src/main.sml

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* Main interface *)
  20
  21 structure Main :> MAIN = struct
  22
  23 open Ast MsgTypes Print
  24
  25 structure SM = StringMap
  26
  27 fun init () = Acl.read Config.aclFile
  28
  29 fun check' G fname =
  30     let
  31         val prog = Parse.parse fname
  32     in
  33         if !ErrorMsg.anyErrors then
  34             G
  35         else
  36             Tycheck.checkFile G (Defaults.tInit ()) prog
  37     end
  38
  39 fun basis () =
  40     let
  41         val dir = Posix.FileSys.opendir Config.libRoot
  42
  43         fun loop files =
  44             case Posix.FileSys.readdir dir of
  45                 NONE => (Posix.FileSys.closedir dir;
  46                          files)
  47               | SOME fname =>
  48                 if String.isSuffix ".dtl" fname then
  49                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
  50                                                file = fname}
  51                           :: files)
  52                 else
  53                     loop files
  54
  55         val files = loop []
  56         val (_, files) = Order.order NONE files
  57     in
  58         if !ErrorMsg.anyErrors then
  59             Env.empty
  60         else
  61             (Tycheck.allowExterns ();
  62              foldl (fn (fname, G) => check' G fname) Env.empty files
  63              before Tycheck.disallowExterns ())
  64     end
  65
  66 fun check fname =
  67     let
  68         val _ = ErrorMsg.reset ()
  69         val _ = Env.preTycheck ()
  70
  71         val b = basis ()
  72     in
  73         if !ErrorMsg.anyErrors then
  74             raise ErrorMsg.Error
  75         else
  76             let
  77                 val _ = Tycheck.disallowExterns ()
  78                 val _ = ErrorMsg.reset ()
  79                 val prog = Parse.parse fname
  80             in
  81                 if !ErrorMsg.anyErrors then
  82                     raise ErrorMsg.Error
  83                 else
  84                     let
  85                         val G' = Tycheck.checkFile b (Defaults.tInit ()) prog
  86                     in
  87                         if !ErrorMsg.anyErrors then
  88                             raise ErrorMsg.Error
  89                         else
  90                             (G', #3 prog)
  91                     end
  92             end
  93     end
  94
  95 val notTmp = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-")
  96
  97 fun checkDir dname =
  98     let
  99         val b = basis ()
 100
 101         val dir = Posix.FileSys.opendir dname
 102
 103         fun loop files =
 104             case Posix.FileSys.readdir dir of
 105                 NONE => (Posix.FileSys.closedir dir;
 106                          files)
 107               | SOME fname =>
 108                 if notTmp fname then
 109                     loop (OS.Path.joinDirFile {dir = dname,
 110                                                file = fname}
 111                           :: files)
 112                 else
 113                     loop files
 114
 115         val files = loop []
 116         val (_, files) = Order.order (SOME b) files
 117     in
 118         if !ErrorMsg.anyErrors then
 119             raise ErrorMsg.Error
 120         else
 121             (foldl (fn (fname, G) => check' G fname) b files;
 122              if !ErrorMsg.anyErrors then
 123                  raise ErrorMsg.Error
 124              else
 125                  ())
 126     end
 127
 128 fun reduce fname =
 129     let
 130         val (G, body) = check fname
 131     in
 132         if !ErrorMsg.anyErrors then
 133             NONE
 134         else
 135             case body of
 136                 SOME body =>
 137                 let
 138                     val body' = Reduce.reduceExp G body
 139                 in
 140                     (*printd (PD.hovBox (PD.PPS.Rel 0,
 141                                          [PD.string "Result:",
 142                                           PD.space 1,
 143                                           p_exp body']))*)
 144                     SOME body'
 145                 end
 146               | _ => NONE
 147     end
 148
 149 fun eval fname =
 150     case reduce fname of
 151         (SOME body') =>
 152         if !ErrorMsg.anyErrors then
 153             raise ErrorMsg.Error
 154         else
 155             Eval.exec (Defaults.eInit ()) body'
 156       | NONE => raise ErrorMsg.Error
 157
 158 fun eval' fname =
 159     case reduce fname of
 160         (SOME body') =>
 161         if !ErrorMsg.anyErrors then
 162             raise ErrorMsg.Error
 163         else
 164             ignore (Eval.exec' (Defaults.eInit ()) body')
 165       | NONE => raise ErrorMsg.Error
 166
 167 val dispatcher =
 168     Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort
 169
 170 fun requestContext f =
 171     let
 172         val uid = Posix.ProcEnv.getuid ()
 173         val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
 174
 175         val () = Acl.read Config.aclFile
