Package org.apache.james.mime4j.storage

Class CipherStorageProvider

java.lang.Object

org.apache.james.mime4j.storage.AbstractStorageProvider

org.apache.james.mime4j.storage.CipherStorageProvider

All Implemented Interfaces:

StorageProvider

public class CipherStorageProvider
extends AbstractStorageProvider

A StorageProvider that transparently scrambles and unscrambles the data stored by another StorageProvider.

Example usage:

 StorageProvider mistrusted = new TempFileStorageProvider();
 StorageProvider enciphered = new CipherStorageProvider(mistrusted);
 StorageProvider provider = new ThresholdStorageProvider(enciphered);
 DefaultStorageProvider.setInstance(provider);
 

Constructor Summary

Constructors

Constructor	Description
CipherStorageProvider(StorageProvider backend)	Creates a new CipherStorageProvider for the given back-end using the Blowfish cipher algorithm.
CipherStorageProvider(StorageProvider backend, String algorithm)	Creates a new CipherStorageProvider for the given back-end and cipher algorithm.

Method Summary

Modifier and Type	Method	Description
StorageOutputStream	createStorageOutputStream()	Creates a StorageOutputStream where data to be stored can be written to.

Methods inherited from class org.apache.james.mime4j.storage.AbstractStorageProvider

store

Methods inherited from class java.lang.Object

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

Constructor Detail

CipherStorageProvider

public CipherStorageProvider(StorageProvider backend)

Creates a new CipherStorageProvider for the given back-end using the Blowfish cipher algorithm.

Parameters:

backend - back-end storage strategy to encrypt.

CipherStorageProvider

public CipherStorageProvider(StorageProvider backend,
                             String algorithm)

Creates a new CipherStorageProvider for the given back-end and cipher algorithm.

Parameters:

backend - back-end storage strategy to encrypt.

algorithm - the name of the symmetric block cipher algorithm such as "Blowfish", "AES" or "RC2".

Method Detail

createStorageOutputStream

public StorageOutputStream createStorageOutputStream()
                                              throws IOException

Description copied from interface: StorageProvider

Creates a StorageOutputStream where data to be stored can be written to. Subsequently the user can call toStorage() on that object to get a Storage instance that holds the data that has been written.

Returns:

a StorageOutputStream where data can be written to.

Throws:

IOException - if an I/O error occurs.