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* pki: Initial commit of embedded ACME server (#3021) * reverseproxy: Support auto-managed TLS client certificates (#3021) * A little cleanup after today's review session
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| // Copyright 2015 Matthew Holt and The Caddy Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package acmeserver | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| "time" | ||
|
|
||
| "github.com/caddyserver/caddy/v2" | ||
| "github.com/caddyserver/caddy/v2/modules/caddyhttp" | ||
| "github.com/caddyserver/caddy/v2/modules/caddypki" | ||
| "github.com/go-chi/chi" | ||
| "github.com/smallstep/certificates/acme" | ||
| acmeAPI "github.com/smallstep/certificates/acme/api" | ||
| "github.com/smallstep/certificates/authority" | ||
| "github.com/smallstep/certificates/authority/provisioner" | ||
| "github.com/smallstep/certificates/db" | ||
| "github.com/smallstep/nosql" | ||
| ) | ||
|
|
||
| func init() { | ||
| caddy.RegisterModule(Handler{}) | ||
| } | ||
|
|
||
| // Handler is an ACME server handler. | ||
| type Handler struct { | ||
| // The ID of the CA to use for signing. This refers to | ||
| // the ID given to the CA in the `pki` app. If omitted, | ||
| // the default ID is "local". | ||
| CA string `json:"ca,omitempty"` | ||
|
|
||
| // The hostname or IP address by which ACME clients | ||
| // will access the server. This is used to populate | ||
| // the ACME directory endpoint. Default: localhost. | ||
| // TODO: this is probably not needed - check with smallstep | ||
| Host string `json:"host,omitempty"` | ||
|
|
||
| // The path prefix under which to serve all ACME | ||
| // endpoints. All other requests will not be served | ||
| // by this handler and will be passed through to | ||
| // the next one. Default: "/acme/" | ||
| PathPrefix string `json:"path_prefix,omitempty"` | ||
|
|
||
| acmeEndpoints http.Handler | ||
| } | ||
|
|
||
| // CaddyModule returns the Caddy module information. | ||
| func (Handler) CaddyModule() caddy.ModuleInfo { | ||
| return caddy.ModuleInfo{ | ||
| ID: "http.handlers.acme_server", | ||
| New: func() caddy.Module { return new(Handler) }, | ||
| } | ||
| } | ||
|
|
||
| // Provision sets up the ACME server handler. | ||
| func (ash *Handler) Provision(ctx caddy.Context) error { | ||
| // set some defaults | ||
| if ash.CA == "" { | ||
| ash.CA = caddypki.DefaultCAID | ||
| } | ||
| if ash.Host == "" { | ||
| ash.Host = defaultHost | ||
| } | ||
| if ash.PathPrefix == "" { | ||
| ash.PathPrefix = defaultPathPrefix | ||
| } | ||
|
|
||
| // get a reference to the configured CA | ||
| appModule, err := ctx.App("pki") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| pkiApp := appModule.(*caddypki.PKI) | ||
| ca, ok := pkiApp.CAs[ash.CA] | ||
| if !ok { | ||
| return fmt.Errorf("no certificate authority configured with id: %s", ash.CA) | ||
| } | ||
|
|
||
| dbFolder := filepath.Join(caddy.AppDataDir(), "acme_server", "db") | ||
|
|
||
| // TODO: See https://github.com/smallstep/nosql/issues/7 | ||
| err = os.MkdirAll(dbFolder, 0755) | ||
| if err != nil { | ||
| return fmt.Errorf("making folder for ACME server database: %v", err) | ||
| } | ||
|
|
||
| authorityConfig := caddypki.AuthorityConfig{ | ||
| AuthConfig: &authority.AuthConfig{ | ||
| Provisioners: provisioner.List{ | ||
| &provisioner.ACME{ | ||
| Name: ash.CA, | ||
| Type: provisioner.TypeACME.String(), | ||
| Claims: &provisioner.Claims{ | ||
| MinTLSDur: &provisioner.Duration{Duration: 5 * time.Minute}, | ||
| MaxTLSDur: &provisioner.Duration{Duration: 24 * time.Hour * 365}, | ||
| DefaultTLSDur: &provisioner.Duration{Duration: 12 * time.Hour}, | ||
| }, | ||
| }, | ||
| }, | ||
| }, | ||
| DB: &db.Config{ | ||
| Type: "badger", | ||
| DataSource: dbFolder, | ||
| }, | ||
| } | ||
|
|
||
| auth, err := ca.NewAuthority(authorityConfig) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| acmeAuth, err := acme.NewAuthority( | ||
| auth.GetDatabase().(nosql.DB), // stores all the server state | ||
| ash.Host, // used for directory links; TODO: not needed | ||
| strings.Trim(ash.PathPrefix, "/"), // used for directory links | ||
| auth) // configures the signing authority | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| // create the router for the ACME endpoints | ||
| acmeRouterHandler := acmeAPI.New(acmeAuth) | ||
| r := chi.NewRouter() | ||
| r.Route(ash.PathPrefix, func(r chi.Router) { | ||
| acmeRouterHandler.Route(r) | ||
| }) | ||
| ash.acmeEndpoints = r | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (ash Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error { | ||
| if strings.HasPrefix(r.URL.Path, ash.PathPrefix) { | ||
| ash.acmeEndpoints.ServeHTTP(w, r) | ||
| return nil | ||
| } | ||
| return next.ServeHTTP(w, r) | ||
| } | ||
|
|
||
| const ( | ||
| defaultHost = "localhost" | ||
| defaultPathPrefix = "/acme/" | ||
| ) | ||
|
|
||
| // Interface guards | ||
| var ( | ||
| _ caddyhttp.MiddlewareHandler = (*Handler)(nil) | ||
| _ caddy.Provisioner = (*Handler)(nil) | ||
| ) |
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