src/modules/extra/m_ssl_openssl.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
   6  *   Copyright (C) 2006-2008 Craig Edwards <craigedwards@brainbox.cc>
   7  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
   8  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   9  *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
  10  *
  11  * This file is part of InspIRCd.  InspIRCd is free software: you can
  12  * redistribute it and/or modify it under the terms of the GNU General Public
  13  * License as published by the Free Software Foundation, version 2.
  14  *
  15  * This program is distributed in the hope that it will be useful, but WITHOUT
  16  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  17  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  18  * details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24  /* HACK: This prevents OpenSSL on OS X 10.7 and later from spewing deprecation
  25   * warnings for every single function call. As far as I (SaberUK) know, Apple
  26   * have no plans to remove OpenSSL so this warning just causes needless spam.
  27   */
  28 #ifdef __APPLE__
  29 # define __AVAILABILITYMACROS__
  30 # define DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER
  31 #endif
  32
  33 #include "inspircd.h"
  34 #include "iohook.h"
  35 #include <openssl/ssl.h>
  36 #include <openssl/err.h>
  37 #include "modules/ssl.h"
  38
  39 #ifdef _WIN32
  40 # pragma comment(lib, "libcrypto.lib")
  41 # pragma comment(lib, "libssl.lib")
  42 # pragma comment(lib, "user32.lib")
  43 # pragma comment(lib, "advapi32.lib")
  44 # pragma comment(lib, "libgcc.lib")
  45 # pragma comment(lib, "libmingwex.lib")
  46 # pragma comment(lib, "gdi32.lib")
  47 # undef MAX_DESCRIPTORS
  48 # define MAX_DESCRIPTORS 10000
  49 #endif
  50
  51 /* $LinkerFlags: if("USE_FREEBSD_BASE_SSL") -lssl -lcrypto */
  52 /* $CompileFlags: if(!"USE_FREEBSD_BASE_SSL") pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
  53 /* $LinkerFlags: if(!"USE_FREEBSD_BASE_SSL") rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
  54
  55 /* $NoPedantic */
  56
  57
  58 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
  59
  60 static bool SelfSigned = false;
  61
  62 char* get_error()
  63 {
  64         return ERR_error_string(ERR_get_error(), NULL);
  65 }
  66
  67 static int error_callback(const char *str, size_t len, void *u);
  68
  69 /** Represents an SSL user's extra data
  70  */
  71 class issl_session
  72 {
  73 public:
  74         SSL* sess;
  75         issl_status status;
  76         reference<ssl_cert> cert;
  77
  78         bool outbound;
  79         bool data_to_write;
  80
  81         issl_session()
  82         {
  83                 outbound = false;
  84                 data_to_write = false;
  85         }
  86 };
  87
  88 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  89 {
  90         /* XXX: This will allow self signed certificates.
  91          * In the future if we want an option to not allow this,
  92          * we can just return preverify_ok here, and openssl
  93          * will boot off self-signed and invalid peer certs.
  94          */
  95         int ve = X509_STORE_CTX_get_error(ctx);
  96
  97         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  98
  99         return 1;
 100 }
 101
 102 class OpenSSLIOHook : public SSLIOHook
 103 {
 104  private:
 105         bool Handshake(StreamSocket* user, issl_session* session)
 106         {
 107                 int ret;
 108
 109                 if (session->outbound)
 110                         ret = SSL_connect(session->sess);
 111                 else
 112                         ret = SSL_accept(session->sess);
 113
 114                 if (ret < 0)
 115                 {
 116                         int err = SSL_get_error(session->sess, ret);
 117
 118                         if (err == SSL_ERROR_WANT_READ)
 119                         {
 120                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 121                                 session->status = ISSL_HANDSHAKING;
 122                                 return true;
 123                         }
 124                         else if (err == SSL_ERROR_WANT_WRITE)
 125                         {
 126                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 127                                 session->status = ISSL_HANDSHAKING;
 128                                 return true;
 129                         }
 130                         else
 131                         {
 132                                 CloseSession(session);
 133                         }
 134
 135                         return false;
 136                 }
 137                 else if (ret > 0)
 138                 {
 139                         // Handshake complete.
