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20d0f77f | 1 | /* |
f3c7c613 | 2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
bcbf86ec | 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. | |
12 | * | |
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. | |
7368a6c8 | 23 | */ |
24 | ||
25 | #include "includes.h" | |
af4bd935 | 26 | RCSID("$OpenBSD: auth.c,v 1.54 2004/05/23 23:59:53 dtucker Exp $"); |
7368a6c8 | 27 | |
c1ef8333 | 28 | #ifdef HAVE_LOGIN_H |
29 | #include <login.h> | |
30 | #endif | |
f14ca4a4 | 31 | #ifdef USE_SHADOW |
4cb5ffa0 | 32 | #include <shadow.h> |
f14ca4a4 | 33 | #endif |
7368a6c8 | 34 | |
b4d02860 | 35 | #ifdef HAVE_LIBGEN_H |
c8445989 | 36 | #include <libgen.h> |
b4d02860 | 37 | #endif |
c8445989 | 38 | |
42f11eb2 | 39 | #include "xmalloc.h" |
40 | #include "match.h" | |
41 | #include "groupaccess.h" | |
42 | #include "log.h" | |
43 | #include "servconf.h" | |
e78a59f5 | 44 | #include "auth.h" |
59c97189 | 45 | #include "auth-options.h" |
42f11eb2 | 46 | #include "canohost.h" |
c8445989 | 47 | #include "buffer.h" |
48 | #include "bufaux.h" | |
d0c8ca5c | 49 | #include "uidswap.h" |
5f1f36b5 | 50 | #include "misc.h" |
01dafcb5 | 51 | #include "bufaux.h" |
52 | #include "packet.h" | |
e78a59f5 | 53 | |
7368a6c8 | 54 | /* import */ |
55 | extern ServerOptions options; | |
bc7dfc06 | 56 | extern Buffer loginmsg; |
7368a6c8 | 57 | |
01dafcb5 | 58 | /* Debugging messages */ |
59 | Buffer auth_debug; | |
60 | int auth_debug_init; | |
61 | ||
7368a6c8 | 62 | /* |
c6a69271 | 63 | * Check if the user is allowed to log in via ssh. If user is listed |
64 | * in DenyUsers or one of user's groups is listed in DenyGroups, false | |
65 | * will be returned. If AllowUsers isn't empty and user isn't listed | |
66 | * there, or if AllowGroups isn't empty and one of user's groups isn't | |
67 | * listed there, false will be returned. | |
7368a6c8 | 68 | * If the user's shell is not executable, false will be returned. |
6ae2364d | 69 | * Otherwise true is returned. |
7368a6c8 | 70 | */ |
a306f2dd | 71 | int |
7368a6c8 | 72 | allowed_user(struct passwd * pw) |
73 | { | |
74 | struct stat st; | |
da67ae18 | 75 | const char *hostname = NULL, *ipaddr = NULL, *passwd = NULL; |
614dee3a | 76 | char *shell; |
7368a6c8 | 77 | int i; |
f14ca4a4 | 78 | #ifdef USE_SHADOW |
3e6e3da0 | 79 | struct spwd *spw = NULL; |
e2ef2342 | 80 | #endif |
7368a6c8 | 81 | |
82 | /* Shouldn't be called if pw is NULL, but better safe than sorry... */ | |
c6a69271 | 83 | if (!pw || !pw->pw_name) |
7368a6c8 | 84 | return 0; |
85 | ||
f14ca4a4 | 86 | #ifdef USE_SHADOW |
3e6e3da0 | 87 | if (!options.use_pam) |
88 | spw = getspnam(pw->pw_name); | |
89 | #ifdef HAS_SHADOW_EXPIRE | |
f14ca4a4 | 90 | if (!options.use_pam && spw != NULL && auth_shadow_acctexpired(spw)) |
91 | return 0; | |
3e6e3da0 | 92 | #endif /* HAS_SHADOW_EXPIRE */ |
f14ca4a4 | 93 | #endif /* USE_SHADOW */ |
3e6e3da0 | 94 | |
aff51935 | 95 | /* grab passwd field for locked account check */ |
f14ca4a4 | 96 | #ifdef USE_SHADOW |
3e6e3da0 | 97 | if (spw != NULL) |
98 | passwd = spw->sp_pwdp; | |
99 | #else | |
100 | passwd = pw->pw_passwd; | |
b57c8e20 | 101 | #endif |
102 | ||
aff51935 | 103 | /* check for locked account */ |
da67ae18 | 104 | if (!options.use_pam && passwd && *passwd) { |
