| 1 | /*
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| 2 | * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /*
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| 11 | * Low level APIs are deprecated for public use, but still ok for internal use.
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| 12 | */
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| 13 | #include "internal/deprecated.h"
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| 14 |
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| 15 | #include <stdio.h>
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| 16 | #include <stdlib.h>
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| 17 | #include <string.h>
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| 18 |
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| 19 | #include <openssl/bio.h>
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| 20 | #include <openssl/evp.h>
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| 21 | #include <openssl/bn.h>
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| 22 | #include <openssl/crypto.h>
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| 23 | #include <openssl/err.h>
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| 24 | #include <openssl/rand.h>
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| 25 | #include "testutil.h"
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| 26 |
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| 27 | #ifndef OPENSSL_NO_SM2
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| 28 |
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| 29 | # include "crypto/sm2.h"
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| 30 |
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| 31 | static fake_random_generate_cb get_faked_bytes;
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| 32 |
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| 33 | static OSSL_PROVIDER *fake_rand = NULL;
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| 34 | static uint8_t *fake_rand_bytes = NULL;
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| 35 | static size_t fake_rand_bytes_offset = 0;
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| 36 | static size_t fake_rand_size = 0;
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| 37 |
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| 38 | static int get_faked_bytes(unsigned char *buf, size_t num,
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| 39 | ossl_unused const char *name,
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| 40 | ossl_unused EVP_RAND_CTX *ctx)
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| 41 | {
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| 42 | if (!TEST_ptr(fake_rand_bytes) || !TEST_size_t_gt(fake_rand_size, 0))
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| 43 | return 0;
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| 44 |
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| 45 | while (num-- > 0) {
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| 46 | if (fake_rand_bytes_offset >= fake_rand_size)
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| 47 | fake_rand_bytes_offset = 0;
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| 48 | *buf++ = fake_rand_bytes[fake_rand_bytes_offset++];
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| 49 | }
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| 50 |
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| 51 | return 1;
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| 52 | }
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| 53 |
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| 54 | static int start_fake_rand(const char *hex_bytes)
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| 55 | {
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| 56 | OPENSSL_free(fake_rand_bytes);
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| 57 | fake_rand_bytes_offset = 0;
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| 58 | fake_rand_size = strlen(hex_bytes) / 2;
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| 59 | if (!TEST_ptr(fake_rand_bytes = OPENSSL_hexstr2buf(hex_bytes, NULL)))
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| 60 | return 0;
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| 61 |
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| 62 | /* use own random function */
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| 63 | fake_rand_set_public_private_callbacks(NULL, get_faked_bytes);
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| 64 | return 1;
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| 65 |
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| 66 | }
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| 67 |
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| 68 | static void restore_rand(void)
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| 69 | {
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| 70 | fake_rand_set_public_private_callbacks(NULL, NULL);
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| 71 | OPENSSL_free(fake_rand_bytes);
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| 72 | fake_rand_bytes = NULL;
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| 73 | fake_rand_bytes_offset = 0;
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| 74 | }
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| 75 |
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| 76 | static EC_GROUP *create_EC_group(const char *p_hex, const char *a_hex,
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| 77 | const char *b_hex, const char *x_hex,
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| 78 | const char *y_hex, const char *order_hex,
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| 79 | const char *cof_hex)
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| 80 | {
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| 81 | BIGNUM *p = NULL;
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| 82 | BIGNUM *a = NULL;
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| 83 | BIGNUM *b = NULL;
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| 84 | BIGNUM *g_x = NULL;
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| 85 | BIGNUM *g_y = NULL;
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| 86 | BIGNUM *order = NULL;
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| 87 | BIGNUM *cof = NULL;
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| 88 | EC_POINT *generator = NULL;
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| 89 | EC_GROUP *group = NULL;
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| 90 | int ok = 0;
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| 91 |
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| 92 | if (!TEST_true(BN_hex2bn(&p, p_hex))
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| 93 | || !TEST_true(BN_hex2bn(&a, a_hex))
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| 94 | || !TEST_true(BN_hex2bn(&b, b_hex)))
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| 95 | goto done;
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| 96 |
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| 97 | group = EC_GROUP_new_curve_GFp(p, a, b, NULL);
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| 98 | if (!TEST_ptr(group))
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| 99 | goto done;
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| 100 |
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| 101 | generator = EC_POINT_new(group);
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| 102 | if (!TEST_ptr(generator))
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| 103 | goto done;
