mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-30 13:20:30 +00:00
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
// hc256.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/hc256.html.
|
|
|
|
/// \file hc256.h
|
|
/// \brief Classes for HC-256 stream cipher
|
|
/// \sa <A HREF="http://www.ecrypt.eu.org/stream/hc256.html">The
|
|
/// eSTREAM Project | HC-256</A> and
|
|
/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
|
|
/// \since Crypto++ 7.1
|
|
|
|
#ifndef CRYPTOPP_HC256_H
|
|
#define CRYPTOPP_HC256_H
|
|
|
|
#include "strciphr.h"
|
|
#include "secblock.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
/// \brief HC-256 stream cipher information
|
|
/// \since Crypto++ 7.1
|
|
struct HC256Info : public FixedKeyLength<32, SimpleKeyingInterface::UNIQUE_IV, 32>
|
|
{
|
|
CRYPTOPP_STATIC_CONSTEXPR const char* StaticAlgorithmName() { return "HC-256"; }
|
|
};
|
|
|
|
/// \brief HC-256 stream cipher implementation
|
|
/// \since Crypto++ 7.1
|
|
class HC256Policy : public AdditiveCipherConcretePolicy<word32, 4>, public HC256Info
|
|
{
|
|
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; }
|
|
|
|
word32 H1(word32 u);
|
|
word32 H2(word32 u);
|
|
word32 Generate();
|
|
|
|
private:
|
|
FixedSizeSecBlock<word32, 8> m_key;
|
|
FixedSizeSecBlock<word32, 8> m_iv;
|
|
word32 m_P[1024];
|
|
word32 m_Q[1024];
|
|
word32 m_ctr;
|
|
};
|
|
|
|
/// \brief HC-256 stream cipher
|
|
/// \details HC-256 is a stream cipher developed by Hongjun Wu. HC-256 is the
|
|
/// successor to HC-128 from the eSTREAM project.
|
|
/// \sa <A HREF="http://www.ecrypt.eu.org/stream/hc256.html">The
|
|
/// eSTREAM Project | HC-256</A> and
|
|
/// <A HREF="https://www.cryptopp.com/wiki/HC-128">Crypto++ Wiki | HC-128</A>.
|
|
/// \since Crypto++ 7.1
|
|
struct HC256 : public HC256Info, public SymmetricCipherDocumentation
|
|
{
|
|
typedef SymmetricCipherFinal<ConcretePolicyHolder<HC256Policy, AdditiveCipherTemplate<> >, HC256Info> Encryption;
|
|
typedef Encryption Decryption;
|
|
};
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif // CRYPTOPP_HC256_H
|