PowerShell

Get a JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.GetUnprotectedH, which copies the optional unprotected header of a signature into a JsonObject.

Background. The unprotected header is present only in JSON serialization forms that carry one. It is not covered by the signature.

Chilkat PowerShell Downloads

Download Chilkat for PowerShell

PowerShell

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

$success = $false

$jws = New-Object Chilkat.Jws

#  Load the JWS compact serialization.
$jwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
$success = $jws.LoadJws($jwsCompact)
if ($success -eq $false) {
    $($jws.LastErrorText)
    exit
}

#  Copy the optional unprotected header of signature 0 into a JsonObject.  This applies to JWS in a
#  JSON serialization form that carries an unprotected header.
$json = New-Object Chilkat.JsonObject
$success = $jws.GetUnprotectedH(0,$json)
if ($success -eq $false) {
    $($jws.LastErrorText)
    exit
}

$json.EmitCompact = $false
$($json.Emit())