how to use ICLRStrongName in .NET 4?

Question

Related to my previous posts I'm moving to .NET 4. I've found that using the previous StrongName.h to get my assembly signing key in unmanaged code is now deprecated, and I need to use MetaHost.h and ICLRStrongName::StrongNameTokenFromAssembly.

The previous StrongNameTokenFromAssembly(..) was very straight forward, now this new one has no documentation on how to use. Does anyone have experience with this interface?

Answer 1

Wow... that required a lot of hacking around. Here we go!

ICLRMetaHost *pMetaHost = NULL;
HRESULT hr = CLRCreateInstance(CLSID_CLRMetaHost,
               IID_ICLRMetaHost, (LPVOID*)&pMetaHost);  
if(hr == S_OK)
{
  WCHAR version[100];
  DWORD size;

  hr == pMetaHost->GetVersionFromFile(MyGetApplicationExecutablePath().c_str(), (LPWSTR) &version, &size);
  if(hr == S_OK)
  {
     LPWSTR assemblyVer = version;
     ICLRRuntimeInfo *pRuntimInfo = NULL;

     hr = pMetaHost->GetRuntime(assemblyVer, IID_ICLRRuntimeInfo, (LPVOID*)&pRuntimInfo);
     if (hr == S_OK)
     {
        ICLRStrongName *pStrongName = NULL;
        hr = pRuntimInfo->GetInterface(CLSID_CLRStrongName, IID_ICLRStrongName, (LPVOID*)&pStrongName);

        if(hr == S_OK)
        {
           pStrongName->StrongNameTokenFromAssembly(MyGetApplicationExecutablePath().c_str(), &token, &len);
           DWORD verified = 0;
           BOOLEAN sigVerified = pStrongName->StrongNameSignatureVerification(MyGetApplicationExecutablePath().c_str(), SN_INFLAG_FORCE_VER  , &verified);
           if (!verified)
           {
              //Do something nasty here if the Signature verification failed
           }
           pStrongName->StrongNameFreeBuffer(token);
        }
     }
  }

}