com.predic8.membrane.core.interceptor.authentication.session.totp

Class Base32String

java.lang.Object

com.predic8.membrane.core.interceptor.authentication.session.totp.Base32String

public class Base32String
extends Object

Encodes arbitrary byte arrays as case-insensitive base-32 strings.

The implementation is slightly different than in RFC 4648. During encoding, padding is not added, and during decoding the last incomplete chunk is not taken into account. The result is that multiple strings decode to the same byte array, for example, string of sixteen 7s ("7...7") and seventeen 7s both decode to the same byte array. TOD O(sarvar): Revisit this encoding and whether this ambiguity needs fixing. Source: http://code.google.com/p/google-authenticator License: ASL 2.0

Author:

sweis@google.com (Steve Weis), Neal Gafter

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Base32String(String alphabet)

Method Summary

Modifier and Type	Method and Description
static byte[]	decode(String encoded)
protected byte[]	decodeInternal(String encoded)
static String	encode(byte[] data)
protected String	encodeInternal(byte[] data)
static Base32String	getInstance()

Methods inherited from class java.lang.Object

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

Constructor Detail

Base32String

protected Base32String(String alphabet)

Method Detail

getInstance

public static Base32String getInstance()

decode

public static byte[] decode(String encoded)

decodeInternal

protected byte[] decodeInternal(String encoded)

encode

public static String encode(byte[] data)

encodeInternal

protected String encodeInternal(byte[] data)