-/* +------------------------------------+
- * | 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 <danieldg@inspircd.org>
+ * Copyright (C) 2008 John Brooks <john.brooks@dereferenced.net>
+ * Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ * Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
*
- * 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/>.
*/
+
#include "inspircd.h"
+#ifndef _WIN32
+#include <gcrypt.h>
+#endif
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
-#include "transport.h"
+#include "ssl.h"
#include "m_cap.h"
-#ifdef WINDOWS
-#pragma comment(lib, "libgnutls-13.lib")
+#ifdef _WIN32
+# pragma comment(lib, "libgnutls-28.lib")
#endif
/* $ModDesc: Provides SSL support for clients */
-/* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") */
-/* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") */
-/* $ModDep: transport.h */
-/* $CopyInstall: conf/key.pem $(CONPATH) */
-/* $CopyInstall: conf/cert.pem $(CONPATH) */
+/* $CompileFlags: pkgconfincludes("gnutls","/gnutls/gnutls.h","") exec("libgcrypt-config --cflags") */
+/* $LinkerFlags: rpath("pkg-config --libs gnutls") pkgconflibs("gnutls","/libgnutls.so","-lgnutls") exec("libgcrypt-config --libs") */
+/* $NoPedantic */
+
+#ifndef GNUTLS_VERSION_MAJOR
+#define GNUTLS_VERSION_MAJOR LIBGNUTLS_VERSION_MAJOR
+#define GNUTLS_VERSION_MINOR LIBGNUTLS_VERSION_MINOR
+#define GNUTLS_VERSION_PATCH LIBGNUTLS_VERSION_PATCH
+#endif
+
+// These don't exist in older GnuTLS versions
+#if ((GNUTLS_VERSION_MAJOR > 2) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR > 1) || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR == 1 && GNUTLS_VERSION_PATCH >= 7))
+#define GNUTLS_NEW_PRIO_API
+#endif
+
+#if(GNUTLS_VERSION_MAJOR < 2)
+typedef gnutls_certificate_credentials_t gnutls_certificate_credentials;
+typedef gnutls_dh_params_t gnutls_dh_params;
+#endif
+
+#if (defined(_WIN32) && (GNUTLS_VERSION_MAJOR > 2 || (GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR >= 12)))
+# define GNUTLS_HAS_RND
+# include <gnutls/crypto.h>
+#else
+# include <gcrypt.h>
+#endif
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
-/** Represents an SSL user's extra data
- */
-class issl_session : public classbase
+static std::vector<gnutls_x509_crt_t> x509_certs;
+static gnutls_x509_privkey_t x509_key;
+#if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
+static int cert_callback (gnutls_session_t session, const gnutls_datum_t * req_ca_rdn, int nreqs,
+ const gnutls_pk_algorithm_t * sign_algos, int sign_algos_length, gnutls_retr_st * st) {
+
+ st->type = GNUTLS_CRT_X509;
+#else
+static int cert_callback (gnutls_session_t session, const gnutls_datum_t * req_ca_rdn, int nreqs,
+ const gnutls_pk_algorithm_t * sign_algos, int sign_algos_length, gnutls_retr2_st * st) {
+ st->cert_type = GNUTLS_CRT_X509;
+ st->key_type = GNUTLS_PRIVKEY_X509;
+#endif
+ st->ncerts = x509_certs.size();
+ st->cert.x509 = &x509_certs[0];
+ st->key.x509 = x509_key;
+ st->deinit_all = 0;
+
+ return 0;
+}
+
+class RandGen : public HandlerBase2<void, char*, size_t>
{
-public:
- issl_session()
+ public:
+ RandGen() {}
+ void Call(char* buffer, size_t len)
{
- sess = NULL;
+#ifdef GNUTLS_HAS_RND
+ gnutls_rnd(GNUTLS_RND_RANDOM, buffer, len);
+#else
+ gcry_randomize(buffer, len, GCRY_STRONG_RANDOM);
+#endif
}
+};
+/** Represents an SSL user's extra data
+ */
+class issl_session
+{
+public:
+ StreamSocket* socket;
gnutls_session_t sess;
issl_status status;
- std::string outbuf;
+ reference<ssl_cert> cert;
+
+ issl_session() : socket(NULL), sess(NULL) {}
};
-class CommandStartTLS : public Command
+class CommandStartTLS : public SplitCommand
{
- Module* Caller;
public:
- CommandStartTLS (InspIRCd* Instance, Module* mod) : Command(Instance,"STARTTLS", 0, 0, true), Caller(mod)
+ bool enabled;
+ CommandStartTLS (Module* mod) : SplitCommand(mod, "STARTTLS")
{
- this->source = "m_ssl_gnutls.so";
+ enabled = true;
+ works_before_reg = true;
}
- CmdResult Handle (const std::vector<std::string> ¶meters, User *user)
