src/modules/extra/m_ssl_openssl.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include <string>
  18 #include <vector>
  19
  20 #include <openssl/ssl.h>
  21 #include <openssl/err.h>
  22
  23 #include "inspircd_config.h"
  24 #include "configreader.h"
  25 #include "users.h"
  26 #include "channels.h"
  27 #include "modules.h"
  28
  29 #include "socket.h"
  30 #include "hashcomp.h"
  31 #include "inspircd.h"
  32
  33 #include "transport.h"
  34
  35 /* $ModDesc: Provides SSL support for clients */
  36 /* $CompileFlags: `perl extra/openssl_config.pl compile` */
  37 /* $LinkerFlags: `perl extra/openssl_config.pl link` */
  38 /* $ModDep: transport.h */
  39
  40 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
  41 enum issl_io_status { ISSL_WRITE, ISSL_READ };
  42
  43 static bool SelfSigned = false;
  44
  45 bool isin(int port, const std::vector<int> &portlist)
  46 {
  47         for(unsigned int i = 0; i < portlist.size(); i++)
  48                 if(portlist[i] == port)
  49                         return true;
  50
  51         return false;
  52 }
  53
  54 char* get_error()
  55 {
  56         return ERR_error_string(ERR_get_error(), NULL);
  57 }
  58
  59 /** Represents an SSL user's extra data
  60  */
  61 class issl_session : public classbase
  62 {
  63 public:
  64         SSL* sess;
  65         issl_status status;
  66         issl_io_status rstat;
  67         issl_io_status wstat;
  68
  69         unsigned int inbufoffset;
  70         char* inbuf;                    // Buffer OpenSSL reads into.
  71         std::string outbuf;     // Buffer for outgoing data that OpenSSL will not take.
  72         int fd;
  73
  74         issl_session()
  75         {
  76                 rstat = ISSL_READ;
  77                 wstat = ISSL_WRITE;
  78         }
  79 };
  80
  81 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  82 {
  83         /* XXX: This will allow self signed certificates.
  84          * In the future if we want an option to not allow this,
  85          * we can just return preverify_ok here, and openssl
  86          * will boot off self-signed and invalid peer certs.
  87          */
  88         int ve = X509_STORE_CTX_get_error(ctx);
  89
  90         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  91
  92         return 1;
  93 }
  94
  95 class ModuleSSLOpenSSL : public Module
  96 {
  97
  98         ConfigReader* Conf;
  99
 100         CullList* culllist;
 101
 102         std::vector<int> listenports;
 103
 104         int inbufsize;
 105         issl_session sessions[MAX_DESCRIPTORS];
 106
 107         SSL_CTX* ctx;
 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
 136                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 137
 138                 // Needs the flag as it ignores a plain /rehash
 139                 OnRehash("ssl");
 140         }
 141
 142         virtual void OnRehash(const std::string &param)
 143         {
 144                 if (param != "ssl")
 145                         return;
 146
 147                 Conf = new ConfigReader(ServerInstance);
 148
 149                 for (unsigned int i = 0; i < listenports.size(); i++)
 150                 {
 151                         ServerInstance->Config->DelIOHook(listenports[i]);
 152                 }
 153
 154                 listenports.clear();
 155
 156                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
 157                 {
 158                         // For each <bind> tag
 159                         if (((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "openssl"))
 160                         {
 161                                 // Get the port we're meant to be listening on with SSL
 162                                 std::string port = Conf->ReadValue("bind", "port", i);
 163                                 irc::portparser portrange(port, false);
 164                                 long portno = -1;
 165                                 while ((portno = portrange.GetToken()))
 166                                 {
 167                                         if (ServerInstance->Config->AddIOHook(portno, this))
 168                                         {
 169                                                 listenports.push_back(portno);
 170                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", portno);
 171                                         }
 172                                         else
 173                                         {
 174                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
 175                                         }
 176                                 }
 177                         }
 178                 }
 179
 180                 std::string confdir(CONFIG_FILE);
 181                 // +1 so we the path ends with a /
 182                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 183
 184                 cafile   = Conf->ReadValue("openssl", "cafile", 0);
 185                 certfile = Conf->ReadValue("openssl", "certfile", 0);
 186                 keyfile  = Conf->ReadValue("openssl", "keyfile", 0);
 187                 dhfile   = Conf->ReadValue("openssl", "dhfile", 0);
 188
 189                 // Set all the default values needed.
