devel/cert_digest.py

#!/usr/bin/python

# Copyright (C) 2015 Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# This is a test script to ease debugging of SSL problems. It can be
# applied on any of Ganeti's SSL certificates (for example client.pem
# and server.pem) and will output a digest.

import sys
import OpenSSL


def usage():
    print "%s filename" % sys.argv[0]
    print
    print "'filename' must be a filename of an SSL certificate in PEM format."


if __name__ == "__main__":

    if len(sys.argv) < 2:
      usage()

    cert_fd = open(sys.argv[1], "r")
    cert_plain = cert_fd.read()

    print "Certificate:"
    print cert_plain

    cert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM,
                                           cert_plain)

    print "Digest:"
    print cert.digest("sha1")