Docker Daemon CA setup

README.md

• The script is just a wrapper of the commands listed at https://docs.docker.com/engine/security/https/
• Switch around the HOST and HOST1 variables and run

generate.sh

#!/bin/bash
sudo rm *.pem *.csr *.cnf
export HOST="docker.vpn.bb8.fun"
export HOST2="docker.in.bb8.fun"
openssl genrsa -aes256 -out ca-key.pem -passout pass:foobar 4096
openssl genrsa -out server-key.pem 4096

openssl req -subj "/CN=docker.bb8.fun" -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem -passin pass:foobar

openssl req -subj "/CN=$HOST" -sha256 -new -key server-key.pem -out server.csr
echo subjectAltName=DNS:$HOST,DNS:$HOST2 > extfile.cnf
echo extendedKeyUsage=serverAuth >> extfile.cnf
openssl x509 -req -days 365 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem \
  -CAcreateserial -out server-cert.pem -extfile extfile.cnf -passin pass:foobar

openssl genrsa -out key.pem 4096
openssl req -subj '/CN=client' -new -key key.pem -out client.csr
echo extendedKeyUsage = clientAuth >> extfile.cnf
openssl x509 -req -days 365 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem \
  -CAcreateserial -out cert.pem -extfile extfile.cnf -passin pass:foobar

chmod -v 0400 ca.pem key.pem server-key.pem
chmod -v 0444 ca.pem server-cert.pem cert.pem