Five 9 Dialer Plugin - Silverlight

posted Jul 18, 2012, 2:10 PM by Mona Bowerbank   [ updated Jul 18, 2012, 2:24 PM ]
For In-Browser Silverlight apps you need the following to make sure that you don’t get cross browser scripting errors:
  • Even though you plan on running this in the browser make sure that you enable running the application out of the browser
  • Require elevated trust when running in-browser needs to be enabled also.  This is all in the Silverlight properties tab
  • Signing tab – make sure you sign the Xap file
  • Create a certificate you can test with & import it
  • Registry settings on the clients machine
  • On IE  -  make sure that Enable Protected Mode is not checked off

Creating a test certificate for Xap file
I ran commands from a dos prompt to create the certificate, import it into MMC and then use VS 2010 to sign my Xap file

DOS commands for cert - I made my own root CA certificate;

makecert -n "CN=testRootCA" -r -sv testRootCA.pvk testRootCA.cer 

Then I opened up MMC and went to the
 CurrentUser\Trusted Root Certification Authorities store and I imported mytestRootCA.cer file into that store

Then I made a signing certificate from that CA.
makecert -sk testSigning -iv testRootCA.pvk -n "CN=testSigning" -ic testRootCA.cer testSigning.cer -sr currentuser -ss My

And that command line is installing that certificate into the personal store and it should be trusted because it chains up to the testRootCA.  
I also needed to make sure that my signing certificate is also in my CurrentUser\Trusted Publishers store so I went back to MMC and import that certificate into that store (my file is called testSigning.cer).

Signing my Xap file with the new cert
From VS 2010 - Went to the Silverlight project properties and on the Signing area clicked on Select from Store and picked my certificate that was just created

Registry setting changes on client side
    • 64 bit path: HKLM\Software\Wow6432Node\Microsoft\Silverlight
    • 32 bit path: HKLM\Software\Microsoft\Silverlight
    • AllowElevatedTrustAppsInBrowser  (DWord) – 0x00000001
    • AllowLaunchOfElevatedTrustApps (DWord) – 0x00000001