bf4c723c779ce11526113e89d07a6df9236231ea
[openssl.git] / test / drbgtest.c
1 /*
2  * Copyright 2011-2018 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 #include <string.h>
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"
20
21 #if defined(_WIN32)
22 # include <windows.h>
23 #endif
24
25 #include "testutil.h"
26 #include "drbgtest.h"
27
28 typedef struct drbg_selftest_data_st {
29     int post;
30     int nid;
31     unsigned int flags;
32
33     /* KAT data for no PR */
34     const unsigned char *entropy;
35     size_t entropylen;
36     const unsigned char *nonce;
37     size_t noncelen;
38     const unsigned char *pers;
39     size_t perslen;
40     const unsigned char *adin;
41     size_t adinlen;
42     const unsigned char *entropyreseed;
43     size_t entropyreseedlen;
44     const unsigned char *adinreseed;
45     size_t adinreseedlen;
46     const unsigned char *adin2;
47     size_t adin2len;
48     const unsigned char *expected;
49     size_t exlen;
50     const unsigned char *kat2;
51     size_t kat2len;
52
53     /* KAT data for PR */
54     const unsigned char *entropy_pr;
55     size_t entropylen_pr;
56     const unsigned char *nonce_pr;
57     size_t noncelen_pr;
58     const unsigned char *pers_pr;
59     size_t perslen_pr;
60     const unsigned char *adin_pr;
61     size_t adinlen_pr;
62     const unsigned char *entropypr_pr;
63     size_t entropyprlen_pr;
64     const unsigned char *ading_pr;
65     size_t adinglen_pr;
66     const unsigned char *entropyg_pr;
67     size_t entropyglen_pr;
68     const unsigned char *kat_pr;
69     size_t katlen_pr;
70     const unsigned char *kat2_pr;
71     size_t kat2len_pr;
72 } DRBG_SELFTEST_DATA;
73
74 #define make_drbg_test_data(nid, flag, pr, post) {\
75     post, nid, flag, \
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) \
94     }
95
96 #define make_drbg_test_data_use_df(nid, pr, p) \
97     make_drbg_test_data(nid, 0, pr, p)
98
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)
101
102 #define make_drbg_test_data_hash(nid, pr, p) \
103     make_drbg_test_data(nid, RAND_DRBG_FLAG_HMAC, hmac_##pr, p), \
104     make_drbg_test_data(nid, 0, pr, p)
105
106 static DRBG_SELFTEST_DATA drbg_test[] = {
107 #ifndef FIPS_MODE
108     /* FIPS mode doesn't support CTR DRBG without a derivation function */
109     make_drbg_test_data_no_df (NID_aes_128_ctr, aes_128_no_df,  0),
110     make_drbg_test_data_no_df (NID_aes_192_ctr, aes_192_no_df,  0),
111     make_drbg_test_data_no_df (NID_aes_256_ctr, aes_256_no_df,  1),
112 #endif
113     make_drbg_test_data_use_df(NID_aes_128_ctr, aes_128_use_df, 0),
114     make_drbg_test_data_use_df(NID_aes_192_ctr, aes_192_use_df, 0),
115     make_drbg_test_data_use_df(NID_aes_256_ctr, aes_256_use_df, 1),
116     make_drbg_test_data_hash(NID_sha1, sha1, 0),
117     make_drbg_test_data_hash(NID_sha224, sha224, 0),
118     make_drbg_test_data_hash(NID_sha256, sha256, 1),
119     make_drbg_test_data_hash(NID_sha384, sha384, 0),
120     make_drbg_test_data_hash(NID_sha512, sha512, 0),
121 };
122
123 static int app_data_index;
124
125 /*
126  * Test context data, attached as EXDATA to the RAND_DRBG
127  */
128 typedef struct test_ctx_st {
129     const unsigned char *entropy;
130     size_t entropylen;
131     int entropycnt;
132     const unsigned char *nonce;
133     size_t noncelen;
134     int noncecnt;
135 } TEST_CTX;
136
137 static size_t kat_entropy(RAND_DRBG *drbg, unsigned char **pout,
138                           int entropy, size_t min_len, size_t max_len,
139                           int prediction_resistance)
140 {
141     TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
142
143     t->entropycnt++;
144     *pout = (unsigned char *)t->entropy;
145     return t->entropylen;
146 }
147
148 static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
149                         int entropy, size_t min_len, size_t max_len)
150 {
151     TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
152
153     t->noncecnt++;
154     *pout = (unsigned char *)t->nonce;
155     return t->noncelen;
156 }
157
158  /*
159  * Disable CRNG testing if it is enabled.
160  * If the DRBG is ready or in an error state, this means an instantiate cycle
161  * for which the default personalisation string is used.
162  */
163 static int disable_crngt(RAND_DRBG *drbg)
164 {
165     static const char pers[] = DRBG_DEFAULT_PERS_STRING;
166     const int instantiate = drbg->state != DRBG_UNINITIALISED;
167
168     if (drbg->get_entropy != rand_crngt_get_entropy)
169         return 1;
170
171      if ((instantiate && !RAND_DRBG_uninstantiate(drbg))
172         || !TEST_true(RAND_DRBG_set_callbacks(drbg, &rand_drbg_get_entropy,
173                                               &rand_drbg_cleanup_entropy,
174                                               &rand_drbg_get_nonce,
175                                               &rand_drbg_cleanup_nonce))
176         || (instantiate
177             && !RAND_DRBG_instantiate(drbg, (const unsigned char *)pers,
178                                       sizeof(pers) - 1)))
179         return 0;
180     return 1;
181 }
182
183 static int uninstantiate(RAND_DRBG *drbg)
184 {
185     int ret = drbg == NULL ? 1 : RAND_DRBG_uninstantiate(drbg);
186
187     ERR_clear_error();
188     return ret;
189 }
190
191 /*
192  * Do a single KAT test.  Return 0 on failure.
193  */
194 static int single_kat(DRBG_SELFTEST_DATA *td)
195 {
196     RAND_DRBG *drbg = NULL;
197     TEST_CTX t;
198     int failures = 0;
199     unsigned char buff[1024];
200
201     /*
202      * Test without PR: Instantiate DRBG with test entropy, nonce and
203      * personalisation string.
