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                         sslports = Conf->getString("advertisedports");
 163                         if (!sslports.empty())
 164                                 return;
 165
 166                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 167                         {
 168                                 ListenSocket* port = ServerInstance->ports[i];
 169                                 if (port->bind_tag->getString("ssl") != "openssl")
 170                                         continue;
 171
 172                                 const std::string& portid = port->bind_desc;
 173                                 ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
 174
 175                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 176                                 {
 177                                         /*
 178                                          * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
 179                                          * the IP:port in ISUPPORT.
 180                                          *
 181                                          * We used to advertise all ports seperated by a ';' char that matched the above criteria,
 182                                          * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
 183                                          * To solve this by default we now only display the first IP:port found and let the user
 184                                          * configure the exact value for the 005 token, if necessary.
 185                                          */
 186                                         sslports = portid;
 187                                         break;
 188                                 }
 189                         }
 190                 }
 191         }
 192
 193         void OnModuleRehash(User* user, const std::string &param)
 194         {
 195                 if (param != "ssl")
 196                         return;
 197
 198                 std::string keyfile;
 199                 std::string certfile;
 200                 std::string cafile;
 201                 std::string dhfile;
 202                 OnRehash(user);
 203
 204                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 205
 206                 cafile   = conf->getString("cafile", "conf/ca.pem");
 207                 certfile = conf->getString("certfile", "conf/cert.pem");
 208                 keyfile  = conf->getString("keyfile", "conf/key.pem");
 209                 dhfile   = conf->getString("dhfile", "conf/dhparams.pem");
 210                 std::string hash = conf->getString("hash", "md5");
 211                 if (hash != "sha1" && hash != "md5")
 212                         throw ModuleException("Unknown hash type " + hash);
 213                 use_sha = (hash == "sha1");
 214
 215                 std::string ciphers = conf->getString("ciphers", "");
 216
 217                 if (!ciphers.empty())
 218                 {
 219                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 220                         {
 221                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
 222                                 ERR_print_errors_cb(error_callback, this);
 223                         }
 224                 }
 225
 226                 /* Load our keys and certificates
 227                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 228                  */
 229                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 230                 {
 231                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 232                         ERR_print_errors_cb(error_callback, this);
 233                 }
 234
 235                 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)))
 236                 {
 237                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 238                         ERR_print_errors_cb(error_callback, this);
 239                 }
 240
 241                 /* Load the CAs we trust*/
 242                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 243                 {
 244                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read CA list from %s. %s", cafile.c_str(), strerror(errno));
 245                         ERR_print_errors_cb(error_callback, this);
 246                 }
 247
 248                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 249                 DH* ret;
 250
 251                 if (dhpfile == NULL)
 252                 {
 253                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 254                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 255                 }
 256                 else
 257                 {
 258                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 259                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 260                         {
 261                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 262                                 ERR_print_errors_cb(error_callback, this);
 263                         }
 264                 }
 265
 266                 fclose(dhpfile);
 267         }
 268
 269         void On005Numeric(std::string &output)
 270         {
 271                 if (!sslports.empty())
 272                         output.append(" SSL=" + sslports);
 273         }
 274
 275         ~ModuleSSLOpenSSL()
 276         {
 277                 SSL_CTX_free(ctx);
 278                 SSL_CTX_free(clictx);
 279                 delete[] sessions;
 280         }
 281
 282         void OnUserConnect(LocalUser* user)
 283         {
 284                 if (user->eh.GetIOHook() == this)
 285                 {
 286                         if (sessions[user->eh.GetFd()].sess)
 287                         {
 288                                 if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
 289                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
 290                                                 " 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());
 291                                 else
 292                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess));
 293                         }
 294                 }
 295         }
 296
 297         void OnCleanup(int target_type, void* item)
 298         {
 299                 if (target_type == TYPE_USER)
 300                 {
 301                         LocalUser* user = IS_LOCAL((User*)item);
 302
 303                         if (user && user->eh.GetIOHook() == this)
 304                         {
 305                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 306                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 307                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 308                         }
