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_openssl.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_openssl.cpp')
-rw-r--r-- | src/modules/extra/m_ssl_openssl.cpp | 902 |
1 files changed, 1 insertions, 901 deletions
diff --git a/src/modules/extra/m_ssl_openssl.cpp b/src/modules/extra/m_ssl_openssl.cpp index ffd9d4032..43dc43aea 100644 --- a/src/modules/extra/m_ssl_openssl.cpp +++ b/src/modules/extra/m_ssl_openssl.cpp @@ -1,901 +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 <openssl/ssl.h> -#include <openssl/err.h> - -#ifdef WINDOWS -#include <openssl/applink.c> -#endif - -#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, "libeay32MTd") -#pragma comment(lib, "ssleay32MTd") -#undef MAX_DESCRIPTORS -#define MAX_DESCRIPTORS 10000 -#endif - -/* $ModDesc: Provides SSL support for clients */ -/* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */ -/* $LinkerFlags: rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */ -/* $ModDep: transport.h */ - -enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN }; -enum issl_io_status { ISSL_WRITE, ISSL_READ }; - -static bool SelfSigned = false; - -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; -} - -char* get_error() -{ - return ERR_error_string(ERR_get_error(), NULL); -} - -static int error_callback(const char *str, size_t len, void *u); - -/** Represents an SSL user's extra data - */ -class issl_session : public classbase -{ -public: - SSL* sess; - issl_status status; - issl_io_status rstat; - issl_io_status wstat; - - unsigned int inbufoffset; - char* inbuf; // Buffer OpenSSL reads into. - std::string outbuf; // Buffer for outgoing data that OpenSSL will not take. - int fd; - bool outbound; - - issl_session() - { - outbound = false; - rstat = ISSL_READ; - wstat = ISSL_WRITE; - } -}; - -static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx) -{ - /* XXX: This will allow self signed certificates. - * In the future if we want an option to not allow this, - * we can just return preverify_ok here, and openssl - * will boot off self-signed and invalid peer certs. - */ - int ve = X509_STORE_CTX_get_error(ctx); - - SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT); - - return 1; -} - -class ModuleSSLOpenSSL : public Module -{ - - ConfigReader* Conf; - - std::vector<int> listenports; - - int inbufsize; - issl_session sessions[MAX_DESCRIPTORS]; - - SSL_CTX* ctx; - SSL_CTX* clictx; - - char* dummy; - char cipher[MAXBUF]; - - std::string keyfile; - std::string certfile; - std::string cafile; - // std::string crlfile; - std::string dhfile; - std::string sslports; - - int clientactive; - - public: - - InspIRCd* PublicInstance; - - ModuleSSLOpenSSL(InspIRCd* Me) - : Module(Me), PublicInstance(Me) - { - ServerInstance->PublishInterface("InspSocketHook", this); - - // Not rehashable...because I cba to reduce all the sizes of existing buffers. - inbufsize = ServerInstance->Config->NetBufferSize; - - /* Global SSL library initialization*/ - SSL_library_init(); - SSL_load_error_strings(); - - /* Build our SSL contexts: - * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK. - */ - ctx = SSL_CTX_new( SSLv23_server_method() ); - clictx = SSL_CTX_new( SSLv23_client_method() ); - - SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify); - SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify); - - // Needs the flag as it ignores a plain /rehash - OnRehash(NULL,"ssl"); - } - - 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) == "openssl")) - { - // 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_openssl.so: Enabling SSL for port %d", portno); - sslports.append("*:").append(ConvToStr(portno)).append(";"); - } - else - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.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_openssl.