-/* +------------------------------------+\r * | Inspire Internet Relay Chat Daemon |\r * +------------------------------------+\r *\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team\r * See: http://www.inspircd.org/wiki/index.php/Credits\r *\r * This program is free but copyrighted software; see\r * the file COPYING for details.\r *\r * ---------------------------------------------------\r */\r\r#include "inspircd.h"\r\r#include <gnutls/gnutls.h>\r#include <gnutls/x509.h>\r\r#include "inspircd_config.h"\r#include "configreader.h"\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r#include "socket.h"\r#include "hashcomp.h"\r#include "transport.h"\r\r#ifdef WINDOWS\r#pragma comment(lib, "libgnutls-13.lib")\r#undef MAX_DESCRIPTORS\r#define MAX_DESCRIPTORS 10000\r#endif\r\r/* $ModDesc: Provides SSL support for clients */\r/* $CompileFlags: exec("libgnutls-config --cflags") */\r/* $LinkerFlags: rpath("libgnutls-config --libs") exec("libgnutls-config --libs") */\r/* $ModDep: transport.h */\r\r\renum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };\r\rbool isin(int port, const std::vector<int> &portlist)\r{\r for(unsigned int i = 0; i < portlist.size(); i++)\r if(portlist[i] == port)\r return true;\r\r return false;\r}\r\r/** Represents an SSL user's extra data\r */\rclass issl_session : public classbase\r{\rpublic:\r gnutls_session_t sess;\r issl_status status;\r std::string outbuf;\r int inbufoffset;\r char* inbuf;\r int fd;\r};\r\rclass ModuleSSLGnuTLS : public Module\r{\r\r ConfigReader* Conf;\r\r char* dummy;\r\r std::vector<int> listenports;\r\r int inbufsize;\r issl_session sessions[MAX_DESCRIPTORS];\r\r gnutls_certificate_credentials x509_cred;\r gnutls_dh_params dh_params;\r\r std::string keyfile;\r std::string certfile;\r std::string cafile;\r std::string crlfile;\r std::string sslports;\r int dh_bits;\r\r int clientactive;\r\r public:\r\r ModuleSSLGnuTLS(InspIRCd* Me)\r : Module(Me)\r {\r ServerInstance->PublishInterface("InspSocketHook", this);\r\r // Not rehashable...because I cba to reduce all the sizes of existing buffers.\r inbufsize = ServerInstance->Config->NetBufferSize;\r\r gnutls_global_init(); // This must be called once in the program\r\r if(gnutls_certificate_allocate_credentials(&x509_cred) != 0)\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to allocate certificate credentials");\r\r // Guessing return meaning\r if(gnutls_dh_params_init(&dh_params) < 0)\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters");\r\r // Needs the flag as it ignores a plain /rehash\r OnRehash(NULL,"ssl");\r\r // Void return, guess we assume success\r gnutls_certificate_set_dh_params(x509_cred, dh_params);\r }\r\r virtual void OnRehash(userrec* user, const std::string ¶m)\r {\r if(param != "ssl")\r return;\r\r Conf = new ConfigReader(ServerInstance);\r\r for(unsigned int i = 0; i < listenports.size(); i++)\r {\r ServerInstance->Config->DelIOHook(listenports[i]);\r }\r\r listenports.clear();\r clientactive = 0;\r sslports.clear();\r\r for(int i = 0; i < Conf->Enumerate("bind"); i++)\r {\r // For each <bind> tag\r std::string x = Conf->ReadValue("bind", "type", i);\r if(((x.empty()) || (x == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "gnutls"))\r {\r // Get the port we're meant to be listening on with SSL\r std::string port = Conf->ReadValue("bind", "port", i);\r irc::portparser portrange(port, false);\r long portno = -1;\r while ((portno = portrange.GetToken()))\r {\r clientactive++;\r try\r {\r if (ServerInstance->Config->AddIOHook(portno, this))\r {\r listenports.push_back(portno);\r for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++)\r if (ServerInstance->Config->ports[i]->GetPort() == portno)\r ServerInstance->Config->ports[i]->SetDescription("ssl");\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %d", portno);\r sslports.append("*:").append(ConvToStr(portno)).append(";");\r }\r else\r {\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);\r }\r }\r catch (ModuleException &e)\r {\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d: %s. Maybe it's already hooked by the same port on a different IP, or you have an other SSL or similar module loaded?", portno, e.GetReason());\r }\r }\r }\r }\r\r std::string confdir(ServerInstance->ConfigFileName);\r // +1 so we the path ends with a /\r confdir = confdir.substr(0, confdir.find_last_of('/') + 1);\r\r cafile = Conf->ReadValue("gnutls", "cafile", 0);\r crlfile = Conf->ReadValue("gnutls", "crlfile", 0);\r certfile = Conf->ReadValue("gnutls", "certfile", 0);\r keyfile = Conf->ReadValue("gnutls", "keyfile", 0);\r dh_bits = Conf->ReadInteger("gnutls", "dhbits", 0, false);\r\r // Set all the default values needed.\r if (cafile.empty())\r cafile = "ca.pem";\r\r if (crlfile.empty())\r crlfile = "crl.pem";\r\r if (certfile.empty())\r certfile = "cert.pem";\r\r if (keyfile.empty())\r keyfile = "key.pem";\r\r if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))\r dh_bits = 1024;\r\r // Prepend relative paths with the path to the config directory.