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7368a6c8 | 1 | /* |
2 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
3 | * All rights reserved | |
bcbf86ec | 4 | * |
5 | * As far as I am concerned, the code I have written for this software | |
6 | * can be used freely for any purpose. Any derived versions of this | |
7 | * software must be clearly marked as such, and if the derived work is | |
8 | * incompatible with the protocol description in the RFC file, it must be | |
9 | * called by a name other than "ssh" or "Secure Shell". | |
10 | * | |
e78a59f5 | 11 | * SSH2 support by Markus Friedl. |
a96070d4 | 12 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 13 | * |
14 | * Redistribution and use in source and binary forms, with or without | |
15 | * modification, are permitted provided that the following conditions | |
16 | * are met: | |
17 | * 1. Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * 2. Redistributions in binary form must reproduce the above copyright | |
20 | * notice, this list of conditions and the following disclaimer in the | |
21 | * documentation and/or other materials provided with the distribution. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
24 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
26 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
e78a59f5 | 33 | */ |
7368a6c8 | 34 | |
35 | #include "includes.h" | |
74860245 | 36 | RCSID("$OpenBSD: session.c,v 1.111 2001/12/06 18:09:23 stevesk Exp $"); |
7368a6c8 | 37 | |
7368a6c8 | 38 | #include "ssh.h" |
42f11eb2 | 39 | #include "ssh1.h" |
40 | #include "ssh2.h" | |
41 | #include "xmalloc.h" | |
1729c161 | 42 | #include "sshpty.h" |
7368a6c8 | 43 | #include "packet.h" |
44 | #include "buffer.h" | |
7368a6c8 | 45 | #include "mpaux.h" |
7368a6c8 | 46 | #include "uidswap.h" |
47 | #include "compat.h" | |
a5efa1bb | 48 | #include "channels.h" |
e78a59f5 | 49 | #include "bufaux.h" |
e78a59f5 | 50 | #include "auth.h" |
38c295d6 | 51 | #include "auth-options.h" |
42f11eb2 | 52 | #include "pathnames.h" |
53 | #include "log.h" | |
54 | #include "servconf.h" | |
1729c161 | 55 | #include "sshlogin.h" |
42f11eb2 | 56 | #include "serverloop.h" |
57 | #include "canohost.h" | |
5ca51e19 | 58 | #include "session.h" |
e78a59f5 | 59 | |
3206bb3b | 60 | #ifdef WITH_IRIX_PROJECT |
61 | #include <proj.h> | |
62 | #endif /* WITH_IRIX_PROJECT */ | |
d287c664 | 63 | #ifdef WITH_IRIX_JOBS |
64 | #include <sys/resource.h> | |
2b87da3b | 65 | #endif |
260d427b | 66 | #ifdef WITH_IRIX_AUDIT |
67 | #include <sat.h> | |
68 | #endif /* WITH_IRIX_AUDIT */ | |
3206bb3b | 69 | |
089fbbd2 | 70 | #if defined(HAVE_USERSEC_H) |
71 | #include <usersec.h> | |
72 | #endif | |
73 | ||
3c62e7eb | 74 | #ifdef HAVE_CYGWIN |
75 | #include <windows.h> | |
76 | #include <sys/cygwin.h> | |
77 | #define is_winnt (GetVersion() < 0x80000000) | |
78 | #endif | |
79 | ||
3fcce26c | 80 | /* AIX limits */ |
81 | #if defined(HAVE_GETUSERATTR) && !defined(S_UFSIZE_HARD) && defined(S_UFSIZE) | |
2a2cb9e7 | 82 | # define S_UFSIZE_HARD S_UFSIZE "_hard" |
83 | # define S_UCPU_HARD S_UCPU "_hard" | |
84 | # define S_UDATA_HARD S_UDATA "_hard" | |
85 | # define S_USTACK_HARD S_USTACK "_hard" | |
86 | # define S_URSS_HARD S_URSS "_hard" | |
87 | # define S_UCORE_HARD S_UCORE "_hard" | |
88 | # define S_UNOFILE_HARD S_UNOFILE "_hard" | |
3fcce26c | 89 | #endif |
90 | ||
8a968c25 | 91 | #ifdef _AIX |
92 | # include <uinfo.h> | |
93 | #endif | |
94 | ||
7368a6c8 | 95 | /* types */ |
96 | ||
97 | #define TTYSZ 64 | |
98 | typedef struct Session Session; | |
99 | struct Session { | |
100 | int used; | |
101 | int self; | |
ced49be2 | 102 | struct passwd *pw; |
103 | Authctxt *authctxt; | |
7368a6c8 | 104 | pid_t pid; |
105 | /* tty */ | |
106 | char *term; | |
107 | int ptyfd, ttyfd, ptymaster; | |
108 | int row, col, xpixel, ypixel; | |
109 | char tty[TTYSZ]; | |
110 | /* X11 */ | |
c9d0ad9b | 111 | int display_number; |
7368a6c8 | 112 | char *display; |
113 | int screen; | |
c9d0ad9b | 114 | char *auth_display[2]; |
7368a6c8 | 115 | char *auth_proto; |
116 | char *auth_data; | |
0b242b12 | 117 | int single_connection; |
7368a6c8 | 118 | /* proto 2 */ |
119 | int chanid; | |
e5d7a405 | 120 | int is_subsystem; |
7368a6c8 | 121 | }; |
122 | ||
123 | /* func */ | |
124 | ||
125 | Session *session_new(void); | |
9c328529 | 126 | void session_set_fds(Session *, int, int, int); |
127 | static void session_pty_cleanup(void *); | |
128 | void session_proctitle(Session *); | |
129 | int session_setup_x11fwd(Session *); | |
130 | void do_exec_pty(Session *, const char *); | |
131 | void do_exec_no_pty(Session *, const char *); | |
132 | void do_exec(Session *, const char *); | |
133 | void do_login(Session *, const char *); | |
8a9ac95d | 134 | #ifdef LOGIN_NEEDS_UTMPX |
135 | static void do_pre_login(Session *s); | |
136 | #endif | |
9c328529 | 137 | void do_child(Session *, const char *); |
f2c2fd71 | 138 | void do_motd(void); |
9c328529 | 139 | int check_quietlogin(Session *, const char *); |
7368a6c8 | 140 | |
396c147e | 141 | static void do_authenticated1(Authctxt *); |
142 | static void do_authenticated2(Authctxt *); | |
9c328529 | 143 | |
396c147e | 144 | static void session_close(Session *); |
145 | static int session_pty_req(Session *); | |
bb5639fe | 146 | |
7368a6c8 | 147 | /* import */ |
148 | extern ServerOptions options; | |
149 | extern char *__progname; | |
150 | extern int log_stderr; | |
151 | extern int debug_flag; | |
1e3b8b07 | 152 | extern u_int utmp_len; |
089fbbd2 | 153 | extern int startup_pipe; |
e78e738a | 154 | extern void destroy_sensitive_data(void); |
089fbbd2 | 155 | |
b5e300c2 | 156 | /* original command from peer. */ |
c95add71 | 157 | const char *original_command = NULL; |
b5e300c2 | 158 | |
7368a6c8 | 159 | /* data */ |
160 | #define MAX_SESSIONS 10 | |
161 | Session sessions[MAX_SESSIONS]; | |
c5d85828 | 162 | |
c1ef8333 | 163 | #ifdef WITH_AIXAUTHENTICATE |
c1ef8333 | 164 | char *aixloginmsg; |
165 | #endif /* WITH_AIXAUTHENTICATE */ | |
7368a6c8 | 166 | |
2e73a022 | 167 | #ifdef HAVE_LOGIN_CAP |
168 | static login_cap_t *lc; | |
169 | #endif | |
170 | ||
bb5639fe | 171 | void |
172 | do_authenticated(Authctxt *authctxt) | |
173 | { | |
174 | /* | |
175 | * Cancel the alarm we set to limit the time taken for | |
176 | * authentication. | |
177 | */ | |
178 | alarm(0); | |
179 | if (startup_pipe != -1) { | |
180 | close(startup_pipe); | |
181 | startup_pipe = -1; | |
182 | } | |
183 | #if defined(HAVE_LOGIN_CAP) && defined(HAVE_PW_CLASS_IN_PASSWD) | |
184 | if ((lc = login_getclass(authctxt->pw->pw_class)) == NULL) { | |
185 | error("unable to get login class"); | |
186 | return; | |
187 | } | |
e78e738a | 188 | #ifdef BSD_AUTH |
189 | if (auth_approval(NULL, lc, authctxt->pw->pw_name, "ssh") <= 0) { | |
190 | packet_disconnect("Approval failure for %s", | |
191 | authctxt->pw->pw_name); | |
192 | } | |
193 | #endif | |
bb5639fe | 194 | #endif |
19e810f6 | 195 | #ifdef WITH_AIXAUTHENTICATE |
196 | /* We don't have a pty yet, so just label the line as "ssh" */ | |
197 | if (loginsuccess(authctxt->user, | |
198 | get_canonical_hostname(options.reverse_mapping_check), | |
199 | "ssh", &aixloginmsg) < 0) | |
200 | aixloginmsg = NULL; | |
201 | #endif /* WITH_AIXAUTHENTICATE */ | |
202 | ||
bb5639fe | 203 | /* setup the channel layer */ |
204 | if (!no_port_forwarding_flag && options.allow_tcp_forwarding) | |
205 | channel_permit_all_opens(); | |
206 | ||
207 | if (compat20) | |
208 | do_authenticated2(authctxt); | |
209 | else | |
210 | do_authenticated1(authctxt); | |
e4f7282d | 211 | |
b44de2b1 | 212 | /* remove agent socket */ |
e4f7282d | 213 | if (auth_get_socket_name()) |
f0f32b8e | 214 | auth_sock_cleanup_proc(authctxt->pw); |
ced49be2 | 215 | #ifdef KRB4 |
216 | if (options.kerberos_ticket_cleanup) | |
217 | krb4_cleanup_proc(authctxt); | |
218 | #endif | |
219 | #ifdef KRB5 | |
220 | if (options.kerberos_ticket_cleanup) | |
221 | krb5_cleanup_proc(authctxt); | |
222 | #endif | |
bb5639fe | 223 | } |
224 | ||
7368a6c8 | 225 | /* |
226 | * Prepares for an interactive session. This is called after the user has | |
227 | * been successfully authenticated. During this message exchange, pseudo | |
228 | * terminals are allocated, X11, TCP/IP, and authentication agent forwardings | |
229 | * are requested, etc. | |
230 | */ | |
396c147e | 231 | static void |
bb5639fe | 232 | do_authenticated1(Authctxt *authctxt) |
7368a6c8 | 233 | { |
234 | Session *s; | |
7368a6c8 | 235 | char *command; |
653d5f86 | 236 | int success, type, plen, screen_flag; |
bb5639fe | 237 | int compression_level = 0, enable_compression_after_reply = 0; |
1e3b8b07 | 238 | u_int proto_len, data_len, dlen; |
7368a6c8 | 239 | |
240 | s = session_new(); | |
ced49be2 | 241 | s->authctxt = authctxt; |
bb5639fe | 242 | s->pw = authctxt->pw; |
2e73a022 | 243 | |
7368a6c8 | 244 | /* |
245 | * We stay in this loop until the client requests to execute a shell | |
246 | * or a command. | |
247 | */ | |
248 | for (;;) { | |
bb5639fe | 249 | success = 0; |
7368a6c8 | 250 | |
251 | /* Get a packet from the client. */ | |
252 | type = packet_read(&plen); | |
253 | ||
254 | /* Process the packet. */ | |
255 | switch (type) { | |
256 | case SSH_CMSG_REQUEST_COMPRESSION: | |
257 | packet_integrity_check(plen, 4, type); | |
258 | compression_level = packet_get_int(); | |
259 | if (compression_level < 1 || compression_level > 9) { | |
260 | packet_send_debug("Received illegal compression level %d.", | |
261 | compression_level); | |
262 | break; | |
263 | } | |
264 | /* Enable compression after we have responded with SUCCESS. */ | |
265 | enable_compression_after_reply = 1; | |
266 | success = 1; | |
267 | break; | |
268 | ||
269 | case SSH_CMSG_REQUEST_PTY: | |
