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/**
* @file
* Implementation of the storage class preferences_t.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
* @author Jeremy Solt jsolt@tresys.com
*
* Copyright (C) 2003-2007 Tresys Technology, LLC
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include "preferences.h"
#include <apol/util.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
/** default frequency, in milliseconds, to poll log file for changes */
#define DEFAULT_LOG_UPDATE_INTERVAL 1000
/** maximum number of recent log files and recent policy files to remember */
#define MAX_RECENT_ENTRIES 5
/** name of the user's seaudit personal preferences file */
#define USER_SEAUDIT_CONF ".seaudit"
/** name of the system seaudit preference file */
#define SYSTEM_SEAUDIT_CONF "dot_seaudit"
struct visible_field
{
preference_field_e id;
const char *field;
int visible;
};
static const struct visible_field default_visible_fields[] = {
{HOST_FIELD, "host_field", 1},
{MESSAGE_FIELD, "msg_field", 1},
{DATE_FIELD, "date_field", 1},
{SUSER_FIELD, "src_usr_field", 0},
{SROLE_FIELD, "src_role_field", 0},
{STYPE_FIELD, "src_type_field", 1},
{SMLS_LVL_FIELD, "src_mls_lvl_field", 0},
{SMLS_CLR_FIELD, "src_mls_clr_field", 0},
{TUSER_FIELD, "tgt_usr_field", 0},
{TROLE_FIELD, "tgt_role_field", 0},
{TTYPE_FIELD, "tgt_type_field", 1},
{TMLS_LVL_FIELD, "tgt_mls_lvl_field", 0},
{TMLS_CLR_FIELD, "tgt_mls_clr_field", 0},
{OBJCLASS_FIELD, "obj_class_field", 1},
{PERM_FIELD, "perm_field", 1},
{EXECUTABLE_FIELD, "exe_field", 1},
{COMMAND_FIELD, "comm_field", 1},
{NAME_FIELD, "name_field", 0},
{PID_FIELD, "pid_field", 0},
{INODE_FIELD, "inode_field", 0},
{PATH_FIELD, "path_field", 0},
{OTHER_FIELD, "other_field", 1}
};
static const size_t num_visible_fields = sizeof(default_visible_fields) / sizeof(default_visible_fields[0]);
struct preferences
{
/** path to default system log file */
char *log;
/** path to default policy */
apol_policy_path_t *policy;
/** default path when writing reports */
char *report;
/** default path to the stylesheet, used during report writing */
char *stylesheet;
/** vector of paths (strings) to recently opened log files */
apol_vector_t *recent_log_files;
/** vector of apol_policy_path_t objects to recently opened
policies */
apol_vector_t *recent_policy_files;
/** non-zero if seaudit should poll the log file for changes */
int real_time_log;
/** frequency, in milliesconds, to poll log file */
int real_time_interval;
struct visible_field *fields;
};
void preferences_apol_policy_path_free(void *elem)
{
apol_policy_path_t *path = elem;
apol_policy_path_destroy(&path);
}
/**
* Parse the old-style recent policies list (a ':' separated list of
* paths) into the recent_policy_files field.
*/
static int preferences_parse_old_recent_files(preferences_t * prefs, const char *s)
{
apol_vector_t *v = NULL;
size_t i;
char *base;
apol_policy_path_t *path;
int error = 0;
if ((v = apol_str_split(s, ":")) == NULL) {
error = errno;
goto cleanup;
}
for (i = 0; i < apol_vector_get_size(v); i++) {
base = apol_vector_get_element(v, i);
if ((path = apol_policy_path_create(APOL_POLICY_PATH_TYPE_MONOLITHIC, base, NULL)) == NULL ||
apol_vector_append(prefs->recent_policy_files, path) < 0) {
error = errno;
apol_policy_path_destroy(&path);
goto cleanup;
}
}
cleanup:
apol_vector_destroy(&v);
if (error != 0) {
errno = error;
return -1;
}
return 0;
}
/**
* Parse the new recent policy files, which now spans across multiple
* lines.
