certificate-validate

Validate some info in SSL/TLS Certificates

prerequisites

• Docker
• Internet Access

build

docker build --no-cache --rm -t <NAME_OF_IMAGE> -f ./Dockerfile .

configuration

Create directory for the configuration file:

mkdir -p <PATH TO DIRECTORY>

Create a file named settings.yml

Copy the config/settings.yml on directory you create before:

cp config/settings.yml <PATH TO DIRECTORY>

settings.yml

variable	description
check_time	Time to wait for the certificate to be validated, is optional, if not set, it will be set to 86400
app_configs
name	Name of the application
host	IP or DNS name of the application
port	Port of the application
environment	Environment of the application
debug	Debug mode of the application
hosts
name	Name of the certificate to validate
url	URL of the certificate to validate
port	Port of the certificate to validate

---
check_time: 30

app_configs:
  - name: 'certificate-validate'
    host: '0.0.0.0'
    port: '5000'
    environment: 'development'
    debug: True 

hosts:
  - name: "github.com"
    url: 'github.com'
    port: '443'

OBS:

For validate more than one certificate, you can add more hosts in the settings.yml file.

hosts:
  - name: "github"
    url: "github.com"
    port: '443'
  - name: "gitlab"
    url: "gitlab.com"
    port: '443'
  - name: "twitter"
    url: "twitter.com"
    port: '443'

volume

docker volume create --driver local -o o=bind -o type=none -o device=<DIR TO BIND> <NAME OF VOLUME>

Example:

docker volume create --driver local -o o=bind -o type=none -o device=/tmp/volume/certificate-validate certificate-validate

permissions

chown -R 1000:1000 <DIR TO BIND ON VOLUME>

Example:

chown -R 1000:1000 /tmp/volume/certificate-validate

entrypoint

"
usage: 

export API_HOST_ADDRESS=<hostname> or export API_HOST_ADDRESS=<ip>
export API_PORT=<port>

./entrypoint.sh [OPTIONS] [ARGUMENTS]

Ex. ./entrypoint.sh -i dev || ./entrypoint.sh -i prod || ./entrypoint.sh -h

optional arguments:
    -v, --version       show program's version number and exit
    -l, --local         run the program locally
        --check_time    Time to wait for the certificate to be validated, is optional, if not set, it will be set to **86400**
                        this time is configured in the **settings.yml** file
        --exit          Consult once and exit
    -i, --api           run the program on the API
        dev             run the program locally on the development environment
        prod            run the program on the production environment
    -h, --help          show this help message and exit
"

run local

docker run -d --name certificate_validate_test \
-v <NAME OF VOLUME>:/app/config \
fabianoflorentino/certificate-validate:test --local --check_time

Example:

docker run -d --name certificate_validate_test \
-v certificate-validate:/app/config \
fabianoflorentino/certificate-validate:test --local --check_time

status

CONTAINER ID   IMAGE                                         COMMAND                  CREATED          STATUS          PORTS         NAMES
d33be85a9e6b   fabianoflorentino/certificate-validate:test   "/app/entrypoint.sh …"   27 minutes ago   Up 27 minutes                 certificate_validate_test

run api

dev

docker run -d --name certificate_validate_test \
-p 5000:5000 \
-v <NAME OF VOLUME>:/app/config \
fabianoflorentino/certificate-validate:test --api dev

prod

docker run -d --name certificate_validate_test \
-p 5000:5000 \
-e API_HOST_ADDRESS=<hostname> \
-e API_PORT=<port> \
-v <NAME OF VOLUME>:/app/config \
fabianoflorentino/certificate-validate:test --api prod

Example:

docker run -d --name certificate_validate_test \
-p 5000:5000 \
-v certificate-validate:/app/config \
fabianoflorentino/certificate-validate:test --api dev

OBS: The api option will run the application in api mode, the check_time option will be ignored. Certificate information will be validated on time consult. If you want to validate the certificate periodically, you can use the cron option.

