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/*
SSSD
Kerberos Provider Common Functions
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2008-2009 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "providers/dp_backend.h"
#include "providers/krb5/krb5_common.h"
struct dp_option default_krb5_opts[] = {
{ "krb5_kdcip", DP_OPT_STRING, NULL_STRING, NULL_STRING },
{ "krb5_realm", DP_OPT_STRING, NULL_STRING, NULL_STRING },
{ "krb5_ccachedir", DP_OPT_STRING, { "/tmp" }, NULL_STRING },
{ "krb5_ccname_tmpl", DP_OPT_STRING, { "FILE:%d/krb5cc_%U_XXXXXX" }, NULL_STRING},
{ "krb5_changepw_principle", DP_OPT_STRING, { "kadmin/changepw" }, NULL_STRING },
{ "krb5_auth_timeout", DP_OPT_NUMBER, { .number = 15 }, NULL_NUMBER },
};
errno_t check_and_export_options(struct dp_option *opts,
struct sss_domain_info *dom)
{
int ret;
char *value;
const char *realm;
const char *dummy;
struct stat stat_buf;
dummy = dp_opt_get_cstring(opts, KRB5_KDC);
if (dummy == NULL) {
DEBUG(1, ("No KDC configured, "
"using kerberos defaults from /etc/krb5.conf"));
} else {
ret = setenv(SSSD_KRB5_KDC, dummy, 1);
if (ret != EOK) {
DEBUG(2, ("setenv %s failed, authentication might fail.\n",
SSSD_KRB5_KDC));
}
}
realm = dp_opt_get_cstring(opts, KRB5_REALM);
if (realm == NULL) {
ret = dp_opt_set_string(opts, KRB5_REALM, dom->name);
if (ret != EOK) {
DEBUG(1, ("dp_opt_set_string failed.\n"));
return ret;
}
realm = dom->name;
}
ret = setenv(SSSD_KRB5_REALM, realm, 1);
if (ret != EOK) {
DEBUG(2, ("setenv %s failed, authentication might fail.\n",
SSSD_KRB5_REALM));
}
dummy = dp_opt_get_cstring(opts, KRB5_CCACHEDIR);
ret = lstat(dummy, &stat_buf);
if (ret != EOK) {
DEBUG(1, ("lstat for [%s] failed: [%d][%s].\n", dummy, errno,
strerror(errno)));
return ret;
}
if ( !S_ISDIR(stat_buf.st_mode) ) {
DEBUG(1, ("Value of krb5ccache_dir [%s] is not a directory.\n", dummy));
return EINVAL;
}
dummy = dp_opt_get_cstring(opts, KRB5_CCNAME_TMPL);
if (dummy == NULL) {
DEBUG(1, ("Missing credential cache name template.\n"));
return EINVAL;
}
if (dummy[0] != '/' && strncmp(dummy, "FILE:", 5) != 0) {
DEBUG(1, ("Currently only file based credential caches are supported "
"and krb5ccname_template must start with '/' or 'FILE:'\n"));
return EINVAL;
}
dummy = dp_opt_get_cstring(opts, KRB5_CHANGEPW_PRINC);
if (dummy == NULL) {
DEBUG(1, ("Missing change password principle.\n"));
return EINVAL;
}
if (strchr(dummy, '@') == NULL) {
value = talloc_asprintf(opts, "%s@%s", dummy, realm);
if (value == NULL) {
DEBUG(7, ("talloc_asprintf failed.\n"));
return ENOMEM;
}
ret = dp_opt_set_string(opts, KRB5_CHANGEPW_PRINC, value);
if (ret != EOK) {
DEBUG(1, ("dp_opt_set_string failed.\n"));
return ret;
}
dummy = value;
}
ret = setenv(SSSD_KRB5_CHANGEPW_PRINCIPLE, dummy, 1);
if (ret != EOK) {
DEBUG(2, ("setenv %s failed, password change might fail.\n",
SSSD_KRB5_CHANGEPW_PRINCIPLE));
}
return EOK;
}
errno_t krb5_get_options(TALLOC_CTX *memctx, struct confdb_ctx *cdb,
const char *conf_path, struct dp_option **_opts)
{
int ret;
struct dp_option *opts;
opts = talloc_zero(memctx, struct dp_option);
if (opts == NULL) {
DEBUG(1, ("talloc_zero failed.\n"));
return ENOMEM;
}
ret = dp_get_options(opts, cdb, conf_path, default_krb5_opts,
KRB5_OPTS, &opts);
if (ret != EOK) {
DEBUG(1, ("dp_get_options failed.\n"));
goto done;
}
*_opts = opts;
ret = EOK;
done:
if (ret != EOK) {
talloc_zfree(opts);
}
return ret;
}
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