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Damien Millere72b7af1999-12-30 15:08:44 +11001/*
Damien Millere69f18c2000-06-12 16:38:54 +10002 * Copyright (c) 2000 Damien Miller. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
Damien Millere69f18c2000-06-12 16:38:54 +100012 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Damien Millere72b7af1999-12-30 15:08:44 +110023 */
24
25#include "includes.h"
26
27#ifdef USE_PAM
28#include "ssh.h"
29#include "xmalloc.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000030#include "log.h"
Damien Miller63dc3e92001-02-07 12:58:33 +110031#include "auth-pam.h"
Damien Millere72b7af1999-12-30 15:08:44 +110032#include "servconf.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000033#include "canohost.h"
34#include "readpass.h"
Damien Millere72b7af1999-12-30 15:08:44 +110035
Kevin Steves85ecbe72001-04-20 17:43:47 +000036extern char *__progname;
37
Kevin Stevesde77b462001-11-09 20:22:16 +000038RCSID("$Id: auth-pam.c,v 1.41 2001/11/09 20:22:17 stevesk Exp $");
Damien Miller2f6a0ad2000-05-31 11:20:11 +100039
40#define NEW_AUTHTOK_MSG \
Damien Miller9d5705a2000-09-16 16:09:27 +110041 "Warning: Your password has expired, please change it now"
Damien Millere72b7af1999-12-30 15:08:44 +110042
Damien Miller63dc3e92001-02-07 12:58:33 +110043static int do_pam_conversation(int num_msg, const struct pam_message **msg,
44 struct pam_response **resp, void *appdata_ptr);
Damien Millere72b7af1999-12-30 15:08:44 +110045
46/* module-local variables */
47static struct pam_conv conv = {
Damien Miller63dc3e92001-02-07 12:58:33 +110048 do_pam_conversation,
Damien Millere72b7af1999-12-30 15:08:44 +110049 NULL
50};
Damien Miller646aa602001-02-15 11:51:32 +110051static char *__pam_msg = NULL;
52static pam_handle_t *__pamh = NULL;
53static const char *__pampasswd = NULL;
Damien Millere72b7af1999-12-30 15:08:44 +110054
Damien Miller63dc3e92001-02-07 12:58:33 +110055/* states for do_pam_conversation() */
Damien Millerb8481582000-12-03 11:51:51 +110056enum { INITIAL_LOGIN, OTHER } pamstate = INITIAL_LOGIN;
Damien Miller9d5705a2000-09-16 16:09:27 +110057/* remember whether pam_acct_mgmt() returned PAM_NEWAUTHTOK_REQD */
58static int password_change_required = 0;
Damien Millerb8481582000-12-03 11:51:51 +110059/* remember whether the last pam_authenticate() succeeded or not */
60static int was_authenticated = 0;
61
Damien Miller646aa602001-02-15 11:51:32 +110062/* Remember what has been initialised */
63static int session_opened = 0;
64static int creds_set = 0;
65
Damien Millerb8481582000-12-03 11:51:51 +110066/* accessor which allows us to switch conversation structs according to
67 * the authentication method being used */
Damien Miller646aa602001-02-15 11:51:32 +110068void do_pam_set_conv(struct pam_conv *conv)
Damien Millerb8481582000-12-03 11:51:51 +110069{
Damien Miller646aa602001-02-15 11:51:32 +110070 pam_set_item(__pamh, PAM_CONV, conv);
Damien Millerb8481582000-12-03 11:51:51 +110071}
72
73/* start an authentication run */
74int do_pam_authenticate(int flags)
75{
Damien Miller646aa602001-02-15 11:51:32 +110076 int retval = pam_authenticate(__pamh, flags);
Damien Millerb8481582000-12-03 11:51:51 +110077 was_authenticated = (retval == PAM_SUCCESS);
78 return retval;
79}
Damien Miller9d5705a2000-09-16 16:09:27 +110080
81/*
82 * PAM conversation function.
83 * There are two states this can run in.
84 *
85 * INITIAL_LOGIN mode simply feeds the password from the client into
86 * PAM in response to PAM_PROMPT_ECHO_OFF, and collects output
Damien Miller646aa602001-02-15 11:51:32 +110087 * messages with into __pam_msg. This is used during initial
Damien Miller9d5705a2000-09-16 16:09:27 +110088 * authentication to bypass the normal PAM password prompt.
