From 56ddd5e70f78f3f2199c02ec6d9c2e63facc1c22 Mon Sep 17 00:00:00 2001
From: Paul Schaub <vanitasvitae@fsfe.org>
Date: Fri, 11 Jun 2021 14:38:56 +0200
Subject: [PATCH] Prevent NPE in SOP when reading certificates

---
 .../src/main/java/org/pgpainless/sop/SopKeyUtil.java           | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pgpainless-sop/src/main/java/org/pgpainless/sop/SopKeyUtil.java b/pgpainless-sop/src/main/java/org/pgpainless/sop/SopKeyUtil.java
index 8fe5337a..f0082c10 100644
--- a/pgpainless-sop/src/main/java/org/pgpainless/sop/SopKeyUtil.java
+++ b/pgpainless-sop/src/main/java/org/pgpainless/sop/SopKeyUtil.java
@@ -51,6 +51,9 @@ public class SopKeyUtil {
                 PGPPublicKeyRingCollection collection = PGPainless.readKeyRing()
                         .keyRingCollection(in, true)
                         .getPgpPublicKeyRingCollection();
+                if (collection == null) {
+                    throw new PGPException("Provided file " + file.getName() + " does not contain a certificate.");
+                }
                 for (PGPPublicKeyRing keyRing : collection) {
                     publicKeyRings.add(keyRing);
                 }