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/**
* @file
*
* Provides a way for setools to make queries about roles 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_role_query
{
char *role_name, *type_name;
unsigned int flags;
regex_t *role_regex, *type_regex;
};
/******************** role queries ********************/
int apol_role_get_by_query(const apol_policy_t * p, apol_role_query_t * r, apol_vector_t ** v)
{
qpol_iterator_t *iter = NULL, *type_iter = NULL;
int retval = -1, append_role;
*v = NULL;
if (qpol_policy_get_role_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_role_t *role;
if (qpol_iterator_get_item(iter, (void **)&role) < 0) {
goto cleanup;
}
append_role = 1;
if (r != NULL) {
const char *role_name;
int compval;
if (qpol_role_get_name(p->p, role, &role_name) < 0) {
goto cleanup;
}
compval = apol_compare(p, role_name, r->role_name, r->flags, &(r->role_regex));
if (compval < 0) {
goto cleanup;
} else if (compval == 0) {
continue;
}
if (r->type_name == NULL || r->type_name[0] == '\0') {
goto end_of_query;
}
if (qpol_role_get_type_iter(p->p, role, &type_iter) < 0) {
goto cleanup;
}
append_role = 0;
for (; !qpol_iterator_end(type_iter); qpol_iterator_next(type_iter)) {
qpol_type_t *type;
if (qpol_iterator_get_item(type_iter, (void **)&type) < 0) {
goto cleanup;
}
compval = apol_compare_type(p, type, r->type_name, r->flags, &(r->type_regex));
if (compval < 0) {
goto cleanup;
} else if (compval == 1) {
append_role = 1;
break;
}
}
qpol_iterator_destroy(&type_iter);
}
end_of_query:
if (append_role && apol_vector_append(*v, role)) {
ERR(p, "%s", strerror(ENOMEM));
goto cleanup;
}
}
retval = 0;
cleanup:
if (retval != 0) {
apol_vector_destroy(v);
}
qpol_iterator_destroy(&iter);
qpol_iterator_destroy(&type_iter);
return retval;
}
apol_role_query_t *apol_role_query_create(void)
{
return calloc(1, sizeof(apol_role_query_t));
}
void apol_role_query_destroy(apol_role_query_t ** r)
{
if (*r != NULL) {
free((*r)->role_name);
free((*r)->type_name);
apol_regex_destroy(&(*r)->role_regex);
apol_regex_destroy(&(*r)->type_regex);
free(*r);
*r = NULL;
}
}
int apol_role_query_set_role(const apol_policy_t * p, apol_role_query_t * r, const char *name)
{
return apol_query_set(p, &r->role_name, &r->role_regex, name);
}
int apol_role_query_set_type(const apol_policy_t * p, apol_role_query_t * r, const char *name)
{
return apol_query_set(p, &r->type_name, &r->type_regex, name);
}
int apol_role_query_set_regex(const apol_policy_t * p, apol_role_query_t * r, int is_regex)
{
return apol_query_set_regex(p, &r->flags, is_regex);
}
int apol_role_has_type(const apol_policy_t * p, const qpol_role_t * r, const qpol_type_t * t)
{
qpol_iterator_t *iter = NULL;
qpol_type_t *tmp_type;
uint32_t type_value, t_type_value;
int retval = -1;
if (qpol_type_get_value(p->p, t, &t_type_value) < 0 || qpol_role_get_type_iter(p->p, r, &iter) < 0) {
goto cleanup;
}
for (; !qpol_iterator_end(iter); qpol_iterator_next(iter)) {
qpol_iterator_get_item(iter, (void **)(&tmp_type));
qpol_type_get_value(p->p, tmp_type, &type_value);
if (t_type_value == type_value) {
retval = 1;
goto cleanup;
}
}
retval = 0;
cleanup:
qpol_iterator_destroy(&iter);
return retval;
}
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