Validate legacy_version
[openssl.git] / test / ecstresstest.c
1 /*
2  * Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL licenses, (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  * https://www.openssl.org/source/license.html
8  * or in the file LICENSE in the source distribution.
9  */
10
11 #include "internal/nelem.h"
12 #include "testutil.h"
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <ctype.h>
18
19 #define NUM_REPEATS "1000000"
20
21 static int64_t num_repeats;
22 static int print_mode = 0;
23
24 #ifndef OPENSSL_NO_EC
25 # include <openssl/ec.h>
26 # include <openssl/err.h>
27 # include <openssl/obj_mac.h>
28 # include <openssl/objects.h>
29 # include <openssl/rand.h>
30 # include <openssl/bn.h>
31 # include <openssl/opensslconf.h>
32
33 static const char *kP256DefaultResult =
34     "A1E24B223B8E81BC1FFF99BAFB909EDB895FACDE7D6DA5EF5E7B3255FB378E0F";
35
36 /*
37  * Perform a deterministic walk on the curve, by starting from |point| and
38  * using the X-coordinate of the previous point as the next scalar for
39  * point multiplication.
40  * Returns the X-coordinate of the end result or NULL on error.
41  */
42 static BIGNUM *walk_curve(const EC_GROUP *group, EC_POINT *point, int64_t num)
43 {
44     BIGNUM *scalar = NULL;
45     int64_t i;
46
47     if (!TEST_ptr(scalar = BN_new())
48             || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, point,
49                                                               scalar,
50                                                               NULL, NULL)))
51         goto err;
52
53     for (i = 0; i < num; i++) {
54         if (!TEST_true(EC_POINT_mul(group, point, NULL, point, scalar, NULL))
55                 || !TEST_true(EC_POINT_get_affine_coordinates_GFp(group, point,
56                                                                   scalar,
57                                                                   NULL, NULL)))
58             goto err;
59     }
60     return scalar;
61
62 err:
63     BN_free(scalar);
64     return NULL;
65 }
66
67 static int test_curve(void)
68 {
69     EC_GROUP *group = NULL;
70     EC_POINT *point = NULL;
71     BIGNUM *result = NULL, *expected_result = NULL;
72     int ret = 0;
73
74     /*
75      * We currently hard-code P-256, though adaptation to other curves.
76      * would be straightforward.
77      */
78     if (!TEST_ptr(group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1))
79             || !TEST_ptr(point = EC_POINT_dup(EC_GROUP_get0_generator(group),
80                                               group))
81             || !TEST_ptr(result = walk_curve(group, point, num_repeats)))
82         return 0;
83
84     if (print_mode) {
85         BN_print(bio_out, result);
86         BIO_printf(bio_out, "\n");
87         ret = 1;
88     } else {
89         if (!TEST_true(BN_hex2bn(&expected_result, kP256DefaultResult))
90                 || !TEST_ptr(expected_result)
91                 || !TEST_BN_eq(result, expected_result))
92             goto err;
93         ret = 1;
94     }
95
96 err:
97     EC_GROUP_free(group);
98     EC_POINT_free(point);
99     BN_free(result);
100     BN_free(expected_result);
101     return ret;
102 }
103 #endif
104
105 static int atoi64(const char *in, int64_t *result)
106 {
107     int64_t ret = 0;
108
109     for ( ; *in != '\0'; in++) {
110         char c = *in;
111
112         if (!isdigit((unsigned char)c))
113             return 0;
114         ret *= 10;
115         ret += (c - '0');
116     }
117     *result = ret;
118     return 1;
119 }
120
121 /*
122  * Stress test the curve. If the '-num' argument is given, runs the loop
123  * |num| times and prints the resulting X-coordinate. Otherwise runs the test
124  * the default number of times and compares against the expected result.
125  */
126 int setup_tests(void)
127 {
128     const char *p;
129
130     if (!atoi64(NUM_REPEATS, &num_repeats)) {
131         TEST_error("Cannot parse " NUM_REPEATS);
132         return 0;
133     }
134     /*
135      * TODO(openssl-team): code under test/ should be able to reuse the option
136      * parsing framework currently in apps/.
137      */
138     p = test_get_option_argument("-num");
139     if (p != NULL) {
140         if (!atoi64(p, &num_repeats)
141                 || num_repeats < 0)
142             return 0;
143         print_mode = 1;
144     }
145
146 #ifndef OPENSSL_NO_EC
147     ADD_TEST(test_curve);
148 #endif
149     return 1;
150 }