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