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 #define NONAMELESSUNION
  25
  26 #include "ws2tcpip.h"
  27
  28 #include <time.h>
  29 #include <stdarg.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34
  35 #include "wine/library.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "wininet.h"
  39 #include "winerror.h"
  40
  41 #include "wine/debug.h"
  42 #include "internet.h"
  43
  44 WINE_DEFAULT_DEBUG_CHANNEL(wininet);
  45
  46 static DWORD netconn_verify_cert(netconn_t *conn, PCCERT_CONTEXT cert, HCERTSTORE store)
  47 {
  48     BOOL ret;
  49     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
  50     PCCERT_CHAIN_CONTEXT chain;
  51     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
  52     char *server_auth[] = { oid_server_auth };
  53     DWORD err = ERROR_SUCCESS, errors;
  54
  55     static const DWORD supportedErrors =
  56         CERT_TRUST_IS_NOT_TIME_VALID |
  57         CERT_TRUST_IS_UNTRUSTED_ROOT |
  58         CERT_TRUST_IS_PARTIAL_CHAIN |
  59         CERT_TRUST_IS_NOT_SIGNATURE_VALID |
  60         CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
  61
  62     TRACE("verifying %s\n", debugstr_w(conn->server->name));
  63
  64     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
  65     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
  66     if (!(ret = CertGetCertificateChain(NULL, cert, NULL, store, &chainPara, 0, NULL, &chain))) {
  67         TRACE("failed\n");
  68         return GetLastError();
  69     }
  70
  71     errors = chain->TrustStatus.dwErrorStatus;
  72
  73     do {
  74         /* This seems strange, but that's what tests show */
  75         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
  76             WARN("ERROR_INTERNET_SEC_CERT_REV_FAILED\n");
  77             err = ERROR_INTERNET_SEC_CERT_REV_FAILED;
  78             if(conn->mask_errors)
  79                 conn->security_flags |= _SECURITY_FLAG_CERT_REV_FAILED;
  80             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION))
  81                 break;
  82         }
  83
  84         if (chain->TrustStatus.dwErrorStatus & ~supportedErrors) {
  85             WARN("error status %x\n", chain->TrustStatus.dwErrorStatus & ~supportedErrors);
  86             err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
  87             errors &= supportedErrors;
  88             if(!conn->mask_errors)
  89                 break;
  90             WARN("unknown error flags\n");
  91         }
  92
  93         if(errors & CERT_TRUST_IS_NOT_TIME_VALID) {
  94             WARN("CERT_TRUST_IS_NOT_TIME_VALID\n");
  95             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID)) {
  96                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_DATE_INVALID;
  97                 if(!conn->mask_errors)
  98                     break;
  99                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_DATE;
 100             }
 101             errors &= ~CERT_TRUST_IS_NOT_TIME_VALID;
 102         }
 103
 104         if(errors & CERT_TRUST_IS_UNTRUSTED_ROOT) {
 105             WARN("CERT_TRUST_IS_UNTRUSTED_ROOT\n");
 106             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 107                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 108                 if(!conn->mask_errors)
 109                     break;
 110                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 111             }
 112             errors &= ~CERT_TRUST_IS_UNTRUSTED_ROOT;
 113         }
 114
 115         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
 116             WARN("CERT_TRUST_IS_PARTIAL_CHAIN\n");
 117             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 118                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 119                 if(!conn->mask_errors)
 120                     break;
 121                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 122             }
 123             errors &= ~CERT_TRUST_IS_PARTIAL_CHAIN;
 124         }
 125
 126         if(errors & CERT_TRUST_IS_NOT_SIGNATURE_VALID) {
 127             WARN("CERT_TRUST_IS_NOT_SIGNATURE_VALID\n");
 128             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
 129                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
 130                 if(!conn->mask_errors)
 131                     break;
 132                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
 133             }
 134             errors &= ~CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 135         }
 136
 137         if(errors & CERT_TRUST_IS_NOT_VALID_FOR_USAGE) {
 138             WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE\n");
 139             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_WRONG_USAGE)) {
 140                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 141                 if(!conn->mask_errors)
 142                     break;
 143                 WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE, unknown error flags\n");
 144             }
 145             errors &= ~CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
 146         }
 147
 148         if(err == ERROR_INTERNET_SEC_CERT_REV_FAILED) {
 149             assert(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION);
 150             err = ERROR_SUCCESS;
 151         }
 152     }while(0);
 153
 154     if(!err || conn->mask_errors) {
 155         CERT_CHAIN_POLICY_PARA policyPara;
 156         SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
 157         CERT_CHAIN_POLICY_STATUS policyStatus;
 158         CERT_CHAIN_CONTEXT chainCopy;
 159
 160         /* Clear chain->TrustStatus.dwErrorStatus so
 161          * CertVerifyCertificateChainPolicy will verify additional checks
 162          * rather than stopping with an existing, ignored error.
