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 Module Downloads for Windows, Linux, and MAC OS X

use chilkat();

$crypt = new chilkat::CkCrypt2();

#  Any string argument automatically begins the 30-day trial.
$success = $crypt->UnlockComponent("30-day trial");
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

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

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

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

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

    exit;
}

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

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

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

    exit;
}

print "Success!" . "\n";