Perl

Encrypt StringBuilder Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.EncryptSb, which encrypts content supplied in a StringBuilder and writes the resulting JWE into another StringBuilder.

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.

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Perl

use chilkat();

$success = 0;

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

#  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
#  encryption algorithm (enc).
$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;
}

#  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 == 0) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

#  Encrypt content supplied in a StringBuilder, writing the resulting JWE into another StringBuilder.
$sbContent = chilkat::CkStringBuilder->new();
$sbContent->Append("This is the secret content.");

$sbJwe = chilkat::CkStringBuilder->new();
$success = $jwe->EncryptSb($sbContent,"utf-8",$sbJwe);
if ($success == 0) {
    print $jwe->lastErrorText() . "\r\n";
    exit;
}

print $sbJwe->getAsString() . "\r\n";