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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_tls.h"
/* To test static functions */
#include "tls/s2n_server_new_session_ticket.c"
#define TEST_TICKET_AGE_ADD 0x01, 0x02, 0x03, 0x04
#define TEST_LIFETIME 0x00, 0x01, 0x01, 0x01
#define TEST_TICKET 0x01, 0xFF, 0x23
#define ONE_HOUR_IN_NANOS 3600000000000
#define TICKET_AGE_ADD_MARKER sizeof(uint8_t) + /* message id */ \
SIZEOF_UINT24 + /* message len */ \
sizeof(uint32_t) /* ticket lifetime */
#define RECORD_LEN_MARKER sizeof(uint8_t) + /* message type */ \
sizeof(uint16_t) /* protocol version */
#define MAX_TEST_SESSION_SIZE 300
#define EXPECT_TICKETS_SENT(conn, count) EXPECT_OK(s2n_assert_tickets_sent(conn, count))
static S2N_RESULT s2n_assert_tickets_sent(struct s2n_connection *conn, uint16_t expected_tickets_sent)
{
uint16_t tickets_sent = 0;
RESULT_GUARD_POSIX(s2n_connection_get_tickets_sent(conn, &tickets_sent));
RESULT_ENSURE_EQ(tickets_sent, expected_tickets_sent);
return S2N_RESULT_OK;
}
size_t cb_session_data_len = 0;
uint8_t cb_session_data[MAX_TEST_SESSION_SIZE] = { 0 };
uint32_t cb_session_lifetime = 0;
static int s2n_test_session_ticket_cb(struct s2n_connection *conn, void *ctx, struct s2n_session_ticket *ticket)
{
POSIX_ENSURE_REF(conn);
POSIX_ENSURE_REF(ticket);
EXPECT_SUCCESS(s2n_session_ticket_get_data_len(ticket, &cb_session_data_len));
EXPECT_SUCCESS(s2n_session_ticket_get_data(ticket, cb_session_data_len, cb_session_data));
EXPECT_SUCCESS(s2n_session_ticket_get_lifetime(ticket, &cb_session_lifetime));
return S2N_SUCCESS;
}
static int s2n_setup_test_ticket_key(struct s2n_config *config)
{
POSIX_ENSURE_REF(config);
/**
*= https://tools.ietf.org/rfc/rfc5869#appendix-A.1
*# PRK = 0x077709362c2e32df0ddc3f0dc47bba63
*# 90b6c73bb50f9c3122ec844ad7c2b3e5 (32 octets)
**/
S2N_BLOB_FROM_HEX(ticket_key,
"077709362c2e32df0ddc3f0dc47bba63"
"90b6c73bb50f9c3122ec844ad7c2b3e5");
/* Set up encryption key */
uint64_t current_time;
uint8_t ticket_key_name[16] = "2016.07.26.15\0";
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(config->wall_clock(config->sys_clock_ctx, ¤t_time));
EXPECT_SUCCESS(s2n_config_add_ticket_crypto_key(config, ticket_key_name, strlen((char *) ticket_key_name),
ticket_key.data, ticket_key.size, current_time / ONE_SEC_IN_NANOS));
return S2N_SUCCESS;
}
static int s2n_setup_test_resumption_secret(struct s2n_connection *conn)
{
POSIX_ENSURE_REF(conn);
/**
*= https://tools.ietf.org/rfc/rfc8448#section-3
*# PRK (32 octets): 7d f2 35 f2 03 1d 2a 05 12 87 d0 2b 02 41 b0 bf
*# da f8 6c c8 56 23 1f 2d 5a ba 46 c4 34 ec 19 6c
**/
S2N_BLOB_FROM_HEX(test_resumption_secret,
"7d f2 35 f2 03 1d 2a 05 12 87 d0 2b 02 41 b0 bf \
da f8 6c c8 56 23 1f 2d 5a ba 46 c4 34 ec 19 6c");
/* Set up resumption secret */
struct s2n_blob secret = { 0 };
struct s2n_stuffer secret_stuffer = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&secret, conn->secrets.version.tls13.resumption_master_secret, S2N_TLS_SECRET_LEN));
EXPECT_SUCCESS(s2n_stuffer_init(&secret_stuffer, &secret));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&secret_stuffer, test_resumption_secret.data, test_resumption_secret.size));
return S2N_SUCCESS;
}
int main(int argc, char **argv)
{
BEGIN_TEST();
/* s2n_tls13_server_nst_write */
{
/* Check session ticket message is correctly written. */
{
struct s2n_config *config;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
uint16_t test_tickets_sent = 10;
conn->tickets_sent = test_tickets_sent;
/* Set up output stuffer */
struct s2n_stuffer output = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_OK(s2n_tls13_server_nst_write(conn, &output));
uint8_t message_type = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint8(&output, &message_type));
EXPECT_EQUAL(TLS_SERVER_NEW_SESSION_TICKET, message_type);
uint32_t message_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint24(&output, &message_size));
EXPECT_EQUAL(message_size, s2n_stuffer_data_available(&output));
uint32_t ticket_lifetime = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint32(&output, &ticket_lifetime));
uint32_t key_lifetime_in_secs =
(S2N_TICKET_ENCRYPT_DECRYPT_KEY_LIFETIME_IN_NANOS + S2N_TICKET_DECRYPT_KEY_LIFETIME_IN_NANOS) / ONE_SEC_IN_NANOS;
EXPECT_EQUAL(key_lifetime_in_secs, ticket_lifetime);
/* Skipping random data */
EXPECT_SUCCESS(s2n_stuffer_skip_read(&output, sizeof(uint32_t)));
uint8_t ticket_nonce_len = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint8(&output, &ticket_nonce_len));
EXPECT_EQUAL(sizeof(uint16_t), ticket_nonce_len);
uint8_t ticket_nonce[sizeof(uint16_t)] = { 0 };
EXPECT_SUCCESS(s2n_stuffer_read_bytes(&output, ticket_nonce, ticket_nonce_len));
uint8_t tickets_sent_array[sizeof(uint16_t)] = { 0 };
struct s2n_blob blob = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&blob, tickets_sent_array, sizeof(uint16_t)));
EXPECT_OK(s2n_generate_ticket_nonce(test_tickets_sent, &blob));
EXPECT_BYTEARRAY_EQUAL(ticket_nonce, blob.data, ticket_nonce_len);
uint16_t session_ticket_len = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&output, &session_ticket_len));
uint8_t size_of_extensions_size = sizeof(uint16_t);
EXPECT_EQUAL(session_ticket_len, (s2n_stuffer_data_available(&output) - size_of_extensions_size));
/* Skipping encrypted ticket data */
EXPECT_SUCCESS(s2n_stuffer_skip_read(&output, session_ticket_len));