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| 104 |
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| 105 | if (!TEST_true(BN_hex2bn(&g_x, x_hex))
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| 106 | || !TEST_true(BN_hex2bn(&g_y, y_hex))
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| 107 | || !TEST_true(EC_POINT_set_affine_coordinates(group, generator, g_x,
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| 108 | g_y, NULL)))
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| 109 | goto done;
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| 110 |
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| 111 | if (!TEST_true(BN_hex2bn(&order, order_hex))
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| 112 | || !TEST_true(BN_hex2bn(&cof, cof_hex))
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| 113 | || !TEST_true(EC_GROUP_set_generator(group, generator, order, cof)))
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| 114 | goto done;
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| 115 |
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| 116 | ok = 1;
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| 117 | done:
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| 118 | BN_free(p);
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| 119 | BN_free(a);
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| 120 | BN_free(b);
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| 121 | BN_free(g_x);
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| 122 | BN_free(g_y);
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| 123 | EC_POINT_free(generator);
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| 124 | BN_free(order);
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| 125 | BN_free(cof);
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| 126 | if (!ok) {
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| 127 | EC_GROUP_free(group);
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| 128 | group = NULL;
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| 129 | }
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| 130 |
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| 131 | return group;
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| 132 | }
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| 133 |
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| 134 | static int test_sm2_crypt(const EC_GROUP *group,
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| 135 | const EVP_MD *digest,
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| 136 | const char *privkey_hex,
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| 137 | const char *message,
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| 138 | const char *k_hex, const char *ctext_hex)
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| 139 | {
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| 140 | const size_t msg_len = strlen(message);
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| 141 | BIGNUM *priv = NULL;
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| 142 | EC_KEY *key = NULL;
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| 143 | EC_POINT *pt = NULL;
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| 144 | unsigned char *expected = OPENSSL_hexstr2buf(ctext_hex, NULL);
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| 145 | size_t ctext_len = 0;
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| 146 | size_t ptext_len = 0;
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| 147 | uint8_t *ctext = NULL;
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| 148 | uint8_t *recovered = NULL;
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| 149 | size_t recovered_len = msg_len;
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| 150 | int rc = 0;
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| 151 |
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| 152 | if (!TEST_ptr(expected)
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| 153 | || !TEST_true(BN_hex2bn(&priv, privkey_hex)))
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| 154 | goto done;
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| 155 |
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| 156 | key = EC_KEY_new();
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| 157 | if (!TEST_ptr(key)
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| 158 | || !TEST_true(EC_KEY_set_group(key, group))
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| 159 | || !TEST_true(EC_KEY_set_private_key(key, priv)))
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| 160 | goto done;
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| 161 |
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| 162 | pt = EC_POINT_new(group);
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| 163 | if (!TEST_ptr(pt)
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| 164 | || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
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| 165 | || !TEST_true(EC_KEY_set_public_key(key, pt))
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| 166 | || !TEST_true(ossl_sm2_ciphertext_size(key, digest, msg_len,
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| 167 | &ctext_len)))
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| 168 | goto done;
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| 169 |
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| 170 | ctext = OPENSSL_zalloc(ctext_len);
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| 171 | if (!TEST_ptr(ctext))
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| 172 | goto done;
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| 173 |
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| 174 | start_fake_rand(k_hex);
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| 175 | if (!TEST_true(ossl_sm2_encrypt(key, digest,
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| 176 | (const uint8_t *)message, msg_len,
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| 177 | ctext, &ctext_len))) {
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| 178 | restore_rand();
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| 179 | goto done;
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| 180 | }
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| 181 | restore_rand();
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| 182 |
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| 183 | if (!TEST_mem_eq(ctext, ctext_len, expected, ctext_len))
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| 184 | goto done;
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| 185 |
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| 186 | if (!TEST_true(ossl_sm2_plaintext_size(ctext, ctext_len, &ptext_len))
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| 187 | || !TEST_int_eq(ptext_len, msg_len))
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| 188 | goto done;
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| 189 |
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| 190 | recovered = OPENSSL_zalloc(ptext_len);
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| 191 | if (!TEST_ptr(recovered)
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| 192 | || !TEST_true(ossl_sm2_decrypt(key, digest, ctext, ctext_len,
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| 193 | recovered, &recovered_len))
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| 194 | || !TEST_int_eq(recovered_len, msg_len)
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| 195 | || !TEST_mem_eq(recovered, recovered_len, message, msg_len))
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| 196 | goto done;
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| 197 |
