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9269e5d6dd
In summary this patch does:
* Follow the defined rules for cookies when:
- receiving a cookie (process the attributes)
- storing a cookie (store cookie + attributes)
- sending a cookie
+ validate the cookie domain against the request URL
+ validate the cookie path against the request URL
+ validate the cookie expiration
+ if valid then send only the cookie, no attribtues
* Modifies how a request URL is stored during a XMLRPC
request/response sequence.
* Refactors a bit of the request/response logic to allow for making
the decision whether to send a session cookie instead of full
Kerberous auth easier.
* The server now includes expiration information in the session cookie
it sends to the client. The server always had the information
available to prevent using an expired session cookie. Now that
expiration timestamp is returned to the client as well and now the
client will not send an expired session cookie back to the server.
* Adds a new module and unit test for cookies (see below)
Formerly we were always returning the session cookie no matter what
the domain or path was in the URL. We were also sending the cookie
attributes which are for the client only (used to determine if to
return a cookie). The attributes are not meant to be sent to the
server and the previous behavior was a protocol violation. We also
were not checking the cookie expiration.
Cookie library issues:
We need a library to create, parse, manipulate and format cookies both
in a client context and a server context. Core Python has two cookie
libraries, Cookie.py and cookielib.py. Why did we add a new cookie
module instead of using either of these two core Python libaries?
Cookie.py is designed for server side generation but can be used to
parse cookies on the client. It's the library we were using in the
server. However when I tried to use it in the client I discovered it
has some serious bugs. There are 7 defined cookie elements, it fails
to correctly parse 3 of the 7 elements which makes it unusable because
we depend on those elements. Since Cookie.py was designed for server
side cookie processing it's not hard to understand how fails to
correctly parse a cookie because that's a client side need. (Cookie.py
also has an awkward baroque API and is missing some useful
functionality we would have to build on top of it).
cookielib.py is designed for client side. It's fully featured and obeys
all the RFC's. It would be great to use however it's tightly coupled
with another core library, urllib2.py. The http request and response
objects must be urllib2 objects. But we don't use urllib2, rather we use
httplib because xmlrpclib uses httplib. I don't see a reason why a
cookie library should be so tightly coupled to a protocol library, but
it is and that means we can't use it (I tried to just pick some isolated
entrypoints for our use but I kept hitting interaction/dependency problems).
I decided to solve the cookie library problems by writing a minimal
cookie library that does what we need and no more than that. It is a
new module in ipapython shared by both client and server and comes
with a new unit test. The module has plenty of documentation, no need
to repeat it here.
Request URL issues:
We also had problems in rpc.py whereby information from the request
which is needed when we process the response is not available. Most
important was the requesting URL. It turns out that the way the class
and object relationships are structured it's impossible to get this
information. Someone else must have run into the same issue because
there was a routine called reconstruct_url() which attempted to
recreate the request URL from other available
information. Unfortunately reconstruct_url() was not callable from
inside the response handler. So I decided to store the information in
the thread context and when the request is received extract it from
the thread context. It's perhaps not an ideal solution but we do
similar things elsewhere so at least it's consistent. I removed the
reconstruct_url() function because the exact information is now in the
context and trying to apply heuristics to recreate the url is probably
not robust.
