/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2012 edem <edem@irc2.hu>
* Copyright (C) 2009-2010, 2012 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 file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#include "transport.h"
#include "m_cap.h"
#ifdef WINDOWS
#pragma comment(lib, "libgnutls-13.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) */
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
static bool isin(const std::string &host, int port, const std::vector<std::string> &portlist)
{
if (std::find(portlist.begin(), portlist.end(), "*:" + ConvToStr(port)) != portlist.end())
return true;
if (std::find(portlist.begin(), portlist.end(), ":" + ConvToStr(port)) != portlist.end())
return true;
if (host.find('.') != std::string::npos && std::find(portlist.begin(), portlist.end(), "0.0.0.0:" + ConvToStr(port)) != portlist.end())
return true;
if (host.find(':') != std::string::npos && std::find(portlist.begin(), portlist.end(), ":::" + ConvToStr(port)) != portlist.end())
return true;
return std::find(portlist.begin(), portlist.end(), host + ":" + ConvToStr(port)) != portlist.end();
}
static std::vector<gnutls_x509_crt_t> x509_certs;
static gnutls_x509_privkey_t x509_key;
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;
st->ncerts = x509_certs.size();
st->cert.x509 = &x509_certs[0];
st->key.x509 = x509_key;
st->deinit_all = 0;
return 0;
}
/** Represents an SSL user's extra data
*/
class issl_session : public classbase
{
public:
issl_session()
{
sess = NULL;
}
gnutls_session_t sess;
issl_status status;
std::string outbuf;
};
class CommandStartTLS : public Command
{
Module* Caller;
public:
CommandStartTLS (InspIRCd* Instance, Module* mod) : Command(Instance,"STARTTLS", 0, 0, true), Caller(mod)
{
this->source = "m_ssl_gnutls.so";
}
CmdResult Handle (const std::vector<std::string> ¶meters, User *user)
{
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())
{
user->WriteNumeric(670, "%s :STARTTLS successful, go ahead with TLS handshake", user->nick.c_str());
user->AddIOHook(Caller);
Caller->OnRawSocketAccept(user->GetFd(), user->GetIPString(), user->GetPort());
}
else
user->WriteNumeric(691, "%s :STARTTLS failure", user->nick.c_str());
}
return CMD_FAILURE;
}
};
class ModuleSSLGnuTLS : public Module
{
std::vector<std::string> listenports;
issl_session* sessions;
gnutls_certificate_credentials x509_cred;
gnutls_dh_params dh_params;
std::string keyfile;
std::string certfile;
std::string cafile;
std::string crlfile;
std::string sslports;
int dh_bits;
int clientactive;
bool cred_alloc;
CommandStartTLS* starttls;
public:
ModuleSSLGnuTLS(InspIRCd* Me)
: Module(Me)
{
ServerInstance->Modules->PublishInterface("BufferedSocketHook", this);
sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
gnutls_global_init(); // This must be called once in the program
gnutls_x509_privkey_init(&x509_key);
cred_alloc = false;
// Needs the flag as it ignores a plain /rehash
OnModuleRehash(NULL,"ssl");
// 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_OnUnloadModule, I_OnRehash, I_OnModuleRehash,
I_OnPostConnect, I_OnEvent, I_OnHookUserIO };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
starttls = new CommandStartTLS(ServerInstance, this);
ServerInstance->AddCommand(starttls);
}
virtual void OnRehash(User* user)
{
ConfigReader Conf(ServerInstance);
listenports.clear();
clientactive = 0;
sslports.clear();
for(int index = 0; index < Conf.Enumerate("bind"); index++)
{
// For each <bind> tag
std::string x = Conf.ReadValue("bind", "type", index);
if(((x.empty()) || (x == "clients")) && (Conf.ReadValue("bind", "ssl", index) == "gnutls"))
{
// Get the port we're meant to be listening on with SSL
std::string port = Conf.ReadValue("bind", "port", index);
std::string addr = Conf.ReadValue("bind", "address", index);
if (!addr.empty())
{
// normalize address, important for IPv6
int portint = 0;
irc::sockets::sockaddrs bin;
if (irc::sockets::aptosa(addr.c_str(), portint, &bin))
irc::sockets::satoap(&bin, addr, portint);
}
irc::portparser portrange(port, false);
long portno = -1;
while ((portno = portrange.GetToken()))
{
clientactive++;
try
{
listenports.push_back(addr + ":" + ConvToStr(portno));
for (size_t i = 0; i < ServerInstance->ports.size(); i++)
if ((ServerInstance->ports[i]->GetPort() == portno) && (ServerInstance->ports[i]->GetIP() == addr))
ServerInstance->ports[i]->SetDescription("ssl");
ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %ld", portno);
if (addr != "127.0.0.1")
sslports.append((addr.empty() ? "*" : addr)).append(":").append(ConvToStr(portno)).append(";");
}
catch (ModuleException &e)
{
ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %ld: %s. Maybe it's already hooked by the same port on a different IP, or you have an other SSL or similar module loaded?", portno, e.GetReason());
}
}
}
}
if (!sslports.empty())
sslports.erase(sslports.end() - 1);
}
virtual void OnModuleRehash(User* user, const std::string ¶m)
{
if(param != "ssl")
return;
OnRehash(user);
ConfigReader Conf(ServerInstance);
std::string confdir(ServerInstance->ConfigFileName);
// +1 so we the path ends with a /
confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
cafile = Conf.ReadValue("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);
// Set all the default values needed.
