer m_n, m_e;
    00050 };
    00051
    00052 //! _
    00053 class CRYPTOPP_DLL InvertibleRSAFunction : public RSAFunction, public TrapdoorFunctionInverse, public PKCS8PrivateKey
    00054 {
    00055         typedef InvertibleRSAFunction ThisClass;
    00056
    00057 public:
    00058         void Initialize(RandomNumberGenerator &rng, unsigned int modulusBits, const Integer &e = 17);
    00059         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)
    00060                 {m_n = n; m_e = e; m_d = d; m_p = p; m_q = q; m_dp = dp; m_dq = dq; m_u = u;}
    00061         //! factor n given private exponent
    00062         void Initialize(const Integer &n, const Integer &e, const Integer &d);
    00063
    00064         // PKCS8PrivateKey
    00065         void BERDecode(BufferedTransformation &bt)
    00066                 {PKCS8PrivateKey::BERDecode(bt);}
    00067         void DEREncode(BufferedTransformation &bt) const
    00068                 {PKCS8PrivateKey::DEREncode(bt);}
    00069         void Load(BufferedTransformation &bt)
    00070                 {PKCS8PrivateKey::BERDecode(bt);}
    00071         void Save(BufferedTransformation &bt) const
    00072                 {PKCS8PrivateKey::DEREncode(bt);}
    00073         OID GetAlgorithmID() const {return RSAFunction::GetAlgorithmID();}
    00074         void BERDecodePrivateKey(BufferedTransformation &bt, bool parametersPresent, size_t size);
    00075         void DEREncodePrivateKey(BufferedTransformation &bt) const;
    00076
    00077         // TrapdoorFunctionInverse
    00078         Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
    00079
    00080         // GeneratableCryptoMaterial
    00081         bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
    00082         /*! parameters: (ModulusSize, PublicExponent (default 17)) */
    00083         void GenerateRandom(RandomNumberGenerator &rng, const NameValuePairs &alg);
    00084         bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
    00085         void AssignFrom(const NameValuePairs &source);
    00086
    00087         // non-derived interface
    00088         const Integer& GetPrime1() const {return m_p;}
    00089         const Integer& GetPrime2() const {return m_q;}
    00090         const Integer& GetPrivateExponent() const {return m_d;}
    00091         const Integer& GetModPrime1PrivateExponent() const {return m_dp;}
    00092         const Integer& GetModPrime2PrivateExponent() const {return m_dq;}
    00093         const Integer& GetMultiplicativeInverseOfPrime2ModPrime1() const {return m_u;}
    00094
    00095         void SetPrime1(const Integer &p) {m_p = p;}
    00096         void SetPrime2(const Integer &q) {m_q = q;}
    00097         void SetPrivateExponent(const Integer &d) {m_d = d;}
    00098         void SetModPrime1PrivateExponent(const Integer &dp) {m_dp = dp;}
    00099         void SetModPrime2PrivateExponent(const Integer &dq) {m_dq = dq;}
    00100         void SetMultiplicativeInverseOfPrime2ModPrime1(const Integer &u) {m_u = u;}
    00101
    00102 protected:
    00103         Integer m_d, m_p, m_q, m_dp, m_dq, m_u;
    00104 };
    00105
    00106 class CRYPTOPP_DLL RSAFunction_ISO : public RSAFunction
    00107 {
    00108 public:
    00109         Integer ApplyFunction(const Integer &x) const;
    00110         Integer PreimageBound() const {return ++(m_n>>1);}
    00111 };
    00112
    00113 class CRYPTOPP_DLL InvertibleRSAFunction_ISO : public InvertibleRSAFunction
    00114 {
    00115 public:
    00116         Integer CalculateInverse(RandomNumberGenerator &rng, const Integer &x) const;
    00117         Integer PreimageBound() const {return ++(m_n>>1);}
    00118 };
    00119
    00120 //! RSA
    00121 struct CRYPTOPP_DLL RSA
    00122 {
    00123         static const char * CRYPTOPP_API StaticAlgorithmName() {return "RSA";}
    00124         typedef RSAFunction PublicKey;
    00125         typedef InvertibleRSAFunction PrivateKey;
    00126 };
    00127
    00128 //! <a href="http://www.weidai.com/scan-mirror/ca.html#RSA">RSA cryptosystem</a>
    00129 template <class STANDARD>
    00130 struct RSAES : public TF_ES<STANDARD, RSA>
    00131 {
    00132 };
    00133
    00134 //! <a href="http://www.weidai.com/scan-mirror/sig.html#RSA">RSA signature scheme with appendix</a>
    00135 /*! See documentation of PKCS1v15 for a list of hash functions that can be used with it. */
    00136 template <class STANDARD, class H>
    00137 struct RSASS : public TF_SS<STANDARD, H, RSA>
    00138 {
    00139 };
    00140
    00141 struct CRYPTOPP_DLL RSA_ISO
    00142 {
    00143         static const char * CRYPTOPP_API StaticAlgorithmName() {return "RSA-ISO";}
    00144         typedef RSAFunction_ISO PublicKey;
    00145         typedef InvertibleRSAFunction_ISO PrivateKey;
    00146 };
    00147
    00148 template <class H>
    00149 struct RSASS_ISO : public TF_SS<P1363_EMSA2, H, RSA_ISO>
    00150 {
    00151 };
    00152
    00153 // The two RSA encryption schemes defined in PKCS #1 v2.0
    00154 typedef RSAES<PKCS1v15>::Decryptor RSAES_PKCS1v15_Decryptor;
    00155 typedef RSAES<PKCS1v15>::Encryptor RSAES_PKCS1v15_Encryptor;
    00156
    00157 typedef RSAES<OAEP<SHA> >::Decryptor RSAES_OAEP_SHA_Decryptor;
    00158 typedef RSAES<OAEP<SHA> >::Encryptor RSAES_OAEP_SHA_Encryptor;
    00159
    00160 // The three RSA signature schemes defined in PKCS #1 v2.0
    00161 typedef RSASS<PKCS1v15, SHA>::Signer RSASSA_PKCS1v15_SHA_Signer;
    00162 typedef RSASS<PKCS1v15, SHA>::Verifier RSASSA_PKCS1v15_SHA_Verifier;
    00163
    00164 namespace Weak {
    00165 typedef RSASS<PKCS1v15, Weak1::MD2>::Signer RSASSA_PKCS1v15_MD2_Signer;
    00166 typedef RSASS<PKCS1v15, Weak1::MD2>::Verifier RSASSA_PKCS1v15_MD2_Verifier;
    00167
    00168 typedef RSASS<PKCS1v15, Weak1::MD5>::Signer RSASSA_PKCS1v15_MD5_Signer;
    00169 typedef RSASS<PKCS1v15, Weak1::MD5>::Verifier RSASSA_PKCS1v15_MD5_Verifier;
    00170 }
    00171
    00172 NAMESPACE_END
    00173
    00174 #endif