org.linagora.linshare.core.utils.HashUtils.java Source code

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Here is the source code for org.linagora.linshare.core.utils.HashUtils.java

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/*
 * LinShare is an open source filesharing software, part of the LinPKI software
 * suite, developed by Linagora.
 * 
 * Copyright (C) 2014 LINAGORA
 * 
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version, provided you comply with the Additional Terms applicable for
 * LinShare software by Linagora pursuant to Section 7 of the GNU Affero General
 * Public License, subsections (b), (c), and (e), pursuant to which you must
 * notably (i) retain the display of the LinShare? trademark/logo at the top
 * of the interface window, the display of the You are using the Open Source
 * and free version of LinShare, powered by Linagora  20092014. Contribute to
 * Linshare R&D by subscribing to an Enterprise offer!? infobox and in the
 * e-mails sent with the Program, (ii) retain all hypertext links between
 * LinShare and linshare.org, between linagora.com and Linagora, and (iii)
 * refrain from infringing Linagora intellectual property rights over its
 * trademarks and commercial brands. Other Additional Terms apply, see
 * <http://www.linagora.com/licenses/> for more details.
 * 
 * This program 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 Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License and
 * its applicable Additional Terms for LinShare along with this program. If not,
 * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License
 * version 3 and <http://www.linagora.com/licenses/> for the Additional Terms
 * applicable to LinShare software.
 */
package org.linagora.linshare.core.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

import org.apache.commons.lang.ArrayUtils;

public class HashUtils {

    private HashUtils() {
    }

    public static String hashSha1withBase64(byte[] b) {
        return hashWithBase64(b, "SHA1");
    }

    public static String hashMd5withBase64(byte[] b) {
        return hashWithBase64(b, "MD5");
    }

    public static String hashSshawithBase64(byte[] b, byte[] salt) {
        return hashWithBase64(b, salt, "SHA1");
    }

    /**
     * generate salt (32 bits/4 octets)
     * @return
     */
    public static byte[] getSalt() {
        // Get 32 random bits
        byte[] mybytes;
        try {
            // Create a secure random number generator
            SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");

            // Create secure number generator with seed
            int seedByteCount = 10;
            byte[] seed = sr.generateSeed(seedByteCount);

            sr = SecureRandom.getInstance("SHA1PRNG");
            sr.setSeed(seed);

            mybytes = new byte[32 / 8];
            sr.nextBytes(mybytes);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
        return mybytes;
    }

    /**
     * hash an array of byte with a given salt
     * @param b array of byte to digest
     * @param salt can be null. if not it is appended to the array of bytes before doing the digest.
     * @param HashAlgo may be MD5, SHA1 ...
     * @return a base 64 string, with the encoded salt at the end if exist.
     */
    private static String hashWithBase64(byte[] b, byte[] salt, String HashAlgo) {
        byte[] res = null;

        MessageDigest md;
        try {
            md = MessageDigest.getInstance(HashAlgo);
            md.reset();
            md.update(b);
            if (salt != null)
                md.update(salt);
            res = md.digest();

        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }

        if (salt == null) {
            return Base64Utils.encodeBytes(res);
        } else {
            res = ArrayUtils.addAll(res, salt);
            return Base64Utils.encodeBytes(res);
        }
    }

    private static String hashWithBase64(byte[] b, String HashAlgo) {
        return hashWithBase64(b, null, HashAlgo);
    }

    public static byte[] giveBytesHashSha1withBase64(byte[] b) {

        byte[] res = null;

        try {
            res = hashSha1withBase64(b).getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
        return res;
    }

    /**
     * give sha1 fingerprint for a file
     * @param file
     * @return array of sha1 bytes
     */
    public static byte[] hashSha1(File file) {

        byte[] mdbytes = null;

        try {
            MessageDigest md = MessageDigest.getInstance("SHA1");
            FileInputStream fis = new FileInputStream(file);
            byte[] dataBytes = new byte[1024];
            int nread = fis.read(dataBytes);
            while (nread > 0) {
                md.update(dataBytes, 0, nread);
                nread = fis.read(dataBytes);
            }
            mdbytes = md.digest();
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

        return mdbytes;
    }

    /**
     * compute sha1 with base 64 from a argument
     * usefull to compute hash to insert in sql script
     * @param args
     */
    public static void main(String[] args) {
        if (args.length > 0) {
            System.out.println(args[0] + ":" + HashUtils.hashSha1withBase64(args[0].trim().getBytes()));
        }
    }

}