1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r\r#include <gnutls/gnutls.h>
\r#include <gnutls/x509.h>
\r\r#include "inspircd_config.h"
\r#include "configreader.h"
\r#include "users.h"
\r#include "channels.h"
\r#include "modules.h"
\r#include "socket.h"
\r#include "hashcomp.h"
\r#include "transport.h"
\r\r#ifdef WINDOWS
\r#pragma comment(lib, "libgnutls-13.lib")
\r#undef MAX_DESCRIPTORS
\r#define MAX_DESCRIPTORS 10000
\r#endif
\r\r/* $ModDesc: Provides SSL support for clients */
\r/* $CompileFlags: exec("libgnutls-config --cflags") */
\r/* $LinkerFlags: rpath("libgnutls-config --libs") exec("libgnutls-config --libs") */
\r/* $ModDep: transport.h */
\r\r\renum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
\r\rbool isin(int port, const std::vector<int> &portlist)
\r{
\r for(unsigned int i = 0; i < portlist.size(); i++)
\r if(portlist[i] == port)
\r return true;
\r\r return false;
\r}
\r\r/** Represents an SSL user's extra data
\r */
\rclass issl_session : public classbase
\r{
\rpublic:
\r gnutls_session_t sess;
\r issl_status status;
\r std::string outbuf;
\r int inbufoffset;
\r char* inbuf;
\r int fd;
\r};
\r\rclass ModuleSSLGnuTLS : public Module
\r{
\r\r ConfigReader* Conf;
\r\r char* dummy;
\r\r std::vector<int> listenports;
\r\r int inbufsize;
\r issl_session sessions[MAX_DESCRIPTORS];
\r\r gnutls_certificate_credentials x509_cred;
\r gnutls_dh_params dh_params;
\r\r std::string keyfile;
\r std::string certfile;
\r std::string cafile;
\r std::string crlfile;
\r std::string sslports;
\r int dh_bits;
\r\r int clientactive;
\r\r public:
\r\r ModuleSSLGnuTLS(InspIRCd* Me)
\r : Module(Me)
\r {
\r ServerInstance->PublishInterface("InspSocketHook", this);
\r\r // Not rehashable...because I cba to reduce all the sizes of existing buffers.
\r inbufsize = ServerInstance->Config->NetBufferSize;
\r\r gnutls_global_init(); // This must be called once in the program
\r\r if(gnutls_certificate_allocate_credentials(&x509_cred) != 0)
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to allocate certificate credentials");
\r\r // Guessing return meaning
\r if(gnutls_dh_params_init(&dh_params) < 0)
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters");
\r\r // Needs the flag as it ignores a plain /rehash
\r OnRehash(NULL,"ssl");
\r\r // Void return, guess we assume success
\r gnutls_certificate_set_dh_params(x509_cred, dh_params);
\r }
\r\r virtual void OnRehash(userrec* user, const std::string ¶m)
\r {
\r if(param != "ssl")
\r return;
\r\r Conf = new ConfigReader(ServerInstance);
\r\r for(unsigned int i = 0; i < listenports.size(); i++)
\r {
\r ServerInstance->Config->DelIOHook(listenports[i]);
\r }
\r\r listenports.clear();
\r clientactive = 0;
\r sslports.clear();
\r\r for(int i = 0; i < Conf->Enumerate("bind"); i++)
\r {
\r // For each <bind> tag
\r std::string x = Conf->ReadValue("bind", "type", i);
\r if(((x.empty()) || (x == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "gnutls"))
\r {
\r // Get the port we're meant to be listening on with SSL
\r std::string port = Conf->ReadValue("bind", "port", i);
\r irc::portparser portrange(port, false);
\r long portno = -1;
\r while ((portno = portrange.GetToken()))
\r {
\r clientactive++;
\r try
\r {
\r if (ServerInstance->Config->AddIOHook(portno, this))
\r {
\r listenports.push_back(portno);
\r for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++)
\r if (ServerInstance->Config->ports[i]->GetPort() == portno)
\r ServerInstance->Config->ports[i]->SetDescription("ssl");
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %d", portno);
\r sslports.append("*:").append(ConvToStr(portno)).append(";");
\r }
\r else
\r {
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
\r }
\r }
\r catch (ModuleException &e)
\r {
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d: %s. Maybe it's already hooked by the same port on a different IP, or you have an other SSL or similar module loaded?", portno, e.GetReason());
\r }
\r }
\r }
\r }
\r\r std::string confdir(ServerInstance->ConfigFileName);
\r // +1 so we the path ends with a /
\r confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
\r\r cafile = Conf->ReadValue("gnutls", "cafile", 0);
\r crlfile = Conf->ReadValue("gnutls", "crlfile", 0);
\r certfile = Conf->ReadValue("gnutls", "certfile", 0);
\r keyfile = Conf->ReadValue("gnutls", "keyfile", 0);
\r dh_bits = Conf->ReadInteger("gnutls", "dhbits", 0, false);
\r\r // Set all the default values needed.
