(PowerBuilder) Create JWT Using HS256, HS384, or HS512

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Jwt
oleobject loo_Jose
integer li_Success
oleobject loo_Claims
integer li_CurDateTime
string ls_StrJwt

// 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.

loo_Jwt = create oleobject
// Use "Chilkat_9_5_0.Jwt" for versions of Chilkat < 10.0.0
li_rc = loo_Jwt.ConnectToNewObject("Chilkat.Jwt")
if li_rc < 0 then
    destroy loo_Jwt
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// Build the JOSE header
loo_Jose = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Jose.ConnectToNewObject("Chilkat.JsonObject")

// Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
li_Success = loo_Jose.AppendString("alg","HS256")
li_Success = loo_Jose.AppendString("typ","JWT")

// Now build the JWT claims (also known as the payload)
loo_Claims = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
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

ls_StrJwt = loo_Jwt.CreateJwt(loo_Jose.Emit(),loo_Claims.Emit(),"secret")

Write-Debug ls_StrJwt


destroy loo_Jwt
destroy loo_Jose
destroy loo_Claims