Portainer SSH Connection

backend/index.js

@@ -6,6 +6,9 @@ import http from 'http';
 import { spawn } from 'child_process';
 import { Server } from 'socket.io';
 import path from 'path';
+import fs from 'fs';
+import os from 'os';
+import crypto from 'crypto';
 import { fileURLToPath } from 'url';
 import { db } from './db/index.js';
 import {
@@ -82,6 +85,7 @@ const REDEPLOY_TYPES = {
 
 const SELF_STACK_ID = process.env.SELF_STACK_ID ? String(process.env.SELF_STACK_ID) : null;
 const PORTAINER_SCRIPT_SETTING_KEY = 'portainer_update_script';
+const PORTAINER_SSH_CONFIG_KEY = 'portainer_ssh_config';
 
 const DEFAULT_PORTAINER_UPDATE_SCRIPT = [
   'docker stop portainer',
@@ -166,6 +170,215 @@ const getEffectivePortainerScript = () => {
   };
 };
 
+
+const SSH_ENCRYPTION_KEY = crypto.createHash('sha256')
+  .update(process.env.PORTAINER_SSH_SECRET || process.env.PORTAINER_API_KEY || 'stackpulse-portainer-ssh-secret')
+  .digest();
+
+const encryptSensitive = (value) => {
+  if (!value) return null;
+  const iv = crypto.randomBytes(12);
+  const cipher = crypto.createCipheriv('aes-256-gcm', SSH_ENCRYPTION_KEY, iv);
+  const encrypted = Buffer.concat([cipher.update(value, 'utf8'), cipher.final()]);
+  const authTag = cipher.getAuthTag();
+  return {
+    iv: iv.toString('base64'),
+    content: encrypted.toString('base64'),
+    tag: authTag.toString('base64')
+  };
+};
+
+const decryptSensitive = (payload) => {
+  if (!payload || !payload.content) return '';
+  try {
+    const iv = Buffer.from(payload.iv, 'base64');
+    const content = Buffer.from(payload.content, 'base64');
+    const tag = Buffer.from(payload.tag, 'base64');
+    const decipher = crypto.createDecipheriv('aes-256-gcm', SSH_ENCRYPTION_KEY, iv);
+    decipher.setAuthTag(tag);
+    const decrypted = Buffer.concat([decipher.update(content), decipher.final()]);
+    return decrypted.toString('utf8');
+  } catch (err) {
+    console.warn('⚠️ [Maintenance] Konnte privaten SSH Schlüssel nicht entschlüsseln:', err.message);
+    return '';
+  }
+};
+
+const DEFAULT_PORTAINER_SSH_CONFIG = {
+  host: '',
+  port: 22,
+  username: '',
+  extraSshArgs: [],
+  privateKey: ''
+};
+
+const normalizeString = (value, fallback = '') => {
+  if (value === undefined || value === null) return fallback;
+  return String(value).trim();
+};
+
+const normalizePort = (value, fallback = DEFAULT_PORTAINER_SSH_CONFIG.port) => {
+  const parsed = Number.parseInt(value, 10);
+  return Number.isNaN(parsed) ? fallback : parsed;
+};
+
+const normalizeExtraArgs = (value, fallback = []) => {
+  if (Array.isArray(value)) {
+    return value.map((entry) => String(entry).trim()).filter(Boolean);
+  }
+  if (typeof value === 'string') {
+    return value
+      .split(/\r?\n/)
+      .map((entry) => entry.trim())
+      .filter(Boolean);
+  }
+  return Array.isArray(fallback) ? [...fallback] : [];
+};
+
+const normalizePrivateKey = (value, fallback = DEFAULT_PORTAINER_SSH_CONFIG.privateKey) => {
+  if (value === undefined) return fallback;
+  if (value === null) return '';
+  if (typeof value !== 'string') return String(value);
+  return value.replace(/\r\n/g, '\n').replace(/\r/g, '\n').trim();
+};
+
+const getPortainerSshConfig = () => {
+  const stored = getSetting(PORTAINER_SSH_CONFIG_KEY);
+  if (!stored) {
+    return { ...DEFAULT_PORTAINER_SSH_CONFIG };
+  }
+  try {
+    const parsed = stored.value ? JSON.parse(stored.value) : {};
+    const decryptedKey = parsed.privateKeyEncrypted ? decryptSensitive(parsed.privateKeyEncrypted) : '';
+    return {
+      host: normalizeString(parsed.host),
+      port: normalizePort(parsed.port),
+      username: normalizeString(parsed.username),
+      extraSshArgs: normalizeExtraArgs(parsed.extraSshArgs),
+      privateKey: decryptedKey
+    };
+  } catch (err) {
+    console.warn('⚠️ [Maintenance] Konnte Portainer SSH Konfiguration nicht parsen:', err.message);
+    return { ...DEFAULT_PORTAINER_SSH_CONFIG };
+  }
+};
+
+const persistPortainerSshConfig = (config) => {
+  const payload = {
+    host: config.host,
