org.eclipse.emf.ecore.resource.impl

Class AESCipherImpl

java.lang.Object

org.eclipse.emf.ecore.resource.impl.AESCipherImpl

All Implemented Interfaces:

URIConverter.Cipher

public class AESCipherImpl
extends java.lang.Object
implements URIConverter.Cipher

EMF implementation for the URIConverter.Cipher interface using the AES encryption algorithm.

This shows how this class can be used:

 Map options = new HashMap();
 options.put(Resource.OPTION_CIPHER, 
             new AESCipherImpl("12345")); // "That's amazing! I've got the same combination on my luggage!"
 resource.save(options);
 resource.load(options);
 

Constructor Summary

Constructors

Constructor and Description
AESCipherImpl(java.lang.String password)

Method Summary

Methods

Modifier and Type	Method and Description
java.io.InputStream	decrypt(java.io.InputStream in) Decrypts the specified input stream.
java.io.OutputStream	encrypt(java.io.OutputStream outputStream) Encrypts the specified output stream.
void	finish(java.io.InputStream in) This method is invoked after the decrypted input stream is used allowing the Cipher implementation to do any maintenance work required, such as flushing internal cache.
void	finish(java.io.OutputStream out) This method is invoked after the encrypted output stream is used allowing the Cipher implementation to do any maintenance work required, such as flushing an internal cache.
int	getKeysize()
void	setKeysize(int keysize) Sets the key size to be used when creating the AES key.

Methods inherited from class java.lang.Object

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

Constructor Detail

AESCipherImpl

public AESCipherImpl(java.lang.String password)
              throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

setKeysize

public void setKeysize(int keysize)

Sets the key size to be used when creating the AES key. Using anything larger than 128 may make the data file non-portable.

The key size cannot be changed after this Cipher is used.

getKeysize

public int getKeysize()

encrypt

public java.io.OutputStream encrypt(java.io.OutputStream outputStream)
                             throws java.lang.Exception

Description copied from interface: URIConverter.Cipher

Encrypts the specified output stream.

Specified by:

encrypt in interface URIConverter.Cipher

Returns:

an encrypted output stream

Throws:

java.lang.Exception

finish

public void finish(java.io.OutputStream out)
            throws java.lang.Exception

Description copied from interface: URIConverter.Cipher

This method is invoked after the encrypted output stream is used allowing the Cipher implementation to do any maintenance work required, such as flushing an internal cache.

Specified by:

finish in interface URIConverter.Cipher

Parameters:

out - the encrypted stream returned by URIConverter.Cipher.encrypt(OutputStream).

Throws:

java.lang.Exception

decrypt

public java.io.InputStream decrypt(java.io.InputStream in)
                            throws java.lang.Exception

Description copied from interface: URIConverter.Cipher

Decrypts the specified input stream.

Specified by:

decrypt in interface URIConverter.Cipher

Returns:

a decrypted input stream

Throws:

java.lang.Exception

finish

public void finish(java.io.InputStream in)
            throws java.lang.Exception

Description copied from interface: URIConverter.Cipher

This method is invoked after the decrypted input stream is used allowing the Cipher implementation to do any maintenance work required, such as flushing internal cache.

Specified by:

finish in interface URIConverter.Cipher

Parameters:

in - the stream returned by URIConverter.Cipher.decrypt(InputStream).

Throws:

java.lang.Exception