uint16_t extensions_len = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&output, &extensions_len));
EXPECT_EQUAL(extensions_len, 0);
EXPECT_EQUAL(s2n_stuffer_data_available(&output), 0);
EXPECT_TRUE(conn->tickets_sent == test_tickets_sent + 1);
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&output));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* tickets_sent overflow */
{
struct s2n_config *config;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
conn->tickets_sent = UINT16_MAX;
/* Set up output stuffer */
struct s2n_stuffer output = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_ERROR_WITH_ERRNO(s2n_tls13_server_nst_write(conn, &output), S2N_ERR_INTEGER_OVERFLOW);
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&output));
EXPECT_SUCCESS(s2n_config_free(config));
};
/** ticket_age_add values do not repeat after sending multiple new session tickets
*= https://tools.ietf.org/rfc/rfc8446#section-4.6.1
*= type=test
*# The server MUST generate a fresh value
*# for each ticket it sends.
**/
{
struct s2n_config *config;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
/* Set up output stuffer */
struct s2n_stuffer output = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_OK(s2n_tls13_server_nst_write(conn, &output));
uint32_t original_ticket_age_add = 0;
EXPECT_SUCCESS(s2n_stuffer_skip_read(&output, TICKET_AGE_ADD_MARKER));
EXPECT_SUCCESS(s2n_stuffer_read_uint32(&output, &original_ticket_age_add));
EXPECT_SUCCESS(s2n_stuffer_wipe(&output));
EXPECT_OK(s2n_tls13_server_nst_write(conn, &output));
uint32_t new_ticket_age_add = 0;
EXPECT_SUCCESS(s2n_stuffer_skip_read(&output, TICKET_AGE_ADD_MARKER));
EXPECT_SUCCESS(s2n_stuffer_read_uint32(&output, &new_ticket_age_add));
EXPECT_NOT_EQUAL(original_ticket_age_add, new_ticket_age_add);
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&output));
EXPECT_SUCCESS(s2n_config_free(config));
}
/* Test that the message written by the server includes extensions.
* Specifically, check for the early_data_indication extension. */
{
const uint32_t expected_max_early_data_size = 10;
/* Calculate extension list offset. Extension list should be last. */
const uint32_t extension_list_offset = sizeof(uint32_t) /* max_early_data_size */
+ sizeof(uint16_t) /* size of extension */
+ sizeof(uint16_t); /* type of extension */
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
EXPECT_SUCCESS(s2n_connection_set_server_max_early_data_size(conn, expected_max_early_data_size));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
struct s2n_stuffer output = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_OK(s2n_tls13_server_nst_write(conn, &output));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&output,
s2n_stuffer_data_available(&output) - extension_list_offset));
uint16_t extension_type = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&output, &extension_type));
EXPECT_EQUAL(extension_type, TLS_EXTENSION_EARLY_DATA);
uint16_t extension_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&output, &extension_size));
EXPECT_EQUAL(extension_size, sizeof(uint32_t));
uint32_t actual_max_early_data_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint32(&output, &actual_max_early_data_size));
EXPECT_EQUAL(actual_max_early_data_size, expected_max_early_data_size);
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&output));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Can't write ticket larger than allowed size of a PSK identity */
{
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
server_conn->actual_protocol_version = S2N_TLS13;
server_conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
EXPECT_SUCCESS(s2n_connection_set_server_max_early_data_size(server_conn, 10));
/* Set context to be UINT16_MAX */
uint8_t early_data_context[UINT16_MAX] = { 0 };
EXPECT_SUCCESS(s2n_connection_set_server_early_data_context(server_conn,
early_data_context, sizeof(early_data_context)));
DEFER_CLEANUP(struct s2n_stuffer stuffer = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_ERROR_WITH_ERRNO(s2n_tls13_server_nst_write(server_conn, &stuffer), S2N_ERR_SIZE_MISMATCH);
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
};
/* s2n_generate_ticket_lifetime */
{
uint32_t min_lifetime = 0;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
/* Test: encrypt + decrypt key has shortest lifetime */
conn->config->encrypt_decrypt_key_lifetime_in_nanos = ONE_HOUR_IN_NANOS;
conn->config->decrypt_key_lifetime_in_nanos = ONE_HOUR_IN_NANOS;
conn->config->session_state_lifetime_in_nanos = ONE_HOUR_IN_NANOS * 3;
EXPECT_OK(s2n_generate_ticket_lifetime(conn, &min_lifetime));
EXPECT_EQUAL(min_lifetime, (ONE_HOUR_IN_NANOS * 2) / ONE_SEC_IN_NANOS);
/* Test: Session state has shortest lifetime */
conn->config->encrypt_decrypt_key_lifetime_in_nanos = ONE_HOUR_IN_NANOS;
conn->config->decrypt_key_lifetime_in_nanos = ONE_HOUR_IN_NANOS;
conn->config->session_state_lifetime_in_nanos = ONE_HOUR_IN_NANOS;
EXPECT_OK(s2n_generate_ticket_lifetime(conn, &min_lifetime));
EXPECT_EQUAL(min_lifetime, ONE_HOUR_IN_NANOS / ONE_SEC_IN_NANOS);
/** Test: Both session state and decrypt key have longer lifetimes than a week
*= https://tools.ietf.org/rfc/rfc8446#section-4.6.1
*= type=test
*# Servers MUST NOT use any value greater than
*# 604800 seconds (7 days).