\r if (cafile.empty())
\r cafile = "ca.pem";
\r\r if (crlfile.empty())
\r crlfile = "crl.pem";
\r\r if (certfile.empty())
\r certfile = "cert.pem";
\r\r if (keyfile.empty())
\r keyfile = "key.pem";
\r\r if((dh_bits != 768) && (dh_bits != 1024) && (dh_bits != 2048) && (dh_bits != 3072) && (dh_bits != 4096))
\r dh_bits = 1024;
\r\r // Prepend relative paths with the path to the config directory.
\r if(cafile[0] != '/')
\r cafile = confdir + cafile;
\r\r if(crlfile[0] != '/')
\r crlfile = confdir + crlfile;
\r\r if(certfile[0] != '/')
\r certfile = confdir + certfile;
\r\r if(keyfile[0] != '/')
\r keyfile = confdir + keyfile;
\r\r int ret;
\r\r if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 trust file '%s': %s", cafile.c_str(), gnutls_strerror(ret));
\r\r if((ret = gnutls_certificate_set_x509_crl_file (x509_cred, crlfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to set X.509 CRL file '%s': %s", crlfile.c_str(), gnutls_strerror(ret));
\r\r if((ret = gnutls_certificate_set_x509_key_file (x509_cred, certfile.c_str(), keyfile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
\r {
\r // If this fails, no SSL port will work. At all. So, do the smart thing - throw a ModuleException
\r throw ModuleException("Unable to load GnuTLS server certificate: " + std::string(gnutls_strerror(ret)));
\r }
\r\r // This may be on a large (once a day or week) timer eventually.
\r GenerateDHParams();
\r\r DELETE(Conf);
\r }
\r\r void GenerateDHParams()
\r {
\r // Generate Diffie Hellman parameters - for use with DHE
\r // kx algorithms. These should be discarded and regenerated
\r // once a day, once a week or once a month. Depending on the
\r // security requirements.
\r\r int ret;
\r\r if((ret = gnutls_dh_params_generate2(dh_params, dh_bits)) < 0)
\r ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
\r }
\r\r virtual ~ModuleSSLGnuTLS()
\r {
\r gnutls_dh_params_deinit(dh_params);
\r gnutls_certificate_free_credentials(x509_cred);
\r gnutls_global_deinit();
\r }
\r\r virtual void OnCleanup(int target_type, void* item)
\r {
\r if(target_type == TYPE_USER)
\r {
\r userrec* user = (userrec*)item;
\r\r if(user->GetExt("ssl", dummy) && isin(user->GetPort(), listenports))
\r {
\r // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
\r // Potentially there could be multiple SSL modules loaded at once on different ports.
