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         bool outbound;
  71
  72         issl_session()
  73         {
  74                 outbound = false;
  75                 rstat = ISSL_READ;
  76                 wstat = ISSL_WRITE;
  77         }
  78 };
  79
  80 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  81 {
  82         /* XXX: This will allow self signed certificates.
  83          * In the future if we want an option to not allow this,
  84          * we can just return preverify_ok here, and openssl
  85          * will boot off self-signed and invalid peer certs.
  86          */
  87         int ve = X509_STORE_CTX_get_error(ctx);
  88
  89         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  90
  91         return 1;
  92 }
  93
  94 class ModuleSSLOpenSSL : public Module
  95 {
  96
  97         ConfigReader* Conf;
  98
  99         CullList* culllist;
 100
 101         std::vector<int> listenports;
 102
 103         int inbufsize;
 104         issl_session sessions[MAX_DESCRIPTORS];
 105
 106         SSL_CTX* ctx;
 107         SSL_CTX* clictx;
 108
 109         char* dummy;
 110
 111         std::string keyfile;
 112         std::string certfile;
 113         std::string cafile;
 114         // std::string crlfile;
 115         std::string dhfile;
 116
 117  public:
 118
 119         ModuleSSLOpenSSL(InspIRCd* Me)
 120                 : Module::Module(Me)
 121         {
 122                 culllist = new CullList(ServerInstance);
 123
 124                 ServerInstance->PublishInterface("InspSocketHook", this);
 125
 126                 // Not rehashable...because I cba to reduce all the sizes of existing buffers.
 127                 inbufsize = ServerInstance->Config->NetBufferSize;
 128
 129                 /* Global SSL library initialization*/
 130                 SSL_library_init();
 131                 SSL_load_error_strings();
 132
 133                 /* Build our SSL context*/
 134                 ctx = SSL_CTX_new( SSLv23_server_method() );
 135                 clictx = SSL_CTX_new( SSLv23_client_method() );
 136
 137                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 138                 SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 139
 140                 // Needs the flag as it ignores a plain /rehash
 141                 OnRehash(NULL,"ssl");
 142         }
 143
 144         virtual void OnRehash(userrec* user, const std::string &param)
 145         {
 146                 if (param != "ssl")
 147                         return;
 148
 149                 Conf = new ConfigReader(ServerInstance);
 150
 151                 for (unsigned int i = 0; i < listenports.size(); i++)
 152                 {
 153                         ServerInstance->Config->DelIOHook(listenports[i]);
 154                 }
 155
 156                 listenports.clear();
 157
 158                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
 159                 {
 160                         // For each <bind> tag
 161                         if (((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "openssl"))
 162                         {
 163                                 // Get the port we're meant to be listening on with SSL
 164                                 std::string port = Conf->ReadValue("bind", "port", i);
 165                                 irc::portparser portrange(port, false);
 166                                 long portno = -1;
 167                                 while ((portno = portrange.GetToken()))
 168                                 {
 169                                         if (ServerInstance->Config->AddIOHook(portno, this))
 170                                         {
 171                                                 listenports.push_back(portno);
 172                                                 for (unsigned int i = 0; i < ServerInstance->stats->BoundPortCount; i++)
 173                                                         if (ServerInstance->Config->ports[i] == portno)
 174                                                                 ServerInstance->Config->openSockfd[i]->SetDescription("ssl");
 175                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", portno);
 176                                         }
 177                                         else
 178                                         {
 179                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
 180                                         }
 181                                 }
 182                         }
 183                 }
 184
 185                 std::string confdir(CONFIG_FILE);
 186                 // +1 so we the path ends with a /
 187                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 188
 189                 cafile   = Conf->ReadValue("openssl", "cafile", 0);
 190                 certfile = Conf->ReadValue("openssl", "certfile", 0);
 191                 keyfile  = Conf->ReadValue("openssl", "keyfile", 0);
 192                 dhfile   = Conf->ReadValue("openssl", "dhfile", 0);
 193
 194                 // Set all the default values needed.
 195                 if (cafile == "")
 196                         cafile = "ca.pem";
 197
 198                 if (certfile == "")
 199                         certfile = "cert.pem";
 200
 201                 if (keyfile == "")
 202                         keyfile = "key.pem";
 203
 204                 if (dhfile == "")
 205                         dhfile = "dhparams.pem";
 206
 207                 // Prepend relative paths with the path to the config directory.
