X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fextra%2Fm_ssl_openssl.cpp;h=d8ea16bdf0dcc281a2d2ae5cb86fbd52df855b22;hb=acccaa39641500b8a691db4136e6571102a438ed;hp=03c460be299ddc616a5e5b7855b098507deb26aa;hpb=eaace5ed7cef3a02f905689a1b44a092ca99a6e1;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/extra/m_ssl_openssl.cpp b/src/modules/extra/m_ssl_openssl.cpp index 03c460be2..d8ea16bdf 100644 --- a/src/modules/extra/m_ssl_openssl.cpp +++ b/src/modules/extra/m_ssl_openssl.cpp @@ -1,39 +1,51 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ +/* + * InspIRCd -- Internet Relay Chat Daemon * - * InspIRCd: (C) 2002-2009 InspIRCd Development Team - * See: http://wiki.inspircd.org/Credits + * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2008 Pippijn van Steenhoven + * Copyright (C) 2006-2008 Craig Edwards + * Copyright (C) 2008 Thomas Stagner + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006 Oliver Lupton * - * This program is free but copyrighted software; see - * the file COPYING for details. + * 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 . */ + #include "inspircd.h" -#include -#include -#include "ssl.h" +#include "iohook.h" +#include "modules/ssl.h" -#ifdef WINDOWS -#pragma comment(lib, "libeay32MTd") -#pragma comment(lib, "ssleay32MTd") -#undef MAX_DESCRIPTORS -#define MAX_DESCRIPTORS 10000 +// Ignore OpenSSL deprecation warnings on OS X Lion and newer. +#if defined __APPLE__ +# pragma GCC diagnostic ignored "-Wdeprecated-declarations" #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") */ +#include +#include -/* $ModDep: transport.h */ -/* $NoPedantic */ -/* $CopyInstall: conf/key.pem $(CONPATH) */ -/* $CopyInstall: conf/cert.pem $(CONPATH) */ +#ifdef _WIN32 +# pragma comment(lib, "libcrypto.lib") +# pragma comment(lib, "libssl.lib") +# pragma comment(lib, "user32.lib") +# pragma comment(lib, "advapi32.lib") +# pragma comment(lib, "libgcc.lib") +# pragma comment(lib, "libmingwex.lib") +# pragma comment(lib, "gdi32.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") */ enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN }; @@ -44,372 +56,409 @@ char* get_error() return ERR_error_string(ERR_get_error(), NULL); } -static int error_callback(const char *str, size_t len, void *u); +static int OnVerify(int preverify_ok, X509_STORE_CTX* ctx); -/** Represents an SSL user's extra data - */ -class issl_session +namespace OpenSSL { -public: - SSL* sess; - issl_status status; - reference cert; - - int fd; - bool outbound; - bool data_to_write; - - issl_session() + class Exception : public ModuleException { - outbound = false; - data_to_write = false; - } -}; + public: + Exception(const std::string& reason) + : ModuleException(reason) { } + }; -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 -{ - int inbufsize; - issl_session* sessions; - - SSL_CTX* ctx; - SSL_CTX* clictx; - - char cipher[MAXBUF]; - - std::string keyfile; - std::string certfile; - std::string cafile; - // std::string crlfile; - std::string dhfile; - std::string sslports; - - public: - - ModuleSSLOpenSSL() + class DHParams { - ServerInstance->Modules->PublishInterface("BufferedSocketHook", this); + DH* dh; - 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); + public: + DHParams(const std::string& filename) + { + FILE* dhpfile = fopen(filename.c_str(), "r"); + if (dhpfile == NULL) + throw Exception("Couldn't open DH file " + filename + ": " + strerror(errno)); + + dh = PEM_read_DHparams(dhpfile, NULL, NULL, NULL); + fclose(dhpfile); + if (!dh) + throw Exception("Couldn't read DH params from file " + filename); + } - // Needs the flag as it ignores a plain /rehash - OnModuleRehash(NULL,"ssl"); - Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect }; - ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); - } + ~DHParams() + { + DH_free(dh); + } - void OnHookIO(StreamSocket* user, ListenSocket* lsb) - { - if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl") + DH* get() { - /* Hook the user with our module */ - user->AddIOHook(this); + return dh; } - } + }; - void OnRehash(User* user) + class Context { - ConfigReader Conf; + SSL_CTX* const ctx; - sslports.clear(); + 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. + SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | SSL_OP_CIPHER_SERVER_PREFERENCE); + SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); + SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify); + + const unsigned char session_id[] = "inspircd"; + SSL_CTX_set_session_id_context(ctx, session_id, sizeof(session_id) - 1); + } - for (size_t i = 0; i < ServerInstance->ports.size(); i++) + ~Context() { - ListenSocket* port = ServerInstance->ports[i]; - if (port->bind_tag->getString("ssl") != "openssl") - continue; + SSL_CTX_free(ctx); + } - std::string portid = port->bind_desc; - ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str()); - if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1") - sslports.append(portid).append(";"); + bool SetDH(DHParams& dh) + { + return (SSL_CTX_set_tmp_dh(ctx, dh.get()) >= 0); } - if (!sslports.empty()) - sslports.erase(sslports.end() - 1); - } + bool SetCiphers(const std::string& ciphers) + { + return SSL_CTX_set_cipher_list(ctx, ciphers.c_str()); + } - void OnModuleRehash(User* user, const std::string ¶m) - { - if (param != "ssl") - return; + bool SetCerts(const std::string& filename) + { + return SSL_CTX_use_certificate_chain_file(ctx, filename.c_str()); + } - OnRehash(user); + bool SetPrivateKey(const std::string& filename) + { + return SSL_CTX_use_PrivateKey_file(ctx, filename.c_str(), SSL_FILETYPE_PEM); + } - ConfigReader Conf; + bool SetCA(const std::string& filename) + { + return SSL_CTX_load_verify_locations(ctx, filename.c_str(), 0); + } - cafile = Conf.ReadValue("openssl", "cafile", 0); - certfile = Conf.ReadValue("openssl", "certfile", 0); - keyfile = Conf.ReadValue("openssl", "keyfile", 0); - dhfile = Conf.ReadValue("openssl", "dhfile", 0); + SSL* CreateSession() + { + return SSL_new(ctx); + } + }; - // Set all the default values needed. - if (cafile.empty()) - cafile = "conf/ca.pem"; + class Profile : public refcountbase + { + /** Name of this profile + */ + const std::string name; - if (certfile.empty()) - certfile = "conf/cert.pem"; + /** DH parameters in use + */ + DHParams dh; - if (keyfile.empty()) - keyfile = "conf/key.pem"; + /** OpenSSL makes us have two contexts, one for servers and one for clients + */ + Context ctx; + Context clictx; - if (dhfile.empty()) - dhfile = "conf/dhparams.pem"; + /** Digest to use when generating fingerprints + */ + const EVP_MD* digest; - /* Load our keys and certificates - * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck. + /** Last error, set by error_callback() */ - 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); - } + std::string lasterr; - 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))) + static int error_callback(const char* str, size_t len, void* u) { - 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); + Profile* profile = reinterpret_cast(u); + profile->lasterr = std::string(str, len - 1); + return 0; } - /* 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))) + 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())) { - 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); - } + if ((!ctx.SetDH(dh)) || (!clictx.SetDH(dh))) + throw Exception("Couldn't set DH parameters"); - FILE* dhpfile = fopen(dhfile.c_str(), "r"); - DH* ret; + std::string hash = tag->getString("hash", "md5"); + digest = EVP_get_digestbyname(hash.c_str()); + if (digest == NULL) + throw Exception("Unknown hash type " + hash); - 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)) + 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); + } + } + + /* 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))) { - 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); + 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()); } } - fclose(dhpfile); - } + const std::string& GetName() const { return name; } + SSL* CreateServerSession() { return ctx.CreateSession(); } + SSL* CreateClientSession() { return clictx.CreateSession(); } + const EVP_MD* GetDigest() { return digest; } + }; +} - void On005Numeric(std::string &output) - { - if (!sslports.empty()) - output.append(" SSL=" + sslports); - } +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); - ~ModuleSSLOpenSSL() - { - SSL_CTX_free(ctx); - SSL_CTX_free(clictx); - ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this); - delete[] sessions; - } + SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT); + + return 1; +} + +class OpenSSLIOHook : public SSLIOHook +{ + private: + SSL* sess; + issl_status status; + const bool outbound; + bool data_to_write; + reference profile; - void OnUserConnect(LocalUser* user) + bool Handshake(StreamSocket* user) { - if (user->eh.GetIOHook() == this) + int ret; + + if (outbound) + ret = SSL_connect(sess); + else + ret = SSL_accept(sess); + + if (ret < 0) { - if (sessions[user->GetFd()].sess) + int err = SSL_get_error(sess, ret); + + if (err == SSL_ERROR_WANT_READ) { - SSLCertSubmission(user, this, ServerInstance->Modules->Find("m_sslinfo.so"), sessions[user->GetFd()].cert); + SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); + this->status = ISSL_HANDSHAKING; + return true; + } + else if (err == SSL_ERROR_WANT_WRITE) + { + SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE); + this->status = ISSL_HANDSHAKING; + return true; + } + else + { + CloseSession(); } - } - } - void OnCleanup(int target_type, void* item) - { - if (target_type == TYPE_USER) + return false; + } + else if (ret > 0) { - LocalUser* user = IS_LOCAL((User*)item); + // Handshake complete. + VerifyCertificate(); - if (user && user->eh.GetIOHook() == this) - { - // User is using SSL, they're a local user, and they're using one of *our* SSL ports. - // Potentially there could be multiple SSL modules loaded at once on different ports. - ServerInstance->Users->QuitUser(user, "SSL module unloading"); - } + status = ISSL_OPEN; + + SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE); + + return true; + } + else if (ret == 0) + { + CloseSession(); + return true; } - } - Version GetVersion() - { - return Version("Provides SSL support for clients", VF_VENDOR); + return true; } - void OnRequest(Request& request) + void CloseSession() { - if (strcmp("GET_SSL_CERT", request.id) == 0) + if (sess) { - SocketCertificateRequest& req = static_cast(request); - int fd = req.sock->GetFd(); - issl_session* session = &sessions[fd]; - - req.cert = session->cert; + SSL_shutdown(sess); + SSL_free(sess); } + sess = NULL; + certificate = NULL; + status = ISSL_NONE; + errno = EIO; } - void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) + void VerifyCertificate() { - int fd = user->GetFd(); - - issl_session* session = &sessions[fd]; - - session->fd = fd; - session->sess = SSL_new(ctx); - session->status = ISSL_NONE; - session->outbound = false; + X509* cert; + ssl_cert* certinfo = new ssl_cert; + this->certificate = certinfo; + unsigned int n; + unsigned char md[EVP_MAX_MD_SIZE]; - if (session->sess == NULL) - return; + cert = SSL_get_peer_certificate(sess); - if (SSL_set_fd(session->sess, fd) == 0) + if (!cert) { - ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd); + certinfo->error = "Could not get peer certificate: "+std::string(get_error()); return; } - Handshake(user, session); - } - - void OnStreamSocketConnect(StreamSocket* user) - { - int fd = user->GetFd(); - /* 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; + certinfo->invalid = (SSL_get_verify_result(sess) != X509_V_OK); - issl_session* session = &sessions[fd]; + if (!SelfSigned) + { + certinfo->unknownsigner = false; + certinfo->trusted = true; + } + else + { + certinfo->unknownsigner = true; + certinfo->trusted = false; + } - session->fd = fd; - session->sess = SSL_new(clictx); - session->status = ISSL_NONE; - session->outbound = true; + char buf[512]; + X509_NAME_oneline(X509_get_subject_name(cert), buf, sizeof(buf)); + certinfo->dn = buf; + X509_NAME_oneline(X509_get_issuer_name(cert), buf, sizeof(buf)); + certinfo->issuer = buf; - if (session->sess == NULL) - return; + if (!X509_digest(cert, profile->GetDigest(), md, &n)) + { + certinfo->error = "Out of memory generating fingerprint"; + } + else + { + certinfo->fingerprint = BinToHex(md, n); + } - if (SSL_set_fd(session->sess, fd) == 0) + 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)) { - ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd); - return; + certinfo->error = "Not activated, or expired certificate"; } - Handshake(user, session); + X509_free(cert); } - void OnStreamSocketClose(StreamSocket* user) + public: + OpenSSLIOHook(IOHookProvider* hookprov, StreamSocket* sock, bool is_outbound, SSL* session, const reference& sslprofile) + : SSLIOHook(hookprov) + , sess(session) + , status(ISSL_NONE) + , outbound(is_outbound) + , data_to_write(false) + , profile(sslprofile) { - int fd = user->GetFd(); - /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */ - if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1)) + if (sess == NULL) return; + if (SSL_set_fd(sess, sock->GetFd()) == 0) + throw ModuleException("Can't set fd with SSL_set_fd: " + ConvToStr(sock->GetFd())); - CloseSession(&sessions[fd]); + sock->AddIOHook(this); + Handshake(sock); } - int OnStreamSocketRead(StreamSocket* user, std::string& recvq) + void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE { - int fd = user->GetFd(); - /* 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 -1; - - issl_session* session = &sessions[fd]; + CloseSession(); + } - if (!session->sess) + int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE + { + if (!sess) { - CloseSession(session); + CloseSession(); return -1; } - if (session->status == ISSL_HANDSHAKING) + if (status == ISSL_HANDSHAKING) { // The handshake isn't finished and it wants to read, try to finish it. - if (!Handshake(user, session)) + if (!Handshake(user)) { // Couldn't resume handshake. - if (session->status == ISSL_NONE) + if (status == ISSL_NONE) return -1; return 0; } } - // If we resumed the handshake then session->status will be ISSL_OPEN + // If we resumed the handshake then this->status will be ISSL_OPEN - if (session->status == ISSL_OPEN) + if (status == ISSL_OPEN) { char* buffer = ServerInstance->GetReadBuffer(); size_t bufsiz = ServerInstance->Config->NetBufferSize; - int ret = SSL_read(session->sess, buffer, bufsiz); - + int ret = SSL_read(sess, buffer, bufsiz); + 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(session); + CloseSession(); + user->SetError("Connection closed"); return -1; } else if (ret < 0) { - int err = SSL_get_error(session->sess, ret); + int err = SSL_get_error(sess, ret); if (err == SSL_ERROR_WANT_READ) { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ); + SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ); return 0; } else if (err == SSL_ERROR_WANT_WRITE) { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE); + SocketEngine::ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE); return 0; } else { - CloseSession(session); + CloseSession(); return -1; } } @@ -418,68 +467,64 @@ class ModuleSSLOpenSSL : public Module return 0; } - int OnStreamSocketWrite(StreamSocket* user, std::string& buffer) + int OnStreamSocketWrite(StreamSocket* user, std::string& buffer) CXX11_OVERRIDE { - int fd = user->GetFd(); - - issl_session* session = &sessions[fd]; - - if (!session->sess) + if (!sess) { - CloseSession(session); + CloseSession(); return -1; } - session->data_to_write = true; + data_to_write = true; - if (session->status == ISSL_HANDSHAKING) + if (status == ISSL_HANDSHAKING) { - if (!Handshake(user, session)) + if (!Handshake(user)) { // Couldn't resume handshake. - if (session->status == ISSL_NONE) + if (status == ISSL_NONE) return -1; return 0; } } - if (session->status == ISSL_OPEN) + if (status == ISSL_OPEN) { - int ret = SSL_write(session->sess, buffer.data(), buffer.size()); + int ret = SSL_write(sess, buffer.data(), buffer.size()); if (ret == (int)buffer.length()) { - session->data_to_write = false; - ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); + data_to_write = false; + SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); return 1; } else if (ret > 0) { buffer = buffer.substr(ret); - ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE); + SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE); return 0; } else if (ret == 0) { - CloseSession(session); + CloseSession(); return -1; } else if (ret < 0) { - int err = SSL_get_error(session->sess, ret); + int err = SSL_get_error(sess, ret); if (err == SSL_ERROR_WANT_WRITE) { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE); + SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE); return 0; } else if (err == SSL_ERROR_WANT_READ) { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); + SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ); return 0; } else { - CloseSession(session); + CloseSession(); return -1; } } @@ -487,139 +532,159 @@ class ModuleSSLOpenSSL : public Module return 0; } - bool Handshake(StreamSocket* user, issl_session* session) + void TellCiphersAndFingerprint(LocalUser* user) { - int ret; + if (sess) + { + std::string text = "*** You are connected using SSL cipher '" + std::string(SSL_get_cipher(sess)) + "'"; + const std::string& fingerprint = certificate->fingerprint; + if (!fingerprint.empty()) + text += " and your SSL fingerprint is " + fingerprint; - if (session->outbound) - ret = SSL_connect(session->sess); - else - ret = SSL_accept(session->sess); + user->WriteNotice(text); + } + } +}; - if (ret < 0) +class OpenSSLIOHookProvider : public refcountbase, public IOHookProvider +{ + reference profile; + + public: + OpenSSLIOHookProvider(Module* mod, reference& 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, false, profile->CreateServerSession(), profile); + } + + void OnConnect(StreamSocket* sock) CXX11_OVERRIDE + { + new