# Copyright European Organization for Nuclear Research (CERN) since 2012 # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. ''' Client class for callers of the Rucio system ''' import errno import getpass import os import secrets import sys import time from collections.abc import Generator from configparser import NoOptionError, NoSectionError from logging import Logger from os import environ, fdopen, geteuid, makedirs, path from shutil import move from tempfile import mkstemp from typing import Any, Optional from urllib.parse import urlparse import requests from dogpile.cache import make_region from requests import Response, Session from requests.exceptions import ConnectionError from requests.status_codes import codes from rucio import version from rucio.common import exception from rucio.common.config import config_get, config_get_bool, config_get_int from rucio.common.exception import CannotAuthenticate, ClientProtocolNotSupported, ConfigNotFound, MissingClientParameter, MissingModuleException, NoAuthInformation, ServerConnectionException from rucio.common.extra import import_extras from rucio.common.utils import build_url, get_tmp_dir, my_key_generator, parse_response, setup_logger, ssh_sign EXTRA_MODULES = import_extras(['requests_kerberos']) if EXTRA_MODULES['requests_kerberos']: from requests_kerberos import HTTPKerberosAuth # pylint: disable=import-error LOG = setup_logger(module_name=__name__) REGION = make_region(function_key_generator=my_key_generator).configure( 'dogpile.cache.memory', expiration_time=60, ) STATUS_CODES_TO_RETRY = [502, 503, 504] MAX_RETRY_BACK_OFF_SECONDS = 10 @REGION.cache_on_arguments(namespace='host_to_choose') def choice(hosts): """ Select randomly a host :param hosts: Lost of hosts :return: A randomly selected host. """ return secrets.choice(hosts) class BaseClient: """Main client class for accessing Rucio resources. Handles the authentication.""" AUTH_RETRIES, REQUEST_RETRIES = 2, 3 TOKEN_PATH_PREFIX = get_tmp_dir() + '/.rucio_' TOKEN_PREFIX = 'auth_token_' # noqa: S105 TOKEN_EXP_PREFIX = 'auth_token_exp_' # noqa: S105 def __init__(self, rucio_host: Optional[str] = None, auth_host: Optional[str] = None, account: Optional[str] = None, ca_cert: Optional[str] = None, auth_type: Optional[str] = None, creds: Optional[dict[str, Any]] = None, timeout: Optional[int] = 600, user_agent: Optional[str] = 'rucio-clients', vo: Optional[str] = None, logger: Logger = LOG) -> None: """ Constructor of the BaseClient. :param rucio_host: The address of the rucio server, if None it is read from the config file. :param rucio_port: The port of the rucio server, if None it is read from the config file. :param auth_host: The address of the rucio authentication server, if None it is read from the config file. :param auth_port: The port of the rucio authentication server, if None it is read from the config file. :param account: The account to authenticate to rucio. :param use_ssl: Enable or disable ssl for commucation. Default is enabled. :param ca_cert: The path to the rucio server certificate. :param auth_type: The type of authentication (e.g.: 'userpass', 'kerberos' ...) :param creds: Dictionary with credentials needed for authentication. :param user_agent: Indicates the client. :param vo: The VO to authenticate into. :param logger: Logger object to use. If None, use the default LOG created by the module """ self.host = rucio_host self.auth_host = auth_host self.logger = logger self.session = Session() self.user_agent = "%s/%s" % (user_agent, version.version_string()) # e.g. "rucio-clients/0.2.13" sys.argv[0] = sys.argv[0].split('/')[-1] self.script_id = '::'.join(sys.argv[0:2]) if self.script_id == '': # Python interpreter used self.script_id = 'python' try: if self.host is None: self.host = config_get('client', 'rucio_host') if self.auth_host is None: self.auth_host = config_get('client', 'auth_host') except (NoOptionError, NoSectionError) as error: raise MissingClientParameter('Section client and Option \'%s\' cannot be found in config file' % error.args[0]) try: self.trace_host = config_get('trace', 'trace_host') except (NoOptionError, NoSectionError, ConfigNotFound): self.trace_host = self.host self.logger.debug('No trace_host passed. Using rucio_host instead') self.list_hosts = [self.host] self.account = account self.vo = vo self.ca_cert = ca_cert self.auth_token = "" self.headers = {} self.timeout = timeout self.request_retries = self.REQUEST_RETRIES