Ticket https://fedorahosted.org/freeipa/ticket/3022
1216 lines
44 KiB
Python
1216 lines
44 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008 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 cgi import parse_qs
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from xml.sax.saxutils import escape
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from xmlrpclib import Fault
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from wsgiref.util import shift_path_info
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import base64
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import os
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import string
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import datetime
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from decimal import Decimal
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import urlparse
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import time
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from ipalib import plugable
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from ipalib.backend import Executioner
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from ipalib.errors import PublicError, InternalError, CommandError, JSONError, ConversionError, CCacheError, RefererError, InvalidSessionPassword, NotFound, ACIError, ExecutionError
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from ipalib.request import context, Connection, destroy_context
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from ipalib.rpc import xml_dumps, xml_loads
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from ipalib.util import parse_time_duration, normalize_name
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from ipapython.dn import DN
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from ipaserver.plugins.ldap2 import ldap2
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from ipapython.compat import json
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from ipalib.session import session_mgr, AuthManager, get_ipa_ccache_name, load_ccache_data, bind_ipa_ccache, release_ipa_ccache, fmt_time, default_max_session_duration
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from ipalib.backend import Backend
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from ipalib.krb_utils import krb5_parse_ccache, KRB5_CCache, krb_ticket_expiration_threshold, krb5_format_principal_name
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from ipapython import ipautil
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from ipapython.version import VERSION
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from ipalib.text import _
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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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_pwchange_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]
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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]
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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]
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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]
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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)
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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.iteritems():
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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(
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parse_qs(qstr)#, keep_blank_values=True)
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))
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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):
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super(wsgi_dispatch, self).__init__()
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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 StandardError('%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 StandardError('%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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content_type = None
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key = ''
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def set_api(self, api):
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super(WSGIExecutioner, self).set_api(api)
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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 _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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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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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 not in self.Command:
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raise CommandError(name=name)
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result = self.Command[name](*args, **options)
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except PublicError, e:
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error = e
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except StandardError, 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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if name and name in self.Command:
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try:
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params = self.Command[name].args_options_2_params(*args, **options)
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except Exception, 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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principal = getattr(context, 'principal', 'UNKNOWN')
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if error:
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self.info('%s: %s(%s): %s', principal, name, ', '.join(self.Command[name]._repr_iter(**params)), e.__class__.__name__)
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else:
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self.info('%s: %s(%s): SUCCESS', principal, name, ', '.join(self.Command[name]._repr_iter(**params)))
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else:
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self.info('%s: %s', context.principal, e.__class__.__name__)
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return self.marshal(result, error, _id)
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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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|
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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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headers = [('Content-Type', self.content_type + '; charset=utf-8')]
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except StandardError, e:
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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
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headers = [('Content-Type', 'text/plain; charset=utf-8')]
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session_data = getattr(context, 'session_data', None)
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if session_data is not None:
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# Send session cookie back and store session data
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# FIXME: the URL path should be retreived from somewhere (but where?), not hardcoded
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session_cookie = session_mgr.generate_cookie('/ipa', session_data['session_id'],
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session_data['session_expiration_timestamp'])
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headers.append(('Set-Cookie', session_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()' % self.fullname)
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|
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def marshal(self, result, error, _id=None):
|
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raise NotImplementedError('%s.marshal()' % self.fullname)
|
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|
|
|
|
def json_encode_binary(val):
|
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'''
|
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JSON cannot encode binary values. We encode binary values in Python str
|
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objects and text in Python unicode objects. In order to allow a binary
|
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object to be passed through JSON we base64 encode it thus converting it to
|
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text which JSON can transport. To assure we recognize the value is a base64
|
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encoded representation of the original binary value and not confuse it with
|
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other text we convert the binary value to a dict in this form:
|
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{'__base64__' : base64_encoding_of_binary_value}
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|
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This modification of the original input value cannot be done "in place" as
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one might first assume (e.g. replacing any binary items in a container
|
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(e.g. list, tuple, dict) with the base64 dict because the container might be
|
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an immutable object (i.e. a tuple). Therefore this function returns a copy
|
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of any container objects it encounters with tuples replaced by lists. This
|
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is O.K. because the JSON encoding will map both lists and tuples to JSON
|
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arrays.
