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524 lines
19 KiB
524 lines
19 KiB
//
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// This DES class has been extracted from package Acme.Crypto for use in VNC.
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// The bytebit[] array has been reversed so that the most significant bit
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// in each byte of the key is ignored, not the least significant. Also the
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// unnecessary odd parity code has been removed.
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//
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// These changes are:
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// Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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//
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// This software is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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//
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// DesCipher - the DES encryption method
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//
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// The meat of this code is by Dave Zimmerman <dzimm@widget.com>, and is:
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//
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// Copyright (c) 1996 Widget Workshop, Inc. All Rights Reserved.
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//
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// Permission to use, copy, modify, and distribute this software
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// and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
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// without fee is hereby granted, provided that this copyright notice is kept
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// intact.
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//
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// WIDGET WORKSHOP MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
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// OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE, OR NON-INFRINGEMENT. WIDGET WORKSHOP SHALL NOT BE LIABLE
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// FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
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// DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
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//
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// THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
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// CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
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// PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
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// NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
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// SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
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// SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
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// PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). WIDGET WORKSHOP
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// SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
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// HIGH RISK ACTIVITIES.
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//
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//
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// The rest is:
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//
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// Copyright (C) 1996 by Jef Poskanzer <jef@acme.com>. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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// SUCH DAMAGE.
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//
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// Visit the ACME Labs Java page for up-to-date versions of this and other
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// fine Java utilities: http://www.acme.com/java/
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//import java.io.*;
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/// The DES encryption method.
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// <P>
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// This is surprisingly fast, for pure Java. On a SPARC 20, wrapped
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// in Acme.Crypto.EncryptedOutputStream or Acme.Crypto.EncryptedInputStream,
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// it does around 7000 bytes/second.
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// <P>
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// Most of this code is by Dave Zimmerman <dzimm@widget.com>, and is
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// Copyright (c) 1996 Widget Workshop, Inc. See the source file for details.
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// <P>
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// <A HREF="/resources/classes/Acme/Crypto/DesCipher.java">Fetch the software.</A><BR>
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// <A HREF="/resources/classes/Acme.tar.Z">Fetch the entire Acme package.</A>
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// <P>
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// @see Des3Cipher
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// @see EncryptedOutputStream
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// @see EncryptedInputStream
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public class DesCipher
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{
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// Constructor, byte-array key.
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public DesCipher( byte[] key )
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{
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setKey( key );
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}
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// Key routines.
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private int[] encryptKeys = new int[32];
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private int[] decryptKeys = new int[32];
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/// Set the key.
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public void setKey( byte[] key )
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{
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deskey( key, true, encryptKeys );
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deskey( key, false, decryptKeys );
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}
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// Turn an 8-byte key into internal keys.
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private void deskey( byte[] keyBlock, boolean encrypting, int[] KnL )
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{
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int i, j, l, m, n;
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int[] pc1m = new int[56];
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int[] pcr = new int[56];
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int[] kn = new int[32];
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for ( j = 0; j < 56; ++j )
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{
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l = pc1[j];
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m = l & 07;
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pc1m[j] = ( (keyBlock[l >>> 3] & bytebit[m]) != 0 )? 1: 0;
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}
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for ( i = 0; i < 16; ++i )
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{
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if ( encrypting )
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m = i << 1;
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else
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m = (15-i) << 1;
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n = m+1;
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kn[m] = kn[n] = 0;
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for ( j = 0; j < 28; ++j )
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{
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l = j+totrot[i];
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if ( l < 28 )
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pcr[j] = pc1m[l];
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else
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pcr[j] = pc1m[l-28];
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}
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for ( j=28; j < 56; ++j )
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{
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l = j+totrot[i];
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if ( l < 56 )
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pcr[j] = pc1m[l];
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else
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pcr[j] = pc1m[l-28];
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}
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for ( j = 0; j < 24; ++j )
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{
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if ( pcr[pc2[j]] != 0 )
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kn[m] |= bigbyte[j];
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if ( pcr[pc2[j+24]] != 0 )
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kn[n] |= bigbyte[j];
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}
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}
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cookey( kn, KnL );
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}
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private void cookey( int[] raw, int KnL[] )
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{
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int raw0, raw1;
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int rawi, KnLi;
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int i;
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for ( i = 0, rawi = 0, KnLi = 0; i < 16; ++i )
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{
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raw0 = raw[rawi++];
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raw1 = raw[rawi++];
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KnL[KnLi] = (raw0 & 0x00fc0000) << 6;
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KnL[KnLi] |= (raw0 & 0x00000fc0) << 10;
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KnL[KnLi] |= (raw1 & 0x00fc0000) >>> 10;
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KnL[KnLi] |= (raw1 & 0x00000fc0) >>> 6;
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++KnLi;
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KnL[KnLi] = (raw0 & 0x0003f000) << 12;
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KnL[KnLi] |= (raw0 & 0x0000003f) << 16;
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KnL[KnLi] |= (raw1 & 0x0003f000) >>> 4;
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KnL[KnLi] |= (raw1 & 0x0000003f);
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++KnLi;
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}
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}
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// Block encryption routines.
