5230455705

Committed 10 Jun 2023 02:30PM UTC coverage: 91.715% (-0.03%) from 91.746%

Build # 5230455705

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randombit

Commit Message

Merge GH #3584 Change clang-format AllowShortFunctionsOnASingleLine config from All to Inline

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87.5

/src/cli/tls_http_server.cpp

/*
* (C) 2014,2015,2017,2019 Jack Lloyd
* (C) 2016 Matthias Gierlings
* (C) 2023 René Meusel, Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/

#include "cli.h"

#if defined(BOTAN_HAS_TLS) && defined(BOTAN_HAS_BOOST_ASIO) && defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)

   #include <atomic>
   #include <fstream>
   #include <iomanip>
   #include <iostream>
   #include <string>
   #include <thread>
   #include <vector>

   #define _GLIBCXX_HAVE_GTHR_DEFAULT
   #include <botan/internal/os_utils.h>
   #include <boost/asio.hpp>
   #include <boost/bind.hpp>

   #include <botan/hex.h>
   #include <botan/pkcs8.h>
   #include <botan/rng.h>
   #include <botan/tls_messages.h>
   #include <botan/tls_server.h>
   #include <botan/tls_session_manager_memory.h>
   #include <botan/version.h>
   #include <botan/x509cert.h>

   #if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
      #include <botan/tls_session_manager_sqlite.h>
   #endif

   #include "tls_helpers.h"

   #if BOOST_VERSION >= 107000
      #define GET_IO_SERVICE(s) (static_cast<boost::asio::io_context&>((s).get_executor().context()))
   #else
      #define GET_IO_SERVICE(s) ((s).get_io_service())
   #endif

namespace Botan_CLI {

namespace {

using boost::asio::ip::tcp;

inline void log_error(const char* msg) {
   std::cout << msg << std::endl;
}

inline void log_exception(const char* where, const std::exception& e) {
   std::cout << where << ' ' << e.what() << std::endl;
}

class ServerStatus {
   public:
      ServerStatus(size_t max_clients) : m_max_clients(max_clients), m_clients_serviced(0) {}

      bool should_exit() const {
         if(m_max_clients == 0)
            return false;

         return clients_serviced() >= m_max_clients;
      }

      void client_serviced() { m_clients_serviced++; }

      size_t clients_serviced() const { return m_clients_serviced.load(); }

   private:
      size_t m_max_clients;
      std::atomic<size_t> m_clients_serviced;
};

/*
* This is an incomplete and highly buggy HTTP request parser. It is just
* barely sufficient to handle a GET request sent by a browser.
*/
class HTTP_Parser final {
   public:
      class Request {
         public:
            const std::string& verb() const { return m_verb; }

            const std::string& location() const { return m_location; }

            const std::map<std::string, std::string>& headers() const { return m_headers; }

            Request(const std::string& verb,
                    const std::string& location,
                    const std::map<std::string, std::string>& headers) :
                  m_verb(verb), m_location(location), m_headers(headers) {}

         private:
            std::string m_verb;
            std::string m_location;
            std::map<std::string, std::string> m_headers;
      };

      class Callbacks {
         public:
            virtual void handle_http_request(const Request& request) = 0;
            virtual ~Callbacks() = default;
      };

      HTTP_Parser(Callbacks& cb) : m_cb(cb) {}

      void consume_input(std::span<const uint8_t> buf) {
         m_req_buf.append(reinterpret_cast<const char*>(buf.data()), buf.size());

         std::istringstream strm(m_req_buf);

         std::string http_version;
         std::string verb;
         std::string location;
         std::map<std::string, std::string> headers;

         strm >> verb >> location >> http_version;

         if(verb.empty() || location.empty())
            return;

         while(true) {
            std::string header_line;
            std::getline(strm, header_line);

            if(header_line == "\r") {
               continue;
            }

            auto delim = header_line.find(": ");
            if(delim == std::string::npos) {
               break;
            }

            const std::string hdr_name = header_line.substr(0, delim);
            const std::string hdr_val = header_line.substr(delim + 2, std::string::npos);

            headers[hdr_name] = hdr_val;

            if(headers.size() > 1024)
               throw Botan::Invalid_Argument("Too many HTTP headers sent in request");
         }

         if(verb != "" && location != "") {
            Request req(verb, location, headers);
            m_cb.handle_http_request(req);
            m_req_buf.clear();
         } else
            printf("ignoring\n");
      }

   private:
      Callbacks& m_cb;
      std::string m_req_buf;
};

static const size_t READBUF_SIZE = 4096;

class TLS_Asio_HTTP_Session final : public std::enable_shared_from_this<TLS_Asio_HTTP_Session>,
                                    public Botan::TLS::Callbacks,
                                    public HTTP_Parser::Callbacks {
   public:
      typedef std::shared_ptr<TLS_Asio_HTTP_Session> pointer;

      static pointer create(boost::asio::io_service& io,
                            std::shared_ptr<Botan::TLS::Session_Manager> session_manager,
                            std::shared_ptr<Botan::Credentials_Manager> credentials,
                            std::shared_ptr<Botan::TLS::Policy> policy) {
         auto session = std::make_shared<TLS_Asio_HTTP_Session>(io);