 163          */
 164         memcpy(&chainCopy, chain, sizeof(chainCopy));
 165         chainCopy.TrustStatus.dwErrorStatus = 0;
 166         sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
 167         sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
 168         sslExtraPolicyPara.pwszServerName = conn->server->name;
 169         sslExtraPolicyPara.fdwChecks = conn->security_flags;
 170         policyPara.cbSize = sizeof(policyPara);
 171         policyPara.dwFlags = 0;
 172         policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
 173         ret = CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL,
 174                 &chainCopy, &policyPara, &policyStatus);
 175         /* Any error in the policy status indicates that the
 176          * policy couldn't be verified.
 177          */
 178         if(ret) {
 179             if(policyStatus.dwError == CERT_E_CN_NO_MATCH) {
 180                 WARN("CERT_E_CN_NO_MATCH\n");
 181                 if(conn->mask_errors)
 182                     conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CN;
 183                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_CN_INVALID;
 184             }else if(policyStatus.dwError) {
 185                 WARN("policyStatus.dwError %x\n", policyStatus.dwError);
 186                 if(conn->mask_errors)
 187                     WARN("unknown error flags for policy status %x\n", policyStatus.dwError);
 188                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
 189             }
 190         }else {
 191             err = GetLastError();
 192         }
 193     }
 194
 195     if(err) {
 196         WARN("failed %u\n", err);
 197         CertFreeCertificateChain(chain);
 198         if(conn->server->cert_chain) {
 199             CertFreeCertificateChain(conn->server->cert_chain);
 200             conn->server->cert_chain = NULL;
 201         }
 202         if(conn->mask_errors)
 203             conn->server->security_flags |= conn->security_flags & _SECURITY_ERROR_FLAGS_MASK;
 204         return err;
 205     }
 206
 207     /* FIXME: Reuse cached chain */
 208     if(conn->server->cert_chain)
 209         CertFreeCertificateChain(chain);
 210     else
 211         conn->server->cert_chain = chain;
 212     return ERROR_SUCCESS;
 213 }
 214
 215 static SecHandle cred_handle, compat_cred_handle;
 216 static BOOL cred_handle_initialized, have_compat_cred_handle;
 217
 218 static CRITICAL_SECTION init_sechandle_cs;
 219 static CRITICAL_SECTION_DEBUG init_sechandle_cs_debug = {
 220     0, 0, &init_sechandle_cs,
 221     { &init_sechandle_cs_debug.ProcessLocksList,
 222       &init_sechandle_cs_debug.ProcessLocksList },
 223     0, 0, { (DWORD_PTR)(__FILE__ ": init_sechandle_cs") }
 224 };
 225 static CRITICAL_SECTION init_sechandle_cs = { &init_sechandle_cs_debug, -1, 0, 0, 0, 0 };
 226
 227 static BOOL ensure_cred_handle(void)
 228 {
 229     SECURITY_STATUS res = SEC_E_OK;
 230
 231     EnterCriticalSection(&init_sechandle_cs);
 232
 233     if(!cred_handle_initialized) {
 234         SCHANNEL_CRED cred = {SCHANNEL_CRED_VERSION};
 235         SecPkgCred_SupportedProtocols prots;
 236
 237         res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 238                 NULL, NULL, &cred_handle, NULL);
 239         if(res == SEC_E_OK) {
 240             res = QueryCredentialsAttributesA(&cred_handle, SECPKG_ATTR_SUPPORTED_PROTOCOLS, &prots);
 241             if(res != SEC_E_OK || (prots.grbitProtocol & SP_PROT_TLS1_1PLUS_CLIENT)) {
 242                 cred.grbitEnabledProtocols = prots.grbitProtocol & ~SP_PROT_TLS1_1PLUS_CLIENT;
 243                 res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
 244                        NULL, NULL, &compat_cred_handle, NULL);
 245                 have_compat_cred_handle = res == SEC_E_OK;
 246             }
 247         }
 248
 249         cred_handle_initialized = res == SEC_E_OK;
 250     }
 251
 252     LeaveCriticalSection(&init_sechandle_cs);
 253
