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- /* 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);
- }
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