web_site.ml 53.9 KB
Newer Older
Stephane Glondu's avatar
Stephane Glondu committed
1 2 3
(**************************************************************************)
(*                                BELENIOS                                *)
(*                                                                        *)
Stephane Glondu's avatar
Stephane Glondu committed
4
(*  Copyright © 2012-2016 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
27
open Web_serializable_builtin_t
Stephane Glondu's avatar
Stephane Glondu committed
28
open Web_serializable_j
29
open Web_common
30
open Web_services
Stephane Glondu's avatar
Stephane Glondu committed
31

32
let source_file = ref "belenios.tar.gz"
33
let maxmailsatonce = ref 1000
Stephane Glondu's avatar
Stephane Glondu committed
34

35 36
let ( / ) = Filename.concat

Stephane Glondu's avatar
Stephane Glondu committed
37
module PString = String
Stephane Glondu's avatar
Stephane Glondu committed
38

Stephane Glondu's avatar
Stephane Glondu committed
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
open Eliom_service
open Eliom_registration

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

(* 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

Stephane Glondu's avatar
Stephane Glondu committed
55
let raw_find_election uuid =
56
  let%lwt raw_election = Web_persist.get_raw_election uuid in
57 58 59 60
  match raw_election with
  | Some raw_election ->
     return (Group.election_params_of_string raw_election)
  | _ -> Lwt.fail Not_found
Stephane Glondu's avatar
Stephane Glondu committed
61

Stephane Glondu's avatar
Stephane Glondu committed
62 63
module WCacheTypes = struct
  type key = string
64
  type value = (module ELECTION_DATA)
Stephane Glondu's avatar
Stephane Glondu committed
65 66 67 68 69 70 71 72
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

73
let get_setup_election uuid_s =
74
  let%lwt se = Ocsipersist.find election_stable uuid_s in
75
  return (setup_election_of_string se)
76 77

let set_setup_election uuid_s se =
78
  Ocsipersist.add election_stable uuid_s (string_of_setup_election se)
79

Stephane Glondu's avatar
Stephane Glondu committed
80
let dump_passwords dir table =
Stephane Glondu's avatar
Stephane Glondu committed
81 82 83 84 85 86
  Lwt_io.(with_file Output (dir / "passwords.csv") (fun oc ->
    Ocsipersist.iter_step (fun voter (salt, hashed) ->
      write_line oc (voter ^ "," ^ salt ^ "," ^ hashed)
    ) table
  ))

