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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 "s2n_test.h"
#include "testlib/s2n_testlib.h"
#include "tls/s2n_connection.h"
#include "tls/s2n_handshake.h"
#include "tls/s2n_quic_support.h"
#include "tls/s2n_tls.h"
#include "utils/s2n_mem.h"
/* We need access to some io logic */
#include "tls/s2n_handshake_io.c"
#define TEST_TICKET_AGE_ADD 0x01, 0x02, 0x03, 0x04
#define TEST_LIFETIME 0x00, 0x01, 0x01, 0x01
#define TEST_TICKET 0x01, 0xFF, 0x23
static const uint8_t TEST_DATA[] = "test";
static const size_t TEST_DATA_SIZE = sizeof(TEST_DATA);
struct s2n_stuffer input_stuffer, output_stuffer;
static int s2n_test_session_ticket_cb(struct s2n_connection *conn, void *ctx, struct s2n_session_ticket *ticket)
{
uint8_t *count = (uint8_t *) ctx;
(*count)++;
return S2N_SUCCESS;
}
static S2N_RESULT s2n_setup_conn(struct s2n_connection *conn)
{
conn->actual_protocol_version = S2N_TLS13;
EXPECT_OK(s2n_conn_choose_state_machine(conn, S2N_TLS13));
RESULT_GUARD_POSIX(s2n_stuffer_wipe(&input_stuffer));
RESULT_GUARD_POSIX(s2n_stuffer_wipe(&output_stuffer));
RESULT_GUARD_POSIX(s2n_connection_set_io_stuffers(&input_stuffer, &output_stuffer, conn));
return S2N_RESULT_OK;
}
static S2N_RESULT s2n_setup_conn_for_client_hello(struct s2n_connection *conn)
{
RESULT_GUARD(s2n_setup_conn(conn));
conn->handshake.handshake_type = INITIAL;
conn->handshake.message_number = 0;
RESULT_ENSURE_EQ(s2n_conn_get_current_message_type(conn), CLIENT_HELLO);
return S2N_RESULT_OK;
}
static S2N_RESULT s2n_setup_conn_for_server_hello(struct s2n_connection *conn)
{
RESULT_GUARD(s2n_setup_conn(conn));
/* Use arbitrary cipher suite */
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Setup secrets */
const struct s2n_ecc_preferences *ecc_preferences = NULL;
RESULT_GUARD_POSIX(s2n_connection_get_ecc_preferences(conn, &ecc_preferences));
conn->kex_params.server_ecc_evp_params.negotiated_curve = ecc_preferences->ecc_curves[0];
conn->kex_params.client_ecc_evp_params.negotiated_curve = ecc_preferences->ecc_curves[0];
if (conn->kex_params.server_ecc_evp_params.evp_pkey == NULL) {
RESULT_GUARD_POSIX(s2n_ecc_evp_generate_ephemeral_key(&conn->kex_params.server_ecc_evp_params));
}
if (conn->kex_params.client_ecc_evp_params.evp_pkey == NULL) {
RESULT_GUARD_POSIX(s2n_ecc_evp_generate_ephemeral_key(&conn->kex_params.client_ecc_evp_params));
}
/* Set handshake to write message */
conn->handshake.handshake_type = NEGOTIATED | FULL_HANDSHAKE;
conn->handshake.message_number = 1;
RESULT_ENSURE_EQ(s2n_conn_get_current_message_type(conn), SERVER_HELLO);
return S2N_RESULT_OK;
}
static S2N_RESULT s2n_write_test_message(struct s2n_blob *out, message_type_t message_type)
{
RESULT_GUARD_POSIX(s2n_alloc(out, TEST_DATA_SIZE + TLS_HANDSHAKE_HEADER_LENGTH));
struct s2n_stuffer stuffer = { 0 };
RESULT_GUARD_POSIX(s2n_stuffer_init(&stuffer, out));
RESULT_GUARD_POSIX(s2n_stuffer_write_uint8(&stuffer, message_type));
RESULT_GUARD_POSIX(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
RESULT_GUARD_POSIX(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE));
return S2N_RESULT_OK;
}
static int s2n_test_write_handler(struct s2n_connection *conn)
{
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&conn->handshake.io, TEST_DATA, TEST_DATA_SIZE));
return S2N_SUCCESS;
}
static int s2n_test_read_handler(struct s2n_connection *conn)
{
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->handshake.io), TEST_DATA_SIZE);
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&conn->handshake.io, TEST_DATA_SIZE),
TEST_DATA, TEST_DATA_SIZE);
return S2N_SUCCESS;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
if (!s2n_is_tls13_fully_supported()) {
END_TEST();
}
/* Test: s2n_quic_write_handshake_message */
{
/* Safety checks */
EXPECT_ERROR(s2n_quic_write_handshake_message(NULL));
/* Writes handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
uint8_t message_data[] = "The client says hello";
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&conn->handshake.io, message_data, sizeof(message_data)));
EXPECT_OK(s2n_quic_write_handshake_message(conn));
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->out), sizeof(message_data));
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&conn->out, sizeof(message_data)),
message_data, sizeof(message_data));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
};
/* Test: s2n_quic_read_handshake_message */
{
/* Safety checks */
{
struct s2n_connection conn = { 0 };
uint8_t message_type = 0;
