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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 <stdio.h>
#include <string.h>
#include "api/s2n.h"
#include "crypto/s2n_cipher.h"
#include "crypto/s2n_hmac.h"
#include "s2n_test.h"
#include "stuffer/s2n_stuffer.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_cipher_suites.h"
#include "tls/s2n_prf.h"
#include "tls/s2n_record.h"
#include "utils/s2n_random.h"
int main(int argc, char **argv)
{
struct s2n_connection *conn;
uint8_t mac_key[] = "sample mac key";
uint8_t aes128_key[] = "123456789012345";
uint8_t aes256_key[] = "1234567890123456789012345678901";
struct s2n_blob aes128 = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&aes128, aes128_key, sizeof(aes128_key)));
struct s2n_blob aes256 = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&aes256, aes256_key, sizeof(aes256_key)));
uint8_t random_data[S2N_DEFAULT_FRAGMENT_LENGTH + 1];
struct s2n_blob r = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&r, random_data, sizeof(random_data)));
BEGIN_TEST();
EXPECT_SUCCESS(s2n_disable_tls13_in_test());
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_OK(s2n_get_public_random_data(&r));
/* Peer and we are in sync */
conn->server = conn->secure;
conn->client = conn->secure;
/* test the AES128 cipher with a SHA1 hash */
conn->secure->cipher_suite->record_alg = &s2n_record_alg_aes128_sha;
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->init(&conn->secure->server_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->init(&conn->secure->client_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->set_encryption_key(&conn->secure->server_key, &aes128));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->set_decryption_key(&conn->secure->client_key, &aes128));
EXPECT_SUCCESS(s2n_hmac_init(&conn->secure->client_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
EXPECT_SUCCESS(s2n_hmac_init(&conn->secure->server_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
conn->actual_protocol_version = S2N_TLS11;
for (size_t i = 0; i <= S2N_DEFAULT_FRAGMENT_LENGTH + 1; i++) {
struct s2n_blob in = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&in, random_data, i));
int bytes_written;
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->out));
s2n_result result = s2n_record_write(conn, TLS_APPLICATION_DATA, &in);
if (i <= S2N_DEFAULT_FRAGMENT_LENGTH) {
EXPECT_OK(result);
bytes_written = i;
} else {
EXPECT_ERROR_WITH_ERRNO(result, S2N_ERR_FRAGMENT_LENGTH_TOO_LARGE);
bytes_written = S2N_DEFAULT_FRAGMENT_LENGTH;
}
uint16_t predicted_length = bytes_written + 1 + 20 + 16;
if (predicted_length % 16) {
predicted_length += (16 - (predicted_length % 16));
}
EXPECT_EQUAL(conn->out.blob.data[0], TLS_APPLICATION_DATA);
EXPECT_EQUAL(conn->out.blob.data[1], 3);
EXPECT_EQUAL(conn->out.blob.data[2], 2);
EXPECT_EQUAL(conn->out.blob.data[3], (predicted_length >> 8) & 0xff);
EXPECT_EQUAL(conn->out.blob.data[4], predicted_length & 0xff);
/* The data should be encrypted */
if (bytes_written > 10) {
EXPECT_NOT_EQUAL(memcmp(conn->out.blob.data + 5, random_data, bytes_written), 0);
}
/* Copy the encrypted out data to the in data */
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->header_in, 5));
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->in, s2n_stuffer_data_available(&conn->out)));
/* Let's decrypt it */
uint8_t content_type;
uint16_t fragment_length;
EXPECT_SUCCESS(s2n_record_header_parse(conn, &content_type, &fragment_length));
EXPECT_SUCCESS(s2n_record_parse(conn));
EXPECT_EQUAL(content_type, TLS_APPLICATION_DATA);
EXPECT_EQUAL(fragment_length, predicted_length);
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
}
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->destroy_key(&conn->secure->server_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->destroy_key(&conn->secure->client_key));
EXPECT_SUCCESS(s2n_connection_free(conn));
/* test the AES256 cipher with a SHA1 hash */
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
conn->server = conn->secure;
conn->client = conn->secure;
conn->secure->cipher_suite->record_alg = &s2n_record_alg_aes256_sha;
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->init(&conn->secure->server_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->init(&conn->secure->client_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->set_encryption_key(&conn->secure->server_key, &aes256));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->set_decryption_key(&conn->secure->client_key, &aes256));
EXPECT_SUCCESS(s2n_hmac_init(&conn->secure->client_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
EXPECT_SUCCESS(s2n_hmac_init(&conn->secure->server_record_mac, S2N_HMAC_SHA1, mac_key, sizeof(mac_key)));
conn->actual_protocol_version = S2N_TLS11;
for (size_t i = 0; i <= S2N_DEFAULT_FRAGMENT_LENGTH + 1; i++) {
struct s2n_blob in = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&in, random_data, i));
int bytes_written;
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->out));
s2n_result result = s2n_record_write(conn, TLS_APPLICATION_DATA, &in);
if (i <= S2N_DEFAULT_FRAGMENT_LENGTH) {
EXPECT_OK(result);
bytes_written = i;
} else {
EXPECT_ERROR_WITH_ERRNO(result, S2N_ERR_FRAGMENT_LENGTH_TOO_LARGE);
bytes_written = S2N_DEFAULT_FRAGMENT_LENGTH;
}
uint16_t predicted_length = bytes_written + 1 + 20 + 16;
if (predicted_length % 16) {
predicted_length += (16 - (predicted_length % 16));
}
EXPECT_EQUAL(conn->out.blob.data[0], TLS_APPLICATION_DATA);
EXPECT_EQUAL(conn->out.blob.data[1], 3);
EXPECT_EQUAL(conn->out.blob.data[2], 2);
EXPECT_EQUAL(conn->out.blob.data[3], (predicted_length >> 8) & 0xff);
EXPECT_EQUAL(conn->out.blob.data[4], predicted_length & 0xff);
/* The data should be encrypted */
if (bytes_written > 10) {
EXPECT_NOT_EQUAL(memcmp(conn->out.blob.data + 5, random_data, bytes_written), 0);
}
/* Copy the encrypted out data to the in data */
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->header_in, 5));
EXPECT_SUCCESS(s2n_stuffer_copy(&conn->out, &conn->in, s2n_stuffer_data_available(&conn->out)));
/* Let's decrypt it */
uint8_t content_type;
uint16_t fragment_length;
EXPECT_SUCCESS(s2n_record_header_parse(conn, &content_type, &fragment_length));
EXPECT_SUCCESS(s2n_record_parse(conn));
EXPECT_EQUAL(content_type, TLS_APPLICATION_DATA);
EXPECT_EQUAL(fragment_length, predicted_length);
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->header_in));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->in));
}
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->destroy_key(&conn->secure->server_key));
EXPECT_SUCCESS(conn->secure->cipher_suite->record_alg->cipher->destroy_key(&conn->secure->client_key));
EXPECT_SUCCESS(s2n_connection_free(conn));
END_TEST();
}
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