test/drbg_extra_test.c

   1 /*
   2  * Copyright 2020 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_local.h"
  19
  20 #include "testutil.h"
  21 #include "drbg_extra_test.h"
  22
  23 static unsigned char zerobuff[32];
  24
  25 static size_t kat_entropy(RAND_DRBG *drbg, unsigned char **pout,
  26                           int entropy, size_t min_len, size_t max_len,
  27                           int prediction_resistance)
  28 {
  29     *pout = zerobuff;
  30     return sizeof(zerobuff);
  31 }
  32
  33 static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
  34                         int entropy, size_t min_len, size_t max_len)
  35 {
  36     *pout = zerobuff;
  37     return sizeof(zerobuff);
  38 }
  39
  40 static int run_extra_kat(const struct drbg_extra_kat *td)
  41 {
  42     unsigned long long i;
  43     RAND_DRBG *drbg = NULL;
  44     unsigned char buff[BUFFSIZE];
  45     unsigned int flags = 0;
  46     int failures = 0;
  47
  48     if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, flags, NULL)))
  49         return 0;
  50
  51     /* Set deterministic entropy callback. */
  52     if (!TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
  53                                            kat_nonce, NULL))) {
  54         failures++;
  55         goto err;
  56     }
  57
  58     /* Set fixed reseed intervall. */
  59     if (!TEST_true(RAND_DRBG_set_reseed_interval(drbg, RESEEDINTERVAL))) {
  60         failures++;
  61         goto err;
  62     }
  63
  64     if (!TEST_true(RAND_DRBG_instantiate(drbg, NULL, 0)))
  65         failures++;
  66
  67     for (i = 0; i < td->ngen; i++) {
  68         if(!TEST_true(RAND_DRBG_generate(drbg, buff, sizeof(buff), 0, NULL,
  69                                          0)))
  70             failures++;
  71     }
  72
  73     if (!TEST_true(RAND_DRBG_uninstantiate(drbg))
  74         || !TEST_mem_eq(td->expected, sizeof(buff), buff, sizeof(buff)))
  75         failures++;
  76
  77 err:
  78     RAND_DRBG_uninstantiate(drbg);
  79     RAND_DRBG_free(drbg);
  80     return failures == 0;
  81 }
  82
  83 static int test_extra_kats(int i)
  84 {
  85     return run_extra_kat(drbg_extra_test[i]);
  86 }
  87
  88 int setup_tests(void)
  89 {
  90     ADD_ALL_TESTS(test_extra_kats, OSSL_NELEM(drbg_extra_test));
  91     return 1;
  92 }