Attention une mise à jour du serveur va être effectuée le vendredi 16 avril entre 12h et 12h30. Cette mise à jour va générer une interruption du service de quelques minutes.

web_site.ml 49.5 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
let source_file = ref "belenios.tar.gz"
Stephane Glondu's avatar
Stephane Glondu committed
33

34 35 36 37 38 39 40 41 42 43 44 45
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
    )

46 47
let ( / ) = Filename.concat

48 49 50 51 52 53 54 55
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
56
module PString = String
Stephane Glondu's avatar
Stephane Glondu committed
57

Stephane Glondu's avatar
Stephane Glondu committed
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
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

77 78
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
79
  let module D = struct
Stephane Glondu's avatar
Stephane Glondu committed
80
    include (val params : ELECTION_DATA)
81
    include (val web_params : WEB_PARAMS)
Stephane Glondu's avatar
Stephane Glondu committed
82
  end in
83 84
  (module D : WEB_ELECTION_DATA)

Stephane Glondu's avatar
Stephane Glondu committed
85
let raw_find_election uuid =
86 87
  lwt x = Ocsipersist.find election_ptable uuid in
  return (web_election_data x)
Stephane Glondu's avatar
Stephane Glondu committed
88

Stephane Glondu's avatar
Stephane Glondu committed
89 90 91 92 93 94 95 96 97 98 99
module WCacheTypes = struct
  type key = string
  type value = (module WEB_ELECTION_DATA)
end

module WCache = Ocsigen_cache.Make (WCacheTypes)

let find_election =
  let cache = new WCache.cache raw_find_election 100 in
  fun x -> cache#find x

Stephane Glondu's avatar
Stephane Glondu committed
100 101 102
(* Mutex to avoid simultaneous registrations of the same election *)
let registration_mutex = Lwt_mutex.create ()

103
let import_election f =
Stephane Glondu's avatar
Stephane Glondu committed
104 105 106 107 108 109 110 111 112
  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"
113
      )
Stephane Glondu's avatar
Stephane Glondu committed
114 115
    in
    let params = Group.election_params_of_string raw_election in
Stephane Glondu's avatar
Stephane Glondu committed
116 117
    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
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136
    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
137
      end in
Stephane Glondu's avatar
Stephane Glondu committed
138
      let web_params = (module X : WEB_PARAMS) in
139
      let module G = P.G in
Stephane Glondu's avatar
Stephane Glondu committed
140 141
      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
142
      let voters = Lwt_io.lines_of_file f.f_voters in
143 144 145 146 147
      lwt () =
        match_lwt Lwt_stream.peek voters with
        | Some _ -> return_unit
        | None -> Lwt.fail (Failure "No voters")
      in
148 149 150 151 152 153 154 155 156 157 158 159
      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
160 161 162 163 164 165 166
      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
167
      if not G.(P.election.e_params.e_public_key =~ KG.combine pks) then
Stephane Glondu's avatar
Stephane Glondu committed
168 169 170 171 172 173 174 175
        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 ()
176
        )
Stephane Glondu's avatar
Stephane Glondu committed
177 178 179 180 181 182 183 184 185 186 187
      ) 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
188 189 190
            Lwt_io.(with_file Output (dir/"voters.txt") (fun oc ->
              write_lines oc voters
            )) >>
191 192
            let election = web_election_data (raw_election, web_params) in
            let module W = Web_election.Make ((val election)) (LwtRandom) in
193
            lwt () =
194
              match W.D.metadata.e_auth_config with
195 196 197 198 199 200 201 202 203
              | 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
204 205 206 207 208 209 210 211 212 213
            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
214
            return (module W : WEB_ELECTION)
Stephane Glondu's avatar
Stephane Glondu committed
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
          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
230
    )
Stephane Glondu's avatar
Stephane Glondu committed
231 232 233 234 235 236
  with e ->
    Lwt_mutex.unlock registration_mutex;
    Lwt.fail e

let () = Any.register ~service:home
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
237
    Eliom_reference.unset Web_auth_state.cont >>
238
    T.home () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
239 240 241 242
  )

