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>
27 #include "modules/ssl.h"
30 #if ((GNUTLS_VERSION_MAJOR > 2) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR > 9) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR == 9 && GNUTLS_VERSION_PATCH >= 8))
31 #define GNUTLS_HAS_MAC_GET_ID
32 #include <gnutls/crypto.h>
35 #if (GNUTLS_VERSION_MAJOR > 2 || GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR > 12)
36 # define GNUTLS_HAS_RND
42 # pragma comment(lib, "libgnutls.lib")
43 # pragma comment(lib, "libgcrypt.lib")
44 # pragma comment(lib, "libgpg-error.lib")
45 # pragma comment(lib, "user32.lib")
46 # pragma comment(lib, "advapi32.lib")
47 # pragma comment(lib, "libgcc.lib")
48 # pragma comment(lib, "libmingwex.lib")
49 # pragma comment(lib, "gdi32.lib")
52 /* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") eval("print `libgcrypt-config --cflags | tr -d \r` if `pkg-config --modversion gnutls 2>/dev/null | tr -d \r` lt '2.12'") -Wno-pedantic */
53 /* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") eval("print `libgcrypt-config --libs | tr -d \r` if `pkg-config --modversion gnutls 2>/dev/null | tr -d \r` lt '2.12'") */
55 #ifndef GNUTLS_VERSION_MAJOR
56 #define GNUTLS_VERSION_MAJOR LIBGNUTLS_VERSION_MAJOR
57 #define GNUTLS_VERSION_MINOR LIBGNUTLS_VERSION_MINOR
58 #define GNUTLS_VERSION_PATCH LIBGNUTLS_VERSION_PATCH
61 // These don't exist in older GnuTLS versions
62 #if ((GNUTLS_VERSION_MAJOR > 2) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR > 1) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR == 1 && GNUTLS_VERSION_PATCH >= 7))
63 #define GNUTLS_NEW_PRIO_API
66 #if(GNUTLS_VERSION_MAJOR < 2)
67 typedef gnutls_certificate_credentials_t gnutls_certificate_credentials;
68 typedef gnutls_dh_params_t gnutls_dh_params;
71 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
73 #if (GNUTLS_VERSION_MAJOR > 2 || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR >= 12))
74 #define GNUTLS_NEW_CERT_CALLBACK_API
75 typedef gnutls_retr2_st cert_cb_last_param_type;
77 typedef gnutls_retr_st cert_cb_last_param_type;
80 class RandGen : public HandlerBase2<void, char*, size_t>
83 void Call(char* buffer, size_t len)
86 gnutls_rnd(GNUTLS_RND_RANDOM, buffer, len);
88 gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
98 Init() { gnutls_global_init(); }
99 ~Init() { gnutls_global_deinit(); }
102 class Exception : public ModuleException
105 Exception(const std::string& reason)
106 : ModuleException(reason) { }
109 void ThrowOnError(int errcode, const char* msg)
113 std::string reason = msg;
114 reason.append(" :").append(gnutls_strerror(errcode));
115 throw Exception(reason);
119 /** Used to create a gnutls_datum_t* from a std::string
123 gnutls_datum_t datum;
126 Datum(const std::string& dat)
128 datum.data = (unsigned char*)dat.data();
129 datum.size = static_cast<unsigned int>(dat.length());
132 const gnutls_datum_t* get() const { return &datum; }
137 gnutls_digest_algorithm_t hash;
140 // Nothing to deallocate, constructor may throw freely
141 Hash(const std::string& hashname)
143 // As older versions of gnutls can't do this, let's disable it where needed.