**/
/* Note: We turn these integer literals into uint64_t values because otherwise
* they will be interpreted as uint32_t values and an faulty integer overflow error
* will be thrown. */
uint64_t one_week_in_sec = ONE_WEEK_IN_SEC;
uint64_t one_sec_in_nanos = ONE_SEC_IN_NANOS;
uint64_t one_week_in_nanos = one_week_in_sec * one_sec_in_nanos;
conn->config->encrypt_decrypt_key_lifetime_in_nanos = one_week_in_nanos;
conn->config->decrypt_key_lifetime_in_nanos = one_week_in_nanos;
conn->config->session_state_lifetime_in_nanos = one_week_in_nanos + 1;
EXPECT_OK(s2n_generate_ticket_lifetime(conn, &min_lifetime));
EXPECT_EQUAL(min_lifetime, ONE_WEEK_IN_SEC);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* s2n_generate_ticket_nonce */
{
struct {
uint16_t value;
uint8_t expected_output[2];
} test_cases[] = {
{ .value = 0, .expected_output = { 0, 0 } },
{ .value = 1, .expected_output = { 0, 1 } },
{ .value = 20, .expected_output = { 0, 20 } },
{ .value = UINT8_MAX, .expected_output = { 0, UINT8_MAX } },
{ .value = UINT8_MAX + 1, .expected_output = { 1, 0 } },
{ .value = UINT16_MAX, .expected_output = { UINT8_MAX, UINT8_MAX } },
{ .value = UINT16_MAX - 1, .expected_output = { UINT8_MAX, UINT8_MAX - 1 } },
};
for (size_t i = 0; i < s2n_array_len(test_cases); i++) {
uint8_t data[sizeof(uint16_t)] = { 0 };
struct s2n_blob blob = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&blob, data, sizeof(data)));
EXPECT_OK(s2n_generate_ticket_nonce(test_cases[i].value, &blob));
EXPECT_EQUAL(test_cases[i].expected_output[0], data[0]);
EXPECT_EQUAL(test_cases[i].expected_output[1], data[1]);
}
};
/* s2n_generate_ticket_age_add */
{
struct {
uint8_t value[4];
uint32_t expected_output;
} test_cases[] = {
{ .value = { 0, 0, 0, 0 }, .expected_output = 0 },
{ .value = { 0, 0, 0, 1 }, .expected_output = 1 },
{ .value = { 0, 0, 0, 20 }, .expected_output = 20 },
{ .value = { 0, 0, 1, 0 }, .expected_output = UINT8_MAX + 1 },
{ .value = { 0, 1, 0, 0 }, .expected_output = UINT16_MAX + 1 },
{ .value = { 0, 0, UINT8_MAX, UINT8_MAX }, .expected_output = UINT16_MAX },
{ .value = { UINT8_MAX, UINT8_MAX, UINT8_MAX, UINT8_MAX }, .expected_output = UINT32_MAX },
{ .value = { UINT8_MAX, UINT8_MAX, UINT8_MAX, UINT8_MAX - 1 }, .expected_output = UINT32_MAX - 1 },
};
for (size_t i = 0; i < s2n_array_len(test_cases); i++) {
uint32_t output = 0;
struct s2n_blob blob = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&blob, test_cases[i].value, sizeof(test_cases[i].value)));
EXPECT_OK(s2n_generate_ticket_age_add(&blob, &output));
EXPECT_EQUAL(output, test_cases[i].expected_output);
}
};
/* s2n_generate_session_secret */
{
/**
*= https://tools.ietf.org/rfc/rfc8448#section-3
*# expanded (32 octets): 4e cd 0e b6 ec 3b 4d 87 f5 d6 02 8f 92 2c
*# a4 c5 85 1a 27 7f d4 13 11 c9 e6 2d 2c 94 92 e1 c4 f3
**/
/* clang-format off */
S2N_BLOB_FROM_HEX(expected_session_secret,
"4e cd 0e b6 ec 3b 4d 87 f5 d6 02 8f 92 2c \
a4 c5 85 1a 27 7f d4 13 11 c9 e6 2d 2c 94 92 e1 c4 f3");
/* clang-format on */
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
EXPECT_SUCCESS(s2n_setup_test_resumption_secret(conn));
uint8_t nonce_data[sizeof(uint16_t)] = { 0 };
struct s2n_blob nonce = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&nonce, nonce_data, sizeof(nonce_data)));
struct s2n_blob *output = &conn->tls13_ticket_fields.session_secret;
EXPECT_SUCCESS(s2n_generate_session_secret(conn, &nonce, output));
EXPECT_EQUAL(output->size, expected_session_secret.size);
EXPECT_BYTEARRAY_EQUAL(output->data, expected_session_secret.data, expected_session_secret.size);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* s2n_tls13_server_nst_recv */
{
uint8_t test_ticket[] = { TEST_TICKET };
uint8_t nst_data[] = {
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 */
};
/* Does not read ticket message if config->use_tickets is not set */
{
struct s2n_config *config = s2n_config_new();
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* Set up input stuffer */
DEFER_CLEANUP(struct s2n_stuffer input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
struct s2n_blob nst_message = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&nst_message, nst_data, sizeof(nst_data)));
EXPECT_SUCCESS(s2n_stuffer_write(&input, &nst_message));
EXPECT_OK(s2n_tls13_server_nst_recv(conn, &input));
EXPECT_EQUAL(conn->client_ticket.size, 0);
EXPECT_TRUE(s2n_stuffer_data_available(&input) > 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Not allowed in TLS1.2 */
