-/* +------------------------------------+
- * | 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) 2020 Matt Schatz <genius3000@g3k.solutions>
+ * Copyright (C) 2019 linuxdaemon <linuxdaemon.irc@gmail.com>
+ * Copyright (C) 2017 Wade Cline <wadecline@hotmail.com>
+ * Copyright (C) 2014, 2016 Adam <Adam@anope.org>
+ * Copyright (C) 2014 Julien Vehent <julien@linuxwall.info>
+ * Copyright (C) 2013-2014, 2016-2020 Sadie Powell <sadie@witchery.services>
+ * Copyright (C) 2012-2017 Attila Molnar <attilamolnar@hush.com>
+ * Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ * Copyright (C) 2012 ChrisTX <xpipe@hotmail.de>
+ * Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
+ * Copyright (C) 2007-2008, 2010 Craig Edwards <brain@inspircd.org>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
*
- * 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 <http://www.gnu.org/licenses/>.
*/
+/// $CompilerFlags: find_compiler_flags("openssl")
+/// $LinkerFlags: find_linker_flags("openssl" "-lssl -lcrypto")
+
+/// $PackageInfo: require_system("arch") openssl pkgconf
+/// $PackageInfo: require_system("centos") openssl-devel pkgconfig
+/// $PackageInfo: require_system("darwin") openssl pkg-config
+/// $PackageInfo: require_system("debian") libssl-dev openssl pkg-config
+/// $PackageInfo: require_system("ubuntu") libssl-dev openssl pkg-config
+
+
#include "inspircd.h"
+#include "iohook.h"
+#include "modules/ssl.h"
+
+#ifdef __GNUC__
+# pragma GCC diagnostic push
+#endif
+
+// Ignore OpenSSL deprecation warnings on OS X Lion and newer.
+#if defined __APPLE__
+# pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
+// LibreSSL lies about the version of OpenSSL it is compatible with and is a general pain
+// to support. Support for it was removed in the master branch at the same time that
+// support for OpenSSL pre-1.1 was.
+#if defined __GNUC__ && defined LIBRESSL_VERSION_NUMBER
+# warning LibreSSL support will be discontinued in the future. Consider using the ssl_gnutls or ssl_mbedtls modules instead.
+#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>
-#include "transport.h"
+#include <openssl/dh.h>
+
+#ifdef __GNUC__
+# pragma GCC diagnostic pop
+#endif
-#ifdef WINDOWS
-#pragma comment(lib, "libeay32MTd")
-#pragma comment(lib, "ssleay32MTd")
-#undef MAX_DESCRIPTORS
-#define MAX_DESCRIPTORS 10000
+#ifdef _WIN32
+# pragma comment(lib, "ssleay32.lib")
+# pragma comment(lib, "libeay32.lib")
#endif
-/* $ModDesc: Provides SSL support for clients */
+// Compatibility layer to allow OpenSSL 1.0 to use the 1.1 API.
+#if ((defined LIBRESSL_VERSION_NUMBER) || (OPENSSL_VERSION_NUMBER < 0x10100000L))
-/* $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") */
+// BIO is opaque in OpenSSL 1.1 but the access API does not exist in 1.0.
+# define BIO_get_data(BIO) BIO->ptr
+# define BIO_set_data(BIO, VALUE) BIO->ptr = VALUE;
+# define BIO_set_init(BIO, VALUE) BIO->init = VALUE;
-/* $ModDep: transport.h */
-/* $NoPedantic */
-/* $CopyInstall: conf/key.pem $(CONPATH) */
-/* $CopyInstall: conf/cert.pem $(CONPATH) */
+// These functions have been renamed in OpenSSL 1.1.
+# define OpenSSL_version SSLeay_version
+# define X509_getm_notAfter X509_get_notAfter
+# define X509_getm_notBefore X509_get_notBefore
+# define OPENSSL_init_ssl(OPTIONS, SETTINGS) \
+ SSL_library_init(); \
+ SSL_load_error_strings();
+// These macros have been renamed in OpenSSL 1.1.