OpenSSLIOHook(this, sock, true, profile->CreateClientSession(), profile); + } +}; + +class ModuleSSLOpenSSL : public Module +{ + typedef std::vector > ProfileList; + + ProfileList profiles; + + void ReadProfiles() + { + ProfileList newprofiles; + ConfigTagList tags = ServerInstance->Config->ConfTags("sslprofile"); + if (tags.first == tags.second) { - int err = SSL_get_error(session->sess, ret); + // Create a default profile named "openssl" + const std::string defname = "openssl"; + ConfigTag* tag = ServerInstance->Config->ConfValue(defname); + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "No tags found, using settings from the tag"); - if (err == SSL_ERROR_WANT_READ) - { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE); - session->status = ISSL_HANDSHAKING; - return true; - } - else if (err == SSL_ERROR_WANT_WRITE) + try { - ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE); - session->status = ISSL_HANDSHAKING; - return true; + reference profile(new OpenSSL::Profile(defname, tag)); + newprofiles.push_back(new OpenSSLIOHookProvider(this, profile)); } - else + catch (OpenSSL::Exception& ex) { - CloseSession(session); + throw ModuleException("Error while initializing the default SSL profile - " + ex.GetReason()); } - - return false; } - else if (ret > 0) + + for (ConfigIter i = tags.first; i != tags.second; ++i) { - // Handshake complete. - VerifyCertificate(session, user); + ConfigTag* tag = i->second; + if (tag->getString("provider") != "openssl") + continue; - session->status = ISSL_OPEN; + std::string name = tag->getString("name"); + if (name.empty()) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring tag without name at " + tag->getTagLocation()); + continue; + } - ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE); + reference profile; + try + { + profile = new OpenSSL::Profile(name, tag); + } + catch (CoreException& ex) + { + throw ModuleException("Error while initializing SSL profile \"" + name + "\" at " + tag->getTagLocation() + " - " + ex.GetReason()); + } - return true; - } - else if (ret == 0) - { - CloseSession(session); - return true; + newprofiles.push_back(new OpenSSLIOHookProvider(this, profile)); } - return true; + profiles.swap(newprofiles); } - void CloseSession(issl_session* session) + public: + ModuleSSLOpenSSL() { - if (session->sess) - { - SSL_shutdown(session->sess); - SSL_free(session->sess); - } - - session->sess = NULL; - session->status = ISSL_NONE; - errno = EIO; + // Initialize OpenSSL + SSL_library_init(); + SSL_load_error_strings(); } - void VerifyCertificate(issl_session* session, StreamSocket* user) + void init() CXX11_OVERRIDE { - if (!session->sess || !user || session->cert) - return; - - X509* cert; - ssl_cert* certinfo = new ssl_cert; - session->cert = certinfo; - unsigned int n; - unsigned char md[EVP_MAX_MD_SIZE]; - const EVP_MD *digest = EVP_md5(); - - cert = SSL_get_peer_certificate((SSL*)session->sess); + ReadProfiles(); + } - if (!cert) - { - certinfo->error = "Could not get peer certificate: "+std::string(get_error()); + void OnModuleRehash(User* user, const std::string ¶m) CXX11_OVERRIDE + { + if (param != "ssl") return; - } - - certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK); - if (SelfSigned) + try { - certinfo->unknownsigner = false; - certinfo->trusted = true; + ReadProfiles(); } - else + catch (ModuleException& ex) { - certinfo->unknownsigner = true; - certinfo->trusted = false; + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason() + " Not applying settings."); } + } - certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0); - certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0); + void OnUserConnect(LocalUser* user) CXX11_OVERRIDE + { + IOHook* hook = user->eh.GetIOHook(); + if (hook && hook->prov->creator == this) + static_cast(hook)->TellCiphersAndFingerprint(user); + } - if (!X509_digest(cert, digest, md, &n)) - { - certinfo->error = "Out of memory generating fingerprint"; - } - else + void OnCleanup(int target_type, void* item) CXX11_OVERRIDE + { + if (target_type == TYPE_USER) { - certinfo->fingerprint = irc::hex(md, n); - } + LocalUser* user = IS_LOCAL((User*)item); - 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"; + 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"); + } } + } - X509_free(cert); + Version GetVersion() CXX11_OVERRIDE + { + return Version("Provides SSL support for clients", VF_VENDOR); } }; -static int error_callback(const char *str, size_t len, void *u) -{ - ServerInstance->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)