Upgrade a Plain TCP Connection to TLS

See more Socket/SSL/TLS Examples

Demonstrates Socket.ConvertToSsl, which upgrades an already-connected plain TCP socket to TLS by performing a client-side TLS handshake over the existing connection.

Background. This supports STARTTLS-style upgrades, where a protocol begins in plaintext and switches to TLS at a defined point. Perform the protocol-specific negotiation first, then call ConvertToSsl.

Chilkat Go Downloads

Download Chilkat for Go

    success := false

    socket := chilkat.NewSocket()

    //  Connect as plain TCP (no TLS yet).
    bTls := false
    maxWaitMs := 5000
    success = socket.Connect("example.com",5000,bTls,maxWaitMs)
    if success == false {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    //  At the point where the application protocol permits a STARTTLS-style upgrade, perform any required
    //  negotiation, then upgrade the existing connection to TLS with a client-side handshake.
    success = socket.ConvertToSsl()
    if success == false {
        fmt.Println(socket.LastErrorText())
        socket.DisposeSocket()
        return
    }

    fmt.Println("Connection upgraded to TLS.")

    socket.DisposeSocket()