1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2020, 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.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 "version_win32.h"
32 #include "warnless.h"
33
34 /* The last #include files should be: */
35 #include "curl_memory.h"
36 #include "memdebug.h"
37
38 /* We use our own typedef here since some headers might lack these */
39 typedef PSecurityFunctionTable (APIENTRY *INITSECURITYINTERFACE_FN)(VOID);
40
41 /* See definition of SECURITY_ENTRYPOINT in sspi.h */
42 #ifdef UNICODE
43 # ifdef _WIN32_WCE
44 # define SECURITYENTRYPOINT L"InitSecurityInterfaceW"
45 # else
46 # define SECURITYENTRYPOINT "InitSecurityInterfaceW"
47 # endif
48 #else
49 # define SECURITYENTRYPOINT "InitSecurityInterfaceA"
50 #endif
51
52 /* Handle of security.dll or secur32.dll, depending on Windows version */
53 HMODULE s_hSecDll = NULL;
54
55 /* Pointer to SSPI dispatch table */
56 PSecurityFunctionTable s_pSecFn = NULL;
57
58 /*
59 * Curl_sspi_global_init()
60 *
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
64 * build time.
65 *
66 * Once this function has been executed, Windows SSPI functions can be
67 * called through the Security Service Provider Interface dispatch table.
68 *
69 * Parameters:
70 *
71 * None.
72 *
73 * Returns CURLE_OK on success.
74 */
Curl_sspi_global_init(void)75 CURLcode Curl_sspi_global_init(void)
76 {
77 INITSECURITYINTERFACE_FN pInitSecurityInterface;
78
79 /* If security interface is not yet initialized try to do this */
80 if(!s_hSecDll) {
81 /* Security Service Provider Interface (SSPI) functions are located in
82 * security.dll on WinNT 4.0 and in secur32.dll on Win9x. Win2K and XP
83 * have both these DLLs (security.dll forwards calls to secur32.dll) */
84
85 /* Load SSPI dll into the address space of the calling process */
86 if(curlx_verify_windows_version(4, 0, PLATFORM_WINNT, VERSION_EQUAL))
87 s_hSecDll = Curl_load_library(TEXT("security.dll"));
88 else
89 s_hSecDll = Curl_load_library(TEXT("secur32.dll"));
90 if(!s_hSecDll)
91 return CURLE_FAILED_INIT;
92
93 /* Get address of the InitSecurityInterfaceA function from the SSPI dll */
94 pInitSecurityInterface =
95 CURLX_FUNCTION_CAST(INITSECURITYINTERFACE_FN,
96 (GetProcAddress(s_hSecDll, SECURITYENTRYPOINT)));
97 if(!pInitSecurityInterface)
98 return CURLE_FAILED_INIT;
99
100 /* Get pointer to Security Service Provider Interface dispatch table */
101 s_pSecFn = pInitSecurityInterface();
102 if(!s_pSecFn)
103 return CURLE_FAILED_INIT;
104 }
105
106 return CURLE_OK;
107 }
108
109 /*
110 * Curl_sspi_global_cleanup()
111 *
112 * This deinitializes the Security Service Provider Interface from libcurl.
113 *
114 * Parameters:
115 *
116 * None.
117 */
Curl_sspi_global_cleanup(void)118 void Curl_sspi_global_cleanup(void)
119 {
120 if(s_hSecDll) {
121 FreeLibrary(s_hSecDll);
122 s_hSecDll = NULL;
123 s_pSecFn = NULL;
124 }
125 }
126
127 /*
128 * Curl_create_sspi_identity()
129 *
130 * This is used to populate a SSPI identity structure based on the supplied
131 * username and password.
132 *
133 * Parameters:
134 *
135 * userp [in] - The user name in the format User or Domain\User.
136 * passwdp [in] - The user's password.
137 * identity [in/out] - The identity structure.
138 *
139 * Returns CURLE_OK on success.
