mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-27 11:50:29 +00:00
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
// hc128.h - written and placed in the public domain by Jeffrey Walton
|
|
// based on public domain code by Hongjun Wu.
|
|
//
|
|
// The reference materials and source files are available at
|
|
// The eSTREAM Project, http://www.ecrypt.eu.org/stream/e2-hc128.html.
|
|
|
|
/// \file hc128.h
|
|
/// \brief Classes for HC-128 stream cipher
|
|
/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
|
|
/// eSTREAM Project | HC-128</A> and
|
|
/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
|
|
/// \since Crypto++ 7.1
|
|
|
|
#ifndef CRYPTOPP_HC128_H
|
|
#define CRYPTOPP_HC128_H
|
|
|
|
#include "strciphr.h"
|
|
#include "secblock.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
/// \brief HC-128 stream cipher information
|
|
/// \since Crypto++ 7.1
|
|
struct HC128Info : public FixedKeyLength<16, SimpleKeyingInterface::UNIQUE_IV, 16>
|
|
{
|
|
CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "HC-128"; }
|
|
};
|
|
|
|
/// \brief HC-128 stream cipher implementation
|
|
/// \since Crypto++ 7.1
|
|
class HC128Policy : public AdditiveCipherConcretePolicy<word32, 16>, public HC128Info
|
|
{
|
|
protected:
|
|
void CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length);
|
|
void OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount);
|
|
void CipherResynchronize(byte *keystreamBuffer, const byte *iv, size_t length);
|
|
bool CanOperateKeystream() const { return true; }
|
|
bool CipherIsRandomAccess() const { return false; }
|
|
|
|
void GenerateKeystream(word32* keystream);
|
|
void SetupUpdate();
|
|
|
|
private:
|
|
FixedSizeSecBlock<word32, 16> m_X;
|
|
FixedSizeSecBlock<word32, 16> m_Y;
|
|
FixedSizeSecBlock<word32, 8> m_key;
|
|
FixedSizeSecBlock<word32, 8> m_iv;
|
|
word32 m_T[1024];
|
|
word32 m_ctr;
|
|
};
|
|
|
|
/// \brief HC-128 stream cipher
|
|
/// \details HC-128 is a stream cipher developed by Hongjun Wu. HC-128 is one of the
|
|
/// final four Profile 1 (software) ciphers selected for the eSTREAM portfolio.
|
|
/// \sa <A HREF="http://www.ecrypt.eu.org/stream/e2-hc128.html">The
|
|
/// eSTREAM Project | HC-128</A> and
|
|
/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
|
|
/// \since Crypto++ 7.1
|
|
struct HC128 : public HC128Info, public SymmetricCipherDocumentation
|
|
{
|
|
typedef SymmetricCipherFinal<ConcretePolicyHolder<HC128Policy, AdditiveCipherTemplate<> >, HC128Info> Encryption;
|
|
typedef Encryption Decryption;
|
|
};
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif // CRYPTOPP_HC128_H
|