source3/modules/hash_inode.c

   1 /*
   2  * Unix SMB/Netbios implementation.
   3  *
   4  * Copyright (c) 2019      Andreas Schneider <asn@samba.org>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "hash_inode.h"
  22
  23 #include <gnutls/gnutls.h>
  24 #include <gnutls/crypto.h>
  25
  26 SMB_INO_T hash_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
  27 {
  28         gnutls_hash_hd_t hash_hnd = NULL;
  29         uint8_t digest[gnutls_hash_get_len(GNUTLS_DIG_SHA1)];
  30         char *upper_sname = NULL;
  31         SMB_INO_T result = 0;
  32         int rc;
  33
  34         DBG_DEBUG("hash_inode called for %ju/%ju [%s]\n",
  35                   (uintmax_t)sbuf->st_ex_dev,
  36                   (uintmax_t)sbuf->st_ex_ino,
  37                   sname);
  38
  39         upper_sname = talloc_strdup_upper(talloc_tos(), sname);
  40         SMB_ASSERT(upper_sname != NULL);
  41
  42         rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_SHA1);
  43         if (rc < 0) {
  44                 goto out;
  45         }
  46
  47         rc = gnutls_hash(hash_hnd,
  48                          &(sbuf->st_ex_dev),
  49                          sizeof(sbuf->st_ex_dev));
  50         if (rc < 0) {
  51                 gnutls_hash_deinit(hash_hnd, NULL);
  52                 goto out;
  53         }
  54         rc = gnutls_hash(hash_hnd,
  55                          &(sbuf->st_ex_ino),
  56                          sizeof(sbuf->st_ex_ino));
  57         if (rc < 0) {
  58                 gnutls_hash_deinit(hash_hnd, NULL);
  59                 goto out;
  60         }
  61         rc = gnutls_hash(hash_hnd,
  62                          upper_sname,
  63                          talloc_get_size(upper_sname) - 1);
  64         if (rc < 0) {
  65                 gnutls_hash_deinit(hash_hnd, NULL);
  66                 goto out;
  67         }
  68
  69         gnutls_hash_deinit(hash_hnd, digest);
  70
  71         memcpy(&result, digest, sizeof(result));
  72         DBG_DEBUG("fruit_inode \"%s\": ino=%ju\n",
  73                   sname, (uintmax_t)result);
  74
  75 out:
  76         TALLOC_FREE(upper_sname);
  77
  78         DBG_DEBUG("hash_inode '%s': ino=%ju\n",
  79                   sname,
  80                   (uintmax_t)result);
  81
  82         return result;
  83 }