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>
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);
90 ServerInstance->SE->ChangeEventMask(user, FD_READ_WILL_BLOCK);
94 static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t user_wrap, const void* buffer, size_t size)
96 StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
97 if (user->GetEventMask() & FD_WRITE_WILL_BLOCK)
102 int rv = ServerInstance->SE->Send(user, reinterpret_cast<const char *>(buffer), size, 0);
104 ServerInstance->SE->ChangeEventMask(user, FD_WRITE_WILL_BLOCK);
108 class RandGen : public HandlerBase2<void, char*, size_t>
112 void Call(char* buffer, size_t len)
114 gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
118 /** Represents an SSL user's extra data
123 gnutls_session_t sess;
125 reference<ssl_cert> cert;
126 issl_session() : sess(NULL) {}
129 class CommandStartTLS : public SplitCommand
133 CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS")
136 works_before_reg = true;
139 CmdResult HandleLocal(const std::vector<std::string> ¶meters, LocalUser *user)
143 user->WriteNumeric(691, "%s :STARTTLS is not enabled", user->nick.c_str());
147 if (user->registered == REG_ALL)
149 user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration is complete", user->nick.c_str());
153 if (!user->eh.GetIOHook())
155 user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
156 /* We need to flush the write buffer prior to adding the IOHook,
157 * otherwise we'll be sending this line inside the SSL session - which
158 * won't start its handshake until the client gets this line. Currently,
159 * we assume the write will not block here; this is usually safe, as
160 * STARTTLS is sent very early on in the registration phase, where the
161 * user hasn't built up much sendq. Handling a blocked write here would
165 user->eh.AddIOHook(creator);
166 creator->OnStreamSocketAccept(&user->eh, NULL, NULL);
169 user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
176 class ModuleSSLGnuTLS : public Module
178 issl_session* sessions;
180 gnutls_certificate_credentials_t x509_cred;
181 gnutls_dh_params_t dh_params;
182 gnutls_digest_algorithm_t hash;
183 #ifdef GNUTLS_NEW_PRIO_API
184 gnutls_priority_t priority;
187 std::string sslports;
194 CommandStartTLS starttls;
196 GenericCap capHandler;
197 ServiceProvider iohook;
199 inline static const char* UnknownIfNULL(const char* str)
201 return str ? str : "UNKNOWN";
207 : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK)
209 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
211 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
213 gnutls_global_init(); // This must be called once in the program
214 gnutls_x509_privkey_init(&x509_key);
216 #ifdef GNUTLS_NEW_PRIO_API
217 // Init this here so it's always initialized, avoids an extra boolean
218 gnutls_priority_init(&priority, "NORMAL", NULL);
227 // Needs the flag as it ignores a plain /rehash
228 OnModuleRehash(NULL,"ssl");
230 ServerInstance->GenRandom = &randhandler;
232 // Void return, guess we assume success
233 gnutls_certificate_set_dh_params(x509_cred, dh_params);
234 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect,
235 I_OnEvent, I_OnHookIO };
236 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
238 ServerInstance->Modules->AddService(iohook);
239 ServerInstance->Modules->AddService(starttls);
242 void OnRehash(User* user)
246 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
247 starttls.enabled = Conf->getBool("starttls", true);
249 if (Conf->getBool("showports", true))
251 sslports = Conf->getString("advertisedports");
252 if (!sslports.empty())
255 for (size_t i = 0; i < ServerInstance->ports.size(); i++)
257 ListenSocket* port = ServerInstance->ports[i];
258 if (port->bind_tag->getString("ssl") != "gnutls")
261 const std::string& portid = port->bind_desc;
262 ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
264 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
267 * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
268 * the IP:port in ISUPPORT.
270 * We used to advertise all ports seperated by a ';' char that matched the above criteria,
271 * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
272 * To solve this by default we now only display the first IP:port found and let the user
273 * configure the exact value for the 005 token, if necessary.
