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.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.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                 ServerInstance->PublishInterface("InspSocketHook", this);
 110
 111                 // Not rehashable...because I cba to reduce all the sizes of existing buffers.
 112                 inbufsize = ServerInstance->Config->NetBufferSize;
 113
 114                 /* Global SSL library initialization*/
 115                 SSL_library_init();
 116                 SSL_load_error_strings();
 117
 118                 /* Build our SSL context*/
 119                 ctx = SSL_CTX_new( SSLv23_server_method() );
 120
 121                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 122
 123                 // Needs the flag as it ignores a plain /rehash
 124                 OnRehash("ssl");
 125         }
 126
 127         virtual void OnRehash(const std::string &param)
 128         {
 129                 if (param != "ssl")
 130                         return;
 131
 132                 Conf = new ConfigReader(ServerInstance);
 133
 134                 for (unsigned int i = 0; i < listenports.size(); i++)
 135                 {
 136                         ServerInstance->Config->DelIOHook(listenports[i]);
 137                 }
 138
 139                 listenports.clear();
 140
 141                 for (int i = 0; i < Conf->Enumerate("bind"); i++)
 142                 {
 143                         // For each <bind> tag
 144                         if (((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "openssl"))
 145                         {
 146                                 // Get the port we're meant to be listening on with SSL
 147                                 std::string port = Conf->ReadValue("bind", "port", i);
 148                                 irc::portparser portrange(port, false);
 149                                 long portno = -1;
 150                                 while ((portno = portrange.GetToken()))
 151                                 {
 152                                         if (ServerInstance->Config->AddIOHook(portno, this))
 153                                         {
 154                                                 listenports.push_back(portno);
 155                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", portno);
 156                                         }
 157                                         else
 158                                         {
 159                                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", portno);
 160                                         }
 161                                 }
 162                         }
 163                 }
 164
 165                 std::string confdir(CONFIG_FILE);
 166                 // +1 so we the path ends with a /
 167                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 168
 169                 cafile   = Conf->ReadValue("openssl", "cafile", 0);
 170                 certfile = Conf->ReadValue("openssl", "certfile", 0);
 171                 keyfile  = Conf->ReadValue("openssl", "keyfile", 0);
 172                 dhfile   = Conf->ReadValue("openssl", "dhfile", 0);
 173
 174                 // Set all the default values needed.
 175                 if (cafile == "")
 176                         cafile = "ca.pem";
 177
 178                 if (certfile == "")
 179                         certfile = "cert.pem";
 180
 181                 if (keyfile == "")
 182                         keyfile = "key.pem";
 183
 184                 if (dhfile == "")
 185                         dhfile = "dhparams.pem";
 186
 187                 // Prepend relative paths with the path to the config directory.
 188                 if (cafile[0] != '/')
 189                         cafile = confdir + cafile;
 190
 191                 //if(crlfile[0] != '/')
 192                 //      crlfile = confdir + crlfile;
 193
 194                 if (certfile[0] != '/')
 195                         certfile = confdir + certfile;
 196
 197                 if (keyfile[0] != '/')
 198                         keyfile = confdir + keyfile;
 199
 200                 if (dhfile[0] != '/')
 201                         dhfile = confdir + dhfile;
 202
 203                 /* Load our keys and certificates*/
 204                 if (!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str()))
 205                 {
 206                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 207                 }
 208
 209                 if (!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))
 210                 {
 211                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 212                 }
 213
 214                 /* Load the CAs we trust*/
 215                 if (!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))
 216                 {
 217                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 218                 }
 219
 220                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 221                 DH* ret;
 222
 223                 if (dhpfile == NULL)
 224                 {
 225                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 226                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 227                 }
 228                 else
 229                 {
 230                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 231
 232                         if(SSL_CTX_set_tmp_dh(ctx, ret) < 0)
 233                         {
 234                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 235                         }
 236                 }
 237
 238                 fclose(dhpfile);
 239
 240                 DELETE(Conf);
 241         }
 242
 243         virtual ~ModuleSSLOpenSSL()
 244         {
 245                 SSL_CTX_free(ctx);
 246                 delete culllist;
 247         }
 248
 249         virtual void OnCleanup(int target_type, void* item)
 250         {
 251                 if (target_type == TYPE_USER)
