Properly handles pubkey with no expiration

build.gradle

@@ -11,7 +11,7 @@ plugins {
     id 'signing'
 }
 
-version = '0.1.1'
+version = '0.1.2'
 group = 'org.teacon'
 archivesBaseName = 'RemoteSync-FML'
 

src/main/java/org/teacon/sync/PGPKeyStore.java

@@ -228,8 +228,15 @@ private static URL resolveSrv(URL original) {
     }
 
     private static boolean hasExpired(PGPPublicKey pubKey) {
-        Instant creationTime = pubKey.getCreationTime().toInstant();
-        Instant expirationTime = creationTime.plus(pubKey.getValidSeconds(), ChronoUnit.SECONDS);
-        return Instant.now().isAfter(expirationTime);
+        long duration = pubKey.getValidSeconds();
+        if (duration > 0) {
+            // Only check expiration if getValidSeconds() returns a positive value
+            Instant creationTime = pubKey.getCreationTime().toInstant();
+            Instant expirationTime = creationTime.plus(duration, ChronoUnit.SECONDS);
+            return Instant.now().isAfter(expirationTime);
+        } else {
+            // If getValidSeconds() returns 0 or less it means no expiration.
+            return false;
+        }
     }
 }