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private int[] tempInts = new int[2];
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/// Encrypt a block of eight bytes.
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public void encrypt( byte[] clearText, int clearOff, byte[] cipherText, int cipherOff )
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{
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squashBytesToInts( clearText, clearOff, tempInts, 0, 2 );
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des( tempInts, tempInts, encryptKeys );
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spreadIntsToBytes( tempInts, 0, cipherText, cipherOff, 2 );
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}
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/// Decrypt a block of eight bytes.
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public void decrypt( byte[] cipherText, int cipherOff, byte[] clearText, int clearOff )
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{
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squashBytesToInts( cipherText, cipherOff, tempInts, 0, 2 );
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des( tempInts, tempInts, decryptKeys );
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spreadIntsToBytes( tempInts, 0, clearText, clearOff, 2 );
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}
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// Encrypt a text which is a multiple of 8 bytes.
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public void encryptText( byte[] clearText, byte[] cipherText, byte[] key) {
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int i, j;
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for (i = 0; i< 8; i++)
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clearText[i] ^= key[i];
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encrypt(clearText, 0, cipherText, 0);
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for (i = 8; i < clearText.length; i += 8) {
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for (j = 0; j < 8; j++)
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clearText[i + j] ^= cipherText[i + j - 8];
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encrypt(clearText, i, cipherText, i);
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}
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}
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// Decrypt a text which is a multiple of 8 bytes.
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public void decryptText( byte[] cipherText, byte[] clearText, byte[] key) {
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int i, j;
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for (i = cipherText.length - 8; i > 0; i -= 8) {
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decrypt(cipherText, i, clearText, i);
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for (j = 0; j < 8; j++)
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clearText[i + j] ^= cipherText[i + j - 8];
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}
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/* i = 0 */
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decrypt(cipherText, 0, clearText, 0);
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for (i = 0; i < 8; i++)
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clearText[i] ^= key[i];
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}
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// The DES function.
