| /* Copyright (c) 2014, Google Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION |
| * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN |
| * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ |
| |
| #include <arpa/inet.h> |
| #include <netinet/in.h> |
| #include <signal.h> |
| #include <sys/socket.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <openssl/bio.h> |
| #include <openssl/bytestring.h> |
| #include <openssl/ssl.h> |
| |
| #include "async_bio.h" |
| |
| static int usage(const char *program) { |
| fprintf(stderr, "Usage: %s (client|server) (normal|resume) [flags...]\n", |
| program); |
| return 1; |
| } |
| |
| static const char *expected_server_name = NULL; |
| static int early_callback_called = 0; |
| |
| static int select_certificate_callback(const struct ssl_early_callback_ctx *ctx) { |
| early_callback_called = 1; |
| |
| if (!expected_server_name) { |
| return 1; |
| } |
| |
| const uint8_t *extension_data; |
| size_t extension_len; |
| CBS extension, server_name_list, host_name; |
| uint8_t name_type; |
| |
| if (!SSL_early_callback_ctx_extension_get(ctx, TLSEXT_TYPE_server_name, |
| &extension_data, |
| &extension_len)) { |
| fprintf(stderr, "Could not find server_name extension.\n"); |
| return -1; |
| } |
| |
| CBS_init(&extension, extension_data, extension_len); |
| if (!CBS_get_u16_length_prefixed(&extension, &server_name_list) || |
| CBS_len(&extension) != 0 || |
| !CBS_get_u8(&server_name_list, &name_type) || |
| name_type != TLSEXT_NAMETYPE_host_name || |
| !CBS_get_u16_length_prefixed(&server_name_list, &host_name) || |
| CBS_len(&server_name_list) != 0) { |
| fprintf(stderr, "Could not decode server_name extension.\n"); |
| return -1; |
| } |
| |
| if (!CBS_mem_equal(&host_name, (const uint8_t*)expected_server_name, |
| strlen(expected_server_name))) { |
| fprintf(stderr, "Server name mismatch.\n"); |
| } |
| |
| return 1; |
| } |
| |
| static int skip_verify(int preverify_ok, X509_STORE_CTX *store_ctx) { |
| return 1; |
| } |
| |
| static const char *advertise_npn = NULL; |
| |
| static int next_protos_advertised_callback(SSL *ssl, |
| const uint8_t **out, |
| unsigned int *out_len, |
| void *arg) { |
| if (!advertise_npn) |
| return SSL_TLSEXT_ERR_NOACK; |
| |
| // TODO(davidben): Support passing byte strings with NULs to the |
| // test shim. |
| *out = (const uint8_t*)advertise_npn; |
| *out_len = strlen(advertise_npn); |
| return SSL_TLSEXT_ERR_OK; |
| } |
| |
| static const char *select_next_proto = NULL; |
| |
| static int next_proto_select_callback(SSL* ssl, |
| uint8_t** out, |
| uint8_t* outlen, |
| const uint8_t* in, |
| unsigned inlen, |
| void* arg) { |
| if (!select_next_proto) |
| return SSL_TLSEXT_ERR_NOACK; |
| |
| *out = (uint8_t*)select_next_proto; |
| *outlen = strlen(select_next_proto); |
| return SSL_TLSEXT_ERR_OK; |
| } |
| |
| static SSL_CTX *setup_ctx(int is_server) { |
| if (!SSL_library_init()) { |
| return NULL; |
| } |
| |
| SSL_CTX *ssl_ctx = NULL; |
| DH *dh = NULL; |
| |
| ssl_ctx = SSL_CTX_new( |
| is_server ? SSLv23_server_method() : SSLv23_client_method()); |
| if (ssl_ctx == NULL) { |
| goto err; |
| } |
| |
| if (!SSL_CTX_set_ecdh_auto(ssl_ctx, 1)) { |
| goto err; |
| } |
| |
| if (!SSL_CTX_set_cipher_list(ssl_ctx, "ALL")) { |
| goto err; |
| } |
| |
| dh = DH_get_2048_256(NULL); |
| if (!SSL_CTX_set_tmp_dh(ssl_ctx, dh)) { |
| goto err; |
| } |
| |
| SSL_CTX_set_session_cache_mode(ssl_ctx, SSL_SESS_CACHE_BOTH); |
| |
| ssl_ctx->select_certificate_cb = select_certificate_callback; |
| |
| SSL_CTX_set_next_protos_advertised_cb( |
| ssl_ctx, next_protos_advertised_callback, NULL); |
| SSL_CTX_set_next_proto_select_cb( |
| ssl_ctx, next_proto_select_callback, NULL); |
| |
| DH_free(dh); |
| return ssl_ctx; |
| |
| err: |
| if (dh != NULL) { |
| DH_free(dh); |
| } |
| if (ssl_ctx != NULL) { |
| SSL_CTX_free(ssl_ctx); |
| } |
| return NULL; |
| } |
| |
| static int retry_async(SSL *ssl, int ret, BIO *bio) { |
| // No error; don't retry. |
| if (ret >= 0) { |
| return 0; |
| } |
| // See if we needed to read or write more. If so, allow one byte through on |