 254     if(res != SEC_E_OK) {
 255         WARN("Failed: %08x\n", res);
 256         return FALSE;
 257     }
 258
 259     return TRUE;
 260 }
 261
 262 static BOOL winsock_loaded = FALSE;
 263
 264 static BOOL WINAPI winsock_startup(INIT_ONCE *once, void *param, void **context)
 265 {
 266     WSADATA wsa_data;
 267     DWORD res;
 268
 269     res = WSAStartup(MAKEWORD(1,1), &wsa_data);
 270     if(res == ERROR_SUCCESS)
 271         winsock_loaded = TRUE;
 272     else
 273         ERR("WSAStartup failed: %u\n", res);
 274     return TRUE;
 275 }
 276
 277 void init_winsock(void)
 278 {
 279     static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
 280     InitOnceExecuteOnce(&init_once, winsock_startup, NULL, NULL);
 281 }
 282
 283 static void set_socket_blocking(netconn_t *conn, BOOL is_blocking)
 284 {
 285     if(conn->is_blocking != is_blocking) {
 286         ULONG arg = !is_blocking;
 287         ioctlsocket(conn->socket, FIONBIO, &arg);
 288     }
 289     conn->is_blocking = is_blocking;
 290 }
 291
 292 static DWORD create_netconn_socket(server_t *server, netconn_t *netconn, DWORD timeout)
 293 {
 294     int result;
 295     ULONG flag;
 296     DWORD res;
 297
 298     init_winsock();
 299
 300     assert(server->addr_len);
 301     result = netconn->socket = socket(server->addr.ss_family, SOCK_STREAM, 0);
 302     if(result != -1) {
 303         set_socket_blocking(netconn, FALSE);
 304         result = connect(netconn->socket, (struct sockaddr*)&server->addr, server->addr_len);
 305         if(result == -1)
 306         {
 307             res = WSAGetLastError();
 308             if (res == WSAEINPROGRESS || res == WSAEWOULDBLOCK) {
 309                 FD_SET set;
 310                 int res;
 311                 socklen_t len = sizeof(res);
 312                 TIMEVAL timeout_timeval = {0, timeout*1000};
 313
 314                 FD_ZERO(&set);
 315                 FD_SET(netconn->socket, &set);
 316                 res = select(netconn->socket+1, NULL, &set, NULL, &timeout_timeval);
 317                 if(!res || res == SOCKET_ERROR) {
 318                     closesocket(netconn->socket);
 319                     netconn->socket = -1;
 320                     return ERROR_INTERNET_CANNOT_CONNECT;
 321                 }
 322                 if (!getsockopt(netconn->socket, SOL_SOCKET, SO_ERROR, (void *)&res, &len) && !res)
 323                     result = 0;
 324             }
 325         }
 326         if(result == -1)
 327         {
 328             closesocket(netconn->socket);
 329             netconn->socket = -1;
 330         }
 331     }
 332     if(result == -1)
 333         return ERROR_INTERNET_CANNOT_CONNECT;
 334
 335     flag = 1;
 336     result = setsockopt(netconn->socket, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(flag));
 337     if(result < 0)
 338         WARN("setsockopt(TCP_NODELAY) failed\n");
 339
 340     return ERROR_SUCCESS;
 341 }
 342
 343 DWORD create_netconn(BOOL useSSL, server_t *server, DWORD security_flags, BOOL mask_errors, DWORD timeout, netconn_t **ret)
 344 {
 345     netconn_t *netconn;
 346     int result;
 347
 348     netconn = heap_alloc_zero(sizeof(*netconn));
 349     if(!netconn)
 350         return ERROR_OUTOFMEMORY;
 351
 352     netconn->socket = -1;
 353     netconn->security_flags = security_flags | server->security_flags;
 354     netconn->mask_errors = mask_errors;
 355     list_init(&netconn->pool_entry);
 356     SecInvalidateHandle(&netconn->ssl_ctx);
 357
 358     result = create_netconn_socket(server, netconn, timeout);
 359     if (result != ERROR_SUCCESS) {
 360         heap_free(netconn);
 361         return result;
 362     }
 363
 364     server_addref(server);
 365     netconn->server = server;
 366     *ret = netconn;
 367     return result;
 368 }
 369
 370 BOOL is_valid_netconn(netconn_t *netconn)
 371 {
 372     return netconn && netconn->socket != -1;
 373 }
 374
 375 void close_netconn(netconn_t *netconn)
 376 {
 377     closesocket(netconn->socket);
 378     netconn->socket = -1;
 379 }
 380
 381 void free_netconn(netconn_t *netconn)
 382 {
 383     server_release(netconn->server);
 384
 385     if (netconn->secure) {
 386         heap_free(netconn->peek_msg_mem);
 387         netconn->peek_msg_mem = NULL;
 388         netconn->peek_msg = NULL;
 389         netconn->peek_len = 0;
 390         heap_free(netconn->ssl_buf);
 391         netconn->ssl_buf = NULL;
 392         heap_free(netconn->extra_buf);
 393         netconn->extra_buf = NULL;
 394         netconn->extra_len = 0;
 395         if (SecIsValidHandle(&netconn->ssl_ctx))
 396             DeleteSecurityContext(&netconn->ssl_ctx);
 397     }
 398
 399     close_netconn(netconn);
 400     heap_free(netconn);
 401 }
 402
 403 void NETCON_unload(void)
 404 {
 405     if(cred_handle_initialized)
 406         FreeCredentialsHandle(&cred_handle);
 407     if(have_compat_cred_handle)
 408         FreeCredentialsHandle(&compat_cred_handle);
 409     DeleteCriticalSection(&init_sechandle_cs);
 410     if(winsock_loaded)
 411         WSACleanup();
 412 }
 413
 414 int sock_send(int fd, const void *msg, size_t len, int flags)
 415 {
 416     int ret;
 417     do
 418     {
 419         ret = send(fd, msg, len, flags);
 420     }
 421     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 422     return ret;
 423 }
 424
 425 int sock_recv(int fd, void *msg, size_t len, int flags)
 426 {
 427     int ret;
 428     do
 429     {
 430         ret = recv(fd, msg, len, flags);
 431     }
 432     while(ret == -1 && WSAGetLastError() == WSAEINTR);
 433     return ret;
 434 }
 435
 436 static DWORD netcon_secure_connect_setup(netconn_t *connection, BOOL compat_mode)
 437 {
 438     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
 439     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
 440     SecHandle *cred = &cred_handle;
 441     BYTE *read_buf;
 442     SIZE_T read_buf_size = 2048;
 443     ULONG attrs = 0;
 444     CtxtHandle ctx;
 445     SSIZE_T size;
 446     int bits;
 447     const CERT_CONTEXT *cert;
 448     SECURITY_STATUS status;
 449     DWORD res = ERROR_SUCCESS;
 450
 451     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
 452         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
 453
 454     if(!ensure_cred_handle())
 455         return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 456
 457     if(compat_mode) {
 458         if(!have_compat_cred_handle)
 459             return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 460         cred = &compat_cred_handle;
 461     }
 462
 463     read_buf = heap_alloc(read_buf_size);
 464     if(!read_buf)
 465         return ERROR_OUTOFMEMORY;
 466
 467     status = InitializeSecurityContextW(cred, NULL, connection->server->name, isc_req_flags, 0, 0, NULL, 0,
 468             &ctx, &out_desc, &attrs, NULL);
 469
 470     assert(status != SEC_E_OK);
 471
 472     set_socket_blocking(connection, TRUE);
 473
 474     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
 475         if(out_buf.cbBuffer) {
 476             assert(status == SEC_I_CONTINUE_NEEDED);
 477
 478             TRACE("sending %u bytes\n", out_buf.cbBuffer);
 479
 480             size = sock_send(connection->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
 481             if(size != out_buf.cbBuffer) {
 482                 ERR("send failed\n");
 483                 status = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 484                 break;
 485             }
 486
 487             FreeContextBuffer(out_buf.pvBuffer);
 488             out_buf.pvBuffer = NULL;
 489             out_buf.cbBuffer = 0;
 490         }
 491
 492         if(status == SEC_I_CONTINUE_NEEDED) {
 493             assert(in_bufs[1].cbBuffer < read_buf_size);
 494
 495             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
 496             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
 497
 498             in_bufs[1].BufferType = SECBUFFER_EMPTY;
 499             in_bufs[1].cbBuffer = 0;
