/*
* Copyright 2013-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package com.amazonaws.util;
/**
* A Base 32 codec API. See http://www.ietf.org/rfc/rfc4648.txt
*
* @author Hanson Char
*/
public enum Base32 {
;
private static final Base32Codec codec = new Base32Codec();
/**
* Returns a base 32 encoded string of the given bytes.
*/
public static String encodeAsString(byte... bytes) {
if (bytes == null)
return null;
return bytes.length == 0 ? "" : CodecUtils.toStringDirect(codec.encode(bytes));
}
/**
* Returns a 32 encoded byte array of the given bytes. hchar: compared to
* Base32.encode(byte[]) of JakartaCommons-1.5, this routine is > 20x faster
* on my MacAir.
*/
public static byte[] encode(byte[] bytes) {
return bytes == null || bytes.length == 0 ? bytes : codec.encode(bytes);
}
/**
* Decodes the given base 32 encoded string, skipping carriage returns, line
* feeds and spaces as needed. hchar: compared to Base32.decode(String) of
* JakartaCommons-1.5, this routine is > 11x faster on my MacAir.
*/
public static byte[] decode(String b32) {
if (b32 == null)
return null;
if (b32.length() == 0)
return new byte[0];
byte[] buf = new byte[b32.length()];
int len = CodecUtils.sanitize(b32, buf);
return codec.decode(buf, len);
}
/**
* Decodes the given base 32 encoded bytes.
*/
public static byte[] decode(byte[] b32) {
return b32 == null || b32.length == 0 ? b32 : codec.decode(b32, b32.length);
}
}