forked from openssl/openssl
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathec_internal_test.c
428 lines (374 loc) · 13.7 KB
/
ec_internal_test.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/*
* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
/*
* Low level APIs are deprecated for public use, but still ok for internal use.
*/
#include "internal/deprecated.h"
#include "internal/nelem.h"
#include "testutil.h"
#include <openssl/ec.h>
#include "ec_local.h"
#include <openssl/objects.h>
static size_t crv_len = 0;
static EC_builtin_curve *curves = NULL;
/* sanity checks field_inv function pointer in EC_METHOD */
static int group_field_tests(const EC_GROUP *group, BN_CTX *ctx)
{
BIGNUM *a = NULL, *b = NULL, *c = NULL;
int ret = 0;
if (group->meth->field_inv == NULL || group->meth->field_mul == NULL)
return 1;
BN_CTX_start(ctx);
a = BN_CTX_get(ctx);
b = BN_CTX_get(ctx);
if (!TEST_ptr(c = BN_CTX_get(ctx))
/* 1/1 = 1 */
|| !TEST_true(group->meth->field_inv(group, b, BN_value_one(), ctx))
|| !TEST_true(BN_is_one(b))
/* (1/a)*a = 1 */
|| !TEST_true(BN_rand(a, BN_num_bits(group->field) - 1,
BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))
|| !TEST_true(group->meth->field_inv(group, b, a, ctx))
|| (group->meth->field_encode &&
!TEST_true(group->meth->field_encode(group, a, a, ctx)))
|| (group->meth->field_encode &&
!TEST_true(group->meth->field_encode(group, b, b, ctx)))
|| !TEST_true(group->meth->field_mul(group, c, a, b, ctx))
|| (group->meth->field_decode &&
!TEST_true(group->meth->field_decode(group, c, c, ctx)))
|| !TEST_true(BN_is_one(c)))
goto err;
/* 1/0 = error */
BN_zero(a);
if (!TEST_false(group->meth->field_inv(group, b, a, ctx))
|| !TEST_true(ERR_GET_LIB(ERR_peek_last_error()) == ERR_LIB_EC)
|| !TEST_true(ERR_GET_REASON(ERR_peek_last_error()) ==
EC_R_CANNOT_INVERT)
/* 1/p = error */
|| !TEST_false(group->meth->field_inv(group, b, group->field, ctx))
|| !TEST_true(ERR_GET_LIB(ERR_peek_last_error()) == ERR_LIB_EC)
|| !TEST_true(ERR_GET_REASON(ERR_peek_last_error()) ==
EC_R_CANNOT_INVERT))
goto err;
ERR_clear_error();
ret = 1;
err:
BN_CTX_end(ctx);
return ret;
}
/* wrapper for group_field_tests for explicit curve params and EC_METHOD */
static int field_tests(const EC_METHOD *meth, const unsigned char *params,
int len)
{
BN_CTX *ctx = NULL;
BIGNUM *p = NULL, *a = NULL, *b = NULL;
EC_GROUP *group = NULL;
int ret = 0;
if (!TEST_ptr(ctx = BN_CTX_new()))
return 0;
BN_CTX_start(ctx);
p = BN_CTX_get(ctx);
a = BN_CTX_get(ctx);
if (!TEST_ptr(b = BN_CTX_get(ctx))
|| !TEST_ptr(group = EC_GROUP_new(meth))
|| !TEST_true(BN_bin2bn(params, len, p))
|| !TEST_true(BN_bin2bn(params + len, len, a))
|| !TEST_true(BN_bin2bn(params + 2 * len, len, b))
|| !TEST_true(EC_GROUP_set_curve(group, p, a, b, ctx))
|| !group_field_tests(group, ctx))
goto err;
ret = 1;
err:
BN_CTX_end(ctx);
BN_CTX_free(ctx);
if (group != NULL)
