org.mortbay.util

Class B64Code

public class B64Code extends Object

Fast B64 Encoder/Decoder as described in RFC 1421.

Does not insert or interpret whitespace as described in RFC 1521. If you require this you must pre/post process your data.

Note that in a web context the usual case is to not want linebreaks or other white space in the encoded output.

Version: $Revision: 1.8 $

Author: Brett Sealey (bretts) Greg Wilkins (gregw)

Method Summary
static Stringdecode(String s)
Base 64 decode as described in RFC 1421.
static Stringdecode(String s, String charEncoding)
Base 64 decode as described in RFC 1421.
static byte[]decode(char[] b)
Fast Base 64 decode as described in RFC 1421.
static Stringencode(String s)
Base 64 encode as described in RFC 1421.
static Stringencode(String s, String charEncoding)
Base 64 encode as described in RFC 1421.
static char[]encode(byte[] b)
Fast Base 64 encode as described in RFC 1421.

Method Detail

decode

public static String decode(String s)
Base 64 decode as described in RFC 1421.

Does not attempt to cope with extra whitespace as described in RFC 1521.

Parameters: s String to decode

Returns: String decoded byte array.

decode

public static String decode(String s, String charEncoding)
Base 64 decode as described in RFC 1421.

Does not attempt to cope with extra whitespace as described in RFC 1521.

Parameters: s String to decode charEncoding String representing the character encoding used to map the decoded bytes into a String.

Returns: String decoded byte array.

decode

public static byte[] decode(char[] b)
Fast Base 64 decode as described in RFC 1421.

Does not attempt to cope with extra whitespace as described in RFC 1521.

Avoids creating extra copies of the input/output.

Note this code has been flattened for performance.

Parameters: b char array to decode.

Returns: byte array containing the decoded form of the input.

Throws: IllegalArgumentException if the input is not a valid B64 encoding.

encode

public static String encode(String s)
Base 64 encode as described in RFC 1421.

Does not insert whitespace as described in RFC 1521.

Parameters: s String to encode.

Returns: String containing the encoded form of the input.

encode

public static String encode(String s, String charEncoding)
Base 64 encode as described in RFC 1421.

Does not insert whitespace as described in RFC 1521.

Parameters: s String to encode. charEncoding String representing the name of the character encoding of the provided input String.

Returns: String containing the encoded form of the input.

encode

public static char[] encode(byte[] b)
Fast Base 64 encode as described in RFC 1421.

Does not insert whitespace as described in RFC 1521.

Avoids creating extra copies of the input/output.

Parameters: b byte array to encode.

Returns: char array containing the encoded form of the input.

Copyright © 2004 Mortbay Consulting Pty. Ltd. All Rights Reserved.