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[cookies] Update for chromium changes (#6897)

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Authored by: mbway
This commit is contained in:
Matt Broadway 2023-05-29 14:51:35 +01:00 committed by GitHub
parent 489f51279d
commit b38d4c941d
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2 changed files with 150 additions and 55 deletions
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18
test/test_cookies.py
View File

@ -49,32 +49,38 @@ class TestCookies(unittest.TestCase):
""" based on https://chromium.googlesource.com/chromium/src/+/refs/heads/main/base/nix/xdg_util_unittest.cc """
test_cases = [
({}, _LinuxDesktopEnvironment.OTHER),
({'DESKTOP_SESSION': 'my_custom_de'}, _LinuxDesktopEnvironment.OTHER),
({'XDG_CURRENT_DESKTOP': 'my_custom_de'}, _LinuxDesktopEnvironment.OTHER),
({'DESKTOP_SESSION': 'gnome'}, _LinuxDesktopEnvironment.GNOME),
({'DESKTOP_SESSION': 'mate'}, _LinuxDesktopEnvironment.GNOME),
({'DESKTOP_SESSION': 'kde4'}, _LinuxDesktopEnvironment.KDE),
({'DESKTOP_SESSION': 'kde'}, _LinuxDesktopEnvironment.KDE),
({'DESKTOP_SESSION': 'kde4'}, _LinuxDesktopEnvironment.KDE4),
({'DESKTOP_SESSION': 'kde'}, _LinuxDesktopEnvironment.KDE3),
({'DESKTOP_SESSION': 'xfce'}, _LinuxDesktopEnvironment.XFCE),
({'GNOME_DESKTOP_SESSION_ID': 1}, _LinuxDesktopEnvironment.GNOME),
({'KDE_FULL_SESSION': 1}, _LinuxDesktopEnvironment.KDE),
({'KDE_FULL_SESSION': 1}, _LinuxDesktopEnvironment.KDE3),
({'KDE_FULL_SESSION': 1, 'DESKTOP_SESSION': 'kde4'}, _LinuxDesktopEnvironment.KDE4),
({'XDG_CURRENT_DESKTOP': 'X-Cinnamon'}, _LinuxDesktopEnvironment.CINNAMON),
({'XDG_CURRENT_DESKTOP': 'Deepin'}, _LinuxDesktopEnvironment.DEEPIN),
({'XDG_CURRENT_DESKTOP': 'GNOME'}, _LinuxDesktopEnvironment.GNOME),
({'XDG_CURRENT_DESKTOP': 'GNOME:GNOME-Classic'}, _LinuxDesktopEnvironment.GNOME),
({'XDG_CURRENT_DESKTOP': 'GNOME : GNOME-Classic'}, _LinuxDesktopEnvironment.GNOME),
({'XDG_CURRENT_DESKTOP': 'Unity', 'DESKTOP_SESSION': 'gnome-fallback'}, _LinuxDesktopEnvironment.GNOME),
({'XDG_CURRENT_DESKTOP': 'KDE', 'KDE_SESSION_VERSION': '5'}, _LinuxDesktopEnvironment.KDE),
({'XDG_CURRENT_DESKTOP': 'KDE'}, _LinuxDesktopEnvironment.KDE),
({'XDG_CURRENT_DESKTOP': 'KDE', 'KDE_SESSION_VERSION': '5'}, _LinuxDesktopEnvironment.KDE5),
({'XDG_CURRENT_DESKTOP': 'KDE', 'KDE_SESSION_VERSION': '6'}, _LinuxDesktopEnvironment.KDE6),
({'XDG_CURRENT_DESKTOP': 'KDE'}, _LinuxDesktopEnvironment.KDE4),
({'XDG_CURRENT_DESKTOP': 'Pantheon'}, _LinuxDesktopEnvironment.PANTHEON),
({'XDG_CURRENT_DESKTOP': 'UKUI'}, _LinuxDesktopEnvironment.UKUI),
({'XDG_CURRENT_DESKTOP': 'Unity'}, _LinuxDesktopEnvironment.UNITY),
({'XDG_CURRENT_DESKTOP': 'Unity:Unity7'}, _LinuxDesktopEnvironment.UNITY),
({'XDG_CURRENT_DESKTOP': 'Unity:Unity8'}, _LinuxDesktopEnvironment.UNITY),
]
for env, expected_desktop_environment in test_cases:
self.assertEqual(_get_linux_desktop_environment(env), expected_desktop_environment)
self.assertEqual(_get_linux_desktop_environment(env, Logger()), expected_desktop_environment)
def test_chrome_cookie_decryptor_linux_derive_key(self):
key = LinuxChromeCookieDecryptor.derive_key(b'abc')

187
yt_dlp/cookies.py
View File

@ -353,7 +353,9 @@ class ChromeCookieDecryptor:
Linux:
- cookies are either v10 or v11
- v10: AES-CBC encrypted with a fixed key
- also attempts empty password if decryption fails
- v11: AES-CBC encrypted with an OS protected key (keyring)
- also attempts empty password if decryption fails
- v11 keys can be stored in various places depending on the activate desktop environment [2]
Mac:
@ -368,7 +370,7 @@ class ChromeCookieDecryptor:
Sources:
- [1] https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/
- [2] https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/key_storage_linux.cc