87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108
let finalize_election uuid se =
  let uuid_s = Uuidm.to_string uuid in
  (* voters *)
  let () =
    if se.se_voters = [] then failwith "no voters"
  in
  (* passwords *)
  let () =
    match se.se_metadata.e_auth_config with
    | Some [{auth_system = "password"; _}] ->
       if not @@ List.for_all (fun v -> v.sv_password <> None) se.se_voters then
         failwith "some passwords are missing"
    | _ -> ()
  in
  (* credentials *)
  let () =
    if not se.se_public_creds_received then
      failwith "public credentials are missing"
  in
  (* trustees *)
  let group = Group.of_string se.se_group in
  let module G = (val group : GROUP) in
109
  let module KG = Trustees.MakeSimpleDistKeyGen (G) (LwtRandom) in
110
  let%lwt trustees, public_keys, private_key =
111 112
    match se.se_public_keys with
    | [] ->
113
       let%lwt private_key, public_key = KG.generate_and_prove () in
114
       return (None, [public_key], Some private_key)
115
    | _ :: _ ->
116 117 118
       return (
         Some (List.map (fun {st_id; _} -> st_id) se.se_public_keys),
         (List.map
119 120 121
            (fun {st_public_key; _} ->
              if st_public_key = "" then failwith "some public keys are missing";
              trustee_public_key_of_string G.read st_public_key
122 123
            ) se.se_public_keys),
         None)
124 125 126
  in
  let y = KG.combine (Array.of_list public_keys) in
  (* election parameters *)
127
  let metadata = { se.se_metadata with e_trustees = trustees } in
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
  let template = se.se_questions in
  let params = {
    e_description = template.t_description;
    e_name = template.t_name;
    e_public_key = {wpk_group = G.group; wpk_y = y};
    e_questions = template.t_questions;
    e_uuid = uuid;
  } in
  let raw_election = string_of_params (write_wrapped_pubkey G.write_group G.write) params in
  (* write election files to disk *)
  let dir = !spool_dir / uuid_s in
  let create_file fname what xs =
    Lwt_io.with_file
      ~flags:(Unix.([O_WRONLY; O_NONBLOCK; O_CREAT; O_TRUNC]))
      ~perm:0o600 ~mode:Lwt_io.Output (dir / fname)
      (fun oc ->
        Lwt_list.iter_s
          (fun v ->
            Lwt_io.write oc (what v) >>
              Lwt_io.write oc "\n") xs)
  in
  Lwt_unix.mkdir dir 0o700 >>
  create_file "public_keys.jsons" (string_of_trustee_public_key G.write) public_keys >>
  create_file "voters.txt" (fun x -> x.sv_id) se.se_voters >>
152
  create_file "metadata.json" string_of_metadata [metadata] >>
153 154
  create_file "election.json" (fun x -> x) [raw_election] >>
  (* construct Web_election instance *)
155
  let election = Group.election_params_of_string raw_election in
156 157
  let module W = Web_election.Make ((val election)) (LwtRandom) in
  (* set up authentication *)
158
  let%lwt () =
159
    match metadata.e_auth_config with
160 161 162 163 164 165 166 167 168 169
    | 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_s auth_config
  in
  (* inject credentials *)
170
  let%lwt () =
171 172 173 174 175 176 177
    let fname = !spool_dir / uuid_s ^ ".public_creds.txt" in
    Lwt_io.lines_of_file fname |>
    Lwt_stream.iter_s W.B.inject_cred >>
    W.B.update_files () >>
    Lwt_unix.unlink fname
  in
  (* create file with private key, if any *)
178
  let%lwt () =
179 180 181 182 183 184 185
    match private_key with
    | None -> return_unit
    | Some x -> create_file "private_key.json" string_of_number [x]
  in
  (* clean up setup database *)
  Ocsipersist.remove election_credtokens se.se_public_creds >>
  Lwt_list.iter_s
186 187
    (fun {st_token; _} ->
      Ocsipersist.remove election_pktokens st_token)
188 189 190
    se.se_public_keys >>
  Ocsipersist.remove election_stable uuid_s >>
  (* inject passwords *)
191
  (match metadata.e_auth_config with
192 193 194 195 196 197 198 199 200 201
  | Some [{auth_system = "password"; _}] ->
     let table = "password_" ^ underscorize uuid_s in
     let table = Ocsipersist.open_table table in
     Lwt_list.iter_s
       (fun v ->
         let _, login = split_identity v.sv_id in
         match v.sv_password with
         | Some x -> Ocsipersist.add table login x
         | None -> return_unit
       ) se.se_voters >>
202
       dump_passwords (!spool_dir / uuid_s) table
203 204
  | _ -> return_unit) >>
  (* finish *)
Stephane Glondu's avatar
Stephane Glondu committed
205
  Web_persist.set_election_state uuid_s `Open >>
206
  Web_persist.set_election_date uuid_s (now ())
Stephane Glondu's avatar
Stephane Glondu committed
207

Stephane Glondu's avatar
Stephane Glondu committed
208 209 210 211
let cleanup_table ?uuid_s table =
  let table = Ocsipersist.open_table table in
  match uuid_s with
  | None ->
212
     let%lwt indexes = Ocsipersist.fold_step (fun k _ accu ->
Stephane Glondu's avatar
Stephane Glondu committed
213 214 215 216 217 218
       return (k :: accu)) table []
     in
     Lwt_list.iter_s (Ocsipersist.remove table) indexes
  | Some u -> Ocsipersist.remove table u

let cleanup_file f =
219
  try%lwt Lwt_unix.unlink f
Stephane Glondu's avatar
Stephane Glondu committed
220 221 222 223
  with _ -> return_unit

let archive_election uuid_s =
  let uuid_u = underscorize uuid_s in
224 225 226 227 228 229 230 231
  let%lwt () = cleanup_table ~uuid_s "election_states" in
  let%lwt () = cleanup_table ~uuid_s "election_pds" in
  let%lwt () = cleanup_table ~uuid_s "auth_configs" in
  let%lwt () = cleanup_table ("password_" ^ uuid_u) in
  let%lwt () = cleanup_table ("records_" ^ uuid_u) in
  let%lwt () = cleanup_table ("creds_" ^ uuid_u) in
  let%lwt () = cleanup_table ("ballots_" ^ uuid_u) in
  let%lwt () = cleanup_file (!spool_dir / uuid_s / "private_key.json") in
Stephane Glondu's avatar
Stephane Glondu committed
232 233
  return_unit

Stephane Glondu's avatar
Stephane Glondu committed
234 235
let () = Any.register ~service:home
  (fun () () ->
236
    Eliom_reference.unset Web_state.cont >>
237
    Redirection.send admin
Stephane Glondu's avatar
Stephane Glondu committed
238 239
  )

240
let get_finalized_elections_by_owner u =
241
  let%lwt elections, tallied, archived =
242 243
    Web_persist.get_elections_by_owner u >>=
    Lwt_list.fold_left_s (fun accu uuid_s ->
244 245 246
        let%lwt w = find_election uuid_s in
        let%lwt state = Web_persist.get_election_state uuid_s in
        let%lwt date = Web_persist.get_election_date uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
247
        let elections, tallied, archived = accu in
248
        match state with
Stephane Glondu's avatar
Stephane Glondu committed
249 250 251 252
        | `Tallied _ -> return (elections, (date, w) :: tallied, archived)
        | `Archived -> return (elections, tallied, (date, w) :: archived)
        | _ -> return ((date, w) :: elections, tallied, archived)
    ) ([], [], [])
253 254 255 256 257
  in
  let sort l =
    List.sort (fun (x, _) (y, _) -> datetime_compare x y) l |>
    List.map (fun (_, x) -> x)
  in
Stephane Glondu's avatar
Stephane Glondu committed
258
  return (sort elections, sort tallied, sort archived)
259

Stephane Glondu's avatar
Stephane Glondu committed
260 261
let () = Html5.register ~service:admin
  (fun () () ->
Stephane Glondu's avatar
Stephane Glondu committed
262
    let cont () = Redirection.send admin in
263
    Eliom_reference.set Web_state.cont [cont] >>
264 265
    let%lwt site_user = Web_state.get_site_user () in
    let%lwt elections =
266
      match site_user with
267
      | None -> return None
Stephane Glondu's avatar
Stephane Glondu committed
268
      | Some u ->
269 270
         let%lwt elections, tallied, archived = get_finalized_elections_by_owner u in
         let%lwt setup_elections =
271
           Ocsipersist.fold_step (fun k v accu ->
272
             let v = setup_election_of_string v in
273
             if v.se_owner = u
274
             then return ((uuid_of_string k, v.se_questions.t_name) :: accu)
275 276
             else return accu
           ) election_stable []
277
         in
Stephane Glondu's avatar
Stephane Glondu committed
278
         return @@ Some (elections, tallied, archived, setup_elections)
Stephane Glondu's avatar
Stephane Glondu committed
279
    in
280
    T.admin ~elections ()
Stephane Glondu's avatar
Stephane Glondu committed
281 282 283 284 285 286 287 288 289
  )

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

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

Stephane Glondu's avatar
Stephane Glondu committed
290 291 292 293 294 295 296 297 298 299 300 301
let create_new_election owner cred auth =
  let e_cred_authority = match cred with
    | `Automatic -> Some "server"
    | `Manual -> None
  in
  let e_auth_config = match auth with
    | `Password -> Some [{auth_system = "password"; auth_instance = "password"; auth_config = []}]
    | `Dummy -> Some [{auth_system = "dummy"; auth_instance = "dummy"; auth_config = []}]
    | `CAS server -> Some [{auth_system = "cas"; auth_instance = "cas"; auth_config = ["server", server]}]
  in
  let uuid = generate_uuid () in
  let uuid_s = Uuidm.to_string uuid in
302
  let%lwt token = generate_token () in
Stephane Glondu's avatar
Stephane Glondu committed
303 304 305 306
  let se_metadata = {
    e_owner = Some owner;
    e_auth_config;
    e_cred_authority;
307
    e_trustees = None;
308
    e_languages = Some ["en"; "fr"];
Stephane Glondu's avatar
Stephane Glondu committed
309 310 311
  } in
  let question = {
    q_answers = [| "Answer 1"; "Answer 2"; "Blank" |];
312
    q_blank = None;
Stephane Glondu's avatar
Stephane Glondu committed
313 314 315 316 317 318 319 320 321 322 323
    q_min = 1;
    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 |];
  } in
  let se = {
    se_owner = owner;
324
    se_group = "{\"g\":\"2402352677501852209227687703532399932712287657378364916510075318787663274146353219320285676155269678799694668298749389095083896573425601900601068477164491735474137283104610458681314511781646755400527402889846139864532661215055797097162016168270312886432456663834863635782106154918419982534315189740658186868651151358576410138882215396016043228843603930989333662772848406593138406010231675095763777982665103606822406635076697764025346253773085133173495194248967754052573659049492477631475991575198775177711481490920456600205478127054728238140972518639858334115700568353695553423781475582491896050296680037745308460627\",\"p\":\"20694785691422546401013643657505008064922989295751104097100884787057374219242717401922237254497684338129066633138078958404960054389636289796393038773905722803605973749427671376777618898589872735865049081167099310535867780980030790491654063777173764198678527273474476341835600035698305193144284561701911000786737307333564123971732897913240474578834468260652327974647951137672658693582180046317922073668860052627186363386088796882120769432366149491002923444346373222145884100586421050242120365433561201320481118852408731077014151666200162313177169372189248078507711827842317498073276598828825169183103125680162072880719\",\"q\":\"78571733251071885079927659812671450121821421258408794611510081919805623223441\"}"; (* generated by fips.sage *)
Stephane Glondu's avatar
Stephane Glondu committed
325 326 327 328 329
    se_voters = [];
    se_questions;
    se_public_keys = [];
    se_metadata;
    se_public_creds = token;
330
    se_public_creds_received = false;
Stephane Glondu's avatar
Stephane Glondu committed
331
  } in
332 333
  let%lwt () = set_setup_election uuid_s se in
  let%lwt () = Ocsipersist.add election_credtokens token uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
334 335 336 337 338
  return (preapply election_setup uuid)

