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12fb8c3d | 1 | /* |
4333b89f | 2 | * Copyright 2011-2021 The OpenSSL Project Authors. All Rights Reserved. |
12fb8c3d | 3 | * |
909f1a2e | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
12fb8c3d RS |
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 | ||
0a89ae97 P |
10 | /* We need to use some deprecated APIs */ |
11 | #define OPENSSL_SUPPRESS_DEPRECATED | |
12 | ||
12fb8c3d | 13 | #include <string.h> |
176db6dc | 14 | #include "internal/nelem.h" |
12fb8c3d RS |
15 | #include <openssl/crypto.h> |
16 | #include <openssl/err.h> | |
17 | #include <openssl/rand.h> | |
18 | #include <openssl/obj_mac.h> | |
19 | #include <openssl/evp.h> | |
20 | #include <openssl/aes.h> | |
706457b7 | 21 | #include "../crypto/rand/rand_local.h" |
25f2138b | 22 | #include "../include/crypto/rand.h" |
924663c3 | 23 | #include "../include/crypto/evp.h" |
3f078163 P |
24 | #include "../providers/implementations/rands/drbg_local.h" |
25 | #include "../crypto/evp/evp_local.h" | |
12fb8c3d | 26 | |
440bce8f KR |
27 | #if defined(_WIN32) |
28 | # include <windows.h> | |
29 | #endif | |
30 | ||
08073700 RB |
31 | #if defined(__TANDEM) |
32 | # if defined(OPENSSL_TANDEM_FLOSS) | |
33 | # include <floss.h(floss_fork)> | |
34 | # endif | |
35 | #endif | |
84952925 DMSP |
36 | |
37 | #if defined(OPENSSL_SYS_UNIX) | |
38 | # include <sys/types.h> | |
39 | # include <sys/wait.h> | |
40 | # include <unistd.h> | |
41 | #endif | |
42 | ||
12fb8c3d | 43 | #include "testutil.h" |
12fb8c3d | 44 | |
7d615e21 P |
45 | /* |
46 | * DRBG generate wrappers | |
47 | */ | |
48 | static int gen_bytes(EVP_RAND_CTX *drbg, unsigned char *buf, int num) | |
49 | { | |
d994ce12 | 50 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
7d615e21 | 51 | const RAND_METHOD *meth = RAND_get_rand_method(); |
12fb8c3d | 52 | |
7d615e21 P |
53 | if (meth != NULL && meth != RAND_OpenSSL()) { |
54 | if (meth->bytes != NULL) | |
55 | return meth->bytes(buf, num); | |
56 | return -1; | |
57 | } | |
d994ce12 | 58 | #endif |
8164d91d | 59 | |
7d615e21 P |
60 | if (drbg != NULL) |
61 | return EVP_RAND_generate(drbg, buf, num, 0, 0, NULL, 0); | |
62 | return 0; | |
63 | } | |
12fb8c3d | 64 | |
7d615e21 P |
65 | static int rand_bytes(unsigned char *buf, int num) |
66 | { | |
67 | return gen_bytes(RAND_get0_public(NULL), buf, num); | |
68 | } | |
8bf36651 | 69 | |
7d615e21 P |
70 | static int rand_priv_bytes(unsigned char *buf, int num) |
71 | { | |
72 | return gen_bytes(RAND_get0_private(NULL), buf, num); | |
73 | } | |
12fb8c3d | 74 | |
09e76c5d DMSP |
75 | |
76 | /* size of random output generated in test_drbg_reseed() */ | |
77 | #define RANDOM_SIZE 16 | |
78 | ||
3f078163 P |
79 | /* |
80 | * DRBG query functions | |
81 | */ | |
7d615e21 | 82 | static int state(EVP_RAND_CTX *drbg) |
3f078163 | 83 | { |
7d615e21 | 84 | return EVP_RAND_state(drbg); |
3f078163 P |
85 | } |
86 | ||
7d615e21 | 87 | static unsigned int query_rand_uint(EVP_RAND_CTX *drbg, const char *name) |
3f078163 P |
88 | { |
89 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
90 | unsigned int n; | |
91 | ||
92 | *params = OSSL_PARAM_construct_uint(name, &n); | |
e494fac7 | 93 | if (EVP_RAND_CTX_get_params(drbg, params)) |
3f078163 P |
94 | return n; |
95 | return 0; | |
96 | } | |
97 | ||
3f078163 | 98 | #define DRBG_UINT(name) \ |
7d615e21 | 99 | static unsigned int name(EVP_RAND_CTX *drbg) \ |
3f078163 P |
100 | { \ |
101 | return query_rand_uint(drbg, #name); \ | |
102 | } | |
3f078163 P |
103 | DRBG_UINT(reseed_counter) |
104 | ||
7d615e21 | 105 | static PROV_DRBG *prov_rand(EVP_RAND_CTX *drbg) |
d1768e82 | 106 | { |
7c14d0c1 | 107 | return (PROV_DRBG *)drbg->algctx; |
d1768e82 DMSP |
108 | } |
109 | ||
7d615e21 | 110 | static void set_reseed_counter(EVP_RAND_CTX *drbg, unsigned int n) |
3f078163 P |
111 | { |
112 | PROV_DRBG *p = prov_rand(drbg); | |
113 | ||
114 | p->reseed_counter = n; | |
115 | } | |
116 | ||
7d615e21 | 117 | static void inc_reseed_counter(EVP_RAND_CTX *drbg) |
3f078163 P |
118 | { |
119 | set_reseed_counter(drbg, reseed_counter(drbg) + 1); | |
120 | } | |
121 | ||
7d615e21 | 122 | static time_t reseed_time(EVP_RAND_CTX *drbg) |
3f078163 P |
123 | { |
124 | OSSL_PARAM params[2] = { OSSL_PARAM_END, OSSL_PARAM_END }; | |
125 | time_t t; | |
