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openssl/test/constant_time_test.c

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/*
* Copyright 2014-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* 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 <stdio.h>
#include <stdlib.h>
#include "e_os.h"
#include "internal/constant_time_locl.h"
#include "testutil.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 uint64_t CONSTTIME_TRUE_64 = (uint64_t)(~(uint64_t)0);
static uint64_t CONSTTIME_FALSE_64 = 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)
{
if (is_true && !TEST_uint_eq(op(a, b), CONSTTIME_TRUE))
return 0;
if (!is_true && !TEST_uint_eq(op(a, b), CONSTTIME_FALSE))
return 0;
return 1;
}
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)
{
if (is_true && !TEST_uint_eq(op(a, b), CONSTTIME_TRUE_8))
return 0;
if (!is_true && !TEST_uint_eq(op(a, b), CONSTTIME_FALSE_8))
return 0;
return 1;
}
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)
{
if (is_true && !TEST_size_t_eq(op(a,b), CONSTTIME_TRUE_S))
return 0;
if (!is_true && !TEST_uint_eq(op(a,b), CONSTTIME_FALSE_S))
return 0;
return 1;
}
static int test_binary_op_64(uint64_t (*op)(uint64_t a, uint64_t b),
const char *op_name, uint64_t a, uint64_t b,
int is_true)
{
uint64_t c = op(a, b);
if (is_true && c != CONSTTIME_TRUE_64) {
TEST_error("TRUE %s op failed", op_name);
BIO_printf(bio_err, "a=%jx b=%jx\n", (uintmax_t)a, (uintmax_t)b);
return 0;
} else if (!is_true && c != CONSTTIME_FALSE_64) {
TEST_error("FALSE %s op failed", op_name);
BIO_printf(bio_err, "a=%jx b=%jx\n", (uintmax_t)a, (uintmax_t)b);
return 0;
}
return 1;
}
static int test_is_zero(unsigned int a)
{
if (a == 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_TRUE))
return 0;
if (a != 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_FALSE))
return 0;
return 1;
}
static int test_is_zero_8(unsigned int a)
{
if (a == 0 && !TEST_uint_eq(constant_time_is_zero_8(a), CONSTTIME_TRUE_8))
return 0;
if (a != 0 && !TEST_uint_eq(constant_time_is_zero_8(a), CONSTTIME_FALSE_8))
return 0;
return 1;
}
static int test_is_zero_s(unsigned int a)
{
if (a == 0 && !TEST_size_t_eq(constant_time_is_zero_s(a), CONSTTIME_TRUE_S))
return 0;
if (a != 0 && !TEST_uint_eq(constant_time_is_zero_s(a), CONSTTIME_FALSE_S))
return 0;
return 1;
}
static int test_select(unsigned int a, unsigned int b)
{
if (!TEST_uint_eq(constant_time_select(CONSTTIME_TRUE, a, b), a))
return 0;
if (!TEST_uint_eq(constant_time_select(CONSTTIME_FALSE, a, b), b))
return 0;
return 1;
}
static int test_select_8(unsigned char a, unsigned char b)
{
if (!TEST_uint_eq(constant_time_select_8(CONSTTIME_TRUE_8, a, b), a))
return 0;
if (!TEST_uint_eq(constant_time_select_8(CONSTTIME_FALSE_8, a, b), b))
return 0;
return 1;
}
static int test_select_s(unsigned char a, unsigned char b)
{
if (!TEST_uint_eq(constant_time_select_s(CONSTTIME_TRUE_S, a, b), a))
return 0;
if (!TEST_uint_eq(constant_time_select_s(CONSTTIME_FALSE_S, a, b), b))
return 0;
return 1;
}
static int test_select_64(uint64_t a, uint64_t b)
{
uint64_t selected = constant_time_select_64(CONSTTIME_TRUE_64, a, b);
if (selected != a) {
TEST_error("test_select_64 TRUE failed");
BIO_printf(bio_err, "a=%jx b=%jx got %jx wanted a\n",
(uintmax_t)a, (uintmax_t)b, (uintmax_t)selected);
return 0;
}
selected = constant_time_select_64(CONSTTIME_FALSE_64, a, b);
if (selected != b) {
BIO_printf(bio_err, "a=%jx b=%jx got %jx wanted b\n",
(uintmax_t)a, (uintmax_t)b, (uintmax_t)selected);
return 0;
}
return 1;
}
static int test_select_int(int a, int b)
{
if (!TEST_int_eq(constant_time_select_int(CONSTTIME_TRUE, a, b), a))
return 0;
if (!TEST_int_eq(constant_time_select_int(CONSTTIME_FALSE, a, b), b))
return 0;
return 1;
}
static int test_eq_int_8(int a, int b)
{
if (a == b && !TEST_int_eq(constant_time_eq_int_8(a, b), CONSTTIME_TRUE_8))
return 0;
