fips/rand/fips_drbg_selftest.c

   1 /* fips/rand/fips_drbg_selftest.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  */
  53
  54 #define OPENSSL_FIPSAPI
  55
  56 #include <string.h>
  57 #include <openssl/crypto.h>
  58 #include <openssl/err.h>
  59 #include <openssl/fips_rand.h>
  60 #include "fips_rand_lcl.h"
  61 #include "fips_locl.h"
  62
  63 #include "fips_drbg_selftest.h"
  64
  65 typedef struct {
  66         int post;
  67         int nid;
  68         unsigned int flags;
  69
  70         /* KAT data for no PR */
  71         const unsigned char *ent;
  72         size_t entlen;
  73         const unsigned char *nonce;
  74         size_t noncelen;
  75         const unsigned char *pers;
  76         size_t perslen;
  77         const unsigned char *adin;
  78         size_t adinlen;
  79         const unsigned char *entreseed;
  80         size_t entreseedlen;
  81         const unsigned char *adinreseed;
  82         size_t adinreseedlen;
  83         const unsigned char *adin2;
  84         size_t adin2len;
  85         const unsigned char *kat;
  86         size_t katlen;
  87         const unsigned char *kat2;
  88         size_t kat2len;
  89
  90         /* KAT data for PR */
  91         const unsigned char *ent_pr;
  92         size_t entlen_pr;
  93         const unsigned char *nonce_pr;
  94         size_t noncelen_pr;
  95         const unsigned char *pers_pr;
  96         size_t perslen_pr;
  97         const unsigned char *adin_pr;
  98         size_t adinlen_pr;
  99         const unsigned char *entpr_pr;
 100         size_t entprlen_pr;
 101         const unsigned char *ading_pr;
 102         size_t adinglen_pr;
 103         const unsigned char *entg_pr;
 104         size_t entglen_pr;
 105         const unsigned char *kat_pr;
 106         size_t katlen_pr;
 107         const unsigned char *kat2_pr;
 108         size_t kat2len_pr;
 109
 110         } DRBG_SELFTEST_DATA;
 111
 112 #define make_drbg_test_data(nid, flag, pr, p) {p, nid, flag | DRBG_FLAG_TEST, \
 113         pr##_entropyinput, sizeof(pr##_entropyinput), \
 114         pr##_nonce, sizeof(pr##_nonce), \
 115         pr##_personalizationstring, sizeof(pr##_personalizationstring), \
 116         pr##_additionalinput, sizeof(pr##_additionalinput), \
 117         pr##_entropyinputreseed, sizeof(pr##_entropyinputreseed), \
 118         pr##_additionalinputreseed, sizeof(pr##_additionalinputreseed), \
 119         pr##_additionalinput2, sizeof(pr##_additionalinput2), \
 120         pr##_int_returnedbits, sizeof(pr##_int_returnedbits), \
 121         pr##_returnedbits, sizeof(pr##_returnedbits), \
 122         pr##_pr_entropyinput, sizeof(pr##_pr_entropyinput), \
 123         pr##_pr_nonce, sizeof(pr##_pr_nonce), \
 124         pr##_pr_personalizationstring, sizeof(pr##_pr_personalizationstring), \
 125         pr##_pr_additionalinput, sizeof(pr##_pr_additionalinput), \
 126         pr##_pr_entropyinputpr, sizeof(pr##_pr_entropyinputpr), \
 127         pr##_pr_additionalinput2, sizeof(pr##_pr_additionalinput2), \
 128         pr##_pr_entropyinputpr2, sizeof(pr##_pr_entropyinputpr2), \
 129         pr##_pr_int_returnedbits, sizeof(pr##_pr_int_returnedbits), \
 130         pr##_pr_returnedbits, sizeof(pr##_pr_returnedbits), \
 131         }
 132
 133 #define make_drbg_test_data_df(nid, pr, p) \
