(JavaScript) RSA Encrypt and Decrypt Credit Card Numbers
JavaScript sample code to RSA public-key encrypt and decrypt credit card numbers. The RSA key is loaded from an unencrypted PKCS8 file. Chilkat provides many ways of setting the key -- loading from both encrypted and unencrypted PEM, PKCS8, DER, PVK, etc. Keys may be loaded from files or in-memory representations. (The RSA component also provides the ability to generate RSA keys.) Note: This example requires Chilkat v11.0.0 or greater.
var success = false;
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
var rsa = new CkRsa();
var privKey = new CkPrivateKey();
// Load an RSA private key from a file:
success = privKey.LoadAnyFormatFile("rsaPrivateKey.key","");
if (success == false) {
console.log(privKey.LastErrorText);
return;
}
// Get the public part of the private key.
var pubKey = new CkPublicKey();
privKey.ToPublicKey(pubKey);
success = rsa.UsePublicKey(pubKey);
if (success == false) {
console.log(rsa.LastErrorText);
return;
}
// Encrypt a VISA credit card number:
// 1234-5678-0000-9999
var ccNumber = "1234567800009999";
var usePrivateKey = false;
rsa.EncodingMode = "base64";
var encryptedStr = rsa.EncryptStringENC(ccNumber,usePrivateKey);
console.log("Encrypted:");
console.log(encryptedStr);
// Now decrypt:
var rsaDecryptor = new CkRsa();
rsaDecryptor.EncodingMode = "base64";
rsaDecryptor.UsePrivateKey(privKey);
usePrivateKey = true;
var decryptedStr = rsaDecryptor.DecryptStringENC(encryptedStr,usePrivateKey);
console.log("Decrypted:");
console.log(decryptedStr);
// Important: RSA encryption should only be used to encrypt small amounts of data.
// It is typically used for encrypting symmetric encryption
// keys such that a symmetric encryption algorithm, such as
// AES is then used to encrypt/decrypt bulk data
|
