mirror of
https://salsa.debian.org/freeipa-team/freeipa.git
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83619e804b
In some circumstances the ccache file may disappear while mod_auth_gssapi still has a valid cookie and the client is performing a json server call. This may lead to credentials getting sourced from the keytab. Make sure we enforce what GSS NAME we want to resolve so HTTP creds are never mistakenly sourced. Ticket: #6972 Signed-off-by: Simo Sorce <simo@redhat.com> Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
1238 lines
43 KiB
Python
1238 lines
43 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008-2016 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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RPC server.
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Also see the `ipalib.rpc` module.
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"""
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from xml.sax.saxutils import escape
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import os
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import traceback
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import gssapi
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import requests
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import ldap.controls
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from pyasn1.type import univ, namedtype
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from pyasn1.codec.ber import encoder
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import six
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# pylint: disable=import-error
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from six.moves.urllib.parse import parse_qs
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from six.moves.xmlrpc_client import Fault
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# pylint: enable=import-error
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from ipalib import plugable, errors
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from ipalib.capabilities import VERSION_WITHOUT_CAPABILITIES
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from ipalib.frontend import Local
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from ipalib.install.kinit import kinit_armor, kinit_password
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from ipalib.backend import Executioner
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from ipalib.errors import (PublicError, InternalError, JSONError,
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CCacheError, RefererError, InvalidSessionPassword, NotFound, ACIError,
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ExecutionError, PasswordExpired, KrbPrincipalExpired, UserLocked)
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from ipalib.request import context, destroy_context
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from ipalib.rpc import (xml_dumps, xml_loads,
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json_encode_binary, json_decode_binary)
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from ipapython.dn import DN
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from ipaserver.plugins.ldap2 import ldap2
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from ipalib.backend import Backend
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from ipalib.krb_utils import (
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get_credentials_if_valid)
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from ipapython import kerberos
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from ipapython import ipautil
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from ipaplatform.paths import paths
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from ipapython.version import VERSION
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from ipalib.text import _
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from base64 import b64decode, b64encode
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from requests.auth import AuthBase
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if six.PY3:
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unicode = str
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HTTP_STATUS_SUCCESS = '200 Success'
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HTTP_STATUS_SERVER_ERROR = '500 Internal Server Error'
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_not_found_template = """<html>
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<head>
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<title>404 Not Found</title>
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</head>
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<body>
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<h1>Not Found</h1>
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<p>
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The requested URL <strong>%(url)s</strong> was not found on this server.
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</p>
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</body>
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</html>"""
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_bad_request_template = """<html>
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<head>
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<title>400 Bad Request</title>
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</head>
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<body>
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<h1>Bad Request</h1>
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<p>
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<strong>%(message)s</strong>
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</p>
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</body>
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</html>"""
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_internal_error_template = """<html>
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<head>
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<title>500 Internal Server Error</title>
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</head>
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<body>
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<h1>Internal Server Error</h1>
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<p>
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<strong>%(message)s</strong>
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</p>
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</body>
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</html>"""
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_unauthorized_template = """<html>
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<head>
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<title>401 Unauthorized</title>
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</head>
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<body>
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<h1>Invalid Authentication</h1>
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<p>
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<strong>%(message)s</strong>
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</p>
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</body>
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</html>"""
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_success_template = """<html>
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<head>
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<title>200 Success</title>
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</head>
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<body>
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<h1>%(title)s</h1>
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<p>
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<strong>%(message)s</strong>
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</p>
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</body>
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</html>"""
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class HTTP_Status(plugable.Plugin):
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def not_found(self, environ, start_response, url, message):
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"""
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Return a 404 Not Found error.
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"""
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status = '404 Not Found'
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response_headers = [('Content-Type', 'text/html; charset=utf-8')]
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self.info('%s: URL="%s", %s', status, url, message)
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start_response(status, response_headers)
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output = _not_found_template % dict(url=escape(url))
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return [output.encode('utf-8')]
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def bad_request(self, environ, start_response, message):
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"""
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Return a 400 Bad Request error.
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"""
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status = '400 Bad Request'
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response_headers = [('Content-Type', 'text/html; charset=utf-8')]
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self.info('%s: %s', status, message)
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start_response(status, response_headers)
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output = _bad_request_template % dict(message=escape(message))
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return [output.encode('utf-8')]
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def internal_error(self, environ, start_response, message):
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"""
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Return a 500 Internal Server Error.
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"""
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status = HTTP_STATUS_SERVER_ERROR
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response_headers = [('Content-Type', 'text/html; charset=utf-8')]
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self.error('%s: %s', status, message)
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start_response(status, response_headers)
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output = _internal_error_template % dict(message=escape(message))
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return [output.encode('utf-8')]
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def unauthorized(self, environ, start_response, message, reason):
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"""
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Return a 401 Unauthorized error.
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"""
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status = '401 Unauthorized'
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response_headers = [('Content-Type', 'text/html; charset=utf-8')]
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if reason:
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response_headers.append(('X-IPA-Rejection-Reason', reason))
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self.info('%s: %s', status, message)
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start_response(status, response_headers)
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output = _unauthorized_template % dict(message=escape(message))
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return [output.encode('utf-8')]
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def read_input(environ):
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"""
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Read the request body from environ['wsgi.input'].