 134         make_drbg_test_data(nid, DRBG_FLAG_CTR_USE_DF, pr, p)
 135
 136 #define make_drbg_test_data_ec(curve, md, pr, p) \
 137         make_drbg_test_data((curve << 16) | md , 0, pr, p)
 138
 139 static DRBG_SELFTEST_DATA drbg_test[] = {
 140         make_drbg_test_data_df(NID_aes_128_ctr, aes_128_use_df, 0),
 141         make_drbg_test_data_df(NID_aes_192_ctr, aes_192_use_df, 0),
 142         make_drbg_test_data_df(NID_aes_256_ctr, aes_256_use_df, 1),
 143         make_drbg_test_data(NID_aes_128_ctr, 0, aes_128_no_df, 0),
 144         make_drbg_test_data(NID_aes_192_ctr, 0, aes_192_no_df, 0),
 145         make_drbg_test_data(NID_aes_256_ctr, 0, aes_256_no_df, 1),
 146         make_drbg_test_data(NID_sha1, 0, sha1, 0),
 147         make_drbg_test_data(NID_sha224, 0, sha224, 0),
 148         make_drbg_test_data(NID_sha256, 0, sha256, 1),
 149         make_drbg_test_data(NID_sha384, 0, sha384, 0),
 150         make_drbg_test_data(NID_sha512, 0, sha512, 0),
 151         make_drbg_test_data(NID_hmacWithSHA1, 0, hmac_sha1, 0),
 152         make_drbg_test_data(NID_hmacWithSHA224, 0, hmac_sha224, 0),
 153         make_drbg_test_data(NID_hmacWithSHA256, 0, hmac_sha256, 1),
 154         make_drbg_test_data(NID_hmacWithSHA384, 0, hmac_sha384, 0),
 155         make_drbg_test_data(NID_hmacWithSHA512, 0, hmac_sha512, 0),
 156         make_drbg_test_data_ec(NID_X9_62_prime256v1, NID_sha1, p_256_sha1, 0),
 157         make_drbg_test_data_ec(NID_X9_62_prime256v1, NID_sha224, p_256_sha224, 0),
 158         make_drbg_test_data_ec(NID_X9_62_prime256v1, NID_sha256, p_256_sha256, 1),
 159         make_drbg_test_data_ec(NID_X9_62_prime256v1, NID_sha384, p_256_sha384, 0),
 160         make_drbg_test_data_ec(NID_X9_62_prime256v1, NID_sha512, p_256_sha512, 0),
 161         make_drbg_test_data_ec(NID_secp384r1, NID_sha224, p_384_sha224, 0),
 162         make_drbg_test_data_ec(NID_secp384r1, NID_sha256, p_384_sha256, 0),
 163         make_drbg_test_data_ec(NID_secp384r1, NID_sha384, p_384_sha384, 0),
 164         make_drbg_test_data_ec(NID_secp384r1, NID_sha512, p_384_sha512, 0),
 165         make_drbg_test_data_ec(NID_secp521r1, NID_sha256, p_521_sha256, 0),
 166         make_drbg_test_data_ec(NID_secp521r1, NID_sha384, p_521_sha384, 0),
 167         make_drbg_test_data_ec(NID_secp521r1, NID_sha512, p_521_sha512, 0),
 168         {0,0,0}
 169         };
 170
 171 typedef struct
 172         {
 173         const unsigned char *ent;
 174         size_t entlen;
 175         int entcnt;
 176         const unsigned char *nonce;
 177         size_t noncelen;
 178         int noncecnt;
 179         } TEST_ENT;
 180
 181 static size_t test_entropy(DRBG_CTX *dctx, unsigned char **pout,
 182                                 int entropy, size_t min_len, size_t max_len)
 183         {
 184         TEST_ENT *t = FIPS_drbg_get_app_data(dctx);
 185         *pout = (unsigned char *)t->ent;
 186         t->entcnt++;
 187         return t->entlen;
 188         }
 189
 190 static size_t test_nonce(DRBG_CTX *dctx, unsigned char **pout,
 191                                 int entropy, size_t min_len, size_t max_len)
 192         {
 193         TEST_ENT *t = FIPS_drbg_get_app_data(dctx);
 194         *pout = (unsigned char *)t->nonce;
 195         t->noncecnt++;
 196         return t->noncelen;
 197         }
 198
