5655173672

Committed 25 Jul 2023 09:40AM UTC coverage: 91.696% (-0.002%) from 91.698%

Build # 5655173672

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github

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web-flow

Commit Message

Merge pull request #3634 from FAlbertDev/fix/tls_http_server_segfault

Fix: Segfault in tls_http_server

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86.08

/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 <memory>
   #include <string>
   #include <thread>
   #include <utility>
   #include <vector>

   #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"

namespace Botan_CLI {

namespace {

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

template <typename T>
boost::asio::io_context& get_io_service(T& s) {
   #if BOOST_VERSION >= 107000
   return static_cast<boost::asio::io_context&>((s).get_executor().context());
   #else
   return s.get_io_service();
   #endif
}

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;

            Callbacks() = default;

            Callbacks(const Callbacks& other) = delete;
            Callbacks(Callbacks&& other) = delete;
            Callbacks& operator=(const Callbacks& other) = delete;
            Callbacks& operator=(Callbacks&&) = delete;
      };

      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.empty() && !location.empty()) {
            Request req(verb, location, headers);
            m_cb.handle_http_request(req);
            m_req_buf.clear();
         }
      }

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

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,
                            const std::shared_ptr<Botan::TLS::Session_Manager>& session_manager,
                            const std::shared_ptr<Botan::Credentials_Manager>& credentials,
                            const 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() {
         if(!m_tls) {
            // Server is already closed
            return;
         }

         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(const std::shared_ptr<Botan::TLS::Session_Manager>& session_manager,
                 const std::shared_ptr<Botan::Credentials_Manager>& credentials,
                 const 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 = std::make_unique<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(const auto& kv : request.headers()) {
               strm << " " << kv.first << ": " << kv.second << "\n";
            }
         }

