713 lines
18 KiB
C
713 lines
18 KiB
C
/*
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* Copyright (c) 1997-2002 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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__RCSID("$Heimdal: kinit.c,v 1.90.4.5 2004/06/21 08:17:06 lha Exp $"
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"$NetBSD: kinit.c,v 1.11 2004/09/14 08:08:20 lha Exp $");
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int forwardable_flag = -1;
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int proxiable_flag = -1;
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int renewable_flag = -1;
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int renew_flag = 0;
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int validate_flag = 0;
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int version_flag = 0;
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int help_flag = 0;
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int addrs_flag = 1;
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struct getarg_strings extra_addresses;
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int anonymous_flag = 0;
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char *lifetime = NULL;
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char *renew_life = NULL;
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char *server = NULL;
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char *cred_cache = NULL;
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char *start_str = NULL;
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struct getarg_strings etype_str;
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int use_keytab = 0;
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char *keytab_str = NULL;
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int do_afslog = -1;
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#ifdef KRB4
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int get_v4_tgt = -1;
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int convert_524;
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#endif
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int fcache_version;
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static struct getargs args[] = {
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#ifdef KRB4
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{ "524init", '4', arg_flag, &get_v4_tgt,
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"obtain version 4 TGT" },
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{ "524convert", '9', arg_flag, &convert_524,
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"only convert ticket to version 4" },
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#endif
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{ "afslog", 0 , arg_flag, &do_afslog,
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"obtain afs tokens" },
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{ "cache", 'c', arg_string, &cred_cache,
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"credentials cache", "cachename" },
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{ "forwardable", 'f', arg_flag, &forwardable_flag,
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"get forwardable tickets"},
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{ "keytab", 't', arg_string, &keytab_str,
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"keytab to use", "keytabname" },
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{ "lifetime", 'l', arg_string, &lifetime,
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"lifetime of tickets", "time"},
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{ "proxiable", 'p', arg_flag, &proxiable_flag,
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"get proxiable tickets" },
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{ "renew", 'R', arg_flag, &renew_flag,
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"renew TGT" },
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{ "renewable", 0, arg_flag, &renewable_flag,
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"get renewable tickets" },
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{ "renewable-life", 'r', arg_string, &renew_life,
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"renewable lifetime of tickets", "time" },
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{ "server", 'S', arg_string, &server,
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"server to get ticket for", "principal" },
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{ "start-time", 's', arg_string, &start_str,
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"when ticket gets valid", "time" },
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{ "use-keytab", 'k', arg_flag, &use_keytab,
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"get key from keytab" },
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{ "validate", 'v', arg_flag, &validate_flag,
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"validate TGT" },
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{ "enctypes", 'e', arg_strings, &etype_str,
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"encryption types to use", "enctypes" },
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{ "fcache-version", 0, arg_integer, &fcache_version,
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"file cache version to create" },
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{ "addresses", 0, arg_negative_flag, &addrs_flag,
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"request a ticket with no addresses" },
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{ "extra-addresses",'a', arg_strings, &extra_addresses,
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"include these extra addresses", "addresses" },
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{ "anonymous", 0, arg_flag, &anonymous_flag,
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"request an anonymous ticket" },
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{ "version", 0, arg_flag, &version_flag },
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{ "help", 0, arg_flag, &help_flag }
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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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"[principal [command]]");
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exit (ret);
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}
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#ifdef KRB4
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/* for when the KDC tells us it's a v4 one, we try to talk that */
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static int
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key_to_key(const char *user,
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char *instance,
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const char *realm,
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const void *arg,
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des_cblock *key)
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{
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memcpy(key, arg, sizeof(des_cblock));
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return 0;
