+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Web.Salmon do
@httpoison Application.get_env(:pleroma, :httpoison)
use Bitwise
+
+ alias Pleroma.Instances
+ alias Pleroma.User
alias Pleroma.Web.XML
alias Pleroma.Web.OStatus.ActivityRepresenter
- alias Pleroma.User
+
require Logger
def decode(salmon) do
with [data, _, _, _, _] <- decode(salmon),
doc <- XML.parse_document(data),
uri when not is_nil(uri) <- XML.string_from_xpath("/entry/author[1]/uri", doc),
- {:ok, %{info: %{"magic_key" => magic_key}}} <- Pleroma.Web.OStatus.find_or_make_user(uri) do
+ {:ok, public_key} <- User.get_public_key_for_ap_id(uri),
+ magic_key <- encode_key(public_key) do
{:ok, magic_key}
end
end
def decode_and_validate(magickey, salmon) do
[data, type, encoding, alg, sig] = decode(salmon)
- signed_text = [data, type, encoding, alg]
- |> Enum.map(&Base.url_encode64/1)
- |> Enum.join(".")
+ signed_text =
+ [data, type, encoding, alg]
+ |> Enum.map(&Base.url_encode64/1)
+ |> Enum.join(".")
key = decode_key(magickey)
end
def decode_key("RSA." <> magickey) do
- make_integer = fn(bin) ->
+ make_integer = fn bin ->
list = :erlang.binary_to_list(bin)
- Enum.reduce(list, 0, fn (el, acc) -> (acc <<< 8) ||| el end)
+ Enum.reduce(list, 0, fn el, acc -> acc <<< 8 ||| el end)
end
- [modulus, exponent] = magickey
- |> String.split(".")
- |> Enum.map(fn (n) -> Base.url_decode64!(n, padding: false) end)
- |> Enum.map(make_integer)
+ [modulus, exponent] =
+ magickey
+ |> String.split(".")
+ |> Enum.map(fn n -> Base.url_decode64!(n, padding: false) end)
+ |> Enum.map(make_integer)
{:RSAPublicKey, modulus, exponent}
end
def encode_key({:RSAPublicKey, modulus, exponent}) do
- modulus_enc = :binary.encode_unsigned(modulus) |> Base.url_encode64
- exponent_enc = :binary.encode_unsigned(exponent) |> Base.url_encode64
+ modulus_enc = :binary.encode_unsigned(modulus) |> Base.url_encode64()
+ exponent_enc = :binary.encode_unsigned(exponent) |> Base.url_encode64()
"RSA.#{modulus_enc}.#{exponent_enc}"
end
# We try at compile time to generate natively an RSA key otherwise we fallback on the old way.
try do
_ = :public_key.generate_key({:rsa, 2048, 65537})
+
def generate_rsa_pem do
key = :public_key.generate_key({:rsa, 2048, 65537})
entry = :public_key.pem_entry_encode(:RSAPrivateKey, key)
- pem = :public_key.pem_encode([entry]) |> String.trim_trailing
+ pem = :public_key.pem_encode([entry]) |> String.trim_trailing()
{:ok, pem}
end
rescue
_ ->
def generate_rsa_pem do
port = Port.open({:spawn, "openssl genrsa"}, [:binary])
- {:ok, pem} = receive do
- {^port, {:data, pem}} -> {:ok, pem}
- end
+
+ {:ok, pem} =
+ receive do
+ {^port, {:data, pem}} -> {:ok, pem}
+ end
+
Port.close(port)
+
if Regex.match?(~r/RSA PRIVATE KEY/, pem) do
{:ok, pem}
else
encoding = "base64url"
alg = "RSA-SHA256"
- signed_text = [doc, type, encoding, alg]
- |> Enum.map(&Base.url_encode64/1)
- |> Enum.join(".")
+ signed_text =
+ [doc, type, encoding, alg]
+ |> Enum.map(&Base.url_encode64/1)
+ |> Enum.join(".")