 500             in_bufs[1].pvBuffer = NULL;
 501         }
 502
 503         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
 504         assert(in_bufs[1].BufferType == SECBUFFER_EMPTY);
 505
 506         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
 507             BYTE *new_read_buf;
 508
 509             new_read_buf = heap_realloc(read_buf, read_buf_size + 1024);
 510             if(!new_read_buf) {
 511                 status = E_OUTOFMEMORY;
 512                 break;
 513             }
 514
 515             in_bufs[0].pvBuffer = read_buf = new_read_buf;
 516             read_buf_size += 1024;
 517         }
 518
 519         size = sock_recv(connection->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
 520         if(size < 1) {
 521             WARN("recv error\n");
 522             res = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 523             break;
 524         }
 525
 526         TRACE("recv %lu bytes\n", size);
 527
 528         in_bufs[0].cbBuffer += size;
 529         in_bufs[0].pvBuffer = read_buf;
 530         status = InitializeSecurityContextW(cred, &ctx, connection->server->name,  isc_req_flags, 0, 0, &in_desc,
 531                 0, NULL, &out_desc, &attrs, NULL);
 532         TRACE("InitializeSecurityContext ret %08x\n", status);
 533
 534         if(status == SEC_E_OK) {
 535             if(SecIsValidHandle(&connection->ssl_ctx))
 536                 DeleteSecurityContext(&connection->ssl_ctx);
 537             connection->ssl_ctx = ctx;
 538
 539             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
 540                 FIXME("SECBUFFER_EXTRA not supported\n");
 541
 542             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &connection->ssl_sizes);
 543             if(status != SEC_E_OK) {
 544                 WARN("Could not get sizes\n");
 545                 break;
 546             }
 547
 548             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
 549             if(status == SEC_E_OK) {
 550                 res = netconn_verify_cert(connection, cert, cert->hCertStore);
 551                 CertFreeCertificateContext(cert);
 552                 if(res != ERROR_SUCCESS) {
 553                     WARN("cert verify failed: %u\n", res);
 554                     break;
 555                 }
 556             }else {
 557                 WARN("Could not get cert\n");
 558                 break;
 559             }
 560
 561             connection->ssl_buf = heap_alloc(connection->ssl_sizes.cbHeader + connection->ssl_sizes.cbMaximumMessage
 562                     + connection->ssl_sizes.cbTrailer);
 563             if(!connection->ssl_buf) {
 564                 res = GetLastError();
 565                 break;
 566             }
 567         }
 568     }
 569
 570     heap_free(read_buf);
 571
 572     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
 573         WARN("Failed to establish SSL connection: %08x (%u)\n", status, res);
 574         heap_free(connection->ssl_buf);
 575         connection->ssl_buf = NULL;
 576         return res ? res : ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 577     }
 578
 579     TRACE("established SSL connection\n");
 580     connection->secure = TRUE;
 581     connection->security_flags |= SECURITY_FLAG_SECURE;
 582
 583     bits = NETCON_GetCipherStrength(connection);
 584     if (bits >= 128)
 585         connection->security_flags |= SECURITY_FLAG_STRENGTH_STRONG;
 586     else if (bits >= 56)
 587         connection->security_flags |= SECURITY_FLAG_STRENGTH_MEDIUM;
 588     else
 589         connection->security_flags |= SECURITY_FLAG_STRENGTH_WEAK;
 590
 591     if(connection->mask_errors)
 592         connection->server->security_flags = connection->security_flags;
 593     return ERROR_SUCCESS;
 594 }
 595
 596 /******************************************************************************
 597  * NETCON_secure_connect
 598  * Initiates a secure connection over an existing plaintext connection.
