web_site.ml 49.3 KB
Newer Older
Stephane Glondu's avatar
Stephane Glondu committed
1 2 3
(**************************************************************************)
(*                                BELENIOS                                *)
(*                                                                        *)
Stephane Glondu's avatar
Stephane Glondu committed
4
(*  Copyright © 2012-2014 Inria                                           *)
Stephane Glondu's avatar
Stephane Glondu committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
(*                                                                        *)
(*  This program is free software: you can redistribute it and/or modify  *)
(*  it under the terms of the GNU Affero General Public License as        *)
(*  published by the Free Software Foundation, either version 3 of the    *)
(*  License, or (at your option) any later version, with the additional   *)
(*  exemption that compiling, linking, and/or using OpenSSL is allowed.   *)
(*                                                                        *)
(*  This program is distributed in the hope that it will be useful, but   *)
(*  WITHOUT ANY WARRANTY; without even the implied warranty of            *)
(*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *)
(*  Affero General Public License for more details.                       *)
(*                                                                        *)
(*  You should have received a copy of the GNU Affero General Public      *)
(*  License along with this program.  If not, see                         *)
(*  <http://www.gnu.org/licenses/>.                                       *)
(**************************************************************************)

22
open Lwt
23
open Platform
24
open Serializable_j
25
open Signatures
26
open Common
Stephane Glondu's avatar
Stephane Glondu committed
27
open Web_serializable_j
28
open Web_common
29
open Web_signatures
30
open Web_services
Stephane Glondu's avatar
Stephane Glondu committed
31

32 33
let source_file = ref "belenios.tar.gz"
let spool_dir = ref "."
Stephane Glondu's avatar
Stephane Glondu committed
34

35 36 37 38 39 40 41 42 43 44 45 46
let get_single_line x =
  match_lwt Lwt_stream.get x with
  | None -> return None
  | Some _ as line ->
    lwt b = Lwt_stream.is_empty x in
    if b then (
      return line
    ) else (
      Lwt_stream.junk_while (fun _ -> true) x >>
      return None
    )

47 48
let ( / ) = Filename.concat

49 50 51 52 53 54 55 56
let delete_shallow_directory dir =
  lwt () =
    Lwt_unix.files_of_directory dir |>
    Lwt_stream.filter (fun x -> x <> "." && x <> "..") |>
    Lwt_stream.iter_s (fun x -> Lwt_unix.unlink (dir/x))
  in
  Lwt_unix.rmdir dir

Stephane Glondu's avatar
Stephane Glondu committed
57
module PString = String
Stephane Glondu's avatar
Stephane Glondu committed
58

Stephane Glondu's avatar
Stephane Glondu committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
open Eliom_service
open Eliom_registration

module LwtRandom = MakeLwtRandom (struct let rng = make_rng () end)

(* Persistent table, used to initialize the server. *)
let election_ptable = Ocsipersist.open_table "site_elections"

(* Table with elections in setup mode. *)
let election_stable = Ocsipersist.open_table "site_setup"

(* Table with tokens given to trustees. *)
let election_pktokens = Ocsipersist.open_table "site_pktokens"

(* Table with tokens given to credential authorities. *)
let election_credtokens = Ocsipersist.open_table "site_credtokens"

module T = Web_templates

78 79
let web_election_data (raw_election, web_params) =
  let params = Group.election_params_of_string raw_election in
Stephane Glondu's avatar
Stephane Glondu committed
80
  let module D = struct
Stephane Glondu's avatar
Stephane Glondu committed
81
    include (val params : ELECTION_DATA)
82
    include (val web_params : WEB_PARAMS)
Stephane Glondu's avatar
Stephane Glondu committed
83
  end in
84 85 86 87 88
  (module D : WEB_ELECTION_DATA)

let find_election uuid =
  lwt x = Ocsipersist.find election_ptable uuid in
  return (web_election_data x)
Stephane Glondu's avatar
Stephane Glondu committed
89 90 91 92

(* Mutex to avoid simultaneous registrations of the same election *)
let registration_mutex = Lwt_mutex.create ()

