[master/rhel7-branch] Warn user if they enter a weak password in TUI. (#1001039)

[Samantha N. Bueno]

This is in keeping some consistency with GUI behavior, check a user's
pw quality score and warn/prompt them to confirm whether they are ok
with using a weak pw.

Resolves: rhbz#1001039
---
 pyanaconda/ui/tui/spokes/__init__.py | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/pyanaconda/ui/tui/spokes/__init__.py b/pyanaconda/ui/tui/spokes/__init__.py
index 2f92126..fc904b3 100644
--- a/pyanaconda/ui/tui/spokes/__init__.py
+++ b/pyanaconda/ui/tui/spokes/__init__.py
@@ -22,7 +22,7 @@ from pyanaconda.ui.tui import simpleline as tui
 from pyanaconda.ui.tui.tuiobject import TUIObject, YesNoDialog
 from pyanaconda.ui.common import Spoke, StandaloneSpoke, NormalSpoke, PersonalizationSpoke, collect
 from pyanaconda.users import validatePassword
-from pwquality import PWQError
+import pwquality
 import re
 from collections import namedtuple
 from pyanaconda.iutil import setdeepattr, getdeepattr
@@ -104,6 +104,25 @@ class EditTUIDialog(NormalTUISpoke):
         return True

def prompt(self, entry = None):
+        def _validatePassword(pw, confirm):
+            """ Better password checking. This sets up a quality checker
+                to score password attempts. This is similar to the pw quality
+                check done in the GUI, except this only raises an error if a
+                password is weak.
+            """
+            # set up quality checker
+            _pwq = pwquality.PWQSettings()
+            _pwq.read_config()
+
+            error = validatePassword(pw, confirm)
+            if error:
+                return error
+            strength = _pwq.check(pw, None, None)
+            if strength < 50:
+                raise pwquality.PWQError
+            else:
+                return None
+
         if not entry:
             return None

@@ -114,11 +133,11 @@ class EditTUIDialog(NormalTUISpoke):
             # just returning an error is either blank or mismatched
             # passwords.  Raising is because of poor quality.
             try:
-                error = validatePassword(pw, confirm)
+                error = _validatePassword(pw, confirm)
                 if error:
                     print(error)
                     return None
-            except PWQError as e:
+            except pwquality.PWQError as e:
                 error = _("You have provided a weak password: %s. " % e.message)
                 error += _("\nWould you like to use it anyway?")
                 question_window = YesNoDialog(self._app, error)