org.apache.kerby.kerberos.kerb.crypto.dh

Class OctetString2Key

java.lang.Object

org.apache.kerby.kerberos.kerb.crypto.dh.OctetString2Key

public class OctetString2Key
extends Object

From RFC 4556: Define the function octetstring2key() as follows: octetstring2key(x) == random-to-key(K-truncate( SHA1(0x00 | x) | SHA1(0x01 | x) | SHA1(0x02 | x) | ... )) where x is an octet string; | is the concatenation operator; 0x00, 0x01, 0x02, etc. are each represented as a single octet; random- to-key() is an operation that generates a protocol key from a bitstring of length K; and K-truncate truncates its input to the first K bits. Both K and random-to-key() are as defined in the kcrypto profile [RFC3961] for the enctype of the AS reply key.

Version:

$Rev$, $Date$

Author:

Apache Directory Project

Constructor Summary

Constructors

Constructor and Description
OctetString2Key()

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	kTruncate(int k, byte[] x) Performs the function K-truncate to generate the AS reply key k.

Methods inherited from class java.lang.Object

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

Constructor Detail

OctetString2Key

public OctetString2Key()

Method Detail

kTruncate

public static byte[] kTruncate(int k,
               byte[] x)

Performs the function K-truncate to generate the AS reply key k.

Parameters:

k - The k

x - The x

Returns:

The AS reply key value.