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/*
* 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 "replace.h"
#include <talloc.h>
#include "lib/util/fault.h"
#include "talloc_keep_secret.h"
static int talloc_keep_secret_destructor(void *ptr)
{
size_t size = talloc_get_size(ptr);
if (unlikely(size == 0)) {
return 0;
}
BURN_PTR_SIZE(ptr, size);
return 0;
}
void _talloc_keep_secret(void *ptr, const char *name)
{
size_t size;
if (unlikely(ptr == NULL)) {
#ifdef DEVELOPER
smb_panic("Invalid talloc pointer");
#endif
return;
}
size = talloc_get_size(ptr);
if (unlikely(size == 0)) {
return;
}
/*
* Overwrite talloc name only if it reveals memory content.
* That prevents breaking talloc_get_type_abort().
*/
if (talloc_get_name(ptr) == ptr) {
talloc_set_name_const(ptr, name);
}
talloc_set_destructor(ptr, talloc_keep_secret_destructor);
}
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