(PHP Extension) POP3 Read S/MIME Encrypted Email

Read S/MIME encrypted email.

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");

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// The mailman object is used for receiving (POP3) 
// and sending (SMTP) email.
$mailman = new CkMailMan();

// Set the POP3 server's hostname
$mailman->put_MailHost('pop.someMailServer.com');

// Set the POP3 login/password.
$mailman->put_PopUsername('myLogin');
$mailman->put_PopPassword('myPassword');

// If running on Microsoft Windows, the Chilkat mailman
// will automatically search the registry-based certificate stores
// for matching certificates and private keys required for
// decryption.  However, on Linux, MAX OS X, and other
// operating systems, no such thing exists.  Therefore, you'll 
// need to specify one or more PFX (.p12 / .pfx) files as
// sources for locating the certs required for decyrption.
$success = $mailman->AddPfxSourceFile('/pfxFiles/certs_and_keys_1.pfx','pfxPassword1');
if ($success != true) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

$success = $mailman->AddPfxSourceFile('/pfxFiles/certs_and_keys_2.pfx','pfxPassword2');
if ($success != true) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

// ...
// Note: On MS Windows, it is not required to provide PFX sources
// if the needed certs and private keys are already installed
// on the system (in the registry-based certificate stores).

// Copy the all email from the user's POP3 mailbox 
// into a bundle object.  The email remains on the server.
// bundle is a CkEmailBundle
$bundle = $mailman->CopyMail();
if ($mailman->get_LastMethodSuccess() == false) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

// S/MIME security envelopes are automatically "unwrapped" 
// when a message is retrieved from the server. Signed emails are automatically verified, and 
// encrypted emails are automatically decrypted, restoring the email to the original state before 
// signing and/or encrypting. Information about the signing and encrypting certificates can be 
// retrieved from the Email object (methods: GetSignedByCert, GetEncryptedByCert; 
// properties: SignedBy, EncryptedBy, SignaturesValid, Decrypted, ReceivedSigned, 
// ReceivedEncrypted).

// Loop over the bundle, 
$i = 0;
while ($i < $bundle->get_MessageCount()) {

    // email is a CkEmail
    $email = $bundle->GetEmail($i);

    print $email->from() . "\n";
    print $email->subject() . "\n";

    // At this point, if the email was signed and/or encrypted, it is already "unwrapped", i.e.
    // the email is already decrypted and in a state as if it were never signed or encrypted.
    // You may check to see if the email was received encrypted or signed, and if so,
    // whether it was successfully unwrapped and who signed or encrypted it:
    if ($email->get_ReceivedEncrypted() == true) {

        print 'This email was encrypted when received.' . "\n";
        if ($email->get_Decrypted() == true) {
            print 'This email was successfully decrypted.  It was encrypted by:' . "\n";
            print $email->encryptedBy() . "\n";
        }
        else {
            print 'This email was not decrypted.' . "\n";
        }

    }

    if ($email->get_ReceivedSigned() == true) {

        print 'This email was signed when received.' . "\n";
        if ($email->get_SignaturesValid() == true) {
            print 'The signature was verified.  It was signed by:' . "\n";
            print $email->signedBy() . "\n";
        }
        else {
            print 'The signature verification failed.' . "\n";
        }

    }

    // The email's body, HTML body, attachments, etc.
    // are decrypted and available just like any non-encrypted email.

    print '--' . "\n";

    $i = $i + 1;
}


?>