xref: /reactos/dll/win32/wininet/netconnection.c (revision 5f12c8d7) 
1 #ifdef __REACTOS__
2 #define NONAMELESSUNION
3 #include "precomp.h"
4 #else
5 /*
6  * Wininet - networking layer
7  *
8  * Copyright 2002 TransGaming Technologies Inc.
9  * Copyright 2013 Jacek Caban for CodeWeavers
10  *
11  * David Hammerton
12  *
13  * This library is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * This library is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with this library; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
26  */
27 
28 #define NONAMELESSUNION
29 
30 #include "ws2tcpip.h"
31 
32 #include <time.h>
33 #include <stdarg.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <stdio.h>
37 #include <assert.h>
38 
39 #include "windef.h"
40 #include "winbase.h"
41 #include "wininet.h"
42 #include "winerror.h"
43 
44 #include "wine/debug.h"
45 #include "internet.h"
46 #endif /* defined(__REACTOS__) */
47 
48 WINE_DEFAULT_DEBUG_CHANNEL(wininet);
49 
netconn_verify_cert(netconn_t * conn,PCCERT_CONTEXT cert,HCERTSTORE store)50 static DWORD netconn_verify_cert(netconn_t *conn, PCCERT_CONTEXT cert, HCERTSTORE store)
51 {
52     BOOL ret;
53     CERT_CHAIN_PARA chainPara = { sizeof(chainPara), { 0 } };
54     PCCERT_CHAIN_CONTEXT chain;
55     char oid_server_auth[] = szOID_PKIX_KP_SERVER_AUTH;
56     char *server_auth[] = { oid_server_auth };
57     DWORD err = ERROR_SUCCESS, errors;
58 
59     static const DWORD supportedErrors =
60         CERT_TRUST_IS_NOT_TIME_VALID |
61         CERT_TRUST_IS_UNTRUSTED_ROOT |
62         CERT_TRUST_IS_PARTIAL_CHAIN |
63         CERT_TRUST_IS_NOT_SIGNATURE_VALID |
64         CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
65 
66     TRACE("verifying %s\n", debugstr_w(conn->server->name));
67 
68     chainPara.RequestedUsage.Usage.cUsageIdentifier = 1;
69     chainPara.RequestedUsage.Usage.rgpszUsageIdentifier = server_auth;
70     if (!(ret = CertGetCertificateChain(NULL, cert, NULL, store, &chainPara, 0, NULL, &chain))) {
71         TRACE("failed\n");
72         return GetLastError();
73     }
74 
75     errors = chain->TrustStatus.dwErrorStatus;
76 
77     do {
78         /* This seems strange, but that's what tests show */
79         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
80             WARN("ERROR_INTERNET_SEC_CERT_REV_FAILED\n");
81             err = ERROR_INTERNET_SEC_CERT_REV_FAILED;
82             if(conn->mask_errors)
83                 conn->security_flags |= _SECURITY_FLAG_CERT_REV_FAILED;
84             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION))
85                 break;
86         }
87 
88         if (chain->TrustStatus.dwErrorStatus & ~supportedErrors) {
89             WARN("error status %x\n", chain->TrustStatus.dwErrorStatus & ~supportedErrors);
90             err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
91             errors &= supportedErrors;
92             if(!conn->mask_errors)
93                 break;
94             WARN("unknown error flags\n");
95         }
96 
97         if(errors & CERT_TRUST_IS_NOT_TIME_VALID) {
98             WARN("CERT_TRUST_IS_NOT_TIME_VALID\n");
99             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_CERT_DATE_INVALID)) {
100                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_DATE_INVALID;
101                 if(!conn->mask_errors)
102                     break;
103                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_DATE;
104             }
105             errors &= ~CERT_TRUST_IS_NOT_TIME_VALID;
106         }
107 
108         if(errors & CERT_TRUST_IS_UNTRUSTED_ROOT) {
109             WARN("CERT_TRUST_IS_UNTRUSTED_ROOT\n");
110             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
111                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
112                 if(!conn->mask_errors)
113                     break;
114                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
115             }
116             errors &= ~CERT_TRUST_IS_UNTRUSTED_ROOT;
117         }
118 
119         if(errors & CERT_TRUST_IS_PARTIAL_CHAIN) {
120             WARN("CERT_TRUST_IS_PARTIAL_CHAIN\n");
121             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
122                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
123                 if(!conn->mask_errors)
124                     break;
125                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
126             }
127             errors &= ~CERT_TRUST_IS_PARTIAL_CHAIN;
128         }
129 
130         if(errors & CERT_TRUST_IS_NOT_SIGNATURE_VALID) {