\r if(cafile[0] != '/')\r cafile = confdir + cafile;\r\r if(crlfile[0] != '/')\r crlfile = confdir + crlfile;\r\r if(certfile[0] != '/')\r certfile = confdir + certfile;\r\r if(keyfile[0] != '/')\r keyfile = confdir + keyfile;\r\r int ret;\r\r if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret));\r\r if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret));\r\r if((ret = gnutls_certificate_set_x509_key_file (x509_cred, certfile.c_str(), keyfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)\r {\r // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException\r throw ModuleException("Unable to load GnuTLS server certificate: " + std::string(gnutls_strerror(ret)));\r }\r\r // This may be on a large (once a day or week) timer eventually.\r GenerateDHParams();\r\r DELETE(Conf);\r }\r\r void GenerateDHParams()\r {\r // Generate Diffie Hellman parameters - for use with DHE\r // kx algorithms. These should be discarded and regenerated\r // once a day, once a week or once a month. Depending on the\r // security requirements.\r\r int ret;\r\r if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));\r }\r\r virtual ~ModuleSSLGnuTLS()\r {\r gnutls_dh_params_deinit(dh_params);\r gnutls_certificate_free_credentials(x509_cred);\r gnutls_global_deinit();\r }\r\r virtual void OnCleanup(int target_type, void* item)\r {\r if(target_type == TYPE_USER)\r {\r userrec* user = (userrec*)item;\r\r if(user->GetExt("ssl", dummy) && isin(user->GetPort(), listenports))\r {\r // User is using SSL, they're a local user, and they're using one of *our* SSL ports.\r // Potentially there could be multiple SSL modules loaded at once on different ports.\r ServerInstance->GlobalCulls.AddItem(user, "SSL module unloading");\r }\r if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))\r {\r ssl_cert* tofree;\r user->GetExt("ssl_cert", tofree);\r delete tofree;\r user->Shrink("ssl_cert");\r }\r }\r }\r\r virtual void OnUnloadModule(Module* mod, const std::string &name)\r {\r if(mod == this)\r {\r for(unsigned int i = 0; i < listenports.size(); i++)\r {\r ServerInstance->Config->DelIOHook(listenports[i]);\r for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)\r if (ServerInstance->Config->ports[j]->GetPort() == listenports[i])\r ServerInstance->Config->ports[j]->SetDescription("plaintext");\r }\r }\r }\r\r virtual Version GetVersion()\r {\r return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);\r }\r\r void Implements(char* List)\r {\r List[I_On005Numeric] = List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;\r List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;\r }\r\r virtual void On005Numeric(std::string &output)\r {\r output.append(" SSL=" + sslports);\r }\r\r virtual char* OnRequest(Request* request)\r {\r ISHRequest* ISR = (ISHRequest*)request;\r if (strcmp("IS_NAME", request->GetId()) == 0)\r {\r return "gnutls";\r }\r else if (strcmp("IS_HOOK", request->GetId()) == 0)\r {\r char* ret = "OK";\r try\r {\r ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;\r }\r catch (ModuleException &e)\r {\r return NULL;\r }\r return ret;\r }\r else if (strcmp("IS_UNHOOK", request->GetId()) == 0)\r {\r return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;\r }\r else if (strcmp("IS_HSDONE", request->GetId()) == 0)\r {\r if (ISR->Sock->GetFd() < 0)\r return (char*)"OK";\r\r issl_session* session = &sessions[ISR->Sock->GetFd()];\r return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : (char*)"OK";\r }\r else if (strcmp("IS_ATTACH", request->GetId()) == 0)\r {\r if (ISR->Sock->GetFd() > -1)\r {\r issl_session* session = &sessions[ISR->Sock->GetFd()];\r if (session->sess)\r {\r if ((Extensible*)ServerInstance->FindDescriptor(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock))\r {\r VerifyCertificate(session, (InspSocket*)ISR->Sock);\r return "OK";\r }\r }\r }\r }\r return NULL;\r }\r\r\r virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)\r {\r issl_session* session = &sessions[fd];\r\r session->fd = fd;\r session->inbuf = new char[inbufsize];\r session->inbufoffset = 0;\r\r gnutls_init(&session->sess, GNUTLS_SERVER);\r\r gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.\r gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);\r gnutls_dh_set_prime_bits(session->sess, dh_bits);\r\r /* This is an experimental change to avoid a warning on 64bit systems about casting between integer and pointer of different sizes\r * This needs testing, but it's easy enough to rollback if need be\r * Old: gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.\r * New: gnutls_transport_set_ptr(session->sess, &fd); // Give gnutls the fd for the socket.