library/oauth.php is not in use as well.
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<?php
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//ini_set('display_errors', 1);
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//error_reporting(E_ALL | E_STRICT);
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// Regex to filter out the client identifier
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// (described in Section 2 of IETF draft)
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// IETF draft does not prescribe a format for these, however
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// I've arbitrarily chosen alphanumeric strings with hyphens and underscores, 3-12 characters long
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// Feel free to change.
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define("REGEX_CLIENT_ID", "/^[a-z0-9-_]{3,12}$/i");
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// Used to define the name of the OAuth access token parameter (POST/GET/etc.)
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// IETF Draft sections 5.2 and 5.3 specify that it should be called "oauth_token"
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// but other implementations use things like "access_token"
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// I won't be heartbroken if you change it, but it might be better to adhere to the spec
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define("OAUTH_TOKEN_PARAM_NAME", "oauth_token");
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// Client types (for client authorization)
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//define("WEB_SERVER_CLIENT_TYPE", "web_server");
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//define("USER_AGENT_CLIENT_TYPE", "user_agent");
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//define("REGEX_CLIENT_TYPE", "/^(web_server|user_agent)$/");
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define("ACCESS_TOKEN_AUTH_RESPONSE_TYPE", "token");
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define("AUTH_CODE_AUTH_RESPONSE_TYPE", "code");
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define("CODE_AND_TOKEN_AUTH_RESPONSE_TYPE", "code-and-token");
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define("REGEX_AUTH_RESPONSE_TYPE", "/^(token|code|code-and-token)$/");
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// Grant Types (for token obtaining)
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define("AUTH_CODE_GRANT_TYPE", "authorization-code");
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define("USER_CREDENTIALS_GRANT_TYPE", "basic-credentials");
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define("ASSERTION_GRANT_TYPE", "assertion");
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define("REFRESH_TOKEN_GRANT_TYPE", "refresh-token");
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define("NONE_GRANT_TYPE", "none");
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define("REGEX_TOKEN_GRANT_TYPE", "/^(authorization-code|basic-credentials|assertion|refresh-token|none)$/");
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/* Error handling constants */
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// HTTP status codes
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define("ERROR_NOT_FOUND", "404 Not Found");
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define("ERROR_BAD_REQUEST", "400 Bad Request");
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// TODO: Extend for i18n
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// "Official" OAuth 2.0 errors
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define("ERROR_REDIRECT_URI_MISMATCH", "redirect-uri-mismatch");
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define("ERROR_INVALID_CLIENT_CREDENTIALS", "invalid-client-credentials");
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define("ERROR_UNAUTHORIZED_CLIENT", "unauthorized-client");
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define("ERROR_USER_DENIED", "access-denied");
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define("ERROR_INVALID_REQUEST", "invalid-request");
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define("ERROR_INVALID_CLIENT_ID", "invalid-client-id");
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define("ERROR_UNSUPPORTED_RESPONSE_TYPE", "unsupported-response-type");
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define("ERROR_INVALID_SCOPE", "invalid-scope");
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define("ERROR_INVALID_GRANT", "invalid-grant");
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// Protected resource errors
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define("ERROR_INVALID_TOKEN", "invalid-token");
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define("ERROR_EXPIRED_TOKEN", "expired-token");
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define("ERROR_INSUFFICIENT_SCOPE", "insufficient-scope");
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// Messages
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define("ERROR_INVALID_RESPONSE_TYPE", "Invalid response type.");
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// Errors that we made up
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// Error for trying to use a grant type that we haven't implemented
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define("ERROR_UNSUPPORTED_GRANT_TYPE", "unsupported-grant-type");
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abstract class OAuth2 {
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/* Subclasses must implement the following functions */
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// Make sure that the client id is valid
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// If a secret is required, check that they've given the right one
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// Must return false if the client credentials are invalid
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abstract protected function auth_client_credentials($client_id, $client_secret = null);
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// OAuth says we should store request URIs for each registered client
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// Implement this function to grab the stored URI for a given client id
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// Must return false if the given client does not exist or is invalid
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abstract protected function get_redirect_uri($client_id);
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// We need to store and retrieve access token data as we create and verify tokens
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// Implement these functions to do just that
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// Look up the supplied token id from storage, and return an array like:
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//
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// array(
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// "client_id" => <stored client id>,
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// "expires" => <stored expiration timestamp>,
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// "scope" => <stored scope (may be null)
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// )
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//
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// Return null if the supplied token is invalid
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//
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abstract protected function get_access_token($token_id);
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// Store the supplied values
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abstract protected function store_access_token($token_id, $client_id, $expires, $scope = null);
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/*
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*
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* Stuff that should get overridden by subclasses
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*
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* I don't want to make these abstract, because then subclasses would have
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* to implement all of them, which is too much work.
