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Jeremy Combs jmcombs

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View fb_appsecret_proof.js
// To secure Facebook Graph API requests:
// - Create a SHA256 hash of your App's Access Token using the App's 'Secret' as the key
// - The hashed value then needs to be added to an 'appsecret_proof' parameter on each Graph API call request
// - Toggle 'Require App Secret' to 'ON' in App dashboard Developer Portal
// Require 'crypto' package as part of Node
const crypto = require('crypto');
// Create HMAC object:
// - Algorithim: 'SHA256'
jmcombs / .editorconfig
Last active Jun 23, 2019
Base Node App with Express using Prettier and ESLint Airbnb Style
View .editorconfig
root = true
indent_style = space
indent_size = 2
end_of_line = lf
charset = utf-8
trim_trailing_whitespae = true
insert_final_newline = true
jmcombs /
Last active Apr 23, 2019
Using `git` and [GitHub]( to create a new Project

Creating a New Git(Hub) Project

These are the steps I follow for:

  • Creating a new project locally on my Mac and on Github
  • Locally initializing the project with npm and git
  • Linking the local and GitHub projects
  • Performing the initial commit
  • Pushing to Github


jmcombs /
Last active Apr 23, 2019
Using `base64` for encoding and decoding on macOS
  • base64 encode:

    This example is for encoding a username and password (You would replace username and password with the actual username and password):

    echo -n 'username:password' | base64

  • base64 decode

    This example is decoding the username and password example above. It can be used to decode any base64 encoded text:

jmcombs /
Last active Oct 14, 2019
Using `openssl` on macOS for various certificate functions
  • Check a CSR:

    Verify the CSR and print CSR data filled in when generating the CSR

    openssl req -verify -in mycsr.csr -noout -text

  • Check a Certificate:

    Check a certificate and return information about it (signing authority, expiration date, etc.):

jmcombs / app.yaml
Last active Apr 17, 2019
Various references for when I am using Google's App Engine for NodeJS
View app.yaml
runtime: nodejs10
- url: /.*
script: auto
secure: always
redirect_http_response_code: 301
DEBUG: "app,app:*"
jmcombs /
Last active Jun 20, 2019
This is for installing NodeJS (which includes NPM) for macOS and properly configuring it for secure use not requiring `sudo`.
  1. Download & Install LTS NodeJS Package from here

  2. Create new Directory for NPM and Global Packages:

    mkdir ~/.npm-packages

  3. Configure NPM to use the new directory:

    npm config set prefix ~/.npm-packages/

  4. Create or Modify ~/.bash_profile or ~/.zshrc and add the following:

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