PHP Extension

RSA Sign Using Private Key from .pfx/.p12 to Base64 Signature

See more RSA Examples

Demonstrates how to RSA sign something using a private key loaded from a .pfx/.p12. The RSA signature is returned in Base64 encoded format. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

$rsa = new CkRsa();

// Load the .pfx/.p12
$pfx = new CkPfx();
$success = $pfx->LoadPfxFile('qa_data/pfx/myKey.p12','myPassword');
if ($success == false) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

// Get the default private key.

$privKey = new CkPrivateKey();
$success = $pfx->PrivateKeyAt(0,$privKey);
if ($success == false) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

// Import the private key into the RSA component:
$success = $rsa->UsePrivateKey($privKey);
if ($success == false) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

// Get the signature in base64
$rsa->put_EncodingMode('base64');

$strData = 'This is the string to be signed.';

// Sign the string using the sha256 hash algorithm.
// Other valid choices are "sha384", "sha512", "sha-1", "md2" and "md5".
$base64Sig = $rsa->signStringENC($strData,'sha256');

print $base64Sig . "\n";

print 'Success!' . "\n";

?>