{
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
conn->actual_protocol_version = S2N_TLS12;
/* Set up input stuffer */
DEFER_CLEANUP(struct s2n_stuffer input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
struct s2n_blob nst_message = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&nst_message, nst_data, sizeof(nst_data)));
EXPECT_SUCCESS(s2n_stuffer_write(&input, &nst_message));
EXPECT_ERROR_WITH_ERRNO(s2n_tls13_server_nst_recv(conn, &input), S2N_ERR_BAD_MESSAGE);
EXPECT_EQUAL(conn->client_ticket.size, 0);
EXPECT_TRUE(s2n_stuffer_data_available(&input) > 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Tests session_ticket_cb correctly serializes session data from an arbitrary new session ticket message */
{
struct s2n_config *config = s2n_config_new();
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Set up input stuffer */
struct s2n_stuffer input = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
struct s2n_blob nst_message = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&nst_message, nst_data, sizeof(nst_data)));
EXPECT_SUCCESS(s2n_stuffer_write(&input, &nst_message));
EXPECT_OK(s2n_tls13_server_nst_recv(conn, &input));
EXPECT_BYTEARRAY_EQUAL(conn->client_ticket.data, test_ticket, sizeof(test_ticket));
EXPECT_EQUAL(s2n_stuffer_data_available(&input), 0);
/* Initialize a stuffer to examine the serialized data returned in the session ticket callback */
struct s2n_blob session_blob = { 0 };
struct s2n_stuffer session_stuffer = { 0 };
EXPECT_SUCCESS(s2n_blob_init(&session_blob, cb_session_data, cb_session_data_len));
EXPECT_SUCCESS(s2n_stuffer_init(&session_stuffer, &session_blob));
EXPECT_SUCCESS(s2n_stuffer_skip_write(&session_stuffer, cb_session_data_len));
/* Check the serialized ticket is what was in the arbitrary nst message */
{
/* Skip to encrypted ticket size */
EXPECT_SUCCESS((s2n_stuffer_skip_read(&session_stuffer, sizeof(uint8_t))));
uint16_t ticket_size = 0;
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&session_stuffer, &ticket_size));
EXPECT_EQUAL(ticket_size, sizeof(test_ticket));
uint8_t *ticket = s2n_stuffer_raw_read(&session_stuffer, ticket_size);
EXPECT_NOT_NULL(ticket);
EXPECT_BYTEARRAY_EQUAL(ticket, test_ticket, ticket_size);
};
/* Check the serialized ticket_age_add is what was in the arbitrary nst message */
{
uint8_t test_ticket_age_add[] = { TEST_TICKET_AGE_ADD };
uint8_t ticket_age_add_marker = sizeof(uint8_t) + /* client state format */
sizeof(uint8_t) + /* protocol version */
sizeof(uint16_t) + /* cipher suite */
sizeof(uint64_t); /* time */
/* Skip to ticket_age_add */
EXPECT_SUCCESS((s2n_stuffer_skip_read(&session_stuffer, ticket_age_add_marker)));
uint8_t ticket_age_add[sizeof(uint32_t)] = { 0 };
EXPECT_SUCCESS(s2n_stuffer_read_bytes(&session_stuffer, ticket_age_add, sizeof(uint32_t)));
EXPECT_BYTEARRAY_EQUAL(ticket_age_add, test_ticket_age_add, sizeof(uint32_t));
};
/* Check ticket lifetime is what was in the arbitrary nst message */
{
uint8_t test_lifetime[] = { TEST_LIFETIME };
uint32_t expected_lifetime = test_lifetime[3] | (test_lifetime[2] << 8) | (test_lifetime[1] << 16) | (test_lifetime[0] << 24);
EXPECT_EQUAL(expected_lifetime, cb_session_lifetime);
};
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&input));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Known values test */
{
/**
* NewSessionTicket handshake message
*
*= https://tools.ietf.org/rfc/rfc8448#section-3
*# NewSessionTicket (205 octets): 04 00 00 c9 00 00 00 1e fa d6 aa
*# c5 02 00 00 00 b2 2c 03 5d 82 93 59 ee 5f f7 af 4e c9 00 00 00
*# 00 26 2a 64 94 dc 48 6d 2c 8a 34 cb 33 fa 90 bf 1b 00 70 ad 3c
*# 49 88 83 c9 36 7c 09 a2 be 78 5a bc 55 cd 22 60 97 a3 a9 82 11
*# 72 83 f8 2a 03 a1 43 ef d3 ff 5d d3 6d 64 e8 61 be 7f d6 1d 28
*# 27 db 27 9c ce 14 50 77 d4 54 a3 66 4d 4e 6d a4 d2 9e e0 37 25
*# a6 a4 da fc d0 fc 67 d2 ae a7 05 29 51 3e 3d a2 67 7f a5 90 6c
*# 5b 3f 7d 8f 92 f2 28 bd a4 0d da 72 14 70 f9 fb f2 97 b5 ae a6
*# 17 64 6f ac 5c 03 27 2e 97 07 27 c6 21 a7 91 41 ef 5f 7d e6 50
*# 5e 5b fb c3 88 e9 33 43 69 40 93 93 4a e4 d3 57 00 08 00 2a 00
*# 04 00 00 04 00
**/
/* clang-format off */
S2N_BLOB_FROM_HEX(nst_message,
"04 00 00 c9 00 00 00 1e fa d6 aa \
c5 02 00 00 00 b2 2c 03 5d 82 93 59 ee 5f f7 af 4e c9 00 00 00 \
00 26 2a 64 94 dc 48 6d 2c 8a 34 cb 33 fa 90 bf 1b 00 70 ad 3c \
49 88 83 c9 36 7c 09 a2 be 78 5a bc 55 cd 22 60 97 a3 a9 82 11 \
