dlls/winhttp/net.c

   1 /*
   2  * Copyright 2008 Hans Leidekker for CodeWeavers
   3  * Copyright 2013 Jacek Caban for CodeWeavers
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include <assert.h>
  21 #include <stdarg.h>
  22
  23 #define NONAMELESSUNION
  24 #include "windef.h"
  25 #include "winbase.h"
  26 #include "ws2tcpip.h"
  27 #include "winhttp.h"
  28 #include "schannel.h"
  29
  30 #include "wine/debug.h"
  31 #include "winhttp_private.h"
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(winhttp);
  34
  35 static int sock_send(int fd, const void *msg, size_t len, WSAOVERLAPPED *ovr)
  36 {
  37     WSABUF wsabuf;
  38     DWORD size;
  39     int err;
  40
  41     wsabuf.len = len;
  42     wsabuf.buf = (void *)msg;
  43
  44     if (!WSASend( (SOCKET)fd, &wsabuf, 1, &size, 0, ovr, NULL ))
  45     {
  46         assert( size == len );
  47         return size;
  48     }
  49     err = WSAGetLastError();
  50     if (!(ovr && err == WSA_IO_PENDING)) WARN( "send error %d\n", err );
  51     return -1;
  52 }
  53
  54 BOOL netconn_wait_overlapped_result( struct netconn *conn, WSAOVERLAPPED *ovr, DWORD *len )
  55 {
  56     OVERLAPPED *completion_ovr;
  57     ULONG_PTR key;
  58
  59     if (!GetQueuedCompletionStatus( conn->port, len, &key, &completion_ovr, INFINITE ))
  60     {
  61         WARN( "GetQueuedCompletionStatus failed, err %lu.\n", GetLastError() );
  62         return FALSE;
  63     }
  64     if ((key != conn->socket && conn->socket != -1) || completion_ovr != (OVERLAPPED *)ovr)
  65     {
  66         ERR( "Unexpected completion key %Ix, overlapped %p.\n", key, completion_ovr );
  67         return FALSE;
  68     }
  69     return TRUE;
  70 }
  71
  72 static int sock_recv(int fd, void *msg, size_t len, int flags)
  73 {
  74     int ret;
  75     do
  76     {
  77         if ((ret = recv(fd, msg, len, flags)) == -1) WARN( "recv error %d\n", WSAGetLastError() );
  78     }
  79     while(ret == -1 && WSAGetLastError() == WSAEINTR);
  80     return ret;
  81 }
  82
  83 static DWORD netconn_verify_cert( PCCERT_CONTEXT cert, WCHAR *server, DWORD security_flags, BOOL check_revocation )
  84 {
  85     HCERTSTORE store = cert->hCertStore;
  86     BOOL ret;
  87     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
  88     PCCERT_CHAIN_CONTEXT chain;
  89     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
  90     char *server_auth[] = { oid_server_auth };
  91     DWORD err = ERROR_SUCCESS;
  92
  93     TRACE("verifying %s\n", debugstr_w( server ));
  94     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
  95     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
  96     ret = CertGetCertificateChain( NULL, cert, NULL, store, &chainPara,
  97                                    check_revocation ? CERT_CHAIN_REVOCATION_CHECK_CHAIN_EXCLUDE_ROOT : 0,
  98                                    NULL, &chain );
  99     if (ret)
 100     {
 101         if (chain->TrustStatus.dwErrorStatus)
 102         {
 103             static const DWORD supportedErrors =
 104                 CERT_TRUST_IS_NOT_TIME_VALID |
 105                 CERT_TRUST_IS_UNTRUSTED_ROOT |
 106                 CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
 107
 108             if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_NOT_TIME_VALID)
 109             {
 110                 if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID))
 111                     err = ERROR_WINHTTP_SECURE_CERT_DATE_INVALID;
 112             }
 113             else if ((chain->TrustStatus.dwErrorStatus &
 114                       CERT_TRUST_IS_UNTRUSTED_ROOT) ||
 115                      (chain->TrustStatus.dwErrorStatus &