*/
static int preferences_parse_new_recent_files(preferences_t * prefs, FILE * f, int num_files)
{
int count;
for (count = 0; count < num_files; count++) {
char *var_name, *value = NULL;
apol_policy_path_t *p = NULL;
if (asprintf(&var_name, "RECENT_POLICY_PATH_%d", count) < 0) {
return -1;
}
value = apol_config_get_var(var_name, f);
free(var_name);
if (value == NULL ||
(p = apol_policy_path_create_from_string(value)) == NULL ||
apol_vector_append(prefs->recent_policy_files, p) < 0) {
free(value);
apol_policy_path_destroy(&p);
return -1;
}
free(value);
}
return 0;
}
preferences_t *preferences_create(void)
{
preferences_t *prefs = NULL;
FILE *file = NULL;
char *path = NULL, *value;
apol_vector_t *v = NULL;
size_t i, j;
int error = 0;
if ((prefs = calloc(1, sizeof(*prefs))) == NULL ||
(prefs->log = strdup("")) == NULL ||
(prefs->report = strdup("")) == NULL ||
(prefs->stylesheet = strdup("")) == NULL ||
(prefs->recent_log_files = apol_vector_create(free)) == NULL ||
(prefs->recent_policy_files = apol_vector_create(preferences_apol_policy_path_free)) == NULL ||
(prefs->fields = calloc(num_visible_fields, sizeof(struct visible_field))) == NULL) {
error = errno;
goto cleanup;
}
prefs->real_time_interval = DEFAULT_LOG_UPDATE_INTERVAL;
memcpy(prefs->fields, default_visible_fields, num_visible_fields * sizeof(struct visible_field));
path = apol_file_find_user_config(USER_SEAUDIT_CONF);
if (!path) {
if ((path = apol_file_find_path(SYSTEM_SEAUDIT_CONF)) == NULL) {
return prefs;
}
}
if ((file = fopen(path, "r")) == NULL) {
error = errno;
goto cleanup;
}
if ((value = apol_config_get_var("DEFAULT_LOG_FILE", file)) != NULL) {
free(prefs->log);
prefs->log = value;
}
if ((value = apol_config_get_var("DEFAULT_POLICY_FILE", file)) != NULL) {
apol_policy_path_destroy(&prefs->policy);
if (apol_policy_path_create(APOL_POLICY_PATH_TYPE_MONOLITHIC, value, NULL) == NULL) {
error = errno;
free(value);
goto cleanup;
}
free(value);
}
if ((value = apol_config_get_var("DEFAULT_POLICY_PATH", file)) != NULL) {
apol_policy_path_destroy(&prefs->policy);
if ((prefs->policy = apol_policy_path_create_from_string(value)) == NULL) {
error = errno;
free(value);
goto cleanup;
}
free(value);
}
if ((value = apol_config_get_var("DEFAULT_REPORT_CONFIG_FILE", file)) != NULL) {
free(prefs->report);
prefs->report = value;
}
if ((value = apol_config_get_var("DEFAULT_REPORT_CSS_FILE", file)) != NULL) {
free(prefs->stylesheet);
prefs->stylesheet = value;
}
if ((value = apol_config_get_var("RECENT_LOG_FILES", file)) == NULL || (v = apol_str_split(value, ":")) == NULL) {
error = errno;
free(value);
goto cleanup;
}
free(value);
apol_vector_destroy(&prefs->recent_log_files);
prefs->recent_log_files = v;
/* test if there exists the new recent list that contains
* module filenames */
if ((value = apol_config_get_var("RECENT_POLICY_PATH_FILES", file)) != NULL) {
if (preferences_parse_new_recent_files(prefs, file, atoi(value)) < 0) {
error = errno;
free(value);
goto cleanup;
}
} else {
/* use older style that could only handle monolithic policies */
if ((value = apol_config_get_var("RECENT_POLICY_FILES", file)) == NULL
|| preferences_parse_old_recent_files(prefs, value) < 0) {
error = errno;
free(value);
goto cleanup;
}
}
free(value);
if ((value = apol_config_get_var("LOG_COLUMNS_HIDDEN", file)) == NULL || (v = apol_str_split(value, ":")) == NULL) {
error = errno;
goto cleanup;
}
for (j = 0; j < num_visible_fields; j++) {
prefs->fields[j].visible = 1;
}
for (i = 0; i < apol_vector_get_size(v); i++) {
char *s = apol_vector_get_element(v, i);
for (j = 0; j < num_visible_fields; j++) {
if (strcmp(s, prefs->fields[j].field) == 0) {
prefs->fields[j].visible = 0;
