// Copyright 2021 The Gitea Authors. All rights reserved.// SPDX-License-Identifier: MIT 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, useProxyProtocol, proxyProtocolTLSBridging bool) 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, useProxyProtocol, proxyProtocolTLSBridging)} func runHTTPSWithTLSConfig(network, listenAddr, name string, tlsConfig *tls.Config, m http.Handler, useProxyProtocol, proxyProtocolTLSBridging bool) error {	return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, name, tlsConfig, m, useProxyProtocol, proxyProtocolTLSBridging)}