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