diff options
author | peavey <peavey@e03df62e-2008-0410-955e-edbf42e46eb7> | 2007-07-16 17:14:45 +0000 |
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committer | peavey <peavey@e03df62e-2008-0410-955e-edbf42e46eb7> | 2007-07-16 17:14:45 +0000 |
commit | bab14f0dd2345c9d7dcbc47c918563709e1ac094 (patch) | |
tree | 753a23cfc9fc08c6697e80b3e686f074aa911d85 /src/modules/extra/m_ssl_gnutls.cpp | |
parent | 3abff3a37550cc1d88dd4d1fd7ed526e89309a53 (diff) |
'svn propset -R svn:eol-style CR *' Set to UNIX-style always. Binaries are auto skipped by svn.
git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7454 e03df62e-2008-0410-955e-edbf42e46eb7
Diffstat (limited to 'src/modules/extra/m_ssl_gnutls.cpp')
-rw-r--r-- | src/modules/extra/m_ssl_gnutls.cpp | 844 |
1 files changed, 1 insertions, 843 deletions
diff --git a/src/modules/extra/m_ssl_gnutls.cpp b/src/modules/extra/m_ssl_gnutls.cpp index fd8b12d32..037d2cf72 100644 --- a/src/modules/extra/m_ssl_gnutls.cpp +++ b/src/modules/extra/m_ssl_gnutls.cpp @@ -1,843 +1 @@ -/* +------------------------------------+ - * | Inspire Internet Relay Chat Daemon | - * +------------------------------------+ - * - * InspIRCd: (C) 2002-2007 InspIRCd Development Team - * See: http://www.inspircd.org/wiki/index.php/Credits - * - * This program is free but copyrighted software; see - * the file COPYING for details. - * - * --------------------------------------------------- - */ - -#include "inspircd.h" - -#include <gnutls/gnutls.h> -#include <gnutls/x509.h> - -#include "inspircd_config.h" -#include "configreader.h" -#include "users.h" -#include "channels.h" -#include "modules.h" -#include "socket.h" -#include "hashcomp.h" -#include "transport.h" - -#ifdef WINDOWS -#pragma comment(lib, "libgnutls-13.lib") -#undef MAX_DESCRIPTORS -#define MAX_DESCRIPTORS 10000 -#endif - -/* $ModDesc: Provides SSL support for clients */ -/* $CompileFlags: exec("libgnutls-config --cflags") */ -/* $LinkerFlags: rpath("libgnutls-config --libs") exec("libgnutls-config --libs") */ -/* $ModDep: transport.h */ - - -enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED }; - -bool isin(int port, const std::vector<int> &portlist) -{ - for(unsigned int i = 0; i < portlist.size(); i++) - if(portlist[i] == port) - return true; - - return false; -} - -/** Represents an SSL user's extra data - */ -class issl_session : public classbase -{ -public: - gnutls_session_t sess; - issl_status status; - std::string outbuf; - int inbufoffset; - char* inbuf; - int fd; -}; - -class ModuleSSLGnuTLS : public Module -{ - - ConfigReader* Conf; - - char* dummy; - - std::vector<int> listenports; - - int inbufsize; - issl_session sessions[MAX_DESCRIPTORS]; - - 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; - - public: - - ModuleSSLGnuTLS(InspIRCd* Me) - : Module(Me) - { - ServerInstance->PublishInterface("InspSocketHook", this); - - // Not rehashable...because I cba to reduce all the sizes of existing buffers. - inbufsize = ServerInstance->Config->NetBufferSize; - - gnutls_global_init(); // This must be called once in the program - - if(gnutls_certificate_allocate_credentials(&x509_cred) != 0) - ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to allocate certificate credentials"); - - // Guessing return meaning - if(gnutls_dh_params_init(&dh_params) < 0) - ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters"); - - // Needs the flag as it ignores a plain /rehash - OnRehash(NULL,"ssl"); - - // Void return, guess we assume success - gnutls_certificate_set_dh_params(x509_cred, dh_params); - } - - virtual void OnRehash(userrec* user, const std::string ¶m) - { - if(param != "ssl") - return; - - Conf = new ConfigReader(ServerInstance); - - for(unsigned int i = 0; i < listenports.size(); i++) - { - ServerInstance->Config->DelIOHook(listenports[i]); - } - - listenports.clear(); - clientactive = 0; - sslports.clear(); - - for(int i = 0; i < Conf->Enumerate("bind"); i++) - { - // For each <bind> tag - std::string x = Conf->ReadValue("bind", "type", i); - if(((x.empty()) || (x == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "gnutls")) - { - // Get the port we're meant to be listening on with SSL - std::string port = Conf->ReadValue("bind", "port", i); - irc::portparser portrange(port, false); - long portno = -1; - while ((portno = portrange.GetToken())) - { - clientactive++; - try - { - if (ServerInstance->Config->AddIOHook(portno, this)) - { - listenports.push_back(portno); - for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++) - if (ServerInstance->Config->ports[i]->GetPort() == portno) - ServerInstance->Config->ports[i]->SetDescription("ssl"); - ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %d", portno); - sslports.append("*:").append(ConvToStr(portno)).append(";"); - } - else - { - ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno); - } - } - catch (ModuleException &e) - { - 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()); - } - } - } - } - - 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] != '/') - cafile = confdir + cafile; - - if(crlfile[0] != '/') - crlfile = confdir + crlfile; - - if(certfile[0] != '/') - certfile = confdir + certfile; - - if(keyfile[0] != '/') - keyfile = confdir + keyfile; - - int ret; - - if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0) - ServerInstance->Log(DEFAULT, "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->Log(DEFAULT, "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) - { - // 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: " + std::string(gnutls_strerror(ret))); - } - - // This may be on a large (once a day or week) timer eventually. - GenerateDHParams(); - - DELETE(Conf); - } - - 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->Log(DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret)); - } - - virtual ~ModuleSSLGnuTLS() - { - gnutls_dh_params_deinit(dh_params); - gnutls_certificate_free_credentials(x509_cred); - gnutls_global_deinit(); - } - - virtual void OnCleanup(int target_type, void* item) - { - if(target_type == TYPE_USER) - { - userrec* user = (userrec*)item; - - if(user->GetExt("ssl", dummy) && isin(user->GetPort(), listenports)) - { - // 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->GlobalCulls.AddItem(user, "SSL module unloading"); - } - if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports)) - { - 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++) - { - ServerInstance->Config->DelIOHook(listenports[i]); - for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++) - if (ServerInstance->Config->ports[j]->GetPort() == listenports[i]) - ServerInstance->Config->ports[j]->SetDescription("plaintext"); - } - } - } - - virtual Version GetVersion() - { - return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION); - } - - void Implements(char* List) - { - List[I_On005Numeric] = List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1; - List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1; - } - - virtual void On005Numeric(std::string &output) - { - output.append(" SSL=" + sslports); - } - - virtual 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) - { - char* ret = "OK"; - try - { - ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL; - } - catch (ModuleException &e) - { - return NULL; - } - return ret; - } - else if (strcmp("IS_UNHOOK", request->GetId()) == 0) - { - return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL; - } - else if (strcmp("IS_HSDONE", request->GetId()) == 0) - { - if (ISR->Sock->GetFd() < 0) - return (char*)"OK"; - - issl_session* session = &sessions[ISR->Sock->GetFd()]; - return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : (char*)"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->FindDescriptor(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock)) - { - VerifyCertificate(session, (InspSocket*)ISR->Sock); - return "OK"; - } - } - } - } - return NULL; - } - - - virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport) - { - issl_session* session = &sessions[fd]; - - session->fd = fd; - session->inbuf = new char[inbufsize]; - session->inbufoffset = 0; - - 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); - - /* This is an experimental change to avoid a warning on 64bit systems about casting between integer and pointer of different sizes - * This needs testing, but it's easy enough to rollback if need be - * Old: gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket. - * New: gnutls_transport_set_ptr(session->sess, &fd); // Give gnutls the fd for the socket. - * - * With testing this seems to...not work :/ - */ - - 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); - } - - virtual