Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

VB.NET UWP/WinRT Web API Examples

Primary Categories

ABN AMRO
AWS Secrets Manager
AWS Translate
Activix CRM
Adyen
Alibaba Cloud OSS
Amazon Cognito
Amazon DynamoDB
Amazon MWS
Amazon Pay
Amazon Rekognition
Amazon Voice ID
Aruba Fatturazione
Azure Maps
Azure Monitor
Azure OAuth2
Azure Storage Accounts
Backblaze S3
Bitfinex v2 REST
Bluzone
BrickLink
CallRail
CardConnect
Cerved
ClickBank
Clickatell
Cloudfare
Constant Contact
DocuSign
Duo Auth MFA
ETrade
Ecwid
Egypt ITIDA
Etsy
Facebook
Faire
Frame.io
GeoOp
GetHarvest
Global Payments
Google People
Google Search Console
Hungary NAV Invoicing
IBM Text to Speech
Ibanity
IntakeQ
Jira
Lightspeed
MYOB
Magento
Mailgun
Mastercard

MedTunnel
MercadoLibre
Microsoft Calendar
Microsoft Group
Microsoft Tasks and Plans
Microsoft Teams
Moody's
Okta OAuth/OIDC
OneLogin OIDC
OneNote
PRODA
PayPal
Paynow.pl
Peoplevox
Populi
QuickBooks
Rabobank
Refinitiv
Royal Mail OBA
SCiS Schools Catalogue
SII Chile
SMSAPI
SOAP finkok.com
SendGrid
Shippo
Shopify
Shopware
Shopware 6
SimpleTexting
Square
Stripe
SugarCRM
TicketBAI
Trello
Twilio
Twitter
UniPin
VoiceBase
Vonage
Walmart
Walmart v3
Wasabi
WhatsApp
WiX
WooCommerce
WordPress
Xero
Yahoo Mail
Yousign
Zoom
_Miscellaneous_
eBay
effectconnect
hacienda.go.cr

 

 

 

(VB.NET UWP/WinRT) Docusign JSON Web Token (JWT) Grant

Demonstrates how to obtain an access token using the JSON Web Token (JWT) Grant. This is good for service integrations where authorization and authentication is automated and cannot have interactive Docusign account owner interaction. Consent for the access is obtained beforehand in various ways. See Obtaining Consent.

For more information, see https://developers.docusign.com/esign-rest-api/guides/authentication/oauth2-jsonwebtoken

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

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

' 1. Assume we have already requested and obtained application consent.
'    (See Request Docusign Application Consent
' 
' 2. Create a JWT Token.
' 
Dim privKey As New Chilkat.PrivateKey

' Load an RSA private key from a PEM file.
Dim success As Boolean = privKey.LoadPemFile("qa_data/pem/docusign_private_rsa_key.pem")
If (success <> True) Then
    Debug.WriteLine(privKey.LastErrorText)
    Exit Sub
End If


Dim jwt As New Chilkat.Jwt

' Build the JOSE header
Dim jose As New Chilkat.JsonObject
' Use RS256.  Pass the string "RS384" or "RS512" to use RSA with SHA-384 or SHA-512.
success = jose.AppendString("alg","RS256")
success = jose.AppendString("typ","JWT")

' Now build the JWT claims (also known as the payload)
Dim claims As New Chilkat.JsonObject

' Replace these with actual values.
' The client ID is also known as the "integration key" in Docusign.
success = claims.AppendString("iss","MY_DOCUSIGN_CLIENT_ID")
' In your DocuSign Admin/Account/UserProfile, this is the API Username, such as 14612117-2530-4982-8c49-ba8766303272
success = claims.AppendString("sub","DOCUSIGN_USER_ID")
success = claims.AppendString("aud","account-d.docusign.com")
success = claims.AppendString("scope","signature")

' Set the timestamp of when the JWT was created to now.
Dim curDateTime As Integer = jwt.GenNumericDate(0)
success = claims.AddIntAt(-1,"iat",curDateTime)

' Set the "not process before" timestamp to now.
success = claims.AddIntAt(-1,"nbf",curDateTime)

' Set the timestamp defining an expiration time (end time) for the token
' to be now + 1 hour (3600 seconds)
success = claims.AddIntAt(-1,"exp",curDateTime + 3600)

' Produce the smallest possible JWT:
jwt.AutoCompact = True

' Create the JWT token.  This is where the RSA signature is created.
Dim token As String = jwt.CreateJwtPk(jose.Emit(),claims.Emit(),privKey)

Debug.WriteLine(token)

' Do the following CURL statement to get the response JSON which contains the access token.
' curl --data "grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=YOUR_JSON_WEB_TOKEN" 
'      --request POST https://account-d.docusign.com/oauth/token
Dim http As New Chilkat.Http

Dim req As New Chilkat.HttpRequest
req.AddParam("grant_type","urn:ietf:params:oauth:grant-type:jwt-bearer")
req.AddParam("assertion",token)

Dim resp As Chilkat.HttpResponse = Await http.PostUrlEncodedAsync("https://account-d.docusign.com/oauth/token",req)
If (http.LastMethodSuccess = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("response status = " & resp.StatusCode)
If (resp.StatusCode <> 200) Then
    Debug.WriteLine(resp.BodyStr)
    Debug.WriteLine("Failed.")
Else
    ' Save the access token to a file for use in subsequent requests..
    ' (Or you may simply persiste the access token in memory for your applicaton to use for subsequent REST API calls..)
    success = resp.SaveBodyText(True,"qa_data/tokens/docusign.json")
    Debug.WriteLine(resp.BodyStr)
    Debug.WriteLine("Success.")
End If




 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.