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/*
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*
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*
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* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* file and include the License file at packager/legal/LICENSE.txt.
*
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*
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package com.sun.messaging.jmq.util;
import java.io.*;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;
import java.math.BigInteger;
import java.security.SecureRandom;
import java.security.MessageDigest;
import com.sun.messaging.jmq.util.BASE64Encoder;
import com.sun.messaging.jmq.util.BASE64Decoder;
public class PassfileObfuscatorImpl implements PassfileObfuscator
{
private static final String FORMAT_VERSION = "01F4"; //500
private static final String MAGIC = "4D51"+FORMAT_VERSION; //MQ
private static String OBSUFFIX_START = "{";
private static String OBSUFFIX_END = "}";
private static String OBSUFFIX_MAGIC_END= MAGIC+OBSUFFIX_END;
/**
*/
@Override
public void
obfuscateFile(String source, String target, String prefix)
throws IOException {
try {
FileReader fr = new FileReader(source);
BufferedReader br = new BufferedReader(fr);
FileWriter fw = new FileWriter(target);
BufferedWriter bw = new BufferedWriter(fw);
MessageDigest md = MessageDigest.getInstance("SHA-256");
BASE64Encoder encoder = new BASE64Encoder();
String line = null;
while ((line = br.readLine()) != null) {
if (line.startsWith(prefix)) {
int ind = line.indexOf("=");
if (ind > 0 && line.length() > (ind+1)) {
String key = line.substring(0, ind);
key = key.trim();
if (!key.endsWith(OBSUFFIX_MAGIC_END)) {
String pw = line.substring(ind+1);
String epw = encoder.encode(pw.getBytes("UTF8"));
SecureRandom random = new SecureRandom();
byte randombytes[] = new byte[4];
random.nextBytes(randombytes);
String finalmagic = new BigInteger(randombytes).toString(16)+MAGIC;
String hashstr = hashpw(pw, finalmagic, md);
bw.write(key+OBSUFFIX_START+finalmagic+OBSUFFIX_END+"="+hashstr+":"+epw);
bw.newLine();
continue;
}
}
}
bw.write(line);
bw.newLine();
}
bw.close();
fw.close();
br.close();
fr.close();
} catch (IOException e) {
throw e;
} catch (Exception ee) {
throw new IOException(ee.toString(), ee);
}
}
@Override
public void
deobfuscateFile(String source, String target, String prefix)
throws IOException {
deobfuscateFile(source, target, prefix, false);
}
private List unobfuscatedKeys =
Collections.synchronizedList(new ArrayList());
private StringBuffer
deobfuscateFile(String source, String target, String prefix, boolean returnContentOnly)
throws IOException {
try {
unobfuscatedKeys.clear();
FileReader fr = new FileReader(source);
BufferedReader br = new BufferedReader(fr);
MessageDigest md = MessageDigest.getInstance("SHA-256");
BASE64Decoder decoder = new BASE64Decoder();
StringBuffer contents = new StringBuffer();
String line = null;
while ((line = br.readLine()) != null) {
if (line.startsWith(prefix)) {
int ind = line.indexOf("=");
if (ind > 0 && line.length() > (ind+1)) {
String key = line.substring(0, ind);
key = key.trim();
if (key.endsWith(OBSUFFIX_MAGIC_END)) {
String hashepw = line.substring(ind+1);
int ind2 = hashepw.indexOf(":");
if (ind2 > 0 && hashepw.length() > (ind2+1)) {
String epw = hashepw.substring(ind2+1);
String hashstr = hashepw.substring(0, ind2);
byte[] hashbytes = decoder.decodeBuffer(epw);
String pw = new String(hashbytes, "UTF8");
int indstart = key.lastIndexOf(OBSUFFIX_START);
if (indstart < 0 || indstart >= key.lastIndexOf(OBSUFFIX_MAGIC_END)) {
throw new IOException(
"Corrupted line["+indstart+", "+key.lastIndexOf(OBSUFFIX_MAGIC_END)+"]: "+line);
}
int indend = key.lastIndexOf(OBSUFFIX_END);
if (indend < 0 || indend <= (indstart+OBSUFFIX_MAGIC_END.length())) {
throw new IOException(
"Corrupted line["+indend+", "+indstart+"+"+OBSUFFIX_MAGIC_END.length()+"]: "+line);
}
String finalmagic = key.substring(indstart+1, indend);
String myhashstr = hashpw(pw, finalmagic, md);
if (!hashstr.equals(myhashstr)) {
throw new IOException("Password corrupted in line: "+line);
}
contents.append(key.substring(0, indstart)+"="+pw);
contents.append(System.getProperty("line.separator"));
continue;
} else {
throw new IOException(
"Corrupted line["+ind2+", "+hashepw.length()+", "+(ind2+1)+"]: "+line);
}
} else {
unobfuscatedKeys.add(key);
}
}
}
contents.append(line);
contents.append(System.getProperty("line.separator"));
}
if (returnContentOnly) {
br.close();
fr.close();
return contents;
}
FileWriter fw = new FileWriter(target);
BufferedWriter bw = new BufferedWriter(fw);
String str = contents.toString();
bw.write(str);
bw.close();
fw.close();
br.close();
fr.close();
return null;
} catch (IOException e) {
throw e;
} catch (Exception ee) {
throw new IOException(ee.toString(), ee);
}
}
@Override
public InputStream
retrieveObfuscatedFile(String source, String prefix)
throws IOException {
StringBuffer contents = deobfuscateFile(source, null, prefix, true);
byte[] bytes = contents.toString().getBytes("UTF8");
ByteArrayInputStream pipeis = new ByteArrayInputStream(bytes);
return pipeis;
}
public boolean isObfuscated(String source, String prefix) throws IOException {
return unobfuscatedKeys.isEmpty();
}
private String hashpw(String pw, String finalmagic, MessageDigest md)
throws Exception {
byte[] salt = finalmagic.getBytes("UTF8");
boolean even = false;
if (salt[0]%2 == 0) {
even = true;
byte b0 = salt[0];
salt[0] = salt[salt.length-1];
salt[salt.length-1] = b0;
} else {
byte b1 = salt[1];
salt[1] = salt[salt.length-1];
salt[salt.length-1] = b1;
}
md.reset();
md.update(salt);
byte[] hashbytes = md.digest(pw.getBytes("UTF8"));
if (even) {
md.reset();
hashbytes = md.digest(hashbytes);
md.reset();
hashbytes = md.digest(hashbytes);
} else {
md.reset();
hashbytes = md.digest(hashbytes);
}
return new BigInteger(hashbytes).toString(16);
}
public static void main(String args[]) {
try {
PassfileObfuscator po = new PassfileObfuscatorImpl();
System.out.println("obfuscating file");
po.obfuscateFile("myfile", "myfile2", "imq");
System.out.println("deobfuscating file");
po.deobfuscateFile("myfile2", "myfile3", "imq");
System.out.println("Reading normal file");
InputStream is = po.retrieveObfuscatedFile("myfile", "imq");
FileWriter fw = new FileWriter("myfile4");
java.util.Properties prop1 = new java.util.Properties();
prop1.load(is);
fw.close();
is.close();
System.out.println(prop1);
System.out.println("Reading modified file");
is = po.retrieveObfuscatedFile("myfile2", "imq");
java.util.Properties prop2 = new java.util.Properties();
prop2.load(is);
System.out.println(prop2);
System.out.println("DONE");
fw.close();
is.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
