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mongodb_driver

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The MongoDB driver for Elixir

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mongodb_driver lib mongo auth plain.ex
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lib/mongo/auth/plain.ex 

defmodule Mongo.Auth.PLAIN do

  @moduledoc false

  alias Mongo.MongoDBConnection.Utils



  def auth({nil, nil}, _s) do

    :ok

  end



  def auth({username, password}, s) do

    auth_payload = build_auth_payload(username, password)

    message = [saslStart: 1, mechanism: "PLAIN", payload: auth_payload]



    case Utils.command(-3, message, s) do

      {:ok, _flags, %{"ok" => ok, "done" => true}} when ok == 1 ->

        :ok



      {:ok, _flags, %{"ok" => ok, "errmsg" => reason, "code" => code}} when ok == 0 ->

        {:error, Mongo.Error.exception(message: "auth failed for user #{username}: #{reason}", code: code)}



      error ->

        error

    end

  end



  defp build_auth_payload(username, password) do

    # https://www.ietf.org/rfc/rfc4616.txt

    # Null separate listed of authorization ID (blank), username, password. These are sent as raw UTF-8.

    payload = "\0#{username}\0#{password}"

    %BSON.Binary{binary: payload}

  end

end