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fips rand: DRBG KAT self test updates to provider model.

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Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/11682)
This commit is contained in:
Pauli 2020-05-20 14:15:04 +10:00
parent 3f078163df
commit 6154f9a7ca
4 changed files with 72 additions and 65 deletions
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7
crypto/rand/drbg_lib.c
View File

@ -7,6 +7,12 @@
* https://www.openssl.org/source/license.html
*/
/*
* RAND_DRBG_set is deprecated for public use, but still ok for
* internal use.
*/
#include "internal/deprecated.h"
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/err.h>
@ -433,6 +439,7 @@ void RAND_DRBG_free(RAND_DRBG *drbg)
return;
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RAND_DRBG, drbg, &drbg->ex_data);
EVP_RAND_CTX_free(drbg->rand);
OPENSSL_free(drbg);
}

2
include/openssl/rand_drbg.h
View File

@ -152,6 +152,8 @@ int RAND_DRBG_set_callback_data(RAND_DRBG *drbg, void *data);
void *RAND_DRBG_get_callback_data(RAND_DRBG *drbg);
int RAND_DRBG_verify_zeroization(RAND_DRBG *drbg);
# ifdef __cplusplus
}
# endif

12
providers/fips/self_test_data.inc
View File

@ -60,7 +60,8 @@ typedef struct st_kat_kdf_st {
typedef struct st_kat_drbg_st {
const char *desc;
const char *algorithm;
int nid;
const char *param_name;
char *param_value;
const unsigned char *entropyin;
size_t entropyinlen;
const unsigned char *nonce;
@ -458,8 +459,7 @@ static const ST_KAT_DRBG st_kat_drbg_tests[] =
{
{
OSSL_SELF_TEST_DESC_DRBG_HASH,
"SHA256",
NID_sha256,
"HASH-DRBG", "digest", "SHA256",
ITM(drbg_hash_sha256_pr_entropyin),
ITM(drbg_hash_sha256_pr_nonce),
ITM(drbg_hash_sha256_pr_persstr),
@ -471,8 +471,7 @@ static const ST_KAT_DRBG st_kat_drbg_tests[] =
},
{
OSSL_SELF_TEST_DESC_DRBG_CTR,
"AES-128",
NID_aes_128_ctr,
"CTR-DRBG", "cipher", "AES-128-CTR",
ITM(drbg_ctr_aes128_pr_df_entropyin),
ITM(drbg_ctr_aes128_pr_df_nonce),
ITM(drbg_ctr_aes128_pr_df_persstr),
@ -484,8 +483,7 @@ static const ST_KAT_DRBG st_kat_drbg_tests[] =
},
{
OSSL_SELF_TEST_DESC_DRBG_HMAC,
"SHA1",
NID_sha1,
"HMAC-DRBG", "digest", "SHA1",
ITM(drbg_hmac_sha1_pr_entropyin),
ITM(drbg_hmac_sha1_pr_nonce),
ITM(drbg_hmac_sha1_pr_persstr),

