I'm trying to implement Yao's Millionaires' Problem algorithm in Swift and am hitting a snag.

To implement this algorithm, I need to generate an RSA private key and get `n` and `d`.

So far, I've created the key like this:

```
import Security
import Foundation

let tag = "com.example.keys.mykey".data(using: .utf8)!
let attributes: [String: Any] = [kSecAttrKeyType as String: kSecAttrKeyTypeRSA,
    kSecAttrKeySizeInBits as String: 1024,
    kSecPrivateKeyAttrs as String:
        [kSecAttrIsPermanent as String: false,
        kSecAttrApplicationTag as String: tag]
]

var error: Unmanaged<CFError>?
guard let privateKey = SecKeyCreateRandomKey(attributes as CFDictionary, &error) else {
    throw error!.takeRetainedValue() as Error
}

```

`privateKey` seems to be of type `SecKey` but I can't figure out how to get `n` and `d` out of it.

How can I generate an RSA private key and get the `n` and `d` values?