com.yubico.base

Class Pof

java.lang.Object

com.yubico.base.Pof

public class Pof
extends Object

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

Author:

Simon

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Pof()

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(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

Constructor Detail

Pof

private Pof()

Method Detail

parse

public static Token parse(String block,
          byte[] key)
                   throws 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:

GeneralSecurityException - If decryption fails.

decrypt

public static byte[] decrypt(byte[] key,
             byte[] decoded)
                      throws 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:

GeneralSecurityException - If decryption fails.