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: -I/usr/include -I/usr/local/include */
  21 /* $LinkerFlags: -L/usr/local/lib -Wl,--rpath -Wl,/usr/local/lib -L/usr/lib -Wl,--rpath -Wl,/usr/lib -lssl */
  22
  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                                 unsigned int port = Conf->ReadInteger("bind", "port", i, true);
 146                                 if (ServerInstance->Config->AddIOHook(port, this))
 147                                 {
 148                                         // We keep a record of which ports we're listening on with SSL
 149                                         listenports.push_back(port);
 150
 151                                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", port);
 152                                 }
 153                                 else
 154                                 {
 155                                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", port);
 156                                 }
 157                         }
 158                 }
 159
 160                 std::string confdir(CONFIG_FILE);
 161                 // +1 so we the path ends with a /
 162                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 163
 164                 cafile  = Conf->ReadValue("openssl", "cafile", 0);
 165                 // crlfile      = Conf->ReadValue("openssl", "crlfile", 0);
 166                 certfile        = Conf->ReadValue("openssl", "certfile", 0);
 167                 keyfile = Conf->ReadValue("openssl", "keyfile", 0);
 168                 dhfile  = Conf->ReadValue("openssl", "dhfile", 0);
 169
 170                 // Set all the default values needed.
 171                 if(cafile == "")
 172                         cafile = "ca.pem";
 173
 174                 //if(crlfile == "")
 175                 //      crlfile = "crl.pem";
 176
 177                 if(certfile == "")
 178                         certfile = "cert.pem";
 179
 180                 if(keyfile == "")
 181                         keyfile = "key.pem";
 182
 183                 if(dhfile == "")
 184                         dhfile = "dhparams.pem";
 185
 186                 // Prepend relative paths with the path to the config directory.
 187                 if(cafile[0] != '/')
 188                         cafile = confdir + cafile;
 189
 190                 //if(crlfile[0] != '/')
 191                 //      crlfile = confdir + crlfile;
 192
 193                 if(certfile[0] != '/')
 194                         certfile = confdir + certfile;
 195
 196                 if(keyfile[0] != '/')
 197                         keyfile = confdir + keyfile;
 198
 199                 if(dhfile[0] != '/')
 200                         dhfile = confdir + dhfile;
 201
 202                 /* Load our keys and certificates*/
 203                 if(!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str()))
 204                 {
 205                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 206                 }
 207
 208                 if(!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))
 209                 {
 210                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 211                 }
 212
 213                 /* Load the CAs we trust*/
 214                 if(!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))
 215                 {
 216                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 217                 }
 218
 219                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 220                 DH* ret;
 221
 222                 if(dhpfile == NULL)
 223                 {
 224                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 225                         throw ModuleException();
 226                 }
 227                 else
 228                 {
 229                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 230
 231                         if(SSL_CTX_set_tmp_dh(ctx, ret) < 0)
 232                         {
 233                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 234                         }
 235                 }
 236
 237                 fclose(dhpfile);
 238
 239                 DELETE(Conf);
 240         }
 241
 242         virtual ~ModuleSSLOpenSSL()
 243         {
 244                 SSL_CTX_free(ctx);
 245                 delete culllist;
 246         }
 247
 248         virtual void OnCleanup(int target_type, void* item)
 249         {
 250                 if(target_type == TYPE_USER)
 251                 {
 252                         userrec* user = (userrec*)item;
 253
 254                         if(user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 255                         {
 256                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 257                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 258                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Adding user %s to cull list", user->nick);
 259                                 culllist->AddItem(user, "SSL module unloading");
 260                         }
 261                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 262                         {
 263                                 ssl_cert* tofree;
 264                                 user->GetExt("ssl_cert", tofree);
 265                                 delete tofree;
 266                                 user->Shrink("ssl_cert");
 267                         }
 268                 }
 269         }
 270
 271         virtual void OnUnloadModule(Module* mod, const std::string &name)
 272         {
 273                 if(mod == this)
 274                 {
 275                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 276                         int numusers = culllist->Apply();
 277                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Killed %d users for unload of OpenSSL SSL module", numusers);
 278
 279                         for(unsigned int i = 0; i < listenports.size(); i++)
 280                                 ServerInstance->Config->DelIOHook(listenports[i]);
 281                 }
 282         }
 283
 284         virtual Version GetVersion()
 285         {
 286                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 287         }
 288
 289         void Implements(char* List)
 290         {
 291                 List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 292                 List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 293         }
 294
 295         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 296         {
 297                 issl_session* session = &sessions[fd];
 298
 299                 session->fd = fd;
 300                 session->inbuf = new char[inbufsize];
 301                 session->inbufoffset = 0;
