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 <openssl/ssl.h>
  35 #include <openssl/err.h>
  36 #include "ssl.h"
  37
  38 #ifdef _WIN32
  39 # pragma comment(lib, "libcrypto.lib")
  40 # pragma comment(lib, "libssl.lib")
  41 # pragma comment(lib, "user32.lib")
  42 # pragma comment(lib, "advapi32.lib")
  43 # pragma comment(lib, "libgcc.lib")
  44 # pragma comment(lib, "libmingwex.lib")
  45 # pragma comment(lib, "gdi32.lib")
  46 # undef MAX_DESCRIPTORS
  47 # define MAX_DESCRIPTORS 10000
  48 #endif
  49
  50 /* $ModDesc: Provides SSL support for clients */
  51
  52 /* $LinkerFlags: if("USE_FREEBSD_BASE_SSL") -lssl -lcrypto */
  53 /* $CompileFlags: if(!"USE_FREEBSD_BASE_SSL") pkgconfversion("openssl","0.9.7") pkgconfincludes("openssl","/openssl/ssl.h","") */
  54 /* $LinkerFlags: if(!"USE_FREEBSD_BASE_SSL") rpath("pkg-config --libs openssl") pkgconflibs("openssl","/libssl.so","-lssl -lcrypto -ldl") */
  55
  56 /* $NoPedantic */
  57
  58
  59 enum issl_status { ISSL_NONE, ISSL_HANDSHAKING, ISSL_OPEN };
  60
  61 static bool SelfSigned = false;
  62
  63 char* get_error()
  64 {
  65         return ERR_error_string(ERR_get_error(), NULL);
  66 }
  67
  68 static int error_callback(const char *str, size_t len, void *u);
  69
  70 /** Represents an SSL user's extra data
  71  */
  72 class issl_session
  73 {
  74 public:
  75         SSL* sess;
  76         issl_status status;
  77         reference<ssl_cert> cert;
  78
  79         bool outbound;
  80         bool data_to_write;
  81
  82         issl_session()
  83         {
  84                 outbound = false;
  85                 data_to_write = false;
  86         }
  87 };
  88
  89 static int OnVerify(int preverify_ok, X509_STORE_CTX *ctx)
  90 {
  91         /* XXX: This will allow self signed certificates.
  92          * In the future if we want an option to not allow this,
  93          * we can just return preverify_ok here, and openssl
  94          * will boot off self-signed and invalid peer certs.
  95          */
  96         int ve = X509_STORE_CTX_get_error(ctx);
  97
  98         SelfSigned = (ve == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT);
  99
 100         return 1;
 101 }
 102
 103 class ModuleSSLOpenSSL : public Module
 104 {
 105         issl_session* sessions;
 106
 107         SSL_CTX* ctx;
 108         SSL_CTX* clictx;
 109
 110         std::string sslports;
 111         bool use_sha;
 112
 113         ServiceProvider iohook;
 114  public:
 115
 116         ModuleSSLOpenSSL() : iohook(this, "ssl/openssl", SERVICE_IOHOOK)
 117         {
 118                 sessions = new issl_session[ServerInstance->SE->GetMaxFds()];
 119
 120                 /* Global SSL library initialization*/
 121                 SSL_library_init();
 122                 SSL_load_error_strings();
 123
 124                 /* Build our SSL contexts:
 125                  * NOTE: OpenSSL makes us have two contexts, one for servers and one for clients. ICK.
 126                  */
 127                 ctx = SSL_CTX_new( SSLv23_server_method() );
 128                 clictx = SSL_CTX_new( SSLv23_client_method() );
 129
 130                 SSL_CTX_set_mode(ctx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 131                 SSL_CTX_set_mode(clictx, SSL_MODE_ENABLE_PARTIAL_WRITE | SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
 132
 133                 SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 134                 SSL_CTX_set_verify(clictx, SSL_VERIFY_PEER | SSL_VERIFY_CLIENT_ONCE, OnVerify);
 135
 136                 const unsigned char session_id[] = "inspircd";
 137                 SSL_CTX_set_session_id_context(ctx, session_id, sizeof(session_id) - 1);
 138         }
 139
 140         void init()
 141         {
 142                 // Needs the flag as it ignores a plain /rehash
 143                 OnModuleRehash(NULL,"ssl");
 144                 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect };
 145                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 146                 ServerInstance->Modules->AddService(iohook);
 147         }
 148
 149         void OnHookIO(StreamSocket* user, ListenSocket* lsb)
 150         {
 151                 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl")
 152                 {
 153                         /* Hook the user with our module */
 154                         user->AddIOHook(this);
 155                 }
 156         }
 157
 158         void OnRehash(User* user)
 159         {
 160                 sslports.clear();
 161
 162                 ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
 163
 164                 if (Conf->getBool("showports", true))
 165                 {
 166                         sslports = Conf->getString("advertisedports");
 167                         if (!sslports.empty())
 168                                 return;
 169
 170                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 171                         {
 172                                 ListenSocket* port = ServerInstance->ports[i];
 173                                 if (port->bind_tag->getString("ssl") != "openssl")
 174                                         continue;
 175
 176                                 const std::string& portid = port->bind_desc;
 177                                 ServerInstance->Logs->Log("m_ssl_openssl", DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
 178
 179                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 180                                 {
 181                                         /*
 182                                          * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
 183                                          * the IP:port in ISUPPORT.
