/*
   Unix SMB/Netbios implementation.
   Version 1.9.
   Password cacheing.  obfuscation is planned

   Copyright (C) Luke Kenneth Casson Leighton 1996-1998

   Copyright (C) 2011-2017
   Free Software Foundation, Inc.

   This file is part of the Midnight Commander.

   The Midnight Commander 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 3 of the License,
   or (at your option) any later version.

   The Midnight Commander 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, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"

extern int DEBUGLEVEL;


/****************************************************************************
initialises a password structure
****************************************************************************/
void
pwd_init (struct pwd_info *pwd)
{
    memset ((char *) pwd->password, '\0', sizeof (pwd->password));
    memset ((char *) pwd->smb_lm_pwd, '\0', sizeof (pwd->smb_lm_pwd));
    memset ((char *) pwd->smb_nt_pwd, '\0', sizeof (pwd->smb_nt_pwd));
    memset ((char *) pwd->smb_lm_owf, '\0', sizeof (pwd->smb_lm_owf));
    memset ((char *) pwd->smb_nt_owf, '\0', sizeof (pwd->smb_nt_owf));

    pwd->null_pwd = True;       /* safest option... */
    pwd->cleartext = False;
    pwd->crypted = False;
}

/****************************************************************************
de-obfuscates a password
****************************************************************************/
static void
pwd_deobfuscate (struct pwd_info *pwd)
{
    (void) pwd;
}

/****************************************************************************
obfuscates a password
****************************************************************************/
static void
pwd_obfuscate (struct pwd_info *pwd)
{
    (void) pwd;
}

/****************************************************************************
sets the obfuscation key info
****************************************************************************/
void
pwd_obfuscate_key (struct pwd_info *pwd, uint32 int_key, char *str_key)
{
    (void) pwd;
    (void) int_key;
    (void) str_key;
}

#if 0
/****************************************************************************
reads a password
****************************************************************************/
void
pwd_read (struct pwd_info *pwd, char *passwd_report, BOOL do_encrypt)
{
    /* grab a password */
    char *user_pass;

    pwd_init (pwd);

    user_pass = (char *) getpass (passwd_report);

    if (user_pass == NULL || user_pass[0] == 0)
    {
        pwd_set_nullpwd (pwd);
    }
    else if (do_encrypt)
    {
        pwd_make_lm_nt_16 (pwd, user_pass);
    }
    else
    {
        pwd_set_cleartext (pwd, user_pass);
    }
}
#endif

/****************************************************************************
 stores a cleartext password
 ****************************************************************************/
void
pwd_set_nullpwd (struct pwd_info *pwd)
{
    pwd_init (pwd);

    pwd->cleartext = False;
    pwd->null_pwd = True;
    pwd->crypted = False;
}

/****************************************************************************
 stores a cleartext password
 ****************************************************************************/
void
pwd_set_cleartext (struct pwd_info *pwd, char *clr)
{
    pwd_init (pwd);
    fstrcpy (pwd->password, clr);
    pwd->cleartext = True;
    pwd->null_pwd = False;
    pwd->crypted = False;

    pwd_obfuscate (pwd);
}

/****************************************************************************
 gets a cleartext password
 ****************************************************************************/
void
pwd_get_cleartext (struct pwd_info *pwd, char *clr)
{
    pwd_deobfuscate (pwd);
    if (pwd->cleartext)
    {
        fstrcpy (clr, pwd->password);
    }
    else
    {
        clr[0] = 0;
    }
    pwd_obfuscate (pwd);
}

/****************************************************************************
 stores lm and nt hashed passwords
 ****************************************************************************/
void
pwd_set_lm_nt_16 (struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
{
    pwd_init (pwd);

    if (lm_pwd)
    {
        memcpy (pwd->smb_lm_pwd, lm_pwd, 16);
    }
    else
    {
        memset ((char *) pwd->smb_lm_pwd, '\0', 16);
    }

    if (nt_pwd)
    {
        memcpy (pwd->smb_nt_pwd, nt_pwd, 16);
    }
    else
    {
        memset ((char *) pwd->smb_nt_pwd, '\0', 16);
    }

    pwd->null_pwd = False;
    pwd->cleartext = False;
    pwd->crypted = False;

    pwd_obfuscate (pwd);
}

/****************************************************************************
 gets lm and nt hashed passwords
 ****************************************************************************/
void
pwd_get_lm_nt_16 (struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
{
    pwd_deobfuscate (pwd);
    if (lm_pwd != NULL)
    {
        memcpy (lm_pwd, pwd->smb_lm_pwd, 16);
    }
    if (nt_pwd != NULL)
    {
        memcpy (nt_pwd, pwd->smb_nt_pwd, 16);
    }
    pwd_obfuscate (pwd);
}

/****************************************************************************
 makes lm and nt hashed passwords
 ****************************************************************************/
void
pwd_make_lm_nt_16 (struct pwd_info *pwd, char *clr)
{
    pwd_init (pwd);

    nt_lm_owf_gen (clr, pwd->smb_nt_pwd, pwd->smb_lm_pwd);
    pwd->null_pwd = False;
    pwd->cleartext = False;
    pwd->crypted = False;

    pwd_obfuscate (pwd);
}

/****************************************************************************
 makes lm and nt OWF crypts
 ****************************************************************************/
void
pwd_make_lm_nt_owf (struct pwd_info *pwd, uchar cryptkey[8])
{
    pwd_deobfuscate (pwd);

#ifdef DEBUG_PASSWORD
    DEBUG (100, ("client cryptkey: "));
    dump_data (100, (char *) cryptkey, 8);
#endif

    SMBOWFencrypt (pwd->smb_nt_pwd, cryptkey, pwd->smb_nt_owf);

#ifdef DEBUG_PASSWORD
    DEBUG (100, ("nt_owf_passwd: "));
    dump_data (100, (char *) pwd->smb_nt_owf, sizeof (pwd->smb_nt_owf));
    DEBUG (100, ("nt_sess_pwd: "));
    dump_data (100, (char *) pwd->smb_nt_pwd, sizeof (pwd->smb_nt_pwd));
#endif

    SMBOWFencrypt (pwd->smb_lm_pwd, cryptkey, pwd->smb_lm_owf);

#ifdef DEBUG_PASSWORD
    DEBUG (100, ("lm_owf_passwd: "));
    dump_data (100, (char *) pwd->smb_lm_owf, sizeof (pwd->smb_lm_owf));
    DEBUG (100, ("lm_sess_pwd: "));
    dump_data (100, (char *) pwd->smb_lm_pwd, sizeof (pwd->smb_lm_pwd));
#endif

    pwd->crypted = True;

    pwd_obfuscate (pwd);
}

/****************************************************************************
 gets lm and nt crypts
 ****************************************************************************/
void
pwd_get_lm_nt_owf (struct pwd_info *pwd, uchar lm_owf[24], uchar nt_owf[24])
{
    pwd_deobfuscate (pwd);
    if (lm_owf != NULL)
    {
        memcpy (lm_owf, pwd->smb_lm_owf, 24);
    }
    if (nt_owf != NULL)
    {
        memcpy (nt_owf, pwd->smb_nt_owf, 24);
    }
    pwd_obfuscate (pwd);
}
