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Informations about the package guzzle-web-bot-auth-middleware

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Guzzle Web Bot Auth Middleware (Ed25519 Edition)

A PHP Guzzle middleware for signing HTTP requests using HTTP Message Signatures (RFC 9421), specifically tailored for the web-bot-auth profile as discussed by Cloudflare. This version uses Ed25519 signatures via the libsodium PHP extension.

Requirements

Installation

Install the package via Composer:

Prerequisites & Setup (Ed25519)

To use this middleware, you need an Ed25519 private key, its corresponding public key (in JWK format hosted publicly), and a keyid (JWK Thumbprint of the public key). The middleware uses alg: "eddsa" in the Signature-Input header.

Easiest Setup: All-in-One Ed25519 Key Generation Script

This package includes a utility script to generate everything you need for Ed25519:

  1. Make the script executable (if you haven't already):

  2. Run the script from your project's root directory (or any directory where you want the key files to be saved):

    (Path might vary based on your setup. If installed as a library, it's in vendor/olipayne/guzzle-web-bot-auth-middleware/bin/.)

    The script will:

    • Create ed25519_private.key (containing the base64 encoded Ed25519 private key - KEEP THIS SAFE AND SECRET!).
    • Create ed25519_public.key (containing the base64 encoded Ed25519 public key, for your reference).
    • Output the Base64 Encoded Ed25519 Private Key: You'll pass this (or the path to ed25519_private.key) to the middleware.
    • Output the JWK Thumbprint (kid): This is the keyid for the middleware.
    • Output the Full Ed25519 JWK: This is the JSON structure of your public key to host publicly.

    Example output snippet:

  3. Host Your Public Key (JWKSet) The Signature-Agent header in your requests will point to a URL where the server can fetch your public key (the "Full Ed25519 JWK" from the script) to verify the signature.

    A common practice is https://your-bot.example.com/.well-known/jwks.json. The content of jwks.json should be:

    Ensure this URL is publicly accessible.

Using an Existing Ed25519 Public Key

If you already have a base64 encoded Ed25519 public key and need its JWK and kid:

  1. Make the generate-jwk.php script executable:

  2. Run it with your base64 encoded Ed25519 public key string or the path to a file containing it:

    This will output the kid and the full JWK for your existing public key.

  3. You will need your corresponding Ed25519 private key (base64 encoded) to configure the middleware.
  4. Host the public JWK as described in Step 3 of the "Easiest Setup".

Usage

Provide the base64 encoded Ed25519 private key (or the path to the file like ed25519_private.key), your keyid, and your signatureAgent URL to the middleware.

Covered Components & Algorithm

How it Works

The middleware uses sodium_crypto_sign_detached for Ed25519 signatures. The Signature-Input header includes an alg="eddsa" parameter. The JWK for the public key uses kty: "OKP" (Octet Key Pair) and crv: "Ed25519".

Contributing

Contributions are welcome! Please feel free to submit pull requests or open issues.

License

This package is open-sourced software licensed under the MIT license.

All versions of guzzle-web-bot-auth-middleware with dependencies

PHP Build Version
Package Version
Requires php Version ^7.4 || ^8.0
guzzlehttp/guzzle Version ^7.0
ext-sodium Version *
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