204      */
205     if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL)))
206         return 0;
207     if (!TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
208                                            kat_nonce, NULL))
209         || !TEST_true(disable_crngt(drbg))) {
210         failures++;
211         goto err;
212     }
213     memset(&t, 0, sizeof(t));
214     t.entropy = td->entropy;
215     t.entropylen = td->entropylen;
216     t.nonce = td->nonce;
217     t.noncelen = td->noncelen;
218     RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
219
220     if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
221             || !TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
222                                              td->adin, td->adinlen))
223             || !TEST_mem_eq(td->expected, td->exlen, buff, td->exlen))
224         failures++;
225
226     /* Reseed DRBG with test entropy and additional input */
227     t.entropy = td->entropyreseed;
228     t.entropylen = td->entropyreseedlen;
229     if (!TEST_true(RAND_DRBG_reseed(drbg, td->adinreseed, td->adinreseedlen, 0)
230             || !TEST_true(RAND_DRBG_generate(drbg, buff, td->kat2len, 0,
231                                              td->adin2, td->adin2len))
232             || !TEST_mem_eq(td->kat2, td->kat2len, buff, td->kat2len)))
233         failures++;
234     uninstantiate(drbg);
235
236     /*
237      * Now test with PR: Instantiate DRBG with test entropy, nonce and
238      * personalisation string.
239      */
240     if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
241             || !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
242                                                   kat_nonce, NULL)))
243         failures++;
244     RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
245     t.entropy = td->entropy_pr;
246     t.entropylen = td->entropylen_pr;
247     t.nonce = td->nonce_pr;
248     t.noncelen = td->noncelen_pr;
249     t.entropycnt = 0;
250     t.noncecnt = 0;
251     if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers_pr, td->perslen_pr)))
252         failures++;
253
254     /*
255      * Now generate with PR: we need to supply entropy as this will
256      * perform a reseed operation.
257      */
258     t.entropy = td->entropypr_pr;
259     t.entropylen = td->entropyprlen_pr;
260     if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->katlen_pr, 1,
261                                       td->adin_pr, td->adinlen_pr))
262             || !TEST_mem_eq(td->kat_pr, td->katlen_pr, buff, td->katlen_pr))
263         failures++;
264
265     /*
266      * Now generate again with PR: supply new entropy again.
267      */
268     t.entropy = td->entropyg_pr;
269     t.entropylen = td->entropyglen_pr;
270
271     if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->kat2len_pr, 1,
272                                       td->ading_pr, td->adinglen_pr))
273                 || !TEST_mem_eq(td->kat2_pr, td->kat2len_pr,
274                                 buff, td->kat2len_pr))
275         failures++;
276
277 err:
278     uninstantiate(drbg);
279     RAND_DRBG_free(drbg);
280     return failures == 0;
281 }
282
283 /*
284  * Initialise a DRBG based on selftest data
285  */
286 static int init(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td, TEST_CTX *t)
287 {
288     if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
289             || !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
290                                                   kat_nonce, NULL)))
291         return 0;
292     RAND_DRBG_set_ex_data(drbg, app_data_index, t);
293     t->entropy = td->entropy;
294     t->entropylen = td->entropylen;
295     t->nonce = td->nonce;
296     t->noncelen = td->noncelen;
297     t->entropycnt = 0;
298     t->noncecnt = 0;
299     return 1;
300 }
301
302 /*
303  * Initialise and instantiate DRBG based on selftest data
304  */
305 static int instantiate(RAND_DRBG *drbg, DRBG_SELFTEST_DATA *td,
306                        TEST_CTX *t)
307 {
308     if (!TEST_true(init(drbg, td, t))
309             || !TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen)))
310         return 0;
311     return 1;
312 }
313
314 /*
315  * Perform extensive error checking as required by SP800-90.
316  * Induce several failure modes and check an error condition is set.
317  */
318 static int error_check(DRBG_SELFTEST_DATA *td)
319 {
320     static char zero[sizeof(RAND_DRBG)];
321     RAND_DRBG *drbg = NULL;
322     TEST_CTX t;
323     unsigned char buff[1024];
324     unsigned int reseed_counter_tmp;
325     int ret = 0;
326
327     if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL))
328         || !TEST_true(disable_crngt(drbg)))
329         goto err;
330
331     /*
332      * Personalisation string tests
333      */
334
335     /* Test detection of too large personlisation string */
336     if (!init(drbg, td, &t)
337             || RAND_DRBG_instantiate(drbg, td->pers, drbg->max_perslen + 1) > 0)
338         goto err;
339
340     /*
341      * Entropy source tests
342      */
343
344     /* Test entropy source failure detection: i.e. returns no data */
345     t.entropylen = 0;
346     if (TEST_int_le(RAND_DRBG_instantiate(drbg, td->pers, td->perslen), 0))
347         goto err;
348
349     /* Try to generate output from uninstantiated DRBG */
350     if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
351                                        td->adin, td->adinlen))
352             || !uninstantiate(drbg))
353         goto err;
354
355     /* Test insufficient entropy */
356     t.entropylen = drbg->min_entropylen - 1;
357     if (!init(drbg, td, &t)
358             || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
359             || !uninstantiate(drbg))
360         goto err;
361
362     /* Test too much entropy */
363     t.entropylen = drbg->max_entropylen + 1;
364     if (!init(drbg, td, &t)
365             || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
366             || !uninstantiate(drbg))
367         goto err;
368
369     /*
370      * Nonce tests
371      */
372
373     /* Test too small nonce */
374     if (drbg->min_noncelen) {
375         t.noncelen = drbg->min_noncelen - 1;
376         if (!init(drbg, td, &t)
377                 || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
378                 || !uninstantiate(drbg))
379             goto err;
380     }
381
382     /* Test too large nonce */
383     if (drbg->max_noncelen) {
384         t.noncelen = drbg->max_noncelen + 1;
385         if (!init(drbg, td, &t)
386                 || RAND_DRBG_instantiate(drbg, td->pers, td->perslen) > 0
387                 || !uninstantiate(drbg))
388             goto err;
389     }
390
391     /* Instantiate with valid data, Check generation is now OK */
392     if (!instantiate(drbg, td, &t)
393             || !TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
394                                              td->adin, td->adinlen)))
395         goto err;
396
397     /* Request too much data for one request */
398     if (!TEST_false(RAND_DRBG_generate(drbg, buff, drbg->max_request + 1, 0,
399                                        td->adin, td->adinlen)))
400         goto err;
401
402     /* Try too large additional input */
403     if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
404                                        td->adin, drbg->max_adinlen + 1)))
405         goto err;
406
407     /*
408      * Check prediction resistance request fails if entropy source
409      * failure.
