1 /*
2 * Copyright 2017-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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
8 */
9
10 /*
11 * Low level APIs are deprecated for public use, but still ok for internal use.
12 */
13 #include "internal/deprecated.h"
14
15 #include <stdio.h>
16 #include <stdlib.h>
17 #include <string.h>
18
19 #include <openssl/bio.h>
20 #include <openssl/evp.h>
21 #include <openssl/bn.h>
22 #include <openssl/crypto.h>
23 #include <openssl/err.h>
24 #include <openssl/rand.h>
25 #include "testutil.h"
26
27 #ifndef OPENSSL_NO_SM2
28
29 # include "crypto/sm2.h"
30
31 static fake_random_generate_cb get_faked_bytes;
32
33 static OSSL_PROVIDER *fake_rand = NULL;
34 static uint8_t *fake_rand_bytes = NULL;
35 static size_t fake_rand_bytes_offset = 0;
36 static size_t fake_rand_size = 0;
37
get_faked_bytes(unsigned char * buf,size_t num,ossl_unused const char * name,ossl_unused EVP_RAND_CTX * ctx)38 static int get_faked_bytes(unsigned char *buf, size_t num,
39 ossl_unused const char *name,
40 ossl_unused EVP_RAND_CTX *ctx)
41 {
42 if (!TEST_ptr(fake_rand_bytes) || !TEST_size_t_gt(fake_rand_size, 0))
43 return 0;
44
45 while (num-- > 0) {
46 if (fake_rand_bytes_offset >= fake_rand_size)
47 fake_rand_bytes_offset = 0;
48 *buf++ = fake_rand_bytes[fake_rand_bytes_offset++];
49 }
50
51 return 1;
52 }
53
start_fake_rand(const char * hex_bytes)54 static int start_fake_rand(const char *hex_bytes)
55 {
56 OPENSSL_free(fake_rand_bytes);
57 fake_rand_bytes_offset = 0;
58 fake_rand_size = strlen(hex_bytes) / 2;
59 if (!TEST_ptr(fake_rand_bytes = OPENSSL_hexstr2buf(hex_bytes, NULL)))
60 return 0;
61
62 /* use own random function */
63 fake_rand_set_public_private_callbacks(NULL, get_faked_bytes);
64 return 1;
65
66 }
67
restore_rand(void)68 static void restore_rand(void)
69 {
70 fake_rand_set_public_private_callbacks(NULL, NULL);
71 OPENSSL_free(fake_rand_bytes);
72 fake_rand_bytes = NULL;
73 fake_rand_bytes_offset = 0;
74 }
75
create_EC_group(const char * p_hex,const char * a_hex,const char * b_hex,const char * x_hex,const char * y_hex,const char * order_hex,const char * cof_hex)76 static EC_GROUP *create_EC_group(const char *p_hex, const char *a_hex,
77 const char *b_hex, const char *x_hex,
78 const char *y_hex, const char *order_hex,
79 const char *cof_hex)
80 {
81 BIGNUM *p = NULL;
82 BIGNUM *a = NULL;
83 BIGNUM *b = NULL;
84 BIGNUM *g_x = NULL;
85 BIGNUM *g_y = NULL;
86 BIGNUM *order = NULL;
87 BIGNUM *cof = NULL;
88 EC_POINT *generator = NULL;
89 EC_GROUP *group = NULL;
90 int ok = 0;
91
92 if (!TEST_true(BN_hex2bn(&p, p_hex))
93 || !TEST_true(BN_hex2bn(&a, a_hex))
94 || !TEST_true(BN_hex2bn(&b, b_hex)))
95 goto done;
96
97 group = EC_GROUP_new_curve_GFp(p, a, b, NULL);
98 if (!TEST_ptr(group))
99 goto done;
100
101 generator = EC_POINT_new(group);
102 if (!TEST_ptr(generator))
103 goto done;
104
105 if (!TEST_true(BN_hex2bn(&g_x, x_hex))
106 || !TEST_true(BN_hex2bn(&g_y, y_hex))
107 || !TEST_true(EC_POINT_set_affine_coordinates(group, generator, g_x,
108 g_y, NULL)))
109 goto done;
110
111 if (!TEST_true(BN_hex2bn(&order, order_hex))
112 || !TEST_true(BN_hex2bn(&cof, cof_hex))
113 || !TEST_true(EC_GROUP_set_generator(group, generator, order, cof)))
114 goto done;
115
116 ok = 1;
117 done:
118 BN_free(p);
119 BN_free(a);
120 BN_free(b);
121 BN_free(g_x);
122 BN_free(g_y);
123 EC_POINT_free(generator);
124 BN_free(order);
125 BN_free(cof);
126 if (!ok) {
127 EC_GROUP_free(group);
128 group = NULL;
129 }
130
131 return group;
132 }
133
test_sm2_crypt(const EC_GROUP * group,const EVP_MD * digest,const char * privkey_hex,const char * message,const char * k_hex,const char * ctext_hex)134 static int test_sm2_crypt(const EC_GROUP *group,
135 const EVP_MD *digest,
136 const char *privkey_hex,
137 const char *message,
138 const char *k_hex, const char *ctext_hex)
139 {
140 const size_t msg_len = strlen(message);
141 BIGNUM *priv = NULL;
142 EC_KEY *key = NULL;
143 EC_POINT *pt = NULL;
144 unsigned char *expected = OPENSSL_hexstr2buf(ctext_hex, NULL);
145 size_t ctext_len = 0;
146 size_t ptext_len = 0;
147 uint8_t *ctext = NULL;
148 uint8_t *recovered = NULL;
149 size_t recovered_len = msg_len;
150 int rc = 0;
151
152 if (!TEST_ptr(expected)
153 || !TEST_true(BN_hex2bn(&priv, privkey_hex)))
154 goto done;
155
156 key = EC_KEY_new();
157 if (!TEST_ptr(key)
