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