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 $ */
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;
62 #ifdef USE_POSIX_THREADS
65 * Avoid namespace clash when *not* using pthreads for systems *with*
66 * pthreads, which unconditionally define pthread_t via sys/types.h
69 typedef pthread_t sp_pthread_t;
71 typedef pid_t sp_pthread_t;
75 sp_pthread_t pam_thread;
81 static void sshpam_free_ctx(void *);
82 static struct pam_ctxt *cleanup_ctxt;
84 #ifndef USE_POSIX_THREADS
86 * Simulate threads with processes.
89 static int sshpam_thread_status = -1;
90 static mysig_t sshpam_oldsig;
93 sshpam_sigchld_handler(int sig)
95 if (cleanup_ctxt == NULL)
96 return; /* handler called after PAM cleanup, shouldn't happen */
97 if (waitpid(cleanup_ctxt->pam_thread, &sshpam_thread_status, 0) == -1)
98 return; /* couldn't wait for process */
99 if (WIFSIGNALED(sshpam_thread_status) &&
100 WTERMSIG(sshpam_thread_status) == SIGTERM)
101 return; /* terminated by pthread_cancel */
102 if (!WIFEXITED(sshpam_thread_status))
103 fatal("PAM: authentication thread exited unexpectedly");
104 if (WEXITSTATUS(sshpam_thread_status) != 0)
105 fatal("PAM: authentication thread exited uncleanly");
109 pthread_exit(void *value __unused)
115 pthread_create(sp_pthread_t *thread, const void *attr __unused,
116 void *(*thread_start)(void *), void *arg)
120 switch ((pid = fork())) {
122 error("fork(): %s", strerror(errno));
129 sshpam_oldsig = signal(SIGCHLD, sshpam_sigchld_handler);
135 pthread_cancel(sp_pthread_t thread)
137 signal(SIGCHLD, sshpam_oldsig);
138 return (kill(thread, SIGTERM));
142 pthread_join(sp_pthread_t thread, void **value __unused)
146 if (sshpam_thread_status != -1)
147 return (sshpam_thread_status);
148 signal(SIGCHLD, sshpam_oldsig);
149 waitpid(thread, &status, 0);
155 static pam_handle_t *sshpam_handle = NULL;
156 static int sshpam_err = 0;
157 static int sshpam_authenticated = 0;
158 static int sshpam_session_open = 0;
159 static int sshpam_cred_established = 0;
160 static int sshpam_account_status = -1;
161 static char **sshpam_env = NULL;
162 static int *force_pwchange;
164 /* Some PAM implementations don't implement this */
165 #ifndef HAVE_PAM_GETENVLIST
167 pam_getenvlist(pam_handle_t *pamh)
170 * XXX - If necessary, we can still support envrionment passing
171 * for platforms without pam_getenvlist by searching for known
172 * env vars (e.g. KRB5CCNAME) from the PAM environment.
179 pam_password_change_required(int reqd)
181 debug3("%s %d", __func__, reqd);
182 *force_pwchange = reqd;
184 no_port_forwarding_flag |= 2;
185 no_agent_forwarding_flag |= 2;
186 no_x11_forwarding_flag |= 2;
188 no_port_forwarding_flag &= ~2;
189 no_agent_forwarding_flag &= ~2;
190 no_x11_forwarding_flag &= ~2;
194 /* Import regular and PAM environment from subprocess */
196 import_environments(Buffer *b)
202 debug3("PAM: %s entering", __func__);
204 /* Import variables set by do_pam_account */
205 sshpam_account_status = buffer_get_int(b);
206 pam_password_change_required(buffer_get_int(b));
208 /* Import environment from subprocess */
209 num_env = buffer_get_int(b);
210 sshpam_env = xmalloc((num_env + 1) * sizeof(*sshpam_env));
211 debug3("PAM: num env strings %d", num_env);
212 for(i = 0; i < num_env; i++)
213 sshpam_env[i] = buffer_get_string(b, NULL);
215 sshpam_env[num_env] = NULL;
217 /* Import PAM environment from subprocess */
218 num_env = buffer_get_int(b);
219 debug("PAM: num PAM env strings %d", num_env);
220 for(i = 0; i < num_env; i++) {
221 env = buffer_get_string(b, NULL);
223 #ifdef HAVE_PAM_PUTENV
224 /* Errors are not fatal here */
225 if ((err = pam_putenv(sshpam_handle, env)) != PAM_SUCCESS) {
226 error("PAM: pam_putenv: %s",
227 pam_strerror(sshpam_handle, sshpam_err));
234 * Conversation function for authentication thread.