 140                         VerifyCertificate(session, user);
 141
 142                         session->status = ISSL_OPEN;
 143
 144                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
 145
 146                         return true;
 147                 }
 148                 else if (ret == 0)
 149                 {
 150                         CloseSession(session);
 151                         return true;
 152                 }
 153
 154                 return true;
 155         }
 156
 157         void CloseSession(issl_session* session)
 158         {
 159                 if (session->sess)
 160                 {
 161                         SSL_shutdown(session->sess);
 162                         SSL_free(session->sess);
 163                 }
 164
 165                 session->sess = NULL;
 166                 session->status = ISSL_NONE;
 167                 errno = EIO;
 168         }
 169
 170         void VerifyCertificate(issl_session* session, StreamSocket* user)
 171         {
 172                 if (!session->sess || !user)
 173                         return;
 174
 175                 X509* cert;
 176                 ssl_cert* certinfo = new ssl_cert;
 177                 session->cert = certinfo;
 178                 unsigned int n;
 179                 unsigned char md[EVP_MAX_MD_SIZE];
 180
 181                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 182
 183                 if (!cert)
 184                 {
 185                         certinfo->error = "Could not get peer certificate: "+std::string(get_error());
 186                         return;
 187                 }
 188
 189                 certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
 190
 191                 if (SelfSigned)
 192                 {
 193                         certinfo->unknownsigner = false;
 194                         certinfo->trusted = true;
 195                 }
 196                 else
 197                 {
 198                         certinfo->unknownsigner = true;
 199                         certinfo->trusted = false;
 200                 }
 201
 202                 certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
 203                 certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
 204
 205                 if (!X509_digest(cert, digest, md, &n))
 206                 {
 207                         certinfo->error = "Out of memory generating fingerprint";
 208                 }
 209                 else
 210                 {
 211                         certinfo->fingerprint = BinToHex(md, n);
 212                 }
 213
 214                 if ((ASN1_UTCTIME_cmp_time_t(X509_get_notAfter(cert), ServerInstance->Time()) == -1) || (ASN1_UTCTIME_cmp_time_t(X509_get_notBefore(cert), ServerInstance->Time()) == 0))
 215                 {
 216                         certinfo->error = "Not activated, or expired certificate";
 217                 }
 218
 219                 X509_free(cert);
 220         }
 221
 222  public:
 223         issl_session* sessions;
 224         SSL_CTX* ctx;
 225         SSL_CTX* clictx;
 226         const EVP_MD *digest;
 227
 228         OpenSSLIOHook(Module* mod)
 229                 : SSLIOHook(mod, "ssl/openssl")
 230         {
 231                 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
 232         }
 233
 234         ~OpenSSLIOHook()
 235         {
 236                 delete[] sessions;
 237         }
 238
 239         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
 240         {
 241                 int fd = user->GetFd();
 242
 243                 issl_session* session = &sessions[fd];
 244
 245                 session->sess = SSL_new(ctx);
 246                 session->status = ISSL_NONE;
 247                 session->outbound = false;
 248                 session->cert = NULL;
 249
 250                 if (session->sess == NULL)
 251                         return;
 252
 253                 if (SSL_set_fd(session->sess, fd) == 0)
 254                 {
 255                         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "BUG: Can't set fd with SSL_set_fd: %d", fd);
 256                         return;
 257                 }
 258
 259                 Handshake(user, session);
 260         }
 261
 262         void OnStreamSocketConnect(StreamSocket* user) CXX11_OVERRIDE
 263         {
 264                 int fd = user->GetFd();
 265                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 266                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
 267                         return;
 268
 269                 issl_session* session = &sessions[fd];
 270
 271                 session->sess = SSL_new(clictx);
 272                 session->status = ISSL_NONE;
 273                 session->outbound = true;
 274
 275                 if (session->sess == NULL)
 276                         return;
 277
 278                 if (SSL_set_fd(session->sess, fd) == 0)
 279                 {
 280                         ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "BUG: Can't set fd with SSL_set_fd: %d", fd);
 281                         return;
 282                 }
 283
 284                 Handshake(user, session);
 285         }
 286
 287         void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
 288         {
 289                 int fd = user->GetFd();
 290                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 291                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 292                         return;
 293
 294                 CloseSession(&sessions[fd]);
 295         }
 296
 297         int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
 298         {
 299                 int fd = user->GetFd();
 300                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 301                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 302                         return -1;
 303
 304                 issl_session* session = &sessions[fd];
 305
 306                 if (!session->sess)
 307                 {
 308                         CloseSession(session);
 309                         return -1;
 310                 }
 311
 312                 if (session->status == ISSL_HANDSHAKING)
 313                 {
 314                         // The handshake isn't finished and it wants to read, try to finish it.