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"""
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try:
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length = int(environ.get('CONTENT_LENGTH'))
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except (ValueError, TypeError):
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return
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return environ['wsgi.input'].read(length).decode('utf-8')
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def params_2_args_options(params):
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if len(params) == 0:
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return (tuple(), dict())
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if len(params) == 1:
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return (params[0], dict())
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return (params[0], params[1])
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def nicify_query(query, encoding='utf-8'):
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if not query:
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return
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for (key, value) in query.items():
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if len(value) == 0:
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yield (key, None)
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elif len(value) == 1:
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yield (key, value[0].decode(encoding))
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else:
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yield (key, tuple(v.decode(encoding) for v in value))
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def extract_query(environ):
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"""
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Return the query as a ``dict``, or ``None`` if no query is presest.
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"""
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qstr = None
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if environ['REQUEST_METHOD'] == 'POST':
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if environ['CONTENT_TYPE'] == 'application/x-www-form-urlencoded':
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qstr = read_input(environ)
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elif environ['REQUEST_METHOD'] == 'GET':
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qstr = environ['QUERY_STRING']
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if qstr:
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query = dict(nicify_query(parse_qs(qstr))) # keep_blank_values=True)
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else:
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query = {}
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environ['wsgi.query'] = query
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return query
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class wsgi_dispatch(Executioner, HTTP_Status):
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"""
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WSGI routing middleware and entry point into IPA server.
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The `wsgi_dispatch` plugin is the entry point into the IPA server.
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It dispatchs the request to the appropriate wsgi application
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handler which is specific to the authentication and RPC mechanism.
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"""
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def __init__(self, api):
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super(wsgi_dispatch, self).__init__(api)
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self.__apps = {}
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def __iter__(self):
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for key in sorted(self.__apps):
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yield key
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def __getitem__(self, key):
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return self.__apps[key]
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def __contains__(self, key):
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return key in self.__apps
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def __call__(self, environ, start_response):
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self.debug('WSGI wsgi_dispatch.__call__:')
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try:
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return self.route(environ, start_response)
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finally:
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destroy_context()
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def _on_finalize(self):
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self.url = self.env['mount_ipa']
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super(wsgi_dispatch, self)._on_finalize()
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def route(self, environ, start_response):
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key = environ.get('PATH_INFO')
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if key in self.__apps:
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app = self.__apps[key]
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return app(environ, start_response)
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url = environ['SCRIPT_NAME'] + environ['PATH_INFO']
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return self.not_found(environ, start_response, url,
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'URL fragment "%s" does not have a handler' % (key))
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def mount(self, app, key):
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"""
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Mount the WSGI application *app* at *key*.
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"""
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# if self.__islocked__():
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# raise Exception('%s.mount(): locked, cannot mount %r at %r' % (
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# self.name, app, key)
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# )
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if key in self.__apps:
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raise Exception('%s.mount(): cannot replace %r with %r at %r' % (
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self.name, self.__apps[key], app, key)
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)
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self.debug('Mounting %r at %r', app, key)
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self.__apps[key] = app
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class WSGIExecutioner(Executioner):
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"""
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Base class for execution backends with a WSGI application interface.
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"""
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headers = None
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content_type = None
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key = ''
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_system_commands = {}
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def _on_finalize(self):
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self.url = self.env.mount_ipa + self.key
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super(WSGIExecutioner, self)._on_finalize()
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if 'wsgi_dispatch' in self.api.Backend:
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self.api.Backend.wsgi_dispatch.mount(self, self.key)
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def _get_command(self, name):
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try:
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# assume version 1 for unversioned command calls
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command = self.api.Command[name, '1']
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except KeyError:
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try:
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command = self.api.Command[name]
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except KeyError:
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command = None
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if command is None or isinstance(command, Local):
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raise errors.CommandError(name=name)
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return command
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def wsgi_execute(self, environ):
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result = None
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error = None
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_id = None
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lang = os.environ['LANG']
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name = None
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args = ()
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options = {}
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command = None
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e = None
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if not 'HTTP_REFERER' in environ:
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return self.marshal(result, RefererError(referer='missing'), _id)
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if not environ['HTTP_REFERER'].startswith('https://%s/ipa' % self.api.env.host) and not self.env.in_tree:
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return self.marshal(result, RefererError(referer=environ['HTTP_REFERER']), _id)
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try:
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if ('HTTP_ACCEPT_LANGUAGE' in environ):
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lang_reg_w_q = environ['HTTP_ACCEPT_LANGUAGE'].split(',')[0]
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lang_reg = lang_reg_w_q.split(';')[0]
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lang_ = lang_reg.split('-')[0]
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if '-' in lang_reg:
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reg = lang_reg.split('-')[1].upper()
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else:
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reg = lang_.upper()
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os.environ['LANG'] = '%s_%s' % (lang_, reg)
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if (
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environ.get('CONTENT_TYPE', '').startswith(self.content_type)
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and environ['REQUEST_METHOD'] == 'POST'
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):
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data = read_input(environ)
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(name, args, options, _id) = self.unmarshal(data)
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else:
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(name, args, options, _id) = self.simple_unmarshal(environ)
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if name in self._system_commands:
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result = self._system_commands[name](self, *args, **options)
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else:
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command = self._get_command(name)
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result = command(*args, **options)
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except PublicError as e:
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if self.api.env.debug:
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self.debug('WSGI wsgi_execute PublicError: %s', traceback.format_exc())
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error = e
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except Exception as e:
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self.exception(
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'non-public: %s: %s', e.__class__.__name__, str(e)
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)
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error = InternalError()
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finally:
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os.environ['LANG'] = lang
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principal = getattr(context, 'principal', 'UNKNOWN')
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if command is not None:
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try:
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params = command.args_options_2_params(*args, **options)
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except Exception as e:
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self.info(
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'exception %s caught when converting options: %s', e.__class__.__name__, str(e)
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)
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# get at least some context of what is going on
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params = options
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error = e
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if error:
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result_string = type(error).__name__
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else:
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result_string = 'SUCCESS'
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self.info('[%s] %s: %s(%s): %s',
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type(self).__name__,
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principal,
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name,
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', '.join(command._repr_iter(**params)),
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result_string)
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else:
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self.info('[%s] %s: %s: %s',
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type(self).__name__,
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principal,
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name,
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type(error).__name__)
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version = options.get('version', VERSION_WITHOUT_CAPABILITIES)
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return self.marshal(result, error, _id, version)
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def simple_unmarshal(self, environ):
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name = environ['PATH_INFO'].strip('/')
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options = extract_query(environ)
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return (name, tuple(), options, None)
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def __call__(self, environ, start_response):
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"""
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WSGI application for execution.
