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Windows上的Python crypto出错

pyopenssl python-3.x python

Amanda_Panda · 技术社区 · 7 年前

每个import语句单独在解释器中工作,但作为一个整体,这个程序不工作

from hashlib import sha256

from pbkdf2_ctypes import *
import hmac
import hashlib
import binascii
from os import urandom
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend
import getpass

masterpassword = "thisisamasterpassword"
salt = urandom(16) 
masterpassword = pbkdf2_hex(masterpassword.encode('utf-8'), salt)
password = masterpassword.decode()
salt = binascii.hexlify(salt)
salt = salt.decode()

print(masterpassword)

结果是:

C:\Users\me\Desktop>py -3.4 masterpassword.py
Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\pbkdf2_ctypes.py", line 127, in <module>
    raise OSError('Library not found')
OSError: Library not found

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "masterpassword.py", line 3, in <module>
    from pbkdf2_ctypes import *
  File "C:\Python34\lib\site-packages\pbkdf2_ctypes.py", line 153, in <module>
    raise ImportError('Cannot find a compatible cryptographic library '
ImportError: Cannot find a compatible cryptographic library on your system

我还安装了OpenSSL二进制文件( https://slproweb.com/products/Win32OpenSSL.html )确保它在蟒蛇下运行。

1 回复 | 直到 7 年前

DoDoSmarts 7 年前

如果我猜到这段代码从未在Windows-64位机器上运行过。引发的错误来自 pbkdf2_ctypes

if system == 'Windows':
    if platform.architecture()[0] == '64bit':
        libname = ctypes.util.find_library('libeay64') # <--- This does not exist even on 64bit machines ... :)
        if not libname:
            raise OSError('Library not found')
        crypto = ctypes.CDLL(libname)
    else:
        libname = ctypes.util.find_library('libeay32')
        if not libname:
            raise OSError('Library libeay32 not found.')

你可以试着联系Glisco的人,但我认为他们已经不在了,因为他们的公共代码库已经消失了好几年了。

让你走

跑 ctypes.util.find_library('libeay32') 在python中,查看库的位置。然后复制libeay32。dll到libeay64。dll在同一文件夹中。这不会引起任何问题,因为您正在复制一个其他程序都不知道的文件。
去除 from pbkdf2_ctypes import *

导入ctypes。util

libname=ctypes。util。查找库('libeay32') 加密=ctypes。CDLL(libname)

def \u openssl\u hashlib\u to\u crypto\u map\u get(hashfunc): hashlib。sha1:加密。执行副总裁sha1, hashlib。sha224:加密。执行副总裁sha224, hashlib。sha384:加密。执行副总裁sha384, crypto\u hashfunc=hashlib\u to\u crypto\u映射。get(hashfunc) 如果crypto_hashfunc为无: crypto_hashfunc。重新类型=ctypes。c\u void\u p 返回crypto_hashfunc()

“”“OpenSSL兼容包装器 c_hashfunc=ctypes。c\u void\u p(\u openssl\u hashlib\u to\u crypto\u map\u get(摘要))
```
c_pass = ctypes.c_char_p(data)
c_passlen = ctypes.c_int(len(data))
c_salt = ctypes.c_char_p(salt)
c_saltlen = ctypes.c_int(len(salt))
c_iter = ctypes.c_int(iterations)
c_keylen = ctypes.c_int(keylen)
c_buff = ctypes.create_string_buffer(keylen)

crypto.PKCS5_PBKDF2_HMAC.argtypes = [ctypes.c_char_p, ctypes.c_int,
                                 ctypes.c_char_p, ctypes.c_int,
                                 ctypes.c_int, ctypes.c_void_p,
                                 ctypes.c_int, ctypes.c_char_p]

crypto.PKCS5_PBKDF2_HMAC.restype = ctypes.c_int
err = crypto.PKCS5_PBKDF2_HMAC(c_pass, c_passlen,
                    c_salt, c_saltlen,
                    c_iter,
                    c_hashfunc,
                    c_keylen,
                    c_buff)
return (err, c_buff)
```
如果hashfunc为None: hashfunc=hashlib。沙1 err,c\u buff=\u openssl\u pbkdf2(数据,salt,迭代,hashfunc,keylen)
```
if err == 0:
    raise ValueError('wrong parameters')
return c_buff.raw[:keylen]
```
def pbkdf2_hex(数据,salt,迭代次数=1000,keylen=24,hashfunc=无): 返回binascii。hexlify(pkcs5\u pbkdf2\u hmac(数据,salt,迭代,keylen,hashfunc))