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lib/livebook/zta.ex
defmodule Livebook.ZTA do
@type name :: atom()
@typedoc """
A metadata of keys returned by zero-trust authentication provider.
The following keys are supported:
* `:id` - a string that uniquely identifies the user
* `:name` - the user name
* `:email` - the user email
* `:payload` - the provider payload
Note that none of the keys are required. The metadata returned depends
on the provider.
"""
@type metadata :: %{
optional(:id) => String.t(),
optional(:name) => String.t(),
optional(:email) => String.t(),
optional(:payload) => map()
}
@doc """
Each provider must specify a child specification for its processes.
The `:name` and `:identity_key` keys are expected.
"""
@callback child_spec(name: name(), identity_key: String.t()) :: Supervisor.child_spec()
@doc """
Authenticates against the given name.
It will return one of:
* `{non_halted_conn, nil}` - the authentication failed and you must
halt the connection and render the appropriate report
* `{halted_conn, nil}` - the authentication failed and the connection
was modified accordingly to request the credentials
* `{non_halted_conn, metadata}` - the authentication succeed and the
following metadata about the user is available
"""
@callback authenticate(name(), Plug.Conn.t(), keyword()) :: {Plug.Conn.t(), metadata() | nil}
@doc false
def init do
:ets.new(__MODULE__, [:named_table, :public, :set, read_concurrency: true])
end
def get(name) do
:ets.lookup_element(__MODULE__, name, 2)
end
def put(name, value) do
:ets.insert(__MODULE__, [{name, value}])
end
def provider_name(nil), do: "None"
def provider_name(provider_type) do
Livebook.Config.zta_metadata(provider_type).name
end
end