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3d328a44 | 1 | /* |
b0edda11 | 2 | * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved. |
3d328a44 JL |
3 | * Copyright 2017 Ribose Inc. All Rights Reserved. |
4 | * | |
5 | * Licensed under the OpenSSL license (the "License"). You may not use | |
6 | * this file except in compliance with the License. You can obtain a copy | |
7 | * in the file LICENSE in the source distribution or at | |
8 | * https://www.openssl.org/source/license.html | |
9 | */ | |
10 | ||
11 | #include <stdio.h> | |
12 | #include <stdlib.h> | |
13 | #include <string.h> | |
14 | ||
15 | #include <openssl/bio.h> | |
16 | #include <openssl/evp.h> | |
17 | #include <openssl/bn.h> | |
18 | #include <openssl/crypto.h> | |
19 | #include <openssl/err.h> | |
20 | #include <openssl/rand.h> | |
21 | #include "testutil.h" | |
22 | ||
23 | #ifndef OPENSSL_NO_SM2 | |
24 | ||
e425f90f | 25 | # include "internal/sm2.h" |
3d328a44 JL |
26 | |
27 | static RAND_METHOD fake_rand; | |
28 | static const RAND_METHOD *saved_rand; | |
29 | ||
30 | static uint8_t *fake_rand_bytes = NULL; | |
31 | static size_t fake_rand_bytes_offset = 0; | |
32 | ||
33 | static int get_faked_bytes(unsigned char *buf, int num) | |
34 | { | |
35 | int i; | |
36 | ||
37 | if (fake_rand_bytes == NULL) | |
38 | return saved_rand->bytes(buf, num); | |
39 | ||
40 | for (i = 0; i != num; ++i) | |
41 | buf[i] = fake_rand_bytes[fake_rand_bytes_offset + i]; | |
42 | fake_rand_bytes_offset += num; | |
43 | return 1; | |
44 | } | |
45 | ||
46 | static int start_fake_rand(const char *hex_bytes) | |
47 | { | |
48 | /* save old rand method */ | |
49 | if (!TEST_ptr(saved_rand = RAND_get_rand_method())) | |
50 | return 0; | |
51 | ||
52 | fake_rand = *saved_rand; | |
53 | /* use own random function */ | |
54 | fake_rand.bytes = get_faked_bytes; | |
55 | ||
56 | fake_rand_bytes = OPENSSL_hexstr2buf(hex_bytes, NULL); | |
57 | fake_rand_bytes_offset = 0; | |
58 | ||
59 | /* set new RAND_METHOD */ | |
60 | if (!TEST_true(RAND_set_rand_method(&fake_rand))) | |
61 | return 0; | |
62 | return 1; | |
63 | } | |
64 | ||
65 | static int restore_rand(void) | |
66 | { | |
67 | OPENSSL_free(fake_rand_bytes); | |
68 | fake_rand_bytes = NULL; | |
69 | fake_rand_bytes_offset = 0; | |
70 | if (!TEST_true(RAND_set_rand_method(saved_rand))) | |
71 | return 0; | |
72 | return 1; | |
73 | } | |
74 | ||
75 | static EC_GROUP *create_EC_group(const char *p_hex, const char *a_hex, | |
76 | const char *b_hex, const char *x_hex, | |
77 | const char *y_hex, const char *order_hex, | |
78 | const char *cof_hex) | |
79 | { | |
80 | BIGNUM *p = NULL; | |
81 | BIGNUM *a = NULL; | |
82 | BIGNUM *b = NULL; | |
83 | BIGNUM *g_x = NULL; | |
84 | BIGNUM *g_y = NULL; | |
85 | BIGNUM *order = NULL; | |
86 | BIGNUM *cof = NULL; | |
87 | EC_POINT *generator = NULL; | |
88 | EC_GROUP *group = NULL; | |
89 | ||
90 | BN_hex2bn(&p, p_hex); | |
91 | BN_hex2bn(&a, a_hex); | |
92 | BN_hex2bn(&b, b_hex); | |
93 | ||
94 | group = EC_GROUP_new_curve_GFp(p, a, b, NULL); | |
95 | BN_free(p); | |
96 | BN_free(a); | |
97 | BN_free(b); | |
98 | ||
99 | if (group == NULL) | |
100 | return NULL; | |
101 | ||
102 | generator = EC_POINT_new(group); | |
103 | if (generator == NULL) | |
104 | return NULL; | |
105 | ||
106 | BN_hex2bn(&g_x, x_hex); | |
107 | BN_hex2bn(&g_y, y_hex); | |
108 | ||
109 | if (EC_POINT_set_affine_coordinates_GFp(group, generator, g_x, g_y, NULL) == | |
110 | 0) | |
111 | return NULL; | |
112 | ||
113 | BN_free(g_x); | |
114 | BN_free(g_y); | |
115 | ||
116 | BN_hex2bn(&order, order_hex); | |
117 | BN_hex2bn(&cof, cof_hex); | |
118 | ||