         return strm.str();
      }

      void handle_http_request(const HTTP_Parser::Request& request) override {
         if(!m_tls) {
            log_error("Received client data after close");
            return;
         }
         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(!m_tls) {
            log_error("Received client data after close");
            return;
         }
         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(std::move(creds)),
            m_policy(std::move(policy)),
            m_session_manager(std::move(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(const 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 <memory>
18	#include <string>
19	#include <thread>
20	#include <utility>
21	#include <vector>
22
23	#include <botan/internal/os_utils.h>
24	#include <boost/asio.hpp>
25	#include <boost/bind.hpp>
26
27	#include <botan/hex.h>
28	#include <botan/pkcs8.h>
29	#include <botan/rng.h>
30	#include <botan/tls_messages.h>
31	#include <botan/tls_server.h>
32	#include <botan/tls_session_manager_memory.h>
33	#include <botan/version.h>
34	#include <botan/x509cert.h>
35
36	#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
37	#include <botan/tls_session_manager_sqlite.h>
38	#endif
39
40	#include "tls_helpers.h"
41
42	namespace Botan_CLI {
43
44	namespace {
45
46	using boost::asio::ip::tcp;
47
48	template <typename T>
49	boost::asio::io_context& get_io_service(T& s) {	4✔
50	#if BOOST_VERSION >= 107000
51	return static_cast<boost::asio::io_context&>((s).get_executor().context());	8✔
52	#else
53	return s.get_io_service();
54	#endif
55	}
56
57	inline void log_error(const char* msg) {	×
58	std::cout << msg << std::endl;	×
59	}
60
61	inline void log_exception(const char* where, const std::exception& e) {	×
62	std::cout << where << ' ' << e.what() << std::endl;	×
63	}	×
64
65	class ServerStatus {
66	public:
67	ServerStatus(size_t max_clients) : m_max_clients(max_clients), m_clients_serviced(0) {}	1✔
68
69	bool should_exit() const {	4✔
70	if(m_max_clients == 0) {	4✔
71	return false;
72	}
73
74	return clients_serviced() >= m_max_clients;	4✔
75	}
76
77	void client_serviced() { m_clients_serviced++; }	4✔
78
79	size_t clients_serviced() const { return m_clients_serviced.load(); }	4✔
80
81	private:
82	size_t m_max_clients;
83	std::atomic<size_t> m_clients_serviced;
84	};
85
86	/*
87	* This is an incomplete and highly buggy HTTP request parser. It is just
88	* barely sufficient to handle a GET request sent by a browser.
89	*/
90	class HTTP_Parser final {	8✔
91	public:
92	class Request {
93	public:
94	const std::string& verb() const { return m_verb; }	6✔
95
96	const std::string& location() const { return m_location; }	4✔
97
98	const std::map<std::string, std::string>& headers() const { return m_headers; }	4✔
99
100	Request(const std::string& verb,	4✔
101	const std::string& location,
102	const std::map<std::string, std::string>& headers) :	4✔
103	m_verb(verb), m_location(location), m_headers(headers) {}	8✔
104
105	private:
106	std::string m_verb;
107	std::string m_location;
108	std::map<std::string, std::string> m_headers;
109	};
110
111	class Callbacks {
112	public:
113	virtual void handle_http_request(const Request& request) = 0;
114
115	virtual ~Callbacks() = default;	×
116
117	Callbacks() = default;	4✔
118
119	Callbacks(const Callbacks& other) = delete;
120	Callbacks(Callbacks&& other) = delete;
121	Callbacks& operator=(const Callbacks& other) = delete;
122	Callbacks& operator=(Callbacks&&) = delete;
123	};
124
125	HTTP_Parser(Callbacks& cb) : m_cb(cb) {}	4✔
126
127	void consume_input(std::span<const uint8_t> buf) {	4✔
128	m_req_buf.append(reinterpret_cast<const char*>(buf.data()), buf.size());	4✔
129
130	std::istringstream strm(m_req_buf);	4✔
131
132	std::string http_version;	4✔
133	std::string verb;	4✔
134	std::string location;	4✔
135	std::map<std::string, std::string> headers;	4✔
136
137	strm >> verb >> location >> http_version;	4✔
138
139	if(verb.empty() \|\| location.empty()) {	4✔
140	return;	×
141	}
142
143	while(true) {	22✔
144	std::string header_line;	22✔
145	std::getline(strm, header_line);	22✔
146
147	if(header_line == "\r") {	22✔
148	continue;	8✔
149	}
150
151	auto delim = header_line.find(": ");	14✔
152	if(delim == std::string::npos) {	14✔
153	break;
154	}
155