+# define OPENSSL_VERSION SSLEAY_VERSION
+
+#else
+# define INSPIRCD_OPENSSL_OPAQUE_BIO
+#endif
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
-enum issl_io_status { ISSL_WRITE, ISSL_READ };
static bool SelfSigned = false;
+static int exdataindex;
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);
+static void StaticSSLInfoCallback(const SSL* ssl, int where, int rc);
-/** Represents an SSL user's extra data
- */
-class issl_session : public classbase
+namespace OpenSSL
{
-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()
+ class Exception : public ModuleException
{
- 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);
+ public:
+ Exception(const std::string& reason)
+ : ModuleException(reason) { }
+ };
- SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
+ class DHParams
+ {
+ DH* dh;
- return 1;
-}
+ 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);
-class ModuleSSLOpenSSL : public Module
-{
- std::set<ListenSocketBase*> listenports;
+ dh = PEM_read_bio_DHparams(dhpfile, NULL, NULL, NULL);
+ BIO_free(dhpfile);
- int inbufsize;
- issl_session* sessions;
+ if (!dh)
+ throw Exception("Couldn't read DH params from file " + filename);
+ }
- SSL_CTX* ctx;
- SSL_CTX* clictx;
+ ~DHParams()
+ {
+ DH_free(dh);
+ }
- char* dummy;
- char cipher[MAXBUF];
+ DH* get()
+ {
+ return dh;
+ }
+ };
- std::string keyfile;
- std::string certfile;
- std::string cafile;
- // std::string crlfile;
- std::string dhfile;
- std::string sslports;
+ class Context
+ {
+ SSL_CTX* const ctx;
+ long ctx_options;
- public:
+ 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_SSLv3 | 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
- InspIRCd* PublicInstance;
+ ctx_options = SSL_CTX_set_options(ctx, opts);
- ModuleSSLOpenSSL(InspIRCd* Me)
- : Module(Me), PublicInstance(Me)
- {
- ServerInstance->Modules->PublishInterface("BufferedSocketHook", this);
+ 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_NONE, NULL);
+ SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
+ SSL_CTX_set_info_callback(ctx, StaticSSLInfoCallback);
+ }
- sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
+ ~Context()
+ {
+ SSL_CTX_free(ctx);
+ }
- // Not rehashable...because I cba to reduce all the sizes of existing buffers.
- inbufsize = ServerInstance->Config->NetBufferSize;
+ bool SetDH(DHParams& dh)
+ {
+ ERR_clear_error();
+ return (SSL_CTX_set_tmp_dh(ctx, dh.get()) >= 0);
+ }
- /* Global SSL library initialization*/
- SSL_library_init();
- SSL_load_error_strings();
+#ifndef OPENSSL_NO_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
- /* 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_OnRehash, I_OnModuleRehash, I_OnPostConnect,
- I_OnHookIO };
- ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
- }
+ bool SetCiphers(const std::string& ciphers)
+ {
+ ERR_clear_error();
+ return SSL_CTX_set_cipher_list(ctx, ciphers.c_str());
+ }
- virtual void OnHookIO(EventHandler* user, ListenSocketBase* lsb)
- {
- if (!user->GetIOHook() && listenports.find(lsb) != listenports.end())
+ bool SetCerts(const std::string& filename)
{
- /* Hook the user with our module */
- user->AddIOHook(this);
+ ERR_clear_error();
+ return SSL_CTX_use_certificate_chain_file(ctx, filename.c_str());
}
- }
- virtual void OnRehash(User* user)
- {
- ConfigReader Conf(ServerInstance);
+ bool SetPrivateKey(const std::string& filename)
+ {
+ ERR_clear_error();
+ return SSL_CTX_use_PrivateKey_file(ctx, filename.c_str(), SSL_FILETYPE_PEM);
+ }
- listenports.clear();
- sslports.clear();
+ bool SetCA(const std::string& filename)
+ {
+ ERR_clear_error();
+ return SSL_CTX_load_verify_locations(ctx, filename.c_str(), 0);
+ }
- for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+ void SetCRL(const std::string& crlfile, const std::string& crlpath, const std::string& crlmode)
{
- ListenSocketBase* port = ServerInstance->ports[i];
- std::string desc = port->GetDescription();
- if (desc != "openssl")
- continue;
+ if (crlfile.empty() && crlpath.empty())
+ return;
+
+ /* Set CRL mode */
+ unsigned long crlflags = X509_V_FLAG_CRL_CHECK;
+ if (stdalgo::string::equalsci(crlmode, "chain"))
+ {
+ crlflags |= X509_V_FLAG_CRL_CHECK_ALL;
+ }
+ else if (!stdalgo::string::equalsci(crlmode, "leaf"))
+ {
+ throw ModuleException("Unknown mode '" + crlmode + "'; expected either 'chain' (default) or 'leaf'");
+ }
- listenports.insert(port);
- std::string portid = port->GetBindDesc();
+ /* Load CRL files */
+ X509_STORE* store = SSL_CTX_get_cert_store(ctx);
+ if (!store)
+ {
+ throw ModuleException("Unable to get X509_STORE from TLS (SSL) context; this should never happen");
+ }
+ ERR_clear_error();
+ if (!X509_STORE_load_locations(store,
+ crlfile.empty() ? NULL : crlfile.c_str(),
+ crlpath.empty() ? NULL : crlpath.c_str()))
+ {
+ int err = ERR_get_error();
+ throw ModuleException("Unable to load CRL file '" + crlfile + "' or CRL path '" + crlpath + "': '" + (err ? ERR_error_string(err, NULL) : "unknown") + "'");
+ }
- ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
- if (port->GetIP() != "127.0.0.1")
- sslports.append(portid).append(";");
+ /* Set CRL mode */
+ if (X509_STORE_set_flags(store, crlflags) != 1)
+ {
+ throw ModuleException("Unable to set X509 CRL flags");
+ }
}
- if (!sslports.empty())
- sslports.erase(sslports.end() - 1);
- }
- virtual void OnModuleRehash(User* user, const std::string ¶m)
- {
- if (param != "ssl")
- return;
-
- OnRehash(user);
+ long GetDefaultContextOptions() const
+ {
+ return ctx_options;
+ }
- ConfigReader Conf(ServerInstance);
+ long SetRawContextOptions(long setoptions, long clearoptions)
+ {
+ // Clear everything
+ SSL_CTX_clear_options(ctx, SSL_CTX_get_options(ctx));
- std::string confdir(ServerInstance->ConfigFileName);
- // +1 so we the path ends with a /
- confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
+ // 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);
+ }
- cafile = Conf.ReadValue("openssl", "cafile", 0);
- certfile = Conf.ReadValue("openssl", "certfile", 0);
- keyfile = Conf.ReadValue("openssl", "keyfile", 0);
- dhfile = Conf.ReadValue("openssl", "dhfile", 0);
+ void SetVerifyCert()
+ {
+ SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
+ }
- // Set all the default values needed.
- if (cafile.empty())
- cafile = "ca.pem";
+ SSL* CreateServerSession()
+ {
+ SSL* sess = SSL_new(ctx);
+ SSL_set_accept_state(sess); // Act as server
+ return sess;
+ }
- if (certfile.empty())
- certfile = "cert.pem";
+ SSL* CreateClientSession()
+ {
+ SSL* sess = SSL_new(ctx);
+ SSL_set_connect_state(sess); // Act as client
+ return sess;
+ }
+ };
- if (keyfile.empty())
- keyfile = "key.pem";
+ class Profile
+ {
+ /** Name of this profile
+ */
+ const std::string name;
- if (dhfile.empty())
- dhfile = "dhparams.pem";
+ /** DH parameters in use
+ */
+ DHParams dh;
- // Prepend relative paths with the path to the config directory.
- if ((cafile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(cafile)))
- cafile = confdir + cafile;
+ /** OpenSSL makes us have two contexts, one for servers and one for clients
+ */
+ Context ctx;
+ Context clictx;
- if ((certfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(certfile)))
- certfile = confdir + certfile;
+ /** Digest to use when generating fingerprints
+ */
+ const EVP_MD* digest;
- if ((keyfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(keyfile)))
- keyfile = confdir + keyfile;
+ /** Last error, set by error_callback()
+ */
+ std::string lasterr;
- if ((dhfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(dhfile)))
- dhfile = confdir + dhfile;
+ /** True if renegotiations are allowed, false if not
+ */
+ const bool allowrenego;
- /* Load our keys and certificates
- * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
+ /** Rough max size of records to send
*/
- 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);
- }
+ const unsigned int outrecsize;
- 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<Profile*>(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)))
+ /** 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)
{
- 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);
- }
+ long setoptions = tag->getInt(ctxname + "setoptions", 0);
+ long clearoptions = tag->getInt(ctxname + "clearoptions", 0);
+
+#ifdef SSL_OP_NO_COMPRESSION
+ // Disable compression by default
+ if (!tag->getBool("compression", false))
+ setoptions |= SSL_OP_NO_COMPRESSION;
+#endif
- FILE* dhpfile = fopen(dhfile.c_str(), "r");
- DH* ret;
+ // Disable TLSv1.0 by default.
+ if (!tag->getBool("tlsv1", false))
+ setoptions |= SSL_OP_NO_TLSv1;
- 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));
+#ifdef SSL_OP_NO_TLSv1_1
+ // Enable TLSv1.1 by default.
+ if (!tag->getBool("tlsv11", true))
+ setoptions |= SSL_OP_NO_TLSv1_1;
+#endif
+
+#ifdef SSL_OP_NO_TLSv1_2
+ // Enable TLSv1.2 by default.