EXPECT_ERROR(s2n_quic_read_handshake_message(NULL, &message_type));
EXPECT_ERROR(s2n_quic_read_handshake_message(&conn, NULL));
};
/* Reads basic handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
uint8_t expected_message_type = 7;
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, expected_message_type));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE));
uint8_t actual_message_type = 0;
EXPECT_OK(s2n_quic_read_handshake_message(conn, &actual_message_type));
EXPECT_EQUAL(actual_message_type, expected_message_type);
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->handshake.io), TLS_HANDSHAKE_HEADER_LENGTH);
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->in), TEST_DATA_SIZE);
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&conn->in, TEST_DATA_SIZE),
TEST_DATA, sizeof(TEST_DATA));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Blocks on insufficient data for handshake message header */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
uint8_t actual_message_type = 0;
EXPECT_ERROR_WITH_ERRNO(s2n_quic_read_handshake_message(conn, &actual_message_type),
S2N_ERR_IO_BLOCKED);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Blocks on insufficient data for handshake message data */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE - 1));
uint8_t actual_message_type = 0;
EXPECT_ERROR_WITH_ERRNO(s2n_quic_read_handshake_message(conn, &actual_message_type),
S2N_ERR_IO_BLOCKED);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Fails for an impossibly large handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, S2N_MAXIMUM_HANDSHAKE_MESSAGE_LENGTH + 1));
uint8_t actual_message_type = 0;
EXPECT_ERROR_WITH_ERRNO(s2n_quic_read_handshake_message(conn, &actual_message_type),
S2N_ERR_BAD_MESSAGE);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Succeeds for a handshake message larger than the input buffer */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
uint8_t actual_message_type = 0;
/* Read a small message to initialize the input buffer */
const size_t small_message_size = 10;
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, small_message_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&stuffer, small_message_size));
EXPECT_OK(s2n_quic_read_handshake_message(conn, &actual_message_type));
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->in), small_message_size);
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->handshake.io));
EXPECT_OK(s2n_record_wipe(conn));
const size_t max_buffer_size = s2n_stuffer_space_remaining(&conn->buffer_in);
EXPECT_TRUE(max_buffer_size > small_message_size);
/* Read a large message to force the input buffer to resize */
const size_t large_message_size = max_buffer_size + 10;
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, large_message_size));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&stuffer, large_message_size));
EXPECT_OK(s2n_quic_read_handshake_message(conn, &actual_message_type));
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->in), large_message_size);
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->handshake.io));
EXPECT_OK(s2n_record_wipe(conn));
const size_t resized_buffer_size = s2n_stuffer_space_remaining(&conn->buffer_in);
EXPECT_TRUE(resized_buffer_size >= large_message_size);
/* Read another message to check that the resize doesn't prevent future reads */
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE));
EXPECT_OK(s2n_quic_read_handshake_message(conn, &actual_message_type));
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->in), TEST_DATA_SIZE);
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&conn->in, TEST_DATA_SIZE),
TEST_DATA, sizeof(TEST_DATA));
};
/* Succeeds for multiple messages */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
uint8_t actual_message_type = 0;
size_t expected_buffer_size = 0;
for (size_t i = 0; i < 100; i++) {
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, 7));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE));
EXPECT_OK(s2n_quic_read_handshake_message(conn, &actual_message_type));
EXPECT_EQUAL(s2n_stuffer_data_available(&conn->in), TEST_DATA_SIZE);
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&conn->in, TEST_DATA_SIZE),
TEST_DATA, sizeof(TEST_DATA));
EXPECT_SUCCESS(s2n_stuffer_wipe(&conn->handshake.io));
EXPECT_OK(s2n_record_wipe(conn));
/* Ensure buffer size stays constant */
const size_t buffer_size = s2n_stuffer_space_remaining(&conn->buffer_in);
if (i == 0) {
expected_buffer_size = buffer_size;
}
EXPECT_EQUAL(expected_buffer_size, buffer_size);
}
};
};
/* Functional Tests */
