(Go) 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 Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // 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.

    jwt := chilkat.NewJwt()

    // Build the JOSE header
    jose := chilkat.NewJsonObject()
    // Use HS256.  Pass the string "HS384" or "HS512" to use a different algorithm.
    success := jose.AppendString("alg","HS256")
    success = jose.AppendString("typ","JWT")

    // Now build the JWT claims (also known as the payload)
    claims := chilkat.NewJsonObject()
    success = claims.AppendString("iss","http://example.org")
    success = claims.AppendString("sub","John")
    success = claims.AppendString("aud","http://example.com")

    // Set the timestamp of when the JWT was created to now.
    curDateTime := jwt.GenNumericDate(0)
    success = claims.AddIntAt(-1,"iat",curDateTime)

    // Set the "not process before" timestamp to now.
    success = claims.AddIntAt(-1,"nbf",curDateTime)

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

    // Produce the smallest possible JWT:
    jwt.SetAutoCompact(true)

    strJwt := jwt.CreateJwt(*jose.Emit(),*claims.Emit(),"secret")

    fmt.Println(*strJwt)

    jwt.DisposeJwt()
    jose.DisposeJsonObject()
    claims.DisposeJsonObject()