chanserv/chanserv_relay.c

   1 #include "chanserv.h"
   2 #include "../control/control.h"
   3 #include "../lib/version.h"
   4 #include "../lib/irc_string.h"
   5 #include "../core/config.h"
   6 #include "../lib/hmac.h"
   7 #include "../lib/strlfunc.h"
   8 #include "../lib/cbc.h"
   9 #include "authlib.h"
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13
  14 #define KEY_BITS 256
  15 #define BLOCK_SIZE 16
  16
  17 MODULE_VERSION(QVERSION);
  18
  19 int csa_docheckhashpass(void *source, int cargc, char **cargv);
  20 int csa_docreateaccount(void *source, int cargc, char **cargv);
  21 int csa_dosettempemail(void *source, int cargc, char **cargv);
  22 int csa_doresendemail(void *source, int cargc, char **cargv);
  23 int csa_doactivateuser(void *source, int cargc, char **cargv);
  24 static int decrypt_password(unsigned char *secret, int keybits, char *buf, int bufsize, char *encrypted);
  25 static int hex_to_int(char *input, unsigned char *buf, int buflen);
  26
  27 static unsigned char createaccountsecret[KEY_BITS / 8];
  28 static int createaccountsecret_ok = 0;
  29
  30 static unsigned char hexlookup[256] = {
  31                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  32                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  33                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  34                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  35                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
  36                        0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0xff, 0xff,
  37                        0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
  38                        0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  39                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  40                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0a, 0x0b, 0x0c,
  41                        0x0d, 0x0e, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  42                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  43                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  44                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  45                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  46                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  47                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  48                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  49                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  50                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  51                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  52                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  53                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  54                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  55                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  56                        0xff, 0xff, 0xff, 0xff, 0xff, 0xff
  57                                   };
  58
  59 void _init(void) {
  60   sstring *s;
  61
  62   registercontrolhelpcmd("checkhashpass", NO_RELAY, 3, csa_docheckhashpass, "Usage: checkhashpass <username> <digest> ?junk?");
  63   registercontrolhelpcmd("settempemail", NO_RELAY, 2, csa_dosettempemail, "Usage: settempemail <userid> <email address>");
  64   registercontrolhelpcmd("resendemail", NO_RELAY, 1, csa_doresendemail, "Usage: resendemail <userid>");
  65   registercontrolhelpcmd("activateuser", NO_RELAY, 1, csa_doactivateuser, "Usage: activateuser <userid>");
  66
  67   s=getcopyconfigitem("chanserv","createaccountsecret","",128);
