vkosuri
commented
1 year ago I have placed an example here as well, It's breaking change, Instead breaking one adding new property something like CipherSuiteString will improve.
// For example I don't write entire list supported ciphers into config rather I just use keywords and symbol to produce entire list, For example I took this example form
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
w.Header().Add("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
w.Write([]byte("This is an example server.\n"))
})
cfg := &tls.Config{
MinVersion: tls.VersionTLS12,
CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256},
PreferServerCipherSuites: true,
CipherSuites: []uint16{
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_RSA_WITH_AES_256_CBC_SHA,
},
}
srv := &http.Server{
Addr: ":443",
Handler: mux,
TLSConfig: cfg,
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0),
}
log.Fatal(srv.ListenAndServeTLS("tls.crt", "tls.key"))
}
// and just rewritten list this
func main() {
mux := http.NewServeMux()
mux.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
w.Header().Add("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
w.Write([]byte("This is an example server.\n"))
})
cfg := &tls.Config{
MinVersion: tls.VersionTLS12,
CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256},
PreferServerCipherSuites: true,
CipherSuiteString: []string{
'RSA+ECHDE'
},
}
srv := &http.Server{
Addr: ":443",
Handler: mux,
TLSConfig: cfg,
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0),
}
log.Fatal(srv.ListenAndServeTLS("tls.crt", "tls.key"))
}
ianlancetaylor
FiloSottile
Currently openssl ciphers https://www.openssl.org/docs/man1.1.1/man1/ciphers.html does support all keyword based such as DEFAULT, ALL, NULL and symbols '+' and '-' to get
Currently the API returns only https://pkg.go.dev/crypto/tls#CipherSuiteName CipherSuites returns string based on input constants https://pkg.go.dev/crypto/tls#pkg-constants instead if we have support for all Keywords and symbols accept strings and reruns array of strings.
This how openssl return the cipher suites based on keywords