 190                 if (cafile == "")
 191                         cafile = "ca.pem";
 192
 193                 if (certfile == "")
 194                         certfile = "cert.pem";
 195
 196                 if (keyfile == "")
 197                         keyfile = "key.pem";
 198
 199                 if (dhfile == "")
 200                         dhfile = "dhparams.pem";
 201
 202                 // Prepend relative paths with the path to the config directory.
 203                 if (cafile[0] != '/')
 204                         cafile = confdir + cafile;
 205
 206                 //if(crlfile[0] != '/')
 207                 //      crlfile = confdir + crlfile;
 208
 209                 if (certfile[0] != '/')
 210                         certfile = confdir + certfile;
 211
 212                 if (keyfile[0] != '/')
 213                         keyfile = confdir + keyfile;
 214
 215                 if (dhfile[0] != '/')
 216                         dhfile = confdir + dhfile;
 217
 218                 /* Load our keys and certificates*/
 219                 if (!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str()))
 220                 {
 221                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 222                 }
 223
 224                 if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))
 225                 {
 226                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 227                 }
 228
 229                 /* Load the CAs we trust*/
 230                 if (!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))
 231                 {
 232                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 233                 }
 234
 235                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 236                 DH* ret;
 237
 238                 if (dhpfile == NULL)
 239                 {
 240                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 241                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 242                 }
 243                 else
 244                 {
 245                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 246
 247                         if(SSL_CTX_set_tmp_dh(ctx, ret) < 0)
 248                         {
 249                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 250                         }
 251                 }
 252
 253                 fclose(dhpfile);
 254
 255                 DELETE(Conf);
 256         }
 257
 258         virtual ~ModuleSSLOpenSSL()
 259         {
 260                 SSL_CTX_free(ctx);
 261                 delete culllist;
 262         }
 263
 264         virtual void OnCleanup(int target_type, void* item)
 265         {
 266                 if (target_type == TYPE_USER)
 267                 {
 268                         userrec* user = (userrec*)item;
 269
 270                         if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 271                         {
 272                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 273                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 274                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Adding user %s to cull list", user->nick);
 275                                 culllist->AddItem(user, "SSL module unloading");
 276                         }
 277                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 278                         {
 279                                 ssl_cert* tofree;
 280                                 user->GetExt("ssl_cert", tofree);
 281                                 delete tofree;
 282                                 user->Shrink("ssl_cert");
 283                         }
 284                 }
 285         }
 286
 287         virtual void OnUnloadModule(Module* mod, const std::string &name)
 288         {
 289                 if (mod == this)
 290                 {
 291                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 292                         int numusers = culllist->Apply();
 293                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Killed %d users for unload of OpenSSL SSL module", numusers);
 294
 295                         for(unsigned int i = 0; i < listenports.size(); i++)
 296                                 ServerInstance->Config->DelIOHook(listenports[i]);
 297                 }
 298         }
 299
 300         virtual Version GetVersion()
 301         {
 302                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 303         }
 304
 305         void Implements(char* List)
 306         {
 307                 List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 308                 List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 309         }
 310
 311         virtual char* OnRequest(Request* request)
 312         {
 313                 ISHRequest* ISR = (ISHRequest*)request;
 314                 ServerInstance->Log(DEBUG, "hook OnRequest");
 315                 if (strcmp("IS_NAME", request->GetId()) == 0)
 316                 {
 317                         return "openssl";
 318                 }
 319                 else if (strcmp("IS_HOOK", request->GetId()) == 0)
 320                 {
 321                         char* ret = "OK";
 322                         try
 323                         {
 324                                 ret = ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 325                         }
 326                         catch (ModuleException &e)
 327                         {
 328                                 return NULL;
 329                         }
 330
 331                         return ret;
 332                 }
 333                 else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
 334                 {
 335                         ServerInstance->Log(DEBUG, "Unhooking socket %08x", ISR->Sock);
 336                         return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 337                 }
 338                 else if (strcmp("IS_HSDONE", request->GetId()) == 0)
 339                 {
 340                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 341                         return (session->status == ISSL_HANDSHAKING) ? NULL : (char*)"OK";
 342                 }
 343                 else if (strcmp("IS_ATTACH", request->GetId()) == 0)
 344                 {
 345                         issl_session* session = &sessions[ISR->Sock->GetFd()];
 346                         if (session)
 347                         {
 348                                 VerifyCertificate(session, (InspSocket*)ISR->Sock);
 349                                 return "OK";
 350                         }
 351                 }
 352                 return NULL;
 353         }
 354
 355
 356         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 357         {
 358                 ServerInstance->Log(DEBUG, "Hook accept %d", fd);
 359                 issl_session* session = &sessions[fd];
 360
 361                 session->fd = fd;
 362                 session->inbuf = new char[inbufsize];
