// cryptopasta - basic cryptography examples
//
// Written in 2016 by George Tankersley <george.tankersley@gmail.com>
//
// To the extent possible under law, the author(s) have dedicated all copyright
// and related and neighboring rights to this software to the public domain
// worldwide. This software is distributed without any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication along
// with this software. If not, see // <http://creativecommons.org/publicdomain/zero/1.0/>.

// Provides a recommended TLS configuration.
package cryptopasta

import "crypto/tls"

func DefaultTLSConfig() *tls.Config {
	return &tls.Config{
		// Avoids most of the memorably-named TLS attacks
		MinVersion: tls.VersionTLS12,
		// Causes servers to use Go's default ciphersuite preferences,
		// which are tuned to avoid attacks. Does nothing on clients.
		PreferServerCipherSuites: true,
		// Only use curves which have constant-time implementations
		CurvePreferences: []tls.CurveID{
			tls.CurveP256,
		},
	}
}