PHP Extension

Load a JWE from a String

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.LoadJwe, which loads a JWE from its compact serialization string so it can be decrypted.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

Chilkat PHP Extension Downloads

Download Chilkat for PHP Extension

PHP Extension

<?php

include("chilkat.php");

$success = false;

$jwe = new CkJwe();

//  Load a JWE from its compact serialization string.
$jweCompact = 'eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>';
$success = $jwe->LoadJwe($jweCompact);
if ($success == false) {
    print $jwe->lastErrorText() . "\n";
    exit;
}

//  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
//  from a secure source rather than hard-coding it.
$base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
$success = $jwe->SetWrappingKey(0,$base64Key,'base64');
if ($success == false) {
    print $jwe->lastErrorText() . "\n";
    exit;
}

//  The loaded JWE can now be decrypted.
$content = $jwe->decrypt(0,'utf-8');
if ($jwe->get_LastMethodSuccess() == false) {
    print $jwe->lastErrorText() . "\n";
    exit;
}

print $content . "\n";

?>