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         /*
 161          * See if we have to run the first-time setup wizard
 162          */
 163         if (WC->is_aide) {
 164                 if (!setup_wizard) {
 165                         sprintf(wizard_filename, "setupwiz.%s.%s",
 166                                 ctdlhost, ctdlport);
 167                         for (i=0; i<strlen(wizard_filename); ++i) {
 168                                 if (    (wizard_filename[i]==' ')
 169                                         || (wizard_filename[i] == '/')
 170                                 ) {
 171                                         wizard_filename[i] = '_';
 172                                 }
 173                         }
 174
 175                         fp = fopen(wizard_filename, "r");
 176                         if (fp != NULL) {
 177                                 fgets(buf, sizeof buf, fp);
 178                                 buf[strlen(buf)-1] = 0;
 179                                 fclose(fp);
 180                                 if (atoi(buf) == serv_info.serv_rev_level) {
 181                                         setup_wizard = 1; /* already run */
 182                                 }
 183                         }
 184                 }
 185
 186                 if (!setup_wizard) {
 187                         http_redirect("/setup_wizard");
 188                 }
 189         }
 190
 191         /*
 192          * Go to the user's preferred start page
 193          */
 194         get_preference("startpage", buf);
 195         if (strlen(buf)==0) {
 196                 strcpy(buf, "/dotskip&room=_BASEROOM_");
 197                 set_preference("startpage", buf);
 198         }
 199         http_redirect(buf);
 200 }
 201
 202
 203 /*
 204  * Disconnect from the Citadel server, and end this WebCit session
 205  */
 206 void end_webcit_session(void) {
 207         serv_puts("QUIT");
 208         WC->killthis = 1;
 209         /* close() of citadel socket will be done by do_housekeeping() */
 210 }
 211
 212
 213 void do_logout(void)
 214 {
 215         char buf[SIZ];
 216
 217         strcpy(WC->wc_username, "");
 218         strcpy(WC->wc_password, "");
 219         strcpy(WC->wc_roomname, "");
 220
 221         /* Calling output_headers() this way causes the cookies to be un-set */
 222         output_headers(1, 1, 0, 1, 0, 0, 0);
 223
 224         wprintf("<center>");
 225         serv_puts("MESG goodbye");
 226         serv_gets(buf);
 227
 228         if (WC->serv_sock >= 0) {
 229                 if (buf[0] == '1') {
 230                         fmout(NULL, "CENTER");
 231                 } else {
 232                         wprintf("Goodbye\n");
 233                 }
 234         }
 235         else {
 236                 wprintf("This program was unable to connect or stay "
 237                         "connected to the Citadel server.  Please report "
 238                         "this problem to your system administrator."
 239                 );
 240         }
 241
 242         wprintf("<hr /><a href=\"/\">Log in again</A>&nbsp;&nbsp;&nbsp;"
 243                 "<a href=\"javascript:window.close();\">Close window</A>"
 244                 "</center>\n");
 245         wDumpContent(2);
 246         end_webcit_session();
 247 }
 248
 249
 250 /*
 251  * validate new users
 252  */
 253 void validate(void)
 254 {
 255         char cmd[SIZ];
 256         char user[SIZ];
 257         char buf[SIZ];
 258         int a;
 259
 260         output_headers(1, 1, 2, 0, 0, 0, 0);
 261         wprintf("<div id=\"banner\">\n"
 262                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 263                 "<SPAN CLASS=\"titlebar\">Validate new users</SPAN>"
 264                 "</TD></TR></TABLE>\n"
 265                 "</div>\n<div id=\"content\">\n"
 266         );
 267
 268         strcpy(buf, bstr("user"));
 269         if (strlen(buf) > 0)
 270                 if (strlen(bstr("axlevel")) > 0) {
 271                         serv_printf("VALI %s|%s", buf, bstr("axlevel"));
 272                         serv_gets(buf);
 273                         if (buf[0] != '2') {
 274                                 wprintf("<b>%s</b><br />\n", &buf[4]);
 275                         }
 276                 }
 277         serv_puts("GNUR");
 278         serv_gets(buf);
 279
 280         if (buf[0] != '3') {
 281                 wprintf("<b>%s</b><br />\n", &buf[4]);
 282                 wDumpContent(1);
 283                 return;
 284         }
 285
 286         wprintf("<div id=\"fix_scrollbar_bug\">"
 287                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>\n");
 288         wprintf("<center>");
 289
 290         strcpy(user, &buf[4]);
 291         serv_printf("GREG %s", user);
 292         serv_gets(cmd);
 293         if (cmd[0] == '1') {
 294                 a = 0;
 295                 do {
 296                         serv_gets(buf);
 297                         ++a;
 298                         if (a == 1)
 299                                 wprintf("User #%s<br /><H1>%s</H1>",
 300                                         buf, &cmd[4]);
 301                         if (a == 2)
 302                                 wprintf("PW: %s<br />\n", buf);
 303                         if (a == 3)
 304                                 wprintf("%s<br />\n", buf);
 305                         if (a == 4)
 306                                 wprintf("%s<br />\n", buf);
 307                         if (a == 5)
 308                                 wprintf("%s, ", buf);
 309                         if (a == 6)
 310                                 wprintf("%s ", buf);
 311                         if (a == 7)
 312                                 wprintf("%s<br />\n", buf);
 313                         if (a == 8)
 314                                 wprintf("%s<br />\n", buf);
 315                         if (a == 9)
 316                                 wprintf("Current access level: %d (%s)\n",
 317                                         atoi(buf), axdefs[atoi(buf)]);
 318                 } while (strcmp(buf, "000"));
 319         } else {
 320                 wprintf("<H1>%s</H1>%s<br />\n", user, &cmd[4]);
 321         }
 322
 323         wprintf("<hr />Select access level for this user:<br />\n");
 324         for (a = 0; a <= 6; ++a) {
 325                 wprintf("<A HREF=\"/validate&user=");
 326                 urlescputs(user);
 327                 wprintf("&axlevel=%d\">%s</A>&nbsp;&nbsp;&nbsp;\n",
 328                         a, axdefs[a]);
 329         }
 330         wprintf("<br />\n");
 331
 332         wprintf("</CENTER>\n");
 333         wprintf("</td></tr></table></div>\n");
 334         wDumpContent(1);
 335 }
 336
 337
 338
 339 /*
 340  * Display form for registration.