self.token_exp_epoch = None self.auth_oidc_refresh_active = config_get_bool('client', 'auth_oidc_refresh_active', False, False) # defining how many minutes before token expires, oidc refresh (if active) should start self.auth_oidc_refresh_before_exp = config_get_int('client', 'auth_oidc_refresh_before_exp', False, 20) self.auth_type = self._get_auth_type(auth_type) self.creds = self._get_creds(creds) rucio_scheme = urlparse(self.host).scheme auth_scheme = urlparse(self.auth_host).scheme if rucio_scheme != 'http' and rucio_scheme != 'https': raise ClientProtocolNotSupported('\'%s\' not supported' % rucio_scheme) if auth_scheme != 'http' and auth_scheme != 'https': raise ClientProtocolNotSupported('\'%s\' not supported' % auth_scheme) if (rucio_scheme == 'https' or auth_scheme == 'https') and ca_cert is None: self.logger.debug('HTTPS is required, but no ca_cert was passed. Trying to get it from X509_CERT_DIR.') self.ca_cert = os.environ.get('X509_CERT_DIR', None) if self.ca_cert is None: self.logger.debug('HTTPS is required, but no ca_cert was passed and X509_CERT_DIR is not defined. Trying to get it from the config file.') try: self.ca_cert = path.expandvars(config_get('client', 'ca_cert')) except (NoOptionError, NoSectionError): self.logger.debug('No ca_cert found in configuration. Falling back to Mozilla default CA bundle (certifi).') self.ca_cert = True if account is None: self.logger.debug('No account passed. Trying to get it from the RUCIO_ACCOUNT environment variable or the config file.') try: self.account = environ['RUCIO_ACCOUNT'] except KeyError: try: self.account = config_get('client', 'account') except (NoOptionError, NoSectionError): pass if vo is None: self.logger.debug('No VO passed. Trying to get it from environment variable RUCIO_VO.') try: self.vo = environ['RUCIO_VO'] except KeyError: self.logger.debug('No VO found. Trying to get it from the config file.') try: self.vo = config_get('client', 'vo') except (NoOptionError, NoSectionError): self.logger.debug('No VO found. Using default VO.') self.vo = 'def' self.auth_token_file_path, self.token_exp_epoch_file, self.token_file, self.token_path = self._get_auth_tokens() self.__authenticate() try: self.request_retries = config_get_int('client', 'request_retries') except (NoOptionError, ConfigNotFound): self.logger.debug('request_retries not specified in config file. Taking default.') except ValueError: self.logger.debug('request_retries must be an integer. Taking default.') def _get_auth_tokens(self) -> tuple[Optional[str], str, str, str]: # if token file path is defined in the rucio.cfg file, use that file. Currently this prevents authenticating as another user or VO. auth_token_file_path = config_get('client', 'auth_token_file_path', False, None) token_filename_suffix = "for_default_account" if self.account is None else "for_account_" + self.account if auth_token_file_path: token_file = auth_token_file_path token_path = '/'.join(auth_token_file_path.split('/')[:-1]) else: token_path = self.TOKEN_PATH_PREFIX + getpass.getuser() if self.vo != 'def': token_path += '@%s' % self.vo token_file = token_path + '/' + self.TOKEN_PREFIX + token_filename_suffix token_exp_epoch_file = token_path + '/' + self.TOKEN_EXP_PREFIX + token_filename_suffix return auth_token_file_path, token_exp_epoch_file, token_file, token_path def _get_auth_type(self, auth_type: Optional[str]) -> str: if auth_type is None: self.logger.debug('No auth_type passed. Trying to get it from the environment variable RUCIO_AUTH_TYPE and config file.') if 'RUCIO_AUTH_TYPE' in environ: if environ['RUCIO_AUTH_TYPE'] not in ['userpass', 'x509', 'x509_proxy', 'gss', 'ssh', 'saml', 'oidc']: raise MissingClientParameter('Possible RUCIO_AUTH_TYPE values: userpass, x509, x509_proxy, gss, ssh, saml, oidc, vs. ' + environ['RUCIO_AUTH_TYPE']) auth_type = environ['RUCIO_AUTH_TYPE'] else: try: auth_type = config_get('client', 'auth_type') except (NoOptionError, NoSectionError) as error: raise MissingClientParameter('Option \'%s\' cannot be found in config file' % error.args[0]) return auth_type def _get_creds(self, creds: Optional[dict[str, Any]]) -> dict[str, Any]: if self.auth_type == 'oidc': if not creds: creds = {} # if there are default values, check if rucio.cfg does not specify them, otherwise put default if 'oidc_refresh_lifetime' not in creds or creds['oidc_refresh_lifetime'] is None: creds['oidc_refresh_lifetime'] = config_get('client', 'oidc_refresh_lifetime', False, None) if 