Perl

Set Cert and Private Key for S/MIME Decryption

Demonstrates the Chilkat Imap.SetDecryptCert2 method, which specifies a certificate together with a separately supplied private key for decrypting S/MIME messages. The first argument is the Cert and the second is the PrivateKey. This example loads the certificate and key from separate files.

Note: The certificate path is relative to the application's current working directory. Supply the path to your own certificate file.

Background: Sometimes the certificate (the public part) and the private key are stored separately — a .cer alongside a PEM key file, for instance. This method pairs them explicitly, whereas SetDecryptCert expects a single Cert that already provides its private key. After the pairing, subsequently downloaded S/MIME messages are decrypted automatically.

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use strict;
use warnings;
use Chilkat2;

# Demonstrates the Imap.SetDecryptCert2 method, which specifies a certificate together with a
# separately supplied private key for decrypting S/MIME messages.  The 1st argument is the
# Cert and the 2nd is the PrivateKey.

my $imap = Chilkat2::Imap->new;

$imap->Ssl(1);
$imap->Port(993);

my $success = $imap->Connect('imap.example.com');
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

$success = $imap->Login('user@example.com', 'myPassword');
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

# Load the certificate and its private key from separate files.
my $cert = Chilkat2::Cert->new;
$success = $cert->LoadFromFile('qa_data/smime.cer');
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

my $privKey = Chilkat2::PrivateKey->new;
$success = $privKey->LoadPemFile('qa_data/smime_privkey.pem');
if (!$success) {
    print $privKey->LastErrorText, "\n";
    exit;
}

# Use the cert and key to automatically decrypt subsequently downloaded S/MIME messages.
$success = $imap->SetDecryptCert2($cert, $privKey);
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}

$success = $imap->Disconnect();
if (!$success) {
    print $imap->LastErrorText, "\n";
    exit;
}