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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Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

my $jwe = Chilkat2::Jwe->new;

# Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
# encryption algorithm (enc).
my $header = Chilkat2::JsonObject->new;
$header->UpdateString('alg', 'A256KW');
$header->UpdateString('enc', 'A256GCM');
my $success = $jwe->SetProtectedHeader($header);
if (!$success) {
    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.
my $base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
$success = $jwe->SetWrappingKey(0, $base64Key, 'base64');
if (!$success) {
    print $jwe->LastErrorText, "\n";
    exit;
}

# Encrypt content supplied in a StringBuilder, writing the resulting JWE into another StringBuilder.
my $sbContent = Chilkat2::StringBuilder->new;
$sbContent->Append('This is the secret content.');

my $sbJwe = Chilkat2::StringBuilder->new;
$success = $jwe->EncryptSb($sbContent, 'utf-8', $sbJwe);
if (!$success) {
    print $jwe->LastErrorText, "\n";
    exit;
}

print $sbJwe->GetAsString(), "\n";