653d5f86 | 270 | success = session_pty_req(s); |
7368a6c8 | 271 | break; |
272 | ||
273 | case SSH_CMSG_X11_REQUEST_FORWARDING: | |
7368a6c8 | 274 | s->auth_proto = packet_get_string(&proto_len); |
275 | s->auth_data = packet_get_string(&data_len); | |
7368a6c8 | 276 | |
2af09193 | 277 | screen_flag = packet_get_protocol_flags() & |
278 | SSH_PROTOFLAG_SCREEN_NUMBER; | |
279 | debug2("SSH_PROTOFLAG_SCREEN_NUMBER: %d", screen_flag); | |
280 | ||
281 | if (packet_remaining() == 4) { | |
282 | if (!screen_flag) | |
283 | debug2("Buggy client: " | |
284 | "X11 screen flag missing"); | |
7368a6c8 | 285 | s->screen = packet_get_int(); |
c8b058b4 | 286 | } else { |
7368a6c8 | 287 | s->screen = 0; |
c8b058b4 | 288 | } |
8dcd9d5c | 289 | packet_done(); |
290 | success = session_setup_x11fwd(s); | |
291 | if (!success) { | |
292 | xfree(s->auth_proto); | |
293 | xfree(s->auth_data); | |
1500bcdd | 294 | s->auth_proto = NULL; |
295 | s->auth_data = NULL; | |
7368a6c8 | 296 | } |
7368a6c8 | 297 | break; |
7368a6c8 | 298 | |
299 | case SSH_CMSG_AGENT_REQUEST_FORWARDING: | |
300 | if (no_agent_forwarding_flag || compat13) { | |
301 | debug("Authentication agent forwarding not permitted for this authentication."); | |
302 | break; | |
303 | } | |
304 | debug("Received authentication agent forwarding request."); | |
bb5639fe | 305 | success = auth_input_request_forwarding(s->pw); |
7368a6c8 | 306 | break; |
307 | ||
308 | case SSH_CMSG_PORT_FORWARD_REQUEST: | |
309 | if (no_port_forwarding_flag) { | |
310 | debug("Port forwarding not permitted for this authentication."); | |
311 | break; | |
312 | } | |
33de75a3 | 313 | if (!options.allow_tcp_forwarding) { |
314 | debug("Port forwarding not permitted."); | |
315 | break; | |
316 | } | |
7368a6c8 | 317 | debug("Received TCP/IP port forwarding request."); |
bb5639fe | 318 | channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports); |
7368a6c8 | 319 | success = 1; |
320 | break; | |
321 | ||
322 | case SSH_CMSG_MAX_PACKET_SIZE: | |
323 | if (packet_set_maxsize(packet_get_int()) > 0) | |
324 | success = 1; | |
325 | break; | |
ced49be2 | 326 | |
327 | #if defined(AFS) || defined(KRB5) | |
328 | case SSH_CMSG_HAVE_KERBEROS_TGT: | |
329 | if (!options.kerberos_tgt_passing) { | |
330 | verbose("Kerberos TGT passing disabled."); | |
331 | } else { | |
332 | char *kdata = packet_get_string(&dlen); | |
333 | packet_integrity_check(plen, 4 + dlen, type); | |
334 | ||
335 | /* XXX - 0x41, see creds_to_radix version */ | |
336 | if (kdata[0] != 0x41) { | |
337 | #ifdef KRB5 | |
338 | krb5_data tgt; | |
339 | tgt.data = kdata; | |
340 | tgt.length = dlen; | |
341 | ||
342 | if (auth_krb5_tgt(s->authctxt, &tgt)) | |
343 | success = 1; | |
344 | else | |
345 | verbose("Kerberos v5 TGT refused for %.100s", s->authctxt->user); | |
346 | #endif /* KRB5 */ | |
347 | } else { | |
348 | #ifdef AFS | |
349 | if (auth_krb4_tgt(s->authctxt, kdata)) | |
350 | success = 1; | |
351 | else | |
352 | verbose("Kerberos v4 TGT refused for %.100s", s->authctxt->user); | |
353 | #endif /* AFS */ | |
354 | } | |
355 | xfree(kdata); | |
356 | } | |
357 | break; | |
358 | #endif /* AFS || KRB5 */ | |
359 | ||
360 | #ifdef AFS | |
361 | case SSH_CMSG_HAVE_AFS_TOKEN: | |
362 | if (!options.afs_token_passing || !k_hasafs()) { | |
363 | verbose("AFS token passing disabled."); | |
364 | } else { | |
365 | /* Accept AFS token. */ | |
366 | char *token = packet_get_string(&dlen); | |
367 | packet_integrity_check(plen, 4 + dlen, type); | |
368 | ||
369 | if (auth_afs_token(s->authctxt, token)) | |
370 | success = 1; | |
371 | else | |
372 | verbose("AFS token refused for %.100s", | |
373 | s->authctxt->user); | |
374 | xfree(token); | |
375 | } | |
376 | break; | |
377 | #endif /* AFS */ | |
7368a6c8 | 378 | |
379 | case SSH_CMSG_EXEC_SHELL: | |
380 | case SSH_CMSG_EXEC_CMD: | |
7368a6c8 | 381 | if (type == SSH_CMSG_EXEC_CMD) { |
382 | command = packet_get_string(&dlen); | |
383 | debug("Exec command '%.500s'", command); | |
c95add71 | 384 | do_exec(s, command); |
385 | xfree(command); | |
7368a6c8 | 386 | } else { |
c95add71 | 387 | do_exec(s, NULL); |
7368a6c8 | 388 | } |
c95add71 | 389 | packet_done(); |
fc2a1d28 | 390 | session_close(s); |
7368a6c8 | 391 | return; |
392 | ||
393 | default: | |
394 | /* | |
395 | * Any unknown messages in this phase are ignored, | |
396 | * and a failure message is returned. | |
397 | */ | |
398 | log("Unknown packet type received after authentication: %d", type); | |
399 | } | |
400 | packet_start(success ? SSH_SMSG_SUCCESS : SSH_SMSG_FAILURE); | |
401 | packet_send(); | |
402 | packet_write_wait(); | |
403 | ||
404 | /* Enable compression now that we have replied if appropriate. */ | |
405 | if (enable_compression_after_reply) { | |
406 | enable_compression_after_reply = 0; | |
407 | packet_start_compression(compression_level); | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
412 | /* | |
413 | * This is called to fork and execute a command when we have no tty. This | |
414 | * will call do_child from the child, and server_loop from the parent after | |
415 | * setting up file descriptors and such. | |
416 | */ | |
6ae2364d | 417 | void |
65068d16 | 418 | do_exec_no_pty(Session *s, const char *command) |
7368a6c8 | 419 | { |
420 | int pid; | |
421 | ||
422 | #ifdef USE_PIPES | |
423 | int pin[2], pout[2], perr[2]; | |
424 | /* Allocate pipes for communicating with the program. */ | |
425 | if (pipe(pin) < 0 || pipe(pout) < 0 || pipe(perr) < 0) | |
426 | packet_disconnect("Could not create pipes: %.100s", | |
427 | strerror(errno)); | |
428 | #else /* USE_PIPES */ | |
429 | int inout[2], err[2]; | |
430 | /* Uses socket pairs to communicate with the program. */ | |
431 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) < 0 || | |
432 | socketpair(AF_UNIX, SOCK_STREAM, 0, err) < 0) | |
433 | packet_disconnect("Could not create socket pairs: %.100s", | |
434 | strerror(errno)); | |
435 | #endif /* USE_PIPES */ | |
436 | if (s == NULL) | |
437 | fatal("do_exec_no_pty: no session"); | |
438 | ||
1d1ffb87 | 439 | session_proctitle(s); |
7368a6c8 | 440 | |
b19d61d7 | 441 | #if defined(USE_PAM) |
78220944 | 442 | do_pam_session(s->pw->pw_name, NULL); |
9afbfcfa | 443 | do_pam_setcred(1); |
7eb73cc1 | 444 | if (is_pam_password_change_required()) |
445 | packet_disconnect("Password change required but no " | |
446 | "TTY available"); | |
266140a8 | 447 | #endif /* USE_PAM */ |
448 | ||
7368a6c8 | 449 | /* Fork the child. */ |
450 | if ((pid = fork()) == 0) { | |
451 | /* Child. Reinitialize the log since the pid has changed. */ | |
452 | log_init(__progname, options.log_level, options.log_facility, log_stderr); | |
453 | ||
454 | /* | |
455 | * Create a new session and process group since the 4.4BSD | |
456 | * setlogin() affects the entire process group. | |
457 | */ | |
458 | if (setsid() < 0) | |
459 | error("setsid failed: %.100s", strerror(errno)); | |
460 | ||
461 | #ifdef USE_PIPES | |
462 | /* | |
463 | * Redirect stdin. We close the parent side of the socket | |
464 | * pair, and make the child side the standard input. | |
465 | */ | |
466 | close(pin[1]); | |
467 | if (dup2(pin[0], 0) < 0) | |
468 | perror("dup2 stdin"); | |
469 | close(pin[0]); | |
470 | ||
471 | /* Redirect stdout. */ | |
472 | close(pout[0]); | |
473 | if (dup2(pout[1], 1) < 0) | |
474 | perror("dup2 stdout"); | |
475 | close(pout[1]); | |
476 | ||
477 | /* Redirect stderr. */ | |
478 | close(perr[0]); | |
479 | if (dup2(perr[1], 2) < 0) | |
480 | perror("dup2 stderr"); | |
481 | close(perr[1]); | |
482 | #else /* USE_PIPES */ | |
483 | /* | |
484 | * Redirect stdin, stdout, and stderr. Stdin and stdout will | |
485 | * use the same socket, as some programs (particularly rdist) | |
486 | * seem to depend on it. | |
487 | */ | |
488 | close(inout[1]); | |
489 | close(err[1]); | |
490 | if (dup2(inout[0], 0) < 0) /* stdin */ | |
491 | perror("dup2 stdin"); | |
492 | if (dup2(inout[0], 1) < 0) /* stdout. Note: same socket as stdin. */ | |
493 | perror("dup2 stdout"); | |
494 | if (dup2(err[0], 2) < 0) /* stderr */ | |
495 | perror("dup2 stderr"); | |
496 | #endif /* USE_PIPES */ | |
497 | ||
498 | /* Do processing for the child (exec command etc). */ | |
56b3e9ce | 499 | do_child(s, command); |
7368a6c8 | 500 | /* NOTREACHED */ |
501 | } | |
3c62e7eb | 502 | #ifdef HAVE_CYGWIN |
503 | if (is_winnt) | |
504 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
505 | #endif | |
7368a6c8 | 506 | if (pid < 0) |
507 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
508 | s->pid = pid; | |
b5c334cc | 509 | /* Set interactive/non-interactive mode. */ |
510 | packet_set_interactive(s->display != NULL); | |
7368a6c8 | 511 | #ifdef USE_PIPES |
512 | /* We are the parent. Close the child sides of the pipes. */ | |
513 | close(pin[0]); | |
514 | close(pout[1]); | |
515 | close(perr[1]); | |
516 | ||
e78a59f5 | 517 | if (compat20) { |
e5d7a405 | 518 | session_set_fds(s, pin[1], pout[0], s->is_subsystem ? -1 : perr[0]); |
e78a59f5 | 519 | } else { |
520 | /* Enter the interactive session. */ | |
521 | server_loop(pid, pin[1], pout[0], perr[0]); | |
e5d7a405 | 522 | /* server_loop has closed pin[1], pout[0], and perr[0]. */ |
e78a59f5 | 523 | } |
7368a6c8 | 524 | #else /* USE_PIPES */ |
525 | /* We are the parent. Close the child sides of the socket pairs. */ | |
526 | close(inout[0]); | |
527 | close(err[0]); | |
528 | ||
529 | /* | |
530 | * Enter the interactive session. Note: server_loop must be able to | |
531 | * handle the case that fdin and fdout are the same. | |
532 | */ | |
e78a59f5 | 533 | if (compat20) { |
e5d7a405 | 534 | session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]); |
e78a59f5 | 535 | } else { |
536 | server_loop(pid, inout[1], inout[1], err[1]); | |
