Add wrapper around openssl_random_pseudo_bytes()

MD_STD.php

@@ -301,4 +301,19 @@ class MD_STD {
 
     }
 
+    /**
+     * Type-safe wrapper around openssl_random_pseudo_bytes.
+     *
+     * @param integer $length Length.
+     *
+     * @return string
+     */
+    public static function openssl_random_pseudo_bytes(int $length):string {
+
+        $output = \openssl_random_pseudo_bytes($length);
+        if ($output === false) throw new Exception("Failed generating random pseudo bytes using openssl_random_pseudo_bytes");
+        return $output;
+
+    }
+
 }