EC_GROUP_free(group);
return ret;
}
/* NIST prime curve P-256 */
static const unsigned char params_p256[] = {
/* p */
0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
/* a */
0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC,
/* b */
0x5A, 0xC6, 0x35, 0xD8, 0xAA, 0x3A, 0x93, 0xE7, 0xB3, 0xEB, 0xBD, 0x55,
0x76, 0x98, 0x86, 0xBC, 0x65, 0x1D, 0x06, 0xB0, 0xCC, 0x53, 0xB0, 0xF6,
0x3B, 0xCE, 0x3C, 0x3E, 0x27, 0xD2, 0x60, 0x4B
};
#ifndef OPENSSL_NO_EC2M
/* NIST binary curve B-283 */
static const unsigned char params_b283[] = {
/* p */
0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0xA1,
/* a */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
/* b */
0x02, 0x7B, 0x68, 0x0A, 0xC8, 0xB8, 0x59, 0x6D, 0xA5, 0xA4, 0xAF, 0x8A,
0x19, 0xA0, 0x30, 0x3F, 0xCA, 0x97, 0xFD, 0x76, 0x45, 0x30, 0x9F, 0xA2,
0xA5, 0x81, 0x48, 0x5A, 0xF6, 0x26, 0x3E, 0x31, 0x3B, 0x79, 0xA2, 0xF5
};
#endif
/* test EC_GFp_simple_method directly */
static int field_tests_ecp_simple(void)
{
TEST_info("Testing EC_GFp_simple_method()\n");
return field_tests(EC_GFp_simple_method(), params_p256,
sizeof(params_p256) / 3);
}
/* test EC_GFp_mont_method directly */
static int field_tests_ecp_mont(void)
{
TEST_info("Testing EC_GFp_mont_method()\n");
return field_tests(EC_GFp_mont_method(), params_p256,
sizeof(params_p256) / 3);
}
#ifndef OPENSSL_NO_EC2M
/* test EC_GF2m_simple_method directly */
static int field_tests_ec2_simple(void)
{
TEST_info("Testing EC_GF2m_simple_method()\n");
return field_tests(EC_GF2m_simple_method(), params_b283,
sizeof(params_b283) / 3);
}
#endif
/* test default method for a named curve */
static int field_tests_default(int n)
{
BN_CTX *ctx = NULL;
EC_GROUP *group = NULL;
int nid = curves[n].nid;
int ret = 0;
TEST_info("Testing curve %s\n", OBJ_nid2sn(nid));
if (!TEST_ptr(group = EC_GROUP_new_by_curve_name(nid))
|| !TEST_ptr(ctx = BN_CTX_new())
|| !group_field_tests(group, ctx))
goto err;
ret = 1;
err:
if (group != NULL)
EC_GROUP_free(group);
if (ctx != NULL)
BN_CTX_free(ctx);
return ret;
}
#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
/*
* Tests a point known to cause an incorrect underflow in an old version of
* ecp_nist521.c
*/
static int underflow_test(void)
{
BN_CTX *ctx = NULL;
EC_GROUP *grp = NULL;
EC_POINT *P = NULL, *Q = NULL, *R = NULL;
BIGNUM *x1 = NULL, *y1 = NULL, *z1 = NULL, *x2 = NULL, *y2 = NULL;
BIGNUM *k = NULL;
int testresult = 0;
const char *x1str =
"1534f0077fffffe87e9adcfe000000000000000000003e05a21d2400002e031b1f4"
"b80000c6fafa4f3c1288798d624a247b5e2ffffffffffffffefe099241900004";
const char *p521m1 =
"1ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffe";
ctx = BN_CTX_new();
if (!TEST_ptr(ctx))
return 0;
BN_CTX_start(ctx);
x1 = BN_CTX_get(ctx);
y1 = BN_CTX_get(ctx);
z1 = BN_CTX_get(ctx);
x2 = BN_CTX_get(ctx);
y2 = BN_CTX_get(ctx);
k = BN_CTX_get(ctx);
if (!TEST_ptr(k))
