webcit/auth.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles authentication of users to a Citadel server.
   5  *
   6  */
   7
   8
   9 #include <ctype.h>
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <signal.h>
  15 #include <sys/types.h>
  16 #include <sys/wait.h>
  17 #include <sys/socket.h>
  18 #include <sys/time.h>
  19 #include <limits.h>
  20 #include <netinet/in.h>
  21 #include <netdb.h>
  22 #include <string.h>
  23 #include <pwd.h>
  24 #include <errno.h>
  25 #include <stdarg.h>
  26 #include <pthread.h>
  27 #include <signal.h>
  28 #include "webcit.h"
  29
  30 char *axdefs[] =
  31 {
  32         "Deleted",
  33         "New User",
  34         "Problem User",
  35         "Local User",
  36         "Network User",
  37         "Preferred User",
  38         "Aide"
  39 };
  40
  41 /*
  42  * Display the login screen
  43  */
  44 void display_login(char *mesg)
  45 {
  46         char buf[SIZ];
  47
  48         output_headers(1, 1, 2, 0, 0, 0, 0);
  49         wprintf("<div style=\"position:absolute; top:20px; left:20px; right:20px\">\n");
  50
  51         if (mesg != NULL) if (strlen(mesg) > 0) {
  52                 stresc(buf, mesg, 0, 0);
  53                 svprintf("mesg", WCS_STRING, "%s", buf);
  54         }
  55
  56         svprintf("hello", WCS_SERVCMD, "MESG hello");
  57         svprintf("BOXTITLE", WCS_STRING, "%s - powered by Citadel",
  58                 serv_info.serv_humannode);
  59
  60         do_template("login");
  61
  62         wDumpContent(2);
  63 }
  64
  65
  66
  67
  68 /*
  69  * This function needs to get called whenever the session changes from
  70  * not-logged-in to logged-in, either by an explicit login by the user or
  71  * by a timed-out session automatically re-establishing with a little help
  72  * from the browser cookie.  Either way, we need to load access controls and
  73  * preferences from the server.
  74  */
  75 void become_logged_in(char *user, char *pass, char *serv_response)
  76 {
  77         char buf[SIZ];
  78
  79         WC->logged_in = 1;
  80         extract(WC->wc_username, &serv_response[4], 0);
  81         strcpy(WC->wc_password, pass);
  82         WC->axlevel = extract_int(&serv_response[4], 1);
  83         if (WC->axlevel >= 6) {
  84                 WC->is_aide = 1;
  85         }
  86
  87         load_preferences();
  88
  89         serv_puts("CHEK");
  90         serv_gets(buf);
  91         if (buf[0] == '2') {
  92                 WC->new_mail = extract_int(&buf[4], 0);
  93                 WC->need_regi = extract_int(&buf[4], 1);
  94                 WC->need_vali = extract_int(&buf[4], 2);
  95                 extract(WC->cs_inet_email, &buf[4], 3);
  96         }
  97 }
  98
  99
 100 void do_login(void)
 101 {
 102         char buf[SIZ];
 103
 104         if (!strcasecmp(bstr("action"), "Exit")) {
 105                 do_logout();
 106                 return;
 107         }
 108         if (!strcasecmp(bstr("action"), "Login")) {
 109                 serv_printf("USER %s", bstr("name"));
 110                 serv_gets(buf);
 111                 if (buf[0] == '3') {
 112                         serv_printf("PASS %s", bstr("pass"));
 113                         serv_gets(buf);
 114                         if (buf[0] == '2') {
 115                                 become_logged_in(bstr("name"),
 116                                                  bstr("pass"), buf);
 117                         } else {
 118                                 display_login(&buf[4]);
 119                                 return;
 120                         }
 121                 } else {
 122                         display_login(&buf[4]);
 123                         return;
 124                 }
 125         }
 126         if (!strcasecmp(bstr("action"), "New User")) {
 127                 if (strlen(bstr("pass")) == 0) {
 128                         display_login("Blank passwords are not allowed.");
 129                         return;
