2 * InspIRCd -- Internet Relay Chat Daemon
4 * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
5 * Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
6 * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
7 * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
8 * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
10 * This file is part of InspIRCd. InspIRCd is free software: you can
11 * redistribute it and/or modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation, version 2.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
16 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <gnutls/gnutls.h>
27 #include <gnutls/x509.h>
28 #include "modules/ssl.h"
29 #include "modules/cap.h"
32 # pragma comment(lib, "libgnutls.lib")
33 # pragma comment(lib, "libgcrypt.lib")
34 # pragma comment(lib, "libgpg-error.lib")
35 # pragma comment(lib, "user32.lib")
36 # pragma comment(lib, "advapi32.lib")
37 # pragma comment(lib, "libgcc.lib")
38 # pragma comment(lib, "libmingwex.lib")
39 # pragma comment(lib, "gdi32.lib")
42 /* $ModDesc: Provides SSL support for clients */
43 /* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") exec("libgcrypt-config --cflags") */
44 /* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") exec("libgcrypt-config --libs") */
47 // These don't exist in older GnuTLS versions
48 #if ((GNUTLS_VERSION_MAJOR > 2) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR > 1) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR == 1 && GNUTLS_VERSION_MICRO >= 7))
49 #define GNUTLS_NEW_PRIO_API
52 #if(GNUTLS_VERSION_MAJOR < 2)
53 typedef gnutls_certificate_credentials_t gnutls_certificate_credentials;
54 typedef gnutls_dh_params_t gnutls_dh_params;
57 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
59 static std::vector<gnutls_x509_crt_t> x509_certs;
60 static gnutls_x509_privkey_t x509_key;
61 #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
62 static int cert_callback (gnutls_session_t session, const gnutls_datum_t * req_ca_rdn, int nreqs,
63 const gnutls_pk_algorithm_t * sign_algos, int sign_algos_length, gnutls_retr_st * st) {
65 st->type = GNUTLS_CRT_X509;
67 static int cert_callback (gnutls_session_t session, const gnutls_datum_t * req_ca_rdn, int nreqs,
68 const gnutls_pk_algorithm_t * sign_algos, int sign_algos_length, gnutls_retr2_st * st) {
69 st->cert_type = GNUTLS_CRT_X509;
70 st->key_type = GNUTLS_PRIVKEY_X509;
72 st->ncerts = x509_certs.size();
73 st->cert.x509 = &x509_certs[0];
74 st->key.x509 = x509_key;
80 static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t user_wrap, void* buffer, size_t size)
82 StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
83 if (user->GetEventMask() & FD_READ_WILL_BLOCK)
88 int rv = ServerInstance->SE->Recv(user, reinterpret_cast<char *>(buffer), size, 0);
91 /* On Windows we need to set errno for gnutls */
92 if (SocketEngine::IgnoreError())
96 ServerInstance->SE->ChangeEventMask(user, FD_READ_WILL_BLOCK);
100 static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t user_wrap, const void* buffer, size_t size)
102 StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
103 if (user->GetEventMask() & FD_WRITE_WILL_BLOCK)
108 int rv = ServerInstance->SE->Send(user, reinterpret_cast<const char *>(buffer), size, 0);
111 /* On Windows we need to set errno for gnutls */
112 if (SocketEngine::IgnoreError())
116 ServerInstance->SE->ChangeEventMask(user, FD_WRITE_WILL_BLOCK);
120 class RandGen : public HandlerBase2<void, char*, size_t>
124 void Call(char* buffer, size_t len)
126 gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
130 /** Represents an SSL user's extra data
135 gnutls_session_t sess;
137 reference<ssl_cert> cert;
138 issl_session() : sess(NULL) {}
141 class CommandStartTLS : public SplitCommand
145 CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS")
148 works_before_reg = true;
151 CmdResult HandleLocal(const std::vector<std::string> ¶meters, LocalUser *user)
155 user->WriteNumeric(691, "%s :STARTTLS is not enabled", user->nick.c_str());
159 if (user->registered == REG_ALL)
