dlls/wininet/netconnection.c

   1 /*
   2  * Wininet - networking layer
   3  *
   4  * Copyright 2002 TransGaming Technologies Inc.
   5  * Copyright 2013 Jacek Caban for CodeWeavers
   6  *
   7  * David Hammerton
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include "ws2tcpip.h"
  25
  26 #include <time.h>
  27 #include <stdarg.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31 #include <assert.h>
  32
  33 #include "windef.h"
  34 #include "winbase.h"
  35 #include "wininet.h"
  36 #include "winerror.h"
  37
  38 #include "wine/debug.h"
  39 #include "internet.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(wininet);
  42
  43 static DWORD netconn_verify_cert(netconn_t *conn, PCCERT_CONTEXT cert, HCERTSTORE store)
  44 {
  45     BOOL ret;
  46     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
  47     PCCERT_CHAIN_CONTEXT chain;
  48     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
  49     char *server_auth[] = { oid_server_auth };
  50     DWORD err = ERROR_SUCCESS, errors;
  51
  52     static const DWORD supportedErrors =
  53         CERT_TRUST_IS_NOT_TIME_VALID |
  54         CERT_TRUST_IS_UNTRUSTED_ROOT |
  55         CERT_TRUST_IS_PARTIAL_CHAIN |
  56         CERT_TRUST_IS_NOT_SIGNATURE_VALID |
  57         CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
  58
  59     TRACE("verifying %s\n", debugstr_w(conn->server->name));
  60
  61     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
  62     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
  63     if (!(ret = CertGetCertificateChain(NULL, cert, NULL, store, &chainPara, 0, NULL, &chain))) {
  64         TRACE("failed\n");
  65         return GetLastError();
  66     }
  67
  68     errors = chain->TrustStatus.dwErrorStatus;
  69
  70     do {
  71         /* This seems strange, but that's what tests show */
  72         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
  73             WARN("ERROR_INTERNET_SEC_CERT_REV_FAILED\n");
  74             err = ERROR_INTERNET_SEC_CERT_REV_FAILED;
  75             if(conn->mask_errors)
  76                 conn->security_flags |= _SECURITY_FLAG_CERT_REV_FAILED;
  77             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION))
  78                 break;
  79         }
  80
  81         if (chain->TrustStatus.dwErrorStatus & ~supportedErrors) {
  82             WARN("error status %lx\n", chain->TrustStatus.dwErrorStatus & ~supportedErrors);
  83             err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
  84             errors &= supportedErrors;
  85             if(!conn->mask_errors)
  86                 break;
  87             WARN("unknown error flags\n");
  88         }
  89
  90         if(errors & CERT_TRUST_IS_NOT_TIME_VALID) {
  91             WARN("CERT_TRUST_IS_NOT_TIME_VALID\n");
  92             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID)) {
  93                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_DATE_INVALID;
  94                 if(!conn->mask_errors)
  95                     break;
  96                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_DATE;
  97             }
  98             errors &= ~CERT_TRUST_IS_NOT_TIME_VALID;
  99         }
 100
 101         if(errors & CERT_TRUST_IS_UNTRUSTED_ROOT) {
 102             WARN("CERT_TRUST_IS_UNTRUSTED_ROOT\n");
 103             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 104                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 105                 if(!conn->mask_errors)
 106                     break;
 107                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 108             }
 109             errors &= ~CERT_TRUST_IS_UNTRUSTED_ROOT;
 110         }
 111
 112         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
 113             WARN("CERT_TRUST_IS_PARTIAL_CHAIN\n");
 114             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 115                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 116                 if(!conn->mask_errors)
 117                     break;
 118                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 119             }
 120             errors &= ~CERT_TRUST_IS_PARTIAL_CHAIN;
 121         }
 122
 123         if(errors & CERT_TRUST_IS_NOT_SIGNATURE_VALID) {
 124             WARN("CERT_TRUST_IS_NOT_SIGNATURE_VALID\n");
 125             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 126                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 127                 if(!conn->mask_errors)
 128                     break;
 129                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 130             }
 131             errors &= ~CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 132         }
 133
 134         if(errors & CERT_TRUST_IS_NOT_VALID_FOR_USAGE) {
 135             WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE\n");
 136             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_WRONG_USAGE)) {
 137                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 138                 if(!conn->mask_errors)
 139                     break;
 140                 WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE, unknown error flags\n");
 141             }
 142             errors &= ~CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
 143         }
 144
 145         if(err == ERROR_INTERNET_SEC_CERT_REV_FAILED) {
 146             assert(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION);
 147             err = ERROR_SUCCESS;
 148         }
 149     }while(0);
 150
 151     if(!err || conn->mask_errors) {
 152         CERT_CHAIN_POLICY_PARA policyPara;
 153         SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
 154         CERT_CHAIN_POLICY_STATUS policyStatus;
 155         CERT_CHAIN_CONTEXT chainCopy;
 156
 157         /* Clear chain->TrustStatus.dwErrorStatus so
 158          * CertVerifyCertificateChainPolicy will verify additional checks
 159          * rather than stopping with an existing, ignored error.
