2 * Copyright 2011-2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
11 #include "internal/nelem.h"
12 #include <openssl/crypto.h>
13 #include <openssl/err.h>
14 #include <openssl/rand.h>
15 #include <openssl/obj_mac.h>
16 #include <openssl/evp.h>
17 #include <openssl/aes.h>
18 #include "../crypto/rand/rand_lcl.h"
19 #include "../crypto/include/internal/rand_int.h"
28 typedef struct drbg_selftest_data_st
{
33 /* KAT data for no PR */
34 const unsigned char *entropy
;
36 const unsigned char *nonce
;
38 const unsigned char *pers
;
40 const unsigned char *adin
;
42 const unsigned char *entropyreseed
;
43 size_t entropyreseedlen
;
44 const unsigned char *adinreseed
;
46 const unsigned char *adin2
;
48 const unsigned char *expected
;
50 const unsigned char *kat2
;
54 const unsigned char *entropy_pr
;
56 const unsigned char *nonce_pr
;
58 const unsigned char *pers_pr
;
60 const unsigned char *adin_pr
;
62 const unsigned char *entropypr_pr
;
63 size_t entropyprlen_pr
;
64 const unsigned char *ading_pr
;
66 const unsigned char *entropyg_pr
;
67 size_t entropyglen_pr
;
68 const unsigned char *kat_pr
;
70 const unsigned char *kat2_pr
;
74 #define make_drbg_test_data(nid, flag, pr, post) {\
76 pr##_entropyinput, sizeof(pr##_entropyinput), \
77 pr##_nonce, sizeof(pr##_nonce), \
78 pr##_personalizationstring, sizeof(pr##_personalizationstring), \
79 pr##_additionalinput, sizeof(pr##_additionalinput), \
80 pr##_entropyinputreseed, sizeof(pr##_entropyinputreseed), \
81 pr##_additionalinputreseed, sizeof(pr##_additionalinputreseed), \
82 pr##_additionalinput2, sizeof(pr##_additionalinput2), \
83 pr##_int_returnedbits, sizeof(pr##_int_returnedbits), \
84 pr##_returnedbits, sizeof(pr##_returnedbits), \
85 pr##_pr_entropyinput, sizeof(pr##_pr_entropyinput), \
86 pr##_pr_nonce, sizeof(pr##_pr_nonce), \
87 pr##_pr_personalizationstring, sizeof(pr##_pr_personalizationstring), \
88 pr##_pr_additionalinput, sizeof(pr##_pr_additionalinput), \
89 pr##_pr_entropyinputpr, sizeof(pr##_pr_entropyinputpr), \
90 pr##_pr_additionalinput2, sizeof(pr##_pr_additionalinput2), \
91 pr##_pr_entropyinputpr2, sizeof(pr##_pr_entropyinputpr2), \
92 pr##_pr_int_returnedbits, sizeof(pr##_pr_int_returnedbits), \
93 pr##_pr_returnedbits, sizeof(pr##_pr_returnedbits) \
96 #define make_drbg_test_data_use_df(nid, pr, p) \
97 make_drbg_test_data(nid, 0, pr, p)
99 #define make_drbg_test_data_no_df(nid, pr, p) \
100 make_drbg_test_data(nid, RAND_DRBG_FLAG_CTR_NO_DF, pr, p)
102 static DRBG_SELFTEST_DATA drbg_test
[] = {
103 make_drbg_test_data_no_df (NID_aes_128_ctr
, aes_128_no_df
, 0),
104 make_drbg_test_data_no_df (NID_aes_192_ctr
, aes_192_no_df
, 0),
105 make_drbg_test_data_no_df (NID_aes_256_ctr
, aes_256_no_df
, 1),
106 make_drbg_test_data_use_df(NID_aes_128_ctr
, aes_128_use_df
, 0),
107 make_drbg_test_data_use_df(NID_aes_192_ctr
, aes_192_use_df
, 0),
108 make_drbg_test_data_use_df(NID_aes_256_ctr
, aes_256_use_df
, 1),
111 static int app_data_index
;
114 * Test context data, attached as EXDATA to the RAND_DRBG
116 typedef struct test_ctx_st
{
117 const unsigned char *entropy
;
120 const unsigned char *nonce
;
125 static size_t kat_entropy(RAND_DRBG
*drbg
, unsigned char **pout
,
126 int entropy
, size_t min_len
, size_t max_len
,
127 int prediction_resistance
)
129 TEST_CTX
*t
= (TEST_CTX
*)RAND_DRBG_get_ex_data(drbg
, app_data_index
);
132 *pout
= (unsigned char *)t
->entropy
;
133 return t
->entropylen
;
136 static size_t kat_nonce(RAND_DRBG
*drbg
, unsigned char **pout
,
137 int entropy
, size_t min_len
, size_t max_len
)
139 TEST_CTX
*t
= (TEST_CTX
*)RAND_DRBG_get_ex_data(drbg
, app_data_index
);
142 *pout
= (unsigned char *)t
->nonce
;
146 static int uninstantiate(RAND_DRBG
*drbg
)
148 int ret
= drbg
== NULL
? 1 : RAND_DRBG_uninstantiate(drbg
);
155 * Do a single KAT test. Return 0 on failure.
