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openssl/providers/fips/self_test_kats.c

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/*
* Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <openssl/evp.h>
#include <openssl/kdf.h>
#include <openssl/core_names.h>
#include <openssl/param_build.h>
#include <openssl/rand.h>
#include "crypto/rand.h"
#include "internal/cryptlib.h"
#include "internal/nelem.h"
#include "self_test.h"
#include "self_test_data.inc"
static int set_kat_drbg(OSSL_LIB_CTX *ctx,
const unsigned char *entropy, size_t entropy_len,
const unsigned char *nonce, size_t nonce_len,
const unsigned char *persstr, size_t persstr_len);
static int reset_main_drbg(OSSL_LIB_CTX *ctx);
static int self_test_digest(const ST_KAT_DIGEST *t, OSSL_SELF_TEST *st,
OSSL_LIB_CTX *libctx)
{
int ok = 0;
unsigned char out[EVP_MAX_MD_SIZE];
unsigned int out_len = 0;
EVP_MD_CTX *ctx = EVP_MD_CTX_new();
EVP_MD *md = EVP_MD_fetch(libctx, t->algorithm, NULL);
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_DIGEST, t->desc);
if (ctx == NULL
|| md == NULL
|| !EVP_DigestInit_ex(ctx, md, NULL)
|| !EVP_DigestUpdate(ctx, t->pt, t->pt_len)
|| !EVP_DigestFinal(ctx, out, &out_len))
goto err;
/* Optional corruption */
OSSL_SELF_TEST_oncorrupt_byte(st, out);
if (out_len != t->expected_len
|| memcmp(out, t->expected, out_len) != 0)
goto err;
ok = 1;
err:
EVP_MD_free(md);
EVP_MD_CTX_free(ctx);
OSSL_SELF_TEST_onend(st, ok);
return ok;
}
/*
* Helper function to setup a EVP_CipherInit
* Used to hide the complexity of Authenticated ciphers.
*/
static int cipher_init(EVP_CIPHER_CTX *ctx, const EVP_CIPHER *cipher,
const ST_KAT_CIPHER *t, int enc)
{
unsigned char *in_tag = NULL;
int pad = 0, tmp;
/* Flag required for Key wrapping */
EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW);
if (t->tag == NULL) {
/* Use a normal cipher init */
return EVP_CipherInit_ex(ctx, cipher, NULL, t->key, t->iv, enc)
&& EVP_CIPHER_CTX_set_padding(ctx, pad);
}
/* The authenticated cipher init */
if (!enc)
in_tag = (unsigned char *)t->tag;
return EVP_CipherInit_ex(ctx, cipher, NULL, NULL, NULL, enc)
&& (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, t->iv_len, NULL) > 0)
&& (in_tag == NULL
|| EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, t->tag_len,
in_tag) > 0)
&& EVP_CipherInit_ex(ctx, NULL, NULL, t->key, t->iv, enc)
&& EVP_CIPHER_CTX_set_padding(ctx, pad)
&& EVP_CipherUpdate(ctx, NULL, &tmp, t->aad, t->aad_len);
}
/* Test a single KAT for encrypt/decrypt */
static int self_test_cipher(const ST_KAT_CIPHER *t, OSSL_SELF_TEST *st,
OSSL_LIB_CTX *libctx)
{
int ret = 0, encrypt = 1, len = 0, ct_len = 0, pt_len = 0;
EVP_CIPHER_CTX *ctx = NULL;
EVP_CIPHER *cipher = NULL;
unsigned char ct_buf[256] = { 0 };
unsigned char pt_buf[256] = { 0 };
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_CIPHER, t->base.desc);
ctx = EVP_CIPHER_CTX_new();
if (ctx == NULL)
goto err;
cipher = EVP_CIPHER_fetch(libctx, t->base.algorithm, NULL);
if (cipher == NULL)
goto err;
/* Encrypt plain text message */
if ((t->mode & CIPHER_MODE_ENCRYPT) != 0) {
