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Create JWT Using HS256, HS384, or HS512

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using HS256, HS384, or HS512. (HS256 is JWT's acronym for HMAC-SHA256.) When HMAC is used, the secret is a shared secret (i.e. password) that both client and server know beforehand.

This example also demonstrates how to include time constraints:

• nbf: Not Before Time
• exp: Expiration Time
• iat: Issue At Time

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Local $bSuccess = False

; Demonstrates how to create an HMAC JWT using a shared secret (password).

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

$oJwt = ObjCreate("Chilkat.Jwt")

; Build the JOSE header
$oJose = ObjCreate("Chilkat.JsonObject")
; Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
$bSuccess = $oJose.AppendString("alg","HS256")
$bSuccess = $oJose.AppendString("typ","JWT")

; Now build the JWT claims (also known as the payload)
$oClaims = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oClaims.AppendString("iss","http://example.org")
$bSuccess = $oClaims.AppendString("sub","John")
$bSuccess = $oClaims.AppendString("aud","http://example.com")

; Set the timestamp of when the JWT was created to now.
Local $iCurDateTime = $oJwt.GenNumericDate(0)
$bSuccess = $oClaims.AddIntAt(-1,"iat",$iCurDateTime)

; Set the "not process before" timestamp to now.
$bSuccess = $oClaims.AddIntAt(-1,"nbf",$iCurDateTime)

; Set the timestamp defining an expiration time (end time) for the token
; to be now + 1 hour (3600 seconds)
$bSuccess = $oClaims.AddIntAt(-1,"exp",$iCurDateTime + 3600)

; Produce the smallest possible JWT:
$oJwt.AutoCompact = True

Local $strJwt = $oJwt.CreateJwt($oJose.Emit(),$oClaims.Emit(),"secret")

ConsoleWrite($strJwt & @CRLF)