User Voice Config

Make it possible to enable UserVoice in a KARL site.

Product Backlog Description

As a site administrator, I can enable UserVoice integration by providing an API Key and Account key.

Specifications

• Initial effort, just spend half a day.
• Do this on a branch.
• Make a place in the configuration to put in the keys. Most likely, in the same spot as the Google Analytics registration: in the karl.ini file.
• As a demonstration, put a <a> link on the Communities page that is connected to UserVoice.
• The connection to UserVoice includes some salted key as a limited representation of the user for “Single Sign-On”. See the example Python code below, from Jason.
• Thus, clicking on the link causes you to be identified using your first+last name from KARL, inside UserVoice.

Sample Python Code

from Crypto.Cipher import AES
import base64
import hashlib
import urllib
import operator
import array
import simplejson as json

message = {
  "guid" : "1276710098"
  "expires" : "2010-06-16 18:11:38",
  "display_name" : "Example User",
  "email" : "example@test.com",
  "url" : "http://example.com/users/1234",
  "avatar_url" : "http://example.com/users/1234/avatar.png"
  }
block_size = 16
mode = AES.MODE_CBC

api_key = "REPLACE_WITH_REAL_KEY"
account_key = 'REPLACE_WITH_REAL_KEY'
iv = "OpenSSL for Ruby"

json = json.dumps(message, separators=(',',':'))

salted = api_key+account_key
saltedHash = hashlib.sha1(salted).digest()[:16]

json_bytes = array.array('b', json[0 : len(json)])
iv_bytes = array.array('b', iv[0 : len(iv)])

# # xor the iv into the first 16 bytes.
for i in range(0, 16):
    json_bytes[i] = operator.xor(json_bytes[i], iv_bytes[i])

pad = block_size - len(json_bytes.tostring()) % block_size
data = json_bytes.tostring() + pad * chr(pad)
aes = AES.new(saltedHash, mode, iv)
encrypted_bytes = aes.encrypt(data)

param_for_uservoice_sso = urllib.quote(base64.b64encode(encrypted_bytes))