+ CmdResult HandleLocal(const std::vector<std::string> ¶meters, LocalUser *user)
{
- /* changed from == REG_ALL to catch clients sending STARTTLS
- * after NICK and USER but before OnUserConnect completes and
- * give a proper error message (see bug #645) - dz
- */
- if (user->registered != REG_NONE)
+ if (!enabled)
{
- user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration has started", user->nick.c_str());
+ user->WriteNumeric(691, "%s :STARTTLS is not enabled", user->nick.c_str());
+ return CMD_FAILURE;
+ }
+
+ if (user->registered == REG_ALL)
+ {
+ user->WriteNumeric(691, "%s :STARTTLS is not permitted after client registration is complete", user->nick.c_str());
}
else
{
- if (!user->GetIOHook())
+ if (!user->eh.GetIOHook())
{
user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
- user->AddIOHook(Caller);
- Caller->OnRawSocketAccept(user->GetFd(), NULL, NULL);
+ /* We need to flush the write buffer prior to adding the IOHook,
+ * otherwise we'll be sending this line inside the SSL session - which
+ * won't start its handshake until the client gets this line. Currently,
+ * we assume the write will not block here; this is usually safe, as
+ * STARTTLS is sent very early on in the registration phase, where the
+ * user hasn't built up much sendq. Handling a blocked write here would
+ * be very annoying.
+ */
+ user->eh.DoWrite();
+ user->eh.AddIOHook(creator);
+ creator->OnStreamSocketAccept(&user->eh, NULL, NULL);
}
else
user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
class ModuleSSLGnuTLS : public Module
{
- std::set<ListenSocketBase*> listenports;
-
issl_session* sessions;
- gnutls_certificate_credentials x509_cred;
- gnutls_dh_params dh_params;
+ gnutls_certificate_credentials_t x509_cred;
+ gnutls_dh_params_t dh_params;
+ gnutls_digest_algorithm_t hash;
+ #ifdef GNUTLS_NEW_PRIO_API
+ gnutls_priority_t priority;
+ #endif
- std::string keyfile;
- std::string certfile;
- std::string cafile;
- std::string crlfile;
std::string sslports;
int dh_bits;
bool cred_alloc;
+ bool dh_alloc;
+ RandGen randhandler;
CommandStartTLS starttls;
+ GenericCap capHandler;
+ ServiceProvider iohook;
+
+ inline static const char* UnknownIfNULL(const char* str)
+ {
+ return str ? str : "UNKNOWN";
+ }
+
+ static ssize_t gnutls_pull_wrapper(gnutls_transport_ptr_t session_wrap, void* buffer, size_t size)
+ {
+ issl_session* session = reinterpret_cast<issl_session*>(session_wrap);
+ if (session->socket->GetEventMask() & FD_READ_WILL_BLOCK)
+ {
+#ifdef _WIN32
+ gnutls_transport_set_errno(session->sess, EAGAIN);
+#else
+ errno = EAGAIN;
+#endif
+ return -1;
+ }
+
+ int rv = ServerInstance->SE->Recv(session->socket, reinterpret_cast<char *>(buffer), size, 0);
+
+#ifdef _WIN32
+ if (rv < 0)
+ {
+ /* Windows doesn't use errno, but gnutls does, so check SocketEngine::IgnoreError()
+ * and then set errno appropriately.
+ * The gnutls library may also have a different errno variable than us, see
+ * gnutls_transport_set_errno(3).
+ */
+ gnutls_transport_set_errno(session->sess, SocketEngine::IgnoreError() ? EAGAIN : errno);
+ }
+#endif
+
+ if (rv < (int)size)
+ ServerInstance->SE->ChangeEventMask(session->socket, FD_READ_WILL_BLOCK);
+ return rv;
+ }
+
+ static ssize_t gnutls_push_wrapper(gnutls_transport_ptr_t session_wrap, const void* buffer, size_t size)
+ {
+ issl_session* session = reinterpret_cast<issl_session*>(session_wrap);
+ if (session->socket->GetEventMask() & FD_WRITE_WILL_BLOCK)
+ {
+#ifdef _WIN32
+ gnutls_transport_set_errno(session->sess, EAGAIN);
+#else
+ errno = EAGAIN;
+#endif
+ return -1;
+ }
+
+ int rv = ServerInstance->SE->Send(session->socket, reinterpret_cast<const char *>(buffer), size, 0);
+
+#ifdef _WIN32
+ if (rv < 0)
+ {
+ /* Windows doesn't use errno, but gnutls does, so check SocketEngine::IgnoreError()
+ * and then set errno appropriately.
+ * The gnutls library may also have a different errno variable than us, see
+ * gnutls_transport_set_errno(3).
