feat: Multi-Source IOC Fetcher mit Fallback-Chain

- HedgeDoc: Immer aktuell (primär)
- Gist: Versioniert mit History-API (Fallback)
- Arch Security: Offiziell (Backup)
- AUR RPC: Suspicious Maintainer (Heuristik)

Cache-TTL: 5 Minuten für maximale Aktualität.

Resolves: Immer aktuelle IOC-Daten

src/ioc_fetcher.rs

@@ -63,6 +63,42 @@ impl std::fmt::Display for ConfidenceLevel {
     }
 }
 
+/// IOC Quellen — sortiert nach Aktualität und Zuverlässigkeit
+pub const IOC_SOURCES_LIVE: [(&str, &str, IocSourceType); 4] = [
+    // 1. HEDGEDOC — Immer aktuell (Live-Paste)
+    (
+        "hedgedoc_live",
+        "https://md.archlinux.org/s/SxbqukK6IA",
+        IocSourceType::HedgeDoc,
+    ),
+    // 2. GIST — Versioniert, aber evtl. verzögert
+    (
+        "atomic_arch_gist",
+        "https://gist.githubusercontent.com/Kidev/85756c3dcad3623ca5604a8135bafd14/raw",
+        IocSourceType::Gist,
+    ),
+    // 3. ARCH SECURITY TRACKER — Offiziell, aber langsam
+    (
+        "arch_security",
+        "https://security.archlinux.org/advisory/atomic-arch/json",
+        IocSourceType::JsonApi,
+    ),
+    // 4. AUR RPC — Dynamisch, API-basiert
+    (
+        "aur_rpc",
+        "https://aur.archlinux.org/rpc/v5/search?by=maintainer&arg=orphan",
+        IocSourceType::JsonApi,
+    ),
+];
+
+#[derive(Debug, Clone)]
+pub enum IocSourceType {
+    HedgeDoc,   // Live-Paste, immer aktuell
+    Gist,       // Versioniert, Git-History
+    JsonApi,    // REST API
+    TextList,   // Plaintext
+}
+
 pub struct IocFetcher {
     client: reqwest::Client,
     cache_dir: std::path::PathBuf,
@@ -82,41 +118,74 @@ impl IocFetcher {
         Ok(IocFetcher {
             client,
             cache_dir,
-            cache_ttl: Duration::from_secs(3600),
+            cache_ttl: Duration::from_secs(300), // 5 Minuten Cache für Live-Daten
         })
     }
 
+    /// Holt ALLE IOC-Quellen mit Fallback-Chain
     pub async fn fetch_all_iocs(&self) -> Result<Vec<IocEntry>> {
         let mut all_threats = Vec::new();
+        let mut sources_used = Vec::new();
 
-        match self.fetch_atomic_arch_list().await {
+        // 1. HEDGEDOC (Live, primär)
+        match self.fetch_hedgedoc().await {
             Ok(threats) => {
-                info!("{} IOCs von Atomic Arch Gist geladen", threats.len());
+                if !threats.is_empty() {
+                    info!("🟢 {} IOCs von HedgeDoc (LIVE)", threats.len());
                     all_threats.extend(threats);
+                    sources_used.push("hedgedoc_live");
+                } else {
+                    warn!("⚠️  HedgeDoc leer — Fallback zu Gist");
+                }
+            }
+            Err(e) => {
+                warn!("🔴 HedgeDoc fehlgeschlagen: {} — Fallback zu Gist", e);
             }
-            Err(e) => warn!("Konnte Atomic Arch Gist nicht laden: {}", e),
         }
 
+        // 2. GIST (Fallback, versioniert)
+        if sources_used.is_empty() {
+            match self.fetch_atomic_arch_gist().await {
+                Ok(threats) => {
+                    info!("🟡 {} IOCs von Gist (Fallback)", threats.len());
+                    all_threats.extend(threats);
+                    sources_used.push("atomic_arch_gist");
+                }
+                Err(e) => warn!("🔴 Gist fehlgeschlagen: {}", e),
+            }
+        }
+
+        // 3. ARCH SECURITY (Offiziell, langsam)
+        match self.fetch_arch_security().await {
+            Ok(threats) => {
+                info!("🟢 {} IOCs von Arch Security", threats.len());
+                all_threats.extend(threats);
+                sources_used.push("arch_security");
+            }
+            Err(e) => warn!("🔴 Arch Security fehlgeschlagen: {}", e),
+        }
+
+        // 4. AUR RPC (Suspicious Maintainer)
         match self.fetch_suspicious_from_aur().await {
             Ok(threats) => {
-                info!("{} suspicious Pakete von AUR RPC", threats.len());
+                if !threats.is_empty() {
+                    info!("🟡 {} suspicious Pakete von AUR RPC", threats.len());
                     all_threats.extend(threats);
+                    sources_used.push("aur_rpc");
                 }
-            Err(e) => warn!("Konnte AUR RPC nicht abfragen: {}", e),
+            }
+            Err(e) => debug!("AUR RPC fehlgeschlagen: {}", e),
         }
 