89 *
Damien Miller09256482001-10-28 22:36:55 +110090 * OTHER mode handles PAM_PROMPT_ECHO_OFF with read_passphrase()
Damien Miller9d5705a2000-09-16 16:09:27 +110091 * and outputs messages to stderr. This mode is used if pam_chauthtok()
92 * is called to update expired passwords.
93 */
Damien Miller63dc3e92001-02-07 12:58:33 +110094static int do_pam_conversation(int num_msg, const struct pam_message **msg,
Damien Millere72b7af1999-12-30 15:08:44 +110095 struct pam_response **resp, void *appdata_ptr)
96{
97 struct pam_response *reply;
98 int count;
Damien Miller9d5705a2000-09-16 16:09:27 +110099 char buf[1024];
Damien Millere72b7af1999-12-30 15:08:44 +1100100
101 /* PAM will free this later */
102 reply = malloc(num_msg * sizeof(*reply));
103 if (reply == NULL)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000104 return PAM_CONV_ERR;
Damien Millere72b7af1999-12-30 15:08:44 +1100105
Damien Miller9d5705a2000-09-16 16:09:27 +1100106 for (count = 0; count < num_msg; count++) {
Damien Miller63dc3e92001-02-07 12:58:33 +1100107 if (pamstate == INITIAL_LOGIN) {
108 /*
109 * We can't use stdio yet, queue messages for
110 * printing later
111 */
112 switch(PAM_MSG_MEMBER(msg, count, msg_style)) {
Damien Miller9d5705a2000-09-16 16:09:27 +1100113 case PAM_PROMPT_ECHO_ON:
Damien Miller63dc3e92001-02-07 12:58:33 +1100114 free(reply);
115 return PAM_CONV_ERR;
116 case PAM_PROMPT_ECHO_OFF:
Damien Miller646aa602001-02-15 11:51:32 +1100117 if (__pampasswd == NULL) {
Damien Miller60819b42000-10-14 11:16:12 +1100118 free(reply);
119 return PAM_CONV_ERR;
Damien Miller60819b42000-10-14 11:16:12 +1100120 }
Damien Miller646aa602001-02-15 11:51:32 +1100121 reply[count].resp = xstrdup(__pampasswd);
Damien Millere72b7af1999-12-30 15:08:44 +1100122 reply[count].resp_retcode = PAM_SUCCESS;
Damien Miller9d5705a2000-09-16 16:09:27 +1100123 break;
124 case PAM_ERROR_MSG:
125 case PAM_TEXT_INFO:
126 if ((*msg)[count].msg != NULL) {
Damien Miller646aa602001-02-15 11:51:32 +1100127 message_cat(&__pam_msg,
Damien Miller63dc3e92001-02-07 12:58:33 +1100128 PAM_MSG_MEMBER(msg, count, msg));
Damien Miller9d5705a2000-09-16 16:09:27 +1100129 }
Damien Millere72b7af1999-12-30 15:08:44 +1100130 reply[count].resp = xstrdup("");
Damien Miller9d5705a2000-09-16 16:09:27 +1100131 reply[count].resp_retcode = PAM_SUCCESS;
Damien Millere72b7af1999-12-30 15:08:44 +1100132 break;
Damien Millere72b7af1999-12-30 15:08:44 +1100133 default:
134 free(reply);
135 return PAM_CONV_ERR;
Damien Miller63dc3e92001-02-07 12:58:33 +1100136 }
137 } else {
138 /*
139 * stdio is connected, so interact directly
140 */
141 switch(PAM_MSG_MEMBER(msg, count, msg_style)) {
142 case PAM_PROMPT_ECHO_ON:
143 fputs(PAM_MSG_MEMBER(msg, count, msg), stderr);
144 fgets(buf, sizeof(buf), stdin);
145 reply[count].resp = xstrdup(buf);
146 reply[count].resp_retcode = PAM_SUCCESS;
147 break;
148 case PAM_PROMPT_ECHO_OFF:
Damien Miller09256482001-10-28 22:36:55 +1100149 reply[count].resp =
Kevin Stevesfe2f4a12001-10-28 17:32:38 +0000150 read_passphrase(PAM_MSG_MEMBER(msg, count,
151 msg), RP_ALLOW_STDIN);
Damien Miller63dc3e92001-02-07 12:58:33 +1100152 reply[count].resp_retcode = PAM_SUCCESS;
153 break;
154 case PAM_ERROR_MSG:
155 case PAM_TEXT_INFO:
156 if ((*msg)[count].msg != NULL)
157 fprintf(stderr, "%s\n",
158 PAM_MSG_MEMBER(msg, count, msg));
159 reply[count].resp = xstrdup("");
160 reply[count].resp_retcode = PAM_SUCCESS;
161 break;
162 default:
163 free(reply);
164 return PAM_CONV_ERR;
165 }
Damien Millere72b7af1999-12-30 15:08:44 +1100166 }
167 }
168
169 *resp = reply;
170
171 return PAM_SUCCESS;
172}
173
174/* Called at exit to cleanly shutdown PAM */
