1 /* $NetBSD: kgetcred.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $ */
2
3 /*
4 * Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include "kuser_locl.h"
37
38 static char *cache_str;
39 static char *out_cache_str;
40 static char *delegation_cred_str;
41 static char *etype_str;
42 static int transit_flag = 1;
43 static int forwardable_flag;
44 static int canonicalize_flag;
45 static char *impersonate_str;
46 static char *nametype_str;
47 static int version_flag;
48 static int help_flag;
49
50 struct getargs args[] = {
51 { "cache", 'c', arg_string, &cache_str,
52 NP_("credential cache to use", ""), "cache"},
53 { "out-cache", 0, arg_string, &out_cache_str,
54 NP_("credential cache to store credential in", ""), "cache"},
55 { "delegation-credential-cache",0,arg_string, &delegation_cred_str,
56 NP_("where to find the ticket use for delegation", ""), "cache"},
57 { "canonicalize", 0, arg_flag, &canonicalize_flag,
58 NP_("canonicalize the principal", ""), NULL },
59 { "forwardable", 0, arg_flag, &forwardable_flag,
60 NP_("forwardable ticket requested", ""), NULL},
61 { "transit-check", 0, arg_negative_flag, &transit_flag, NULL, NULL },
62 { "enctype", 'e', arg_string, &etype_str,
63 NP_("encryption type to use", ""), "enctype"},
64 { "impersonate", 0, arg_string, &impersonate_str,
65 NP_("client to impersonate", ""), "principal"},
66 { "name-type", 0, arg_string, &nametype_str, NULL, NULL },
67 { "version", 0, arg_flag, &version_flag, NULL, NULL },
68 { "help", 0, arg_flag, &help_flag, NULL, NULL }
69 };
70
71 static void
usage(int ret)72 usage (int ret)
73 {
74 arg_printusage (args,
75 sizeof(args)/sizeof(*args),
76 NULL,
77 "service");
78 exit (ret);
79 }
80
81 int
main(int argc,char ** argv)82 main(int argc, char **argv)
83 {
84 krb5_error_code ret;
85 krb5_context context;
86 krb5_ccache cache;
87 krb5_creds *out;
88 int optidx = 0;
89 krb5_get_creds_opt opt;
90 krb5_principal server;
91 krb5_principal impersonate = NULL;
92
93 setprogname (argv[0]);
94
95 ret = krb5_init_context (&context);
96 if (ret)
97 errx(1, "krb5_init_context failed: %d", ret);
98
99 if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
100 usage(1);
101
102 if (help_flag)
103 usage (0);
104
105 if(version_flag) {
106 print_version(NULL);
107 exit(0);
108 }
109
110 argc -= optidx;
111 argv += optidx;
112
113 if (argc != 1)
114 usage (1);
115
116 if(cache_str) {
117 ret = krb5_cc_resolve(context, cache_str, &cache);
118 if (ret)
119 krb5_err (context, 1, ret, "%s", cache_str);
120 } else {
121 ret = krb5_cc_default (context, &cache);
122 if (ret)
123 krb5_err (context, 1, ret, "krb5_cc_resolve");
124 }
125
126 ret = krb5_get_creds_opt_alloc(context, &opt);
127 if (ret)
128 krb5_err (context, 1, ret, "krb5_get_creds_opt_alloc");
129
130 if (etype_str) {
131 krb5_enctype enctype;
132
133 ret = krb5_string_to_enctype(context, etype_str, &enctype);
134 if (ret)
135 krb5_errx (context, 1, N_("unrecognized enctype: %s", ""),
136 etype_str);
137 krb5_get_creds_opt_set_enctype(context, opt, enctype);
138 }
139
140 if (impersonate_str) {
141 ret = krb5_parse_name(context, impersonate_str, &impersonate);
142 if (ret)
143 krb5_err (context, 1, ret, "krb5_parse_name %s", impersonate_str);
144 krb5_get_creds_opt_set_impersonate(context, opt, impersonate);
145 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
146 }
147
148 if (out_cache_str)
149 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
150
151 if (forwardable_flag)
152 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
153 if (!transit_flag)
154 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_TRANSIT_CHECK);
155 if (canonicalize_flag)
156 krb5_get_creds_opt_add_options(context, opt, KRB5_GC_CANONICALIZE);
157
158 if (delegation_cred_str) {
159 krb5_ccache id;
160 krb5_creds c, mc;
161 Ticket ticket;
162
163 krb5_cc_clear_mcred(&mc);
164 ret = krb5_cc_get_principal(context, cache, &mc.server);
165 if (ret)
166 krb5_err (context, 1, ret, "krb5_cc_get_principal");
167
168 ret = krb5_cc_resolve(context, delegation_cred_str, &id);
169 if(ret)
170 krb5_err (context, 1, ret, "krb5_cc_resolve");
171
172 ret = krb5_cc_retrieve_cred(context, id, 0, &mc, &c);
173 if(ret)
174 krb5_err (context, 1, ret, "krb5_cc_retrieve_cred");
175
176 ret = decode_Ticket(c.ticket.data, c.ticket.length, &ticket, NULL);
177 if (ret) {
178 krb5_clear_error_message(context);
179 krb5_err (context, 1, ret, "decode_Ticket");
180 }
181 krb5_free_cred_contents(context, &c);
182
183 ret = krb5_get_creds_opt_set_ticket(context, opt, &ticket);
184 if(ret)
185 krb5_err (context, 1, ret, "krb5_get_creds_opt_set_ticket");
186 free_Ticket(&ticket);
187
188 krb5_cc_close (context, id);
189 krb5_free_principal(context, mc.server);
190
191 krb5_get_creds_opt_add_options(context, opt,
192 KRB5_GC_CONSTRAINED_DELEGATION);
193 }
194
195 ret = krb5_parse_name(context, argv[0], &server);
196 if (ret)
197 krb5_err (context, 1, ret, "krb5_parse_name %s", argv[0]);
198
199 if (nametype_str) {
200 int32_t nametype;
201
202 ret = krb5_parse_nametype(context, nametype_str, &nametype);
203 if (ret)
204 krb5_err(context, 1, ret, "krb5_parse_nametype");
205
206 server->name.name_type = (NAME_TYPE)nametype;
207 }
208
209 ret = krb5_get_creds(context, opt, cache, server, &out);
210 if (ret)
211 krb5_err (context, 1, ret, "krb5_get_creds");
212
213 if (out_cache_str) {
214 krb5_ccache id;
215
216 ret = krb5_cc_resolve(context, out_cache_str, &id);
217 if(ret)
218 krb5_err (context, 1, ret, "krb5_cc_resolve");
219
220 ret = krb5_cc_initialize(context, id, out->client);
221 if(ret)
222 krb5_err (context, 1, ret, "krb5_cc_initialize");
223
224 ret = krb5_cc_store_cred(context, id, out);
225 if(ret)
226 krb5_err (context, 1, ret, "krb5_cc_store_cred");
227 krb5_cc_close (context, id);
228 }
229
230 krb5_free_creds(context, out);
231 krb5_free_principal(context, server);
232 krb5_get_creds_opt_free(context, opt);
233 krb5_cc_close (context, cache);
234 krb5_free_context (context);
235
236 return 0;
237 }
238