 302                 session->sess = SSL_new(ctx);
 303                 session->status = ISSL_NONE;
 304
 305                 if(session->sess == NULL)
 306                 {
 307                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 308                         return;
 309                 }
 310
 311                 if(SSL_set_fd(session->sess, fd) == 0)
 312                 {
 313                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 314                         return;
 315                 }
 316
 317                 Handshake(session);
 318         }
 319
 320         virtual void OnRawSocketClose(int fd)
 321         {
 322                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketClose: %d", fd);
 323                 CloseSession(&sessions[fd]);
 324
 325                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 326
 327                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 328                 {
 329                         ssl_cert* tofree;
 330                         user->GetExt("ssl_cert", tofree);
 331                         delete tofree;
 332                         user->Shrink("ssl_cert");
 333                 }
 334         }
 335
 336         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 337         {
 338                 issl_session* session = &sessions[fd];
 339
 340                 if(!session->sess)
 341                 {
 342                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: No session to read from");
 343                         readresult = 0;
 344                         CloseSession(session);
 345                         return 1;
 346                 }
 347
 348                 if(session->status == ISSL_HANDSHAKING)
 349                 {
 350                         if(session->rstat == ISSL_READ || session->wstat == ISSL_READ)
 351                         {
 352                                 // The handshake isn't finished and it wants to read, try to finish it.
 353                                 if(Handshake(session))
 354                                 {
 355                                         // Handshake successfully resumed.
 356                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: successfully resumed handshake");
 357                                 }
 358                                 else
 359                                 {
 360                                         // Couldn't resume handshake.
 361                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: failed to resume handshake");
 362                                         return -1;
 363                                 }
 364                         }
 365                         else
 366                         {
 367                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: handshake wants to write data but we are currently reading");
 368                                 return -1;
 369                         }
 370                 }
 371
 372                 // If we resumed the handshake then session->status will be ISSL_OPEN
 373
 374                 if(session->status == ISSL_OPEN)
 375                 {
 376                         if(session->wstat == ISSL_READ)
 377                         {
 378                                 if(DoWrite(session) == 0)
 379                                         return 0;
 380                         }
 381
 382                         if(session->rstat == ISSL_READ)
 383                         {
 384                                 int ret = DoRead(session);
 385
 386                                 if(ret > 0)
 387                                 {
 388                                         if(count <= session->inbufoffset)
 389                                         {
 390                                                 memcpy(buffer, session->inbuf, count);
 391                                                 // Move the stuff left in inbuf to the beginning of it
 392                                                 memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
 393                                                 // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
 394                                                 session->inbufoffset -= count;
 395                                                 // Insp uses readresult as the count of how much data there is in buffer, so:
 396                                                 readresult = count;
 397                                         }
 398                                         else
 399                                         {
 400                                                 // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
 401                                                 memcpy(buffer, session->inbuf, session->inbufoffset);
 402
 403                                                 readresult = session->inbufoffset;
 404                                                 // Zero the offset, as there's nothing there..
 405                                                 session->inbufoffset = 0;
 406                                         }
 407
 408                                         return 1;
 409                                 }
 410                                 else
 411                                 {
 412                                         return ret;
 413                                 }
 414                         }
 415                 }
 416
 417                 return -1;
 418         }
 419
 420         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 421         {
 422                 issl_session* session = &sessions[fd];
 423
 424                 if(!session->sess)
 425                 {
 426                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: No session to write to");
 427                         CloseSession(session);
 428                         return 1;
 429                 }
 430
 431                 session->outbuf.append(buffer, count);
 432
 433                 if(session->status == ISSL_HANDSHAKING)
 434                 {
 435                         // The handshake isn't finished, try to finish it.
 436                         if(session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 437                         {
 438                                 if(Handshake(session))
 439                                 {
 440                                         // Handshake successfully resumed.
 441                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: successfully resumed handshake");
 442                                 }
 443                                 else
 444                                 {
 445                                         // Couldn't resume handshake.