3e6e3da0 | 105 | int locked = 0; |
106 | ||
107 | #ifdef LOCKED_PASSWD_STRING | |
108 | if (strcmp(passwd, LOCKED_PASSWD_STRING) == 0) | |
109 | locked = 1; | |
110 | #endif | |
111 | #ifdef LOCKED_PASSWD_PREFIX | |
112 | if (strncmp(passwd, LOCKED_PASSWD_PREFIX, | |
113 | strlen(LOCKED_PASSWD_PREFIX)) == 0) | |
114 | locked = 1; | |
115 | #endif | |
116 | #ifdef LOCKED_PASSWD_SUBSTR | |
117 | if (strstr(passwd, LOCKED_PASSWD_SUBSTR)) | |
118 | locked = 1; | |
119 | #endif | |
120 | if (locked) { | |
121 | logit("User %.100s not allowed because account is locked", | |
122 | pw->pw_name); | |
123 | return 0; | |
124 | } | |
125 | } | |
126 | ||
301e9b01 | 127 | /* |
128 | * Get the shell from the password data. An empty shell field is | |
129 | * legal, and means /bin/sh. | |
130 | */ | |
131 | shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell; | |
132 | ||
133 | /* deny if shell does not exists or is not executable */ | |
b334badd | 134 | if (stat(shell, &st) != 0) { |
bbe88b6d | 135 | logit("User %.100s not allowed because shell %.100s does not exist", |
b334badd | 136 | pw->pw_name, shell); |
7368a6c8 | 137 | return 0; |
b334badd | 138 | } |
c390a3c8 | 139 | if (S_ISREG(st.st_mode) == 0 || |
140 | (st.st_mode & (S_IXOTH|S_IXUSR|S_IXGRP)) == 0) { | |
bbe88b6d | 141 | logit("User %.100s not allowed because shell %.100s is not executable", |
b334badd | 142 | pw->pw_name, shell); |
7368a6c8 | 143 | return 0; |
b334badd | 144 | } |
7368a6c8 | 145 | |
6805fc56 | 146 | if (options.num_deny_users > 0 || options.num_allow_users > 0) { |
c5a7d788 | 147 | hostname = get_canonical_hostname(options.use_dns); |
6805fc56 | 148 | ipaddr = get_remote_ipaddr(); |
149 | } | |
150 | ||
7368a6c8 | 151 | /* Return false if user is listed in DenyUsers */ |
152 | if (options.num_deny_users > 0) { | |
7368a6c8 | 153 | for (i = 0; i < options.num_deny_users; i++) |
762715ce | 154 | if (match_user(pw->pw_name, hostname, ipaddr, |
b334badd | 155 | options.deny_users[i])) { |
bbe88b6d | 156 | logit("User %.100s not allowed because listed in DenyUsers", |
762715ce | 157 | pw->pw_name); |
7368a6c8 | 158 | return 0; |
b334badd | 159 | } |
7368a6c8 | 160 | } |
161 | /* Return false if AllowUsers isn't empty and user isn't listed there */ | |
162 | if (options.num_allow_users > 0) { | |
7368a6c8 | 163 | for (i = 0; i < options.num_allow_users; i++) |
762715ce | 164 | if (match_user(pw->pw_name, hostname, ipaddr, |
80f8f24f | 165 | options.allow_users[i])) |
7368a6c8 | 166 | break; |
167 | /* i < options.num_allow_users iff we break for loop */ | |
b334badd | 168 | if (i >= options.num_allow_users) { |
bbe88b6d | 169 | logit("User %.100s not allowed because not listed in AllowUsers", |
b334badd | 170 | pw->pw_name); |
7368a6c8 | 171 | return 0; |
b334badd | 172 | } |
7368a6c8 | 173 | } |
7368a6c8 | 174 | if (options.num_deny_groups > 0 || options.num_allow_groups > 0) { |
c6a69271 | 175 | /* Get the user's group access list (primary and supplementary) */ |
b334badd | 176 | if (ga_init(pw->pw_name, pw->pw_gid) == 0) { |
bbe88b6d | 177 | logit("User %.100s not allowed because not in any group", |
b334badd | 178 | pw->pw_name); |
7368a6c8 | 179 | return 0; |
b334badd | 180 | } |
7368a6c8 | 181 | |
c6a69271 | 182 | /* Return false if one of user's groups is listed in DenyGroups */ |
