web_site.ml 49.4 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 81 82 83 84 85 86
  let module P = (val params : ELECTION_PARAMS) in
  let module D = struct
    module G = P.G
    let election = {
      e_params = P.params;
      e_fingerprint = P.fingerprint;
    }
87
    include (val web_params : WEB_PARAMS)
Stephane Glondu's avatar
Stephane Glondu committed
88
  end in
89 90 91 92 93
  (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
94 95 96 97

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

98
let import_election f =
Stephane Glondu's avatar
Stephane Glondu committed
99 100 101 102 103 104 105 106 107
  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"
108
      )
Stephane Glondu's avatar
Stephane Glondu committed
109 110
    in
    let params = Group.election_params_of_string raw_election in
111 112
    let module P = (val params : ELECTION_PARAMS) in
    let uuid = Uuidm.to_string P.params.e_uuid in
Stephane Glondu's avatar
Stephane Glondu committed
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
    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
132
      end in
Stephane Glondu's avatar
Stephane Glondu committed
133
      let web_params = (module X : WEB_PARAMS) in
134
      let module G = P.G in
Stephane Glondu's avatar
Stephane Glondu committed
135 136
      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
137
      let voters = Lwt_io.lines_of_file f.f_voters in
138 139 140 141 142
      lwt () =
        match_lwt Lwt_stream.peek voters with
        | Some _ -> return_unit
        | None -> Lwt.fail (Failure "No voters")
      in
143 144 145 146 147 148 149 150 151 152 153 154
      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
155 156 157 158 159 160 161
      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.";
162
      if not G.(P.params.e_public_key =~ KG.combine pks) then
Stephane Glondu's avatar
Stephane Glondu committed
163 164 165 166 167 168 169 170
        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 ()
171
        )
Stephane Glondu's avatar
Stephane Glondu committed
172 173 174 175 176 177 178 179 180 181 182
      ) 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
183 184 185
            Lwt_io.(with_file Output (dir/"voters.txt") (fun oc ->
              write_lines oc voters
            )) >>
186 187
            let election = web_election_data (raw_election, web_params) in
            let module W = Web_election.Make ((val election)) (LwtRandom) in
188
            lwt () =
189
              match W.D.metadata.e_auth_config with
190 191 192 193 194 195 196 197 198
              | 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
199 200 201 202 203 204 205 206 207 208
            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
209
            return (module W : WEB_ELECTION)
Stephane Glondu's avatar
Stephane Glondu committed
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224
          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
225
    )
Stephane Glondu's avatar
Stephane Glondu committed
226 227 228 229 230 231
  with e ->
    Lwt_mutex.unlock registration_mutex;
    Lwt.fail e

let () = Any.register ~service:home
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
232
    Eliom_reference.unset Web_auth_state.cont >>
233
    T.home () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
234 235 236 237
  )

let () = Html5.register ~service:admin
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
238 239 240
    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
241
    lwt elections =
242
      match site_user with
243
      | None -> return None
Stephane Glondu's avatar
Stephane Glondu committed
244
      | Some u ->
245
         lwt elections, tallied =
246 247
           Ocsipersist.fold_step (fun uuid_s (_, web_params) accu ->
             let module W = (val web_params : WEB_PARAMS) in
248
             if W.metadata.e_owner = Some u then (
249
               lwt w = find_election uuid_s in
250
               lwt state = Web_persist.get_election_state uuid_s in
251
               lwt date = Web_persist.get_election_date uuid_s in
252
               let elections, tallied = accu in
253
               match state with
254 255
               | `Tallied _ -> return (elections, (date, w) :: tallied)
               | _ -> return ((date, w) :: elections, tallied)
256
             ) else (
257
               return accu
258
             )
259
           ) election_ptable ([], [])
260 261 262
         and setup_elections =
           Ocsipersist.fold_step (fun k v accu ->
             if v.se_owner = u
263
             then return ((uuid_of_string k, v.se_questions.t_name) :: accu)
264 265
             else return accu
           ) election_stable []
266 267 268 269 270 271 272
         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
273
    in
274
    T.admin ~elections ()
Stephane Glondu's avatar
Stephane Glondu committed
275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
  )

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)
291 292
    )