'oidc_issuer' not in creds or creds['oidc_issuer'] is None: creds['oidc_issuer'] = config_get('client', 'oidc_issuer', False, None) if 'oidc_audience' not in creds or creds['oidc_audience'] is None: creds['oidc_audience'] = config_get('client', 'oidc_audience', False, None) if 'oidc_auto' not in creds or creds['oidc_auto'] is False: creds['oidc_auto'] = config_get_bool('client', 'oidc_auto', False, False) if creds['oidc_auto']: if 'oidc_username' not in creds or creds['oidc_username'] is None: creds['oidc_username'] = config_get('client', 'oidc_username', False, None) if 'oidc_password' not in creds or creds['oidc_password'] is None: creds['oidc_password'] = config_get('client', 'oidc_password', False, None) if 'oidc_scope' not in creds or creds['oidc_scope'] == 'openid profile': creds['oidc_scope'] = config_get('client', 'oidc_scope', False, 'openid profile') if 'oidc_polling' not in creds or creds['oidc_polling'] is False: creds['oidc_polling'] = config_get_bool('client', 'oidc_polling', False, False) if creds is None: self.logger.debug('No creds passed. Trying to get it from the config file.') creds = {} try: if self.auth_type in ['userpass', 'saml']: creds['username'] = config_get('client', 'username') creds['password'] = config_get('client', 'password') elif self.auth_type == 'x509': if "RUCIO_CLIENT_CERT" in environ: client_cert = environ["RUCIO_CLIENT_CERT"] else: client_cert = config_get('client', 'client_cert') creds['client_cert'] = path.abspath(path.expanduser(path.expandvars(client_cert))) if not path.exists(creds['client_cert']): raise MissingClientParameter('X.509 client certificate not found: %s' % creds['client_cert']) if "RUCIO_CLIENT_KEY" in environ: client_key = environ["RUCIO_CLIENT_KEY"] else: client_key = config_get('client', 'client_key') creds['client_key'] = path.abspath(path.expanduser(path.expandvars(client_key))) if not path.exists(creds['client_key']): raise MissingClientParameter('X.509 client key not found: %s' % creds['client_key']) else: perms = oct(os.stat(creds['client_key']).st_mode)[-3:] if perms not in ['400', '600']: raise CannotAuthenticate('X.509 authentication selected, but private key (%s) permissions are liberal (required: 400 or 600, found: %s)' % (creds['client_key'], perms)) elif self.auth_type == 'x509_proxy': try: creds['client_proxy'] = path.abspath(path.expanduser(path.expandvars(config_get('client', 'client_x509_proxy')))) except NoOptionError: # Recreate the classic GSI logic for locating the proxy: # - $X509_USER_PROXY, if it is set. # - /tmp/x509up_u`id -u` otherwise. # If neither exists (at this point, we don't care if it exists but is invalid), then rethrow if 'X509_USER_PROXY' in environ: creds['client_proxy'] = environ['X509_USER_PROXY'] else: fname = '/tmp/x509up_u%d' % geteuid() if path.exists(fname): creds['client_proxy'] = fname else: raise MissingClientParameter( 'Cannot find a valid X509 proxy; not in %s, $X509_USER_PROXY not set, and ' '\'x509_proxy\' not set in the configuration file.' % fname) elif self.auth_type == 'ssh': creds['ssh_private_key'] = path.abspath(path.expanduser(path.expandvars(config_get('client', 'ssh_private_key')))) except (NoOptionError, NoSectionError) as error: if error.args[0] != 'client_key': raise MissingClientParameter('Option \'%s\' cannot be found in config file' % error.args[0]) return creds def _get_exception(self, headers: dict[str, str], status_code: Optional[int] = None, data=None) -> tuple[type[exception.RucioException], str]: """ Helper method to parse an error string send by the server and transform it into the corresponding rucio exception. :param headers: The http response header containing the Rucio exception details. :param status_code: The http status code. :param data: The data with the ExceptionMessage. :return: A rucio exception class and an error string. """ try: data = parse_response(data) except ValueError: data = {} exc_cls = 'RucioException' exc_msg = 'no error information passed (http status code: %s)' % status_code if 'ExceptionClass' in data: exc_cls = data['ExceptionClass'] elif 'ExceptionClass' in headers: exc_cls = headers['ExceptionClass'] if 'ExceptionMessage' in data: exc_msg = data['ExceptionMessage'] elif 'ExceptionMessage' in headers: exc_msg = headers['ExceptionMessage'] if hasattr(exception, exc_cls): return getattr(exception, exc_cls), exc_msg else: return exception.RucioException, "%s: %s" % (exc_cls, exc_msg) def _load_json_data(self, response: requests.Response) -> Generator[Any, Any, Any]: """ Helper method to correctly load json data based on the content type of the http response. :param response: the response received from the server. """ if 'content-type' in response.headers and response.headers['content-type'] == 'application/x-json-stream': for line in response.iter_lines(): if line: yield parse_response(line) elif 'content-type' in response.headers and response.headers['content-type'] == 'application/json': yield parse_response(response.text) else: # Exception ? if response.text: yield response.text def _reduce_data(self, data, maxlen: int = 132) -> str: text = data if isinstance(data, str) else data.decode("utf-8") if len(text) > maxlen: text = "%s ... %s" % (text[:maxlen - 15], text[-10:]) return text def _back_off(self, retry_number: int, reason: str) -> None: """ Sleep a certain amount of time which increases with the retry count :param retry_number: the retry iteration :param reason: the reason to backoff which will be shown to the user """ sleep_time = min(MAX_RETRY_BACK_OFF_SECONDS, 0.25 * 2 ** retry_number) self.logger.warning("Waiting {}s due to reason: {} ".format(sleep_time, reason)) time.sleep(sleep_time) def _send_request(self, url, headers=None, type_='GET', data=None, params=None, stream=False, get_token=False, cert=None, auth=None, verify=None): """ Helper method to send requests to the rucio server. Gets a new token and retries if an unauthorized error is returned. :param url: the http url to use. :param headers: additional http headers to send. :param type_: the http request type to use. :param data: post data. :param params: (optional) Dictionary or bytes to be sent in the url query string. :param get_token: (optional) if it is called from a _get_token function. :param cert: (optional) if String, path to the SSL client cert file (.pem). If Tuple, (cert, key) pair. :param auth: (optional) auth tuple to enable Basic/Digest/Custom HTTP Auth. :param verify: (optional) either a boolean, in which case it controls whether we verify the server's TLS certificate, or a string, in which case it must be a path to a CA bundle to use. :return: the HTTP return body. """ hds = {'X-Rucio-Auth-Token': self.auth_token, 'X-Rucio-VO': self.vo, 'Connection': 'Keep-Alive', 'User-Agent': self.user_agent, 'X-Rucio-Script': self.script_id} if self.account is not None: hds['X-Rucio-Account'] = self.account if headers is not None: hds.update(headers) if verify is None: verify = self.ca_cert or False # Maybe unnecessary but make sure to convert "" -> False self.logger.debug("HTTP request: %s %s" % (type_, url)) for h, v in hds.items(): if h == 'X-Rucio-Auth-Token': v = "[hidden]" self.logger.debug("HTTP header: %s: %s" % (h, v)) if type_ != "GET" and data: text = self._reduce_data(data) self.logger.debug("Request data (length=%d): [%s]" % (len(data), text)) result = None for retry in range(self.AUTH_RETRIES + 1): try: if type_ == 'GET': result = self.session.get(url, headers=hds, verify=verify, timeout=self.timeout, params=params, stream=True, cert=cert, auth=auth) elif type_ == 'PUT': result = self.session.put(url, headers=hds, data=data, verify=verify, timeout=self.timeout) elif type_ == 'POST': result = self.session.post(url, headers=hds, data=data, verify=verify, timeout=self.timeout, stream=stream) elif type_ == 'DEL': result = self.session.delete(url, headers=hds, data=data, verify=verify, timeout=self.timeout) else: self.logger.debug("Unknown request type %s. Request was not sent" % (type_,)) return None self.logger.debug("HTTP Response: %s %s" % (result.status_code, result.reason)) if result.status_code in STATUS_CODES_TO_RETRY: self._back_off(retry, 'server returned {}'.format(result.status_code)) continue if result.status_code // 100 != 2 and result.text: # do not do this for successful requests because the caller may be expecting streamed response self.logger.debug("Response text (length=%d): [%s]" % (len(result.text), result.text)) except ConnectionError as error: self.logger.error('ConnectionError: ' + str(error)) if retry > self.request_retries: raise continue except OSError as error: # Handle Broken Pipe # While in python3 we can directly catch 'BrokenPipeError', in python2 it doesn't exist. if getattr(error, 'errno') != errno.EPIPE: raise self.logger.error('BrokenPipe: ' + str(error)) if retry > self.request_retries: raise continue if result is not None and result.status_code == codes.unauthorized and not get_token: # pylint: disable-msg=E1101 self.session = Session() self.