+    port: config.port,
+    username: config.username,
+    extraSshArgs: config.extraSshArgs,
+    privateKeyEncrypted: config.privateKey ? encryptSensitive(config.privateKey) : null
+  };
+  setSetting(PORTAINER_SSH_CONFIG_KEY, JSON.stringify(payload));
+};
+
+const mergeSshConfig = (base, overrides = {}) => ({
+  host: normalizeString(overrides.host, base.host),
+  port: normalizePort(overrides.port, base.port),
+  username: normalizeString(overrides.username, base.username),
+  extraSshArgs: normalizeExtraArgs(overrides.extraSshArgs, base.extraSshArgs),
+  privateKey: normalizePrivateKey(overrides.privateKey, base.privateKey)
+});
+
+const savePortainerSshConfig = (payload = {}) => {
+  const current = getPortainerSshConfig();
+  const next = mergeSshConfig(current, payload);
+  persistPortainerSshConfig(next);
+  return next;
+};
+
+const deletePortainerSshConfig = () => {
+  deleteSetting(PORTAINER_SSH_CONFIG_KEY);
+  return { ...DEFAULT_PORTAINER_SSH_CONFIG };
+};
+
+const createTempPrivateKeyFile = (privateKey) => {
+  const normalized = normalizePrivateKey(privateKey, '');
+  const content = normalized.endsWith('\n') ? normalized : `${normalized}\n`;
+  const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'stackpulse-ssh-'));
+  const filePath = path.join(tmpDir, 'id_rsa');
+  fs.writeFileSync(filePath, content, { mode: 0o600 });
+  return {
+    filePath,
+    cleanup: () => {
+      try {
+        fs.unlinkSync(filePath);
+      } catch (err) { }
+      try {
+        fs.rmdirSync(tmpDir);
+      } catch (err) { }
+    }
+  };
+};
+
+const buildSshCommandArgs = (config) => {
+  const sshConfig = mergeSshConfig(DEFAULT_PORTAINER_SSH_CONFIG, config);
+  if (!sshConfig.host) {
+    throw new Error('SSH Host ist nicht konfiguriert');
+  }
+  if (!sshConfig.username) {
+    throw new Error('SSH Benutzer ist nicht konfiguriert');
+  }
+
+  const args = [
+    '-p', String(sshConfig.port),
+    '-o', 'BatchMode=yes',
+    '-o', 'StrictHostKeyChecking=no'
+  ];
+
+  let cleanup = () => {};
+  if (sshConfig.privateKey) {
+    const { filePath, cleanup: dispose } = createTempPrivateKeyFile(sshConfig.privateKey);
+    cleanup = dispose;
+    args.push('-i', filePath);
+  }
+
+  if (sshConfig.extraSshArgs.length) {
+    args.push(...sshConfig.extraSshArgs);
+  }
+
+  args.push(`${sshConfig.username}@${sshConfig.host}`);
+  return { args, sshConfig, cleanup };
+};
+
+const ensureSshConfigReady = () => getPortainerSshConfig();
+
+const testSshConnection = async (configOverride = null) => {
+  const baseConfig = configOverride
+    ? mergeSshConfig(getPortainerSshConfig(), configOverride)
+    : ensureSshConfigReady();
+  const hasHost = Boolean(baseConfig.host && baseConfig.username);
+  if (!hasHost) {
+    throw new Error('SSH-Konfiguration ist unvollständig (Host/Benutzer erforderlich).');
+  }
+
+  const { args, cleanup } = buildSshCommandArgs(baseConfig);
+  const sshArgs = [...args, 'echo', '__PORTAINER_SSH_TEST__'];
+
+  try {
+    return await new Promise((resolve, reject) => {
+      const child = spawn('ssh', sshArgs, { env: process.env, stdio: ['ignore', 'pipe', 'pipe'] });
+      let output = '';
+      let errorOutput = '';
+      child.stdout.on('data', (chunk) => { output += chunk.toString(); });
+      child.stderr.on('data', (chunk) => { errorOutput += chunk.toString(); });
+      child.on('error', reject);
+      child.on('close', (code) => {
+        if (code === 0 && output.includes('__PORTAINER_SSH_TEST__')) {
+          resolve({ success: true, output: output.trim() });
+        } else {
+          const message = errorOutput.trim() || `SSH Test fehlgeschlagen (Exit-Code ${code})`;
+          reject(new Error(message));
+        }
+      });
+    });
+  } finally {
+    cleanup();
+  }
+};
+
 const detectPortainerContainer = async () => {
   try {
     const containersRes = await axiosInstance.get(`/api/endpoints/${ENDPOINT_ID}/docker/containers/json`, {
@@ -380,10 +593,39 @@ const executePortainerUpdateScript = async (script) => {
     return;
   }
 