Stephane Glondu's avatar
Stephane Glondu committed
293 294 295 296 297 298 299 300 301 302 303 304 305
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
306
   match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
307 308 309 310 311 312
   | 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;
313
        e_auth_config = Some [{auth_system = "password"; auth_instance = "password"; auth_config = []}];
314
        e_cred_authority = None;
Stephane Glondu's avatar
Stephane Glondu committed
315 316
      } in
      let question = {
317 318
        q_answers = [| "Answer 1"; "Answer 2"; "Blank" |];
        q_min = 1;
Stephane Glondu's avatar
Stephane Glondu committed
319 320 321 322 323 324 325 326 327 328 329 330
        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
331
        se_voters = [];
Stephane Glondu's avatar
Stephane Glondu committed
332 333 334 335 336 337 338 339 340 341 342
        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 ()
  )

343 344 345 346 347 348 349 350 351 352
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
353
let () = Html5.register ~service:election_setup
354
  (generic_setup_page T.election_setup)
Stephane Glondu's avatar
Stephane Glondu committed
355

356
let () = Html5.register ~service:election_setup_trustees
357 358 359 360
  (generic_setup_page T.election_setup_trustees)

let () = Html5.register ~service:election_setup_credential_authority
  (generic_setup_page T.election_setup_credential_authority)
361

Stephane Glondu's avatar
Stephane Glondu committed
362 363
let election_setup_mutex = Lwt_mutex.create ()

364
let handle_setup f uuid x =
Stephane Glondu's avatar
Stephane Glondu committed
365
  match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
366 367 368 369 370 371
  | 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
372
           lwt cont = f se x u uuid in
Stephane Glondu's avatar
Stephane Glondu committed
373
           Ocsipersist.add election_stable uuid_s se >>
374
           cont ()
Stephane Glondu's avatar
Stephane Glondu committed
375
         with e ->
376
           T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
377 378 379
       ) else forbidden ()
     )
  | None -> forbidden ()
380

381 382
let redir_preapply s u () = Redirection.send (preapply s u)

383 384 385 386
let () =
  Any.register
    ~service:election_setup_description
    (handle_setup
387
       (fun se (name, description) _ uuid ->
388 389 390
         se.se_questions <- {se.se_questions with
           t_name = name;
           t_description = description;
391 392
         };
         return (redir_preapply election_setup uuid)))
393

Stephane Glondu's avatar
Stephane Glondu committed
394 395 396 397
let () =
  Any.register
    ~service:election_setup_group
    (handle_setup
398
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
399 400
        let _group = Group.of_string x in
        (* we keep it as a string since it contains a type *)
401 402
        se.se_group <- x;
        return (redir_preapply election_setup uuid)))
403

Stephane Glondu's avatar
Stephane Glondu committed
404 405 406 407
let () =
  Any.register
    ~service:election_setup_metadata
    (handle_setup
408
       (fun se x u uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
409 410
        let metadata = metadata_of_string x in
        if metadata.e_owner <> Some u then failwith "wrong owner";
411 412
        se.se_metadata <- metadata;
        return (redir_preapply election_setup uuid)))
413

414 415 416 417
let () =
  Any.register
    ~service:election_setup_auth
    (handle_setup
418 419
       (fun se auth_system _ uuid ->
         (match auth_system with
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438
         | 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)
439 440
         | None -> failwith "no authentication system was given");
         return (redir_preapply election_setup uuid)))
441 442 443 444 445

let () =
  Any.register
    ~service:election_setup_auth_cas
    (handle_setup
446
       (fun se server _ uuid ->
447 448 449 450 451 452 453
         se.se_metadata <- {
           se.se_metadata with
             e_auth_config = Some [{
               auth_system = "cas";
               auth_instance = "cas";
               auth_config = ["server", server];
             }]
454 455
         };
         return (redir_preapply election_setup uuid)))
456

457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
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"

479 480 481 482 483 484 485 486 487
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

488 489 490 491 492 493 494 495 496 497
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
498 499 500 501 502
         let title = se.se_questions.t_name in
         let url = Eliom_uri.make_string_uri
           ~absolute:true ~service:election_home
           (uuid, ()) |> rewrite_prefix
         in
503
         let table = Ocsipersist.open_table table in
504
         Lwt_list.iter_s (generate_password table title url) se.se_voters >>
505 506 507
         return (fun () ->
           T.generic_page ~title:"Success"
             "Passwords have been generated and mailed!" () >>= Html5.send)))
508

