License grace period: keep running when the master is down or rejects the key (LicenseGraceHours, default 72 h), start with the last confirmed license, auto-retry; panel restart button (port/panel settings without program restart, login kept); tests

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 20:02:05 +02:00
parent d4e5897b7f
commit 14db3ef4f4
10 changed files with 325 additions and 24 deletions
@@ -0,0 +1,55 @@
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.Json;
+
+namespace MSCO.Server;
+
+/// <summary>
+/// Letzte erfolgreiche Lizenzprüfung beim Master (data/license.json). Ist der Master mal nicht erreichbar oder lehnt
+/// den Schlüssel kurz ab (z.B. nach einem Umzug ohne keys.json), läuft bzw. startet der Server damit weiter - bis
+/// LicenseGraceHours ohne Bestätigung vergangen sind. Gespeichert wird nur ein Hash des Schlüssels.
+/// </summary>
+public static class LicenseCache
+{
+    public sealed class Entry
+    {
+        public string KeyHash { get; set; }
+        public string Owner { get; set; }
+        public string Label { get; set; }
+        public DateTime LastConfirmedUtc { get; set; }
+    }
+
+    static string PathOf(string dataDir) => Path.Combine(dataDir, "license.json");
+
+    static string Hash(string key) =>
+        Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(key ?? ""))).ToLowerInvariant();
+
+    /// <summary>Gemerkte Bestätigung für genau diesen Schlüssel (null = keine).</summary>
+    public static Entry Load(string dataDir, string key)
+    {
+        try
+        {
+            string path = PathOf(dataDir);
+            if (!File.Exists(path)) return null;
+            var entry = JsonSerializer.Deserialize<Entry>(File.ReadAllText(path));
+            return entry != null && entry.KeyHash == Hash(key) ? entry : null;
+        }
+        catch { return null; }
+    }
+
+    public static void Save(string dataDir, string key, string owner, string label, DateTime confirmedUtc)
+    {
+        try
+        {
+            var entry = new Entry { KeyHash = Hash(key), Owner = owner, Label = label, LastConfirmedUtc = confirmedUtc };
+            string path = PathOf(dataDir), tmp = path + ".tmp";
+            File.WriteAllText(tmp, JsonSerializer.Serialize(entry, new JsonSerializerOptions { WriteIndented = true }));
+            File.Move(tmp, path, true);
+        }
+        catch (Exception e) { GameServer.Log("Could not remember the license check: " + e.Message); }
+    }
+
+    /// <summary>"3 h", "2 d 4 h" ...</summary>
+    public static string Span(TimeSpan t) =>
+        t.TotalHours < 1 ? $"{Math.Max(1, (int)t.TotalMinutes)} min" : t.TotalDays < 1 ? $"{(int)t.TotalHours} h" : $"{(int)t.TotalDays} d {t.Hours} h";
+}