dlls/winhttp/net.c

   1 /*
   2  * Copyright 2008 Hans Leidekker for CodeWeavers
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 #include "config.h"
  20 #include "wine/port.h"
  21
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include <errno.h>
  25
  26 #include <sys/types.h>
  27 #ifdef HAVE_SYS_SOCKET_H
  28 # include <sys/socket.h>
  29 #endif
  30 #ifdef HAVE_SYS_IOCTL_H
  31 # include <sys/ioctl.h>
  32 #endif
  33 #ifdef HAVE_SYS_FILIO_H
  34 # include <sys/filio.h>
  35 #endif
  36 #ifdef HAVE_POLL_H
  37 # include <poll.h>
  38 #endif
  39 #ifdef HAVE_OPENSSL_SSL_H
  40 # include <openssl/ssl.h>
  41 #undef FAR
  42 #undef DSA
  43 #endif
  44
  45 #include "wine/debug.h"
  46 #include "wine/library.h"
  47
  48 #include "windef.h"
  49 #include "winbase.h"
  50 #include "winhttp.h"
  51 #include "wincrypt.h"
  52
  53 #include "winhttp_private.h"
  54
  55 /* to avoid conflicts with the Unix socket headers */
  56 #define USE_WS_PREFIX
  57 #include "winsock2.h"
  58
  59 WINE_DEFAULT_DEBUG_CHANNEL(winhttp);
  60
  61 #define DEFAULT_SEND_TIMEOUT        30
  62 #define DEFAULT_RECEIVE_TIMEOUT     30
  63
  64 #ifndef HAVE_GETADDRINFO
  65
  66 /* critical section to protect non-reentrant gethostbyname() */
  67 static CRITICAL_SECTION cs_gethostbyname;
  68 static CRITICAL_SECTION_DEBUG critsect_debug =
  69 {
  70     0, 0, &cs_gethostbyname,
  71     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  72       0, 0, { (DWORD_PTR)(__FILE__ ": cs_gethostbyname") }
  73 };
  74 static CRITICAL_SECTION cs_gethostbyname = { &critsect_debug, -1, 0, 0, 0, 0 };
  75
  76 #endif
  77
  78 #ifdef SONAME_LIBSSL
  79
  80 #include <openssl/err.h>
  81
  82 static void *libssl_handle;
  83 static void *libcrypto_handle;
  84
  85 static SSL_METHOD *method;
  86 static SSL_CTX *ctx;
  87
  88 #define MAKE_FUNCPTR(f) static typeof(f) * p##f
  89
  90 MAKE_FUNCPTR( SSL_library_init );
  91 MAKE_FUNCPTR( SSL_load_error_strings );
  92 MAKE_FUNCPTR( SSLv23_method );
  93 MAKE_FUNCPTR( SSL_CTX_new );
  94 MAKE_FUNCPTR( SSL_new );
  95 MAKE_FUNCPTR( SSL_free );
  96 MAKE_FUNCPTR( SSL_set_fd );
  97 MAKE_FUNCPTR( SSL_connect );
  98 MAKE_FUNCPTR( SSL_shutdown );
  99 MAKE_FUNCPTR( SSL_write );
 100 MAKE_FUNCPTR( SSL_read );
 101 MAKE_FUNCPTR( SSL_get_verify_result );
 102 MAKE_FUNCPTR( SSL_get_peer_certificate );
 103 MAKE_FUNCPTR( SSL_CTX_get_timeout );
 104 MAKE_FUNCPTR( SSL_CTX_set_timeout );
 105 MAKE_FUNCPTR( SSL_CTX_set_default_verify_paths );
 106
 107 MAKE_FUNCPTR( BIO_new_fp );
 108 MAKE_FUNCPTR( ERR_get_error );
 109 MAKE_FUNCPTR( ERR_error_string );
 110 MAKE_FUNCPTR( i2d_X509 );
 111 #undef MAKE_FUNCPTR
 112
 113 #endif
 114
 115 /* translate a unix error code into a winsock error code */
 116 static int sock_get_error( int err )
 117 {
 118 #if !defined(__MINGW32__) && !defined (_MSC_VER)
 119     switch (err)
 120     {
 121         case EINTR:             return WSAEINTR;
 122         case EBADF:             return WSAEBADF;
 123         case EPERM:
 124         case EACCES:            return WSAEACCES;
 125         case EFAULT:            return WSAEFAULT;
 126         case EINVAL:            return WSAEINVAL;
 127         case EMFILE:            return WSAEMFILE;
 128         case EWOULDBLOCK:       return WSAEWOULDBLOCK;
 129         case EINPROGRESS:       return WSAEINPROGRESS;
 130         case EALREADY:          return WSAEALREADY;
 131         case ENOTSOCK:          return WSAENOTSOCK;
 132         case EDESTADDRREQ:      return WSAEDESTADDRREQ;
