Node.js

Duplicate PHP RSA Encryption

See more RSA Examples

Demonstrates how to duplicate the following PHP function. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    // Duplicate the following PHP code:
    // 
    //    public function encryptRSA($plainText,$rsaMOD,$pubKEY){
    //         $rsa  = new RSA();
    //         $rsa->setEncryptionMode(RSA::ENCRYPTION_PKCS1);
    //         $publicKey = [
    //             'e' => new BigInteger($pubKEY,16),
    //             'n' => new BigInteger($rsaMOD,16)
    //         ];
    // 		
    //         $rsa->loadKey($publicKey);
    //         $ciphertext = $rsa->encrypt($plainText);
    //         return bin2hex($ciphertext);
    //     }
    // 
    //     $plainText="key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678"
    //     $rsaMOD="F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673"
    //     $pubKEY="010001"

    // We have the RSA modulus in hex
    var rsaMOD = "F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673";

    // The RSA exponent in hex is "010001", which is 65537 in decimal.  It's typically the exponent that is always used.
    var rsaEXP = "010001";

    // Get the RSA modulus and exponent in base64.
    var bdMod = new chilkat.BinData();
    var bdExp = new chilkat.BinData();
    success = bdMod.AppendEncoded(rsaMOD,"hex");
    success = bdExp.AppendEncoded(rsaEXP,"hex");

    // Build the XML representation of the RSA public key
    var xml = new chilkat.Xml();
    xml.Tag = "RSAPublicKey";
    xml.UpdateChildContent("Modulus",bdMod.GetEncoded("base64"));
    xml.UpdateChildContent("Exponent",bdExp.GetEncoded("base64"));

    // Load the RSA public key into a Chilkat public key object.
    var pubkey = new chilkat.PublicKey();
    success = pubkey.LoadFromString(xml.GetXml());

    // Setup the RSA object for encryption and do it..
    var rsa = new chilkat.Rsa();
    rsa.VerboseLogging = true;
    success = rsa.UsePublicKey(pubkey);

    // Use PKCSv1.5 padding
    rsa.PkcsPadding = true;

    // Encrypt and return the string as hex.
    rsa.EncodingMode = "hex";
    var plainText = "key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678";
    var cipherText = rsa.EncryptStringENC(plainText,false);
    if (rsa.LastMethodSuccess == false) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Note: The PKCSv1_5 padding incorporates random bytes.  Therefore, the RSA encryption will produce different results each time -- all of which are valid 
    // and decrypt correctly to the same original text.
    console.log(cipherText);

}

chilkatExample();