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C:/Python34/Tools/scripts/_[ Not.Writable ]

File:C:/Python34/Tools/scripts/get-remote-certificate.py

#!/usr/bin/env python3
#
# fetch the certificate that the server(s) are providing in PEM form
#
# args are HOST:PORT [, HOST:PORT...]
#
# By Bill Janssen.

import re
import os
import sys
import tempfile


def fetch_server_certificate (host, port):

    def subproc(cmd):
        from subprocess import Popen, PIPE, STDOUT
        proc = Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True)
        status = proc.wait()
        output = proc.stdout.read()
        return status, output

    def strip_to_x509_cert(certfile_contents, outfile=None):
        m = re.search(br"^([-]+BEGIN CERTIFICATE[-]+[\r]*\n"
                      br".*[\r]*^[-]+END CERTIFICATE[-]+)$",
                      certfile_contents, re.MULTILINE | re.DOTALL)
        if not m:
            return None
        else:
            tn = tempfile.mktemp()
            fp = open(tn, "wb")
            fp.write(m.group(1) + b"\n")
            fp.close()
            try:
                tn2 = (outfile or tempfile.mktemp())
                status, output = subproc(r'openssl x509 -in "%s" -out "%s"' %
                                         (tn, tn2))
                if status != 0:
                    raise RuntimeError('OpenSSL x509 failed with status %s and '
                                       'output: %r' % (status, output))
                fp = open(tn2, 'rb')
                data = fp.read()
                fp.close()
                os.unlink(tn2)
                return data
            finally:
                os.unlink(tn)

    if sys.platform.startswith("win"):
        tfile = tempfile.mktemp()
        fp = open(tfile, "w")
        fp.write("quit\n")
        fp.close()
        try:
            status, output = subproc(
                'openssl s_client -connect "%s:%s" -showcerts < "%s"' %
                (host, port, tfile))
        finally:
            os.unlink(tfile)
    else:
        status, output = subproc(
            'openssl s_client -connect "%s:%s" -showcerts < /dev/null' %
            (host, port))
    if status != 0:
        raise RuntimeError('OpenSSL connect failed with status %s and '
                           'output: %r' % (status, output))
    certtext = strip_to_x509_cert(output)
    if not certtext:
        raise ValueError("Invalid response received from server at %s:%s" %
                         (host, port))
    return certtext


if __name__ == "__main__":
    if len(sys.argv) < 2:
        sys.stderr.write(
            "Usage:  %s HOSTNAME:PORTNUMBER [, HOSTNAME:PORTNUMBER...]\n" %
            sys.argv[0])
        sys.exit(1)
    for arg in sys.argv[1:]:
        host, port = arg.split(":")
        sys.stdout.buffer.write(fetch_server_certificate(host, int(port)))
    sys.exit(0)

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Regist : 09-12-2024	Expired : 01-12-2027