Filter callers based on process path

Question

4.00/5 (1 vote)

See more:

Hi all!

How would one go about *programatically* blocking all processes from communicating with a COM service except processes that are running from a specific location?

Possible places that I'm looking into now are the following:
In the DllGetClassObject implementation
In the IClassFactory::CreateInstance implementation

The problem is that the two methods above don't seem to have any idea about the COM client process.... so I need your help on this one.

So I guess what I really want to know is:
1- Which parts of the COM implementation know about the caller process
2- Which one of these parts is the best place to "deny" the caller request.

p.s. if you haven't guessed it by now, I know nothing about COM :sigh:

Posted 19-Feb-11 9:19am

Ribhi Kamal

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2011-02-19T09:26:00

Solution 1

You may change a bit the point of view and make the COM service requiring a runtime licence from its clients. This way only allowed clients will access it.
:)

Posted 19-Feb-11 9:26am

CPallini

Comments

Ribhi Kamal 19-Feb-11 15:37pm

Thanks! But I'm really unfamiliar with runtime licence (not that it makes a difference). However, I'd like to explore the process path way to its fullest before giving up :). The next step would be to verify the process signer.