116
providers/fips/self_test_kats.c
View File

@ -10,17 +10,12 @@
#include <string.h>
#include <openssl/evp.h>
#include <openssl/kdf.h>
#include <openssl/rand_drbg.h>
#include <openssl/core_names.h>
#include <openssl/param_build.h>
#include "internal/cryptlib.h"
#include "internal/nelem.h"
#include "self_test.h"
#include "self_test_data.inc"
#include "../../crypto/rand/rand_local.h"
#define DRBG_PARAM_ENTROPY "DRBG-ENTROPY"
#define DRBG_PARAM_NONCE "DRBG-NONCE"
static int self_test_digest(const ST_KAT_DIGEST *t, OSSL_SELF_TEST *st,
OPENSSL_CTX *libctx)
@ -240,86 +235,90 @@ err:
return ret;
}
static size_t drbg_kat_entropy_cb(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len,
int prediction_resistance)
{
OSSL_PARAM *drbg_params = RAND_DRBG_get_callback_data(drbg);
OSSL_PARAM *p = OSSL_PARAM_locate(drbg_params, DRBG_PARAM_ENTROPY);
if (p == NULL || p->data_type != OSSL_PARAM_OCTET_STRING)
return 0;
*pout = (unsigned char *)p->data;
return p->data_size;
}
static size_t drbg_kat_nonce_cb(RAND_DRBG *drbg, unsigned char **pout,
int entropy, size_t min_len, size_t max_len)
{
OSSL_PARAM *drbg_params = RAND_DRBG_get_callback_data(drbg);
OSSL_PARAM *p = OSSL_PARAM_locate(drbg_params, DRBG_PARAM_NONCE);
if (p == NULL || p->data_type != OSSL_PARAM_OCTET_STRING)
return 0;
*pout = (unsigned char *)p->data;
return p->data_size;
}
static int self_test_drbg(const ST_KAT_DRBG *t, OSSL_SELF_TEST *st,
OPENSSL_CTX *libctx)
{
int ret = 0;
unsigned char out[256];
RAND_DRBG *drbg = NULL;
unsigned int flags = 0;
EVP_RAND *rand;
EVP_RAND_CTX *test = NULL, *drbg = NULL;
unsigned int strength = 256;
int prediction_resistance = 1; /* Causes a reseed */
OSSL_PARAM drbg_params[3] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
static const unsigned char zero[sizeof(drbg->data)] = { 0 };
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_DRBG, t->desc);
if (strcmp(t->desc, OSSL_SELF_TEST_DESC_DRBG_HMAC) == 0)
flags |= RAND_DRBG_FLAG_HMAC;
rand = EVP_RAND_fetch(libctx, "TEST-RAND", NULL);
if (rand == NULL)
goto err;
drbg = RAND_DRBG_new_ex(libctx, t->nid, flags, NULL);
test = EVP_RAND_CTX_new(rand, NULL);
EVP_RAND_free(rand);
if (test == NULL)
goto err;
drbg_params[0] = OSSL_PARAM_construct_uint(OSSL_RAND_PARAM_STRENGTH,
&strength);
if (!EVP_RAND_set_ctx_params(test, drbg_params))
goto err;
rand = EVP_RAND_fetch(libctx, t->algorithm, NULL);
if (rand == NULL)
goto err;
drbg = EVP_RAND_CTX_new(rand, test);
EVP_RAND_free(rand);
if (drbg == NULL)
goto err;
if (!RAND_DRBG_set_callback_data(drbg, drbg_params))
goto err;
strength = EVP_RAND_strength(drbg);
if (!RAND_DRBG_set_callbacks(drbg, drbg_kat_entropy_cb, NULL,
drbg_kat_nonce_cb, NULL))
goto err;
drbg_params[0] =
OSSL_PARAM_construct_octet_string(DRBG_PARAM_ENTROPY,
(void *)t->entropyin, t->entropyinlen);
drbg_params[0] = OSSL_PARAM_construct_utf8_string(t->param_name,
t->param_value, 0);
/* This is only used by HMAC-DRBG but it is ignored by the others */
drbg_params[1] =
OSSL_PARAM_construct_octet_string(DRBG_PARAM_NONCE,
(void *)t->nonce, t->noncelen);
if (!RAND_DRBG_instantiate(drbg, t->persstr, t->persstrlen))
OSSL_PARAM_construct_utf8_string(OSSL_DRBG_PARAM_MAC, "HMAC", 0);
if (!EVP_RAND_set_ctx_params(drbg, drbg_params))
goto err;
drbg_params[0] =
OSSL_PARAM_construct_octet_string(DRBG_PARAM_ENTROPY,
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)t->entropyin,
t->entropyinlen);
drbg_params[1] =
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_NONCE,
(void *)t->nonce, t->noncelen);
if (!EVP_RAND_set_ctx_params(test, drbg_params)
|| !EVP_RAND_instantiate(test, strength, 0, NULL, 0))
goto err;
if (!EVP_RAND_instantiate(drbg, strength, 0, t->persstr, t->persstrlen))
goto err;
drbg_params[0] =
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)t->entropyinpr1,
t->entropyinpr1len);
if (!EVP_RAND_set_ctx_params(test, drbg_params))
goto err;
if (!RAND_DRBG_generate(drbg, out, t->expectedlen, prediction_resistance,
t->entropyaddin1, t->entropyaddin1len))
if (!EVP_RAND_generate(drbg, out, t->expectedlen, strength,
prediction_resistance,
t->entropyaddin1, t->entropyaddin1len))
goto err;
drbg_params[0] =
OSSL_PARAM_construct_octet_string(DRBG_PARAM_ENTROPY,
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)t->entropyinpr2,
t->entropyinpr2len);
if (!EVP_RAND_set_ctx_params(test, drbg_params))
goto err;
/* This calls RAND_DRBG_reseed() internally when prediction_resistance = 1 */
if (!RAND_DRBG_generate(drbg, out, t->expectedlen, prediction_resistance,
t->entropyaddin2, t->entropyaddin2len))
if (!EVP_RAND_generate(drbg, out, t->expectedlen, strength,
prediction_resistance,
t->entropyaddin2, t->entropyaddin2len))
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, out);
@ -327,17 +326,18 @@ static int self_test_drbg(const ST_KAT_DRBG *t, OSSL_SELF_TEST *st,
if (memcmp(out, t->expected, t->expectedlen) != 0)
goto err;
if (!RAND_DRBG_uninstantiate(drbg))
if (!EVP_RAND_uninstantiate(drbg))
goto err;
/*
* Check that the DRBG data has been zeroized after RAND_DRBG_uninstantiate.
*/
if (memcmp((unsigned char *)&drbg->data, zero, sizeof(drbg->data)) != 0)
if (!EVP_RAND_verify_zeroization(drbg))
goto err;
ret = 1;
err:
RAND_DRBG_free(drbg);
EVP_RAND_CTX_free(drbg);
EVP_RAND_CTX_free(test);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}