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private void des( int[] inInts, int[] outInts, int[] keys )
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{
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int fval, work, right, leftt;
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int round;
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int keysi = 0;
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leftt = inInts[0];
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right = inInts[1];
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work = ((leftt >>> 4) ^ right) & 0x0f0f0f0f;
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right ^= work;
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leftt ^= (work << 4);
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work = ((leftt >>> 16) ^ right) & 0x0000ffff;
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right ^= work;
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leftt ^= (work << 16);
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work = ((right >>> 2) ^ leftt) & 0x33333333;
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leftt ^= work;
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right ^= (work << 2);
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work = ((right >>> 8) ^ leftt) & 0x00ff00ff;
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leftt ^= work;
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right ^= (work << 8);
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right = (right << 1) | ((right >>> 31) & 1);
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work = (leftt ^ right) & 0xaaaaaaaa;
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leftt ^= work;
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right ^= work;
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leftt = (leftt << 1) | ((leftt >>> 31) & 1);
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for ( round = 0; round < 8; ++round )
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{
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work = (right << 28) | (right >>> 4);
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work ^= keys[keysi++];
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fval = SP7[ work & 0x0000003f ];
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fval |= SP5[(work >>> 8) & 0x0000003f ];
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fval |= SP3[(work >>> 16) & 0x0000003f ];
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fval |= SP1[(work >>> 24) & 0x0000003f ];
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work = right ^ keys[keysi++];
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fval |= SP8[ work & 0x0000003f ];
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fval |= SP6[(work >>> 8) & 0x0000003f ];
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fval |= SP4[(work >>> 16) & 0x0000003f ];
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fval |= SP2[(work >>> 24) & 0x0000003f ];
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leftt ^= fval;
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work = (leftt << 28) | (leftt >>> 4);
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work ^= keys[keysi++];
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fval = SP7[ work & 0x0000003f ];
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fval |= SP5[(work >>> 8) & 0x0000003f ];
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fval |= SP3[(work >>> 16) & 0x0000003f ];
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fval |= SP1[(work >>> 24) & 0x0000003f ];
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work = leftt ^ keys[keysi++];
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fval |= SP8[ work & 0x0000003f ];
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fval |= SP6[(work >>> 8) & 0x0000003f ];
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fval |= SP4[(work >>> 16) & 0x0000003f ];
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fval |= SP2[(work >>> 24) & 0x0000003f ];
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right ^= fval;
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}
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right = (right << 31) | (right >>> 1);
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work = (leftt ^ right) & 0xaaaaaaaa;
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leftt ^= work;
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right ^= work;
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leftt = (leftt << 31) | (leftt >>> 1);
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work = ((leftt >>> 8) ^ right) & 0x00ff00ff;
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right ^= work;
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leftt ^= (work << 8);
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work = ((leftt >>> 2) ^ right) & 0x33333333;
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right ^= work;
