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npm version CircleCI JavaScript Style Guide

A quick'n'dirty library and command line utility to map OpenSSL RFC to machine parseable data.

The data is taken from

💽 Install

As usual in 2018, most of the software is installed through npm, this one makes no difference:

npm install --global openssl-rfc-mapping

Be sure to have node >= 6.0.0.

💾 Precompiled binaries

Alternatively, you can install openssl-rfc-mapping by downloading one of the precompiled executables available for Windows, Linux or Mac in the releases page.

🦔 Usage

openssl-rfc-mapping can be used from command line or programmatically.

💻 Command line usage

Once you have openssl-rfc-mapping installed you will have access to the openssl-rfc-mapping executable (or its alias ssl-rfc-json).

So you just have to run:


And you will get the mapping as a JSON in the standard output. The mapping will be generated in real time by parsing the data available on, so be sure to have internet connection.

⌨️ Programmatic usage

You can easily use the same functionality in your Node.js code as follows:

const getMapping = require('openssl-rfc-mapping')

  .then((data) => console.log(data.mapping))
  .catch((err) => console.error(err))

getMapping returns a promise that resolves to an object that has 2 keys: _meta for metadata and mapping containing the actual mapping to the RFC spec.

The mapping will look like the following dictionary:

  "0x060040": {
    "name": "DES-CBC-MD5",
    "keyExch": "RSA",
    "encryption": "DES",
    "bits": "56",
    "chiperSuiteName": "SSL_CK_DES_64_CBC_WITH_MD5"
  "0x0700c0": {
    "name": "DES-CBC3-MD5",
    "keyExch": "RSA",
    "encryption": "3DES",
    "bits": "168",
    "chiperSuiteName": "SSL_CK_DES_192_EDE3_CBC_WITH_MD5"
  "0x080080": {
    "name": "RC4-64-MD5",
    "keyExch": "RSA",
    "encryption": "RC4",
    "bits": "64",
    "chiperSuiteName": "SSL_CK_RC4_64_WITH_MD5"

getMapping will parse the source website in real time, every time you invoke it. If you want a pre-compiled static version of it, you can import a mapping file that is generated everytime a new version of this project is published on NPM:

const data = require('openssl-rfc-mapping/src/mapping.json')

// do stuff with data._meta and data.mapping

👯‍ Contributing

Everyone is very welcome to contribute to this project. You can contribute just by submitting bugs or suggesting improvements by opening an issue on GitHub.

🤦‍ License

Licensed under MIT License. © Luciano Mammino.