initial commit

enc.js

@@ -0,0 +1,59 @@
+import { pbkdf2Sync, randomBytes, createCipheriv, createDecipheriv } from 'crypto';
+
+const getIVandSalt = () => ({ iv: Buffer.from(process.env.iv, 'hex'), salt: Buffer.from(process.env.salt, 'hex') });
+
+// Function to generate a key from a password
+function generateKey(password, salt) {
+    return pbkdf2Sync(password, salt, 100000, 32, 'sha256');
+}
+
+// Function to encrypt a message
+export function encryptInitEnc(buffer, password) {
+    const salt = randomBytes(16); // Generate a new salt
+    const key = generateKey(password, salt);
+    const iv = randomBytes(16); // Initialization vector
+    const cipher = createCipheriv('aes-256-cbc', key, iv);
+    let encrypted = Buffer.concat([cipher.update(buffer), cipher.final()]);
+    return {
+        iv: iv.toString('hex'),
+        salt: salt.toString('hex'),
+        encryptedData: encrypted.toString('base64')
+    };
+}
+
+/**
+ * @param {Buffer} buffer 
+ * @param {string} password 
+ * @returns 
+ */
+export function encrypt(buffer, password) {
+    try {
+        const { iv, salt } = getIVandSalt();
+        const key = generateKey(password, salt);
+        const cipher = createCipheriv('aes-256-cbc', key, iv);
+
+        return Buffer.concat([cipher.update(buffer), cipher.final()]).toString('base64');
+    }
+    catch (err) {
+        console.error(err);
+        return null;
+    }
+}
+
+// Function to decrypt a message
+export function decrypt(encryptedData, password) {
+    try {
+        const { iv, salt } = getIVandSalt();
+        const key = generateKey(password, salt);
+        const decipher = createDecipheriv('aes-256-cbc', key, iv);
+        let decrypted = Buffer.concat([decipher.update(Buffer.from(encryptedData, 'base64')), decipher.final()]);
+        return decrypted;
+    }
+    catch (err) {
+        console.error(err);
+        return null;
+    }
+}
+
+// fs.writeFileSync('TODEC.gif', Buffer.from(encrypt(fs.readFileSync('TOENC.gif'), 'egg'), 'base64'));
+// fs.writeFileSync('DEC.gif', decrypt(fs.readFileSync('TOENC.gif').toString('base64'), 'egg'));