2 * Copyright 2014-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
14 #include "internal/constant_time_locl.h"
16 #include "internal/numbers.h"
18 static const unsigned int CONSTTIME_TRUE = (unsigned)(~0);
19 static const unsigned int CONSTTIME_FALSE = 0;
20 static const unsigned char CONSTTIME_TRUE_8 = 0xff;
21 static const unsigned char CONSTTIME_FALSE_8 = 0;
22 static const size_t CONSTTIME_TRUE_S = ~((size_t)0);
23 static const size_t CONSTTIME_FALSE_S = 0;
24 static uint64_t CONSTTIME_TRUE_64 = (uint64_t)(~(uint64_t)0);
25 static uint64_t CONSTTIME_FALSE_64 = 0;
27 static int test_binary_op(unsigned int (*op) (unsigned int a, unsigned int b),
28 const char *op_name, unsigned int a, unsigned int b,
31 if (is_true && !TEST_uint_eq(op(a, b), CONSTTIME_TRUE))
33 if (!is_true && !TEST_uint_eq(op(a, b), CONSTTIME_FALSE))
38 static int test_binary_op_8(unsigned
39 char (*op) (unsigned int a, unsigned int b),
40 const char *op_name, unsigned int a,
41 unsigned int b, int is_true)
43 if (is_true && !TEST_uint_eq(op(a, b), CONSTTIME_TRUE_8))
45 if (!is_true && !TEST_uint_eq(op(a, b), CONSTTIME_FALSE_8))
50 static int test_binary_op_s(size_t (*op) (size_t a, size_t b),
51 const char *op_name, size_t a, size_t b,
54 if (is_true && !TEST_size_t_eq(op(a,b), CONSTTIME_TRUE_S))
56 if (!is_true && !TEST_uint_eq(op(a,b), CONSTTIME_FALSE_S))
61 static int test_binary_op_64(uint64_t (*op)(uint64_t a, uint64_t b),
62 const char *op_name, uint64_t a, uint64_t b,
65 uint64_t c = op(a, b);
67 if (is_true && c != CONSTTIME_TRUE_64) {
68 TEST_error("TRUE %s op failed", op_name);
69 BIO_printf(bio_err, "a=%jx b=%jx\n", a, b);
71 } else if (!is_true && c != CONSTTIME_FALSE_64) {
72 TEST_error("FALSE %s op failed", op_name);
73 BIO_printf(bio_err, "a=%jx b=%jx\n", a, b);
80 static int test_is_zero(unsigned int a)
82 if (a == 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_TRUE))
84 if (a != 0 && !TEST_uint_eq(constant_time_is_zero(a), CONSTTIME_FALSE))
89 static int test_is_zero_8(unsigned int a)
91 if (a == 0 && !TEST_uint_eq(constant_time_is_zero_8(a), CONSTTIME_TRUE_8))
93 if (a != 0 && !TEST_uint_eq(constant_time_is_zero_8(a), CONSTTIME_FALSE_8))
98 static int test_is_zero_s(unsigned int a)
100 if (a == 0 && !TEST_size_t_eq(constant_time_is_zero_s(a), CONSTTIME_TRUE_S))
102 if (a != 0 && !TEST_uint_eq(constant_time_is_zero_s(a), CONSTTIME_FALSE_S))
107 static int test_select(unsigned int a, unsigned int b)
109 if (!TEST_uint_eq(constant_time_select(CONSTTIME_TRUE, a, b), a))
111 if (!TEST_uint_eq(constant_time_select(CONSTTIME_FALSE, a, b), b))
116 static int test_select_8(unsigned char a, unsigned char b)
118 if (!TEST_uint_eq(constant_time_select_8(CONSTTIME_TRUE_8, a, b), a))
120 if (!TEST_uint_eq(constant_time_select_8(CONSTTIME_FALSE_8, a, b), b))
125 static int test_select_s(unsigned char a, unsigned char b)
127 if (!TEST_uint_eq(constant_time_select_s(CONSTTIME_TRUE_S, a, b), a))
129 if (!TEST_uint_eq(constant_time_select_s(CONSTTIME_FALSE_S, a, b), b))
134 static int test_select_64(uint64_t a, uint64_t b)
136 uint64_t selected = constant_time_select_64(CONSTTIME_TRUE_64, a, b);
139 TEST_error("test_select_64 TRUE failed");
140 BIO_printf(bio_err, "a=%jx b=%jx got %jx wanted a\n", a, b, selected);
143 selected = constant_time_select_64(CONSTTIME_FALSE_64, a, b);
145 BIO_printf(bio_err, "a=%jx b=%jx got %jx wanted b\n", a, b, selected);
151 static int test_select_int(int a, int b)
153 if (!TEST_int_eq(constant_time_select_int(CONSTTIME_TRUE, a, b), a))
155 if (!TEST_int_eq(constant_time_select_int(CONSTTIME_FALSE, a, b), b))
160 static int test_eq_int_8(int a, int b)
162 if (a == b && !TEST_int_eq(constant_time_eq_int_8(a, b), CONSTTIME_TRUE_8))
164 if (a != b && !TEST_int_eq(constant_time_eq_int_8(a, b), CONSTTIME_FALSE_8))
