freebsd-dev/crypto/heimdal/kuser/kinit.c
2001-02-13 16:46:19 +00:00

579 lines
15 KiB
C

/*
* Copyright (c) 1997-2001 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("$Id: kinit.c,v 1.69 2001/01/05 16:32:55 joda Exp $");
#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,
char *passwd, size_t passwd_size)
{
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_tkt2(princ.name, princ.instance, princ.realm,
KRB_TICKET_GRANTING_TICKET, princ.realm,
lifetime, passwd, &key);
}
memset (passwd, 0, passwd_size);
memset (key, 0, sizeof(key));
if (ret) {
warnx ("%s", krb_get_err_text(ret));
return 1;
}
if (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 */
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;
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;
#ifdef KRB4
extern int do_afslog;
extern int get_v4_tgt;
#endif
int fcache_version;
static struct getargs args[] = {
#ifdef KRB4
{ "524init", '4', arg_flag, &get_v4_tgt,
"obtain version 4 TGT" },
{ "afslog", 0 , arg_flag, &do_afslog,
"obtain afs tokens" },
#endif
{ "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" },
{ "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]");
exit (ret);
}
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;
}
if(server) {
ret = krb5_parse_name(context, server, &in.server);
if(ret) {
krb5_warn(context, ret, "krb5_parse_name");
goto out;
}
} else {
krb5_realm *client_realm = krb5_princ_realm (context, in.client);
ret = krb5_make_principal(context, &in.server, *client_realm,
KRB5_TGS_NAME, *client_realm, NULL);
if(ret) {
krb5_warn(context, ret, "krb5_make_principal");
goto out;
}
}
flags.i = 0;
flags.b.renewable = flags.b.renew = renew;
flags.b.validate = validate;
flags.b.forwardable = forwardable_flag;
flags.b.proxiable = proxiable_flag;
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);
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;
}
int
main (int argc, char **argv)
{
krb5_error_code ret;
krb5_context context;
krb5_ccache ccache;
krb5_principal principal;
krb5_creds cred;
int optind = 0;
krb5_get_init_creds_opt opt;
krb5_deltat start_time = 0;
krb5_deltat ticket_life = 0;
krb5_addresses no_addrs;
char passwd[256];
set_progname (argv[0]);
memset(&cred, 0, sizeof(cred));
ret = krb5_init_context (&context);
if (ret)
errx(1, "krb5_init_context failed: %d", ret);
/* XXX no way to figure out if set without explict test */
if(krb5_config_get_string(context, NULL, "libdefaults",
"forwardable", NULL))
forwardable_flag = krb5_config_get_bool (context, NULL,
"libdefaults",
"forwardable",
NULL);
#ifdef KRB4
get_v4_tgt = krb5_config_get_bool_default (context, NULL,
get_v4_tgt,
"libdefaults",
"krb4_get_tickets",
NULL);
#endif
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 (argc > 1)
usage (1);
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
ret = krb5_cc_default (context, &ccache);
if (ret)
krb5_err (context, 1, ret, "resolving credentials cache");
if (lifetime) {
int tmp = parse_time (lifetime, "s");
if (tmp < 0)
errx (1, "unparsable time: %s", lifetime);
ticket_life = tmp;
}
if(renew_flag || validate_flag) {
ret = renew_validate(context, renew_flag, validate_flag,
ccache, server, ticket_life);
exit(ret != 0);
}
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) {
int tmp = parse_time (renew_life, "s");
if (tmp < 0)
errx (1, "unparsable time: %s", renew_life);
krb5_get_init_creds_opt_set_renew_life (&opt, tmp);
} else if (renewable_flag)
krb5_get_init_creds_opt_set_renew_life (&opt, 1 << 30);
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);
}
#ifdef KRB4
get_v4_tgt = krb5_config_get_bool_default (context,
NULL,
get_v4_tgt,
"realms",
krb5_princ_realm(context,
principal),
"krb4_get_tickets",
NULL);
#endif
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, sizeof(passwd));
memset(passwd, 0, sizeof(passwd));
if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY) {
krb5_free_context (context);
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 */
memset(passwd, 0, sizeof(passwd));
exit(1);
case KRB5KRB_AP_ERR_BAD_INTEGRITY:
case KRB5KRB_AP_ERR_MODIFIED:
memset(passwd, 0, sizeof(passwd));
krb5_errx(context, 1, "Password incorrect");
break;
default:
krb5_err(context, 1, ret, "krb5_get_init_creds");
}
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");
#ifdef KRB4
if(get_v4_tgt) {
CREDENTIALS c;
ret = krb524_convert_creds_kdc(context, ccache, &cred, &c);
if(ret)
krb5_warn(context, ret, "converting creds");
else
tf_setup(&c, c.pname, c.pinst);
memset(&c, 0, sizeof(c));
}
if(do_afslog && k_hasafs())
krb5_afslog(context, ccache, NULL, NULL);
#endif
krb5_free_creds_contents (context, &cred);
krb5_cc_close (context, ccache);
krb5_free_context (context);
return 0;
}