 309                 }
 310         }
 311
 312         Version GetVersion()
 313         {
 314                 return Version("Provides SSL support for clients", VF_VENDOR);
 315         }
 316
 317         void OnRequest(Request& request)
 318         {
 319                 if (strcmp("GET_SSL_CERT", request.id) == 0)
 320                 {
 321                         SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
 322                         int fd = req.sock->GetFd();
 323                         issl_session* session = &sessions[fd];
 324
 325                         req.cert = session->cert;
 326                 }
 327         }
 328
 329         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
 330         {
 331                 int fd = user->GetFd();
 332
 333                 issl_session* session = &sessions[fd];
 334
 335                 session->fd = fd;
 336                 session->sess = SSL_new(ctx);
 337                 session->status = ISSL_NONE;
 338                 session->outbound = false;
 339                 session->cert = NULL;
 340
 341                 if (session->sess == NULL)
 342                         return;
 343
 344                 if (SSL_set_fd(session->sess, fd) == 0)
 345                 {
 346                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 347                         return;
 348                 }
 349
 350                 Handshake(user, session);
 351         }
 352
 353         void OnStreamSocketConnect(StreamSocket* user)
 354         {
 355                 int fd = user->GetFd();
 356                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 357                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
 358                         return;
 359
 360                 issl_session* session = &sessions[fd];
 361
 362                 session->fd = fd;
 363                 session->sess = SSL_new(clictx);
 364                 session->status = ISSL_NONE;
 365                 session->outbound = true;
 366
 367                 if (session->sess == NULL)
 368                         return;
 369
 370                 if (SSL_set_fd(session->sess, fd) == 0)
 371                 {
 372                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 373                         return;
 374                 }
 375
 376                 Handshake(user, session);
 377         }
 378
 379         void OnStreamSocketClose(StreamSocket* user)
 380         {
 381                 int fd = user->GetFd();
 382                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 383                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 384                         return;
 385
 386                 CloseSession(&sessions[fd]);
 387         }
 388
 389         int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
 390         {
 391                 int fd = user->GetFd();
 392                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 393                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 394                         return -1;
 395
 396                 issl_session* session = &sessions[fd];
 397
 398                 if (!session->sess)
 399                 {
 400                         CloseSession(session);
 401                         return -1;
 402                 }
 403
 404                 if (session->status == ISSL_HANDSHAKING)
 405                 {
 406                         // The handshake isn't finished and it wants to read, try to finish it.
 407                         if (!Handshake(user, session))
 408                         {
 409                                 // Couldn't resume handshake.
 410                                 if (session->status == ISSL_NONE)
 411                                         return -1;
 412                                 return 0;
 413                         }
 414                 }
 415
 416                 // If we resumed the handshake then session->status will be ISSL_OPEN
 417
 418                 if (session->status == ISSL_OPEN)
 419                 {
 420                         char* buffer = ServerInstance->GetReadBuffer();
 421                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 422                         int ret = SSL_read(session->sess, buffer, bufsiz);
 423
 424                         if (ret > 0)
 425                         {
 426                                 recvq.append(buffer, ret);
 427                                 if (session->data_to_write)
 428                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 429                                 return 1;
 430                         }
 431                         else if (ret == 0)
 432                         {
 433                                 // Client closed connection.
 434                                 CloseSession(session);
 435                                 return -1;
 436                         }
 437                         else if (ret < 0)
 438                         {
 439                                 int err = SSL_get_error(session->sess, ret);
 440
 441                                 if (err == SSL_ERROR_WANT_READ)
 442                                 {
 443                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 444                                         return 0;
 445                                 }
 446                                 else if (err == SSL_ERROR_WANT_WRITE)
 447                                 {
 448                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 449                                         return 0;
 450                                 }
 451                                 else
 452                                 {
 453                                         CloseSession(session);
 454                                         return -1;
 455                                 }
 456                         }
 457                 }
 458
 459                 return 0;
 460         }
 461
 462         int OnStreamSocketWrite(StreamSocket* user, std::string& buffer)
 463         {
 464                 int fd = user->GetFd();
 465
 466                 issl_session* session = &sessions[fd];
 467
 468                 if (!session->sess)
 469                 {
 470                         CloseSession(session);
 471                         return -1;
 472                 }
 473
 474                 session->data_to_write = true;
 475
 476                 if (session->status == ISSL_HANDSHAKING)
 477                 {
 478                         if (!Handshake(user, session))
 479                         {
 480                                 // Couldn't resume handshake.
