| /* 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 <openssl/base.h> |
| |
| #include <stdio.h> |
| |
| #if !defined(OPENSSL_WINDOWS) |
| #include <sys/select.h> |
| #else |
| OPENSSL_MSVC_PRAGMA(warning(push, 3)) |
| #include <winsock2.h> |
| OPENSSL_MSVC_PRAGMA(warning(pop)) |
| #endif |
| |
| #include <openssl/err.h> |
| #include <openssl/pem.h> |
| #include <openssl/ssl.h> |
| |
| #include "../crypto/internal.h" |
| #include "internal.h" |
| #include "transport_common.h" |
| |
| |
| static const struct argument kArguments[] = { |
| { |
| "-connect", kRequiredArgument, |
| "The hostname and port of the server to connect to, e.g. foo.com:443", |
| }, |
| { |
| "-cipher", kOptionalArgument, |
| "An OpenSSL-style cipher suite string that configures the offered " |
| "ciphers", |
| }, |
| { |
| "-curves", kOptionalArgument, |
| "An OpenSSL-style ECDH curves list that configures the offered curves", |
| }, |
| { |
| "-max-version", kOptionalArgument, |
| "The maximum acceptable protocol version", |
| }, |
| { |
| "-min-version", kOptionalArgument, |
| "The minimum acceptable protocol version", |
| }, |
| { |
| "-server-name", kOptionalArgument, "The server name to advertise", |
| }, |
| { |
| "-select-next-proto", kOptionalArgument, |
| "An NPN protocol to select if the server supports NPN", |
| }, |
| { |
| "-alpn-protos", kOptionalArgument, |
| "A comma-separated list of ALPN protocols to advertise", |
| }, |
| { |
| "-fallback-scsv", kBooleanArgument, "Enable FALLBACK_SCSV", |
| }, |
| { |
| "-ocsp-stapling", kBooleanArgument, |
| "Advertise support for OCSP stabling", |
| }, |
| { |
| "-signed-certificate-timestamps", kBooleanArgument, |
| "Advertise support for signed certificate timestamps", |
| }, |
| { |
| "-channel-id-key", kOptionalArgument, |
| "The key to use for signing a channel ID", |
| }, |
| { |
| "-false-start", kBooleanArgument, "Enable False Start", |
| }, |
| { |
| "-session-in", kOptionalArgument, |
| "A file containing a session to resume.", |
| }, |
| { |
| "-session-out", kOptionalArgument, |
| "A file to write the negotiated session to.", |
| }, |
| { |
| "-key", kOptionalArgument, |
| "PEM-encoded file containing the private key.", |
| }, |
| { |
| "-cert", kOptionalArgument, |
| "PEM-encoded file containing the leaf certificate and optional " |
| "certificate chain. This is taken from the -key argument if this " |
| "argument is not provided.", |
| }, |
| { |
| "-starttls", kOptionalArgument, |
| "A STARTTLS mini-protocol to run before the TLS handshake. Supported" |
| " values: 'smtp'", |
| }, |
| { |
| "-grease", kBooleanArgument, "Enable GREASE", |
| }, |
| { |
| "-test-resumption", kBooleanArgument, |
| "Connect to the server twice. The first connection is closed once a " |
| "session is established. The second connection offers it.", |
| }, |
| { |
| "-root-certs", kOptionalArgument, |
| "A filename containing one of more PEM root certificates. Implies that " |
| "verification is required.", |
| }, |
| { |
| "-early-data", kOptionalArgument, "Allow early data", |
| }, |
| { |
| "-tls13-variant", kOptionalArgument, |
| "Enable the specified experimental TLS 1.3 variant", |
| }, |
| { |
| "-ed25519", kBooleanArgument, "Advertise Ed25519 support", |
| }, |
| { |
| "-http-tunnel", kOptionalArgument, |
| "An HTTP proxy server to tunnel the TCP connection through", |
| }, |
| { |
| "", kOptionalArgument, "", |
| }, |
| }; |
| |
