syntax = "proto3";

/*
 * Intercept message from sudo_intercept.so.  Messages on the
 * wire are prefixed with a 32-bit size in host byte order.
 */
message InterceptRequest {
  oneof type {
    PolicyCheckRequest policy_check_req = 1;
    InterceptHello hello = 2;
  }
}

/*
 * Hello message from sudo_intercept.so to main sudo process.
 * Sudo sends back the token and localhost port number.
 */
message InterceptHello {
    int32 pid = 1;
}

/*
 * Sudo response to an InterceptHello from sudo_intercept.so.
 * The client uses the port number and token to connect back to sudo.
 * If log_only is set there is no InterceptResponse to a PolicyCheckRequest.
 */
message HelloResponse {
  fixed64 token_lo = 1;
  fixed64 token_hi = 2;
  int32 portno = 3;
  bool log_only = 4;
}

/*
 * Policy check request from sudo_intercept.so.
 * Note that the plugin API only currently supports passing
 * the new environment in to the open() function.
 */
message PolicyCheckRequest {
  string command = 1;
  string cwd = 2;
  repeated string argv = 3;
  repeated string envp = 4;
  int32 intercept_fd = 5;
}

message PolicyAcceptMessage {
  string run_command = 1;
  repeated string run_argv = 2;
  repeated string run_envp = 3;
}

message PolicyRejectMessage {
  string reject_message = 1;
}

message PolicyErrorMessage {
  string error_message = 1;
}

/*
 * Response sent back to sudo_intercept.so.
 */
message InterceptResponse {
  oneof type {
    HelloResponse hello_resp = 1;
    PolicyAcceptMessage accept_msg = 2;
    PolicyRejectMessage reject_msg = 3;
    PolicyErrorMessage error_msg = 4;
  }
}