410      */
411     t.entropylen = 0;
412     if (TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
413                                       td->adin, td->adinlen))
414             || !uninstantiate(drbg))
415         goto err;
416
417     /* Instantiate again with valid data */
418     if (!instantiate(drbg, td, &t))
419         goto err;
420     reseed_counter_tmp = drbg->reseed_gen_counter;
421     drbg->reseed_gen_counter = drbg->reseed_interval;
422
423     /* Generate output and check entropy has been requested for reseed */
424     t.entropycnt = 0;
425     if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
426                                       td->adin, td->adinlen))
427             || !TEST_int_eq(t.entropycnt, 1)
428             || !TEST_int_eq(drbg->reseed_gen_counter, reseed_counter_tmp + 1)
429             || !uninstantiate(drbg))
430         goto err;
431
432     /*
433      * Check prediction resistance request fails if entropy source
434      * failure.
435      */
436     t.entropylen = 0;
437     if (!TEST_false(RAND_DRBG_generate(drbg, buff, td->exlen, 1,
438                                        td->adin, td->adinlen))
439             || !uninstantiate(drbg))
440         goto err;
441
442     /* Test reseed counter works */
443     if (!instantiate(drbg, td, &t))
444         goto err;
445     reseed_counter_tmp = drbg->reseed_gen_counter;
446     drbg->reseed_gen_counter = drbg->reseed_interval;
447
448     /* Generate output and check entropy has been requested for reseed */
449     t.entropycnt = 0;
450     if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
451                                       td->adin, td->adinlen))
452             || !TEST_int_eq(t.entropycnt, 1)
453             || !TEST_int_eq(drbg->reseed_gen_counter, reseed_counter_tmp + 1)
454             || !uninstantiate(drbg))
455         goto err;
456
457     /*
458      * Explicit reseed tests
459      */
460
461     /* Test explicit reseed with too large additional input */
462     if (!instantiate(drbg, td, &t)
463             || RAND_DRBG_reseed(drbg, td->adin, drbg->max_adinlen + 1, 0) > 0)
464         goto err;
465
466     /* Test explicit reseed with entropy source failure */
467     t.entropylen = 0;
468     if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
469             || !uninstantiate(drbg))
470         goto err;
471
472     /* Test explicit reseed with too much entropy */
473     if (!instantiate(drbg, td, &t))
474         goto err;
475     t.entropylen = drbg->max_entropylen + 1;
476     if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
477             || !uninstantiate(drbg))
478         goto err;
479
480     /* Test explicit reseed with too little entropy */
481     if (!instantiate(drbg, td, &t))
482         goto err;
483     t.entropylen = drbg->min_entropylen - 1;
484     if (!TEST_int_le(RAND_DRBG_reseed(drbg, td->adin, td->adinlen, 0), 0)
485             || !uninstantiate(drbg))
486         goto err;
487
488     /* Standard says we have to check uninstantiate really zeroes */
489     if (!TEST_mem_eq(zero, sizeof(drbg->data), &drbg->data, sizeof(drbg->data)))
490         goto err;
491
492     ret = 1;
493
494 err:
495     uninstantiate(drbg);
496     RAND_DRBG_free(drbg);
497     return ret;
498 }
499
500 static int test_kats(int i)
501 {
502     DRBG_SELFTEST_DATA *td = &drbg_test[i];
503     int rv = 0;
504
505     if (!single_kat(td))
506         goto err;
507     rv = 1;
508
509 err:
510     return rv;
511 }
512
513 static int test_error_checks(int i)
514 {
515     DRBG_SELFTEST_DATA *td = &drbg_test[i];
516     int rv = 0;
517
518     if (error_check(td))
519         goto err;
520     rv = 1;
521
522 err:
523     return rv;
524 }
525
526 /*
527  * Hook context data, attached as EXDATA to the RAND_DRBG
528  */
529 typedef struct hook_ctx_st {
530     RAND_DRBG *drbg;
531     /*
532      * Currently, all DRBGs use the same get_entropy() callback.
533      * The tests however, don't assume this and store
534      * the original callback for every DRBG separately.
535      */
536     RAND_DRBG_get_entropy_fn get_entropy;
537     /* forces a failure of the get_entropy() call if nonzero */
538     int fail;
539     /* counts successful reseeds */
540     int reseed_count;
541 } HOOK_CTX;
542
543 static HOOK_CTX master_ctx, public_ctx, private_ctx;
544
545 static HOOK_CTX *get_hook_ctx(RAND_DRBG *drbg)
546 {
547     return (HOOK_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
548 }
549
550 /* Intercepts and counts calls to the get_entropy() callback */
551 static size_t get_entropy_hook(RAND_DRBG *drbg, unsigned char **pout,
552                               int entropy, size_t min_len, size_t max_len,
553                               int prediction_resistance)
554 {
555     size_t ret;
556     HOOK_CTX *ctx = get_hook_ctx(drbg);
557
558     if (ctx->fail != 0)
559         return 0;
560
561     ret = ctx->get_entropy(drbg, pout, entropy, min_len, max_len,
562                            prediction_resistance);
563
564     if (ret != 0)
565         ctx->reseed_count++;
566     return ret;
567 }
568
569 /* Installs a hook for the get_entropy() callback of the given drbg */
570 static void hook_drbg(RAND_DRBG *drbg, HOOK_CTX *ctx)
571 {
572     memset(ctx, 0, sizeof(*ctx));
573     ctx->drbg = drbg;
574     ctx->get_entropy = drbg->get_entropy;
575     drbg->get_entropy = get_entropy_hook;
576     RAND_DRBG_set_ex_data(drbg, app_data_index, ctx);
577 }
578
579 /* Installs the hook for the get_entropy() callback of the given drbg */
580 static void unhook_drbg(RAND_DRBG *drbg)
581 {
582     HOOK_CTX *ctx = get_hook_ctx(drbg);
583
584     drbg->get_entropy = ctx->get_entropy;
585     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DRBG, drbg, &drbg->ex_data);
586 }
587
588 /* Resets the given hook context */
589 static void reset_hook_ctx(HOOK_CTX *ctx)
590 {
591     ctx->fail = 0;
592     ctx->reseed_count = 0;
593 }
594
595 /* Resets all drbg hook contexts */
596 static void reset_drbg_hook_ctx(void)
597 {
598     reset_hook_ctx(&master_ctx);
599     reset_hook_ctx(&public_ctx);
600     reset_hook_ctx(&private_ctx);
601 }
602
603 /*
604  * Generates random output using RAND_bytes() and RAND_priv_bytes()
605  * and checks whether the three shared DRBGs were reseeded as
606  * expected.
