source3/librpc/ndr/sid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    libndr interface
   5
   6    Copyright (C) Andrew Tridgell 2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23
  24 /*
  25   convert a dom_sid to a string
  26 */
  27 char *dom_sid_string(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
  28 {
  29         int i, ofs, maxlen;
  30         uint32_t ia;
  31         char *ret;
  32
  33         if (!sid) {
  34                 return talloc_strdup(mem_ctx, "(NULL SID)");
  35         }
  36
  37         maxlen = sid->num_auths * 11 + 25;
  38         ret = (char *)talloc_size(mem_ctx, maxlen);
  39         if (!ret) return talloc_strdup(mem_ctx, "(SID ERR)");
  40
  41         /*
  42          * BIG NOTE: this function only does SIDS where the identauth is not
  43          * >= ^32 in a range of 2^48.
  44          */
  45
  46         ia = (sid->id_auth[5]) +
  47                 (sid->id_auth[4] << 8 ) +
  48                 (sid->id_auth[3] << 16) +
  49                 (sid->id_auth[2] << 24);
  50
  51         ofs = snprintf(ret, maxlen, "S-%u-%lu",
  52                        (unsigned int)sid->sid_rev_num, (unsigned long)ia);
  53
  54         for (i = 0; i < sid->num_auths; i++) {
  55                 ofs += snprintf(ret + ofs, maxlen - ofs, "-%lu", (unsigned long)sid->sub_auths[i]);
  56         }
  57
  58         return ret;
  59 }