131             WARN("CERT_TRUST_IS_NOT_SIGNATURE_VALID\n");
132             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_UNKNOWN_CA)) {
133                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_INVALID_CA;
134                 if(!conn->mask_errors)
135                     break;
136                 conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CA;
137             }
138             errors &= ~CERT_TRUST_IS_NOT_SIGNATURE_VALID;
139         }
140 
141         if(errors & CERT_TRUST_IS_NOT_VALID_FOR_USAGE) {
142             WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE\n");
143             if(!(conn->security_flags & SECURITY_FLAG_IGNORE_WRONG_USAGE)) {
144                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
145                 if(!conn->mask_errors)
146                     break;
147                 WARN("CERT_TRUST_IS_NOT_VALID_FOR_USAGE, unknown error flags\n");
148             }
149             errors &= ~CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
150         }
151 
152         if(err == ERROR_INTERNET_SEC_CERT_REV_FAILED) {
153             assert(conn->security_flags & SECURITY_FLAG_IGNORE_REVOCATION);
154             err = ERROR_SUCCESS;
155         }
156     }while(0);
157 
158     if(!err || conn->mask_errors) {
159         CERT_CHAIN_POLICY_PARA policyPara;
160         SSL_EXTRA_CERT_CHAIN_POLICY_PARA sslExtraPolicyPara;
161         CERT_CHAIN_POLICY_STATUS policyStatus;
162         CERT_CHAIN_CONTEXT chainCopy;
163 
164         /* Clear chain->TrustStatus.dwErrorStatus so
165          * CertVerifyCertificateChainPolicy will verify additional checks
166          * rather than stopping with an existing, ignored error.
167          */
168         memcpy(&chainCopy, chain, sizeof(chainCopy));
169         chainCopy.TrustStatus.dwErrorStatus = 0;
170         sslExtraPolicyPara.u.cbSize = sizeof(sslExtraPolicyPara);
171         sslExtraPolicyPara.dwAuthType = AUTHTYPE_SERVER;
172         sslExtraPolicyPara.pwszServerName = conn->server->name;
173         sslExtraPolicyPara.fdwChecks = conn->security_flags;
174         policyPara.cbSize = sizeof(policyPara);
175         policyPara.dwFlags = 0;
176         policyPara.pvExtraPolicyPara = &sslExtraPolicyPara;
177         ret = CertVerifyCertificateChainPolicy(CERT_CHAIN_POLICY_SSL,
178                 &chainCopy, &policyPara, &policyStatus);
179         /* Any error in the policy status indicates that the
180          * policy couldn't be verified.
181          */
182         if(ret) {
183             if(policyStatus.dwError == CERT_E_CN_NO_MATCH) {
184                 WARN("CERT_E_CN_NO_MATCH\n");
185                 if(conn->mask_errors)
186                     conn->security_flags |= _SECURITY_FLAG_CERT_INVALID_CN;
187                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_CERT_CN_INVALID;
188             }else if(policyStatus.dwError) {
189                 WARN("policyStatus.dwError %x\n", policyStatus.dwError);
190                 if(conn->mask_errors)
191                     WARN("unknown error flags for policy status %x\n", policyStatus.dwError);
192                 err = conn->mask_errors && err ? ERROR_INTERNET_SEC_CERT_ERRORS : ERROR_INTERNET_SEC_INVALID_CERT;
193             }
194         }else {
195             err = GetLastError();
196         }
197     }
198 
199     if(err) {
200         WARN("failed %u\n", err);
201         CertFreeCertificateChain(chain);
202         if(conn->server->cert_chain) {
203             CertFreeCertificateChain(conn->server->cert_chain);
204             conn->server->cert_chain = NULL;
205         }
206         if(conn->mask_errors)
207             conn->server->security_flags |= conn->security_flags & _SECURITY_ERROR_FLAGS_MASK;
208         return err;
209     }
210 
211     /* FIXME: Reuse cached chain */
212     if(conn->server->cert_chain)
213         CertFreeCertificateChain(chain);
214     else
215         conn->server->cert_chain = chain;
216     return ERROR_SUCCESS;
217 }
218 
219 static SecHandle cred_handle, compat_cred_handle;
220 static BOOL cred_handle_initialized, have_compat_cred_handle;
221 
222 static CRITICAL_SECTION init_sechandle_cs;
223 static CRITICAL_SECTION_DEBUG init_sechandle_cs_debug = {
224     0, 0, &init_sechandle_cs,
225     { &init_sechandle_cs_debug.ProcessLocksList,
226       &init_sechandle_cs_debug.ProcessLocksList },
227     0, 0, { (DWORD_PTR)(__FILE__ ": init_sechandle_cs") }
228 };
229 static CRITICAL_SECTION init_sechandle_cs = { &init_sechandle_cs_debug, -1, 0, 0, 0, 0 };
230 
