parseSSLCert.py

import OpenSSL
import sys

def parseCert(certFile):

        cert = open(certFile, 'rb')
        x509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, cert.read())

        subject = x509.get_subject()
        issuer = x509.get_issuer()
        fingerprint = x509.digest('sha1')
        subject = x509.get_subject()

        print '%-25s %s' %('SHA1 Fingerprint:',fingerprint)
        print '%-25s %s' %('Serial Number:',x509.get_serial_number())
        print '%-25s %s' %('Common Name:',subject.CN)
        print '%-25s %s' %('Organization:',subject.O)
        print '%-25s %s' %('Issuer CN:',issuer.CN)
        print '%-25s %s' %('Issuer Org',issuer.O)
        print '%-25s %s' %('Issue Date:',x509.get_notBefore())
        print '%-25s %s' %('Expiration Date:', x509.get_notAfter())

def main():
        if len(sys.argv) != 2:
                print '\nUsage: python ./parseCerts.py [cert file]\n'
                sys.exit(1)
        parseCert(sys.argv[1])

if __name__ == '__main__':
        main()