- [2] https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/key_storage_linux.cc
- KeyStorageLinux::CreateService
"""
@ -390,6 +392,7 @@ class LinuxChromeCookieDecryptor(ChromeCookieDecryptor):
def __init__(self, browser_keyring_name, logger, *, keyring=None):
self._logger = logger
self._v10_key = self.derive_key(b'peanuts')
self._empty_key = self.derive_key(b'')
self._cookie_counts = {'v10': 0, 'v11': 0, 'other': 0}
self._browser_keyring_name = browser_keyring_name
self._keyring = keyring
@ -402,25 +405,36 @@ class LinuxChromeCookieDecryptor(ChromeCookieDecryptor):
@staticmethod
def derive_key(password):
# values from
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_linux.cc
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_linux.cc
return pbkdf2_sha1(password, salt=b'saltysalt', iterations=1, key_length=16)
def decrypt(self, encrypted_value):
"""
following the same approach as the fix in [1]: if cookies fail to decrypt then attempt to decrypt
with an empty password. The failure detection is not the same as what chromium uses so the
results won't be perfect
References:
- [1] https://chromium.googlesource.com/chromium/src/+/bbd54702284caca1f92d656fdcadf2ccca6f4165%5E%21/
- a bugfix to try an empty password as a fallback
"""
version = encrypted_value[:3]
ciphertext = encrypted_value[3:]
if version == b'v10':
self._cookie_counts['v10'] += 1
return _decrypt_aes_cbc(ciphertext, self._v10_key, self._logger)
return _decrypt_aes_cbc_multi(ciphertext, (self._v10_key, self._empty_key), self._logger)
elif version == b'v11':
self._cookie_counts['v11'] += 1
if self._v11_key is None:
self._logger.warning('cannot decrypt v11 cookies: no key found', only_once=True)
return None
return _decrypt_aes_cbc(ciphertext, self._v11_key, self._logger)
return _decrypt_aes_cbc_multi(ciphertext, (self._v11_key, self._empty_key), self._logger)
else:
self._logger.warning(f'unknown cookie version: "{version}"', only_once=True)
self._cookie_counts['other'] += 1
return None
@ -435,7 +449,7 @@ class MacChromeCookieDecryptor(ChromeCookieDecryptor):
@staticmethod
def derive_key(password):
# values from
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_mac.mm
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_mac.mm
return pbkdf2_sha1(password, salt=b'saltysalt', iterations=1003, key_length=16)
def decrypt(self, encrypted_value):
@ -448,12 +462,12 @@ class MacChromeCookieDecryptor(ChromeCookieDecryptor):
self._logger.warning('cannot decrypt v10 cookies: no key found', only_once=True)
return None
return _decrypt_aes_cbc(ciphertext, self._v10_key, self._logger)
return _decrypt_aes_cbc_multi(ciphertext, (self._v10_key,), self._logger)
else:
self._cookie_counts['other'] += 1
# other prefixes are considered 'old data' which were stored as plaintext
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_mac.mm
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_mac.mm
return encrypted_value
@ -473,7 +487,7 @@ class WindowsChromeCookieDecryptor(ChromeCookieDecryptor):
self._logger.warning('cannot decrypt v10 cookies: no key found', only_once=True)
return None
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_win.cc
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_win.cc
# kNonceLength
nonce_length = 96 // 8
# boringssl
@ -490,7 +504,7 @@ class WindowsChromeCookieDecryptor(ChromeCookieDecryptor):
else:
self._cookie_counts['other'] += 1
# any other prefix means the data is DPAPI encrypted
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_win.cc
# https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_win.cc
return _decrypt_windows_dpapi(encrypted_value, self._logger).decode()
@ -673,27 +687,35 @@ class _LinuxDesktopEnvironment(Enum):
"""
