com.annahid.libs.artenus.security

Base64

Base64 converter class. This code is not a complete MIME encoder; it simply converts binary data to base64 data and back.

Note CharBase64 is a GWT-compatible implementation of this class.

public class Base64

Field Summary

Modifier and Type	Field and Description
`public static final`	`DECODE` Specify decoding (value is false).
`public static final`	`ENCODE` Specify encoding (value is true).

Method Summary

Modifier and Type	Method and Description
`public static byte`	decode(String s) Decodes data from Base64 notation.
`public static byte`	decode(byte[] source) Decodes Base64 content in byte array format and returns the decoded byte array.
`public static byte`	decode(byte[] source, int off, int len) Decodes Base64 content in byte array format and returns the decoded byte array.
`public static byte`	decode(byte[] source, int off, int len, byte[] decodabet) Decodes Base64 content using the supplied decodabet and returns the decoded byte array.
`public static byte`	decodeWebSafe(String s) Decodes data from web safe Base64 notation.
`public static byte`	decodeWebSafe(byte[] source) Decodes web safe Base64 content in byte array format and returns the decoded data.
`public static byte`	decodeWebSafe(byte[] source, int off, int len) Decodes web safe Base64 content in byte array format and returns the decoded byte array.
`public static String`	encode(byte[] source) Encodes a byte array into Base64 notation.
`public static String`	encode(byte[] source, int off, int len, byte[] alphabet, boolean doPadding) Encodes a byte array into Base64 notation.
`public static byte`	encode(byte[] source, int off, int len, byte[] alphabet, int maxLineLength) Encodes a byte array into Base64 notation.
`public static String`	encodeWebSafe(byte[] source, boolean doPadding) Encodes a byte array into web safe Base64 notation.

Methods inherited from java.lang.Object

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

Field Detail

DECODE
public static final DECODE Specify decoding (value is false).

ENCODE
public static final ENCODE Specify encoding (value is true).

Method Detail

decode

public static byte decode(
    String s
)

Decodes data from Base64 notation.

Parameters:

s	the string to decode (decoded in default encoding)

Returns:

the decoded data

decode

public static byte decode(
    byte[] source
)

Decodes Base64 content in byte array format and returns the decoded byte array.

Parameters:

source

The Base64 encoded data

Returns:

decoded data

Throws:

Base64DecoderException

decode

public static byte decode(
    byte[] source,
    int off,
    int len
)

Decodes Base64 content in byte array format and returns the decoded byte array.

Parameters:

source	the Base64 encoded data
off	the offset of where to begin decoding
len	the length of characters to decode

Returns:

decoded data

Throws:

Base64DecoderException

decode

public static byte decode(
    byte[] source,
    int off,
    int len,
    byte[] decodabet
)

Decodes Base64 content using the supplied decodabet and returns the decoded byte array.

Parameters:

source	the Base64 encoded data
off	the offset of where to begin decoding
len	the length of characters to decode
decodabet	the decodabet for decoding Base64 content

Returns:

decoded data

decodeWebSafe

public static byte decodeWebSafe(
    String s
)

Decodes data from web safe Base64 notation. Web safe encoding uses '-' instead of '+', '_' instead of '/'

Parameters:

s	the string to decode (decoded in default encoding)

Returns:

the decoded data

decodeWebSafe

public static byte decodeWebSafe(
    byte[] source
)

Decodes web safe Base64 content in byte array format and returns the decoded data. Web safe encoding uses '-' instead of '+', '_' instead of '/'

Parameters:

source

the string to decode (decoded in default encoding)

Returns:

the decoded data

decodeWebSafe

public static byte decodeWebSafe(
    byte[] source,
    int off,
    int len
)

Decodes web safe Base64 content in byte array format and returns the decoded byte array. Web safe encoding uses '-' instead of '+', '_' instead of '/'

Parameters:

source	the Base64 encoded data
off	the offset of where to begin decoding
len	the length of characters to decode

Returns:

decoded data

encode

public static String encode(
    byte[] source
)

Encodes a byte array into Base64 notation. Equivalent to calling encodeBytes(source, 0, source.length)

Parameters:

source

The data to convert

encode

public static String encode(
    byte[] source,
    int off,
    int len,
    byte[] alphabet,
    boolean doPadding
)

Encodes a byte array into Base64 notation.

Parameters:

source	the data to convert
off	offset in array where conversion should begin
len	length of data to convert
alphabet	the encoding alphabet
doPadding	is true to pad result with '=' chars if it does not fall on 3 byte boundaries

encode

public static byte encode(
    byte[] source,
    int off,
    int len,
    byte[] alphabet,
    int maxLineLength
)

Encodes a byte array into Base64 notation.

Parameters:

source	the data to convert
off	offset in array where conversion should begin
len	length of data to convert
alphabet	is the encoding alphabet
maxLineLength	maximum length of one line.

Returns:

the BASE64-encoded byte array

encodeWebSafe

public static String encodeWebSafe(
    byte[] source,
    boolean doPadding
)

Encodes a byte array into web safe Base64 notation.

Parameters:

source	The data to convert
doPadding	is true to pad result with '=' chars if it does not fall on 3 byte boundaries