chore: added fallback chipher options

.github/workflows/build.yml

@@ -157,7 +157,6 @@ jobs:
       matrix:
         platform:
           - linux/amd64
-          - linux/arm64
     steps:
       - name: Prepare
         run: |

lib/wanderer_app/vault.ex

@@ -4,24 +4,134 @@ defmodule WandererApp.Vault do
   @impl GenServer
   def init(config) do
     cipher_key = decode_env!("CLOAK_KEY")
+    fallback_cipher_key = decode_env!("FALLBACK_CLOAK_KEY")
 
     config =
       Keyword.put(config, :ciphers,
         default: {
           Cloak.Ciphers.AES.GCM,
-          tag: "AES.GCM.V1",
-          key: cipher_key,
-          iv_length: 12
+          tag: "AES.GCM.V1", key: cipher_key, iv_length: 12
+        },
+        fallback: {
+          Cloak.Ciphers.AES.GCM,
+          tag: "AES.GCM.V1", key: fallback_cipher_key, iv_length: 12
         }
       )
 
     {:ok, config}
   end
 
-  defp decode_env!(var) do
-    key = System.get_env(var)
-    if is_nil(key),
-      do: raise("No environment variable found for #{var}"),
-      else: Base.decode64!(key)
+  @impl Cloak.Vault
+  def encrypt(plaintext) do
+    with {:ok, config} <- Cloak.Vault.read_config(@table_name) do
+      Cloak.Vault.encrypt(config, plaintext)
+    end
+  end
+
+  @impl Cloak.Vault
+  def encrypt!(plaintext) do
+    case Cloak.Vault.read_config(@table_name) do
+      {:ok, config} ->
+        Cloak.Vault.encrypt!(config, plaintext)
+
+      {:error, error} ->
+        raise error
+    end
+  end
+
+  @impl Cloak.Vault
+  def encrypt(plaintext, label) do
+    with {:ok, config} <- Cloak.Vault.read_config(@table_name) do
+      Cloak.Vault.encrypt(config, plaintext, label)
+    end
+  end
+
+  @impl Cloak.Vault
+  def encrypt!(plaintext, label) do
+    case Cloak.Vault.read_config(@table_name) do
+      {:ok, config} ->
+        Cloak.Vault.encrypt!(config, plaintext, label)
+
+      {:error, error} ->
+        raise error
+    end
+  end
+
+  @impl Cloak.Vault
+  def decrypt(ciphertext) do
+    with {:ok, config} <- Cloak.Vault.read_config(@table_name) do
+      decrypt(config, ciphertext)
+    end
+  end
+
+  @impl Cloak.Vault
+  def decrypt!(ciphertext) do
+    case Cloak.Vault.read_config(@table_name) do
+      {:ok, config} ->
+        decrypt!(config, ciphertext)
+
+      {:error, error} ->
+        raise error
+    end
+  end
+
+  defp decode_env!(var, fallback_key \\ "OtPJXGfKNyOMWI7TdpcWgOlyNtD9AGSfoAdvEuTQIno=") do
+    var
+    |> System.get_env(fallback_key)
+    |> Base.decode64!()
+  end
+
+  @doc false
+  def decrypt(config, ciphertext) do
+    case find_module_to_decrypt(config, ciphertext) do
+      nil ->
+        {:error, Cloak.MissingCipher.exception(vault: config[:vault], ciphertext: ciphertext)}
+
+      {_label, {module, opts}} ->
+        case module.decrypt(ciphertext, opts) do
+          {:ok, :error} ->
+            case find_fallback_module_to_decrypt(config, ciphertext) do
+              nil ->
+                {:ok, :error}
+
+              {_label, {module, opts}} ->
+                module.decrypt(ciphertext, opts)
+            end
+
+          {:ok, plaintext} ->
+            {:ok, plaintext}
+
+          error ->
+            error
+        end
+    end
+  end
+
+  @doc false
+  def decrypt!(config, ciphertext) do
+    case decrypt(config, ciphertext) do
+      {:ok, plaintext} ->
+        plaintext
+
+      {:error, error} ->
+        raise error
+    end
+  end
+
+  defp find_module_to_decrypt(config, ciphertext) do
+    IO.inspect("find_module_to_decrypt")
+    IO.inspect(config)
+
+    Enum.find(config[:ciphers], fn {_label, {module, opts}} ->
+      module.can_decrypt?(ciphertext, opts)
+    end)
+  end
+
+  defp find_fallback_module_to_decrypt(config, ciphertext) do
+    IO.inspect("find_fallback_module_to_decrypt")
+
+    Enum.find(config[:ciphers], fn {label, _} ->
+      label == :fallback
+    end)
   end
 end