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easy-rsa-shell

Easy and secure shell for manage a PKI CA using EasyRSA

Project status: Public Beta

How it works

Build a docker image at first run. It contains EasyRSA3, zuluCrypt and other tools. You will login to docker container after build. The encrypted data file will be mounted at home directory (/root). The home directory is prepared for EasyRSA. You can work freely under /root. All files under the directory are encrypted.

Supported OS

  • Windows (Available batch file and shell script for WSL)
  • Linux
  • macOS

Requirements: docker

Login

$ easy-rsa-shell DATAFILE

Demo

$ ./easy-rsa-shell datafile
Building easy-rsa-shell docker image. Wait a minute...
Create encrypted volume
Enter passphrase:
Re enter passphrase:
Wait a few seconds...
SUCCESS: volume opened successfully
The encrypted volume was mounted at the '/var/data' directory
Make CA directory [/var/data/ca]
The CA directory was merged the '/root' directory using by unionfs

======================================================================
|| easy_rsa shell                                                   ||
======================================================================
The files under the '/root' directory are encrypted. The directories
'/root', '/var/data' and '/tmp' are writable. Others are read-only.

Commands:
  help    See this message.
  cheat   See cheat sheet.
  exit    Exit with commit changes.
  abort   Exit with discard changes.

root@ca:~# ls -al
total 29
drwx------ 1 root root 1024 Jan 11 05:48 .
drwxr-xr-x 1 root root 4096 Jan 11 08:08 ..
-rw-r--r-- 1 root root  570 Jan 31  2010 .bashrc
-rw-r--r-- 1 root root  148 Aug 17  2015 .profile
lrwxrwxrwx 1 root root   27 Jan 11 04:40 easyrsa -> /usr/share/easy-rsa/easyrsa
-rw-r--r-- 1 root root 4652 Jan 11 04:40 openssl-easyrsa.cnf
-rw-r--r-- 1 root root 8576 Jan 11 04:40 vars
lrwxrwxrwx 1 root root   30 Jan 11 04:40 x509-types -> /usr/share/easy-rsa/x509-types
root@ca:~#

How to securely transfer certificate and key files

1. SSH / SCP

You can use ssh and scp inside of easy-rsa-shell.

2. OpenSSL S/MIME

You can export S/MIME encripted file.

Create certificate

  • The recipient creates the certificate.
  • You can skip if already have certificate.

Create self-signed certificate from id_rsa

$ openssl req -new -key id_rsa > id_rsa.csr
$ openssl x509 -days 3650 -req -signkey id_rsa < id_rsa.csr > id_rsa.crt

Export

$ easy-rsa-shell.sh DATAFILE smime NAME < id_rsa.crt
$ easy-rsa-shell DATAFILE export NAME -f tgz -e openssl:smime > NAME.tgz.encrypted

Decode

$ openssl smime -decrypt -in NAME.tgz.encrypted -inkey id_rsa -o NAME.tgz

3. OpenSSL Secret key encryption

Export

$ easy-rsa-shell.sh DATAFILE password NAME
$ easy-rsa-shell DATAFILE export NAME -f tgz -e openssl:password -m -aes-256-cbc > NAME.tgz.encrypted

Decode

$ openssl enc -d -aes-256-cbc -in NAME.tgz.encrypted -o NAME.tgz

4. Password protected ZIP

Export

$ easy-rsa-shell.sh DATAFILE password NAME
$ easy-rsa-shell DATAFILE export NAME -f zip -e password -r > NAME.zip

Customize easy-rsa-shell

Create docker/root/.onbuild if you want to customize easy-rsa-shell (e.g. install other package). The .onbuild script is invoked at building docker image stage.

And also you can place various files freely in the docker/root/ directory.

Envrionment variables

name description
EASY_RSA_SHELL_PASSWORD The password to login
EASY_RSA_SHELL_ALLOW_WEAK_PASSWORD Set 1 to allow weak password

Rescue data without easy-rsa-shell

The data file is encrypted with VeraCrypt and use NTFS. Therefore you can mount with VeraCrypt