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# haval.h

    00001 #ifndef CRYPTOPP_HAVAL_H
    00002 #define CRYPTOPP_HAVAL_H
    00003
    00004 #include "iterhash.h"
    00005
    00006 NAMESPACE_BEGIN(CryptoPP)
    00007
    00008 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a>
    00009 class HAVAL : public IteratedHash<word32, LittleEndian, 128>
    00010 {
    00011 public:
    00012         enum {DIGESTSIZE = 32, HAVAL_VERSION = 1};
    00013
    00014         /// digestSize can be 16, 20, 24, 28, or 32 (Default=32)<br>
    00015         /// pass can be 3, 4 or 5 (Default=3)
    00016         HAVAL(unsigned int digestSize=DIGESTSIZE, unsigned int passes=3);
    00017         void TruncatedFinal(byte *hash, unsigned int size);
    00018         unsigned int DigestSize() const {return digestSize;}
    00019
    00020         static const char * StaticAlgorithmName() {return "HAVAL";}
    00021         std::string AlgorithmName() const {return std::string("HAVAL(") + IntToString(digestSize) + "," + IntToString(pass) + ")";}
    00022
    00023 protected:
    00024         static const unsigned int wi2[32], wi3[32], wi4[32], wi5[32];
    00025         static const word32 mc2[32], mc3[32], mc4[32], mc5[32];
    00026
    00027         void Init();
    00028         void Tailor(unsigned int FPTLEN);
    00029         void HashEndianCorrectedBlock(const word32 *in);
    00030
    00031         const unsigned int digestSize, pass;
    00032 };
    00033
    00034 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 3 passes
    00035 class HAVAL3 : public HAVAL
    00036 {
    00037 public:
    00038         HAVAL3(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 3) {}
    00039         static void Transform(word32 *buf, const word32 *in);
    00040 };
    00041
    00042 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 4 passes
    00043 class HAVAL4 : public HAVAL
    00044 {
    00045 public:
    00046         HAVAL4(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 4) {}
    00047         static void Transform(word32 *buf, const word32 *in);
    00048 };
    00049
    00050 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 5 passes
    00051 class HAVAL5 : public HAVAL
    00052 {
    00053 public:
    00054         HAVAL5(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 5) {}
    00055         static void Transform(word32 *buf, const word32 *in);
    00056 };
    00057
    00058 NAMESPACE_END
    00059
    00060 #endif