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leftt ^= (work << 2);
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work = ((right >>> 16) ^ leftt) & 0x0000ffff;
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leftt ^= work;
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right ^= (work << 16);
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work = ((right >>> 4) ^ leftt) & 0x0f0f0f0f;
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leftt ^= work;
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right ^= (work << 4);
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outInts[0] = right;
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outInts[1] = leftt;
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}
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// Tables, permutations, S-boxes, etc.
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private static byte[] bytebit = {
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(byte)0x01, (byte)0x02, (byte)0x04, (byte)0x08,
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(byte)0x10, (byte)0x20, (byte)0x40, (byte)0x80
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};
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private static int[] bigbyte = {
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0x800000, 0x400000, 0x200000, 0x100000,
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0x080000, 0x040000, 0x020000, 0x010000,
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0x008000, 0x004000, 0x002000, 0x001000,
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0x000800, 0x000400, 0x000200, 0x000100,
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0x000080, 0x000040, 0x000020, 0x000010,
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0x000008, 0x000004, 0x000002, 0x000001
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};
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private static byte[] pc1 = {
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(byte)56, (byte)48, (byte)40, (byte)32, (byte)24, (byte)16, (byte) 8,
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(byte) 0, (byte)57, (byte)49, (byte)41, (byte)33, (byte)25, (byte)17,
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(byte) 9, (byte) 1, (byte)58, (byte)50, (byte)42, (byte)34, (byte)26,
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(byte)18, (byte)10, (byte) 2, (byte)59, (byte)51, (byte)43, (byte)35,
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(byte)62, (byte)54, (byte)46, (byte)38, (byte)30, (byte)22, (byte)14,
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(byte) 6, (byte)61, (byte)53, (byte)45, (byte)37, (byte)29, (byte)21,
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(byte)13, (byte) 5, (byte)60, (byte)52, (byte)44, (byte)36, (byte)28,
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(byte)20, (byte)12, (byte) 4, (byte)27, (byte)19, (byte)11, (byte)3
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};
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private static int[] totrot = {
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1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28
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};
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private static byte[] pc2 = {
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(byte)13, (byte)16, (byte)10, (byte)23, (byte) 0, (byte) 4,
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(byte) 2, (byte)27, (byte)14, (byte) 5, (byte)20, (byte) 9,
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(byte)22, (byte)18, (byte)11, (byte)3 , (byte)25, (byte) 7,
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(byte)15, (byte) 6, (byte)26, (byte)19, (byte)12, (byte) 1,
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(byte)40, (byte)51, (byte)30, (byte)36, (byte)46, (byte)54,
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(byte)29, (byte)39, (byte)50, (byte)44, (byte)32, (byte)47,
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(byte)43, (byte)48, (byte)38, (byte)55, (byte)33, (byte)52,
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(byte)45, (byte)41, (byte)49, (byte)35, (byte)28, (byte)31,
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};
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private static int[] SP1 = {
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0x01010400, 0x00000000, 0x00010000, 0x01010404,
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0x01010004, 0x00010404, 0x00000004, 0x00010000,
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0x00000400, 0x01010400, 0x01010404, 0x00000400,
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0x01000404, 0x01010004, 0x01000000, 0x00000004,
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0x00000404, 0x01000400, 0x01000400, 0x00010400,
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0x00010400, 0x01010000, 0x01010000, 0x01000404,
