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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2012 - 2016, Marc Hoersken, <info@marc-hoersken.de>
* Copyright (C) 2012, Mark Salisbury, <mark.salisbury@hp.com>
* Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/*
* Source file for all SChannel-specific code for the TLS/SSL layer. No code
* but vtls.c should ever call or use these functions.
*
*/
/*
* Based upon the PolarSSL implementation in polarssl.c and polarssl.h:
* Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
*
* Based upon the CyaSSL implementation in cyassl.c and cyassl.h:
* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* Thanks for code and inspiration!
*/
#include "curl_setup.h"
#ifdef USE_SCHANNEL
#ifndef USE_WINDOWS_SSPI
# error "Can't compile SCHANNEL support without SSPI."
#endif
#include "curl_sspi.h"
#include "sendf.h"
#include "connect.h" /* for the connect timeout */
#include "strerror.h"
#include "select.h" /* for the socket readyness */
#include "inet_pton.h" /* for IP addr SNI check */
#include "curl_multibyte.h"
#include "system_win32.h"
/* The last #include file should be: */
#include "curl_memory.h"
/* ALPN requires version 8.1 of the Windows SDK, which was
shipped with Visual Studio 2013, aka _MSC_VER 1800:
https://technet.microsoft.com/en-us/library/hh831771%28v=ws.11%29.aspx
*/
#if defined(_MSC_VER) && (_MSC_VER >= 1800) && !defined(_USING_V110_SDK71_)
/* Uncomment to force verbose output
* #define infof(x, y, ...) printf(y, __VA_ARGS__)
* #define failf(x, y, ...) printf(y, __VA_ARGS__)
*/
static Curl_recv schannel_recv;
static Curl_send schannel_send;
#ifdef _WIN32_WCE
static CURLcode verify_certificate(struct connectdata *conn, int sockindex);
#endif
static void InitSecBuffer(SecBuffer *buffer, unsigned long BufType,
void *BufDataPtr, unsigned long BufByteSize)
{
buffer->cbBuffer = BufByteSize;
buffer->BufferType = BufType;
buffer->pvBuffer = BufDataPtr;
}
static void InitSecBufferDesc(SecBufferDesc *desc, SecBuffer *BufArr,
unsigned long NumArrElem)
{
desc->ulVersion = SECBUFFER_VERSION;
desc->pBuffers = BufArr;
desc->cBuffers = NumArrElem;
}
static CURLcode
schannel_connect_step1(struct connectdata *conn, int sockindex)
{
struct Curl_easy *data = conn->data;
struct ssl_connect_data *connssl = &conn->ssl[sockindex];
SecBuffer outbuf;
SecBufferDesc outbuf_desc;
SecBuffer inbuf;
SecBufferDesc inbuf_desc;
#ifdef HAS_ALPN
unsigned char alpn_buffer[128];
#endif
SCHANNEL_CRED schannel_cred;
SECURITY_STATUS sspi_status = SEC_E_OK;
struct curl_schannel_cred *old_cred = NULL;
struct in_addr addr;
#ifdef ENABLE_IPV6
struct in6_addr addr6;
#endif
const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
conn->host.name;
infof(data, "schannel: SSL/TLS connection with %s port %hu (step 1/3)\n",
#ifdef HAS_ALPN
/* ALPN is only supported on Windows 8.1 / Server 2012 R2 and above.
Also it doesn't seem to be supported for Wine, see curl bug #983. */
connssl->use_alpn = conn->bits.tls_enable_alpn &&
!GetProcAddress(GetModuleHandleA("ntdll"),
"wine_get_version") &&
Curl_verify_windows_version(6, 3, PLATFORM_WINNT,
VERSION_GREATER_THAN_EQUAL);
#else
connssl->use_alpn = false;
#endif
connssl->cred = NULL;
/* check for an existing re-usable credential handle */
if(data->set.general_ssl.sessionid) {
Curl_ssl_sessionid_lock(conn);
if(!Curl_ssl_getsessionid(conn, (void **)&old_cred, NULL, sockindex)) {
connssl->cred = old_cred;
infof(data, "schannel: re-using existing credential handle\n");
/* increment the reference counter of the credential/session handle */
connssl->cred->refcount++;
infof(data, "schannel: incremented credential handle refcount = %d\n",
connssl->cred->refcount);
}
Curl_ssl_sessionid_unlock(conn);
if(!connssl->cred) {
/* setup Schannel API options */
memset(&schannel_cred, 0, sizeof(schannel_cred));
schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
if(conn->ssl_config.verifypeer) {
#ifdef _WIN32_WCE
/* certificate validation on CE doesn't seem to work right; we'll
do it following a more manual process. */
schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION |
SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
SCH_CRED_IGNORE_REVOCATION_OFFLINE;
schannel_cred.dwFlags = SCH_CRED_AUTO_CRED_VALIDATION;
/* TODO s/data->set.ssl.no_revoke/SSL_SET_OPTION(no_revoke)/g */
if(data->set.ssl.no_revoke)
schannel_cred.dwFlags |= SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
SCH_CRED_IGNORE_REVOCATION_OFFLINE;
else
schannel_cred.dwFlags |= SCH_CRED_REVOCATION_CHECK_CHAIN;
if(data->set.ssl.no_revoke)
infof(data, "schannel: disabled server certificate revocation "
"checks\n");
else
infof(data, "schannel: checking server certificate revocation\n");
}
else {
schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION |
SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
SCH_CRED_IGNORE_REVOCATION_OFFLINE;
infof(data, "schannel: disabled server certificate revocation checks\n");
if(!conn->ssl_config.verifyhost) {
schannel_cred.dwFlags |= SCH_CRED_NO_SERVERNAME_CHECK;
infof(data, "schannel: verifyhost setting prevents Schannel from "
"comparing the supplied target name with the subject "
"names in server certificates. Also disables SNI.\n");
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