Visual FoxPro

ABN AMRO Create Signed JSON Web Token

See more ABN AMRO Examples

Demonstrates how to create a signed JWT to be used for authenticating requests to the ABN AMRO REST API's. Visual FoxPro

LOCAL lnSuccess
LOCAL loRsa
LOCAL loPrivkey
LOCAL loPubkey
LOCAL loJwt
LOCAL loJsonHeader
LOCAL loJsonPayload
LOCAL lnCurDateTime
LOCAL lcJwtStr

lnSuccess = 0

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

* Create public/private key pair (RSA)
loRsa = CreateObject('Chilkat.Rsa')

* Generate a 2048-bit key.
loPrivkey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loRsa.GenKey(2048,loPrivkey)
IF (lnSuccess = 0) THEN
    ? loRsa.LastErrorText
    RELEASE loRsa
    RELEASE loPrivkey
    CANCEL
ENDIF

* Export the key to PEM files.
* Write one PEM file for the private key, and one for the public key.
lnSuccess = loPrivkey.SavePemFile("qa_data/pem/abnAmroPrivateKey.pem")

loPubkey = CreateObject('Chilkat.PublicKey')
loPrivkey.ToPublicKey(loPubkey)
lnSuccess = loPubkey.SavePemFile(1,"qa_data/pem/abnAmroPublicKey.pem")
* Note: Please share your public key along with your app name and developer email id at api.support@nl.abnamro.com. 
* Token generation will not work unless public key is associated with your app.

* Create the JWT.
loJwt = CreateObject('Chilkat.Jwt')

* Create the header:
* {
*     "typ": "JWT",
*     "alg": "RS256"
* }
loJsonHeader = CreateObject('Chilkat.JsonObject')
loJsonHeader.UpdateString("typ","JWT")
loJsonHeader.UpdateString("alg","RS256")

* Create the payload:
* {
*     "nbf": 1499947668,
*     "exp": 1499948668,
*     "iss": "me",
*     "sub": "anApiKey",
*     "aud": "https://auth-sandbox.abnamro.com/oauth/token"
* }
loJsonPayload = CreateObject('Chilkat.JsonObject')

lnCurDateTime = loJwt.GenNumericDate(0)

* Set the "not process before" timestamp to now.
lnSuccess = loJsonPayload.AddIntAt(-1,"nbf",lnCurDateTime)

* Set the timestamp defining an expiration time (end time) for the token
* to be now + 1 hour (3600 seconds)
lnSuccess = loJsonPayload.AddIntAt(-1,"exp",lnCurDateTime + 3600)

loJsonPayload.UpdateString("iss","me")
loJsonPayload.UpdateString("sub","anApiKey")
loJsonPayload.UpdateString("aud","https://auth-sandbox.abnamro.com/oauth/token")

* Produce the smallest possible JWT:
loJwt.AutoCompact = 1

lcJwtStr = loJwt.CreateJwtPk(loJsonHeader.Emit(),loJsonPayload.Emit(),loPrivkey)
IF (loJwt.LastMethodSuccess = 0) THEN
    ? loJwt.LastErrorText
    RELEASE loRsa
    RELEASE loPrivkey
    RELEASE loPubkey
    RELEASE loJwt
    RELEASE loJsonHeader
    RELEASE loJsonPayload
    CANCEL
ENDIF

* Here is the JWT:
? lcJwtStr

RELEASE loRsa
RELEASE loPrivkey
RELEASE loPubkey
RELEASE loJwt
RELEASE loJsonHeader
RELEASE loJsonPayload