+ if (!tag->getBool("tlsv12", true))
+ setoptions |= SSL_OP_NO_TLSv1_2;
+#endif
+
+ 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);
}
- else
+
+ public:
+ Profile(const std::string& profilename, ConfigTag* tag)
+ : name(profilename)
+ , dh(ServerInstance->Config->Paths.PrependConfig(tag->getString("dhfile", "dhparams.pem", 1)))
+ , ctx(SSL_CTX_new(SSLv23_server_method()))
+ , clictx(SSL_CTX_new(SSLv23_client_method()))
+ , allowrenego(tag->getBool("renegotiation")) // Disallow by default
+ , outrecsize(tag->getUInt("outrecsize", 2048, 512, 16384))
{
- 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))
+ if ((!ctx.SetDH(dh)) || (!clictx.SetDH(dh)))
+ throw Exception("Couldn't set DH parameters");
+
+ const std::string hash = tag->getString("hash", "md5", 1);
+ 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())
{
- 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);
+ if ((!ctx.SetCiphers(ciphers)) || (!clictx.SetCiphers(ciphers)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't set cipher list to \"" + ciphers + "\" " + lasterr);
+ }
}
- }
- fclose(dhpfile);
- }
-
- virtual void On005Numeric(std::string &output)
- {
- if (!sslports.empty())
- output.append(" SSL=" + sslports);
- }
+#ifndef OPENSSL_NO_ECDH
+ const std::string curvename = tag->getString("ecdhcurve", "prime256v1", 1);
+ if (!curvename.empty())
+ ctx.SetECDH(curvename);
+#endif
- virtual ~ModuleSSLOpenSSL()
- {
- SSL_CTX_free(ctx);
- SSL_CTX_free(clictx);
- ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this);
- delete[] sessions;
- }
+ SetContextOptions("server", tag, ctx);
+ SetContextOptions("client", tag, clictx);
- virtual void OnCleanup(int target_type, void* item)
- {
- if (target_type == TYPE_USER)
- {
- User* user = (User*)item;
+ /* 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", 1));
+ if ((!ctx.SetCerts(filename)) || (!clictx.SetCerts(filename)))
+ {
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't read certificate file: " + lasterr);
+ }
- if (user->GetIOHook() == this)
+ filename = ServerInstance->Config->Paths.PrependConfig(tag->getString("keyfile", "key.pem", 1));
+ if ((!ctx.SetPrivateKey(filename)) || (!clictx.SetPrivateKey(filename)))
{
- // 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();
+ ERR_print_errors_cb(error_callback, this);
+ throw Exception("Can't read key file: " + lasterr);
}
- if (user->GetExt("ssl_cert", dummy))
+
+ // Load the CAs we trust
+ filename = ServerInstance->Config->Paths.PrependConfig(tag->getString("cafile", "ca.pem", 1));
+ if ((!ctx.SetCA(filename)) || (!clictx.SetCA(filename)))
{
- ssl_cert* tofree;
- user->GetExt("ssl_cert", tofree);
- delete tofree;
- user->Shrink("ssl_cert");
+ 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());
}
- }
- }
- virtual Version GetVersion()
- {
- return Version("$Id$", VF_VENDOR, API_VERSION);
- }
+ // Load the CRLs.
+ const std::string crlfile = tag->getString("crlfile");
+ const std::string crlpath = tag->getString("crlpath");
+ const std::string crlmode = tag->getString("crlmode", "chain", 1);
+ ctx.SetCRL(crlfile, crlpath, crlmode);
+ clictx.SetVerifyCert();
+ if (tag->getBool("requestclientcert", true))
+ ctx.SetVerifyCert();
+ }
+
+ 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; }
+ };
- virtual const char* OnRequest(Request* request)
+ namespace BIOMethod
{
- ISHRequest* ISR = (ISHRequest*)request;
- if (strcmp("IS_NAME", request->GetId()) == 0)
+ static int create(BIO* bio)
{
- return "openssl";
+ BIO_set_init(bio, 1);
+ return 1;
}
- 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)
+ static int destroy(BIO* bio)
{
- return ISR->Sock->DelIOHook() ? "OK" : NULL;
+ // 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;
}
- 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)
+ static long ctrl(BIO* bio, int cmd, long num, void* ptr)
{
- issl_session* session = &sessions[ISR->Sock->GetFd()];
- if (session->sess)
- {
- VerifyCertificate(session, (BufferedSocket*)ISR->Sock);
- return "OK";
- }
+ if (cmd == BIO_CTRL_FLUSH)
+ return 1;
+ return 0;
}
- else if (strcmp("GET_FP", request->GetId()) == 0)
+
+ static int read(BIO* bio, char* buf, int len);
+ static int write(BIO* bio, const char* buf, int len);
+
+#ifdef INSPIRCD_OPENSSL_OPAQUE_BIO
+ static BIO_METHOD* alloc()
{
- 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();
- }
- }
+ BIO_METHOD* meth = BIO_meth_new(100 | BIO_TYPE_SOURCE_SINK, "inspircd");
+ BIO_meth_set_write(meth, OpenSSL::BIOMethod::write);
+ BIO_meth_set_read(meth, OpenSSL::BIOMethod::read);
+ BIO_meth_set_ctrl(meth, OpenSSL::BIOMethod::ctrl);
+ BIO_meth_set_create(meth, OpenSSL::BIOMethod::create);
+ BIO_meth_set_destroy(meth, OpenSSL::BIOMethod::destroy);
+ return meth;
}
- return NULL;
+#endif
}
+}
+// BIO_METHOD is opaque in OpenSSL 1.1 so we can't do this.
+// See OpenSSL::BIOMethod::alloc for the new method.
+#ifndef INSPIRCD_OPENSSL_OPAQUE_BIO
+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
+};
+#else
+static BIO_METHOD* biomethods;
+#endif
- 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;
+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);
- if (session->sess == NULL)
- return;
+ SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
- 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;
- }
+ return 1;
+}
- Handshake(session);
- }
+class OpenSSLIOHook : public SSLIOHook
+{
+ private:
+ SSL* sess;
+ issl_status status;
+ bool data_to_write;
- virtual void OnRawSocketConnect(int fd)
+ // Returns 1 if handshake succeeded, 0 if it is still in progress, -1 if it failed
+ int Handshake(StreamSocket* user)
{
- /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
- if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
- return;
+ ERR_clear_error();
+ int ret = SSL_do_handshake(sess);
+ if (ret < 0)
+ {
+ int err = SSL_get_error(sess, ret);
- issl_session* session = &sessions[fd];
+ 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();
- session->fd = fd;
- session->inbuf = new char[inbufsize];
- session->inbufoffset = 0;
- session->sess = SSL_new(clictx);
- session->status = ISSL_NONE;
- session->outbound = true;
+ status = ISSL_OPEN;
- if (session->sess == NULL)
- return;
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
- if (SSL_set_fd(session->sess, fd) == 0)
+ return 1;
+ }
+ else if (ret == 0)
{
- ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
- return;
+ CloseSession();
}
-
- Handshake(session);
+ return -1;
}
- virtual void OnRawSocketClose(int fd)
+ void CloseSession()
{
- /* 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)))
+ if (sess)
{
- ssl_cert* tofree;
- user->GetExt("ssl_cert", tofree);
- delete tofree;
- user->Shrink("ssl_cert");
+ SSL_shutdown(sess);
+ SSL_free(sess);
}
+ sess = NULL;
+ certificate = NULL;
+ status = ISSL_NONE;
}
- virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
+ void VerifyCertificate()
{
- /* 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;
+ X509* cert;
+ ssl_cert* certinfo = new ssl_cert;
+ this->certificate = certinfo;
+ unsigned int n;
+ unsigned char md[EVP_MAX_MD_SIZE];
- issl_session* session = &sessions[fd];
+ cert = SSL_get_peer_certificate(sess);
- if (!session->sess)
+ if (!cert)
{
- readresult = 0;
- CloseSession(session);
- return 1;
+ certinfo->error = "Could not get peer certificate: "+std::string(get_error());
+ return;
}
- if (session->status == ISSL_HANDSHAKING)
+ certinfo->invalid = (SSL_get_verify_result(sess) != X509_V_OK);
+
+ if (!SelfSigned)
{
- 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;
- }
+ certinfo->unknownsigner = false;
+ certinfo->trusted = true;
+ }
+ else
+ {
+ certinfo->unknownsigner = true;
+ certinfo->trusted = false;
}
- // If we resumed the handshake then session->status will be ISSL_OPEN
+ 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();
- if (session->status == ISSL_OPEN)
- {
- if (session->wstat == ISSL_READ)
- {
- if(DoWrite(session) == 0)
- return 0;
- }
+ 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 (session->rstat == ISSL_READ)
- {
- int ret = DoRead(session);
+ if (!X509_digest(cert, GetProfile().GetDigest(), md, &n))
+ {
+ certinfo->error = "Out of memory generating fingerprint";
+ }
+ else
+ {
+ certinfo->fingerprint = BinToHex(md, n);
+ }
- 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;
- }
+ if ((ASN1_UTCTIME_cmp_time_t(X509_getm_notAfter(cert), ServerInstance->Time()) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_getm_notBefore(cert), ServerInstance->Time()) == 0))
+ {
+ certinfo->error = "Not activated, or expired certificate";
}
- return -1;
+ X509_free(cert);
}
- virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
+ void SSLInfoCallback(int where, int rc)
{
- /* 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)
+ if ((where & SSL_CB_HANDSHAKE_START) && (status == ISSL_OPEN))
{
- CloseSession(session);
- return -1;
+ if (GetProfile().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_get_data(bio));
+ SocketEngine::Shutdown(eh, 2);
}
+ }
+
+ bool CheckRenego(StreamSocket* sock)
+ {
+ if (status != ISSL_NONE)
+ return true;
- session->outbuf.append(buffer, count);
- MakePollWrite(session);
+ ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Session %p killed, attempted to renegotiate", (void*)sess);
+ CloseSession();
+ sock->SetError("Renegotiation is not allowed");
+ return false;
+ }
- if (session->status == ISSL_HANDSHAKING)
+ // 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.
