zyedidia / crypt

A tool for making password-protected files

Crypt: create password-protected files

Crypt is a simple tool to encrypt/decrypt files and directories and lock them behind a password. There are three commands:

Lock

Creates a secure .crypt archive from a set of files.

$ crypt lock file.txt

lock [OPTS] FILES:
  Archive and encrypt files or directories.
  -o string
    	output crypt file name

Unlock

Extracts a .crypt archive.

$ crypt unlock file.txt.crypt

unlock [OPTS] FILE:
  Decrypt and extract crypt archives.
  -o string
    	directory to place extracted files

Op

Operates in-place on a .crypt archive. The op command lets you run an arbitrary command on the decrypted archive, available in the temporary file system. Once complete, the files will be re-locked, including any modifications made, and the temporarily decrypted files will be removed. For example, you can edit an encrypted file:

$ crypt op file.txt.crypt micro file.txt

Or open an interactive shell and view/edit the files from there:

$ crypt op file.txt.crypt bash

The -pipe option will tell crypt to send the decrypted file contents to the op command's stdin via a pipe rather than via the temporary file system. The command's stdout will be written back to the file. This only works for single-file crypt archives. The benefit of this approach is that the decrypted file is only ever in process memory, rather than available in the file system, which makes it more secure. For example to edit a file with micro and -pipe:

$ crypt op -pipe file.txt.crypt micro

op FILE COMMAND:
  Operate on a crypt file.
  -pipe
        pipe encrypted file instead of using temp files

Install

Prebuilt binary (see releases):

eget zyedidia/crypt

From source:

go install github.com/zyedidia/crypt@latest