 199 static int fips_drbg_single_kat(DRBG_CTX *dctx, DRBG_SELFTEST_DATA *td,
 200                                                                 int quick)
 201         {
 202         TEST_ENT t;
 203         int rv = 0;
 204         size_t adinlen;
 205         unsigned char randout[1024];
 206
 207         /* Initial test without PR */
 208
 209         if (!FIPS_drbg_init(dctx, td->nid, td->flags))
 210                 return 0;
 211         if (!FIPS_drbg_set_callbacks(dctx, test_entropy, 0, 0, test_nonce, 0))
 212                 return 0;
 213
 214         FIPS_drbg_set_app_data(dctx, &t);
 215
 216         t.ent = td->ent;
 217         t.entlen = td->entlen;
 218         t.nonce = td->nonce;
 219         t.noncelen = td->noncelen;
 220         t.entcnt = 0;
 221         t.noncecnt = 0;
 222
 223         if (!FIPS_drbg_instantiate(dctx, td->pers, td->perslen))
 224                 goto err;
 225
 226         /* Note for CTR without DF some additional input values
 227          * ignore bytes after the keylength: so reduce adinlen
 228          * to half to ensure invalid data is fed in.
 229          */
 230         if (!fips_post_corrupt(FIPS_TEST_DRBG, dctx->type, &dctx->iflags))
 231                 adinlen = td->adinlen / 2;
 232         else
 233                 adinlen = td->adinlen;
 234         if (!FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 235                                 td->adin, adinlen))
 236                 goto err;
 237
 238         if (memcmp(randout, td->kat, td->katlen))
 239                 {
 240                 FIPSerr(FIPS_F_FIPS_DRBG_SINGLE_KAT, FIPS_R_NOPR_TEST1_FAILURE);
 241                 goto err2;
 242                 }
 243
 244         if (quick)
 245                 {
 246                 rv = 1;
 247                 goto err;
 248                 }
 249
 250         t.ent = td->entreseed;
 251         t.entlen = td->entreseedlen;
 252
 253         if (!FIPS_drbg_reseed(dctx, td->adinreseed, td->adinreseedlen))
 254                 goto err;
 255
 256         if (!FIPS_drbg_generate(dctx, randout, td->kat2len, 0,
 257                                 td->adin2, td->adin2len))
 258                 goto err;
 259
 260         if (memcmp(randout, td->kat2, td->kat2len))
 261                 {
 262                 FIPSerr(FIPS_F_FIPS_DRBG_SINGLE_KAT, FIPS_R_NOPR_TEST2_FAILURE);
 263                 goto err2;
 264                 }
 265
 266         FIPS_drbg_uninstantiate(dctx);
 267
 268         /* Now test with PR */
 269         if (!FIPS_drbg_init(dctx, td->nid, td->flags))
 270                 return 0;
 271         if (!FIPS_drbg_set_callbacks(dctx, test_entropy, 0, 0, test_nonce, 0))
 272                 return 0;
 273
 274         FIPS_drbg_set_app_data(dctx, &t);
 275
 276         t.ent = td->ent_pr;
 277         t.entlen = td->entlen_pr;
 278         t.nonce = td->nonce_pr;
 279         t.noncelen = td->noncelen_pr;
 280         t.entcnt = 0;
 281         t.noncecnt = 0;
 282
 283         if (!FIPS_drbg_instantiate(dctx, td->pers_pr, td->perslen_pr))
 284                 goto err;
 285
 286         t.ent = td->entpr_pr;
 287         t.entlen = td->entprlen_pr;
 288
 289         /* Note for CTR without DF some additional input values
 290          * ignore bytes after the keylength: so reduce adinlen
 291          * to half to ensure invalid data is fed in.
