(PHP ActiveX) RSA Encrypt with Modulus and Exponent

Demonstrates how to RSA encrypt with a given modulus and exponent.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa')
$rsa = new COM("Chilkat.Rsa");

// Assuming you already have a base64 modulus and exponent,
// wrap it in XML like this:
$modulus = 'qMBRpdYrAy5aMmo31NErUizh5sbweguSmh4wlK6uJEIDl+kwTlROnE34KOFExeTbJSX0WygPi+vWl0yNq7buIMUKpytossAAWut5khO3CQJxTk7G2gnEPNUUXHiExGgNrLzcSLv8YIlfVALhoRWyC67KOL+a+3taNq3h+BHeWhM=';
$exponent = 'AQAB';

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml = new COM("Chilkat.Xml");
$xml->Tag = 'RSAPublicKey';
$xml->NewChild2('Modulus',$modulus);
$xml->NewChild2('Exponent',$exponent);

// Encrypt with the public key.
$publicKey = $xml->getXml();
$success = $rsa->ImportPublicKey($publicKey);

$usePrivateKey = 0;
$plainText = 'message in a bottle';

$rsa->EncodingMode = 'base64';
$encryptedStrBase64 = $rsa->encryptStringENC($plainText,$usePrivateKey);
print $encryptedStrBase64 . "\n";

?>