ensure_cred_handle(void)231 static BOOL ensure_cred_handle(void)
232 {
233     SECURITY_STATUS res = SEC_E_OK;
234 
235     EnterCriticalSection(&init_sechandle_cs);
236 
237     if(!cred_handle_initialized) {
238         SCHANNEL_CRED cred = {SCHANNEL_CRED_VERSION};
239         SecPkgCred_SupportedProtocols prots;
240 
241         res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
242                 NULL, NULL, &cred_handle, NULL);
243         if(res == SEC_E_OK) {
244             res = QueryCredentialsAttributesA(&cred_handle, SECPKG_ATTR_SUPPORTED_PROTOCOLS, &prots);
245             if(res != SEC_E_OK || (prots.grbitProtocol & SP_PROT_TLS1_1PLUS_CLIENT)) {
246                 cred.grbitEnabledProtocols = prots.grbitProtocol & ~SP_PROT_TLS1_1PLUS_CLIENT;
247                 res = AcquireCredentialsHandleW(NULL, (WCHAR*)UNISP_NAME_W, SECPKG_CRED_OUTBOUND, NULL, &cred,
248                        NULL, NULL, &compat_cred_handle, NULL);
249                 have_compat_cred_handle = res == SEC_E_OK;
250             }
251         }
252 
253         cred_handle_initialized = res == SEC_E_OK;
254     }
255 
256     LeaveCriticalSection(&init_sechandle_cs);
257 
258     if(res != SEC_E_OK) {
259         WARN("Failed: %08x\n", res);
260         return FALSE;
261     }
262 
263     return TRUE;
264 }
265 
266 static BOOL winsock_loaded = FALSE;
267 
winsock_startup(INIT_ONCE * once,void * param,void ** context)268 static BOOL WINAPI winsock_startup(INIT_ONCE *once, void *param, void **context)
269 {
270     WSADATA wsa_data;
271     DWORD res;
272 
273     res = WSAStartup(MAKEWORD(2,2), &wsa_data);
274     if(res == ERROR_SUCCESS)
275         winsock_loaded = TRUE;
276     else
277         ERR("WSAStartup failed: %u\n", res);
278     return TRUE;
279 }
280 
init_winsock(void)281 void init_winsock(void)
282 {
283     static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
284     InitOnceExecuteOnce(&init_once, winsock_startup, NULL, NULL);
285 }
286 
set_socket_blocking(netconn_t * conn,BOOL is_blocking)287 static void set_socket_blocking(netconn_t *conn, BOOL is_blocking)
288 {
289     if(conn->is_blocking != is_blocking) {
290         ULONG arg = !is_blocking;
291         ioctlsocket(conn->socket, FIONBIO, &arg);
292     }
293     conn->is_blocking = is_blocking;
294 }
295 
create_netconn_socket(server_t * server,netconn_t * netconn,DWORD timeout)296 static DWORD create_netconn_socket(server_t *server, netconn_t *netconn, DWORD timeout)
297 {
298     int result;
299     ULONG flag;
300     DWORD res;
301 
302     init_winsock();
303 
304     assert(server->addr_len);
305     result = netconn->socket = socket(server->addr.ss_family, SOCK_STREAM, 0);
306     if(result != -1) {
307         set_socket_blocking(netconn, FALSE);
308         result = connect(netconn->socket, (struct sockaddr*)&server->addr, server->addr_len);
309         if(result == -1)
310         {
311             res = WSAGetLastError();
312             if (res == WSAEINPROGRESS || res == WSAEWOULDBLOCK) {
313                 FD_SET set;
314                 int res;
315                 socklen_t len = sizeof(res);
316                 TIMEVAL timeout_timeval = {0, timeout*1000};
317 
318                 FD_ZERO(&set);
319                 FD_SET(netconn->socket, &set);
320                 res = select(netconn->socket+1, NULL, &set, NULL, &timeout_timeval);
321                 if(!res || res == SOCKET_ERROR) {
322                     closesocket(netconn->socket);
323                     netconn->socket = -1;
324                     return ERROR_INTERNET_CANNOT_CONNECT;
325                 }
326                 if (!getsockopt(netconn->socket, SOL_SOCKET, SO_ERROR, (void *)&res, &len) && !res)
327                     result = 0;
328             }
329         }
330         if(result == -1)
331         {
332             closesocket(netconn->socket);
333             netconn->socket = -1;
334         }
335     }
336     if(result == -1)
337         return ERROR_INTERNET_CANNOT_CONNECT;
338 
339     flag = 1;
340     result = setsockopt(netconn->socket, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(flag));
341     if(result < 0)
342         WARN("setsockopt(TCP_NODELAY) failed\n");
343 
344     return ERROR_SUCCESS;
345 }
346 
create_netconn(server_t * server,DWORD security_flags,BOOL mask_errors,DWORD timeout,netconn_t ** ret)347 DWORD create_netconn(server_t *server, DWORD security_flags, BOOL mask_errors, DWORD timeout, netconn_t **ret)
348 {
349     netconn_t *netconn;
350     int result;
351 
352     netconn = heap_alloc_zero(sizeof(*netconn));
353     if(!netconn)
