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 class issl_session : public classbase
  45 {
  46 public:
  47         SSL* sess;
  48         issl_status status;
  49         issl_io_status rstat;
  50         issl_io_status wstat;
  51
  52         unsigned int inbufoffset;
  53         char* inbuf;                    // Buffer OpenSSL reads into.
  54         std::string outbuf;     // Buffer for outgoing data that OpenSSL will not take.
  55         int fd;
  56
  57         issl_session()
  58         {
  59                 rstat = ISSL_READ;
  60                 wstat = ISSL_WRITE;
  61         }
  62 };
  63
  64 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  65 {
  66         /* XXX: This will allow self signed certificates.
  67          * In the future if we want an option to not allow this,
  68          * we can just return preverify_ok here, and openssl
  69          * will boot off self-signed and invalid peer certs.
  70          */
  71         int ve = X509_STORE_CTX_get_error(ctx);
  72
  73         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  74
  75         return 1;
  76 }
  77
  78 class ModuleSSLOpenSSL : public Module
  79 {
  80
  81         ConfigReader* Conf;
  82
  83         CullList* culllist;
  84
  85         std::vector<int> listenports;
  86
  87         int inbufsize;
  88         issl_session sessions[MAX_DESCRIPTORS];
  89
  90         SSL_CTX* ctx;
  91
  92         char* dummy;
  93
  94         std::string keyfile;
  95         std::string certfile;
  96         std::string cafile;
  97         // std::string crlfile;
  98         std::string dhfile;
  99
 100  public:
 101
 102         ModuleSSLOpenSSL(InspIRCd* Me)
 103                 : Module::Module(Me)
 104         {
 105                 culllist = new CullList(ServerInstance);
 106
 107                 // Not rehashable...because I cba to reduce all the sizes of existing buffers.
 108                 inbufsize = ServerInstance->Config->NetBufferSize;
 109
 110                 /* Global SSL library initialization*/
 111                 SSL_library_init();
 112                 SSL_load_error_strings();
 113
 114                 /* Build our SSL context*/
 115                 ctx = SSL_CTX_new( SSLv23_server_method() );
 116
 117                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 118
 119                 // Needs the flag as it ignores a plain /rehash
 120                 OnRehash("ssl");
 121         }
 122
 123         virtual void OnRehash(const std::string &param)
 124         {
 125                 if(param != "ssl")
 126                         return;
 127
 128                 Conf = new ConfigReader(ServerInstance);
 129
 130                 for(unsigned int i = 0; i < listenports.size(); i++)
 131                 {
 132                         ServerInstance->Config->DelIOHook(listenports[i]);
 133                 }
 134
 135                 listenports.clear();
 136
 137                 for(int i = 0; i < Conf->Enumerate("bind"); i++)
 138                 {
 139                         // For each <bind> tag
 140                         if(((Conf->ReadValue("bind", "type", i) == "") || (Conf->ReadValue("bind", "type", i) == "clients")) && (Conf->ReadValue("bind", "ssl", i) == "openssl"))
 141                         {
 142                                 // Get the port we're meant to be listening on with SSL
 143                                 unsigned int port = Conf->ReadInteger("bind", "port", i, true);
 144                                 if (ServerInstance->Config->AddIOHook(port, this))
 145                                 {
 146                                         // We keep a record of which ports we're listening on with SSL
 147                                         listenports.push_back(port);
 148
 149                                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %d", port);
 150                                 }
 151                                 else
 152                                 {
 153                                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: FAILED to enable SSL on port %d, maybe you have another ssl or similar module loaded?", port);
 154                                 }
 155                         }
 156                 }
 157
 158                 std::string confdir(CONFIG_FILE);
 159                 // +1 so we the path ends with a /
 160                 confdir = confdir.substr(0, confdir.find_last_of('/') + 1);
 161
 162                 cafile  = Conf->ReadValue("openssl", "cafile", 0);
 163                 // crlfile      = Conf->ReadValue("openssl", "crlfile", 0);
 164                 certfile        = Conf->ReadValue("openssl", "certfile", 0);
 165                 keyfile = Conf->ReadValue("openssl", "keyfile", 0);
 166                 dhfile  = Conf->ReadValue("openssl", "dhfile", 0);
 167
 168                 // Set all the default values needed.