Damien Miller646aa602001-02-15 11:51:32 +1100175void do_pam_cleanup_proc(void *context)
Damien Millere72b7af1999-12-30 15:08:44 +1100176{
Damien Miller2e9adb22001-03-21 12:16:24 +1100177 int pam_retval = PAM_SUCCESS;
Damien Millere72b7af1999-12-30 15:08:44 +1100178
Damien Miller646aa602001-02-15 11:51:32 +1100179 if (__pamh && session_opened) {
180 pam_retval = pam_close_session(__pamh, 0);
Damien Miller63dc3e92001-02-07 12:58:33 +1100181 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000182 log("Cannot close PAM session[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100183 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller3dfeee42001-02-14 00:43:55 +1100184 }
Damien Millere72b7af1999-12-30 15:08:44 +1100185
Damien Miller646aa602001-02-15 11:51:32 +1100186 if (__pamh && creds_set) {
187 pam_retval = pam_setcred(__pamh, PAM_DELETE_CRED);
Damien Miller63dc3e92001-02-07 12:58:33 +1100188 if (pam_retval != PAM_SUCCESS)
189 debug("Cannot delete credentials[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100190 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller3dfeee42001-02-14 00:43:55 +1100191 }
Damien Millere72b7af1999-12-30 15:08:44 +1100192
Damien Miller646aa602001-02-15 11:51:32 +1100193 if (__pamh) {
194 pam_retval = pam_end(__pamh, pam_retval);
Damien Miller63dc3e92001-02-07 12:58:33 +1100195 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000196 log("Cannot release PAM authentication[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100197 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Millere72b7af1999-12-30 15:08:44 +1100198 }
199}
200
201/* Attempt password authentation using PAM */
202int auth_pam_password(struct passwd *pw, const char *password)
203{
204 extern ServerOptions options;
205 int pam_retval;
206
Damien Miller646aa602001-02-15 11:51:32 +1100207 do_pam_set_conv(&conv);
Damien Millerb8481582000-12-03 11:51:51 +1100208
Damien Millere72b7af1999-12-30 15:08:44 +1100209 /* deny if no user. */
210 if (pw == NULL)
211 return 0;
Kevin Steves706e7a92001-04-23 18:38:37 +0000212 if (pw->pw_uid == 0 && options.permit_root_login == PERMIT_NO_PASSWD)
Damien Millere72b7af1999-12-30 15:08:44 +1100213 return 0;
214 if (*password == '\0' && options.permit_empty_passwd == 0)
215 return 0;
216
Damien Miller646aa602001-02-15 11:51:32 +1100217 __pampasswd = password;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000218
Damien Miller9d5705a2000-09-16 16:09:27 +1100219 pamstate = INITIAL_LOGIN;
Kevin Stevesde77b462001-11-09 20:22:16 +0000220 pam_retval = do_pam_authenticate(
221 options.permit_empty_passwd == 0 ? PAM_DISALLOW_NULL_AUTHTOK : 0);
Damien Millere72b7af1999-12-30 15:08:44 +1100222 if (pam_retval == PAM_SUCCESS) {
Damien Miller63dc3e92001-02-07 12:58:33 +1100223 debug("PAM Password authentication accepted for "
224 "user \"%.100s\"", pw->pw_name);
Damien Millere72b7af1999-12-30 15:08:44 +1100225 return 1;
226 } else {
Damien Miller63dc3e92001-02-07 12:58:33 +1100227 debug("PAM Password authentication for \"%.100s\" "
228 "failed[%d]: %s", pw->pw_name, pam_retval,
Damien Miller646aa602001-02-15 11:51:32 +1100229 PAM_STRERROR(__pamh, pam_retval));
Damien Millere72b7af1999-12-30 15:08:44 +1100230 return 0;
231 }
232}
233
234/* Do account management using PAM */
235int do_pam_account(char *username, char *remote_user)
236{
237 int pam_retval;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000238
Damien Miller646aa602001-02-15 11:51:32 +1100239 do_pam_set_conv(&conv);
Damien Miller63dc3e92001-02-07 12:58:33 +1100240
Damien Miller63dc3e92001-02-07 12:58:33 +1100241 if (remote_user) {
Damien Millere72b7af1999-12-30 15:08:44 +1100242 debug("PAM setting ruser to \"%.200s\"", remote_user);
