@shi-corp/objectid-converter/bin/toObjectId.js

Converts Microsoft Object IDs to and from SIDs.

import { stringify } from 'uuid';
export function convertToObjectId(sid) {
    if (typeof sid !== 'string') {
        throw new Error('The provided sid is not a string!');
    }
    else if (!sid.match(/^S-1-12-1-\d{8,10}-\d{8,10}-\d{8,10}-\d{8,10}$/gum)) {
        throw new Error('The provided SID is not an Entra ID SID!');
    }
    const splitSid = sid.
        replace(/^S-1-12-1-/gum, '').
        split('-').
        map((element) => parseInt(element, 10));
    const sidBuffer = new Uint8Array(new Uint32Array(splitSid).buffer);
    [sidBuffer[0], sidBuffer[3]] = [sidBuffer[3], sidBuffer[0]];
    [sidBuffer[1], sidBuffer[2]] = [sidBuffer[2], sidBuffer[1]];
    [sidBuffer[5], sidBuffer[4]] = [sidBuffer[4], sidBuffer[5]];
    [sidBuffer[7], sidBuffer[6]] = [sidBuffer[6], sidBuffer[7]];
    const objectId = stringify(sidBuffer);
    return objectId;
}