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Enhancing signed assembly fails

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Vincent asked on 04 Jun 2009, 11:09 AM

Hi, I'm trying to enhance a signed assembly with a MSBuild script using the "OpenAccessEnhancer" using the following statement

<OpenAccessEnhancer

Assembly="<path>\obj\Release\MyModel.dll"

KeyFile="<path>\MyKey.snk" >

Output TaskParameter="Version" PropertyName="OpenAccessEnhancerVersion" />

OpenAccessEnhancer>

When I run this I can see in the log that it enhances the class, but then it stops with the error "OpenAccess Enhancer error 0: Generated method is null. Usually this indicates, that assembly signing is used with an external key store. Please use an AssemblyKeyFileAttribute instead."

Because I keep getting te error message I tried the same thing using the commandline utility "venhance.exe". But this gives the same error message.

Using the "AssemblyKeyFileAttribute" I'm able to enhance the project. But I don't want to use a AssemblyKeyFileAttribute because that's relative to my file system and not the system on which the automated build will run.

My Visual Studio is able to build and enhance the assembly without this attribute. Therefore I've cut and past the command, used by Visual Studio (build output window), in a command prompt expecting a successfull enhancement. But even this give the same error as before.

Why is Visual Studio able to Enhance the project and is it not possible from the command line (or MSBuild script)? What am I doing wrong?

I'm using Visual Studio 2008 and 'Telerik OpenAccess Enhancer, Version 2009.1.311.1'

With regards,

Vincent

8 Answers, 1 is accepted

answered on 04 Jun 2009, 03:07 PM

Hi Vincent,

please have a look at the OpenAccess.targets file from the Telerik\OpenAccess ORM\sdk folder.
There you will see the full invocation of the enhancer:

    
             <OpenAccessEnhancer 
        
                        VerboseMode="$(EnhancementOutputLevel)" 
        
                        Assembly="@(IntermediateAssembly->'%(FullPath)')" 
        
                        SignAssembly="$(SignAssembly)" 
        
                        KeyFile="$(AssemblyOriginatorKeyFile)" 
        
                        KeyContainer="$(KeyContainerName)" 
        
                        References="@(ReferencePath)" 
        
                        ProjectReferences="@(ProjectReference)"> 
        
                        <Output TaskParameter="Version" PropertyName="OpenAccessEnhancerVersion" /> 
        
                    </OpenAccessEnhancer>

I guess that the SignAssembly setting needs to be given in addition.

Greetings,
Thomas
the Telerik team

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answered on 05 Jun 2009, 02:03 PM

Just to add to this but for using the enhancer within the Visual Studio add-in/VSIP, not MSBuild - my enhanced assemblies need signing now and i want to use a relative path to a single keyfile for all my assemblies eg AssemblyKeyFileName("..\\\..\\MyKeyFile,pfx") - this doesn;t work with openaccess - I get the same error as the OP, then i try the "keyfile:..\..\mykeyfile" switch on the compiler (within VS this is set in the VS project properties "Conditional compilation symbols" field) but this doesn't sign the assembly at all. It seems this is a major problem as AssemblyKeyFileAttribute seems to be deprecated or soemthing as the compiler or VS don't like it - but then you the openaccess enhancer complains that it can;t find the key file with a relative path - this is seriously limiting as the keyfile will ahve to be in the sam eplace in all build environments, as the KeyFile attribute is hardcoded (it could be added in MSBuild in an autogenerated file at build time but this would need a custom project/msbuild script). I wonder if an environment variable could be used.

Also for the KeyFileNameAttribute the key file needs to be a .SNK file generated by sn.exe NOT the snk.pfx generated within Visual Studio.

answered on 19 Jun 2009, 08:14 AM

Ok this is within VS2008 using the OPenAccess VSIP/Add-in, not MSBuild targets. It seems to be looking in 'C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE' for the keyfile if I specify it as just the file name in the AssemblyKeyFile Attribute - I have to use an absolute path, here's the error message:

Error 10 OpenAccess Error: Enhancer: Could not open the key file 'MyKeyFile.snk'.
You should use an absolute file name.
Reason: Could not find file 'C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\Pinpoint.snk'. MyAssembly.dll

I want to keep one keyfile for all assemblies in one place and that place should be relative to the project folders, regardless of where they are on the file system. Any chance this could be looked at?