PHP Requires Chilkat v11.0.0+

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. Chilkat2 PHP

<?php

use Chilkat2\Pfx;
use Chilkat2\PrivateKey;
use Chilkat2\Rsa;

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

$rsa = new Rsa();

// Load the .pfx/.p12
$pfx = new Pfx();
try {
    $pfx->LoadPfxFile('qa_data/pfx/myKey.p12', 'myPassword');

    // Get the default private key.

    $privKey = new PrivateKey();
    $pfx->PrivateKeyAt(0, $privKey);

    // Import the private key into the RSA component:
    $rsa->UsePrivateKey($privKey);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

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

echo $base64Sig, "\n";

echo "Success!\n";