]>
Commit | Line | Data |
---|---|---|
3c62e7eb | 1 | /* |
4e51cc76 | 2 | * Copyright (c) 2000, 2001, Corinna Vinschen <vinschen@cygnus.com> |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
3c62e7eb | 12 | * |
4e51cc76 | 13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
3c62e7eb | 23 | * |
24 | * Created: Sat Sep 02 12:17:00 2000 cv | |
25 | * | |
26 | * This file contains functions for forcing opened file descriptors to | |
27 | * binary mode on Windows systems. | |
28 | */ | |
29 | ||
0b202697 | 30 | #include "includes.h" |
31 | ||
3c62e7eb | 32 | #ifdef HAVE_CYGWIN |
2f125ca1 | 33 | |
dd41ba6f | 34 | #if defined(open) && open == binary_open |
35 | # undef open | |
36 | #endif | |
37 | #if defined(pipe) && open == binary_pipe | |
38 | # undef pipe | |
39 | #endif | |
40 | ||
97ea266c | 41 | #include <sys/types.h> |
42 | #include <sys/stat.h> | |
31fb6aaf | 43 | #include <sys/utsname.h> |
9cd45ea4 | 44 | #include <sys/vfs.h> |
97ea266c | 45 | |
46 | #include <fcntl.h> | |
47 | #include <stdlib.h> | |
48 | #include <unistd.h> | |
9cd45ea4 | 49 | #include <windows.h> |
97ea266c | 50 | |
3c502155 | 51 | #include "xmalloc.h" |
9cd45ea4 | 52 | #define is_winnt (GetVersion() < 0x80000000) |
3c62e7eb | 53 | |
31fb6aaf | 54 | #define ntsec_on(c) ((c) && strstr((c),"ntsec") && !strstr((c),"nontsec")) |
f00addc9 | 55 | #define ntsec_off(c) ((c) && strstr((c),"nontsec")) |
31fb6aaf | 56 | #define ntea_on(c) ((c) && strstr((c),"ntea") && !strstr((c),"nontea")) |
57 | ||
9901cb37 | 58 | int |
59 | binary_open(const char *filename, int flags, ...) | |
3c62e7eb | 60 | { |
58e7f038 | 61 | va_list ap; |
62 | mode_t mode; | |
63 | ||
64 | va_start(ap, flags); | |
65 | mode = va_arg(ap, mode_t); | |
66 | va_end(ap); | |
9901cb37 | 67 | return (open(filename, flags | O_BINARY, mode)); |
3c62e7eb | 68 | } |
69 | ||
9901cb37 | 70 | int |
71 | binary_pipe(int fd[2]) | |
3c62e7eb | 72 | { |
2f125ca1 | 73 | int ret = pipe(fd); |
74 | ||
75 | if (!ret) { | |
9901cb37 | 76 | setmode(fd[0], O_BINARY); |
77 | setmode(fd[1], O_BINARY); | |
2f125ca1 | 78 | } |
9901cb37 | 79 | return (ret); |
9cd45ea4 | 80 | } |
81 | ||
f00addc9 | 82 | #define HAS_CREATE_TOKEN 1 |
83 | #define HAS_NTSEC_BY_DEFAULT 2 | |
917ee1d2 | 84 | #define HAS_CREATE_TOKEN_WO_NTSEC 3 |
f00addc9 | 85 | |
9901cb37 | 86 | static int |
87 | has_capability(int what) | |
f00addc9 | 88 | { |
f00addc9 | 89 | static int inited; |
90 | static int has_create_token; | |
91 | static int has_ntsec_by_default; | |
917ee1d2 | 92 | static int has_create_token_wo_ntsec; |
f00addc9 | 93 | |
9901cb37 | 94 | /* |
95 | * has_capability() basically calls uname() and checks if | |
96 | * specific capabilities of Cygwin can be evaluated from that. | |
97 | * This simplifies the calling functions which only have to ask | |
98 | * for a capability using has_capability() instead of having | |
99 | * to figure that out by themselves. | |
100 | */ | |
f00addc9 | 101 | if (!inited) { |
102 | struct utsname uts; | |
f00addc9 | 103 | |
104 | if (!uname(&uts)) { | |
9901cb37 | 105 | int major_high = 0, major_low = 0, minor = 0; |
106 | int api_major_version = 0, api_minor_version = 0; | |
f00addc9 | 107 | char *c; |
108 | ||
109 | sscanf(uts.release, "%d.%d.%d", &major_high, | |
9901cb37 | 110 | &major_low, &minor); |
111 | if ((c = strchr(uts.release, '(')) != NULL) { | |