183 | if (options.num_deny_groups > 0) | |
184 | if (ga_match(options.deny_groups, | |
185 | options.num_deny_groups)) { | |
186 | ga_free(); | |
bbe88b6d | 187 | logit("User %.100s not allowed because a group is listed in DenyGroups", |
b334badd | 188 | pw->pw_name); |
7368a6c8 | 189 | return 0; |
c6a69271 | 190 | } |
7368a6c8 | 191 | /* |
c6a69271 | 192 | * Return false if AllowGroups isn't empty and one of user's groups |
7368a6c8 | 193 | * isn't listed there |
194 | */ | |
c6a69271 | 195 | if (options.num_allow_groups > 0) |
196 | if (!ga_match(options.allow_groups, | |
197 | options.num_allow_groups)) { | |
198 | ga_free(); | |
bbe88b6d | 199 | logit("User %.100s not allowed because none of user's groups are listed in AllowGroups", |
b334badd | 200 | pw->pw_name); |
7368a6c8 | 201 | return 0; |
c6a69271 | 202 | } |
203 | ga_free(); | |
7368a6c8 | 204 | } |
205 | ||
206 | #ifdef WITH_AIXAUTHENTICATE | |
f3e87063 | 207 | /* |
208 | * Don't check loginrestrictions() for root account (use | |
209 | * PermitRootLogin to control logins via ssh), or if running as | |
210 | * non-root user (since loginrestrictions will always fail). | |
211 | */ | |
bc7dfc06 | 212 | if ((pw->pw_uid != 0) && (geteuid() == 0)) { |
213 | char *msg; | |
214 | ||
aff51935 | 215 | if (loginrestrictions(pw->pw_name, S_RLOGIN, NULL, &msg) != 0) { |
bc7dfc06 | 216 | int loginrestrict_errno = errno; |
217 | ||
218 | if (msg && *msg) { | |
219 | buffer_append(&loginmsg, msg, strlen(msg)); | |
220 | aix_remove_embedded_newlines(msg); | |
221 | logit("Login restricted for %s: %.100s", | |
222 | pw->pw_name, msg); | |
5daf7064 | 223 | } |
bc7dfc06 | 224 | /* Don't fail if /etc/nologin set */ |
aff51935 | 225 | if (!(loginrestrict_errno == EPERM && |
bc7dfc06 | 226 | stat(_PATH_NOLOGIN, &st) == 0)) |
227 | return 0; | |
c1ef8333 | 228 | } |
c1ef8333 | 229 | } |
7368a6c8 | 230 | #endif /* WITH_AIXAUTHENTICATE */ |
231 | ||
232 | /* We found no reason not to let this user try to log on... */ | |
233 | return 1; | |
234 | } | |
59c97189 | 235 | |
59c97189 | 236 | void |
237 | auth_log(Authctxt *authctxt, int authenticated, char *method, char *info) | |
238 | { | |
239 | void (*authlog) (const char *fmt,...) = verbose; | |
240 | char *authmsg; | |
241 | ||
242 | /* Raise logging level */ | |
243 | if (authenticated == 1 || | |
244 | !authctxt->valid || | |
af4bd935 | 245 | authctxt->failures >= options.max_authtries / 2 || |
59c97189 | 246 | strcmp(method, "password") == 0) |
a3568201 | 247 | authlog = logit; |
59c97189 | 248 | |
249 | if (authctxt->postponed) | |
250 | authmsg = "Postponed"; | |
251 | else | |
252 | authmsg = authenticated ? "Accepted" : "Failed"; | |
253 | ||
254 | authlog("%s %s for %s%.100s from %.200s port %d%s", | |
255 | authmsg, | |
256 | method, | |
257 | authctxt->valid ? "" : "illegal user ", | |
fad3754c | 258 | authctxt->user, |
59c97189 | 259 | get_remote_ipaddr(), |
260 | get_remote_port(), | |
261 | info); | |
56fd97d7 | 262 | |
73d9dad3 | 263 | #ifdef CUSTOM_FAILED_LOGIN |
56fd97d7 | 264 | if (authenticated == 0 && strcmp(method, "password") == 0) |
73d9dad3 | 265 | record_failed_login(authctxt->user, "ssh"); |
266 | #endif | |
59c97189 | 267 | } |
268 | ||
269 | /* | |
15853e93 | 270 | * Check whether root logins are disallowed. |
59c97189 | 271 | */ |
272 | int | |