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"""
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self.debug('WSGI WSGIExecutioner.__call__:')
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try:
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status = HTTP_STATUS_SUCCESS
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response = self.wsgi_execute(environ)
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if self.headers:
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headers = self.headers
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else:
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headers = [('Content-Type',
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self.content_type + '; charset=utf-8')]
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except Exception:
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self.exception('WSGI %s.__call__():', self.name)
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status = HTTP_STATUS_SERVER_ERROR
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response = status.encode('utf-8')
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headers = [('Content-Type', 'text/plain; charset=utf-8')]
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logout_cookie = getattr(context, 'logout_cookie', None)
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if logout_cookie is not None:
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headers.append(('IPASESSION', logout_cookie))
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start_response(status, headers)
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return [response]
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|
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def unmarshal(self, data):
|
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raise NotImplementedError('%s.unmarshal()' % type(self).__name__)
|
|
|
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def marshal(self, result, error, _id=None,
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version=VERSION_WITHOUT_CAPABILITIES):
|
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raise NotImplementedError('%s.marshal()' % type(self).__name__)
|
|
|
|
|
|
class jsonserver(WSGIExecutioner, HTTP_Status):
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"""
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|
JSON RPC server.
|
|
|
|
For information on the JSON-RPC spec, see:
|
|
|
|
http://json-rpc.org/wiki/specification
|
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"""
|
|
|
|
content_type = 'application/json'
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
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self.debug('WSGI jsonserver.__call__:')
|
|
|
|
response = super(jsonserver, self).__call__(environ, start_response)
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return response
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|
|
|
def marshal(self, result, error, _id=None,
|
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version=VERSION_WITHOUT_CAPABILITIES):
|
|
if error:
|
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assert isinstance(error, PublicError)
|
|
error = dict(
|
|
code=error.errno,
|
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message=error.strerror,
|
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data=error.kw,
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name=unicode(error.__class__.__name__),
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)
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principal = getattr(context, 'principal', 'UNKNOWN')
|
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response = dict(
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result=result,
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|
error=error,
|
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id=_id,
|
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principal=unicode(principal),
|
|
version=unicode(VERSION),
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)
|
|
dump = json_encode_binary(
|
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response, version, pretty_print=self.api.env.debug >= 2
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)
|
|
return dump.encode('utf-8')
|
|
|
|
def unmarshal(self, data):
|
|
try:
|
|
d = json_decode_binary(data)
|
|
except ValueError as e:
|
|
raise JSONError(error=e)
|
|
if not isinstance(d, dict):
|
|
raise JSONError(error=_('Request must be a dict'))
|
|
if 'method' not in d:
|
|
raise JSONError(error=_('Request is missing "method"'))
|
|
if 'params' not in d:
|
|
raise JSONError(error=_('Request is missing "params"'))
|
|
method = d['method']
|
|
params = d['params']
|
|
_id = d.get('id')
|
|
if not isinstance(params, (list, tuple)):
|
|
raise JSONError(error=_('params must be a list'))
|
|
if len(params) != 2:
|
|
raise JSONError(error=_('params must contain [args, options]'))