| static bssl::UniquePtr<EVP_PKEY> LoadPrivateKey(const std::string &file) { |
| bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_file())); |
| if (!bio || !BIO_read_filename(bio.get(), file.c_str())) { |
| return nullptr; |
| } |
| bssl::UniquePtr<EVP_PKEY> pkey(PEM_read_bio_PrivateKey(bio.get(), nullptr, |
| nullptr, nullptr)); |
| return pkey; |
| } |
| |
| static int NextProtoSelectCallback(SSL* ssl, uint8_t** out, uint8_t* outlen, |
| const uint8_t* in, unsigned inlen, void* arg) { |
| *out = reinterpret_cast<uint8_t *>(arg); |
| *outlen = strlen(reinterpret_cast<const char *>(arg)); |
| return SSL_TLSEXT_ERR_OK; |
| } |
| |
| static FILE *g_keylog_file = nullptr; |
| |
| static void KeyLogCallback(const SSL *ssl, const char *line) { |
| fprintf(g_keylog_file, "%s\n", line); |
| fflush(g_keylog_file); |
| } |
| |
| static bssl::UniquePtr<BIO> session_out; |
| static bssl::UniquePtr<SSL_SESSION> resume_session; |
| |
| static int NewSessionCallback(SSL *ssl, SSL_SESSION *session) { |
| if (session_out) { |
| if (!PEM_write_bio_SSL_SESSION(session_out.get(), session) || |
| BIO_flush(session_out.get()) <= 0) { |
| fprintf(stderr, "Error while saving session:\n"); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return 0; |
| } |
| } |
| resume_session = bssl::UniquePtr<SSL_SESSION>(session); |
| return 1; |
| } |
| |
| static bool WaitForSession(SSL *ssl, int sock) { |
| fd_set read_fds; |
| FD_ZERO(&read_fds); |
| |
| if (!SocketSetNonBlocking(sock, true)) { |
| return false; |
| } |
| |
| while (!resume_session) { |
| FD_SET(sock, &read_fds); |
| int ret = select(sock + 1, &read_fds, NULL, NULL, NULL); |
| if (ret <= 0) { |
| perror("select"); |
| return false; |
| } |
| |
| uint8_t buffer[512]; |
| int ssl_ret = SSL_read(ssl, buffer, sizeof(buffer)); |
| |
| if (ssl_ret <= 0) { |
| int ssl_err = SSL_get_error(ssl, ssl_ret); |
| if (ssl_err == SSL_ERROR_WANT_READ) { |
| continue; |
| } |
| fprintf(stderr, "Error while reading: %d\n", ssl_err); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| static bool DoConnection(SSL_CTX *ctx, |
| std::map<std::string, std::string> args_map, |
| bool (*cb)(SSL *ssl, int sock)) { |
| int sock = -1; |
| if (args_map.count("-http-tunnel") != 0) { |
| if (!Connect(&sock, args_map["-http-tunnel"]) || |
| !DoHTTPTunnel(sock, args_map["-connect"])) { |
| return false; |
| } |
| } else if (!Connect(&sock, args_map["-connect"])) { |
| return false; |
| } |
| |
| if (args_map.count("-starttls") != 0) { |
| const std::string& starttls = args_map["-starttls"]; |
| if (starttls == "smtp") { |
| if (!DoSMTPStartTLS(sock)) { |
| return false; |
| } |
| } else { |
| fprintf(stderr, "Unknown value for -starttls: %s\n", starttls.c_str()); |
| return false; |
| } |
| } |
| |
| bssl::UniquePtr<BIO> bio(BIO_new_socket(sock, BIO_CLOSE)); |
| bssl::UniquePtr<SSL> ssl(SSL_new(ctx)); |
| |
| if (args_map.count("-server-name") != 0) { |
| SSL_set_tlsext_host_name(ssl.get(), args_map["-server-name"].c_str()); |
| } |
| |
| if (args_map.count("-session-in") != 0) { |
| bssl::UniquePtr<BIO> in(BIO_new_file(args_map["-session-in"].c_str(), |
| "rb")); |
| if (!in) { |
| fprintf(stderr, "Error reading session\n"); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| bssl::UniquePtr<SSL_SESSION> session(PEM_read_bio_SSL_SESSION(in.get(), |
| nullptr, nullptr, nullptr)); |
| if (!session) { |
| fprintf(stderr, "Error reading session\n"); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| SSL_set_session(ssl.get(), session.get()); |
