54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import base64
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from cryptography import fernet
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from oslo_config import cfg
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from oslo_utils import encodeutils
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from zun.common import exception
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def encrypt(value, encryption_key=None):
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if value is None:
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return None
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encryption_key = get_valid_encryption_key(encryption_key)
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encoded_key = base64.b64encode(encryption_key.encode('utf-8'))
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sym = fernet.Fernet(encoded_key)
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res = sym.encrypt(encodeutils.safe_encode(value))
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return encodeutils.safe_decode(res)
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def decrypt(data, encryption_key=None):
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if data is None:
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return None
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encryption_key = get_valid_encryption_key(encryption_key)
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encoded_key = base64.b64encode(encryption_key.encode('utf-8'))
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sym = fernet.Fernet(encoded_key)
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try:
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value = sym.decrypt(encodeutils.safe_encode(data))
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if value is not None:
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return encodeutils.safe_decode(value, 'utf-8')
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except fernet.InvalidToken:
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raise exception.InvalidEncryptionKey()
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def get_valid_encryption_key(encryption_key):
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if encryption_key is None:
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encryption_key = cfg.CONF.auth_encryption_key
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return encryption_key[:32]
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