Package generic.hash

Class FNV1a32MessageDigest

java.lang.Object

generic.hash.AbstractMessageDigest

generic.hash.FNV1a32MessageDigest

All Implemented Interfaces:

MessageDigest

public class FNV1a32MessageDigest
extends AbstractMessageDigest

Field Summary

Fields

Modifier and Type	Field	Description
static final int	FNV_32_OFFSET_BASIS
static final int	FNV_32_PRIME

Fields inherited from class generic.hash.AbstractMessageDigest

algorithm, digestLength

Constructor Summary

Constructors

Constructor	Description
FNV1a32MessageDigest()
FNV1a32MessageDigest(int initialVector)

Method Summary

Modifier and Type	Method	Description
int	digest(byte[] buf, int offset, int len)	Completes the hash computation by performing final operations such as padding.
long	digestLong()	Completes the hash computation by performing final operations such as padding, and returns (up to) the first 8 bytes as a big-endian long value.
void	reset()	Resets the digest for further use.
void	update(byte input)	Updates the digest using the specified byte.
void	update(byte[] input, int offset, int len)	You REALLY want to override this method.
void	update(byte[] input, int offset, int len, TaskMonitor monitor)	You REALLY want to override this method too.

Methods inherited from class generic.hash.AbstractMessageDigest

digest, getAlgorithm, getDigestLength, update, update, update, update, update

Methods inherited from class java.lang.Object

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

Field Details

FNV_32_OFFSET_BASIS

public static final int FNV_32_OFFSET_BASIS

See Also:

• Constant Field Values

FNV_32_PRIME

public static final int FNV_32_PRIME

See Also:

• Constant Field Values

Constructor Details

FNV1a32MessageDigest

public FNV1a32MessageDigest(int initialVector)

FNV1a32MessageDigest

public FNV1a32MessageDigest()

Method Details

update

public void update(byte[] input,
 int offset,
 int len)

Description copied from class: AbstractMessageDigest

You REALLY want to override this method.

Specified by:

update in interface MessageDigest

Overrides:

update in class AbstractMessageDigest

Parameters:

input - the array of bytes

offset - the offset to start from in the array of bytes

len - the number of bytes to use, starting at offset

update

public void update(byte[] input,
 int offset,
 int len,
 TaskMonitor monitor)

Description copied from class: AbstractMessageDigest

You REALLY want to override this method too.

Specified by:

update in interface MessageDigest

Overrides:

update in class AbstractMessageDigest

Parameters:

input - the array of bytes

offset - the offset to start from in the array of bytes

len - the number of bytes to use, starting at offset

monitor - the monitor to check during loops

update

public void update(byte input)

Description copied from interface: MessageDigest

Updates the digest using the specified byte.

Parameters:

input - the byte with which to update the digest

digest

public int digest(byte[] buf,
 int offset,
 int len)

Description copied from interface: MessageDigest

Completes the hash computation by performing final operations such as padding. The digest is reset after this call is made.

Parameters:

buf - output buffer for the computed digest

offset - offset into the output buffer to begin storing the digest

len - number of bytes within buf allocated for the digest

Returns:

the number of bytes placed into buf

digestLong

public long digestLong()

Description copied from interface: MessageDigest

Completes the hash computation by performing final operations such as padding, and returns (up to) the first 8 bytes as a big-endian long value. The digest is reset after this call is made.

Returns:

the digest value as a long value

reset

public void reset()

Description copied from interface: MessageDigest

Resets the digest for further use.