282 void OnModuleRehash(User* user, const std::string ¶m)
288 std::string certfile;
293 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
295 cafile = Conf->getString("cafile", CONFIG_PATH "/ca.pem");
296 crlfile = Conf->getString("crlfile", CONFIG_PATH "/crl.pem");
297 certfile = Conf->getString("certfile", CONFIG_PATH "/cert.pem");
298 keyfile = Conf->getString("keyfile", CONFIG_PATH "/key.pem");
299 dh_bits = Conf->getInt("dhbits");
300 std::string hashname = Conf->getString("hash", "md5");
302 // The GnuTLS manual states that the gnutls_set_default_priority()
303 // call we used previously when initializing the session is the same
304 // as setting the "NORMAL" priority string.
305 // Thus if the setting below is not in the config we will behave exactly
306 // the same as before, when the priority setting wasn't available.
307 std::string priorities = Conf->getString("priority", "NORMAL");
309 if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
312 if (hashname == "md5")
313 hash = GNUTLS_DIG_MD5;
314 else if (hashname == "sha1")
315 hash = GNUTLS_DIG_SHA1;
317 throw ModuleException("Unknown hash type " + hashname);
324 gnutls_dh_params_deinit(dh_params);
330 // Deallocate the old credentials
331 gnutls_certificate_free_credentials(x509_cred);
333 for(unsigned int i=0; i < x509_certs.size(); i++)
334 gnutls_x509_crt_deinit(x509_certs[i]);
338 ret = gnutls_certificate_allocate_credentials(&x509_cred);
339 cred_alloc = (ret >= 0);
341 ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret));
343 if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
344 ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret));
346 if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
347 ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret));
351 reader.LoadFile(certfile);
352 std::string cert_string = reader.Contents();
353 gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), static_cast<unsigned int>(cert_string.length()) };
355 reader.LoadFile(keyfile);
356 std::string key_string = reader.Contents();
357 gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), static_cast<unsigned int>(key_string.length()) };
359 // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
360 unsigned int certcount = 3;
361 x509_certs.resize(certcount);
362 ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
363 if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
365 // 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
366 x509_certs.resize(certcount);
367 ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
372 // clear the vector so we won't call gnutls_x509_crt_deinit() on the (uninited) certs later
374 throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + ((ret < 0) ? (std::string(gnutls_strerror(ret))) : "No certs could be read"));
376 x509_certs.resize(ret);
378 if((ret = gnutls_x509_privkey_import(x509_key, &key_datum, GNUTLS_X509_FMT_PEM)) < 0)
379 throw ModuleException("Unable to load GnuTLS server private key (" + keyfile + "): " + std::string(gnutls_strerror(ret)));
381 if((ret = gnutls_certificate_set_x509_key(x509_cred, &x509_certs[0], certcount, x509_key)) < 0)
382 throw ModuleException("Unable to set GnuTLS cert/key pair: " + std::string(gnutls_strerror(ret)));
384 #ifdef GNUTLS_NEW_PRIO_API
385 // It's safe to call this every time as we cannot have this uninitialized, see constructor and below.
386 gnutls_priority_deinit(priority);
388 // Try to set the priorities for ciphers, kex methods etc. to the user supplied string
389 // If the user did not supply anything then the string is already set to "NORMAL"
390 const char* priocstr = priorities.c_str();
391 const char* prioerror;
393 if ((ret = gnutls_priority_init(&priority, priocstr, &prioerror)) < 0)
395 // gnutls did not understand the user supplied string, log and fall back to the default priorities
396 ServerInstance->Logs->Log("m_ssl_gnutls",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));
397 gnutls_priority_init(&priority, "NORMAL", NULL);
401 if (priorities != "NORMAL")
402 ServerInstance->Logs->Log("m_ssl_gnutls",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.");
405 #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
406 gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
408 gnutls_certificate_set_retrieve_function (x509_cred, cert_callback);
410 ret = gnutls_dh_params_init(&dh_params);
411 dh_alloc = (ret >= 0);
413 ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
415 // This may be on a large (once a day or week) timer eventually.
419 void GenerateDHParams()
421 // Generate Diffie Hellman parameters - for use with DHE
422 // kx algorithms. These should be discarded and regenerated
423 // once a day, once a week or once a month. Depending on the
424 // security requirements.
