src/main/auth.c

   1 /*
   2  * auth.c       User authentication.
   3  *
   4  * Version:     $Id$
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  * Copyright 2000  The FreeRADIUS server project
  21  * Copyright 2000  Miquel van Smoorenburg <miquels@cistron.nl>
  22  * Copyright 2000  Jeff Carneal <jeff@apex.net>
  23  */
  24
  25 static const char rcsid[] = "$Id$";
  26
  27 #include "autoconf.h"
  28 #include "libradius.h"
  29
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <ctype.h>
  33
  34 #if HAVE_NETINET_IN_H
  35 #       include <netinet/in.h>
  36 #endif
  37
  38 #include "radiusd.h"
  39 #include "modules.h"
  40
  41 /*
  42  *      Return a short string showing the terminal server, port
  43  *      and calling station ID.
  44  */
  45 char *auth_name(char *buf, size_t buflen, REQUEST *request, int do_cli) {
  46         VALUE_PAIR      *cli;
  47         VALUE_PAIR      *pair;
  48         int             port = 0;
  49
  50         if ((cli = pairfind(request->packet->vps, PW_CALLING_STATION_ID)) == NULL)
  51                 do_cli = 0;
  52         if ((pair = pairfind(request->packet->vps, PW_NAS_PORT)) != NULL)
  53                 port = pair->lvalue;
  54
  55         snprintf(buf, buflen, "from client %.128s port %u%s%.128s",
  56                         client_name(request->packet->src_ipaddr), port,
  57                         (do_cli ? " cli " : ""), (do_cli ? (char *)cli->strvalue : ""));
  58
  59         return buf;
  60 }
  61
  62
  63 /*
  64  *      Check if account has expired, and if user may login now.
  65  */
  66 static int check_expiration(REQUEST *request)
  67 {
  68         int result;
  69         VALUE_PAIR *check_item = request->config_items;
  70
  71         result = 0;
  72         while (result == 0 && check_item != NULL) {
  73
  74                 /*
  75                  *      Check expiration date if we are doing password aging.
  76                  */
  77                 if (check_item->attribute == PW_EXPIRATION) {
  78                         /*
  79                          *      Has this user's password expired?
  80                          *
  81                          *      If so, remove ALL reply attributes,
  82                          *      and add our own Reply-Message, saying
  83                          *      why they're being rejected.
  84                          */
  85                         if (check_item->lvalue < (unsigned) time(NULL)) {
  86                                 VALUE_PAIR *vp;
  87
  88                                 result = -1;
  89                                 vp = pairmake("Reply-Message",
  90                                                 "Password Has Expired\r\n",
  91                                                 T_OP_ADD);
  92                                 pairfree(&request->reply->vps);
  93                                 request->reply->vps = vp;
  94                                 break;
  95                         }
  96                 }
  97                 check_item = check_item->next;
  98         }
  99         return result;
 100 }
 101
 102
 103 /*
 104  * Make sure user/pass are clean
 105  * and then log them
 106  */
 107 static int rad_authlog(const char *msg, REQUEST *request, int goodpass) {
 108
 109         char clean_password[1024];
 110         char clean_username[1024];
 111         char buf[1024];
 112         VALUE_PAIR *username = NULL;
 113
 114         if (!mainconfig.log_auth) {
 115                 return 0;
 116         }
 117
 118         /*
 119          * Get the correct username based on the configured value
 120          */
 121         if (log_stripped_names == 0) {
 122                 username = pairfind(request->packet->vps, PW_USER_NAME);
 123         } else {
 124                 username = request->username;
 125         }
 126
 127         /*
 128          *      Clean up the username
 129          */
 130         if (username == NULL) {
 131                 strcpy(clean_username, "<no User-Name attribute>");
 132         } else {
 133                 librad_safeprint((char *)username->strvalue,
 134                                 username->length,
 135                                 clean_username, sizeof(clean_username));
 136         }
 137
 138         /*
 139          *      Clean up the password
 140          */
 141         if (mainconfig.log_auth_badpass || mainconfig.log_auth_goodpass) {
 142                 if (!request->password) {
 143                         strcpy(clean_password, "<no User-Password attribute>");
 144                 } else if (request->password->attribute == PW_CHAP_PASSWORD) {
 145                         strcpy(clean_password, "<CHAP-Password>");
 146                 } else {
 147                         librad_safeprint((char *)request->password->strvalue,
 148                                          request->password->length,
 149                                          clean_password, sizeof(clean_password));
 150                 }
 151         }
 152
 153         if (goodpass) {
 154                 radlog(L_AUTH, "%s: [%s%s%s] (%s)",
 155                                 msg,
 156                                 clean_username,
 157                                 mainconfig.log_auth_goodpass ? "/" : "",
 158                                 mainconfig.log_auth_goodpass ? clean_password : "",
 159                                 auth_name(buf, sizeof(buf), request, 1));
 160         } else {
 161                 radlog(L_AUTH, "%s: [%s%s%s] (%s)",
 162                                 msg,
 163                                 clean_username,
 164                                 mainconfig.log_auth_badpass ? "/" : "",
 165                                 mainconfig.log_auth_badpass ? clean_password : "",
 166                                 auth_name(buf, sizeof(buf), request, 1));
 167         }
 168
 169         return 0;
 170 }
 171
 172 /*
 173  *      Check password.
 174  *
 175  *      Returns:        0  OK
 176  *                      -1 Password fail
 177  *                      -2 Rejected (Auth-Type = Reject, send Port-Message back)
 178  *                      1  End check & return, don't reply
 179  *
 180  *      NOTE: NOT the same as the RLM_ values !
 181  */
 182 int rad_check_password(REQUEST *request)
 183 {
 184         VALUE_PAIR *auth_type_pair;
 185         VALUE_PAIR *cur_config_item;
 186         VALUE_PAIR *password_pair;
 187         VALUE_PAIR *auth_item;
 188         char string[MAX_STRING_LEN];
 189         int auth_type = -1;
 190         int result;
 191         int auth_type_count = 0;
 192         result = 0;
 193
 194         /*
 195          *      Look for matching check items. We skip the whole lot
 196          *      if the authentication type is PW_AUTHTYPE_ACCEPT or
 197          *      PW_AUTHTYPE_REJECT.
 198          */
 199         cur_config_item = request->config_items;
 200         while(((auth_type_pair = pairfind(cur_config_item, PW_AUTH_TYPE))) != NULL) {
 201                 auth_type = auth_type_pair->lvalue;
 202                 auth_type_count++;
 203
 204                 DEBUG2("  rad_check_password:  Found Auth-Type %s",
 205                                 auth_type_pair->strvalue);
 206                 cur_config_item = auth_type_pair->next;
 207
 208                 if (auth_type == PW_AUTHTYPE_REJECT) {
 209                         DEBUG2("  rad_check_password: Auth-Type = Reject, rejecting user");
 210                         return -2;
 211                 }
 212         }
 213
 214         if (( auth_type_count > 1) && (debug_flag)) {
 215                 radlog(L_ERR, "Warning:  Found %d auth-types on request for user '%s'",
 216                         auth_type_count, request->username->strvalue);
 217         }
 218
 219         /*
 220          *      This means we have a proxy reply or an accept
 221          *  and it wasn't rejected in the above loop.  So
 222          *  that means it is accepted and we do no further
 223          *  authentication
 224          */
 225         if ((auth_type == PW_AUTHTYPE_ACCEPT) || (request->proxy)) {
 226                 DEBUG2("  rad_check_password: Auth-Type = Accept, accepting the user");
 227                 return 0;
 228         }
 229
 230         /*
 231          *      Find the password from the users file.
 232          */
 233         if ((password_pair = pairfind(request->config_items, PW_CRYPT_PASSWORD)) != NULL)
 234                 auth_type = PW_AUTHTYPE_CRYPT;
 235         else
 236                 password_pair = pairfind(request->config_items, PW_PASSWORD);
 237
 238         if (auth_type < 0) {
 239                 if (password_pair) {
 240                         auth_type = PW_AUTHTYPE_LOCAL;
 241                 } else {
 242                         /*
 243                         *       The admin hasn't told us how to
 244                         *       authenticate the user, so we reject them!
 245                         *
 246                         *       This is fail-safe.
 247                         */
 248                         DEBUG2("auth: No authenticate method (Auth-Type) configuration found for the request: Rejecting the user");
 249                         return -2;
 250                 }
 251         }
 252
 253         switch(auth_type) {
 254                 case PW_AUTHTYPE_CRYPT:
 255                         /*
 256                          *      Find the password sent by the user. It
 257                          *      SHOULD be there, if it's not
 258                          *      authentication fails.
 259                          */
 260                         auth_item = request->password;
 261                         if (auth_item == NULL) {
 262                                 DEBUG2("auth: No User-Password or CHAP-Password attribute in the request");
 263                                 return -1;
 264                         }
 265
 266                         DEBUG2("auth: type Crypt");
 267                         if (password_pair == NULL) {
 268                                 DEBUG2("No Crypt-Password configured for the user");
 269                                 rad_authlog("Login incorrect "
 270                                         "(No Crypt-Password configured for the user)", request, 0);
 271                                 return -1;
 272                         }
 273
 274                         switch (lrad_crypt_check((char *)auth_item->strvalue,
 275                                                                          (char *)password_pair->strvalue)) {
 276                         case -1:
 277                           rad_authlog("Login incorrect "
 278                                                   "(system failed to supply an encrypted password for comparison)", request, 0);
 279                         case 1:
 280                           return -1;
 281                         }
 282                         break;
 283                 case PW_AUTHTYPE_LOCAL:
 284                         DEBUG2("auth: type Local");
 285
 286                         /*
 287                          *      Find the password sent by the user. It
 288                          *      SHOULD be there, if it's not
 289                          *      authentication fails.
 290                          */
 291                         auth_item = request->password;
 292                         if (auth_item == NULL) {
 293                                 DEBUG2("auth: No User-Password or CHAP-Password attribute in the request");
 294                                 return -1;
 295                         }
 296
 297                         /*
 298                          *      Plain text password.
 299                          */
 300                         if (password_pair == NULL) {
 301                                 DEBUG2("auth: No password configured for the user");
 302                                 rad_authlog("Login incorrect "
 303                                         "(No password configured for the user)", request, 0);
 304                                 return -1;
 305                         }
 306
 307                         /*
 308                          *      Local password is just plain text.
 309                          */
 310                         if (auth_item->attribute == PW_PASSWORD) {
 311                                 if (strcmp((char *)password_pair->strvalue,
 312                                            (char *)auth_item->strvalue) != 0) {
 313                                         DEBUG2("auth: user supplied User-Password does NOT match local User-Password");
 314                                         return -1;
 315                                 }
 316                                 DEBUG2("auth: user supplied User-Password matches local User-Password");
 317                                 break;
 318
 319                         } else if (auth_item->attribute != PW_CHAP_PASSWORD) {
 320                                 DEBUG2("The user did not supply a User-Password or a CHAP-Password attribute");
 321                                 rad_authlog("Login incorrect "
 322                                         "(no User-Password or CHAP-Password attribute)", request, 0);
 323                                 return -1;
 324                         }
 325
 326                         rad_chap_encode(request->packet, string,
 327                                         auth_item->strvalue[0], password_pair);
 328
 329                         /*
 330                          *      Compare them
 331                          */
 332                         if (memcmp(string + 1, auth_item->strvalue + 1,
 333                                    CHAP_VALUE_LENGTH) != 0) {
 334                                 DEBUG2("auth: user supplied CHAP-Password does NOT match local User-Password");
 335                                 return -1;
 336                         }
 337                         DEBUG2("auth: user supplied CHAP-Password matches local User-Password");
 338                         break;
 339                 default:
 340                         DEBUG2("auth: type \"%s\"",
 341                                         dict_valbyattr(PW_AUTH_TYPE, auth_type)->name);
 342                         /*
 343                          *      See if there is a module that handles
 344                          *      this type, and turn the RLM_ return
 345                          *      status into the values as defined at
 346                          *      the top of this function.
 347                          */
 348                         result = module_authenticate(auth_type, request);
 349                         switch (result) {
 350                                 /*
 351                                  *      An authentication module FAIL
 352                                  *      return code, or any return code that
 353                                  *      is not expected from authentication,
 354                                  *      is the same as an explicit REJECT!
 355                                  */
 356                                 case RLM_MODULE_FAIL:
 357                                 case RLM_MODULE_REJECT:
 358                                 case RLM_MODULE_USERLOCK:
 359                                 case RLM_MODULE_INVALID:
 360                                 case RLM_MODULE_NOTFOUND:
 361                                 case RLM_MODULE_NOOP:
 362                                 case RLM_MODULE_UPDATED:
 363                                         result = -1;
 364                                         break;
 365                                 case RLM_MODULE_OK:
 366                                         result = 0;
 367                                         break;
 368                                 case RLM_MODULE_HANDLED:
 369                                         result = 1;
 370                                         break;
 371                         }
 372                         break;
 373         }
 374
 375         return result;
 376 }
 377
 378 /*
 379  *      Process and reply to an authentication request
 380  *
 381  *      The return value of this function isn't actually used right now, so
 382  *      it's not entirely clear if it is returning the right things. --Pac.
 383  */
 384 int rad_authenticate(REQUEST *request)
 385 {
 386         VALUE_PAIR      *namepair;
 387         VALUE_PAIR      *check_item;
 388         VALUE_PAIR      *reply_item;
 389         VALUE_PAIR      *auth_item;
 390         VALUE_PAIR      *module_msg;
 391         VALUE_PAIR      *tmp = NULL;
 392         VALUE_PAIR      *autz_type_item = NULL;
 393         VALUE_PAIR      *postauth_type_item = NULL;
 394         int             result, r;
 395         char            umsg[MAX_STRING_LEN + 1];
 396         const char      *user_msg = NULL;
 397         const char      *password;
 398         char            *exec_program;
 399         int             exec_wait;
 400         int             seen_callback_id;
 401         char            buf[1024], logstr[1024];
 402         char            autz_retry = 0;
 403         int             autz_type = 0;
 404         int             postauth_type = 0;
 405
 406         password = "";
 407
 408         /*
 409          *      If this request got proxied to another server,
 410          *      AND it was an authentication request, then we need
 411          *      to add an initial Auth-Type: Auth-Accept for success,
 412          *      Auth-Reject for fail. We also need to add the reply
 413          *      pairs from the server to the initial reply.
 414          */
 415         if ((request->proxy_reply) &&
 416             (request->packet->code == PW_AUTHENTICATION_REQUEST)) {
 417                 tmp = paircreate(PW_AUTH_TYPE, PW_TYPE_INTEGER);
 418                 if (tmp == NULL) {
 419                         radlog(L_ERR|L_CONS, "no memory");
 420                         exit(1);
 421                 }
 422
 423                 /*
 424                  *      Challenges are punted back to the NAS
 425                  *      without any further processing.
 426                  */
 427                 if (request->proxy_reply->code == PW_ACCESS_CHALLENGE) {
 428                         request->reply->code = PW_ACCESS_CHALLENGE;
 429                         return RLM_MODULE_HANDLED;
 430                 }
 431
 432                 /*
 433                  *      Reply of ACCEPT means accept, ALL other
 434                  *      replies mean reject.  This is fail-safe.
 435                  */
 436                 if (request->proxy_reply->code == PW_AUTHENTICATION_ACK)
 437                         tmp->lvalue = PW_AUTHTYPE_ACCEPT;
 438                 else
 439                         tmp->lvalue = PW_AUTHTYPE_REJECT;
 440                 pairadd(&request->config_items, tmp);
 441
 442                 /*
 443                  *      If it's an Access-Reject, then do NOT do any
 444                  *      authorization or authentication.  They're being
 445                  *      rejected, so we minimize the amount of work
 446                  *      done by the server, by rejecting them here.
 447                  */
 448                 if ((request->proxy_reply->code != PW_AUTHENTICATION_ACK) &&
 449                     (request->proxy_reply->code != PW_ACCESS_CHALLENGE)) {
 450                         rad_authlog("Login incorrect (Home Server says so)", request, 0);
 451                         request->reply->code = PW_AUTHENTICATION_REJECT;
 452                         return RLM_MODULE_REJECT;
 453                 }
 454         }
 455
 456         /*
 457          *      Get the username from the request.
 458          *
 459          *      Note that namepair MAY be NULL, in which case there
 460          *      is no User-Name attribute in the request.
 461          */
 462         namepair = request->username;
 463
 464         /*
 465          *      Look for, and cache, passwords.
 466          */
 467         if (!request->password) {
 468                 request->password = pairfind(request->packet->vps,
 469                                              PW_PASSWORD);
 470         }
 471
 472         /*
 473          *      Discover which password we want to use.
 474          */
 475         auth_item = request->password;
 476         if (auth_item) {
 477                 password = (const char *)auth_item->strvalue;
 478
 479         } else {
 480                 /*
 481                  *      Maybe there's a CHAP-Password?
 482                  */
 483                 if ((auth_item = pairfind(request->packet->vps,
 484                                 PW_CHAP_PASSWORD)) != NULL) {
 485                         password = "<CHAP-PASSWORD>";
 486
 487                 } else {
 488                         /*
 489                          *      No password we recognize.
 490                          */
 491                         password = "<NO-PASSWORD>";
 492                 }
 493         }
 494         request->password = auth_item;
 495
 496         /*
 497          *      Get the user's authorization information from the database
 498          */
 499 autz_redo:
 500         r = module_authorize(autz_type, request);
 501         if (r != RLM_MODULE_NOTFOUND &&
 502             r != RLM_MODULE_NOOP &&
 503             r != RLM_MODULE_OK &&
 504             r != RLM_MODULE_UPDATED) {
 505                 if (r != RLM_MODULE_FAIL && r != RLM_MODULE_HANDLED) {
 506                         if ((module_msg = pairfind(request->packet->vps,
 507                                         PW_MODULE_FAILURE_MESSAGE)) != NULL){
 508                                 char msg[MAX_STRING_LEN+16];
 509                                 snprintf(msg, sizeof(msg), "Invalid user (%s)",
 510                                          module_msg->strvalue);
 511                                 rad_authlog(msg,request,0);
 512                         } else {
 513                                 rad_authlog("Invalid user", request, 0);
 514                         }
 515                         request->reply->code = PW_AUTHENTICATION_REJECT;
 516                 }
 517
 518                 /*
 519                  *      Hope that the module returning REJECT is smart
 520                  *      enough to do pairfre(&request->reply->vps)...
 521                  */
 522                 return r;
 523         }
 524         if (!autz_retry){
 525                 autz_type_item = pairfind(request->config_items, PW_AUTZ_TYPE);
 526                 if (autz_type_item){
 527                         autz_type = autz_type_item->lvalue;
 528                         autz_retry = 1;
 529                         goto autz_redo;
 530                 }
 531         }
 532
 533
 534         /*
 535          *      If we haven't already proxied the packet, then check
 536          *      to see if we should.  Maybe one of the authorize
 537          *      modules has decided that a proxy should be used. If
 538          *      so, get out of here and send the packet.
 539          */
 540         if ((request->proxy == NULL) &&
 541                         (pairfind(request->config_items, PW_PROXY_TO_REALM) != NULL)) {
 542                 return RLM_MODULE_OK;
 543         }
 544
 545         /*
 546          *      Perhaps there is a Stripped-User-Name now.
 547          */
 548         namepair = request->username;
 549
 550         /*
 551          *      Validate the user
 552          */
 553         do {
 554                 if ((result = check_expiration(request)) < 0)
 555                                 break;
 556                 result = rad_check_password(request);
 557                 if (result > 0) {
 558                         /* don't reply! */
 559                         return RLM_MODULE_HANDLED;
 560                 }
 561         } while(0);
 562
 563         /*
 564          *      Failed to validate the user.
 565          *
 566          *      We PRESUME that the code which failed will clean up
 567          *      request->reply->vps, to be ONLY the reply items it
 568          *      wants to send back.
 569          */
 570         if (result < 0) {
 571                 DEBUG2("auth: Failed to validate the user.");
 572                 request->reply->code = PW_AUTHENTICATION_REJECT;
 573
 574                 if ((module_msg = pairfind(request->packet->vps,PW_MODULE_FAILURE_MESSAGE)) != NULL){
 575                         char msg[MAX_STRING_LEN+19];
 576
 577                         snprintf(msg, sizeof(msg), "Login incorrect (%s)",
 578                                  module_msg->strvalue);
 579                         rad_authlog(msg, request, 0);
 580                 } else {
 581                         rad_authlog("Login incorrect", request, 0);
 582                 }
 583
 584                 /* double check: maybe the secret is wrong? */
 585                 if ((debug_flag > 1) && (auth_item != NULL) &&
 586                                 (auth_item->attribute == PW_PASSWORD)) {
 587                         u_char *p;
 588
 589                         p = auth_item->strvalue;
 590                         while (*p != '\0') {
 591                                 if (!isprint((int) *p)) {
 592                                         log_debug("  WARNING: Unprintable characters in the password.\n\t  Double-check the shared secret on the server and the NAS!");
 593                                         break;
 594                                 }
 595                                 p++;
 596                         }
 597                 }
 598         }
 599
 600         if (result >= 0 &&
 601                         (check_item = pairfind(request->config_items, PW_SIMULTANEOUS_USE)) != NULL) {
 602                 VALUE_PAIR      *session_type;
 603                 int             sess_type = 0;
 604
 605                 session_type = pairfind(request->config_items, PW_SESSION_TYPE);
 606                 if (session_type)
 607                         sess_type = session_type->lvalue;
 608
 609                 /*
 610                  *      User authenticated O.K. Now we have to check
 611                  *      for the Simultaneous-Use parameter.
 612                  */
 613                 if (namepair &&
 614                     (r = module_checksimul(sess_type,request, check_item->lvalue)) != 0) {
 615                         char mpp_ok = 0;
 616
 617                         if (r == 2){
 618                                 /* Multilink attempt. Check if port-limit > simultaneous-use */
 619                                 VALUE_PAIR *port_limit;
 620
 621                                 if ((port_limit = pairfind(request->reply->vps, PW_PORT_LIMIT)) != NULL &&
 622                                         port_limit->lvalue > check_item->lvalue){
 623                                         DEBUG2("main auth: MPP is OK");
 624                                         mpp_ok = 1;
 625                                 }
 626                         }
 627                         if (!mpp_ok){
 628                                 if (check_item->lvalue > 1) {
 629                                 snprintf(umsg, sizeof(umsg),
 630                                                         "\r\nYou are already logged in %d times  - access denied\r\n\n",
 631                                                         (int)check_item->lvalue);
 632                                         user_msg = umsg;
 633                                 } else {
 634                                         user_msg = "\r\nYou are already logged in - access denied\r\n\n";
 635                                 }
 636
 637                                 request->reply->code = PW_AUTHENTICATION_REJECT;
 638
 639                                 /*
 640                                  *      They're trying to log in too many times.
 641                                  *      Remove ALL reply attributes.
 642                                  */
 643                                 pairfree(&request->reply->vps);
 644                                 tmp = pairmake("Reply-Message", user_msg, T_OP_SET);
 645                                 request->reply->vps = tmp;
 646
 647                                 snprintf(logstr, sizeof(logstr), "Multiple logins (max %d) %s",
 648                                         check_item->lvalue,
 649                                         r == 2 ? "[MPP attempt]" : "");
 650                                 rad_authlog(logstr, request, 1);
 651
 652                                 result = -1;
 653                         }
 654                 }
 655         }
 656
 657         if (result >= 0 &&
 658             (check_item = pairfind(request->config_items, PW_LOGIN_TIME)) != NULL) {
 659
 660                 /*
 661                  *      Authentication is OK. Now see if this
 662                  *      user may login at this time of the day.
 663                  */
 664                 r = timestr_match((char *)check_item->strvalue,
 665                                   request->timestamp);
 666                 /*
 667                  *      Session-Timeout needs to be at least
 668                  *      60 seconds, some terminal servers
 669                  *      ignore smaller values.
 670                  */
 671                 if (r < 60) {
 672                         /*
 673                          *      User called outside allowed time interval.
 674                          */
 675                         result = -1;
 676                         user_msg = "You are calling outside your allowed timespan\r\n";
 677
 678                         request->reply->code = PW_AUTHENTICATION_REJECT;
 679                         pairfree(&request->reply->vps);
 680
 681                         tmp = pairmake("Reply-Message", user_msg, T_OP_SET);
 682                         request->reply->vps = tmp;
 683
 684                         snprintf(logstr, sizeof(logstr), "Outside allowed timespan (time allowed %s)",
 685                                  check_item->strvalue);
 686                         rad_authlog(logstr, request, 1);
 687
 688                 } else if (r > 0) {
 689
 690                         /*
 691                          *      User is allowed, but set Session-Timeout.
 692                          */
 693                         if ((reply_item = pairfind(request->reply->vps,
 694                                         PW_SESSION_TIMEOUT)) != NULL) {
 695                                 if (reply_item->lvalue > (unsigned) r)
 696                                         reply_item->lvalue = r;
 697                         } else {
 698                                 if ((reply_item = paircreate(
 699                                                 PW_SESSION_TIMEOUT,
 700                                                 PW_TYPE_INTEGER)) == NULL) {
 701                                         radlog(L_ERR|L_CONS, "no memory");
 702                                         exit(1);
 703                                 }
 704                                 reply_item->lvalue = r;
 705                                 pairadd(&request->reply->vps, reply_item);
 706                         }
 707                 }
 708         }
 709
 710         /*
 711          *      Result should be >= 0 here - if not, we return.
 712          */
 713         if (result < 0) {
 714                 return RLM_MODULE_OK;
 715         }
 716
 717         /*
 718          *      We might need this later.  The 'password' string
 719          *      is NOT used anywhere below here, except for logging,
 720          *      so it should be safe...
 721          */
 722         if ((auth_item != NULL) && (auth_item->attribute == PW_CHAP_PASSWORD)) {
 723                 password = "CHAP-Password";
 724         }
 725
 726         /*
 727          *      Add the port number to the Framed-IP-Address if
 728          *      vp->addport is set.
 729          */
 730         if (((tmp = pairfind(request->reply->vps,
 731                              PW_FRAMED_IP_ADDRESS)) != NULL) &&
 732             (tmp->flags.addport != 0)) {
 733                 VALUE_PAIR *vpPortId;
 734
 735                 /*
 736                  *  Find the NAS port ID.
 737                  */
 738                 if ((vpPortId = pairfind(request->packet->vps,
 739                                          PW_NAS_PORT)) != NULL) {
 740                   tmp->lvalue = htonl(ntohl(tmp->lvalue) + vpPortId->lvalue);
 741                   tmp->flags.addport = 0;
 742                   ip_ntoa(tmp->strvalue, tmp->lvalue);
 743                 } else {
 744                         DEBUG2("WARNING: No NAS-Port attribute in request.  CANNOT return a Framed-IP-Address + NAS-Port.\n");
 745                         pairdelete(&request->reply->vps, PW_FRAMED_IP_ADDRESS);
 746                 }
 747         }
 748
 749         /*
 750          *      See if we need to execute a program.
 751          *      FIXME: somehow cache this info, and only execute the
 752          *      program when we receive an Accounting-START packet.
 753          *      Only at that time we know dynamic IP etc.
 754          */
 755         exec_program = NULL;
 756         exec_wait = 0;
 757         if ((auth_item = pairfind(request->reply->vps, PW_EXEC_PROGRAM)) != NULL) {
 758                 exec_wait = 0;
 759                 exec_program = strdup((char *)auth_item->strvalue);
 760                 pairdelete(&request->reply->vps, PW_EXEC_PROGRAM);
 761         }
 762         if ((auth_item = pairfind(request->reply->vps, PW_EXEC_PROGRAM_WAIT)) != NULL) {
 763                 exec_wait = 1;
 764                 exec_program = strdup((char *)auth_item->strvalue);
 765                 pairdelete(&request->reply->vps, PW_EXEC_PROGRAM_WAIT);
 766         }
 767
 768         /*
 769          *      Hack - allow % expansion in certain value strings.
 770          *      This is nice for certain Exec-Program programs.
 771          */
 772         seen_callback_id = 0;
 773         if ((auth_item = pairfind(request->reply->vps, PW_CALLBACK_ID)) != NULL) {
 774                 seen_callback_id = 1;
 775                 radius_xlat(buf, sizeof(auth_item->strvalue),
 776                             (char *)auth_item->strvalue, request, NULL);
 777                 strNcpy((char *)auth_item->strvalue, buf,
 778                         sizeof(auth_item->strvalue));
 779                 auth_item->length = strlen((char *)auth_item->strvalue);
 780         }
 781
 782
 783         /*
 784          *      If we want to exec a program, but wait for it,
 785          *      do it first before sending the reply.
 786          */
 787         if (exec_program && exec_wait) {
 788                 r = radius_exec_program(exec_program, request,
 789                                         exec_wait,
 790                                         umsg, sizeof(umsg),
 791                                         request->packet->vps, &tmp);
 792                 free(exec_program);
 793                 exec_program = NULL;
 794
 795                 /*
 796                  *      Always add the value-pairs to the reply.
 797                  */
 798                 pairmove(&request->reply->vps, &tmp);
 799                 pairfree(&tmp);
 800
 801                 if (r != 0) {
 802                         /*
 803                          *      Error. radius_exec_program() returns -1 on
 804                          *      fork/exec errors, or >0 if the exec'ed program
 805                          *      had a non-zero exit status.
 806                          */
 807                         if (umsg[0] == '\0') {
 808                                 user_msg = "\r\nAccess denied (external check failed).";
 809                         } else {
 810                                 user_msg = &umsg[0];
 811                         }
 812
 813                         request->reply->code = PW_AUTHENTICATION_REJECT;
 814                         tmp = pairmake("Reply-Message", user_msg, T_OP_SET);
 815
 816                         pairadd(&request->reply->vps, tmp);
 817                         rad_authlog("Login incorrect (external check failed)",
 818                                         request, 0);
 819
 820                         return RLM_MODULE_REJECT;
 821                 }
 822         }
 823
 824         /*
 825          *      Delete "normal" A/V pairs when using callback.
 826          *
 827          *      FIXME: This is stupid. The portmaster should accept
 828          *      these settings instead of insisting on using a
 829          *      dialout location.
 830          *
 831          *      FIXME2: Move this into the above exec thingy?
 832          *      (if you knew how I use the exec_wait, you'd understand).
 833          */
 834         if (seen_callback_id) {
 835                 pairdelete(&request->reply->vps, PW_FRAMED_PROTOCOL);
 836                 pairdelete(&request->reply->vps, PW_FRAMED_IP_ADDRESS);
 837                 pairdelete(&request->reply->vps, PW_FRAMED_IP_NETMASK);
 838                 pairdelete(&request->reply->vps, PW_FRAMED_ROUTE);
 839                 pairdelete(&request->reply->vps, PW_FRAMED_MTU);
 840                 pairdelete(&request->reply->vps, PW_FRAMED_COMPRESSION);
 841                 pairdelete(&request->reply->vps, PW_FILTER_ID);
 842                 pairdelete(&request->reply->vps, PW_PORT_LIMIT);
 843                 pairdelete(&request->reply->vps, PW_CALLBACK_NUMBER);
 844         }
 845
 846         /*
 847          *      Filter (possibly multiple) Reply-Message attributes
 848          *      through radius_xlat, modifying them in place.
 849          */
 850         if (user_msg == NULL) {
 851                 reply_item = pairfind(request->reply->vps, PW_REPLY_MESSAGE);
 852                 while (reply_item) {
 853                         radius_xlat(buf, sizeof(reply_item->strvalue),
 854                                     (char *)reply_item->strvalue, request, NULL);
 855                         strNcpy((char *)reply_item->strvalue, buf,
 856                                 sizeof(reply_item->strvalue));
 857                         reply_item->length = strlen((char *)reply_item->strvalue);
 858                         user_msg = NULL;
 859                         reply_item = pairfind(reply_item->next, PW_REPLY_MESSAGE);
 860                 }
 861         }
 862
 863         /*
 864          *      Set the reply to Access-Accept, if it hasn't already
 865          *      been set to something.  (i.e. Access-Challenge)
 866          */
 867         if (request->reply->code == 0)
 868           request->reply->code = PW_AUTHENTICATION_ACK;
 869
 870         if ((module_msg = pairfind(request->packet->vps,PW_MODULE_SUCCESS_MESSAGE)) != NULL){
 871                 char msg[MAX_STRING_LEN+12];
 872
 873                 snprintf(msg, sizeof(msg), "Login OK (%s)",
 874                          module_msg->strvalue);
 875                 rad_authlog(msg, request, 1);
 876         } else {
 877                 rad_authlog("Login OK", request, 1);
 878         }
 879
 880         if (exec_program && !exec_wait) {
 881                 /*
 882                  *      No need to check the exit status here.
 883                  */
 884                 radius_exec_program(exec_program, request, exec_wait,
 885                                     NULL, 0, request->packet->vps, NULL);
 886         }
 887
 888         if (exec_program)
 889                 free(exec_program);
 890
 891         /*
 892          *      Do post-authentication calls. ignoring the return code.
 893          *      If the post-authentication
 894          */
 895         postauth_type_item = pairfind(request->config_items, PW_POST_AUTH_TYPE);
 896         if (postauth_type_item)
 897                 postauth_type = postauth_type_item->lvalue;
 898         result = module_post_auth(postauth_type, request);
 899         switch (result) {
 900         default:
 901           break;
 902
 903           /*
 904            *    The module failed, or said to reject the user: Do so.
 905            */
 906         case RLM_MODULE_FAIL:
 907         case RLM_MODULE_REJECT:
 908         case RLM_MODULE_USERLOCK:
 909         case RLM_MODULE_INVALID:
 910           request->reply->code = PW_AUTHENTICATION_REJECT;
 911           result = RLM_MODULE_REJECT;
 912           break;
 913
 914           /*
 915            *    The module had a number of OK return codes.
 916            */
 917         case RLM_MODULE_NOTFOUND:
 918         case RLM_MODULE_NOOP:
 919         case RLM_MODULE_UPDATED:
 920         case RLM_MODULE_OK:
 921         case RLM_MODULE_HANDLED:
 922           result = RLM_MODULE_OK;
 923           break;
 924         }
 925
 926         return result;
 927 }