-        match self.fetch_community_blocklist().await {
+        info!("📊 Gesamt: {} IOCs aus Quellen: {:?}", all_threats.len(), sources_used);
-            Ok(threats) => {
-                info!("{} Einträge von Community Blocklist", threats.len());
-                all_threats.extend(threats);
-            }
-            Err(e) => warn!("Konnte Community Blocklist nicht laden: {}", e),
-        }
 
+        // Cache speichern
         self.save_cache(&all_threats).await?;
+
         Ok(all_threats)
     }
 
+    /// Prüft Cache auf Aktualität
     pub async fn get_cached_iocs(&self) -> Result<Vec<IocEntry>> {
         let cache_file = self.cache_dir.join("iocs.json");
 
@@ -132,37 +201,125 @@ impl IocFetcher {
                 let content = fs::read_to_string(&cache_file).await?;
                 let iocs: Vec<IocEntry> = serde_json::from_str(&content)
                     .context("Konnte Cache nicht parsen")?;
-                info!("{} IOCs aus Cache geladen", iocs.len());
+                debug!("{} IOCs aus Cache geladen (Alter: {}s)", iocs.len(), age.num_seconds());
                 return Ok(iocs);
             }
         }
 
+        // Cache veraltet oder nicht vorhanden — Live holen
         self.fetch_all_iocs().await
     }
 
-    async fn fetch_atomic_arch_list(&self) -> Result<Vec<IocEntry>> {
+    // === INDIVIDUELLE FETCHER ===
-        let url = "https://gist.githubusercontent.com/Kidev/85756c3dcad3623ca5604a8135bafd14/raw";
+
+    /// 1. HEDGEDOC — Immer aktuell
+    async fn fetch_hedgedoc(&self) -> Result<Vec<IocEntry>> {
+        let url = "https://md.archlinux.org/s/SxbqukK6IA";
 
         let response = self.client
             .get(url)
             .send()
             .await
-            .context("HTTP Request fehlgeschlagen")?;
+            .context("HedgeDoc Request fehlgeschlagen")?;
 
         if !response.status().is_success() {
-            anyhow::bail!("HTTP {} von {}", response.status(), url);
+            anyhow::bail!("HedgeDoc HTTP {}", response.status());
         }
 
         let text = response.text().await?;
         let mut threats = Vec::new();
 
+        // HedgeDoc Format: Markdown-Liste mit Paketnamen
+        // Format: `- paketname` oder `paketname` pro Zeile
         for line in text.lines() {
             let trimmed = line.trim();
-            if trimmed.is_empty() || trimmed.starts_with('#') {
+            
+            // Überspringe Markdown-Header, Leerzeilen, Kommentare
+            if trimmed.is_empty() 
+                || trimmed.starts_with('#')
+                || trimmed.starts_with("---")
+                || trimmed.starts_with("Arch Linux")
+                || trimmed.starts_with("Liste der")
+                || trimmed.starts_with("**")
+                || trimmed.starts_with("Quelle:")
+                || trimmed.starts_with("Aktualisiert:") {
                 continue;
             }
 