354         return ERROR_OUTOFMEMORY;
355 
356     netconn->socket = -1;
357     netconn->security_flags = security_flags | server->security_flags;
358     netconn->mask_errors = mask_errors;
359     list_init(&netconn->pool_entry);
360     SecInvalidateHandle(&netconn->ssl_ctx);
361 
362     result = create_netconn_socket(server, netconn, timeout);
363     if (result != ERROR_SUCCESS) {
364         heap_free(netconn);
365         return result;
366     }
367 
368     server_addref(server);
369     netconn->server = server;
370     *ret = netconn;
371     return result;
372 }
373 
is_valid_netconn(netconn_t * netconn)374 BOOL is_valid_netconn(netconn_t *netconn)
375 {
376     return netconn && netconn->socket != -1;
377 }
378 
close_netconn(netconn_t * netconn)379 void close_netconn(netconn_t *netconn)
380 {
381     closesocket(netconn->socket);
382     netconn->socket = -1;
383 }
384 
free_netconn(netconn_t * netconn)385 void free_netconn(netconn_t *netconn)
386 {
387     server_release(netconn->server);
388 
389     if (netconn->secure) {
390         heap_free(netconn->peek_msg_mem);
391         netconn->peek_msg_mem = NULL;
392         netconn->peek_msg = NULL;
393         netconn->peek_len = 0;
394         heap_free(netconn->ssl_buf);
395         netconn->ssl_buf = NULL;
396         heap_free(netconn->extra_buf);
397         netconn->extra_buf = NULL;
398         netconn->extra_len = 0;
399     }
400     if (SecIsValidHandle(&netconn->ssl_ctx))
401         DeleteSecurityContext(&netconn->ssl_ctx);
402 
403     close_netconn(netconn);
404     heap_free(netconn);
405 }
406 
NETCON_unload(void)407 void NETCON_unload(void)
408 {
409     if(cred_handle_initialized)
410         FreeCredentialsHandle(&cred_handle);
411     if(have_compat_cred_handle)
412         FreeCredentialsHandle(&compat_cred_handle);
413     DeleteCriticalSection(&init_sechandle_cs);
414     if(winsock_loaded)
415         WSACleanup();
416 }
417 
sock_send(int fd,const void * msg,size_t len,int flags)418 int sock_send(int fd, const void *msg, size_t len, int flags)
419 {
420     int ret;
421     do
422     {
423         ret = send(fd, msg, len, flags);
424     }
425     while(ret == -1 && WSAGetLastError() == WSAEINTR);
426     return ret;
427 }
428 
sock_recv(int fd,void * msg,size_t len,int flags)429 int sock_recv(int fd, void *msg, size_t len, int flags)
430 {
431     int ret;
432     do
433     {
434         ret = recv(fd, msg, len, flags);
435     }
436     while(ret == -1 && WSAGetLastError() == WSAEINTR);
437     return ret;
438 }
439 
netcon_secure_connect_setup(netconn_t * connection,BOOL compat_mode)440 static DWORD netcon_secure_connect_setup(netconn_t *connection, BOOL compat_mode)
441 {
442     SecBuffer out_buf = {0, SECBUFFER_TOKEN, NULL}, in_bufs[2] = {{0, SECBUFFER_TOKEN}, {0, SECBUFFER_EMPTY}};
443     SecBufferDesc out_desc = {SECBUFFER_VERSION, 1, &out_buf}, in_desc = {SECBUFFER_VERSION, 2, in_bufs};
444     SecHandle *cred = &cred_handle;
445     BYTE *read_buf;
446     SIZE_T read_buf_size = 2048;
447     ULONG attrs = 0;
448     CtxtHandle ctx;
449     SSIZE_T size;
450     int bits;
451     const CERT_CONTEXT *cert;
452     SECURITY_STATUS status;
453     DWORD res = ERROR_SUCCESS;
454 
455     const DWORD isc_req_flags = ISC_REQ_ALLOCATE_MEMORY|ISC_REQ_USE_SESSION_KEY|ISC_REQ_CONFIDENTIALITY
456         |ISC_REQ_SEQUENCE_DETECT|ISC_REQ_REPLAY_DETECT|ISC_REQ_MANUAL_CRED_VALIDATION;
457 
458     if(!ensure_cred_handle())
459         return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
460 
461     if(compat_mode) {
462         if(!have_compat_cred_handle)
463             return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
464         cred = &compat_cred_handle;
465     }
466 
467     read_buf = heap_alloc(read_buf_size);
468     if(!read_buf)
469         return ERROR_OUTOFMEMORY;
470 
471     status = InitializeSecurityContextW(cred, NULL, connection->server->name, isc_req_flags, 0, 0, NULL, 0,
472             &ctx, &out_desc, &attrs, NULL);
473 
474     assert(status != SEC_E_OK);
475 
476     set_socket_blocking(connection, TRUE);
477 
478     while(status == SEC_I_CONTINUE_NEEDED || status == SEC_E_INCOMPLETE_MESSAGE) {
479         if(out_buf.cbBuffer) {
480             assert(status == SEC_I_CONTINUE_NEEDED);
481 
482             TRACE("sending %u bytes\n", out_buf.cbBuffer);
483 
484             size = sock_send(connection->socket, out_buf.pvBuffer, out_buf.cbBuffer, 0);
485             if(size != out_buf.cbBuffer) {
486                 ERR("send failed\n");
487                 status = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