158 || !TEST_true(EC_KEY_set_group(key, group))
159 || !TEST_true(EC_KEY_set_private_key(key, priv)))
160 goto done;
161
162 pt = EC_POINT_new(group);
163 if (!TEST_ptr(pt)
164 || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
165 || !TEST_true(EC_KEY_set_public_key(key, pt))
166 || !TEST_true(ossl_sm2_ciphertext_size(key, digest, msg_len,
167 &ctext_len)))
168 goto done;
169
170 ctext = OPENSSL_zalloc(ctext_len);
171 if (!TEST_ptr(ctext))
172 goto done;
173
174 start_fake_rand(k_hex);
175 if (!TEST_true(ossl_sm2_encrypt(key, digest,
176 (const uint8_t *)message, msg_len,
177 ctext, &ctext_len))) {
178 restore_rand();
179 goto done;
180 }
181 restore_rand();
182
183 if (!TEST_mem_eq(ctext, ctext_len, expected, ctext_len))
184 goto done;
185
186 if (!TEST_true(ossl_sm2_plaintext_size(ctext, ctext_len, &ptext_len))
187 || !TEST_int_eq(ptext_len, msg_len))
188 goto done;
189
190 recovered = OPENSSL_zalloc(ptext_len);
191 if (!TEST_ptr(recovered)
192 || !TEST_true(ossl_sm2_decrypt(key, digest, ctext, ctext_len,
193 recovered, &recovered_len))
194 || !TEST_int_eq(recovered_len, msg_len)
195 || !TEST_mem_eq(recovered, recovered_len, message, msg_len))
196 goto done;
197
198 rc = 1;
199 done:
200 BN_free(priv);
201 EC_POINT_free(pt);
202 OPENSSL_free(ctext);
203 OPENSSL_free(recovered);
204 OPENSSL_free(expected);
205 EC_KEY_free(key);
206 return rc;
207 }
208
sm2_crypt_test(void)209 static int sm2_crypt_test(void)
210 {
211 int testresult = 0;
212 EC_GROUP *gm_group = NULL;
213 EC_GROUP *test_group =
214 create_EC_group
215 ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
216 "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
217 "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
218 "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
219 "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
220 "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
221 "1");
222
223 if (!TEST_ptr(test_group))
224 goto done;
225
226 if (!test_sm2_crypt(
227 test_group,
228 EVP_sm3(),
229 "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
230 "encryption standard",
231 "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
232 "0092e8ff62146873c258557548500ab2df2a365e0609ab67640a1f6d57d7b17820"
233 "008349312695a3e1d2f46905f39a766487f2432e95d6be0cb009fe8c69fd8825a7",
234 "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF1"
235 "7F6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A2"
236 "4B84400F01B804209C3D7360C30156FAB7C80A0276712DA9D8094A634B766D3A"
237 "285E07480653426D0413650053A89B41C418B0C3AAD00D886C00286467"))
238 goto done;
239
240 /* Same test as above except using SHA-256 instead of SM3 */
241 if (!test_sm2_crypt(
242 test_group,
243 EVP_sha256(),
244 "1649AB77A00637BD5E2EFE283FBF353534AA7F7CB89463F208DDBC2920BB0DA0",
245 "encryption standard",
246 "004C62EEFD6ECFC2B95B92FD6C3D9575148AFA17425546D49018E5388D49DD7B4F"
247 "003da18008784352192d70f22c26c243174a447ba272fec64163dd4742bae8bc98"
248 "00df17605cf304e9dd1dfeb90c015e93b393a6f046792f790a6fa4228af67d9588",
249 "307B0220245C26FB68B1DDDDB12C4B6BF9F2B6D5FE60A383B0D18D1C4144ABF17F"
250 "6252E7022076CB9264C2A7E88E52B19903FDC47378F605E36811F5C07423A24B84"
251 "400F01B80420BE89139D07853100EFA763F60CBE30099EA3DF7F8F364F9D10A5E9"
252 "88E3C5AAFC0413229E6C9AEE2BB92CAD649FE2C035689785DA33"))
253 goto done;
254
255 /* From Annex C in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
256 gm_group = create_EC_group(
257 "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
258 "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
259 "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
260 "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
261 "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
262 "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
263 "1");
264
265 if (!TEST_ptr(gm_group))
266 goto done;
267
268 if (!test_sm2_crypt(
269 gm_group,
270 EVP_sm3(),
271 /* privkey (from which the encrypting public key is derived) */
272 "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
273 /* plaintext message */
274 "encryption standard",
275 /* ephemeral nonce k */
276 "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
277 /*
278 * expected ciphertext, the field values are from GM/T 0003.5-2012
279 * (Annex C), but serialized following the ASN.1 format specified
280 * in GM/T 0009-2012 (Sec. 7.2).
