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/>.
25 #include <gnutls/gnutls.h>
26 #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","") */
44 /* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") -lgcrypt */
46 // These don't exist in older GnuTLS versions
47 #if(GNUTLS_VERSION_MAJOR < 2)
48 typedef gnutls_certificate_credentials_t gnutls_certificate_credentials;
49 typedef gnutls_dh_params_t gnutls_dh_params;
52 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
54 static std::vector<gnutls_x509_crt_t> x509_certs;
55 static gnutls_x509_privkey_t x509_key;
56 #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
57 static int cert_callback (gnutls_session_t session, const gnutls_datum_t * req_ca_rdn, int nreqs,
58 const gnutls_pk_algorithm_t * sign_algos, int sign_algos_length, gnutls_retr_st * st) {
60 st->type = GNUTLS_CRT_X509;
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_retr2_st * st) {
64 st->cert_type = GNUTLS_CRT_X509;
65 st->key_type = GNUTLS_PRIVKEY_X509;
67 st->ncerts = x509_certs.size();
68 st->cert.x509 = &x509_certs[0];
69 st->key.x509 = x509_key;
75 static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t user_wrap, void* buffer, size_t size)
77 StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
78 if (user->GetEventMask() & FD_READ_WILL_BLOCK)
83 int rv = ServerInstance->SE->Recv(user, reinterpret_cast<char *>(buffer), size, 0);
85 ServerInstance->SE->ChangeEventMask(user, FD_READ_WILL_BLOCK);
89 static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t user_wrap, const void* buffer, size_t size)
91 StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
92 if (user->GetEventMask() & FD_WRITE_WILL_BLOCK)
97 int rv = ServerInstance->SE->Send(user, reinterpret_cast<const char *>(buffer), size, 0);
99 ServerInstance->SE->ChangeEventMask(user, FD_WRITE_WILL_BLOCK);
103 class RandGen : public HandlerBase2<void, char*, size_t>
107 void Call(char* buffer, size_t len)
109 gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
113 /** Represents an SSL user's extra data
118 gnutls_session_t sess;
120 reference<ssl_cert> cert;
121 issl_session() : sess(NULL) {}
124 class CommandStartTLS : public SplitCommand
128 CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS")
131 works_before_reg = true;
134 CmdResult HandleLocal(const std::vector<std::string> ¶meters, LocalUser *user)
138 user->WriteNumeric(691, "%s :STARTTLS is not enabled", user->nick.c_str());
142 if (user->registered == REG_ALL)
144 user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration is complete", user->nick.c_str());
148 if (!user->eh.GetIOHook())
150 user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
151 /* We need to flush the write buffer prior to adding the IOHook,
152 * otherwise we'll be sending this line inside the SSL session - which
153 * won't start its handshake until the client gets this line. Currently,
154 * we assume the write will not block here; this is usually safe, as
155 * STARTTLS is sent very early on in the registration phase, where the
156 * user hasn't built up much sendq. Handling a blocked write here would
160 user->eh.AddIOHook(creator);
161 creator->OnStreamSocketAccept(&user->eh, NULL, NULL);
164 user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
171 class ModuleSSLGnuTLS : public Module
173 issl_session* sessions;
175 gnutls_certificate_credentials_t x509_cred;
176 gnutls_dh_params_t dh_params;
177 gnutls_digest_algorithm_t hash;
178 gnutls_priority_t priority;
180 std::string sslports;
187 CommandStartTLS starttls;
189 GenericCap capHandler;
190 ServiceProvider iohook;
194 : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK)
196 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
198 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
200 gnutls_global_init(); // This must be called once in the program
201 gnutls_x509_privkey_init(&x509_key);
202 // Init this here so it's always initialized, avoids an extra boolean
203 gnutls_priority_init(&priority, "NORMAL", NULL);
211 // Needs the flag as it ignores a plain /rehash
212 OnModuleRehash(NULL,"ssl");
214 ServerInstance->GenRandom = &randhandler;
216 // Void return, guess we assume success
217 gnutls_certificate_set_dh_params(x509_cred, dh_params);
218 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect,
219 I_OnEvent, I_OnHookIO };
220 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
222 ServerInstance->Modules->AddService(iohook);
223 ServerInstance->AddCommand(&starttls);
226 void OnRehash(User* user)
230 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
231 starttls.enabled = Conf->getBool("starttls", true);
233 if (Conf->getBool("showports", true))
235 sslports = Conf->getString("advertisedports");
236 if (!sslports.empty())
239 for (size_t i = 0; i < ServerInstance->ports.size(); i++)
241 ListenSocket* port = ServerInstance->ports[i];
242 if (port->bind_tag->getString("ssl") != "gnutls")
245 const std::string& portid = port->bind_desc;
246 ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
248 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
251 * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
252 * the IP:port in ISUPPORT.
