112 lines
2.8 KiB
Java
112 lines
2.8 KiB
Java
/*
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* Copyright (C) 2016 Didier Clermonté <dclermonte@april.org>
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* Copyright (C) 2016 Christian Pierre Momon <christian.momon@devinsy.fr>
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*
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* This file is part of Siba.
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*
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* Siba is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.dclermonte.siba.model;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileReader;
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import java.io.IOException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import org.apache.commons.compress.utils.IOUtils;
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public class SibaUtils
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{
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/**
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*
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* @param choosenFile
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* @return
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* @throws IOException
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*/
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public static String loadMD5Sum(final File choosenFile) throws IOException
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{
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String result = "";
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if (choosenFile.exists() && (choosenFile.length() > 32))
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{
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FileReader fileReader = new FileReader(choosenFile);
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char[] md5 = new char[32];
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byte[] md5byte = new byte[32];
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for (int index = 0; index < 32; index++)
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{
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md5[index] = (char) fileReader.read();
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md5byte[index] = (byte) md5[index];
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result = result + md5[index];
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}
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fileReader.close();
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}
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//
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//
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return result;
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}
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/**
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* This method calculate the MD5 itself.
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*
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* @param input
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* @return
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* @throws IOException
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* @throws NoSuchAlgorithmException
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*/
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public static String md5(final File input) throws IOException, NoSuchAlgorithmException
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{
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String result;
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StringBuilder hashString = new StringBuilder();
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FileInputStream fileInputStream = null;
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try
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{
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byte[] byteInput = new byte[(int) input.length()];
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fileInputStream = new FileInputStream(input);
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for (int index1 = 0; index1 < input.length(); index1++)
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{
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byteInput[index1] = (byte) fileInputStream.read();
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}
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byte[] hash = null;
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MessageDigest messageDigest = MessageDigest.getInstance("MD5");
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hash = messageDigest.digest(byteInput);
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for (int index = 0; index < hash.length; index++)
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{
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String hex = Integer.toHexString(hash[index]);
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if (hex.length() == 1)
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{
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hashString.append('0');
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hashString.append(hex.charAt(hex.length() - 1));
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}
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else
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{
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hashString.append(hex.substring(hex.length() - 2));
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}
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}
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fileInputStream.close();
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result = hashString.toString();
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}
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finally
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{
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IOUtils.closeQuietly(fileInputStream);
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}
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//
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return result;
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}
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}
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