THUAI6/CAPI/cpp/grpc/include/grpcpp/security/binder_security_policy.h

// 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_BINDER_SECURITY_POLICY_H
#define GRPCPP_SECURITY_BINDER_SECURITY_POLICY_H

#include <memory>

#ifdef GPR_ANDROID

#include <jni.h>

#endif

namespace grpc
{
    namespace experimental
    {
        namespace binder
        {

            // EXPERIMENTAL Determinines if a connection is allowed to be
            // established on Android. See https://source.android.com/security/app-sandbox
            // for more info about UID.
            class SecurityPolicy
            {
            public:
                virtual ~SecurityPolicy() = default;
                // Returns true if the UID is authorized to connect.
                // Must return the same value for the same inputs so callers can safely cache
                // the result.
                virtual bool IsAuthorized(int uid) = 0;
            };

            // EXPERIMENTAL Allows all connection. Anything on the Android device will be
            // able to connect, use with caution!
            class UntrustedSecurityPolicy : public SecurityPolicy
            {
            public:
                UntrustedSecurityPolicy();
                ~UntrustedSecurityPolicy() override;
                bool IsAuthorized(int uid) override;
            };

            // EXPERIMENTAL Only allows the connections from processes with the same UID. In
            // most cases this means "from the same APK".
            class InternalOnlySecurityPolicy : public SecurityPolicy
            {
            public:
                InternalOnlySecurityPolicy();
                ~InternalOnlySecurityPolicy() override;
                bool IsAuthorized(int uid) override;
            };

#ifdef GPR_ANDROID

            // EXPERIMENTAL Only allows the connections from the APK that have the same
            // signature.
            class SameSignatureSecurityPolicy : public SecurityPolicy
            {
            public:
                // `context` is required for getting PackageManager Java class
                SameSignatureSecurityPolicy(JavaVM* jvm, jobject context);
                ~SameSignatureSecurityPolicy() override;
                bool IsAuthorized(int uid) override;

            private:
                JavaVM* jvm_;
                jobject context_;
            };

#endif

        }  // namespace binder
    }      // namespace experimental
}  // namespace grpc

#endif  // GRPCPP_SECURITY_BINDER_SECURITY_POLICY_H