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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include "utils/s2n_random.h"
#include "utils/s2n_result.h"
#include "utils/s2n_safety.h"
#include "s2n_pq_random.h"
static S2N_RESULT s2n_get_random_bytes_default(uint8_t *buffer, uint32_t num_bytes);
static s2n_get_random_bytes_callback s2n_get_random_bytes_cb = s2n_get_random_bytes_default;
S2N_RESULT s2n_get_random_bytes(uint8_t *buffer, uint32_t num_bytes) {
RESULT_ENSURE_REF(buffer);
RESULT_GUARD(s2n_get_random_bytes_cb(buffer, num_bytes));
return S2N_RESULT_OK;
}
static S2N_RESULT s2n_get_random_bytes_default(uint8_t *buffer, uint32_t num_bytes) {
struct s2n_blob out = { 0 };
RESULT_GUARD_POSIX(s2n_blob_init(&out, buffer, num_bytes));
RESULT_GUARD(s2n_get_private_random_data(&out));
return S2N_RESULT_OK;
}
S2N_RESULT s2n_set_rand_bytes_callback_for_testing(s2n_get_random_bytes_callback rand_bytes_callback) {
RESULT_ENSURE(s2n_in_unit_test(), S2N_ERR_NOT_IN_UNIT_TEST);
s2n_get_random_bytes_cb = rand_bytes_callback;
return S2N_RESULT_OK;
}
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