{
s2n_blocked_status blocked_status;
/* Use handler stubs to avoid executing complicated handler implementations */
for (size_t i = 0; i < s2n_array_len(tls13_state_machine); i++) {
tls13_state_machine[i].handler[S2N_SERVER] = s2n_test_read_handler;
tls13_state_machine[i].handler[S2N_CLIENT] = s2n_test_write_handler;
}
/* Write test message */
DEFER_CLEANUP(struct s2n_blob server_hello, s2n_free);
EXPECT_OK(s2n_write_test_message(&server_hello, TLS_SERVER_HELLO));
/* Setup IO buffers */
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input_stuffer, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output_stuffer, 0));
/* Setup config */
struct s2n_config *config = NULL;
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_enable_quic(config));
/* Functional: successfully reads full handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_server_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
EXPECT_SUCCESS(s2n_stuffer_write(&input_stuffer, &server_hello));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), ENCRYPTED_EXTENSIONS);
EXPECT_EQUAL(s2n_stuffer_data_available(&input_stuffer), 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Functional: successfully reads fragmented handshake message */
for (size_t i = 1; i < server_hello.size - 1; i++) {
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_server_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Write initial fragment */
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&input_stuffer, server_hello.data, i));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), SERVER_HELLO);
EXPECT_EQUAL(s2n_stuffer_data_available(&input_stuffer), 0);
/* Write rest of message */
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&input_stuffer,
server_hello.data + i, server_hello.size - i));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), ENCRYPTED_EXTENSIONS);
EXPECT_EQUAL(s2n_stuffer_data_available(&input_stuffer), 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
}
/* Functional: successfully reads multiple handshake messages */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_server_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
DEFER_CLEANUP(struct s2n_blob encrypted_extensions, s2n_free);
EXPECT_OK(s2n_write_test_message(&encrypted_extensions, TLS_ENCRYPTED_EXTENSIONS));
EXPECT_SUCCESS(s2n_stuffer_write(&input_stuffer, &server_hello));
EXPECT_SUCCESS(s2n_stuffer_write(&input_stuffer, &encrypted_extensions));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), SERVER_CERT);
EXPECT_EQUAL(s2n_stuffer_data_available(&input_stuffer), 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Function: fails to read record instead of handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_server_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Write the record: record type, protocol version,
* handshake message size, handshake message */
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, TLS_HANDSHAKE));
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, 3));
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, 3));
POSIX_GUARD(s2n_stuffer_write_uint16(&input_stuffer, server_hello.size));
EXPECT_SUCCESS(s2n_stuffer_write(&input_stuffer, &server_hello));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_BAD_MESSAGE);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Function: fails to read Change Cipher Spec record */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_server_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Write the record: record type, protocol version,
* record data size, standard "0x01" record data */
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, TLS_CHANGE_CIPHER_SPEC));
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, 3));
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, 3));
POSIX_GUARD(s2n_stuffer_write_uint16(&input_stuffer, 1));
POSIX_GUARD(s2n_stuffer_write_uint8(&input_stuffer, 1));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_BAD_MESSAGE);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
uint32_t client_hello_length = 0;
/* Functional: successfully writes full handshake message */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_client_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
client_hello_length = s2n_stuffer_data_available(&output_stuffer);
uint8_t actual_message_type = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint8(&output_stuffer, &actual_message_type));
EXPECT_EQUAL(actual_message_type, TLS_CLIENT_HELLO);
