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feat: authenticate users via API key
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| defmodule ArrowWeb.TryApiTokenAuth.Cognito do | ||
| @moduledoc """ | ||
| Signs in an API client via Cognito. | ||
| """ | ||
|
|
||
| require Logger | ||
|
|
||
| @aws_cognito_target "AWSCognitoIdentityProviderService" | ||
| @cognito_groups Application.compile_env!(:arrow, :cognito_groups) | ||
|
|
||
| def sign_in(conn, auth_token) do | ||
| user_pool_id = | ||
| :ueberauth | ||
| |> Application.get_env(Ueberauth.Strategy.Cognito) | ||
| |> Keyword.get(:user_pool_id) | ||
| |> config_value | ||
|
|
||
| data = %{ | ||
| "Username" => auth_token.username, | ||
| "UserPoolId" => user_pool_id | ||
| } | ||
|
|
||
| headers = [ | ||
| {"x-amz-target", "#{@aws_cognito_target}.AdminListGroupsForUser"}, | ||
| {"content-type", "application/x-amz-json-1.1"} | ||
| ] | ||
|
|
||
| operation = ExAws.Operation.JSON.new(:"cognito-idp", data: data, headers: headers) | ||
|
|
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| {module, function} = Application.get_env(:arrow, :ex_aws_requester) | ||
|
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| roles = | ||
| case apply(module, function, [operation]) do | ||
| {:ok, %{"Groups" => groups}} -> | ||
| for %{"GroupName" => group} <- groups, | ||
| {:ok, role} <- [Map.fetch(@cognito_groups, group)] do | ||
| role | ||
| end | ||
|
|
||
| response -> | ||
| :ok = Logger.warn("unexpected_aws_api_response: #{inspect(response)}") | ||
| [] | ||
| end | ||
|
|
||
| conn | ||
| |> Guardian.Plug.sign_in( | ||
| ArrowWeb.AuthManager, | ||
| auth_token.username, | ||
| %{roles: roles} | ||
| ) | ||
| end | ||
|
|
||
| @spec config_value(binary() | {module(), atom(), [any()]}) :: any() | ||
| defp config_value(value) when is_binary(value), do: value | ||
| defp config_value({m, f, a}), do: apply(m, f, a) | ||
| end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| defmodule ArrowWeb.TryApiTokenAuth.Keycloak do | ||
| @moduledoc """ | ||
| Signs in an API client via Keycloak. | ||
| """ | ||
|
|
||
| require Logger | ||
|
|
||
| def sign_in(conn, auth_token) do | ||
| with {:ok, user_id} <- lookup_user_id(auth_token.username), | ||
| {:ok, roles} <- lookup_user_roles(user_id) do | ||
| conn | ||
| |> Guardian.Plug.sign_in( | ||
| ArrowWeb.AuthManager, | ||
| auth_token.username, | ||
| %{roles: roles} | ||
| ) | ||
| else | ||
| other -> | ||
| Logger.warn( | ||
| "unexpected response when logging #{auth_token.username} in via Keycloak API: #{inspect(other)}" | ||
| ) | ||
|
|
||
| conn | ||
| end | ||
| end | ||
|
|
||
| defp lookup_user_id(email) do | ||
| case keycloak_api("users", %{ | ||
| max: 1, | ||
| email: String.downcase(email), | ||
| exact: true, | ||
| briefRepresentation: true | ||
| }) do | ||
| {:ok, [%{"id" => user_id}]} -> | ||
| {:ok, user_id} | ||
|
|
||
| {:ok, []} -> | ||
| {:error, :no_users} | ||
|
|
||
| {:ok, [_, _ | _]} -> | ||
| {:error, :multiple_users} | ||
|
|
||
| e -> | ||
| e | ||
| end | ||
| end | ||
|
|
||
| defp lookup_user_roles(user_id) do | ||
| client_uuid = Application.get_env(:arrow, :keycloak_client_uuid) | ||
| url = "users/#{user_id}/role-mappings/clients/#{client_uuid}/composite" | ||
|
|
||
| case keycloak_api(url) do | ||
| {:ok, response} -> | ||
| roles = for r <- response, do: r["name"] | ||
| {:ok, roles} | ||
|
|
||
| e -> | ||
| e | ||
| end | ||
| end | ||
|
|
||
| defp keycloak_api(url, params \\ %{}) do | ||
| base_url = Application.get_env(:arrow, :keycloak_api_base) | ||
| opts = Map.new(Application.get_env(:ueberauth, Ueberauth.Strategy.OIDC)[:keycloak]) | ||
|
|
||
| with {:ok, tokens} <- | ||
| OpenIDConnect.fetch_tokens(opts, %{grant_type: "client_credentials", scope: "openid"}), | ||
| headers = [{"authorization", "#{tokens["token_type"]} #{tokens["access_token"]}"}], | ||
| {:ok, %{status_code: 200} = response} <- | ||
| HTTPoison.get("#{base_url}#{url}", headers, params: params) do | ||
| Jason.decode(response.body) | ||
| else | ||
| {:ok, %{status_code: _} = response} -> {:error, response} | ||
| e -> e | ||
| end | ||
| end | ||
| end |
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