|
|
args = params[0]
|
|
if not isinstance(args, (list, tuple)):
|
|
raise JSONError(error=_('params[0] (aka args) must be a list'))
|
|
options = params[1]
|
|
if not isinstance(options, dict):
|
|
raise JSONError(error=_('params[1] (aka options) must be a dict'))
|
|
options = dict((str(k), v) for (k, v) in options.items())
|
|
return (method, args, options, _id)
|
|
|
|
|
|
class NegotiateAuth(AuthBase):
|
|
"""Negotiate Augh using python GSSAPI"""
|
|
def __init__(self, target_host, ccache_name=None):
|
|
self.context = None
|
|
self.target_host = target_host
|
|
self.ccache_name = ccache_name
|
|
|
|
def __call__(self, request):
|
|
self.initial_step(request)
|
|
request.register_hook('response', self.handle_response)
|
|
return request
|
|
|
|
def deregister(self, response):
|
|
response.request.deregister_hook('response', self.handle_response)
|
|
|
|
def _get_negotiate_token(self, response):
|
|
token = None
|
|
if response is not None:
|
|
h = response.headers.get('www-authenticate', '')
|
|
if h.startswith('Negotiate'):
|
|
val = h[h.find('Negotiate') + len('Negotiate'):].strip()
|
|
if len(val) > 0:
|
|
token = b64decode(val)
|
|
return token
|
|
|
|
def _set_authz_header(self, request, token):
|
|
request.headers['Authorization'] = 'Negotiate ' + b64encode(token)
|
|
|
|
def initial_step(self, request, response=None):
|
|
if self.context is None:
|
|
store = {'ccache': self.ccache_name}
|
|
creds = gssapi.Credentials(usage='initiate', store=store)
|
|
name = gssapi.Name('HTTP@{0}'.format(self.target_host),
|
|
name_type=gssapi.NameType.hostbased_service)
|
|
self.context = gssapi.SecurityContext(creds=creds, name=name,
|
|
usage='initiate')
|
|
|
|
in_token = self._get_negotiate_token(response)
|
|
out_token = self.context.step(in_token)
|
|
self._set_authz_header(request, out_token)
|
|
|
|
def handle_response(self, response, **kwargs):
|
|
status = response.status_code
|
|
if status >= 400 and status != 401:
|
|
return response
|
|
|
|
in_token = self._get_negotiate_token(response)
|
|
if in_token is not None:
|
|
out_token = self.context.step(in_token)
|
|
if self.context.complete:
|
|
return response
|
|
elif not out_token:
|
|
return response
|
|
|
|
self._set_authz_header(response.request, out_token)
|
|
# use response so we can make another request
|
|
_ = response.content # pylint: disable=unused-variable
|
|
response.raw.release_conn()
|
|
newresp = response.connection.send(response.request, **kwargs)
|
|
newresp.history.append(response)
|
|
return self.handle_response(newresp, **kwargs)
|
|
|
|
return response
|
|
|
|
|
|
class KerberosSession(HTTP_Status):
|
|
'''
|
|
Functionally shared by all RPC handlers using both sessions and
|
|
Kerberos. This class must be implemented as a mixin class rather
|
|
than the more obvious technique of subclassing because the classes
|
|
needing this do not share a common base class.
|
|
'''
|
|
|
|
|
|
def finalize_kerberos_acquisition(self, who, ccache_name, environ, start_response, headers=None):
|
|
if headers is None:
|
|
headers = []
|
|
|
|
# Connect back to ourselves to get mod_auth_gssapi to
|
|
# generate a cookie for us.
|
|
try:
|
|
target = self.api.env.host
|
|
r = requests.get('http://{0}/ipa/session/cookie'.format(target),
|
|
auth=NegotiateAuth(target, ccache_name),
|
|
verify=paths.IPA_CA_CRT)
|
|
session_cookie = r.cookies.get("ipa_session")
|
|
if not session_cookie:
|
|
raise ValueError('No session cookie found')
|
|
except Exception as e:
|
|
return self.unauthorized(environ, start_response,
|
|
str(e),
|
|
'Authentication failed')
|
|
|
|
headers.append(('IPASESSION', session_cookie))
|
|
|
|
start_response(HTTP_STATUS_SUCCESS, headers)
|
|
return ['']
|
|
|
|
|
|
class KerberosWSGIExecutioner(WSGIExecutioner, KerberosSession):
|
|
"""Base class for xmlserver and jsonserver_kerb
|
|
"""
|
|
|
|
def _on_finalize(self):
|
|
super(KerberosWSGIExecutioner, self)._on_finalize()
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.debug('KerberosWSGIExecutioner.__call__:')
|
|
user_ccache=environ.get('KRB5CCNAME')
|
|
|
|
object.__setattr__(
|
|
self, 'headers',
|
|
[('Content-Type', '%s; charset=utf-8' % self.content_type)]
|
|
)
|
|
|
|
if user_ccache is None:
|
|
|
|
status = HTTP_STATUS_SERVER_ERROR
|
|
|
|
self.log.error(
|
|
'%s: %s', status,
|
|
'KerberosWSGIExecutioner.__call__: '
|
|
'KRB5CCNAME not defined in HTTP request environment')
|
|
|
|
return self.marshal(None, CCacheError())
|
|
|
|
try:
|
|
self.create_context(ccache=user_ccache)
|
|
response = super(KerberosWSGIExecutioner, self).__call__(
|
|
environ, start_response)
|
|
except PublicError as e:
|
|
status = HTTP_STATUS_SUCCESS
|
|
response = status.encode('utf-8')
|
|
start_response(status, self.headers)
|
|
return self.marshal(None, e)
|
|
finally:
|
|
destroy_context()
|
|
return response
|
|
|
|
|
|
class xmlserver(KerberosWSGIExecutioner):
|
|
"""
|
|
Execution backend plugin for XML-RPC server.
|
|
|
|
Also see the `ipalib.rpc.xmlclient` plugin.
