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