DRM: ECCP with dashif:Laurl and multiple keys

[dsilhavy]

A short description of the use case for the new test content.

This test content is supposed to demonstrate the Enhanced Clearkey Protection (ECCP) mechanism. In this case we are using a multiple keys for audio and video AdaptationSets.

Test content requirements

General description and requirements

• A single period MPD
• One video and one audio AdaptationSets.
• The content shall be encrypted with Clearkey and the cbcs encryption scheme.
• Both AdaptationSets use different cenc:default_KID values and are consequently encrypted with different keys
• Both AdaptationSets define dashif:Laurl
• The server component linked in dashif:Laurl should return the valid keys. As an example:
  • Request: {"kids":["kid1", "kid2"]],"type":"temporary"}
  • Response: {"keys":[{"kty":"oct","k":"key1","kid":"kid1"}, {"kty":"oct","k":"key2","kid":"kid2"}],"type":"temporary"}

DASH-IF documents and links

• DASH-IF Interoperability Points; Part 6: Content Protection
• Clear key license format: https://www.w3.org/TR/encrypted-media/#clear-key-license-format

[haudiobe]

same as #9, but individual key is returned for each media type.