User-Mode Code-Signing Requirements

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User-Mode Code-Signing Requirements

PUMA is the new user-mode audio engine in the Windows Vista PE. It provides a safe environment for audio playback and also checks that the enabled outputs are consistent with what the content allows. To be loaded in the PMP PE and process premium content, all user-mode binaries—including codecs, media sources, and media sinks—must be signed with a PE attribute.

Currently, the following signing methods are accepted for user-mode modules:

Signed by WHQL.

If the package that is submitted to WHQL includes a Windows Display Driver Model (WDDM) driver and a related user-mode component, WHQL signs the package with a PE attribute.
If the package that is submitted to WHQL falls into the audio classification program, WHQL signs the package with both PE and DRM attributes.

Signed by the vendor, by using a PMP-PE certificate, obtained from Microsoft. For information on this certificate, see "How to Obtain Certificates" later in this paper.

Note: If your component processes only unprotected content—for example, WAV decoding—and the processing is done outside the PE, a PMP-PE certificate is not required.

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