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