(PHP ActiveX) RSA Import Public Key from Certificate PEM

Uses a certificate's public key for RSA encryption. The public key from the certificate .pem file is used.

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

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

$success = $cert->LoadFromFile('qa_data/pem/mf_public_rsa.pem');
if ($success == 0) {
    print $cert->LastErrorText . "\n";
    exit;
}

// pubKey is a Chilkat.PublicKey
$pubKey = $cert->ExportPublicKey();
if ($cert->LastMethodSuccess != 1) {
    print $cert->LastErrorText . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa')
$rsa = new COM("Chilkat.Rsa");
$success = $rsa->ImportPublicKeyObj($pubKey);
if ($success == 0) {
    print $rsa->LastErrorText . "\n";
    exit;
}

$rsa->EncodingMode = 'base64';
$encryptedStr = $rsa->encryptStringENC('hello',0);
print 'encrypted string = ' . $encryptedStr . "\n";

?>