161 user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration is complete", user->nick.c_str());
165 if (!user->eh.GetIOHook())
167 user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
168 /* We need to flush the write buffer prior to adding the IOHook,
169 * otherwise we'll be sending this line inside the SSL session - which
170 * won't start its handshake until the client gets this line. Currently,
171 * we assume the write will not block here; this is usually safe, as
172 * STARTTLS is sent very early on in the registration phase, where the
173 * user hasn't built up much sendq. Handling a blocked write here would
177 user->eh.AddIOHook(creator);
178 creator->OnStreamSocketAccept(&user->eh, NULL, NULL);
181 user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
188 class ModuleSSLGnuTLS : public Module
190 issl_session* sessions;
192 gnutls_certificate_credentials_t x509_cred;
193 gnutls_dh_params_t dh_params;
194 gnutls_digest_algorithm_t hash;
195 #ifdef GNUTLS_NEW_PRIO_API
196 gnutls_priority_t priority;
199 std::string sslports;
206 CommandStartTLS starttls;
208 GenericCap capHandler;
209 ServiceProvider iohook;
211 inline static const char* UnknownIfNULL(const char* str)
213 return str ? str : "UNKNOWN";
218 : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK)
220 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
222 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
224 gnutls_global_init(); // This must be called once in the program
225 gnutls_x509_privkey_init(&x509_key);
227 #ifdef GNUTLS_NEW_PRIO_API
228 // Init this here so it's always initialized, avoids an extra boolean
229 gnutls_priority_init(&priority, "NORMAL", NULL);
236 void init() CXX11_OVERRIDE
238 // Needs the flag as it ignores a plain /rehash
239 OnModuleRehash(NULL,"ssl");
241 ServerInstance->GenRandom = &randhandler;
243 // Void return, guess we assume success
244 gnutls_certificate_set_dh_params(x509_cred, dh_params);
245 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect,
246 I_OnEvent, I_OnHookIO };
247 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
249 ServerInstance->Modules->AddService(iohook);
250 ServerInstance->Modules->AddService(starttls);
253 void OnRehash(User* user) CXX11_OVERRIDE
257 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
258 starttls.enabled = Conf->getBool("starttls", true);
260 if (Conf->getBool("showports", true))
262 sslports = Conf->getString("advertisedports");
263 if (!sslports.empty())
266 for (size_t i = 0; i < ServerInstance->ports.size(); i++)
268 ListenSocket* port = ServerInstance->ports[i];
269 if (port->bind_tag->getString("ssl") != "gnutls")
272 const std::string& portid = port->bind_desc;
273 ServerInstance->Logs->Log("m_ssl_gnutls", LOG_DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
275 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
278 * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
279 * the IP:port in ISUPPORT.
281 * We used to advertise all ports seperated by a ';' char that matched the above criteria,
282 * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
283 * To solve this by default we now only display the first IP:port found and let the user
284 * configure the exact value for the 005 token, if necessary.
293 void OnModuleRehash(User* user, const std::string ¶m) CXX11_OVERRIDE
299 std::string certfile;
304 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
306 cafile = Conf->getString("cafile", CONFIG_PATH "/ca.pem");
307 crlfile = Conf->getString("crlfile", CONFIG_PATH "/crl.pem");
308 certfile = Conf->getString("certfile", CONFIG_PATH "/cert.pem");
309 keyfile = Conf->getString("keyfile", CONFIG_PATH "/key.pem");
310 dh_bits = Conf->getInt("dhbits");
311 std::string hashname = Conf->getString("hash", "md5");
313 // The GnuTLS manual states that the gnutls_set_default_priority()
314 // call we used previously when initializing the session is the same
315 // as setting the "NORMAL" priority string.
316 // Thus if the setting below is not in the config we will behave exactly
317 // the same as before, when the priority setting wasn't available.