15853e93 | 273 | auth_root_allowed(char *method) |
59c97189 | 274 | { |
15853e93 | 275 | switch (options.permit_root_login) { |
276 | case PERMIT_YES: | |
59c97189 | 277 | return 1; |
15853e93 | 278 | break; |
279 | case PERMIT_NO_PASSWD: | |
280 | if (strcmp(method, "password") != 0) | |
281 | return 1; | |
282 | break; | |
283 | case PERMIT_FORCED_ONLY: | |
284 | if (forced_command) { | |
bbe88b6d | 285 | logit("Root login accepted for forced command."); |
15853e93 | 286 | return 1; |
287 | } | |
288 | break; | |
59c97189 | 289 | } |
bbe88b6d | 290 | logit("ROOT LOGIN REFUSED FROM %.200s", get_remote_ipaddr()); |
15853e93 | 291 | return 0; |
59c97189 | 292 | } |
c8445989 | 293 | |
294 | ||
295 | /* | |
296 | * Given a template and a passwd structure, build a filename | |
297 | * by substituting % tokenised options. Currently, %% becomes '%', | |
298 | * %h becomes the home directory and %u the username. | |
299 | * | |
300 | * This returns a buffer allocated by xmalloc. | |
301 | */ | |
302 | char * | |
303 | expand_filename(const char *filename, struct passwd *pw) | |
304 | { | |
305 | Buffer buffer; | |
306 | char *file; | |
307 | const char *cp; | |
308 | ||
309 | /* | |
310 | * Build the filename string in the buffer by making the appropriate | |
311 | * substitutions to the given file name. | |
312 | */ | |
313 | buffer_init(&buffer); | |
314 | for (cp = filename; *cp; cp++) { | |
315 | if (cp[0] == '%' && cp[1] == '%') { | |
316 | buffer_append(&buffer, "%", 1); | |
317 | cp++; | |
318 | continue; | |
319 | } | |
320 | if (cp[0] == '%' && cp[1] == 'h') { | |
321 | buffer_append(&buffer, pw->pw_dir, strlen(pw->pw_dir)); | |
322 | cp++; | |
323 | continue; | |
324 | } | |
325 | if (cp[0] == '%' && cp[1] == 'u') { | |
326 | buffer_append(&buffer, pw->pw_name, | |
184eed6a | 327 | strlen(pw->pw_name)); |
c8445989 | 328 | cp++; |
329 | continue; | |
330 | } | |
331 | buffer_append(&buffer, cp, 1); | |
332 | } | |
333 | buffer_append(&buffer, "\0", 1); | |
334 | ||
335 | /* | |
336 | * Ensure that filename starts anchored. If not, be backward | |
337 | * compatible and prepend the '%h/' | |
338 | */ | |
339 | file = xmalloc(MAXPATHLEN); | |
340 | cp = buffer_ptr(&buffer); | |
341 | if (*cp != '/') | |
342 | snprintf(file, MAXPATHLEN, "%s/%s", pw->pw_dir, cp); | |
343 | else | |
344 | strlcpy(file, cp, MAXPATHLEN); | |
345 | ||
346 | buffer_free(&buffer); | |
347 | return file; | |
348 | } | |
349 | ||
350 | char * | |
351 | authorized_keys_file(struct passwd *pw) | |
352 | { | |
353 | return expand_filename(options.authorized_keys_file, pw); | |
354 | } | |
355 | ||
356 | char * | |
357 | authorized_keys_file2(struct passwd *pw) | |
358 | { | |
359 | return expand_filename(options.authorized_keys_file2, pw); | |
360 | } | |
361 | ||
d0c8ca5c | 362 | /* return ok if key exists in sysfile or userfile */ |
363 | HostStatus | |
364 | check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host, | |
365 | const char *sysfile, const char *userfile) | |
366 | { | |
367 | Key *found; | |
368 | char *user_hostfile; | |
369 | struct stat st; | |
17a3011c | 370 | HostStatus host_status; |
d0c8ca5c | 371 | |
372 | /* Check if we know the host and its host key. */ | |
373 | found = key_new(key->type); | |
374 | host_status = check_host_in_hostfile(sysfile, host, key, found, NULL); | |
