mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-27 14:13:48 +03:00
673 lines
19 KiB
Go
673 lines
19 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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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 httpcaddyfile
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import (
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"encoding/base64"
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"encoding/pem"
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"fmt"
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"html"
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"io/ioutil"
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"net/http"
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"reflect"
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"strings"
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"github.com/caddyserver/caddy/v2"
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"github.com/caddyserver/caddy/v2/caddyconfig"
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"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
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"github.com/caddyserver/caddy/v2/modules/caddyhttp"
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"github.com/caddyserver/caddy/v2/modules/caddytls"
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"github.com/caddyserver/certmagic"
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"github.com/mholt/acmez/acme"
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"go.uber.org/zap/zapcore"
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)
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func init() {
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RegisterDirective("bind", parseBind)
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RegisterDirective("tls", parseTLS)
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RegisterHandlerDirective("root", parseRoot)
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RegisterHandlerDirective("redir", parseRedir)
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RegisterHandlerDirective("respond", parseRespond)
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RegisterHandlerDirective("route", parseRoute)
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RegisterHandlerDirective("handle", parseHandle)
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RegisterDirective("handle_errors", parseHandleErrors)
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RegisterDirective("log", parseLog)
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}
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// parseBind parses the bind directive. Syntax:
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//
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// bind <addresses...>
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//
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func parseBind(h Helper) ([]ConfigValue, error) {
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var lnHosts []string
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for h.Next() {
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lnHosts = append(lnHosts, h.RemainingArgs()...)
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}
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return h.NewBindAddresses(lnHosts), nil
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}
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// parseTLS parses the tls directive. Syntax:
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//
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// tls [<email>|internal]|[<cert_file> <key_file>] {
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// protocols <min> [<max>]
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// ciphers <cipher_suites...>
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// curves <curves...>
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// client_auth {
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// mode [request|require|verify_if_given|require_and_verify]
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// trusted_ca_cert <base64_der>
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// trusted_ca_cert_file <filename>
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// trusted_leaf_cert <base64_der>
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// trusted_leaf_cert_file <filename>
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// }
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// alpn <values...>
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// load <paths...>
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// ca <acme_ca_endpoint>
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// ca_root <pem_file>
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// dns <provider_name>
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// on_demand
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// eab <key_id> <mac_key>
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// issuer <module_name> ...
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// }
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//
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func parseTLS(h Helper) ([]ConfigValue, error) {
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cp := new(caddytls.ConnectionPolicy)
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var fileLoader caddytls.FileLoader
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var folderLoader caddytls.FolderLoader
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var certSelector caddytls.CustomCertSelectionPolicy
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var acmeIssuer *caddytls.ACMEIssuer
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var internalIssuer *caddytls.InternalIssuer
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var issuer certmagic.Issuer
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var onDemand bool
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for h.Next() {
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// file certificate loader
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firstLine := h.RemainingArgs()
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switch len(firstLine) {
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case 0:
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case 1:
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if firstLine[0] == "internal" {
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internalIssuer = new(caddytls.InternalIssuer)
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} else if !strings.Contains(firstLine[0], "@") {
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return nil, h.Err("single argument must either be 'internal' or an email address")
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} else {
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if acmeIssuer == nil {
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acmeIssuer = new(caddytls.ACMEIssuer)
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}
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acmeIssuer.Email = firstLine[0]
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}
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case 2:
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certFilename := firstLine[0]
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keyFilename := firstLine[1]
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// tag this certificate so if multiple certs match, specifically
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// this one that the user has provided will be used, see #2588:
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// https://github.com/caddyserver/caddy/issues/2588 ... but we
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// must be careful about how we do this; being careless will
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// lead to failed handshakes
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//
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// we need to remember which cert files we've seen, since we
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// must load each cert only once; otherwise, they each get a
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// different tag... since a cert loaded twice has the same
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// bytes, it will overwrite the first one in the cache, and
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// only the last cert (and its tag) will survive, so a any conn
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// policy that is looking for any tag but the last one to be
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// loaded won't find it, and TLS handshakes will fail (see end)
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// of issue #3004)
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//
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// tlsCertTags maps certificate filenames to their tag.
