28 lines
881 B
Elixir
28 lines
881 B
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.Plugs.DigestPlug do
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alias Plug.Conn
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require Logger
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def read_body(conn, opts) do
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digest_algorithm =
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with [digest_header] <- Conn.get_req_header(conn, "digest") do
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digest_header
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|> String.split("=", parts: 2)
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|> List.first()
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else
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_ -> "SHA-256"
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end
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unless String.downcase(digest_algorithm) == "sha-256" do
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raise ArgumentError,
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message: "invalid value for digest algorithm, got: #{digest_algorithm}"
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end
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{:ok, body, conn} = Conn.read_body(conn, opts)
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encoded_digest = :crypto.hash(:sha256, body) |> Base.encode64()
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{:ok, body, Conn.assign(conn, :digest, "#{digest_algorithm}=#{encoded_digest}")}
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end
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end
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