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The Bouncy Castle Java APIs for the OpenPGP Protocol. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Keiron Liddle, Aftex Software
* to whom the Ant project is very grateful for his
* great code.
*/
package org.bouncycastle.apache.bzip2;
import org.bouncycastle.util.Integers;
/**
* A simple class the hold and calculate the CRC for sanity checking
* of the data.
*
* @author Keiron Liddle
*/
class CRC
{
// Values are byte-reversed
private static final int[] CRC32_TABLE = {
0x00000000, 0xB71DC104, 0x6E3B8209, 0xD926430D,
0xDC760413, 0x6B6BC517, 0xB24D861A, 0x0550471E,
0xB8ED0826, 0x0FF0C922, 0xD6D68A2F, 0x61CB4B2B,
0x649B0C35, 0xD386CD31, 0x0AA08E3C, 0xBDBD4F38,
0x70DB114C, 0xC7C6D048, 0x1EE09345, 0xA9FD5241,
0xACAD155F, 0x1BB0D45B, 0xC2969756, 0x758B5652,
0xC836196A, 0x7F2BD86E, 0xA60D9B63, 0x11105A67,
0x14401D79, 0xA35DDC7D, 0x7A7B9F70, 0xCD665E74,
0xE0B62398, 0x57ABE29C, 0x8E8DA191, 0x39906095,
0x3CC0278B, 0x8BDDE68F, 0x52FBA582, 0xE5E66486,
0x585B2BBE, 0xEF46EABA, 0x3660A9B7, 0x817D68B3,
0x842D2FAD, 0x3330EEA9, 0xEA16ADA4, 0x5D0B6CA0,
0x906D32D4, 0x2770F3D0, 0xFE56B0DD, 0x494B71D9,
0x4C1B36C7, 0xFB06F7C3, 0x2220B4CE, 0x953D75CA,
0x28803AF2, 0x9F9DFBF6, 0x46BBB8FB, 0xF1A679FF,
0xF4F63EE1, 0x43EBFFE5, 0x9ACDBCE8, 0x2DD07DEC,
0x77708634, 0xC06D4730, 0x194B043D, 0xAE56C539,
0xAB068227, 0x1C1B4323, 0xC53D002E, 0x7220C12A,
0xCF9D8E12, 0x78804F16, 0xA1A60C1B, 0x16BBCD1F,
0x13EB8A01, 0xA4F64B05, 0x7DD00808, 0xCACDC90C,
0x07AB9778, 0xB0B6567C, 0x69901571, 0xDE8DD475,
0xDBDD936B, 0x6CC0526F, 0xB5E61162, 0x02FBD066,
0xBF469F5E, 0x085B5E5A, 0xD17D1D57, 0x6660DC53,
0x63309B4D, 0xD42D5A49, 0x0D0B1944, 0xBA16D840,
0x97C6A5AC, 0x20DB64A8, 0xF9FD27A5, 0x4EE0E6A1,
0x4BB0A1BF, 0xFCAD60BB, 0x258B23B6, 0x9296E2B2,
0x2F2BAD8A, 0x98366C8E, 0x41102F83, 0xF60DEE87,
0xF35DA999, 0x4440689D, 0x9D662B90, 0x2A7BEA94,
0xE71DB4E0, 0x500075E4, 0x892636E9, 0x3E3BF7ED,
0x3B6BB0F3, 0x8C7671F7, 0x555032FA, 0xE24DF3FE,
0x5FF0BCC6, 0xE8ED7DC2, 0x31CB3ECF, 0x86D6FFCB,
0x8386B8D5, 0x349B79D1, 0xEDBD3ADC, 0x5AA0FBD8,
0xEEE00C69, 0x59FDCD6D, 0x80DB8E60, 0x37C64F64,
0x3296087A, 0x858BC97E, 0x5CAD8A73, 0xEBB04B77,