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// This is used to remember which tag is used for each
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// certificate files, since we need to avoid loading
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// the same certificate files more than once, overwriting
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// previous tags
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tlsCertTags, ok := h.State["tlsCertTags"].(map[string]string)
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if !ok {
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tlsCertTags = make(map[string]string)
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h.State["tlsCertTags"] = tlsCertTags
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}
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tag, ok := tlsCertTags[certFilename]
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if !ok {
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// haven't seen this cert file yet, let's give it a tag
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// and add a loader for it
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tag = fmt.Sprintf("cert%d", len(tlsCertTags))
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fileLoader = append(fileLoader, caddytls.CertKeyFilePair{
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Certificate: certFilename,
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Key: keyFilename,
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Tags: []string{tag},
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})
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// remember this for next time we see this cert file
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tlsCertTags[certFilename] = tag
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}
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certSelector.AnyTag = append(certSelector.AnyTag, tag)
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default:
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return nil, h.ArgErr()
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}
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var hasBlock bool
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for nesting := h.Nesting(); h.NextBlock(nesting); {
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hasBlock = true
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switch h.Val() {
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case "protocols":
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args := h.RemainingArgs()
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if len(args) == 0 {
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return nil, h.SyntaxErr("one or two protocols")
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}
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if len(args) > 0 {
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if _, ok := caddytls.SupportedProtocols[args[0]]; !ok {
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return nil, h.Errf("Wrong protocol name or protocol not supported: '%s'", args[0])
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}
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cp.ProtocolMin = args[0]
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}
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if len(args) > 1 {
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if _, ok := caddytls.SupportedProtocols[args[1]]; !ok {
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return nil, h.Errf("Wrong protocol name or protocol not supported: '%s'", args[1])
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}
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cp.ProtocolMax = args[1]
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}
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case "ciphers":
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for h.NextArg() {
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if !caddytls.CipherSuiteNameSupported(h.Val()) {
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return nil, h.Errf("Wrong cipher suite name or cipher suite not supported: '%s'", h.Val())
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}
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cp.CipherSuites = append(cp.CipherSuites, h.Val())
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}
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case "curves":
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for h.NextArg() {
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if _, ok := caddytls.SupportedCurves[h.Val()]; !ok {
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return nil, h.Errf("Wrong curve name or curve not supported: '%s'", h.Val())
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}
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cp.Curves = append(cp.Curves, h.Val())
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}
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case "client_auth":
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cp.ClientAuthentication = &caddytls.ClientAuthentication{}
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for nesting := h.Nesting(); h.NextBlock(nesting); {
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subdir := h.Val()
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switch subdir {
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case "mode":
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if !h.Args(&cp.ClientAuthentication.Mode) {
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return nil, h.ArgErr()
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}
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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case "trusted_ca_cert",
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"trusted_leaf_cert":
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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if subdir == "trusted_ca_cert" {
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cp.ClientAuthentication.TrustedCACerts = append(cp.ClientAuthentication.TrustedCACerts, h.Val())
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} else {
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cp.ClientAuthentication.TrustedLeafCerts = append(cp.ClientAuthentication.TrustedLeafCerts, h.Val())
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}
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case "trusted_ca_cert_file",
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"trusted_leaf_cert_file":
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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filename := h.Val()
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certDataPEM, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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block, _ := pem.Decode(certDataPEM)
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if block == nil || block.Type != "CERTIFICATE" {
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return nil, h.Errf("no CERTIFICATE pem block found in %s", h.Val())
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}
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if subdir == "trusted_ca_cert_file" {
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cp.ClientAuthentication.TrustedCACerts = append(cp.ClientAuthentication.TrustedCACerts,
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base64.StdEncoding.EncodeToString(block.Bytes))
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} else {
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cp.ClientAuthentication.TrustedLeafCerts = append(cp.ClientAuthentication.TrustedLeafCerts,
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base64.StdEncoding.EncodeToString(block.Bytes))
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}
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default:
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return nil, h.Errf("unknown subdirective for client_auth: %s", subdir)
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}
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}
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case "alpn":
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args := h.RemainingArgs()
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if len(args) == 0 {
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return nil, h.ArgErr()
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}
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cp.ALPN = args
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case "load":
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folderLoader = append(folderLoader, h.RemainingArgs()...)