126 | ||
127 | *params = OSSL_PARAM_construct_time_t(OSSL_DRBG_PARAM_RESEED_TIME, &t); | |
e494fac7 | 128 | if (EVP_RAND_CTX_get_params(drbg, params)) |
3f078163 P |
129 | return t; |
130 | return 0; | |
131 | } | |
132 | ||
3f078163 P |
133 | /* |
134 | * When building the FIPS module, it isn't possible to disable the continuous | |
135 | * RNG tests. Tests that require this are skipped. | |
136 | */ | |
137 | static int crngt_skip(void) | |
138 | { | |
139 | #ifdef FIPS_MODULE | |
140 | return 1; | |
141 | #else | |
142 | return 0; | |
143 | #endif | |
144 | } | |
145 | ||
d69226a3 P |
146 | /* |
147 | * Disable CRNG testing if it is enabled. | |
3f078163 P |
148 | * This stub remains to indicate the calling locations where it is necessary. |
149 | * Once the RNG infrastructure is able to disable these tests, it should be | |
150 | * reconstituted. | |
d69226a3 | 151 | */ |
7d615e21 | 152 | static int disable_crngt(EVP_RAND_CTX *drbg) |
12fb8c3d | 153 | { |
12fb8c3d RS |
154 | return 1; |
155 | } | |
156 | ||
157 | /* | |
7d615e21 | 158 | * Generates random output using rand_bytes() and rand_priv_bytes() |
a93ba405 DMSP |
159 | * and checks whether the three shared DRBGs were reseeded as |
160 | * expected. | |
161 | * | |
162 | * |expect_success|: expected outcome (as reported by RAND_status()) | |
ce3080e9 | 163 | * |primary|, |public|, |private|: pointers to the three shared DRBGs |
09e76c5d | 164 | * |public_random|, |private_random|: generated random output |
a93ba405 DMSP |
165 | * |expect_xxx_reseed| = |
166 | * 1: it is expected that the specified DRBG is reseeded | |
167 | * 0: it is expected that the specified DRBG is not reseeded | |
168 | * -1: don't check whether the specified DRBG was reseeded or not | |
09e76c5d | 169 | * |reseed_when|: if nonzero, used instead of time(NULL) to set the |
2bb1b5dd | 170 | * |before_reseed| time. |
a93ba405 DMSP |
171 | */ |
172 | static int test_drbg_reseed(int expect_success, | |
7d615e21 P |
173 | EVP_RAND_CTX *primary, |
174 | EVP_RAND_CTX *public, | |
175 | EVP_RAND_CTX *private, | |
09e76c5d DMSP |
176 | unsigned char *public_random, |
177 | unsigned char *private_random, | |
ce3080e9 | 178 | int expect_primary_reseed, |
a93ba405 | 179 | int expect_public_reseed, |
2bb1b5dd | 180 | int expect_private_reseed, |
3f078163 | 181 | time_t reseed_when |
a93ba405 DMSP |
182 | ) |
183 | { | |
08a65d96 | 184 | time_t before_reseed, after_reseed; |
a93ba405 | 185 | int expected_state = (expect_success ? DRBG_READY : DRBG_ERROR); |
ce3080e9 | 186 | unsigned int primary_reseed, public_reseed, private_reseed; |
09e76c5d DMSP |
187 | unsigned char dummy[RANDOM_SIZE]; |
188 | ||
189 | if (public_random == NULL) | |
190 | public_random = dummy; | |
191 | ||
192 | if (private_random == NULL) | |
193 | private_random = dummy; | |
a93ba405 DMSP |
194 | |
195 | /* | |
196 | * step 1: check preconditions | |
197 | */ | |
198 | ||
199 | /* Test whether seed propagation is enabled */ | |
ce3080e9 | 200 | if (!TEST_int_ne(primary_reseed = reseed_counter(primary), 0) |
3f078163 P |
201 | || !TEST_int_ne(public_reseed = reseed_counter(public), 0) |
202 | || !TEST_int_ne(private_reseed = reseed_counter(private), 0)) | |
a93ba405 DMSP |
203 | return 0; |
204 | ||
205 | /* | |
206 | * step 2: generate random output | |
207 | */ | |
208 | ||
3f078163 P |
209 | if (reseed_when == 0) |
210 | reseed_when = time(NULL); | |
2bb1b5dd | 211 | |
a93ba405 | 212 | /* Generate random output from the public and private DRBG */ |
ce3080e9 | 213 | before_reseed = expect_primary_reseed == 1 ? reseed_when : 0; |
09e76c5d DMSP |
214 | if (!TEST_int_eq(rand_bytes((unsigned char*)public_random, |
215 | RANDOM_SIZE), expect_success) | |
216 | || !TEST_int_eq(rand_priv_bytes((unsigned char*) private_random, | |
217 | RANDOM_SIZE), expect_success)) | |
a93ba405 | 218 | return 0; |
08a65d96 | 219 | after_reseed = time(NULL); |
a93ba405 DMSP |
220 | |
221 | ||
222 | /* | |
223 | * step 3: check postconditions | |
224 | */ | |
75e2c877 | 225 | |
a93ba405 | 226 | /* Test whether reseeding succeeded as expected */ |
7d615e21 P |
227 | if (!TEST_int_eq(state(primary), expected_state) |
228 | || !TEST_int_eq(state(public), expected_state) | |
3f078163 | 229 | || !TEST_int_eq(state(private), expected_state)) |