237 sshpam_thread_conv(int n, const struct pam_message **msg,
238 struct pam_response **resp, void *data)
241 struct pam_ctxt *ctxt;
242 struct pam_response *reply;
245 debug3("PAM: %s entering, %d messages", __func__, n);
249 if (n <= 0 || n > PAM_MAX_NUM_MSG)
250 return (PAM_CONV_ERR);
252 if ((reply = malloc(n * sizeof(*reply))) == NULL)
253 return (PAM_CONV_ERR);
254 memset(reply, 0, n * sizeof(*reply));
256 buffer_init(&buffer);
257 for (i = 0; i < n; ++i) {
258 switch (PAM_MSG_MEMBER(msg, i, msg_style)) {
259 case PAM_PROMPT_ECHO_OFF:
260 buffer_put_cstring(&buffer,
261 PAM_MSG_MEMBER(msg, i, msg));
262 if (ssh_msg_send(ctxt->pam_csock,
263 PAM_MSG_MEMBER(msg, i, msg_style), &buffer) == -1)
265 if (ssh_msg_recv(ctxt->pam_csock, &buffer) == -1)
267 if (buffer_get_char(&buffer) != PAM_AUTHTOK)
269 reply[i].resp = buffer_get_string(&buffer, NULL);
271 case PAM_PROMPT_ECHO_ON:
272 buffer_put_cstring(&buffer,
273 PAM_MSG_MEMBER(msg, i, msg));
274 if (ssh_msg_send(ctxt->pam_csock,
275 PAM_MSG_MEMBER(msg, i, msg_style), &buffer) == -1)
277 if (ssh_msg_recv(ctxt->pam_csock, &buffer) == -1)
279 if (buffer_get_char(&buffer) != PAM_AUTHTOK)
281 reply[i].resp = buffer_get_string(&buffer, NULL);
284 buffer_put_cstring(&buffer,
285 PAM_MSG_MEMBER(msg, i, msg));
286 if (ssh_msg_send(ctxt->pam_csock,
287 PAM_MSG_MEMBER(msg, i, msg_style), &buffer) == -1)
291 buffer_put_cstring(&buffer,
292 PAM_MSG_MEMBER(msg, i, msg));
293 if (ssh_msg_send(ctxt->pam_csock,
294 PAM_MSG_MEMBER(msg, i, msg_style), &buffer) == -1)
300 buffer_clear(&buffer);
302 buffer_free(&buffer);
304 return (PAM_SUCCESS);
307 for(i = 0; i < n; i++) {
308 if (reply[i].resp != NULL)
309 xfree(reply[i].resp);
312 buffer_free(&buffer);
313 return (PAM_CONV_ERR);
317 * Authentication thread.