72 83 f8 2a 03 a1 43 ef d3 ff 5d d3 6d 64 e8 61 be 7f d6 1d 28 \
27 db 27 9c ce 14 50 77 d4 54 a3 66 4d 4e 6d a4 d2 9e e0 37 25 \
a6 a4 da fc d0 fc 67 d2 ae a7 05 29 51 3e 3d a2 67 7f a5 90 6c \
5b 3f 7d 8f 92 f2 28 bd a4 0d da 72 14 70 f9 fb f2 97 b5 ae a6 \
17 64 6f ac 5c 03 27 2e 97 07 27 c6 21 a7 91 41 ef 5f 7d e6 50 \
5e 5b fb c3 88 e9 33 43 69 40 93 93 4a e4 d3 57 00 08 00 2a 00 \
04 00 00 04 00");
/* clang-format on */
struct s2n_config *config = s2n_config_new();
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Set up input stuffer */
struct s2n_stuffer input = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, 0));
EXPECT_SUCCESS(s2n_stuffer_write(&input, &nst_message));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&input, sizeof(uint8_t) + SIZEOF_UINT24));
EXPECT_OK(s2n_tls13_server_nst_recv(conn, &input));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_stuffer_free(&input));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Self-talk test */
{
struct s2n_config *config = s2n_config_new();
struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(client_conn);
EXPECT_NOT_NULL(config);
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
client_conn->actual_protocol_version = S2N_TLS13;
server_conn->actual_protocol_version = S2N_TLS13;
client_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
server_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_OK(s2n_tls13_server_nst_write(server_conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, sizeof(uint8_t) + SIZEOF_UINT24));
EXPECT_OK(s2n_tls13_server_nst_recv(client_conn, &stuffer));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test that the client processes extensions.
* Specifically, check for the early_data_indication extension. */
{
const uint32_t expected_max_early_data_size = 17;
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(client_conn);
client_conn->actual_protocol_version = S2N_TLS13;
client_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
server_conn->actual_protocol_version = S2N_TLS13;
server_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
EXPECT_SUCCESS(s2n_connection_set_server_max_early_data_size(server_conn, expected_max_early_data_size));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_EQUAL(client_conn->server_max_early_data_size, 0);
EXPECT_OK(s2n_tls13_server_nst_write(server_conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, sizeof(uint8_t) + SIZEOF_UINT24));
EXPECT_OK(s2n_tls13_server_nst_recv(client_conn, &stuffer));
EXPECT_EQUAL(client_conn->server_max_early_data_size, expected_max_early_data_size);
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test that the client can handle different max_early_data_size values. */
{
const uint32_t expected_max_early_data_sizes[] = { 17, 0, UINT16_MAX, 0, 20, UINT32_MAX, 5, 0 };
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *client_conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(client_conn);
client_conn->actual_protocol_version = S2N_TLS13;
client_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
struct s2n_connection *server_conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(server_conn);
server_conn->actual_protocol_version = S2N_TLS13;
server_conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
for (size_t i = 0; i < s2n_array_len(expected_max_early_data_sizes); i++) {
EXPECT_SUCCESS(s2n_connection_set_server_max_early_data_size(server_conn, expected_max_early_data_sizes[i]));
EXPECT_OK(s2n_tls13_server_nst_write(server_conn, &stuffer));
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, sizeof(uint8_t) + SIZEOF_UINT24));
EXPECT_OK(s2n_tls13_server_nst_recv(client_conn, &stuffer));
EXPECT_EQUAL(client_conn->server_max_early_data_size, expected_max_early_data_sizes[i]);
EXPECT_SUCCESS(s2n_stuffer_wipe(&stuffer));
}
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test that the client rejects tickets with invalid ticket_lifetime */
{
const size_t lifetime_size = sizeof(uint32_t);
const uint8_t *nst_data_without_lifetime = nst_data + lifetime_size;
const size_t nst_data_without_lifetime_size = sizeof(nst_data) - lifetime_size;
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_config_set_session_ticket_cb(config, s2n_test_session_ticket_cb, NULL));
/**
*= https://tools.ietf.org/rfc/rfc8446#section-4.6.1
*= type=test
*# The value of zero indicates that the
*# ticket should be discarded immediately.
