tashian

How to create and import a root CA key and certificate onto multiple YubiKeys (for backup / cold storage purposes), and use the root CA to sign a new intermediate CA on a different YubiKey that will be used with step-ca for online leaf certificate signing.

You will need:

• ykman
• step
• step-kms-plugin
• At least three YubiKeys with PIV support. One will be used for an online intermediate CA, and the rest will be for offline root CA backups.

First, on an airgapped machine, generate a key pair on disk:

tashian

#!/bin/bash
# Using a TPM EKcert filename as input, this script recursively fetches TPM CA certificates.
# It depends on the EKcert having an AIA (Authority Information Access) Issuer URI field.
# This field is not required and may not be present.
# If available, the CA certificates will be saved into the current directory.
#
# To use this script, you will need the following programs:
# jq — https://jqlang.github.io/jq/
# step — https://smallstep.com/docs/step-cli/installation/
# curl

tashian

FROM smallstep/step-cli as step
FROM mongo
COPY --from=step /usr/local/bin/step /usr/local/bin/
ARG CA_URL
ARG CA_FINGERPRINT
ENV CA_URL=${CA_URL} CA_FINGERPRINT=${CA_FINGERPRINT}
RUN step ca bootstrap --ca-url $CA_URL --fingerprint $CA_FINGERPRINT --install

tashian

FROM mongo
ARG CA_URL
ARG CA_FINGERPRINT
ENV CA_URL=${CA_URL} CA_FINGERPRINT=${CA_FINGERPRINT}
RUN apt update; \
    apt install -y --no-install-recommends \
        curl \
        jq \
        openssl \
    ; \

tashian

# my global config
global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'
    # metrics_path defaults to '/metrics'

tashian

#!/bin/bash
### Basic build environment #######

apt update
apt install -y make gcc ack libpcsclite-dev pkg-config unzip debhelper
apt upgrade -y

cd /root

## Install golang

tashian

#!/bin/bash

CA_NAME="Tiny"
ROOT_KEY_PASSWORD="smallsteplabs"
EMAIL="carl@smallstep.com"

if [ -f /etc/os-release ]; then
    # freedesktop.org and systemd
    . /etc/os-release
    OS=$NAME

tashian

# Loki config based on
# https://github.com/grafana/loki/blob/master/cmd/loki/loki-local-config.yaml
# The only thing I've changed is the server: block.

auth_enabled: false

server:
  http_listen_address: 127.0.0.1
  http_listen_port: 3100
  grpc_listen_address: 127.0.0.1

tashian

{
    "clientId": "step-ca",
    "rootUrl": "http://127.0.0.1:10000",
    "adminUrl": "http://127.0.0.1:10000",
    "surrogateAuthRequired": false,
    "enabled": true,
    "alwaysDisplayInConsole": false,
    "clientAuthenticatorType": "client-secret",
    "redirectUris": [
        "http://127.0.0.1:10000/*"

tashian

#!/bin/bash
#
# This script will get an SSH host certificate from our CA and add a weekly
# cron job to rotate the host certificate. It should be run as root.
# 
# See https://smallstep.com/blog/diy-single-sign-on-for-ssh/ for full instructions

CA_URL="[Your CA URL]"

# Obtain your CA fingerprint by running this on your CA: