(PHP ActiveX) RSA Sign utf-8 Byte Representation of String

Demontstrates how to sign the utf-8 byte representation of a string.

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

// Load an RSA private key for signing.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$privKey = new COM("Chilkat.PrivateKey");
$success = $privKey->LoadEncryptedPemFile('qa_data/pem/rsa_passwd.pem','passwd');
if ($success != 1) {
    print $privKey->LastErrorText . "\n";
    exit;
}

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

$originalData = 'This is the string to be hashed an RSA signed.';

// Indicate that we want the utf-8 byte representation of the string to be signed
$rsa->Charset = 'utf-8';

// We want the RSA signature in base64 format
$rsa->EncodingMode = 'base64';

$sigBase64 = $rsa->signStringENC($originalData,'sha256');
print $sigBase64 . "\n";

?>