281 */
282 "307C" /* SEQUENCE, 0x7c bytes */
283 "0220" /* INTEGER, 0x20 bytes */
284 "04EBFC718E8D1798620432268E77FEB6415E2EDE0E073C0F4F640ECD2E149A73"
285 "0221" /* INTEGER, 0x21 bytes */
286 "00" /* leading 00 due to DER for pos. int with topmost bit set */
287 "E858F9D81E5430A57B36DAAB8F950A3C64E6EE6A63094D99283AFF767E124DF0"
288 "0420" /* OCTET STRING, 0x20 bytes */
289 "59983C18F809E262923C53AEC295D30383B54E39D609D160AFCB1908D0BD8766"
290 "0413" /* OCTET STRING, 0x13 bytes */
291 "21886CA989CA9C7D58087307CA93092D651EFA"))
292 goto done;
293
294 testresult = 1;
295 done:
296 EC_GROUP_free(test_group);
297 EC_GROUP_free(gm_group);
298
299 return testresult;
300 }
301
test_sm2_sign(const EC_GROUP * group,const char * userid,const char * privkey_hex,const char * message,const char * k_hex,const char * r_hex,const char * s_hex,int omit_pubkey)302 static int test_sm2_sign(const EC_GROUP *group,
303 const char *userid,
304 const char *privkey_hex,
305 const char *message,
306 const char *k_hex,
307 const char *r_hex,
308 const char *s_hex,
309 int omit_pubkey)
310 {
311 const size_t msg_len = strlen(message);
312 int ok = 0;
313 BIGNUM *priv = NULL;
314 EC_POINT *pt = NULL;
315 EC_KEY *key = NULL;
316 ECDSA_SIG *sig = NULL;
317 const BIGNUM *sig_r = NULL;
318 const BIGNUM *sig_s = NULL;
319 BIGNUM *r = NULL;
320 BIGNUM *s = NULL;
321
322 if (!TEST_true(BN_hex2bn(&priv, privkey_hex)))
323 goto done;
324
325 key = EC_KEY_new();
326 if (!TEST_ptr(key)
327 || !TEST_true(EC_KEY_set_group(key, group))
328 || !TEST_true(EC_KEY_set_private_key(key, priv)))
329 goto done;
330
331 if (omit_pubkey == 0) {
332 pt = EC_POINT_new(group);
333 if (!TEST_ptr(pt)
334 || !TEST_true(EC_POINT_mul(group, pt, priv, NULL, NULL, NULL))
335 || !TEST_true(EC_KEY_set_public_key(key, pt)))
336 goto done;
337 }
338
339 start_fake_rand(k_hex);
340 sig = ossl_sm2_do_sign(key, EVP_sm3(), (const uint8_t *)userid,
341 strlen(userid), (const uint8_t *)message, msg_len);
342 if (!TEST_ptr(sig)) {
343 restore_rand();
344 goto done;
345 }
346 restore_rand();
347
348 ECDSA_SIG_get0(sig, &sig_r, &sig_s);
349
350 if (!TEST_true(BN_hex2bn(&r, r_hex))
351 || !TEST_true(BN_hex2bn(&s, s_hex))
352 || !TEST_BN_eq(r, sig_r)
353 || !TEST_BN_eq(s, sig_s))
354 goto done;
355
356 ok = ossl_sm2_do_verify(key, EVP_sm3(), sig, (const uint8_t *)userid,
357 strlen(userid), (const uint8_t *)message, msg_len);
358
359 /* We goto done whether this passes or fails */
360 TEST_true(ok);
361
362 done:
363 ECDSA_SIG_free(sig);
364 EC_POINT_free(pt);
365 EC_KEY_free(key);
366 BN_free(priv);
367 BN_free(r);
368 BN_free(s);
369
370 return ok;
371 }
372
sm2_sig_test(void)373 static int sm2_sig_test(void)
374 {
375 int testresult = 0;
376 EC_GROUP *gm_group = NULL;
377 /* From draft-shen-sm2-ecdsa-02 */
378 EC_GROUP *test_group =
379 create_EC_group
380 ("8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3",
381 "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498",
382 "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A",
383 "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D",
384 "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2",
