/* * 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 #include #include #include "crypto/s2n_fips.h" #include "tls/s2n_cipher_suites.h" #include "tls/s2n_connection.h" #include "tls/s2n_handshake.h" #include "tls/s2n_tls13.h" #include "tls/s2n_tls13_handshake.h" #include "tls/extensions/s2n_server_key_share.h" #include "tls/extensions/s2n_client_key_share.h" #include "tls/s2n_security_policies.h" #include "utils/s2n_safety.h" /* Just to get access to the static functions / variables we need to test */ #include "tls/s2n_handshake_io.c" #include "tls/s2n_tls13_handshake.c" #include "tls/s2n_handshake_transcript.c" static int s2n_tls13_conn_copy_server_finished_hash(struct s2n_connection *conn); int main(int argc, char **argv) { BEGIN_TEST(); EXPECT_SUCCESS(s2n_enable_tls13()); /* Test: TLS 1.3 key and secrets generation is symmetrical */ { struct s2n_connection *client_conn; struct s2n_connection *server_conn; EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT)); EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER)); client_conn->actual_protocol_version = S2N_TLS13; server_conn->actual_protocol_version = S2N_TLS13; const struct s2n_ecc_preferences *server_ecc_preferences = NULL; EXPECT_SUCCESS(s2n_connection_get_ecc_preferences(server_conn, &server_ecc_preferences)); EXPECT_NOT_NULL(server_ecc_preferences); struct s2n_stuffer client_hello_key_share; struct s2n_stuffer server_hello_key_share; EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&client_hello_key_share, 1024)); EXPECT_SUCCESS(s2n_stuffer_growable_alloc(&server_hello_key_share, 1024)); /* Client sends ClientHello key_share */ EXPECT_SUCCESS(s2n_extensions_client_key_share_send(client_conn, &client_hello_key_share)); S2N_STUFFER_READ_EXPECT_EQUAL(&client_hello_key_share, TLS_EXTENSION_KEY_SHARE, uint16); S2N_STUFFER_READ_EXPECT_EQUAL(&client_hello_key_share, s2n_extensions_client_key_share_size(server_conn) - (S2N_SIZE_OF_EXTENSION_TYPE + S2N_SIZE_OF_EXTENSION_DATA_SIZE), uint16); EXPECT_SUCCESS(s2n_extensions_client_key_share_recv(server_conn, &client_hello_key_share)); /* Server configures the "negotiated_curve" */ server_conn->secure.server_ecc_evp_params.negotiated_curve = server_ecc_preferences->ecc_curves[0]; /* Server sends ServerHello key_share */ EXPECT_SUCCESS(s2n_extensions_server_key_share_send(server_conn, &server_hello_key_share)); S2N_STUFFER_READ_EXPECT_EQUAL(&server_hello_key_share, TLS_EXTENSION_KEY_SHARE, uint16); S2N_STUFFER_READ_EXPECT_EQUAL(&server_hello_key_share, s2n_extensions_server_key_share_send_size(server_conn) - (S2N_SIZE_OF_EXTENSION_TYPE + S2N_SIZE_OF_EXTENSION_DATA_SIZE), uint16); EXPECT_SUCCESS(s2n_extensions_server_key_share_recv(client_conn, &server_hello_key_share)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_hello_key_share), 0); EXPECT_EQUAL(server_conn->secure.server_ecc_evp_params.negotiated_curve, client_conn->secure.server_ecc_evp_params.negotiated_curve); DEFER_CLEANUP(struct s2n_blob server_shared_secret = { 0 }, s2n_free); DEFER_CLEANUP(struct s2n_blob client_shared_secret = { 0 }, s2n_free); client_conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; server_conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; /* test that ecdhe shared secret generation matches */ EXPECT_SUCCESS(s2n_tls13_compute_shared_secret(server_conn, &server_shared_secret)); EXPECT_SUCCESS(s2n_tls13_compute_shared_secret(client_conn, &client_shared_secret)); S2N_BLOB_EXPECT_EQUAL(server_shared_secret, client_shared_secret); /* test handle handshake secrets */ EXPECT_SUCCESS(s2n_tls13_handle_handshake_secrets(server_conn)); EXPECT_SUCCESS(s2n_tls13_handle_handshake_secrets(client_conn)); s2n_tls13_connection_keys(server_secrets, server_conn); s2n_tls13_connection_keys(client_secrets, client_conn); /* verify