org.owasp.esapi
Interface Executor

All Known Implementing Classes:

DefaultExecutor

public interface Executor

The Executor interface is used to run an OS command with reduced security risk.

Implementations should do as much as possible to minimize the risk of injection into either the command or parameters. In addition, implementations should timeout after a specified time period in order to help prevent denial of service attacks.

The class should perform logging and error handling as well. Finally, implementation should handle errors and generate an ExecutorException with all the necessary information.

The reference implementation does all of the above.

Since:

June 1, 2007

Author:

Jeff Williams (jeff.williams .at. aspectsecurity.com) Aspect Security

Method Summary

java.lang.String	executeSystemCommand(java.io.File executable, java.util.List params) Invokes the specified executable with default workdir and codec and not logging parameters.
java.lang.String	executeSystemCommand(java.io.File executable, java.util.List params, java.io.File workdir, Codec codec, boolean logParams) Executes a system command after checking that the executable exists and escaping all the parameters to ensure that injection is impossible.

Method Detail

executeSystemCommand

java.lang.String executeSystemCommand(java.io.File executable,
                                      java.util.List params)
                                      throws ExecutorException

Invokes the specified executable with default workdir and codec and not logging parameters.

Parameters:

executable - the command to execute

params - the parameters of the command being executed

Throws:

ExecutorException

executeSystemCommand

java.lang.String executeSystemCommand(java.io.File executable,
                                      java.util.List params,
                                      java.io.File workdir,
                                      Codec codec,
                                      boolean logParams)
                                      throws ExecutorException

Executes a system command after checking that the executable exists and escaping all the parameters to ensure that injection is impossible. Implementations must change to the specified working directory before invoking the command.

Parameters:

executable - the command to execute

params - the parameters of the command being executed

workdir - the working directory

codec - the codec to use to encode for the particular OS in use

logParams - use false if any parameters contains sensitive or confidential information

Returns:

the output of the command being run

Throws:

ExecutorException - the service exception