Encrypt a JWE with a Symmetric Wrapping Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetWrappingKey, which sets the symmetric key-wrapping key for a recipient. The key bytes are supplied in a named encoding such as hex or base64.

use chilkat();

$success = 0;

$jwe = chilkat::CkJwe->new();

#  Protected header: AES key-wrap with AES-256-GCM content encryption.
$header = chilkat::CkJsonObject->new();
$header->UpdateString("alg","A256KW");
$header->UpdateString("enc","A256GCM");
$success = $jwe->SetProtectedHeader($header);
if ($success == 0) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

#  Set the symmetric key-wrapping key for recipient 0.  The key bytes are provided in the named
#  encoding (here base64).  In production, obtain the key from a secure source rather than hard-coding
#  it.
$base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
$success = $jwe->SetWrappingKey(0,$base64Key,"base64");
if ($success == 0) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

$jweCompact = $jwe->encrypt("This is the secret content.","utf-8");
if ($jwe->get_LastMethodSuccess() == 0) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

print $jweCompact . "\r\n";