320 sshpam_thread(void *ctxtp)
322 struct pam_ctxt *ctxt = ctxtp;
324 struct pam_conv sshpam_conv;
325 #ifndef USE_POSIX_THREADS
326 extern char **environ;
329 const char *pam_user;
331 pam_get_item(sshpam_handle, PAM_USER, (const void **)&pam_user);
332 setproctitle("%s [pam]", pam_user);
336 sshpam_conv.conv = sshpam_thread_conv;
337 sshpam_conv.appdata_ptr = ctxt;
339 buffer_init(&buffer);
340 sshpam_err = pam_set_item(sshpam_handle, PAM_CONV,
341 (const void *)&sshpam_conv);
342 if (sshpam_err != PAM_SUCCESS)
344 sshpam_err = pam_authenticate(sshpam_handle, 0);
345 if (sshpam_err != PAM_SUCCESS)
349 if (!do_pam_account())
351 if (*force_pwchange) {
352 sshpam_err = pam_chauthtok(sshpam_handle,
353 PAM_CHANGE_EXPIRED_AUTHTOK);
354 if (sshpam_err != PAM_SUCCESS)
356 pam_password_change_required(0);
360 buffer_put_cstring(&buffer, "OK");
362 #ifndef USE_POSIX_THREADS
363 /* Export variables set by do_pam_account */
364 buffer_put_int(&buffer, sshpam_account_status);
365 buffer_put_int(&buffer, *force_pwchange);
367 /* Export any environment strings set in child */
368 for(i = 0; environ[i] != NULL; i++)
370 buffer_put_int(&buffer, i);
371 for(i = 0; environ[i] != NULL; i++)
372 buffer_put_cstring(&buffer, environ[i]);
374 /* Export any environment strings set by PAM in child */
375 env_from_pam = pam_getenvlist(sshpam_handle);
376 for(i = 0; env_from_pam != NULL && env_from_pam[i] != NULL; i++)
378 buffer_put_int(&buffer, i);
379 for(i = 0; env_from_pam != NULL && env_from_pam[i] != NULL; i++)
380 buffer_put_cstring(&buffer, env_from_pam[i]);
381 #endif /* USE_POSIX_THREADS */
383 /* XXX - can't do much about an error here */
384 ssh_msg_send(ctxt->pam_csock, sshpam_err, &buffer);
385 buffer_free(&buffer);
389 buffer_put_cstring(&buffer,
390 pam_strerror(sshpam_handle, sshpam_err));
391 /* XXX - can't do much about an error here */
392 ssh_msg_send(ctxt->pam_csock, PAM_AUTH_ERR, &buffer);
393 buffer_free(&buffer);
396 return (NULL); /* Avoid warning for non-pthread case */
400 sshpam_thread_cleanup(void)
402 struct pam_ctxt *ctxt = cleanup_ctxt;
404 debug3("PAM: %s entering", __func__);
405 if (ctxt != NULL && ctxt->pam_thread != 0) {
406 pthread_cancel(ctxt->pam_thread);
407 pthread_join(ctxt->pam_thread, NULL);
408 close(ctxt->pam_psock);
409 close(ctxt->pam_csock);
410 memset(ctxt, 0, sizeof(*ctxt));
416 sshpam_null_conv(int n, const struct pam_message **msg,
417 struct pam_response **resp, void *data)
419 debug3("PAM: %s entering, %d messages", __func__, n);
420 return (PAM_CONV_ERR);
423 static struct pam_conv null_conv = { sshpam_null_conv, NULL };
428 debug("PAM: cleanup");
429 if (sshpam_handle == NULL)
431 pam_set_item(sshpam_handle, PAM_CONV, (const void *)&null_conv);
432 if (sshpam_cred_established) {
433 pam_setcred(sshpam_handle, PAM_DELETE_CRED);
434 sshpam_cred_established = 0;
436 if (sshpam_session_open) {
437 pam_close_session(sshpam_handle, PAM_SILENT);
438 sshpam_session_open = 0;
440 sshpam_authenticated = 0;
441 pam_end(sshpam_handle, sshpam_err);
442 sshpam_handle = NULL;
446 sshpam_init(const char *user)
448 extern u_int utmp_len;
449 extern char *__progname;
450 const char *pam_rhost, *pam_user;
452 if (sshpam_handle != NULL) {
453 /* We already have a PAM context; check if the user matches */
454 sshpam_err = pam_get_item(sshpam_handle,
455 PAM_USER, (const void **)&pam_user);
456 if (sshpam_err == PAM_SUCCESS && strcmp(user, pam_user) == 0)
458 pam_end(sshpam_handle, sshpam_err);
459 sshpam_handle = NULL;
461 debug("PAM: initializing for \"%s\"", user);
463 pam_start(SSHD_PAM_SERVICE, user, &null_conv, &sshpam_handle);
464 if (sshpam_err != PAM_SUCCESS) {
465 pam_end(sshpam_handle, sshpam_err);
466 sshpam_handle = NULL;
469 pam_rhost = get_remote_name_or_ip(utmp_len, options.use_dns);
470 debug("PAM: setting PAM_RHOST to \"%s\"", pam_rhost);
471 sshpam_err = pam_set_item(sshpam_handle, PAM_RHOST, pam_rhost);
472 if (sshpam_err != PAM_SUCCESS) {
473 pam_end(sshpam_handle, sshpam_err);
474 sshpam_handle = NULL;
477 #ifdef PAM_TTY_KLUDGE
479 * Some silly PAM modules (e.g. pam_time) require a TTY to operate.