75e2c877 | 230 | return 0; |
a93ba405 | 231 | |
ce3080e9 P |
232 | if (expect_primary_reseed >= 0) { |
233 | /* Test whether primary DRBG was reseeded as expected */ | |
234 | if (!TEST_int_ge(reseed_counter(primary), primary_reseed)) | |
a93ba405 DMSP |
235 | return 0; |
236 | } | |
237 | ||
238 | if (expect_public_reseed >= 0) { | |
239 | /* Test whether public DRBG was reseeded as expected */ | |
3f078163 P |
240 | if (!TEST_int_ge(reseed_counter(public), public_reseed) |
241 | || !TEST_uint_ge(reseed_counter(public), | |
ce3080e9 | 242 | reseed_counter(primary))) |
a93ba405 DMSP |
243 | return 0; |
244 | } | |
245 | ||
246 | if (expect_private_reseed >= 0) { | |
247 | /* Test whether public DRBG was reseeded as expected */ | |
3f078163 P |
248 | if (!TEST_int_ge(reseed_counter(private), private_reseed) |
249 | || !TEST_uint_ge(reseed_counter(private), | |
ce3080e9 | 250 | reseed_counter(primary))) |
a93ba405 DMSP |
251 | return 0; |
252 | } | |
253 | ||
254 | if (expect_success == 1) { | |
ce3080e9 P |
255 | /* Test whether reseed time of primary DRBG is set correctly */ |
256 | if (!TEST_time_t_le(before_reseed, reseed_time(primary)) | |
257 | || !TEST_time_t_le(reseed_time(primary), after_reseed)) | |
08a65d96 DMSP |
258 | return 0; |
259 | ||
ce3080e9 P |
260 | /* Test whether reseed times of child DRBGs are synchronized with primary */ |
261 | if (!TEST_time_t_ge(reseed_time(public), reseed_time(primary)) | |
262 | || !TEST_time_t_ge(reseed_time(private), reseed_time(primary))) | |
08a65d96 | 263 | return 0; |
a93ba405 DMSP |
264 | } else { |
265 | ERR_clear_error(); | |
266 | } | |
267 | ||
75e2c877 RS |
268 | return 1; |
269 | } | |
270 | ||
84952925 DMSP |
271 | |
272 | #if defined(OPENSSL_SYS_UNIX) | |
09e76c5d DMSP |
273 | /* number of children to fork */ |
274 | #define DRBG_FORK_COUNT 9 | |
275 | /* two results per child, two for the parent */ | |
276 | #define DRBG_FORK_RESULT_COUNT (2 * (DRBG_FORK_COUNT + 1)) | |
277 | ||
278 | typedef struct drbg_fork_result_st { | |
279 | ||
280 | unsigned char random[RANDOM_SIZE]; /* random output */ | |
281 | ||
282 | int pindex; /* process index (0: parent, 1,2,3...: children)*/ | |
283 | pid_t pid; /* process id */ | |
284 | int private; /* true if the private drbg was used */ | |
285 | char name[10]; /* 'parent' resp. 'child 1', 'child 2', ... */ | |
286 | } drbg_fork_result; | |
287 | ||
84952925 | 288 | /* |
09e76c5d DMSP |
289 | * Sort the drbg_fork_result entries in lexicographical order |
290 | * | |
291 | * This simplifies finding duplicate random output and makes | |
292 | * the printout in case of an error more readable. | |
84952925 | 293 | */ |
09e76c5d | 294 | static int compare_drbg_fork_result(const void * left, const void * right) |
84952925 | 295 | { |
09e76c5d DMSP |
296 | int result; |
297 | const drbg_fork_result *l = left; | |
298 | const drbg_fork_result *r = right; | |
299 | ||
300 | /* separate public and private results */ | |
301 | result = l->private - r->private; | |
302 | ||
303 | if (result == 0) | |
304 | result = memcmp(l->random, r->random, RANDOM_SIZE); | |
305 | ||
306 | if (result == 0) | |
307 | result = l->pindex - r->pindex; | |
308 | ||
309 | return result; | |
310 | } | |
311 | ||
312 | /* | |
313 | * Sort two-byte chunks of random data | |
314 | * | |
315 | * Used for finding collisions in two-byte chunks | |
316 | */ | |
317 | static int compare_rand_chunk(const void * left, const void * right) | |
318 | { | |
319 | return memcmp(left, right, 2); | |
320 | } | |
321 | ||
322 | /* | |
323 | * Test whether primary, public and private DRBG are reseeded | |
324 | * in the child after forking the process. Collect the random | |
325 | * output of the public and private DRBG and send it back to | |
326 | * the parent process. | |
327 | */ | |
328 | static int test_drbg_reseed_in_child(EVP_RAND_CTX *primary, | |
329 | EVP_RAND_CTX *public, | |
330 | EVP_RAND_CTX *private, | |
331 | drbg_fork_result result[2]) | |
332 | { | |
333 | int rv = 0, status; | |
334 | int fd[2]; | |
84952925 | 335 | pid_t pid; |
09e76c5d DMSP |
336 | unsigned char random[2 * RANDOM_SIZE]; |
337 | ||
338 | if (!TEST_int_ge(pipe(fd), 0)) | |
339 | return 0; | |
84952925 | 340 | |
09e76c5d DMSP |
341 | if (!TEST_int_ge(pid = fork(), 0)) { |
342 | close(fd[0]); | |