\r *\r * With testing this seems to...not work :/\r */\r\r gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.\r\r gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.\r\r Handshake(session);\r }\r\r virtual void OnRawSocketConnect(int fd)\r {\r issl_session* session = &sessions[fd];\r\r session->fd = fd;\r session->inbuf = new char[inbufsize];\r session->inbufoffset = 0;\r\r gnutls_init(&session->sess, GNUTLS_CLIENT);\r\r gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.\r gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);\r gnutls_dh_set_prime_bits(session->sess, dh_bits);\r gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.\r\r Handshake(session);\r }\r\r virtual void OnRawSocketClose(int fd)\r {\r CloseSession(&sessions[fd]);\r\r EventHandler* user = ServerInstance->SE->GetRef(fd);\r\r if ((user) && (user->GetExt("ssl_cert", dummy)))\r {\r ssl_cert* tofree;\r user->GetExt("ssl_cert", tofree);\r delete tofree;\r user->Shrink("ssl_cert");\r }\r }\r\r virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)\r {\r issl_session* session = &sessions[fd];\r\r if (!session->sess)\r {\r readresult = 0;\r CloseSession(session);\r return 1;\r }\r\r if (session->status == ISSL_HANDSHAKING_READ)\r {\r // The handshake isn't finished, try to finish it.\r\r if(!Handshake(session))\r {\r // Couldn't resume handshake.\r return -1;\r }\r }\r else if (session->status == ISSL_HANDSHAKING_WRITE)\r {\r errno = EAGAIN;\r return -1;\r }\r\r // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.\r\r if (session->status == ISSL_HANDSHAKEN)\r {\r // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.\r // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.\r int ret = gnutls_record_recv(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);\r\r if (ret == 0)\r {\r // Client closed connection.\r readresult = 0;\r CloseSession(session);\r return 1;\r }\r else if (ret < 0)\r {\r if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)\r {\r errno = EAGAIN;\r return -1;\r }\r else\r {\r readresult = 0;\r CloseSession(session);\r }\r }\r else\r {\r // Read successfully 'ret' bytes into inbuf + inbufoffset\r // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'\r // 'buffer' is 'count' long\r\r unsigned int length = ret + session->inbufoffset;\r\r if(count <= length)\r {\r memcpy(buffer, session->inbuf, count);\r // Move the stuff left in inbuf to the beginning of it\r memcpy(session->inbuf, session->inbuf + count, (length - count));\r // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.\r session->inbufoffset = length - count;\r // Insp uses readresult as the count of how much data there is in buffer, so:\r readresult = count;\r }\r else\r {\r // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.\r memcpy(buffer, session->inbuf, length);\r // Zero the offset, as there's nothing there..\r session->inbufoffset = 0;\r // As above\r readresult = length;\r }\r }\r }\r else if(session->status == ISSL_CLOSING)\r readresult = 0;\r\r return 1;\r }\r\r virtual int OnRawSocketWrite(int fd, const char* buffer, int count)\r {\r if (!count)\r return 0;\r\r issl_session* session = &sessions[fd];\r const char* sendbuffer = buffer;\r\r if (!session->sess)\r {\r ServerInstance->Log(DEBUG,"No session");\r CloseSession(session);\r return 1;\r }\r\r session->outbuf.append(sendbuffer, count);\r sendbuffer = session->outbuf.c_str();\r count = session->outbuf.size();\r\r if (session->status == ISSL_HANDSHAKING_WRITE)\r {\r // The handshake isn't finished, try to finish it.\r ServerInstance->Log(DEBUG,"Finishing handshake");\r Handshake(session);\r errno = EAGAIN;\r return -1;\r }\r\r int ret = 0;\r\r if (session->status == ISSL_HANDSHAKEN)\r {\r ServerInstance->Log(DEBUG,"Send record");\r ret = gnutls_record_send(session->sess, sendbuffer, count);\r ServerInstance->Log(DEBUG,"Return: %d", ret);\r\r if (ret == 0)\r {\r CloseSession(session);\r }\r else if (ret < 0)\r {\r if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)\r {\r ServerInstance->Log(DEBUG,"Not egain or interrupt, close session");\r CloseSession(session);\r }\r else\r {\r ServerInstance->Log(DEBUG,"Again please");\r errno = EAGAIN;\r return -1;\r }\r }\r else\r {\r ServerInstance->Log(DEBUG,"Trim buffer");\r session->outbuf = session->outbuf.substr(ret);\r }\r }\r\r /* Who's smart idea was it to return 1 when we havent written anything?\r * This fucks the buffer up in InspSocket :p\r */\r return ret < 1 ? 0 : ret;\r }\r\r // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection\r virtual void OnWhois(userrec* source, userrec* dest)\r {\r if (!clientactive)\r return;\r\r // Bugfix, only send this numeric for *our* SSL users\r if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) && isin(dest->GetPort(), listenports)))\r {\r ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);\r }\r }\r\r virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname, bool displayable)\r {\r // check if the linking module wants to know about OUR metadata\r if(extname == "ssl")\r {\r // check if this user has an swhois field to send\r if(user->GetExt(extname, dummy))\r {\r // call this function in the linking module, let it format the data how it\r // sees fit, and send it on its way. We dont need or want to know how.