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This is a set of utilities and classes that I have found useful over the years. In my career spanning over a decade, I have time and again written the same code or some part of the code over and over again. I never found the time to collate the details in a reusable library. This project will be a collection of such files. The work that I have been doing is more than 5 years old, however the project has been conceived in 2011.

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/*******************************************************************************
 * Copyright 2011 @ Kapil Viren Ahuja
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License 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.kapil.framework.crypto;

import org.apache.commons.codec.binary.Base64;

import com.kapil.framework.lang.StringUtils;


/**
 * Provides utility methods for conversion from and to Base-64 encoding.
 */
public final class Base64Util
{
    private static final Base64 DECODER = new Base64();

    private static final Base64 ENCODER = new Base64();


    private Base64Util()
    {
    }


    /**
     * Decodes a string containing Base-64 characters.
     * 
     */
    public static byte[] decode(String input)
    {
        byte[] output = null;

        if (StringUtils.isNotBlank(input))
        {
            output = DECODER.decode(input);
        }

        return output;
    }


    /**
     * Encodes an array of bytes using encoding of type Base-64.
     * 
     * @param input An array of bytes to be encoded.
     * @return A {@link java.lang.String} containing encoded output.
     */
    public static String encode(byte[] input)
    {
        return input == null ? null : ENCODER.encodeToString(input);
    }
}