 133         case EMSGSIZE:          return WSAEMSGSIZE;
 134         case EPROTOTYPE:        return WSAEPROTOTYPE;
 135         case ENOPROTOOPT:       return WSAENOPROTOOPT;
 136         case EPROTONOSUPPORT:   return WSAEPROTONOSUPPORT;
 137         case ESOCKTNOSUPPORT:   return WSAESOCKTNOSUPPORT;
 138         case EOPNOTSUPP:        return WSAEOPNOTSUPP;
 139         case EPFNOSUPPORT:      return WSAEPFNOSUPPORT;
 140         case EAFNOSUPPORT:      return WSAEAFNOSUPPORT;
 141         case EADDRINUSE:        return WSAEADDRINUSE;
 142         case EADDRNOTAVAIL:     return WSAEADDRNOTAVAIL;
 143         case ENETDOWN:          return WSAENETDOWN;
 144         case ENETUNREACH:       return WSAENETUNREACH;
 145         case ENETRESET:         return WSAENETRESET;
 146         case ECONNABORTED:      return WSAECONNABORTED;
 147         case EPIPE:
 148         case ECONNRESET:        return WSAECONNRESET;
 149         case ENOBUFS:           return WSAENOBUFS;
 150         case EISCONN:           return WSAEISCONN;
 151         case ENOTCONN:          return WSAENOTCONN;
 152         case ESHUTDOWN:         return WSAESHUTDOWN;
 153         case ETOOMANYREFS:      return WSAETOOMANYREFS;
 154         case ETIMEDOUT:         return WSAETIMEDOUT;
 155         case ECONNREFUSED:      return WSAECONNREFUSED;
 156         case ELOOP:             return WSAELOOP;
 157         case ENAMETOOLONG:      return WSAENAMETOOLONG;
 158         case EHOSTDOWN:         return WSAEHOSTDOWN;
 159         case EHOSTUNREACH:      return WSAEHOSTUNREACH;
 160         case ENOTEMPTY:         return WSAENOTEMPTY;
 161 #ifdef EPROCLIM
 162         case EPROCLIM:          return WSAEPROCLIM;
 163 #endif
 164 #ifdef EUSERS
 165         case EUSERS:            return WSAEUSERS;
 166 #endif
 167 #ifdef EDQUOT
 168         case EDQUOT:            return WSAEDQUOT;
 169 #endif
 170 #ifdef ESTALE
 171         case ESTALE:            return WSAESTALE;
 172 #endif
 173 #ifdef EREMOTE
 174         case EREMOTE:           return WSAEREMOTE;
 175 #endif
 176     default: errno = err; perror( "sock_set_error" ); return WSAEFAULT;
 177     }
 178 #endif
 179     return err;
 180 }
 181
 182 BOOL netconn_init( netconn_t *conn, BOOL secure )
 183 {
 184     conn->socket = -1;
 185     if (!secure) return TRUE;
 186
 187 #if defined(SONAME_LIBSSL) && defined(SONAME_LIBCRYPTO)
 188     if (libssl_handle) return TRUE;
 189     if (!(libssl_handle = wine_dlopen( SONAME_LIBSSL, RTLD_NOW, NULL, 0 )))
 190     {
 191         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBSSL);
 192         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 193         return FALSE;
 194     }
 195     if (!(libcrypto_handle = wine_dlopen( SONAME_LIBCRYPTO, RTLD_NOW, NULL, 0 )))
 196     {
 197         ERR("Trying to use SSL but couldn't load %s. Expect trouble.\n", SONAME_LIBCRYPTO);
 198         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 199         return FALSE;
 200     }
 201 #define LOAD_FUNCPTR(x) \
 202     if (!(p##x = wine_dlsym( libssl_handle, #x, NULL, 0 ))) \
 203     { \
 204         ERR("Failed to load symbol %s\n", #x); \
 205         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 206         return FALSE; \
 207     }
 208     LOAD_FUNCPTR( SSL_library_init );
 209     LOAD_FUNCPTR( SSL_load_error_strings );
 210     LOAD_FUNCPTR( SSLv23_method );
 211     LOAD_FUNCPTR( SSL_CTX_new );
 212     LOAD_FUNCPTR( SSL_new );
 213     LOAD_FUNCPTR( SSL_free );
 214     LOAD_FUNCPTR( SSL_set_fd );
 215     LOAD_FUNCPTR( SSL_connect );