*/
{
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
DEFER_CLEANUP(struct s2n_stuffer input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, sizeof(nst_data)));
EXPECT_SUCCESS(s2n_stuffer_write_uint32(&input, 0));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&input, nst_data_without_lifetime, nst_data_without_lifetime_size));
EXPECT_OK(s2n_tls13_server_nst_recv(conn, &input));
/* Verify that the client only got as far as the ticket_lifetime when parsing */
EXPECT_EQUAL(s2n_stuffer_data_available(&input), nst_data_without_lifetime_size);
/* Verify that the client did not accept + store the ticket */
EXPECT_EQUAL(s2n_connection_get_session_length(conn), 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/**
*= https://tools.ietf.org/rfc/rfc8446#section-4.6.1
*= type=test
*# Servers MUST NOT use any value greater than
*# 604800 seconds (7 days).
*/
{
struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
DEFER_CLEANUP(struct s2n_stuffer input = { 0 }, s2n_stuffer_free);
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&input, sizeof(nst_data)));
EXPECT_SUCCESS(s2n_stuffer_write_uint32(&input, UINT32_MAX));
EXPECT_SUCCESS(s2n_stuffer_write_bytes(&input, nst_data_without_lifetime, nst_data_without_lifetime_size));
EXPECT_ERROR_WITH_ERRNO(s2n_tls13_server_nst_recv(conn, &input), S2N_ERR_BAD_MESSAGE);
/* Verify that the client only got as far as the ticket_lifetime when parsing */
EXPECT_EQUAL(s2n_stuffer_data_available(&input), nst_data_without_lifetime_size);
/* Verify that the client did not accept + store the ticket */
EXPECT_EQUAL(s2n_connection_get_session_length(conn), 0);
EXPECT_SUCCESS(s2n_connection_free(conn));
};
EXPECT_SUCCESS(s2n_config_free(config));
};
};
/* s2n_tls13_server_nst_send */
{
/* Mode is not server */
{
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_CLIENT));
conn->actual_protocol_version = S2N_TLS13;
conn->tickets_to_send = 1;
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_ERROR_WITH_ERRNO(s2n_assert_tickets_sent(conn, 0), S2N_ERR_CLIENT_MODE);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
};
/* Protocol is less than TLS13 */
{
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
conn->tickets_to_send = 1;
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));
s2n_blocked_status blocked = 0;
conn->actual_protocol_version = S2N_TLS12;
EXPECT_ERROR(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 0);
conn->actual_protocol_version = S2N_TLS13;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 1);
};
/* 0 tickets are requested */
{
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->tickets_to_send = 0;
EXPECT_NOT_EQUAL(0, s2n_stuffer_space_remaining(&conn->handshake.io));
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
/* Check no tickets are written */
EXPECT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_TICKETS_SENT(conn, 0);
/* Check handshake.io is cleaned up */
EXPECT_EQUAL(0, s2n_stuffer_space_remaining(&conn->handshake.io));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* QUIC mode is enabled */
{
DEFER_CLEANUP(struct s2n_config *config = s2n_config_new(),
s2n_config_ptr_free);
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
DEFER_CLEANUP(struct s2n_connection *conn = s2n_connection_new(S2N_SERVER),
s2n_connection_ptr_free);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
conn->tickets_to_send = 1;
conn->actual_protocol_version = S2N_TLS13;
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));
s2n_blocked_status blocked = 0;
conn->quic_enabled = true;
/* No mutually-supported psk mode agreed upon */
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 0);
/* Client has indicated that it supports both resumption and psk_dhe_ke mode */
conn->psk_params.psk_ke_mode = S2N_PSK_DHE_KE;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 1);
};
/* Sends one new session ticket */
{
struct s2n_config *config;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
conn->tickets_to_send = 1;
EXPECT_NOT_EQUAL(s2n_stuffer_space_remaining(&conn->handshake.io), 0);
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 1);
/* Check only one record was written */
uint16_t record_len = 0;
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, RECORD_LEN_MARKER));
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &record_len));
EXPECT_TRUE(record_len > 0);
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, record_len));
EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Send no more tickets if keying material is expired
*
*= https://tools.ietf.org/rfc/rfc8446#section-4.6.1
*= type=test
*# Note that in principle it is possible to continue issuing new tickets
*# which indefinitely extend the lifetime of the keying material
*# originally derived from an initial non-PSK handshake (which was most
*# likely tied to the peer's certificate). It is RECOMMENDED that
*# implementations place limits on the total lifetime of such keying
*# material; these limits should take into account the lifetime of the
*# peer's certificate, the likelihood of intervening revocation, and the
*# time since the peer's online CertificateVerify signature.