Damien Miller646aa602001-02-15 11:51:32 +1100243 pam_retval = pam_set_item(__pamh, PAM_RUSER, remote_user);
Damien Miller63dc3e92001-02-07 12:58:33 +1100244 if (pam_retval != PAM_SUCCESS)
245 fatal("PAM set ruser failed[%d]: %.200s", pam_retval,
Damien Miller646aa602001-02-15 11:51:32 +1100246 PAM_STRERROR(__pamh, pam_retval));
Damien Millere72b7af1999-12-30 15:08:44 +1100247 }
248
Damien Miller646aa602001-02-15 11:51:32 +1100249 pam_retval = pam_acct_mgmt(__pamh, 0);
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000250 switch (pam_retval) {
251 case PAM_SUCCESS:
252 /* This is what we want */
253 break;
254 case PAM_NEW_AUTHTOK_REQD:
Damien Miller646aa602001-02-15 11:51:32 +1100255 message_cat(&__pam_msg, NEW_AUTHTOK_MSG);
Damien Miller9d5705a2000-09-16 16:09:27 +1100256 /* flag that password change is necessary */
257 password_change_required = 1;
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000258 break;
259 default:
Damien Miller63dc3e92001-02-07 12:58:33 +1100260 log("PAM rejected by account configuration[%d]: "
Damien Miller646aa602001-02-15 11:51:32 +1100261 "%.200s", pam_retval, PAM_STRERROR(__pamh,
Damien Miller63dc3e92001-02-07 12:58:33 +1100262 pam_retval));
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000263 return(0);
Damien Millere72b7af1999-12-30 15:08:44 +1100264 }
Kevin Stevesef4eea92001-02-05 12:42:17 +0000265
Damien Millere72b7af1999-12-30 15:08:44 +1100266 return(1);
267}
268
269/* Do PAM-specific session initialisation */
Damien Miller3e955e72000-01-27 10:55:38 +1100270void do_pam_session(char *username, const char *ttyname)
Damien Millere72b7af1999-12-30 15:08:44 +1100271{
272 int pam_retval;
273
Damien Miller882c2ee2001-03-01 09:18:57 +1100274 do_pam_set_conv(&conv);
275
Damien Millere72b7af1999-12-30 15:08:44 +1100276 if (ttyname != NULL) {
277 debug("PAM setting tty to \"%.200s\"", ttyname);
Damien Miller646aa602001-02-15 11:51:32 +1100278 pam_retval = pam_set_item(__pamh, PAM_TTY, ttyname);
Damien Miller63dc3e92001-02-07 12:58:33 +1100279 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000280 fatal("PAM set tty failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100281 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Millere72b7af1999-12-30 15:08:44 +1100282 }
283
Damien Miller646aa602001-02-15 11:51:32 +1100284 pam_retval = pam_open_session(__pamh, 0);
Damien Miller63dc3e92001-02-07 12:58:33 +1100285 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000286 fatal("PAM session setup failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100287 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller31a501d2001-02-27 09:20:48 +1100288
Damien Miller3dfeee42001-02-14 00:43:55 +1100289 session_opened = 1;
Damien Millere72b7af1999-12-30 15:08:44 +1100290}
291
Kevin Stevesef4eea92001-02-05 12:42:17 +0000292/* Set PAM credentials */
Damien Millerf9e93002001-03-27 16:12:24 +1000293void do_pam_setcred(int init)
Damien Millere72b7af1999-12-30 15:08:44 +1100294{
295 int pam_retval;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000296
Damien Miller882c2ee2001-03-01 09:18:57 +1100297 do_pam_set_conv(&conv);
298
Damien Millere72b7af1999-12-30 15:08:44 +1100299 debug("PAM establishing creds");
Damien Millerf9e93002001-03-27 16:12:24 +1000300 pam_retval = pam_setcred(__pamh,
301 init ? PAM_ESTABLISH_CRED : PAM_REINITIALIZE_CRED);
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000302 if (pam_retval != PAM_SUCCESS) {
Damien Miller63dc3e92001-02-07 12:58:33 +1100303 if (was_authenticated)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000304 fatal("PAM setcred failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100305 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller63dc3e92001-02-07 12:58:33 +1100306 else
