src/modules/extra/m_ssl_openssl.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include <string>
  15 #include <vector>
  16
  17 #include <openssl/ssl.h>
  18 #include <openssl/err.h>
  19
  20 #include "inspircd_config.h"
  21 #include "configreader.h"
  22 #include "users.h"
  23 #include "channels.h"
  24 #include "modules.h"
  25
  26 #include "socket.h"
  27 #include "hashcomp.h"
  28 #include "inspircd.h"
  29
  30 #include "transport.h"
  31
  32 /* $ModDesc: Provides SSL support for clients */
  33 /* $CompileFlags: pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
  34 /* $LinkerFlags: pkgconflibs("openssl","/libssl.so","-lssl -lcrypto") */
  35 /* $ModDep: transport.h */
  36
  37 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
  38 enum issl_io_status { ISSL_WRITE, ISSL_READ };
  39
  40 static bool SelfSigned = false;
  41
  42 bool isin(int port, const std::vector<int> &portlist)
  43 {
  44         for(unsigned int i = 0; i < portlist.size(); i++)
  45                 if(portlist[i] == port)
  46                         return true;
  47
  48         return false;
  49 }
  50
  51 char* get_error()
  52 {
  53         return ERR_error_string(ERR_get_error(), NULL);
  54 }
  55
  56 /** Represents an SSL user's extra data
  57  */
  58 class issl_session : public classbase
  59 {
  60 public:
  61         SSL* sess;
  62         issl_status status;
  63         issl_io_status rstat;
  64         issl_io_status wstat;
  65
  66         unsigned int inbufoffset;
  67         char* inbuf;                    // Buffer OpenSSL reads into.
  68         std::string outbuf;     // Buffer for outgoing data that OpenSSL will not take.
  69         int fd;
  70
  71         issl_session()
  72         {
  73                 rstat = ISSL_READ;
  74                 wstat = ISSL_WRITE;
  75         }
  76 };
  77
  78 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  79 {
  80         /* XXX: This will allow self signed certificates.
  81          * In the future if we want an option to not allow this,
  82          * we can just return preverify_ok here, and openssl
  83          * will boot off self-signed and invalid peer certs.
  84          */
  85         int ve = X509_STORE_CTX_get_error(ctx);
  86
  87         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  88
  89         return 1;
  90 }
  91
  92 class ModuleSSLOpenSSL : public Module
  93 {
  94
  95         ConfigReader* Conf;
  96
  97         CullList* culllist;
  98
  99         std::vector<int> listenports;
 100
 101         int inbufsize;
 102         issl_session sessions[MAX_DESCRIPTORS];
 103
 104         SSL_CTX* ctx;
 105
 106         char* dummy;
 107
 108         std::string keyfile;
 109         std::string certfile;
 110         std::string cafile;
 111         // std::string crlfile;
 112         std::string dhfile;
 113
 114  public:
 115
 116         ModuleSSLOpenSSL(InspIRCd* Me)
 117                 : Module::Module(Me)
 118         {
 119                 culllist = new CullList(ServerInstance);
 120
 121                 ServerInstance->PublishInterface("InspSocketHook", this);
 122
 123                 // Not rehashable...because I cba to reduce all the sizes of existing buffers.
