B4X

Okta Client Credentials FLow

See more Okta OAuth/OIDC Examples

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

B4X

Dim success As Boolean = False

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

Dim http As ChilkatHttp
http.Initialize("http")

'  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 ChilkatHttpRequest
req.Initialize
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 ChilkatHttpResponse
resp.Initialize
success = http.HttpReq("https://{yourOktaDomain}/oauth2/default/v1/token", req, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim sbResponseBody As ChilkatStringBuilder
sbResponseBody.Initialize
resp.GetBodySb(sbResponseBody)
Dim jResp As ChilkatJsonObject
jResp.Initialize
jResp.LoadSb(sbResponseBody)
jResp.EmitCompact = False

Log("Response Body:")
Log(jResp.Emit)

Dim respStatusCode As Int = resp.StatusCode
Log("Response Status Code = " & respStatusCode)
If respStatusCode >= 400 Then
    Log("Response Header:")
    Log(resp.Header)
    Log("Failed.")
    Return
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 Int = jResp.IntOf("expires_in")
Dim scope As String = jResp.StringOf("scope")