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cryptix.openpgp.util
Class PGPCRC  

java.lang.Object
  cryptix.openpgp.util.PGPCRC

All Implemented Interfaces:

java.util.zip.Checksum

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public final class PGPCRC

extends java.lang.Object

implements java.util.zip.Checksum

CRC checksum as required by OpenPGP base64 encoded packets.

Version:

$Revision: 1.2 $

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Field Summary
private  int	accum           Running CRC
private static int	ACCUM_INIT           Initial accumulator value
private static int[]	crctable

 

Constructor Summary

PGPCRC()           Construct a virgin PGPCRC

 

Method Summary
static int	checksum(byte[] buf)           Convenience method to calculate PGP CRC over a given buffer.
private static int	checksum(int accum, byte[] buf)           Update the given CRC with the data in the given buffer.
long	getValue()           Returns the current value of the CRC.
void	reset()           Resets the data checksum as if no update was ever called.
void	update(byte[] buf)           Update the CRC with the contents of the buffer.
void	update(byte[] buf, int off, int len)           Update the CRC with the contents of the buffer.
void	update(int b)           Update CRC with given byte.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

crctable

private static final int[] crctable

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ACCUM_INIT

private static final int ACCUM_INIT

Initial accumulator value

See Also:

Constant Field Values

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accum

private int accum

Running CRC

Constructor Detail

PGPCRC

public PGPCRC()

Construct a virgin PGPCRC

Method Detail

checksum

public static int checksum(byte[] buf)

Convenience method to calculate PGP CRC over a given buffer.

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update

public final void update(byte[] buf)

Update the CRC with the contents of the buffer.

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update

public final void update(byte[] buf,
                         int off,
                         int len)

Update the CRC with the contents of the buffer.

Specified by:

update in interface java.util.zip.Checksum

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update

public final void update(int b)

Update CRC with given byte.

Specified by:

update in interface java.util.zip.Checksum

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getValue

public final long getValue()

Returns the current value of the CRC.

Specified by:

getValue in interface java.util.zip.Checksum

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reset

public void reset()

Description copied from interface: java.util.zip.Checksum

Resets the data checksum as if no update was ever called.

Specified by:

reset in interface java.util.zip.Checksum

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checksum

private static int checksum(int accum,
                            byte[] buf)

Update the given CRC with the data in the given buffer.

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