1/*
2 * Copyright (c) 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of KTH nor the names of its contributors may be
18 *    used to endorse or promote products derived from this software without
19 *    specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
22 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
32
33#include "krb5_locl.h"
34#include <getarg.h>
35#include <err.h>
36
37static int version_flag = 0;
38static int help_flag	= 0;
39
40static struct getargs args[] = {
41    {"version",	0,	arg_flag,	&version_flag,
42     "print version", NULL },
43    {"help",	0,	arg_flag,	&help_flag,
44     NULL, NULL }
45};
46
47static void
48usage (int ret)
49{
50    arg_printusage (args,
51		    sizeof(args)/sizeof(*args),
52		    NULL,
53		    "principal luser");
54    exit (ret);
55}
56
57int
58main(int argc, char **argv)
59{
60    krb5_context context;
61    krb5_error_code ret;
62    krb5_principal principal;
63    char *p;
64    int o = 0;
65
66    setprogname(argv[0]);
67
68    if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &o))
69	usage(1);
70
71    if (help_flag)
72	usage (0);
73
74    if(version_flag){
75	print_version(NULL);
76	exit(0);
77    }
78
79    argc -= o;
80    argv += o;
81
82    ret = krb5_init_context(&context);
83    if (ret)
84	errx (1, "krb5_init_context failed: %d", ret);
85
86    if (argc != 2)
87	usage(1);
88
89    ret = krb5_parse_name(context, argv[0], &principal);
90    if (ret)
91	krb5_err(context, 1, ret, "krb5_parse_name");
92
93    ret = krb5_unparse_name(context, principal, &p);
94    if (ret)
95	krb5_err(context, 1, ret, "krb5_unparse_name");
96
97    ret = krb5_kuserok(context, principal, argv[1]);
98
99    krb5_free_context(context);
100
101    printf("%s is %sallowed to login as %s\n", p, ret ? "" : "NOT ", argv[1]);
102
103    return 0;
104}
105