  68   if(!s || !s->content || !s->content[0]) {
  69     Error("chanserv_relay",ERR_WARNING,"createaccountsecret not set, createaccount disabled.");
  70   } else if(s->length != KEY_BITS / 8 * 2 || !hex_to_int(s->content, createaccountsecret, sizeof(createaccountsecret))) {
  71     Error("chanserv_relay",ERR_WARNING,"createaccountsecret must be a %d character hex string.", KEY_BITS / 8 * 2);
  72   } else {
  73     registercontrolhelpcmd("createaccount", NO_RELAY, 4, csa_docreateaccount, "Usage: createaccount <execute> <username> <email address> <encrypted password>");
  74     createaccountsecret_ok = 1;
  75   }
  76
  77   freesstring(s);
  78 }
  79
  80 void _fini(void) {
  81   deregistercontrolcmd("checkhashpass", csa_docheckhashpass);
  82   deregistercontrolcmd("settempemail", csa_dosettempemail);
  83   deregistercontrolcmd("resendemail", csa_doresendemail);
  84   deregistercontrolcmd("activateuser", csa_doactivateuser);
  85
  86   if(createaccountsecret_ok)
  87     deregistercontrolcmd("createaccount", csa_docreateaccount);
  88 }
  89
  90 int csa_docheckhashpass(void *source, int cargc, char **cargv) {
  91   nick *sender=(nick *)source;
  92   reguser *rup;
  93   char *flags;
  94
  95   if(cargc<3) {
  96     controlreply(sender, "CHECKHASHPASS FAIL args");
  97     return CMD_ERROR;
  98   }
  99
 100   if (!(rup=findreguserbynick(cargv[0]))) {
 101     controlreply(sender, "CHECKHASHPASS FAIL user");
 102     return CMD_OK;
 103   }
 104
 105   flags = printflags(QUFLAG_ALL & rup->flags, ruflags);
 106   if(UHasSuspension(rup)) {
 107     controlreply(sender, "CHECKHASHPASS FAIL suspended %s %s %u", rup->username, flags, rup->ID);
 108   } else if(UIsInactive(rup)) {
 109     controlreply(sender, "CHECKHASHPASS FAIL inactive %s %s %u", rup->username, flags, rup->ID);
 110   } else if(!checkhashpass(rup, cargc<3?NULL:cargv[2], cargv[1])) {
 111     controlreply(sender, "CHECKHASHPASS FAIL digest %s %s %u", rup->username, flags, rup->ID);
 112   } else {
 113     controlreply(sender, "CHECKHASHPASS OK %s %s %u %s", rup->username, flags, rup->ID, rup->email?rup->email->content:"-");
 114   }
 115
 116   return CMD_OK;
 117 }
 118
 119 static char *email_to_error(char *email) {
 120   maildomain *mdp, *smdp;
 121   char *local;
 122   char *dupemail;
 123   int found = 0;
 124   maillock *mlp;
 125   reguser *ruh;
 126
 127   switch(csa_checkeboy_r(email)) {
 128     case -1:               break;
 129     case QM_EMAILTOOSHORT: return "emailshort";
 130     case QM_EMAILNOAT:     return "emailinvalid";
 131     case QM_EMAILATEND:    return "emailinvalid";
 132     case QM_EMAILINVCHR:   return "emailinvalid";
 133     case QM_NOTYOUREMAIL:  return "emailnotyours";
 134     case QM_INVALIDEMAIL:  return "emailinvalid";
 135     default:               return "emailunknown";
 136   }
 137
 138   /* maildomain BS... c&p from hello.c */
 139   for(mlp=maillocks;mlp;mlp=mlp->next) {
 140     if(!match(mlp->pattern->content, email)) {
 141       return "emaillocked";
 142     }
 143   }
 144
 145   dupemail = strdup(email);
 146   local=strchr(dupemail, '@');
 147   if(!local) {
 148     free(dupemail);
 149     return "emailunknown";
 150   }
 151   *(local++)='\0';
 152
 153   mdp=findnearestmaildomain(local);
 154   if(mdp) {
 155     for(smdp=mdp; smdp; smdp=smdp->parent) {
 156       if(MDIsBanned(smdp)) {
 157         free(dupemail);
 158         return "emaillocked";
 159       }
 160       if((smdp->count >= smdp->limit) && (smdp->limit > 0)) {
 161         free(dupemail);
 162         return "emaildomainlimit";
 163       }
 164     }
 165   }
 166
 167   mdp=findmaildomainbydomain(local);
 168   if(mdp) {