488                 break;
489             }
490 
491             FreeContextBuffer(out_buf.pvBuffer);
492             out_buf.pvBuffer = NULL;
493             out_buf.cbBuffer = 0;
494         }
495 
496         if(status == SEC_I_CONTINUE_NEEDED) {
497             assert(in_bufs[1].cbBuffer < read_buf_size);
498 
499             memmove(read_buf, (BYTE*)in_bufs[0].pvBuffer+in_bufs[0].cbBuffer-in_bufs[1].cbBuffer, in_bufs[1].cbBuffer);
500             in_bufs[0].cbBuffer = in_bufs[1].cbBuffer;
501 
502             in_bufs[1].BufferType = SECBUFFER_EMPTY;
503             in_bufs[1].cbBuffer = 0;
504             in_bufs[1].pvBuffer = NULL;
505         }
506 
507         assert(in_bufs[0].BufferType == SECBUFFER_TOKEN);
508         assert(in_bufs[1].BufferType == SECBUFFER_EMPTY);
509 
510         if(in_bufs[0].cbBuffer + 1024 > read_buf_size) {
511             BYTE *new_read_buf;
512 
513             new_read_buf = heap_realloc(read_buf, read_buf_size + 1024);
514             if(!new_read_buf) {
515                 status = E_OUTOFMEMORY;
516                 break;
517             }
518 
519             in_bufs[0].pvBuffer = read_buf = new_read_buf;
520             read_buf_size += 1024;
521         }
522 
523         size = sock_recv(connection->socket, read_buf+in_bufs[0].cbBuffer, read_buf_size-in_bufs[0].cbBuffer, 0);
524         if(size < 1) {
525             WARN("recv error\n");
526             res = ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
527             break;
528         }
529 
530         TRACE("recv %lu bytes\n", size);
531 
532         in_bufs[0].cbBuffer += size;
533         in_bufs[0].pvBuffer = read_buf;
534         status = InitializeSecurityContextW(cred, &ctx, connection->server->name,  isc_req_flags, 0, 0, &in_desc,
535                 0, NULL, &out_desc, &attrs, NULL);
536         TRACE("InitializeSecurityContext ret %08x\n", status);
537 
538         if(status == SEC_E_OK) {
539             if(SecIsValidHandle(&connection->ssl_ctx))
540                 DeleteSecurityContext(&connection->ssl_ctx);
541             connection->ssl_ctx = ctx;
542 
543             if(in_bufs[1].BufferType == SECBUFFER_EXTRA)
544                 FIXME("SECBUFFER_EXTRA not supported\n");
545 
546             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_STREAM_SIZES, &connection->ssl_sizes);
547             if(status != SEC_E_OK) {
548                 WARN("Could not get sizes\n");
549                 break;
550             }
551 
552             status = QueryContextAttributesW(&ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&cert);
553             if(status == SEC_E_OK) {
554                 res = netconn_verify_cert(connection, cert, cert->hCertStore);
555                 CertFreeCertificateContext(cert);
556                 if(res != ERROR_SUCCESS) {
557                     WARN("cert verify failed: %u\n", res);
558                     break;
559                 }
560             }else {
561                 WARN("Could not get cert\n");
562                 break;
563             }
564 
565             connection->ssl_buf = heap_alloc(connection->ssl_sizes.cbHeader + connection->ssl_sizes.cbMaximumMessage
566                     + connection->ssl_sizes.cbTrailer);
567             if(!connection->ssl_buf) {
568                 res = GetLastError();
569                 break;
570             }
571         }
572     }
573 
574     heap_free(read_buf);
575 
576     if(status != SEC_E_OK || res != ERROR_SUCCESS) {
577         WARN("Failed to establish SSL connection: %08x (%u)\n", status, res);
578         heap_free(connection->ssl_buf);
579         connection->ssl_buf = NULL;
580         return res ? res : ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
581     }
582 
583     TRACE("established SSL connection\n");
584     connection->secure = TRUE;
585     connection->security_flags |= SECURITY_FLAG_SECURE;
586 
587     bits = NETCON_GetCipherStrength(connection);
588     if (bits >= 128)
589         connection->security_flags |= SECURITY_FLAG_STRENGTH_STRONG;
590     else if (bits >= 56)
591         connection->security_flags |= SECURITY_FLAG_STRENGTH_MEDIUM;
592     else
593         connection->security_flags |= SECURITY_FLAG_STRENGTH_WEAK;
594 
595     if(connection->mask_errors)
596         connection->server->security_flags = connection->security_flags;
597     return ERROR_SUCCESS;
598 }
599 
600 /******************************************************************************
601  * NETCON_secure_connect
602  * Initiates a secure connection over an existing plaintext connection.