|
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'''
|
|
|
|
if isinstance(val, dict):
|
|
new_dict = {}
|
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for k,v in val.items():
|
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new_dict[k] = json_encode_binary(v)
|
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return new_dict
|
|
elif isinstance(val, (list, tuple)):
|
|
new_list = [json_encode_binary(v) for v in val]
|
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return new_list
|
|
elif isinstance(val, str):
|
|
return {'__base64__' : base64.b64encode(val)}
|
|
elif isinstance(val, Decimal):
|
|
return {'__base64__' : base64.b64encode(str(val))}
|
|
elif isinstance(val, DN):
|
|
return str(val)
|
|
else:
|
|
return val
|
|
|
|
def json_decode_binary(val):
|
|
'''
|
|
JSON cannot transport binary data. In order to transport binary data we
|
|
convert binary data to a form like this:
|
|
|
|
{'__base64__' : base64_encoding_of_binary_value}
|
|
|
|
see json_encode_binary()
|
|
|
|
After JSON had decoded the JSON stream back into a Python object we must
|
|
recursively scan the object looking for any dicts which might represent
|
|
binary values and replace the dict containing the base64 encoding of the
|
|
binary value with the decoded binary value. Unlike the encoding problem
|
|
where the input might consist of immutable object, all JSON decoded
|
|
container are mutable so the conversion could be done in place. However we
|
|
don't modify objects in place because of side effects which may be
|
|
dangerous. Thus we elect to spend a few more cycles and avoid the
|
|
possibility of unintended side effects in favor of robustness.
|
|
'''
|
|
|
|
if isinstance(val, dict):
|
|
if val.has_key('__base64__'):
|
|
return base64.b64decode(val['__base64__'])
|
|
else:
|
|
new_dict = {}
|
|
for k,v in val.items():
|
|
if isinstance(v, dict) and v.has_key('__base64__'):
|
|
new_dict[k] = base64.b64decode(v['__base64__'])
|
|
else:
|
|
new_dict[k] = json_decode_binary(v)
|
|
return new_dict
|
|
elif isinstance(val, list):
|
|
new_list = []
|
|
n = len(val)
|
|
i = 0
|
|
while i < n:
|
|
v = val[i]
|
|
if isinstance(v, dict) and v.has_key('__base64__'):
|
|
binary_val = base64.b64decode(v['__base64__'])
|
|
new_list.append(binary_val)
|
|
else:
|
|
new_list.append(json_decode_binary(v))
|
|
i += 1
|
|
return new_list
|
|
else:
|
|
if isinstance(val, basestring):
|
|
try:
|
|
return val.decode('utf-8')
|
|
except UnicodeDecodeError:
|
|
raise ConversionError(
|
|
name=val,
|
|
error='incorrect type'
|
|
)
|
|
else:
|
|
return val
|
|
|
|
class jsonserver(WSGIExecutioner, HTTP_Status):
|
|
"""
|
|
JSON RPC server.
|
|
|
|
For information on the JSON-RPC spec, see:
|
|
|
|
http://json-rpc.org/wiki/specification
|
|
"""
|
|
|
|
content_type = 'application/json'
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
|
self.debug('WSGI jsonserver.__call__:')
|
|
|
|
response = super(jsonserver, self).__call__(environ, start_response)
|
|
return response
|
|
|
|
def marshal(self, result, error, _id=None):
|
|
if error:
|
|
assert isinstance(error, PublicError)
|
|
error = dict(
|
|
code=error.errno,
|
|
message=error.strerror,
|
|
name=error.__class__.__name__,
|
|
)
|
|
principal = getattr(context, 'principal', 'UNKNOWN')
|
|
response = dict(
|
|
result=result,
|
|
error=error,
|
|
id=_id,
|
|
principal=unicode(principal),
|
|
version=unicode(VERSION),
|
|
)
|
|
response = json_encode_binary(response)
|
|
return json.dumps(response, sort_keys=True, indent=4)
|
|
|
|
def unmarshal(self, data):
|
|
try:
|
|
d = json.loads(data)
|
|
except ValueError, 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"'))
|
|
d = json_decode_binary(d)
|
|
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.iteritems())
|
|
return (method, args, options, _id)
|
|
|
|
class AuthManagerKerb(AuthManager):
|
|
'''
|
|
Instances of the AuthManger class are used to handle
|
|
authentication events delivered by the SessionManager. This class
|
|
specifcally handles the management of Kerbeos credentials which
|
|
may be stored in the session.
