How to detect DRM information from a DRM media

For WMDRM v9 read the contents from "extended content encryption
header" in asf header. I'm not sure of which API you are talking about
but I actually parse the ASF headers.

To get an insight of all the headers, install "ASF Viewer" from
Microsoft. It shows all the headers including the data, index sections.

-kondal
Jiadong wrote:

How to detect DRM information, such as the URL of Rights Issuer, from a DRM
file ?

Is there any public tool used for read DRM properties from a DRM file?

or any API can read such information?

Appreciate for any suggestion!

Thanks,
Jiadong