1 files changed, 77 insertions, 0 deletions
diff --git a/conductor/conductor/common/utils/cipherUtils.py b/conductor/conductor/common/utils/cipherUtils.py
new file mode 100644
index 0000000..6ee6c58
--- /dev/null
+++ b/conductor/conductor/common/utils/cipherUtils.py
@@ -0,0 +1,77 @@
+#
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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.
+#
+# -------------------------------------------------------------------------
+#
+
+import base64
+import hashlib
+from Crypto import Random
+from Crypto.Cipher import AES
+from oslo_config import cfg
+
+CONF = cfg.CONF
+
+cipher_opts = [
+    cfg.StrOpt('appkey',
+               default='ch00se@g003ntropy',
+               help='Master key to secure other secrets')
+]
+
+CONF.register_opts(cipher_opts, group='auth')
+
+
+class AESCipher(object):
+    __instance = None
+
+    @staticmethod
+    def get_instance(key = None):
+        if AESCipher.__instance is None:
+            print ('Creating the singleton instance')
+            AESCipher(key)
+        return AESCipher.__instance
+
+    def __init__(self, key=None):
+        if AESCipher.__instance is not None:
+            raise Exception("This class is a singleton!")
+        else:
+            AESCipher.__instance = self
+
+        self.bs = 32
+        if key is None:
+            key = CONF.auth.appkey.encode()
+
+        self.key = hashlib.sha256(key.encode()).digest()
+
+    def encrypt(self, raw):
+        raw = self._pad(raw)
+        iv = Random.new().read(AES.block_size)
+        cipher = AES.new(self.key, AES.MODE_CBC, iv)
+        return base64.b64encode(iv + cipher.encrypt(raw))
+
+    def decrypt(self, enc):
+        enc = base64.b64decode(enc)
+        iv = enc[:AES.block_size]
+        cipher = AES.new(self.key, AES.MODE_CBC, iv)
+        return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8')
+
+    def _pad(self, s):
+        return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs)
+
+    @staticmethod
+    def _unpad(s):
+        return s[:-ord(s[len(s)-1:])]
+