+ */
+ gnutls_transport_set_errno(session->sess, SocketEngine::IgnoreError() ? EAGAIN : errno);
+ }
+#endif
+
+ if (rv < (int)size)
+ ServerInstance->SE->ChangeEventMask(session->socket, FD_WRITE_WILL_BLOCK);
+ return rv;
+ }
+
public:
- ModuleSSLGnuTLS(InspIRCd* Me)
- : Module(Me), starttls(Me, this)
+ ModuleSSLGnuTLS()
+ : starttls(this), capHandler(this, "tls"), iohook(this, "ssl/gnutls", SERVICE_IOHOOK)
{
- ServerInstance->Modules->PublishInterface("BufferedSocketHook", this);
+#ifndef GNUTLS_HAS_RND
+ gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
+#endif
sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
gnutls_global_init(); // This must be called once in the program
+ gnutls_x509_privkey_init(&x509_key);
+
+ #ifdef GNUTLS_NEW_PRIO_API
+ // Init this here so it's always initialized, avoids an extra boolean
+ gnutls_priority_init(&priority, "NORMAL", NULL);
+ #endif
cred_alloc = false;
+ dh_alloc = false;
+ }
+
+ void init()
+ {
// Needs the flag as it ignores a plain /rehash
OnModuleRehash(NULL,"ssl");
+ ServerInstance->GenRandom = &randhandler;
+
// Void return, guess we assume success
gnutls_certificate_set_dh_params(x509_cred, dh_params);
- Implementation eventlist[] = { I_On005Numeric, I_OnRawSocketConnect, I_OnRawSocketAccept,
- I_OnRawSocketClose, I_OnRawSocketRead, I_OnRawSocketWrite, I_OnCleanup,
- I_OnBufferFlushed, I_OnRequest, I_OnRehash, I_OnModuleRehash, I_OnPostConnect,
+ Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnUserConnect,
I_OnEvent, I_OnHookIO };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
- ServerInstance->AddCommand(&starttls);
+ ServerInstance->Modules->AddService(iohook);
+ ServerInstance->Modules->AddService(starttls);
}
- virtual void OnRehash(User* user)
+ void OnRehash(User* user)
{
- ConfigReader Conf(ServerInstance);
-
- listenports.clear();
sslports.clear();
- for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+ ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
+ starttls.enabled = Conf->getBool("starttls", true);
+
+ if (Conf->getBool("showports", true))
{
- ListenSocketBase* port = ServerInstance->ports[i];
- std::string desc = port->GetDescription();
- if (desc != "gnutls")
- continue;
+ sslports = Conf->getString("advertisedports");
+ if (!sslports.empty())
+ return;
- listenports.insert(port);
- std::string portid = port->GetBindDesc();
+ for (size_t i = 0; i < ServerInstance->ports.size(); i++)
+ {
+ ListenSocket* port = ServerInstance->ports[i];
+ if (port->bind_tag->getString("ssl") != "gnutls")
+ continue;
- ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
- if (port->GetIP() != "127.0.0.1")
- sslports.append(portid).append(";");
- }
+ const std::string& portid = port->bind_desc;
+ ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %s", portid.c_str());
- if (!sslports.empty())
- sslports.erase(sslports.end() - 1);
+ if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
+ {
+ /*
+ * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
+ * the IP:port in ISUPPORT.
+ *
+ * We used to advertise all ports seperated by a ';' char that matched the above criteria,
+ * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
+ * To solve this by default we now only display the first IP:port found and let the user
+ * configure the exact value for the 005 token, if necessary.
+ */
+ sslports = portid;
+ break;
+ }
+ }
+ }
}
- virtual void OnModuleRehash(User* user, const std::string ¶m)
+ void OnModuleRehash(User* user, const std::string ¶m)
{
if(param != "ssl")
return;
+ std::string keyfile;
+ std::string certfile;
+ std::string cafile;
+ std::string crlfile;
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("gnutls", "cafile", 0);
- crlfile = Conf.ReadValue("gnutls", "crlfile", 0);
- certfile = Conf.ReadValue("gnutls", "certfile", 0);
- keyfile = Conf.ReadValue("gnutls", "keyfile", 0);
- dh_bits = Conf.ReadInteger("gnutls", "dhbits", 0, false);
+ ConfigTag* Conf = ServerInstance->Config->ConfValue("gnutls");
- // Set all the default values needed.
