javax.crypto.spec
Class PBEParameterSpec

java.lang.Object
  |
  +--javax.crypto.spec.PBEParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

Direct Known Subclasses:

IaikPBEParameterSpec

public class PBEParameterSpec

extends Object

implements AlgorithmParameterSpec

Specification for PBE (Password based encryption) parameters.

Attention: This is not a SUN implementation!

This class has been developed by IAIK according to the documentation publically available.
For SUNīs documentation of this class see http://java.sun.com/security/JCE1.2/spec/apidoc/index.html

This class represents a parameter specification to be used by password-based encryption according to the PKCS#5 Password-Based Encryption Standard. PKCS#5 describes a method for encrypting a given message (octet string) with the DES algorithm in CBC mode using a secret key which is derived from a password with the MD5 or MD2 message-digest algorithm.

Password based encryption according to PKCS#5 uses an eight-octet string (salt value) and a positive integer (iteration count) as parameters. The salt value should be chosen independently from the password; a suggested way is to take the first eight octets of the message digest of the octet string resulting when concatenating the password and the message to be encrypted. The iteration count is used for varying the time to derive a DES key from the password. Therefore the password is concatenated with the salt value and repeatedly digested using the MD5 (MD2) algorithm iteration count times. (see http://www.rsa.com/rsalabs/pubs/PKCS/html/pkcs-5.html)

Version:

File Revision 15

See Also:

AlgorithmParameterSpec, PBEKeySpec

Constructor Summary

PBEParameterSpec(byte[] salt, int iterationCount)
Creates a PBE parameter specification from given salt and iteration count value.

Method Summary

int	getIterationCount() Returns the iteration count.
byte[]	getSalt() Returns the salt.

Methods inherited from class java.lang.Object

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

Constructor Detail

PBEParameterSpec

public PBEParameterSpec(byte[] salt,
                        int iterationCount)

Creates a PBE parameter specification from given salt and iteration count value.

Parameters:

salt - the salt value

iterationCount - the iteration count value

Method Detail

getSalt

public byte[] getSalt()

Returns the salt.

Returns:

the salt

getIterationCount

public int getIterationCount()

Returns the iteration count.

Returns:

the iteration count