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PHP Extension Examples

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(PHP Extension) PKCS7 Encrypt using Multiple Certificates

Encrypts MIME using multiple digital certificates. Calls AddEncryptCert once per certificate, followed by a call to EncryptN. The MIME may be decrypted by any owner of one of the certificates + its associated private key.

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MAC OS X,
Alpine Linux, Solaris, OpenBSD, FreeBSD,
and Linux armhf/aarch64

<?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");

$mime = new CkMime();

$success = $mime->UnlockComponent('Anything for 30-day trial.');
if ($success == false) {
    print $mime->lastErrorText() . "\n";
    exit;
}

//  Build a simple MIME message to be encrypted:
$success = $mime->AddHeaderField('Content-Type','text/plain');
$success = $mime->AddHeaderField('abc','123');
$mime->SetBody('This is a test');

//  A digital certificate is required to create PKCS7 encrypted MIME.
//  It can come from a variety of sources: .cer file, .pfx file, PEM files,
//  an in-memory representation, or directly from a Windows
//  registry-based certificate store.

//  Load one cert from a .cer file:
$cert1 = new CkCert();
$success = $cert1->LoadFromFile('myCert.cer');
if ($success == false) {
    print $cert1->lastErrorText() . "\n";
    exit;
}

//  Load another cert ...
$cert2 = new CkCert();
$success = $cert2->LoadFromFile('anotherCert.cer');
if ($success == false) {
    print $cert2->lastErrorText() . "\n";
    exit;
}

//  Tell the MIME object to use these certs for encrypting:
//  (AddEncryptCert shouldn't fail if we already know it contains
//  a valid certificate..)
$success = $mime->AddEncryptCert($cert1);
$success = $mime->AddEncryptCert($cert2);

//  Encrypt the MIME:
$success = $mime->EncryptN();
if ($success == false) {
    print $mime->lastErrorText() . "\n";
    exit;
}

//  Display the MIME:
print $mime->getMime() . "\n";

//  The resulting S/MIME looks something like this:

/*
abc: 123
Content-Disposition: attachment; filename="smime.p7m";
Content-Transfer-Encoding: base64
Content-Type: application/x-pkcs7-mime;
 name="smime.p7m";

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aXJzdC1DbGllbnQgQXV0aGVudGljYXRpb24gYW5kIEVtYWlsAhAj50QEWUPwA+jXOiL8sMwXMA0G
CSqGSIb3DQEBAQUABIIBAFQ1cydWC4M9tdgAlCN03kP8eyuXajwT+5ByhOcJhjuCABg7U8w4Rx28
braGqV+TCBxjyMsqD0KcW49VT6ZHMpQ1yN8R72qDsidmfm9w3u0jVgsaaBkTJXMy4COY/3cZWmYG
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xepR/oh60x/3npUCsl2VpNPfo6oZoej6YZGEuz2MvuWvXVhvuqoTqXGwGDgYMxwTbPwklqZiJtsK
r5Ep3NlWAQX8MGWL0H+NC22cqJuqUCL05yqyAv+JMCpZGAwOVb/wiVNjpAIwYAYJKoZIhvcNAQcB
MBkGCCqGSIb3DQMCMA0CAToECA5NAJY12cU+gDgZFUc+nsQUUbiR1GH8iBVLI+XWlja9TXEe1Hzt
NlsOylRVBDzjNxUtX/zC0YR7bs+2Cf4JbyuMOA==
*/

?>

 

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