How to modify TLS config

Q/A
#1

Hey all,

does anyone know what the best way would be to implement personal configurations for TLS? As far as I’ve understood, the TLS configs are taken from Go’s “crypto/tls” library correct? Or is there a specific TLS config file that I’m missing? Any help would be highly appreciated.

#2

Hello,
You can implement custom TLS configurations in Go using the crypto/tls package.
Here’s a basic example that you can adjust based on your needs:

import "crypto/tls"

func getCustomTLSConfig() *tls.Config {
    return &tls.Config{
        // Set minimum TLS version (TLS 1.2 recommended)
        MinVersion: tls.VersionTLS12,
        
        // Customize cipher suites
        CipherSuites: []uint16{
            tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
            tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
        },
        
        // Load certificates and private keys
        // Make sure these files exist in the correct path
        Certificates: []tls.Certificate{
            mustLoadCert("path/to/cert.pem", "path/to/key.pem"),
        },
        
        // Optional settings
        PreferServerCipherSuites: true,
    }
}

func mustLoadCert(certFile, keyFile string) tls.Certificate {
    cert, err := tls.LoadX509KeyPair(certFile, keyFile)
    if err != nil {
        log.Fatal(err)
    }
    return cert
}

// Use in HTTP server
server := &http.Server{
    Addr:      ":443",
    TLSConfig: getCustomTLSConfig(),
}

Besides, You’re correct - TLS configurations are taken from Go’s crypto/tls library, and you don’t need a separate config file. However, you will need:

  1. SSL certificate files (.pem/.crt)
  2. Private key files (.pem/.key)
    Let me know if you need more detailed configuration options!