157 static int single_kat(DRBG_SELFTEST_DATA
*td
)
159 RAND_DRBG
*drbg
= NULL
;
162 unsigned char buff
[1024];
165 * Test without PR: Instantiate DRBG with test entropy, nonce and
166 * personalisation string.
168 if (!TEST_ptr(drbg
= RAND_DRBG_new(td
->nid
, td
->flags
, NULL
)))
170 if (!TEST_true(RAND_DRBG_set_callbacks(drbg
, kat_entropy
, NULL
,
175 memset(&t
, 0, sizeof(t
));
176 t
.entropy
= td
->entropy
;
177 t
.entropylen
= td
->entropylen
;
179 t
.noncelen
= td
->noncelen
;
180 RAND_DRBG_set_ex_data(drbg
, app_data_index
, &t
);
182 if (!TEST_true(RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
))
183 || !TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
184 td
->adin
, td
->adinlen
))
185 || !TEST_mem_eq(td
->expected
, td
->exlen
, buff
, td
->exlen
))
188 /* Reseed DRBG with test entropy and additional input */
189 t
.entropy
= td
->entropyreseed
;
190 t
.entropylen
= td
->entropyreseedlen
;
191 if (!TEST_true(RAND_DRBG_reseed(drbg
, td
->adinreseed
, td
->adinreseedlen
, 0)
192 || !TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->kat2len
, 0,
193 td
->adin2
, td
->adin2len
))
194 || !TEST_mem_eq(td
->kat2
, td
->kat2len
, buff
, td
->kat2len
)))
199 * Now test with PR: Instantiate DRBG with test entropy, nonce and
200 * personalisation string.
202 if (!TEST_true(RAND_DRBG_set(drbg
, td
->nid
, td
->flags
))
203 || !TEST_true(RAND_DRBG_set_callbacks(drbg
, kat_entropy
, NULL
,
206 RAND_DRBG_set_ex_data(drbg
, app_data_index
, &t
);
207 t
.entropy
= td
->entropy_pr
;
208 t
.entropylen
= td
->entropylen_pr
;
209 t
.nonce
= td
->nonce_pr
;
210 t
.noncelen
= td
->noncelen_pr
;
213 if (!TEST_true(RAND_DRBG_instantiate(drbg
, td
->pers_pr
, td
->perslen_pr
)))
217 * Now generate with PR: we need to supply entropy as this will
218 * perform a reseed operation.
220 t
.entropy
= td
->entropypr_pr
;
221 t
.entropylen
= td
->entropyprlen_pr
;
222 if (!TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->katlen_pr
, 1,
223 td
->adin_pr
, td
->adinlen_pr
))
224 || !TEST_mem_eq(td
->kat_pr
, td
->katlen_pr
, buff
, td
->katlen_pr
))
228 * Now generate again with PR: supply new entropy again.
