Package tech.mgl.utils.security.gen

Class Base32String

java.lang.Object

tech.mgl.utils.security.gen.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. TODO(sarvar): Revisit this encoding and whether this ambiguity needs fixing.

Author:

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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Base32String.DecodingException

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Base32String(String alphabet)

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Details

Base32String

protected Base32String(String alphabet)

Method Details

decode

public static byte[] decode(String encoded)
                     throws Base32String.DecodingException

Throws:

Base32String.DecodingException

decodeInternal

protected byte[] decodeInternal(String encoded)
                         throws Base32String.DecodingException

Throws:

Base32String.DecodingException

encode

public static String encode(byte[] data)

encodeInternal

protected String encodeInternal(byte[] data)

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException