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
  25 #include "inspircd.h"
  26 #include <openssl/ssl.h>
  27 #include <openssl/err.h>
  28 #include "ssl.h"
  29
  30 #ifdef WINDOWS
  31 # pragma comment(lib, "libcrypto.lib")
  32 # pragma comment(lib, "libssl.lib")
  33 # pragma comment(lib, "user32.lib")
  34 # pragma comment(lib, "advapi32.lib")
  35 # pragma comment(lib, "libgcc.lib")
  36 # pragma comment(lib, "libmingwex.lib")
  37 # pragma comment(lib, "gdi32.lib")
  38 # undef MAX_DESCRIPTORS
  39 # define MAX_DESCRIPTORS 10000
  40 #endif
  41
  42 /* $ModDesc: Provides SSL support for clients */
  43
  44 /* $LinkerFlags: if("USE_FREEBSD_BASE_SSL") -lssl -lcrypto */
  45 /* $CompileFlags: if(!"USE_FREEBSD_BASE_SSL") pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
  46 /* $LinkerFlags: if(!"USE_FREEBSD_BASE_SSL") rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
  47
  48 /* $NoPedantic */
  49
  50
  51 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
  52
  53 static bool SelfSigned = false;
  54
  55 char* get_error()
  56 {
  57         return ERR_error_string(ERR_get_error(), NULL);
  58 }
  59
  60 static int error_callback(const char *str, size_t len, void *u);
  61
  62 /** Represents an SSL user's extra data
  63  */
  64 class issl_session
  65 {
  66 public:
  67         SSL* sess;
  68         issl_status status;
  69         reference<ssl_cert> cert;
  70
  71         int fd;
  72         bool outbound;
  73         bool data_to_write;
  74
  75         issl_session()
  76         {
  77                 outbound = false;
  78                 data_to_write = false;
  79         }
  80 };
  81
  82 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  83 {
  84         /* XXX: This will allow self signed certificates.
  85          * In the future if we want an option to not allow this,
  86          * we can just return preverify_ok here, and openssl
  87          * will boot off self-signed and invalid peer certs.
  88          */
  89         int ve = X509_STORE_CTX_get_error(ctx);
  90
  91         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  92
  93         return 1;
  94 }
  95
  96 class ModuleSSLOpenSSL : public Module
  97 {
  98         int inbufsize;
  99         issl_session* sessions;
 100
 101         SSL_CTX* ctx;
 102         SSL_CTX* clictx;
 103
 104         char cipher[MAXBUF];
 105
 106         std::string sslports;
 107         bool use_sha;
 108
 109         ServiceProvider iohook;
 110  public:
 111
 112         ModuleSSLOpenSSL() : iohook(this, "ssl/openssl", SERVICE_IOHOOK)
 113         {
 114                 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
 115
 116                 // Not rehashable...because I cba to reduce all the sizes of existing buffers.
 117                 inbufsize = ServerInstance->Config->NetBufferSize;
 118
 119                 /* Global SSL library initialization*/
 120                 SSL_library_init();
 121                 SSL_load_error_strings();
 122
 123                 /* Build our SSL contexts:
 124                  * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
 125                  */
 126                 ctx = SSL_CTX_new( SSLv23_server_method() );
 127                 clictx = SSL_CTX_new( SSLv23_client_method() );
 128
 129                 SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 130                 SSL_CTX_set_mode(clictx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 131
 132                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 133                 SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 134         }
 135
 136         void init()
 137         {
 138                 // Needs the flag as it ignores a plain /rehash
 139                 OnModuleRehash(NULL,"ssl");
 140                 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect };
 141                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 142                 ServerInstance->Modules->AddService(iohook);
 143         }
 144
 145         void OnHookIO(StreamSocket* user, ListenSocket* lsb)
 146         {
 147                 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl")
 148                 {
 149                         /* Hook the user with our module */
 150                         user->AddIOHook(this);
 151                 }
 152         }
 153
 154         void OnRehash(User* user)
 155         {
 156                 sslports.clear();
 157
 158                 ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
 159
 160                 if (Conf->getBool("showports", true))
 161                 {
 162                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 163                         {
 164                                 ListenSocket* port = ServerInstance->ports[i];
 165                                 if (port->bind_tag->getString("ssl") != "openssl")
 166                                         continue;
 167
 168                                 std::string portid = port->bind_desc;
 169                                 ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
 170                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 171                                         sslports.append(portid).append(";");
 172                         }
 173
 174                         if (!sslports.empty())
 175                                 sslports.erase(sslports.end() - 1);
 176                 }
 177         }
 178
 179         void OnModuleRehash(User* user, const std::string &param)
 180         {
 181                 if (param != "ssl")
 182                         return;
 183
 184                 std::string keyfile;
 185                 std::string certfile;
 186                 std::string cafile;