537 | /* server_loop has closed inout[1] and err[1]. */ | |
538 | } | |
7368a6c8 | 539 | #endif /* USE_PIPES */ |
540 | } | |
541 | ||
542 | /* | |
543 | * This is called to fork and execute a command when we have a tty. This | |
544 | * will call do_child from the child, and server_loop from the parent after | |
545 | * setting up file descriptors, controlling tty, updating wtmp, utmp, | |
546 | * lastlog, and other such operations. | |
547 | */ | |
6ae2364d | 548 | void |
65068d16 | 549 | do_exec_pty(Session *s, const char *command) |
7368a6c8 | 550 | { |
7368a6c8 | 551 | int fdout, ptyfd, ttyfd, ptymaster; |
7368a6c8 | 552 | pid_t pid; |
7368a6c8 | 553 | |
554 | if (s == NULL) | |
555 | fatal("do_exec_pty: no session"); | |
556 | ptyfd = s->ptyfd; | |
557 | ttyfd = s->ttyfd; | |
558 | ||
b19d61d7 | 559 | #if defined(USE_PAM) |
bb5639fe | 560 | do_pam_session(s->pw->pw_name, s->tty); |
9afbfcfa | 561 | do_pam_setcred(1); |
27cf96de | 562 | #endif |
266140a8 | 563 | |
7368a6c8 | 564 | /* Fork the child. */ |
565 | if ((pid = fork()) == 0) { | |
57156994 | 566 | |
c345cf9d | 567 | /* Child. Reinitialize the log because the pid has changed. */ |
7368a6c8 | 568 | log_init(__progname, options.log_level, options.log_facility, log_stderr); |
7368a6c8 | 569 | /* Close the master side of the pseudo tty. */ |
570 | close(ptyfd); | |
571 | ||
572 | /* Make the pseudo tty our controlling tty. */ | |
573 | pty_make_controlling_tty(&ttyfd, s->tty); | |
574 | ||
05fd093c | 575 | /* Redirect stdin/stdout/stderr from the pseudo tty. */ |
576 | if (dup2(ttyfd, 0) < 0) | |
577 | error("dup2 stdin: %s", strerror(errno)); | |
578 | if (dup2(ttyfd, 1) < 0) | |
579 | error("dup2 stdout: %s", strerror(errno)); | |
580 | if (dup2(ttyfd, 2) < 0) | |
581 | error("dup2 stderr: %s", strerror(errno)); | |
7368a6c8 | 582 | |
583 | /* Close the extra descriptor for the pseudo tty. */ | |
584 | close(ttyfd); | |
585 | ||
c345cf9d | 586 | /* record login, etc. similar to login(1) */ |
c96a4aaf | 587 | #ifndef HAVE_OSF_SIA |
a22aff1f | 588 | if (!(options.use_login && command == NULL)) |
589 | do_login(s, command); | |
7e2d5fa4 | 590 | # ifdef LOGIN_NEEDS_UTMPX |
591 | else | |
592 | do_pre_login(s); | |
593 | # endif | |
c96a4aaf | 594 | #endif |
7368a6c8 | 595 | |
7368a6c8 | 596 | /* Do common processing for the child, such as execing the command. */ |
56b3e9ce | 597 | do_child(s, command); |
7368a6c8 | 598 | /* NOTREACHED */ |
599 | } | |
3c62e7eb | 600 | #ifdef HAVE_CYGWIN |
601 | if (is_winnt) | |
602 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
603 | #endif | |
7368a6c8 | 604 | if (pid < 0) |
605 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
606 | s->pid = pid; | |
607 | ||
608 | /* Parent. Close the slave side of the pseudo tty. */ | |
609 | close(ttyfd); | |
610 | ||
611 | /* | |
612 | * Create another descriptor of the pty master side for use as the | |
613 | * standard input. We could use the original descriptor, but this | |
614 | * simplifies code in server_loop. The descriptor is bidirectional. | |
615 | */ | |
616 | fdout = dup(ptyfd); | |
617 | if (fdout < 0) | |
618 | packet_disconnect("dup #1 failed: %.100s", strerror(errno)); | |
619 | ||
620 | /* we keep a reference to the pty master */ | |
621 | ptymaster = dup(ptyfd); | |
622 | if (ptymaster < 0) | |
623 | packet_disconnect("dup #2 failed: %.100s", strerror(errno)); | |
624 | s->ptymaster = ptymaster; | |
625 | ||
626 | /* Enter interactive session. */ | |
b5c334cc | 627 | packet_set_interactive(1); |
e78a59f5 | 628 | if (compat20) { |
629 | session_set_fds(s, ptyfd, fdout, -1); | |
630 | } else { | |
631 | server_loop(pid, ptyfd, fdout, -1); | |
632 | /* server_loop _has_ closed ptyfd and fdout. */ | |
e78a59f5 | 633 | } |
7368a6c8 | 634 | } |
635 | ||
7e2d5fa4 | 636 | #ifdef LOGIN_NEEDS_UTMPX |
0e0144b7 | 637 | static void |
7e2d5fa4 | 638 | do_pre_login(Session *s) |
639 | { | |
640 | socklen_t fromlen; | |
641 | struct sockaddr_storage from; | |
642 | pid_t pid = getpid(); | |
643 | ||
644 | /* | |
645 | * Get IP address of client. If the connection is not a socket, let | |
646 | * the address be 0.0.0.0. | |
647 | */ | |
648 | memset(&from, 0, sizeof(from)); | |
649 | if (packet_connection_is_on_socket()) { | |
650 | fromlen = sizeof(from); | |
651 | if (getpeername(packet_get_connection_in(), | |
652 | (struct sockaddr *) & from, &fromlen) < 0) { | |
653 | debug("getpeername: %.100s", strerror(errno)); | |
654 | fatal_cleanup(); | |
655 | } | |
656 | } | |
657 | ||
658 | record_utmp_only(pid, s->tty, s->pw->pw_name, | |
659 | get_remote_name_or_ip(utmp_len, options.reverse_mapping_check), | |
660 | (struct sockaddr *)&from); | |
661 | } | |
662 | #endif | |
663 | ||
dac6753b | 664 | /* |
665 | * This is called to fork and execute a command. If another command is | |
666 | * to be forced, execute that instead. | |
667 | */ | |
668 | void | |
669 | do_exec(Session *s, const char *command) | |
670 | { | |
671 | if (forced_command) { | |
672 | original_command = command; | |
673 | command = forced_command; | |
dac6753b | 674 | debug("Forced command '%.900s'", command); |
675 | } | |
676 | ||
677 | if (s->ttyfd != -1) | |
678 | do_exec_pty(s, command); | |
679 | else | |
680 | do_exec_no_pty(s, command); | |
681 | ||
c95add71 | 682 | original_command = NULL; |
dac6753b | 683 | } |
684 | ||
c345cf9d | 685 | /* administrative, login(1)-like work */ |
686 | void | |
a22aff1f | 687 | do_login(Session *s, const char *command) |
c345cf9d | 688 | { |
c345cf9d | 689 | char *time_string; |
b5e300c2 | 690 | char hostname[MAXHOSTNAMELEN]; |
c345cf9d | 691 | socklen_t fromlen; |
692 | struct sockaddr_storage from; | |
c345cf9d | 693 | time_t last_login_time; |
694 | struct passwd * pw = s->pw; | |
695 | pid_t pid = getpid(); | |
696 | ||
697 | /* | |
698 | * Get IP address of client. If the connection is not a socket, let | |
699 | * the address be 0.0.0.0. | |
700 | */ | |
701 | memset(&from, 0, sizeof(from)); | |
702 | if (packet_connection_is_on_socket()) { | |
703 | fromlen = sizeof(from); | |
704 | if (getpeername(packet_get_connection_in(), | |
705 | (struct sockaddr *) & from, &fromlen) < 0) { | |
706 | debug("getpeername: %.100s", strerror(errno)); | |
707 | fatal_cleanup(); | |
708 | } | |
709 | } | |
710 | ||
bcbf86ec | 711 | /* Get the time and hostname when the user last logged in. */ |
4f4648f9 | 712 | if (options.print_lastlog) { |
713 | hostname[0] = '\0'; | |
714 | last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name, | |
715 | hostname, sizeof(hostname)); | |
716 | } | |
bcbf86ec | 717 | |
c345cf9d | 718 | /* Record that there was a login on that tty from the remote host. */ |
719 | record_login(pid, s->tty, pw->pw_name, pw->pw_uid, | |
46e3af7f | 720 | get_remote_name_or_ip(utmp_len, options.reverse_mapping_check), |
721 | (struct sockaddr *)&from); | |
c345cf9d | 722 | |
2919e060 | 723 | #ifdef USE_PAM |
724 | /* | |
725 | * If password change is needed, do it now. | |
726 | * This needs to occur before the ~/.hushlogin check. | |
727 | */ | |
e11aab29 | 728 | if (is_pam_password_change_required()) { |
2919e060 | 729 | print_pam_messages(); |
730 | do_pam_chauthtok(); | |
731 | } | |
732 | #endif | |
733 | ||
f2c2fd71 | 734 | if (check_quietlogin(s, command)) |
c345cf9d | 735 | return; |
736 | ||
737 | #ifdef USE_PAM | |
e11aab29 | 738 | if (!is_pam_password_change_required()) |
2919e060 | 739 | print_pam_messages(); |
c345cf9d | 740 | #endif /* USE_PAM */ |
741 | #ifdef WITH_AIXAUTHENTICATE | |
742 | if (aixloginmsg && *aixloginmsg) | |
743 | printf("%s\n", aixloginmsg); | |
744 | #endif /* WITH_AIXAUTHENTICATE */ | |
745 | ||
4f4648f9 | 746 | if (options.print_lastlog && last_login_time != 0) { |
c345cf9d | 747 | time_string = ctime(&last_login_time); |
748 | if (strchr(time_string, '\n')) | |
749 | *strchr(time_string, '\n') = 0; | |
f478712e | 750 | if (strcmp(hostname, "") == 0) |
c345cf9d | 751 | printf("Last login: %s\r\n", time_string); |
752 | else | |
bcbf86ec | 753 | printf("Last login: %s from %s\r\n", time_string, hostname); |
c345cf9d | 754 | } |
f2c2fd71 | 755 | |
756 | do_motd(); | |
757 | } | |
758 | ||
759 | /* | |
760 | * Display the message of the day. | |
761 | */ | |
762 | void | |
763 | do_motd(void) | |
764 | { | |
765 | FILE *f; | |
766 | char buf[256]; | |
767 | ||
c345cf9d | 768 | if (options.print_motd) { |
2e73a022 | 769 | #ifdef HAVE_LOGIN_CAP |
770 | f = fopen(login_getcapstr(lc, "welcome", "/etc/motd", | |
771 | "/etc/motd"), "r"); | |
772 | #else | |
c345cf9d | 773 | f = fopen("/etc/motd", "r"); |
2e73a022 | 774 | #endif |
c345cf9d | 775 | if (f) { |
776 | while (fgets(buf, sizeof(buf), f)) | |
777 | fputs(buf, stdout); | |
778 | fclose(f); | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
9c328529 | 783 | |
784 | /* | |
785 | * Check for quiet login, either .hushlogin or command given. | |
786 | */ | |
787 | int | |
788 | check_quietlogin(Session *s, const char *command) | |
789 | { | |
790 | char buf[256]; | |
791 | struct passwd *pw = s->pw; | |
792 | struct stat st; | |
793 | ||
794 | /* Return 1 if .hushlogin exists or a command given. */ | |
795 | if (command != NULL) | |
796 | return 1; | |
797 | snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir); | |
798 | #ifdef HAVE_LOGIN_CAP | |
799 | if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0) | |
800 | return 1; | |
801 | #else | |
802 | if (stat(buf, &st) >= 0) | |
803 | return 1; | |
804 | #endif | |
805 | return 0; | |
806 | } | |
807 | ||
7368a6c8 | 808 | /* |
809 | * Sets the value of the given variable in the environment. If the variable | |
810 | * already exists, its value is overriden. | |
811 | */ | |
396c147e | 812 | static void |
1e3b8b07 | 813 | child_set_env(char ***envp, u_int *envsizep, const char *name, |