| // the appropriate end to maximally stress the state machine. |
| int err = SSL_get_error(ssl, ret); |
| if (err == SSL_ERROR_WANT_READ) { |
| async_bio_allow_read(bio, 1); |
| return 1; |
| } else if (err == SSL_ERROR_WANT_WRITE) { |
| async_bio_allow_write(bio, 1); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int do_exchange(SSL_SESSION **out_session, |
| SSL_CTX *ssl_ctx, |
| int argc, |
| char **argv, |
| int is_server, |
| int is_resume, |
| int fd, |
| SSL_SESSION *session) { |
| bool async = false, write_different_record_sizes = false; |
| const char *expected_certificate_types = NULL; |
| const char *expected_next_proto = NULL; |
| expected_server_name = NULL; |
| early_callback_called = 0; |
| advertise_npn = NULL; |
| |
| SSL *ssl = SSL_new(ssl_ctx); |
| if (ssl == NULL) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| |
| for (int i = 0; i < argc; i++) { |
| if (strcmp(argv[i], "-fallback-scsv") == 0) { |
| if (!SSL_enable_fallback_scsv(ssl)) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| } else if (strcmp(argv[i], "-key-file") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| if (!SSL_use_PrivateKey_file(ssl, argv[i], SSL_FILETYPE_PEM)) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| } else if (strcmp(argv[i], "-cert-file") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| if (!SSL_use_certificate_file(ssl, argv[i], SSL_FILETYPE_PEM)) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| } else if (strcmp(argv[i], "-expect-server-name") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| expected_server_name = argv[i]; |
| } else if (strcmp(argv[i], "-expect-certificate-types") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| // Conveniently, 00 is not a certificate type. |
| expected_certificate_types = argv[i]; |
| } else if (strcmp(argv[i], "-require-any-client-certificate") == 0) { |
| SSL_set_verify(ssl, SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT, |
| skip_verify); |
| } else if (strcmp(argv[i], "-advertise-npn") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| advertise_npn = argv[i]; |
| } else if (strcmp(argv[i], "-expect-next-proto") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| expected_next_proto = argv[i]; |
| } else if (strcmp(argv[i], "-false-start") == 0) { |
| SSL_set_mode(ssl, SSL_MODE_HANDSHAKE_CUTTHROUGH); |
| } else if (strcmp(argv[i], "-select-next-proto") == 0) { |
| i++; |
| if (i >= argc) { |
| fprintf(stderr, "Missing parameter\n"); |
| return 1; |
| } |
| select_next_proto = argv[i]; |
| } else if (strcmp(argv[i], "-async") == 0) { |
| async = true; |
| } else if (strcmp(argv[i], "-write-different-record-sizes") == 0) { |
| write_different_record_sizes = true; |
| } else if (strcmp(argv[i], "-cbc-record-splitting") == 0) { |
| SSL_set_mode(ssl, SSL_MODE_CBC_RECORD_SPLITTING); |
| } else if (strcmp(argv[i], "-partial-write") == 0) { |
| SSL_set_mode(ssl, SSL_MODE_ENABLE_PARTIAL_WRITE); |
| } else if (strcmp(argv[i], "-no-tls12") == 0) { |
| SSL_set_options(ssl, SSL_OP_NO_TLSv1_2); |
| } else if (strcmp(argv[i], "-no-tls11") == 0) { |
| SSL_set_options(ssl, SSL_OP_NO_TLSv1_1); |
| } else if (strcmp(argv[i], "-no-tls1") == 0) { |
| SSL_set_options(ssl, SSL_OP_NO_TLSv1); |
| } else if (strcmp(argv[i], "-no-ssl3") == 0) { |
| SSL_set_options(ssl, SSL_OP_NO_SSLv3); |
| } else { |
| fprintf(stderr, "Unknown argument: %s\n", argv[i]); |
| return 1; |
| } |
| } |
| |
| BIO *bio = BIO_new_fd(fd, 1 /* take ownership */); |
| if (bio == NULL) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| if (async) { |
| BIO *async = async_bio_create(); |
| BIO_push(async, bio); |
| bio = async; |
| } |
| SSL_set_bio(ssl, bio, bio); |
| |
| if (session != NULL) { |
| if (SSL_set_session(ssl, session) != 1) { |
| fprintf(stderr, "failed to set session\n"); |
| return 2; |
| } |
| } |
| |
| int ret; |
| do { |
| if (is_server) { |
| ret = SSL_accept(ssl); |
| } else { |
| ret = SSL_connect(ssl); |
| } |
| } while (async && retry_async(ssl, ret, bio)); |
| if (ret != 1) { |
| SSL_free(ssl); |
| BIO_print_errors_fp(stdout); |
| return 2; |