\r proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON");\r }\r }\r }\r\r virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)\r {\r // check if its our metadata key, and its associated with a user\r if ((target_type == TYPE_USER) && (extname == "ssl"))\r {\r userrec* dest = (userrec*)target;\r // if they dont already have an ssl flag, accept the remote server's\r if (!dest->GetExt(extname, dummy))\r {\r dest->Extend(extname, "ON");\r }\r }\r }\r\r bool Handshake(issl_session* session)\r {\r int ret = gnutls_handshake(session->sess);\r\r if (ret < 0)\r {\r if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)\r {\r // Handshake needs resuming later, read() or write() would have blocked.\r\r if(gnutls_record_get_direction(session->sess) == 0)\r {\r // gnutls_handshake() wants to read() again.\r session->status = ISSL_HANDSHAKING_READ;\r }\r else\r {\r // gnutls_handshake() wants to write() again.\r session->status = ISSL_HANDSHAKING_WRITE;\r MakePollWrite(session);\r }\r }\r else\r {\r // Handshake failed.\r CloseSession(session);\r session->status = ISSL_CLOSING;\r }\r\r return false;\r }\r else\r {\r // Handshake complete.\r // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.\r userrec* extendme = ServerInstance->FindDescriptor(session->fd);\r if (extendme)\r {\r if (!extendme->GetExt("ssl", dummy))\r extendme->Extend("ssl", "ON");\r }\r\r // Change the seesion state\r session->status = ISSL_HANDSHAKEN;\r\r // Finish writing, if any left\r MakePollWrite(session);\r\r return true;\r }\r }\r\r virtual void OnPostConnect(userrec* user)\r {\r // This occurs AFTER OnUserConnect so we can be sure the\r // protocol module has propogated the NICK message.\r if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))\r {\r // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.\r std::deque<std::string>* metadata = new std::deque<std::string>;\r metadata->push_back(user->nick);\r metadata->push_back("ssl"); // The metadata id\r metadata->push_back("ON"); // The value to send\r Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");\r event->Send(ServerInstance); // Trigger the event. We don't care what module picks it up.\r DELETE(event);\r DELETE(metadata);\r\r VerifyCertificate(&sessions[user->GetFd()],user);\r if (sessions[user->GetFd()].sess)\r {\r std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->GetFd()].sess));\r cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->GetFd()].sess))).append("-");\r cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->GetFd()].sess)));\r user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick, cipher.c_str());\r }\r }\r }\r\r void MakePollWrite(issl_session* session)\r {\r OnRawSocketWrite(session->fd, NULL, 0);\r }\r\r void CloseSession(issl_session* session)\r {\r if(session->sess)\r {\r gnutls_bye(session->sess, GNUTLS_SHUT_WR);\r gnutls_deinit(session->sess);\r }\r\r if(session->inbuf)\r {\r delete[] session->inbuf;\r }\r\r session->outbuf.clear();\r session->inbuf = NULL;\r session->sess = NULL;\r session->status = ISSL_NONE;\r }\r\r void VerifyCertificate(issl_session* session, Extensible* user)\r {\r if (!session->sess || !user)\r return;\r\r unsigned int status;\r const gnutls_datum_t* cert_list;\r int ret;\r unsigned int cert_list_size;\r gnutls_x509_crt_t cert;\r char name[MAXBUF];\r unsigned char digest[MAXBUF];\r size_t digest_size = sizeof(digest);\r size_t name_size = sizeof(name);\r ssl_cert* certinfo = new ssl_cert;\r\r user->Extend("ssl_cert",certinfo);\r\r /* This verification function uses the trusted CAs in the credentials\r * structure. So you must have installed one or more CA certificates.\r */\r ret = gnutls_certificate_verify_peers2(session->sess, &status);\r\r if (ret < 0)\r {\r certinfo->data.insert(std::make_pair("error",std::string(gnutls_strerror(ret))));\r return;\r }\r\r if (status & GNUTLS_CERT_INVALID)\r {\r certinfo->data.insert(std::make_pair("invalid",ConvToStr(1)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("invalid",ConvToStr(0)));\r }\r if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)\r {\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));\r }\r if (status & GNUTLS_CERT_REVOKED)\r {\r certinfo->data.insert(std::make_pair("revoked",ConvToStr(1)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("revoked",ConvToStr(0)));\r }\r if (status & GNUTLS_CERT_SIGNER_NOT_CA)\r {\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));\r }\r\r /* Up to here the process is the same for X.509 certificates and\r * OpenPGP keys. From now on X.509 certificates are assumed. This can\r * be easily extended to work with openpgp keys as well.