Annotation of src/usr.bin/ssh/auth.c, Revision 1.113
1.113 ! djm 1: /* $OpenBSD: auth.c,v 1.112 2015/08/06 14:53:21 deraadt Exp $ */
1.1 markus 2: /*
1.19 deraadt 3: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.9 deraadt 4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1 markus 24: */
25:
1.62 stevesk 26: #include <sys/types.h>
27: #include <sys/stat.h>
1.22 markus 28:
1.70 stevesk 29: #include <errno.h>
1.79 dtucker 30: #include <fcntl.h>
1.22 markus 31: #include <libgen.h>
1.77 djm 32: #include <login_cap.h>
1.61 stevesk 33: #include <paths.h>
1.68 stevesk 34: #include <pwd.h>
1.69 stevesk 35: #include <stdarg.h>
1.74 stevesk 36: #include <stdio.h>
1.72 stevesk 37: #include <string.h>
1.80 djm 38: #include <unistd.h>
1.109 deraadt 39: #include <limits.h>
1.1 markus 40:
41: #include "xmalloc.h"
1.13 markus 42: #include "match.h"
1.14 markus 43: #include "groupaccess.h"
44: #include "log.h"
1.75 deraadt 45: #include "buffer.h"
1.106 millert 46: #include "misc.h"
1.1 markus 47: #include "servconf.h"
1.75 deraadt 48: #include "key.h"
49: #include "hostfile.h"
1.2 markus 50: #include "auth.h"
1.13 markus 51: #include "auth-options.h"
1.14 markus 52: #include "canohost.h"
1.24 markus 53: #include "uidswap.h"
1.42 markus 54: #include "packet.h"
1.75 deraadt 55: #ifdef GSSAPI
56: #include "ssh-gss.h"
57: #endif
1.85 djm 58: #include "authfile.h"
1.67 dtucker 59: #include "monitor_wrap.h"
1.107 djm 60: #include "authfile.h"
61: #include "ssherr.h"
1.103 djm 62: #include "compat.h"
1.2 markus 63:
1.1 markus 64: /* import */
65: extern ServerOptions options;
1.67 dtucker 66: extern int use_privsep;
1.1 markus 67:
1.42 markus 68: /* Debugging messages */
69: Buffer auth_debug;
70: int auth_debug_init;
71:
1.1 markus 72: /*
1.12 markus 73: * Check if the user is allowed to log in via ssh. If user is listed
74: * in DenyUsers or one of user's groups is listed in DenyGroups, false
75: * will be returned. If AllowUsers isn't empty and user isn't listed
76: * there, or if AllowGroups isn't empty and one of user's groups isn't
77: * listed there, false will be returned.
1.1 markus 78: * If the user's shell is not executable, false will be returned.
1.4 markus 79: * Otherwise true is returned.
1.1 markus 80: */
1.5 markus 81: int
1.1 markus 82: allowed_user(struct passwd * pw)
83: {
84: struct stat st;
1.35 markus 85: const char *hostname = NULL, *ipaddr = NULL;
1.60 djm 86: u_int i;
1.1 markus 87:
88: /* Shouldn't be called if pw is NULL, but better safe than sorry... */
1.12 markus 89: if (!pw || !pw->pw_name)
1.1 markus 90: return 0;
91:
1.7 deraadt 92: /*
1.84 djm 93: * Deny if shell does not exist or is not executable unless we
94: * are chrooting.
1.7 deraadt 95: */
1.84 djm 96: if (options.chroot_directory == NULL ||
97: strcasecmp(options.chroot_directory, "none") == 0) {
98: char *shell = xstrdup((pw->pw_shell[0] == '\0') ?