 116                       CERT_TRUST_IS_PARTIAL_CHAIN))
 117             {
 118                 if (!(security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA))
 119                     err = ERROR_WINHTTP_SECURE_INVALID_CA;
 120             }
 121             else if ((chain->TrustStatus.dwErrorStatus &
 122                       CERT_TRUST_IS_OFFLINE_REVOCATION) ||
 123                      (chain->TrustStatus.dwErrorStatus &
 124                       CERT_TRUST_REVOCATION_STATUS_UNKNOWN))
 125                 err = ERROR_WINHTTP_SECURE_CERT_REV_FAILED;
 126             else if (chain->TrustStatus.dwErrorStatus & CERT_TRUST_IS_REVOKED)
 127                 err = ERROR_WINHTTP_SECURE_CERT_REVOKED;
 128             else if (chain->TrustStatus.dwErrorStatus &
 129                 CERT_TRUST_IS_NOT_VALID_FOR_USAGE)
 130             {
 131                 if (!(security_flags & SECURITY_FLAG_IGNORE_CERT_WRONG_USAGE))
 132                     err = ERROR_WINHTTP_SECURE_CERT_WRONG_USAGE;
 133             }
 134             else if (chain->TrustStatus.dwErrorStatus & ~supportedErrors)
 135                 err = ERROR_WINHTTP_SECURE_INVALID_CERT;
 136         }
 137         if (!err)
 138         {
 139             CERT_CHAIN_POLICY_PARA policyPara;
 140             SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
 141             CERT_CHAIN_POLICY_STATUS policyStatus;
 142             CERT_CHAIN_CONTEXT chainCopy;
 143
 144             /* Clear chain->TrustStatus.dwErrorStatus so
 145              * CertVerifyCertificateChainPolicy will verify additional checks
 146              * rather than stopping with an existing, ignored error.
 147              */
 148             memcpy(&chainCopy, chain, sizeof(chainCopy));
 149             chainCopy.TrustStatus.dwErrorStatus = 0;
 150             sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
 151             sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
 152             sslExtraPolicyPara.pwszServerName = server;
 153             sslExtraPolicyPara.fdwChecks = security_flags;
 154             policyPara.cbSize = sizeof(policyPara);
 155             policyPara.dwFlags = 0;
 156             policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
 157             ret = CertVerifyCertificateChainPolicy( CERT_CHAIN_POLICY_SSL,
 158                                                     &chainCopy, &policyPara,
 159                                                     &policyStatus );
 160             /* Any error in the policy status indicates that the
 161              * policy couldn't be verified.
 162              */
 163             if (ret && policyStatus.dwError)
 164             {
 165                 if (policyStatus.dwError == CERT_E_CN_NO_MATCH)
 166                     err = ERROR_WINHTTP_SECURE_CERT_CN_INVALID;
 167                 else
 168                     err = ERROR_WINHTTP_SECURE_INVALID_CERT;
 169             }
 170         }
 171         CertFreeCertificateChain( chain );
 172     }
 173     else
 174         err = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 175     TRACE( "returning %#lx\n", err );
 176     return err;
 177 }
 178
 179 static BOOL winsock_loaded;
 180
 181 void netconn_unload( void )
 182 {
 183     if (winsock_loaded) WSACleanup();
 184 }
 185
 186 static BOOL WINAPI winsock_startup( INIT_ONCE *once, void *param, void **ctx )
 187 {
 188     int ret;
 189     WSADATA data;
 190     if (!(ret = WSAStartup( MAKEWORD(1,1), &data ))) winsock_loaded = TRUE;
 191     else ERR( "WSAStartup failed: %d\n", ret );
 192     return TRUE;
 193 }
 194
 195 static void winsock_init(void)
 196 {
 197     static INIT_ONCE once = INIT_ONCE_STATIC_INIT;