__get_token() hds['X-Rucio-Auth-Token'] = self.auth_token else: break if result is None: raise ServerConnectionException return result def __get_token_userpass(self) -> bool: """ Sends a request to get an auth token from the server and stores it as a class attribute. Uses username/password. :returns: True if the token was successfully received. False otherwise. """ headers = {'X-Rucio-Username': self.creds['username'], 'X-Rucio-Password': self.creds['password']} url = build_url(self.auth_host, path='auth/userpass') result = self._send_request(url, headers=headers, get_token=True) if not result: # result is either None or not OK. if isinstance(result, Response): if 'ExceptionClass' in result.headers and result.headers['ExceptionClass']: if 'ExceptionMessage' in result.headers and result.headers['ExceptionMessage']: raise CannotAuthenticate('%s: %s' % (result.headers['ExceptionClass'], result.headers['ExceptionMessage'])) else: raise CannotAuthenticate(result.headers["ExceptionClass"]) elif result.text: raise CannotAuthenticate(result.text) self.logger.error('Cannot retrieve authentication token!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['x-rucio-auth-token'] return True def __refresh_token_OIDC(self) -> bool: """ Checks if there is active refresh token and if so returns either active token with expiration timestamp or requests a new refresh and returns new access token with new expiration timestamp and saves these in the token directory. :returns: True if the token was successfully received. False otherwise. """ if not self.auth_oidc_refresh_active: return False if path.exists(self.token_exp_epoch_file): with open(self.token_exp_epoch_file, 'r') as token_epoch_file: try: self.token_exp_epoch = int(token_epoch_file.readline()) except: self.token_exp_epoch = None if self.token_exp_epoch is None: # check expiration time for a new token pass elif time.time() > self.token_exp_epoch - self.auth_oidc_refresh_before_exp * 60 and time.time() < self.token_exp_epoch: # attempt to refresh token pass else: return False request_refresh_url = build_url(self.auth_host, path='auth/oidc_refresh') refresh_result = self._send_request(request_refresh_url, get_token=True) if refresh_result.status_code == codes.ok: if 'X-Rucio-Auth-Token-Expires' not in refresh_result.headers or \ 'X-Rucio-Auth-Token' not in refresh_result.headers: print("Rucio Server response does not contain the expected headers.") return False else: new_token = refresh_result.headers['X-Rucio-Auth-Token'] new_exp_epoch = refresh_result.headers['X-Rucio-Auth-Token-Expires'] if new_token and new_exp_epoch: self.logger.debug("Saving token %s and expiration epoch %s to files" % (str(new_token), str(new_exp_epoch))) # save to the file self.auth_token = new_token self.token_exp_epoch = new_exp_epoch self.__write_token() self.headers['X-Rucio-Auth-Token'] = self.auth_token return True self.logger.debug("No new token was received, possibly invalid/expired \ \ntoken or a token with no refresh token in Rucio DB") return False else: print("Rucio Client did not succeed to contact the \ \nRucio Auth Server when attempting token refresh.") return False def __get_token_OIDC(self) -> bool: """ First authenticates the user via a Identity Provider server (with user's username & password), by specifying oidc_scope, user agrees to share the relevant information with Rucio. If all proceeds well, an access token is requested from the Identity Provider. Access Tokens are not stored in Rucio DB. Refresh Tokens are granted only in case no valid access token exists in user's local storage, oidc_scope includes 'offline_access'. In such case, refresh token is stored in Rucio DB. :returns: True if the token was successfully received. False otherwise. """ oidc_scope = str(self.creds['oidc_scope']) headers = {'X-Rucio-Client-Authorize-Auto': str(self.creds['oidc_auto']), 'X-Rucio-Client-Authorize-Polling': str(self.creds['oidc_polling']), 'X-Rucio-Client-Authorize-Scope': str(self.creds['oidc_scope']), 'X-Rucio-Client-Authorize-Refresh-Lifetime': str(self.creds['oidc_refresh_lifetime'])} if self.creds['oidc_audience']: headers['X-Rucio-Client-Authorize-Audience'] = str(self.creds['oidc_audience']) if self.creds['oidc_issuer']: headers['X-Rucio-Client-Authorize-Issuer'] = str(self.creds['oidc_issuer']) if self.creds['oidc_auto']: userpass = {'username': self.creds['oidc_username'], 'password': self.creds['oidc_password']} result = None request_auth_url = build_url(self.auth_host, path='auth/oidc') # requesting authorization URL specific to the user & Rucio OIDC Client self.logger.debug("Initial auth URL request headers %s to files" % str(headers)) OIDC_auth_res = self._send_request(request_auth_url, headers=headers, get_token=True) self.logger.debug("Response headers %s and text %s" % (str(OIDC_auth_res.headers), str(OIDC_auth_res.text))) # with the obtained authorization URL we will contact the Identity Provider to get to the login page if 'X-Rucio-OIDC-Auth-URL' not in OIDC_auth_res.headers: print("Rucio Client did not succeed to get AuthN/Z URL from the Rucio Auth Server. \ \nThis could be due to wrongly requested/configured scope, audience or issuer.") return False auth_url = OIDC_auth_res.headers['X-Rucio-OIDC-Auth-URL'] if not self.creds['oidc_auto']: print("\nPlease use your internet browser, go to:") print("\n " + auth_url + " \n") print("and authenticate with your Identity Provider.") headers['X-Rucio-Client-Fetch-Token'] = 'True' if self.creds['oidc_polling']: timeout = 180 start = time.time() print("In the next 3 minutes, Rucio Client will be polling \ \nthe Rucio authentication server for a token.") print("----------------------------------------------") while time.time() - start < timeout: result = self._send_request(auth_url, headers=headers, get_token=True) if 'X-Rucio-Auth-Token' in result.headers and result.status_code == codes.ok: break time.sleep(2) else: print("Copy paste the code from the browser to the terminal and press enter:") count = 0 while count < 3: fetchcode = input() fetch_url = build_url(self.auth_host, path='auth/oidc_redirect', params=fetchcode) result = self._send_request(fetch_url, headers=headers, get_token=True) if 'X-Rucio-Auth-Token' in result.headers and result.status_code == codes.ok: break else: print("The Rucio Auth Server did not respond as expected. Please, " + "try again and make sure you typed the correct code.") # NOQA: W503 count += 1 else: print("\nAccording to the OAuth2/OIDC standard you should NOT be sharing \n" + "your password with any 3rd party application, therefore, \n" # NOQA: W503 + "we strongly discourage you from following this --oidc-auto approach.") # NOQA: W503 print("-------------------------------------------------------------------------") auth_res = self._send_request(auth_url, get_token=True) # getting the login URL and logging in the user login_url = auth_res.url start = time.time() result = self._send_request(login_url, type_='POST', data=userpass) # if the Rucio OIDC Client configuration does not match the one registered at the Identity Provider # the user will get an OAuth error if 'OAuth Error' in result.text: self.logger.error('Identity Provider does not allow to proceed. Could be due \ \nto misconfigured redirection server name of the Rucio OIDC Client.') return False # In case Rucio Client is not authorized to request information about this user yet, # it will automatically authorize itself on behalf of the user. if result.url == auth_url: form_data = {} for scope_item in oidc_scope.split(): form_data["scope_" + scope_item] = scope_item default_data = {"remember": "until-revoked", "user_oauth_approval": True, "authorize": "Authorize"} form_data.update(default_data) print('Automatically authorising request of the following info on behalf of user: %s', str(form_data)) self.logger.warning('Automatically authorising request of the following info on behalf of user: %s', str(form_data)) # authorizing info request on behalf of the user until he/she revokes this authorization ! result = self._send_request(result.url, type_='POST', data=form_data) if not result: self.logger.error('Cannot retrieve authentication token!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['x-rucio-auth-token'] if self.auth_oidc_refresh_active: self.logger.debug("Resetting the token expiration epoch file content.") # reset the token expiration epoch file content # at new CLI OIDC authentication self.token_exp_epoch = None file_d, file_n = mkstemp(dir=self.token_path) with fdopen(file_d, "w") as f_exp_epoch: f_exp_epoch.write(str(self.token_exp_epoch)) move(file_n, self.token_exp_epoch_file) self.