375 | ||
376 | if (host_status != HOST_OK && userfile != NULL) { | |
377 | user_hostfile = tilde_expand_filename(userfile, pw->pw_uid); | |
378 | if (options.strict_modes && | |
379 | (stat(user_hostfile, &st) == 0) && | |
380 | ((st.st_uid != 0 && st.st_uid != pw->pw_uid) || | |
184eed6a | 381 | (st.st_mode & 022) != 0)) { |
bbe88b6d | 382 | logit("Authentication refused for %.100s: " |
d0c8ca5c | 383 | "bad owner or modes for %.200s", |
384 | pw->pw_name, user_hostfile); | |
385 | } else { | |
386 | temporarily_use_uid(pw); | |
387 | host_status = check_host_in_hostfile(user_hostfile, | |
388 | host, key, found, NULL); | |
389 | restore_uid(); | |
390 | } | |
391 | xfree(user_hostfile); | |
392 | } | |
393 | key_free(found); | |
394 | ||
395 | debug2("check_key_in_hostfiles: key %s for %s", host_status == HOST_OK ? | |
396 | "ok" : "not found", host); | |
397 | return host_status; | |
398 | } | |
399 | ||
400 | ||
c8445989 | 401 | /* |
402 | * Check a given file for security. This is defined as all components | |
d6097023 | 403 | * of the path to the file must be owned by either the owner of |
1ddf764b | 404 | * of the file or root and no directories must be group or world writable. |
c8445989 | 405 | * |
406 | * XXX Should any specific check be done for sym links ? | |
407 | * | |
408 | * Takes an open file descriptor, the file name, a uid and and | |
409 | * error buffer plus max size as arguments. | |
410 | * | |
411 | * Returns 0 on success and -1 on failure | |
412 | */ | |
413 | int | |
6978866a | 414 | secure_filename(FILE *f, const char *file, struct passwd *pw, |
415 | char *err, size_t errlen) | |
c8445989 | 416 | { |
6978866a | 417 | uid_t uid = pw->pw_uid; |
76fbdd47 | 418 | char buf[MAXPATHLEN], homedir[MAXPATHLEN]; |
c8445989 | 419 | char *cp; |
f6f02456 | 420 | int comparehome = 0; |
c8445989 | 421 | struct stat st; |
422 | ||
423 | if (realpath(file, buf) == NULL) { | |
424 | snprintf(err, errlen, "realpath %s failed: %s", file, | |
425 | strerror(errno)); | |
426 | return -1; | |
427 | } | |
f6f02456 | 428 | if (realpath(pw->pw_dir, homedir) != NULL) |
429 | comparehome = 1; | |
c8445989 | 430 | |
431 | /* check the open file to avoid races */ | |
432 | if (fstat(fileno(f), &st) < 0 || | |
433 | (st.st_uid != 0 && st.st_uid != uid) || | |
434 | (st.st_mode & 022) != 0) { | |
435 | snprintf(err, errlen, "bad ownership or modes for file %s", | |
436 | buf); | |
437 | return -1; | |
438 | } | |
439 | ||
440 | /* for each component of the canonical path, walking upwards */ | |
441 | for (;;) { | |
442 | if ((cp = dirname(buf)) == NULL) { | |
443 | snprintf(err, errlen, "dirname() failed"); | |
444 | return -1; | |
445 | } | |
446 | strlcpy(buf, cp, sizeof(buf)); | |
447 | ||
448 | debug3("secure_filename: checking '%s'", buf); | |
449 | if (stat(buf, &st) < 0 || | |
450 | (st.st_uid != 0 && st.st_uid != uid) || | |
451 | (st.st_mode & 022) != 0) { | |
184eed6a | 452 | snprintf(err, errlen, |
c8445989 | 453 | "bad ownership or modes for directory %s", buf); |
454 | return -1; | |
455 | } | |
456 | ||
afd501f9 | 457 | /* If are passed the homedir then we can stop */ |
f6f02456 | 458 | if (comparehome && strcmp(homedir, buf) == 0) { |
afd501f9 | 459 | debug3("secure_filename: terminating check at '%s'", |
460 | buf); | |