void OnRawSocketConnect(int fd) - { - issl_session* session = &sessions[fd]; - - session->fd = fd; - session->inbuf = new char[inbufsize]; - session->inbufoffset = 0; - - 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); - } - - virtual void OnRawSocketClose(int fd) - { - CloseSession(&sessions[fd]); - - EventHandler* user = ServerInstance->SE->GetRef(fd); - - if ((user) && (user->GetExt("ssl_cert", dummy))) - { - 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) - { - 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)) - { - // Couldn't resume handshake. - return -1; - } - } - else if (session->status == ISSL_HANDSHAKING_WRITE) - { - errno = EAGAIN; - return -1; - } - - // If we resumed the handshake then session->status will be ISSL_HANDSHAKEN. - - if (session->status == ISSL_HANDSHAKEN) - { - // 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. - int ret = gnutls_record_recv(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset); - - if (ret == 0) - { - // Client closed connection. - readresult = 0; - CloseSession(session); - return 1; - } - else if (ret < 0) - { - if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED) - { - errno = EAGAIN; - return -1; - } - else - { - readresult = 0; - CloseSession(session); - } - } - else - { - // Read successfully 'ret' bytes into inbuf + inbufoffset - // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf' - // 'buffer' is 'count' long - - unsigned int length = ret + session->inbufoffset; - - if(count <= length) - { - memcpy(buffer, session->inbuf, count); - // Move the stuff left in inbuf to the beginning of it - memcpy(session->inbuf, session->inbuf + count, (length - count)); - // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp. - session->inbufoffset = length - 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, length); - // Zero the offset, as there's nothing there.. - session->inbufoffset = 0; - // As above - readresult = length; - } - } - } - else if(session->status == ISSL_CLOSING) - readresult = 0; - - return 1; - } - - virtual int OnRawSocketWrite(int fd, const char* buffer, int count) - { - if (!count) - return 0; - - issl_session* session = &sessions[fd]; - const char* sendbuffer = buffer; - - if (!session->sess) - { - ServerInstance->Log(DEBUG,"No session"); - CloseSession(session); - return 1; - } - - session->outbuf.append(sendbuffer, count); - sendbuffer = session->outbuf.c_str(); - count = session->outbuf.size(); - - if (session->status == ISSL_HANDSHAKING_WRITE) - { - // The handshake isn't finished, try to finish it. - ServerInstance->Log(DEBUG,"Finishing handshake"); - Handshake(session); - errno = EAGAIN; - return -1; - } - - int ret = 0; - - if (session->status == ISSL_HANDSHAKEN) - { - ServerInstance->Log(DEBUG,"Send record"); - ret = gnutls_record_send(session->sess, sendbuffer, count); - ServerInstance->Log(DEBUG,"Return: %d", ret); - - if (ret == 0) - { - CloseSession(session); - } - else if (ret < 0) - { - if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED) - { - ServerInstance->Log(DEBUG,"Not egain or interrupt, close session"); - CloseSession(session); - } - else - { - ServerInstance->Log(DEBUG,"Again please"); - errno = EAGAIN; - return -1; - } - } - else - { - ServerInstance->Log(DEBUG,"Trim buffer"); - session->outbuf = session->outbuf.substr(ret); - } - } - - /* Who's smart idea was it to return 1 when we havent written anything? - * This fucks the buffer up in InspSocket :p - */ - return ret < 1 ? 0 : ret; - } - - // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection - virtual void OnWhois(userrec* source, userrec* dest) - { - if (!clientactive) - return; - - // Bugfix, only send this numeric for *our* SSL users - if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) && isin(dest->GetPort(), listenports))) - { - ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick); - } - } - - virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname, bool displayable) - { - // check if the linking module wants to know about OUR metadata - if(extname == "ssl") - { - // check if this user has an swhois field to send - if(user->GetExt(extname, dummy)) - { - // call this function in the linking module, let it format the data how it - // sees fit, and send it on its way. We dont need or want to know how. - proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON"); - } - } - } - - virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata) - { - // check if its our metadata key, and its associated with a user - if ((target_type == TYPE_USER) && (extname == "ssl")) - { - userrec* dest = (userrec*)target; - // if they dont already have an ssl flag, accept the remote server's - if (!dest->GetExt(extname, dummy)) - { - dest->Extend(extname, "ON"); - } - } - } - - bool Handshake(issl_session* session) - { - 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(session); - } - } - else - { - // Handshake failed. - 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. - userrec* extendme = ServerInstance->FindDescriptor(session->fd); - if (extendme) - { - if (!extendme->GetExt("ssl", dummy)) - extendme->Extend("ssl", "ON"); - } - - // Change the seesion state - session->status = ISSL_HANDSHAKEN; - - // Finish writing, if any left - MakePollWrite(session); - - return true; - } - } - - virtual void OnPostConnect(userrec* user) - { - // This occurs AFTER OnUserConnect so we can be sure the - // protocol module has propogated the NICK message. - if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user))) - { - // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW. - std::deque<std::string>* metadata = new std::deque<std::string>; - metadata->push_back(user->nick); - metadata->push_back("ssl"); // The metadata id - metadata->push_back("ON"); // The value to send - Event* event = new Event((char*)metadata,(Module*)this,"send_metadata"); - event->Send(ServerInstance); // Trigger the event. We don't care what module picks it up. - DELETE(event); - DELETE(metadata); - - 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, cipher.c_str()); - } - } - } - - void MakePollWrite(issl_session* session) - { - OnRawSocketWrite(session->fd, NULL, 0); - } - - void CloseSession(issl_session* session) - { - if(session->sess) - { - gnutls_bye(session->sess, GNUTLS_SHUT_WR); - gnutls_deinit(session->sess); - } - - if(session->inbuf) - { - delete[] session->inbuf; - } - - session->outbuf.clear(); - session->inbuf = NULL; - session->sess = NULL; - session->status = ISSL_NONE; - } - - void VerifyCertificate(issl_session* session, Extensible* user) - { - if (!session->sess || !user) - return; - - 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->data.insert(std::make_pair("error",std::string(gnutls_strerror(ret)))); - return; - } - - if (status & GNUTLS_CERT_INVALID) - { - certinfo->data.insert(std::make_pair("invalid",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("invalid",ConvToStr(0))); - } - if (status & GNUTLS_CERT_SIGNER_NOT_FOUND) - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0))); - } - if (status & GNUTLS_CERT_REVOKED) - { - certinfo->data.insert(std::make_pair("revoked",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("revoked",ConvToStr(0))); - } - if (status & GNUTLS_CERT_SIGNER_NOT_CA) - { - certinfo->data.insert(std::make_pair("trusted",ConvToStr(0))); - } - else - { - certinfo->data.insert(std::make_pair("trusted",ConvToStr(1))); - } - - /* 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->data.insert(std::make_pair("error","No X509 keys sent")); - return; - } - - ret = gnutls_x509_crt_init(&cert); - if (ret < 0) - { - certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret))); - return; - } - - cert_list_size = 0; - cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size); - if (cert_list == NULL) - { - certinfo->data.insert(std::make_pair("error","No certificate was found")); - return; - } - - /* 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->data.insert(std::make_pair("error",gnutls_strerror(ret))); - return; - } - - gnutls_x509_crt_get_dn(cert, name, &name_size); - - certinfo->data.insert(std::make_pair("dn",name)); - - gnutls_x509_crt_get_issuer_dn(cert, name, &name_size); - - certinfo->data.insert(std::make_pair("issuer",name)); - - if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0) - { - certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret))); - } - else - { - certinfo->data.insert(std::make_pair("fingerprint",irc::hex(digest, digest_size))); - } - - /* Beware here we do not check for errors. - */ - if ((gnutls_x509_crt_get_expiration_time(cert) < time(0)) || (gnutls_x509_crt_get_activation_time(cert) > time(0))) - { - certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate")); - } - - gnutls_x509_crt_deinit(cert); - - return; - } - -}; - -MODULE_INIT(ModuleSSLGnuTLS); - +/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include <gnutls/gnutls.h>