         // Defer the setup of the TLS server to make use of
         // shared_from_this() which wouldn't work in the c'tor.
         session->setup(session_manager, credentials, policy);

         return session;
      }

      tcp::socket& client_socket() { return m_client_socket; }

      void start() {
         m_c2s.resize(READBUF_SIZE);
         client_read(boost::system::error_code(), 0);  // start read loop
      }

      void stop() {
         m_tls->close();

         // Need to explicitly destroy the TLS::Server object to break the
         // circular ownership of shared_from_this() and the shared_ptr of
         // this kept inside the TLS::Channel.
         m_tls.reset();
      }

      TLS_Asio_HTTP_Session(boost::asio::io_service& io) : m_strand(io), m_client_socket(io), m_rng(cli_make_rng()) {}

   private:
      void setup(std::shared_ptr<Botan::TLS::Session_Manager> session_manager,
                 std::shared_ptr<Botan::Credentials_Manager> credentials,
                 std::shared_ptr<Botan::TLS::Policy> policy) {
         m_tls = std::make_unique<Botan::TLS::Server>(shared_from_this(), session_manager, credentials, policy, m_rng);
      }

      void client_read(const boost::system::error_code& error, size_t bytes_transferred) {
         if(error) {
            return stop();
         }

         if(!m_tls) {
            log_error("Received client data after close");
            return;
         }

         try {
            m_tls->received_data(&m_c2s[0], bytes_transferred);
         } catch(Botan::Exception& e) {
            log_exception("TLS connection failed", e);
            return stop();
         }

         m_client_socket.async_read_some(boost::asio::buffer(&m_c2s[0], m_c2s.size()),
                                         m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::client_read,
                                                                   shared_from_this(),
                                                                   boost::asio::placeholders::error,
                                                                   boost::asio::placeholders::bytes_transferred)));
      }

      void handle_client_write_completion(const boost::system::error_code& error) {
         if(error) {
            return stop();
         }

         m_s2c.clear();

         if(m_s2c_pending.empty() && (!m_tls || m_tls->is_closed_for_writing())) {
            m_client_socket.close();
         }
         tls_emit_data({});  // initiate another write if needed
      }

      std::string tls_server_choose_app_protocol(const std::vector<std::string>& /*client_protos*/) override {
         return "http/1.1";
      }

      void tls_record_received(uint64_t /*rec_no*/, std::span<const uint8_t> buf) override {
         if(!m_http_parser)
            m_http_parser.reset(new HTTP_Parser(*this));

         m_http_parser->consume_input(buf);
      }

      std::string summarize_request(const HTTP_Parser::Request& request) {
         std::ostringstream strm;

         strm << "Client " << client_socket().remote_endpoint().address().to_string() << " requested " << request.verb()
              << " " << request.location() << "\n";

         if(request.headers().empty() == false) {
            strm << "Client HTTP headers:\n";
            for(auto kv : request.headers())
               strm << " " << kv.first << ": " << kv.second << "\n";
         }

         return strm.str();
      }

      void handle_http_request(const HTTP_Parser::Request& request) override {
         std::ostringstream response;
         if(request.verb() == "GET") {
            if(request.location() == "/" || request.location() == "/status") {
               const std::string http_summary = summarize_request(request);

               const std::string report = m_connection_summary + m_session_summary + m_chello_summary + http_summary;

               response << "HTTP/1.0 200 OK\r\n";
               response << "Server: " << Botan::version_string() << "\r\n";
               response << "Content-Type: text/plain\r\n";
               response << "Content-Length: " << report.size() << "\r\n";
               response << "\r\n";

               response << report;
            } else {
               response << "HTTP/1.0 404 Not Found\r\n\r\n";
            }
         } else {
            response << "HTTP/1.0 405 Method Not Allowed\r\n\r\n";
         }

         const std::string response_str = response.str();
         m_tls->send(response_str);
         m_tls->close();
      }

      void tls_emit_data(std::span<const uint8_t> buf) override {
         if(!buf.empty()) {
            m_s2c_pending.insert(m_s2c_pending.end(), buf.begin(), buf.end());
         }

