2 * Copyright (c) 2002 Networks Associates Technology, Inc.
5 * This software was developed for the FreeBSD Project by ThinkSec AS and
6 * NAI Labs, the Security Research Division of Network Associates, Inc.
7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
8 * DARPA CHATS research program.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 /* Based on $FreeBSD: src/crypto/openssh/auth2-pam-freebsd.c,v 1.11 2003/03/31 13:48:18 des Exp $ */
34 RCSID("$Id: auth-pam.c,v 1.100 2004/04/18 01:00:26 dtucker Exp $");
37 #if defined(HAVE_SECURITY_PAM_APPL_H)
38 #include <security/pam_appl.h>
39 #elif defined (HAVE_PAM_PAM_APPL_H)
40 #include <pam/pam_appl.h>
49 #include "monitor_wrap.h"
56 #include "auth-options.h"
58 extern ServerOptions options
;
59 extern Buffer loginmsg
;
61 extern u_int utmp_len
;
63 #ifdef USE_POSIX_THREADS
66 * Avoid namespace clash when *not* using pthreads for systems *with*
67 * pthreads, which unconditionally define pthread_t via sys/types.h
70 typedef pthread_t sp_pthread_t
;
72 typedef pid_t sp_pthread_t
;
76 sp_pthread_t pam_thread
;
82 static void sshpam_free_ctx(void *);
83 static struct pam_ctxt
*cleanup_ctxt
;
85 #ifndef USE_POSIX_THREADS
87 * Simulate threads with processes.
90 static int sshpam_thread_status
= -1;
91 static mysig_t sshpam_oldsig
;
94 sshpam_sigchld_handler(int sig
)
96 if (cleanup_ctxt
== NULL
)
97 return; /* handler called after PAM cleanup, shouldn't happen */
98 if (waitpid(cleanup_ctxt
->pam_thread
, &sshpam_thread_status
, 0) == -1)
99 return; /* couldn't wait for process */
100 if (WIFSIGNALED(sshpam_thread_status
) &&
101 WTERMSIG(sshpam_thread_status
) == SIGTERM
)
102 return; /* terminated by pthread_cancel */
103 if (!WIFEXITED(sshpam_thread_status
))
104 fatal("PAM: authentication thread exited unexpectedly");
105 if (WEXITSTATUS(sshpam_thread_status
) != 0)
106 fatal("PAM: authentication thread exited uncleanly");
110 pthread_exit(void *value __unused
)
116 pthread_create(sp_pthread_t
*thread
, const void *attr __unused
,
117 void *(*thread_start
)(void *), void *arg
)
121 sshpam_thread_status
= -1;
122 switch ((pid
= fork())) {
124 error("fork(): %s", strerror(errno
));
131 sshpam_oldsig
= signal(SIGCHLD
, sshpam_sigchld_handler
);
137 pthread_cancel(sp_pthread_t thread
)
139 signal(SIGCHLD
, sshpam_oldsig
);
140 return (kill(thread
, SIGTERM
));
144 pthread_join(sp_pthread_t thread
, void **value __unused
)
148 if (sshpam_thread_status
!= -1)
149 return (sshpam_thread_status
);
150 signal(SIGCHLD
, sshpam_oldsig
);
151 waitpid(thread
, &status
, 0);
157 static pam_handle_t
*sshpam_handle
= NULL
;
158 static int sshpam_err
= 0;
159 static int sshpam_authenticated
= 0;
160 static int sshpam_session_open
= 0;
161 static int sshpam_cred_established
= 0;
162 static int sshpam_account_status
= -1;
163 static char **sshpam_env
= NULL
;
164 static Authctxt
*sshpam_authctxt
= NULL
;
166 /* Some PAM implementations don't implement this */
167 #ifndef HAVE_PAM_GETENVLIST
169 pam_getenvlist(pam_handle_t
*pamh
)
172 * XXX - If necessary, we can still support envrionment passing
173 * for platforms without pam_getenvlist by searching for known
174 * env vars (e.g. KRB5CCNAME) from the PAM environment.
