0

我正在尝试运行 DSA 的pycryptodome 示例。这是示例代码：

from Crypto.PublicKey import DSA
from Crypto.Signature import DSS
from Crypto.Hash import SHA256

# Create a new DSA key
key = DSA.generate(2048)
f = open("public_key.pem", "w")
f.write(key.publickey().export_key())
f.close()

# Sign a message
message = b"Hello"
hash_obj = SHA256.new(message)
signer = DSS.new(key, 'fips-186-3')
signature = signer.sign(hash_obj)

但我正面临ImportError着DSS。这是错误输出：

Traceback (most recent call last):
  File "/usr/lib/python3.6/code.py", line 91, in runcode
    exec(code, self.locals)
  File "<input>", line 1, in <module>
  File "/snap/pycharm-professional/154/helpers/pydev/_pydev_bundle/pydev_umd.py", line 197, in runfile
    pydev_imports.execfile(filename, global_vars, local_vars)  # execute the script
  File "/snap/pycharm-professional/154/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/home/username/Projects/DSA_Example.py", line 2, in <module>
    from Crypto.Signature import DSS
ImportError: cannot import name 'DSS'

我的开发环境包括：

  • Ubuntu 18.04.3 LTS
  • Python 3.6.8
  • PyCharm IDE 2019.2
  • 使用venvPython 虚拟环境
  • pip list命令显示：
    (venv) username@myubuntu:~/Projects/MyProject/$ pip list
    DEPRECATION: The default format will switch to columns in the future. You can use --format=(legacy|columns) (or define a format=(legacy|columns) in your pip.conf under the [list] section) to disable this warning.
    asn1crypto (0.24.0)
    cryptography (2.1.4)
    decorator (4.1.2)
    enum34 (1.1.6)
    idna (2.6)
    ipaddress (1.0.17)
    keyring (10.6.0)
    keyrings.alt (3.0)
    networkx (1.11)
    numpy (1.13.3)
    pip (9.0.1)
    pycrypto (2.6.1)
    pycryptodome (3.9.0)
    pygobject (3.26.1)
    pyxdg (0.25)
    PyYAML (3.12)
    rubber (1.4)
    SecretStorage (2.3.1)
    setuptools (39.0.1)
    six (1.11.0)
    wheel (0.30.0)

现在如何修复 DSS 的导入错误？

4

1 回答 1

1

看起来您还安装了 pycrypto (2.6.1)，它还有一个名为 Crypto.Signature 的模块。发生的事情是 Python 正在尝试导入 pycrypto.Crypto.Signature（它没有 DSS 模块）而不是 pycryptodome.Crypto.Signature。要解决此问题，您可以尝试运行 pip uninstall pycrypto并查看是否可以解决您的问题。

请注意， pycryptodome的安装页面上写着“必须避免同时安装 PyCrypto 和 PyCryptodome，因为它们会相互干扰”。

于 2019-09-22T21:21:58.730 回答