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/*
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2012 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 <utime.h>
#include "confdb/confdb.h"
#include "db/sysdb.h"
#include "util/util.h"
/* the directory domain - realm mappings are written to */
#define KRB5_MAPPING_DIR PUBCONF_PATH"/krb5.include.d"
struct sss_domain_info *get_next_domain(struct sss_domain_info *domain,
bool descend)
{
struct sss_domain_info *dom;
dom = domain;
while (dom) {
if (descend && dom->subdomains) {
dom = dom->subdomains;
} else if (dom->next) {
dom = dom->next;
} else if (descend && IS_SUBDOMAIN(dom) && dom->parent->next) {
dom = dom->parent->next;
} else {
dom = NULL;
}
if (dom && !dom->disabled) break;
}
return dom;
}
bool subdomain_enumerates(struct sss_domain_info *parent,
const char *sd_name)
{
if (parent->sd_enumerate == NULL
|| parent->sd_enumerate[0] == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Subdomain_enumerate not set\n"));
return false;
}
if (strcasecmp(parent->sd_enumerate[0], "all") == 0) {
return true;
} else if (strcasecmp(parent->sd_enumerate[0], "none") == 0) {
return false;
} else {
for (int i=0; parent->sd_enumerate[i]; i++) {
if (strcasecmp(parent->sd_enumerate[i], sd_name) == 0) {
return true;
}
}
}
return false;
}
struct sss_domain_info *find_subdomain_by_name(struct sss_domain_info *domain,
const char *name,
bool match_any)
{
struct sss_domain_info *dom = domain;
while (dom && dom->disabled) {
dom = get_next_domain(dom, true);
}
while (dom) {
if (strcasecmp(dom->name, name) == 0 ||
((match_any == true) && (dom->flat_name != NULL) &&
(strcasecmp(dom->flat_name, name) == 0))) {
return dom;
}
dom = get_next_domain(dom, true);
}
return NULL;
}
struct sss_domain_info *new_subdomain(TALLOC_CTX *mem_ctx,
struct sss_domain_info *parent,
const char *name,
const char *realm,
const char *flat_name,
const char *id,
bool mpg,
bool enumerate)
{
struct sss_domain_info *dom;
DEBUG(SSSDBG_TRACE_FUNC,
("Creating [%s] as subdomain of [%s]!\n", name, parent->name));
dom = talloc_zero(mem_ctx, struct sss_domain_info);
if (dom == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("talloc_zero failed.\n"));
return NULL;
}
dom->parent = parent;
dom->name = talloc_strdup(dom, name);
if (dom->name == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy domain name.\n"));
goto fail;
}
dom->provider = talloc_strdup(dom, parent->provider);
if (dom->provider == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy provider name.\n"));
goto fail;
}
dom->conn_name = talloc_strdup(dom, parent->conn_name);
if (dom->conn_name == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy connection name.\n"));
goto fail;
}
if (realm != NULL) {
dom->realm = talloc_strdup(dom, realm);
if (dom->realm == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy realm name.\n"));
goto fail;
}
}
if (flat_name != NULL) {
dom->flat_name = talloc_strdup(dom, flat_name);
if (dom->flat_name == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy flat name.\n"));
goto fail;
}
}
if (id != NULL) {
dom->domain_id = talloc_strdup(dom, id);
if (dom->domain_id == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to copy id.\n"));
goto fail;
}
}
dom->enumerate = enumerate;
dom->fqnames = true;
dom->mpg = mpg;
/* FIXME: get ranges from the server */
dom->id_min = 0;
dom->id_max = 0xffffffff;
dom->pwd_expiration_warning = parent->pwd_expiration_warning;
dom->cache_credentials = parent->cache_credentials;
dom->case_sensitive = false;
dom->user_timeout = parent->user_timeout;
dom->group_timeout = parent->group_timeout;
dom->netgroup_timeout = parent->netgroup_timeout;
dom->service_timeout = parent->service_timeout;
dom->override_homedir = parent->override_homedir;
dom->names = parent->names;
dom->subdomain_homedir = parent->subdomain_homedir;
if (parent->sysdb == NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Missing sysdb context in parent domain.\n"));
goto fail;
}
dom->sysdb = parent->sysdb;
return dom;
fail:
talloc_free(dom);
return NULL;
}
errno_t sssd_domain_init(TALLOC_CTX *mem_ctx,
struct confdb_ctx *cdb,
const char *domain_name,
const char *db_path,
struct sss_domain_info **_domain)
{
int ret;
struct sss_domain_info *dom;
struct sysdb_ctx *sysdb;