 169                 if(cafile == "")
 170                         cafile = "ca.pem";
 171
 172                 //if(crlfile == "")
 173                 //      crlfile = "crl.pem";
 174
 175                 if(certfile == "")
 176                         certfile = "cert.pem";
 177
 178                 if(keyfile == "")
 179                         keyfile = "key.pem";
 180
 181                 if(dhfile == "")
 182                         dhfile = "dhparams.pem";
 183
 184                 // Prepend relative paths with the path to the config directory.
 185                 if(cafile[0] != '/')
 186                         cafile = confdir + cafile;
 187
 188                 //if(crlfile[0] != '/')
 189                 //      crlfile = confdir + crlfile;
 190
 191                 if(certfile[0] != '/')
 192                         certfile = confdir + certfile;
 193
 194                 if(keyfile[0] != '/')
 195                         keyfile = confdir + keyfile;
 196
 197                 if(dhfile[0] != '/')
 198                         dhfile = confdir + dhfile;
 199
 200                 /* Load our keys and certificates*/
 201                 if(!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str()))
 202                 {
 203                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s", certfile.c_str());
 204                 }
 205
 206                 if(!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))
 207                 {
 208                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read key file %s", keyfile.c_str());
 209                 }
 210
 211                 /* Load the CAs we trust*/
 212                 if(!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))
 213                 {
 214                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Can't read CA list from ", cafile.c_str());
 215                 }
 216
 217                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 218                 DH* ret;
 219
 220                 if(dhpfile == NULL)
 221                 {
 222                         ServerInstance->Log(DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 223                         throw ModuleException();
 224                 }
 225                 else
 226                 {
 227                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 228
 229                         if(SSL_CTX_set_tmp_dh(ctx, ret) < 0)
 230                         {
 231                                 ServerInstance->Log(DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters");
 232                         }
 233                 }
 234
 235                 fclose(dhpfile);
 236
 237                 DELETE(Conf);
 238         }
 239
 240         virtual ~ModuleSSLOpenSSL()
 241         {
 242                 SSL_CTX_free(ctx);
 243                 delete culllist;
 244         }
 245
 246         virtual void OnCleanup(int target_type, void* item)
 247         {
 248                 if(target_type == TYPE_USER)
 249                 {
 250                         userrec* user = (userrec*)item;
 251
 252                         if(user->GetExt("ssl", dummy) && IS_LOCAL(user) && isin(user->GetPort(), listenports))
 253                         {
 254                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 255                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 256                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Adding user %s to cull list", user->nick);
 257                                 culllist->AddItem(user, "SSL module unloading");
 258                         }
 259                         if (user->GetExt("ssl_cert", dummy) && isin(user->GetPort(), listenports))
 260                         {
 261                                 ssl_cert* tofree;
 262                                 user->GetExt("ssl_cert", tofree);
 263                                 delete tofree;
 264                                 user->Shrink("ssl_cert");
 265                         }
 266                 }
 267         }
 268
 269         virtual void OnUnloadModule(Module* mod, const std::string &name)
 270         {
 271                 if(mod == this)
 272                 {
 273                         // We're being unloaded, kill all the users added to the cull list in OnCleanup
 274                         int numusers = culllist->Apply();
 275                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Killed %d users for unload of OpenSSL SSL module", numusers);
 276
 277                         for(unsigned int i = 0; i < listenports.size(); i++)
 278                                 ServerInstance->Config->DelIOHook(listenports[i]);
 279                 }
 280         }
 281
 282         virtual Version GetVersion()
 283         {
 284                 return Version(1, 0, 0, 0, VF_VENDOR);
 285         }
 286
 287         void Implements(char* List)
 288         {
 289                 List[I_OnRawSocketAccept] = List[I_OnRawSocketClose] = List[I_OnRawSocketRead] = List[I_OnRawSocketWrite] = List[I_OnCleanup] = 1;
 290                 List[I_OnSyncUserMetaData] = List[I_OnDecodeMetaData] = List[I_OnUnloadModule] = List[I_OnRehash] = List[I_OnWhois] = List[I_OnPostConnect] = 1;
 291         }
 292
 293         virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport)
 294         {
 295                 issl_session* session = &sessions[fd];
 296
 297                 session->fd = fd;
 298                 session->inbuf = new char[inbufsize];
 299                 session->inbufoffset = 0;
 300                 session->sess = SSL_new(ctx);
 301                 session->status = ISSL_NONE;
 302
 303                 if(session->sess == NULL)
 304                 {
 305                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't create SSL object: %s", get_error());
