Wpf – An error occurred while signing

assembly-signingclickoncevisual studio 2012wpf

I maintain a large WPF application which I inherited from another developer. I use ClickOnce to publish it. Suddenly, today I got an error message:
Error 2 Cannot publish because a project failed to build. 1 1
Error 3 An error occurred while signing: Failed to sign bin\Debug\app.publish\setup.exe. SignTool Error: No certificates were found that met all the given criteria.

I do have a file called SomeName.snk, which is referred in project settings, Signing tab. I have no idea what happened today that caused the problem.
I use VS 2012.

Best Answer

Go to main project properties > Signing > If the expiration date is over > click on Create Test Certificate, password is not mandatory, and you're done.

Related Solutions

.net – ClickOnce signer’s certificate not valid for signing when using makecert/pvk2pfx

It worked for me after I specified the certificate length greater than 1024:

makecert -sv MyApp.pvk -n "CN=MyCompany" -len 2048 MyApp.cer -r
pvk2pfx -pvk MyApp.pvk -spc MyApp.cer -pfx MyApp.pfx -po MyPassword

Microsoft released an update that affects all certificates having an RSA key less than 1024 bits long.

Microsoft Security Advisory: Update for minimum certificate key length

ClickOnce Publish Signtool Error

As indicated, in the case of Windows 7 KB2661254 (code key length < 1024) is the culprit but if you are running Windows 8 you cannot uninstall the KB and you need to discover the keys with length < 1024 and fix them.

See the KB article

http://support.microsoft.com/kb/2661254

UPDATE: It turns out that it was the root certificate for the self signed cert that was 512 bits, not the actual certificate itself. I regenerated on Windows 8 and all was fine with the new cert.

Best Answer

Related Solutions

.net – ClickOnce signer’s certificate not valid for signing when using makecert/pvk2pfx

ClickOnce Publish Signtool Error

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