Create paymentSecurity.js

src/payments/paymentSecurity.js

@@ -0,0 +1,92 @@
+// paymentSecurity.js
+
+import crypto from 'crypto';
+import validator from 'validator';
+
+class PaymentSecurity {
+    constructor(encryptionKey) {
+        this.encryptionKey = encryptionKey; // Key for encryption/decryption
+        this.algorithm = 'aes-256-cbc'; // Encryption algorithm
+    }
+
+    // Validate payment details
+    validatePaymentDetails(paymentDetails) {
+        const { cardNumber, expiryDate, cvv, amount } = paymentDetails;
+
+        if (!validator.isCreditCard(cardNumber)) {
+            throw new Error('Invalid credit card number.');
+        }
+        if (!validator.isDate(expiryDate)) {
+            throw new Error('Invalid expiry date.');
+        }
+        if (!validator.isNumeric(cvv) || cvv.length !== 3) {
+            throw new Error('Invalid CVV.');
+        }
+        if (!validator.isNumeric(amount) || amount <= 0) {
+            throw new Error('Invalid payment amount.');
+        }
+
+        console.log('Payment details validated successfully.');
+    }
+
+    // Encrypt sensitive payment data
+    encryptData(data) {
+        const iv = crypto.randomBytes(16); // Initialization vector
+        const cipher = crypto.createCipheriv(this.algorithm, Buffer.from(this.encryptionKey), iv);
+        let encrypted = cipher.update(data, 'utf8', 'hex');
+        encrypted += cipher.final('hex');
+        return iv.toString('hex') + ':' + encrypted; // Return IV and encrypted data
+    }
+
+    // Decrypt sensitive payment data
+    decryptData(encryptedData) {
+        const [ivHex, encryptedText] = encryptedData.split(':');
+        const iv = Buffer.from(ivHex, 'hex');
+        const decipher = crypto.createDecipheriv(this.algorithm, Buffer.from(this.encryptionKey), iv);
+        let decrypted = decipher.update(encryptedText, 'hex', 'utf8');
+        decrypted += decipher.final('utf8');
+        return decrypted;
+    }
+
+    // Process payment securely
+    async processPayment(paymentDetails) {
+        try {
+            // Validate payment details
+            this.validatePaymentDetails(paymentDetails);
+
+            // Encrypt sensitive data
+            const encryptedCardNumber = this.encryptData(paymentDetails.cardNumber);
+            const encryptedCVV = this.encryptData(paymentDetails.cvv);
+
+            // Simulate payment processing (e.g., sending to payment gateway)
+            console.log('Processing payment...');
+            // Here you would integrate with a payment gateway API
+
+            // For demonstration, we just log the encrypted data
+            console.log('Encrypted Card Number:', encryptedCardNumber);
+            console.log('Encrypted CVV:', encryptedCVV);
+            console.log('Payment processed successfully for amount:', paymentDetails.amount);
+        } catch (error) {
+            console.error('Error processing payment:', error.message);
+        }
+    }
+
+    // Example usage
+    exampleUsage() {
+        const paymentDetails = {
+            cardNumber: '4111111111111111', // Example card number (Visa)
+            expiryDate: '12/25', // Example expiry date
+            cvv: '123', // Example CVV
+            amount: 100.00 // Example amount
+        };
+
+        this.processPayment(paymentDetails);
+    }
+}
+
+// Example usage
+const encryptionKey = crypto.randomBytes(32).toString('hex'); // Generate a random encryption key
+const paymentSecurity = new PaymentSecurity(encryptionKey);
+paymentSecurity.exampleUsage();
+
+export default PaymentSecurity;