PHP

Encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption

See more MIME Examples

Demonstrates how to encrypt MIME using RSAES-OAEP with SHA256 and AES-128 content encryption.

Note: This example requires Chilkat v9.5.0.67 or greater.

Chilkat2 PHP

<?php

use Chilkat2\Cert;
use Chilkat2\Mime;
use Chilkat2\StringBuilder;

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

$mime = new Mime();

// Create a MIME message to encrypt.
$mime->NewMultipartMixed();
$mime->AddHeaderField('someHeader1', 'Some value 1');
$mime->AddHeaderField('someHeader2', 'Some value 2');

$part0 = new Mime();
$part0->AddHeaderField('hdrA', 'Some value A');
$part0->AddHeaderField('hdrB', 'Some value B');
$part0->ContentType = 'text/plain';
$part0->SetBody('This is the plain-text body.');

$part1 = new Mime();
$part1->AddHeaderField('hdrX', 'Some value X');
$part1->AddHeaderField('hdrY', 'Some value Y');
$part1->ContentType = 'text/xml';
$part1->SetBody('<a>This is the XML body</a>');

$mime->AppendPart($part0);
$mime->AppendPart($part1);

// The MIME to be encrypted:
$sbMime = new StringBuilder();
$mime->GetMimeSb($sbMime);
echo $sbMime->GetAsString(), "\n";

//     Content-Type: multipart/mixed; boundary="------------080303020600020604010008"
//     someHeader1: Some value 1
//     someHeader2: Some value 2
//
//     --------------080303020600020604010008
//     hdrA: Some value A
//     hdrB: Some value B
//     Content-Type: text/plain
//
//     This is the plain-text body.
//     --------------080303020600020604010008
//     hdrX: Some value X
//     hdrY: Some value Y
//     Content-Type: text/xml
//
//     <a>This is the XML body</a>
//     --------------080303020600020604010008--
//

// Load an RSA-based certificate.
// (Encrypting MIME only requires the public key.  Decrypting MIME requires the private key.)
$cert = new Cert();
try {
    $cert->LoadFromFile('qa_data/rsaes-oaep/cert.pem');

    // Set the email object properties to indicate the desired encryption.
    $mime->Pkcs7CryptAlg = 'aes';
    // If AES-256 is desired, set the following property to 256.
    $mime->Pkcs7KeyLength = 128;
    $mime->OaepPadding = true;
    // Other choices for the OAEP hash algorithm are "sha1", "sha384", and "sha512"
    $mime->OaepHash = 'sha256';

    // Encrypt the MIME (to create S/MIME, which stands for "Secure MIME")
    $mime->Encrypt($cert);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "---------------\n";
echo "Encrypted MIME:\n";
echo "---------------\n";
echo $mime->GetMime(), "\n";

echo "Success.\n";

// ---------------------------------------------------
// This is sample output for RSAES-OAEP encrypted MIME:
// ---------------------------------------------------

// Content-Type: application/x-pkcs7-mime; name="smime.p7m"; smime-type="enveloped-data"
// someHeader1: Some value 1
// someHeader2: Some value 2
// Content-Disposition: attachment; filename="smime.p7m"
// Content-Transfer-Encoding: base64
//
// MIIDvAYJKoZIhvcNAQcDoIIDrTCCA6kCAQAxggGgMIIBnAIBADB1MGgxCzAJBgNVBAYTAlVTMQsw
// CQYDVQQIDAJJTDEQMA4GA1UEBwwHV2hlYXRvbjEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQ
// dHkgTHRkMRcwFQYDVQQDDA5DaGlsa2F0V2lkZ2V0cwIJAMRwugDmvniwMBwGCSqGSIb3DQEBBzAP
// oA0wCwYJYIZIAWUDBAIBBIIBAFaUL1ga1bOrdqYKcMm+FHUacBvzfBxk0fnPA0AMBdN8BvTWT3CN
// YuqBhjOGyq0FpYD9pVZybUuFMCVsVyIW2O62HnsOK58YaPEUUcdH2sI+yjqX9UAn0P0nVDSsVdeK
// W8x9kMfZg+3UP+y1q+lu7VRJO3f2C9oLQpTkc4VW4n7UOcUI0waykLCjCTL8lFDb7/J3GeuMKyhH
// 5riNz50kpbzqn7m2Ks9yA+QmcTdXclclGFr2vwEUFzSdT2pxh/vaUrogCxkYWbQ2eV7vZg6O4kV0
// aqHBqySkPTAzHKiHH8K8GVdlTuJ8350CpICa4T8w7/Ht5I7dyOPPKy4C+rVtrvcwggH+BgkqhkiG
// 9w0BBwEwHQYJYIZIAWUDBAECBBDTC2WNBN+z2I47/4Feu9YqgIIB0MZvl3nC/q/Wzil6HtfQTr12
// Q5moHY+ORzAa1P9XvX2ZUFhW530mV395mQw/A4o4ekmX9eRPEZquYzZPLT8hNeZIuNdhpcSQUmad
// rKnKkR0wKJ3jJ3LhOIohVBQSYs8kVDZKq6lJBIznlsurFelZoNEhyRschhteDZx5rb7fCe8c2+/O
// DHxaqaHCAzm/Bd7kcg6FFfuTZy3tu0PgP5IsXN4OFA3kkvwjAs4XsVS8jdIcmDNBkYieE8WmJOIm
// Mz7mh/CHWLgWfGKa0Dkb9RcbFgLwYNT3GzuXFw9XPbKkEZjEAtJajWbN6P0WQl96YYd9qZxUpGxZ
// zjTHEYzViUdUXolfpLufttrRXyxN1RFWhNFMFbv66xYqklMSgpdM/Mbk+EuvX6eXayDPvDBpfYMw
// NoRAzv1Ony2c0ez9rBemJICicxAzpuvHbRxdjYs63Dnv+TYgpBK12AxWWpPIjXvw0WQKgTC3Tg8s
// EnuGhpENqso/clJBEBSn4+2WhYtYbdI5sVme67lvqQl1Xxy3r18SWaQbyDOwgYi1E+54lMDOxMy0
// y0FPHk5pP45DnXWj+XORPp5LhuZr5mf62YOXSSUwR5P0cXy4Rc+pN5lhRQPCf5z2