[gst-devel] Does GStreamer has a plan to support DRM (e.g. OMA DRM)?

[Stefan Kost]

Am 19.10.2010 07:12, schrieb Michael Smith:
> On Mon, Oct 18, 2010 at 8:37 PM, Lin, Mengdong <mengdong.lin at intel.com> wrote:
>> Many thanks for your information, Matt!
>>
>>
>>
>> We want to support OMA DRM 1.0. It protects the content by adding a
>> encryption wrapper outside the original media file. To play the media, the
>> wrapper must be removed and decryption is need to extract the original media
>> file.
>>
>>
>>
>> Is it possible to insert a DRM filter plug-in between the filesrc plug-in
>> and demuxer plug-in?  The DRM filer can remove the wrapper and do decryption
>> if need, or just let data pass through if no DRM wrapper is present.
>>
>>
>>
>> Is the following pipe possible for the playbin?
>>
>> Type finding:
>>
>> Filesrc -> DRM wrapper filter  -> typefind -> fakesink
>>
>>
>>
>> Playback:
>>
>> Filesrc -> DRM wrapper filter  -> demuxer -> decoder -> render
> 
> 
> You could certainly do that without any problem - the "DRM wrapper
> filter" would just be another normal plugin, handling a specific
> format. There's nothing special about the fact that it's DRM, in what
> you've described.
> 
> Of course, then the output of the DRM wrapper filter is the
> unencrypted original file, so a user could trivially set up a pipeline
> like filesrc ! drmremover ! filesink, and just get rid of the DRM
> permanently. This is great for the user, but probably not what you
> actually wanted.
> 
> Providing a _secure_ path for decrypt/decode/output is a much more
> complex task. You'll need to do a lot of thinking about that.
> 
> Mike
> 


Mike gave you some good pointers. You will need a way to protect the process
that further processes the unDRM'ed file. E.g. you would need platform security
that would only allow loading a subset of trusted gstreamer plugins in a process
that plays drm content.

Stefan