[thirdparty/openssl.git] / test / constant_time_test.c

/*
 * Copyright 2014-2016 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 "internal/constant_time_locl.h"
#include "e_os.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 < OSSL_NELEM(test_values); ++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 < OSSL_NELEM(test_values); ++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 < OSSL_NELEM(signed_test_values); ++i) {
        c = signed_test_values[i];
        for (j = 0; j < OSSL_NELEM(signed_test_values); ++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, "success (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;
    }
}
Commit	Line	Data
440e5d80 RS	1	/*
440e5d80 RS	2	* Copyright 2014-2016 The OpenSSL Project Authors. All Rights Reserved.
5a3d21c0	3	*
440e5d80 RS	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
5a3d21c0 EK	8	*/
5a3d21c0 EK	9
68570797	10	#include "internal/constant_time_locl.h"
80e0ecbf	11	#include "e_os.h"
5a3d21c0 EK	12
	13	#include <limits.h>
	14	#include <stdio.h>
	15	#include <stdlib.h>
	16
294d1e36	17	static const unsigned int CONSTTIME_TRUE = (unsigned)(~0);
5a3d21c0	18	static const unsigned int CONSTTIME_FALSE = 0;
294d1e36	19	static const unsigned char CONSTTIME_TRUE_8 = 0xff;
5a3d21c0 EK	20	static const unsigned char CONSTTIME_FALSE_8 = 0;
5a3d21c0 EK	21
0f113f3e MC	22	static int test_binary_op(unsigned int (*op) (unsigned int a, unsigned int b),
	23	const char *op_name, unsigned int a, unsigned int b,
	24	int is_true)
	25	{
	26	unsigned c = op(a, b);
	27	if (is_true && c != CONSTTIME_TRUE) {
	28	fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
	29	"(TRUE), got %du\n", op_name, a, b, CONSTTIME_TRUE, c);
	30	return 1;
	31	} else if (!is_true && c != CONSTTIME_FALSE) {
	32	fprintf(stderr, "Test failed for %s(%du, %du): expected %du "
	33	"(FALSE), got %du\n", op_name, a, b, CONSTTIME_FALSE, c);
	34	return 1;
	35	}
	36	return 0;
	37	}
5a3d21c0	38
0f113f3e MC	39	static int test_binary_op_8(unsigned
	40	char (*op) (unsigned int a, unsigned int b),
	41	const char *op_name, unsigned int a,
	42	unsigned int b, int is_true)
	43	{
	44	unsigned char c = op(a, b);
	45	if (is_true && c != CONSTTIME_TRUE_8) {
	46	fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
	47	"(TRUE), got %u\n", op_name, a, b, CONSTTIME_TRUE_8, c);
	48	return 1;
	49	} else if (!is_true && c != CONSTTIME_FALSE_8) {
	50	fprintf(stderr, "Test failed for %s(%du, %du): expected %u "
	51	"(FALSE), got %u\n", op_name, a, b, CONSTTIME_FALSE_8, c);
	52	return 1;
	53	}
	54	return 0;
	55	}
5a3d21c0 EK	56
5a3d21c0 EK	57	static int test_is_zero(unsigned int a)
0f113f3e MC	58	{
	59	unsigned int c = constant_time_is_zero(a);
	60	if (a == 0 && c != CONSTTIME_TRUE) {
	61	fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
	62	"expected %du (TRUE), got %du\n", a, CONSTTIME_TRUE, c);
	63	return 1;
	64	} else if (a != 0 && c != CONSTTIME_FALSE) {
	65	fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
	66	"expected %du (FALSE), got %du\n", a, CONSTTIME_FALSE, c);
	67	return 1;
	68	}
	69	return 0;
	70	}
5a3d21c0 EK	71
5a3d21c0 EK	72	static int test_is_zero_8(unsigned int a)
0f113f3e MC	73	{
	74	unsigned char c = constant_time_is_zero_8(a);
	75	if (a == 0 && c != CONSTTIME_TRUE_8) {
	76	fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
