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.

2 files changed, 63 insertions, 0 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'