that derive and extract secrets match */ S2N_BLOB_EXPECT_EQUAL(server_secrets.derive_secret, client_secrets.derive_secret); S2N_BLOB_EXPECT_EQUAL(server_secrets.extract_secret, client_secrets.extract_secret); /* verify that client and server finished secrets match */ EXPECT_BYTEARRAY_EQUAL(server_conn->handshake.server_finished, client_conn->handshake.server_finished, server_secrets.size); EXPECT_BYTEARRAY_EQUAL(server_conn->handshake.client_finished, client_conn->handshake.client_finished, client_secrets.size); /* server writes message to client in plaintext */ S2N_BLOB_FROM_HEX(deadbeef_from_server, "DEADBEEF"); EXPECT_SUCCESS(s2n_record_write(server_conn, TLS_APPLICATION_DATA, &deadbeef_from_server)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->out), 9); EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->out)); /* server writes message to client with encryption */ server_conn->server = &server_conn->secure; EXPECT_SUCCESS(s2n_record_write(server_conn, TLS_APPLICATION_DATA, &deadbeef_from_server)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->out), 26); EXPECT_SUCCESS(s2n_stuffer_copy(&server_conn->out, &client_conn->header_in, 5)); EXPECT_SUCCESS(s2n_stuffer_copy(&server_conn->out, &client_conn->in, s2n_stuffer_data_available(&server_conn->out))); client_conn->server = &client_conn->secure; EXPECT_SUCCESS(s2n_record_parse(client_conn)); EXPECT_EQUAL(5, s2n_stuffer_data_available(&client_conn->in)); S2N_STUFFER_READ_EXPECT_EQUAL(&client_conn->in, 0xDEADBEEF, uint32); S2N_STUFFER_READ_EXPECT_EQUAL(&client_conn->in, TLS_APPLICATION_DATA, uint8); S2N_BLOB_FROM_HEX(cafefood_from_client, "CAFED00D"); EXPECT_SUCCESS(s2n_record_write(client_conn, TLS_APPLICATION_DATA, &cafefood_from_client)); /* unencrypted length */ EXPECT_EQUAL(s2n_stuffer_data_available(&client_conn->out), 9); EXPECT_SUCCESS(s2n_stuffer_wipe(&client_conn->out)); client_conn->client = &client_conn->secure; /* let client write a message to server */ EXPECT_SUCCESS(s2n_record_write(client_conn, TLS_APPLICATION_DATA, &cafefood_from_client)); EXPECT_EQUAL(s2n_stuffer_data_available(&client_conn->out), 26); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->header_in, 5)); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->in, s2n_stuffer_data_available(&client_conn->out))); /* if aead payload is parsed as plaintext, it would be of length 21 */ EXPECT_SUCCESS(s2n_record_parse(server_conn)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->in), 21); EXPECT_SUCCESS(s2n_stuffer_reread(&client_conn->out)); EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->header_in)); EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->in)); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->header_in, 5)); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->in, s2n_stuffer_data_available(&client_conn->out))); /* verify that server decrypts client's msg */ server_conn->client = &server_conn->secure; EXPECT_SUCCESS(s2n_record_parse(server_conn)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->in), 5); S2N_STUFFER_READ_EXPECT_EQUAL(&server_conn->in, 0xCAFED00D, uint32); S2N_STUFFER_READ_EXPECT_EQUAL(&server_conn->in, TLS_APPLICATION_DATA, uint8); /* populating server finished hash is now a requirement for s2n_tls13_handle_application_secrets */ EXPECT_SUCCESS(s2n_tls13_conn_copy_server_finished_hash(server_conn)); EXPECT_SUCCESS(s2n_tls13_conn_copy_server_finished_hash(client_conn)); EXPECT_SUCCESS(s2n_tls13_handle_application_secrets(server_conn)); EXPECT_SUCCESS(s2n_tls13_handle_application_secrets(client_conn)); /* verify that application derive and extract secrets match */ S2N_BLOB_EXPECT_EQUAL(server_secrets.derive_secret, client_secrets.derive_secret); S2N_BLOB_EXPECT_EQUAL(server_secrets.extract_secret, client_secrets.extract_secret); /* wipe