| /* |
| * |
| * Copyright 2016, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include <arpa/inet.h> |
| #include <openssl/err.h> |
| #include <openssl/ssl.h> |
| #include <string.h> |
| #include <sys/socket.h> |
| #include <unistd.h> |
| |
| #include <grpc/grpc.h> |
| #include <grpc/grpc_security.h> |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/string_util.h> |
| #include <grpc/support/sync.h> |
| #include <grpc/support/thd.h> |
| #include "src/core/lib/iomgr/load_file.h" |
| #include "test/core/util/port.h" |
| #include "test/core/util/test_config.h" |
| |
| #define SSL_CERT_PATH "src/core/lib/tsi/test_creds/server1.pem" |
| #define SSL_KEY_PATH "src/core/lib/tsi/test_creds/server1.key" |
| #define SSL_CA_PATH "src/core/lib/tsi/test_creds/ca.pem" |
| |
| // Handshake completed signal to server thread. |
| static gpr_event client_handshake_complete; |
| |
| static int create_socket(int port) { |
| int s; |
| struct sockaddr_in addr; |
| |
| addr.sin_family = AF_INET; |
| addr.sin_port = htons((uint16_t)port); |
| addr.sin_addr.s_addr = htonl(INADDR_ANY); |
| |
| s = socket(AF_INET, SOCK_STREAM, 0); |
| if (s < 0) { |
| perror("Unable to create socket"); |
| return -1; |
| } |
| |
| if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) { |
| perror("Unable to connect"); |
| return -1; |
| } |
| |
| return s; |
| } |
| |
| // Simple gRPC server. This listens until client_handshake_complete occurs. |
| static void server_thread(void *arg) { |
| const int port = *(int *)arg; |
| |
| // Load key pair and establish server SSL credentials. |
| grpc_ssl_pem_key_cert_pair pem_key_cert_pair; |
| grpc_slice ca_slice, cert_slice, key_slice; |
| GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file", |
| grpc_load_file(SSL_CA_PATH, 1, &ca_slice))); |
| GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file", |
| grpc_load_file(SSL_CERT_PATH, 1, &cert_slice))); |
| GPR_ASSERT(GRPC_LOG_IF_ERROR("load_file", |
| grpc_load_file(SSL_KEY_PATH, 1, &key_slice))); |
| const char *ca_cert = (const char *)GRPC_SLICE_START_PTR(ca_slice); |
| pem_key_cert_pair.private_key = (const char *)GRPC_SLICE_START_PTR(key_slice); |
| pem_key_cert_pair.cert_chain = (const char *)GRPC_SLICE_START_PTR(cert_slice); |
| grpc_server_credentials *ssl_creds = grpc_ssl_server_credentials_create( |
| ca_cert, &pem_key_cert_pair, 1, 0, NULL); |
| |
| // Start server listening on local port. |
| char *addr; |
| gpr_asprintf(&addr, "127.0.0.1:%d", port); |
| grpc_server *server = grpc_server_create(NULL, NULL); |
| GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr, ssl_creds)); |
| free(addr); |
| |
| grpc_completion_queue *cq = |
| grpc_completion_queue_create(GRPC_CQ_NEXT, GRPC_CQ_DEFAULT_POLLING, NULL); |
| |
| grpc_server_register_completion_queue(server, cq, NULL); |
| grpc_server_start(server); |
| |
| // Wait a bounded number of time until client_handshake_complete is set, |
| // sleeping between polls. |
| int retries = 10; |
| while (!gpr_event_get(&client_handshake_complete) && retries-- > 0) { |
| const gpr_timespec cq_deadline = grpc_timeout_seconds_to_deadline(1); |
| grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL); |
| GPR_ASSERT(ev.type == GRPC_QUEUE_TIMEOUT); |
| } |
| |
| gpr_log(GPR_INFO, "Shutting down server"); |
| grpc_server_shutdown_and_notify(server, cq, NULL); |
| grpc_completion_queue_shutdown(cq); |
| |
| const gpr_timespec cq_deadline = grpc_timeout_seconds_to_deadline(5); |
| grpc_event ev = grpc_completion_queue_next(cq, cq_deadline, NULL); |
| GPR_ASSERT(ev.type == GRPC_OP_COMPLETE); |
| |
| grpc_server_destroy(server); |
| grpc_completion_queue_destroy(cq); |
| grpc_server_credentials_release(ssl_creds); |
| grpc_slice_unref(cert_slice); |
| grpc_slice_unref(key_slice); |
| grpc_slice_unref(ca_slice); |
| } |
| |
| // This test launches a gRPC server on a separate thread and then establishes a |
| // TLS handshake via a minimal TLS client. The TLS client has configurable (via |
| // alpn_list) ALPN settings and can probe at the supported ALPN preferences |
| // using this (via alpn_expected). |
| static bool server_ssl_test(const char *alpn_list[], unsigned int alpn_list_len, |
| const char *alpn_expected) { |
| bool success = true; |
| |
| grpc_init(); |
| int port = grpc_pick_unused_port_or_die(); |
| gpr_event_init(&client_handshake_complete); |
| |
