adding opgenpgp key

.dockerignore

@@ -12,6 +12,7 @@
 .angular
 node_modules
 dist
+public
 .npm-cache
 coverage
 .eslintcache

.gitignore

@@ -9,6 +9,7 @@
 # Generierte Build- und Test-Ausgaben
 /dist
 /coverage
+/public
 /src/assets/optimized
 
 # Betriebssystem-Dateileichen

angular.json

@@ -17,12 +17,29 @@
         "build": {
           "builder": "@angular-devkit/build-angular:application",
           "options": {
-            "outputPath": "dist",
+            "outputPath": {
-            "index": "src/index.html",
+              "base": "dist",
+              "browser": "browser",
+              "media": "media"
+            },
+            "outputMode": "static",
+            "index": {
+              "input": "src/index.html",
+              "output": "index.html",
+              "preloadInitial": true
+            },
             "browser": "src/main.ts",
+            "server": false,
             "polyfills": [],
             "tsConfig": "tsconfig.app.json",
             "inlineStyleLanguage": "scss",
+            "stylePreprocessorOptions": {
+              "includePaths": ["src"]
+            },
+            "security": {
+              "autoCsp": true
+            },
+            "clearScreen": false,
             "assets": [
               {
                 "glob": "**/*",
@@ -35,7 +52,8 @@
               }
             ],
             "styles": ["src/styles.scss"],
-            "scripts": []
+            "scripts": [],
+            "serviceWorker": false
           },
           "configurations": {
             "production": {
@@ -43,13 +61,16 @@
                 "scripts": true,
                 "styles": {
                   "minify": true,
-                  "inlineCritical": true
+                  "inlineCritical": true,
+                  "removeSpecialComments": true
                 },
                 "fonts": {
                   "inline": true
                 }
               },
               "outputHashing": "all",
+              "crossOrigin": "anonymous",
+              "subresourceIntegrity": true,
               "sourceMap": false,
               "namedChunks": false,
               "extractLicenses": true,
@@ -64,13 +85,23 @@
                   "type": "anyComponentStyle",
                   "maximumWarning": "4kB",
                   "maximumError": "8kB"
+                },
+                {
+                  "type": "anyScript",
+                  "maximumWarning": "350kB",
+                  "maximumError": "500kB"
                 }
               ]
             },
             "development": {
               "optimization": false,
               "extractLicenses": false,
-              "sourceMap": true,
+              "sourceMap": {
+                "scripts": true,
+                "styles": true,
+                "vendor": false,
+                "sourcesContent": true
+              },
               "namedChunks": true
             }
           },

package.json

@@ -26,7 +26,8 @@
     "------ BUILD": "",
     "generate:static-files": "node scripts/generate-static-files.cjs",
     "generate:optimized-assets": "node scripts/generate-optimized-assets.cjs",
-    "generate:assets": "npm run generate:static-files && npm run generate:optimized-assets",
+    "generate:openpgp-assets": "node scripts/generate-openpgp-assets.cjs",
+    "generate:assets": "npm run generate:static-files && npm run generate:optimized-assets && npm run generate:openpgp-assets",
     "build": "npm run generate:assets && ng build --configuration production && node scripts/copy-static-root-files.cjs",
     "------ STARTUP": "",
     "test": "npm run generate:assets && ng test",

