File Encryption & Decryption in Go

This project provides a simple implementation of file encryption and decryption using the AES-GCM (Galois/Counter Mode) in Go. It demonstrates how to securely encrypt and decrypt files using a secret key.

Requirements

• Go 1.16 or later

Usage

Setup

1. Clone the repository:

   git clone https://github.com/theognis1002/go-encrypt
   cd go-encrypt/

2. Set the secret key:

   Update the key variables in the .env file (using .env.sample as a reference) with your 16, 24, or 32 bytes key for AES-128, AES-192, or AES-256 respectively.

Makefile Commands

The Makefile includes commands to build, encrypt, and decrypt files, as well as to clean up the build files.

1. Build the project:

   make build

   This command compiles the Go program into a binary named file-crypto.

2. Encrypt a file:

   make encrypt

   This command encrypts the file example.csv into encrypted.csv. You can change the input and output filenames by editing the Makefile or running the binary directly with the desired arguments.

3. Decrypt a file:

   make decrypt

   This command decrypts the file encrypted.csv into decrypted.csv.

4. Clean up build files:

   make clean

   This command removes the binary and any other build-related files.

Example Usage

Encrypting a file

1. To encrypt example.csv into encrypted.csv, run:

   make encrypt

Decrypting a file

2. To decrypt encrypted.csv into decrypted.csv, run:

   make decrypt