src/modules/extra/m_ssl_openssl.cpp

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