WIP of keypair extension

keypairs.py

# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2011 OpenStack LLC.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

""" Keypair management extension"""

from webob import exc

from nova import db
from nova import crypto
from nova import exception
from nova.api.openstack import extensions


class KeypairExtraSpecsController(object):
    """ Keypair API controller for the Openstack API """

    def _gen_key(self):
        """
        Generate a key
        """
        # TODO(jesse): crypto.generate_key_pair is currently a slow method
        #              and should probably be moved to a process pool?
        private_key, public_key, fingerprint = crypto.generate_key_pair()
        return {'private_key': private_key,
                'public_key': public_key,
                'fingerprint': fingerprint}

    def create(self, req, body):
        """
        Create or import keypair.

        Sending key_name will generate a key and return private_key
        and fingerprint.

        You can send a public_key to add an existing ssh key

        params: keypair object with:
            key_name (required) - string
            fingerprint (optional) - string
            public_key (optional) - string
        """

        context = req.environ['nova.context']
        params = body['keypair']
        key_name = params['key_name']

        # NOTE(ja): generation is slow, so shortcut invalid key_name exception
        try:
            db.key_pair_get(context, context.user_id, key_name)
            raise exception.KeyPairExists(key_name=key_name)
        except exception.NotFound:
            pass

        keypair = {'user_id': context.user_id,
                   'name': key_name}

        # import if public_key is sent
        if 'public_key' in params:
            keypair['public_key'] = params['public_key']
            keypair['fingerprint'] = params.get('fingerprint', None)
        else:
            generated_key = self._gen_key()
            keypair['private_key'] = generated_key['private_key']
            keypair['public_key'] = generated_key['public_key']
            keypair['fingerprint'] = generated_key['fingerprint']

        db.key_pair_create(context, keypair)
        return {'keypair': keypair}


    def delete(self, req, name):
        """
        Delete a keypair with a given name
        """
        context = req.environ['nova.context']
        db.key_pair_destroy(context, context.user_id, name)
        return exc.HTTPAccepted()

    def index(self, req):
        """
        List of keypairs for a user
        """
        context = req.environ['nova.context']
        key_pairs = db.key_pair_get_all_by_user(context, context.user_id)
        rval = []
        for key_pair in key_pairs:
            rval.append({
                'name': key_pair['name'],
                'key_name': key_pair['name'],
                'fingerprint': key_pair['fingerprint'],
            })

        return {'keypairs': rval}


class Keypairextraspecs(extensions.ExtensionDescriptor):

    def get_name(self):
        return "KeypairExtraSpecs"

    def get_alias(self):
        return "os-keypair-extra-specs"

    def get_description(self):
        return "Keypair extra specs"

    def get_namespace(self):
        return \
         "http://docs.openstack.org/ext/keypair_extra_specs/api/v1.1"

    def get_updated(self):
        return "2011-08-08T00:00:00+00:00"

    def get_resources(self):
        resources = []
        res = extensions.ResourceExtension(
                'os-extra_specs',
                KeypairExtraSpecsController(),
                parent=dict(member_name='keypair', collection_name='keypairs'))

        resources.append(res)
        return resources