181 pam_password_change_required(int reqd
)
183 debug3("%s %d", __func__
, reqd
);
184 if (sshpam_authctxt
== NULL
)
185 fatal("%s: PAM authctxt not initialized", __func__
);
186 sshpam_authctxt
->force_pwchange
= reqd
;
188 no_port_forwarding_flag
|= 2;
189 no_agent_forwarding_flag
|= 2;
190 no_x11_forwarding_flag
|= 2;
192 no_port_forwarding_flag
&= ~2;
193 no_agent_forwarding_flag
&= ~2;
194 no_x11_forwarding_flag
&= ~2;
198 /* Import regular and PAM environment from subprocess */
200 import_environments(Buffer
*b
)
206 debug3("PAM: %s entering", __func__
);
208 #ifndef USE_POSIX_THREADS
209 /* Import variables set by do_pam_account */
210 sshpam_account_status
= buffer_get_int(b
);
211 pam_password_change_required(buffer_get_int(b
));
213 /* Import environment from subprocess */
214 num_env
= buffer_get_int(b
);
215 sshpam_env
= xmalloc((num_env
+ 1) * sizeof(*sshpam_env
));
216 debug3("PAM: num env strings %d", num_env
);
217 for(i
= 0; i
< num_env
; i
++)
218 sshpam_env
[i
] = buffer_get_string(b
, NULL
);
220 sshpam_env
[num_env
] = NULL
;
222 /* Import PAM environment from subprocess */
223 num_env
= buffer_get_int(b
);
224 debug("PAM: num PAM env strings %d", num_env
);
225 for(i
= 0; i
< num_env
; i
++) {
226 env
= buffer_get_string(b
, NULL
);
228 #ifdef HAVE_PAM_PUTENV
229 /* Errors are not fatal here */
230 if ((err
= pam_putenv(sshpam_handle
, env
)) != PAM_SUCCESS
) {
231 error("PAM: pam_putenv: %s",
232 pam_strerror(sshpam_handle
, sshpam_err
));
240 * Conversation function for authentication thread.
243 sshpam_thread_conv(int n
, const struct pam_message
**msg
,
244 struct pam_response
**resp
, void *data
)
247 struct pam_ctxt
*ctxt
;
248 struct pam_response
*reply
;
251 debug3("PAM: %s entering, %d messages", __func__
, n
);
255 if (n
<= 0 || n
> PAM_MAX_NUM_MSG
)
256 return (PAM_CONV_ERR
);
258 if ((reply
= malloc(n
* sizeof(*reply
))) == NULL
)
259 return (PAM_CONV_ERR
);
260 memset(reply
, 0, n
* sizeof(*reply
));
262 buffer_init(&buffer
);
263 for (i
= 0; i
< n
; ++i
) {
264 switch (PAM_MSG_MEMBER(msg
, i
, msg_style
)) {
265 case PAM_PROMPT_ECHO_OFF
:
266 buffer_put_cstring(&buffer
,
267 PAM_MSG_MEMBER(msg
, i
, msg
));
268 if (ssh_msg_send(ctxt
->pam_csock
,
269 PAM_MSG_MEMBER(msg
, i
, msg_style
), &buffer
) == -1)
271 if (ssh_msg_recv(ctxt
->pam_csock
, &buffer
) == -1)
273 if (buffer_get_char(&buffer
) != PAM_AUTHTOK
)
275 reply
[i
].resp
= buffer_get_string(&buffer
, NULL
);
277 case PAM_PROMPT_ECHO_ON
:
278 buffer_put_cstring(&buffer
,
279 PAM_MSG_MEMBER(msg
, i
, msg
));
280 if (ssh_msg_send(ctxt
->pam_csock
,
281 PAM_MSG_MEMBER(msg
, i
, msg_style
), &buffer
) == -1)
283 if (ssh_msg_recv(ctxt
->pam_csock
, &buffer
) == -1)
285 if (buffer_get_char(&buffer
) != PAM_AUTHTOK
)
287 reply
[i
].resp
= buffer_get_string(&buffer
, NULL
);
290 buffer_put_cstring(&buffer
,
291 PAM_MSG_MEMBER(msg
, i
, msg
));
292 if (ssh_msg_send(ctxt
->pam_csock
,
293 PAM_MSG_MEMBER(msg
, i
, msg_style
), &buffer
) == -1)
297 buffer_put_cstring(&buffer
,
298 PAM_MSG_MEMBER(msg
, i
, msg
));
299 if (ssh_msg_send(ctxt
->pam_csock
,
300 PAM_MSG_MEMBER(msg
, i
, msg_style
), &buffer
) == -1)
306 buffer_clear(&buffer
);
308 buffer_free(&buffer
);
310 return (PAM_SUCCESS
);
313 for(i
= 0; i
< n
; i
++) {
314 if (reply
[i
].resp
!= NULL
)
315 xfree(reply
[i
].resp
);
318 buffer_free(&buffer
);
319 return (PAM_CONV_ERR
);
323 * Authentication thread.