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| 198 | rc = 1;
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| 199 | done:
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| 200 | BN_free(priv);
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| 201 | EC_POINT_free(pt);
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| 202 | OPENSSL_free(ctext);
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| 203 | OPENSSL_free(recovered);
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| 204 | OPENSSL_free(expected);
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| 205 | EC_KEY_free(key);
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| 206 | return rc;
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| 207 | }
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| 208 |
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| 209 | static int sm2_crypt_test(void)
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| 210 | {
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| 211 | int testresult = 0;
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| 212 | EC_GROUP *gm_group = NULL;
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| 213 | EC_GROUP *test_group =
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| 214 | create_EC_group
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| 215 | ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
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| 216 | "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
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| 217 | "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
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| 218 | "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
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| 219 | "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
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| 220 | "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
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| 221 | "1");
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| 222 |
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| 223 | if (!TEST_ptr(test_group))
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| 224 | goto done;
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| 225 |
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| 226 | if (!test_sm2_crypt(
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| 227 | test_group,
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| 228 | EVP_sm3(),
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| 229 | "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
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| 230 | "encryption standard",
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| 231 | "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
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| 232 | "0092e8ff62146873c258557548500ab2df2a365e0609ab67640a1f6d57d7b17820"
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| 233 | "008349312695a3e1d2f46905f39a766487f2432e95d6be0cb009fe8c69fd8825a7",
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| 234 | "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF1"
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| 235 | "7F6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A2"
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| 236 | "4B84400F01B804209C3D7360C30156FAB7C80A0276712DA9D8094A634B766D3A"
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| 237 | "285E07480653426D0413650053A89B41C418B0C3AAD00D886C00286467"))
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| 238 | goto done;
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| 239 |
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| 240 | /* Same test as above except using SHA-256 instead of SM3 */
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| 241 | if (!test_sm2_crypt(
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| 242 | test_group,
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| 243 | EVP_sha256(),
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| 244 | "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
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| 245 | "encryption standard",
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| 246 | "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
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| 247 | "003da18008784352192d70f22c26c243174a447ba272fec64163dd4742bae8bc98"
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| 248 | "00df17605cf304e9dd1dfeb90c015e93b393a6f046792f790a6fa4228af67d9588",
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| 249 | "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF17F"
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| 250 | "6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A24B84"
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| 251 | "400F01B80420BE89139D07853100EFA763F60CBE30099EA3DF7F8F364F9D10A5E9"
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| 252 | "88E3C5AAFC0413229E6C9AEE2BB92CAD649FE2C035689785DA33"))
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| 253 | goto done;
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| 254 |
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| 255 | /* From Annex C in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
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| 256 | gm_group = create_EC_group(
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| 257 | "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
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| 258 | "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
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| 259 | "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
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| 260 | "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
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| 261 | "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
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| 262 | "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
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| 263 | "1");
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| 264 |
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| 265 | if (!TEST_ptr(gm_group))
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| 266 | goto done;
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| 267 |
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| 268 | if (!test_sm2_crypt(
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| 269 | gm_group,
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| 270 | EVP_sm3(),
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| 271 | /* privkey (from which the encrypting public key is derived) */
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| 272 | "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
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| 273 | /* plaintext message */
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| 274 | "encryption standard",
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| 275 | /* ephemeral nonce k */
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| 276 | "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
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| 277 | /*
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| 278 | * expected ciphertext, the field values are from GM/T 0003.5-2012
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| 279 | * (Annex C), but serialized following the ASN.1 format specified
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| 280 | * in GM/T 0009-2012 (Sec. 7.2).
