-/* crypto/constant_time_test.c */
-/*-
- * Utilities for constant-time cryptography.
+/*
+ * Copyright 2014-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * Author: Emilia Kasper (emilia@openssl.org)
- * Based on previous work by Bodo Moeller, Emilia Kasper, Adam Langley
- * (Google).
- * ====================================================================
- * Copyright (c) 2014 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include "internal/constant_time_locl.h"
+#include "e_os.h"
-#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
+#include "internal/numbers.h"
+
static const unsigned int CONSTTIME_TRUE = (unsigned)(~0);
static const unsigned int CONSTTIME_FALSE = 0;
static const unsigned char CONSTTIME_TRUE_8 = 0xff;
static const unsigned char CONSTTIME_FALSE_8 = 0;
+static const size_t CONSTTIME_TRUE_S = ~((size_t)0);
+static const size_t CONSTTIME_FALSE_S = 0;
static int test_binary_op(unsigned int (*op) (unsigned int a, unsigned int b),
const char *op_name, unsigned int a, unsigned int b,
return 0;
}
+static int test_binary_op_s(size_t (*op) (size_t a, size_t b),
+ const char *op_name, size_t a, size_t b,
+ int is_true)
+{
+ size_t c = op(a, b);
+ if (is_true && c != CONSTTIME_TRUE_S) {
+ fprintf(stderr, "Test failed for %s(%"OSSLzu", %"OSSLzu
+ "): expected %"OSSLzu" (TRUE), got %"OSSLzu"\n",
+ op_name, a, b, CONSTTIME_TRUE_S, c);
+ return 1;
+ } else if (!is_true && c != CONSTTIME_FALSE_S) {
+ fprintf(stderr, "Test failed for %s(%"OSSLzu", %"OSSLzu
+ "): expected %" OSSLzu " (FALSE), got %"OSSLzu"\n",
+ op_name, a, b, CONSTTIME_FALSE_S, c);
+ return 1;
+ }
+ return 0;
+}
+
static int test_is_zero(unsigned int a)
{
unsigned int c = constant_time_is_zero(a);
return 0;
}
+static int test_is_zero_s(size_t a)
+{
+ size_t c = constant_time_is_zero_s(a);
+ if (a == 0 && c != CONSTTIME_TRUE_S) {
+ fprintf(stderr, "Test failed for constant_time_is_zero_s(%"OSSLzu"): "
+ "expected %"OSSLzu" (TRUE), got %"OSSLzu"\n",
+ a, CONSTTIME_TRUE_S, c);
+ return 1;
+ } else if (a != 0 && c != CONSTTIME_FALSE) {
+ fprintf(stderr, "Test failed for constant_time_is_zero_s(%"OSSLzu"): "
+ "expected %"OSSLzu" (FALSE), got %"OSSLzu"\n",
+ a, CONSTTIME_FALSE_S, c);
+ return 1;
+ }
+ return 0;
+}
static int test_select(unsigned int a, unsigned int b)
{
unsigned int selected = constant_time_select(CONSTTIME_TRUE, a, b);
return 0;
}
+
+static int test_select_s(size_t a, size_t b)
+{
+ size_t selected = constant_time_select_s(CONSTTIME_TRUE_S, a, b);
+ if (selected != a) {
+ fprintf(stderr, "Test failed for constant_time_select_s(%"OSSLzu
+ ", %"OSSLzu",%"OSSLzu"): expected %"OSSLzu
+ "(first value), got %"OSSLzu"\n",
+ CONSTTIME_TRUE_S, a, b, a, selected);
+ return 1;
+ }
+ selected = constant_time_select_s(CONSTTIME_FALSE_S, a, b);
+ if (selected != b) {
+ fprintf(stderr, "Test failed for constant_time_select_s(%"OSSLzu
+ ", %"OSSLzu",%"OSSLzu"): expected %"OSSLzu
+ "(second value), got %"OSSLzu"\n",
+ CONSTTIME_FALSE_S, a, b, b, selected);
+ return 1;
+ }
+ return 0;
+}
+
static int test_eq_int(int a, int b)
{
unsigned int equal = constant_time_eq_int(a, b);
return 0;
}
+static int test_eq_s(size_t a, size_t b)
+{
+ size_t equal = constant_time_eq_s(a, b);
+ if (a == b && equal != CONSTTIME_TRUE_S) {
+ fprintf(stderr, "Test failed for constant_time_eq_int(%"OSSLzu
