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+<?php
+
+/**
+ * Simple registration request and response parsing and object
+ * representation.
+ *
+ * This module contains objects representing simple registration
+ * requests and responses that can be used with both OpenID relying
+ * parties and OpenID providers.
+ *
+ * 1. The relying party creates a request object and adds it to the
+ * {@link Auth_OpenID_AuthRequest} object before making the
+ * checkid request to the OpenID provider:
+ *
+ * $sreg_req = Auth_OpenID_SRegRequest::build(array('email'));
+ * $auth_request->addExtension($sreg_req);
+ *
+ * 2. The OpenID provider extracts the simple registration request
+ * from the OpenID request using {@link
+ * Auth_OpenID_SRegRequest::fromOpenIDRequest}, gets the user's
+ * approval and data, creates an {@link Auth_OpenID_SRegResponse}
+ * object and adds it to the id_res response:
+ *
+ * $sreg_req = Auth_OpenID_SRegRequest::fromOpenIDRequest(
+ * $checkid_request);
+ * // [ get the user's approval and data, informing the user that
+ * // the fields in sreg_response were requested ]
+ * $sreg_resp = Auth_OpenID_SRegResponse::extractResponse(
+ * $sreg_req, $user_data);
+ * $sreg_resp->toMessage($openid_response->fields);
+ *
+ * 3. The relying party uses {@link
+ * Auth_OpenID_SRegResponse::fromSuccessResponse} to extract the data
+ * from the OpenID response:
+ *
+ * $sreg_resp = Auth_OpenID_SRegResponse::fromSuccessResponse(
+ * $success_response);
+ *
+ * @package OpenID
+ */
+
+/**
+ * Import message and extension internals.
+ */
+require_once 'Auth/OpenID/Message.php';
+require_once 'Auth/OpenID/Extension.php';
+
+// The data fields that are listed in the sreg spec
+global $Auth_OpenID_sreg_data_fields;
+$Auth_OpenID_sreg_data_fields = array(
+ 'fullname' => 'Full Name',
+ 'nickname' => 'Nickname',
+ 'dob' => 'Date of Birth',
+ 'email' => 'E-mail Address',
+ 'gender' => 'Gender',
+ 'postcode' => 'Postal Code',
+ 'country' => 'Country',
+ 'language' => 'Language',
+ 'timezone' => 'Time Zone');
+
+/**
+ * Check to see that the given value is a valid simple registration
+ * data field name. Return true if so, false if not.
+ */
+function Auth_OpenID_checkFieldName($field_name)
+{
+ global $Auth_OpenID_sreg_data_fields;
+
+ if (!in_array($field_name, array_keys($Auth_OpenID_sreg_data_fields))) {
+ return false;
+ }
+ return true;
+}
+
+// URI used in the wild for Yadis documents advertising simple
+// registration support
+define('Auth_OpenID_SREG_NS_URI_1_0', 'http://openid.net/sreg/1.0');
+
+// URI in the draft specification for simple registration 1.1
+// <http://openid.net/specs/openid-simple-registration-extension-1_1-01.html>
+define('Auth_OpenID_SREG_NS_URI_1_1', 'http://openid.net/extensions/sreg/1.1');
+
+// This attribute will always hold the preferred URI to use when
+// adding sreg support to an XRDS file or in an OpenID namespace
+// declaration.
+define('Auth_OpenID_SREG_NS_URI', Auth_OpenID_SREG_NS_URI_1_1);
+
+Auth_OpenID_registerNamespaceAlias(Auth_OpenID_SREG_NS_URI_1_1, 'sreg');
+
+/**
+ * Does the given endpoint advertise support for simple
+ * registration?
+ *
+ * $endpoint: The endpoint object as returned by OpenID discovery.
+ * returns whether an sreg type was advertised by the endpoint
+ */
+function Auth_OpenID_supportsSReg($endpoint)
+{
+ return ($endpoint->usesExtension(Auth_OpenID_SREG_NS_URI_1_1) ||
+ $endpoint->usesExtension(Auth_OpenID_SREG_NS_URI_1_0));
+}
+
+/**
+ * A base class for classes dealing with Simple Registration protocol
+ * messages.
+ *
+ * @package OpenID
+ */
+class Auth_OpenID_SRegBase extends Auth_OpenID_Extension {
+ /**
+ * Extract the simple registration namespace URI from the given
+ * OpenID message. Handles OpenID 1 and 2, as well as both sreg
+ * namespace URIs found in the wild, as well as missing namespace
+ * definitions (for OpenID 1)
+ *
+ * $message: The OpenID message from which to parse simple
+ * registration fields. This may be a request or response message.
+ *
+ * Returns the sreg namespace URI for the supplied message. The
+ * message may be modified to define a simple registration
+ * namespace.
+ *
+ * @access private
+ */
+ static function _getSRegNS($message)
+ {
+ $alias = null;
+ $found_ns_uri = null;
+
+ // See if there exists an alias for one of the two defined
+ // simple registration types.
+ foreach (array(Auth_OpenID_SREG_NS_URI_1_1,
+ Auth_OpenID_SREG_NS_URI_1_0) as $sreg_ns_uri) {
+ $alias = $message->namespaces->getAlias($sreg_ns_uri);
+ if ($alias !== null) {
+ $found_ns_uri = $sreg_ns_uri;
+ break;
+ }
+ }
+
+ if ($alias === null) {
+ // There is no alias for either of the types, so try to
+ // add one. We default to using the modern value (1.1)
+ $found_ns_uri = Auth_OpenID_SREG_NS_URI_1_1;
+ if ($message->namespaces->addAlias(Auth_OpenID_SREG_NS_URI_1_1,
+ 'sreg') === null) {
+ // An alias for the string 'sreg' already exists, but
+ // it's defined for something other than simple
+ // registration
+ return null;
+ }
+ }
+
+ return $found_ns_uri;
+ }
+}
+
+/**
+ * An object to hold the state of a simple registration request.
+ *
+ * required: A list of the required fields in this simple registration
+ * request
+ *
+ * optional: A list of the optional fields in this simple registration
+ * request
+ *
+ * @package OpenID
+ */
+class Auth_OpenID_SRegRequest extends Auth_OpenID_SRegBase {
+
+ var $ns_alias = 'sreg';
+
+ /**
+ * Initialize an empty simple registration request.
+ */
+ static function build($required=null, $optional=null,
+ $policy_url=null,
+ $sreg_ns_uri=Auth_OpenID_SREG_NS_URI,
+ $cls='Auth_OpenID_SRegRequest')
+ {
+ $obj = new $cls();
+
+ $obj->required = array();
+ $obj->optional = array();
+ $obj->policy_url = $policy_url;
+ $obj->ns_uri = $sreg_ns_uri;
+
+ if ($required) {
+ if (!$obj->requestFields($required, true, true)) {
+ return null;
+ }
+ }
+
+ if ($optional) {
+ if (!$obj->requestFields($optional, false, true)) {
+ return null;
+ }
+ }
+
+ return $obj;
+ }
+
+ /**
+ * Create a simple registration request that contains the fields
+ * that were requested in the OpenID request with the given
+ * arguments
+ *
+ * $request: The OpenID authentication request from which to
+ * extract an sreg request.
+ *
+ * $cls: name of class to use when creating sreg request object.
+ * Used for testing.
+ *
+ * Returns the newly created simple registration request
+ */
+ static function fromOpenIDRequest($request, $cls='Auth_OpenID_SRegRequest')
+ {
+
+ $obj = call_user_func_array(array($cls, 'build'),
+ array(null, null, null, Auth_OpenID_SREG_NS_URI, $cls));
+
+ // Since we're going to mess with namespace URI mapping, don't
+ // mutate the object that was passed in.