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*
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* So they're just stubs. Override the ones you need.
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*
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*/
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// You should override this function with something,
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// or else your OAuth provider won't support any grant types!
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protected function get_supported_grant_types() {
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// If you support all grant types, then you'd do:
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// return array(
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// AUTH_CODE_GRANT_TYPE,
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// USER_CREDENTIALS_GRANT_TYPE,
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// ASSERTION_GRANT_TYPE,
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// REFRESH_TOKEN_GRANT_TYPE,
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// NONE_GRANT_TYPE
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// );
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return array();
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}
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// You should override this function with your supported response types
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protected function get_supported_auth_response_types() {
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return array(
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AUTH_CODE_AUTH_RESPONSE_TYPE,
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ACCESS_TOKEN_AUTH_RESPONSE_TYPE,
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CODE_AND_TOKEN_AUTH_RESPONSE_TYPE
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);
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}
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// If you want to support scope use, then have this function return a list
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// of all acceptable scopes (used to throw the invalid-scope error)
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protected function get_supported_scopes() {
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// Example:
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// return array("my-friends", "photos", "whatever-else");
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return array();
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}
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// If you want to restrict clients to certain authorization response types,
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// override this function
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// Given a client identifier and auth type, return true or false
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// (auth type would be one of the values contained in REGEX_AUTH_RESPONSE_TYPE)
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protected function authorize_client_response_type($client_id, $response_type) {
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return true;
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}
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// If you want to restrict clients to certain grant types, override this function
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// Given a client identifier and grant type, return true or false
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protected function authorize_client($client_id, $grant_type) {
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return true;
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}
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/* Functions that help grant access tokens for various grant types */
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// Fetch authorization code data (probably the most common grant type)
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// IETF Draft 4.1.1: http://tools.ietf.org/html/draft-ietf-oauth-v2-08#section-4.1.1
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// Required for AUTH_CODE_GRANT_TYPE
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protected function get_stored_auth_code($code) {
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// Retrieve the stored data for the given authorization code
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// Should return:
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//
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// array (
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// "client_id" => <stored client id>,
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// "redirect_uri" => <stored redirect URI>,
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// "expires" => <stored code expiration time>,
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// "scope" => <stored scope values (space-separated string), or can be omitted if scope is unused>
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// )
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//
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// Return null if the code is invalid.
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return null;
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}
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// Take the provided authorization code values and store them somewhere (db, etc.)
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// Required for AUTH_CODE_GRANT_TYPE
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protected function store_auth_code($code, $client_id, $redirect_uri, $expires, $scope) {
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// This function should be the storage counterpart to get_stored_auth_code
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// If storage fails for some reason, we're not currently checking
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// for any sort of success/failure, so you should bail out of the
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// script and provide a descriptive fail message
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}
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// Grant access tokens for basic user credentials
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// IETF Draft 4.1.2: http://tools.ietf.org/html/draft-ietf-oauth-v2-08#section-4.1.2
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// Required for USER_CREDENTIALS_GRANT_TYPE
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protected function check_user_credentials($client_id, $username, $password) {
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// Check the supplied username and password for validity
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// You can also use the $client_id param to do any checks required
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// based on a client, if you need that
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// If the username and password are invalid, return false
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// If the username and password are valid, and you want to verify the scope of
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// a user's access, return an array with the scope values, like so:
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//
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// array (
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// "scope" => <stored scope values (space-separated string)>
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// )
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//
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// We'll check the scope you provide against the requested scope before
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// providing an access token.
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//
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// Otherwise, just return true.
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return false;
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}
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// Grant access tokens for assertions
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// IETF Draft 4.1.3: http://tools.ietf.org/html/draft-ietf-oauth-v2-08#section-4.1.3
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// Required for ASSERTION_GRANT_TYPE
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protected function check_assertion($client_id, $assertion_type, $assertion) {
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// Check the supplied assertion for validity
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// You can also use the $client_id param to do any checks required
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// based on a client, if you need that
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// If the assertion is invalid, return false
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// If the assertion is valid, and you want to verify the scope of
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// an access request, return an array with the scope values, like so:
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//
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// array (
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// "scope" => <stored scope values (space-separated string)>
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// )
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//
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// We'll check the scope you provide against the requested scope before
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// providing an access token.
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//
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// Otherwise, just return true.
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return false;
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}
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// Grant refresh access tokens
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// IETF Draft 4.1.4: http://tools.ietf.org/html/draft-ietf-oauth-v2-08#section-4.1.4
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// Required for REFRESH_TOKEN_GRANT_TYPE
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protected function get_refresh_token($refresh_token) {
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// Retrieve the stored data for the given refresh token
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// Should return:
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//
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// array (
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// "client_id" => <stored client id>,
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// "expires" => <refresh token expiration time>,
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// "scope" => <stored scope values (space-separated string), or can be omitted if scope is unused>
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// )
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//
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// Return null if the token id is invalid.
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return null;
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}
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// Store refresh access tokens
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// Required for REFRESH_TOKEN_GRANT_TYPE
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protected function store_refresh_token($token, $client_id, $expires, $scope = null) {
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// If storage fails for some reason, we're not currently checking
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// for any sort of success/failure, so you should bail out of the
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// script and provide a descriptive fail message
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return;
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}
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// Grant access tokens for the "none" grant type
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// Not really described in the IETF Draft, so I just left a method stub...do whatever you want!
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// Required for NONE_GRANT_TYPE
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protected function check_none_access($client_id) {
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return false;
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}
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protected function get_default_authentication_realm() {
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// Change this to whatever authentication realm you want to send in a WWW-Authenticate header
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return "Service";
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}
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/* End stuff that should get overridden */
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private $access_token_lifetime = 3600;
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private $auth_code_lifetime = 30;
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private $refresh_token_lifetime = 1209600; // Two weeks
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public function __construct($access_token_lifetime = 3600, $auth_code_lifetime = 30, $refresh_token_lifetime = 1209600) {
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$this->access_token_lifetime = $access_token_lifetime;
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$this->auth_code_lifetime = $auth_code_lifetime;
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$this->refresh_token_lifetime = $refresh_token_lifetime;
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}
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/* Resource protecting (Section 5) */
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// Check that a valid access token has been provided
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//
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// The scope parameter defines any required scope that the token must have
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// If a scope param is provided and the token does not have the required scope,
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// we bounce the request
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//
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// Some implementations may choose to return a subset of the protected resource
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// (i.e. "public" data) if the user has not provided an access token
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// or if the access token is invalid or expired
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//
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// The IETF spec says that we should send a 401 Unauthorized header and bail immediately
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// so that's what the defaults are set to
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//
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// Here's what each parameter does:
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// $scope = A space-separated string of required scope(s), if you want to check for scope
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// $exit_not_present = If true and no access token is provided, send a 401 header and exit, otherwise return false
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// $exit_invalid = If true and the implementation of get_access_token returns null, exit, otherwise return false
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// $exit_expired = If true and the access token has expired, exit, otherwise return false
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// $exit_scope = If true the access token does not have the required scope(s), exit, otherwise return false
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// $realm = If you want to specify a particular realm for the WWW-Authenticate header, supply it here
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public function verify_access_token($scope = null, $exit_not_present = true, $exit_invalid = true, $exit_expired = true, $exit_scope = true, $realm = null) {
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$token_param = $this->get_access_token_param();
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if ($token_param === false) // Access token was not provided
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return $exit_not_present ? $this->send_401_unauthorized($realm, $scope) : false;
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// Get the stored token data (from the implementing subclass)
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$token = $this->get_access_token($token_param);
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if ($token === null)
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return $exit_invalid ? $this->send_401_unauthorized($realm, $scope, ERROR_INVALID_TOKEN) : false;
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// Check token expiration (I'm leaving this check separated, later we'll fill in better error messages)
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if (isset($token["expires"]) && time() > $token["expires"])
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return $exit_expired ? $this->send_401_unauthorized($realm, $scope, ERROR_EXPIRED_TOKEN) : false;
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// Check scope, if provided
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// If token doesn't have a scope, it's null/empty, or it's insufficient, then throw an error
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if ($scope &&
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(!isset($token["scope"]) || !$token["scope"] || !$this->check_scope($scope, $token["scope"])))
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return $exit_scope ? $this->send_401_unauthorized($realm, $scope, ERROR_INSUFFICIENT_SCOPE) : false;
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return true;
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}
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// Returns true if everything in required scope is contained in available scope
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// False if something in required scope is not in available scope
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private function check_scope($required_scope, $available_scope) {
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// The required scope should match or be a subset of the available scope
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if (!is_array($required_scope))
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$required_scope = explode(" ", $required_scope);
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if (!is_array($available_scope))
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$available_scope = explode(" ", $available_scope);
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return (count(array_diff($required_scope, $available_scope)) == 0);
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}
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// Send a 401 unauthorized header with the given realm
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// and an error, if provided
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private function send_401_unauthorized($realm, $scope, $error = null) {
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$realm = $realm === null ? $this->get_default_authentication_realm() : $realm;
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$auth_header = "WWW-Authenticate: Token realm='".$realm."'";
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if ($scope)
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$auth_header .= ", scope='".$scope."'";
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|
||||||
if ($error !== null)
|
|
||||||
$auth_header .= ", error='".$error."'";
|
|
||||||
|
|
||||||
header("HTTP/1.1 401 Unauthorized");
|
|
||||||
header($auth_header);
|
|
||||||
|
|
||||||
exit;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Pulls the access token out of the HTTP request
|
|
||||||
// Either from the Authorization header or GET/POST/etc.
|
|
||||||
// Returns false if no token is present
|
|
||||||
// TODO: Support POST or DELETE
|
|
||||||
private function get_access_token_param() {
|
|
||||||
$auth_header = $this->get_authorization_header();
|
|
||||||
|
|
||||||
if ($auth_header !== false) {
|
|
||||||
// Make sure only the auth header is set
|
|
||||||
if (isset($_GET[OAUTH_TOKEN_PARAM_NAME]) || isset($_POST[OAUTH_TOKEN_PARAM_NAME]))
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
$auth_header = trim($auth_header);
|
|
||||||
|
|
||||||
// Make sure it's Token authorization
|
|
||||||
if (strcmp(substr($auth_header, 0, 6),"Token ") !== 0)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
// Parse the rest of the header
|
|
||||||
if (preg_match('/\s*token\s*="(.+)"/', substr($auth_header, 6), $matches) == 0 || count($matches) < 2)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
return $matches[1];
|
|
||||||
}
|
|
||||||
|
|
||||||
if (isset($_GET[OAUTH_TOKEN_PARAM_NAME])) {
|
|
||||||
if (isset($_POST[OAUTH_TOKEN_PARAM_NAME])) // Both GET and POST are not allowed
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
return $_GET[OAUTH_TOKEN_PARAM_NAME];
|
|
||||||
}
|
|
||||||
|
|
||||||
if (isset($_POST[OAUTH_TOKEN_PARAM_NAME]))
|
|
||||||
return $_POST[OAUTH_TOKEN_PARAM_NAME];
|
|
||||||
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Access token granting (Section 4) */
|
|
||||||
|
|
||||||
// Grant or deny a requested access token
|
|
||||||
// This would be called from the "/token" endpoint as defined in the spec
|
|
||||||
// Obviously, you can call your endpoint whatever you want
|
|
||||||
public function grant_access_token() {
|
|
||||||
$filters = array(
|
|
||||||
"grant_type" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => REGEX_TOKEN_GRANT_TYPE), "flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"scope" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"code" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"redirect_uri" => array("filter" => FILTER_VALIDATE_URL, "flags" => array(FILTER_FLAG_SCHEME_REQUIRED, FILTER_REQUIRE_SCALAR)),
|
|
||||||
"username" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"password" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"assertion_type" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"assertion" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"refresh_token" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
);
|
|
||||||
|
|
||||||
$input = filter_input_array(INPUT_POST, $filters);
|
|
||||||
|
|
||||||
// Grant Type must be specified.
|
|
||||||
if (!$input["grant_type"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
// Make sure we've implemented the requested grant type
|
|
||||||
if (!in_array($input["grant_type"], $this->get_supported_grant_types()))
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_UNSUPPORTED_GRANT_TYPE);
|
|
||||||
|
|
||||||
// Authorize the client
|
|
||||||
$client = $this->get_client_credentials();
|
|
||||||
|
|
||||||
if ($this->auth_client_credentials($client[0], $client[1]) === false)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_CLIENT_CREDENTIALS);
|
|
||||||
|
|
||||||
if (!$this->authorize_client($client[0], $input["grant_type"]))
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_UNAUTHORIZED_CLIENT);
|
|
||||||
|
|
||||||
// Do the granting
|
|
||||||
switch ($input["grant_type"]) {
|
|
||||||
case AUTH_CODE_GRANT_TYPE:
|
|
||||||
if (!$input["code"] || !$input["redirect_uri"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
$stored = $this->get_stored_auth_code($input["code"]);
|
|
||||||
|
|
||||||
if ($stored === null || $input["redirect_uri"] != $stored["redirect_uri"] || $client[0] != $stored["client_id"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
if ($stored["expires"] > time())
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
break;
|
|
||||||
case USER_CREDENTIALS_GRANT_TYPE:
|
|
||||||
if (!$input["username"] || !$input["password"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
$stored = $this->check_user_credentials($client[0], $input["username"], $input["password"]);
|
|
||||||
|
|
||||||
if ($stored === false)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
break;
|
|
||||||
case ASSERTION_GRANT_TYPE:
|
|
||||||
if (!$input["assertion_type"] || !$input["assertion"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
$stored = $this->check_assertion($client[0], $input["assertion_type"], $input["assertion"]);
|
|
||||||
|
|
||||||
if ($stored === false)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
break;
|
|
||||||
case REFRESH_TOKEN_GRANT_TYPE:
|
|
||||||
if (!$input["refresh_token"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
$stored = $this->get_refresh_token($input["refresh_token"]);
|
|
||||||
|
|
||||||
if ($stored === null || $client[0] != $stored["client_id"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
if ($stored["expires"] > time())
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_GRANT);
|
|
||||||
|
|
||||||
break;
|
|
||||||
case NONE_GRANT_TYPE:
|
|
||||||
$stored = $this->check_none_access($client[0]);
|
|
||||||
|
|
||||||
if ($stored === false)
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Check scope, if provided
|
|
||||||
if ($input["scope"] && (!is_array($stored) || !isset($stored["scope"]) || !$this->check_scope($input["scope"], $stored["scope"])))
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_SCOPE);
|
|
||||||
|
|
||||||
if (!$input["scope"])
|
|
||||||
$input["scope"] = null;
|
|
||||||
|
|
||||||
$token = $this->create_access_token($client[0], $input["scope"]);
|
|
||||||
|
|
||||||
$this->send_json_headers();
|
|
||||||
echo json_encode($token);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Internal function used to get the client credentials from HTTP basic auth or POST data
|
|
||||||
// See http://tools.ietf.org/html/draft-ietf-oauth-v2-08#section-2
|
|
||||||
private function get_client_credentials() {
|
|
||||||
if (isset($_SERVER["PHP_AUTH_USER"]) && $_POST && isset($_POST["client_id"]))
