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/*
SSSD
Kerberos 5 Backend Module
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 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 <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "util/child_common.h"
#include "providers/krb5/krb5_auth.h"
#include "providers/krb5/krb5_common.h"
#include "providers/krb5/krb5_init_shared.h"
struct krb5_options {
struct dp_option *opts;
struct krb5_ctx *auth_ctx;
};
struct krb5_options *krb5_options = NULL;
struct bet_ops krb5_auth_ops = {
.handler = krb5_pam_handler,
.finalize = NULL,
};
int krb5_ctx_re_destructor(void *memctx)
{
struct krb5_ctx *ctx = (struct krb5_ctx *) memctx;
if (ctx->illegal_path_re) {
pcre_free(ctx->illegal_path_re);
ctx->illegal_path_re = NULL;
}
return 0;
}
int sssm_krb5_auth_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
struct krb5_ctx *ctx = NULL;
int ret;
const char *krb5_servers;
const char *krb5_backup_servers;
const char *krb5_kpasswd_servers;
const char *krb5_backup_kpasswd_servers;
const char *krb5_realm;
const char *errstr;
int errval;
int errpos;
if (krb5_options == NULL) {
krb5_options = talloc_zero(bectx, struct krb5_options);
if (krb5_options == NULL) {
DEBUG(1, ("talloc_zero failed.\n"));
return ENOMEM;
}
ret = krb5_get_options(krb5_options, bectx->cdb, bectx->conf_path,
&krb5_options->opts);
if (ret != EOK) {
DEBUG(1, ("krb5_get_options failed.\n"));
return ret;
}
}
if (krb5_options->auth_ctx != NULL) {
*ops = &krb5_auth_ops;
*pvt_auth_data = krb5_options->auth_ctx;
return EOK;
}
ctx = talloc_zero(bectx, struct krb5_ctx);
if (!ctx) {
DEBUG(1, ("talloc failed.\n"));
return ENOMEM;
}
krb5_options->auth_ctx = ctx;
ctx->action = INIT_PW;
ctx->opts = krb5_options->opts;
ctx->config_type = K5C_GENERIC;
krb5_servers = dp_opt_get_string(ctx->opts, KRB5_KDC);
krb5_backup_servers = dp_opt_get_string(ctx->opts, KRB5_BACKUP_KDC);
krb5_realm = dp_opt_get_string(ctx->opts, KRB5_REALM);
if (krb5_realm == NULL) {
DEBUG(0, ("Missing krb5_realm option!\n"));
return EINVAL;
}
ret = krb5_service_init(ctx, bectx,
SSS_KRB5KDC_FO_SRV, krb5_servers,
krb5_backup_servers, krb5_realm,
dp_opt_get_bool(krb5_options->opts,
KRB5_USE_KDCINFO),
&ctx->service);
if (ret != EOK) {
DEBUG(0, ("Failed to init KRB5 failover service!\n"));
return ret;
}
krb5_kpasswd_servers = dp_opt_get_string(ctx->opts, KRB5_KPASSWD);
krb5_backup_kpasswd_servers = dp_opt_get_string(ctx->opts,
KRB5_BACKUP_KPASSWD);
if (krb5_kpasswd_servers == NULL && krb5_backup_kpasswd_servers != NULL) {
DEBUG(SSSDBG_CONF_SETTINGS, ("kpasswd server wasn't specified but "
"backup kpasswd given. Using it as primary\n"));
krb5_kpasswd_servers = krb5_backup_kpasswd_servers;
krb5_backup_kpasswd_servers = NULL;
}
if (krb5_kpasswd_servers == NULL && krb5_servers != NULL) {
DEBUG(0, ("Missing krb5_kpasswd option and KDC set explicitly, "
"will use KDC for pasword change operations!\n"));
ctx->kpasswd_service = NULL;
} else {
ret = krb5_service_init(ctx, bectx,
SSS_KRB5KPASSWD_FO_SRV, krb5_kpasswd_servers,
krb5_backup_kpasswd_servers, krb5_realm,
dp_opt_get_bool(krb5_options->opts,
KRB5_USE_KDCINFO),
&ctx->kpasswd_service);
if (ret != EOK) {
DEBUG(0, ("Failed to init KRB5KPASSWD failover service!\n"));
return ret;
}
}
/* Initialize features needed by the krb5_child */
ret = krb5_child_init(ctx, bectx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
("Could not initialize krb5_child settings: [%s]\n",
strerror(ret)));
goto fail;
}
ctx->illegal_path_re = pcre_compile2(ILLEGAL_PATH_PATTERN, 0,
&errval, &errstr, &errpos, NULL);
if (ctx->illegal_path_re == NULL) {
DEBUG(1, ("Invalid Regular Expression pattern at position %d. "
"(Error: %d [%s])\n", errpos, errval, errstr));
ret = EFAULT;
goto fail;
}
talloc_set_destructor((TALLOC_CTX *) ctx, krb5_ctx_re_destructor);
*ops = &krb5_auth_ops;
*pvt_auth_data = ctx;
return EOK;
fail:
talloc_zfree(krb5_options->auth_ctx);
return ret;
}
int sssm_krb5_chpass_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
}
int sssm_krb5_access_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
}
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