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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_BINDER_SECURITY_POLICY_H
#define GRPCPP_SECURITY_BINDER_SECURITY_POLICY_H
#include <memory>
#ifdef GPR_ANDROID
#error #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
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