 176         val () = Domain.setUser user
 177
 178         val () = f ()
 179
 180         val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
 181                                        Config.keyDir ^ "/" ^ user ^ "/key.pem",
 182                                        Config.trustStore)
 183     in
 184         (user, context)
 185     end
 186
 187 fun requestBio f =
 188     let
 189         val (user, context) = requestContext f
 190     in
 191         (user, OpenSSL.connect (context, dispatcher))
 192     end
 193
 194 fun request fname =
 195     let
 196         val (user, bio) = requestBio (fn () => ignore (check fname))
 197
 198         val inf = TextIO.openIn fname
 199
 200         fun loop lines =
 201             case TextIO.inputLine inf of
 202                 NONE => String.concat (List.rev lines)
 203               | SOME line => loop (line :: lines)
 204
 205         val code = loop []
 206     in
 207         TextIO.closeIn inf;
 208         Msg.send (bio, MsgConfig code);
 209         case Msg.recv bio of
 210             NONE => print "Server closed connection unexpectedly.\n"
 211           | SOME m =>
 212             case m of
 213                 MsgOk => print "Configuration succeeded.\n"
 214               | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 215               | _ => print "Unexpected server reply.\n";
 216         OpenSSL.close bio
 217     end
 218     handle ErrorMsg.Error => ()
 219
 220 fun requestDir dname =
 221     let
 222         val _ = ErrorMsg.reset ()
 223
 224         val (user, bio) = requestBio (fn () => checkDir dname)
 225
 226         val b = basis ()
 227
 228         val dir = Posix.FileSys.opendir dname
 229
 230         fun loop files =
 231             case Posix.FileSys.readdir dir of
 232                 NONE => (Posix.FileSys.closedir dir;
 233                          files)
 234               | SOME fname =>
 235                 if notTmp fname then
 236                     loop (OS.Path.joinDirFile {dir = dname,
 237                                                file = fname}
 238                           :: files)
 239                 else
 240                     loop files
 241
 242         val files = loop []
 243         val (_, files) = Order.order (SOME b) files
 244
 245         val _ = if !ErrorMsg.anyErrors then
 246                     raise ErrorMsg.Error
 247                 else
 248                     ()
 249
 250         val codes = map (fn fname =>
 251                             let
 252                                 val inf = TextIO.openIn fname
 253
 254                                 fun loop lines =
 255                                     case TextIO.inputLine inf of
 256                                         NONE => String.concat (rev lines)
 257                                       | SOME line => loop (line :: lines)
 258                             in
 259                                 loop []
 260                                 before TextIO.closeIn inf
 261                             end) files
 262     in
 263         if !ErrorMsg.anyErrors then
 264             ()
 265         else
 266             (Msg.send (bio, MsgMultiConfig codes);
 267              case Msg.recv bio of
 268                  NONE => print "Server closed connection unexpectedly.\n"
 269                | SOME m =>
 270                  case m of
 271                      MsgOk => print "Configuration succeeded.\n"
 272                    | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 273                    | _ => print "Unexpected server reply.\n";
 274              OpenSSL.close bio)
 275     end
 276     handle ErrorMsg.Error => ()
 277
 278 fun requestGrant acl =
 279     let
 280         val (user, bio) = requestBio (fn () => ())
 281     in
 282         Msg.send (bio, MsgGrant acl);
 283         case Msg.recv bio of
 284             NONE => print "Server closed connection unexpectedly.\n"
 285           | SOME m =>
 286             case m of
 287                 MsgOk => print "Grant succeeded.\n"
 288               | MsgError s => print ("Grant failed: " ^ s ^ "\n")
 289               | _ => print "Unexpected server reply.\n";
 290         OpenSSL.close bio
 291     end
 292
 293 fun requestRevoke acl =
 294     let
 295         val (user, bio) = requestBio (fn () => ())
 296     in
 297         Msg.send (bio, MsgRevoke acl);
 298         case Msg.recv bio of
 299             NONE => print "Server closed connection unexpectedly.\n"
 300           | SOME m =>
 301             case m of
 302                 MsgOk => print "Revoke succeeded.\n"
 303               | MsgError s => print ("Revoke failed: " ^ s ^ "\n")
 304               | _ => print "Unexpected server reply.\n";
 305         OpenSSL.close bio
 306     end
 307
 308 fun requestListPerms user =
 309     let
 310         val (_, bio) = requestBio (fn () => ())
 311     in
 312         Msg.send (bio, MsgListPerms user);
 313         (case Msg.recv bio of
 314              NONE => (print "Server closed connection unexpectedly.\n";
 315                       NONE)