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}
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static int
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do_v4_fallback (krb5_context context,
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const krb5_principal principal,
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int lifetime,
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int use_srvtab, const char *srvtab_str,
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const char *passwd)
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{
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int ret;
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krb_principal princ;
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des_cblock key;
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krb5_error_code kret;
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if (lifetime == 0)
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lifetime = DEFAULT_TKT_LIFE;
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else
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lifetime = krb_time_to_life (0, lifetime);
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kret = krb5_524_conv_principal (context, principal,
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princ.name,
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princ.instance,
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princ.realm);
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if (kret) {
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krb5_warn (context, kret, "krb5_524_conv_principal");
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return 1;
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}
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if (use_srvtab || srvtab_str) {
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if (srvtab_str == NULL)
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srvtab_str = KEYFILE;
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ret = read_service_key (princ.name, princ.instance, princ.realm,
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0, srvtab_str, (char *)&key);
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if (ret) {
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warnx ("read_service_key %s: %s", srvtab_str,
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krb_get_err_text (ret));
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return 1;
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}
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ret = krb_get_in_tkt (princ.name, princ.instance, princ.realm,
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KRB_TICKET_GRANTING_TICKET, princ.realm,
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lifetime, key_to_key, NULL, key);
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} else {
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ret = krb_get_pw_in_tkt(princ.name, princ.instance, princ.realm,
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KRB_TICKET_GRANTING_TICKET, princ.realm,
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lifetime, passwd);
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}
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memset (key, 0, sizeof(key));
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if (ret) {
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warnx ("%s", krb_get_err_text(ret));
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return 1;
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}
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if (do_afslog && k_hasafs()) {
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if ((ret = krb_afslog(NULL, NULL)) != 0 && ret != KDC_PR_UNKNOWN) {
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if(ret > 0)
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warnx ("%s", krb_get_err_text(ret));
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else
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warnx ("failed to store AFS token");
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}
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}
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return 0;
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}
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/*
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* the special version of get_default_principal that takes v4 into account
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*/
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static krb5_error_code
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kinit_get_default_principal (krb5_context context,
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krb5_principal *princ)
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{
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krb5_error_code ret;
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krb5_ccache id;
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krb_principal v4_princ;
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int kret;
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ret = krb5_cc_default (context, &id);
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if (ret == 0) {
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ret = krb5_cc_get_principal (context, id, princ);
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krb5_cc_close (context, id);
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if (ret == 0)
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return 0;
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}
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kret = krb_get_tf_fullname (tkt_string(),
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v4_princ.name,
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v4_princ.instance,
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v4_princ.realm);
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if (kret == KSUCCESS) {
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ret = krb5_425_conv_principal (context,
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v4_princ.name,
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v4_princ.instance,
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v4_princ.realm,
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princ);
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if (ret == 0)
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return 0;
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}
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return krb5_get_default_principal (context, princ);
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}
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#else /* !KRB4 */
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static krb5_error_code
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kinit_get_default_principal (krb5_context context,
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krb5_principal *princ)
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{
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return krb5_get_default_principal (context, princ);
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}