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0x00010004, 0x01000004, 0x01000004, 0x00010004,
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0x00000000, 0x00000404, 0x00010404, 0x01000000,
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0x00010000, 0x01010404, 0x00000004, 0x01010000,
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0x01010400, 0x01000000, 0x01000000, 0x00000400,
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0x01010004, 0x00010000, 0x00010400, 0x01000004,
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0x00000400, 0x00000004, 0x01000404, 0x00010404,
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0x01010404, 0x00010004, 0x01010000, 0x01000404,
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0x01000004, 0x00000404, 0x00010404, 0x01010400,
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0x00000404, 0x01000400, 0x01000400, 0x00000000,
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0x00010004, 0x00010400, 0x00000000, 0x01010004
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};
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private static int[] SP2 = {
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0x80108020, 0x80008000, 0x00008000, 0x00108020,
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0x00100000, 0x00000020, 0x80100020, 0x80008020,
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0x80000020, 0x80108020, 0x80108000, 0x80000000,
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0x80008000, 0x00100000, 0x00000020, 0x80100020,
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0x00108000, 0x00100020, 0x80008020, 0x00000000,
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0x80000000, 0x00008000, 0x00108020, 0x80100000,
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0x00100020, 0x80000020, 0x00000000, 0x00108000,
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0x00008020, 0x80108000, 0x80100000, 0x00008020,
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0x00000000, 0x00108020, 0x80100020, 0x00100000,
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0x80008020, 0x80100000, 0x80108000, 0x00008000,
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0x80100000, 0x80008000, 0x00000020, 0x80108020,
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0x00108020, 0x00000020, 0x00008000, 0x80000000,
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0x00008020, 0x80108000, 0x00100000, 0x80000020,
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0x00100020, 0x80008020, 0x80000020, 0x00100020,
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0x00108000, 0x00000000, 0x80008000, 0x00008020,
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0x80000000, 0x80100020, 0x80108020, 0x00108000
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};
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private static int[] SP3 = {
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0x00000208, 0x08020200, 0x00000000, 0x08020008,
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0x08000200, 0x00000000, 0x00020208, 0x08000200,
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0x00020008, 0x08000008, 0x08000008, 0x00020000,
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0x08020208, 0x00020008, 0x08020000, 0x00000208,
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0x08000000, 0x00000008, 0x08020200, 0x00000200,
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0x00020200, 0x08020000, 0x08020008, 0x00020208,
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0x08000208, 0x00020200, 0x00020000, 0x08000208,
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0x00000008, 0x08020208, 0x00000200, 0x08000000,
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0x08020200, 0x08000000, 0x00020008, 0x00000208,
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0x00020000, 0x08020200, 0x08000200, 0x00000000,
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0x00000200, 0x00020008, 0x08020208, 0x08000200,
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0x08000008, 0x00000200, 0x00000000, 0x08020008,
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0x08000208, 0x00020000, 0x08000000, 0x08020208,
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0x00000008, 0x00020208, 0x00020200, 0x08000008,
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0x08020000, 0x08000208, 0x00000208, 0x08020000,
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0x00020208, 0x00000008, 0x08020008, 0x00020200
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};
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private static int[] SP4 = {
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0x00802001, 0x00002081, 0x00002081, 0x00000080,
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0x00802080, 0x00800081, 0x00800001, 0x00002001,
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|
0x00000000, 0x00802000, 0x00802000, 0x00802081,
|
|
0x00000081, 0x00000000, 0x00800080, 0x00800001,
|
|
0x00000001, 0x00002000, 0x00800000, 0x00802001,
|
|