385 "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7",
386 "1");
387
388 if (!TEST_ptr(test_group))
389 goto done;
390
391 if (!TEST_true(test_sm2_sign(
392 test_group,
393 "ALICE123@YAHOO.COM",
394 "128B2FA8BD433C6C068C8D803DFF79792A519A55171B1B650C23661D15897263",
395 "message digest",
396 "006CB28D99385C175C94F94E934817663FC176D925DD72B727260DBAAE1FB2F96F"
397 "007c47811054c6f99613a578eb8453706ccb96384fe7df5c171671e760bfa8be3a",
398 "40F1EC59F793D9F49E09DCEF49130D4194F79FB1EED2CAA55BACDB49C4E755D1",
399 "6FC6DAC32C5D5CF10C77DFB20F7C2EB667A457872FB09EC56327A67EC7DEEBE7", 0)))
400 goto done;
401
402 /* From Annex A in both GM/T0003.5-2012 and GB/T 32918.5-2016.*/
403 gm_group = create_EC_group(
404 "fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",
405 "fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",
406 "28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",
407 "32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",
408 "bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",
409 "fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",
410 "1");
411
412 if (!TEST_ptr(gm_group))
413 goto done;
414
415 if (!TEST_true(test_sm2_sign(
416 gm_group,
417 /* the default ID specified in GM/T 0009-2012 (Sec. 10).*/
418 SM2_DEFAULT_USERID,
419 /* privkey */
420 "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
421 /* plaintext message */
422 "message digest",
423 /* ephemeral nonce k */
424 "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
425 /* expected signature, the field values are from GM/T 0003.5-2012,
426 Annex A. */
427 /* signature R, 0x20 bytes */
428 "F5A03B0648D2C4630EEAC513E1BB81A15944DA3827D5B74143AC7EACEEE720B3",
429 /* signature S, 0x20 bytes */
430 "B1B6AA29DF212FD8763182BC0D421CA1BB9038FD1F7F42D4840B69C485BBC1AA", 0)))
431 goto done;
432
433
434 /* Make sure we fail if we omit the public portion of the key */
435 if (!TEST_false(test_sm2_sign(
436 gm_group,
437 /* the default ID specified in GM/T 0009-2012 (Sec. 10).*/
438 SM2_DEFAULT_USERID,
439 /* privkey */
440 "3945208F7B2144B13F36E38AC6D39F95889393692860B51A42FB81EF4DF7C5B8",
441 /* plaintext message */
442 "message digest",
443 /* ephemeral nonce k */
444 "59276E27D506861A16680F3AD9C02DCCEF3CC1FA3CDBE4CE6D54B80DEAC1BC21",
445 /* expected signature, the field values are from GM/T 0003.5-2012,
446 Annex A. */
447 /* signature R, 0x20 bytes */
448 "F5A03B0648D2C4630EEAC513E1BB81A15944DA3827D5B74143AC7EACEEE720B3",
449 /* signature S, 0x20 bytes */
450 "B1B6AA29DF212FD8763182BC0D421CA1BB9038FD1F7F42D4840B69C485BBC1AA", 1)))
451 goto done;
452
453 testresult = 1;
454
455 done:
456 EC_GROUP_free(test_group);
457 EC_GROUP_free(gm_group);
458
459 return testresult;
460 }
461
462 #endif
463
setup_tests(void)464 int setup_tests(void)
465 {
466 #ifdef OPENSSL_NO_SM2
467 TEST_note("SM2 is disabled.");
468 #else
469 fake_rand = fake_rand_start(NULL);
470 if (fake_rand == NULL)
471 return 0;
472
473 ADD_TEST(sm2_crypt_test);
474 ADD_TEST(sm2_sig_test);
475 #endif
476 return 1;
477 }
478
cleanup_tests(void)479 void cleanup_tests(void)
480 {
481 #ifndef OPENSSL_NO_SM2
482 fake_rand_finish(fake_rand);
483 #endif
484 }
485
