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s3:modules: Add hash_inode() function based on SHA1

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This should use SHA1 as modern CPUs have SHA NI instruction support.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Andreas Schneider 2019-06-18 16:56:43 +02:00 committed by Andreas Schneider
parent fa2d5b3daa
commit cf0442bff1
3 changed files with 112 additions and 0 deletions
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83
source3/modules/hash_inode.c Normal file
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@ -0,0 +1,83 @@
/*
* Unix SMB/Netbios implementation.
*
* Copyright (c) 2019 Andreas Schneider <asn@samba.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "hash_inode.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
SMB_INO_T hash_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
{
gnutls_hash_hd_t hash_hnd = NULL;
uint8_t digest[gnutls_hash_get_len(GNUTLS_DIG_SHA1)];
char *upper_sname = NULL;
SMB_INO_T result = 0;
int rc;
DBG_DEBUG("hash_inode called for %ju/%ju [%s]\n",
(uintmax_t)sbuf->st_ex_dev,
(uintmax_t)sbuf->st_ex_ino,
sname);
upper_sname = talloc_strdup_upper(talloc_tos(), sname);
SMB_ASSERT(upper_sname != NULL);
rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_SHA1);
if (rc < 0) {
goto out;
}
rc = gnutls_hash(hash_hnd,
&(sbuf->st_ex_dev),
sizeof(sbuf->st_ex_dev));
if (rc < 0) {
gnutls_hash_deinit(hash_hnd, NULL);
goto out;
}
rc = gnutls_hash(hash_hnd,
&(sbuf->st_ex_ino),
sizeof(sbuf->st_ex_ino));
if (rc < 0) {
gnutls_hash_deinit(hash_hnd, NULL);
goto out;
}
rc = gnutls_hash(hash_hnd,
upper_sname,
talloc_get_size(upper_sname) - 1);
if (rc < 0) {
gnutls_hash_deinit(hash_hnd, NULL);
goto out;
}
gnutls_hash_deinit(hash_hnd, digest);
memcpy(&result, digest, sizeof(result));
DBG_DEBUG("fruit_inode \"%s\": ino=%ju\n",
sname, (uintmax_t)result);
out:
TALLOC_FREE(upper_sname);
DBG_DEBUG("hash_inode '%s': ino=%ju\n",
sname,
(uintmax_t)result);
return result;
}

25
source3/modules/hash_inode.h Normal file
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@ -0,0 +1,25 @@
/*
* Unix SMB/Netbios implementation.
*
* Copyright (c) 2019 Andreas Schneider <asn@samba.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _HASH_INODE_H
#define _HASH_INODE_H
SMB_INO_T hash_inode(const SMB_STRUCT_STAT *sbuf, const char *sname);
#endif /* _HASH_INODE_H */

4
source3/modules/wscript_build
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@ -36,6 +36,10 @@ bld.SAMBA3_SUBSYSTEM('OFFLOAD_TOKEN',
bld.SAMBA3_SUBSYSTEM('STRING_REPLACE',
source='string_replace.c')
bld.SAMBA3_SUBSYSTEM('HASH_INODE',
source='hash_inode.c',
deps='gnutls')
#
# This is always be static, see
# source3/wscript: required_static_modules