         // no write now active and we still have output pending
         if(m_s2c.empty() && !m_s2c_pending.empty()) {
            std::swap(m_s2c_pending, m_s2c);

            boost::asio::async_write(m_client_socket,
                                     boost::asio::buffer(&m_s2c[0], m_s2c.size()),
                                     m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::handle_client_write_completion,
                                                               shared_from_this(),
                                                               boost::asio::placeholders::error)));
         }
      }

      void tls_session_activated() override {
         std::ostringstream strm;

         strm << "TLS negotiation with " << Botan::version_string() << " test server\n\n";

         m_connection_summary = strm.str();
      }

      void tls_session_established(const Botan::TLS::Session_Summary& session) override {
         std::ostringstream strm;

         strm << "Version: " << session.version().to_string() << "\n";
         strm << "Ciphersuite: " << session.ciphersuite().to_string() << "\n";
         if(const auto& session_id = session.session_id(); !session_id.empty()) {
            strm << "SessionID: " << Botan::hex_encode(session_id.get()) << "\n";
         }
         if(!session.server_info().hostname().empty()) {
            strm << "SNI: " << session.server_info().hostname() << "\n";
         }

         m_session_summary = strm.str();
      }

      void tls_inspect_handshake_msg(const Botan::TLS::Handshake_Message& message) override {
         if(message.type() == Botan::TLS::Handshake_Type::ClientHello) {
            const Botan::TLS::Client_Hello& client_hello = dynamic_cast<const Botan::TLS::Client_Hello&>(message);

            std::ostringstream strm;

            strm << "Client random: " << Botan::hex_encode(client_hello.random()) << "\n";

            strm << "Client offered following ciphersuites:\n";
            for(uint16_t suite_id : client_hello.ciphersuites()) {
               const auto ciphersuite = Botan::TLS::Ciphersuite::by_id(suite_id);

               strm << " - 0x" << std::hex << std::setfill('0') << std::setw(4) << suite_id << std::dec
                    << std::setfill(' ') << std::setw(0) << " ";

               if(ciphersuite && ciphersuite->valid())
                  strm << ciphersuite->to_string() << "\n";
               else if(suite_id == 0x00FF)
                  strm << "Renegotiation SCSV\n";
               else
                  strm << "Unknown ciphersuite\n";
            }

            m_chello_summary = strm.str();
         }
      }

      void tls_alert(Botan::TLS::Alert alert) override {
         if(alert.type() == Botan::TLS::Alert::CloseNotify) {
            m_tls->close();
         } else {
            std::cout << "Alert " << alert.type_string() << std::endl;
         }
      }

      boost::asio::io_service::strand m_strand;

      tcp::socket m_client_socket;

      std::shared_ptr<Botan::RandomNumberGenerator> m_rng;
      std::unique_ptr<Botan::TLS::Server> m_tls;
      std::string m_chello_summary;
      std::string m_connection_summary;
      std::string m_session_summary;
      std::unique_ptr<HTTP_Parser> m_http_parser;

      std::vector<uint8_t> m_c2s;
      std::vector<uint8_t> m_s2c;
      std::vector<uint8_t> m_s2c_pending;
};

class TLS_Asio_HTTP_Server final {
   public:
      typedef TLS_Asio_HTTP_Session session;

      TLS_Asio_HTTP_Server(boost::asio::io_service& io,
                           unsigned short port,
                           std::shared_ptr<Botan::Credentials_Manager> creds,
                           std::shared_ptr<Botan::TLS::Policy> policy,
                           std::shared_ptr<Botan::TLS::Session_Manager> session_mgr,
                           size_t max_clients) :
            m_acceptor(io, tcp::endpoint(tcp::v4(), port)),
            m_creds(creds),
            m_policy(policy),
            m_session_manager(session_mgr),
            m_status(max_clients) {
         serve_one_session();
      }

   private:
      void serve_one_session() {
         auto new_session = session::create(GET_IO_SERVICE(m_acceptor), m_session_manager, m_creds, m_policy);
         ;

         m_acceptor.async_accept(
            new_session->client_socket(),
            boost::bind(&TLS_Asio_HTTP_Server::handle_accept, this, new_session, boost::asio::placeholders::error));
      }

      void handle_accept(session::pointer new_session, const boost::system::error_code& error) {
         if(!error) {
            new_session->start();
            m_status.client_serviced();

            if(!m_status.should_exit()) {
               serve_one_session();
            }
         }
      }

      tcp::acceptor m_acceptor;

      std::shared_ptr<Botan::Credentials_Manager> m_creds;
      std::shared_ptr<Botan::TLS::Policy> m_policy;
      std::shared_ptr<Botan::TLS::Session_Manager> m_session_manager;
      ServerStatus m_status;
};