 216     LOAD_FUNCPTR( SSL_shutdown );
 217     LOAD_FUNCPTR( SSL_write );
 218     LOAD_FUNCPTR( SSL_read );
 219     LOAD_FUNCPTR( SSL_get_verify_result );
 220     LOAD_FUNCPTR( SSL_get_peer_certificate );
 221     LOAD_FUNCPTR( SSL_CTX_get_timeout );
 222     LOAD_FUNCPTR( SSL_CTX_set_timeout );
 223     LOAD_FUNCPTR( SSL_CTX_set_default_verify_paths );
 224 #undef LOAD_FUNCPTR
 225
 226 #define LOAD_FUNCPTR(x) \
 227     if (!(p##x = wine_dlsym( libcrypto_handle, #x, NULL, 0 ))) \
 228     { \
 229         ERR("Failed to load symbol %s\n", #x); \
 230         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR ); \
 231         return FALSE; \
 232     }
 233     LOAD_FUNCPTR( BIO_new_fp );
 234     LOAD_FUNCPTR( ERR_get_error );
 235     LOAD_FUNCPTR( ERR_error_string );
 236     LOAD_FUNCPTR( i2d_X509 );
 237 #undef LOAD_FUNCPTR
 238
 239     pSSL_library_init();
 240     pSSL_load_error_strings();
 241     pBIO_new_fp( stderr, BIO_NOCLOSE );
 242
 243     method = pSSLv23_method();
 244 #else
 245     WARN("SSL support not compiled in.\n");
 246     set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 247     return FALSE;
 248 #endif
 249     return TRUE;
 250 }
 251
 252 BOOL netconn_connected( netconn_t *conn )
 253 {
 254     return (conn->socket != -1);
 255 }
 256
 257 BOOL netconn_create( netconn_t *conn, int domain, int type, int protocol )
 258 {
 259     if ((conn->socket = socket( domain, type, protocol )) == -1)
 260     {
 261         WARN("unable to create socket (%s)\n", strerror(errno));
 262         set_last_error( sock_get_error( errno ) );
 263         return FALSE;
 264     }
 265     return TRUE;
 266 }
 267
 268 BOOL netconn_close( netconn_t *conn )
 269 {
 270     int res;
 271
 272 #ifdef SONAME_LIBSSL
 273     if (conn->secure)
 274     {
 275         heap_free( conn->peek_msg_mem );
 276         conn->peek_msg_mem = NULL;
 277         conn->peek_msg = NULL;
 278         conn->peek_len = 0;
 279
 280         pSSL_shutdown( conn->ssl_conn );
 281         pSSL_free( conn->ssl_conn );
 282
 283         conn->ssl_conn = NULL;
 284         conn->secure = FALSE;
 285     }
 286 #endif
 287     res = closesocket( conn->socket );
 288     conn->socket = -1;
 289     if (res == -1)
 290     {
 291         set_last_error( sock_get_error( errno ) );
 292         return FALSE;
 293     }
 294     return TRUE;
 295 }
 296
 297 BOOL netconn_connect( netconn_t *conn, const struct sockaddr *sockaddr, unsigned int addr_len )
 298 {
 299     if (connect( conn->socket, sockaddr, addr_len ) == -1)
 300     {
 301         WARN("unable to connect to host (%s)\n", strerror(errno));
 302         set_last_error( sock_get_error( errno ) );
 303         return FALSE;
 304     }
 305     return TRUE;
 306 }
 307
 308 BOOL netconn_secure_connect( netconn_t *conn )
 309 {
 310 #ifdef SONAME_LIBSSL
 311     X509 *cert;
 312     long res;
 313
 314     ctx = pSSL_CTX_new( method );
 315     if (!pSSL_CTX_set_default_verify_paths( ctx ))
 316     {
 317         ERR("SSL_CTX_set_default_verify_paths failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 318         set_last_error( ERROR_OUTOFMEMORY );
 319         return FALSE;
 320     }
 321     if (!(conn->ssl_conn = pSSL_new( ctx )))
 322     {
 323         ERR("SSL_new failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 324         set_last_error( ERROR_OUTOFMEMORY );
 325         goto fail;
 326     }
 327     if (!pSSL_set_fd( conn->ssl_conn, conn->socket ))
 328     {