607  *
608  * |expect_success|: expected outcome (as reported by RAND_status())
609  * |master|, |public|, |private|: pointers to the three shared DRBGs
610  * |expect_xxx_reseed| =
611  *       1:  it is expected that the specified DRBG is reseeded
612  *       0:  it is expected that the specified DRBG is not reseeded
613  *      -1:  don't check whether the specified DRBG was reseeded or not
614  * |reseed_time|: if nonzero, used instead of time(NULL) to set the
615  *                |before_reseed| time.
616  */
617 static int test_drbg_reseed(int expect_success,
618                             RAND_DRBG *master,
619                             RAND_DRBG *public,
620                             RAND_DRBG *private,
621                             int expect_master_reseed,
622                             int expect_public_reseed,
623                             int expect_private_reseed,
624                             time_t reseed_time
625                            )
626 {
627     unsigned char buf[32];
628     time_t before_reseed, after_reseed;
629     int expected_state = (expect_success ? DRBG_READY : DRBG_ERROR);
630
631     /*
632      * step 1: check preconditions
633      */
634
635     /* Test whether seed propagation is enabled */
636     if (!TEST_int_ne(master->reseed_prop_counter, 0)
637         || !TEST_int_ne(public->reseed_prop_counter, 0)
638         || !TEST_int_ne(private->reseed_prop_counter, 0))
639         return 0;
640
641     /* Check whether the master DRBG's reseed counter is the largest one */
642     if (!TEST_int_le(public->reseed_prop_counter, master->reseed_prop_counter)
643         || !TEST_int_le(private->reseed_prop_counter, master->reseed_prop_counter))
644         return 0;
645
646     /*
647      * step 2: generate random output
648      */
649
650     if (reseed_time == 0)
651         reseed_time = time(NULL);
652
653     /* Generate random output from the public and private DRBG */
654     before_reseed = expect_master_reseed == 1 ? reseed_time : 0;
655     if (!TEST_int_eq(RAND_bytes(buf, sizeof(buf)), expect_success)
656         || !TEST_int_eq(RAND_priv_bytes(buf, sizeof(buf)), expect_success))
657         return 0;
658     after_reseed = time(NULL);
659
660
661     /*
662      * step 3: check postconditions
663      */
664
665     /* Test whether reseeding succeeded as expected */
666     if (!TEST_int_eq(master->state, expected_state)
667         || !TEST_int_eq(public->state, expected_state)
668         || !TEST_int_eq(private->state, expected_state))
669         return 0;
670
671     if (expect_master_reseed >= 0) {
672         /* Test whether master DRBG was reseeded as expected */
673         if (!TEST_int_eq(master_ctx.reseed_count, expect_master_reseed))
674             return 0;
675     }
676
677     if (expect_public_reseed >= 0) {
678         /* Test whether public DRBG was reseeded as expected */
679         if (!TEST_int_eq(public_ctx.reseed_count, expect_public_reseed))
680             return 0;
681     }
682
683     if (expect_private_reseed >= 0) {
684         /* Test whether public DRBG was reseeded as expected */
685         if (!TEST_int_eq(private_ctx.reseed_count, expect_private_reseed))
686             return 0;
687     }
688
689     if (expect_success == 1) {
690         /* Test whether all three reseed counters are synchronized */
691         if (!TEST_int_eq(public->reseed_prop_counter, master->reseed_prop_counter)
692             || !TEST_int_eq(private->reseed_prop_counter, master->reseed_prop_counter))
693             return 0;
694
695         /* Test whether reseed time of master DRBG is set correctly */
696         if (!TEST_time_t_le(before_reseed, master->reseed_time)
697             || !TEST_time_t_le(master->reseed_time, after_reseed))
698             return 0;
699
700         /* Test whether reseed times of child DRBGs are synchronized with master */
701         if (!TEST_time_t_ge(public->reseed_time, master->reseed_time)
702             || !TEST_time_t_ge(private->reseed_time, master->reseed_time))
703             return 0;
704     } else {
705         ERR_clear_error();
706     }
707
708     return 1;
709 }
710
711 /*
712  * Test whether the default rand_method (RAND_OpenSSL()) is
713  * setup correctly, in particular whether reseeding  works
714  * as designed.
715  */
716 static int test_rand_drbg_reseed(void)
717 {
718     RAND_DRBG *master, *public, *private;
719     unsigned char rand_add_buf[256];
720     int rv=0;
721     time_t before_reseed;
722
723     /* Check whether RAND_OpenSSL() is the default method */
724     if (!TEST_ptr_eq(RAND_get_rand_method(), RAND_OpenSSL()))
725         return 0;
726
727     /* All three DRBGs should be non-null */
728     if (!TEST_ptr(master = RAND_DRBG_get0_master())
729         || !TEST_ptr(public = RAND_DRBG_get0_public())
730         || !TEST_ptr(private = RAND_DRBG_get0_private()))
731         return 0;
732
733     /* There should be three distinct DRBGs, two of them chained to master */
734     if (!TEST_ptr_ne(public, private)
735         || !TEST_ptr_ne(public, master)
736         || !TEST_ptr_ne(private, master)
737         || !TEST_ptr_eq(public->parent, master)
738         || !TEST_ptr_eq(private->parent, master))
739         return 0;
740
741     /* Disable CRNG testing for the master DRBG */
742     if (!TEST_true(disable_crngt(master)))
743         return 0;
744
745     /* uninstantiate the three global DRBGs */
746     RAND_DRBG_uninstantiate(private);
747     RAND_DRBG_uninstantiate(public);
748     RAND_DRBG_uninstantiate(master);
749
750
751     /* Install hooks for the following tests */
752     hook_drbg(master,  &master_ctx);
753     hook_drbg(public,  &public_ctx);
754     hook_drbg(private, &private_ctx);
755
756
757     /*
758      * Test initial seeding of shared DRBGs
759      */
760     if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1, 0)))
761         goto error;
762     reset_drbg_hook_ctx();
763
764
765     /*
766      * Test initial state of shared DRBGs
767      */
768     if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 0, 0)))
769         goto error;
770     reset_drbg_hook_ctx();
771
772     /*
773      * Test whether the public and private DRBG are both reseeded when their
774      * reseed counters differ from the master's reseed counter.
