curl_sspi.c revision cee0338be80bb81b15101686d6f60864455f1e6e 
1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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 https://curl.haxx.se/docs/copyright.html.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23#include "curl_setup.h"
24
25#ifdef USE_WINDOWS_SSPI
26
27#include <curl/curl.h>
28#include "curl_sspi.h"
29#include "curl_multibyte.h"
30#include "system_win32.h"
31#include "warnless.h"
32
33/* The last #include files should be: */
34#include "curl_memory.h"
35#include "memdebug.h"
36
37/* We use our own typedef here since some headers might lack these */
38typedef PSecurityFunctionTable (APIENTRY *INITSECURITYINTERFACE_FN)(VOID);
39
40/* See definition of SECURITY_ENTRYPOINT in sspi.h */
41#ifdef UNICODE
42#  ifdef _WIN32_WCE
43#    define SECURITYENTRYPOINT L"InitSecurityInterfaceW"
44#  else
45#    define SECURITYENTRYPOINT "InitSecurityInterfaceW"
46#  endif
47#else
48#  define SECURITYENTRYPOINT "InitSecurityInterfaceA"
49#endif
50
51/* Handle of security.dll or secur32.dll, depending on Windows version */
52HMODULE s_hSecDll = NULL;
53
54/* Pointer to SSPI dispatch table */
55PSecurityFunctionTable s_pSecFn = NULL;
56
57/*
58 * Curl_sspi_global_init()
59 *
60 * This is used to load the Security Service Provider Interface (SSPI)
61 * dynamic link library portably across all Windows versions, without
62 * the need to directly link libcurl, nor the application using it, at
63 * build time.
64 *
65 * Once this function has been executed, Windows SSPI functions can be
66 * called through the Security Service Provider Interface dispatch table.
67 *
68 * Parameters:
69 *
70 * None.
71 *
72 * Returns CURLE_OK on success.
73 */
74CURLcode Curl_sspi_global_init(void)
75{
76  INITSECURITYINTERFACE_FN pInitSecurityInterface;
77
78  /* If security interface is not yet initialized try to do this */
79  if(!s_hSecDll) {
80    /* Security Service Provider Interface (SSPI) functions are located in
81     * security.dll on WinNT 4.0 and in secur32.dll on Win9x. Win2K and XP
82     * have both these DLLs (security.dll forwards calls to secur32.dll) */
83
84    /* Load SSPI dll into the address space of the calling process */
85    if(Curl_verify_windows_version(4, 0, PLATFORM_WINNT, VERSION_EQUAL))
86      s_hSecDll = Curl_load_library(TEXT("security.dll"));
87    else
88      s_hSecDll = Curl_load_library(TEXT("secur32.dll"));
89    if(!s_hSecDll)
90      return CURLE_FAILED_INIT;
91
92    /* Get address of the InitSecurityInterfaceA function from the SSPI dll */
93    pInitSecurityInterface = (INITSECURITYINTERFACE_FN)
94      GetProcAddress(s_hSecDll, SECURITYENTRYPOINT);
95    if(!pInitSecurityInterface)
96      return CURLE_FAILED_INIT;
97
98    /* Get pointer to Security Service Provider Interface dispatch table */
99    s_pSecFn = pInitSecurityInterface();
100    if(!s_pSecFn)
101      return CURLE_FAILED_INIT;
102  }
103
104  return CURLE_OK;
105}
106
107/*
108 * Curl_sspi_global_cleanup()
109 *
110 * This deinitializes the Security Service Provider Interface from libcurl.
111 *
112 * Parameters:
113 *
114 * None.
115 */
116void Curl_sspi_global_cleanup(void)
117{
118  if(s_hSecDll) {
119    FreeLibrary(s_hSecDll);
120    s_hSecDll = NULL;
121    s_pSecFn = NULL;
122  }
123}
124
125/*
126 * Curl_create_sspi_identity()
127 *
128 * This is used to populate a SSPI identity structure based on the supplied
129 * username and password.
130 *
131 * Parameters:
132 *
133 * userp    [in]     - The user name in the format User or Domain\User.
134 * passdwp  [in]     - The user's password.
135 * identity [in/out] - The identity structure.
