(Perl) Duplicate OpensSSL to Sign File and Output Binary DER

This example duplicates the following:

openssl smime -sign -in INPUT.xml -signer SIGN.PEM -passin pass:MYPASS -outform der -binary -nodetach -out SIGNED.P7M

Note: Although "smime" is the OpenSSL command, it's not actually producing S/MIME. The arguments "-outform der -binary" indicates that the output is binary DER (i.e. the PKCS7 binary signature). The input can be any type of file: XML, PDF, JPG, ... *anything*...

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();

# Load the PEM containing cert + private key.
$pem = chilkat::CkPem->new();
$success = $pem->LoadPemFile("qa_data/pem/myPem.pem","password");
if ($success != 1) {
    print $pem->lastErrorText() . "\r\n";
    exit;
}

# privkey is a PrivateKey
$privkey = $pem->GetPrivateKey(0);
if ($pem->get_LastMethodSuccess() != 1) {
    print $pem->lastErrorText() . "\r\n";
    exit;
}

# cert is a Cert
$cert = $pem->GetCert(0);
if ($pem->get_LastMethodSuccess() != 1) {

    print $pem->lastErrorText() . "\r\n";
    exit;
}

$success = $crypt->SetSigningCert2($cert,$privkey);
if ($success != 1) {

    print $crypt->lastErrorText() . "\r\n";
    exit;
}

# Alternatively, we could use a .pfx/.p12 file.
# (Chilkat also supports other formats/sources for cert/private keys...)
$certFromP12 = chilkat::CkCert->new();
$success = $certFromP12->LoadPfxFile("qa_data/p12/myP12.p12","password");
if ($success != 1) {
    print $certFromP12->lastErrorText() . "\r\n";
    exit;
}

# The certificate, when loaded from a .pfx/.p12, will automatically 
# include the associated private key, assuming it's present in the .p12.
# We don't have to explicitly provide the private key as in the
# lines of code above that use the PEM file.
$success = $crypt->SetSigningCert($certFromP12);
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

# Create the opaque signature (PKCS7 binary DER that contains both the signature and original file data).
$success = $crypt->CreateP7M("qa_data/infile.anything","qa_output/outfile.p7m");
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

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