(VB.NET UWP/WinRT) Okta Client Credentials FLow

The Client Credentials flow is recommended for use in machine-to-machine authentication. Your application will need to securely store its Client ID and Secret and pass those to Okta in exchange for an access token. At a high-level, the flow only has two steps:

• Your application passes its client credentials to your Okta authorization server.
• If the credentials are accurate, Okta responds with an access token.

Note: This example uses "customScope". You'll replace it with whatever scope(s) you've defined for your app. Scopes are defined in your Authorization Server. See Okta Authorization Server / Scopes

For more information, see https://developer.okta.com/docs/guides/implement-client-creds/use-flow/

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim http As New Chilkat.Http
Dim success As Boolean

' Implements the following CURL command:

' curl --request POST \
'   --url https://{yourOktaDomain}/oauth2/default/v1/token \
'   --header 'accept: application/json' \
'   --user "client_id:client_secret" \
'   --header 'cache-control: no-cache' \
'   --header 'content-type: application/x-www-form-urlencoded' \
'   --data 'grant_type=client_credentials&scope=customScope'

http.Login = "client_id"
http.Password = "client_secret"

Dim req As New Chilkat.HttpRequest
req.HttpVerb = "POST"
req.Path = "/oauth2/default/v1/token"
req.ContentType = "application/x-www-form-urlencoded"
req.AddParam("grant_type","client_credentials")
req.AddParam("scope","customScope")

req.AddHeader("accept","application/json")

Dim resp As Chilkat.HttpResponse = Await http.PostUrlEncodedAsync("https://{yourOktaDomain}/oauth2/default/v1/token",req)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim sbResponseBody As New Chilkat.StringBuilder
resp.GetBodySb(sbResponseBody)
Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Debug.WriteLine("Response Body:")
Debug.WriteLine(jResp.Emit())

Dim respStatusCode As Integer = resp.StatusCode
Debug.WriteLine("Response Status Code = " & respStatusCode)
If (respStatusCode >= 400) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(resp.Header)
    Debug.WriteLine("Failed.")

    Exit Sub
End If



' Sample JSON response:
' (Sample code for parsing the JSON response is shown below)

' {
'   "access_token": "eyJraWQiO ... B2CnCLj7GRUW3mQ",
'   "token_type": "Bearer",
'   "expires_in": 3600,
'   "scope": "customScope"
' }

' Sample code for parsing the JSON response...
' Use the following online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON


Dim access_token As String = jResp.StringOf("access_token")
Dim token_type As String = jResp.StringOf("token_type")
Dim expires_in As Integer = jResp.IntOf("expires_in")
Dim scope As String = jResp.StringOf("scope")