mirror of
https://github.com/kunkundi/crossdesk.git
synced 2025-10-27 12:45:35 +08:00
35 lines
742 B
C
35 lines
742 B
C
/**
|
|
* Copyright (c) 2021 Paul-Louis Ageneau
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#include "const_time.h"
|
|
|
|
int const_time_memcmp(const void *a, const void *b, size_t len) {
|
|
const unsigned char *ca = a;
|
|
const unsigned char *cb = b;
|
|
unsigned char x = 0;
|
|
for (size_t i = 0; i < len; i++)
|
|
x |= ca[i] ^ cb[i];
|
|
|
|
return x;
|
|
}
|
|
|
|
int const_time_strcmp(const void *a, const void *b) {
|
|
const unsigned char *ca = a;
|
|
const unsigned char *cb = b;
|
|
unsigned char x = 0;
|
|
size_t i = 0;
|
|
for(;;) {
|
|
x |= ca[i] ^ cb[i];
|
|
if (!ca[i] || !cb[i])
|
|
break;
|
|
++i;
|
|
}
|
|
|
|
return x;
|
|
}
|