-/* +------------------------------------+\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 <openssl/ssl.h>\r#include <openssl/err.h>\r\r#ifdef WINDOWS\r#include <openssl/applink.c>\r#endif\r\r#include "configreader.h"\r#include "users.h"\r#include "channels.h"\r#include "modules.h"\r\r#include "socket.h"\r#include "hashcomp.h"\r\r#include "transport.h"\r\r#ifdef WINDOWS\r#pragma comment(lib, "libeay32MTd")\r#pragma comment(lib, "ssleay32MTd")\r#undef MAX_DESCRIPTORS\r#define MAX_DESCRIPTORS 10000\r#endif\r\r/* $ModDesc: Provides SSL support for clients */\r/* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */\r/* $LinkerFlags: rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */\r/* $ModDep: transport.h */\r\renum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };\renum issl_io_status { ISSL_WRITE, ISSL_READ };\r\rstatic bool SelfSigned = false;\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\rchar* get_error()\r{\r return ERR_error_string(ERR_get_error(), NULL);\r}\r\rstatic int error_callback(const char *str, size_t len, void *u);\r\r/** Represents an SSL user's extra data\r */\rclass issl_session : public classbase\r{\rpublic:\r SSL* sess;\r issl_status status;\r issl_io_status rstat;\r issl_io_status wstat;\r\r unsigned int inbufoffset;\r char* inbuf; // Buffer OpenSSL reads into.\r std::string outbuf; // Buffer for outgoing data that OpenSSL will not take.\r int fd;\r bool outbound;\r\r issl_session()\r {\r outbound = false;\r rstat = ISSL_READ;\r wstat = ISSL_WRITE;\r }\r};\r\rstatic int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)\r{\r /* XXX: This will allow self signed certificates.\r * In the future if we want an option to not allow this,\r * we can just return preverify_ok here, and openssl\r * will boot off self-signed and invalid peer certs.\r */\r int ve = X509_STORE_CTX_get_error(ctx);\r\r SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);\r\r return 1;\r}\r\rclass ModuleSSLOpenSSL : public Module\r{\r\r ConfigReader* Conf;\r\r std::vector<int> listenports;\r\r int inbufsize;\r issl_session sessions[MAX_DESCRIPTORS];\r\r SSL_CTX* ctx;\r SSL_CTX* clictx;\r\r char* dummy;\r char cipher[MAXBUF];\r\r std::string keyfile;\r std::string certfile;\r std::string cafile;\r // std::string crlfile;\r std::string dhfile;\r std::string sslports;\r\r int clientactive;\r\r public:\r\r InspIRCd* PublicInstance;\r\r ModuleSSLOpenSSL(InspIRCd* Me)\r : Module(Me), PublicInstance(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 /* Global SSL library initialization*/\r SSL_library_init();\r SSL_load_error_strings();\r\r /* Build our SSL contexts:\r * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.\r */\r ctx = SSL_CTX_new( SSLv23_server_method() );\r clictx = SSL_CTX_new( SSLv23_client_method() );\r\r SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);\r SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);\r\r // Needs the flag as it ignores a plain /rehash\r OnRehash(NULL,"ssl");\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) == "openssl"))\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_openssl.so: Enabling SSL for port %d", portno);\r sslports.append("*:").append(ConvToStr(portno)).append(";");\r }\r else\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.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_openssl.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 another SSL or similar module loaded?", portno, e.GetReason());\r }\r }\r }\r }\r\r if (!sslports.empty())\r sslports.erase(sslports.end() - 1);\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("openssl", "cafile", 0);\r certfile = Conf->ReadValue("openssl", "certfile", 0);\r keyfile = Conf->ReadValue("openssl", "keyfile", 0);\r dhfile = Conf->ReadValue("openssl", "dhfile", 0);\r\r // Set all the default values needed.\r if (cafile.empty())\r cafile = "ca.pem";\r\r if (certfile.empty())\r certfile = "cert.pem";\r\r if (keyfile.empty())\r keyfile = "key.pem";\r\r if (dhfile.empty())\r dhfile = "dhparams.pem";\r\r // Prepend relative paths with the path to the config directory.\r if (cafile[0] != '/')\r cafile = confdir + cafile;\r\r if (certfile[0] != '/')\r certfile = confdir + certfile;\r\r if (keyfile[0] != '/')\r keyfile = confdir + keyfile;\r\r if (dhfile[0] != '/')\r dhfile = confdir + dhfile;\r\r /* Load our keys and certificates\r * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.\r */\r if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));\r ERR_print_errors_cb(error_callback, this);\r }\r\r if (((!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))) || (!SSL_CTX_use_PrivateKey_file(clictx, keyfile.c_str(), SSL_FILETYPE_PEM)))\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));\r ERR_print_errors_cb(error_callback, this);\r }\r\r /* Load the CAs we trust*/\r if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));\r ERR_print_errors_cb(error_callback, this);\r }\r\r FILE* dhpfile = fopen(dhfile.c_str(), "r");\r DH* ret;\r\r if (dhpfile == NULL)\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));\r throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));\r }\r else\r {\r ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);\r if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))\r {\r ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());\r ERR_print_errors_cb(error_callback, this);\r }\r }\r\r fclose(dhpfile);\r\r DELETE(Conf);\r }\r\r virtual void On005Numeric(std::string &output)\r {\r output.append(" SSL=" + sslports);\r }\r\r virtual ~ModuleSSLOpenSSL()\r {\r SSL_CTX_free(ctx);\r SSL_CTX_free(clictx);\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) && IS_LOCAL(user) && 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_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = List[I_On005Numeric] = 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 char* OnRequest(Request* request)\r {\r ISHRequest* ISR = (ISHRequest*)request;\r if (strcmp("IS_NAME", request->GetId()) == 0)\r {\r return "openssl";\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\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 ServerInstance->Log(DEBUG,"Module checking if handshake is done");\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) ? NULL : (char*)"OK";\r }\r else if (strcmp("IS_ATTACH", request->GetId()) == 0)\r {\r issl_session* session = &sessions[ISR->Sock->GetFd()];\r if (session->sess)\r {\r VerifyCertificate(session, (InspSocket*)ISR->Sock);\r return "OK";\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 session->sess = SSL_new(ctx);\r session->status = ISSL_NONE;\r session->outbound = false;\r\r if (session->sess == NULL)\r return;\r\r if (SSL_set_fd(session->sess, fd) == 0)\r {\r ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);\r return;\r }\r\r Handshake(session);\r }\r\r virtual void OnRawSocketConnect(int fd)\r {\r ServerInstance->Log(DEBUG,"OnRawSocketConnect connecting");\r issl_session* session = &sessions[fd];\r\r session->fd = fd;\r session->inbuf = new char[inbufsize];\r session->inbufoffset = 0;\r session->sess = SSL_new(clictx);\r session->status = ISSL_NONE;\r session->outbound = true;\r\r if (session->sess == NULL)\r return;\r\r if (SSL_set_fd(session->sess, fd) == 0)\r {\r ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);\r return;\r }\r\r Handshake(session);\r ServerInstance->Log(DEBUG,"Exiting OnRawSocketConnect");\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 ServerInstance->Log(DEBUG,"OnRawSocketRead");\r\r if (!session->sess)\r {\r ServerInstance->Log(DEBUG,"OnRawSocketRead has no session");\r readresult = 0;\r CloseSession(session);\r return 1;\r }\r\r if (session->status == ISSL_HANDSHAKING)\r {\r if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)\r {\r ServerInstance->Log(DEBUG,"Resume handshake in read");\r // The handshake isn't finished and it wants to read, try to finish it.\r if (!Handshake(session))\r {\r ServerInstance->Log(DEBUG,"Cant resume handshake in read");\r // Couldn't resume handshake.\r return -1;\r }\r }\r else\r {\r errno = EAGAIN;\r return -1;\r }\r }\r\r // If we resumed the handshake then session->status will be ISSL_OPEN\r\r if (session->status == ISSL_OPEN)\r {\r if (session->wstat == ISSL_READ)\r {\r if(DoWrite(session) == 0)\r return 0;\r }\r\r if (session->rstat == ISSL_READ)\r {\r int ret = DoRead(session);\r\r if (ret > 0)\r {\r if (count <= session->inbufoffset)\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, (session->inbufoffset - count));\r // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.\r session->inbufoffset -= 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, session->inbufoffset);\r\r readresult = session->inbufoffset;\r // Zero the offset, as there's nothing there..\r session->inbufoffset = 0;\r }\r\r return 1;\r }\r else\r {\r return ret;\r }\r }\r }\r\r return -1;\r }\r\r virtual int OnRawSocketWrite(int fd, const char* buffer, int count)\r {\r issl_session* session = &sessions[fd];\r\r if (!session->sess)\r {\r ServerInstance->Log(DEBUG,"Close session missing sess");\r CloseSession(session);\r return -1;\r }\r\r session->outbuf.append(buffer, count);\r\r if (session->status == ISSL_HANDSHAKING)\r {\r // The handshake isn't finished, try to finish it.\r if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)\r {\r ServerInstance->Log(DEBUG,"Handshake resume");\r Handshake(session);\r }\r }\r\r if (session->status == ISSL_OPEN)\r {\r if (session->rstat == ISSL_WRITE)\r {\r ServerInstance->Log(DEBUG,"DoRead");\r DoRead(session);\r }\r\r if (session->wstat == ISSL_WRITE)\r {\r ServerInstance->Log(DEBUG,"DoWrite");\r return DoWrite(session);\r }\r }\r\r return 1;\r }\r\r int DoWrite(issl_session* session)\r {\r if (!session->outbuf.size())\r return -1;\r\r int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());\r\r if (ret == 0)\r {\r ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_write");\r CloseSession(session);\r return 0;\r }\r else if (ret < 0)\r {\r int err = SSL_get_error(session->sess, ret);\r\r if (err == SSL_ERROR_WANT_WRITE)\r {\r session->wstat = ISSL_WRITE;\r return -1;\r }\r else if (err == SSL_ERROR_WANT_READ)\r {\r session->wstat = ISSL_READ;\r return -1;\r }\r else\r {\r ServerInstance->Log(DEBUG,"Close due to returned -1 in SSL_Write");\r CloseSession(session);\r return 0;\r }\r }\r else\r {\r session->outbuf = session->outbuf.substr(ret);\r return ret;\r }\r }\r\r int DoRead(issl_session* session)\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 \r ServerInstance->Log(DEBUG,"DoRead");\r\r int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);\r\r if (ret == 0)\r {\r // Client closed connection.