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| 281 | */
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| 282 | "307C" /* SEQUENCE, 0x7c bytes */
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| 283 | "0220" /* INTEGER, 0x20 bytes */
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| 284 | "04EBFC718E8D1798620432268E77FEB6415E2EDE0E073C0F4F640ECD2E149A73"
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| 285 | "0221" /* INTEGER, 0x21 bytes */
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| 286 | "00" /* leading 00 due to DER for pos. int with topmost bit set */
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| 287 | "E858F9D81E5430A57B36DAAB8F950A3C64E6EE6A63094D99283AFF767E124DF0"
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| 288 | "0420" /* OCTET STRING, 0x20 bytes */
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| 289 | "59983C18F809E262923C53AEC295D30383B54E39D609D160AFCB1908D0BD8766"
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| 290 | "0413" /* OCTET STRING, 0x13 bytes */
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| 291 | "21886CA989CA9C7D58087307CA93092D651EFA"))
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| 292 | goto done;
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| 293 |
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| 294 | testresult = 1;
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| 295 | done:
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| 296 | EC_GROUP_free(test_group);
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| 297 | EC_GROUP_free(gm_group);
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| 298 |
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| 299 | return testresult;
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| 300 | }
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| 301 |
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| 302 | static int test_sm2_sign(const EC_GROUP *group,
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| 303 | const char *userid,
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| 304 | const char *privkey_hex,
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| 305 | const char *message,
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| 306 | const char *k_hex,
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| 307 | const char *r_hex,
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| 308 | const char *s_hex)
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| 309 | {
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| 310 | const size_t msg_len = strlen(message);
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| 311 | int ok = 0;
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| 312 | BIGNUM *priv = NULL;
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| 313 | EC_POINT *pt = NULL;
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| 314 | EC_KEY *key = NULL;
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| 315 | ECDSA_SIG *sig = NULL;
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| 316 | const BIGNUM *sig_r = NULL;
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| 317 | const BIGNUM *sig_s = NULL;
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| 318 | BIGNUM *r = NULL;
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| 319 | BIGNUM *s = NULL;
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| 320 |
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| 321 | if (!TEST_true(BN_hex2bn(&priv, privkey_hex)))
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| 322 | goto done;
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| 323 |
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| 324 | key = EC_KEY_new();
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| 325 | if (!TEST_ptr(key)
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| 326 | || !TEST_true(EC_KEY_set_group(key, group))
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| 327 | || !TEST_true(EC_KEY_set_private_key(key, priv)))
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| 328 | goto done;
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| 329 |
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| 330 | pt = EC_POINT_new(group);
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| 331 | if (!TEST_ptr(pt)
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| 332 | || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
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| 333 | || !TEST_true(EC_KEY_set_public_key(key, pt)))