99: _PATH_BSHELL : pw->pw_shell); /* empty = /bin/sh */
100:
101: if (stat(shell, &st) != 0) {
102: logit("User %.100s not allowed because shell %.100s "
103: "does not exist", pw->pw_name, shell);
1.102 djm 104: free(shell);
1.84 djm 105: return 0;
106: }
107: if (S_ISREG(st.st_mode) == 0 ||
108: (st.st_mode & (S_IXOTH|S_IXUSR|S_IXGRP)) == 0) {
109: logit("User %.100s not allowed because shell %.100s "
110: "is not executable", pw->pw_name, shell);
1.102 djm 111: free(shell);
1.84 djm 112: return 0;
113: }
1.102 djm 114: free(shell);
1.34 stevesk 115: }
1.1 markus 116:
1.58 dtucker 117: if (options.num_deny_users > 0 || options.num_allow_users > 0 ||
118: options.num_deny_groups > 0 || options.num_allow_groups > 0) {
1.48 markus 119: hostname = get_canonical_hostname(options.use_dns);
1.35 markus 120: ipaddr = get_remote_ipaddr();
121: }
122:
1.1 markus 123: /* Return false if user is listed in DenyUsers */
124: if (options.num_deny_users > 0) {
125: for (i = 0; i < options.num_deny_users; i++)
1.39 markus 126: if (match_user(pw->pw_name, hostname, ipaddr,
1.34 stevesk 127: options.deny_users[i])) {
1.57 dtucker 128: logit("User %.100s from %.100s not allowed "
129: "because listed in DenyUsers",
130: pw->pw_name, hostname);
1.1 markus 131: return 0;
1.34 stevesk 132: }
1.1 markus 133: }
134: /* Return false if AllowUsers isn't empty and user isn't listed there */
135: if (options.num_allow_users > 0) {
136: for (i = 0; i < options.num_allow_users; i++)
1.39 markus 137: if (match_user(pw->pw_name, hostname, ipaddr,
1.26 markus 138: options.allow_users[i]))
1.1 markus 139: break;
140: /* i < options.num_allow_users iff we break for loop */
1.34 stevesk 141: if (i >= options.num_allow_users) {
1.57 dtucker 142: logit("User %.100s from %.100s not allowed because "
143: "not listed in AllowUsers", pw->pw_name, hostname);
1.1 markus 144: return 0;
1.34 stevesk 145: }
1.1 markus 146: }
147: if (options.num_deny_groups > 0 || options.num_allow_groups > 0) {
1.12 markus 148: /* Get the user's group access list (primary and supplementary) */
1.34 stevesk 149: if (ga_init(pw->pw_name, pw->pw_gid) == 0) {
1.57 dtucker 150: logit("User %.100s from %.100s not allowed because "
151: "not in any group", pw->pw_name, hostname);
1.1 markus 152: return 0;
1.34 stevesk 153: }
1.1 markus 154:
1.12 markus 155: /* Return false if one of user's groups is listed in DenyGroups */
156: if (options.num_deny_groups > 0)
157: if (ga_match(options.deny_groups,
158: options.num_deny_groups)) {
159: ga_free();
1.57 dtucker 160: logit("User %.100s from %.100s not allowed "
161: "because a group is listed in DenyGroups",
162: pw->pw_name, hostname);
1.1 markus 163: return 0;
1.12 markus 164: }
1.1 markus 165: /*
1.12 markus 166: * Return false if AllowGroups isn't empty and one of user's groups
1.1 markus 167: * isn't listed there
168: */
1.12 markus 169: if (options.num_allow_groups > 0)
170: if (!ga_match(options.allow_groups,
171: options.num_allow_groups)) {
172: ga_free();
1.57 dtucker 173: logit("User %.100s from %.100s not allowed "
174: "because none of user's groups are listed "
175: "in AllowGroups", pw->pw_name, hostname);
1.1 markus 176: return 0;
1.12 markus 177: }
178: ga_free();
1.1 markus 179: }
180: /* We found no reason not to let this user try to log on... */
181: return 1;
1.13 markus 182: }
183:
184: void
1.103 djm 185: auth_info(Authctxt *authctxt, const char *fmt, ...)
