1#ifndef CRYPTOPP_OAEP_H 2#define CRYPTOPP_OAEP_H 3 4#include "pubkey.h" 5#include "sha.h" 6 7NAMESPACE_BEGIN(CryptoPP) 8 9//! _ 10class CRYPTOPP_DLL OAEP_Base : public PK_EncryptionMessageEncodingMethod 11{ 12public: 13 bool ParameterSupported(const char *name) const {return strcmp(name, Name::EncodingParameters()) == 0;} 14 size_t MaxUnpaddedLength(size_t paddedLength) const; 15 void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs ¶meters) const; 16 DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs ¶meters) const; 17 18protected: 19 virtual unsigned int DigestSize() const =0; 20 virtual HashTransformation * NewHash() const =0; 21 virtual MaskGeneratingFunction * NewMGF() const =0; 22}; 23 24//! <a href="http://www.weidai.com/scan-mirror/ca.html#cem_OAEP-MGF1">EME-OAEP</a>, for use with classes derived from TF_ES 25template <class H, class MGF=P1363_MGF1> 26class OAEP : public OAEP_Base, public EncryptionStandard 27{ 28public: 29 static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("OAEP-") + MGF::StaticAlgorithmName() + "(" + H::StaticAlgorithmName() + ")";} 30 typedef OAEP<H, MGF> EncryptionMessageEncodingMethod; 31 32protected: 33 unsigned int DigestSize() const {return H::DIGESTSIZE;} 34 HashTransformation * NewHash() const {return new H;} 35 MaskGeneratingFunction * NewMGF() const {return new MGF;} 36}; 37 38CRYPTOPP_DLL_TEMPLATE_CLASS OAEP<SHA>; 39 40NAMESPACE_END 41 42#endif 43