(PHP Extension) Duplicate PHP RSA Encryption

Demonstrates how to duplicate the following PHP function.

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 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
$rsaMOD = 'F0946D8F05604809E24B8CFFD30349CEA9E5F4D320BFD9E9AA1B088863F02C43E7997D37A3E27B4F8F359F1744DB6B20A437067C0D325A80660D12FF56A57673';

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

// Get the RSA modulus and exponent in base64.
$bdMod = new CkBinData();
$bdExp = new CkBinData();
$success = $bdMod->AppendEncoded($rsaMOD,'hex');
$success = $bdExp->AppendEncoded($rsaEXP,'hex');

// Build the XML representation of the RSA public key
$xml = new CkXml();
$xml->put_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.
$pubkey = new CkPublicKey();
$success = $pubkey->LoadFromString($xml->getXml());

// Setup the RSA object for encryption and do it..
$rsa = new CkRsa();
$rsa->put_VerboseLogging(true);
$success = $rsa->ImportPublicKeyObj($pubkey);

// Use PKCSv1.5 padding
$rsa->put_OaepPadding(false);

// Encrypt and return the string as hex.
$rsa->put_EncodingMode('hex');
$plainText = 'key=abcdefghijkmnopq&iv=abcdefghijkmnopq&h=12345678&s=12345678';
$cipherText = $rsa->encryptStringENC($plainText,false);
if ($rsa->get_LastMethodSuccess() == false) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

// 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.
print $cipherText . "\n";

?>