7368a6c8 | 814 | const char *value) |
815 | { | |
1e3b8b07 | 816 | u_int i, namelen; |
7368a6c8 | 817 | char **env; |
818 | ||
819 | /* | |
820 | * Find the slot where the value should be stored. If the variable | |
821 | * already exists, we reuse the slot; otherwise we append a new slot | |
822 | * at the end of the array, expanding if necessary. | |
823 | */ | |
824 | env = *envp; | |
825 | namelen = strlen(name); | |
826 | for (i = 0; env[i]; i++) | |
827 | if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=') | |
828 | break; | |
829 | if (env[i]) { | |
830 | /* Reuse the slot. */ | |
831 | xfree(env[i]); | |
832 | } else { | |
833 | /* New variable. Expand if necessary. */ | |
834 | if (i >= (*envsizep) - 1) { | |
835 | (*envsizep) += 50; | |
836 | env = (*envp) = xrealloc(env, (*envsizep) * sizeof(char *)); | |
837 | } | |
838 | /* Need to set the NULL pointer at end of array beyond the new slot. */ | |
839 | env[i + 1] = NULL; | |
840 | } | |
841 | ||
842 | /* Allocate space and format the variable in the appropriate slot. */ | |
843 | env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1); | |
844 | snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value); | |
845 | } | |
846 | ||
847 | /* | |
848 | * Reads environment variables from the given file and adds/overrides them | |
849 | * into the environment. If the file does not exist, this does nothing. | |
850 | * Otherwise, it must consist of empty lines, comments (line starts with '#') | |
851 | * and assignments of the form name=value. No other forms are allowed. | |
852 | */ | |
396c147e | 853 | static void |
1e3b8b07 | 854 | read_environment_file(char ***env, u_int *envsize, |
7368a6c8 | 855 | const char *filename) |
856 | { | |
857 | FILE *f; | |
858 | char buf[4096]; | |
859 | char *cp, *value; | |
860 | ||
861 | f = fopen(filename, "r"); | |
862 | if (!f) | |
863 | return; | |
864 | ||
865 | while (fgets(buf, sizeof(buf), f)) { | |
866 | for (cp = buf; *cp == ' ' || *cp == '\t'; cp++) | |
867 | ; | |
868 | if (!*cp || *cp == '#' || *cp == '\n') | |
869 | continue; | |
870 | if (strchr(cp, '\n')) | |
871 | *strchr(cp, '\n') = '\0'; | |
872 | value = strchr(cp, '='); | |
873 | if (value == NULL) { | |
874 | fprintf(stderr, "Bad line in %.100s: %.200s\n", filename, buf); | |
875 | continue; | |
876 | } | |
71276795 | 877 | /* |
878 | * Replace the equals sign by nul, and advance value to | |
879 | * the value string. | |
880 | */ | |
7368a6c8 | 881 | *value = '\0'; |
882 | value++; | |
883 | child_set_env(env, envsize, cp, value); | |
884 | } | |
885 | fclose(f); | |
886 | } | |
887 | ||
888 | #ifdef USE_PAM | |
889 | /* | |
890 | * Sets any environment variables which have been specified by PAM | |
891 | */ | |
16995a2c | 892 | void do_pam_environment(char ***env, u_int *envsize) |
7368a6c8 | 893 | { |
894 | char *equals, var_name[512], var_val[512]; | |
895 | char **pam_env; | |
896 | int i; | |
897 | ||
898 | if ((pam_env = fetch_pam_environment()) == NULL) | |
899 | return; | |
2b87da3b | 900 | |
7368a6c8 | 901 | for(i = 0; pam_env[i] != NULL; i++) { |
902 | if ((equals = strstr(pam_env[i], "=")) == NULL) | |
903 | continue; | |
2b87da3b | 904 | |
7368a6c8 | 905 | if (strlen(pam_env[i]) < (sizeof(var_name) - 1)) { |
906 | memset(var_name, '\0', sizeof(var_name)); | |
907 | memset(var_val, '\0', sizeof(var_val)); | |
908 | ||
909 | strncpy(var_name, pam_env[i], equals - pam_env[i]); | |
910 | strcpy(var_val, equals + 1); | |
911 | ||
22d89d24 | 912 | debug3("PAM environment: %s=%s", var_name, var_val); |
7368a6c8 | 913 | |
914 | child_set_env(env, envsize, var_name, var_val); | |
915 | } | |
916 | } | |
917 | } | |
918 | #endif /* USE_PAM */ | |
919 | ||
22d89d24 | 920 | #ifdef HAVE_CYGWIN |
16995a2c | 921 | void copy_environment(char ***env, u_int *envsize) |
22d89d24 | 922 | { |
923 | char *equals, var_name[512], var_val[512]; | |
924 | int i; | |
925 | ||
926 | for(i = 0; environ[i] != NULL; i++) { | |
927 | if ((equals = strstr(environ[i], "=")) == NULL) | |
928 | continue; | |
2b87da3b | 929 | |
22d89d24 | 930 | if (strlen(environ[i]) < (sizeof(var_name) - 1)) { |
931 | memset(var_name, '\0', sizeof(var_name)); | |
932 | memset(var_val, '\0', sizeof(var_val)); | |
933 | ||
934 | strncpy(var_name, environ[i], equals - environ[i]); | |
935 | strcpy(var_val, equals + 1); | |
936 | ||
937 | debug3("Copy environment: %s=%s", var_name, var_val); | |
938 | ||
939 | child_set_env(env, envsize, var_name, var_val); | |
940 | } | |
941 | } | |
942 | } | |
943 | #endif | |
944 | ||
5fa45897 | 945 | #if defined(HAVE_GETUSERATTR) |
946 | /* | |
947 | * AIX-specific login initialisation | |
948 | */ | |
949 | void set_limit(char *user, char *soft, char *hard, int resource, int mult) | |
950 | { | |
951 | struct rlimit rlim; | |
56118702 | 952 | int slim, hlim; |
5fa45897 | 953 | |
954 | getrlimit(resource, &rlim); | |
955 | ||
56118702 | 956 | slim = 0; |
957 | if (getuserattr(user, soft, &slim, SEC_INT) != -1) { | |
958 | if (slim < 0) { | |
959 | rlim.rlim_cur = RLIM_INFINITY; | |
960 | } else if (slim != 0) { | |
961 | /* See the wackiness below */ | |
962 | if (rlim.rlim_cur == slim * mult) | |
963 | slim = 0; | |
964 | else | |
965 | rlim.rlim_cur = slim * mult; | |
966 | } | |
967 | } | |
5fa45897 | 968 | |
56118702 | 969 | hlim = 0; |
970 | if (getuserattr(user, hard, &hlim, SEC_INT) != -1) { | |
971 | if (hlim < 0) { | |
972 | rlim.rlim_max = RLIM_INFINITY; | |
973 | } else if (hlim != 0) { | |
974 | rlim.rlim_max = hlim * mult; | |
975 | } | |
976 | } | |
5fa45897 | 977 | |
56118702 | 978 | /* |
979 | * XXX For cpu and fsize the soft limit is set to the hard limit | |
980 | * if the hard limit is left at its default value and the soft limit | |
981 | * is changed from its default value, either by requesting it | |
982 | * (slim == 0) or by setting it to the current default. At least | |
983 | * that's how rlogind does it. If you're confused you're not alone. | |
984 | * Bug or feature? AIX 4.3.1.2 | |
985 | */ | |
986 | if ((!strcmp(soft, "fsize") || !strcmp(soft, "cpu")) | |
987 | && hlim == 0 && slim != 0) | |
988 | rlim.rlim_max = rlim.rlim_cur; | |
989 | /* A specified hard limit limits the soft limit */ | |
990 | else if (hlim > 0 && rlim.rlim_cur > rlim.rlim_max) | |
991 | rlim.rlim_cur = rlim.rlim_max; | |
992 | /* A soft limit can increase a hard limit */ | |
993 | else if (rlim.rlim_cur > rlim.rlim_max) | |
5fa45897 | 994 | rlim.rlim_max = rlim.rlim_cur; |
995 | ||
996 | if (setrlimit(resource, &rlim) != 0) | |
56118702 | 997 | error("setrlimit(%.10s) failed: %.100s", soft, strerror(errno)); |
5fa45897 | 998 | } |
999 | ||
1000 | void set_limits_from_userattr(char *user) | |
1001 | { | |
1002 | int mask; | |
1003 | char buf[16]; | |
1004 | ||
1005 | set_limit(user, S_UFSIZE, S_UFSIZE_HARD, RLIMIT_FSIZE, 512); | |
1006 | set_limit(user, S_UCPU, S_UCPU_HARD, RLIMIT_CPU, 1); | |
1007 | set_limit(user, S_UDATA, S_UDATA_HARD, RLIMIT_DATA, 512); | |
1008 | set_limit(user, S_USTACK, S_USTACK_HARD, RLIMIT_STACK, 512); | |
1009 | set_limit(user, S_URSS, S_URSS_HARD, RLIMIT_RSS, 512); | |
1010 | set_limit(user, S_UCORE, S_UCORE_HARD, RLIMIT_CORE, 512); | |
1011 | #if defined(S_UNOFILE) | |
1012 | set_limit(user, S_UNOFILE, S_UNOFILE_HARD, RLIMIT_NOFILE, 1); | |
1013 | #endif | |
1014 | ||
1015 | if (getuserattr(user, S_UMASK, &mask, SEC_INT) != -1) { | |
1016 | /* Convert decimal to octal */ | |
1017 | (void) snprintf(buf, sizeof(buf), "%d", mask); | |
1018 | if (sscanf(buf, "%o", &mask) == 1) | |
1019 | umask(mask); | |
1020 | } | |
1021 | } | |
1022 | #endif /* defined(HAVE_GETUSERATTR) */ | |
1023 | ||
7368a6c8 | 1024 | /* |
1025 | * Performs common processing for the child, such as setting up the | |
1026 | * environment, closing extra file descriptors, setting the user and group | |
1027 | * ids, and executing the command or shell. | |
1028 | */ | |
6ae2364d | 1029 | void |
56b3e9ce | 1030 | do_child(Session *s, const char *command) |
7368a6c8 | 1031 | { |
b5e300c2 | 1032 | const char *shell, *hostname = NULL, *cp = NULL; |
ced49be2 | 1033 | struct passwd *pw = s->pw; |
7368a6c8 | 1034 | char buf[256]; |
6fc1e9f3 | 1035 | char cmd[1024]; |
2e73a022 | 1036 | FILE *f = NULL; |
1e3b8b07 | 1037 | u_int envsize, i; |
7368a6c8 | 1038 | char **env; |
1039 | extern char **environ; | |
1040 | struct stat st; | |
1041 | char *argv[10]; | |
1500bcdd | 1042 | int do_xauth; |
3206bb3b | 1043 | #ifdef WITH_IRIX_PROJECT |
1044 | prid_t projid; | |
1045 | #endif /* WITH_IRIX_PROJECT */ | |
d287c664 | 1046 | #ifdef WITH_IRIX_JOBS |
1047 | jid_t jid = 0; | |
1048 | #else | |
1049 | #ifdef WITH_IRIX_ARRAY | |
1050 | int jid = 0; | |
1051 | #endif /* WITH_IRIX_ARRAY */ | |
1052 | #endif /* WITH_IRIX_JOBS */ | |
1053 | ||
1500bcdd | 1054 | do_xauth = |
1055 | s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL; | |
1056 | ||
e78e738a | 1057 | /* remove hostkey from the child's memory */ |
1058 | destroy_sensitive_data(); | |
1059 | ||
fa649821 | 1060 | /* login(1) is only called if we execute the login shell */ |
1061 | if (options.use_login && command != NULL) | |
1062 | options.use_login = 0; | |
1063 | ||
453b4bd0 | 1064 | #if !defined(HAVE_OSF_SIA) |
2e73a022 | 1065 | if (!options.use_login) { |
1066 | # ifdef HAVE_LOGIN_CAP | |
1067 | if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid) | |
1068 | f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN, | |
1069 | _PATH_NOLOGIN), "r"); | |
1070 | # else /* HAVE_LOGIN_CAP */ | |
1071 | if (pw->pw_uid) | |
1072 | f = fopen(_PATH_NOLOGIN, "r"); | |
1073 | # endif /* HAVE_LOGIN_CAP */ | |
1074 | if (f) { | |
1075 | /* /etc/nologin exists. Print its contents and exit. */ | |
1076 | while (fgets(buf, sizeof(buf), f)) | |
