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//proc/self/root/usr/share/doc/m2crypto-0.16/demo/x509/demo1.py

#!/usr/bin/python

"""X.509 certificate manipulation and such.

import os

from M2Crypto import X509
from M2Crypto.EVP import MessageDigest

def demo1():
    print 'Test 1: As DER...'
    cert1 = X509.load_cert('server.pem')
    der1 = cert1.as_der()
    dgst1 = MessageDigest('sha1')
    dgst1.update(der1)
    print 'Using M2Crypto:\n', `dgst1.final()`, '\n'

cert2 = os.popen('openssl x509 -inform pem -outform der -in server.pem')
    der2 = cert2.read()
    dgst2 = MessageDigest('sha1')
    dgst2.update(der2)
    print 'Openssl command line:\n', `dgst2.final()`, '\n'

def demo2():
    print 'Test 2: As text...'
    cert = X509.load_cert('client2.pem')
    print 'version     ', cert.get_version()
    print 'serial#     ', cert.get_serial_number()
    print 'not before  ', cert.get_not_before()
    print 'not after   ', cert.get_not_after()
    issuer = cert.get_issuer()
    #print 'issuer      ', issuer
    print 'issuer.C    ', `issuer.C`
    print 'issuer.SP   ', `issuer.SP`
    print 'issuer.L    ', `issuer.L`
    print 'issuer.O    ', `issuer.O`
    print 'issuer.OU   ', `issuer.OU`
    print 'issuer.CN   ', `issuer.CN`
    print 'issuer.Email', `issuer.Email`
    print 'subject     ', cert.get_subject()
    #print cert.as_text(), '\n'

def demo3():
    cert = X509.load_cert('server.pem')
    while 1:
        x = cert.get_subject()

if __name__ == "__main__":
    #demo1()
    demo2()
    #demo3()