- 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;
- }
- }
+ // The handshake isn't finished, try to finish it
+ return Handshake(sock);
}
- if (session->status == ISSL_OPEN)
- {
- if (session->rstat == ISSL_WRITE)
- {
- DoRead(session);
- }
+ CloseSession();
+ return -1;
+ }
- if (session->wstat == ISSL_WRITE)
- {
- return DoWrite(session);
- }
- }
+ // Calls our private SSLInfoCallback()
+ friend void StaticSSLInfoCallback(const SSL* ssl, int where, int rc);
- return 1;
+ public:
+ OpenSSLIOHook(IOHookProvider* hookprov, StreamSocket* sock, SSL* session)
+ : SSLIOHook(hookprov)
+ , sess(session)
+ , status(ISSL_NONE)
+ , data_to_write(false)
+ {
+ // Create BIO instance and store a pointer to the socket in it which will be used by the read and write functions
+#ifdef INSPIRCD_OPENSSL_OPAQUE_BIO
+ BIO* bio = BIO_new(biomethods);
+#else
+ BIO* bio = BIO_new(&biomethods);
+#endif
+ BIO_set_data(bio, sock);
+ SSL_set_bio(sess, bio, bio);
+
+ SSL_set_ex_data(sess, exdataindex, this);
+ sock->AddIOHook(this);
+ Handshake(sock);
}
- int DoWrite(issl_session* session)
+ void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
{
- if (!session->outbuf.size())
- return -1;
+ CloseSession();
+ }
- int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
+ int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
+ {
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
- if (ret == 0)
- {
- CloseSession(session);
- return 0;
- }
- else if (ret < 0)
+ // If we resumed the handshake then this->status will be ISSL_OPEN
{
- int err = SSL_get_error(session->sess, ret);
+ ERR_clear_error();
+ char* buffer = ServerInstance->GetReadBuffer();
+ size_t bufsiz = ServerInstance->Config->NetBufferSize;
+ int ret = SSL_read(sess, buffer, bufsiz);
- if (err == SSL_ERROR_WANT_WRITE)
- {
- session->wstat = ISSL_WRITE;
+ if (!CheckRenego(user))
return -1;
+
+ if (ret > 0)
+ {
+ recvq.append(buffer, ret);
+ int mask = 0;
+ // Schedule a read if there is still data in the OpenSSL buffer
+ if (SSL_pending(sess) > 0)
+ mask |= FD_ADD_TRIAL_READ;
+ if (data_to_write)
+ mask |= FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE;
+ if (mask != 0)
+ SocketEngine::ChangeEventMask(user, mask);
+ return 1;
}
- else if (err == SSL_ERROR_WANT_READ)
+ else if (ret == 0)
{
- session->wstat = ISSL_READ;
+ // Client closed connection.
+ CloseSession();
+ user->SetError("Connection closed");
return -1;
}
- else
+ else // if (ret < 0)
{
- CloseSession(session);
- return 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;
+ }
}
}
- else
- {
- session->outbuf = session->outbuf.substr(ret);
- return ret;
- }
}
- int DoRead(issl_session* session)
+ int OnStreamSocketWrite(StreamSocket* user, StreamSocket::SendQueue& sendq) CXX11_OVERRIDE
{
- // 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.
+ // Finish handshake if needed
+ int prepret = PrepareIO(user);
+ if (prepret <= 0)
+ return prepret;
- int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
+ data_to_write = true;
- if (ret == 0)
- {
- // Client closed connection.
- CloseSession(session);
- return 0;
- }
- else if (ret < 0)
+ // Session is ready for transferring application data
+ while (!sendq.empty())
{
- int err = SSL_get_error(session->sess, ret);
+ ERR_clear_error();
+ FlattenSendQueue(sendq, GetProfile().GetOutgoingRecordSize());
+ const StreamSocket::SendQueue::Element& buffer = sendq.front();
+ int ret = SSL_write(sess, buffer.data(), buffer.size());
- if (err == SSL_ERROR_WANT_READ)
- {
- session->rstat = ISSL_READ;
+ if (!CheckRenego(user))
return -1;
+
+ if (ret == (int)buffer.length())
+ {
+ // Wrote entire record, continue sending
+ sendq.pop_front();
}
- else if (err == SSL_ERROR_WANT_WRITE)
+ else if (ret > 0)
{
- session->rstat = ISSL_WRITE;
- MakePollWrite(session);
+ sendq.erase_front(ret);
+ SocketEngine::ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else if (ret == 0)
+ {
+ CloseSession();
return -1;
}
- else
+ else // if (ret < 0)
{
- CloseSession(session);
- return 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;
+ }
}
}
- else
- {
- // Read successfully 'ret' bytes into inbuf + inbufoffset
- // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
- // 'buffer' is 'count' long
- session->inbufoffset += ret;
