Solved

Own serialization of Java classes (SecretKey)

Posted on 2002-07-26
3
353 Views
Last Modified: 2008-03-10
Hi

I’ve read on a web site (http://www.securingjava.com/chapter-seven/chapter-seven-1.html) that it is not a good idea (for security reasons) to use serialization.  I’ve implemented the security suggestions.

Now my class that’s the most critical concerning security needs to “save” its state.  I was thinking of encrypting the member variables and then writing it out to disk. (This is not foolproof but its better)
The member variable that I need to store is: javax.crypto.SecretKey

My thinking is to get the object into a byte [] or stream of some sort, encrypt it and then write it out to disk.  But how? (getting the object into a byte[])

How does serialization do this?
Or
Can one serialize to a memory file?

Thanx
André
0
Comment
Question by:Fortress_Initiative
3 Comments
 
LVL 4

Accepted Solution

by:
antons061400 earned 350 total points
ID: 7179791

SecretKey key = .....
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(bos);
oos.writeObject(key);
oos.flush();
byte[] barray = bos.toByteArray();

Is this what you need for overwriting serialization of your class?
0
 
LVL 1

Expert Comment

by:klf
ID: 7179810
>My thinking is to get the object into a byte [] or stream of >some sort, encrypt it and then write it out to disk.  But >how? (getting the object into a byte[])

This sounds like serialization to me.  I have not done a lot with serialization but it seems to me that you should be able to serialize the object (javax.crypto.SecretKey) into an in memory stream, encrypt it , then write it to disk.  To unserialize it just decrypt and then unserialize it.  
0
 

Author Comment

by:Fortress_Initiative
ID: 7179940
Thanx antons and klf.

I'll try antons' suggestion, just now.  I can encrypt the barray and write it out to file.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Requested array size exceeds VM limit 3 84
rhino JavaScript import, load 25 66
Java SE 8u111  Lot of stuff broke 11 53
session migration servlets 2 24
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…

919 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now