org.linguafranca.pwdb.security

Class Encryption

java.lang.Object

org.linguafranca.pwdb.security.Encryption

public class Encryption
extends Object

Encryption and decryption utilities..

Author:

jo

Constructor Summary

Constructors

Constructor and Description
Encryption()

Method Summary

Modifier and Type	Method and Description
static InputStream	getDecryptedInputStream(InputStream encryptedInputStream, byte[] keyData, byte[] ivData) Create a decrypted input stream from an encrypted one
static byte[]	getDigest(String string) Gets a digest for a UTF-8 encoded string
static byte[]	getDigest(String string, String encoding) Gets a digest for a string
static OutputStream	getEncryptedOutputStream(OutputStream decryptedOutputStream, byte[] keyData, byte[] ivData) Create an encrypted output stream from an unencrypted output stream
static byte[]	getFinalKeyDigest(byte[] key, byte[] masterSeed, byte[] transformSeed, long transformRounds) Create a final key from the parameters passed
static MessageDigest	getMessageDigestInstance() Gets a SHA-256 message digest instance

Methods inherited from class java.lang.Object

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

Constructor Detail

Encryption

public Encryption()

Method Detail

getDigest

public static byte[] getDigest(String string)

Gets a digest for a UTF-8 encoded string

Parameters:

string - the string

Returns:

a digest as a byte array

getDigest

public static byte[] getDigest(String string,
                               String encoding)

Gets a digest for a string

Parameters:

string - the string

encoding - the encoding of the String

Returns:

a digest as a byte array

getMessageDigestInstance

public static MessageDigest getMessageDigestInstance()

Gets a SHA-256 message digest instance

Returns:

A MessageDigest

getFinalKeyDigest

public static byte[] getFinalKeyDigest(byte[] key,
                                       byte[] masterSeed,
                                       byte[] transformSeed,
                                       long transformRounds)

Create a final key from the parameters passed

getDecryptedInputStream

public static InputStream getDecryptedInputStream(InputStream encryptedInputStream,
                                                  byte[] keyData,
                                                  byte[] ivData)

Create a decrypted input stream from an encrypted one

getEncryptedOutputStream

public static OutputStream getEncryptedOutputStream(OutputStream decryptedOutputStream,
                                                    byte[] keyData,
                                                    byte[] ivData)

Create an encrypted output stream from an unencrypted output stream