 184                                          *
 185                                          * We used to advertise all ports seperated by a ';' char that matched the above criteria,
 186                                          * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
 187                                          * To solve this by default we now only display the first IP:port found and let the user
 188                                          * configure the exact value for the 005 token, if necessary.
 189                                          */
 190                                         sslports = portid;
 191                                         break;
 192                                 }
 193                         }
 194                 }
 195         }
 196
 197         void OnModuleRehash(User* user, const std::string &param)
 198         {
 199                 if (param != "ssl")
 200                         return;
 201
 202                 std::string keyfile;
 203                 std::string certfile;
 204                 std::string cafile;
 205                 std::string dhfile;
 206                 OnRehash(user);
 207
 208                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 209
 210                 cafile   = conf->getString("cafile", CONFIG_PATH "/ca.pem");
 211                 certfile = conf->getString("certfile", CONFIG_PATH "/cert.pem");
 212                 keyfile  = conf->getString("keyfile", CONFIG_PATH "/key.pem");
 213                 dhfile   = conf->getString("dhfile", CONFIG_PATH "/dhparams.pem");
 214                 std::string hash = conf->getString("hash", "md5");
 215                 if (hash != "sha1" && hash != "md5")
 216                         throw ModuleException("Unknown hash type " + hash);
 217                 use_sha = (hash == "sha1");
 218
 219                 std::string ciphers = conf->getString("ciphers", "");
 220
 221                 if (!ciphers.empty())
 222                 {
 223                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 224                         {
 225                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
 226                                 ERR_print_errors_cb(error_callback, this);
 227                         }
 228                 }
 229
 230                 /* Load our keys and certificates
 231                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 232                  */
 233                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 234                 {
 235                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 236                         ERR_print_errors_cb(error_callback, this);
 237                 }
 238
 239                 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)))
 240                 {
 241                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 242                         ERR_print_errors_cb(error_callback, this);
 243                 }
 244
 245                 /* Load the CAs we trust*/
 246                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 247                 {
 248                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: 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));
 249                         ERR_print_errors_cb(error_callback, this);
 250                 }
 251
 252                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 253                 DH* ret;
 254
 255                 if (dhpfile == NULL)
 256                 {
 257                         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 258                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 259                 }
 260                 else
 261                 {
 262                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 263                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 264                         {
 265                                 ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 266                                 ERR_print_errors_cb(error_callback, this);
 267                         }
 268                 }
 269
 270                 fclose(dhpfile);
 271         }
 272
 273         void On005Numeric(std::string &output)
 274         {
 275                 if (!sslports.empty())
 276                         output.append(" SSL=" + sslports);
 277         }
 278
 279         ~ModuleSSLOpenSSL()
 280         {
 281                 SSL_CTX_free(ctx);
 282                 SSL_CTX_free(clictx);
 283                 delete[] sessions;
 284         }
 285
 286         void OnUserConnect(LocalUser* user)
 287         {
 288                 if (user->eh.GetIOHook() == this)
 289                 {
 290                         if (sessions[user->eh.GetFd()].sess)
 291                         {
 292                                 if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
 293                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\""
 294                                                 " 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());
 295                                 else
 296                                         user->WriteServ("NOTICE %s :*** You are connected using SSL cipher \"%s\"", user->nick.c_str(), SSL_get_cipher(sessions[user->eh.GetFd()].sess));
 297                         }
 298                 }
 299         }
 300
 301         void OnCleanup(int target_type, void* item)
 302         {
 303                 if (target_type == TYPE_USER)
 304                 {
 305                         LocalUser* user = IS_LOCAL((User*)item);
 306
 307                         if (user && user->eh.GetIOHook() == this)
 308                         {
 309                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 310                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 311                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 312                         }
 313                 }
 314         }
 315
 316         Version GetVersion()
 317         {
 318                 return Version("Provides SSL support for clients", VF_VENDOR);
 319         }
 320
 321         void OnRequest(Request& request)
 322         {
 323                 if (strcmp("GET_SSL_CERT", request.id) == 0)
 324                 {