 341  * (Set during_login to 1 if this registration is being performed during
 342  * new user login and will require chaining to the proper screen.)
 343  */
 344 void display_reg(int during_login)
 345 {
 346         long vcard_msgnum;
 347
 348         if (goto_config_room() != 0) {
 349                 if (during_login) do_welcome();
 350                 else display_main_menu();
 351                 return;
 352         }
 353
 354         vcard_msgnum = locate_user_vcard(WC->wc_username, -1);
 355         if (vcard_msgnum < 0L) {
 356                 if (during_login) do_welcome();
 357                 else display_main_menu();
 358                 return;
 359         }
 360
 361         if (during_login) {
 362                 do_edit_vcard(vcard_msgnum, "1", "/do_welcome");
 363         }
 364         else {
 365                 do_edit_vcard(vcard_msgnum, "1", "/display_main_menu");
 366         }
 367
 368 }
 369
 370
 371
 372
 373 /*
 374  * display form for changing your password
 375  */
 376 void display_changepw(void)
 377 {
 378         char buf[SIZ];
 379
 380         output_headers(1, 1, 2, 0, 0, 0, 0);
 381         wprintf("<div id=\"banner\">\n"
 382                 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
 383                 "<SPAN CLASS=\"titlebar\">Change your password</SPAN>"
 384                 "</TD></TR></TABLE>\n"
 385                 "</div>\n<div id=\"content\">\n"
 386         );
 387
 388         if (strlen(WC->ImportantMessage) > 0) {
 389                 do_template("beginbox_nt");
 390                 wprintf("<SPAN CLASS=\"errormsg\">"
 391                         "%s</SPAN><br />\n", WC->ImportantMessage);
 392                 do_template("endbox");
 393                 strcpy(WC->ImportantMessage, "");
 394         }
 395
 396         wprintf("<div id=\"fix_scrollbar_bug\">"
 397                 "<table border=0 width=100%% bgcolor=\"#ffffff\"><tr><td>\n");
 398
 399         wprintf("<CENTER><br />");
 400         serv_puts("MESG changepw");
 401         serv_gets(buf);
 402         if (buf[0] == '1') {
 403                 fmout(NULL, "CENTER");
 404         }
 405
 406         wprintf("<form name=\"changepwform\" action=\"changepw\" method=\"post\">\n");
 407         wprintf("<CENTER>"
 408                 "<table border=\"0\" cellspacing=\"5\" cellpadding=\"5\" "
 409                 "BGCOLOR=\"#EEEEEE\">"
 410                 "<TR><TD>Enter new password:</TD>\n");
 411         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass1\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 412         wprintf("<TR><TD>Enter it again to confirm:</TD>\n");
 413         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass2\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 414
 415         wprintf("</TABLE><br />\n");
 416         wprintf("<INPUT type=\"submit\" name=\"action\" value=\"Change\">"
 417                 "&nbsp;"
 418                 "<INPUT type=\"submit\" name=\"action\" value=\"Cancel\">\n");
 419         wprintf("</form></center>\n");
 420         wprintf("</td></tr></table></div>\n");
 421         wDumpContent(1);
 422 }
 423
 424 /*
 425  * change password
 426  */
 427 void changepw(void)
 428 {
 429         char buf[SIZ];
 430         char newpass1[32], newpass2[32];
 431
 432         if (strcmp(bstr("action"), "Change")) {
 433                 strcpy(WC->ImportantMessage,
 434                         "Cancelled.  Password was not changed.");
 435                 display_main_menu();
 436                 return;
 437         }
 438
 439         strcpy(newpass1, bstr("newpass1"));
 440         strcpy(newpass2, bstr("newpass2"));
 441
 442         if (strcasecmp(newpass1, newpass2)) {
 443                 strcpy(WC->ImportantMessage,
 444                         "They don't match.  Password was not changed.");
 445                 display_changepw();
 446                 return;
 447         }
 448
 449         if (strlen(newpass1) == 0) {
 450                 strcpy(WC->ImportantMessage,
 451                         "Blank passwords are not allowed.");
 452                 display_changepw();
 453                 return;
 454         }
 455
 456         serv_printf("SETP %s", newpass1);
 457         serv_gets(buf);
 458         sprintf(WC->ImportantMessage, "%s", &buf[4]);
 459         if (buf[0] == '2') {
 460                 safestrncpy(WC->wc_password, buf, sizeof WC->wc_password);
 461                 display_main_menu();
 462         }
 463         else {
 464                 display_changepw();
 465         }
 466 }