Better file structure and naming

lib/auth.coffee

@@ -0,0 +1,63 @@
+crypto = require 'crypto'
+
+
+exports.parseAuthHeader = (authHeader) ->
+  res = {}
+  i = authHeader.indexOf(' ')
+  res['method'] = authHeader.slice(0, i)
+
+  options = authHeader.slice(i + 1)
+  regex = /([a-z]+)="([a-zA-Z0-9\/\.@\-,=]+)"/g
+  while (r = regex.exec(options)) != null
+    res[r[1]] = r[2]
+
+  regex = /([a-z]+)=([a-zA-Z0-9\/\.@\-]+)/g
+  while (r = regex.exec(options)) != null
+    res[r[1]] = r[2]
+  return res
+
+
+exports.basic = (username, password) ->
+  "Basic #{new Buffer("#{username}:#{password}").toString('base64')}"
+
+
+exports.digest = (username, password, uri, httpMethod, body, authHeader) ->
+  cnonce = '0a4f113b'
+  nc = '00000001'
+
+  if authHeader.qop?
+    if authHeader.qop.indexOf(',') != -1
+      qop = 'auth' # either auth or auth-int. prefer auth
+    else
+      qop = authHeader.qop
+
+  ha1 = crypto.createHash('md5')
+  ha1.update(username).update(':').update(authHeader.realm).update(':').update(password)
+  # TODO support "MD5-sess" algorithm directive
+  ha1 = ha1.digest('hex')
+
+  ha2 = crypto.createHash('md5')
+  ha2.update(httpMethod).update(':').update(uri)
+  if qop == 'auth-int'
+    ha2.update(':').update(body)
+  ha2 = ha2.digest('hex')
+
+  response = crypto.createHash('md5')
+  response.update(ha1).update(':').update(authHeader.nonce)
+
+  if qop?
+    response.update(':').update(nc).update(':').update(cnonce).update(':').update(qop)
+  response.update(':').update(ha2)
+  response = response.digest('hex')
+
+  authString = "Digest username=\"#{username}\""
+  authString += ",realm=\"#{authHeader.realm}\""
+  authString += ",nonce=\"#{authHeader.nonce}\""
+  authString += ",uri=\"#{uri}\""
+  authString += ",algorithm=#{authHeader.algorithm}" if authHeader.algorithm?
+  authString += ",qop=#{qop}"
+  authString += ",nc=#{nc}"
+  authString += ",cnonce=\"#{cnonce}\""
+  authString += ",response=\"#{response}\""
+  authString += ",opaque=\"#{authHeader.opaque}\""
+  return authString