318 std::string priorities = Conf->getString("priority", "NORMAL");
320 if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
323 if (hashname == "md5")
324 hash = GNUTLS_DIG_MD5;
325 else if (hashname == "sha1")
326 hash = GNUTLS_DIG_SHA1;
328 throw ModuleException("Unknown hash type " + hashname);
335 gnutls_dh_params_deinit(dh_params);
342 // Deallocate the old credentials
343 gnutls_certificate_free_credentials(x509_cred);
345 for(unsigned int i=0; i < x509_certs.size(); i++)
346 gnutls_x509_crt_deinit(x509_certs[i]);
350 ret = gnutls_certificate_allocate_credentials(&x509_cred);
351 cred_alloc = (ret >= 0);
353 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret));
355 if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
356 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEBUG, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret));
358 if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
359 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEBUG, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret));
363 reader.LoadFile(certfile);
364 std::string cert_string = reader.Contents();
365 gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), static_cast<unsigned int>(cert_string.length()) };
367 reader.LoadFile(keyfile);
368 std::string key_string = reader.Contents();
369 gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), static_cast<unsigned int>(key_string.length()) };
371 // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
372 unsigned int certcount = 3;
373 x509_certs.resize(certcount);
374 ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
375 if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
377 // the buffer wasn't big enough to hold all certs but gnutls updated certcount to the number of available certs, try again with a bigger buffer
378 x509_certs.resize(certcount);
379 ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
384 // clear the vector so we won't call gnutls_x509_crt_deinit() on the (uninited) certs later
386 throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + ((ret < 0) ? (std::string(gnutls_strerror(ret))) : "No certs could be read"));
388 x509_certs.resize(ret);
390 if((ret = gnutls_x509_privkey_import(x509_key, &key_datum, GNUTLS_X509_FMT_PEM)) < 0)
391 throw ModuleException("Unable to load GnuTLS server private key (" + keyfile + "): " + std::string(gnutls_strerror(ret)));
393 if((ret = gnutls_certificate_set_x509_key(x509_cred, &x509_certs[0], certcount, x509_key)) < 0)
394 throw ModuleException("Unable to set GnuTLS cert/key pair: " + std::string(gnutls_strerror(ret)));
396 #ifdef GNUTLS_NEW_PRIO_API
397 // It's safe to call this every time as we cannot have this uninitialized, see constructor and below.
398 gnutls_priority_deinit(priority);
400 // Try to set the priorities for ciphers, kex methods etc. to the user supplied string
401 // If the user did not supply anything then the string is already set to "NORMAL"
402 const char* priocstr = priorities.c_str();
403 const char* prioerror;
405 if ((ret = gnutls_priority_init(&priority, priocstr, &prioerror)) < 0)
407 // gnutls did not understand the user supplied string, log and fall back to the default priorities
408 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEFAULT, "m_ssl_gnutls.so: Failed to set priorities to \"%s\": %s Syntax error at position %u, falling back to default (NORMAL)", priorities.c_str(), gnutls_strerror(ret), (unsigned int) (prioerror - priocstr));
409 gnutls_priority_init(&priority, "NORMAL", NULL);
413 if (priorities != "NORMAL")
414 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEFAULT, "m_ssl_gnutls.so: You've set <gnutls:priority> to a value other than the default, but this is only supported with GnuTLS v2.1.7 or newer. Your GnuTLS version is older than that so the option will have no effect.");
417 #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
418 gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
420 gnutls_certificate_set_retrieve_function (x509_cred, cert_callback);
422 ret = gnutls_dh_params_init(&dh_params);
423 dh_alloc = (ret >= 0);
426 ServerInstance->Logs->Log("m_ssl_gnutls", LOG_DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
430 std::string dhfile = Conf->getString("dhfile");
433 // Try to load DH params from file
434 reader.LoadFile(dhfile);
435 std::string dhstring = reader.Contents();
436 gnutls_datum_t dh_datum = { (unsigned char*)dhstring.data(), static_cast<unsigned int>(dhstring.length()) };
438 if ((ret = gnutls_dh_params_import_pkcs3(dh_params, &dh_datum, GNUTLS_X509_FMT_PEM)) < 0)
440 // File unreadable or GnuTLS was unhappy with the contents, generate the DH primes now
441 ServerInstance->Logs->Log("m_ssl_gnutls", LOG_DEFAULT, "m_ssl_gnutls.so: Generating DH parameters because I failed to load them from file '%s': %s", dhfile.c_str(), gnutls_strerror(ret));
451 void GenerateDHParams()
453 // Generate Diffie Hellman parameters - for use with DHE
454 // kx algorithms. These should be discarded and regenerated
455 // once a day, once a week or once a month. Depending on the
456 // security requirements.
