RSA OAEP Padding

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding.

Download Chilkat RSA ActiveX

<?php

$rsa = new COM("Chilkat.Rsa");

$success = $rsa->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print 'RSA component unlock failed' . "\n";
    exit;
}

//  RSA public key in XML format:
$publicKey = '<RSAKeyValue><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>';

$rsa->ImportPublicKey($publicKey);

//  To use Optimal Asymmetric Encryption Padding (OAEP) padding,
//  simply set the OaepPadding property:
$rsa->OaepPadding = true;

//  Encrypt a string and return the encrypted data base64-encoded:
$rsa->EncodingMode = 'base64';

$plainText = 'RSA Encryption should be easy.';

$usePrivateKey = false;
$encryptedStr = $rsa->encryptStringENC($plainText,$usePrivateKey);
print $encryptedStr . "\n";
?>