93
let import_election f =
Stephane Glondu's avatar
Stephane Glondu committed
94 95 96 97 98 99 100 101 102
  Lwt_mutex.lock registration_mutex >>
  try_lwt
    lwt raw_election =
      Lwt_io.lines_of_file f.f_election |>
      get_single_line >>=
      (function
      | Some e -> return e
      | None -> Printf.ksprintf
        failwith "election.json must contain a single line"
103
      )
Stephane Glondu's avatar
Stephane Glondu committed
104 105
    in
    let params = Group.election_params_of_string raw_election in
Stephane Glondu's avatar
Stephane Glondu committed
106 107
    let module P = (val params : ELECTION_DATA) in
    let uuid = Uuidm.to_string P.election.e_params.e_uuid in
Stephane Glondu's avatar
Stephane Glondu committed
108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
    lwt exists =
      try_lwt
        lwt _ = Ocsipersist.find election_ptable uuid in
        return true
      with Not_found -> return false
    in
    if exists then (
      Lwt_mutex.unlock registration_mutex;
      return None
    ) else (
      let dir = !spool_dir/uuid in
      lwt metadata =
        Lwt_io.chars_of_file f.f_metadata |>
        Lwt_stream.to_string >>=
        wrap1 metadata_of_string
      in
      let module X = struct
        let metadata = metadata
        let dir = dir
127
      end in
Stephane Glondu's avatar
Stephane Glondu committed
128
      let web_params = (module X : WEB_PARAMS) in
129
      let module G = P.G in
Stephane Glondu's avatar
Stephane Glondu committed
130 131
      let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
      let public_keys = Lwt_io.lines_of_file f.f_public_keys in
Stephane Glondu's avatar
Stephane Glondu committed
132
      let voters = Lwt_io.lines_of_file f.f_voters in
133 134 135 136 137
      lwt () =
        match_lwt Lwt_stream.peek voters with
        | Some _ -> return_unit
        | None -> Lwt.fail (Failure "No voters")
      in
138 139 140 141 142 143 144 145 146 147 148 149
      lwt () =
        match metadata.e_auth_config with
        | Some [x] ->
           if x.auth_system = "password" then
             let table = "password_" ^ underscorize uuid in
             let table = Ocsipersist.open_table table in
             lwt n = Ocsipersist.length table in
             if n = 0 then Lwt.fail (Failure "No passwords")
             else return_unit
           else return_unit
        | _ -> return_unit
      in
Stephane Glondu's avatar
Stephane Glondu committed
150 151 152 153 154 155 156
      lwt pks = Lwt_stream.(
        clone public_keys |>
        map (trustee_public_key_of_string G.read) |>
        to_list >>= wrap1 Array.of_list
      ) in
      if not (Array.forall KG.check pks) then
        failwith "Public keys are invalid.";
Stephane Glondu's avatar
Stephane Glondu committed
157
      if not G.(P.election.e_params.e_public_key =~ KG.combine pks) then
Stephane Glondu's avatar
Stephane Glondu committed
158 159 160 161 162 163 164 165
        failwith "Public keys mismatch with election public key.";
      let public_creds = Lwt_io.lines_of_file f.f_public_creds in
      lwt () = Lwt_stream.(
        clone public_creds |>
        iter_s (fun x ->
          if not G.(check @@ of_string x) then (
            Lwt.fail @@ Failure "Public credentials are invalid."
          ) else return ()
166
        )
Stephane Glondu's avatar
Stephane Glondu committed
167 168 169 170 171 172 173 174 175 176 177
      ) in
      let module R = struct
        let register () =
          try_lwt
            Lwt_unix.mkdir dir 0o700 >>
            Lwt_io.(with_file Output (dir/"election.json") (fun oc ->
              write_line oc raw_election
            )) >>
            Lwt_io.(with_file Output (dir/"public_keys.jsons") (fun oc ->
              write_lines oc public_keys
            )) >>
Stephane Glondu's avatar
Stephane Glondu committed
178 179 180
            Lwt_io.(with_file Output (dir/"voters.txt") (fun oc ->
              write_lines oc voters
            )) >>
181 182
            let election = web_election_data (raw_election, web_params) in
            let module W = Web_election.Make ((val election)) (LwtRandom) in
183
            lwt () =
184
              match W.D.metadata.e_auth_config with
185 186 187 188 189 190 191 192 193
              | None -> return ()
              | Some xs ->
                 let auth_config =
                   List.map (fun {auth_system; auth_instance; auth_config} ->
                     auth_instance, (auth_system, List.map snd auth_config)
                   ) xs
                 in
                 Web_persist.set_auth_config uuid auth_config
            in
Stephane Glondu's avatar
Stephane Glondu committed
194 195 196 197 198 199 200 201 202 203
            let () =
              Ocsigen_messages.debug (fun () ->
                Printf.sprintf "Injecting credentials for %s" uuid
              )
            in
            public_creds |>
            Lwt_stream.iter_s W.B.inject_cred >>
            W.B.update_files () >>
            Ocsipersist.add election_ptable uuid (raw_election, web_params) >>
            let () = Lwt_mutex.unlock registration_mutex in
204
            return (module W : WEB_ELECTION)
Stephane Glondu's avatar
Stephane Glondu committed
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219
          with e ->
            lwt () =
              try_lwt delete_shallow_directory dir
              with e ->
                Printf.ksprintf
                  (fun s ->
                   return (Ocsigen_messages.unexpected_exception e s))
                  "error while deleting %s after failure of %s"
                  dir uuid
            in
            Lwt_mutex.unlock registration_mutex;
            Lwt.fail e
      end in
      (* until here, no side-effects on the running server *)
      return @@ Some (module R : REGISTRABLE_ELECTION)
Stephane Glondu's avatar
Stephane Glondu committed
220
    )
Stephane Glondu's avatar
Stephane Glondu committed
221 222 223 224 225 226
  with e ->
    Lwt_mutex.unlock registration_mutex;
    Lwt.fail e

let () = Any.register ~service:home
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
227
    Eliom_reference.unset Web_auth_state.cont >>
228
    T.home () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
229 230 231 232
  )

let () = Html5.register ~service:admin
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
233 234 235
    let cont () = Redirection.send admin in
    Eliom_reference.set Web_auth_state.cont [cont] >>
    lwt site_user = Web_auth_state.get_site_user () in
Stephane Glondu's avatar
Stephane Glondu committed
236
    lwt elections =
237
      match site_user with
238
      | None -> return None
Stephane Glondu's avatar
Stephane Glondu committed
239
      | Some u ->
240
         lwt elections, tallied =
241 242
           Ocsipersist.fold_step (fun uuid_s (_, web_params) accu ->
             let module W = (val web_params : WEB_PARAMS) in
243
             if W.metadata.e_owner = Some u then (
244
               lwt w = find_election uuid_s in
245
               lwt state = Web_persist.get_election_state uuid_s in
246
               lwt date = Web_persist.get_election_date uuid_s in
247
               let elections, tallied = accu in
248
               match state with
249 250
               | `Tallied _ -> return (elections, (date, w) :: tallied)
               | _ -> return ((date, w) :: elections, tallied)
251
             ) else (
252
               return accu
253
             )
254
           ) election_ptable ([], [])
255 256 257
         and setup_elections =
           Ocsipersist.fold_step (fun k v accu ->
             if v.se_owner = u
258
             then return ((uuid_of_string k, v.se_questions.t_name) :: accu)
259 260
             else return accu
           ) election_stable []
261 262 263 264 265 266 267
         in
         let sort l =
           List.sort (fun (x, _) (y, _) -> datetime_compare x y) l |>
           List.map (fun (_, x) -> x)
         in
         let elections = sort elections and tallied = sort tallied in
         return @@ Some (elections, tallied, setup_elections)
Stephane Glondu's avatar
Stephane Glondu committed
268
    in
269
    T.admin ~elections ()
Stephane Glondu's avatar
Stephane Glondu committed
270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285
  )