230 t
.entropy
= td
->entropyg_pr
;
231 t
.entropylen
= td
->entropyglen_pr
;
233 if (!TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->kat2len_pr
, 1,
234 td
->ading_pr
, td
->adinglen_pr
))
235 || !TEST_mem_eq(td
->kat2_pr
, td
->kat2len_pr
,
236 buff
, td
->kat2len_pr
))
241 RAND_DRBG_free(drbg
);
242 return failures
== 0;
246 * Initialise a DRBG based on selftest data
248 static int init(RAND_DRBG
*drbg
, DRBG_SELFTEST_DATA
*td
, TEST_CTX
*t
)
250 if (!TEST_true(RAND_DRBG_set(drbg
, td
->nid
, td
->flags
))
251 || !TEST_true(RAND_DRBG_set_callbacks(drbg
, kat_entropy
, NULL
,
254 RAND_DRBG_set_ex_data(drbg
, app_data_index
, t
);
255 t
->entropy
= td
->entropy
;
256 t
->entropylen
= td
->entropylen
;
257 t
->nonce
= td
->nonce
;
258 t
->noncelen
= td
->noncelen
;
265 * Initialise and instantiate DRBG based on selftest data
267 static int instantiate(RAND_DRBG
*drbg
, DRBG_SELFTEST_DATA
*td
,
270 if (!TEST_true(init(drbg
, td
, t
))
271 || !TEST_true(RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
)))
277 * Perform extensive error checking as required by SP800-90.
278 * Induce several failure modes and check an error condition is set.
280 static int error_check(DRBG_SELFTEST_DATA
*td
)
282 static char zero
[sizeof(RAND_DRBG
)];
283 RAND_DRBG
*drbg
= NULL
;
285 unsigned char buff
[1024];
286 unsigned int reseed_counter_tmp
;
289 if (!TEST_ptr(drbg
= RAND_DRBG_new(0, 0, NULL
)))
293 * Personalisation string tests
296 /* Test detection of too large personlisation string */
297 if (!init(drbg
, td
, &t
)
298 || RAND_DRBG_instantiate(drbg
, td
->pers
, drbg
->max_perslen
+ 1) > 0)
302 * Entropy source tests
305 /* Test entropy source failure detection: i.e. returns no data */
307 if (TEST_int_le(RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
), 0))
310 /* Try to generate output from uninstantiated DRBG */
311 if (!TEST_false(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
312 td
->adin
, td
->adinlen
))
313 || !uninstantiate(drbg
))
316 /* Test insufficient entropy */
317 t
.entropylen
= drbg
->min_entropylen
- 1;
318 if (!init(drbg
, td
, &t
)
319 || RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
) > 0
320 || !uninstantiate(drbg
))
323 /* Test too much entropy */
324 t
.entropylen
= drbg
->max_entropylen
+ 1;
325 if (!init(drbg
, td
, &t
)
326 || RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
) > 0
327 || !uninstantiate(drbg
))
334 /* Test too small nonce */
335 if (drbg
->min_noncelen
) {
336 t
.noncelen
= drbg
->min_noncelen
- 1;
337 if (!init(drbg
, td
, &t
)
338 || RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
) > 0
339 || !uninstantiate(drbg
))
343 /* Test too large nonce */
344 if (drbg
->max_noncelen
) {
345 t
.noncelen
= drbg
->max_noncelen
+ 1;
346 if (!init(drbg
, td
, &t
)
347 || RAND_DRBG_instantiate(drbg
, td
->pers
, td
->perslen
) > 0
348 || !uninstantiate(drbg
))
352 /* Instantiate with valid data, Check generation is now OK */
353 if (!instantiate(drbg
, td
, &t
)
354 || !TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
355 td
->adin
, td
->adinlen
)))
358 /* Request too much data for one request */
359 if (!TEST_false(RAND_DRBG_generate(drbg
, buff
, drbg
->max_request
+ 1, 0,
360 td
->adin
, td
->adinlen
)))
363 /* Try too large additional input */
364 if (!TEST_false(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
365 td
->adin
, drbg
->max_adinlen
+ 1)))
369 * Check prediction resistance request fails if entropy source
373 if (TEST_false(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 1,
374 td
->adin
, td
->adinlen
))
375 || !uninstantiate(drbg
))
378 /* Instantiate again with valid data */
379 if (!instantiate(drbg
, td
, &t
))
381 reseed_counter_tmp
= drbg
->reseed_gen_counter
;
382 drbg
->reseed_gen_counter
= drbg
->reseed_interval
;
384 /* Generate output and check entropy has been requested for reseed */
386 if (!TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
387 td
->adin
, td
->adinlen
))
388 || !TEST_int_eq(t
.entropycnt
, 1)
389 || !TEST_int_eq(drbg
->reseed_gen_counter
, reseed_counter_tmp
+ 1)
390 || !uninstantiate(drbg
))
394 * Check prediction resistance request fails if entropy source
398 if (!TEST_false(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 1,
399 td