775      */
776     master->reseed_prop_counter++;
777     if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 1, 0)))
778         goto error;
779     reset_drbg_hook_ctx();
780
781     /*
782      * Test whether the public DRBG is reseeded when its reseed counter differs
783      * from the master's reseed counter.
784      */
785     master->reseed_prop_counter++;
786     private->reseed_prop_counter++;
787     if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 1, 0, 0)))
788         goto error;
789     reset_drbg_hook_ctx();
790
791     /*
792      * Test whether the private DRBG is reseeded when its reseed counter differs
793      * from the master's reseed counter.
794      */
795     master->reseed_prop_counter++;
796     public->reseed_prop_counter++;
797     if (!TEST_true(test_drbg_reseed(1, master, public, private, 0, 0, 1, 0)))
798         goto error;
799     reset_drbg_hook_ctx();
800
801
802     /* fill 'randomness' buffer with some arbitrary data */
803     memset(rand_add_buf, 'r', sizeof(rand_add_buf));
804
805     /*
806      * Test whether all three DRBGs are reseeded by RAND_add().
807      * The before_reseed time has to be measured here and passed into the
808      * test_drbg_reseed() test, because the master DRBG gets already reseeded
809      * in RAND_add(), whence the check for the condition
810      * before_reseed <= master->reseed_time will fail if the time value happens
811      * to increase between the RAND_add() and the test_drbg_reseed() call.
812      */
813     before_reseed = time(NULL);
814     RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
815     if (!TEST_true(test_drbg_reseed(1, master, public, private, 1, 1, 1,
816                                     before_reseed)))
817         goto error;
818     reset_drbg_hook_ctx();
819
820
821     /*
822      * Test whether none of the DRBGs is reseed if the master fails to reseed
823      */
824     master_ctx.fail = 1;
825     master->reseed_prop_counter++;
826     RAND_add(rand_add_buf, sizeof(rand_add_buf), sizeof(rand_add_buf));
827     if (!TEST_true(test_drbg_reseed(0, master, public, private, 0, 0, 0, 0)))
828         goto error;
829     reset_drbg_hook_ctx();
830
831     rv = 1;
832
833 error:
834     /* Remove hooks  */
835     unhook_drbg(master);
836     unhook_drbg(public);
837     unhook_drbg(private);
838
839     return rv;
840 }
841
842 #if defined(OPENSSL_THREADS)
843 static int multi_thread_rand_bytes_succeeded = 1;
844 static int multi_thread_rand_priv_bytes_succeeded = 1;
845
846 static void run_multi_thread_test(void)
847 {
848     unsigned char buf[256];
849     time_t start = time(NULL);
850     RAND_DRBG *public = NULL, *private = NULL;
851
852     if (!TEST_ptr(public = RAND_DRBG_get0_public())
853             || !TEST_ptr(private = RAND_DRBG_get0_private())) {
854         multi_thread_rand_bytes_succeeded = 0;
855         return;
856     }
857     RAND_DRBG_set_reseed_time_interval(private, 1);
858     RAND_DRBG_set_reseed_time_interval(public, 1);
859
860     do {
861         if (RAND_bytes(buf, sizeof(buf)) <= 0)
862             multi_thread_rand_bytes_succeeded = 0;
863         if (RAND_priv_bytes(buf, sizeof(buf)) <= 0)
864             multi_thread_rand_priv_bytes_succeeded = 0;
865     }
866     while(time(NULL) - start < 5);
867 }
868
869 # if defined(OPENSSL_SYS_WINDOWS)
870
871 typedef HANDLE thread_t;
872
873 static DWORD WINAPI thread_run(LPVOID arg)
874 {
875     run_multi_thread_test();
876     /*
877      * Because we're linking with a static library, we must stop each
878      * thread explicitly, or so says OPENSSL_thread_stop(3)
879      */
880     OPENSSL_thread_stop();
881     return 0;
882 }
883
884 static int run_thread(thread_t *t)
885 {
886     *t = CreateThread(NULL, 0, thread_run, NULL, 0, NULL);
887     return *t != NULL;
888 }
889
890 static int wait_for_thread(thread_t thread)
891 {
892     return WaitForSingleObject(thread, INFINITE) == 0;
893 }
894
895 # else
896
897 typedef pthread_t thread_t;
898
899 static void *thread_run(void *arg)
900 {
901     run_multi_thread_test();
902     /*
903      * Because we're linking with a static library, we must stop each
904      * thread explicitly, or so says OPENSSL_thread_stop(3)
905      */
906     OPENSSL_thread_stop();
907     return NULL;
908 }
909
910 static int run_thread(thread_t *t)
911 {
912     return pthread_create(t, NULL, thread_run, NULL) == 0;
913 }
914
915 static int wait_for_thread(thread_t thread)
916 {
917     return pthread_join(thread, NULL) == 0;
918 }
919
920 # endif
921
922 /*
923  * The main thread will also run the test, so we'll have THREADS+1 parallel
924  * tests running
925  */
926 # define THREADS 3
927
928 static int test_multi_thread(void)
929 {
930     thread_t t[THREADS];
931     int i;
932
933     for (i = 0; i < THREADS; i++)
934         run_thread(&t[i]);
935     run_multi_thread_test();
936     for (i = 0; i < THREADS; i++)
937         wait_for_thread(t[i]);
938
939     if (!TEST_true(multi_thread_rand_bytes_succeeded))
940         return 0;
941     if (!TEST_true(multi_thread_rand_priv_bytes_succeeded))
942         return 0;
943
944     return 1;
945 }
946 #endif
947
948 /*
949  * Test that instantiation with RAND_seed() works as expected
950  *
951  * If no os entropy source is available then RAND_seed(buffer, bufsize)
952  * is expected to succeed if and only if the buffer length is at least
953  * rand_drbg_seedlen(master) bytes.