f00addc9 | 112 | sscanf(c + 1, "%d.%d", &api_major_version, |
9901cb37 | 113 | &api_minor_version); |
114 | } | |
f00addc9 | 115 | if (major_high > 1 || |
116 | (major_high == 1 && (major_low > 3 || | |
9901cb37 | 117 | (major_low == 3 && minor >= 2)))) |
f00addc9 | 118 | has_create_token = 1; |
119 | if (api_major_version > 0 || api_minor_version >= 56) | |
120 | has_ntsec_by_default = 1; | |
917ee1d2 | 121 | if (major_high > 1 || |
122 | (major_high == 1 && major_low >= 5)) | |
123 | has_create_token_wo_ntsec = 1; | |
f00addc9 | 124 | inited = 1; |
125 | } | |
126 | } | |
127 | switch (what) { | |
128 | case HAS_CREATE_TOKEN: | |
9901cb37 | 129 | return (has_create_token); |
f00addc9 | 130 | case HAS_NTSEC_BY_DEFAULT: |
9901cb37 | 131 | return (has_ntsec_by_default); |
917ee1d2 | 132 | case HAS_CREATE_TOKEN_WO_NTSEC: |
133 | return (has_create_token_wo_ntsec); | |
f00addc9 | 134 | } |
9901cb37 | 135 | return (0); |
f00addc9 | 136 | } |
137 | ||
9901cb37 | 138 | int |
139 | check_nt_auth(int pwd_authenticated, struct passwd *pw) | |
9cd45ea4 | 140 | { |
141 | /* | |
2f125ca1 | 142 | * The only authentication which is able to change the user |
143 | * context on NT systems is the password authentication. So | |
144 | * we deny all requsts for changing the user context if another | |
145 | * authentication method is used. | |
31fb6aaf | 146 | * |
147 | * This doesn't apply to Cygwin versions >= 1.3.2 anymore which | |
148 | * uses the undocumented NtCreateToken() call to create a user | |
149 | * token if the process has the appropriate privileges and if | |
150 | * CYGWIN ntsec setting is on. | |
2f125ca1 | 151 | */ |
31fb6aaf | 152 | static int has_create_token = -1; |
153 | ||
e9571a2c | 154 | if (pw == NULL) |
155 | return 0; | |
31fb6aaf | 156 | if (is_winnt) { |
157 | if (has_create_token < 0) { | |
31fb6aaf | 158 | char *cygwin = getenv("CYGWIN"); |
159 | ||
160 | has_create_token = 0; | |
f00addc9 | 161 | if (has_capability(HAS_CREATE_TOKEN) && |
162 | (ntsec_on(cygwin) || | |
9901cb37 | 163 | (has_capability(HAS_NTSEC_BY_DEFAULT) && |
917ee1d2 | 164 | !ntsec_off(cygwin)) || |
165 | has_capability(HAS_CREATE_TOKEN_WO_NTSEC))) | |
f00addc9 | 166 | has_create_token = 1; |
31fb6aaf | 167 | } |
168 | if (has_create_token < 1 && | |
e9571a2c | 169 | !pwd_authenticated && geteuid() != pw->pw_uid) |
9901cb37 | 170 | return (0); |
31fb6aaf | 171 | } |
9901cb37 | 172 | return (1); |
9cd45ea4 | 173 | } |
174 | ||
9901cb37 | 175 | int |
176 | check_ntsec(const char *filename) | |
9cd45ea4 | 177 | { |
178 | char *cygwin; | |
9901cb37 | 179 | int allow_ntea = 0, allow_ntsec = 0; |
9cd45ea4 | 180 | struct statfs fsstat; |
181 | ||
182 | /* Windows 95/98/ME don't support file system security at all. */ | |
183 | if (!is_winnt) | |
9901cb37 | 184 | return (0); |
9cd45ea4 | 185 | |
186 | /* Evaluate current CYGWIN settings. */ | |
31fb6aaf | 187 | cygwin = getenv("CYGWIN"); |
188 | allow_ntea = ntea_on(cygwin); | |
f00addc9 | 189 | allow_ntsec = ntsec_on(cygwin) || |
9901cb37 | 190 | (has_capability(HAS_NTSEC_BY_DEFAULT) && !ntsec_off(cygwin)); |
9cd45ea4 | 191 | |
192 | /* | |
193 | * `ntea' is an emulation of POSIX attributes. It doesn't support | |
194 | * real file level security as ntsec on NTFS file systems does | |
195 | * but it supports FAT filesystems. `ntea' is minimum requirement | |
196 | * for security checks. | |