0x560D044F, 0xE110C54B, 0x38368646, 0x8F2B4742,
0x8A7B005C, 0x3D66C158, 0xE4408255, 0x535D4351,
0x9E3B1D25, 0x2926DC21, 0xF0009F2C, 0x471D5E28,
0x424D1936, 0xF550D832, 0x2C769B3F, 0x9B6B5A3B,
0x26D61503, 0x91CBD407, 0x48ED970A, 0xFFF0560E,
0xFAA01110, 0x4DBDD014, 0x949B9319, 0x2386521D,
0x0E562FF1, 0xB94BEEF5, 0x606DADF8, 0xD7706CFC,
0xD2202BE2, 0x653DEAE6, 0xBC1BA9EB, 0x0B0668EF,
0xB6BB27D7, 0x01A6E6D3, 0xD880A5DE, 0x6F9D64DA,
0x6ACD23C4, 0xDDD0E2C0, 0x04F6A1CD, 0xB3EB60C9,
0x7E8D3EBD, 0xC990FFB9, 0x10B6BCB4, 0xA7AB7DB0,
0xA2FB3AAE, 0x15E6FBAA, 0xCCC0B8A7, 0x7BDD79A3,
0xC660369B, 0x717DF79F, 0xA85BB492, 0x1F467596,
0x1A163288, 0xAD0BF38C, 0x742DB081, 0xC3307185,
0x99908A5D, 0x2E8D4B59, 0xF7AB0854, 0x40B6C950,
0x45E68E4E, 0xF2FB4F4A, 0x2BDD0C47, 0x9CC0CD43,
0x217D827B, 0x9660437F, 0x4F460072, 0xF85BC176,
0xFD0B8668, 0x4A16476C, 0x93300461, 0x242DC565,
0xE94B9B11, 0x5E565A15, 0x87701918, 0x306DD81C,
0x353D9F02, 0x82205E06, 0x5B061D0B, 0xEC1BDC0F,
0x51A69337, 0xE6BB5233, 0x3F9D113E, 0x8880D03A,
0x8DD09724, 0x3ACD5620, 0xE3EB152D, 0x54F6D429,
0x7926A9C5, 0xCE3B68C1, 0x171D2BCC, 0xA000EAC8,
0xA550ADD6, 0x124D6CD2, 0xCB6B2FDF, 0x7C76EEDB,
0xC1CBA1E3, 0x76D660E7, 0xAFF023EA, 0x18EDE2EE,
0x1DBDA5F0, 0xAAA064F4, 0x738627F9, 0xC49BE6FD,
0x09FDB889, 0xBEE0798D, 0x67C63A80, 0xD0DBFB84,
0xD58BBC9A, 0x62967D9E, 0xBBB03E93, 0x0CADFF97,
0xB110B0AF, 0x060D71AB, 0xDF2B32A6, 0x6836F3A2,
0x6D66B4BC, 0xDA7B75B8, 0x035D36B5, 0xB440F7B1,
};
private int value = 0;
void initialise()
{
value = 0xFFFFFFFF;
}
int getFinal()
{
return ~Integers.reverseBytes(value);
}
void update(int inCh)
{
value = (value >>> 8) ^ CRC32_TABLE[(value ^ inCh) & 0xFF];
}
void updateRun(int inCh, int runLength)
{
// assert runLength >= 4;
int inCh2 = inCh << 8 | inCh;
int inCh4 = inCh2 << 16 | inCh2;
do
{
value ^= inCh4;
value = (value >>> 8) ^ CRC32_TABLE[value & 0xFF];
value = (value >>> 8) ^ CRC32_TABLE[value & 0xFF];
value = (value >>> 8) ^ CRC32_TABLE[value & 0xFF];
value = (value >>> 8) ^ CRC32_TABLE[value & 0xFF];
}
while ((runLength -= 4) >= 4);
switch (runLength & 3)
{
case 0:
break;
case 1:
update(inCh);
break;
case 2:
update(inCh);
update(inCh);
break;
case 3:
update(inCh);
update(inCh);
update(inCh);
break;
}
}
}