Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

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.

use chilkat();

$success = 0;

$jws = chilkat::CkJws->new();

#  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
$header = chilkat::CkJsonObject->new();
$header->UpdateString("alg","RS256");
$success = $jws->SetProtectedHeader(0,$header);
if ($success == 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

$bIncludeBom = 0;
$success = $jws->SetPayload("This is the content to sign.","utf-8",$bIncludeBom);
if ($success == 0) {
    print $jws->lastErrorText() . "\r\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 signer's private key and set it for signature 0.
$privKey = chilkat::CkPrivateKey->new();
$success = $privKey->LoadPemFile("qa_data/signer_privkey.pem");
if ($success == 0) {
    print $privKey->lastErrorText() . "\r\n";
    exit;
}

$success = $jws->SetPrivateKey(0,$privKey);
if ($success == 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

$jwsCompact = $jws->createJws();
if ($jws->get_LastMethodSuccess() == 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

print $jwsCompact . "\r\n";