1 # https://tools.ietf.org/html/draft-cavage-http-signatures-08
2 defmodule Pleroma.Web.HTTPSignatures do
3 def split_signature(sig) do
4 default = %{"headers" => ["date"]}
9 |> Enum.reduce(default, fn(part, acc) ->
10 [key | rest] = String.split(part, "=")
11 value = Enum.join(rest, "=")
12 Map.put(acc, key, String.trim(value, "\""))
16 def validate(headers, signature, public_key) do
17 sigstring = build_signing_string(headers, signature["headers"])
18 {:ok, sig} = Base.decode64(signature["signature"])
19 verify = :public_key.verify(sigstring, :sha256, sig, public_key)
22 def build_signing_string(headers, used_headers) do
24 |> Enum.map(fn (header) -> "#{header}: #{headers[header]}" end)