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/*
* Copyright 2020 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/core_dispatch.h>
#include <openssl/e_os2.h>
#include <openssl/params.h>
#include <openssl/core_names.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/randerr.h>
#include "prov/providercommon.h"
#include "prov/provider_ctx.h"
#include "prov/provider_util.h"
#include "prov/implementations.h"
static OSSL_FUNC_rand_newctx_fn test_rng_new;
static OSSL_FUNC_rand_freectx_fn test_rng_free;
static OSSL_FUNC_rand_instantiate_fn test_rng_instantiate;
static OSSL_FUNC_rand_uninstantiate_fn test_rng_uninstantiate;
static OSSL_FUNC_rand_generate_fn test_rng_generate;
static OSSL_FUNC_rand_reseed_fn test_rng_reseed;
static OSSL_FUNC_rand_nonce_fn test_rng_nonce;
static OSSL_FUNC_rand_settable_ctx_params_fn test_rng_settable_ctx_params;
static OSSL_FUNC_rand_set_ctx_params_fn test_rng_set_ctx_params;
static OSSL_FUNC_rand_gettable_ctx_params_fn test_rng_gettable_ctx_params;
static OSSL_FUNC_rand_get_ctx_params_fn test_rng_get_ctx_params;
static OSSL_FUNC_rand_verify_zeroization_fn test_rng_verify_zeroization;
static OSSL_FUNC_rand_enable_locking_fn test_rng_enable_locking;
static OSSL_FUNC_rand_lock_fn test_rng_lock;
static OSSL_FUNC_rand_unlock_fn test_rng_unlock;
typedef struct {
void *provctx;
int state;
unsigned int strength;
size_t max_request;
unsigned char *entropy, *nonce;
size_t entropy_len, entropy_pos, nonce_len;
CRYPTO_RWLOCK *lock;
} PROV_TEST_RNG;
static void *test_rng_new(void *provctx, void *parent,
const OSSL_DISPATCH *parent_dispatch)
{
PROV_TEST_RNG *t;
if (parent != NULL)
return NULL;
t = OPENSSL_zalloc(sizeof(*t));
if (t == NULL)
return NULL;
t->max_request = INT_MAX;
t->provctx = provctx;
t->state = EVP_RAND_STATE_UNINITIALISED;
return t;
}
static void test_rng_free(void *vtest)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
if (t == NULL)
return;
OPENSSL_free(t->entropy);
OPENSSL_free(t->nonce);
CRYPTO_THREAD_lock_free(t->lock);
OPENSSL_free(t);
}
static int test_rng_instantiate(void *vtest, unsigned int strength,
int prediction_resistance,
const unsigned char *pstr, size_t pstr_len)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
if (strength > t->strength)
return 0;
t->state = EVP_RAND_STATE_READY;
t->entropy_pos = 0;
return 1;
}
static int test_rng_uninstantiate(void *vtest)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
t->entropy_pos = 0;
t->state = EVP_RAND_STATE_UNINITIALISED;
return 1;
}
static int test_rng_generate(void *vtest, unsigned char *out, size_t outlen,
unsigned int strength, int prediction_resistance,
const unsigned char *adin, size_t adin_len)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
size_t i;
if (strength > t->strength)
return 0;
for (i = 0; i < outlen; i++) {
out[i] = t->entropy[t->entropy_pos++];
if (t->entropy_pos >= t->entropy_len)
break;
}
return 1;
}
static int test_rng_reseed(ossl_unused void *vtest,
ossl_unused int prediction_resistance,
ossl_unused const unsigned char *ent,
ossl_unused size_t ent_len,
ossl_unused const unsigned char *adin,
ossl_unused size_t adin_len)
{
return 1;
}
static size_t test_rng_nonce(void *vtest, unsigned char *out,
unsigned int strength,
ossl_unused size_t min_noncelen,
ossl_unused size_t max_noncelen)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
if (t->nonce == NULL || strength > t->strength)
return 0;
if (out != NULL)
memcpy(out, t->nonce, t->nonce_len);
return t->nonce_len;
}
static int test_rng_get_ctx_params(void *vtest, OSSL_PARAM params[])
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
OSSL_PARAM *p;
p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STATE);
if (p != NULL && !OSSL_PARAM_set_int(p, t->state))
return 0;
p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_STRENGTH);
if (p != NULL && !OSSL_PARAM_set_int(p, t->strength))
return 0;
p = OSSL_PARAM_locate(params, OSSL_RAND_PARAM_MAX_REQUEST);
if (p != NULL && !OSSL_PARAM_set_size_t(p, t->max_request))
return 0;
return 1;
}
static const OSSL_PARAM *test_rng_gettable_ctx_params(ossl_unused void *provctx)
{
static const OSSL_PARAM known_gettable_ctx_params[] = {
OSSL_PARAM_int(OSSL_RAND_PARAM_STATE, NULL),
OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
OSSL_PARAM_END
};
return known_gettable_ctx_params;
}
static int test_rng_set_ctx_params(void *vtest, const OSSL_PARAM params[])
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
const OSSL_PARAM *p;
void *ptr = NULL;
size_t size = 0;
p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_STRENGTH);
if (p != NULL && !OSSL_PARAM_get_uint(p, &t->strength))
return 0;
p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_ENTROPY);
if (p != NULL) {
if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
return 0;
OPENSSL_free(t->entropy);
t->entropy = ptr;
t->entropy_len = size;
t->entropy_pos = 0;
ptr = NULL;
}
p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_TEST_NONCE);
if (p != NULL) {
if (!OSSL_PARAM_get_octet_string(p, &ptr, 0, &size))
return 0;
OPENSSL_free(t->nonce);
t->nonce = ptr;
t->nonce_len = size;
}
p = OSSL_PARAM_locate_const(params, OSSL_RAND_PARAM_MAX_REQUEST);
if (p != NULL && !OSSL_PARAM_get_size_t(p, &t->max_request))
return 0;
return 1;
}
static const OSSL_PARAM *test_rng_settable_ctx_params(ossl_unused void *provctx)
{
static const OSSL_PARAM known_settable_ctx_params[] = {
OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_ENTROPY, NULL, 0),
OSSL_PARAM_octet_string(OSSL_RAND_PARAM_TEST_NONCE, NULL, 0),
OSSL_PARAM_uint(OSSL_RAND_PARAM_STRENGTH, NULL),
OSSL_PARAM_size_t(OSSL_RAND_PARAM_MAX_REQUEST, NULL),
OSSL_PARAM_END
};
return known_settable_ctx_params;
}
static int test_rng_verify_zeroization(ossl_unused void *vtest)
{
return 1;
}
static int test_rng_enable_locking(void *vtest)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
if (t != NULL && t->lock == NULL) {
t->lock = CRYPTO_THREAD_lock_new();
if (t->lock == NULL) {
ERR_raise(ERR_LIB_PROV, RAND_R_FAILED_TO_CREATE_LOCK);
return 0;
}
}
return 1;
}
static int test_rng_lock(void *vtest)
{
PROV_TEST_RNG *t = (PROV_TEST_RNG *)vtest;
if (t == NULL || t->lock == NULL
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