 252                 {
 253                         userrec* user = (userrec*)item;
 254
 255                         if (user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 256                         {
 257                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 258                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 259                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Adding user %s to cull list", user->nick);
 260                                 culllist->AddItem(user, "SSL module unloading");
 261                         }
 262                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 263                         {
 264                                 ssl_cert* tofree;
 265                                 user->GetExt("ssl_cert", tofree);
 266                                 delete tofree;
 267                                 user->Shrink("ssl_cert");
 268                         }
 269                 }
 270         }
 271
 272         virtual void OnUnloadModule(Module* mod, const std::string &name)
 273         {
 274                 if (mod == this)
 275                 {
 276                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 277                         int numusers = culllist->Apply();
 278                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Killed %d users for unload of OpenSSL SSL module", numusers);
 279
 280                         for(unsigned int i = 0; i < listenports.size(); i++)
 281                                 ServerInstance->Config->DelIOHook(listenports[i]);
 282                 }
 283         }
 284
 285         virtual Version GetVersion()
 286         {
 287                 return Version(1, 1, 0, 0, VF_VENDOR, API_VERSION);
 288         }
 289
 290         void Implements(char* List)
 291         {
 292                 List[I_OnRawSocketConnect] = List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 293                 List[I_OnRequest] = List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 294         }
 295
 296         virtual char* OnRequest(Request* request)
 297         {
 298                 ISHRequest* ISR = (ISHRequest*)request;
 299                 if (strcmp("IS_NAME", request->GetId()) == 0)
 300                 {
 301                         return "openssl";
 302                 }
 303                 else if (strcmp("IS_HOOK", request->GetId()) == 0)
 304                 {
 305                         return ServerInstance->Config->AddIOHook((Module*)this, (InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 306                 }
 307                 else if (strcmp("IS_UNHOOK", request->GetId()) == 0)
 308                 {
 309                         return ServerInstance->Config->DelIOHook((InspSocket*)ISR->Sock) ? (char*)"OK" : NULL;
 310                 }
 311                 return NULL;
 312         }
 313
 314
 315         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 316         {
 317                 issl_session* session = &sessions[fd];
 318
 319                 session->fd = fd;
 320                 session->inbuf = new char[inbufsize];
 321                 session->inbufoffset = 0;
 322                 session->sess = SSL_new(ctx);
 323                 session->status = ISSL_NONE;
 324
 325                 if (session->sess == NULL)
 326                 {
 327                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 328                         return;
 329                 }
 330
 331                 if (SSL_set_fd(session->sess, fd) == 0)
 332                 {
 333                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 334                         return;
 335                 }
 336
 337                 Handshake(session);
 338         }
 339
 340         virtual void OnRawSocketConnect(int fd)
 341         {
 342                 issl_session* session = &sessions[fd];
 343
 344                 session->fd = fd;
 345                 session->inbuf = new char[inbufsize];
 346                 session->inbufoffset = 0;
 347                 session->sess = SSL_new(ctx);
 348                 session->status = ISSL_NONE;
 349
 350                 if (session->sess == NULL)
 351                 {
 352                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 353                         return;
 354                 }
 355
 356                 if (SSL_set_fd(session->sess, fd) == 0)
 357                 {
 358                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 359                         return;
 360                 }
 361
 362                 Handshake(session);
 363         }
 364
 365         virtual void OnRawSocketClose(int fd)
 366         {
 367                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketClose: %d", fd);
 368                 CloseSession(&sessions[fd]);
 369
 370                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 371
 372                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 373                 {
 374                         ssl_cert* tofree;
 375                         user->GetExt("ssl_cert", tofree);
 376                         delete tofree;
 377                         user->Shrink("ssl_cert");
 378                 }
 379         }
 380
 381         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 382         {
 383                 issl_session* session = &sessions[fd];
 384
 385                 if (!session->sess)
 386                 {
 387                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: No session to read from");
 388                         readresult = 0;
 389                         CloseSession(session);
 390                         return 1;
 391                 }
 392
 393                 if (session->status == ISSL_HANDSHAKING)
 394                 {
 395                         if (session->rstat == ISSL_READ || session->wstat == ISSL_READ)
 396                         {
 397                                 // The handshake isn't finished and it wants to read, try to finish it.