\r */\r if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)\r {\r certinfo->data.insert(std::make_pair("error","No X509 keys sent"));\r return;\r }\r\r ret = gnutls_x509_crt_init(&cert);\r if (ret < 0)\r {\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));\r return;\r }\r\r cert_list_size = 0;\r cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);\r if (cert_list == NULL)\r {\r certinfo->data.insert(std::make_pair("error","No certificate was found"));\r return;\r }\r\r /* This is not a real world example, since we only check the first\r * certificate in the given chain.\r */\r\r ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);\r if (ret < 0)\r {\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));\r return;\r }\r\r gnutls_x509_crt_get_dn(cert, name, &name_size);\r\r certinfo->data.insert(std::make_pair("dn",name));\r\r gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);\r\r certinfo->data.insert(std::make_pair("issuer",name));\r\r if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0)\r {\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("fingerprint",irc::hex(digest, digest_size)));\r }\r\r /* Beware here we do not check for errors.\r */\r if ((gnutls_x509_crt_get_expiration_time(cert) < time(0)) || (gnutls_x509_crt_get_activation_time(cert) > time(0)))\r {\r certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));\r }\r\r gnutls_x509_crt_deinit(cert);\r\r return;\r }\r\r};\r\rMODULE_INIT(ModuleSSLGnuTLS);\r\r
\ No newline at end of file
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
+ * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
+ *
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "inspircd.h"
+#include <gnutls/gnutls.h>
+#include <gnutls/x509.h>
+#include <gcrypt.h>
+#include "ssl.h"
+#include "m_cap.h"
+
+/* $ModDesc: Provides SSL support for clients */
+/* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") */
+/* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") -lgcrypt */
+
+enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
+
+static std::vector<gnutls_x509_crt_t> x509_certs;
+static gnutls_x509_privkey_t x509_key;
+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, gnutls_retr_st * st) {
+
+ st->type = GNUTLS_CRT_X509;
+ st->ncerts = x509_certs.size();
+ st->cert.x509 = &x509_certs[0];
+ st->key.x509 = x509_key;
+ st->deinit_all = 0;
+
+ return 0;
+}
+
+static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t user_wrap, void* buffer, size_t size)
+{
+ StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
+ if (user->GetEventMask() & FD_READ_WILL_BLOCK)
+ {
+ errno = EAGAIN;
+ return -1;
+ }
+ int rv = recv(user->GetFd(), reinterpret_cast<char *>(buffer), size, 0);
+ if (rv < (int)size)
+ ServerInstance->SE->ChangeEventMask(user, FD_READ_WILL_BLOCK);
+ return rv;
+}
+
+static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t user_wrap, const void* buffer, size_t size)
+{
+ StreamSocket* user = reinterpret_cast<StreamSocket*>(user_wrap);
+ if (user->GetEventMask() & FD_WRITE_WILL_BLOCK)
+ {
+ errno = EAGAIN;
+ return -1;
+ }
+ int rv = send(user->GetFd(), reinterpret_cast<const char *>(buffer), size, 0);
+ if (rv < (int)size)
+ ServerInstance->SE->ChangeEventMask(user, FD_WRITE_WILL_BLOCK);
+ return rv;
+}
+
+class RandGen : public HandlerBase2<void, char*, size_t>
+{
+ public:
+ RandGen() {}
+ void Call(char* buffer, size_t len)
+ {
+ gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
+ }
+};
+
+/** Represents an SSL user's extra data
+ */
+class issl_session
+{
+public:
+ gnutls_session_t sess;
+ issl_status status;
+ reference<ssl_cert> cert;
+ issl_session() : sess(NULL) {}
+};
+
+class CommandStartTLS : public SplitCommand
+{
+ public:
+ bool enabled;
+ CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS")
+ {
+ enabled = true;
+ works_before_reg = true;
+ }
+
+ CmdResult HandleLocal(const std::vector<std::string> ¶meters, LocalUser *user)
+ {
+ if (!enabled)
+ {
+ user->WriteNumeric(691, "%s :STARTTLS is not enabled", user->nick.c_str());
+ return CMD_FAILURE;
+ }
+
+ if (user->registered == REG_ALL)
+ {
+ user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration is complete", user->nick.c_str());
+ }
+ else
+ {
+ if (!user->eh.GetIOHook())
+ {
+ user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
+ /* We need to flush the write buffer prior to adding the IOHook,
+ * otherwise we'll be sending this line inside the SSL session - which
+ * won't start its handshake until the client gets this line. Currently,
+ * we assume the write will not block here; this is usually safe, as
+ * STARTTLS is sent very early on in the registration phase, where the
+ * user hasn't built up much sendq. Handling a blocked write here would
+ * be very annoying.
