CODEWITHSUNDEEP
c#uwpobfuscationcrypto-obfuscator
Dr. Andrew Burnett-Thompson
Dr. Andrew Burnett-Thompson

Reputation: 21521

CryptoObfuscator error obfuscating UWP assembly

When trying to obfuscate a UWP (WinRT) AnyCPU assembly using CryptoObfuscator, the following error messages are observed:

1.) When merging in LogicNP.CryptoLicensing.WinRT.dll (a WinRT assembly) into a UWP DLL:

Error occurred while obfuscation: - .Net framework version type of the licensing assembly (Silverlight) does not match the version type of the obfuscating assembly (Normal).

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2.) When merging of the licensing assembly is ignored:

Error occurred while obfuscation: System.IO.FileNotFoundException - System.IO.FileNotFoundException: could not result: System.Runtime, Version=4.0.20.0, Culture=neutral... Specify the path where this assembly resides using 'Search Directories'

Has anyone successfully used CryptoObfuscator (which is advertised as working on any .NET assembly) successfully?

enter image description here

Upvotes: 0

Views: 1328

Answers (2)

Alan Senderovsky
Alan Senderovsky

Reputation: 11

Try Download from nuget "Microsoft.NETCore.UniversalWindowsPlatform" and copy "System.Runtime.dll" downloaded from nuget to CryptoObfuscator folder.

Upvotes: 1

Guido Leenders
Guido Leenders

Reputation: 4262

There are in fact two issues to take into account when using CryptObfuscator in this scenario:

To obfuscate for other .NET versions, the following must be added to each relevant csproj in addition to setting the target framework to :

<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>

This resolves most can not find file issues when obfuscating.

For System.Runtime, you will need to download and open the NuGet package of System.Runtime. In the lib folder you will find some nice hacks that depend on the CLR in use and glue the rest of your .NET assemblies together with the CLR, such as using forwarded types for .NET 4.7. But in the ref folder such as for netstandard1.5 you will find a System.Runtime.dll. Copy that one manually to the output folder or a location where CryptoObfuscator will search.

You can also put it in another folder, and specify in CryptoObfuscator a search directory using Project Properties or in XML:

<SearchDirectories>
  <SearchDirectory Path="PATH" />
</SearchDirectories>

Upvotes: 2

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