- signature = signed_text
- |> :public_key.sign(:sha256, private_key)
- |> to_string
- |> Base.url_encode64
+ signature =
+ signed_text
+ |> :public_key.sign(:sha256, private_key)
+ |> to_string
+ |> Base.url_encode64()
- doc_base64 = doc
- |> Base.url_encode64
+ doc_base64 =
+ doc
+ |> Base.url_encode64()
# Don't need proper xml building, these strings are safe to leave unescaped
salmon = """
{:ok, salmon}
end
- def remote_users(%{data: %{"to" => to}}) do
+ def remote_users(%{data: %{"to" => to} = data}) do
+ to = to ++ (data["cc"] || [])
+
to
- |> Enum.map(fn(id) -> User.get_cached_by_ap_id(id) end)
- |> Enum.filter(fn(user) -> user && !user.local end)
+ |> Enum.map(fn id -> User.get_cached_by_ap_id(id) end)
+ |> Enum.filter(fn user -> user && !user.local end)
end
- defp send_to_user(%{info: %{"salmon" => salmon}}, feed, poster) do
- with {:ok, %{status_code: code}} <- poster.(salmon, feed, [{"Content-Type", "application/magic-envelope+xml"}], timeout: 10000, recv_timeout: 20000) do
- Logger.debug(fn -> "Pushed to #{salmon}, code #{code}" end)
+ @doc "Pushes an activity to remote account."
+ def send_to_user(%{recipient: %{info: %{salmon: salmon}}} = params),
+ do: send_to_user(Map.put(params, :recipient, salmon))
+
+ def send_to_user(%{recipient: url, feed: feed, poster: poster} = params) when is_binary(url) do
+ with {:ok, %{status: code}} when code in 200..299 <-
+ poster.(
+ url,
+ feed,
+ [{"Content-Type", "application/magic-envelope+xml"}]
+ ) do
+ if !Map.has_key?(params, :unreachable_since) || params[:unreachable_since],
+ do: Instances.set_reachable(url)
+
+ Logger.debug(fn -> "Pushed to #{url}, code #{code}" end)
+ :ok
else
- e -> Logger.debug(fn -> "Pushing salmon to #{salmon} failed, #{inspect(e)}" end)
+ e ->
+ unless params[:unreachable_since], do: Instances.set_reachable(url)
+ Logger.debug(fn -> "Pushing Salmon to #{url} failed, #{inspect(e)}" end)
+ :error
end
end
- defp send_to_user(_,_,_), do: nil
+ def send_to_user(_), do: :noop
@supported_activities [
"Create",
"Undo",
"Delete"
]
- def publish(user, activity, poster \\ &@httpoison.post/4)
- def publish(%{info: %{"keys" => keys}} = user, %{data: %{"type" => type}} = activity, poster) when type in @supported_activities do
+
+ @doc """
+ Publishes an activity to remote accounts
+ """
+ @spec publish(User.t(), Pleroma.Activity.t(), Pleroma.HTTP.t()) :: none
+ def publish(user, activity, poster \\ &@httpoison.post/3)
+
+ def publish(%{info: %{keys: keys}} = user, %{data: %{"type" => type}} = activity, poster)
+ when type in @supported_activities do
feed = ActivityRepresenter.to_simple_form(activity, user, true)
- |> ActivityRepresenter.wrap_with_entry
- |> :xmerl.export_simple(:xmerl_xml)
- |> to_string
if feed do
+ feed =
+ ActivityRepresenter.wrap_with_entry(feed)
+ |> :xmerl.export_simple(:xmerl_xml)
+ |> to_string
+
{:ok, private, _} = keys_from_pem(keys)
{:ok, feed} = encode(private, feed)
- remote_users(activity)
- |> Enum.each(fn(remote_user) ->
- Task.start(fn ->
- Logger.debug(fn -> "sending salmon to #{remote_user.ap_id}" end)
- send_to_user(remote_user, feed, poster)
- end)
+ remote_users = remote_users(activity)
+
+ salmon_urls = Enum.map(remote_users, & &1.info.salmon)
+ reachable_urls_metadata = Instances.filter_reachable(salmon_urls)
+ reachable_urls = Map.keys(reachable_urls_metadata)
+
+ remote_users
+ |> Enum.filter(&(&1.info.salmon in reachable_urls))
+ |> Enum.each(fn remote_user ->
+ Logger.debug(fn -> "Sending Salmon to #{remote_user.ap_id}" end)
+
+ Pleroma.Web.Federator.publish_single_salmon(%{
+ recipient: remote_user,
+ feed: feed,
+ poster: poster,
+ unreachable_since: reachable_urls_metadata[remote_user.info.salmon]
+ })
end)
end
end
projects / akkoma / blobdiff