Kevin Stevesef4eea92001-02-05 12:42:17 +0000307 debug("PAM setcred failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100308 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller3dfeee42001-02-14 00:43:55 +1100309 } else
310 creds_set = 1;
Damien Miller9d5705a2000-09-16 16:09:27 +1100311}
312
Kevin Steves092f2ef2000-10-14 13:36:13 +0000313/* accessor function for file scope static variable */
Damien Miller646aa602001-02-15 11:51:32 +1100314int is_pam_password_change_required(void)
Kevin Steves092f2ef2000-10-14 13:36:13 +0000315{
316 return password_change_required;
317}
318
Kevin Stevesef4eea92001-02-05 12:42:17 +0000319/*
Damien Miller9d5705a2000-09-16 16:09:27 +1100320 * Have user change authentication token if pam_acct_mgmt() indicated
321 * it was expired. This needs to be called after an interactive
322 * session is established and the user's pty is connected to
323 * stdin/stout/stderr.
324 */
Kevin Steves6beac8c2000-10-14 15:08:49 +0000325void do_pam_chauthtok(void)
Damien Miller9d5705a2000-09-16 16:09:27 +1100326{
327 int pam_retval;
328
Damien Miller882c2ee2001-03-01 09:18:57 +1100329 do_pam_set_conv(&conv);
330
Damien Miller9d5705a2000-09-16 16:09:27 +1100331 if (password_change_required) {
332 pamstate = OTHER;
Damien Millerec7e1b12001-03-21 13:01:35 +1100333 pam_retval = pam_chauthtok(__pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
334 if (pam_retval != PAM_SUCCESS)
335 fatal("PAM pam_chauthtok failed[%d]: %.200s",
336 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000337 }
Damien Millere72b7af1999-12-30 15:08:44 +1100338}
339
340/* Cleanly shutdown PAM */
341void finish_pam(void)
342{
Damien Miller646aa602001-02-15 11:51:32 +1100343 do_pam_cleanup_proc(NULL);
344 fatal_remove_cleanup(&do_pam_cleanup_proc, NULL);
Damien Millere72b7af1999-12-30 15:08:44 +1100345}
346
347/* Start PAM authentication for specified account */
Damien Miller22e22bf2001-01-19 15:46:38 +1100348void start_pam(const char *user)
Damien Millere72b7af1999-12-30 15:08:44 +1100349{
350 int pam_retval;
Damien Millerac2b1a52001-02-11 22:39:19 +1100351 extern ServerOptions options;
Kevin Steves5f3b9b92001-04-23 17:28:28 +0000352 extern u_int utmp_len;
353 const char *rhost;
Damien Millere72b7af1999-12-30 15:08:44 +1100354
Damien Miller22e22bf2001-01-19 15:46:38 +1100355 debug("Starting up PAM with username \"%.200s\"", user);
Damien Millere72b7af1999-12-30 15:08:44 +1100356
Damien Miller646aa602001-02-15 11:51:32 +1100357 pam_retval = pam_start(SSHD_PAM_SERVICE, user, &conv, &__pamh);
Damien Millere72b7af1999-12-30 15:08:44 +1100358
Damien Miller63dc3e92001-02-07 12:58:33 +1100359 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000360 fatal("PAM initialisation failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100361 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Millerbd5817d2001-02-11 22:35:11 +1100362
Kevin Steves5f3b9b92001-04-23 17:28:28 +0000363 rhost = get_remote_name_or_ip(utmp_len, options.reverse_mapping_check);
364 debug("PAM setting rhost to \"%.200s\"", rhost);
365
366 pam_retval = pam_set_item(__pamh, PAM_RHOST, rhost);
Damien Millerbd5817d2001-02-11 22:35:11 +1100367 if (pam_retval != PAM_SUCCESS)
368 fatal("PAM set rhost failed[%d]: %.200s", pam_retval,
Damien Miller646aa602001-02-15 11:51:32 +1100369 PAM_STRERROR(__pamh, pam_retval));
Damien Miller4e997202000-07-09 21:21:52 +1000370#ifdef PAM_TTY_KLUDGE
Damien Millerc19fd5f2000-06-22 21:44:54 +1000371 /*
372 * Some PAM modules (e.g. pam_time) require a TTY to operate,
Kevin Stevesef4eea92001-02-05 12:42:17 +0000373 * and will fail in various stupid ways if they don't get one.