144 #ifdef GNUTLS_HAS_MAC_GET_ID
145 // As gnutls_digest_algorithm_t and gnutls_mac_algorithm_t are mapped 1:1, we can do this
146 // There is no gnutls_dig_get_id() at the moment, but it may come later
147 hash = (gnutls_digest_algorithm_t)gnutls_mac_get_id(hashname.c_str());
148 if (hash == GNUTLS_DIG_UNKNOWN)
149 throw Exception("Unknown hash type " + hashname);
151 // Check if the user is giving us something that is a valid MAC but not digest
152 gnutls_hash_hd_t is_digest;
153 if (gnutls_hash_init(&is_digest, hash) < 0)
154 throw Exception("Unknown hash type " + hashname);
155 gnutls_hash_deinit(is_digest, NULL);
157 if (hashname == "md5")
158 hash = GNUTLS_DIG_MD5;
159 else if (hashname == "sha1")
160 hash = GNUTLS_DIG_SHA1;
162 throw Exception("Unknown hash type " + hashname);
166 gnutls_digest_algorithm_t get() const { return hash; }
171 gnutls_dh_params_t dh_params;
175 ThrowOnError(gnutls_dh_params_init(&dh_params), "gnutls_dh_params_init() failed");
180 static std::auto_ptr<DHParams> Import(const std::string& dhstr)
182 std::auto_ptr<DHParams> dh(new DHParams);
183 int ret = gnutls_dh_params_import_pkcs3(dh->dh_params, Datum(dhstr).get(), GNUTLS_X509_FMT_PEM);
184 ThrowOnError(ret, "Unable to import DH params");
189 static std::auto_ptr<DHParams> Generate(unsigned int bits)
191 std::auto_ptr<DHParams> dh(new DHParams);
192 ThrowOnError(gnutls_dh_params_generate2(dh->dh_params, bits), "Unable to generate DH params");
198 gnutls_dh_params_deinit(dh_params);
201 const gnutls_dh_params_t& get() const { return dh_params; }
206 /** Ensure that the key is deinited in case the constructor of X509Key throws
211 gnutls_x509_privkey_t key;
215 ThrowOnError(gnutls_x509_privkey_init(&key), "gnutls_x509_privkey_init() failed");
220 gnutls_x509_privkey_deinit(key);
226 X509Key(const std::string& keystr)
228 int ret = gnutls_x509_privkey_import(key.key, Datum(keystr).get(), GNUTLS_X509_FMT_PEM);
229 ThrowOnError(ret, "Unable to import private key");
232 gnutls_x509_privkey_t& get() { return key.key; }
237 std::vector<gnutls_x509_crt_t> certs;
241 X509CertList(const std::string& certstr)
243 unsigned int certcount = 3;
244 certs.resize(certcount);
245 Datum datum(certstr);
247 int ret = gnutls_x509_crt_list_import(raw(), &certcount, datum.get(), GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
248 if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
250 // the buffer wasn't big enough to hold all certs but gnutls changed certcount to the number of available certs,
251 // try again with a bigger buffer
252 certs.resize(certcount);
253 ret = gnutls_x509_crt_list_import(raw(), &certcount, datum.get(), GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
256 ThrowOnError(ret, "Unable to load certificates");
258 // Resize the vector to the actual number of certs because we rely on its size being correct
259 // when deallocating the certs
260 certs.resize(certcount);
265 for (std::vector<gnutls_x509_crt_t>::iterator i = certs.begin(); i != certs.end(); ++i)
266 gnutls_x509_crt_deinit(*i);
269 gnutls_x509_crt_t* raw() { return &certs[0]; }
270 unsigned int size() const { return certs.size(); }
273 class X509CRL : public refcountbase
278 gnutls_x509_crl_t crl;
282 ThrowOnError(gnutls_x509_crl_init(&crl), "gnutls_x509_crl_init() failed");
287 gnutls_x509_crl_deinit(crl);
293 X509CRL(const std::string& crlstr)
295 int ret = gnutls_x509_crl_import(get(), Datum(crlstr).get(), GNUTLS_X509_FMT_PEM);
296 ThrowOnError(ret, "Unable to load certificate revocation list");
299 gnutls_x509_crl_t& get() { return crl.crl; }
302 #ifdef GNUTLS_NEW_PRIO_API
305 gnutls_priority_t priority;