->adin
, td
->adinlen
))
400 || !uninstantiate(drbg
))
403 /* Test reseed counter works */
404 if (!instantiate(drbg
, td
, &t
))
406 reseed_counter_tmp
= drbg
->reseed_gen_counter
;
407 drbg
->reseed_gen_counter
= drbg
->reseed_interval
;
409 /* Generate output and check entropy has been requested for reseed */
411 if (!TEST_true(RAND_DRBG_generate(drbg
, buff
, td
->exlen
, 0,
412 td
->adin
, td
->adinlen
))
413 || !TEST_int_eq(t
.entropycnt
, 1)
414 || !TEST_int_eq(drbg
->reseed_gen_counter
, reseed_counter_tmp
+ 1)
415 || !uninstantiate(drbg
))
419 * Explicit reseed tests
422 /* Test explicit reseed with too large additional input */
423 if (!instantiate(drbg
, td
, &t
)
424 || RAND_DRBG_reseed(drbg
, td
->adin
, drbg
->max_adinlen
+ 1, 0) > 0)
427 /* Test explicit reseed with entropy source failure */
429 if (!TEST_int_le(RAND_DRBG_reseed(drbg
, td
->adin
, td
->adinlen
, 0), 0)
430 || !uninstantiate(drbg
))
433 /* Test explicit reseed with too much entropy */
434 if (!instantiate(drbg
, td
, &t
))
436 t
.entropylen
= drbg
->max_entropylen
+ 1;
437 if (!TEST_int_le(RAND_DRBG_reseed(drbg
, td
->adin
, td
->adinlen
, 0), 0)
438 || !uninstantiate(drbg
))
441 /* Test explicit reseed with too little entropy */
442 if (!instantiate(drbg
, td
, &t
))
444 t
.entropylen
= drbg
->min_entropylen
- 1;
445 if (!TEST_int_le(RAND_DRBG_reseed(drbg
, td
->adin
, td
->adinlen
, 0), 0)
446 || !uninstantiate(drbg
))
449 /* Standard says we have to check uninstantiate really zeroes */
450 if (!TEST_mem_eq(zero
, sizeof(drbg
->data
), &drbg
->data
, sizeof(drbg
->data
)))
457 RAND_DRBG_free(drbg
);
461 static int test_kats(int i
)
463 DRBG_SELFTEST_DATA
*td
= &drbg_test
[i
];
474 static int test_error_checks(int i
)
476 DRBG_SELFTEST_DATA
*td
= &drbg_test
[i
];
488 * Hook context data, attached as EXDATA to the RAND_DRBG
490 typedef struct hook_ctx_st
{
493 * Currently, all DRBGs use the same get_entropy() callback.
494 * The tests however, don't assume this and store
495 * the original callback for every DRBG separately.
497 RAND_DRBG_get_entropy_fn get_entropy
;
498 /* forces a failure of the get_entropy() call if nonzero */
500 /* counts successful reseeds */
504 static HOOK_CTX master_ctx
, public_ctx
, private_ctx
;
506 static HOOK_CTX
*get_hook_ctx(RAND_DRBG
*drbg
)
508 return (HOOK_CTX
*)RAND_DRBG_get_ex_data(drbg
, app_data_index
);
511 /* Intercepts and counts calls to the get_entropy() callback */
512 static size_t get_entropy_hook(RAND_DRBG
*drbg
, unsigned char **pout
,
513 int entropy
, size_t min_len
, size_t max_len
,
514 int prediction_resistance
)
517 HOOK_CTX
*ctx
= get_hook_ctx(drbg
);
522 ret
= ctx
->get_entropy(drbg
, pout
, entropy
, min_len
, max_len
,
523 prediction_resistance
);
530 /* Installs a hook for the get_entropy() callback of the given drbg */
531 static void hook_drbg(RAND_DRBG
*drbg
, HOOK_CTX
*ctx
)
533 memset(ctx
, 0, sizeof(*ctx
));
535 ctx
->get_entropy
= drbg
->get_entropy
;
536 drbg
->get_entropy
= get_entropy_hook
;
537 RAND_DRBG_set_ex_data(drbg
, app_data_index
, ctx
);
540 /* Installs the hook for the get_entropy() callback of the given drbg */
541 static void unhook_drbg(RAND_DRBG
*drbg
)
543 HOOK_CTX
*ctx
= get_hook_ctx(drbg
);
545 drbg
->get_entropy
= ctx
->get_entropy
;
546 CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DRBG
, drbg
, &drbg
->ex_data
);
549 /* Resets the given hook context */
550 static void reset_hook_ctx(HOOK_CTX
*ctx
)
553 ctx
->reseed_count
= 0;
556 /* Resets all drbg hook contexts */
557 static void reset_drbg_hook_ctx(void)
559 reset_hook_ctx(&master_ctx
);
560 reset_hook_ctx(&public_ctx
);
561 reset_hook_ctx(&private_ctx
);
565 * Generates random output using RAND_bytes() and RAND_priv_bytes()
566 * and checks whether the three shared DRBGs were reseeded as
569 * |expect_success|: expected outcome (as reported by RAND_status())
570 * |master|, |public|, |private|: pointers to the three shared DRBGs
571 * |expect_xxx_reseed| =
572 * 1: it is expected that the specified DRBG is reseeded
573 * 0: it is expected that the specified DRBG is not reseeded
574 * -1: don't check whether the specified DRBG was reseeded or not
575 * |reseed_time|: if nonzero, used instead of time(NULL) to set the
576 * |before_reseed| time.