 124                 inbufsize = ServerInstance->Config->NetBufferSize;
 125
 126                 /* Global SSL library initialization*/
 127                 SSL_library_init();
 128                 SSL_load_error_strings();
 129
 130                 /* Build our SSL context*/
 131                 ctx = SSL_CTX_new( SSLv23_server_method() );
 132
 133                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 134
 135                 // Needs the flag as it ignores a plain /rehash
 136                 OnRehash(NULL,"ssl");
 137         }
 138
 139         virtual void OnRehash(userrec* user, const std::string &param)
 140         {
 141                 if (param != "ssl")
 142                         return;
 143
 144                 Conf = new ConfigReader(ServerInstance);
 145
 146                 for (unsigned int i = 0; i < listenports.size(); i++)
 147                 {
 148                         ServerInstance->Config->DelIOHook(listenports[i]);
 149                 }
 150
 151                 listenports.clear();
 152
 153                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
 154                 {
 155                         // For each <bind> tag
 156                         if (((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "openssl"))
 157                         {
 158                                 // Get the port we're meant to be listening on with SSL
 159                                 std::string port = Conf->ReadValue("bind", "port", i);
 160                                 irc::portparser portrange(port, false);
 161                                 long portno = -1;
 162                                 while ((portno = portrange.GetToken()))
 163                                 {
 164                                         if (ServerInstance->Config->AddIOHook(portno, this))
 165                                         {
 166                                                 listenports.push_back(portno);
 167                                                 for (unsigned int i = 0; i < ServerInstance->stats->BoundPortCount; i++)
 168                                                         if (ServerInstance->Config->ports[i] == portno)
 169                                                                 ServerInstance->Config->openSockfd[i]->SetDescription("ssl");
 170                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", portno);
 171                                         }
 172                                         else
 173                                         {
 174                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
 175                                         }
 176                                 }
 177                         }
 178                 }
 179
 180                 std::string confdir(CONFIG_FILE);
 181                 // +1 so we the path ends with a /
 182                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 183
 184                 cafile   = Conf->ReadValue("openssl", "cafile", 0);
 185                 certfile = Conf->ReadValue("openssl", "certfile", 0);
 186                 keyfile  = Conf->ReadValue("openssl", "keyfile", 0);
 187                 dhfile   = Conf->ReadValue("openssl", "dhfile", 0);
 188
 189                 // Set all the default values needed.
 190                 if (cafile == "")
 191                         cafile = "ca.pem";
 192
 193                 if (certfile == "")
 194                         certfile = "cert.pem";
 195
 196                 if (keyfile == "")
 197                         keyfile = "key.pem";
 198
 199                 if (dhfile == "")
 200                         dhfile = "dhparams.pem";
 201
 202                 // Prepend relative paths with the path to the config directory.
 203                 if (cafile[0] != '/')
 204                         cafile = confdir + cafile;
 205
 206                 //if(crlfile[0] != '/')
 207                 //      crlfile = confdir + crlfile;
 208
 209                 if (certfile[0] != '/')
 210                         certfile = confdir + certfile;
 211
 212                 if (keyfile[0] != '/')
 213                         keyfile = confdir + keyfile;
 214
 215                 if (dhfile[0] != '/')
 216                         dhfile = confdir + dhfile;
 217
 218                 /* Load our keys and certificates*/
 219                 if (!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str()))
 220                 {
 221                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 222                 }
 223
 224                 if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))
 225                 {
 226                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 227                 }
 228
 229                 /* Load the CAs we trust*/
 230                 if (!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))
 231                 {
 232                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 233                 }
 234
 235                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 236                 DH* ret;
 237
 238                 if (dhpfile == NULL)
 239                 {
 240                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 241                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 242                 }
 243                 else
 244                 {
 245                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 246
 247                         if(SSL_CTX_set_tmp_dh(ctx, ret) < 0)
 248                         {
 249                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 250                         }
 251                 }
 252
 253                 fclose(dhpfile);
 254
 255                 DELETE(Conf);
 256         }
 257
 258         virtual ~ModuleSSLOpenSSL()
 259         {
 260                 SSL_CTX_free(ctx);
 261                 delete culllist;
 262         }
 263
 264         virtual void OnCleanup(int target_type, void* item)
 265         {
 266                 if (target_type == TYPE_USER)
 267                 {
 268                         userrec* user = (userrec*)item;
 269
 270                         if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 271                         {
 272                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 273                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 274                                 culllist->AddItem(user, "SSL module unloading");
 275                         }
 276                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 277                         {
 278                                 ssl_cert* tofree;
 279                                 user->GetExt("ssl_cert", tofree);
 280                                 delete tofree;
 281                                 user->Shrink("ssl_cert");
 282                         }
 283                 }
 284         }
 285
 286         virtual void OnUnloadModule(Module* mod, const std::string &name)
 287         {
 288                 if (mod == this)
 289                 {
 290                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 291                         culllist->Apply();
 292
 293                         for(unsigned int i = 0; i < listenports.size(); i++)
 294                         {
 295                                 ServerInstance->Config->DelIOHook(listenports[i]);
 296                                 for (unsigned int j = 0; j < ServerInstance->stats->BoundPortCount; j++)
