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 "modules/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
 137         void init() CXX11_OVERRIDE
 138         {
 139                 // Needs the flag as it ignores a plain /rehash
 140                 OnModuleRehash(NULL,"ssl");
 141                 Implementation eventlist[] = { I_On005Numeric, I_OnRehash, I_OnModuleRehash, I_OnHookIO, I_OnUserConnect };
 142                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 143                 ServerInstance->Modules->AddService(iohook);
 144         }
 145
 146         void OnHookIO(StreamSocket* user, ListenSocket* lsb) CXX11_OVERRIDE
 147         {
 148                 if (!user->GetIOHook() && lsb->bind_tag->getString("ssl") == "openssl")
 149                 {
 150                         /* Hook the user with our module */
 151                         user->AddIOHook(this);
 152                 }
 153         }
 154
 155         void OnRehash(User* user) CXX11_OVERRIDE
 156         {
 157                 sslports.clear();
 158
 159                 ConfigTag* Conf = ServerInstance->Config->ConfValue("openssl");
 160
 161                 if (Conf->getBool("showports", true))
 162                 {
 163                         sslports = Conf->getString("advertisedports");
 164                         if (!sslports.empty())
 165                                 return;
 166
 167                         for (size_t i = 0; i < ServerInstance->ports.size(); i++)
 168                         {
 169                                 ListenSocket* port = ServerInstance->ports[i];
 170                                 if (port->bind_tag->getString("ssl") != "openssl")
 171                                         continue;
 172
 173                                 const std::string& portid = port->bind_desc;
 174                                 ServerInstance->Logs->Log("m_ssl_openssl", LOG_DEFAULT, "m_ssl_openssl.so: Enabling SSL for port %s", portid.c_str());
 175
 176                                 if (port->bind_tag->getString("type", "clients") == "clients" && port->bind_addr != "127.0.0.1")
 177                                 {
 178                                         /*
 179                                          * Found an SSL port for clients that is not bound to 127.0.0.1 and handled by us, display
 180                                          * the IP:port in ISUPPORT.
 181                                          *
 182                                          * We used to advertise all ports seperated by a ';' char that matched the above criteria,
 183                                          * but this resulted in too long ISUPPORT lines if there were lots of ports to be displayed.
 184                                          * To solve this by default we now only display the first IP:port found and let the user
 185                                          * configure the exact value for the 005 token, if necessary.
 186                                          */
 187                                         sslports = portid;
 188                                         break;
 189                                 }
 190                         }
 191                 }
 192         }
 193
 194         void OnModuleRehash(User* user, const std::string &param) CXX11_OVERRIDE
 195         {
 196                 if (param != "ssl")
 197                         return;
 198
 199                 std::string keyfile;
 200                 std::string certfile;
 201                 std::string cafile;
 202                 std::string dhfile;
 203                 OnRehash(user);
 204
 205                 ConfigTag* conf = ServerInstance->Config->ConfValue("openssl");
 206
 207                 cafile   = conf->getString("cafile", CONFIG_PATH "/ca.pem");
 208                 certfile = conf->getString("certfile", CONFIG_PATH "/cert.pem");
 209                 keyfile  = conf->getString("keyfile", CONFIG_PATH "/key.pem");
 210                 dhfile   = conf->getString("dhfile", CONFIG_PATH "/dhparams.pem");
 211                 std::string hash = conf->getString("hash", "md5");
 212                 if (hash != "sha1" && hash != "md5")
 213                         throw ModuleException("Unknown hash type " + hash);
 214                 use_sha = (hash == "sha1");
 215
 216                 std::string ciphers = conf->getString("ciphers", "");
 217
 218                 if (!ciphers.empty())
 219                 {
 220                         if ((!SSL_CTX_set_cipher_list(ctx, ciphers.c_str())) || (!SSL_CTX_set_cipher_list(clictx, ciphers.c_str())))
 221                         {
 222                                 ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEFAULT, "m_ssl_openssl.so: Can't set cipher list to %s.", ciphers.c_str());
 223                                 ERR_print_errors_cb(error_callback, this);
 224                         }
 225                 }
 226
 227                 /* Load our keys and certificates
 228                  * NOTE: OpenSSL's error logging API sucks, don't blame us for this clusterfuck.
