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 */
38 typedef 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 */
52 HMODULE s_hSecDll = NULL;
53
54 /* Pointer to SSPI dispatch table */
55 PSecurityFunctionTable 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 */
Curl_sspi_global_init(void)74 CURLcode 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 =
94 CURLX_FUNCTION_CAST(INITSECURITYINTERFACE_FN,
95 (GetProcAddress(s_hSecDll, SECURITYENTRYPOINT)));
96 if(!pInitSecurityInterface)
97 return CURLE_FAILED_INIT;
98
99 /* Get pointer to Security Service Provider Interface dispatch table */
100 s_pSecFn = pInitSecurityInterface();
101 if(!s_pSecFn)
102 return CURLE_FAILED_INIT;
103 }
104
105 return CURLE_OK;
106 }
107
108 /*
109 * Curl_sspi_global_cleanup()
110 *
111 * This deinitializes the Security Service Provider Interface from libcurl.
112 *
113 * Parameters:
114 *
115 * None.
116 */
Curl_sspi_global_cleanup(void)117 void Curl_sspi_global_cleanup(void)
118 {
119 if(s_hSecDll) {
120 FreeLibrary(s_hSecDll);
121 s_hSecDll = NULL;
122 s_pSecFn = NULL;
123 }
124 }
125
126 /*
127 * Curl_create_sspi_identity()
128 *
129 * This is used to populate a SSPI identity structure based on the supplied
130 * username and password.
131 *
132 * Parameters:
133 *
134 * userp [in] - The user name in the format User or Domain\User.
135 * passwdp [in] - The user's password.
136 * identity [in/out] - The identity structure.
137 *
138 * Returns CURLE_OK on success.
139 */
Curl_create_sspi_identity(const char * userp,const char * passwdp,SEC_WINNT_AUTH_IDENTITY * identity)140 CURLcode Curl_create_sspi_identity(const char *userp, const char *passwdp,
141 SEC_WINNT_AUTH_IDENTITY *identity)
142 {
143 xcharp_u useranddomain;
144 xcharp_u user, dup_user;
145 xcharp_u domain, dup_domain;
146 xcharp_u passwd, dup_passwd;
147 size_t domlen = 0;
148
149 domain.const_tchar_ptr = TEXT("");
150
151 /* Initialize the identity */
152 memset(identity, 0, sizeof(*identity));
153
154 useranddomain.tchar_ptr = Curl_convert_UTF8_to_tchar((char *)userp);
155 if(!useranddomain.tchar_ptr)
156 return CURLE_OUT_OF_MEMORY;
157
158 user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('\\'));
159 if(!user.const_tchar_ptr)
160 user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('/'));
161
162 if(user.tchar_ptr) {
163 domain.tchar_ptr = useranddomain.tchar_ptr;
164 domlen = user.tchar_ptr - useranddomain.tchar_ptr;
165 user.tchar_ptr++;
166 }
167 else {
168 user.tchar_ptr = useranddomain.tchar_ptr;
169 domain.const_tchar_ptr = TEXT("");
170 domlen = 0;
171 }
172
173 /* Setup the identity's user and length */
174 dup_user.tchar_ptr = _tcsdup(user.tchar_ptr);
175 if(!dup_user.tchar_ptr) {
176 Curl_unicodefree(useranddomain.tchar_ptr);
177 return CURLE_OUT_OF_MEMORY;
178 }
179 identity->User = dup_user.tbyte_ptr;
180 identity->UserLength = curlx_uztoul(_tcslen(dup_user.tchar_ptr));
181 dup_user.tchar_ptr = NULL;
182
183 /* Setup the identity's domain and length */
184 dup_domain.tchar_ptr = malloc(sizeof(TCHAR) * (domlen + 1));
185 if(!dup_domain.tchar_ptr) {
186 Curl_unicodefree(useranddomain.tchar_ptr);
187 return CURLE_OUT_OF_MEMORY;
188 }
189 _tcsncpy(dup_domain.tchar_ptr, domain.tchar_ptr, domlen);
190 *(dup_domain.tchar_ptr + domlen) = TEXT('\0');
191 identity->Domain = dup_domain.tbyte_ptr;
192 identity->DomainLength = curlx_uztoul(domlen);
193 dup_domain.tchar_ptr = NULL;
194
195 Curl_unicodefree(useranddomain.tchar_ptr);
196
197 /* Setup the identity's password and length */
198 passwd.tchar_ptr = Curl_convert_UTF8_to_tchar((char *)passwdp);
199 if(!passwd.tchar_ptr)
200 return CURLE_OUT_OF_MEMORY;
201 dup_passwd.tchar_ptr = _tcsdup(passwd.tchar_ptr);
202 if(!dup_passwd.tchar_ptr) {
203 Curl_unicodefree(passwd.tchar_ptr);
204 return CURLE_OUT_OF_MEMORY;
205 }
206 identity->Password = dup_passwd.tbyte_ptr;
207 identity->PasswordLength = curlx_uztoul(_tcslen(dup_passwd.tchar_ptr));
208 dup_passwd.tchar_ptr = NULL;
209
210 Curl_unicodefree(passwd.tchar_ptr);
211
212 /* Setup the identity's flags */
213 identity->Flags = SECFLAG_WINNT_AUTH_IDENTITY;
214
215 return CURLE_OK;
216 }
217
218 /*
219 * Curl_sspi_free_identity()
220 *
221 * This is used to free the contents of a SSPI identifier structure.
222 *
223 * Parameters:
224 *
225 * identity [in/out] - The identity structure.
226 */
Curl_sspi_free_identity(SEC_WINNT_AUTH_IDENTITY * identity)227 void Curl_sspi_free_identity(SEC_WINNT_AUTH_IDENTITY *identity)
228 {
229 if(identity) {
230 Curl_safefree(identity->User);
231 Curl_safefree(identity->Password);
232 Curl_safefree(identity->Domain);
233 }
234 }
235
236 #endif /* USE_WINDOWS_SSPI */
237