326 sshpam_thread(void *ctxtp
)
328 struct pam_ctxt
*ctxt
= ctxtp
;
330 struct pam_conv sshpam_conv
;
331 #ifndef USE_POSIX_THREADS
332 extern char **environ
;
335 const char *pam_user
;
337 pam_get_item(sshpam_handle
, PAM_USER
, (const void **)&pam_user
);
338 setproctitle("%s [pam]", pam_user
);
342 sshpam_conv
.conv
= sshpam_thread_conv
;
343 sshpam_conv
.appdata_ptr
= ctxt
;
345 if (sshpam_authctxt
== NULL
)
346 fatal("%s: PAM authctxt not initialized", __func__
);
348 buffer_init(&buffer
);
349 sshpam_err
= pam_set_item(sshpam_handle
, PAM_CONV
,
350 (const void *)&sshpam_conv
);
351 if (sshpam_err
!= PAM_SUCCESS
)
353 sshpam_err
= pam_authenticate(sshpam_handle
, 0);
354 if (sshpam_err
!= PAM_SUCCESS
)
358 if (!do_pam_account())
360 if (sshpam_authctxt
->force_pwchange
) {
361 sshpam_err
= pam_chauthtok(sshpam_handle
,
362 PAM_CHANGE_EXPIRED_AUTHTOK
);
363 if (sshpam_err
!= PAM_SUCCESS
)
365 pam_password_change_required(0);
369 buffer_put_cstring(&buffer
, "OK");
371 #ifndef USE_POSIX_THREADS
372 /* Export variables set by do_pam_account */
373 buffer_put_int(&buffer
, sshpam_account_status
);
374 buffer_put_int(&buffer
, sshpam_authctxt
->force_pwchange
);
376 /* Export any environment strings set in child */
377 for(i
= 0; environ
[i
] != NULL
; i
++)
379 buffer_put_int(&buffer
, i
);
380 for(i
= 0; environ
[i
] != NULL
; i
++)
381 buffer_put_cstring(&buffer
, environ
[i
]);
383 /* Export any environment strings set by PAM in child */
384 env_from_pam
= pam_getenvlist(sshpam_handle
);
385 for(i
= 0; env_from_pam
!= NULL
&& env_from_pam
[i
] != NULL
; i
++)
387 buffer_put_int(&buffer
, i
);
388 for(i
= 0; env_from_pam
!= NULL
&& env_from_pam
[i
] != NULL
; i
++)
389 buffer_put_cstring(&buffer
, env_from_pam
[i
]);
390 #endif /* USE_POSIX_THREADS */
392 /* XXX - can't do much about an error here */
393 ssh_msg_send(ctxt
->pam_csock
, sshpam_err
, &buffer
);
394 buffer_free(&buffer
);
398 buffer_put_cstring(&buffer
,
399 pam_strerror(sshpam_handle
, sshpam_err
));
400 /* XXX - can't do much about an error here */
401 ssh_msg_send(ctxt
->pam_csock
, PAM_AUTH_ERR
, &buffer
);
402 buffer_free(&buffer
);
405 return (NULL
); /* Avoid warning for non-pthread case */