+ $m = $request->message;
+
+ $obj->ns_uri = $obj->_getSRegNS($m);
+ $args = $m->getArgs($obj->ns_uri);
+
+ if ($args === null || Auth_OpenID::isFailure($args)) {
+ return null;
+ }
+
+ $obj->parseExtensionArgs($args);
+
+ return $obj;
+ }
+
+ /**
+ * Parse the unqualified simple registration request parameters
+ * and add them to this object.
+ *
+ * This method is essentially the inverse of
+ * getExtensionArgs. This method restores the serialized simple
+ * registration request fields.
+ *
+ * If you are extracting arguments from a standard OpenID
+ * checkid_* request, you probably want to use fromOpenIDRequest,
+ * which will extract the sreg namespace and arguments from the
+ * OpenID request. This method is intended for cases where the
+ * OpenID server needs more control over how the arguments are
+ * parsed than that method provides.
+ *
+ * $args == $message->getArgs($ns_uri);
+ * $request->parseExtensionArgs($args);
+ *
+ * $args: The unqualified simple registration arguments
+ *
+ * strict: Whether requests with fields that are not defined in
+ * the simple registration specification should be tolerated (and
+ * ignored)
+ */
+ function parseExtensionArgs($args, $strict=false)
+ {
+ foreach (array('required', 'optional') as $list_name) {
+ $required = ($list_name == 'required');
+ $items = Auth_OpenID::arrayGet($args, $list_name);
+ if ($items) {
+ foreach (explode(',', $items) as $field_name) {
+ if (!$this->requestField($field_name, $required, $strict)) {
+ if ($strict) {
+ return false;
+ }
+ }
+ }
+ }
+ }
+
+ $this->policy_url = Auth_OpenID::arrayGet($args, 'policy_url');
+
+ return true;
+ }
+
+ /**
+ * A list of all of the simple registration fields that were
+ * requested, whether they were required or optional.
+ */
+ function allRequestedFields()
+ {
+ return array_merge($this->required, $this->optional);
+ }
+
+ /**
+ * Have any simple registration fields been requested?
+ */
+ function wereFieldsRequested()
+ {
+ return count($this->allRequestedFields());
+ }
+
+ /**
+ * Was this field in the request?
+ */
+ function contains($field_name)
+ {
+ return (in_array($field_name, $this->required) ||
+ in_array($field_name, $this->optional));
+ }
+
+ /**
+ * Request the specified field from the OpenID user
+ *
+ * $field_name: the unqualified simple registration field name
+ *
+ * required: whether the given field should be presented to the
+ * user as being a required to successfully complete the request
+ *
+ * strict: whether to raise an exception when a field is added to
+ * a request more than once
+ */
+ function requestField($field_name,
+ $required=false, $strict=false)
+ {
+ if (!Auth_OpenID_checkFieldName($field_name)) {
+ return false;
+ }
+
+ if ($strict) {
+ if ($this->contains($field_name)) {
+ return false;
+ }
+ } else {
+ if (in_array($field_name, $this->required)) {
+ return true;
+ }
+
+ if (in_array($field_name, $this->optional)) {
+ if ($required) {
+ unset($this->optional[array_search($field_name,
+ $this->optional)]);
+ } else {
+ return true;
+ }
+ }
+ }
+
+ if ($required) {
+ $this->required[] = $field_name;
+ } else {
+ $this->optional[] = $field_name;
+ }
+
+ return true;
+ }
+
+ /**
+ * Add the given list of fields to the request
+ *
+ * field_names: The simple registration data fields to request
+ *
+ * required: Whether these values should be presented to the user
+ * as required
+ *
+ * strict: whether to raise an exception when a field is added to
+ * a request more than once
+ */
+ function requestFields($field_names, $required=false, $strict=false)
+ {
+ if (!is_array($field_names)) {
+ return false;
+ }
+
+ foreach ($field_names as $field_name) {
+ if (!$this->requestField($field_name, $required, $strict=$strict)) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * Get a dictionary of unqualified simple registration arguments
+ * representing this request.