\r ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_read");\r CloseSession(session);\r return 0;\r }\r else if (ret < 0)\r {\r int err = SSL_get_error(session->sess, ret);\r\r if (err == SSL_ERROR_WANT_READ)\r {\r session->rstat = ISSL_READ;\r ServerInstance->Log(DEBUG,"Setting want_read");\r return -1;\r }\r else if (err == SSL_ERROR_WANT_WRITE)\r {\r session->rstat = ISSL_WRITE;\r ServerInstance->Log(DEBUG,"Setting want_write");\r return -1;\r }\r else\r {\r ServerInstance->Log(DEBUG,"Closed due to returned -1 in SSL_Read");\r CloseSession(session);\r return 0;\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 session->inbufoffset += ret;\r\r return ret;\r }\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 ServerInstance->Log(DEBUG,"Handshake");\r int ret;\r\r if (session->outbound)\r {\r ServerInstance->Log(DEBUG,"SSL_connect");\r ret = SSL_connect(session->sess);\r }\r else\r ret = SSL_accept(session->sess);\r\r if (ret < 0)\r {\r int err = SSL_get_error(session->sess, ret);\r\r if (err == SSL_ERROR_WANT_READ)\r {\r ServerInstance->Log(DEBUG,"Want read, handshaking");\r session->rstat = ISSL_READ;\r session->status = ISSL_HANDSHAKING;\r return true;\r }\r else if (err == SSL_ERROR_WANT_WRITE)\r {\r ServerInstance->Log(DEBUG,"Want write, handshaking");\r session->wstat = ISSL_WRITE;\r session->status = ISSL_HANDSHAKING;\r MakePollWrite(session);\r return true;\r }\r else\r {\r ServerInstance->Log(DEBUG,"Handshake failed");\r CloseSession(session);\r }\r\r return false;\r }\r else if (ret > 0)\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* u = ServerInstance->FindDescriptor(session->fd);\r if (u)\r {\r if (!u->GetExt("ssl", dummy))\r u->Extend("ssl", "ON");\r }\r\r session->status = ISSL_OPEN;\r\r MakePollWrite(session);\r\r return true;\r }\r else if (ret == 0)\r {\r int ssl_err = SSL_get_error(session->sess, ret);\r char buf[1024];\r ERR_print_errors_fp(stderr);\r ServerInstance->Log(DEBUG,"Handshake fail 2: %d: %s", ssl_err, ERR_error_string(ssl_err,buf));\r CloseSession(session);\r return true;\r }\r\r return true;\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 user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick, SSL_get_cipher(sessions[user->GetFd()].sess));\r }\r }\r\r void MakePollWrite(issl_session* session)\r {\r OnRawSocketWrite(session->fd, NULL, 0);\r //EventHandler* eh = ServerInstance->FindDescriptor(session->fd);\r //if (eh)\r // ServerInstance->SE->WantWrite(eh);\r }\r\r void CloseSession(issl_session* session)\r {\r if (session->sess)\r {\r SSL_shutdown(session->sess);\r SSL_free(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 X509* cert;\r ssl_cert* certinfo = new ssl_cert;\r unsigned int n;\r unsigned char md[EVP_MAX_MD_SIZE];\r const EVP_MD *digest = EVP_md5();\r\r user->Extend("ssl_cert",certinfo);\r\r cert = SSL_get_peer_certificate((SSL*)session->sess);\r\r if (!cert)\r {\r certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));\r return;\r }\r\r certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));\r\r if (SelfSigned)\r {\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));\r }\r else\r {\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));\r }\r\r certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));\r certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));\r\r if (!X509_digest(cert, digest, md, &n))\r {\r certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));\r }\r else\r {\r certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));\r }\r\r if ((ASN1_UTCTIME_cmp_time_t(X509_get_notAfter(cert), time(NULL)) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_get_notBefore(cert), time(NULL)) == 0))\r {\r certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));\r }\r\r X509_free(cert);\r }\r};\r\rstatic int error_callback(const char *str, size_t len, void *u)\r{\r ModuleSSLOpenSSL* mssl = (ModuleSSLOpenSSL*)u;\r mssl->PublicInstance->Log(DEFAULT, "SSL error: " + std::string(str, len - 1));\r return 0;\r}\r\rMODULE_INIT(ModuleSSLOpenSSL);\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 Pippijn van Steenhoven <pip88nl@gmail.com>
+ * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ * 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 "iohook.h"
+#include "modules/ssl.h"
+
+// Ignore OpenSSL deprecation warnings on OS X Lion and newer.
+#if defined __APPLE__
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
+// Fix warnings about the use of `long long` on C++03.
+#if defined __clang__
+# pragma clang diagnostic ignored "-Wc++11-long-long"
+#elif defined __GNUC__
+# pragma GCC diagnostic ignored "-Wlong-long"
+#endif
+
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+
+#ifdef _WIN32
+# pragma comment(lib, "ssleay32.lib")
+# pragma comment(lib, "libeay32.lib")
+#endif
+
+/* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
+/* $LinkerFlags: rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto") */
+
+#if ((OPENSSL_VERSION_NUMBER >= 0x10000000L) && (!(defined(OPENSSL_NO_ECDH))))
+// OpenSSL 0.9.8 includes some ECC support, but it's unfinished. Enable only for 1.0.0 and later.
