372 lines
12 KiB
C
372 lines
12 KiB
C
/*
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* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kuser_locl.h"
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static char *cache_str;
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static char *out_cache_str;
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static char *delegation_cred_str;
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static char *etype_str;
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static int transit_flag = 1;
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static int forwardable_flag;
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static int canonicalize_flag;
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static int is_hostbased_flag;
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static int is_canonical_flag;
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static char *impersonate_str;
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static char *nametype_str;
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static int store_flag = 1;
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static int cached_only_flag;
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static int anonymous_flag;
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static int debug_flag;
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static int version_flag;
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static int help_flag;
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struct getargs args[] = {
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{ "cache", 'c', arg_string, &cache_str,
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NP_("credential cache to use", ""), "cache"},
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{ "out-cache", 0, arg_string, &out_cache_str,
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NP_("credential cache to store credential in", ""), "cache"},
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{ "delegation-credential-cache",0,arg_string, &delegation_cred_str,
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NP_("where to find the ticket use for delegation", ""), "cache"},
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{ "canonicalize", 0, arg_flag, &canonicalize_flag,
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NP_("canonicalize the principal (chase referrals)", ""), NULL },
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{ "canonical", 0, arg_flag, &is_canonical_flag,
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NP_("the name components are canonical", ""), NULL },
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{ "forwardable", 0, arg_flag, &forwardable_flag,
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NP_("forwardable ticket requested", ""), NULL},
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{ "transit-check", 0, arg_negative_flag, &transit_flag, NULL, NULL },
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{ "enctype", 'e', arg_string, &etype_str,
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NP_("encryption type to use", ""), "enctype"},
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{ "impersonate", 0, arg_string, &impersonate_str,
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NP_("client to impersonate", ""), "principal"},
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{ "name-type", 0, arg_string, &nametype_str,
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NP_("Kerberos name type", ""), NULL },
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{ "hostbased", 'H', arg_flag, &is_hostbased_flag,
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NP_("indicate that the name is a host-based service name", ""), NULL },
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{ "store", 0, arg_negative_flag, &store_flag,
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NP_("don't store the tickets obtained in the cache", ""), NULL },
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{ "cached-only", 0, arg_flag, &cached_only_flag,
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NP_("don't talk to the KDC, just search the cache", ""), NULL },
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{ "anonymous", 'n', arg_flag, &anonymous_flag,
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NP_("request an anonymous ticket", ""), NULL },
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{ "debug", 0, arg_flag, &debug_flag, NULL, NULL },
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{ "version", 0, arg_flag, &version_flag, NULL, NULL },
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{ "help", 0, arg_flag, &help_flag, NULL, NULL }
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};
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static void
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usage(int ret)
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{
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arg_printusage(args,
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sizeof(args)/sizeof(*args),
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NULL,
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"service");
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exit (ret);
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}
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int
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main(int argc, char **argv)
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{
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krb5_error_code ret;
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krb5_context context;
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krb5_ccache cache;
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krb5_creds *out;
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int optidx = 0;
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int32_t nametype = KRB5_NT_UNKNOWN;
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krb5_get_creds_opt opt;
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krb5_principal server = NULL;
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krb5_principal impersonate;
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setprogname(argv[0]);
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ret = krb5_init_context(&context);
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if (ret)
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errx(1, "krb5_init_context failed: %d", ret);
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if (getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx))
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usage(1);
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if (help_flag)
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usage (0);
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if (version_flag) {
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print_version(NULL);
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exit(0);
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}
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argc -= optidx;
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argv += optidx;
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if (debug_flag) {
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ret = krb5_set_debug_dest(context, getprogname(), "STDERR");
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if (ret)
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krb5_warn(context, ret, "krb5_set_debug_dest");
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}
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if (cache_str) {
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ret = krb5_cc_resolve(context, cache_str, &cache);
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if (ret)
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krb5_err(context, 1, ret, "%s", cache_str);
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} else {
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ret = krb5_cc_default (context, &cache);
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if (ret)
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krb5_err(context, 1, ret, "krb5_cc_resolve");
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}
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ret = krb5_get_creds_opt_alloc(context, &opt);
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if (ret)
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krb5_err(context, 1, ret, "krb5_get_creds_opt_alloc");
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if (etype_str) {
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krb5_enctype enctype;
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ret = krb5_string_to_enctype(context, etype_str, &enctype);
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if (ret)
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krb5_errx(context, 1, N_("unrecognized enctype: %s", ""),
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etype_str);
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krb5_get_creds_opt_set_enctype(context, opt, enctype);
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}
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if (impersonate_str) {
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ret = krb5_parse_name(context, impersonate_str, &impersonate);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_name %s", impersonate_str);
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krb5_get_creds_opt_set_impersonate(context, opt, impersonate);
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
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krb5_free_principal(context, impersonate);
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}
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if (out_cache_str)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
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if (forwardable_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_FORWARDABLE);
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if (!transit_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_TRANSIT_CHECK);
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if (canonicalize_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_CANONICALIZE);
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if (!store_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_NO_STORE);
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if (cached_only_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_CACHED);
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if (anonymous_flag)
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krb5_get_creds_opt_add_options(context, opt, KRB5_GC_ANONYMOUS);
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if (delegation_cred_str) {
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krb5_ccache id;
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krb5_creds c, mc;
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Ticket ticket;
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krb5_cc_clear_mcred(&mc);
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ret = krb5_cc_get_principal(context, cache, &mc.server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_cc_get_principal");
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ret = krb5_cc_resolve(context, delegation_cred_str, &id);
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if(ret)
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krb5_err(context, 1, ret, "krb5_cc_resolve");
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ret = krb5_cc_retrieve_cred(context, id, 0, &mc, &c);
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if(ret)
