1 /* $OpenBSD: sm2sigtest.c,v 1.1.1.1 2021/08/18 16:06:56 tb Exp $ */ 2 /* 3 * Copyright (c) 2017, 2019 Ribose Inc 4 * 5 * Permission to use, copy, modify, and/or distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <stdio.h> 19 #include <stdlib.h> 20 #include <string.h> 21 22 #include <openssl/bio.h> 23 #include <openssl/evp.h> 24 #include <openssl/bn.h> 25 #include <openssl/crypto.h> 26 #include <openssl/err.h> 27 #include <openssl/rand.h> 28 29 #ifdef OPENSSL_NO_SM2 30 int 31 main(int argc, char *argv[]) 32 { 33 printf("No SM2 support\n"); 34 return (0); 35 } 36 #else 37 #include <openssl/sm2.h> 38 #include "sm2_locl.h" 39 40 static EC_GROUP * 41 create_EC_group(const char *p_hex, const char *a_hex, const char *b_hex, 42 const char *x_hex, const char *y_hex, const char *order_hex, 43 const char *cof_hex) 44 { 45 BIGNUM *p = NULL; 46 BIGNUM *a = NULL; 47 BIGNUM *b = NULL; 48 BIGNUM *g_x = NULL; 49 BIGNUM *g_y = NULL; 50 BIGNUM *order = NULL; 51 BIGNUM *cof = NULL; 52 EC_POINT *generator = NULL; 53 EC_GROUP *group = NULL; 54 55 BN_hex2bn(&p, p_hex); 56 BN_hex2bn(&a, a_hex); 57 BN_hex2bn(&b, b_hex); 58 59 group = EC_GROUP_new_curve_GFp(p, a, b, NULL); 60 BN_free(p); 61 BN_free(a); 62 BN_free(b); 63 64 if (group == NULL) 65 return NULL; 66 67 generator = EC_POINT_new(group); 68 if (generator == NULL) 69 return NULL; 70 71 BN_hex2bn(&g_x, x_hex); 72 BN_hex2bn(&g_y, y_hex); 73 74 if (EC_POINT_set_affine_coordinates(group, generator, g_x, g_y, 75 NULL) == 0) 76 return NULL; 77 78 BN_free(g_x); 79 BN_free(g_y); 80 81 BN_hex2bn(&order, order_hex); 82 BN_hex2bn(&cof, cof_hex); 83 84 if (EC_GROUP_set_generator(group, generator, order, cof) == 0) 85 return NULL; 86 87 EC_POINT_free(generator); 88 BN_free(order); 89 BN_free(cof); 90 91 return group; 92 } 93 94 95 static int 96 test_sm2(const EC_GROUP *group, const char *userid, const char *privkey_hex, 97 const char *message) 98 { 99 const size_t msg_len = strlen(message); 100 int ok = -1; 101 BIGNUM *priv = NULL; 102 EC_POINT *pt = NULL; 103 EC_KEY *key = NULL; 104 ECDSA_SIG *sig = NULL; 105 const BIGNUM *sig_r = NULL; 106 const BIGNUM *sig_s = NULL; 107 108 BN_hex2bn(&priv, privkey_hex); 109 110 key = EC_KEY_new(); 111 EC_KEY_set_group(key, group); 112 EC_KEY_set_private_key(key, priv); 113 114 pt = EC_POINT_new(group); 115 EC_POINT_mul(group, pt, priv, NULL, NULL, NULL); 116 EC_KEY_set_public_key(key, pt); 117 118 sig = sm2_do_sign(key, EVP_sm3(), userid, strlen(userid), 119 (const uint8_t *)message, msg_len); 120 121 if (sig == NULL) 122 return 0; 123 124 ECDSA_SIG_get0(sig, &sig_r, &sig_s); 125 126 ok = sm2_do_verify(key, EVP_sm3(), sig, userid, strlen(userid), 127 (const uint8_t *)message, msg_len); 128 129 ECDSA_SIG_free(sig); 130 EC_POINT_free(pt); 131 EC_KEY_free(key); 132 BN_free(priv); 133 134 return ok; 135 } 136 137 int 138 main(int argc, char **argv) 139 { 140 int rc = 0; 141 /* From draft-shen-sm2-ecdsa-02 */ 142 EC_GROUP *test_group = 143 create_EC_group 144 ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3", 145 "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498", 146 "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A", 147 "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D", 148 "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2", 149 "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7", 150 "1"); 151 152 if (test_group == NULL) 153 return 1; 154 155 rc = test_sm2(test_group, "ALICE123@YAHOO.COM", 156 "128B2FA8BD433C6C068C8D803DFF79792A519A55171B1B650C23661D15897263", 157 "message digest"); 158 159 EC_GROUP_free(test_group); 160 161 if (rc <= 0) 162 return 1; 163 164 165 printf("SUCCESS\n"); 166 167 return 0; 168 } 169 170 #endif 171