*/
{
const uint8_t current_tickets = 10;
const uint8_t new_tickets = 5;
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->tickets_sent = current_tickets;
conn->tickets_to_send = current_tickets;
EXPECT_TICKETS_SENT(conn, current_tickets);
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
/* Can request new tickets */
EXPECT_SUCCESS(s2n_connection_add_new_tickets_to_send(conn, new_tickets));
EXPECT_EQUAL(conn->tickets_sent, current_tickets);
EXPECT_EQUAL(conn->tickets_to_send, current_tickets + new_tickets);
EXPECT_TICKETS_SENT(conn, current_tickets);
/* Add expired keying material */
DEFER_CLEANUP(struct s2n_psk *chosen_psk = s2n_test_psk_new(conn), s2n_psk_free);
EXPECT_NOT_NULL(chosen_psk);
chosen_psk->type = S2N_PSK_TYPE_RESUMPTION;
chosen_psk->keying_material_expiration = 0;
conn->psk_params.chosen_psk = chosen_psk;
/* Despite tickets requested, no tickets sent */
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_EQUAL(s2n_stuffer_data_available(&stuffer), 0);
EXPECT_EQUAL(conn->tickets_sent, current_tickets);
EXPECT_EQUAL(conn->tickets_to_send, current_tickets);
EXPECT_TICKETS_SENT(conn, current_tickets);
/* Can't request more tickets */
EXPECT_FAILURE_WITH_ERRNO(s2n_connection_add_new_tickets_to_send(conn, new_tickets),
S2N_ERR_KEYING_MATERIAL_EXPIRED);
EXPECT_EQUAL(conn->tickets_sent, current_tickets);
EXPECT_EQUAL(conn->tickets_to_send, current_tickets);
EXPECT_TICKETS_SENT(conn, current_tickets);
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* s2n_config_set_session_tickets_onoff used to enable tickets */
{
uint8_t test_data[S2N_TICKET_KEY_NAME_LEN] = "data";
uint64_t current_time = 0;
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, true));
EXPECT_SUCCESS(config->wall_clock(config->sys_clock_ctx, ¤t_time));
EXPECT_SUCCESS(s2n_config_add_ticket_crypto_key(config, test_data, sizeof(test_data),
test_data, sizeof(test_data), current_time / ONE_SEC_IN_NANOS));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 1);
EXPECT_NOT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_wipe(&stuffer));
/* Request more tickets */
EXPECT_SUCCESS(s2n_connection_add_new_tickets_to_send(conn, 1));
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 2);
EXPECT_NOT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_wipe(&stuffer));
/* Turn tickets off */
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, false));
/* Request more tickets */
EXPECT_SUCCESS(s2n_connection_add_new_tickets_to_send(conn, 1));
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 2);
EXPECT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* s2n_config_set_initial_ticket_count used to enable tickets */
{
uint8_t test_data[S2N_TICKET_KEY_NAME_LEN] = "data";
uint64_t current_time = 0;
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_config_set_initial_ticket_count(config, 1));
EXPECT_SUCCESS(config->wall_clock(config->sys_clock_ctx, ¤t_time));
EXPECT_SUCCESS(s2n_config_add_ticket_crypto_key(config, test_data, sizeof(test_data),
test_data, sizeof(test_data), current_time / ONE_SEC_IN_NANOS));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, 1);
EXPECT_NOT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Sends multiple new session tickets */
{
struct s2n_config *config;
struct s2n_connection *conn;
EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER));
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
conn->actual_protocol_version = S2N_TLS13;
conn->secure->cipher_suite = &s2n_tls13_aes_128_gcm_sha256;
uint16_t tickets_to_send = 5;
conn->tickets_to_send = tickets_to_send;
/* Setup io */
struct s2n_stuffer stuffer = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&stuffer, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&stuffer, &stuffer, conn));
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_TICKETS_SENT(conn, tickets_to_send);
/* Check five records were written */
uint16_t record_len = 0;
for (size_t i = 0; i < tickets_to_send; i++) {
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, RECORD_LEN_MARKER));
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&stuffer, &record_len));
EXPECT_TRUE(record_len > 0);
EXPECT_SUCCESS(s2n_stuffer_skip_read(&stuffer, record_len));
}
EXPECT_TRUE(s2n_stuffer_data_available(&stuffer) == 0);
/* No more tickets to send */
EXPECT_SUCCESS(s2n_stuffer_rewrite(&stuffer));
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_EQUAL(0, s2n_stuffer_data_available(&stuffer));
EXPECT_SUCCESS(s2n_stuffer_free(&stuffer));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
/* Test S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE */
{
struct s2n_config *config = s2n_config_new();
EXPECT_NOT_NULL(config);
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
struct s2n_connection *conn = s2n_connection_new(S2N_SERVER);
EXPECT_NOT_NULL(conn);
EXPECT_SUCCESS(s2n_connection_set_config(conn, config));
/* TLS1.3 tickets contain extra fields */
conn->actual_protocol_version = S2N_TLS13;
/* Largest possible TLS1.3 secret size */
conn->secure->cipher_suite = &s2n_tls13_aes_256_gcm_sha384;
/* Necessary for extensions, which contribute to size */
EXPECT_SUCCESS(s2n_connection_set_server_max_early_data_size(conn, 10));
/* Setup io */
struct s2n_stuffer output = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&output, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&output, &output, conn));
/* Test with no variable fields */
{
size_t session_state_size = 0;
EXPECT_OK(s2n_connection_get_session_state_size(conn, &session_state_size));
EXPECT_NOT_EQUAL(session_state_size, 0);