|
|
'''
|
|
|
|
def __init__(self, name):
|
|
super(AuthManagerKerb, self).__init__(name)
|
|
|
|
def logout(self, session_data):
|
|
'''
|
|
The current user has requested to be logged out. To accomplish
|
|
this we remove the user's kerberos credentials from their
|
|
session. This does not destroy the session, it just prevents
|
|
it from being used for fast authentication. Because the
|
|
credentials are no longer in the session cache any future
|
|
attempt will require the acquisition of credentials using one
|
|
of the login mechanisms.
|
|
'''
|
|
|
|
if session_data.has_key('ccache_data'):
|
|
self.debug('AuthManager.logout.%s: deleting ccache_data', self.name)
|
|
del session_data['ccache_data']
|
|
else:
|
|
self.error('AuthManager.logout.%s: session_data does not contain ccache_data', self.name)
|
|
|
|
|
|
class KerberosSession(object):
|
|
'''
|
|
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 kerb_session_on_finalize(self):
|
|
'''
|
|
Initialize values from the Env configuration.
|
|
|
|
Why do it this way and not simply reference
|
|
api.env.session_auth_duration? Because that config item cannot
|
|
be used directly, it must be parsed and converted to an
|
|
integer. It would be inefficient to reparse it on every
|
|
request. So we parse it once and store the result in the class
|
|
instance.
|
|
'''
|
|
# Set the session expiration time
|
|
try:
|
|
seconds = parse_time_duration(self.api.env.session_auth_duration)
|
|
self.session_auth_duration = int(seconds)
|
|
self.debug("session_auth_duration: %s", datetime.timedelta(seconds=self.session_auth_duration))
|
|
except Exception, e:
|
|
self.session_auth_duration = default_max_session_duration
|
|
self.error('unable to parse session_auth_duration, defaulting to %d: %s',
|
|
self.session_auth_duration, e)
|
|
|
|
def update_session_expiration(self, session_data, krb_endtime):
|
|
'''
|
|
Each time a session is created or accessed we need to update
|
|
it's expiration time. The expiration time is set inside the
|
|
session_data.
|
|
|
|
:parameters:
|
|
session_data
|
|
The session data whose expiration is being updatded.
|
|
krb_endtime
|
|
The UNIX timestamp for when the Kerberos credentials expire.
|
|
:returns:
|
|
None
|
|
'''
|
|
|
|
# Account for clock skew and/or give us some time leeway
|
|
krb_expiration = krb_endtime - krb_ticket_expiration_threshold
|
|
|
|
# Set the session expiration time
|
|
session_mgr.set_session_expiration_time(session_data,
|
|
duration=self.session_auth_duration,
|
|
max_age=krb_expiration,
|
|
duration_type=self.api.env.session_duration_type)
|
|
|
|
|
|
def finalize_kerberos_acquisition(self, who, ccache_name, environ, start_response, headers=None):
|
|
if headers is None:
|
|
headers = []
|
|
|
|
# Retrieve the session data (or newly create)
|
|
session_data = session_mgr.load_session_data(environ.get('HTTP_COOKIE'))
|
|
session_id = session_data['session_id']
|
|
|
|
self.debug('finalize_kerberos_acquisition: %s ccache_name="%s" session_id="%s"',
|
|
who, ccache_name, session_id)
|
|
|
|
# Copy the ccache file contents into the session data
|
|
session_data['ccache_data'] = load_ccache_data(ccache_name)
|
|
|
|
# Set when the session will expire
|
|
cc = KRB5_CCache(ccache_name)
|
|
endtime = cc.endtime(self.api.env.host, self.api.env.realm)
|
|
self.update_session_expiration(session_data, endtime)
|
|
|
|
# Store the session data now that it's been updated with the ccache
|
|
session_mgr.store_session_data(session_data)
|
|
|
|
# The request is finished with the ccache, destroy it.
|
|
release_ipa_ccache(ccache_name)
|
|
|
|
# Return success and set session cookie
|
|
session_cookie = session_mgr.generate_cookie('/ipa', session_id,
|
|
session_data['session_expiration_timestamp'])
|
|
headers.append(('Set-Cookie', session_cookie))
|
|
|
|
start_response(HTTP_STATUS_SUCCESS, headers)
|
|
return ['']
|
|
|
|
|
|
class xmlserver(WSGIExecutioner, HTTP_Status, KerberosSession):
|
|
"""
|
|
Execution backend plugin for XML-RPC server.
