wazo-auth

wazo-auth is a scalable, extendable and configurable authentication service. It uses an HTTP interface to emit tokens to users who can then use those tokens to identify and authenticate themselves with other services compatible with wazo-auth.

The HTTP API reference is at http://api.wazo.community.

Usage

wazo-auth is used through HTTP requests, using HTTPS. Its default port is 9497. As a user, the most common operation is to get a new token. This is done with the POST method.

Alice retrieves a token using her username/password:

$ # Alice creates a new token, using the xivo_user backend, expiring in 10 minutes
$ curl -k -X POST -H 'Content-Type: application/json' -u 'alice:s3cre7' "https://localhost:9497/0.1/token" -d '{"backend": "xivo_user", "expiration": 600}';echo
{"data": {"issued_at": "2015-06-05T10:16:58.557553", "utc_issued_at": "2015-06-05T15:16:58.557553", "token": "1823c1ee-6c6a-0cdc-d869-964a7f08a744", "auth_id": "63f3dc3c-865d-419e-bec2-e18c4b118224", "xivo_user_uuid": "63f3dc3c-865d-419e-bec2-e18c4b118224", "expires_at": "2015-06-05T11:16:58.557595", "utc_expires_at": "2015-06-05T16:16:58.557595"}}

In this example Alice used here login alice and password s3cre7. The authentication source is determined by the backend in the POST data.

Alice could also have specified an expiration time on her POST request. The expiration value is the number of seconds before the token expires.

After retrieving her token, Alice can query other services that use wazo-auth and send her token to those service. Those services can then use this token on Alice’s behalf to access her personal storage.

If Alice wants to revoke her token before its expiration:

$ curl -k -X DELETE -H 'Content-Type: application/json' "https://localhost:9497/0.1/token/1823c1ee-6c6a-0cdc-d869-964a7f08a744"

See http://api.wazo.community for more details about the HTTP API.

See Service Authentication for details about the authentication process.

Usage for services using wazo-auth

A service that requires authentication and identification can use wazo-auth to externalise the burden of authentication. The new service can then accept a token as part of its operations to authenticate the user using the service.

Once a service receives a token from one of its user, it will need to check the validity of that token. There are 2 forms of verification, one that only checks if the token is valid and the other returns information about this token’s session if it is valid.

Checking if a token is valid:

$ curl -k -i -X HEAD -H 'Content-Type: application/json' "https://localhost:9497/0.1/token/1823c1ee-6c6a-0cdc-d869-964a7f08a744"
HTTP/1.1 204 NO CONTENT
Content-Type: text/html; charset=utf-8
Content-Length: 0
Date: Fri, 05 Jun 2015 14:49:50 GMT
Server: pcm-dev-0

$ # get more information about this token
$ curl -k -X GET -H 'Content-Type: application/json' "https://localhost:9497/0.1/token/1823c1ee-6c6a-0cdc-d869-964a7f08a744";echo
{"data": {"issued_at": "2015-06-05T10:16:58.557553", "utc_issued_at": "2015-06-05T15:16:58.557553", "token": "1823c1ee-6c6a-0cdc-d869-964a7f08a744", "auth_id": "63f3dc3c-865d-419e-bec2-e18c4b118224", "xivo_user_uuid": "63f3dc3c-865d-419e-bec2-e18c4b118224", "expires_at": "2015-06-05T11:16:58.557595", "utc_expires_at": "2015-06-05T16:16:58.557595"}}

Launching wazo-auth

usage: wazo-auth [-h] [-c CONFIG_FILE] [-u USER] [-d] [-f] [-l LOG_LEVEL]

optional arguments:
  -h, --help            show this help message and exit
  -c CONFIG_FILE, --config-file CONFIG_FILE
                        The path to the config file
  -u USER, --user USER  User to run the daemon
  -d, --debug           Log debug messages
  -f, --foreground      Foreground, don't daemonize
  -l LOG_LEVEL, --log-level LOG_LEVEL
                        Logs messages with LOG_LEVEL details. Must be one of:
                        critical, error, warning, info, debug. Default: None

Configuration

Policies

Policies can be assigned to backends in order to generate the appropriate permissions for a token created with this backend.

To change to policy associated to a backend, add a new configuration file in /etc/wazo-auth/conf.d with the following content:

backend_policies:
  <backend_name>: <policy_name>
  • backend_name: The name of the backend to associate to a new policy
  • policy_name: The name of the policy to assign to the backend

Note

Each backend may support different variables. A policy tailored for a user oriented backend will probably not be usable if assigned to an administrator backend.

Policies

A policy is a list of ACL templates that is used to generate the ACL of a token. Policies can be created, deleted or modified using the REST API.

ACL templates

ACL templates use jinja2 templates. Each backend is responsible of supplying a list of variables to the template engine for rendering.

A backend supplying the following variables:

{"uuid": "fd64193f-7260-4299-9bc2-87c0106e5302",
 "lines": [1, 42],
 "agent": {"id": 50, "number": "1001"}}

With the following ACL templates:

confd.users.{{ uuid }}.read
{% for line in lines %}confd.lines.{{ line }}.#:{% endfor %}
dird.me.#
{% if agent %}agentd.agents.by-id.{{ agent.id }}.read{% endif %}

Note

When using for loops to create ACL, make sure to add a : separator at the end of each ACL

Would create tokens with the following ACL:

confd.users.fd64193f-7260-4299-9bc2-87c0106e5302.read
confd.lines.1.#
confd.lines.42.#
dird.me.#
agentd.agentd.by-id.50.read

HTTP API Reference

The complete HTTP API documentation is at http://api.wazo.community.

See also the wazo-auth changelog.