28 lines
837 B
Elixir
28 lines
837 B
Elixir
|
# https://tools.ietf.org/html/draft-cavage-http-signatures-08
|
||
|
|
defmodule Pleroma.Web.HTTPSignatures do
|
||
|
|
def split_signature(sig) do
|
||
|
|
default = %{"headers" => ["date"]}
|
||
|
|
|
||
|
|
sig
|
||
|
|
|> String.trim()
|
||
|
|
|> String.split(",")
|
||
|
|
|> Enum.reduce(default, fn(part, acc) ->
|
||
|
|
[key | rest] = String.split(part, "=")
|
||
|
|
value = Enum.join(rest, "=")
|
||
|
|
Map.put(acc, key, String.trim(value, "\""))
|
||
|
|
end)
|
||
|
|
end
|
||
|
|
|
||
|
|
def validate(headers, signature, public_key) do
|
||
|
|
sigstring = build_signing_string(headers, signature["headers"])
|
||
|
|
{:ok, sig} = Base.decode64(signature["signature"])
|
||
|
|
verify = :public_key.verify(sigstring, :sha256, sig, public_key)
|
||
|
|
end
|
||
|
|
|
||
|
|
def build_signing_string(headers, used_headers) do
|
||
|
|
used_headers
|
||
|
|
|> Enum.map(fn (header) -> "#{header}: #{headers[header]}" end)
|
||
|
|
|> Enum.join("\n")
|
||
|
|
end
|
||
|
|
end
|