let () = File.register
  ~service:source_code
  ~content_type:"application/x-gzip"
  (fun () () -> return !source_file)

let do_get_randomness =
  let prng = Lazy.lazy_from_fun (Lwt_preemptive.detach (fun () ->
    pseudo_rng (random_string secure_rng 16)
  )) in
  let mutex = Lwt_mutex.create () in
  fun () ->
    Lwt_mutex.with_lock mutex (fun () ->
      lwt prng = Lazy.force prng in
      return (random_string prng 32)
286 287
    )

Stephane Glondu's avatar
Stephane Glondu committed
288 289 290 291 292 293 294 295 296 297 298 299 300
let () = String.register
  ~service:get_randomness
  (fun () () ->
    lwt r = do_get_randomness () in
    b64_encode_compact r |>
    (fun x -> string_of_randomness { randomness=x }) |>
    (fun x -> return (x, "application/json"))
  )

let generate_uuid = Uuidm.v4_gen (Random.State.make_self_init ())

let () = Redirection.register ~service:election_setup_new
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
301
   match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
302 303 304 305 306 307
   | Some u ->
      let uuid = generate_uuid () in
      let uuid_s = Uuidm.to_string uuid in
      lwt token = generate_token () in
      let se_metadata = {
        e_owner = Some u;
308
        e_auth_config = Some [{auth_system = "password"; auth_instance = "password"; auth_config = []}];
309
        e_cred_authority = None;
Stephane Glondu's avatar
Stephane Glondu committed
310 311
      } in
      let question = {
312 313
        q_answers = [| "Answer 1"; "Answer 2"; "Blank" |];
        q_min = 1;
Stephane Glondu's avatar
Stephane Glondu committed
314 315 316 317 318 319 320 321 322 323 324 325
        q_max = 1;
        q_question = "Question 1?";
      } in
      let se_questions = {
        t_description = "Description of the election.";
        t_name = "Name of the election";
        t_questions = [| question |];
        t_short_name = "short_name";
      } in
      let se = {
        se_owner = u;
        se_group = "{\"g\":\"14887492224963187634282421537186040801304008017743492304481737382571933937568724473847106029915040150784031882206090286938661464458896494215273989547889201144857352611058572236578734319505128042602372864570426550855201448111746579871811249114781674309062693442442368697449970648232621880001709535143047913661432883287150003429802392229361583608686643243349727791976247247948618930423866180410558458272606627111270040091203073580238905303994472202930783207472394578498507764703191288249547659899997131166130259700604433891232298182348403175947450284433411265966789131024573629546048637848902243503970966798589660808533\",\"p\":\"16328632084933010002384055033805457329601614771185955389739167309086214800406465799038583634953752941675645562182498120750264980492381375579367675648771293800310370964745767014243638518442553823973482995267304044326777047662957480269391322789378384619428596446446984694306187644767462460965622580087564339212631775817895958409016676398975671266179637898557687317076177218843233150695157881061257053019133078545928983562221396313169622475509818442661047018436264806901023966236718367204710755935899013750306107738002364137917426595737403871114187750804346564731250609196846638183903982387884578266136503697493474682071\",\"q\":\"61329566248342901292543872769978950870633559608669337131139375508370458778917\"}";
Stephane Glondu's avatar
Stephane Glondu committed
326
        se_voters = [];
Stephane Glondu's avatar
Stephane Glondu committed
327 328 329 330 331 332 333 334 335 336 337
        se_questions;
        se_public_keys = [];
        se_metadata;
        se_public_creds = token;
      } in
      lwt () = Ocsipersist.add election_stable uuid_s se in
      lwt () = Ocsipersist.add election_credtokens token uuid_s in
      return (preapply election_setup uuid)
  | None -> forbidden ()
  )

338 339 340 341 342 343 344 345 346 347
let generic_setup_page f uuid () =
  match_lwt Web_auth_state.get_site_user () with
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
     lwt se = Ocsipersist.find election_stable uuid_s in
     if se.se_owner = u
     then f uuid se ()
     else forbidden ()
  | None -> forbidden ()

Stephane Glondu's avatar
Stephane Glondu committed
348
let () = Html5.register ~service:election_setup
349
  (generic_setup_page T.election_setup)
Stephane Glondu's avatar
Stephane Glondu committed
350

351
let () = Html5.register ~service:election_setup_trustees
352 353 354 355
  (generic_setup_page T.election_setup_trustees)

let () = Html5.register ~service:election_setup_credential_authority
  (generic_setup_page T.election_setup_credential_authority)
356

Stephane Glondu's avatar
Stephane Glondu committed
357 358
let election_setup_mutex = Lwt_mutex.create ()

359
let handle_setup f uuid x =
Stephane Glondu's avatar
Stephane Glondu committed
360
  match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
361 362 363 364 365 366
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
     Lwt_mutex.with_lock election_setup_mutex (fun () ->
       lwt se = Ocsipersist.find election_stable uuid_s in
       if se.se_owner = u then (
         try_lwt
367
           lwt cont = f se x u uuid in
Stephane Glondu's avatar
Stephane Glondu committed
368
           Ocsipersist.add election_stable uuid_s se >>
369
           cont ()
Stephane Glondu's avatar
Stephane Glondu committed
370
         with e ->
371
           T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
372 373 374
       ) else forbidden ()
     )
  | None -> forbidden ()
375

