| 1 | /*
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| 2 | * Copyright (c) 2008 Kungliga Tekniska Högskolan
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| 3 | * (Royal Institute of Technology, Stockholm, Sweden).
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | *
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * 3. Neither the name of KTH nor the names of its contributors may be
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| 18 | * used to endorse or promote products derived from this software without
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| 19 | * specific prior written permission.
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| 20 | *
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| 21 | * THIS SOFTWARE IS PROVIDED BY KTH AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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| 22 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KTH OR ITS CONTRIBUTORS BE
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| 25 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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| 28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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| 29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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| 30 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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| 31 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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| 32 |
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| 33 | #include "krb5_locl.h"
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| 34 | #include <err.h>
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| 35 | #include <getarg.h>
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| 36 |
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| 37 | static int version_flag = 0;
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| 38 | static int help_flag = 0;
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| 39 |
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| 40 | static struct getargs args[] = {
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| 41 | {"version", 0, arg_flag, &version_flag,
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| 42 | "print version", NULL },
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| 43 | {"help", 0, arg_flag, &help_flag,
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| 44 | NULL, NULL }
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| 45 | };
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| 46 |
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| 47 | static void
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| 48 | usage (int ret)
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| 49 | {
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| 50 | arg_printusage (args,
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| 51 | sizeof(args)/sizeof(*args),
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| 52 | NULL,
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| 53 | "hostname");
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| 54 | exit (ret);
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| 55 | }
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| 56 |
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| 57 | int
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| 58 | main(int argc, char **argv)
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| 59 | {
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| 60 | const char *hostname;
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| 61 | krb5_context context;
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| 62 | krb5_auth_context ac;
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| 63 | krb5_error_code ret;
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| 64 | krb5_creds cred;
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| 65 | krb5_ccache id;
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| 66 | krb5_data data;
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| 67 | int optidx = 0;
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| 68 |
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| 69 | setprogname (argv[0]);
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| 70 |
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| 71 | if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
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| 72 | usage(1);
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| 73 |
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| 74 | if (help_flag)
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| 75 | usage (0);
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| 76 |
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| 77 | if(version_flag){
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| 78 | print_version(NULL);
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| 79 | exit(0);
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| 80 | }
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| 81 |
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| 82 | argc -= optidx;
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| 83 | argv += optidx;
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| 84 |
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| 85 | if (argc < 1)
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| 86 | usage(1);
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| 87 |
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| 88 | hostname = argv[0];
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| 89 |
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| 90 | memset(&cred, 0, sizeof(cred));
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| 91 |
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| 92 | ret = krb5_init_context(&context);
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| 93 | if (ret)
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| 94 | errx (1, "krb5_init_context failed: %d", ret);
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| 95 |
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| 96 | ret = krb5_cc_default(context, &id);
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| 97 | if (ret)
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| 98 | krb5_err(context, 1, ret, "krb5_cc_default failed");
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| 99 |
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| 100 | ret = krb5_auth_con_init(context, &ac);
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| 101 | if (ret)
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| 102 | krb5_err(context, 1, ret, "krb5_auth_con_init failed");
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| 103 |
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| 104 | krb5_auth_con_addflags(context, ac,
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| 105 | KRB5_AUTH_CONTEXT_CLEAR_FORWARDED_CRED, NULL);
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| 106 |
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| 107 | ret = krb5_cc_get_principal(context, id, &cred.client);
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| 108 | if (ret)
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| 109 | krb5_err(context, 1, ret, "krb5_cc_get_principal");
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| 110 |
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| 111 | ret = krb5_make_principal(context,
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| 112 | &cred.server,
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| 113 | krb5_principal_get_realm(context, cred.client),
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| 114 | KRB5_TGS_NAME,
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| 115 | krb5_principal_get_realm(context, cred.client),
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| 116 | NULL);
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| 117 | if (ret)
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| 118 | krb5_err(context, 1, ret, "krb5_make_principal(server)");
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| 119 |
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| 120 | ret = krb5_get_forwarded_creds (context,
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| 121 | ac,
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| 122 | id,
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| 123 | KDC_OPT_FORWARDABLE,
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| 124 | hostname,
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| 125 | &cred,
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| 126 | &data);
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| 127 | if (ret)
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| 128 | krb5_err (context, 1, ret, "krb5_get_forwarded_creds");
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| 129 |
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| 130 | krb5_data_free(&data);
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| 131 | krb5_free_context(context);
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| 132 |
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| 133 | return 0;
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| 134 | }
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