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ex_secrets

0.3.6
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Provider secrets to your app from .env, Azure KeyVault, Azure Managed Identity, Google Secret Manager.

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ex_secrets lib aws_secrets_manager signatures.ex
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lib/aws_secrets_manager/signatures.ex 

defmodule ExSecrets.AwsSecretsManager.Signatures do

  @moduledoc false

  import ExSecrets.AwsSecretsManager.Auth.Utils, only: [hmac_sha256: 2, date: 1, bytes_to_hex: 1]



  def generate_signature_v4(service, config, datetime, string_to_sign) do

    service

    |> signing_key(datetime, config)

    |> hmac_sha256(string_to_sign)

    |> bytes_to_hex

  end



  defp signing_key(service, datetime, config) do

    ["AWS4", config[:secret_access_key]]

    |> hmac_sha256(date(datetime))

    |> hmac_sha256(config[:region])

    |> hmac_sha256(service)

    |> hmac_sha256("aws4_request")

  end

end