|
|
|
|
Also see the `ipalib.rpc.xmlclient` plugin.
|
|
"""
|
|
|
|
content_type = 'text/xml'
|
|
key = '/xml'
|
|
|
|
def _on_finalize(self):
|
|
self.__system = {
|
|
'system.listMethods': self.listMethods,
|
|
'system.methodSignature': self.methodSignature,
|
|
'system.methodHelp': self.methodHelp,
|
|
}
|
|
super(xmlserver, self)._on_finalize()
|
|
self.kerb_session_on_finalize()
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
|
self.debug('WSGI xmlserver.__call__:')
|
|
user_ccache=environ.get('KRB5CCNAME')
|
|
if user_ccache is None:
|
|
self.internal_error(environ, start_response,
|
|
'xmlserver.__call__: KRB5CCNAME not defined in HTTP request environment')
|
|
return self.marshal(None, CCacheError())
|
|
try:
|
|
self.create_context(ccache=user_ccache)
|
|
response = super(xmlserver, self).__call__(environ, start_response)
|
|
if getattr(context, 'session_data', None) is None and \
|
|
self.env.context != 'lite':
|
|
self.finalize_kerberos_acquisition('xmlserver', user_ccache, environ, start_response)
|
|
except PublicError, e:
|
|
status = HTTP_STATUS_SUCCESS
|
|
response = status
|
|
headers = [('Content-Type', 'text/plain; charset=utf-8')]
|
|
start_response(status, headers)
|
|
return self.marshal(None, e)
|
|
finally:
|
|
destroy_context()
|
|
return response
|
|
|
|
def listMethods(self, *params):
|
|
return tuple(name.decode('UTF-8') for name in self.Command)
|
|
|
|
def methodSignature(self, *params):
|
|
return u'methodSignature not implemented'
|
|
|
|
def methodHelp(self, *params):
|
|
return u'methodHelp not implemented'
|
|
|
|
def unmarshal(self, data):
|
|
(params, name) = xml_loads(data)
|
|
(args, options) = params_2_args_options(params)
|
|
return (name, args, options, None)
|
|
|
|
def marshal(self, result, error, _id=None):
|
|
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,)
|
|
return xml_dumps(response, methodresponse=True)
|
|
|
|
|
|
class jsonserver_session(jsonserver, KerberosSession):
|
|
"""
|
|
JSON RPC server protected with session auth.
|
|
"""
|
|
|
|
key = '/session/json'
|
|
|
|
def __init__(self):
|
|
super(jsonserver_session, self).__init__()
|
|
auth_mgr = AuthManagerKerb(self.__class__.__name__)
|
|
session_mgr.auth_mgr.register(auth_mgr.name, auth_mgr)
|
|
|
|
def _on_finalize(self):
|
|
super(jsonserver_session, self)._on_finalize()
|
|
self.kerb_session_on_finalize()
|
|
|
|
def need_login(self, start_response):
|
|
status = '401 Unauthorized'
|
|
headers = []
|
|
response = ''
|
|
|
|
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__:')
|
|
|
|
# Load the session data
|
|
session_data = session_mgr.load_session_data(environ.get('HTTP_COOKIE'))
|
|
session_id = session_data['session_id']
|
|
|
|
self.debug('jsonserver_session.__call__: session_id=%s start_timestamp=%s access_timestamp=%s expiration_timestamp=%s',
|
|
session_id,
|
|
fmt_time(session_data['session_start_timestamp']),
|
|
fmt_time(session_data['session_access_timestamp']),
|
|
fmt_time(session_data['session_expiration_timestamp']))
|
|
|
|
ccache_data = session_data.get('ccache_data')
|
|
|
|
# Redirect to login if no Kerberos credentials
|
|
if ccache_data is None:
|
|
self.debug('no ccache, need login')
|
|
return self.need_login(start_response)
|
|
|
|
ipa_ccache_name = bind_ipa_ccache(ccache_data)
|
|
|
|
# Redirect to login if Kerberos credentials are expired
|
|
cc = KRB5_CCache(ipa_ccache_name)
|
|
if not cc.valid(self.api.env.host, self.api.env.realm):
|
|
self.debug('ccache expired, deleting session, need login')