 208                 if (cafile[0] != '/')
 209                         cafile = confdir + cafile;
 210
 211                 //if(crlfile[0] != '/')
 212                 //      crlfile = confdir + crlfile;
 213
 214                 if (certfile[0] != '/')
 215                         certfile = confdir + certfile;
 216
 217                 if (keyfile[0] != '/')
 218                         keyfile = confdir + keyfile;
 219
 220                 if (dhfile[0] != '/')
 221                         dhfile = confdir + dhfile;
 222
 223                 /* Load our keys and certificates*/
 224                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 225                 {
 226                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 227                 }
 228
 229                 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)))
 230                 {
 231                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 232                 }
 233
 234                 /* Load the CAs we trust*/
 235                 if ((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0)) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 236                 {
 237                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 238                 }
 239
 240                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 241                 DH* ret;
 242
 243                 if (dhpfile == NULL)
 244                 {
 245                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 246                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 247                 }
 248                 else
 249                 {
 250                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 251
 252                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 253                         {
 254                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 255                         }
 256                 }
 257
 258                 fclose(dhpfile);
 259
 260                 DELETE(Conf);
 261         }
 262
 263         virtual ~ModuleSSLOpenSSL()
 264         {
 265                 SSL_CTX_free(ctx);
 266                 SSL_CTX_free(clictx);
 267                 delete culllist;
 268         }
 269
 270         virtual void OnCleanup(int target_type, void* item)
 271         {
 272                 if (target_type == TYPE_USER)
 273                 {
 274                         userrec* user = (userrec*)item;
 275
 276                         if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 277                         {
 278                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 279                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 280                                 culllist->AddItem(user, "SSL module unloading");
 281                         }
 282                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 283                         {
 284                                 ssl_cert* tofree;
 285                                 user->GetExt("ssl_cert", tofree);
 286                                 delete tofree;
 287                                 user->Shrink("ssl_cert");
 288                         }
 289                 }
 290         }
 291
 292         virtual void OnUnloadModule(Module* mod, const std::string &name)
 293         {
 294                 if (mod == this)
 295                 {
 296                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 297                         culllist->Apply();
 298
 299                         for(unsigned int i = 0; i < listenports.size(); i++)
 300                         {
 301                                 ServerInstance->Config->DelIOHook(listenports[i]);
 302                                 for (unsigned int j = 0; j < ServerInstance->stats->BoundPortCount; j++)
 303                                         if (ServerInstance->Config->ports[j] == listenports[i])
 304                                                 if (ServerInstance->Config->openSockfd[j])
 305                                                         ServerInstance->Config->openSockfd[j]->SetDescription("plaintext");
 306                         }
 307                 }
 308         }
 309
 310         virtual Version GetVersion()
 311         {
 312                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 313         }
 314
 315         void Implements(char* List)
 316         {
 317                 List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 318                 List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 319         }
 320
 321         virtual char* OnRequest(Request* request)
 322         {
 323                 ISHRequest* ISR = (ISHRequest*)request;
 324                 if (strcmp("IS_NAME", request->GetId()) == 0)
 325                 {
 326                         return "openssl";
 327                 }
 328                 else if (strcmp("IS_HOOK", request->GetId()) == 0)
 329                 {
 330                         char* ret = "OK";
 331                         try
 332                         {
 333                                 ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 334                         }
 335                         catch (ModuleException &e)
 336                         {
 337                                 return NULL;
 338                         }
 339
 340                         return ret;
 341                 }
 342                 else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
 343                 {
 344                         return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 345                 }
 346                 else if (strcmp("IS_HSDONE", request->GetId()) == 0)
 347                 {
 348                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 349                         return (session->status == ISSL_HANDSHAKING) ? NULL : (char*)"OK";
 350                 }
 351                 else if (strcmp("IS_ATTACH", request->GetId()) == 0)
 352                 {
 353                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 354                         if (session)
 355                         {
 356                                 VerifyCertificate(session, (InspSocket*)ISR->Sock);
 357                                 return "OK";
 358                         }
 359                 }
 360                 return NULL;
 361         }
 362
 363
 364         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 365         {
 366                 issl_session* session = &sessions[fd];
 367
 368                 session->fd = fd;
 369                 session->inbuf = new char[inbufsize];