 229                  */
 230                 if ((!SSL_CTX_use_certificate_chain_file(ctx, certfile.c_str())) || (!SSL_CTX_use_certificate_chain_file(clictx, certfile.c_str())))
 231                 {
 232                         ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEFAULT, "m_ssl_openssl.so: Can't read certificate file %s. %s", certfile.c_str(), strerror(errno));
 233                         ERR_print_errors_cb(error_callback, this);
 234                 }
 235
 236                 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)))
 237                 {
 238                         ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEFAULT, "m_ssl_openssl.so: Can't read key file %s. %s", keyfile.c_str(), strerror(errno));
 239                         ERR_print_errors_cb(error_callback, this);
 240                 }
 241
 242                 /* Load the CAs we trust*/
 243                 if (((!SSL_CTX_load_verify_locations(ctx, cafile.c_str(), 0))) || (!SSL_CTX_load_verify_locations(clictx, cafile.c_str(), 0)))
 244                 {
 245                         ServerInstance->Logs->Log("m_ssl_openssl",LOG_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));
 246                         ERR_print_errors_cb(error_callback, this);
 247                 }
 248
 249                 FILE* dhpfile = fopen(dhfile.c_str(), "r");
 250                 DH* ret;
 251
 252                 if (dhpfile == NULL)
 253                 {
 254                         ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEFAULT, "m_ssl_openssl.so Couldn't open DH file %s: %s", dhfile.c_str(), strerror(errno));
 255                         throw ModuleException("Couldn't open DH file " + dhfile + ": " + strerror(errno));
 256                 }
 257                 else
 258                 {
 259                         ret = PEM_read_DHparams(dhpfile, NULL, NULL, NULL);
 260                         if ((SSL_CTX_set_tmp_dh(ctx, ret) < 0) || (SSL_CTX_set_tmp_dh(clictx, ret) < 0))
 261                         {
 262                                 ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEFAULT, "m_ssl_openssl.so: Couldn't set DH parameters %s. SSL errors follow:", dhfile.c_str());
 263                                 ERR_print_errors_cb(error_callback, this);
 264                         }
 265                 }
 266
 267                 fclose(dhpfile);
 268         }
 269
 270         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
 271         {
 272                 if (!sslports.empty())
 273                         tokens["SSL"] = sslports;
 274         }
 275
 276         ~ModuleSSLOpenSSL()
 277         {
 278                 SSL_CTX_free(ctx);
 279                 SSL_CTX_free(clictx);
 280                 delete[] sessions;
 281         }
 282
 283         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 284         {
 285                 if (user->eh.GetIOHook() == this)
 286                 {
 287                         if (sessions[user->eh.GetFd()].sess)
 288                         {
 289                                 if (!sessions[user->eh.GetFd()].cert->fingerprint.empty())
 290                                         user->WriteNotice("*** You are connected using SSL cipher '" + std::string(SSL_get_cipher(sessions[user->eh.GetFd()].sess)) +
 291                                                 "' and your SSL fingerprint is " + sessions[user->eh.GetFd()].cert->fingerprint);
 292                                 else
 293                                         user->WriteNotice("*** You are connected using SSL cipher '" + std::string(SSL_get_cipher(sessions[user->eh.GetFd()].sess)) + "'");
 294                         }
 295                 }
 296         }
 297
 298         void OnCleanup(int target_type, void* item) CXX11_OVERRIDE
 299         {
 300                 if (target_type == TYPE_USER)
 301                 {
 302                         LocalUser* user = IS_LOCAL((User*)item);
 303
 304                         if (user && user->eh.GetIOHook() == this)
 305                         {
 306                                 // User is using SSL, they're a local user, and they're using one of *our* SSL ports.
