int mock_client(int writefd, int readfd, const char **protocols, int count, const char *expected) { char buffer[0xffff]; struct s2n_connection *conn; struct s2n_config *config; s2n_blocked_status blocked; int result = 0; /* Give the server a chance to listen */ sleep(1); conn = s2n_connection_new(S2N_CLIENT); config = s2n_config_new(); s2n_config_set_protocol_preferences(config, protocols, count); s2n_connection_set_config(conn, config); s2n_connection_set_read_fd(conn, readfd); s2n_connection_set_write_fd(conn, writefd); result = s2n_negotiate(conn, &blocked); if (result < 0) { result = 1; } const char *got = s2n_get_application_protocol(conn); if ((got != NULL && expected == NULL) || (got == NULL && expected != NULL) || (got != NULL && expected != NULL && strcmp(expected, got) != 0)) { result = 2; } for (int i = 1; i < 0xffff; i += 100) { for (int j = 0; j < i; j++) { buffer[j] = 33; } s2n_send(conn, buffer, i, &blocked); } s2n_connection_free(conn); /* Give the server a chance to a void a sigpipe */ sleep(1); _exit(result); }
int main(int argc, char **argv) { if(argc != 2) { fprintf(stderr,"usage: %s hostname\n", argv[0]); return 1; } signal(SIGINT, sigint_handler); printf("Looking up addresses for %s ...\n", argv[1]); struct addrinfo hints; memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_UNSPEC; // AF_INET or AF_INET6 to force version hints.ai_socktype = SOCK_STREAM; struct addrinfo *dnsres; int status_1 = getaddrinfo(argv[1], PORT, &hints, &dnsres); if(status_1 != 0) { fprintf(stderr, "dns lookup failed: %s\n", gai_strerror(status_1)); return 2; } print_addrinfo(dnsres); printf("Connecting to %s ...\n", "the server"); int sockfd = socket(dnsres->ai_family, dnsres->ai_socktype, dnsres->ai_protocol); if(connect(sockfd, dnsres->ai_addr, dnsres->ai_addrlen) != 0) { perror("connect"); return 3; } printf("Connected.\n"); freeaddrinfo(dnsres); // frees the memory that was dynamically allocated for the linked lists by getaddrinfo s2n_init(); struct s2n_config *config = s2n_config_new(); s2n_status_request_type type = S2N_STATUS_REQUEST_NONE; s2n_config_set_status_request_type(config, type); struct s2n_connection *conn = s2n_connection_new(S2N_CLIENT); s2n_connection_set_config(conn, config); s2n_connection_set_fd(conn, sockfd); s2n_blocked_status blocked; do { if (s2n_negotiate(conn, &blocked) < 0) { fprintf(stderr, "Failed to negotiate: '%s' %d\n", s2n_strerror(s2n_errno, "EN"), s2n_connection_get_alert(conn)); exit(1); } } while (blocked); int client_hello_version; int client_protocol_version; int server_protocol_version; int actual_protocol_version; if ((client_hello_version = s2n_connection_get_client_hello_version(conn)) < 0) { fprintf(stderr, "Could not get client hello version\n"); exit(1); } if ((client_protocol_version = s2n_connection_get_client_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get client protocol version\n"); exit(1); } if ((server_protocol_version = s2n_connection_get_server_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get server protocol version\n"); exit(1); } if ((actual_protocol_version = s2n_connection_get_actual_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get actual protocol version\n"); exit(1); } printf("Client hello version: %d\n", client_hello_version); printf("Client protocol version: %d\n", client_protocol_version); printf("Server protocol version: %d\n", server_protocol_version); printf("Actual protocol version: %d\n", actual_protocol_version); if (s2n_get_server_name(conn)) { printf("Server name: %s\n", s2n_get_server_name(conn)); } if (s2n_get_application_protocol(conn)) { printf("Application protocol: %s\n", s2n_get_application_protocol(conn)); } uint32_t length; const uint8_t *status = s2n_connection_get_ocsp_response(conn, &length); if (status && length > 0) { fprintf(stderr, "OCSP response received, length %d\n", length); } printf("Cipher negotiated: %s\n", s2n_connection_get_cipher(conn)); char buf[BUFFERSIZE + 1]; int bytes_read, bytes_written; // Make sure stdin is a terminal. if (!isatty(STDIN_FILENO)) { fprintf(stderr, "Not a terminal.