break;
}
}
}
free(value);
apol_vector_destroy(&v);
value = apol_config_get_var("REAL_TIME_LOG_MONITORING", file);
if (value != NULL && value[0] != '0') {
prefs->real_time_log = 1;
}
free(value);
value = apol_config_get_var("REAL_TIME_LOG_UPDATE_INTERVAL", file);
if (value != NULL) {
prefs->real_time_interval = atoi(value);
}
free(value);
cleanup:
free(path);
if (file != NULL) {
fclose(file);
}
if (error != 0) {
preferences_destroy(&prefs);
errno = error;
return NULL;
}
return prefs;
}
void preferences_destroy(preferences_t ** prefs)
{
if (prefs != NULL && *prefs != NULL) {
free((*prefs)->log);
apol_policy_path_destroy(&(*prefs)->policy);
free((*prefs)->report);
free((*prefs)->stylesheet);
apol_vector_destroy(&(*prefs)->recent_log_files);
apol_vector_destroy(&(*prefs)->recent_policy_files);
free((*prefs)->fields);
free(*prefs);
*prefs = NULL;
}
}
int preferences_write_to_conf_file(preferences_t * prefs)
{
FILE *file = NULL;
char *home, *conf_file = NULL, *value;
apol_vector_t *hidden_fields = NULL;
size_t i;
int retval = 0, error = 0;
/* we need to open ~/.seaudit */
home = getenv("HOME");
if (!home) {
error = EBADRQC;
goto cleanup;
}
if (asprintf(&conf_file, "%s/%s", home, USER_SEAUDIT_CONF) < 0) {
error = errno;
goto cleanup;
}
if ((file = fopen(conf_file, "w")) == NULL) {
error = errno;
goto cleanup;
}
fprintf(file, "# configuration file for seaudit - an audit log tool for Security Enhanced Linux.\n");
fprintf(file, "# this file is auto-generated\n\n");
if (strcmp(prefs->log, "") != 0) {
fprintf(file, "DEFAULT_LOG_FILE %s\n", prefs->log);
}
if (prefs->policy != NULL) {
value = apol_policy_path_to_string(prefs->policy);
if (value == NULL) {
error = errno;
goto cleanup;
}
fprintf(file, "DEFAULT_POLICY_PATH %s\n", value);
free(value);
}
if (strcmp(prefs->report, "") != 0) {
fprintf(file, "DEFAULT_REPORT_CONFIG_FILE %s\n", prefs->report);
}
if (strcmp(prefs->stylesheet, "") != 0) {
fprintf(file, "DEFAULT_REPORT_CSS_FILE %s\n", prefs->stylesheet);
}
if ((value = apol_str_join(prefs->recent_log_files, ":")) == NULL) {
error = errno;
goto cleanup;
}
fprintf(file, "RECENT_LOG_FILES %s\n", value);
free(value);
fprintf(file, "RECENT_POLICY_PATH_FILES %zd\n", apol_vector_get_size(prefs->recent_policy_files));
for (i = 0; i < apol_vector_get_size(prefs->recent_policy_files); i++) {
apol_policy_path_t *p = apol_vector_get_element(prefs->recent_policy_files, i);
if ((value = apol_policy_path_to_string(p)) == NULL) {
error = errno;
goto cleanup;
}
fprintf(file, "RECENT_POLICY_PATH_%zd %s\n", i, value);
free(value);
}
if ((hidden_fields = apol_vector_create(NULL)) == NULL) {
error = errno;
goto cleanup;
}
for (i = 0; i < num_visible_fields; i++) {
if (!prefs->fields[i].visible && apol_vector_append(hidden_fields, (char *)prefs->fields[i].field) < 0) {
error = errno;
goto cleanup;
}
}
if ((value = apol_str_join(hidden_fields, ":")) == NULL) {
error = errno;
goto cleanup;
}
fprintf(file, "LOG_COLUMNS_HIDDEN %s\n", value);
free(value);
fprintf(file, "REAL_TIME_LOG_MONITORING %d\n", prefs->real_time_log);
fprintf(file, "REAL_TIME_LOG_UPDATE_INTERVAL %d\n", prefs->real_time_interval);
retval = 0;
cleanup:
free(conf_file);
apol_vector_destroy(&hidden_fields);
if (file != NULL) {
fclose(file);
}
errno = error;
return retval;
}
int preferences_is_column_visible(preferences_t * prefs, preference_field_e id)
{
size_t i;
for (i = 0; i < num_visible_fields; i++) {
if (prefs->fields[i].id == id) {
return prefs->fields[i].visible;
}
}
assert(0);
return -1;
}
void preferences_set_column_visible(preferences_t * prefs, preference_field_e id, int visible)
{
size_t i;
for (i = 0; i < num_visible_fields; i++) {
