crypt

crypt

A simple utility to encrypt & decrypt files with AES-256 with passphrases

Features

• Encrypt files using a single passphrase
• Decryption requires the passphrase & a randomly-generated cryptographically-strong salt
• Easy to wrap my two brain cells around

Installation

First install go from https://go.dev/dl then run the following commands:

go install github.com/keogami/crypt/cmd/crypt@latest

That's the end of it :3

Running crypt

Run crypt by itself to get usage info:

crypt

NAME:
   crypt - encrypt and decrypt files with AES-256

USAGE:
   crypt [global options] command [command options] [arguments...]

COMMANDS:
   encrypt, en, e  encrypt the given file and outputs to stdout
   decrypt, de, d  decrypt the given file and outputs to stdout (on failure outputs nothing)
   help, h         Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --passphrase value, --pass value, -p value  passphrase to be used for operations; if empty, you will be prompted to type it in
   --salt value, -s value                      the file where the salt is to be stored or loaded from
   --output value, --out value, -o value       output is the path to the file where the output is stored, defaults to stdout
   --help, -h                                  show help (default: false)

Encrypting a file

To encrypt files you need to specify three things:

1. A passphrase using -p
2. An output path using -o
3. A path where you want the salt to be stored using -s

crypt -p <your-passphrase> -o <output-path> -s <salt-path> encrypt <input-path>

For example:

crypt -p "my super secure passphrase" -o output.enc -s output.salt encrypt mysecretfile.txt

This will generate two new files:

1. output.enc, the encrypted file
2. output.salt, this file is required to decrypt output.enc

Now you can safely delete the original file ;3

NOTE: To avoid compromising your passphrase, omit -p or supply an empty string to -p and crypt will prompt you to enter your password.

crypt -p "" -o output.enc -s output.salt encrypt mysecretfile.txt

Decrypting a file

To decrypt, you simply do the inverse of encryption:

crypt -p <your-passphrase> -o <decrypted-output-path> -s <salt-path> decrypt <encrypted-input-file>

Now you should have your original file back ;3

What now?

Now you can hide stuff without much hassle X3 thank me later