TypeError: Cannot read properties of null (reading 'license') when trying to use DRMToday licenses

[tomraut]

Environment

• The MPD passes the DASH-IF Conformance Tool on https://conformance.dashif.org/
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream
• The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page

• Link to playable MPD file: https://ovpuspvod.a2d-stage.tv/16062866-7a02-4aa9-8dc7-4cd48fc66c9f/e58a6e60-ed3f-11ec-b3fa-4ba2bb9a9513_411.ism/.mpd
• Dash.js version: latest but also 4.3.0
• Browser name/version: Chrome 102
• OS name/version: Mac OS Monterey

Steps to reproduce

Try to start stream https://ovpuspvod.a2d-stage.tv/16062866-7a02-4aa9-8dc7-4cd48fc66c9f/e58a6e60-ed3f-11ec-b3fa-4ba2bb9a9513_411.ism/.mpd using reference player. For DRM options, toggle Widevine and use this as license URL: https://lic.staging.drmtoday.com/license-proxy-widevine/cenc/?specConform=true&assetId=tvmedia-staging-411 and remember also to toggle "DRM Today". Please also add additional header to the request which is "dt-custom-data: eyJ1c2VySWQiOiJyZW50YWwxIiwic2Vzc2lvbklkIjoiY2FsbGV0ZXN0MiIsIm1lcmNoYW50IjoiYTJkIn0="

Observed behavior

Player starts to load and it receives HTTP 200 response from the license request but error occurs and following is logged to console:

Console output

[125572][ProtectionController] DRM: initData: ����pssh����íï�©yÖJΣÈ'ÜÕ�!í���e����	Or>¢l9��;¤áÄ�ßÜ��castlabs"<eyJhc3NldElkIjoiZXUtbm9ydGgtMS1wcmVwcm9kLXR2bWVkaWEtNDExIn0=2�default���Xpssh������ðy�@B�«�æ[à�_����88�������.�<�W�R�M�H�E�A�D�E�R� �x�m�l�n�s�=�"�h�t�t�p�:�/�/�s�c�h�e�m�a�s�.�m�i�c�r�o�s�o�f�t�.�c�o�m�/�D�R�M�/�2�0�0�7�/�0�3�/�P�l�a�y�R�e�a�d�y�H�e�a�d�e�r�"� �v�e�r�s�i�o�n�=�"�4�.�0�.�0�.�0�"�>�<�D�A�T�A�>�<�P�R�O�T�E�C�T�I�N�F�O�>�<�K�E�Y�L�E�N�>�1�6�<�/�K�E�Y�L�E�N�>�<�A�L�G�I�D�>�A�E�S�C�T�R�<�/�A�L�G�I�D�>�<�/�P�R�O�T�E�C�T�I�N�F�O�>�<�K�I�D�>�P�n�J�P�C�W�y�i�m�T�m�B�O�6�T�h�x�J�z�f�3�A�=�=�<�/�K�I�D�>�<�L�A�_�U�R�L�>�h�t�t�p�s�:�/�/�l�i�c�.�s�t�a�g�i�n�g�.�d�r�m�t�o�d�a�y�.�c�o�m�/�l�i�c�e�n�s�e�-�p�r�o�x�y�-�h�e�a�d�e�r�a�u�t�h�/�d�r�m�t�o�d�a�y�/�R�i�g�h�t�s�M�a�n�a�g�e�r�.�a�s�m�x�<�/�L�A�_�U�R�L�>�<�L�U�I�_�U�R�L�>�h�t�t�p�s�:�/�/�p�l�a�y�r�e�a�d�y�-�u�i�.�e�x�a�m�p�l�e�.�c�o�m�<�/�L�U�I�_�U�R�L�>�<�C�H�E�C�K�S�U�M�>�z�V�Z�E�P�V�N�c�C�I�0�=�<�/�C�H�E�C�K�S�U�M�>�<�/�D�A�T�A�>�<�/�W�R�M�H�E�A�D�E�R�>����³pssh����=^m5��Aè¸CÝ<nrÄ,����{"version":"V1.0","kids":["CU9yPqJsOZmBO6ThxJzf3A=="],"contentID":"eyJhc3NldElkIjoiZXUtbm9ydGgtMS1wcmVwcm9kLXR2bWVkaWEtNDExIn0=","enschema":"cenc"} 
...
dash.all.debug.js:57752 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'license')
    at Object.getLicenseMessage (dash.all.debug.js:57752:42)
    at Object.getLicenseMessage (dash.all.debug.js:57797:37)
    at dash.all.debug.js:54329:50
getLicenseMessage @ dash.all.debug.js:57752
getLicenseMessage @ dash.all.debug.js:57797
(anonymous) @ dash.all.debug.js:54329
Promise.then (async)
onLoad @ dash.all.debug.js:54328
xhr.onload @ dash.all.debug.js:54441
load (async)
_doLicenseRequest @ dash.all.debug.js:54437
(anonymous) @ dash.all.debug.js:54362
Promise.then (async)
_issueLicenseRequest @ dash.all.debug.js:54361
_onKeyMessage @ dash.all.debug.js:54252
(anonymous) @ dash.all.debug.js:18171
trigger @ dash.all.debug.js:18170
handleEvent @ dash.all.debug.js:57064
dash.all.debug.js:18001 

