Decrypt a JWE with a Private Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetPrivateKey, which sets the private key used to decrypt a recipient of a loaded JWE.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

<?php

include("chilkat.php");

$success = false;

$jwe = new CkJwe();

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

//  The file path is relative to the application's current working directory.  An absolute path
//  may also be used.  Supply the path appropriate to your own environment.
//  Load the recipient's private key.
$privKey = new CkPrivateKey();
$success = $privKey->LoadPemFile('qa_data/recipient_privkey.pem');
if ($success == false) {
    print $privKey->lastErrorText() . "\n";
    exit;
}

//  Set the private key used to decrypt recipient 0.
$success = $jwe->SetPrivateKey(0,$privKey);
if ($success == false) {
    print $jwe->lastErrorText() . "\n";
    exit;
}

$content = $jwe->decrypt(0,'utf-8');
if ($jwe->get_LastMethodSuccess() == false) {
    print $jwe->lastErrorText() . "\n";
    exit;
}

print $content . "\n";

?>