 297                                         if (ServerInstance->Config->ports[j] == listenports[i])
 298                                                 if (ServerInstance->Config->openSockfd[j])
 299                                                         ServerInstance->Config->openSockfd[j]->SetDescription("plaintext");
 300                         }
 301                 }
 302         }
 303
 304         virtual Version GetVersion()
 305         {
 306                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 307         }
 308
 309         void Implements(char* List)
 310         {
 311                 List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 312                 List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 313         }
 314
 315         virtual char* OnRequest(Request* request)
 316         {
 317                 ISHRequest* ISR = (ISHRequest*)request;
 318                 if (strcmp("IS_NAME", request->GetId()) == 0)
 319                 {
 320                         return "openssl";
 321                 }
 322                 else if (strcmp("IS_HOOK", request->GetId()) == 0)
 323                 {
 324                         char* ret = "OK";
 325                         try
 326                         {
 327                                 ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 328                         }
 329                         catch (ModuleException &e)
 330                         {
 331                                 return NULL;
 332                         }
 333
 334                         return ret;
 335                 }
 336                 else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
 337                 {
 338                         return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 339                 }
 340                 else if (strcmp("IS_HSDONE", request->GetId()) == 0)
 341                 {
 342                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 343                         return (session->status == ISSL_HANDSHAKING) ? NULL : (char*)"OK";
 344                 }
 345                 else if (strcmp("IS_ATTACH", request->GetId()) == 0)
 346                 {
 347                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 348                         if (session)
 349                         {
 350                                 VerifyCertificate(session, (InspSocket*)ISR->Sock);
 351                                 return "OK";
 352                         }
 353                 }
 354                 return NULL;
 355         }
 356
 357
 358         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 359         {
 360                 issl_session* session = &sessions[fd];
 361
 362                 session->fd = fd;
 363                 session->inbuf = new char[inbufsize];
 364                 session->inbufoffset = 0;
 365                 session->sess = SSL_new(ctx);
 366                 session->status = ISSL_NONE;
 367
 368                 if (session->sess == NULL)
 369                         return;
 370
 371                 if (SSL_set_fd(session->sess, fd) == 0)
 372                         return;
 373
 374                 Handshake(session);
 375         }
 376
 377         virtual void OnRawSocketConnect(int fd)
 378         {
 379                 issl_session* session = &sessions[fd];
 380
 381                 session->fd = fd;
 382                 session->inbuf = new char[inbufsize];
 383                 session->inbufoffset = 0;
 384                 session->sess = SSL_new(ctx);
 385                 session->status = ISSL_NONE;
 386
 387                 if (session->sess == NULL)
 388                         return;
 389
 390                 if (SSL_set_fd(session->sess, fd) == 0)
 391                         return;
 392
 393                 Handshake(session);
 394         }
 395
 396         virtual void OnRawSocketClose(int fd)
 397         {
 398                 CloseSession(&sessions[fd]);
 399
 400                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 401
 402                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 403                 {
 404                         ssl_cert* tofree;
 405                         user->GetExt("ssl_cert", tofree);
 406                         delete tofree;
 407                         user->Shrink("ssl_cert");
 408                 }
 409         }
 410
 411         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 412         {
 413                 issl_session* session = &sessions[fd];
 414
 415                 if (!session->sess)
 416                 {
 417                         readresult = 0;
 418                         CloseSession(session);
 419                         return 1;
 420                 }
 421
 422                 if (session->status == ISSL_HANDSHAKING)
 423                 {
 424                         if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
 425                         {
 426                                 // The handshake isn't finished and it wants to read, try to finish it.
 427                                 if (!Handshake(session))
 428                                 {
 429                                         // Couldn't resume handshake.
 430                                         return -1;
 431                                 }
 432                         }
 433                         else
 434                         {
 435                                 return -1;
 436                         }
 437                 }
 438
 439                 // If we resumed the handshake then session->status will be ISSL_OPEN
 440
 441                 if (session->status == ISSL_OPEN)
 442                 {
 443                         if (session->wstat == ISSL_READ)
 444                         {
 445                                 if(DoWrite(session) == 0)
 446                                         return 0;
 447                         }
 448
 449                         if (session->rstat == ISSL_READ)
 450                         {
 451                                 int ret = DoRead(session);
 452
 453                                 if (ret > 0)
 454                                 {
 455                                         if (count <= session->inbufoffset)
 456                                         {
 457                                                 memcpy(buffer, session->inbuf, count);
 458                                                 // Move the stuff left in inbuf to the beginning of it
 459                                                 memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
 460                                                 // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
 461                                                 session->inbufoffset -= count;
 462                                                 // Insp uses readresult as the count of how much data there is in buffer, so:
 463                                                 readresult = count;
 464                                         }
 465                                         else
 466                                         {
 467                                                 // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
 468                                                 memcpy(buffer, session->inbuf, session->inbufoffset);
 469
 470                                                 readresult = session->inbufoffset;
 471                                                 // Zero the offset, as there's nothing there..