+ ", %"OSSLzu"): expected %"OSSLzu"(TRUE), got %"OSSLzu"\n",
+ a, b, CONSTTIME_TRUE_S, equal);
+ return 1;
+ } else if (a != b && equal != CONSTTIME_FALSE_S) {
+ fprintf(stderr, "Test failed for constant_time_eq_int(%"OSSLzu", %"
+ OSSLzu"): expected %"OSSLzu"(FALSE), got %"OSSLzu"\n",
+ a, b, CONSTTIME_FALSE_S, equal);
+ return 1;
+ }
+ return 0;
+}
+
static unsigned int test_values[] =
{ 0, 1, 1024, 12345, 32000, UINT_MAX / 2 - 1,
UINT_MAX / 2, UINT_MAX / 2 + 1, UINT_MAX - 1,
INT_MIN + 1
};
+static size_t test_values_s[] =
+ { 0, 1, 1024, 12345, 32000, SIZE_MAX / 2 - 1,
+ SIZE_MAX / 2, SIZE_MAX / 2 + 1, SIZE_MAX - 1,
+ SIZE_MAX
+};
+
int main(int argc, char *argv[])
{
unsigned int a, b, i, j;
int c, d;
unsigned char e, f;
+ size_t g, h;
int num_failed = 0, num_all = 0;
fprintf(stdout, "Testing constant time operations...\n");
+ if (OSSL_NELEM(test_values) != OSSL_NELEM(test_values_s)) {
+ fprintf(stdout, "Unexpected number of tests\n");
+ return EXIT_FAILURE;
+ }
+
for (i = 0; i < OSSL_NELEM(test_values); ++i) {
a = test_values[i];
+ g = test_values_s[i];
num_failed += test_is_zero(a);
num_failed += test_is_zero_8(a);
- num_all += 2;
+ num_failed += test_is_zero_s(g);
+ num_all += 3;
for (j = 0; j < OSSL_NELEM(test_values); ++j) {
b = test_values[j];
+ h = test_values[j];
num_failed += test_binary_op(&constant_time_lt,
"constant_time_lt", a, b, a < b);
num_failed += test_binary_op_8(&constant_time_lt_8,
"constant_time_lt_8", a, b, a < b);
+ num_failed += test_binary_op_s(&constant_time_lt_s,
+ "constant_time_lt_s", g, h, g < h);
num_failed += test_binary_op(&constant_time_lt,
- "constant_time_lt_8", b, a, b < a);
+ "constant_time_lt", b, a, b < a);
num_failed += test_binary_op_8(&constant_time_lt_8,
"constant_time_lt_8", b, a, b < a);
+ num_failed += test_binary_op_s(&constant_time_lt_s,
+ "constant_time_lt_s", h, g, h < g);
num_failed += test_binary_op(&constant_time_ge,
"constant_time_ge", a, b, a >= b);
num_failed += test_binary_op_8(&constant_time_ge_8,
"constant_time_ge_8", a, b,
a >= b);
+ num_failed += test_binary_op_s(&constant_time_ge_s,
+ "constant_time_ge_s", g, h, g >= h);
num_failed +=
test_binary_op(&constant_time_ge, "constant_time_ge", b, a,
b >= a);
num_failed +=
test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8", b,
a, b >= a);
+ num_failed +=
+ test_binary_op_s(&constant_time_ge_s, "constant_time_ge_s", h, g,
+ h >= g);
num_failed +=
test_binary_op(&constant_time_eq, "constant_time_eq", a, b,
a == b);
num_failed +=
test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", a,
b, a == b);
+ num_failed +=
+ test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s", g, h,
+ g == h);
num_failed +=
test_binary_op(&constant_time_eq, "constant_time_eq", b, a,
b == a);
num_failed +=
test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", b,
a, b == a);
+ num_failed +=
+ test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s", h, g,
+ h == g);
num_failed += test_select(a, b);
- num_all += 13;
+ num_failed += test_select_s(g, h);
+ num_failed += test_eq_s(g, h);
+ num_all += 21;
}
}
}
if (!num_failed) {
- fprintf(stdout, "ok (ran %d tests)\n", num_all);
+ fprintf(stdout, "success (ran %d tests)\n", num_all);
return EXIT_SUCCESS;
} else {
fprintf(stdout, "%d of %d tests failed!\n", num_failed, num_all);
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