 306                         return;
 307                 }
 308
 309                 if(SSL_set_fd(session->sess, fd) == 0)
 310                 {
 311                         ServerInstance->Log(DEBUG, "m_ssl.so: Couldn't set fd for SSL object: %s", get_error());
 312                         return;
 313                 }
 314
 315                 Handshake(session);
 316         }
 317
 318         virtual void OnRawSocketClose(int fd)
 319         {
 320                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketClose: %d", fd);
 321                 CloseSession(&sessions[fd]);
 322
 323                 EventHandler* user = ServerInstance->SE->GetRef(fd);
 324
 325                 if ((user) && (user->GetExt("ssl_cert", dummy)))
 326                 {
 327                         ssl_cert* tofree;
 328                         user->GetExt("ssl_cert", tofree);
 329                         delete tofree;
 330                         user->Shrink("ssl_cert");
 331                 }
 332         }
 333
 334         virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult)
 335         {
 336                 issl_session* session = &sessions[fd];
 337
 338                 if(!session->sess)
 339                 {
 340                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead: No session to read from");
 341                         readresult = 0;
 342                         CloseSession(session);
 343                         return 1;
 344                 }
 345
 346                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketRead(%d, buffer, %u, %d)", fd, count, readresult);
 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                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: Adding %d bytes to the outgoing buffer", count);
 432                 session->outbuf.append(buffer, count);
 433
 434                 if(session->status == ISSL_HANDSHAKING)
 435                 {
 436                         // The handshake isn't finished, try to finish it.
 437                         if(session->rstat == ISSL_WRITE || session->wstat == ISSL_WRITE)
 438                         {
 439                                 if(Handshake(session))
 440                                 {
 441                                         // Handshake successfully resumed.
 442                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: successfully resumed handshake");
 443                                 }
 444                                 else
 445                                 {
 446                                         // Couldn't resume handshake.
 447                                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: failed to resume handshake");
 448                                 }
 449                         }
 450                         else
 451                         {
 452                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: OnRawSocketWrite: handshake wants to read data but we are currently writing");
 453                         }
 454                 }
 455
 456                 if(session->status == ISSL_OPEN)
 457                 {
 458                         if(session->rstat == ISSL_WRITE)
 459                         {
 460                                 DoRead(session);
 461                         }
 462
 463                         if(session->wstat == ISSL_WRITE)
 464                         {
 465                                 return DoWrite(session);
 466                         }
 467                 }
 468
 469                 return 1;
 470         }
 471
 472         int DoWrite(issl_session* session)
 473         {
 474                 int ret = SSL_write(session->sess, session->outbuf.data(), session->outbuf.size());
 475
 476                 if(ret == 0)
 477                 {
 478                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Client closed the connection");
 479                         CloseSession(session);
 480                         return 0;
 481                 }
 482                 else if(ret < 0)
 483                 {
 484                         int err = SSL_get_error(session->sess, ret);
 485
 486                         if(err == SSL_ERROR_WANT_WRITE)
 487                         {
 488                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written, need to retry: %s", get_error());
 489                                 session->wstat = ISSL_WRITE;
 490                                 return -1;
 491                         }
 492                         else if(err == SSL_ERROR_WANT_READ)
 493                         {
 494                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Not all SSL data written but the damn thing wants to read instead: %s", get_error());
 495                                 session->wstat = ISSL_READ;
 496                                 return -1;
 497                         }
 498                         else
 499                         {
 500                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Error writing SSL data: %s", get_error());
 501                                 CloseSession(session);
 502                                 return 0;
 503                         }
 504                 }
 505                 else
 506                 {
 507                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoWrite: Successfully wrote %d bytes", ret);
 508                         session->outbuf = session->outbuf.substr(ret);
 509                         return ret;
 510                 }
 511         }
 512
 513         int DoRead(issl_session* session)
 514         {
 515                 // Is this right? Not sure if the unencrypted data is garaunteed to be the same length.