1077 | fputs(buf, stderr); | |
1078 | fclose(f); | |
7368a6c8 | 1079 | exit(254); |
2e73a022 | 1080 | } |
7368a6c8 | 1081 | } |
453b4bd0 | 1082 | #endif /* HAVE_OSF_SIA */ |
7368a6c8 | 1083 | |
2e73a022 | 1084 | /* Set login name, uid, gid, and groups. */ |
7368a6c8 | 1085 | /* Login(1) does this as well, and it needs uid 0 for the "-h" |
1086 | switch, so we let login(1) to this for us. */ | |
1087 | if (!options.use_login) { | |
4d33e531 | 1088 | #ifdef HAVE_OSF_SIA |
7a7101ec | 1089 | session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty); |
c96a4aaf | 1090 | if (!check_quietlogin(s, command)) |
1091 | do_motd(); | |
815800e1 | 1092 | #else /* HAVE_OSF_SIA */ |
3c62e7eb | 1093 | #ifdef HAVE_CYGWIN |
1094 | if (is_winnt) { | |
1095 | #else | |
7368a6c8 | 1096 | if (getuid() == 0 || geteuid() == 0) { |
3c62e7eb | 1097 | #endif |
2e73a022 | 1098 | # ifdef HAVE_GETUSERATTR |
5fa45897 | 1099 | set_limits_from_userattr(pw->pw_name); |
2e73a022 | 1100 | # endif /* HAVE_GETUSERATTR */ |
1101 | # ifdef HAVE_LOGIN_CAP | |
1102 | if (setusercontext(lc, pw, pw->pw_uid, | |
1103 | (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) { | |
1104 | perror("unable to set user context"); | |
1105 | exit(1); | |
1106 | } | |
1107 | # else /* HAVE_LOGIN_CAP */ | |
73d6d7fa | 1108 | #if defined(HAVE_GETLUID) && defined(HAVE_SETLUID) |
1109 | /* Sets login uid for accounting */ | |
1110 | if (getluid() == -1 && setluid(pw->pw_uid) == -1) | |
1111 | error("setluid: %s", strerror(errno)); | |
1112 | #endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */ | |
1113 | ||
2e73a022 | 1114 | if (setlogin(pw->pw_name) < 0) |
1115 | error("setlogin failed: %s", strerror(errno)); | |
7368a6c8 | 1116 | if (setgid(pw->pw_gid) < 0) { |
1117 | perror("setgid"); | |
1118 | exit(1); | |
1119 | } | |
1120 | /* Initialize the group list. */ | |
1121 | if (initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
1122 | perror("initgroups"); | |
1123 | exit(1); | |
1124 | } | |
1125 | endgrent(); | |
9afbfcfa | 1126 | # ifdef USE_PAM |
1127 | /* | |
1128 | * PAM credentials may take the form of | |
1129 | * supplementary groups. These will have been | |
1130 | * wiped by the above initgroups() call. | |
1131 | * Reestablish them here. | |
1132 | */ | |
1133 | do_pam_setcred(0); | |
1134 | # endif /* USE_PAM */ | |
d287c664 | 1135 | # ifdef WITH_IRIX_JOBS |
1136 | jid = jlimit_startjob(pw->pw_name, pw->pw_uid, "interactive"); | |
1137 | if (jid == -1) { | |
1138 | fatal("Failed to create job container: %.100s", | |
1139 | strerror(errno)); | |
2b87da3b | 1140 | } |
d287c664 | 1141 | # endif /* WITH_IRIX_JOBS */ |
2e73a022 | 1142 | # ifdef WITH_IRIX_ARRAY |
3206bb3b | 1143 | /* initialize array session */ |
d287c664 | 1144 | if (jid == 0) { |
1145 | if (newarraysess() != 0) | |
1146 | fatal("Failed to set up new array session: %.100s", | |
1147 | strerror(errno)); | |
1148 | } | |
2e73a022 | 1149 | # endif /* WITH_IRIX_ARRAY */ |
1150 | # ifdef WITH_IRIX_PROJECT | |
3206bb3b | 1151 | /* initialize irix project info */ |
1152 | if ((projid = getdfltprojuser(pw->pw_name)) == -1) { | |
1153 | debug("Failed to get project id, using projid 0"); | |
1154 | projid = 0; | |
1155 | } | |
3206bb3b | 1156 | if (setprid(projid)) |
1157 | fatal("Failed to initialize project %d for %s: %.100s", | |
1158 | (int)projid, pw->pw_name, strerror(errno)); | |
2e73a022 | 1159 | # endif /* WITH_IRIX_PROJECT */ |
260d427b | 1160 | #ifdef WITH_IRIX_AUDIT |
1161 | if (sysconf(_SC_AUDIT)) { | |
1162 | debug("Setting sat id to %d", (int) pw->pw_uid); | |
1163 | if (satsetid(pw->pw_uid)) | |
1164 | debug("error setting satid: %.100s", strerror(errno)); | |
1165 | } | |
1166 | #endif /* WITH_IRIX_AUDIT */ | |
1167 | ||
8a968c25 | 1168 | #ifdef _AIX |
1169 | /* | |
1170 | * AIX has a "usrinfo" area where logname and | |
1171 | * other stuff is stored - a few applications | |
1172 | * actually use this and die if it's not set | |
1173 | */ | |
ee110bfb | 1174 | if (s->ttyfd == -1) |
1175 | s->tty[0] = '\0'; | |
f5f6020e | 1176 | cp = xmalloc(22 + strlen(s->tty) + |
8a968c25 | 1177 | 2 * strlen(pw->pw_name)); |
1178 | i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c", | |
ee110bfb | 1179 | pw->pw_name, 0, pw->pw_name, 0, s->tty, 0, 0); |
8a968c25 | 1180 | if (usrinfo(SETUINFO, cp, i) == -1) |
1181 | fatal("Couldn't set usrinfo: %s", | |
1182 | strerror(errno)); | |
1183 | debug3("AIX/UsrInfo: set len %d", i); | |
1184 | xfree(cp); | |
1185 | #endif | |
1186 | ||
7368a6c8 | 1187 | /* Permanently switch to the desired uid. */ |
63bd8c36 | 1188 | permanently_set_uid(pw); |
2e73a022 | 1189 | # endif /* HAVE_LOGIN_CAP */ |
7368a6c8 | 1190 | } |
2e73a022 | 1191 | #endif /* HAVE_OSF_SIA */ |
1192 | ||
3c62e7eb | 1193 | #ifdef HAVE_CYGWIN |
1194 | if (is_winnt) | |
1195 | #endif | |
7368a6c8 | 1196 | if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) |
14a9a859 | 1197 | fatal("Failed to set uids to %u.", (u_int) pw->pw_uid); |
7368a6c8 | 1198 | } |
1199 | /* | |
1200 | * Get the shell from the password data. An empty shell field is | |
1201 | * legal, and means /bin/sh. | |
1202 | */ | |
1203 | shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell; | |
2e73a022 | 1204 | #ifdef HAVE_LOGIN_CAP |
1205 | shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell); | |
1206 | #endif | |
7368a6c8 | 1207 | |
7368a6c8 | 1208 | /* Initialize the environment. */ |
1209 | envsize = 100; | |
1210 | env = xmalloc(envsize * sizeof(char *)); | |
1211 | env[0] = NULL; | |
1212 | ||
3c62e7eb | 1213 | #ifdef HAVE_CYGWIN |
1214 | /* | |
1215 | * The Windows environment contains some setting which are | |
1216 | * important for a running system. They must not be dropped. | |
1217 | */ | |
22d89d24 | 1218 | copy_environment(&env, &envsize); |
3c62e7eb | 1219 | #endif |
1220 | ||
7368a6c8 | 1221 | if (!options.use_login) { |
1222 | /* Set basic environment. */ | |
1223 | child_set_env(&env, &envsize, "USER", pw->pw_name); | |
1224 | child_set_env(&env, &envsize, "LOGNAME", pw->pw_name); | |
1225 | child_set_env(&env, &envsize, "HOME", pw->pw_dir); | |
2e73a022 | 1226 | #ifdef HAVE_LOGIN_CAP |
1227 | (void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH); | |
1228 | child_set_env(&env, &envsize, "PATH", getenv("PATH")); | |
22d89d24 | 1229 | #else /* HAVE_LOGIN_CAP */ |
1230 | # ifndef HAVE_CYGWIN | |
3c62e7eb | 1231 | /* |
1232 | * There's no standard path on Windows. The path contains | |
1233 | * important components pointing to the system directories, | |
1234 | * needed for loading shared libraries. So the path better | |
1235 | * remains intact here. | |
1236 | */ | |
7368a6c8 | 1237 | child_set_env(&env, &envsize, "PATH", _PATH_STDPATH); |
22d89d24 | 1238 | # endif /* HAVE_CYGWIN */ |
1239 | #endif /* HAVE_LOGIN_CAP */ | |
7368a6c8 | 1240 | |
1241 | snprintf(buf, sizeof buf, "%.200s/%.50s", | |
1242 | _PATH_MAILDIR, pw->pw_name); | |
1243 | child_set_env(&env, &envsize, "MAIL", buf); | |
1244 | ||
1245 | /* Normal systems set SHELL by default. */ | |
1246 | child_set_env(&env, &envsize, "SHELL", shell); | |
1247 | } | |
1248 | if (getenv("TZ")) | |
1249 | child_set_env(&env, &envsize, "TZ", getenv("TZ")); | |
1250 | ||
1251 | /* Set custom environment options from RSA authentication. */ | |
2548961d | 1252 | if (!options.use_login) { |
1253 | while (custom_environment) { | |
1254 | struct envstring *ce = custom_environment; | |
1255 | char *s = ce->s; | |
1256 | int i; | |
1257 | for (i = 0; s[i] != '=' && s[i]; i++) | |
1258 | ; | |
1259 | if (s[i] == '=') { | |
1260 | s[i] = 0; | |
1261 | child_set_env(&env, &envsize, s, s + i + 1); | |
1262 | } | |
1263 | custom_environment = ce->next; | |
1264 | xfree(ce->s); | |
1265 | xfree(ce); | |
7368a6c8 | 1266 | } |
7368a6c8 | 1267 | } |
1268 | ||
1269 | snprintf(buf, sizeof buf, "%.50s %d %d", | |
1270 | get_remote_ipaddr(), get_remote_port(), get_local_port()); | |
1271 | child_set_env(&env, &envsize, "SSH_CLIENT", buf); | |
1272 | ||
56b3e9ce | 1273 | if (s->ttyfd != -1) |
1274 | child_set_env(&env, &envsize, "SSH_TTY", s->tty); | |
1275 | if (s->term) | |
1276 | child_set_env(&env, &envsize, "TERM", s->term); | |
1277 | if (s->display) | |
1278 | child_set_env(&env, &envsize, "DISPLAY", s->display); | |
b5e300c2 | 1279 | if (original_command) |
1280 | child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND", | |
1281 | original_command); | |
7368a6c8 | 1282 | |
1283 | #ifdef _AIX | |
22d89d24 | 1284 | if ((cp = getenv("AUTHSTATE")) != NULL) |
1285 | child_set_env(&env, &envsize, "AUTHSTATE", cp); | |
1286 | if ((cp = getenv("KRB5CCNAME")) != NULL) | |
1287 | child_set_env(&env, &envsize, "KRB5CCNAME", cp); | |
1288 | read_environment_file(&env, &envsize, "/etc/environment"); | |
7368a6c8 | 1289 | #endif |
7368a6c8 | 1290 | #ifdef KRB4 |
ced49be2 | 1291 | if (s->authctxt->krb4_ticket_file) |
1292 | child_set_env(&env, &envsize, "KRBTKFILE", | |
1293 | s->authctxt->krb4_ticket_file); | |
1294 | #endif | |
1295 | #ifdef KRB5 | |
1296 | if (s->authctxt->krb5_ticket_file) | |
1297 | child_set_env(&env, &envsize, "KRB5CCNAME", | |
1298 | s->authctxt->krb5_ticket_file); | |
1299 | #endif | |
7368a6c8 | 1300 | #ifdef USE_PAM |
1301 | /* Pull in any environment variables that may have been set by PAM. */ | |
1302 | do_pam_environment(&env, &envsize); | |
1303 | #endif /* USE_PAM */ | |
1304 | ||
7368a6c8 | 1305 | if (auth_get_socket_name() != NULL) |
1306 | child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME, | |
1307 | auth_get_socket_name()); | |
1308 | ||
1309 | /* read $HOME/.ssh/environment. */ | |
1310 | if (!options.use_login) { | |
71276795 | 1311 | snprintf(buf, sizeof buf, "%.200s/.ssh/environment", |
1312 | pw->pw_dir); | |
7368a6c8 | 1313 | read_environment_file(&env, &envsize, buf); |
1314 | } | |
1315 | if (debug_flag) { | |
1316 | /* dump the environment */ | |
1317 | fprintf(stderr, "Environment:\n"); | |
1318 | for (i = 0; env[i]; i++) | |
1319 | fprintf(stderr, " %.200s\n", env[i]); | |
1320 | } | |
2e73a022 | 1321 | /* we have to stash the hostname before we close our socket. */ |
1322 | if (options.use_login) | |
46e3af7f | 1323 | hostname = get_remote_name_or_ip(utmp_len, |
1324 | options.reverse_mapping_check); | |
7368a6c8 | 1325 | /* |
1326 | * Close the connection descriptors; note that this is the child, and | |
1327 | * the server will still have the socket open, and it is important | |
1328 | * that we do not shutdown it. Note that the descriptors cannot be | |
1329 | * closed before building the environment, as we call | |
1330 | * get_remote_ipaddr there. | |
1331 | */ | |
1332 | if (packet_get_connection_in() == packet_get_connection_out()) | |
1333 | close(packet_get_connection_in()); | |
1334 | else { | |
1335 | close(packet_get_connection_in()); | |
1336 | close(packet_get_connection_out()); | |
1337 | } | |
1338 | /* | |
1339 | * Close all descriptors related to channels. They will still remain | |
1340 | * open in the parent. | |
1341 | */ | |
1342 | /* XXX better use close-on-exec? -markus */ | |
1343 | channel_close_all(); | |
1344 | ||
1345 | /* | |
1346 | * Close any extra file descriptors. Note that there may still be | |
1347 | * descriptors left by system functions. They will be closed later. | |
1348 | */ | |
1349 | endpwent(); | |
1350 | ||
1351 | /* | |
1352 | * Close any extra open file descriptors so that we don\'t have them | |
1353 | * hanging around in clients. Note that we want to do this after | |
1354 | * initgroups, because at least on Solaris 2.3 it leaves file | |
1355 | * descriptors open. | |
1356 | */ | |
1357 | for (i = 3; i < 64; i++) | |
1358 | close(i); | |
1359 | ||
7368a6c8 | 1360 | /* |
1361 | * Must take new environment into use so that .ssh/rc, /etc/sshrc and | |
1362 | * xauth are run in the proper environment. | |
1363 | */ | |
1364 | environ = env; | |
1365 | ||
6fcf67f7 | 1366 | #ifdef AFS |
1367 | /* Try to get AFS tokens for the local cell. */ | |
1368 | if (k_hasafs()) { | |
1369 | char cell[64]; | |
1370 | ||
1371 | if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0) | |
1372 | krb_afslog(cell, 0); | |
1373 | ||
1374 | krb_afslog(0, 0); | |
1375 | } | |
1376 | #endif /* AFS */ | |
1377 | ||
dab89049 | 1378 | /* Change current directory to the user\'s home directory. */ |
1379 | if (chdir(pw->pw_dir) < 0) { | |
1380 | fprintf(stderr, "Could not chdir to home directory %s: %s\n", | |
1381 | pw->pw_dir, strerror(errno)); | |
1382 | #ifdef HAVE_LOGIN_CAP | |
1383 | if (login_getcapbool(lc, "requirehome", 0)) | |
1384 | exit(1); | |
1385 | #endif | |
1386 | } | |
1387 | ||
7368a6c8 | 1388 | /* |
1389 | * Run $HOME/.ssh/rc, /etc/sshrc, or xauth (whichever is found first | |
1390 | * in this order). | |
1391 | */ | |
1392 | if (!options.use_login) { | |
e78e738a | 1393 | /* ignore _PATH_SSH_USER_RC for subsystems */ |
1394 | if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) { | |
503e7e5b | 1395 | snprintf(cmd, sizeof cmd, "%s -c '%s %s'", |
1396 | shell, _PATH_BSHELL, _PATH_SSH_USER_RC); | |
7368a6c8 | 1397 | if (debug_flag) |
503e7e5b | 1398 | fprintf(stderr, "Running %s\n", cmd); |
1399 | f = popen(cmd, "w"); | |
7368a6c8 | 1400 | if (f) { |
56b3e9ce | 1401 | if (do_xauth) |
1402 | fprintf(f, "%s %s\n", s->auth_proto, | |
1403 | s->auth_data); | |
7368a6c8 | 1404 | pclose(f); |
1405 | } else | |
96c63318 | 1406 | fprintf(stderr, "Could not run %s\n", |
56b3e9ce | 1407 | _PATH_SSH_USER_RC); |
42f11eb2 | 1408 | } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) { |
7368a6c8 | 1409 | if (debug_flag) |
56b3e9ce | 1410 | fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, |
1411 | _PATH_SSH_SYSTEM_RC); | |
42f11eb2 | 1412 | f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w"); |
7368a6c8 | 1413 | if (f) { |
56b3e9ce | 1414 | if (do_xauth) |
1415 | fprintf(f, "%s %s\n", s->auth_proto, | |
1416 | s->auth_data); | |
7368a6c8 | 1417 | pclose(f); |
1418 | } else | |
56b3e9ce | 1419 | fprintf(stderr, "Could not run %s\n", |
1420 | _PATH_SSH_SYSTEM_RC); | |
1421 | } else if (do_xauth && options.xauth_location != NULL) { | |
7368a6c8 | 1422 | /* Add authority data to .Xauthority if appropriate. */ |
56b3e9ce | 1423 | if (debug_flag) { |
1424 | fprintf(stderr, | |
1425 | "Running %.100s add " | |
1426 | "%.100s %.100s %.100s\n", | |
c9d0ad9b | 1427 | options.xauth_location, s->auth_display[0], |
56b3e9ce | 1428 | s->auth_proto, s->auth_data); |
c9d0ad9b | 1429 | if (s->auth_display[1]) |
71276795 | 1430 | fprintf(stderr, |
c9d0ad9b | 1431 | "add %.100s %.100s %.100s\n", |
1432 | s->auth_display[1], | |
56b3e9ce | 1433 | s->auth_proto, s->auth_data); |
1434 | } | |
1435 | snprintf(cmd, sizeof cmd, "%s -q -", | |
1436 | options.xauth_location); | |
1437 | f = popen(cmd, "w"); | |
1438 | if (f) { | |
c9d0ad9b | 1439 | fprintf(f, "add %s %s %s\n", |
1440 | s->auth_display[0], s->auth_proto, | |
1441 | s->auth_data); | |
1442 | if (s->auth_display[1]) | |
1443 | fprintf(f, "add %s %s %s\n", | |
1444 | s->auth_display[1], s->auth_proto, | |
56b3e9ce | 1445 | s->auth_data); |
1446 | pclose(f); | |
1447 | } else { | |
1448 | fprintf(stderr, "Could not run %s\n", | |
1449 | cmd); | |
7368a6c8 | 1450 | } |
1451 | } | |
7368a6c8 | 1452 | /* Get the last component of the shell name. */ |
1453 | cp = strrchr(shell, '/'); | |
1454 | if (cp) | |
1455 | cp++; | |
1456 | else | |
1457 | cp = shell; | |
1458 | } | |
1d3c30db | 1459 | |
1460 | /* restore SIGPIPE for child */ | |
1461 | signal(SIGPIPE, SIG_DFL); | |
1462 | ||
7368a6c8 | 1463 | /* |
1464 | * If we have no command, execute the shell. In this case, the shell | |
1465 | * name to be passed in argv[0] is preceded by '-' to indicate that | |
1466 | * this is a login shell. | |
1467 | */ | |
1468 | if (!command) { | |
1469 | if (!options.use_login) { | |
1470 | char buf[256]; | |
1471 | ||
7368a6c8 | 1472 | /* Start the shell. Set initial character to '-'. */ |
1473 | buf[0] = '-'; | |
74860245 | 1474 | strlcpy(buf + 1, cp, sizeof(buf) - 1); |
7368a6c8 | 1475 | |
1476 | /* Execute the shell. */ | |
1477 | argv[0] = buf; | |
1478 | argv[1] = NULL; | |
1479 | execve(shell, argv, env); | |
1480 | ||
1481 | /* Executing the shell failed. */ | |
1482 | perror(shell); | |
1483 | exit(1); | |
1484 | ||
1485 | } else { | |
1486 | /* Launch login(1). */ | |
1487 | ||
2e73a022 | 1488 | execl(LOGIN_PROGRAM, "login", "-h", hostname, |
7e2d5fa4 | 1489 | #ifdef LOGIN_NEEDS_TERM |
1490 | s->term? s->term : "unknown", | |
1491 | #endif | |
ed916b28 | 1492 | "-p", "-f", "--", pw->pw_name, (char *)NULL); |
7368a6c8 | 1493 | |
1494 | /* Login couldn't be executed, die. */ | |
1495 | ||
1496 | perror("login"); | |
1497 | exit(1); | |
1498 | } | |
1499 | } | |
1500 | /* | |
1501 | * Execute the command using the user's shell. This uses the -c | |
1502 | * option to execute the command. | |
1503 | */ | |
1504 | argv[0] = (char *) cp; | |
1505 | argv[1] = "-c"; | |
1506 | argv[2] = (char *) command; | |
1507 | argv[3] = NULL; | |
1508 | execve(shell, argv, env); | |
1509 | perror(shell); | |
1510 | exit(1); | |
1511 | } | |
1512 | ||
1513 | Session * | |
1514 | session_new(void) | |
1515 | { | |
1516 | int i; | |
1517 | static int did_init = 0; | |
1518 | if (!did_init) { | |
1519 | debug("session_new: init"); | |
1520 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1521 | sessions[i].used = 0; | |
7368a6c8 | 1522 | } |
1523 | did_init = 1; | |
1524 | } | |
1525 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1526 | Session *s = &sessions[i]; | |
1527 | if (! s->used) { | |
690d0d7f | 1528 | memset(s, 0, sizeof(*s)); |
7368a6c8 | 1529 | s->chanid = -1; |
1530 | s->ptyfd = -1; | |
1531 | s->ttyfd = -1; | |
7368a6c8 | 1532 | s->used = 1; |
86066315 | 1533 | s->self = i; |
02323c45 | 1534 | debug("session_new: session %d", i); |
7368a6c8 | 1535 | return s; |
1536 | } | |
1537 | } | |
1538 | return NULL; | |
1539 | } | |
1540 | ||
396c147e | 1541 | static void |
7368a6c8 | 1542 | session_dump(void) |
1543 | { | |
1544 | int i; | |
1545 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1546 | Session *s = &sessions[i]; | |
1547 | debug("dump: used %d session %d %p channel %d pid %d", | |
1548 | s->used, | |
1549 | s->self, | |
1550 | s, | |
1551 | s->chanid, | |
1552 | s->pid); | |
1553 | } | |
1554 | } | |
1555 | ||
e78a59f5 | 1556 | int |
57156994 | 1557 | session_open(Authctxt *authctxt, int chanid) |
e78a59f5 | 1558 | { |
1559 | Session *s = session_new(); | |
1560 | debug("session_open: channel %d", chanid); | |
1561 | if (s == NULL) { | |
1562 | error("no more sessions"); | |
1563 | return 0; | |
1564 | } | |
57156994 | 1565 | s->authctxt = authctxt; |
1566 | s->pw = authctxt->pw; | |
e78a59f5 | 1567 | if (s->pw == NULL) |
0725ea77 | 1568 | fatal("no user for session %d", s->self); |
0b242b12 | 1569 | debug("session_open: session %d: link with channel %d", s->self, chanid); |
1570 | s->chanid = chanid; | |
e78a59f5 | 1571 | return 1; |
1572 | } | |
1573 | ||
396c147e | 1574 | static Session * |
e78a59f5 | 1575 | session_by_channel(int id) |
1576 | { | |
1577 | int i; | |
1578 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1579 | Session *s = &sessions[i]; | |
1580 | if (s->used && s->chanid == id) { | |
1581 | debug("session_by_channel: session %d channel %d", i, id); | |
1582 | return s; | |
1583 | } | |
1584 | } | |
1585 | debug("session_by_channel: unknown channel %d", id); | |
1586 | session_dump(); | |
1587 | return NULL; | |
1588 | } | |
1589 | ||
396c147e | 1590 | static Session * |
e78a59f5 | 1591 | session_by_pid(pid_t pid) |
1592 | { | |
1593 | int i; | |
1594 | debug("session_by_pid: pid %d", pid); | |
1595 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1596 | Session *s = &sessions[i]; | |
1597 | if (s->used && s->pid == pid) | |
1598 | return s; | |
1599 | } | |
1600 | error("session_by_pid: unknown pid %d", pid); | |
1601 | session_dump(); | |
1602 | return NULL; | |
1603 | } | |
1604 | ||
396c147e | 1605 | static int |
e78a59f5 | 1606 | session_window_change_req(Session *s) |
1607 | { | |
1608 | s->col = packet_get_int(); | |
1609 | s->row = packet_get_int(); | |
1610 | s->xpixel = packet_get_int(); | |
1611 | s->ypixel = packet_get_int(); | |
6ae2364d | 1612 | packet_done(); |
e78a59f5 | 1613 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1614 | return 1; | |
1615 | } | |
1616 | ||
396c147e | 1617 | static int |
e78a59f5 | 1618 | session_pty_req(Session *s) |
1619 | { | |
1e3b8b07 | 1620 | u_int len; |
30dcc918 | 1621 | int n_bytes; |
e78a59f5 | 1622 | |
653d5f86 | 1623 | if (no_pty_flag) { |
1624 | debug("Allocating a pty not permitted for this authentication."); | |
38c295d6 | 1625 | return 0; |
653d5f86 | 1626 | } |
1627 | if (s->ttyfd != -1) { | |
1628 | packet_disconnect("Protocol error: you already have a pty."); | |
6ae2364d | 1629 | return 0; |
653d5f86 | 1630 | } |
1631 | ||
e78a59f5 | 1632 | s->term = packet_get_string(&len); |
653d5f86 | 1633 | |
1634 | if (compat20) { | |
1635 | s->col = packet_get_int(); | |
1636 | s->row = packet_get_int(); | |
1637 | } else { | |
1638 | s->row = packet_get_int(); | |
1639 | s->col = packet_get_int(); | |
1640 | } | |
e78a59f5 | 1641 | s->xpixel = packet_get_int(); |
1642 | s->ypixel = packet_get_int(); | |
1643 | ||
1644 | if (strcmp(s->term, "") == 0) { | |
1645 | xfree(s->term); | |
1646 | s->term = NULL; | |
1647 | } | |
653d5f86 | 1648 | |
e78a59f5 | 1649 | /* Allocate a pty and open it. */ |
653d5f86 | 1650 | debug("Allocating pty."); |
e78a59f5 | 1651 | if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty))) { |
653d5f86 | 1652 | if (s->term) |
1653 | xfree(s->term); | |
e78a59f5 | 1654 | s->term = NULL; |
1655 | s->ptyfd = -1; | |
1656 | s->ttyfd = -1; | |
1657 | error("session_pty_req: session %d alloc failed", s->self); | |
6ae2364d | 1658 | return 0; |
e78a59f5 | 1659 | } |
1660 | debug("session_pty_req: session %d alloc %s", s->self, s->tty); | |
653d5f86 | 1661 | |
1662 | /* for SSH1 the tty modes length is not given */ | |
1663 | if (!compat20) | |
1664 | n_bytes = packet_remaining(); | |
1665 | tty_parse_modes(s->ttyfd, &n_bytes); | |
1666 | ||
e78a59f5 | 1667 | /* |
1668 | * Add a cleanup function to clear the utmp entry and record logout | |
1669 | * time in case we call fatal() (e.g., the connection gets closed). | |
1670 | */ | |
86066315 | 1671 | fatal_add_cleanup(session_pty_cleanup, (void *)s); |
e78a59f5 | 1672 | pty_setowner(s->pw, s->tty); |
653d5f86 | 1673 | |
1674 | /* Set window size from the packet. */ | |
e78a59f5 | 1675 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1676 | ||
30dcc918 | 1677 | packet_done(); |
1d1ffb87 | 1678 | session_proctitle(s); |
e78a59f5 | 1679 | return 1; |
1680 | } | |
1681 | ||
396c147e | 1682 | static int |
0b242b12 | 1683 | session_subsystem_req(Session *s) |
1684 | { | |
01855277 | 1685 | struct stat st; |
1e3b8b07 | 1686 | u_int len; |
0b242b12 | 1687 | int success = 0; |
01855277 | 1688 | char *cmd, *subsys = packet_get_string(&len); |
38c295d6 | 1689 | int i; |
0b242b12 | 1690 | |
1691 | packet_done(); | |
1692 | log("subsystem request for %s", subsys); | |
1693 | ||
38c295d6 | 1694 | for (i = 0; i < options.num_subsystems; i++) { |
01855277 | 1695 | if (strcmp(subsys, options.subsystem_name[i]) == 0) { |
1696 | cmd = options.subsystem_command[i]; | |
1697 | if (stat(cmd, &st) < 0) { | |
1698 | error("subsystem: cannot stat %s: %s", cmd, | |
1699 | strerror(errno)); | |
1700 | break; | |
1701 | } | |
1702 | debug("subsystem: exec() %s", cmd); | |
e5d7a405 | 1703 | s->is_subsystem = 1; |
01855277 | 1704 | do_exec(s, cmd); |
38c295d6 | 1705 | success = 1; |
1706 | } | |
1707 | } | |
1708 | ||
1709 | if (!success) | |
01855277 | 1710 | log("subsystem request for %s failed, subsystem not found", |
1711 | subsys); | |
38c295d6 | 1712 | |
0b242b12 | 1713 | xfree(subsys); |
1714 | return success; | |
1715 | } | |
1716 | ||
396c147e | 1717 | static int |
0b242b12 | 1718 | session_x11_req(Session *s) |
1719 | { | |
8dcd9d5c | 1720 | int success; |
0b242b12 | 1721 | |
1722 | s->single_connection = packet_get_char(); | |
1723 | s->auth_proto = packet_get_string(NULL); | |
1724 | s->auth_data = packet_get_string(NULL); | |
1725 | s->screen = packet_get_int(); | |
1726 | packet_done(); | |
1727 | ||
8dcd9d5c | 1728 | success = session_setup_x11fwd(s); |
1729 | if (!success) { | |
0b242b12 | 1730 | xfree(s->auth_proto); |
1731 | xfree(s->auth_data); | |
1500bcdd | 1732 | s->auth_proto = NULL; |
1733 | s->auth_data = NULL; | |
0b242b12 | 1734 | } |
8dcd9d5c | 1735 | return success; |
0b242b12 | 1736 | } |
1737 | ||
396c147e | 1738 | static int |
38c295d6 | 1739 | session_shell_req(Session *s) |
1740 | { | |
38c295d6 | 1741 | packet_done(); |
dac6753b | 1742 | do_exec(s, NULL); |
38c295d6 | 1743 | return 1; |
1744 | } | |
1745 | ||
396c147e | 1746 | static int |
38c295d6 | 1747 | session_exec_req(Session *s) |
1748 | { | |
1e3b8b07 | 1749 | u_int len; |
38c295d6 | 1750 | char *command = packet_get_string(&len); |
1751 | packet_done(); | |
dac6753b | 1752 | do_exec(s, command); |
c95add71 | 1753 | xfree(command); |
38c295d6 | 1754 | return 1; |
1755 | } | |
1756 | ||
396c147e | 1757 | static int |
fa08c86b | 1758 | session_auth_agent_req(Session *s) |
1759 | { | |
1760 | static int called = 0; | |
1761 | packet_done(); | |
d343d900 | 1762 | if (no_agent_forwarding_flag) { |
1763 | debug("session_auth_agent_req: no_agent_forwarding_flag"); | |
1764 | return 0; | |
1765 | } | |
fa08c86b | 1766 | if (called) { |
1767 | return 0; | |
1768 | } else { | |
1769 | called = 1; | |
1770 | return auth_input_request_forwarding(s->pw); | |
1771 | } | |
1772 | } | |
1773 | ||
e78a59f5 | 1774 | void |
1775 | session_input_channel_req(int id, void *arg) | |
1776 | { | |
1e3b8b07 | 1777 | u_int len; |
e78a59f5 | 1778 | int reply; |
1779 | int success = 0; | |
1780 | char *rtype; | |
1781 | Session *s; | |
1782 | Channel *c; | |
1783 | ||
1784 | rtype = packet_get_string(&len); | |
1785 | reply = packet_get_char(); | |
1786 | ||
1787 | s = session_by_channel(id); | |
1788 | if (s == NULL) | |
1789 | fatal("session_input_channel_req: channel %d: no session", id); | |
1790 | c = channel_lookup(id); | |
1791 | if (c == NULL) | |
1792 | fatal("session_input_channel_req: channel %d: bad channel", id); | |
1793 | ||
1794 | debug("session_input_channel_req: session %d channel %d request %s reply %d", | |
1795 | s->self, id, rtype, reply); | |
1796 | ||
1797 | /* | |
e5d7a405 | 1798 | * a session is in LARVAL state until a shell, a command |
1799 | * or a subsystem is executed | |
e78a59f5 | 1800 | */ |
1801 | if (c->type == SSH_CHANNEL_LARVAL) { | |
1802 | if (strcmp(rtype, "shell") == 0) { | |
38c295d6 | 1803 | success = session_shell_req(s); |
e78a59f5 | 1804 | } else if (strcmp(rtype, "exec") == 0) { |
38c295d6 | 1805 | success = session_exec_req(s); |
e78a59f5 | 1806 | } else if (strcmp(rtype, "pty-req") == 0) { |
35484284 | 1807 | success = session_pty_req(s); |
0b242b12 | 1808 | } else if (strcmp(rtype, "x11-req") == 0) { |
1809 | success = session_x11_req(s); | |
fa08c86b | 1810 | } else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) { |
1811 | success = session_auth_agent_req(s); | |
0b242b12 | 1812 | } else if (strcmp(rtype, "subsystem") == 0) { |
1813 | success = session_subsystem_req(s); | |
e78a59f5 | 1814 | } |
1815 | } | |
1816 | if (strcmp(rtype, "window-change") == 0) { | |
1817 | success = session_window_change_req(s); | |
1818 | } | |
1819 | ||
1820 | if (reply) { | |
1821 | packet_start(success ? | |
1822 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
1823 | packet_put_int(c->remote_id); | |
1824 | packet_send(); | |
1825 | } | |
1826 | xfree(rtype); | |
1827 | } | |
1828 | ||
1829 | void | |
1830 | session_set_fds(Session *s, int fdin, int fdout, int fderr) | |
1831 | { | |
1832 | if (!compat20) | |
1833 | fatal("session_set_fds: called for proto != 2.0"); | |
1834 | /* | |
1835 | * now that have a child and a pipe to the child, | |
1836 | * we can activate our channel and register the fd's | |
1837 | */ | |
1838 | if (s->chanid == -1) | |
1839 | fatal("no channel for session %d", s->self); | |
1840 | channel_set_fds(s->chanid, | |
1841 | fdout, fdin, fderr, | |
a22aff1f | 1842 | fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, |
1843 | 1); | |
e78a59f5 | 1844 | } |
1845 | ||
86066315 | 1846 | /* |
1847 | * Function to perform pty cleanup. Also called if we get aborted abnormally | |
1848 | * (e.g., due to a dropped connection). | |
1849 | */ | |
396c147e | 1850 | static void |
86066315 | 1851 | session_pty_cleanup(void *session) |
7368a6c8 | 1852 | { |
86066315 | 1853 | Session *s = session; |
1854 | ||
1855 | if (s == NULL) { | |
1856 | error("session_pty_cleanup: no session"); | |
1857 | return; | |
1858 | } | |
1859 | if (s->ttyfd == -1) | |
7368a6c8 | 1860 | return; |
1861 | ||
0725ea77 | 1862 | debug("session_pty_cleanup: session %d release %s", s->self, s->tty); |
7368a6c8 | 1863 | |
7368a6c8 | 1864 | /* Record that the user has logged out. */ |
86066315 | 1865 | if (s->pid != 0) |
1866 | record_logout(s->pid, s->tty); | |
7368a6c8 | 1867 | |
1868 | /* Release the pseudo-tty. */ | |
1869 | pty_release(s->tty); | |
1870 | ||
1871 | /* | |
1872 | * Close the server side of the socket pairs. We must do this after | |
