Node.js

RSA Encrypt and Decrypt Credit Card Numbers

See more RSA Examples

_LANGUAGE_ 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.) Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var rsa = new chilkat.Rsa();

    var privKey = new chilkat.PrivateKey();

    // 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 chilkat.PublicKey();
    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 chilkat.Rsa();

    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

}

chilkatExample();