+#define INSPIRCD_OPENSSL_ENABLE_ECDH
+#endif
+
+enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
+
+static bool SelfSigned = false;
+static int exdataindex;
+
+char* get_error()
+{
+ return ERR_error_string(ERR_get_error(), NULL);
+}
+
+static int OnVerify(int preverify_ok, X509_STORE_CTX* ctx);
+static void StaticSSLInfoCallback(const SSL* ssl, int where, int rc);
+
+namespace OpenSSL
+{
+ class Exception : public ModuleException
+ {
+ public:
+ Exception(const std::string& reason)
+ : ModuleException(reason) { }
+ };
+
+ class DHParams
+ {
+ DH* dh;
+
+ public:
+ DHParams(const std::string& filename)
+ {
+ BIO* dhpfile = BIO_new_file(filename.c_str(), "r");
+ if (dhpfile == NULL)
+ throw Exception("Couldn't open DH file " + filename);
+
+ dh = PEM_read_bio_DHparams(dhpfile, NULL, NULL, NULL);
+ BIO_free(dhpfile);
+
+ if (!dh)
+ throw Exception("Couldn't read DH params from file " + filename);
+ }
+
+ ~DHParams()
+ {
+ DH_free(dh);
+ }
+
+ DH* get()
+ {
+ return dh;
+ }
+ };
+
+ class Context
+ {
+ SSL_CTX* const ctx;
+ long ctx_options;
+
+ public:
+ Context(SSL_CTX* context)
+ : ctx(context)
+ {
+ // Sane default options for OpenSSL see https://www.openssl.org/docs/ssl/SSL_CTX_set_options.html
+ // and when choosing a cipher, use the server's preferences instead of the client preferences.
+ long opts = SSL_OP_NO_SSLv2 | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_CIPHER_SERVER_PREFERENCE | SSL_OP_SINGLE_DH_USE;
+ // Only turn options on if they exist
+#ifdef SSL_OP_SINGLE_ECDH_USE
+ opts |= SSL_OP_SINGLE_ECDH_USE;
+#endif
+#ifdef SSL_OP_NO_TICKET
+ opts |= SSL_OP_NO_TICKET;
+#endif
+
+ ctx_options = SSL_CTX_set_options(ctx, opts);
+
+ long mode = SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER;
+#ifdef SSL_MODE_RELEASE_BUFFERS
+ mode |= SSL_MODE_RELEASE_BUFFERS;
+#endif
+ SSL_CTX_set_mode(ctx, mode);
+ SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
+ SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
+ SSL_CTX_set_info_callback(ctx, StaticSSLInfoCallback);
+ }
+
+ ~Context()
+ {
+ SSL_CTX_free(ctx);
+ }
+
+ bool SetDH(DHParams& dh)
+ {
+ ERR_clear_error();
+ return (SSL_CTX_set_tmp_dh(ctx, dh.get()) >= 0);
+ }
+
+#ifdef INSPIRCD_OPENSSL_ENABLE_ECDH
+ void SetECDH(const std::string& curvename)
+ {
+ int nid = OBJ_sn2nid(curvename.c_str());
+ if (nid == 0)
+ throw Exception("Unknown curve: " + curvename);
+
+ EC_KEY* eckey = EC_KEY_new_by_curve_name(nid);
+ if (!eckey)
+ throw Exception("Unable to create EC key object");
+
+ ERR_clear_error();
+ bool ret = (SSL_CTX_set_tmp_ecdh(ctx, eckey) >= 0);
+ EC_KEY_free(eckey);
+ if (!ret)
+ throw Exception("Couldn't set ECDH parameters");
+ }
+#endif
+
+ bool SetCiphers(const std::string& ciphers)
+ {
+ ERR_clear_error();
+ return SSL_CTX_set_cipher_list(ctx, ciphers.c_str());
+ }
+
+ bool SetCerts(const std::string& filename)
+ {
+ ERR_clear_error();
+ return SSL_CTX_use_certificate_chain_file(ctx, filename.c_str());
+ }
+
+ bool SetPrivateKey(const std::string& filename)
+ {
+ ERR_clear_error();
+ return SSL_CTX_use_PrivateKey_file(ctx, filename.c_str(), SSL_FILETYPE_PEM);
+ }
+
+ bool SetCA(const std::string& filename)
+ {
+ ERR_clear_error();
+ return SSL_CTX_load_verify_locations(ctx, filename.c_str(), 0);
+ }
+
+ long GetDefaultContextOptions() const
+ {
+ return ctx_options;
+ }
+
+ long SetRawContextOptions(long setoptions, long clearoptions)
+ {
+ // Clear everything
+ SSL_CTX_clear_options(ctx, SSL_CTX_get_options(ctx));
+
+ // Set the default options and what is in the conf
+ SSL_CTX_set_options(ctx, ctx_options | setoptions);
+ return SSL_CTX_clear_options(ctx, clearoptions);
+ }
+
+ SSL* CreateServerSession()
+ {
+ SSL* sess = SSL_new(ctx);
+ SSL_set_accept_state(sess); // Act as server
+ return sess;
+ }
+
+ SSL* CreateClientSession()
+ {
+ SSL* sess = SSL_new(ctx);
+ SSL_set_connect_state(sess); // Act as client
+ return sess;
+ }
+ };
+
+ class Profile : public refcountbase
+ {
+ /** Name of this profile
+ */
+ const std::string name;
+
+ /** DH parameters in use
+ */
+ DHParams dh;
+
+ /** OpenSSL makes us have two contexts, one for servers and one for clients
+ */
+ Context ctx;
+ Context clictx;
+
+ /** Digest to use when generating fingerprints
+ */
+ const EVP_MD* digest;
+
+ /** Last error, set by error_callback()
+ */
+ std::string lasterr;
+
+ /** True if renegotiations are allowed, false if not
+ */
+ const bool allowrenego;
+
+ /** Rough max size of records to send
+ */
+ const unsigned int outrecsize;
+
+ static int error_callback(const char* str, size_t len, void* u)
+ {
+ Profile* profile = reinterpret_cast<Profile*>(u);
+ profile->lasterr = std::string(str, len - 1);
+ return 0;
+ }
+
+ /** Set raw OpenSSL context (SSL_CTX) options from a config tag
+ * @param ctxname Name of the context, client or server