\n"); exit(EXIT_FAILURE); } // Save the terminal attributes so we can restore them later. tcgetattr(STDIN_FILENO, &saved_attributes); atexit(reset_input_mode); // Set the funny terminal modes. struct termios tattr; tcgetattr(STDIN_FILENO, &tattr); tattr.c_lflag &= ~(ICANON | ECHO); // Clear ICANON and ECHO. tattr.c_cc[VMIN] = 1; tattr.c_cc[VTIME] = 0; tcsetattr(STDIN_FILENO, TCSAFLUSH, &tattr); fd_set master, readfds; FD_ZERO(&master); FD_SET(STDIN_FILENO, &master); FD_SET(sockfd, &master); for(;;) { readfds = master; select(sockfd + 1, &readfds, NULL, NULL, NULL); if(FD_ISSET(STDIN_FILENO, &readfds)) { bytes_read = read(STDIN_FILENO, buf, BUFFERSIZE); if(bytes_read < 1) break; char *buf_ptr = buf; int bytes_available = bytes_read; do { bytes_written = s2n_send(conn, buf_ptr, bytes_available, &blocked); if(bytes_written < 0) break; bytes_available -= bytes_written; buf_ptr += bytes_written; } while(bytes_available || blocked); } if(FD_ISSET(sockfd, &readfds)) { do { bytes_read = s2n_recv(conn, buf, BUFFERSIZE, &blocked); if(bytes_read < 1) break; write(STDOUT_FILENO, buf, bytes_read); } while(blocked); } //if(nbytes != mbytes) printf("nbytes [%d] != mbytes [%d] \n", nbytes, mbytes); } close(sockfd); s2n_connection_free(conn); s2n_config_free(config); s2n_cleanup(); printf("\nBYE!\n"); return 0; }
int main(int argc, char **argv) { char buffer[0xffff]; struct s2n_connection *conn; struct s2n_config *config; s2n_blocked_status blocked; int status; pid_t pid; int server_to_client[2]; int client_to_server[2]; const char *protocols[] = { "http/1.1", "spdy/3.1" }; const char *mismatch_protocols[] = { "spdy/2" }; BEGIN_TEST(); EXPECT_SUCCESS(setenv("S2N_ENABLE_CLIENT_MODE", "1", 0)); EXPECT_NOT_NULL(config = s2n_config_new()); EXPECT_SUCCESS(s2n_config_set_protocol_preferences(config, protocols, 2)); EXPECT_SUCCESS(s2n_config_add_cert_chain_and_key(config, certificate, private_key)); EXPECT_SUCCESS(s2n_config_add_dhparams(config, dhparams)); /** Test no client ALPN request */ /* Create a pipe */ EXPECT_SUCCESS(pipe(server_to_client)); EXPECT_SUCCESS(pipe(client_to_server)); /* Create a child process */ pid = fork(); if (pid == 0) { /* This is the child process, close the read end of the pipe */ EXPECT_SUCCESS(close(client_to_server[0])); EXPECT_SUCCESS(close(server_to_client[1])); /* Send the client hello with no ALPN extensions, and validate we didn't * negotiate an application protocol */ mock_client(client_to_server[1], server_to_client[0], NULL, 0, NULL); } /* This is the parent */ EXPECT_SUCCESS(close(client_to_server[1])); EXPECT_SUCCESS(close(server_to_client[0])); EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER)); EXPECT_SUCCESS(s2n_connection_set_config(conn, config)); /* Set up the connection to read from the fd */ EXPECT_SUCCESS(s2n_connection_set_read_fd(conn, client_to_server[0])); EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, server_to_client[1])); /* Negotiate the handshake. */ EXPECT_SUCCESS(s2n_negotiate(conn, &blocked)); /* Expect NULL negotiated protocol */ EXPECT_EQUAL(s2n_get_application_protocol(conn), NULL); for (int i = 1; i < 0xffff; i += 100) { char * ptr = buffer; int bytes_read = 0; int size = i; do { EXPECT_SUCCESS(bytes_read = s2n_recv(conn, ptr, size, &blocked)); size -= bytes_read; ptr += bytes_read; } while(size); for (int j = 0; j < i; j++) { EXPECT_EQUAL(buffer[j], 33); } } EXPECT_SUCCESS(s2n_shutdown(conn, &blocked)); EXPECT_SUCCESS(s2n_connection_free(conn)); /* Clean up */ EXPECT_EQUAL(waitpid(-1, &status, 0), pid); EXPECT_EQUAL(status, 0); /* Test a matching ALPN request */ /* Create a pipe */ EXPECT_SUCCESS(pipe(server_to_client)); EXPECT_SUCCESS(pipe(client_to_server)); /* Create a child process */ pid = fork(); if (pid == 0) { /* This is the child process, close the read end of the pipe */ EXPECT_SUCCESS(close(client_to_server[0])); EXPECT_SUCCESS(close(server_to_client[1])); /* Clients ALPN preferences match our preferences, so we pick the * most preffered server one */ mock_client(client_to_server[1], server_to_client[0], protocols, 2, protocols[0]); } /* This is the parent */ EXPECT_SUCCESS(close(client_to_server[1])); EXPECT_SUCCESS(close(server_to_client[0])); EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER)); EXPECT_SUCCESS(s2n_connection_set_config(conn, config)); /* Set up the connection to read from the fd */ EXPECT_SUCCESS(s2n_connection_set_read_fd(conn, client_to_server[0])); EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, server_to_client[1])); /* Negotiate the handshake. */ EXPECT_SUCCESS(s2n_negotiate(conn, &blocked)); /* Expect our most prefered negotiated protocol */ EXPECT_STRING_EQUAL(s2n_get_application_protocol(conn), protocols[0]); for (int i = 1; i < 0xffff; i += 100) { char * ptr = buffer; int bytes_read = 0; int size = i; do { EXPECT_SUCCESS(bytes_read = s2n_recv(conn, ptr, size, &blocked)); size -= bytes_read; ptr += bytes_read; } while(size); for (int j = 0; j < i; j++) { EXPECT_EQUAL(buffer[j], 33); } } EXPECT_SUCCESS(s2n_shutdown(conn, &blocked)); EXPECT_SUCCESS(s2n_connection_free(conn)); /* Clean up */ EXPECT_EQUAL(waitpid(-1, &status, 0), pid); EXPECT_EQUAL(status, 0); /* Test a lower prefered matching ALPN request */ /* Create a pipe */ EXPECT_SUCCESS(pipe(server_to_client)); EXPECT_SUCCESS(pipe(client_to_server)); /* Create a child process */ pid = fork(); if (pid == 0) { /* This is the child process, close the read end of the pipe */ EXPECT_SUCCESS(close(client_to_server[0])); EXPECT_SUCCESS(close(server_to_client[1])); /* Client only advertises our second choice, so we should negotiate it */ mock_client(client_to_server[1], server_to_client[0], &protocols[1], 1, protocols[1]); } /* This is the parent */ EXPECT_SUCCESS(close(client_to_server[1])); EXPECT_SUCCESS(close(server_to_client[0])); EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER)); EXPECT_SUCCESS(s2n_connection_set_config(conn, config)); /* Set up the connection to read from the fd */ EXPECT_SUCCESS(s2n_connection_set_read_fd(conn, client_to_server[0])); EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, server_to_client[1])); /* Negotiate the handshake. */ EXPECT_SUCCESS(s2n_negotiate(conn, &blocked)); for (int i = 1; i < 0xffff; i += 100) { char * ptr = buffer; int bytes_read = 0; int size = i; do { EXPECT_SUCCESS(bytes_read = s2n_recv(conn, ptr, size, &blocked)); size -= bytes_read; ptr += bytes_read; } while(size); for (int j = 0; j < i; j++) { EXPECT_EQUAL(buffer[j], 33); } } /* Expect our least prefered negotiated protocol */ EXPECT_STRING_EQUAL(s2n_get_application_protocol(conn), protocols[1]); EXPECT_SUCCESS(s2n_shutdown(conn, &blocked)); EXPECT_SUCCESS(s2n_connection_free(conn)); /* Clean up */ EXPECT_EQUAL(waitpid(-1, &status, 0), pid); EXPECT_EQUAL(status, 0); /* Test a non-matching ALPN request */ /* Create a pipe */ EXPECT_SUCCESS(pipe(server_to_client)); EXPECT_SUCCESS(pipe(client_to_server)); /* Create