Package 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 Details

    • OctetString2Key

      public OctetString2Key()

  • Method Details

    • 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.