 363                 session->inbufoffset = 0;
 364                 session->sess = SSL_new(ctx);
 365                 session->status = ISSL_NONE;
 366
 367                 if (session->sess == NULL)
 368                 {
 369                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 370                         return;
 371                 }
 372
 373                 if (SSL_set_fd(session->sess, fd) == 0)
 374                 {
 375                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 376                         return;
 377                 }
 378
 379                 Handshake(session);
 380         }
 381
 382         virtual void OnRawSocketConnect(int fd)
 383         {
 384                 issl_session* session = &sessions[fd];
 385
 386                 session->fd = fd;
 387                 session->inbuf = new char[inbufsize];
 388                 session->inbufoffset = 0;
 389                 session->sess = SSL_new(ctx);
 390                 session->status = ISSL_NONE;
 391
 392                 if (session->sess == NULL)
 393                 {
 394                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 395                         return;
 396                 }
 397
 398                 if (SSL_set_fd(session->sess, fd) == 0)
 399                 {
 400                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 401                         return;
 402                 }
 403
 404                 Handshake(session);
 405         }
 406
 407         virtual void OnRawSocketClose(int fd)
 408         {
 409                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketClose: %d", fd);
 410                 CloseSession(&sessions[fd]);
 411
 412                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 413
 414                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 415                 {
 416                         ssl_cert* tofree;
 417                         user->GetExt("ssl_cert", tofree);
 418                         delete tofree;
 419                         user->Shrink("ssl_cert");
 420                 }
 421         }
 422
 423         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 424         {
 425                 issl_session* session = &sessions[fd];
 426
 427                 if (!session->sess)
 428                 {
 429                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: No session to read from");
 430                         readresult = 0;
 431                         CloseSession(session);
 432                         return 1;
 433                 }
 434
 435                 if (session->status == ISSL_HANDSHAKING)
 436                 {
 437                         if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
 438                         {
 439                                 // The handshake isn't finished and it wants to read, try to finish it.
 440                                 if (Handshake(session))
 441                                 {
 442                                         // Handshake successfully resumed.
 443                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: successfully resumed handshake");
 444                                 }
 445                                 else
 446                                 {
 447                                         // Couldn't resume handshake.
 448                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: failed to resume handshake");
 449                                         return -1;
 450                                 }
 451                         }
 452                         else
 453                         {
 454                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: handshake wants to write data but we are currently reading");
 455                                 return -1;
 456                         }
 457                 }
 458
 459                 // If we resumed the handshake then session->status will be ISSL_OPEN
 460
 461                 if (session->status == ISSL_OPEN)
 462                 {
 463                         if (session->wstat == ISSL_READ)
 464                         {
 465                                 if(DoWrite(session) == 0)
 466                                         return 0;
 467                         }
 468
 469                         if (session->rstat == ISSL_READ)
 470                         {
 471                                 int ret = DoRead(session);
 472
 473                                 if (ret > 0)
 474                                 {
 475                                         if (count <= session->inbufoffset)
 476                                         {
 477                                                 memcpy(buffer, session->inbuf, count);
 478                                                 // Move the stuff left in inbuf to the beginning of it
 479                                                 memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
 480                                                 // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
 481                                                 session->inbufoffset -= count;
 482                                                 // Insp uses readresult as the count of how much data there is in buffer, so:
 483                                                 readresult = count;
 484                                         }
 485                                         else
 486                                         {
 487                                                 // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
 488                                                 memcpy(buffer, session->inbuf, session->inbufoffset);
 489
 490                                                 readresult = session->inbufoffset;
 491                                                 // Zero the offset, as there's nothing there..
 492                                                 session->inbufoffset = 0;
 493                                         }
 494
 495                                         return 1;
 496                                 }
 497                                 else
 498                                 {
 499                                         return ret;
 500                                 }
 501                         }
 502                 }
 503
 504                 return -1;
 505         }
 506
 507         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 508         {
 509                 issl_session* session = &sessions[fd];
 510
 511                 if (!session->sess)
 512                 {
 513                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: No session to write to");
 514                         CloseSession(session);
 515                         return 1;
 516                 }
 517
 518                 session->outbuf.append(buffer, count);
 519
 520                 if (session->status == ISSL_HANDSHAKING)
 521                 {
 522                         // The handshake isn't finished, try to finish it.
