OCSF Types for Rust

Strongly typed Rust structs for the OCSF

This crate provides native Rust types for OCSF events, objects, and enums. It is generated programmatically from the official OCSF schema. It uses the official python OCSF compile tool to first create a flattened JSON schema then use serde to parse it.

The goal of this project is to provide an easy, safe interface that fully matches the OCSF specifications.

Usage

Add this to your Cargo.toml:

[dependencies]

ocsf-types = "0.2.0"

Example

Here is how you may use this package:

use ocsf_types::AccountChange;
let event = {
    let mut e = AccountChange::default();
    e.activity_id = Some(1);
    // You should ensure that all required fields are entered
    e
};
let serialized = serde.json::to_string(&event).ok();

let event_2 = serde_json::from_value(
    serde_json::json!({"activity_id":1})
).ok();

Development

If you are interested in building this from scratch or contributing.

Requirements

• git
• rust
• python ^3.13 with ocsf-lib

Building

git submodule update --init --recursive

pip install ocsf-lib

python -m ocsf.compile ocsf-schema/ > src/resolved.json

cargo run --example generate

cargo build

Note - if generate.rs is failing, make sure there exists a src/ocsf_generated.rs file

Notes

We currently ignore data if it is unknown and not mapped to any fields. This may result in data loss, but abides by the OCSF standards. Any data not in a field which should be saved, should be tied to the unmapped field by the client.

We do not validate fields, yet. Someone may put in severity_id:-1 which we would parse without error.