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
|
/* $OpenBSD: kntoln.c,v 1.5 1997/12/22 15:02:08 art Exp $ */
/* $KTH: kntoln.c,v 1.7 1997/03/23 03:53:12 joda Exp $ */
/*
* This software may now be redistributed outside the US.
*
*/
/*
* Copyright (C) 1989 by the Massachusetts Institute of Technology
*
* Export of this software from the United States of America is assumed
* to require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*/
/*
* krb_kntoln converts an auth name into a local name by looking up
* the auth name in the /etc/aname file. The format of the aname
* file is:
*
* +-----+-----+-----+-----+------+----------+-------+-------+
* | anl | inl | rll | lnl | name | instance | realm | lname |
* +-----+-----+-----+-----+------+----------+-------+-------+
* | 1by | 1by | 1by | 1by | name | instance | realm | lname |
* +-----+-----+-----+-----+------+----------+-------+-------+
*
* If the /etc/aname file can not be opened it will set the
* local name to the auth name. Thus, in this case it performs as
* the identity function.
*
* The name instance and realm are passed to krb_kntoln through
* the AUTH_DAT structure (ad).
*
* Now here's what it *really* does:
*
* Given a Kerberos name in an AUTH_DAT structure, check that the
* instance is null, and that the realm is the same as the local
* realm, and return the principal's name in "lname". Return
* KSUCCESS if all goes well, otherwise KFAILURE.
*/
#include "krb_locl.h"
int
krb_kntoln(AUTH_DAT *ad, char *lname)
{
static char lrealm[REALM_SZ] = "";
if (ad == NULL || lname == NULL)
return KFAILURE;
if (!(*lrealm) && (krb_get_lrealm(lrealm,1) == KFAILURE))
return(KFAILURE);
if (strcmp(ad->pinst, ""))
return(KFAILURE);
if (strcmp(ad->prealm, lrealm))
return(KFAILURE);
strncpy(lname, ad->pname, ANAME_SZ);
lname[ANAME_SZ-1] = '\0';
return(KSUCCESS);
}
#if 0
/* Posted to usenet by "Derrick J. Brashear" <shadow+@andrew.cmu.edu> */
#include <krb.h>
#include <ndbm.h>
#include <stdio.h>
#include <sys/file.h>
#include <strings.h>
#include <sys/syslog.h>
#include <sys/errno.h>
extern int errno;
/*
* antoln converts an authentication name into a local name by looking up
* the authentication name in the /etc/aname dbm database.
*
* If the /etc/aname file can not be opened it will set the
* local name to the principal name. Thus, in this case it performs as
* the identity function.
*
* The name instance and realm are passed to antoln through
* the AUTH_DAT structure (ad).
*/
static char lrealm[REALM_SZ] = "";
int
an_to_ln(AUTH_DAT *ad,
char *lname)
{
static DBM *aname = NULL;
char keyname[ANAME_SZ+INST_SZ+REALM_SZ+2];
if(!(*lrealm) && (krb_get_lrealm(lrealm,1) == KFAILURE))
return(KFAILURE);
if((strcmp(ad->pinst,"") && strcmp(ad->pinst,"root")) ||
strcmp(ad->prealm,lrealm)) {
datum val;
datum key;
/*
* Non-local name (or) non-null and non-root instance.
* Look up in dbm file.
*/
if (!aname) {
if ((aname = dbm_open("/etc/aname", O_RDONLY, 0))
== NULL) return (KFAILURE);
}
/* Construct dbm lookup key. */
an_to_a(ad, keyname);
key.dptr = keyname;
key.dsize = strlen(keyname)+1;
flock(dbm_dirfno(aname), LOCK_SH);
val = dbm_fetch(aname, key);
flock(dbm_dirfno(aname), LOCK_UN);
if (!val.dptr) {
dbm_close(aname);
return(KFAILURE);
}
/* Got it! */
strncpy(lname, val.dptr, ANAME_SZ);
lname[ANAME_SZ-1] = '\0';
return(KSUCCESS);
} else{
strncpy(lname, ad->pname, ANAME_SZ);
lname[ANAME_SZ-1] = '\0';
}
return(KSUCCESS);
}
int
an_to_a(AUTH_DAT *ad,
char *str)
{
strncpy(str, ad->pname, ANAME_SZ);
str[ANAME_SZ-1] = '\0';
if(*ad->pinst) {
strcat(str, ".");
strcat(str, ad->pinst);
}
strcat(str, "@");
strcat(str, ad->prealm);
}
/*
* Parse a string of the form "user[.instance][@realm]"
* into a struct AUTH_DAT.
*/
int
a_to_an(char *str, AUTH_DAT *ad)
{
char *buf = (char *)malloc(strlen(str)+1);
char *rlm, *inst, *princ;
if (buf == NULL)
return KFAILURE;
if(!(*lrealm) && (krb_get_lrealm(lrealm,1) == KFAILURE)) {
free(buf);
buf = NULL;
return(KFAILURE);
}
/* destructive string hacking is more fun.. */
strncpy(buf, str, strlen(str)+1);
buf[strlen(str)] = '\0';
if (rlm = index(buf, '@')) {
*rlm++ = '\0';
}
if (inst = index(buf, '.')) {
*inst++ = '\0';
}
strcpy(ad->pname, buf);
if(inst) strcpy(ad->pinst, inst);
else *ad->pinst = '\0';
if (rlm) strcpy(ad->prealm, rlm);
else strcpy(ad->prealm, lrealm);
free(buf);
buf = NULL;
return(KSUCCESS);
}
#endif
|