|
|
"""
|
|
|
|
content_type = 'text/xml'
|
|
key = '/xml'
|
|
|
|
def listMethods(self, *params):
|
|
"""list methods for XML-RPC introspection"""
|
|
if params:
|
|
raise errors.ZeroArgumentError(name='system.listMethods')
|
|
return (tuple(unicode(cmd.name) for cmd in self.Command()
|
|
if cmd is self.Command[cmd.name]) +
|
|
tuple(unicode(name) for name in self._system_commands))
|
|
|
|
def _get_method_name(self, name, *params):
|
|
"""Get a method name for XML-RPC introspection commands"""
|
|
if not params:
|
|
raise errors.RequirementError(name='method name')
|
|
elif len(params) > 1:
|
|
raise errors.MaxArgumentError(name=name, count=1)
|
|
[method_name] = params
|
|
return method_name
|
|
|
|
def methodSignature(self, *params):
|
|
"""get method signature for XML-RPC introspection"""
|
|
method_name = self._get_method_name('system.methodSignature', *params)
|
|
if method_name in self._system_commands:
|
|
# TODO
|
|
# for now let's not go out of our way to document standard XML-RPC
|
|
return u'undef'
|
|
else:
|
|
self._get_command(method_name)
|
|
|
|
# All IPA commands return a dict (struct),
|
|
# and take a params, options - list and dict (array, struct)
|
|
return [[u'struct', u'array', u'struct']]
|
|
|
|
def methodHelp(self, *params):
|
|
"""get method docstring for XML-RPC introspection"""
|
|
method_name = self._get_method_name('system.methodHelp', *params)
|
|
if method_name in self._system_commands:
|
|
return u''
|
|
else:
|
|
command = self._get_command(method_name)
|
|
return unicode(command.doc or '')
|
|
|
|
_system_commands = {
|
|
'system.listMethods': listMethods,
|
|
'system.methodSignature': methodSignature,
|
|
'system.methodHelp': methodHelp,
|
|
}
|
|
|
|
def unmarshal(self, data):
|
|
(params, name) = xml_loads(data)
|
|
if name in self._system_commands:
|
|
# For XML-RPC introspection, return params directly
|
|
return (name, params, {}, None)
|
|
(args, options) = params_2_args_options(params)
|
|
if 'version' not in options:
|
|
# Keep backwards compatibility with client containing
|
|
# bug https://fedorahosted.org/freeipa/ticket/3294:
|
|
# If `version` is not given in XML-RPC, assume an old version
|
|
options['version'] = VERSION_WITHOUT_CAPABILITIES
|
|
return (name, args, options, None)
|
|
|
|
def marshal(self, result, error, _id=None,
|
|
version=VERSION_WITHOUT_CAPABILITIES):
|
|
if error:
|
|
self.debug('response: %s: %s', error.__class__.__name__, str(error))
|
|
response = Fault(error.errno, error.strerror)
|
|
else:
|
|
if isinstance(result, dict):
|
|
self.debug('response: entries returned %d', result.get('count', 1))
|
|
response = (result,)
|
|
dump = xml_dumps(response, version, methodresponse=True)
|
|
return dump.encode('utf-8')
|
|
|
|
|
|
class jsonserver_session(jsonserver, KerberosSession):
|
|
"""
|
|
JSON RPC server protected with session auth.
|
|
"""
|
|
|
|
key = '/session/json'
|
|
|
|
def __init__(self, api):
|
|
super(jsonserver_session, self).__init__(api)
|
|
|
|
def _on_finalize(self):
|
|
super(jsonserver_session, self)._on_finalize()
|
|
|
|
def need_login(self, start_response):
|
|
status = '401 Unauthorized'
|
|
headers = []
|
|
response = b''
|
|
|
|
self.debug('jsonserver_session: %s need login', status)
|
|
|
|
start_response(status, headers)
|
|
return [response]
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
|
self.debug('WSGI jsonserver_session.__call__:')
|
|
|
|
ccache_name = environ.get('KRB5CCNAME')
|
|
|
|
# Redirect to login if no Kerberos credentials
|
|
if ccache_name is None:
|
|
self.debug('no ccache, need login')
|
|
return self.need_login(start_response)
|
|
|
|
# If we have a ccache, make sure we have a GSS_NAME and use
|
|
# it to resolve the ccache name (Issue: 6972 )
|
|
principal = environ.get('GSS_NAME')
|
|
if principal is None:
|
|
self.debug('no GSS Name, need login')
|
|
return self.need_login(start_response)
|
|
gss_name = gssapi.Name(principal, gssapi.NameType.kerberos_principal)
|
|
|
|
# Redirect to login if Kerberos credentials are expired
|
|
creds = get_credentials_if_valid(name=gss_name,
|
|
ccache_name=ccache_name)
|
|
if not creds:
|
|
self.debug('ccache expired, deleting session, need login')
|
|
# The request is finished with the ccache, destroy it.
|
|
return self.need_login(start_response)
|
|
|
|
# Store the ccache name in the per-thread context
|
|
setattr(context, 'ccache_name', ccache_name)
|
|
|
|
# This may fail if a ticket from wrong realm was handled via browser
|
|
try:
|
|
self.create_context(ccache=ccache_name)
|
|
except ACIError as e:
|
|
return self.unauthorized(environ, start_response, str(e), 'denied')
|
|
|
|
try:
|
|
response = super(jsonserver_session, self).__call__(environ, start_response)
|
|
finally:
|
|
destroy_context()
|
|
|
|
return response
|
|
|
|
|
|
class jsonserver_kerb(jsonserver, KerberosWSGIExecutioner):
|
|
"""
|
|
JSON RPC server protected with kerberos auth.
