Experiment with PGP signed messages

source/net/filebot/License.java

@@ -44,7 +44,7 @@ public class License implements Serializable {
 		try {
 			// read and verify license file
 			if (!file.exists()) {
-				throw new FileNotFoundException("License not found");
+				throw new FileNotFoundException("UNREGISTERED");
 			}
 
 			byte[] bytes = Files.readAllBytes(file.toPath());
@@ -109,14 +109,16 @@ public class License implements Serializable {
 		}
 	}
 
-	public void check() throws Exception {
+	public License check() throws Exception {
 		if (error != null) {
 			throw error;
 		}
 
 		if (Instant.now().isAfter(expires)) {
-			throw new IllegalStateException("Expired: " + toString());
+			throw new IllegalStateException("EXPIRED: " + toString());
 		}
+
+		return this;
 	}
 
 	@Override
@@ -131,8 +133,7 @@ public class License implements Serializable {
 		// lock memoized resource while validating and setting a new license
 		synchronized (INSTANCE) {
 			// check if license file is valid and not expired
-			License license = new License(file);
+			License license = new License(file).check();
-			license.check();
 
 			// write to default license file path
 			Files.copy(file.toPath(), FILE.get().toPath(), StandardCopyOption.REPLACE_EXISTING);

source/net/filebot/LicenseModel.java

@@ -11,14 +11,16 @@ public enum LicenseModel {
 		private final Resource<Boolean> CHECK = Resource.lazy(() -> !getAppUserModelID().equals("PointPlanck.FileBot"));
 
 		@Override
-		public void check() throws LicenseError {
+		public Object check() throws LicenseError {
 			try {
 				if (CHECK.get()) {
-					throw new LicenseError("Microsoft Store: Desktop Bridge not found");
+					throw new LicenseError("Desktop Bridge not found");
 				}
 			} catch (Exception e) {
 				throw new IllegalStateException(e);
 			}
+
+			return "Microsoft Store License";
 		}
 	},
 
@@ -27,23 +29,25 @@ public enum LicenseModel {
 		private final Resource<Boolean> CHECK = Resource.lazy(() -> !File.listRoots()[0].canRead());
 
 		@Override
-		public void check() throws LicenseError {
+		public Object check() throws LicenseError {
 			try {
 				if (CHECK.get()) {
-					throw new LicenseError("Microsoft Store: Desktop Bridge not found");
+					throw new LicenseError("Mac App Sandbox not found");
 				}
 			} catch (Exception e) {
 				throw new IllegalStateException(e);
 			}
+
+			return "Mac App Store License";
 		}
 	},
 
 	PGPSignedMessage {
 
 		@Override
-		public void check() throws LicenseError {
+		public License check() throws LicenseError {
 			try {
-				License.INSTANCE.get().check();
+				return License.INSTANCE.get().check();
 			} catch (Exception e) {
 				throw new LicenseError(e.getMessage());
 			}
@@ -54,6 +58,6 @@ public enum LicenseModel {
 		return this == PGPSignedMessage;
 	}
 
-	public abstract void check() throws LicenseError;
+	public abstract Object check() throws LicenseError;
 
 }