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

See more RSA Examples

Note: This example requires Chilkat v11.0.0 or greater.

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

use chilkat();

$success = 0;

# 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 == 0) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# Find the certificate by the subject common name:
$jsonCN = chilkat::CkJsonObject->new();
$jsonCN->UpdateString("CN","cert common name");

$cert = chilkat::CkCert->new();
$success = $certStore->FindCert($jsonCN,$cert);
if ($success == 0) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

$privKey = chilkat::CkPrivateKey->new();
$success = $cert->GetPrivateKey($privKey);
if ($success == 0) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

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

$success = $rsa->UsePrivateKey($privKey);
if ($success == 0) {
    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";