defmodule Pleroma.Web.Salmon do
+ @httpoison Application.get_env(:pleroma, :httpoison)
+
use Bitwise
+ alias Pleroma.Web.XML
+ alias Pleroma.Web.OStatus.ActivityRepresenter
+ alias Pleroma.User
+ require Logger
def decode(salmon) do
- {doc, _rest} = :xmerl_scan.string(to_charlist(salmon))
+ doc = XML.parse_document(salmon)
{:xmlObj, :string, data} = :xmerl_xpath.string('string(//me:data[1])', doc)
{:xmlObj, :string, sig} = :xmerl_xpath.string('string(//me:sig[1])', doc)
{:xmlObj, :string, encoding} = :xmerl_xpath.string('string(//me:encoding[1])', doc)
{:xmlObj, :string, type} = :xmerl_xpath.string('string(//me:data[1]/@type)', doc)
-
{:ok, data} = Base.url_decode64(to_string(data), ignore: :whitespace)
{:ok, sig} = Base.url_decode64(to_string(sig), ignore: :whitespace)
alg = to_string(alg)
end
def fetch_magic_key(salmon) do
- [data, _, _, _, _] = decode(salmon)
- {doc, _rest} = :xmerl_scan.string(to_charlist(data))
- {:xmlObj, :string, uri} = :xmerl_xpath.string('string(//author[1]/uri)', doc)
-
- uri = to_string(uri)
- base = URI.parse(uri).host
-
- # TODO: Find out if this endpoint is mandated by the standard.
- {:ok, response} = HTTPoison.get(base <> "/.well-known/webfinger", ["Accept": "application/xrd+xml"], [params: [resource: uri]])
-
- {doc, _rest} = :xmerl_scan.string(to_charlist(response.body))
-
- {:xmlObj, :string, magickey} = :xmerl_xpath.string('string(//Link[@rel="magic-public-key"]/@href)', doc)
- "data:application/magic-public-key," <> magickey = to_string(magickey)
-
- magickey
+ 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, magic_key}
+ end
end
def decode_and_validate(magickey, salmon) do
[modulus, exponent] = magickey
|> String.split(".")
- |> Enum.map(&Base.url_decode64!/1)
+ |> Enum.map(fn (n) -> Base.url_decode64!(n, padding: false) end)
|> Enum.map(make_integer)
{:RSAPublicKey, modulus, exponent}
"RSA.#{modulus_enc}.#{exponent_enc}"
end
- def generate_rsa_pem do
- port = Port.open({:spawn, "openssl genrsa"}, [:binary])
- {:ok, pem} = receive do
- {^port, {:data, pem}} -> {:ok, pem}
- end
- Port.close(port)
- if Regex.match?(~r/RSA PRIVATE KEY/, pem) do
+ # Native generation of RSA keys is only available since OTP 20+ and in default build conditions
+ # 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
{:ok, pem}
- else
- :error
end
+ rescue
+ _ ->
+ def generate_rsa_pem do
+ port = Port.open({:spawn, "openssl genrsa"}, [:binary])
+ {: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
+ :error
+ end
+ end
end
def keys_from_pem(pem) do
|> Enum.map(&Base.url_encode64/1)
|> Enum.join(".")
- signature = :public_key.sign(signed_text, :sha256, private_key) |> to_string |> Base.url_encode64
- doc_base64= doc |> Base.url_encode64
+ signature = signed_text
+ |> :public_key.sign(:sha256, private_key)
+ |> to_string
+ |> 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
+ to
+ |> 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)
+ else
+ e -> Logger.debug(fn -> "Pushing salmon to #{salmon} failed, #{inspect(e)}" end)
+ end
+ end
+
+ defp send_to_user(_,_,_), do: nil
+
+ def publish(user, activity, poster \\ &@httpoison.post/4)
+ def publish(%{info: %{"keys" => keys}} = user, activity, poster) do
+ feed = ActivityRepresenter.to_simple_form(activity, user, true)
+ |> ActivityRepresenter.wrap_with_entry
+ |> :xmerl.export_simple(:xmerl_xml)
+ |> to_string
+
+ if feed do
+ {: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)
+ end)
+ end
+ end
+
+ def publish(%{id: id}, _, _), do: Logger.debug(fn -> "Keys missing for user #{id}" end)
end
projects / akkoma / blobdiff