freebsd-dev/crypto/openssh/auth-pam.c
Alfred Perlstein 2c917d39b2 Fix some of the handling in the pam module, don't unregister things
that were never registered.  At the same time handle a failure from
pam_setcreds with a bit more paranioa than the previous fix.

Sync a bit with the "Portable OpenSSH" work to make comparisons a easier.
2001-05-09 03:40:37 +00:00

819 lines
21 KiB
C

/*
* Copyright (c) 2000 Damien Miller. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
#ifdef USE_PAM
#include <security/pam_appl.h>
#include "ssh.h"
#include "xmalloc.h"
#include "log.h"
#include "servconf.h"
#include "readpass.h"
#include "canohost.h"
RCSID("$FreeBSD$");
#define NEW_AUTHTOK_MSG \
"Warning: Your password has expired, please change it now"
#define SSHD_PAM_SERVICE "sshd"
#define PAM_STRERROR(a, b) pam_strerror((a), (b))
/* Callbacks */
static int do_pam_conversation(int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr);
void do_pam_cleanup_proc(void *context);
void pam_msg_cat(const char *msg);
/* module-local variables */
static struct pam_conv conv = {
do_pam_conversation,
NULL
};
static pam_handle_t *pamh = NULL;
static const char *pampasswd = NULL;
static char *pam_msg = NULL;
extern ServerOptions options;
/* states for do_pam_conversation() */
typedef enum { INITIAL_LOGIN, OTHER } pamstates;
static pamstates pamstate = INITIAL_LOGIN;
/* remember whether pam_acct_mgmt() returned PAM_NEWAUTHTOK_REQD */
static int password_change_required = 0;
/* remember whether the last pam_authenticate() succeeded or not */
static int was_authenticated = 0;
/* Remember what has been initialised */
static int session_opened = 0;
static int creds_set = 0;
/*
* accessor which allows us to switch conversation structs according to
* the authentication method being used
*/
void do_pam_set_conv(struct pam_conv *conv)
{
pam_set_item(pamh, PAM_CONV, conv);
}
/*
* PAM conversation function.
* There are two states this can run in.
*
* INITIAL_LOGIN mode simply feeds the password from the client into
* PAM in response to PAM_PROMPT_ECHO_OFF, and collects output
* messages with pam_msg_cat(). This is used during initial
* authentication to bypass the normal PAM password prompt.
*
* OTHER mode handles PAM_PROMPT_ECHO_OFF with read_passphrase(prompt, 1)
* and outputs messages to stderr. This mode is used if pam_chauthtok()
* is called to update expired passwords.
*/
static int do_pam_conversation(int num_msg, const struct pam_message **msg,
struct pam_response **resp, void *appdata_ptr)
{
struct pam_response *reply;
int count;
char buf[1024];
/* PAM will free this later */
reply = malloc(num_msg * sizeof(*reply));
if (reply == NULL)
return PAM_CONV_ERR;
for (count = 0; count < num_msg; count++) {
switch ((*msg)[count].msg_style) {
case PAM_PROMPT_ECHO_ON:
if (pamstate == INITIAL_LOGIN) {
free(reply);
return PAM_CONV_ERR;
} else {
fputs((*msg)[count].msg, stderr);
fgets(buf, sizeof(buf), stdin);
reply[count].resp = xstrdup(buf);
reply[count].resp_retcode = PAM_SUCCESS;
break;
}
case PAM_PROMPT_ECHO_OFF:
if (pamstate == INITIAL_LOGIN) {
if (pampasswd == NULL) {
free(reply);
return PAM_CONV_ERR;
}
reply[count].resp = xstrdup(pampasswd);
} else {
reply[count].resp =
xstrdup(read_passphrase((*msg)[count].msg, 1));
}
reply[count].resp_retcode = PAM_SUCCESS;
break;
case PAM_ERROR_MSG:
case PAM_TEXT_INFO:
if ((*msg)[count].msg != NULL) {
if (pamstate == INITIAL_LOGIN)
pam_msg_cat((*msg)[count].msg);
else {
fputs((*msg)[count].msg, stderr);
fputs("\n", stderr);
}
}
reply[count].resp = xstrdup("");
reply[count].resp_retcode = PAM_SUCCESS;
break;
default:
free(reply);
return PAM_CONV_ERR;
}
}
*resp = reply;
return PAM_SUCCESS;
}
/* Called at exit to cleanly shutdown PAM */
void do_pam_cleanup_proc(void *context)
{
int pam_retval;
if (pamh != NULL && session_opened) {
pam_retval = pam_close_session(pamh, 0);
if (pam_retval != PAM_SUCCESS) {