let () = Html5.register ~service:admin
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
243 244 245
    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
246
    lwt elections =
247
      match site_user with
248
      | None -> return None
Stephane Glondu's avatar
Stephane Glondu committed
249
      | Some u ->
250
         lwt elections, tallied =
251 252
           Ocsipersist.fold_step (fun uuid_s (_, web_params) accu ->
             let module W = (val web_params : WEB_PARAMS) in
253
             if W.metadata.e_owner = Some u then (
254
               lwt w = find_election uuid_s in
255
               lwt state = Web_persist.get_election_state uuid_s in
256
               lwt date = Web_persist.get_election_date uuid_s in
257
               let elections, tallied = accu in
258
               match state with
259 260
               | `Tallied _ -> return (elections, (date, w) :: tallied)
               | _ -> return ((date, w) :: elections, tallied)
261
             ) else (
262
               return accu
263
             )
264
           ) election_ptable ([], [])
265 266 267
         and setup_elections =
           Ocsipersist.fold_step (fun k v accu ->
             if v.se_owner = u
268
             then return ((uuid_of_string k, v.se_questions.t_name) :: accu)
269 270
             else return accu
           ) election_stable []
271 272 273 274 275 276 277
         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
278
    in
279
    T.admin ~elections ()
Stephane Glondu's avatar
Stephane Glondu committed
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295
  )

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)
296 297
    )

Stephane Glondu's avatar
Stephane Glondu committed
298 299 300 301 302 303 304 305 306 307 308 309 310
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
311
   match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
312 313 314 315 316 317
   | 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;
318
        e_auth_config = Some [{auth_system = "password"; auth_instance = "password"; auth_config = []}];
319
        e_cred_authority = None;
Stephane Glondu's avatar
Stephane Glondu committed
320 321
      } in
      let question = {
322 323
        q_answers = [| "Answer 1"; "Answer 2"; "Blank" |];
        q_min = 1;
Stephane Glondu's avatar
Stephane Glondu committed
324 325 326 327 328 329 330 331 332 333 334 335
        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
336
        se_voters = [];
Stephane Glondu's avatar
Stephane Glondu committed
337 338 339 340 341 342 343 344 345 346 347
        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 ()
  )

348 349 350 351 352 353 354 355 356 357
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
358
let () = Html5.register ~service:election_setup
359
  (generic_setup_page T.election_setup)
Stephane Glondu's avatar
Stephane Glondu committed
360

361
let () = Html5.register ~service:election_setup_trustees
362 363 364 365
  (generic_setup_page T.election_setup_trustees)

let () = Html5.register ~service:election_setup_credential_authority
  (generic_setup_page T.election_setup_credential_authority)
366

Stephane Glondu's avatar
Stephane Glondu committed
367 368
let election_setup_mutex = Lwt_mutex.create ()

369
let handle_setup f uuid x =
Stephane Glondu's avatar
Stephane Glondu committed
370
  match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
371 372 373 374 375 376
  | 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
377
           lwt cont = f se x u uuid in
Stephane Glondu's avatar
Stephane Glondu committed
378
           Ocsipersist.add election_stable uuid_s se >>
379
           cont ()
Stephane Glondu's avatar
Stephane Glondu committed
380
         with e ->
381
           T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
382 383 384
       ) else forbidden ()
     )
  | None -> forbidden ()
385

386 387
let redir_preapply s u () = Redirection.send (preapply s u)

388 389 390 391
let () =
  Any.register
    ~service:election_setup_description
    (handle_setup
392
       (fun se (name, description) _ uuid ->
393 394 395
         se.se_questions <- {se.se_questions with
           t_name = name;
           t_description = description;
396 397
         };
         return (redir_preapply election_setup uuid)))
398

Stephane Glondu's avatar
Stephane Glondu committed
399 400 401 402
let () =
  Any.register
    ~service:election_setup_group
    (handle_setup
403
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
404 405
        let _group = Group.of_string x in
        (* we keep it as a string since it contains a type *)
406 407
        se.se_group <- x;
        return (redir_preapply election_setup uuid)))
408

Stephane Glondu's avatar
Stephane Glondu committed
409 410 411 412
let () =
  Any.register
    ~service:election_setup_metadata
    (handle_setup
413
       (fun se x u uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
414 415
        let metadata = metadata_of_string x in
        if metadata.e_owner <> Some u then failwith "wrong owner";
416 417
        se.se_metadata <- metadata;
        return (redir_preapply election_setup uuid)))
418

