77 lines
3.2 KiB
Python
77 lines
3.2 KiB
Python
|
# Copyright 2018 Google Inc.
|
||
|
|
#
|
||
|
|
# Permission is hereby granted, free of charge, to any person obtaining a
|
||
|
|
# copy of this software and associated documentation files (the
|
||
|
|
# "Software"), to deal in the Software without restriction, including
|
||
|
|
# without limitation the rights to use, copy, modify, merge, publish, dis-
|
||
|
|
# tribute, sublicense, and/or sell copies of the Software, and to permit
|
||
|
|
# persons to whom the Software is furnished to do so, subject to the fol-
|
||
|
|
# lowing conditions:
|
||
|
|
#
|
||
|
|
# The above copyright notice and this permission notice shall be included
|
||
|
|
# in all copies or substantial portions of the Software.
|
||
|
|
#
|
||
|
|
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||
|
|
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
|
||
|
|
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
|
||
|
|
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
||
|
|
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
||
|
|
# IN THE SOFTWARE.
|
||
|
|
|
||
|
|
import types
|
||
|
|
from boto.gs.user import User
|
||
|
|
from boto.exception import InvalidEncryptionConfigError
|
||
|
|
from xml.sax import handler
|
||
|
|
|
||
|
|
# Relevant tags for the EncryptionConfiguration XML document.
|
||
|
|
DEFAULT_KMS_KEY_NAME = 'DefaultKmsKeyName'
|
||
|
|
ENCRYPTION_CONFIG = 'EncryptionConfiguration'
|
||
|
|
|
||
|
|
class EncryptionConfig(handler.ContentHandler):
|
||
|
|
"""Encapsulates the EncryptionConfiguration XML document"""
|
||
|
|
def __init__(self):
|
||
|
|
# Valid items in an EncryptionConfiguration XML node.
|
||
|
|
self.default_kms_key_name = None
|
||
|
|
|
||
|
|
self.parse_level = 0
|
||
|
|
|
||
|
|
def validateParseLevel(self, tag, level):
|
||
|
|
"""Verify parse level for a given tag."""
|
||
|
|
if self.parse_level != level:
|
||
|
|
raise InvalidEncryptionConfigError(
|
||
|
|
'Invalid tag %s at parse level %d: ' % (tag, self.parse_level))
|
||
|
|
|
||
|
|
def startElement(self, name, attrs, connection):
|
||
|
|
"""SAX XML logic for parsing new element found."""
|
||
|
|
if name == ENCRYPTION_CONFIG:
|
||
|
|
self.validateParseLevel(name, 0)
|
||
|
|
self.parse_level += 1;
|
||
|
|
elif name == DEFAULT_KMS_KEY_NAME:
|
||
|
|
self.validateParseLevel(name, 1)
|
||
|
|
self.parse_level += 1;
|
||
|
|
else:
|
||
|
|
raise InvalidEncryptionConfigError('Unsupported tag ' + name)
|
||
|
|
|
||
|
|
def endElement(self, name, value, connection):
|
||
|
|
"""SAX XML logic for parsing new element found."""
|
||
|
|
if name == ENCRYPTION_CONFIG:
|
||
|
|
self.validateParseLevel(name, 1)
|
||
|
|
self.parse_level -= 1;
|
||
|
|
elif name == DEFAULT_KMS_KEY_NAME:
|
||
|
|
self.validateParseLevel(name, 2)
|
||
|
|
self.parse_level -= 1;
|
||
|
|
self.default_kms_key_name = value.strip()
|
||
|
|
else:
|
||
|
|
raise InvalidEncryptionConfigError('Unsupported end tag ' + name)
|
||
|
|
|
||
|
|
def to_xml(self):
|
||
|
|
"""Convert EncryptionConfig object into XML string representation."""
|
||
|
|
s = ['<%s>' % ENCRYPTION_CONFIG]
|
||
|
|
if self.default_kms_key_name:
|
||
|
|
s.append('<%s>%s</%s>' % (DEFAULT_KMS_KEY_NAME,
|
||
|
|
self.default_kms_key_name,
|
||
|
|
DEFAULT_KMS_KEY_NAME))
|
||
|
|
s.append('</%s>' % ENCRYPTION_CONFIG)
|
||
|
|
return ''.join(s)
|