409 sshpam_thread_cleanup(void)
411 struct pam_ctxt
*ctxt
= cleanup_ctxt
;
413 debug3("PAM: %s entering", __func__
);
414 if (ctxt
!= NULL
&& ctxt
->pam_thread
!= 0) {
415 pthread_cancel(ctxt
->pam_thread
);
416 pthread_join(ctxt
->pam_thread
, NULL
);
417 close(ctxt
->pam_psock
);
418 close(ctxt
->pam_csock
);
419 memset(ctxt
, 0, sizeof(*ctxt
));
425 sshpam_null_conv(int n
, const struct pam_message
**msg
,
426 struct pam_response
**resp
, void *data
)
428 debug3("PAM: %s entering, %d messages", __func__
, n
);
429 return (PAM_CONV_ERR
);
432 static struct pam_conv null_conv
= { sshpam_null_conv
, NULL
};
437 debug("PAM: cleanup");
438 if (sshpam_handle
== NULL
)
440 pam_set_item(sshpam_handle
, PAM_CONV
, (const void *)&null_conv
);
441 if (sshpam_cred_established
) {
442 pam_setcred(sshpam_handle
, PAM_DELETE_CRED
);
443 sshpam_cred_established
= 0;
445 if (sshpam_session_open
) {
446 pam_close_session(sshpam_handle
, PAM_SILENT
);
447 sshpam_session_open
= 0;
449 sshpam_authenticated
= 0;
450 pam_end(sshpam_handle
, sshpam_err
);
451 sshpam_handle
= NULL
;
455 sshpam_init(Authctxt
*authctxt
)
457 extern char *__progname
;
458 const char *pam_rhost
, *pam_user
, *user
= authctxt
->user
;
460 if (sshpam_handle
!= NULL
) {
461 /* We already have a PAM context; check if the user matches */
462 sshpam_err
= pam_get_item(sshpam_handle
,
463 PAM_USER
, (const void **)&pam_user
);
464 if (sshpam_err
== PAM_SUCCESS
&& strcmp(user
, pam_user
) == 0)
466 pam_end(sshpam_handle
, sshpam_err
);
467 sshpam_handle
= NULL
;
469 debug("PAM: initializing for \"%s\"", user
);
471 pam_start(SSHD_PAM_SERVICE
, user
, &null_conv
, &sshpam_handle
);
472 sshpam_authctxt
= authctxt
;
474 if (sshpam_err
!= PAM_SUCCESS
) {
475 pam_end(sshpam_handle
, sshpam_err
);
476 sshpam_handle
= NULL
;
479 pam_rhost
= get_remote_name_or_ip(utmp_len
, options
.use_dns
);
480 debug("PAM: setting PAM_RHOST to \"%s\"", pam_rhost
);
481 sshpam_err
= pam_set_item(sshpam_handle
, PAM_RHOST
, pam_rhost
);
482 if (sshpam_err
!= PAM_SUCCESS
) {
483 pam_end(sshpam_handle
, sshpam_err
);
484 sshpam_handle
= NULL
;
487 #ifdef PAM_TTY_KLUDGE
489 * Some silly PAM modules (e.g. pam_time) require a TTY to operate.
