oaep.h
#ifndef CRYPTOPP_OAEP_H
#define CRYPTOPP_OAEP_H
#include "cryptlib.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
Name::DigestSize
const char * DigestSize()
int, in bytes
Definition: argnames.h:78
OAEP_Base
_
Definition: oaep.h:11
pubkey.h
This file contains helper classes/functions for implementing public key algorithms.
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
PK_EncryptionMessageEncodingMethod
Message encoding method for public key encryption.
Definition: pubkey.h:215
RandomNumberGenerator
Interface for random number generators.
Definition: cryptlib.h:1186
DecodingResult
Returns a decoding results.
Definition: cryptlib.h:236
Name::EncodingParameters
const char * EncodingParameters()
ConstByteArrayParameter.
Definition: argnames.h:65
EncryptionStandard
Base class for public key encryption standard classes.
Definition: pubkey.h:2141
MaskGeneratingFunction
Mask generation function interface.
Definition: pubkey.h:682
sha.h
Classes for SHA-1 and SHA-2 family of message digests.
HashTransformation
Interface for hash functions and data processing part of MACs.
Definition: cryptlib.h:922
CryptoPP
Crypto++ library namespace.
OAEP
EME-OAEP, for use with classes derived from TF_ES
Definition: oaep.h:27
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:277