From ca6b952c19702be3626f9774b9f2f0cd570d2ab6 Mon Sep 17 00:00:00 2001
From: Matthew Chen <matthew@signal.org>
Date: Tue, 10 Apr 2018 10:35:53 -0400
Subject: [PATCH] Never recycle biometric auth.

---
 Signal/src/util/OWSScreenLock.swift | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/Signal/src/util/OWSScreenLock.swift b/Signal/src/util/OWSScreenLock.swift
index 496f00958..04d9806c8 100644
--- a/Signal/src/util/OWSScreenLock.swift
+++ b/Signal/src/util/OWSScreenLock.swift
@@ -343,10 +343,8 @@ import LocalAuthentication
     private func screenLockContext() -> LAContext {
         let context = LAContext()
 
-        // If user has set any non-zero timeout, recycle biometric auth
-        // in the same period as our normal screen lock timeout, up to
-        // max of 10 seconds.
-        context.touchIDAuthenticationAllowableReuseDuration = TimeInterval(min(10.0, screenLockTimeout()))
+        // Never re-use recent biometric auth.
+        context.touchIDAuthenticationAllowableReuseDuration = TimeInterval(0)
 
         if #available(iOS 11.0, *) {
             assert(!context.interactionNotAllowed)