summaryrefslogtreecommitdiff
path: root/source3/smbd/auth_util.c
blob: 1967c32b9a16d694f15404a3377ce11e8fc77be9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   Authentication utility functions
   Copyright (C) Andrew Tridgell 1992-1998
   Copyright (C) Andrew Bartlett 2001

   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.
*/
#include "includes.h"

extern int DEBUGLEVEL;

/* Data to do lanman1/2 password challenge. */
static unsigned char saved_challenge[8];
static BOOL challenge_sent=False;

/*******************************************************************
Get the next challenge value - no repeats.
********************************************************************/
void generate_next_challenge(char *challenge)
{
        unsigned char buf[8];

        generate_random_buffer(buf,8,False);
	memcpy(saved_challenge, buf, 8);
	memcpy(challenge,buf,8);
	challenge_sent = True;
}

/*******************************************************************
set the last challenge sent, usually from a password server
********************************************************************/
BOOL set_challenge(unsigned char *challenge)
{
	memcpy(saved_challenge,challenge,8);
	challenge_sent = True;
	return(True);
}

/*******************************************************************
get the last challenge sent
********************************************************************/
BOOL last_challenge(unsigned char *challenge)
{
	if (!challenge_sent) return(False);
	memcpy(challenge,saved_challenge,8);
	return(True);
}


/****************************************************************************
 Create a UNIX user on demand.
****************************************************************************/

static int smb_create_user(char *unix_user, char *homedir)
{
	pstring add_script;
	int ret;

	pstrcpy(add_script, lp_adduser_script());
	if (! *add_script) return -1;
	all_string_sub(add_script, "%u", unix_user, sizeof(pstring));
	if (homedir)
		all_string_sub(add_script, "%H", homedir, sizeof(pstring));
	ret = smbrun(add_script,NULL);
	DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
	return ret;
}

/****************************************************************************
 Delete a UNIX user on demand.
****************************************************************************/

static int smb_delete_user(char *unix_user)
{
	pstring del_script;
	int ret;

	pstrcpy(del_script, lp_deluser_script());
	if (! *del_script) return -1;
	all_string_sub(del_script, "%u", unix_user, sizeof(pstring));
	ret = smbrun(del_script,NULL);
	DEBUG(3,("smb_delete_user: Running the command `%s' gave %d\n",del_script,ret));
	return ret;
}

/****************************************************************************
 Add and Delete UNIX users on demand, based on NTSTATUS codes.
****************************************************************************/

void smb_user_control(char *unix_user, NTSTATUS nt_status) 
{
	struct passwd *pwd=NULL;

	if (NT_STATUS_IS_OK(nt_status)) {
		/*
		 * User validated ok against Domain controller.
		 * If the admin wants us to try and create a UNIX
		 * user on the fly, do so.
		 */
		if(lp_adduser_script() && !(pwd = smb_getpwnam(unix_user,True)))
			smb_create_user(unix_user, NULL);

		if(lp_adduser_script() && pwd) {
			SMB_STRUCT_STAT st;

			/*
			 * Also call smb_create_user if the users home directory
			 * doesn't exist. Used with winbindd to allow the script to
			 * create the home directory for a user mapped with winbindd.
			 */

			if (pwd->pw_dir && (sys_stat(pwd->pw_dir, &st) == -1) && (errno == ENOENT))
				smb_create_user(unix_user, pwd->pw_dir);
		}

	} else if (NT_STATUS_V(nt_status) == NT_STATUS_V(NT_STATUS_NO_SUCH_USER)) {
		/*
		 * User failed to validate ok against Domain controller.
		 * If the failure was "user doesn't exist" and admin 
		 * wants us to try and delete that UNIX user on the fly,
		 * do so.
		 */
		if(lp_deluser_script() && smb_getpwnam(unix_user,True))
			smb_delete_user(unix_user);
	}
}