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segrax/opa-php-examples

Examples of using Open Policy Agent (OPA) with the segrax/open-policy-agent library on PHP 7.3.

These examples are pre-configured to work out of the box and contain insecure JWTs / secret-key and must never be reused for any purpose.

The API is setup for xdebug including working @code configuration.

All Examples make use of docker-compose, and executing the steps below will launch multiple contains.

For a walkthrough using these examples please see this tutorial

Includes

• Plain PHP usage of client
• Slim 4 Skeleton API with policy authorization

Usage

Plain PHP

This example can be used for making queries to an instance of OPA.

    cd plain
    make composer-install
    make test

Slim 4 API Authorization

This example demonstrates how to invoke a policy for making a decision on access to a route.

    cd slim4-api
    make start

The containers will now build and be started, by default the API will be listening on port 80. This example serves up policies in a bundle to the running OPA using the Distributor PSR-15 middleware that is included in segrax/open-policy-agent.

A Postman collection is included inside slim4-api, import it and test both endpoints.

This is the policy for the included example endpoint.

package slim.api

default allow = false

# OPA Bundle
allow {
    input.path = ["opa", "bundles", "{name}"]
    input.token.sub == "opa"
}

# Allow a user to access their own private end point
allow {
    input.method == "GET"
    input.path = ["welcome", userid ]
    userid == input.token.sub
}

# Allow anyone (including unauthed) access to the public endpoint
allow {
    input.path = ["public"]
    input.method == "GET"
}