 599  */
 600 DWORD NETCON_secure_connect(netconn_t *connection, server_t *server)
 601 {
 602     DWORD res;
 603
 604     /* can't connect if we are already connected */
 605     if(connection->secure) {
 606         ERR("already connected\n");
 607         return ERROR_INTERNET_CANNOT_CONNECT;
 608     }
 609
 610     if(server != connection->server) {
 611         server_release(connection->server);
 612         server_addref(server);
 613         connection->server = server;
 614     }
 615
 616     /* connect with given TLS options */
 617     res = netcon_secure_connect_setup(connection, FALSE);
 618     if (res == ERROR_SUCCESS)
 619         return res;
 620
 621     /* FIXME: when got version alert and FIN from server */
 622     /* fallback to connect without TLSv1.1/TLSv1.2        */
 623     if (res == ERROR_INTERNET_SECURITY_CHANNEL_ERROR && have_compat_cred_handle)
 624     {
 625         closesocket(connection->socket);
 626         res = create_netconn_socket(connection->server, connection, 500);
 627         if (res != ERROR_SUCCESS)
 628             return res;
 629         res = netcon_secure_connect_setup(connection, TRUE);
 630     }
 631     return res;
 632 }
 633
 634 static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
 635 {
 636     SecBuffer bufs[4] = {
 637         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
 638         {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
 639         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
 640         {0, SECBUFFER_EMPTY, NULL}
 641     };
 642     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 643     SECURITY_STATUS res;
 644
 645     memcpy(bufs[1].pvBuffer, msg, size);
 646     res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
 647     if(res != SEC_E_OK) {
 648         WARN("EncryptMessage failed\n");
 649         return FALSE;
 650     }
 651
 652     if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
 653         WARN("send failed\n");
 654         return FALSE;
 655     }
 656
 657     return TRUE;
 658 }
 659
 660 /******************************************************************************
 661  * NETCON_send
 662  * Basically calls 'send()' unless we should use SSL
 663  * number of chars send is put in *sent
 664  */
 665 DWORD NETCON_send(netconn_t *connection, const void *msg, size_t len, int flags,
 666                 int *sent /* out */)
 667 {
 668     /* send is always blocking. */
 669     set_socket_blocking(connection, TRUE);
 670
 671     if(!connection->secure)
 672     {
 673         *sent = sock_send(connection->socket, msg, len, flags);
 674         return *sent == -1 ? WSAGetLastError() : ERROR_SUCCESS;
 675     }
 676     else
 677     {
 678         const BYTE *ptr = msg;
 679         size_t chunk_size;
 680
 681         *sent = 0;
 682
 683         while(len) {
 684             chunk_size = min(len, connection->ssl_sizes.cbMaximumMessage);
 685             if(!send_ssl_chunk(connection, ptr, chunk_size))
 686                 return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
 687
 688             *sent += chunk_size;
 689             ptr += chunk_size;
 690             len -= chunk_size;
 691         }
 692
 693         return ERROR_SUCCESS;
 694     }
 695 }
 696
 697 static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, BOOL blocking, SIZE_T *ret_size, BOOL *eof)
 698 {
 699     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
 700     SecBuffer bufs[4];
 701     SecBufferDesc buf_desc = {SECBUFFER_VERSION, sizeof(bufs)/sizeof(*bufs), bufs};
 702     SSIZE_T size, buf_len = 0;
 703     int i;
 704     SECURITY_STATUS res;