\r ServerInstance->GlobalCulls.AddItem(user, "SSL module unloading");
\r }
\r if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
\r {
\r ssl_cert* tofree;
\r user->GetExt("ssl_cert", tofree);
\r delete tofree;
\r user->Shrink("ssl_cert");
\r }
\r }
\r }
\r\r virtual void OnUnloadModule(Module* mod, const std::string &name)
\r {
\r if(mod == this)
\r {
\r for(unsigned int i = 0; i < listenports.size(); i++)
\r {
\r ServerInstance->Config->DelIOHook(listenports[i]);
\r for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)
\r if (ServerInstance->Config->ports[j]->GetPort() == listenports[i])
\r ServerInstance->Config->ports[j]->SetDescription("plaintext");
\r }
\r }
\r }
\r\r virtual Version GetVersion()
\r {
\r return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
\r }
\r\r void Implements(char* List)
\r {
\r List[I_On005Numeric] = List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
\r List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
\r }
\r\r virtual void On005Numeric(std::string &output)
\r {
\r output.append(" SSL=" + sslports);
\r }
\r\r virtual char* OnRequest(Request* request)
\r {
\r ISHRequest* ISR = (ISHRequest*)request;
\r if (strcmp("IS_NAME", request->GetId()) == 0)
\r {
\r return "gnutls";
\r }
\r else if (strcmp("IS_HOOK", request->GetId()) == 0)
\r {
\r char* ret = "OK";
\r try
\r {
\r ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
\r }
\r catch (ModuleException &e)
\r {
\r return NULL;
\r }
\r return ret;
\r }
\r else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
\r {
\r return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
\r }
\r else if (strcmp("IS_HSDONE", request->GetId()) == 0)
\r {
\r if (ISR->Sock->GetFd() < 0)
\r return (char*)"OK";
\r\r issl_session* session = &sessions[ISR->Sock->GetFd()];
\r return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : (char*)"OK";
\r }
\r else if (strcmp("IS_ATTACH", request->GetId()) == 0)
\r {
\r if (ISR->Sock->GetFd() > -1)
\r {
\r issl_session* session = &sessions[ISR->Sock->GetFd()];
\r if (session->sess)
\r {
\r if ((Extensible*)ServerInstance->FindDescriptor(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock))
\r {
\r VerifyCertificate(session, (InspSocket*)ISR->Sock);
\r return "OK";
\r }
\r }
\r }
\r }
\r return NULL;
\r }
\r\r\r virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
\r {
\r issl_session* session = &sessions[fd];
\r\r session->fd = fd;
\r session->inbuf = new char[inbufsize];
\r session->inbufoffset = 0;
\r\r gnutls_init(&session->sess, GNUTLS_SERVER);
\r\r gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
\r gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
\r gnutls_dh_set_prime_bits(session->sess, dh_bits);
\r\r /* This is an experimental change to avoid a warning on 64bit systems about casting between integer and pointer of different sizes
\r * This needs testing, but it's easy enough to rollback if need be
\r * Old: gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
\r * New: gnutls_transport_set_ptr(session->sess, &fd); // Give gnutls the fd for the socket.
\r *
\r * With testing this seems to...not work :/
\r */
\r\r gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
\r\r gnutls_certificate_server_set_request(session->sess, GNUTLS_CERT_REQUEST); // Request client certificate if any.
\r\r Handshake(session);
\r }
\r\r virtual void OnRawSocketConnect(int fd)
\r {
\r issl_session* session = &sessions[fd];
\r\r session->fd = fd;
\r session->inbuf = new char[inbufsize];
\r session->inbufoffset = 0;
\r\r gnutls_init(&session->sess, GNUTLS_CLIENT);
\r\r gnutls_set_default_priority(session->sess); // Avoid calling all the priority functions, defaults are adequate.
