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NetBSD/crypto/dist/heimdal/kuser/kinit.c

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/*
* Copyright (c) 1997-2002 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "kuser_locl.h"
__RCSID("$Heimdal: kinit.c,v 1.90.4.5 2004/06/21 08:17:06 lha Exp $"
"$NetBSD: kinit.c,v 1.11 2004/09/14 08:08:20 lha Exp $");
int forwardable_flag = -1;
int proxiable_flag = -1;
int renewable_flag = -1;
int renew_flag = 0;
int validate_flag = 0;
int version_flag = 0;
int help_flag = 0;
int addrs_flag = 1;
struct getarg_strings extra_addresses;
int anonymous_flag = 0;
char *lifetime = NULL;
char *renew_life = NULL;
char *server = NULL;
char *cred_cache = NULL;
char *start_str = NULL;
struct getarg_strings etype_str;
int use_keytab = 0;
char *keytab_str = NULL;
int do_afslog = -1;
#ifdef KRB4
int get_v4_tgt = -1;
int convert_524;
#endif
int fcache_version;
static struct getargs args[] = {
#ifdef KRB4
{ "524init", '4', arg_flag, &get_v4_tgt,
"obtain version 4 TGT" },
{ "524convert", '9', arg_flag, &convert_524,
"only convert ticket to version 4" },
#endif
{ "afslog", 0 , arg_flag, &do_afslog,
"obtain afs tokens" },
{ "cache", 'c', arg_string, &cred_cache,
"credentials cache", "cachename" },
{ "forwardable", 'f', arg_flag, &forwardable_flag,
"get forwardable tickets"},
{ "keytab", 't', arg_string, &keytab_str,
"keytab to use", "keytabname" },
{ "lifetime", 'l', arg_string, &lifetime,
"lifetime of tickets", "time"},
{ "proxiable", 'p', arg_flag, &proxiable_flag,
"get proxiable tickets" },
{ "renew", 'R', arg_flag, &renew_flag,
"renew TGT" },
{ "renewable", 0, arg_flag, &renewable_flag,
"get renewable tickets" },
{ "renewable-life", 'r', arg_string, &renew_life,
"renewable lifetime of tickets", "time" },
{ "server", 'S', arg_string, &server,
"server to get ticket for", "principal" },
{ "start-time", 's', arg_string, &start_str,
"when ticket gets valid", "time" },
{ "use-keytab", 'k', arg_flag, &use_keytab,
"get key from keytab" },
{ "validate", 'v', arg_flag, &validate_flag,
"validate TGT" },
{ "enctypes", 'e', arg_strings, &etype_str,
"encryption types to use", "enctypes" },
{ "fcache-version", 0, arg_integer, &fcache_version,
"file cache version to create" },
{ "addresses", 0, arg_negative_flag, &addrs_flag,
"request a ticket with no addresses" },
{ "extra-addresses",'a', arg_strings, &extra_addresses,
"include these extra addresses", "addresses" },
{ "anonymous", 0, arg_flag, &anonymous_flag,
"request an anonymous ticket" },
{ "version", 0, arg_flag, &version_flag },
{ "help", 0, arg_flag, &help_flag }
};
static void
usage (int ret)
{
arg_printusage (args,
sizeof(args)/sizeof(*args),
NULL,
"[principal [command]]");
exit (ret);
}
#ifdef KRB4
/* for when the KDC tells us it's a v4 one, we try to talk that */
static int
key_to_key(const char *user,
char *instance,
const char *realm,
const void *arg,
des_cblock *key)
{
memcpy(key, arg, sizeof(des_cblock));
return 0;
}
static int
do_v4_fallback (krb5_context context,
const krb5_principal principal,
int lifetime,
int use_srvtab, const char *srvtab_str,
const char *passwd)
{
int ret;
krb_principal princ;
des_cblock key;
krb5_error_code kret;
if (lifetime == 0)
lifetime = DEFAULT_TKT_LIFE;
else
lifetime = krb_time_to_life (0, lifetime);
kret = krb5_524_conv_principal (context, principal,
princ.name,
princ.instance,
princ.realm);
if (kret) {
krb5_warn (context, kret, "krb5_524_conv_principal");
return 1;
}
if (use_srvtab || srvtab_str) {
if (srvtab_str == NULL)
srvtab_str = KEYFILE;
