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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 "crypto/s2n_pq.h"
#include "s2n_test.h"
#include "tls/extensions/s2n_client_pq_kem.h"
#include "tls/s2n_security_policies.h"
int main(int argc, char **argv)
{
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
const char *pq_security_policy_versions[] = {
"PQ-TLS-1-0-2021-05-24",
"PQ-TLS-1-0-2021-05-25",
"PQ-TLS-1-0-2021-05-26",
};
for (size_t policy_index = 0; policy_index < s2n_array_len(pq_security_policy_versions); policy_index++) {
const char *pq_security_policy_version = pq_security_policy_versions[policy_index];
const struct s2n_security_policy *security_policy = NULL;
EXPECT_SUCCESS(s2n_find_security_policy_from_version(pq_security_policy_version, &security_policy));
const struct s2n_kem_preferences *kem_preferences = security_policy->kem_preferences;
/* Test should_send */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
/* Default cipher preferences do not include PQ, so extension not sent */
EXPECT_FALSE(s2n_client_pq_kem_extension.should_send(conn));
/* Use cipher preferences that do include PQ */
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(conn, pq_security_policy_version));
if (s2n_pq_is_enabled()) {
EXPECT_TRUE(s2n_client_pq_kem_extension.should_send(conn));
} else {
EXPECT_FALSE(s2n_client_pq_kem_extension.should_send(conn));
}
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test send */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(conn, pq_security_policy_version));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_client_pq_kem_extension.send(conn, &stuffer));
/* Should write correct size */
uint16_t size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &size));
EXPECT_EQUAL(size, s2n_stuffer_data_available(&stuffer));
EXPECT_EQUAL(size, kem_preferences->kem_count * sizeof(kem_extension_size));
/* Should write ids */
uint16_t actual_id = 0;
for (size_t i = 0; i < kem_preferences->kem_count; i++) {
POSIX_GUARD(s2n_stuffer_read_uint16(&stuffer, &actual_id));
EXPECT_EQUAL(actual_id, kem_preferences->kems[i]->kem_extension_id);
}
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test receive - malformed length */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(conn, pq_security_policy_version));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_client_pq_kem_extension.send(conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_wipe_n(&stuffer, 1));
EXPECT_SUCCESS(s2n_client_pq_kem_extension.recv(conn, &stuffer));
EXPECT_EQUAL(conn->kex_params.client_pq_kem_extension.size, 0);
EXPECT_NULL(conn->kex_params.client_pq_kem_extension.data);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Test receive */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(conn, pq_security_policy_version));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_client_pq_kem_extension.send(conn, &stuffer));
EXPECT_SUCCESS(s2n_client_pq_kem_extension.recv(conn, &stuffer));
if (s2n_pq_is_enabled()) {
EXPECT_EQUAL(conn->kex_params.client_pq_kem_extension.size, kem_preferences->kem_count * sizeof(kem_extension_size));
EXPECT_NOT_NULL(conn->kex_params.client_pq_kem_extension.data);
EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
} else {
/* Server should ignore the extension if PQ is disabled */
EXPECT_EQUAL(conn->kex_params.client_pq_kem_extension.size, 0);
EXPECT_NULL(conn->kex_params.client_pq_kem_extension.data);
}
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
}
END_TEST();
}
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