 329         ERR("SSL_set_fd failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 330         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 331         goto fail;
 332     }
 333     if (pSSL_connect( conn->ssl_conn ) <= 0)
 334     {
 335         ERR("SSL_connect failed: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 336         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 337         goto fail;
 338     }
 339     if (!(cert = pSSL_get_peer_certificate( conn->ssl_conn )))
 340     {
 341         ERR("No certificate for server: %s\n", pERR_error_string( pERR_get_error(), 0 ));
 342         set_last_error( ERROR_WINHTTP_SECURE_CHANNEL_ERROR );
 343         goto fail;
 344     }
 345     if ((res = pSSL_get_verify_result( conn->ssl_conn )) != X509_V_OK)
 346     {
 347         /* FIXME: we should set an error and return, but we only print an error at the moment */
 348         ERR("couldn't verify server certificate (%ld)\n", res);
 349     }
 350     TRACE("established SSL connection\n");
 351     conn->secure = TRUE;
 352     return TRUE;
 353
 354 fail:
 355     if (conn->ssl_conn)
 356     {
 357         pSSL_shutdown( conn->ssl_conn );
 358         pSSL_free( conn->ssl_conn );
 359         conn->ssl_conn = NULL;
 360     }
 361 #endif
 362     return FALSE;
 363 }
 364
 365 BOOL netconn_send( netconn_t *conn, const void *msg, size_t len, int flags, int *sent )
 366 {
 367     if (!netconn_connected( conn )) return FALSE;
 368     if (conn->secure)
 369     {
 370 #ifdef SONAME_LIBSSL
 371         if (flags) FIXME("SSL_write doesn't support any flags (%08x)\n", flags);
 372         *sent = pSSL_write( conn->ssl_conn, msg, len );
 373         if (*sent < 1 && len) return FALSE;
 374         return TRUE;
 375 #else
 376         return FALSE;
 377 #endif
 378     }
 379     if ((*sent = send( conn->socket, msg, len, flags )) == -1)
 380     {
 381         set_last_error( sock_get_error( errno ) );
 382         return FALSE;
 383     }
 384     return TRUE;
 385 }
 386
 387 BOOL netconn_recv( netconn_t *conn, void *buf, size_t len, int flags, int *recvd )
 388 {
 389     *recvd = 0;
 390     if (!netconn_connected( conn )) return FALSE;
 391     if (!len) return TRUE;
 392
 393     if (conn->secure)
 394     {
 395 #ifdef SONAME_LIBSSL
 396         if (flags & ~(MSG_PEEK | MSG_WAITALL))
 397             FIXME("SSL_read does not support the following flags: %08x\n", flags);
 398
 399         /* this ugly hack is all for MSG_PEEK */
 400         if (flags & MSG_PEEK && !conn->peek_msg)
 401         {
 402             if (!(conn->peek_msg = conn->peek_msg_mem = heap_alloc( len + 1 ))) return FALSE;
 403         }
 404         else if (flags & MSG_PEEK && conn->peek_msg)
 405         {
 406             if (len < conn->peek_len) FIXME("buffer isn't big enough, should we wrap?\n");
 407             *recvd = min( len, conn->peek_len );
 408             memcpy( buf, conn->peek_msg, *recvd );
 409             return TRUE;
 410         }
 411         else if (conn->peek_msg)
 412         {
 413             *recvd = min( len, conn->peek_len );
 414             memcpy( buf, conn->peek_msg, *recvd );
 415             conn->peek_len -= *recvd;
 416             conn->peek_msg += *recvd;
 417
 418             if (conn->peek_len == 0)
 419             {
 420                 heap_free( conn->peek_msg_mem );
 421                 conn->peek_msg_mem = NULL;
 422                 conn->peek_msg = NULL;
 423             }
 424             /* check if we have enough data from the peek buffer */
 425             if (!(flags & MSG_WAITALL) || (*recvd == len)) return TRUE;