#include <gnutls/x509.h>
#include "inspircd_config.h"
#include "configreader.h"
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "socket.h"
#include "hashcomp.h"
#include "transport.h"
#ifdef WINDOWS
#pragma comment(lib, "libgnutls-13.lib")
#undef MAX_DESCRIPTORS
#define MAX_DESCRIPTORS 10000
#endif
/* $ModDesc: Provides SSL support for clients */
/* $CompileFlags: exec("libgnutls-config --cflags") */
/* $LinkerFlags: rpath("libgnutls-config --libs") exec("libgnutls-config --libs") */
/* $ModDep: transport.h */
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING_READ, ISSL_HANDSHAKING_WRITE, ISSL_HANDSHAKEN, ISSL_CLOSING, ISSL_CLOSED };
bool isin(int port, const std::vector<int> &portlist)
{
for(unsigned int i = 0; i < portlist.size(); i++)
if(portlist[i] == port)
return true;
return false;
}
/** Represents an SSL user's extra data
*/
class issl_session : public classbase
{
public:
gnutls_session_t sess;
issl_status status;
std::string outbuf;
int inbufoffset;
char* inbuf;
int fd;
};
class ModuleSSLGnuTLS : public Module
{
ConfigReader* Conf;
char* dummy;
std::vector<int> listenports;
int inbufsize;
issl_session sessions[MAX_DESCRIPTORS];
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;
public:
ModuleSSLGnuTLS(InspIRCd* Me)
: Module(Me)
{
ServerInstance->PublishInterface("InspSocketHook", this);
// Not rehashable...because I cba to reduce all the sizes of existing buffers.
inbufsize = ServerInstance->Config->NetBufferSize;
gnutls_global_init(); // This must be called once in the program
if(gnutls_certificate_allocate_credentials(&x509_cred) != 0)
ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to allocate certificate credentials");
// Guessing return meaning
if(gnutls_dh_params_init(&dh_params) < 0)
ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Failed to initialise DH parameters");
// Needs the flag as it ignores a plain /rehash
OnRehash(NULL,"ssl");
// Void return, guess we assume success
gnutls_certificate_set_dh_params(x509_cred, dh_params);
}
virtual void OnRehash(userrec* user, const std::string ¶m)
{
if(param != "ssl")
return;
Conf = new ConfigReader(ServerInstance);
for(unsigned int i = 0; i < listenports.size(); i++)
{
ServerInstance->Config->DelIOHook(listenports[i]);
}
listenports.clear();
clientactive = 0;
sslports.clear();
for(int i = 0; i < Conf->Enumerate("bind"); i++)
{
// For each <bind> tag
std::string x = Conf->ReadValue("bind", "type", i);
if(((x.empty()) || (x == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "gnutls"))
{
// Get the port we're meant to be listening on with SSL
std::string port = Conf->ReadValue("bind", "port", i);
irc::portparser portrange(port, false);
long portno = -1;
while ((portno = portrange.GetToken()))
{
clientactive++;
try
{
if (ServerInstance->Config->AddIOHook(portno, this))
{
listenports.push_back(portno);
for (size_t i = 0; i < ServerInstance->Config->ports.size(); i++)
if (ServerInstance->Config->ports[i]->GetPort() == portno)
ServerInstance->Config->ports[i]->SetDescription("ssl");
ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: Enabling SSL for port %d", portno);
sslports.append("*:").append(ConvToStr(portno)).append(";");
}
else
{
ServerInstance->Log(DEFAULT, "m_ssl_gnutls.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
}
}
catch (ModuleException &e)
{
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());
}
}
}
}
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] != '/')
cafile = confdir + cafile;
if(crlfile[0] != '/')
crlfile = confdir + crlfile;
if(certfile[0] != '/')
certfile = confdir + certfile;
if(keyfile[0] != '/')
keyfile = confdir + keyfile;
int ret;
if((ret =gnutls_certificate_set_x509_trust_file(x509_cred, cafile.c_str(), GNUTLS_X509_FMT_PEM)) < 0)
ServerInstance->Log(DEFAULT, "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->Log(DEFAULT, "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)
{
// 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: " + std::string(gnutls_strerror(ret)));
}
// This may be on a large (once a day or week) timer eventually.
