/**
* Copyright (C) 2010-2012 Regis Montoya (aka r3gis - www.r3gis.fr)
* This file is part of CSipSimple.
*
* CSipSimple is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* If you own a pjsip commercial license you can also redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as an android library.
*
* CSipSimple is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CSipSimple. If not, see <http://www.gnu.org/licenses/>.
*/
package com.csipsimple.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;
public class MD5 {
public static boolean checkMD5(String md5, File updateFile)
throws IOException {
if (md5 == null || md5 == "" || updateFile == null) {
return false;
}
String calculatedDigest = calculateMD5(updateFile);
if (calculatedDigest == null) {
return false;
}
return calculatedDigest.equalsIgnoreCase(md5);
}
public static String calculateMD5(File updateFile) {
MessageDigest digest = null;
try {
digest = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
return null;
}
InputStream is = null;
try {
is = new FileInputStream(updateFile);
} catch (FileNotFoundException e) {
return null;
}
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);
String output = bigInt.toString(16);
// Fill to 32 chars
output = String.format("%32s", output).replace(' ', '0');
return output;
} 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);
}
}
}
public static String MD5Hash(String s) {
MessageDigest m = null;
try {
m = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return "";
}
m.update(s.getBytes(),0,s.length());
String hash = new BigInteger(1, m.digest()).toString(16);
return hash;
}
}