308 Priority(const std::string& priorities)
310 // Try to set the priorities for ciphers, kex methods etc. to the user supplied string
311 // If the user did not supply anything then the string is already set to "NORMAL"
312 const char* priocstr = priorities.c_str();
313 const char* prioerror;
315 int ret = gnutls_priority_init(&priority, priocstr, &prioerror);
318 // gnutls did not understand the user supplied string
319 throw Exception("Unable to initialize priorities to \"" + priorities + "\": " + gnutls_strerror(ret) + " Syntax error at position " + ConvToStr((unsigned int) (prioerror - priocstr)));
325 gnutls_priority_deinit(priority);
328 void SetupSession(gnutls_session_t sess)
330 gnutls_priority_set(sess, priority);
334 /** Dummy class, used when gnutls_priority_set() is not available
339 Priority(const std::string& priorities)
341 if (priorities != "NORMAL")
342 throw Exception("You've set a non-default priority string, but GnuTLS lacks support for it");
345 static void SetupSession(gnutls_session_t sess)
347 // Always set the default priorities
348 gnutls_set_default_priority(sess);
353 class CertCredentials
355 /** DH parameters associated with these credentials
357 std::auto_ptr<DHParams> dh;
360 gnutls_certificate_credentials_t cred;
365 ThrowOnError(gnutls_certificate_allocate_credentials(&cred), "Cannot allocate certificate credentials");
370 gnutls_certificate_free_credentials(cred);
373 /** Associates these credentials with the session
375 void SetupSession(gnutls_session_t sess)
377 gnutls_credentials_set(sess, GNUTLS_CRD_CERTIFICATE, cred);
380 /** Set the given DH parameters to be used with these credentials
382 void SetDH(std::auto_ptr<DHParams>& DH)
385 gnutls_certificate_set_dh_params(cred, dh->get());
389 class X509Credentials : public CertCredentials
395 /** Certificate list, presented to the peer
399 /** Trusted CA, may be NULL
401 std::auto_ptr<X509CertList> trustedca;
403 /** Certificate revocation list, may be NULL
405 std::auto_ptr<X509CRL> crl;
407 static int cert_callback(gnutls_session_t session, const gnutls_datum_t* req_ca_rdn, int nreqs, const gnutls_pk_algorithm_t* sign_algos, int sign_algos_length, cert_cb_last_param_type* st);
410 X509Credentials(const std::string& certstr, const std::string& keystr)
414 // Throwing is ok here, the destructor of Credentials is called in that case
415 int ret = gnutls_certificate_set_x509_key(cred, certs.raw(), certs.size(), key.get());
416 ThrowOnError(ret, "Unable to set cert/key pair");
418 #ifdef GNUTLS_NEW_CERT_CALLBACK_API
419 gnutls_certificate_set_retrieve_function(cred, cert_callback);
421 gnutls_certificate_client_set_retrieve_function(cred, cert_callback);
425 /** Sets the trusted CA and the certificate revocation list
426 * to use when verifying certificates
428 void SetCA(std::auto_ptr<X509CertList>& certlist, std::auto_ptr<X509CRL>& CRL)
430 // Do nothing if certlist is NULL
433 int ret = gnutls_certificate_set_x509_trust(cred, certlist->raw(), certlist->size());
434 ThrowOnError(ret, "gnutls_certificate_set_x509_trust() failed");
438 ret = gnutls_certificate_set_x509_crl(cred, &CRL->get(), 1);
439 ThrowOnError(ret, "gnutls_certificate_set_x509_crl() failed");
442 trustedca = certlist;
448 class Profile : public refcountbase
450 /** Name of this profile
452 const std::string name;
454 /** X509 certificate(s) and key
456 X509Credentials x509cred;
458 /** The minimum length in bits for the DH prime to be accepted as a client
460 unsigned int min_dh_bits;
462 /** Hashing algorithm to use when generating certificate fingerprints
466 /** Priorities for ciphers, compression methods, etc.
