Encryption

const crypto = require('crypto');

function encryptCardData(cardData, publicKeyPem) {
  // Convert card data to JSON string
  const jsonString = JSON.stringify(cardData);
  
  // Encrypt using RSA-OAEP with SHA-256
  const encrypted = crypto.publicEncrypt(
    {
      key: publicKeyPem,
      padding: crypto.constants.RSA_PKCS1_OAEP_PADDING,
      oaepHash: 'sha256'
    },
    Buffer.from(jsonString)
  );
  
  // Return base64-encoded string
  return encrypted.toString('base64');
}

// Usage
const publicKey = `-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmK09HXqCBjYVSTtsKRGK
ITZp/kXXvtKTpRaDNHHePFd7Zq6cjY4OhDo2WZJRnNf8iZbD4z+sLs17Ke2miN+t
CK6RD7e0XT6JLt0Q74rjrbsPRVmEXu4Unw8iUfA86TivylBLDdCUCbfQF53PnDnS
aZwNEiHDfhtGeLt7Ptk219adRIPwVeQAvjqLKGNzm+0KPiaL7cYhZmoFiy41YJvV
4T8b5hN1s6kBZtwpbU602hHoGInmPRl+By6Zz6YsBBJjBYEQh1XlKESzK0RytRYN
wwUWALiEc+w5i8mNJoDGRU9ImvYE9Jsq9abEAUSpWOWhLFqxnMjHXV+6XMdNksLW
AwIDAQAB
-----END PUBLIC KEY-----`;

const cardData = {
  card_number: '4111111111111111',
  expiration_month: '12',
  expiration_year: '2030',
  cvv: '123',
  card_holder_name: 'John Doe'
};

const encryptedData = encryptCardData(cardData, publicKey);
console.log(encryptedData);
// Output: "tbjH0nx6WaEkzHOjgw2crsusmVBuL8s+PxWF..."

import json
import base64
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.backends import default_backend

def encrypt_card_data(card_data, public_key_pem):
    # Load the public key
    public_key = serialization.load_pem_public_key(
        public_key_pem.encode(),
        backend=default_backend()
    )
    
    # Convert card data to JSON string
    json_string = json.dumps(card_data)
    
    # Encrypt using RSA-OAEP with SHA-256
    encrypted = public_key.encrypt(
        json_string.encode(),
        padding.OAEP(
            mgf=padding.MGF1(algorithm=hashes.SHA256()),
            algorithm=hashes.SHA256(),
            label=None
        )
    )
    
    # Return base64-encoded string
    return base64.b64encode(encrypted).decode()

# Usage
public_key = """-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmK09HXqCBjYVSTtsKRGK
ITZp/kXXvtKTpRaDNHHePFd7Zq6cjY4OhDo2WZJRnNf8iZbD4z+sLs17Ke2miN+t
CK6RD7e0XT6JLt0Q74rjrbsPRVmEXu4Unw8iUfA86TivylBLDdCUCbfQF53PnDnS
aZwNEiHDfhtGeLt7Ptk219adRIPwVeQAvjqLKGNzm+0KPiaL7cYhZmoFiy41YJvV
4T8b5hN1s6kBZtwpbU602hHoGInmPRl+By6Zz6YsBBJjBYEQh1XlKESzK0RytRYN
wwUWALiEc+w5i8mNJoDGRU9ImvYE9Jsq9abEAUSpWOWhLFqxnMjHXV+6XMdNksLW
AwIDAQAB
-----END PUBLIC KEY-----"""

card_data = {
    'card_number': '4111111111111111',
    'expiration_month': '12',
    'expiration_year': '2030',
    'cvv': '123',
    'card_holder_name': 'John Doe'
}

encrypted_data = encrypt_card_data(card_data, public_key)
print(encrypted_data)
# Output: "tbjH0nx6WaEkzHOjgw2crsusmVBuL8s+PxWF..."