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 #include "lib/crypto/gnutls_helpers.h"
  26
  27 SMB_INO_T hash_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
  28 {
  29         gnutls_hash_hd_t hash_hnd = NULL;
  30         uint8_t digest[gnutls_hash_get_len(GNUTLS_DIG_SHA1)];
  31         char *upper_sname = NULL;
  32         SMB_INO_T result = 0;
  33         int rc;
  34
  35         DBG_DEBUG("hash_inode called for %ju/%ju [%s]\n",
  36                   (uintmax_t)sbuf->st_ex_dev,
  37                   (uintmax_t)sbuf->st_ex_ino,
  38                   sname);
  39
  40         upper_sname = talloc_strdup_upper(talloc_tos(), sname);
  41         SMB_ASSERT(upper_sname != NULL);
  42
  43         GNUTLS_FIPS140_SET_LAX_MODE();
  44
  45         rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_SHA1);
  46         if (rc < 0) {
  47                 goto out;
  48         }
  49
  50         rc = gnutls_hash(hash_hnd,
  51                          &(sbuf->st_ex_dev),
  52                          sizeof(sbuf->st_ex_dev));
  53         if (rc < 0) {
  54                 gnutls_hash_deinit(hash_hnd, NULL);
  55                 goto out;
  56         }
  57         rc = gnutls_hash(hash_hnd,
  58                          &(sbuf->st_ex_ino),
  59                          sizeof(sbuf->st_ex_ino));
  60         if (rc < 0) {
  61                 gnutls_hash_deinit(hash_hnd, NULL);
  62                 goto out;
  63         }
  64         rc = gnutls_hash(hash_hnd,
  65                          upper_sname,
  66                          talloc_get_size(upper_sname) - 1);
  67         if (rc < 0) {
  68                 gnutls_hash_deinit(hash_hnd, NULL);
  69                 goto out;
  70         }
  71
  72         gnutls_hash_deinit(hash_hnd, digest);
  73
  74         memcpy(&result, digest, sizeof(result));
  75         DBG_DEBUG("fruit_inode \"%s\": ino=%ju\n",
  76                   sname, (uintmax_t)result);
  77
  78 out:
  79         GNUTLS_FIPS140_SET_STRICT_MODE();
  80         TALLOC_FREE(upper_sname);
  81
  82         DBG_DEBUG("hash_inode '%s': ino=%ju\n",
  83                   sname,
  84                   (uintmax_t)result);
  85
  86         return result;
  87 }