let () = Html5.register ~service:election_setup_pre
  (fun () () -> T.election_setup_pre ())

Stephane Glondu's avatar
Stephane Glondu committed
339
let () = Redirection.register ~service:election_setup_new
Stephane Glondu's avatar
Stephane Glondu committed
340
  (fun () (credmgmt, (auth, cas_server)) ->
341
   match%lwt Web_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
342
   | Some u ->
343
      let%lwt credmgmt = match credmgmt with
Stephane Glondu's avatar
Stephane Glondu committed
344 345 346 347
        | Some "auto" -> return `Automatic
        | Some "manual" -> return `Manual
        | _ -> fail_http 400
      in
348
      let%lwt auth = match auth with
Stephane Glondu's avatar
Stephane Glondu committed
349 350 351 352 353 354 355
        | Some "password" -> return `Password
        | Some "dummy" -> return `Dummy
        | Some "cas" -> return @@ `CAS cas_server
        | _ -> fail_http 400
      in
      create_new_election u credmgmt auth
   | None -> forbidden ())
Stephane Glondu's avatar
Stephane Glondu committed
356

357
let generic_setup_page f uuid () =
358
  match%lwt Web_state.get_site_user () with
359 360
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
361
     let%lwt se = get_setup_election uuid_s in
362 363 364 365 366
     if se.se_owner = u
     then f uuid se ()
     else forbidden ()
  | None -> forbidden ()

Stephane Glondu's avatar
Stephane Glondu committed
367
let () = Html5.register ~service:election_setup
368
  (generic_setup_page T.election_setup)
Stephane Glondu's avatar
Stephane Glondu committed
369

370
let () = Html5.register ~service:election_setup_trustees
371 372 373 374
  (generic_setup_page T.election_setup_trustees)

let () = Html5.register ~service:election_setup_credential_authority
  (generic_setup_page T.election_setup_credential_authority)
375

Stephane Glondu's avatar
Stephane Glondu committed
376 377
let election_setup_mutex = Lwt_mutex.create ()

378
let handle_setup f uuid x =
379
  match%lwt Web_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
380 381 382
  | Some u ->
     let uuid_s = Uuidm.to_string uuid in
     Lwt_mutex.with_lock election_setup_mutex (fun () ->
383
       let%lwt se = get_setup_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
384
       if se.se_owner = u then (
385 386
         try%lwt
           let%lwt cont = f se x u uuid in
387
           set_setup_election uuid_s se >>
388
           cont ()
Stephane Glondu's avatar
Stephane Glondu committed
389
         with e ->
390 391
           let service = preapply election_setup uuid in
           T.generic_page ~title:"Error" ~service (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
392 393 394
       ) else forbidden ()
     )
  | None -> forbidden ()
395

396 397
let redir_preapply s u () = Redirection.send (preapply s u)

398 399 400 401 402
let () =
  Any.register
    ~service:election_setup_languages
    (handle_setup
       (fun se languages _ uuid ->
403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431
         let langs = languages_of_string languages in
         match langs with
         | None -> assert false
         | Some [] ->
            return (fun () ->
                let service = preapply election_setup uuid in
                T.generic_page ~title:"Error" ~service
                  "You must select at least one language!" () >>= Html5.send
              )
         | Some ls ->
            let unavailable =
              List.filter (fun x ->
                  not (List.mem x available_languages)
                ) ls
            in
            match unavailable with
            | [] ->
               se.se_metadata <- {
                  se.se_metadata with
                  e_languages = langs
                };
               return (redir_preapply election_setup uuid)
            | l :: _ ->
               return (fun () ->
                   let service = preapply election_setup uuid in
                   T.generic_page ~title:"Error" ~service
                     ("No such language: " ^ l) () >>= Html5.send
                 )
    ))
432