470 Profile(const std::string& profilename, const std::string& certstr, const std::string& keystr,
471 std::auto_ptr<DHParams>& DH, unsigned int mindh, const std::string& hashstr,
472 const std::string& priostr, std::auto_ptr<X509CertList>& CA, std::auto_ptr<X509CRL>& CRL)
474 , x509cred(certstr, keystr)
480 x509cred.SetCA(CA, CRL);
483 static std::string ReadFile(const std::string& filename)
485 FileReader reader(filename);
486 std::string ret = reader.GetString();
488 throw Exception("Cannot read file " + filename);
493 static reference<Profile> Create(const std::string& profilename, ConfigTag* tag)
495 std::string certstr = ReadFile(tag->getString("certfile", "cert.pem"));
496 std::string keystr = ReadFile(tag->getString("keyfile", "key.pem"));
498 std::auto_ptr<DHParams> dh;
499 int gendh = tag->getInt("gendh");
502 gendh = (gendh < 1024 ? 1024 : gendh);
503 dh = DHParams::Generate(gendh);
506 dh = DHParams::Import(ReadFile(tag->getString("dhfile", "dhparams.pem")));
508 // Use default priority string if this tag does not specify one
509 std::string priostr = tag->getString("priority", "NORMAL");
510 unsigned int mindh = tag->getInt("mindhbits", 1024);
511 std::string hashstr = tag->getString("hash", "md5");
513 // Load trusted CA and revocation list, if set
514 std::auto_ptr<X509CertList> ca;
515 std::auto_ptr<X509CRL> crl;
516 std::string filename = tag->getString("cafile");
517 if (!filename.empty())
519 ca.reset(new X509CertList(ReadFile(filename)));
521 filename = tag->getString("crlfile");
522 if (!filename.empty())
523 crl.reset(new X509CRL(ReadFile(filename)));
526 return new Profile(profilename, certstr, keystr, dh, mindh, hashstr, priostr, ca, crl);
529 /** Set up the given session with the settings in this profile
531 void SetupSession(gnutls_session_t sess)
533 priority.SetupSession(sess);
534 x509cred.SetupSession(sess);
535 gnutls_dh_set_prime_bits(sess, min_dh_bits);
538 const std::string& GetName() const { return name; }
539 X509Credentials& GetX509Credentials() { return x509cred; }
540 gnutls_digest_algorithm_t GetHash() const { return hash.get(); }
544 class GnuTLSIOHook : public SSLIOHook
547 gnutls_session_t sess;
549 reference<GnuTLS::Profile> profile;
551 void InitSession(StreamSocket* user, bool me_server)
553 gnutls_init(&sess, me_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
555 profile->SetupSession(sess);
556 gnutls_transport_set_ptr(sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
557 gnutls_transport_set_push_function(sess, gnutls_push_wrapper);
558 gnutls_transport_set_pull_function(sess, gnutls_pull_wrapper);
561 gnutls_certificate_server_set_request(sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
568 gnutls_bye(this->sess, GNUTLS_SHUT_WR);
569 gnutls_deinit(this->sess);
576 bool Handshake(StreamSocket* user)
578 int ret = gnutls_handshake(this->sess);
582 if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
584 // Handshake needs resuming later, read() or write() would have blocked.
586 if (gnutls_record_get_direction(this->sess) == 0)
588 // gnutls_handshake() wants to read() again.
589 this->status = ISSL_HANDSHAKING_READ;
590 SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
594 // gnutls_handshake() wants to write() again.
595 this->status = ISSL_HANDSHAKING_WRITE;
596 SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
601 user->SetError("Handshake Failed - " + std::string(gnutls_strerror(ret)));
603 this->status = ISSL_CLOSING;
610 // Change the seesion state
611 this->status = ISSL_HANDSHAKEN;
615 // Finish writing, if any left
616 SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
622 void VerifyCertificate()
624 unsigned int certstatus;
625 const gnutls_datum_t* cert_list;
627 unsigned int cert_list_size;
628 gnutls_x509_crt_t cert;
630 unsigned char digest[512];
631 size_t digest_size = sizeof(digest);
632 size_t name_size = sizeof(str);
633 ssl_cert* certinfo = new ssl_cert;
634 this->certificate = certinfo;
636 /* This verification function uses the trusted CAs in the credentials
637 * structure. So you must have installed one or more CA certificates.