+ */
+ user->eh.DoWrite();
+ user->eh.AddIOHook(creator);
+ creator->OnStreamSocketAccept(&user->eh, NULL, NULL);
+ }
+ else
+ user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
+ }
+
+ return CMD_FAILURE;
+ }
+};
+
+class ModuleSSLGnuTLS : public Module
+{
+ issl_session* sessions;
+
+ gnutls_certificate_credentials x509_cred;
+ gnutls_dh_params dh_params;
+ gnutls_digest_algorithm_t hash;
+
+ std::string sslports;
+ int dh_bits;
+
+ bool cred_alloc;
+
+ RandGen randhandler;
+ CommandStartTLS starttls;
+
+ GenericCap capHandler;
+ ServiceProvider iohook;
+ public:
+
+ ModuleSSLGnuTLS()
+ : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK)
+ {
+ sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
+
+ gnutls_global_init(); // This must be called once in the program
+ gnutls_x509_privkey_init(&x509_key);
+
+ cred_alloc = false;
+ }
+
+ void init()
+ {
+ // Needs the flag as it ignores a plain /rehash
+ OnModuleRehash(NULL,"ssl");
+
+ ServerInstance->GenRandom = &randhandler;
+
+ // Void return, guess we assume success
+ gnutls_certificate_set_dh_params(x509_cred, dh_params);
+ Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect,
+ I_OnEvent, I_OnHookIO };
+ ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
+
+ ServerInstance->Modules->AddService(iohook);
+ ServerInstance->AddCommand(&starttls);
+ }
+
+ void OnRehash(User* user)
+ {
+ sslports.clear();
+
+ ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
+ starttls.enabled = Conf->getBool("starttls", true);
+
+ if (Conf->getBool("showports", true))
+ {
+ for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+ {
+ ListenSocket* port = ServerInstance->ports[i];
+ if (port->bind_tag->getString("ssl") != "gnutls")
+ continue;
+
+ const std::string& portid = port->bind_desc;
+ ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
+
+ if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
+ sslports.append(portid).append(";");
+ }
+
+ if (!sslports.empty())
+ sslports.erase(sslports.end() - 1);
+ }
+ }
+
+ void OnModuleRehash(User* user, const std::string ¶m)
+ {
+ if(param != "ssl")
+ return;
+
+ std::string keyfile;
+ std::string certfile;
+ std::string cafile;
+ std::string crlfile;
+ OnRehash(user);
+
+ ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
+
+ cafile = Conf->getString("cafile", "conf/ca.pem");
+ crlfile = Conf->getString("crlfile", "conf/crl.pem");
+ certfile = Conf->getString("certfile", "conf/cert.pem");
+ keyfile = Conf->getString("keyfile", "conf/key.pem");
+ dh_bits = Conf->getInt("dhbits");
+ std::string hashname = Conf->getString("hash", "md5");
+
+ if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
+ dh_bits = 1024;
+
+ if (hashname == "md5")
+ hash = GNUTLS_DIG_MD5;
+ else if (hashname == "sha1")
+ hash = GNUTLS_DIG_SHA1;
+ else
+ throw ModuleException("Unknown hash type " + hashname);
+
+
+ int ret;
+
+ if (cred_alloc)
+ {
+ // Deallocate the old credentials
+ gnutls_dh_params_deinit(dh_params);
+ gnutls_certificate_free_credentials(x509_cred);
+
+ for(unsigned int i=0; i < x509_certs.size(); i++)
+ gnutls_x509_crt_deinit(x509_certs[i]);
+ x509_certs.clear();
+ }
+ else
+ cred_alloc = true;
+
+ if((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0)
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret));
+
+ if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
+ 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));
+
+ if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
+ 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));
+
+ FileReader reader;
+
+ reader.LoadFile(certfile);
+ std::string cert_string = reader.Contents();
+ gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), cert_string.length() };
+
+ reader.LoadFile(keyfile);
+ std::string key_string = reader.Contents();
+ gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), key_string.length() };
+
+ // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
+ unsigned int certcount = Conf->getInt("certcount", 3);
+ x509_certs.resize(certcount);
+ ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
+ if (ret < 0)
+ throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + std::string(gnutls_strerror(ret)));
+ x509_certs.resize(certcount);
+
+ if((ret = gnutls_x509_privkey_import(x509_key, &key_datum, GNUTLS_X509_FMT_PEM)) < 0)
+ throw ModuleException("Unable to load GnuTLS server private key (" + keyfile + "): " + std::string(gnutls_strerror(ret)));
+
+ if((ret = gnutls_certificate_set_x509_key(x509_cred, &x509_certs[0], certcount, x509_key)) < 0)
+ throw ModuleException("Unable to set GnuTLS cert/key pair: " + std::string(gnutls_strerror(ret)));
+
+ gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
+
+ if((ret = gnutls_dh_params_init(&dh_params)) < 0)
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
+
+ // This may be on a large (once a day or week) timer eventually.
+ GenerateDHParams();
+ }
+
+ void GenerateDHParams()
+ {
+ // Generate Diffie Hellman parameters - for use with DHE
+ // kx algorithms. These should be discarded and regenerated
+ // once a day, once a week or once a month. Depending on the
+ // security requirements.
