(PHP Extension) RSA Sign with PKCS8 Encrypted Key
Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.Note: This example requires Chilkat v11.0.0 or greater.
<?php
include("chilkat.php");
$success = false;
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
$pkey = new CkPrivateKey();
// Load the private key from an RSA PEM file:
$success = $pkey->LoadPkcs8EncryptedFile('privateKey.key','myPassword');
$rsa = new CkRsa();
// Import the private key into the RSA object:
$success = $rsa->UsePrivateKey($pkey);
if ($success == false) {
print $rsa->lastErrorText() . "\n";
exit;
}
// Return the signature in hex
$rsa->put_EncodingMode('hex');
$strData = 'This is the string to be signed.';
// Sign the string using the sha-1 hash algorithm.
// Other valid choices are "md2", "sha256", "sha384", "sha512", and "md5".
$hexSig = $rsa->signStringENC($strData,'sha-1');
print $hexSig . "\n";
?>
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