if (cafile.empty())
cafile = "ca.pem";
if (crlfile.empty())
crlfile = "crl.pem";
if (certfile.empty())
certfile = "cert.pem";
if (keyfile.empty())
keyfile = "key.pem";
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 ((keyfile[0] != '/') && (!ServerInstance->Config->StartsWithWindowsDriveLetter(keyfile)))
keyfile = confdir + keyfile;
int ret;
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)
ServerInstance->Logs->Log("m_ssl_gnutls",DEBUG, "m_ssl_gnutls.so: Failed to allocate certificate credentials: %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));
FileReader reader(ServerInstance);
reader.LoadFile(certfile);
std::string cert_string = reader.Contents();
gnutls_datum_t cert_datum = { (unsigned char*)cert_string.data(), cert_string.length() };
reader.LoadFile(keyfile);
std::string key_string = reader.Contents();
gnutls_datum_t key_datum = { (unsigned char*)key_string.data(), key_string.length() };
// If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
unsigned int certcount = Conf.ReadInteger("gnutls", "certcount", 0, false);
if (!certcount)
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 < 0)
throw ModuleException("Unable to load GnuTLS server certificate (" + certfile + "): " + std::string(gnutls_strerror(ret)));
x509_certs.resize(certcount);
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)));
gnutls_certificate_client_set_retrieve_function (x509_cred, cert_callback);
if((ret = gnutls_dh_params_init(&dh_params)) < 0)
ServerInstance->Logs->Log("m_ssl_gnutls",DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters: %s", gnutls_strerror(ret));
// This may be on a large (once a day or week) timer eventually.
GenerateDHParams();
}
void GenerateDHParams()
{
// Generate Diffie Hellman parameters - for use with DHE
// kx algorithms. These should be discarded and regenerated
// once a day, once a week or once a month. Depending on the
// security requirements.
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()
{
for(unsigned int i=0; i < x509_certs.size(); i++)
gnutls_x509_crt_deinit(x509_certs[i]);
x509_certs.clear();
gnutls_x509_privkey_deinit(x509_key);
gnutls_dh_params_deinit(dh_params);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
ServerInstance->Modules->UnpublishInterface("BufferedSocketHook", this);
delete[] sessions;
}
virtual void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
User* user = (User*)item;
if (user->GetIOHook() == this)
{
// User is using SSL, they're a local user, and they're using one of *our* SSL ports.
// Potentially there could be multiple SSL modules loaded at once on different ports.