- if (cafile.empty())
- cafile = "ca.pem";
+ cafile = Conf->getString("cafile", CONFIG_PATH "/ca.pem");
+ crlfile = Conf->getString("crlfile", CONFIG_PATH "/crl.pem");
+ certfile = Conf->getString("certfile", CONFIG_PATH "/cert.pem");
+ keyfile = Conf->getString("keyfile", CONFIG_PATH "/key.pem");
+ dh_bits = Conf->getInt("dhbits");
+ std::string hashname = Conf->getString("hash", "md5");
- if (crlfile.empty())
- crlfile = "crl.pem";
-
- if (certfile.empty())
- certfile = "cert.pem";
-
- if (keyfile.empty())
- keyfile = "key.pem";
+ // The GnuTLS manual states that the gnutls_set_default_priority()
+ // call we used previously when initializing the session is the same
+ // as setting the "NORMAL" priority string.
+ // Thus if the setting below is not in the config we will behave exactly
+ // the same as before, when the priority setting wasn't available.
+ std::string priorities = Conf->getString("priority", "NORMAL");
if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
dh_bits = 1024;
- // Prepend relative paths with the path to the config directory.
- if ((cafile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(cafile)))
- cafile = confdir + cafile;
-
- if ((crlfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(crlfile)))
- crlfile = confdir + crlfile;
-
- if ((certfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(certfile)))
- certfile = confdir + certfile;
+ if (hashname == "md5")
+ hash = GNUTLS_DIG_MD5;
+ else if (hashname == "sha1")
+ hash = GNUTLS_DIG_SHA1;
+ else
+ throw ModuleException("Unknown hash type " + hashname);
- if ((keyfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(keyfile)))
- keyfile = confdir + keyfile;
int ret;
+ if (dh_alloc)
+ {
+ gnutls_dh_params_deinit(dh_params);
+ dh_alloc = false;
+ dh_params = NULL;
+ }
+
if (cred_alloc)
{
// Deallocate the old credentials
- gnutls_dh_params_deinit(dh_params);
gnutls_certificate_free_credentials(x509_cred);
+
+ for(unsigned int i=0; i < x509_certs.size(); i++)
+ gnutls_x509_crt_deinit(x509_certs[i]);
+ x509_certs.clear();
}
- else
- cred_alloc = true;
- if((ret = gnutls_certificate_allocate_credentials(&x509_cred)) < 0)
+ ret = gnutls_certificate_allocate_credentials(&x509_cred);
+ cred_alloc = (ret >= 0);
+ if (!cred_alloc)
ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %s", gnutls_strerror(ret));
- if((ret = gnutls_dh_params_init(&dh_params)) < 0)
- ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
-
if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret));
if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret));
- if((ret = gnutls_certificate_set_x509_key_file (x509_cred, certfile.c_str(), keyfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
+ FileReader reader;
+
+ reader.LoadFile(certfile);
+ std::string cert_string = reader.Contents();
+ gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), static_cast<unsigned int>(cert_string.length()) };
+
+ reader.LoadFile(keyfile);
+ std::string key_string = reader.Contents();
+ gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), static_cast<unsigned int>(key_string.length()) };
+
+ // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
+ unsigned int certcount = 3;
+ x509_certs.resize(certcount);
+ ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
+ if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
+ {
+ // the buffer wasn't big enough to hold all certs but gnutls updated certcount to the number of available certs, try again with a bigger buffer
+ x509_certs.resize(certcount);
+ ret = gnutls_x509_crt_list_import(&x509_certs[0], &certcount, &cert_datum, GNUTLS_X509_FMT_PEM, GNUTLS_X509_CRT_LIST_IMPORT_FAIL_IF_EXCEED);
+ }
+
+ if (ret <= 0)
+ {
+ // clear the vector so we won't call gnutls_x509_crt_deinit() on the (uninited) certs later
+ x509_certs.clear();
+ throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + ((ret < 0) ? (std::string(gnutls_strerror(ret))) : "No certs could be read"));
+ }
+ x509_certs.resize(ret);
+
+ if((ret = gnutls_x509_privkey_import(x509_key, &key_datum, GNUTLS_X509_FMT_PEM)) < 0)
+ throw ModuleException("Unable to load GnuTLS server private key (" + keyfile + "): " + std::string(gnutls_strerror(ret)));
+
+ if((ret = gnutls_certificate_set_x509_key(x509_cred, &x509_certs[0], certcount, x509_key)) < 0)
+ throw ModuleException("Unable to set GnuTLS cert/key pair: " + std::string(gnutls_strerror(ret)));
+
+ #ifdef GNUTLS_NEW_PRIO_API
+ // It's safe to call this every time as we cannot have this uninitialized, see constructor and below.