__refresh_token_OIDC() return True def __get_token_x509(self) -> bool: """ Sends a request to get an auth token from the server and stores it as a class attribute. Uses x509 authentication. :returns: True if the token was successfully received. False otherwise. """ client_cert = None client_key = None if self.auth_type == 'x509': url = build_url(self.auth_host, path='auth/x509') client_cert = self.creds['client_cert'] if 'client_key' in self.creds: client_key = self.creds['client_key'] elif self.auth_type == 'x509_proxy': url = build_url(self.auth_host, path='auth/x509_proxy') client_cert = self.creds['client_proxy'] if (client_cert is not None) and not (path.exists(client_cert)): self.logger.error('given client cert (%s) doesn\'t exist' % client_cert) return False if client_key is not None and not path.exists(client_key): self.logger.error('given client key (%s) doesn\'t exist' % client_key) if client_key is None: cert = client_cert else: cert = (client_cert, client_key) result = self._send_request(url, get_token=True, cert=cert) # Note a response object for a failed request evaluates to false, so we cannot # use "not result" here if result is None: self.logger.error('Internal error: Request for authentication token returned no result!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['x-rucio-auth-token'] return True def __get_token_ssh(self) -> bool: """ Sends a request to get an auth token from the server and stores it as a class attribute. Uses SSH key exchange authentication. :returns: True if the token was successfully received. False otherwise. """ headers = {} private_key_path = self.creds['ssh_private_key'] if not path.exists(private_key_path): self.logger.error('given private key (%s) doesn\'t exist' % private_key_path) return False if private_key_path is not None and not path.exists(private_key_path): self.logger.error('given private key (%s) doesn\'t exist' % private_key_path) return False url = build_url(self.auth_host, path='auth/ssh_challenge_token') result = self._send_request(url, get_token=True) if not result: self.logger.error('cannot get ssh_challenge_token') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.ssh_challenge_token = result.headers['x-rucio-ssh-challenge-token'] self.logger.debug('got new ssh challenge token \'%s\'' % self.ssh_challenge_token) # sign the challenge token with the private key with open(private_key_path, 'r') as fd_private_key_path: private_key = fd_private_key_path.read() signature = ssh_sign(private_key, self.ssh_challenge_token) headers['X-Rucio-SSH-Signature'] = signature url = build_url(self.auth_host, path='auth/ssh') result = self._send_request(url, headers=headers, get_token=True) if not result: self.logger.error('Cannot retrieve authentication token!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['x-rucio-auth-token'] return True def __get_token_gss(self) -> bool: """ Sends a request to get an auth token from the server and stores it as a class attribute. Uses Kerberos authentication. :returns: True if the token was successfully received. False otherwise. """ if not EXTRA_MODULES['requests_kerberos']: raise MissingModuleException('The requests-kerberos module is not installed.') url = build_url(self.auth_host, path='auth/gss') result = self._send_request(url, get_token=True, auth=HTTPKerberosAuth()) if not result: self.logger.error('Cannot retrieve authentication token!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['x-rucio-auth-token'] return True def __get_token_saml(self) -> bool: """ Sends a request to get an auth token from the server and stores it as a class attribute. Uses saml authentication. :returns: True if the token was successfully received. False otherwise. """ userpass = {'username': self.creds['username'], 'password': self.creds['password']} url = build_url(self.auth_host, path='auth/saml') result = None SAML_auth_result = self._send_request(url, get_token=True) if SAML_auth_result.headers['X-Rucio-Auth-Token']: return SAML_auth_result.headers['X-Rucio-Auth-Token'] SAML_auth_url = SAML_auth_result.headers['X-Rucio-SAML-Auth-URL'] result = self._send_request(SAML_auth_url, type_='POST', data=userpass, verify=False) result = self._send_request(url, get_token=True) if not result: self.logger.error('Cannot retrieve authentication token!') return False if result.status_code != codes.ok: # pylint: disable-msg=E1101 exc_cls, exc_msg = self._get_exception(headers=result.headers, status_code=result.status_code, data=result.content) raise exc_cls(exc_msg) self.auth_token = result.headers['X-Rucio-Auth-Token'] return True def __get_token(self) -> None: """ Calls the corresponding method to receive an auth token depending on the auth type. To be used if a 401 - Unauthorized error is received. """ self.logger.debug('get a new token') for retry in range(self.AUTH_RETRIES + 1): if self.auth_type == 'userpass': if not self.