ret = confdb_get_domain(cdb, domain_name, &dom);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("Error retrieving domain configuration.\n"));
return ret;
}
if (dom->sysdb != NULL) {
DEBUG(SSSDBG_OP_FAILURE, ("Sysdb context already initialized.\n"));
return EEXIST;
}
ret = sysdb_domain_init(mem_ctx, dom, db_path, &sysdb);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("Error opening cache database.\n"));
return ret;
}
dom->sysdb = talloc_steal(dom, sysdb);
*_domain = dom;
return EOK;
}
static errno_t
sss_krb5_touch_config(void)
{
const char *config = NULL;
errno_t ret;
config = getenv("KRB5_CONFIG");
if (config == NULL) {
config = KRB5_CONF_PATH;
}
ret = utime(config, NULL);
if (ret == -1) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to change mtime of \"%s\" "
"[%d]: %s\n", config, ret, strerror(ret)));
return ret;
}
return EOK;
}
errno_t
sss_write_domain_mappings(struct sss_domain_info *domain)
{
struct sss_domain_info *dom;
errno_t ret;
errno_t err;
TALLOC_CTX *tmp_ctx;
const char *mapping_file;
char *sanitized_domain;
char *tmp_file = NULL;
int fd = -1;
mode_t old_mode;
FILE *fstream = NULL;
int i;
if (domain == NULL || domain->name == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("No domain name provided\n"));
return EINVAL;
}
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return ENOMEM;
sanitized_domain = talloc_strdup(tmp_ctx, domain->name);
if (sanitized_domain == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_strdup() failed\n"));
return ENOMEM;
}
/* only alpha-numeric chars, dashes and underscores are allowed in
* krb5 include directory */
for (i = 0; sanitized_domain[i] != '\0'; i++) {
if (!isalnum(sanitized_domain[i])
&& sanitized_domain[i] != '-' && sanitized_domain[i] != '_') {
sanitized_domain[i] = '_';
}
}
mapping_file = talloc_asprintf(tmp_ctx, "%s/domain_realm_%s",
KRB5_MAPPING_DIR, sanitized_domain);
if (!mapping_file) {
ret = ENOMEM;
goto done;
}
DEBUG(SSSDBG_FUNC_DATA, ("Mapping file for domain [%s] is [%s]\n",
domain->name, mapping_file));
tmp_file = talloc_asprintf(tmp_ctx, "%sXXXXXX", mapping_file);
if (tmp_file == NULL) {
ret = ENOMEM;
goto done;
}
old_mode = umask(077);
fd = mkstemp(tmp_file);
umask(old_mode);
if (fd < 0) {
DEBUG(SSSDBG_OP_FAILURE, ("creating the temp file [%s] for domain-realm "
"mappings failed.", tmp_file));
ret = EIO;
talloc_zfree(tmp_ctx);
goto done;
}
fstream = fdopen(fd, "a");
if (!fstream) {
ret = errno;
DEBUG(SSSDBG_OP_FAILURE, ("fdopen failed [%d]: %s\n",
ret, strerror(ret)));
ret = close(fd);
if (ret != 0) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE,
("fclose failed [%d][%s].\n", ret, strerror(ret)));
/* Nothing to do here, just report the failure */
}
ret = EIO;
goto done;
}
ret = fprintf(fstream, "[domain_realm]\n");
if (ret < 0) {
DEBUG(SSSDBG_OP_FAILURE, ("fprintf failed\n"));
ret = EIO;
goto done;
}
for (dom = get_next_domain(domain, true);
dom && IS_SUBDOMAIN(dom); /* if we get back to a parent, stop */
dom = get_next_domain(dom, false)) {
ret = fprintf(fstream, ".%s = %s\n%s = %s\n",
dom->name, dom->realm, dom->name, dom->realm);
if (ret < 0) {
DEBUG(SSSDBG_CRIT_FAILURE, ("fprintf failed\n"));
goto done;
}
}
ret = fclose(fstream);
fstream = NULL;
if (ret != 0) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE,
("fclose failed [%d][%s].\n", ret, strerror(ret)));
goto done;
}
ret = rename(tmp_file, mapping_file);
if (ret == -1) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE,
("rename failed [%d][%s].\n", ret, strerror(ret)));
goto done;
}
talloc_zfree(tmp_file);
ret = chmod(mapping_file, 0644);
if (ret == -1) {
ret = errno;
DEBUG(SSSDBG_CRIT_FAILURE,
("fchmod failed [%d][%s].\n", ret, strerror(ret)));
goto done;
}
ret = EOK;
done:
err = sss_krb5_touch_config();
if (err != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to change last modification time "
"of krb5.conf. Created mappings may not be loaded.\n"));
/* Ignore */
}
if (fstream) {
err = fclose(fstream);
if (err != 0) {
err = errno;
DEBUG(SSSDBG_CRIT_FAILURE,
("fclose failed [%d][%s].\n", err, strerror(err)));
/* Nothing to do here, just report the failure */
}
}
if (tmp_file) {
err = unlink(tmp_file);
if (err < 0) {
err = errno;
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not remove file [%s]: [%d]: %s",
tmp_file, err, strerror(err)));
}
}
talloc_free(tmp_ctx);
return ret;
}
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