| // Launch the gRPC server thread. |
| gpr_thd_options thdopt = gpr_thd_options_default(); |
| gpr_thd_id thdid; |
| gpr_thd_options_set_joinable(&thdopt); |
| GPR_ASSERT(gpr_thd_new(&thdid, server_thread, &port, &thdopt)); |
| |
| SSL_load_error_strings(); |
| OpenSSL_add_ssl_algorithms(); |
| |
| const SSL_METHOD *method = TLSv1_2_client_method(); |
| SSL_CTX *ctx = SSL_CTX_new(method); |
| if (!ctx) { |
| perror("Unable to create SSL context"); |
| ERR_print_errors_fp(stderr); |
| abort(); |
| } |
| |
| // Load key pair. |
| if (SSL_CTX_use_certificate_file(ctx, SSL_CERT_PATH, SSL_FILETYPE_PEM) < 0) { |
| ERR_print_errors_fp(stderr); |
| abort(); |
| } |
| if (SSL_CTX_use_PrivateKey_file(ctx, SSL_KEY_PATH, SSL_FILETYPE_PEM) < 0) { |
| ERR_print_errors_fp(stderr); |
| abort(); |
| } |
| |
| // Set the cipher list to match the one expressed in |
| // src/core/lib/tsi/ssl_transport_security.c. |
| const char *cipher_list = |
| "ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-" |
| "SHA384:ECDHE-RSA-AES256-GCM-SHA384"; |
| if (!SSL_CTX_set_cipher_list(ctx, cipher_list)) { |
| ERR_print_errors_fp(stderr); |
| gpr_log(GPR_ERROR, "Couldn't set server cipher list."); |
| abort(); |
| } |
| |
| // Configure ALPN list the client will send to the server. This must match the |
| // wire format, see documentation for SSL_CTX_set_alpn_protos. |
| unsigned int alpn_protos_len = alpn_list_len; |
| for (unsigned int i = 0; i < alpn_list_len; ++i) { |
| alpn_protos_len += (unsigned int)strlen(alpn_list[i]); |
| } |
| unsigned char *alpn_protos = gpr_malloc(alpn_protos_len); |
| unsigned char *p = alpn_protos; |
| for (unsigned int i = 0; i < alpn_list_len; ++i) { |
| const uint8_t len = (uint8_t)strlen(alpn_list[i]); |
| *p++ = len; |
| memcpy(p, alpn_list[i], len); |
| p += len; |
| } |
| GPR_ASSERT(SSL_CTX_set_alpn_protos(ctx, alpn_protos, alpn_protos_len) == 0); |
| |
| // Try and connect to server. We allow a bounded number of retries as we might |
| // be racing with the server setup on its separate thread. |
| int retries = 10; |
| int sock = -1; |
| while (sock == -1 && retries-- > 0) { |
| sock = create_socket(port); |
| if (sock < 0) { |
| sleep(1); |
| } |
| } |
| GPR_ASSERT(sock > 0); |
| gpr_log(GPR_INFO, "Connected to server on port %d", port); |
| |
| // Establish a SSL* and connect at SSL layer. |
| SSL *ssl = SSL_new(ctx); |
| GPR_ASSERT(ssl); |
| SSL_set_fd(ssl, sock); |
| if (SSL_connect(ssl) <= 0) { |
| ERR_print_errors_fp(stderr); |
| gpr_log(GPR_ERROR, "Handshake failed."); |
| success = false; |
| } else { |
| gpr_log(GPR_INFO, "Handshake successful."); |
| // Validate ALPN preferred by server matches alpn_expected. |
| const unsigned char *alpn_selected; |
| unsigned int alpn_selected_len; |
| SSL_get0_alpn_selected(ssl, &alpn_selected, &alpn_selected_len); |
| if (strlen(alpn_expected) != alpn_selected_len || |
| strncmp((const char *)alpn_selected, alpn_expected, |
| alpn_selected_len) != 0) { |
| gpr_log(GPR_ERROR, "Unexpected ALPN protocol preference"); |
| success = false; |
| } |
| } |
| gpr_event_set(&client_handshake_complete, &client_handshake_complete); |
| |
| SSL_free(ssl); |
| gpr_free(alpn_protos); |
| SSL_CTX_free(ctx); |
| EVP_cleanup(); |
| close(sock); |
| |
| gpr_thd_join(thdid); |
| |
| grpc_shutdown(); |
| |
| return success; |
| } |
| |
| int main(int argc, char *argv[]) { |
| // Handshake succeeeds when the client supplies the standard ALPN list. |
| const char *full_alpn_list[] = {"grpc-exp", "h2"}; |
| GPR_ASSERT(server_ssl_test(full_alpn_list, 2, "grpc-exp")); |
| // Handshake succeeeds when the client supplies only h2 as the ALPN list. This |
| // covers legacy gRPC clients which don't support grpc-exp. |
| const char *h2_only_alpn_list[] = {"h2"}; |
| GPR_ASSERT(server_ssl_test(h2_only_alpn_list, 1, "h2")); |
| // Handshake succeeds when the client supplies superfluous ALPN entries and |
| // also when h2 precedes gprc-exp. |
| const char *extra_alpn_list[] = {"foo", "h2", "bar", "grpc-exp"}; |
| GPR_ASSERT(server_ssl_test(extra_alpn_list, 4, "h2")); |
| // Handshake fails when the client uses a fake protocol as its only ALPN |
| // preference. This validates the server is correctly validating ALPN |
| // and sanity checks the server_ssl_test. |
| const char *fake_alpn_list[] = {"foo"}; |
| GPR_ASSERT(!server_ssl_test(fake_alpn_list, 1, "foo")); |
| return 0; |
| } |