if (a != b && !TEST_int_eq(constant_time_eq_int_8(a, b), CONSTTIME_FALSE_8))
return 0;
return 1;
}
static int test_eq_s(size_t a, size_t b)
{
if (a == b && !TEST_size_t_eq(constant_time_eq_s(a, b), CONSTTIME_TRUE_S))
return 0;
if (a != b && !TEST_int_eq(constant_time_eq_s(a, b), CONSTTIME_FALSE_S))
return 0;
return 1;
}
static int test_eq_int(int a, int b)
{
if (a == b && !TEST_uint_eq(constant_time_eq_int(a, b), CONSTTIME_TRUE))
return 0;
if (a != b && !TEST_uint_eq(constant_time_eq_int(a, b), CONSTTIME_FALSE))
return 0;
return 1;
}
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
};
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
};
static uint64_t test_values_64[] = {
0, 1, 1024, 12345, 32000, 32000000, 32000000001, UINT64_MAX / 2,
UINT64_MAX / 2 + 1, UINT64_MAX - 1, UINT64_MAX
};
static int test_sizeofs(void)
{
if (!TEST_uint_eq(OSSL_NELEM(test_values), OSSL_NELEM(test_values_s)))
return 0;
return 1;
}
static int test_binops(int i)
{
unsigned int a = test_values[i];
unsigned int g = test_values_s[i];
int j;
int ret = 1;
if (!test_is_zero(a) || !test_is_zero_8(a) || !test_is_zero_s(g))
ret = 0;
for (j = 0; j < (int)OSSL_NELEM(test_values); ++j) {
unsigned int b = test_values[j];
unsigned int h = test_values[j];
if (!test_select(a, b)
|| !test_select_s(g, h)
|| !test_eq_s(g, h)
|| !test_binary_op(&constant_time_lt, "ct_lt",
a, b, a < b)
|| !test_binary_op_8(&constant_time_lt_8, "constant_time_lt_8",
a, b, a < b)
|| !test_binary_op_s(&constant_time_lt_s, "constant_time_lt_s",
g, h, g < h)
|| !test_binary_op(&constant_time_lt, "constant_time_lt",
b, a, b < a)
|| !test_binary_op_8(&constant_time_lt_8, "constant_time_lt_8",
b, a, b < a)
|| !test_binary_op_s(&constant_time_lt_s, "constant_time_lt_s",
h, g, h < g)
|| !test_binary_op(&constant_time_ge, "constant_time_ge",
a, b, a >= b)
|| !test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8",
a, b, a >= b)
|| !test_binary_op_s(&constant_time_ge_s, "constant_time_ge_s",
g, h, g >= h)
|| !test_binary_op(&constant_time_ge, "constant_time_ge",
b, a, b >= a)
|| !test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8",
b, a, b >= a)
|| !test_binary_op_s(&constant_time_ge_s, "constant_time_ge_s",
h, g, h >= g)
|| !test_binary_op(&constant_time_eq, "constant_time_eq",
a, b, a == b)
|| !test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8",
a, b, a == b)
|| !test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s",
g, h, g == h)
|| !test_binary_op(&constant_time_eq, "constant_time_eq",
b, a, b == a)
|| !test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8",
b, a, b == a)
|| !test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s",
h, g, h == g)) {
ret = 0;
}
}
return ret;
}
static int test_signed(int i)
{
int c = signed_test_values[i];
unsigned int j;
int ret = 1;
for (j = 0; j < OSSL_NELEM(signed_test_values); ++j) {
int d = signed_test_values[j];
if (!test_select_int(c, d)
|| !test_eq_int(c, d)
|| !test_eq_int_8(c, d))
ret = 0;
}
return ret;
}
static int test_8values(int i)
{
unsigned char e = test_values_8[i];
unsigned int j;
int ret = 1;
for (j = 0; j < sizeof(test_values_8); ++j) {
unsigned char f = test_values_8[j];
if (!test_select_8(e, f))
ret = 0;
}
return ret;
}
static int test_64values(int i)
{
uint64_t g = test_values_64[i];
int j, ret = 1;
for (j = i + 1; j < (int)OSSL_NELEM(test_values_64); j++) {
uint64_t h = test_values_64[j];
if (!test_binary_op_64(&constant_time_lt_64, "constant_time_lt_64",
g, h, g < h)
|| !test_select_64(g, h)) {
TEST_info("test_64values failed i=%d j=%d", i, j);
ret = 0;
}
}
return ret;
}
int setup_tests(void)
{
ADD_TEST(test_sizeofs);
ADD_ALL_TESTS(test_binops, OSSL_NELEM(test_values));
ADD_ALL_TESTS(test_signed, OSSL_NELEM(signed_test_values));
ADD_ALL_TESTS(test_8values, OSSL_NELEM(test_values_8));
ADD_ALL_TESTS(test_64values, OSSL_NELEM(test_values_64));
return 1;
}
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