use keyring to store user password

using a quite lame cryptedfile by the moment until dbus bug
makes gnome-keyring usable again or we come up with the
encrypted database solution. we might want to explore the
option of using this python-keyring with the different
native backends for win and macosx.

for now: we generate a random secret that we store in the qsettings file.
so, the whole thing is just to avoid plaintext stuff.
for this, we could have done rot13, haha.

3 files changed, 93 insertions, 4 deletions

diff --git a/src/leap/crypto/__init__.py b/src/leap/crypto/__init__.py
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/src/leap/crypto/__init__.py
diff --git a/src/leap/crypto/leapkeyring.py b/src/leap/crypto/leapkeyring.py
new file mode 100644
index 00000000..394142db
--- /dev/null
+++ b/src/leap/crypto/leapkeyring.py
@@ -0,0 +1,63 @@
+import os
+
+import keyring
+
+#############
+# Disclaimer
+#############
+# This currently is not a keyring, it's more like a joke.
+# No, seriously.
+# We're affected by this **bug**
+
+# https://bitbucket.org/kang/python-keyring-lib/issue/65/dbusexception-method-opensession-with
+
+# so using the gnome keyring does not seem feasible right now.
+# I thought this was the next best option to store secrets in plain sight.
+
+# in the future we should move to use the gnome/kde/macosx/win keyrings.
+
+
+class LeapCryptedFileKeyring(keyring.backend.CryptedFileKeyring):
+
+    filename = os.path.expanduser("~/.config/leap/.secrets")
+
+    def __init__(self, seed=None):
+        self.seed = seed
+
+    def _get_new_password(self):
+        # XXX every time this method is called,
+        # $deity kills a kitten.
+        return "secret%s" % self.seed
+
+    def _init_file(self):
+        self.keyring_key = self._get_new_password()
+        self.set_password('keyring_setting', 'pass_ref', 'pass_ref_value')
+
+    def _unlock(self):
+        self.keyring_key = self._get_new_password()
+        print 'keyring key ', self.keyring_key
+        try:
+            ref_pw = self.get_password(
+                'keyring_setting',
+                'pass_ref')
+            print 'ref pw ', ref_pw
+            assert ref_pw == "pass_ref_value"
+        except AssertionError:
+            self._lock()
+            raise ValueError('Incorrect password')
+
+
+def leap_set_password(key, value, seed="xxx"):
+    keyring.set_keyring(LeapCryptedFileKeyring(seed=seed))
+    keyring.set_password('leap', key, value)
+
+
+def leap_get_password(key, seed="xxx"):
+    keyring.set_keyring(LeapCryptedFileKeyring(seed=seed))
+    return keyring.get_password('leap', key)
+
+
+if __name__ == "__main__":
+    leap_set_password('test', 'bar')
+    passwd = leap_get_password('test')
+    assert passwd == 'bar'
diff --git a/src/leap/gui/firstrunwizard.py b/src/leap/gui/firstrunwizard.py
index 3b27985f..1012f64c 100755
--- a/src/leap/gui/firstrunwizard.py
+++ b/src/leap/gui/firstrunwizard.py
@@ -8,6 +8,7 @@ sip.setapi('QVariant', 2)
 from PyQt4 import QtCore
 from PyQt4 import QtGui
 
+from leap.crypto import leapkeyring
 from leap.gui import mainwindow_rc
 
 logger = logging.getLogger(__name__)
@@ -89,7 +90,9 @@ QLabel { color: red;
 
 
 class FirstRunWizard(QtGui.QWizard):
-    def __init__(self, parent=None, providers=None, success_cb=None):
+    def __init__(
+            self, parent=None, providers=None,
+            success_cb=None):
         super(FirstRunWizard, self).__init__(
             parent,
             QtCore.Qt.WindowStaysOnTopHint)
@@ -126,6 +129,7 @@ class FirstRunWizard(QtGui.QWizard):
         QtGui.QWizard.setWindowFlags(self, flags)
 
     def focusOutEvent(self, event):
+        # needed ?
         self.setFocus(True)
         self.activateWindow()
         self.raise_()
@@ -137,13 +141,27 @@ class FirstRunWizard(QtGui.QWizard):
         gather the info, update settings
         and call the success callback.
         """
-        logger.debug('chosen provider: %s', self.get_provider())
-        logger.debug('username: %s', self.field('userName'))
-        logger.debug('remember password: %s', self.field('rememberPassword'))
+        provider = self.get_provider()
+        username = self.field('userName')
+        password = self.field('userPassword')
+        remember_pass = self.field('rememberPassword')
+
+        logger.debug('chosen provider: %s', provider)
+        logger.debug('username: %s', username)
+        logger.debug('remember password: %s', remember_pass)
         super(FirstRunWizard, self).accept()
 
         settings = QtCore.QSettings()
         settings.setValue("FirstRunWizardDone", True)
+        settings.setValue(
+            "eip_%s_username" % provider,
+            username)
+        settings.setValue("%s_remember_pass" % provider, remember_pass)
+
+        seed = self.get_random_str(10)
+        settings.setValue("%s_seed" % provider, seed)
+
+        leapkeyring.leap_set_password(username, password, seed=seed)
 
         logger.debug('First Run Wizard Done.')
         cb = self.success_cb
@@ -154,6 +172,14 @@ class FirstRunWizard(QtGui.QWizard):
         provider = self.field('provider_index')
         return self.providers[provider]
 
+    def get_random_str(self, n):
+        from string import (ascii_uppercase, ascii_lowercase, digits)
+        from random import choice
+        return ''.join(choice(
+            ascii_uppercase +
+            ascii_lowercase +
+            digits) for x in range(n))
+
 
 class IntroPage(QtGui.QWizardPage):
     def __init__(self, parent=None):