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

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

Note: This example requires Chilkat v11.0.0 or greater.

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<?php

include("chilkat.php");

$success = false;

// 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.
$privKey = new CkPrivateKey();
$success = $privKey->LoadEncryptedPemFile('qa_data/pem/rsa_passwd.pem','passwd');
if ($success == false) {
    print $privKey->lastErrorText() . "\n";
    exit;
}

$rsa = new CkRsa();
$success = $rsa->UsePrivateKey($privKey);
if ($success == false) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

$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->put_Charset('utf-8');

// We want the RSA signature in base64 format
$rsa->put_EncodingMode('base64');

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

?>