added backup and email client

backend/src/utils/passwordGenerator.ts

@@ -0,0 +1,101 @@
+// ==================== PASSWORD GENERATOR ====================
+// Generiert sichere, zufällige Passwörter
+
+import { randomBytes } from 'crypto';
+
+// Zeichensätze für Passwort-Generierung
+const LOWERCASE = 'abcdefghijklmnopqrstuvwxyz';
+const UPPERCASE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+const NUMBERS = '0123456789';
+const SPECIAL = '!@#$%^&*()_+-=[]{}|;:,.<>?';
+
+// Standard-Passwortlänge
+const DEFAULT_LENGTH = 16;
+
+export interface PasswordOptions {
+  length?: number;
+  includeLowercase?: boolean;
+  includeUppercase?: boolean;
+  includeNumbers?: boolean;
+  includeSpecial?: boolean;
+}
+
+/**
+ * Generiert ein kryptografisch sicheres Passwort
+ */
+export function generateSecurePassword(options: PasswordOptions = {}): string {
+  const {
+    length = DEFAULT_LENGTH,
+    includeLowercase = true,
+    includeUppercase = true,
+    includeNumbers = true,
+    includeSpecial = true,
+  } = options;
+
+  // Zeichensatz zusammenstellen
+  let charset = '';
+  const requiredChars: string[] = [];
+
+  if (includeLowercase) {
+    charset += LOWERCASE;
+    requiredChars.push(getRandomChar(LOWERCASE));
+  }
+  if (includeUppercase) {
+    charset += UPPERCASE;
+    requiredChars.push(getRandomChar(UPPERCASE));
+  }
+  if (includeNumbers) {
+    charset += NUMBERS;
+    requiredChars.push(getRandomChar(NUMBERS));
+  }
+  if (includeSpecial) {
+    charset += SPECIAL;
+    requiredChars.push(getRandomChar(SPECIAL));
+  }
+
+  if (charset.length === 0) {
+    throw new Error('Mindestens ein Zeichensatz muss aktiviert sein');
+  }
+
+  // Restliche Zeichen auffüllen
+  const remainingLength = Math.max(0, length - requiredChars.length);
+  const randomChars: string[] = [];
+
+  for (let i = 0; i < remainingLength; i++) {
+    randomChars.push(getRandomChar(charset));
+  }
+
+  // Alle Zeichen mischen (Fisher-Yates Shuffle)
+  const allChars = [...requiredChars, ...randomChars];
+  for (let i = allChars.length - 1; i > 0; i--) {
+    const j = getRandomInt(i + 1);
+    [allChars[i], allChars[j]] = [allChars[j], allChars[i]];
+  }
+
+  return allChars.join('');
+}
+
+/**
+ * Generiert ein einfaches Passwort ohne Sonderzeichen (für APIs die das nicht mögen)
+ */
+export function generateSimplePassword(length = 12): string {
+  return generateSecurePassword({
+    length,
+    includeLowercase: true,
+    includeUppercase: true,
+    includeNumbers: true,
+    includeSpecial: false,
+  });
+}
+
+// Kryptografisch sichere Zufallszahl
+function getRandomInt(max: number): number {
+  const bytes = randomBytes(4);
+  const value = bytes.readUInt32BE(0);
+  return value % max;
+}
+
+// Zufälliges Zeichen aus einem Zeichensatz
+function getRandomChar(charset: string): string {
+  return charset[getRandomInt(charset.length)];
+}