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 another SSL or similar module loaded?", portno, e.GetReason()); - } - } - } - } - - if (!sslports.empty()) - sslports.erase(sslports.end() - 1); - - 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("openssl", "cafile", 0); - certfile = Conf->ReadValue("openssl", "certfile", 0); - keyfile = Conf->ReadValue("openssl", "keyfile", 0); - dhfile = Conf->ReadValue("openssl", "dhfile", 0); - - // Set all the default values needed. - if (cafile.empty()) - cafile = "ca.pem"; - - if (certfile.empty()) - certfile = "cert.pem"; - - if (keyfile.empty()) - keyfile = "key.pem"; - - if (dhfile.empty()) - dhfile = "dhparams.pem"; - - // Prepend relative paths with the path to the config directory. - if (cafile[0] != '/') - cafile = confdir + cafile; - - if (certfile[0] != '/') - certfile = confdir + certfile; - - if (keyfile[0] != '/') - keyfile = confdir + keyfile; - - if (dhfile[0] != '/') - dhfile = confdir + dhfile; - - /* Load our keys and certificates - * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck. - */ - if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str()))) - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno)); - ERR_print_errors_cb(error_callback, this); - } - - if (((!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))) || (!SSL_CTX_use_PrivateKey_file(clictx, keyfile.c_str(), SSL_FILETYPE_PEM))) - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno)); - ERR_print_errors_cb(error_callback, this); - } - - /* Load the CAs we trust*/ - if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0))) - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno)); - ERR_print_errors_cb(error_callback, this); - } - - FILE* dhpfile = fopen(dhfile.c_str(), "r"); - DH* ret; - - if (dhpfile == NULL) - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno)); - throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno)); - } - else - { - ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL); - if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0)) - { - ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str()); - ERR_print_errors_cb(error_callback, this); - } - } - - fclose(dhpfile); - - DELETE(Conf); - } - - virtual void On005Numeric(std::string &output) - { - output.append(" SSL=" + sslports); - } - - virtual ~ModuleSSLOpenSSL() - { - SSL_CTX_free(ctx); - SSL_CTX_free(clictx); - } - - virtual void OnCleanup(int target_type, void* item) - { - if (target_type == TYPE_USER) - { - userrec* user = (userrec*)item; - - if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && 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_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = List[I_On005Numeric] = 1; - List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1; - } - - virtual char* OnRequest(Request* request) - { - ISHRequest* ISR = (ISHRequest*)request; - if (strcmp("IS_NAME", request->GetId()) == 0) - { - return "openssl"; - } - 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) - { - ServerInstance->Log(DEBUG,"Module checking if handshake is done"); - if (ISR->Sock->GetFd() < 0) - return (char*)"OK"; - - issl_session* session = &sessions[ISR->Sock->GetFd()]; - return (session->status == ISSL_HANDSHAKING) ? NULL : (char*)"OK"; - } - else if (strcmp("IS_ATTACH", request->GetId()) == 0) - { - issl_session* session = &sessions[ISR->Sock->GetFd()]; - if (session->sess) - { - 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; - session->sess = SSL_new(ctx); - session->status = ISSL_NONE; - session->outbound = false; - - if (session->sess == NULL) - return; - - if (SSL_set_fd(session->sess, fd) == 0) - { - ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd); - return; - } - - Handshake(session); - } - - virtual void OnRawSocketConnect(int fd) - { - ServerInstance->Log(DEBUG,"OnRawSocketConnect connecting"); - issl_session* session = &sessions[fd]; - - session->fd = fd; - session->inbuf = new char[inbufsize]; - session->inbufoffset = 0; - session->sess = SSL_new(clictx); - session->status = ISSL_NONE; - session->outbound = true; - - if (session->sess == NULL) - return; - - if (SSL_set_fd(session->sess, fd) == 0) - { - ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd); - return; - } - - Handshake(session); - ServerInstance->Log(DEBUG,"Exiting OnRawSocketConnect"); - } - - 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]; - - ServerInstance->Log(DEBUG,"OnRawSocketRead"); - - if (!session->sess) - { - ServerInstance->Log(DEBUG,"OnRawSocketRead has no session"); - readresult = 0; - CloseSession(session); - return 1; - } - - if (session->status == ISSL_HANDSHAKING) - { - if (session->rstat == ISSL_READ || session->wstat == ISSL_READ) - { - ServerInstance->Log(DEBUG,"Resume handshake in read"); - // The handshake isn't finished and it wants to read, try to finish it. - if (!Handshake(session)) - { - ServerInstance->Log(DEBUG,"Cant resume handshake