|
|
"""
|
|
|
|
key = '/json'
|
|
|
|
|
|
class KerberosLogin(Backend, KerberosSession):
|
|
key = None
|
|
|
|
def _on_finalize(self):
|
|
super(KerberosLogin, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.debug('WSGI KerberosLogin.__call__:')
|
|
|
|
# Get the ccache created by mod_auth_gssapi
|
|
user_ccache_name=environ.get('KRB5CCNAME')
|
|
if user_ccache_name is None:
|
|
return self.internal_error(environ, start_response,
|
|
'login_kerberos: KRB5CCNAME not defined in HTTP request environment')
|
|
|
|
return self.finalize_kerberos_acquisition('login_kerberos', user_ccache_name, environ, start_response)
|
|
|
|
|
|
class login_kerberos(KerberosLogin):
|
|
key = '/session/login_kerberos'
|
|
|
|
|
|
class login_x509(KerberosLogin):
|
|
key = '/session/login_x509'
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.debug('WSGI login_x509.__call__:')
|
|
|
|
if 'KRB5CCNAME' not in environ:
|
|
return self.unauthorized(
|
|
environ, start_response, 'KRB5CCNAME not set',
|
|
'Authentication failed')
|
|
|
|
return super(login_x509, self).__call__(environ, start_response)
|
|
|
|
|
|
class login_password(Backend, KerberosSession):
|
|
|
|
content_type = 'text/plain'
|
|
key = '/session/login_password'
|
|
|
|
def _on_finalize(self):
|
|
super(login_password, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.debug('WSGI login_password.__call__:')
|
|
|
|
# Get the user and password parameters from the request
|
|
content_type = environ.get('CONTENT_TYPE', '').lower()
|
|
if not content_type.startswith('application/x-www-form-urlencoded'):
|
|
return self.bad_request(environ, start_response, "Content-Type must be application/x-www-form-urlencoded")
|
|
|
|
method = environ.get('REQUEST_METHOD', '').upper()
|
|
if method == 'POST':
|
|
query_string = read_input(environ)
|
|
else:
|
|
return self.bad_request(environ, start_response, "HTTP request method must be POST")
|
|
|
|
try:
|
|
query_dict = parse_qs(query_string)
|
|
except Exception as e:
|
|
return self.bad_request(environ, start_response, "cannot parse query data")
|
|
|
|
user = query_dict.get('user', None)
|
|
if user is not None:
|
|
if len(user) == 1:
|
|
user = user[0]
|
|
else:
|
|
return self.bad_request(environ, start_response, "more than one user parameter")
|
|
else:
|
|
return self.bad_request(environ, start_response, "no user specified")
|
|
|
|
# allows login in the form user@SERVER_REALM or user@server_realm
|
|
# we kinit as enterprise principal so we can assume that unknown realms
|
|
# are UPN
|
|
try:
|
|
user_principal = kerberos.Principal(user)
|
|
except Exception:
|
|
# the principal is malformed in some way (e.g. user@REALM1@REALM2)
|
|
# netbios names (NetBIOS1\user) are also not accepted (yet)
|
|
return self.unauthorized(environ, start_response, '', 'denied')
|
|
|
|
password = query_dict.get('password', None)
|
|
if password is not None:
|
|
if len(password) == 1:
|
|
password = password[0]
|
|
else:
|
|
return self.bad_request(environ, start_response, "more than one password parameter")
|
|
else:
|
|
return self.bad_request(environ, start_response, "no password specified")
|
|
|
|
# Get the ccache we'll use and attempt to get credentials in it with user,password
|
|
ipa_ccache_name = os.path.join(paths.IPA_CCACHES,
|
|
'kinit_{}'.format(os.getpid()))
|
|
try:
|
|
# try to remove in case an old file was there
|
|
os.unlink(ipa_ccache_name)
|
|
except OSError:
|
|
pass
|
|
try:
|
|
self.kinit(user_principal, password, ipa_ccache_name)
|
|
except PasswordExpired as e:
|
|
return self.unauthorized(environ, start_response, str(e), 'password-expired')
|
|
except InvalidSessionPassword as e:
|
|
return self.unauthorized(environ, start_response, str(e), 'invalid-password')
|
|
except KrbPrincipalExpired as e:
|
|
return self.unauthorized(environ,
|
|
start_response,
|
|
str(e),
|
|
'krbprincipal-expired')
|
|
except UserLocked as e:
|
|
return self.unauthorized(environ,
|
|
start_response,
|
|
str(e),
|
|
'user-locked')
|
|
|
|
result = self.finalize_kerberos_acquisition('login_password',
|
|
ipa_ccache_name, environ,
|
|
start_response)
|
|
try:
|
|
# Try not to litter the filesystem with unused TGTs
|
|
os.unlink(ipa_ccache_name)
|
|
except OSError:
|
|
pass
|
|
return result
|
|
|
|
def kinit(self, principal, password, ccache_name):
|
|
# get anonymous ccache as an armor for FAST to enable OTP auth
|
|
armor_path = os.path.join(paths.IPA_CCACHES,
|
|
"armor_{}".format(os.getpid()))
|
|
|
|
self.debug('Obtaining armor in ccache %s', armor_path)
|
|
|
|
try:
|
|
kinit_armor(
|
|
armor_path,
|
|
pkinit_anchors=[paths.KDC_CERT, paths.KDC_CA_BUNDLE_PEM],
|
|
)
|
|
except RuntimeError as e:
|
|
self.error("Failed to obtain armor cache")
|
|
# We try to continue w/o armor, 2FA will be impacted
|
|
armor_path = None
|
|
|
|
try:
|
|