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_NOT_EQUAL(s2n_stuffer_data_available(&output), 0);
uint32_t expected_max_size = s2n_stuffer_data_available(&output) - S2N_TLS_RECORD_HEADER_LENGTH;
uint32_t expected_max_fixed_size = expected_max_size - session_state_size;
if (S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE != expected_max_fixed_size) {
fprintf(stdout, "\nS2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE (%i) should be %u\n",
(int) S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE, expected_max_fixed_size);
}
EXPECT_EQUAL(S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE, expected_max_fixed_size);
};
EXPECT_SUCCESS(s2n_stuffer_wipe(&output));
conn->tickets_to_send++;
/* Test with some variable fields */
{
const uint8_t early_data_context[] = "early data context";
EXPECT_SUCCESS(s2n_connection_set_server_early_data_context(conn,
early_data_context, sizeof(early_data_context)));
size_t session_state_size = 0;
EXPECT_OK(s2n_connection_get_session_state_size(conn, &session_state_size));
EXPECT_NOT_EQUAL(session_state_size, 0);
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_NOT_EQUAL(s2n_stuffer_data_available(&output), 0);
uint32_t expected_max_size = s2n_stuffer_data_available(&output) - S2N_TLS_RECORD_HEADER_LENGTH;
uint32_t expected_max_fixed_size = expected_max_size - session_state_size;
EXPECT_EQUAL(S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE, expected_max_fixed_size);
};
EXPECT_SUCCESS(s2n_stuffer_wipe(&output));
conn->tickets_to_send++;
/* Test with all variable fields */
{
const uint8_t early_data_context[] = "different early data context";
EXPECT_SUCCESS(s2n_connection_set_server_early_data_context(conn,
early_data_context, sizeof(early_data_context)));
const uint8_t app_protocol[] = "https";
EXPECT_MEMCPY_SUCCESS(conn->application_protocol, app_protocol, sizeof(app_protocol));
size_t session_state_size = 0;
EXPECT_OK(s2n_connection_get_session_state_size(conn, &session_state_size));
EXPECT_NOT_EQUAL(session_state_size, 0);
s2n_blocked_status blocked = 0;
EXPECT_OK(s2n_tls13_server_nst_send(conn, &blocked));
EXPECT_NOT_EQUAL(s2n_stuffer_data_available(&output), 0);
uint32_t expected_max_size = s2n_stuffer_data_available(&output) - S2N_TLS_RECORD_HEADER_LENGTH;
uint32_t expected_max_fixed_size = expected_max_size - session_state_size;
EXPECT_EQUAL(S2N_TLS13_MAX_FIXED_NEW_SESSION_TICKET_SIZE, expected_max_fixed_size);
};
EXPECT_SUCCESS(s2n_stuffer_free(&output));
EXPECT_SUCCESS(s2n_connection_free(conn));
EXPECT_SUCCESS(s2n_config_free(config));
};
};
/* Functional test: s2n_negotiate sends new session tickets after the handshake is complete */
if (s2n_is_tls13_fully_supported()) {
/* Setup connections */
struct s2n_connection *client_conn, *server_conn;
EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT));
EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER));
/* Setup config */
struct s2n_cert_chain_and_key *chain_and_key;
EXPECT_SUCCESS(s2n_test_cert_chain_and_key_new(&chain_and_key,
S2N_DEFAULT_ECDSA_TEST_CERT_CHAIN, S2N_DEFAULT_ECDSA_TEST_PRIVATE_KEY));
struct s2n_config *config;
EXPECT_NOT_NULL(config = s2n_config_new());
EXPECT_SUCCESS(s2n_config_set_cipher_preferences(config, "default_tls13"));
EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(config));
EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(config, chain_and_key));
EXPECT_SUCCESS(s2n_config_set_session_tickets_onoff(config, 1));
EXPECT_SUCCESS(s2n_connection_set_config(client_conn, config));
EXPECT_SUCCESS(s2n_setup_test_ticket_key(config));
EXPECT_SUCCESS(s2n_connection_set_config(server_conn, config));
uint16_t tickets_to_send = 5;
server_conn->tickets_to_send = tickets_to_send;
struct s2n_stuffer client_to_server = { 0 };
struct s2n_stuffer server_to_client = { 0 };
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&client_to_server, 0));
EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_to_client, 0));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&server_to_client, &client_to_server, client_conn));
EXPECT_SUCCESS(s2n_connection_set_io_stuffers(&client_to_server, &server_to_client, server_conn));
/* Do handshake */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_TICKETS_SENT(server_conn, tickets_to_send);
/* Check handshake.io was cleaned up.
* If a ticket was written, this happens afterwards. */
EXPECT_EQUAL(s2n_stuffer_space_remaining(&server_conn->handshake.io), 0);
EXPECT_EQUAL(s2n_stuffer_space_remaining(&client_conn->handshake.io), 0);
/* Check there are five records corresponding to five new session tickets
* not read as part of the handshake */
uint16_t record_len = 0;
for (size_t i = 0; i < tickets_to_send; i++) {
EXPECT_SUCCESS(s2n_stuffer_skip_read(&server_to_client, RECORD_LEN_MARKER));
EXPECT_SUCCESS(s2n_stuffer_read_uint16(&server_to_client, &record_len));
EXPECT_TRUE(record_len > 0);
EXPECT_SUCCESS(s2n_stuffer_skip_read(&server_to_client, record_len));
}
EXPECT_TRUE(s2n_stuffer_data_available(&server_to_client) == 0);
/* Call s2n_negotiate again to ensure no more tickets are sent */
EXPECT_SUCCESS(s2n_negotiate_test_server_and_client(server_conn, client_conn));
EXPECT_EQUAL(0, s2n_stuffer_data_available(&server_to_client));
EXPECT_TICKETS_SENT(server_conn, tickets_to_send);
EXPECT_SUCCESS(s2n_stuffer_free(&client_to_server));
EXPECT_SUCCESS(s2n_stuffer_free(&server_to_client));
EXPECT_SUCCESS(s2n_connection_free(server_conn));
EXPECT_SUCCESS(s2n_connection_free(client_conn));
EXPECT_SUCCESS(s2n_cert_chain_and_key_free(chain_and_key));
EXPECT_SUCCESS(s2n_config_free(config));
}
END_TEST();
}
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