 198     InitOnceExecuteOnce( &once, winsock_startup, NULL, NULL );
 199 }
 200
 201 static void set_blocking( struct netconn *conn, BOOL blocking )
 202 {
 203     ULONG state = !blocking;
 204     ioctlsocket( conn->socket, FIONBIO, &state );
 205 }
 206
 207 DWORD netconn_create( struct hostdata *host, const struct sockaddr_storage *sockaddr, int timeout,
 208                       struct netconn **ret_conn )
 209 {
 210     struct netconn *conn;
 211     unsigned int addr_len;
 212     DWORD ret;
 213
 214     winsock_init();
 215
 216     if (!(conn = calloc( 1, sizeof(*conn) ))) return ERROR_OUTOFMEMORY;
 217     conn->host = host;
 218     conn->sockaddr = *sockaddr;
 219     if ((conn->socket = WSASocketW( sockaddr->ss_family, SOCK_STREAM, 0, NULL, 0, WSA_FLAG_OVERLAPPED )) == -1)
 220     {
 221         ret = WSAGetLastError();
 222         WARN( "unable to create socket (%lu)\n", ret );
 223         free( conn );
 224         return ret;
 225     }
 226
 227     switch (conn->sockaddr.ss_family)
 228     {
 229     case AF_INET:
 230         addr_len = sizeof(struct sockaddr_in);
 231         break;
 232     case AF_INET6:
 233         addr_len = sizeof(struct sockaddr_in6);
 234         break;
 235     default:
 236         ERR( "unhandled family %u\n", conn->sockaddr.ss_family );
 237         free( conn );
 238         return ERROR_INVALID_PARAMETER;
 239     }
 240
 241     if (timeout > 0) set_blocking( conn, FALSE );
 242
 243     if (!connect( conn->socket, (const struct sockaddr *)&conn->sockaddr, addr_len )) ret = ERROR_SUCCESS;
 244     else
 245     {
 246         ret = WSAGetLastError();
 247         if (ret == WSAEWOULDBLOCK || ret == WSAEINPROGRESS)
 248         {
 249             TIMEVAL timeval = { timeout / 1000, (timeout % 1000) * 1000 };
 250             FD_SET set_read, set_error;
 251             int res;
 252
 253             FD_ZERO( &set_read );
 254             FD_SET( conn->socket, &set_read );
 255             FD_ZERO( &set_error );
 256             FD_SET( conn->socket, &set_error );
 257             if ((res = select( conn->socket + 1, NULL, &set_read, &set_error, &timeval )) > 0)
 258             {
 259                 if (FD_ISSET(conn->socket, &set_read)) ret = ERROR_SUCCESS;
 260                 else                                   assert( FD_ISSET(conn->socket, &set_error) );
 261             }
 262             else if (!res) ret = ERROR_WINHTTP_TIMEOUT;
 263         }
 264     }
 265
 266     if (timeout > 0) set_blocking( conn, TRUE );
 267
 268     if (ret)
 269     {
 270         WARN( "unable to connect to host (%lu)\n", ret );
 271         closesocket( conn->socket );
 272         free( conn );
 273         return ret == ERROR_WINHTTP_TIMEOUT ? ERROR_WINHTTP_TIMEOUT : ERROR_WINHTTP_CANNOT_CONNECT;
 274     }
 275
 276     *ret_conn = conn;
 277     return ERROR_SUCCESS;
 278 }
 279
 280 void netconn_close( struct netconn *conn )
 281 {
 282     if (conn->secure)
 283     {
 284         free( conn->peek_msg_mem );
 285         free(conn->ssl_read_buf);
 286         free(conn->ssl_write_buf);
 287         free(conn->extra_buf);
 288         DeleteSecurityContext(&conn->ssl_ctx);
 289     }
 290     if (conn->socket != -1)
 291         closesocket( conn->socket );
 292     release_host( conn->host );
 293     if (conn->port)
 294         CloseHandle( conn->port );
 295     free(conn);
 296 }
 297
 298 DWORD netconn_secure_connect( struct netconn *conn, WCHAR *hostname, DWORD security_flags, CredHandle *cred_handle,
 299                               BOOL check_revocation )
 300 {
 301     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
 302     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