954  *
955  * If an os entropy source is available then RAND_seed(buffer, bufsize)
956  * is expected to succeed always.
957  */
958 static int test_rand_seed(void)
959 {
960     RAND_DRBG *master = NULL;
961     unsigned char rand_buf[256];
962     size_t rand_buflen;
963     size_t required_seed_buflen = 0;
964
965     if (!TEST_ptr(master = RAND_DRBG_get0_master())
966         || !TEST_true(disable_crngt(master)))
967         return 0;
968
969 #ifdef OPENSSL_RAND_SEED_NONE
970     required_seed_buflen = rand_drbg_seedlen(master);
971 #endif
972
973     memset(rand_buf, 0xCD, sizeof(rand_buf));
974
975     for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
976         RAND_DRBG_uninstantiate(master);
977         RAND_seed(rand_buf, rand_buflen);
978
979         if (!TEST_int_eq(RAND_status(),
980                          (rand_buflen >= required_seed_buflen)))
981             return 0;
982     }
983
984     return 1;
985 }
986
987 /*
988  * Test that adding additional data with RAND_add() works as expected
989  * when the master DRBG is instantiated (and below its reseed limit).
990  *
991  * This should succeed regardless of whether an os entropy source is
992  * available or not.
993  */
994 static int test_rand_add(void)
995 {
996     unsigned char rand_buf[256];
997     size_t rand_buflen;
998
999     memset(rand_buf, 0xCD, sizeof(rand_buf));
1000
1001     /* make sure it's instantiated */
1002     RAND_seed(rand_buf, sizeof(rand_buf));
1003     if (!TEST_true(RAND_status()))
1004         return 0;
1005
1006     for ( rand_buflen = 256 ; rand_buflen > 0 ; --rand_buflen ) {
1007         RAND_add(rand_buf, rand_buflen, 0.0);
1008         if (!TEST_true(RAND_status()))
1009             return 0;
1010     }
1011
1012     return 1;
1013 }
1014
1015 static int test_rand_drbg_prediction_resistance(void)
1016 {
1017     RAND_DRBG *m = NULL, *i = NULL, *s = NULL;
1018     unsigned char buf1[51], buf2[sizeof(buf1)];
1019     int ret = 0, mreseed, ireseed, sreseed;
1020
1021     /* Initialise a three long DRBG chain */
1022     if (!TEST_ptr(m = RAND_DRBG_new(0, 0, NULL))
1023         || !TEST_true(disable_crngt(m))
1024         || !TEST_true(RAND_DRBG_instantiate(m, NULL, 0))
1025         || !TEST_ptr(i = RAND_DRBG_new(0, 0, m))
1026         || !TEST_true(RAND_DRBG_instantiate(i, NULL, 0))
1027         || !TEST_ptr(s = RAND_DRBG_new(0, 0, i))
1028         || !TEST_true(RAND_DRBG_instantiate(s, NULL, 0)))
1029         goto err;
1030
1031     /* During a normal reseed, only the slave DRBG should be reseed */
1032     mreseed = ++m->reseed_prop_counter;
1033     ireseed = ++i->reseed_prop_counter;
1034     sreseed = s->reseed_prop_counter;
1035     if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 0))
1036         || !TEST_int_eq(m->reseed_prop_counter, mreseed)
1037         || !TEST_int_eq(i->reseed_prop_counter, ireseed)
1038         || !TEST_int_gt(s->reseed_prop_counter, sreseed))
1039         goto err;
1040
1041     /*
1042      * When prediction resistance is requested, the request should be
1043      * propagated to the master, so that the entire DRBG chain reseeds.
1044      */
1045     sreseed = s->reseed_prop_counter;
1046     if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 1))
1047         || !TEST_int_gt(m->reseed_prop_counter, mreseed)
1048         || !TEST_int_gt(i->reseed_prop_counter, ireseed)
1049         || !TEST_int_gt(s->reseed_prop_counter, sreseed))
1050         goto err;
1051
1052     /* During a normal generate, only the slave DRBG should be reseed */
1053     mreseed = ++m->reseed_prop_counter;
1054     ireseed = ++i->reseed_prop_counter;
1055     sreseed = s->reseed_prop_counter;
1056     if (!TEST_true(RAND_DRBG_generate(s, buf1, sizeof(buf1), 0, NULL, 0))
1057         || !TEST_int_eq(m->reseed_prop_counter, mreseed)
1058         || !TEST_int_eq(i->reseed_prop_counter, ireseed)
1059         || !TEST_int_gt(s->reseed_prop_counter, sreseed))
1060         goto err;
1061
1062     /*
1063      * When a prediction resistant generate is requested, the request
1064      * should be propagated to the master, reseeding the entire DRBG chain.