 160          */
 161         memcpy(&chainCopy, chain, sizeof(chainCopy));
 162         chainCopy.TrustStatus.dwErrorStatus = 0;
 163         sslExtraPolicyPara.cbSize = sizeof(sslExtraPolicyPara);
 164         sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
 165         sslExtraPolicyPara.pwszServerName = conn->server->name;
 166         sslExtraPolicyPara.fdwChecks = conn->security_flags;
 167         policyPara.cbSize = sizeof(policyPara);
 168         policyPara.dwFlags = 0;
 169         policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
 170         ret = CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL,
 171                 &chainCopy, &policyPara, &policyStatus);
 172         /* Any error in the policy status indicates that the
 173          * policy couldn't be verified.
 174          */
 175         if(ret) {
 176             if(policyStatus.dwError == CERT_E_CN_NO_MATCH) {
 177                 WARN("CERT_E_CN_NO_MATCH\n");
 178                 if(conn->mask_errors)
 179                     conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CN;
 180                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_CN_INVALID;
 181             }else if(policyStatus.dwError) {
 182                 WARN("policyStatus.dwError %lx\n", policyStatus.dwError);
 183                 if(conn->mask_errors)
 184                     WARN("unknown error flags for policy status %lx\n", policyStatus.dwError);
 185                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 186             }
 187         }else {
 188             err = GetLastError();
 189         }
 190     }
 191
 192     if(err) {
 193         WARN("failed %lu\n", err);
 194         CertFreeCertificateChain(chain);
 195         if(conn->server->cert_chain) {
 196             CertFreeCertificateChain(conn->server->cert_chain);
 197             conn->server->cert_chain = NULL;
 198         }
 199         if(conn->mask_errors)
 200             conn->server->security_flags |= conn->security_flags & _SECURITY_ERROR_FLAGS_MASK;
 201         return err;
 202     }
 203
 204     /* FIXME: Reuse cached chain */
 205     if(conn->server->cert_chain)
 206         CertFreeCertificateChain(chain);
 207     else
 208         conn->server->cert_chain = chain;
 209     return ERROR_SUCCESS;
 210 }
 211
 212 static SecHandle cred_handle, compat_cred_handle;
 213 static BOOL cred_handle_initialized, have_compat_cred_handle;
 214
 215 static CRITICAL_SECTION init_sechandle_cs;
 216 static CRITICAL_SECTION_DEBUG init_sechandle_cs_debug = {
 217     0, 0, &init_sechandle_cs,
 218     { &init_sechandle_cs_debug.ProcessLocksList,
 219       &init_sechandle_cs_debug.ProcessLocksList },
 220     0, 0, { (DWORD_PTR)(__FILE__ ": init_sechandle_cs") }
 221 };
 222 static CRITICAL_SECTION init_sechandle_cs = { &init_sechandle_cs_debug, -1, 0, 0, 0, 0 };
 223
 224 static BOOL ensure_cred_handle(void)
 225 {
 226     SECURITY_STATUS res = SEC_E_OK;
 227
 228     EnterCriticalSection(&init_sechandle_cs);
 229
 230     if(!cred_handle_initialized) {
 231         SCHANNEL_CRED cred = {SCHANNEL_CRED_VERSION};
 232         SecPkgCred_SupportedProtocols prots;
 233
 234         res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 235                 NULL, NULL, &cred_handle, NULL);
 236         if(res == SEC_E_OK) {
 237             res = QueryCredentialsAttributesA(&cred_handle, SECPKG_ATTR_SUPPORTED_PROTOCOLS, &prots);
 238             if(res != SEC_E_OK || (prots.grbitProtocol & SP_PROT_TLS1_1PLUS_CLIENT)) {
 239                 cred.grbitEnabledProtocols = prots.grbitProtocol & ~SP_PROT_TLS1_1PLUS_CLIENT;
 240                 res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 241                        NULL, NULL, &compat_cred_handle, NULL);
 242                 have_compat_cred_handle = res == SEC_E_OK;