156	const std::string hdr_name = header_line.substr(0, delim);	10✔
157	const std::string hdr_val = header_line.substr(delim + 2, std::string::npos);	10✔
158
159	headers[hdr_name] = hdr_val;	10✔
160
161	if(headers.size() > 1024) {	10✔
162	throw Botan::Invalid_Argument("Too many HTTP headers sent in request");	×
163	}
164	}	28✔
165
166	if(!verb.empty() && !location.empty()) {	4✔
167	Request req(verb, location, headers);	4✔
168	m_cb.handle_http_request(req);	4✔
169	m_req_buf.clear();	4✔
170	}	4✔
171	}	4✔
172
173	private:
174	Callbacks& m_cb;
175	std::string m_req_buf;
176	};
177
178	const size_t READBUF_SIZE = 4096;
179
180	class TLS_Asio_HTTP_Session final : public std::enable_shared_from_this<TLS_Asio_HTTP_Session>,
181	public Botan::TLS::Callbacks,
182	public HTTP_Parser::Callbacks {
183	public:
184	typedef std::shared_ptr<TLS_Asio_HTTP_Session> pointer;
185
186	static pointer create(boost::asio::io_service& io,	4✔
187	const std::shared_ptr<Botan::TLS::Session_Manager>& session_manager,
188	const std::shared_ptr<Botan::Credentials_Manager>& credentials,
189	const std::shared_ptr<Botan::TLS::Policy>& policy) {
190	auto session = std::make_shared<TLS_Asio_HTTP_Session>(io);	4✔
191
192	// Defer the setup of the TLS server to make use of
193	// shared_from_this() which wouldn't work in the c'tor.
194	session->setup(session_manager, credentials, policy);	4✔
195
196	return session;	4✔
197	}	×
198
199	tcp::socket& client_socket() { return m_client_socket; }
200
201	void start() {	4✔
202	m_c2s.resize(READBUF_SIZE);	4✔
203	client_read(boost::system::error_code(), 0); // start read loop	4✔
204	}	4✔
205
206	void stop() {	4✔
207	if(!m_tls) {	4✔
208	// Server is already closed
209	return;
210	}
211
212	m_tls->close();	4✔
213
214	// Need to explicitly destroy the TLS::Server object to break the
215	// circular ownership of shared_from_this() and the shared_ptr of
216	// this kept inside the TLS::Channel.
217	m_tls.reset();	4✔
218	}
219
220	TLS_Asio_HTTP_Session(boost::asio::io_service& io) : m_strand(io), m_client_socket(io), m_rng(cli_make_rng()) {}	12✔
221
222	private:
223	void setup(const std::shared_ptr<Botan::TLS::Session_Manager>& session_manager,	4✔
224	const std::shared_ptr<Botan::Credentials_Manager>& credentials,
225	const std::shared_ptr<Botan::TLS::Policy>& policy) {
226	m_tls = std::make_unique<Botan::TLS::Server>(shared_from_this(), session_manager, credentials, policy, m_rng);	4✔
227	}	4✔
228
229	void client_read(const boost::system::error_code& error, size_t bytes_transferred) {	20✔
230	if(error) {	20✔
231	return stop();	4✔
232	}
233
234	if(!m_tls) {	16✔
235	log_error("Received client data after close");	×
236	return;	×
237	}
238
239	try {	16✔
240	m_tls->received_data(&m_c2s[0], bytes_transferred);	16✔
241	} catch(Botan::Exception& e) {	×
242	log_exception("TLS connection failed", e);	×
243	return stop();	×
244	}	×
245
246	m_client_socket.async_read_some(boost::asio::buffer(&m_c2s[0], m_c2s.size()),	32✔
247	m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::client_read,	32✔
248	shared_from_this(),	32✔
249	boost::asio::placeholders::error,
250	boost::asio::placeholders::bytes_transferred)));
251	}
252
253	void handle_client_write_completion(const boost::system::error_code& error) {	21✔
254	if(error) {	21✔
255	return stop();	×
256	}
257
258	m_s2c.clear();	21✔
259
260	if(m_s2c_pending.empty() && (!m_tls \|\| m_tls->is_closed_for_writing())) {	21✔
261	m_client_socket.close();	4✔
262	}
263	tls_emit_data({}); // initiate another write if needed	21✔
264	}
265
266	std::string tls_server_choose_app_protocol(const std::vector<std::string>& /client_protos/) override {	×
267	return "http/1.1";	×
268	}
269
270	void tls_record_received(uint64_t /rec_no/, std::span<const uint8_t> buf) override {	4✔
271	if(!m_http_parser) {	4✔
272	m_http_parser = std::make_unique<HTTP_Parser>(*this);	4✔
273	}
274
275	m_http_parser->consume_input(buf);	4✔
276	}	4✔
277
278	std::string summarize_request(const HTTP_Parser::Request& request) {	2✔
279	std::ostringstream strm;	2✔
280
281	strm << "Client " << client_socket().remote_endpoint().address().to_string() << " requested " << request.verb()	4✔
282	<< " " << request.location() << "\n";	4✔
283
284	if(request.headers().empty() == false) {	2✔
285	strm << "Client HTTP headers:\n";	2✔
286	for(const auto& kv : request.headers()) {	6✔