	77	"expected %u (TRUE), got %u\n", a, CONSTTIME_TRUE_8, c);
	78	return 1;
	79	} else if (a != 0 && c != CONSTTIME_FALSE) {
	80	fprintf(stderr, "Test failed for constant_time_is_zero(%du): "
	81	"expected %u (FALSE), got %u\n", a, CONSTTIME_FALSE_8, c);
	82	return 1;
	83	}
	84	return 0;
	85	}
5a3d21c0	86
294d1e36	87	static int test_select(unsigned int a, unsigned int b)
0f113f3e MC	88	{
	89	unsigned int selected = constant_time_select(CONSTTIME_TRUE, a, b);
	90	if (selected != a) {
	91	fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
	92	"%du): expected %du(first value), got %du\n",
	93	CONSTTIME_TRUE, a, b, a, selected);
	94	return 1;
	95	}
	96	selected = constant_time_select(CONSTTIME_FALSE, a, b);
	97	if (selected != b) {
	98	fprintf(stderr, "Test failed for constant_time_select(%du, %du,"
	99	"%du): expected %du(second value), got %du\n",
	100	CONSTTIME_FALSE, a, b, b, selected);
	101	return 1;
	102	}
	103	return 0;
	104	}
294d1e36 EK	105
294d1e36 EK	106	static int test_select_8(unsigned char a, unsigned char b)
0f113f3e MC	107	{
	108	unsigned char selected = constant_time_select_8(CONSTTIME_TRUE_8, a, b);
	109	if (selected != a) {
	110	fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
	111	"%u): expected %u(first value), got %u\n",
	112	CONSTTIME_TRUE, a, b, a, selected);
	113	return 1;
	114	}
	115	selected = constant_time_select_8(CONSTTIME_FALSE_8, a, b);
	116	if (selected != b) {
	117	fprintf(stderr, "Test failed for constant_time_select(%u, %u,"
	118	"%u): expected %u(second value), got %u\n",
	119	CONSTTIME_FALSE, a, b, b, selected);
	120	return 1;
	121	}
	122	return 0;
	123	}
294d1e36 EK	124
294d1e36 EK	125	static int test_select_int(int a, int b)
0f113f3e MC	126	{
	127	int selected = constant_time_select_int(CONSTTIME_TRUE, a, b);
	128	if (selected != a) {
	129	fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
	130	"%d): expected %d(first value), got %d\n",
	131	CONSTTIME_TRUE, a, b, a, selected);
	132	return 1;
	133	}
	134	selected = constant_time_select_int(CONSTTIME_FALSE, a, b);
	135	if (selected != b) {
	136	fprintf(stderr, "Test failed for constant_time_select(%du, %d,"
	137	"%d): expected %d(second value), got %d\n",
	138	CONSTTIME_FALSE, a, b, b, selected);
	139	return 1;
	140	}
	141	return 0;
	142	}
294d1e36	143
455b65df	144	static int test_eq_int(int a, int b)
0f113f3e MC	145	{
	146	unsigned int equal = constant_time_eq_int(a, b);
	147	if (a == b && equal != CONSTTIME_TRUE) {
	148	fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
	149	"expected %du(TRUE), got %du\n", a, b, CONSTTIME_TRUE, equal);
	150	return 1;
	151	} else if (a != b && equal != CONSTTIME_FALSE) {
	152	fprintf(stderr, "Test failed for constant_time_eq_int(%d, %d): "
	153	"expected %du(FALSE), got %du\n",
	154	a, b, CONSTTIME_FALSE, equal);
	155	return 1;
	156	}
	157	return 0;
	158	}
455b65df EK	159
455b65df EK	160	static int test_eq_int_8(int a, int b)
0f113f3e MC	161	{
	162	unsigned char equal = constant_time_eq_int_8(a, b);
	163	if (a == b && equal != CONSTTIME_TRUE_8) {
	164	fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
	165	"expected %u(TRUE), got %u\n", a, b, CONSTTIME_TRUE_8, equal);
	166	return 1;
	167	} else if (a != b && equal != CONSTTIME_FALSE_8) {
	168	fprintf(stderr, "Test failed for constant_time_eq_int_8(%d, %d): "