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case "ca":
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arg := h.RemainingArgs()
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if len(arg) != 1 {
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return nil, h.ArgErr()
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}
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if acmeIssuer == nil {
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acmeIssuer = new(caddytls.ACMEIssuer)
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}
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acmeIssuer.CA = arg[0]
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case "eab":
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arg := h.RemainingArgs()
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if len(arg) != 2 {
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return nil, h.ArgErr()
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}
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if acmeIssuer == nil {
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acmeIssuer = new(caddytls.ACMEIssuer)
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}
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acmeIssuer.ExternalAccount = &acme.EAB{
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KeyID: arg[0],
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MACKey: arg[1],
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}
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case "issuer":
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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modName := h.Val()
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mod, err := caddy.GetModule("tls.issuance." + modName)
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if err != nil {
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return nil, h.Errf("getting issuer module '%s': %v", modName, err)
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}
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unm, ok := mod.New().(caddyfile.Unmarshaler)
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if !ok {
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return nil, h.Errf("issuer module '%s' is not a Caddyfile unmarshaler", mod.ID)
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}
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err = unm.UnmarshalCaddyfile(h.NewFromNextSegment())
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if err != nil {
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return nil, err
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}
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issuer, ok = unm.(certmagic.Issuer)
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if !ok {
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return nil, h.Errf("module %s is not a certmagic.Issuer", mod.ID)
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}
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case "dns":
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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provName := h.Val()
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if acmeIssuer == nil {
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acmeIssuer = new(caddytls.ACMEIssuer)
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}
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if acmeIssuer.Challenges == nil {
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acmeIssuer.Challenges = new(caddytls.ChallengesConfig)
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acmeIssuer.Challenges.DNS = new(caddytls.DNSChallengeConfig)
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}
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dnsProvModule, err := caddy.GetModule("dns.providers." + provName)
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if err != nil {
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return nil, h.Errf("getting DNS provider module named '%s': %v", provName, err)
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}
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dnsProvModuleInstance := dnsProvModule.New()
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if unm, ok := dnsProvModuleInstance.(caddyfile.Unmarshaler); ok {
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err = unm.UnmarshalCaddyfile(h.NewFromNextSegment())
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if err != nil {
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return nil, err
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}
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}
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acmeIssuer.Challenges.DNS.ProviderRaw = caddyconfig.JSONModuleObject(dnsProvModuleInstance, "name", provName, h.warnings)
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case "ca_root":
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arg := h.RemainingArgs()
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if len(arg) != 1 {
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return nil, h.ArgErr()
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}
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if acmeIssuer == nil {
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acmeIssuer = new(caddytls.ACMEIssuer)
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}
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acmeIssuer.TrustedRootsPEMFiles = append(acmeIssuer.TrustedRootsPEMFiles, arg[0])
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case "on_demand":
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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onDemand = true
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default:
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return nil, h.Errf("unknown subdirective: %s", h.Val())
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}
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}
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// a naked tls directive is not allowed
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if len(firstLine) == 0 && !hasBlock {
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return nil, h.ArgErr()
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}
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}
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// begin building the final config values
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var configVals []ConfigValue
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// certificate loaders
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if len(fileLoader) > 0 {
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configVals = append(configVals, ConfigValue{
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Class: "tls.cert_loader",
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Value: fileLoader,
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})
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}
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if len(folderLoader) > 0 {
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configVals = append(configVals, ConfigValue{
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Class: "tls.cert_loader",
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Value: folderLoader,
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})
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}
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// issuer
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if acmeIssuer != nil && internalIssuer != nil {
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// the logic to support this would be complex
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return nil, h.Err("cannot use both ACME and internal issuers in same server block")
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}
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if issuer != nil && (acmeIssuer != nil || internalIssuer != nil) {
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// similarly, the logic to support this would be complex
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return nil, h.Err("when defining an issuer, all its config must be in its block, rather than from separate tls subdirectives")
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}
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switch {
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case issuer != nil:
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configVals = append(configVals, ConfigValue{
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Class: "tls.cert_issuer",
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Value: issuer,
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})
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case internalIssuer != nil:
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configVals = append(configVals, ConfigValue{
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Class: "tls.cert_issuer",
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Value: internalIssuer,
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})
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case acmeIssuer != nil:
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// fill in global defaults, if configured