kinit_password(
|
|
unicode(principal),
|
|
password,
|
|
ccache_name,
|
|
armor_ccache_name=armor_path,
|
|
enterprise=True)
|
|
|
|
if armor_path:
|
|
self.debug('Cleanup the armor ccache')
|
|
ipautil.run([paths.KDESTROY, '-A', '-c', armor_path],
|
|
env={'KRB5CCNAME': armor_path}, raiseonerr=False)
|
|
except RuntimeError as e:
|
|
if ('kinit: Cannot read password while '
|
|
'getting initial credentials') in str(e):
|
|
raise PasswordExpired(principal=principal, message=unicode(e))
|
|
elif ('kinit: Client\'s entry in database'
|
|
' has expired while getting initial credentials') in str(e):
|
|
raise KrbPrincipalExpired(principal=principal,
|
|
message=unicode(e))
|
|
elif ('kinit: Clients credentials have been revoked '
|
|
'while getting initial credentials') in str(e):
|
|
raise UserLocked(principal=principal,
|
|
message=unicode(e))
|
|
raise InvalidSessionPassword(principal=principal,
|
|
message=unicode(e))
|
|
|
|
|
|
class change_password(Backend, HTTP_Status):
|
|
|
|
content_type = 'text/plain'
|
|
key = '/session/change_password'
|
|
|
|
def _on_finalize(self):
|
|
super(change_password, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.info('WSGI change_password.__call__:')
|
|
|
|
# Get the user and password parameters from the request
|
|
content_type = environ.get('CONTENT_TYPE', '').lower()
|
|
if not content_type.startswith('application/x-www-form-urlencoded'):
|
|
return self.bad_request(environ, start_response, "Content-Type must be application/x-www-form-urlencoded")
|
|
|
|
method = environ.get('REQUEST_METHOD', '').upper()
|
|
if method == 'POST':
|
|
query_string = read_input(environ)
|
|
else:
|
|
return self.bad_request(environ, start_response, "HTTP request method must be POST")
|
|
|
|
try:
|
|
query_dict = parse_qs(query_string)
|
|
except Exception as e:
|
|
return self.bad_request(environ, start_response, "cannot parse query data")
|
|
|
|
data = {}
|
|
for field in ('user', 'old_password', 'new_password', 'otp'):
|
|
value = query_dict.get(field, None)
|
|
if value is not None:
|
|
if len(value) == 1:
|
|
data[field] = value[0]
|
|
else:
|
|
return self.bad_request(environ, start_response, "more than one %s parameter"
|
|
% field)
|
|
elif field != 'otp': # otp is optional
|
|
return self.bad_request(environ, start_response, "no %s specified" % field)
|
|
|
|
# start building the response
|
|
self.info("WSGI change_password: start password change of user '%s'", data['user'])
|
|
status = HTTP_STATUS_SUCCESS
|
|
response_headers = [('Content-Type', 'text/html; charset=utf-8')]
|
|
title = 'Password change rejected'
|
|
result = 'error'
|
|
policy_error = None
|
|
|
|
bind_dn = DN((self.api.Object.user.primary_key.name, data['user']),
|
|
self.api.env.container_user, self.api.env.basedn)
|
|
|
|
try:
|
|
pw = data['old_password']
|
|
if data.get('otp'):
|
|
pw = data['old_password'] + data['otp']
|
|
conn = ldap2(self.api)
|
|
conn.connect(bind_dn=bind_dn, bind_pw=pw)
|
|
except (NotFound, ACIError):
|
|
result = 'invalid-password'
|
|
message = 'The old password or username is not correct.'
|
|
except Exception as e:
|
|
message = "Could not connect to LDAP server."
|
|
self.error("change_password: cannot authenticate '%s' to LDAP server: %s",
|
|
data['user'], str(e))
|
|
else:
|
|
try:
|
|
conn.modify_password(bind_dn, data['new_password'], data['old_password'], skip_bind=True)
|
|
except ExecutionError as e:
|
|
result = 'policy-error'
|
|
policy_error = escape(str(e))
|
|
message = "Password change was rejected: %s" % escape(str(e))
|
|
except Exception as e:
|
|
message = "Could not change the password"
|
|
self.error("change_password: cannot change password of '%s': %s",
|
|
data['user'], str(e))
|
|
else:
|
|
result = 'ok'
|
|
title = "Password change successful"
|
|
message = "Password was changed."
|
|
finally:
|
|
if conn.isconnected():
|
|
conn.disconnect()
|
|
|
|
self.info('%s: %s', status, message)
|
|
|
|
response_headers.append(('X-IPA-Pwchange-Result', result))
|
|
if policy_error:
|
|
response_headers.append(('X-IPA-Pwchange-Policy-Error', policy_error))
|
|
|
|
start_response(status, response_headers)
|
|
output = _success_template % dict(title=str(title),
|
|
message=str(message))
|
|
return [output]
|
|
|
|
class sync_token(Backend, HTTP_Status):
|
|
content_type = 'text/plain'
|
|
key = '/session/sync_token'
|
|
|
|
class OTPSyncRequest(univ.Sequence):
|
|
OID = "2.16.840.1.113730.3.8.10.6"
|
|
|
|
componentType = namedtype.NamedTypes(
|
|
namedtype.NamedType('firstCode', univ.OctetString()),
|
|
namedtype.NamedType('secondCode', univ.OctetString()),
|
|
namedtype.OptionalNamedType('tokenDN', univ.OctetString())
|
|
)
|
|
|
|
def _on_finalize(self):
|
|
super(sync_token, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
|
|
def __call__(self, environ, start_response):