all the stuffers */ EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->header_in)); EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->in)); EXPECT_SUCCESS(s2n_stuffer_wipe(&server_conn->out)); EXPECT_SUCCESS(s2n_stuffer_wipe(&client_conn->header_in)); EXPECT_SUCCESS(s2n_stuffer_wipe(&client_conn->in)); EXPECT_SUCCESS(s2n_stuffer_wipe(&client_conn->out)); EXPECT_SUCCESS(s2n_record_write(server_conn, TLS_APPLICATION_DATA, &deadbeef_from_server)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->out), 26); /* test that client decrypts deadbeef correctly with application data */ EXPECT_SUCCESS(s2n_stuffer_copy(&server_conn->out, &client_conn->header_in, 5)); EXPECT_SUCCESS(s2n_stuffer_copy(&server_conn->out, &client_conn->in, s2n_stuffer_data_available(&server_conn->out))); EXPECT_SUCCESS(s2n_record_parse(client_conn)); S2N_STUFFER_READ_EXPECT_EQUAL(&client_conn->in, 0xDEADBEEF, uint32); S2N_STUFFER_READ_EXPECT_EQUAL(&client_conn->in, TLS_APPLICATION_DATA, uint8); /* let client write an application message to server */ EXPECT_SUCCESS(s2n_record_write(client_conn, TLS_APPLICATION_DATA, &cafefood_from_client)); EXPECT_EQUAL(s2n_stuffer_data_available(&client_conn->out), 26); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->header_in, 5)); EXPECT_SUCCESS(s2n_stuffer_copy(&client_conn->out, &server_conn->in, s2n_stuffer_data_available(&client_conn->out))); EXPECT_SUCCESS(s2n_record_parse(server_conn)); EXPECT_EQUAL(s2n_stuffer_data_available(&server_conn->in), 5); S2N_STUFFER_READ_EXPECT_EQUAL(&server_conn->in, 0xCAFED00D, uint32); S2N_STUFFER_READ_EXPECT_EQUAL(&server_conn->in, TLS_APPLICATION_DATA, uint8); /* Clean up */ EXPECT_SUCCESS(s2n_stuffer_free(&client_hello_key_share)); EXPECT_SUCCESS(s2n_stuffer_free(&server_hello_key_share)); EXPECT_SUCCESS(s2n_connection_free(client_conn)); EXPECT_SUCCESS(s2n_connection_free(server_conn)); } /* Test: s2n_conn_pre_handshake_hashes_update handlers */ { S2N_BLOB_FROM_HEX(empty_secret, "0000000000000000000000000000000000000000000000000000000000000000"); s2n_mode modes[] = { S2N_CLIENT, S2N_SERVER }; /* we ensure this works in both client and server modes */ for (int m = 0; m < s2n_array_len(modes); m++) { for (int i = 0; i < S2N_MAX_HANDSHAKE_LENGTH; i++) { struct s2n_connection *conn; EXPECT_NOT_NULL(conn = s2n_connection_new(modes[m])); conn->actual_protocol_version = S2N_TLS13; conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; s2n_tls13_connection_keys(client_secrets, conn); S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); conn->handshake.handshake_type = NEGOTIATED | FULL_HANDSHAKE; conn->handshake.message_number = i; EXPECT_SUCCESS(s2n_tls13_conn_copy_server_finished_hash(conn)); /* trigger s2n_conn_pre_handshake_hashes_update */ EXPECT_SUCCESS(s2n_conn_pre_handshake_hashes_update(conn)); if (s2n_conn_get_current_message_type(conn) == CLIENT_FINISHED) { /* check application secrets get updated in client finished */ EXPECT_BYTEARRAY_NOT_EQUAL(empty_secret.data, client_secrets.extract_secret.data, empty_secret.size); } else { S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } EXPECT_SUCCESS(s2n_connection_free(conn)); } } /* test that pre tls1.3 code paths are unaffected */ for (int m = 0; m < s2n_array_len(modes); m++) { for (int i = 0; i < S2N_MAX_HANDSHAKE_LENGTH; i++) { struct s2n_connection *conn; EXPECT_NOT_NULL(conn = s2n_connection_new(modes[m])); conn->actual_protocol_version = S2N_TLS12; conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; s2n_tls13_connection_keys(client_secrets, conn); S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); conn->handshake.handshake_type = NEGOTIATED | FULL_HANDSHAKE; conn->handshake.message_number = i; /* trigger