578 static int test_drbg_reseed(int expect_success
,
582 int expect_master_reseed
,
583 int expect_public_reseed
,
584 int expect_private_reseed
,
588 unsigned char buf
[32];
589 time_t before_reseed
, after_reseed
;
590 int expected_state
= (expect_success
? DRBG_READY
: DRBG_ERROR
);
593 * step 1: check preconditions
596 /* Test whether seed propagation is enabled */
597 if (!TEST_int_ne(master
->reseed_prop_counter
, 0)
598 || !TEST_int_ne(public->reseed_prop_counter
, 0)
599 || !TEST_int_ne(private->reseed_prop_counter
, 0))
602 /* Check whether the master DRBG's reseed counter is the largest one */
603 if (!TEST_int_le(public->reseed_prop_counter
, master
->reseed_prop_counter
)
604 || !TEST_int_le(private->reseed_prop_counter
, master
->reseed_prop_counter
))
608 * step 2: generate random output
611 if (reseed_time
== 0)
612 reseed_time
= time(NULL
);
614 /* Generate random output from the public and private DRBG */
615 before_reseed
= expect_master_reseed
== 1 ? reseed_time
: 0;
616 if (!TEST_int_eq(RAND_bytes(buf
, sizeof(buf
)), expect_success
)
617 || !TEST_int_eq(RAND_priv_bytes(buf
, sizeof(buf
)), expect_success
))
619 after_reseed
= time(NULL
);
623 * step 3: check postconditions
626 /* Test whether reseeding succeeded as expected */
627 if (!TEST_int_eq(master
->state
, expected_state
)
628 || !TEST_int_eq(public->state
, expected_state
)
629 || !TEST_int_eq(private->state
, expected_state
))
632 if (expect_master_reseed
>= 0) {
633 /* Test whether master DRBG was reseeded as expected */
634 if (!TEST_int_eq(master_ctx
.reseed_count
, expect_master_reseed
))
638 if (expect_public_reseed
>= 0) {
639 /* Test whether public DRBG was reseeded as expected */
640 if (!TEST_int_eq(public_ctx
.reseed_count
, expect_public_reseed
))
644 if (expect_private_reseed
>= 0) {
645 /* Test whether public DRBG was reseeded as expected */
646 if (!TEST_int_eq(private_ctx
.reseed_count
, expect_private_reseed
))
650 if (expect_success
== 1) {
651 /* Test whether all three reseed counters are synchronized */
652 if (!TEST_int_eq(public->reseed_prop_counter
, master
->reseed_prop_counter
)
653 || !TEST_int_eq(private->reseed_prop_counter
, master
->reseed_prop_counter
))
656 /* Test whether reseed time of master DRBG is set correctly */
657 if (!TEST_time_t_le(before_reseed
, master
->reseed_time
)
658 || !TEST_time_t_le(master
->reseed_time
, after_reseed
))
661 /* Test whether reseed times of child DRBGs are synchronized with master */
662 if (!TEST_time_t_ge(public->reseed_time
, master
->reseed_time
)
663 || !TEST_time_t_ge(private->reseed_time
, master
->reseed_time
))
673 * Test whether the default rand_method (RAND_OpenSSL()) is
674 * setup correctly, in particular whether reseeding works
677 static int test_rand_drbg_reseed(void)
679 RAND_DRBG
*master
, *public, *private;
680 unsigned char rand_add_buf
[256];
682 time_t before_reseed
;
684 /* Check whether RAND_OpenSSL() is the default method */
685 if (!TEST_ptr_eq(RAND_get_rand_method(), RAND_OpenSSL()))
688 /* All three DRBGs should be non-null */
689 if (!TEST_ptr(master
= RAND_DRBG_get0_master())
690 || !TEST_ptr(public = RAND_DRBG_get0_public())
691 || !TEST_ptr(private = RAND_DRBG_get0_private()))
694 /* There should be three distinct DRBGs, two of them chained to master */
695 if (!TEST_ptr_ne(public, private)
