Re: [IronPython] Safe execution of python scripts on my .net application
I think this happens if the new appdomain cannot load the required assembly. By default, the new appdomain should inherit its BaseDirectory property from the creating domain and should be able to load Microsoft.Scripting.dll. Is your exe and all the dlls in the same folder? If not, can you try to put all assemblies in the same folder (or in the GAC) to see if it works? If that works, you can then figure out how to configure the new appdomain such that it can load Microsoft.Scripting.dll. There may be some setting in AppDomainSetup, or you could hook the AssemblyResolve event... From: users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.com] On Behalf Of Nicolás Buttarelli Sent: Tuesday, November 03, 2009 12:08 PM To: Discussion of IronPython Subject: Re: [IronPython] Safe execution of python scripts on my .net application Hi again, thanks for your clear response. I was trying to do what you proposed but it is not working. I am receiving an exception: Test method CadworX3WCFRestTest.IronPython.SafeScriptExecutionTest.writingAFileTest threw exception: System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.. I tried to find a solution but I couldn't. This is the minimal code that I am running to get this exception (I have removed all the security stuff but apparently that does not resolve the problem): AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain); ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); ScriptSource source = engine.CreateScriptSourceFromString(pythonScript); SriptScope scope = engine.CreateScope(); source.Execute(scope); The exception is thronged in this line: ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); Do you have any idea which could be the problem? Thanks again, Nicolas On Mon, Nov 2, 2009 at 10:25 PM, Dino Viehland di...@microsoft.commailto:di...@microsoft.com wrote: Assuming the app domain is setup properly then there's no way for the Python code to elevate permissions (modulo CLR security bugs which are few and far between). This is because IronPython its self is 100% security transparent and does not affect any security decisions or assert any form of trust - so it's all up to the CLR to limit permissions. So for example while you can access the file object, or import ctypes, or call various other Python APIs which would require trust you'll get a security exception from the CLR when you don't have permissions to do something. For more complex scenarios you might also have an object model which you expose to the application and inject in via its scope. Once you've done that you'll want to make sure that the object model is also secure. From: users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com] On Behalf Of Nicolás Buttarelli Sent: Monday, November 02, 2009 1:20 PM To: Discussion of IronPython Subject: Re: [IronPython] Safe execution of python scripts on my .net application Thanks for your response. But what happens with the python code? Does not exist a way to write some scripts that can do some damage to my app, the server, the database, etc? Thanks again, Nicolas On Mon, Nov 2, 2009 at 9:41 PM, Dino Viehland di...@microsoft.commailto:di...@microsoft.com wrote: After creating your app domain you can do: ScriptEngine engine = Python.CreateEngine(someAppDomain); And then the rest of your code should work as it's written. From: users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com] On Behalf Of Nicolás Buttarelli Sent: Monday, November 02, 2009 12:39 PM To: users@lists.ironpython.commailto:users@lists.ironpython.com Subject: [IronPython] Safe execution of python scripts on my .net application Sorry, I don't know if my previous message have arrived. So, here it is: Hello all, I am starting with python and I would like to add to my web application some web services. This services will allow the different clients of my application to execute some python scripts. I would like to know if someone did this before and how can I do this in a secure way. I mean, how can I do to restrict the environment where the scripts will be executed. In .net I can do this using the AppDoman and setting the permission set. AppDomain.CreateDomain( string friendlyName, Evidence securityInfo, AppDomainSetup info, PermissionSet grantSet, params StrongName[] fullTrustAssemblies); Is there a way to do the same with my python scripts? I am running them using this: ScriptEngine engine = Python.CreateEngine();
Re: [IronPython] Safe execution of python scripts on my .net application
Thanks Shri, I will try. In addition, I found this open issue: http://dlr.codeplex.com/WorkItem/View.aspx?WorkItemId=2816. I think that it is related. On Tue, Nov 3, 2009 at 9:29 PM, Shri Borde shri.bo...@microsoft.com wrote: I think this happens if the new appdomain cannot load the required assembly. By default, the new appdomain should inherit its BaseDirectory property from the creating domain and should be able to load Microsoft.Scripting.dll. Is your exe and all the dlls in the same folder? If not, can you try to put all assemblies in the same folder (or in the GAC) to see if it works? If that works, you can then figure out how to configure the new appdomain such that it can load Microsoft.Scripting.dll. There may be some setting in AppDomainSetup, or you could hook the AssemblyResolve event… *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Tuesday, November 03, 2009 12:08 PM *To:* Discussion of IronPython *Subject:* Re: [IronPython] Safe execution of python scripts on my .net application Hi again, thanks for your clear response. I was trying to do what you proposed but it is not working. I am receiving an exception: *Test method CadworX3WCFRestTest.IronPython.SafeScriptExecutionTest.writingAFileTest threw exception: System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'..