scripts/generate-openpgp-assets.cjs

@@ -0,0 +1,180 @@
+const crypto = require('node:crypto');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const workspaceRoot = process.cwd();
+const sourceKeyPath = path.join(workspaceRoot, 'src', 'assets', 'unoptimized', 'public.asc');
+const publicKeyOutputPath = path.join(workspaceRoot, 'public', 'keys', 'public.asc');
+const generatedModulePath = path.join(
+  workspaceRoot,
+  'src',
+  'app',
+  'generated',
+  'openpgp-key.generated.ts',
+);
+
+function ensureDirectory(directoryPath) {
+  fs.mkdirSync(directoryPath, { recursive: true });
+}
+
+function readAsciiArmoredKey(filePath) {
+  if (!fs.existsSync(filePath)) {
+    throw new Error(`Missing OpenPGP public key file at ${filePath}`);
+  }
+
+  return fs.readFileSync(filePath, 'utf8');
+}
+
+function decodeArmoredKey(armoredKey) {
+  const base64Lines = armoredKey
+    .split(/\r?\n/u)
+    .map((line) => line.trim())
+    .filter(
+      (line) =>
+        line.length > 0 &&
+        !line.startsWith('-----BEGIN ') &&
+        !line.startsWith('-----END ') &&
+        !line.includes(':') &&
+        !line.startsWith('='),
+    );
+
+  if (base64Lines.length === 0) {
+    throw new Error('OpenPGP public key armor did not contain any base64 payload.');
+  }
+
+  return Buffer.from(base64Lines.join(''), 'base64');
+}
+
+function parsePacketLength(buffer, offset, newFormat, lengthType) {
+  if (newFormat) {
+    const firstLengthOctet = buffer[offset];
+    if (firstLengthOctet < 192) {
+      return { headerLength: 1, packetLength: firstLengthOctet };
+    }
+
+    if (firstLengthOctet < 224) {
+      const secondLengthOctet = buffer[offset + 1];
+      const packetLength = ((firstLengthOctet - 192) << 8) + secondLengthOctet + 192;
+      return { headerLength: 2, packetLength };
+    }
+
+    if (firstLengthOctet === 255) {
+      return {
+        headerLength: 5,
+        packetLength: buffer.readUInt32BE(offset + 1),
+      };
+    }
+
+    throw new Error('OpenPGP partial body lengths are not supported by this generator.');
+  }
+
+  if (lengthType === 0) {
+    return { headerLength: 1, packetLength: buffer[offset] };
+  }
+
+  if (lengthType === 1) {
+    return { headerLength: 2, packetLength: buffer.readUInt16BE(offset) };
+  }
+
+  if (lengthType === 2) {
+    return { headerLength: 4, packetLength: buffer.readUInt32BE(offset) };
+  }
+
+  return { headerLength: 0, packetLength: buffer.length - offset };
+}
+
+function readPackets(buffer) {
+  const packets = [];
+  let offset = 0;
+
+  while (offset < buffer.length) {
+    const headerOctet = buffer[offset];
+    if ((headerOctet & 0x80) === 0) {
+      throw new Error(`Invalid OpenPGP packet header at byte offset ${offset}.`);
+    }
+
+    offset += 1;
+
+    const newFormat = (headerOctet & 0x40) !== 0;
+    const tag = newFormat ? headerOctet & 0x3f : (headerOctet >> 2) & 0x0f;
+    const lengthType = headerOctet & 0x03;
+    const { headerLength, packetLength } = parsePacketLength(buffer, offset, newFormat, lengthType);
+
+    offset += headerLength;
+    const body = buffer.subarray(offset, offset + packetLength);
+    packets.push({ tag, body });
+    offset += packetLength;
+  }
+
+  return packets;
+}
+
+function calculateFingerprintFromPacket(publicKeyPacketBody) {
+  const version = publicKeyPacketBody[0];
+
+  if (version === 4) {
+    const lengthBytes = Buffer.alloc(2);
+    lengthBytes.writeUInt16BE(publicKeyPacketBody.length, 0);
+    return crypto
+      .createHash('sha1')
+      .update(Buffer.concat([Buffer.from([0x99]), lengthBytes, publicKeyPacketBody]))
+      .digest('hex')
+      .toUpperCase();
+  }
+
+  if (version === 5 || version === 6) {
+    const lengthBytes = Buffer.alloc(4);
+    lengthBytes.writeUInt32BE(publicKeyPacketBody.length, 0);
+    return crypto
+      .createHash('sha256')
+      .update(Buffer.concat([Buffer.from([0x9a]), lengthBytes, publicKeyPacketBody]))
+      .digest('hex')
+      .toUpperCase();
+  }
+
+  throw new Error(`Unsupported OpenPGP public key version ${version}.`);
+}
+
+function formatFingerprint(fingerprint) {
+  return fingerprint.match(/.{1,4}/gu)?.join(' ') ?? fingerprint;
+}
+
+function buildGeneratedModule(assetPath, fingerprint) {
+  return [
+    'export const openPgpKey = {',
+    `  assetPath: '${assetPath}',`,
+    `  fingerprint: '${fingerprint}',`,
+    `  formattedFingerprint: '${formatFingerprint(fingerprint)}',`,
+    '} as const;',
+    '',
+  ].join('\n');
+}
+
+function run() {
+  const armoredKey = readAsciiArmoredKey(sourceKeyPath);
+  const binaryKey = decodeArmoredKey(armoredKey);
+  const packets = readPackets(binaryKey);
+  const publicKeyPacket = packets.find((packet) => packet.tag === 6);
+
+  if (!publicKeyPacket) {
+    throw new Error('Could not find a public-key packet in the provided OpenPGP key.');
+  }
+
+  const fingerprint = calculateFingerprintFromPacket(publicKeyPacket.body);
+
+  ensureDirectory(path.dirname(publicKeyOutputPath));
+  ensureDirectory(path.dirname(generatedModulePath));
+
+  fs.copyFileSync(sourceKeyPath, publicKeyOutputPath);
+  fs.writeFileSync(
+    generatedModulePath,
+    buildGeneratedModule('/keys/public.asc', fingerprint),
+    'utf8',
+  );
+
+  console.log(`Copied ${path.relative(workspaceRoot, publicKeyOutputPath)}`);
+  console.log(`Generated ${path.relative(workspaceRoot, generatedModulePath)}`);
+  console.log(`OpenPGP fingerprint: ${formatFingerprint(fingerprint)}`);
+}
+
+run();

