webcit/cookie_conversion.c

   1 /*
   2  * $Id$
   3  */
   4
   5 #include "webcit.h"
   6
   7 /*
   8  * String to unset the cookie.
   9  * Any date "in the past" will work, so I chose my birthday, right down to
  10  * the exact minute.  :)
  11  */
  12 static char *unset = "; expires=28-May-1971 18:10:00 GMT";
  13 typedef unsigned char byte;           /* Byte type used by cookie_to_stuff() */
  14
  15 /*
  16  * Pack all session info into one easy-to-digest cookie. Healthy and delicious!
  17  */
  18 void stuff_to_cookie(int unset_cookies)
  19 {
  20         wcsession *WCC = WC;
  21         char buf[SIZ];
  22
  23         if (unset_cookies) {
  24                 hprintf("Set-cookie: webcit=%s; path=/\r\n", unset);
  25         }
  26         else
  27         {
  28                 StrBufAppendPrintf(WCC->HBuf, "Set-cookie: webcit=");
  29                 snprintf(buf, sizeof(buf), "%d", WCC->wc_session);
  30                 StrBufHexescAppend(WCC->HBuf, NULL, buf);
  31                 StrBufHexescAppend(WCC->HBuf, NULL, "|");
  32                 StrBufHexescAppend(WCC->HBuf, WCC->wc_username, NULL);
  33                 StrBufHexescAppend(WCC->HBuf, NULL, "|");
  34                 StrBufHexescAppend(WCC->HBuf, WCC->wc_password, NULL);
  35                 StrBufHexescAppend(WCC->HBuf, NULL, "|");
  36                 StrBufHexescAppend(WCC->HBuf, WCC->wc_roomname, NULL);
  37                 StrBufHexescAppend(WCC->HBuf, NULL, "|");
  38                 StrBufHexescAppend(WCC->HBuf, NULL, get_selected_language());
  39                 StrBufHexescAppend(WCC->HBuf, NULL, "|");
  40
  41                 if (server_cookie != NULL) {
  42                         StrBufAppendPrintf(WCC->HBuf,
  43                                            ";path=/ \r\n%s\r\n",
  44                                            server_cookie);
  45                 }
  46                 else {
  47                         StrBufAppendBufPlain(WCC->HBuf,
  48                                              HKEY("; path=/\r\n"), 0);
  49                 }
  50         }
  51 }
  52
  53 /*
  54  * Convert unpacked hex string to an integer
  55  */
  56 int xtoi(const char *in, size_t len)
  57 {
  58         int val = 0;
  59         char c = 0;
  60         while (!IsEmptyStr(in) && isxdigit((byte) *in) && (len-- > 0))
  61         {
  62                 c = *in++;
  63                 val <<= 4;
  64                 if (!isdigit((unsigned char)c)) {
  65                         c = tolower((unsigned char) c);
  66                         if ((c < 'a') || (c > 'f'))
  67                                 return 0;
  68                         val += c  - 'a' + 10 ;
  69                 }
  70                 else
  71                         val += c - '0';
  72         }
  73         return val;
  74 }
  75
  76 /*
  77  * Extract all that fun stuff out of the cookie.
  78  */
  79 void cookie_to_stuff(StrBuf *cookie,
  80                         int *session,
  81                         StrBuf *user,
  82                         StrBuf *pass,
  83                         StrBuf *room,
  84                         StrBuf *language)
  85 {
  86         if (session != NULL) {
  87                 *session = StrBufExtract_int(cookie, 0, '|');
  88         }
  89         if (user != NULL) {
  90                 StrBufExtract_token(user, cookie, 1, '|');
  91         }
  92         if (pass != NULL) {
  93                 StrBufExtract_token(pass, cookie, 2, '|');
  94         }
  95         if (room != NULL) {
  96                 StrBufExtract_token(room, cookie, 3, '|');
  97         }
  98         if (language != NULL) {
  99                 StrBufExtract_token(language, cookie, 4, '|');
 100         }
 101 }