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/**
* @file
* Defines the public interface the QPol policy.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
* @author Brandon Whalen bwhalen@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 <config.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <qpol/module.h>
#include <qpol/util.h>
#include "qpol_internal.h"
#include <sepol/policydb.h>
#include <sepol/policydb/module.h>
int qpol_module_create_from_file(const char *path, qpol_module_t ** module)
{
sepol_module_package_t *smp = NULL;
sepol_policy_file_t *spf = NULL;
FILE *infile = NULL;
int error = 0;
char *tmp = NULL;
char *data = NULL;
ssize_t size;
if (module)
*module = NULL;
if (!path || !module) {
errno = EINVAL;
return STATUS_ERR;
}
if (!(*module = calloc(1, sizeof(qpol_module_t)))) {
return STATUS_ERR;
}
if (!((*module)->path = strdup(path))) {
error = errno;
goto err;
}
if (sepol_policy_file_create(&spf)) {
error = errno;
goto err;
}
infile = fopen(path, "rb");
if (!infile) {
error = errno;
goto err;
}
size = qpol_bunzip(infile, &data);
if (size > 0) {
if (!qpol_is_data_mod_pkg(data)) {
error = ENOTSUP;
goto err;
}
sepol_policy_file_set_mem(spf, data, size);
} else {
if (!qpol_is_file_mod_pkg(infile)) {
error = ENOTSUP;
goto err;
}
rewind(infile);
sepol_policy_file_set_fp(spf, infile);
}
if (sepol_module_package_create(&smp)) {
error = EIO;
goto err;
}
if (sepol_module_package_info(spf, &((*module)->type), &((*module)->name), &tmp)) {
error = EIO;
goto err;
}
free(tmp);
tmp = NULL;
if (size > 0) {
// Re setting the memory location has the effect of rewind
// API is not accessible from here to explicitly "rewind" the
// in-memory file.
sepol_policy_file_set_mem(spf, data, size);
} else {
rewind(infile);
}
if (sepol_module_package_read(smp, spf, 0)) {
error = EIO;
goto err;
}
if (!((*module)->p = sepol_module_package_get_policy(smp))) {
error = EIO;
goto err;
}
/* set the module package's policy to NULL as the qpol module owns it now */
smp->policy = NULL;
(*module)->version = (*module)->p->p.version;
(*module)->enabled = 1;
sepol_module_package_free(smp);
fclose(infile);
if (data != NULL)
free (data);
sepol_policy_file_free(spf);
return STATUS_SUCCESS;
err:
qpol_module_destroy(module);
sepol_policy_file_free(spf);
sepol_module_package_free(smp);
if (infile)
fclose(infile);
if (data != NULL)
free (data);
if (tmp != NULL)
free(tmp);
errno = error;
return STATUS_ERR;
}
void qpol_module_destroy(qpol_module_t ** module)
{
if (!module || !(*module))
return;
free((*module)->path);
free((*module)->name);
sepol_policydb_free((*module)->p);
free(*module);
*module = NULL;
}
int qpol_module_get_path(const qpol_module_t * module, const char **path)
{
if (!module || !path) {
errno = EINVAL;
return STATUS_ERR;
}
*path = module->path;
return STATUS_SUCCESS;
}
int qpol_module_get_name(const qpol_module_t * module, const char **name)
{
if (!module || !name) {
errno = EINVAL;
return STATUS_ERR;
}
*name = module->name;
return STATUS_SUCCESS;
}
int qpol_module_get_version(const qpol_module_t * module, const char **version)
{
if (!module || !version) {
errno = EINVAL;
return STATUS_ERR;
}
*version = module->version;
return STATUS_SUCCESS;
}
int qpol_module_get_type(const qpol_module_t * module, int *type)
{
if (!module || !type) {
errno = EINVAL;
return STATUS_ERR;
}
*type = module->type;
return STATUS_SUCCESS;
}
int qpol_module_get_enabled(const qpol_module_t * module, int *enabled)
{
if (!module || !enabled) {
errno = EINVAL;
return STATUS_ERR;
}
*enabled = module->enabled;
return STATUS_SUCCESS;
}
int qpol_module_set_enabled(qpol_module_t * module, int enabled)
{
if (!module) {
errno = EINVAL;
return STATUS_ERR;
}
if (enabled != module->enabled && module->parent) {
module->parent->modified = 1;
}
module->enabled = enabled;
return STATUS_SUCCESS;
}
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