 303     BYTE *read_buf;
 304     SIZE_T read_buf_size = 2048;
 305     ULONG attrs = 0;
 306     CtxtHandle ctx;
 307     SSIZE_T size;
 308     const CERT_CONTEXT *cert;
 309     SECURITY_STATUS status;
 310     DWORD res = ERROR_SUCCESS;
 311
 312     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
 313         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
 314
 315     if (!(read_buf = malloc( read_buf_size ))) return ERROR_OUTOFMEMORY;
 316
 317     memset( &ctx, 0, sizeof(ctx) );
 318     status = InitializeSecurityContextW(cred_handle, NULL, hostname, isc_req_flags, 0, 0, NULL, 0,
 319             &ctx, &out_desc, &attrs, NULL);
 320
 321     assert(status != SEC_E_OK);
 322
 323     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
 324         if(out_buf.cbBuffer) {
 325             assert(status == SEC_I_CONTINUE_NEEDED);
 326
 327             TRACE( "sending %lu bytes\n", out_buf.cbBuffer );
 328
 329             size = sock_send(conn->socket, out_buf.pvBuffer, out_buf.cbBuffer, NULL);
 330             if(size != out_buf.cbBuffer) {
 331                 ERR("send failed\n");
 332                 res = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 333                 break;
 334             }
 335
 336             FreeContextBuffer(out_buf.pvBuffer);
 337             out_buf.pvBuffer = NULL;
 338             out_buf.cbBuffer = 0;
 339         }
 340
 341         if(status == SEC_I_CONTINUE_NEEDED) {
 342             assert(in_bufs[1].cbBuffer < read_buf_size);
 343
 344             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
 345             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
 346         }
 347
 348         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
 349         in_bufs[1].BufferType = SECBUFFER_EMPTY;
 350         in_bufs[1].cbBuffer = 0;
 351         in_bufs[1].pvBuffer = NULL;
 352
 353         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
 354             BYTE *new_read_buf;
 355
 356             new_read_buf = realloc(read_buf, read_buf_size + 1024);
 357             if(!new_read_buf) {
 358                 status = E_OUTOFMEMORY;
 359                 break;
 360             }
 361
 362             in_bufs[0].pvBuffer = read_buf = new_read_buf;
 363             read_buf_size += 1024;
 364         }
 365
 366         size = sock_recv(conn->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
 367         if(size < 1) {
 368             status = ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 369             break;
 370         }
 371
 372         TRACE( "recv %Iu bytes\n", size );
 373
 374         in_bufs[0].cbBuffer += size;
 375         in_bufs[0].pvBuffer = read_buf;
 376         status = InitializeSecurityContextW(cred_handle, &ctx, hostname,  isc_req_flags, 0, 0, &in_desc,
 377                 0, NULL, &out_desc, &attrs, NULL);
 378         TRACE( "InitializeSecurityContext ret %#lx\n", status );
 379
 380         if(status == SEC_E_OK) {
 381             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
 382                 FIXME("SECBUFFER_EXTRA not supported\n");
 383
 384             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &conn->ssl_sizes);
 385             if(status != SEC_E_OK) {
 386                 WARN("Could not get sizes\n");
 387                 break;
 388             }
 389
 390             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
 391             if(status == SEC_E_OK) {
 392                 res = netconn_verify_cert(cert, hostname, security_flags, check_revocation);
 393                 CertFreeCertificateContext(cert);
 394                 if(res != ERROR_SUCCESS) {
 395                     WARN( "cert verify failed: %lu\n", res );