 243             }
 244         }
 245
 246         cred_handle_initialized = res == SEC_E_OK;
 247     }
 248
 249     LeaveCriticalSection(&init_sechandle_cs);
 250
 251     if(res != SEC_E_OK) {
 252         WARN("Failed: %08lx\n", res);
 253         return FALSE;
 254     }
 255
 256     return TRUE;
 257 }
 258
 259 static BOOL winsock_loaded = FALSE;
 260
 261 static BOOL WINAPI winsock_startup(INIT_ONCE *once, void *param, void **context)
 262 {
 263     WSADATA wsa_data;
 264     DWORD res;
 265
 266     res = WSAStartup(MAKEWORD(1,1), &wsa_data);
 267     if(res == ERROR_SUCCESS)
 268         winsock_loaded = TRUE;
 269     else
 270         ERR("WSAStartup failed: %lu\n", res);
 271     return TRUE;
 272 }
 273
 274 void init_winsock(void)
 275 {
 276     static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
 277     InitOnceExecuteOnce(&init_once, winsock_startup, NULL, NULL);
 278 }
 279
 280 static void set_socket_blocking(netconn_t *conn, BOOL is_blocking)
 281 {
 282     if(conn->is_blocking != is_blocking) {
 283         ULONG arg = !is_blocking;
 284         ioctlsocket(conn->socket, FIONBIO, &arg);
 285     }
 286     conn->is_blocking = is_blocking;
 287 }
 288
 289 static DWORD create_netconn_socket(server_t *server, netconn_t *netconn, DWORD timeout)
 290 {
 291     int result;
 292     ULONG flag;
 293     DWORD res;
 294
 295     init_winsock();
 296
 297     assert(server->addr_len);
 298     result = netconn->socket = socket(server->addr.ss_family, SOCK_STREAM, 0);
 299     if(result != -1) {
 300         set_socket_blocking(netconn, FALSE);
 301         result = connect(netconn->socket, (struct sockaddr*)&server->addr, server->addr_len);
 302         if(result == -1)
 303         {
 304             res = WSAGetLastError();
 305             if (res == WSAEINPROGRESS || res == WSAEWOULDBLOCK) {
 306                 FD_SET set;
 307                 int res;
 308                 socklen_t len = sizeof(res);
 309                 TIMEVAL timeout_timeval = {0, timeout*1000};
 310
 311                 FD_ZERO(&set);
 312                 FD_SET(netconn->socket, &set);
 313                 res = select(netconn->socket+1, NULL, &set, NULL, &timeout_timeval);
 314                 if(!res || res == SOCKET_ERROR) {
 315                     closesocket(netconn->socket);
 316                     netconn->socket = -1;
 317                     return ERROR_INTERNET_CANNOT_CONNECT;
 318                 }
 319                 if (!getsockopt(netconn->socket, SOL_SOCKET, SO_ERROR, (void *)&res, &len) && !res)
 320                     result = 0;
 321             }
 322         }
 323         if(result == -1)
 324         {
 325             closesocket(netconn->socket);
 326             netconn->socket = -1;
 327         }
 328     }
 329     if(result == -1)
 330         return ERROR_INTERNET_CANNOT_CONNECT;
 331
 332     flag = 1;
 333     result = setsockopt(netconn->socket, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(flag));
 334     if(result < 0)
 335         WARN("setsockopt(TCP_NODELAY) failed\n");
 336
 337     return ERROR_SUCCESS;
 338 }
 339
 340 DWORD create_netconn(server_t *server, DWORD security_flags, BOOL mask_errors, DWORD timeout, netconn_t **ret)
 341 {
 342     netconn_t *netconn;
 343     int result;
 344
 345     netconn = calloc(1, sizeof(*netconn));
 346     if(!netconn)
 347         return ERROR_OUTOFMEMORY;
 348
 349     netconn->socket = -1;
 350     netconn->security_flags = security_flags | server->security_flags;
 351     netconn->mask_errors = mask_errors;
 352     list_init(&netconn->pool_entry);
 353     SecInvalidateHandle(&netconn->ssl_ctx);
 354
 355     result = create_netconn_socket(server, netconn, timeout);
 356     if (result != ERROR_SUCCESS) {
 357         free(netconn);
 358         return result;
 359     }
 360
 361     server_addref(server);
 362     netconn->server = server;
 363     *ret = netconn;
 364     return result;
 365 }
 366
 367 BOOL is_valid_netconn(netconn_t *netconn)
 368 {
 369     return netconn && netconn->socket != -1;
 370 }
 371
 372 void close_netconn(netconn_t *netconn)
 373 {
 374     closesocket(netconn->socket);
 375     netconn->socket = -1;
 376 }
 377
 378 void free_netconn(netconn_t *netconn)
 379 {
 380     server_release(netconn->server);
 381
 382     if (netconn->secure) {
 383         free(netconn->peek_msg_mem);
 384         netconn->peek_msg_mem = NULL;
 385         netconn->peek_msg = NULL;
 386         netconn->peek_len = 0;
 387         free(netconn->ssl_buf);
 388         netconn->ssl_buf = NULL;
 389         free(netconn->extra_buf);
 390         netconn->extra_buf = NULL;
 391         netconn->extra_len = 0;
 392     }
 393     if (SecIsValidHandle(&netconn->ssl_ctx))
 394         DeleteSecurityContext(&netconn->ssl_ctx);
 395
 396     close_netconn(netconn);
 397     free(netconn);
 398 }
 399
 400 void NETCON_unload(void)
 401 {
 402     if(cred_handle_initialized)
 403         FreeCredentialsHandle(&cred_handle);
 404     if(have_compat_cred_handle)
 405         FreeCredentialsHandle(&compat_cred_handle);
 406     DeleteCriticalSection(&init_sechandle_cs);
 407     if(winsock_loaded)
 408         WSACleanup();
 409 }
 410
 411 int sock_send(int fd, const void *msg, size_t len, int flags)
 412 {
 413     int ret;
 414     do
 415     {
 416         ret = send(fd, msg, len, flags);
 417     }
 418     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 419     return ret;
 420 }
 421
 422 int sock_recv(int fd, void *msg, size_t len, int flags)
 423 {
 424     int ret;
 425     do
 426     {
 427         ret = recv(fd, msg, len, flags);
 428     }
 429     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 430     return ret;
 431 }
 432
 433 static DWORD netcon_secure_connect_setup(netconn_t *connection, BOOL compat_mode)
 434 {
 435     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
 436     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
 437     SecHandle *cred = &cred_handle;
 438     BYTE *read_buf;
 439     SIZE_T read_buf_size = 2048;
 440     ULONG attrs = 0;
 441     CtxtHandle ctx;
 442     SSIZE_T size;
 443     int bits;
 444     const CERT_CONTEXT *cert;
 445     SECURITY_STATUS status;
 446     DWORD res = ERROR_SUCCESS;
 447
 448     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
 449         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
 450
 451     if(!ensure_cred_handle())
 452         return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 453
 454     if(compat_mode) {
 455         if(!have_compat_cred_handle)
 456             return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 457         cred = &compat_cred_handle;
 458     }
 459
 460     read_buf = malloc(read_buf_size);
 461     if(!read_buf)
 462         return ERROR_OUTOFMEMORY;
 463
 464     status = InitializeSecurityContextW(cred, NULL, connection->server->name, isc_req_flags, 0, 0, NULL, 0,
 465             &ctx, &out_desc, &attrs, NULL);
 466
 467     assert(status != SEC_E_OK);
 468
 469     set_socket_blocking(connection, TRUE);
 470
 471     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
 472         if(out_buf.cbBuffer) {
 473             assert(status == SEC_I_CONTINUE_NEEDED);
 474
 475             TRACE("sending %lu bytes\n", out_buf.cbBuffer);
 476
 477             size = sock_send(connection->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
 478             if(size != out_buf.cbBuffer) {
 479                 ERR("send failed\n");
 480                 status = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 481                 break;
 482             }
 483
 484             FreeContextBuffer(out_buf.pvBuffer);
 485             out_buf.pvBuffer = NULL;
 486             out_buf.cbBuffer = 0;
 487         }
 488
 489         if(status == SEC_I_CONTINUE_NEEDED) {
 490             assert(in_bufs[1].cbBuffer < read_buf_size);
 491
 492             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
 493             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
 494         }
 495
 496         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
 497         in_bufs[1].BufferType = SECBUFFER_EMPTY;
 498         in_bufs[1].cbBuffer = 0;
 499         in_bufs[1].pvBuffer = NULL;
 500
 501         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
 502             BYTE *new_read_buf;
 503
 504             new_read_buf = realloc(read_buf, read_buf_size + 1024);
 505             if(!new_read_buf) {
 506                 status = E_OUTOFMEMORY;
 507                 break;
 508             }
 509
 510             in_bufs[0].pvBuffer = read_buf = new_read_buf;
 511             read_buf_size += 1024;
 512         }
 513
 514         size = sock_recv(connection->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
 515         if(size < 1) {
 516             WARN("recv error\n");
 517             res = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 518             break;
 519         }
 520
 521         TRACE("recv %Iu bytes\n", size);
 522
 523         in_bufs[0].cbBuffer += size;
 524         in_bufs[0].pvBuffer = read_buf;
 525         status = InitializeSecurityContextW(cred, &ctx, connection->server->name,  isc_req_flags, 0, 0, &in_desc,
 526                 0, NULL, &out_desc, &attrs, NULL);
 527         TRACE("InitializeSecurityContext ret %08lx\n", status);
 528
 529         if(status == SEC_E_OK) {
 530             if(SecIsValidHandle(&connection->ssl_ctx))
 531                 DeleteSecurityContext(&connection->ssl_ctx);
 532             connection->ssl_ctx = ctx;
 533
 534             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
 535                 FIXME("SECBUFFER_EXTRA not supported\n");
 536
 537             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &connection->ssl_sizes);
 538             if(status != SEC_E_OK) {
 539                 WARN("Could not get sizes\n");
 540                 break;
 541             }
 542
 543             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
 544             if(status == SEC_E_OK) {
 545                 res = netconn_verify_cert(connection, cert, cert->hCertStore);
 546                 CertFreeCertificateContext(cert);
 547                 if(res != ERROR_SUCCESS) {
 548                     WARN("cert verify failed: %lu\n", res);
 549                     break;
 550                 }
 551             }else {
 552                 WARN("Could not get cert\n");
 553                 break;
 554             }
 555
 556             connection->ssl_buf = malloc(connection->ssl_sizes.cbHeader + connection->ssl_sizes.cbMaximumMessage
 557                     + connection->ssl_sizes.cbTrailer);
 558             if(!connection->ssl_buf) {
 559                 res = GetLastError();
 560                 break;
 561             }
 562         }
 563     }
 564
 565     free(read_buf);
 566
 567     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
 568         WARN("Failed to establish SSL connection: %08lx (%lu)\n", status, res);
 569         free(connection->ssl_buf);
 570         connection->ssl_buf = NULL;
 571         return res ? res : ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 572     }
 573
 574     TRACE("established SSL connection\n");
 575     connection->secure = TRUE;
 576     connection->security_flags |= SECURITY_FLAG_SECURE;
 577
 578     bits = NETCON_GetCipherStrength(connection);
 579     if (bits >= 128)
 580         connection->security_flags |= SECURITY_FLAG_STRENGTH_STRONG;
 581     else if (bits >= 56)
 582         connection->security_flags |= SECURITY_FLAG_STRENGTH_MEDIUM;
 583     else
 584         connection->security_flags |= SECURITY_FLAG_STRENGTH_WEAK;
 585
 586     if(connection->mask_errors)
 587         connection->server->security_flags = connection->security_flags;
 588     return ERROR_SUCCESS;
 589 }
 590
 591 /******************************************************************************
 592  * NETCON_secure_connect
 593  * Initiates a secure connection over an existing plaintext connection.
 594  */
 595 DWORD NETCON_secure_connect(netconn_t *connection, server_t *server)
 596 {
 597     DWORD res;
 598
 599     /* can't connect if we are already connected */
 600     if(connection->secure) {
 601         ERR("already connected\n");
 602         return ERROR_INTERNET_CANNOT_CONNECT;
 603     }
 604
 605     if(server != connection->server) {
 606         server_release(connection->server);
 607         server_addref(server);
 608         connection->server = server;
 609     }
 610
 611     /* connect with given TLS options */
 612     res = netcon_secure_connect_setup(connection, FALSE);
 613     if (res == ERROR_SUCCESS)
 614         return res;
 615
 616     /* FIXME: when got version alert and FIN from server */
 617     /* fallback to connect without TLSv1.1/TLSv1.2        */
 618     if (res == ERROR_INTERNET_SECURITY_CHANNEL_ERROR && have_compat_cred_handle)
 619     {
 620         closesocket(connection->socket);
 621         res = create_netconn_socket(connection->server, connection, 500);
 622         if (res != ERROR_SUCCESS)
 623             return res;
 624         res = netcon_secure_connect_setup(connection, TRUE);
 625     }
 626     return res;
 627 }
 628
 629 static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
 630 {
 631     SecBuffer bufs[4] = {
 632         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
 633         {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
 634         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
 635         {0, SECBUFFER_EMPTY, NULL}
 636     };
 637     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
 638     SECURITY_STATUS res;
 639
 640     memcpy(bufs[1].pvBuffer, msg, size);
 641     res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
 642     if(res != SEC_E_OK) {
 643         WARN("EncryptMessage failed\n");
 644         return FALSE;
 645     }
 646
 647     if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
 648         WARN("send failed\n");
 649         return FALSE;
 650     }
 651
 652     return TRUE;
 653 }
 654
 655 /******************************************************************************
 656  * NETCON_send
 657  * Basically calls 'send()' unless we should use SSL
 658  * number of chars send is put in *sent
 659  */
 660 DWORD NETCON_send(netconn_t *connection, const void *msg, size_t len, int flags,
 661                 int *sent /* out */)
 662 {
 663     /* send is always blocking. */
 664     set_socket_blocking(connection, TRUE);
 665
 666     if(!connection->secure)
 667     {
 668         *sent = sock_send(connection->socket, msg, len, flags);
 669         return *sent == -1 ? WSAGetLastError() : ERROR_SUCCESS;
 670     }
 671     else
 672     {
 673         const BYTE *ptr = msg;
 674         size_t chunk_size;
 675
 676         *sent = 0;
 677
 678         while(len) {
 679             chunk_size = min(len, connection->ssl_sizes.cbMaximumMessage);
 680             if(!send_ssl_chunk(connection, ptr, chunk_size))
 681                 return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 682
 683             *sent += chunk_size;
 684             ptr += chunk_size;
 685             len -= chunk_size;
 686         }
 687
 688         return ERROR_SUCCESS;