goto err;
grp = EC_GROUP_new_by_curve_name(NID_secp521r1);
P = EC_POINT_new(grp);
Q = EC_POINT_new(grp);
R = EC_POINT_new(grp);
if (!TEST_ptr(grp) || !TEST_ptr(P) || !TEST_ptr(Q) || !TEST_ptr(R))
goto err;
if (!TEST_int_gt(BN_hex2bn(&x1, x1str), 0)
|| !TEST_int_gt(BN_hex2bn(&y1, p521m1), 0)
|| !TEST_int_gt(BN_hex2bn(&z1, p521m1), 0)
|| !TEST_int_gt(BN_hex2bn(&k, "02"), 0)
|| !TEST_true(ossl_ec_GFp_simple_set_Jprojective_coordinates_GFp(grp, P, x1,
y1, z1, ctx))
|| !TEST_true(EC_POINT_mul(grp, Q, NULL, P, k, ctx))
|| !TEST_true(EC_POINT_get_affine_coordinates(grp, Q, x1, y1, ctx))
|| !TEST_true(EC_POINT_dbl(grp, R, P, ctx))
|| !TEST_true(EC_POINT_get_affine_coordinates(grp, R, x2, y2, ctx)))
goto err;
if (!TEST_int_eq(BN_cmp(x1, x2), 0)
|| !TEST_int_eq(BN_cmp(y1, y2), 0))
goto err;
testresult = 1;
err:
BN_CTX_end(ctx);
EC_POINT_free(P);
EC_POINT_free(Q);
EC_POINT_free(R);
EC_GROUP_free(grp);
BN_CTX_free(ctx);
return testresult;
}
#endif
/*
* Tests behavior of the decoded_from_explicit_params flag and API
*/
static int decoded_flag_test(void)
{
EC_GROUP *grp;
EC_GROUP *grp_copy = NULL;
ECPARAMETERS *ecparams = NULL;
ECPKPARAMETERS *ecpkparams = NULL;
EC_KEY *key = NULL;
unsigned char *encodedparams = NULL;
const unsigned char *encp;
int encodedlen;
int testresult = 0;
/* Test EC_GROUP_new not setting the flag */
grp = EC_GROUP_new(EC_GFp_simple_method());
if (!TEST_ptr(grp)
|| !TEST_int_eq(grp->decoded_from_explicit_params, 0))
goto err;
EC_GROUP_free(grp);
/* Test EC_GROUP_new_by_curve_name not setting the flag */
grp = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1);
if (!TEST_ptr(grp)
|| !TEST_int_eq(grp->decoded_from_explicit_params, 0))
goto err;
/* Test EC_GROUP_new_from_ecparameters not setting the flag */
if (!TEST_ptr(ecparams = EC_GROUP_get_ecparameters(grp, NULL))
|| !TEST_ptr(grp_copy = EC_GROUP_new_from_ecparameters(ecparams))
|| !TEST_int_eq(grp_copy->decoded_from_explicit_params, 0))
goto err;
EC_GROUP_free(grp_copy);
grp_copy = NULL;
ECPARAMETERS_free(ecparams);
ecparams = NULL;
/* Test EC_GROUP_new_from_ecpkparameters not setting the flag */
if (!TEST_int_eq(EC_GROUP_get_asn1_flag(grp), OPENSSL_EC_NAMED_CURVE)
|| !TEST_ptr(ecpkparams = EC_GROUP_get_ecpkparameters(grp, NULL))
|| !TEST_ptr(grp_copy = EC_GROUP_new_from_ecpkparameters(ecpkparams))
|| !TEST_int_eq(grp_copy->decoded_from_explicit_params, 0)
|| !TEST_ptr(key = EC_KEY_new())
/* Test EC_KEY_decoded_from_explicit_params on key without a group */
|| !TEST_int_eq(EC_KEY_decoded_from_explicit_params(key), -1)
|| !TEST_int_eq(EC_KEY_set_group(key, grp_copy), 1)
/* Test EC_KEY_decoded_from_explicit_params negative case */
|| !TEST_int_eq(EC_KEY_decoded_from_explicit_params(key), 0))
goto err;
EC_GROUP_free(grp_copy);
grp_copy = NULL;
ECPKPARAMETERS_free(ecpkparams);
ecpkparams = NULL;
/* Test d2i_ECPKParameters with named params not setting the flag */