if (!cipher_init(ctx, cipher, t, encrypt)
|| !EVP_CipherUpdate(ctx, ct_buf, &len, t->base.pt,
t->base.pt_len)
|| !EVP_CipherFinal_ex(ctx, ct_buf + len, &ct_len))
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, ct_buf);
ct_len += len;
if (ct_len != (int)t->base.expected_len
|| memcmp(t->base.expected, ct_buf, ct_len) != 0)
goto err;
if (t->tag != NULL) {
unsigned char tag[16] = { 0 };
if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, t->tag_len,
tag) <= 0
|| memcmp(tag, t->tag, t->tag_len) != 0)
goto err;
}
}
/* Decrypt cipher text */
if ((t->mode & CIPHER_MODE_DECRYPT) != 0) {
if (!(cipher_init(ctx, cipher, t, !encrypt)
&& EVP_CipherUpdate(ctx, pt_buf, &len,
t->base.expected, t->base.expected_len)
&& EVP_CipherFinal_ex(ctx, pt_buf + len, &pt_len)))
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, pt_buf);
pt_len += len;
if (pt_len != (int)t->base.pt_len
|| memcmp(pt_buf, t->base.pt, pt_len) != 0)
goto err;
}
ret = 1;
err:
EVP_CIPHER_free(cipher);
EVP_CIPHER_CTX_free(ctx);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
static int add_params(OSSL_PARAM_BLD *bld, const ST_KAT_PARAM *params,
BN_CTX *ctx)
{
int ret = 0;
const ST_KAT_PARAM *p;
if (params == NULL)
return 1;
for (p = params; p->data != NULL; ++p)
{
switch (p->type) {
case OSSL_PARAM_UNSIGNED_INTEGER: {
BIGNUM *bn = BN_CTX_get(ctx);
if (bn == NULL
|| (BN_bin2bn(p->data, p->data_len, bn) == NULL)
|| !OSSL_PARAM_BLD_push_BN(bld, p->name, bn))
goto err;
break;
}
case OSSL_PARAM_UTF8_STRING: {
if (!OSSL_PARAM_BLD_push_utf8_string(bld, p->name, p->data,
p->data_len))
goto err;
break;
}
case OSSL_PARAM_OCTET_STRING: {
if (!OSSL_PARAM_BLD_push_octet_string(bld, p->name, p->data,
p->data_len))
goto err;
break;
}
case OSSL_PARAM_INTEGER: {
if (!OSSL_PARAM_BLD_push_int(bld, p->name, *(int *)p->data))
goto err;
break;
}
default:
break;
}
}
ret = 1;
err:
return ret;
}
static int self_test_kdf(const ST_KAT_KDF *t, OSSL_SELF_TEST *st,
OSSL_LIB_CTX *libctx)
{
int ret = 0;
unsigned char out[128];
EVP_KDF *kdf = NULL;
EVP_KDF_CTX *ctx = NULL;
BN_CTX *bnctx = NULL;
OSSL_PARAM *params = NULL;
OSSL_PARAM_BLD *bld = NULL;
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_KDF, t->desc);
bld = OSSL_PARAM_BLD_new();
if (bld == NULL)
goto err;
kdf = EVP_KDF_fetch(libctx, t->algorithm, "");
if (kdf == NULL)
goto err;
ctx = EVP_KDF_CTX_new(kdf);
if (ctx == NULL)
goto err;
bnctx = BN_CTX_new_ex(libctx);
if (bnctx == NULL)
goto err;
if (!add_params(bld, t->params, bnctx))
goto err;
params = OSSL_PARAM_BLD_to_param(bld);
if (params == NULL)
goto err;
if (t->expected_len > sizeof(out))
goto err;
if (EVP_KDF_derive(ctx, out, t->expected_len, params) <= 0)
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, out);
if (memcmp(out, t->expected, t->expected_len) != 0)
goto err;
ret = 1;
err:
EVP_KDF_free(kdf);
EVP_KDF_CTX_free(ctx);
BN_CTX_free(bnctx);
OSSL_PARAM_free(params);
OSSL_PARAM_BLD_free(bld);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
static int self_test_drbg(const ST_KAT_DRBG *t, OSSL_SELF_TEST *st,
OSSL_LIB_CTX *libctx)
{
int ret = 0;
unsigned char out[256];