}  // namespace

class TLS_HTTP_Server final : public Command {
   public:
      TLS_HTTP_Server() :
            Command(
               "tls_http_server server_cert server_key "
               "--port=443 --policy=default --threads=0 --max-clients=0 "
               "--session-db= --session-db-pass=") {}

      std::string group() const override { return "tls"; }

      std::string description() const override { return "Provides a simple HTTP server"; }

      size_t thread_count() const {
         if(size_t t = get_arg_sz("threads"))
            return t;
         if(size_t t = Botan::OS::get_cpu_available())
            return t;
         return 2;
      }

      void go() override {
         const uint16_t listen_port = get_arg_u16("port");

         const std::string server_crt = get_arg("server_cert");
         const std::string server_key = get_arg("server_key");

         const size_t num_threads = thread_count();
         const size_t max_clients = get_arg_sz("max-clients");

         auto creds = std::make_shared<Basic_Credentials_Manager>(server_crt, server_key);

         auto policy = load_tls_policy(get_arg("policy"));

         std::shared_ptr<Botan::TLS::Session_Manager> session_mgr;

         const std::string sessions_db = get_arg("session-db");

         if(!sessions_db.empty()) {
   #if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
            const std::string sessions_passphrase = get_passphrase_arg("Session DB passphrase", "session-db-pass");
            session_mgr.reset(
               new Botan::TLS::Session_Manager_SQLite(sessions_passphrase, rng_as_shared(), sessions_db));
   #else
            throw CLI_Error_Unsupported("Sqlite3 support not available");
   #endif
         }

         if(!session_mgr) {
            session_mgr.reset(new Botan::TLS::Session_Manager_In_Memory(rng_as_shared()));
         }

         boost::asio::io_service io;

         TLS_Asio_HTTP_Server server(io, listen_port, creds, policy, session_mgr, max_clients);

         std::vector<std::shared_ptr<std::thread>> threads;

         // run forever... first thread is main calling io.run below
         for(size_t i = 2; i <= num_threads; ++i) {
            threads.push_back(std::make_shared<std::thread>([&io]() { io.run(); }));
         }

         io.run();

         for(size_t i = 0; i < threads.size(); ++i) {
            threads[i]->join();
         }
      }
};

BOTAN_REGISTER_COMMAND("tls_http_server", TLS_HTTP_Server);