+ gnutls_priority_deinit(priority);
+
+ // Try to set the priorities for ciphers, kex methods etc. to the user supplied string
+ // If the user did not supply anything then the string is already set to "NORMAL"
+ const char* priocstr = priorities.c_str();
+ const char* prioerror;
+
+ if ((ret = gnutls_priority_init(&priority, priocstr, &prioerror)) < 0)
{
- // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
- throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + ", key: " + keyfile + "): " + std::string(gnutls_strerror(ret)));
+ // gnutls did not understand the user supplied string, log and fall back to the default priorities
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to set priorities to \"%s\": %s Syntax error at position %u, falling back to default (NORMAL)", priorities.c_str(), gnutls_strerror(ret), (unsigned int) (prioerror - priocstr));
+ gnutls_priority_init(&priority, "NORMAL", NULL);
}
- // This may be on a large (once a day or week) timer eventually.
- GenerateDHParams();
+ #else
+ if (priorities != "NORMAL")
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: You've set <gnutls:priority> to a value other than the default, but this is only supported with GnuTLS v2.1.7 or newer. Your GnuTLS version is older than that so the option will have no effect.");
+ #endif
+
+ #if(GNUTLS_VERSION_MAJOR < 2 || ( GNUTLS_VERSION_MAJOR == 2 && GNUTLS_VERSION_MINOR < 12 ) )
+ gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
+ #else
+ gnutls_certificate_set_retrieve_function (x509_cred, cert_callback);
+ #endif
+ ret = gnutls_dh_params_init(&dh_params);
+ dh_alloc = (ret >= 0);
+ if (!dh_alloc)
+ {
+ ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
+ return;
+ }
+
+ std::string dhfile = Conf->getString("dhfile");
+ if (!dhfile.empty())
+ {
+ // Try to load DH params from file
+ reader.LoadFile(dhfile);
+ std::string dhstring = reader.Contents();
+ gnutls_datum_t dh_datum = { (unsigned char*)dhstring.data(), static_cast<unsigned int>(dhstring.length()) };
+
+ if ((ret = gnutls_dh_params_import_pkcs3(dh_params, &dh_datum, GNUTLS_X509_FMT_PEM)) < 0)
+ {
+ // File unreadable or GnuTLS was unhappy with the contents, generate the DH primes now
+ ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT, "m_ssl_gnutls.so: Generating DH parameters because I failed to load them from file '%s': %s", dhfile.c_str(), gnutls_strerror(ret));
+ GenerateDHParams();
+ }
+ }
+ else
+ {
+ GenerateDHParams();
+ }
}
void GenerateDHParams()
// once a day, once a week or once a month. Depending on the
// security requirements.
+ if (!dh_alloc)
+ return;
+
int ret;
if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
}
- virtual ~ModuleSSLGnuTLS()
+ ~ModuleSSLGnuTLS()
{
- gnutls_dh_params_deinit(dh_params);
- gnutls_certificate_free_credentials(x509_cred);
+ for(unsigned int i=0; i < x509_certs.size(); i++)
+ gnutls_x509_crt_deinit(x509_certs[i]);
+
+ gnutls_x509_privkey_deinit(x509_key);
+ #ifdef GNUTLS_NEW_PRIO_API
+ gnutls_priority_deinit(priority);
+ #endif
+
+ if (dh_alloc)
+ gnutls_dh_params_deinit(dh_params);
+ if (cred_alloc)
+ gnutls_certificate_free_credentials(x509_cred);
+
gnutls_global_deinit();
- ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this);
delete[] sessions;
+ ServerInstance->GenRandom = &ServerInstance->HandleGenRandom;
}
- virtual void OnCleanup(int target_type, void* item)
+ void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
- User* user = static_cast<User*>(item);
+ LocalUser* user = IS_LOCAL(static_cast<User*>(item));
- if (user->GetIOHook() == this)
+ if (user && user->eh.GetIOHook() == this)
{
// User is using SSL, they're a local user, and they're using one of *our* SSL ports.
// Potentially there could be multiple SSL modules loaded at once on different ports.
