1 files changed, 0 insertions, 358 deletions
diff --git a/server/web.go b/server/web.go
deleted file mode 100644
index 9114de1..0000000
--- a/server/web.go
+++ /dev/null
@@ -1,358 +0,0 @@
-package server
-
-import (
-	"bytes"
-	"crypto/rand"
-	"encoding/base64"
-	"encoding/hex"
-	"encoding/json"
-	"fmt"
-	"html/template"
-	"io"
-	"log"
-	"net"
-	"net/http"
-	"os"
-	"strconv"
-	"strings"
-
-	"github.com/gobuffalo/packr"
-
-	"github.com/pkg/errors"
-	"github.com/prometheus/client_golang/prometheus/promhttp"
-
-	"golang.org/x/oauth2"
-
-	"github.com/gorilla/csrf"
-	"github.com/gorilla/handlers"
-	"github.com/gorilla/mux"
-	"github.com/gorilla/sessions"
-	"github.com/nsheridan/cashier/lib"
-	"github.com/nsheridan/cashier/server/config"
-	"github.com/nsheridan/cashier/server/templates"
-)
-
-// appContext contains local context - cookiestore, authsession etc.
-type appContext struct {
-	cookiestore   *sessions.CookieStore
-	requireReason bool
-}
-
-// getAuthTokenCookie retrieves a cookie from the request.
-func (a *appContext) getAuthTokenCookie(r *http.Request) *oauth2.Token {
-	session, _ := a.cookiestore.Get(r, "session")
-	t, ok := session.Values["token"]
-	if !ok {
-		return nil
-	}
-	var tok oauth2.Token
-	if err := json.Unmarshal(t.([]byte), &tok); err != nil {
-		return nil
-	}
-	if !tok.Valid() {
-		return nil
-	}
-	return &tok
-}
-
-// setAuthTokenCookie marshals the auth token and stores it as a cookie.
-func (a *appContext) setAuthTokenCookie(w http.ResponseWriter, r *http.Request, t *oauth2.Token) {
-	session, _ := a.cookiestore.Get(r, "session")
-	val, _ := json.Marshal(t)
-	session.Values["token"] = val
-	session.Save(r, w)
-}
-
-// getAuthStateCookie retrieves the oauth csrf state value from the client request.
-func (a *appContext) getAuthStateCookie(r *http.Request) string {
-	session, _ := a.cookiestore.Get(r, "session")
-	state, ok := session.Values["state"]
-	if !ok {
-		return ""
-	}
-	return state.(string)
-}
-
-// setAuthStateCookie saves the oauth csrf state value.
-func (a *appContext) setAuthStateCookie(w http.ResponseWriter, r *http.Request, state string) {
-	session, _ := a.cookiestore.Get(r, "session")
-	session.Values["state"] = state
-	session.Save(r, w)
-}
-
-func (a *appContext) getCurrentURL(r *http.Request) string {
-	session, _ := a.cookiestore.Get(r, "session")
-	path, ok := session.Values["auth_url"]
-	if !ok {
-		return ""
-	}
-	return path.(string)
-}
-
-func (a *appContext) setCurrentURL(w http.ResponseWriter, r *http.Request) {
-	session, _ := a.cookiestore.Get(r, "session")
-	session.Values["auth_url"] = r.URL.Path
-	session.Save(r, w)
-}
-
-func (a *appContext) isLoggedIn(w http.ResponseWriter, r *http.Request) bool {
-	tok := a.getAuthTokenCookie(r)
-	if !tok.Valid() || !authprovider.Valid(tok) {
-		return false
-	}
-	return true
-}
-
-func (a *appContext) login(w http.ResponseWriter, r *http.Request) (int, error) {
-	a.setCurrentURL(w, r)
-	http.Redirect(w, r, "/auth/login", http.StatusSeeOther)
-	return http.StatusSeeOther, nil
-}
-
-// parseKey retrieves and unmarshals the signing request.
-func extractKey(r *http.Request) (*lib.SignRequest, error) {
-	var s lib.SignRequest
-	if err := json.NewDecoder(r.Body).Decode(&s); err != nil {
-		return nil, err
-	}
-	return &s, nil
-}
-
-// signHandler handles the "/sign" path.
-// It unmarshals the client token to an oauth token, validates it and signs the provided public ssh key.