343 | close(fd[1]); | |
84952925 | 344 | return 0; |
09e76c5d DMSP |
345 | } else if (pid > 0) { |
346 | ||
347 | /* I'm the parent; close the write end */ | |
348 | close(fd[1]); | |
349 | ||
350 | /* wait for children to terminate and collect their random output */ | |
351 | if (TEST_int_eq(waitpid(pid, &status, 0), pid) | |
352 | && TEST_int_eq(status, 0) | |
353 | && TEST_true(read(fd[0], &random[0], sizeof(random)) | |
354 | == sizeof(random))) { | |
355 | ||
356 | /* random output of public drbg */ | |
357 | result[0].pid = pid; | |
358 | result[0].private = 0; | |
359 | memcpy(result[0].random, &random[0], RANDOM_SIZE); | |
360 | ||
361 | /* random output of private drbg */ | |
362 | result[1].pid = pid; | |
363 | result[1].private = 1; | |
364 | memcpy(result[1].random, &random[RANDOM_SIZE], RANDOM_SIZE); | |
365 | ||
366 | rv = 1; | |
367 | } | |
368 | ||
369 | /* close the read end */ | |
370 | close(fd[0]); | |
371 | ||
372 | return rv; | |
373 | ||
374 | } else { | |
375 | ||
376 | /* I'm the child; close the read end */ | |
377 | close(fd[0]); | |
378 | ||
379 | /* check whether all three DRBGs reseed and send output to parent */ | |
380 | if (TEST_true(test_drbg_reseed(1, primary, public, private, | |
381 | &random[0], &random[RANDOM_SIZE], | |
382 | 1, 1, 1, 0)) | |
383 | && TEST_true(write(fd[1], random, sizeof(random)) | |
384 | == sizeof(random))) { | |
385 | ||
386 | rv = 1; | |
387 | } | |
388 | ||
389 | /* close the write end */ | |
390 | close(fd[1]); | |
391 | ||
392 | /* convert boolean to exit code */ | |
393 | exit(rv == 0); | |
394 | } | |
395 | } | |
396 | ||
397 | static int test_rand_reseed_on_fork(EVP_RAND_CTX *primary, | |
398 | EVP_RAND_CTX *public, | |
399 | EVP_RAND_CTX *private) | |
400 | { | |
401 | unsigned int i; | |
402 | pid_t pid = getpid(); | |
403 | int verbose = (getenv("V") != NULL); | |
404 | int success = 1; | |
405 | int duplicate[2] = {0, 0}; | |
406 | unsigned char random[2 * RANDOM_SIZE]; | |
407 | unsigned char sample[DRBG_FORK_RESULT_COUNT * RANDOM_SIZE]; | |
408 | unsigned char *psample = &sample[0]; | |
409 | drbg_fork_result result[DRBG_FORK_RESULT_COUNT]; | |
410 | drbg_fork_result *presult = &result[2]; | |
411 | ||
412 | memset(&result, 0, sizeof(result)); | |
413 | ||
414 | for (i = 1 ; i <= DRBG_FORK_COUNT ; ++i) { | |
415 | ||
416 | presult[0].pindex = presult[1].pindex = i; | |
417 | ||
418 | sprintf(presult[0].name, "child %d", i); | |
419 | strcpy(presult[1].name, presult[0].name); | |
420 | ||
421 | /* collect the random output of the children */ | |
422 | if (!TEST_true(test_drbg_reseed_in_child(primary, | |
423 | public, | |
424 | private, | |
425 | presult))) | |
426 | return 0; | |
84952925 | 427 | |
09e76c5d | 428 | presult += 2; |
84952925 DMSP |
429 | } |
430 | ||
09e76c5d DMSP |
431 | /* collect the random output of the parent */ |
432 | if (!TEST_true(test_drbg_reseed(1, | |
433 | primary, public, private, | |
434 | &random[0], &random[RANDOM_SIZE], | |
435 | 0, 0, 0, 0))) | |
436 | return 0; | |
437 | ||
438 | strcpy(result[0].name, "parent"); | |
439 | strcpy(result[1].name, "parent"); | |
440 | ||
441 | /* output of public drbg */ | |
442 | result[0].pid = pid; | |
443 | result[0].private = 0; | |
444 | memcpy(result[0].random, &random[0], RANDOM_SIZE); | |
445 | ||
446 | /* output of private drbg */ | |
447 | result[1].pid = pid; | |
448 | result[1].private = 1; | |
449 | memcpy(result[1].random, &random[RANDOM_SIZE], RANDOM_SIZE); | |
450 | ||
451 | /* collect all sampled random data in a single buffer */ | |
452 | for (i = 0 ; i < DRBG_FORK_RESULT_COUNT ; ++i) { | |
453 | memcpy(psample, &result[i].random[0], RANDOM_SIZE); | |
454 | psample += RANDOM_SIZE; | |
455 | } | |
456 | ||
457 | /* sort the results... */ | |
458 | qsort(result, DRBG_FORK_RESULT_COUNT, sizeof(drbg_fork_result), | |
459 | compare_drbg_fork_result); | |
460 | ||
461 | /* ...and count duplicate prefixes by looking at the first byte only */ | |
462 | for (i = 1 ; i < DRBG_FORK_RESULT_COUNT ; ++i) { | |
463 | if (result[i].random[0] == result[i-1].random[0]) { | |
464 | /* count public and private duplicates separately */ | |
465 | ++duplicate[result[i].private]; | |
466 | } | |
467 | } | |
468 | ||
469 | if (duplicate[0] >= DRBG_FORK_COUNT - 1) { | |
470 | /* just too many duplicates to be a coincidence */ | |
