(Perl) Send Signed Email using PFX File (long version)

Demonstrates how to send a signed email using a digital certificate w/ private key stored in a PFX file.

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.

# The mailman object is used for sending and receiving email.
$mailman = chilkat::CkMailMan->new();

# Set the SMTP server.
$mailman->put_SmtpHost("smtp.mymailserver.com");

# Create a new email object
$email = chilkat::CkEmail->new();

$email->put_Subject("This email is signed");
$email->put_Body("This is a digitally signed mail");
$email->put_From('Chilkat Admin <admin@chilkatsoft.com>');
$success = $email->AddTo("Chilkat Support",'support@chilkatsoft.com');

# Indicate that the email should be sent signed.
$email->put_SendSigned(1);

# Load a PFX file into a certificate store object.
# Then locate the certificate matching the  sender's email address,
# and use it for signing.
# (a PFX file may contain more than one certificate.)
$certStore = chilkat::CkCertStore->new();
# The 1st argument is the path of the PFX file, the 2nd arg is the 
# PFX file's password:
$success = $certStore->LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret");
if ($success != 1) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# cert is a Cert
$cert = $certStore->FindCertBySubjectE('admin@chilkatsoft.com');
if ($certStore->get_LastMethodSuccess() == 0) {
    print $certStore->lastErrorText() . "\r\n";
    exit;
}

# Alternatively, if a PFX file is known to contain a single certificate,
# you may load it directly into a Chilkat certificate object.
# This snippet of source code shows how:
$cert2 = chilkat::CkCert->new();
# The 1st argument is the filename, the 2nd arg is the 
# PFX file's password:
$success = $cert2->LoadPfxFile("/pfx_files/chilkatsoft_secret.pfx","secret");
if ($success != 1) {
    print $cert2->lastErrorText() . "\r\n";

    exit;
}

# This example will use the cert from the certStore...
$success = $email->SetSigningCert($cert);

# Signed email can be sent in two different ways.  
# In a multipart/signed email, the signature is attached as a separate MIME part.
# In an opaque email (signedData) the content of the email is encapsulated within the signature
# and the email is sent as "application/pkcs7-mime". 
# Either should be fine, but some receiving systems might require one or the other..
$mailman->put_OpaqueSigning(0);

# Send a signed email.
$success = $mailman->SendEmail($email);
if ($success != 1) {
    print $mailman->lastErrorText() . "\r\n";
}
else {
    # The LastErrorText property provides information
    # even when successful.
    print $mailman->lastErrorText() . "\r\n";
    print "Mail Sent!" . "\r\n";
}