edu.vt.middleware.crypt.pbe
Class OpenSSLKeyGenerator

java.lang.Object
  edu.vt.middleware.crypt.pbe.OpenSSLKeyGenerator

All Implemented Interfaces:

KeyGenerator

public class OpenSSLKeyGenerator
extends Object
implements KeyGenerator

Implements a password generation function compatible with the enc operation of OpenSSL in PBE mode. The function is based on a variant of the PBKDF1 key generation function described in PKCS#5v2, but uses an invariant MD5 hash and a fixed iteration count of 1.

Version:

$Revision: 2745 $

Author:

Middleware Services

Constructor Summary

OpenSSLKeyGenerator()
Performs key generation without a salt value.

OpenSSLKeyGenerator(byte[] saltBytes)
Creates a new key generator with the given salt bytes.

Method Summary

byte[]

generate(char[] password, int size) Generates a symmetric key from a password for use in password-based encryption schemes.

Methods inherited from class java.lang.Object

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

Constructor Detail

OpenSSLKeyGenerator

public OpenSSLKeyGenerator()

Performs key generation without a salt value. This method is intended for compatibility with old OpenSSL versions or modern OpenSSL versions of the enc command with the -nosalt option.

OpenSSLKeyGenerator

public OpenSSLKeyGenerator(byte[] saltBytes)

Creates a new key generator with the given salt bytes.

Parameters:

saltBytes - Key generation function salt data.

Method Detail

generate

public byte[] generate(char[] password,
                       int size)

Generates a symmetric key from a password for use in password-based encryption schemes.

Specified by:

generate in interface KeyGenerator

Parameters:

password - Password used as basis for generated key.

size - Size of generated key in bits, unless otherwise noted.

Returns:

Secret key bytes.