 472                                                 session->inbufoffset = 0;
 473                                         }
 474
 475                                         return 1;
 476                                 }
 477                                 else
 478                                 {
 479                                         return ret;
 480                                 }
 481                         }
 482                 }
 483
 484                 return -1;
 485         }
 486
 487         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 488         {
 489                 issl_session* session = &sessions[fd];
 490
 491                 if (!session->sess)
 492                 {
 493                         CloseSession(session);
 494                         return 1;
 495                 }
 496
 497                 session->outbuf.append(buffer, count);
 498
 499                 if (session->status == ISSL_HANDSHAKING)
 500                 {
 501                         // The handshake isn't finished, try to finish it.
 502                         if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 503                                 Handshake(session);
 504                 }
 505
 506                 if (session->status == ISSL_OPEN)
 507                 {
 508                         if (session->rstat == ISSL_WRITE)
 509                                 DoRead(session);
 510
 511                         if (session->wstat == ISSL_WRITE)
 512                                 return DoWrite(session);
 513                 }
 514
 515                 return 1;
 516         }
 517
 518         int DoWrite(issl_session* session)
 519         {
 520                 if (!session->outbuf.size())
 521                         return -1;
 522
 523                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 524
 525                 if (ret == 0)
 526                 {
 527                         CloseSession(session);
 528                         return 0;
 529                 }
 530                 else if (ret < 0)
 531                 {
 532                         int err = SSL_get_error(session->sess, ret);
 533
 534                         if (err == SSL_ERROR_WANT_WRITE)
 535                         {
 536                                 session->wstat = ISSL_WRITE;
 537                                 return -1;
 538                         }
 539                         else if (err == SSL_ERROR_WANT_READ)
 540                         {
 541                                 session->wstat = ISSL_READ;
 542                                 return -1;
 543                         }
 544                         else
 545                         {
 546                                 CloseSession(session);
 547                                 return 0;
 548                         }
 549                 }
 550                 else
 551                 {
 552                         session->outbuf = session->outbuf.substr(ret);
 553                         return ret;
 554                 }
 555         }
 556
 557         int DoRead(issl_session* session)
 558         {
 559                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 560                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 561
 562                 int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
 563
 564                 if (ret == 0)
 565                 {
 566                         // Client closed connection.
 567                         CloseSession(session);
 568                         return 0;
 569                 }
 570                 else if (ret < 0)
 571                 {
 572                         int err = SSL_get_error(session->sess, ret);
 573
 574                         if (err == SSL_ERROR_WANT_READ)
 575                         {
 576                                 session->rstat = ISSL_READ;
 577                                 return -1;
 578                         }
 579                         else if (err == SSL_ERROR_WANT_WRITE)
 580                         {
 581                                 session->rstat = ISSL_WRITE;
 582                                 return -1;
 583                         }
 584                         else
 585                         {
 586                                 CloseSession(session);
 587                                 return 0;
 588                         }
 589                 }
 590                 else
 591                 {
 592                         // Read successfully 'ret' bytes into inbuf + inbufoffset
 593                         // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
 594                         // 'buffer' is 'count' long
 595
 596                         session->inbufoffset += ret;
 597
 598                         return ret;
 599                 }
 600         }
 601
 602         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 603         virtual void OnWhois(userrec* source, userrec* dest)
 604         {
 605                 // Bugfix, only send this numeric for *our* SSL users
 606                 if (dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 607                 {
 608                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
 609                 }
 610         }
 611
 612         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 613         {
 614                 // check if the linking module wants to know about OUR metadata
 615                 if (extname == "ssl")
 616                 {
 617                         // check if this user has an swhois field to send
 618                         if(user->GetExt(extname, dummy))
 619                         {
 620                                 // call this function in the linking module, let it format the data how it
 621                                 // sees fit, and send it on its way. We dont need or want to know how.
