(Perl) Sign a File to Create a .p7m File (using a PFX)

Perl example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

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.

$crypt = chilkat::CkCrypt2->new();

# Use a digital certificate and private key from a PFX file (.pfx or .p12).
$signingCertSubject = "Acme Inc";
$pfxFilename = "/Users/chilkat/testData/pfx/acme.pfx";
$pfxPassword = "test123";

$certStore = chilkat::CkCertStore->new();
$success = $certStore->LoadPfxFile($pfxFilename,$pfxPassword);
if ($success != 1) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# cert is a Cert
$cert = $certStore->FindCertBySubjectCN($signingCertSubject);
if ($certStore->get_LastMethodSuccess() == 0) {
    print "Failed to find certificate by subject common name." . "\r\n";
    exit;
}

# Tell the crypt component to use this cert.
$success = $crypt->SetSigningCert($cert);

# We can sign any type of file, creating a .p7m as output:
$inFile = "/Users/chilkat/testData/pdf/sample.pdf";
$outputFile = "/Users/chilkat/testData/p7m/sample.pdf.p7m";
$success = $crypt->CreateP7M($inFile,$outputFile);
if ($success == 0) {
    print $crypt->lastErrorText() . "\r\n";

    exit;
}

# Verify and restore the original file:
$success = $crypt->SetVerifyCert($cert);

$inFile = $outputFile;
$outputFile = "/Users/chilkat/testData/pdf/restored.pdf";

$success = $crypt->VerifyP7M($inFile,$outputFile);
if ($success == 0) {
    print $crypt->lastErrorText() . "\r\n";

    exit;
}

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