463 if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
464 ServerInstance->Logs->Log("m_ssl_gnutls",LOG_DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
469 for(unsigned int i=0; i < x509_certs.size(); i++)
470 gnutls_x509_crt_deinit(x509_certs[i]);
472 gnutls_x509_privkey_deinit(x509_key);
473 #ifdef GNUTLS_NEW_PRIO_API
474 gnutls_priority_deinit(priority);
478 gnutls_dh_params_deinit(dh_params);
480 gnutls_certificate_free_credentials(x509_cred);
482 gnutls_global_deinit();
484 ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
487 void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
489 if(target_type == TYPE_USER)
491 LocalUser* user = IS_LOCAL(static_cast<User*>(item));
493 if (user && user->eh.GetIOHook() == this)
495 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
496 // Potentially there could be multiple SSL modules loaded at once on different ports.
497 ServerInstance->Users->QuitUser(user, "SSL module unloading");
502 Version GetVersion() CXX11_OVERRIDE
504 return Version("Provides SSL support for clients", VF_VENDOR);
507 void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
509 if (!sslports.empty())
510 tokens["SSL"] = sslports;
511 if (starttls.enabled)
515 void OnHookIO(StreamSocket* user, ListenSocket* lsb) CXX11_OVERRIDE
517 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls")
519 /* Hook the user with our module */
520 user->AddIOHook(this);
524 void OnRequest(Request& request) CXX11_OVERRIDE
526 if (strcmp("GET_SSL_CERT", request.id) == 0)
528 SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
529 int fd = req.sock->GetFd();
530 issl_session* session = &sessions[fd];
532 req.cert = session->cert;
536 void InitSession(StreamSocket* user, bool me_server)
538 issl_session* session = &sessions[user->GetFd()];
540 gnutls_init(&session->sess, me_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
542 #ifdef GNUTLS_NEW_PRIO_API
543 gnutls_priority_set(session->sess, priority);
545 gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
546 gnutls_dh_set_prime_bits(session->sess, dh_bits);
547 gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
548 gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
549 gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
552 gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
554 Handshake(session, user);
557 void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
559 issl_session* session = &sessions[user->GetFd()];
561 /* For STARTTLS: Don't try and init a session on a socket that already has a session */
565 InitSession(user, true);
568 void OnStreamSocketConnect(StreamSocket* user) CXX11_OVERRIDE
570 InitSession(user, false);
573 void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
575 CloseSession(&sessions[user->GetFd()]);
578 int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
580 issl_session* session = &sessions[user->GetFd()];
584 CloseSession(session);
585 user->SetError("No SSL session");
589 if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE)
591 // The handshake isn't finished, try to finish it.
593 if(!Handshake(session, user))
595 if (session->status != ISSL_CLOSING)
601 // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
603 if (session->status == ISSL_HANDSHAKEN)
605 char* buffer = ServerInstance->GetReadBuffer();
606 size_t bufsiz = ServerInstance->Config->NetBufferSize;
607 int ret = gnutls_record_recv(session->sess, buffer, bufsiz);
610 recvq.append(buffer, ret);
613 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
619 user->SetError("Connection closed");
620 CloseSession(session);
625 user->SetError(gnutls_strerror(ret));
626 CloseSession(session);
630 else if (session->status == ISSL_CLOSING)
636 int OnStreamSocketWrite(StreamSocket* user, std::string& sendq) CXX11_OVERRIDE
638 issl_session* session = &sessions[user->GetFd()];
642 CloseSession(session);
643 user->SetError("No SSL session");
647 if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ)
649 // The handshake isn't finished, try to finish it.
650 Handshake(session, user);
651 if (session->status != ISSL_CLOSING)
658 if (session->status == ISSL_HANDSHAKEN)
660 ret = gnutls_record_send(session->sess, sendq.data(), sendq.length());
662 if (ret == (int)sendq.length())
664 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE);
669 sendq = sendq.substr(ret);
670 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
673 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
675 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
680 user->SetError(gnutls_strerror(ret));
681 CloseSession(session);
689 bool Handshake(issl_session* session, StreamSocket* user)
691 int ret = gnutls_handshake(session->sess);
695 if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
697 // Handshake needs resuming later, read() or write() would have blocked.