|
|
# The request is finished with the ccache, destroy it.
|
|
release_ipa_ccache(ipa_ccache_name)
|
|
return self.need_login(start_response)
|
|
|
|
# Update the session expiration based on the Kerberos expiration
|
|
endtime = cc.endtime(self.api.env.host, self.api.env.realm)
|
|
self.update_session_expiration(session_data, endtime)
|
|
|
|
# Store the session data in the per-thread context
|
|
setattr(context, 'session_data', session_data)
|
|
|
|
# This may fail if a ticket from wrong realm was handled via browser
|
|
try:
|
|
self.create_context(ccache=ipa_ccache_name)
|
|
except ACIError, e:
|
|
return self.unauthorized(environ, start_response, str(e), 'denied')
|
|
|
|
try:
|
|
response = super(jsonserver_session, self).__call__(environ, start_response)
|
|
finally:
|
|
# Kerberos may have updated the ccache data during the
|
|
# execution of the command therefore we need refresh our
|
|
# copy of it in the session data so the next command sees
|
|
# the same state of the ccache.
|
|
#
|
|
# However we must be careful not to restore the ccache
|
|
# data in the session data if it was explicitly deleted
|
|
# during the execution of the command. For example the
|
|
# logout command removes the ccache data from the session
|
|
# data to invalidate the session credentials.
|
|
|
|
if session_data.has_key('ccache_data'):
|
|
session_data['ccache_data'] = load_ccache_data(ipa_ccache_name)
|
|
|
|
# The request is finished with the ccache, destroy it.
|
|
release_ipa_ccache(ipa_ccache_name)
|
|
# Store the session data.
|
|
session_mgr.store_session_data(session_data)
|
|
destroy_context()
|
|
|
|
return response
|
|
|
|
class jsonserver_kerb(jsonserver):
|
|
"""
|
|
JSON RPC server protected with kerberos auth.
|
|
"""
|
|
|
|
key = '/json'
|
|
|
|
def __call__(self, environ, start_response):
|
|
'''
|
|
'''
|
|
|
|
self.debug('WSGI jsonserver_kerb.__call__:')
|
|
|
|
user_ccache=environ.get('KRB5CCNAME')
|
|
if user_ccache is None:
|
|
self.internal_error(environ, start_response,
|
|
'jsonserver_kerb.__call__: KRB5CCNAME not defined in HTTP request environment')
|
|
return self.marshal(None, CCacheError())
|
|
self.create_context(ccache=user_ccache)
|
|
|
|
try:
|
|
response = super(jsonserver_kerb, self).__call__(environ, start_response)
|
|
finally:
|
|
destroy_context()
|
|
|
|
return response
|
|
|
|
|
|
class login_kerberos(Backend, KerberosSession, HTTP_Status):
|
|
key = '/session/login_kerberos'
|
|
|
|
def __init__(self):
|
|
super(login_kerberos, self).__init__()
|
|
|
|
def _on_finalize(self):
|
|
super(login_kerberos, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
self.kerb_session_on_finalize()
|
|
|
|
def __call__(self, environ, start_response):
|
|
self.debug('WSGI login_kerberos.__call__:')
|
|
|
|
# Get the ccache created by mod_auth_kerb
|
|
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_password(Backend, KerberosSession, HTTP_Status):
|
|
|
|
content_type = 'text/plain'
|
|
key = '/session/login_password'
|
|
|
|
def __init__(self):
|
|
super(login_password, self).__init__()
|
|
|
|
def _on_finalize(self):
|
|
super(login_password, self)._on_finalize()
|
|
self.api.Backend.wsgi_dispatch.mount(self, self.key)
|
|
self.kerb_session_on_finalize()
|
|
|
|
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 = urlparse.parse_qs(query_string)
|
|
except Exception, 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
|
|
# FIXME: uppercasing may be removed when better handling of UPN
|
|
# is introduced
|
|
|
|
parts = normalize_name(user)
|
|
|
|
if "domain" in parts:
|
|
# username is of the form user@SERVER_REALM or user@server_realm
|
|
|
|
# check whether the realm is server's realm
|
|
# Users from other realms are not supported
|
|
# (they do not have necessary LDAP entry, LDAP connect will fail)
|
|
|
|
if parts["domain"].upper()==self.api.env.realm:
|
|
user=parts["name"]
|
|
else:
|
|
return self.unauthorized(environ, start_response, '', 'denied')
|
|
|
|
elif "flatname" in parts:
|
|
# username is of the form NetBIOS\user
|
|
return self.unauthorized(environ, start_response, '', 'denied')
|
|
|
|
else:
|
|
# username is of the form user or of some wild form, e.g.
|
|
# user@REALM1@REALM2 or NetBIOS1\NetBIOS2\user (see normalize_name)
|
|
|
|
# wild form username will fail at kinit, so nothing needs to be done
|
|
pass
|
|
|
|
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 = get_ipa_ccache_name()
|
|
reason = 'invalid-password'
|
|
try:
|
|
self.kinit(user, self.api.env.realm, password, ipa_ccache_name)
|
|
except InvalidSessionPassword, e:
|
|
# Ok, now why is this bad. Is the password simply bad or is the
|
|
# password expired?
|
|
try:
|
|
dn = DN(('uid', user),
|
|
self.api.env.container_user,
|
|
self.api.env.basedn)
|
|
conn = ldap2(shared_instance=False,
|
|
ldap_uri=self.api.env.ldap_uri)
|
|
conn.connect(bind_dn=dn, bind_pw=password)
|
|
|
|
# password is ok, must be expired, lets double-check
|
|
(userdn, entry_attrs) = conn.get_entry(dn,
|
|
['krbpasswordexpiration'])
|
|
if 'krbpasswordexpiration' in entry_attrs:
|
|
expiration = entry_attrs['krbpasswordexpiration'][0]
|
|
try:
|
|
exp = time.strptime(expiration, '%Y%m%d%H%M%SZ')
|
|
if exp <= time.gmtime():
|
|
reason = 'password-expired'
|
|
except ValueError, v:
|
|
self.error('Unable to convert %s to a time string'
|
|
% expiration)
|
|
|
|
except Exception:
|
|
# It doesn't really matter how we got here but the user's
|
|
# password is not accepted or the user is unknown.
|
|
pass
|
|
finally:
|
|
if conn.isconnected():
|
|
conn.destroy_connection()
|
|
|
|
return self.unauthorized(environ, start_response, str(e), reason)
|
|
|
|
return self.finalize_kerberos_acquisition('login_password', ipa_ccache_name, environ, start_response)
|
|
|
|
def kinit(self, user, realm, password, ccache_name):
|
|
# Format the user as a kerberos principal
|
|
principal = krb5_format_principal_name(user, realm)
|
|
|
|
(stdout, stderr, returncode) = ipautil.run(['/usr/bin/kinit', principal],
|
|
env={'KRB5CCNAME':ccache_name},
|
|
stdin=password, raiseonerr=False)
|
|
self.debug('kinit: principal=%s returncode=%s, stderr="%s"',
|
|
principal, returncode, stderr)
|
|
|
|
if returncode != 0:
|
|
raise InvalidSessionPassword(principal=principal, message=unicode(stderr))
|
|
|
|
class change_password(Backend, HTTP_Status):
|
|
|
|
content_type = 'text/plain'
|
|
key = '/session/change_password'
|
|
|
|
def __init__(self):
|
|
super(change_password, self).__init__()
|
|
|
|
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 = urlparse.parse_qs(query_string)
|
|
except Exception, e:
|
|
return self.bad_request(environ, start_response, "cannot parse query data")
|
|
|
|
data = {}
|
|
for field in ('user', 'old_password', 'new_password'):
|
|
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)
|
|
else:
|
|
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:
|
|
conn = ldap2(shared_instance=False,
|
|
ldap_uri=self.api.env.ldap_uri)
|
|
conn.connect(bind_dn=bind_dn, bind_pw=data['old_password'])
|
|
except (NotFound, ACIError):
|
|
result = 'invalid-password'
|
|
message = 'The old password or username is not correct.'
