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