 398                                 if (Handshake(session))
 399                                 {
 400                                         // Handshake successfully resumed.
 401                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: successfully resumed handshake");
 402                                 }
 403                                 else
 404                                 {
 405                                         // Couldn't resume handshake.
 406                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: failed to resume handshake");
 407                                         return -1;
 408                                 }
 409                         }
 410                         else
 411                         {
 412                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: handshake wants to write data but we are currently reading");
 413                                 return -1;
 414                         }
 415                 }
 416
 417                 // If we resumed the handshake then session->status will be ISSL_OPEN
 418
 419                 if (session->status == ISSL_OPEN)
 420                 {
 421                         if (session->wstat == ISSL_READ)
 422                         {
 423                                 if(DoWrite(session) == 0)
 424                                         return 0;
 425                         }
 426
 427                         if (session->rstat == ISSL_READ)
 428                         {
 429                                 int ret = DoRead(session);
 430
 431                                 if (ret > 0)
 432                                 {
 433                                         if (count <= session->inbufoffset)
 434                                         {
 435                                                 memcpy(buffer, session->inbuf, count);
 436                                                 // Move the stuff left in inbuf to the beginning of it
 437                                                 memcpy(session->inbuf, session->inbuf + count, (session->inbufoffset - count));
 438                                                 // Now we need to set session->inbufoffset to the amount of data still waiting to be handed to insp.
 439                                                 session->inbufoffset -= count;
 440                                                 // Insp uses readresult as the count of how much data there is in buffer, so:
 441                                                 readresult = count;
 442                                         }
 443                                         else
 444                                         {
 445                                                 // There's not as much in the inbuf as there is space in the buffer, so just copy the whole thing.
 446                                                 memcpy(buffer, session->inbuf, session->inbufoffset);
 447
 448                                                 readresult = session->inbufoffset;
 449                                                 // Zero the offset, as there's nothing there..
 450                                                 session->inbufoffset = 0;
 451                                         }
 452
 453                                         return 1;
 454                                 }
 455                                 else
 456                                 {
 457                                         return ret;
 458                                 }
 459                         }
 460                 }
 461
 462                 return -1;
 463         }
 464
 465         virtual int OnRawSocketWrite(int fd, const char* buffer, int count)
 466         {
 467                 issl_session* session = &sessions[fd];
 468
 469                 if (!session->sess)
 470                 {
 471                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: No session to write to");
 472                         CloseSession(session);
 473                         return 1;
 474                 }
 475
 476                 session->outbuf.append(buffer, count);
 477
 478                 if (session->status == ISSL_HANDSHAKING)
 479                 {
 480                         // The handshake isn't finished, try to finish it.
 481                         if (session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 482                         {
 483                                 if (Handshake(session))
 484                                 {
 485                                         // Handshake successfully resumed.
 486                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: successfully resumed handshake");
 487                                 }
 488                                 else
 489                                 {
 490                                         // Couldn't resume handshake.