 396                     break;
 397                 }
 398             }else {
 399                 WARN("Could not get cert\n");
 400                 break;
 401             }
 402
 403             conn->ssl_read_buf = malloc(conn->ssl_sizes.cbHeader + conn->ssl_sizes.cbMaximumMessage + conn->ssl_sizes.cbTrailer);
 404             if(!conn->ssl_read_buf) {
 405                 res = ERROR_OUTOFMEMORY;
 406                 break;
 407             }
 408             conn->ssl_write_buf = malloc(conn->ssl_sizes.cbHeader + conn->ssl_sizes.cbMaximumMessage + conn->ssl_sizes.cbTrailer);
 409             if(!conn->ssl_write_buf) {
 410                 res = ERROR_OUTOFMEMORY;
 411                 break;
 412             }
 413         }
 414     }
 415
 416     free(read_buf);
 417
 418     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
 419         WARN( "Failed to initialize security context: %#lx\n", status );
 420         free(conn->ssl_read_buf);
 421         conn->ssl_read_buf = NULL;
 422         free(conn->ssl_write_buf);
 423         conn->ssl_write_buf = NULL;
 424         DeleteSecurityContext(&ctx);
 425         return ERROR_WINHTTP_SECURE_CHANNEL_ERROR;
 426     }
 427
 428
 429     TRACE("established SSL connection\n");
 430     conn->secure = TRUE;
 431     conn->ssl_ctx = ctx;
 432     return ERROR_SUCCESS;
 433 }
 434
 435 static DWORD send_ssl_chunk( struct netconn *conn, const void *msg, size_t size, WSAOVERLAPPED *ovr )
 436 {
 437     SecBuffer bufs[4] = {
 438         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_write_buf},
 439         {size,  SECBUFFER_DATA, conn->ssl_write_buf+conn->ssl_sizes.cbHeader},
 440         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_write_buf+conn->ssl_sizes.cbHeader+size},
 441         {0, SECBUFFER_EMPTY, NULL}
 442     };
 443     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
 444     SECURITY_STATUS res;
 445
 446     memcpy( bufs[1].pvBuffer, msg, size );
 447     if ((res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0)) != SEC_E_OK)
 448     {
 449         WARN( "EncryptMessage failed: %#lx\n", res );
 450         return res;
 451     }
 452
 453     if (sock_send( conn->socket, conn->ssl_write_buf, bufs[0].cbBuffer + bufs[1].cbBuffer + bufs[2].cbBuffer, ovr ) < 1)
 454     {
 455         WARN("send failed\n");
 456         return WSAGetLastError();
 457     }
 458
 459     return ERROR_SUCCESS;
 460 }
 461
 462 DWORD netconn_send( struct netconn *conn, const void *msg, size_t len, int *sent, WSAOVERLAPPED *ovr )
 463 {
 464     DWORD err;
 465
 466     if (ovr && !conn->port)
 467     {
 468         if (!(conn->port = CreateIoCompletionPort( (HANDLE)(SOCKET)conn->socket, NULL, (ULONG_PTR)conn->socket, 0 )))
 469             ERR( "Failed to create port.\n" );
 470     }
 471
 472     if (conn->secure)
 473     {
 474         const BYTE *ptr = msg;
 475         size_t chunk_size;
 476         DWORD res;
 477
 478         *sent = 0;
 479         while (len)
 480         {
 481             chunk_size = min( len, conn->ssl_sizes.cbMaximumMessage );
 482             if ((res = send_ssl_chunk( conn, ptr, chunk_size, ovr )))
 483             {
 484                 if (res == WSA_IO_PENDING) *sent += chunk_size;
 485                 return res;
 486             }
 487             *sent += chunk_size;
 488             ptr += chunk_size;
 489             len -= chunk_size;
 490         }
 491
 492         return ERROR_SUCCESS;
 493     }
 494
 495     if ((*sent = sock_send( conn->socket, msg, len, ovr )) < 0)
 496     {
 497         err = WSAGetLastError();
 498         *sent = (err == WSA_IO_PENDING) ? len : 0;
 499         return err;
 500     }