log("Cannot close PAM session[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
if (pamh != NULL && creds_set) {
pam_retval = pam_setcred(pamh, PAM_DELETE_CRED);
if (pam_retval != PAM_SUCCESS) {
debug("Cannot delete credentials[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
if (pamh != NULL) {
pam_retval = pam_end(pamh, pam_retval);
if (pam_retval != PAM_SUCCESS) {
log("Cannot release PAM authentication[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
}
/* Attempt password authentation using PAM */
int auth_pam_password(Authctxt *authctxt, const char *password)
{
struct passwd *pw = authctxt->pw;
int pam_retval;
do_pam_set_conv(&conv);
/* deny if no user. */
if (pw == NULL)
return 0;
if (pw->pw_uid == 0 && options.permit_root_login == 2)
return 0;
if (*password == '\0' && options.permit_empty_passwd == 0)
return 0;
pampasswd = password;
pamstate = INITIAL_LOGIN;
pam_retval = pam_authenticate(pamh, 0);
was_authenticated = (pam_retval == PAM_SUCCESS);
if (pam_retval == PAM_SUCCESS) {
debug("PAM Password authentication accepted for user \"%.100s\"",
pw->pw_name);
return 1;
} else {
debug("PAM Password authentication for \"%.100s\" failed[%d]: %s",
pw->pw_name, pam_retval, PAM_STRERROR(pamh, pam_retval));
return 0;
}
}
/* Do account management using PAM */
int do_pam_account(char *username, char *remote_user)
{
int pam_retval;
do_pam_set_conv(&conv);
debug("PAM setting rhost to \"%.200s\"",
get_canonical_hostname(options.reverse_mapping_check));
pam_retval = pam_set_item(pamh, PAM_RHOST,
get_canonical_hostname(options.reverse_mapping_check));
if (pam_retval != PAM_SUCCESS) {
fatal("PAM set rhost failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
if (remote_user != NULL) {
debug("PAM setting ruser to \"%.200s\"", remote_user);
pam_retval = pam_set_item(pamh, PAM_RUSER, remote_user);
if (pam_retval != PAM_SUCCESS) {
fatal("PAM set ruser failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
pam_retval = pam_acct_mgmt(pamh, 0);
switch (pam_retval) {
case PAM_SUCCESS:
/* This is what we want */
break;
case PAM_NEW_AUTHTOK_REQD:
pam_msg_cat(NEW_AUTHTOK_MSG);
/* flag that password change is necessary */
password_change_required = 1;
break;
default:
log("PAM rejected by account configuration[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
return(0);
}
return(1);
}
/* Do PAM-specific session initialisation */
void do_pam_session(char *username, const char *ttyname)
{
int pam_retval;
do_pam_set_conv(&conv);
if (ttyname != NULL) {
debug("PAM setting tty to \"%.200s\"", ttyname);
pam_retval = pam_set_item(pamh, PAM_TTY, ttyname);
if (pam_retval != PAM_SUCCESS) {
fatal("PAM set tty failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
}
debug("do_pam_session: euid %u, uid %u", geteuid(), getuid());
pam_retval = pam_open_session(pamh, 0);
if (pam_retval != PAM_SUCCESS) {
fatal("PAM session setup failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
session_opened = 1;
}
/* Set PAM credentials */
void do_pam_setcred(void)
{
int pam_retval;
do_pam_set_conv(&conv);
debug("PAM establishing creds");
pam_retval = pam_setcred(pamh, PAM_ESTABLISH_CRED);
if (pam_retval != PAM_SUCCESS) {
if (was_authenticated)
fatal("PAM setcred failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
else
debug("PAM setcred failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
} else
creds_set = 1;
}
/* accessor function for file scope static variable */
int pam_password_change_required(void)
{
return password_change_required;
}
/*
* Have user change authentication token if pam_acct_mgmt() indicated
* it was expired. This needs to be called after an interactive
* session is established and the user's pty is connected to
* stdin/stout/stderr.
*/
void do_pam_chauthtok(void)
{
int pam_retval;
do_pam_set_conv(&conv);
if (password_change_required) {
pamstate = OTHER;
/*
* XXX: should we really loop forever?
*/
do {
pam_retval = pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
if (pam_retval != PAM_SUCCESS) {
log("PAM pam_chauthtok failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
} while (pam_retval != PAM_SUCCESS);
}
}
/* Cleanly shutdown PAM */
void finish_pam(void)
{
do_pam_cleanup_proc(NULL);
fatal_remove_cleanup(&do_pam_cleanup_proc, NULL);
}
/* Start PAM authentication for specified account */
void start_pam(struct passwd *pw)
{
int pam_retval;
debug("Starting up PAM with username \"%.200s\"", pw->pw_name);
pam_retval = pam_start(SSHD_PAM_SERVICE, pw->pw_name, &conv, &pamh);
if (pam_retval != PAM_SUCCESS) {
fatal("PAM initialisation failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
#ifdef PAM_TTY_KLUDGE
/*
* Some PAM modules (e.g. pam_time) require a TTY to operate,
* and will fail in various stupid ways if they don't get one.
* sshd doesn't set the tty until too late in the auth process and may
* not even need one (for tty-less connections)
* Kludge: Set a fake PAM_TTY
*/
pam_retval = pam_set_item(pamh, PAM_TTY, "ssh");
if (pam_retval != PAM_SUCCESS) {
fatal("PAM set tty failed[%d]: %.200s",
pam_retval, PAM_STRERROR(pamh, pam_retval));
}
#endif /* PAM_TTY_KLUDGE */
fatal_add_cleanup(&do_pam_cleanup_proc, NULL);
}
/* Return list of PAM enviornment strings */
char **fetch_pam_environment(void)
{
#ifdef HAVE_PAM_GETENVLIST
return(pam_getenvlist(pamh));
#else /* HAVE_PAM_GETENVLIST */
return(NULL);
#endif /* HAVE_PAM_GETENVLIST */
}
/* Print any messages that have been generated during authentication */
/* or account checking to stderr */
void print_pam_messages(void)
{
if (pam_msg != NULL)
fputs(pam_msg, stderr);
}
/* Append a message to the PAM message buffer */
void pam_msg_cat(const char *msg)
{
char *p;
size_t new_msg_len;
size_t pam_msg_len;
new_msg_len = strlen(msg);
if (pam_msg) {
pam_msg_len = strlen(pam_msg);
pam_msg = xrealloc(pam_msg, new_msg_len + pam_msg_len + 2);
p = pam_msg + pam_msg_len;
} else {
pam_msg = p = xmalloc(new_msg_len + 2);
}
memcpy(p, msg, new_msg_len);
p[new_msg_len] = '\n';
p[new_msg_len + 1] = '\0';
}
struct inverted_pam_userdata {
/*
* Pipe for telling whether we are doing conversation or sending
* authentication results.
*/
int statefd[2];
int challengefd[2];
int responsefd[2];
/* Whether we have sent off our challenge */
int state;
};
#define STATE_CONV 1
#define STATE_AUTH_OK 2
#define STATE_AUTH_FAIL 3
int
ssh_conv(int num_msg, const struct pam_message **msg, struct pam_response **resp,
void *userdata) {
int i;
FILE *reader;
char buf[1024];
struct pam_response *reply = NULL;
char state_to_write = STATE_CONV; /* One char to write */
struct inverted_pam_userdata *ud = userdata;
char *response = NULL;
/* The stdio functions are more convenient for the read half */
reader = fdopen(ud->responsefd[0], "rb");
if (reader == NULL)
goto protocol_failure;
reply = malloc(num_msg * sizeof(struct pam_response));
if (reply == NULL)
return PAM_CONV_ERR;
if (write(ud->statefd[1], &state_to_write, 1) != 1)
goto protocol_failure;
/*
* Re-package our data and send it off to our better half (the actual SSH
* process)
*/
if (write(ud->challengefd[1], buf,
sprintf(buf, "%d\n", num_msg)) == -1)
goto protocol_failure;
for (i = 0; i < num_msg; i++) {
if (write(ud->challengefd[1], buf,
sprintf(buf, "%d\n", msg[i]->msg_style)) == -1)
goto protocol_failure;
if (write(ud->challengefd[1], buf,
sprintf(buf, "%d\n", strlen(msg[i]->msg))) == -1)
goto protocol_failure;
if (write(ud->challengefd[1], msg[i]->msg,
strlen(msg[i]->msg)) == -1)
goto protocol_failure;
}
/*
* Read back responses. These may not be as nice as we want, as the SSH
* protocol isn't exactly a perfect fit with PAM.