s2n_conn_pre_handshake_hashes_update */ EXPECT_SUCCESS(s2n_conn_pre_handshake_hashes_update(conn)); if (s2n_conn_get_current_message_type(conn) == CLIENT_FINISHED) { /* check application secrets get updated in client finished */ S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } else { S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } EXPECT_SUCCESS(s2n_connection_free(conn)); } } } /* Test: s2n_conn_post_handshake_hashes_update handlers */ { S2N_BLOB_FROM_HEX(empty_secret, "0000000000000000000000000000000000000000000000000000000000000000"); S2N_BLOB_FROM_HEX(ref_seq, "0100000000000000"); S2N_BLOB_FROM_HEX(reset_seq, "0000000000000000"); s2n_mode modes[] = { S2N_CLIENT, S2N_SERVER }; /* we ensure this works in both client and server modes */ for (int m = 0; m < s2n_array_len(modes); m++) { for (int i = 0; i < S2N_MAX_HANDSHAKE_LENGTH; i++) { struct s2n_connection *conn; EXPECT_NOT_NULL(conn = s2n_connection_new(modes[m])); const struct s2n_ecc_preferences *ecc_pref = NULL; EXPECT_SUCCESS(s2n_connection_get_ecc_preferences(conn, &ecc_pref)); EXPECT_NOT_NULL(ecc_pref); conn->actual_protocol_version = S2N_TLS13; conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; s2n_tls13_connection_keys(client_secrets, conn); S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); /* verify that that is the initial secret state */ conn->handshake.handshake_type = NEGOTIATED | FULL_HANDSHAKE; conn->handshake.message_number = i; conn->secure.server_ecc_evp_params.negotiated_curve = ecc_pref->ecc_curves[0]; conn->secure.client_ecc_evp_params[0].negotiated_curve = ecc_pref->ecc_curves[0]; EXPECT_SUCCESS(s2n_ecc_evp_generate_ephemeral_key(&conn->secure.server_ecc_evp_params)); EXPECT_SUCCESS(s2n_ecc_evp_generate_ephemeral_key(&conn->secure.client_ecc_evp_params[0])); struct s2n_blob client_seq = { .data = conn->secure.client_sequence_number,.size = sizeof(conn->secure.client_sequence_number) }; struct s2n_blob server_seq = { .data = conn->secure.server_sequence_number,.size = sizeof(conn->secure.server_sequence_number) }; client_seq.data[0] = 1; server_seq.data[0] = 1; EXPECT_SUCCESS(s2n_conn_post_handshake_hashes_update(conn)); if (s2n_conn_get_current_message_type(conn) == SERVER_HELLO) { /* prove secrets have been updated after ServerHello as they are no longer 0-filled byte arrays */ EXPECT_BYTEARRAY_NOT_EQUAL(empty_secret.data, client_secrets.extract_secret.data, empty_secret.size); } else { S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } if (s2n_conn_get_current_message_type(conn) == SERVER_HELLO || s2n_conn_get_current_message_type(conn) == CLIENT_FINISHED) { S2N_BLOB_EXPECT_EQUAL(client_seq, reset_seq); S2N_BLOB_EXPECT_EQUAL(server_seq, reset_seq); } else { S2N_BLOB_EXPECT_EQUAL(client_seq, ref_seq); S2N_BLOB_EXPECT_EQUAL(server_seq, ref_seq); } EXPECT_SUCCESS(s2n_connection_free(conn)); } } /* Test pre 1.3 code paths are unaffected */ for (int m = 0; m < s2n_array_len(modes); m++) { for (int i = 0; i < S2N_MAX_HANDSHAKE_LENGTH; i++) { struct s2n_connection *conn; EXPECT_NOT_NULL(conn = s2n_connection_new(modes[m])); const struct s2n_ecc_preferences *ecc_pref = NULL; EXPECT_SUCCESS(s2n_connection_get_ecc_preferences(conn, &ecc_pref)); EXPECT_NOT_NULL(ecc_pref); conn->actual_protocol_version = S2N_TLS12; conn->secure.cipher_suite = &s2n_tls13_aes_128_gcm_sha256; s2n_tls13_connection_keys(client_secrets, conn); S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); /* verify that that is the initial secret state */ conn->handshake.handshake_type = NEGOTIATED | FULL_HANDSHAKE; conn->handshake.message_number = i; conn->secure.server_ecc_evp_params.negotiated_curve = ecc_pref->ecc_curves[0]; conn->secure.client_ecc_evp_params[0].negotiated_curve = ecc_pref->ecc_curves[0]; EXPECT_SUCCESS(s2n_ecc_evp_generate_ephemeral_key(&conn->secure.server_ecc_evp_params)); EXPECT_SUCCESS(s2n_ecc_evp_generate_ephemeral_key(&conn->secure.client_ecc_evp_params[0])); struct s2n_blob client_seq = { .data = conn->secure.client_sequence_number,.size = sizeof(conn->secure.client_sequence_number) }; struct s2n_blob server_seq = { .data = conn->secure.server_sequence_number,.size = sizeof(conn->secure.server_sequence_number) }; client_seq.data[0] = 1; server_seq.data[0] = 1; EXPECT_SUCCESS(s2n_conn_post_handshake_hashes_update(conn)); if (s2n_conn_get_current_message_type(conn) == SERVER_HELLO) { S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } else { S2N_BLOB_EXPECT_EQUAL(empty_secret, client_secrets.extract_secret); } if (s2n_conn_get_current_message_type(conn) == SERVER_HELLO || s2n_conn_get_current_message_type(conn) == CLIENT_FINISHED) { S2N_BLOB_EXPECT_EQUAL(client_seq, ref_seq); S2N_BLOB_EXPECT_EQUAL(server_seq, ref_seq); } else { S2N_BLOB_EXPECT_EQUAL(client_seq, ref_seq); S2N_BLOB_EXPECT_EQUAL(server_seq, ref_seq); } EXPECT_SUCCESS(s2n_connection_free(conn)); } } } /* Test: Handshake self-talks using s2n_handshake_write_io and s2n_handshake_read_io */ { struct s2n_connection *client_conn; struct s2n_connection *server_conn; struct s2n_config *server_config, *client_config; EXPECT_NOT_NULL(server_config = s2n_config_new()); EXPECT_NOT_NULL(client_config = s2n_config_new()); EXPECT_SUCCESS(s2n_config_set_unsafe_for_testing(client_config)); char *cert_chain = NULL; char *private_key = NULL; EXPECT_NOT_NULL(cert_chain = malloc(S2N_MAX_TEST_PEM_SIZE)); EXPECT_NOT_NULL(private_key = malloc(S2N_MAX_TEST_PEM_SIZE)); EXPECT_SUCCESS(s2n_read_test_pem(S2N_ECDSA_P384_PKCS1_CERT_CHAIN, cert_chain, S2N_MAX_TEST_PEM_SIZE)); EXPECT_SUCCESS(s2n_read_test_pem(S2N_ECDSA_P384_PKCS1_KEY, private_key, S2N_MAX_TEST_PEM_SIZE)); struct s2n_cert_chain_and_key *default_cert; EXPECT_NOT_NULL(default_cert = s2n_cert_chain_and_key_new()); EXPECT_SUCCESS(s2n_cert_chain_and_key_load_pem(default_cert, cert_chain, private_key)); EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key_to_store(server_config, default_cert)); EXPECT_NOT_NULL(client_conn = s2n_connection_new(S2N_CLIENT)); EXPECT_NOT_NULL(server_conn = s2n_connection_new(S2N_SERVER)); EXPECT_SUCCESS(s2n_connection_set_config(server_conn, server_config)); EXPECT_SUCCESS(s2n_connection_set_config(client_conn, client_config)); struct s2n_stuffer client_to_server; struct s2n_stuffer server_to_client; 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)); struct s2n_blob server_seq = { .data = server_conn->secure.server_sequence_number,.size = sizeof(server_conn->secure.server_sequence_number) }; S2N_BLOB_FROM_HEX(seq_0, "0000000000000000"); S2N_BLOB_FROM_HEX(seq_1, "0000000000000001"); EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(client_conn, "default_tls13")); EXPECT_SUCCESS(s2n_connection_set_cipher_preferences(server_conn, "default_tls13")); /* Client sends ClientHello */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), CLIENT_HELLO); EXPECT_SUCCESS(s2n_handshake_write_io(client_conn)); EXPECT_EQUAL(client_conn->actual_protocol_version, S2N_TLS13); EXPECT_EQUAL(server_conn->actual_protocol_version, 0); s2n_tls13_connection_keys(server_secrets_0, server_conn); EXPECT_EQUAL(server_secrets_0.size, 0); EXPECT_EQUAL(server_conn->handshake.handshake_type, INITIAL); /* Server reads ClientHello */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), CLIENT_HELLO); EXPECT_SUCCESS(s2n_handshake_read_io(server_conn)); EXPECT_EQUAL(server_conn->actual_protocol_version, S2N_TLS13); /* Server is now on TLS13 */ EXPECT_EQUAL(server_conn->handshake.handshake_type, NEGOTIATED | FULL_HANDSHAKE | MIDDLEBOX_COMPAT); s2n_tls13_connection_keys(server_secrets, server_conn); EXPECT_EQUAL(server_secrets.size, 