Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(VBScript) Verify a Google JWT Using Google's Public KeySee more Google APIs ExamplesDemonstrates how to verify a JWT that was signed using Google's RSA private key. This example verifies the RSA signature. It also does the following:
Dim fso, outFile Set fso = CreateObject("Scripting.FileSystemObject") 'Create a Unicode (utf-16) output text file. Set outFile = fso.CreateTextFile("output.txt", True, True) ' This example assumes the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. set http = CreateObject("Chilkat_9_5_0.Http") set sbPubKeys = CreateObject("Chilkat_9_5_0.StringBuilder") success = http.QuickGetSb("https://www.googleapis.com/oauth2/v3/certs",sbPubKeys) If (success = 0) Then outFile.WriteLine(http.LastErrorText) WScript.Quit End If outFile.WriteLine(sbPubKeys.GetAsString()) ' Here are the keys: ' { ' "keys": [ ' { ' "e": "AQAB", ' "n": "4bAT6C6EeX8Dspje3FrAXw-nnhNk04e1RmNa4kjc0CHf6Pk7ryARlwA-6YilyPABqQfYHx60s8oSnxvUVprFfQ2-Q8aAZO7bPKSxnoGlcKERL2oLNA4Msvc89N9Y5ycThZUplf_QC19e6jyYXN6Nz-UnJSCLrtQY8tVhhVRs61j4A2N_p-enAi-r704Qi1-v-DKV4eVRkClKViploo8NyjUaT9L4vbBssPCjyimJzsWnEe1fED5c4LnHeArYzA_FEn3JJotqDIz9t2VnvZNTMhizHEX4VnORlEWMEfR8n4CEHQx7PcQUOmfqyw08gWeXQl1-uTjtIGaE-sRIv9u_vQ", ' "kty": "RSA", ' "use": "sig", ' "alg": "RS256", ' "kid": "2af90e87be140c20038898a6efa11283dab6031d" ' }, ' { ' "n": "nzGsrziOYrMVYMpvUZOwkKNiPWcOPTYRYlDSdRW4UpAHdWPbPlyqaaphYhoMB5DXrVxI3bdvm7DOlo-sHNnulmAFQa-7TsQMxrZCvVdAbyXGID9DZYEqf8mkCV1Ohv7WY5lDUqlybIk1OSHdK7-1et0QS8nn-5LojGg8FK4ssLf3mV1APpujl27D1bDhyRb1MGumXYElwlUms7F9p9OcSp5pTevXCLmXs9MJJk4o9E1zzPpQ9Ko0lH9l_UqFpA7vwQhnw0nbh73rXOX2TUDCUqL4ThKU5Z9Pd-eZCEOatKe0mJTpQ00XGACBME_6ojCdfNIJr84Y_IpGKvkAEksn9w", ' "use": "sig", ' "kid": "87bbe0815b064e6d449cac999f0e50e72a3e4374", ' "e": "AQAB", ' "alg": "RS256", ' "kty": "RSA" ' } ' ] ' } ' ------------------------------------------------------------------------------------------- ' Replace this with your actual token. ' This sample token contains a kid that does not match any of the above Google public keys. ' ------------------------------------------------------------------------------------------- token = "eyJhbGciOiJSUzI1NiIsImtpZCI6IjQyZmY5MGQ3ZDM0OGM5NzM4MWE3YzExOWVmMWY1MzI0ZWEzZjViZWIifQ.eyJpc3MiOiJodHRwczovL2FjY291bnRzLmdvb2dsZS5jb20iLCJzdWIiOiIxMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExIiwiaWF0IjoxNjExMTE1MTQzLCJleHAiOjE2MTEyMDE1NDMsImF1ZCI6IjQyOTc1NzExNTE0ODg0OSJ9.pLem5i0bx3M7lJYj7jKv2Nq7c07X5YpZz-x1uM5RniW-v4LsX-lKIVvOq2x3-WoPqkzLXJfP0kG0dx1uD2q1NfFQK60YwKH4FnFtB6INnUP1dRVpP9_pTTKyAE28I3s5Tay4PbPdrCl7ZLCIJzCfpCW1TiWeVoPjp5HgZKTBHdP_sEkN_yO5dQerQXAkFJkV3kNgF9jI3ayT-KPqOIH6GVoWXjHFDyA2EYgJPEFRo5WSe6XycJ85p5duwT-OoBcb_kJZG9PxYd91eHlPCzp8vGxzIb2dVROCBxyM8e8W0cd9v15hfmpg9R-eG9vCM5y63ZLChZLFeHFx0Pd7hvAqfKg" set jwt = CreateObject("Chilkat_9_5_0.Jwt") header = jwt.GetHeader(token) outFile.WriteLine(header) ' Sample header: ' {"alg":"RS256","kid":"87bbe0815b064e6d449cac999f0e50e72a3e4374"} ' Load the public key matching the "kid" into a Chilkat public key object, then verify.. set json = CreateObject("Chilkat_9_5_0.JsonObject") success = json.Load(header) kid = json.StringOf("kid") outFile.WriteLine("kid = " & kid) set jsonPubKeys = CreateObject("Chilkat_9_5_0.JsonObject") success = jsonPubKeys.LoadSb(sbPubKeys) ' jsonKey is a Chilkat_9_5_0.JsonObject Set jsonKey = jsonPubKeys.FindRecord("keys","kid",kid,1) If (jsonPubKeys.LastMethodSuccess = 0) Then outFile.WriteLine("Did not find a matching public key based on the kid.") WScript.Quit End If outFile.WriteLine(jsonKey.Emit()) ' Load the matching public key into a Chilkat public key object. set pubKey = CreateObject("Chilkat_9_5_0.PublicKey") success = pubKey.LoadFromString(jsonKey.Emit()) If (success = 0) Then outFile.WriteLine(pubKey.LastErrorText) WScript.Quit End If ' ---------------------------------------------------------------------------------------- ' Now we can validate the JWT using Google's public key as shown in this example: ' (Except we use the public key obtained as shown above instead of a public key loaded from a PEM file. ' ' See Verify JWT Using an RSA Public Key outFile.Close |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.