2521N/AIn-house removal of PyCrypto dependency in Glance. This patch is

2521N/ASolaris-specific and not suitable for upstream.

2521N/A

2521N/AConvert urlsafe_encrypt() and urlsafe_decrypt() to use M2Crypto instead

2521N/Aof PyCrypto.

2521N/A

5403N/A--- glance-2015.1.2/glance/common/crypt.py.~1~ 2015-10-13 09:38:23.000000000 -0700

5403N/A+++ glance-2015.1.2/glance/common/crypt.py 2016-01-24 16:48:24.788282369 -0800

5403N/A@@ -20,14 +20,30 @@ Routines for URL-safe encrypting/decrypt

2521N/A """

2521N/A

2521N/A import base64

2521N/A+import os

2521N/A

2521N/A-from Crypto.Cipher import AES

2521N/A-from Crypto import Random

2521N/A-from Crypto.Random import random

5403N/A+from glance.common import exception

5403N/A+

5403N/A+from M2Crypto.EVP import Cipher

5403N/A # NOTE(jokke): simplified transition to py3, behaves like py2 xrange

5403N/A from six.moves import range

5403N/A

5403N/A

2521N/A+def _key_to_alg(key):

2521N/A+ """Return a M2Crypto-compatible AES-CBC algorithm name given a key."""

2521N/A+ aes_algs = {

2521N/A+ 128: 'aes_128_cbc',

2521N/A+ 192: 'aes_192_cbc',

2521N/A+ 256: 'aes_256_cbc'

2521N/A+ }

2521N/A+

2521N/A+ keylen = 8 * len(key)

2521N/A+ if keylen not in aes_algs:

2521N/A+ msg = ('Invalid AES key length, %d bits') % keylen

2521N/A+ raise exception.Invalid(msg)

2521N/A+ return aes_algs[keylen]

5403N/A+

5403N/A+

2521N/A def urlsafe_encrypt(key, plaintext, blocksize=16):

5403N/A """

5403N/A Encrypts plaintext. Resulting ciphertext will contain URL-safe characters

5403N/A@@ -37,20 +53,12 @@ def urlsafe_encrypt(key, plaintext, bloc

2521N/A

2521N/A :returns : Resulting ciphertext

2521N/A """

2521N/A- def pad(text):

2521N/A- """

2521N/A- Pads text to be encrypted

2521N/A- """

2521N/A- pad_length = (blocksize - len(text) % blocksize)

2521N/A- sr = random.StrongRandom()

2521N/A- pad = ''.join(chr(sr.randint(1, 0xFF)) for i in range(pad_length - 1))

2521N/A- # We use chr(0) as a delimiter between text and padding

2521N/A- return text + chr(0) + pad

2521N/A

2521N/A # random initial 16 bytes for CBC

2521N/A- init_vector = Random.get_random_bytes(16)

2521N/A- cypher = AES.new(key, AES.MODE_CBC, init_vector)

2521N/A- padded = cypher.encrypt(pad(str(plaintext)))

2521N/A+ init_vector = os.urandom(16)

2521N/A+ cipher = Cipher(alg=_key_to_alg(key), key=key, iv=init_vector, op=1)

2521N/A+ padded = cipher.update(str(plaintext))

2521N/A+ padded = padded + cipher.final()

2521N/A return base64.urlsafe_b64encode(init_vector + padded)

2521N/A

2521N/A

5403N/A@@ -64,6 +72,7 @@ def urlsafe_decrypt(key, ciphertext):

2521N/A """

2521N/A # Cast from unicode

2521N/A ciphertext = base64.urlsafe_b64decode(str(ciphertext))

2521N/A- cypher = AES.new(key, AES.MODE_CBC, ciphertext[:16])

2521N/A- padded = cypher.decrypt(ciphertext[16:])

2521N/A- return padded[:padded.rfind(chr(0))]

2521N/A+ cipher = Cipher(alg=_key_to_alg(key), key=key, iv=ciphertext[:16], op=0)

2521N/A+ padded = cipher.update(ciphertext[16:])

2521N/A+ padded = padded + cipher.final()

2521N/A+ return padded