 523                         if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 524                         {
 525                                 if (Handshake(session))
 526                                 {
 527                                         // Handshake successfully resumed.
 528                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: successfully resumed handshake");
 529                                 }
 530                                 else
 531                                 {
 532                                         // Couldn't resume handshake.
 533                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: failed to resume handshake");
 534                                 }
 535                         }
 536                         else
 537                         {
 538                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: handshake wants to read data but we are currently writing");
 539                         }
 540                 }
 541
 542                 if (session->status == ISSL_OPEN)
 543                 {
 544                         if (session->rstat == ISSL_WRITE)
 545                         {
 546                                 DoRead(session);
 547                         }
 548
 549                         if (session->wstat == ISSL_WRITE)
 550                         {
 551                                 return DoWrite(session);
 552                         }
 553                 }
 554
 555                 return 1;
 556         }
 557
 558         int DoWrite(issl_session* session)
 559         {
 560                 if (!session->outbuf.size())
 561                         return -1;
 562
 563                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: To write: %d", session->outbuf.size());
 564                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 565
 566                 if (ret == 0)
 567                 {
 568                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Client closed the connection");
 569                         CloseSession(session);
 570                         return 0;
 571                 }
 572                 else if (ret < 0)
 573                 {
 574                         int err = SSL_get_error(session->sess, ret);
 575
 576                         if (err == SSL_ERROR_WANT_WRITE)
 577                         {
 578                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written, need to retry: %s", get_error());
 579                                 session->wstat = ISSL_WRITE;
 580                                 return -1;
 581                         }
 582                         else if (err == SSL_ERROR_WANT_READ)
 583                         {
 584                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written but the damn thing wants to read instead: %s", get_error());
 585                                 session->wstat = ISSL_READ;
 586                                 return -1;
 587                         }
 588                         else
 589                         {
 590                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Error writing SSL data: %s", get_error());
 591                                 CloseSession(session);
 592                                 return 0;
 593                         }
 594                 }
 595                 else
 596                 {
 597                         session->outbuf = session->outbuf.substr(ret);
 598                         return ret;
 599                 }
 600         }
 601
 602         int DoRead(issl_session* session)
 603         {
 604                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 605                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 606
 607                 int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
 608
 609                 if (ret == 0)
 610                 {
 611                         // Client closed connection.
 612                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Client closed the connection");
 613                         CloseSession(session);
 614                         return 0;
 615                 }
 616                 else if (ret < 0)
 617                 {
 618                         int err = SSL_get_error(session->sess, ret);
 619
 620                         if (err == SSL_ERROR_WANT_READ)
 621                         {
 622                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read, need to retry: %s", get_error());
 623                                 session->rstat = ISSL_READ;
 624                                 return -1;
 625                         }
 626                         else if (err == SSL_ERROR_WANT_WRITE)
 627                         {
 628                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read but the damn thing wants to write instead: %s", get_error());
 629                                 session->rstat = ISSL_WRITE;
 630                                 return -1;
 631                         }
 632                         else
 633                         {
 634                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Error reading SSL data: %s", get_error());
 635                                 CloseSession(session);
 636                                 return 0;
 637                         }
 638                 }
 639                 else
 640                 {
 641                         // Read successfully 'ret' bytes into inbuf + inbufoffset
 642                         // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
 643                         // 'buffer' is 'count' long
 644
 645                         session->inbufoffset += ret;
 646
 647                         return ret;
 648                 }
 649         }
 650
 651         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 652         virtual void OnWhois(userrec* source, userrec* dest)
 653         {
 654                 // Bugfix, only send this numeric for *our* SSL users
 655                 if (dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 656                 {
 657                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
 658                 }
 659         }
 660
 661         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 662         {
 663                 // check if the linking module wants to know about OUR metadata
 664                 if (extname == "ssl")
 665                 {
 666                         // check if this user has an swhois field to send
 667                         if(user->GetExt(extname, dummy))
 668                         {
 669                                 // call this function in the linking module, let it format the data how it
 670                                 // sees fit, and send it on its way. We dont need or want to know how.
