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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <memory>
#include <vector>
#include "mongo/db/auth/restriction.h"
#include "mongo/stdx/memory.h"
namespace mongo {
namespace detail {
// Represents a set of restrictions, which may be attached to a user or role.
// This set of restrictions is met by a RestrictionEnvironment, if any restriction
// in the set is met by the RestrictionEnvironment, or if the set is empty.
template <typename T,
template <typename...> class Pointer = std::unique_ptr,
template <typename...> class Sequence = std::vector>
class RestrictionSetAny : public Restriction {
static_assert(std::is_base_of<Restriction, T>::value,
"RestrictionSets must contain restrictions");
public:
using element_type = T;
using pointer_type = Pointer<element_type>;
using sequence_type = Sequence<pointer_type>;
RestrictionSetAny() = default;
explicit RestrictionSetAny(sequence_type restrictions)
: _restrictions(std::move(restrictions)) {}
template <typename U>
explicit RestrictionSetAny(std::unique_ptr<U> restriction) {
_restrictions.push_back(std::move(restriction));
}
Status validate(const RestrictionEnvironment& environment) const final {
if (_restrictions.empty()) {
return Status::OK();
}
for (const pointer_type& restriction : _restrictions) {
Status status = restriction->validate(environment);
if (status.isOK()) {
return status;
}
}
return Status(ErrorCodes::AuthenticationRestrictionUnmet,
str::stream() << "No member restriction in '" << *this << "' met");
}
private:
void serialize(std::ostream& os) const override final {
os << "{anyOf: [";
for (const pointer_type& restriction : _restrictions) {
if (restriction.get() != _restrictions.front().get()) {
os << ", ";
}
os << *restriction;
}
os << "]}";
}
sequence_type _restrictions;
};
// Represents a set of restrictions which may be attached to a user or role. This set of is met by
// a RestrictionEnvironment, if each set is met by the RestrictionEnvironment.
template <typename T,
template <typename...> class Pointer = std::unique_ptr,
template <typename...> class Sequence = std::vector>
class RestrictionSetAll : public Restriction {
static_assert(std::is_base_of<Restriction, T>::value,
"RestrictionSets must contain restrictions");
public:
using element_type = T;
using pointer_type = Pointer<element_type>;
using sequence_type = Sequence<pointer_type>;
RestrictionSetAll() = default;
explicit RestrictionSetAll(sequence_type restrictions)
: _restrictions(std::move(restrictions)) {}
template <typename U>
explicit RestrictionSetAll(std::unique_ptr<U> restriction) {
_restrictions.push_back(std::move(restriction));
}
template <typename R>
explicit RestrictionSetAll(const R& restriction) {
static_assert(std::is_base_of<Restriction, R>::value, "Must pass a Restriction type.");
_restrictions.push_back(stdx::make_unique<R>(restriction));
}
Status validate(const RestrictionEnvironment& environment) const final {
for (const pointer_type& restriction : _restrictions) {
Status status = restriction->validate(environment);
if (!status.isOK()) {
return Status(ErrorCodes::AuthenticationRestrictionUnmet,
str::stream() << "Restriction '" << *restriction << "' in '" << *this
<< "' unmet");
}
}
return Status::OK();
}
private:
void serialize(std::ostream& os) const final {
os << "{allOf: [";
for (const pointer_type& restriction : _restrictions) {
if (restriction.get() != _restrictions.front().get()) {
os << ", ";
}
os << *restriction;
}
os << "]}";
}
sequence_type _restrictions;
};
} // namespace detail
// Users and roles may have a set of sets of restrictions. The set of set of restrictions is met if
// any of the sets are met. The sets are met if all of their restrictions are met.
// A user may have restrictions, and may have roles with restrictions. If it acquires multiple
// sets of restrictions, then the user's restrictions, and each of their roles' restrictions must
// be met.
template <template <typename...> class Pointer = std::unique_ptr,
template <typename...> class Sequence = std::vector>
using RestrictionSet = detail::RestrictionSetAll<Restriction, Pointer, Sequence>;
template <template <typename...> class Pointer = std::unique_ptr,
template <typename...> class Sequence = std::vector>
using RestrictionDocument = detail::RestrictionSetAny<RestrictionSet<>, Pointer, Sequence>;
template <template <typename...> class Pointer = std::unique_ptr,
template <typename...> class Sequence = std::vector>
using RestrictionDocumentsSequence =
detail::RestrictionSetAll<RestrictionDocument<>, Pointer, Sequence>;
using SharedRestrictionDocument = std::shared_ptr<RestrictionDocument<>>;
using RestrictionDocuments = RestrictionDocumentsSequence<std::shared_ptr, std::vector>;
} // namespace mongo
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