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
|
/*
* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <mit-copyright.h>.
*
* Routine to initialize user to Kerberos. Prompts optionally for
* user, instance and realm. Authenticates user and gets a ticket
* for the Kerberos ticket-granting service for future use.
*
* Options are:
*
* -i[instance]
* -r[realm]
* -v[erbose]
* -l[ifetime]
* -p
*/
#include "kuser_locl.h"
RCSID("$Id$");
#define LIFE DEFAULT_TKT_LIFE /* lifetime of ticket in 5-minute units */
#define CHPASSLIFE 2
static void
get_input(char *s, int size, FILE *stream)
{
char *p;
if (fgets(s, size, stream) == NULL)
exit(1);
if ( (p = strchr(s, '\n')) != NULL)
*p = '\0';
}
static void
usage(void)
{
fprintf(stderr, "Usage: %s [-irvlp] [name]\n", __progname);
exit(1);
}
int
main(int argc, char **argv)
{
char aname[ANAME_SZ];
char inst[INST_SZ];
char realm[REALM_SZ];
char buf[MaxHostNameLen];
char name[MAX_K_NAME_SZ];
char *username = NULL;
int iflag, rflag, vflag, lflag, pflag, lifetime, k_errno;
int i;
set_progname (argv[0]);
*inst = *realm = '\0';
iflag = rflag = vflag = lflag = pflag = 0;
lifetime = LIFE;
set_progname(argv[0]);
while (--argc) {
if ((*++argv)[0] != '-') {
if (username)
usage();
username = *argv;
continue;
}
for (i = 1; (*argv)[i] != '\0'; i++)
switch ((*argv)[i]) {
case 'i': /* Instance */
++iflag;
continue;
case 'r': /* Realm */
++rflag;
continue;
case 'v': /* Verbose */
++vflag;
continue;
case 'l':
++lflag;
continue;
case 'p':
++pflag; /* chpass-tickets */
lifetime = CHPASSLIFE;
break;
default:
usage();
}
}
if (username &&
(k_errno = kname_parse(aname, inst, realm, username)) != KSUCCESS) {
warnx("%s", krb_get_err_text(k_errno));
iflag = rflag = 1;
username = NULL;
}
if (k_gethostname(buf, MaxHostNameLen))
err(1, "k_gethostname failed");
printf("%s (%s)\n", ORGANIZATION, buf);
if (username) {
printf("Kerberos Initialization for \"%s", aname);
if (*inst)
printf(".%s", inst);
if (*realm)
printf("@%s", realm);
printf("\"\n");
} else {
if (iflag) {
printf("Kerberos Initialization\n");
printf("Kerberos name: ");
get_input(name, sizeof(name), stdin);
if (!*name)
return 0;
if ((k_errno = kname_parse(aname, inst, realm, name))
!= KSUCCESS )
errx(1, "%s", krb_get_err_text(k_errno));
} else {
int uid = getuid();
char *getenv();
struct passwd *pwd;
/* default to current user name unless running as root */
if (uid == 0 && (username = getenv("USER")) &&
strcmp(username, "root") != 0) {
strncpy(aname, username, sizeof(aname));
strncpy(inst, "root", sizeof(inst));
} else {
pwd = getpwuid(uid);
if (pwd == (struct passwd *) NULL) {
fprintf(stderr, "Unknown name for your uid\n");
printf("Kerberos name: ");
get_input(aname, sizeof(aname), stdin);
} else
strncpy(aname, pwd->pw_name, sizeof(aname));
}
if (!*name)
return 0;
if (!k_isname(aname)) {
errx(1, "%s", "bad Kerberos name format");
}
}
}
/* optional instance */
if (iflag) {
printf("Kerberos instance: ");
get_input(inst, sizeof(inst), stdin);
if (!k_isinst(inst))
errx(1, "bad Kerberos instance format");
}
if (rflag) {
printf("Kerberos realm: ");
get_input(realm, sizeof(realm), stdin);
if (!k_isrealm(realm))
errx(1, "bad Kerberos realm format");
}
if (lflag) {
printf("Kerberos ticket lifetime (minutes): ");
get_input(buf, sizeof(buf), stdin);
lifetime = atoi(buf);
if (lifetime < 5)
lifetime = 1;
else
lifetime = krb_time_to_life(0, lifetime*60);
/* This should be changed if the maximum ticket lifetime */
/* changes */
if (lifetime > 255)
lifetime = 255;
}
if (!*realm && krb_get_lrealm(realm, 1))
errx(1, "krb_get_lrealm failed");
k_errno = krb_get_pw_in_tkt(aname, inst, realm,
pflag ? PWSERV_NAME :
KRB_TICKET_GRANTING_TICKET,
pflag ? KADM_SINST : realm,
lifetime, 0);
if (vflag) {
printf("Kerberos realm %s:\n", realm);
printf("Ticket file: %s\n", tkt_string());
printf("%s\n", krb_get_err_text(k_errno));
} else if (k_errno)
errx(1, "%s", krb_get_err_text(k_errno));
exit(0);
}
|
