-/* +------------------------------------+\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
+/* +------------------------------------+
+ * | Inspire Internet Relay Chat Daemon |
+ * +------------------------------------+
+ *
+ * InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
+ *
+ * This program is free but copyrighted software; see
+ * the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include <openssl/ssl.h>
+#include <openssl/err.h>
+#include "transport.h"
+
+#ifdef WINDOWS
+#pragma comment(lib, "libeay32MTd")
+#pragma comment(lib, "ssleay32MTd")
+#undef MAX_DESCRIPTORS
+#define MAX_DESCRIPTORS 10000
+#endif
+
+/* $ModDesc: Provides SSL support for clients */
+
+/* $LinkerFlags: if("USE_FREEBSD_BASE_SSL") -lssl -lcrypto */
+/* $CompileFlags: if(!"USE_FREEBSD_BASE_SSL") pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
+/* $LinkerFlags: if(!"USE_FREEBSD_BASE_SSL") rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
+
+/* $ModDep: transport.h */
+/* $NoPedantic */
+/* $CopyInstall: conf/key.pem $(CONPATH) */
+/* $CopyInstall: conf/cert.pem $(CONPATH) */
+
+
+enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
+enum issl_io_status { ISSL_WRITE, ISSL_READ };
+
+static bool SelfSigned = false;
+
+bool isin(const std::string &host, int port, const std::vector<std::string> &portlist)
+{
+ if (std::find(portlist.begin(), portlist.end(), "*:" + ConvToStr(port)) != portlist.end())
+ return true;
+
+ if (std::find(portlist.begin(), portlist.end(), ":" + ConvToStr(port)) != portlist.end())
+ return true;
+
+ return std::find(portlist.begin(), portlist.end(), host + ":" + ConvToStr(port)) != portlist.end();
+}
+
+char* get_error()
+{
+ return ERR_error_string(ERR_get_error(), NULL);
+}
+
+static int error_callback(const char *str, size_t len, void *u);
+
+/** Represents an SSL user's extra data
+ */
+class issl_session : public classbase
+{
+public:
+ SSL* sess;
+ issl_status status;
+ issl_io_status rstat;
+ issl_io_status wstat;
+
+ unsigned int inbufoffset;
+ char* inbuf; // Buffer OpenSSL reads into.
+ std::string outbuf; // Buffer for outgoing data that OpenSSL will not take.
+ int fd;
+ bool outbound;
+
+ issl_session()
+ {
+ outbound = false;
+ rstat = ISSL_READ;
+ wstat = ISSL_WRITE;
+ }
+};
+
+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 ModuleSSLOpenSSL : public Module
+{
+ std::vector<std::string> listenports;
+
+ int inbufsize;
+ issl_session* sessions;
+
+ SSL_CTX* ctx;
+ SSL_CTX* clictx;
+
+ char* dummy;
+ char cipher[MAXBUF];
+
+ std::string keyfile;
+ std::string certfile;
+ std::string cafile;
+ // std::string crlfile;
+ std::string dhfile;
+ std::string sslports;
+
+ int clientactive;
+
+ public:
+
+ InspIRCd* PublicInstance;
+
+ ModuleSSLOpenSSL(InspIRCd* Me)
+ : Module(Me), PublicInstance(Me)
+ {
+ 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;
+
+ /* Global SSL library initialization*/
+ SSL_library_init();
+ SSL_load_error_strings();
+
+ /* Build our SSL contexts:
+ * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
+ */
+ ctx = SSL_CTX_new( SSLv23_server_method() );
+ clictx = SSL_CTX_new( SSLv23_client_method() );
+
+ SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+ SSL_CTX_set_mode(clictx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
+
+ SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
+ SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
+
+ // Needs the flag as it ignores a plain /rehash
+ OnModuleRehash(NULL,"ssl");
+ Implementation eventlist[] = { I_OnRawSocketConnect, I_OnRawSocketAccept,
+ I_OnRawSocketClose, I_OnRawSocketRead, I_OnRawSocketWrite, I_OnCleanup, I_On005Numeric,
+ I_OnBufferFlushed, I_OnRequest, I_OnUnloadModule, I_OnRehash, I_OnModuleRehash,
+ I_OnPostConnect, I_OnHookIO };
+ ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
+ }
+
+ virtual void OnHookIO(EventHandler* user, ListenSocketBase* lsb)
+ {
+ if (!user->GetIOHook() && isin(lsb->GetIP(),lsb->GetPort(),listenports))
+ {
+ /* Hook the user with our module */
+ user->AddIOHook(this);
+ }
+ }
+
+ virtual void OnRehash(User* user)
+ {
+ ConfigReader Conf(ServerInstance);
+
+ listenports.clear();
+ clientactive = 0;
+ sslports.clear();
+
+ for(int index = 0; index < Conf.Enumerate("bind"); index++)
+ {
+ // For each <bind> tag
+ std::string x = Conf.ReadValue("bind", "type", index);
+ if(((x.empty()) || (x == "clients")) && (Conf.ReadValue("bind", "ssl", index) == "openssl"))
+ {
+ // 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);
+
+ if (!addr.empty())
+ {
+ // normalize address, important for IPv6
+ int portint = 0;
+ irc::sockets::sockaddrs bin;
+ if (irc::sockets::aptosa(addr.c_str(), portint, &bin))
+ irc::sockets::satoap(&bin, addr, portint);
+ }
+
+ 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->ports.size(); i++)
+ if ((ServerInstance->ports[i]->GetPort() == portno) && (ServerInstance->ports[i]->GetIP() == addr))
+ ServerInstance->ports[i]->SetDescription("ssl");
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %ld", portno);
+
+ if (addr != "127.0.0.1")
+ sslports.append((addr.empty() ? "*" : addr)).append(":").append(ConvToStr(portno)).append(";");
+ }
+ catch (ModuleException &e)
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.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());
+ }
+ }
+ }
+ }
+
+ if (!sslports.empty())
+ sslports.erase(sslports.end() - 1);
+ }
+
+ virtual void OnModuleRehash(User* user, const std::string ¶m)
+ {
+ if (param != "ssl")
+ return;
+
+ OnRehash(user);
+
+ ConfigReader Conf(ServerInstance);
+
+ std::string confdir(ServerInstance->ConfigFileName);
+ // +1 so we the path ends with a /
+ confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
+
+ cafile = Conf.ReadValue("openssl", "cafile", 0);
+ certfile = Conf.ReadValue("openssl", "certfile", 0);
+ keyfile = Conf.ReadValue("openssl", "keyfile", 0);
+ dhfile = Conf.ReadValue("openssl", "dhfile", 0);
+
+ // Set all the default values needed.
+ if (cafile.empty())
+ cafile = "ca.pem";
+
+ if (certfile.empty())
+ certfile = "cert.pem";
+
+ if (keyfile.empty())
+ keyfile = "key.pem";
+
+ if (dhfile.empty())
+ dhfile = "dhparams.pem";
+
+ // Prepend relative paths with the path to the config directory.
+ if ((cafile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(cafile)))
+ cafile = confdir + cafile;
+
+ if ((certfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(certfile)))
+ certfile = confdir + certfile;
+
+ if ((keyfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(keyfile)))
+ keyfile = confdir + keyfile;
+
+ if ((dhfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(dhfile)))
+ dhfile = confdir + dhfile;
+
+ /* Load our keys and certificates
+ * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
+ */
+ if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
+ ERR_print_errors_cb(error_callback, this);
+ }
+
+ 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)))
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
+ ERR_print_errors_cb(error_callback, this);
+ }
+
+ /* Load the CAs we trust*/
+ if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));
+ ERR_print_errors_cb(error_callback, this);
+ }
+
+ FILE* dhpfile = fopen(dhfile.c_str(), "r");
+ DH* ret;
+
+ if (dhpfile == NULL)
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
+ throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
+ }
+ else
+ {
+ ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
+ if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
+ ERR_print_errors_cb(error_callback, this);
+ }
+ }
+
+ fclose(dhpfile);
+ }
+
+ virtual void On005Numeric(std::string &output)
+ {
+ output.append(" SSL=" + sslports);
+ }
+
+ virtual ~ModuleSSLOpenSSL()
+ {
+ SSL_CTX_free(ctx);
+ SSL_CTX_free(clictx);
+ ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this);
+ delete[] sessions;
+ }
+
+ virtual void OnCleanup(int target_type, void* item)