433 434 435 436
let () =
  Any.register
    ~service:election_setup_description
    (handle_setup
437
       (fun se (name, description) _ uuid ->
438 439 440
         se.se_questions <- {se.se_questions with
           t_name = name;
           t_description = description;
441 442
         };
         return (redir_preapply election_setup uuid)))
443

Stephane Glondu's avatar
Stephane Glondu committed
444
let generate_password langs title url id =
445
  let email, login = split_identity id in
446 447
  let%lwt salt = generate_token () in
  let%lwt password = generate_token () in
448
  let hashed = sha256_hex (salt ^ password) in
Stephane Glondu's avatar
Stephane Glondu committed
449 450 451 452 453 454
  let bodies = List.map (fun lang ->
    let module L = (val Web_i18n.get_lang lang) in
    Printf.sprintf L.mail_password title login password url
  ) langs in
  let body = PString.concat "\n\n----------\n\n" bodies in
  let body = body ^ "\n\n-- \nBelenios" in
Stephane Glondu's avatar
Stephane Glondu committed
455 456 457 458 459
  let subject =
    let lang = List.hd langs in
    let module L = (val Web_i18n.get_lang lang) in
    Printf.sprintf L.mail_password_subject title
  in
460
  send_email email subject body >>
461
  return (salt, hashed)
462

463
let handle_password se uuid ~force voters =
464 465 466
  if List.length voters > !maxmailsatonce then
    Lwt.fail (Failure (Printf.sprintf "Cannot send passwords, there are too many voters (max is %d)" !maxmailsatonce))
  else
467 468 469 470
  let title = se.se_questions.t_name in
  let url = Eliom_uri.make_string_uri ~absolute:true ~service:election_home
    (uuid, ()) |> rewrite_prefix
  in
471
  let langs = get_languages se.se_metadata.e_languages in
472 473 474 475
  Lwt_list.iter_s (fun id ->
    match id.sv_password with
    | Some _ when not force -> return_unit
    | None | Some _ ->
476
       let%lwt x = generate_password langs title url id.sv_id in
477 478 479
       return (id.sv_password <- Some x)
  ) voters >>
  return (fun () ->
Stephane Glondu's avatar
Stephane Glondu committed
480
    let service = preapply election_setup uuid in
481
    T.generic_page ~title:"Success" ~service
482 483
      "Passwords have been generated and mailed!" () >>= Html5.send)

484 485 486 487 488
let () =
  Any.register
    ~service:election_setup_auth_genpwd
    (handle_setup
       (fun se () _ uuid ->
489
         handle_password se uuid ~force:false se.se_voters))
490

491 492 493
let () =
  Any.register
    ~service:election_regenpwd
Stephane Glondu's avatar
Stephane Glondu committed
494
    (fun (uuid, ()) () ->
495 496 497 498 499 500
      T.regenpwd uuid () >>= Html5.send)

let () =
  Any.register
    ~service:election_regenpwd_post
    (fun (uuid, ()) user ->
501
      let uuid_s = Uuidm.to_string uuid in
502 503
      let%lwt w = find_election uuid_s in
      let%lwt metadata = Web_persist.get_election_metadata uuid_s in
504
      let module W = (val w) in
505
      let%lwt site_user = Web_state.get_site_user () in
506
      match site_user with
507
      | Some u when metadata.e_owner = Some u ->
508 509 510 511 512 513 514
         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
515
         let service = preapply election_admin (uuid, ()) in
516 517
         begin try%lwt
           let%lwt _ = Ocsipersist.find table user in
518
           let langs = get_languages metadata.e_languages in
519
           let%lwt x = generate_password langs title url user in
520
           Ocsipersist.add table user x >>
521
           dump_passwords (!spool_dir / uuid_s) table >>
522
           T.generic_page ~title:"Success" ~service
523 524 525
             ("A new password has been mailed to " ^ user ^ ".") ()
           >>= Html5.send
         with Not_found ->
526
           T.generic_page ~title:"Error" ~service
527 528 529 530 531 532
             (user ^ " is not a registered user for this election.") ()
           >>= Html5.send
         end
      | _ -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
533 534 535 536
let () =
  Html5.register
    ~service:election_setup_questions
    (fun uuid () ->
537
     match%lwt Web_state.get_site_user () with
538 539
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
540
        let%lwt se = get_setup_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
541
        if se.se_owner = u
542
        then T.election_setup_questions uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
543 544
        else forbidden ()
     | None -> forbidden ()
545 546
    )

Stephane Glondu's avatar
Stephane Glondu committed
547 548 549 550
let () =
  Any.register
    ~service:election_setup_questions_post
    (handle_setup
551 552
       (fun se x _ uuid ->
        se.se_questions <- template_of_string x;
553
         return (redir_preapply election_setup uuid)))
Stephane Glondu's avatar
Stephane Glondu committed
554

Stephane Glondu's avatar
Stephane Glondu committed
555 556 557 558
let () =
  Html5.register
    ~service:election_setup_voters
    (fun uuid () ->
559
      match%lwt Web_state.get_site_user () with
Stephane Glondu's avatar
Stephane Glondu committed
560 561
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
562
         let%lwt se = get_setup_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
563
         if se.se_owner = u
564
         then T.election_setup_voters uuid se !maxmailsatonce ()
Stephane Glondu's avatar
Stephane Glondu committed
565 566 567 568 569
         else forbidden ()
      | None -> forbidden ()
    )

(* see http://www.regular-expressions.info/email.html *)
Stephane Glondu's avatar
Stephane Glondu committed
570
let identity_rex = Pcre.regexp
Stephane Glondu's avatar
Stephane Glondu committed
571
  ~flags:[`CASELESS]
572
  "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,7}(,[A-Z0-9._%+-]+)?$"
Stephane Glondu's avatar
Stephane Glondu committed
573

Stephane Glondu's avatar
Stephane Glondu committed
574 575
let is_identity x =
  try ignore (Pcre.pcre_exec ~rex:identity_rex x); true
Stephane Glondu's avatar
Stephane Glondu committed
576 577
  with Not_found -> false

578 579 580 581 582 583 584 585
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

586 587
module SSet = Set.Make (PString)

588
let merge_voters a b f =
589 590 591 592 593 594 595
  let existing = List.fold_left (fun accu sv ->
    SSet.add sv.sv_id accu
  ) SSet.empty a in
  let _, res = List.fold_left (fun (existing, accu) sv_id ->
    if SSet.mem sv_id existing then
      (existing, accu)
    else
596
      (SSet.add sv_id existing, {sv_id; sv_password = f sv_id} :: accu)
597 598 599
  ) (existing, List.rev a) b in
  List.rev res

Stephane Glondu's avatar
Stephane Glondu committed
600 601
let () =
  Any.register
602
    ~service:election_setup_voters_add
Stephane Glondu's avatar
Stephane Glondu committed
603
    (handle_setup
604
       (fun se x _ uuid ->
605
         if se.se_public_creds_received then forbidden () else (
Stephane Glondu's avatar
Stephane Glondu committed
606 607 608
         let xs = Pcre.split x in
         let () =
           try
Stephane Glondu's avatar
Stephane Glondu committed
609 610
             let bad = List.find (fun x -> not (is_identity x)) xs in
             Printf.ksprintf failwith "%S is not a valid identity" bad
Stephane Glondu's avatar
Stephane Glondu committed
611 612
           with Not_found -> ()
         in
613
         se.se_voters <- merge_voters se.se_voters xs (fun _ -> None);
614
         return (redir_preapply election_setup_voters uuid))))
615 616 617 618 619 620

let () =
  Any.register
    ~service:election_setup_voters_remove
    (handle_setup
       (fun se voter _ uuid ->
621
         if se.se_public_creds_received then forbidden () else (
622 623 624
         se.se_voters <- List.filter (fun v ->
           v.sv_id <> voter
         ) se.se_voters;
625
         return (redir_preapply election_setup_voters uuid))))
Stephane Glondu's avatar
Stephane Glondu committed
626

627 628 629 630 631 632 633
let () =
  Any.register ~service:election_setup_voters_passwd
    (handle_setup
       (fun se voter _ uuid ->
         let voter = List.filter (fun v -> v.sv_id = voter) se.se_voters in
         handle_password se uuid ~force:true voter))

