Question

我有以下Java代码，我正在尝试转换为python，我不确定如何执行此操作：

import java.security.spec.X509EncodedKeySpec;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.Signature;

byte[] key = KeyReader.read(filestream) 
  //KeyReader.read(inputstream) just reads in the bytes 1 at a time from the filestream
X509EncodedKeySpec pubKey = new X509EncodedKeySpec(key);
KeyFactory keyFactory = KeyFactory.getInstance("DSA");

PublicKey pub = keyFactory.generatePublic(pubKey);

Signature signature = Signature.getInstance("SHA1withDSA");
signature.initVerify(pub)
signature.update(a_byte_string) //doesn't matter

我很遗憾在python中如何做到这一点。具体来说，SHA1withDSA部分。我只是不太了解python加密库（确切地说是m2crypto）来映射函数（也没有找到关于如何做到这一点的任何体面的文章）。

Answer 1

我不完全理解Java代码，但这是你想要做的吗？

from M2Crypto import X509

x509 = X509.load_cert(filename)
assert x509.verify() == 1

java to python转换：x509 / dsa / sha1withdsa crypto howto？

1 个答案: