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wp-content/plugins/admin-site-enhancements/classes/class-obfuscate-author-slugs.php

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+<?php
+
+namespace ASENHA\Classes;
+
+/**
+ * Class for Obfuscate Author Slugs module
+ *
+ * @since 6.9.5
+ */
+class Obfuscate_Author_Slugs {
+
+    /**
+     * If an author name is queried, decrypt it. Used by pre_get_posts action.
+     * 
+     * @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
+     * @since 2.1.0
+     */
+    function alter_author_query( $query ) {
+
+        // Check if it's a query for author data, and that 'author_name' is not empty
+        if ( $query->is_author() && $query->query_vars['author_name'] != '' ) {
+
+            // Check for character(s) representing a hexadecimal digit
+            if ( ctype_xdigit( $query->query_vars['author_name'] ) ) {
+
+            // Get user by the decrypted user ID
+            $user = get_user_by( 'id', $this->decrypt( $query->query_vars['author_name'] ) );
+
+                if ( $user ) {
+
+                    $query->set( 'author_name', $user->user_nicename );
+
+                } else {
+
+                    // No user found
+                    $query->is_404 = true;
+                    $query->is_author = false;
+                    $query->is_archive = false;
+
+                }
+
+            } else {
+
+                // No hexadecimal digit detected in URL, i.e. someone is trying to access URL with original author slug
+                $query->is_404 = true;
+                $query->is_author = false;
+                $query->is_archive = false;
+
+            }
+
+        }
+        
+        return;
+    }
+
+    /**
+     * Replace author slug in author link to encrypted value. Used by author_link filter.
+     * 
+     * @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
+     * @since 2.1.0
+     */
+    function alter_author_link( $link, $user_id, $author_slug ) {
+
+        $encrypted_author_slug = $this->encrypt( $user_id );
+
+        return str_replace ( '/' . $author_slug, '/' . $encrypted_author_slug, $link );
+
+    }
+
+    /**
+     * Replace author slug in REST API /users/ endpoint to encrypted value. Used by rest_prepare_user filter.
+     *
+     * @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/tags/4.0.2/inc/class-smart-user-slug-hider.php
+     * @since 2.1.0
+     */
+    function alter_json_users($response, $user, $request) {
+
+        $data = $response->get_data();
+        $data['slug'] = $this->encrypt($data['id']);
+        $response->set_data($data);
+
+        return $response;
+
+    }
+
+    /**
+     * Helper function to return an encrypted user ID, which will then be used to replace the author slug.
+     * 
+     * @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/trunk/inc/class-smart-user-slug-hider.php
+     * @since 2.1.0
+     */
+    private function encrypt( $user_id ) {
+
+        // Returns encrypted encrypted author slug from user ID, e.g. encrypt user ID 3 to author slug 4e3062d8c8626a14
+        return bin2hex( openssl_encrypt( base_convert( $user_id, 10, 36 ), 'DES-EDE3', md5( ASENHA_URL ), OPENSSL_RAW_DATA ) );
+    }
+
+    
+    /**
+     * Helper function to decrypt an (encrypted) author slug and returns the user ID
+     * 
+     * @link https://plugins.trac.wordpress.org/browser/smart-user-slug-hider/trunk/inc/class-smart-user-slug-hider.php
+     * @since 2.1.0
+     */
+    private function decrypt( $encrypted_author_slug ) {
+
+        // Returns user ID, e.g. decrypts author slug 4e3062d8c8626a14 into user ID 3
+        return base_convert( openssl_decrypt( pack('H*', $encrypted_author_slug), 'DES-EDE3', md5( ASENHA_URL ), OPENSSL_RAW_DATA ), 36, 10 );
+
+    }
+
+}