 491                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: failed to resume handshake");
 492                                 }
 493                         }
 494                         else
 495                         {
 496                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: handshake wants to read data but we are currently writing");
 497                         }
 498                 }
 499
 500                 if (session->status == ISSL_OPEN)
 501                 {
 502                         if (session->rstat == ISSL_WRITE)
 503                         {
 504                                 DoRead(session);
 505                         }
 506
 507                         if (session->wstat == ISSL_WRITE)
 508                         {
 509                                 return DoWrite(session);
 510                         }
 511                 }
 512
 513                 return 1;
 514         }
 515
 516         int DoWrite(issl_session* session)
 517         {
 518                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 519
 520                 if (ret == 0)
 521                 {
 522                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Client closed the connection");
 523                         CloseSession(session);
 524                         return 0;
 525                 }
 526                 else if (ret < 0)
 527                 {
 528                         int err = SSL_get_error(session->sess, ret);
 529
 530                         if (err == SSL_ERROR_WANT_WRITE)
 531                         {
 532                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written, need to retry: %s", get_error());
 533                                 session->wstat = ISSL_WRITE;
 534                                 return -1;
 535                         }
 536                         else if (err == SSL_ERROR_WANT_READ)
 537                         {
 538                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written but the damn thing wants to read instead: %s", get_error());
 539                                 session->wstat = ISSL_READ;
 540                                 return -1;
 541                         }
 542                         else
 543                         {
 544                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Error writing SSL data: %s", get_error());
 545                                 CloseSession(session);
 546                                 return 0;
 547                         }
 548                 }
 549                 else
 550                 {
 551                         session->outbuf = session->outbuf.substr(ret);
 552                         return ret;
 553                 }
 554         }
 555
 556         int DoRead(issl_session* session)
 557         {
 558                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 559                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 560
 561                 int ret = SSL_read(session->sess, session->inbuf + session->inbufoffset, inbufsize - session->inbufoffset);
 562
 563                 if (ret == 0)
 564                 {
 565                         // Client closed connection.
 566                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Client closed the connection");
 567                         CloseSession(session);
 568                         return 0;
 569                 }
 570                 else if (ret < 0)
 571                 {
 572                         int err = SSL_get_error(session->sess, ret);
 573
 574                         if (err == SSL_ERROR_WANT_READ)
 575                         {
 576                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read, need to retry: %s", get_error());
 577                                 session->rstat = ISSL_READ;
 578                                 return -1;
 579                         }
 580                         else if (err == SSL_ERROR_WANT_WRITE)
 581                         {
 582                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Not all SSL data read but the damn thing wants to write instead: %s", get_error());
 583                                 session->rstat = ISSL_WRITE;
 584                                 return -1;
 585                         }
 586                         else
 587                         {
 588                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Error reading SSL data: %s", get_error());
 589                                 CloseSession(session);
 590                                 return 0;
 591                         }
 592                 }
 593                 else
 594                 {
 595                         // Read successfully 'ret' bytes into inbuf + inbufoffset
 596                         // There are 'ret' + 'inbufoffset' bytes of data in 'inbuf'
 597                         // 'buffer' is 'count' long
 598
 599                         session->inbufoffset += ret;
 600
 601                         return ret;
 602                 }
 603         }
 604
 605         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 606         virtual void OnWhois(userrec* source, userrec* dest)
 607         {
 608                 // Bugfix, only send this numeric for *our* SSL users
 609                 if (dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 610                 {
 611                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick, dest->nick);
 612                 }
 613         }
 614
 615         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 616         {
 617                 // check if the linking module wants to know about OUR metadata
 618                 if (extname == "ssl")
 619                 {
 620                         // check if this user has an swhois field to send
 621                         if(user->GetExt(extname, dummy))
 622                         {
 623                                 // call this function in the linking module, let it format the data how it
 624                                 // sees fit, and send it on its way. We dont need or want to know how.
 625                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 626                         }
 627                 }
 628         }
 629
 630         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 631         {
 632                 // check if its our metadata key, and its associated with a user
 633                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 634                 {
 635                         userrec* dest = (userrec*)target;
 636                         // if they dont already have an ssl flag, accept the remote server's
 637                         if (!dest->GetExt(extname, dummy))
 638                         {
 639                                 dest->Extend(extname, "ON");
 640                         }
 641                 }
 642         }
 643
 644         bool Handshake(issl_session* session)
 645         {
 646                 int ret = SSL_accept(session->sess);
 647
 648                 if (ret < 0)
 649                 {
 650                         int err = SSL_get_error(session->sess, ret);
 651
 652                         if (err == SSL_ERROR_WANT_READ)
 653                         {
 654                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to read again: %s", get_error());
 655                                 session->rstat = ISSL_READ;
 656                                 session->status = ISSL_HANDSHAKING;
 657                         }
 658                         else if (err == SSL_ERROR_WANT_WRITE)
 659                         {
 660                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to write more data: %s", get_error());
 661                                 session->wstat = ISSL_WRITE;
 662                                 session->status = ISSL_HANDSHAKING;
 663                                 MakePollWrite(session);
 664                         }
 665                         else
 666                         {
 667                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Failed, bailing: %s", get_error());
 668                                 CloseSession(session);
 669                         }
 670
 671                         return false;
 672                 }
 673                 else
 674                 {
 675                         // Handshake complete.