 315                         if (!Handshake(user, session))
 316                         {
 317                                 // Couldn't resume handshake.
 318                                 if (session->status == ISSL_NONE)
 319                                         return -1;
 320                                 return 0;
 321                         }
 322                 }
 323
 324                 // If we resumed the handshake then session->status will be ISSL_OPEN
 325
 326                 if (session->status == ISSL_OPEN)
 327                 {
 328                         char* buffer = ServerInstance->GetReadBuffer();
 329                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 330                         int ret = SSL_read(session->sess, buffer, bufsiz);
 331
 332                         if (ret > 0)
 333                         {
 334                                 recvq.append(buffer, ret);
 335                                 if (session->data_to_write)
 336                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 337                                 return 1;
 338                         }
 339                         else if (ret == 0)
 340                         {
 341                                 // Client closed connection.
 342                                 CloseSession(session);
 343                                 user->SetError("Connection closed");
 344                                 return -1;
 345                         }
 346                         else if (ret < 0)
 347                         {
 348                                 int err = SSL_get_error(session->sess, ret);
 349
 350                                 if (err == SSL_ERROR_WANT_READ)
 351                                 {
 352                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 353                                         return 0;
 354                                 }
 355                                 else if (err == SSL_ERROR_WANT_WRITE)
 356                                 {
 357                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 358                                         return 0;
 359                                 }
 360                                 else
 361                                 {
 362                                         CloseSession(session);
 363                                         return -1;
 364                                 }
 365                         }
 366                 }
 367
 368                 return 0;
 369         }
 370
 371         int OnStreamSocketWrite(StreamSocket* user, std::string& buffer) CXX11_OVERRIDE
 372         {
 373                 int fd = user->GetFd();
 374
 375                 issl_session* session = &sessions[fd];
 376
 377                 if (!session->sess)
 378                 {
 379                         CloseSession(session);
 380                         return -1;
 381                 }
 382
 383                 session->data_to_write = true;
 384
 385                 if (session->status == ISSL_HANDSHAKING)
 386                 {
 387                         if (!Handshake(user, session))
 388                         {
 389                                 // Couldn't resume handshake.