+
+ int ret;
+
+ if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
+ }
+
+ ~ModuleSSLGnuTLS()
+ {
+ for(unsigned int i=0; i < x509_certs.size(); i++)
+ gnutls_x509_crt_deinit(x509_certs[i]);
+ x509_certs.clear();
+ gnutls_x509_privkey_deinit(x509_key);
+ if (cred_alloc)
+ {
+ gnutls_dh_params_deinit(dh_params);
+ gnutls_certificate_free_credentials(x509_cred);
+ }
+ gnutls_global_deinit();
+ delete[] sessions;
+ ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
+ }
+
+ void OnCleanup(int target_type, void* item)
+ {
+ if(target_type == TYPE_USER)
+ {
+ LocalUser* user = IS_LOCAL(static_cast<User*>(item));
+
+ if (user && user->eh.GetIOHook() == this)
+ {
+ // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
+ // Potentially there could be multiple SSL modules loaded at once on different ports.
+ ServerInstance->Users->QuitUser(user, "SSL module unloading");
+ }
+ }
+ }
+
+ Version GetVersion()
+ {
+ return Version("Provides SSL support for clients", VF_VENDOR);
+ }
+
+
+ void On005Numeric(std::string &output)
+ {
+ if (!sslports.empty())
+ output.append(" SSL=" + sslports);
+ if (starttls.enabled)
+ output.append(" STARTTLS");
+ }
+
+ void OnHookIO(StreamSocket* user, ListenSocket* lsb)
+ {
+ if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls")
+ {
+ /* Hook the user with our module */
+ user->AddIOHook(this);
+ }
+ }
+
+ void OnRequest(Request& request)
+ {
+ if (strcmp("GET_SSL_CERT", request.id) == 0)
+ {
+ SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
+ int fd = req.sock->GetFd();
+ issl_session* session = &sessions[fd];
+
+ req.cert = session->cert;
+ }
+ }
+
+ void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
+ {
+ int fd = user->GetFd();
+ issl_session* session = &sessions[fd];
+
+ /* For STARTTLS: Don't try and init a session on a socket that already has a session */
+ if (session->sess)
+ return;
+
+ gnutls_init(&session->sess, GNUTLS_SERVER);
+
+ gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
+ gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(session->sess, dh_bits);
+
+ gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
+ gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
+ gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
+
+ gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
+
+ Handshake(session, user);
+ }
+
+ void OnStreamSocketConnect(StreamSocket* user)
+ {
+ issl_session* session = &sessions[user->GetFd()];
+
+ gnutls_init(&session->sess, GNUTLS_CLIENT);
+
+ gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
+ gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
+ gnutls_dh_set_prime_bits(session->sess, dh_bits);
+ gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(user));
+ gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
+ gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
+
+ Handshake(session, user);
+ }
+
+ void OnStreamSocketClose(StreamSocket* user)
+ {
+ CloseSession(&sessions[user->GetFd()]);
+ }
+
+ int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
+ {
+ issl_session* session = &sessions[user->GetFd()];
+
+ if (!session->sess)
+ {
+ CloseSession(session);
+ user->SetError("No SSL session");
+ return -1;
+ }
+
+ if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE)
+ {
+ // The handshake isn't finished, try to finish it.
+
+ if(!Handshake(session, user))
+ {
+ if (session->status != ISSL_CLOSING)
+ return 0;
+ return -1;
+ }
+ }
+
+ // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
+
+ if (session->status == ISSL_HANDSHAKEN)
+ {
+ char* buffer = ServerInstance->GetReadBuffer();
+ size_t bufsiz = ServerInstance->Config->NetBufferSize;
+ int ret = gnutls_record_recv(session->sess, buffer, bufsiz);
+ if (ret > 0)
+ {
+ recvq.append(buffer, ret);
+ return 1;
+ }
+ else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
+ {
+ return 0;
+ }
+ else if (ret == 0)
+ {
+ user->SetError("SSL Connection closed");
+ CloseSession(session);
+ return -1;
+ }
+ else
+ {
+ user->SetError(gnutls_strerror(ret));
+ CloseSession(session);
+ return -1;
+ }
+ }
+ else if (session->status == ISSL_CLOSING)
+ return -1;
+
+ return 0;
+ }
+
+ int OnStreamSocketWrite(StreamSocket* user, std::string& sendq)
+ {
+ issl_session* session = &sessions[user->GetFd()];
+
+ if (!session->sess)
+ {
+ CloseSession(session);
+ user->SetError("No SSL session");
+ return -1;
+ }
+
+ if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ)
+ {
+ // The handshake isn't finished, try to finish it.
+ Handshake(session, user);
+ if (session->status != ISSL_CLOSING)
+ return 0;
+ return -1;
+ }
+
+ int ret = 0;
+
+ if (session->status == ISSL_HANDSHAKEN)
+ {
+ ret = gnutls_record_send(session->sess, sendq.data(), sendq.length());
+
+ if (ret == (int)sendq.length())
+ {
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE);
+ return 1;
+ }
+ else if (ret > 0)
+ {
+ sendq = sendq.substr(ret);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
+ {
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else // (ret < 0)
+ {
+ user->SetError(gnutls_strerror(ret));
+ CloseSession(session);
+ return -1;
+ }
+ }
+
+ return 0;
+ }
+
+ bool Handshake(issl_session* session, StreamSocket* user)
+ {
+ int ret = gnutls_handshake(session->sess);
+
+ if (ret < 0)
+ {
+ if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
+ {
+ // Handshake needs resuming later, read() or write() would have blocked.
