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Pass save path to DRM decrypt functions directly

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This is required in segmented scenarios when multi-threaded where the same `track.path` would be get and set from possibly at the same time. It's also just better logically to do it this way.
This commit is contained in:
rlaphoenix 2023-02-21 16:09:35 +00:00
parent 8268825ba8
commit 314079c75f
5 changed files with 32 additions and 34 deletions
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5
devine/commands/dl.py
View File

@ -630,7 +630,6 @@ class dl:
service.session.headers,
proxy if track.needs_proxy else None
))
track.path = save_path
if not track.drm and isinstance(track, (Video, Audio)):
try:
@ -644,7 +643,9 @@ class dl:
if isinstance(drm, Widevine):
# license and grab content keys
prepare_drm(drm)
drm.decrypt(track)
drm.decrypt(save_path)
track.drm = None
track.path = save_path
if callable(track.OnDecrypted):
track.OnDecrypted(track)
else:

18
devine/core/drm/clearkey.py
View File

@ -1,5 +1,7 @@
from __future__ import annotations
import shutil
from pathlib import Path
from typing import Optional, Union
from urllib.parse import urljoin
@ -7,8 +9,6 @@ import requests
from Cryptodome.Cipher import AES
from m3u8.model import Key
from devine.core.constants import TrackT
class ClearKey:
"""AES Clear Key DRM System."""
@ -34,20 +34,20 @@ class ClearKey:
self.key: bytes = key
self.iv: bytes = iv
def decrypt(self, track: TrackT) -> None:
def decrypt(self, path: Path) -> None:
"""Decrypt a Track with AES Clear Key DRM."""
if not track.path or not track.path.exists():
raise ValueError("Tried to decrypt a track that has not yet been downloaded.")
if not path or not path.exists():
raise ValueError("Tried to decrypt a file that does not exist.")
decrypted = AES. \
new(self.key, AES.MODE_CBC, self.iv). \
decrypt(track.path.read_bytes())
decrypt(path.read_bytes())
decrypted_path = track.path.with_suffix(f".decrypted{track.path.suffix}")
decrypted_path = path.with_suffix(f".decrypted{path.suffix}")
decrypted_path.write_bytes(decrypted)
track.swap(decrypted_path)
track.drm = None
path.unlink()
shutil.move(decrypted_path, path)
@classmethod
def from_m3u_key(cls, m3u_key: Key, proxy: Optional[str] = None) -> ClearKey:

19
devine/core/drm/widevine.py
View File

@ -1,8 +1,10 @@
from __future__ import annotations
import base64
import shutil
import subprocess
import sys
from pathlib import Path
from typing import Any, Callable, Optional, Union
from uuid import UUID
@ -14,7 +16,7 @@ from pywidevine.pssh import PSSH
from requests import Session
from devine.core.config import config
from devine.core.constants import AnyTrack, TrackT
from devine.core.constants import AnyTrack
from devine.core.utilities import get_binary_path, get_boxes
from devine.core.utils.subprocess import ffprobe
@ -212,7 +214,7 @@ class Widevine:
finally:
cdm.close(session_id)
def decrypt(self, track: TrackT) -> None:
def decrypt(self, path: Path) -> None:
"""
Decrypt a Track with Widevine DRM.
Raises:
@ -227,15 +229,15 @@ class Widevine:
executable = get_binary_path("shaka-packager", f"packager-{platform}", f"packager-{platform}-x64")
if not executable:
raise EnvironmentError("Shaka Packager executable not found but is required.")
if not track.path or not track.path.exists():
raise ValueError("Tried to decrypt a track that has not yet been downloaded.")
if not path or not path.exists():
raise ValueError("Tried to decrypt a file that does not exist.")
decrypted_path = track.path.with_suffix(f".decrypted{track.path.suffix}")
decrypted_path = path.with_suffix(f".decrypted{path.suffix}")
config.directories.temp.mkdir(parents=True, exist_ok=True)
try:
subprocess.check_call([
executable,
f"input={track.path},stream=0,output={decrypted_path}",
f"input={path},stream=0,output={decrypted_path}",
"--enable_raw_key_decryption", "--keys",
",".join([
*[
@ -252,8 +254,9 @@ class Widevine:
], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
except subprocess.CalledProcessError as e:
raise subprocess.SubprocessError(f"Failed to Decrypt! Shaka Packager Error: {e}")
track.swap(decrypted_path)
track.drm = None
path.unlink()
shutil.move(decrypted_path, path)
class Exceptions:
class PSSHNotFound(Exception):

16
devine/core/manifests/dash.py
View File

@ -414,12 +414,9 @@ class DASH:
session.headers,
proxy
))
# TODO: More like `segment.path`, but this will do for now
# Needed for the drm.decrypt() call couple lines down
track.path = segment_save_path
if isinstance(track, Audio) or init_data:
with open(track.path, "rb+") as f:
with open(segment_save_path, "rb+") as f:
segment_data = f.read()
if isinstance(track, Audio):
# fix audio decryption on ATVP by fixing the sample description index
@ -437,7 +434,8 @@ class DASH:
if drm:
# TODO: What if the manifest does not mention DRM, but has DRM
drm.decrypt(track)
drm.decrypt(segment_save_path)
track.drm = None
if callable(track.OnDecrypted):
track.OnDecrypted(track)
elif segment_list is not None:
@ -485,12 +483,9 @@ class DASH:
proxy,
byte_range=segment_url.get("mediaRange")
))
# TODO: More like `segment.path`, but this will do for now
# Needed for the drm.decrypt() call couple lines down
track.path = segment_save_path
if isinstance(track, Audio) or init_data:
with open(track.path, "rb+") as f:
with open(segment_save_path, "rb+") as f:
segment_data = f.read()
if isinstance(track, Audio):
# fix audio decryption on ATVP by fixing the sample description index
@ -508,7 +503,8 @@ class DASH:
if drm:
# TODO: What if the manifest does not mention DRM, but has DRM
drm.decrypt(track)
drm.decrypt(segment_save_path)
track.drm = None
if callable(track.OnDecrypted):
track.OnDecrypted(track)
elif segment_base is not None or base_url:

8
devine/core/manifests/hls.py
View File

@ -269,12 +269,9 @@ class HLS:
session.headers,
proxy
))
# TODO: More like `segment.path`, but this will do for now
# Needed for the drm.decrypt() call couple lines down
track.path = segment_save_path
if isinstance(track, Audio) or init_data:
with open(track.path, "rb+") as f:
with open(segment_save_path, "rb+") as f:
segment_data = f.read()
if isinstance(track, Audio):
# fix audio decryption on ATVP by fixing the sample description index
@ -291,7 +288,8 @@ class HLS:
f.write(segment_data)
if last_segment_key[0]:
last_segment_key[0].decrypt(track)
last_segment_key[0].decrypt(segment_save_path)
track.drm = None
if callable(track.OnDecrypted):
track.OnDecrypted(track)