 292          */
 293         if (!fips_post_corrupt(FIPS_TEST_DRBG, dctx->type, &dctx->iflags))
 294                 adinlen = td->adinlen_pr / 2;
 295         else
 296                 adinlen = td->adinlen_pr;
 297         if (!FIPS_drbg_generate(dctx, randout, td->katlen_pr, 1,
 298                                 td->adin_pr, adinlen))
 299                 goto err;
 300
 301         if (memcmp(randout, td->kat_pr, td->katlen_pr))
 302                 {
 303                 FIPSerr(FIPS_F_FIPS_DRBG_SINGLE_KAT, FIPS_R_PR_TEST1_FAILURE);
 304                 goto err2;
 305                 }
 306
 307         t.ent = td->entg_pr;
 308         t.entlen = td->entglen_pr;
 309
 310         if (!FIPS_drbg_generate(dctx, randout, td->kat2len_pr, 1,
 311                                 td->ading_pr, td->adinglen_pr))
 312                 goto err;
 313
 314         if (memcmp(randout, td->kat2_pr, td->kat2len_pr))
 315                 {
 316                 FIPSerr(FIPS_F_FIPS_DRBG_SINGLE_KAT, FIPS_R_PR_TEST2_FAILURE);
 317                 goto err2;
 318                 }
 319
 320         rv = 1;
 321
 322         err:
 323         if (rv == 0)
 324                 FIPSerr(FIPS_F_FIPS_DRBG_SINGLE_KAT, FIPS_R_SELFTEST_FAILED);
 325         err2:
 326         FIPS_drbg_uninstantiate(dctx);
 327
 328         return rv;
 329
 330         }
 331
 332 /* Initialise a DRBG based on selftest data */
 333
 334 static int do_drbg_init(DRBG_CTX *dctx, DRBG_SELFTEST_DATA *td, TEST_ENT *t)
 335         {
 336
 337         if (!FIPS_drbg_init(dctx, td->nid, td->flags))
 338                 return 0;
 339
 340         if (!FIPS_drbg_set_callbacks(dctx, test_entropy, 0, 0, test_nonce, 0))
 341                 return 0;
 342
 343         FIPS_drbg_set_app_data(dctx, t);
 344
 345         t->ent = td->ent;
 346         t->entlen = td->entlen;
 347         t->nonce = td->nonce;
 348         t->noncelen = td->noncelen;
 349         t->entcnt = 0;
 350         t->noncecnt = 0;
 351         return 1;
 352         }
 353
 354 /* Initialise and instantiate DRBG based on selftest data */
 355 static int do_drbg_instantiate(DRBG_CTX *dctx, DRBG_SELFTEST_DATA *td,
 356                                                                 TEST_ENT *t)
 357         {
 358         if (!do_drbg_init(dctx, td, t))
 359                 return 0;
 360         if (!FIPS_drbg_instantiate(dctx, td->pers, td->perslen))
 361                 return 0;
 362
 363         return 1;
 364         }
 365
 366 /* This is the "health check" function required by SP800-90. Induce several
 367  * failure modes and check an error condition is set.