OTHER = auto()
CINNAMON = auto()
DEEPIN = auto()
GNOME = auto()
KDE = auto()
KDE3 = auto()
KDE4 = auto()
KDE5 = auto()
KDE6 = auto()
PANTHEON = auto()
UKUI = auto()
UNITY = auto()
XFCE = auto()
LXQT = auto()
class _LinuxKeyring(Enum):
"""
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/key_storage_util_linux.h
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/key_storage_util_linux.h
SelectedLinuxBackend
"""
KWALLET = auto()
GNOMEKEYRING = auto()
BASICTEXT = auto()
KWALLET4 = auto() # this value is just called KWALLET in the chromium source but it is for KDE4 only
KWALLET5 = auto()
KWALLET6 = auto()
GNOME_KEYRING = auto()
BASIC_TEXT = auto()
SUPPORTED_KEYRINGS = _LinuxKeyring.__members__.keys()
def _get_linux_desktop_environment(env):
def _get_linux_desktop_environment(env, logger):
"""
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/base/nix/xdg_util.cc
GetDesktopEnvironment
@ -708,51 +730,97 @@ def _get_linux_desktop_environment(env):
return _LinuxDesktopEnvironment.GNOME
else:
return _LinuxDesktopEnvironment.UNITY
elif xdg_current_desktop == 'Deepin':
return _LinuxDesktopEnvironment.DEEPIN
elif xdg_current_desktop == 'GNOME':
return _LinuxDesktopEnvironment.GNOME
elif xdg_current_desktop == 'X-Cinnamon':
return _LinuxDesktopEnvironment.CINNAMON
elif xdg_current_desktop == 'KDE':
return _LinuxDesktopEnvironment.KDE
kde_version = env.get('KDE_SESSION_VERSION', None)
if kde_version == '5':
return _LinuxDesktopEnvironment.KDE5
elif kde_version == '6':
return _LinuxDesktopEnvironment.KDE6
elif kde_version == '4':
return _LinuxDesktopEnvironment.KDE4
else:
logger.info(f'unknown KDE version: "{kde_version}". Assuming KDE4')
return _LinuxDesktopEnvironment.KDE4
elif xdg_current_desktop == 'Pantheon':
return _LinuxDesktopEnvironment.PANTHEON
elif xdg_current_desktop == 'XFCE':
return _LinuxDesktopEnvironment.XFCE
elif xdg_current_desktop == 'UKUI':
return _LinuxDesktopEnvironment.UKUI
elif xdg_current_desktop == 'LXQt':
return _LinuxDesktopEnvironment.LXQT
else:
logger.info(f'XDG_CURRENT_DESKTOP is set to an unknown value: "{xdg_current_desktop}"')
elif desktop_session is not None:
if desktop_session in ('mate', 'gnome'):
if desktop_session == 'deepin':
return _LinuxDesktopEnvironment.DEEPIN
elif desktop_session in ('mate', 'gnome'):
return _LinuxDesktopEnvironment.GNOME
elif 'kde' in desktop_session:
return _LinuxDesktopEnvironment.KDE
elif 'xfce' in desktop_session:
elif desktop_session in ('kde4', 'kde-plasma'):
return _LinuxDesktopEnvironment.KDE4
elif desktop_session == 'kde':
if 'KDE_SESSION_VERSION' in env:
return _LinuxDesktopEnvironment.KDE4
else:
return _LinuxDesktopEnvironment.KDE3
elif 'xfce' in desktop_session or desktop_session == 'xubuntu':
return _LinuxDesktopEnvironment.XFCE
elif desktop_session == 'ukui':
return _LinuxDesktopEnvironment.UKUI
else:
logger.info(f'DESKTOP_SESSION is set to an unknown value: "{desktop_session}"')
else:
if 'GNOME_DESKTOP_SESSION_ID' in env:
return _LinuxDesktopEnvironment.GNOME
elif 'KDE_FULL_SESSION' in env:
return _LinuxDesktopEnvironment.KDE
if 'KDE_SESSION_VERSION' in env:
return _LinuxDesktopEnvironment.KDE4
else:
return _LinuxDesktopEnvironment.KDE3
return _LinuxDesktopEnvironment.OTHER
def _choose_linux_keyring(logger):
"""
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/key_storage_util_linux.cc
SelectBackend
SelectBackend in [1]
There is currently support for forcing chromium to use BASIC_TEXT by creating a file called
`Disable Local Encryption` [1] in the user data dir. The function to write this file (`WriteBackendUse()` [1])
does not appear to be called anywhere other than in tests, so the user would have to create this file manually
and so would be aware enough to tell yt-dlp to use the BASIC_TEXT keyring.
