feat: add content encryption

src/plugins/encrypt.ts

@@ -0,0 +1,28 @@
+import crypto from 'crypto';
+
+export function encrypt(content: string, password: string) {
+    // Generate a random initialization vector
+    const iv = crypto.randomBytes(16);
+
+    // Derive key from password using PBKDF2
+    const key = crypto.pbkdf2Sync(password, iv, 100000, 32, 'sha256');
+
+    // Create cipher
+    const cipher = crypto.createCipheriv('aes-256-gcm', key, iv);
+
+    // Encrypt content
+    let encryptedData = cipher.update(content, 'utf8', 'base64');
+    encryptedData += cipher.final('base64');
+
+    // Get auth tag and append to encrypted data
+    const authTag = cipher.getAuthTag();
+    const encryptedBuffer = Buffer.concat([
+        Buffer.from(encryptedData, 'base64'),
+        authTag
+    ]);
+
+    return {
+        encryptedData: encryptedBuffer.toString('base64'),
+        iv: iv.toString('base64')
+    };
+}