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/*
* 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.sejda.sambox.pdmodel.encryption;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* Utility class for creating MessageDigest instances.
*
* @author John Hewson
*/
final class MessageDigests
{
private MessageDigests()
{
}
/**
* @return MD5 message digest
*/
static MessageDigest getMD5()
{
try
{
return MessageDigest.getInstance("MD5");
}
catch (NoSuchAlgorithmException e)
{
// should never happen
throw new RuntimeException(e);
}
}
/**
* @return SHA-1 message digest
*/
static MessageDigest getSHA1()
{
try
{
return MessageDigest.getInstance("SHA-1");
}
catch (NoSuchAlgorithmException e)
{
// should never happen
throw new RuntimeException(e);
}
}
/**
* @return SHA-256 message digest
*/
static MessageDigest getSHA256()
{
try
{
return MessageDigest.getInstance("SHA-256");
}
catch (NoSuchAlgorithmException e)
{
// should never happen
throw new RuntimeException(e);
}
}
}
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