 187                 std::string dhfile;
 188                 OnRehash(user);
 189
 190                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 191
 192                 cafile   = conf->getString("cafile", "conf/ca.pem");
 193                 certfile = conf->getString("certfile", "conf/cert.pem");
 194                 keyfile  = conf->getString("keyfile", "conf/key.pem");
 195                 dhfile   = conf->getString("dhfile", "conf/dhparams.pem");
 196                 std::string hash = conf->getString("hash", "md5");
 197                 if (hash != "sha1" && hash != "md5")
 198                         throw ModuleException("Unknown hash type " + hash);
 199                 use_sha = (hash == "sha1");
 200
 201                 std::string ciphers = conf->getString("ciphers", "");
 202
 203                 if (!ciphers.empty())
 204                 {
 205                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 206                         {
 207                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
 208                                 ERR_print_errors_cb(error_callback, this);
 209                         }
 210                 }
 211
 212                 /* Load our keys and certificates
 213                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 214                  */
 215                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 216                 {
 217                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 218                         ERR_print_errors_cb(error_callback, this);
 219                 }
 220
 221                 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)))
 222                 {
 223                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 224                         ERR_print_errors_cb(error_callback, this);
 225                 }
 226
 227                 /* Load the CAs we trust*/
 228                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 229                 {
 230                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));
 231                         ERR_print_errors_cb(error_callback, this);
 232                 }
 233
 234                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 235                 DH* ret;
 236
 237                 if (dhpfile == NULL)
 238                 {
 239                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 240                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 241                 }
 242                 else
 243                 {
 244                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 245                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 246                         {
 247                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 248                                 ERR_print_errors_cb(error_callback, this);
 249                         }
 250                 }
 251
 252                 fclose(dhpfile);
 253         }
 254
 255         void On005Numeric(std::string &output)
 256         {
 257                 if (!sslports.empty())
 258                         output.append(" SSL=" + sslports);
 259         }
 260
 261         ~ModuleSSLOpenSSL()
 262         {
 263                 SSL_CTX_free(ctx);
 264                 SSL_CTX_free(clictx);
 265                 delete[] sessions;
 266         }
 267
 268         void OnUserConnect(LocalUser* user)
 269         {
 270                 if (user->eh.GetIOHook() == this)
 271                 {
 272                         if (sessions[user->eh.GetFd()].sess)
 273                         {
 274                                 if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
 275                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
 276                                                 " and your SSL fingerprint is %s", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess), sessions[user->eh.GetFd()].cert->fingerprint.c_str());
 277                                 else
 278                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess));
 279                         }
 280                 }
 281         }
 282
 283         void OnCleanup(int target_type, void* item)
 284         {
 285                 if (target_type == TYPE_USER)
 286                 {
 287                         LocalUser* user = IS_LOCAL((User*)item);
 288
 289                         if (user && user->eh.GetIOHook() == this)
 290                         {
 291                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 292                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 293                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 294                         }
 295                 }
 296         }
 297
 298         Version GetVersion()
 299         {
 300                 return Version("Provides SSL support for clients", VF_VENDOR);
 301         }
 302
 303         void OnRequest(Request& request)
 304         {
 305                 if (strcmp("GET_SSL_CERT", request.id) == 0)
 306                 {
 307                         SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
 308                         int fd = req.sock->GetFd();
 309                         issl_session* session = &sessions[fd];
 310
 311                         req.cert = session->cert;
 312                 }
 313         }
 314
 315         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
 316         {
 317                 int fd = user->GetFd();
 318
 319                 issl_session* session = &sessions[fd];
 320
 321                 session->fd = fd;
 322                 session->sess = SSL_new(ctx);
