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// Copyright 2021 gRPC authors.
//
// 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.
#ifndef GRPCPP_SECURITY_AUTHORIZATION_POLICY_PROVIDER_H
#define GRPCPP_SECURITY_AUTHORIZATION_POLICY_PROVIDER_H
#include <memory>
#include <grpc/status.h>
#include <grpcpp/impl/codegen/grpc_library.h>
// TODO(yihuazhang): remove the forward declarations here and include
// <grpc/grpc_security.h> directly once the insecure builds are cleaned up.
typedef struct grpc_authorization_policy_provider
grpc_authorization_policy_provider;
namespace grpc {
namespace experimental {
// Wrapper around C-core grpc_authorization_policy_provider. Internally, it
// handles creating and updating authorization engine objects, using SDK
// authorization policy.
class AuthorizationPolicyProviderInterface {
public:
virtual ~AuthorizationPolicyProviderInterface() = default;
virtual grpc_authorization_policy_provider* c_provider() = 0;
};
// Implementation obtains authorization policy from static string. This provider
// will always return the same authorization engines.
class StaticDataAuthorizationPolicyProvider
: public AuthorizationPolicyProviderInterface {
public:
static std::shared_ptr<StaticDataAuthorizationPolicyProvider> Create(
const TString& authz_policy, grpc::Status* status);
// Use factory method "Create" to create an instance of
// StaticDataAuthorizationPolicyProvider.
explicit StaticDataAuthorizationPolicyProvider(
grpc_authorization_policy_provider* provider)
: c_provider_(provider) {}
~StaticDataAuthorizationPolicyProvider() override;
grpc_authorization_policy_provider* c_provider() override {
return c_provider_;
}
private:
grpc_authorization_policy_provider* c_provider_ = nullptr;
};
// Implementation obtains authorization policy by watching for changes in
// filesystem.
class FileWatcherAuthorizationPolicyProvider
: public AuthorizationPolicyProviderInterface {
public:
static std::shared_ptr<FileWatcherAuthorizationPolicyProvider> Create(
const TString& authz_policy_path, unsigned int refresh_interval_sec,
grpc::Status* status);
// Use factory method "Create" to create an instance of
// FileWatcherAuthorizationPolicyProvider.
explicit FileWatcherAuthorizationPolicyProvider(
grpc_authorization_policy_provider* provider)
: c_provider_(provider) {}
~FileWatcherAuthorizationPolicyProvider() override;
grpc_authorization_policy_provider* c_provider() override {
return c_provider_;
}
private:
grpc_authorization_policy_provider* c_provider_ = nullptr;
};
} // namespace experimental
} // namespace grpc
#endif // GRPCPP_SECURITY_AUTHORIZATION_POLICY_PROVIDER_H
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