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
};
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_DRBG, t->desc);
rand = EVP_RAND_fetch(libctx, "TEST-RAND", NULL);
if (rand == NULL)
goto err;
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_CTX_set_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;
strength = EVP_RAND_get_strength(drbg);
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_utf8_string(OSSL_DRBG_PARAM_MAC, "HMAC", 0);
if (!EVP_RAND_CTX_set_params(drbg, drbg_params))
goto err;
drbg_params[0] =
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_instantiate(test, strength, 0, NULL, 0, drbg_params))
goto err;
if (!EVP_RAND_instantiate(drbg, strength, 0, t->persstr, t->persstrlen,
NULL))
goto err;
drbg_params[0] =
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)t->entropyinpr1,
t->entropyinpr1len);
if (!EVP_RAND_CTX_set_params(test, drbg_params))
goto err;
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(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)t->entropyinpr2,
t->entropyinpr2len);
if (!EVP_RAND_CTX_set_params(test, drbg_params))
goto err;
/*
* This calls ossl_prov_drbg_reseed() internally when
* prediction_resistance = 1
*/
if (!EVP_RAND_generate(drbg, out, t->expectedlen, strength,
prediction_resistance,
t->entropyaddin2, t->entropyaddin2len))
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, out);
if (memcmp(out, t->expected, t->expectedlen) != 0)
goto err;
if (!EVP_RAND_uninstantiate(drbg))
goto err;
/*
* Check that the DRBG data has been zeroized after
* ossl_prov_drbg_uninstantiate.
*/
if (!EVP_RAND_verify_zeroization(drbg))
goto err;
ret = 1;
err:
EVP_RAND_CTX_free(drbg);
EVP_RAND_CTX_free(test);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
static int self_test_ka(const ST_KAT_KAS *t,
OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int ret = 0;
EVP_PKEY_CTX *kactx = NULL, *dctx = NULL;
EVP_PKEY *pkey = NULL, *peerkey = NULL;
OSSL_PARAM *params = NULL;
OSSL_PARAM *params_peer = NULL;
unsigned char secret[256];
size_t secret_len = sizeof(secret);
OSSL_PARAM_BLD *bld = NULL;
BN_CTX *bnctx = NULL;
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_KA, t->desc);
bnctx = BN_CTX_new_ex(libctx);
if (bnctx == NULL)
goto err;
bld = OSSL_PARAM_BLD_new();
if (bld == NULL)
goto err;
if (!add_params(bld, t->key_group, bnctx)
|| !add_params(bld, t->key_host_data, bnctx))
goto err;
params = OSSL_PARAM_BLD_to_param(bld);
if (!add_params(bld, t->key_group, bnctx)
|| !add_params(bld, t->key_peer_data, bnctx))
goto err;
params_peer = OSSL_PARAM_BLD_to_param(bld);
if (params == NULL || params_peer == NULL)
goto err;
/* Create a EVP_PKEY_CTX to load the DH keys into */
kactx = EVP_PKEY_CTX_new_from_name(libctx, t->algorithm, "");
if (kactx == NULL)
goto err;
if (EVP_PKEY_fromdata_init(kactx) <= 0
|| EVP_PKEY_fromdata(kactx, &pkey, EVP_PKEY_KEYPAIR, params) <= 0)
goto err;
if (EVP_PKEY_fromdata_init(kactx) <= 0
|| EVP_PKEY_fromdata(kactx, &peerkey, EVP_PKEY_KEYPAIR, params_peer) <= 0)
goto err;
/* Create a EVP_PKEY_CTX to perform key derivation */
dctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, NULL);
if (dctx == NULL)
goto err;
if (EVP_PKEY_derive_init(dctx) <= 0
|| EVP_PKEY_derive_set_peer(dctx, peerkey) <= 0
|| EVP_PKEY_derive(dctx, secret, &secret_len) <= 0)
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, secret);
if (secret_len != t->expected_len
|| memcmp(secret, t->expected, t->expected_len) != 0)
goto err;
ret = 1;
err:
BN_CTX_free(bnctx);
EVP_PKEY_free(pkey);
EVP_PKEY_free(peerkey);
EVP_PKEY_CTX_free(kactx);
EVP_PKEY_CTX_free(dctx);
OSSL_PARAM_free(params_peer);
OSSL_PARAM_free(params);
OSSL_PARAM_BLD_free(bld);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
#endif /* !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC) */
static int self_test_sign(const ST_KAT_SIGN *t,
OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int ret = 0;
OSSL_PARAM *params = NULL, *params_sig = NULL;
OSSL_PARAM_BLD *bld = NULL;
EVP_PKEY_CTX *sctx = NULL, *kctx = NULL;
EVP_PKEY *pkey = NULL;
unsigned char sig[256];
BN_CTX *bnctx = NULL;
size_t siglen = sizeof(sig);
static const unsigned char dgst[] = {
0x7f, 0x83, 0xb1, 0x65, 0x7f, 0xf1, 0xfc, 0x53, 0xb9, 0x2d, 0xc1, 0x81,
0x48, 0xa1, 0xd6, 0x5d, 0xfc, 0x2d, 0x4b, 0x1f, 0xa3, 0xd6, 0x77, 0x28,
0x4a, 0xdd, 0xd2, 0x00, 0x12, 0x6d, 0x90, 0x69
};
const char *typ = OSSL_SELF_TEST_TYPE_KAT_SIGNATURE;
if (t->sig_expected == NULL)
typ = OSSL_SELF_TEST_TYPE_PCT_SIGNATURE;
OSSL_SELF_TEST_onbegin(st, typ, t->desc);
bnctx = BN_CTX_new_ex(libctx);
if (bnctx == NULL)
goto err;
bld = OSSL_PARAM_BLD_new();
if (bld == NULL)
goto err;
if (!add_params(bld, t->key, bnctx))
goto err;
params = OSSL_PARAM_BLD_to_param(bld);
/* Create a EVP_PKEY_CTX to load the DSA key into */
kctx = EVP_PKEY_CTX_new_from_name(libctx, t->algorithm, "");
if (kctx == NULL || params == NULL)
goto err;
if (EVP_PKEY_fromdata_init(kctx) <= 0
|| EVP_PKEY_fromdata(kctx, &pkey, EVP_PKEY_KEYPAIR, params) <= 0)
goto err;
/* Create a EVP_PKEY_CTX to use for the signing operation */
sctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, NULL);
if (sctx == NULL
|| EVP_PKEY_sign_init(sctx) <= 0)
goto err;
/* set signature parameters */
if (!OSSL_PARAM_BLD_push_utf8_string(bld, OSSL_SIGNATURE_PARAM_DIGEST,
t->mdalgorithm,
strlen(t->mdalgorithm) + 1))
goto err;
params_sig = OSSL_PARAM_BLD_to_param(bld);
if (EVP_PKEY_CTX_set_params(sctx, params_sig) <= 0)
goto err;
if (EVP_PKEY_sign(sctx, sig, &siglen, dgst, sizeof(dgst)) <= 0
|| EVP_PKEY_verify_init(sctx) <= 0
|| EVP_PKEY_CTX_set_params(sctx, params_sig) <= 0)
goto err;
if (t->sig_expected != NULL
&& (siglen != t->sig_expected_len
|| memcmp(sig, t->sig_expected, t->sig_expected_len) != 0))
goto err;
OSSL_SELF_TEST_oncorrupt_byte(st, sig);
if (EVP_PKEY_verify(sctx, sig, siglen, dgst, sizeof(dgst)) <= 0)
goto err;
ret = 1;
err:
BN_CTX_free(bnctx);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(kctx);
EVP_PKEY_CTX_free(sctx);
OSSL_PARAM_free(params);
OSSL_PARAM_free(params_sig);
OSSL_PARAM_BLD_free(bld);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
/*
* Test an encrypt or decrypt KAT..
