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// Copyright 2021 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package cmd
import (
"crypto/tls"
"net/http"
"os"
"strings"
"code.gitea.io/gitea/modules/graceful"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"github.com/klauspost/cpuid/v2"
)
var tlsVersionStringMap = map[string]uint16{
"": tls.VersionTLS12, // Default to tls.VersionTLS12
"tlsv1.0": tls.VersionTLS10,
"tlsv1.1": tls.VersionTLS11,
"tlsv1.2": tls.VersionTLS12,
"tlsv1.3": tls.VersionTLS13,
}
func toTLSVersion(version string) uint16 {
tlsVersion, ok := tlsVersionStringMap[strings.TrimSpace(strings.ToLower(version))]
if !ok {
log.Warn("Unknown tls version: %s", version)
return 0
}
return tlsVersion
}
var curveStringMap = map[string]tls.CurveID{
"x25519": tls.X25519,
"p256": tls.CurveP256,
"p384": tls.CurveP384,
"p521": tls.CurveP521,
}
func toCurvePreferences(preferences []string) []tls.CurveID {
ids := make([]tls.CurveID, 0, len(preferences))
for _, pref := range preferences {
id, ok := curveStringMap[strings.TrimSpace(strings.ToLower(pref))]
if !ok {
log.Warn("Unknown curve: %s", pref)
}
if id != 0 {
ids = append(ids, id)
}
}
return ids
}
var cipherStringMap = map[string]uint16{
"rsa_with_rc4_128_sha": tls.TLS_RSA_WITH_RC4_128_SHA,
"rsa_with_3des_ede_cbc_sha": tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
"rsa_with_aes_128_cbc_sha": tls.TLS_RSA_WITH_AES_128_CBC_SHA,
"rsa_with_aes_256_cbc_sha": tls.TLS_RSA_WITH_AES_256_CBC_SHA,
"rsa_with_aes_128_cbc_sha256": tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
"rsa_with_aes_128_gcm_sha256": tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
"rsa_with_aes_256_gcm_sha384": tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
"ecdhe_ecdsa_with_rc4_128_sha": tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
"ecdhe_ecdsa_with_aes_128_cbc_sha": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
"ecdhe_ecdsa_with_aes_256_cbc_sha": tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
"ecdhe_rsa_with_rc4_128_sha": tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
"ecdhe_rsa_with_3des_ede_cbc_sha": tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
"ecdhe_rsa_with_aes_128_cbc_sha": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
"ecdhe_rsa_with_aes_256_cbc_sha": tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
"ecdhe_ecdsa_with_aes_128_cbc_sha256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
"ecdhe_rsa_with_aes_128_cbc_sha256": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
"ecdhe_rsa_with_aes_128_gcm_sha256": tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
"ecdhe_ecdsa_with_aes_128_gcm_sha256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
"ecdhe_rsa_with_aes_256_gcm_sha384": tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
"ecdhe_ecdsa_with_aes_256_gcm_sha384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
"ecdhe_rsa_with_chacha20_poly1305_sha256": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
"ecdhe_ecdsa_with_chacha20_poly1305_sha256": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
"ecdhe_rsa_with_chacha20_poly1305": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
"ecdhe_ecdsa_with_chacha20_poly1305": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
"aes_128_gcm_sha256": tls.TLS_AES_128_GCM_SHA256,
"aes_256_gcm_sha384": tls.TLS_AES_256_GCM_SHA384,
"chacha20_poly1305_sha256": tls.TLS_CHACHA20_POLY1305_SHA256,
}
func toTLSCiphers(cipherStrings []string) []uint16 {
ciphers := make([]uint16, 0, len(cipherStrings))
for _, cipherString := range cipherStrings {
cipher, ok := cipherStringMap[strings.TrimSpace(strings.ToLower(cipherString))]
if !ok {
log.Warn("Unknown cipher: %s", cipherString)
}
if cipher != 0 {
ciphers = append(ciphers, cipher)
}
}
return ciphers
}
// defaultCiphers uses hardware support to check if AES is specifically
// supported by the CPU.
//
// If AES is supported AES ciphers will be preferred over ChaCha based ciphers
// (This code is directly inspired by the certmagic code.)
func defaultCiphers() []uint16 {
if cpuid.CPU.Supports(cpuid.AESNI) {
return defaultCiphersAESfirst
}
return defaultCiphersChaChaFirst
}
var (
defaultCiphersAES = []uint16{
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
}
defaultCiphersChaCha = []uint16{
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
}
defaultCiphersAESfirst = append(defaultCiphersAES, defaultCiphersChaCha...)
defaultCiphersChaChaFirst = append(defaultCiphersChaCha, defaultCiphersAES...)
)
// runHTTPs listens on the provided network address and then calls
// Serve to handle requests on incoming TLS connections.
//
// Filenames containing a certificate and matching private key for the server must
// be provided. If the certificate is signed by a certificate authority, the
// certFile should be the concatenation of the server's certificate followed by the
// CA's certificate.
func runHTTPS(network, listenAddr, name, certFile, keyFile string, m http.Handler) error {
tlsConfig := &tls.Config{}
if tlsConfig.NextProtos == nil {
tlsConfig.NextProtos = []string{"h2", "http/1.1"}
}
if version := toTLSVersion(setting.SSLMinimumVersion); version != 0 {
tlsConfig.MinVersion = version
}
if version := toTLSVersion(setting.SSLMaximumVersion); version != 0 {
tlsConfig.MaxVersion = version
}
// Set curve preferences
tlsConfig.CurvePreferences = []tls.CurveID{
tls.X25519,
tls.CurveP256,
}
if curves := toCurvePreferences(setting.SSLCurvePreferences); len(curves) > 0 {
tlsConfig.CurvePreferences = curves
}
// Set cipher suites
tlsConfig.CipherSuites = defaultCiphers()
if ciphers := toTLSCiphers(setting.SSLCipherSuites); len(ciphers) > 0 {
tlsConfig.CipherSuites = ciphers
}
tlsConfig.Certificates = make([]tls.Certificate, 1)
certPEMBlock, err := os.ReadFile(certFile)
if err != nil {
log.Error("Failed to load https cert file %s for %s:%s: %v", certFile, network, listenAddr, err)
return err
}
keyPEMBlock, err := os.ReadFile(keyFile)
if err != nil {
log.Error("Failed to load https key file %s for %s:%s: %v", keyFile, network, listenAddr, err)
return err
}
tlsConfig.Certificates[0], err = tls.X509KeyPair(certPEMBlock, keyPEMBlock)
if err != nil {
log.Error("Failed to create certificate from cert file %s and key file %s for %s:%s: %v", certFile, keyFile, network, listenAddr, err)
return err
}
return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, name, tlsConfig, m)
}
func runHTTPSWithTLSConfig(network, listenAddr, name string, tlsConfig *tls.Config, m http.Handler) error {
return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, name, tlsConfig, m)
}
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