603  */
NETCON_secure_connect(netconn_t * connection,server_t * server)604 DWORD NETCON_secure_connect(netconn_t *connection, server_t *server)
605 {
606     DWORD res;
607 
608     /* can't connect if we are already connected */
609     if(connection->secure) {
610         ERR("already connected\n");
611         return ERROR_INTERNET_CANNOT_CONNECT;
612     }
613 
614     if(server != connection->server) {
615         server_release(connection->server);
616         server_addref(server);
617         connection->server = server;
618     }
619 
620     /* connect with given TLS options */
621     res = netcon_secure_connect_setup(connection, FALSE);
622     if (res == ERROR_SUCCESS)
623         return res;
624 
625     /* FIXME: when got version alert and FIN from server */
626     /* fallback to connect without TLSv1.1/TLSv1.2        */
627     if (res == ERROR_INTERNET_SECURITY_CHANNEL_ERROR && have_compat_cred_handle)
628     {
629         closesocket(connection->socket);
630         res = create_netconn_socket(connection->server, connection, 500);
631         if (res != ERROR_SUCCESS)
632             return res;
633         res = netcon_secure_connect_setup(connection, TRUE);
634     }
635     return res;
636 }
637 
send_ssl_chunk(netconn_t * conn,const void * msg,size_t size)638 static BOOL send_ssl_chunk(netconn_t *conn, const void *msg, size_t size)
639 {
640     SecBuffer bufs[4] = {
641         {conn->ssl_sizes.cbHeader, SECBUFFER_STREAM_HEADER, conn->ssl_buf},
642         {size,  SECBUFFER_DATA, conn->ssl_buf+conn->ssl_sizes.cbHeader},
643         {conn->ssl_sizes.cbTrailer, SECBUFFER_STREAM_TRAILER, conn->ssl_buf+conn->ssl_sizes.cbHeader+size},
644         {0, SECBUFFER_EMPTY, NULL}
645     };
646     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
647     SECURITY_STATUS res;
648 
649     memcpy(bufs[1].pvBuffer, msg, size);
650     res = EncryptMessage(&conn->ssl_ctx, 0, &buf_desc, 0);
651     if(res != SEC_E_OK) {
652         WARN("EncryptMessage failed\n");
653         return FALSE;
654     }
655 
656     if(sock_send(conn->socket, conn->ssl_buf, bufs[0].cbBuffer+bufs[1].cbBuffer+bufs[2].cbBuffer, 0) < 1) {
657         WARN("send failed\n");
658         return FALSE;
659     }
660 
661     return TRUE;
662 }
663 
664 /******************************************************************************
665  * NETCON_send
666  * Basically calls 'send()' unless we should use SSL
667  * number of chars send is put in *sent
668  */
NETCON_send(netconn_t * connection,const void * msg,size_t len,int flags,int * sent)669 DWORD NETCON_send(netconn_t *connection, const void *msg, size_t len, int flags,
670 		int *sent /* out */)
671 {
672     /* send is always blocking. */
673     set_socket_blocking(connection, TRUE);
674 
675     if(!connection->secure)
676     {
677 	*sent = sock_send(connection->socket, msg, len, flags);
678         return *sent == -1 ? WSAGetLastError() : ERROR_SUCCESS;
679     }
680     else
681     {
682         const BYTE *ptr = msg;
683         size_t chunk_size;
684 
685         *sent = 0;
686 
687         while(len) {
688             chunk_size = min(len, connection->ssl_sizes.cbMaximumMessage);
689             if(!send_ssl_chunk(connection, ptr, chunk_size))
690                 return ERROR_INTERNET_SECURITY_CHANNEL_ERROR;
691 
692             *sent += chunk_size;
693             ptr += chunk_size;
694             len -= chunk_size;
695         }
696 
697         return ERROR_SUCCESS;
698     }
699 }
700 
read_ssl_chunk(netconn_t * conn,void * buf,SIZE_T buf_size,BOOL blocking,SIZE_T * ret_size,BOOL * eof)701 static BOOL read_ssl_chunk(netconn_t *conn, void *buf, SIZE_T buf_size, BOOL blocking, SIZE_T *ret_size, BOOL *eof)
702 {
703     const SIZE_T ssl_buf_size = conn->ssl_sizes.cbHeader+conn->ssl_sizes.cbMaximumMessage+conn->ssl_sizes.cbTrailer;