461 | break; | |
462 | } | |
c8445989 | 463 | /* |
464 | * dirname should always complete with a "/" path, | |
465 | * but we can be paranoid and check for "." too | |
466 | */ | |
467 | if ((strcmp("/", buf) == 0) || (strcmp(".", buf) == 0)) | |
468 | break; | |
469 | } | |
470 | return 0; | |
471 | } | |
443fa1cd | 472 | |
473 | struct passwd * | |
474 | getpwnamallow(const char *user) | |
475 | { | |
1836f69f | 476 | #ifdef HAVE_LOGIN_CAP |
477 | extern login_cap_t *lc; | |
478 | #ifdef BSD_AUTH | |
479 | auth_session_t *as; | |
480 | #endif | |
481 | #endif | |
443fa1cd | 482 | struct passwd *pw; |
483 | ||
484 | pw = getpwnam(user); | |
c2802d92 | 485 | if (pw == NULL) { |
bbe88b6d | 486 | logit("Illegal user %.100s from %.100s", |
c2802d92 | 487 | user, get_remote_ipaddr()); |
73d9dad3 | 488 | #ifdef CUSTOM_FAILED_LOGIN |
489 | record_failed_login(user, "ssh"); | |
819d3f09 | 490 | #endif |
c2802d92 | 491 | return (NULL); |
492 | } | |
493 | if (!allowed_user(pw)) | |
1836f69f | 494 | return (NULL); |
495 | #ifdef HAVE_LOGIN_CAP | |
496 | if ((lc = login_getclass(pw->pw_class)) == NULL) { | |
497 | debug("unable to get login class: %s", user); | |
498 | return (NULL); | |
499 | } | |
500 | #ifdef BSD_AUTH | |
501 | if ((as = auth_open()) == NULL || auth_setpwd(as, pw) != 0 || | |
65721f9c | 502 | auth_approval(as, lc, pw->pw_name, "ssh") <= 0) { |
1836f69f | 503 | debug("Approval failure for %s", user); |
443fa1cd | 504 | pw = NULL; |
1836f69f | 505 | } |
506 | if (as != NULL) | |
507 | auth_close(as); | |
508 | #endif | |
509 | #endif | |
06bea668 | 510 | if (pw != NULL) |
511 | return (pwcopy(pw)); | |
512 | return (NULL); | |
443fa1cd | 513 | } |
01dafcb5 | 514 | |
515 | void | |
516 | auth_debug_add(const char *fmt,...) | |
517 | { | |
518 | char buf[1024]; | |
519 | va_list args; | |
520 | ||
521 | if (!auth_debug_init) | |
522 | return; | |
523 | ||
524 | va_start(args, fmt); | |
525 | vsnprintf(buf, sizeof(buf), fmt, args); | |
526 | va_end(args); | |
527 | buffer_put_cstring(&auth_debug, buf); | |
528 | } | |
529 | ||
530 | void | |
531 | auth_debug_send(void) | |
532 | { | |
533 | char *msg; | |
534 | ||
535 | if (!auth_debug_init) | |
536 | return; | |
537 | while (buffer_len(&auth_debug)) { | |
538 | msg = buffer_get_string(&auth_debug, NULL); | |
539 | packet_send_debug("%s", msg); | |
540 | xfree(msg); | |
541 | } | |
542 | } | |
543 | ||
544 | void | |
545 | auth_debug_reset(void) | |
546 | { | |
547 | if (auth_debug_init) | |
548 | buffer_clear(&auth_debug); | |
549 | else { | |
550 | buffer_init(&auth_debug); | |
551 | auth_debug_init = 1; | |
552 | } | |
553 | } | |
96d0bf74 | 554 | |
555 | struct passwd * | |
556 | fakepw(void) | |
557 | { | |
558 | static struct passwd fake; | |
559 | ||
560 | memset(&fake, 0, sizeof(fake)); | |
561 | fake.pw_name = "NOUSER"; | |
562 | fake.pw_passwd = | |
b6453d99 | 563 | "$2a$06$r3.juUaHZDlIbQaO2dS9FuYxL1W9M81R1Tc92PoSNmzvpEqLkLGrK"; |
96d0bf74 | 564 | fake.pw_gecos = "NOUSER"; |
f6be21a0 | 565 | fake.pw_uid = (uid_t)-1; |
566 | fake.pw_gid = (gid_t)-1; | |
96d0bf74 | 567 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
568 | fake.pw_class = ""; | |
569 | #endif | |
570 | fake.pw_dir = "/nonexist"; | |
571 | fake.pw_shell = "/nonexist"; | |
572 | ||
573 | return (&fake); | |
574 | } |