*
* FIPS 140-2 IG D.9 states that separate KAT tests are needed for encrypt
* and decrypt..
*/
static int self_test_asym_cipher(const ST_KAT_ASYM_CIPHER *t, OSSL_SELF_TEST *st,
OSSL_LIB_CTX *libctx)
{
int ret = 0;
OSSL_PARAM *keyparams = NULL, *initparams = NULL;
OSSL_PARAM_BLD *keybld = NULL, *initbld = NULL;
EVP_PKEY_CTX *encctx = NULL, *keyctx = NULL;
EVP_PKEY *key = NULL;
BN_CTX *bnctx = NULL;
unsigned char out[256];
size_t outlen = sizeof(out);
OSSL_SELF_TEST_onbegin(st, OSSL_SELF_TEST_TYPE_KAT_ASYM_CIPHER, t->desc);
bnctx = BN_CTX_new_ex(libctx);
if (bnctx == NULL)
goto err;
/* Load a public or private key from data */
keybld = OSSL_PARAM_BLD_new();
if (keybld == NULL
|| !add_params(keybld, t->key, bnctx))
goto err;
keyparams = OSSL_PARAM_BLD_to_param(keybld);
keyctx = EVP_PKEY_CTX_new_from_name(libctx, t->algorithm, NULL);
if (keyctx == NULL || keyparams == NULL)
goto err;
if (EVP_PKEY_fromdata_init(keyctx) <= 0
|| EVP_PKEY_fromdata(keyctx, &key, EVP_PKEY_KEYPAIR, keyparams) <= 0)
goto err;
/* Create a EVP_PKEY_CTX to use for the encrypt or decrypt operation */
encctx = EVP_PKEY_CTX_new_from_pkey(libctx, key, NULL);
if (encctx == NULL
|| (t->encrypt && EVP_PKEY_encrypt_init(encctx) <= 0)
|| (!t->encrypt && EVP_PKEY_decrypt_init(encctx) <= 0))
goto err;
/* Add any additional parameters such as padding */
if (t->postinit != NULL) {
initbld = OSSL_PARAM_BLD_new();
if (initbld == NULL)
goto err;
if (!add_params(initbld, t->postinit, bnctx))
goto err;
initparams = OSSL_PARAM_BLD_to_param(initbld);
if (initparams == NULL)
goto err;
if (EVP_PKEY_CTX_set_params(encctx, initparams) <= 0)
goto err;
}
if (t->encrypt) {
if (EVP_PKEY_encrypt(encctx, out, &outlen,
t->in, t->in_len) <= 0)
goto err;
} else {
if (EVP_PKEY_decrypt(encctx, out, &outlen,
t->in, t->in_len) <= 0)
goto err;
}
/* Check the KAT */
OSSL_SELF_TEST_oncorrupt_byte(st, out);
if (outlen != t->expected_len
|| memcmp(out, t->expected, t->expected_len) != 0)
goto err;
ret = 1;
err:
BN_CTX_free(bnctx);
EVP_PKEY_free(key);
EVP_PKEY_CTX_free(encctx);
EVP_PKEY_CTX_free(keyctx);
OSSL_PARAM_free(keyparams);
OSSL_PARAM_BLD_free(keybld);
OSSL_PARAM_free(initparams);
OSSL_PARAM_BLD_free(initbld);
OSSL_SELF_TEST_onend(st, ret);
return ret;
}
/*
* Test a data driven list of KAT's for digest algorithms.
* All tests are run regardless of if they fail or not.
* Return 0 if any test fails.
