PHP ActiveX

Check if a MIME Entity is Encrypted (S/MIME)

Demonstrates the Chilkat Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: This tells you a message is encrypted and must be decrypted before its real content is available — the trigger for supplying a recipient certificate and private key to Decrypt. Reading the body without decrypting first would just yield the opaque PKCS #7 blob.

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<?php

$success = 0;

//  Demonstrates the Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper.  It takes no arguments.

$mime = new COM("Chilkat.Mime");
$success = $mime->LoadMimeFile('qa_data/encrypted.eml');
if ($success == 0) {
    print $mime->LastErrorText . "\n";
    exit;
}

if ($mime->IsEncrypted()) {
    print 'This is an encrypted S/MIME message.' . "\n";
}
else {
    print 'This is not an encrypted S/MIME message.' . "\n";
}


?>