 446                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: failed to resume handshake");
 447                                 }
 448                         }
 449                         else
 450                         {
 451                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: handshake wants to read data but we are currently writing");
 452                         }
 453                 }
 454
 455                 if(session->status == ISSL_OPEN)
 456                 {
 457                         if(session->rstat == ISSL_WRITE)
 458                         {
 459                                 DoRead(session);
 460                         }
 461
 462                         if(session->wstat == ISSL_WRITE)
 463                         {
 464                                 return DoWrite(session);
 465                         }
 466                 }
 467
 468                 return 1;
 469         }
 470
 471         int DoWrite(issl_session* session)
 472         {
 473                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 474
 475                 if(ret == 0)
 476                 {
 477                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Client closed the connection");
 478                         CloseSession(session);
 479                         return 0;
 480                 }
 481                 else if(ret < 0)
 482                 {
 483                         int err = SSL_get_error(session->sess, ret);
 484
 485                         if(err == SSL_ERROR_WANT_WRITE)
 486                         {
 487                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written, need to retry: %s", get_error());
 488                                 session->wstat = ISSL_WRITE;
 489                                 return -1;
 490                         }
 491                         else if(err == SSL_ERROR_WANT_READ)
 492                         {
 493                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written but the damn thing wants to read instead: %s", get_error());
 494                                 session->wstat = ISSL_READ;
 495                                 return -1;
 496                         }
 497                         else
 498                         {
 499                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Error writing SSL data: %s", get_error());
 500                                 CloseSession(session);
 501                                 return 0;
 502                         }
 503                 }
 504                 else
 505                 {
 506                         session->outbuf = session->outbuf.substr(ret);
 507                         return ret;
 508                 }
 509         }
 510
 511         int DoRead(issl_session* session)
 512         {
 513                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 514                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 515
 516                 int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
 517
 518                 if(ret == 0)
 519                 {
 520                         // Client closed connection.
 521                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Client closed the connection");
 522                         CloseSession(session);
 523                         return 0;
 524                 }
 525                 else if(ret < 0)
 526                 {
 527                         int err = SSL_get_error(session->sess, ret);
 528
 529                         if(err == SSL_ERROR_WANT_READ)
 530                         {
 531                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read, need to retry: %s", get_error());
 532                                 session->rstat = ISSL_READ;
 533                                 return -1;
 534                         }
 535                         else if(err == SSL_ERROR_WANT_WRITE)
 536                         {
 537                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read but the damn thing wants to write instead: %s", get_error());
 538                                 session->rstat = ISSL_WRITE;
 539                                 return -1;
 540                         }
 541                         else
 542                         {
 543                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Error reading SSL data: %s", get_error());
 544                                 CloseSession(session);
 545                                 return 0;
 546                         }
 547                 }
 548                 else
 549                 {
 550                         // Read successfully 'ret' bytes into inbuf + inbufoffset
 551                         // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
 552                         // 'buffer' is 'count' long
 553
 554                         session->inbufoffset += ret;
 555
 556                         return ret;
 557                 }
 558         }
 559
 560         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 561         virtual void OnWhois(userrec* source, userrec* dest)
 562         {
 563                 // Bugfix, only send this numeric for *our* SSL users
 564                 if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 565                 {
 566                         source->WriteServ("320 %s %s :is using a secure connection", source->nick, dest->nick);
 567                 }
 568         }
 569
 570         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 571         {
 572                 // check if the linking module wants to know about OUR metadata
 573                 if(extname == "ssl")
 574                 {
 575                         // check if this user has an swhois field to send
 576                         if(user->GetExt(extname, dummy))
 577                         {
 578                                 // call this function in the linking module, let it format the data how it
 579                                 // sees fit, and send it on its way. We dont need or want to know how.
