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/*
* Copyright 2011-2017 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <string.h>
#include "internal/nelem.h"
#include <openssl/crypto.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include <openssl/obj_mac.h>
#include <openssl/evp.h>
#include <openssl/aes.h>
#include "../crypto/rand/rand_lcl.h"
#include "testutil.h"
#include "drbgtest.h"
typedef struct drbg_selftest_data_st {
int post;
int nid;
unsigned int flags;
/* KAT data for no PR */
const unsigned char *entropy;
size_t entropylen;
const unsigned char *nonce;
size_t noncelen;
const unsigned char *pers;
size_t perslen;
const unsigned char *adin;
size_t adinlen;
const unsigned char *entropyreseed;
size_t entropyreseedlen;
const unsigned char *adinreseed;
size_t adinreseedlen;
const unsigned char *adin2;
size_t adin2len;
const unsigned char *expected;
size_t exlen;
const unsigned char *kat2;
size_t kat2len;
/* KAT data for PR */
const unsigned char *entropy_pr;
size_t entropylen_pr;
const unsigned char *nonce_pr;
size_t noncelen_pr;
const unsigned char *pers_pr;
size_t perslen_pr;
const unsigned char *adin_pr;
size_t adinlen_pr;
const unsigned char *entropypr_pr;
size_t entropyprlen_pr;
const unsigned char *ading_pr;
size_t adinglen_pr;
const unsigned char *entropyg_pr;
size_t entropyglen_pr;
const unsigned char *kat_pr;
size_t katlen_pr;
const unsigned char *kat2_pr;
size_t kat2len_pr;
} DRBG_SELFTEST_DATA;
#define make_drbg_test_data(nid, flag, pr, post) {\
post, nid, flag, \
pr##_entropyinput, sizeof(pr##_entropyinput), \
pr##_nonce, sizeof(pr##_nonce), \
pr##_personalizationstring, sizeof(pr##_personalizationstring), \
pr##_additionalinput, sizeof(pr##_additionalinput), \
pr##_entropyinputreseed, sizeof(pr##_entropyinputreseed), \
pr##_additionalinputreseed, sizeof(pr##_additionalinputreseed), \
pr##_additionalinput2, sizeof(pr##_additionalinput2), \
pr##_int_returnedbits, sizeof(pr##_int_returnedbits), \
pr##_returnedbits, sizeof(pr##_returnedbits), \
pr##_pr_entropyinput, sizeof(pr##_pr_entropyinput), \
pr##_pr_nonce, sizeof(pr##_pr_nonce), \
pr##_pr_personalizationstring, sizeof(pr##_pr_personalizationstring), \
pr##_pr_additionalinput, sizeof(pr##_pr_additionalinput), \
pr##_pr_entropyinputpr, sizeof(pr##_pr_entropyinputpr), \
pr##_pr_additionalinput2, sizeof(pr##_pr_additionalinput2), \
pr##_pr_entropyinputpr2, sizeof(pr##_pr_entropyinputpr2), \
pr##_pr_int_returnedbits, sizeof(pr##_pr_int_returnedbits), \
pr##_pr_returnedbits, sizeof(pr##_pr_returnedbits) \
}
#define make_drbg_test_data_df(nid, pr, p) \
make_drbg_test_data(nid, RAND_DRBG_FLAG_CTR_USE_DF, pr, p)
static DRBG_SELFTEST_DATA drbg_test[] = {
make_drbg_test_data (NID_aes_128_ctr, 0, aes_128_no_df, 0),
make_drbg_test_data (NID_aes_192_ctr, 0, aes_192_no_df, 0),
make_drbg_test_data (NID_aes_256_ctr, 0, aes_256_no_df, 1),
make_drbg_test_data_df(NID_aes_128_ctr, aes_128_use_df, 0),
make_drbg_test_data_df(NID_aes_192_ctr, aes_192_use_df, 0),
make_drbg_test_data_df(NID_aes_256_ctr, aes_256_use_df, 1),
};
static int app_data_index;
/*
* Test context data, attached as EXDATA to the RAND_DRBG
*/
typedef struct test_ctx_st {
const unsigned char *entropy;
size_t entropylen;
int entropycnt;
const unsigned char *nonce;
size_t noncelen;
int noncecnt;
} TEST_CTX;
static size_t kat_entropy(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len)
{
TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
t->entropycnt++;
*pout = (unsigned char *)t->entropy;
return t->entropylen;
}
static size_t kat_nonce(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len)
{
TEST_CTX *t = (TEST_CTX *)RAND_DRBG_get_ex_data(drbg, app_data_index);
t->noncecnt++;
*pout = (unsigned char *)t->nonce;
return t->noncelen;
}
static int uninstantiate(RAND_DRBG *drbg)
{
int ret = drbg == NULL ? 1 : RAND_DRBG_uninstantiate(drbg);
ERR_clear_error();
return ret;
}
/*
* Do a single KAT test. Return 0 on failure.
*/
static int single_kat(DRBG_SELFTEST_DATA *td)
{
RAND_DRBG *drbg = NULL;
TEST_CTX t;
int failures = 0;
unsigned char buff[1024];
/*
* Test without PR: Instantiate DRBG with test entropy, nonce and
* personalisation string.
*/
if (!TEST_ptr(drbg = RAND_DRBG_new(td->nid, td->flags, NULL)))
return 0;
if (!TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL))) {
failures++;
goto err;
}
memset(&t, 0, sizeof(t));
t.entropy = td->entropy;
t.entropylen = td->entropylen;
t.nonce = td->nonce;
t.noncelen = td->noncelen;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers, td->perslen))
|| !TEST_true(RAND_DRBG_generate(drbg, buff, td->exlen, 0,
td->adin, td->adinlen))
|| !TEST_mem_eq(td->expected, td->exlen, buff, td->exlen))
failures++;
/* Reseed DRBG with test entropy and additional input */
t.entropy = td->entropyreseed;
t.entropylen = td->entropyreseedlen;
if (!TEST_true(RAND_DRBG_reseed(drbg, td->adinreseed, td->adinreseedlen)
|| !TEST_true(RAND_DRBG_generate(drbg, buff, td->kat2len, 0,
td->adin2, td->adin2len))
|| !TEST_mem_eq(td->kat2, td->kat2len, buff, td->kat2len)))
failures++;
uninstantiate(drbg);
/*
* Now test with PR: Instantiate DRBG with test entropy, nonce and
* personalisation string.
*/
if (!TEST_true(RAND_DRBG_set(drbg, td->nid, td->flags))
|| !TEST_true(RAND_DRBG_set_callbacks(drbg, kat_entropy, NULL,
kat_nonce, NULL)))
failures++;
RAND_DRBG_set_ex_data(drbg, app_data_index, &t);
t.entropy = td->entropy_pr;
t.entropylen = td->entropylen_pr;
t.nonce = td->nonce_pr;
t.noncelen = td->noncelen_pr;
t.entropycnt = 0;
t.noncecnt = 0;
if (!TEST_true(RAND_DRBG_instantiate(drbg, td->pers_pr, td->perslen_pr)))
failures++;
/*
* Now generate with PR: we need to supply entropy as this will
* perform a reseed operation.
*/
t.entropy = td->entropypr_pr;
t.entropylen = td->entropyprlen_pr;
if (!TEST_true(RAND_DRBG_generate(drbg, buff, td->katlen_pr, 1,
td->adin_pr, td->adinlen_pr))
|| !TEST_mem_eq(td->kat_pr, td->katlen_pr
|