Refactoring of Actors context

lib/mobilizon/crypto.ex

@@ -12,4 +12,17 @@ defmodule Mobilizon.Crypto do
     |> :crypto.strong_rand_bytes()
     |> Base.url_encode64()
   end
+
+  @doc """
+  Generate RSA 2048-bit private key.
+  """
+  @spec generate_rsa_2048_private_key :: String.t()
+  def generate_rsa_2048_private_key do
+    key = :public_key.generate_key({:rsa, 2048, 65_537})
+    entry = :public_key.pem_entry_encode(:RSAPrivateKey, key)
+
+    [entry]
+    |> :public_key.pem_encode()
+    |> String.trim_trailing()
+  end
 end