cryptgo

Simplistic CLI tool for encrypting and decrypting files based on RSA keys.

Features

• Asymmetric encryption/decryption.
• Hash SHA512 based.
• Random source of entropy ensure that encrypting the same message twice doesn't result in the same ciphertex.
• Encrypts single file using your system ~/.ssh/id_rsa to generate new public key.
• Decrypts single file using your system ~/.ssh/id_rsa (private) key.
• Can encrypt and decrypt files with RSA key generated with passphrase.
• Encrypt single file using auto generated rsa key, saves key in to given path
• Decrypts single file using file key from provided path

Usage

• dependencies

Please be sure you have rsa key: RSA PRIVATE KEY created under ~/.ssh/ folder

To create one write in terminal: ssh-keygen -t rsa -m PEM

• help

cryptgo --help

• encrypt

cryptgo --input <file path to enrypt> --output <new encrypted file path> encrypt

• decrypt

cryptgo --input <path to encrypted file> --output <new decrypted file path> decrypt

• passwd encrypt

cryptgo --input <file to enrypt path> --output <new encrypted file path> --passwd <passphrase> encrypt

• passwd decrypt

cryptgo --input <encrypted file path> --output <new decrypted file path> --passwd <passphrase> decrypt

• auto generate key encrypt

cryptgo --input <file path to enrypt> --output <new encrypted file path> -generate <path where to save rsa key> encrypt

• use key from path decrypt

cryptgo --input <path to encrypted file> --output <new decrypted file path> -use <path to rsa key to be used> decrypt

Building

This software runs on OSX and Unix based systems, it is not working on Windows yet.

Build with go build .

To compress binary build with go build -ldflags="-s -w" then run upx -9 -v cryptgo (~2MB binary)

Development

• Recommended go version is go1.17 or higher.
• Write an issue please or make a PR against main branch (there is no development branch yet)
• Please write test for core functionalities before making PR.

Features to implement in the future

• Support for folders encryption/decryption.
• Support for other asymmetric keys.
• P2P encrypted message communication.
• make it available for windows