core, memory, bridge: added profile password + password encryption: /!\ This changeset updates the database version to 2 and modify the database content! Description: - new parameter General / Password to store the profile password - profile password is initialized with XMPP password value, it is stored hashed - bridge methods asyncCreateProfile/asyncConnect takes a new argument "password" (default = "") - bridge method asyncConnect returns a boolean (True = connection already established, False = connection initiated) - profile password is checked before initializing the XMPP connection - new private individual parameter to store the personal encryption key of each profile - personal key is randomly generated and encrypted with the profile password - personal key is decrypted after profile authentification and stored in a Sessions instance - personal key is used to encrypt/decrypt other passwords when they need to be retrieved/modified - modifying the profile password re-encrypt the personal key - Memory.setParam now returns a Deferred (the bridge method "setParam" is unchanged) - Memory.asyncGetParamA eventually decrypts the password, Memory.getParamA would fail on a password parameter TODO: - if profile authentication is OK but XMPP authentication is KO, prompt the user for another XMPP password - fix the method "registerNewAccount" (and move it to a plugin) - remove bridge method "connect", sole "asyncConnect" should be used

--- a/src/core/constants.py	Sat May 10 17:37:32 2014 +0200
+++ b/src/core/constants.py	Wed May 07 16:02:23 2014 +0200
@@ -40,6 +40,10 @@
     NO_SECURITY_LIMIT = -1
     INDIVIDUAL = "individual"
     GENERAL = "general"
+    # Parameters related to encryption
+    PROFILE_PASS_PATH = ('General', 'Password')
+    MEMORY_CRYPTO_NAMESPACE = 'crypto'  # for the private persistent binary dict
+    MEMORY_CRYPTO_KEY = 'personal_key'
     # Parameters for static blog pages
     STATIC_BLOG_KEY = "Blog page"
     STATIC_BLOG_PARAM_TITLE = "Title"