Formatting

lib/http_signatures/http_signatures.ex

@@ -27,7 +27,14 @@ defmodule HTTPSignatures do
   end
 
   def validate(headers, signature, public_key) do
-    sigstring = build_signing_string(headers, signature["headers"], signature["created"], signature["expires"])
+    sigstring =
+      build_signing_string(
+        headers,
+        signature["headers"],
+        signature["created"],
+        signature["expires"]
+      )
+
     Logger.debug("Signature: #{signature["signature"]}")
     Logger.debug("Sigstring: #{sigstring}")
     {:ok, sig} = Base.decode64(signature["signature"])
@@ -74,14 +81,20 @@ defmodule HTTPSignatures do
   def build_signing_string(headers, used_headers, created, expires) do
     used_headers
     |> Enum.map_join("\n", fn
-        "(created)" -> "(created): #{created}"
-        "(expires)" -> "(expires): #{expires}"
-        header -> "#{header}: #{headers[header]}"
-       end)
+      "(created)" -> "(created): #{created}"
+      "(expires)" -> "(expires): #{expires}"
+      header -> "#{header}: #{headers[header]}"
+    end)
   end
 
   def sign(private_key, key_id, headers) do
-    sigstring = build_signing_string(headers, Enum.sort(Map.keys(headers)), headers["(created)"], headers["(expires)"])
+    sigstring =
+      build_signing_string(
+        headers,
+        Enum.sort(Map.keys(headers)),
+        headers["(created)"],
+        headers["(expires)"]
+      )
 
     signature =
       :public_key.sign(sigstring, :sha256, private_key)
@@ -93,7 +106,7 @@ defmodule HTTPSignatures do
       headers: Map.keys(headers) |> Enum.sort() |> Enum.join(" "),
       signature: signature,
       created: headers["(created)"],
-      expires: headers["(expires)"],
+      expires: headers["(expires)"]
     ]
     |> Enum.filter(fn {_, v} -> v != nil end)
     |> Enum.map_join(",", fn {k, v} -> "#{k}=\"#{v}\"" end)

test/http_signatures_test.exs

@@ -16,8 +16,10 @@ defmodule HttpSignaturesTest do
     "(request-target)" => "post /foo?param=value&pet=dog",
     "host" => "example.com",
     "date" => "Thu, 05 Jan 2014 21:31:40 GMT",
-    "(created)" => "1388957500", # the same date, in unix timestamp
-    "(expires)" => "1388967500", # 10000 seconds later
+    # the same date, in unix timestamp
+    "(created)" => "1388957500",
+    # 10000 seconds later
+    "(expires)" => "1388967500",
     "content-type" => "application/json",
     "digest" => "SHA-256=X48E9qOokqqrvdts8nOJRJN3OWDUoyWxBf7kbu9DBPE=",
     "content-length" => "18"
@@ -79,9 +81,24 @@ defmodule HttpSignaturesTest do
 
   test "it contructs a signing string" do
     expected = "date: Thu, 05 Jan 2014 21:31:40 GMT\ncontent-length: 18"
-    assert expected == HTTPSignatures.build_signing_string(@headers, ["date", "content-length"], @headers["(created)"], @headers["(expires)"])
+
+    assert expected ==
+             HTTPSignatures.build_signing_string(
+               @headers,
+               ["date", "content-length"],
+               @headers["(created)"],
+               @headers["(expires)"]
+             )
+
     expected = "(created): 1388957500\n(expires): 1388967500\ncontent-length: 18"
-    assert expected == HTTPSignatures.build_signing_string(@headers, ["(created)", "(expires)", "content-length"], @headers["(created)"], @headers["(expires)"])
+
+    assert expected ==
+             HTTPSignatures.build_signing_string(
+               @headers,
+               ["(created)", "(expires)", "content-length"],
+               @headers["(created)"],
+               @headers["(expires)"]
+             )
   end
 
   test "it parses the http signature for a conn" do