ret = read_service_key (princ.name, princ.instance, princ.realm,
0, srvtab_str, (char *)&key);
if (ret) {
warnx ("read_service_key %s: %s", srvtab_str,
krb_get_err_text (ret));
return 1;
}
ret = krb_get_in_tkt (princ.name, princ.instance, princ.realm,
KRB_TICKET_GRANTING_TICKET, princ.realm,
lifetime, key_to_key, NULL, key);
} else {
ret = krb_get_pw_in_tkt(princ.name, princ.instance, princ.realm,
KRB_TICKET_GRANTING_TICKET, princ.realm,
lifetime, passwd);
}
memset (key, 0, sizeof(key));
if (ret) {
warnx ("%s", krb_get_err_text(ret));
return 1;
}
if (do_afslog && k_hasafs()) {
if ((ret = krb_afslog(NULL, NULL)) != 0 && ret != KDC_PR_UNKNOWN) {
if(ret > 0)
warnx ("%s", krb_get_err_text(ret));
else
warnx ("failed to store AFS token");
}
}
return 0;
}
/*
* the special version of get_default_principal that takes v4 into account
*/
static krb5_error_code
kinit_get_default_principal (krb5_context context,
krb5_principal *princ)
{
krb5_error_code ret;
krb5_ccache id;
krb_principal v4_princ;
int kret;
ret = krb5_cc_default (context, &id);
if (ret == 0) {
ret = krb5_cc_get_principal (context, id, princ);
krb5_cc_close (context, id);
if (ret == 0)
return 0;
}
kret = krb_get_tf_fullname (tkt_string(),
v4_princ.name,
v4_princ.instance,
v4_princ.realm);
if (kret == KSUCCESS) {
ret = krb5_425_conv_principal (context,
v4_princ.name,
v4_princ.instance,
v4_princ.realm,
princ);
if (ret == 0)
return 0;
}
return krb5_get_default_principal (context, princ);
}
#else /* !KRB4 */
static krb5_error_code
kinit_get_default_principal (krb5_context context,
krb5_principal *princ)
{
return krb5_get_default_principal (context, princ);
}
#endif /* !KRB4 */
static krb5_error_code
get_server(krb5_context context,
krb5_principal client,
const char *server,
krb5_principal *princ)
{
krb5_realm *client_realm;
if(server)
return krb5_parse_name(context, server, princ);
client_realm = krb5_princ_realm (context, client);
return krb5_make_principal(context, princ, *client_realm,
KRB5_TGS_NAME, *client_realm, NULL);
}
#ifdef KRB4
static krb5_error_code
do_524init(krb5_context context, krb5_ccache ccache,
krb5_creds *creds, const char *server)
{
krb5_error_code ret;
CREDENTIALS c;
krb5_creds in_creds, *real_creds;
if(creds != NULL)
real_creds = creds;
else {
krb5_principal client;
krb5_cc_get_principal(context, ccache, &client);
memset(&in_creds, 0, sizeof(in_creds));
ret = get_server(context, client, server, &in_creds.server);
if(ret) {
krb5_free_principal(context, client);
return ret;
}
in_creds.client = client;
ret = krb5_get_credentials(context, 0, ccache, &in_creds, &real_creds);
krb5_free_principal(context, client);
krb5_free_principal(context, in_creds.server);
if(ret)
return ret;
}
ret = krb524_convert_creds_kdc_ccache(context, ccache, real_creds, &c);
if(ret)
krb5_warn(context, ret, "converting creds");
else {
int tret = tf_setup(&c, c.pname, c.pinst);
if(tret)
krb5_warnx(context, "saving v4 creds: %s", krb_get_err_text(tret));
}
if(creds == NULL)
krb5_free_creds(context, real_creds);
memset(&c, 0, sizeof(c));
return ret;
}
#endif
static int
renew_validate(krb5_context context,
int renew,
int validate,
krb5_ccache cache,
const char *server,
krb5_deltat life)
{
krb5_error_code ret;
krb5_creds in, *out;
krb5_kdc_flags flags;
memset(&in, 0, sizeof(in));
ret = krb5_cc_get_principal(context, cache, &in.client);
if(ret) {
krb5_warn(context, ret, "krb5_cc_get_principal");
return ret;
}
ret = get_server(context, in.client, server, &in.server);
if(ret) {
krb5_warn(context, ret, "get_server");
goto out;
}
flags.i = 0;
