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codex_sdk

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Idiomatic Elixir SDK for OpenAI's Codex agent. Provides a complete, production-ready interface with streaming support, comprehensive event handling, and robust testing utilities.

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codex_sdk lib codex oauth pkce.ex
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lib/codex/oauth/pkce.ex 

defmodule Codex.OAuth.PKCE do

  @moduledoc false



  @enforce_keys [:verifier, :challenge, :method]

  defstruct [:verifier, :challenge, :method]



  @type t :: %__MODULE__{

          verifier: String.t(),

          challenge: String.t(),

          method: String.t()

        }



  @verifier_bytes 48

  @challenge_method "S256"



  @spec generate() :: t()

  def generate do

    verifier = generate_verifier()



    %__MODULE__{

      verifier: verifier,

      challenge: challenge(verifier),

      method: @challenge_method

    }

  end



  @spec generate_verifier() :: String.t()

  def generate_verifier do

    @verifier_bytes

    |> :crypto.strong_rand_bytes()

    |> Base.url_encode64(padding: false)

  end



  @spec challenge(String.t()) :: String.t()

  def challenge(verifier) when is_binary(verifier) do

    verifier

    |> then(&:crypto.hash(:sha256, &1))

    |> Base.url_encode64(padding: false)

  end

end