(PHP ActiveX) Create PKCS1 RSA Signature with PEM Private Key
Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.
<?php
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$pkey = new COM("Chilkat_9_5_0.PrivateKey");
// Load the private key from an RSA PEM file:
$success = $pkey->LoadPemFile('pvkey2_rsa.pem');
// Get the private key in XML format:
$pkeyXml = $pkey->getXml();
$rsa = new COM("Chilkat_9_5_0.Rsa");
// Import the private key into the RSA object:
$success = $rsa->ImportPrivateKey($pkeyXml);
if ($success != 1) {
print $rsa->LastErrorText . "\n";
exit;
}
// Get the signature as hex.
$rsa->EncodingMode = 'hex';
$strData = 'This is the string to be signed.';
// Sign the string using the sha-1 hash algorithm.
// Other valid choices are "md2", "md5", "sha256",
// "sha384", and "sha512".
$hexSig = $rsa->signStringENC($strData,'sha-1');
print $hexSig . "\n";
print 'Success!' . "\n";
?>
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