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Verifying the Signature of a Test-Signed Driver File

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To verify a test signature that is embedded in a driver file, use the following SignTool command:

SignTool verify /v /pa DriverFileName.sys

Where:

  • The verify command configures SignTool to verify the signature that is embedded in the driver file DriverFileName.sys.

  • The /v option configures SignTool to print the execution and warning messages.

  • The /pa option configures SignTool to verify that the signature that is embedded in DriverFileName.sys complies with the PnP device installation signing requirements.

  • DriverFileName.sys is the name of the driver file.

Be aware that the SignTool verify command does not explicitly specify the test certificate that was used to sign the driver file. For the verify operation to succeed, you must first install the test certificate in the Trusted Root Certification Authorities certificate store of the local computer that you use to verify the signature. For more information about how to install the test certificate in the Trusted Root Certification Authorities certificate store of a local computer, see Installing a Test Certificate on a Test Computer. The installation procedure is the same on both the signing computer and a test computer.

For example, the following command verifies the embedded signature in Toaster.sys, which is in the amd64 subdirectory under the directory in which the command is run.

SignTool verify /v /pa amd64\toaster.sys