Package lumis.portal.crypto

Class MessageDigestCipher

java.lang.Object

lumis.portal.crypto.AbstractCipher

lumis.portal.crypto.MessageDigestCipher

All Implemented Interfaces:

ICipher, ICipherSpi

public class MessageDigestCipher
extends AbstractCipher

Uses a MessageDigest algorithm to encrypt data.

In this cipher's configuration, the value of algorithm element is used to specify the MessageDigest algorithm; and the provider element may optionally be used to specify the MessageDigest provider.

Since:

5.5.0

Version:

$Revision: 11180 $ $Date: 2009-12-04 18:13:02 -0200 (Fri, 04 Dec 2009) $

See Also:

MessageDigest

Constructor Summary

Constructors

Constructor	Description
MessageDigestCipher()

Method Summary

Modifier and Type	Method	Description
protected MessageDigest	createMessageDigest()	Returns a new MessageDigest instance based on this cipher's getAlgorithm() and getProvider().
byte[]	decrypt(byte[] value)	Decrypts an array of bytes.
byte[]	encrypt(byte[] value)	Encrypts an array of bytes.
protected String	getAlgorithm()	Returns the message digest algorithm to be used.
protected String	getProvider()	Returns the message digest provider to be used.
protected boolean	getUseURLSafeBase64Variant()	Indicates if a URL safe Base64 variant is to be used when encoding bytes to String.
void	init(Node configuration)	This method is called only once and before any other method are called.
protected void	setAlgorithm(String algorithm)	Sets the message digest algorithm to be used.
protected void	setProvider(String provider)	Sets the message digest provider to be used.

Methods inherited from class lumis.portal.crypto.AbstractCipher

decrypt, encrypt, getStringCharset

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDigestCipher

public MessageDigestCipher()

Method Detail

getUseURLSafeBase64Variant

protected boolean getUseURLSafeBase64Variant()

Description copied from class: AbstractCipher

Indicates if a URL safe Base64 variant is to be used when encoding bytes to String.

The default value is true. This method may be overridden to change it.

Overrides:

getUseURLSafeBase64Variant in class AbstractCipher

Returns:

true if a URL safe variant is to be used, false if the standard Base64 is to be used.

getAlgorithm

protected String getAlgorithm()

Returns the message digest algorithm to be used.

Returns:

the algorithm.

Since:

5.5.0

setAlgorithm

protected void setAlgorithm(String algorithm)

Sets the message digest algorithm to be used.

Parameters:

algorithm - the algorithm.

Since:

5.5.0

getProvider

protected String getProvider()

Returns the message digest provider to be used.

Returns:

the provider, or null if the default provider search is to be used.

Since:

5.5.0

setProvider

protected void setProvider(String provider)

Sets the message digest provider to be used.

Parameters:

provider - the provider, or null if the default provider search is to be used.

Since:

5.5.0

init

public void init(Node configuration)
          throws PortalException

Description copied from interface: ICipherSpi

This method is called only once and before any other method are called. This allows the cipher to initialize itself and read any custom configuration.

Throws:

PortalException

createMessageDigest

protected MessageDigest createMessageDigest()

Returns a new MessageDigest instance based on this cipher's getAlgorithm() and getProvider().

Returns:

the message digest.

Since:

5.5.0

See Also:

MessageDigest.getInstance(String, String)

encrypt

public byte[] encrypt(byte[] value)

Description copied from interface: ICipher

Encrypts an array of bytes.

Parameters:

value - the original value.

Returns:

the encrypted value.

decrypt

public byte[] decrypt(byte[] value)

Description copied from interface: ICipher

Decrypts an array of bytes.

Parameters:

value - the encrypted value.

Returns:

the value decrypted.