X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fextra%2Fm_ssl_gnutls.cpp;h=df3709f10a6d457100bf4103701ba1d65374a809;hb=e77259697ecfc82c58ba358a1efe25f288414c7e;hp=adbd48fb64dcf44ebb74c8a63dde347d7a3ce6bc;hpb=dd9ba46a3c4daa650ae080a73a650521b1f5fcf4;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/extra/m_ssl_gnutls.cpp b/src/modules/extra/m_ssl_gnutls.cpp index adbd48fb6..df3709f10 100644 --- a/src/modules/extra/m_ssl_gnutls.cpp +++ b/src/modules/extra/m_ssl_gnutls.cpp @@ -2,8 +2,8 @@ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * - * InspIRCd: (C) 2002-2008 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits + * InspIRCd: (C) 2002-2010 InspIRCd Development Team + * See: http://wiki.inspircd.org/Credits * * This program is free but copyrighted software; see * the file COPYING for details. @@ -14,7 +14,7 @@ #include "inspircd.h" #include #include -#include "transport.h" +#include "ssl.h" #include "m_cap.h" #ifdef WINDOWS @@ -22,69 +22,94 @@ #endif /* $ModDesc: Provides SSL support for clients */ -/* $CompileFlags: exec("libgnutls-config --cflags") */ -/* $LinkerFlags: rpath("libgnutls-config --libs") exec("libgnutls-config --libs") */ -/* $ModDep: transport.h */ -/* $CopyInstall: conf/key.pem $(CONPATH) */ -/* $CopyInstall: conf/cert.pem $(CONPATH) */ +/* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") */ +/* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") */ +/* $CopyInstall: conf/key.pem $(CONPATH) -m 0400 -o $(INSTUID) */ +/* $CopyInstall: conf/cert.pem $(CONPATH) -m 0444 */ enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED }; -bool isin(const std::string &host, int port, const std::vector &portlist) -{ - if (std::find(portlist.begin(), portlist.end(), "*:" + ConvToStr(port)) != portlist.end()) - return true; +static gnutls_x509_crt_t x509_cert; +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) { - if (std::find(portlist.begin(), portlist.end(), ":" + ConvToStr(port)) != portlist.end()) - return true; + st->type = GNUTLS_CRT_X509; + st->ncerts = 1; + st->cert.x509 = &x509_cert; + st->key.x509 = x509_key; + st->deinit_all = 0; - return std::find(portlist.begin(), portlist.end(), host + ":" + ConvToStr(port)) != portlist.end(); + return 0; } -/** Represents an SSL user's extra data - */ -class issl_session : public classbase +static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t user_wrap, void* buffer, size_t size) { -public: - issl_session() + StreamSocket* user = reinterpret_cast(user_wrap); + if (user->GetEventMask() & FD_READ_WILL_BLOCK) + { + errno = EAGAIN; + return -1; + } + int rv = recv(user->GetFd(), 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(user_wrap); + if (user->GetEventMask() & FD_WRITE_WILL_BLOCK) { - sess = NULL; + errno = EAGAIN; + return -1; } + int rv = send(user->GetFd(), buffer, size, 0); + if (rv < (int)size) + ServerInstance->SE->ChangeEventMask(user, FD_WRITE_WILL_BLOCK); + return rv; +} +/** Represents an SSL user's extra data + */ +class issl_session +{ +public: gnutls_session_t sess; issl_status status; - std::string outbuf; - int inbufoffset; - char* inbuf; - int fd; + reference cert; + issl_session() : sess(NULL) {} }; -class CommandStartTLS : public Command +class CommandStartTLS : public SplitCommand { - Module* Caller; public: - /* Command 'dalinfo', takes no parameters and needs no special modes */ - CommandStartTLS (InspIRCd* Instance, Module* mod) : Command(Instance,"STARTTLS", 0, 0, true), Caller(mod) + CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS") { - this->source = "m_ssl_gnutls.so"; + works_before_reg = true; } - CmdResult Handle (const std::vector ¶meters, User *user) + CmdResult HandleLocal(const std::vector ¶meters, LocalUser *user) { - if (user->registered == REG_ALL) + /* changed from == REG_ALL to catch clients sending STARTTLS + * after NICK and USER but before OnUserConnect completes and + * give a proper error message (see bug #645) - dz + */ + if (user->registered != REG_NONE) { - ServerInstance->Users->QuitUser(user, "STARTTLS not allowed after client registration"); + user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration has started", user->nick.c_str()); } else { - if (!user->GetIOHook()) + if (!user->eh.GetIOHook()) { user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str()); - user->AddIOHook(Caller); - Caller->OnRawSocketAccept(user->GetFd(), user->GetIPString(), user->GetPort()); + user->eh.AddIOHook(creator); + creator->OnStreamSocketAccept(&user->eh, NULL, NULL); } else - user->WriteNumeric(671, "%s :STARTTLS failure", user->nick.c_str()); + user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str()); } return CMD_FAILURE; @@ -93,14 +118,6 @@ class CommandStartTLS : public Command class ModuleSSLGnuTLS : public Module { - - ConfigReader* Conf; - - char* dummy; - - std::vector listenports; - - int inbufsize; issl_session* sessions; gnutls_certificate_credentials x509_cred; @@ -108,136 +125,101 @@ class ModuleSSLGnuTLS : public Module std::string keyfile; std::string certfile; + std::string cafile; std::string crlfile; std::string sslports; int dh_bits; - int clientactive; bool cred_alloc; - CommandStartTLS* starttls; + CommandStartTLS starttls; + GenericCap capHandler; + ServiceProvider iohook; public: - ModuleSSLGnuTLS(InspIRCd* Me) - : Module(Me) + ModuleSSLGnuTLS() + : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK) { - ServerInstance->Modules->PublishInterface("BufferedSocketHook", this); - sessions = new issl_session[ServerInstance->SE->GetMaxFds()]; - // Not rehashable...because I cba to reduce all the sizes of existing buffers. - inbufsize = ServerInstance->Config->NetBufferSize; - gnutls_global_init(); // This must be called once in the program + gnutls_x509_crt_init(&x509_cert); + gnutls_x509_privkey_init(&x509_key); cred_alloc = false; + } + + void init() + { // Needs the flag as it ignores a plain /rehash - OnRehash(NULL,"ssl"); + OnModuleRehash(NULL,"ssl"); // Void return, guess we assume success gnutls_certificate_set_dh_params(x509_cred, dh_params); - Implementation eventlist[] = { I_On005Numeric, I_OnRawSocketConnect, I_OnRawSocketAccept, I_OnRawSocketClose, I_OnRawSocketRead, I_OnRawSocketWrite, I_OnCleanup, - I_OnBufferFlushed, I_OnRequest, I_OnSyncUserMetaData, I_OnDecodeMetaData, I_OnUnloadModule, I_OnRehash, I_OnWhois, I_OnPostConnect, I_OnEvent, I_OnHookUserIO }; - ServerInstance->Modules->Attach(eventlist, this, 17); + Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect, + I_OnEvent, I_OnHookIO }; + ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); - starttls = new CommandStartTLS(ServerInstance, this); - ServerInstance->AddCommand(starttls); + ServerInstance->Modules->AddService(iohook); + ServerInstance->AddCommand(&starttls); } - virtual void OnRehash(User* user, const std::string ¶m) + void OnRehash(User* user) { - Conf = new ConfigReader(ServerInstance); - - listenports.clear(); - clientactive = 0; sslports.clear(); - for(int index = 0; index < Conf->Enumerate("bind"); index++) + for (size_t i = 0; i < ServerInstance->ports.size(); i++) { - // For each tag - std::string x = Conf->ReadValue("bind", "type", index); - if(((x.empty()) || (x == "clients")) && (Conf->ReadValue("bind", "ssl", index) == "gnutls")) - { - // Get the port we're meant to be listening on with SSL - std::string port = Conf->ReadValue("bind", "port", index); - std::string addr = Conf->ReadValue("bind", "address", index); + ListenSocket* port = ServerInstance->ports[i]; + if (port->bind_tag->getString("ssl") != "gnutls") + continue; - irc::portparser portrange(port, false); - long portno = -1; - while ((portno = portrange.GetToken())) - { - clientactive++; - try - { - listenports.push_back(addr + ":" + ConvToStr(portno)); - - for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++) - if ((ServerInstance->Config->ports[i]->GetPort() == portno) && (ServerInstance->Config->ports[i]->GetIP() == addr)) - ServerInstance->Config->ports[i]->SetDescription("ssl"); - ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %ld", portno); - - sslports.append((addr.empty() ? "*" : addr)).append(":").append(ConvToStr(portno)).append(";"); - } - catch (ModuleException &e) - { - ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %ld: %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()); - } - } - } + 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") - { - delete Conf; return; - } - std::string confdir(ServerInstance->ConfigFileName); - // +1 so we the path ends with a / - confdir = confdir.substr(0, confdir.find_last_of('/') + 1); + OnRehash(user); + + ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls"); - cafile = Conf->ReadValue("gnutls", "cafile", 0); - crlfile = Conf->ReadValue("gnutls", "crlfile", 0); - certfile = Conf->ReadValue("gnutls", "certfile", 0); - keyfile = Conf->ReadValue("gnutls", "keyfile", 0); - dh_bits = Conf->ReadInteger("gnutls", "dhbits", 0, false); + cafile = Conf->getString("cafile"); + crlfile = Conf->getString("crlfile"); + certfile = Conf->getString("certfile"); + keyfile = Conf->getString("keyfile"); + dh_bits = Conf->getInt("dhbits"); // Set all the default values needed. if (cafile.empty()) - cafile = "ca.pem"; + cafile = "conf/ca.pem"; if (crlfile.empty()) - crlfile = "crl.pem"; + crlfile = "conf/crl.pem"; if (certfile.empty()) - certfile = "cert.pem"; + certfile = "conf/cert.pem"; if (keyfile.empty()) - keyfile = "key.pem"; + keyfile = "conf/key.pem"; if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096)) dh_bits = 1024; - // Prepend relative paths with the path to the config directory. - if ((cafile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(cafile))) - cafile = confdir + cafile; - - if ((crlfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(crlfile))) - crlfile = confdir + crlfile; - - if ((certfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(certfile))) - certfile = confdir + certfile; - - if ((keyfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(keyfile))) - keyfile = confdir + keyfile; - int ret; - + if (cred_alloc) { // Deallocate the old credentials @@ -246,29 +228,43 @@ class ModuleSSLGnuTLS : public Module } else cred_alloc = true; - + if((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0) - ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret)); - - 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)); - + 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",DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret)); + 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",DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret)); + 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)); - if((ret = gnutls_certificate_set_x509_key_file (x509_cred, certfile.c_str(), keyfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0) - { - // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException - throw ModuleException("Unable to load GnuTLS server certificate (" + std::string(certfile) + ", key: " + keyfile + "): " + std::string(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 + if((ret = gnutls_x509_crt_import(x509_cert, &cert_datum, GNUTLS_X509_FMT_PEM)) < 0) + throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + std::string(gnutls_strerror(ret))); + + 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_cert, 1, 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(); - - delete Conf; } void GenerateDHParams() @@ -284,319 +280,188 @@ class ModuleSSLGnuTLS : public Module ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret)); } - virtual ~ModuleSSLGnuTLS() + ~ModuleSSLGnuTLS() { - gnutls_dh_params_deinit(dh_params); - gnutls_certificate_free_credentials(x509_cred); + gnutls_x509_crt_deinit(x509_cert); + gnutls_x509_privkey_deinit(x509_key); + if (cred_alloc) + { + gnutls_dh_params_deinit(dh_params); + gnutls_certificate_free_credentials(x509_cred); + } gnutls_global_deinit(); - ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this); delete[] sessions; } - virtual void OnCleanup(int target_type, void* item) + void OnCleanup(int target_type, void* item) { if(target_type == TYPE_USER) { - User* user = (User*)item; + LocalUser* user = IS_LOCAL(static_cast(item)); - if (user->GetIOHook() == this) + 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"); - user->DelIOHook(); - } - if (user->GetExt("ssl_cert", dummy)) - { - ssl_cert* tofree; - user->GetExt("ssl_cert", tofree); - delete tofree; - user->Shrink("ssl_cert"); } } } - virtual void OnUnloadModule(Module* mod, const std::string &name) + Version GetVersion() { - if(mod == this) - { - for(unsigned int i = 0; i < listenports.size(); i++) - { - for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++) - if (listenports[i] == (ServerInstance->Config->ports[j]->GetIP()+":"+ConvToStr(ServerInstance->Config->ports[j]->GetPort()))) - ServerInstance->Config->ports[j]->SetDescription("plaintext"); - } - } + return Version("Provides