(Go) 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

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // 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.

    privKey := chilkat.NewPrivateKey()

    // Load a brainpool EC key.
    success := privKey.LoadPemFile("c:/qa_data/pem/ec_brainpool_privKey.pem")
    if success != true {
        fmt.Println(privKey.LastErrorText())
        privKey.DisposePrivateKey()
        return
    }

    // You can examine the curve name of the key you just loaded by getting the private in XML format:
    // <ECCKeyValue curve="CURVE_NAME">...</ECCKeyValue>
    fmt.Println(*privKey.GetXml())

    jwt := chilkat.NewJwt()

    // Build the JOSE header
    jose := chilkat.NewJsonObject()
    // Use the brainpool curve name matching the private key you just loaded.
    // Use "BP256R1", or "BP384R1", etc.   
    success = jose.AppendString("alg","BP256R1")
    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)

    // Create the JWT token.  This is where the ECC signature is created.
    token := jwt.CreateJwtPk(*jose.Emit(),*claims.Emit(),privKey)

    fmt.Println(*token)

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