PowerBuilder

Create JWT using a Brainpool EC Key

See more JSON Web Token (JWT) Examples

Demonstrates how to create a JWT using an EC private key. This is for JOSE headers having an "alg" member with any of the following values:

• BP160R1
• BP192R1
• BP224R1
• BP256R1
• BP320R1
• BP384R1
• BP512R1

This example also demonstrates how to include time constraints:

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

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_PrivKey
oleobject loo_Jwt
oleobject loo_Jose
oleobject loo_Claims
integer li_CurDateTime
string ls_Token

li_Success = 0

// Demonstrates how to create a JWT using a brainpool EC private key.

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

loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat.PrivateKey")
if li_rc < 0 then
    destroy loo_PrivKey
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Load a brainpool EC key.
li_Success = loo_PrivKey.LoadPemFile("c:/qa_data/pem/ec_brainpool_privKey.pem")
if li_Success <> 1 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_PrivKey
    return
end if

// You can examine the curve name of the key you just loaded by getting the private in XML format:
// <ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>
Write-Debug loo_PrivKey.GetXml()

loo_Jwt = create oleobject
li_rc = loo_Jwt.ConnectToNewObject("Chilkat.Jwt")

// Build the JOSE header
loo_Jose = create oleobject
li_rc = loo_Jose.ConnectToNewObject("Chilkat.JsonObject")

// Use the brainpool curve name matching the private key you just loaded.
// Use "BP256R1", or "BP384R1", etc.   
li_Success = loo_Jose.AppendString("alg","BP256R1")
li_Success = loo_Jose.AppendString("typ","JWT")

// Now build the JWT claims (also known as the payload)
loo_Claims = create oleobject
li_rc = loo_Claims.ConnectToNewObject("Chilkat.JsonObject")

li_Success = loo_Claims.AppendString("iss","http://example.org")
li_Success = loo_Claims.AppendString("sub","John")
li_Success = loo_Claims.AppendString("aud","http://example.com")

// Set the timestamp of when the JWT was created to now.
li_CurDateTime = loo_Jwt.GenNumericDate(0)
li_Success = loo_Claims.AddIntAt(-1,"iat",li_CurDateTime)

// Set the "not process before" timestamp to now.
li_Success = loo_Claims.AddIntAt(-1,"nbf",li_CurDateTime)

// Set the timestamp defining an expiration time (end time) for the token
// to be now + 1 hour (3600 seconds)
li_Success = loo_Claims.AddIntAt(-1,"exp",li_CurDateTime + 3600)

// Produce the smallest possible JWT:
loo_Jwt.AutoCompact = 1

// Create the JWT token.  This is where the ECC signature is created.
ls_Token = loo_Jwt.CreateJwtPk(loo_Jose.Emit(),loo_Claims.Emit(),loo_PrivKey)

Write-Debug ls_Token


destroy loo_PrivKey
destroy loo_Jwt
destroy loo_Jose
destroy loo_Claims