Sign a JWS with an HMAC Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetMacKey, which sets the symmetric MAC key for a signature. The key bytes are supplied in a named encoding such as hex or base64.

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

$jws = New-Object Chilkat.Jws

#  Protected header specifying HMAC-SHA256.
$header = New-Object Chilkat.JsonObject
$header.UpdateString("alg","HS256")
$success = $jws.SetProtectedHeader(0,$header)
if ($success -eq $false) {
    $($jws.LastErrorText)
    exit
}

$bIncludeBom = $false
$success = $jws.SetPayload("This is the content to sign.","utf-8",$bIncludeBom)
if ($success -eq $false) {
    $($jws.LastErrorText)
    exit
}

#  Set the symmetric MAC key for signature 0.  The key bytes are provided in the named encoding (here
#  base64).  In production, obtain the key from a secure source rather than hard-coding it.
$base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
$success = $jws.SetMacKey(0,$base64Key,"base64")
if ($success -eq $false) {
    $($jws.LastErrorText)
    exit
}

$jwsCompact = $jws.CreateJws()
if ($jws.LastMethodSuccess -eq $false) {
    $($jws.LastErrorText)
    exit
}

$($jwsCompact)