Stephane Glondu's avatar
Stephane Glondu committed
634
let () =
635
  Any.register
Stephane Glondu's avatar
Stephane Glondu committed
636
    ~service:election_setup_trustee_add
637 638
    (fun uuid st_id ->
     if is_email st_id then
639
     match%lwt Web_state.get_site_user () with
640 641
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
Stephane Glondu's avatar
Stephane Glondu committed
642
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
643
          let%lwt se = get_setup_election uuid_s in
Stephane Glondu's avatar
Stephane Glondu committed
644 645
          if se.se_owner = u
          then (
646
            let%lwt st_token = generate_token () in
647 648
            let trustee = {st_id; st_token; st_public_key = ""} in
            se.se_public_keys <- se.se_public_keys @ [trustee];
649
            set_setup_election uuid_s se >>
650
            Ocsipersist.add election_pktokens st_token uuid_s
Stephane Glondu's avatar
Stephane Glondu committed
651 652
          ) else forbidden ()
        ) >>
653
        Redirection.send (preapply election_setup_trustees uuid)
654
     | None -> forbidden ()
655 656
     else
       let msg = st_id ^ " is not a valid e-mail address!" in
657 658
       let service = preapply election_setup_trustees uuid in
       T.generic_page ~title:"Error" ~service msg () >>= Html5.send
659 660 661 662 663
    )

let () =
  Redirection.register
    ~service:election_setup_trustee_del
664
    (fun uuid index ->
665
     match%lwt Web_state.get_site_user () with
666 667 668
     | Some u ->
        let uuid_s = Uuidm.to_string uuid in
        Lwt_mutex.with_lock election_setup_mutex (fun () ->
669
          let%lwt se = get_setup_election uuid_s in
670 671
          if se.se_owner = u
          then (
672 673 674 675 676 677 678
            let trustees, old =
              se.se_public_keys |>
              List.mapi (fun i x -> i, x) |>
              List.partition (fun (i, _) -> i <> index) |>
              (fun (x, y) -> List.map snd x, List.map snd y)
            in
            se.se_public_keys <- trustees;
679
            set_setup_election uuid_s se >>
680 681 682
            Lwt_list.iter_s (fun {st_token; _} ->
              Ocsipersist.remove election_pktokens st_token
            ) old
683 684
          ) else forbidden ()
        ) >>
685
        return (preapply election_setup_trustees uuid)
686 687 688
     | None -> forbidden ()
    )

Stephane Glondu's avatar
Stephane Glondu committed
689 690 691 692
let () =
  Html5.register
    ~service:election_setup_credentials
    (fun token () ->
693 694
     let%lwt uuid = Ocsipersist.find election_credtokens token in
     let%lwt se = get_setup_election uuid in
695 696 697 698
     let uuid = match Uuidm.of_string uuid with
       | None -> failwith "invalid UUID extracted from credtokens"
       | Some u -> u
     in
Stephane Glondu's avatar
Stephane Glondu committed
699 700
     T.election_setup_credentials token uuid se ()
    )
701

Stephane Glondu's avatar
Stephane Glondu committed
702 703 704 705 706
let () =
  File.register
    ~service:election_setup_credentials_download
    ~content_type:"text/plain"
    (fun token () ->
707
     let%lwt uuid = Ocsipersist.find election_credtokens token in
Stephane Glondu's avatar
Stephane Glondu committed
708 709
     return (!spool_dir / uuid ^ ".public_creds.txt")
    )
710

Stephane Glondu's avatar
Stephane Glondu committed
711
let wrap_handler f =
712
  try%lwt f ()
Stephane Glondu's avatar
Stephane Glondu committed
713
  with
714
  | e -> T.generic_page ~title:"Error" (Printexc.to_string e) () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
715 716

let handle_credentials_post token creds =
717 718
  let%lwt uuid = Ocsipersist.find election_credtokens token in
  let%lwt se = get_setup_election uuid in
719
  if se.se_public_creds_received then forbidden () else
Stephane Glondu's avatar
Stephane Glondu committed
720 721 722 723 724 725 726 727 728 729
  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)
    ) >>
730
  let%lwt () =
Stephane Glondu's avatar
Stephane Glondu committed
731 732 733 734 735 736 737 738 739 740 741
    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
742
  let () = se.se_metadata <- {se.se_metadata with e_cred_authority = None} in
743
  let () = se.se_public_creds_received <- true in
744
  set_setup_election uuid se >>
745
  T.generic_page ~title:"Success" ~service:home
746
    "Credentials have been received and checked!" () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
747 748 749 750 751 752 753

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))
754

Stephane Glondu's avatar
Stephane Glondu committed
755 756 757 758 759 760 761
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))

