Get rid of PyCrypto dependency

The origin of this code is from Glance and is not used in Heat.

Change-Id: I4a22974e24fb277aea79212f0aee2f7e85a0ea76
Signed-off-by: Jeff Peeler <jpeeler@redhat.com>

diff --git a/heat/common/crypt.py b/heat/common/crypt.py
deleted file mode 100644 (file)
index af6a335..0000000
--- a/heat/common/crypt.py
+++ /dev/null
@@ -1,65 +0,0 @@
-# vim: tabstop=4 shiftwidth=4 softtabstop=4
-
-#
-#    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.
-
-"""
-Routines for URL-safe encrypting/decrypting
-"""
-
-import base64
-
-from Crypto.Cipher import AES
-from Crypto import Random
-from Crypto.Random import random
-
-
-def urlsafe_encrypt(key, plaintext, blocksize=16):
-    """
-    Encrypts plaintext. Resulting ciphertext will contain URL-safe characters
-    :param key: AES secret key
-    :param plaintext: Input text to be encrypted
-    :param blocksize: Non-zero integer multiple of AES blocksize in bytes (16)
-
-    :returns : Resulting ciphertext
-    """
-    def pad(text):
-        """
-        Pads text to be encrypted
-        """
-        pad_length = (blocksize - len(text) % blocksize)
-        sr = random.StrongRandom()
-        pad = ''.join(chr(sr.randint(1, 0xFF)) for i in range(pad_length - 1))
-        # We use chr(0) as a delimiter between text and padding
-        return text + chr(0) + pad
-
-    # random initial 16 bytes for CBC
-    init_vector = Random.get_random_bytes(16)
-    cypher = AES.new(key, AES.MODE_CBC, init_vector)
-    padded = cypher.encrypt(pad(str(plaintext)))
-    return base64.urlsafe_b64encode(init_vector + padded)
-
-
-def urlsafe_decrypt(key, ciphertext):
-    """
-    Decrypts URL-safe base64 encoded ciphertext
-    :param key: AES secret key
-    :param ciphertext: The encrypted text to decrypt
-
-    :returns : Resulting plaintext
-    """
-    # Cast from unicode
-    ciphertext = base64.urlsafe_b64decode(str(ciphertext))
-    cypher = AES.new(key, AES.MODE_CBC, ciphertext[:16])
-    padded = cypher.decrypt(ciphertext[16:])
-    return padded[:padded.rfind(chr(0))]