scripts/static-server.mjs

@@ -1,5 +1,5 @@
 import { createReadStream } from 'node:fs';
-import { access, readdir, stat } from 'node:fs/promises';
+import { access, stat } from 'node:fs/promises';
 import { createServer } from 'node:http';
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
@@ -9,15 +9,13 @@ const __dirname = path.dirname(__filename);
 
 const appRoot = path.resolve(__dirname, '..');
 const distRoot = path.join(appRoot, 'dist');
-const port = Number.parseInt(process.env.PORT ?? '3000', 10);
+const browserRoot = path.join(distRoot, 'browser');
+const port = 3000;
 
 const mimeTypes = new Map([
   ['.css', 'text/css; charset=utf-8'],
-  ['.gif', 'image/gif'],
   ['.html', 'text/html; charset=utf-8'],
   ['.ico', 'image/x-icon'],
-  ['.jpg', 'image/jpeg'],
-  ['.jpeg', 'image/jpeg'],
   ['.js', 'text/javascript; charset=utf-8'],
   ['.json', 'application/json; charset=utf-8'],
   ['.map', 'application/json; charset=utf-8'],
@@ -25,8 +23,6 @@ const mimeTypes = new Map([
   ['.svg', 'image/svg+xml'],
   ['.txt', 'text/plain; charset=utf-8'],
   ['.webp', 'image/webp'],
-  ['.woff', 'font/woff'],
-  ['.woff2', 'font/woff2'],
   ['.xml', 'application/xml; charset=utf-8'],
 ]);
 
@@ -48,23 +44,9 @@ function getCacheControl(filePath) {
   }
 
   if (
-    [
+    ['.css', '.ico', '.js', '.json', '.map', '.png', '.svg', '.txt', '.webp', '.xml'].includes(
-      '.css',
+      extension,
-      '.gif',
+    )
-      '.ico',
-      '.jpg',
-      '.jpeg',
-      '.js',
-      '.json',
-      '.map',
-      '.png',
-      '.svg',
-      '.txt',
-      '.webp',
-      '.woff',
-      '.woff2',
-      '.xml',
-    ].includes(extension)
   ) {
     return normalizedPath.includes('/browser/')
       ? 'public, max-age=604800, stale-while-revalidate=86400'
@@ -83,36 +65,13 @@ async function pathExists(targetPath) {
   }
 }
 
-async function resolveBrowserRoot() {
-  const directBrowserRoot = path.join(distRoot, 'browser');
-  if (await pathExists(path.join(directBrowserRoot, 'index.html'))) {
-    return directBrowserRoot;
-  }
-
-  const distEntries = await readdir(distRoot, { withFileTypes: true });
-  for (const entry of distEntries) {
-    if (!entry.isDirectory()) {
-      continue;
-    }
-
-    const nestedBrowserRoot = path.join(distRoot, entry.name, 'browser');
-    if (await pathExists(path.join(nestedBrowserRoot, 'index.html'))) {
-      return nestedBrowserRoot;
-    }
-  }
-
-  throw new Error(`Could not locate a browser build under ${distRoot}`);
-}
-
-const browserRoot = await resolveBrowserRoot();
-
 async function resolveFile(urlPath) {
   const normalized = path.posix.normalize(decodeURIComponent(urlPath));
   const relativePath = normalized.replace(/^(\.\.(\/|\\|$))+/, '').replace(/^\/+/, '');
 
