PHP

Add a PFX Source (BinData) for S/MIME Decryption

Demonstrates the Chilkat Imap.AddPfxSourceBd method, which adds PFX data held in a BinData as a source of certificates and private keys for S/MIME processing. The first argument is the BinData and the second is the PFX password. Call it once for each additional source.

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

Background: When downloading encrypted (S/MIME) email, Chilkat needs the recipient's private key to decrypt it. Adding one or more PFX sources gives Chilkat a pool of keys to search; the matching key is used automatically as messages are fetched. The BinData form is handy when the PFX comes from memory — a database blob or a downloaded buffer — rather than a file on disk. On Windows and macOS the system certificate stores are also searched automatically.

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Chilkat2 PHP

<?php

use Chilkat2\BinData;
use Chilkat2\Imap;

// Demonstrates the Imap.AddPfxSourceBd method, which adds PFX data (from a BinData) as a
// source of certificates and private keys for S/MIME decryption.  The 1st argument is the
// BinData containing the PFX, and the 2nd is the PFX password.

$imap = new Imap();

$imap->Ssl = true;
$imap->Port = 993;

try {
    $imap->Connect('imap.example.com');

    $imap->Login('user@example.com', 'myPassword');

    // Load the PFX data into a BinData.
    $bdPfx = new BinData();
    $bdPfx->LoadFile('qa_data/smime.pfx');

    // The PFX password is not hard-coded in source.  Insert code here to obtain it from an
    // interactive prompt, environment variable, or a secrets vault.
    $pfxPassword = '';

    // Add the PFX as a source for S/MIME certificates and private keys.  Call once per source.
    $imap->AddPfxSourceBd($bdPfx, $pfxPassword);

    // Messages downloaded after this are automatically decrypted when a matching key is found.

    $imap->Disconnect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}