Does full trust mean the same as Run As Administrator

Question

Does full trust mean the same as Run As Administrator? I have read things stating that "for this to work, the application must be a full-trust application." Is that the same as you must have administrator privileges to run the application? If not, what's the difference? How can you tell if an app is "full-trust"?

I am told that "Administrator or not, .Net apps won't do certain things if they aren't running from a 'trusted' location." What is a "trusted location"? If you run an app from a "trusted location", can you do things that "require full-trust" without being an administrator?

Fumikofumitory

Answer 1

No. Full-trust is a .NET term used to indicate that it's not running in a reduced-priviledge .NET sandbox. In .NET prior to 3.5 SP1, this included running from a network share (in the default configuration). It also includes running as a ClickOnce application that has not requested additional permissions, or in some other browser-based sandbox.

Full-trust means it can do anything the user it is running as can do, not that is running as an administrator.

Flap

Answer 2

No. As of version 2.0, the .Net framework has it's own little filesystem setup for security. Administrator or not, .Net apps won't do certain things if they aren't running from a 'trusted' location.

Just about anything on your local hard drive is trusted, but (and supposedly they fixed this for 3.5sp1) even the local intranet is not trusted, so most .Net desktop apps will fail to even start if they're sitting on a network drive or share.

You can change the configuration on a machine so it will allow apps from that zone, but it has to be done for every machine that's going to run the application, which breaks a common corporate deployment scenario.

From an ASP.Net standpoint, it also means that certain activities require more 'trust' than others. Sending e-mail, for example, can cause exceptions if not set up correctly.

Promethean

Answer 3

Basically Full Trust means that the C# code has total control over the current (.Net) process and all processes running under the Application Pool account.

It is the same as running a C++ dll

Admin access will depend on the IIS settings (ie. if you run the website under System or an admin account)

Rightward