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_CLIENT_CREDENTIALS);
|
|
||||||
|
|
||||||
// Try basic auth
|
|
||||||
if (isset($_SERVER["PHP_AUTH_USER"]))
|
|
||||||
return array($_SERVER["PHP_AUTH_USER"], $_SERVER["PHP_AUTH_PW"]);
|
|
||||||
|
|
||||||
// Try POST
|
|
||||||
if ($_POST && isset($_POST["client_id"])) {
|
|
||||||
if (isset($_POST["client_secret"]))
|
|
||||||
return array($_POST["client_id"], $_POST["client_secret"]);
|
|
||||||
|
|
||||||
return array($_POST["client_id"], NULL);
|
|
||||||
}
|
|
||||||
|
|
||||||
// No credentials were specified
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_CLIENT_CREDENTIALS);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* End-user/client Authorization (Section 3 of IETF Draft) */
|
|
||||||
|
|
||||||
// Pull the authorization request data out of the HTTP request
|
|
||||||
// and return it so the authorization server can prompt the user
|
|
||||||
// for approval
|
|
||||||
public function get_authorize_params() {
|
|
||||||
$filters = array(
|
|
||||||
"client_id" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => REGEX_CLIENT_ID), "flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"response_type" => array("filter" => FILTER_VALIDATE_REGEXP, "options" => array("regexp" => REGEX_AUTH_RESPONSE_TYPE), "flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"redirect_uri" => array("filter" => FILTER_VALIDATE_URL, "flags" => array(FILTER_FLAG_SCHEME_REQUIRED, FILTER_REQUIRE_SCALAR)),
|
|
||||||
"state" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
"scope" => array("flags" => FILTER_REQUIRE_SCALAR),
|
|
||||||
);
|
|
||||||
|
|
||||||
$input = filter_input_array(INPUT_GET, $filters);
|
|
||||||
|
|
||||||
// Make sure a valid client id was supplied
|
|
||||||
if (!$input["client_id"]) {
|
|
||||||
if ($input["redirect_uri"])
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_INVALID_CLIENT_ID, $input["state"]);
|
|
||||||
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_CLIENT_ID); // We don't have a good URI to use
|
|
||||||
}
|
|
||||||
|
|
||||||
// redirect_uri is not required if already established via other channels
|
|
||||||
// check an existing redirect URI against the one supplied
|
|
||||||
$redirect_uri = $this->get_redirect_uri($input["client_id"]);
|
|
||||||
|
|
||||||
// At least one of: existing redirect URI or input redirect URI must be specified
|
|
||||||
if (!$redirect_uri && !$input["redirect_uri"])
|
|
||||||
$this->error(ERROR_BAD_REQUEST, ERROR_INVALID_REQUEST);
|
|
||||||
|
|
||||||
// get_redirect_uri should return false if the given client ID is invalid
|
|
||||||
// this probably saves us from making a separate db call, and simplifies the method set
|
|
||||||
if ($redirect_uri === false)
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_INVALID_CLIENT_ID, $input["state"]);
|
|
||||||
|
|
||||||
// If there's an existing uri and one from input, verify that they match
|
|
||||||
if ($redirect_uri && $input["redirect_uri"]) {
|
|
||||||
// Ensure that the input uri starts with the stored uri
|
|
||||||
if (strcasecmp(substr($input["redirect_uri"], 0, strlen($redirect_uri)),$redirect_uri) !== 0)
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_REDIRECT_URI_MISMATCH, $input["state"]);
|
|
||||||
} elseif ($redirect_uri) { // They did not provide a uri from input, so use the stored one
|
|
||||||
$input["redirect_uri"] = $redirect_uri;
|
|
||||||
}
|
|
||||||
|
|
||||||
// type and client_id are required