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#endif /* !KRB4 */
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static krb5_error_code
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get_server(krb5_context context,
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krb5_principal client,
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const char *server,
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krb5_principal *princ)
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{
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krb5_realm *client_realm;
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if(server)
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return krb5_parse_name(context, server, princ);
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client_realm = krb5_princ_realm (context, client);
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return krb5_make_principal(context, princ, *client_realm,
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KRB5_TGS_NAME, *client_realm, NULL);
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}
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#ifdef KRB4
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static krb5_error_code
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do_524init(krb5_context context, krb5_ccache ccache,
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krb5_creds *creds, const char *server)
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{
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krb5_error_code ret;
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CREDENTIALS c;
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krb5_creds in_creds, *real_creds;
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if(creds != NULL)
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real_creds = creds;
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else {
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krb5_principal client;
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krb5_cc_get_principal(context, ccache, &client);
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memset(&in_creds, 0, sizeof(in_creds));
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ret = get_server(context, client, server, &in_creds.server);
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if(ret) {
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krb5_free_principal(context, client);
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return ret;
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}
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in_creds.client = client;
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ret = krb5_get_credentials(context, 0, ccache, &in_creds, &real_creds);
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krb5_free_principal(context, client);
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krb5_free_principal(context, in_creds.server);
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if(ret)
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return ret;
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}
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ret = krb524_convert_creds_kdc_ccache(context, ccache, real_creds, &c);
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if(ret)
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krb5_warn(context, ret, "converting creds");
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else {
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int tret = tf_setup(&c, c.pname, c.pinst);
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if(tret)
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krb5_warnx(context, "saving v4 creds: %s", krb_get_err_text(tret));
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}
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if(creds == NULL)
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krb5_free_creds(context, real_creds);
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memset(&c, 0, sizeof(c));
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return ret;
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}
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#endif
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static int
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renew_validate(krb5_context context,
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int renew,
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int validate,
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krb5_ccache cache,
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const char *server,
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krb5_deltat life)
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{
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krb5_error_code ret;
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krb5_creds in, *out;
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krb5_kdc_flags flags;
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memset(&in, 0, sizeof(in));
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ret = krb5_cc_get_principal(context, cache, &in.client);
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if(ret) {
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krb5_warn(context, ret, "krb5_cc_get_principal");
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return ret;
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}
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ret = get_server(context, in.client, server, &in.server);
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if(ret) {
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krb5_warn(context, ret, "get_server");
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goto out;
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}
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flags.i = 0;
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flags.b.renewable = flags.b.renew = renew;
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flags.b.validate = validate;
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if (forwardable_flag != -1)
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flags.b.forwardable = forwardable_flag;
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if (proxiable_flag != -1)
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flags.b.proxiable = proxiable_flag;
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if (anonymous_flag != -1)
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flags.b.request_anonymous = anonymous_flag;
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if(life)
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in.times.endtime = time(NULL) + life;
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ret = krb5_get_kdc_cred(context,
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cache,
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flags,
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NULL,
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NULL,
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&in,
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&out);
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if(ret) {
