com.mindbright.util
Class CRC32

java.lang.Object
  com.mindbright.util.CRC32

public final class CRC32
extends java.lang.Object

static routine for calculating CRC32 (Cyclic Redundancy Check) checksums on data. Note that CRC32 is not cryptographically secure. A better alternative is SHA1 or MD5.

See Also:

MD5, SHA1

Field Summary

static long[]

crc32_tab Table used to calculate CR32 checksums

Constructor Summary

CRC32()

Method Summary

static long

getValue(byte[] buf, int off, int len) Calculate the CR32 value for a given blob of data

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

crc32_tab

public static final long[] crc32_tab

Table used to calculate CR32 checksums

Constructor Detail

CRC32

public CRC32()

Method Detail

getValue

public static long getValue(byte[] buf,
                            int off,
                            int len)

Calculate the CR32 value for a given blob of data

Parameters:

buf - array holding data to calculate checksum for

off - offset of data in buf

len - length of adata

Returns:

the CRC32 checksum