471 | TEST_note("ERROR: %d duplicate prefixes in public random output", duplicate[0]); | |
472 | success = 0; | |
473 | } | |
474 | ||
475 | if (duplicate[1] >= DRBG_FORK_COUNT - 1) { | |
476 | /* just too many duplicates to be a coincidence */ | |
477 | TEST_note("ERROR: %d duplicate prefixes in private random output", duplicate[1]); | |
478 | success = 0; | |
479 | } | |
480 | ||
481 | duplicate[0] = 0; | |
482 | ||
483 | /* sort the two-byte chunks... */ | |
484 | qsort(sample, sizeof(sample)/2, 2, compare_rand_chunk); | |
485 | ||
486 | /* ...and count duplicate chunks */ | |
487 | for (i = 2, psample = sample + 2 ; i < sizeof(sample) ; i += 2, psample += 2) { | |
488 | if (compare_rand_chunk(psample - 2, psample) == 0) | |
489 | ++duplicate[0]; | |
490 | } | |
491 | ||
492 | if (duplicate[0] >= DRBG_FORK_COUNT - 1) { | |
493 | /* just too many duplicates to be a coincidence */ | |
494 | TEST_note("ERROR: %d duplicate chunks in random output", duplicate[0]); | |
495 | success = 0; | |
496 | } | |
497 | ||
498 | if (verbose || !success) { | |
499 | ||
500 | for (i = 0 ; i < DRBG_FORK_RESULT_COUNT ; ++i) { | |
501 | char *rand_hex = OPENSSL_buf2hexstr(result[i].random, RANDOM_SIZE); | |
502 | ||
503 | TEST_note(" random: %s, pid: %d (%s, %s)", | |
504 | rand_hex, | |
505 | result[i].pid, | |
506 | result[i].name, | |
507 | result[i].private ? "private" : "public" | |
508 | ); | |
509 | ||
510 | OPENSSL_free(rand_hex); | |
511 | } | |
512 | } | |
513 | ||
514 | return success; | |
515 | } | |
516 | ||
517 | static int test_rand_fork_safety(int i) | |
518 | { | |
519 | int success = 1; | |
520 | unsigned char random[1]; | |
521 | EVP_RAND_CTX *primary, *public, *private; | |
522 | ||
523 | /* All three DRBGs should be non-null */ | |
524 | if (!TEST_ptr(primary = RAND_get0_primary(NULL)) | |
525 | || !TEST_ptr(public = RAND_get0_public(NULL)) | |
526 | || !TEST_ptr(private = RAND_get0_private(NULL))) | |
527 | return 0; | |
528 | ||
529 | /* run the actual test */ | |
530 | if (!TEST_true(test_rand_reseed_on_fork(primary, public, private))) | |
531 | success = 0; | |
532 | ||
533 | /* request a single byte from each of the DRBGs before the next run */ | |
534 | if (!TEST_true(RAND_bytes(random, 1) && RAND_priv_bytes(random, 1))) | |
535 | success = 0; | |
536 | ||
537 | return success; | |
84952925 DMSP |
538 | } |
539 | #endif | |
540 | ||
a93ba405 DMSP |
541 | /* |
542 | * Test whether the default rand_method (RAND_OpenSSL()) is | |
543 | * setup correctly, in particular whether reseeding works | |
544 | * as designed. | |
545 | */ | |
09e76c5d | 546 | static int test_rand_reseed(void) |
a93ba405 | 547 | { |
7d615e21 | 548 | EVP_RAND_CTX *primary, *public, *private; |
a93ba405 | 549 | unsigned char rand_add_buf[256]; |
3f078163 | 550 | int rv = 0; |
2bb1b5dd | 551 | time_t before_reseed; |
a93ba405 | 552 | |
3f078163 P |
553 | if (crngt_skip()) |
554 | return TEST_skip("CRNGT cannot be disabled"); | |
555 | ||
d994ce12 | 556 | #ifndef OPENSSL_NO_DEPRECATED_3_0 |
a93ba405 DMSP |
557 | /* Check whether RAND_OpenSSL() is the default method */ |
558 | if (!TEST_ptr_eq(RAND_get_rand_method(), RAND_OpenSSL())) | |
559 | return 0; | |
d994ce12 | 560 | #endif |
a93ba405 DMSP |
561 | |
562 | /* All three DRBGs should be non-null */ | |
7d615e21 P |
563 | if (!TEST_ptr(primary = RAND_get0_primary(NULL)) |
564 | || !TEST_ptr(public = RAND_get0_public(NULL)) | |
565 | || !TEST_ptr(private = RAND_get0_private(NULL))) | |
a93ba405 DMSP |
566 | return 0; |
567 | ||
ce3080e9 | 568 | /* There should be three distinct DRBGs, two of them chained to primary */ |
a93ba405 | 569 | if (!TEST_ptr_ne(public, private) |
ce3080e9 P |
570 | || !TEST_ptr_ne(public, primary) |
571 | || !TEST_ptr_ne(private, primary) | |
7d615e21 P |
572 | || !TEST_ptr_eq(prov_rand(public)->parent, prov_rand(primary)) |
573 | || !TEST_ptr_eq(prov_rand(private)->parent, prov_rand(primary))) | |
a93ba405 DMSP |
574 | return 0; |
575 | ||
ce3080e9 P |
576 | /* Disable CRNG testing for the primary DRBG */ |
577 | if (!TEST_true(disable_crngt(primary))) | |
d69226a3 P |
578 | return 0; |
579 | ||
59f124f9 | 580 | /* uninstantiate the three global DRBGs */ |
7d615e21 P |
581 | EVP_RAND_uninstantiate(primary); |
582 | EVP_RAND_uninstantiate(private); | |
