com.speedment.runtime.core.internal.util.Hash Maven / Gradle / Ivy
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A Speedment bundle that shades all dependencies into one jar. This is
useful when deploying an application on a server.
/**
*
* Copyright (c) 2006-2018, Speedment, Inc. 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. 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.speedment.runtime.core.internal.util;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import static com.speedment.runtime.core.util.StaticClassUtil.instanceNotAllowed;
/**
*
* @author Duncan
*/
public final class Hash {
/**
* Creates and returns an MD5 from the given UTF-8 encoded String.
*
* @param str UTF-8 encoded String
* @return an MD5 from the given UTF-8 encoded String
*/
public static String md5(String str) {
try {
final MessageDigest md = MessageDigest.getInstance("MD5");
final byte[] mdbytes = md.digest(str.getBytes(StandardCharsets.UTF_8));
// convert the byte to hex format method 1
final StringBuffer sb = new StringBuffer();
for (int i = 0; i < mdbytes.length; i++) {
sb.append(Integer.toString((mdbytes[i] & 0xff) + 0x100, 16).substring(1));
}
return sb.toString();
} catch (NoSuchAlgorithmException ex) {
throw new RuntimeException("MD5 algorithm not supported.", ex);
}
}
/**
* Utility classes should not be instantiated.
*/
private Hash() {
instanceNotAllowed(getClass());
}
}