ServerInstance->Users->QuitUser(user, "SSL module unloading");
- user->DelIOHook();
- }
- if (user->GetExt("ssl_cert"))
- {
- ssl_cert* tofree;
- user->GetExt("ssl_cert", tofree);
- delete tofree;
- user->Shrink("ssl_cert");
}
}
}
- virtual Version GetVersion()
+ Version GetVersion()
{
- return Version("$Id$", VF_VENDOR, API_VERSION);
+ return Version("Provides SSL support for clients", VF_VENDOR);
}
- virtual void On005Numeric(std::string &output)
+ void On005Numeric(std::string &output)
{
if (!sslports.empty())
output.append(" SSL=" + sslports);
- output.append(" STARTTLS");
+ if (starttls.enabled)
+ output.append(" STARTTLS");
}
- virtual void OnHookIO(EventHandler* user, ListenSocketBase* lsb)
+ void OnHookIO(StreamSocket* user, ListenSocket* lsb)
{
- if (!user->GetIOHook() && listenports.find(lsb) != listenports.end())
+ if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "gnutls")
{
/* Hook the user with our module */
user->AddIOHook(this);
}
}
- virtual const char* OnRequest(Request* request)
+ void OnRequest(Request& request)
{
- ISHRequest* ISR = static_cast<ISHRequest*>(request);
- if (strcmp("IS_NAME", request->GetId()) == 0)
- {
- return "gnutls";
- }
- else if (strcmp("IS_HOOK", request->GetId()) == 0)
- {
- const char* ret = "OK";
- try
- {
- ret = ISR->Sock->AddIOHook(this) ? "OK" : NULL;
- }
- catch (ModuleException &e)
- {
- return NULL;
- }
- return ret;
- }
- else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
- {
- return ISR->Sock->DelIOHook() ? "OK" : NULL;
- }
- else if (strcmp("IS_HSDONE", request->GetId()) == 0)
+ if (strcmp("GET_SSL_CERT", request.id) == 0)
{
- if (ISR->Sock->GetFd() < 0)
- return "OK";
+ SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
+ int fd = req.sock->GetFd();
+ issl_session* session = &sessions[fd];
- issl_session* session = &sessions[ISR->Sock->GetFd()];
- return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : "OK";
+ req.cert = session->cert;
}
- else if (strcmp("IS_ATTACH", request->GetId()) == 0)
- {
- if (ISR->Sock->GetFd() > -1)
- {
- issl_session* session = &sessions[ISR->Sock->GetFd()];
- if (session->sess)
- {
- if (static_cast<Extensible*>(ServerInstance->SE->GetRef(ISR->Sock->GetFd())) == static_cast<Extensible*>(ISR->Sock))
- {
- VerifyCertificate(session, 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)
+ void InitSession(StreamSocket* user, bool me_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];
-
- /* For STARTTLS: Don't try and init a session on a socket that already has a session */
- if (session->sess)
- return;
+ issl_session* session = &sessions[user->GetFd()];
- gnutls_init(&session->sess, GNUTLS_SERVER);
+ gnutls_init(&session->sess, me_server ? GNUTLS_SERVER : GNUTLS_CLIENT);
+ session->socket = user;
- gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
+ #ifdef GNUTLS_NEW_PRIO_API
+ gnutls_priority_set(session->sess, priority);
+ #else
+ gnutls_set_default_priority(session->sess);
+ #endif
gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
gnutls_dh_set_prime_bits(session->sess, dh_bits);
+ gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(session));
+ gnutls_transport_set_push_function(session->sess, gnutls_push_wrapper);
+ gnutls_transport_set_pull_function(session->sess, gnutls_pull_wrapper);
- gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(fd)); // Give gnutls the fd for the socket.
+ if (me_server)
+ gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
- gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
-
- Handshake(session, fd);
+ Handshake(session, user);
}
- virtual void OnRawSocketConnect(int fd)
+ void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
{
- /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
- if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
- return;
-
- issl_session* session = &sessions[fd];
-
- gnutls_init(&session->sess, GNUTLS_CLIENT);
+ issl_session* session = &sessions[user->GetFd()];
- gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
- gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
- gnutls_dh_set_prime_bits(session->sess, dh_bits);
- gnutls_transport_set_ptr(session->sess, reinterpret_cast<gnutls_transport_ptr_t>(fd)); // Give gnutls the fd for the socket.
+ /* For STARTTLS: Don't try and init a session on a socket that already has a session */
+ if (session->sess)
+ return;
- Handshake(session, fd);
+ InitSession(user, true);
}
- virtual void OnRawSocketClose(int fd)
+ void OnStreamSocketConnect(StreamSocket* user)
{
- /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
- if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds()))
- return;
-
- CloseSession(&sessions[fd]);
-
- EventHandler* user = ServerInstance->SE->GetRef(fd);
-
- if ((user) && (user->GetExt("ssl_cert")))
- {
- ssl_cert* tofree;
- user->GetExt("ssl_cert", tofree);
- delete tofree;
- user->Shrink("ssl_cert");
- }
+ InitSession(user, false);
}
- virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
+ void OnStreamSocketClose(StreamSocket* user)
{
- /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
- if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
- return 0;
+ CloseSession(&sessions[user->GetFd()]);
+ }
- issl_session* session = &sessions[fd];
+ int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
+ {
+ issl_session* session = &sessions[user->GetFd()];
if (!session->sess)
{
- readresult = 0;
CloseSession(session);
- return 1;
+ user->SetError("No SSL session");
+ return -1;
}
- if (session->status == ISSL_HANDSHAKING_READ)
+ if (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE)
{
// The handshake isn't finished, try to finish it.
