gistfile1.js

var crypto = require('crypto');

["sha1", "md5", "sha256", "sha512", "ripemd160"].forEach(function(algo) {
  exports[algo] = function(data, salt) {
    return (typeof salt != 'undefined' ?
      crypto.createHmac(algo, salt) :
      crypto.createHash(algo)
    ).update(data).digest("hex");
  };
});

something like

 var h = hasher("md5"); sys.pump(myFileReadStream, h); h.on("data", function (hash) { assert(hash === expectedHash) }

Oh my god, you totally took my non-open-source proprietary IM and open sourced it on github.

You are so super sued.