|
|
# Make sure this is a form request.
|
|
content_type = environ.get('CONTENT_TYPE', '').lower()
|
|
if not content_type.startswith('application/x-www-form-urlencoded'):
|
|
return self.bad_request(environ, start_response, "Content-Type must be application/x-www-form-urlencoded")
|
|
|
|
# Make sure this is a POST request.
|
|
method = environ.get('REQUEST_METHOD', '').upper()
|
|
if method == 'POST':
|
|
query_string = read_input(environ)
|
|
else:
|
|
return self.bad_request(environ, start_response, "HTTP request method must be POST")
|
|
|
|
# Parse the query string to a dictionary.
|
|
try:
|
|
query_dict = parse_qs(query_string)
|
|
except Exception as e:
|
|
return self.bad_request(environ, start_response, "cannot parse query data")
|
|
data = {}
|
|
for field in ('user', 'password', 'first_code', 'second_code', 'token'):
|
|
value = query_dict.get(field, None)
|
|
if value is not None:
|
|
if len(value) == 1:
|
|
data[field] = value[0]
|
|
else:
|
|
return self.bad_request(environ, start_response, "more than one %s parameter"
|
|
% field)
|
|
elif field != 'token':
|
|
return self.bad_request(environ, start_response, "no %s specified" % field)
|
|
|
|
# Create the request control.
|
|
sr = self.OTPSyncRequest()
|
|
sr.setComponentByName('firstCode', data['first_code'])
|
|
sr.setComponentByName('secondCode', data['second_code'])
|
|
if 'token' in data:
|
|
try:
|
|
token_dn = DN(data['token'])
|
|
except ValueError:
|
|
token_dn = DN((self.api.Object.otptoken.primary_key.name, data['token']),
|
|
self.api.env.container_otp, self.api.env.basedn)
|
|
|
|
sr.setComponentByName('tokenDN', str(token_dn))
|
|
rc = ldap.controls.RequestControl(sr.OID, True, encoder.encode(sr))
|
|
|
|
# Resolve the user DN
|
|
bind_dn = DN((self.api.Object.user.primary_key.name, data['user']),
|
|
self.api.env.container_user, self.api.env.basedn)
|
|
|
|
# Start building the response.
|
|
status = HTTP_STATUS_SUCCESS
|
|
response_headers = [('Content-Type', 'text/html; charset=utf-8')]
|
|
title = 'Token sync rejected'
|
|
|
|
# Perform the synchronization.
|
|
conn = ldap2(self.api)
|
|
try:
|
|
conn.connect(bind_dn=bind_dn,
|
|
bind_pw=data['password'],
|
|
serverctrls=[rc,])
|
|
result = 'ok'
|
|
title = "Token sync successful"
|
|
message = "Token was synchronized."
|
|
except (NotFound, ACIError):
|
|
result = 'invalid-credentials'
|
|
message = 'The username, password or token codes are not correct.'
|
|
except Exception as e:
|
|
result = 'error'
|
|
message = "Could not connect to LDAP server."
|
|
self.error("token_sync: cannot authenticate '%s' to LDAP server: %s",
|
|
data['user'], str(e))
|
|
finally:
|
|
if conn.isconnected():
|
|
conn.disconnect()
|
|
|
|
# Report status and return.
|
|
response_headers.append(('X-IPA-TokenSync-Result', result))
|
|
start_response(status, response_headers)
|
|
output = _success_template % dict(title=str(title),
|
|
message=str(message))
|
|
return [output]
|
|
|
|
class xmlserver_session(xmlserver, KerberosSession):
|
|
"""
|
|
XML RPC server protected with session auth.
|
|
"""
|
|
|
|
key = '/session/xml'
|
|
|
|
def __init__(self, api):
|
|
super(xmlserver_session, self).__init__(api)
|
|
|
|
def _on_finalize(self):
|
|
super(xmlserver_session, self)._on_finalize()
|
|
|
|
def need_login(self, start_response):
|
|
status = '401 Unauthorized'
|
|
headers = []
|
|
response = b''
|
|
|
|
self.debug('xmlserver_session: %s need login', status)
|
|
|
|
start_response(status, headers)
|
|
return [response]
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
|
self.debug('WSGI xmlserver_session.__call__:')
|
|
|
|
ccache_name = environ.get('KRB5CCNAME')
|
|
|
|
# Redirect to /ipa/xml if no Kerberos credentials
|
|
if ccache_name is None:
|
|
self.debug('xmlserver_session.__call_: no ccache, need TGT')
|
|
return self.need_login(start_response)
|
|
|
|
# Redirect to /ipa/xml if Kerberos credentials are expired
|
|
creds = get_credentials_if_valid(ccache_name=ccache_name)
|
|
if not creds:
|
|
self.debug('xmlserver_session.__call_: ccache expired, deleting session, need login')
|
|
# The request is finished with the ccache, destroy it.
|
|
return self.need_login(start_response)
|
|
|
|
# Store the session data in the per-thread context
|
|
setattr(context, 'ccache_name', ccache_name)
|
|
|
|
try:
|
|
response = super(xmlserver_session, self).__call__(environ, start_response)
|
|
finally:
|
|
destroy_context()
|
|
|
|
return response
|