php - Open ID Implementation PowerSchool PHP

Question

I have looked into the PowerSchool's documentation on OpenID implementation. However, I believe it misses out on vital information i.e., how do we pass the required attributes. I have looked into sample implementations in other platforms. But, they seem to be different from what the documentation is talking about.

How do I go about implementing PowerSchool's Open ID in PHP in this case. After much struggle, I have got the 3rd party site to successfully perform the handshake, however, no attribute values are being retrieved and there are no errors, not even in the logs.

Answer 1

PowerSchool's Open ID SSO (Single Sign On) currently only works if the request is initiated from PowerSchool's site. Therefore, start off with creating the Open ID link plugin.

---

SSO Link Plugin

<?xml version="1.0" encoding="UTF-8"?>
<plugin xmlns="http://plugin.powerschool.pearson.com"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation='http://plugin.powerschool.pearson.com plugin.xsd'
    name="Insert Your PluginsName"
    version="1.0.0"
    description="Insert a description here">
    <!-- The host name without scheme i.e., https. This is the host with which PowerSchool will perform the handshake -->
    <!-- and will pass the attributes to. -->
    <!-- NOTE: This host must have a valid SSL for this to work. -->
    <openid host="www.myopenid.com">
        <links>
            <link display-text="Insert links display text here"
                  title="Insert links title here"
                  path="/openidlogin">
                <!-- The relative path to the hostname Open ID initiation is performed on the host specified above i.e., -->
                <!-- www.myopenid.com/openidlogin -->
                <ui_contexts>
                    <!-- You may add other user contexts too i.e., guardian etc -->
                    <ui_context id="admin.header" />
                    <ui_context id="admin.left_nav" />
                </ui_contexts>
            </link>
        </links>
    </openid>
    <publisher name="XYZ">
        <contact email="xyzAtmyopenId.com"/>
    </publisher>
</plugin>

1. Save the above as a XML file.
2. Go to the admin site i.e., xyzps.com/admin/home.html
3. Navigate to System -> System Settings -> Plugin Management Configuration -> Install -> Install the plugin -> Enable the plugin.
4. The plugin should now be visible on the contexts provided in the ui_contexts i.e., Admin header and left navigation.

---

LightOpenID

Head over to LightOpenID and add it to your project.

---

Authentication with PowerSchool and Attributes Requests

On the path mentioned in the plugin for openid host i.e., /openidlogin add the required attributes and redirect to the authentication url:

$openid = new LightOpenID("Insert hostname i.e., www.myopenid.com");

$openid->identity = $_GET['openid_identifier'];

$openid->required = array(
    'email'=>'http://powerschool.com/entity/email'
);

$openid->returnUrl = 'Insert SSL enabled hostname i.e., https://www.myopenid.com/authenticateopenid';

header('Location: ' . $openid->authUrl());

---

Customize LightOpenID

Before proceeding we will need to modify the LightOpenID because it prefixes the attributes with http://axschema.org/ due to which no attribute value will be returned. To do this:

1. Navigate to LightOpenID.php -> axParams() and change

   $this->aliases[$alias] = 'http://axschema.org/' . $field;
   

   To

   $this->aliases[$alias] = $field;
   

2. Navigate to LightOpenID.php -> getAxAttributes() and change

   $key = substr($this->getItem($prefix . '_type_' . $key), $length);
   

   To

   $key = $this->getItem($prefix . '_type_' . $key);
   

---

Verify and Retrieve User's Attributes

On the path specified in Open ID's return URL i.e., authenticateopenid, verify the user and retrieve their attributes:

$openid = new LightOpenID("Insert hostname i.e., www.myopenid.com");

if ($openid->mode)
{
    if ($openid->mode == 'cancel') {
        echo "User has canceled authentication !";
    } elseif ($openid->validate()) {

        $data = $openid->getAttributes();
        $email = $data['http://powerschool.com/entity/email'];
        echo "</br>Email: " . $email . "</br>";

    }
     else {
        echo "The user has not logged in";
    }
}
else {
    echo "Go to PowerSchool to log in.";
}