From 731cc3e92e73d40ffe2816825cea91618697284e Mon Sep 17 00:00:00 2001
From: Ryan Cramer <ryan@processwire.com>
Date: Fri, 1 Mar 2019 09:39:00 -0500
Subject: [PATCH] Fix issue processwire/processwire-issues#432

---
 .../InputfieldPassword/InputfieldPassword.module      | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/wire/modules/Inputfield/InputfieldPassword/InputfieldPassword.module b/wire/modules/Inputfield/InputfieldPassword/InputfieldPassword.module
index 43011082..18b70969 100644
--- a/wire/modules/Inputfield/InputfieldPassword/InputfieldPassword.module
+++ b/wire/modules/Inputfield/InputfieldPassword/InputfieldPassword.module
@@ -3,7 +3,7 @@
 /**
  * An Inputfield for handling a password
  * 
- * ProcessWire 3.x, Copyright 2016 by Ryan Cramer
+ * ProcessWire 3.x, Copyright 2019 by Ryan Cramer
  * https://processwire.com
  * 
  * @property array $requirements Array of requirements (See require* constants)
@@ -301,14 +301,16 @@ class InputfieldPassword extends InputfieldText {
 		$key = $this->attr('name'); 
 		$value = $this->attr('value');
 		if($value) {}
+		$confirmKey = "_" . $key;
 
 		if(!isset($input->$key)) return $this;
 		
 		// form was submitted
 		$pass = $input->$key;
+		$confirmPass = $input->$confirmKey;
 
-		if(strlen($pass)) { 
-			// password was submitted
+		if(strlen($pass) && strlen($confirmPass)) { 
+			// password was submitted (with confirmation)
 			$allowInput = true;
 			
 			if($this->requireOld > 0 && $user->isLoggedin()) {
@@ -325,8 +327,7 @@ class InputfieldPassword extends InputfieldText {
 			}
 
 			if($allowInput) {
-				$confirmKey = "_" . $key;
-				if($input->$confirmKey != $pass) {
+				if($confirmPass !== $pass) {
 					$this->error($this->_("Passwords do not match"));
 				}
 				$this->isValidPassword($pass);