SSL support for clients", VF_VENDOR); } - virtual Version GetVersion() - { - return Version("$Id$", VF_VENDOR, API_VERSION); - } - - virtual void On005Numeric(std::string &output) + void On005Numeric(std::string &output) { - output.append(" SSL=" + sslports); + if (!sslports.empty()) + output.append(" SSL=" + sslports); + output.append(" STARTTLS"); } - virtual void OnHookUserIO(User* user, const std::string &targetip) + void OnHookIO(StreamSocket* user, ListenSocket* lsb) { - if (!user->GetIOHook() && isin(targetip,user->GetPort(),listenports)) + if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls") { /* Hook the user with our module */ user->AddIOHook(this); } } - virtual const char* OnRequest(Request* request) + void OnRequest(Request& request) { - ISHRequest* ISR = (ISHRequest*)request; - if (strcmp("IS_NAME", request->GetId()) == 0) - { - return "gnutls"; - } - else if (strcmp("IS_HOOK", request->GetId()) == 0) - { - const char* ret = "OK"; - try - { - ret = ISR->Sock->AddIOHook((Module*)this) ? "OK" : NULL; - } - catch (ModuleException &e) - { - return NULL; - } - return ret; - } - else if (strcmp("IS_UNHOOK", request->GetId()) == 0) - { - return ISR->Sock->DelIOHook() ? "OK" : NULL; - } - else if (strcmp("IS_HSDONE", request->GetId()) == 0) + if (strcmp("GET_SSL_CERT", request.id) == 0) { - if (ISR->Sock->GetFd() < 0) - return "OK"; + SocketCertificateRequest& req = static_cast(request); + int fd = req.sock->GetFd(); + issl_session* session = &sessions[fd]; - issl_session* session = &sessions[ISR->Sock->GetFd()]; - return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : "OK"; - } - else if (strcmp("IS_ATTACH", request->GetId()) == 0) - { - if (ISR->Sock->GetFd() > -1) - { - issl_session* session = &sessions[ISR->Sock->GetFd()]; - if (session->sess) - { - if ((Extensible*)ServerInstance->FindDescriptor(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock)) - { - VerifyCertificate(session, (BufferedSocket*)ISR->Sock); - return "OK"; - } - } - } + req.cert = session->cert; } - return NULL; } - - virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport) + void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) { - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1)) - return; - + 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; - session->fd = fd; - session->inbuf = new char[inbufsize]; - session->inbufoffset = 0; - 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); - /* This is an experimental change to avoid a warning on 64bit systems about casting between integer and pointer of different sizes - * This needs testing, but it's easy enough to rollback if need be - * Old: gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket. - * New: gnutls_transport_set_ptr(session->sess, &fd); // Give gnutls the fd for the socket. - * - * With testing this seems to...not work :/ - */ - - gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket. + gnutls_transport_set_ptr(session->sess, reinterpret_cast(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); + Handshake(session, user); } - virtual void OnRawSocketConnect(int fd) + void OnStreamSocketConnect(StreamSocket* user) { - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1)) - return; - - issl_session* session = &sessions[fd]; - - session->fd = fd; - session->inbuf = new char[inbufsize]; - session->inbufoffset = 0; + 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, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket. + gnutls_transport_set_ptr(session->sess, reinterpret_cast(user)); + gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper); + gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper); - Handshake(session); + Handshake(session, user); } - virtual void OnRawSocketClose(int fd) + void OnStreamSocketClose(StreamSocket* user) { - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds())) - return; - - CloseSession(&sessions[fd]); - - EventHandler* user = ServerInstance->SE->GetRef(fd); - - if ((user) && (user->GetExt("ssl_cert", dummy))) - { - ssl_cert* tofree; - user->GetExt("ssl_cert", tofree); - delete tofree; - user->Shrink("ssl_cert"); - } + CloseSession(&sessions[user->GetFd()]); } - virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult) + int