uint32_t actual_message_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint24(&output_stuffer, &actual_message_size));
EXPECT_EQUAL(actual_message_size, TEST_DATA_SIZE);
EXPECT_EQUAL(s2n_stuffer_data_available(&output_stuffer), TEST_DATA_SIZE);
EXPECT_BYTEARRAY_EQUAL(s2n_stuffer_raw_read(&output_stuffer, TEST_DATA_SIZE),
TEST_DATA, TEST_DATA_SIZE);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), SERVER_HELLO);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Functional: successfully retries after blocked write */
{
struct s2n_connection *conn = NULL;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
EXPECT_OK(s2n_setup_conn_for_client_hello(conn));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Sabotage the output stuffer to block writing */
struct s2n_stuffer bad_stuffer = { 0 };
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&input_stuffer, &bad_stuffer, conn));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), CLIENT_HELLO);
EXPECT_EQUAL(s2n_stuffer_data_available(&output_stuffer), 0);
/* Fix the output stuffer */
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&input_stuffer, &output_stuffer, conn));
EXPECT_FAILURE_WITH_ERRNO(s2n_negotiate(conn, &blocked_status), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(s2n_conn_get_current_message_type(conn), SERVER_HELLO);
EXPECT_EQUAL(s2n_stuffer_data_available(&output_stuffer), client_hello_length);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
EXPECT_SUCCESS(s2n_stuffer_free(&input_stuffer));
EXPECT_SUCCESS(s2n_stuffer_free(&output_stuffer));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test: s2n_recv_quic_post_handshake_message */
{
/* Safety checks */
s2n_blocked_status blocked = 0;
EXPECT_FAILURE(s2n_recv_quic_post_handshake_message(NULL, &blocked));
/* Parsable session ticket message */
uint8_t ticket_message_bytes[] = {
TLS_SERVER_NEW_SESSION_TICKET,
0x00, 0x00, 0x12, /* message size */
TEST_LIFETIME, /* ticket lifetime */
TEST_TICKET_AGE_ADD, /* ticket age add */
0x02, /* nonce len */
0x00, 0x00, /* nonce */
0x00, 0x03, /* ticket len */
TEST_TICKET, /* ticket */
0x00, 0x00, /* extensions len */
};
/* Test: fails to read post-handshake message that is not a ST */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
/* Create a post-handshake message that isn't supported by quic */
EXPECT_SUCCESS(s2n_stuffer_write_uint8(&stuffer, TLS_KEY_UPDATE));
EXPECT_SUCCESS(s2n_stuffer_write_uint24(&stuffer, TEST_DATA_SIZE));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, TEST_DATA, TEST_DATA_SIZE));
EXPECT_FAILURE_WITH_ERRNO(s2n_recv_quic_post_handshake_message(conn, &blocked), S2N_ERR_UNSUPPORTED_WITH_QUIC);
};
/* Test: successfully reads and processes post-handshake message */
{
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT),
s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
uint8_t session_ticket_cb_count = 0;
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, &session_ticket_cb_count));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
/* Construct ST handshake message */
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, ticket_message_bytes, sizeof(ticket_message_bytes)));
EXPECT_SUCCESS(s2n_recv_quic_post_handshake_message(conn, &blocked));
/* Callback was triggered */
EXPECT_EQUAL(session_ticket_cb_count, 1);
};
/* Test: successfully reads and processes fragmented post-handshake message */
for (size_t i = 1; i < sizeof(ticket_message_bytes); i++) {
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT), s2n_connection_ptr_free);
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(), s2n_config_ptr_free);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
uint8_t session_ticket_cb_count = 0;
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, &session_ticket_cb_count));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
/* Mock receiving a fragmented handshake message */
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, ticket_message_bytes, i));
EXPECT_FAILURE_WITH_ERRNO(s2n_recv_quic_post_handshake_message(conn, &blocked), S2N_ERR_IO_BLOCKED);
EXPECT_EQUAL(blocked, S2N_BLOCKED_ON_READ);
/* Callback was not triggered */
EXPECT_EQUAL(session_ticket_cb_count, 0);
/* "Write" the rest of the message */
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&stuffer, ticket_message_bytes + i, sizeof(ticket_message_bytes) - i));
EXPECT_SUCCESS(s2n_recv_quic_post_handshake_message(conn, &blocked));
/* Callback was triggered */
EXPECT_EQUAL(session_ticket_cb_count, 1);
};
}
END_TEST();
}
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