+ * @param tag Config tag defining this profile
+ * @param context Context object to manipulate
+ */
+ void SetContextOptions(const std::string& ctxname, ConfigTag* tag, Context& context)
+ {
+ long setoptions = tag->getInt(ctxname + "setoptions");
+ long clearoptions = tag->getInt(ctxname + "clearoptions");
+#ifdef SSL_OP_NO_COMPRESSION
+ if (!tag->getBool("compression", false)) // Disable compression by default
+ setoptions |= SSL_OP_NO_COMPRESSION;
+#endif
+ if (!tag->getBool("sslv3", false)) // Disable SSLv3 by default
+ setoptions |= SSL_OP_NO_SSLv3;
+ if (!tag->getBool("tlsv1", true))
+ setoptions |= SSL_OP_NO_TLSv1;
+
+ if (!setoptions && !clearoptions)
+ return; // Nothing to do
+
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Setting %s %s context options, default: %ld set: %ld clear: %ld", name.c_str(), ctxname.c_str(), ctx.GetDefaultContextOptions(), setoptions, clearoptions);
+ long final = context.SetRawContextOptions(setoptions, clearoptions);
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "%s %s context options: %ld", name.c_str(), ctxname.c_str(), final);
+ }
+
+ public:
+ Profile(const std::string& profilename, ConfigTag* tag)
+ : name(profilename)
+ , dh(ServerInstance->Config->Paths.PrependConfig(tag->getString("dhfile", "dh.pem")))
+ , ctx(SSL_CTX_new(SSLv23_server_method()))
+ , clictx(SSL_CTX_new(SSLv23_client_method()))
+ , allowrenego(tag->getBool("renegotiation")) // Disallow by default
+ , outrecsize(tag->getInt("outrecsize", 2048, 512, 16384))
+ {
+ if ((!ctx.SetDH(dh)) || (!clictx.SetDH(dh)))
+ throw Exception("Couldn't set DH parameters");
+
+ std::string hash = tag->getString("hash", "md5");
+ digest = EVP_get_digestbyname(hash.c_str());
+ if (digest == NULL)
+ throw Exception("Unknown hash type " + hash);
+
+ std::string ciphers = tag->getString("ciphers");
+ if (!ciphers.empty())
+ {
+ if ((!ctx.SetCiphers(ciphers)) || (!clictx.SetCiphers(ciphers)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't set cipher list to \"" + ciphers + "\" " + lasterr);
+ }
+ }
+
+#ifdef INSPIRCD_OPENSSL_ENABLE_ECDH
+ std::string curvename = tag->getString("ecdhcurve", "prime256v1");
+ if (!curvename.empty())
+ ctx.SetECDH(curvename);
+#endif
+
+ SetContextOptions("server", tag, ctx);
+ SetContextOptions("client", tag, clictx);
+
+ /* Load our keys and certificates
+ * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
+ */
+ std::string filename = ServerInstance->Config->Paths.PrependConfig(tag->getString("certfile", "cert.pem"));
+ if ((!ctx.SetCerts(filename)) || (!clictx.SetCerts(filename)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't read certificate file: " + lasterr);
+ }
+
+ filename = ServerInstance->Config->Paths.PrependConfig(tag->getString("keyfile", "key.pem"));
+ if ((!ctx.SetPrivateKey(filename)) || (!clictx.SetPrivateKey(filename)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't read key file: " + lasterr);
+ }
+
+ // Load the CAs we trust
+ filename = ServerInstance->Config->Paths.PrependConfig(tag->getString("cafile", "ca.pem"));
+ if ((!ctx.SetCA(filename)) || (!clictx.SetCA(filename)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Can't read CA list from %s. This is only a problem if you want to verify client certificates, otherwise it's safe to ignore this message. Error: %s", filename.c_str(), lasterr.c_str());
+ }
+ }
+
+ const std::string& GetName() const { return name; }
+ SSL* CreateServerSession() { return ctx.CreateServerSession(); }
+ SSL* CreateClientSession() { return clictx.CreateClientSession(); }
+ const EVP_MD* GetDigest() { return digest; }
+ bool AllowRenegotiation() const { return allowrenego; }
+ unsigned int GetOutgoingRecordSize() const { return outrecsize; }
+ };
+
+ namespace BIOMethod
+ {
+ static int create(BIO* bio)
+ {
+ bio->init = 1;
+ return 1;
+ }
+
+ static int destroy(BIO* bio)
+ {
+ // XXX: Dummy function to avoid a memory leak in OpenSSL.
+ // The memory leak happens in BIO_free() (bio_lib.c) when the destroy func of the BIO is NULL.
+ // This is fixed in OpenSSL but some distros still ship the unpatched version hence we provide this workaround.
+ return 1;
+ }
+
+ static long ctrl(BIO* bio, int cmd, long num, void* ptr)
+ {
+ if (cmd == BIO_CTRL_FLUSH)
+ return 1;
+ return 0;
+ }
+
+ static int read(BIO* bio, char* buf, int len);
+ static int write(BIO* bio, const char* buf, int len);
+ }
+}
+
+static BIO_METHOD biomethods =
+{
+ (100 | BIO_TYPE_SOURCE_SINK),
+ "inspircd",
+ OpenSSL::BIOMethod::write,
+ OpenSSL::BIOMethod::read,
+ NULL, // puts
+ NULL, // gets
+ OpenSSL::BIOMethod::ctrl,
+ OpenSSL::BIOMethod::create,
+ OpenSSL::BIOMethod::destroy, // destroy, does nothing, see function body for more info
+ NULL // callback_ctrl
+};
+
+static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
+{
+ /* XXX: This will allow self signed certificates.