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krb5_warn(context, ret, "krb5_get_kdc_cred");
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goto out;
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}
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ret = krb5_cc_initialize(context, cache, in.client);
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if(ret) {
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krb5_free_creds (context, out);
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krb5_warn(context, ret, "krb5_cc_initialize");
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goto out;
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}
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ret = krb5_cc_store_cred(context, cache, out);
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if(ret == 0 && server == NULL) {
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#ifdef KRB4
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/* only do this if it's a general renew-my-tgt request */
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if(get_v4_tgt)
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do_524init(context, cache, out, NULL);
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#endif
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if(do_afslog && k_hasafs())
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krb5_afslog(context, cache, NULL, NULL);
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}
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krb5_free_creds (context, out);
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if(ret) {
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krb5_warn(context, ret, "krb5_cc_store_cred");
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goto out;
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}
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out:
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krb5_free_creds_contents(context, &in);
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return ret;
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}
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static krb5_error_code
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get_new_tickets(krb5_context context,
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krb5_principal principal,
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krb5_ccache ccache,
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krb5_deltat ticket_life)
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{
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krb5_error_code ret;
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krb5_get_init_creds_opt opt;
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krb5_addresses no_addrs;
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krb5_creds cred;
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char passwd[256];
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krb5_deltat start_time = 0;
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krb5_deltat renew = 0;
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memset(&cred, 0, sizeof(cred));
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krb5_get_init_creds_opt_init (&opt);
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krb5_get_init_creds_opt_set_default_flags(context, "kinit",
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/* XXX */principal->realm, &opt);
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if(forwardable_flag != -1)
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krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag);
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if(proxiable_flag != -1)
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krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag);
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if(anonymous_flag != -1)
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krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag);
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if (!addrs_flag) {
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no_addrs.len = 0;
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no_addrs.val = NULL;
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krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs);
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}
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if (renew_life == NULL && renewable_flag)
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renew_life = "1 month";
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if(renew_life) {
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renew = parse_time (renew_life, "s");
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if (renew < 0)
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errx (1, "unparsable time: %s", renew_life);
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krb5_get_init_creds_opt_set_renew_life (&opt, renew);
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}
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if(ticket_life != 0)
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krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life);
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if(start_str) {
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int tmp = parse_time (start_str, "s");
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if (tmp < 0)
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errx (1, "unparsable time: %s", start_str);
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start_time = tmp;
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}
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if(etype_str.num_strings) {
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krb5_enctype *enctype = NULL;
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int i;
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enctype = malloc(etype_str.num_strings * sizeof(*enctype));
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if(enctype == NULL)
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errx(1, "out of memory");
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for(i = 0; i < etype_str.num_strings; i++) {
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ret = krb5_string_to_enctype(context,
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etype_str.strings[i],
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&enctype[i]);
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if(ret)
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errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
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}
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krb5_get_init_creds_opt_set_etype_list(&opt, enctype,
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etype_str.num_strings);
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}
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if(use_keytab || keytab_str) {
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krb5_keytab kt;
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if(keytab_str)
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ret = krb5_kt_resolve(context, keytab_str, &kt);
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else