 370                 session->inbufoffset = 0;
 371                 session->sess = SSL_new(ctx);
 372                 session->status = ISSL_NONE;
 373                 session->outbound = false;
 374
 375                 if (session->sess == NULL)
 376                         return;
 377
 378                 if (SSL_set_fd(session->sess, fd) == 0)
 379                 {
 380                         ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 381                         return;
 382                 }
 383
 384                 Handshake(session);
 385         }
 386
 387         virtual void OnRawSocketConnect(int fd)
 388         {
 389                 ServerInstance->Log(DEBUG,"ON RAW SOCKET CONNECT WITH FD %d", fd);
 390                 issl_session* session = &sessions[fd];
 391
 392                 session->fd = fd;
 393                 session->inbuf = new char[inbufsize];
 394                 session->inbufoffset = 0;
 395                 session->sess = SSL_new(clictx);
 396                 session->status = ISSL_NONE;
 397                 session->outbound = true;
 398
 399                 ServerInstance->Log(DEBUG,"Session: %08x", session->sess);
 400
 401                 if (session->sess == NULL)
 402                         return;
 403
 404                 if (SSL_set_fd(session->sess, fd) == 0)
 405                 {
 406                         ServerInstance->Log(DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 407                         return;
 408                 }
 409
 410                 Handshake(session);
 411         }
 412
 413         virtual void OnRawSocketClose(int fd)
 414         {
 415                 CloseSession(&sessions[fd]);
 416
 417                 ServerInstance->Log(DEBUG,"SSL session close: %d", fd);
 418
 419                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 420
 421                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 422                 {
 423                         ssl_cert* tofree;
 424                         user->GetExt("ssl_cert", tofree);
 425                         delete tofree;
 426                         user->Shrink("ssl_cert");
 427                 }
 428         }
 429
 430         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 431         {
 432                 issl_session* session = &sessions[fd];
 433
 434                 if (!session->sess)
 435                 {
 436                         readresult = 0;
 437                         CloseSession(session);
 438                         return 1;
 439                 }
 440
 441                 if (session->status == ISSL_HANDSHAKING)
 442                 {
 443                         if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
 444                         {
 445                                 // The handshake isn't finished and it wants to read, try to finish it.
 446                                 if (!Handshake(session))
 447                                 {
 448                                         // Couldn't resume handshake.
 449                                         return -1;
 450                                 }
 451                         }
 452                         else
 453                         {
 454                                 return -1;
 455                         }
 456                 }
 457
 458                 // If we resumed the handshake then session->status will be ISSL_OPEN
 459
 460                 if (session->status == ISSL_OPEN)
 461                 {
 462                         if (session->wstat == ISSL_READ)
 463                         {
 464                                 if(DoWrite(session) == 0)
 465                                         return 0;
 466                         }
 467
 468                         if (session->rstat == ISSL_READ)
 469                         {
 470                                 int ret = DoRead(session);
 471
 472                                 if (ret > 0)
 473                                 {
 474                                         if (count <= session->inbufoffset)
 475                                         {
 476                                                 memcpy(buffer, session->inbuf, count);
 477                                                 // Move the stuff left in inbuf to the beginning of it
 478                                                 memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
 479                                                 // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
 480                                                 session->inbufoffset -= count;
 481                                                 // Insp uses readresult as the count of how much data there is in buffer, so:
 482                                                 readresult = count;
 483                                         }
 484                                         else
 485                                         {
 486                                                 // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
 487                                                 memcpy(buffer, session->inbuf, session->inbufoffset);
 488
 489                                                 readresult = session->inbufoffset;
 490                                                 // Zero the offset, as there's nothing there..
 491                                                 session->inbufoffset = 0;
 492                                         }
 493
 494                                         return 1;
 495                                 }
 496                                 else
 497                                 {
 498                                         return ret;
 499                                 }
 500                         }
 501                 }
 502
 503                 return -1;
 504         }
 505
 506         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 507         {
 508                 issl_session* session = &sessions[fd];
 509
 510                 if (!session->sess)
 511                 {
 512                         ServerInstance->Log(DEBUG,"BUG: file descriptor %d doesn't have an SSL session attached!", fd);
 513                         CloseSession(session);
 514                         return -1;
 515                 }
 516
 517                 session->outbuf.append(buffer, count);
 518
 519                 ServerInstance->Log(DEBUG,"Buffer now: %s", session->outbuf.c_str());
 520
 521                 if (session->status == ISSL_HANDSHAKING)
 522                 {
 523                         // The handshake isn't finished, try to finish it.
