/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.shardingsphere.elasticjob.cloud.util.digest;

import org.apache.shardingsphere.elasticjob.cloud.exception.JobSystemException;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Encryption.
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class Encryption {
    
    private static final String MD5 = "MD5";

    /**
     * Use md5 to encrypt string.
     *
     * @param str string to be encrypted
     * @return encrypted string
     */
    public static String md5(final String str) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance(MD5);
            messageDigest.update(str.getBytes());
            return new BigInteger(1, messageDigest.digest()).toString(16);
        } catch (final NoSuchAlgorithmException ex) {
            throw new JobSystemException(ex);
        }
    }
}