+ data_to_write = false;
+ SocketEngine::ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
+ return 1;
+ }
- return ret;
- }
+ void GetCiphersuite(std::string& out) const CXX11_OVERRIDE
+ {
+ if (!IsHandshakeDone())
+ return;
+ out.append(SSL_get_version(sess)).push_back('-');
+ out.append(SSL_get_cipher(sess));
}
- bool Handshake(issl_session* session)
+ bool GetServerName(std::string& out) const CXX11_OVERRIDE
{
- int ret;
+ const char* name = SSL_get_servername(sess, TLSEXT_NAMETYPE_host_name);
+ if (!name)
+ return false;
- if (session->outbound)
- ret = SSL_connect(session->sess);
- else
- ret = SSL_accept(session->sess);
+ out.append(name);
+ return true;
+ }
- if (ret < 0)
- {
- int err = SSL_get_error(session->sess, ret);
+ bool IsHandshakeDone() const { return (status == ISSL_OPEN); }
+ OpenSSL::Profile& GetProfile();
+};
- 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);
- }
+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);
+}
- 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");
- }
+static int OpenSSL::BIOMethod::write(BIO* bio, const char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
+
+ StreamSocket* sock = static_cast<StreamSocket*>(BIO_get_data(bio));
+ if (sock->GetEventMask() & FD_WRITE_WILL_BLOCK)
+ {
+ // Writes blocked earlier, don't retry syscall
+ BIO_set_retry_write(bio);
+ return -1;
+ }
- session->status = ISSL_OPEN;
+ 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);
+ }
- MakePollWrite(session);
+ return ret;
+}
- return true;
- }
- else if (ret == 0)
- {
- CloseSession(session);
- return true;
- }
+static int OpenSSL::BIOMethod::read(BIO* bio, char* buffer, int size)
+{
+ BIO_clear_retry_flags(bio);
- return true;
+ StreamSocket* sock = static_cast<StreamSocket*>(BIO_get_data(bio));
+ if (sock->GetEventMask() & FD_READ_WILL_BLOCK)
+ {
+ // Reads blocked earlier, don't retry syscall
+ BIO_set_retry_read(bio);
+ return -1;
}
- virtual void OnPostConnect(User* user)
+ int ret = SocketEngine::Recv(sock, buffer, size, 0);
+ if ((ret < size) && ((ret > 0) || (SocketEngine::IgnoreError())))
{
- // 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));
+ // Blocked, set retry flag for OpenSSL
+ SocketEngine::ChangeEventMask(sock, FD_READ_WILL_BLOCK);
+ BIO_set_retry_read(bio);
+ }
- ServerInstance->PI->SendMetaData(user, "ssl", "ON");
- if (certdata)
- ServerInstance->PI->SendMetaData(user, "ssl_cert", certdata->GetMetaLine().c_str());
- }
+ return ret;
+}
+
+class OpenSSLIOHookProvider : public IOHookProvider
+{
+ OpenSSL::Profile profile;
+
+ public:
+ OpenSSLIOHookProvider(Module* mod, const std::string& profilename, ConfigTag* tag)
+ : IOHookProvider(mod, "ssl/" + profilename, IOHookProvider::IOH_SSL)
+ , profile(profilename, tag)
+ {
+ ServerInstance->Modules->AddService(*this);
}
- void MakePollWrite(issl_session* session)
+ ~OpenSSLIOHookProvider()
{
- //OnRawSocketWrite(session->fd, NULL, 0);
- EventHandler* eh = ServerInstance->SE->GetRef(session->fd);
- if (eh)
- {
- ServerInstance->SE->WantWrite(eh);
- }
+ ServerInstance->Modules->DelService(*this);
}
- virtual void OnBufferFlushed(User* user)
+ void OnAccept(StreamSocket* sock, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
{
- if (user->GetIOHook() == this)
- {
- issl_session* session = &sessions[user->GetFd()];
- if (session && session->outbuf.size())
- OnRawSocketWrite(user->GetFd(), NULL, 0);
- }
+ new OpenSSLIOHook(this, sock, profile.CreateServerSession());
+ }
+
+ void OnConnect(StreamSocket* sock) CXX11_OVERRIDE
+ {
+ new OpenSSLIOHook(this, sock, profile.CreateClientSession());
}
- void CloseSession(issl_session* session)
+ OpenSSL::Profile& GetProfile() { return profile; }
+};
+
+OpenSSL::Profile& OpenSSLIOHook::GetProfile()
+{
+ IOHookProvider* hookprov = prov;
+ return static_cast<OpenSSLIOHookProvider*>(hookprov)->GetProfile();
+}
+
+class ModuleSSLOpenSSL : public Module
+{
+ typedef std::vector<reference<OpenSSLIOHookProvider> > ProfileList;
+
+ ProfileList profiles;
+
+ void ReadProfiles()
{
- if (session->sess)
+ ProfileList newprofiles;
+ ConfigTagList tags = ServerInstance->Config->ConfTags("sslprofile");
+ if (tags.first == tags.second)
{
- SSL_shutdown(session->sess);
- SSL_free(session->sess);
