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
|
/*
* Copyright (c) 1997 - 1999 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5_locl.h"
RCSID("$Id: kuserok.c,v 1.7 2003/03/13 19:53:43 lha Exp $");
/*
* Return TRUE iff `principal' is allowed to login as `luser'.
*/
krb5_boolean
krb5_kuserok (krb5_context context,
krb5_principal principal,
const char *luser)
{
char buf[BUFSIZ];
struct passwd *pwd;
FILE *f;
krb5_realm *realms, *r;
krb5_error_code ret;
krb5_boolean b;
pwd = getpwnam (luser); /* XXX - Should use k_getpwnam? */
if (pwd == NULL)
return FALSE;
ret = krb5_get_default_realms (context, &realms);
if (ret)
return FALSE;
for (r = realms; *r != NULL; ++r) {
krb5_principal local_principal;
ret = krb5_build_principal (context,
&local_principal,
strlen(*r),
*r,
luser,
NULL);
if (ret) {
krb5_free_host_realm (context, realms);
return FALSE;
}
b = krb5_principal_compare (context, principal, local_principal);
krb5_free_principal (context, local_principal);
if (b) {
krb5_free_host_realm (context, realms);
return TRUE;
}
}
krb5_free_host_realm (context, realms);
snprintf (buf, sizeof(buf), "%s/.k5login", pwd->pw_dir);
f = fopen (buf, "r");
if (f == NULL)
return FALSE;
while (fgets (buf, sizeof(buf), f) != NULL) {
krb5_principal tmp;
buf[strcspn(buf, "\n")] = '\0';
ret = krb5_parse_name (context, buf, &tmp);
if (ret) {
fclose (f);
return FALSE;
}
b = krb5_principal_compare (context, principal, tmp);
krb5_free_principal (context, tmp);
if (b) {
fclose (f);
return TRUE;
}
}
fclose (f);
return FALSE;
}
|