-func signHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	var t string
-	if ah := r.Header.Get("Authorization"); ah != "" {
-		if len(ah) > 6 && strings.ToUpper(ah[0:7]) == "BEARER " {
-			t = ah[7:]
-		}
-	}
-	if t == "" {
-		return http.StatusUnauthorized, errors.New(http.StatusText(http.StatusUnauthorized))
-	}
-	token := &oauth2.Token{
-		AccessToken: t,
-	}
-	if !authprovider.Valid(token) {
-		return http.StatusUnauthorized, errors.New(http.StatusText(http.StatusUnauthorized))
-	}
-
-	// Sign the pubkey and issue the cert.
-	req, err := extractKey(r)
-	if err != nil {
-		return http.StatusBadRequest, errors.Wrap(err, "unable to extract key from request")
-	}
-
-	if a.requireReason && req.Message == "" {
-		w.Header().Add("X-Need-Reason", "required")
-		return http.StatusForbidden, errors.New(http.StatusText(http.StatusForbidden))
-	}
-
-	username := authprovider.Username(token)
-	authprovider.Revoke(token) // We don't need this anymore.
-	cert, err := keysigner.SignUserKey(req, username)
-	if err != nil {
-		return http.StatusInternalServerError, errors.Wrap(err, "error signing key")
-	}
-	if err := certstore.SetCert(cert); err != nil {
-		log.Printf("Error recording cert: %v", err)
-	}
-	if err := json.NewEncoder(w).Encode(&lib.SignResponse{
-		Status:   "ok",
-		Response: string(lib.GetPublicKey(cert)),
-	}); err != nil {
-		return http.StatusInternalServerError, errors.Wrap(err, "error encoding response")
-	}
-	return http.StatusOK, nil
-}
-
-// loginHandler starts the authentication process with the provider.
-func loginHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	state := newState()
-	a.setAuthStateCookie(w, r, state)
-	http.Redirect(w, r, authprovider.StartSession(state), http.StatusFound)
-	return http.StatusFound, nil
-}
-
-// callbackHandler handles retrieving the access token from the auth provider and saves it for later use.
-func callbackHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	if r.FormValue("state") != a.getAuthStateCookie(r) {
-		return http.StatusUnauthorized, errors.New(http.StatusText(http.StatusUnauthorized))
-	}
-	code := r.FormValue("code")
-	token, err := authprovider.Exchange(code)
-	if err != nil {
-		return http.StatusInternalServerError, err
-	}
-	a.setAuthTokenCookie(w, r, token)
-	http.Redirect(w, r, a.getCurrentURL(r), http.StatusFound)
-	return http.StatusFound, nil
-}
-
-func encodeString(s string) string {
-	var buffer bytes.Buffer
-	chunkSize := 70
-	runes := []rune(base64.StdEncoding.EncodeToString([]byte(s)))
-
-	for i := 0; i < len(runes); i += chunkSize {
-		end := i + chunkSize
-		if end > len(runes) {
-			end = len(runes)
-		}
-		buffer.WriteString(string(runes[i:end]))
-		buffer.WriteString("\n")
-	}
-	buffer.WriteString(".\n")
-	return buffer.String()
-}
-
-// rootHandler starts the auth process. If the client is authenticated it renders the token to the user.
