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/**
* @file
*
* @brief Shell login check function.
*/
/*
* Copyright (c) 2009-2014 embedded brains GmbH and others.
*
* embedded brains GmbH
* Dornierstr. 4
* D-82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* Based on work from Chris Johns and Fernando Ruiz.
*
* Derived from file "cpukit/libmisc/shell/shell.c".
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/types.h>
#include <unistd.h>
#include <pwd.h>
#include <string.h>
#include <crypt.h>
#include <rtems/shell.h>
#include <rtems/userenv.h>
bool rtems_shell_login_check(
const char *user,
const char *passphrase
)
{
char buf[256];
struct passwd *pw_res;
struct passwd pw;
int eno;
bool ok;
eno = getpwnam_r(user, &pw, &buf[0], sizeof(buf), &pw_res);
/* Valid user? */
if (eno == 0 && strcmp(pw.pw_passwd, "*") != 0) {
if (strcmp(pw.pw_passwd, "") == 0) {
ok = true;
} else if (strcmp(pw.pw_passwd, "x") == 0) {
/* TODO: /etc/shadow */
ok = false;
} else {
struct crypt_data data;
char *s;
s = crypt_r(passphrase, pw.pw_passwd, &data);
ok = strcmp(s, pw.pw_passwd) == 0;
}
} else {
ok = false;
}
if (ok && strcmp(pw.pw_dir, "") != 0) {
ok = chroot(pw.pw_dir) == 0;
}
if (ok) {
rtems_shell_env_t *env = rtems_shell_get_current_env();
if (env != NULL) {
chown(env->devname, pw.pw_uid, 0);
}
setuid(pw.pw_uid);
setgid(pw.pw_gid);
seteuid(pw.pw_uid);
setegid(pw.pw_gid);
rtems_current_user_env_getgroups();
}
return ok;
}
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