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I’m toying around with the idea of using C#’s ability to compile code on-demand as the basis of a scripting language. I was wondering, how can I sandbox the scripts that I am executing so that they cannot access the file system, network, etc. Basically, I want restricted permissions on the script being run.
Steps that I take:
CompilerResults r = CSharpCodeProvider.CompileAssemblyFromSource(source);
Assembly a = r.CompiledAssembly;
IScript s = a.CreateInstance(...);
s.EntryPoint(...);
The recommended approach for this is to execute the suspect code in a sandboxed appdomain. Several reasons are given at http://blogs.msdn.com/b/shawnfa/archive/2006/04/19/579066.aspx, and an even more important one is that most of the other potential approaches are deprecated as of .NET 4.0.