PKCS7 Encrypt using Multiple Certificates

Encrypts MIME using multiple digital certificates. Calls AddEncryptCert once per certificate, followed by a call to EncryptN. The MIME may be decrypted by any owner of one of the certificates + its associated private key.

 Chilkat Perl Module Downloads for Windows, Linux, and MAC OS X

use chilkat();


$mime = new chilkat::CkMime();

$success = $mime->UnlockComponent("Anything for 30-day trial.");
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

#  Build a simple MIME message to be encrypted:
$mime->AddHeaderField("Content-Type","text/plain");
$mime->AddHeaderField("abc","123");
$mime->SetBody("This is a test");

#  A digital certificate is required to create PKCS7 encrypted MIME.
#  It can come from a variety of sources: .cer file, .pfx file, PEM files,
#  an in-memory representation, or directly from a Windows
#  registry-based certificate store.

#  Load one cert from a .cer file:
$cert1 = new chilkat::CkCert();
$success = $cert1->LoadFromFile("myCert.cer");
if ($success == 0) {
    print $cert1->lastErrorText() . "\r\n";
    exit;
}

#  Load another cert from the Windows registry store:
$cert2 = new chilkat::CkCert();
$success = $cert2->LoadByCommonName("Chilkat Sales");
if ($success == 0) {
    print $cert2->lastErrorText() . "\r\n";
    exit;
}

#  Tell the MIME object to use these certs for encrypting:
#  (AddEncryptCert shouldn't fail if we already know it contains
#  a valid certificate..)
$success = $mime->AddEncryptCert($cert1);
$success = $mime->AddEncryptCert($cert2);

#  Encrypt the MIME:
$success = $mime->EncryptN();
if ($success == 0) {
    print $mime->lastErrorText() . "\r\n";
    exit;
}

#  Display the MIME:
print $mime->getMime() . "\r\n";

#  The resulting S/MIME looks something like this:
#  
abc: 123
Content-Disposition: attachment; filename="smime.p7m"
Content-Transfer-Encoding: base64
Content-Type: application/x-pkcs7-mime;
 name="smime.p7m"

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