由于 ASN1 值，提交到 IIS CA 的 CSR 失败

Question

我已经从 pyOpenSSL 生成了私钥/CSR - 下面的代码片段：

键：

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

企业社会责任：

req = crypto.X509Req()
# Return an X509Name object representing the subject of the certificate.
req.get_subject().countryName = country
req.get_subject().stateOrProvinceName = state
req.get_subject().localityName = location
req.get_subject().organizationName = organisation
req.get_subject().organizationalUnitName = organisational_unit
req.get_subject().CN = nodename
# Add in extensions
#base_constraints = ([
#    crypto.X509Extension("keyUsage", False, "Digital Signature, Non Repudiation, Key Encipherment"),
#    crypto.X509Extension("basicConstraints", False, "CA:FALSE"),
#])
#x509_extensions = ([])
x509_extensions = []
# 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)
# 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(_csrfile, "w")
    f.write(crypto.dump_certificate_request(crypto.FILETYPE_PEM, req))
    f.close()

我从 IIS CA 返回的错误是：

ASN1 bad tag value met. 0x8009310b (ASN: 267)

根据Microsoft，这是由于：

This behavior occurs when certificate request is stored in a file in Unicode encoding. Microsoft Certificate Services do not support Unicode-encoded files request files. Only ANSI encoding is supported.

我知道如果我在命令行上从 openssl 生成 CSR，它会被 IIS CA RESTful web 服务接受并发布，没有错误。

我想知道是否有某种方法可以从 pyOpenSSL 生成 'ANSI' 编码文件 - 我不确定是密钥文件还是用密钥文件签名的 CSR 导致了问题.

Answer 1

感谢@yodatgWhosebug question，我已经在这个Whosebug question的帮助下解决了它。

问题的发生是由于 bug in pyOpenSSL 已修复。

通过发行：

openssl asn1parse -in certificates/cert.csr

我可以看到 ASN1 值：

8:d=2  hl=2 l=   1 prim: INTEGER           :01

在工作的 CSR 中，它看起来像这样：

8:d=2  hl=2 l=   1 prim: INTEGER           :00

然后我更改了我的代码以在签名之前包含对请求对象的 set_version 调用：

#set version - IIS CA required this
req.set_version(0)

# Set the public key of the certificate to pkey.
req.set_pubkey(priv_key)

现在已解决。

由于 ASN1 值，提交到 IIS CA 的 CSR 失败

CSR submitted to IIS CA fails due to ASN1 value

python

unicode

openssl

csr

pyopenssl