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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2012, 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 http://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.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef USE_WINDOWS_SSPI
#include <curl/curl.h>
#include "curl_sspi.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
/* We use our own typedef here since some headers might lack these */
typedef PSecurityFunctionTable (APIENTRY *INITSECURITYINTERFACE_FN)(VOID);
/* See definition of SECURITY_ENTRYPOINT in sspi.h */
#ifdef UNICODE
# ifdef _WIN32_WCE
# define SECURITYENTRYPOINT L"InitSecurityInterfaceW"
# else
# define SECURITYENTRYPOINT "InitSecurityInterfaceW"
# endif
#else
# define SECURITYENTRYPOINT "InitSecurityInterfaceA"
#endif
/* Handle of security.dll or secur32.dll, depending on Windows version */
HMODULE s_hSecDll = NULL;
/* Pointer to SSPI dispatch table */
PSecurityFunctionTable s_pSecFn = NULL;
/*
* Curl_sspi_global_init()
*
* This is used to load the Security Service Provider Interface (SSPI)
* dynamic link library portably across all Windows versions, without
* the need to directly link libcurl, nor the application using it, at
* build time.
*
* Once this function has been executed, Windows SSPI functions can be
* called through the Security Service Provider Interface dispatch table.
*/
CURLcode Curl_sspi_global_init(void)
{
bool securityDll = FALSE;
INITSECURITYINTERFACE_FN pInitSecurityInterface;
/* If security interface is not yet initialized try to do this */
if(!s_hSecDll) {
/* Security Service Provider Interface (SSPI) functions are located in
* security.dll on WinNT 4.0 and in secur32.dll on Win9x. Win2K and XP
* have both these DLLs (security.dll forwards calls to secur32.dll) */
DWORD majorVersion = 4;
DWORD platformId = VER_PLATFORM_WIN32_NT;
#if (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
OSVERSIONINFO osver;
memset(&osver, 0, sizeof(osver));
osver.dwOSVersionInfoSize = sizeof(osver);
/* Find out Windows version */
if(!GetVersionEx(&osver))
return CURLE_FAILED_INIT;
/* Verify the major version number == 4 and platform id == WIN_NT */
if(osver.dwMajorVersion == majorVersion &&
osver.dwPlatformId == platformId)
securityDll = TRUE;
#else
ULONGLONG majorVersionMask;
ULONGLONG platformIdMask;
OSVERSIONINFOEX osver;
memset(&osver, 0, sizeof(osver));
osver.dwOSVersionInfoSize = sizeof(osver);
osver.dwMajorVersion = majorVersion;
osver.dwPlatformId = platformId;
majorVersionMask = VerSetConditionMask(0, VER_MAJORVERSION, VER_EQUAL);
platformIdMask = VerSetConditionMask(0, VER_PLATFORMID, VER_EQUAL);
/* Verify the major version number == 4 and platform id == WIN_NT */
if(VerifyVersionInfo(&osver, VER_MAJORVERSION, majorVersionMask) &&
VerifyVersionInfo(&osver, VER_PLATFORMID, platformIdMask))
securityDll = TRUE;
#endif
/* Load SSPI dll into the address space of the calling process */
if(securityDll)
s_hSecDll = LoadLibrary(TEXT("security.dll"));
else
s_hSecDll = LoadLibrary(TEXT("secur32.dll"));
if(!s_hSecDll)
return CURLE_FAILED_INIT;
/* Get address of the InitSecurityInterfaceA function from the SSPI dll */
pInitSecurityInterface = (INITSECURITYINTERFACE_FN)
GetProcAddress(s_hSecDll, SECURITYENTRYPOINT);
if(!pInitSecurityInterface)
return CURLE_FAILED_INIT;
/* Get pointer to Security Service Provider Interface dispatch table */
s_pSecFn = pInitSecurityInterface();
if(!s_pSecFn)
return CURLE_FAILED_INIT;
}
return CURLE_OK;
}
/*
* Curl_sspi_global_cleanup()
*
* This deinitializes the Security Service Provider Interface from libcurl.
*/
void Curl_sspi_global_cleanup(void)
{
if(s_hSecDll) {
FreeLibrary(s_hSecDll);
s_hSecDll = NULL;
s_pSecFn = NULL;
}
}
#endif /* USE_WINDOWS_SSPI */
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