136 *
137 * Returns CURLE_OK on success.
138 */
139CURLcode Curl_create_sspi_identity(const char *userp, const char *passwdp,
140                                   SEC_WINNT_AUTH_IDENTITY *identity)
141{
142  xcharp_u useranddomain;
143  xcharp_u user, dup_user;
144  xcharp_u domain, dup_domain;
145  xcharp_u passwd, dup_passwd;
146  size_t domlen = 0;
147
148  domain.const_tchar_ptr = TEXT("");
149
150  /* Initialize the identity */
151  memset(identity, 0, sizeof(*identity));
152
153  useranddomain.tchar_ptr = Curl_convert_UTF8_to_tchar((char *)userp);
154  if(!useranddomain.tchar_ptr)
155    return CURLE_OUT_OF_MEMORY;
156
157  user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('\\'));
158  if(!user.const_tchar_ptr)
159    user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('/'));
160
161  if(user.tchar_ptr) {
162    domain.tchar_ptr = useranddomain.tchar_ptr;
163    domlen = user.tchar_ptr - useranddomain.tchar_ptr;
164    user.tchar_ptr++;
165  }
166  else {
167    user.tchar_ptr = useranddomain.tchar_ptr;
168    domain.const_tchar_ptr = TEXT("");
169    domlen = 0;
170  }
171
172  /* Setup the identity's user and length */
173  dup_user.tchar_ptr = _tcsdup(user.tchar_ptr);
174  if(!dup_user.tchar_ptr) {
175    Curl_unicodefree(useranddomain.tchar_ptr);
176    return CURLE_OUT_OF_MEMORY;
177  }
178  identity->User = dup_user.tbyte_ptr;
179  identity->UserLength = curlx_uztoul(_tcslen(dup_user.tchar_ptr));
180  dup_user.tchar_ptr = NULL;
181
182  /* Setup the identity's domain and length */
183  dup_domain.tchar_ptr = malloc(sizeof(TCHAR) * (domlen + 1));
184  if(!dup_domain.tchar_ptr) {
185    Curl_unicodefree(useranddomain.tchar_ptr);
186    return CURLE_OUT_OF_MEMORY;
187  }
188  _tcsncpy(dup_domain.tchar_ptr, domain.tchar_ptr, domlen);
189  *(dup_domain.tchar_ptr + domlen) = TEXT('\0');
190  identity->Domain = dup_domain.tbyte_ptr;
191  identity->DomainLength = curlx_uztoul(domlen);
192  dup_domain.tchar_ptr = NULL;
193
194  Curl_unicodefree(useranddomain.tchar_ptr);
195
196  /* Setup the identity's password and length */
197  passwd.tchar_ptr = Curl_convert_UTF8_to_tchar((char *)passwdp);
198  if(!passwd.tchar_ptr)
199    return CURLE_OUT_OF_MEMORY;
200  dup_passwd.tchar_ptr = _tcsdup(passwd.tchar_ptr);
201  if(!dup_passwd.tchar_ptr) {
202    Curl_unicodefree(passwd.tchar_ptr);
203    return CURLE_OUT_OF_MEMORY;
204  }
205  identity->Password = dup_passwd.tbyte_ptr;
206  identity->PasswordLength = curlx_uztoul(_tcslen(dup_passwd.tchar_ptr));
207  dup_passwd.tchar_ptr = NULL;
208
209  Curl_unicodefree(passwd.tchar_ptr);
210
211  /* Setup the identity's flags */
212  identity->Flags = SECFLAG_WINNT_AUTH_IDENTITY;
213
214  return CURLE_OK;
215}
216
217/*
218 * Curl_sspi_free_identity()
219 *
220 * This is used to free the contents of a SSPI identifier structure.
221 *
222 * Parameters:
223 *
224 * identity [in/out] - The identity structure.
225 */
226void Curl_sspi_free_identity(SEC_WINNT_AUTH_IDENTITY *identity)
227{
228  if(identity) {
229    Curl_safefree(identity->User);
230    Curl_safefree(identity->Password);
231    Curl_safefree(identity->Domain);
232  }
233}
234
235#endif /* USE_WINDOWS_SSPI */
236