GenerateDHParams();
DELETE(Conf);
}
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->Log(DEFAULT, "m_ssl_gnutls.so: Failed to generate DH parameters (%d bits): %s", dh_bits, gnutls_strerror(ret));
}
virtual ~ModuleSSLGnuTLS()
{
gnutls_dh_params_deinit(dh_params);
gnutls_certificate_free_credentials(x509_cred);
gnutls_global_deinit();
}
virtual void OnCleanup(int target_type, void* item)
{
if(target_type == TYPE_USER)
{
userrec* user = (userrec*)item;
if(user->GetExt("ssl", dummy) && isin(user->GetPort(), listenports))
{
// 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->GlobalCulls.AddItem(user, "SSL module unloading");
}
if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
{
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++)
{
ServerInstance->Config->DelIOHook(listenports[i]);
for (size_t j = 0; j < ServerInstance->Config->ports.size(); j++)
if (ServerInstance->Config->ports[j]->GetPort() == listenports[i])
ServerInstance->Config->ports[j]->SetDescription("plaintext");
}
}
}
virtual Version GetVersion()
{
return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
}
void Implements(char* List)
{
List[I_On005Numeric] = List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
}
virtual void On005Numeric(std::string &output)
{
output.append(" SSL=" + sslports);
}
virtual 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)
{
char* ret = "OK";
try
{
ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
}
catch (ModuleException &e)
{
return NULL;
}
return ret;
}
else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
{
return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
}
else if (strcmp("IS_HSDONE", request->GetId()) == 0)
{
if (ISR->Sock->GetFd() < 0)
return (char*)"OK";
issl_session* session = &sessions[ISR->Sock->GetFd()];
return (session->status == ISSL_HANDSHAKING_READ || session->status == ISSL_HANDSHAKING_WRITE) ? NULL : (char*)"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->FindDescriptor(ISR->Sock->GetFd()) == (Extensible*)(ISR->Sock))
{
VerifyCertificate(session, (InspSocket*)ISR->Sock);
return "OK";
}
}
}
}
return NULL;
}
virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
{
issl_session* session = &sessions[fd];
session->fd = fd;
session->inbuf = new char[inbufsize];
session->inbufoffset = 0;
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);
/* This is an experimental change to avoid a warning on 64bit systems about casting between integer and pointer of different sizes
* This needs testing, but it's easy enough to rollback if need be
* Old: gnutls_transport_set_ptr(session->sess, (gnutls_transport_ptr_t) fd); // Give gnutls the fd for the socket.
* New: gnutls_transport_set_ptr(session->sess, &fd); // Give gnutls the fd for the socket.