 169     for (ruh=mdp->users; ruh; ruh=ruh->nextbydomain) {
 170       if (ruh->localpart)
 171         if (!strcasecmp(dupemail, ruh->localpart->content)) {
 172           found++;
 173         }
 174     }
 175
 176     if((found >= mdp->actlimit) && (mdp->actlimit > 0)) {
 177       free(dupemail);
 178       return "emailaddresslimit";
 179     }
 180   }
 181
 182   free(dupemail);
 183
 184   return NULL;
 185 }
 186
 187 static void sendemail(reguser *rup) {
 188   csdb_createmail(rup, QMAIL_ACTIVATEEMAIL);
 189 }
 190
 191 int csa_docreateaccount(void *source, int cargc, char **cargv) {
 192   nick *sender=(nick *)source;
 193   int execute;
 194   char *error_username = NULL, *error_password = NULL, *error_email = NULL;
 195   char *username = NULL, *password = NULL, *email = NULL;
 196   char account_info[512];
 197   char passbuf[512];
 198   int do_create;
 199
 200   if(cargc<4) {
 201     controlreply(sender, "CREATEACCOUNT FALSE args");
 202     return CMD_ERROR;
 203   }
 204
 205   execute = cargv[0][0] == '1';
 206   if(strcmp(cargv[1], "0"))
 207     username = cargv[1];
 208   if(strcmp(cargv[2], "0"))
 209     email = cargv[2];
 210   if(strcmp(cargv[3], "0")) {
 211     int errorcode = decrypt_password(createaccountsecret, KEY_BITS, passbuf, sizeof(passbuf), cargv[3]);
 212     if(errorcode) {
 213       Error("chanserv_relay",ERR_WARNING,"createaccount unable to decrypt password, error code: %d", errorcode);
 214       controlreply(sender, "CREATEACCOUNT FALSE args");
 215       return CMD_ERROR;
 216     }
 217     password = passbuf;
 218   }
 219
 220   if(username) {
 221     if (findreguserbynick(username)) {
 222       error_username = "usernameinuse";
 223     } else if(csa_checkaccountname_r(username)) {
 224       error_username = "usernameinvalid";
 225     }
 226   }
 227
 228   if(email)
 229     error_email = email_to_error(email);
 230
 231   if(password) {
 232     int r = csa_checkpasswordquality(password);
 233     if(r == QM_PWTOSHORT) {
 234       error_password = "passwordshort";
 235     } else if(r == QM_PWTOWEAK) {
 236       error_password = "passwordweak";
 237     } else if(r != -1) {
 238       error_password = "passwordunknown";
 239     }
 240   }
 241
 242   if(execute && email && password && username && !error_email && !error_password && !error_username) {
 243     reguser *rup;
 244     do_create = 1;
 245
 246     rup = csa_createaccount(username, password, email);
 247     USetInactive(rup);
 248
 249     cs_log(sender,"CREATEACCOUNT created auth %s (%s)",rup->username,rup->email->content);
 250     csdb_createuser(rup);
 251     snprintf(account_info, sizeof(account_info), " %u", rup->ID);
 252
 253     sendemail(rup);
 254   } else {
 255     account_info[0] = '\0';
 256     do_create = 0;
 257   }
 258
 259   controlreply(sender, "CREATEACCOUNT %s%s%s%s%s%s%s%s",
 260     do_create ? "TRUE" : "FALSE",
 261     account_info,
 262     email && error_email ? " " : "", email && error_email ? error_email : "",
 263     password && error_password ? " " : "", password && error_password ? error_password : "",
 264     username && error_username ? " " : "", username && error_username ? error_username : ""
 265   );
 266
 267   return CMD_OK;
 268 }
 269
 270 int csa_dosettempemail(void *source, int cargc, char **cargv) {
 271   char *email;
 272   char *error;
 273   reguser *rup;
 274   nick *sender=(nick *)source;
 275
 276   if(cargc<2) {
 277     controlreply(sender, "SETTEMPEMAIL FALSE args");
 278     return CMD_ERROR;
 279   }
 280
 281   rup = findreguserbyID(atoi(cargv[0]));
 282   if(rup == NULL) {
 283     controlreply(sender, "SETTEMPEMAIL FALSE useridnotexist");
 284     return CMD_ERROR;
 285   }
 286
 287   if(!UIsInactive(rup)) {