431 if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
432 ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
437 for(unsigned int i=0; i < x509_certs.size(); i++)
438 gnutls_x509_crt_deinit(x509_certs[i]);
440 gnutls_x509_privkey_deinit(x509_key);
441 #ifdef GNUTLS_NEW_PRIO_API
442 gnutls_priority_deinit(priority);
446 gnutls_dh_params_deinit(dh_params);
448 gnutls_certificate_free_credentials(x509_cred);
450 gnutls_global_deinit();
452 ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
455 void OnCleanup(int target_type, void* item)
457 if(target_type == TYPE_USER)
459 LocalUser* user = IS_LOCAL(static_cast<User*>(item));
461 if (user && user->eh.GetIOHook() == this)
463 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
464 // Potentially there could be multiple SSL modules loaded at once on different ports.
465 ServerInstance->Users->QuitUser(user, "SSL module unloading");
472 return Version("Provides SSL support for clients", VF_VENDOR);
476 void On005Numeric(std::string &output)
478 if (!sslports.empty())
479 output.append(" SSL=" + sslports);
480 if (starttls.enabled)
481 output.append(" STARTTLS");
484 void OnHookIO(StreamSocket* user, ListenSocket* lsb)
486 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls")
488 /* Hook the user with our module */
489 user->AddIOHook(this);
493 void OnRequest(Request& request)
495 if (strcmp("GET_SSL_CERT", request.id) == 0)
497 SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
498 int fd = req.sock->GetFd();
499 issl_session* session = &sessions[fd];
501 req.cert = session->cert;
505 void InitSession(StreamSocket* user, bool me_server)
507 issl_session* session = &sessions[user->GetFd()];
509 gnutls_init(&session->sess, me_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
511 #ifdef GNUTLS_NEW_PRIO_API
512 gnutls_priority_set(session->sess, priority);
514 gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
515 gnutls_dh_set_prime_bits(session->sess, dh_bits);
516 gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
517 gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
518 gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
521 gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
523 Handshake(session, user);
526 void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
528 issl_session* session = &sessions[user->GetFd()];
530 /* For STARTTLS: Don't try and init a session on a socket that already has a session */
534 InitSession(user, true);
537 void OnStreamSocketConnect(StreamSocket* user)
539 InitSession(user, false);
542 void OnStreamSocketClose(StreamSocket* user)
544 CloseSession(&sessions[user->GetFd()]);
547 int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
549 issl_session* session = &sessions[user->GetFd()];
553 CloseSession(session);
554 user->SetError("No SSL session");
558 if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE)
560 // The handshake isn't finished, try to finish it.
562 if(!Handshake(session, user))
564 if (session->status != ISSL_CLOSING)
570 // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
572 if (session->status == ISSL_HANDSHAKEN)
574 char* buffer = ServerInstance->GetReadBuffer();
575 size_t bufsiz = ServerInstance->Config->NetBufferSize;
576 int ret = gnutls_record_recv(session->sess, buffer, bufsiz);
579 recvq.append(buffer, ret);
582 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
588 user->SetError("Connection closed");
589 CloseSession(session);
594 user->SetError(gnutls_strerror(ret));
595 CloseSession(session);
599 else if (session->status == ISSL_CLOSING)
605 int OnStreamSocketWrite(StreamSocket* user, std::string& sendq)
607 issl_session* session = &sessions[user->GetFd()];
611 CloseSession(session);
612 user->SetError("No SSL session");
616 if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ)
618 // The handshake isn't finished, try to finish it.
619 Handshake(session, user);
620 if (session->status != ISSL_CLOSING)
627 if (session->status == ISSL_HANDSHAKEN)
629 ret = gnutls_record_send(session->sess, sendq.data(), sendq.length());
631 if (ret == (int)sendq.length())
633 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE);
638 sendq = sendq.substr(ret);
639 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
642 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
644 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
649 user->SetError(gnutls_strerror(ret));
650 CloseSession(session);
658 bool Handshake(issl_session* session, StreamSocket* user)
660 int ret = gnutls_handshake(session->sess);
664 if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
666 // Handshake needs resuming later, read() or write() would have blocked.
