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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 protected:
00021         static const unsigned int wi2[32], wi3[32], wi4[32], wi5[32];
00022         static const word32 mc2[32], mc3[32], mc4[32], mc5[32];
00023 
00024         void Init();
00025         void Tailor(unsigned int FPTLEN);
00026         void vTransform(const word32 *in);
00027 
00028         const unsigned int digestSize, pass;
00029 };
00030 
00031 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 3 passes
00032 class HAVAL3 : public HAVAL
00033 {
00034 public:
00035         HAVAL3(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 3) {}
00036         static void Transform(word32 *buf, const word32 *in);
00037 };
00038 
00039 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 4 passes
00040 class HAVAL4 : public HAVAL
00041 {
00042 public:
00043         HAVAL4(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 4) {}
00044         static void Transform(word32 *buf, const word32 *in);
00045 };
00046 
00047 /// <a href="http://www.weidai.com/scan-mirror/md.html#HAVAL">HAVAL</a> with 5 passes
00048 class HAVAL5 : public HAVAL
00049 {
00050 public:
00051         HAVAL5(unsigned int digestSize=DIGESTSIZE) : HAVAL(digestSize, 5) {}
00052         static void Transform(word32 *buf, const word32 *in);
00053 };
00054 
00055 NAMESPACE_END
00056 
00057 #endif

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