pyramid_cubicweb/auth.py
author Christophe de Vienne <cdevienne@gmail.com>
Fri, 07 Aug 2015 11:52:08 +0200
changeset 11592 197e10cb74f7
parent 11562 a49f08423f02
child 11593 73bf8377a3d5
permissions -rw-r--r--
[auth] Make the configuration cookies completely configurable Also transfert the secret setting from all-in-one.conf to pyramid.ini, with backward compatibility. Closes #5999625
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import datetime
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import logging
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import warnings
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from zope.interface import implementer
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from pyramid.settings import asbool
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from pyramid.authorization import ACLAuthorizationPolicy
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from pyramid_cubicweb.core import get_principals
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from pyramid_multiauth import MultiAuthenticationPolicy
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from pyramid.authentication import AuthTktAuthenticationPolicy
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from pyramid.interfaces import IAuthenticationPolicy
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log = logging.getLogger(__name__)
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@implementer(IAuthenticationPolicy)
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class UpdateLoginTimeAuthenticationPolicy(object):
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    """An authentication policy that update the user last_login_time.
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    The update is done in the 'remember' method, which is called by the login
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    views login,
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    Usually used via :func:`includeme`.
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    """
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    def authenticated_userid(self, request):
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        pass
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    def effective_principals(self, request):
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        return ()
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    def remember(self, request, principal, **kw):
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        try:
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            repo = request.registry['cubicweb.repository']
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            with repo.internal_cnx() as cnx:
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                cnx.execute(
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                    "SET U last_login_time %(now)s WHERE U eid %(user)s", {
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                        'now': datetime.datetime.now(),
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                        'user': principal})
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                cnx.commit()
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        except:
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            log.exception("Failed to update last_login_time")
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        return ()
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    def forget(self, request):
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        return ()
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class CWAuthTktAuthenticationPolicy(AuthTktAuthenticationPolicy):
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    """
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    An authentication policy that inhibate the call the 'remember' if a
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    'persistent' argument is passed to it, and is equal to the value that
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    was passed to the constructor.
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    This allow to combine two policies with different settings and select them
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    by just setting this argument.
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    """
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    def __init__(self, secret, persistent, defaults={}, prefix='', **settings):
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        self.persistent = persistent
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        unset = object()
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        kw = {}
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        # load string settings
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        for name in ('cookie_name', 'path', 'domain', 'hashalg'):
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            value = settings.get(prefix + name, defaults.get(name, unset))
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            if value is not unset:
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                kw[name] = value
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        # load boolean settings
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        for name in ('secure', 'include_ip', 'http_only', 'wild_domain',
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                     'parent_domain', 'debug'):
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            value = settings.get(prefix + name, defaults.get(name, unset))
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            if value is not unset:
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                kw[name] = asbool(value)
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        # load int settings
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        for name in ('timeout', 'reissue_time', 'max_age'):
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            value = settings.get(prefix + name, defaults.get(name, unset))
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            if value is not unset:
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                kw[name] = int(value)
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        super(CWAuthTktAuthenticationPolicy, self).__init__(secret, **kw)
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    def remember(self, request, principals, **kw):
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        if 'persistent' not in kw or kw.pop('persistent') == self.persistent:
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            return super(CWAuthTktAuthenticationPolicy, self).remember(
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                request, principals, **kw)
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        else:
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            return ()
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def includeme(config):
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    """ Activate the CubicWeb AuthTkt authentication policy.
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    Usually called via ``config.include('pyramid_cubicweb.auth')``.
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    See also :ref:`defaults_module`
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    """
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    settings = config.registry.settings
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    policies = []
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    if asbool(settings.get('cubicweb.auth.update_login_time', True)):
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        policies.append(UpdateLoginTimeAuthenticationPolicy())
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    if asbool(settings.get('cubicweb.auth.authtkt', True)):
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        session_prefix = 'cubicweb.auth.authtkt.session.'
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        persistent_prefix = 'cubicweb.auth.authtkt.persistent.'
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        try:
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            secret = config.registry['cubicweb.config']['pyramid-auth-secret']
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            warnings.warn(
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                "pyramid-auth-secret from all-in-one is now "
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                "cubicweb.auth.authtkt.[session|persistent].secret",
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                DeprecationWarning)
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        except:
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            secret = 'notsosecret'
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        session_secret = settings.get(
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            session_prefix + 'secret', secret)
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        persistent_secret = settings.get(
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            persistent_prefix + 'secret', secret)
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        if 'notsosecret' in (session_secret, persistent_secret):
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            warnings.warn('''
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                !! SECURITY WARNING !!
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                The authentication cookies are signed with a static secret key.
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                Configure the following options in your pyramid.ini file:
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                - cubicweb.auth.authtkt.session.secret
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                - cubicweb.auth.authtkt.persistent.secret
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                YOU SHOULD STOP THIS INSTANCE unless your really know what you
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                are doing !!
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            ''')
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        policies.append(
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            CWAuthTktAuthenticationPolicy(
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                session_secret, False,
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                defaults={
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                    'hashalg': 'sha512',
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                    'cookie_name': 'auth_tkt',
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                    'timeout': 1200,
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                    'reissue_time': 120
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                },
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                prefix=session_prefix,
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                **settings
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            )
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        )
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        policies.append(
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            CWAuthTktAuthenticationPolicy(
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                persistent_secret, True,
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                defaults={
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                    'hashalg': 'sha512',
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                    'cookie_name': 'pauth_tkt',
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                    'max_age': 3600*24*30,
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                    'reissue_time': 3600*24
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                },
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                prefix=persistent_prefix,
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                **settings
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            )
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        )
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    kw = {}
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    if asbool(settings.get('cubicweb.auth.groups_principals', True)):
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        kw['callback'] = get_principals
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    authpolicy = MultiAuthenticationPolicy(policies, **kw)
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    config.registry['cubicweb.authpolicy'] = authpolicy
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    config.set_authentication_policy(authpolicy)
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    config.set_authorization_policy(ACLAuthorizationPolicy())