197 | */ | |
198 | if (allow_ntea) | |
9901cb37 | 199 | return (1); |
9cd45ea4 | 200 | |
201 | /* | |
202 | * Retrieve file system flags. In Cygwin, file system flags are | |
203 | * copied to f_type which has no meaning in Win32 itself. | |
204 | */ | |
205 | if (statfs(filename, &fsstat)) | |
9901cb37 | 206 | return (1); |
9cd45ea4 | 207 | |
208 | /* | |
209 | * Only file systems supporting ACLs are able to set permissions. | |
210 | * `ntsec' is the setting in Cygwin which switches using of NTFS | |
211 | * ACLs to support POSIX permissions on files. | |
212 | */ | |
213 | if (fsstat.f_type & FS_PERSISTENT_ACLS) | |
9901cb37 | 214 | return (allow_ntsec); |
9cd45ea4 | 215 | |
9901cb37 | 216 | return (0); |
3c62e7eb | 217 | } |
2f125ca1 | 218 | |
9901cb37 | 219 | void |
220 | register_9x_service(void) | |
ffb8d130 | 221 | { |
222 | HINSTANCE kerneldll; | |
223 | DWORD (*RegisterServiceProcess)(DWORD, DWORD); | |
224 | ||
225 | /* The service register mechanism in 9x/Me is pretty different from | |
226 | * NT/2K/XP. In NT/2K/XP we're using a special service starter | |
227 | * application to register and control sshd as service. This method | |
228 | * doesn't play nicely with 9x/Me. For that reason we register here | |
229 | * as service when running under 9x/Me. This function is only called | |
230 | * by the child sshd when it's going to daemonize. | |
231 | */ | |
232 | if (is_winnt) | |
233 | return; | |
9901cb37 | 234 | if (!(kerneldll = LoadLibrary("KERNEL32.DLL"))) |
ffb8d130 | 235 | return; |
9901cb37 | 236 | if (!(RegisterServiceProcess = (DWORD (*)(DWORD, DWORD)) |
237 | GetProcAddress(kerneldll, "RegisterServiceProcess"))) | |
ffb8d130 | 238 | return; |
239 | RegisterServiceProcess(0, 1); | |
240 | } | |
241 | ||
3c502155 | 242 | #define NL(x) x, (sizeof (x) - 1) |
243 | #define WENV_SIZ (sizeof (wenv_arr) / sizeof (wenv_arr[0])) | |
244 | ||
245 | static struct wenv { | |
246 | const char *name; | |
247 | size_t namelen; | |
248 | } wenv_arr[] = { | |
249 | { NL("ALLUSERSPROFILE=") }, | |
250 | { NL("COMMONPROGRAMFILES=") }, | |
251 | { NL("COMPUTERNAME=") }, | |
252 | { NL("COMSPEC=") }, | |
b54ffe05 | 253 | { NL("CYGWIN=") }, |
3c502155 | 254 | { NL("NUMBER_OF_PROCESSORS=") }, |
255 | { NL("OS=") }, | |
256 | { NL("PATH=") }, | |
257 | { NL("PATHEXT=") }, | |
258 | { NL("PROCESSOR_ARCHITECTURE=") }, | |
259 | { NL("PROCESSOR_IDENTIFIER=") }, | |
260 | { NL("PROCESSOR_LEVEL=") }, | |
261 | { NL("PROCESSOR_REVISION=") }, | |
262 | { NL("PROGRAMFILES=") }, | |
263 | { NL("SYSTEMDRIVE=") }, | |
264 | { NL("SYSTEMROOT=") }, | |
265 | { NL("TMP=") }, | |
266 | { NL("TEMP=") }, | |
b54ffe05 | 267 | { NL("WINDIR=") } |
3c502155 | 268 | }; |
269 | ||
270 | char ** | |
271 | fetch_windows_environment(void) | |
272 | { | |
273 | char **e, **p; | |
06a517d4 | 274 | unsigned int i, idx = 0; |
3c502155 | 275 | |
01d35895 | 276 | p = xcalloc(WENV_SIZ + 1, sizeof(char *)); |
3c502155 | 277 | for (e = environ; *e != NULL; ++e) { |
278 | for (i = 0; i < WENV_SIZ; ++i) { | |
279 | if (!strncmp(*e, wenv_arr[i].name, wenv_arr[i].namelen)) | |
280 | p[idx++] = *e; | |
281 | } | |
282 | } | |
283 | p[idx] = NULL; | |
284 | return p; | |
285 | } | |
286 | ||
287 | void | |
288 | free_windows_environment(char **p) | |
289 | { | |
290 | xfree(p); | |
291 | } | |
292 | ||
2f125ca1 | 293 | #endif /* HAVE_CYGWIN */ |