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
|
/* $OpenBSD: krb_passwd.c,v 1.13 2000/02/25 22:09:14 hin Exp $ */
/* $KTH: kpasswd.c,v 1.25 1997/05/02 14:28:51 assar Exp $ */
/*
* This source code is no longer held under any constraint of USA
* `cryptographic laws' since it was exported legally. The cryptographic
* functions were removed from the code and a "Bones" distribution was
* made. A Commodity Jurisdiction Request #012-94 was filed with the
* USA State Department, who handed it to the Commerce department. The
* code was determined to fall under General License GTDA under ECCN 5D96G,
* and hence exportable. The cryptographic interfaces were re-added by Eric
* Young, and then KTH proceeded to maintain the code in the free world.
*
*/
/*
* 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.
*
*/
/*
* change your password with kerberos
*/
#ifdef KERBEROS
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <netinet/in.h>
#include <des.h>
#include <kerberosIV/krb.h>
#include <kerberosIV/kadm.h>
#include <kerberosIV/kadm_err.h>
#include <netdb.h>
#include <signal.h>
#include <pwd.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <com_err.h>
char realm[REALM_SZ];
extern void usage(int value);
int
krb_passwd(int argc, char **argv)
{
krb_principal principal;
krb_principal default_principal;
int realm_given = 0; /* True if realm was give on cmdline */
int use_default = 1; /* True if we should use default name */
int status; /* return code */
char pword[MAX_KPW_LEN];
int c;
char tktstring[MAXPATHLEN];
seteuid(getuid());
memset (&principal, 0, sizeof(principal));
memset (&default_principal, 0, sizeof(default_principal));
krb_get_default_principal (default_principal.name,
default_principal.instance,
default_principal.realm);
while ((c = getopt(argc, argv, "u:n:i:r:h")) != -1) {
switch (c) {
case 'u':
status = krb_parse_name (optarg, &principal);
if (status != KSUCCESS)
errx (2, "%s", krb_get_err_text(status));
if (principal.realm[0])
realm_given++;
else if (krb_get_lrealm(principal.realm, 1) != KSUCCESS)
errx (1, "Could not find default realm!");
break;
case 'n':
if (k_isname(optarg))
strncpy(principal.name, optarg, sizeof(principal.name) - 1);
else {
warnx("Bad name: %s", optarg);
usage(1);
}
break;
case 'i':
if (k_isinst(optarg))
strncpy(principal.instance,
optarg,
sizeof(principal.instance) - 1);
else {
warnx("Bad instance: %s", optarg);
usage(1);
}
break;
case 'r':
if (k_isrealm(optarg)) {
strncpy(principal.realm, optarg, sizeof(principal.realm) - 1);
realm_given++;
} else {
warnx("Bad realm: %s", optarg);
usage(1);
}
break;
case 'h':
usage(0);
break;
default:
usage(1);
break;
}
use_default = 0;
}
if (optind < argc) {
use_default = 0;
status = krb_parse_name (argv[optind], &principal);
if(status != KSUCCESS)
errx (1, "%s", krb_get_err_text (status));
}
if (use_default) {
strncpy(principal.name, default_principal.name, ANAME_SZ - 1);
principal.name[ANAME_SZ - 1] = '\0';
strncpy(principal.instance, default_principal.instance, INST_SZ - 1);
principal.instance[INST_SZ - 1] = '\0';
strncpy(principal.realm, default_principal.realm, REALM_SZ - 1);
principal.realm[REALM_SZ - 1] = '\0';
} else {
if (!principal.name[0]) {
strncpy(principal.name, default_principal.name, ANAME_SZ - 1);
principal.name[ANAME_SZ - 1] = '\0';
}
if (!principal.realm[0]) {
strncpy(principal.realm, default_principal.realm, REALM_SZ - 1);
principal.realm[REALM_SZ - 1] = '\0';
}
}
snprintf(tktstring, sizeof(tktstring),
"%s_cpw_%u", TKT_ROOT, (unsigned)getpid());
krb_set_tkt_string(tktstring);
if (get_pw_new_pwd(pword, sizeof(pword), &principal,
realm_given)) {
dest_tkt ();
exit(1);
}
status = kadm_init_link (PWSERV_NAME, KRB_MASTER, principal.realm);
if (status != KADM_SUCCESS)
com_err(argv[0], status, "while initializing");
else {
des_cblock newkey;
char *pw_msg; /* message from server */
des_string_to_key(pword, &newkey);
status = kadm_change_pw_plain((unsigned char*)&newkey, pword, &pw_msg);
memset(newkey, 0, sizeof(newkey));
if (status == KADM_INSECURE_PW)
warnx ("Insecure password: %s", pw_msg);
else if (status != KADM_SUCCESS)
com_err(argv[0], status, " attempting to change password.");
}
memset(pword, 0, sizeof(pword));
if (status != KADM_SUCCESS)
fprintf(stderr,"Password NOT changed.\n");
else
printf("Password changed.\n");
dest_tkt();
if (status)
return 2;
else
return 0;
}
#endif /* KERBEROS */
|
