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
|
/*********************************************************************\
* Copyright (c) 2003 by Radim Kolar (hsn@cybermail.net) *
* *
* You may copy or modify this file in any manner you wish, provided *
* that this notice is always included, and that you hold the author *
* harmless for any loss or damage resulting from the installation or *
* use of this software. *
\*********************************************************************/
#include "tweak.h"
#include <stdio.h>
#include "server_def.h"
#include "s_extern.h"
#include "my-string.h"
/* loads a password from file in current directory */
static char *load_password (const char * file)
{
/* load password */
FILE *f;
char fsp_passwd[80];
f=fopen(file,"r");
if(f) {
if(fscanf(f, "%79s", fsp_passwd) != 1) {
if(dbug) printf("load_pass: no password found in file\n");
fclose(f);
return NULL;
}
} else
return NULL;
fclose(f);
return strdup(fsp_passwd);
}
/* save a password to file in current directory */
static void save_password (const char *file,const char *password)
{
/* load password */
FILE *f;
f=fopen(file,"w");
if(f) {
fprintf(f,"%s\n",password);
fclose(f);
}
}
/* save access rights to filesystem */
void save_access_rights (DIRINFO *di)
{
/* step 1 - unlink everything */
unlink(FSP_NOGET);
unlink(FSP_DEL);
unlink(FSP_ADD);
unlink(FSP_MKDIR);
unlink(FSP_RENAME);
unlink(FSP_NOLIST);
unlink(FSP_PASSWORD);
unlink(FSP_OWNER);
unlink(FSP_OWNERPASSWORD);
unlink(FSP_DIRLISTING);
if(!use_access_files) return;
/* step2 save flagfiles */
if(! (di->protection & DIR_GET) ) touch(FSP_NOGET);
if(di->protection & DIR_DEL) touch(FSP_DEL);
if(di->protection & DIR_ADD) touch(FSP_ADD);
if(di->protection & DIR_MKDIR) touch(FSP_MKDIR);
if(di->protection & DIR_RENAME) touch(FSP_RENAME);
if(! (di->protection& DIR_LIST)) touch(FSP_NOLIST);
/* step3 pazzwordz */
if(di->public_password) save_password(FSP_PASSWORD,di->public_password);
if(di->owner_password) save_password(FSP_OWNERPASSWORD,di->owner_password);
/* save Owner ACL */
if(di->owner)
{
FILE *f;
f=fopen(FSP_OWNER,"w");
if(f)
{
dump_iptab(di->owner,f);
fclose(f);
}
}
}
/* called with current directory == tested directory */
/* load access rights for validated directory */
void load_access_rights (DIRINFO *di)
{
struct stat sf;
FILE *f;
char owner_line[256];
di->owner=NULL;
di->owner_password=NULL;
di->public_password=NULL;
di->protection=DIR_LIST|DIR_GET;
di->readme=NULL;
/* load directory readme file */
if(!FSP_STAT(readme_file,&sf))
{
f=fopen(readme_file,"r");
if(f)
{
unsigned int s;
/* max readme file size is
* packetsize - pro_bytes (now 1) - 1 (for /0)
*/
s=min(packetsize-PRO_BYTES-1,sf.st_size);
di->readme=calloc(1,s+1); /* allocate also space for ending /0 */
if(di->readme)
{
fread(di->readme,s,1,f);
di->protection|=DIR_README;
}
fclose(f);
}
}
if(!use_access_files) return;
/* LOAD ACCESS RIGHTS FROM FILES IN CURRENT DIRECTORY */
if(fexist(FSP_NOGET)) di->protection^=DIR_GET;
if(fexist(FSP_DEL)) di->protection|=DIR_DEL;
if(fexist(FSP_ADD)) di->protection|=DIR_ADD;
if(fexist(FSP_MKDIR)) di->protection|=DIR_MKDIR;
if(fexist(FSP_RENAME)) di->protection|=DIR_RENAME;
if(fexist(FSP_NOLIST)) di->protection^=DIR_LIST;
if(!FSP_STAT(FSP_PASSWORD,&sf))
if(sf.st_size>0)
di->public_password=load_password(FSP_PASSWORD);
/* load owner info */
f=fopen(FSP_OWNER,"r");
if(!f)
return;
while(fscanf(f, "%255[^\n\r]", owner_line) == 1)
{
add_ipline(owner_line,&di->owner);
}
fclose(f);
/* .. and password */
if(!FSP_STAT(FSP_OWNERPASSWORD,&sf))
{
if(sf.st_size>0)
di->owner_password=load_password(FSP_OWNERPASSWORD);
}
}
/* does caller has enough security rights? */
/* if rights has DIR_PRIV set than caller is restristed and need also
* at least 'N' record to get it, if he has DIR_README, we will send him
* a datagram with error reply */
const char * require_access_rights (const DIRINFO *di,unsigned char rights,unsigned long ip_addr, const char * passwd)
{
const char *acc=NULL;
/* check if we has record in an owner tabl. */
if(di->owner)
{
/* check ip access */
acc=check_ip_table(ip_addr,di->owner);
}
if(acc!=NULL)
{
if(acc[0]=='I' || acc[0]=='D')
/* bazmeg IP! */
return acc;
if(acc[0]=='O') /* possible owner */
{
if(di->owner_password==NULL)
{
if(permit_passwordless_owners)
return acc; /* passwordless owner */
} else
{
/* do we have a password? */
if(passwd)
{
/* compare passwords */
if(!strcmp(passwd,di->owner_password))
return acc; /* owner with good password */
} else
if(rights & DIR_OWNER)
return "DPassword required for owner";
}
}
}
if(rights & DIR_OWNER)
return "DNot an owner";
/* is password needed for public access? */
if(di->public_password)
{
if(passwd==NULL)
return "DYou need a password";
else
if(strcmp(di->public_password,passwd))
return "DInvalid password";
}
/* now check public access rights */
if( (rights & di->protection) ||
(rights==0)
)
return "NWelcome on board captain!";
else
return "DPermission denied";
}
|