 676                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake completed");
 677
 678                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 679                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 680                         if (u)
 681                         {
 682                                 if (!u->GetExt("ssl", dummy))
 683                                         u->Extend("ssl", "ON");
 684                         }
 685
 686                         session->status = ISSL_OPEN;
 687
 688                         MakePollWrite(session);
 689
 690                         return true;
 691                 }
 692         }
 693
 694         virtual void OnPostConnect(userrec* user)
 695         {
 696                 // This occurs AFTER OnUserConnect so we can be sure the
 697                 // protocol module has propogated the NICK message.
 698                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 699                 {
 700                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 701                         std::deque<std::string>* metadata = new std::deque<std::string>;
 702                         metadata->push_back(user->nick);
 703                         metadata->push_back("ssl");             // The metadata id
 704                         metadata->push_back("ON");              // The value to send
 705                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 706                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 707                         DELETE(event);
 708                         DELETE(metadata);
 709
 710                         VerifyCertificate(&sessions[user->GetFd()], user);
 711                 }
 712         }
 713
 714         void MakePollWrite(issl_session* session)
 715         {
 716                 OnRawSocketWrite(session->fd, NULL, 0);
 717         }
 718
 719         void CloseSession(issl_session* session)
 720         {
 721                 if (session->sess)
 722                 {
 723                         SSL_shutdown(session->sess);
 724                         SSL_free(session->sess);
 725                 }
 726
 727                 if (session->inbuf)
 728                 {
 729                         delete[] session->inbuf;
 730                 }
 731
 732                 session->outbuf.clear();
 733                 session->inbuf = NULL;
 734                 session->sess = NULL;
 735                 session->status = ISSL_NONE;
 736         }
 737
 738         void VerifyCertificate(issl_session* session, Extensible* user)
 739         {
 740                 X509* cert;
 741                 ssl_cert* certinfo = new ssl_cert;
 742                 unsigned int n;
 743                 unsigned char md[EVP_MAX_MD_SIZE];
 744                 const EVP_MD *digest = EVP_md5();
 745
 746                 user->Extend("ssl_cert",certinfo);
 747
 748                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 749
 750                 if (!cert)
 751                 {
 752                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 753                         return;
 754                 }
 755
 756                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 757
 758                 if (SelfSigned)
 759                 {
 760                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 761                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 762                 }
 763                 else
 764                 {
 765                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 766                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 767                 }
 768
 769                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 770                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 771
 772                 if (!X509_digest(cert, digest, md, &n))
 773                 {
 774                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 775                 }
 776                 else
 777                 {
 778                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 779                 }
 780
 781                 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))
 782                 {
 783                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 784                 }
 785
 786                 X509_free(cert);
 787         }
 788 };
 789
 790 class ModuleSSLOpenSSLFactory : public ModuleFactory
 791 {
 792  public:
 793         ModuleSSLOpenSSLFactory()
 794         {
 795         }
 796
 797         ~ModuleSSLOpenSSLFactory()
 798         {
 799         }
 800
 801         virtual Module * CreateModule(InspIRCd* Me)
 802         {
 803                 return new ModuleSSLOpenSSL(Me);
 804         }
 805 };
 806
 807
 808 extern "C" void * init_module( void )
 809 {
 810         return new ModuleSSLOpenSSLFactory;
 811 }