 705
 706     assert(conn->extra_len < ssl_buf_size);
 707
 708     if(conn->extra_len) {
 709         memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
 710         buf_len = conn->extra_len;
 711         conn->extra_len = 0;
 712         heap_free(conn->extra_buf);
 713         conn->extra_buf = NULL;
 714     }
 715
 716     set_socket_blocking(conn, blocking && !buf_len);
 717     size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 718     if(size < 0) {
 719         if(!buf_len) {
 720             if(WSAGetLastError() == WSAEWOULDBLOCK) {
 721                 TRACE("would block\n");
 722                 return WSAEWOULDBLOCK;
 723             }
 724             WARN("recv failed\n");
 725             return ERROR_INTERNET_CONNECTION_ABORTED;
 726         }
 727     }else {
 728         buf_len += size;
 729     }
 730
 731     if(!buf_len) {
 732         TRACE("EOF\n");
 733         *eof = TRUE;
 734         *ret_size = 0;
 735         return ERROR_SUCCESS;
 736     }
 737
 738     *eof = FALSE;
 739
 740     do {
 741         memset(bufs, 0, sizeof(bufs));
 742         bufs[0].BufferType = SECBUFFER_DATA;
 743         bufs[0].cbBuffer = buf_len;
 744         bufs[0].pvBuffer = conn->ssl_buf;
 745
 746         res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
 747         switch(res) {
 748         case SEC_E_OK:
 749             break;
 750         case SEC_I_CONTEXT_EXPIRED:
 751             TRACE("context expired\n");
 752             *eof = TRUE;
 753             return ERROR_SUCCESS;
 754         case SEC_E_INCOMPLETE_MESSAGE:
 755             assert(buf_len < ssl_buf_size);
 756
 757             set_socket_blocking(conn, blocking);
 758             size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
 759             if(size < 1) {
 760                 if(size < 0 && WSAGetLastError() == WSAEWOULDBLOCK) {
 761                     TRACE("would block\n");
 762
 763                     /* FIXME: Optimize extra_buf usage. */
 764                     conn->extra_buf = heap_alloc(buf_len);
 765                     if(!conn->extra_buf)
 766                         return ERROR_NOT_ENOUGH_MEMORY;
 767
 768                     conn->extra_len = buf_len;
 769                     memcpy(conn->extra_buf, conn->ssl_buf, conn->extra_len);
 770                     return WSAEWOULDBLOCK;
 771                 }
 772
 773                 return ERROR_INTERNET_CONNECTION_ABORTED;
 774             }
 775
 776             buf_len += size;
 777             continue;
 778         default:
 779             WARN("failed: %08x\n", res);
 780             return ERROR_INTERNET_CONNECTION_ABORTED;
 781         }
 782     } while(res != SEC_E_OK);
 783
 784     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 785         if(bufs[i].BufferType == SECBUFFER_DATA) {
 786             size = min(buf_size, bufs[i].cbBuffer);
 787             memcpy(buf, bufs[i].pvBuffer, size);
 788             if(size < bufs[i].cbBuffer) {
 789                 assert(!conn->peek_len);
 790                 conn->peek_msg_mem = conn->peek_msg = heap_alloc(bufs[i].cbBuffer - size);
 791                 if(!conn->peek_msg)
 792                     return ERROR_NOT_ENOUGH_MEMORY;
 793                 conn->peek_len = bufs[i].cbBuffer-size;
 794                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
 795             }
 796
 797             *ret_size = size;
 798         }
 799     }
 800
 801     for(i=0; i < sizeof(bufs)/sizeof(*bufs); i++) {
 802         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
 803             conn->extra_buf = heap_alloc(bufs[i].cbBuffer);
