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 id=\"content\">\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                 serv_printf("NEWU %s", bstr("name"));
 128                 serv_gets(buf);
 129                 if (buf[0] == '2') {
 130                         become_logged_in(bstr("name"), bstr("pass"), buf);
 131                         serv_printf("SETP %s", bstr("pass"));
 132                         serv_gets(buf);
 133                 } else {
 134                         display_login(&buf[4]);
 135                         return;
 136                 }
 137         }
 138         if (WC->logged_in) {
 139                 if (WC->need_regi) {
 140                         display_reg(1);
 141                 } else {
 142                         do_welcome();
 143                 }
 144         } else {
 145                 display_login("Your password was not accepted.");
 146         }
 147
 148 }
 149
 150 void do_welcome(void)
 151 {
 152         char startpage[SIZ];
 153
 154         get_preference("startpage", startpage);
 155         if (strlen(startpage)==0) {
 156                 strcpy(startpage, "/dotskip&room=_BASEROOM_");
 157                 set_preference("startpage", startpage);
 158         }
 159
 160         http_redirect(startpage);
 161 }
 162
 163
 164 /*
 165  * Disconnect from the Citadel server, and end this WebCit session
 166  */
 167 void end_webcit_session(void) {
 168         serv_puts("QUIT");
 169         WC->killthis = 1;
 170         /* close() of citadel socket will be done by do_housekeeping() */
 171 }
 172
 173
 174 void do_logout(void)
 175 {
 176         char buf[SIZ];
 177
 178         strcpy(WC->wc_username, "");
 179         strcpy(WC->wc_password, "");
 180         strcpy(WC->wc_roomname, "");
 181
 182         /* Calling output_headers() this way causes the cookies to be un-set */
 183         output_headers(1, 1, 0, 1, 0, 0, 0);
 184
 185         wprintf("<center>");
 186         serv_puts("MESG goodbye");
 187         serv_gets(buf);
 188
 189         if (WC->serv_sock >= 0) {
 190                 if (buf[0] == '1') {
 191                         fmout(NULL, "CENTER");
 192                 } else {
 193                         wprintf("Goodbye\n");
 194                 }
 195         }
 196         else {
 197                 wprintf("This program was unable to connect or stay "
 198                         "connected to the Citadel server.  Please report "
 199                         "this problem to your system administrator."
 200                 );
 201         }
 202
 203         wprintf("<hr /><a href=\"/\">Log in again</A>&nbsp;&nbsp;&nbsp;"
 204                 "<a href=\"javascript:window.close();\">Close window</A>"
 205                 "</center>\n");
 206         wDumpContent(2);
 207         end_webcit_session();
 208 }
 209
 210
 211 /*
 212  * validate new users
 213  */
 214 void validate(void)
 215 {
 216         char cmd[SIZ];
 217         char user[SIZ];
 218         char buf[SIZ];
 219         int a;
 220
 221         output_headers(1, 1, 0, 0, 0, 0, 0);
 222
 223         strcpy(buf, bstr("user"));
 224         if (strlen(buf) > 0)
 225                 if (strlen(bstr("axlevel")) > 0) {
 226                         serv_printf("VALI %s|%s", buf, bstr("axlevel"));
 227                         serv_gets(buf);
 228                         if (buf[0] != '2') {
 229                                 wprintf("<b>%s</b><br />\n", &buf[4]);
 230                         }
 231                 }
 232         serv_puts("GNUR");
 233         serv_gets(buf);
 234
 235         if (buf[0] != '3') {
 236                 wprintf("<b>%s</b><br />\n", &buf[4]);
 237                 wDumpContent(1);
 238                 return;
 239         }
 240
 241         wprintf("<center>");
 242         do_template("beginbox_nt");
 243         wprintf("<center>");
 244
 245         strcpy(user, &buf[4]);
 246         serv_printf("GREG %s", user);
 247         serv_gets(cmd);
 248         if (cmd[0] == '1') {
 249                 a = 0;
 250                 do {
 251                         serv_gets(buf);
 252                         ++a;
 253                         if (a == 1)
 254                                 wprintf("User #%s<br /><H1>%s</H1>",
 255                                         buf, &cmd[4]);
 256                         if (a == 2)
 257                                 wprintf("PW: %s<br />\n", buf);
 258                         if (a == 3)
 259                                 wprintf("%s<br />\n", buf);
 260                         if (a == 4)
 261                                 wprintf("%s<br />\n", buf);
 262                         if (a == 5)
 263                                 wprintf("%s, ", buf);
 264                         if (a == 6)
 265                                 wprintf("%s ", buf);
 266                         if (a == 7)
 267                                 wprintf("%s<br />\n", buf);
 268                         if (a == 8)
 269                                 wprintf("%s<br />\n", buf);
 270                         if (a == 9)
 271                                 wprintf("Current access level: %d (%s)\n",
 272                                         atoi(buf), axdefs[atoi(buf)]);
 273                 } while (strcmp(buf, "000"));
 274         } else {
 275                 wprintf("<H1>%s</H1>%s<br />\n", user, &cmd[4]);
 276         }
 277
 278         wprintf("<hr />Select access level for this user:<br />\n");
 279         for (a = 0; a <= 6; ++a) {
 280                 wprintf("<A HREF=\"/validate&user=");
 281                 urlescputs(user);
 282                 wprintf("&axlevel=%d\">%s</A>&nbsp;&nbsp;&nbsp;\n",
 283                         a, axdefs[a]);
 284         }
 285         wprintf("<br />\n");
 286
 287         wprintf("</CENTER>\n");
 288         do_template("endbox");
 289         wprintf("</CENTER>\n");
 290         wDumpContent(1);
 291 }
 292
 293
 294
 295 /*
 296  * Display form for registration.
