Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

use chilkat();

$success = 0;

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

#  Load the JWS compact serialization.
$jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>";
$success = $jws->LoadJws($jwsCompact);
if ($success == 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

#  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
#  signature is cryptographically valid, 0 when it is not, or a negative value on error.
$base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=";
$success = $jws->SetMacKey(0,$base64Key,"base64");
if ($success == 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

$v = $jws->Validate(0);
if ($v < 0) {
    print $jws->lastErrorText() . "\r\n";
    exit;
}

if ($v != 1) {
    print "The signature is not valid." . "\r\n";
    exit;
}

print "The signature is valid." . "\r\n";