+
+ if(gnutls_record_get_direction(session->sess) == 0)
+ {
+ // gnutls_handshake() wants to read() again.
+ session->status = ISSL_HANDSHAKING_READ;
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+ }
+ else
+ {
+ // gnutls_handshake() wants to write() again.
+ session->status = ISSL_HANDSHAKING_WRITE;
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
+ }
+ }
+ else
+ {
+ user->SetError(std::string("Handshake Failed - ") + gnutls_strerror(ret));
+ CloseSession(session);
+ session->status = ISSL_CLOSING;
+ }
+
+ return false;
+ }
+ else
+ {
+ // Change the seesion state
+ session->status = ISSL_HANDSHAKEN;
+
+ VerifyCertificate(session,user);
+
+ // Finish writing, if any left
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
+
+ return true;
+ }
+ }
+
+ void OnUserConnect(LocalUser* user)
+ {
+ if (user->eh.GetIOHook() == this)
+ {
+ if (sessions[user->eh.GetFd()].sess)
+ {
+ ssl_cert* cert = sessions[user->eh.GetFd()].cert;
+ std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->eh.GetFd()].sess));
+ cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->eh.GetFd()].sess))).append("-");
+ cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->eh.GetFd()].sess)));
+ if (cert->fingerprint.empty())
+ user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), cipher.c_str());
+ else
+ user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
+ " and your SSL fingerprint is %s", user->nick.c_str(), cipher.c_str(), cert->fingerprint.c_str());
+ }
+ }
+ }
+
+ void CloseSession(issl_session* session)
+ {
+ if (session->sess)
+ {
+ gnutls_bye(session->sess, GNUTLS_SHUT_WR);
+ gnutls_deinit(session->sess);
+ }
+ session->sess = NULL;
+ session->cert = NULL;
+ session->status = ISSL_NONE;
+ }
+
+ void VerifyCertificate(issl_session* session, StreamSocket* user)
+ {
+ if (!session->sess || !user)
+ return;
+
+ unsigned int status;
+ const gnutls_datum_t* cert_list;
+ int ret;
+ unsigned int cert_list_size;
+ gnutls_x509_crt_t cert;
+ char name[MAXBUF];
+ unsigned char digest[MAXBUF];
+ size_t digest_size = sizeof(digest);
+ size_t name_size = sizeof(name);
+ ssl_cert* certinfo = new ssl_cert;
+ session->cert = certinfo;
+
+ /* This verification function uses the trusted CAs in the credentials
+ * structure. So you must have installed one or more CA certificates.
+ */
+ ret = gnutls_certificate_verify_peers2(session->sess, &status);
+
+ if (ret < 0)
+ {
+ certinfo->error = std::string(gnutls_strerror(ret));
+ return;
+ }
+
+ certinfo->invalid = (status & GNUTLS_CERT_INVALID);
+ certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
+ certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
+ certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
+
+ /* Up to here the process is the same for X.509 certificates and
+ * OpenPGP keys. From now on X.509 certificates are assumed. This can
+ * be easily extended to work with openpgp keys as well.
+ */
+ if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
+ {
+ certinfo->error = "No X509 keys sent";
+ return;
+ }
+
+ ret = gnutls_x509_crt_init(&cert);
+ if (ret < 0)
+ {
+ certinfo->error = gnutls_strerror(ret);
+ return;
+ }
+
+ cert_list_size = 0;
+ cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
+ if (cert_list == NULL)
+ {
+ certinfo->error = "No certificate was found";
+ goto info_done_dealloc;
+ }
+
+ /* This is not a real world example, since we only check the first
+ * certificate in the given chain.
+ */
+
+ ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
+ if (ret < 0)
+ {
+ certinfo->error = gnutls_strerror(ret);
+ goto info_done_dealloc;
+ }
+
+ gnutls_x509_crt_get_dn(cert, name, &name_size);
+ certinfo->dn = name;
+
+ gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
+ certinfo->issuer = name;
+
+ if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
+ {
+ certinfo->error = gnutls_strerror(ret);
+ }
+ else
+ {
+ certinfo->fingerprint = irc::hex(digest, digest_size);
+ }
+
+ /* Beware here we do not check for errors.
+ */
+ if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
+ {
+ certinfo->error = "Not activated, or expired certificate";
+ }
+
+info_done_dealloc:
+ gnutls_x509_crt_deinit(cert);
+ }
+
+ void OnEvent(Event& ev)
+ {
+ if (starttls.enabled)
+ capHandler.HandleEvent(ev);
+ }
+};
+
+MODULE_INIT(ModuleSSLGnuTLS)
projects / user / henk / code / inspircd.git / blobdiff