(PHP Extension) RSA Encrypt with Modulus and Exponent

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

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$rsa = new CkRsa();

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

$xml = new CkXml();
$xml->put_Tag('RSAPublicKey');
$xml->NewChild2('Modulus',$modulus);
$xml->NewChild2('Exponent',$exponent);

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

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

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

?>