 297  * (Set during_login to 1 if this registration is being performed during
 298  * new user login and will require chaining to the proper screen.)
 299  */
 300 void display_reg(int during_login)
 301 {
 302         long vcard_msgnum;
 303
 304         if (goto_config_room() != 0) {
 305                 if (during_login) do_welcome();
 306                 else display_main_menu();
 307                 return;
 308         }
 309
 310         vcard_msgnum = locate_user_vcard(WC->wc_username, -1);
 311         if (vcard_msgnum < 0L) {
 312                 if (during_login) do_welcome();
 313                 else display_main_menu();
 314                 return;
 315         }
 316
 317         if (during_login) {
 318                 do_edit_vcard(vcard_msgnum, "1", "/do_welcome");
 319         }
 320         else {
 321                 do_edit_vcard(vcard_msgnum, "1", "/display_main_menu");
 322         }
 323
 324 }
 325
 326
 327
 328
 329 /*
 330  * display form for changing your password
 331  */
 332 void display_changepw(void)
 333 {
 334         char buf[SIZ];
 335
 336         output_headers(1, 1, 0, 0, 0, 0, 0);
 337
 338         svprintf("BOXTITLE", WCS_STRING, "Change your password");
 339         do_template("beginbox");
 340         wprintf("<CENTER><br />");
 341         serv_puts("MESG changepw");
 342         serv_gets(buf);
 343         if (buf[0] == '1') {
 344                 fmout(NULL, "CENTER");
 345         }
 346
 347         wprintf("<FORM ACTION=\"changepw\" METHOD=\"POST\">\n");
 348         wprintf("<CENTER>"
 349                 "<table border=\"0\" cellspacing=\"5\" cellpadding=\"5\" "
 350                 "BGCOLOR=\"#EEEEEE\">"
 351                 "<TR><TD>Enter new password:</TD>\n");
 352         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass1\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 353         wprintf("<TR><TD>Enter it again to confirm:</TD>\n");
 354         wprintf("<TD><INPUT TYPE=\"password\" NAME=\"newpass2\" VALUE=\"\" MAXLENGTH=\"20\"></TD></TR>\n");
 355         wprintf("</TABLE><br />\n");
 356         wprintf("<INPUT type=\"submit\" NAME=\"action\" VALUE=\"Change\">\n"
 357                 "&nbsp;"
 358                 "<INPUT type=\"submit\" NAME=\"action\" VALUE=\"Cancel\">\n");
 359         wprintf("</CENTER>\n");
 360         do_template("endbox");
 361         wDumpContent(1);
 362 }
 363
 364 /*
 365  * change password
 366  */
 367 void changepw(void)
 368 {
 369         char buf[SIZ];
 370         char newpass1[32], newpass2[32];
 371
 372         if (strcmp(bstr("action"), "Change")) {
 373                 strcpy(WC->ImportantMessage,
 374                         "Cancelled.  Password was not changed.");
 375                 display_main_menu();
 376                 return;
 377         }
 378         strcpy(newpass1, bstr("newpass1"));
 379         strcpy(newpass2, bstr("newpass2"));
 380
 381         if (strcasecmp(newpass1, newpass2)) {
 382                 strcpy(WC->ImportantMessage,
 383                         "They don't match.  Password was not changed.");
 384                 display_main_menu();
 385                 return;
 386         }
 387         serv_printf("SETP %s", newpass1);
 388         serv_gets(buf);
 389         strcpy(WC->ImportantMessage, &buf[4]);
 390         display_main_menu();
 391 }