 524                         if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 525                                 Handshake(session);
 526                 }
 527
 528                 if (session->status == ISSL_OPEN)
 529                 {
 530                         ServerInstance->Log(DEBUG,"Session is open, writing to it");
 531                         if (session->rstat == ISSL_WRITE)
 532                                 DoRead(session);
 533
 534                         if (session->wstat == ISSL_WRITE)
 535                                 return DoWrite(session);
 536                 }
 537
 538                 return 1;
 539         }
 540
 541         int DoWrite(issl_session* session)
 542         {
 543                 ServerInstance->Log(DEBUG,"DoWrite called");
 544                 if (!session->outbuf.size())
 545                         return -1;
 546
 547                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 548
 549                 if (ret == 0)
 550                 {
 551                         ServerInstance->Log(DEBUG,"SSL_write returned 0");
 552                         CloseSession(session);
 553                         return 0;
 554                 }
 555                 else if (ret < 0)
 556                 {
 557                         int err = SSL_get_error(session->sess, ret);
 558
 559                         if (err == SSL_ERROR_WANT_WRITE)
 560                         {
 561                                 session->wstat = ISSL_WRITE;
 562                                 return -1;
 563                         }
 564                         else if (err == SSL_ERROR_WANT_READ)
 565                         {
 566                                 session->wstat = ISSL_READ;
 567                                 return -1;
 568                         }
 569                         else
 570                         {
 571                                 char errbuf[1024];
 572                                 ERR_print_errors_fp(stdout);
 573                                 if (err == SSL_ERROR_WANT_CONNECT)
 574                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_WANT_CONNECT");
 575                                 if (err == SSL_ERROR_WANT_ACCEPT)
 576                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_WANT_ACCEPT");
 577                                 if (err == SSL_ERROR_ZERO_RETURN)
 578                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_ZERO_RETURN");
 579                                 if (err == SSL_ERROR_WANT_X509_LOOKUP)
 580                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_WANT_X509_LOOKUP");
 581                                 if (err == SSL_ERROR_SSL)
 582                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_SSL: %s", ERR_error_string(err, errbuf));
 583                                 if (err == SSL_ERROR_SYSCALL)
 584                                         ServerInstance->Log(DEBUG,"Closing in DoWrite() due to error: SSL_ERROR_SYSCALL: %d %s", errno, strerror(errno));
 585
 586                                 CloseSession(session);
 587                                 return 0;
 588                         }
 589                 }
 590                 else
 591                 {
 592                         session->outbuf = session->outbuf.substr(ret);
 593                         return ret;
 594                 }
 595         }
 596
 597         int DoRead(issl_session* session)
 598         {
 599                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 600                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 601
 602                 int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
 603
 604                 if (ret == 0)
 605                 {
 606                         // Client closed connection.
 607                         CloseSession(session);
 608                         return 0;
 609                 }
 610                 else if (ret < 0)
 611                 {
 612                         int err = SSL_get_error(session->sess, ret);
 613
 614                         if (err == SSL_ERROR_WANT_READ)
 615                         {
 616                                 session->rstat = ISSL_READ;
 617                                 return -1;
 618                         }
 619                         else if (err == SSL_ERROR_WANT_WRITE)
 620                         {
 621                                 session->rstat = ISSL_WRITE;
 622                                 return -1;
 623                         }
 624                         else
 625                         {
 626                                 CloseSession(session);
 627                                 return 0;
 628                         }
 629                 }
 630                 else
 631                 {
 632                         // Read successfully 'ret' bytes into inbuf + inbufoffset
 633                         // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
 634                         // 'buffer' is 'count' long
 635
 636                         session->inbufoffset += ret;
 637
 638                         return ret;
 639                 }
 640         }
 641
 642         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 643         virtual void OnWhois(userrec* source, userrec* dest)
 644         {
 645                 // Bugfix, only send this numeric for *our* SSL users
 646                 if (dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 647                 {
 648                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
 649                 }
 650         }
 651
 652         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 653         {
 654                 // check if the linking module wants to know about OUR metadata
 655                 if (extname == "ssl")
 656                 {
 657                         // check if this user has an swhois field to send
 658                         if(user->GetExt(extname, dummy))
 659                         {
 660                                 // call this function in the linking module, let it format the data how it
 661                                 // sees fit, and send it on its way. We dont need or want to know how.
 662                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 663                         }
 664                 }
 665         }
 666
 667         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 668         {
 669                 // check if its our metadata key, and its associated with a user
 670                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 671                 {
 672                         userrec* dest = (userrec*)target;
 673                         // if they dont already have an ssl flag, accept the remote server's
 674                         if (!dest->GetExt(extname, dummy))
 675                         {
 676                                 dest->Extend(extname, "ON");
 677                         }
 678                 }
 679         }
 680
 681         bool Handshake(issl_session* session)
 682         {
 683                 ServerInstance->Log(DEBUG,"Handshake()");
 684                 int ret;
 685
 686                 if (session->outbound)
 687                         ret = SSL_connect(session->sess);
 688                 else
 689                         ret = SSL_accept(session->sess);
 690
 691                 if (ret < 0)
 692                 {
 693                         ServerInstance->Log(DEBUG,"Handshake ret < 0");
 694                         int err = SSL_get_error(session->sess, ret);
 695
 696                         if (err == SSL_ERROR_WANT_READ)
 697                         {
 698                                 ServerInstance->Log(DEBUG,"Handshake want read");
 699                                 session->rstat = ISSL_READ;
 700                                 session->status = ISSL_HANDSHAKING;
 701                         }
 702                         else if (err == SSL_ERROR_WANT_WRITE)
 703                         {
 704                                 ServerInstance->Log(DEBUG,"Handshake want write");
 705                                 session->wstat = ISSL_WRITE;
 706                                 session->status = ISSL_HANDSHAKING;
 707                                 MakePollWrite(session);
 708                         }
 709                         else
 710                         {
 711                                 ServerInstance->Log(DEBUG,"Handshake other error");
 712                                 CloseSession(session);
 713                         }
 714
 715                         return false;
 716                 }
 717                 else if (ret > 0)
 718                 {
 719                         // Handshake complete.