419 420 421 422
let () =
  Any.register
    ~service:election_setup_auth
    (handle_setup
423 424
       (fun se auth_system _ uuid ->
         (match auth_system with
425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
         | 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)
444 445
         | None -> failwith "no authentication system was given");
         return (redir_preapply election_setup uuid)))
446 447 448 449 450

let () =
  Any.register
    ~service:election_setup_auth_cas
    (handle_setup
451
       (fun se server _ uuid ->
452 453 454 455 456 457 458
         se.se_metadata <- {
           se.se_metadata with
             e_auth_config = Some [{
               auth_system = "cas";
               auth_instance = "cas";
               auth_config = ["server", server];
             }]
459 460
         };
         return (redir_preapply election_setup uuid)))
461

462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
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"

484 485 486 487 488 489 490 491 492
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

493 494 495 496 497 498 499 500 501 502
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
503 504 505 506 507
         let title = se.se_questions.t_name in
         let url = Eliom_uri.make_string_uri
           ~absolute:true ~service:election_home
           (uuid, ()) |> rewrite_prefix
         in
508
         let table = Ocsipersist.open_table table in
509
         Lwt_list.iter_s (generate_password table title url) se.se_voters >>
510 511 512
         return (fun () ->
           T.generic_page ~title:"Success"
             "Passwords have been generated and mailed!" () >>= Html5.send)))
513

514 515 516
let () =
  Any.register
    ~service:election_regenpwd
517 518 519 520 521 522 523
    (fun (uuid, ()) user ->
      T.regenpwd uuid () >>= Html5.send)

let () =
  Any.register
    ~service:election_regenpwd_post
    (fun (uuid, ()) user ->
524
      let uuid_s = Uuidm.to_string uuid in
525 526
      lwt w = find_election uuid_s in
      let module W = (val w) in
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
      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
551 552 553 554
let () =
  Html5.register
    ~service:election_setup_questions
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
555
     match_lwt Web_auth_state.get_site_user () with
556 557
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
558 559
        lwt se = Ocsipersist.find election_stable uuid_s in
        if se.se_owner = u
560
        then T.election_setup_questions uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
561 562
        else forbidden ()
     | None -> forbidden ()
563 564
    )

Stephane Glondu's avatar
Stephane Glondu committed
565 566 567 568
let () =
  Any.register
    ~service:election_setup_questions_post
    (handle_setup
569 570 571
       (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
572

Stephane Glondu's avatar
Stephane Glondu committed
573 574 575 576
let () =
  Html5.register
    ~service:election_setup_voters
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
577
      match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
578 579 580 581
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
         lwt se = Ocsipersist.find election_stable uuid_s in
         if se.se_owner = u
582
         then T.election_setup_voters uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599
         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
600
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
601 602 603 604 605 606 607
         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
608 609
         se.se_voters <- xs;
         return (redir_preapply election_setup uuid)))
Stephane Glondu's avatar
Stephane Glondu committed
610

Stephane Glondu's avatar
Stephane Glondu committed
611 612 613
let () =
  Redirection.register
    ~service:election_setup_trustee_add
614
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
615
     match_lwt Web_auth_state.get_site_user () with
616 617
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
618 619 620 621 622 623 624 625 626 627
        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 ()
        ) >>
628
        return (preapply election_setup_trustees uuid)
629 630 631 632 633 634 635
     | None -> forbidden ()
    )

let () =
  Redirection.register
    ~service:election_setup_trustee_del
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
636
     match_lwt Web_auth_state.get_site_user () with
637 638 639 640 641 642 643 644 645 646 647 648 649 650
     | 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 ()
        ) >>
651
        return (preapply election_setup_trustees uuid)
652 653 654
     | None -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
655 656 657 658 659 660 661 662
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 ()
    )
663

Stephane Glondu's avatar
Stephane Glondu committed
664 665 666 667 668 669 670 671
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")
    )
672

Stephane Glondu's avatar
Stephane Glondu committed
673 674 675
let wrap_handler f =
  try_lwt f ()
  with
676
  | e -> T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702

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
703
  let () = se.se_metadata <- {se.se_metadata with e_cred_authority = None} in
704 705
  T.generic_page ~title:"Success"
    "Credentials have been received and checked!" () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
706 707 708 709 710 711 712

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))
713

Stephane Glondu's avatar
Stephane Glondu committed
714 715 716 717 718 719 720
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))