 325                         SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
 326                         int fd = req.sock->GetFd();
 327                         issl_session* session = &sessions[fd];
 328
 329                         req.cert = session->cert;
 330                 }
 331         }
 332
 333         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
 334         {
 335                 int fd = user->GetFd();
 336
 337                 issl_session* session = &sessions[fd];
 338
 339                 session->sess = SSL_new(ctx);
 340                 session->status = ISSL_NONE;
 341                 session->outbound = false;
 342                 session->cert = NULL;
 343
 344                 if (session->sess == NULL)
 345                         return;
 346
 347                 if (SSL_set_fd(session->sess, fd) == 0)
 348                 {
 349                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 350                         return;
 351                 }
 352
 353                 Handshake(user, session);
 354         }
 355
 356         void OnStreamSocketConnect(StreamSocket* user)
 357         {
 358                 int fd = user->GetFd();
 359                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 360                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() -1))
 361                         return;
 362
 363                 issl_session* session = &sessions[fd];
 364
 365                 session->sess = SSL_new(clictx);
 366                 session->status = ISSL_NONE;
 367                 session->outbound = true;
 368
 369                 if (session->sess == NULL)
 370                         return;
 371
 372                 if (SSL_set_fd(session->sess, fd) == 0)
 373                 {
 374                         ServerInstance->Logs->Log("m_ssl_openssl",DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 375                         return;
 376                 }
 377
 378                 Handshake(user, session);
 379         }
 380
 381         void OnStreamSocketClose(StreamSocket* user)
 382         {
 383                 int fd = user->GetFd();
 384                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 385                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 386                         return;
 387
 388                 CloseSession(&sessions[fd]);
 389         }
 390
 391         int OnStreamSocketRead(StreamSocket* user, std::string& recvq)
 392         {
 393                 int fd = user->GetFd();
 394                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 395                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 396                         return -1;
 397
 398                 issl_session* session = &sessions[fd];
 399
 400                 if (!session->sess)
 401                 {
 402                         CloseSession(session);
 403                         return -1;
 404                 }
 405
 406                 if (session->status == ISSL_HANDSHAKING)
 407                 {
 408                         // The handshake isn't finished and it wants to read, try to finish it.
 409                         if (!Handshake(user, session))
 410                         {
 411                                 // Couldn't resume handshake.
 412                                 if (session->status == ISSL_NONE)
 413                                         return -1;
 414                                 return 0;
 415                         }
 416                 }
 417
 418                 // If we resumed the handshake then session->status will be ISSL_OPEN
 419
 420                 if (session->status == ISSL_OPEN)
 421                 {
 422                         char* buffer = ServerInstance->GetReadBuffer();
 423                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 424                         int ret = SSL_read(session->sess, buffer, bufsiz);
 425
 426                         if (ret > 0)
 427                         {
 428                                 recvq.append(buffer, ret);
 429                                 if (session->data_to_write)
 430                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 431                                 return 1;
 432                         }
 433                         else if (ret == 0)
 434                         {
 435                                 // Client closed connection.
 436                                 CloseSession(session);
 437                                 user->SetError("Connection closed");
 438                                 return -1;
 439                         }
 440                         else if (ret < 0)
 441                         {
 442                                 int err = SSL_get_error(session->sess, ret);
 443
 444                                 if (err == SSL_ERROR_WANT_READ)
 445                                 {
 446                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 447                                         return 0;
 448                                 }
 449                                 else if (err == SSL_ERROR_WANT_WRITE)
 450                                 {
 451                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 452                                         return 0;
 453                                 }
 454                                 else
 455                                 {
 456                                         CloseSession(session);
 457                                         return -1;
 458                                 }
 459                         }
 460                 }
 461
 462                 return 0;
 463         }
 464
 465         int OnStreamSocketWrite(StreamSocket* user, std::string& buffer)
 466         {
 467                 int fd = user->GetFd();
 468
 469                 issl_session* session = &sessions[fd];
 470
 471                 if (!session->sess)
 472                 {
 473                         CloseSession(session);
 474                         return -1;
 475                 }
 476
 477                 session->data_to_write = true;
 478
 479                 if (session->status == ISSL_HANDSHAKING)
 480                 {
 481                         if (!Handshake(user, session))
 482                         {
 483                                 // Couldn't resume handshake.
