Added additional password hashing functions

app/helpers.php

@@ -10,4 +10,23 @@ function login_attr_description(): string
 function login_attr_name(): string
 {
 	return key(config('ldap.login.attr'));
+}
+
+/**
+ * Used to generate a random salt for crypt-style passwords. Salt strings are used
+ * to make pre-built hash cracking dictionaries difficult to use as the hash algorithm uses
+ * not only the user's password but also a randomly generated string. The string is
+ * stored as the first N characters of the hash for reference of hashing algorithms later.
+ *
+ * @param int $length The length of the salt string to generate.
+ * @return string The generated salt string.
+ * @throws \Random\RandomException
+ */
+function random_salt(int $length): string
+{
+	$str = bin2hex(random_bytes(ceil($length/2)));
+	if ($length%2 === 1)
+		return substr($str,0,-1);
+
+	return $str;
 }