 689     }
 690 }
 691
 692 static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, BOOL blocking, SIZE_T *ret_size, BOOL *eof)
 693 {
 694     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
 695     SecBuffer bufs[4];
 696     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
 697     SSIZE_T size, buf_len = 0;
 698     int i;
 699     SECURITY_STATUS res;
 700
 701     assert(conn->extra_len < ssl_buf_size);
 702
 703     if(conn->extra_len) {
 704         memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
 705         buf_len = conn->extra_len;
 706         conn->extra_len = 0;
 707         free(conn->extra_buf);
 708         conn->extra_buf = NULL;
 709     }
 710
 711     set_socket_blocking(conn, blocking && !buf_len);
 712     size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 713     if(size < 0) {
 714         if(!buf_len) {
 715             if(WSAGetLastError() == WSAEWOULDBLOCK) {
 716                 TRACE("would block\n");
 717                 return WSAEWOULDBLOCK;
 718             }
 719             WARN("recv failed\n");
 720             return ERROR_INTERNET_CONNECTION_ABORTED;
 721         }
 722     }else {
 723         buf_len += size;
 724     }
 725
 726     if(!buf_len) {
 727         TRACE("EOF\n");
 728         *eof = TRUE;
 729         *ret_size = 0;
 730         return ERROR_SUCCESS;
 731     }
 732
 733     *eof = FALSE;
 734
 735     do {
 736         memset(bufs, 0, sizeof(bufs));
 737         bufs[0].BufferType = SECBUFFER_DATA;
 738         bufs[0].cbBuffer = buf_len;
 739         bufs[0].pvBuffer = conn->ssl_buf;
 740
 741         res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
 742         switch(res) {
 743         case SEC_E_OK:
 744             break;
 745         case SEC_I_CONTEXT_EXPIRED:
 746             TRACE("context expired\n");
 747             *eof = TRUE;
 748             return ERROR_SUCCESS;
 749         case SEC_E_INCOMPLETE_MESSAGE:
 750             assert(buf_len < ssl_buf_size);
 751
 752             set_socket_blocking(conn, blocking);
 753             size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 754             if(size < 1) {
 755                 if(size < 0 && WSAGetLastError() == WSAEWOULDBLOCK) {
 756                     TRACE("would block\n");
 757
 758                     /* FIXME: Optimize extra_buf usage. */
 759                     conn->extra_buf = malloc(buf_len);
 760                     if(!conn->extra_buf)
 761                         return ERROR_NOT_ENOUGH_MEMORY;
 762
 763                     conn->extra_len = buf_len;
 764                     memcpy(conn->extra_buf, conn->ssl_buf, conn->extra_len);
 765                     return WSAEWOULDBLOCK;
 766                 }
 767
 768                 return ERROR_INTERNET_CONNECTION_ABORTED;
 769             }
 770
 771             buf_len += size;
 772             continue;
 773         default:
 774             WARN("failed: %08lx\n", res);
 775             return ERROR_INTERNET_CONNECTION_ABORTED;
 776         }
 777     } while(res != SEC_E_OK);
 778
 779     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
 780         if(bufs[i].BufferType == SECBUFFER_DATA) {
 781             size = min(buf_size, bufs[i].cbBuffer);
 782             memcpy(buf, bufs[i].pvBuffer, size);
 783             if(size < bufs[i].cbBuffer) {
 784                 assert(!conn->peek_len);
 785                 conn->peek_msg_mem = conn->peek_msg = malloc(bufs[i].cbBuffer - size);
 786                 if(!conn->peek_msg)
 787                     return ERROR_NOT_ENOUGH_MEMORY;
 788                 conn->peek_len = bufs[i].cbBuffer-size;
 789                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
 790             }
 791
 792             *ret_size = size;
 793         }
 794     }
 795