721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763
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

764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
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"

786 787 788
let () =
  Any.register
    ~service:election_setup_credentials_server
789
    (handle_setup (fun se () _ uuid ->
790 791 792
      let () = se.se_metadata <- {se.se_metadata with
        e_cred_authority = Some "server"
      } in
793
      let uuid_s = Uuidm.to_string uuid in
794 795 796 797 798
      let title = se.se_questions.t_name in
      let url = Eliom_uri.make_string_uri
        ~absolute:true ~service:election_home
        (uuid, ()) |> rewrite_prefix
      in
799 800 801 802 803 804 805 806 807 808 809 810
      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
811 812
          let body = Printf.sprintf template_credential title id cred url in
          let subject = "Your credential for election " ^ title in
813
          lwt () = send_email "noreply@belenios.org" id subject body in
814 815 816 817 818
          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
819
      lwt () =
820 821 822 823
          Lwt_io.with_file
            ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
            ~perm:0o600 ~mode:Lwt_io.Output fname
            (fun oc ->
824
              Lwt_list.iter_s (Lwt_io.write_line oc) creds)
825
      in
826 827 828
      return (fun () ->
        T.generic_page ~title:"Success"
          "Credentials have been generated and mailed!" () >>= Html5.send)))
829

Stephane Glondu's avatar
Stephane Glondu committed
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857
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
858 859 860
          ) >> T.generic_page ~title:"Success"
            "Your key has been received and checked!"
            () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
861 862 863 864 865 866 867
       )
    )

let () =
  Any.register
    ~service:election_setup_create
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
868
     match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
869 870 871
     | None -> forbidden ()
     | Some u ->
        begin try_lwt
872 873 874
          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
875 876 877
            if se.se_owner <> u then forbidden () else
            let group = Group.of_string se.se_group in
            let module G = (val group : GROUP) in
878
            let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
Stephane Glondu's avatar
Stephane Glondu committed
879
            (* construct election data in memory *)
880
            lwt public_keys, private_key =
Stephane Glondu's avatar
Stephane Glondu committed
881
              match se.se_public_keys with
882 883 884 885 886 887 888 889 890
              | [] ->
                 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
891 892 893 894 895 896
            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;
897
              e_public_key = {wpk_group = G.group; wpk_y = y};
Stephane Glondu's avatar
Stephane Glondu committed
898 899 900 901 902 903 904 905 906
              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
907
              f_voters = !spool_dir / uuid_s ^ ".voters.txt";
Stephane Glondu's avatar
Stephane Glondu committed
908 909 910 911 912 913
            } in
            lwt _ =
              try_lwt Lwt_unix.stat files.f_public_creds
              with _ -> failwith "public credentials are missing"
            in
            (* write election files to disk *)
914
            let create_file fname what xs =
Stephane Glondu's avatar
Stephane Glondu committed
915 916 917
              Lwt_io.with_file
                ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
                ~perm:0o600 ~mode:Lwt_io.Output fname
918 919 920 921 922
                (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
923
            in
924 925 926 927
            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
928 929 930
            (* actually create the election *)
            begin match_lwt import_election files with
            | None ->
931
               T.new_election_failure `Exists () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
932 933 934 935
            | Some w ->
               let module W = (val w : REGISTRABLE_ELECTION) in
               lwt w = W.register () in
               let module W = (val w : WEB_ELECTION) in
936 937 938 939 940
               (* create file with private key, if any *)
               lwt () =
                 match private_key with
                 | None -> return ()
                 | Some x ->
941
                    let fname = W.D.dir / "private_key.json" in
942
                    create_file fname string_of_number [x]
943
               in
Stephane Glondu's avatar
Stephane Glondu committed
944 945 946 947 948
               (* 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
949
               Lwt_unix.unlink files.f_voters >>
Stephane Glondu's avatar
Stephane Glondu committed
950 951 952 953 954 955 956
               (* 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 >>
957
               Web_persist.set_election_date uuid_s (now ()) >>
Stephane Glondu's avatar
Stephane Glondu committed
958
               Redirection.send
959
                 (preapply election_admin (W.D.election.e_params.e_uuid, ()))
Stephane Glondu's avatar
Stephane Glondu committed
960 961 962
            end
          )
        with e ->
963
          T.new_election_failure (`Exception e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
964 965
        end
    )
966