in read"); - // Couldn't resume handshake. - return -1; - } - } - else - { - errno = EAGAIN; - return -1; - } - } - - // If we resumed the handshake then session->status will be ISSL_OPEN - - if (session->status == ISSL_OPEN) - { - if (session->wstat == ISSL_READ) - { - if(DoWrite(session) == 0) - return 0; - } - - if (session->rstat == ISSL_READ) - { - int ret = DoRead(session); - - if (ret > 0) - { - if (count <= session->inbufoffset) - { - memcpy(buffer, session->inbuf, count); - // Move the stuff left in inbuf to the beginning of it - memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count)); - // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp. - session->inbufoffset -= count; - // Insp uses readresult as the count of how much data there is in buffer, so: - readresult = count; - } - else - { - // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing. - memcpy(buffer, session->inbuf, session->inbufoffset); - - readresult = session->inbufoffset; - // Zero the offset, as there's nothing there.. - session->inbufoffset = 0; - } - - return 1; - } - else - { - return ret; - } - } - } - - return -1; - } - - virtual int OnRawSocketWrite(int fd, const char* buffer, int count) - { - issl_session* session = &sessions[fd]; - - if (!session->sess) - { - ServerInstance->Log(DEBUG,"Close session missing sess"); - CloseSession(session); - return -1; - } - - session->outbuf.append(buffer, count); - - if (session->status == ISSL_HANDSHAKING) - { - // The handshake isn't finished, try to finish it. - if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE) - { - ServerInstance->Log(DEBUG,"Handshake resume"); - Handshake(session); - } - } - - if (session->status == ISSL_OPEN) - { - if (session->rstat == ISSL_WRITE) - { - ServerInstance->Log(DEBUG,"DoRead"); - DoRead(session); - } - - if (session->wstat == ISSL_WRITE) - { - ServerInstance->Log(DEBUG,"DoWrite"); - return DoWrite(session); - } - } - - return 1; - } - - int DoWrite(issl_session* session) - { - if (!session->outbuf.size()) - return -1; - - int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size()); - - if (ret == 0) - { - ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_write"); - CloseSession(session); - return 0; - } - else if (ret < 0) - { - int err = SSL_get_error(session->sess, ret); - - if (err == SSL_ERROR_WANT_WRITE) - { - session->wstat = ISSL_WRITE; - return -1; - } - else if (err == SSL_ERROR_WANT_READ) - { - session->wstat = ISSL_READ; - return -1; - } - else - { - ServerInstance->Log(DEBUG,"Close due to returned -1 in SSL_Write"); - CloseSession(session); - return 0; - } - } - else - { - session->outbuf = session->outbuf.substr(ret); - return ret; - } - } - - int DoRead(issl_session* session) - { - // 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. - - ServerInstance->Log(DEBUG,"DoRead"); - - int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset); - - if (ret == 0) - { - // Client closed connection. - ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_read"); - CloseSession(session); - return 0; - } - else if (ret < 0) - { - int err = SSL_get_error(session->sess, ret); - - if (err == SSL_ERROR_WANT_READ) - { - session->rstat = ISSL_READ; - ServerInstance->Log(DEBUG,"Setting want_read"); - return -1; - } - else if (err == SSL_ERROR_WANT_WRITE) - { - session->rstat = ISSL_WRITE; - ServerInstance->Log(DEBUG,"Setting want_write"); - return -1; - } - else - { - ServerInstance->Log(DEBUG,"Closed due to returned -1 in SSL_Read"); - CloseSession(session); - return 0; - } - } - else - { - // Read successfully 'ret' bytes into inbuf + inbufoffset - // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf' - // 'buffer' is 'count' long - - session->inbufoffset += ret; - - return 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) - { - ServerInstance->Log(DEBUG,"Handshake"); - int ret; - - if (session->outbound) - { - ServerInstance->Log(DEBUG,"SSL_connect"); - ret = SSL_connect(session->sess); - } - else - ret = SSL_accept(session->sess); - - if (ret < 0) - { - int err = SSL_get_error(session->sess, ret); - - if (err == SSL_ERROR_WANT_READ) - { - ServerInstance->Log(DEBUG,"Want read, handshaking"); - session->rstat = ISSL_READ; - session->status = ISSL_HANDSHAKING; - return true; - } - else if (err == SSL_ERROR_WANT_WRITE) - { - ServerInstance->Log(DEBUG,"Want write, handshaking"); - session->wstat = ISSL_WRITE; - session->status = ISSL_HANDSHAKING; - MakePollWrite(session); - return true; - } - else - { - ServerInstance->Log(DEBUG,"Handshake failed"); - CloseSession(session); - } - - return false; - } - else if (ret > 0) - { - // Handshake complete. - // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater. - userrec* u = ServerInstance->FindDescriptor(session->fd); - if (u) - { - if (!u->GetExt("ssl", dummy)) - u->Extend("ssl", "ON"); - } - - session->status = ISSL_OPEN; - - MakePollWrite(session); - - return true; - } - else if (ret == 0) - { - int ssl_err = SSL_get_error(session->sess, ret); - char buf[1024]; - ERR_print_errors_fp(stderr); - ServerInstance->Log(DEBUG,"Handshake fail 2: %d: %s", ssl_err, ERR_error_string(ssl_err,buf)); - CloseSession(session); - return true; - } - - 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) - user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick, SSL_get_cipher(sessions[user->GetFd()].sess)); - } - } - - void MakePollWrite(issl_session* session) - { - OnRawSocketWrite(session->fd, NULL, 0); - //EventHandler* eh = ServerInstance->FindDescriptor(session->fd); - //if (eh) - // ServerInstance->SE->WantWrite(eh); - } - - void CloseSession(issl_session* session) - { - if (session->sess) - { - SSL_shutdown(session->sess); - SSL_free(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; - - X509* cert; - ssl_cert* certinfo = new ssl_cert; - unsigned int n; - unsigned char md[EVP_MAX_MD_SIZE]; - const EVP_MD *digest = EVP_md5(); - - user->Extend("ssl_cert",certinfo); - - cert = SSL_get_peer_certificate((SSL*)session->sess); - - if (!cert) - { - certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error()))); - return; - } - - certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0))); - - if (SelfSigned) - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0))); - certinfo->data.insert(std::make_pair("trusted",ConvToStr(1))); - } - else - { - certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1))); - certinfo->data.insert(std::make_pair("trusted",ConvToStr(0))); - } - - certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0)))); - certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0)))); - - if (!X509_digest(cert, digest, md, &n)) - { - certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint")); - } - else - { - certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n))); - } - - if ((ASN1_UTCTIME_cmp_time_t(X509_get_notAfter(cert), time(NULL)) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_get_notBefore(cert), time(NULL)) == 0)) - { - certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate")); - } - - X509_free(cert); - } -}; - -static int error_callback(const char *str, size_t len, void *u) -{ - ModuleSSLOpenSSL* mssl = (ModuleSSLOpenSSL*)u; - mssl->PublicInstance->Log(DEFAULT, "SSL error: " + std::string(str, len - 1)); - return 0; -} - -MODULE_INIT(ModuleSSLOpenSSL); - +/* +------------------------------------+
* | 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 <openssl/ssl.h>
#include <openssl/err.h>
#ifdef WINDOWS
#include <openssl/applink.c>
#endif
#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, "libeay32MTd")
#pragma comment(lib, "ssleay32MTd")
#undef MAX_DESCRIPTORS
#define MAX_DESCRIPTORS 10000
#endif
/* $ModDesc: Provides SSL support for clients */
/* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
/* $LinkerFlags: rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
/* $ModDep: transport.h */
enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
enum issl_io_status { ISSL_WRITE, ISSL_READ };
static bool SelfSigned = false;
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;
}
char* get_error()
{
return ERR_error_string(ERR_get_error(), NULL);
}
static int error_callback(const char *str, size_t len, void *u);
/** Represents an SSL user's extra data
*/
class issl_session : public classbase
{
public:
SSL* sess;
issl_status status;
issl_io_status rstat;
issl_io_status wstat;
unsigned int inbufoffset;
char* inbuf; // Buffer OpenSSL reads into.
std::string outbuf; // Buffer for outgoing data that OpenSSL will not take.
int fd;
bool outbound;
issl_session()
{
outbound = false;
rstat = ISSL_READ;
wstat = ISSL_WRITE;
}
};
static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
{
/* XXX: This will allow self signed certificates.