 316            | SOME m =>
 317              case m of
 318                  MsgPerms perms => SOME perms
 319                | MsgError s => (print ("Listing failed: " ^ s ^ "\n");
 320                                 NONE)
 321                | _ => (print "Unexpected server reply.\n";
 322                        NONE))
 323         before OpenSSL.close bio
 324     end
 325
 326 fun requestWhoHas perm =
 327     let
 328         val (_, bio) = requestBio (fn () => ())
 329     in
 330         Msg.send (bio, MsgWhoHas perm);
 331         (case Msg.recv bio of
 332              NONE => (print "Server closed connection unexpectedly.\n";
 333                       NONE)
 334            | SOME m =>
 335              case m of
 336                  MsgWhoHasResponse users => SOME users
 337                | MsgError s => (print ("whohas failed: " ^ s ^ "\n");
 338                                 NONE)
 339                | _ => (print "Unexpected server reply.\n";
 340                        NONE))
 341         before OpenSSL.close bio
 342     end
 343
 344 fun requestRegen () =
 345     let
 346         val (_, bio) = requestBio (fn () => ())
 347     in
 348         Msg.send (bio, MsgRegenerate);
 349         case Msg.recv bio of
 350             NONE => print "Server closed connection unexpectedly.\n"
 351           | SOME m =>
 352             case m of
 353                 MsgOk => print "Regeneration succeeded.\n"
 354               | MsgError s => print ("Regeneration failed: " ^ s ^ "\n")
 355               | _ => print "Unexpected server reply.\n";
 356         OpenSSL.close bio
 357     end
 358
 359 fun requestRmdom dom =
 360     let
 361         val (_, bio) = requestBio (fn () => ())
 362     in
 363         Msg.send (bio, MsgRmdom dom);
 364         case Msg.recv bio of
 365             NONE => print "Server closed connection unexpectedly.\n"
 366           | SOME m =>
 367             case m of
 368                 MsgOk => print "Removal succeeded.\n"
 369               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 370               | _ => print "Unexpected server reply.\n";
 371         OpenSSL.close bio
 372     end
 373
 374 fun requestRmuser user =
 375     let
 376         val (_, bio) = requestBio (fn () => ())
 377     in
 378         Msg.send (bio, MsgRmuser user);
 379         case Msg.recv bio of
 380             NONE => print "Server closed connection unexpectedly.\n"
 381           | SOME m =>
 382             case m of
 383                 MsgOk => print "Removal succeeded.\n"
 384               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 385               | _ => print "Unexpected server reply.\n";
 386         OpenSSL.close bio
 387     end
 388
 389 fun requestDbUser dbtype =
 390     let
 391         val (_, bio) = requestBio (fn () => ())
 392     in
 393         Msg.send (bio, MsgCreateDbUser dbtype);
 394         case Msg.recv bio of
 395             NONE => print "Server closed connection unexpectedly.\n"
 396           | SOME m =>
 397             case m of
 398                 MsgOk => print "Your user has been created.\n"
 399               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 400               | _ => print "Unexpected server reply.\n";
 401         OpenSSL.close bio
 402     end
 403
 404 fun requestDbTable p =
 405     let
 406         val (user, bio) = requestBio (fn () => ())
 407     in
 408         Msg.send (bio, MsgCreateDbTable p);
 409         case Msg.recv bio of
 410             NONE => print "Server closed connection unexpectedly.\n"
 411           | SOME m =>
 412             case m of
 413                 MsgOk => print ("Your database " ^ user ^ "_" ^ #dbname p ^ " has been created.\n")
 414               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 415               | _ => print "Unexpected server reply.\n";
 416         OpenSSL.close bio
 417     end
 418
 419 fun requestNewMailbox p =
 420     let
 421         val (_, bio) = requestBio (fn () => ())
 422     in
 423         Msg.send (bio, MsgNewMailbox p);
 424         case Msg.recv bio of
 425             NONE => print "Server closed connection unexpectedly.\n"
 426           | SOME m =>
 427             case m of
 428                 MsgOk => print ("A mapping for " ^ #user p ^ "@" ^ #domain p ^ " has been created.\n")
 429               | MsgError s => print ("Creation failed: " ^ s ^ "\n")
 430               | _ => print "Unexpected server reply.\n";
 431         OpenSSL.close bio
 432     end
 433
 434 fun requestPasswdMailbox p =
 435     let
 436         val (_, bio) = requestBio (fn () => ())
 437     in
 438         Msg.send (bio, MsgPasswdMailbox p);
 439         case Msg.recv bio of
 440             NONE => print "Server closed connection unexpectedly.\n"
 441           | SOME m =>
 442             case m of
 443                 MsgOk => print ("The password for " ^ #user p ^ "@" ^ #domain p ^ " has been changed.\n")
 444               | MsgError s => print ("Set failed: " ^ s ^ "\n")
 445               | _ => print "Unexpected server reply.\n";
 446         OpenSSL.close bio
 447     end
 448
 449 fun requestRmMailbox p =
 450     let
 451         val (_, bio) = requestBio (fn () => ())
 452     in
 453         Msg.send (bio, MsgRmMailbox p);
 454         case Msg.recv bio of
 455             NONE => print "Server closed connection unexpectedly.\n"
 456           | SOME m =>
 457             case m of
 458                 MsgOk => print ("The mapping for mailbox " ^ #user p ^ "@" ^ #domain p ^ " has been deleted.\n")
 459               | MsgError s => print ("Remove failed: " ^ s ^ "\n")
 460               | _ => print "Unexpected server reply.\n";
 461         OpenSSL.close bio
 462     end
 463
 464 fun regenerate context =
 465     let
 466         val b = basis ()
 467         val () = Tycheck.disallowExterns ()
 468
 469         val () = Domain.resetGlobal ()
 470
 471         fun contactNode (node, ip) =
 472             if node = Config.defaultNode then
 473                 Domain.resetLocal ()
 474             else let
 475                     val bio = OpenSSL.connect (context,
 476                                                ip
 477                                                ^ ":"
 478                                                ^ Int.toString Config.slavePort)
 479                 in
 480                     Msg.send (bio, MsgRegenerate);
 481                     case Msg.recv bio of
 482                         NONE => print "Slave closed connection unexpectedly\n"
 483                       | SOME m =>
 484                         case m of
 485                             MsgOk => print ("Slave " ^ node ^ " pre-regeneration finished\n")
 486                           | MsgError s => print ("Slave " ^ node
 487                                                  ^ " returned error: " ^
 488                                                  s ^ "\n")
 489                           | _ => print ("Slave " ^ node
 490                                         ^ " returned unexpected command\n");
 491                     OpenSSL.close bio
 492                 end
 493
 494         fun doUser user =
 495             let
 496                 val _ = Domain.setUser user
 497                 val _ = ErrorMsg.reset ()
 498
 499                 val dname = Config.domtoolDir user
 500
 501                 val dir = Posix.FileSys.opendir dname
 502
 503                 fun loop files =
 504                     case Posix.FileSys.readdir dir of
 505                         NONE => (Posix.FileSys.closedir dir;
 506                                  files)
 507                       | SOME fname =>
 508                         if notTmp fname then
 509                             loop (OS.Path.joinDirFile {dir = dname,
 510                                                        file = fname}
 511                                   :: files)
 512                         else
 513                             loop files
 514
 515                 val files = loop []
 516                 val (_, files) = Order.order (SOME b) files
 517             in
 518                 if !ErrorMsg.anyErrors then
 519                     print ("User " ^ user ^ "'s configuration has errors!\n")
 520                 else
 521                     app eval' files
 522             end
 523                 handle IO.Io _ => ()
 524                      | OS.SysErr (s, _) => print ("System error processing user " ^ user ^ ": " ^ s ^ "\n")
 525     in
 526         app contactNode Config.nodeIps;
 527         Env.pre ();
 528         app doUser (Acl.users ());
 529         Env.post ()
 530     end
 531
 532 fun rmuser user =
 533     let
 534         val doms = Acl.class {user = user, class = "domain"}
 535         val doms = List.filter (fn dom =>
 536                                    case Acl.whoHas {class = "domain", value = dom} of
 537                                        [_] => true
 538                                      | _ => false) (StringSet.listItems doms)
 539     in
 540         Acl.rmuser user;
 541         Domain.rmdom doms
 542     end
 543
 544 fun service () =
 545     let
 546         val () = Acl.read Config.aclFile
 547
 548         val context = OpenSSL.context (Config.serverCert,
 549                                        Config.serverKey,
 550                                        Config.trustStore)
 551         val _ = Domain.set_context context
 552
 553         val sock = OpenSSL.listen (context, Config.dispatcherPort)
 554
 555         fun loop () =
 556             case OpenSSL.accept sock of
 557                 NONE => ()
 558               | SOME bio =>
 559                 let
 560                     val user = OpenSSL.peerCN bio
 561                     val () = print ("\nConnection from " ^ user ^ "\n")
 562                     val () = Domain.setUser user
 563
 564                     fun doIt f cleanup =
 565                         ((case f () of
 566                              (msgLocal, SOME msgRemote) =>
 567                              (print msgLocal;
 568                               print "\n";
 569                               Msg.send (bio, MsgError msgRemote))
 570                            | (msgLocal, NONE) =>
 571                              (print msgLocal;
 572                               print "\n";
 573                               Msg.send (bio, MsgOk)))
 574                          handle OpenSSL.OpenSSL _ =>
 575                                 print "OpenSSL error\n"
 576                               | OS.SysErr (s, _) =>
 577                                 (print "System error: ";
 578                                  print s;
 579                                  print "\n";
 580                                  Msg.send (bio, MsgError ("System error: " ^ s))
 581                                  handle OpenSSL.OpenSSL _ => ())
 582                               | Fail s =>
 583                                 (print "Failure: ";
 584                                  print s;
 585                                  print "\n";
 586                                  Msg.send (bio, MsgError ("Failure: " ^ s))
 587                                  handle OpenSSL.OpenSSL _ => ())
 588                               | ErrorMsg.Error =>
 589                                 (print "Compilation error\n";
 590                                  Msg.send (bio, MsgError "Error during configuration evaluation")
 591                                  handle OpenSSL.OpenSSL _ => ());
 592                          (cleanup ();
 593                           ignore (OpenSSL.readChar bio);
 594                           OpenSSL.close bio)
 595                          handle OpenSSL.OpenSSL _ => ();
 596                          loop ())
 597
 598                     fun doConfig codes =
 599                         let
 600                             val _ = print "Configuration:\n"
 601                             val _ = app (fn s => (print s; print "\n")) codes
 602                             val _ = print "\n"
 603
 604                             val outname = OS.FileSys.tmpName ()
 605
 606                             fun doOne code =
 607                                 let
 608                                     val outf = TextIO.openOut outname
 609                                 in
 610                                     TextIO.output (outf, code);
 611                                     TextIO.closeOut outf;
 612                                     eval' outname
 613                                 end
 614                         in
 615                             doIt (fn () => (Env.pre ();
 616                                             app doOne codes;
 617                                             Env.post ();
 618                                             Msg.send (bio, MsgOk);
 619                                             ("Configuration complete.", NONE)))
 620                                  (fn () => OS.FileSys.remove outname)
 621                         end
 622
 623                     fun cmdLoop () =
 624                         case Msg.recv bio of
 625                             NONE => (OpenSSL.close bio
 626                                      handle OpenSSL.OpenSSL _ => ();
 627                                      loop ())
 628                           | SOME m =>
 629                             case m of
 630                                 MsgConfig code => doConfig [code]
 631                               | MsgMultiConfig codes => doConfig codes
 632
 633                               | MsgGrant acl =>
 634                                 doIt (fn () =>
 635                                          if Acl.query {user = user, class = "priv", value = "all"} then
 636                                              (Acl.grant acl;
 637                                               Acl.write Config.aclFile;
 638                                               ("Granted permission " ^ #value acl ^ " to " ^ #user acl ^ " in " ^ #class acl ^ ".",
 639                                                NONE))
 640                                          else
 641                                              ("Unauthorized user asked to grant a permission!",
 642                                               SOME "Not authorized to grant privileges"))
 643                                      (fn () => ())
 644
 645                               | MsgRevoke acl =>
 646                                 doIt (fn () =>
 647                                          if Acl.query {user = user, class = "priv", value = "all"} then
 648                                              (Acl.revoke acl;
 649                                               Acl.write Config.aclFile;
 650                                               ("Revoked permission " ^ #value acl ^ " from " ^ #user acl ^ " in " ^ #class acl ^ ".",
 651                                                NONE))
 652                                          else
 653                                              ("Unauthorized user asked to revoke a permission!",
 654                                               SOME "Not authorized to revoke privileges"))
 655                                      (fn () => ())
 656
 657                               | MsgListPerms user =>
 658                                 doIt (fn () =>
 659                                          (Msg.send (bio, MsgPerms (Acl.queryAll user));
 660                                           ("Sent permission list for user " ^ user ^ ".",
 661                                            NONE)))
 662                                      (fn () => ())
 663
 664                               | MsgWhoHas perm =>
 665                                 doIt (fn () =>
 666                                          (Msg.send (bio, MsgWhoHasResponse (Acl.whoHas perm));
 667                                           ("Sent whohas response for " ^ #class perm ^ " / " ^ #value perm ^ ".",
 668                                            NONE)))
 669                                      (fn () => ())
 670
 671                               | MsgRmdom doms =>
 672                                 doIt (fn () =>
 673                                          if Acl.query {user = user, class = "priv", value = "all"}
 674                                             orelse List.all (fn dom => Acl.query {user = user, class = "domain", value = dom}) doms then
 675                                              (Domain.rmdom doms;
 676                                               app (fn dom =>
 677                                                       Acl.revokeFromAll {class = "domain", value = dom}) doms;
 678                                               Acl.write Config.aclFile;
 679                                               ("Removed domains" ^ foldl (fn (d, s) => s ^ " " ^ d) "" doms ^ ".",
 680                                                NONE))
 681                                          else
 682                                              ("Unauthorized user asked to remove a domain!",
 683                                               SOME "Not authorized to remove that domain"))
 684                                      (fn () => ())
 685
 686                               | MsgRegenerate =>
 687                                 doIt (fn () =>
 688                                          if Acl.query {user = user, class = "priv", value = "regen"}
 689                                             orelse Acl.query {user = user, class = "priv", value = "all"} then
 690                                              (regenerate context;
 691                                               ("Regenerated all configuration.",
 692                                                NONE))
 693                                          else
 694                                              ("Unauthorized user asked to regenerate!",
 695                                               SOME "Not authorized to regenerate"))
 696                                      (fn () => ())
 697
 698                               | MsgRmuser user' =>
 699                                 doIt (fn () =>
 700                                          if Acl.query {user = user, class = "priv", value = "all"} then
 701                                              (rmuser user';
 702                                               Acl.write Config.aclFile;
 703                                               ("Removed user " ^ user' ^ ".",
 704                                                NONE))
 705                                          else
 706                                              ("Unauthorized user asked to remove a user!",
 707                                               SOME "Not authorized to remove users"))
 708                                      (fn () => ())
 709
 710                               | MsgCreateDbUser {dbtype, passwd} =>
 711                                 doIt (fn () =>
 712                                          case Dbms.lookup dbtype of
 713                                              NONE => ("Database user creation request with unknown datatype type " ^ dbtype,
 714                                                       SOME ("Unknown database type " ^ dbtype))
 715                                            | SOME handler =>
 716                                              case #adduser handler {user = user, passwd = passwd} of
 717                                                  NONE => ("Added " ^ dbtype ^ " user " ^ user ^ ".",
 718                                                           NONE)
 719                                                | SOME msg =>
 720                                                  ("Error adding a " ^ dbtype ^ " user " ^ user ^ ": " ^ msg,
 721                                                   SOME ("Error adding user: " ^ msg)))
 722                                      (fn () => ())
 723
 724                               | MsgCreateDbTable {dbtype, dbname} =>
 725                                 doIt (fn () =>
 726                                          if Dbms.validDbname dbname then
 727                                              case Dbms.lookup dbtype of
 728                                                  NONE => ("Database creation request with unknown datatype type " ^ dbtype,
 729                                                           SOME ("Unknown database type " ^ dbtype))
 730                                                | SOME handler =>
 731                                                  case #createdb handler {user = user, dbname = dbname} of
 732                                                      NONE => ("Created database " ^ user ^ "_" ^ dbname ^ ".",
 733                                                               NONE)
 734                                                    | SOME msg => ("Error creating database " ^ user ^ "_" ^ dbname ^ ": " ^ msg,
 735                                                                   SOME ("Error creating database: " ^ msg))
 736                                          else
 737                                              ("Invalid database name " ^ user ^ "_" ^ dbname,
 738                                               SOME ("Invalid database name " ^ dbname)))
 739                                      (fn () => ())
 740
 741                               | MsgNewMailbox {domain, user = emailUser, passwd, mailbox} =>
 742                                 doIt (fn () =>
 743                                          if not (Domain.yourDomain domain) then
 744                                              ("User wasn't authorized to add a mailbox to " ^ domain,
 745                                               SOME "You're not authorized to configure that domain.")
 746                                          else if not (Domain.validUser emailUser) then
 747                                              ("Invalid e-mail username " ^ emailUser,
 748                                               SOME "Invalid e-mail username")
 749                                          else if not (CharVector.all Char.isGraph passwd) then
 750                                              ("Invalid password",
 751                                               SOME "Invalid password; may only contain printable, non-space characters")
 752                                          else if not (Domain.yourPath mailbox) then
 753                                              ("User wasn't authorized to add a mailbox at " ^ mailbox,
 754                                               SOME "You're not authorized to use that mailbox location.")
 755                                          else
 756                                              case Vmail.add {requester = user,
 757                                                              domain = domain, user = emailUser,
 758                                                              passwd = passwd, mailbox = mailbox} of
 759                                                  NONE => ("Added mailbox " ^ emailUser ^ "@" ^ domain ^ " at " ^ mailbox,
 760                                                           NONE)
 761                                                | SOME msg => ("Error adding mailbox: " ^ msg,
 762                                                               SOME msg))
 763                                      (fn () => ())
 764
 765                               | MsgPasswdMailbox {domain, user = emailUser, passwd} =>
 766                                 doIt (fn () =>
 767                                          if not (Domain.yourDomain domain) then
 768                                              ("User wasn't authorized to change password of a mailbox for " ^ domain,
 769                                               SOME "You're not authorized to configure that domain.")
 770                                          else if not (Domain.validUser emailUser) then
 771                                              ("Invalid e-mail username " ^ emailUser,
 772                                               SOME "Invalid e-mail username")
 773                                          else if not (CharVector.all Char.isGraph passwd) then
 774                                              ("Invalid password",
 775                                               SOME "Invalid password; may only contain printable, non-space characters")
 776                                          else
 777                                              case Vmail.passwd {domain = domain, user = emailUser,
 778                                                                 passwd = passwd} of
 779                                                  NONE => ("Changed password of mailbox " ^ emailUser ^ "@" ^ domain,
 780                                                           NONE)
 781                                                | SOME msg => ("Error changing mailbox password: " ^ msg,
 782                                                               SOME msg))
 783                                      (fn () => ())
 784
 785                               | MsgRmMailbox {domain, user = emailUser} =>
 786                                 doIt (fn () =>
 787                                          if not (Domain.yourDomain domain) then
 788                                              ("User wasn't authorized to change password of a mailbox for " ^ domain,
