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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Monkey HTTP Server
* ==================
* Copyright 2001-2017 Eduardo Silva <eduardo@monkey.io>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <monkey/mk_api.h>
#include "base64.h"
#include "auth.h"
#include "conf.h"
/*
* Register a users file into the main list, if the users
* file already exists it just return the node in question,
* otherwise add the node to the list and return the node
* created.
*/
static struct users_file *mk_auth_conf_add_users(char *users_path)
{
struct file_info finfo;
struct mk_list *head;
struct users_file *entry;
struct user *cred;
int i, sep, len;
int offset = 0;
size_t decoded_len;
char *buf;
mk_list_foreach(head, &users_file_list) {
entry = mk_list_entry(head, struct users_file, _head);
if (strcmp(entry->path, users_path) == 0) {
return entry;
}
}
if (mk_api->file_get_info(users_path, &finfo, MK_FILE_READ) != 0) {
mk_warn("Auth: Invalid users file '%s'", users_path);
return NULL;
}
if (finfo.is_directory == MK_TRUE) {
mk_warn("Auth: Not a credentials file '%s'", users_path);
return NULL;
}
if (finfo.read_access == MK_FALSE) {
mk_warn("Auth: Could not read file '%s'", users_path);
return NULL;
}
/* We did not find the path in our list, let's create a new node */
entry = mk_api->mem_alloc(sizeof(struct users_file));
entry->last_updated = finfo.last_modification;
entry->path = users_path;
/* Read file and add users to the list */
mk_list_init(&entry->_users);
/* Read credentials file */
buf = mk_api->file_to_buffer(users_path);
if (!buf) {
mk_warn("Auth: No users loaded '%s'", users_path);
return NULL;
}
/* Read users list buffer lines */
len = strlen(buf);
for (i = 0; i < len; i++) {
if (buf[i] == '\n' || (i) == len -1) {
sep = mk_api->str_search(buf + offset, ":", 1);
if (sep >= (int)sizeof(cred->user)) {
mk_warn("Auth: username too long");
offset = i + 1;
continue;
}
if (i - offset - sep - 1 - 5 >= (int)sizeof(cred->passwd_raw)) {
mk_warn("Auth: password hash too long");
offset = i + 1;
continue;
}
cred = mk_api->mem_alloc(sizeof(struct user));
/* Copy username */
strncpy(cred->user, buf + offset, sep);
cred->user[sep] = '\0';
/* Copy raw password */
offset += sep + 1 + 5;
strncpy(cred->passwd_raw,
buf + offset,
i - (offset));
cred->passwd_raw[i - offset] = '\0';
/* Decode raw password */
cred->passwd_decoded = base64_decode((unsigned char *)(cred->passwd_raw),
strlen(cred->passwd_raw),
&decoded_len);
offset = i + 1;
if (!cred->passwd_decoded) {
mk_warn("Auth: invalid user '%s' in '%s'",
cred->user, users_path);
mk_api->mem_free(cred);
continue;
}
mk_list_add(&cred->_head, &entry->_users);
}
}
mk_api->mem_free(buf);
/* Link node to global list */
mk_list_add(&entry->_head, &users_file_list);
return entry;
}
/*
* Read all vhost configuration nodes and looks for users files under an [AUTH]
* section, if present, it add that file to the unique list. It parse all user's
* files mentioned to avoid duplicated lists in memory.
*/
int mk_auth_conf_init_users_list()
{
/* Section data */
char *location;
char *title;
char *users_path;
/* auth vhost list */
struct vhost *auth_vhost;
/* vhost configuration */
struct mk_list *head_hosts;
struct mk_list *hosts = &mk_api->config->hosts;
struct mk_list *head_sections;
struct mk_vhost *entry_host;
struct mk_rconf_section *section;
/* vhost [AUTH] locations */
struct location *loc;
/* User files list */
struct users_file *uf;
PLUGIN_TRACE("Loading user's files");
mk_list_foreach(head_hosts, hosts) {
entry_host = mk_list_entry(head_hosts, struct mk_vhost, _head);
if (!entry_host->config) {
continue;
}
auth_vhost = mk_api->mem_alloc(sizeof(struct vhost));
auth_vhost->host = entry_host; /* link virtual host entry */
mk_list_init(&auth_vhost->locations); /* init locations list */
/*
* check vhost 'config' and look for [AUTH] sections, we don't use
* mk_config_section_get() because we can have multiple [AUTH]
* sections.
*/
mk_list_foreach(head_sections, &entry_host->config->sections) {
section = mk_list_entry(head_sections, struct mk_rconf_section, _head);
if (strcasecmp(section->name, "AUTH") == 0) {
location = NULL;
title = NULL;
users_path = NULL;
/* Get section keys */
location = mk_api->config_section_get_key(section,
"Location",
MK_RCONF_STR);
title = mk_api->config_section_get_key(section,
"Title",
MK_RCONF_STR);
users_path = mk_api->config_section_get_key(section,
"Users",
MK_RCONF_STR);
/* get or create users file entry */
uf = mk_auth_conf_add_users(users_path);
if (!uf) {
continue;
}
/* Location node */
loc = mk_api->mem_alloc(sizeof(struct location));
mk_api->pointer_set(&loc->path, location);
mk_api->pointer_set(&loc->title, title);
loc->auth_http_header.data = NULL;
mk_api->str_build(&loc->auth_http_header.data,
&loc->auth_http_header.len,
MK_AUTH_HEADER_TITLE, title);
loc->users = uf;
/* Add new location to auth_vhost node */
mk_list_add(&loc->_head, &auth_vhost->locations);
}
}
/* Link auth_vhost node to global list vhosts_list */
mk_list_add(&auth_vhost->_head, &vhosts_list);
}
#ifdef TRACE
struct mk_list *vh_head, *loc_head;
struct vhost *vh_entry;
struct location *loc_entry;
mk_list_foreach(vh_head, &vhosts_list) {
vh_entry = mk_list_entry(vh_head, struct vhost, _head);
PLUGIN_TRACE("Auth VHost: %p", vh_entry->host);
mk_list_foreach(loc_head, &vh_entry->locations) {
loc_entry = mk_list_entry(loc_head, struct location, _head);
PLUGIN_TRACE("---");
PLUGIN_TRACE(" location: %s", loc_entry->path);
PLUGIN_TRACE(" title : %s", loc_entry->title);
PLUGIN_TRACE(" users : %s", loc_entry->users->path);
}
}
#endif
return 0;
}
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