Java Hash Calculate Hash32(byte[] v, int iStart, int iLength)

Description

Hash

License

Open Source License

Declaration

public static int Hash32(byte[] v, int iStart, int iLength) 

Method Source Code

//package com.java2s;
/*//from  www .  j  av a2 s  .co  m
  KeePass Password Safe - The Open-Source Password Manager
  Copyright (C) 2003-2014 Dominik Reichl <dominik.reichl@t-online.de>
    
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
    
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
    
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

public class Main {
    private static final int[] m_vSBox = new int[] { 0xCD2FACB3, 0xE78A7F5C, 0x6F0803FC, 0xBCF6E230, 0x3A321712,
            0x06403DB1, 0xD2F84B95, 0xDF22A6E4, 0x07CE9E5B, 0x31788A0C, 0xF683F6F4, 0xEA061F49, 0xFA5C2ACA,
            0x4B9E494E, 0xB0AB25BA, 0x767731FC, 0x261893A7, 0x2B09F2CE, 0x046261E4, 0x41367B4B, 0x18A7F225,
            0x8F923C0E, 0x5EF3A325, 0x28D0435E, 0x84C22919, 0xED66873C, 0x8CEDE444, 0x7FC47C24, 0xFCFC6BA3,
            0x676F928D, 0xB4147187, 0xD8FB126E, 0x7D798D17, 0xFF82E424, 0x1712FA5B, 0xABB09DD5, 0x8156BA63,
            0x84E4D969, 0xC937FB9A, 0x2F1E5BFC, 0x178ECA11, 0x0E71CD5F, 0x52AAC6F4, 0x71EEFC8F, 0x7090D749,
            0x21CACA31, 0x92996378, 0x0939A8A8, 0xE9EE1934, 0xD2718616, 0xF2500543, 0xB911873C, 0xD3CB3EEC,
            0x2BA0DBEB, 0xB42D0A27, 0xECE67C0F, 0x302925F0, 0x6114F839, 0xD39E6307, 0xE28970D6, 0xEB982F99,
            0x941B4CDF, 0xC540E550, 0x8124FC45, 0x98B025C7, 0xE2BF90EA, 0x4F57C976, 0xCF546FE4, 0x59566DC8,
            0xE3F4360D, 0xF5F9D231, 0xD6180B22, 0xB54E088A, 0xB5DFE6A6, 0x3637A36F, 0x056E9284, 0xAFF8FBC5,
            0x19E01648, 0x8611F043, 0xDAE44337, 0xF61B6A1C, 0x257ACD9E, 0xDD35F507, 0xEF05CAFA, 0x05EB4A83,
            0xFC25CA92, 0x0A4728E6, 0x9CF150EF, 0xAEEF67DE, 0xA9472337, 0x57C81EFE, 0x3E5E009F, 0x02CB03BB,
            0x2BA85674, 0xF21DC251, 0x78C34A34, 0xABB1F5BF, 0xB95A2FBD, 0x1FB47777, 0x9A96E8AC, 0x5D2D2838,
            0x55AAC92A, 0x99EE324E, 0x10F6214B, 0x58ABDFB1, 0x2008794D, 0xBEC880F0, 0xE75E5341, 0x88015C34,
            0x352D8FBF, 0x622B7F6C, 0xF5C59EA2, 0x1F759D8E, 0xADE56159, 0xCC7B4C25, 0x5B8BC48C, 0xB6BD15AF,
            0x3C5B5110, 0xE74A7C3D, 0xEE613161, 0x156A1C67, 0x72C06817, 0xEA0A6F69, 0x4CECF993, 0xCA9D554C,
            0x8E20361F, 0x42D396B9, 0x595DE578, 0x749D7955, 0xFD1BA5FD, 0x81FC160E, 0xDB97E28C, 0x7CF148F7,
            0x0B0B3CF5, 0x534DE605, 0x46421066, 0xD4B68DD1, 0x9E479CE6, 0xAE667A9D, 0xBC082082, 0xB06DD6EF,