ServerInstance->Users->QuitUser(user, "SSL module unloading");
user->DelIOHook();
}
if (user->GetExt("ssl_cert"))
{
ssl_cert* tofree;
user->GetExt("ssl_cert", tofree);
delete tofree;
user->Shrink("ssl_cert");
}
}
}
virtual void OnUnloadModule(Module* mod, const std::string &name)
{
if(mod == this)
{
for(unsigned int i = 0; i < listenports.size(); i++)
{
for (size_t j = 0; j < ServerInstance->ports.size(); j++)
if (listenports[i] == (ServerInstance->ports[j]->GetIP()+":"+ConvToStr(ServerInstance->ports[j]->GetPort())))
ServerInstance->ports[j]->SetDescription("plaintext");
}
}
}
virtual Version GetVersion()
{
return Version("$Id$", VF_VENDOR, API_VERSION);
}
virtual void On005Numeric(std::string &output)
{
if (!sslports.empty())
output.append(" SSL=" + sslports);
output.append(" STARTTLS");
}
virtual void OnHookUserIO(User* user, const std::string &targetip)
{
if (!user->GetIOHook() && isin(targetip,user->GetPort(),listenports))
{
/* Hook the user with our module */
user->AddIOHook(this);
}
}
virtual const char* OnRequest(Request* request)
{
ISHRequest* ISR = (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((Module*)this) ? "OK" : NULL;
}
catch (ModuleException &e)
{
return NULL;
}
return ret;
}
else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
{
return ISR->Sock->DelIOHook() ? "OK" : NULL;
}
else if (strcmp("IS_HSDONE", request->GetId()) == 0)
{
if (ISR->Sock->GetFd() < 0)
return "OK";
issl_session* session = &sessions[ISR->Sock->GetFd()];
return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : "OK";
}
else if (strcmp("IS_ATTACH", request->GetId()) == 0)
{
if (ISR->Sock->GetFd() > -1)
{
issl_session* session = &sessions[ISR->Sock->GetFd()];
if (session->sess)
{
if ((Extensible*)ServerInstance->SE->GetRef(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock))
{
VerifyCertificate(session, (BufferedSocket*)ISR->Sock);
return "OK";
}
}
}
}
else if (strcmp("GET_FP", request->GetId()) == 0)
{
if (ISR->Sock->GetFd() > -1)
{
issl_session* session = &sessions[ISR->Sock->GetFd()];
if (session->sess)
{
Extensible* ext = ISR->Sock;
ssl_cert* certinfo;
if (ext->GetExt("ssl_cert",certinfo))
return certinfo->GetFingerprint().c_str();
}
}
}
return NULL;
}
virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
{
/* 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;
gnutls_init(&session->sess, GNUTLS_SERVER);
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, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
Handshake(session, fd);
}
virtual void OnRawSocketConnect(int fd)
{
/* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
return;
issl_session* session = &sessions[fd];
gnutls_init(&session->sess, GNUTLS_CLIENT);
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, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
Handshake(session, fd);
}
virtual void OnRawSocketClose(int fd)
{
/* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds()))
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");
}
}
virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
{
/* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
return 0;
issl_session* session = &sessions[fd];
if (!session->sess)
{
readresult = 0;
CloseSession(session);
return 1;
}
if (session->status == ISSL_HANDSHAKING_READ)
{
// The handshake isn't finished, try to finish it.
if(!Handshake(session, fd))
{
errno = session->status == ISSL_CLOSING ? EIO : EAGAIN;
// Couldn't resume handshake.
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)
{
int ret = gnutls_record_recv(session->sess, buffer, count);
if (ret > 0)
{
readresult = ret;
}
else if (ret == 0)
{
// Client closed connection.
readresult = 0;
CloseSession(session);
return 1;
}
else if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
{
errno = EAGAIN;
return -1;
}
else
{
ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT,
"m_ssl_gnutls.so: Error while reading on fd %d: %s",
fd, gnutls_strerror(ret));
readresult = 0;
CloseSession(session);
}
}
else if(session->status == ISSL_CLOSING)
readresult = 0;
return 1;
}
virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
{
/* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
return 0;
issl_session* session = &sessions[fd];
const char* sendbuffer = buffer;
if (!session->sess)
{
CloseSession(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;
return -1;
}
int ret = 0;
if (session->status == ISSL_HANDSHAKEN)
{
ret = gnutls_record_send(session->sess, sendbuffer, count);
if (ret == 0)
{
CloseSession(session);
}
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;
}
}
else
{
session->outbuf = session->outbuf.substr(ret);
}
}
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;
}
bool Handshake(issl_session* session, int fd)
{
int ret = gnutls_handshake(session->sess);
if (ret < 0)
{
if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
{
// Handshake needs resuming later, read() or write() would have blocked.
if(gnutls_record_get_direction(session->sess) == 0)
{
// gnutls_handshake() wants to read() again.
session->status = ISSL_HANDSHAKING_READ;
}
else
{
// gnutls_handshake() wants to write() again.
session->status = ISSL_HANDSHAKING_WRITE;
MakePollWrite(fd);
}
}
else
{
// Handshake failed.