-  return new Promise((resolve, reject) => {
+  const sshConfig = getPortainerSshConfig();
-    const child = spawn('bash', ['-lc', `set -e\n${normalized}`], {
+  const useSsh = Boolean(sshConfig.host && sshConfig.username);
+
+  if (!useSsh) {
+    addUpdateLog('Führe Update-Skript lokal auf dem StackPulse-Host aus.', 'info');
+    return new Promise((resolve, reject) => {
+      const child = spawn('bash', ['-lc', `set -e\n${normalized}`], {
+        env: process.env,
+        stdio: ['ignore', 'pipe', 'pipe']
+      });
+
+      child.stdout.on('data', (chunk) => logScriptOutput(chunk, 'stdout'));
+      child.stderr.on('data', (chunk) => logScriptOutput(chunk, 'stderr'));
+      child.on('error', (err) => reject(err));
+      child.on('close', (code) => {
+        if (code === 0) {
+          resolve();
+        } else {
+          reject(new Error(`Update-Skript beendet mit Exit-Code ${code}`));
+        }
+      });
+    });
+  }
+
+  const { args, cleanup } = buildSshCommandArgs(sshConfig);
+  const sshArgs = [...args, 'bash', '-s'];
+
+  addUpdateLog(`Verbinde zu ${sshConfig.username}@${sshConfig.host} für Update-Skript`, 'info');
+
+  const sshPromise = new Promise((resolve, reject) => {
+    const child = spawn('ssh', sshArgs, {
       env: process.env,
-      stdio: ['ignore', 'pipe', 'pipe']
+      stdio: ['pipe', 'pipe', 'pipe']
     });
 
     child.stdout.on('data', (chunk) => logScriptOutput(chunk, 'stdout'));
@@ -393,12 +635,20 @@ const executePortainerUpdateScript = async (script) => {
       if (code === 0) {
         resolve();
       } else {
-        reject(new Error(`Update-Skript beendet mit Exit-Code ${code}`));
+        reject(new Error(`SSH Befehl beendet mit Exit-Code ${code}`));
       }
     });
+
+    child.stdin.write(`set -e
+${normalized}
+`);
+    child.stdin.end();
   });
+
+  return sshPromise.finally(() => cleanup());
 };
 
+
 let currentPortainerUpdatePromise = null;
 
 const performPortainerUpdate = async ({ script, scriptSource, targetVersion }) => {
@@ -696,6 +946,7 @@ app.get('/api/maintenance/portainer-status', async (req, res) => {
 app.get('/api/maintenance/config', (req, res) => {
   const custom = getCustomPortainerScript();
   const effective = getEffectivePortainerScript();
+  const ssh = getPortainerSshConfig();
 
   res.json({
     maintenance: getMaintenanceState(),
@@ -707,10 +958,61 @@ app.get('/api/maintenance/config', (req, res) => {
       effective: effective.script,
       source: effective.source,
       updatedAt: effective.updatedAt
+    },
+    ssh: {
+      host: ssh.host,
+      port: ssh.port,
+      username: ssh.username,
+      extraSshArgs: ssh.extraSshArgs,
+      privateKeyStored: Boolean(ssh.privateKey)
     }
   });
 });
 