1065      */
1066     sreseed = s->reseed_prop_counter;
1067     if (!TEST_true(RAND_DRBG_generate(s, buf2, sizeof(buf2), 1, NULL, 0))
1068         || !TEST_int_gt(m->reseed_prop_counter, mreseed)
1069         || !TEST_int_gt(i->reseed_prop_counter, ireseed)
1070         || !TEST_int_gt(s->reseed_prop_counter, sreseed)
1071         || !TEST_mem_ne(buf1, sizeof(buf1), buf2, sizeof(buf2)))
1072         goto err;
1073
1074     /* Verify that a normal reseed still only reseeds the slave DRBG */
1075     mreseed = ++m->reseed_prop_counter;
1076     ireseed = ++i->reseed_prop_counter;
1077     sreseed = s->reseed_prop_counter;
1078     if (!TEST_true(RAND_DRBG_reseed(s, NULL, 0, 0))
1079         || !TEST_int_eq(m->reseed_prop_counter, mreseed)
1080         || !TEST_int_eq(i->reseed_prop_counter, ireseed)
1081         || !TEST_int_gt(s->reseed_prop_counter, sreseed))
1082         goto err;
1083
1084     ret = 1;
1085 err:
1086     RAND_DRBG_free(s);
1087     RAND_DRBG_free(i);
1088     RAND_DRBG_free(m);
1089     return ret;
1090 }
1091
1092 static int test_multi_set(void)
1093 {
1094     int rv = 0;
1095     RAND_DRBG *drbg = NULL;
1096
1097     /* init drbg with default CTR initializer */
1098     if (!TEST_ptr(drbg = RAND_DRBG_new(0, 0, NULL))
1099         || !TEST_true(disable_crngt(drbg)))
1100         goto err;
1101     /* change it to use hmac */
1102     if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
1103         goto err;
1104     /* use same type */
1105     if (!TEST_true(RAND_DRBG_set(drbg, NID_sha1, RAND_DRBG_FLAG_HMAC)))
1106         goto err;
1107     /* change it to use hash */
1108     if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
1109         goto err;
1110     /* use same type */
1111     if (!TEST_true(RAND_DRBG_set(drbg, NID_sha256, 0)))
1112         goto err;
1113     /* change it to use ctr */
1114     if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
1115         goto err;
1116     /* use same type */
1117     if (!TEST_true(RAND_DRBG_set(drbg, NID_aes_192_ctr, 0)))
1118         goto err;
1119     if (!TEST_int_gt(RAND_DRBG_instantiate(drbg, NULL, 0), 0))
1120         goto err;
1121
1122     rv = 1;
1123 err:
1124     uninstantiate(drbg);
1125     RAND_DRBG_free(drbg);
1126     return rv;
1127 }
1128
1129 static int test_set_defaults(void)
1130 {
1131     RAND_DRBG *master = NULL, *public = NULL, *private = NULL;
1132
1133            /* Check the default type and flags for master, public and private */
1134     return TEST_ptr(master = RAND_DRBG_get0_master())
1135            && TEST_ptr(public = RAND_DRBG_get0_public())
1136            && TEST_ptr(private = RAND_DRBG_get0_private())
1137            && TEST_int_eq(master->type, RAND_DRBG_TYPE)
1138            && TEST_int_eq(master->flags,
1139                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_MASTER)
1140            && TEST_int_eq(public->type, RAND_DRBG_TYPE)
1141            && TEST_int_eq(public->flags,
1142                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
1143            && TEST_int_eq(private->type, RAND_DRBG_TYPE)
1144            && TEST_int_eq(private->flags,
1145                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
1146
1147            /* change master DRBG and check again */
1148            && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
1149                                                RAND_DRBG_FLAG_MASTER))
1150            && TEST_true(RAND_DRBG_uninstantiate(master))
1151            && TEST_int_eq(master->type, NID_sha256)
1152            && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
1153            && TEST_int_eq(public->type, RAND_DRBG_TYPE)
1154            && TEST_int_eq(public->flags,
1155                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
1156            && TEST_int_eq(private->type, RAND_DRBG_TYPE)
1157            && TEST_int_eq(private->flags,
1158                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PRIVATE)
1159            /* change private DRBG and check again */
1160            && TEST_true(RAND_DRBG_set_defaults(NID_sha256,
1161                         RAND_DRBG_FLAG_PRIVATE|RAND_DRBG_FLAG_HMAC))
1162            && TEST_true(RAND_DRBG_uninstantiate(private))
1163            && TEST_int_eq(master->type, NID_sha256)
1164            && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
1165            && TEST_int_eq(public->type, RAND_DRBG_TYPE)
1166            && TEST_int_eq(public->flags,
1167                           RAND_DRBG_FLAGS | RAND_DRBG_FLAG_PUBLIC)
1168            && TEST_int_eq(private->type, NID_sha256)
1169            && TEST_int_eq(private->flags,
1170                           RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
1171            /* change public DRBG and check again */
1172            && TEST_true(RAND_DRBG_set_defaults(NID_sha1,
1173                                                RAND_DRBG_FLAG_PUBLIC
1174                                                | RAND_DRBG_FLAG_HMAC))
1175            && TEST_true(RAND_DRBG_uninstantiate(public))
1176            && TEST_int_eq(master->type, NID_sha256)
1177            && TEST_int_eq(master->flags, RAND_DRBG_FLAG_MASTER)
1178            && TEST_int_eq(public->type, NID_sha1)
1179            && TEST_int_eq(public->flags,
1180                           RAND_DRBG_FLAG_PUBLIC | RAND_DRBG_FLAG_HMAC)
1181            && TEST_int_eq(private->type, NID_sha256)
1182            && TEST_int_eq(private->flags,
1183                           RAND_DRBG_FLAG_PRIVATE | RAND_DRBG_FLAG_HMAC)
1184            /* Change DRBG defaults and change public and check again */
1185            && TEST_true(RAND_DRBG_set_defaults(NID_sha256, 0))
1186            && TEST_true(RAND_DRBG_uninstantiate(public))
1187            && TEST_int_eq(public->type, NID_sha256)
1188            && TEST_int_eq(public->flags, RAND_DRBG_FLAG_PUBLIC)
1189
1190           /* FIPS mode doesn't support CTR DRBG without a derivation function */
1191 #ifndef FIPS_MODE
1192           /* Change DRBG defaults and change master and check again */
1193            && TEST_true(RAND_DRBG_set_defaults(NID_aes_256_ctr,
1194                                                RAND_DRBG_FLAG_CTR_NO_DF))
1195            && TEST_true(RAND_DRBG_uninstantiate(master))
1196            && TEST_int_eq(master->type, NID_aes_256_ctr)
1197            && TEST_int_eq(master->flags,
1198                           RAND_DRBG_FLAG_MASTER|RAND_DRBG_FLAG_CTR_NO_DF)
1199 #endif
1200            /* Reset back to the standard defaults */
1201            && TEST_true(RAND_DRBG_set_defaults(RAND_DRBG_TYPE,
1202                                                RAND_DRBG_FLAGS
1203                                                | RAND_DRBG_FLAG_MASTER
1204                                                | RAND_DRBG_FLAG_PUBLIC
1205                                                | RAND_DRBG_FLAG_PRIVATE))
1206            && TEST_true(RAND_DRBG_uninstantiate(master))
1207            && TEST_true(RAND_DRBG_uninstantiate(public))
1208            && TEST_true(RAND_DRBG_uninstantiate(private));
1209 }
1210
1211 /*
1212  * A list of the FIPS DRGB types.
