(PHP Extension) 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 PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$email = new CkEmail();

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

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

print 'Success.' . "\n";

?>