 323                 session->status = ISSL_NONE;
 324                 session->outbound = false;
 325                 session->cert = NULL;
 326
 327                 if (session->sess == NULL)
 328                         return;
 329
 330                 if (SSL_set_fd(session->sess, fd) == 0)
 331                 {
 332                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 333                         return;
 334                 }
 335
 336                 Handshake(user, session);
 337         }
 338
 339         void OnStreamSocketConnect(StreamSocket* user)
 340         {
 341                 int fd = user->GetFd();
 342                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 343                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
 344                         return;
 345
 346                 issl_session* session = &sessions[fd];
 347
 348                 session->fd = fd;
 349                 session->sess = SSL_new(clictx);
 350                 session->status = ISSL_NONE;
 351                 session->outbound = true;
 352
 353                 if (session->sess == NULL)
 354                         return;
 355
 356                 if (SSL_set_fd(session->sess, fd) == 0)
 357                 {
 358                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 359                         return;
 360                 }
 361
 362                 Handshake(user, session);
 363         }
 364
 365         void OnStreamSocketClose(StreamSocket* user)
 366         {
 367                 int fd = user->GetFd();
 368                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 369                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 370                         return;
 371
 372                 CloseSession(&sessions[fd]);
 373         }
 374
 375         int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
 376         {
 377                 int fd = user->GetFd();
 378                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 379                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 380                         return -1;
 381
 382                 issl_session* session = &sessions[fd];
 383
 384                 if (!session->sess)
 385                 {
 386                         CloseSession(session);
 387                         return -1;
 388                 }
 389
 390                 if (session->status == ISSL_HANDSHAKING)
 391                 {
 392                         // The handshake isn't finished and it wants to read, try to finish it.
 393                         if (!Handshake(user, session))
 394                         {
 395                                 // Couldn't resume handshake.
 396                                 if (session->status == ISSL_NONE)
 397                                         return -1;
 398                                 return 0;
 399                         }
 400                 }
 401
 402                 // If we resumed the handshake then session->status will be ISSL_OPEN
 403
 404                 if (session->status == ISSL_OPEN)
 405                 {
 406                         char* buffer = ServerInstance->GetReadBuffer();
 407                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 408                         int ret = SSL_read(session->sess, buffer, bufsiz);
 409
 410                         if (ret > 0)
 411                         {
 412                                 recvq.append(buffer, ret);
 413                                 if (session->data_to_write)
 414                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 415                                 return 1;
 416                         }
 417                         else if (ret == 0)
 418                         {
 419                                 // Client closed connection.
 420                                 CloseSession(session);
 421                                 return -1;
 422                         }
 423                         else if (ret < 0)
 424                         {
 425                                 int err = SSL_get_error(session->sess, ret);
 426
 427                                 if (err == SSL_ERROR_WANT_READ)
 428                                 {
 429                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 430                                         return 0;
 431                                 }
 432                                 else if (err == SSL_ERROR_WANT_WRITE)
 433                                 {
 434                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 435                                         return 0;
 436                                 }
 437                                 else
 438                                 {
 439                                         CloseSession(session);
 440                                         return -1;
 441                                 }
 442                         }
 443                 }
 444
 445                 return 0;
 446         }
 447
 448         int OnStreamSocketWrite(StreamSocket* user, std::string& buffer)
 449         {
 450                 int fd = user->GetFd();
 451
 452                 issl_session* session = &sessions[fd];
 453
 454                 if (!session->sess)
 455                 {
 456                         CloseSession(session);
 457                         return -1;
 458                 }
 459
 460                 session->data_to_write = true;
 461
 462                 if (session->status == ISSL_HANDSHAKING)
 463                 {
 464                         if (!Handshake(user, session))
 465                         {
 466                                 // Couldn't resume handshake.
