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relyra

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Strict-by-default SAML 2.0 Service Provider library for Elixir and Phoenix.

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relyra lib relyra security xml attribute_escape.ex
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lib/relyra/security/xml/attribute_escape.ex 

defmodule Relyra.Security.XML.AttributeEscape do

  @moduledoc """

  Escapes a string for use in an XML attribute value per Exclusive C14N rules.



  Mirrors the replacements in `Relyra.Security.XML.C14n` private `escape_attr/1`

  without coupling callers to C14n internals.

  """



  @spec escape_attribute(term()) :: binary()

  def escape_attribute(value) when is_binary(value) do

    value

    |> :binary.replace("&", "&", [:global])

    |> :binary.replace("<", "&lt;", [:global])

    |> :binary.replace("\"", "&quot;", [:global])

    |> :binary.replace("\t", "&#x9;", [:global])

    |> :binary.replace("\n", "&#xA;", [:global])

    |> :binary.replace("\r", "&#xD;", [:global])

  end



  def escape_attribute(_), do: ""

end