+ *
+ * This method is essentially the inverse of
+ * C{L{parseExtensionArgs}}. This method serializes the simple
+ * registration request fields.
+ */
+ function getExtensionArgs()
+ {
+ $args = array();
+
+ if ($this->required) {
+ $args['required'] = implode(',', $this->required);
+ }
+
+ if ($this->optional) {
+ $args['optional'] = implode(',', $this->optional);
+ }
+
+ if ($this->policy_url) {
+ $args['policy_url'] = $this->policy_url;
+ }
+
+ return $args;
+ }
+}
+
+/**
+ * Represents the data returned in a simple registration response
+ * inside of an OpenID C{id_res} response. This object will be created
+ * by the OpenID server, added to the C{id_res} response object, and
+ * then extracted from the C{id_res} message by the Consumer.
+ *
+ * @package OpenID
+ */
+class Auth_OpenID_SRegResponse extends Auth_OpenID_SRegBase {
+
+ var $ns_alias = 'sreg';
+
+ function Auth_OpenID_SRegResponse($data=null,
+ $sreg_ns_uri=Auth_OpenID_SREG_NS_URI)
+ {
+ if ($data === null) {
+ $this->data = array();
+ } else {
+ $this->data = $data;
+ }
+
+ $this->ns_uri = $sreg_ns_uri;
+ }
+
+ /**
+ * Take a C{L{SRegRequest}} and a dictionary of simple
+ * registration values and create a C{L{SRegResponse}} object
+ * containing that data.
+ *
+ * request: The simple registration request object
+ *
+ * data: The simple registration data for this response, as a
+ * dictionary from unqualified simple registration field name to
+ * string (unicode) value. For instance, the nickname should be
+ * stored under the key 'nickname'.
+ */
+ static function extractResponse($request, $data)
+ {
+ $obj = new Auth_OpenID_SRegResponse();
+ $obj->ns_uri = $request->ns_uri;
+
+ foreach ($request->allRequestedFields() as $field) {
+ $value = Auth_OpenID::arrayGet($data, $field);
+ if ($value !== null) {
+ $obj->data[$field] = $value;
+ }
+ }
+
+ return $obj;
+ }
+
+ /**
+ * Create a C{L{SRegResponse}} object from a successful OpenID
+ * library response
+ * (C{L{openid.consumer.consumer.SuccessResponse}}) response
+ * message
+ *
+ * success_response: A SuccessResponse from consumer.complete()
+ *
+ * signed_only: Whether to process only data that was
+ * signed in the id_res message from the server.
+ *
+ * Returns a simple registration response containing the data that
+ * was supplied with the C{id_res} response.
+ */
+ static function fromSuccessResponse($success_response, $signed_only=true)
+ {
+ global $Auth_OpenID_sreg_data_fields;
+
+ $obj = new Auth_OpenID_SRegResponse();
+ $obj->ns_uri = $obj->_getSRegNS($success_response->message);
+
+ if ($signed_only) {
+ $args = $success_response->getSignedNS($obj->ns_uri);
+ } else {
+ $args = $success_response->message->getArgs($obj->ns_uri);
+ }
+
+ if ($args === null || Auth_OpenID::isFailure($args)) {
+ return null;
+ }
+
+ foreach ($Auth_OpenID_sreg_data_fields as $field_name => $desc) {
+ if (in_array($field_name, array_keys($args))) {
+ $obj->data[$field_name] = $args[$field_name];
+ }
+ }
+
+ return $obj;
+ }
+
+ function getExtensionArgs()
+ {
+ return $this->data;
+ }
+
+ // Read-only dictionary interface
+ function get($field_name, $default=null)
+ {
+ if (!Auth_OpenID_checkFieldName($field_name)) {
+ return null;
+ }
+
+ return Auth_OpenID::arrayGet($this->data, $field_name, $default);
+ }
+
+ function contents()
+ {
+ return $this->data;
+ }
+}
+
+