AdGuardHome/internal/aghtls/aghtls.go

// Package aghtls contains utilities for work with TLS.
package aghtls

import "crypto/tls"

// SaferCipherSuites returns a set of default cipher suites with vulnerable and
// weak cipher suites removed.
func SaferCipherSuites() (safe []uint16) {
	suites := tls.CipherSuites()
	for _, s := range suites {
		switch s.ID {
		case
			tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
			tls.TLS_RSA_WITH_AES_128_CBC_SHA,
			tls.TLS_RSA_WITH_AES_256_CBC_SHA,
			tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
			tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
			tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
			tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
			tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
			tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
			tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
			tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:
			// Less safe 3DES and CBC suites, go on.
		default:
			safe = append(safe, s.ID)
		}
	}

	return safe
}