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if email := h.Option("email"); email != nil && acmeIssuer.Email == "" {
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acmeIssuer.Email = email.(string)
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}
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if acmeCA := h.Option("acme_ca"); acmeCA != nil && acmeIssuer.CA == "" {
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acmeIssuer.CA = acmeCA.(string)
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}
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if caPemFile := h.Option("acme_ca_root"); caPemFile != nil {
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acmeIssuer.TrustedRootsPEMFiles = append(acmeIssuer.TrustedRootsPEMFiles, caPemFile.(string))
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}
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configVals = append(configVals, ConfigValue{
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Class: "tls.cert_issuer",
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Value: disambiguateACMEIssuer(acmeIssuer),
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})
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}
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// on-demand TLS
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if onDemand {
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configVals = append(configVals, ConfigValue{
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Class: "tls.on_demand",
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Value: true,
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})
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}
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// custom certificate selection
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if len(certSelector.AnyTag) > 0 {
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cp.CertSelection = &certSelector
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}
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// connection policy -- always add one, to ensure that TLS
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// is enabled, because this directive was used (this is
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// needed, for instance, when a site block has a key of
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// just ":5000" - i.e. no hostname, and only on-demand TLS
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// is enabled)
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configVals = append(configVals, ConfigValue{
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Class: "tls.connection_policy",
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Value: cp,
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})
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return configVals, nil
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}
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// parseRoot parses the root directive. Syntax:
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//
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// root [<matcher>] <path>
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//
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func parseRoot(h Helper) (caddyhttp.MiddlewareHandler, error) {
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var root string
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for h.Next() {
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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root = h.Val()
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if h.NextArg() {
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return nil, h.ArgErr()
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}
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}
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return caddyhttp.VarsMiddleware{"root": root}, nil
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}
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// parseRedir parses the redir directive. Syntax:
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//
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// redir [<matcher>] <to> [<code>]
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//
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func parseRedir(h Helper) (caddyhttp.MiddlewareHandler, error) {
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if !h.Next() {
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return nil, h.ArgErr()
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}
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if !h.NextArg() {
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return nil, h.ArgErr()
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}
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to := h.Val()
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var code string
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if h.NextArg() {
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code = h.Val()
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}
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if code == "permanent" {
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code = "301"
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}
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if code == "temporary" || code == "" {
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code = "302"
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}
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var body string
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if code == "html" {
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// Script tag comes first since that will better imitate a redirect in the browser's
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// history, but the meta tag is a fallback for most non-JS clients.
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const metaRedir = `<!DOCTYPE html>
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<html>
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<head>
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<title>Redirecting...</title>
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<script>window.location.replace("%s");</script>
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<meta http-equiv="refresh" content="0; URL='%s'">
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</head>
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<body>Redirecting to <a href="%s">%s</a>...</body>
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</html>
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`
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safeTo := html.EscapeString(to)
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body = fmt.Sprintf(metaRedir, safeTo, safeTo, safeTo, safeTo)
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}
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return caddyhttp.StaticResponse{
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StatusCode: caddyhttp.WeakString(code),
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Headers: http.Header{"Location": []string{to}},
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Body: body,
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}, nil
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}
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|
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// parseRespond parses the respond directive.
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func parseRespond(h Helper) (caddyhttp.MiddlewareHandler, error) {
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sr := new(caddyhttp.StaticResponse)
|
|
err := sr.UnmarshalCaddyfile(h.Dispenser)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return sr, nil
|
|
}
|
|
|
|
// parseRoute parses the route directive.
|
|
func parseRoute(h Helper) (caddyhttp.MiddlewareHandler, error) {
|
|
sr := new(caddyhttp.Subroute)
|
|
|
|
allResults, err := parseSegmentAsConfig(h)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
for _, result := range allResults {
|
|
switch handler := result.Value.(type) {
|
|
case caddyhttp.Route:
|
|
sr.Routes = append(sr.Routes, handler)
|
|
case caddyhttp.Subroute:
|
|
// directives which return a literal subroute instead of a route
|
|
// means they intend to keep those handlers together without
|
|
// them being reordered; we're doing that anyway since we're in
|
|
// the route directive, so just append its handlers
|
|
sr.Routes = append(sr.Routes, handler.Routes...)
|
|
default:
|
|
return nil, h.Errf("%s directive returned something other than an HTTP route or subroute: %#v (only handler directives can be used in routes)", result.directive, result.Value)
|
|
}
|
|
}
|
|
|
|
return sr, nil
|
|
}
|
|
|
|
func parseHandle(h Helper) (caddyhttp.MiddlewareHandler, error) {
|
|
return ParseSegmentAsSubroute(h)
|
|
}
|
|
|
|
func parseHandleErrors(h Helper) ([]ConfigValue, error) {
|
|
subroute, err := ParseSegmentAsSubroute(h)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return []ConfigValue{
|
|
{
|
|
Class: "error_route",
|
|
Value: subroute,
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
// parseLog parses the log directive. Syntax:
|
|
//
|
|
// log {
|
|
// output <writer_module> ...