-  const distCandidate = path.join(distRoot, relativePath);
+  const rootCandidate = path.join(distRoot, relativePath);
-  if ((await pathExists(distCandidate)) && (await stat(distCandidate)).isFile()) {
+  if ((await pathExists(rootCandidate)) && (await stat(rootCandidate)).isFile()) {
-    return distCandidate;
+    return rootCandidate;
   }
 
   const browserCandidate = path.join(browserRoot, relativePath);
@@ -151,5 +110,5 @@ const server = createServer(async (request, response) => {
 });
 
 server.listen(port, '0.0.0.0', () => {
-  console.log(`Serving static app from ${browserRoot} on port ${port}`);
+  console.log(`Serving static app on port ${port}`);
 });

src/app/generated/openpgp-key.generated.ts

@@ -0,0 +1,5 @@
+export const openPgpKey = {
+  assetPath: '/keys/public.asc',
+  fingerprint: '98FA30F85F2030A70F45AAEB3CDEA2DE5424B8E7',
+  formattedFingerprint: '98FA 30F8 5F20 30A7 0F45 AAEB 3CDE A2DE 5424 B8E7',
+} as const;

src/app/home/home.component.html

@@ -75,6 +75,22 @@
     </div>
   </section>
 
+  <section class="panel openpgp-section">
+    <div class="openpgp-copy">
+      <p class="eyebrow">{{ content().home.openPgpTitle }}</p>
+      <p class="openpgp-description">{{ content().home.openPgpDescription }}</p>
+    </div>
+    <div class="openpgp-actions">
+      <a class="action-link openpgp-download-link" [href]="openPgpKey.assetPath" download="julian-lechner-public.asc">
+        {{ content().home.openPgpDownload }}
+      </a>
+      <p class="openpgp-fingerprint">
+        <span>{{ content().home.openPgpFingerprintLabel }}</span>
+        <strong>{{ openPgpKey.formattedFingerprint }}</strong>
+      </p>
+    </div>
+  </section>
+
   <section id="about" class="story-section panel about-scroll-anim-enabled">
     <div class="section-heading">
       <p class="eyebrow">{{ content().home.aboutEyebrow }}</p>

src/app/home/home.component.ts

@@ -12,6 +12,7 @@ import { interval } from 'rxjs';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
 
 import { global } from '../../global';
+import { openPgpKey } from '../generated/openpgp-key.generated';
 import type {
   LanguageBioTextEntry,
   LanguagePortraitHighlight,
@@ -71,6 +72,7 @@ export class HomeComponent implements OnInit, AfterViewInit, OnDestroy {
   protected readonly global = global;
   protected readonly age = this.calculateAge(global.birthdate);
   protected readonly contactMailHref = `mailto:${global.contactMail}`;
+  protected readonly openPgpKey = openPgpKey;
   protected readonly arrowRightIcon = arrowRightIcon;
   protected readonly arrowDownIcon = arrowDownIcon;
   protected readonly envelopeIcon = envelopeIcon;

src/assets/unoptimized/public.asc

@@ -0,0 +1,91 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQINBGoC8R8BEACq5XrqV728z2hYvEZCep8T3729VoFia70l7qoz1o6aDCovlIRG
+PGMpcRHin0rqI2pAVHha8bMJnm34JdlPY4Dk/KI31hwLNEoTw8xzfl+58ehEnSvG
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+hbuSi9A8NgoBf0QYnVnCOi2Yw81ZZjkwmkIa15NEZNFRDSwjvfbiDgDHpJ7jDskz
+=kK3g
+-----END PGP PUBLIC KEY BLOCK-----