639 ret = gnutls_certificate_verify_peers2(this->sess, &certstatus);
643 certinfo->error = std::string(gnutls_strerror(ret));
647 certinfo->invalid = (certstatus & GNUTLS_CERT_INVALID);
648 certinfo->unknownsigner = (certstatus & GNUTLS_CERT_SIGNER_NOT_FOUND);
649 certinfo->revoked = (certstatus & GNUTLS_CERT_REVOKED);
650 certinfo->trusted = !(certstatus & GNUTLS_CERT_SIGNER_NOT_CA);
652 /* Up to here the process is the same for X.509 certificates and
653 * OpenPGP keys. From now on X.509 certificates are assumed. This can
654 * be easily extended to work with openpgp keys as well.
656 if (gnutls_certificate_type_get(this->sess) != GNUTLS_CRT_X509)
658 certinfo->error = "No X509 keys sent";
662 ret = gnutls_x509_crt_init(&cert);
665 certinfo->error = gnutls_strerror(ret);
670 cert_list = gnutls_certificate_get_peers(this->sess, &cert_list_size);
671 if (cert_list == NULL)
673 certinfo->error = "No certificate was found";
674 goto info_done_dealloc;
677 /* This is not a real world example, since we only check the first
678 * certificate in the given chain.
681 ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
684 certinfo->error = gnutls_strerror(ret);
685 goto info_done_dealloc;
688 gnutls_x509_crt_get_dn(cert, str, &name_size);
691 gnutls_x509_crt_get_issuer_dn(cert, str, &name_size);
692 certinfo->issuer = str;
694 if ((ret = gnutls_x509_crt_get_fingerprint(cert, profile->GetHash(), digest, &digest_size)) < 0)
696 certinfo->error = gnutls_strerror(ret);
700 certinfo->fingerprint = BinToHex(digest, digest_size);
703 /* Beware here we do not check for errors.
705 if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
707 certinfo->error = "Not activated, or expired certificate";
711 gnutls_x509_crt_deinit(cert);
714 static const char* UnknownIfNULL(const char* str)
716 return str ? str : "UNKNOWN";
719 static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t session_wrap, void* buffer, size_t size)
721 StreamSocket* sock = reinterpret_cast<StreamSocket*>(session_wrap);
723 GnuTLSIOHook* session = static_cast<GnuTLSIOHook*>(sock->GetIOHook());
726 if (sock->GetEventMask() & FD_READ_WILL_BLOCK)
729 gnutls_transport_set_errno(session->sess, EAGAIN);
736 int rv = SocketEngine::Recv(sock, reinterpret_cast<char *>(buffer), size, 0);
741 /* Windows doesn't use errno, but gnutls does, so check SocketEngine::IgnoreError()
742 * and then set errno appropriately.
743 * The gnutls library may also have a different errno variable than us, see
744 * gnutls_transport_set_errno(3).
746 gnutls_transport_set_errno(session->sess, SocketEngine::IgnoreError() ? EAGAIN : errno);
751 SocketEngine::ChangeEventMask(sock, FD_READ_WILL_BLOCK);
755 static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t session_wrap, const void* buffer, size_t size)
757 StreamSocket* sock = reinterpret_cast<StreamSocket*>(session_wrap);
759 GnuTLSIOHook* session = static_cast<GnuTLSIOHook*>(sock->GetIOHook());
762 if (sock->GetEventMask() & FD_WRITE_WILL_BLOCK)
765 gnutls_transport_set_errno(session->sess, EAGAIN);
772 int rv = SocketEngine::Send(sock, reinterpret_cast<const char *>(buffer), size, 0);
777 /* Windows doesn't use errno, but gnutls does, so check SocketEngine::IgnoreError()
778 * and then set errno appropriately.
