我需要验证证书是否由我的自定义CA签署。使用OpenSSL命令行工具,这是很容易做到:如何在python中验证SSL证书?
# Custom CA file: ca-cert.pem
# Cert signed by above CA: bob.cert
$ openssl verify -CAfile test-ca-cert.pem bob.cert
bob.cert: OK
但我需要做同样的事情在Python,我真的不想调出命令行实用程序。据我所知,M2Crypto是OpenSSL的“最完整的”python包装,但我无法弄清楚如何完成命令行工具的功能!
参考this question对于如何在C代码中完成相同的任务,我已经能够获得大约一半的时间。 我选择的变量名称与openssl verify命令行实用程序的源代码中使用的名称相同,请参阅openssl-xxx/apps/verify.c
。
import M2Crypto as m2
# Load the certificates
cacert = m2.X509.load_cert('test-ca-cert.pem') # Create cert object from CA cert file
bobcert = m2.X509.load_cert('bob.cert') # Create cert object from Bob's cert file
cert_ctx = m2.X509.X509_Store() # Step 1 from referenced C code steps
csc = m2.X509.X509_Store_Context(cert_ctx) # Step 2 & 5
cert_ctx.add_cert(cacert) # Step 3
cert_ctx.add_cert(bobcert) # ditto
# Skip step 4 (no CRLs to add)
# Step 5 is combined with step 2...I think. (X509_STORE_CTX_init: Python creates and
# initialises an object in the same step)
# Skip step 6? (can't find anything corresponding to
# X509_STORE_CTX_set_purpose, not sure if we need to anyway???)
#
# It all falls apart at this point, as steps 7 and 8 don't have any corresponding
# functions in M2Crypto -- I even grepped the entire source code of M2Crypto, and
# neither of the following functions are present in it:
# Step 7: X509_STORE_CTX_set_cert - Tell the context which certificate to validate.
# Step 8: X509_verify_cert - Finally, validate it
所以我中途有,但我似乎无法真正得到确认完成!我错过了什么吗?是否还有其他的功能,我应该从M2Crypto使用?我应该寻找一个完全不同的OpenSSL python包装吗?我如何在python中完成这个任务!?!?
请注意,我使用证书来加密/解密文件,所以我对使用基于SSL连接的对等证书验证(其中有already been answered)没有兴趣,因为我没有任何SSL连接去。
是否有任何理由你不想调用命令行工具?似乎你可以为自己节省一大笔头痛...... – katrielalex 2010-12-09 21:08:12
是的,这是针对将被部署在许多不同的操作系统上的软件,无论新老,大小,都包括潜在的嵌入式系统(足够大以包含python) )。我想要最大的便携性和最高性能。如果我可以避免的话,我不想让潜在的成千上万个呼叫进入命令行。涉及大量证书。 – Nathan 2010-12-09 22:20:35
相关http://stackoverflow.com/q/2626792/4279 – jfs 2010-12-16 05:34:23