* I tried to find a solution but I couldn't. This is the minimal code that I am running to get this exception (I have removed all the security stuff but apparently that does not resolve the problem): *AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain);* *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* *ScriptSource source = engine.CreateScriptSourceFromString(pythonScript);* *SriptScope scope = engine.CreateScope();* *source.Execute(scope);* The exception is thronged in this line: *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* Do you have any idea which could be the problem? Thanks again, Nicolas On Mon, Nov 2, 2009 at 10:25 PM, Dino Viehland di...@microsoft.com wrote: Assuming the app domain is setup properly then there’s no way for the Python code to elevate permissions (modulo CLR security bugs which are few and far between). This is because IronPython its self is 100% security transparent and does not affect any security decisions or assert any form of trust – so it’s all up to the CLR to limit permissions. So for example while you can access the file object, or import ctypes, or call various other Python APIs which would require trust you’ll get a security exception from the CLR when you don’t have permissions to do something. For more complex scenarios you might also have an object model which you expose to the application and inject in via its scope. Once you’ve done that you’ll want to make sure that the object model is also secure. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 1:20 PM *To:* Discussion of IronPython *Subject:* Re: [IronPython] Safe execution of python scripts on my .net application Thanks for your response. But what happens with the python code? Does not exist a way to write some scripts that can do some damage to my app, the server, the database, etc? Thanks again, Nicolas On Mon, Nov 2, 2009 at 9:41 PM, Dino Viehland di...@microsoft.com wrote: After creating your app domain you can do: ScriptEngine engine = Python.CreateEngine(someAppDomain); And then the rest of your code should work as it’s written. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 12:39 PM *To:* users@lists.ironpython.com *Subject:* [IronPython] Safe execution of python scripts on my .net application Sorry, I don't know if my previous message have arrived. So, here it is: Hello all, I am starting with python and I would like to add to my web application some web services. This services will allow the different clients of my application to execute some python scripts. I would like to know if someone did this before and how can I do this in a secure way. I mean, how can I do to restrict the environment where the scripts will be executed. In .net I can do this using the AppDoman and setting the permission set. AppDomain.CreateDomain( string friendlyName, Evidence securityInfo, AppDomainSetup info, PermissionSet grantSet, params StrongName[] fullTrustAssemblies);
Re: [IronPython] Safe execution of python scripts on my .net application
I have create a new Test Project and an Unit Test class in order to test the following code inside: AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain); ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); ScriptSource source = engine.CreateScriptSourceFromString(pythonScript); ScriptScope scope = engine.CreateScope(); source.Execute(scope); I have add the references: - IronPython - Microsoft.Scripting - Microsoft.ScriptingCore But it still not working and throwing the same System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting. Any ideas? 2009/11/3 Nicolás Buttarelli nbuttare...@gmail.com Thanks Shri, I will try. In addition, I found this open issue: http://dlr.codeplex.com/WorkItem/View.aspx?WorkItemId=2816. I think that it is related. On Tue, Nov 3, 2009 at 9:29 PM, Shri Borde shri.bo...@microsoft.comwrote: I think this happens if the new appdomain cannot load the required assembly. By default, the new appdomain should inherit its BaseDirectory property from the creating domain and should be able to load Microsoft.Scripting.dll. Is your exe and all the dlls in the same folder? If not, can you try to put all assemblies in the same folder (or in the GAC) to see if it works? If that works, you can then figure out how to configure the new appdomain such that it can load Microsoft.Scripting.dll. There may be some setting in AppDomainSetup, or you could hook the AssemblyResolve event… *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Tuesday, November 03, 2009 12:08 PM *To:* Discussion of IronPython *Subject:* Re: [IronPython] Safe execution of python scripts on my .net application Hi again, thanks for your clear response. I was trying to do what you proposed but it is not working. I am receiving an exception: *Test method CadworX3WCFRestTest.IronPython.SafeScriptExecutionTest.writingAFileTest threw exception: System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'..