[cookies] Update for chromium changes (#6897)

Authored by: mbway

test/test_cookies.py

@@ -49,32 +49,38 @@ def test_get_desktop_environment(self):
         """ 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': 'kde4'}, _LinuxDesktopEnvironment.KDE4),
-            ({'DESKTOP_SESSION': 'kde'}, _LinuxDesktopEnvironment.KDE),
+            ({'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', 'KDE_SESSION_VERSION': '5'}, _LinuxDesktopEnvironment.KDE5),
-            ({'XDG_CURRENT_DESKTOP': 'KDE'}, _LinuxDesktopEnvironment.KDE),
+            ({'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')

yt_dlp/cookies.py

@@ -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 @@ def _v11_key(self):
     @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 @@ def __init__(self, browser_keyring_name, logger):
     @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 @@ def decrypt(self, encrypted_value):
                 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 @@ def decrypt(self, encrypted_value):
                 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 @@ def decrypt(self, encrypted_value):
         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()
+    KWALLET4 = auto()  # this value is just called KWALLET in the chromium source but it is for KDE4 only
-    GNOMEKEYRING = auto()
+    KWALLET5 = auto()
-    BASICTEXT = 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:
+        elif desktop_session in ('kde4', 'kde-plasma'):
-            return _LinuxDesktopEnvironment.KDE
+            return _LinuxDesktopEnvironment.KDE4
-        elif 'xfce' in desktop_session:
+        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 in [1]
-    SelectBackend
+
+    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:
+    if desktop_environment == _LinuxDesktopEnvironment.KDE4:
-        linux_keyring = _LinuxKeyring.KWALLET
+        linux_keyring = _LinuxKeyring.KWALLET4
-    elif desktop_environment == _LinuxDesktopEnvironment.OTHER:
+    elif desktop_environment == _LinuxDesktopEnvironment.KDE5:
-        linux_keyring = _LinuxKeyring.BASICTEXT
+        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',
+            f'--dest={service_name}',
-            '/modules/kwalletd5',
+            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):
+def _get_kwallet_password(browser_keyring_name, keyring, logger):
-    logger.debug('using kwallet-query to obtain password from kwallet')
+    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
+                # this was identified as a bug later and fixed in
-                # it, but that doesn't matter here.
+                # 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:
+    if keyring in (_LinuxKeyring.KWALLET4, _LinuxKeyring.KWALLET5, _LinuxKeyring.KWALLET6):
-        return _get_kwallet_password(browser_keyring_name, logger)
+        return _get_kwallet_password(browser_keyring_name, keyring, logger)
-    elif keyring == _LinuxKeyring.GNOMEKEYRING:
+    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')
@@ -901,11 +988,13 @@ 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):
+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