779 * The gnutls library may also have a different errno variable than us, see
780 * gnutls_transport_set_errno(3).
782 gnutls_transport_set_errno(session->sess, SocketEngine::IgnoreError() ? EAGAIN : errno);
787 SocketEngine::ChangeEventMask(sock, FD_WRITE_WILL_BLOCK);
792 GnuTLSIOHook(IOHookProvider* hookprov, StreamSocket* sock, bool outbound, const reference<GnuTLS::Profile>& sslprofile)
793 : SSLIOHook(hookprov)
796 , profile(sslprofile)
798 InitSession(sock, outbound);
799 sock->AddIOHook(this);
803 void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
808 int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
813 user->SetError("No SSL session");
817 if (this->status == ISSL_HANDSHAKING_READ || this->status == ISSL_HANDSHAKING_WRITE)
819 // The handshake isn't finished, try to finish it.
821 if (!Handshake(user))
823 if (this->status != ISSL_CLOSING)
829 // If we resumed the handshake then this->status will be ISSL_HANDSHAKEN.
831 if (this->status == ISSL_HANDSHAKEN)
833 char* buffer = ServerInstance->GetReadBuffer();
834 size_t bufsiz = ServerInstance->Config->NetBufferSize;
835 int ret = gnutls_record_recv(this->sess, buffer, bufsiz);
838 recvq.append(buffer, ret);
841 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
847 user->SetError("Connection closed");
853 user->SetError(gnutls_strerror(ret));
858 else if (this->status == ISSL_CLOSING)
864 int OnStreamSocketWrite(StreamSocket* user, std::string& sendq) CXX11_OVERRIDE
869 user->SetError("No SSL session");
873 if (this->status == ISSL_HANDSHAKING_WRITE || this->status == ISSL_HANDSHAKING_READ)
875 // The handshake isn't finished, try to finish it.
877 if (this->status != ISSL_CLOSING)
884 if (this->status == ISSL_HANDSHAKEN)
886 ret = gnutls_record_send(this->sess, sendq.data(), sendq.length());
888 if (ret == (int)sendq.length())
890 SocketEngine::ChangeEventMask(user, FD_WANT_NO_WRITE);
895 sendq = sendq.substr(ret);
896 SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
899 else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
901 SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
906 user->SetError(gnutls_strerror(ret));
915 void TellCiphersAndFingerprint(LocalUser* user)
919 std::string text = "*** You are connected using SSL cipher '";
921 text += UnknownIfNULL(gnutls_kx_get_name(gnutls_kx_get(sess)));
922 text.append("-").append(UnknownIfNULL(gnutls_cipher_get_name(gnutls_cipher_get(sess)))).append("-");
923 text.append(UnknownIfNULL(gnutls_mac_get_name(gnutls_mac_get(sess)))).append("'");
925 if (!certificate->fingerprint.empty())
926 text += " and your SSL fingerprint is " + certificate->fingerprint;
928 user->WriteNotice(text);
932 GnuTLS::Profile* GetProfile() { return profile; }
935 int GnuTLS::X509Credentials::cert_callback(gnutls_session_t sess, const gnutls_datum_t* req_ca_rdn, int nreqs, const gnutls_pk_algorithm_t* sign_algos, int sign_algos_length, cert_cb_last_param_type* st)
937 #ifndef GNUTLS_NEW_CERT_CALLBACK_API
938 st->type = GNUTLS_CRT_X509;
940 st->cert_type = GNUTLS_CRT_X509;
941 st->key_type = GNUTLS_PRIVKEY_X509;
943 StreamSocket* sock = reinterpret_cast<StreamSocket*>(gnutls_transport_get_ptr(sess));
944 GnuTLS::X509Credentials& cred = static_cast<GnuTLSIOHook*>(sock->GetIOHook())->GetProfile()->GetX509Credentials();
946 st->ncerts = cred.certs.size();
947 st->cert.x509 = cred.certs.raw();
948 st->key.x509 = cred.key.get();
954 class GnuTLSIOHookProvider : public refcountbase, public IOHookProvider
956 reference<GnuTLS::Profile> profile;
959 GnuTLSIOHookProvider(Module* mod, reference<GnuTLS::Profile>& prof)
960 : IOHookProvider(mod, "ssl/" + prof->GetName(), IOHookProvider::IOH_SSL)
963 ServerInstance->Modules->AddService(*this);
966 ~GnuTLSIOHookProvider()
968 ServerInstance->Modules->DelService(*this);
971 void OnAccept(StreamSocket* sock, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
973 new GnuTLSIOHook(this, sock, true, profile);
976 void OnConnect(StreamSocket* sock) CXX11_OVERRIDE
978 new GnuTLSIOHook(this, sock, false, profile);
982 class ModuleSSLGnuTLS : public Module
984 typedef std::vector<reference<GnuTLSIOHookProvider> > ProfileList;
986 // First member of the class, gets constructed first and destructed last
987 GnuTLS::Init libinit;
989 ProfileList profiles;
993 // First, store all profiles in a new, temporary container. If no problems occur, swap the two
994 // containers; this way if something goes wrong we can go back and continue using the current profiles,
995 // avoiding unpleasant situations where no new SSL connections are possible.
