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(AutoIt) 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:
; This example assumes the Chilkat API to have been previously unlocked. ; See Global Unlock Sample for sample code. $oHttp = ObjCreate("Chilkat_9_5_0.Http") $oSbPubKeys = ObjCreate("Chilkat_9_5_0.StringBuilder") Local $bSuccess = $oHttp.QuickGetSb("https://www.googleapis.com/oauth2/v3/certs",$oSbPubKeys) If ($bSuccess = False) Then ConsoleWrite($oHttp.LastErrorText & @CRLF) Exit EndIf ConsoleWrite($oSbPubKeys.GetAsString() & @CRLF) ; 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. ; ------------------------------------------------------------------------------------------- Local $sToken = "eyJhbGciOiJSUzI1NiIsImtpZCI6IjQyZmY5MGQ3ZDM0OGM5NzM4MWE3YzExOWVmMWY1MzI0ZWEzZjViZWIifQ.eyJpc3MiOiJodHRwczovL2FjY291bnRzLmdvb2dsZS5jb20iLCJzdWIiOiIxMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExMTExIiwiaWF0IjoxNjExMTE1MTQzLCJleHAiOjE2MTEyMDE1NDMsImF1ZCI6IjQyOTc1NzExNTE0ODg0OSJ9.pLem5i0bx3M7lJYj7jKv2Nq7c07X5YpZz-x1uM5RniW-v4LsX-lKIVvOq2x3-WoPqkzLXJfP0kG0dx1uD2q1NfFQK60YwKH4FnFtB6INnUP1dRVpP9_pTTKyAE28I3s5Tay4PbPdrCl7ZLCIJzCfpCW1TiWeVoPjp5HgZKTBHdP_sEkN_yO5dQerQXAkFJkV3kNgF9jI3ayT-KPqOIH6GVoWXjHFDyA2EYgJPEFRo5WSe6XycJ85p5duwT-OoBcb_kJZG9PxYd91eHlPCzp8vGxzIb2dVROCBxyM8e8W0cd9v15hfmpg9R-eG9vCM5y63ZLChZLFeHFx0Pd7hvAqfKg" $oJwt = ObjCreate("Chilkat_9_5_0.Jwt") Local $sHeader = $oJwt.GetHeader($sToken) ConsoleWrite($sHeader & @CRLF) ; Sample header: ; {"alg":"RS256","kid":"87bbe0815b064e6d449cac999f0e50e72a3e4374"} ; Load the public key matching the "kid" into a Chilkat public key object, then verify.. $oJson = ObjCreate("Chilkat_9_5_0.JsonObject") $oJson.Load($sHeader) Local $sKid = $oJson.StringOf("kid") ConsoleWrite("kid = " & $sKid & @CRLF) $oJsonPubKeys = ObjCreate("Chilkat_9_5_0.JsonObject") $oJsonPubKeys.LoadSb($oSbPubKeys) Local $oJsonKey = $oJsonPubKeys.FindRecord("keys","kid",$sKid,True) If ($oJsonPubKeys.LastMethodSuccess = False) Then ConsoleWrite("Did not find a matching public key based on the kid." & @CRLF) Exit EndIf ConsoleWrite($oJsonKey.Emit() & @CRLF) ; Load the matching public key into a Chilkat public key object. $oPubKey = ObjCreate("Chilkat_9_5_0.PublicKey") $bSuccess = $oPubKey.LoadFromString($oJsonKey.Emit()) If ($bSuccess = False) Then ConsoleWrite($oPubKey.LastErrorText & @CRLF) Exit EndIf ; ---------------------------------------------------------------------------------------- ; 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 |
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