 130                 }
 131                 serv_printf("NEWU %s", bstr("name"));
 132                 serv_gets(buf);
 133                 if (buf[0] == '2') {
 134                         become_logged_in(bstr("name"), bstr("pass"), buf);
 135                         serv_printf("SETP %s", bstr("pass"));
 136                         serv_gets(buf);
 137                 } else {
 138                         display_login(&buf[4]);
 139                         return;
 140                 }
 141         }
 142         if (WC->logged_in) {
 143                 if (WC->need_regi) {
 144                         display_reg(1);
 145                 } else {
 146                         do_welcome();
 147                 }
 148         } else {
 149                 display_login("Your password was not accepted.");
 150         }
 151
 152 }
 153
 154 void do_welcome(void)
 155 {
 156         char buf[SIZ];
 157         FILE *fp;
 158         int i;
 159
 160 #ifdef XXX_NOT_FINISHED_YET_XXX
 161         /*
 162          * See if we have to run the first-time setup wizard
 163          */
 164         if (WC->is_aide) {
 165                 if (!setup_wizard) {
 166                         sprintf(wizard_filename, "setupwiz.%s.%s",
 167                                 ctdlhost, ctdlport);
 168                         for (i=0; i<strlen(wizard_filename); ++i) {
 169                                 if (    (wizard_filename[i]==' ')
 170                                         || (wizard_filename[i] == '/')
 171                                 ) {
 172                                         wizard_filename[i] = '_';
 173                                 }
 174                         }
 175
 176                         fp = fopen(wizard_filename, "r");
 177                         if (fp != NULL) {
 178                                 fgets(buf, sizeof buf, fp);
 179                                 buf[strlen(buf)-1] = 0;
 180                                 fclose(fp);
 181                                 if (atoi(buf) == serv_info.serv_rev_level) {
 182                                         setup_wizard = 1; /* already run */
 183                                 }
 184                         }
 185                 }
 186
 187                 if (!setup_wizard) {
 188                         http_redirect("/setup_wizard");
 189                 }
 190         }
 191 #endif
 192
 193         /*
 194          * Go to the user's preferred start page
 195          */
 196         get_preference("startpage", buf);
 197         if (strlen(buf)==0) {
 198                 strcpy(buf, "/dotskip&room=_BASEROOM_");
 199                 set_preference("startpage", buf);
 200         }
 201         http_redirect(buf);
 202 }
 203
 204
 205 /*
 206  * Disconnect from the Citadel server, and end this WebCit session
 207  */
 208 void end_webcit_session(void) {
 209         serv_puts("QUIT");
 210         WC->killthis = 1;
 211         /* close() of citadel socket will be done by do_housekeeping() */
 212 }
 213
 214
 215 void do_logout(void)
 216 {
 217         char buf[SIZ];
 218
 219         strcpy(WC->wc_username, "");
 220         strcpy(WC->wc_password, "");
 221         strcpy(WC->wc_roomname, "");
 222
 223         /* Calling output_headers() this way causes the cookies to be un-set */
 224         output_headers(1, 1, 0, 1, 0, 0, 0);
 225
 226         wprintf("<center>");
 227         serv_puts("MESG goodbye");
 228         serv_gets(buf);
 229
 230         if (WC->serv_sock >= 0) {
 231                 if (buf[0] == '1') {
 232                         fmout(NULL, "CENTER");
 233                 } else {
 234                         wprintf("Goodbye\n");
 235                 }
 236         }
 237         else {
 238                 wprintf("This program was unable to connect or stay "
 239                         "connected to the Citadel server.  Please report "
 240                         "this problem to your system administrator."