Stephane Glondu's avatar
Stephane Glondu committed
967 968 969 970
let () =
  Any.register
    ~service:election_home
    (fun (uuid, ()) () ->
971
      let uuid_s = Uuidm.to_string uuid in
972 973 974
      try_lwt
        lwt w = find_election uuid_s in
        let module W = (val w) in
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989
        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
990
        T.generic_page ~title:"Sorry, this election is not yet open"
991 992
          "This election does not exist yet. Please come back later." ()
          >>= Html5.send)
993

Stephane Glondu's avatar
Stephane Glondu committed
994 995 996 997 998
let () =
  Any.register
    ~service:election_admin
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
999
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1000
     lwt site_user = Web_auth_state.get_site_user () in
1001
     let module W = (val w) in
1002 1003 1004 1005
     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
1006
        T.election_admin (module W) state () >>= Html5.send
1007 1008
       | _ -> forbidden ()
    )
1009

1010
let election_set_state state (uuid, ()) () =
Stephane Glondu's avatar
Stephane Glondu committed
1011
     let uuid_s = Uuidm.to_string uuid in
1012 1013
     lwt w = find_election uuid_s in
     let module W = (val w) in
1014
     lwt () =
Stephane Glondu's avatar
Stephane Glondu committed
1015
       match_lwt Web_auth_state.get_site_user () with
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
       | 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 >>
1026 1027 1028 1029
     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)
1030

Stephane Glondu's avatar
Stephane Glondu committed
1031 1032 1033 1034 1035
let () =
  Any.register
    ~service:election_update_credential
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
1036
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1037
     lwt site_user = Web_auth_state.get_site_user () in
1038
     let module W = (val w) in
1039 1040 1041
     match site_user with
     | Some u ->
        if W.metadata.e_owner = Some u then (
1042
          T.update_credential (module W) () >>= Html5.send
1043 1044 1045 1046
        ) else (
          forbidden ()
        )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1047 1048 1049 1050

let () =
  Any.register
    ~service:election_update_credential_post
1051
    (fun (uuid, ()) (old, new_) ->
Stephane Glondu's avatar
Stephane Glondu committed
1052
     let uuid_s = Uuidm.to_string uuid in
1053
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1054
     lwt site_user = Web_auth_state.get_site_user () in
1055
     let module W = Web_election.Make ((val w)) (LwtRandom) in
1056 1057
     let module B = W.B in
     let module W = W.D in
1058 1059 1060 1061
     match site_user with
     | Some u ->
       if W.metadata.e_owner = Some u then (
         try_lwt
1062
           B.update_cred ~old ~new_ >>
1063 1064 1065 1066 1067 1068 1069 1070
           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
1071 1072 1073 1074

let () =
  Any.register
    ~service:election_vote
1075
    (fun (uuid, ()) () ->
1076
      let uuid_s = Uuidm.to_string uuid in
1077 1078
      lwt w = find_election uuid_s in
      let module W = (val w) in
1079 1080 1081 1082 1083 1084 1085
      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 ^ "/")))
1086

Stephane Glondu's avatar
Stephane Glondu committed
1087 1088 1089
let () =
  Any.register
    ~service:election_cast
1090
    (fun (uuid, ()) () ->
1091
      let uuid_s = Uuidm.to_string uuid in
1092 1093
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1094
      let cont () =
1095 1096 1097 1098
        Redirection.send
          (Eliom_service.preapply
             election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1099
      Eliom_reference.set Web_auth_state.cont [cont] >>
1100
      match_lwt Eliom_reference.get Web_services.ballot with
1101 1102
      | 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
1103 1104 1105 1106

let () =
  Any.register
    ~service:election_cast_post
1107 1108
    (fun (uuid, ()) (ballot_raw, ballot_file) ->
      let uuid_s = Uuidm.to_string uuid in
1109 1110
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1111
      lwt user = Web_auth_state.get_election_user uuid in
1112 1113 1114 1115 1116 1117 1118
      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
1119
      let cont () =
1120 1121 1122 1123
        Redirection.send
          (Eliom_service.preapply
             Web_services.election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1124
      Eliom_reference.set Web_auth_state.cont [cont] >>
1125 1126 1127 1128 1129 1130 1131
      Eliom_reference.set Web_services.ballot (Some the_ballot) >>