Decrypt a JWE into a StringBuilder

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.DecryptSb, which decrypts a recipient of a loaded JWE and writes the plaintext into a StringBuilder.

<?php

$success = 0;

$jwe = new COM("Chilkat.Jwe");

//  Load the JWE compact serialization to be decrypted.
$jweCompact = 'eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>';
$success = $jwe->LoadJwe($jweCompact);
if ($success == 0) {
    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.
$base64Key = 'YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=';
$success = $jwe->SetWrappingKey(0,$base64Key,'base64');
if ($success == 0) {
    print $jwe->LastErrorText . "\n";
    exit;
}

//  Decrypt recipient index 0, writing the plaintext into a StringBuilder.
$sbContent = new COM("Chilkat.StringBuilder");
$success = $jwe->DecryptSb(0,'utf-8',$sbContent);
if ($success == 0) {
    print $jwe->LastErrorText . "\n";
    exit;
}

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

?>