 426         }
 427         *recvd += pSSL_read( conn->ssl_conn, (char *)buf + *recvd, len - *recvd );
 428         if (flags & MSG_PEEK) /* must copy into buffer */
 429         {
 430             conn->peek_len = *recvd;
 431             if (!*recvd)
 432             {
 433                 heap_free( conn->peek_msg_mem );
 434                 conn->peek_msg_mem = NULL;
 435                 conn->peek_msg = NULL;
 436             }
 437             else memcpy( conn->peek_msg, buf, *recvd );
 438         }
 439         if (*recvd < 1 && len) return FALSE;
 440         return TRUE;
 441 #else
 442         return FALSE;
 443 #endif
 444     }
 445     if ((*recvd = recv( conn->socket, buf, len, flags )) == -1)
 446     {
 447         set_last_error( sock_get_error( errno ) );
 448         return FALSE;
 449     }
 450     return TRUE;
 451 }
 452
 453 BOOL netconn_query_data_available( netconn_t *conn, DWORD *available )
 454 {
 455 #ifdef FIONREAD
 456     int ret, unread;
 457 #endif
 458     *available = 0;
 459     if (!netconn_connected( conn )) return FALSE;
 460
 461     if (conn->secure)
 462     {
 463 #ifdef SONAME_LIBSSL
 464         if (conn->peek_msg) *available = conn->peek_len;
 465 #endif
 466         return TRUE;
 467     }
 468 #ifdef FIONREAD
 469     if (!(ret = ioctlsocket( conn->socket, FIONREAD, &unread ))) *available = unread;
 470 #endif
 471     return TRUE;
 472 }
 473
 474 BOOL netconn_get_next_line( netconn_t *conn, char *buffer, DWORD *buflen )
 475 {
 476     struct pollfd pfd;
 477     BOOL ret = FALSE;
 478     DWORD recvd = 0;
 479
 480     if (!netconn_connected( conn )) return FALSE;
 481
 482     if (conn->secure)
 483     {
 484 #ifdef SONAME_LIBSSL
 485         long timeout;
 486
 487         timeout = pSSL_CTX_get_timeout( ctx );
 488         pSSL_CTX_set_timeout( ctx, DEFAULT_RECEIVE_TIMEOUT );
 489
 490         while (recvd < *buflen)
 491         {
 492             int dummy;
 493             if (!netconn_recv( conn, &buffer[recvd], 1, 0, &dummy ))
 494             {
 495                 set_last_error( ERROR_CONNECTION_ABORTED );
 496                 break;
 497             }
 498             if (buffer[recvd] == '\n')
 499             {
 500                 ret = TRUE;
 501                 break;
 502             }
 503             if (buffer[recvd] != '\r') recvd++;
 504         }
 505         pSSL_CTX_set_timeout( ctx, timeout );
 506         if (ret)
 507         {
 508             buffer[recvd++] = 0;
 509             *buflen = recvd;
 510             TRACE("received line %s\n", debugstr_a(buffer));
 511         }
 512         return ret;
 513 #else
 514         return FALSE;
 515 #endif
 516     }
 517
 518     pfd.fd = conn->socket;
 519     pfd.events = POLLIN;
 520     while (recvd < *buflen)
 521     {
 522         if (poll( &pfd, 1, DEFAULT_RECEIVE_TIMEOUT * 1000 ) > 0)
 523         {
 524             int res;
 525             if ((res = recv( conn->socket, &buffer[recvd], 1, 0 )) <= 0)
 526             {
 527                 if (res == -1) set_last_error( sock_get_error( errno ) );
 528                 break;
 529             }
 530             if (buffer[recvd] == '\n')
 531             {
 532                 ret = TRUE;
 533                 break;
 534             }
 535             if (buffer[recvd] != '\r') recvd++;
 536         }
 537         else
 538         {
 539             set_last_error( ERROR_WINHTTP_TIMEOUT );
 540             break;
 541         }
 542     }
 543     if (ret)
 544     {
 545         buffer[recvd++] = 0;