|
|
// format <encoder_module> ...
|
|
// level <level>
|
|
// }
|
|
//
|
|
func parseLog(h Helper) ([]ConfigValue, error) {
|
|
var configValues []ConfigValue
|
|
for h.Next() {
|
|
// log does not currently support any arguments
|
|
if h.NextArg() {
|
|
return nil, h.ArgErr()
|
|
}
|
|
|
|
cl := new(caddy.CustomLog)
|
|
|
|
for h.NextBlock(0) {
|
|
switch h.Val() {
|
|
case "output":
|
|
if !h.NextArg() {
|
|
return nil, h.ArgErr()
|
|
}
|
|
moduleName := h.Val()
|
|
|
|
// can't use the usual caddyfile.Unmarshaler flow with the
|
|
// standard writers because they are in the caddy package
|
|
// (because they are the default) and implementing that
|
|
// interface there would unfortunately create circular import
|
|
var wo caddy.WriterOpener
|
|
switch moduleName {
|
|
case "stdout":
|
|
wo = caddy.StdoutWriter{}
|
|
case "stderr":
|
|
wo = caddy.StderrWriter{}
|
|
case "discard":
|
|
wo = caddy.DiscardWriter{}
|
|
default:
|
|
mod, err := caddy.GetModule("caddy.logging.writers." + moduleName)
|
|
if err != nil {
|
|
return nil, h.Errf("getting log writer module named '%s': %v", moduleName, err)
|
|
}
|
|
unm, ok := mod.New().(caddyfile.Unmarshaler)
|
|
if !ok {
|
|
return nil, h.Errf("log writer module '%s' is not a Caddyfile unmarshaler", mod)
|
|
}
|
|
err = unm.UnmarshalCaddyfile(h.NewFromNextSegment())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
wo, ok = unm.(caddy.WriterOpener)
|
|
if !ok {
|
|
return nil, h.Errf("module %s is not a WriterOpener", mod)
|
|
}
|
|
}
|
|
cl.WriterRaw = caddyconfig.JSONModuleObject(wo, "output", moduleName, h.warnings)
|
|
|
|
case "format":
|
|
if !h.NextArg() {
|
|
return nil, h.ArgErr()
|
|
}
|
|
moduleName := h.Val()
|
|
mod, err := caddy.GetModule("caddy.logging.encoders." + moduleName)
|
|
if err != nil {
|
|
return nil, h.Errf("getting log encoder module named '%s': %v", moduleName, err)
|
|
}
|
|
unm, ok := mod.New().(caddyfile.Unmarshaler)
|
|
if !ok {
|
|
return nil, h.Errf("log encoder module '%s' is not a Caddyfile unmarshaler", mod)
|
|
}
|
|
err = unm.UnmarshalCaddyfile(h.NewFromNextSegment())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
enc, ok := unm.(zapcore.Encoder)
|
|
if !ok {
|
|
return nil, h.Errf("module %s is not a zapcore.Encoder", mod)
|
|
}
|
|
cl.EncoderRaw = caddyconfig.JSONModuleObject(enc, "format", moduleName, h.warnings)
|
|
|
|
case "level":
|
|
if !h.NextArg() {
|
|
return nil, h.ArgErr()
|
|
}
|
|
cl.Level = h.Val()
|
|
if h.NextArg() {
|
|
return nil, h.ArgErr()
|
|
}
|
|
|
|
default:
|
|
return nil, h.Errf("unrecognized subdirective: %s", h.Val())
|
|
}
|
|
}
|
|
|
|
var val namedCustomLog
|
|
if !reflect.DeepEqual(cl, new(caddy.CustomLog)) {
|
|
logCounter, ok := h.State["logCounter"].(int)
|
|
if !ok {
|
|
logCounter = 0
|
|
}
|
|
val.name = fmt.Sprintf("log%d", logCounter)
|
|
cl.Include = []string{"http.log.access." + val.name}
|
|
val.log = cl
|
|
logCounter++
|
|
h.State["logCounter"] = logCounter
|
|
}
|
|
configValues = append(configValues, ConfigValue{
|
|
Class: "custom_log",
|
|
Value: val,
|
|
})
|
|
}
|
|
return configValues, nil
|
|
}
|