704     SecBuffer bufs[4];
705     SecBufferDesc buf_desc = {SECBUFFER_VERSION, ARRAY_SIZE(bufs), bufs};
706     SSIZE_T size, buf_len = 0;
707     int i;
708     SECURITY_STATUS res;
709 
710     assert(conn->extra_len < ssl_buf_size);
711 
712     if(conn->extra_len) {
713         memcpy(conn->ssl_buf, conn->extra_buf, conn->extra_len);
714         buf_len = conn->extra_len;
715         conn->extra_len = 0;
716         heap_free(conn->extra_buf);
717         conn->extra_buf = NULL;
718     }
719 
720     set_socket_blocking(conn, blocking && !buf_len);
721     size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
722     if(size < 0) {
723         if(!buf_len) {
724             if(WSAGetLastError() == WSAEWOULDBLOCK) {
725                 TRACE("would block\n");
726                 return WSAEWOULDBLOCK;
727             }
728             WARN("recv failed\n");
729             return ERROR_INTERNET_CONNECTION_ABORTED;
730         }
731     }else {
732         buf_len += size;
733     }
734 
735     if(!buf_len) {
736         TRACE("EOF\n");
737         *eof = TRUE;
738         *ret_size = 0;
739         return ERROR_SUCCESS;
740     }
741 
742     *eof = FALSE;
743 
744     do {
745         memset(bufs, 0, sizeof(bufs));
746         bufs[0].BufferType = SECBUFFER_DATA;
747         bufs[0].cbBuffer = buf_len;
748         bufs[0].pvBuffer = conn->ssl_buf;
749 
750         res = DecryptMessage(&conn->ssl_ctx, &buf_desc, 0, NULL);
751         switch(res) {
752         case SEC_E_OK:
753             break;
754         case SEC_I_CONTEXT_EXPIRED:
755             TRACE("context expired\n");
756             *eof = TRUE;
757             return ERROR_SUCCESS;
758         case SEC_E_INCOMPLETE_MESSAGE:
759             assert(buf_len < ssl_buf_size);
760 
761             set_socket_blocking(conn, blocking);
762             size = sock_recv(conn->socket, conn->ssl_buf+buf_len, ssl_buf_size-buf_len, 0);
763             if(size < 1) {
764                 if(size < 0 && WSAGetLastError() == WSAEWOULDBLOCK) {
765                     TRACE("would block\n");
766 
767                     /* FIXME: Optimize extra_buf usage. */
768                     conn->extra_buf = heap_alloc(buf_len);
769                     if(!conn->extra_buf)
770                         return ERROR_NOT_ENOUGH_MEMORY;
771 
772                     conn->extra_len = buf_len;
773                     memcpy(conn->extra_buf, conn->ssl_buf, conn->extra_len);
774                     return WSAEWOULDBLOCK;
775                 }
776 
777                 return ERROR_INTERNET_CONNECTION_ABORTED;
778             }
779 
780             buf_len += size;
781             continue;
782         default:
783             WARN("failed: %08x\n", res);
784             return ERROR_INTERNET_CONNECTION_ABORTED;
785         }
786     } while(res != SEC_E_OK);
787 
788     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
789         if(bufs[i].BufferType == SECBUFFER_DATA) {
790             size = min(buf_size, bufs[i].cbBuffer);
791             memcpy(buf, bufs[i].pvBuffer, size);
792             if(size < bufs[i].cbBuffer) {
793                 assert(!conn->peek_len);
794                 conn->peek_msg_mem = conn->peek_msg = heap_alloc(bufs[i].cbBuffer - size);
795                 if(!conn->peek_msg)
796                     return ERROR_NOT_ENOUGH_MEMORY;
797                 conn->peek_len = bufs[i].cbBuffer-size;
798                 memcpy(conn->peek_msg, (char*)bufs[i].pvBuffer+size, conn->peek_len);
799             }
800 
801             *ret_size = size;
802         }
803     }
804 
805     for(i = 0; i < ARRAY_SIZE(bufs); i++) {
806         if(bufs[i].BufferType == SECBUFFER_EXTRA) {
807             conn->extra_buf = heap_alloc(bufs[i].cbBuffer);
808             if(!conn->extra_buf)
809                 return ERROR_NOT_ENOUGH_MEMORY;
