com.github.megatronking.stringfog.plugin.utils.MD5 Maven / Gradle / Ivy

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A String encryption Library for Android

There is a newer version: 5.2.0

/*
 * Copyright (C) 2017, Megatron King
 *
 * 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.github.megatronking.stringfog.plugin.utils;

import java.security.MessageDigest;

public class MD5 {

    private MD5() {
    }

    /**
     * get md5 string for input buffer
     *
     * @param buffer data to be calculated
     * @return md5 result in string format
     */
    public static String getMessageDigest(byte[] buffer) {
        char[] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
        try {
            MessageDigest mdTemp = MessageDigest.getInstance("MD5");
            mdTemp.update(buffer);
            byte[] md = mdTemp.digest();
            int j = md.length;
            char[] str = new char[j * 2];
            int k = 0;
            for (byte byte0: md) {
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }


}