* In the future if we want an option to not allow this,
* we can just return preverify_ok here, and openssl
* will boot off self-signed and invalid peer certs.
*/
int ve = X509_STORE_CTX_get_error(ctx);
SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
return 1;
}
class ModuleSSLOpenSSL : public Module
{
ConfigReader* Conf;
std::vector<int> listenports;
int inbufsize;
issl_session sessions[MAX_DESCRIPTORS];
SSL_CTX* ctx;
SSL_CTX* clictx;
char* dummy;
char cipher[MAXBUF];
std::string keyfile;
std::string certfile;
std::string cafile;
// std::string crlfile;
std::string dhfile;
std::string sslports;
int clientactive;
public:
InspIRCd* PublicInstance;
ModuleSSLOpenSSL(InspIRCd* Me)
: Module(Me), PublicInstance(Me)
{
ServerInstance->PublishInterface("InspSocketHook", this);
// Not rehashable...because I cba to reduce all the sizes of existing buffers.
inbufsize = ServerInstance->Config->NetBufferSize;
/* Global SSL library initialization*/
SSL_library_init();
SSL_load_error_strings();
/* Build our SSL contexts:
* NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
*/
ctx = SSL_CTX_new( SSLv23_server_method() );
clictx = SSL_CTX_new( SSLv23_client_method() );
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
// Needs the flag as it ignores a plain /rehash
OnRehash(NULL,"ssl");
}
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) == "openssl"))
{
// 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_openssl.so: Enabling SSL for port %d", portno);
sslports.append("*:").append(ConvToStr(portno)).append(";");
}
else
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.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_openssl.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 another SSL or similar module loaded?", portno, e.GetReason());
}
}
}
}
if (!sslports.empty())
sslports.erase(sslports.end() - 1);
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("openssl", "cafile", 0);
certfile = Conf->ReadValue("openssl", "certfile", 0);
keyfile = Conf->ReadValue("openssl", "keyfile", 0);
dhfile = Conf->ReadValue("openssl", "dhfile", 0);
// Set all the default values needed.
if (cafile.empty())
cafile = "ca.pem";
if (certfile.empty())
certfile = "cert.pem";
if (keyfile.empty())
keyfile = "key.pem";
if (dhfile.empty())
dhfile = "dhparams.pem";
// Prepend relative paths with the path to the config directory.
if (cafile[0] != '/')
cafile = confdir + cafile;
if (certfile[0] != '/')
certfile = confdir + certfile;
if (keyfile[0] != '/')
keyfile = confdir + keyfile;
if (dhfile[0] != '/')
dhfile = confdir + dhfile;
/* Load our keys and certificates
* NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
*/
if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
ERR_print_errors_cb(error_callback, this);
}
if (((!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))) || (!SSL_CTX_use_PrivateKey_file(clictx, keyfile.c_str(), SSL_FILETYPE_PEM)))
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
ERR_print_errors_cb(error_callback, this);
}
/* Load the CAs we trust*/
if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));
ERR_print_errors_cb(error_callback, this);
}
FILE* dhpfile = fopen(dhfile.c_str(), "r");
DH* ret;
if (dhpfile == NULL)
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
}
else
{
ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
{
ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
ERR_print_errors_cb(error_callback, this);
}
}
fclose(dhpfile);
DELETE(Conf);
}
virtual void On005Numeric(std::string &output)
{
output.append(" SSL=" + sslports);
}
virtual ~ModuleSSLOpenSSL()
{
SSL_CTX_free(ctx);
SSL_CTX_free(clictx);
}
virtual void OnCleanup(int target_type, void* item)
{
if (target_type == TYPE_USER)
{
userrec* user = (userrec*)item;
if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && 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_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = List[I_On005Numeric] = 1;
List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
}
virtual char* OnRequest(Request* request)
{
ISHRequest* ISR = (ISHRequest*)request;
if (strcmp("IS_NAME", request->GetId()) == 0)
{
return "openssl";
}
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)
{