509 510 511
let () =
  Any.register
    ~service:election_regenpwd
512 513 514 515 516 517 518
    (fun (uuid, ()) user ->
      T.regenpwd uuid () >>= Html5.send)

let () =
  Any.register
    ~service:election_regenpwd_post
    (fun (uuid, ()) user ->
519
      let uuid_s = Uuidm.to_string uuid in
520 521
      lwt w = find_election uuid_s in
      let module W = (val w) in
522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545
      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
546 547 548 549
let () =
  Html5.register
    ~service:election_setup_questions
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
550
     match_lwt Web_auth_state.get_site_user () with
551 552
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
553 554
        lwt se = Ocsipersist.find election_stable uuid_s in
        if se.se_owner = u
555
        then T.election_setup_questions uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
556 557
        else forbidden ()
     | None -> forbidden ()
558 559
    )

Stephane Glondu's avatar
Stephane Glondu committed
560 561 562 563
let () =
  Any.register
    ~service:election_setup_questions_post
    (handle_setup
564 565 566
       (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
567

Stephane Glondu's avatar
Stephane Glondu committed
568 569 570 571
let () =
  Html5.register
    ~service:election_setup_voters
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
572
      match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
573 574 575 576
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
         lwt se = Ocsipersist.find election_stable uuid_s in
         if se.se_owner = u
577
         then T.election_setup_voters uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
         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
595
       (fun se x _ uuid ->
Stephane Glondu's avatar
Stephane Glondu committed
596 597 598 599 600 601 602
         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
603 604
         se.se_voters <- xs;
         return (redir_preapply election_setup uuid)))
Stephane Glondu's avatar
Stephane Glondu committed
605

Stephane Glondu's avatar
Stephane Glondu committed
606 607 608
let () =
  Redirection.register
    ~service:election_setup_trustee_add
609
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
610
     match_lwt Web_auth_state.get_site_user () with
611 612
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
613 614 615 616 617 618 619 620 621 622
        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 ()
        ) >>
623
        return (preapply election_setup_trustees uuid)
624 625 626 627 628 629 630
     | None -> forbidden ()
    )

let () =
  Redirection.register
    ~service:election_setup_trustee_del
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
631
     match_lwt Web_auth_state.get_site_user () with
632 633 634 635 636 637 638 639 640 641 642 643 644 645
     | 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 ()
        ) >>
646
        return (preapply election_setup_trustees uuid)
647 648 649
     | None -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
650 651 652 653 654 655 656 657
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 ()
    )
658

Stephane Glondu's avatar
Stephane Glondu committed
659 660 661 662 663 664 665 666
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")
    )
667

Stephane Glondu's avatar
Stephane Glondu committed
668 669 670
let wrap_handler f =
  try_lwt f ()
  with
671
  | e -> T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697

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
698
  let () = se.se_metadata <- {se.se_metadata with e_cred_authority = None} in
699 700
  T.generic_page ~title:"Success"
    "Credentials have been received and checked!" () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
701 702 703 704 705 706 707

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))
708

Stephane Glondu's avatar
Stephane Glondu committed
709 710 711 712 713 714 715
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))

716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
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

759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780
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"

781 782 783
let () =
  Any.register
    ~service:election_setup_credentials_server
784
    (handle_setup (fun se () _ uuid ->
785 786 787
      let () = se.se_metadata <- {se.se_metadata with
        e_cred_authority = Some "server"
      } in
788
      let uuid_s = Uuidm.to_string uuid in
789 790 791 792 793
      let title = se.se_questions.t_name in
      let url = Eliom_uri.make_string_uri
        ~absolute:true ~service:election_home
        (uuid, ()) |> rewrite_prefix
      in
794 795 796 797 798 799 800 801 802 803 804 805
      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
806 807
          let body = Printf.sprintf template_credential title id cred url in
          let subject = "Your credential for election " ^ title in
808
          lwt () = send_email "noreply@belenios.org" id subject body in
809 810 811 812 813
          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
814
      lwt () =
815 816 817 818
          Lwt_io.with_file
            ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
            ~perm:0o600 ~mode:Lwt_io.Output fname
            (fun oc ->
819
              Lwt_list.iter_s (Lwt_io.write_line oc) creds)
820
      in
821 822 823
      return (fun () ->
        T.generic_page ~title:"Success"
          "Credentials have been generated and mailed!" () >>= Html5.send)))
824