if (prefs->fields[i].id == id) {
prefs->fields[i].visible = visible;
return;
}
}
assert(0);
}
int preferences_set_log(preferences_t * prefs, const char *log)
{
char *s;
if ((s = strdup(log)) == NULL) {
return -1;
}
free(prefs->log);
prefs->log = s;
return 0;
}
const char *preferences_get_log(preferences_t * prefs)
{
return prefs->log;
}
int preferences_set_policy(preferences_t * prefs, const apol_policy_path_t * policy)
{
apol_policy_path_t *new_policy;
if ((new_policy = apol_policy_path_create_from_policy_path(policy)) == NULL) {
return -1;
}
apol_policy_path_destroy(&prefs->policy);
prefs->policy = new_policy;
return 0;
}
const apol_policy_path_t *preferences_get_policy(preferences_t * prefs)
{
return prefs->policy;
}
int preferences_set_report(preferences_t * prefs, const char *report)
{
char *s;
if ((s = strdup(report)) == NULL) {
return -1;
}
free(prefs->report);
prefs->report = s;
return 0;
}
const char *preferences_get_report(preferences_t * prefs)
{
return prefs->report;
}
int preferences_set_stylesheet(preferences_t * prefs, const char *stylesheet)
{
char *s;
if ((s = strdup(stylesheet)) == NULL) {
return -1;
}
free(prefs->stylesheet);
prefs->stylesheet = s;
return 0;
}
const char *preferences_get_stylesheet(preferences_t * prefs)
{
return prefs->stylesheet;
}
void preferences_set_real_time_at_startup(preferences_t * prefs, int startup)
{
prefs->real_time_log = startup;
}
int preferences_get_real_time_at_startup(preferences_t * prefs)
{
return prefs->real_time_log;
}
void preferences_set_real_time_interval(preferences_t * prefs, int interval)
{
if (interval <= 0) {
prefs->real_time_interval = 0;
} else {
prefs->real_time_interval = interval;
}
}
int preferences_get_real_time_interval(preferences_t * prefs)
{
return prefs->real_time_interval;
}
/**
* Add an entry to a vector, discarding the oldest entry if the vector
* size is too large.
*/
static int prefs_add_recent_vector(apol_vector_t * v, const char *entry)
{
size_t i;
char *s;
if (apol_vector_get_index(v, (void *)entry, apol_str_strcmp, NULL, &i) == 0) {
return 0;
}
if ((s = strdup(entry)) == NULL || apol_vector_append(v, s) < 0) {
int error = errno;
free(s);
errno = error;
return -1;
}
if (apol_vector_get_size(v) >= MAX_RECENT_ENTRIES) {
s = apol_vector_get_element(v, 0);
free(s);
return apol_vector_remove(v, 0);
}
return 0;
}
int preferences_add_recent_log(preferences_t * prefs, const char *log)
{
return prefs_add_recent_vector(prefs->recent_log_files, log);
}
apol_vector_t *preferences_get_recent_logs(preferences_t * prefs)
{
return prefs->recent_log_files;
}
static int preferences_policy_path_compare(const void *a, const void *b, void *data __attribute__ ((unused)))
{
return apol_policy_path_compare((const apol_policy_path_t *)a, (const apol_policy_path_t *)b);
}
int preferences_add_recent_policy(preferences_t * prefs, const apol_policy_path_t * policy)
{
size_t i;
apol_policy_path_t *p = NULL;
if (apol_vector_get_index(prefs->recent_policy_files, policy, preferences_policy_path_compare, NULL, &i) == 0) {
return 0;
}
if ((p = apol_policy_path_create_from_policy_path(policy)) == NULL || apol_vector_append(prefs->recent_policy_files, p) < 0) {
int error = errno;
apol_policy_path_destroy(&p);
errno = error;
return -1;
}
if (apol_vector_get_size(prefs->recent_policy_files) >= MAX_RECENT_ENTRIES) {
p = apol_vector_get_element(prefs->recent_policy_files, 0);
apol_policy_path_destroy(&p);
return apol_vector_remove(prefs->recent_policy_files, 0);
}
return 0;
}
apol_vector_t *preferences_get_recent_policies(preferences_t * prefs)
{
return prefs->recent_policy_files;
}
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