 796     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
 797         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
 798             conn->extra_buf = malloc(bufs[i].cbBuffer);
 799             if(!conn->extra_buf)
 800                 return ERROR_NOT_ENOUGH_MEMORY;
 801
 802             conn->extra_len = bufs[i].cbBuffer;
 803             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
 804         }
 805     }
 806
 807     return ERROR_SUCCESS;
 808 }
 809
 810 /******************************************************************************
 811  * NETCON_recv
 812  * Basically calls 'recv()' unless we should use SSL
 813  * number of chars received is put in *recvd
 814  */
 815 DWORD NETCON_recv(netconn_t *connection, void *buf, size_t len, BOOL blocking, int *recvd)
 816 {
 817     *recvd = 0;
 818     if (!len)
 819         return ERROR_SUCCESS;
 820
 821     if (!connection->secure)
 822     {
 823         set_socket_blocking(connection, blocking);
 824         *recvd = sock_recv(connection->socket, buf, len, 0);
 825         return *recvd == -1 ? WSAGetLastError() :  ERROR_SUCCESS;
 826     }
 827     else
 828     {
 829         SIZE_T size = 0;
 830         BOOL eof;
 831         DWORD res;
 832
 833         if(connection->peek_msg) {
 834             size = min(len, connection->peek_len);
 835             memcpy(buf, connection->peek_msg, size);
 836             connection->peek_len -= size;
 837             connection->peek_msg += size;
 838
 839             if(!connection->peek_len) {
 840                 free(connection->peek_msg_mem);
 841                 connection->peek_msg_mem = connection->peek_msg = NULL;
 842             }
 843
 844             *recvd = size;
 845             return ERROR_SUCCESS;
 846         }
 847
 848         do {
 849             res = read_ssl_chunk(connection, (BYTE*)buf, len, blocking, &size, &eof);
 850             if(res != ERROR_SUCCESS) {
 851                 if(res == WSAEWOULDBLOCK) {
 852                     if(size)
 853                         res = ERROR_SUCCESS;
 854                 }else {
 855                     WARN("read_ssl_chunk failed\n");
 856                 }
 857                 break;
 858             }
 859         }while(!size && !eof);
 860
 861         TRACE("received %Id bytes\n", size);
 862         *recvd = size;
 863         return res;
 864     }
 865 }
 866
 867 BOOL NETCON_is_alive(netconn_t *netconn)
 868 {
 869     int len;
 870     char b;
 871
 872     set_socket_blocking(netconn, FALSE);
 873     len = sock_recv(netconn->socket, &b, 1, MSG_PEEK);
 874
 875     return len == 1 || (len == -1 && WSAGetLastError() == WSAEWOULDBLOCK);
 876 }
 877
 878 LPCVOID NETCON_GetCert(netconn_t *connection)
 879 {
 880     const CERT_CONTEXT *ret;
 881     SECURITY_STATUS res;
 882
 883     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
 884     return res == SEC_E_OK ? ret : NULL;
 885 }
 886
 887 int NETCON_GetCipherStrength(netconn_t *connection)
 888 {
 889     SecPkgContext_ConnectionInfo conn_info;
 890     SECURITY_STATUS res;
 891
 892     if (!connection->secure)
 893         return 0;
 894
 895     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
 896     if(res != SEC_E_OK)
 897         WARN("QueryContextAttributesW failed: %08lx\n", res);
 898     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
 899 }
 900
 901 DWORD NETCON_set_timeout(netconn_t *connection, BOOL send, DWORD value)
 902 {
 903     int result;
 904
 905     result = setsockopt(connection->socket, SOL_SOCKET,
 906                         send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&value,
 907                         sizeof(value));
 908     if (result == -1)
 909     {
 910         WARN("setsockopt failed\n");
 911         return WSAGetLastError();
 912     }
 913     return ERROR_SUCCESS;
 914 }