kiwi.text
Class Radix64Codec
java.lang.Object
|
+--kiwi.text.Radix64Codec
- public class Radix64Codec
- extends Object
This class implements a codec for the Radix-64 encoding scheme. For a
high-level interface, see the Radix64InputStream and
Radix64OutputStream filters in kiwi.io.
This codec implements Radix-64 as defined by the PGP software.
- Version:
- 1.0 (10/98)
- Author:
- Mark Lindner, PING Software Group
- See Also:
Radix64InputStream
,
Radix64OutputStream
Method Summary |
static int |
decode(byte[] input,
byte[] output)
Decode 4 bytes of printable ASCII text into up to 3 bytes of binary data. |
static byte[] |
encode(byte[] input,
int len)
Encode up to 3 bytes of binary data as 4 bytes of printable ASCII text. |
static boolean |
isRadix64Character(byte c)
Determine if a byte is a valid Radix-64 encoding character; one of the
characters: '+', '/', '=', '0' - '9', 'A' - 'Z', 'a' - 'z'. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
isRadix64Character
public static final boolean isRadix64Character(byte c)
- Determine if a byte is a valid Radix-64 encoding character; one of the
characters: '+', '/', '=', '0' - '9', 'A' - 'Z', 'a' - 'z'.
- Parameters:
c
- The byte to test.- Returns:
- true if
c
is a Radix-64 character, false
otherwise.
encode
public static final byte[] encode(byte[] input,
int len)
- Encode up to 3 bytes of binary data as 4 bytes of printable ASCII text.
- Parameters:
input
- A 3-byte long array of input.len
- The number of bytes (1, 2, or 3) that are significant in the
input.- Returns:
- A 4-byte array of printable characters that represent the
Radix-64 encoding of the input. The output will include padding ('='
characters) if not all 3 bytes of the input were significant.
decode
public static final int decode(byte[] input,
byte[] output)
- Decode 4 bytes of printable ASCII text into up to 3 bytes of binary data.
- Parameters:
input
- A 4-byte long array of input bytes.output
- A 3-byte long array in which up to 3 bytes of decoded
output will be stored.- Returns:
- The number of bytes decoded (1, 2, or 3).