 622                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 623                         }
 624                 }
 625         }
 626
 627         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 628         {
 629                 // check if its our metadata key, and its associated with a user
 630                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 631                 {
 632                         userrec* dest = (userrec*)target;
 633                         // if they dont already have an ssl flag, accept the remote server's
 634                         if (!dest->GetExt(extname, dummy))
 635                         {
 636                                 dest->Extend(extname, "ON");
 637                         }
 638                 }
 639         }
 640
 641         bool Handshake(issl_session* session)
 642         {
 643                 int ret = SSL_accept(session->sess);
 644
 645                 if (ret < 0)
 646                 {
 647                         int err = SSL_get_error(session->sess, ret);
 648
 649                         if (err == SSL_ERROR_WANT_READ)
 650                         {
 651                                 session->rstat = ISSL_READ;
 652                                 session->status = ISSL_HANDSHAKING;
 653                         }
 654                         else if (err == SSL_ERROR_WANT_WRITE)
 655                         {
 656                                 session->wstat = ISSL_WRITE;
 657                                 session->status = ISSL_HANDSHAKING;
 658                                 MakePollWrite(session);
 659                         }
 660                         else
 661                                 CloseSession(session);
 662
 663                         return false;
 664                 }
 665                 else
 666                 {
 667                         // Handshake complete.
 668                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 669                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 670                         if (u)
 671                         {
 672                                 if (!u->GetExt("ssl", dummy))
 673                                         u->Extend("ssl", "ON");
 674                         }
 675
 676                         session->status = ISSL_OPEN;
 677
 678                         MakePollWrite(session);
 679
 680                         return true;
 681                 }
 682         }
 683
 684         virtual void OnPostConnect(userrec* user)
 685         {
 686                 // This occurs AFTER OnUserConnect so we can be sure the
 687                 // protocol module has propogated the NICK message.
 688                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 689                 {
 690                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 691                         std::deque<std::string>* metadata = new std::deque<std::string>;
 692                         metadata->push_back(user->nick);
 693                         metadata->push_back("ssl");             // The metadata id
 694                         metadata->push_back("ON");              // The value to send
 695                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 696                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 697                         DELETE(event);
 698                         DELETE(metadata);
 699
 700                         VerifyCertificate(&sessions[user->GetFd()], user);
 701                 }
 702         }
 703
 704         void MakePollWrite(issl_session* session)
 705         {
 706                 OnRawSocketWrite(session->fd, NULL, 0);
 707         }
 708
 709         void CloseSession(issl_session* session)
 710         {
 711                 if (session->sess)
 712                 {
 713                         SSL_shutdown(session->sess);
 714                         SSL_free(session->sess);
 715                 }
 716
 717                 if (session->inbuf)
 718                 {
 719                         delete[] session->inbuf;
 720                 }
 721
 722                 session->outbuf.clear();
 723                 session->inbuf = NULL;
 724                 session->sess = NULL;
 725                 session->status = ISSL_NONE;
 726         }
 727
 728         void VerifyCertificate(issl_session* session, Extensible* user)
 729         {
 730                 X509* cert;
 731                 ssl_cert* certinfo = new ssl_cert;
 732                 unsigned int n;
 733                 unsigned char md[EVP_MAX_MD_SIZE];
 734                 const EVP_MD *digest = EVP_md5();
 735
 736                 user->Extend("ssl_cert",certinfo);
 737
 738                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 739
 740                 if (!cert)
 741                 {
 742                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 743                         return;
 744                 }
 745
 746                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 747
 748                 if (SelfSigned)
 749                 {
 750                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 751                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 752                 }
 753                 else
 754                 {
 755                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 756                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 757                 }
 758
 759                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 760                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 761
 762                 if (!X509_digest(cert, digest, md, &n))
 763                 {
 764                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 765                 }
 766                 else
 767                 {
 768                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 769                 }
 770
 771                 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))
 772                 {
 773                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 774                 }
 775
 776                 X509_free(cert);
 777         }
 778 };
 779
 780 class ModuleSSLOpenSSLFactory : public ModuleFactory
 781 {
 782  public:
 783         ModuleSSLOpenSSLFactory()
 784         {
 785         }
 786
 787         ~ModuleSSLOpenSSLFactory()
 788         {
 789         }
 790
 791         virtual Module * CreateModule(InspIRCd* Me)
 792         {
 793                 return new ModuleSSLOpenSSL(Me);
 794         }
 795 };
 796
 797
 798 extern "C" void * init_module( void )
 799 {
 800         return new ModuleSSLOpenSSLFactory;
 801 }