Support custom ACME provider (#18340)

* Added ACMECAURL option to support custom ACME provider. Closes #18306
* Refactor setting.go https settings, renamed options and variables, and documented app.example.ini
* Refactored runLetsEncrypt to runACME
* Improved documentation

1 files changed, 0 insertions, 99 deletions

diff --git a/cmd/web_letsencrypt.go b/cmd/web_letsencrypt.go
deleted file mode 100644
index 517d71f017..0000000000
--- a/cmd/web_letsencrypt.go
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2020 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 (
-	"net/http"
-	"strconv"
-	"strings"
-
-	"code.gitea.io/gitea/modules/graceful"
-	"code.gitea.io/gitea/modules/log"
-	"code.gitea.io/gitea/modules/setting"
-
-	"github.com/caddyserver/certmagic"
-)
-
-func runLetsEncrypt(listenAddr, domain, directory, email string, m http.Handler) error {
-	// If HTTP Challenge enabled, needs to be serving on port 80. For TLSALPN needs 443.
-	// Due to docker port mapping this can't be checked programmatically
-	// TODO: these are placeholders until we add options for each in settings with appropriate warning
-	enableHTTPChallenge := true
-	enableTLSALPNChallenge := true
-	altHTTPPort := 0
-	altTLSALPNPort := 0
-
-	if p, err := strconv.Atoi(setting.PortToRedirect); err == nil {
-		altHTTPPort = p
-	}
-	if p, err := strconv.Atoi(setting.HTTPPort); err == nil {
-		altTLSALPNPort = p
-	}
-
-	magic := certmagic.NewDefault()
-	magic.Storage = &certmagic.FileStorage{Path: directory}
-	myACME := certmagic.NewACMEManager(magic, certmagic.ACMEManager{
-		Email:                   email,
-		Agreed:                  setting.LetsEncryptTOS,
-		DisableHTTPChallenge:    !enableHTTPChallenge,
-		DisableTLSALPNChallenge: !enableTLSALPNChallenge,
-		ListenHost:              setting.HTTPAddr,
-		AltTLSALPNPort:          altTLSALPNPort,
-		AltHTTPPort:             altHTTPPort,
-	})
-
-	magic.Issuers = []certmagic.Issuer{myACME}
-
-	// this obtains certificates or renews them if necessary
-	err := magic.ManageSync(graceful.GetManager().HammerContext(), []string{domain})
-	if err != nil {
-		return err
-	}
-
-	tlsConfig := magic.TLSConfig()
-	tlsConfig.NextProtos = append(tlsConfig.NextProtos, "h2")
-
-	if version := toTLSVersion(setting.SSLMinimumVersion); version != 0 {
-		tlsConfig.MinVersion = version
-	}
-	if version := toTLSVersion(setting.SSLMaximumVersion); version != 0 {
-		tlsConfig.MaxVersion = version
-	}
-
-	// Set curve preferences
-	if curves := toCurvePreferences(setting.SSLCurvePreferences); len(curves) > 0 {
-		tlsConfig.CurvePreferences = curves
-	}
-
-	// Set cipher suites
-	if ciphers := toTLSCiphers(setting.SSLCipherSuites); len(ciphers) > 0 {
-		tlsConfig.CipherSuites = ciphers
-	}
-
-	if enableHTTPChallenge {
-		go func() {
-			log.Info("Running Let's Encrypt handler on %s", setting.HTTPAddr+":"+setting.PortToRedirect)
-			// all traffic coming into HTTP will be redirect to HTTPS automatically (LE HTTP-01 validation happens here)
-			err := runHTTP("tcp", setting.HTTPAddr+":"+setting.PortToRedirect, "Let's Encrypt HTTP Challenge", myACME.HTTPChallengeHandler(http.HandlerFunc(runLetsEncryptFallbackHandler)))
-			if err != nil {
-				log.Fatal("Failed to start the Let's Encrypt handler on port %s: %v", setting.PortToRedirect, err)
-			}
-		}()
-	}
-
-	return runHTTPSWithTLSConfig("tcp", listenAddr, "Web", tlsConfig, m)
-}
-
-func runLetsEncryptFallbackHandler(w http.ResponseWriter, r *http.Request) {
-	if r.Method != "GET" && r.Method != "HEAD" {
-		http.Error(w, "Use HTTPS", http.StatusBadRequest)
-		return
-	}
-	// Remove the trailing slash at the end of setting.AppURL, the request
-	// URI always contains a leading slash, which would result in a double
-	// slash
-	target := strings.TrimSuffix(setting.AppURL, "/") + r.URL.RequestURI()
-	http.Redirect(w, r, target, http.StatusFound)
-}