480 * sshd doesn't set the tty until too late in the auth process and
481 * may not even set one (for tty-less connections)
483 debug("PAM: setting PAM_TTY to \"ssh\"");
484 sshpam_err = pam_set_item(sshpam_handle, PAM_TTY, "ssh");
485 if (sshpam_err != PAM_SUCCESS) {
486 pam_end(sshpam_handle, sshpam_err);
487 sshpam_handle = NULL;
495 sshpam_init_ctx(Authctxt *authctxt)
497 struct pam_ctxt *ctxt;
500 debug3("PAM: %s entering", __func__);
501 /* Refuse to start if we don't have PAM enabled */
502 if (!options.use_pam)
506 if (sshpam_init(authctxt->user) == -1) {
507 error("PAM: initialization failed");
511 ctxt = xmalloc(sizeof *ctxt);
512 memset(ctxt, 0, sizeof(*ctxt));
514 force_pwchange = &(authctxt->force_pwchange);
516 /* Start the authentication thread */
517 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, socks) == -1) {
518 error("PAM: failed create sockets: %s", strerror(errno));
522 ctxt->pam_psock = socks[0];
523 ctxt->pam_csock = socks[1];
524 if (pthread_create(&ctxt->pam_thread, NULL, sshpam_thread, ctxt) == -1) {
525 error("PAM: failed to start authentication thread: %s",
537 sshpam_query(void *ctx, char **name, char **info,
538 u_int *num, char ***prompts, u_int **echo_on)
541 struct pam_ctxt *ctxt = ctx;
547 debug3("PAM: %s entering", __func__);
548 buffer_init(&buffer);
551 *prompts = xmalloc(sizeof(char *));
554 *echo_on = xmalloc(sizeof(u_int));
555 while (ssh_msg_recv(ctxt->pam_psock, &buffer) == 0) {
556 type = buffer_get_char(&buffer);
557 msg = buffer_get_string(&buffer, NULL);
559 case PAM_PROMPT_ECHO_ON:
560 case PAM_PROMPT_ECHO_OFF:
562 len = plen + strlen(msg) + 1;
563 **prompts = xrealloc(**prompts, len);
564 plen += snprintf(**prompts + plen, len, "%s", msg);
565 **echo_on = (type == PAM_PROMPT_ECHO_ON);
570 /* accumulate messages */
571 len = plen + strlen(msg) + 2;
572 **prompts = xrealloc(**prompts, len);
573 plen += snprintf(**prompts + plen, len, "%s\n", msg);
578 if (**prompts != NULL) {
579 /* drain any accumulated messages */
580 debug("PAM: %s", **prompts);
581 buffer_append(&loginmsg, **prompts,
586 if (type == PAM_SUCCESS) {
587 import_environments(&buffer);
594 error("PAM: %s", msg);
607 /* XXX - see also comment in auth-chall.c:verify_response */
609 sshpam_respond(void *ctx, u_int num, char **resp)
612 struct pam_ctxt *ctxt = ctx;
614 debug2("PAM: %s entering, %d responses", __func__, num);
615 switch (ctxt->pam_done) {
617 sshpam_authenticated = 1;
625 error("PAM: expected one response, got %u", num);
628 buffer_init(&buffer);
629 buffer_put_cstring(&buffer, *resp);
630 if (ssh_msg_send(ctxt->pam_psock, PAM_AUTHTOK, &buffer) == -1) {
631 buffer_free(&buffer);
634 buffer_free(&buffer);
639 sshpam_free_ctx(void *ctxtp)
641 struct pam_ctxt *ctxt = ctxtp;
643 debug3("PAM: %s entering", __func__);
644 sshpam_thread_cleanup();
647 * We don't call sshpam_cleanup() here because we may need the PAM
648 * handle at a later stage, e.g. when setting up a session. It's
649 * still on the cleanup list, so pam_end() *will* be called before
650 * the server process terminates.