376 377
let redir_preapply s u () = Redirection.send (preapply s u)

378 379 380 381
let () =
  Any.register
    ~service:election_setup_description
    (handle_setup
382
       (fun se (name, description) _ uuid ->
383 384 385
         se.se_questions <- {se.se_questions with
           t_name = name;
           t_description = description;
386 387
         };
         return (redir_preapply election_setup uuid)))
388

Stephane Glondu's avatar
Stephane Glondu committed
389 390 391 392
let () =
  Any.register
    ~service:election_setup_group
    (handle_setup
393
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
394 395
        let _group = Group.of_string x in
        (* we keep it as a string since it contains a type *)
396 397
        se.se_group <- x;
        return (redir_preapply election_setup uuid)))
398

Stephane Glondu's avatar
Stephane Glondu committed
399 400 401 402
let () =
  Any.register
    ~service:election_setup_metadata
    (handle_setup
403
       (fun se x u uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
404 405
        let metadata = metadata_of_string x in
        if metadata.e_owner <> Some u then failwith "wrong owner";
406 407
        se.se_metadata <- metadata;
        return (redir_preapply election_setup uuid)))
408

409 410 411 412
let () =
  Any.register
    ~service:election_setup_auth
    (handle_setup
413 414
       (fun se auth_system _ uuid ->
         (match auth_system with
415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433
         | Some (("dummy" | "password") as auth_system) ->
            se.se_metadata <- {
              se.se_metadata with
                e_auth_config = Some [{
                  auth_system;
                  auth_instance = auth_system;
                  auth_config = []
                }]
            }
         | Some "cas" ->
            se.se_metadata <- {
              se.se_metadata with
                e_auth_config = Some [{
                  auth_system = "cas";
                  auth_instance = "cas";
                  auth_config = ["server", ""];
                }]
            }
         | Some x -> failwith ("unknown authentication system: "^x)
434 435
         | None -> failwith "no authentication system was given");
         return (redir_preapply election_setup uuid)))
436 437 438 439 440

let () =
  Any.register
    ~service:election_setup_auth_cas
    (handle_setup
441
       (fun se server _ uuid ->
442 443 444 445 446 447 448
         se.se_metadata <- {
           se.se_metadata with
             e_auth_config = Some [{
               auth_system = "cas";
               auth_instance = "cas";
               auth_config = ["server", server];
             }]
449 450
         };
         return (redir_preapply election_setup uuid)))
451

452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473
let template_password = format_of_string
  "You are listed as a voter for the election

  %s

You will find below your login and password.  To cast a vote, you will
also need a credential, sent in a separate email.  Be careful,
passwords and credentials look similar but play different roles.  You
will be asked to enter your credential before entering the voting
booth.  Login and passwords are required once your ballot is ready to
be cast.

Username: %s
Password: %s
Page of the election: %s

Note that you are allowed to vote several times.  Only the last vote
counts.

-- 
Belenios"

474 475 476 477 478 479 480 481 482
let generate_password table title url v =
  lwt salt = generate_token () in
  lwt password = generate_token () in
  let hashed = sha256_hex (salt ^ password) in
  lwt () = Ocsipersist.add table v (salt, hashed) in
  let body = Printf.sprintf template_password title v password url in
  let subject = "Your password for election " ^ title in
  send_email "noreply@belenios.org" v subject body

483 484 485 486 487 488 489 490 491 492
let () =
  Any.register
    ~service:election_setup_auth_genpwd
    (handle_setup
       (fun se () _ uuid ->
         let table =
           "password_" ^
           let u = Uuidm.to_string uuid in
           underscorize u
         in
493 494 495 496 497
         let title = se.se_questions.t_name in
         let url = Eliom_uri.make_string_uri
           ~absolute:true ~service:election_home
           (uuid, ()) |> rewrite_prefix
         in
498
         let table = Ocsipersist.open_table table in
499
         Lwt_list.iter_s (generate_password table title url) se.se_voters >>
500 501 502
         return (fun () ->
           T.generic_page ~title:"Success"
             "Passwords have been generated and mailed!" () >>= Html5.send)))
503

504 505 506
let () =
  Any.register
    ~service:election_regenpwd
507 508 509 510 511 512 513
    (fun (uuid, ()) user ->
      T.regenpwd uuid () >>= Html5.send)

let () =
  Any.register
    ~service:election_regenpwd_post
    (fun (uuid, ()) user ->
514
      let uuid_s = Uuidm.to_string uuid in
515 516
      lwt w = find_election uuid_s in
      let module W = (val w) in
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
      lwt site_user = Web_auth_state.get_site_user () in
      match site_user with
      | Some u when W.metadata.e_owner = Some u ->
         let table = "password_" ^ underscorize uuid_s in
         let table = Ocsipersist.open_table table in
         let title = W.election.e_params.e_name in
         let url = Eliom_uri.make_string_uri
           ~absolute:true ~service:election_home
           (uuid, ()) |> rewrite_prefix
         in
         begin try_lwt
           lwt _ = Ocsipersist.find table user in
           generate_password table title url user >>
           T.generic_page ~title:"Success"
             ("A new password has been mailed to " ^ user ^ ".") ()
           >>= Html5.send
         with Not_found ->
           T.generic_page ~title:"Error"
             (user ^ " is not a registered user for this election.") ()
           >>= Html5.send
         end
      | _ -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
541 542 543 544
let () =
  Html5.register
    ~service:election_setup_questions
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
545
     match_lwt Web_auth_state.get_site_user () with
546 547
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
548 549
        lwt se = Ocsipersist.find election_stable uuid_s in
        if se.se_owner = u
550
        then T.election_setup_questions uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
551 552
        else forbidden ()
     | None -> forbidden ()
553 554
    )