254 * We used to advertise all ports seperated by a ';' char that matched the above criteria,
255 * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
256 * To solve this by default we now only display the first IP:port found and let the user
257 * configure the exact value for the 005 token, if necessary.
266 void OnModuleRehash(User* user, const std::string ¶m)
272 std::string certfile;
277 ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
279 cafile = Conf->getString("cafile", CONFIG_PATH "/ca.pem");
280 crlfile = Conf->getString("crlfile", CONFIG_PATH "/crl.pem");
281 certfile = Conf->getString("certfile", CONFIG_PATH "/cert.pem");
282 keyfile = Conf->getString("keyfile", CONFIG_PATH "/key.pem");
283 dh_bits = Conf->getInt("dhbits");
284 std::string hashname = Conf->getString("hash", "md5");
286 // The GnuTLS manual states that the gnutls_set_default_priority()
287 // call we used previously when initializing the session is the same
288 // as setting the "NORMAL" priority string.
289 // Thus if the setting below is not in the config we will behave exactly
290 // the same as before, when the priority setting wasn't available.
291 std::string priorities = Conf->getString("priority", "NORMAL");
293 if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
296 if (hashname == "md5")
297 hash = GNUTLS_DIG_MD5;
298 else if (hashname == "sha1")
299 hash = GNUTLS_DIG_SHA1;
301 throw ModuleException("Unknown hash type " + hashname);
308 gnutls_dh_params_deinit(dh_params);
314 // Deallocate the old credentials
315 gnutls_certificate_free_credentials(x509_cred);
317 for(unsigned int i=0; i < x509_certs.size(); i++)
318 gnutls_x509_crt_deinit(x509_certs[i]);
322 ret = gnutls_certificate_allocate_credentials(&x509_cred);
323 cred_alloc = (ret >= 0);
325 ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret));
327 if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
328 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));
330 if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
331 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));
335 reader.LoadFile(certfile);
336 std::string cert_string = reader.Contents();
337 gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), static_cast<unsigned int>(cert_string.length()) };
339 reader.LoadFile(keyfile);
340 std::string key_string = reader.Contents();
341 gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), static_cast<unsigned int>(key_string.length()) };
343 // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
344 unsigned int certcount = Conf->getInt("certcount", 3);
345 x509_certs.resize(certcount);
346 ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
348 throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + std::string(gnutls_strerror(ret)));
349 x509_certs.resize(certcount);
351 if((ret = gnutls_x509_privkey_import(x509_key, &key_datum, GNUTLS_X509_FMT_PEM)) < 0)
352 throw ModuleException("Unable to load GnuTLS server private key (" + keyfile + "): " + std::string(gnutls_strerror(ret)));
354 if((ret = gnutls_certificate_set_x509_key(x509_cred, &x509_certs[0], certcount, x509_key)) < 0)
355 throw ModuleException("Unable to set GnuTLS cert/key pair: " + std::string(gnutls_strerror(ret)));
357 // It's safe to call this every time as we cannot have this uninitialized, see constructor and below.
358 gnutls_priority_deinit(priority);
360 // Try to set the priorities for ciphers, kex methods etc. to the user supplied string
361 // If the user did not supply anything then the string is already set to "NORMAL"
362 const char* priocstr = priorities.c_str();
363 const char* prioerror;
365 if ((ret = gnutls_priority_init(&priority, priocstr, &prioerror)) < 0)
367 // gnutls did not understand the user supplied string, log and fall back to the default priorities
368 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));
369 gnutls_priority_init(&priority, "NORMAL", NULL);
372 #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
373 gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
375 gnutls_certificate_set_retrieve_function (x509_cred, cert_callback);
377 ret = gnutls_dh_params_init(&dh_params);
378 dh_alloc = (ret >= 0);
380 ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
382 // This may be on a large (once a day or week) timer eventually.