__get_token_userpass(): raise CannotAuthenticate('userpass authentication failed for account=%s with identity=%s' % (self.account, self.creds['username'])) elif self.auth_type == 'x509' or self.auth_type == 'x509_proxy': if not self.__get_token_x509(): raise CannotAuthenticate('x509 authentication failed for account=%s with identity=%s' % (self.account, self.creds)) elif self.auth_type == 'oidc': if not self.__get_token_OIDC(): raise CannotAuthenticate('OIDC authentication failed for account=%s' % self.account) elif self.auth_type == 'gss': if not self.__get_token_gss(): raise CannotAuthenticate('kerberos authentication failed for account=%s with identity=%s' % (self.account, self.creds)) elif self.auth_type == 'ssh': if not self.__get_token_ssh(): raise CannotAuthenticate('ssh authentication failed for account=%s with identity=%s' % (self.account, self.creds)) elif self.auth_type == 'saml': if not self.__get_token_saml(): raise CannotAuthenticate('saml authentication failed for account=%s with identity=%s' % (self.account, self.creds)) else: raise CannotAuthenticate('auth type \'%s\' not supported' % self.auth_type) if self.auth_token is not None: self.__write_token() self.headers['X-Rucio-Auth-Token'] = self.auth_token break if self.auth_token is None: raise CannotAuthenticate('cannot get an auth token from server') def __read_token(self) -> bool: """ Checks if a local token file exists and reads the token from it. :return: True if a token could be read. False if no file exists. """ if not path.exists(self.token_file): return False try: with open(self.token_file, 'r') as token_file_handler: self.auth_token = token_file_handler.readline() self.headers['X-Rucio-Auth-Token'] = self.auth_token except OSError as error: print("I/O error({0}): {1}".format(error.errno, error.strerror)) except Exception: raise if self.auth_oidc_refresh_active and self.auth_type == 'oidc': self.__refresh_token_OIDC() self.logger.debug('got token from file') return True def __write_token(self) -> None: """ Write the current auth_token to the local token file. """ # check if rucio temp directory is there. If not create it with permissions only for the current user if not path.isdir(self.token_path): try: self.logger.debug('rucio token folder \'%s\' not found. Create it.' % self.token_path) makedirs(self.token_path, 0o700) except Exception: raise try: file_d, file_n = mkstemp(dir=self.token_path) with fdopen(file_d, "w") as f_token: f_token.write(self.auth_token) move(file_n, self.token_file) if self.auth_type == 'oidc' and self.token_exp_epoch and self.auth_oidc_refresh_active: file_d, file_n = mkstemp(dir=self.token_path) with fdopen(file_d, "w") as f_exp_epoch: f_exp_epoch.write(str(self.token_exp_epoch)) move(file_n, self.token_exp_epoch_file) except OSError as error: print("I/O error({0}): {1}".format(error.errno, error.strerror)) except Exception: raise def __authenticate(self) -> None: """ Main method for authentication. It first tries to read a locally saved token. If not available it requests a new one. """ if self.auth_type == 'userpass': if self.creds['username'] is None or self.creds['password'] is None: raise NoAuthInformation('No username or password passed') elif self.auth_type == 'oidc': if self.creds['oidc_auto'] and (self.creds['oidc_username'] is None or self.creds['oidc_password'] is None): raise NoAuthInformation('For automatic OIDC log-in with your Identity Provider username and password are required.') elif self.auth_type == 'x509': if self.creds['client_cert'] is None: raise NoAuthInformation('The path to the client certificate is required') elif self.auth_type == 'x509_proxy': if self.creds['client_proxy'] is None: raise NoAuthInformation('The client proxy has to be defined') elif self.auth_type == 'ssh': if self.creds['ssh_private_key'] is None: raise NoAuthInformation('The SSH private key has to be defined') elif self.auth_type == 'gss': pass elif self.auth_type == 'saml': if self.creds['username'] is None or self.creds['password'] is None: raise NoAuthInformation('No SAML username or password passed') else: raise CannotAuthenticate('auth type \'%s\' not supported' % self.auth_type) if not self.__read_token(): self.__get_token()