Damien Millerc19fd5f2000-06-22 21:44:54 +1000374 * sshd doesn't set the tty until too late in the auth process and may
375 * not even need one (for tty-less connections)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000376 * Kludge: Set a fake PAM_TTY
Damien Millerc19fd5f2000-06-22 21:44:54 +1000377 */
Damien Miller33cdd9e2001-10-28 22:33:48 +1100378 pam_retval = pam_set_item(__pamh, PAM_TTY, "NODEVssh");
Damien Miller63dc3e92001-02-07 12:58:33 +1100379 if (pam_retval != PAM_SUCCESS)
Kevin Stevesef4eea92001-02-05 12:42:17 +0000380 fatal("PAM set tty failed[%d]: %.200s",
Damien Miller646aa602001-02-15 11:51:32 +1100381 pam_retval, PAM_STRERROR(__pamh, pam_retval));
Damien Miller4e997202000-07-09 21:21:52 +1000382#endif /* PAM_TTY_KLUDGE */
Damien Miller7b22d652000-06-18 14:07:04 +1000383
Damien Miller646aa602001-02-15 11:51:32 +1100384 fatal_add_cleanup(&do_pam_cleanup_proc, NULL);
Damien Millere72b7af1999-12-30 15:08:44 +1100385}
386
387/* Return list of PAM enviornment strings */
388char **fetch_pam_environment(void)
389{
Damien Miller1bead332000-04-30 00:47:29 +1000390#ifdef HAVE_PAM_GETENVLIST
Damien Miller646aa602001-02-15 11:51:32 +1100391 return(pam_getenvlist(__pamh));
Damien Miller1bead332000-04-30 00:47:29 +1000392#else /* HAVE_PAM_GETENVLIST */
393 return(NULL);
394#endif /* HAVE_PAM_GETENVLIST */
Damien Millere72b7af1999-12-30 15:08:44 +1100395}
396
397/* Print any messages that have been generated during authentication */
398/* or account checking to stderr */
399void print_pam_messages(void)
400{
Damien Miller646aa602001-02-15 11:51:32 +1100401 if (__pam_msg != NULL)
402 fputs(__pam_msg, stderr);
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000403}
404
Damien Miller63dc3e92001-02-07 12:58:33 +1100405/* Append a message to buffer */
406void message_cat(char **p, const char *a)
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000407{
Damien Miller63dc3e92001-02-07 12:58:33 +1100408 char *cp;
409 size_t new_len;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000410
Damien Miller63dc3e92001-02-07 12:58:33 +1100411 new_len = strlen(a);
Kevin Stevesef4eea92001-02-05 12:42:17 +0000412
Damien Miller63dc3e92001-02-07 12:58:33 +1100413 if (*p) {
414 size_t len = strlen(*p);
Damien Miller2f6a0ad2000-05-31 11:20:11 +1000415
Damien Miller63dc3e92001-02-07 12:58:33 +1100416 *p = xrealloc(*p, new_len + len + 2);
417 cp = *p + len;
418 } else
419 *p = cp = xmalloc(new_len + 2);
420
421 memcpy(cp, a, new_len);
422 cp[new_len] = '\n';
423 cp[new_len + 1] = '\0';
Damien Millere72b7af1999-12-30 15:08:44 +1100424}
425
426#endif /* USE_PAM */