ServerInstance->Logs->Log("m_ssl_gnutls", DEFAULT,
"m_ssl_gnutls.so: Handshake failed on fd %d: %s",
fd, gnutls_strerror(ret));
CloseSession(session);
session->status = ISSL_CLOSING;
}
return false;
}
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)
{
if (!extendme->GetExt("ssl"))
extendme->Extend("ssl", "ON");
}
// Change the seesion state
session->status = ISSL_HANDSHAKEN;
// Finish writing, if any left
MakePollWrite(fd);
return true;
}
}
virtual void OnPostConnect(User* user)
{
// This occurs AFTER OnUserConnect so we can be sure the
// protocol module has propagated the NICK message.
if (user->GetIOHook() == this && (IS_LOCAL(user)))
{
ssl_cert* certdata = VerifyCertificate(&sessions[user->GetFd()],user);
if (sessions[user->GetFd()].sess)
{
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());
}
ServerInstance->PI->SendMetaData(user, TYPE_USER, "ssl", "ON");
if (certdata)
ServerInstance->PI->SendMetaData(user, TYPE_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)
{
gnutls_bye(session->sess, GNUTLS_SHUT_WR);
gnutls_deinit(session->sess);
}
session->outbuf.clear();
session->sess = NULL;
session->status = ISSL_NONE;
}
ssl_cert* VerifyCertificate(issl_session* session, Extensible* user)
{
if (!session->sess || !user)
return NULL;
unsigned int status;
const gnutls_datum_t* cert_list;
int ret;
unsigned int cert_list_size;
gnutls_x509_crt_t cert;
char name[MAXBUF];
unsigned char digest[MAXBUF];
size_t digest_size = sizeof(digest);
size_t name_size = sizeof(name);
ssl_cert* certinfo = new ssl_cert;
user->Extend("ssl_cert",certinfo);
/* This verification function uses the trusted CAs in the credentials
* structure. So you must have installed one or more CA certificates.
*/
ret = gnutls_certificate_verify_peers2(session->sess, &status);
if (ret < 0)
{
certinfo->error = std::string(gnutls_strerror(ret));
return certinfo;
}
certinfo->invalid = (status & GNUTLS_CERT_INVALID);
certinfo->unknownsigner = (status & GNUTLS_CERT_SIGNER_NOT_FOUND);
certinfo->revoked = (status & GNUTLS_CERT_REVOKED);
certinfo->trusted = !(status & GNUTLS_CERT_SIGNER_NOT_CA);
/* Up to here the process is the same for X.509 certificates and
* OpenPGP keys. From now on X.509 certificates are assumed. This can
* be easily extended to work with openpgp keys as well.
*/
if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
{
certinfo->error = "No X509 keys sent";
return certinfo;
}
ret = gnutls_x509_crt_init(&cert);
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
return certinfo;
}
cert_list_size = 0;
cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
if (cert_list == NULL)
{
certinfo->error = "No certificate was found";
return certinfo;
}
/* This is not a real world example, since we only check the first
* certificate in the given chain.
*/
ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
if (ret < 0)
{
certinfo->error = gnutls_strerror(ret);
return certinfo;
}
gnutls_x509_crt_get_dn(cert, name, &name_size);
certinfo->dn = name;
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)
{
certinfo->error = gnutls_strerror(ret);
}
else
{
certinfo->fingerprint = irc::hex(digest, digest_size);
}
/* Beware here we do not check for errors.
*/
if ((gnutls_x509_crt_get_expiration_time(cert) < ServerInstance->Time()) || (gnutls_x509_crt_get_activation_time(cert) > ServerInstance->Time()))
{
certinfo->error = "Not activated, or expired certificate";
}
gnutls_x509_crt_deinit(cert);
return certinfo;
}
void OnEvent(Event* ev)
{
GenericCapHandler(ev, "tls", "tls");
}
void Prioritize()
{
Module* server = ServerInstance->Modules->Find("m_spanningtree.so");
ServerInstance->Modules->SetPriority(this, I_OnPostConnect, PRIORITY_AFTER, &server);
}
};
MODULE_INIT(ModuleSSLGnuTLS)