583 | EVP_RAND_uninstantiate(public); | |
a93ba405 | 584 | |
59f124f9 DMSP |
585 | |
586 | /* | |
587 | * Test initial seeding of shared DRBGs | |
588 | */ | |
09e76c5d DMSP |
589 | if (!TEST_true(test_drbg_reseed(1, |
590 | primary, public, private, | |
591 | NULL, NULL, | |
592 | 1, 1, 1, 0))) | |
59f124f9 | 593 | goto error; |
59f124f9 DMSP |
594 | |
595 | ||
a93ba405 | 596 | /* |
59f124f9 | 597 | * Test initial state of shared DRBGs |
a93ba405 | 598 | */ |
09e76c5d DMSP |
599 | if (!TEST_true(test_drbg_reseed(1, |
600 | primary, public, private, | |
601 | NULL, NULL, | |
602 | 0, 0, 0, 0))) | |
a93ba405 | 603 | goto error; |
a93ba405 DMSP |
604 | |
605 | /* | |
606 | * Test whether the public and private DRBG are both reseeded when their | |
ce3080e9 | 607 | * reseed counters differ from the primary's reseed counter. |
a93ba405 | 608 | */ |
ce3080e9 | 609 | inc_reseed_counter(primary); |
09e76c5d DMSP |
610 | if (!TEST_true(test_drbg_reseed(1, |
611 | primary, public, private, | |
612 | NULL, NULL, | |
613 | 0, 1, 1, 0))) | |
a93ba405 | 614 | goto error; |
a93ba405 DMSP |
615 | |
616 | /* | |
617 | * Test whether the public DRBG is reseeded when its reseed counter differs | |
ce3080e9 | 618 | * from the primary's reseed counter. |
a93ba405 | 619 | */ |
ce3080e9 | 620 | inc_reseed_counter(primary); |
3f078163 | 621 | inc_reseed_counter(private); |
09e76c5d DMSP |
622 | if (!TEST_true(test_drbg_reseed(1, |
623 | primary, public, private, | |
624 | NULL, NULL, | |
625 | 0, 1, 0, 0))) | |
a93ba405 | 626 | goto error; |
a93ba405 DMSP |
627 | |
628 | /* | |
629 | * Test whether the private DRBG is reseeded when its reseed counter differs | |
ce3080e9 | 630 | * from the primary's reseed counter. |
a93ba405 | 631 | */ |
ce3080e9 | 632 | inc_reseed_counter(primary); |
3f078163 | 633 | inc_reseed_counter(public); |
09e76c5d DMSP |
634 | if (!TEST_true(test_drbg_reseed(1, |
635 | primary, public, private, | |
636 | NULL, NULL, | |
637 | 0, 0, 1, 0))) | |
a93ba405 | 638 | goto error; |
a93ba405 | 639 | |
a93ba405 DMSP |
640 | /* fill 'randomness' buffer with some arbitrary data */ |
641 | memset(rand_add_buf, 'r', sizeof(rand_add_buf)); | |
642 | ||
f844f9eb | 643 | #ifndef FIPS_MODULE |
a93ba405 | 644 | /* |
2bb1b5dd BE |
645 | * Test whether all three DRBGs are reseeded by RAND_add(). |
646 | * The before_reseed time has to be measured here and passed into the | |
ce3080e9 | 647 | * test_drbg_reseed() test, because the primary DRBG gets already reseeded |
2bb1b5dd | 648 | * in RAND_add(), whence the check for the condition |
ce3080e9 | 649 | * before_reseed <= reseed_time(primary) will fail if the time value happens |
2bb1b5dd | 650 | * to increase between the RAND_add() and the test_drbg_reseed() call. |
a93ba405 | 651 | */ |
2bb1b5dd | 652 | before_reseed = time(NULL); |
a93ba405 | 653 | RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf)); |
09e76c5d DMSP |
654 | if (!TEST_true(test_drbg_reseed(1, |
655 | primary, public, private, | |
656 | NULL, NULL, | |
657 | 1, 1, 1, | |
2bb1b5dd | 658 | before_reseed))) |
a93ba405 | 659 | goto error; |
f844f9eb | 660 | #else /* FIPS_MODULE */ |
3a50a8a9 DMSP |
661 | /* |
662 | * In FIPS mode, random data provided by the application via RAND_add() | |
663 | * is not considered a trusted entropy source. It is only treated as | |
664 | * additional_data and no reseeding is forced. This test assures that | |
665 | * no reseeding occurs. | |
666 | */ | |
667 | before_reseed = time(NULL); | |
668 | RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf)); | |
09e76c5d DMSP |
669 | if (!TEST_true(test_drbg_reseed(1, |
670 | primary, public, private, | |
671 | NULL, NULL, | |
672 | 0, 0, 0, | |
3a50a8a9 DMSP |
673 | before_reseed))) |
674 | goto error; | |
3a50a8a9 | 675 | #endif |
a93ba405 DMSP |
676 | |
677 | rv = 1; | |
678 | ||
679 | error: | |
3f078163 | 680 | return rv; |
a93ba405 DMSP |
681 | } |
682 | ||
440bce8f | 683 | #if defined(OPENSSL_THREADS) |
43687d68 DMSP |
684 | static int multi_thread_rand_bytes_succeeded = 1; |
685 | static int multi_thread_rand_priv_bytes_succeeded = 1; | |
440bce8f | 686 | |
7d615e21 P |
687 | static int set_reseed_time_interval(EVP_RAND_CTX *drbg, int t) |
688 | { | |
689 | OSSL_PARAM params[2]; | |
690 | ||
