70 lines
1.7 KiB
Python
70 lines
1.7 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright (C) 2011 Yann GUIBET <yannguibet@gmail.com>
|
|
# See LICENSE for details.
|
|
|
|
from pyelliptic.openssl import OpenSSL
|
|
|
|
|
|
# For python3
|
|
def _equals_bytes(a, b):
|
|
if len(a) != len(b):
|
|
return False
|
|
result = 0
|
|
for x, y in zip(a, b):
|
|
result |= x ^ y
|
|
return result == 0
|
|
|
|
|
|
def _equals_str(a, b):
|
|
if len(a) != len(b):
|
|
return False
|
|
result = 0
|
|
for x, y in zip(a, b):
|
|
result |= ord(x) ^ ord(y)
|
|
return result == 0
|
|
|
|
|
|
def equals(a, b):
|
|
if isinstance(a, str):
|
|
return _equals_str(a, b)
|
|
else:
|
|
return _equals_bytes(a, b)
|
|
|
|
|
|
def hmac_sha256(k, m):
|
|
"""
|
|
Compute the key and the message with HMAC SHA5256
|
|
"""
|
|
key = OpenSSL.malloc(k, len(k))
|
|
d = OpenSSL.malloc(m, len(m))
|
|
md = OpenSSL.malloc(0, 32)
|
|
i = OpenSSL.pointer(OpenSSL.c_int(0))
|
|
OpenSSL.HMAC(OpenSSL.EVP_sha256(), key, len(k), d, len(m), md, i)
|
|
return md.raw
|
|
|
|
|
|
def hmac_sha512(k, m):
|
|
"""
|
|
Compute the key and the message with HMAC SHA512
|
|
"""
|
|
key = OpenSSL.malloc(k, len(k))
|
|
d = OpenSSL.malloc(m, len(m))
|
|
md = OpenSSL.malloc(0, 64)
|
|
i = OpenSSL.pointer(OpenSSL.c_int(0))
|
|
OpenSSL.HMAC(OpenSSL.EVP_sha512(), key, len(k), d, len(m), md, i)
|
|
return md.raw
|
|
|
|
|
|
def pbkdf2(password, salt=None, i=10000, keylen=64):
|
|
if salt is None:
|
|
salt = OpenSSL.rand(8)
|
|
p_password = OpenSSL.malloc(password, len(password))
|
|
p_salt = OpenSSL.malloc(salt, len(salt))
|
|
output = OpenSSL.malloc(0, keylen)
|
|
OpenSSL.PKCS5_PBKDF2_HMAC(p_password, len(password), p_salt,
|
|
len(p_salt), i, OpenSSL.EVP_sha256(),
|
|
keylen, output)
|
|
return salt, output.raw
|