| } |
| |
| if (is_resume && !SSL_session_reused(ssl)) { |
| fprintf(stderr, "session was not reused\n"); |
| return 2; |
| } |
| |
| if (expected_server_name) { |
| const char *server_name = |
| SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name); |
| if (strcmp(server_name, expected_server_name) != 0) { |
| fprintf(stderr, "servername mismatch (got %s; want %s)\n", |
| server_name, expected_server_name); |
| return 2; |
| } |
| |
| if (!early_callback_called) { |
| fprintf(stderr, "early callback not called\n"); |
| return 2; |
| } |
| } |
| |
| if (expected_certificate_types) { |
| uint8_t *certificate_types; |
| int num_certificate_types = |
| SSL_get0_certificate_types(ssl, &certificate_types); |
| if (num_certificate_types != (int)strlen(expected_certificate_types) || |
| memcmp(certificate_types, |
| expected_certificate_types, |
| num_certificate_types) != 0) { |
| fprintf(stderr, "certificate types mismatch\n"); |
| return 2; |
| } |
| } |
| |
| if (expected_next_proto) { |
| const uint8_t *next_proto; |
| unsigned next_proto_len; |
| SSL_get0_next_proto_negotiated(ssl, &next_proto, &next_proto_len); |
| if (next_proto_len != strlen(expected_next_proto) || |
| memcmp(next_proto, expected_next_proto, next_proto_len) != 0) { |
| fprintf(stderr, "negotiated next proto mismatch\n"); |
| return 2; |
| } |
| } |
| |
| if (write_different_record_sizes) { |
| // This mode writes a number of different record sizes in an attempt to |
| // trip up the CBC record splitting code. |
| uint8_t buf[32769]; |
| memset(buf, 0x42, sizeof(buf)); |
| static const size_t kRecordSizes[] = { |
| 0, 1, 255, 256, 257, 16383, 16384, 16385, 32767, 32768, 32769}; |
| for (size_t i = 0; i < sizeof(kRecordSizes) / sizeof(kRecordSizes[0]); |
| i++) { |
| int w; |
| const size_t len = kRecordSizes[i]; |
| size_t off = 0; |
| |
| if (len > sizeof(buf)) { |
| fprintf(stderr, "Bad kRecordSizes value.\n"); |
| return 5; |
| } |
| |
| do { |
| w = SSL_write(ssl, buf + off, len - off); |
| if (w > 0) { |
| off += (size_t) w; |
| } |
| } while ((async && retry_async(ssl, w, bio)) || (w > 0 && off < len)); |
| |
| if (w < 0 || off != len) { |
| SSL_free(ssl); |
| BIO_print_errors_fp(stdout); |
| return 4; |
| } |
| } |
| } else { |
| for (;;) { |
| uint8_t buf[512]; |
| int n; |
| do { |
| n = SSL_read(ssl, buf, sizeof(buf)); |
| } while (async && retry_async(ssl, n, bio)); |
| if (n < 0) { |
| SSL_free(ssl); |
| BIO_print_errors_fp(stdout); |
| return 3; |
| } else if (n == 0) { |
| break; |
| } else { |
| for (int i = 0; i < n; i++) { |
| buf[i] ^= 0xff; |
| } |
| int w; |
| do { |
| w = SSL_write(ssl, buf, n); |
| } while (async && retry_async(ssl, w, bio)); |
| if (w != n) { |
| SSL_free(ssl); |
| BIO_print_errors_fp(stdout); |
| return 4; |
| } |
| } |
| } |
| } |
| |
| if (out_session) { |
| *out_session = SSL_get1_session(ssl); |
| } |
| |
| SSL_shutdown(ssl); |
| SSL_free(ssl); |
| return 0; |
| } |
| |
| int main(int argc, char **argv) { |
| int is_server, resume; |
| |
| signal(SIGPIPE, SIG_IGN); |
| |
| if (argc < 3) { |
| return usage(argv[0]); |
| } |
| |
| if (strcmp(argv[1], "client") == 0) { |
| is_server = 0; |
| } else if (strcmp(argv[1], "server") == 0) { |
| is_server = 1; |
| } else { |
| return usage(argv[0]); |
| } |
| |
| if (strcmp(argv[2], "normal") == 0) { |
| resume = 0; |
| } else if (strcmp(argv[2], "resume") == 0) { |
| resume = 1; |
| } else { |
| return usage(argv[0]); |
| } |
| |
| SSL_CTX *ssl_ctx = setup_ctx(is_server); |
| if (ssl_ctx == NULL) { |
| BIO_print_errors_fp(stdout); |
| return 1; |
| } |
| |
| SSL_SESSION *session; |
| int ret = do_exchange(&session, |
| ssl_ctx, |
| argc - 3, argv + 3, |
| is_server, 0 /* is_resume */, |
| 3 /* fd */, NULL /* session */); |
| if (ret != 0) { |
| return ret; |
| } |
| |
| if (resume) { |
| int ret = do_exchange(NULL, |
| ssl_ctx, argc - 3, argv + 3, |
| is_server, 1 /* is_resume */, |
| 4 /* fd */, |
| is_server ? NULL : session); |
| if (ret != 0) { |
| return ret; |
| } |
| } |
| |
| SSL_SESSION_free(session); |
| SSL_CTX_free(ssl_ctx); |
| return 0; |
| } |