699 if(gnutls_record_get_direction(session->sess) == 0)
701 // gnutls_handshake() wants to read() again.
702 session->status = ISSL_HANDSHAKING_READ;
703 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
707 // gnutls_handshake() wants to write() again.
708 session->status = ISSL_HANDSHAKING_WRITE;
709 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
714 user->SetError("Handshake Failed - " + std::string(gnutls_strerror(ret)));
715 CloseSession(session);
716 session->status = ISSL_CLOSING;
723 // Change the seesion state
724 session->status = ISSL_HANDSHAKEN;
726 VerifyCertificate(session,user);
728 // Finish writing, if any left
729 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
735 void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
737 if (user->eh.GetIOHook() == this)
739 if (sessions[user->eh.GetFd()].sess)
741 const gnutls_session_t& sess = sessions[user->eh.GetFd()].sess;
742 std::string cipher = UnknownIfNULL(gnutls_kx_get_name(gnutls_kx_get(sess)));
743 cipher.append("-").append(UnknownIfNULL(gnutls_cipher_get_name(gnutls_cipher_get(sess)))).append("-");
744 cipher.append(UnknownIfNULL(gnutls_mac_get_name(gnutls_mac_get(sess))));
746 ssl_cert* cert = sessions[user->eh.GetFd()].cert;
747 if (cert->fingerprint.empty())
748 user->WriteNotice("*** You are connected using SSL cipher '" + cipher + "'");
750 user->WriteNotice("*** You are connected using SSL cipher '" + cipher +
751 "' and your SSL fingerprint is " + cert->fingerprint);
756 void CloseSession(issl_session* session)
760 gnutls_bye(session->sess, GNUTLS_SHUT_WR);
761 gnutls_deinit(session->sess);
763 session->sess = NULL;
764 session->cert = NULL;
765 session->status = ISSL_NONE;
768 void VerifyCertificate(issl_session* session, StreamSocket* user)
770 if (!session->sess || !user)
774 const gnutls_datum_t* cert_list;
776 unsigned int cert_list_size;
777 gnutls_x509_crt_t cert;
779 unsigned char digest[MAXBUF];
780 size_t digest_size = sizeof(digest);
781 size_t name_size = sizeof(name);
782 ssl_cert* certinfo = new ssl_cert;
783 session->cert = certinfo;
785 /* This verification function uses the trusted CAs in the credentials
786 * structure. So you must have installed one or more CA certificates.
788 ret = gnutls_certificate_verify_peers2(session->sess, &status);
792 certinfo->error = std::string(gnutls_strerror(ret));
796 certinfo->invalid = (status & GNUTLS_CERT_INVALID);
797 certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
798 certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
799 certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
801 /* Up to here the process is the same for X.509 certificates and
802 * OpenPGP keys. From now on X.509 certificates are assumed. This can
803 * be easily extended to work with openpgp keys as well.
805 if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
807 certinfo->error = "No X509 keys sent";
811 ret = gnutls_x509_crt_init(&cert);
814 certinfo->error = gnutls_strerror(ret);
819 cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
820 if (cert_list == NULL)
822 certinfo->error = "No certificate was found";
823 goto info_done_dealloc;
826 /* This is not a real world example, since we only check the first
827 * certificate in the given chain.
830 ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
833 certinfo->error = gnutls_strerror(ret);
834 goto info_done_dealloc;
837 gnutls_x509_crt_get_dn(cert, name, &name_size);
840 gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
841 certinfo->issuer = name;
843 if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
845 certinfo->error = gnutls_strerror(ret);
849 certinfo->fingerprint = irc::hex(digest, digest_size);
852 /* Beware here we do not check for errors.
854 if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
856 certinfo->error = "Not activated, or expired certificate";
860 gnutls_x509_crt_deinit(cert);
863 void OnEvent(Event& ev) CXX11_OVERRIDE
865 if (starttls.enabled)
866 capHandler.HandleEvent(ev);
870 MODULE_INIT(ModuleSSLGnuTLS)