810 
811             conn->extra_len = bufs[i].cbBuffer;
812             memcpy(conn->extra_buf, bufs[i].pvBuffer, conn->extra_len);
813         }
814     }
815 
816     return ERROR_SUCCESS;
817 }
818 
819 /******************************************************************************
820  * NETCON_recv
821  * Basically calls 'recv()' unless we should use SSL
822  * number of chars received is put in *recvd
823  */
NETCON_recv(netconn_t * connection,void * buf,size_t len,BOOL blocking,int * recvd)824 DWORD NETCON_recv(netconn_t *connection, void *buf, size_t len, BOOL blocking, int *recvd)
825 {
826     *recvd = 0;
827     if (!len)
828         return ERROR_SUCCESS;
829 
830     if (!connection->secure)
831     {
832         set_socket_blocking(connection, blocking);
833         *recvd = sock_recv(connection->socket, buf, len, 0);
834         return *recvd == -1 ? WSAGetLastError() :  ERROR_SUCCESS;
835     }
836     else
837     {
838         SIZE_T size = 0;
839         BOOL eof;
840         DWORD res;
841 
842         if(connection->peek_msg) {
843             size = min(len, connection->peek_len);
844             memcpy(buf, connection->peek_msg, size);
845             connection->peek_len -= size;
846             connection->peek_msg += size;
847 
848             if(!connection->peek_len) {
849                 heap_free(connection->peek_msg_mem);
850                 connection->peek_msg_mem = connection->peek_msg = NULL;
851             }
852 
853             *recvd = size;
854             return ERROR_SUCCESS;
855         }
856 
857         do {
858             res = read_ssl_chunk(connection, (BYTE*)buf, len, blocking, &size, &eof);
859             if(res != ERROR_SUCCESS) {
860                 if(res == WSAEWOULDBLOCK) {
861                     if(size)
862                         res = ERROR_SUCCESS;
863                 }else {
864                     WARN("read_ssl_chunk failed\n");
865                 }
866                 break;
867             }
868         }while(!size && !eof);
869 
870         TRACE("received %ld bytes\n", size);
871         *recvd = size;
872         return res;
873     }
874 }
875 
NETCON_is_alive(netconn_t * netconn)876 BOOL NETCON_is_alive(netconn_t *netconn)
877 {
878     int len;
879     char b;
880 
881     set_socket_blocking(netconn, FALSE);
882     len = sock_recv(netconn->socket, &b, 1, MSG_PEEK);
883 
884     return len == 1 || (len == -1 && WSAGetLastError() == WSAEWOULDBLOCK);
885 }
886 
NETCON_GetCert(netconn_t * connection)887 LPCVOID NETCON_GetCert(netconn_t *connection)
888 {
889     const CERT_CONTEXT *ret;
890     SECURITY_STATUS res;
891 
892     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_REMOTE_CERT_CONTEXT, (void*)&ret);
893     return res == SEC_E_OK ? ret : NULL;
894 }
895 
NETCON_GetCipherStrength(netconn_t * connection)896 int NETCON_GetCipherStrength(netconn_t *connection)
897 {
898     SecPkgContext_ConnectionInfo conn_info;
899     SECURITY_STATUS res;
900 
901     if (!connection->secure)
902         return 0;
903 
904     res = QueryContextAttributesW(&connection->ssl_ctx, SECPKG_ATTR_CONNECTION_INFO, (void*)&conn_info);
905     if(res != SEC_E_OK)
906         WARN("QueryContextAttributesW failed: %08x\n", res);
907     return res == SEC_E_OK ? conn_info.dwCipherStrength : 0;
908 }
909 
NETCON_set_timeout(netconn_t * connection,BOOL send,DWORD value)910 DWORD NETCON_set_timeout(netconn_t *connection, BOOL send, DWORD value)
911 {
912     int result;
913 
914     result = setsockopt(connection->socket, SOL_SOCKET,
915                         send ? SO_SNDTIMEO : SO_RCVTIMEO, (void*)&value,
916                         sizeof(value));
917     if (result == -1)
918     {
919         WARN("setsockopt failed\n");
920         return WSAGetLastError();
921     }
922     return ERROR_SUCCESS;
923 }
924