(PHP ActiveX) Load .eml and Decrypt (smime.p7m)

Loads an encrypted email from a .eml file and decrypts using certificate w/ private key found in a .p12 (or .pfx) file.

The Content-Type and Content-Disposition email headers of the email to be decrypted look similar to this:

Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data;
	name="smime.p7m"
Content-Disposition: attachment; filename="smime.p7m"

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Email')
$email = new COM("Chilkat.Email");

// Add a PFX (or .p12) to be used for decryption
$success = $email->AddPfxSourceFile('myCert.p12','passwordForP12');
if ($success != 1) {
    print $email->LastErrorText . "\n";
    exit;
}

// Loading the .eml automatically decrypts.
$success = $email->LoadEml('encrypted.eml');
if ($success != 1) {
    print $email->LastErrorText . "\n";
    exit;
}

// The email now exists as it was prior to encryption.
// Your app may access the email's subject, body, attachments,
// etc. using the Chilkat Email API...

// Save the decrypted email:
$success = $email->SaveEml('decrypted.eml');
if ($success != 1) {
    print $email->LastErrorText . "\n";
    exit;
}

print 'Success.' . "\n";

?>