186: {
187: va_list ap;
188: int i;
189:
190: free(authctxt->info);
191: authctxt->info = NULL;
192:
193: va_start(ap, fmt);
194: i = vasprintf(&authctxt->info, fmt, ap);
195: va_end(ap);
196:
197: if (i < 0 || authctxt->info == NULL)
198: fatal("vasprintf failed");
199: }
200:
201: void
1.98 djm 202: auth_log(Authctxt *authctxt, int authenticated, int partial,
1.103 djm 203: const char *method, const char *submethod)
1.13 markus 204: {
205: void (*authlog) (const char *fmt,...) = verbose;
206: char *authmsg;
1.67 dtucker 207:
208: if (use_privsep && !mm_is_monitor() && !authctxt->postponed)
209: return;
1.13 markus 210:
211: /* Raise logging level */
212: if (authenticated == 1 ||
213: !authctxt->valid ||
1.54 dtucker 214: authctxt->failures >= options.max_authtries / 2 ||
1.13 markus 215: strcmp(method, "password") == 0)
1.47 itojun 216: authlog = logit;
1.13 markus 217:
218: if (authctxt->postponed)
219: authmsg = "Postponed";
1.98 djm 220: else if (partial)
221: authmsg = "Partial";
1.13 markus 222: else
223: authmsg = authenticated ? "Accepted" : "Failed";
224:
1.103 djm 225: authlog("%s %s%s%s for %s%.100s from %.200s port %d %s%s%s",
1.13 markus 226: authmsg,
227: method,
1.98 djm 228: submethod != NULL ? "/" : "", submethod == NULL ? "" : submethod,
1.56 markus 229: authctxt->valid ? "" : "invalid user ",
1.29 markus 230: authctxt->user,
1.13 markus 231: get_remote_ipaddr(),
232: get_remote_port(),
1.103 djm 233: compat20 ? "ssh2" : "ssh1",
234: authctxt->info != NULL ? ": " : "",
235: authctxt->info != NULL ? authctxt->info : "");
236: free(authctxt->info);
237: authctxt->info = NULL;
1.105 djm 238: }
239:
240: void
241: auth_maxtries_exceeded(Authctxt *authctxt)
242: {
1.110 djm 243: error("maximum authentication attempts exceeded for "
1.105 djm 244: "%s%.100s from %.200s port %d %s",
245: authctxt->valid ? "" : "invalid user ",
246: authctxt->user,
247: get_remote_ipaddr(),
248: get_remote_port(),
249: compat20 ? "ssh2" : "ssh1");
1.110 djm 250: packet_disconnect("Too many authentication failures");
1.105 djm 251: /* NOTREACHED */
1.13 markus 252: }
253:
254: /*
1.17 markus 255: * Check whether root logins are disallowed.
1.13 markus 256: */
257: int
1.98 djm 258: auth_root_allowed(const char *method)
1.13 markus 259: {
1.17 markus 260: switch (options.permit_root_login) {
261: case PERMIT_YES:
1.13 markus 262: return 1;
1.17 markus 263: case PERMIT_NO_PASSWD:
1.112 deraadt 264: if (strcmp(method, "publickey") == 0 ||
265: strcmp(method, "hostbased") == 0 ||
1.113 ! djm 266: strcmp(method, "gssapi-with-mic") == 0)
1.17 markus 267: return 1;
268: break;
269: case PERMIT_FORCED_ONLY:
270: if (forced_command) {
1.47 itojun 271: logit("Root login accepted for forced command.");
1.17 markus 272: return 1;
273: }
274: break;
1.13 markus 275: }
1.47 itojun 276: logit("ROOT LOGIN REFUSED FROM %.200s", get_remote_ipaddr());
1.22 markus 277: return 0;
278: }
279:
280:
281: /*
282: * Given a template and a passwd structure, build a filename
283: * by substituting % tokenised options. Currently, %% becomes '%',
284: * %h becomes the home directory and %u the username.
285: *
286: * This returns a buffer allocated by xmalloc.