ServerInstance->Log(DEBUG,"Module checking if handshake is done");
if (ISR->Sock->GetFd() < 0)
return (char*)"OK";
issl_session* session = &sessions[ISR->Sock->GetFd()];
return (session->status == ISSL_HANDSHAKING) ? NULL : (char*)"OK";
}
else if (strcmp("IS_ATTACH", request->GetId()) == 0)
{
issl_session* session = &sessions[ISR->Sock->GetFd()];
if (session->sess)
{
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;
session->sess = SSL_new(ctx);
session->status = ISSL_NONE;
session->outbound = false;
if (session->sess == NULL)
return;
if (SSL_set_fd(session->sess, fd) == 0)
{
ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
return;
}
Handshake(session);
}
virtual void OnRawSocketConnect(int fd)
{
ServerInstance->Log(DEBUG,"OnRawSocketConnect connecting");
issl_session* session = &sessions[fd];
session->fd = fd;
session->inbuf = new char[inbufsize];
session->inbufoffset = 0;
session->sess = SSL_new(clictx);
session->status = ISSL_NONE;
session->outbound = true;
if (session->sess == NULL)
return;
if (SSL_set_fd(session->sess, fd) == 0)
{
ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
return;
}
Handshake(session);
ServerInstance->Log(DEBUG,"Exiting OnRawSocketConnect");
}
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];
ServerInstance->Log(DEBUG,"OnRawSocketRead");
if (!session->sess)
{
ServerInstance->Log(DEBUG,"OnRawSocketRead has no session");
readresult = 0;
CloseSession(session);
return 1;
}
if (session->status == ISSL_HANDSHAKING)
{
if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
{
ServerInstance->Log(DEBUG,"Resume handshake in read");
// The handshake isn't finished and it wants to read, try to finish it.
if (!Handshake(session))
{
ServerInstance->Log(DEBUG,"Cant resume handshake in read");
// Couldn't resume handshake.
return -1;
}
}
else
{
errno = EAGAIN;
return -1;
}
}
// If we resumed the handshake then session->status will be ISSL_OPEN
if (session->status == ISSL_OPEN)
{
if (session->wstat == ISSL_READ)
{
if(DoWrite(session) == 0)
return 0;
}
if (session->rstat == ISSL_READ)
{
int ret = DoRead(session);
if (ret > 0)
{
if (count <= session->inbufoffset)
{
memcpy(buffer, session->inbuf, count);
// Move the stuff left in inbuf to the beginning of it
memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
// Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
session->inbufoffset -= count;
// Insp uses readresult as the count of how much data there is in buffer, so:
readresult = count;
}
else
{
// There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
memcpy(buffer, session->inbuf, session->inbufoffset);
readresult = session->inbufoffset;
// Zero the offset, as there's nothing there..
session->inbufoffset = 0;
}
return 1;
}
else
{
return ret;
}
}
}
return -1;
}
virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
{
issl_session* session = &sessions[fd];
if (!session->sess)
{
ServerInstance->Log(DEBUG,"Close session missing sess");
CloseSession(session);
return -1;
}
session->outbuf.append(buffer, count);
if (session->status == ISSL_HANDSHAKING)
{
// The handshake isn't finished, try to finish it.
if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
{
ServerInstance->Log(DEBUG,"Handshake resume");
Handshake(session);
}
}
if (session->status == ISSL_OPEN)
{
if (session->rstat == ISSL_WRITE)
{
ServerInstance->Log(DEBUG,"DoRead");
DoRead(session);
}
if (session->wstat == ISSL_WRITE)
{
ServerInstance->Log(DEBUG,"DoWrite");
return DoWrite(session);
}
}
return 1;
}
int DoWrite(issl_session* session)
{
if (!session->outbuf.size())
return -1;
int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
if (ret == 0)
{
ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_write");
CloseSession(session);
return 0;
}
else if (ret < 0)
{
int err = SSL_get_error(session->sess, ret);
if (err == SSL_ERROR_WANT_WRITE)
{
session->wstat = ISSL_WRITE;
return -1;
}
else if (err == SSL_ERROR_WANT_READ)
{
session->wstat = ISSL_READ;
return -1;
}
else
{
ServerInstance->Log(DEBUG,"Close due to returned -1 in SSL_Write");
CloseSession(session);
return 0;
}
}
else
{
session->outbuf = session->outbuf.substr(ret);
return ret;
}
}
int DoRead(issl_session* session)
{
// 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.