140 */
Curl_create_sspi_identity(const char * userp,const char * passwdp,SEC_WINNT_AUTH_IDENTITY * identity)141 CURLcode Curl_create_sspi_identity(const char *userp, const char *passwdp,
142 SEC_WINNT_AUTH_IDENTITY *identity)
143 {
144 xcharp_u useranddomain;
145 xcharp_u user, dup_user;
146 xcharp_u domain, dup_domain;
147 xcharp_u passwd, dup_passwd;
148 size_t domlen = 0;
149
150 domain.const_tchar_ptr = TEXT("");
151
152 /* Initialize the identity */
153 memset(identity, 0, sizeof(*identity));
154
155 useranddomain.tchar_ptr = curlx_convert_UTF8_to_tchar((char *)userp);
156 if(!useranddomain.tchar_ptr)
157 return CURLE_OUT_OF_MEMORY;
158
159 user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('\\'));
160 if(!user.const_tchar_ptr)
161 user.const_tchar_ptr = _tcschr(useranddomain.const_tchar_ptr, TEXT('/'));
162
163 if(user.tchar_ptr) {
164 domain.tchar_ptr = useranddomain.tchar_ptr;
165 domlen = user.tchar_ptr - useranddomain.tchar_ptr;
166 user.tchar_ptr++;
167 }
168 else {
169 user.tchar_ptr = useranddomain.tchar_ptr;
170 domain.const_tchar_ptr = TEXT("");
171 domlen = 0;
172 }
173
174 /* Setup the identity's user and length */
175 dup_user.tchar_ptr = _tcsdup(user.tchar_ptr);
176 if(!dup_user.tchar_ptr) {
177 curlx_unicodefree(useranddomain.tchar_ptr);
178 return CURLE_OUT_OF_MEMORY;
179 }
180 identity->User = dup_user.tbyte_ptr;
181 identity->UserLength = curlx_uztoul(_tcslen(dup_user.tchar_ptr));
182 dup_user.tchar_ptr = NULL;
183
184 /* Setup the identity's domain and length */
185 dup_domain.tchar_ptr = malloc(sizeof(TCHAR) * (domlen + 1));
186 if(!dup_domain.tchar_ptr) {
187 curlx_unicodefree(useranddomain.tchar_ptr);
188 return CURLE_OUT_OF_MEMORY;
189 }
190 _tcsncpy(dup_domain.tchar_ptr, domain.tchar_ptr, domlen);
191 *(dup_domain.tchar_ptr + domlen) = TEXT('\0');
192 identity->Domain = dup_domain.tbyte_ptr;
193 identity->DomainLength = curlx_uztoul(domlen);
194 dup_domain.tchar_ptr = NULL;
195
196 curlx_unicodefree(useranddomain.tchar_ptr);
197
198 /* Setup the identity's password and length */
199 passwd.tchar_ptr = curlx_convert_UTF8_to_tchar((char *)passwdp);
200 if(!passwd.tchar_ptr)
201 return CURLE_OUT_OF_MEMORY;
202 dup_passwd.tchar_ptr = _tcsdup(passwd.tchar_ptr);
203 if(!dup_passwd.tchar_ptr) {
204 curlx_unicodefree(passwd.tchar_ptr);
205 return CURLE_OUT_OF_MEMORY;
206 }
207 identity->Password = dup_passwd.tbyte_ptr;
208 identity->PasswordLength = curlx_uztoul(_tcslen(dup_passwd.tchar_ptr));
209 dup_passwd.tchar_ptr = NULL;
210
211 curlx_unicodefree(passwd.tchar_ptr);
212
213 /* Setup the identity's flags */
214 identity->Flags = SECFLAG_WINNT_AUTH_IDENTITY;
215
216 return CURLE_OK;
217 }
218
219 /*
220 * Curl_sspi_free_identity()
221 *
222 * This is used to free the contents of a SSPI identifier structure.
223 *
224 * Parameters:
225 *
226 * identity [in/out] - The identity structure.
227 */
Curl_sspi_free_identity(SEC_WINNT_AUTH_IDENTITY * identity)228 void Curl_sspi_free_identity(SEC_WINNT_AUTH_IDENTITY *identity)
229 {
230 if(identity) {
231 Curl_safefree(identity->User);
232 Curl_safefree(identity->Password);
233 Curl_safefree(identity->Domain);
234 }
235 }
236
237 #endif /* USE_WINDOWS_SSPI */
238