endpoints

endpoints	description
/api/v1/cert/info	Get the certificate informations

output

{
     "commonName": "github.com",
     "subjectAltName": "['github.com', 'www.github.com']",
     "issuer": "DigiCert High Assurance TLS Hybrid ECC SHA256 2020 CA1",
     "type": "Organization Validation (OV) Web Server SSL Digital Certificate",
     "notBefore": "2021-03-25 00:00:00",
     "notAfter": "2022-03-30 23:59:59",
     "daysLeft": "178",
     "crl": "['http://crl3.digicert.com/DigiCertHighAssuranceTLSHybridECCSHA2562020CA1.crl', 'http://crl4.digicert.com/DigiCertHighAssuranceTLSHybridECCSHA2562020CA1.crl']"
}
{
     "commonName": "gitlab.com",
     "subjectAltName": "['gitlab.com', 'auth.gitlab.com', 'customers.gitlab.com', 'email.customers.gitlab.com', 'gprd.gitlab.com', 'www.gitlab.com']",
     "issuer": "Sectigo RSA Domain Validation Secure Server CA",
     "type": "Domain Validation (DV) Web Server SSL Digital Certificate",
     "notBefore": "2021-04-12 00:00:00",
     "notAfter": "2022-05-11 23:59:59",
     "daysLeft": "220",
     "crl": "CRL not found for this certificate!"
}
{
     "commonName": "twitter.com",
     "subjectAltName": "['twitter.com', 'www.twitter.com']",
     "issuer": "DigiCert TLS RSA SHA256 2020 CA1",
     "type": "Organization Validation (OV) Web Server SSL Digital Certificate",
     "notBefore": "2021-02-09 00:00:00",
     "notAfter": "2022-02-07 23:59:59",
     "daysLeft": "127",
     "crl": "['http://crl3.digicert.com/DigiCertTLSRSASHA2562020CA1.crl', 'http://crl4.digicert.com/DigiCertTLSRSASHA2562020CA1.crl']"
}

OBS: Outputs are in json format.

logs

RFC (Request for Comments): Internet X.509 Public Key Infrastructure Certificate and CRL Profile

fields	description
"commonName"	Common Name of the certificate
"subjectAltName"	Subject Alternative Name of the certificate
"issuer"	Issuer of the certificate
"type"	Type of the certificate
"notBefore"	Not Before of the certificate
"notAfter"	Not After of the certificate
"daysLeft"	Days left to expire the certificate
"crl"	Certificate Revocation List of the certificate

OBS: daysLeft is not part of the RFC, it is calculated based on the current date and notAfter field.

docker exec -it <CONTAINER NAME> cat /app/certificate.log

actions

environment	description
DOCKERHUB	Environment configured on Github

Environments

• Creating

variable	description
secrets.DOCKERHUB_USERNAME	Username of the dockerhub account
secrets.DOCKERHUB_TOKEN	Token of the dockerhub account
GITHUB_REPOSITORY	Your GitHub repository needs to have the same name of Dockerhub Repository

• secrets

  "Encrypted secrets allow you to store sensitive information in your organization, repository, or repository environments."

• Workflow syntax for GitHub Actions

  "A workflow is a configurable automated process made up of one or more jobs. You must create a YAML file to define your workflow configuration."

CI

---
name: CI

on:
  push:
    branches:
      - main
    paths-ignore:
      - 'README.md'
      - 'LICENSE'
      - 'docs/**'
      - '.github/**'

jobs:  
  build:
    environment: DOCKERHUB
    name: Build and Push to Docker Hub
    runs-on: ubuntu-latest

    steps:
      # Checkout the repository
      - name: Checkout
        uses: actions/checkout@v2

      # Login to Docker Hub
      - name: Login
        run: docker login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }}

      # Build the image
      - name: Build
        run: |
          docker build \
          --no-cache \
          --rm \
          -t $GITHUB_REPOSITORY:latest \
          -f ./Dockerfile .
      
      # Push the image to Docker Hub
      - name: Push
        run: docker push $GITHUB_REPOSITORY:latest

Pylint

name: Pylint

on:
  push:
    branches:
      - main
    paths-ignore:
      - 'README.md'
      - 'LICENSE'
      - 'docs/**'
      - '.github/**'

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Set up Python 3.9
      uses: actions/setup-python@v2
      with:
        python-version: 3.9
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        python -m pip install -r ./requirements.txt
        pip install pylint
    - name: Analysing the code with pylint
      run: |
        pylint `ls -R|grep .py$|xargs`

CodeQL

name: "CodeQL"

on:
  push:
    branches:
      - main
    paths-ignore:
      - 'README.md'
      - 'LICENSE'
      - 'docs/**'
      - '.github/**'

jobs:
  analyze:
    name: Analyze
    runs-on: ubuntu-latest
    permissions:
      actions: read
      contents: read
      security-events: write

    strategy:
      fail-fast: false
      matrix:
        language: [ 'python' ]

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2

    # Initializes the CodeQL tools for scanning.
    - name: Initialize CodeQL
      uses: github/codeql-action/init@v1
      with:
        languages: ${{ matrix.language }}

    - name: Autobuild
      uses: github/codeql-action/autobuild@v1

    - name: Perform CodeQL Analysis
      uses: github/codeql-action/analyze@v1