 241                 );
 242         }
 243
 244         wprintf("<hr /><a href=\"/\">Log in again</A>&nbsp;&nbsp;&nbsp;"
 245                 "<a href=\"javascript:window.close();\">Close window</A>"
 246                 "</center>\n");
 247         wDumpContent(2);
 248         end_webcit_session();
 249 }
 250
 251
 252 /*
 253  * validate new users
 254  */
 255 void validate(void)
 256 {
 257         char cmd[SIZ];
 258         char user[SIZ];
 259         char buf[SIZ];
 260         int a;
 261
 262         output_headers(1, 1, 2, 0, 0, 0, 0);
 263         wprintf("<div id=\"banner\">\n"
 264                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 265                 "<SPAN CLASS=\"titlebar\">Validate new users</SPAN>"
 266                 "</TD></TR></TABLE>\n"
 267                 "</div>\n<div id=\"content\">\n"
 268         );
 269
 270         strcpy(buf, bstr("user"));
 271         if (strlen(buf) > 0)
 272                 if (strlen(bstr("axlevel")) > 0) {
 273                         serv_printf("VALI %s|%s", buf, bstr("axlevel"));
 274                         serv_gets(buf);
 275                         if (buf[0] != '2') {
 276                                 wprintf("<b>%s</b><br />\n", &buf[4]);
 277                         }
 278                 }
 279         serv_puts("GNUR");
 280         serv_gets(buf);
 281
 282         if (buf[0] != '3') {
 283                 wprintf("<b>%s</b><br />\n", &buf[4]);
 284                 wDumpContent(1);
 285                 return;
 286         }
 287
 288         wprintf("<div id=\"fix_scrollbar_bug\">"
 289                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>\n");
 290         wprintf("<center>");
 291
 292         strcpy(user, &buf[4]);
 293         serv_printf("GREG %s", user);
 294         serv_gets(cmd);
 295         if (cmd[0] == '1') {
 296                 a = 0;
 297                 do {
 298                         serv_gets(buf);
 299                         ++a;
 300                         if (a == 1)
 301                                 wprintf("User #%s<br /><H1>%s</H1>",
 302                                         buf, &cmd[4]);
 303                         if (a == 2)
 304                                 wprintf("PW: %s<br />\n", buf);
 305                         if (a == 3)
 306                                 wprintf("%s<br />\n", buf);
 307                         if (a == 4)
 308                                 wprintf("%s<br />\n", buf);
 309                         if (a == 5)
 310                                 wprintf("%s, ", buf);
 311                         if (a == 6)
 312                                 wprintf("%s ", buf);
 313                         if (a == 7)
 314                                 wprintf("%s<br />\n", buf);
 315                         if (a == 8)
 316                                 wprintf("%s<br />\n", buf);
 317                         if (a == 9)
 318                                 wprintf("Current access level: %d (%s)\n",
 319                                         atoi(buf), axdefs[atoi(buf)]);
 320                 } while (strcmp(buf, "000"));
 321         } else {
 322                 wprintf("<H1>%s</H1>%s<br />\n", user, &cmd[4]);
 323         }
 324
 325         wprintf("<hr />Select access level for this user:<br />\n");
 326         for (a = 0; a <= 6; ++a) {
 327                 wprintf("<A HREF=\"/validate&user=");
 328                 urlescputs(user);
 329                 wprintf("&axlevel=%d\">%s</A>&nbsp;&nbsp;&nbsp;\n",
 330                         a, axdefs[a]);
 331         }
 332         wprintf("<br />\n");
 333
 334         wprintf("</CENTER>\n");
 335         wprintf("</td></tr></table></div>\n");
 336         wDumpContent(1);
 337 }
 338
 339
 340
 341 /*
 342  * Display form for registration.
 343  * (Set during_login to 1 if this registration is being performed during
 344  * new user login and will require chaining to the proper screen.)