}  // namespace Botan_CLI

#endif

1	/*
2	* (C) 2014,2015,2017,2019 Jack Lloyd
3	* (C) 2016 Matthias Gierlings
4	* (C) 2023 René Meusel, Rohde & Schwarz Cybersecurity
5	*
6	* Botan is released under the Simplified BSD License (see license.txt)
7	*/
8
9	#include "cli.h"
10
11	#if defined(BOTAN_HAS_TLS) && defined(BOTAN_HAS_BOOST_ASIO) && defined(BOTAN_TARGET_OS_HAS_FILESYSTEM)
12
13	#include <atomic>
14	#include <fstream>
15	#include <iomanip>
16	#include <iostream>
17	#include <string>
18	#include <thread>
19	#include <vector>
20
21	#define _GLIBCXX_HAVE_GTHR_DEFAULT
22	#include <botan/internal/os_utils.h>
23	#include <boost/asio.hpp>
24	#include <boost/bind.hpp>
25
26	#include <botan/hex.h>
27	#include <botan/pkcs8.h>
28	#include <botan/rng.h>
29	#include <botan/tls_messages.h>
30	#include <botan/tls_server.h>
31	#include <botan/tls_session_manager_memory.h>
32	#include <botan/version.h>
33	#include <botan/x509cert.h>
34
35	#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
36	#include <botan/tls_session_manager_sqlite.h>
37	#endif
38
39	#include "tls_helpers.h"
40
41	#if BOOST_VERSION >= 107000
42	#define GET_IO_SERVICE(s) (static_cast<boost::asio::io_context&>((s).get_executor().context()))
43	#else
44	#define GET_IO_SERVICE(s) ((s).get_io_service())
45	#endif
46
47	namespace Botan_CLI {
48
49	namespace {
50
51	using boost::asio::ip::tcp;
52
53	inline void log_error(const char* msg) {	×
54	std::cout << msg << std::endl;	×
55	}
56
57	inline void log_exception(const char* where, const std::exception& e) {	×
58	std::cout << where << ' ' << e.what() << std::endl;	×
59	}	×
60
61	class ServerStatus {
62	public:
63	ServerStatus(size_t max_clients) : m_max_clients(max_clients), m_clients_serviced(0) {}	1✔
64
65	bool should_exit() const {	4✔
66	if(m_max_clients == 0)	4✔
67	return false;
68
69	return clients_serviced() >= m_max_clients;	4✔
70	}
71
72	void client_serviced() { m_clients_serviced++; }	4✔
73
74	size_t clients_serviced() const { return m_clients_serviced.load(); }	4✔
75
76	private:
77	size_t m_max_clients;
78	std::atomic<size_t> m_clients_serviced;
79	};
80
81	/*
82	* This is an incomplete and highly buggy HTTP request parser. It is just
83	* barely sufficient to handle a GET request sent by a browser.
84	*/
85	class HTTP_Parser final {	12✔
86	public:
87	class Request {
88	public:
89	const std::string& verb() const { return m_verb; }	6✔
90
91	const std::string& location() const { return m_location; }	4✔
92
93	const std::map<std::string, std::string>& headers() const { return m_headers; }	4✔
94
95	Request(const std::string& verb,	4✔
96	const std::string& location,
97	const std::map<std::string, std::string>& headers) :	4✔
98	m_verb(verb), m_location(location), m_headers(headers) {}	8✔
99
100	private:
101	std::string m_verb;
102	std::string m_location;
103	std::map<std::string, std::string> m_headers;
104	};
105
106	class Callbacks {	4✔
107	public:
108	virtual void handle_http_request(const Request& request) = 0;
109	virtual ~Callbacks() = default;	×
110	};
111
112	HTTP_Parser(Callbacks& cb) : m_cb(cb) {}	4✔
113
114	void consume_input(std::span<const uint8_t> buf) {	4✔
115	m_req_buf.append(reinterpret_cast<const char*>(buf.data()), buf.size());	4✔
116
117	std::istringstream strm(m_req_buf);	4✔
118
119	std::string http_version;	4✔
120	std::string verb;	4✔
121	std::string location;	4✔
122	std::map<std::string, std::string> headers;	4✔
123
124	strm >> verb >> location >> http_version;	4✔
125
126	if(verb.empty() \|\| location.empty())	4✔
127	return;	×
128
129	while(true) {	22✔
130	std::string header_line;	22✔
131	std::getline(strm, header_line);	22✔
132
133	if(header_line == "\r") {	22✔
134	continue;	8✔
135	}
136
137	auto delim = header_line.find(": ");	14✔
138	if(delim == std::string::npos) {	14✔
139	break;
140	}
141
142	const std::string hdr_name = header_line.substr(0, delim);	10✔
143	const std::string hdr_val = header_line.substr(delim + 2, std::string::npos);	10✔
144
145	headers[hdr_name] = hdr_val;	10✔
146
147	if(headers.size() > 1024)	10✔
148	throw Botan::Invalid_Argument("Too many HTTP headers sent in request");	×