-            if trimmed.starts_with('[') || trimmed.starts_with('{') {
+            // Extrahiere Paketnamen (alles nach `- ` oder einfach die Zeile)
+            let pkg = if trimmed.starts_with("- ") {
+                trimmed[2..].trim()
+            } else if trimmed.starts_with("* ") {
+                trimmed[2..].trim()
+            } else {
+                trimmed
+            };
+
+            // Validiere: Paketnamen sind lowercase, alphanumerisch, -, _, .
+            if !pkg.is_empty() 
+                && pkg.chars().all(|c| c.is_ascii_lowercase() || c.is_ascii_digit() || c == '-' || c == '_' || c == '.')
+                && pkg.len() < 100 {
+                threats.push(IocEntry {
+                    package_name: pkg.to_string(),
+                    threat_type: ThreatType::MaliciousBuildScript,
+                    source: "hedgedoc_live".to_string(),
+                    discovered_date: chrono::Local::now().format("%Y-%m-%d").to_string(),
+                    description: "Atomic Arch Supply Chain Attack — Live HedgeDoc".to_string(),
+                    confidence: ConfidenceLevel::Critical,
+                });
+            }
+        }
+
+        Ok(threats)
+    }
+
+    /// 2. ATOMIC ARCH GIST — Versionierter Fallback
+    async fn fetch_atomic_arch_gist(&self) -> Result<Vec<IocEntry>> {
+        // Gist-History für "Latest" holen
+        let history_url = "https://api.github.com/gists/85756c3dcad3623ca5604a8135bafd14";
+        let latest_version = match self.client.get(history_url).send().await {
+            Ok(resp) => {
+                if resp.status().is_success() {
+                    let gist: serde_json::Value = resp.json().await?;
+                    gist["history"][0]["version"].as_str().map(|s| s.to_string())
+                } else {
+                    None
+                }
+            }
+            Err(_) => None,
+        };
+
+        // Raw URL mit Version für Cache-Busting
+        let raw_url = match latest_version {
+            Some(v) => format!(
+                "https://gist.githubusercontent.com/Kidev/85756c3dcad3623ca5604a8135bafd14/raw?version={}",
+                v
+            ),
+            None => "https://gist.githubusercontent.com/Kidev/85756c3dcad3623ca5604a8135bafd14/raw".to_string(),
+        };
+
+        let response = self.client
+            .get(&raw_url)
+            .send()
+            .await
+            .context("Gist Request fehlgeschlagen")?;
+
+        if !response.status().is_success() {
+            anyhow::bail!("Gist HTTP {}", response.status());
+        }
+
+        let text = response.text().await?;
+        let mut threats = Vec::new();
+
+        // Gist ist ein Script — wir parsen die Paketliste
+        for line in text.lines() {
+            let trimmed = line.trim();
+            if trimmed.is_empty() || trimmed.starts_with('#') || trimmed.starts_with("echo") {
+                continue;
+            }
+
+            // Extrahiere Paketnamen (ähnlich wie HedgeDoc)
+            if trimmed.starts_with("[") || trimmed.starts_with("{") {
                 if let Ok(json_list) = serde_json::from_str::<Vec<String>>(trimmed) {
                     for pkg in json_list {
                         threats.push(IocEntry {
@@ -170,18 +327,19 @@ impl IocFetcher {
                             threat_type: ThreatType::MaliciousBuildScript,
                             source: "atomic_arch_gist".to_string(),
                             discovered_date: chrono::Local::now().format("%Y-%m-%d").to_string(),
-                            description: "Atomic Arch Supply Chain Attack".to_string(),
+                            description: "Atomic Arch Supply Chain Attack — Gist Fallback".to_string(),
                             confidence: ConfidenceLevel::Critical,
                         });
                     }
                 }
-            } else {
+            } else if !trimmed.contains(" ") && !trimmed.contains("/") && trimmed.len() < 100 {
+                // Einzelne Paketnamen
                 threats.push(IocEntry {
                     package_name: trimmed.to_string(),
                     threat_type: ThreatType::MaliciousBuildScript,
                     source: "atomic_arch_gist".to_string(),
                     discovered_date: chrono::Local::now().format("%Y-%m-%d").to_string(),
-                    description: "Atomic Arch Supply Chain Attack".to_string(),
+                    description: "Atomic Arch Supply Chain Attack — Gist Fallback".to_string(),
                     confidence: ConfidenceLevel::Critical,
                 });
             }
@@ -190,48 +348,93 @@ impl IocFetcher {
         Ok(threats)
     }
 
-    async fn fetch_suspicious_from_aur(&self) -> Result<Vec<IocEntry>> {
+    /// 3. ARCH SECURITY TRACKER — Offiziell
-        Ok(Vec::new())
+    async fn fetch_arch_security(&self) -> Result<Vec<IocEntry>> {
-    }
+        let url = "https://security.archlinux.org/advisory/atomic-arch/json";
 
-    async fn fetch_community_blocklist(&self) -> Result<Vec<IocEntry>> {
+        let response = self.client
-        let url = "https://raw.githubusercontent.com/Kidev/AUR-Blocklist/main/blocklist.txt";
+            .get(url)
+            .send()
+            .await;
 
-        let response = match self.client.get(url).send().await {
+        match response {
-            Ok(r) => r,
+            Ok(resp) => {
-            Err(_) => {
+                if resp.status().is_success() {
-                debug!("Community Blocklist nicht erreichbar");
+                    let advisory: serde_json::Value = resp.json().await?;
-                return Ok(Vec::new());
-            }
-        };
-
-        if !response.status().is_success() {
-            return Ok(Vec::new());
-        }
-
-        let text = response.text().await?;
                     let mut threats = Vec::new();
 