386 void GenerateDHParams()
388 // Generate Diffie Hellman parameters - for use with DHE
389 // kx algorithms. These should be discarded and regenerated
390 // once a day, once a week or once a month. Depending on the
391 // security requirements.
398 if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
399 ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
404 for(unsigned int i=0; i < x509_certs.size(); i++)
405 gnutls_x509_crt_deinit(x509_certs[i]);
407 gnutls_x509_privkey_deinit(x509_key);
408 gnutls_priority_deinit(priority);
411 gnutls_dh_params_deinit(dh_params);
413 gnutls_certificate_free_credentials(x509_cred);
415 gnutls_global_deinit();
417 ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
420 void OnCleanup(int target_type, void* item)
422 if(target_type == TYPE_USER)
424 LocalUser* user = IS_LOCAL(static_cast<User*>(item));
426 if (user && user->eh.GetIOHook() == this)
428 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
429 // Potentially there could be multiple SSL modules loaded at once on different ports.
430 ServerInstance->Users->QuitUser(user, "SSL module unloading");
437 return Version("Provides SSL support for clients", VF_VENDOR);
441 void On005Numeric(std::string &output)
443 if (!sslports.empty())
444 output.append(" SSL=" + sslports);
445 if (starttls.enabled)
446 output.append(" STARTTLS");
449 void OnHookIO(StreamSocket* user, ListenSocket* lsb)
451 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls")
453 /* Hook the user with our module */
454 user->AddIOHook(this);
458 void OnRequest(Request& request)
460 if (strcmp("GET_SSL_CERT", request.id) == 0)
462 SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
463 int fd = req.sock->GetFd();
464 issl_session* session = &sessions[fd];
466 req.cert = session->cert;
470 void InitSession(StreamSocket* user, bool me_server)
472 issl_session* session = &sessions[user->GetFd()];
474 gnutls_init(&session->sess, me_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
476 gnutls_priority_set(session->sess, priority);
477 gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
478 gnutls_dh_set_prime_bits(session->sess, dh_bits);
479 gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
480 gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
481 gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
484 gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
486 Handshake(session, user);
489 void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
491 issl_session* session = &sessions[user->GetFd()];
493 /* For STARTTLS: Don't try and init a session on a socket that already has a session */
497 InitSession(user, true);
500 void OnStreamSocketConnect(StreamSocket* user)
502 InitSession(user, false);
505 void OnStreamSocketClose(StreamSocket* user)
507 CloseSession(&sessions[user->GetFd()]);
510 int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
512 issl_session* session = &sessions[user->GetFd()];
516 CloseSession(session);
517 user->SetError("No SSL session");
521 if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE)
523 // The handshake isn't finished, try to finish it.
525 if(!Handshake(session, user))
527 if (session->status != ISSL_CLOSING)
533 // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
535 if (session->status == ISSL_HANDSHAKEN)
537 char* buffer = ServerInstance->GetReadBuffer();
538 size_t bufsiz = ServerInstance->Config->NetBufferSize;
539 int ret = gnutls_record_recv(session->sess, buffer, bufsiz);
542 recvq.append(buffer, ret);
545 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
551 user->SetError("SSL Connection closed");
552 CloseSession(session);
557 user->SetError(gnutls_strerror(ret));
558 CloseSession(session);
562 else if (session->status == ISSL_CLOSING)
568 int OnStreamSocketWrite(StreamSocket* user, std::string& sendq)
570 issl_session* session = &sessions[user->GetFd()];
574 CloseSession(session);
575 user->SetError("No SSL session");
579 if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ)
581 // The handshake isn't finished, try to finish it.