149	}	28✔
150
151	if(verb != "" && location != "") {	4✔
152	Request req(verb, location, headers);	4✔
153	m_cb.handle_http_request(req);	4✔
154	m_req_buf.clear();	4✔
155	} else	4✔
156	printf("ignoring\n");	4✔
157	}	4✔
158
159	private:
160	Callbacks& m_cb;
161	std::string m_req_buf;
162	};
163
164	static const size_t READBUF_SIZE = 4096;
165
166	class TLS_Asio_HTTP_Session final : public std::enable_shared_from_this<TLS_Asio_HTTP_Session>,
167	public Botan::TLS::Callbacks,
168	public HTTP_Parser::Callbacks {
169	public:
170	typedef std::shared_ptr<TLS_Asio_HTTP_Session> pointer;
171
172	static pointer create(boost::asio::io_service& io,	4✔
173	std::shared_ptr<Botan::TLS::Session_Manager> session_manager,
174	std::shared_ptr<Botan::Credentials_Manager> credentials,
175	std::shared_ptr<Botan::TLS::Policy> policy) {
176	auto session = std::make_shared<TLS_Asio_HTTP_Session>(io);	4✔
177
178	// Defer the setup of the TLS server to make use of
179	// shared_from_this() which wouldn't work in the c'tor.
180	session->setup(session_manager, credentials, policy);	12✔
181
182	return session;	4✔
183	}	×
184
185	tcp::socket& client_socket() { return m_client_socket; }
186
187	void start() {	4✔
188	m_c2s.resize(READBUF_SIZE);	4✔
189	client_read(boost::system::error_code(), 0); // start read loop	4✔
190	}	4✔
191
192	void stop() {	4✔
193	m_tls->close();	4✔
194
195	// Need to explicitly destroy the TLS::Server object to break the
196	// circular ownership of shared_from_this() and the shared_ptr of
197	// this kept inside the TLS::Channel.
198	m_tls.reset();	4✔
199	}	4✔
200
201	TLS_Asio_HTTP_Session(boost::asio::io_service& io) : m_strand(io), m_client_socket(io), m_rng(cli_make_rng()) {}	12✔
202
203	private:
204	void setup(std::shared_ptr<Botan::TLS::Session_Manager> session_manager,	4✔
205	std::shared_ptr<Botan::Credentials_Manager> credentials,
206	std::shared_ptr<Botan::TLS::Policy> policy) {
207	m_tls = std::make_unique<Botan::TLS::Server>(shared_from_this(), session_manager, credentials, policy, m_rng);	4✔
208	}	4✔
209
210	void client_read(const boost::system::error_code& error, size_t bytes_transferred) {	20✔
211	if(error) {	20✔
212	return stop();	4✔
213	}
214
215	if(!m_tls) {	16✔
216	log_error("Received client data after close");	×
217	return;	×
218	}
219
220	try {	16✔
221	m_tls->received_data(&m_c2s[0], bytes_transferred);	16✔
222	} catch(Botan::Exception& e) {	×
223	log_exception("TLS connection failed", e);	×
224	return stop();	×
225	}	×
226
227	m_client_socket.async_read_some(boost::asio::buffer(&m_c2s[0], m_c2s.size()),	32✔
228	m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::client_read,	32✔
229	shared_from_this(),	32✔
230	boost::asio::placeholders::error,
231	boost::asio::placeholders::bytes_transferred)));
232	}
233
234	void handle_client_write_completion(const boost::system::error_code& error) {	21✔
235	if(error) {	21✔
236	return stop();	×
237	}
238
239	m_s2c.clear();	21✔
240
241	if(m_s2c_pending.empty() && (!m_tls \|\| m_tls->is_closed_for_writing())) {	21✔
242	m_client_socket.close();	4✔
243	}
244	tls_emit_data({}); // initiate another write if needed	21✔
245	}
246
247	std::string tls_server_choose_app_protocol(const std::vector<std::string>& /client_protos/) override {	×
248	return "http/1.1";	×
249	}
250
251	void tls_record_received(uint64_t /rec_no/, std::span<const uint8_t> buf) override {	4✔
252	if(!m_http_parser)	4✔
253	m_http_parser.reset(new HTTP_Parser(*this));	4✔
254
255	m_http_parser->consume_input(buf);	4✔
256	}	4✔
257
258	std::string summarize_request(const HTTP_Parser::Request& request) {	2✔
259	std::ostringstream strm;	2✔
260
261	strm << "Client " << client_socket().remote_endpoint().address().to_string() << " requested " << request.verb()	4✔
262	<< " " << request.location() << "\n";	4✔
263
264	if(request.headers().empty() == false) {	2✔
265	strm << "Client HTTP headers:\n";	2✔
266	for(auto kv : request.headers())	6✔
267	strm << " " << kv.first << ": " << kv.second << "\n";	4✔
268	}
269
270	return strm.str();	4✔
271	}	2✔
272
273	void handle_http_request(const HTTP_Parser::Request& request) override {	4✔