\r gnutls_credentials_set(session->sess, GNUTLS_CRD_CERTIFICATE, x509_cred);
\r gnutls_dh_set_prime_bits(session->sess, dh_bits);
\r gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
\r\r Handshake(session);
\r }
\r\r virtual void OnRawSocketClose(int fd)
\r {
\r CloseSession(&sessions[fd]);
\r\r EventHandler* user = ServerInstance->SE->GetRef(fd);
\r\r if ((user) && (user->GetExt("ssl_cert", dummy)))
\r {
\r ssl_cert* tofree;
\r user->GetExt("ssl_cert", tofree);
\r delete tofree;
\r user->Shrink("ssl_cert");
\r }
\r }
\r\r virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
\r {
\r issl_session* session = &sessions[fd];
\r\r if (!session->sess)
\r {
\r readresult = 0;
\r CloseSession(session);
\r return 1;
\r }
\r\r if (session->status == ISSL_HANDSHAKING_READ)
\r {
\r // The handshake isn't finished, try to finish it.
\r\r if(!Handshake(session))
\r {
\r // Couldn't resume handshake.
\r return -1;
\r }
\r }
\r else if (session->status == ISSL_HANDSHAKING_WRITE)
\r {
\r errno = EAGAIN;
\r return -1;
\r }
\r\r // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
\r\r if (session->status == ISSL_HANDSHAKEN)
\r {
\r // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
\r // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
\r int ret = gnutls_record_recv(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
\r\r if (ret == 0)
\r {
\r // Client closed connection.
\r readresult = 0;
\r CloseSession(session);
\r return 1;
\r }
\r else if (ret < 0)
\r {
\r if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
\r {
\r errno = EAGAIN;
\r return -1;
\r }
\r else
\r {
\r readresult = 0;
\r CloseSession(session);
\r }
\r }
\r else
\r {
\r // Read successfully 'ret' bytes into inbuf + inbufoffset
\r // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
\r // 'buffer' is 'count' long
\r\r unsigned int length = ret + session->inbufoffset;
\r\r if(count <= length)
\r {
\r memcpy(buffer, session->inbuf, count);
\r // Move the stuff left in inbuf to the beginning of it
\r memcpy(session->inbuf, session->inbuf + count, (length - count));
\r // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
\r session->inbufoffset = length - count;
\r // Insp uses readresult as the count of how much data there is in buffer, so:
\r readresult = count;
\r }
\r else
\r {
\r // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
\r memcpy(buffer, session->inbuf, length);
\r // Zero the offset, as there's nothing there..
\r session->inbufoffset = 0;
\r // As above
\r readresult = length;
\r }
\r }
\r }
\r else if(session->status == ISSL_CLOSING)
\r readresult = 0;
\r\r return 1;
\r }
\r\r virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
\r {
\r if (!count)
\r return 0;
\r\r issl_session* session = &sessions[fd];
\r const char* sendbuffer = buffer;
\r\r if (!session->sess)
\r {
\r ServerInstance->Log(DEBUG,"No session");
\r CloseSession(session);
\r return 1;
\r }
\r\r session->outbuf.append(sendbuffer, count);
\r sendbuffer = session->outbuf.c_str();
\r count = session->outbuf.size();
\r\r if (session->status == ISSL_HANDSHAKING_WRITE)
\r {
\r // The handshake isn't finished, try to finish it.
\r ServerInstance->Log(DEBUG,"Finishing handshake");
\r Handshake(session);
\r errno = EAGAIN;
\r return -1;
\r }
\r\r int ret = 0;
\r\r if (session->status == ISSL_HANDSHAKEN)
\r {
\r ServerInstance->Log(DEBUG,"Send record");
\r ret = gnutls_record_send(session->sess, sendbuffer, count);
\r ServerInstance->Log(DEBUG,"Return: %d", ret);
\r\r if (ret == 0)
\r {
\r CloseSession(session);
\r }
\r else if (ret < 0)
\r {
\r if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)
\r {
\r ServerInstance->Log(DEBUG,"Not egain or interrupt, close session");
\r CloseSession(session);
\r }
\r else
\r {
\r ServerInstance->Log(DEBUG,"Again please");
\r errno = EAGAIN;
\r return -1;
\r }
\r }
\r else
\r {
\r ServerInstance->Log(DEBUG,"Trim buffer");
\r session->outbuf = session->outbuf.substr(ret);
\r }
\r }
\r\r /* Who's smart idea was it to return 1 when we havent written anything?