-func rootHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	if !a.isLoggedIn(w, r) {
-		return a.login(w, r)
-	}
-	tok := a.getAuthTokenCookie(r)
-	page := struct {
-		Token string
-	}{tok.AccessToken}
-	page.Token = encodeString(page.Token)
-
-	tmpl := template.Must(template.New("token.html").Parse(templates.Token))
-	tmpl.Execute(w, page)
-	return http.StatusOK, nil
-}
-
-func listRevokedCertsHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	revoked, err := certstore.GetRevoked()
-	if err != nil {
-		return http.StatusInternalServerError, err
-	}
-	rl, err := keysigner.GenerateRevocationList(revoked)
-	if err != nil {
-		return http.StatusInternalServerError, errors.Wrap(err, "unable to generate KRL")
-	}
-	w.Header().Set("Content-Type", "application/octet-stream")
-	w.Write(rl)
-	return http.StatusOK, nil
-}
-
-func listAllCertsHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	if !a.isLoggedIn(w, r) {
-		return a.login(w, r)
-	}
-	tmpl := template.Must(template.New("certs.html").Parse(templates.Certs))
-	tmpl.Execute(w, map[string]interface{}{
-		csrf.TemplateTag: csrf.TemplateField(r),
-	})
-	return http.StatusOK, nil
-}
-
-func listCertsJSONHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	if !a.isLoggedIn(w, r) {
-		return http.StatusUnauthorized, errors.New(http.StatusText(http.StatusUnauthorized))
-	}
-	includeExpired, _ := strconv.ParseBool(r.URL.Query().Get("all"))
-	certs, err := certstore.List(includeExpired)
-	if err != nil {
-		return http.StatusInternalServerError, err
-	}
-	j, err := json.Marshal(certs)
-	if err != nil {
-		return http.StatusInternalServerError, err
-	}
-	w.Write(j)
-	return http.StatusOK, nil
-}
-
-func revokeCertHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
-	if !a.isLoggedIn(w, r) {
-		return a.login(w, r)
-	}
-	r.ParseForm()
-	if err := certstore.Revoke(r.Form["cert_id"]); err != nil {
-		return http.StatusInternalServerError, errors.Wrap(err, "unable to revoke certs")
-	}
-	http.Redirect(w, r, "/admin/certs", http.StatusSeeOther)
-	return http.StatusSeeOther, nil
-}
-
-func healthcheck(w http.ResponseWriter, r *http.Request) {
-	w.WriteHeader(http.StatusOK)
-	fmt.Fprint(w, "ok")
-}
-
-// appHandler is a handler which uses appContext to manage state.
-type appHandler struct {
-	*appContext
-	h func(*appContext, http.ResponseWriter, *http.Request) (int, error)
-}
-
-// ServeHTTP handles the request and writes responses.
-func (ah appHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	status, err := ah.h(ah.appContext, w, r)
-	if err != nil {
-		http.Error(w, err.Error(), status)
-	}
-}
-
-// newState generates a state identifier for the oauth process.
-func newState() string {
-	k := make([]byte, 32)
-	if _, err := io.ReadFull(rand.Reader, k); err != nil {
-		return "unexpectedstring"
-	}
-	return hex.EncodeToString(k)
-}
-
-// mwVersion is middleware to add a X-Cashier-Version header to the response.
-func mwVersion(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("X-Cashier-Version", lib.Version)
-		next.ServeHTTP(w, r)
-	})
-}
-
-func runHTTPServer(conf *config.Server, l net.Listener) {
-	var err error
-	ctx := &appContext{
-		cookiestore:   sessions.NewCookieStore([]byte(conf.CookieSecret)),
-		requireReason: conf.RequireReason,
-	}
-	ctx.cookiestore.Options = &sessions.Options{
-		MaxAge:   900,
-		Path:     "/",
-		Secure:   conf.UseTLS,
-		HttpOnly: true,
-	}
-
-	logfile := os.Stderr
-	if conf.HTTPLogFile != "" {
-		logfile, err = os.OpenFile(conf.HTTPLogFile, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0640)
-		if err != nil {
-			log.Printf("unable to open %s for writing. logging to stdout", conf.HTTPLogFile)
-			logfile = os.Stderr
-		}
-	}
-
-	CSRF := csrf.Protect([]byte(conf.CSRFSecret), csrf.Secure(conf.UseTLS))
-	r := mux.NewRouter()
-	r.Use(mwVersion)
-	r.Methods("GET").Path("/").Handler(appHandler{ctx, rootHandler})
-	r.Methods("GET").Path("/auth/login").Handler(appHandler{ctx, loginHandler})
-	r.Methods("GET").Path("/auth/callback").Handler(appHandler{ctx, callbackHandler})
-	r.Methods("POST").Path("/sign").Handler(appHandler{ctx, signHandler})
-	r.Methods("GET").Path("/revoked").Handler(appHandler{ctx, listRevokedCertsHandler})
-	r.Methods("POST").Path("/admin/revoke").Handler(CSRF(appHandler{ctx, revokeCertHandler}))
-	r.Methods("GET").Path("/admin/certs").Handler(CSRF(appHandler{ctx, listAllCertsHandler}))
-	r.Methods("GET").Path("/admin/certs.json").Handler(appHandler{ctx, listCertsJSONHandler})
-	r.Methods("GET").Path("/metrics").Handler(promhttp.Handler())
-	r.Methods("GET").Path("/healthcheck").HandlerFunc(healthcheck)
-
-	box := packr.NewBox("static")
-	r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(box)))
-	h := handlers.LoggingHandler(logfile, r)
-	s := &http.Server{
-		Handler: h,
-	}
-	s.Serve(l)
-}