 789                                               SOME "You're not authorized to configure that domain.")
 790                                          else if not (Domain.validUser emailUser) then
 791                                              ("Invalid e-mail username " ^ emailUser,
 792                                               SOME "Invalid e-mail username")
 793                                          else
 794                                              case Vmail.rm {domain = domain, user = emailUser} of
 795                                                  NONE => ("Deleted mailbox " ^ emailUser ^ "@" ^ domain,
 796                                                           NONE)
 797                                                | SOME msg => ("Error deleting mailbox: " ^ msg,
 798                                                               SOME msg))
 799                                      (fn () => ())
 800
 801                               | _ =>
 802                                 doIt (fn () => ("Unexpected command",
 803                                                 SOME "Unexpected command"))
 804                                      (fn () => ())
 805                 in
 806                     cmdLoop ()
 807                 end
 808                     handle OpenSSL.OpenSSL s =>
 809                            (print ("OpenSSL error: " ^ s ^ "\n");
 810                             OpenSSL.close bio
 811                             handle OpenSSL.OpenSSL _ => ();
 812                             loop ())
 813                          | OS.SysErr (s, _) =>
 814                            (print ("System error: " ^ s ^ "\n");
 815                             OpenSSL.close bio
 816                             handle OpenSSL.OpenSSL _ => ();
 817                             loop ())
 818     in
 819         print "Listening for connections....\n";
 820         loop ();
 821         OpenSSL.shutdown sock
 822     end
 823
 824 fun slave () =
 825     let
 826         val host = Slave.hostname ()
 827
 828         val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
 829                                        Config.keyDir ^ "/" ^ host ^ "/key.pem",
 830                                        Config.trustStore)
 831
 832         val sock = OpenSSL.listen (context, Config.slavePort)
 833
 834         fun loop () =
 835             case OpenSSL.accept sock of
 836                 NONE => ()
 837               | SOME bio =>
 838                 let
 839                     val peer = OpenSSL.peerCN bio
 840                     val () = print ("\nConnection from " ^ peer ^ "\n")
 841                 in
 842                     if peer <> Config.dispatcherName then
 843                         (print "Not authorized!\n";
 844                          OpenSSL.close bio;
 845                          loop ())
 846                     else let
 847                             fun loop' files =
 848                                 case Msg.recv bio of
 849                                     NONE => print "Dispatcher closed connection unexpectedly\n"
 850                                   | SOME m =>
 851                                     case m of
 852                                         MsgFile file => loop' (file :: files)
 853                                       | MsgDoFiles => (Slave.handleChanges files;
 854                                                        Msg.send (bio, MsgOk))
 855                                       | MsgRegenerate => (Domain.resetLocal ();
 856                                                           Msg.send (bio, MsgOk))
 857                                       | _ => (print "Dispatcher sent unexpected command\n";
 858                                               Msg.send (bio, MsgError "Unexpected command"))
 859                         in
 860                             loop' [];
 861                             ignore (OpenSSL.readChar bio);
 862                             OpenSSL.close bio;
 863                             loop ()
 864                         end
 865                 end handle OpenSSL.OpenSSL s =>
 866                            (print ("OpenSSL error: "^ s ^ "\n");
 867                             OpenSSL.close bio
 868                                           handle OpenSSL.OpenSSL _ => ();
 869                             loop ())
 870                          | OS.SysErr (s, _) =>
 871                            (print ("System error: "^ s ^ "\n");
 872                             OpenSSL.close bio
 873                             handle OpenSSL.OpenSSL _ => ();
 874                             loop ())
 875     in
 876         loop ();
 877         OpenSSL.shutdown sock
 878     end
 879
 880 fun listBasis () =
 881     let
 882         val dir = Posix.FileSys.opendir Config.libRoot
 883
 884         fun loop files =
 885             case Posix.FileSys.readdir dir of
 886                 NONE => (Posix.FileSys.closedir dir;
 887                          files)
 888               | SOME fname =>
 889                 if String.isSuffix ".dtl" fname then
 890                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
 891                                                file = fname}
 892                           :: files)
 893                 else
 894                     loop files
 895     in
 896         loop []
 897     end
 898
 899 fun autodocBasis outdir =
 900     Autodoc.autodoc {outdir = outdir, infiles = listBasis ()}
 901
 902 end