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 _WIN32
  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         bool outbound;
  72         bool data_to_write;
  73
  74         issl_session()
  75         {
  76                 outbound = false;
  77                 data_to_write = false;
  78         }
  79 };
  80
  81 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  82 {
  83         /* XXX: This will allow self signed certificates.
  84          * In the future if we want an option to not allow this,
  85          * we can just return preverify_ok here, and openssl
  86          * will boot off self-signed and invalid peer certs.
  87          */
  88         int ve = X509_STORE_CTX_get_error(ctx);
  89
  90         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  91
  92         return 1;
  93 }
  94
  95 class ModuleSSLOpenSSL : public Module
  96 {
  97         issl_session* sessions;
  98
  99         SSL_CTX* ctx;
 100         SSL_CTX* clictx;
 101
 102         std::string sslports;
 103         bool use_sha;
 104
 105         ServiceProvider iohook;
 106  public:
 107
 108         ModuleSSLOpenSSL() : iohook(this, "ssl/openssl", SERVICE_IOHOOK)
 109         {
 110                 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
 111
 112                 /* Global SSL library initialization*/
 113                 SSL_library_init();
 114                 SSL_load_error_strings();
 115
 116                 /* Build our SSL contexts:
 117                  * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
 118                  */
 119                 ctx = SSL_CTX_new( SSLv23_server_method() );
 120                 clictx = SSL_CTX_new( SSLv23_client_method() );
 121
 122                 SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 123                 SSL_CTX_set_mode(clictx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 124
 125                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 126                 SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 127         }
 128
 129         void init()
 130         {
 131                 // Needs the flag as it ignores a plain /rehash
 132                 OnModuleRehash(NULL,"ssl");
 133                 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect };
 134                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 135                 ServerInstance->Modules->AddService(iohook);
 136         }
 137
 138         void OnHookIO(StreamSocket* user, ListenSocket* lsb)
 139         {
 140                 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl")
 141                 {
 142                         /* Hook the user with our module */
 143                         user->AddIOHook(this);
 144                 }
 145         }
 146
 147         void OnRehash(User* user)
 148         {
 149                 sslports.clear();
 150
 151                 ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
 152
 153                 if (Conf->getBool("showports", true))
 154                 {
 155                         sslports = Conf->getString("advertisedports");
 156                         if (!sslports.empty())
 157                                 return;
 158
 159                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 160                         {
 161                                 ListenSocket* port = ServerInstance->ports[i];
 162                                 if (port->bind_tag->getString("ssl") != "openssl")
 163                                         continue;
 164
 165                                 const std::string& portid = port->bind_desc;
 166                                 ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
 167
 168                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 169                                 {
 170                                         /*
 171                                          * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
 172                                          * the IP:port in ISUPPORT.
 173                                          *
 174                                          * We used to advertise all ports seperated by a ';' char that matched the above criteria,
 175                                          * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
 176                                          * To solve this by default we now only display the first IP:port found and let the user
 177                                          * configure the exact value for the 005 token, if necessary.
