108 lines
3.7 KiB
Python
108 lines
3.7 KiB
Python
# Copyright (c) 2010-2012 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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from time import time
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from swift.common.utils import public, get_hmac, streq_const_time
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from swift.common.registry import get_swift_info
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from swift.proxy.controllers.base import Controller, delay_denial
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from swift.common.swob import HTTPOk, HTTPForbidden, HTTPUnauthorized
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class InfoController(Controller):
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"""WSGI controller for info requests"""
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server_type = 'Info'
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def __init__(self, app, version, expose_info, disallowed_sections,
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admin_key):
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super(InfoController, self).__init__(app)
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self.expose_info = expose_info
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self.disallowed_sections = disallowed_sections
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self.admin_key = admin_key
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self.allowed_hmac_methods = {
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'HEAD': ['HEAD', 'GET'],
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'GET': ['GET']}
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@public
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@delay_denial
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def GET(self, req):
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return self.GETorHEAD(req)
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@public
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@delay_denial
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def HEAD(self, req):
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return self.GETorHEAD(req)
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@public
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@delay_denial
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def OPTIONS(self, req):
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return HTTPOk(request=req, headers={'Allow': 'HEAD, GET, OPTIONS'})
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def GETorHEAD(self, req):
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"""Handler for HTTP GET/HEAD requests."""
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"""
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Handles requests to /info
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Should return a WSGI-style callable (such as swob.Response).
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:param req: swob.Request object
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"""
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if not self.expose_info:
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return HTTPForbidden(request=req)
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admin_request = False
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sig = req.params.get('swiftinfo_sig', '')
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expires = req.params.get('swiftinfo_expires', '')
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if sig != '' or expires != '':
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admin_request = True
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if not self.admin_key:
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return HTTPForbidden(request=req)
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try:
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expires = int(expires)
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except ValueError:
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return HTTPUnauthorized(request=req)
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if expires < time():
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return HTTPUnauthorized(request=req)
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valid_sigs = []
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for method in self.allowed_hmac_methods[req.method]:
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valid_sigs.append(get_hmac(method,
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'/info',
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expires,
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self.admin_key))
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# While it's true that any() will short-circuit, this doesn't
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# affect the timing-attack resistance since the only way this will
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# short-circuit is when a valid signature is passed in.
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is_valid_hmac = any(streq_const_time(valid_sig, sig)
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for valid_sig in valid_sigs)
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if not is_valid_hmac:
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return HTTPUnauthorized(request=req)
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headers = {}
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if 'Origin' in req.headers:
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headers['Access-Control-Allow-Origin'] = req.headers['Origin']
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headers['Access-Control-Expose-Headers'] = ', '.join(
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['x-trans-id'])
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info = json.dumps(get_swift_info(
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admin=admin_request, disallowed_sections=self.disallowed_sections))
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return HTTPOk(request=req,
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headers=headers,
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body=info.encode('ascii'),
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content_type='application/json; charset=UTF-8')
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