How to generate RSA keypair in versions before iOS 10?

[kpavankotesh]

• Version of SwiftyRSA in Podfile/Cartfile

  - SwiftyRSA (1.5.0):
    - SwiftyRSA/ObjC (= 1.5.0)
  - SwiftyRSA/ObjC (1.5.0)

• Exact code that you're using to create the key / message / signature

  func generateKeyPair() {
    do {
      if #available(iOS 10.0, *) {
        let keyPair = try! SwiftyRSA.generateRSAKeyPair(sizeInBits: 2048)
      } else {
        // Fallback on earlier versions
      }
      let privateKey = keyPair.privateKey
      let publicKey = keyPair.publicKey
    } catch {
      print(error)
    } 
  }

• Question? How do I use this library to generate the key pair in earlier versions of iOS before iOS 10? The fallback code for earlier versions?