+ * In the future if we want an option to not allow this,
+ * we can just return preverify_ok here, and openssl
+ * will boot off self-signed and invalid peer certs.
+ */
+ int ve = X509_STORE_CTX_get_error(ctx);
+
+ SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
+
+ return 1;
+}
+
+class OpenSSLIOHook : public SSLIOHook
+{
+ private:
+ SSL* sess;
+ issl_status status;
+ bool data_to_write;
+ reference<OpenSSL::Profile> profile;
+
+ // Returns 1 if handshake succeeded, 0 if it is still in progress, -1 if it failed
+ int Handshake(StreamSocket* user)
+ {
+ ERR_clear_error();
+ int ret = SSL_do_handshake(sess);
+ if (ret < 0)
+ {
+ int err = SSL_get_error(sess, ret);
+
+ if (err == SSL_ERROR_WANT_READ)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+ this->status = ISSL_HANDSHAKING;
+ return 0;
+ }
+ else if (err == SSL_ERROR_WANT_WRITE)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
+ this->status = ISSL_HANDSHAKING;
+ return 0;
+ }
+ else
+ {
+ CloseSession();
+ return -1;
+ }
+ }
+ else if (ret > 0)
+ {
+ // Handshake complete.
+ VerifyCertificate();
+
+ status = ISSL_OPEN;
+
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
+
+ return 1;
+ }
+ else if (ret == 0)
+ {
+ CloseSession();
+ }
+ return -1;
+ }
+
+ void CloseSession()
+ {
+ if (sess)
+ {
+ SSL_shutdown(sess);
+ SSL_free(sess);
+ }
+ sess = NULL;
+ certificate = NULL;
+ status = ISSL_NONE;
+ }
+
+ void VerifyCertificate()
+ {
+ X509* cert;
+ ssl_cert* certinfo = new ssl_cert;
+ this->certificate = certinfo;
+ unsigned int n;
+ unsigned char md[EVP_MAX_MD_SIZE];
+
+ cert = SSL_get_peer_certificate(sess);
+
+ if (!cert)
+ {
+ certinfo->error = "Could not get peer certificate: "+std::string(get_error());
+ return;
+ }
+
+ certinfo->invalid = (SSL_get_verify_result(sess) != X509_V_OK);
+
+ if (!SelfSigned)
+ {
+ certinfo->unknownsigner = false;
+ certinfo->trusted = true;
+ }
+ else
+ {
+ certinfo->unknownsigner = true;
+ certinfo->trusted = false;
+ }
+
+ char buf[512];
+ X509_NAME_oneline(X509_get_subject_name(cert), buf, sizeof(buf));
+ certinfo->dn = buf;
+ // Make sure there are no chars in the string that we consider invalid
+ if (certinfo->dn.find_first_of("\r\n") != std::string::npos)
+ certinfo->dn.clear();
+
+ X509_NAME_oneline(X509_get_issuer_name(cert), buf, sizeof(buf));
+ certinfo->issuer = buf;
+ if (certinfo->issuer.find_first_of("\r\n") != std::string::npos)
+ certinfo->issuer.clear();
+
+ if (!X509_digest(cert, profile->GetDigest(), md, &n))
+ {
+ certinfo->error = "Out of memory generating fingerprint";
+ }
+ else
+ {
+ certinfo->fingerprint = BinToHex(md, n);
+ }
+
+ if ((ASN1_UTCTIME_cmp_time_t(X509_get_notAfter(cert), ServerInstance->Time()) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_get_notBefore(cert), ServerInstance->Time()) == 0))
+ {
+ certinfo->error = "Not activated, or expired certificate";
+ }
+
+ X509_free(cert);
+ }
+
+ void SSLInfoCallback(int where, int rc)
+ {
+ if ((where & SSL_CB_HANDSHAKE_START) && (status == ISSL_OPEN))
+ {
+ if (profile->AllowRenegotiation())
+ return;
+
+ // The other side is trying to renegotiate, kill the connection and change status
+ // to ISSL_NONE so CheckRenego() closes the session
+ status = ISSL_NONE;
+ BIO* bio = SSL_get_rbio(sess);
+ EventHandler* eh = static_cast<StreamSocket*>(bio->ptr);
+ SocketEngine::Shutdown(eh, 2);
+ }
+ }
+
+ bool CheckRenego(StreamSocket* sock)
+ {
+ if (status != ISSL_NONE)
+ return true;
+
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Session %p killed, attempted to renegotiate", (void*)sess);
+ CloseSession();
+ sock->SetError("Renegotiation is not allowed");
+ return false;
+ }
+
+ // Returns 1 if application I/O should proceed, 0 if it must wait for the underlying protocol to progress, -1 on fatal error
+ int PrepareIO(StreamSocket* sock)
+ {
+ if (status == ISSL_OPEN)
+ return 1;
+ else if (status == ISSL_HANDSHAKING)
+ {
+ // The handshake isn't finished, try to finish it
+ return Handshake(sock);
+ }
+
+ CloseSession();
+ return -1;
+ }
+
+ // Calls our private SSLInfoCallback()
+ friend void StaticSSLInfoCallback(const SSL* ssl, int where, int rc);
+
+ public:
+ OpenSSLIOHook(IOHookProvider* hookprov, StreamSocket* sock, SSL* session, const reference<OpenSSL::Profile>& sslprofile)
+ : SSLIOHook(hookprov)
+ , sess(session)
+ , status(ISSL_NONE)
+ , data_to_write(false)
+ , profile(sslprofile)
+ {
+ // Create BIO instance and store a pointer to the socket in it which will be used by the read and write functions
+ BIO* bio = BIO_new(&biomethods);
+ bio->ptr = sock;
+ SSL_set_bio(sess, bio, bio);
+
+ SSL_set_ex_data(sess, exdataindex, this);
+ sock->AddIOHook(this);
+ Handshake(sock);
+ }
+
+ void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
+ {
+ CloseSession();
+ }
+
+ int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
+ {
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
+
+ // If we resumed the handshake then this->status will be ISSL_OPEN
+ {
+ ERR_clear_error();
+ char* buffer = ServerInstance->GetReadBuffer();
+ size_t bufsiz = ServerInstance->Config->NetBufferSize;
+ int ret = SSL_read(sess, buffer, bufsiz);
+
+ if (!CheckRenego(user))
+ return -1;
+
+ if (ret > 0)
+ {
+ recvq.append(buffer, ret);
+ if (data_to_write)
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
+ return 1;
+ }
+ else if (ret == 0)
+ {
+ // Client closed connection.