 804             if(!conn->extra_buf)
 805                 return ERROR_NOT_ENOUGH_MEMORY;
 806
 807             conn->extra_len = bufs[i].cbBuffer;
 808             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
 809         }
 810     }
 811
 812     return ERROR_SUCCESS;
 813 }
 814
 815 /******************************************************************************
 816  * NETCON_recv
 817  * Basically calls 'recv()' unless we should use SSL
 818  * number of chars received is put in *recvd
 819  */
 820 DWORD NETCON_recv(netconn_t *connection, void *buf, size_t len, BOOL blocking, int *recvd)
 821 {
 822     *recvd = 0;
 823     if (!len)
 824         return ERROR_SUCCESS;
 825
 826     if (!connection->secure)
 827     {
 828         set_socket_blocking(connection, blocking);
 829         *recvd = sock_recv(connection->socket, buf, len, 0);
 830         return *recvd == -1 ? WSAGetLastError() :  ERROR_SUCCESS;
 831     }
 832     else
 833     {
 834         SIZE_T size = 0;
 835         BOOL eof;
 836         DWORD res;
 837
 838         if(connection->peek_msg) {
 839             size = min(len, connection->peek_len);
 840             memcpy(buf, connection->peek_msg, size);
 841             connection->peek_len -= size;
 842             connection->peek_msg += size;
 843
 844             if(!connection->peek_len) {
 845                 heap_free(connection->peek_msg_mem);
 846                 connection->peek_msg_mem = connection->peek_msg = NULL;
 847             }
 848
 849             *recvd = size;
 850             return ERROR_SUCCESS;
 851         }
 852
 853         do {
 854             res = read_ssl_chunk(connection, (BYTE*)buf, len, blocking, &size, &eof);
 855             if(res != ERROR_SUCCESS) {
 856                 if(res == WSAEWOULDBLOCK) {
 857                     if(size)
 858                         res = ERROR_SUCCESS;
 859                 }else {
 860                     WARN("read_ssl_chunk failed\n");
 861                 }
 862                 break;
 863             }
 864         }while(!size && !eof);
 865
 866         TRACE("received %ld bytes\n", size);
 867         *recvd = size;
 868         return res;
 869     }
 870 }
 871
 872 BOOL NETCON_is_alive(netconn_t *netconn)
 873 {
 874     int len;
 875     char b;
 876
 877     set_socket_blocking(netconn, FALSE);
 878     len = sock_recv(netconn->socket, &b, 1, MSG_PEEK);
 879
 880     return len == 1 || (len == -1 && WSAGetLastError() == WSAEWOULDBLOCK);
 881 }
 882
 883 LPCVOID NETCON_GetCert(netconn_t *connection)
 884 {
 885     const CERT_CONTEXT *ret;
 886     SECURITY_STATUS res;
 887
 888     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
 889     return res == SEC_E_OK ? ret : NULL;
 890 }
 891
 892 int NETCON_GetCipherStrength(netconn_t *connection)
 893 {
 894     SecPkgContext_ConnectionInfo conn_info;
 895     SECURITY_STATUS res;
 896
 897     if (!connection->secure)
 898         return 0;
 899
 900     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
 901     if(res != SEC_E_OK)
 902         WARN("QueryContextAttributesW failed: %08x\n", res);
 903     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
 904 }
 905
 906 DWORD NETCON_set_timeout(netconn_t *connection, BOOL send, DWORD value)
 907 {
 908     int result;
 909
 910     result = setsockopt(connection->socket, SOL_SOCKET,
 911                         send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&value,
 912                         sizeof(value));
 913     if (result == -1)
 914     {
 915         WARN("setsockopt failed\n");
 916         return WSAGetLastError();
 917     }
 918     return ERROR_SUCCESS;
 919 }