/*******************************************************************************
* Copyright (c) May 18, 2011 Zend Technologies Ltd.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*******************************************************************************/
package org.zend.sdklib.internal.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* @inspired {@link http://www.javalobby.org/java/forums/t84420.html}
* @author Roy, 2011
*/
public class Md5Util {
public static String getMd5(File f) throws NoSuchAlgorithmException,
FileNotFoundException {
MessageDigest digest = MessageDigest.getInstance("MD5");
InputStream is = new FileInputStream(f);
byte[] buffer = new byte[8192];
int read = 0;
try {
while ((read = is.read(buffer)) > 0) {
digest.update(buffer, 0, read);
}
byte[] md5sum = digest.digest();
BigInteger bigInt = new BigInteger(1, md5sum);
return bigInt.toString(16);
} catch (IOException e) {
throw new RuntimeException("Unable to process file for MD5", e);
} finally {
try {
is.close();
} catch (IOException e) {
throw new RuntimeException(
"Unable to close input stream for MD5 calculation", e);
}
}
}
}