Fix python3 issues in pyelliptic:

- use dotted imports, remove unneeded shebangs
 - openssl._OpenSSL._version is of type bytes
 - use b'\x00' literal instead of chr(0) in eccblind and test_openssl
 - use // and divmod in arithmetic to fit PEP238:
   https://docs.python.org/3/whatsnew/2.2.html#pep-238-changing-the-division-operator
This commit is contained in:
Dmitri Bogomolov 2021-02-02 20:10:02 +02:00 committed by Muzahid
parent 0e9674bce1
commit eede298a22
Signed by untrusted user: cis-muzahid
GPG Key ID: 1DC85E7D3AB613EA
7 changed files with 17 additions and 21 deletions

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@ -16,7 +16,7 @@ def inv(a, n):
lm, hm = 1, 0
low, high = a % n, n
while low > 1:
r = high / low
r = high // low
nm, new = hm - lm * r, high - low * r
lm, low, hm, high = nm, new, lm, low
return lm % n
@ -43,8 +43,8 @@ def encode(val, base, minlen=0):
code_string = get_code_string(base)
result = ""
while val > 0:
result = code_string[val % base] + result
val /= base
val, i = divmod(val, base)
result = code_string[i] + result
if len(result) < minlen:
result = code_string[0] * (minlen - len(result)) + result
return result
@ -101,10 +101,11 @@ def base10_multiply(a, n):
return G
if n == 1:
return a
if (n % 2) == 0:
return base10_double(base10_multiply(a, n / 2))
if (n % 2) == 1:
return base10_add(base10_double(base10_multiply(a, n / 2)), a)
n, m = divmod(n, 2)
if m == 0:
return base10_double(base10_multiply(a, n))
if m == 1:
return base10_add(base10_double(base10_multiply(a, n)), a)
return None

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@ -1,12 +1,10 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Symmetric Encryption
"""
# Copyright (C) 2011 Yann GUIBET <yannguibet@gmail.com>
# See LICENSE for details.
from openssl import OpenSSL
from .openssl import OpenSSL
# pylint: disable=redefined-builtin

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@ -1,5 +1,3 @@
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Asymmetric cryptography using elliptic curves
"""
@ -10,9 +8,9 @@ Asymmetric cryptography using elliptic curves
from hashlib import sha512
from struct import pack, unpack
from cipher import Cipher
from hash import equals, hmac_sha256
from openssl import OpenSSL
from .cipher import Cipher
from .hash import equals, hmac_sha256
from .openssl import OpenSSL
class ECC(object):

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@ -1,4 +1,3 @@
#!/usr/bin/env python
"""
ECC blind signature functionality based on
"An Efficient Blind Signature Scheme
@ -151,7 +150,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
# padding manually
bx = OpenSSL.malloc(0, OpenSSL.BN_num_bytes(x))
OpenSSL.BN_bn2bin(x, bx)
out = bx.raw.rjust(l_, chr(0))
out = bx.raw.rjust(l_, b'\x00')
return pack(EC, y_byte, out)
finally:
@ -181,7 +180,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
except AttributeError:
o = OpenSSL.malloc(0, OpenSSL.BN_num_bytes(bn))
OpenSSL.BN_bn2bin(bn, o)
return o.raw.rjust(l_, chr(0))
return o.raw.rjust(l_, b'\x00')
def _bn_deserialize(self, data):
"""Make a BigNum out of string"""

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@ -4,7 +4,7 @@ Wrappers for hash functions from OpenSSL.
# Copyright (C) 2011 Yann GUIBET <yannguibet@gmail.com>
# See LICENSE for details.
from openssl import OpenSSL
from .openssl import OpenSSL
# For python3

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@ -83,7 +83,7 @@ class _OpenSSL(object):
"""
self._lib = ctypes.CDLL(library)
self._version, self._hexversion, self._cflags = get_version(self._lib)
self._libreSSL = self._version.startswith("LibreSSL")
self._libreSSL = self._version.startswith(b"LibreSSL")
self.pointer = ctypes.pointer
self.c_int = ctypes.c_int

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@ -49,6 +49,6 @@ class TestOpenSSL(unittest.TestCase):
c = OpenSSL.malloc(0, OpenSSL.BN_num_bytes(a))
OpenSSL.BN_bn2binpad(a, b, OpenSSL.BN_num_bytes(n))
OpenSSL.BN_bn2bin(a, c)
if b.raw != c.raw.rjust(OpenSSL.BN_num_bytes(n), chr(0)):
if b.raw != c.raw.rjust(OpenSSL.BN_num_bytes(n), b'\x00'):
bad += 1
self.assertEqual(bad, 0)