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package server
import (
"crypto/rand"
"encoding/hex"
"encoding/json"
"fmt"
"html/template"
"io"
"log"
"net/http"
"strconv"
"strings"
"github.com/gorilla/csrf"
"github.com/nsheridan/cashier/lib"
"github.com/nsheridan/cashier/server/store"
"github.com/nsheridan/cashier/server/templates"
"github.com/pkg/errors"
"golang.org/x/oauth2"
)
func (a *app) sign(w http.ResponseWriter, r *http.Request) {
var t string
if ah := r.Header.Get("Authorization"); ah != "" {
if len(ah) > 6 && strings.ToUpper(ah[0:7]) == "BEARER " {
t = ah[7:]
}
}
token := &oauth2.Token{
AccessToken: t,
}
if !a.authprovider.Valid(token) {
w.WriteHeader(http.StatusUnauthorized)
fmt.Fprint(w, http.StatusText(http.StatusUnauthorized))
return
}
// Sign the pubkey and issue the cert.
req := &lib.SignRequest{}
if err := json.NewDecoder(r.Body).Decode(req); err != nil {
fmt.Println(err)
w.WriteHeader(http.StatusBadRequest)
fmt.Fprint(w, http.StatusText(http.StatusBadRequest))
return
}
if a.requireReason && req.Message == "" {
w.Header().Add("X-Need-Reason", "required")
w.WriteHeader(http.StatusForbidden)
fmt.Fprint(w, http.StatusText(http.StatusForbidden))
return
}
username := a.authprovider.Username(token)
a.authprovider.Revoke(token) // We don't need this anymore.
cert, err := a.keysigner.SignUserKey(req, username)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, "Error signing key")
return
}
rec := store.MakeRecord(cert)
rec.Message = req.Message
if err := a.certstore.SetRecord(rec); 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 {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, "Error signing key")
return
}
}
func (a *app) auth(w http.ResponseWriter, r *http.Request) {
switch r.URL.EscapedPath() {
case "/auth/login":
buf := make([]byte, 32)
io.ReadFull(rand.Reader, buf)
state := hex.EncodeToString(buf)
a.setSessionVariable(w, r, "state", state)
http.Redirect(w, r, a.authprovider.StartSession(state), http.StatusFound)
case "/auth/callback":
state := a.getSessionVariable(r, "state")
if r.FormValue("state") != state {
log.Printf("Not authorized on /auth/callback")
w.WriteHeader(http.StatusUnauthorized)
w.Write([]byte(http.StatusText(http.StatusUnauthorized)))
break
}
originURL := a.getSessionVariable(r, "origin_url")
if originURL == "" {
originURL = "/"
}
code := r.FormValue("code")
token, err := a.authprovider.Exchange(code)
if err != nil {
log.Printf("Error on /auth/callback: %v", err)
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(http.StatusText(http.StatusInternalServerError)))
w.Write([]byte(err.Error()))
break
}
log.Printf("Token found on /auth/callback, redirecting to %s", originURL)
a.setAuthToken(w, r, token)
http.Redirect(w, r, originURL, http.StatusFound)
default:
w.WriteHeader(http.StatusInternalServerError)
}
}
func (a *app) index(w http.ResponseWriter, r *http.Request) {
tok := a.getAuthToken(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)
}
func (a *app) revoked(w http.ResponseWriter, r *http.Request) {
revoked, err := a.certstore.GetRevoked()
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, errors.Wrap(err, "error retrieving revoked certs").Error())
return
}
rl, err := a.keysigner.GenerateRevocationList(revoked)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprintf(w, errors.Wrap(err, "unable to generate KRL").Error())
return
}
w.Header().Set("Content-Type", "application/octet-stream")
w.Write(rl)
}
func (a *app) getAllCerts(w http.ResponseWriter, r *http.Request) {
tmpl := template.Must(template.New("certs.html").Parse(templates.Certs))
tmpl.Execute(w, map[string]interface{}{
csrf.TemplateTag: csrf.TemplateField(r),
})
}
func (a *app) getCertsJSON(w http.ResponseWriter, r *http.Request) {
includeExpired, _ := strconv.ParseBool(r.URL.Query().Get("all"))
certs, err := a.certstore.List(includeExpired)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprint(w, http.StatusText(http.StatusInternalServerError))
return
}
if err := json.NewEncoder(w).Encode(certs); err != nil {
w.WriteHeader(http.StatusInternalServerError)
fmt.Fprint(w, http.StatusText(http.StatusInternalServerError))
return
}
}
func (a *app) revoke(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
if err := a.certstore.Revoke(r.Form["cert_id"]); err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte("Unable to revoke certs"))
} else {
http.Redirect(w, r, "/admin/certs", http.StatusSeeOther)
}
}
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