 368  */
 369
 370 static int fips_drbg_health_check(DRBG_CTX *dctx, DRBG_SELFTEST_DATA *td)
 371         {
 372         unsigned char randout[1024];
 373         TEST_ENT t;
 374         size_t i;
 375         unsigned int reseed_counter_tmp;
 376         unsigned char *p = (unsigned char *)dctx;
 377
 378         /* Initialise DRBG */
 379
 380         if (!do_drbg_init(dctx, td, &t))
 381                 goto err;
 382
 383         /* Don't report induced errors */
 384         dctx->iflags |= DRBG_FLAG_NOERR;
 385
 386         /* Personalisation string tests */
 387
 388         /* Test detection of too large personlisation string */
 389
 390         if (FIPS_drbg_instantiate(dctx, td->pers, dctx->max_pers + 1) > 0)
 391                 {
 392                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_PERSONALISATION_ERROR_UNDETECTED);
 393                 goto err;
 394                 }
 395
 396         /* Entropy source tests */
 397
 398         /* Test entropy source failure detecion: i.e. returns no data */
 399
 400         t.entlen = 0;
 401
 402         if (FIPS_drbg_instantiate(dctx, td->pers, td->perslen) > 0)
 403                 {
 404                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 405                 goto err;
 406                 }
 407
 408         /* Try to generate output from uninstantiated DRBG */
 409         if (FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 410                                 td->adin, td->adinlen))
 411                 {
 412                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_GENERATE_ERROR_UNDETECTED);
 413                 goto err;
 414                 }
 415
 416         dctx->iflags &= ~DRBG_FLAG_NOERR;
 417         if (!FIPS_drbg_uninstantiate(dctx))
 418                 {
 419                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 420                 goto err;
 421                 }
 422
 423         if (!do_drbg_init(dctx, td, &t))
 424                 goto err;
 425
 426         dctx->iflags |= DRBG_FLAG_NOERR;
 427
 428         /* Test insufficient entropy */
 429
 430         t.entlen = dctx->min_entropy - 1;
 431
 432         if (FIPS_drbg_instantiate(dctx, td->pers, td->perslen) > 0)
 433                 {
 434                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 435                 goto err;
 436                 }
 437
 438         dctx->iflags &= ~DRBG_FLAG_NOERR;
 439         if (!FIPS_drbg_uninstantiate(dctx))
 440                 {
 441                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 442                 goto err;
 443                 }
 444
 445         /* Test too much entropy */
 446
 447         if (!do_drbg_init(dctx, td, &t))
 448                 goto err;
 449
 450         dctx->iflags |= DRBG_FLAG_NOERR;
 451
 452         t.entlen = dctx->max_entropy + 1;
 453
 454         if (FIPS_drbg_instantiate(dctx, td->pers, td->perslen) > 0)
 455                 {
 456                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 457                 goto err;
 458                 }
 459
 460         dctx->iflags &= ~DRBG_FLAG_NOERR;
 461         if (!FIPS_drbg_uninstantiate(dctx))
 462                 {
 463                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 464                 goto err;
 465                 }
 466
 467         /* Nonce tests */
 468
 469         /* Test too small nonce */
 470
 471         if (dctx->min_nonce)
 472                 {
 473
 474                 if (!do_drbg_init(dctx, td, &t))
 475                         goto err;
 476
 477                 dctx->iflags |= DRBG_FLAG_NOERR;
 478
 479                 t.noncelen = dctx->min_nonce - 1;
 480
 481                 if (FIPS_drbg_instantiate(dctx, td->pers, td->perslen) > 0)
 482                         {
 483                         FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_NONCE_ERROR_UNDETECTED);
 484                         goto err;
 485                         }
 486
 487                 dctx->iflags &= ~DRBG_FLAG_NOERR;
 488                 if (!FIPS_drbg_uninstantiate(dctx))
 489                         {
 490                         FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 491                         goto err;
 492                         }
 493
 494                 }
 495
 496         /* Test too large nonce */
 497
 498         if (dctx->max_nonce)
 499                 {
 500
 501                 if (!do_drbg_init(dctx, td, &t))
 502                         goto err;
 503
 504                 dctx->iflags |= DRBG_FLAG_NOERR;
 505
 506                 t.noncelen = dctx->max_nonce + 1;
 507
 508                 if (FIPS_drbg_instantiate(dctx, td->pers, td->perslen) > 0)
 509                         {
 510                         FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_NONCE_ERROR_UNDETECTED);
 511                         goto err;
 512                         }
 513
 514                 dctx->iflags &= ~DRBG_FLAG_NOERR;
 515                 if (!FIPS_drbg_uninstantiate(dctx))
 516                         {
 517                         FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 518                         goto err;
 519                         }
 520
 521                 }
 522
 523         /* Instantiate with valid data. */
 524         if (!do_drbg_instantiate(dctx, td, &t))
 525                         goto err;
 526
 527         /* Check generation is now OK */
 528         if (!FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 529                                 td->adin, td->adinlen))
 530                 goto err;
 531
 532         dctx->iflags |= DRBG_FLAG_NOERR;
 533
 534         /* Request too much data for one request */
 535         if (FIPS_drbg_generate(dctx, randout, dctx->max_request + 1, 0,
 536                                 td->adin, td->adinlen))
 537                 {
 538                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_REQUEST_LENGTH_ERROR_UNDETECTED);
 539                 goto err;
 540                 }
 541
 542         /* Try too large additional input */
 543         if (FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 544                                 td->adin, dctx->max_adin + 1))
 545                 {
 546                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ADDITIONAL_INPUT_ERROR_UNDETECTED);
 547                 goto err;
 548                 }
 549
 550         /* Check prediction resistance request fails if entropy source
 551          * failure.