 720                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 721                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 722                         if (u)
 723                         {
 724                                 if (!u->GetExt("ssl", dummy))
 725                                         u->Extend("ssl", "ON");
 726                         }
 727
 728                         session->status = ISSL_OPEN;
 729
 730                         ServerInstance->Log(DEBUG,"Handshake complete, returned %d", ret);
 731
 732                         MakePollWrite(session);
 733
 734                         return true;
 735                 }
 736                 else if (ret == 0)
 737                 {
 738                         int err = SSL_get_error(session->sess, ret);
 739                         ServerInstance->Log(DEBUG,"Handshake generic failure: %d", err);
 740                         ERR_print_errors_fp(stdout);
 741                         CloseSession(session);
 742                         return true;
 743                 }
 744
 745                 return true;
 746         }
 747
 748         virtual void OnPostConnect(userrec* user)
 749         {
 750                 // This occurs AFTER OnUserConnect so we can be sure the
 751                 // protocol module has propogated the NICK message.
 752                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 753                 {
 754                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 755                         std::deque<std::string>* metadata = new std::deque<std::string>;
 756                         metadata->push_back(user->nick);
 757                         metadata->push_back("ssl");             // The metadata id
 758                         metadata->push_back("ON");              // The value to send
 759                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 760                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 761                         DELETE(event);
 762                         DELETE(metadata);
 763
 764                         VerifyCertificate(&sessions[user->GetFd()], user);
 765                 }
 766         }
 767
 768         void MakePollWrite(issl_session* session)
 769         {
 770                 OnRawSocketWrite(session->fd, NULL, 0);
 771         }
 772
 773         void CloseSession(issl_session* session)
 774         {
 775                 if (session->sess)
 776                 {
 777                         SSL_shutdown(session->sess);
 778                         SSL_free(session->sess);
 779                 }
 780
 781                 if (session->inbuf)
 782                 {
 783                         delete[] session->inbuf;
 784                 }
 785
 786                 session->outbuf.clear();
 787                 session->inbuf = NULL;
 788                 session->sess = NULL;
 789                 session->status = ISSL_NONE;
 790         }
 791
 792         void VerifyCertificate(issl_session* session, Extensible* user)
 793         {
 794                 X509* cert;
 795                 ssl_cert* certinfo = new ssl_cert;
 796                 unsigned int n;
 797                 unsigned char md[EVP_MAX_MD_SIZE];
 798                 const EVP_MD *digest = EVP_md5();
 799
 800                 user->Extend("ssl_cert",certinfo);
 801
 802                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 803
 804                 if (!cert)
 805                 {
 806                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 807                         return;
 808                 }
 809
 810                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 811
 812                 if (SelfSigned)
 813                 {
 814                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 815                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 816                 }
 817                 else
 818                 {
 819                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 820                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 821                 }
 822
 823                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 824                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 825
 826                 if (!X509_digest(cert, digest, md, &n))
 827                 {
 828                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 829                 }
 830                 else
 831                 {
 832                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 833                 }
 834
 835                 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))
 836                 {
 837                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 838                 }
 839
 840                 X509_free(cert);
 841         }
 842 };
 843
 844 class ModuleSSLOpenSSLFactory : public ModuleFactory
 845 {
 846  public:
 847         ModuleSSLOpenSSLFactory()
 848         {
 849         }
 850
 851         ~ModuleSSLOpenSSLFactory()
 852         {
 853         }
 854
 855         virtual Module * CreateModule(InspIRCd* Me)
 856         {
 857                 return new ModuleSSLOpenSSL(Me);
 858         }
 859 };
 860
 861
 862 extern "C" void * init_module( void )
 863 {
 864         return new ModuleSSLOpenSSLFactory;
 865 }