            0x20F0F23F, 0xB99E1551, 0xF47A2E3A, 0x71DA50C6, 0x67B65779, 0x2A8CB376, 0x1EA71EEE, 0x29ABCD50,
            0xB6EB0C6B, 0x23C10511, 0x6F3F2144, 0x6AF23012, 0xF696BD9E, 0xB94099D8, 0xAD5A9C81, 0x7A0794FA,
            0x7EDF59D6, 0x1E72E574, 0x8561913C, 0x4E4D568F, 0xEECB9928, 0x9C124D2E, 0x0848B82C, 0xF1CA395F,
            0x9DAF43DC, 0xF77EC323, 0x394E9B59, 0x7E200946, 0x8B811D68, 0x16DA3305, 0xAB8DE2C3, 0xE6C53B64,
            0x98C2D321, 0x88A97D81, 0xA7106419, 0x8E52F7BF, 0x8ED262AF, 0x7CCA974E, 0xF0933241, 0x040DD437,
            0xE143B3D4, 0x3019F56F, 0xB741521D, 0xF1745362, 0x4C435F9F, 0xB4214D0D, 0x0B0C348B, 0x5051D189,
            0x4C30447E, 0x7393D722, 0x95CEDD0B, 0xDD994E80, 0xC3D22ED9, 0x739CD900, 0x131EB9C4, 0xEF1062B2,
            0x4F0DE436, 0x52920073, 0x9A7F3D80, 0x896E7B1B, 0x2C8BBE5A, 0xBD304F8A, 0xA993E22C, 0x134C41A0,
            0xFA989E00, 0x39CE9726, 0xFB89FCCF, 0xE8FBAC97, 0xD4063FFC, 0x935A2B5A, 0x44C8EE83, 0xCB2BC7B6,
            0x02989E92, 0x75478BEA, 0x144378D0, 0xD853C087, 0x8897A34E, 0xDD23629D, 0xBDE2A2A2, 0x581D8ECC,
            0x5DA8AEE8, 0xFF8AAFD0, 0xBA2BCF6E, 0x4BD98DAC, 0xF2EDB9E4, 0xFA2DC868, 0x47E84661, 0xECEB1C7D,
            0x41705CA4, 0x5982E4D4, 0xEB5204A1, 0xD196CAFB, 0x6414804D, 0x3ABD4B46, 0x8B494C26, 0xB432D52B,
            0x39C5356B, 0x6EC80BF7, 0x71BE5483, 0xCEC4A509, 0xE9411D61, 0x52F341E5, 0xD2E6197B, 0x4F02826C,
            0xA9E48838, 0xD1F8F247, 0xE4957FB3, 0x586CCA99, 0x9A8B6A5B, 0x4998FBEA, 0xF762BE4C, 0x90DFE33C,
            0x9731511E, 0x88C6A82F, 0xDD65A4D4 };

    public static int Hash32(byte[] v, int iStart, int iLength) {
        int u = 0x326F637B;

        if (v == null) {
            assert false;
            return u;
        }
        if (iStart < 0) {
            assert false;
            return u;
        }
        if (iLength < 0) {
            assert false;
            return u;
        }

        int m = iStart + iLength;
        if (m > v.length) {
            assert false;
            return u;
        }

        for (int i = iStart; i < m; ++i) {
            u ^= m_vSBox[bint(v[i])];
            u *= 3;
        }

        return u;
    }

    public static int bint(byte b) {
        return b & 0xff;
    }
}

Related

1. hash(Object[] state)
2. hash1(int val)
3. hash1(Object a)
4. hash16(int hash)
5. hash3(int hash, Object x, Object y, Object z)
6. hash32shiftmult(int k)
7. hash64(final byte[] data, int length)
8. hash64To32(long lg)
9. hash64to32(long v)