 501     return ERROR_SUCCESS;
 502 }
 503
 504 static DWORD read_ssl_chunk( struct netconn *conn, void *buf, SIZE_T buf_size, SIZE_T *ret_size, BOOL *eof )
 505 {
 506     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
 507     SecBuffer bufs[4];
 508     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
 509     SSIZE_T size, buf_len;
 510     unsigned int i;
 511     SECURITY_STATUS res;
 512
 513     assert(conn->extra_len < ssl_buf_size);
 514
 515     if(conn->extra_len) {
 516         memcpy(conn->ssl_read_buf, conn->extra_buf, conn->extra_len);
 517         buf_len = conn->extra_len;
 518         conn->extra_len = 0;
 519         free(conn->extra_buf);
 520         conn->extra_buf = NULL;
 521     }else {
 522         if ((buf_len = sock_recv( conn->socket, conn->ssl_read_buf + conn->extra_len, ssl_buf_size - conn->extra_len, 0)) < 0)
 523             return WSAGetLastError();
 524
 525         if (!buf_len)
 526         {
 527             *eof = TRUE;
 528             return ERROR_SUCCESS;
 529         }
 530     }
 531
 532     *ret_size = 0;
 533     *eof = FALSE;
 534
 535     do {
 536         memset(bufs, 0, sizeof(bufs));
 537         bufs[0].BufferType = SECBUFFER_DATA;
 538         bufs[0].cbBuffer = buf_len;
 539         bufs[0].pvBuffer = conn->ssl_read_buf;
 540
 541         switch ((res = DecryptMessage( &conn->ssl_ctx, &buf_desc, 0, NULL )))
 542         {
 543         case SEC_E_OK:
 544             break;
 545
 546         case SEC_I_RENEGOTIATE:
 547             TRACE("renegotiate\n");
 548             return ERROR_WINHTTP_CLIENT_AUTH_CERT_NEEDED;
 549
 550         case SEC_I_CONTEXT_EXPIRED:
 551             TRACE("context expired\n");
 552             *eof = TRUE;
 553             return ERROR_SUCCESS;
 554
 555         case SEC_E_INCOMPLETE_MESSAGE:
 556             assert(buf_len < ssl_buf_size);
 557
 558             if ((size = sock_recv( conn->socket, conn->ssl_read_buf + buf_len, ssl_buf_size - buf_len, 0 )) < 1)
 559                 return SEC_E_INCOMPLETE_MESSAGE;
 560
 561             buf_len += size;
 562             continue;
 563
 564         default:
 565             WARN( "failed: %#lx\n", res );
 566             return res;
 567         }
 568     } while (res != SEC_E_OK);
 569
 570     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
 571         if(bufs[i].BufferType == SECBUFFER_DATA) {
 572             size = min(buf_size, bufs[i].cbBuffer);
 573             memcpy(buf, bufs[i].pvBuffer, size);
 574             if(size < bufs[i].cbBuffer) {
 575                 assert(!conn->peek_len);
 576                 conn->peek_msg_mem = conn->peek_msg = malloc(bufs[i].cbBuffer - size);
 577                 if(!conn->peek_msg)
 578                     return ERROR_OUTOFMEMORY;
 579                 conn->peek_len = bufs[i].cbBuffer-size;
 580                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
 581             }
 582
 583             *ret_size = size;
 584         }
 585     }
 586
 587     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
 588         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
 589             conn->extra_buf = malloc(bufs[i].cbBuffer);
 590             if(!conn->extra_buf)
 591                 return ERROR_OUTOFMEMORY;
 592
 593             conn->extra_len = bufs[i].cbBuffer;
 594             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
 595         }
 596     }
 597
 598     return ERROR_SUCCESS;
 599 }
 600
 601 DWORD netconn_recv( struct netconn *conn, void *buf, size_t len, int flags, int *recvd )
 602 {
 603     *recvd = 0;
 604     if (!len) return ERROR_SUCCESS;
 605
 606     if (conn->secure)
 607     {
 608         SIZE_T size;
