mirror of
https://github.com/caddyserver/caddy.git
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37c852c382
Should only be used when many sites are defined in the Caddyfile, and you would run up against Let's Encrypt rate limits without a wildcard.
214 lines
7.1 KiB
Go
214 lines
7.1 KiB
Go
// Copyright 2015 Light Code Labs, LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package httpserver
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import (
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"fmt"
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"net"
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"net/http"
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"github.com/mholt/caddy"
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"github.com/mholt/caddy/caddytls"
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)
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func activateHTTPS(cctx caddy.Context) error {
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operatorPresent := !caddy.Started()
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if !caddy.Quiet && operatorPresent {
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fmt.Print("Activating privacy features... ")
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}
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ctx := cctx.(*httpContext)
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// pre-screen each config and earmark the ones that qualify for managed TLS
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markQualifiedForAutoHTTPS(ctx.siteConfigs)
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// place certificates and keys on disk
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for _, c := range ctx.siteConfigs {
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if c.TLS.OnDemand {
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continue // obtain these certificates on-demand instead
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}
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err := c.TLS.ObtainCert(c.TLS.Hostname, operatorPresent)
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if err != nil {
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return err
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}
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}
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// update TLS configurations
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err := enableAutoHTTPS(ctx.siteConfigs, true)
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if err != nil {
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return err
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}
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// set up redirects
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ctx.siteConfigs = makePlaintextRedirects(ctx.siteConfigs)
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// renew all relevant certificates that need renewal. this is important
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// to do right away so we guarantee that renewals aren't missed, and
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// also the user can respond to any potential errors that occur.
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// (skip if upgrading, because the parent process is likely already listening
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// on the ports we'd need to do ACME before we finish starting; parent process
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// already running renewal ticker, so renewal won't be missed anyway.)
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if !caddy.IsUpgrade() {
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err = caddytls.RenewManagedCertificates(true)
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if err != nil {
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return err
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}
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}
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if !caddy.Quiet && operatorPresent {
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fmt.Println("done.")
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}
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return nil
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}
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// markQualifiedForAutoHTTPS scans each config and, if it
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// qualifies for managed TLS, it sets the Managed field of
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// the TLS config to true.
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func markQualifiedForAutoHTTPS(configs []*SiteConfig) {
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for _, cfg := range configs {
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if caddytls.QualifiesForManagedTLS(cfg) && cfg.Addr.Scheme != "http" {
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cfg.TLS.Managed = true
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}
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}
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}
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// enableAutoHTTPS configures each config to use TLS according to default settings.
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// It will only change configs that are marked as managed but not on-demand, and
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// assumes that certificates and keys are already on disk. If loadCertificates is
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// true, the certificates will be loaded from disk into the cache for this process
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// to use. If false, TLS will still be enabled and configured with default settings,
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// but no certificates will be parsed loaded into the cache, and the returned error
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// value will always be nil.
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func enableAutoHTTPS(configs []*SiteConfig, loadCertificates bool) error {
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for _, cfg := range configs {
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if cfg == nil || cfg.TLS == nil || !cfg.TLS.Managed || cfg.TLS.OnDemand {
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continue
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}
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cfg.TLS.Enabled = true
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cfg.Addr.Scheme = "https"
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if loadCertificates && caddytls.HostQualifies(cfg.TLS.Hostname) {
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_, err := cfg.TLS.CacheManagedCertificate(cfg.TLS.Hostname)
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if err != nil {
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return err
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}
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}
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// Make sure any config values not explicitly set are set to default
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caddytls.SetDefaultTLSParams(cfg.TLS)
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// Set default port of 443 if not explicitly set
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if cfg.Addr.Port == "" &&
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cfg.TLS.Enabled &&
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(!cfg.TLS.Manual || cfg.TLS.OnDemand) &&
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cfg.Addr.Host != "localhost" {
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cfg.Addr.Port = HTTPSPort
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}
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}
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return nil
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}
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// makePlaintextRedirects sets up redirects from port 80 to the relevant HTTPS
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// hosts. You must pass in all configs, not just configs that qualify, since
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// we must know whether the same host already exists on port 80, and those would
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// not be in a list of configs that qualify for automatic HTTPS. This function will
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// only set up redirects for configs that qualify. It returns the updated list of
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// all configs.
