import ctypes import json import os import shutil import struct import subprocess import sys import tempfile from datetime import datetime, timedelta, timezone from hashlib import pbkdf2_hmac from yt_dlp.aes import aes_cbc_decrypt from yt_dlp.compat import ( compat_b64decode, compat_cookiejar_Cookie, ) from yt_dlp.utils import ( bug_reports_message, bytes_to_intlist, expand_path, intlist_to_bytes, process_communicate_or_kill, YoutubeDLCookieJar, ) try: import sqlite3 SQLITE_AVAILABLE = True except ImportError: # although sqlite3 is part of the standard library, it is possible to compile python without # sqlite support. See: https://github.com/yt-dlp/yt-dlp/issues/544 SQLITE_AVAILABLE = False try: from Crypto.Cipher import AES CRYPTO_AVAILABLE = True except ImportError: CRYPTO_AVAILABLE = False try: import keyring KEYRING_AVAILABLE = True KEYRING_UNAVAILABLE_REASON = f'due to unknown reasons{bug_reports_message()}' except ImportError: KEYRING_AVAILABLE = False KEYRING_UNAVAILABLE_REASON = ( 'as the `keyring` module is not installed. ' 'Please install by running `python3 -m pip install keyring`. ' 'Depending on your platform, additional packages may be required ' 'to access the keyring; see https://pypi.org/project/keyring') except Exception as _err: KEYRING_AVAILABLE = False KEYRING_UNAVAILABLE_REASON = 'as the `keyring` module could not be initialized: %s' % _err CHROMIUM_BASED_BROWSERS = {'brave', 'chrome', 'chromium', 'edge', 'opera', 'vivaldi'} SUPPORTED_BROWSERS = CHROMIUM_BASED_BROWSERS | {'firefox', 'safari'} class YDLLogger: def __init__(self, ydl=None): self._ydl = ydl def debug(self, message): if self._ydl: self._ydl.write_debug(message) def info(self, message): if self._ydl: self._ydl.to_screen(f'[Cookies] {message}') def warning(self, message, only_once=False): if self._ydl: self._ydl.report_warning(message, only_once) def error(self, message): if self._ydl: self._ydl.report_error(message) def load_cookies(cookie_file, browser_specification, ydl): cookie_jars = [] if browser_specification is not None: browser_name, profile = _parse_browser_specification(*browser_specification) cookie_jars.append(extract_cookies_from_browser(browser_name, profile, YDLLogger(ydl))) if cookie_file is not None: cookie_file = expand_path(cookie_file) jar = YoutubeDLCookieJar(cookie_file) if os.access(cookie_file, os.R_OK): jar.load(ignore_discard=True, ignore_expires=True) cookie_jars.append(jar) return _merge_cookie_jars(cookie_jars) def extract_cookies_from_browser(browser_name, profile=None, logger=YDLLogger()): if browser_name == 'firefox': return _extract_firefox_cookies(profile, logger) elif browser_name == 'safari': return _extract_safari_cookies(profile, logger) elif browser_name in CHROMIUM_BASED_BROWSERS: return _extract_chrome_cookies(browser_name, profile, logger) else: raise ValueError('unknown browser: {}'.format(browser_name)) def _extract_firefox_cookies(profile, logger): logger.info('Extracting cookies from firefox') if not SQLITE_AVAILABLE: logger.warning('Cannot extract cookies from firefox without sqlite3 support. ' 'Please use a python interpreter compiled with sqlite3 support') return YoutubeDLCookieJar() if profile is None: search_root = _firefox_browser_dir() elif _is_path(profile): search_root = profile else: search_root = os.path.join(_firefox_browser_dir(), profile) cookie_database_path = _find_most_recently_used_file(search_root, 'cookies.sqlite') if cookie_database_path is None: raise FileNotFoundError('could not find firefox cookies database in {}'.format(search_root)) logger.debug('Extracting cookies from: "{}"'.format(cookie_database_path)) with tempfile.TemporaryDirectory(prefix='youtube_dl') as tmpdir: cursor = None try: cursor = _open_database_copy(cookie_database_path, tmpdir) cursor.execute('SELECT host, name, value, path, expiry, isSecure FROM moz_cookies') jar = YoutubeDLCookieJar() for