668 if(gnutls_record_get_direction(session->sess) == 0)
670 // gnutls_handshake() wants to read() again.
671 session->status = ISSL_HANDSHAKING_READ;
672 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
676 // gnutls_handshake() wants to write() again.
677 session->status = ISSL_HANDSHAKING_WRITE;
678 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
683 user->SetError("Handshake Failed - " + std::string(gnutls_strerror(ret)));
684 CloseSession(session);
685 session->status = ISSL_CLOSING;
692 // Change the seesion state
693 session->status = ISSL_HANDSHAKEN;
695 VerifyCertificate(session,user);
697 // Finish writing, if any left
698 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
704 void OnUserConnect(LocalUser* user)
706 if (user->eh.GetIOHook() == this)
708 if (sessions[user->eh.GetFd()].sess)
710 const gnutls_session_t& sess = sessions[user->eh.GetFd()].sess;
711 std::string cipher = UnknownIfNULL(gnutls_kx_get_name(gnutls_kx_get(sess)));
712 cipher.append("-").append(UnknownIfNULL(gnutls_cipher_get_name(gnutls_cipher_get(sess)))).append("-");
713 cipher.append(UnknownIfNULL(gnutls_mac_get_name(gnutls_mac_get(sess))));
715 ssl_cert* cert = sessions[user->eh.GetFd()].cert;
716 if (cert->fingerprint.empty())
717 user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), cipher.c_str());
719 user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
720 " and your SSL fingerprint is %s", user->nick.c_str(), cipher.c_str(), cert->fingerprint.c_str());
725 void CloseSession(issl_session* session)
729 gnutls_bye(session->sess, GNUTLS_SHUT_WR);
730 gnutls_deinit(session->sess);
732 session->sess = NULL;
733 session->cert = NULL;
734 session->status = ISSL_NONE;
737 void VerifyCertificate(issl_session* session, StreamSocket* user)
739 if (!session->sess || !user)
743 const gnutls_datum_t* cert_list;
745 unsigned int cert_list_size;
746 gnutls_x509_crt_t cert;
748 unsigned char digest[MAXBUF];
749 size_t digest_size = sizeof(digest);
750 size_t name_size = sizeof(name);
751 ssl_cert* certinfo = new ssl_cert;
752 session->cert = certinfo;
754 /* This verification function uses the trusted CAs in the credentials
755 * structure. So you must have installed one or more CA certificates.
757 ret = gnutls_certificate_verify_peers2(session->sess, &status);
761 certinfo->error = std::string(gnutls_strerror(ret));
765 certinfo->invalid = (status & GNUTLS_CERT_INVALID);
766 certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
767 certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
768 certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
770 /* Up to here the process is the same for X.509 certificates and
771 * OpenPGP keys. From now on X.509 certificates are assumed. This can
772 * be easily extended to work with openpgp keys as well.
774 if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
776 certinfo->error = "No X509 keys sent";
780 ret = gnutls_x509_crt_init(&cert);
783 certinfo->error = gnutls_strerror(ret);
788 cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
789 if (cert_list == NULL)
791 certinfo->error = "No certificate was found";
792 goto info_done_dealloc;
795 /* This is not a real world example, since we only check the first
796 * certificate in the given chain.
799 ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
802 certinfo->error = gnutls_strerror(ret);
803 goto info_done_dealloc;
806 gnutls_x509_crt_get_dn(cert, name, &name_size);
809 gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
810 certinfo->issuer = name;
812 if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
814 certinfo->error = gnutls_strerror(ret);
818 certinfo->fingerprint = irc::hex(digest, digest_size);
821 /* Beware here we do not check for errors.
823 if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
825 certinfo->error = "Not activated, or expired certificate";
829 gnutls_x509_crt_deinit(cert);
832 void OnEvent(Event& ev)
834 if (starttls.enabled)
835 capHandler.HandleEvent(ev);
839 MODULE_INIT(ModuleSSLGnuTLS)