 580                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 581                         }
 582                 }
 583         }
 584
 585         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 586         {
 587                 // check if its our metadata key, and its associated with a user
 588                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 589                 {
 590                         userrec* dest = (userrec*)target;
 591                         // if they dont already have an ssl flag, accept the remote server's
 592                         if (!dest->GetExt(extname, dummy))
 593                         {
 594                                 dest->Extend(extname, "ON");
 595                         }
 596                 }
 597         }
 598
 599         bool Handshake(issl_session* session)
 600         {
 601                 int ret = SSL_accept(session->sess);
 602
 603                 if(ret < 0)
 604                 {
 605                         int err = SSL_get_error(session->sess, ret);
 606
 607                         if(err == SSL_ERROR_WANT_READ)
 608                         {
 609                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to read again: %s", get_error());
 610                                 session->rstat = ISSL_READ;
 611                                 session->status = ISSL_HANDSHAKING;
 612                         }
 613                         else if(err == SSL_ERROR_WANT_WRITE)
 614                         {
 615                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to write more data: %s", get_error());
 616                                 session->wstat = ISSL_WRITE;
 617                                 session->status = ISSL_HANDSHAKING;
 618                                 MakePollWrite(session);
 619                         }
 620                         else
 621                         {
 622                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Failed, bailing: %s", get_error());
 623                                 CloseSession(session);
 624                         }
 625
 626                         return false;
 627                 }
 628                 else
 629                 {
 630                         // Handshake complete.
 631                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake completed");
 632
 633                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 634                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 635                         if (u)
 636                         {
 637                                 if (!u->GetExt("ssl", dummy))
 638                                         u->Extend("ssl", "ON");
 639                         }
 640
 641                         session->status = ISSL_OPEN;
 642
 643                         MakePollWrite(session);
 644
 645                         return true;
 646                 }
 647         }
 648
 649         virtual void OnPostConnect(userrec* user)
 650         {
 651                 // This occurs AFTER OnUserConnect so we can be sure the
 652                 // protocol module has propogated the NICK message.
 653                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 654                 {
 655                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 656                         std::deque<std::string>* metadata = new std::deque<std::string>;
 657                         metadata->push_back(user->nick);
 658                         metadata->push_back("ssl");             // The metadata id
 659                         metadata->push_back("ON");              // The value to send
 660                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 661                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 662                         DELETE(event);
 663                         DELETE(metadata);
 664
 665                         VerifyCertificate(&sessions[user->GetFd()], user);
 666                 }
 667         }
 668
 669         void MakePollWrite(issl_session* session)
 670         {
 671                 OnRawSocketWrite(session->fd, NULL, 0);
 672         }
 673
 674         void CloseSession(issl_session* session)
 675         {
 676                 if(session->sess)
 677                 {
 678                         SSL_shutdown(session->sess);
 679                         SSL_free(session->sess);
 680                 }
 681
 682                 if(session->inbuf)
 683                 {
 684                         delete[] session->inbuf;
 685                 }
 686
 687                 session->outbuf.clear();
 688                 session->inbuf = NULL;
 689                 session->sess = NULL;
 690                 session->status = ISSL_NONE;
 691         }
 692
 693         void VerifyCertificate(issl_session* session, userrec* user)
 694         {
 695                 X509* cert;
 696                 ssl_cert* certinfo = new ssl_cert;
 697                 unsigned int n;
 698                 unsigned char md[EVP_MAX_MD_SIZE];
 699                 const EVP_MD *digest = EVP_md5();
 700
 701                 user->Extend("ssl_cert",certinfo);
 702
 703                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 704
 705                 if (!cert)
 706                 {
 707                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 708                         return;
 709                 }
 710
 711                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 712
 713                 if (SelfSigned)
 714                 {
 715                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 716                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 717                 }
 718                 else
 719                 {
 720                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 721                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 722                 }
 723
 724                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 725                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 726
 727                 if (!X509_digest(cert, digest, md, &n))
 728                 {
 729                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 730                 }
 731                 else
 732                 {
 733                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 734                 }
 735
 736                 user->WriteServ("NOTICE %s :*** Your SSL Certificate fingerprint is: %s", user->nick, irc::hex(md, n).c_str());
 737
 738                 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))
 739                 {
 740                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 741                 }
 742
 743                 X509_free(cert);
 744         }
 745 };
 746
 747 class ModuleSSLOpenSSLFactory : public ModuleFactory
 748 {
 749  public:
 750         ModuleSSLOpenSSLFactory()
 751         {
 752         }
 753
 754         ~ModuleSSLOpenSSLFactory()
 755         {
 756         }
 757
 758         virtual Module * CreateModule(InspIRCd* Me)
 759         {
 760                 return new ModuleSSLOpenSSL(Me);
 761         }
 762 };
 763
 764
 765 extern "C" void * init_module( void )
 766 {
 767         return new ModuleSSLOpenSSLFactory;
 768 }