if (!TEST_int_gt(encodedlen = i2d_ECPKParameters(grp, &encodedparams), 0)
|| !TEST_ptr(encp = encodedparams)
|| !TEST_ptr(grp_copy = d2i_ECPKParameters(NULL, &encp, encodedlen))
|| !TEST_int_eq(grp_copy->decoded_from_explicit_params, 0))
goto err;
EC_GROUP_free(grp_copy);
grp_copy = NULL;
OPENSSL_free(encodedparams);
encodedparams = NULL;
/* Asn1 flag stays set to explicit with EC_GROUP_new_from_ecpkparameters */
EC_GROUP_set_asn1_flag(grp, OPENSSL_EC_EXPLICIT_CURVE);
if (!TEST_ptr(ecpkparams = EC_GROUP_get_ecpkparameters(grp, NULL))
|| !TEST_ptr(grp_copy = EC_GROUP_new_from_ecpkparameters(ecpkparams))
|| !TEST_int_eq(EC_GROUP_get_asn1_flag(grp_copy), OPENSSL_EC_EXPLICIT_CURVE)
|| !TEST_int_eq(grp_copy->decoded_from_explicit_params, 0))
goto err;
EC_GROUP_free(grp_copy);
grp_copy = NULL;
/* Test d2i_ECPKParameters with explicit params setting the flag */
if (!TEST_int_gt(encodedlen = i2d_ECPKParameters(grp, &encodedparams), 0)
|| !TEST_ptr(encp = encodedparams)
|| !TEST_ptr(grp_copy = d2i_ECPKParameters(NULL, &encp, encodedlen))
|| !TEST_int_eq(EC_GROUP_get_asn1_flag(grp_copy), OPENSSL_EC_EXPLICIT_CURVE)
|| !TEST_int_eq(grp_copy->decoded_from_explicit_params, 1)
|| !TEST_int_eq(EC_KEY_set_group(key, grp_copy), 1)
/* Test EC_KEY_decoded_from_explicit_params positive case */
|| !TEST_int_eq(EC_KEY_decoded_from_explicit_params(key), 1))
goto err;
testresult = 1;
err:
EC_KEY_free(key);
EC_GROUP_free(grp);
EC_GROUP_free(grp_copy);
ECPARAMETERS_free(ecparams);
ECPKPARAMETERS_free(ecpkparams);
OPENSSL_free(encodedparams);
return testresult;
}
static
int ecpkparams_i2d2i_test(int n)
{
EC_GROUP *g1 = NULL, *g2 = NULL;
FILE *fp = NULL;
int nid = curves[n].nid;
int testresult = 0;
/* create group */
if (!TEST_ptr(g1 = EC_GROUP_new_by_curve_name(nid)))
goto end;
/* encode params to file */
if (!TEST_ptr(fp = fopen("params.der", "wb"))
|| !TEST_true(i2d_ECPKParameters_fp(fp, g1)))
goto end;
/* flush and close file */
if (!TEST_int_eq(fclose(fp), 0)) {
fp = NULL;
goto end;
}
fp = NULL;
/* decode params from file */
if (!TEST_ptr(fp = fopen("params.der", "rb"))
|| !TEST_ptr(g2 = d2i_ECPKParameters_fp(fp, NULL)))
goto end;
testresult = 1; /* PASS */
end:
if (fp != NULL)
fclose(fp);
EC_GROUP_free(g1);
EC_GROUP_free(g2);
return testresult;
}
int setup_tests(void)
{
crv_len = EC_get_builtin_curves(NULL, 0);
if (!TEST_ptr(curves = OPENSSL_malloc(sizeof(*curves) * crv_len))
|| !TEST_true(EC_get_builtin_curves(curves, crv_len)))
return 0;
ADD_TEST(field_tests_ecp_simple);
ADD_TEST(field_tests_ecp_mont);
#ifndef OPENSSL_NO_EC2M
ADD_TEST(field_tests_ec2_simple);
#endif
ADD_ALL_TESTS(field_tests_default, crv_len);
#ifndef OPENSSL_NO_EC_NISTP_64_GCC_128
ADD_TEST(underflow_test);
#endif
ADD_TEST(decoded_flag_test);
ADD_ALL_TESTS(ecpkparams_i2d2i_test, crv_len);
return 1;
}
void cleanup_tests(void)
{
OPENSSL_free(curves);
}