+ {
+ if (target_type == TYPE_USER)
+ {
+ User* user = (User*)item;
+
+ if (user->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)
+ {
+ if (mod == this)
+ {
+ for(unsigned int i = 0; i < listenports.size(); i++)
+ {
+ for (size_t j = 0; j < ServerInstance->ports.size(); j++)
+ if (listenports[i] == (ServerInstance->ports[j]->GetIP()+":"+ConvToStr(ServerInstance->ports[j]->GetPort())))
+ ServerInstance->ports[j]->SetDescription("plaintext");
+ }
+ }
+ }
+
+ virtual Version GetVersion()
+ {
+ return Version("$Id$", VF_VENDOR, API_VERSION);
+ }
+
+
+ virtual const char* OnRequest(Request* request)
+ {
+ ISHRequest* ISR = (ISHRequest*)request;
+ if (strcmp("IS_NAME", request->GetId()) == 0)
+ {
+ return "openssl";
+ }
+ 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 (ISR->Sock->GetFd() < 0)
+ return "OK";
+
+ issl_session* session = &sessions[ISR->Sock->GetFd()];
+ return (session->status == ISSL_HANDSHAKING) ? NULL : "OK";
+ }
+ else if (strcmp("IS_ATTACH", request->GetId()) == 0)
+ {
+ issl_session* session = &sessions[ISR->Sock->GetFd()];
+ if (session->sess)
+ {
+ VerifyCertificate(session, (BufferedSocket*)ISR->Sock);
+ return "OK";
+ }
+ }
+ else if (strcmp("GET_FP", request->GetId()) == 0)
+ {
+ if (ISR->Sock->GetFd() > -1)
+ {
+ issl_session* session = &sessions[ISR->Sock->GetFd()];
+ if (session->sess)
+ {
+ Extensible* ext = ISR->Sock;
+ ssl_cert* certinfo;
+ if (ext->GetExt("ssl_cert",certinfo))
+ return certinfo->GetFingerprint().c_str();
+ }
+ }
+ }
+ return NULL;
+ }
+
+
+ virtual void OnRawSocketAccept(int fd, 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;
+
+ issl_session* session = &sessions[fd];
+
+ session->fd = fd;
+ session->inbuf = new char[inbufsize];
+ session->inbufoffset = 0;
+ session->sess = SSL_new(ctx);
+ session->status = ISSL_NONE;
+ session->outbound = false;
+
+ if (session->sess == NULL)
+ return;
+
+ if (SSL_set_fd(session->sess, fd) == 0)
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
+ return;
+ }
+
+ Handshake(session);
+ }
+
+ virtual void OnRawSocketConnect(int fd)
+ {
+ /* 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;
+ session->sess = SSL_new(clictx);
+ session->status = ISSL_NONE;
+ session->outbound = true;
+
+ if (session->sess == NULL)
+ return;
+
+ if (SSL_set_fd(session->sess, fd) == 0)
+ {
+ ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
+ return;
+ }
+
+ Handshake(session);
+ }
+
+ virtual void OnRawSocketClose(int fd)
+ {
+ /* 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;
+
+ 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");
+ }
+ }
+
+ virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
+ {
+ /* 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];
+
+ if (!session->sess)
+ {
+ readresult = 0;
+ CloseSession(session);
+ return 1;
+ }
+
+ if (session->status == ISSL_HANDSHAKING)
+ {
+ if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
+ {
+ // The handshake isn't finished and it wants to read, try to finish it.
+ if (!Handshake(session))
+ {
+ // Couldn't resume handshake.
+ errno = session->status == ISSL_NONE ? EIO : EAGAIN;
+ return -1;
+ }
+ }
+ else
+ {
+ errno = EAGAIN;
+ return -1;
+ }
+ }
+
+ // If we resumed the handshake then session->status will be ISSL_OPEN
+
+ if (session->status == ISSL_OPEN)
+ {
+ if (session->wstat == ISSL_READ)
+ {
+ if(DoWrite(session) == 0)
+ return 0;
+ }
+
+ if (session->rstat == ISSL_READ)
+ {
+ int ret = DoRead(session);
+
+ if (ret > 0)
+ {
+ if (count <= session->inbufoffset)
+ {
+ memcpy(buffer, session->inbuf, count);
+ // Move the stuff left in inbuf to the beginning of it
+ memmove(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
+ // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
+ session->inbufoffset -= 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, session->inbufoffset);
+
+ readresult = session->inbufoffset;
+ // Zero the offset, as there's nothing there..
