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.NET Forum / Languages / Managed C++ / May 2004How to secure DLL code
Hi All. This might not be the correct place to ask this question... Then again I'm not sure where else to ask this... When you build a DLL to use with "OUR" code... How do you prevent others from using the DLL? Thanks. Regards. Augie > This might not be the correct place to ask this question... Then again I'm > not sure where else to ask this... > > When you build a DLL to use with "OUR" code... How do you prevent others > from using the DLL? On some fine (or terrible, depending on your point of view) day there may be a "secure" version of Windows which allows only "trusted" applications to run. Until then, your are pretty much on your own. In the DLL you can call GetModuleFilename() or something to find out who is calling you and perhaps decide to accommodate him or not but nothing you can come up with is going to be foolproof. You might want to look into hardware "dongles" like the ones sold by Hasp and Sentinel which don't out of the box restrict the caller's per se but try to insure that only licensed end-users run the application. Regards, Will Will, Thanks... We can see there was a lot of effort put on this by MS part... :-) Is it possible to build *.lib files instead of *.dll instead (.Net code)? Augie > > This might not be the correct place to ask this question... Then again > I'm [quoted text clipped - 18 lines] > Regards, > Will > Thanks... We can see there was a lot of effort put on this by MS part... The world hasn't seen a lot of secure operating systems. The DoD has spent about a half a billion dollars on the likes of the old Blacker but they aren't talking much. > Is it possible to build *.lib files instead of *.dll instead (.Net code)? Good question for which I don't have an answer. Do you know about NetModules? Regards, Will Will, NetModules? Augie > > Thanks... We can see there was a lot of effort put on this by MS part... > [quoted text clipped - 9 lines] > Regards, > Will > NetModules? Your initial question asked about libraries. You can look at a Net Module as a very loose equivalent of a library in the sense that it is not meant to stand on its own but rather become part of a larger assembly to be linked later. Take a look at this link, especially the discussion of the NOASSEMBLY option: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/html/vcr efEECOMCompilation.asp Regards, Will Don't know if this would help, but one technique we've used is to create a small segment of shared memory and then have "OUR" app write magic bits to it. If the DLL doesn't see the correct bits, then it won't provide any functionality. -Michael Viking > Hi All. > [quoted text clipped - 9 lines] > > Augie Thanks. That's a good idea. We plan on using a security key with our software. I just didn't want to have a check in every function/class. So I'm going to have to look for a way to validation here and there and then fail if the key is not present. Regards, Augie > Don't know if this would help, but one technique we've used is to create a > small segment of shared memory and then have "OUR" app write magic bits to [quoted text clipped - 17 lines] > > > > Augie Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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