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/*
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005-2006
*/
/**
*
* @file verify_user.c
* @brief Authenticate user using standard unix passwd/shadow system
* @author Jay Sorg, Simone Fedele
*
*/
#include "sesman.h"
#define _XOPEN_SOURCE
#include <stdio.h>
#include <sys/types.h>
#include <crypt.h>
#include <shadow.h>
#include <pwd.h>
#ifndef SECS_PER_DAY
#define SECS_PER_DAY (24L*3600L)
#endif
extern struct config_sesman g_cfg;
static int DEFAULT_CC
auth_account_disabled(struct spwd* stp);
/******************************************************************************/
/* returns boolean */
long DEFAULT_CC
auth_userpass(char* user, char* pass)
{
char salt[13] = "$1$";
char hash[35] = "";
char* encr = 0;
struct passwd* spw;
struct spwd* stp;
int saltcnt = 0;
spw = getpwnam(user);
if (spw == 0)
{
return 0;
}
if (g_strncmp(spw->pw_passwd, "x", 3) == 0)
{
/* the system is using shadow */
stp = getspnam(user);
if (stp == 0)
{
return 0;
}
if (1==auth_account_disabled(stp))
{
log_message(LOG_LEVEL_INFO, "account %s is disabled", user);
return 0;
}
g_strncpy(hash, stp->sp_pwdp, 34);
}
else
{
/* old system with only passwd */
g_strncpy(hash, spw->pw_passwd, 34);
}
hash[34] = '\0';
if (g_strncmp(hash, "$1$", 3) == 0)
{
/* gnu style crypt(); */
saltcnt = 3;
while ((hash[saltcnt] != '$') && (saltcnt < 11))
{
salt[saltcnt] = hash[saltcnt];
saltcnt++;
}
salt[saltcnt] = '$';
salt[saltcnt + 1] = '\0';
}
else
{
/* classic two char salt */
salt[0] = hash[0];
salt[1] = hash[1];
salt[2] = '\0';
}
encr = crypt(pass,salt);
if (g_strncmp(encr, hash, 34) != 0)
{
return 0;
}
return 1;
}
/******************************************************************************/
/* returns error */
int DEFAULT_CC
auth_start_session(long in_val, int in_display)
{
return 0;
}
/******************************************************************************/
int DEFAULT_CC
auth_end(long in_val)
{
return 0;
}
/******************************************************************************/
int DEFAULT_CC
auth_set_env(long in_val)
{
return 0;
}
#define AUTH_NO_PWD_CHANGE 0
#define AUTH_PWD_CHANGE 1
/******************************************************************************/
int DEFAULT_CC
auth_check_pwd_chg(char* user)
{
struct passwd* spw;
struct spwd* stp;
int now;
long today;
spw = getpwnam(user);
if (spw == 0)
{
return AUTH_NO_PWD_CHANGE;
}
if (g_strncmp(spw->pw_passwd, "x", 3) != 0)
{
/* old system with only passwd */
return AUTH_NO_PWD_CHANGE;
}
/* the system is using shadow */
stp = getspnam(user);
if (stp == 0)
{
return AUTH_NO_PWD_CHANGE;
}
/* check if we need a pwd change */
now=g_time1();
today=now/SECS_PER_DAY;
if (today >= (stp->sp_lstchg + stp->sp_max - stp->sp_warn))
{
return AUTH_PWD_CHANGE;
}
if (today < ((stp->sp_lstchg)+(stp->sp_min)))
{
/* cannot change pwd for now */
return AUTH_NO_PWD_CHANGE;
}
return AUTH_NO_PWD_CHANGE;
}
/**
*
* @return 1 if the account is disabled, 0 otherwise
*
*/
static int DEFAULT_CC
auth_account_disabled(struct spwd* stp)
{
int today;
if (0==stp)
{
/* if an invalid struct was passed we assume a disabled account */
return 1;
}
today=g_time1()/SECS_PER_DAY;
LOG_DBG("last %d",stp->sp_lstchg);
LOG_DBG("min %d",stp->sp_min);
LOG_DBG("max %d",stp->sp_max);
LOG_DBG("inact %d",stp->sp_inact);
LOG_DBG("warn %d",stp->sp_warn);
LOG_DBG("expire %d",stp->sp_expire);
LOG_DBG("today %d",today);
if ((stp->sp_expire != -1) && (today >= stp->sp_expire))
{
return 1;
}
if (today >= (stp->sp_lstchg+stp->sp_max+stp->sp_inact))
{
return 1;
}
return 0;
}
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