 609         DWORD res;
 610         BOOL eof;
 611
 612         if (conn->peek_msg)
 613         {
 614             *recvd = min( len, conn->peek_len );
 615             memcpy( buf, conn->peek_msg, *recvd );
 616             conn->peek_len -= *recvd;
 617             conn->peek_msg += *recvd;
 618
 619             if (conn->peek_len == 0)
 620             {
 621                 free( conn->peek_msg_mem );
 622                 conn->peek_msg_mem = NULL;
 623                 conn->peek_msg = NULL;
 624             }
 625             /* check if we have enough data from the peek buffer */
 626             if (!(flags & MSG_WAITALL) || *recvd == len) return ERROR_SUCCESS;
 627         }
 628         size = *recvd;
 629
 630         do
 631         {
 632             SIZE_T cread = 0;
 633             if ((res = read_ssl_chunk( conn, (BYTE *)buf + size, len - size, &cread, &eof )))
 634             {
 635                 WARN( "read_ssl_chunk failed: %lu\n", res );
 636                 if (!size) return res;
 637                 break;
 638             }
 639             if (eof)
 640             {
 641                 TRACE("EOF\n");
 642                 break;
 643             }
 644             size += cread;
 645
 646         } while (!size || ((flags & MSG_WAITALL) && size < len));
 647
 648         TRACE( "received %Iu bytes\n", size );
 649         *recvd = size;
 650         return ERROR_SUCCESS;
 651     }
 652
 653     if ((*recvd = sock_recv( conn->socket, buf, len, flags )) < 0) return WSAGetLastError();
 654     return ERROR_SUCCESS;
 655 }
 656
 657 void netconn_cancel_io( struct netconn *conn )
 658 {
 659     SOCKET socket = InterlockedExchange( (LONG *)&conn->socket, -1 );
 660
 661     closesocket( socket );
 662 }
 663
 664 ULONG netconn_query_data_available( struct netconn *conn )
 665 {
 666     return conn->secure ? conn->peek_len : 0;
 667 }
 668
 669 DWORD netconn_set_timeout( struct netconn *netconn, BOOL send, int value )
 670 {
 671     int opt = send ? SO_SNDTIMEO : SO_RCVTIMEO;
 672     if (setsockopt( netconn->socket, SOL_SOCKET, opt, (void *)&value, sizeof(value) ) == -1)
 673     {
 674         DWORD err = WSAGetLastError();
 675         WARN( "setsockopt failed (%lu)\n", err );
 676         return err;
 677     }
 678     return ERROR_SUCCESS;
 679 }
 680
 681 BOOL netconn_is_alive( struct netconn *netconn )
 682 {
 683     SIZE_T size;
 684     int len;
 685     char b;
 686     DWORD err;
 687     BOOL eof;
 688
 689     set_blocking( netconn, FALSE );
 690     if (netconn->secure)
 691     {
 692         while (!netconn->peek_msg && !(err = read_ssl_chunk( netconn, NULL, 0, &size, &eof )) && !eof)
 693             ;
 694
 695         TRACE( "checking secure connection, err %lu\n", err );
 696
 697         if (netconn->peek_msg || err == WSAEWOULDBLOCK)
 698         {
 699             set_blocking( netconn, TRUE );
 700             return TRUE;
 701         }
 702         if (err != SEC_E_OK && err != SEC_E_INCOMPLETE_MESSAGE)
 703         {
 704             set_blocking( netconn, TRUE );
 705             return FALSE;
 706         }
 707     }
 708     len = sock_recv( netconn->socket, &b, 1, MSG_PEEK );
 709     err = WSAGetLastError();
 710     set_blocking( netconn, TRUE );
 711
 712     return len == 1 || (len == -1 && err == WSAEWOULDBLOCK);
 713 }
 714
 715 static DWORD resolve_hostname( const WCHAR *name, INTERNET_PORT port, struct sockaddr_storage *sa )
 716 {
 717     ADDRINFOW *res, hints;
 718     int ret;
 719
 720     memset( &hints, 0, sizeof(hints) );
 721     /* Prefer IPv4 to IPv6 addresses, since some web servers do not listen on
 722      * their IPv6 addresses even though they have IPv6 addresses in the DNS.