 546         *buflen = recvd;
 547         TRACE("received line %s\n", debugstr_a(buffer));
 548     }
 549     return ret;
 550 }
 551
 552 DWORD netconn_set_timeout( netconn_t *netconn, BOOL send, int value )
 553 {
 554     int res;
 555     struct timeval tv;
 556
 557     /* value is in milliseconds, convert to struct timeval */
 558     tv.tv_sec = value / 1000;
 559     tv.tv_usec = (value % 1000) * 1000;
 560
 561     if ((res = setsockopt( netconn->socket, SOL_SOCKET, send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&tv, sizeof(tv) ) == -1))
 562     {
 563         WARN("setsockopt failed (%s)\n", strerror( errno ));
 564         return sock_get_error( errno );
 565     }
 566     return ERROR_SUCCESS;
 567 }
 568
 569 BOOL netconn_resolve( WCHAR *hostnameW, INTERNET_PORT port, struct sockaddr_in *sa )
 570 {
 571     char *hostname;
 572 #ifdef HAVE_GETADDRINFO
 573     struct addrinfo *res, hints;
 574     int ret;
 575 #else
 576     struct hostent *he;
 577 #endif
 578
 579     if (!(hostname = strdupWA( hostnameW ))) return FALSE;
 580
 581 #ifdef HAVE_GETADDRINFO
 582     memset( &hints, 0, sizeof(struct addrinfo) );
 583     hints.ai_family = AF_INET;
 584
 585     ret = getaddrinfo( hostname, NULL, &hints, &res );
 586     heap_free( hostname );
 587     if (ret != 0)
 588     {
 589         TRACE("failed to get address of %s (%s)\n", debugstr_w(hostnameW), gai_strerror(ret));
 590         return FALSE;
 591     }
 592     memset( sa, 0, sizeof(struct sockaddr_in) );
 593     memcpy( &sa->sin_addr, &((struct sockaddr_in *)res->ai_addr)->sin_addr, sizeof(struct in_addr) );
 594     sa->sin_family = res->ai_family;
 595     sa->sin_port = htons( port );
 596
 597     freeaddrinfo( res );
 598 #else
 599     EnterCriticalSection( &cs_gethostbyname );
 600
 601     he = gethostbyname( hostname );
 602     heap_free( hostname );
 603     if (!he)
 604     {
 605         TRACE("failed to get address of %s (%d)\n", debugstr_w(hostnameW), h_errno);
 606         LeaveCriticalSection( &cs_gethostbyname );
 607         return FALSE;
 608     }
 609     memset( sa, 0, sizeof(struct sockaddr_in) );
 610     memcpy( &sa->sin_addr, he->h_addr, he->h_length );
 611     sa->sin_family = he->h_addrtype;
 612     sa->sin_port = htons( port );
 613
 614     LeaveCriticalSection( &cs_gethostbyname );
 615 #endif
 616     return TRUE;
 617 }
 618
 619 const void *netconn_get_certificate( netconn_t *conn )
 620 {
 621 #ifdef SONAME_LIBSSL
 622     X509 *cert;
 623     unsigned char *buffer, *p;
 624     int len;
 625     BOOL malloc = FALSE;
 626     const CERT_CONTEXT *ret;
 627
 628     if (!conn->secure) return NULL;
 629
 630     if (!(cert = pSSL_get_peer_certificate( conn->ssl_conn ))) return NULL;
 631     p = NULL;
 632     if ((len = pi2d_X509( cert, &p )) < 0) return NULL;
 633     /*
 634      * SSL 0.9.7 and above malloc the buffer if it is null.
 635      * however earlier version do not and so we would need to alloc the buffer.
 636      *
 637      * see the i2d_X509 man page for more details.
 638      */
 639     if (!p)
 640     {
 641         if (!(buffer = heap_alloc( len ))) return NULL;
 642         p = buffer;
 643         len = pi2d_X509( cert, &p );
 644     }
 645     else
 646     {
 647         buffer = p;
 648         malloc = TRUE;
 649     }
 650
 651     ret = CertCreateCertificateContext( X509_ASN_ENCODING, buffer, len );
 652
 653     if (malloc) free( buffer );
 654     else heap_free( buffer );
 655
 656     return ret;
 657 #else
 658     return NULL;
 659 #endif
 660 }