696 || !TEST_ptr_ne(public, master
)
697 || !TEST_ptr_ne(private, master
)
698 || !TEST_ptr_eq(public->parent
, master
)
699 || !TEST_ptr_eq(private->parent
, master
))
702 /* uninstantiate the three global DRBGs */
703 RAND_DRBG_uninstantiate(private);
704 RAND_DRBG_uninstantiate(public);
705 RAND_DRBG_uninstantiate(master
);
708 /* Install hooks for the following tests */
709 hook_drbg(master
, &master_ctx
);
710 hook_drbg(public, &public_ctx
);
711 hook_drbg(private, &private_ctx
);
715 * Test initial seeding of shared DRBGs
717 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 1, 1, 1, 0)))
719 reset_drbg_hook_ctx();
723 * Test initial state of shared DRBGs
725 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 0, 0, 0, 0)))
727 reset_drbg_hook_ctx();
730 * Test whether the public and private DRBG are both reseeded when their
731 * reseed counters differ from the master's reseed counter.
733 master
->reseed_prop_counter
++;
734 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 0, 1, 1, 0)))
736 reset_drbg_hook_ctx();
739 * Test whether the public DRBG is reseeded when its reseed counter differs
740 * from the master's reseed counter.
742 master
->reseed_prop_counter
++;
743 private->reseed_prop_counter
++;
744 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 0, 1, 0, 0)))
746 reset_drbg_hook_ctx();
749 * Test whether the private DRBG is reseeded when its reseed counter differs
750 * from the master's reseed counter.
752 master
->reseed_prop_counter
++;
753 public->reseed_prop_counter
++;
754 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 0, 0, 1, 0)))
756 reset_drbg_hook_ctx();
759 /* fill 'randomness' buffer with some arbitrary data */
760 memset(rand_add_buf
, 'r', sizeof(rand_add_buf
));
763 * Test whether all three DRBGs are reseeded by RAND_add().
764 * The before_reseed time has to be measured here and passed into the
765 * test_drbg_reseed() test, because the master DRBG gets already reseeded
766 * in RAND_add(), whence the check for the condition
767 * before_reseed <= master->reseed_time will fail if the time value happens
768 * to increase between the RAND_add() and the test_drbg_reseed() call.
770 before_reseed
= time(NULL
);
771 RAND_add(rand_add_buf
, sizeof(rand_add_buf
), sizeof(rand_add_buf
));
772 if (!TEST_true(test_drbg_reseed(1, master
, public, private, 1, 1, 1,
775 reset_drbg_hook_ctx();
779 * Test whether none of the DRBGs is reseed if the master fails to reseed
782 master
->reseed_prop_counter
++;
783 RAND_add(rand_add_buf
, sizeof(rand_add_buf
), sizeof(rand_add_buf
));
784 if (!TEST_true(test_drbg_reseed(0, master
, public, private, 0, 0, 0, 0)))
786 reset_drbg_hook_ctx();
794 unhook_drbg(private);
799 #if defined(OPENSSL_THREADS)
800 static int multi_thread_rand_bytes_succeeded
= 1;
801 static int multi_thread_rand_priv_bytes_succeeded
= 1;
803 static void run_multi_thread_test(void)
805 unsigned char buf
[256];
806 time_t start
= time(NULL
);
807 RAND_DRBG
*public = NULL
, *private = NULL
;
809 if (!TEST_ptr(public = RAND_DRBG_get0_public())
810 || !TEST_ptr(private = RAND_DRBG_get0_private())) {
811 multi_thread_rand_bytes_succeeded
= 0;
814 RAND_DRBG_set_reseed_time_interval(private, 1);
815 RAND_DRBG_set_reseed_time_interval(public, 1);
818 if (RAND_bytes(buf
, sizeof(buf
)) <= 0)
819 multi_thread_rand_bytes_succeeded
= 0;
820 if (RAND_priv_bytes(buf