1213  * Because of the way HMAC DRGBs are implemented, both the NID and flags
1214  * are required.
1215  */
1216 static const struct s_drgb_types {
1217     int nid;
1218     int flags;
1219 } drgb_types[] = {
1220     { NID_aes_128_ctr,  0                   },
1221     { NID_aes_192_ctr,  0                   },
1222     { NID_aes_256_ctr,  0                   },
1223     { NID_sha1,         0                   },
1224     { NID_sha224,       0                   },
1225     { NID_sha256,       0                   },
1226     { NID_sha384,       0                   },
1227     { NID_sha512,       0                   },
1228     { NID_sha512_224,   0                   },
1229     { NID_sha512_256,   0                   },
1230     { NID_sha3_224,     0                   },
1231     { NID_sha3_256,     0                   },
1232     { NID_sha3_384,     0                   },
1233     { NID_sha3_512,     0                   },
1234     { NID_sha1,         RAND_DRBG_FLAG_HMAC },
1235     { NID_sha224,       RAND_DRBG_FLAG_HMAC },
1236     { NID_sha256,       RAND_DRBG_FLAG_HMAC },
1237     { NID_sha384,       RAND_DRBG_FLAG_HMAC },
1238     { NID_sha512,       RAND_DRBG_FLAG_HMAC },
1239     { NID_sha512_224,   RAND_DRBG_FLAG_HMAC },
1240     { NID_sha512_256,   RAND_DRBG_FLAG_HMAC },
1241     { NID_sha3_224,     RAND_DRBG_FLAG_HMAC },
1242     { NID_sha3_256,     RAND_DRBG_FLAG_HMAC },
1243     { NID_sha3_384,     RAND_DRBG_FLAG_HMAC },
1244     { NID_sha3_512,     RAND_DRBG_FLAG_HMAC },
1245 };
1246
1247 /* Six cases for each covers seed sizes up to 32 bytes */
1248 static const size_t crngt_num_cases = 6;
1249
1250 static size_t crngt_case, crngt_idx;
1251
1252 static int crngt_entropy_cb(unsigned char *buf)
1253 {
1254     size_t i, z;
1255
1256     if (!TEST_int_lt(crngt_idx, crngt_num_cases))
1257         return 0;
1258     /* Generate a block of unique data unless this is the duplication point */
1259     z = crngt_idx++;
1260     if (z > 0 && crngt_case == z)
1261         z--;
1262     for (i = 0; i < CRNGT_BUFSIZ; i++)
1263         buf[i] = (unsigned char)(i + 'A' + z);
1264     return 1;
1265 }
1266
1267 static int test_crngt(int n)
1268 {
1269     const struct s_drgb_types *dt = drgb_types + n / crngt_num_cases;
1270     RAND_DRBG *drbg = NULL;
1271     unsigned char buff[100];
1272     size_t ent;
1273     int res = 0;
1274     int expect;
1275
1276     if (!TEST_true(rand_crngt_single_init()))
1277         return 0;
1278     rand_crngt_cleanup();
1279
1280     if (!TEST_ptr(drbg = RAND_DRBG_new(dt->nid, dt->flags, NULL)))
1281         return 0;
1282     ent = (drbg->min_entropylen + CRNGT_BUFSIZ - 1) / CRNGT_BUFSIZ;
1283     crngt_case = n % crngt_num_cases;
1284     crngt_idx = 0;
1285     crngt_get_entropy = &crngt_entropy_cb;
1286     if (!TEST_true(rand_crngt_init()))
1287         goto err;
1288 #ifndef FIPS_MODE
1289     if (!TEST_true(RAND_DRBG_set_callbacks(drbg, &rand_crngt_get_entropy,
1290                                            &rand_crngt_cleanup_entropy,
1291                                            &rand_drbg_get_nonce,
1292                                            &rand_drbg_cleanup_nonce)))
1293         goto err;
1294 #endif
1295     expect = crngt_case == 0 || crngt_case > ent;
1296     if (!TEST_int_eq(RAND_DRBG_instantiate(drbg, NULL, 0), expect))
1297         goto err;
1298     if (!expect)
1299         goto fin;
1300     if (!TEST_true(RAND_DRBG_generate(drbg, buff, sizeof(buff), 0, NULL, 0)))
1301         goto err;
1302
1303     expect = crngt_case == 0 || crngt_case > 2 * ent;
1304     if (!TEST_int_eq(RAND_DRBG_reseed(drbg, NULL, 0, 0), expect))
1305         goto err;
1306     if (!expect)
1307         goto fin;
1308     if (!TEST_true(RAND_DRBG_generate(drbg, buff, sizeof(buff), 0, NULL, 0)))
1309         goto err;
1310
1311 fin:
1312     res = 1;
1313 err:
1314     if (!res)
1315         TEST_note("DRBG %zd case %zd block %zd", n / crngt_num_cases,
1316                   crngt_case, crngt_idx);
1317     uninstantiate(drbg);
1318     RAND_DRBG_free(drbg);
1319     crngt_get_entropy = &rand_crngt_get_entropy_cb;
1320     return res;
1321 }
1322
1323 int setup_tests(void)
1324 {
1325     app_data_index = RAND_DRBG_get_ex_new_index(0L, NULL, NULL, NULL, NULL);
1326
1327     ADD_ALL_TESTS(test_kats, OSSL_NELEM(drbg_test));
1328     ADD_ALL_TESTS(test_error_checks, OSSL_NELEM(drbg_test));
1329     ADD_TEST(test_rand_drbg_reseed);
1330     ADD_TEST(test_rand_seed);
1331     ADD_TEST(test_rand_add);
1332     ADD_TEST(test_rand_drbg_prediction_resistance);
1333     ADD_TEST(test_multi_set);
1334     ADD_TEST(test_set_defaults);
1335 #if defined(OPENSSL_THREADS)
1336     ADD_TEST(test_multi_thread);
1337 #endif
1338     ADD_ALL_TESTS(test_crngt, crngt_num_cases * OSSL_NELEM(drgb_types));
1339     return 1;
1340 }