(PHP ActiveX) Load Signed and/or Encrypted Email and Unwrap Security Layers

The LoadEml method loads an email (.eml file containing the MIME of an email) and automatically unwraps the digital signature and encryption security layers. A program can then examine the properties of the email object to see what was unwrapped.

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");

// Provide PFX/.p12 files for any certs+keys needed for decryption.
// Signature verification does not need anything extra.  
// (Also, Chilkat will automatically find and use pre-installed certs + private keys needed for decryption
// on a Windows system.)
$success = $email->AddPfxSourceFile('/pfxFiles/certs_and_keys_1.pfx','pfxPassword1');
if ($success != 1) {
    print $email->LastErrorText . "\n";
    exit;
}

$success = $email->AddPfxSourceFile('/pfxFiles/certs_and_keys_2.pfx','pfxPassword2');
if ($success != 1) {
    print $email->LastErrorText . "\n";
    exit;
}

// ...

// Load a potentially signed and/or encrypted email.
$success = $email->LoadEml('someDir/someEmail.eml');

// If the email was signed and/or encrypted, it was "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->ReceivedEncrypted == 1) {

    print 'This email was encrypted.' . "\n";
    if ($email->Decrypted == 1) {
        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->ReceivedSigned == 1) {

    print 'This email was signed.' . "\n";
    if ($email->SignaturesValid == 1) {
        print 'The signature was verified.  It was signed by:' . "\n";
        print $email->SignedBy . "\n";
    }
    else {
        print 'The signature verification failed.' . "\n";
    }

}

// At this point, the contents of the email, including attachments, can be accessed normally..

?>