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-rw-r--r--CryptoPP/oaep.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/CryptoPP/oaep.h b/CryptoPP/oaep.h
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+++ b/CryptoPP/oaep.h
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+#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 &parameters) const;
+ DecodingResult Unpad(const byte *padded, size_t paddedLength, byte *raw, const NameValuePairs &parameters) 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