+ CloseSession();
+ user->SetError("Connection closed");
+ return -1;
+ }
+ else // if (ret < 0)
+ {
+ int err = SSL_get_error(sess, ret);
+
+ if (err == SSL_ERROR_WANT_READ)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ);
+ return 0;
+ }
+ else if (err == SSL_ERROR_WANT_WRITE)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else
+ {
+ CloseSession();
+ return -1;
+ }
+ }
+ }
+ }
+
+ int OnStreamSocketWrite(StreamSocket* user) CXX11_OVERRIDE
+ {
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
+
+ data_to_write = true;
+
+ // Session is ready for transferring application data
+ StreamSocket::SendQueue& sendq = user->GetSendQ();
+ while (!sendq.empty())
+ {
+ ERR_clear_error();
+ FlattenSendQueue(sendq, profile->GetOutgoingRecordSize());
+ const StreamSocket::SendQueue::Element& buffer = sendq.front();
+ int ret = SSL_write(sess, buffer.data(), buffer.size());
+
+ if (!CheckRenego(user))
+ return -1;
+
+ if (ret == (int)buffer.length())
+ {
+ // Wrote entire record, continue sending
+ sendq.pop_front();
+ }
+ else if (ret > 0)
+ {
+ sendq.erase_front(ret);
+ SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else if (ret == 0)
+ {
+ CloseSession();
+ return -1;
+ }
+ else // if (ret < 0)
+ {
+ int err = SSL_get_error(sess, ret);
+
+ if (err == SSL_ERROR_WANT_WRITE)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else if (err == SSL_ERROR_WANT_READ)
+ {
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ);
+ return 0;
+ }
+ else
+ {
+ CloseSession();
+ return -1;
+ }
+ }
+ }
+
+ data_to_write = false;
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+ return 1;
+ }
+
+ void TellCiphersAndFingerprint(LocalUser* user)
+ {
+ if (sess)
+ {
+ std::string text = "*** You are connected using SSL cipher '";
+ GetCiphersuite(text);
+ text += '\'';
+ const std::string& fingerprint = certificate->fingerprint;
+ if (!fingerprint.empty())
+ text += " and your SSL certificate fingerprint is " + fingerprint;
+
+ user->WriteNotice(text);
+ }
+ }
+
+ void GetCiphersuite(std::string& out) const
+ {
+ out.append(SSL_get_version(sess)).push_back('-');
+ out.append(SSL_get_cipher(sess));
+ }
+
+ bool IsHandshakeDone() const { return (status == ISSL_OPEN); }
+};
+
+static void StaticSSLInfoCallback(const SSL* ssl, int where, int rc)
+{
+ OpenSSLIOHook* hook = static_cast<OpenSSLIOHook*>(SSL_get_ex_data(ssl, exdataindex));
+ hook->SSLInfoCallback(where, rc);
+}
+
+static int OpenSSL::BIOMethod::write(BIO* bio, const char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
+
+ StreamSocket* sock = static_cast<StreamSocket*>(bio->ptr);
+ if (sock->GetEventMask() & FD_WRITE_WILL_BLOCK)
+ {
+ // Writes blocked earlier, don't retry syscall
+ BIO_set_retry_write(bio);
+ return -1;
+ }
+
+ int ret = SocketEngine::Send(sock, buffer, size, 0);
+ if ((ret < size) && ((ret > 0) || (SocketEngine::IgnoreError())))
+ {
+ // Blocked, set retry flag for OpenSSL
+ SocketEngine::ChangeEventMask(sock, FD_WRITE_WILL_BLOCK);
+ BIO_set_retry_write(bio);
+ }
+
+ return ret;
+}
+
+static int OpenSSL::BIOMethod::read(BIO* bio, char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
+
+ StreamSocket* sock = static_cast<StreamSocket*>(bio->ptr);
+ if (sock->GetEventMask() & FD_READ_WILL_BLOCK)
+ {
+ // Reads blocked earlier, don't retry syscall
+ BIO_set_retry_read(bio);
+ return -1;
+ }
+
+ int ret = SocketEngine::Recv(sock, buffer, size, 0);
+ if ((ret < size) && ((ret > 0) || (SocketEngine::IgnoreError())))
+ {
+ // Blocked, set retry flag for OpenSSL
+ SocketEngine::ChangeEventMask(sock, FD_READ_WILL_BLOCK);
+ BIO_set_retry_read(bio);
+ }
+
+ return ret;
+}
+
+class OpenSSLIOHookProvider : public refcountbase, public IOHookProvider
+{
+ reference<OpenSSL::Profile> profile;
+
+ public:
+ OpenSSLIOHookProvider(Module* mod, reference<OpenSSL::Profile>& prof)
+ : IOHookProvider(mod, "ssl/" + prof->GetName(), IOHookProvider::IOH_SSL)
+ , profile(prof)
+ {