287	strm << " " << kv.first << ": " << kv.second << "\n";	4✔
288	}
289	}
290
291	return strm.str();	4✔
292	}	2✔
293
294	void handle_http_request(const HTTP_Parser::Request& request) override {	4✔
295	if(!m_tls) {	4✔
296	log_error("Received client data after close");	×
297	return;	×
298	}
299	std::ostringstream response;	4✔
300	if(request.verb() == "GET") {	4✔
301	if(request.location() == "/" \|\| request.location() == "/status") {	2✔
302	const std::string http_summary = summarize_request(request);	2✔
303
304	const std::string report = m_connection_summary + m_session_summary + m_chello_summary + http_summary;	4✔
305
306	response << "HTTP/1.0 200 OK\r\n";	2✔
307	response << "Server: " << Botan::version_string() << "\r\n";	4✔
308	response << "Content-Type: text/plain\r\n";	2✔
309	response << "Content-Length: " << report.size() << "\r\n";	2✔
310	response << "\r\n";	2✔
311
312	response << report;	2✔
313	} else {	4✔
314	response << "HTTP/1.0 404 Not Found\r\n\r\n";	×
315	}
316	} else {
317	response << "HTTP/1.0 405 Method Not Allowed\r\n\r\n";	2✔
318	}
319
320	const std::string response_str = response.str();	4✔
321	m_tls->send(response_str);	4✔
322	m_tls->close();	4✔
323	}	4✔
324
325	void tls_emit_data(std::span<const uint8_t> buf) override {	49✔
326	if(!buf.empty()) {	49✔
327	m_s2c_pending.insert(m_s2c_pending.end(), buf.begin(), buf.end());	28✔
328	}
329
330	// no write now active and we still have output pending
331	if(m_s2c.empty() && !m_s2c_pending.empty()) {	49✔
332	std::swap(m_s2c_pending, m_s2c);	21✔
333
334	boost::asio::async_write(m_client_socket,	21✔
335	boost::asio::buffer(&m_s2c[0], m_s2c.size()),	21✔
336	m_strand.wrap(boost::bind(&TLS_Asio_HTTP_Session::handle_client_write_completion,	42✔
337	shared_from_this(),	42✔
338	boost::asio::placeholders::error)));
339	}
340	}	49✔
341
342	void tls_session_activated() override {	4✔
343	std::ostringstream strm;	4✔
344
345	strm << "TLS negotiation with " << Botan::version_string() << " test server\n\n";	8✔
346
347	m_connection_summary = strm.str();	4✔
348	}	4✔
349
350	void tls_session_established(const Botan::TLS::Session_Summary& session) override {	4✔
351	std::ostringstream strm;	4✔
352
353	strm << "Version: " << session.version().to_string() << "\n";	8✔
354	strm << "Ciphersuite: " << session.ciphersuite().to_string() << "\n";	8✔
355	if(const auto& session_id = session.session_id(); !session_id.empty()) {	4✔
356	strm << "SessionID: " << Botan::hex_encode(session_id.get()) << "\n";	8✔
357	}
358	if(!session.server_info().hostname().empty()) {	8✔
359	strm << "SNI: " << session.server_info().hostname() << "\n";	12✔
360	}
361
362	m_session_summary = strm.str();	4✔
363	}	4✔
364
365	void tls_inspect_handshake_msg(const Botan::TLS::Handshake_Message& message) override {	34✔
366	if(message.type() == Botan::TLS::Handshake_Type::ClientHello) {	34✔
367	const Botan::TLS::Client_Hello& client_hello = dynamic_cast<const Botan::TLS::Client_Hello&>(message);	6✔
368
369	std::ostringstream strm;	6✔
370
371	strm << "Client random: " << Botan::hex_encode(client_hello.random()) << "\n";	6✔
372
373	strm << "Client offered following ciphersuites:\n";	6✔
374	for(uint16_t suite_id : client_hello.ciphersuites()) {	74✔
375	const auto ciphersuite = Botan::TLS::Ciphersuite::by_id(suite_id);	68✔
376
377	strm << " - 0x" << std::hex << std::setfill('0') << std::setw(4) << suite_id << std::dec	68✔
378	<< std::setfill(' ') << std::setw(0) << " ";	68✔
379
380	if(ciphersuite && ciphersuite->valid()) {	68✔
381	strm << ciphersuite->to_string() << "\n";	186✔
382	} else if(suite_id == 0x00FF) {	6✔
383	strm << "Renegotiation SCSV\n";	6✔
384	} else {
385	strm << "Unknown ciphersuite\n";	×
386	}
387	}
388
389	m_chello_summary = strm.str();	6✔
390	}	6✔
391	}	34✔
392
393	void tls_alert(Botan::TLS::Alert alert) override {	×
394	if(!m_tls) {	×
395	log_error("Received client data after close");	×
396	return;	×
397	}
398	if(alert.type() == Botan::TLS::Alert::CloseNotify) {	×
399	m_tls->close();	×
400	} else {
401	std::cout << "Alert " << alert.type_string() << std::endl;	×
402	}
403	}
404
405	boost::asio::io_service::strand m_strand;
406
407	tcp::socket m_client_socket;
408
409	std::shared_ptr<Botan::RandomNumberGenerator> m_rng;
410	std::unique_ptr<Botan::TLS::Server> m_tls;
411	std::string m_chello_summary;
