senselogic.sitevision.api.security

Interface MessageDigester

public interface MessageDigester

Message digester that performs hash computation using a specific algorithm.

Message digests are secure one-way hash functions that take arbitrary-sized data and output a fixed-length hash value. Implementations of this interface is typically backed by a java.security.MessageDigest instance for given algorithm.

An instance of the Sitevision class implementing this interface for a specific algorithm can be obtained via MessageDigesterFactory.

Since:

Sitevision 5.0.1

Author:

Magnus Lövgren

See Also:

MessageDigesterFactory

Method Summary

Modifier and Type	Method and Description
byte[]	digest() Executes the hash computation.
String	getAlgorithm() Returns a string that identifies the algorithm.
void	updateByte(byte aByte) Updates the digest with a byte.
void	updateBytes(byte[] aBytes) Updates the digest with an array of bytes.

Method Detail

updateByte

void updateByte(byte aByte)

Updates the digest with a byte.

Parameters:

aByte - the byte.

updateBytes

void updateBytes(byte[] aBytes)

Updates the digest with an array of bytes.

Parameters:

aBytes - the array of bytes.

digest

byte[] digest()

Executes the hash computation. The digest is reset after this call is made.

Returns:

the array of bytes for the resulting hash value.

getAlgorithm

String getAlgorithm()

Returns a string that identifies the algorithm.

Returns:

the hash algorithm