287: */
1.93 djm 288: char *
1.59 djm 289: expand_authorized_keys(const char *filename, struct passwd *pw)
1.22 markus 290: {
1.109 deraadt 291: char *file, ret[PATH_MAX];
1.65 djm 292: int i;
1.22 markus 293:
1.59 djm 294: file = percent_expand(filename, "h", pw->pw_dir,
295: "u", pw->pw_name, (char *)NULL);
1.22 markus 296:
297: /*
298: * Ensure that filename starts anchored. If not, be backward
299: * compatible and prepend the '%h/'
300: */
1.59 djm 301: if (*file == '/')
302: return (file);
303:
1.65 djm 304: i = snprintf(ret, sizeof(ret), "%s/%s", pw->pw_dir, file);
305: if (i < 0 || (size_t)i >= sizeof(ret))
1.59 djm 306: fatal("expand_authorized_keys: path too long");
1.102 djm 307: free(file);
1.65 djm 308: return (xstrdup(ret));
1.22 markus 309: }
1.24 markus 310:
1.87 djm 311: char *
312: authorized_principals_file(struct passwd *pw)
313: {
1.111 djm 314: if (options.authorized_principals_file == NULL)
1.87 djm 315: return NULL;
316: return expand_authorized_keys(options.authorized_principals_file, pw);
317: }
318:
1.24 markus 319: /* return ok if key exists in sysfile or userfile */
320: HostStatus
321: check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host,
322: const char *sysfile, const char *userfile)
323: {
324: char *user_hostfile;
325: struct stat st;
1.30 stevesk 326: HostStatus host_status;
1.91 djm 327: struct hostkeys *hostkeys;
328: const struct hostkey_entry *found;
1.24 markus 329:
1.91 djm 330: hostkeys = init_hostkeys();
331: load_hostkeys(hostkeys, host, sysfile);
332: if (userfile != NULL) {
1.24 markus 333: user_hostfile = tilde_expand_filename(userfile, pw->pw_uid);
334: if (options.strict_modes &&
335: (stat(user_hostfile, &st) == 0) &&
336: ((st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
1.31 deraadt 337: (st.st_mode & 022) != 0)) {
1.47 itojun 338: logit("Authentication refused for %.100s: "
1.24 markus 339: "bad owner or modes for %.200s",
340: pw->pw_name, user_hostfile);
1.88 djm 341: auth_debug_add("Ignored %.200s: bad ownership or modes",
342: user_hostfile);
1.24 markus 343: } else {
344: temporarily_use_uid(pw);
1.91 djm 345: load_hostkeys(hostkeys, host, user_hostfile);
1.24 markus 346: restore_uid();
347: }
1.102 djm 348: free(user_hostfile);
1.24 markus 349: }
1.91 djm 350: host_status = check_key_in_hostkeys(hostkeys, key, &found);
351: if (host_status == HOST_REVOKED)
352: error("WARNING: revoked key for %s attempted authentication",
353: found->host);
354: else if (host_status == HOST_OK)
355: debug("%s: key for %s found at %s:%ld", __func__,
356: found->host, found->file, found->line);
357: else
358: debug("%s: key for host %s not found", __func__, host);
359:
360: free_hostkeys(hostkeys);
1.24 markus 361:
362: return host_status;
363: }
364:
1.22 markus 365: /*
1.97 djm 366: * Check a given path for security. This is defined as all components
1.44 stevesk 367: * of the path to the file must be owned by either the owner of
1.23 markus 368: * of the file or root and no directories must be group or world writable.
1.22 markus 369: *
370: * XXX Should any specific check be done for sym links ?
371: *
1.101 dtucker 372: * Takes a file name, its stat information (preferably from fstat() to
1.97 djm 373: * avoid races), the uid of the expected owner, their home directory and an
1.22 markus 374: * error buffer plus max size as arguments.
375: *
376: * Returns 0 on success and -1 on failure
377: */
1.97 djm 378: int
379: auth_secure_path(const char *name, struct stat *stp, const char *pw_dir,
380: uid_t uid, char *err, size_t errlen)
1.22 markus 381: {
1.109 deraadt 382: char buf[PATH_MAX], homedir[PATH_MAX];
1.22 markus 383: char *cp;
1.46 markus 384: int comparehome = 0;
1.22 markus 385: struct stat st;
386:
1.97 djm 387: if (realpath(name, buf) == NULL) {
388: snprintf(err, errlen, "realpath %s failed: %s", name,
1.22 markus 389: strerror(errno));
390: return -1;
391: }
1.97 djm 392: if (pw_dir != NULL && realpath(pw_dir, homedir) != NULL)
1.46 markus 393: comparehome = 1;
1.22 markus 394:
1.97 djm 395: if (!S_ISREG(stp->st_mode)) {
396: snprintf(err, errlen, "%s is not a regular file", buf);
397: return -1;
398: }
399: if ((stp->st_uid != 0 && stp->st_uid != uid) ||
400: (stp->st_mode & 022) != 0) {
1.22 markus 401: snprintf(err, errlen, "bad ownership or modes for file %s",
402: buf);
403: return -1;
404: }
405:
406: /* for each component of the canonical path, walking upwards */
407: for (;;) {
408: if ((cp = dirname(buf)) == NULL) {
409: snprintf(err, errlen, "dirname() failed");
410: return -1;
411: }
412: strlcpy(buf, cp, sizeof(buf));
1.25 provos 413:
1.22 markus 414: if (stat(buf, &st) < 0 ||
415: (st.st_uid != 0 && st.st_uid != uid) ||
416: (st.st_mode & 022) != 0) {
1.31 deraadt 417: snprintf(err, errlen,
1.22 markus 418: "bad ownership or modes for directory %s", buf);
419: return -1;
420: }
421:
1.82 dtucker 422: /* If are past the homedir then we can stop */
1.94 djm 423: if (comparehome && strcmp(homedir, buf) == 0)
1.27 markus 424: break;
1.94 djm 425:
1.22 markus 426: /*
427: * dirname should always complete with a "/" path,
428: * but we can be paranoid and check for "." too
429: */
430: if ((strcmp("/", buf) == 0) || (strcmp(".", buf) == 0))
431: break;
432: }
1.17 markus 433: return 0;
1.97 djm 434: }
435:
436: /*
437: * Version of secure_path() that accepts an open file descriptor to
438: * avoid races.