References:
- [1] https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/key_storage_util_linux.cc
"""
desktop_environment = _get_linux_desktop_environment(os.environ)
desktop_environment = _get_linux_desktop_environment(os.environ, logger)
logger.debug(f'detected desktop environment: {desktop_environment.name}')
if desktop_environment == _LinuxDesktopEnvironment.KDE:
linux_keyring = _LinuxKeyring.KWALLET
elif desktop_environment == _LinuxDesktopEnvironment.OTHER:
linux_keyring = _LinuxKeyring.BASICTEXT
if desktop_environment == _LinuxDesktopEnvironment.KDE4:
linux_keyring = _LinuxKeyring.KWALLET4
elif desktop_environment == _LinuxDesktopEnvironment.KDE5:
linux_keyring = _LinuxKeyring.KWALLET5
elif desktop_environment == _LinuxDesktopEnvironment.KDE6:
linux_keyring = _LinuxKeyring.KWALLET6
elif desktop_environment in (
_LinuxDesktopEnvironment.KDE3, _LinuxDesktopEnvironment.LXQT, _LinuxDesktopEnvironment.OTHER
):
linux_keyring = _LinuxKeyring.BASIC_TEXT
else:
linux_keyring = _LinuxKeyring.GNOMEKEYRING
linux_keyring = _LinuxKeyring.GNOME_KEYRING
return linux_keyring
def _get_kwallet_network_wallet(logger):
def _get_kwallet_network_wallet(keyring, logger):
""" The name of the wallet used to store network passwords.
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/kwallet_dbus.cc
https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/kwallet_dbus.cc
KWalletDBus::NetworkWallet
which does a dbus call to the following function:
https://api.kde.org/frameworks/kwallet/html/classKWallet_1_1Wallet.html
@ -760,10 +828,22 @@ def _get_kwallet_network_wallet(logger):
"""
default_wallet = 'kdewallet'
try:
if keyring == _LinuxKeyring.KWALLET4:
service_name = 'org.kde.kwalletd'
wallet_path = '/modules/kwalletd'
elif keyring == _LinuxKeyring.KWALLET5:
service_name = 'org.kde.kwalletd5'
wallet_path = '/modules/kwalletd5'
elif keyring == _LinuxKeyring.KWALLET6:
service_name = 'org.kde.kwalletd6'
wallet_path = '/modules/kwalletd6'
else:
raise ValueError(keyring)
stdout, _, returncode = Popen.run([
'dbus-send', '--session', '--print-reply=literal',
'--dest=org.kde.kwalletd5',
'/modules/kwalletd5',
f'--dest={service_name}',
wallet_path,
'org.kde.KWallet.networkWallet'
], text=True, stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
@ -778,8 +858,8 @@ def _get_kwallet_network_wallet(logger):
return default_wallet
def _get_kwallet_password(browser_keyring_name, logger):
logger.debug('using kwallet-query to obtain password from kwallet')
def _get_kwallet_password(browser_keyring_name, keyring, logger):
logger.debug(f'using kwallet-query to obtain password from {keyring.name}')
if shutil.which('kwallet-query') is None:
logger.error('kwallet-query command not found. KWallet and kwallet-query '
@ -787,7 +867,7 @@ def _get_kwallet_password(browser_keyring_name, logger):
'included in the kwallet package for your distribution')
return b''
network_wallet = _get_kwallet_network_wallet(logger)
network_wallet = _get_kwallet_network_wallet(keyring, logger)
try:
stdout, _, returncode = Popen.run([
@ -809,8 +889,9 @@ def _get_kwallet_password(browser_keyring_name, logger):