691 | params[0] = OSSL_PARAM_construct_int(OSSL_DRBG_PARAM_RESEED_TIME_INTERVAL, | |
692 | &t); | |
693 | params[1] = OSSL_PARAM_construct_end(); | |
e494fac7 | 694 | return EVP_RAND_CTX_set_params(drbg, params); |
7d615e21 P |
695 | } |
696 | ||
440bce8f KR |
697 | static void run_multi_thread_test(void) |
698 | { | |
699 | unsigned char buf[256]; | |
700 | time_t start = time(NULL); | |
7d615e21 | 701 | EVP_RAND_CTX *public = NULL, *private = NULL; |
440bce8f | 702 | |
7d615e21 P |
703 | if (!TEST_ptr(public = RAND_get0_public(NULL)) |
704 | || !TEST_ptr(private = RAND_get0_private(NULL)) | |
705 | || !TEST_true(set_reseed_time_interval(private, 1)) | |
706 | || !TEST_true(set_reseed_time_interval(public, 1))) { | |
7ecd6c51 BE |
707 | multi_thread_rand_bytes_succeeded = 0; |
708 | return; | |
709 | } | |
440bce8f KR |
710 | |
711 | do { | |
7d615e21 | 712 | if (rand_bytes(buf, sizeof(buf)) <= 0) |
43687d68 | 713 | multi_thread_rand_bytes_succeeded = 0; |
7d615e21 | 714 | if (rand_priv_bytes(buf, sizeof(buf)) <= 0) |
43687d68 | 715 | multi_thread_rand_priv_bytes_succeeded = 0; |
440bce8f | 716 | } |
7d615e21 | 717 | while (time(NULL) - start < 5); |
440bce8f KR |
718 | } |
719 | ||
720 | # if defined(OPENSSL_SYS_WINDOWS) | |
721 | ||
722 | typedef HANDLE thread_t; | |
723 | ||
724 | static DWORD WINAPI thread_run(LPVOID arg) | |
725 | { | |
726 | run_multi_thread_test(); | |
03cdfe1e RL |
727 | /* |
728 | * Because we're linking with a static library, we must stop each | |
729 | * thread explicitly, or so says OPENSSL_thread_stop(3) | |
730 | */ | |
731 | OPENSSL_thread_stop(); | |
440bce8f KR |
732 | return 0; |
733 | } | |
734 | ||
735 | static int run_thread(thread_t *t) | |
736 | { | |
737 | *t = CreateThread(NULL, 0, thread_run, NULL, 0, NULL); | |
738 | return *t != NULL; | |
739 | } | |
740 | ||
741 | static int wait_for_thread(thread_t thread) | |
742 | { | |
743 | return WaitForSingleObject(thread, INFINITE) == 0; | |
744 | } | |
745 | ||
746 | # else | |
747 | ||
748 | typedef pthread_t thread_t; | |
749 | ||
750 | static void *thread_run(void *arg) | |
751 | { | |
752 | run_multi_thread_test(); | |
03cdfe1e RL |
753 | /* |
754 | * Because we're linking with a static library, we must stop each | |
755 | * thread explicitly, or so says OPENSSL_thread_stop(3) | |
756 | */ | |
757 | OPENSSL_thread_stop(); | |
440bce8f KR |
758 | return NULL; |
759 | } | |
760 | ||
761 | static int run_thread(thread_t *t) | |
762 | { | |
763 | return pthread_create(t, NULL, thread_run, NULL) == 0; | |
764 | } | |
765 | ||
766 | static int wait_for_thread(thread_t thread) | |
767 | { | |
768 | return pthread_join(thread, NULL) == 0; | |
769 | } | |
770 | ||
771 | # endif | |
772 | ||
773 | /* | |
774 | * The main thread will also run the test, so we'll have THREADS+1 parallel | |
775 | * tests running | |
776 | */ | |
43687d68 | 777 | # define THREADS 3 |
440bce8f KR |
778 | |
779 | static int test_multi_thread(void) | |
780 | { | |
781 | thread_t t[THREADS]; | |
782 | int i; | |
783 | ||
784 | for (i = 0; i < THREADS; i++) | |
785 | run_thread(&t[i]); | |
786 | run_multi_thread_test(); | |
787 | for (i = 0; i < THREADS; i++) | |
788 | wait_for_thread(t[i]); | |
43687d68 DMSP |
789 | |
790 | if (!TEST_true(multi_thread_rand_bytes_succeeded)) | |
791 | return 0; | |
792 | if (!TEST_true(multi_thread_rand_priv_bytes_succeeded)) | |
793 | return 0; | |
794 | ||
440bce8f KR |
795 | return 1; |
796 | } | |
797 | #endif | |
12fb8c3d | 798 | |
7d615e21 P |
799 | static EVP_RAND_CTX *new_drbg(EVP_RAND_CTX *parent) |
800 | { | |
801 | OSSL_PARAM params[2]; | |
802 | EVP_RAND *rand = NULL; | |
803 | EVP_RAND_CTX *drbg = NULL; | |
804 | ||
805 | params[0] = OSSL_PARAM_construct_utf8_string(OSSL_DRBG_PARAM_CIPHER, | |
806 | "AES-256-CTR", 0); | |
807 | params[1] = OSSL_PARAM_construct_end(); | |
808 | ||
809 | if (!TEST_ptr(rand = EVP_RAND_fetch(NULL, "CTR-DRBG", NULL)) | |
810 | || !TEST_ptr(drbg = EVP_RAND_CTX_new(rand, parent)) | |
e494fac7 | 811 | || !TEST_true(EVP_RAND_CTX_set_params(drbg, params))) { |
c23add36 | 812 | EVP_RAND_CTX_free(drbg); |
7d615e21 P |
813 | drbg = NULL; |
814 | } | |
c23add36 | 815 | EVP_RAND_free(rand); |
7d615e21 P |
816 | return drbg; |
817 | } | |
818 | ||
09e76c5d | 819 | static int test_rand_prediction_resistance(void) |
65175163 | 820 | { |