*
* With testing this seems to...not work :/
*/
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);
}
virtual void OnRawSocketConnect(int fd)
{
issl_session* session = &sessions[fd];
session->fd = fd;
session->inbuf = new char[inbufsize];
session->inbufoffset = 0;
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);
}
virtual void OnRawSocketClose(int fd)
{
CloseSession(&sessions[fd]);
EventHandler* user = ServerInstance->SE->GetRef(fd);
if ((user) && (user->GetExt("ssl_cert", dummy)))
{
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)
{
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))
{
// Couldn't resume handshake.
return -1;
}
}
else if (session->status == ISSL_HANDSHAKING_WRITE)
{
errno = EAGAIN;
return -1;
}
// If we resumed the handshake then session->status will be ISSL_HANDSHAKEN.
if (session->status == ISSL_HANDSHAKEN)
{
// 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.
int ret = gnutls_record_recv(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
if (ret == 0)
{
// Client closed connection.
readresult = 0;
CloseSession(session);
return 1;
}
else if (ret < 0)
{
if (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED)
{
errno = EAGAIN;
return -1;
}
else
{
readresult = 0;
CloseSession(session);
}
}
else
{
// Read successfully 'ret' bytes into inbuf + inbufoffset
// There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
// 'buffer' is 'count' long
unsigned int length = ret + session->inbufoffset;
if(count <= length)
{
memcpy(buffer, session->inbuf, count);
// Move the stuff left in inbuf to the beginning of it
memcpy(session->inbuf, session->inbuf + count, (length - count));
// Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
session->inbufoffset = length - 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, length);
// Zero the offset, as there's nothing there..
session->inbufoffset = 0;
// As above
readresult = length;
}
}
}
else if(session->status == ISSL_CLOSING)
readresult = 0;
return 1;
}
virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
{
if (!count)
return 0;
issl_session* session = &sessions[fd];
const char* sendbuffer = buffer;
if (!session->sess)
{
ServerInstance->Log(DEBUG,"No session");
CloseSession(session);
return 1;
}
session->outbuf.append(sendbuffer, count);
sendbuffer = session->outbuf.c_str();
count = session->outbuf.size();
if (session->status == ISSL_HANDSHAKING_WRITE)
{
// The handshake isn't finished, try to finish it.
ServerInstance->Log(DEBUG,"Finishing handshake");
Handshake(session);
errno = EAGAIN;
return -1;
}
int ret = 0;
if (session->status == ISSL_HANDSHAKEN)
{
ServerInstance->Log(DEBUG,"Send record");
ret = gnutls_record_send(session->sess, sendbuffer, count);
ServerInstance->Log(DEBUG,"Return: %d", ret);
if (ret == 0)
{
CloseSession(session);
}
else if (ret < 0)
{
if(ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)
{
ServerInstance->Log(DEBUG,"Not egain or interrupt, close session");
CloseSession(session);
}
else
{
ServerInstance->Log(DEBUG,"Again please");
errno = EAGAIN;
return -1;
}
}
else
{
ServerInstance->Log(DEBUG,"Trim buffer");
session->outbuf = session->outbuf.substr(ret);
}
}
/* Who's smart idea was it to return 1 when we havent written anything?
* This fucks the buffer up in InspSocket :p
*/
return ret < 1 ? 0 : ret;
}
// :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
virtual void OnWhois(userrec* source, userrec* dest)
{
if (!clientactive)
return;
// Bugfix, only send this numeric for *our* SSL users
if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) && isin(dest->GetPort(), listenports)))
{
ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
}
}
virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname, bool displayable)
{
// check if the linking module wants to know about OUR metadata
if(extname == "ssl")
{
// check if this user has an swhois field to send
if(user->GetExt(extname, dummy))
{
// call this function in the linking module, let it format the data how it
// sees fit, and send it on its way. We dont need or want to know how.
proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON");
}
}
}
virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
{
// check if its our metadata key, and its associated with a user
if ((target_type == TYPE_USER) && (extname == "ssl"))
{
userrec* dest = (userrec*)target;
// if they dont already have an ssl flag, accept the remote server's
if (!dest->GetExt(extname, dummy))
{
dest->Extend(extname, "ON");
}
}
}
bool Handshake(issl_session* session)
{
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(session);
}
}
else
{
// Handshake failed.
