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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Monty Taylor <mordred@inaugust.com>
* Copyright (C) 2011 Canonical, Ltd.
* Author: Clint Byrum <clint.byrum@canonical.com>
*
* Copied from simple_user_policy
*
* 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; version 2 of the License.
*
* 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
*/
#pragma once
#include <iosfwd>
#include <boost/regex.hpp>
#include <boost/unordered_map.hpp>
#include <boost/thread/mutex.hpp>
#include <drizzled/configmake.h>
#include <drizzled/plugin/authorization.h>
namespace fs= boost::filesystem;
namespace regex_policy
{
static const fs::path DEFAULT_POLICY_FILE= SYSCONFDIR "/drizzle.policy";
static const char *comment_regex = "^[[:space:]]*#.*$";
static const char *empty_regex = "^[[:space:]]*$";
static const char *table_match_regex = "^([^ ]+) table\\=([^ ]+) (ACCEPT|DENY)$";
static const char *process_match_regex = "^([^ ]+) process\\=([^ ]+) (ACCEPT|DENY)$";
static const char *schema_match_regex = "^([^ ]+) schema\\=([^ ]+) (ACCEPT|DENY)$";
/* These correspond to the parenthesis above and must stay in sync */
static const int MATCH_REGEX_USER_POS= 1;
static const int MATCH_REGEX_OBJECT_POS= 2;
static const int MATCH_REGEX_ACTION_POS= 3;
typedef enum
{
POLICY_ACCEPT,
POLICY_DENY
} PolicyAction;
class PolicyItem
{
const std::string user;
const std::string object;
const boost::regex user_re;
const boost::regex object_re;
PolicyAction action;
public:
PolicyItem(const std::string &u, const std::string &obj, const std::string &act) :
user(u),
object(obj),
user_re(u),
object_re(obj)
{
if (act == "ACCEPT")
{
action = POLICY_ACCEPT;
}
else if (act == "DENY")
{
action = POLICY_DENY;
}
else
{
throw std::exception();
}
}
bool userMatches(std::string &str);
bool objectMatches(std::string &object_id);
bool isRestricted();
const std::string&getUser() const
{
return user;
}
const std::string&getObject() const
{
return object;
}
const char *getAction() const
{
return action == POLICY_ACCEPT ? "ACCEPT" : "DENY";
}
};
typedef std::list<PolicyItem *> PolicyItemList;
typedef boost::unordered_map<std::string, bool> CheckMap;
static boost::mutex check_cache_mutex;
class CheckItem
{
std::string user;
std::string object;
std::string key;
bool has_cached_result;
bool cached_result;
CheckMap **check_cache;
public:
CheckItem(const std::string &u, const std::string &obj, CheckMap **check_cache);
bool operator()(PolicyItem *p);
bool hasCachedResult() const
{
return has_cached_result;
}
bool getCachedResult() const
{
return cached_result;
}
void setCachedResult(bool result);
};
inline bool PolicyItem::userMatches(std::string &str)
{
return boost::regex_match(str, user_re);
}
inline bool PolicyItem::objectMatches(std::string &object_id)
{
return boost::regex_match(object_id, object_re);
}
inline bool PolicyItem::isRestricted()
{
return action == POLICY_DENY ? true : false;
}
void clearPolicyItemList(PolicyItemList policies);
class Policy :
public drizzled::plugin::Authorization
{
public:
Policy(const fs::path &f_path) :
drizzled::plugin::Authorization("Regex Policy"), policy_file(f_path), error(),
table_check_cache(NULL), schema_check_cache(NULL), process_check_cache(NULL)
{ }
virtual bool restrictSchema(const drizzled::identifier::User &user_ctx,
const drizzled::identifier::Schema& schema);
virtual bool restrictProcess(const drizzled::identifier::User &user_ctx,
const drizzled::identifier::User &session_ctx);
virtual bool restrictTable(const drizzled::identifier::User& user_ctx,
const drizzled::identifier::Table& table);
bool loadFile();
std::stringstream &getError() { return error; }
~Policy();
private:
bool restrictObject(const drizzled::identifier::User &user_ctx,
const std::string &obj, const PolicyItemList &policies,
CheckMap **check_cache);
fs::path policy_file;
std::stringstream error;
PolicyItemList table_policies;
PolicyItemList schema_policies;
PolicyItemList process_policies;
CheckMap *table_check_cache;
CheckMap *schema_check_cache;
CheckMap *process_check_cache;
};
} /* namespace regex_policy */
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