a child process */ pid = fork(); if (pid == 0) { /* This is the child process, close the read end of the pipe */ EXPECT_SUCCESS(close(client_to_server[0])); EXPECT_SUCCESS(close(server_to_client[1])); /* Client doesn't support any of our protocols, so we shouldn't complete * the handshake */ mock_client(client_to_server[1], server_to_client[0], mismatch_protocols, 1, NULL); } /* This is the parent */ EXPECT_SUCCESS(close(client_to_server[1])); EXPECT_SUCCESS(close(server_to_client[0])); EXPECT_NOT_NULL(conn = s2n_connection_new(S2N_SERVER)); EXPECT_SUCCESS(s2n_connection_set_config(conn, config)); /* Set up the connection to read from the fd */ EXPECT_SUCCESS(s2n_connection_set_read_fd(conn, client_to_server[0])); EXPECT_SUCCESS(s2n_connection_set_write_fd(conn, server_to_client[1])); /* s2n_negotiate will fail, which ordinarily would delay with a sleep. * Remove the sleep and fake the delay with a mock time routine */ EXPECT_SUCCESS(s2n_connection_set_blinding(conn, S2N_SELF_SERVICE_BLINDING)); EXPECT_SUCCESS(s2n_config_set_nanoseconds_since_epoch_callback(config, mock_nanoseconds_since_epoch, NULL)); /* Negotiate the handshake. */ EXPECT_FAILURE(s2n_negotiate(conn, &blocked)); /* Expect NULL negotiated protocol */ EXPECT_EQUAL(s2n_get_application_protocol(conn), NULL); EXPECT_SUCCESS(s2n_shutdown(conn, &blocked)); EXPECT_SUCCESS(s2n_connection_free(conn)); /* Close the pipes */ EXPECT_SUCCESS(close(client_to_server[0])); EXPECT_SUCCESS(close(server_to_client[1])); /* Clean up */ EXPECT_EQUAL(waitpid(-1, &status, 0), pid); EXPECT_NOT_EQUAL(status, 0); EXPECT_SUCCESS(s2n_config_free(config)); END_TEST(); return 0; }
int negotiate(struct s2n_connection *conn) { s2n_blocked_status blocked; do { if (s2n_negotiate(conn, &blocked) < 0) { fprintf(stderr, "Failed to negotiate: '%s'. %s\n", s2n_strerror(s2n_errno, "EN"), s2n_strerror_debug(s2n_errno, "EN")); fprintf(stderr, "Alert: %d\n", s2n_connection_get_alert(conn)); return -1; } } while (blocked); /* Now that we've negotiated, print some parameters */ int client_hello_version; int client_protocol_version; int server_protocol_version; int actual_protocol_version; if ((client_hello_version = s2n_connection_get_client_hello_version(conn)) < 0) { fprintf(stderr, "Could not get client hello version\n"); return -1; } if ((client_protocol_version = s2n_connection_get_client_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get client protocol version\n"); return -1; } if ((server_protocol_version = s2n_connection_get_server_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get server protocol version\n"); return -1; } if ((actual_protocol_version = s2n_connection_get_actual_protocol_version(conn)) < 0) { fprintf(stderr, "Could not get actual protocol version\n"); return -1; } printf("CONNECTED:\n"); printf("Client hello version: %d\n", client_hello_version); printf("Client protocol version: %d\n", client_protocol_version); printf("Server protocol version: %d\n", server_protocol_version); printf("Actual protocol version: %d\n", actual_protocol_version); if (s2n_get_server_name(conn)) { printf("Server name: %s\n", s2n_get_server_name(conn)); } if (s2n_get_application_protocol(conn)) { printf("Application protocol: %s\n", s2n_get_application_protocol(conn)); } printf("Curve: %s\n", s2n_connection_get_curve(conn)); uint32_t length; const uint8_t *status = s2n_connection_get_ocsp_response(conn, &length); if (status && length > 0) { fprintf(stderr, "OCSP response received, length %u\n", length); } printf("Cipher negotiated: %s\n", s2n_connection_get_cipher(conn)); if (s2n_connection_is_session_resumed(conn)) { printf("Resumed session\n"); } return 0; }