#ifndef CRYPTOPP_OAEP_H #define CRYPTOPP_OAEP_H #include "pubkey.h" #include "sha.h" NAMESPACE_BEGIN(CryptoPP) //! _ class CRYPTOPP_DLL OAEP_Base : public PK_EncryptionMessageEncodingMethod { public: bool ParameterSupported(const char *name) const {return strcmp(name, Name::EncodingParameters()) == 0;} size_t MaxUnpaddedLength(size_t paddedLength) const; void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs ¶meters) const; DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs ¶meters) const; protected: virtual unsigned int DigestSize() const =0; virtual HashTransformation * NewHash() const =0; virtual MaskGeneratingFunction * NewMGF() const =0; }; //! <a href="http://www.weidai.com/scan-mirror/ca.html#cem_OAEP-MGF1">EME-OAEP</a>, for use with classes derived from TF_ES template <class H, class MGF=P1363_MGF1> class OAEP : public OAEP_Base, public EncryptionStandard { public: static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("OAEP-") + MGF::StaticAlgorithmName() + "(" + H::StaticAlgorithmName() + ")";} typedef OAEP<H, MGF> EncryptionMessageEncodingMethod; protected: unsigned int DigestSize() const {return H::DIGESTSIZE;} HashTransformation * NewHash() const {return new H;} MaskGeneratingFunction * NewMGF() const {return new MGF;} }; CRYPTOPP_DLL_TEMPLATE_CLASS OAEP<SHA>; NAMESPACE_END #endif