412	std::string m_connection_summary;
413	std::string m_session_summary;
414	std::unique_ptr<HTTP_Parser> m_http_parser;
415
416	std::vector<uint8_t> m_c2s;
417	std::vector<uint8_t> m_s2c;
418	std::vector<uint8_t> m_s2c_pending;
419	};
420
421	class TLS_Asio_HTTP_Server final {
422	public:
423	typedef TLS_Asio_HTTP_Session session;
424
425	TLS_Asio_HTTP_Server(boost::asio::io_service& io,	1✔
426	unsigned short port,
427	std::shared_ptr<Botan::Credentials_Manager> creds,
428	std::shared_ptr<Botan::TLS::Policy> policy,
429	std::shared_ptr<Botan::TLS::Session_Manager> session_mgr,
430	size_t max_clients) :	1✔
431	m_acceptor(io, tcp::endpoint(tcp::v4(), port)),	1✔
432	m_creds(std::move(creds)),	1✔
433	m_policy(std::move(policy)),	1✔
434	m_session_manager(std::move(session_mgr)),	1✔
435	m_status(max_clients) {	1✔
436	serve_one_session();	1✔
437	}	1✔
438
439	private:
440	void serve_one_session() {	4✔
441	auto new_session = session::create(get_io_service(m_acceptor), m_session_manager, m_creds, m_policy);	4✔
442
443	m_acceptor.async_accept(	8✔
444	new_session->client_socket(),	4✔
445	boost::bind(&TLS_Asio_HTTP_Server::handle_accept, this, new_session, boost::asio::placeholders::error));	12✔
446	}	4✔
447
448	void handle_accept(const session::pointer& new_session, const boost::system::error_code& error) {	4✔
449	if(!error) {	4✔
450	new_session->start();	4✔
451	m_status.client_serviced();	4✔
452
453	if(!m_status.should_exit()) {	4✔
454	serve_one_session();	3✔
455	}
456	}
457	}	4✔
458
459	tcp::acceptor m_acceptor;
460
461	std::shared_ptr<Botan::Credentials_Manager> m_creds;
462	std::shared_ptr<Botan::TLS::Policy> m_policy;
463	std::shared_ptr<Botan::TLS::Session_Manager> m_session_manager;
464	ServerStatus m_status;
465	};
466
467	} // namespace
468
469	class TLS_HTTP_Server final : public Command {
470	public:
471	TLS_HTTP_Server() :	2✔
472	Command(
473	"tls_http_server server_cert server_key "
474	"--port=443 --policy=default --threads=0 --max-clients=0 "
475	"--session-db= --session-db-pass=") {}	4✔
476
477	std::string group() const override { return "tls"; }	1✔
478
479	std::string description() const override { return "Provides a simple HTTP server"; }	1✔
480
481	size_t thread_count() const {	1✔
482	if(size_t t = get_arg_sz("threads")) {	1✔
483	return t;
484	}
485	if(size_t t = Botan::OS::get_cpu_available()) {	1✔
486	return t;	1✔
487	}
488	return 2;
489	}
490
491	void go() override {	1✔
492	const uint16_t listen_port = get_arg_u16("port");	1✔
493
494	const std::string server_crt = get_arg("server_cert");	1✔
495	const std::string server_key = get_arg("server_key");	1✔
496
497	const size_t num_threads = thread_count();	1✔
498	const size_t max_clients = get_arg_sz("max-clients");	1✔
499
500	auto creds = std::make_shared<Basic_Credentials_Manager>(server_crt, server_key);	1✔
501
502	auto policy = load_tls_policy(get_arg("policy"));	2✔
503
504	std::shared_ptr<Botan::TLS::Session_Manager> session_mgr;	1✔
505
506	const std::string sessions_db = get_arg("session-db");	1✔
507
508	if(!sessions_db.empty()) {	1✔
509	#if defined(BOTAN_HAS_TLS_SQLITE3_SESSION_MANAGER)
510	const std::string sessions_passphrase = get_passphrase_arg("Session DB passphrase", "session-db-pass");	×
511	session_mgr.reset(	×
512	new Botan::TLS::Session_Manager_SQLite(sessions_passphrase, rng_as_shared(), sessions_db));	×
513	#else
514	throw CLI_Error_Unsupported("Sqlite3 support not available");
515	#endif
516	}	×
517
518	if(!session_mgr) {	1✔
519	session_mgr.reset(new Botan::TLS::Session_Manager_In_Memory(rng_as_shared()));	2✔
520	}
521
522	boost::asio::io_service io;	1✔
523
524	TLS_Asio_HTTP_Server server(io, listen_port, creds, policy, session_mgr, max_clients);	2✔
525
526	std::vector<std::shared_ptr<std::thread>> threads;	1✔
527
528	// run forever... first thread is main calling io.run below
529	for(size_t i = 2; i <= num_threads; ++i) {	2✔
530	threads.push_back(std::make_shared<std::thread>([&io]() { io.run(); }));	2✔
531	}
532
533	io.run();	1✔
534
535	for(size_t i = 0; i < threads.size(); ++i) {	2✔
536	threads[i]->join();	1✔
537	}
538	}	6✔
539	};
540
541	BOTAN_REGISTER_COMMAND("tls_http_server", TLS_HTTP_Server);	2✔
542
543	} // namespace Botan_CLI
544
545	#endif

randombit / botan / 5655173672

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