From 428c360abfcc0a0b934527fd87a4b79825918975 Mon Sep 17 00:00:00 2001
From: Philipp Crocoll <philipp@crocoll.net>
Date: Mon, 5 Aug 2019 06:36:40 +0200
Subject: [PATCH] avoid potential NullReferenceException

---
 src/keepass2android/PasswordActivity.cs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/keepass2android/PasswordActivity.cs b/src/keepass2android/PasswordActivity.cs
index 8f0261d1..12777d88 100644
--- a/src/keepass2android/PasswordActivity.cs
+++ b/src/keepass2android/PasswordActivity.cs
@@ -1793,12 +1793,12 @@ namespace keepass2android
 	            if ((int) Build.VERSION.SdkInt >= 26)
 	            {
 	                Android.Content.ClipboardManager clipboardManager = (ClipboardManager)GetSystemService(Context.ClipboardService);
-	                if (clipboardManager.PrimaryClip.Description.Timestamp <
-	                    Java.Lang.JavaSystem.CurrentTimeMillis() - 5000)
+	                if (clipboardManager?.PrimaryClip?.Description == null || (clipboardManager.PrimaryClip.Description.Timestamp <
+	                    Java.Lang.JavaSystem.CurrentTimeMillis() - 5000))
 	                    return; //data older than 5 seconds
 	            }
 	            string clipboardContent = Util.GetClipboard(this);
-	            if (_otpInfo.OtpLength != clipboardContent.Length)
+	            if (clipboardContent == null || (_otpInfo.OtpLength != clipboardContent.Length))
 	            {
 	                return;
 	            }
@@ -1814,7 +1814,7 @@ namespace keepass2android
                 foreach (int otpId in _otpTextViewIds)
 	            {
 	                EditText otpEdit = FindViewById<EditText>(otpId);
-	                if (otpEdit.Visibility == ViewStates.Visible)
+	                if (otpEdit?.Visibility == ViewStates.Visible)
 	                {
 	                    if (string.IsNullOrEmpty(otpEdit.Text))
 	                    {