|
|
||||||
if (!$input["response_type"])
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_INVALID_REQUEST, $input["state"], ERROR_INVALID_RESPONSE_TYPE);
|
|
||||||
|
|
||||||
// Check requested auth response type against the list of supported types
|
|
||||||
if (array_search($input["response_type"], $this->get_supported_auth_response_types()) === false)
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_UNSUPPORTED_RESPONSE_TYPE, $input["state"]);
|
|
||||||
|
|
||||||
// Validate that the requested scope is supported
|
|
||||||
if ($input["scope"] && !$this->check_scope($input["scope"], $this->get_supported_scopes()))
|
|
||||||
$this->callback_error($input["redirect_uri"], ERROR_INVALID_SCOPE, $input["state"]);
|
|
||||||
|
|
||||||
return $input;
|
|
||||||
}
|
|
||||||
|
|
||||||
// After the user has approved or denied the access request
|
|
||||||
// the authorization server should call this function to redirect
|
|
||||||
// the user appropriately
|
|
||||||
|
|
||||||
// The params all come from the results of get_authorize_params
|
|
||||||
// except for $is_authorized -- this is true or false depending on whether
|
|
||||||
// the user authorized the access
|
|
||||||
public function finish_client_authorization($is_authorized, $type, $client_id, $redirect_uri, $state, $scope = null) {
|
|
||||||
if ($state !== null)
|
|
||||||
$result["query"]["state"] = $state;
|
|
||||||
|
|
||||||
if ($is_authorized === false) {
|
|
||||||
$result["query"]["error"] = ERROR_USER_DENIED;
|
|
||||||
} else {
|
|
||||||
if ($type == AUTH_CODE_AUTH_RESPONSE_TYPE || $type == CODE_AND_TOKEN_AUTH_RESPONSE_TYPE)
|
|
||||||
$result["query"]["code"] = $this->create_auth_code($client_id, $redirect_uri, $scope);
|
|
||||||
|
|
||||||
if ($type == ACCESS_TOKEN_AUTH_RESPONSE_TYPE || $type == CODE_AND_TOKEN_AUTH_RESPONSE_TYPE)
|
|
||||||
$result["fragment"] = $this->create_access_token($client_id, $scope);
|
|
||||||
}
|
|
||||||
|
|
||||||
$this->do_redirect_uri_callback($redirect_uri, $result);
|
|
||||||
}
|
|
||||||
|
|
||||||
/* Other/utility functions */
|
|
||||||
|
|
||||||
private function do_redirect_uri_callback($redirect_uri, $result) {
|
|
||||||
header("HTTP/1.1 302 Found");
|
|
||||||
header("Location: " . $this->build_uri($redirect_uri, $result));
|
|
||||||
exit;
|
|
||||||
}
|
|
||||||
|
|
||||||
private function build_uri($uri, $data) {
|
|
||||||
$parse_url = parse_url($uri);
|
|
||||||
|
|
||||||
// Add our data to the parsed uri
|
|
||||||
foreach ($data as $k => $v) {
|
|
||||||
if (isset($parse_url[$k]))
|
|
||||||
$parse_url[$k] .= "&" . http_build_query($v);
|
|
||||||
else
|
|
||||||
$parse_url[$k] = http_build_query($v);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Put humpty dumpty back together
|
|
||||||
return
|
|
||||||
((isset($parse_url["scheme"])) ? $parse_url["scheme"] . "://" : "")
|
|
||||||
.((isset($parse_url["user"])) ? $parse_url["user"] . ((isset($parse_url["pass"])) ? ":" . $parse_url["pass"] : "") ."@" : "")
|
|
||||||
.((isset($parse_url["host"])) ? $parse_url["host"] : "")
|
|
||||||
.((isset($parse_url["port"])) ? ":" . $parse_url["port"] : "")
|
|
||||||
.((isset($parse_url["path"])) ? $parse_url["path"] : "")
|
|
||||||
.((isset($parse_url["query"])) ? "?" . $parse_url["query"] : "")
|
|
||||||
.((isset($parse_url["fragment"])) ? "#" . $parse_url["fragment"] : "");
|
|
||||||
}
|
|
||||||
|
|
||||||
// This belongs in a separate factory, but to keep it simple, I'm just keeping it here.