1873 | * the pty cleanup, so that another process doesn't get this pty | |
1874 | * while we're still cleaning up. | |
1875 | */ | |
1876 | if (close(s->ptymaster) < 0) | |
1877 | error("close(s->ptymaster): %s", strerror(errno)); | |
efcc9957 | 1878 | |
1879 | /* unlink pty from session */ | |
1880 | s->ttyfd = -1; | |
7368a6c8 | 1881 | } |
e78a59f5 | 1882 | |
396c147e | 1883 | static void |
e78a59f5 | 1884 | session_exit_message(Session *s, int status) |
1885 | { | |
1886 | Channel *c; | |
1887 | if (s == NULL) | |
1888 | fatal("session_close: no session"); | |
1889 | c = channel_lookup(s->chanid); | |
1890 | if (c == NULL) | |
86066315 | 1891 | fatal("session_exit_message: session %d: no channel %d", |
e78a59f5 | 1892 | s->self, s->chanid); |
1893 | debug("session_exit_message: session %d channel %d pid %d", | |
1894 | s->self, s->chanid, s->pid); | |
1895 | ||
1896 | if (WIFEXITED(status)) { | |
1897 | channel_request_start(s->chanid, | |
1898 | "exit-status", 0); | |
1899 | packet_put_int(WEXITSTATUS(status)); | |
1900 | packet_send(); | |
1901 | } else if (WIFSIGNALED(status)) { | |
1902 | channel_request_start(s->chanid, | |
1903 | "exit-signal", 0); | |
1904 | packet_put_int(WTERMSIG(status)); | |
a64009ad | 1905 | #ifdef WCOREDUMP |
e78a59f5 | 1906 | packet_put_char(WCOREDUMP(status)); |
a64009ad | 1907 | #else /* WCOREDUMP */ |
1908 | packet_put_char(0); | |
1909 | #endif /* WCOREDUMP */ | |
e78a59f5 | 1910 | packet_put_cstring(""); |
1911 | packet_put_cstring(""); | |
1912 | packet_send(); | |
1913 | } else { | |
1914 | /* Some weird exit cause. Just exit. */ | |
1915 | packet_disconnect("wait returned status %04x.", status); | |
1916 | } | |
1917 | ||
1918 | /* disconnect channel */ | |
1919 | debug("session_exit_message: release channel %d", s->chanid); | |
1920 | channel_cancel_cleanup(s->chanid); | |
9da5c3c9 | 1921 | /* |
1922 | * emulate a write failure with 'chan_write_failed', nobody will be | |
1923 | * interested in data we write. | |
1924 | * Note that we must not call 'chan_read_failed', since there could | |
1925 | * be some more data waiting in the pipe. | |
1926 | */ | |
0b242b12 | 1927 | if (c->ostate != CHAN_OUTPUT_CLOSED) |
1928 | chan_write_failed(c); | |
e78a59f5 | 1929 | s->chanid = -1; |
1930 | } | |
1931 | ||
396c147e | 1932 | static void |
86066315 | 1933 | session_close(Session *s) |
e78a59f5 | 1934 | { |
86066315 | 1935 | debug("session_close: session %d pid %d", s->self, s->pid); |
1936 | if (s->ttyfd != -1) { | |
1937 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1938 | session_pty_cleanup(s); | |
1939 | } | |
e78a59f5 | 1940 | if (s->term) |
1941 | xfree(s->term); | |
1942 | if (s->display) | |
1943 | xfree(s->display); | |
c9d0ad9b | 1944 | if (s->auth_display[0]) |
1945 | xfree(s->auth_display[0]); | |
1946 | if (s->auth_display[1]) | |
1947 | xfree(s->auth_display[1]); | |
e78a59f5 | 1948 | if (s->auth_data) |
1949 | xfree(s->auth_data); | |
1950 | if (s->auth_proto) | |
1951 | xfree(s->auth_proto); | |
1952 | s->used = 0; | |
1d1ffb87 | 1953 | session_proctitle(s); |
e78a59f5 | 1954 | } |
1955 | ||
1956 | void | |
1957 | session_close_by_pid(pid_t pid, int status) | |
1958 | { | |
1959 | Session *s = session_by_pid(pid); | |
1960 | if (s == NULL) { | |
eb26141e | 1961 | debug("session_close_by_pid: no session for pid %d", pid); |
e78a59f5 | 1962 | return; |
1963 | } | |
1964 | if (s->chanid != -1) | |
1965 | session_exit_message(s, status); | |
1966 | session_close(s); | |
1967 | } | |
1968 | ||
1969 | /* | |
1970 | * this is called when a channel dies before | |
1971 | * the session 'child' itself dies | |
1972 | */ | |
1973 | void | |
1974 | session_close_by_channel(int id, void *arg) | |
1975 | { | |
1976 | Session *s = session_by_channel(id); | |
1977 | if (s == NULL) { | |
418e724c | 1978 | debug("session_close_by_channel: no session for id %d", id); |
e78a59f5 | 1979 | return; |
1980 | } | |
418e724c | 1981 | debug("session_close_by_channel: channel %d child %d", id, s->pid); |
d5f24f94 | 1982 | if (s->pid != 0) { |
418e724c | 1983 | debug("session_close_by_channel: channel %d: has child", id); |
efcc9957 | 1984 | /* |
1985 | * delay detach of session, but release pty, since | |
1986 | * the fd's to the child are already closed | |
1987 | */ | |
1988 | if (s->ttyfd != -1) { | |
1989 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1990 | session_pty_cleanup(s); | |
1991 | } | |
418e724c | 1992 | return; |
e78a59f5 | 1993 | } |
418e724c | 1994 | /* detach by removing callback */ |
1995 | channel_cancel_cleanup(s->chanid); | |
1996 | s->chanid = -1; | |
d5f24f94 | 1997 | session_close(s); |
1998 | } | |
1999 | ||
2000 | void | |
418e724c | 2001 | session_destroy_all(void) |
d5f24f94 | 2002 | { |
2003 | int i; | |
2004 | for(i = 0; i < MAX_SESSIONS; i++) { | |
2005 | Session *s = &sessions[i]; | |
418e724c | 2006 | if (s->used) |
d5f24f94 | 2007 | session_close(s); |
d5f24f94 | 2008 | } |
e78a59f5 | 2009 | } |
2010 | ||
396c147e | 2011 | static char * |
1d1ffb87 | 2012 | session_tty_list(void) |
2013 | { | |
2014 | static char buf[1024]; | |
2015 | int i; | |
2016 | buf[0] = '\0'; | |
2017 | for(i = 0; i < MAX_SESSIONS; i++) { | |
2018 | Session *s = &sessions[i]; | |
2019 | if (s->used && s->ttyfd != -1) { | |
2020 | if (buf[0] != '\0') | |
2021 | strlcat(buf, ",", sizeof buf); | |
2022 | strlcat(buf, strrchr(s->tty, '/') + 1, sizeof buf); | |
2023 | } | |
2024 | } | |
2025 | if (buf[0] == '\0') | |
2026 | strlcpy(buf, "notty", sizeof buf); | |
2027 | return buf; | |
2028 | } | |
2029 | ||
2030 | void | |
2031 | session_proctitle(Session *s) | |
2032 | { | |
2033 | if (s->pw == NULL) | |
2034 | error("no user for session %d", s->self); | |
2035 | else | |
2036 | setproctitle("%s@%s", s->pw->pw_name, session_tty_list()); | |
2037 | } | |
2038 | ||
8dcd9d5c | 2039 | int |
2040 | session_setup_x11fwd(Session *s) | |
2041 | { | |
8dcd9d5c | 2042 | struct stat st; |
c9d0ad9b | 2043 | char display[512], auth_display[512]; |
2044 | char hostname[MAXHOSTNAMELEN]; | |
8dcd9d5c | 2045 | |
2046 | if (no_x11_forwarding_flag) { | |
2047 | packet_send_debug("X11 forwarding disabled in user configuration file."); | |
2048 | return 0; | |
2049 | } | |
2050 | if (!options.x11_forwarding) { | |
2051 | debug("X11 forwarding disabled in server configuration file."); | |
2052 | return 0; | |
2053 | } | |
2054 | if (!options.xauth_location || | |
2055 | (stat(options.xauth_location, &st) == -1)) { | |
2056 | packet_send_debug("No xauth program; cannot forward with spoofing."); | |
2057 | return 0; | |
2058 | } | |
ff027d84 | 2059 | if (options.use_login) { |
2060 | packet_send_debug("X11 forwarding disabled; " | |
2061 | "not compatible with UseLogin=yes."); | |
2062 | return 0; | |
2063 | } | |
b44de2b1 | 2064 | if (s->display != NULL) { |
8dcd9d5c | 2065 | debug("X11 display already set."); |
2066 | return 0; | |
2067 | } | |
c9d0ad9b | 2068 | s->display_number = x11_create_display_inet(options.x11_display_offset, |
2069 | options.gateway_ports); | |
2070 | if (s->display_number == -1) { | |
b44de2b1 | 2071 | debug("x11_create_display_inet failed."); |
8dcd9d5c | 2072 | return 0; |
2073 | } | |
c9d0ad9b | 2074 | |
2075 | /* Set up a suitable value for the DISPLAY variable. */ | |
2076 | if (gethostname(hostname, sizeof(hostname)) < 0) | |
2077 | fatal("gethostname: %.100s", strerror(errno)); | |
2078 | /* | |
2079 | * auth_display must be used as the displayname when the | |
2080 | * authorization entry is added with xauth(1). This will be | |
2081 | * different than the DISPLAY string for localhost displays. | |
2082 | */ | |
2083 | s->auth_display[1] = NULL; | |
2084 | if (!options.gateway_ports) { | |
2085 | struct utsname uts; | |
2086 | ||
2087 | snprintf(display, sizeof display, "localhost:%d.%d", | |
2088 | s->display_number, s->screen); | |
2089 | snprintf(auth_display, sizeof auth_display, "%.400s/unix:%d.%d", | |
2090 | hostname, s->display_number, s->screen); | |
2091 | s->display = xstrdup(display); | |
2092 | s->auth_display[0] = xstrdup(auth_display); | |
2093 | /* | |
2094 | * Xlib may use gethostbyname() or uname() hostname to | |
2095 | * look up authorization data for FamilyLocal; see: | |
2096 | * xc/lib/xtrans/Xtrans.c:TRANS(GetHostname) | |
2097 | * We just add authorization entries with both | |
2098 | * hostname and nodename if they are different. | |
2099 | */ | |
2100 | if (uname(&uts) == -1) | |
2101 | fatal("uname: %.100s", strerror(errno)); | |
2102 | if (strcmp(hostname, uts.nodename) != 0) { | |
2103 | snprintf(auth_display, sizeof auth_display, | |
2104 | "%.400s/unix:%d.%d", uts.nodename, | |
2105 | s->display_number, s->screen); | |
2106 | s->auth_display[1] = xstrdup(auth_display); | |
2107 | } | |
2108 | } else { | |
2109 | #ifdef IPADDR_IN_DISPLAY | |
2110 | struct hostent *he; | |
2111 | struct in_addr my_addr; | |
2112 | ||
2113 | he = gethostbyname(hostname); | |
2114 | if (he == NULL) { | |
2115 | error("Can't get IP address for X11 DISPLAY."); | |
2116 | packet_send_debug("Can't get IP address for X11 DISPLAY."); | |
2117 | return 0; | |
2118 | } | |
2119 | memcpy(&my_addr, he->h_addr_list[0], sizeof(struct in_addr)); | |
2120 | snprintf(display, sizeof display, "%.50s:%d.%d", inet_ntoa(my_addr), | |
2121 | s->display_number, s->screen); | |
2122 | #else | |
2123 | snprintf(display, sizeof display, "%.400s:%d.%d", hostname, | |
2124 | s->display_number, s->screen); | |
2125 | #endif | |
2126 | s->display = xstrdup(display); | |
2127 | s->auth_display[0] = xstrdup(display); | |
2128 | } | |
2129 | ||
8dcd9d5c | 2130 | return 1; |
2131 | } | |
2132 | ||
396c147e | 2133 | static void |
59c97189 | 2134 | do_authenticated2(Authctxt *authctxt) |
e78a59f5 | 2135 | { |
57156994 | 2136 | server_loop2(authctxt); |
e78a59f5 | 2137 | } |