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.
userrec* extendme = ServerInstance->FindDescriptor(session->fd);
if (extendme)
{
if (!extendme->GetExt("ssl", dummy))
extendme->Extend("ssl", "ON");
}
// Change the seesion state
session->status = ISSL_HANDSHAKEN;
// Finish writing, if any left
MakePollWrite(session);
return true;
}
}
virtual void OnPostConnect(userrec* user)
{
// This occurs AFTER OnUserConnect so we can be sure the
// protocol module has propogated the NICK message.
if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
{
// Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
std::deque<std::string>* metadata = new std::deque<std::string>;
metadata->push_back(user->nick);
metadata->push_back("ssl"); // The metadata id
metadata->push_back("ON"); // The value to send
Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
event->Send(ServerInstance); // Trigger the event. We don't care what module picks it up.
DELETE(event);
DELETE(metadata);
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, cipher.c_str());
}
}
}
void MakePollWrite(issl_session* session)
{
OnRawSocketWrite(session->fd, NULL, 0);
}
void CloseSession(issl_session* session)
{
if(session->sess)
{
gnutls_bye(session->sess, GNUTLS_SHUT_WR);
gnutls_deinit(session->sess);
}
if(session->inbuf)
{
delete[] session->inbuf;
}
session->outbuf.clear();
session->inbuf = NULL;
session->sess = NULL;
session->status = ISSL_NONE;
}
void VerifyCertificate(issl_session* session, Extensible* user)
{
if (!session->sess || !user)
return;
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->data.insert(std::make_pair("error",std::string(gnutls_strerror(ret))));
return;
}
if (status & GNUTLS_CERT_INVALID)
{
certinfo->data.insert(std::make_pair("invalid",ConvToStr(1)));
}
else
{
certinfo->data.insert(std::make_pair("invalid",ConvToStr(0)));
}
if (status & GNUTLS_CERT_SIGNER_NOT_FOUND)
{
certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
}
else
{
certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
}
if (status & GNUTLS_CERT_REVOKED)
{
certinfo->data.insert(std::make_pair("revoked",ConvToStr(1)));
}
else
{
certinfo->data.insert(std::make_pair("revoked",ConvToStr(0)));
}
if (status & GNUTLS_CERT_SIGNER_NOT_CA)
{
certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
}
else
{
certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
}
/* 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->data.insert(std::make_pair("error","No X509 keys sent"));
return;
}
ret = gnutls_x509_crt_init(&cert);
if (ret < 0)
{
certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));
return;
}
cert_list_size = 0;
cert_list = gnutls_certificate_get_peers(session->sess, &cert_list_size);
if (cert_list == NULL)
{
certinfo->data.insert(std::make_pair("error","No certificate was found"));
return;
}
/* 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->data.insert(std::make_pair("error",gnutls_strerror(ret)));
return;
}
gnutls_x509_crt_get_dn(cert, name, &name_size);
certinfo->data.insert(std::make_pair("dn",name));
gnutls_x509_crt_get_issuer_dn(cert, name, &name_size);
certinfo->data.insert(std::make_pair("issuer",name));
if ((ret = gnutls_x509_crt_get_fingerprint(cert, GNUTLS_DIG_MD5, digest, &digest_size)) < 0)
{
certinfo->data.insert(std::make_pair("error",gnutls_strerror(ret)));
}
else
{
certinfo->data.insert(std::make_pair("fingerprint",irc::hex(digest, digest_size)));
}
/* Beware here we do not check for errors.
*/
if ((gnutls_x509_crt_get_expiration_time(cert) < time(0)) || (gnutls_x509_crt_get_activation_time(cert) > time(0)))
{
certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
}
gnutls_x509_crt_deinit(cert);
return;
}
};
MODULE_INIT(ModuleSSLGnuTLS);
\ No newline at end of file |