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/*
Unix SMB/CIFS implementation.
smbpasswd file format routines
Copyright (C) Andrew Tridgell 1992-1998
Modified by Jeremy Allison 1995.
Modified by Gerald (Jerry) Carter 2000-2001
Copyright (C) Tim Potter 2001
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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.
*/
/*! \file lib/smbpasswd.c
The smbpasswd file is used to store encrypted passwords in a similar
fashion to the /etc/passwd file. The format is colon separated fields
with one user per line like so:
<username>:<uid>:<lanman hash>:<nt hash>:<acb info>:<last change time>
The username and uid must correspond to an entry in the /etc/passwd
file. The lanman and nt password hashes are 32 hex digits corresponding
to the 16-byte lanman and nt hashes respectively.
The password last change time is stored as a string of the format
LCD-<change time> where the change time is expressed as an
'N' No password
'D' Disabled
'H' Homedir required
'T' Temp account.
'U' User account (normal)
'M' MNS logon user account - what is this ?
'W' Workstation account
'S' Server account
'L' Locked account
'X' No Xpiry on password
'I' Interdomain trust account
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_samr.h"
#include "system/iconv.h"
/*! Convert 32 hex characters into a 16 byte array. */
struct samr_Password *smbpasswd_gethexpwd(TALLOC_CTX *mem_ctx, char *p)
{
int i;
unsigned char lonybble, hinybble;
const char *hexchars = "0123456789ABCDEF";
char *p1, *p2;
struct samr_Password *pwd = talloc(mem_ctx, struct samr_Password);
if (!p) return NULL;
for (i = 0; i < (sizeof(pwd->hash) * 2); i += 2)
{
hinybble = toupper(p[i]);
lonybble = toupper(p[i + 1]);
p1 = strchr_m(hexchars, hinybble);
p2 = strchr_m(hexchars, lonybble);
if (!p1 || !p2)
{
return (False);
}
hinybble = PTR_DIFF(p1, hexchars);
lonybble = PTR_DIFF(p2, hexchars);
pwd->hash[i / 2] = (hinybble << 4) | lonybble;
}
return pwd;
}
/*! Convert a 16-byte array into 32 hex characters. */
struct samr_Password *lm_hash_p = NULL;
struct samr_Password *nt_hash_p = NULL;
char *smbpasswd_sethexpwd(TALLOC_CTX *mem_ctx, struct samr_Password *pwd, uint16_t acb_info)
{
char *p;
if (pwd != NULL) {
int i;
p = talloc_array(mem_ctx, char, 33);
if (!p) {
return NULL;
}
for (i = 0; i < sizeof(pwd->hash); i++)
slprintf(&p[i*2], 3, "%02X", pwd->hash[i]);
} else {
if (acb_info & ACB_PWNOTREQ)
p = talloc_strdup(mem_ctx, "NO PASSWORDXXXXXXXXXXXXXXXXXXXXX");
else
p = talloc_strdup(mem_ctx, "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
}
return p;
}
/*! Decode the account control bits (ACB) info from a string. */
uint16_t smbpasswd_decode_acb_info(const char *p)
{
uint16_t acb_info = 0;
BOOL finished = False;
/*
* Check if the account type bits have been encoded after the
* NT password (in the form [NDHTUWSLXI]).
*/
if (*p != '[') return 0;
for (p++; *p && !finished; p++)
{
switch (*p) {
case 'N': /* 'N'o password. */
acb_info |= ACB_PWNOTREQ;
break;
case 'D': /* 'D'isabled. */
acb_info |= ACB_DISABLED;
break;
case 'H': /* 'H'omedir required. */
acb_info |= ACB_HOMDIRREQ;
break;
case 'T': /* 'T'emp account. */
acb_info |= ACB_TEMPDUP;
break;
case 'U': /* 'U'ser account (normal). */
acb_info |= ACB_NORMAL;
break;
case 'M': /* 'M'NS logon user account. What is this ? */
acb_info |= ACB_MNS;
break;
case 'W': /* 'W'orkstation account. */
acb_info |= ACB_WSTRUST;
break;
case 'S': /* 'S'erver account. */
acb_info |= ACB_SVRTRUST;
break;
case 'L': /* 'L'ocked account. */
acb_info |= ACB_AUTOLOCK;
break;
case 'X': /* No 'X'piry on password */
acb_info |= ACB_PWNOEXP;
break;
case 'I': /* 'I'nterdomain trust account. */
acb_info |= ACB_DOMTRUST;
break;
case ' ':
break;
case ':':
case '\n':
case '\0':
case ']':
default:
finished = True;
break;
}
}
return acb_info;
}
/*! Encode account control bits (ACBs) into a string. */
char *smbpasswd_encode_acb_info(TALLOC_CTX *mem_ctx, uint16_t acb_info)
{
char *acct_str = talloc_array(mem_ctx, char, 35);
size_t i = 0;
acct_str[i++] = '[';
if (acb_info & ACB_PWNOTREQ ) acct_str[i++] = 'N';
if (acb_info & ACB_DISABLED ) acct_str[i++] = 'D';
if (acb_info & ACB_HOMDIRREQ) acct_str[i++] = 'H';
if (acb_info & ACB_TEMPDUP ) acct_str[i++] = 'T';
if (acb_info & ACB_NORMAL ) acct_str[i++] = 'U';
if (acb_info & ACB_MNS ) acct_str[i++] = 'M';
if (acb_info & ACB_WSTRUST ) acct_str[i++] = 'W';
if (acb_info & ACB_SVRTRUST ) acct_str[i++] = 'S';
if (acb_info & ACB_AUTOLOCK ) acct_str[i++] = 'L';
if (acb_info & ACB_PWNOEXP ) acct_str[i++] = 'X';
if (acb_info & ACB_DOMTRUST ) acct_str[i++] = 'I';
acct_str[i++] = ']';
acct_str[i++] = '\0';
return acct_str;
}
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