host, name, value, path, expiry, is_secure in cursor.fetchall(): cookie = compat_cookiejar_Cookie( version=0, name=name, value=value, port=None, port_specified=False, domain=host, domain_specified=bool(host), domain_initial_dot=host.startswith('.'), path=path, path_specified=bool(path), secure=is_secure, expires=expiry, discard=False, comment=None, comment_url=None, rest={}) jar.set_cookie(cookie) logger.info('Extracted {} cookies from firefox'.format(len(jar))) return jar finally: if cursor is not None: cursor.connection.close() def _firefox_browser_dir(): if sys.platform in ('linux', 'linux2'): return os.path.expanduser('~/.mozilla/firefox') elif sys.platform == 'win32': return os.path.expandvars(r'%APPDATA%\Mozilla\Firefox\Profiles') elif sys.platform == 'darwin': return os.path.expanduser('~/Library/Application Support/Firefox') else: raise ValueError('unsupported platform: {}'.format(sys.platform)) def _get_chromium_based_browser_settings(browser_name): # https://chromium.googlesource.com/chromium/src/+/HEAD/docs/user_data_dir.md if sys.platform in ('linux', 'linux2'): config = _config_home() browser_dir = { 'brave': os.path.join(config, 'BraveSoftware/Brave-Browser'), 'chrome': os.path.join(config, 'google-chrome'), 'chromium': os.path.join(config, 'chromium'), 'edge': os.path.join(config, 'microsoft-edge'), 'opera': os.path.join(config, 'opera'), 'vivaldi': os.path.join(config, 'vivaldi'), }[browser_name] elif sys.platform == 'win32': appdata_local = os.path.expandvars('%LOCALAPPDATA%') appdata_roaming = os.path.expandvars('%APPDATA%') browser_dir = { 'brave': os.path.join(appdata_local, r'BraveSoftware\Brave-Browser\User Data'), 'chrome': os.path.join(appdata_local, r'Google\Chrome\User Data'), 'chromium': os.path.join(appdata_local, r'Chromium\User Data'), 'edge': os.path.join(appdata_local, r'Microsoft\Edge\User Data'), 'opera': os.path.join(appdata_roaming, r'Opera Software\Opera Stable'), 'vivaldi': os.path.join(appdata_local, r'Vivaldi\User Data'), }[browser_name] elif sys.platform == 'darwin': appdata = os.path.expanduser('~/Library/Application Support') browser_dir = { 'brave': os.path.join(appdata, 'BraveSoftware/Brave-Browser'), 'chrome': os.path.join(appdata, 'Google/Chrome'), 'chromium': os.path.join(appdata, 'Chromium'), 'edge': os.path.join(appdata, 'Microsoft Edge'), 'opera': os.path.join(appdata, 'com.operasoftware.Opera'), 'vivaldi': os.path.join(appdata, 'Vivaldi'), }[browser_name] else: raise ValueError('unsupported platform: {}'.format(sys.platform)) # Linux keyring names can be determined by snooping on dbus while opening the browser in KDE: # dbus-monitor "interface='org.kde.KWallet'" "type=method_return" keyring_name = { 'brave': 'Brave', 'chrome': 'Chrome', 'chromium': 'Chromium', 'edge': 'Microsoft Edge' if sys.platform == 'darwin' else 'Chromium', 'opera': 'Opera' if sys.platform == 'darwin' else 'Chromium', 'vivaldi': 'Vivaldi' if sys.platform == 'darwin' else 'Chrome', }[browser_name] browsers_without_profiles = {'opera'} return { 'browser_dir': browser_dir, 'keyring_name': keyring_name, 'supports_profiles': browser_name not in browsers_without_profiles } def _extract_chrome_cookies(browser_name, profile, logger): logger.info('Extracting cookies from {}'.format(browser_name)) if not SQLITE_AVAILABLE: logger.warning(('Cannot extract cookies from {} without sqlite3 support. ' 'Please use a python interpreter compiled with sqlite3 support').format(browser_name)) return YoutubeDLCookieJar() config = _get_chromium_based_browser_settings(browser_name) if profile is None: search_root = config['browser_dir'] elif _is_path(profile): search_root = profile config['browser_dir'] = os.path.dirname(profile) if config['supports_profiles'] else profile else: if config['supports_profiles']: search_root = os.path.join(config['browser_dir'], profile) else: logger.error('{} does not support profiles'.format(browser_name)) search_root = config['browser_dir'] cookie_database_path = _find_most_recently_used_file(search_root, 'Cookies') if cookie_database_path is None: raise FileNotFoundError('could not find {} cookies database in "{}"'.format(browser_name, search_root)) logger.debug('Extracting cookies from: "{}"'.format(cookie_database_path)) decryptor = get_cookie_decryptor(config['browser_dir'], config['keyring_name'], logger) with tempfile.TemporaryDirectory(prefix='youtube_dl') as tmpdir: cursor = None try: cursor = _open_database_copy(cookie_database_path, tmpdir) cursor.connection.text_factory = bytes column_names = _get_column_names(cursor, 'cookies') secure_column = 'is_secure' if 'is_secure' in column_names else 'secure' cursor.execute('SELECT host_key, name, value, encrypted_value, path, ' 'expires_utc, {} FROM cookies'.format(secure_column)) jar = YoutubeDLCookieJar() failed_cookies = 0 for host_key, name, value, encrypted_value, path, expires_utc, is_secure in cursor.fetchall(): host_key = host_key.decode('utf-8') name = name.decode('utf-8') value = value.decode('utf-8') path = path.decode('utf-8') if not value and encrypted_value: value = decryptor.decrypt(encrypted_value) if value is None: failed_cookies += 1 continue cookie = compat_cookiejar_Cookie( version=0, name=name, value=value, port=None, port_specified=False, domain=host_key, domain_specified=bool(host_key), domain_initial_dot=host_key.startswith('.'), path=path, path_specified=bool(path), secure=is_secure, expires=expires_utc, discard=False, comment=None, comment_url=None, rest={}) jar.set_cookie(cookie) if failed_cookies > 0: failed_message = ' ({} could not be decrypted)'.format(failed_cookies) else: failed_message = '' logger.info('Extracted {} cookies from {}{}'.format(len(jar), browser_name, failed_message)) return jar finally: if cursor is not None: cursor.connection.close() class ChromeCookieDecryptor: """ Overview: Linux: - cookies are either v10 or v11 - v10: AES-CBC encrypted with a fixed key - v11: AES-CBC encrypted with an OS protected key (keyring) - v11 keys can be stored in various places depending on the activate desktop environment [2] Mac: - cookies are either v10 or not v10 - v10: AES-CBC encrypted with an OS protected key (keyring) and more key derivation iterations than linux - not v10: 'old data' stored as plaintext Windows: - cookies are either v10 or not v10 - v10: AES-GCM encrypted with a key which is encrypted with DPAPI - not v10: encrypted with DPAPI 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 - KeyStorageLinux::CreateService """ def decrypt(self, encrypted_value): raise NotImplementedError def get_cookie_decryptor(browser_root, browser_keyring_name, logger): if sys.platform in ('linux', 'linux2'): return LinuxChromeCookieDecryptor(browser_keyring_name, logger) elif sys.platform == 'darwin': return MacChromeCookieDecryptor(browser_keyring_name, logger) elif sys.platform == 'win32': return WindowsChromeCookieDecryptor(browser_root, logger) else: raise NotImplementedError('Chrome cookie decryption is not supported ' 'on this platform: {}'.format(sys.platform)) class LinuxChromeCookieDecryptor(ChromeCookieDecryptor): def __init__(self, browser_keyring_name, logger): self._logger = logger self._v10_key = self.derive_key(b'peanuts') if KEYRING_AVAILABLE: self._v11_key = self.derive_key(_get_linux_keyring_password(browser_keyring_name)) else: self._v11_key = None @staticmethod def derive_key(password): # values from # https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_linux.cc return pbkdf2_sha1(password, salt=b'saltysalt', iterations=1, key_length=16) def decrypt(self, encrypted_value): version = encrypted_value[:3] ciphertext = encrypted_value[3:] if version == b'v10': return _decrypt_aes_cbc(ciphertext, self._v10_key, self._logger) elif version == b'v11': if self._v11_key is None: self._logger.warning(f'cannot decrypt cookie {KEYRING_UNAVAILABLE_REASON}', only_once=True) return None return _decrypt_aes_cbc(ciphertext, self._v11_key, self._logger) else: return None class MacChromeCookieDecryptor(ChromeCookieDecryptor): def __init__(self, browser_keyring_name, logger): self._logger = logger password = _get_mac_keyring_password(browser_keyring_name) self._v10_key = None if password is None else self.derive_key(password) @staticmethod def derive_key(password): # values from # https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_mac.mm return pbkdf2_sha1(password, salt=b'saltysalt', iterations=1003, key_length=16) def decrypt(self, encrypted_value): version = encrypted_value[:3] ciphertext = encrypted_value[3:] if version == b'v10': if self._v10_key is None: 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) else: # 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 return encrypted_value class WindowsChromeCookieDecryptor(ChromeCookieDecryptor): def __init__(self, browser_root, logger): self._logger = logger self._v10_key = _get_windows_v10_key(browser_root, logger) def decrypt(self, encrypted_value): version = encrypted_value[:3] ciphertext = encrypted_value[3:] if version == b'v10': if self._v10_key is None: self._logger.warning('cannot decrypt v10 cookies: no key found', only_once=True) return None elif not CRYPTO_AVAILABLE: self._logger.warning('cannot decrypt cookie as the `pycryptodome` module is not installed. ' 'Please install by running `python3 -m pip install pycryptodome`', only_once=True) return None # https://chromium.googlesource.com/chromium/src/+/refs/heads/main/components/os_crypt/os_crypt_win.cc # kNonceLength nonce_length = 96 // 8 # boringssl # EVP_AEAD_AES_GCM_TAG_LEN authentication_tag_length = 16 raw_ciphertext = ciphertext nonce = raw_ciphertext[:nonce_length] ciphertext = raw_ciphertext[nonce_length:-authentication_tag_length] authentication_tag = raw_ciphertext[-authentication_tag_length:] return _decrypt_aes_gcm(ciphertext, self._v10_key, nonce, authentication_tag, self._logger) else: # 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 return _decrypt_windows_dpapi(encrypted_value, self._logger).decode('utf-8') def _extract_safari_cookies(profile, logger): if profile is not None: logger.error('safari does not support profiles') if sys.platform != 'darwin': raise ValueError('unsupported platform: {}'.format(sys.platform)) cookies_path = os.path.expanduser('~/Library/Cookies/Cookies.binarycookies') if not os.path.isfile(cookies_path): raise FileNotFoundError('could not find safari cookies database') with open(cookies_path, 'rb') as f: cookies_data = f.read() jar = parse_safari_cookies(cookies_data, logger=logger) logger.info('Extracted {} cookies from safari'.format(len(jar))) return jar class ParserError(Exception): pass class DataParser: def __init__(self, data, logger): self._data = data self.cursor = 0 self._logger = logger def read_bytes(self, num_bytes): if num_bytes < 0: raise ParserError('invalid read of {} bytes'.format(num_bytes)) end = self.cursor + num_bytes if end > len(self._data): raise ParserError('reached end of input') data = self._data[self.cursor:end] self.cursor = end return data def expect_bytes(self, expected_value, message): value = self.read_bytes(len(expected_value)) if value != expected_value: raise ParserError('unexpected value: {} != {} ({})'.format(value, expected_value, message)) def read_uint(self, big_endian=False): data_format = '>I' if big_endian else ' 0: self._logger.debug('skipping {} bytes ({}): {}'.format( num_bytes, description, self.read_bytes(num_bytes))) elif num_bytes < 0: raise ParserError('invalid skip of {} bytes'.format(num_bytes)) def skip_to(self, offset, description='unknown'): self.skip(offset - self.cursor, description) def skip_to_end(self, description='unknown'): self.skip_to(len(self._data), description) def _mac_absolute_time_to_posix(timestamp): return