* I tried to find a solution but I couldn't. This is the minimal code that I am running to get this exception (I have removed all the security stuff but apparently that does not resolve the problem): *AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain); * *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* *ScriptSource source = engine.CreateScriptSourceFromString(pythonScript); * *SriptScope scope = engine.CreateScope();* *source.Execute(scope);* The exception is thronged in this line: *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* Do you have any idea which could be the problem? Thanks again, Nicolas On Mon, Nov 2, 2009 at 10:25 PM, Dino Viehland di...@microsoft.com wrote: Assuming the app domain is setup properly then there’s no way for the Python code to elevate permissions (modulo CLR security bugs which are few and far between). This is because IronPython its self is 100% security transparent and does not affect any security decisions or assert any form of trust – so it’s all up to the CLR to limit permissions. So for example while you can access the file object, or import ctypes, or call various other Python APIs which would require trust you’ll get a security exception from the CLR when you don’t have permissions to do something. For more complex scenarios you might also have an object model which you expose to the application and inject in via its scope. Once you’ve done that you’ll want to make sure that the object model is also secure. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 1:20 PM *To:* Discussion of IronPython *Subject:* Re: [IronPython] Safe execution of python scripts on my .net application Thanks for your response. But what happens with the python code? Does not exist a way to write some scripts that can do some damage to my app, the server, the database, etc? Thanks again, Nicolas On Mon, Nov 2, 2009 at 9:41 PM, Dino Viehland di...@microsoft.com wrote: After creating your app domain you can do: ScriptEngine engine = Python.CreateEngine(someAppDomain); And then the rest of your code should work as it’s written. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 12:39 PM *To:* users@lists.ironpython.com *Subject:* [IronPython] Safe execution of python scripts on my .net application Sorry, I don't know if my previous message have arrived.
Re: [IronPython] Safe execution of python scripts on my .net application
Hi again, thanks for your clear response. I was trying to do what you proposed but it is not working. I am receiving an exception: *Test method CadworX3WCFRestTest.IronPython.SafeScriptExecutionTest.writingAFileTest threw exception: System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.. * I tried to find a solution but I couldn't. This is the minimal code that I am running to get this exception (I have removed all the security stuff but apparently that does not resolve the problem): *AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain);* * * *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* *ScriptSource source = engine.CreateScriptSourceFromString(pythonScript);* *SriptScope scope = engine.CreateScope();* *source.Execute(scope);* The exception is thronged in this line: *ScriptEngine engine = Python.CreateEngine(aSandboxedDomain);* Do you have any idea which could be the problem? Thanks again, Nicolas On Mon, Nov 2, 2009 at 10:25 PM, Dino Viehland di...@microsoft.com wrote: Assuming the app domain is setup properly then there’s no way for the Python code to elevate permissions (modulo CLR security bugs which are few and far between). This is because IronPython its self is 100% security transparent and does not affect any security decisions or assert any form of trust – so it’s all up to the CLR to limit permissions. So for example while you can access the file object, or import ctypes, or call various other Python APIs which would require trust you’ll get a security exception from the CLR when you don’t have permissions to do something. For more complex scenarios you might also have an object model which you expose to the application and inject in via its scope. Once you’ve done that you’ll want to make sure that the object model is also secure. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 1:20 PM *To:* Discussion of IronPython *Subject:* Re: [IronPython] Safe execution of python scripts on my .net application Thanks for your response. But what happens with the python code? Does not exist a way to write some scripts that can do some damage to my app, the server, the database, etc? Thanks again, Nicolas On Mon, Nov 2, 2009 at 9:41 PM, Dino Viehland di...@microsoft.com wrote: After creating your app domain you can do: ScriptEngine engine = Python.CreateEngine(someAppDomain); And then the rest of your code should work as it’s written. *From:* users-boun...@lists.ironpython.com [mailto: users-boun...@lists.ironpython.com] *On Behalf Of *Nicolás Buttarelli *Sent:* Monday, November 02, 2009 12:39 PM *To:* users@lists.ironpython.com *Subject:* [IronPython] Safe execution of python scripts on my .net application Sorry, I don't know if my previous message have arrived. So, here it is: Hello all, I am starting with python and I would like to add to my web application some web services. This services will allow the different clients of my application to execute some python scripts. I would like to know if someone did this before and how can I do this in a secure way. I mean, how can I do to restrict the environment where the scripts will be executed. In .net I can do this using the AppDoman and setting the permission set. AppDomain.CreateDomain( string friendlyName, Evidence securityInfo, AppDomainSetup info, PermissionSet grantSet, params StrongName[] fullTrustAssemblies); Is there a way to do the same with my python scripts? I am running them using this: ScriptEngine engine = Python.CreateEngine(); ScriptSource source = engine.CreateScriptSourceFromString(scriptAsString); ScriptScope scope = engine.CreateScope(); source.Execute(scope); Thanks in advance. Nicolas ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com ___ Users mailing list Users@lists.ironpython.com http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
