56 lines
1.9 KiB
Elixir
56 lines
1.9 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Signature do
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@behaviour HTTPSignatures.Adapter
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alias Pleroma.User
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alias Pleroma.User.SigningKey
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require Logger
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def fetch_public_key(conn) do
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with {_, %{"keyId" => kid}} <- {:keyid, HTTPSignatures.signature_for_conn(conn)},
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{_, {:ok, %SigningKey{} = sk}, _} <-
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{:fetch, SigningKey.get_or_fetch_by_key_id(kid), kid},
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{_, {:ok, decoded_key}} <- {:decode, SigningKey.public_key_decoded(sk)} do
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{:ok, decoded_key}
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else
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{:fetch, error, kid} ->
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Logger.error("Failed to acquire key from signature: #{kid} #{inspect(error)}")
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{:error, {:fetch, error}}
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e ->
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{:error, e}
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end
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end
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def refetch_public_key(conn) do
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with {_, %{"keyId" => kid}} <- {:keyid, HTTPSignatures.signature_for_conn(conn)},
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# TODO: force a refetch of stale keys (perhaps with a backoff time based on updated_at)
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{_, {:ok, %SigningKey{} = sk}, _} <-
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{:fetch, SigningKey.get_or_fetch_by_key_id(kid), kid},
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{_, {:ok, decoded_key}} <- {:decode, SigningKey.public_key_decoded(sk)} do
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{:ok, decoded_key}
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else
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{:fetch, error, kid} ->
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Logger.error("Failed to refresh stale key from signature: #{kid} #{inspect(error)}")
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{:error, {:fetch, error}}
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e ->
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{:error, e}
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end
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end
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def sign(%User{} = user, headers) do
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with {:ok, private_key} <- SigningKey.private_key(user) do
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HTTPSignatures.sign(private_key, SigningKey.local_key_id(user.ap_id), headers)
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end
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end
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def signed_date, do: signed_date(NaiveDateTime.utc_now())
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def signed_date(%NaiveDateTime{} = date) do
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Timex.lformat!(date, "{WDshort}, {0D} {Mshort} {YYYY} {h24}:{m}:{s} GMT", "en")
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end
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end
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