make kestrel a tak server, so that it can send and receive pois as cots data

server/api/cot/server-package.get.js

@@ -0,0 +1,60 @@
+import { existsSync } from 'node:fs'
+import JSZip from 'jszip'
+import { getCotSslPaths, getCotPort, TRUSTSTORE_PASSWORD, COT_TLS_REQUIRED_MESSAGE, buildP12FromCertPath } from '../../utils/cotSsl.js'
+import { requireAuth } from '../../utils/authHelpers.js'
+
+/**
+ * Build config.pref XML for iTAK: server connection + CA cert for trust (credentials entered in app).
+ * connectString format: host:port:ssl or host:port:tcp
+ */
+function buildConfigPref(hostname, port, ssl) {
+  const connectString = `${hostname}:${port}:${ssl ? 'ssl' : 'tcp'}`
+  return `<?xml version='1.0' encoding='UTF-8' standalone='yes' ?>
+<preference-set id="com.atakmap.app_preferences">
+  <entry key="connectionEntry">1</entry>
+  <entry key="description">KestrelOS</entry>
+  <entry key="enabled">true</entry>
+  <entry key="connectString">${escapeXml(connectString)}</entry>
+  <entry key="caCertPath">cert/caCert.p12</entry>
+  <entry key="caCertPassword">${escapeXml(TRUSTSTORE_PASSWORD)}</entry>
+  <entry key="cacheCredentials">true</entry>
+</preference-set>
+`
+}
+
+function escapeXml(s) {
+  return String(s)
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+}
+
+export default defineEventHandler(async (event) => {
+  requireAuth(event)
+  const config = useRuntimeConfig()
+  const paths = getCotSslPaths(config)
+  if (!paths || !existsSync(paths.certPath)) {
+    setResponseStatus(event, 404)
+    return { error: `CoT server is not using TLS. Server package ${COT_TLS_REQUIRED_MESSAGE} Use the QR code and add the server with SSL disabled (plain TCP) instead.` }
+  }
+
+  const hostname = getRequestURL(event).hostname
+  const port = getCotPort()
+
+  try {
+    const p12 = buildP12FromCertPath(paths.certPath, TRUSTSTORE_PASSWORD)
+    const zip = new JSZip()
+    zip.file('config.pref', buildConfigPref(hostname, port, true))
+    zip.folder('cert').file('caCert.p12', p12)
+
+    const blob = await zip.generateAsync({ type: 'nodebuffer' })
+    setHeader(event, 'Content-Type', 'application/zip')
+    setHeader(event, 'Content-Disposition', 'attachment; filename="kestrelos-itak-server-package.zip"')
+    return blob
+  }
+  catch (err) {
+    setResponseStatus(event, 500)
+    return { error: 'Failed to build server package.', detail: err?.message }
+  }
+})