193 lines
7 KiB
Markdown
193 lines
7 KiB
Markdown
<a href="https://travis-ci.org/catalyst/moodle-auth_userkey">
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<img src="https://travis-ci.org/catalyst/moodle-auth_userkey.svg?branch=master">
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</a>
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Log in to Moodle using one time user key.
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=========================================
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Auth plugin for organising simple one way SSO(single sign on) between moodle and your external web
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application. The main idea is to make a web call to moodle and provide one of the possible matching
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fields to find required user and generate one time login URL. A user can be redirected to this
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URL to be log in to Moodle without typing username and password.
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Using
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-----
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1. Install the plugin as usual.
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2. Enable and configure just installed plugin. Set required Mapping field, User key life time, IP restriction and Logout redirect URL.
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3. Enable web service advance feature (Admin > Advanced features), more info http://docs.moodle.org/en/Web_services
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4. Enable one of the supported protocols (Admin > Plugins > Web services > Manage protocols)
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5. Create a token for a specific user and for the service 'User key authentication web service' (Admin > Plugins > Web services > Manage tokens)
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6. Make sure that the "web service" user has 'auth/userkey:generatekey' capability.
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7. Configure your external application to make a web call to get login URL.
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8. Redirect your users to this URL to be logged in to Moodle.
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Configuration
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-------------
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**Mapping field**
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Required data structure for web call is related to mapping field you configured.
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For example XML-RPC (PHP structure) description for different mapping field settings:
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***User name***
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[user] =>
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Array
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(
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[username] => string
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)
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***Email Address***
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[user] =>
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Array
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(
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[email] => string
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)
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***ID number***
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[user] =>
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Array
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(
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[idnumber] => string
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)
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***Web service will return following structure or standard Moodle webservice error message.***
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Array
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(
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[loginurl] => string
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)
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Please navigate to API documentation to get full description for "auth_userkey_request_login_url" function.
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e.g. http://yourmoodle.com/admin/webservice/documentation.php
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You can amend login URL by "wantsurl" parameter to redirect user after they logged in to Moodle.
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E.g. http://yourmoodle.com/auth/userkey/login.php?key=uniquekey&wantsurl=http://yourmoodle.com/course/view.php?id=3
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Wantsurl maybe internal and external.
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**User key life time**
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This setting describes for how long a user key will be valid. If you try to use expired key then you will
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get an error.
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**IP restriction**
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If this setting is set to yes, then your web application has to provie user's ip address to generate a user key. Then
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the user should have provided ip when using this key. If ip address is different a user will get an error.
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**Redirect after logout from Moodle**
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You can set URL to redirect users after they logged out from Moodle. For example you can redirect them
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to logout script of your web application to log users out from it as well. This setting is optional.
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**URL of SSO host**
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You can set URL to redirect users before they see Moodle login page. For example you can redirect them
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to your web application to login page. You can use "enrolkey_skipsso" URL parameter to bypass this option.
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E.g. http://yourmoodle.com/login/index.php?enrolkey_skipsso=1
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**Logout URL**
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If you need to logout users after they logged out from the external application, you can redirect them
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to logout script with required parameter "return".
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E.g. http://yourmoodle.com/auth/userkey/logout.php?return=www.google.com
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Users will be logged out from Moodle and then redirected to the provided URL.
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In case when a user session is already expired, the user will be still redirected.
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**Example client**
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**Note:** the code below is not for production use. It's just a quick and dirty way to test the functionality.
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The code below defines a function that can be used to obtain a login url.
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You will need to add/remove parameters depending on whether you have update/create user enabled and which mapping field you are using.
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The required library curl can be obtained from https://github.com/moodlehq/sample-ws-clients
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```php
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/**
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* @param string $useremail Email address of user to create token for.
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* @param string $firstname First name of user (used to update/create user).
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* @param string $lastname Last name of user (used to update/create user).
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* @param string $username Username of user (used to update/create user).
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* @param string $ipaddress IP address of end user that login request will come from (probably $_SERVER['REMOTE_ADDR']).
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* @param int $courseid Course id to send logged in users to, defaults to site home.
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* @param int $modname Name of course module to send users to, defaults to none.
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* @param int $activityid cmid to send logged in users to, defaults to site home.
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* @return bool|string
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*/
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function getloginurl($useremail, $firstname, $lastname, $username, $courseid = null, $modname = null, $activityid = null) {
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require_once('curl.php');
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$token = 'YOUR_TOKEN';
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$domainname = 'http://MOODLE_WWW_ROOT';
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$functionname = 'auth_userkey_request_login_url';
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$param = [
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'user' => [
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'firstname' => $firstname, // You will not need this parameter, if you are not creating/updating users
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'lastname' => $lastname, // You will not need this parameter, if you are not creating/updating users
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'username' => $username,
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'email' => $useremail,
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]
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];
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$serverurl = $domainname . '/webservice/rest/server.php' . '?wstoken=' . $token . '&wsfunction=' . $functionname . '&moodlewsrestformat=json';
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$curl = new curl; // The required library curl can be obtained from https://github.com/moodlehq/sample-ws-clients
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try {
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$resp = $curl->post($serverurl, $param);
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$resp = json_decode($resp);
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if ($resp && !empty($resp->loginurl)) {
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$loginurl = $resp->loginurl;
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}
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} catch (Exception $ex) {
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return false;
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}
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if (!isset($loginurl)) {
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return false;
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}
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$path = '';
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if (isset($courseid)) {
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$path = '&wantsurl=' . urlencode("$domainname/course/view.php?id=$courseid");
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}
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if (isset($modname) && isset($activityid)) {
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$path = '&wantsurl=' . urlencode("$domainname/mod/$modname/view.php?id=$activityid");
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}
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return $loginurl . $path;
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}
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echo getloginurl('barrywhite@googlemail.com', 'barry', 'white', 'barrywhite', 2, 'certificate', 8);
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```
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# Crafted by Catalyst IT
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This plugin was developed by Catalyst IT Australia:
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https://www.catalyst-au.net/
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# Contributing and Support
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Issues, and pull requests using github are welcome and encouraged!
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https://github.com/catalyst/moodle-auth_userkey/issues
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If you would like commercial support or would like to sponsor additional improvements
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to this plugin please contact us:
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https://www.catalyst-au.net/contact-us
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