 178                                          */
 179                                         sslports = portid;
 180                                         break;
 181                                 }
 182                         }
 183                 }
 184         }
 185
 186         void OnModuleRehash(User* user, const std::string &param)
 187         {
 188                 if (param != "ssl")
 189                         return;
 190
 191                 std::string keyfile;
 192                 std::string certfile;
 193                 std::string cafile;
 194                 std::string dhfile;
 195                 OnRehash(user);
 196
 197                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 198
 199                 cafile   = conf->getString("cafile", CONFIG_PATH "/ca.pem");
 200                 certfile = conf->getString("certfile", CONFIG_PATH "/cert.pem");
 201                 keyfile  = conf->getString("keyfile", CONFIG_PATH "/key.pem");
 202                 dhfile   = conf->getString("dhfile", CONFIG_PATH "/dhparams.pem");
 203                 std::string hash = conf->getString("hash", "md5");
 204                 if (hash != "sha1" && hash != "md5")
 205                         throw ModuleException("Unknown hash type " + hash);
 206                 use_sha = (hash == "sha1");
 207
 208                 std::string ciphers = conf->getString("ciphers", "");
 209
 210                 if (!ciphers.empty())
 211                 {
 212                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 213                         {
 214                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
 215                                 ERR_print_errors_cb(error_callback, this);
 216                         }
 217                 }
 218
 219                 /* Load our keys and certificates
 220                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 221                  */
 222                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 223                 {
 224                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 225                         ERR_print_errors_cb(error_callback, this);
 226                 }
 227
 228                 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)))
 229                 {
 230                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 231                         ERR_print_errors_cb(error_callback, this);
 232                 }
 233
 234                 /* Load the CAs we trust*/
 235                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 236                 {
 237                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));
 238                         ERR_print_errors_cb(error_callback, this);
 239                 }
 240
 241                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 242                 DH* ret;
 243
 244                 if (dhpfile == NULL)
 245                 {
 246                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 247                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 248                 }
 249                 else
 250                 {
 251                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 252                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 253                         {
 254                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 255                                 ERR_print_errors_cb(error_callback, this);
 256                         }
 257                 }
 258
 259                 fclose(dhpfile);
 260         }
 261
 262         void On005Numeric(std::string &output)
 263         {
 264                 if (!sslports.empty())
 265                         output.append(" SSL=" + sslports);
 266         }
 267
 268         ~ModuleSSLOpenSSL()
 269         {
 270                 SSL_CTX_free(ctx);
 271                 SSL_CTX_free(clictx);
 272                 delete[] sessions;
 273         }
 274
 275         void OnUserConnect(LocalUser* user)
 276         {
 277                 if (user->eh.GetIOHook() == this)
 278                 {
 279                         if (sessions[user->eh.GetFd()].sess)
 280                         {
 281                                 if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
 282                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
 283                                                 " 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());
 284                                 else
 285                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess));
 286                         }
 287                 }
 288         }
 289
 290         void OnCleanup(int target_type, void* item)
 291         {
 292                 if (target_type == TYPE_USER)
 293                 {
 294                         LocalUser* user = IS_LOCAL((User*)item);
 295
 296                         if (user && user->eh.GetIOHook() == this)
 297                         {
 298                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 299                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 300                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 301                         }
 302                 }
 303         }
 304
 305         Version GetVersion()
 306         {
 307                 return Version("Provides SSL support for clients", VF_VENDOR);
 308         }
 309
 310         void OnRequest(Request& request)
 311         {
 312                 if (strcmp("GET_SSL_CERT", request.id) == 0)
 313                 {
 314                         SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
 315                         int fd = req.sock->GetFd();
 316                         issl_session* session = &sessions[fd];
 317
 318                         req.cert = session->cert;
 319                 }
 320         }
 321
 322         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
 323         {
 324                 int fd = user->GetFd();
 325
 326                 issl_session* session = &sessions[fd];
 327
 328                 session->sess = SSL_new(ctx);
 329                 session->status = ISSL_NONE;
 330                 session->outbound = false;
 331                 session->cert = NULL;
 332
 333                 if (session->sess == NULL)
 334                         return;
 335
 336                 if (SSL_set_fd(session->sess, fd) == 0)
 337                 {
 338                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 339                         return;
 340                 }
 341
 342                 Handshake(user, session);
 343         }
 344
 345         void OnStreamSocketConnect(StreamSocket* user)
 346         {
 347                 int fd = user->GetFd();
 348                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 349                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
 350                         return;
 351
 352                 issl_session* session = &sessions[fd];
 353
 354                 session->sess = SSL_new(clictx);
 355                 session->status = ISSL_NONE;
 356                 session->outbound = true;
 357
 358                 if (session->sess == NULL)
 359                         return;
 360
 361                 if (SSL_set_fd(session->sess, fd) == 0)
 362                 {
 363                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 364                         return;
 365                 }
 366
 367                 Handshake(user, session);
 368         }
 369
 370         void OnStreamSocketClose(StreamSocket* user)
 371         {
 372                 int fd = user->GetFd();
 373                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 374                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 375                         return;
 376
 377                 CloseSession(&sessions[fd]);
 378         }
 379
 380         int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
 381         {
 382                 int fd = user->GetFd();
 383                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 384                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 385                         return -1;
 386
 387                 issl_session* session = &sessions[fd];
 388
 389                 if (!session->sess)
 390                 {
 391                         CloseSession(session);
 392                         return -1;
 393                 }
 394
 395                 if (session->status == ISSL_HANDSHAKING)
 396                 {
 397                         // The handshake isn't finished and it wants to read, try to finish it.
