summary refs log tree commit diff
path: root/synapse/config/saml2_config.py
blob: be9f04d780fe7c53767c126db67b0414c675b8dd (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
# -*- coding: utf-8 -*-
# Copyright 2018 New Vector Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from synapse.python_dependencies import DependencyException, check_requirements
from synapse.util.module_loader import load_python_module

from ._base import Config, ConfigError


def _dict_merge(merge_dict, into_dict):
    """Do a deep merge of two dicts

    Recursively merges `merge_dict` into `into_dict`:
      * For keys where both `merge_dict` and `into_dict` have a dict value, the values
        are recursively merged
      * For all other keys, the values in `into_dict` (if any) are overwritten with
        the value from `merge_dict`.

    Args:
        merge_dict (dict): dict to merge
        into_dict (dict): target dict
    """
    for k, v in merge_dict.items():
        if k not in into_dict:
            into_dict[k] = v
            continue

        current_val = into_dict[k]

        if isinstance(v, dict) and isinstance(current_val, dict):
            _dict_merge(v, current_val)
            continue

        # otherwise we just overwrite
        into_dict[k] = v


class SAML2Config(Config):
    def read_config(self, config, **kwargs):
        self.saml2_enabled = False

        saml2_config = config.get("saml2_config")

        if not saml2_config or not saml2_config.get("enabled", True):
            return

        try:
            check_requirements("saml2")
        except DependencyException as e:
            raise ConfigError(e.message)

        self.saml2_enabled = True

        saml2_config_dict = self._default_saml_config_dict()
        _dict_merge(
            merge_dict=saml2_config.get("sp_config", {}), into_dict=saml2_config_dict
        )

        config_path = saml2_config.get("config_path", None)
        if config_path is not None:
            mod = load_python_module(config_path)
            _dict_merge(merge_dict=mod.CONFIG, into_dict=saml2_config_dict)

        import saml2.config

        self.saml2_sp_config = saml2.config.SPConfig()
        self.saml2_sp_config.load(saml2_config_dict)

        # session lifetime: in milliseconds
        self.saml2_session_lifetime = self.parse_duration(
            saml2_config.get("saml_session_lifetime", "5m")
        )

    def _default_saml_config_dict(self):
        import saml2

        public_baseurl = self.public_baseurl
        if public_baseurl is None:
            raise ConfigError("saml2_config requires a public_baseurl to be set")

        metadata_url = public_baseurl + "_matrix/saml2/metadata.xml"
        response_url = public_baseurl + "_matrix/saml2/authn_response"
        return {
            "entityid": metadata_url,
            "service": {
                "sp": {
                    "endpoints": {
                        "assertion_consumer_service": [
                            (response_url, saml2.BINDING_HTTP_POST)
                        ]
                    },
                    "required_attributes": ["uid"],
                    "optional_attributes": ["mail", "surname", "givenname"],
                }
            },
        }

    def generate_config_section(self, config_dir_path, server_name, **kwargs):
        return """\
        # Enable SAML2 for registration and login. Uses pysaml2.
        #
        # `sp_config` is the configuration for the pysaml2 Service Provider.
        # See pysaml2 docs for format of config.
        #
        # Default values will be used for the 'entityid' and 'service' settings,
        # so it is not normally necessary to specify them unless you need to
        # override them.
        #
        # Once SAML support is enabled, a metadata file will be exposed at
        # https://<server>:<port>/_matrix/saml2/metadata.xml, which you may be able to
        # use to configure your SAML IdP with. Alternatively, you can manually configure
        # the IdP to use an ACS location of
        # https://<server>:<port>/_matrix/saml2/authn_response.
        #
        #saml2_config:
        #  sp_config:
        #    # point this to the IdP's metadata. You can use either a local file or
        #    # (preferably) a URL.
        #    metadata:
        #      #local: ["saml2/idp.xml"]
        #      remote:
        #        - url: https://our_idp/metadata.xml
        #
        #    # By default, the user has to go to our login page first. If you'd like to
        #    # allow IdP-initiated login, set 'allow_unsolicited: True' in a
        #    # 'service.sp' section:
        #    #
        #    #service:
        #    #  sp:
        #    #    allow_unsolicited: True
        #
        #    # The examples below are just used to generate our metadata xml, and you
        #    # may well not need it, depending on your setup. Alternatively you
        #    # may need a whole lot more detail - see the pysaml2 docs!
        #
        #    description: ["My awesome SP", "en"]
        #    name: ["Test SP", "en"]
        #
        #    organization:
        #      name: Example com
        #      display_name:
        #        - ["Example co", "en"]
        #      url: "http://example.com"
        #
        #    contact_person:
        #      - given_name: Bob
        #        sur_name: "the Sysadmin"
        #        email_address": ["admin@example.com"]
        #        contact_type": technical
        #
        #  # Instead of putting the config inline as above, you can specify a
        #  # separate pysaml2 configuration file:
        #  #
        #  config_path: "%(config_dir_path)s/sp_conf.py"
        #
        #  # the lifetime of a SAML session. This defines how long a user has to
        #  # complete the authentication process, if allow_unsolicited is unset.
        #  # The default is 5 minutes.
        #  #
        #  # saml_session_lifetime: 5m
        """ % {
            "config_dir_path": config_dir_path
        }