 552          */
 553
 554         t.entlen = 0;
 555
 556         if (FIPS_drbg_generate(dctx, randout, td->katlen, 1,
 557                                 td->adin, td->adinlen))
 558                 {
 559                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 560                 goto err;
 561                 }
 562
 563         dctx->iflags &= ~DRBG_FLAG_NOERR;
 564
 565         if (!FIPS_drbg_uninstantiate(dctx))
 566                 {
 567                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 568                 goto err;
 569                 }
 570
 571
 572         /* Instantiate again with valid data */
 573
 574         if (!do_drbg_instantiate(dctx, td, &t))
 575                         goto err;
 576         /* Test reseed counter works */
 577         /* Save initial reseed counter */
 578         reseed_counter_tmp = dctx->reseed_counter;
 579         /* Set reseed counter to beyond interval */
 580         dctx->reseed_counter = dctx->reseed_interval;
 581
 582         /* Generate output and check entropy has been requested for reseed */
 583         t.entcnt = 0;
 584         if (!FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 585                                 td->adin, td->adinlen))
 586                 goto err;
 587         if (t.entcnt != 1)
 588                 {
 589                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_NOT_REQUESTED_FOR_RESEED);
 590                 goto err;
 591                 }
 592         /* Check reseed counter has been reset */
 593         if (dctx->reseed_counter != reseed_counter_tmp + 1)
 594                 {
 595                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_RESEED_COUNTER_ERROR);
 596                 goto err;
 597                 }
 598
 599         /* Explicit reseed tests */
 600
 601         /* Test explicit reseed with too large additional input */
 602         if (!do_drbg_init(dctx, td, &t))
 603                 goto err;
 604
 605         dctx->iflags |= DRBG_FLAG_NOERR;
 606
 607         if (FIPS_drbg_reseed(dctx, td->adin, dctx->max_adin + 1) > 0)
 608                 {
 609                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ADDITIONAL_INPUT_ERROR_UNDETECTED);
 610                 goto err;
 611                 }
 612
 613         /* Test explicit reseed with entropy source failure */
 614
 615         /* Check prediction resistance request fails if entropy source
 616          * failure.