*/
static int self_test_digests(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
for (i = 0; i < (int)OSSL_NELEM(st_kat_digest_tests); ++i) {
if (!self_test_digest(&st_kat_digest_tests[i], st, libctx))
ret = 0;
}
return ret;
}
static int self_test_ciphers(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
for (i = 0; i < (int)OSSL_NELEM(st_kat_cipher_tests); ++i) {
if (!self_test_cipher(&st_kat_cipher_tests[i], st, libctx))
ret = 0;
}
return ret;
}
static int self_test_asym_ciphers(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
for (i = 0; i < (int)OSSL_NELEM(st_kat_asym_cipher_tests); ++i) {
if (!self_test_asym_cipher(&st_kat_asym_cipher_tests[i], st, libctx))
ret = 0;
}
return ret;
}
static int self_test_kdfs(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
for (i = 0; i < (int)OSSL_NELEM(st_kat_kdf_tests); ++i) {
if (!self_test_kdf(&st_kat_kdf_tests[i], st, libctx))
ret = 0;
}
return ret;
}
static int self_test_drbgs(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
for (i = 0; i < (int)OSSL_NELEM(st_kat_drbg_tests); ++i) {
if (!self_test_drbg(&st_kat_drbg_tests[i], st, libctx))
ret = 0;
}
return ret;
}
static int self_test_kas(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int ret = 1;
#if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
int i;
for (i = 0; i < (int)OSSL_NELEM(st_kat_kas_tests); ++i) {
if (!self_test_ka(&st_kat_kas_tests[i], st, libctx))
ret = 0;
}
#endif
return ret;
}
static int self_test_signatures(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
int i, ret = 1;
const ST_KAT_SIGN *t;
for (i = 0; ret && i < (int)OSSL_NELEM(st_kat_sign_tests); ++i) {
t = st_kat_sign_tests + i;
if (!set_kat_drbg(libctx, t->entropy, t->entropy_len,
t->nonce, t->nonce_len, t->persstr, t->persstr_len))
return 0;
if (!self_test_sign(t, st, libctx))
ret = 0;
if (!reset_main_drbg(libctx))
ret = 0;
}
return ret;
}
/*
* Swap the library context DRBG for KAT testing
*
* In FIPS 140-3, the asymmetric POST must be a KAT, not a PCT. For DSA and ECDSA,
* the sign operation includes the random value 'k'. For a KAT to work, we
* have to have control of the DRBG to make sure it is in a "test" state, where
* its output is truly deterministic.
*
*/
/*
* Replacement "random" sources
* main_rand is used for most tests and it's set to generate mode.
* kat_rand is used for KATs where specific input is mandated.
*/
static EVP_RAND_CTX *kat_rand = NULL;
static EVP_RAND_CTX *main_rand = NULL;
static int set_kat_drbg(OSSL_LIB_CTX *ctx,
const unsigned char *entropy, size_t entropy_len,
const unsigned char *nonce, size_t nonce_len,
const unsigned char *persstr, size_t persstr_len) {
EVP_RAND *rand;
unsigned int strength = 256;
EVP_RAND_CTX *parent_rand = NULL;
OSSL_PARAM drbg_params[3] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
/* If not NULL, we didn't cleanup from last call: BAD */
if (kat_rand != NULL)
return 0;
rand = EVP_RAND_fetch(ctx, "TEST-RAND", NULL);
if (rand == NULL)
return 0;
parent_rand = EVP_RAND_CTX_new(rand, NULL);
EVP_RAND_free(rand);
if (parent_rand == NULL)
goto err;