+app.put('/api/maintenance/ssh-config', (req, res) => {
+  try {
+    const config = savePortainerSshConfig(req.body || {});
+    res.json({
+      success: true,
+      ssh: {
+        host: config.host,
+        port: config.port,
+        username: config.username,
+        extraSshArgs: config.extraSshArgs,
+        privateKeyStored: Boolean(config.privateKey)
+      }
+    });
+  } catch (err) {
+    console.error('❌ [Maintenance] Fehler beim Speichern der SSH-Konfiguration:', err.message);
+    res.status(400).json({ error: err.message || 'Ungültige SSH-Konfiguration' });
+  }
+});
+
+app.delete('/api/maintenance/ssh-config', (req, res) => {
+  const config = deletePortainerSshConfig();
+  res.json({
+    success: true,
+    ssh: {
+      host: config.host,
+      port: config.port,
+      username: config.username,
+      extraSshArgs: config.extraSshArgs,
+      privateKeyStored: false
+    }
+  });
+});
+
+app.post('/api/maintenance/test-ssh', async (req, res) => {
+  try {
+    const override = req.body && Object.keys(req.body).length ? req.body : null;
+    const result = await testSshConnection(override);
+    res.json({ success: true, result });
+  } catch (err) {
+    console.error('❌ [Maintenance] SSH Test fehlgeschlagen:', err.message);
+    res.status(500).json({ error: err.message || 'SSH Test fehlgeschlagen' });
+  }
+});
+
 app.put('/api/maintenance/update-script', (req, res) => {
   if (portainerUpdateState.running) {
     return res.status(409).json({

frontend/src/Maintenance.jsx

@@ -90,17 +90,29 @@ const resolveStackType = (type) => {
   return type ?? "-";
 };
 
+const createEmptySshDraft = () => ({
+  host: '',
+  port: '22',
+  username: '',
+  privateKey: '',
+  extraSshArgs: ''
+});
+
 export default function Maintenance() {
   const { showToast } = useToast();
   const {
     maintenance: maintenanceMeta,
     update: updateState,
     script: scriptConfig,
+    ssh: sshConfig,
     loading: maintenanceLoading,
     error: maintenanceError,
     triggerUpdate,
     saveScript,
-    resetScript
+    resetScript,
+    saveSshConfig,
+    deleteSshConfig,
+    testSshConnection
   } = useMaintenance();
 
   const maintenanceActive = Boolean(maintenanceMeta?.active);
@@ -112,12 +124,40 @@ export default function Maintenance() {
   const [updateActionLoading, setUpdateActionLoading] = useState(false);
   const [updateActionError, setUpdateActionError] = useState("");
 
+  const [sshDraft, setSshDraft] = useState(() => createEmptySshDraft());
+  const [sshKeyStored, setSshKeyStored] = useState(false);
+  const [showPrivateKey, setShowPrivateKey] = useState(false);
+  const [sshSaving, setSshSaving] = useState(false);
+  const [sshTesting, setSshTesting] = useState(false);
+  const [sshDeleting, setSshDeleting] = useState(false);
+  const [sshTestResult, setSshTestResult] = useState(null);
+
   useEffect(() => {
     if (!scriptConfig) return;
     const nextValue = scriptConfig.custom ?? scriptConfig.default ?? scriptConfig.effective ?? "";
     setScriptDraft(nextValue);
   }, [scriptConfig]);
 
+  useEffect(() => {
+    if (!sshConfig) {
+      setSshDraft(createEmptySshDraft());
+      setSshKeyStored(false);
+      setShowPrivateKey(false);
+      setSshTestResult(null);
+      return;
+    }
+    setSshDraft({
+      host: sshConfig.host ?? '',
+      port: String(sshConfig.port ?? '22'),
+      username: sshConfig.username ?? '',
+      privateKey: '',
+      extraSshArgs: Array.isArray(sshConfig.extraSshArgs) ? sshConfig.extraSshArgs.join('\n') : ''
+    });
+    setSshKeyStored(Boolean(sshConfig.privateKeyStored));
+    setShowPrivateKey(false);
+    setSshTestResult(null);
+  }, [sshConfig]);
+
   const scriptBaseline = useMemo(() => {
     if (!scriptConfig) return "";
     if (scriptConfig.source === "custom" && typeof scriptConfig.custom === "string") {
@@ -222,6 +262,35 @@ export default function Maintenance() {
     return { groups, duplicateCount };
   }, [duplicates]);
 