 307                                 // Potentially there could be multiple SSL modules loaded at once on different ports.
 308                                 ServerInstance->Users->QuitUser(user, "SSL module unloading");
 309                         }
 310                 }
 311         }
 312
 313         Version GetVersion() CXX11_OVERRIDE
 314         {
 315                 return Version("Provides SSL support for clients", VF_VENDOR);
 316         }
 317
 318         void OnRequest(Request& request) CXX11_OVERRIDE
 319         {
 320                 if (strcmp("GET_SSL_CERT", request.id) == 0)
 321                 {
 322                         SocketCertificateRequest& req = static_cast<SocketCertificateRequest&>(request);
 323                         int fd = req.sock->GetFd();
 324                         issl_session* session = &sessions[fd];
 325
 326                         req.cert = session->cert;
 327                 }
 328         }
 329
 330         void OnStreamSocketAccept(StreamSocket* user, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server) CXX11_OVERRIDE
 331         {
 332                 int fd = user->GetFd();
 333
 334                 issl_session* session = &sessions[fd];
 335
 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",LOG_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) CXX11_OVERRIDE
 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->sess = SSL_new(clictx);
 363                 session->status = ISSL_NONE;
 364                 session->outbound = true;
 365
 366                 if (session->sess == NULL)
 367                         return;
 368
 369                 if (SSL_set_fd(session->sess, fd) == 0)
 370                 {
 371                         ServerInstance->Logs->Log("m_ssl_openssl",LOG_DEBUG,"BUG: Can't set fd with SSL_set_fd: %d", fd);
 372                         return;
 373                 }
 374
 375                 Handshake(user, session);
 376         }
 377
 378         void OnStreamSocketClose(StreamSocket* user) CXX11_OVERRIDE
 379         {
 380                 int fd = user->GetFd();
 381                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 382                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 383                         return;
 384
 385                 CloseSession(&sessions[fd]);
 386         }
 387
 388         int OnStreamSocketRead(StreamSocket* user, std::string& recvq) CXX11_OVERRIDE
 389         {
 390                 int fd = user->GetFd();
 391                 /* Are there any possibilities of an out of range fd? Hope not, but lets be paranoid */
 392                 if ((fd < 0) || (fd > ServerInstance->SE->GetMaxFds() - 1))
 393                         return -1;
 394
 395                 issl_session* session = &sessions[fd];
 396
 397                 if (!session->sess)
 398                 {
 399                         CloseSession(session);
 400                         return -1;
 401                 }
 402
 403                 if (session->status == ISSL_HANDSHAKING)
 404                 {
 405                         // The handshake isn't finished and it wants to read, try to finish it.
 406                         if (!Handshake(user, session))
 407                         {
 408                                 // Couldn't resume handshake.
 409                                 if (session->status == ISSL_NONE)
 410                                         return -1;
 411                                 return 0;
 412                         }
 413                 }
 414
 415                 // If we resumed the handshake then session->status will be ISSL_OPEN
 416
 417                 if (session->status == ISSL_OPEN)
 418                 {
 419                         char* buffer = ServerInstance->GetReadBuffer();
 420                         size_t bufsiz = ServerInstance->Config->NetBufferSize;
 421                         int ret = SSL_read(session->sess, buffer, bufsiz);
 422
 423                         if (ret > 0)
 424                         {
 425                                 recvq.append(buffer, ret);
 426                                 if (session->data_to_write)
 427                                         ServerInstance->SE->ChangeEventMask(user, FD_WANT_POLL_READ | FD_WANT_SINGLE_WRITE);
 428                                 return 1;
 429                         }
 430                         else if (ret == 0)
 431                         {
 432                                 // Client closed connection.
 433                                 CloseSession(session);
 434                                 user->SetError("Connection closed");
 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) CXX11_OVERRIDE
 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 = BinToHex(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",LOG_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)