|
|
||||||
private function create_access_token($client_id, $scope) {
|
|
||||||
$token = array(
|
|
||||||
"access_token" => $this->gen_access_token(),
|
|
||||||
"expires_in" => $this->access_token_lifetime,
|
|
||||||
"scope" => $scope
|
|
||||||
);
|
|
||||||
|
|
||||||
$this->store_access_token($token["access_token"], $client_id, time() + $this->access_token_lifetime, $scope);
|
|
||||||
|
|
||||||
// Issue a refresh token also, if we support them
|
|
||||||
if (in_array(REFRESH_TOKEN_GRANT_TYPE, $this->get_supported_grant_types())) {
|
|
||||||
$token["refresh_token"] = $this->gen_access_token();
|
|
||||||
$this->store_refresh_token($token["refresh_token"], $client_id, time() + $this->refresh_token_lifetime, $scope);
|
|
||||||
}
|
|
||||||
|
|
||||||
return $token;
|
|
||||||
}
|
|
||||||
|
|
||||||
private function create_auth_code($client_id, $redirect_uri, $scope) {
|
|
||||||
$code = $this->gen_auth_code();
|
|
||||||
$this->store_auth_code($code, $client_id, $redirect_uri, time() + $this->auth_code_lifetime, $scope);
|
|
||||||
return $code;
|
|
||||||
}
|
|
||||||
|
|
||||||
// Implementing classes may want to override these two functions
|
|
||||||
// to implement other access token or auth code generation schemes
|
|
||||||
private function gen_access_token() {
|
|
||||||
return base64_encode(pack('N6', mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand()));
|
|
||||||
}
|
|
||||||
|
|
||||||
private function gen_auth_code() {
|
|
||||||
return base64_encode(pack('N6', mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand(), mt_rand()));
|
|
||||||
}
|
|
||||||
|
|
||||||
// Implementing classes may need to override this function for use on non-Apache web servers
|
|
||||||
// Just pull out the Authorization HTTP header and return it
|
|
||||||
// Return false if the Authorization header does not exist
|
|
||||||
private function get_authorization_header() {
|
|
||||||
if (array_key_exists("HTTP_AUTHORIZATION", $_SERVER))
|
|
||||||
return $_SERVER["HTTP_AUTHORIZATION"];
|
|
||||||
|
|
||||||
if (function_exists("apache_request_headers")) {
|
|
||||||
$headers = apache_request_headers();
|
|
||||||
|
|
||||||
if (array_key_exists("Authorization", $headers))
|
|
||||||
return $headers["Authorization"];
|
|
||||||
}
|
|
||||||
|
|
||||||
return false;
|
|
||||||
}
|
|
||||||
|
|
||||||
private function send_json_headers() {
|
|
||||||
header("Content-Type: application/json");
|
|
||||||
header("Cache-Control: no-store");
|
|
||||||
}
|
|
||||||
|
|
||||||
public function error($code, $message = null) {
|
|
||||||
header("HTTP/1.1 " . $code);
|
|
||||||
|
|
||||||
if ($message) {
|
|
||||||
$this->send_json_headers();
|
|
||||||
echo json_encode(array("error" => $message));
|
|
||||||
}
|
|
||||||
|
|
||||||
exit;
|
|
||||||
}
|
|
||||||
|
|
||||||
public function callback_error($redirect_uri, $error, $state, $message = null, $error_uri = null) {
|
|
||||||
$result["query"]["error"] = $error;
|
|
||||||
|
|
||||||
if ($state)
|
|
||||||
$result["query"]["state"] = $state;
|
|
||||||
|
|
||||||
if ($message)
|
|
||||||
$result["query"]["error_description"] = $message;
|
|
||||||
|
|
||||||
if ($error_uri)
|
|
||||||
$result["query"]["error_uri"] = $error_uri;
|
|
||||||
|
|
||||||
$this->do_redirect_uri_callback($redirect_uri, $result);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
Loading…
Reference in a new issue