- if(!Handshake(session, fd))
+ if(!Handshake(session, user))
{
- errno = session->status == ISSL_CLOSING ? EIO : EAGAIN;
- // Couldn't resume handshake.
+ if (session->status != ISSL_CLOSING)
+ return 0;
return -1;
}
}
- else if (session->status == ISSL_HANDSHAKING_WRITE)
- {
- errno = EAGAIN;
- MakePollWrite(fd);
- return -1;
- }
// If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
if (session->status == ISSL_HANDSHAKEN)
{
- unsigned int len = 0;
- while (len < count)
+ char* buffer = ServerInstance->GetReadBuffer();
+ size_t bufsiz = ServerInstance->Config->NetBufferSize;
+ int ret = gnutls_record_recv(session->sess, buffer, bufsiz);
+ if (ret > 0)
{
- int ret = gnutls_record_recv(session->sess, buffer + len, count - len);
- if (ret > 0)
- {
- len += ret;
- }
- else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
- {
- break;
- }
- else
- {
- if (ret != 0)
- ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT,
- "m_ssl_gnutls.so: Error while reading on fd %d: %s",
- fd, gnutls_strerror(ret));
-
- // if ret == 0, client closed connection.
- readresult = 0;
- CloseSession(session);
- return 1;
- }
+ recvq.append(buffer, ret);
+ return 1;
}
- readresult = len;
- if (len)
+ else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
{
- return 1;
+ return 0;
+ }
+ else if (ret == 0)
+ {
+ user->SetError("Connection closed");
+ CloseSession(session);
+ return -1;
}
else
{
- errno = EAGAIN;
+ user->SetError(gnutls_strerror(ret));
+ CloseSession(session);
return -1;
}
}
else if (session->status == ISSL_CLOSING)
- readresult = 0;
+ return -1;
- return 1;
+ return 0;
}
- virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
+ int OnStreamSocketWrite(StreamSocket* user, std::string& sendq)
{
- /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
- if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
- return 0;
-
- issl_session* session = &sessions[fd];
- const char* sendbuffer = buffer;
+ issl_session* session = &sessions[user->GetFd()];
if (!session->sess)
{
CloseSession(session);
- return 1;
+ user->SetError("No SSL session");
+ return -1;
}
- session->outbuf.append(sendbuffer, count);
- sendbuffer = session->outbuf.c_str();
- count = session->outbuf.size();
-
if (session->status == ISSL_HANDSHAKING_WRITE || session->status == ISSL_HANDSHAKING_READ)
{
// The handshake isn't finished, try to finish it.
- Handshake(session, fd);
- errno = session->status == ISSL_CLOSING ? EIO : EAGAIN;
+ Handshake(session, user);
+ if (session->status != ISSL_CLOSING)
+ return 0;
return -1;
}
if (session->status == ISSL_HANDSHAKEN)
{
- ret = gnutls_record_send(session->sess, sendbuffer, count);
+ ret = gnutls_record_send(session->sess, sendq.data(), sendq.length());
- if (ret == 0)
+ if (ret == (int)sendq.length())
{
- CloseSession(session);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_WRITE);
+ return 1;
}
- else if (ret < 0)
+ else if (ret > 0)
{
- if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)
- {
- ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT,
- "m_ssl_gnutls.so: Error while writing to fd %d: %s",
- fd, gnutls_strerror(ret));
- CloseSession(session);
- }
- else
- {
- errno = EAGAIN;
- }
+ sendq = sendq.substr(ret);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
}
- else
+ else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED || ret == 0)
{
- session->outbuf = session->outbuf.substr(ret);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
+ return 0;
+ }
+ else // (ret < 0)
+ {
+ user->SetError(gnutls_strerror(ret));
+ CloseSession(session);
+ return -1;
}
}
- if (!session->outbuf.empty())
- MakePollWrite(fd);
-
- /* Who's smart idea was it to return 1 when we havent written anything?
- * This fucks the buffer up in BufferedSocket :p
- */
- return ret < 1 ? 0 : ret;
+ return 0;
}
- bool Handshake(issl_session* session, int fd)
+ bool Handshake(issl_session* session, StreamSocket* user)
{
int ret = gnutls_handshake(session->sess);
{
// gnutls_handshake() wants to read() again.
session->status = ISSL_HANDSHAKING_READ;
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
}
else
{
// gnutls_handshake() wants to write() again.
session->status = ISSL_HANDSHAKING_WRITE;
- MakePollWrite(fd);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
}
}
else
{
- // Handshake failed.
- ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT,
- "m_ssl_gnutls.so: Handshake failed on fd %d: %s",
- fd, gnutls_strerror(ret));
+ user->SetError("Handshake Failed - " + std::string(gnutls_strerror(ret)));
CloseSession(session);
session->status = ISSL_CLOSING;
}
}
else
{
- // Handshake complete.
- // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
- EventHandler *extendme = ServerInstance->SE->GetRef(fd);
- if (extendme)
- {
- extendme->Extend("ssl");
- }
-
// Change the seesion state
session->status = ISSL_HANDSHAKEN;
+ VerifyCertificate(session,user);
+
// Finish writing, if any left
- MakePollWrite(fd);
+ ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
return true;
}
}
- virtual void OnPostConnect(User* user)
+ void OnUserConnect(LocalUser* user)
{
- // This occurs AFTER OnUserConnect so we can be sure the
- // protocol module has propagated the NICK message.
- if (user->GetIOHook() == this && (IS_LOCAL(user)))
+ if (user->eh.GetIOHook() == this)
{
- ssl_cert* certdata = VerifyCertificate(&sessions[user->GetFd()],user);
- if (sessions[user->GetFd()].sess)
+ if (sessions[user->eh.GetFd()].sess)
{
- std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->GetFd()].sess));
- cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->GetFd()].sess))).append("-");
- cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->GetFd()].sess)));
- user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), cipher.c_str());
+ const gnutls_session_t& sess = sessions[user->eh.GetFd()].sess;
+ std::string cipher = UnknownIfNULL(gnutls_kx_get_name(gnutls_kx_get(sess)));
+ cipher.append("-").append(UnknownIfNULL(gnutls_cipher_get_name(gnutls_cipher_get(sess)))).append("-");
+ cipher.append(UnknownIfNULL(gnutls_mac_get_name(gnutls_mac_get(sess))));
+
+ ssl_cert* cert = sessions[user->eh.GetFd()].cert;
+ if (cert->fingerprint.empty())
+ user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), cipher.c_str());
+ else
+ user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
+ " and your SSL fingerprint is %s", user->nick.c_str(), cipher.c_str(), cert->fingerprint.c_str());
}
-
- ServerInstance->PI->SendMetaData(user, "ssl", "ON");
- if (certdata)
- ServerInstance->PI->SendMetaData(user, "ssl_cert", certdata->GetMetaLine().c_str());
- }
- }
-
- void MakePollWrite(int fd)
- {
- //OnRawSocketWrite(fd, NULL, 0);
- EventHandler* eh = ServerInstance->SE->GetRef(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)
+ if (session->sess)
{
gnutls_bye(session->sess, GNUTLS_SHUT_WR);
gnutls_deinit(session->sess);
}
-
- session->outbuf.clear();
+ session->socket = NULL;
session->sess = NULL;
+ session->cert = NULL;
session->status = ISSL_NONE;
}
- ssl_cert* VerifyCertificate(issl_session* session, Extensible* user)
+ void VerifyCertificate(issl_session* session, StreamSocket* user)
{
if (!session->sess || !user)
- return NULL;
+ return;
unsigned int status;
const gnutls_datum_t* cert_list;
size_t digest_size = sizeof(digest);
size_t name_size = sizeof(name);
ssl_cert* certinfo = new ssl_cert;
-
- user->Extend("ssl_cert",certinfo);
+ session->cert = certinfo;
/* This verification function uses the trusted CAs in the credentials
* structure. So you must have installed one or more CA certificates.
if (ret < 0)
{
certinfo->error = std::string(gnutls_strerror(ret));
- return certinfo;
+ return;
}
certinfo->invalid = (status & GNUTLS_CERT_INVALID);
if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
{
certinfo->error = "No X509 keys sent";
- return certinfo;
+ return;
}
ret = gnutls_x509_crt_init(&cert);
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
- return certinfo;
+ return;
}
cert_list_size = 0;
if (cert_list == NULL)
{
certinfo->error = "No certificate was found";
- return certinfo;
+ goto info_done_dealloc;
}
/* This is not a real world example, since we only check the first
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
- return certinfo;
+ goto info_done_dealloc;
}
gnutls_x509_crt_get_dn(cert, name, &name_size);
gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
certinfo->issuer = name;
- if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0)
+ if ((ret = gnutls_x509_crt_get_fingerprint(cert, hash, digest, &digest_size)) < 0)
{
certinfo->error = gnutls_strerror(ret);
}
certinfo->error = "Not activated, or expired certificate";
}
+info_done_dealloc:
gnutls_x509_crt_deinit(cert);
-
- return certinfo;
- }
-
- void OnEvent(Event* ev)
- {
- GenericCapHandler(ev, "tls", "tls");
}
- void Prioritize()
+ void OnEvent(Event& ev)
{
- Module* server = ServerInstance->Modules->Find("m_spanningtree.so");
- ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIORITY_AFTER, &server);
+ if (starttls.enabled)
+ capHandler.HandleEvent(ev);
}
};
projects / user / henk / code / inspircd.git / blobdiff