README.md for Henk

Introduction

Henk is a Command-Line Interface (CLI) utility designed for encoding and decoding files. The program supports a range of encoding and decoding algorithms and offers two specific commands: Encode and Decode. Built on the Java platform, it uses the picocli library for command-line argument and option handling.

Installation

Compile the Java classes and package them into a JAR file. Make sure to include the picocli library in your classpath.

Usage

Command for Encoding a File

java -jar <path-to-jar> <input-file-path> <output-file-path> <type> [--key <key>] Encode

Command for Decoding a File

java -jar <path-to-jar> <input-file-path> <output-file-path> <type> [--key <key>] Decode

Parameters

• <input-file-path>: Path to the file you want to encode or decode.
• <output-file-path>: Path where the encoded or decoded file will be saved.
• <type>: Specifies the type of encoding or decoding to use. Available types are "base64," "rot13," and "aes."

Options

• --key <key>: [Optional] Specifies the key for encoding or decoding types that rely on cryptographic keys (e.g., "aes").

Examples

Encoding a File with Base64

java -jar Henk.jar inputFile output.txt base64 Encode

Decoding a File with Base64

java -jar Henk.jar input.txt output.txt base64 Decode

Supported Processors

• Base64 Encoder
• Base64 Decoder
• ROT13 Processor (encoder and decoder)
• AES Encoder [Key of 16, 24, 32 bytes]
• AES Decoder [Key of 16, 24, 32 bytes]

Return Codes

• 0: Success
• 1: Failure (e.g., invalid type specified)

Contributing and Support

For any issues, please refer to the source code and submit a pull request. Feel free to extend the supported algorithms by modifying the DataProcessorFactory class and implementing new IDataProcessor classes.