Expected behavior

License request should success and playback should start.

@dsilhavy can you please take a look at this? I'm wondering why DRM initData refers to PlayReady in this case and not Widevine..?

[dsilhavy]

The format of your license response looks different from what we implemented against in #3711

In this case they respond with:

{
  "status": "OK",
  "status_message": "",
  "license": "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",
  "license_metadata": {
    "content_id": "ZXlKaGMzTmxkRWxrSWpvaVpXMXdjbVZtWlhOMGNtVmhiU0o5",
    "license_type": "STREAMING",
    "request_type": "NEW"
  },
  "supported_tracks": [
    {
      "type": "HD",
      "key_id": "6c2dLmi5TTSRCDaBC8zJwg=="
    },
    {
      "type": "HD",
      "key_id": "SUDYf9F/Rz6eex01ctefOg=="
    },
    {
      "type": "HD",
      "key_id": "YMjSd+85QgyB4Sz0gsUJ0Q=="
    }
  ],
  "make": "Google",
  "model": "ChromeCDM-Mac-x64-7",
  "security_level": 3,
  "internal_status": 0,
  "session_state": {
    "license_id": {
      "request_id": "o/TowglF6Lb3AHxL8FpvUg==",
      "session_id": "o/TowglF6Lb3AHxL8FpvUg==",
      "purchase_id": "",
      "type": "STREAMING",
      "version": 0,
      "original_rental_duration_seconds": 0,
      "original_playback_duration_seconds": 0,
      "original_start_time_seconds": 1656058557
    },
    "signing_key": "qSbZYNWws7Kpq92pui9lJ+LTxmoOzzsO5pLmQnsMQE9kgofCRWZ77ywijSQwZGdsqQsY3jBLX3d3SozPjcX1zg==",
    "keybox_system_id": 21891,
    "license_counter": 0
  },
  "drm_cert_serial_number": "YTIxOWI0MmE2ZDY2Yjc2ZDM3YjY4OWU0MTI0OTE2OWEwYQ==",
  "device_whitelist_state": "DEVICE_NOT_WHITELISTED",
  "message_type": "LICENSE",
  "platform": "macos",
  "device_state": "RELEASED",
  "pssh_data": {
    "key_id": [
      "SUDYf9F/Rz6eex01ctefOg=="
    ],
    "content_id": "ZXlKaGMzTmxkRWxrSWpvaVpXMXdjbVZtWlhOMGNtVmhiU0o5"
  },
  "client_max_hdcp_version": "HDCP_NONE",
  "client_info": [
    {
      "name": "architecture_name",
      "value": "x86-64"
    },
    {
      "name": "company_name",
      "value": "Google"
    },
    {
      "name": "model_name",
      "value": "ChromeCDM"
    },
    {
      "name": "platform_name",
      "value": "MacOSX"
    },
    {
      "name": "widevine_cdm_version",
      "value": "4.10.2449.0"
    }
  ],
  "is_live": true,
  "platform_verification_status": "PLATFORM_SECURE_STORAGE_SOFTWARE_VERIFIED",
  "content_owner": "castlabs",
  "content_provider": "castlabs",
  "system_id": 21891,
  "oem_crypto_api_version": 16,
  "resource_rating_tier": 0,
  "service_version_info": {
    "license_sdk_version": "16.5.0 Built on Dec 15 2021 10:27:17 (1639592815)",
    "license_service_version": "widevine_license_wls_20211215_101655-RC00"
  },
  "soc": "x64",
  "client_capabilities": {
    "session_token": true,
    "video_resolution_constraints": true,
    "supported_key_type": []
  }
}

[tomraut]

@dsilhavy can you elaborate on what kind of a response you had implemented against then?

[dsilhavy]

Example can be found in the ticket mentioned above #3711

[tomraut]

Got this working now, thanks for your assistance @dsilhavy !