Package com.lambdaworks.crypto

Class PBKDF

java.lang.Object

com.lambdaworks.crypto.PBKDF

public class PBKDF
extends java.lang.Object

An implementation of the Password-Based Key Derivation Function as specified in RFC 2898.

Constructor Summary

Constructors

Constructor	Description
PBKDF()

Method Summary

Modifier and Type	Method	Description
static byte[]	pbkdf2(java.lang.String alg, byte[] P, byte[] S, int c, int dkLen)	Implementation of PBKDF2 (RFC2898).
static void	pbkdf2(javax.crypto.Mac mac, byte[] S, int c, byte[] DK, int dkLen)	Implementation of PBKDF2 (RFC2898).

Methods inherited from class java.lang.Object

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

Constructor Detail

PBKDF

public PBKDF()

Method Detail

pbkdf2

public static byte[] pbkdf2(java.lang.String alg,
                            byte[] P,
                            byte[] S,
                            int c,
                            int dkLen)
                     throws java.security.GeneralSecurityException

Implementation of PBKDF2 (RFC2898).

Parameters:

alg - HMAC algorithm to use.

P - Password.

S - Salt.

c - Iteration count.

dkLen - Intended length, in octets, of the derived key.

Returns:

The derived key.

Throws:

java.security.GeneralSecurityException

pbkdf2

public static void pbkdf2(javax.crypto.Mac mac,
                          byte[] S,
                          int c,
                          byte[] DK,
                          int dkLen)
                   throws java.security.GeneralSecurityException

Implementation of PBKDF2 (RFC2898).

Parameters:

mac - Pre-initialized Mac instance to use.

S - Salt.

c - Iteration count.

DK - Byte array that derived key will be placed in.

dkLen - Intended length, in octets, of the derived key.

Throws:

java.security.GeneralSecurityException