654 KbdintDevice sshpam_device = {
662 KbdintDevice mm_sshpam_device = {
671 * This replaces auth-pam.c
674 start_pam(const char *user)
676 if (!options.use_pam)
677 fatal("PAM: initialisation requested when UsePAM=no");
679 if (sshpam_init(user) == -1)
680 fatal("PAM: initialisation failed");
692 if (sshpam_account_status != -1)
693 return (sshpam_account_status);
695 sshpam_err = pam_acct_mgmt(sshpam_handle, 0);
696 debug3("PAM: %s pam_acct_mgmt = %d", __func__, sshpam_err);
698 if (sshpam_err != PAM_SUCCESS && sshpam_err != PAM_NEW_AUTHTOK_REQD) {
699 sshpam_account_status = 0;
700 return (sshpam_account_status);
703 if (sshpam_err == PAM_NEW_AUTHTOK_REQD)
704 pam_password_change_required(1);
706 sshpam_account_status = 1;
707 return (sshpam_account_status);
711 do_pam_set_tty(const char *tty)
714 debug("PAM: setting PAM_TTY to \"%s\"", tty);
715 sshpam_err = pam_set_item(sshpam_handle, PAM_TTY, tty);
716 if (sshpam_err != PAM_SUCCESS)
717 fatal("PAM: failed to set PAM_TTY: %s",
718 pam_strerror(sshpam_handle, sshpam_err));
723 do_pam_setcred(int init)
725 sshpam_err = pam_set_item(sshpam_handle, PAM_CONV,
726 (const void *)&null_conv);
727 if (sshpam_err != PAM_SUCCESS)
728 fatal("PAM: failed to set PAM_CONV: %s",
729 pam_strerror(sshpam_handle, sshpam_err));
731 debug("PAM: establishing credentials");
732 sshpam_err = pam_setcred(sshpam_handle, PAM_ESTABLISH_CRED);
734 debug("PAM: reinitializing credentials");
735 sshpam_err = pam_setcred(sshpam_handle, PAM_REINITIALIZE_CRED);
737 if (sshpam_err == PAM_SUCCESS) {
738 sshpam_cred_established = 1;
741 if (sshpam_authenticated)
742 fatal("PAM: pam_setcred(): %s",
743 pam_strerror(sshpam_handle, sshpam_err));
745 debug("PAM: pam_setcred(): %s",
746 pam_strerror(sshpam_handle, sshpam_err));
750 pam_tty_conv(int n, const struct pam_message **msg,
751 struct pam_response **resp, void *data)
753 char input[PAM_MAX_MSG_SIZE];
754 struct pam_response *reply;
757 debug3("PAM: %s called with %d messages", __func__, n);
761 if (n <= 0 || n > PAM_MAX_NUM_MSG || !isatty(STDIN_FILENO))
762 return (PAM_CONV_ERR);
764 if ((reply = malloc(n * sizeof(*reply))) == NULL)
765 return (PAM_CONV_ERR);
766 memset(reply, 0, n * sizeof(*reply));
768 for (i = 0; i < n; ++i) {
769 switch (PAM_MSG_MEMBER(msg, i, msg_style)) {
770 case PAM_PROMPT_ECHO_OFF:
772 read_passphrase(PAM_MSG_MEMBER(msg, i, msg),
774 reply[i].resp_retcode = PAM_SUCCESS;
776 case PAM_PROMPT_ECHO_ON:
777 fprintf(stderr, "%s\n", PAM_MSG_MEMBER(msg, i, msg));
778 fgets(input, sizeof input, stdin);
779 reply[i].resp = xstrdup(input);
780 reply[i].resp_retcode = PAM_SUCCESS;
784 fprintf(stderr, "%s\n", PAM_MSG_MEMBER(msg, i, msg));
785 reply[i].resp_retcode = PAM_SUCCESS;
792 return (PAM_SUCCESS);