582 Handshake(session, user);
583 if (session->status != ISSL_CLOSING)
590 if (session->status == ISSL_HANDSHAKEN)
592 ret = gnutls_record_send(session->sess, sendq.data(), sendq.length());
594 if (ret == (int)sendq.length())
596 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE);
601 sendq = sendq.substr(ret);
602 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
605 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
607 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
612 user->SetError(gnutls_strerror(ret));
613 CloseSession(session);
621 bool Handshake(issl_session* session, StreamSocket* user)
623 int ret = gnutls_handshake(session->sess);
627 if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
629 // Handshake needs resuming later, read() or write() would have blocked.
631 if(gnutls_record_get_direction(session->sess) == 0)
633 // gnutls_handshake() wants to read() again.
634 session->status = ISSL_HANDSHAKING_READ;
635 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
639 // gnutls_handshake() wants to write() again.
640 session->status = ISSL_HANDSHAKING_WRITE;
641 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
646 user->SetError("Handshake Failed - " + std::string(gnutls_strerror(ret)));
647 CloseSession(session);
648 session->status = ISSL_CLOSING;
655 // Change the seesion state
656 session->status = ISSL_HANDSHAKEN;
658 VerifyCertificate(session,user);
660 // Finish writing, if any left
661 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
667 void OnUserConnect(LocalUser* user)
669 if (user->eh.GetIOHook() == this)
671 if (sessions[user->eh.GetFd()].sess)
673 ssl_cert* cert = sessions[user->eh.GetFd()].cert;
674 std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->eh.GetFd()].sess));
675 cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->eh.GetFd()].sess))).append("-");
676 cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->eh.GetFd()].sess)));
677 if (cert->fingerprint.empty())
678 user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), cipher.c_str());
680 user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
681 " and your SSL fingerprint is %s", user->nick.c_str(), cipher.c_str(), cert->fingerprint.c_str());
686 void CloseSession(issl_session* session)
690 gnutls_bye(session->sess, GNUTLS_SHUT_WR);
691 gnutls_deinit(session->sess);
693 session->sess = NULL;
694 session->cert = NULL;
695 session->status = ISSL_NONE;
698 void VerifyCertificate(issl_session* session, StreamSocket* user)
700 if (!session->sess || !user)
704 const gnutls_datum_t* cert_list;
706 unsigned int cert_list_size;
707 gnutls_x509_crt_t cert;
709 unsigned char digest[MAXBUF];
710 size_t digest_size = sizeof(digest);
711 size_t name_size = sizeof(name);
712 ssl_cert* certinfo = new ssl_cert;
713 session->cert = certinfo;
715 /* This verification function uses the trusted CAs in the credentials
716 * structure. So you must have installed one or more CA certificates.
718 ret = gnutls_certificate_verify_peers2(session->sess, &status);
722 certinfo->error = std::string(gnutls_strerror(ret));
726 certinfo->invalid = (status & GNUTLS_CERT_INVALID);
727 certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
728 certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
729 certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
731 /* Up to here the process is the same for X.509 certificates and
732 * OpenPGP keys. From now on X.509 certificates are assumed. This can
733 * be easily extended to work with openpgp keys as well.
735 if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
737 certinfo->error = "No X509 keys sent";
741 ret = gnutls_x509_crt_init(&cert);
744 certinfo->error = gnutls_strerror(ret);
749 cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
750 if (cert_list == NULL)
752 certinfo->error = "No certificate was found";
753 goto info_done_dealloc;
756 /* This is not a real world example, since we only check the first
757 * certificate in the given chain.
760 ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
763 certinfo->error = gnutls_strerror(ret);
764 goto info_done_dealloc;
767 gnutls_x509_crt_get_dn(cert, name, &name_size);
770 gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
771 certinfo->issuer = name;
773 if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
775 certinfo->error = gnutls_strerror(ret);
779 certinfo->fingerprint = irc::hex(digest, digest_size);
782 /* Beware here we do not check for errors.
784 if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
786 certinfo->error = "Not activated, or expired certificate";
790 gnutls_x509_crt_deinit(cert);
793 void OnEvent(Event& ev)
795 if (starttls.enabled)
796 capHandler.HandleEvent(ev);
800 MODULE_INIT(ModuleSSLGnuTLS)