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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2023 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 "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <jansson.h>
#include <krb5/preauth_plugin.h>
#include "krb5_plugin/common/utils.h"
void
sss_string_array_free(char **array)
{
size_t i;
if (array == NULL) {
return;
}
for (i = 0; array[i] != NULL; i++) {
free(array[i]);
}
free(array);
}
char **
sss_string_array_copy(char **array)
{
char **copy;
size_t i;
for (i = 0; array[i] != NULL; i++) {
/* Just count. */
}
copy = calloc(i + 1, sizeof(char *));
if (copy == NULL) {
return NULL;
}
for (i = 0; array[i] != NULL; i++) {
copy[i] = strdup(array[i]);
if (copy[i] == NULL) {
sss_string_array_free(copy);
return NULL;
}
}
copy[i] = NULL;
return copy;
}
char **
sss_json_array_to_strings(json_t *jarray)
{
const char *strval;
char **array;
json_t *jval;
size_t i;
if (!json_is_array(jarray)) {
return NULL;
}
array = calloc(json_array_size(jarray) + 1, sizeof(char *));
if (array == NULL) {
return NULL;
}
json_array_foreach(jarray, i, jval) {
strval = json_string_value(jval);
if (strval == NULL) {
goto fail;
}
array[i] = strdup(strval);
if (array[i] == NULL) {
goto fail;
}
}
return array;
fail:
sss_string_array_free(array);
return NULL;
}
json_t *
sss_strings_to_json_array(char **array)
{
json_t *jarray;
json_t *jstr;
size_t i;
int jret;
jarray = json_array();
if (jarray == NULL) {
return NULL;
}
if (array == NULL) {
return jarray;
}
for (i = 0; array[i] != NULL; i++) {
jstr = json_string(array[i]);
if (jstr == NULL) {
goto fail;
}
jret = json_array_append_new(jarray, jstr);
if (jret != 0) {
goto fail;
}
}
return jarray;
fail:
json_decref(jarray);
return NULL;
}
void *
sss_radius_message_decode(const char *prefix,
sss_radius_message_decode_fn fn,
const char *str)
{
size_t prefix_len;
if (str == NULL) {
return NULL;
}
prefix_len = strlen(prefix);
if (strncmp(str, prefix, prefix_len) != 0) {
return NULL;
}
return fn(str + prefix_len);
}
char *
sss_radius_message_encode(const char *prefix,
sss_radius_message_encode_fn fn,
const void *data)
{
char *json_str;
char *str;
int aret;
json_str = fn(data);
if (json_str == NULL) {
return NULL;
}
aret = asprintf(&str, "%s%s", prefix, json_str);
free(json_str);
if (aret < 0) {
return NULL;
}
return str;
}
krb5_pa_data *
sss_radius_encode_padata(krb5_preauthtype patype,
sss_radius_message_encode_fn fn,
const void *data)
{
krb5_pa_data *padata;
char *str;
str = fn(data);
if (str == NULL) {
return NULL;
}
padata = malloc(sizeof(krb5_pa_data));
if (padata == NULL) {
free(str);
return NULL;
}
padata->pa_type = patype;
padata->contents = (krb5_octet*)str;
padata->length = strlen(str) + 1;
return padata;
}
void *
sss_radius_decode_padata(sss_radius_message_decode_fn fn,
krb5_pa_data *padata)
{
if (padata->length == 0 || padata->contents == NULL) {
return NULL;
}
/* contents is NULL terminated string */
if (padata->contents[padata->length - 1] != '\0') {
return NULL;
}
return fn((const char*)padata->contents);
}
krb5_pa_data **
sss_radius_encode_padata_array(krb5_preauthtype patype,
sss_radius_message_encode_fn fn,
const void *data)
{
krb5_pa_data **array;
array = calloc(2, sizeof(krb5_pa_data *));
if (array == NULL) {
return NULL;
}
array[0] = sss_radius_encode_padata(patype, fn, data);
array[1] = NULL;
if (array[0] == NULL) {
free(array);
return NULL;
}
return array;
}
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