Python：使用pyOpenSSL.crypto读取pkcs12证书

Question

我有西班牙当局（FNMT）颁发的有效证书，我想玩它以了解更多相关信息。该文件的扩展名为.p12

我想阅读其中的信息（名字和姓氏）并检查证书是否有效。用pyOpenSSL可以做到吗？我想我必须在OpenSSL中使用加密模块。任何帮助或有用的链接？尝试在这里阅读：http://packages.python.org/pyOpenSSL/openssl-crypto.html但没有太多的信息:-(

Answer 1

这是非常直接的使用。这不是测试，但应该工作：

# load OpenSSL.crypto
from OpenSSL import crypto

# open it, using password. Supply/read your own from stdin.
p12 = crypto.load_pkcs12(open("/path/to/cert.p12", 'rb').read(), passwd)

# get various properties of said file.
# note these are PyOpenSSL objects, not strings although you
# can convert them to PEM-encoded strings.
p12.get_certificate()     # (signed) certificate object
p12.get_privatekey()      # private key.
p12.get_ca_certificates() # ca chain.

有关更多示例，请查看unit test code of pyopenssl。您可能希望使用该库的各种方式

另见here或没有广告here。

Answer 2

回答旧Q可能是错误的，但我认为这可能会帮助那些在我之后找到这个Q的人。这个解决方案适用于python 3，我认为更好一些。我在the repo of zeep找到它，是一个封装用法的类。

类

import os
from OpenSSL import crypto

class PKCS12Manager():

    def __init__(self, p12file, passphrase):
        self.p12file = p12file
        self.unlock = passphrase
        self.webservices_dir = ''
        self.keyfile = ''
        self.certfile = ''

        # Get filename without extension
        ext = os.path.splitext(p12file)
        self.filebasename = os.path.basename(ext[0])

        self.createPrivateCertStore()
        self.p12topem()

    def getKey(self):
        return self.keyfile

    def getCert(self):
        return self.certfile

    def createPrivateCertStore(self):
        home = os.path.expanduser('~')
        webservices_dir = os.path.join(home, '.webservices')
        if not os.path.exists(webservices_dir):
            os.mkdir(webservices_dir)
        os.chmod(webservices_dir, 0o700)
        self.webservices_dir = webservices_dir

    def p12topem(self):
        p12 = crypto.load_pkcs12(open(self.p12file, 'rb').read(), bytes(self.unlock, 'utf-8'))

        # PEM formatted private key
        key = crypto.dump_privatekey(crypto.FILETYPE_PEM, p12.get_privatekey())

        self.keyfile = os.path.join(self.webservices_dir, self.filebasename + ".key.pem")
        open(self.keyfile, 'a').close()
        os.chmod(self.keyfile, 0o600)
        with open(self.keyfile, 'wb') as f:
            f.write(key)


        # PEM formatted certificate
        cert = crypto.dump_certificate(crypto.FILETYPE_PEM, p12.get_certificate())

        self.certfile = os.path.join(self.webservices_dir, self.filebasename + ".crt.pem")
        open(self.certfile, 'a').close()
        os.chmod(self.certfile, 0o644)
        with open(self.certfile, 'wb') as f:
            f.write(cert)

用法

from requests import Session
from zeep import Client
from zeep.transports import Transport

# https://github.com/mvantellingen/python-zeep/issues/824
pkcs12 = PKCS12Manager('cert.p12', 'password_for_cert')
session = Session()
session.cert = (pkcs12.getCert(), pkcs12.getKey())

transport = Transport(session=session)
client = Client('url_service', transport=transport)