(DataFlex) Retrieve the Okta JSON Web Keys (JWK)

Demonstrates how to get the Okta web keys (JWK) that will be needed to locally validate an access token. This example is for the case where Okta is the identity platform for your App or API. (See https://developer.okta.com/docs/reference/api/oidc/#composing-your-base-url)

Note: This example uses the URL

https://dev-765951.okta.com/oauth2/${authServerId}/v1/authorize

If you have a developer account, you can use the default authorization server that was created along with your account, in which case the full URL looks like this:

https://dev-765951.okta.com/oauth2/default/v1/authorize

Also: You'll need to change "dev-765951" to use your own Okta domain.

For more information, see https://developer.okta.com/docs/reference/api/oidc/#keys

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoHttp
    Boolean iSuccess
    Variant vSbResponseBody
    Handle hoSbResponseBody
    Handle hoJResp
    Integer iRespStatusCode
    String sKty
    String sAlg
    String sKid
    String sUse
    String e
    String n
    Integer i
    Integer iCount_i
    String sTemp1

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

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    // Implements the following CURL command:

    // curl -X GET \
    // https://dev-765951.okta.com/oauth2/${authServerId}/v1/keys?client_id=$my_client_id

    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbResponseBody
    If (Not(IsComObjectCreated(hoSbResponseBody))) Begin
        Send CreateComObject of hoSbResponseBody
    End
    Get pvComObject of hoSbResponseBody to vSbResponseBody
    Get ComQuickGetSb Of hoHttp "https://dev-765951.okta.com/oauth2/${authServerId}/v1/keys?client_id=$my_client_id" vSbResponseBody To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJResp
    If (Not(IsComObjectCreated(hoJResp))) Begin
        Send CreateComObject of hoJResp
    End
    Get pvComObject of hoSbResponseBody to vSbResponseBody
    Get ComLoadSb Of hoJResp vSbResponseBody To iSuccess
    Set ComEmitCompact Of hoJResp To False

    Showln "Response Body:"
    Get ComEmit Of hoJResp To sTemp1
    Showln sTemp1

    Get ComLastStatus Of hoHttp To iRespStatusCode
    Showln "Response Status Code = " iRespStatusCode
    If (iRespStatusCode >= 400) Begin
        Showln "Response Header:"
        Get ComLastHeader Of hoHttp To sTemp1
        Showln sTemp1
        Showln "Failed."
        Procedure_Return
    End

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

    // {
    //   "keys": [
    //     {
    //       "kty": "RSA",
    //       "alg": "RS256",
    //       "kid": "anSaRDPfWGOSCVNZEIZB9quCbNsdsvl5uWGBzxbudWQ",
    //       "use": "sig",
    //       "e": "AQAB",
    //       "n": "jT8uAgd5wF7d3aiCjdxbVXk7EDio2ScqAjWCL2LXbY3bpj6RV4dswZTqBg0-vuIh1SBqjoufDV3fHAJcewv2dfEdfUKawBxTIcLgeSu_NoUsZ6zmHqYKC9U0awgP3s5_Yqcr7YMxurrPRNRdKNsFFF2lhCDJ-4gCO4CWiCUdptlmMfI7_pBxx9bgh1F-ulVKt_RUo-4A7tXwwJhBhWaECKoye04BACccSNkth8flGSvjXNIVKcAMHYQ3oDfB6U5zXcFuDVEBJI__hzA9920QRXrloIv_G0QmYgbaf4iRpd-3B6-PQ4-VK-FGm3t9eTwoFv6CARpyXrjaOeuLB1HaVw"
    //     }
    //   ]
    // }

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

    Move 0 To i
    Get ComSizeOfArray Of hoJResp "keys" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJResp To i
        Get ComStringOf Of hoJResp "keys[i].kty" To sKty
        Get ComStringOf Of hoJResp "keys[i].alg" To sAlg
        Get ComStringOf Of hoJResp "keys[i].kid" To sKid
        Get ComStringOf Of hoJResp "keys[i].use" To sUse
        Get ComStringOf Of hoJResp "keys[i].e" To e
        Get ComStringOf Of hoJResp "keys[i].n" To n
        Move (i + 1) To i
    Loop



End_Procedure