Stephane Glondu's avatar
Stephane Glondu committed
555 556 557 558
let () =
  Any.register
    ~service:election_setup_questions_post
    (handle_setup
559 560 561
       (fun se x _ uuid ->
        se.se_questions <- template_of_string x;
         return (redir_preapply election_setup_questions uuid)))
Stephane Glondu's avatar
Stephane Glondu committed
562

Stephane Glondu's avatar
Stephane Glondu committed
563 564 565 566
let () =
  Html5.register
    ~service:election_setup_voters
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
567
      match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
568 569 570 571
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
         lwt se = Ocsipersist.find election_stable uuid_s in
         if se.se_owner = u
572
         then T.election_setup_voters uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589
         else forbidden ()
      | None -> forbidden ()
    )

(* see http://www.regular-expressions.info/email.html *)
let email_rex = Pcre.regexp
  ~flags:[`CASELESS]
  "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,7}$"

let is_email x =
  try ignore (Pcre.pcre_exec ~rex:email_rex x); true
  with Not_found -> false

let () =
  Any.register
    ~service:election_setup_voters_post
    (handle_setup
590
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
591 592 593 594 595 596 597
         let xs = Pcre.split x in
         let () =
           try
             let bad = List.find (fun x -> not (is_email x)) xs in
             Printf.ksprintf failwith "%S is not a valid address" bad
           with Not_found -> ()
         in
598 599
         se.se_voters <- xs;
         return (redir_preapply election_setup uuid)))
Stephane Glondu's avatar
Stephane Glondu committed
600

Stephane Glondu's avatar
Stephane Glondu committed
601 602 603
let () =
  Redirection.register
    ~service:election_setup_trustee_add
604
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
605
     match_lwt Web_auth_state.get_site_user () with
606 607
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
608 609 610 611 612 613 614 615 616 617
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
          lwt se = Ocsipersist.find election_stable uuid_s in
          if se.se_owner = u
          then (
            lwt token = generate_token () in
            se.se_public_keys <- (token, ref "") :: se.se_public_keys;
            Ocsipersist.add election_stable uuid_s se >>
            Ocsipersist.add election_pktokens token uuid_s
          ) else forbidden ()
        ) >>
618
        return (preapply election_setup_trustees uuid)
619 620 621 622 623 624 625
     | None -> forbidden ()
    )

let () =
  Redirection.register
    ~service:election_setup_trustee_del
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
626
     match_lwt Web_auth_state.get_site_user () with
627 628 629 630 631 632 633 634 635 636 637 638 639 640
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
          lwt se = Ocsipersist.find election_stable uuid_s in
          if se.se_owner = u
          then (
            match se.se_public_keys with
            | (token, _) :: xs ->
               se.se_public_keys <- xs;
               Ocsipersist.add election_stable uuid_s se >>
               Ocsipersist.remove election_pktokens token
            | _ -> return ()
          ) else forbidden ()
        ) >>
641
        return (preapply election_setup_trustees uuid)
642 643 644
     | None -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
645 646 647 648 649 650 651 652
let () =
  Html5.register
    ~service:election_setup_credentials
    (fun token () ->
     lwt uuid = Ocsipersist.find election_credtokens token in
     lwt se = Ocsipersist.find election_stable uuid in
     T.election_setup_credentials token uuid se ()
    )
653

Stephane Glondu's avatar
Stephane Glondu committed
654 655 656 657 658 659 660 661
let () =
  File.register
    ~service:election_setup_credentials_download
    ~content_type:"text/plain"
    (fun token () ->
     lwt uuid = Ocsipersist.find election_credtokens token in
     return (!spool_dir / uuid ^ ".public_creds.txt")
    )
662

Stephane Glondu's avatar
Stephane Glondu committed
663 664 665
let wrap_handler f =
  try_lwt f ()
  with
666
  | e -> T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692

let handle_credentials_post token creds =
  lwt uuid = Ocsipersist.find election_credtokens token in
  lwt se = Ocsipersist.find election_stable uuid in
  let module G = (val Group.of_string se.se_group : GROUP) in
  let fname = !spool_dir / uuid ^ ".public_creds.txt" in
  Lwt_mutex.with_lock
    election_setup_mutex
    (fun () ->
     Lwt_io.with_file
       ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
       ~perm:0o600 ~mode:Lwt_io.Output fname
       (fun oc -> Lwt_io.write_chars oc creds)
    ) >>
  lwt () =
    let i = ref 1 in
    Lwt_stream.iter
      (fun x ->
       try
         let x = G.of_string x in
         if not (G.check x) then raise Exit;
         incr i
       with _ ->
         Printf.ksprintf failwith "invalid credential at line %d" !i)
      (Lwt_io.lines_of_file fname)
  in
693
  let () = se.se_metadata <- {se.se_metadata with e_cred_authority = None} in
694 695
  T.generic_page ~title:"Success"
    "Credentials have been received and checked!" () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
696 697 698 699 700 701 702

let () =
  Any.register
    ~service:election_setup_credentials_post
    (fun token creds ->
     let s = Lwt_stream.of_string creds in
     wrap_handler (fun () -> handle_credentials_post token s))
703

Stephane Glondu's avatar
Stephane Glondu committed
704 705 706 707 708 709 710
let () =
  Any.register
    ~service:election_setup_credentials_post_file
    (fun token creds ->
     let s = Lwt_io.chars_of_file creds.Ocsigen_extensions.tmp_filename in
     wrap_handler (fun () -> handle_credentials_post token s))

711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753
module Credgen = struct
  module String = PString