+  const handleSshDraftChange = useCallback((field, value) => {
+    setSshDraft((prev) => ({ ...prev, [field]: value }));
+    if (field === 'privateKey') {
+      setSshKeyStored(false);
+    }
+  }, []);
+
+  const normalizedSshDraft = useMemo(() => {
+    const normalized = {
+      host: sshDraft.host.trim(),
+      port: Number.parseInt(sshDraft.port, 10) || 22,
+      username: sshDraft.username.trim(),
+      extraSshArgs: sshDraft.extraSshArgs
+        .split(/\r?\n/)
+        .map((entry) => entry.trim())
+        .filter(Boolean)
+    };
+
+    const rawKey = (sshDraft.privateKey ?? '');
+    const sanitizedKey = rawKey.replace(/\r\n/g, '\n').replace(/\r/g, '\n').trim();
+    if (sanitizedKey) {
+      normalized.privateKey = sanitizedKey;
+    } else if (!sshKeyStored) {
+      normalized.privateKey = '';
+    }
+
+    return normalized;
+  }, [sshDraft, sshKeyStored]);
+
   const handleScriptSave = useCallback(async () => {
     if (!scriptConfig) return;
     try {
@@ -257,6 +326,65 @@ export default function Maintenance() {
     }
   }, [resetScript, showToast]);
 
+  const handleSshSaveConfig = useCallback(async () => {
+    try {
+      setSshSaving(true);
+      await saveSshConfig(normalizedSshDraft);
+      setSshTestResult(null);
+      setShowPrivateKey(false);
+      showToast({
+        variant: "success",
+        title: "SSH-Konfiguration gespeichert",
+        description: "Verbindungseinstellungen wurden aktualisiert."
+      });
+    } catch (err) {
+      const message = err.response?.data?.error || err.message || "SSH-Konfiguration konnte nicht gespeichert werden";
+      showToast({ variant: "error", title: "Speichern fehlgeschlagen", description: message });
+    } finally {
+      setSshSaving(false);
+    }
+  }, [normalizedSshDraft, saveSshConfig, showToast]);
+
+  const handleSshTestConnection = useCallback(async () => {
+    try {
+      setSshTesting(true);
+      const result = await testSshConnection(normalizedSshDraft);
+      setSshTestResult({ success: true, timestamp: new Date(), details: result?.result });
+      showToast({
+        variant: "success",
+        title: "SSH-Verbindung erfolgreich",
+        description: "Verbindung zum Portainer-Host wurde hergestellt."
+      });
+    } catch (err) {
+      const message = err.response?.data?.error || err.message || "SSH-Verbindung fehlgeschlagen";
+      setSshTestResult({ success: false, timestamp: new Date(), error: message });
+      showToast({ variant: "error", title: "SSH-Test fehlgeschlagen", description: message });
+    } finally {
+      setSshTesting(false);
+    }
+  }, [normalizedSshDraft, testSshConnection, showToast]);
+
+  const handleSshDeleteConfig = useCallback(async () => {
+    try {
+      setSshDeleting(true);
+      await deleteSshConfig();
+      setSshDraft(createEmptySshDraft());
+      setSshKeyStored(false);
+      setShowPrivateKey(false);
+      setSshTestResult(null);
+      showToast({
+        variant: "info",
+        title: "SSH-Konfiguration gelöscht",
+        description: "Die Verbindungseinstellungen wurden zurückgesetzt."
+      });
+    } catch (err) {
+      const message = err.response?.data?.error || err.message || "SSH-Konfiguration konnte nicht gelöscht werden";
+      showToast({ variant: "error", title: "Löschen fehlgeschlagen", description: message });
+    } finally {
+      setSshDeleting(false);
+    }
+  }, [deleteSshConfig, showToast]);
+
   const handleTriggerUpdate = useCallback(async () => {
     if (maintenanceActive || updateRunning) {
       showToast({
@@ -575,7 +703,120 @@ export default function Maintenance() {
           </div>
         )}
 