\r * This fucks the buffer up in InspSocket :p
\r */
\r return ret < 1 ? 0 : ret;
\r }
\r\r // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
\r virtual void OnWhois(userrec* source, userrec* dest)
\r {
\r if (!clientactive)
\r return;
\r\r // Bugfix, only send this numeric for *our* SSL users
\r if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) && isin(dest->GetPort(), listenports)))
\r {
\r ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
\r }
\r }
\r\r virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname, bool displayable)
\r {
\r // check if the linking module wants to know about OUR metadata
\r if(extname == "ssl")
\r {
\r // check if this user has an swhois field to send
\r if(user->GetExt(extname, dummy))
\r {
\r // call this function in the linking module, let it format the data how it
\r // sees fit, and send it on its way. We dont need or want to know how.
\r proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON");
\r }
\r }
\r }
\r\r virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
\r {
\r // check if its our metadata key, and its associated with a user
\r if ((target_type == TYPE_USER) && (extname == "ssl"))
\r {
\r userrec* dest = (userrec*)target;
\r // if they dont already have an ssl flag, accept the remote server's
\r if (!dest->GetExt(extname, dummy))
\r {
\r dest->Extend(extname, "ON");
\r }
\r }
\r }
\r\r bool Handshake(issl_session* session)
\r {
\r int ret = gnutls_handshake(session->sess);
\r\r if (ret < 0)
\r {
\r if(ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
\r {
\r // Handshake needs resuming later, read() or write() would have blocked.
\r\r if(gnutls_record_get_direction(session->sess) == 0)
\r {
\r // gnutls_handshake() wants to read() again.
\r session->status = ISSL_HANDSHAKING_READ;
\r }
\r else
\r {
\r // gnutls_handshake() wants to write() again.
\r session->status = ISSL_HANDSHAKING_WRITE;
\r MakePollWrite(session);
\r }
\r }
\r else
\r {
\r // Handshake failed.
\r CloseSession(session);
\r session->status = ISSL_CLOSING;
\r }
\r\r return false;
\r }
\r else
\r {
\r // Handshake complete.
\r // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
\r userrec* extendme = ServerInstance->FindDescriptor(session->fd);
\r if (extendme)
\r {
\r if (!extendme->GetExt("ssl", dummy))
\r extendme->Extend("ssl", "ON");
\r }
\r\r // Change the seesion state
\r session->status = ISSL_HANDSHAKEN;
\r\r // Finish writing, if any left
\r MakePollWrite(session);
\r\r return true;
\r }
\r }
\r\r virtual void OnPostConnect(userrec* user)
\r {
\r // This occurs AFTER OnUserConnect so we can be sure the
\r // protocol module has propogated the NICK message.
\r if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
\r {
\r // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
\r std::deque<std::string>* metadata = new std::deque<std::string>;
\r metadata->push_back(user->nick);
\r metadata->push_back("ssl"); // The metadata id
\r metadata->push_back("ON"); // The value to send
\r Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
\r event->Send(ServerInstance); // Trigger the event. We don't care what module picks it up.