 671                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 672                         }
 673                 }
 674         }
 675
 676         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 677         {
 678                 // check if its our metadata key, and its associated with a user
 679                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 680                 {
 681                         userrec* dest = (userrec*)target;
 682                         // if they dont already have an ssl flag, accept the remote server's
 683                         if (!dest->GetExt(extname, dummy))
 684                         {
 685                                 dest->Extend(extname, "ON");
 686                         }
 687                 }
 688         }
 689
 690         bool Handshake(issl_session* session)
 691         {
 692                 int ret = SSL_accept(session->sess);
 693
 694                 if (ret < 0)
 695                 {
 696                         int err = SSL_get_error(session->sess, ret);
 697
 698                         if (err == SSL_ERROR_WANT_READ)
 699                         {
 700                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to read again: %s", get_error());
 701                                 session->rstat = ISSL_READ;
 702                                 session->status = ISSL_HANDSHAKING;
 703                         }
 704                         else if (err == SSL_ERROR_WANT_WRITE)
 705                         {
 706                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to write more data: %s", get_error());
 707                                 session->wstat = ISSL_WRITE;
 708                                 session->status = ISSL_HANDSHAKING;
 709                                 MakePollWrite(session);
 710                         }
 711                         else
 712                         {
 713                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Failed, bailing: %s", get_error());
 714                                 CloseSession(session);
 715                         }
 716
 717                         return false;
 718                 }
 719                 else
 720                 {
 721                         // Handshake complete.
 722                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake completed");
 723
 724                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 725                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 726                         if (u)
 727                         {
 728                                 if (!u->GetExt("ssl", dummy))
 729                                         u->Extend("ssl", "ON");
 730                         }
 731
 732                         session->status = ISSL_OPEN;
 733
 734                         MakePollWrite(session);
 735
 736                         return true;
 737                 }
 738         }
 739
 740         virtual void OnPostConnect(userrec* user)
 741         {
 742                 // This occurs AFTER OnUserConnect so we can be sure the
 743                 // protocol module has propogated the NICK message.
 744                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 745                 {
 746                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 747                         std::deque<std::string>* metadata = new std::deque<std::string>;
 748                         metadata->push_back(user->nick);
 749                         metadata->push_back("ssl");             // The metadata id
 750                         metadata->push_back("ON");              // The value to send
 751                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 752                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 753                         DELETE(event);
 754                         DELETE(metadata);
 755
 756                         VerifyCertificate(&sessions[user->GetFd()], user);
 757                 }
 758         }
 759
 760         void MakePollWrite(issl_session* session)
 761         {
 762                 OnRawSocketWrite(session->fd, NULL, 0);
 763         }
 764
 765         void CloseSession(issl_session* session)
 766         {
 767                 if (session->sess)
 768                 {
 769                         SSL_shutdown(session->sess);
 770                         SSL_free(session->sess);
 771                 }
 772
 773                 if (session->inbuf)
 774                 {
 775                         delete[] session->inbuf;
 776                 }
 777
 778                 session->outbuf.clear();
 779                 session->inbuf = NULL;
 780                 session->sess = NULL;
 781                 session->status = ISSL_NONE;
 782         }
 783
 784         void VerifyCertificate(issl_session* session, Extensible* user)
 785         {
 786                 X509* cert;
 787                 ssl_cert* certinfo = new ssl_cert;
 788                 unsigned int n;
 789                 unsigned char md[EVP_MAX_MD_SIZE];
 790                 const EVP_MD *digest = EVP_md5();
 791
 792                 user->Extend("ssl_cert",certinfo);
 793
 794                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 795
 796                 if (!cert)
 797                 {
 798                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 799                         return;
 800                 }
 801
 802                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 803
 804                 if (SelfSigned)
 805                 {
 806                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 807                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 808                 }
 809                 else
 810                 {
 811                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 812                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 813                 }
 814
 815                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 816                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 817
 818                 if (!X509_digest(cert, digest, md, &n))
 819                 {
 820                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 821                 }
 822                 else
 823                 {
 824                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 825                 }
 826
 827                 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))
 828                 {
 829                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 830                 }
 831
 832                 X509_free(cert);
 833         }
 834 };
 835
 836 class ModuleSSLOpenSSLFactory : public ModuleFactory
 837 {
 838  public:
 839         ModuleSSLOpenSSLFactory()
 840         {
 841         }
 842
 843         ~ModuleSSLOpenSSLFactory()
 844         {
 845         }
 846
 847         virtual Module * CreateModule(InspIRCd* Me)
 848         {
 849                 return new ModuleSSLOpenSSL(Me);
 850         }
 851 };
 852
 853
 854 extern "C" void * init_module( void )
 855 {
 856         return new ModuleSSLOpenSSLFactory;
 857 }