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#ifndef CRYPTOPP_HAVAL_H
#define CRYPTOPP_HAVAL_H
#include "iterhash.h"
NAMESPACE_BEGIN(CryptoPP)
/// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a>
/*! \warning HAVAL with 128-bit or 160-bit output is considered insecure, and should not be used
unless you absolutely need it for compatibility. */
class HAVAL : public IteratedHash<word32, LittleEndian, 128>
{
public:
enum {HAVAL_VERSION = 1};
CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
/// digestSize can be 16, 20, 24, 28, or 32 (Default=32)<br>
/// pass can be 3, 4 or 5 (Default=3)
HAVAL(unsigned int digestSize=DIGESTSIZE, unsigned int passes=3);
void TruncatedFinal(byte *hash, size_t size);
unsigned int DigestSize() const {return digestSize;}
static const char * StaticAlgorithmName() {return "HAVAL";}
std::string AlgorithmName() const {return std::string("HAVAL(") + IntToString(digestSize) + "," + IntToString(pass) + ")";}
protected:
static const unsigned int wi2[32], wi3[32], wi4[32], wi5[32];
static const word32 mc2[32], mc3[32], mc4[32], mc5[32];
void Init();
void Tailor(unsigned int FPTLEN);
void HashEndianCorrectedBlock(const word32 *in);
const unsigned int digestSize, pass;
};
/// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 3 passes
class HAVAL3 : public HAVAL
{
public:
HAVAL3(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 3) {}
static void Transform(word32 *buf, const word32 *in);
};
/// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 4 passes
class HAVAL4 : public HAVAL
{
public:
HAVAL4(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 4) {}
static void Transform(word32 *buf, const word32 *in);
};
/// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 5 passes
class HAVAL5 : public HAVAL
{
public:
HAVAL5(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 5) {}
static void Transform(word32 *buf, const word32 *in);
};
NAMESPACE_END
#endif
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