-        <div className="mt-6 grid gap-6 lg:grid-cols-2">
+        <div className="mt-6 grid gap-6 lg:grid-cols-2 xl:grid-cols-3">
+          <div className="rounded-md border border-gray-700 bg-gray-900/40 p-4">
+            <div className="flex items-center justify-between">
+              <h3 className="text-sm font-semibold text-white">SSH-Verbindung</h3>
+            </div>
+            <div className="mt-3 grid gap-3 text-sm text-gray-200">
+              <label className="grid gap-1">
+                <span className="text-xs uppercase tracking-wide text-gray-400">Host</span>
+                <input
+                  type="text"
+                  value={sshDraft.host}
+                  onChange={(event) => handleSshDraftChange('host', event.target.value)}
+                  disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                  className="w-full rounded-md border border-gray-700 bg-gray-950/70 px-3 py-2 text-sm text-gray-100 focus:border-purple-500 focus:outline-none"
+                />
+              </label>
+              <div className="grid gap-3 sm:grid-cols-2">
+                <label className="grid gap-1">
+                  <span className="text-xs uppercase tracking-wide text-gray-400">Port</span>
+                  <input
+                    type="number"
+                    min="1"
+                    value={sshDraft.port}
+                    onChange={(event) => handleSshDraftChange('port', event.target.value)}
+                    disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                    className="w-full rounded-md border border-gray-700 bg-gray-950/70 px-3 py-2 text-sm text-gray-100 focus:border-purple-500 focus:outline-none"
+                  />
+                </label>
+                <label className="grid gap-1">
+                  <span className="text-xs uppercase tracking-wide text-gray-400">Benutzer</span>
+                  <input
+                    type="text"
+                    value={sshDraft.username}
+                    onChange={(event) => handleSshDraftChange('username', event.target.value)}
+                    disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                    className="w-full rounded-md border border-gray-700 bg-gray-950/70 px-3 py-2 text-sm text-gray-100 focus:border-purple-500 focus:outline-none"
+                  />
+                </label>
+              </div>
+              <div className="grid gap-1">
+                <div className="flex items-center justify-between text-xs uppercase tracking-wide text-gray-400">
+                  <label htmlFor="maintenance-ssh-private-key" className="cursor-pointer">Privater SSH-Key</label>
+                  <button
+                    type="button"
+                    onClick={() => setShowPrivateKey((prev) => !prev)}
+                    disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                    className="text-[11px] font-medium text-purple-300 transition hover:text-purple-200 disabled:opacity-50"
+                  >
+                    {showPrivateKey ? 'Verbergen' : 'Anzeigen'}
+                  </button>
+                </div>
+                <textarea
+                  id="maintenance-ssh-private-key"
+                  rows={6}
+                  value={sshDraft.privateKey}
+                  onChange={(event) => handleSshDraftChange('privateKey', event.target.value)}
+                  disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                  className="w-full rounded-md border border-gray-700 bg-gray-950/70 px-3 py-2 font-mono text-xs text-gray-100 focus:border-purple-500 focus:outline-none"
+                  placeholder="-----BEGIN OPENSSH PRIVATE KEY-----"
+                  autoComplete="off"
+                  spellCheck={false}
+                  style={showPrivateKey ? undefined : { WebkitTextSecurity: 'disc', MozTextSecurity: 'disc' }}
+                />
+                {sshKeyStored && !sshDraft.privateKey && (
+                  <span className="text-[11px] text-gray-400">
+                    Ein privater Schlüssel ist gespeichert. Neuer Inhalt ersetzt ihn oder lösche die Konfiguration unten.
+                  </span>
+                )}
+              </div>
+              <label className="grid gap-1">
+                <span className="text-xs uppercase tracking-wide text-gray-400">Weitere SSH-Argumente</span>
+                <textarea
+                  rows={3}
+                  value={sshDraft.extraSshArgs}
+                  onChange={(event) => handleSshDraftChange('extraSshArgs', event.target.value)}
+                  disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                  className="w-full rounded-md border border-gray-700 bg-gray-950/70 px-3 py-2 font-mono text-[11px] text-gray-100 focus:border-purple-500 focus:outline-none"
+                  placeholder="je Zeile ein Argument (optional)"
+                />
+              </label>
+            </div>
+            <div className="mt-4 flex flex-wrap gap-2">
+              <button
+                type="button"
+                onClick={handleSshSaveConfig}
+                disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                className="rounded-lg bg-purple-600 px-4 py-2 text-sm font-semibold text-white transition hover:bg-purple-500 disabled:opacity-50"
+              >
+                {sshSaving ? 'Speichern…' : 'SSH-Konfiguration speichern'}
+              </button>
+              <button
+                type="button"
+                onClick={handleSshTestConnection}
+                disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                className="rounded-lg border border-gray-600 px-4 py-2 text-sm font-medium text-gray-200 transition hover:bg-gray-700 disabled:opacity-50"
+              >
+                {sshTesting ? 'Test läuft…' : 'Verbindung testen'}
+              </button>
+              <button
+                type="button"
+                onClick={handleSshDeleteConfig}
+                disabled={sshSaving || sshTesting || sshDeleting || updateRunning}
+                className="rounded-lg border border-red-600 px-4 py-2 text-sm font-medium text-red-200 transition hover:bg-red-900/40 disabled:opacity-50"
+              >
+                {sshDeleting ? 'Löschen…' : 'SSH-Einstellungen löschen'}
+              </button>
+            </div>
+            {sshTestResult && (
+              <p className={`mt-3 text-xs ${sshTestResult.success ? 'text-green-300' : 'text-red-300'}`}>
+                {sshTestResult.success ? 'SSH-Verbindung erfolgreich.' : `SSH-Verbindung fehlgeschlagen: ${sshTestResult.error}`}
+              </p>
+            )}
+          </div>
+
           <div className="rounded-md border border-gray-700 bg-gray-900/40 p-4">
             <div className="flex items-center justify-between">
               <h3 className="text-sm font-semibold text-white">Update-Skript</h3>

