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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 /*! \warning HAVAL with 128-bit or 160-bit output is considered insecure, and should not be used
    00010         unless you absolutely need it for compatibility. */
    00011 class HAVAL : public IteratedHash<word32, LittleEndian, 128>
    00012 {
    00013 public:
    00014         enum {HAVAL_VERSION = 1};
    00015         CRYPTOPP_CONSTANT(DIGESTSIZE = 32)
    00016
    00017         /// digestSize can be 16, 20, 24, 28, or 32 (Default=32)<br>
    00018         /// pass can be 3, 4 or 5 (Default=3)
    00019         HAVAL(unsigned int digestSize=DIGESTSIZE, unsigned int passes=3);
    00020         void TruncatedFinal(byte *hash, size_t size);
    00021         unsigned int DigestSize() const {return digestSize;}
    00022
    00023         static const char * StaticAlgorithmName() {return "HAVAL";}
    00024         std::string AlgorithmName() const {return std::string("HAVAL(") + IntToString(digestSize) + "," + IntToString(pass) + ")";}
    00025
    00026 protected:
    00027         static const unsigned int wi2[32], wi3[32], wi4[32], wi5[32];
    00028         static const word32 mc2[32], mc3[32], mc4[32], mc5[32];
    00029
    00030         void Init();
    00031         void Tailor(unsigned int FPTLEN);
    00032         void HashEndianCorrectedBlock(const word32 *in);
    00033
    00034         const unsigned int digestSize, pass;
    00035 };
    00036
    00037 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 3 passes
    00038 class HAVAL3 : public HAVAL
    00039 {
    00040 public:
    00041         HAVAL3(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 3) {}
    00042         static void Transform(word32 *buf, const word32 *in);
    00043 };
    00044
    00045 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 4 passes
    00046 class HAVAL4 : public HAVAL
    00047 {
    00048 public:
    00049         HAVAL4(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 4) {}
    00050         static void Transform(word32 *buf, const word32 *in);
    00051 };
    00052
    00053 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 5 passes
    00054 class HAVAL5 : public HAVAL
    00055 {
    00056 public:
    00057         HAVAL5(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 5) {}
    00058         static void Transform(word32 *buf, const word32 *in);
    00059 };
    00060
    00061 NAMESPACE_END
    00062
    00063 #endif