 617          */
 618
 619         t.entlen = 0;
 620
 621         if (FIPS_drbg_generate(dctx, randout, td->katlen, 1,
 622                                 td->adin, td->adinlen))
 623                 {
 624                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 625                 goto err;
 626                 }
 627
 628         dctx->iflags &= ~DRBG_FLAG_NOERR;
 629
 630         if (!FIPS_drbg_uninstantiate(dctx))
 631                 {
 632                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 633                 goto err;
 634                 }
 635
 636
 637         if (!do_drbg_instantiate(dctx, td, &t))
 638                         goto err;
 639         /* Test reseed counter works */
 640         /* Save initial reseed counter */
 641         reseed_counter_tmp = dctx->reseed_counter;
 642         /* Set reseed counter to beyond interval */
 643         dctx->reseed_counter = dctx->reseed_interval;
 644
 645         /* Generate output and check entropy has been requested for reseed */
 646         t.entcnt = 0;
 647         if (!FIPS_drbg_generate(dctx, randout, td->katlen, 0,
 648                                 td->adin, td->adinlen))
 649                 goto err;
 650         if (t.entcnt != 1)
 651                 {
 652                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_NOT_REQUESTED_FOR_RESEED);
 653                 goto err;
 654                 }
 655         /* Check reseed counter has been reset */
 656         if (dctx->reseed_counter != reseed_counter_tmp + 1)
 657                 {
 658                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_RESEED_COUNTER_ERROR);
 659                 goto err;
 660                 }
 661
 662         /* Explicit reseed tests */
 663
 664         /* Test explicit reseed with too large additional input */
 665         if (!do_drbg_init(dctx, td, &t))
 666                 goto err;
 667
 668         dctx->iflags |= DRBG_FLAG_NOERR;
 669
 670         if (FIPS_drbg_reseed(dctx, td->adin, dctx->max_adin + 1) > 0)
 671                 {
 672                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ADDITIONAL_INPUT_ERROR_UNDETECTED);
 673                 goto err;
 674                 }
 675
 676         /* Test explicit reseed with entropy source failure */
 677
 678         if (!do_drbg_init(dctx, td, &t))
 679                 goto err;
 680
 681         dctx->iflags |= DRBG_FLAG_NOERR;
 682
 683         t.entlen = 0;
 684
 685         if (FIPS_drbg_reseed(dctx, td->adin, td->adinlen) > 0)
 686                 {
 687                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 688                 goto err;
 689                 }
 690
 691         if (!FIPS_drbg_uninstantiate(dctx))
 692                 {
 693                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 694                 goto err;
 695                 }
 696
 697         /* Test explicit reseed with too much entropy */
 698
 699         if (!do_drbg_init(dctx, td, &t))
 700                 goto err;
 701
 702         dctx->iflags |= DRBG_FLAG_NOERR;
 703
 704         t.entlen = dctx->max_entropy + 1;
 705
 706         if (FIPS_drbg_reseed(dctx, td->adin, td->adinlen) > 0)
 707                 {
 708                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 709                 goto err;
 710                 }
 711
 712         if (!FIPS_drbg_uninstantiate(dctx))
 713                 {
 714                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 715                 goto err;
 716                 }
 717
 718         /* Test explicit reseed with too little entropy */
 719
 720         if (!do_drbg_init(dctx, td, &t))
 721                 goto err;
 722
 723         dctx->iflags |= DRBG_FLAG_NOERR;
 724
 725         t.entlen = dctx->min_entropy - 1;
 726
 727         if (FIPS_drbg_reseed(dctx, td->adin, td->adinlen) > 0)
 728                 {
 729                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_ENTROPY_ERROR_UNDETECTED);
 730                 goto err;
 731                 }
 732
 733         if (!FIPS_drbg_uninstantiate(dctx))
 734                 {
 735                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ERROR);
 736                 goto err;
 737                 }
 738
 739         p = (unsigned char *)&dctx->d;
 740         /* Standard says we have to check uninstantiate really zeroes
 741          * the data...
 742          */
 743         for (i = 0; i < sizeof(dctx->d); i++)
 744                 {
 745                 if (*p != 0)
 746                         {
 747                         FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_UNINSTANTIATE_ZEROISE_ERROR);
 748                         goto err;
 749                         }
 750                 p++;
 751                 }
 752
 753         return 1;
 754
 755         err:
 756         /* A real error as opposed to an induced one: underlying function will
 757          * indicate the error.