Re: [IronPython] Safe execution of python scripts on my .net application
Test projects are weird and somehow you don't end up inheriting the application base. This seems to work though: AppDomainSetup setup = new AppDomainSetup(); setup.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory; AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain, null, setup); ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); ScriptSource source = engine.CreateScriptSourceFromString(2+2); ScriptScope scope = engine.CreateScope(); Console.WriteLine(source.Execute(scope)); From: users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.com] On Behalf Of Nicolás Buttarelli Sent: Tuesday, November 03, 2009 1:30 PM To: Discussion of IronPython Subject: Re: [IronPython] Safe execution of python scripts on my .net application I have create a new Test Project and an Unit Test class in order to test the following code inside: AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain); ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); ScriptSource source = engine.CreateScriptSourceFromString(pythonScript); ScriptScope scope = engine.CreateScope(); source.Execute(scope); I have add the references: - IronPython - Microsoft.Scripting - Microsoft.ScriptingCore But it still not working and throwing the same System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting. Any ideas? 2009/11/3 Nicolás Buttarelli nbuttare...@gmail.commailto:nbuttare...@gmail.com Thanks Shri, I will try. In addition, I found this open issue: http://dlr.codeplex.com/WorkItem/View.aspx?WorkItemId=2816. I think that it is related. On Tue, Nov 3, 2009 at 9:29 PM, Shri Borde shri.bo...@microsoft.commailto:shri.bo...@microsoft.com wrote: I think this happens if the new appdomain cannot load the required assembly. By default, the new appdomain should inherit its BaseDirectory property from the creating domain and should be able to load Microsoft.Scripting.dll. Is your exe and all the dlls in the same folder? If not, can you try to put all assemblies in the same folder (or in the GAC) to see if it works? If that works, you can then figure out how to configure the new appdomain such that it can load Microsoft.Scripting.dll. There may be some setting in AppDomainSetup, or you could hook the AssemblyResolve event... From: users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com [mailto:users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com] On Behalf Of Nicolás Buttarelli Sent: Tuesday, November 03, 2009 12:08 PM To: Discussion of IronPython Subject: Re: [IronPython] Safe execution of python scripts on my .net application Hi again, thanks for your clear response. I was trying to do what you proposed but it is not working. I am receiving an exception: Test method CadworX3WCFRestTest.IronPython.SafeScriptExecutionTest.writingAFileTest threw exception: System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Microsoft.Scripting.Hosting.ScriptRuntimeSetup,Microsoft.Scripting, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.. I tried to find a solution but I couldn't. This is the minimal code that I am running to get this exception (I have removed all the security stuff but apparently that does not resolve the problem): AppDomain aSandboxedDomain = AppDomain.CreateDomain(Sandboxed Domain); ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); ScriptSource source = engine.CreateScriptSourceFromString(pythonScript); SriptScope scope = engine.CreateScope(); source.Execute(scope); The exception is thronged in this line: ScriptEngine engine = Python.CreateEngine(aSandboxedDomain); Do you have any idea which could be the problem? Thanks again, Nicolas On Mon, Nov 2, 2009 at 10:25 PM, Dino Viehland di...@microsoft.commailto:di...@microsoft.com wrote: Assuming the app domain is setup properly then there's no way for the Python code to elevate permissions (modulo CLR security bugs which are few and far between). This is because IronPython its self is 100% security transparent and does not affect any security decisions or assert any form of trust - so it's all up to the CLR to limit permissions. So for example while you can access the file object, or import ctypes, or call various other Python APIs which would require trust you'll get a security exception from the CLR when you don't have permissions to do something. For more complex scenarios you might also have an object model which you expose to the application and inject in via its scope. Once you've done that you'll want to make sure that the object model is also secure. From: users-boun...@lists.ironpython.commailto:users-boun...@lists.ironpython.com