169 static int test_eq_s(size_t a, size_t b)
171 if (a == b && !TEST_size_t_eq(constant_time_eq_s(a, b), CONSTTIME_TRUE_S))
173 if (a != b && !TEST_int_eq(constant_time_eq_s(a, b), CONSTTIME_FALSE_S))
178 static int test_eq_int(int a, int b)
180 if (a == b && !TEST_uint_eq(constant_time_eq_int(a, b), CONSTTIME_TRUE))
182 if (a != b && !TEST_uint_eq(constant_time_eq_int(a, b), CONSTTIME_FALSE))
187 static unsigned int test_values[] = {
188 0, 1, 1024, 12345, 32000, UINT_MAX / 2 - 1,
189 UINT_MAX / 2, UINT_MAX / 2 + 1, UINT_MAX - 1,
193 static unsigned char test_values_8[] = {
194 0, 1, 2, 20, 32, 127, 128, 129, 255
197 static int signed_test_values[] = {
198 0, 1, -1, 1024, -1024, 12345, -12345,
199 32000, -32000, INT_MAX, INT_MIN, INT_MAX - 1,
203 static size_t test_values_s[] = {
204 0, 1, 1024, 12345, 32000, SIZE_MAX / 2 - 1,
205 SIZE_MAX / 2, SIZE_MAX / 2 + 1, SIZE_MAX - 1,
209 static uint64_t test_values_64[] = {
210 0, 1, 1024, 12345, 32000, 32000000, 32000000001, UINT64_MAX / 2,
211 UINT64_MAX / 2 + 1, UINT64_MAX - 1, UINT64_MAX
214 static int test_sizeofs(void)
216 if (!TEST_uint_eq(OSSL_NELEM(test_values), OSSL_NELEM(test_values_s)))
221 static int test_binops(int i)
223 unsigned int a = test_values[i];
224 unsigned int g = test_values_s[i];
228 if (!test_is_zero(a) || !test_is_zero_8(a) || !test_is_zero_s(g))
231 for (j = 0; j < (int)OSSL_NELEM(test_values); ++j) {
232 unsigned int b = test_values[j];
233 unsigned int h = test_values[j];
235 if (!test_select(a, b)
236 || !test_select_s(g, h)
238 || !test_binary_op(&constant_time_lt, "ct_lt",
240 || !test_binary_op_8(&constant_time_lt_8, "constant_time_lt_8",
242 || !test_binary_op_s(&constant_time_lt_s, "constant_time_lt_s",
244 || !test_binary_op(&constant_time_lt, "constant_time_lt",
246 || !test_binary_op_8(&constant_time_lt_8, "constant_time_lt_8",
248 || !test_binary_op_s(&constant_time_lt_s, "constant_time_lt_s",
250 || !test_binary_op(&constant_time_ge, "constant_time_ge",
252 || !test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8",
254 || !test_binary_op_s(&constant_time_ge_s, "constant_time_ge_s",
256 || !test_binary_op(&constant_time_ge, "constant_time_ge",
258 || !test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8",
260 || !test_binary_op_s(&constant_time_ge_s, "constant_time_ge_s",
262 || !test_binary_op(&constant_time_eq, "constant_time_eq",
264 || !test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8",
266 || !test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s",
268 || !test_binary_op(&constant_time_eq, "constant_time_eq",
270 || !test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8",
272 || !test_binary_op_s(&constant_time_eq_s, "constant_time_eq_s",
280 static int test_signed(int i)
282 int c = signed_test_values[i];
286 for (j = 0; j < OSSL_NELEM(signed_test_values); ++j) {
287 int d = signed_test_values[j];
289 if (!test_select_int(c, d)
290 || !test_eq_int(c, d)
291 || !test_eq_int_8(c, d))
297 static int test_8values(int i)
299 unsigned char e = test_values_8[i];
303 for (j = 0; j < sizeof(test_values_8); ++j) {
304 unsigned char f = test_values_8[j];
306 if (!test_select_8(e, f))
312 static int test_64values(int i)
314 uint64_t g = test_values_64[i];
317 for (j = i + 1; j < (int)OSSL_NELEM(test_values_64); j++) {
318 uint64_t h = test_values_64[j];
320 if (!test_binary_op_64(&constant_time_lt_64, "constant_time_lt_64",
322 || !test_select_64(g, h)) {
323 TEST_info("test_64values failed i=%d j=%d", i, j);
330 int setup_tests(void)
332 ADD_TEST(test_sizeofs);
333 ADD_ALL_TESTS(test_binops, OSSL_NELEM(test_values));
334 ADD_ALL_TESTS(test_signed, OSSL_NELEM(signed_test_values));
335 ADD_ALL_TESTS(test_8values, OSSL_NELEM(test_values_8));
336 ADD_ALL_TESTS(test_64values, OSSL_NELEM(test_values_64));