Changeset 49109 for trunk/src/wp-includes/load.php

Timestamp:

10/08/2020 10:12:02 PM (5 years ago)

Author:

TimothyBlynJacobs

Message:

REST API: Introduce Application Passwords for API authentication.

In WordPress 4.4 the REST API was first introduced. A few releases later in WordPress 4.7, the Content API endpoints were added, paving the way for Gutenberg and countless in-site experiences. In the intervening years, numerous plugins have built on top of the REST API. Many developers shared a common frustration, the lack of external authentication to the REST API.

This commit introduces Application Passwords to allow users to connect to external applications to their WordPress website. Users can generate individual passwords for each application, allowing for easy revocation and activity monitoring. An authorization flow is introduced to make the connection flow simple for users and application developers.

Application Passwords uses Basic Authentication, and by default is only available over an SSL connection.

Props georgestephanis, kasparsd, timothyblynjacobs, afercia, akkspro, andraganescu, arippberger, aristath, austyfrosty, ayesh, batmoo, bradyvercher, brianhenryie, helen, ipstenu, jeffmatson, jeffpaul, joostdevalk, joshlevinson, kadamwhite, kjbenk, koke, michael-arestad, Otto42, pekz0r, salzano, spacedmonkey, valendesigns.
Fixes #42790.

File:

• trunk/src/wp-includes/load.php (modified) (1 diff)

trunk/src/wp-includes/load.php

@@ -87 +87 @@
         $PHP_SELF            = $_SERVER['PHP_SELF'];
     }
+
+    wp_populate_basic_auth_from_authorization_header();
+}
+
+/**
+ * Populates the Basic Auth server details from the Authorization header.
+ *
+ * Some servers running in CGI or FastCGI mode don't pass the Authorization
+ * header on to WordPress.  If it's been rewritten to the `HTTP_AUTHORIZATION` header,
+ * fill in the proper $_SERVER variables instead.
+ *
+ * @since 5.6.0
+ */
+function wp_populate_basic_auth_from_authorization_header() {
+    // If we don't have anything to pull from, return early.
+    if ( ! isset( $_SERVER['HTTP_AUTHORIZATION'] ) && ! isset( $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] ) ) {
+        return;
+    }
+
+    // If either PHP_AUTH key is already set, do nothing.
+    if ( isset( $_SERVER['PHP_AUTH_USER'] ) || isset( $_SERVER['PHP_AUTH_PW'] ) ) {
+        return;
+    }
+
+    // From our prior conditional, one of these must be set.
+    $header = isset( $_SERVER['HTTP_AUTHORIZATION'] ) ? $_SERVER['HTTP_AUTHORIZATION'] : $_SERVER['REDIRECT_HTTP_AUTHORIZATION'];
+
+    // Test to make sure the pattern matches expected.
+    if ( ! preg_match( '%^Basic [a-z\d/+]*={0,2}$%i', $header ) ) {
+        return;
+    }
+
+    // Removing `Basic ` the token would start six characters in.
+    $token    = substr( $header, 6 );
+    $userpass = base64_decode( $token );
+
+    list( $user, $pass ) = explode( ':', $userpass );
+
+    // Now shove them in the proper keys where we're expecting later on.
+    $_SERVER['PHP_AUTH_USER'] = $user;
+    $_SERVER['PHP_AUTH_PW']   = $pass;
 }