439: *
440: * Returns 0 on success and -1 on failure
441: */
442: static int
443: secure_filename(FILE *f, const char *file, struct passwd *pw,
444: char *err, size_t errlen)
445: {
446: struct stat st;
447:
448: /* check the open file to avoid races */
449: if (fstat(fileno(f), &st) < 0) {
450: snprintf(err, errlen, "cannot stat file %s: %s",
1.99 dtucker 451: file, strerror(errno));
1.97 djm 452: return -1;
453: }
454: return auth_secure_path(file, &st, pw->pw_dir, pw->pw_uid, err, errlen);
1.79 dtucker 455: }
456:
1.87 djm 457: static FILE *
458: auth_openfile(const char *file, struct passwd *pw, int strict_modes,
459: int log_missing, char *file_type)
1.79 dtucker 460: {
461: char line[1024];
462: struct stat st;
463: int fd;
464: FILE *f;
465:
1.81 dtucker 466: if ((fd = open(file, O_RDONLY|O_NONBLOCK)) == -1) {
1.87 djm 467: if (log_missing || errno != ENOENT)
468: debug("Could not open %s '%s': %s", file_type, file,
1.81 dtucker 469: strerror(errno));
1.79 dtucker 470: return NULL;
1.81 dtucker 471: }
1.79 dtucker 472:
473: if (fstat(fd, &st) < 0) {
474: close(fd);
475: return NULL;
476: }
477: if (!S_ISREG(st.st_mode)) {
1.87 djm 478: logit("User %s %s %s is not a regular file",
479: pw->pw_name, file_type, file);
1.79 dtucker 480: close(fd);
481: return NULL;
482: }
483: unset_nonblock(fd);
484: if ((f = fdopen(fd, "r")) == NULL) {
485: close(fd);
486: return NULL;
487: }
1.90 djm 488: if (strict_modes &&
1.79 dtucker 489: secure_filename(f, file, pw, line, sizeof(line)) != 0) {
490: fclose(f);
491: logit("Authentication refused: %s", line);
1.88 djm 492: auth_debug_add("Ignored %s: %s", file_type, line);
1.79 dtucker 493: return NULL;
494: }
495:
496: return f;
1.87 djm 497: }
498:
499:
500: FILE *
501: auth_openkeyfile(const char *file, struct passwd *pw, int strict_modes)
502: {
503: return auth_openfile(file, pw, strict_modes, 1, "authorized keys");
504: }
505:
506: FILE *
507: auth_openprincipals(const char *file, struct passwd *pw, int strict_modes)
508: {
509: return auth_openfile(file, pw, strict_modes, 0,
510: "authorized principals");
1.37 provos 511: }
512:
513: struct passwd *
514: getpwnamallow(const char *user)
515: {
1.38 provos 516: extern login_cap_t *lc;
517: auth_session_t *as;
1.37 provos 518: struct passwd *pw;
1.96 dtucker 519: struct connection_info *ci = get_connection_info(1, options.use_dns);
1.71 dtucker 520:
1.96 dtucker 521: ci->user = user;
522: parse_server_match_config(&options, ci);
1.37 provos 523:
524: pw = getpwnam(user);
1.45 stevesk 525: if (pw == NULL) {
1.55 markus 526: logit("Invalid user %.100s from %.100s",
1.45 stevesk 527: user, get_remote_ipaddr());
528: return (NULL);
529: }
530: if (!allowed_user(pw))
1.38 provos 531: return (NULL);
532: if ((lc = login_getclass(pw->pw_class)) == NULL) {
533: debug("unable to get login class: %s", user);
534: return (NULL);