  (* FIXME: duplicate of Tool_credgen *)

  let get_random_char =
    let prng = Lazy.lazy_from_fun (Lwt_preemptive.detach (fun () ->
      pseudo_rng (random_string secure_rng 16)
    )) in
    let mutex = Lwt_mutex.create () in
    fun () ->
      Lwt_mutex.with_lock mutex (fun () ->
        lwt prng = Lazy.force prng in
        let s = random_string prng 1 in
        return @@ s.[0]
      )

  (* Beware: the following must be changed in accordance with the booth! *)
  let digits = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
  let token_length = 14
  let n58 = Z.of_int 58
  let n53 = Z.of_int 53

  let generate_raw_token () =
    let res = String.create token_length in
    let rec loop i accu =
      if i < token_length then (
        lwt digit = get_random_char () in
        let digit = int_of_char digit mod 58 in
        res.[i] <- digits.[digit];
        loop (i+1) Z.(n58 * accu + of_int digit)
      ) else return (res, accu)
    in loop 0 Z.zero

  let add_checksum (raw, value) =
    let checksum = 53 - Z.(to_int (value mod n53)) in
    return (raw ^ String.make 1 digits.[checksum])

  let generate () =
    generate_raw_token () >>= add_checksum

end

754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775
let template_credential = format_of_string
  "You are listed as a voter for the election

  %s

You will find below your login and credential.  To cast a vote, you will
also need a password, sent in a separate email.  Be careful,
passwords and credentials look similar but play different roles.  You
will be asked to enter your credential before entering the voting
booth.  Login and passwords are required once your ballot is ready to
be cast.

Username: %s
Credential: %s
Page of the election: %s

Note that you are allowed to vote several times.  Only the last vote
counts.

-- 
Belenios"

776 777 778
let () =
  Any.register
    ~service:election_setup_credentials_server
779
    (handle_setup (fun se () _ uuid ->
780 781 782
      let () = se.se_metadata <- {se.se_metadata with
        e_cred_authority = Some "server"
      } in
783
      let uuid_s = Uuidm.to_string uuid in
784 785 786 787 788
      let title = se.se_questions.t_name in
      let url = Eliom_uri.make_string_uri
        ~absolute:true ~service:election_home
        (uuid, ()) |> rewrite_prefix
      in
789 790 791 792 793 794 795 796 797 798 799 800
      lwt se = Ocsipersist.find election_stable uuid_s in
      let module S = Set.Make (PString) in
      let module G = (val Group.of_string se.se_group : GROUP) in
      lwt creds =
        Lwt_list.fold_left_s (fun accu id ->
          lwt cred = Credgen.generate () in
          let priv_cred = derive_cred uuid cred in
          let pub_cred =
            let x = Z.(of_string_base 16 priv_cred mod G.q) in
            let y = G.(g **~ x) in
            G.to_string y
          in
801 802
          let body = Printf.sprintf template_credential title id cred url in
          let subject = "Your credential for election " ^ title in
803
          lwt () = send_email "noreply@belenios.org" id subject body in
804 805 806 807 808
          return @@ S.add pub_cred accu
        ) S.empty se.se_voters
      in
      let creds = S.elements creds in
      let fname = !spool_dir / uuid_s ^ ".public_creds.txt" in
809
      lwt () =
810 811 812 813
          Lwt_io.with_file
            ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
            ~perm:0o600 ~mode:Lwt_io.Output fname
            (fun oc ->
814
              Lwt_list.iter_s (Lwt_io.write_line oc) creds)
815
      in
816 817 818
      return (fun () ->
        T.generic_page ~title:"Success"
          "Credentials have been generated and mailed!" () >>= Html5.send)))
819

Stephane Glondu's avatar
Stephane Glondu committed
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847
let () =
  Html5.register
    ~service:election_setup_trustee
    (fun token () ->
     lwt uuid = Ocsipersist.find election_pktokens token in
     lwt se = Ocsipersist.find election_stable uuid in
     T.election_setup_trustee token uuid se ()
    )

let () =
  Any.register
    ~service:election_setup_trustee_post
    (fun token public_key ->
     wrap_handler
       (fun () ->
        lwt uuid = Ocsipersist.find election_pktokens token in
        Lwt_mutex.with_lock
          election_setup_mutex
          (fun () ->
           lwt se = Ocsipersist.find election_stable uuid in
           let pkref = List.assoc token se.se_public_keys in
           let module G = (val Group.of_string se.se_group : GROUP) in
           let pk = trustee_public_key_of_string G.read public_key in
           let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
           if not (KG.check pk) then failwith "invalid public key";
           (* we keep pk as a string because of G.t *)
           pkref := public_key;
           Ocsipersist.add election_stable uuid se
848 849 850
          ) >> T.generic_page ~title:"Success"
            "Your key has been received and checked!"
            () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
851 852 853 854 855 856 857
       )
    )