795 for(i = 0; i < n; i++) {
796 if (reply[i].resp != NULL)
797 xfree(reply[i].resp);
800 return (PAM_CONV_ERR);
803 static struct pam_conv tty_conv = { pam_tty_conv, NULL };
806 * XXX this should be done in the authentication phase, but ssh1 doesn't
810 do_pam_chauthtok(void)
813 fatal("Password expired (unable to change with privsep)");
814 sshpam_err = pam_set_item(sshpam_handle, PAM_CONV,
815 (const void *)&tty_conv);
816 if (sshpam_err != PAM_SUCCESS)
817 fatal("PAM: failed to set PAM_CONV: %s",
818 pam_strerror(sshpam_handle, sshpam_err));
819 debug("PAM: changing password");
820 sshpam_err = pam_chauthtok(sshpam_handle, PAM_CHANGE_EXPIRED_AUTHTOK);
821 if (sshpam_err != PAM_SUCCESS)
822 fatal("PAM: pam_chauthtok(): %s",
823 pam_strerror(sshpam_handle, sshpam_err));
827 pam_store_conv(int n, const struct pam_message **msg,
828 struct pam_response **resp, void *data)
830 struct pam_response *reply;
834 debug3("PAM: %s called with %d messages", __func__, n);
837 if (n <= 0 || n > PAM_MAX_NUM_MSG)
838 return (PAM_CONV_ERR);
840 if ((reply = malloc(n * sizeof(*reply))) == NULL)
841 return (PAM_CONV_ERR);
842 memset(reply, 0, n * sizeof(*reply));
844 for (i = 0; i < n; ++i) {
845 switch (PAM_MSG_MEMBER(msg, i, msg_style)) {
848 len = strlen(PAM_MSG_MEMBER(msg, i, msg));
849 buffer_append(&loginmsg, PAM_MSG_MEMBER(msg, i, msg), len);
850 buffer_append(&loginmsg, "\n", 1 );
851 reply[i].resp_retcode = PAM_SUCCESS;
858 return (PAM_SUCCESS);
861 for(i = 0; i < n; i++) {
862 if (reply[i].resp != NULL)
863 xfree(reply[i].resp);
866 return (PAM_CONV_ERR);
869 static struct pam_conv store_conv = { pam_store_conv, NULL };
874 debug3("PAM: opening session");
875 sshpam_err = pam_set_item(sshpam_handle, PAM_CONV,
876 (const void *)&store_conv);
877 if (sshpam_err != PAM_SUCCESS)
878 fatal("PAM: failed to set PAM_CONV: %s",
879 pam_strerror(sshpam_handle, sshpam_err));
880 sshpam_err = pam_open_session(sshpam_handle, 0);
881 if (sshpam_err != PAM_SUCCESS)
882 fatal("PAM: pam_open_session(): %s",
883 pam_strerror(sshpam_handle, sshpam_err));
884 sshpam_session_open = 1;
888 * Set a PAM environment string. We need to do this so that the session
889 * modules can handle things like Kerberos/GSI credentials that appear
890 * during the ssh authentication process.
893 do_pam_putenv(char *name, char *value)
896 #ifdef HAVE_PAM_PUTENV
900 len = strlen(name) + strlen(value) + 2;
901 compound = xmalloc(len);
903 snprintf(compound, len, "%s=%s", name, value);
904 ret = pam_putenv(sshpam_handle, compound);
912 fetch_pam_child_environment(void)
918 fetch_pam_environment(void)
920 return (pam_getenvlist(sshpam_handle));
924 free_pam_environment(char **env)
931 for (envp = env; *envp; envp++)