diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/random_compat/random_bytes_libsodium_legacy.php
--- a/wp/wp-includes/random_compat/random_bytes_libsodium_legacy.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-includes/random_compat/random_bytes_libsodium_legacy.php	Mon Oct 14 18:28:13 2019 +0200
@@ -4,8 +4,8 @@
  * for using the new PHP 7 random_* API in PHP 5 projects
  * 
  * The MIT License (MIT)
- * 
- * Copyright (c) 2015 Paragon Initiative Enterprises
+ *
+ * Copyright (c) 2015 - 2017 Paragon Initiative Enterprises
  * 
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -26,63 +26,67 @@
  * SOFTWARE.
  */
 
-if ( ! is_callable( 'random_bytes' ) ):
-/**
- * If the libsodium PHP extension is loaded, we'll use it above any other
- * solution.
- *
- * libsodium-php project:
- * @ref https://github.com/jedisct1/libsodium-php
- *
- * @param int $bytes
- *
- * @throws Exception
- *
- * @return string
- */
-function random_bytes($bytes)
-{
-    try {
-        $bytes = RandomCompat_intval($bytes);
-    } catch (TypeError $ex) {
-        throw new TypeError(
-            'random_bytes(): $bytes must be an integer'
-        );
-    }
+if (!is_callable('random_bytes')) {
+    /**
+     * If the libsodium PHP extension is loaded, we'll use it above any other
+     * solution.
+     *
+     * libsodium-php project:
+     * @ref https://github.com/jedisct1/libsodium-php
+     *
+     * @param int $bytes
+     *
+     * @throws Exception
+     *
+     * @return string
+     */
+    function random_bytes($bytes)
+    {
+        try {
+            $bytes = RandomCompat_intval($bytes);
+        } catch (TypeError $ex) {
+            throw new TypeError(
+                'random_bytes(): $bytes must be an integer'
+            );
+        }
+
+        if ($bytes < 1) {
+            throw new Error(
+                'Length must be greater than 0'
+            );
+        }
 
-    if ($bytes < 1) {
-        throw new Error(
-            'Length must be greater than 0'
+        /**
+         * @var string
+         */
+        $buf = '';
+
+        /**
+         * \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
+         * generated in one invocation.
+         */
+        if ($bytes > 2147483647) {
+            for ($i = 0; $i < $bytes; $i += 1073741824) {
+                $n = ($bytes - $i) > 1073741824
+                    ? 1073741824
+                    : $bytes - $i;
+                $buf .= Sodium::randombytes_buf((int) $n);
+            }
+        } else {
+            $buf .= Sodium::randombytes_buf((int) $bytes);
+        }
+
+        if (is_string($buf)) {
+            if (RandomCompat_strlen($buf) === $bytes) {
+                return $buf;
+            }
+        }
+
+        /**
+         * If we reach here, PHP has failed us.
+         */
+        throw new Exception(
+            'Could not gather sufficient random data'
         );
     }
-
-    /**
-     * \Sodium\randombytes_buf() doesn't allow more than 2147483647 bytes to be
-     * generated in one invocation.
-     */
-    if ($bytes > 2147483647) {
-        $buf = '';
-        for ($i = 0; $i < $bytes; $i += 1073741824) {
-            $n = ($bytes - $i) > 1073741824
-                ? 1073741824
-                : $bytes - $i;
-            $buf .= Sodium::randombytes_buf($n);
-        }
-    } else {
-        $buf = Sodium::randombytes_buf($bytes);
-    }
-
-    if ($buf !== false) {
-        if (RandomCompat_strlen($buf) === $bytes) {
-            return $buf;
-        }
-    }
-
-    /**
-     * If we reach here, PHP has failed us.
-     */
-    throw new Exception(
-        'Could not gather sufficient random data'
-    );
 }
-endif;