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| 334 | goto done;
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| 335 |
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| 336 | start_fake_rand(k_hex);
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| 337 | sig = ossl_sm2_do_sign(key, EVP_sm3(), (const uint8_t *)userid,
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| 338 | strlen(userid), (const uint8_t *)message, msg_len);
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| 339 | if (!TEST_ptr(sig)) {
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| 340 | restore_rand();
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| 341 | goto done;
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| 342 | }
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| 343 | restore_rand();
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| 344 |
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| 345 | ECDSA_SIG_get0(sig, &sig_r, &sig_s);
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| 346 |
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| 347 | if (!TEST_true(BN_hex2bn(&r, r_hex))
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| 348 | || !TEST_true(BN_hex2bn(&s, s_hex))
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| 349 | || !TEST_BN_eq(r, sig_r)
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| 350 | || !TEST_BN_eq(s, sig_s))
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| 351 | goto done;
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| 352 |
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| 353 | ok = ossl_sm2_do_verify(key, EVP_sm3(), sig, (const uint8_t *)userid,
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| 354 | strlen(userid), (const uint8_t *)message, msg_len);
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| 355 |
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| 356 | /* We goto done whether this passes or fails */
|
|---|
| 357 | TEST_true(ok);
|
|---|
| 358 |
|
|---|
| 359 | done:
|
|---|
| 360 | ECDSA_SIG_free(sig);
|
|---|
| 361 | EC_POINT_free(pt);
|
|---|
| 362 | EC_KEY_free(key);
|
|---|
| 363 | BN_free(priv);
|
|---|
| 364 | BN_free(r);
|
|---|
| 365 | BN_free(s);
|
|---|
| 366 |
|
|---|
| 367 | return ok;
|
|---|
| 368 | }
|
|---|
| 369 |
|
|---|
| 370 | static int sm2_sig_test(void)
|
|---|
| 371 | {
|
|---|
| 372 | int testresult = 0;
|
|---|
| 373 | /* From draft-shen-sm2-ecdsa-02 */
|
|---|
| 374 | EC_GROUP *test_group =
|
|---|
| 375 | create_EC_group
|
|---|
| 376 | ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
|
|---|
| 377 | "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
|
|---|
| 378 | "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
|
|---|
| 379 | "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
|
|---|
| 380 | "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
|
|---|
| 381 | "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
|
|---|
| 382 | "1");
|
|---|
| 383 |
|
|---|
| 384 | if (!TEST_ptr(test_group))
|
|---|
| 385 | goto done;
|
|---|
| 386 |
|
|---|
| 387 | if (!TEST_true(test_sm2_sign(
|
|---|
| 388 | test_group,
|
|---|
| 389 | "[email protected]",
|
|---|
| 390 | "128B2FA8BD433C6C068C8D803DFF79792A519A55171B1B650C23661D15897263",
|
|---|
| 391 | "message digest",
|
|---|
| 392 | "006CB28D99385C175C94F94E934817663FC176D925DD72B727260DBAAE1FB2F96F"
|
|---|
| 393 | "007c47811054c6f99613a578eb8453706ccb96384fe7df5c171671e760bfa8be3a",
|
|---|
| 394 | "40F1EC59F793D9F49E09DCEF49130D4194F79FB1EED2CAA55BACDB49C4E755D1",
|
|---|
| 395 | "6FC6DAC32C5D5CF10C77DFB20F7C2EB667A457872FB09EC56327A67EC7DEEBE7")))
|
|---|
| 396 | goto done;
|
|---|
| 397 |
|
|---|
| 398 | testresult = 1;
|
|---|
| 399 |
|
|---|
| 400 | done:
|
|---|
| 401 | EC_GROUP_free(test_group);
|
|---|
| 402 |
|
|---|
| 403 | return testresult;
|
|---|
| 404 | }
|
|---|
| 405 |
|
|---|
| 406 | #endif
|
|---|
| 407 |
|
|---|
| 408 | int setup_tests(void)
|
|---|
| 409 | {
|
|---|
| 410 | #ifdef OPENSSL_NO_SM2
|
|---|
| 411 | TEST_note("SM2 is disabled.");
|
|---|
| 412 | #else
|
|---|
| 413 | fake_rand = fake_rand_start(NULL);
|
|---|
| 414 | if (fake_rand == NULL)
|
|---|
| 415 | return 0;
|
|---|
| 416 |
|
|---|
| 417 | ADD_TEST(sm2_crypt_test);
|
|---|
| 418 | ADD_TEST(sm2_sig_test);
|
|---|
| 419 | #endif
|
|---|
| 420 | return 1;
|
|---|
| 421 | }
|
|---|
| 422 |
|
|---|
| 423 | void cleanup_tests(void)
|
|---|
| 424 | {
|
|---|
| 425 | #ifndef OPENSSL_NO_SM2
|
|---|
| 426 | fake_rand_finish(fake_rand);
|
|---|
| 427 | #endif
|
|---|
| 428 | }
|
|---|
