1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifdef USE_WINDOWS_SSPI
27 #include <curl/curl.h>
29 #include "curl_sspi.h"
31 #define _MPRINTF_REPLACE /* use our functions only */
32 #include <curl/mprintf.h>
34 #include "curl_memory.h"
35 /* The last #include file should be: */
38 /* We use our own typedef here since some headers might lack these */
39 typedef PSecurityFunctionTable (APIENTRY *INITSECURITYINTERFACE_FN)(VOID);
41 /* See definition of SECURITY_ENTRYPOINT in sspi.h */
44 # define SECURITYENTRYPOINT L"InitSecurityInterfaceW"
46 # define SECURITYENTRYPOINT "InitSecurityInterfaceW"
49 # define SECURITYENTRYPOINT "InitSecurityInterfaceA"
52 /* Handle of security.dll or secur32.dll, depending on Windows version */
53 HMODULE s_hSecDll = NULL;
55 /* Pointer to SSPI dispatch table */
56 PSecurityFunctionTable s_pSecFn = NULL;
59 * Curl_sspi_global_init()
61 * This is used to load the Security Service Provider Interface (SSPI)
62 * dynamic link library portably across all Windows versions, without
63 * the need to directly link libcurl, nor the application using it, at
66 * Once this function has been executed, Windows SSPI functions can be
67 * called through the Security Service Provider Interface dispatch table.
69 CURLcode Curl_sspi_global_init(void)
72 INITSECURITYINTERFACE_FN pInitSecurityInterface;
74 /* If security interface is not yet initialized try to do this */
77 /* Find out Windows version */
78 memset(&osver, 0, sizeof(osver));
79 osver.dwOSVersionInfoSize = sizeof(osver);
80 if(!GetVersionEx(&osver))
81 return CURLE_FAILED_INIT;
83 /* Security Service Provider Interface (SSPI) functions are located in
84 * security.dll on WinNT 4.0 and in secur32.dll on Win9x. Win2K and XP
85 * have both these DLLs (security.dll forwards calls to secur32.dll) */
87 /* Load SSPI dll into the address space of the calling process */
88 if(osver.dwPlatformId == VER_PLATFORM_WIN32_NT
89 && osver.dwMajorVersion == 4)
90 s_hSecDll = LoadLibrary(TEXT("security.dll"));
92 s_hSecDll = LoadLibrary(TEXT("secur32.dll"));
94 return CURLE_FAILED_INIT;
96 /* Get address of the InitSecurityInterfaceA function from the SSPI dll */
97 pInitSecurityInterface = (INITSECURITYINTERFACE_FN)
98 GetProcAddress(s_hSecDll, SECURITYENTRYPOINT);
99 if(!pInitSecurityInterface)
100 return CURLE_FAILED_INIT;
102 /* Get pointer to Security Service Provider Interface dispatch table */
103 s_pSecFn = pInitSecurityInterface();
105 return CURLE_FAILED_INIT;
112 * Curl_sspi_global_cleanup()
114 * This deinitializes the Security Service Provider Interface from libcurl.
117 void Curl_sspi_global_cleanup(void)
120 FreeLibrary(s_hSecDll);
126 #endif /* USE_WINDOWS_SSPI */