| } |
| |
| if (resume_session) { |
| SSL_set_session(ssl.get(), resume_session.get()); |
| } |
| |
| SSL_set_bio(ssl.get(), bio.get(), bio.get()); |
| bio.release(); |
| |
| int ret = SSL_connect(ssl.get()); |
| if (ret != 1) { |
| int ssl_err = SSL_get_error(ssl.get(), ret); |
| fprintf(stderr, "Error while connecting: %d\n", ssl_err); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| |
| if (args_map.count("-early-data") != 0 && SSL_in_early_data(ssl.get())) { |
| int ed_size = args_map["-early-data"].size(); |
| int ssl_ret = SSL_write(ssl.get(), args_map["-early-data"].data(), ed_size); |
| if (ssl_ret <= 0) { |
| int ssl_err = SSL_get_error(ssl.get(), ssl_ret); |
| fprintf(stderr, "Error while writing: %d\n", ssl_err); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } else if (ssl_ret != ed_size) { |
| fprintf(stderr, "Short write from SSL_write.\n"); |
| return false; |
| } |
| } |
| |
| fprintf(stderr, "Connected.\n"); |
| PrintConnectionInfo(ssl.get()); |
| |
| return cb(ssl.get(), sock); |
| } |
| |
| bool Client(const std::vector<std::string> &args) { |
| if (!InitSocketLibrary()) { |
| return false; |
| } |
| |
| std::map<std::string, std::string> args_map; |
| |
| if (!ParseKeyValueArguments(&args_map, args, kArguments)) { |
| PrintUsage(kArguments); |
| return false; |
| } |
| |
| bssl::UniquePtr<SSL_CTX> ctx(SSL_CTX_new(SSLv23_client_method())); |
| |
| const char *keylog_file = getenv("SSLKEYLOGFILE"); |
| if (keylog_file) { |
| g_keylog_file = fopen(keylog_file, "a"); |
| if (g_keylog_file == nullptr) { |
| perror("fopen"); |
| return false; |
| } |
| SSL_CTX_set_keylog_callback(ctx.get(), KeyLogCallback); |
| } |
| |
| if (args_map.count("-cipher") != 0 && |
| !SSL_CTX_set_strict_cipher_list(ctx.get(), args_map["-cipher"].c_str())) { |
| fprintf(stderr, "Failed setting cipher list\n"); |
| return false; |
| } |
| |
| if (args_map.count("-curves") != 0 && |
| !SSL_CTX_set1_curves_list(ctx.get(), args_map["-curves"].c_str())) { |
| fprintf(stderr, "Failed setting curves list\n"); |
| return false; |
| } |
| |
| uint16_t max_version = TLS1_3_VERSION; |
| if (args_map.count("-max-version") != 0 && |
| !VersionFromString(&max_version, args_map["-max-version"])) { |
| fprintf(stderr, "Unknown protocol version: '%s'\n", |
| args_map["-max-version"].c_str()); |
| return false; |
| } |
| |
| if (!SSL_CTX_set_max_proto_version(ctx.get(), max_version)) { |
| return false; |
| } |
| |
| if (args_map.count("-min-version") != 0) { |
| uint16_t version; |
| if (!VersionFromString(&version, args_map["-min-version"])) { |
| fprintf(stderr, "Unknown protocol version: '%s'\n", |
| args_map["-min-version"].c_str()); |
| return false; |
| } |
| if (!SSL_CTX_set_min_proto_version(ctx.get(), version)) { |
| return false; |
| } |
| } |
| |
| if (args_map.count("-select-next-proto") != 0) { |
| const std::string &proto = args_map["-select-next-proto"]; |
| if (proto.size() > 255) { |
| fprintf(stderr, "Bad NPN protocol: '%s'\n", proto.c_str()); |
| return false; |
| } |
| // |SSL_CTX_set_next_proto_select_cb| is not const-correct. |
| SSL_CTX_set_next_proto_select_cb(ctx.get(), NextProtoSelectCallback, |
| const_cast<char *>(proto.c_str())); |
| } |
| |
| if (args_map.count("-alpn-protos") != 0) { |
| const std::string &alpn_protos = args_map["-alpn-protos"]; |
| std::vector<uint8_t> wire; |
| size_t i = 0; |
| while (i <= alpn_protos.size()) { |