# checks hasEntry. To verify this:
# dbus-monitor "interface='org.kde.KWallet'" "type=method_return"
# while starting chrome.
# this may be a bug as the intended behaviour is to generate a random password and store
# it, but that doesn't matter here.
# this was identified as a bug later and fixed in
# https://chromium.googlesource.com/chromium/src/+/bbd54702284caca1f92d656fdcadf2ccca6f4165%5E%21/#F0
# https://chromium.googlesource.com/chromium/src/+/5463af3c39d7f5b6d11db7fbd51e38cc1974d764
return b''
else:
logger.debug('password found')
@ -848,11 +929,11 @@ def _get_linux_keyring_password(browser_keyring_name, keyring, logger):
keyring = _LinuxKeyring[keyring] if keyring else _choose_linux_keyring(logger)
logger.debug(f'Chosen keyring: {keyring.name}')
if keyring == _LinuxKeyring.KWALLET:
return _get_kwallet_password(browser_keyring_name, logger)
elif keyring == _LinuxKeyring.GNOMEKEYRING:
if keyring in (_LinuxKeyring.KWALLET4, _LinuxKeyring.KWALLET5, _LinuxKeyring.KWALLET6):
return _get_kwallet_password(browser_keyring_name, keyring, logger)
elif keyring == _LinuxKeyring.GNOME_KEYRING:
return _get_gnome_keyring_password(browser_keyring_name, logger)
elif keyring == _LinuxKeyring.BASICTEXT:
elif keyring == _LinuxKeyring.BASIC_TEXT:
# when basic text is chosen, all cookies are stored as v10 (so no keyring password is required)
return None
assert False, f'Unknown keyring {keyring}'
@ -877,6 +958,10 @@ def _get_mac_keyring_password(browser_keyring_name, logger):
def _get_windows_v10_key(browser_root, logger):
"""
References:
- [1] https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/sync/os_crypt_win.cc
"""
path = _find_most_recently_used_file(browser_root, 'Local State', logger)
if path is None:
logger.error('could not find local state file')
@ -885,11 +970,13 @@ def _get_windows_v10_key(browser_root, logger):
with open(path, encoding='utf8') as f:
data = json.load(f)
try:
# kOsCryptEncryptedKeyPrefName in [1]
base64_key = data['os_crypt']['encrypted_key']
except KeyError:
logger.error('no encrypted key in Local State')
return None
encrypted_key = base64.b64decode(base64_key)
# kDPAPIKeyPrefix in [1]
prefix = b'DPAPI'
if not encrypted_key.startswith(prefix):
logger.error('invalid key')
@ -901,13 +988,15 @@ def pbkdf2_sha1(password, salt, iterations, key_length):
return pbkdf2_hmac('sha1', password, salt, iterations, key_length)
def _decrypt_aes_cbc(ciphertext, key, logger, initialization_vector=b' ' * 16):
plaintext = unpad_pkcs7(aes_cbc_decrypt_bytes(ciphertext, key, initialization_vector))
try:
return plaintext.decode()
except UnicodeDecodeError:
logger.warning('failed to decrypt cookie (AES-CBC) because UTF-8 decoding failed. Possibly the key is wrong?', only_once=True)
return None
def _decrypt_aes_cbc_multi(ciphertext, keys, logger, initialization_vector=b' ' * 16):
for key in keys:
plaintext = unpad_pkcs7(aes_cbc_decrypt_bytes(ciphertext, key, initialization_vector))
try:
return plaintext.decode()
except UnicodeDecodeError:
pass
logger.warning('failed to decrypt cookie (AES-CBC) because UTF-8 decoding failed. Possibly the key is wrong?', only_once=True)
return None
def _decrypt_aes_gcm(ciphertext, key, nonce, authentication_tag, logger):