org.bouncycastle.util.encoders

Class Base64Encoder

java.lang.Object

org.bouncycastle.util.encoders.Base64Encoder

All Implemented Interfaces:

Encoder

Direct Known Subclasses:

UrlBase64Encoder

public class Base64Encoder
extends java.lang.Object
implements Encoder

A streaming Base64 encoder.

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	decodingTable
protected byte[]	encodingTable
protected byte	padding

Constructor Summary

Constructors

Constructor and Description
Base64Encoder()

Method Summary

Modifier and Type	Method and Description
int	decode(byte[] data, int off, int length, java.io.OutputStream out) decode the base 64 encoded byte data writing it to the given output stream, whitespace characters will be ignored.
int	decode(java.lang.String data, java.io.OutputStream out) decode the base 64 encoded String data writing it to the given output stream, whitespace characters will be ignored.
int	encode(byte[] inBuf, int inOff, int inLen, byte[] outBuf, int outOff)
int	encode(byte[] buf, int off, int len, java.io.OutputStream out) encode the input data producing a base 64 output stream.
int	getEncodedLength(int inputLength) Return the expected output length of the encoding.
int	getMaxDecodedLength(int inputLength) Return the maximum expected output length of a decoding.
protected void	initialiseDecodingTable()

Methods inherited from class java.lang.Object

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

Field Detail

encodingTable

protected final byte[] encodingTable

padding

protected byte padding

decodingTable

protected final byte[] decodingTable

Constructor Detail

Base64Encoder

public Base64Encoder()

Method Detail

initialiseDecodingTable

protected void initialiseDecodingTable()

encode

public int encode(byte[] inBuf,
                  int inOff,
                  int inLen,
                  byte[] outBuf,
                  int outOff)
           throws java.io.IOException

Throws:

java.io.IOException

getEncodedLength

public int getEncodedLength(int inputLength)

Description copied from interface: Encoder

Return the expected output length of the encoding.

Specified by:

getEncodedLength in interface Encoder

Parameters:

inputLength - the input length of the data.

Returns:

the output length of an encoding.

getMaxDecodedLength

public int getMaxDecodedLength(int inputLength)

Description copied from interface: Encoder

Return the maximum expected output length of a decoding. If padding is present the value returned will be greater than the decoded data length.

Specified by:

getMaxDecodedLength in interface Encoder

Parameters:

inputLength - the input length of the encoded data.

Returns:

the upper bound of the output length of a decoding.

encode

public int encode(byte[] buf,
                  int off,
                  int len,
                  java.io.OutputStream out)
           throws java.io.IOException

encode the input data producing a base 64 output stream.

Specified by:

encode in interface Encoder

Returns:

the number of bytes produced.

Throws:

java.io.IOException

decode

public int decode(byte[] data,
                  int off,
                  int length,
                  java.io.OutputStream out)
           throws java.io.IOException

decode the base 64 encoded byte data writing it to the given output stream, whitespace characters will be ignored.

Specified by:

decode in interface Encoder

Returns:

the number of bytes produced.

Throws:

java.io.IOException

decode

public int decode(java.lang.String data,
                  java.io.OutputStream out)
           throws java.io.IOException

decode the base 64 encoded String data writing it to the given output stream, whitespace characters will be ignored.

Specified by:

decode in interface Encoder

Returns:

the number of bytes produced.

Throws:

java.io.IOException