Keyring support for openstackclient.

Bug: 1030440

If password is defined in keyring, use it; otherwise, prompt for the
password. Keying is configured using command line switch,
--os-use-keyring or env(OS_USE_KEYRING).

* openstackclient/common/openstackkeyring.py
  The abstract class for keyring, specifically for openstack. The
  class is used to store encrypted password in keyring, without
  prompting for keyring password. The encrypted password is
  stored in ~/.openstack-keyring.cfg file.

* openstack-common.py
  Update openstackkeyring library from openstack.common.

* openstackclient/shell.py
  OpenStackClient.build_option_parser(): New boolean argument,
   --os-use-keyring, default to env(OS_USE_KEYRING).
  OpenStackClient.authenticate_user(): Get password from keyring,
  if it is defined; otherwise, prompt for the password. If user
  enter a password and keyring is enabled, store it in keyring.
  OpenStackClient.init_keyring_backend(): New method to define
  openstack backend for keyring.
  OpenStackClient.get_password_from_keyring(): New method to
  get password from keyring.
  OpenStackClient.set_password_in_keyring(): New method go set
  password in keyring.

* toos/pip-requires
  Define keyring and pycrypto as one of dependent.

Change-Id: I36d3a63054658c0ef0553d68b38fefbc236930ef

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/pip-requires b/tools/pip-requires
index efcaf7fe..d4ad68b6 100644
--- a/tools/pip-requires
+++ b/tools/pip-requires
@@ -1,7 +1,9 @@
 cliff
 argparse
 httplib2
+keyring
 prettytable
+pycrypto
 python-keystoneclient>=0.1,<0.2
 python-novaclient>=2,<3
 simplejson