 516                 // Read into the inbuffer, offset from the beginning by the amount of data we have that insp hasn't taken yet.
 517                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: SSL_read(sess, inbuf+%d, %d-%d)", session->inbufoffset, inbufsize, session->inbufoffset);
 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                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: DoRead: Read %d bytes, now have %d waiting to be passed up", ret, ret + session->inbufoffset);
 558
 559                         session->inbufoffset += ret;
 560
 561                         return ret;
 562                 }
 563         }
 564
 565         // :kenny.chatspike.net 320 Om Epy|AFK :is a Secure Connection
 566         virtual void OnWhois(userrec* source, userrec* dest)
 567         {
 568                 // Bugfix, only send this numeric for *our* SSL users
 569                 if(dest->GetExt("ssl", dummy) || (IS_LOCAL(dest) &&  isin(dest->GetPort(), listenports)))
 570                 {
 571                         source->WriteServ("320 %s %s :is using a secure connection", source->nick, dest->nick);
 572                 }
 573         }
 574
 575         virtual void OnSyncUserMetaData(userrec* user, Module* proto, void* opaque, const std::string &extname)
 576         {
 577                 // check if the linking module wants to know about OUR metadata
 578                 if(extname == "ssl")
 579                 {
 580                         // check if this user has an swhois field to send
 581                         if(user->GetExt(extname, dummy))
 582                         {
 583                                 // call this function in the linking module, let it format the data how it
 584                                 // sees fit, and send it on its way. We dont need or want to know how.
 585                                 proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, "ON");
 586                         }
 587                 }
 588         }
 589
 590         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 591         {
 592                 // check if its our metadata key, and its associated with a user
 593                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 594                 {
 595                         userrec* dest = (userrec*)target;
 596                         // if they dont already have an ssl flag, accept the remote server's
 597                         if (!dest->GetExt(extname, dummy))
 598                         {
 599                                 dest->Extend(extname, "ON");
 600                         }
 601                 }
 602         }
 603
 604         bool Handshake(issl_session* session)
 605         {
 606                 int ret = SSL_accept(session->sess);
 607
 608                 if(ret < 0)
 609                 {
 610                         int err = SSL_get_error(session->sess, ret);
 611
 612                         if(err == SSL_ERROR_WANT_READ)
 613                         {
 614                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to read again: %s", get_error());
 615                                 session->rstat = ISSL_READ;
 616                                 session->status = ISSL_HANDSHAKING;
 617                         }
 618                         else if(err == SSL_ERROR_WANT_WRITE)
 619                         {
 620                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Not completed, need to write more data: %s", get_error());
 621                                 session->wstat = ISSL_WRITE;
 622                                 session->status = ISSL_HANDSHAKING;
 623                                 MakePollWrite(session);
 624                         }
 625                         else
 626                         {
 627                                 ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake: Failed, bailing: %s", get_error());
 628                                 CloseSession(session);
 629                         }
 630
 631                         return false;
 632                 }
 633                 else
 634                 {
 635                         // Handshake complete.
 636                         ServerInstance->Log(DEBUG, "m_ssl_openssl.so: Handshake completed");
 637
 638                         // This will do for setting the ssl flag...it could be done earlier if it's needed. But this seems neater.
 639                         userrec* u = ServerInstance->FindDescriptor(session->fd);
 640                         if (u)
 641                         {
 642                                 if (!u->GetExt("ssl", dummy))
 643                                         u->Extend("ssl", "ON");
 644                         }
 645
 646                         session->status = ISSL_OPEN;
 647
 648                         MakePollWrite(session);
 649
 650                         return true;
 651                 }
 652         }
 653
 654         virtual void OnPostConnect(userrec* user)
 655         {
 656                 // This occurs AFTER OnUserConnect so we can be sure the
 657                 // protocol module has propogated the NICK message.
 658                 if ((user->GetExt("ssl", dummy)) && (IS_LOCAL(user)))
 659                 {
 660                         // Tell whatever protocol module we're using that we need to inform other servers of this metadata NOW.