+ // 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 deprecated <openssl> tag");
+
+ try
+ {
+ newprofiles.push_back(new OpenSSLIOHookProvider(this, defname, tag));
+ }
+ catch (OpenSSL::Exception& ex)
+ {
+ throw ModuleException("Error while initializing the default TLS (SSL) profile - " + ex.GetReason());
+ }
+ }
+ else
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "You have defined an <sslprofile> tag; you should use this in place of \"openssl\" when configuring TLS (SSL) connections in <bind:ssl> or <link:ssl>");
+ for (ConfigIter i = tags.first; i != tags.second; ++i)
+ {
+ ConfigTag* tag = i->second;
+ if (!stdalgo::string::equalsci(tag->getString("provider"), "openssl"))
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Ignoring non-OpenSSL <sslprofile> tag at " + tag->getTagLocation());
+ 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<OpenSSLIOHookProvider> prov;
+ try
+ {
+ prov = new OpenSSLIOHookProvider(this, name, tag);
+ }
+ catch (CoreException& ex)
+ {
+ throw ModuleException("Error while initializing TLS (SSL) profile \"" + name + "\" at " + tag->getTagLocation() + " - " + ex.GetReason());
+ }
+
+ newprofiles.push_back(prov);
+ }
}
- if (session->inbuf)
+ for (ProfileList::iterator i = profiles.begin(); i != profiles.end(); ++i)
{
- delete[] session->inbuf;
+ OpenSSLIOHookProvider& prov = **i;
+ ServerInstance->Modules.DelService(prov);
}
- session->outbuf.clear();
- session->inbuf = NULL;
- session->sess = NULL;
- session->status = ISSL_NONE;
- errno = EIO;
+ profiles.swap(newprofiles);
}
- ssl_cert* VerifyCertificate(issl_session* session, Extensible* user)
+ public:
+ ModuleSSLOpenSSL()
{
- if (!session->sess || !user)
- return NULL;
+ // Initialize OpenSSL
+ OPENSSL_init_ssl(0, NULL);
+#ifdef INSPIRCD_OPENSSL_OPAQUE_BIO
+ biomethods = OpenSSL::BIOMethod::alloc();
+ }
- X509* cert;
- ssl_cert* certinfo = new ssl_cert;
- unsigned int n;
- unsigned char md[EVP_MAX_MD_SIZE];
- const EVP_MD *digest = EVP_md5();
+ ~ModuleSSLOpenSSL()
+ {
+ BIO_meth_free(biomethods);
+#endif
+ }
- user->Extend("ssl_cert",certinfo);
+ void init() CXX11_OVERRIDE
+ {
+ ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "OpenSSL lib version \"%s\" module was compiled for \"" OPENSSL_VERSION_TEXT "\"", OpenSSL_version(OPENSSL_VERSION));
- cert = SSL_get_peer_certificate((SSL*)session->sess);
+ // 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");
- if (!cert)
- {
- certinfo->error = "Could not get peer certificate: "+std::string(get_error());
- return certinfo;
- }
+ ReadProfiles();
+ }
- certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
+ void OnModuleRehash(User* user, const std::string ¶m) CXX11_OVERRIDE
+ {
+ if (!irc::equals(param, "tls") && !irc::equals(param, "ssl"))
+ return;
- if (SelfSigned)
+ try
{
- certinfo->unknownsigner = false;
- certinfo->trusted = true;
+ ReadProfiles();
+ ServerInstance->SNO->WriteToSnoMask('a', "TLS (SSL) module OpenSSL rehashed.");
}
- 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);
-
- if (!X509_digest(cert, digest, md, &n))
- {
- certinfo->error = "Out of memory generating fingerprint";
- }
- else
+ void OnCleanup(ExtensionItem::ExtensibleType type, Extensible* item) CXX11_OVERRIDE
+ {
+ if (type == ExtensionItem::EXT_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.GetModHook(this)))
+ {
+ // User is using TLS (SSL), they're a local user, and they're using one of *our* TLS (SSL) ports.
+ // Potentially there could be multiple TLS (SSL) modules loaded at once on different ports.
+ ServerInstance->Users->QuitUser(user, "OpenSSL module unloading");
+ }
}
-
- X509_free(cert);
- return certinfo;
}
- void Prioritize()
+ ModResult OnCheckReady(LocalUser* user) CXX11_OVERRIDE
{
- Module* server = ServerInstance->Modules->Find("m_spanningtree.so");
- ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIORITY_AFTER, &server);
+ const OpenSSLIOHook* const iohook = static_cast<OpenSSLIOHook*>(user->eh.GetModHook(this));
+ if ((iohook) && (!iohook->IsHandshakeDone()))
+ return MOD_RES_DENY;
+ return MOD_RES_PASSTHRU;
}
+ Version GetVersion() CXX11_OVERRIDE
+ {
+ return Version("Allows TLS (SSL) encrypted connections using the OpenSSL library.", VF_VENDOR);
+ }
};
-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)