(Perl) RSA Signature with Certificate's Private Key from PFX

See more RSA Examples

Demonstrates how to use a certificate's private key from a PFX file to create an RSA signature.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

# Create an instance of a certificate store object, load a PFX file,
# locate the certificate we need, and use it for signing.
# (a PFX file may contain more than one certificate.)
$certStore = chilkat::CkCertStore->new();

# The 1st argument is the filename, the 2nd arg is the 
# PFX file's password:
$success = $certStore->LoadPfxFile("chilkat.pfx","test");
if ($success != 1) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# cert is a Cert
$cert = $certStore->FindCertBySubject("Chilkat Software, Inc.");
if ($certStore->get_LastMethodSuccess() == 0) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# pkey is a PrivateKey
$pkey = $cert->ExportPrivateKey();
if ($cert->get_LastMethodSuccess() == 0) {
    print $cert->lastErrorText() . "\r\n";

    exit;
}

# Get the private key in XML format:
$pkeyXml = $pkey->getXml();

$rsa = chilkat::CkRsa->new();

# Import the private key into the RSA component:
$success = $rsa->ImportPrivateKey($pkeyXml);
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";

    exit;
}

# Encode the signature as a hex string
$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 "sha-256", "md2" and "md5".
$hexSig = $rsa->signStringENC($strData,"sha-1");

print $hexSig . "\r\n";

print "Success!" . "\r\n";