| size_t j = alpn_protos.find(',', i); |
| if (j == std::string::npos) { |
| j = alpn_protos.size(); |
| } |
| size_t len = j - i; |
| if (len > 255) { |
| fprintf(stderr, "Invalid ALPN protocols: '%s'\n", alpn_protos.c_str()); |
| return false; |
| } |
| wire.push_back(static_cast<uint8_t>(len)); |
| wire.resize(wire.size() + len); |
| OPENSSL_memcpy(wire.data() + wire.size() - len, alpn_protos.data() + i, |
| len); |
| i = j + 1; |
| } |
| if (SSL_CTX_set_alpn_protos(ctx.get(), wire.data(), wire.size()) != 0) { |
| return false; |
| } |
| } |
| |
| if (args_map.count("-fallback-scsv") != 0) { |
| SSL_CTX_set_mode(ctx.get(), SSL_MODE_SEND_FALLBACK_SCSV); |
| } |
| |
| if (args_map.count("-ocsp-stapling") != 0) { |
| SSL_CTX_enable_ocsp_stapling(ctx.get()); |
| } |
| |
| if (args_map.count("-signed-certificate-timestamps") != 0) { |
| SSL_CTX_enable_signed_cert_timestamps(ctx.get()); |
| } |
| |
| if (args_map.count("-channel-id-key") != 0) { |
| bssl::UniquePtr<EVP_PKEY> pkey = |
| LoadPrivateKey(args_map["-channel-id-key"]); |
| if (!pkey || !SSL_CTX_set1_tls_channel_id(ctx.get(), pkey.get())) { |
| return false; |
| } |
| } |
| |
| if (args_map.count("-false-start") != 0) { |
| SSL_CTX_set_mode(ctx.get(), SSL_MODE_ENABLE_FALSE_START); |
| } |
| |
| if (args_map.count("-key") != 0) { |
| const std::string &key = args_map["-key"]; |
| if (!SSL_CTX_use_PrivateKey_file(ctx.get(), key.c_str(), |
| SSL_FILETYPE_PEM)) { |
| fprintf(stderr, "Failed to load private key: %s\n", key.c_str()); |
| return false; |
| } |
| const std::string &cert = |
| args_map.count("-cert") != 0 ? args_map["-cert"] : key; |
| if (!SSL_CTX_use_certificate_chain_file(ctx.get(), cert.c_str())) { |
| fprintf(stderr, "Failed to load cert chain: %s\n", cert.c_str()); |
| return false; |
| } |
| } |
| |
| SSL_CTX_set_session_cache_mode(ctx.get(), SSL_SESS_CACHE_CLIENT); |
| SSL_CTX_sess_set_new_cb(ctx.get(), NewSessionCallback); |
| |
| if (args_map.count("-session-out") != 0) { |
| session_out.reset(BIO_new_file(args_map["-session-out"].c_str(), "wb")); |
| if (!session_out) { |
| fprintf(stderr, "Error while opening %s:\n", |
| args_map["-session-out"].c_str()); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| } |
| |
| if (args_map.count("-grease") != 0) { |
| SSL_CTX_set_grease_enabled(ctx.get(), 1); |
| } |
| |
| if (args_map.count("-root-certs") != 0) { |
| if (!SSL_CTX_load_verify_locations( |
| ctx.get(), args_map["-root-certs"].c_str(), nullptr)) { |
| fprintf(stderr, "Failed to load root certificates.\n"); |
| ERR_print_errors_cb(PrintErrorCallback, stderr); |
| return false; |
| } |
| SSL_CTX_set_verify(ctx.get(), SSL_VERIFY_PEER, nullptr); |
| } |
| |
| if (args_map.count("-early-data") != 0) { |
| SSL_CTX_set_early_data_enabled(ctx.get(), 1); |
| } |
| |
| if (args_map.count("-tls13-variant") != 0) { |
| SSL_CTX_set_tls13_variant(ctx.get(), |
| static_cast<enum tls13_variant_t>( |
| atoi(args_map["-tls13-variant"].c_str()))); |
| } |
| |
| if (args_map.count("-ed25519") != 0) { |
| SSL_CTX_set_ed25519_enabled(ctx.get(), 1); |
| } |
| |
| if (args_map.count("-test-resumption") != 0) { |
| if (args_map.count("-session-in") != 0) { |
| fprintf(stderr, |
| "Flags -session-in and -test-resumption are incompatible.\n"); |
| return false; |
| } |
| |
| if (!DoConnection(ctx.get(), args_map, &WaitForSession)) { |
| return false; |
| } |
| } |
| |
| return DoConnection(ctx.get(), args_map, &TransferData); |
| } |
