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FairPlay HLS (SAMPLE-AES/cbcs) ships a content KID in its skd:// key but no PlayReady/Widevine PSSH. Synthesize a PlayReady header from that KID so a PlayReady CDM can license and decrypt it whenever the backend is multi-DRM. - FairPlay DRM (PlayReady subclass) + FairPlay.from_kid; fairplay_kid_from_skd extracts the KID from GUID / ?KID= / 32-hex skd forms (core/drm/fairplay.py) - build_pr_header_from_kid synthesizes a WRMHEADER/PRO (cbcs->AESCBC v4.3, cenc->AESCTR v4.0); PlayReady.from_track falls back to a tenc KID when no PSSH - Service.get_fairplay_license hook (defaults to get_playready_license) - dl.py routes FairPlay tracks to get_fairplay_license through the PlayReady CDM - EXAMPLE service + config.yaml document the bridge end to end - tests for the synthesized header and skd KID extraction
59 lines
2.0 KiB
Python
59 lines
2.0 KiB
Python
"""Tests for the FairPlay->PlayReady KID bridge.
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FairPlay/cbcs HLS ships a tenc DEFAULT_KID but no PlayReady/Widevine PSSH.
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``build_pr_header_from_kid`` synthesizes a PlayReady Object (PRO) from that bare
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KID so a PlayReady license can be requested keyed on it. These pins ensure the
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synthesized header parses back through pyplayready and yields the same KID.
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"""
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from __future__ import annotations
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from uuid import UUID
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import pytest
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from pyplayready.system.pssh import PSSH
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from unshackle.core.drm.playready import PlayReady, build_pr_header_from_kid
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@pytest.mark.parametrize(
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"kid",
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[
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UUID("279926a3-d9b9-4b6f-8b2c-1a2b3c4d5e6f"),
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UUID("00000000-0000-0000-0000-000000000001"),
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UUID("ffffffff-ffff-ffff-ffff-ffffffffffff"),
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],
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)
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def test_synth_header_parses_and_round_trips_kid(kid: UUID) -> None:
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pssh_b64 = build_pr_header_from_kid(kid)
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# pyplayready parses the synthesized PRO as a single WRMHEADER record.
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parsed = PSSH(pssh_b64)
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assert len(parsed.wrm_headers) == 1
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# PlayReady DRM object recovers the original KID from the synthesized header.
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drm = PlayReady(pssh=parsed, pssh_b64=pssh_b64)
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assert [k.hex for k in drm.kids] == [kid.hex]
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def test_synth_header_is_v4_0_aesctr() -> None:
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import base64
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pssh_b64 = build_pr_header_from_kid(UUID("279926a3-d9b9-4b6f-8b2c-1a2b3c4d5e6f"))
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xml = base64.b64decode(pssh_b64).decode("utf-16-le", errors="ignore")
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assert "PlayReadyHeader" in xml
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assert 'version="4.0.0.0"' in xml
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assert "<ALGID>AESCTR</ALGID>" in xml
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def test_cbcs_header_v4_3_round_trips_kid() -> None:
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kid = UUID("279926a3-d9b9-4b6f-8b2c-1a2b3c4d5e6f")
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pssh_b64 = build_pr_header_from_kid(kid, scheme="cbcs", version="4.3")
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drm = PlayReady(pssh=PSSH(pssh_b64), pssh_b64=pssh_b64)
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assert [k.hex for k in drm.kids] == [kid.hex]
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def test_cbcs_requires_v4_3() -> None:
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with pytest.raises(ValueError, match="4.3"):
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build_pr_header_from_kid(UUID(int=1), scheme="cbcs", version="4.0")
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