 481                                 if (session->status == ISSL_NONE)
 482                                         return -1;
 483                                 return 0;
 484                         }
 485                 }
 486
 487                 if (session->status == ISSL_OPEN)
 488                 {
 489                         int ret = SSL_write(session->sess, buffer.data(), buffer.size());
 490                         if (ret == (int)buffer.length())
 491                         {
 492                                 session->data_to_write = false;
 493                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 494                                 return 1;
 495                         }
 496                         else if (ret > 0)
 497                         {
 498                                 buffer = buffer.substr(ret);
 499                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 500                                 return 0;
 501                         }
 502                         else if (ret == 0)
 503                         {
 504                                 CloseSession(session);
 505                                 return -1;
 506                         }
 507                         else if (ret < 0)
 508                         {
 509                                 int err = SSL_get_error(session->sess, ret);
 510
 511                                 if (err == SSL_ERROR_WANT_WRITE)
 512                                 {
 513                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 514                                         return 0;
 515                                 }
 516                                 else if (err == SSL_ERROR_WANT_READ)
 517                                 {
 518                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 519                                         return 0;
 520                                 }
 521                                 else
 522                                 {
 523                                         CloseSession(session);
 524                                         return -1;
 525                                 }
 526                         }
 527                 }
 528                 return 0;
 529         }
 530
 531         bool Handshake(StreamSocket* user, issl_session* session)
 532         {
 533                 int ret;
 534
 535                 if (session->outbound)
 536                         ret = SSL_connect(session->sess);
 537                 else
 538                         ret = SSL_accept(session->sess);
 539
 540                 if (ret < 0)
 541                 {
 542                         int err = SSL_get_error(session->sess, ret);
 543
 544                         if (err == SSL_ERROR_WANT_READ)
 545                         {
 546                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 547                                 session->status = ISSL_HANDSHAKING;
 548                                 return true;
 549                         }
 550                         else if (err == SSL_ERROR_WANT_WRITE)
 551                         {
 552                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 553                                 session->status = ISSL_HANDSHAKING;
 554                                 return true;
 555                         }
 556                         else
 557                         {
 558                                 CloseSession(session);
 559                         }
 560
 561                         return false;
 562                 }
 563                 else if (ret > 0)
 564                 {
 565                         // Handshake complete.
 566                         VerifyCertificate(session, user);
 567
 568                         session->status = ISSL_OPEN;
 569
 570                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
 571
 572                         return true;
 573                 }
 574                 else if (ret == 0)
 575                 {
 576                         CloseSession(session);
 577                         return true;
 578                 }
 579
 580                 return true;
 581         }
 582
 583         void CloseSession(issl_session* session)
 584         {
 585                 if (session->sess)
 586                 {
 587                         SSL_shutdown(session->sess);
 588                         SSL_free(session->sess);
 589                 }
 590
 591                 session->sess = NULL;
 592                 session->status = ISSL_NONE;
 593                 errno = EIO;
 594         }
 595
 596         void VerifyCertificate(issl_session* session, StreamSocket* user)
 597         {
 598                 if (!session->sess || !user)
 599                         return;
 600
 601                 X509* cert;
 602                 ssl_cert* certinfo = new ssl_cert;
 603                 session->cert = certinfo;
 604                 unsigned int n;
 605                 unsigned char md[EVP_MAX_MD_SIZE];
 606                 const EVP_MD *digest = use_sha ? EVP_sha1() : EVP_md5();
 607
 608                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 609
 610                 if (!cert)
 611                 {
 612                         certinfo->error = "Could not get peer certificate: "+std::string(get_error());
 613                         return;
 614                 }
 615
 616                 certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
 617
 618                 if (SelfSigned)
 619                 {
 620                         certinfo->unknownsigner = false;
 621                         certinfo->trusted = true;
 622                 }
 623                 else
 624                 {
 625                         certinfo->unknownsigner = true;
 626                         certinfo->trusted = false;
 627                 }
 628
 629                 certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
 630                 certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
 631
 632                 if (!X509_digest(cert, digest, md, &n))
 633                 {
 634                         certinfo->error = "Out of memory generating fingerprint";
 635                 }
 636                 else
 637                 {
 638                         certinfo->fingerprint = irc::hex(md, n);
 639                 }
 640
 641                 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))
 642                 {
 643                         certinfo->error = "Not activated, or expired certificate";
 644                 }
 645
 646                 X509_free(cert);
 647         }
 648 };
 649
 650 static int error_callback(const char *str, size_t len, void *u)
 651 {
 652         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "SSL error: " + std::string(str, len - 1));
 653
 654         //
 655         // XXX: Remove this line, it causes valgrind warnings...
 656         //
 657         // MD_update(&m, buf, j);
 658         //
 659         //
 660         // ... ONLY JOKING! :-)
 661         //
 662
 663         return 0;
 664 }
 665
 666 MODULE_INIT(ModuleSSLOpenSSL)