mmhttp.protocol
Class Base64

java.lang.Object
  mmhttp.protocol.Base64

public class Base64
extends java.lang.Object

This class supports Base 64 encoding and decoding. In this library it is primarily used for HTTP digest authentication.

 RFC 2045 - Multipurpose Internet Mail Extensions (MIME) Part One:
 Format of Internet Message Bodies
 section 6.8.  Base64 Content-Transfer-Encoding
 The encoding process represents 24-bit groups of input bits as output
 strings of 4 encoded characters.  Proceeding from left to right, a
 24-bit input group is formed by concatenating 3 8bit input groups.
 These 24 bits are then treated as 4 concatenated 6-bit groups, each
 of which is translated into a single digit in the base64 alphabet.
 When encoding a bit stream via the base64 encoding, the bit stream
 must be presumed to be ordered with the most-significant-bit first.
 That is, the first bit in the stream will be the high-order bit in
 the first 8bit byte, and the eighth bit will be the low-order bit in
 the first 8bit byte, and so on.
 

Constructor Summary

Base64()

Method Summary

static byte[]	decode(byte[] bytes) Decodes an array of encoded bytes.
static java.lang.String	decode(java.lang.String text) Decodes a block of Base 64 encoded text.
static byte[]	encode(byte[] bytes) Encodes an array of bytes.
static java.lang.String	encode(java.lang.String text) Encodes a block of text.
static byte	getValueFor(byte b) A helper method which is public only for testing purposes.

Methods inherited from class java.lang.Object

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

Constructor Detail

Base64

public Base64()

Method Detail

decode

public static java.lang.String decode(java.lang.String text)
                               throws java.lang.Exception

Decodes a block of Base 64 encoded text.

Parameters:

text - to be decoded

Returns:

decoded text

Throws:

java.lang.Exception

decode

public static byte[] decode(byte[] bytes)

Decodes an array of encoded bytes.

Parameters:

bytes - to be decoded

Returns:

decoded bytes

encode

public static java.lang.String encode(java.lang.String text)
                               throws java.lang.Exception

Encodes a block of text.

Parameters:

text - to encode

Returns:

encoded text

Throws:

java.lang.Exception

encode

public static byte[] encode(byte[] bytes)

Encodes an array of bytes.

Parameters:

bytes - to encode

Returns:

encoded bytes

getValueFor

public static byte getValueFor(byte b)

A helper method which is public only for testing purposes.

Parameters:

b -

Returns:

byte