 390                                 if (session->status == ISSL_NONE)
 391                                         return -1;
 392                                 return 0;
 393                         }
 394                 }
 395
 396                 if (session->status == ISSL_OPEN)
 397                 {
 398                         int ret = SSL_write(session->sess, buffer.data(), buffer.size());
 399                         if (ret == (int)buffer.length())
 400                         {
 401                                 session->data_to_write = false;
 402                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 403                                 return 1;
 404                         }
 405                         else if (ret > 0)
 406                         {
 407                                 buffer = buffer.substr(ret);
 408                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 409                                 return 0;
 410                         }
 411                         else if (ret == 0)
 412                         {
 413                                 CloseSession(session);
 414                                 return -1;
 415                         }
 416                         else if (ret < 0)
 417                         {
 418                                 int err = SSL_get_error(session->sess, ret);
 419
 420                                 if (err == SSL_ERROR_WANT_WRITE)
 421                                 {
 422                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 423                                         return 0;
 424                                 }
 425                                 else if (err == SSL_ERROR_WANT_READ)
 426                                 {
 427                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 428                                         return 0;
 429                                 }
 430                                 else
 431                                 {
 432                                         CloseSession(session);
 433                                         return -1;
 434                                 }
 435                         }
 436                 }
 437                 return 0;
 438         }
 439
 440         ssl_cert* GetCertificate(StreamSocket* sock) CXX11_OVERRIDE
 441         {
 442                 int fd = sock->GetFd();
 443                 issl_session* session = &sessions[fd];
 444                 return session->cert;
 445         }
 446
 447         void TellCiphersAndFingerprint(LocalUser* user)
 448         {
 449                 issl_session& s = sessions[user->eh.GetFd()];
 450                 if (s.sess)
 451                 {
 452                         std::string text = "*** You are connected using SSL cipher '" + std::string(SSL_get_cipher(s.sess)) + "'";
 453                         const std::string& fingerprint = s.cert->fingerprint;
 454                         if (!fingerprint.empty())
 455                                 text += " and your SSL fingerprint is " + fingerprint;
 456
 457                         user->WriteNotice(text);
 458                 }
 459         }
 460 };
 461
 462 class ModuleSSLOpenSSL : public Module
 463 {
 464         std::string sslports;
 465         OpenSSLIOHook iohook;
 466
 467  public:
 468         ModuleSSLOpenSSL() : iohook(this)
 469         {
 470                 /* Global SSL library initialization*/
 471                 SSL_library_init();
 472                 SSL_load_error_strings();
 473
 474                 /* Build our SSL contexts:
 475                  * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
 476                  */
 477                 iohook.ctx = SSL_CTX_new( SSLv23_server_method() );
 478                 iohook.clictx = SSL_CTX_new( SSLv23_client_method() );
 479
 480                 SSL_CTX_set_mode(iohook.ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 481                 SSL_CTX_set_mode(iohook.clictx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 482
 483                 SSL_CTX_set_verify(iohook.ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 484                 SSL_CTX_set_verify(iohook.clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 485         }
 486
 487         ~ModuleSSLOpenSSL()
 488         {
 489                 SSL_CTX_free(iohook.ctx);
 490                 SSL_CTX_free(iohook.clictx);
 491         }
 492
 493         void init() CXX11_OVERRIDE
 494         {
 495                 // Needs the flag as it ignores a plain /rehash
 496                 OnModuleRehash(NULL,"ssl");
 497                 ServerInstance->Modules->AddService(iohook);
 498         }
 499
 500         void OnHookIO(StreamSocket* user, ListenSocket* lsb) CXX11_OVERRIDE
 501         {
 502                 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl")
 503                 {
 504                         /* Hook the user with our module */
 505                         user->AddIOHook(&iohook);
 506                 }
 507         }
 508
 509         void OnRehash(User* user) CXX11_OVERRIDE
 510         {
 511                 sslports.clear();
 512
 513                 ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
 514
 515                 if (Conf->getBool("showports", true))
 516                 {
 517                         sslports = Conf->getString("advertisedports");
 518                         if (!sslports.empty())
 519                                 return;
 520
 521                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 522                         {
 523                                 ListenSocket* port = ServerInstance->ports[i];
 524                                 if (port->bind_tag->getString("ssl") != "openssl")
 525                                         continue;
 526
 527                                 const std::string& portid = port->bind_desc;
 528                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Enabling SSL for port %s", portid.c_str());
 529
 530                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 531                                 {
 532                                         /*
 533                                          * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
 534                                          * the IP:port in ISUPPORT.
 535                                          *
 536                                          * We used to advertise all ports seperated by a ';' char that matched the above criteria,
 537                                          * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
 538                                          * To solve this by default we now only display the first IP:port found and let the user
 539                                          * configure the exact value for the 005 token, if necessary.
