93 lines
2.0 KiB
Java
93 lines
2.0 KiB
Java
package org.dclermonte.siba.model;
|
|
|
|
import java.io.File;
|
|
import java.io.FileInputStream;
|
|
import java.io.FileReader;
|
|
import java.io.IOException;
|
|
import java.security.MessageDigest;
|
|
import java.security.NoSuchAlgorithmException;
|
|
|
|
import org.apache.commons.compress.utils.IOUtils;
|
|
|
|
public class SibaUtils
|
|
{
|
|
/**
|
|
*
|
|
* @param choosenFile
|
|
* @return
|
|
* @throws IOException
|
|
*/
|
|
public static String loadMD5Sum(final File choosenFile) throws IOException
|
|
{
|
|
String result = "";
|
|
|
|
if (choosenFile.exists() && (choosenFile.length() > 32))
|
|
{
|
|
FileReader fileReader = new FileReader(choosenFile);
|
|
char[] md5 = new char[32];
|
|
byte[] md5byte = new byte[32];
|
|
for (int index = 0; index < 32; index++)
|
|
{
|
|
md5[index] = (char) fileReader.read();
|
|
md5byte[index] = (byte) md5[index];
|
|
result = result + md5[index];
|
|
}
|
|
fileReader.close();
|
|
}
|
|
|
|
//
|
|
//
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method calculate the MD5 itself.
|
|
*
|
|
* @param input
|
|
* @return
|
|
* @throws IOException
|
|
* @throws NoSuchAlgorithmException
|
|
*/
|
|
public static String md5(final File input) throws IOException, NoSuchAlgorithmException
|
|
{
|
|
String result;
|
|
StringBuilder hashString = new StringBuilder();
|
|
FileInputStream fileInputStream = null;
|
|
try
|
|
{
|
|
byte[] byteInput = new byte[(int) input.length()];
|
|
fileInputStream = new FileInputStream(input);
|
|
for (int index1 = 0; index1 < input.length(); index1++)
|
|
{
|
|
byteInput[index1] = (byte) fileInputStream.read();
|
|
}
|
|
byte[] hash = null;
|
|
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
|
|
hash = messageDigest.digest(byteInput);
|
|
|
|
for (int index = 0; index < hash.length; index++)
|
|
{
|
|
String hex = Integer.toHexString(hash[index]);
|
|
if (hex.length() == 1)
|
|
{
|
|
hashString.append('0');
|
|
hashString.append(hex.charAt(hex.length() - 1));
|
|
}
|
|
else
|
|
{
|
|
hashString.append(hex.substring(hex.length() - 2));
|
|
}
|
|
}
|
|
fileInputStream.close();
|
|
|
|
result = hashString.toString();
|
|
}
|
|
finally
|
|
{
|
|
IOUtils.closeQuietly(fileInputStream);
|
|
}
|
|
//
|
|
return result;
|
|
}
|
|
}
|