490 * sshd doesn't set the tty until too late in the auth process and
491 * may not even set one (for tty-less connections)
493 debug("PAM: setting PAM_TTY to \"ssh\"");
494 sshpam_err
= pam_set_item(sshpam_handle
, PAM_TTY
, "ssh");
495 if (sshpam_err
!= PAM_SUCCESS
) {
496 pam_end(sshpam_handle
, sshpam_err
);
497 sshpam_handle
= NULL
;
505 sshpam_init_ctx(Authctxt
*authctxt
)
507 struct pam_ctxt
*ctxt
;
510 debug3("PAM: %s entering", __func__
);
511 /* Refuse to start if we don't have PAM enabled */
512 if (!options
.use_pam
)
516 if (sshpam_init(authctxt
) == -1) {
517 error("PAM: initialization failed");
521 ctxt
= xmalloc(sizeof *ctxt
);
522 memset(ctxt
, 0, sizeof(*ctxt
));
524 /* Start the authentication thread */
525 if (socketpair(AF_UNIX
, SOCK_STREAM
, PF_UNSPEC
, socks
) == -1) {
526 error("PAM: failed create sockets: %s", strerror(errno
));
530 ctxt
->pam_psock
= socks
[0];
531 ctxt
->pam_csock
= socks
[1];
532 if (pthread_create(&ctxt
->pam_thread
, NULL
, sshpam_thread
, ctxt
) == -1) {
533 error("PAM: failed to start authentication thread: %s",
545 sshpam_query(void *ctx
, char **name
, char **info
,
546 u_int
*num
, char ***prompts
, u_int
**echo_on
)
549 struct pam_ctxt
*ctxt
= ctx
;
555 debug3("PAM: %s entering", __func__
);
556 buffer_init(&buffer
);
559 *prompts
= xmalloc(sizeof(char *));
562 *echo_on
= xmalloc(sizeof(u_int
));
563 while (ssh_msg_recv(ctxt
->pam_psock
, &buffer
) == 0) {
564 type
= buffer_get_char(&buffer
);
565 msg
= buffer_get_string(&buffer
, NULL
);
567 case PAM_PROMPT_ECHO_ON
:
568 case PAM_PROMPT_ECHO_OFF
:
570 len
= plen
+ strlen(msg
) + 1;
571 **prompts
= xrealloc(**prompts
, len
);
572 plen
+= snprintf(**prompts
+ plen
, len
, "%s", msg
);
573 **echo_on
= (type
== PAM_PROMPT_ECHO_ON
);
578 /* accumulate messages */
579 len
= plen
+ strlen(msg
) + 2;
580 **prompts
= xrealloc(**prompts
, len
);
581 plen
+= snprintf(**prompts
+ plen
, len
, "%s\n", msg
);
586 if (**prompts
!= NULL
) {
587 /* drain any accumulated messages */
588 debug("PAM: %s", **prompts
);
589 buffer_append(&loginmsg
, **prompts
,
594 if (type
== PAM_SUCCESS
) {
595 import_environments(&buffer
);
602 error("PAM: %s for %s%.100s from %.100s", msg
,
603 sshpam_authctxt
->valid
? "" : "illegal user ",
604 sshpam_authctxt
->user
,
605 get_remote_name_or_ip(utmp_len
, options
.use_dns
));
618 /* XXX - see also comment in auth-chall.c:verify_response */
620 sshpam_respond(void *ctx
, u_int num
, char **resp
)
623 struct pam_ctxt
*ctxt
= ctx
;
625 debug2("PAM: %s entering, %d responses", __func__
, num
);
626 switch (ctxt
->pam_done
) {
628 sshpam_authenticated
= 1;
636 error("PAM: expected one response, got %u", num
);
639 buffer_init(&buffer
);
640 buffer_put_cstring(&buffer
, *resp
);
641 if (ssh_msg_send(ctxt
->pam_psock
, PAM_AUTHTOK
, &buffer
) == -1) {
642 buffer_free(&buffer
);
645 buffer_free(&buffer
);
650 sshpam_free_ctx(void *ctxtp
)
652 struct pam_ctxt
*ctxt
= ctxtp
;
654 debug3("PAM: %s entering", __func__
);
655 sshpam_thread_cleanup();
658 * We don't call sshpam_cleanup() here because we may need the PAM
659 * handle at a later stage, e.g. when setting up a session. It's
660 * still on the cleanup list, so pam_end() *will* be called before
661 * the server process terminates.