 540                                          */
 541                                         sslports = portid;
 542                                         break;
 543                                 }
 544                         }
 545                 }
 546         }
 547
 548         void OnModuleRehash(User* user, const std::string &param) CXX11_OVERRIDE
 549         {
 550                 if (param != "ssl")
 551                         return;
 552
 553                 std::string keyfile;
 554                 std::string certfile;
 555                 std::string cafile;
 556                 std::string dhfile;
 557                 OnRehash(user);
 558
 559                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 560
 561                 cafile   = conf->getString("cafile", CONFIG_PATH "/ca.pem");
 562                 certfile = conf->getString("certfile", CONFIG_PATH "/cert.pem");
 563                 keyfile  = conf->getString("keyfile", CONFIG_PATH "/key.pem");
 564                 dhfile   = conf->getString("dhfile", CONFIG_PATH "/dhparams.pem");
 565                 std::string hash = conf->getString("hash", "md5");
 566
 567                 iohook.digest = EVP_get_digestbyname(hash.c_str());
 568                 if (iohook.digest == NULL)
 569                         throw ModuleException("Unknown hash type " + hash);
 570
 571                 std::string ciphers = conf->getString("ciphers", "");
 572
 573                 SSL_CTX* ctx = iohook.ctx;
 574                 SSL_CTX* clictx = iohook.clictx;
 575
 576                 if (!ciphers.empty())
 577                 {
 578                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 579                         {
 580                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Can't set cipher list to %s.", ciphers.c_str());
 581                                 ERR_print_errors_cb(error_callback, this);
 582                         }
 583                 }
 584
 585                 /* Load our keys and certificates
 586                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 587                  */
 588                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 589                 {
 590                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 591                         ERR_print_errors_cb(error_callback, this);
 592                 }
 593
 594                 if (((!SSL_CTX_use_PrivateKey_file(ctx, keyfile.c_str(), SSL_FILETYPE_PEM))) || (!SSL_CTX_use_PrivateKey_file(clictx, keyfile.c_str(), SSL_FILETYPE_PEM)))
 595                 {
 596                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 597                         ERR_print_errors_cb(error_callback, this);
 598                 }
 599
 600                 /* Load the CAs we trust*/
 601                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 602                 {
 603                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Can't read CA list from %s. This is only a problem if you want to verify client certificates, otherwise it's safe to ignore this message. Error: %s", cafile.c_str(), strerror(errno));
 604                         ERR_print_errors_cb(error_callback, this);
 605                 }
 606
 607                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 608                 DH* ret;
 609
 610                 if (dhpfile == NULL)
 611                 {
 612                         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 613                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 614                 }
 615                 else
 616                 {
 617                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 618                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 619                         {
 620                                 ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 621                                 ERR_print_errors_cb(error_callback, this);
 622                         }
 623                 }
 624
 625                 fclose(dhpfile);
 626         }
 627
 628         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
 629         {
 630                 if (!sslports.empty())
 631                         tokens["SSL"] = sslports;
 632         }
 633
 634         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 635         {
 636                 if (user->eh.GetIOHook() == &iohook)
 637                         iohook.TellCiphersAndFingerprint(user);
 638         }
 639
 640         void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
 641         {
 642                 if (target_type == TYPE_USER)
 643                 {
 644                         LocalUser* user = IS_LOCAL((User*)item);
 645
 646                         if (user && user->eh.GetIOHook() == &iohook)
 647                         {
 648                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 649                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 650                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 651                         }
 652                 }
 653         }
 654
 655         Version GetVersion() CXX11_OVERRIDE
 656         {
 657                 return Version("Provides SSL support for clients", VF_VENDOR);
 658         }
 659 };
 660
 661 static int error_callback(const char *str, size_t len, void *u)
 662 {
 663         ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "SSL error: " + std::string(str, len - 1));
 664
 665         //
 666         // XXX: Remove this line, it causes valgrind warnings...
 667         //
 668         // MD_update(&m, buf, j);
 669         //
 670         //
 671         // ... ONLY JOKING! :-)
 672         //
 673
 674         return 0;
 675 }
 676
 677 MODULE_INIT(ModuleSSLOpenSSL)