 661                         std::deque<std::string>* metadata = new std::deque<std::string>;
 662                         metadata->push_back(user->nick);
 663                         metadata->push_back("ssl");             // The metadata id
 664                         metadata->push_back("ON");              // The value to send
 665                         Event* event = new Event((char*)metadata,(Module*)this,"send_metadata");
 666                         event->Send(ServerInstance);            // Trigger the event. We don't care what module picks it up.
 667                         DELETE(event);
 668                         DELETE(metadata);
 669
 670                         VerifyCertificate(&sessions[user->GetFd()], user);
 671                 }
 672         }
 673
 674         void MakePollWrite(issl_session* session)
 675         {
 676                 OnRawSocketWrite(session->fd, NULL, 0);
 677         }
 678
 679         void CloseSession(issl_session* session)
 680         {
 681                 if(session->sess)
 682                 {
 683                         SSL_shutdown(session->sess);
 684                         SSL_free(session->sess);
 685                 }
 686
 687                 if(session->inbuf)
 688                 {
 689                         delete[] session->inbuf;
 690                 }
 691
 692                 session->outbuf.clear();
 693                 session->inbuf = NULL;
 694                 session->sess = NULL;
 695                 session->status = ISSL_NONE;
 696         }
 697
 698         void VerifyCertificate(issl_session* session, userrec* user)
 699         {
 700                 X509* cert;
 701                 ssl_cert* certinfo = new ssl_cert;
 702                 unsigned int n;
 703                 unsigned char md[EVP_MAX_MD_SIZE];
 704                 const EVP_MD *digest = EVP_md5();
 705                 //char* buf;
 706
 707                 user->Extend("ssl_cert",certinfo);
 708
 709                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 710
 711                 if (!cert)
 712                 {
 713                         certinfo->data.insert(std::make_pair("error","Could not get peer certificate: "+std::string(get_error())));
 714                         return;
 715                 }
 716
 717                 certinfo->data.insert(std::make_pair("invalid", SSL_get_verify_result(session->sess) != X509_V_OK ? ConvToStr(1) : ConvToStr(0)));
 718
 719                 if (SelfSigned)
 720                 {
 721                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(0)));
 722                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(1)));
 723                 }
 724                 else
 725                 {
 726                         certinfo->data.insert(std::make_pair("unknownsigner",ConvToStr(1)));
 727                         certinfo->data.insert(std::make_pair("trusted",ConvToStr(0)));
 728                 }
 729
 730                 /*if (!X509_verify_cert(cert))
 731                 {
 732                         certinfo->data.insert(std::make_pair("invalid",ConvToStr(1)));
 733                 }
 734                 else
 735                 {
 736                         certinfo->data.insert(std::make_pair("invalid",ConvToStr(0)));
 737                 }*/
 738
 739                 //X509_NAME_oneline(nm, 0, 0);
 740                 certinfo->data.insert(std::make_pair("dn",std::string(X509_NAME_oneline(X509_get_subject_name(cert),0,0))));
 741                 certinfo->data.insert(std::make_pair("issuer",std::string(X509_NAME_oneline(X509_get_issuer_name(cert),0,0))));
 742
 743                 if (!X509_digest(cert, digest, md, &n))
 744                 {
 745                         certinfo->data.insert(std::make_pair("error","Out of memory generating fingerprint"));
 746                 }
 747                 else
 748                 {
 749                         certinfo->data.insert(std::make_pair("fingerprint",irc::hex(md, n)));
 750                 }
 751
 752                 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))
 753                 {
 754                         certinfo->data.insert(std::make_pair("error","Not activated, or expired certificate"));
 755                 }
 756         }
 757 };
 758
 759 class ModuleSSLOpenSSLFactory : public ModuleFactory
 760 {
 761  public:
 762         ModuleSSLOpenSSLFactory()
 763         {
 764         }
 765
 766         ~ModuleSSLOpenSSLFactory()
 767         {
 768         }
 769
 770         virtual Module * CreateModule(InspIRCd* Me)
 771         {
 772                 return new ModuleSSLOpenSSL(Me);
 773         }
 774 };
 775
 776
 777 extern "C" void * init_module( void )
 778 {
 779         return new ModuleSSLOpenSSLFactory;
 780 }