OnStreamSocketRead(StreamSocket* user, std::string& recvq) { - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1)) - return 0; - - issl_session* session = &sessions[fd]; + issl_session* session = &sessions[user->GetFd()]; if (!session->sess) { - readresult = 0; CloseSession(session); - return 1; + user->SetError("No SSL session"); + return -1; } - if (session->status == ISSL_HANDSHAKING_READ) + if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) { // The handshake isn't finished, try to finish it. - if(!Handshake(session)) + if(!Handshake(session, user)) { - // Couldn't resume handshake. + if (session->status != ISSL_CLOSING) + return 0; return -1; } } - else if (session->status == ISSL_HANDSHAKING_WRITE) - { - errno = EAGAIN; - MakePollWrite(session); - return -1; - } // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN. if (session->status == ISSL_HANDSHAKEN) { - // Is this right? Not sure if the unencrypted data is garaunteed to be the same length. - // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet. - int ret = gnutls_record_recv(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset); - - if (ret == 0) + char* buffer = ServerInstance->GetReadBuffer(); + size_t bufsiz = ServerInstance->Config->NetBufferSize; + int ret = gnutls_record_recv(session->sess, buffer, bufsiz); + if (ret > 0) { - // Client closed connection. - readresult = 0; - CloseSession(session); + recvq.append(buffer, ret); return 1; } - else if (ret < 0) + else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED) { - if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED) - { - errno = EAGAIN; - return -1; - } - else - { - readresult = 0; - CloseSession(session); - } + return 0; + } + else if (ret == 0) + { + user->SetError("SSL Connection closed"); + CloseSession(session); + return -1; } else { - // Read successfully 'ret' bytes into inbuf + inbufoffset - // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf' - // 'buffer' is 'count' long - - unsigned int length = ret + session->inbufoffset; - - if(count <= length) - { - memcpy(buffer, session->inbuf, count); - // Move the stuff left in inbuf to the beginning of it - memmove(session->inbuf, session->inbuf + count, (length - count)); - // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp. - session->inbufoffset = length - count; - // Insp uses readresult as the count of how much data there is in buffer, so: - readresult = count; - } - else - { - // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing. - memcpy(buffer, session->inbuf, length); - // Zero the offset, as there's nothing there.. - session->inbufoffset = 0; - // As above - readresult = length; - } + user->SetError(gnutls_strerror(ret)); + CloseSession(session); + return -1; } } - else if(session->status == ISSL_CLOSING) - readresult = 0; + else if (session->status == ISSL_CLOSING) + return -1; - return 1; + return 0; } - virtual int OnRawSocketWrite(int fd, const char* buffer, int count) + int OnStreamSocketWrite(StreamSocket* user, std::string& sendq) { - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1)) - return 0; - - issl_session* session = &sessions[fd]; - const char* sendbuffer = buffer; + issl_session* session = &sessions[user->GetFd()]; if (!session->sess) { CloseSession(session); - return 1; + user->SetError("No SSL session"); + return -1; } - session->outbuf.append(sendbuffer, count); - sendbuffer = session->outbuf.c_str(); - count = session->outbuf.size(); - - if (session->status == ISSL_HANDSHAKING_WRITE) + if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ) { // The handshake isn't finished, try to finish it. - Handshake(session); - errno = EAGAIN; + Handshake(session, user); + if (session->status != ISSL_CLOSING) + return 0; return -1; } @@ -604,80 +469,42 @@ class ModuleSSLGnuTLS : public Module if (session->status == ISSL_HANDSHAKEN) { - ret = gnutls_record_send(session->sess, sendbuffer, count); + ret = gnutls_record_send(session->sess, sendq.data(), sendq.length()); - if (ret == 0) + if (ret == (int)sendq.length()) { - CloseSession(session); + ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE); + return 1; } - else if (ret < 0) + else if (ret > 0) { - if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED) - { - CloseSession(session); - } - else - { - errno = EAGAIN; - } + sendq = sendq.substr(ret); + ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE); + return 0; } - else + else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED) { - session->outbuf = session->outbuf.substr(ret); + ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE); + return 0; } - } - - MakePollWrite(session); - - /* Who's smart idea was it to return 1 when we havent written anything? - * This fucks the buffer up in BufferedSocket :p - */ - return ret < 1 ? 