 288     controlreply(sender, "SETTEMPEMAIL FALSE accountactive");
 289     return CMD_ERROR;
 290   }
 291
 292   email = cargv[1];
 293   error = email_to_error(email);
 294   if(error) {
 295     controlreply(sender, "SETTEMPEMAIL FALSE %s", error);
 296     return CMD_ERROR;
 297   }
 298
 299   freesstring(rup->email);
 300   rup->email=getsstring(email,EMAILLEN);
 301   cs_log(sender,"SETTEMPEMAIL OK username %s email %s",rup->username, rup->email->content);
 302
 303   csdb_updateuser(rup);
 304   sendemail(rup);
 305
 306   controlreply(sender, "SETTEMPEMAIL TRUE");
 307
 308   return CMD_OK;
 309 }
 310
 311 int csa_doresendemail(void *source, int cargc, char **cargv) {
 312   reguser *rup;
 313   nick *sender=(nick *)source;
 314
 315   if(cargc<1) {
 316     controlreply(sender, "RESENDEMAIL FALSE args");
 317     return CMD_ERROR;
 318   }
 319
 320   rup = findreguserbyID(atoi(cargv[0]));
 321   if(rup == NULL) {
 322     controlreply(sender, "RESENDEMAIL FALSE useridnotexist");
 323     return CMD_ERROR;
 324   }
 325
 326   if(!UIsInactive(rup)) {
 327     controlreply(sender, "RESENDEMAIL FALSE accountactive");
 328     return CMD_ERROR;
 329   }
 330
 331   sendemail(rup);
 332   controlreply(sender, "RESENDEMAIL TRUE");
 333   cs_log(sender,"RESENDEMAIL OK username %s",rup->username);
 334
 335   return CMD_OK;
 336 }
 337
 338 int csa_doactivateuser(void *source, int cargc, char **cargv) {
 339   reguser *rup;
 340   nick *sender=(nick *)source;
 341
 342   if(cargc<1) {
 343     controlreply(sender, "ACTIVATEUSER FALSE args");
 344     return CMD_ERROR;
 345   }
 346
 347   rup = findreguserbyID(atoi(cargv[0]));
 348   if(rup == NULL) {
 349     controlreply(sender, "ACTIVATEUSER FALSE useridnotexist");
 350     return CMD_ERROR;
 351   }
 352
 353   if(!UIsInactive(rup)) {
 354     controlreply(sender, "ACTIVATEUSER FALSE accountactive");
 355     return CMD_ERROR;
 356   }
 357
 358   UClearInactive(rup);
 359   csdb_updateuser(rup);
 360
 361   cs_log(sender,"ACTIVATEUSER OK username %s",rup->username);
 362   controlreply(sender, "ACTIVATEUSER TRUE");
 363
 364   return CMD_OK;
 365 }
 366
 367 static int hex_to_int(char *input, unsigned char *buf, int buflen) {
 368   int i;
 369   for(i=0;i<buflen;i++) {
 370     if((0xff == hexlookup[(int)input[i * 2]]) || (0xff == hexlookup[(int)input[i * 2 + 1]])) {
 371       return 0;
 372     } else {
 373       buf[i] = (hexlookup[(int)input[i * 2]] << 4) | hexlookup[(int)input[i * 2 + 1]];
 374     }
 375   }
 376   return 1;
 377 }
 378
 379 static int decrypt_password(unsigned char *secret, int keybits, char *buf, int bufsize, char *encrypted) {
 380   size_t ciphertextlen, datalen;
 381   unsigned char iv[BLOCK_SIZE];
 382   rijndaelcbc *c;
 383   int i, j;
 384
 385   datalen = strlen(encrypted);
 386   if(datalen % 2 != 0)
 387     return 1;
 388   if(datalen < BLOCK_SIZE * 2 * 2)
 389     return 2;
 390
 391   if(!hex_to_int(encrypted, iv, BLOCK_SIZE))
 392     return 3;
 393
 394   ciphertextlen = (datalen - (BLOCK_SIZE * 2)) / 2;
 395   if(ciphertextlen > bufsize || ciphertextlen % BLOCK_SIZE != 0)
 396     return 4;
 397
 398   if(!hex_to_int(encrypted + BLOCK_SIZE * 2, (unsigned char *)buf, ciphertextlen))
 399     return 5;
 400
 401   c = rijndaelcbc_init(secret, keybits, iv, 1);
 402
 403   for(i=0;i<ciphertextlen;i+=BLOCK_SIZE) {
 404     char *p = &buf[i];
 405     unsigned char *r = rijndaelcbc_decrypt(c, (unsigned char *)p);
 406     memcpy(p, r, BLOCK_SIZE);
 407
 408     for(j=0;j<BLOCK_SIZE;j++) {
 409       if(*(p + j) == '\0') {
 410         rijndaelcbc_free(c);
 411         return 0;
 412       }
 413     }
 414   }
 415
 416   rijndaelcbc_free(c);
 417   return 6;
 418 }