 398                         if (!Handshake(user, session))
 399                         {
 400                                 // Couldn't resume handshake.
 401                                 if (session->status == ISSL_NONE)
 402                                         return -1;
 403                                 return 0;
 404                         }
 405                 }
 406
 407                 // If we resumed the handshake then session->status will be ISSL_OPEN
 408
 409                 if (session->status == ISSL_OPEN)
 410                 {
 411                         char* buffer = ServerInstance->GetReadBuffer();
 412                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 413                         int ret = SSL_read(session->sess, buffer, bufsiz);
 414
 415                         if (ret > 0)
 416                         {
 417                                 recvq.append(buffer, ret);
 418                                 if (session->data_to_write)
 419                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 420                                 return 1;
 421                         }
 422                         else if (ret == 0)
 423                         {
 424                                 // Client closed connection.
 425                                 CloseSession(session);
 426                                 user->SetError("Connection closed");
 427                                 return -1;
 428                         }
 429                         else if (ret < 0)
 430                         {
 431                                 int err = SSL_get_error(session->sess, ret);
 432
 433                                 if (err == SSL_ERROR_WANT_READ)
 434                                 {
 435                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 436                                         return 0;
 437                                 }
 438                                 else if (err == SSL_ERROR_WANT_WRITE)
 439                                 {
 440                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 441                                         return 0;
 442                                 }
 443                                 else
 444                                 {
 445                                         CloseSession(session);
 446                                         return -1;
 447                                 }
 448                         }
 449                 }
 450
 451                 return 0;
 452         }
 453
 454         int OnStreamSocketWrite(StreamSocket* user, std::string& buffer)
 455         {
 456                 int fd = user->GetFd();
 457
 458                 issl_session* session = &sessions[fd];
 459
 460                 if (!session->sess)
 461                 {
 462                         CloseSession(session);
 463                         return -1;
 464                 }
 465
 466                 session->data_to_write = true;
 467
 468                 if (session->status == ISSL_HANDSHAKING)
 469                 {
 470                         if (!Handshake(user, session))
 471                         {
 472                                 // Couldn't resume handshake.