996 ProfileList newprofiles;
998 ConfigTagList tags = ServerInstance->Config->ConfTags("sslprofile");
999 if (tags.first == tags.second)
1001 // No <sslprofile> tags found, create a profile named "gnutls" from settings in the <gnutls> block
1002 const std::string defname = "gnutls";
1003 ConfigTag* tag = ServerInstance->Config->ConfValue(defname);
1004 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "No <sslprofile> tags found; using settings from the <gnutls> tag");
1008 reference<GnuTLS::Profile> profile(GnuTLS::Profile::Create(defname, tag));
1009 newprofiles.push_back(new GnuTLSIOHookProvider(this, profile));
1011 catch (CoreException& ex)
1013 throw ModuleException("Error while initializing the default SSL profile - " + ex.GetReason());
1017 for (ConfigIter i = tags.first; i != tags.second; ++i)
1019 ConfigTag* tag = i->second;
1020 if (tag->getString("provider") != "gnutls")
1023 std::string name = tag->getString("name");
1026 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring <sslprofile> tag without name at " + tag->getTagLocation());
1030 reference<GnuTLS::Profile> profile;
1033 profile = GnuTLS::Profile::Create(name, tag);
1035 catch (CoreException& ex)
1037 throw ModuleException("Error while initializing SSL profile \"" + name + "\" at " + tag->getTagLocation() + " - " + ex.GetReason());
1040 newprofiles.push_back(new GnuTLSIOHookProvider(this, profile));
1043 // New profiles are ok, begin using them
1044 // Old profiles are deleted when their refcount drops to zero
1045 profiles.swap(newprofiles);
1051 #ifndef GNUTLS_HAS_RND
1052 gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
1056 void init() CXX11_OVERRIDE
1059 ServerInstance->GenRandom = &randhandler;
1062 void OnModuleRehash(User* user, const std::string ¶m) CXX11_OVERRIDE
1071 catch (ModuleException& ex)
1073 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason() + " Not applying settings.");
1079 ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
1082 void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
1084 if(target_type == TYPE_USER)
1086 LocalUser* user = IS_LOCAL(static_cast<User*>(item));
1088 if (user && user->eh.GetIOHook() && user->eh.GetIOHook()->prov->creator == this)
1090 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
1091 // Potentially there could be multiple SSL modules loaded at once on different ports.
1092 ServerInstance->Users->QuitUser(user, "SSL module unloading");
1097 Version GetVersion() CXX11_OVERRIDE
1099 return Version("Provides SSL support for clients", VF_VENDOR);
1102 void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
1104 IOHook* hook = user->eh.GetIOHook();
1105 if (hook && hook->prov->creator == this)
1106 static_cast<GnuTLSIOHook*>(hook)->TellCiphersAndFingerprint(user);
1110 MODULE_INIT(ModuleSSLGnuTLS)