 723      */
 724     hints.ai_family = AF_INET;
 725
 726     ret = GetAddrInfoW( name, NULL, &hints, &res );
 727     if (ret != 0)
 728     {
 729         TRACE("failed to get IPv4 address of %s, retrying with IPv6\n", debugstr_w(name));
 730         hints.ai_family = AF_INET6;
 731         ret = GetAddrInfoW( name, NULL, &hints, &res );
 732         if (ret != 0)
 733         {
 734             TRACE("failed to get address of %s\n", debugstr_w(name));
 735             return ERROR_WINHTTP_NAME_NOT_RESOLVED;
 736         }
 737     }
 738     memcpy( sa, res->ai_addr, res->ai_addrlen );
 739     switch (res->ai_family)
 740     {
 741     case AF_INET:
 742         ((struct sockaddr_in *)sa)->sin_port = htons( port );
 743         break;
 744     case AF_INET6:
 745         ((struct sockaddr_in6 *)sa)->sin6_port = htons( port );
 746         break;
 747     }
 748
 749     FreeAddrInfoW( res );
 750     return ERROR_SUCCESS;
 751 }
 752
 753 struct async_resolve
 754 {
 755     LONG                     ref;
 756     WCHAR                   *hostname;
 757     INTERNET_PORT            port;
 758     struct sockaddr_storage  addr;
 759     DWORD                    result;
 760     HANDLE                   done;
 761 };
 762
 763 static struct async_resolve *create_async_resolve( const WCHAR *hostname, INTERNET_PORT port )
 764 {
 765     struct async_resolve *ret;
 766
 767     if (!(ret = malloc(sizeof(*ret))))
 768     {
 769         ERR( "No memory.\n" );
 770         return NULL;
 771     }
 772     ret->ref = 1;
 773     ret->hostname = strdupW( hostname );
 774     ret->port     = port;
 775     if (!(ret->done = CreateEventW( NULL, FALSE, FALSE, NULL )))
 776     {
 777         free( ret->hostname );
 778         free( ret );
 779         return NULL;
 780     }
 781     return ret;
 782 }
 783
 784 static void async_resolve_release( struct async_resolve *async )
 785 {
 786     if (InterlockedDecrement( &async->ref )) return;
 787
 788     free( async->hostname );
 789     CloseHandle( async->done );
 790     free( async );
 791 }
 792
 793 static void CALLBACK resolve_proc( TP_CALLBACK_INSTANCE *instance, void *ctx )
 794 {
 795     struct async_resolve *async = ctx;
 796
 797     async->result = resolve_hostname( async->hostname, async->port, &async->addr );
 798     SetEvent( async->done );
 799     async_resolve_release( async );
 800 }
 801
 802 DWORD netconn_resolve( WCHAR *hostname, INTERNET_PORT port, struct sockaddr_storage *addr, int timeout )
 803 {
 804     DWORD ret;
 805
 806     if (!timeout) ret = resolve_hostname( hostname, port, addr );
 807     else
 808     {
 809         struct async_resolve *async;
 810
 811         if (!(async = create_async_resolve( hostname, port )))
 812             return ERROR_OUTOFMEMORY;
 813
 814         InterlockedIncrement( &async->ref );
 815         if (!TrySubmitThreadpoolCallback( resolve_proc, async, NULL ))
 816         {
 817             InterlockedDecrement( &async->ref );
 818             async_resolve_release( async );
 819             return GetLastError();
 820         }
 821         if (WaitForSingleObject( async->done, timeout ) != WAIT_OBJECT_0) ret = ERROR_WINHTTP_TIMEOUT;
 822         else
 823         {
 824             *addr = async->addr;
 825             ret = async->result;
 826         }
 827         async_resolve_release( async );
 828     }
 829
 830     return ret;
 831 }
 832
 833 const void *netconn_get_certificate( struct netconn *conn )
 834 {
 835     const CERT_CONTEXT *ret;
 836     SECURITY_STATUS res;
 837
 838     if (!conn->secure) return NULL;
 839     res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
 840     return res == SEC_E_OK ? ret : NULL;
 841 }
 842
 843 int netconn_get_cipher_strength( struct netconn *conn )
 844 {
 845     SecPkgContext_ConnectionInfo conn_info;
 846     SECURITY_STATUS res;
 847
 848     if (!conn->secure) return 0;
 849     res = QueryContextAttributesW(&conn->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
 850     if(res != SEC_E_OK)
 851         WARN( "QueryContextAttributesW failed: %#lx\n", res );
 852     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
 853 }