|
|
except Exception, 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'])
|
|
except ExecutionError, e:
|
|
result = 'policy-error'
|
|
policy_error = escape(str(e))
|
|
message = "Password change was rejected: %s" % escape(str(e))
|
|
except Exception, 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.destroy_connection()
|
|
|
|
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 = _pwchange_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):
|
|
super(xmlserver_session, self).__init__()
|
|
auth_mgr = AuthManagerKerb(self.__class__.__name__)
|
|
session_mgr.auth_mgr.register(auth_mgr.name, auth_mgr)
|
|
|
|
def _on_finalize(self):
|
|
super(xmlserver_session, self)._on_finalize()
|
|
self.kerb_session_on_finalize()
|
|
|
|
def need_login(self, start_response):
|
|
status = '401 Unauthorized'
|
|
headers = []
|
|
response = ''
|
|
|
|
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__:')
|
|
|
|
# Load the session data
|
|
session_data = session_mgr.load_session_data(environ.get('HTTP_COOKIE'))
|
|
session_id = session_data['session_id']
|
|
|
|
self.debug('xmlserver_session.__call__: session_id=%s start_timestamp=%s access_timestamp=%s expiration_timestamp=%s',
|
|
session_id,
|
|
fmt_time(session_data['session_start_timestamp']),
|
|
fmt_time(session_data['session_access_timestamp']),
|
|
fmt_time(session_data['session_expiration_timestamp']))
|
|
|
|
ccache_data = session_data.get('ccache_data')
|
|
|
|
# Redirect to /ipa/xml if no Kerberos credentials
|
|
if ccache_data is None:
|
|
self.debug('xmlserver_session.__call_: no ccache, need TGT')
|
|
return self.need_login(start_response)
|
|
|
|
ipa_ccache_name = bind_ipa_ccache(ccache_data)
|
|
|
|
# Redirect to /ipa/xml if Kerberos credentials are expired
|
|
cc = KRB5_CCache(ipa_ccache_name)
|
|
if not cc.valid(self.api.env.host, self.api.env.realm):
|
|
self.debug('xmlserver_session.__call_: ccache expired, deleting session, need login')
|
|
# The request is finished with the ccache, destroy it.
|
|
release_ipa_ccache(ipa_ccache_name)
|
|
return self.need_login(start_response)
|
|
|
|
# Update the session expiration based on the Kerberos expiration
|
|
endtime = cc.endtime(self.api.env.host, self.api.env.realm)
|
|
self.update_session_expiration(session_data, endtime)
|
|
|
|
# Store the session data in the per-thread context
|
|
setattr(context, 'session_data', session_data)
|
|
|
|
environ['KRB5CCNAME'] = ipa_ccache_name
|
|
|
|
try:
|
|
response = super(xmlserver_session, self).__call__(environ, start_response)
|
|
finally:
|
|
# Kerberos may have updated the ccache data during the
|
|
# execution of the command therefore we need refresh our
|
|
# copy of it in the session data so the next command sees
|
|
# the same state of the ccache.
|
|
#
|
|
# However we must be careful not to restore the ccache
|
|
# data in the session data if it was explicitly deleted
|
|
# during the execution of the command. For example the
|
|
# logout command removes the ccache data from the session
|
|
# data to invalidate the session credentials.
|
|
|
|
if session_data.has_key('ccache_data'):
|
|
session_data['ccache_data'] = load_ccache_data(ipa_ccache_name)
|
|
|
|
# The request is finished with the ccache, destroy it.
|
|
release_ipa_ccache(ipa_ccache_name)
|
|
# Store the session data.
|
|
session_mgr.store_session_data(session_data)
|
|
destroy_context()
|
|
|
|
return response
|