com.yubico.base

Class Pof

java.lang.Object

com.yubico.base.Pof

public class Pof
extends java.lang.Object

Utility methods of use when decryption and parsing of YubiKey One Time Passwords (OTPs).

Author:

Simon

Method Summary

Methods

Modifier and Type	Method and Description
static byte[]	decrypt(byte[] key, byte[] decoded) Does AES encryption of a YubiKey OTP byte sequence.
static Token	parse(java.lang.String block, byte[] key) Decrypt and parse YubiKey OTP.

Methods inherited from class java.lang.Object

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

Method Detail

parse

public static Token parse(java.lang.String block,
          byte[] key)
                   throws java.security.GeneralSecurityException

Decrypt and parse YubiKey OTP.

Parameters:

block - Modhex encoded representation of the YubiKey OTP.

key - 128 bit AES key used to encrypt block, now will be used to ecrypt.

Throws:

java.security.GeneralSecurityException - If decryption fails.

decrypt

public static byte[] decrypt(byte[] key,
             byte[] decoded)
                      throws java.security.GeneralSecurityException

Does AES encryption of a YubiKey OTP byte sequence.

Parameters:

key - AES key.

decoded - YubiKey OTP byte sequence, Modhex.decode(String) is the typical producer of this.

Returns:

Decrypted.

Throws:

java.security.GeneralSecurityException - If decryption fails.