org.bouncycastle.util.encoders
Class Base32Encoder

java.lang.Object
  org.bouncycastle.util.encoders.Base32Encoder

All Implemented Interfaces:

Encoder

public class Base32Encoder

extends java.lang.Object

implements Encoder

A streaming Base32 encoder.

Constructor Summary

Base32Encoder()
Base constructor for RFC 4648, Section 6.

Base32Encoder(byte[] encodingTable, byte padding)
Constructor allowing the setting of an alternative alphabet.

Method Summary

int	decode(byte[] data, int off, int length, java.io.OutputStream out) decode the base 32 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 32 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 32 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

Constructor Detail

Base32Encoder

public Base32Encoder()

Base constructor for RFC 4648, Section 6.

Base32Encoder

public Base32Encoder(byte[] encodingTable,
                     byte padding)

Constructor allowing the setting of an alternative alphabet.

Parameters:

encodingTable - a 32 entry encoding table to do the mapping.

padding - the padding value to use.

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 32 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 32 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 32 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