	169	"expected %u(FALSE), got %u\n",
	170	a, b, CONSTTIME_FALSE_8, equal);
	171	return 1;
	172	}
	173	return 0;
	174	}
294d1e36	175
0f113f3e MC	176	static unsigned int test_values[] =
	177	{ 0, 1, 1024, 12345, 32000, UINT_MAX / 2 - 1,
	178	UINT_MAX / 2, UINT_MAX / 2 + 1, UINT_MAX - 1,
	179	UINT_MAX
	180	};
5a3d21c0	181
0f113f3e MC	182	static unsigned char test_values_8[] =
0f113f3e MC	183	{ 0, 1, 2, 20, 32, 127, 128, 129, 255 };
294d1e36	184
0f113f3e MC	185	static int signed_test_values[] = { 0, 1, -1, 1024, -1024, 12345, -12345,
	186	32000, -32000, INT_MAX, INT_MIN, INT_MAX - 1,
	187	INT_MIN + 1
	188	};
294d1e36	189
5a3d21c0	190	int main(int argc, char *argv[])
0f113f3e MC	191	{
	192	unsigned int a, b, i, j;
	193	int c, d;
	194	unsigned char e, f;
	195	int num_failed = 0, num_all = 0;
	196	fprintf(stdout, "Testing constant time operations...\n");
5a3d21c0	197
bdcb1a2c	198	for (i = 0; i < OSSL_NELEM(test_values); ++i) {
0f113f3e MC	199	a = test_values[i];
	200	num_failed += test_is_zero(a);
	201	num_failed += test_is_zero_8(a);
	202	num_all += 2;
bdcb1a2c	203	for (j = 0; j < OSSL_NELEM(test_values); ++j) {
0f113f3e MC	204	b = test_values[j];
	205	num_failed += test_binary_op(&constant_time_lt,
	206	"constant_time_lt", a, b, a < b);
	207	num_failed += test_binary_op_8(&constant_time_lt_8,
	208	"constant_time_lt_8", a, b, a < b);
	209	num_failed += test_binary_op(&constant_time_lt,
	210	"constant_time_lt_8", b, a, b < a);
	211	num_failed += test_binary_op_8(&constant_time_lt_8,
	212	"constant_time_lt_8", b, a, b < a);
	213	num_failed += test_binary_op(&constant_time_ge,
	214	"constant_time_ge", a, b, a >= b);
	215	num_failed += test_binary_op_8(&constant_time_ge_8,
	216	"constant_time_ge_8", a, b,
	217	a >= b);
	218	num_failed +=
	219	test_binary_op(&constant_time_ge, "constant_time_ge", b, a,
	220	b >= a);
	221	num_failed +=
	222	test_binary_op_8(&constant_time_ge_8, "constant_time_ge_8", b,
	223	a, b >= a);
	224	num_failed +=
	225	test_binary_op(&constant_time_eq, "constant_time_eq", a, b,
	226	a == b);
	227	num_failed +=
	228	test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", a,
	229	b, a == b);
	230	num_failed +=
	231	test_binary_op(&constant_time_eq, "constant_time_eq", b, a,
	232	b == a);
	233	num_failed +=
	234	test_binary_op_8(&constant_time_eq_8, "constant_time_eq_8", b,
	235	a, b == a);
	236	num_failed += test_select(a, b);
	237	num_all += 13;
	238	}
	239	}
294d1e36	240
bdcb1a2c	241	for (i = 0; i < OSSL_NELEM(signed_test_values); ++i) {
0f113f3e	242	c = signed_test_values[i];
bdcb1a2c	243	for (j = 0; j < OSSL_NELEM(signed_test_values); ++j) {
0f113f3e MC	244	d = signed_test_values[j];
	245	num_failed += test_select_int(c, d);
	246	num_failed += test_eq_int(c, d);
	247	num_failed += test_eq_int_8(c, d);
	248	num_all += 3;
	249	}
	250	}
294d1e36	251
0f113f3e MC	252	for (i = 0; i < sizeof(test_values_8); ++i) {
	253	e = test_values_8[i];
	254	for (j = 0; j < sizeof(test_values_8); ++j) {
	255	f = test_values_8[j];
	256	num_failed += test_select_8(e, f);
	257	num_all += 1;
	258	}
	259	}
5a3d21c0	260
0f113f3e	261	if (!num_failed) {
127d2590	262	fprintf(stdout, "success (ran %d tests)\n", num_all);
0f113f3e MC	263	return EXIT_SUCCESS;
	264	} else {
	265	fprintf(stdout, "%d of %d tests failed!\n", num_failed, num_all);
	266	return EXIT_FAILURE;
	267	}
	268	}