7d615e21 | 821 | EVP_RAND_CTX *x = NULL, *y = NULL, *z = NULL; |
65175163 | 822 | unsigned char buf1[51], buf2[sizeof(buf1)]; |
ce3080e9 | 823 | int ret = 0, xreseed, yreseed, zreseed; |
65175163 | 824 | |
3f078163 P |
825 | if (crngt_skip()) |
826 | return TEST_skip("CRNGT cannot be disabled"); | |
827 | ||
65175163 | 828 | /* Initialise a three long DRBG chain */ |
7d615e21 | 829 | if (!TEST_ptr(x = new_drbg(NULL)) |
ce3080e9 | 830 | || !TEST_true(disable_crngt(x)) |
7198bd1a | 831 | || !TEST_true(EVP_RAND_instantiate(x, 0, 0, NULL, 0, NULL)) |
7d615e21 | 832 | || !TEST_ptr(y = new_drbg(x)) |
7198bd1a | 833 | || !TEST_true(EVP_RAND_instantiate(y, 0, 0, NULL, 0, NULL)) |
7d615e21 | 834 | || !TEST_ptr(z = new_drbg(y)) |
7198bd1a | 835 | || !TEST_true(EVP_RAND_instantiate(z, 0, 0, NULL, 0, NULL))) |
65175163 P |
836 | goto err; |
837 | ||
ce3080e9 P |
838 | /* |
839 | * During a normal reseed, only the last DRBG in the chain should | |
840 | * be reseeded. | |
841 | */ | |
842 | inc_reseed_counter(y); | |
843 | xreseed = reseed_counter(x); | |
844 | yreseed = reseed_counter(y); | |
845 | zreseed = reseed_counter(z); | |
7d615e21 | 846 | if (!TEST_true(EVP_RAND_reseed(z, 0, NULL, 0, NULL, 0)) |
ce3080e9 P |
847 | || !TEST_int_eq(reseed_counter(x), xreseed) |
848 | || !TEST_int_eq(reseed_counter(y), yreseed) | |
849 | || !TEST_int_gt(reseed_counter(z), zreseed)) | |
65175163 P |
850 | goto err; |
851 | ||
852 | /* | |
853 | * When prediction resistance is requested, the request should be | |
ce3080e9 | 854 | * propagated to the primary, so that the entire DRBG chain reseeds. |
65175163 | 855 | */ |
ce3080e9 | 856 | zreseed = reseed_counter(z); |
7d615e21 | 857 | if (!TEST_true(EVP_RAND_reseed(z, 1, NULL, 0, NULL, 0)) |
ce3080e9 P |
858 | || !TEST_int_gt(reseed_counter(x), xreseed) |
859 | || !TEST_int_gt(reseed_counter(y), yreseed) | |
860 | || !TEST_int_gt(reseed_counter(z), zreseed)) | |
65175163 P |
861 | goto err; |
862 | ||
ce3080e9 P |
863 | /* |
864 | * During a normal generate, only the last DRBG should be reseed */ | |
865 | inc_reseed_counter(y); | |
866 | xreseed = reseed_counter(x); | |
867 | yreseed = reseed_counter(y); | |
868 | zreseed = reseed_counter(z); | |
7d615e21 | 869 | if (!TEST_true(EVP_RAND_generate(z, buf1, sizeof(buf1), 0, 0, NULL, 0)) |
ce3080e9 P |
870 | || !TEST_int_eq(reseed_counter(x), xreseed) |
871 | || !TEST_int_eq(reseed_counter(y), yreseed) | |
872 | || !TEST_int_gt(reseed_counter(z), zreseed)) | |
65175163 P |
873 | goto err; |
874 | ||
875 | /* | |
876 | * When a prediction resistant generate is requested, the request | |
ce3080e9 | 877 | * should be propagated to the primary, reseeding the entire DRBG chain. |
65175163 | 878 | */ |
ce3080e9 | 879 | zreseed = reseed_counter(z); |
7d615e21 | 880 | if (!TEST_true(EVP_RAND_generate(z, buf2, sizeof(buf2), 0, 1, NULL, 0)) |
ce3080e9 P |
881 | || !TEST_int_gt(reseed_counter(x), xreseed) |
882 | || !TEST_int_gt(reseed_counter(y), yreseed) | |
883 | || !TEST_int_gt(reseed_counter(z), zreseed) | |
65175163 P |
884 | || !TEST_mem_ne(buf1, sizeof(buf1), buf2, sizeof(buf2))) |
885 | goto err; | |
886 | ||
ce3080e9 P |
887 | /* Verify that a normal reseed still only reseeds the last DRBG */ |
888 | inc_reseed_counter(y); | |
889 | xreseed = reseed_counter(x); | |
890 | yreseed = reseed_counter(y); | |
891 | zreseed = reseed_counter(z); | |
7d615e21 | 892 | if (!TEST_true(EVP_RAND_reseed(z, 0, NULL, 0, NULL, 0)) |
ce3080e9 P |
893 | || !TEST_int_eq(reseed_counter(x), xreseed) |
894 | || !TEST_int_eq(reseed_counter(y), yreseed) | |
895 | || !TEST_int_gt(reseed_counter(z), zreseed)) | |
65175163 P |
896 | goto err; |
897 | ||
898 | ret = 1; | |
899 | err: | |
7d615e21 P |
900 | EVP_RAND_CTX_free(z); |
901 | EVP_RAND_CTX_free(y); | |
902 | EVP_RAND_CTX_free(x); | |
65175163 P |
903 | return ret; |
904 | } | |
905 | ||
ad887416 | 906 | int setup_tests(void) |
12fb8c3d | 907 | { |
09e76c5d DMSP |
908 | ADD_TEST(test_rand_reseed); |
909 | #if defined(OPENSSL_SYS_UNIX) | |
910 | ADD_ALL_TESTS(test_rand_fork_safety, RANDOM_SIZE); | |
911 | #endif | |
912 | ADD_TEST(test_rand_prediction_resistance); | |
440bce8f KR |
913 | #if defined(OPENSSL_THREADS) |
914 | ADD_TEST(test_multi_thread); | |
915 | #endif | |
ad887416 | 916 | return 1; |
12fb8c3d | 917 | } |