It seems commit 0c44758 broke authentication ni node 0.10.5, whose sha1 digest function still doesn't return a Buffer.

Reverting to pre - 0c44758 fixes that issue

See:

var Crypto = require("crypto");
undefined
var hash = Crypto.createHash("sha1");
undefined
hash.update("bloo")
{ _binding: {}, _options: undefined }
hash.digest("binary");
'¸ð#&¢1\u0010g®]\u001cBN jÁá'