Silent privilege escalation in Swift (password is needed)

sudo.swift

import Foundation

/// Run a command as root.
@MainActor // This *will* hang if it is not run on the main thread.
func sudo(_ command: String, username: String = NSUserName(), password: String) throws -> String? {
    guard
        let script = NSAppleScript(
            source:
                """
                do shell script "\(command)" user name "\(username)" password "\(password)" with administrator privileges
                """
        ),
        script.compileAndReturnError(nil),
        // The return value of this function is documented wrong, so we must cast it to the correct type.
        let descriptor = script.executeAndReturnError(nil) as NSAppleEventDescriptor?,
        let returnedString = descriptor.stringValue
    else { return nil }
    return returnedString
}

To run this from anywhere (even a function not in the main thread) you can do something like this:

Task.detached { @MainActor in
    let answer = try sudo("whoami", password: "hunter2")
    print(answer)
}