 758          */
 759         if (!(dctx->iflags & DRBG_FLAG_NOERR))
 760                 FIPSerr(FIPS_F_FIPS_DRBG_HEALTH_CHECK, FIPS_R_FUNCTION_ERROR);
 761         FIPS_drbg_uninstantiate(dctx);
 762         return 0;
 763
 764         }
 765
 766 int fips_drbg_kat(DRBG_CTX *dctx, int nid, unsigned int flags)
 767         {
 768         int rv;
 769         DRBG_SELFTEST_DATA *td;
 770         flags |= DRBG_FLAG_TEST;
 771         for (td = drbg_test; td->nid != 0; td++)
 772                 {
 773                 if (td->nid == nid && td->flags == flags)
 774                         {
 775                         rv = fips_drbg_single_kat(dctx, td, 0);
 776                         if (rv <= 0)
 777                                 return rv;
 778                         return fips_drbg_health_check(dctx, td);
 779                         }
 780                 }
 781         return 0;
 782         }
 783
 784 int FIPS_drbg_test(DRBG_CTX *dctx)
 785         {
 786         int rv;
 787         DRBG_CTX *tctx = NULL;
 788         tctx = FIPS_drbg_new(0, 0);
 789         fips_post_started(FIPS_TEST_DRBG, dctx->type, &dctx->xflags);
 790         if (!tctx)
 791                 return 0;
 792         rv = fips_drbg_kat(tctx, dctx->type, dctx->xflags);
 793         if (tctx)
 794                 FIPS_drbg_free(tctx);
 795         if (rv)
 796                 fips_post_success(FIPS_TEST_DRBG, dctx->type, &dctx->xflags);
 797         else
 798                 fips_post_failed(FIPS_TEST_DRBG, dctx->type, &dctx->xflags);
 799         return rv;
 800         }
 801
 802 int FIPS_selftest_drbg(void)
 803         {
 804         DRBG_CTX *dctx;
 805         DRBG_SELFTEST_DATA *td;
 806         int rv = 1;
 807         dctx = FIPS_drbg_new(0, 0);
 808         if (!dctx)
 809                 return 0;
 810         for (td = drbg_test; td->nid != 0; td++)
 811                 {
 812                 if (td->post != 1)
 813                         continue;
 814                 if (!fips_post_started(FIPS_TEST_DRBG, td->nid, &td->flags))
 815                         return 1;
 816                 if (!fips_drbg_single_kat(dctx, td, 1))
 817                         {
 818                         fips_post_failed(FIPS_TEST_DRBG, td->nid, &td->flags);
 819                         rv = 0;
 820                         continue;
 821                         }
 822                 if (!fips_post_success(FIPS_TEST_DRBG, td->nid, &td->flags))
 823                         return 0;
 824                 }
 825         FIPS_drbg_free(dctx);
 826         return rv;
 827         }
 828
 829
 830 int FIPS_selftest_drbg_all(void)
 831         {
 832         DRBG_CTX *dctx;
 833         DRBG_SELFTEST_DATA *td;
 834         int rv = 1;
 835         dctx = FIPS_drbg_new(0, 0);
 836         if (!dctx)
 837                 return 0;
 838         for (td = drbg_test; td->nid != 0; td++)
 839                 {
 840                 if (!fips_post_started(FIPS_TEST_DRBG, td->nid, &td->flags))
 841                         return 1;
 842                 if (!fips_drbg_single_kat(dctx, td, 0))
 843                         {
 844                         fips_post_failed(FIPS_TEST_DRBG, td->nid, &td->flags);
 845                         rv = 0;
 846                         continue;
 847                         }
 848                 if (!fips_drbg_health_check(dctx, td))
 849                         {
 850                         fips_post_failed(FIPS_TEST_DRBG, td->nid, &td->flags);
 851                         rv = 0;
 852                         continue;
 853                         }
 854                 if (!fips_post_success(FIPS_TEST_DRBG, td->nid, &td->flags))
 855                         return 0;
 856                 }
 857         FIPS_drbg_free(dctx);
 858         return rv;
 859         }
 860