274	std::ostringstream response;	4✔
275	if(request.verb() == "GET") {	4✔
276	if(request.location() == "/" \|\| request.location() == "/status") {	2✔
277	const std::string http_summary = summarize_request(request);	2✔
278
279	const std::string report = m_connection_summary + m_session_summary + m_chello_summary + http_summary;	4✔
280
281	response << "HTTP/1.0 200 OK\r\n";	2✔
282	response << "Server: " << Botan::version_string() << "\r\n";	4✔
283	response << "Content-Type: text/plain\r\n";	2✔
284	response << "Content-Length: " << report.size() << "\r\n";	2✔
285	response << "\r\n";	2✔
286
287	response << report;	2✔
288	} else {	4✔
289	response << "HTTP/1.0 404 Not Found\r\n\r\n";	×
290	}
291	} else {
292	response << "HTTP/1.0 405 Method Not Allowed\r\n\r\n";	2✔
293	}
294
295	const std::string response_str = response.str();	4✔
296	m_tls->send(response_str);	4✔
297	m_tls->close();	4✔
298	}	4✔
299
300	void tls_emit_data(std::span<const uint8_t> buf) override {	49✔
301	if(!buf.empty()) {	49✔
302	m_s2c_pending.insert(m_s2c_pending.end(), buf.begin(), buf.end());	28✔
303	}
304
305	// no write now active and we still have output pending
306	if(m_s2c.empty() && !m_s2c_pending.empty()) {	49✔
307	std::swap(m_s2c_pending, m_s2c);	21✔
308
309	boost::asio::async_write(m_client_socket,	21✔
310	boost::asio::buffer(&m_s2c[0], m_s2c.size()),	21✔
311	m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::handle_client_write_completion,	42✔
312	shared_from_this(),	42✔
313	boost::asio::placeholders::error)));
314	}
315	}	49✔
316
317	void tls_session_activated() override {	4✔
318	std::ostringstream strm;	4✔
319
320	strm << "TLS negotiation with " << Botan::version_string() << " test server\n\n";	8✔
321
322	m_connection_summary = strm.str();	4✔
323	}	4✔
324
325	void tls_session_established(const Botan::TLS::Session_Summary& session) override {	4✔
326	std::ostringstream strm;	4✔
327
328	strm << "Version: " << session.version().to_string() << "\n";	8✔
329	strm << "Ciphersuite: " << session.ciphersuite().to_string() << "\n";	8✔
330	if(const auto& session_id = session.session_id(); !session_id.empty()) {	4✔
331	strm << "SessionID: " << Botan::hex_encode(session_id.get()) << "\n";	8✔
332	}
333	if(!session.server_info().hostname().empty()) {	8✔
334	strm << "SNI: " << session.server_info().hostname() << "\n";	12✔
335	}
336
337	m_session_summary = strm.str();	4✔
338	}	4✔
339
340	void tls_inspect_handshake_msg(const Botan::TLS::Handshake_Message& message) override {	34✔
341	if(message.type() == Botan::TLS::Handshake_Type::ClientHello) {	34✔
342	const Botan::TLS::Client_Hello& client_hello = dynamic_cast<const Botan::TLS::Client_Hello&>(message);	6✔
343
344	std::ostringstream strm;	6✔
345
346	strm << "Client random: " << Botan::hex_encode(client_hello.random()) << "\n";	6✔
347
348	strm << "Client offered following ciphersuites:\n";	6✔
349	for(uint16_t suite_id : client_hello.ciphersuites()) {	74✔
350	const auto ciphersuite = Botan::TLS::Ciphersuite::by_id(suite_id);	68✔
351
352	strm << " - 0x" << std::hex << std::setfill('0') << std::setw(4) << suite_id << std::dec	68✔
353	<< std::setfill(' ') << std::setw(0) << " ";	68✔
354
355	if(ciphersuite && ciphersuite->valid())	68✔
356	strm << ciphersuite->to_string() << "\n";	186✔
357	else if(suite_id == 0x00FF)	6✔
358	strm << "Renegotiation SCSV\n";	6✔
359	else
360	strm << "Unknown ciphersuite\n";	×
361	}
362
363	m_chello_summary = strm.str();	6✔
364	}	6✔
365	}	34✔
366
367	void tls_alert(Botan::TLS::Alert alert) override {	×
368	if(alert.type() == Botan::TLS::Alert::CloseNotify) {	×
369	m_tls->close();	×
370	} else {
371	std::cout << "Alert " << alert.type_string() << std::endl;	×
372	}
373	}	×
374
375	boost::asio::io_service::strand m_strand;
376
377	tcp::socket m_client_socket;
378
379	std::shared_ptr<Botan::RandomNumberGenerator> m_rng;
380	std::unique_ptr<Botan::TLS::Server> m_tls;
381	std::string m_chello_summary;
382	std::string m_connection_summary;
383	std::string m_session_summary;
384	std::unique_ptr<HTTP_Parser> m_http_parser;
385
386	std::vector<uint8_t> m_c2s;