*/
for (i = 0; i < num_msg; i++) {
char buf[1024];
char *endptr;
size_t len; /* Length of the response */
switch (msg[i]->msg_style) {
case PAM_PROMPT_ECHO_OFF:
case PAM_PROMPT_ECHO_ON:
if (fgets(buf, sizeof(buf), reader) == NULL)
goto protocol_failure;
len = (size_t)strtoul(buf, &endptr, 10);
/* The length is supposed to stand on a line by itself */
if (endptr == NULL || *endptr != '\n')
goto protocol_failure;
response = malloc(len+1);
if (response == NULL)
goto protocol_failure;
if (fread(response, len, 1, reader) != 1)
goto protocol_failure;
response[len] = '\0';
reply[i].resp = response;
response = NULL;
break;
default:
reply[i].resp = NULL;
break;
}
}
*resp = reply;
return PAM_SUCCESS;
protocol_failure:
free(reply);
return PAM_CONV_ERR;
}
void
ipam_free_cookie(struct inverted_pam_cookie *cookie) {
struct inverted_pam_userdata *ud;
int i;
if (cookie == NULL)
return;
ud = cookie->userdata;
cookie->userdata = NULL;
/* Free userdata if allocated */
if (ud) {
/* Close any opened file descriptors */
if (ud->statefd[0] != -1)
close(ud->statefd[0]);
if (ud->statefd[1] != -1)
close(ud->statefd[1]);
if (ud->challengefd[0] != -1)
close(ud->challengefd[0]);
if (ud->challengefd[1] != -1)
close(ud->challengefd[1]);
if (ud->responsefd[0] != -1)
close(ud->responsefd[0]);
if (ud->responsefd[1] != -1)
close(ud->responsefd[1]);
free(ud);
ud = NULL;
}
/* Now free the normal cookie */
if (cookie->pid != 0 && cookie->pid != -1) {
int status;
/* XXX Use different signal? */
kill(cookie->pid, SIGKILL);
waitpid(cookie->pid, &status, 0);
}
for (i = 0; i < cookie->num_msg; i++) {
if (cookie->resp && cookie->resp[i]) {
free(cookie->resp[i]->resp);
free(cookie->resp[i]);
}
if (cookie->msg && cookie->msg[i]) {
free((void *)cookie->msg[i]->msg);
free(cookie->msg[i]);
}
}
free(cookie->msg);
free(cookie->resp);
free(cookie);
}
/*
* Do first half of PAM authentication - this comes to the point where
* you get a message to send to the user.
*/
struct inverted_pam_cookie *
ipam_start_auth(const char *service, const char *username) {
struct inverted_pam_cookie *cookie;
struct inverted_pam_userdata *ud;
static struct pam_conv conv = {
ssh_conv,
NULL
};
cookie = malloc(sizeof(*cookie));
if (cookie == NULL)
return NULL;
cookie->state = 0;
/* Set up the cookie so ipam_freecookie can be used on it */
cookie->num_msg = 0;
cookie->msg = NULL;
cookie->resp = NULL;
cookie->pid = -1;
ud = calloc(sizeof(*ud), 1);
if (ud == NULL) {
free(cookie);
return NULL;
}
cookie->userdata = ud;
ud->statefd[0] = ud->statefd[1] = -1;
ud->challengefd[0] = ud->challengefd[1] = -1;
ud->responsefd[0] = ud->responsefd[1] = -1;
if (pipe(ud->statefd) != 0) {
ud->statefd[0] = ud->statefd[1] = -1;
ipam_free_cookie(cookie);
return NULL;
}
if (pipe(ud->challengefd) != 0) {
ud->challengefd[0] = ud->challengefd[1] = -1;
ipam_free_cookie(cookie);
return NULL;
}
if (pipe(ud->responsefd) != 0) {
ud->responsefd[0] = ud->responsefd[1] = -1;
ipam_free_cookie(cookie);
return NULL;
}
cookie->pid = fork();
if (cookie->pid == -1) {
ipam_free_cookie(cookie);
return NULL;
} else if (cookie->pid != 0) {
int num_msgs; /* Number of messages from PAM */
char *endptr;
char buf[1024];
FILE *reader;
size_t num_msg;
int i;
char state; /* Which state did the connection just enter? */
/* We are the parent - wait for a call to the communications
function to turn up, or the challenge to be finished */
if (read(ud->statefd[0], &state, 1) != 1) {
ipam_free_cookie(cookie);
return NULL;
}
cookie->state = state;
switch (state) {
case STATE_CONV:
/* We are running the conversation function */
/* The stdio functions are more convenient for read */
reader = fdopen(ud->challengefd[0], "r");
if (reader == NULL) {
ipam_free_cookie(cookie);
return NULL;
}
if (fgets(buf, 4, reader) == NULL) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
num_msg = (size_t)strtoul(buf, &endptr, 10);
/* The length is supposed to stand on a line by itself */
if (endptr == NULL || *endptr != '\n') {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
cookie->msg =
malloc(sizeof(struct pam_message *) * num_msg);
cookie->resp =
malloc(sizeof(struct pam_response *) * num_msg);
if (cookie->msg == NULL || cookie->resp == NULL) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
for (i = 0; i < num_msg; i++) {
cookie->msg[i] =
malloc(sizeof(struct pam_message));
cookie->resp[i] =
malloc(sizeof(struct pam_response));
if (cookie->msg[i] == NULL ||
cookie->resp[i] == NULL) {
for (;;) {
free(cookie->msg[i]);
free(cookie->resp[i]);
if (i == 0)
break;
i--;
}
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
cookie->msg[i]->msg = NULL;
cookie->resp[i]->resp = NULL;
cookie->resp[i]->resp_retcode = 0;
}
/* Set up so the above will be freed on failure */
cookie->num_msg = num_msg;
/*
* We have a an allocated response and message for
* each of the entries in the PAM structure - transfer
* the data sent to the conversation function over.