0 : ret; - } - - // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection - virtual void OnWhois(User* source, User* dest) - { - if (!clientactive) - return; - - // Bugfix, only send this numeric for *our* SSL users - if (dest->GetExt("ssl", dummy) || ((IS_LOCAL(dest) && (dest->GetIOHook() == this)))) - { - ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str()); - } - } - - virtual void OnSyncUserMetaData(User* user, Module* proto, void* opaque, const std::string &extname, bool displayable) - { - // check if the linking module wants to know about OUR metadata - if(extname == "ssl") - { - // check if this user has an swhois field to send - if(user->GetExt(extname, dummy)) + else if (ret == 0) { - // call this function in the linking module, let it format the data how it - // sees fit, and send it on its way. We dont need or want to know how. - proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON"); + CloseSession(session); + user->SetError("SSL Connection closed"); + return -1; } - } - } - - virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata) - { - // check if its our metadata key, and its associated with a user - if ((target_type == TYPE_USER) && (extname == "ssl")) - { - User* dest = (User*)target; - // if they dont already have an ssl flag, accept the remote server's - if (!dest->GetExt(extname, dummy)) + else // (ret < 0) { - dest->Extend(extname, "ON"); + user->SetError(gnutls_strerror(ret)); + CloseSession(session); + return -1; } } + + return 0; } - bool Handshake(issl_session* session) + bool Handshake(issl_session* session, StreamSocket* user) { int ret = gnutls_handshake(session->sess); @@ -691,17 +518,18 @@ class ModuleSSLGnuTLS : public Module { // 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; - MakePollWrite(session); + ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE); } } else { - // Handshake failed. + user->SetError(std::string("Handshake Failed - ") + gnutls_strerror(ret)); CloseSession(session); session->status = ISSL_CLOSING; } @@ -710,37 +538,25 @@ class ModuleSSLGnuTLS : public Module } else { - // Handshake complete. - // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater. - User* extendme = ServerInstance->FindDescriptor(session->fd); - if (extendme) - { - if (!extendme->GetExt("ssl", dummy)) - extendme->Extend("ssl", "ON"); - } - // Change the seesion state session->status = ISSL_HANDSHAKEN; + VerifyCertificate(session,user); + // Finish writing, if any left - MakePollWrite(session); + ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE); return true; } } - virtual void OnPostConnect(User* user) + void OnUserConnect(LocalUser* user) { - // This occurs AFTER OnUserConnect so we can be sure the - // protocol module has propagated the NICK message. - if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user))) + if (user->eh.GetIOHook() == this) { - // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW. - ServerInstance->PI->SendMetaData(user, TYPE_USER, "SSL", "on"); - - VerifyCertificate(&sessions[user->GetFd()],user); if (sessions[user->GetFd()].sess) { + SSLCertSubmission(user, this, ServerInstance->Modules->Find("m_sslinfo.so"), sessions[user->GetFd()].cert); std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->GetFd()].sess)); cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->GetFd()].sess))).append("-"); cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->GetFd()].sess))); @@ -749,46 +565,21 @@ class ModuleSSLGnuTLS : public Module } } - void MakePollWrite(issl_session* session) - { - //OnRawSocketWrite(session->fd, NULL, 0); - EventHandler* eh = ServerInstance->FindDescriptor(session->fd); - if (eh) - ServerInstance->SE->WantWrite(eh); - } - - virtual void OnBufferFlushed(User* user) - { - if (user->GetExt("ssl")) - { - issl_session* session = &sessions[user->GetFd()]; - if (session && session->outbuf.size()) - OnRawSocketWrite(user->GetFd(), NULL, 0); - } - } - void CloseSession(issl_session* session) { - if(session->sess) + if (session->sess) { gnutls_bye(session->sess, GNUTLS_SHUT_WR); gnutls_deinit(session->sess); } - - if(session->inbuf) - { - delete[] session->inbuf; - } - - session->outbuf.clear(); - session->inbuf = NULL; session->sess = NULL; + session->cert = NULL; session->status = ISSL_NONE; } - void VerifyCertificate(issl_session* session, Extensible* user) + void VerifyCertificate(issl_session* session, StreamSocket* user) { - if (!session->sess || !user) + if (!session->sess || !user || session->cert) return; unsigned int status; @@ -801,8 +592,7 @@ class ModuleSSLGnuTLS : public Module size_t digest_size = sizeof(digest); size_t name_size = sizeof(name); ssl_cert* certinfo = new ssl_cert; - - user->Extend("ssl_cert",certinfo); + session->cert = certinfo; /* This verification function uses the trusted CAs in the credentials * structure. So you must have installed one or more CA certificates. @@ -811,42 +601,14 @@ class ModuleSSLGnuTLS : public Module if (ret < 0) { - certinfo->data.insert(std::make_pair("error",std::string(gnutls_strerror(ret)))); + certinfo->error = std::string(gnutls_strerror(ret)); return; } - if (status & GNUTLS_CERT_INVALID) - { - certinfo->data.insert(std::make_pair("invalid",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("invalid",ConvToStr(0))); - } - if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0))); - } - if (status & GNUTLS_CERT_REVOKED) - { - certinfo->data.insert(std::make_pair("revoked",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("revoked",ConvToStr(0))); - } - if (status & GNUTLS_CERT_SIGNER_NOT_CA) - { - certinfo->data.insert(std::make_pair("trusted",ConvToStr(0))); - } - else - { - certinfo->data.insert(std::make_pair("trusted",ConvToStr(1))); - } + 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 @@ -854,14 +616,14 @@ class ModuleSSLGnuTLS : public Module */ if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509) { - certinfo->data.insert(std::make_pair("error","No X509 keys sent")); + certinfo->error = "No X509 keys sent"; return; } ret = gnutls_x509_crt_init(&cert); if (ret < 0) { - certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret))); + certinfo->error = gnutls_strerror(ret); return; } @@ -869,8 +631,8 @@ class ModuleSSLGnuTLS : public Module cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size); if (cert_list == NULL) { - certinfo->data.insert(std::make_pair("error","No certificate was found")); - return; + certinfo->error = "No certificate was found"; + goto info_done_dealloc; } /* This is not a real world example, since we only check the first @@ -880,48 +642,39 @@ class ModuleSSLGnuTLS : public Module ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER); if (ret < 0) { - certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret))); - return; + certinfo->error = gnutls_strerror(ret); + goto info_done_dealloc; } gnutls_x509_crt_get_dn(cert, name, &name_size); - - certinfo->data.insert(std::make_pair("dn",name)); + certinfo->dn = name; gnutls_x509_crt_get_issuer_dn(cert, name, &name_size); - - certinfo->data.insert(std::make_pair("issuer",name)); + certinfo->issuer = name; if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0) { - certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret))); + certinfo->error = gnutls_strerror(ret); } else { - certinfo->data.insert(std::make_pair("fingerprint",irc::hex(digest, digest_size))); + certinfo->fingerprint = irc::hex(digest, digest_size); } /* Beware here we do not check for errors. */ - if ((gnutls_x509_crt_get_expiration_time(cert) < time(0)) || (gnutls_x509_crt_get_activation_time(cert) > time(0))) + if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time())) { - certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate")); + certinfo->error = "Not activated, or expired certificate"; } +info_done_dealloc: gnutls_x509_crt_deinit(cert); - - return; - } - - void OnEvent(Event* ev) - { - GenericCapHandler(ev, "tls", "tls"); } - void Prioritize() + void OnEvent(Event& ev) { - Module* server = ServerInstance->Modules->Find("m_spanningtree.so"); - ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIO_AFTER, &server); + capHandler.HandleEvent(ev); } };