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func makePlaintextRedirects(allConfigs []*SiteConfig) []*SiteConfig {
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for i, cfg := range allConfigs {
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if cfg.TLS.Managed &&
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!hostHasOtherPort(allConfigs, i, HTTPPort) &&
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(cfg.Addr.Port == HTTPSPort || !hostHasOtherPort(allConfigs, i, HTTPSPort)) {
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allConfigs = append(allConfigs, redirPlaintextHost(cfg))
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}
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}
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return allConfigs
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}
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// hostHasOtherPort returns true if there is another config in the list with the same
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// hostname that has port otherPort, or false otherwise. All the configs are checked
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// against the hostname of allConfigs[thisConfigIdx].
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func hostHasOtherPort(allConfigs []*SiteConfig, thisConfigIdx int, otherPort string) bool {
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for i, otherCfg := range allConfigs {
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if i == thisConfigIdx {
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continue // has to be a config OTHER than the one we're comparing against
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}
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if otherCfg.Addr.Host == allConfigs[thisConfigIdx].Addr.Host &&
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otherCfg.Addr.Port == otherPort {
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return true
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}
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}
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return false
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}
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// redirPlaintextHost returns a new plaintext HTTP configuration for
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// a virtualHost that simply redirects to cfg, which is assumed to
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// be the HTTPS configuration. The returned configuration is set
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// to listen on HTTPPort. The TLS field of cfg must not be nil.
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func redirPlaintextHost(cfg *SiteConfig) *SiteConfig {
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redirPort := cfg.Addr.Port
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if redirPort == HTTPSPort {
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// By default, HTTPSPort should be DefaultHTTPSPort,
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// which of course doesn't need to be explicitly stated
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// in the Location header. Even if HTTPSPort is changed
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// so that it is no longer DefaultHTTPSPort, we shouldn't
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// append it to the URL in the Location because changing
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// the HTTPS port is assumed to be an internal-only change
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// (in other words, we assume port forwarding is going on);
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// but redirects go back to a presumably-external client.
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// (If redirect clients are also internal, that is more
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// advanced, and the user should configure HTTP->HTTPS
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// redirects themselves.)
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redirPort = ""
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}
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redirMiddleware := func(next Handler) Handler {
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return HandlerFunc(func(w http.ResponseWriter, r *http.Request) (int, error) {
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// Construct the URL to which to redirect. Note that the Host in a
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// request might contain a port, but we just need the hostname from
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// it; and we'll set the port if needed.
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toURL := "https://"
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requestHost, _, err := net.SplitHostPort(r.Host)
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if err != nil {
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requestHost = r.Host // Host did not contain a port, so use the whole value
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}
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if redirPort == "" {
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toURL += requestHost
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} else {
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toURL += net.JoinHostPort(requestHost, redirPort)
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}
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toURL += r.URL.RequestURI()
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w.Header().Set("Connection", "close")
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http.Redirect(w, r, toURL, http.StatusMovedPermanently)
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return 0, nil
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})
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}
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host := cfg.Addr.Host
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port := HTTPPort
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addr := net.JoinHostPort(host, port)
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return &SiteConfig{
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Addr: Address{Original: addr, Host: host, Port: port},
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ListenHost: cfg.ListenHost,
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middleware: []Middleware{redirMiddleware},
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TLS: &caddytls.Config{AltHTTPPort: cfg.TLS.AltHTTPPort, AltTLSSNIPort: cfg.TLS.AltTLSSNIPort},
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Timeouts: cfg.Timeouts,
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}
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}
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