frontend/src/context/MaintenanceContext.jsx

@@ -7,6 +7,7 @@ const INITIAL_STATE = {
   maintenance: null,
   update: null,
   script: null,
+  ssh: null,
   loading: true,
   error: "",
   lastUpdated: null
@@ -33,6 +34,7 @@ export default function MaintenanceProvider({ children }) {
         maintenance: data.maintenance ?? null,
         update: data.update ?? null,
         script: data.script ?? null,
+        ssh: data.ssh ?? null,
         loading: false,
         error: "",
         lastUpdated: new Date()
@@ -102,10 +104,26 @@ export default function MaintenanceProvider({ children }) {
     await fetchConfig();
   }, [fetchConfig]);
 
+  const saveSshConfig = useCallback(async (config) => {
+    await axios.put("/api/maintenance/ssh-config", config);
+    await fetchConfig();
+  }, [fetchConfig]);
+
+  const deleteSshConfig = useCallback(async () => {
+    await axios.delete("/api/maintenance/ssh-config");
+    await fetchConfig();
+  }, [fetchConfig]);
+
+  const testSshConnection = useCallback(async (config) => {
+    const response = await axios.post("/api/maintenance/test-ssh", config ?? {});
+    return response.data;
+  }, []);
+
   const value = useMemo(() => ({
     maintenance: state.maintenance,
     update: state.update,
     script: state.script,
+    ssh: state.ssh,
     loading: state.loading,
     error: state.error,
     lastUpdated: state.lastUpdated,
@@ -113,8 +131,11 @@ export default function MaintenanceProvider({ children }) {
     refreshUpdateStatus,
     triggerUpdate,
     saveScript,
-    resetScript
+    resetScript,
-  }), [state, fetchConfig, refreshUpdateStatus, triggerUpdate, saveScript, resetScript]);
+    saveSshConfig,
+    deleteSshConfig,
+    testSshConnection
+  }), [state, fetchConfig, refreshUpdateStatus, triggerUpdate, saveScript, resetScript, saveSshConfig, deleteSshConfig, testSshConnection]);
 
   return (
     <MaintenanceContext.Provider value={value}>