Ghidra: Make json-simple available to scripts

[ryanmkurtz]

Sometimes I want to use JSON in a GhidraScript, but Ghidra only uses json-simple at build time...it is not available at runtime. I think it can be included in Framework Generic.

[astrelsky]

There is the JSONParser although it isn't that fun to use and is not intuitive. This is an example of using it

@SuppressWarnings("unchecked")
public static Map<String, Object> parseJson(String jsonData) throws Exception {
    JSONParser parser = new JSONParser();
    LinkedList<JSONToken> tokens = new LinkedList<>();
    switch (parser.parse(jsonData.toCharArray(), tokens)) {
        case JSMN_ERROR_INVAL:
            throw new Exception("JSON contains invalid character");
        case JSMN_ERROR_NOMEM:
            throw new Exception("Not enough tokens");
        case JSMN_ERROR_PART:
            throw new Exception("Malformed or missing JSON data");
        case JSMN_SUCCESS:
            break;
    }
    return (Map<String, Object>) parser.convert(jsonData.toCharArray(), tokens);
}

The reason for the unchecked conversion to String keys is because the json requires a key to be a string. https://en.wikipedia.org/wiki/JSON#Data_types_and_syntax

[ryanmkurtz]

Didn't know about that...thanks. Is there anything to take a map and produce a JSON string?

[astrelsky]

Didn't know about that...thanks. Is there anything to take a map and produce a JSON string?

Actually I don't think there is. To be honest I would love to see this parser replaced with something much more user friendly.

Of course there are existing alternatives, but none I'd actually recommend. Bad alternative

[ryanmkurtz]

I've used json-simple before (for Ghidra and other things). It's pretty good.

[dragonmacher]

FYI, if you simply wish to turn Java objects to pretty JSON strings, then you can use our new generic.json.Json class's toString() methods.

[ryanmkurtz]

I was looking to go both directions with it.

[revolver-ocelot-saa]

I know this is closed, but just wanted to say thank you for doing this! Adding a way to import GSON saves me from making most of my Ghidra script's into full extensions (since that was the best way to bring that JAR along).

[pabx06]

if i remember well i think i saw google's gson in the path of ghidra 9.2. Pretty handy lib easy to use.
there is always the option to add a jar : via plugin path

[astrelsky]

if i remember well i think i saw google's gson in the path of ghidra 9.2. Pretty handy lib easy to use.
there is always the option to add a jar : via plugin path

Was just about to say this.

Anyone have a simple example for using gson? Python's json has spoiled me rotten.

[dragonmacher]

Anyone have a simple example for using gson? Python's json has spoiled me rotten.

There is a trivial example in the ExportFunctionInfoScript.