\r DELETE(event);
\r DELETE(metadata);
\r\r VerifyCertificate(&sessions[user->GetFd()],user);
\r if (sessions[user->GetFd()].sess)
\r {
\r std::string cipher = gnutls_kx_get_name(gnutls_kx_get(sessions[user->GetFd()].sess));
\r cipher.append("-").append(gnutls_cipher_get_name(gnutls_cipher_get(sessions[user->GetFd()].sess))).append("-");
\r cipher.append(gnutls_mac_get_name(gnutls_mac_get(sessions[user->GetFd()].sess)));
\r user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick, cipher.c_str());
\r }
\r }
\r }
\r\r void MakePollWrite(issl_session* session)
\r {
\r OnRawSocketWrite(session->fd, NULL, 0);
\r }
\r\r void CloseSession(issl_session* session)
\r {
\r if(session->sess)
\r {
\r gnutls_bye(session->sess, GNUTLS_SHUT_WR);
\r gnutls_deinit(session->sess);
\r }
\r\r if(session->inbuf)
\r {
\r delete[] session->inbuf;
\r }
\r\r session->outbuf.clear();
\r session->inbuf = NULL;
\r session->sess = NULL;
\r session->status = ISSL_NONE;
\r }
\r\r void VerifyCertificate(issl_session* session, Extensible* user)
\r {
\r if (!session->sess || !user)
\r return;
\r\r unsigned int status;
\r const gnutls_datum_t* cert_list;
\r int ret;
\r unsigned int cert_list_size;
\r gnutls_x509_crt_t cert;
\r char name[MAXBUF];
\r unsigned char digest[MAXBUF];
\r size_t digest_size = sizeof(digest);
\r size_t name_size = sizeof(name);
\r ssl_cert* certinfo = new ssl_cert;
\r\r user->Extend("ssl_cert",certinfo);
\r\r /* This verification function uses the trusted CAs in the credentials
\r * structure. So you must have installed one or more CA certificates.
\r */
\r ret = gnutls_certificate_verify_peers2(session->sess, &status);
\r\r if (ret < 0)
\r {
\r certinfo->data.insert(std::make_pair("error",std::string(gnutls_strerror(ret))));
\r return;
\r }
\r\r if (status & GNUTLS_CERT_INVALID)
\r {
\r certinfo->data.insert(std::make_pair("invalid",ConvToStr(1)));
\r }
\r else
\r {
\r certinfo->data.insert(std::make_pair("invalid",ConvToStr(0)));
\r }
\r if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
\r {
\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
\r }
\r else
\r {
\r certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
\r }
\r if (status & GNUTLS_CERT_REVOKED)
\r {
\r certinfo->data.insert(std::make_pair("revoked",ConvToStr(1)));
\r }
\r else
\r {
\r certinfo->data.insert(std::make_pair("revoked",ConvToStr(0)));
\r }
\r if (status & GNUTLS_CERT_SIGNER_NOT_CA)
\r {
\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
\r }
\r else
\r {
\r certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
\r }
\r\r /* Up to here the process is the same for X.509 certificates and
\r * OpenPGP keys. From now on X.509 certificates are assumed. This can
\r * be easily extended to work with openpgp keys as well.
\r */
\r if (gnutls_certificate_type_get(session->sess) != GNUTLS_CRT_X509)
\r {
\r certinfo->data.insert(std::make_pair("error","No X509 keys sent"));
\r return;
\r }
\r\r ret = gnutls_x509_crt_init(&cert);
\r if (ret < 0)
\r {
\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));
\r return;
\r }
\r\r cert_list_size = 0;
\r cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
\r if (cert_list == NULL)
\r {
\r certinfo->data.insert(std::make_pair("error","No certificate was found"));
\r return;
\r }
\r\r /* This is not a real world example, since we only check the first
\r * certificate in the given chain.
\r */
\r\r ret = gnutls_x509_crt_import(cert, &cert_list[0], GNUTLS_X509_FMT_DER);
\r if (ret < 0)
\r {
\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));
\r return;
\r }
\r\r gnutls_x509_crt_get_dn(cert, name, &name_size);
\r\r certinfo->data.insert(std::make_pair("dn",name));
\r\r gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
\r\r certinfo->data.insert(std::make_pair("issuer",name));
\r\r if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0)
\r {
\r certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));
\r }
\r else
\r {
\r certinfo->data.insert(std::make_pair("fingerprint",irc::hex(digest, digest_size)));
\r }
\r\r /* Beware here we do not check for errors.
\r */
\r if ((gnutls_x509_crt_get_expiration_time(cert) < time(0)) || (gnutls_x509_crt_get_activation_time(cert) > time(0)))
\r {
\r certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
\r }
\r\r gnutls_x509_crt_deinit(cert);
\r\r return;
\r }
\r\r};
\r\rMODULE_INIT(ModuleSSLGnuTLS);
\r\r
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