*/
for (i = 0; i < num_msg; i++) {
size_t len;
if (fgets(buf, sizeof(buf), reader) == NULL) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
cookie->msg[i]->msg_style =
(size_t)strtoul(buf, &endptr, 10);
if (endptr == NULL || *endptr != '\n') {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
if (fgets(buf, sizeof(buf), reader) == NULL) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
len = (size_t)strtoul(buf, &endptr, 10);
if (endptr == NULL || *endptr != '\n') {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
cookie->msg[i]->msg = malloc(len + 1);
if (cookie->msg[i]->msg == NULL) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
if (fread((char *)cookie->msg[i]->msg, len, 1, reader) !=
1) {
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
*(char *)&(cookie->msg[i]->msg[len]) = '\0';
}
break;
case STATE_AUTH_OK:
case STATE_AUTH_FAIL:
break;
default:
/* Internal failure, somehow */
fclose(reader);
ipam_free_cookie(cookie);
return NULL;
}
return cookie;
} else {
/* We are the child */
pam_handle_t *pamh=NULL;
int retval;
char state;
conv.appdata_ptr = ud;
retval = pam_start(service, username, &conv, &pamh);
/* Is user really user? */
if (retval == PAM_SUCCESS)
retval = pam_authenticate(pamh, 0);
/* permitted access? */
if (retval == PAM_SUCCESS)
retval = pam_acct_mgmt(pamh, 0);
/* This is where we have been authorized or not. */
/* Be conservative - flag as auth failure if we can't close */
/*
* XXX This is based on example code from Linux-PAM -
* but can it really be correct to pam_end if
* pam_start failed?
*/
if (pam_end(pamh, retval) != PAM_SUCCESS)
retval = PAM_AUTH_ERR;
/* Message to parent */
state = retval == PAM_SUCCESS ? STATE_AUTH_OK : STATE_AUTH_FAIL;
if (write(ud->statefd[1], &state, 1) != 1) {
_exit(1);
}
/* FDs will be closed, so further communication will stop */
_exit(0);
}
}
/*
* Do second half of PAM authentication - cookie should now be filled
* in with the response to the challenge.
*/
int
ipam_complete_auth(struct inverted_pam_cookie *cookie) {
int i;
char buf[1024];
struct inverted_pam_userdata *ud = cookie->userdata;
char state;
/* Send over our responses */
for (i = 0; i < cookie->num_msg; i++) {
if (cookie->msg[i]->msg_style != PAM_PROMPT_ECHO_ON &&
cookie->msg[i]->msg_style != PAM_PROMPT_ECHO_OFF)
continue;
if (write(ud->responsefd[1], buf,
sprintf(buf, "%d\n", strlen(cookie->resp[i]->resp))) == -1) {
ipam_free_cookie(cookie);
return 0;
}
if (write(ud->responsefd[1], cookie->resp[i]->resp,
strlen(cookie->resp[i]->resp)) == -1) {
ipam_free_cookie(cookie);
return 0;
}
}
/* Find out what state we are changing to */
if (read(ud->statefd[0], &state, 1) != 1) {
ipam_free_cookie(cookie);
return 0;
}
return state == STATE_AUTH_OK ? 1 : 0;
}
#endif /* USE_PAM */