使用 Python（加密）生成 CSR

我有一个可以工作的骨架，但我有点坚持以下几点；

1. 我没有找到使用加密库处理 SAN (subjectAltName) 的方法？希望我在术语上没有错误，但如果我说——一个主要主机名 test.test.edu，然后又希望该主机也为 Pushu.edu，通常可以是“subjectAltName”。
2. 有什么办法可以看到整个CSR吗？比如，它在哪里显示主题、状态等？我只想看到它打印到屏幕上，但我没有找到用加密来做到这一点的方法。

任何帮助将不胜感激;到目前为止的代码 -

#!/usr/bin/env python

from OpenSSL import crypto, SSL
import subprocess, os, sys

# Create 'usage' portion
# Something, blah blah, use script like this, blah blah.

# Variable
TYPE_RSA = crypto.TYPE_RSA

# Generate pkey
def generateKey(type, bits):

    keyfile = 'incommon.key'
    key = crypto.PKey()
    key.generate_key(type, bits)
    if os.path.exists(keyfile):
        print "Certificate file exists, aborting."
        print " ", keyfile
        sys.exit(1)
    else:
        f = open(keyfile, "w")
        f.write(crypto.dump_privatekey(crypto.FILETYPE_PEM, key))
        f.close()
    return key

# Generate CSR
def generateCSR(nodename):

    csrfile = 'incommon.csr'
    req = crypto.X509Req()
    # Return an X509Name object representing the subject of the certificate.
    req.get_subject().CN = nodename
    #req.get_subject().countryName = 'xxx'
    #req.get_subject().stateOrProvinceName = 'xxx'
    #req.get_subject().localityName = 'xxx'
    #req.get_subject().organizationName = 'xxx'
    #req.get_subject().organizationalUnitName = 'xxx'
    # Set the public key of the certificate to pkey.
    req.set_pubkey(key)
    # Sign the certificate, using the key pkey and the message digest algorithm identified by the string digest.
    req.sign(key, "sha1")
    # Dump the certificate request req into a buffer string encoded with the type type.
    if os.path.exists(csrfile):
        print "Certificate file exists, aborting."
        print " ", csrfile
        sys.exit(1)
    else:
        f = open('incommon.csr', "w")
        f.write(crypto.dump_certificate_request(crypto.FILETYPE_PEM, req))
        f.close()

#Call key & CSR functions
key = generateKey(TYPE_RSA,2048)
# Needs to take input from user.
generateCSR('test.test.edu')

EDIT:

我不久前就解决了这个问题。这是添加了扩展的代码，或者您可以从我的 Github 克隆它：https://github.com/cjcotton/python-csr https://github.com/cjcotton/python-csr;

# Generate Certificate Signing Request (CSR)
def generateCSR(nodename, sans = []):

    C  = raw_input('Enter your country: ')
    ST = raw_input("Enter your state: ")
    L  = raw_input("Enter your location: ")
    O  = raw_input("Enter your organization: ")
    OU = raw_input("Enter your organizational unit: ")

    # Allows you to permanently set values required for CSR
    # To use, comment raw_input and uncomment this section.
    # C  = 'US'
    # ST = 'New York'
    # L  = 'Location'
    # O  = 'Organization'
    # OU = 'Organizational Unit'

    csrfile = 'host.csr'
    keyfile = 'host.key'
    TYPE_RSA = crypto.TYPE_RSA
    # Appends SAN to have 'DNS:'
    ss = []
    for i in sans:
        ss.append("DNS: %s" % i)
    ss = ", ".join(ss)

    req = crypto.X509Req()
    req.get_subject().CN = nodename
    req.get_subject().countryName = C
    req.get_subject().stateOrProvinceName = ST
    req.get_subject().localityName = L
    req.get_subject().organizationName = O
    req.get_subject().organizationalUnitName = OU
    # Add in extensions
    base_constraints = ([
        crypto.X509Extension("keyUsage", False, "Digital Signature, Non Repudiation, Key Encipherment"),
        crypto.X509Extension("basicConstraints", False, "CA:FALSE"),
    ])
    x509_extensions = base_constraints
    # If there are SAN entries, append the base_constraints to include them.
    if ss:
        san_constraint = crypto.X509Extension("subjectAltName", False, ss)
        x509_extensions.append(san_constraint)
    req.add_extensions(x509_extensions)
    # Utilizes generateKey function to kick off key generation.
    key = generateKey(TYPE_RSA, 2048)
    req.set_pubkey(key)
    req.sign(key, "sha1")
    generateFiles(csrfile, req)
    generateFiles(keyfile, key)
    return req

对于有关如何将 SAN 添加到 CSR 的第一个问题，请考虑使用add_extensions https://github.com/pyca/pyopenssl/blob/77acc3638722fb55744478c00efba07abd6d5a0b/OpenSSL/crypto.py#L824方法上的X509req对象（奇怪的是在文档为X509req class http://pythonhosted.org/pyOpenSSL/api/crypto.html#x509req-objects)

它看起来像这样

altnames = ', '.join(['DNS:foo.example.com',
                      'DNS:bar.example.com', 
                      'IP:203.0.113.12'])
req.add_extensions([OpenSSL.crypto.X509Extension("subjectAltName", 
                                                 False, 
                                                 altnames)])

更新：感谢彼得·加拉格尔 https://stackoverflow.com/users/2476882/peter-gallagher用于捕获丢失的类型前缀（例如DNS, IP）在我原来的答案中。