/*
* LinShare is an open source filesharing software, part of the LinPKI software
* suite, developed by Linagora.
*
* Copyright (C) 2015 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 © 2009–2015. 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()));
}
}
}