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ret = krb5_kt_default(context, &kt);
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if (ret)
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krb5_err (context, 1, ret, "resolving keytab");
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ret = krb5_get_init_creds_keytab (context,
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&cred,
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principal,
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kt,
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start_time,
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server,
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&opt);
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krb5_kt_close(context, kt);
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} else {
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char *p, *prompt;
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krb5_unparse_name (context, principal, &p);
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asprintf (&prompt, "%s's Password: ", p);
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free (p);
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if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
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memset(passwd, 0, sizeof(passwd));
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exit(1);
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}
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free (prompt);
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ret = krb5_get_init_creds_password (context,
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&cred,
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principal,
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passwd,
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krb5_prompter_posix,
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NULL,
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start_time,
|
|
server,
|
|
&opt);
|
|
}
|
|
#ifdef KRB4
|
|
if (ret == KRB5KRB_AP_ERR_V4_REPLY || ret == KRB5_KDC_UNREACH) {
|
|
int exit_val;
|
|
|
|
exit_val = do_v4_fallback (context, principal, ticket_life,
|
|
use_keytab, keytab_str, passwd);
|
|
get_v4_tgt = 0;
|
|
do_afslog = 0;
|
|
memset(passwd, 0, sizeof(passwd));
|
|
if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY)
|
|
return exit_val;
|
|
}
|
|
#endif
|
|
memset(passwd, 0, sizeof(passwd));
|
|
|
|
switch(ret){
|
|
case 0:
|
|
break;
|
|
case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */
|
|
exit(1);
|
|
case KRB5KRB_AP_ERR_BAD_INTEGRITY:
|
|
case KRB5KRB_AP_ERR_MODIFIED:
|
|
krb5_errx(context, 1, "Password incorrect");
|
|
break;
|
|
default:
|
|
krb5_err(context, 1, ret, "krb5_get_init_creds");
|
|
}
|
|
|
|
if(ticket_life != 0) {
|
|
if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) {
|
|
char life[32];
|
|
unparse_time(cred.times.endtime - cred.times.starttime,
|
|
life, sizeof(life));
|
|
krb5_warnx(context, "NOTICE: ticket lifetime is %s", life);
|
|
}
|
|
}
|
|
if(renew != 0) {
|
|
if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) {
|
|
char life[32];
|
|
unparse_time(cred.times.renew_till - cred.times.starttime,
|
|
life, sizeof(life));
|
|
krb5_warnx(context, "NOTICE: ticket renewable lifetime is %s",
|
|
life);
|
|
}
|
|
}
|
|
|
|
ret = krb5_cc_initialize (context, ccache, cred.client);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "krb5_cc_initialize");
|
|
|
|
ret = krb5_cc_store_cred (context, ccache, &cred);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "krb5_cc_store_cred");
|
|
|
|
krb5_free_creds_contents (context, &cred);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
krb5_error_code ret;
|
|
krb5_context context;
|
|
krb5_ccache ccache;
|
|
krb5_principal principal;
|
|
int optind = 0;
|
|
krb5_deltat ticket_life = 0;
|
|
|
|
setprogname (argv[0]);
|
|
|
|
ret = krb5_init_context (&context);
|
|
if (ret)
|
|
errx(1, "krb5_init_context failed: %d", ret);
|
|
|
|
if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind))
|
|
usage(1);
|
|
|
|
if (help_flag)
|
|
usage (0);
|
|
|
|
if(version_flag) {
|
|
print_version(NULL);
|
|
exit(0);
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argv[0]) {
|
|
ret = krb5_parse_name (context, argv[0], &principal);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "krb5_parse_name");
|
|
} else {
|
|
ret = kinit_get_default_principal (context, &principal);
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "krb5_get_default_principal");
|
|
}
|
|
|
|
if(fcache_version)
|
|
krb5_set_fcache_version(context, fcache_version);
|
|
|
|
if(cred_cache)
|
|
ret = krb5_cc_resolve(context, cred_cache, &ccache);
|
|
else {
|
|
if(argc > 1) {
|
|
char s[1024];
|
|
ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache);
|
|
if(ret)
|
|
krb5_err(context, 1, ret, "creating cred cache");
|
|
snprintf(s, sizeof(s), "%s:%s",
|
|
krb5_cc_get_type(context, ccache),
|
|
krb5_cc_get_name(context, ccache));
|
|
setenv("KRB5CCNAME", s, 1);
|
|
#ifdef KRB4
|
|
{
|
|
int fd;
|
|
snprintf(s, sizeof(s), "%s_XXXXXX", TKT_ROOT);
|
|
if((fd = mkstemp(s)) >= 0) {
|
|
close(fd);
|
|
setenv("KRBTKFILE", s, 1);
|
|
}
|
|
}
|
|
#endif
|
|
} else
|
|
ret = krb5_cc_default (context, &ccache);
|
|
}
|
|
if (ret)
|
|
krb5_err (context, 1, ret, "resolving credentials cache");
|
|
|
|
if (argc > 1 && k_hasafs ())
|
|
k_setpag();
|
|
|
|
if (lifetime) {
|
|
int tmp = parse_time (lifetime, "s");
|
|
if (tmp < 0)
|
|
errx (1, "unparsable time: %s", lifetime);
|
|
|
|
ticket_life = tmp;
|
|
}
|
|
#ifdef KRB4
|
|
if(get_v4_tgt == -1)
|
|
krb5_appdefault_boolean(context, "kinit",
|
|
(krb5_realm)krb5_principal_get_realm(context, principal),
|
|
"krb4_get_tickets", TRUE, &get_v4_tgt);
|
|
#endif
|
|
if(do_afslog == -1)
|
|
krb5_appdefault_boolean(context, "kinit",
|
|
krb5_principal_get_realm(context, principal),
|
|
"afslog", TRUE, &do_afslog);
|
|
|
|
if(!addrs_flag && extra_addresses.num_strings > 0)
|
|
krb5_errx(context, 1, "specifying both extra addresses and "
|
|
"no addresses makes no sense");
|
|
{
|
|
int i;
|
|
krb5_addresses addresses;
|
|
memset(&addresses, 0, sizeof(addresses));
|
|
for(i = 0; i < extra_addresses.num_strings; i++) {
|
|
ret = krb5_parse_address(context, extra_addresses.strings[i],
|
|
&addresses);
|
|
if (ret == 0) {
|
|
krb5_add_extra_addresses(context, &addresses);
|
|
krb5_free_addresses(context, &addresses);
|
|
}
|
|
}
|
|
free_getarg_strings(&extra_addresses);
|
|
}
|
|
|
|
|
|
if(renew_flag || validate_flag) {
|
|
ret = renew_validate(context, renew_flag, validate_flag,
|
|
ccache, server, ticket_life);
|
|
exit(ret != 0);
|
|
}
|
|
|
|
#ifdef KRB4
|
|
if(!convert_524)
|
|
#endif
|
|
get_new_tickets(context, principal, ccache, ticket_life);
|
|
|
|
#ifdef KRB4
|
|
if(get_v4_tgt)
|
|
do_524init(context, ccache, NULL, server);
|
|
#endif
|
|
if(do_afslog && k_hasafs())
|
|
krb5_afslog(context, ccache, NULL, NULL);
|
|
if(argc > 1) {
|
|
ret = simple_execvp(argv[1], argv+1);
|
|
krb5_cc_destroy(context, ccache);
|
|
#ifdef KRB4
|
|
dest_tkt();
|
|
#endif
|
|
if(k_hasafs())
|
|
k_unlog();
|
|
} else {
|
|
krb5_cc_close (context, ccache);
|
|
ret = 0;
|
|
}
|
|
krb5_free_principal(context, principal);
|
|
krb5_free_context (context);
|
|
return ret;
|
|
}
|