Strong Name Validation Failed

Question

Two machines. Both with .NET 3.5 and the VS 2008 VC++ SP1 redistributables

A single exe which uses two signed DLLs, one in C++/CLI and one in C#

The exe load

Answer 1

Open the command prompt as administrator and enter following commands:

reg DELETE "HKLM\Software\Microsoft\StrongName\Verification" /f
reg ADD "HKLM\Software\Microsoft\StrongName\Verification\*,*" /f
reg DELETE "HKLM\Software\Wow6432Node\Microsoft\StrongName\Verification" /f
reg ADD "HKLM\Software\Wow6432Node\Microsoft\StrongName\Verification\*,*" /f

Answer 2

Right-click on Project → Properties → Build tab → Platform Target → Select "x64"

Answer 3

Open the command prompt as administrator and enter the following command:

"C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bin\x64\sn.exe" -Vr <dllpath>

Pay attention that the argument are case sensitive. Source with more details: http://blogs.msdn.com/b/keithmg/archive/2012/03/20/strong-name-validation-failed-exception-from-hresult-0x8013141a.aspx

Answer 4

Is the one the code runs on a "development" machine where you might have run "sn.exe -Vr AssemblyName.dll" at some stage which would allow you to use a delay signed assembly as if it were fully signed. When you transfer the delay signed assembly to another machine and run it, it will fail strong name validation because it is not fully signed.

Answer 5

The SN.EXE is Missing in Newer versions of Visual Studio. In Visual studio 2012, we must use "Developer command prompt for Visual studio 2012". Then Run the command "sn".

Syntax: sn -Vr *,2d58152b8e842be2

where "2d58152b8e842be2" is the public key token shown in the Error message. Somehow this alone did not solve my problem.

Answer 6

I fixed this by going to the Build menu (top pane) and say "Rebuild xxxProject.plugin" for that specific project only, contrary to building the entire solution.