Setup

Installation

1. Download the Open Policy Agent as described here.

2. Set the permissions of the downloaded file to allow execution:

chmod 755 ./opa

Path Configuration

1. Move the downloaded executable to a location in your system's PATH to make it accessible from any directory. A common location for custom binaries on macOS is ~/.local/bin. You can move it there with the following command:

mv opa ~/.local/bin/opa

Verify Setup

1. Test the setup by running a simple expression with OPA:

opa eval "1*2+3"

1. If everything is working correctly, you should see output like this:

{
   "result": [
      {
         "expressions": [
            {
               "value": 5,
               "text": "1*2+3",
               "location": {
                  "row": 1,
                  "col": 1
               }
            }
         ]
      }
   ]
}

Next Steps

1. Creating a dynamic policy

2. Verifying a verifiable credential using a dynamic policy