let () =
  Any.register
    ~service:election_setup_create
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
858
     match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
859 860 861
     | None -> forbidden ()
     | Some u ->
        begin try_lwt
862 863 864
          let uuid_s = Uuidm.to_string uuid in
          Lwt_mutex.with_lock election_setup_mutex (fun () ->
            lwt se = Ocsipersist.find election_stable uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
865 866 867
            if se.se_owner <> u then forbidden () else
            let group = Group.of_string se.se_group in
            let module G = (val group : GROUP) in
868
            let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
Stephane Glondu's avatar
Stephane Glondu committed
869
            (* construct election data in memory *)
870
            lwt public_keys, private_key =
Stephane Glondu's avatar
Stephane Glondu committed
871
              match se.se_public_keys with
872 873 874 875 876 877 878 879 880
              | [] ->
                 lwt private_key, public_key = KG.generate_and_prove () in
                 return ([public_key], Some private_key)
              | _ :: _ ->
                 return (List.rev_map
                   (fun (_, r) ->
                     if !r = "" then failwith "some public keys are missing";
                     trustee_public_key_of_string G.read !r
                   ) se.se_public_keys, None)
Stephane Glondu's avatar
Stephane Glondu committed
881 882 883 884 885 886
            in
            let y = KG.combine (Array.of_list public_keys) in
            let template = se.se_questions in
            let params = {
              e_description = template.t_description;
              e_name = template.t_name;
887
              e_public_key = {wpk_group = G.group; wpk_y = y};
Stephane Glondu's avatar
Stephane Glondu committed
888 889 890 891 892 893 894 895 896
              e_questions = template.t_questions;
              e_uuid = uuid;
              e_short_name = template.t_short_name;
            } in
            let files = {
              f_election = !spool_dir / uuid_s ^ ".election.json";
              f_metadata = !spool_dir / uuid_s ^ ".metadata.json";
              f_public_keys = !spool_dir / uuid_s ^ ".public_keys.jsons";
              f_public_creds = !spool_dir / uuid_s ^ ".public_creds.txt";
Stephane Glondu's avatar
Stephane Glondu committed
897
              f_voters = !spool_dir / uuid_s ^ ".voters.txt";
Stephane Glondu's avatar
Stephane Glondu committed
898 899 900 901 902 903
            } in
            lwt _ =
              try_lwt Lwt_unix.stat files.f_public_creds
              with _ -> failwith "public credentials are missing"
            in
            (* write election files to disk *)
904
            let create_file fname what xs =
Stephane Glondu's avatar
Stephane Glondu committed
905 906 907
              Lwt_io.with_file
                ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
                ~perm:0o600 ~mode:Lwt_io.Output fname
908 909 910 911 912
                (fun oc ->
                  Lwt_list.iter_s
                    (fun v ->
                      Lwt_io.write oc (what v) >>
                      Lwt_io.write oc "\n") xs)
Stephane Glondu's avatar
Stephane Glondu committed
913
            in
914 915 916 917
            create_file files.f_election (string_of_params (write_wrapped_pubkey G.write_group G.write)) [params] >>
            create_file files.f_metadata string_of_metadata [se.se_metadata] >>
            create_file files.f_voters (fun x -> x) se.se_voters >>
            create_file files.f_public_keys (string_of_trustee_public_key G.write) public_keys >>
Stephane Glondu's avatar
Stephane Glondu committed
918 919 920
            (* actually create the election *)
            begin match_lwt import_election files with
            | None ->
921
               T.new_election_failure `Exists () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
922 923 924 925
            | Some w ->
               let module W = (val w : REGISTRABLE_ELECTION) in
               lwt w = W.register () in
               let module W = (val w : WEB_ELECTION) in
926 927 928 929 930
               (* create file with private key, if any *)
               lwt () =
                 match private_key with
                 | None -> return ()
                 | Some x ->
931
                    let fname = W.D.dir / "private_key.json" in
932
                    create_file fname string_of_number [x]
933
               in
Stephane Glondu's avatar
Stephane Glondu committed
934 935 936 937 938
               (* clean up temporary files *)
               Lwt_unix.unlink files.f_election >>
               Lwt_unix.unlink files.f_metadata >>
               Lwt_unix.unlink files.f_public_keys >>
               Lwt_unix.unlink files.f_public_creds >>
Stephane Glondu's avatar
Stephane Glondu committed
939
               Lwt_unix.unlink files.f_voters >>
Stephane Glondu's avatar
Stephane Glondu committed
940 941 942 943 944 945 946
               (* clean up tokens *)
               Ocsipersist.remove election_credtokens se.se_public_creds >>
               Lwt_list.iter_s
                 (fun (token, _) ->
                  Ocsipersist.remove election_pktokens token)
                 se.se_public_keys >>
               Ocsipersist.remove election_stable uuid_s >>
947
               Web_persist.set_election_date uuid_s (now ()) >>
Stephane Glondu's avatar
Stephane Glondu committed
948
               Redirection.send
949
                 (preapply election_admin (W.D.election.e_params.e_uuid, ()))
Stephane Glondu's avatar
Stephane Glondu committed
950 951 952
            end
          )
        with e ->
953
          T.new_election_failure (`Exception e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
954 955
        end
    )
956

Stephane Glondu's avatar
Stephane Glondu committed
957 958 959 960
let () =
  Any.register
    ~service:election_home
    (fun (uuid, ()) () ->
961
      let uuid_s = Uuidm.to_string uuid in
962 963 964
      try_lwt
        lwt w = find_election uuid_s in
        let module W = (val w) in
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
        Eliom_reference.unset Web_services.ballot >>
        let cont () =
          Redirection.send
            (Eliom_service.preapply
               election_home (W.election.e_params.e_uuid, ()))
        in
        Eliom_reference.set Web_auth_state.cont [cont] >>
        match_lwt Eliom_reference.get Web_services.cast_confirmed with
        | Some result ->
           Eliom_reference.unset Web_services.cast_confirmed >>
           T.cast_confirmed (module W) ~result () >>= Html5.send
        | None ->
           lwt state = Web_persist.get_election_state uuid_s in
           T.election_home (module W) state () >>= Html5.send
      with Not_found ->
Stephane Glondu's avatar
Stephane Glondu committed
980
        T.generic_page ~title:"Sorry, this election is not yet open"
981 982
          "This election does not exist yet. Please come back later." ()
          >>= Html5.send)
983

Stephane Glondu's avatar
Stephane Glondu committed
984 985 986 987 988
let () =
  Any.register
    ~service:election_admin
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
989
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
990
     lwt site_user = Web_auth_state.get_site_user () in
991
     let module W = (val w) in
992 993 994 995
     let uuid = Uuidm.to_string W.election.e_params.e_uuid in
     match site_user with
     | Some u when W.metadata.e_owner = Some u ->
        lwt state = Web_persist.get_election_state uuid in
996
        T.election_admin (module W) state () >>= Html5.send
997 998
       | _ -> forbidden ()
    )
999

1000
let election_set_state state (uuid, ()) () =
Stephane Glondu's avatar
Stephane Glondu committed
1001
     let uuid_s = Uuidm.to_string uuid in
1002 1003
     lwt w = find_election uuid_s in
     let module W = (val w) in
1004
     lwt () =
Stephane Glondu's avatar
Stephane Glondu committed
1005
       match_lwt Web_auth_state.get_site_user () with
1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
       | Some u when W.metadata.e_owner = Some u -> return ()
       | _ -> forbidden ()
     in
     lwt () =
       match_lwt Web_persist.get_election_state uuid_s with
       | `Open | `Closed -> return ()
       | _ -> forbidden ()
     in
     let state = if state then `Open else `Closed in
     Web_persist.set_election_state uuid_s state >>
1016 1017 1018 1019
     Redirection.send (preapply election_admin (uuid, ()))

let () = Any.register ~service:election_open (election_set_state true)
let () = Any.register ~service:election_close (election_set_state false)
1020

Stephane Glondu's avatar
Stephane Glondu committed
1021 1022 1023 1024 1025
let () =
  Any.register
    ~service:election_update_credential
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
1026
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1027
     lwt site_user = Web_auth_state.get_site_user () in
1028
     let module W = (val w) in
1029 1030 1031
     match site_user with
     | Some u ->
        if W.metadata.e_owner = Some u then (
1032
          T.update_credential (module W) () >>= Html5.send
1033 1034 1035 1036
        ) else (
          forbidden ()
        )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1037 1038 1039 1040

let () =
  Any.register
    ~service:election_update_credential_post
1041
    (fun (uuid, ()) (old, new_) ->
Stephane Glondu's avatar
Stephane Glondu committed
1042
     let uuid_s = Uuidm.to_string uuid in
1043
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1044
     lwt site_user = Web_auth_state.get_site_user () in
1045
     let module W = Web_election.Make ((val w)) (LwtRandom) in
1046 1047
     let module B = W.B in
     let module W = W.D in
1048 1049 1050 1051
     match site_user with
     | Some u ->
       if W.metadata.e_owner = Some u then (
         try_lwt
1052
           B.update_cred ~old ~new_ >>
1053 1054 1055 1056 1057 1058 1059 1060
           String.send ("OK", "text/plain")
         with Error e ->
           String.send ("Error: " ^ explain_error e, "text/plain")
       ) >>= (fun x -> return @@ cast_unknown_content_kind x)
       else (
         forbidden ()
       )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1061 1062 1063 1064

let () =
  Any.register
    ~service:election_vote
1065
    (fun (uuid, ()) () ->
1066
      let uuid_s = Uuidm.to_string uuid in
1067 1068
      lwt w = find_election uuid_s in
      let module W = (val w) in
1069 1070 1071 1072 1073 1074 1075
      Eliom_reference.unset Web_services.ballot >>
      Redirection.send
        (Eliom_service.preapply
           (Eliom_service.static_dir_with_params
              ~get_params:(Eliom_parameter.string "election_url") ())
           (["static"; "vote.html"],
            "../elections/" ^ uuid_s ^ "/")))
1076

Stephane Glondu's avatar
Stephane Glondu committed
1077 1078 1079
let () =
  Any.register
    ~service:election_cast
1080
    (fun (uuid, ()) () ->
1081
      let uuid_s = Uuidm.to_string uuid in
1082 1083
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1084
      let cont () =
1085 1086 1087 1088
        Redirection.send
          (Eliom_service.preapply
             election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1089
      Eliom_reference.set Web_auth_state.cont [cont] >>
1090
      match_lwt Eliom_reference.get Web_services.ballot with
1091 1092
      | Some b -> T.cast_confirmation (module W) (sha256_b64 b) () >>= Html5.send
      | None -> T.cast_raw (module W) () >>= Html5.send)
Stephane Glondu's avatar
Stephane Glondu committed
1093 1094 1095 1096

let () =
  Any.register
    ~service:election_cast_post
1097 1098
    (fun (uuid, ()) (ballot_raw, ballot_file) ->
      let uuid_s = Uuidm.to_string uuid in
1099 1100
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1101
      lwt user = Web_auth_state.get_election_user uuid in
1102 1103 1104 1105 1106 1107 1108
      lwt the_ballot = match ballot_raw, ballot_file with
        | Some ballot, None -> return ballot
        | None, Some fi ->
           let fname = fi.Ocsigen_extensions.tmp_filename in
           Lwt_stream.to_string (Lwt_io.chars_of_file fname)
        | _, _ -> fail_http 400
      in
Stephane Glondu's avatar
Stephane Glondu committed
1109
      let cont () =
1110 1111 1112 1113
        Redirection.send
          (Eliom_service.preapply
             Web_services.election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1114
      Eliom_reference.set Web_auth_state.cont [cont] >>
1115 1116 1117 1118 1119 1120 1121
      Eliom_reference.set Web_services.ballot (Some the_ballot) >>
      match user with
      | None ->
         Redirection.send
           (Eliom_service.preapply
              Web_services.election_login
              ((W.election.e_params.e_uuid, ()), None))
Stephane Glondu's avatar
Stephane Glondu committed
1122
      | Some u -> cont ())
1123

Stephane Glondu's avatar
Stephane Glondu committed
1124 1125 1126
let () =
  Any.register
    ~service:election_cast_confirm
1127
    (fun (uuid, ()) () ->
1128
      let uuid_s = Uuidm.to_string uuid in