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-rw-r--r--crypto/constant_time_test.c304
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diff --git a/crypto/constant_time_test.c b/crypto/constant_time_test.c
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-/* crypto/constant_time_test.c */
-/*-
- * Utilities for constant-time cryptography.
- *
- * 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.]
- */
-
-#include "../crypto/constant_time_locl.h"
-
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.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 int test_binary_op(unsigned int (*op) (unsigned int a, unsigned int b),
- const char *op_name, unsigned int a, unsigned int b,
- int is_true)
-{
- unsigned c = op(a, b);
- if (is_true && c != CONSTTIME_TRUE) {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
- "(TRUE), got %du\n", op_name, a, b, CONSTTIME_TRUE, c);
- return 1;
- } else if (!is_true && c != CONSTTIME_FALSE) {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
- "(FALSE), got %du\n", op_name, a, b, CONSTTIME_FALSE, c);
- return 1;
- }
- return 0;
-}
-
-static int test_binary_op_8(unsigned
- char (*op) (unsigned int a, unsigned int b),
- const char *op_name, unsigned int a,
- unsigned int b, int is_true)
-{
- unsigned char c = op(a, b);
- if (is_true && c != CONSTTIME_TRUE_8) {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
- "(TRUE), got %u\n", op_name, a, b, CONSTTIME_TRUE_8, c);
- return 1;
- } else if (!is_true && c != CONSTTIME_FALSE_8) {
- fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
- "(FALSE), got %u\n", op_name, a, b, CONSTTIME_FALSE_8, c);
- return 1;
- }
- return 0;
-}
-
-static int test_is_zero(unsigned int a)
-{
- unsigned int c = constant_time_is_zero(a);
- if (a == 0 && c != CONSTTIME_TRUE) {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %du (TRUE), got %du\n", a, CONSTTIME_TRUE, c);
- return 1;
- } else if (a != 0 && c != CONSTTIME_FALSE) {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %du (FALSE), got %du\n", a, CONSTTIME_FALSE, c);
- return 1;
- }
- return 0;
-}
-
-static int test_is_zero_8(unsigned int a)
-{
- unsigned char c = constant_time_is_zero_8(a);
- if (a == 0 && c != CONSTTIME_TRUE_8) {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %u (TRUE), got %u\n", a, CONSTTIME_TRUE_8, c);
- return 1;
- } else if (a != 0 && c != CONSTTIME_FALSE) {
- fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
- "expected %u (FALSE), got %u\n", a, CONSTTIME_FALSE_8, 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);
- if (selected != a) {
- fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
- "%du): expected %du(first value), got %du\n",
- CONSTTIME_TRUE, a, b, a, selected);
- return 1;
- }
- selected = constant_time_select(CONSTTIME_FALSE, a, b);
- if (selected != b) {
- fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
- "%du): expected %du(second value), got %du\n",
- CONSTTIME_FALSE, a, b, b, selected);
- return 1;
- }
- return 0;
-}
-
-static int test_select_8(unsigned char a, unsigned char b)
-{
- unsigned char selected = constant_time_select_8(CONSTTIME_TRUE_8, a, b);
- if (selected != a) {
- fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
- "%u): expected %u(first value), got %u\n",
- CONSTTIME_TRUE, a, b, a, selected);
- return 1;
- }
- selected = constant_time_select_8(CONSTTIME_FALSE_8, a, b);
- if (selected != b) {
- fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
- "%u): expected %u(second value), got %u\n",
- CONSTTIME_FALSE, a, b, b, selected);
- return 1;
- }
- return 0;
-}
-
-static int test_select_int(int a, int b)
-{
- int selected = constant_time_select_int(CONSTTIME_TRUE, a, b);
- if (selected != a) {
- fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
- "%d): expected %d(first value), got %d\n",
- CONSTTIME_TRUE, a, b, a, selected);
- return 1;
- }
- selected = constant_time_select_int(CONSTTIME_FALSE, a, b);
- if (selected != b) {
- fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
- "%d): expected %d(second value), got %d\n",
- CONSTTIME_FALSE, 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);
- if (a == b && equal != CONSTTIME_TRUE) {
- fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
- "expected %du(TRUE), got %du\n", a, b, CONSTTIME_TRUE, equal);
- return 1;
- } else if (a != b && equal != CONSTTIME_FALSE) {
- fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
- "expected %du(FALSE), got %du\n",
- a, b, CONSTTIME_FALSE, equal);
- return 1;
- }
- return 0;
-}
-
-static int test_eq_int_8(int a, int b)
-{
- unsigned char equal = constant_time_eq_int_8(a, b);
- if (a == b && equal != CONSTTIME_TRUE_8) {
- fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
- "expected %u(TRUE), got %u\n", a, b, CONSTTIME_TRUE_8, equal);
- return 1;
- } else if (a != b && equal != CONSTTIME_FALSE_8) {
- fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
- "expected %u(FALSE), got %u\n",
- a, b, CONSTTIME_FALSE_8, 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,
- UINT_MAX
-};
-
-static unsigned char test_values_8[] =
- { 0, 1, 2, 20, 32, 127, 128, 129, 255 };
-
-static int signed_test_values[] = { 0, 1, -1, 1024, -1024, 12345, -12345,
- 32000, -32000, INT_MAX, INT_MIN, INT_MAX - 1,
- INT_MIN + 1
-};
-
-int main(int argc, char *argv[])
-{
- unsigned int a, b, i, j;
- int c, d;
- unsigned char e, f;
- int num_failed = 0, num_all = 0;
- fprintf(stdout, "Testing constant time operations...\n");
-
- for (i = 0; i < sizeof(test_values) / sizeof(int); ++i) {
- a = test_values[i];
- num_failed += test_is_zero(a);
- num_failed += test_is_zero_8(a);
- num_all += 2;
- for (j = 0; j < sizeof(test_values) / sizeof(int); ++j) {
- b = 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(&constant_time_lt,
- "constant_time_lt_8", 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(&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(&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(&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(&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_select(a, b);
- num_all += 13;
- }
- }
-
- for (i = 0; i < sizeof(signed_test_values) / sizeof(int); ++i) {
- c = signed_test_values[i];
- for (j = 0; j < sizeof(signed_test_values) / sizeof(int); ++j) {
- d = signed_test_values[j];
- num_failed += test_select_int(c, d);
- num_failed += test_eq_int(c, d);
- num_failed += test_eq_int_8(c, d);
- num_all += 3;
- }
- }
-
- for (i = 0; i < sizeof(test_values_8); ++i) {
- e = test_values_8[i];
- for (j = 0; j < sizeof(test_values_8); ++j) {
- f = test_values_8[j];
- num_failed += test_select_8(e, f);
- num_all += 1;
- }
- }
-
- if (!num_failed) {
- fprintf(stdout, "ok (ran %d tests)\n", num_all);
- return EXIT_SUCCESS;
- } else {
- fprintf(stdout, "%d of %d tests failed!\n", num_failed, num_all);
- return EXIT_FAILURE;
- }
-}
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