Encrypto

Encrypto is a command-line utility to encrypt and decrypt directories. It compresses the contents to protect and then encrypts the archive with AES-GCM to produce a single .crypt file.

Technical details

• Key derivation via PBKDF2 (SHA-256, 100,000 iterations) with a 16-byte salt.
• Symmetric AES-256 encryption in GCM mode with a 12-byte initialization vector (IV).
• The resulting file is structured as: salt || IV || tag || ciphertext.
• For interoperability, the encrypted content is a ZIP archive of the source directory.

Usage

Commands

encrypt

Encrypts a directory.

encrypto encrypt -s <directory> -p <password> [-d <output_file>]

decrypt

Decrypts a .crypt file.

encrypto decrypt -s <file.crypt> -p <password> [-d <destination_directory>]

Common options

• -s, --source: path to the source directory or file.
• -p, --password: password used to derive the key.
• -d, --destination: output path. For encrypt, this is the generated file (default <source>.crypt). For decrypt, this is the destination directory (default a folder with the same name as the file without extension).

License

This project is licensed under the MIT license.