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cipher

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Elixir crypto library to encrypt/decrypt arbitrary binaries.

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cipher lib cipher digest.ex
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lib/cipher/digest.ex 

defmodule Cipher.Digest do



  @moduledoc """

    Some digesting helpers

  """



  @doc "Generates a suitable key for encryption based on given `phrase`"

  def generate_key(phrase), do: :crypto.hash(:sha, phrase) |> hexdigest |> String.slice(0,16)



  @doc "Generates a suitable iv for encryption based on given `phrase`"

  def generate_iv(phrase), do: phrase |> String.slice(0,16)



  @doc "Gets an usable string from a binary crypto hash"

  def hexdigest(binary) do

    :lists.flatten(for b <- :erlang.binary_to_list(binary), do: :io_lib.format("~2.16.0B", [b]))

    |> :string.to_lower

    |> List.to_string

  end



end