Stephane Glondu's avatar
Stephane Glondu committed
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852
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
853 854 855
          ) >> T.generic_page ~title:"Success"
            "Your key has been received and checked!"
            () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
856 857 858 859 860 861 862
       )
    )

let () =
  Any.register
    ~service:election_setup_create
    (fun uuid () ->
Stephane Glondu's avatar
Stephane Glondu committed
863
     match_lwt Web_auth_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
864 865 866
     | None -> forbidden ()
     | Some u ->
        begin try_lwt
867 868 869
          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
870 871 872
            if se.se_owner <> u then forbidden () else
            let group = Group.of_string se.se_group in
            let module G = (val group : GROUP) in
873
            let module KG = Election.MakeSimpleDistKeyGen (G) (LwtRandom) in
Stephane Glondu's avatar
Stephane Glondu committed
874
            (* construct election data in memory *)
875
            lwt public_keys, private_key =
Stephane Glondu's avatar
Stephane Glondu committed
876
              match se.se_public_keys with
877 878 879 880 881 882 883 884 885
              | [] ->
                 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
886 887 888 889 890 891
            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;
892
              e_public_key = {wpk_group = G.group; wpk_y = y};
Stephane Glondu's avatar
Stephane Glondu committed
893 894 895 896 897 898 899 900 901
              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
902
              f_voters = !spool_dir / uuid_s ^ ".voters.txt";
Stephane Glondu's avatar
Stephane Glondu committed
903 904 905 906 907 908
            } in
            lwt _ =
              try_lwt Lwt_unix.stat files.f_public_creds
              with _ -> failwith "public credentials are missing"
            in
            (* write election files to disk *)
909
            let create_file fname what xs =
Stephane Glondu's avatar
Stephane Glondu committed
910 911 912
              Lwt_io.with_file
                ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
                ~perm:0o600 ~mode:Lwt_io.Output fname
913 914 915 916 917
                (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
918
            in
919 920 921 922
            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
923 924 925
            (* actually create the election *)
            begin match_lwt import_election files with
            | None ->
926
               T.new_election_failure `Exists () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
927 928 929 930
            | Some w ->
               let module W = (val w : REGISTRABLE_ELECTION) in
               lwt w = W.register () in
               let module W = (val w : WEB_ELECTION) in
931 932 933 934 935
               (* create file with private key, if any *)
               lwt () =
                 match private_key with
                 | None -> return ()
                 | Some x ->
936
                    let fname = W.D.dir / "private_key.json" in
937
                    create_file fname string_of_number [x]
938
               in
Stephane Glondu's avatar
Stephane Glondu committed
939 940 941 942 943
               (* 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
944
               Lwt_unix.unlink files.f_voters >>
Stephane Glondu's avatar
Stephane Glondu committed
945 946 947 948 949 950 951
               (* 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 >>
952
               Web_persist.set_election_date uuid_s (now ()) >>
Stephane Glondu's avatar
Stephane Glondu committed
953
               Redirection.send
954
                 (preapply election_admin (W.D.election.e_params.e_uuid, ()))
Stephane Glondu's avatar
Stephane Glondu committed
955 956 957
            end
          )
        with e ->
958
          T.new_election_failure (`Exception e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
959 960
        end
    )
961

Stephane Glondu's avatar
Stephane Glondu committed
962 963 964 965
let () =
  Any.register
    ~service:election_home
    (fun (uuid, ()) () ->
966
      let uuid_s = Uuidm.to_string uuid in
967 968 969
      try_lwt
        lwt w = find_election uuid_s in
        let module W = (val w) in
970 971 972 973 974 975 976 977 978 979 980 981 982 983 984
        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
985
        T.generic_page ~title:"Sorry, this election is not yet open"
986 987
          "This election does not exist yet. Please come back later." ()
          >>= Html5.send)
988

Stephane Glondu's avatar
Stephane Glondu committed
989 990 991 992 993
let () =
  Any.register
    ~service:election_admin
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
994
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
995
     lwt site_user = Web_auth_state.get_site_user () in
996
     let module W = (val w) in
997 998 999 1000
     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
1001
        T.election_admin (module W) state () >>= Html5.send
1002 1003
       | _ -> forbidden ()
    )
1004

1005
let election_set_state state (uuid, ()) () =
Stephane Glondu's avatar
Stephane Glondu committed
1006
     let uuid_s = Uuidm.to_string uuid in
1007 1008
     lwt w = find_election uuid_s in
     let module W = (val w) in
1009
     lwt () =
Stephane Glondu's avatar
Stephane Glondu committed
1010
       match_lwt Web_auth_state.get_site_user () with
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
       | 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 >>
1021 1022 1023 1024
     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)
1025

Stephane Glondu's avatar
Stephane Glondu committed
1026 1027 1028 1029 1030
let () =
  Any.register
    ~service:election_update_credential
    (fun (uuid, ()) () ->
     let uuid_s = Uuidm.to_string uuid in
1031
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1032
     lwt site_user = Web_auth_state.get_site_user () in
1033
     let module W = (val w) in
1034 1035 1036
     match site_user with
     | Some u ->
        if W.metadata.e_owner = Some u then (
1037
          T.update_credential (module W) () >>= Html5.send
1038 1039 1040 1041
        ) else (
          forbidden ()
        )
     | _ -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
1042 1043 1044 1045

let () =
  Any.register
    ~service:election_update_credential_post
1046
    (fun (uuid, ()) (old, new_) ->
Stephane Glondu's avatar
Stephane Glondu committed
1047
     let uuid_s = Uuidm.to_string uuid in
1048
     lwt w = find_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
1049
     lwt site_user = Web_auth_state.get_site_user () in
1050
     let module W = Web_election.Make ((val w)) (LwtRandom) in
1051 1052
     let module B = W.B in
     let module W = W.D in
1053 1054 1055 1056
     match site_user with
     | Some u ->
       if W.metadata.e_owner = Some u then (
         try_lwt
1057
           B.update_cred ~old ~new_ >>
1058 1059 1060 1061 1062 1063 1064 1065
           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
1066 1067 1068 1069

let () =
  Any.register
    ~service:election_vote
1070
    (fun (uuid, ()) () ->
1071
      let uuid_s = Uuidm.to_string uuid in
1072 1073
      lwt w = find_election uuid_s in
      let module W = (val w) in
1074 1075 1076 1077 1078 1079 1080
      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 ^ "/")))
1081

Stephane Glondu's avatar
Stephane Glondu committed
1082 1083 1084
let () =
  Any.register
    ~service:election_cast
1085
    (fun (uuid, ()) () ->
1086
      let uuid_s = Uuidm.to_string uuid in
1087 1088
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1089
      let cont () =
1090 1091 1092 1093
        Redirection.send
          (Eliom_service.preapply
             election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1094
      Eliom_reference.set Web_auth_state.cont [cont] >>
1095
      match_lwt Eliom_reference.get Web_services.ballot with
1096 1097
      | 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
1098 1099 1100 1101

let () =
  Any.register
    ~service:election_cast_post
1102 1103
    (fun (uuid, ()) (ballot_raw, ballot_file) ->
      let uuid_s = Uuidm.to_string uuid in
1104 1105
      lwt w = find_election uuid_s in
      let module W = (val w) in
Stephane Glondu's avatar
Stephane Glondu committed
1106
      lwt user = Web_auth_state.get_election_user uuid in
1107 1108 1109 1110 1111 1112 1113
      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
1114
      let cont () =
1115 1116 1117 1118
        Redirection.send
          (Eliom_service.preapply
             Web_services.election_cast (W.election.e_params.e_uuid, ()))
      in
Stephane Glondu's avatar
Stephane Glondu committed
1119
      Eliom_reference.set Web_auth_state.cont [cont] >>
1120 1121 1122 1123 1124 1125 1126
      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
1127
      | Some u -> cont ())
1128

Stephane Glondu's avatar
Stephane Glondu committed
1129 1130 1131
let () =
  Any.register
    ~service:election_cast_confirm
1132
    (fun (uuid, ()) () ->
Stephane Glondu's avatar