762
module CG = Credential.MakeGenerate (LwtRandom)
763 764 765 766

let () =
  Any.register
    ~service:election_setup_credentials_server
767
    (handle_setup (fun se () _ uuid ->
768 769
      let nvoters = List.length se.se_voters in
      if nvoters > !maxmailsatonce then
770
        Lwt.fail (Failure (Printf.sprintf "Cannot send credentials, there are too many voters (max is %d)" !maxmailsatonce))
771 772
      else if nvoters = 0 then
        Lwt.fail (Failure "No voters")
773
      else
774
      if se.se_public_creds_received then forbidden () else
775 776 777
      let () = se.se_metadata <- {se.se_metadata with
        e_cred_authority = Some "server"
      } in
778
      let uuid_s = Uuidm.to_string uuid in
779 780 781 782 783
      let title = se.se_questions.t_name in
      let url = Eliom_uri.make_string_uri
        ~absolute:true ~service:election_home
        (uuid, ()) |> rewrite_prefix
      in
784 785
      let module S = Set.Make (PString) in
      let module G = (val Group.of_string se.se_group : GROUP) in
786
      let module CD = Credential.MakeDerive (G) in
787
      let%lwt creds =
788 789
        Lwt_list.fold_left_s (fun accu v ->
          let email, login = split_identity v.sv_id in
790
          let%lwt cred = CG.generate () in
791
          let pub_cred =
792
            let x = CD.derive uuid cred in
793 794 795
            let y = G.(g **~ x) in
            G.to_string y
          in
796
          let langs = get_languages se.se_metadata.e_languages in
Stephane Glondu's avatar
Stephane Glondu committed
797 798 799 800 801 802
          let bodies = List.map (fun lang ->
            let module L = (val Web_i18n.get_lang lang) in
            Printf.sprintf L.mail_credential title login cred url
          ) langs in
          let body = PString.concat "\n\n----------\n\n" bodies in
          let body = body ^ "\n\n-- \nBelenios" in
Stephane Glondu's avatar
Stephane Glondu committed
803 804 805 806 807
          let subject =
            let lang = List.hd langs in
            let module L = (val Web_i18n.get_lang lang) in
            Printf.sprintf L.mail_credential_subject title
          in
808
          let%lwt () = send_email email 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
      let%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
      se.se_public_creds_received <- true;
822
      return (fun () ->
823 824
        let service = preapply election_setup uuid in
        T.generic_page ~title:"Success" ~service
825
          "Credentials have been generated and mailed!" () >>= Html5.send)))
826

Stephane Glondu's avatar
Stephane Glondu committed
827 828 829 830
let () =
  Html5.register
    ~service:election_setup_trustee
    (fun token () ->
831 832
     let%lwt uuid = Ocsipersist.find election_pktokens token in
     let%lwt se = get_setup_election uuid in
833 834 835 836 837
     let uuid = match Uuidm.of_string uuid with
       | None -> failwith "invalid UUID extracted from pktokens"
       | Some u -> u
     in
     T.election_setup_trustee token uuid se ()
Stephane Glondu's avatar
Stephane Glondu committed
838 839 840 841 842 843 844 845
    )

let () =
  Any.register
    ~service:election_setup_trustee_post
    (fun token public_key ->
     wrap_handler
       (fun () ->
846
        let%lwt uuid = Ocsipersist.find election_pktokens token in
Stephane Glondu's avatar
Stephane Glondu committed
847 848 849
        Lwt_mutex.with_lock
          election_setup_mutex
          (fun () ->
850
           let%lwt se = get_setup_election uuid in
851
           let t = List.find (fun x -> token = x.st_token) se.se_public_keys in
Stephane Glondu's avatar
Stephane Glondu committed
852 853
           let module G = (val Group.of_string se.se_group : GROUP) in
           let pk = trustee_public_key_of_string G.read public_key in
854
           let module KG = Trustees.MakeSimpleDistKeyGen (G) (LwtRandom) in
Stephane Glondu's avatar
Stephane Glondu committed
855 856
           if not (KG.check pk) then failwith "invalid public key";
           (* we keep pk as a string because of G.t *)
857
           t.st_public_key <- public_key;
858
           set_setup_election uuid se
859
          ) >> T.generic_page ~title:"Success"
860 861
            "Your key has been received and checked!"
            () >>= Html5.send
Stephane Glondu's avatar
Stephane Glondu committed
862 863 864
       )
    )

865 866 867 868
let () =
  Any.register
    ~service:election_setup_confirm
    (fun uuid () ->
869
      match%lwt Web_state.get_site_user () with
870 871 872
      | None -> forbidden ()
      | Some u ->
         let uuid_s = Uuidm.to_string uuid in
873
         let%lwt se = get_setup_election uuid_s in
874 875 876
         if se.se_owner <> u then forbidden () else
         T.election_setup_confirm uuid se () >>=