acme.sh - Obtain Let's Encrypt certificate for Nginx vhost

2019-10-04 System @JS

My test platform: Debian 9.9

Requirements: user with root privileges or non-root user with sudo privileges.

acme.sh installation

$ sudo su - root
git clone https://github.com/Neilpang/acme.sh.git
cd acme.sh 
./acme.sh --install --accountemail your_email@yourdomain.com
source ~/.bashrc
cd ~
acme.sh --version

Obtain RSA and ECC/ECDSA certificates for your domain/hostname:

# RSA 2048
acme.sh --issue --standalone -d yourdomain.com --keylength 2048
# ECDSA
acme.sh --issue --standalone -d yourdomain.com --keylength ec-256

After running the above commands, your certificates and keys will be in:

RSA: /home/username/yourdomain.com directory.
ECC/ECDSA: /home/username/yourdomain.com_ecc directory.

To view the issued certificates, run:

acme.sh --list

Create a directory to store your certs:

mkdir -p /etc/letsecnrypt/yourdomain.com
mkdir -p /etc/letsencrypt/yourdomain.com_ecc

Install/copy the certificates to the /etc/letsencrypt directory (example with the Nginx http server):

# RSA
acme.sh --install-cert -d yourdomain.com --cert-file /etc/letsencrypt/yourdomain.com/cert.pem \
        --key-file /etc/letsencrypt/yourdomain.com/private.key --fullchain-file /etc/letsencrypt/yourdomain.com/fullchain.pem \
        --reloadcmd "sudo systemctl reload nginx.service"
# ECC/ECDSA
acme.sh --install-cert -d yourdomain.com --ecc --cert-file /etc/letsencrypt/yourdomain.com_ecc/cert.pem \
        --key-file /etc/letsencrypt/yourdomain.com_ecc/private.key --fullchain-file /etc/letsencrypt/yourdomain.com_ecc/fullchain.pem \
        --reloadcmd "sudo systemctl reload nginx.service"
# return back to normal user
exit

All the certificates will be automatically renewed every 60 days.