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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
Unix SMB/Netbios implementation.
Version 1.9.
Password and authentication handling
Copyright (C) Andrew Tridgell 1992-1998
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;
/* this holds info on user ids that are already validated for this VC */
static user_struct *validated_users = NULL;
static int num_validated_users = 0;
/****************************************************************************
check if a uid has been validated, and return an pointer to the user_struct
if it has. NULL if not. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
user_struct *get_valid_user_struct(uint16 vuid)
{
if (vuid == UID_FIELD_INVALID)
return NULL;
vuid -= VUID_OFFSET;
if ((vuid >= (uint16)num_validated_users) ||
(validated_users[vuid].uid == (uid_t)-1) || (validated_users[vuid].gid == (gid_t)-1))
return NULL;
return &validated_users[vuid];
}
/****************************************************************************
invalidate a uid
****************************************************************************/
void invalidate_vuid(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
if (vuser == NULL) return;
vuser->uid = (uid_t)-1;
vuser->gid = (gid_t)-1;
/* same number of igroups as groups */
vuser->n_groups = 0;
if (vuser->groups)
free((char *)vuser->groups);
vuser->groups = NULL;
}
/****************************************************************************
return a validated username
****************************************************************************/
char *validated_username(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
if (vuser == NULL)
return 0;
return(vuser->name);
}
/****************************************************************************
register a uid/name pair as being valid and that a valid password
has been given. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
uint16 create_vuid(uid_t uid, gid_t gid, int n_groups, gid_t *groups,
char *unix_name, char *requested_name,
char *real_name,
BOOL guest, const NET_USER_INFO_3 *info3)
{
user_struct *vuser;
uint16 vuid;
validated_users = (user_struct *)Realloc(validated_users,
sizeof(user_struct)*
(num_validated_users+1));
if (!validated_users)
{
DEBUG(0,("Failed to realloc users struct!\n"));
num_validated_users = 0;
return UID_FIELD_INVALID;
}
vuser = &validated_users[num_validated_users];
num_validated_users++;
vuser->uid = uid;
vuser->gid = gid;
vuser->guest = guest;
fstrcpy(vuser->name,unix_name);
fstrcpy(vuser->requested_name,requested_name);
fstrcpy(vuser->real_name,real_name);
memcpy(&vuser->usr, info3, sizeof(vuser->usr));
vuser->n_groups = n_groups;
vuser->groups = groups;
vuid = (uint16)((num_validated_users - 1) + VUID_OFFSET);
DEBUG(3,("uid %d vuid %d registered to name %s\n",(int)uid, vuid, unix_name));
dump_data_pw("vuid usr sess key:\n", vuser->usr.user_sess_key,
sizeof(vuser->usr.user_sess_key));
return vuid;
}
/****************************************************************************
register a uid/name pair as being valid and that a valid password
has been given. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest, const NET_USER_INFO_3 *info3)
{
int n_groups = 0;
gid_t *groups = NULL;
fstring real_name;
struct passwd *pwfile; /* for getting real name from passwd file */
/* Ensure no vuid gets registered in share level security. */
if(lp_security() == SEC_SHARE)
return UID_FIELD_INVALID;
#if 0
/*
* After observing MS-Exchange services writing to a Samba share
* I belive this code is incorrect. Each service does its own
* sessionsetup_and_X for the same user, and as each service shuts
* down, it does a user_logoff_and_X. As we are consolidating multiple
* sessionsetup_and_X's onto the same vuid here, when the first service
* shuts down, it invalidates all the open files for the other services.
* Hence I am removing this code and forcing each sessionsetup_and_X
* to get a new vuid.
* Jeremy Allison. (jallison@whistle.com).
*/
int i;
for(i = 0; i < num_validated_users; i++) {
vuser = &validated_users[i];
if ( vuser->uid == uid )
return (uint16)(i + VUID_OFFSET); /* User already validated */
}
#endif
validated_users = (user_struct *)Realloc(validated_users,
sizeof(user_struct)*
(num_validated_users+1));
if (!validated_users)
{
DEBUG(0,("Failed to realloc users struct!\n"));
num_validated_users = 0;
return UID_FIELD_INVALID;
}
/* Find all the groups this uid is in and store them.
Used by become_user() */
get_unixgroups(unix_name,uid,gid,
&n_groups,
&groups);
DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
DEBUG(3, ("Clearing default real name\n"));
fstrcpy(real_name, "<Full Name>\0");
if (lp_unix_realname())
{
if ((pwfile=hashed_getpwnam(unix_name))!= NULL)
{
DEBUG(3, ("User name: %s\tReal name: %s\n",unix_name,pwfile->pw_gecos));
fstrcpy(real_name, pwfile->pw_gecos);
}
}
return create_vuid(uid, gid, n_groups, groups,
unix_name, requested_name,
real_name,
guest, info3);
}
/*******************************************************************
check if a username is OK
********************************************************************/
BOOL check_vuser_ok(struct uid_cache *cache, user_struct *vuser,int snum)
{
int i;
for (i=0;i<cache->entries;i++)
if (cache->list[i] == vuser->uid) return(True);
if (!user_ok(vuser->name,snum)) return(False);
i = cache->entries % UID_CACHE_SIZE;
cache->list[i] = vuser->uid;
if (cache->entries < UID_CACHE_SIZE)
cache->entries++;
return(True);
}
|