0x00000080, 0x00800000, 0x00002001, 0x00002080,
|
|
0x00800081, 0x00000001, 0x00002080, 0x00800080,
|
|
0x00002000, 0x00802080, 0x00802081, 0x00000081,
|
|
0x00800080, 0x00800001, 0x00802000, 0x00802081,
|
|
0x00000081, 0x00000000, 0x00000000, 0x00802000,
|
|
0x00002080, 0x00800080, 0x00800081, 0x00000001,
|
|
0x00802001, 0x00002081, 0x00002081, 0x00000080,
|
|
0x00802081, 0x00000081, 0x00000001, 0x00002000,
|
|
0x00800001, 0x00002001, 0x00802080, 0x00800081,
|
|
0x00002001, 0x00002080, 0x00800000, 0x00802001,
|
|
0x00000080, 0x00800000, 0x00002000, 0x00802080
|
|
};
|
|
private static int[] SP5 = {
|
|
0x00000100, 0x02080100, 0x02080000, 0x42000100,
|
|
0x00080000, 0x00000100, 0x40000000, 0x02080000,
|
|
0x40080100, 0x00080000, 0x02000100, 0x40080100,
|
|
0x42000100, 0x42080000, 0x00080100, 0x40000000,
|
|
0x02000000, 0x40080000, 0x40080000, 0x00000000,
|
|
0x40000100, 0x42080100, 0x42080100, 0x02000100,
|
|
0x42080000, 0x40000100, 0x00000000, 0x42000000,
|
|
0x02080100, 0x02000000, 0x42000000, 0x00080100,
|
|
0x00080000, 0x42000100, 0x00000100, 0x02000000,
|
|
0x40000000, 0x02080000, 0x42000100, 0x40080100,
|
|
0x02000100, 0x40000000, 0x42080000, 0x02080100,
|
|
0x40080100, 0x00000100, 0x02000000, 0x42080000,
|
|
0x42080100, 0x00080100, 0x42000000, 0x42080100,
|
|
0x02080000, 0x00000000, 0x40080000, 0x42000000,
|
|
0x00080100, 0x02000100, 0x40000100, 0x00080000,
|
|
0x00000000, 0x40080000, 0x02080100, 0x40000100
|
|
};
|
|
private static int[] SP6 = {
|
|
0x20000010, 0x20400000, 0x00004000, 0x20404010,
|
|
0x20400000, 0x00000010, 0x20404010, 0x00400000,
|
|
0x20004000, 0x00404010, 0x00400000, 0x20000010,
|
|
0x00400010, 0x20004000, 0x20000000, 0x00004010,
|
|
0x00000000, 0x00400010, 0x20004010, 0x00004000,
|
|
0x00404000, 0x20004010, 0x00000010, 0x20400010,
|
|
0x20400010, 0x00000000, 0x00404010, 0x20404000,
|
|
0x00004010, 0x00404000, 0x20404000, 0x20000000,
|
|
0x20004000, 0x00000010, 0x20400010, 0x00404000,
|
|
0x20404010, 0x00400000, 0x00004010, 0x20000010,
|
|
0x00400000, 0x20004000, 0x20000000, 0x00004010,
|
|
0x20000010, 0x20404010, 0x00404000, 0x20400000,
|
|
0x00404010, 0x20404000, 0x00000000, 0x20400010,
|
|
0x00000010, 0x00004000, 0x20400000, 0x00404010,
|
|
0x00004000, 0x00400010, 0x20004010, 0x00000000,
|
|
0x20404000, 0x20000000, 0x00400010, 0x20004010
|
|
};
|
|
private static int[] SP7 = {
|
|
0x00200000, 0x04200002, 0x04000802, 0x00000000,
|
|
0x00000800, 0x04000802, 0x00200802, 0x04200800,
|
|
0x04200802, 0x00200000, 0x00000000, 0x04000002,
|
|
0x00000002, 0x04000000, 0x04200002, 0x00000802,
|
|
0x04000800, 0x00200802, 0x00200002, 0x04000800,
|
|
0x04000002, 0x04200000, 0x04200800, 0x00200002,
|
|
0x04200000, 0x00000800, 0x00000802, 0x04200802,
|
|
0x00200800, 0x00000002, 0x04000000, 0x00200800,
|
|
0x04000000, 0x00200800, 0x00200000, 0x04000802,
|
|
0x04000802, 0x04200002, 0x04200002, 0x00000002,
|
|
0x00200002, 0x04000000, 0x04000800, 0x00200000,
|
|
0x04200800, 0x00000802, 0x00200802, 0x04200800,
|
|
0x00000802, 0x04000002, 0x04200802, 0x04200000,
|
|
0x00200800, 0x00000000, 0x00000002, 0x04200802,
|
|
0x00000000, 0x00200802, 0x04200000, 0x00000800,
|
|
0x04000002, 0x04000800, 0x00000800, 0x00200002
|
|
};
|
|
private static int[] SP8 = {
|
|
0x10001040, 0x00001000, 0x00040000, 0x10041040,
|
|
0x10000000, 0x10001040, 0x00000040, 0x10000000,
|
|
0x00040040, 0x10040000, 0x10041040, 0x00041000,
|
|
0x10041000, 0x00041040, 0x00001000, 0x00000040,
|
|
0x10040000, 0x10000040, 0x10001000, 0x00001040,
|
|
0x00041000, 0x00040040, 0x10040040, 0x10041000,
|
|
0x00001040, 0x00000000, 0x00000000, 0x10040040,
|
|
0x10000040, 0x10001000, 0x00041040, 0x00040000,
|
|
0x00041040, 0x00040000, 0x10041000, 0x00001000,
|
|
0x00000040, 0x10040040, 0x00001000, 0x00041040,
|
|
0x10001000, 0x00000040, 0x10000040, 0x10040000,
|
|
0x10040040, 0x10000000, 0x00040000, 0x10001040,
|
|
0x00000000, 0x10041040, 0x00040040, 0x10000040,
|
|
0x10040000, 0x10001000, 0x10001040, 0x00000000,
|
|
0x10041040, 0x00041000, 0x00041000, 0x00001040,
|
|
0x00001040, 0x00040040, 0x10000000, 0x10041000
|
|
};
|
|
|
|
// Routines taken from other parts of the Acme utilities.
|
|
|
|
/// Squash bytes down to ints.
|
|
public static void squashBytesToInts( byte[] inBytes, int inOff, int[] outInts, int outOff, int intLen )
|
|
{
|
|
for ( int i = 0; i < intLen; ++i )
|
|
outInts[outOff + i] =
|
|
( ( inBytes[inOff + i * 4 ] & 0xff ) << 24 ) |
|
|
( ( inBytes[inOff + i * 4 + 1] & 0xff ) << 16 ) |
|
|
( ( inBytes[inOff + i * 4 + 2] & 0xff ) << 8 ) |
|
|
( inBytes[inOff + i * 4 + 3] & 0xff );
|
|
}
|
|
|
|
/// Spread ints into bytes.
|
|
public static void spreadIntsToBytes( int[] inInts, int inOff, byte[] outBytes, int outOff, int intLen )
|
|
{
|
|
for ( int i = 0; i < intLen; ++i )
|
|
{
|
|
outBytes[outOff + i * 4 ] = (byte) ( inInts[inOff + i] >>> 24 );
|
|
outBytes[outOff + i * 4 + 1] = (byte) ( inInts[inOff + i] >>> 16 );
|
|
outBytes[outOff + i * 4 + 2] = (byte) ( inInts[inOff + i] >>> 8 );
|
|
outBytes[outOff + i * 4 + 3] = (byte) inInts[inOff + i];
|
|
}
|
|
}
|
|
}
|
|
|