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/**
* @file
*
* Provides a way for setools to make queries about users within a
* policy. The caller obtains a query object, fills in its
* parameters, and then runs the query; it obtains a vector of
* results. Searches are conjunctive -- all fields of the search
* query must match for a datum to be added to the results query.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2006-2007 Tresys Technology, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "policy-query-internal.h"
#include <errno.h>
struct apol_user_query
{
char *user_name, *role_name;
apol_mls_level_t *default_level;
apol_mls_range_t *range;
unsigned int flags;
regex_t *user_regex, *role_regex;
};
/******************** user queries ********************/
int apol_user_get_by_query(const apol_policy_t * p, apol_user_query_t * u, apol_vector_t ** v)
{
qpol_iterator_t *iter = NULL, *role_iter = NULL;
apol_mls_level_t *default_level = NULL;
apol_mls_range_t *range = NULL;
int retval = -1, append_user;
*v = NULL;
if (qpol_policy_get_user_iter(p->p, &iter) < 0) {
return -1;
}
if ((*v = apol_vector_create(NULL)) == NULL) {
ERR(p, "%s", strerror(errno));
goto cleanup;
}
for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) {
qpol_user_t *user;
if (qpol_iterator_get_item(iter, (void **)&user) < 0) {
goto cleanup;
}
append_user = 1;
if (u != NULL) {
const char *user_name;
int compval;
const qpol_mls_level_t *mls_default_level;
const qpol_mls_range_t *mls_range;
qpol_iterator_destroy(&role_iter);
apol_mls_level_destroy(&default_level);
apol_mls_range_destroy(&range);
if (qpol_user_get_name(p->p, user, &user_name) < 0) {
goto cleanup;
}
compval = apol_compare(p, user_name, u->user_name, u->flags, &(u->user_regex));
if (compval < 0) {
goto cleanup;
} else if (compval == 0) {
continue;
}
if (qpol_user_get_role_iter(p->p, user, &role_iter) < 0) {
goto cleanup;
}
if (u->role_name != NULL && u->role_name[0] != '\0') {
append_user = 0;
for (; !qpol_iterator_end(role_iter); qpol_iterator_next(role_iter)) {
qpol_role_t *role;
const char *role_name;
if (qpol_iterator_get_item(role_iter, (void **)&role) < 0 ||
qpol_role_get_name(p->p, role, &role_name) < 0) {
goto cleanup;
}
compval = apol_compare(p, role_name, u->role_name, u->flags, &(u->role_regex));
if (compval < 0) {
goto cleanup;
} else if (compval == 1) {
append_user = 1;
break;
}
}
}
if (apol_policy_is_mls(p)) {
if (qpol_user_get_dfltlevel(p->p, user, &mls_default_level) < 0 ||
(default_level = apol_mls_level_create_from_qpol_mls_level(p, mls_default_level)) == NULL) {
goto cleanup;
}
compval = apol_mls_level_compare(p, default_level, u->default_level);
apol_mls_level_destroy(&default_level);
if (compval < 0) {
goto cleanup;
} else if (compval != APOL_MLS_EQ) {
continue;
}
if (qpol_user_get_range(p->p, user, &mls_range) < 0 ||
(range = apol_mls_range_create_from_qpol_mls_range(p, mls_range)) == NULL) {
goto cleanup;
}
compval = apol_mls_range_compare(p, range, u->range, u->flags);
apol_mls_range_destroy(&range);
if (compval < 0) {
goto cleanup;
} else if (compval == 0) {
continue;
}
}
}
if (append_user && apol_vector_append(*v, user)) {
ERR(p, "%s", strerror(ENOMEM));
goto cleanup;
}
}
retval = 0;
cleanup:
if (retval != 0) {
apol_vector_destroy(v);
}
qpol_iterator_destroy(&iter);
qpol_iterator_destroy(&role_iter);
apol_mls_level_destroy(&default_level);
apol_mls_range_destroy(&range);
return retval;
}
apol_user_query_t *apol_user_query_create(void)
{
return calloc(1, sizeof(apol_user_query_t));
}
void apol_user_query_destroy(apol_user_query_t ** u)
{
if (*u != NULL) {
free((*u)->user_name);
free((*u)->role_name);
apol_mls_level_destroy(&((*u)->default_level));
apol_mls_range_destroy(&((*u)->range));
apol_regex_destroy(&(*u)->user_regex);
apol_regex_destroy(&(*u)->role_regex);
free(*u);
*u = NULL;
}
}
int apol_user_query_set_user(const apol_policy_t * p, apol_user_query_t * u, const char *name)
{
return apol_query_set(p, &u->user_name, &u->user_regex, name);
}
int apol_user_query_set_role(const apol_policy_t * p, apol_user_query_t * u, const char *role)
{
return apol_query_set(p, &u->role_name, &u->role_regex, role);
}
int apol_user_query_set_default_level(const apol_policy_t * p
__attribute__ ((unused)), apol_user_query_t * u, apol_mls_level_t * level)
{
u->default_level = level;
return 0;
}
int apol_user_query_set_range(const apol_policy_t * p __attribute__ ((unused)),
apol_user_query_t * u, apol_mls_range_t * range, unsigned int range_match)
{
if (u->range != NULL) {
apol_mls_range_destroy(&u->range);
}
u->range = range;
u->flags = (u->flags & ~APOL_QUERY_FLAGS) | range_match;
return 0;
}
int apol_user_query_set_regex(const apol_policy_t * p, apol_user_query_t * u, int is_regex)
{
return apol_query_set_regex(p, &u->flags, is_regex);
}
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