(PowerShell) Load JWK into PublicKey Object

Demonstrates how to load a Java Web Key (JWK) into a Chilkat public key object.

Note: This example requires Chilkat v9.5.0.66 or greater.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# Imagine we have this JWK:

# {
# "kty":"RSA",
# "kid":"bilbo.baggins@hobbiton.example",
# "use":"sig",
# "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
# "e":"65537"
# }
# 

$sbJwk = New-Object Chilkat.StringBuilder
$success = $sbJwk.LoadFile("qa_data/jwk/simple_jwk_rsa.json","utf-8")
if ($success -ne $true) {
    $("Failed to load simple JWK file.")
    exit
}

# Loading it into a Chilkat public key object is easy:
$pubkey = New-Object Chilkat.PublicKey
$success = $pubkey.LoadFromString($sbJwk.GetAsString())
if ($success -ne $true) {
    $($pubkey.LastErrorText)
    exit
}

$("Simple JWK loaded into public key object.")

# ----------------------------------------------------------------------------------------------------------
# Demonstrate how to load a JWK that is contained within JSON into a public key object.

# {
#   "alg":"RS256",
#   "jwk":  {
#           "kty":"RSA",
#           "kid":"bilbo.baggins@hobbiton.example",
#           "use":"sig",
#           "n":"26381066103266289976070039679240841999340706859156341823971393693544846472963839705790075117105560154606562987481050889935247188300178764426769543782451174831475924241862817098997865881169498995546309260357488285676768114714548754913374731868063116787903918383610614912211576698081222844057810710088656983077876282582286966085572172471849443305250452393766960762340311496052418952315081937000716222751229644449475751932222180738210988190709824209639002026650048655399108647971010890335494074025258268035713167380057822555485524738518699437692145859633592396626258745090144803752145540471688039673495588314804430463791",
#           "e":"65537"
#           }
# }

$sbJwk2 = New-Object Chilkat.StringBuilder
$success = $sbJwk2.LoadFile("qa_data/jwk/contained_jwk_rsa.json","utf-8")
if ($success -ne $true) {
    $("Failed to load JWK file.")
    exit
}

# Get the "jwk" part of the JSON..
$json = New-Object Chilkat.JsonObject
$json.Load($sbJwk2.GetAsString())

$jsonJwk = $json.ObjectOf("jwk")
if ($json.LastMethodSuccess -ne $true) {
    $("No jwk member exists.")
    exit
}

$pubkey2 = New-Object Chilkat.PublicKey
$success = $pubkey2.LoadFromString($jsonJwk.Emit())
if ($success -ne $true) {
    $($pubkey2.LastErrorText)
    exit
}

$("Contained JWK loaded into public key object.")