, sizeof(buf
)) <= 0)
821 multi_thread_rand_priv_bytes_succeeded
= 0;
823 while(time(NULL
) - start
< 5);
826 # if defined(OPENSSL_SYS_WINDOWS)
828 typedef HANDLE thread_t
;
830 static DWORD WINAPI
thread_run(LPVOID arg
)
832 run_multi_thread_test();
834 * Because we're linking with a static library, we must stop each
835 * thread explicitly, or so says OPENSSL_thread_stop(3)
837 OPENSSL_thread_stop();
841 static int run_thread(thread_t
*t
)
843 *t
= CreateThread(NULL
, 0, thread_run
, NULL
, 0, NULL
);
847 static int wait_for_thread(thread_t thread
)
849 return WaitForSingleObject(thread
, INFINITE
) == 0;
854 typedef pthread_t thread_t
;
856 static void *thread_run(void *arg
)
858 run_multi_thread_test();
860 * Because we're linking with a static library, we must stop each
861 * thread explicitly, or so says OPENSSL_thread_stop(3)
863 OPENSSL_thread_stop();
867 static int run_thread(thread_t
*t
)
869 return pthread_create(t
, NULL
, thread_run
, NULL
) == 0;
872 static int wait_for_thread(thread_t thread
)
874 return pthread_join(thread
, NULL
) == 0;
880 * The main thread will also run the test, so we'll have THREADS+1 parallel
885 static int test_multi_thread(void)
890 for (i
= 0; i
< THREADS
; i
++)
892 run_multi_thread_test();
893 for (i
= 0; i
< THREADS
; i
++)
894 wait_for_thread(t
[i
]);
896 if (!TEST_true(multi_thread_rand_bytes_succeeded
))
898 if (!TEST_true(multi_thread_rand_priv_bytes_succeeded
))
906 * Test that instantiation with RAND_seed() works as expected
908 * If no os entropy source is available then RAND_seed(buffer, bufsize)
909 * is expected to succeed if and only if the buffer length is at least
910 * rand_drbg_seedlen(master) bytes.
912 * If an os entropy source is available then RAND_seed(buffer, bufsize)
913 * is expected to succeed always.
915 static int test_rand_seed(void)
917 RAND_DRBG
*master
= NULL
;
918 unsigned char rand_buf
[256];
920 size_t required_seed_buflen
= 0;
922 if (!TEST_ptr(master
= RAND_DRBG_get0_master()))
925 #ifdef OPENSSL_RAND_SEED_NONE
926 required_seed_buflen
= rand_drbg_seedlen(master
);
929 memset(rand_buf
, 0xCD, sizeof(rand_buf
));
931 for ( rand_buflen
= 256 ; rand_buflen
> 0 ; --rand_buflen
) {
932 RAND_DRBG_uninstantiate(master
);
933 RAND_seed(rand_buf
, rand_buflen
);
935 if (!TEST_int_eq(RAND_status(),
936 (rand_buflen
>= required_seed_buflen
)))
944 * Test that adding additional data with RAND_add() works as expected
945 * when the master DRBG is instantiated (and below its reseed limit).
947 * This should succeed regardless of whether an os entropy source is
950 static int test_rand_add(void)
952 unsigned char rand_buf
[256];
955 memset(rand_buf
, 0xCD, sizeof(rand_buf
));
957 /* make sure it's instantiated */
958 RAND_seed(rand_buf
, sizeof(rand_buf
));
959 if (!TEST_true(RAND_status()))
962 for ( rand_buflen
= 256 ; rand_buflen
> 0 ; --rand_buflen
) {
963 RAND_add(rand_buf
, rand_buflen
, 0.0);
964 if (!TEST_true(RAND_status()))
971 int setup_tests(void)
973 app_data_index
= RAND_DRBG_get_ex_new_index(0L, NULL
, NULL
, NULL
, NULL
);
975 ADD_ALL_TESTS(test_kats
, OSSL_NELEM(drbg_test
));
976 ADD_ALL_TESTS(test_error_checks
, OSSL_NELEM(drbg_test
));
977 ADD_TEST(test_rand_drbg_reseed
);
978 ADD_TEST(test_rand_seed
);
979 ADD_TEST(test_rand_add
);
980 #if defined(OPENSSL_THREADS)
981 ADD_TEST(test_multi_thread
);