 484                                 if (session->status == ISSL_NONE)
 485                                         return -1;
 486                                 return 0;
 487                         }
 488                 }
 489
 490                 if (session->status == ISSL_OPEN)
 491                 {
 492                         int ret = SSL_write(session->sess, buffer.data(), buffer.size());
 493                         if (ret == (int)buffer.length())
 494                         {
 495                                 session->data_to_write = false;
 496                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 497                                 return 1;
 498                         }
 499                         else if (ret > 0)
 500                         {
 501                                 buffer = buffer.substr(ret);
 502                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 503                                 return 0;
 504                         }
 505                         else if (ret == 0)
 506                         {
 507                                 CloseSession(session);
 508                                 return -1;
 509                         }
 510                         else if (ret < 0)
 511                         {
 512                                 int err = SSL_get_error(session->sess, ret);
 513
 514                                 if (err == SSL_ERROR_WANT_WRITE)
 515                                 {
 516                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_SINGLE_WRITE);
 517                                         return 0;
 518                                 }
 519                                 else if (err == SSL_ERROR_WANT_READ)
 520                                 {
 521                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ);
 522                                         return 0;
 523                                 }
 524                                 else
 525                                 {
 526                                         CloseSession(session);
 527                                         return -1;
 528                                 }
 529                         }
 530                 }
 531                 return 0;
 532         }
 533
 534         bool Handshake(StreamSocket* user, issl_session* session)
 535         {
 536                 int ret;
 537
 538                 if (session->outbound)
 539                         ret = SSL_connect(session->sess);
 540                 else
 541                         ret = SSL_accept(session->sess);
 542
 543                 if (ret < 0)
 544                 {
 545                         int err = SSL_get_error(session->sess, ret);
 546
 547                         if (err == SSL_ERROR_WANT_READ)
 548                         {
 549                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE);
 550                                 session->status = ISSL_HANDSHAKING;
 551                                 return true;
 552                         }
 553                         else if (err == SSL_ERROR_WANT_WRITE)
 554                         {
 555                                 ServerInstance->SE->ChangeEventMask(user, FD_WANT_NO_READ | FD_WANT_SINGLE_WRITE);
 556                                 session->status = ISSL_HANDSHAKING;
 557                                 return true;
 558                         }
 559                         else
 560                         {
 561                                 CloseSession(session);
 562                         }
 563
 564                         return false;
 565                 }
 566                 else if (ret > 0)
 567                 {
 568                         // Handshake complete.
 569                         VerifyCertificate(session, user);
 570
 571                         session->status = ISSL_OPEN;
 572
 573                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_NO_WRITE | FD_ADD_TRIAL_WRITE);
 574
 575                         return true;
 576                 }
 577                 else if (ret == 0)
 578                 {
 579                         CloseSession(session);
 580                         return true;
 581                 }
 582
 583                 return true;
 584         }
 585
 586         void CloseSession(issl_session* session)
 587         {
 588                 if (session->sess)
 589                 {
 590                         SSL_shutdown(session->sess);
 591                         SSL_free(session->sess);
 592                 }
 593
 594                 session->sess = NULL;
 595                 session->status = ISSL_NONE;
 596                 errno = EIO;
 597         }
 598
 599         void VerifyCertificate(issl_session* session, StreamSocket* user)
 600         {
 601                 if (!session->sess || !user)
 602                         return;
 603
 604                 X509* cert;
 605                 ssl_cert* certinfo = new ssl_cert;
 606                 session->cert = certinfo;
 607                 unsigned int n;
 608                 unsigned char md[EVP_MAX_MD_SIZE];
 609                 const EVP_MD *digest = use_sha ? EVP_sha1() : EVP_md5();
 610
 611                 cert = SSL_get_peer_certificate((SSL*)session->sess);
 612
 613                 if (!cert)
 614                 {
 615                         certinfo->error = "Could not get peer certificate: "+std::string(get_error());
 616                         return;
 617                 }
 618
 619                 certinfo->invalid = (SSL_get_verify_result(session->sess) != X509_V_OK);
 620
 621                 if (!SelfSigned)
 622                 {
 623                         certinfo->unknownsigner = false;
 624                         certinfo->trusted = true;
 625                 }
 626                 else
 627                 {
 628                         certinfo->unknownsigner = true;
 629                         certinfo->trusted = false;
 630                 }
 631
 632                 certinfo->dn = X509_NAME_oneline(X509_get_subject_name(cert),0,0);
 633                 certinfo->issuer = X509_NAME_oneline(X509_get_issuer_name(cert),0,0);
 634
 635                 if (!X509_digest(cert, digest, md, &n))
 636                 {
 637                         certinfo->error = "Out of memory generating fingerprint";
 638                 }
 639                 else
 640                 {
 641                         certinfo->fingerprint = irc::hex(md, n);
 642                 }
 643
 644                 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))
 645                 {
 646                         certinfo->error = "Not activated, or expired certificate";
 647                 }
 648
 649                 X509_free(cert);
 650         }
 651 };
 652
 653 static int error_callback(const char *str, size_t len, void *u)
 654 {
 655         ServerInstance->Logs->Log("m_ssl_openssl",DEFAULT, "SSL error: " + std::string(str, len - 1));
 656
 657         //
 658         // XXX: Remove this line, it causes valgrind warnings...
 659         //
 660         // MD_update(&m, buf, j);
 661         //
 662         //
 663         // ... ONLY JOKING! :-)
 664         //
 665
 666         return 0;
 667 }
 668
 669 MODULE_INIT(ModuleSSLOpenSSL)