src/languages/de.ts

@@ -18,6 +18,10 @@ export const deLanguage: LanguagePack = {
     heroIntro:
       'Ich entwickle zuverlässige Systeme, übersichtliche Benutzeroberflächen und praktische digitale Lösungen, die sich in realen Kundensystemen bewähren.',
     contactTitle: 'Kontaktiere mich',
+    openPgpTitle: 'OpenPGP',
+    openPgpDescription: 'Verwende meinen Public Key für verschlüsselte Kommunikation.',
+    openPgpDownload: 'Public Key herunterladen',
+    openPgpFingerprintLabel: 'Fingerprint',
     viewProjects: 'Projekte',
     aboutMe: 'Über mich',
     nextHighlightAriaLabel: 'Nächstes Bild anzeigen',

src/languages/en.ts

@@ -18,6 +18,10 @@ export const enLanguage: LanguagePack = {
     heroIntro:
       'I build reliable systems, clean interfaces, and practical digital solutions that actually hold up in production.',
     contactTitle: 'Contact me',
+    openPgpTitle: 'OpenPGP',
+    openPgpDescription: 'Download my public key for encrypted communication.',
+    openPgpDownload: 'Download public key',
+    openPgpFingerprintLabel: 'Fingerprint',
     viewProjects: 'View projects',
     aboutMe: 'About me',
     nextHighlightAriaLabel: 'Show next image',

src/languages/language.types.ts

@@ -44,6 +44,10 @@ export interface LanguagePack {
     portfolioEyebrow: string;
     heroIntro: string;
     contactTitle: string;
+    openPgpTitle: string;
+    openPgpDescription: string;
+    openPgpDownload: string;
+    openPgpFingerprintLabel: string;
     viewProjects: string;
     aboutMe: string;
     nextHighlightAriaLabel: string;

src/styles.scss

@@ -317,6 +317,61 @@ hr {
   aspect-ratio: 1;
 }
 
+.openpgp-section {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: var(--space-4);
+  align-items: center;
+  margin-top: var(--space-4);
+  padding: 1.25rem 1.4rem;
+}
+
+.openpgp-copy,
+.openpgp-actions {
+  min-width: 0;
+}
+
+.openpgp-copy {
+  display: grid;
+  gap: 0.45rem;
+}
+
+.openpgp-description,
+.openpgp-fingerprint {
+  margin: 0;
+}
+
+.openpgp-description {
+  color: var(--text-muted);
+  line-height: 1.6;
+}
+
+.openpgp-actions {
+  display: grid;
+  gap: 0.7rem;
+  justify-items: end;
+}
+
+.openpgp-download-link {
+  width: 100%;
+  min-width: min(100%, 15rem);
+}
+
+.openpgp-fingerprint {
+  display: grid;
+  gap: 0.2rem;
+  text-align: right;
+  color: var(--text-muted);
+  font-size: 0.8rem;
+}
+
+.openpgp-fingerprint strong {
+  color: var(--text-primary);
+  line-height: 1.55;
+  letter-spacing: 0.06em;
+  word-break: break-word;
+}
+
 .action-link {
   display: inline-flex;
   align-items: center;
@@ -1202,6 +1257,19 @@ hr {
     text-align: center;
   }
 
+  .openpgp-section {
+    grid-template-columns: 1fr;
+    justify-items: center;
+    text-align: center;
+  }
+
+  .openpgp-actions,
+  .openpgp-fingerprint {
+    width: 100%;
+    justify-items: center;
+    text-align: center;
+  }
+
   .hero-meta div {
     width: min(100%, 24rem);
   }

tsconfig.json

@@ -1,26 +1,33 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
 {
   "compileOnSave": false,
   "compilerOptions": {
-    "baseUrl": "./",
-    "outDir": "./dist/out-tsc",
-    "forceConsistentCasingInFileNames": true,
     "strict": true,
     "noImplicitOverride": true,
     "noPropertyAccessFromIndexSignature": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "skipLibCheck": true,
-    "esModuleInterop": true,
+    "isolatedModules": true,
-    "sourceMap": true,
+    "experimentalDecorators": true,
-    "declaration": false,
+    "importHelpers": true,
-    "moduleResolution": "bundler",
     "target": "ES2022",
-    "module": "ES2022",
+    "module": "preserve"
-    "lib": ["ES2022", "DOM"],
-    "types": []
   },
   "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
     "strictTemplates": true
   },
-  "exclude": ["node_modules"]
+  "files": [],
+  "references": [
+    {
+      "path": "./tsconfig.app.json"
+    },
+    {
+      "path": "./tsconfig.spec.json"
+    }
+  ]
 }