ServerInstance->Log(DEBUG,"DoRead");
int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
if (ret == 0)
{
// Client closed connection.
ServerInstance->Log(DEBUG,"Oops, got 0 from SSL_read");
CloseSession(session);
return 0;
}
else if (ret < 0)
{
int err = SSL_get_error(session->sess, ret);
if (err == SSL_ERROR_WANT_READ)
{
session->rstat = ISSL_READ;
ServerInstance->Log(DEBUG,"Setting want_read");
return -1;
}
else if (err == SSL_ERROR_WANT_WRITE)
{
session->rstat = ISSL_WRITE;
ServerInstance->Log(DEBUG,"Setting want_write");
return -1;
}
else
{
ServerInstance->Log(DEBUG,"Closed due to returned -1 in SSL_Read");
CloseSession(session);
return 0;
}
}
else
{
// Read successfully 'ret' bytes into inbuf + inbufoffset
// There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
// 'buffer' is 'count' long
session->inbufoffset += ret;
return 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)
{
ServerInstance->Log(DEBUG,"Handshake");
int ret;
if (session->outbound)
{
ServerInstance->Log(DEBUG,"SSL_connect");
ret = SSL_connect(session->sess);
}
else
ret = SSL_accept(session->sess);
if (ret < 0)
{
int err = SSL_get_error(session->sess, ret);
if (err == SSL_ERROR_WANT_READ)
{
ServerInstance->Log(DEBUG,"Want read, handshaking");
session->rstat = ISSL_READ;
session->status = ISSL_HANDSHAKING;
return true;
}
else if (err == SSL_ERROR_WANT_WRITE)
{
ServerInstance->Log(DEBUG,"Want write, handshaking");
session->wstat = ISSL_WRITE;
session->status = ISSL_HANDSHAKING;
MakePollWrite(session);
return true;
}
else
{
ServerInstance->Log(DEBUG,"Handshake failed");
CloseSession(session);
}
return false;
}
else if (ret > 0)
{
// Handshake complete.
// This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
userrec* u = ServerInstance->FindDescriptor(session->fd);
if (u)
{
if (!u->GetExt("ssl", dummy))
u->Extend("ssl", "ON");
}
session->status = ISSL_OPEN;
MakePollWrite(session);
return true;
}
else if (ret == 0)
{
int ssl_err = SSL_get_error(session->sess, ret);
char buf[1024];
ERR_print_errors_fp(stderr);
ServerInstance->Log(DEBUG,"Handshake fail 2: %d: %s", ssl_err, ERR_error_string(ssl_err,buf));
CloseSession(session);
return true;
}
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)
user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick, SSL_get_cipher(sessions[user->GetFd()].sess));
}
}
void MakePollWrite(issl_session* session)
{
OnRawSocketWrite(session->fd, NULL, 0);
//EventHandler* eh = ServerInstance->FindDescriptor(session->fd);
//if (eh)
// ServerInstance->SE->WantWrite(eh);
}
void CloseSession(issl_session* session)
{
if (session->sess)
{
SSL_shutdown(session->sess);
SSL_free(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;
X509* cert;
ssl_cert* certinfo = new ssl_cert;
unsigned int n;
unsigned char md[EVP_MAX_MD_SIZE];
const EVP_MD *digest = EVP_md5();
user->Extend("ssl_cert",certinfo);
cert = SSL_get_peer_certificate((SSL*)session->sess);
if (!cert)
{
certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
return;
}
certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
if (SelfSigned)
{
certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
}
else
{
certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
}
certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
if (!X509_digest(cert, digest, md, &n))
{
certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
}
else
{
certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
}
if ((ASN1_UTCTIME_cmp_time_t(X509_get_notAfter(cert), time(NULL)) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_get_notBefore(cert), time(NULL)) == 0))
{
certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
}
X509_free(cert);
}
};
static int error_callback(const char *str, size_t len, void *u)
{
ModuleSSLOpenSSL* mssl = (ModuleSSLOpenSSL*)u;
mssl->PublicInstance->Log(DEFAULT, "SSL error: " + std::string(str, len - 1));
return 0;
}
MODULE_INIT(ModuleSSLOpenSSL);
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