 345  */
 346 void display_reg(int during_login)
 347 {
 348         long vcard_msgnum;
 349
 350         if (goto_config_room() != 0) {
 351                 if (during_login) do_welcome();
 352                 else display_main_menu();
 353                 return;
 354         }
 355
 356         vcard_msgnum = locate_user_vcard(WC->wc_username, -1);
 357         if (vcard_msgnum < 0L) {
 358                 if (during_login) do_welcome();
 359                 else display_main_menu();
 360                 return;
 361         }
 362
 363         if (during_login) {
 364                 do_edit_vcard(vcard_msgnum, "1", "/do_welcome");
 365         }
 366         else {
 367                 do_edit_vcard(vcard_msgnum, "1", "/display_main_menu");
 368         }
 369
 370 }
 371
 372
 373
 374
 375 /*
 376  * display form for changing your password
 377  */
 378 void display_changepw(void)
 379 {
 380         char buf[SIZ];
 381
 382         output_headers(1, 1, 2, 0, 0, 0, 0);
 383         wprintf("<div id=\"banner\">\n"
 384                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 385                 "<SPAN CLASS=\"titlebar\">Change your password</SPAN>"
 386                 "</TD></TR></TABLE>\n"
 387                 "</div>\n<div id=\"content\">\n"
 388         );
 389
 390         if (strlen(WC->ImportantMessage) > 0) {
 391                 do_template("beginbox_nt");
 392                 wprintf("<SPAN CLASS=\"errormsg\">"
 393                         "%s</SPAN><br />\n", WC->ImportantMessage);
 394                 do_template("endbox");
 395                 strcpy(WC->ImportantMessage, "");
 396         }
 397
 398         wprintf("<div id=\"fix_scrollbar_bug\">"
 399                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>\n");
 400
 401         wprintf("<CENTER><br />");
 402         serv_puts("MESG changepw");
 403         serv_gets(buf);
 404         if (buf[0] == '1') {
 405                 fmout(NULL, "CENTER");
 406         }
 407
 408         wprintf("<form name=\"changepwform\" action=\"changepw\" method=\"post\">\n");
 409         wprintf("<CENTER>"
 410                 "<table border=\"0\" cellspacing=\"5\" cellpadding=\"5\" "
 411                 "BGCOLOR=\"#EEEEEE\">"
 412                 "<TR><TD>Enter new password:</TD>\n");
 413         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass1\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 414         wprintf("<TR><TD>Enter it again to confirm:</TD>\n");
 415         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass2\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 416
 417         wprintf("</TABLE><br />\n");
 418         wprintf("<INPUT type=\"submit\" name=\"action\" value=\"Change\">"
 419                 "&nbsp;"
 420                 "<INPUT type=\"submit\" name=\"action\" value=\"Cancel\">\n");
 421         wprintf("</form></center>\n");
 422         wprintf("</td></tr></table></div>\n");
 423         wDumpContent(1);
 424 }
 425
 426 /*
 427  * change password
 428  */
 429 void changepw(void)
 430 {
 431         char buf[SIZ];
 432         char newpass1[32], newpass2[32];
 433
 434         if (strcmp(bstr("action"), "Change")) {
 435                 strcpy(WC->ImportantMessage,
 436                         "Cancelled.  Password was not changed.");
 437                 display_main_menu();
 438                 return;
 439         }
 440
 441         strcpy(newpass1, bstr("newpass1"));
 442         strcpy(newpass2, bstr("newpass2"));
 443
 444         if (strcasecmp(newpass1, newpass2)) {
 445                 strcpy(WC->ImportantMessage,
 446                         "They don't match.  Password was not changed.");
 447                 display_changepw();
 448                 return;
 449         }
 450
 451         if (strlen(newpass1) == 0) {
 452                 strcpy(WC->ImportantMessage,
 453                         "Blank passwords are not allowed.");
 454                 display_changepw();
 455                 return;
 456         }
 457
 458         serv_printf("SETP %s", newpass1);
 459         serv_gets(buf);
 460         sprintf(WC->ImportantMessage, "%s", &buf[4]);
 461         if (buf[0] == '2') {
 462                 safestrncpy(WC->wc_password, buf, sizeof WC->wc_password);
 463                 display_main_menu();
 464         }
 465         else {
 466                 display_changepw();
 467         }
 468 }