665 KbdintDevice sshpam_device
= {
673 KbdintDevice mm_sshpam_device
= {
682 * This replaces auth-pam.c
685 start_pam(Authctxt
*authctxt
)
687 if (!options
.use_pam
)
688 fatal("PAM: initialisation requested when UsePAM=no");
690 if (sshpam_init(authctxt
) == -1)
691 fatal("PAM: initialisation failed");
703 if (sshpam_account_status
!= -1)
704 return (sshpam_account_status
);
706 sshpam_err
= pam_acct_mgmt(sshpam_handle
, 0);
707 debug3("PAM: %s pam_acct_mgmt = %d", __func__
, sshpam_err
);
709 if (sshpam_err
!= PAM_SUCCESS
&& sshpam_err
!= PAM_NEW_AUTHTOK_REQD
) {
710 sshpam_account_status
= 0;
711 return (sshpam_account_status
);
714 if (sshpam_err
== PAM_NEW_AUTHTOK_REQD
)
715 pam_password_change_required(1);
717 sshpam_account_status
= 1;
718 return (sshpam_account_status
);
722 do_pam_set_tty(const char *tty
)
725 debug("PAM: setting PAM_TTY to \"%s\"", tty
);
726 sshpam_err
= pam_set_item(sshpam_handle
, PAM_TTY
, tty
);
727 if (sshpam_err
!= PAM_SUCCESS
)
728 fatal("PAM: failed to set PAM_TTY: %s",
729 pam_strerror(sshpam_handle
, sshpam_err
));
734 do_pam_setcred(int init
)
736 sshpam_err
= pam_set_item(sshpam_handle
, PAM_CONV
,
737 (const void *)&null_conv
);
738 if (sshpam_err
!= PAM_SUCCESS
)
739 fatal("PAM: failed to set PAM_CONV: %s",
740 pam_strerror(sshpam_handle
, sshpam_err
));
742 debug("PAM: establishing credentials");
743 sshpam_err
= pam_setcred(sshpam_handle
, PAM_ESTABLISH_CRED
);
745 debug("PAM: reinitializing credentials");
746 sshpam_err
= pam_setcred(sshpam_handle
, PAM_REINITIALIZE_CRED
);
748 if (sshpam_err
== PAM_SUCCESS
) {
749 sshpam_cred_established
= 1;
752 if (sshpam_authenticated
)
753 fatal("PAM: pam_setcred(): %s",
754 pam_strerror(sshpam_handle
, sshpam_err
));
756 debug("PAM: pam_setcred(): %s",
757 pam_strerror(sshpam_handle
, sshpam_err
));
761 pam_tty_conv(int n
, const struct pam_message
**msg
,
762 struct pam_response
**resp
, void *data
)
764 char input
[PAM_MAX_MSG_SIZE
];
765 struct pam_response
*reply
;
768 debug3("PAM: %s called with %d messages", __func__
, n
);
772 if (n
<= 0 || n
> PAM_MAX_NUM_MSG
|| !isatty(STDIN_FILENO
))
773 return (PAM_CONV_ERR
);
775 if ((reply
= malloc(n
* sizeof(*reply
))) == NULL
)
776 return (PAM_CONV_ERR
);
777 memset(reply
, 0, n
* sizeof(*reply
));
779 for (i
= 0; i
< n
; ++i
) {
780 switch (PAM_MSG_MEMBER(msg
, i
, msg_style
)) {
781 case PAM_PROMPT_ECHO_OFF
:
783 read_passphrase(PAM_MSG_MEMBER(msg
, i
, msg
),
785 reply
[i
].resp_retcode
= PAM_SUCCESS
;
787 case PAM_PROMPT_ECHO_ON
:
788 fprintf(stderr
, "%s\n", PAM_MSG_MEMBER(msg
, i
, msg
));
789 fgets(input
, sizeof input
, stdin
);
790 reply
[i
].resp
= xstrdup(input
);
791 reply
[i
].resp_retcode
= PAM_SUCCESS
;
795 fprintf(stderr
, "%s\n", PAM_MSG_MEMBER(msg
, i
, msg
));
796 reply
[i
].resp_retcode
= PAM_SUCCESS
;
803 return (PAM_SUCCESS