48); EXPECT_SUCCESS(s2n_conn_set_handshake_type(server_conn)); /* Server sends ServerHello */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), SERVER_HELLO); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); /* Server sends CCS */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), SERVER_CHANGE_CIPHER_SPEC); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); S2N_BLOB_EXPECT_EQUAL(server_seq, seq_0); /* Server sends EncryptedExtensions */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), ENCRYPTED_EXTENSIONS); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); S2N_BLOB_EXPECT_EQUAL(server_seq, seq_1); /* Server sends ServerCert */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), SERVER_CERT); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); /* Server sends CertVerify */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), SERVER_CERT_VERIFY); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); /* Server sends ServerFinished */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), SERVER_FINISHED); EXPECT_SUCCESS(s2n_handshake_write_io(server_conn)); /* Client reads ServerHello */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), SERVER_HELLO); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); /* Client reads CCS * The CCS message does not affect its place in the state machine. */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), ENCRYPTED_EXTENSIONS); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); s2n_tls13_connection_keys(client_secrets, client_conn); EXPECT_EQUAL(client_secrets.size, 48); /* Verify that derive and extract secrets match */ S2N_BLOB_EXPECT_EQUAL(server_secrets.derive_secret, client_secrets.derive_secret); S2N_BLOB_EXPECT_EQUAL(server_secrets.extract_secret, client_secrets.extract_secret); /* Client reads Encrypted extensions */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), ENCRYPTED_EXTENSIONS); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); /* Client reads ServerCert */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), SERVER_CERT); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); /* Client reads CertVerify */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), SERVER_CERT_VERIFY); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); /* Client reads ServerFinished */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), SERVER_FINISHED); EXPECT_SUCCESS(s2n_handshake_read_io(client_conn)); /* Client sends CCS */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), CLIENT_CHANGE_CIPHER_SPEC); EXPECT_SUCCESS(s2n_handshake_write_io(client_conn)); /* Client sends ClientFinished */ EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), CLIENT_FINISHED); EXPECT_SUCCESS(s2n_handshake_write_io(client_conn)); /* Server reads CCS * The CCS message does not affect its place in the state machine. */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), CLIENT_FINISHED); EXPECT_SUCCESS(s2n_handshake_read_io(server_conn)); /* Server reads ClientFinished */ EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), CLIENT_FINISHED); EXPECT_SUCCESS(s2n_handshake_read_io(server_conn)); EXPECT_EQUAL(s2n_conn_get_current_message_type(client_conn), APPLICATION_DATA); EXPECT_EQUAL(s2n_conn_get_current_message_type(server_conn), APPLICATION_DATA); /* Clean up */ EXPECT_SUCCESS(s2n_stuffer_free(&client_to_server)); EXPECT_SUCCESS(s2n_stuffer_free(&server_to_client)); EXPECT_SUCCESS(s2n_connection_free(client_conn)); EXPECT_SUCCESS(s2n_connection_free(server_conn)); EXPECT_SUCCESS(s2n_cert_chain_and_key_free(default_cert)); EXPECT_SUCCESS(s2n_config_free(server_config)); EXPECT_SUCCESS(s2n_config_free(client_config)); free(private_key); free(cert_chain); } END_TEST(); return 0; }