387	std::vector<uint8_t> m_s2c;
388	std::vector<uint8_t> m_s2c_pending;
389	};
390
391	class TLS_Asio_HTTP_Server final {
392	public:
393	typedef TLS_Asio_HTTP_Session session;
394
395	TLS_Asio_HTTP_Server(boost::asio::io_service& io,	1✔
396	unsigned short port,
397	std::shared_ptr<Botan::Credentials_Manager> creds,
398	std::shared_ptr<Botan::TLS::Policy> policy,
399	std::shared_ptr<Botan::TLS::Session_Manager> session_mgr,
400	size_t max_clients) :	1✔
401	m_acceptor(io, tcp::endpoint(tcp::v4(), port)),	1✔
402	m_creds(creds),	1✔
403	m_policy(policy),	1✔
404	m_session_manager(session_mgr),	1✔
405	m_status(max_clients) {	1✔
406	serve_one_session();	1✔
407	}	1✔
408
409	private:
410	void serve_one_session() {	4✔
411	auto new_session = session::create(GET_IO_SERVICE(m_acceptor), m_session_manager, m_creds, m_policy);	20✔
412	;	4✔
413
414	m_acceptor.async_accept(	8✔
415	new_session->client_socket(),	4✔
416	boost::bind(&TLS_Asio_HTTP_Server::handle_accept, this, new_session, boost::asio::placeholders::error));	12✔
417	}	4✔
418
419	void handle_accept(session::pointer new_session, const boost::system::error_code& error) {	4✔
420	if(!error) {	4✔
421	new_session->start();	4✔
422	m_status.client_serviced();	4✔
423
424	if(!m_status.should_exit()) {	4✔
425	serve_one_session();	3✔
426	}
427	}
428	}	4✔
429
430	tcp::acceptor m_acceptor;
431
432	std::shared_ptr<Botan::Credentials_Manager> m_creds;
433	std::shared_ptr<Botan::TLS::Policy> m_policy;
434	std::shared_ptr<Botan::TLS::Session_Manager> m_session_manager;
435	ServerStatus m_status;
436	};
437
438	} // namespace
439
440	class TLS_HTTP_Server final : public Command {
441	public:
442	TLS_HTTP_Server() :	2✔
443	Command(
444	"tls_http_server server_cert server_key "
445	"--port=443 --policy=default --threads=0 --max-clients=0 "
446	"--session-db= --session-db-pass=") {}	4✔
447
448	std::string group() const override { return "tls"; }	1✔
449
450	std::string description() const override { return "Provides a simple HTTP server"; }	1✔
451
452	size_t thread_count() const {	1✔
453	if(size_t t = get_arg_sz("threads"))	1✔
454	return t;
455	if(size_t t = Botan::OS::get_cpu_available())	1✔
456	return t;	1✔
457	return 2;
458	}
459
460	void go() override {	1✔
461	const uint16_t listen_port = get_arg_u16("port");	1✔
462
463	const std::string server_crt = get_arg("server_cert");	1✔
464	const std::string server_key = get_arg("server_key");	1✔
465
466	const size_t num_threads = thread_count();	1✔
467	const size_t max_clients = get_arg_sz("max-clients");	1✔
468
469	auto creds = std::make_shared<Basic_Credentials_Manager>(server_crt, server_key);	1✔
470
471	auto policy = load_tls_policy(get_arg("policy"));	2✔
472
473	std::shared_ptr<Botan::TLS::Session_Manager> session_mgr;	1✔
474
475	const std::string sessions_db = get_arg("session-db");	1✔
476
477	if(!sessions_db.empty()) {	1✔
478	#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
479	const std::string sessions_passphrase = get_passphrase_arg("Session DB passphrase", "session-db-pass");	×
480	session_mgr.reset(	×
481	new Botan::TLS::Session_Manager_SQLite(sessions_passphrase, rng_as_shared(), sessions_db));	×
482	#else
483	throw CLI_Error_Unsupported("Sqlite3 support not available");
484	#endif
485	}	×
486
487	if(!session_mgr) {	1✔
488	session_mgr.reset(new Botan::TLS::Session_Manager_In_Memory(rng_as_shared()));	2✔
489	}
490
491	boost::asio::io_service io;	1✔
492
493	TLS_Asio_HTTP_Server server(io, listen_port, creds, policy, session_mgr, max_clients);	3✔
494
495	std::vector<std::shared_ptr<std::thread>> threads;	1✔
496
497	// run forever... first thread is main calling io.run below
498	for(size_t i = 2; i <= num_threads; ++i) {	2✔
499	threads.push_back(std::make_shared<std::thread>([&io]() { io.run(); }));	2✔
500	}
501
502	io.run();	1✔
503
504	for(size_t i = 0; i < threads.size(); ++i) {	2✔
505	threads[i]->join();	1✔
506	}
507	}	6✔
508	};
509
510	BOTAN_REGISTER_COMMAND("tls_http_server", TLS_HTTP_Server);	2✔
511
512	} // namespace Botan_CLI
513
514	#endif

randombit / botan / 5230455705

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