drbg_params[0] = OSSL_PARAM_construct_uint(OSSL_RAND_PARAM_STRENGTH,
&strength);
if (!EVP_RAND_CTX_set_params(parent_rand, drbg_params))
goto err;
rand = EVP_RAND_fetch(ctx, "HASH-DRBG", NULL);
if (rand == NULL)
goto err;
kat_rand = EVP_RAND_CTX_new(rand, parent_rand);
EVP_RAND_free(rand);
if (kat_rand == NULL)
goto err;
drbg_params[0] = OSSL_PARAM_construct_utf8_string("digest", "SHA256", 0);
if (!EVP_RAND_CTX_set_params(kat_rand, drbg_params))
goto err;
/* Instantiate the RNGs */
drbg_params[0] =
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY,
(void *)entropy, entropy_len);
drbg_params[1] =
OSSL_PARAM_construct_octet_string(OSSL_RAND_PARAM_TEST_NONCE,
(void *)nonce, nonce_len);
if (!EVP_RAND_instantiate(parent_rand, strength, 0, NULL, 0, drbg_params))
goto err;
EVP_RAND_CTX_free(parent_rand);
parent_rand = NULL;
if (!EVP_RAND_instantiate(kat_rand, strength, 0, persstr, persstr_len, NULL))
goto err;
/* When we set the new private generator this one is freed, so upref it */
if (!EVP_RAND_CTX_up_ref(main_rand))
goto err;
/* Update the library context DRBG */
if (RAND_set0_private(ctx, kat_rand) > 0) {
/* Keeping a copy to verify zeroization */
if (EVP_RAND_CTX_up_ref(kat_rand))
return 1;
RAND_set0_private(ctx, main_rand);
}
err:
EVP_RAND_CTX_free(parent_rand);
EVP_RAND_CTX_free(kat_rand);
kat_rand = NULL;
return 0;
}
static int reset_main_drbg(OSSL_LIB_CTX *ctx) {
int ret = 1;
if (!RAND_set0_private(ctx, main_rand))
ret = 0;
if (kat_rand != NULL) {
if (!EVP_RAND_uninstantiate(kat_rand)
|| !EVP_RAND_verify_zeroization(kat_rand))
ret = 0;
EVP_RAND_CTX_free(kat_rand);
kat_rand = NULL;
}
return ret;
}
static int setup_main_random(OSSL_LIB_CTX *libctx)
{
OSSL_PARAM drbg_params[3] = {
OSSL_PARAM_END, OSSL_PARAM_END, OSSL_PARAM_END
};
unsigned int strength = 256, generate = 1;
EVP_RAND *rand;
rand = EVP_RAND_fetch(libctx, "TEST-RAND", NULL);
if (rand == NULL)
return 0;
main_rand = EVP_RAND_CTX_new(rand, NULL);
EVP_RAND_free(rand);
if (main_rand == NULL)
goto err;
drbg_params[0] = OSSL_PARAM_construct_uint(OSSL_RAND_PARAM_GENERATE,
&generate);
drbg_params[1] = OSSL_PARAM_construct_uint(OSSL_RAND_PARAM_STRENGTH,
&strength);
if (!EVP_RAND_instantiate(main_rand, strength, 0, NULL, 0, drbg_params))
goto err;
return 1;
err:
EVP_RAND_CTX_free(main_rand);
return 0;
}
/*
* Run the algorithm KAT's.
* Return 1 is successful, otherwise return 0.
* This runs all the tests regardless of if any fail.
*/
int SELF_TEST_kats(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
{
EVP_RAND_CTX *saved_rand = ossl_rand_get0_private_noncreating(libctx);
int ret = 1;
if (!setup_main_random(libctx)
|| !RAND_set0_private(libctx, main_rand)) {
EVP_RAND_CTX_free(main_rand);
return 0;
}
if (!self_test_digests(st, libctx))
ret = 0;
if (!self_test_ciphers(st, libctx))
ret = 0;
if (!self_test_signatures(st, libctx))
ret = 0;
if (!self_test_kdfs(st, libctx))
ret = 0;
if (!self_test_drbgs(st, libctx))
ret = 0;
if (!self_test_kas(st, libctx))
ret = 0;
if (!self_test_asym_ciphers(st, libctx))
ret = 0;
RAND_set0_private(libctx, saved_rand);
return ret;
}
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