README.md

ENC - Simple Encoder/Decoder Utility

ENC is a lightweight command-line utility for performing basic encoding and decoding operations. It currently supports Base64 and ROT13 (Caesar cipher variant) transformations. You can provide input directly as a string or from a file, and output the result to the console.

Features

Flexible Input: Read input data directly from the command line or from a specified file.

Not so Multiple Algorithms:

• Base64: Standard Base64 encoding/decoding.
• ROT13: A simple Caesar cipher (symmetric, so the same operation encodes and decodes). Encode/Decode Modes: Clearly specify whether you want to encode or decode. Console or File Output: Display results directly in your terminal or save them to a file. How to Build To build enc, you'll need a C++ compiler (like g++.exe), go to the root directory and run:

g++ source/entrypoint.cpp -o enc.exe -Wall -Wextra -std=c++20

Adjust g++ and c++ flags accordingly to your system

Or just using the compile.bat file in the root for Windows

Usage

enc.exe [source] <flags> [destination]

Input Source:
  "<text>"     : Input text directly from command line (enclose in quotes)
  <filepath>   : Path to a file to read input from

Flags:
  -help        : Display help message
  -file_in     : Use file as input in <source>
  -base64      : Base64
  -rot13       : ROT13 (Caesar cipher variant)
  -encode      : Encode mode (default)
  -decode      : Decode mode

Output Destination (Optional):
  <filepath>    : Path to a file to write output to. If omitted, output goes to console.

Examples, run:

enc.exe "this is a message" -encode -base64

will give

aGlzIGlzIGEgbWVzc2Fn

Notes on Development

• Argument Parsing: The application uses a custom hashing function for command-line argument parsing.
• Symmetric Operations: ROT13 is a symmetric cipher, meaning the same Convert function is used for both encoding and decoding.