535: }
536: if ((as = auth_open()) == NULL || auth_setpwd(as, pw) != 0 ||
1.43 millert 537: auth_approval(as, lc, pw->pw_name, "ssh") <= 0) {
1.38 provos 538: debug("Approval failure for %s", user);
1.37 provos 539: pw = NULL;
1.38 provos 540: }
541: if (as != NULL)
542: auth_close(as);
1.41 markus 543: if (pw != NULL)
544: return (pwcopy(pw));
545: return (NULL);
1.85 djm 546: }
547:
548: /* Returns 1 if key is revoked by revoked_keys_file, 0 otherwise */
549: int
550: auth_key_is_revoked(Key *key)
551: {
1.107 djm 552: char *fp = NULL;
553: int r;
1.85 djm 554:
555: if (options.revoked_keys_file == NULL)
556: return 0;
1.108 djm 557: if ((fp = sshkey_fingerprint(key, options.fingerprint_hash,
558: SSH_FP_DEFAULT)) == NULL) {
1.107 djm 559: r = SSH_ERR_ALLOC_FAIL;
560: error("%s: fingerprint key: %s", __func__, ssh_err(r));
561: goto out;
562: }
563:
564: r = sshkey_check_revoked(key, options.revoked_keys_file);
565: switch (r) {
1.100 djm 566: case 0:
1.107 djm 567: break; /* not revoked */
568: case SSH_ERR_KEY_REVOKED:
569: error("Authentication key %s %s revoked by file %s",
570: sshkey_type(key), fp, options.revoked_keys_file);
571: goto out;
1.100 djm 572: default:
1.107 djm 573: error("Error checking authentication key %s %s in "
574: "revoked keys file %s: %s", sshkey_type(key), fp,
575: options.revoked_keys_file, ssh_err(r));
576: goto out;
1.100 djm 577: }
1.107 djm 578:
579: /* Success */
580: r = 0;
581:
582: out:
583: free(fp);
584: return r == 0 ? 0 : 1;
1.42 markus 585: }
586:
587: void
588: auth_debug_add(const char *fmt,...)
589: {
590: char buf[1024];
591: va_list args;
592:
593: if (!auth_debug_init)
594: return;
595:
596: va_start(args, fmt);
597: vsnprintf(buf, sizeof(buf), fmt, args);
598: va_end(args);
599: buffer_put_cstring(&auth_debug, buf);
600: }
601:
602: void
603: auth_debug_send(void)
604: {
605: char *msg;
606:
607: if (!auth_debug_init)
608: return;
609: while (buffer_len(&auth_debug)) {
610: msg = buffer_get_string(&auth_debug, NULL);
611: packet_send_debug("%s", msg);
1.102 djm 612: free(msg);
1.42 markus 613: }
614: }
615:
616: void
617: auth_debug_reset(void)
618: {
619: if (auth_debug_init)
620: buffer_clear(&auth_debug);
621: else {
622: buffer_init(&auth_debug);
623: auth_debug_init = 1;
624: }
1.49 markus 625: }
626:
627: struct passwd *
628: fakepw(void)
629: {
630: static struct passwd fake;
631:
632: memset(&fake, 0, sizeof(fake));
633: fake.pw_name = "NOUSER";
634: fake.pw_passwd =
1.51 djm 635: "$2a$06$r3.juUaHZDlIbQaO2dS9FuYxL1W9M81R1Tc92PoSNmzvpEqLkLGrK";
1.49 markus 636: fake.pw_gecos = "NOUSER";
1.53 deraadt 637: fake.pw_uid = (uid_t)-1;
638: fake.pw_gid = (gid_t)-1;
1.49 markus 639: fake.pw_class = "";
640: fake.pw_dir = "/nonexist";
641: fake.pw_shell = "/nonexist";
642:
643: return (&fake);
1.1 markus 644: }
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