int((datetime(2001, 1, 1, 0, 0, tzinfo=timezone.utc) + timedelta(seconds=timestamp)).timestamp()) def _parse_safari_cookies_header(data, logger): p = DataParser(data, logger) p.expect_bytes(b'cook', 'database signature') number_of_pages = p.read_uint(big_endian=True) page_sizes = [p.read_uint(big_endian=True) for _ in range(number_of_pages)] return page_sizes, p.cursor def _parse_safari_cookies_page(data, jar, logger): p = DataParser(data, logger) p.expect_bytes(b'\x00\x00\x01\x00', 'page signature') number_of_cookies = p.read_uint() record_offsets = [p.read_uint() for _ in range(number_of_cookies)] if number_of_cookies == 0: logger.debug('a cookies page of size {} has no cookies'.format(len(data))) return p.skip_to(record_offsets[0], 'unknown page header field') for record_offset in record_offsets: p.skip_to(record_offset, 'space between records') record_length = _parse_safari_cookies_record(data[record_offset:], jar, logger) p.read_bytes(record_length) p.skip_to_end('space in between pages') def _parse_safari_cookies_record(data, jar, logger): p = DataParser(data, logger) record_size = p.read_uint() p.skip(4, 'unknown record field 1') flags = p.read_uint() is_secure = bool(flags & 0x0001) p.skip(4, 'unknown record field 2') domain_offset = p.read_uint() name_offset = p.read_uint() path_offset = p.read_uint() value_offset = p.read_uint() p.skip(8, 'unknown record field 3') expiration_date = _mac_absolute_time_to_posix(p.read_double()) _creation_date = _mac_absolute_time_to_posix(p.read_double()) # noqa: F841 try: p.skip_to(domain_offset) domain = p.read_cstring() p.skip_to(name_offset) name = p.read_cstring() p.skip_to(path_offset) path = p.read_cstring() p.skip_to(value_offset) value = p.read_cstring() except UnicodeDecodeError: logger.warning('failed to parse cookie because UTF-8 decoding failed', only_once=True) return record_size p.skip_to(record_size, 'space at the end of the record') cookie = compat_cookiejar_Cookie( version=0, name=name, value=value, port=None, port_specified=False, domain=domain, domain_specified=bool(domain), domain_initial_dot=domain.startswith('.'), path=path, path_specified=bool(path), secure=is_secure, expires=expiration_date, discard=False, comment=None, comment_url=None, rest={}) jar.set_cookie(cookie) return record_size def parse_safari_cookies(data, jar=None, logger=YDLLogger()): """ References: - https://github.com/libyal/dtformats/blob/main/documentation/Safari%20Cookies.asciidoc - this data appears to be out of date but the important parts of the database structure is the same - there are a few bytes here and there which are skipped during parsing """ if jar is None: jar = YoutubeDLCookieJar() page_sizes, body_start = _parse_safari_cookies_header(data, logger) p = DataParser(data[body_start:], logger) for page_size in page_sizes: _parse_safari_cookies_page(p.read_bytes(page_size), jar, logger) p.skip_to_end('footer') return jar def _get_linux_keyring_password(browser_keyring_name): password = keyring.get_password('{} Keys'.format(browser_keyring_name), '{} Safe Storage'.format(browser_keyring_name)) if password is None: # this sometimes occurs in KDE because chrome does not check hasEntry and instead # just tries to read the value (which kwallet returns "") whereas keyring 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. password = '' return password.encode('utf-8') def _get_mac_keyring_password(browser_keyring_name): if KEYRING_AVAILABLE: password = keyring.get_password('{} Safe Storage'.format(browser_keyring_name), browser_keyring_name) return password.encode('utf-8') else: proc = subprocess.Popen(['security', 'find-generic-password', '-w', # write password to stdout '-a', browser_keyring_name, # match 'account' '-s', '{} Safe Storage'.format(browser_keyring_name)], # match 'service' stdout=subprocess.PIPE, stderr=subprocess.DEVNULL) try: stdout, stderr = process_communicate_or_kill(proc) return stdout except BaseException: return None def _get_windows_v10_key(browser_root, logger): path = _find_most_recently_used_file(browser_root, 'Local State') if path is None: logger.error('could not find local state file') return None with open(path, 'r') as f: data = json.load(f) try: base64_key = data['os_crypt']['encrypted_key'] except KeyError: logger.error('no encrypted key in Local State') return None encrypted_key = compat_b64decode(base64_key) prefix = b'DPAPI' if not encrypted_key.startswith(prefix): logger.error('invalid key') return None return _decrypt_windows_dpapi(encrypted_key[len(prefix):], logger) 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 = aes_cbc_decrypt(bytes_to_intlist(ciphertext), bytes_to_intlist(key), bytes_to_intlist(initialization_vector)) padding_length = plaintext[-1] try: return intlist_to_bytes(plaintext[:-padding_length]).decode('utf-8') except UnicodeDecodeError: logger.warning('failed to decrypt cookie 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): cipher = AES.new(key, AES.MODE_GCM, nonce) try: plaintext = cipher.decrypt_and_verify(ciphertext, authentication_tag) except ValueError: logger.warning('failed to decrypt cookie because the MAC check failed. Possibly the key is wrong?', only_once=True) return None try: return plaintext.decode('utf-8') except UnicodeDecodeError: logger.warning('failed to decrypt cookie because UTF-8 decoding failed. Possibly the key is wrong?', only_once=True) return None def _decrypt_windows_dpapi(ciphertext, logger): """ References: - https://docs.microsoft.com/en-us/windows/win32/api/dpapi/nf-dpapi-cryptunprotectdata """ from ctypes.wintypes import DWORD class DATA_BLOB(ctypes.Structure): _fields_ = [('cbData', DWORD), ('pbData', ctypes.POINTER(ctypes.c_char))] buffer = ctypes.create_string_buffer(ciphertext) blob_in = DATA_BLOB(ctypes.sizeof(buffer), buffer) blob_out = DATA_BLOB() ret = ctypes.windll.crypt32.CryptUnprotectData( ctypes.byref(blob_in), # pDataIn None, # ppszDataDescr: human readable description of pDataIn None, # pOptionalEntropy: salt? None, # pvReserved: must be NULL None, # pPromptStruct: information about prompts to display 0, # dwFlags ctypes.byref(blob_out) # pDataOut ) if not ret: logger.warning('failed to decrypt with DPAPI', only_once=True) return None result = ctypes.string_at(blob_out.pbData, blob_out.cbData) ctypes.windll.kernel32.LocalFree(blob_out.pbData) return result def _config_home(): return os.environ.get('XDG_CONFIG_HOME', os.path.expanduser('~/.config')) def _open_database_copy(database_path, tmpdir): # cannot open sqlite databases if they are already in use (e.g. by the browser) database_copy_path = os.path.join(tmpdir, 'temporary.sqlite') shutil.copy(database_path, database_copy_path) conn = sqlite3.connect(database_copy_path) return conn.cursor() def _get_column_names(cursor, table_name): table_info = cursor.execute('PRAGMA table_info({})'.format(table_name)).fetchall() return [row[1].decode('utf-8') for row in table_info] def _find_most_recently_used_file(root, filename): # if there are multiple browser profiles, take the most recently used one paths = [] for root, dirs, files in os.walk(root): for file in files: if file == filename: paths.append(os.path.join(root, file)) return None if not paths else max(paths, key=lambda path: os.lstat(path).st_mtime) def _merge_cookie_jars(jars): output_jar = YoutubeDLCookieJar() for jar in jars: for cookie in jar: output_jar.set_cookie(cookie) if jar.filename is not None: output_jar.filename = jar.filename return output_jar def _is_path(value): return os.path.sep in value def _parse_browser_specification(browser_name, profile=None): if browser_name not in SUPPORTED_BROWSERS: raise ValueError(f'unsupported browser: "{browser_name}"') if profile is not None and _is_path(profile): profile = os.path.expanduser(profile) return browser_name, profile