+ ServerInstance->Modules->AddService(*this);
+ }
+
+ ~OpenSSLIOHookProvider()
+ {
+ ServerInstance->Modules->DelService(*this);
+ }
+
+ void OnAccept(StreamSocket* sock, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
+ {
+ new OpenSSLIOHook(this, sock, profile->CreateServerSession(), profile);
+ }
+
+ void OnConnect(StreamSocket* sock) CXX11_OVERRIDE
+ {
+ new OpenSSLIOHook(this, sock, profile->CreateClientSession(), profile);
+ }
+};
+
+class ModuleSSLOpenSSL : public Module
+{
+ typedef std::vector<reference<OpenSSLIOHookProvider> > ProfileList;
+
+ ProfileList profiles;
+
+ void ReadProfiles()
+ {
+ ProfileList newprofiles;
+ ConfigTagList tags = ServerInstance->Config->ConfTags("sslprofile");
+ if (tags.first == tags.second)
+ {
+ // Create a default profile named "openssl"
+ const std::string defname = "openssl";
+ ConfigTag* tag = ServerInstance->Config->ConfValue(defname);
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "No <sslprofile> tags found, using settings from the <openssl> tag");
+
+ try
+ {
+ reference<OpenSSL::Profile> profile(new OpenSSL::Profile(defname, tag));
+ newprofiles.push_back(new OpenSSLIOHookProvider(this, profile));
+ }
+ catch (OpenSSL::Exception& ex)
+ {
+ throw ModuleException("Error while initializing the default SSL profile - " + ex.GetReason());
+ }
+ }
+
+ for (ConfigIter i = tags.first; i != tags.second; ++i)
+ {
+ ConfigTag* tag = i->second;
+ if (tag->getString("provider") != "openssl")
+ continue;
+
+ std::string name = tag->getString("name");
+ if (name.empty())
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring <sslprofile> tag without name at " + tag->getTagLocation());
+ continue;
+ }
+
+ reference<OpenSSL::Profile> profile;
+ try
+ {
+ profile = new OpenSSL::Profile(name, tag);
+ }
+ catch (CoreException& ex)
+ {
+ throw ModuleException("Error while initializing SSL profile \"" + name + "\" at " + tag->getTagLocation() + " - " + ex.GetReason());
+ }
+
+ newprofiles.push_back(new OpenSSLIOHookProvider(this, profile));
+ }
+
+ profiles.swap(newprofiles);
+ }
+
+ public:
+ ModuleSSLOpenSSL()
+ {
+ // Initialize OpenSSL
+ SSL_library_init();
+ SSL_load_error_strings();
+ }
+
+ void init() CXX11_OVERRIDE
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "OpenSSL lib version \"%s\" module was compiled for \"" OPENSSL_VERSION_TEXT "\"", SSLeay_version(SSLEAY_VERSION));
+
+ // Register application specific data
+ char exdatastr[] = "inspircd";
+ exdataindex = SSL_get_ex_new_index(0, exdatastr, NULL, NULL, NULL);
+ if (exdataindex < 0)
+ throw ModuleException("Failed to register application specific data");
+
+ ReadProfiles();
+ }
+
+ void OnModuleRehash(User* user, const std::string ¶m) CXX11_OVERRIDE
+ {
+ if (param != "ssl")
+ return;
+
+ try
+ {
+ ReadProfiles();
+ }
+ catch (ModuleException& ex)
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason() + " Not applying settings.");
+ }
+ }
+
+ void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
+ {
+ IOHook* hook = user->eh.GetIOHook();
+ if (hook && hook->prov->creator == this)
+ static_cast<OpenSSLIOHook*>(hook)->TellCiphersAndFingerprint(user);
+ }
+
+ void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
+ {
+ if (target_type == TYPE_USER)
+ {
+ LocalUser* user = IS_LOCAL((User*)item);
+
+ if (user && user->eh.GetIOHook() && user->eh.GetIOHook()->prov->creator == 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");
+ }
+ }
+ }
+
+ ModResult OnCheckReady(LocalUser* user) CXX11_OVERRIDE
+ {
+ if ((user->eh.GetIOHook()) && (user->eh.GetIOHook()->prov->creator == this))
+ {
+ OpenSSLIOHook* iohook = static_cast<OpenSSLIOHook*>(user->eh.GetIOHook());
+ if (!iohook->IsHandshakeDone())
+ return MOD_RES_DENY;
+ }
+
+ return MOD_RES_PASSTHRU;
+ }
+
+ Version GetVersion() CXX11_OVERRIDE
+ {
+ return Version("Provides SSL support for clients", VF_VENDOR);
+ }
+};
+
+MODULE_INIT(ModuleSSLOpenSSL)
projects / user / henk / code / inspircd.git / blobdiff