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krb5_err(context, 1, ret, "krb5_cc_retrieve_cred");
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ret = decode_Ticket(c.ticket.data, c.ticket.length, &ticket, NULL);
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if (ret) {
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krb5_clear_error_message(context);
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krb5_err(context, 1, ret, "decode_Ticket");
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}
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krb5_free_cred_contents(context, &c);
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ret = krb5_get_creds_opt_set_ticket(context, opt, &ticket);
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if(ret)
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krb5_err(context, 1, ret, "krb5_get_creds_opt_set_ticket");
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free_Ticket(&ticket);
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krb5_cc_close(context, id);
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krb5_free_principal(context, mc.server);
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krb5_get_creds_opt_add_options(context, opt,
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KRB5_GC_CONSTRAINED_DELEGATION);
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}
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if (nametype_str != NULL) {
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ret = krb5_parse_nametype(context, nametype_str, &nametype);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_nametype");
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}
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if (nametype == KRB5_NT_SRV_HST ||
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nametype == KRB5_NT_SRV_HST_NEEDS_CANON)
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is_hostbased_flag = 1;
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if (is_hostbased_flag) {
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const char *sname = NULL;
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const char *hname = NULL;
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if (nametype_str != NULL &&
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nametype != KRB5_NT_SRV_HST &&
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nametype != KRB5_NT_SRV_HST_NEEDS_CANON)
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krb5_errx(context, 1, "--hostbased not compatible with "
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"non-hostbased --name-type");
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if (is_canonical_flag)
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nametype = KRB5_NT_SRV_HST;
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else
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nametype = KRB5_NT_SRV_HST_NEEDS_CANON;
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/*
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* Host-based service names can have more than one component.
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*
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* RFC5179 did not, but should have, assign a Kerberos name-type
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* corresponding to GSS_C_NT_DOMAINBASED. But it's basically a
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* host-based service name type with one additional component.
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*
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* So that's how we're treating host-based service names here:
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* two or more components.
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*/
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if (argc == 0) {
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usage(1);
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} else if (argc == 1) {
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krb5_principal server2;
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/*
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* In this case the one argument is a principal name, not the
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* service name.
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*
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* We parse the argument as a principal name, extract the service
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* and hostname components, use krb5_sname_to_principal(), then
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* extract the service and hostname components from that.
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*/
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ret = krb5_parse_name(context, argv[0], &server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_name %s", argv[0]);
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sname = krb5_principal_get_comp_string(context, server, 0);
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/*
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* If a single-component principal name is given, then we'll
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* default the hostname, as krb5_principal_get_comp_string()
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* returns NULL in this case.
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*/
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hname = krb5_principal_get_comp_string(context, server, 1);
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ret = krb5_sname_to_principal(context, hname, sname,
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KRB5_NT_SRV_HST, &server2);
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if (ret)
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krb5_err(context, 1, ret, "krb5_sname_to_principal %s %s",
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sname, hname);
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sname = krb5_principal_get_comp_string(context, server2, 0);
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hname = krb5_principal_get_comp_string(context, server2, 1);
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/*
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* Modify the original with the new sname/hname. This way we
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* retain any additional principal name components from the given
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* principal name.
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*
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* The name-type is set further below.
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*/
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ret = krb5_principal_set_comp_string(context, server, 0, sname);
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if (ret)
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krb5_err(context, 1, ret, "krb5_principal_set_comp_string %s", argv[0]);
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ret = krb5_principal_set_comp_string(context, server, 1, hname);
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if (ret)
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krb5_err(context, 1, ret, "krb5_principal_set_comp_string %s", argv[0]);
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krb5_free_principal(context, server2);
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} else {
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size_t i;
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/*
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* In this case the arguments are principal name components.
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*
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* The service and hostname components can be defaulted by passing
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* empty strings.
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*/
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sname = argv[0];
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if (*sname == '\0')
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sname = NULL;
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hname = argv[1];
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if (hname == NULL || *hname == '\0')
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hname = NULL;
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ret = krb5_sname_to_principal(context, hname, sname,
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KRB5_NT_SRV_HST, &server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_sname_to_principal");
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for (i = 2; i < argc; i++) {
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ret = krb5_principal_set_comp_string(context, server, i, argv[i]);
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if (ret)
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krb5_err(context, 1, ret, "krb5_principal_set_comp_string");
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}
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}
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} else if (argc == 1) {
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ret = krb5_parse_name(context, argv[0], &server);
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if (ret)
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krb5_err(context, 1, ret, "krb5_parse_name %s", argv[0]);
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} else {
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usage(1);
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}
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if (nametype != KRB5_NT_UNKNOWN)
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server->name.name_type = (NAME_TYPE)nametype;
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ret = krb5_get_creds(context, opt, cache, server, &out);
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if (ret)
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krb5_err(context, 1, ret, "krb5_get_creds");
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if (out_cache_str) {
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krb5_ccache id;
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ret = krb5_cc_resolve(context, out_cache_str, &id);
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if(ret)
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krb5_err(context, 1, ret, "krb5_cc_resolve");
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ret = krb5_cc_initialize(context, id, out->client);
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if(ret)
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krb5_err(context, 1, ret, "krb5_cc_initialize");
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ret = krb5_cc_store_cred(context, id, out);
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if(ret)
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krb5_err(context, 1, ret, "krb5_cc_store_cred");
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krb5_cc_close(context, id);
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}
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krb5_free_creds(context, out);
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krb5_free_principal(context, server);
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krb5_get_creds_opt_free(context, opt);
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krb5_cc_close (context, cache);
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krb5_free_context (context);
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return 0;
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}
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