00001 #ifndef CRYPTOPP_OAEP_H
00002 #define CRYPTOPP_OAEP_H
00003
00004 #include "pubkey.h"
00005 #include "sha.h"
00006
00007 NAMESPACE_BEGIN(CryptoPP)
00008
00009
00010 class CRYPTOPP_DLL OAEP_Base : public PK_EncryptionMessageEncodingMethod
00011 {
00012 public:
00013 bool ParameterSupported(const char *name) const {return strcmp(name, Name::EncodingParameters()) == 0;}
00014 size_t MaxUnpaddedLength(size_t paddedLength) const;
00015 void Pad(RandomNumberGenerator &rng, const byte *raw, size_t inputLength, byte *padded, size_t paddedLength, const NameValuePairs ¶meters) const;
00016 DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs ¶meters) const;
00017
00018 protected:
00019 virtual unsigned int DigestSize() const =0;
00020 virtual HashTransformation * NewHash() const =0;
00021 virtual MaskGeneratingFunction * NewMGF() const =0;
00022 };
00023
00024
00025 template <class H, class MGF=P1363_MGF1>
00026 class OAEP : public OAEP_Base, public EncryptionStandard
00027 {
00028 public:
00029 static std::string CRYPTOPP_API StaticAlgorithmName() {return std::string("OAEP-") + MGF::StaticAlgorithmName() + "(" + H::StaticAlgorithmName() + ")";}
00030 typedef OAEP<H, MGF> EncryptionMessageEncodingMethod;
00031
00032 protected:
00033 unsigned int DigestSize() const {return H::DIGESTSIZE;}
00034 HashTransformation * NewHash() const {return new H;}
00035 MaskGeneratingFunction * NewMGF() const {return new MGF;}
00036 };
00037
00038 CRYPTOPP_DLL_TEMPLATE_CLASS OAEP<SHA>;
00039
00040 NAMESPACE_END
00041
00042 #endif