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s3:vfs: Use GnuTLS MD5 in vfs_streams_xattr

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Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This commit is contained in:
Andreas Schneider 2018-11-05 17:41:42 +01:00 committed by Andrew Bartlett
parent 2772c92efa
commit bb273a0053
1 changed files with 37 additions and 13 deletions
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50
source3/modules/vfs_streams_xattr.c
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@ -24,10 +24,12 @@
#include "includes.h"
#include "smbd/smbd.h"
#include "system/filesys.h"
#include "../lib/crypto/md5.h"
#include "lib/util/tevent_unix.h"
#include "librpc/gen_ndr/ioctl.h"
#include <gnutls/gnutls.h>
#include <gnutls/crypto.h>
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
@ -47,10 +49,11 @@ struct stream_io {
static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
{
MD5_CTX ctx;
unsigned char hash[16];
SMB_INO_T result;
unsigned char hash[16];
gnutls_hash_hd_t hash_hnd = NULL;
SMB_INO_T result = 0;
char *upper_sname;
int rc;
DEBUG(10, ("stream_inode called for %lu/%lu [%s]\n",
(unsigned long)sbuf->st_ex_dev,
@ -59,22 +62,43 @@ static SMB_INO_T stream_inode(const SMB_STRUCT_STAT *sbuf, const char *sname)
upper_sname = talloc_strdup_upper(talloc_tos(), sname);
SMB_ASSERT(upper_sname != NULL);
MD5Init(&ctx);
MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_dev),
sizeof(sbuf->st_ex_dev));
MD5Update(&ctx, (const unsigned char *)&(sbuf->st_ex_ino),
sizeof(sbuf->st_ex_ino));
MD5Update(&ctx, (unsigned char *)upper_sname,
talloc_get_size(upper_sname)-1);
MD5Final(hash, &ctx);
rc = gnutls_hash_init(&hash_hnd, GNUTLS_DIG_MD5);
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, hash);
TALLOC_FREE(upper_sname);
/* Hopefully all the variation is in the lower 4 (or 8) bytes! */
memcpy(&result, hash, sizeof(result));
ZERO_ARRAY(hash);
DEBUG(10, ("stream_inode returns %lu\n", (unsigned long)result));
out:
TALLOC_FREE(upper_sname);
return result;
}