def createKey()

in src/main/scala/com/gu/ssm/SSH.scala [15:39]

• 22 lines of code
• 5 McCabe index (conditional complexity)

  def createKey(): Either[FailedAttempt, (File, String)] = {

    // Write key to file.
    val prefix = "security_ssm-scala_temporary-rsa-private-key"
    val suffix = ".tmp"
    val keyAlgorithm = "RSA"
    val keyProvider = "BC"

    try {
      val privateKeyFile = File.createTempFile(prefix, suffix, new File(System.getProperty("java.io.tmpdir")))
      FilePermissions(privateKeyFile, "0600")
      val publicKey = KeyMaker.makeKey(privateKeyFile, keyAlgorithm, keyProvider)
      Right((privateKeyFile, publicKey))
    } catch {
      case e:IOException => Left(FailedAttempt(
        Failure(s"Unable to create private key file", "Error creating key on disk", UnhandledError, e)
      ))
      case e:NoSuchAlgorithmException => Left(FailedAttempt(
        Failure(s"Unable to create key pair with algorithm $keyAlgorithm", s"Error creating key with algorithm $keyAlgorithm", UnhandledError, e)
      ))
      case e:NoSuchProviderException => Left(FailedAttempt(
        Failure(s"Unable to create key pair with provider $keyProvider", s"Error creating key with provider $keyProvider", UnhandledError, e)
      ))
    }
  }