flags.b.renewable = flags.b.renew = renew;
flags.b.validate = validate;
if (forwardable_flag != -1)
flags.b.forwardable = forwardable_flag;
if (proxiable_flag != -1)
flags.b.proxiable = proxiable_flag;
if (anonymous_flag != -1)
flags.b.request_anonymous = anonymous_flag;
if(life)
in.times.endtime = time(NULL) + life;
ret = krb5_get_kdc_cred(context,
cache,
flags,
NULL,
NULL,
&in,
&out);
if(ret) {
krb5_warn(context, ret, "krb5_get_kdc_cred");
goto out;
}
ret = krb5_cc_initialize(context, cache, in.client);
if(ret) {
krb5_free_creds (context, out);
krb5_warn(context, ret, "krb5_cc_initialize");
goto out;
}
ret = krb5_cc_store_cred(context, cache, out);
if(ret == 0 && server == NULL) {
#ifdef KRB4
/* only do this if it's a general renew-my-tgt request */
if(get_v4_tgt)
do_524init(context, cache, out, NULL);
#endif
if(do_afslog && k_hasafs())
krb5_afslog(context, cache, NULL, NULL);
}
krb5_free_creds (context, out);
if(ret) {
krb5_warn(context, ret, "krb5_cc_store_cred");
goto out;
}
out:
krb5_free_creds_contents(context, &in);
return ret;
}
static krb5_error_code
get_new_tickets(krb5_context context,
krb5_principal principal,
krb5_ccache ccache,
krb5_deltat ticket_life)
{
krb5_error_code ret;
krb5_get_init_creds_opt opt;
krb5_addresses no_addrs;
krb5_creds cred;
char passwd[256];
krb5_deltat start_time = 0;
krb5_deltat renew = 0;
memset(&cred, 0, sizeof(cred));
krb5_get_init_creds_opt_init (&opt);
krb5_get_init_creds_opt_set_default_flags(context, "kinit",
/* XXX */principal->realm, &opt);
if(forwardable_flag != -1)
krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag);
if(proxiable_flag != -1)
krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag);
if(anonymous_flag != -1)
krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag);
if (!addrs_flag) {
no_addrs.len = 0;
no_addrs.val = NULL;
krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs);
}
if (renew_life == NULL && renewable_flag)
renew_life = "1 month";
if(renew_life) {
renew = parse_time (renew_life, "s");
if (renew < 0)
errx (1, "unparsable time: %s", renew_life);
krb5_get_init_creds_opt_set_renew_life (&opt, renew);
}
if(ticket_life != 0)
krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life);
if(start_str) {
int tmp = parse_time (start_str, "s");
if (tmp < 0)
errx (1, "unparsable time: %s", start_str);
start_time = tmp;
}
if(etype_str.num_strings) {
krb5_enctype *enctype = NULL;
int i;
enctype = malloc(etype_str.num_strings * sizeof(*enctype));
if(enctype == NULL)
errx(1, "out of memory");
for(i = 0; i < etype_str.num_strings; i++) {
ret = krb5_string_to_enctype(context,
etype_str.strings[i],
&enctype[i]);
if(ret)
errx(1, "unrecognized enctype: %s", etype_str.strings[i]);
}
krb5_get_init_creds_opt_set_etype_list(&opt, enctype,
etype_str.num_strings);
}
if(use_keytab || keytab_str) {
krb5_keytab kt;
if(keytab_str)
ret = krb5_kt_resolve(context, keytab_str, &kt);
else
ret = krb5_kt_default(context, &kt);
if (ret)
krb5_err (context, 1, ret, "resolving keytab");
ret = krb5_get_init_creds_keytab (context,
&cred,
principal,
kt,
start_time,
server,
&opt);
krb5_kt_close(context, kt);
} else {
char *p, *prompt;
krb5_unparse_name (context, principal, &p);
asprintf (&prompt, "%s's Password: ", p);
free (p);
if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){
memset(passwd, 0, sizeof(passwd));
exit(1);
}
free (prompt);
ret = krb5_get_init_creds_password (context,
&cred,
principal,
passwd,
krb5_prompter_posix,
NULL,
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;
}
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