);
806 for(i
= 0; i
< n
; i
++) {
807 if (reply
[i
].resp
!= NULL
)
808 xfree(reply
[i
].resp
);
811 return (PAM_CONV_ERR
);
814 static struct pam_conv tty_conv
= { pam_tty_conv
, NULL
};
817 * XXX this should be done in the authentication phase, but ssh1 doesn't
821 do_pam_chauthtok(void)
824 fatal("Password expired (unable to change with privsep)");
825 sshpam_err
= pam_set_item(sshpam_handle
, PAM_CONV
,
826 (const void *)&tty_conv
);
827 if (sshpam_err
!= PAM_SUCCESS
)
828 fatal("PAM: failed to set PAM_CONV: %s",
829 pam_strerror(sshpam_handle
, sshpam_err
));
830 debug("PAM: changing password");
831 sshpam_err
= pam_chauthtok(sshpam_handle
, PAM_CHANGE_EXPIRED_AUTHTOK
);
832 if (sshpam_err
!= PAM_SUCCESS
)
833 fatal("PAM: pam_chauthtok(): %s",
834 pam_strerror(sshpam_handle
, sshpam_err
));
838 pam_store_conv(int n
, const struct pam_message
**msg
,
839 struct pam_response
**resp
, void *data
)
841 struct pam_response
*reply
;
845 debug3("PAM: %s called with %d messages", __func__
, n
);
848 if (n
<= 0 || n
> PAM_MAX_NUM_MSG
)
849 return (PAM_CONV_ERR
);
851 if ((reply
= malloc(n
* sizeof(*reply
))) == NULL
)
852 return (PAM_CONV_ERR
);
853 memset(reply
, 0, n
* sizeof(*reply
));
855 for (i
= 0; i
< n
; ++i
) {
856 switch (PAM_MSG_MEMBER(msg
, i
, msg_style
)) {
859 len
= strlen(PAM_MSG_MEMBER(msg
, i
, msg
));
860 buffer_append(&loginmsg
, PAM_MSG_MEMBER(msg
, i
, msg
), len
);
861 buffer_append(&loginmsg
, "\n", 1 );
862 reply
[i
].resp_retcode
= PAM_SUCCESS
;
869 return (PAM_SUCCESS
);
872 for(i
= 0; i
< n
; i
++) {
873 if (reply
[i
].resp
!= NULL
)
874 xfree(reply
[i
].resp
);
877 return (PAM_CONV_ERR
);
880 static struct pam_conv store_conv
= { pam_store_conv
, NULL
};
885 debug3("PAM: opening session");
886 sshpam_err
= pam_set_item(sshpam_handle
, PAM_CONV
,
887 (const void *)&store_conv
);
888 if (sshpam_err
!= PAM_SUCCESS
)
889 fatal("PAM: failed to set PAM_CONV: %s",
890 pam_strerror(sshpam_handle
, sshpam_err
));
891 sshpam_err
= pam_open_session(sshpam_handle
, 0);
892 if (sshpam_err
!= PAM_SUCCESS
)
893 fatal("PAM: pam_open_session(): %s",
894 pam_strerror(sshpam_handle
, sshpam_err
));
895 sshpam_session_open
= 1;
899 * Set a PAM environment string. We need to do this so that the session
900 * modules can handle things like Kerberos/GSI credentials that appear
901 * during the ssh authentication process.
904 do_pam_putenv(char *name
, char *value
)
907 #ifdef HAVE_PAM_PUTENV
911 len
= strlen(name
) + strlen(value
) + 2;
912 compound
= xmalloc(len
);
914 snprintf(compound
, len
, "%s=%s", name
, value
);
915 ret
= pam_putenv(sshpam_handle
, compound
);
923 fetch_pam_child_environment(void)
929 fetch_pam_environment(void)
931 return (pam_getenvlist(sshpam_handle
));
935 free_pam_environment(char **env
)
942 for (envp
= env
; *envp
; envp
++)