 473                                 if (session->status == ISSL_NONE)
 474                                         return -1;
 475                                 return 0;
 476                         }
 477                 }
 478
 479                 if (session->status == ISSL_OPEN)
 480                 {
 481                         int ret = SSL_write(session->sess, buffer.data(), buffer.size());
 482                         if (ret == (int)buffer.length())
 483                         {
 484                                 session->data_to_write = false;
 485                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 486                                 return 1;
 487                         }
 488                         else if (ret > 0)
 489                         {
 490                                 buffer = buffer.substr(ret);
 491                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 492                                 return 0;
 493                         }
 494                         else if (ret == 0)
 495                         {
 496                                 CloseSession(session);
 497                                 return -1;
 498                         }
 499                         else if (ret < 0)
 500                         {
 501                                 int err = SSL_get_error(session->sess, ret);
 502
 503                                 if (err == SSL_ERROR_WANT_WRITE)
 504                                 {
 505                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 506                                         return 0;
 507                                 }
 508                                 else if (err == SSL_ERROR_WANT_READ)
 509                                 {
 510                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 511                                         return 0;
 512                                 }
 513                                 else
 514                                 {
 515                                         CloseSession(session);
 516                                         return -1;
 517                                 }
 518                         }
 519                 }
 520                 return 0;
 521         }
 522
 523         bool Handshake(StreamSocket* user, issl_session* session)
 524         {
 525                 int ret;
 526
 527                 if (session->outbound)
 528                         ret = SSL_connect(session->sess);
 529                 else
 530                         ret = SSL_accept(session->sess);
 531
 532                 if (ret < 0)
 533                 {
 534                         int err = SSL_get_error(session->sess, ret);
 535
 536                         if (err == SSL_ERROR_WANT_READ)
 537                         {
 538                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 539                                 session->status = ISSL_HANDSHAKING;
 540                                 return true;
 541                         }
 542                         else if (err == SSL_ERROR_WANT_WRITE)
 543                         {
 544                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 545                                 session->status = ISSL_HANDSHAKING;
 546                                 return true;
 547                         }
 548                         else
 549                         {
 550                                 CloseSession(session);
 551                         }
 552
 553                         return false;
 554                 }
 555                 else if (ret > 0)
 556                 {
 557                         // Handshake complete.
 558                         VerifyCertificate(session, user);
 559
 560                         session->status = ISSL_OPEN;
 561
 562                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
 563
 564                         return true;
 565                 }
 566                 else if (ret == 0)
 567                 {
 568                         CloseSession(session);
 569                         return true;
 570                 }
 571
 572                 return true;
 573         }
 574
 575         void CloseSession(issl_session* session)
 576         {
 577                 if (session->sess)
 578                 {
 579                         SSL_shutdown(session->sess);
 580                         SSL_free(session->sess);
 581                 }
 582
 583                 session->sess = NULL;
 584                 session->status = ISSL_NONE;
 585                 errno = EIO;
 586         }
 587
 588         void VerifyCertificate(issl_session* session, StreamSocket* user)
 589         {
 590                 if (!session->sess || !user)
 591                         return;
 592
 593                 X509* cert;
 594                 ssl_cert* certinfo = new ssl_cert;
 595                 session->cert = certinfo;
 596                 unsigned int n;
 597                 unsigned char md[EVP_MAX_MD_SIZE];
 598                 const EVP_MD *digest = use_sha ? EVP_sha1() : EVP_md5();
 599
 600                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 601
 602                 if (!cert)
 603                 {
 604                         certinfo->error = "Could not get peer certificate: "+std::string(get_error());
 605                         return;
 606                 }
 607
 608                 certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
 609
 610                 if (SelfSigned)
 611                 {
 612                         certinfo->unknownsigner = false;
 613                         certinfo->trusted = true;
 614                 }
 615                 else
 616                 {
 617                         certinfo->unknownsigner = true;
 618                         certinfo->trusted = false;
 619                 }
 620
 621                 certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
 622                 certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
 623
 624                 if (!X509_digest(cert, digest, md, &n))
 625                 {
 626                         certinfo->error = "Out of memory generating fingerprint";
 627                 }
 628                 else
 629                 {
 630                         certinfo->fingerprint = irc::hex(md, n);
 631                 }
 632
 633                 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))
 634                 {
 635                         certinfo->error = "Not activated, or expired certificate";
 636                 }
 637
 638                 X509_free(cert);
 639         }
 640 };
 641
 642 static int error_callback(const char *str, size_t len, void *u)
 643 {
 644         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "SSL error: " + std::string(str, len - 1));
 645
 646         //
 647         // XXX: Remove this line, it causes valgrind warnings...
 648         //
 649         // MD_update(&m, buf, j);
 650         //
 651         //
 652         // ... ONLY JOKING! :-)
 653         //
 654
 655         return 0;
 656 }
 657
 658 MODULE_INIT(ModuleSSLOpenSSL)