ticketauth/ticketauth.c

   1 /* ticketauth.c */
   2
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <strings.h>
   6
   7 #include "../control/control.h"
   8 #include "../core/config.h"
   9 #include "../nick/nick.h"
  10 #include "../core/error.h"
  11 #include "../lib/hmac.h"
  12 #include "../lib/version.h"
  13 #include "../localuser/localuser.h"
  14 #include "../core/hooks.h"
  15 #include "../irc/irc.h"
  16 #include "../chanserv/chanserv.h"
  17
  18 #define WARN_CHANNEL "#twilightzone"
  19
  20 MODULE_VERSION("");
  21
  22 sstring *sharedsecret = NULL;
  23
  24 int ta_ticketauth(void *source, int cargc, char **cargv) {
  25   nick *np = (nick *)source;
  26   char buffer[1024], *uhmac, *acc, *junk, *flags;
  27   unsigned char digest[32];
  28   int expiry, acclen, id;
  29   hmacsha256 hmac;
  30   channel *wcp;
  31
  32   if(IsAccount(np)) {
  33     controlreply(np, "You're already authed.");
  34     return CMD_ERROR;
  35   }
  36
  37   if(cargc != 6)
  38     return CMD_USAGE;
  39
  40   acc = cargv[0];
  41   expiry = atoi(cargv[1]);
  42   id = atoi(cargv[2]);
  43   acclen = strlen(acc);
  44   flags = cargv[3];
  45   junk = cargv[4];
  46   uhmac = cargv[5];
  47
  48   if((acclen <= 1) || (acclen > ACCOUNTLEN)) {
  49     controlreply(np, "Bad account.");
  50     return CMD_ERROR;
  51   }
  52
  53   if(time(NULL) > expiry + 30) {
  54     controlwall(NO_OPER, NL_MISC, "%s!%s@%s attempted to TICKETAUTH as %s (expired)", np->nick, np->ident, np->host->name->content, acc);
  55     controlreply(np, "Ticket time is bad or has expired.");
  56     return CMD_ERROR;
  57   }
  58
  59   hmacsha256_init(&hmac, (unsigned char *)sharedsecret->content, sharedsecret->length);
  60   snprintf(buffer, sizeof(buffer), "%s %d %d %s", acc, expiry, id, junk);
  61   hmacsha256_update(&hmac, (unsigned char *)buffer, strlen(buffer));
  62   hmacsha256_final(&hmac, digest);
  63
  64   /* hahahaha */
  65   snprintf(buffer, sizeof(buffer), "%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x", digest[0], digest[1],  digest[2], digest[3], digest[4], digest[5], digest[6], digest[7], digest[8], digest[9], digest[10], digest[11], digest[12], digest[13], digest[14], digest[15], digest[16], digest[17], digest[18], digest[19], digest[20], digest[21], digest[22], digest[23], digest[24], digest[25], digest[26], digest[27], digest[28], digest[29], digest[30], digest[31]);
  66
  67   if(strcasecmp(buffer, uhmac)) {
  68     controlwall(NO_OPER, NL_MISC, "%s!%s@%s attempted to TICKETAUTH as %s (bad HMAC)", np->nick, np->ident, np->host->name->content, acc);
  69     controlreply(np, "Bad HMAC.");
  70     return CMD_ERROR;
  71   }
  72
  73   controlwall(NO_OPER, NL_MISC, "%s!%s@%s TICKETAUTH'ed as %s", np->nick, np->ident, np->host->name->content, acc);
  74
  75   wcp = findchannel(WARN_CHANNEL);
  76   if(wcp)
  77     controlchanmsg(wcp, "WARNING: %s!%s@%s TICKETAUTH'ed as %s", np->nick, np->ident, np->host->name->content, acc);
  78
  79   controlreply(np, "Ticket valid, authing. . .");
  80
  81   localusersetaccount(np, acc, id, 0, cs_accountflagmap_str(flags));
  82
  83   controlreply(np, "Done.");
  84   return CMD_OK;
  85 }
  86
  87 void _init() {
  88   sharedsecret = getcopyconfigitem("ticketauth", "sharedsecret", "", 512);
  89   if(!sharedsecret || !sharedsecret->content || !sharedsecret->content[0]) {
  90     Error("ticketauth", ERR_ERROR, "Shared secret not defined in config file.");
  91     if(sharedsecret) {
  92       freesstring(sharedsecret);
  93       sharedsecret = NULL;
  94     }
  95
  96     return;
  97   }
  98
  99   registercontrolhelpcmd("ticketauth", NO_OPERED, 5, ta_ticketauth, "Usage: ticketauth <ticket>");
 100 }
 101
 102 void _fini() {
 103   if(!sharedsecret)
 104     return;
 105
 106   deregistercontrolcmd("ticketauth", ta_ticketauth);
 107
 108   freesstring(sharedsecret);
 109 }