119 | if (EC_GROUP_set_generator(group, generator, order, cof) == 0) | |
120 | return NULL; | |
121 | ||
122 | EC_POINT_free(generator); | |
123 | BN_free(order); | |
124 | BN_free(cof); | |
125 | ||
126 | return group; | |
127 | } | |
128 | ||
129 | ||
130 | static int test_sm2(const EC_GROUP *group, | |
131 | const char *userid, | |
132 | const char *privkey_hex, | |
133 | const char *message, | |
134 | const char *k_hex, const char *r_hex, const char *s_hex) | |
135 | { | |
136 | const size_t msg_len = strlen(message); | |
137 | int ok = -1; | |
138 | BIGNUM *priv = NULL; | |
139 | EC_POINT *pt = NULL; | |
140 | EC_KEY *key = NULL; | |
141 | ECDSA_SIG *sig = NULL; | |
142 | const BIGNUM *sig_r = NULL; | |
143 | const BIGNUM *sig_s = NULL; | |
144 | BIGNUM *r = NULL; | |
145 | BIGNUM *s = NULL; | |
146 | ||
147 | BN_hex2bn(&priv, privkey_hex); | |
148 | ||
149 | key = EC_KEY_new(); | |
150 | EC_KEY_set_group(key, group); | |
151 | EC_KEY_set_private_key(key, priv); | |
152 | ||
153 | pt = EC_POINT_new(group); | |
154 | EC_POINT_mul(group, pt, priv, NULL, NULL, NULL); | |
155 | EC_KEY_set_public_key(key, pt); | |
156 | ||
157 | start_fake_rand(k_hex); | |
158 | sig = SM2_do_sign(key, EVP_sm3(), userid, (const uint8_t *)message, msg_len); | |
159 | restore_rand(); | |
160 | ||
161 | if (sig == NULL) | |
162 | return 0; | |
163 | ||
164 | ECDSA_SIG_get0(sig, &sig_r, &sig_s); | |
165 | ||
166 | BN_hex2bn(&r, r_hex); | |
167 | BN_hex2bn(&s, s_hex); | |
168 | ||
169 | if (BN_cmp(r, sig_r) != 0) { | |
170 | printf("Signature R mismatch: "); | |
171 | BN_print_fp(stdout, r); | |
172 | printf(" != "); | |
173 | BN_print_fp(stdout, sig_r); | |
174 | printf("\n"); | |
175 | ok = 0; | |
176 | } | |
177 | if (BN_cmp(s, sig_s) != 0) { | |
178 | printf("Signature S mismatch: "); | |
179 | BN_print_fp(stdout, s); | |
180 | printf(" != "); | |
181 | BN_print_fp(stdout, sig_s); | |
182 | printf("\n"); | |
183 | ok = 0; | |
184 | } | |
185 | ||
186 | ok = SM2_do_verify(key, EVP_sm3(), sig, userid, (const uint8_t *)message, msg_len); | |
187 | ||
188 | ECDSA_SIG_free(sig); | |
189 | EC_POINT_free(pt); | |
190 | EC_KEY_free(key); | |
191 | BN_free(priv); | |
192 | BN_free(r); | |
193 | BN_free(s); | |
194 | ||
195 | return ok; | |
196 | } | |
197 | ||
198 | static int sm2_sig_test(void) | |
199 | { | |
200 | int rc = 0; | |
201 | /* From draft-shen-sm2-ecdsa-02 */ | |
202 | EC_GROUP *test_group = | |
203 | create_EC_group | |
204 | ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3", | |
205 | "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498", | |
206 | "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A", | |
207 | "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D", | |
208 | "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2", | |
209 | "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7", | |
210 | "1"); | |
211 | ||
212 | if (test_group == NULL) | |
213 | return 0; | |
214 | ||
215 | rc = test_sm2(test_group, | |
216 | "ALICE123@YAHOO.COM", | |
217 | "128B2FA8BD433C6C068C8D803DFF79792A519A55171B1B650C23661D15897263", | |
218 | "message digest", | |
219 | "006CB28D99385C175C94F94E934817663FC176D925DD72B727260DBAAE1FB2F96F", | |
220 | "40F1EC59F793D9F49E09DCEF49130D4194F79FB1EED2CAA55BACDB49C4E755D1", | |
221 | "6FC6DAC32C5D5CF10C77DFB20F7C2EB667A457872FB09EC56327A67EC7DEEBE7"); | |
222 | ||
223 | EC_GROUP_free(test_group); | |
224 | ||
225 | return rc; | |
226 | } | |
227 | ||
228 | #endif | |
229 | ||
230 | int setup_tests(void) | |
231 | { | |
232 | #ifdef OPENSSL_NO_SM2 | |
233 | TEST_note("SM2 is disabled."); | |
234 | #else | |
235 | ADD_TEST(sm2_sig_test); | |
236 | #endif | |
237 | return 1; | |
238 | } |