-        for line in text.lines() {
+                    // Parsen der Advisory-JSON
-            let trimmed = line.trim();
+                    if let Some(packages) = advisory["packages"].as_array() {
-            if trimmed.is_empty() || trimmed.starts_with('#') {
+                        for pkg in packages {
-                continue;
+                            if let Some(name) = pkg.as_str() {
-            }
-
                                 threats.push(IocEntry {
-                package_name: trimmed.to_string(),
+                                    package_name: name.to_string(),
-                threat_type: ThreatType::Unknown("community_reported".to_string()),
+                                    threat_type: ThreatType::MaliciousBuildScript,
-                source: "community_blocklist".to_string(),
+                                    source: "arch_security".to_string(),
                                     discovered_date: chrono::Local::now().format("%Y-%m-%d").to_string(),
-                description: "Community-reported suspicious package".to_string(),
+                                    description: "Arch Linux Security Advisory — Atomic Arch".to_string(),
-                confidence: ConfidenceLevel::Medium,
+                                    confidence: ConfidenceLevel::Critical,
                                 });
                             }
+                        }
+                    }
 
                     Ok(threats)
+                } else {
+                    Ok(Vec::new())
+                }
+            }
+            Err(_) => Ok(Vec::new()),
+        }
     }
 
-    async fn save_cache(&self,
+    /// 4. AUR RPC — Suspicious Maintainer
+    async fn fetch_suspicious_from_aur(&self) -> Result<Vec<IocEntry>> {
+        // Suche nach orphaned Paketen die kürzlich übernommen wurden
+        // Dies ist eine Heuristik für mögliche Orphan-Takeover
+        let url = "https://aur.archlinux.org/rpc/v5/search?by=maintainer&arg=orphan";
+
+        let response = self.client.get(url).send().await;
+
+        match response {
+            Ok(resp) => {
+                if resp.status().is_success() {
+                    let rpc: serde_json::Value = resp.json().await?;
+                    let mut threats = Vec::new();
+
+                    if let Some(results) = rpc["results"].as_array() {
+                        for pkg in results.iter().take(50) {
+                            if let Some(name) = pkg["Name"].as_str() {
+                                // Hohe Heuristik-Scores
+                                let votes = pkg["NumVotes"].as_u64().unwrap_or(0);
+                                
+                                if votes < 10 {
+                                    threats.push(IocEntry {
+                                        package_name: name.to_string(),
+                                        threat_type: ThreatType::OrphanTakeover,
+                                        source: "aur_rpc".to_string(),
+                                        discovered_date: chrono::Local::now().format("%Y-%m-%d").to_string(),
+                                        description: "AUR Orphaned Package — niedrige Votes".to_string(),
+                                        confidence: ConfidenceLevel::Medium,
+                                    });
+                                }
+                            }
+                        }
+                    }
+
+                    Ok(threats)
+                } else {
+                    Ok(Vec::new())
+                }
+            }
+            Err(_) => Ok(Vec::new()),
+        }
+    }
+
+    // === CACHE ===
+
+    async fn save_cache(
+        &self,
         iocs: &[IocEntry]
     ) -> Result<()> {
         let cache_file = self.cache_dir.join("iocs.json");
@@ -240,7 +443,10 @@ impl IocFetcher {
         Ok(())
     }
 
-    pub fn check_package(&self,
+    // === PUBLIC HELPERS ===
+
+    pub fn check_package(
+        &self,
         package: &str,
         iocs: &[IocEntry]
     ) -> Vec<IocEntry> {
@@ -295,4 +501,23 @@ mod tests {
         assert_eq!(cached.len(), 1);
         assert_eq!(cached[0].package_name, "test-pkg");
     }
+
+    #[tokio::test]
+    async fn test_hedgedoc_fetch() {
+        let tmp = tempfile::tempdir().unwrap();
+        let fetcher = IocFetcher::new(tmp.path().to_path_buf()).await.unwrap();
+
+        // Live-Test (kann fehlschlagen wenn HedgeDoc down)
+        let threats = fetcher.fetch_hedgedoc().await;
+        
+        // Sollte entweder IOCs liefern oder fehlschlagen
+        match threats {
+            Ok(list) => {
+                println!("HedgeDoc lieferte {} IOCs", list.len());
+            }
+            Err(e) => {
+                println!("HedgeDoc fehlgeschlagen: {} (normal wenn offline)", e);
+            }
+        }
+    }
 }