+ session->inbufoffset = 0;
+ }
+ return 1;
+ }
+ return ret;
+ }
+ }
+
+ return -1;
+ }
+
+ virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
+ {
+ /* 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;
+
+ errno = EAGAIN;
+ issl_session* session = &sessions[fd];
+
+ if (!session->sess)
+ {
+ CloseSession(session);
+ return -1;
+ }
+
+ session->outbuf.append(buffer, count);
+ MakePollWrite(session);
+
+ if (session->status == ISSL_HANDSHAKING)
+ {
+ // The handshake isn't finished, try to finish it.
+ if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
+ {
+ if (!Handshake(session))
+ {
+ // Couldn't resume handshake.
+ errno = session->status == ISSL_NONE ? EIO : EAGAIN;
+ return -1;
+ }
+ }
+ }
+
+ if (session->status == ISSL_OPEN)
+ {
+ if (session->rstat == ISSL_WRITE)
+ {
+ DoRead(session);
+ }
+
+ if (session->wstat == ISSL_WRITE)
+ {
+ return DoWrite(session);
+ }
+ }
+
+ return 1;
+ }
+
+ int DoWrite(issl_session* session)
+ {
+ if (!session->outbuf.size())
+ return -1;
+
+ int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
+
+ if (ret == 0)
+ {
+ CloseSession(session);
+ return 0;
+ }
+ else if (ret < 0)
+ {
+ int err = SSL_get_error(session->sess, ret);
+
+ if (err == SSL_ERROR_WANT_WRITE)
+ {
+ session->wstat = ISSL_WRITE;
+ return -1;
+ }
+ else if (err == SSL_ERROR_WANT_READ)
+ {
+ session->wstat = ISSL_READ;
+ return -1;
+ }
+ else
+ {
+ CloseSession(session);
+ return 0;
+ }
+ }
+ else
+ {
+ session->outbuf = session->outbuf.substr(ret);
+ return ret;
+ }
+ }
+
+ int DoRead(issl_session* session)
+ {
+ // 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 = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
+
+ if (ret == 0)
+ {
+ // Client closed connection.
+ CloseSession(session);
+ return 0;
+ }
+ else if (ret < 0)
+ {
+ int err = SSL_get_error(session->sess, ret);
+
+ if (err == SSL_ERROR_WANT_READ)
+ {
+ session->rstat = ISSL_READ;
+ return -1;
+ }
+ else if (err == SSL_ERROR_WANT_WRITE)
+ {
+ session->rstat = ISSL_WRITE;
+ MakePollWrite(session);
+ return -1;
+ }
+ else
+ {
+ CloseSession(session);
+ return 0;
+ }
+ }
+ else
+ {
+ // Read successfully 'ret' bytes into inbuf + inbufoffset
+ // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
+ // 'buffer' is 'count' long
+
+ session->inbufoffset += ret;
+
+ return ret;
+ }
+ }
+
+ bool Handshake(issl_session* session)
+ {
+ int ret;
+
+ if (session->outbound)
+ ret = SSL_connect(session->sess);
+ else
+ ret = SSL_accept(session->sess);
+
+ if (ret < 0)
+ {
+ int err = SSL_get_error(session->sess, ret);
+
+ if (err == SSL_ERROR_WANT_READ)
+ {
+ session->rstat = ISSL_READ;
+ session->status = ISSL_HANDSHAKING;
+ return true;
+ }
+ else if (err == SSL_ERROR_WANT_WRITE)
+ {
+ session->wstat = ISSL_WRITE;
+ session->status = ISSL_HANDSHAKING;
+ MakePollWrite(session);
+ return true;
+ }
+ else
+ {
+ CloseSession(session);
+ }
+
+ return false;
+ }
+ else if (ret > 0)
+ {
+ // Handshake complete.
+ // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
+ EventHandler *u = ServerInstance->SE->GetRef(session->fd);
+ if (u)
+ {
+ u->Extend("ssl");
+ }
+
+ session->status = ISSL_OPEN;
+
+ MakePollWrite(session);
+
+ return true;
+ }
+ else if (ret == 0)
+ {
+ CloseSession(session);
+ return true;
+ }
+
+ return true;
+ }
+
+ virtual void OnPostConnect(User* user)
+ {
+ // This occurs AFTER OnUserConnect so we can be sure the
+ // protocol module has propagated the NICK message.
+ if ((user->GetIOHook() == this) && (IS_LOCAL(user)))
+ {
+ ssl_cert* certdata = VerifyCertificate(&sessions[user->GetFd()], user);
+ if (sessions[user->GetFd()].sess)
+ user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->GetFd()].sess));
+
+ ServerInstance->PI->SendMetaData(user, "ssl", "ON");
+ if (certdata)
+ ServerInstance->PI->SendMetaData(user, "ssl_cert", certdata->GetMetaLine().c_str());
+ }
+ }
+
+ void MakePollWrite(issl_session* session)
+ {
+ //OnRawSocketWrite(session->fd, NULL, 0);
+ EventHandler* eh = ServerInstance->SE->GetRef(session->fd);
+ if (eh)
+ {
+ ServerInstance->SE->WantWrite(eh);
+ }
+ }
+
+ virtual void OnBufferFlushed(User* user)
+ {
+ if (user->GetIOHook() == this)
+ {
+ issl_session* session = &sessions[user->GetFd()];
+ if (session && session->outbuf.size())
+ OnRawSocketWrite(user->GetFd(), NULL, 0);
+ }
+ }
+
+ void CloseSession(issl_session* session)
+ {
+ if (session->sess)
+ {
+ SSL_shutdown(session->sess);
+ SSL_free(session->sess);
+ }
+
+ if (session->inbuf)
+ {
+ delete[] session->inbuf;
+ }
+
+ session->outbuf.clear();
+ session->inbuf = NULL;
+ session->sess = NULL;
+ session->status = ISSL_NONE;
+ errno = EIO;
+ }
+
+ ssl_cert* VerifyCertificate(issl_session* session, Extensible* user)
+ {
+ if (!session->sess || !user)
+ return NULL;
+
+ X509* cert;
+ ssl_cert* certinfo = new ssl_cert;
+ unsigned int n;
+ unsigned char md[EVP_MAX_MD_SIZE];
+ const EVP_MD *digest = EVP_md5();
+
+ user->Extend("ssl_cert",certinfo);
+
+ cert = SSL_get_peer_certificate((SSL*)session->sess);
+
+ if (!cert)
+ {
+ certinfo->error = "Could not get peer certificate: "+std::string(get_error());
+ return certinfo;
+ }
+
+ certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
+
+ if (SelfSigned)
+ {
+ certinfo->unknownsigner = false;
+ certinfo->trusted = true;
+ }
+ else
+ {
+ certinfo->unknownsigner = true;
+ certinfo->trusted = false;
+ }
+
+ certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
+ certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
+
+ if (!X509_digest(cert, digest, md, &n))
+ {
+ certinfo->error = "Out of memory generating fingerprint";
+ }
+ else
+ {
+ certinfo->fingerprint = irc::hex(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);
+ return certinfo;
+ }
+
+ void Prioritize()
+ {
+ Module* server = ServerInstance->Modules->Find("m_spanningtree.so");
+ ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIORITY_AFTER, &server);
+ }
+
+};
+
+static int error_callback(const char *str, size_t len, void *u)
+{
+ ModuleSSLOpenSSL* mssl = (ModuleSSLOpenSSL*)u;
+ mssl->PublicInstance->Logs->Log("m_ssl_openssl",DEFAULT, "SSL error: " + std::string(str, len - 1));
+
+ //
+ // XXX: Remove this line, it causes valgrind warnings...
+ //
+ // MD_update(&m, buf, j);
+ //
+ //
+ // ... ONLY JOKING! :-)
+ //
+
+ return 0;
+}
+
+MODULE_INIT(ModuleSSLOpenSSL)
projects / user / henk / code / inspircd.git / blobdiff