98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
// Copyright 2019 Google LLC
|
|
//
|
|
// 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
|
|
//
|
|
// https://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.
|
|
|
|
// The sandbox2::Notify class handless exceptional situations in the sandbox
|
|
|
|
#ifndef SANDBOXED_API_SANDBOX2_NOTIFY_H_
|
|
#define SANDBOXED_API_SANDBOX2_NOTIFY_H_
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "absl/base/attributes.h"
|
|
#include "absl/log/log.h"
|
|
#include "sandboxed_api/sandbox2/comms.h"
|
|
#include "sandboxed_api/sandbox2/result.h"
|
|
#include "sandboxed_api/sandbox2/syscall.h"
|
|
#include "sandboxed_api/sandbox2/util.h"
|
|
|
|
namespace sandbox2 {
|
|
|
|
enum ViolationType {
|
|
// A syscall disallowed by the policy was invoked.
|
|
kSyscallViolation,
|
|
// A syscall with cpu architecture not covered by the policy was invoked.
|
|
kArchitectureSwitchViolation,
|
|
};
|
|
|
|
class Notify {
|
|
public:
|
|
virtual ~Notify() = default;
|
|
|
|
// Called when a process has been created and executed, but not yet sandboxed.
|
|
// Using comms only makes sense if the client is sandboxed in the
|
|
// Executor::set_enable_sandbox_before_exec(false) mode.
|
|
// Returns a success indicator: false will cause the Sandbox Monitor to return
|
|
// sandbox2::Result::SETUP_ERROR for Run()/RunAsync().
|
|
virtual bool EventStarted(pid_t pid, Comms* comms) { return true; }
|
|
|
|
// Called when all sandboxed processes finished.
|
|
virtual void EventFinished(const Result& result) {}
|
|
|
|
// Called when a process exited with a syscall violation.
|
|
virtual void EventSyscallViolation(const Syscall& syscall,
|
|
ViolationType type) {}
|
|
|
|
// Called when a policy called TRACE. The syscall is allowed and logged if
|
|
// this method returns true. This allows for implementing 'log, but allow'
|
|
// policies.
|
|
ABSL_DEPRECATED("Override EventSyscallTrace() instead")
|
|
virtual bool EventSyscallTrap(const Syscall& syscall) { return false; }
|
|
|
|
// Actions to perform after calling EventSyscallTrace.
|
|
enum class TraceAction {
|
|
// Deny the syscall.
|
|
kDeny,
|
|
// Allow the syscall.
|
|
kAllow,
|
|
// Allow the syscall so its return value can be inspected through a
|
|
// subsequent call to EventSyscallReturn.
|
|
// Requires Linux kernel 4.8 or later.
|
|
kInspectAfterReturn
|
|
};
|
|
|
|
// Called when a policy called TRACE. The syscall is allowed or denied
|
|
// depending on the return value of this function.
|
|
virtual TraceAction EventSyscallTrace(const Syscall& syscall) {
|
|
if (EventSyscallTrap(syscall)) {
|
|
LOG(WARNING) << "[PERMITTED]: SYSCALL ::: PID: " << syscall.pid()
|
|
<< ", PROG: '" << util::GetProgName(syscall.pid())
|
|
<< "' : " << syscall.GetDescription();
|
|
return TraceAction::kAllow;
|
|
}
|
|
return TraceAction::kDeny;
|
|
}
|
|
|
|
// Called when a policy called TRACE and EventSyscallTrace returned
|
|
// kInspectAfterReturn.
|
|
virtual void EventSyscallReturn(const Syscall& syscall,
|
|
int64_t return_value) {}
|
|
|
|
// Called when a process received a signal.
|
|
virtual void EventSignal(pid_t pid, int sig_no) {}
|
|
};
|
|
|
|
} // namespace sandbox2
|
|
|
|
#endif // SANDBOXED_API_SANDBOX2_NOTIFY_H_
|