 467                                 if (session->status == ISSL_NONE)
 468                                         return -1;
 469                                 return 0;
 470                         }
 471                 }
 472
 473                 if (session->status == ISSL_OPEN)
 474                 {
 475                         int ret = SSL_write(session->sess, buffer.data(), buffer.size());
 476                         if (ret == (int)buffer.length())
 477                         {
 478                                 session->data_to_write = false;
 479                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 480                                 return 1;
 481                         }
 482                         else if (ret > 0)
 483                         {
 484                                 buffer = buffer.substr(ret);
 485                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 486                                 return 0;
 487                         }
 488                         else if (ret == 0)
 489                         {
 490                                 CloseSession(session);
 491                                 return -1;
 492                         }
 493                         else if (ret < 0)
 494                         {
 495                                 int err = SSL_get_error(session->sess, ret);
 496
 497                                 if (err == SSL_ERROR_WANT_WRITE)
 498                                 {
 499                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 500                                         return 0;
 501                                 }
 502                                 else if (err == SSL_ERROR_WANT_READ)
 503                                 {
 504                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 505                                         return 0;
 506                                 }
 507                                 else
 508                                 {
 509                                         CloseSession(session);
 510                                         return -1;
 511                                 }
 512                         }
 513                 }
 514                 return 0;
 515         }
 516
 517         bool Handshake(StreamSocket* user, issl_session* session)
 518         {
 519                 int ret;
 520
 521                 if (session->outbound)
 522                         ret = SSL_connect(session->sess);
 523                 else
 524                         ret = SSL_accept(session->sess);
 525
 526                 if (ret < 0)
 527                 {
 528                         int err = SSL_get_error(session->sess, ret);
 529
 530                         if (err == SSL_ERROR_WANT_READ)
 531                         {
 532                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 533                                 session->status = ISSL_HANDSHAKING;
 534                                 return true;
 535                         }
 536                         else if (err == SSL_ERROR_WANT_WRITE)
 537                         {
 538                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 539                                 session->status = ISSL_HANDSHAKING;
 540                                 return true;
 541                         }
 542                         else
 543                         {
 544                                 CloseSession(session);
 545                         }
 546
 547                         return false;
 548                 }
 549                 else if (ret > 0)
 550                 {
 551                         // Handshake complete.
 552                         VerifyCertificate(session, user);
 553
 554                         session->status = ISSL_OPEN;
 555
 556                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
 557
 558                         return true;
 559                 }
 560                 else if (ret == 0)
 561                 {
 562                         CloseSession(session);
 563                         return true;
 564                 }
 565
 566                 return true;
 567         }
 568
 569         void CloseSession(issl_session* session)
 570         {
 571                 if (session->sess)
 572                 {
 573                         SSL_shutdown(session->sess);
 574                         SSL_free(session->sess);
 575                 }
 576
 577                 session->sess = NULL;
 578                 session->status = ISSL_NONE;
 579                 errno = EIO;
 580         }
 581
 582         void VerifyCertificate(issl_session* session, StreamSocket* user)
 583         {
 584                 if (!session->sess || !user)
 585                         return;
 586
 587                 X509* cert;
 588                 ssl_cert* certinfo = new ssl_cert;
 589                 session->cert = certinfo;
 590                 unsigned int n;
 591                 unsigned char md[EVP_MAX_MD_SIZE];
 592                 const EVP_MD *digest = use_sha ? EVP_sha1() : EVP_md5();
 593
 594                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 595
 596                 if (!cert)
 597                 {
 598                         certinfo->error = "Could not get peer certificate: "+std::string(get_error());
 599                         return;
 600                 }
 601
 602                 certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
 603
 604                 if (SelfSigned)
 605                 {
 606                         certinfo->unknownsigner = false;
 607                         certinfo->trusted = true;
 608                 }
 609                 else
 610                 {
 611                         certinfo->unknownsigner = true;
 612                         certinfo->trusted = false;
 613                 }
 614
 615                 certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
 616                 certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
 617
 618                 if (!X509_digest(cert, digest, md, &n))
 619                 {
 620                         certinfo->error = "Out of memory generating fingerprint";
 621                 }
 622                 else
 623                 {
 624                         certinfo->fingerprint = irc::hex(md, n);
 625                 }
 626
 627                 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))
 628                 {
 629                         certinfo->error = "Not activated, or expired certificate";
 630                 }
 631
 632                 X509_free(cert);
 633         }
 634 };
 635
 636 static int error_callback(const char *str, size_t len, void *u)
 637 {
 638         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "SSL error: " + std::string(str, len - 1));
 639
 640         //
 641         // XXX: Remove this line, it causes valgrind warnings...
 642         //
 643         // MD_update(&m, buf, j);
 644         //
 645         //
 646         // ... ONLY JOKING! :-)
 647         //
 648
 649         return 0;
 650 }
 651
 652 MODULE_INIT(ModuleSSLOpenSSL)