1 /*
2 * Copyright (c) 2008 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 <err.h>
35 #include <getarg.h>
36
37 static int version_flag = 0;
38 static int help_flag = 0;
39
40 static 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
47 static void
usage(int ret)48 usage (int ret)
49 {
50 arg_printusage (args,
51 sizeof(args)/sizeof(*args),
52 NULL,
53 "hostname");
54 exit (ret);
55 }
56
57 int
main(int argc,char ** argv)58 main(int argc, char **argv)
59 {
60 const char *hostname;
61 krb5_context context;
62 krb5_auth_context ac;
63 krb5_error_code ret;
64 krb5_creds cred;
65 krb5_ccache id;
66 krb5_data data;
67 int optidx = 0;
68
69 setprogname (argv[0]);
70
71 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
72 usage(1);
73
74 if (help_flag)
75 usage (0);
76
77 if(version_flag){
78 print_version(NULL);
79 exit(0);
80 }
81
82 argc -= optidx;
83 argv += optidx;
84
85 if (argc < 1)
86 usage(1);
87
88 hostname = argv[0];
89
90 memset(&cred, 0, sizeof(cred));
91
92 ret = krb5_init_context(&context);
93 if (ret)
94 errx (1, "krb5_init_context failed: %d", ret);
95
96 ret = krb5_cc_default(context, &id);
97 if (ret)
98 krb5_err(context, 1, ret, "krb5_cc_default failed");
99
100 ret = krb5_auth_con_init(context, &ac);
101 if (ret)
102 krb5_err(context, 1, ret, "krb5_auth_con_init failed");
103
104 krb5_auth_con_addflags(context, ac,
105 KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED, NULL);
106
107 ret = krb5_cc_get_principal(context, id, &cred.client);
108 if (ret)
109 krb5_err(context, 1, ret, "krb5_cc_get_principal");
110
111 ret = krb5_make_principal(context,
112 &cred.server,
113 krb5_principal_get_realm(context, cred.client),
114 KRB5_TGS_NAME,
115 krb5_principal_get_realm(context, cred.client),
116 NULL);
117 if (ret)
118 krb5_err(context, 1, ret, "krb5_make_principal(server)");
119
120 ret = krb5_get_forwarded_creds (context,
121 ac,
122 id,
123 KDC_OPT_FORWARDABLE,
124 hostname,
125 &cred,
126 &data);
127 if (ret)
128 krb5_err (context, 1, ret, "krb5_get_forwarded_creds");
129
130 krb5_data_free(&data);
131 krb5_free_context(context);
132
133 return 0;
134 }
135