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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
*
* 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 <vector>
#include <drizzled/plugin/authorization.h>
#include <drizzled/identifier.h>
#include <drizzled/error.h>
#include <drizzled/session.h>
#include <drizzled/gettext.h>
namespace drizzled
{
std::vector<plugin::Authorization *> authorization_plugins;
bool plugin::Authorization::addPlugin(plugin::Authorization *auth)
{
if (auth != NULL)
authorization_plugins.push_back(auth);
return false;
}
void plugin::Authorization::removePlugin(plugin::Authorization *auth)
{
if (auth != NULL)
{
authorization_plugins.erase(std::find(authorization_plugins.begin(),
authorization_plugins.end(),
auth));
}
}
namespace
{
class RestrictDbFunctor :
public std::unary_function<plugin::Authorization *, bool>
{
const identifier::User &user_ctx;
identifier::Schema::const_reference schema;
public:
RestrictDbFunctor(const identifier::User &user_ctx_arg,
identifier::Schema::const_reference schema_arg) :
std::unary_function<plugin::Authorization *, bool>(),
user_ctx(user_ctx_arg),
schema(schema_arg)
{ }
inline result_type operator()(argument_type auth)
{
return auth->restrictSchema(user_ctx, schema);
}
};
class RestrictTableFunctor :
public std::unary_function<plugin::Authorization *, bool>
{
identifier::User::const_reference user_ctx;
identifier::Table::const_reference table;
public:
RestrictTableFunctor(identifier::User::const_reference user_ctx_arg,
identifier::Table::const_reference table_arg) :
std::unary_function<plugin::Authorization *, bool>(),
user_ctx(user_ctx_arg),
table(table_arg)
{ }
inline result_type operator()(argument_type auth)
{
return auth->restrictTable(user_ctx, table);
}
};
class RestrictProcessFunctor :
public std::unary_function<plugin::Authorization *, bool>
{
const identifier::User &user_ctx;
const identifier::User &session_ctx;
public:
RestrictProcessFunctor(const identifier::User &user_ctx_arg,
const identifier::User &session_ctx_arg) :
std::unary_function<plugin::Authorization *, bool>(),
user_ctx(user_ctx_arg),
session_ctx(session_ctx_arg)
{ }
inline result_type operator()(argument_type auth)
{
return auth->restrictProcess(user_ctx, session_ctx);
}
};
class PruneSchemaFunctor :
public std::unary_function<identifier::Schema&, bool>
{
drizzled::identifier::User::const_reference user_ctx;
public:
PruneSchemaFunctor(drizzled::identifier::User::const_reference user_ctx_arg) :
std::unary_function<identifier::Schema&, bool>(),
user_ctx(user_ctx_arg)
{ }
inline result_type operator()(argument_type auth)
{
return not plugin::Authorization::isAuthorized(user_ctx, auth, false);
}
};
} /* namespace */
bool plugin::Authorization::isAuthorized(identifier::User::const_reference user_ctx,
identifier::Schema::const_reference schema_identifier,
bool send_error)
{
/* If we never loaded any authorization plugins, just return true */
if (authorization_plugins.empty())
return true;
/* Use find_if instead of foreach so that we can collect return codes */
std::vector<plugin::Authorization *>::const_iterator iter=
std::find_if(authorization_plugins.begin(),
authorization_plugins.end(),
RestrictDbFunctor(user_ctx, schema_identifier));
/*
* If iter is == end() here, that means that all of the plugins returned
* false, which means that that each of them believe the user is authorized
* to view the resource in question.
*/
if (iter != authorization_plugins.end())
{
if (send_error)
{
error::access(user_ctx, schema_identifier);
}
return false;
}
return true;
}
bool plugin::Authorization::isAuthorized(drizzled::identifier::User::const_reference user_ctx,
identifier::Table::const_reference table_identifier,
bool send_error)
{
/* If we never loaded any authorization plugins, just return true */
if (authorization_plugins.empty())
return true;
/* Use find_if instead of foreach so that we can collect return codes */
std::vector<plugin::Authorization *>::const_iterator iter=
std::find_if(authorization_plugins.begin(),
authorization_plugins.end(),
RestrictTableFunctor(user_ctx, table_identifier));
/*
* If iter is == end() here, that means that all of the plugins returned
* false, which means that that each of them believe the user is authorized
* to view the resource in question.
*/
if (iter != authorization_plugins.end())
{
if (send_error)
{
error::access(user_ctx, table_identifier);
}
return false;
}
return true;
}
bool plugin::Authorization::isAuthorized(drizzled::identifier::User::const_reference user_ctx,
Session::const_reference session,
bool send_error)
{
/* If we never loaded any authorization plugins, just return true */
if (authorization_plugins.empty())
return true;
// To make sure we hold the user structure we need to have a shred_ptr so
// that we increase the count on the object.
drizzled::identifier::User::const_shared_ptr session_ctx= session.user();
/* Use find_if instead of foreach so that we can collect return codes */
std::vector<plugin::Authorization *>::const_iterator iter=
std::find_if(authorization_plugins.begin(),
authorization_plugins.end(),
RestrictProcessFunctor(user_ctx, *session_ctx));
/*
* If iter is == end() here, that means that all of the plugins returned
* false, which means that that each of them believe the user is authorized
* to view the resource in question.
*/
if (iter != authorization_plugins.end())
{
if (send_error)
{
my_error(ER_KILL_DENIED_ERROR, MYF(0), session.thread_id);
}
return false;
}
return true;
}
void plugin::Authorization::pruneSchemaNames(drizzled::identifier::User::const_reference user_ctx,
identifier::Schema::vector &set_of_schemas)
{
/* If we never loaded any authorization plugins, just return true */
if (authorization_plugins.empty())
return;
set_of_schemas.erase(std::remove_if(set_of_schemas.begin(),
set_of_schemas.end(),
PruneSchemaFunctor(user_ctx)),
set_of_schemas.end());
}
} /* namespace drizzled */
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