distraction.party/lib/pleroma/web/oauth/oauth_controller.ex

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defmodule Pleroma.Web.OAuth.OAuthController do
use Pleroma.Web, :controller
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alias Pleroma.Web.OAuth.{Authorization, Token, App}
alias Pleroma.{Repo, User}
alias Comeonin.Pbkdf2
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plug(:fetch_session)
plug(:fetch_flash)
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action_fallback(Pleroma.Web.OAuth.FallbackController)
def authorize(conn, params) do
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render(conn, "show.html", %{
response_type: params["response_type"],
client_id: params["client_id"],
scope: params["scope"],
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redirect_uri: params["redirect_uri"],
state: params["state"]
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})
end
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def create_authorization(conn, %{
"authorization" =>
%{
"name" => name,
"password" => password,
"client_id" => client_id,
"redirect_uri" => redirect_uri
} = params
}) do
with %User{} = user <- User.get_cached_by_nickname(name),
true <- Pbkdf2.checkpw(password, user.password_hash),
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%App{} = app <- Repo.get_by(App, client_id: client_id),
{:ok, auth} <- Authorization.create_authorization(app, user) do
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if redirect_uri == "urn:ietf:wg:oauth:2.0:oob" do
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render(conn, "results.html", %{
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auth: auth
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})
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else
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connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
url = "#{redirect_uri}#{connector}code=#{auth.token}"
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url =
if params["state"] do
url <> "&state=#{params["state"]}"
else
url
end
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redirect(conn, external: url)
end
end
end
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# TODO
# - proper scope handling
def token_exchange(conn, %{"grant_type" => "authorization_code"} = params) do
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with %App{} = app <-
Repo.get_by(
App,
client_id: params["client_id"],
client_secret: params["client_secret"]
),
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fixed_token = fix_padding(params["code"]),
%Authorization{} = auth <- Repo.get_by(Authorization, token: fixed_token, app_id: app.id),
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{:ok, token} <- Token.exchange_token(app, auth) do
response = %{
token_type: "Bearer",
access_token: token.token,
refresh_token: token.refresh_token,
expires_in: 60 * 10,
scope: "read write follow"
}
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json(conn, response)
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else
_error -> json(conn, %{error: "Invalid credentials"})
end
end
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# TODO
# - investigate a way to verify the user wants to grant read/write/follow once scope handling is done
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def token_exchange(
conn,
%{"grant_type" => "password", "name" => name, "password" => password} = params
) do
with %App{} = app <-
Repo.get_by(
App,
client_id: params["client_id"],
client_secret: params["client_secret"]
),
%User{} = user <- User.get_cached_by_nickname(name),
true <- Pbkdf2.checkpw(password, user.password_hash),
{:ok, auth} <- Authorization.create_authorization(app, user),
{:ok, token} <- Token.exchange_token(app, auth) do
response = %{
token_type: "Bearer",
access_token: token.token,
refresh_token: token.refresh_token,
expires_in: 60 * 10,
scope: "read write follow"
}
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json(conn, response)
else
_error -> json(conn, %{error: "Invalid credentials"})
end
end
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defp fix_padding(token) do
token
|> Base.url_decode64!(padding: false)
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|> Base.url_encode64()
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end
end